Digital battery

Response to climate change, financial crisis, the development of low carbon economy, countries around the world, seeks to invest in new Sony VGP-BPS8A Sony VGP-BPL8 energy. Governments on the new energy industry, a high degree of concern and attention to the strategic level, will certainly lead to the energy industry news related to the promulgation of a policy of support for the development of a new industry World Energy to create a better environment. At the same time, to win in the new cycle of economic growth cycle to gain competitive advantage, countries should seize the new industry standards for energy, with a view through a standard master the law International speaks.

 

States to the new energy industry, “a giant cake”

 

Currently, the United States, Germany, Japan, South Korea and China have been or are being introduced massive new energy development plan, will focus on wind, solar, the nuclear energy, biomass energy, new energy and auto industries, the development of new energy. In different countries according to their distinct competitive advantages, catch-me-to contribute to the forefront. Inspiron 6000 battery Inspiron 9300 battery

 

EU: New strategy for energy development has been the strategy of the European Union to control the global climate is important. After the outbreak of the global financial crisis, the European Union to strengthen the energy sector has been in the new comparative advantages, and further increased political support. The EU in December 2008 approved by EU climate and energy package to ensure that the new European Union by 2020 the overall consumption of energy in the ratio of energy up to 20%. According to the European Union in October 2009 announced a “strategic energy technology,” the EU in the next 10 years, investing at least 50 billion euros for research into clean energy and development.

 

U.S.: Obama government attaches great importance to developing new energy sources, said the new energy and environmental protection in the field of re-directing the world. In February 2009, the U.S. Senate and the House passed “in 2009 to restore and re-investment Act” in the budget of 789 billion U.S. dollars of about 500 billion dollars to promote energy efficiency and the expansion of production of new energy. In June 2009, the U.S. House of Representatives passed “The U. S. Clean Energy and Climate Security Act, plans for the electricity sector by 2020 at least 12% of its electricity from wind, solar and other energy sources. Satellite M105 battery Satellite M40 battery

 

Japan: Japan has been active development of solar energy, wind energy, nuclear energy, new energy, the use of bio-electricity, energy waste, geothermal energy production and production of fuel cells as a new energy, especially the development of solar energy use and high expectations. After years of developing solar energy in Japan has been increasingly common, many families have purchased solar energy installations. In 2009, the Japanese government to implement the benefits of tax cuts, raising the fuel tax to encourage new energy vehicles to stimulate consumption, policies to promote the development of the energy industry Japan’s new automobile.

 

China: In order to cope with climate change, reducing emissions of greenhouse gas emissions, saving low-carbon transition in recent years, China have begun to focus on developing new sources of energy, launched the “Renewable Energy Law” and “renewable energy development and long-term plan.” In June 2007, the Chinese government issued “special shares of China to address the climate change science and technology, clearly had to focus on developing new energy technologies and renewable energy jobs; March 2009 release, “restructuring of the auto industry and the revitalization plan,” to put clearly before the 2011 500000 years to form the production capacity of electric vehicles in short-term goal. In 2009, the Government will make a new energy, energy saving environmental protection, electric vehicles and other industries to support the inclusion of a strategic sector. In addition, the “new revitalization of industry and energy development planning” also comes soon. ThinkPad T41 battery ThinkPad T42 battery

 

Some broad guidelines and priorities for future development point of view, mainly in wind, solar, biomass, nuclear energy, new energy and development of the automotive industry. For the use of wind energy, the EU is technically temporary occupancy of the first, the United States on a temporary advantage in size, but the rapid development of China, the future may lead, in the the use of solar energy, China, the United States, Japan, Germany is the industry of solar energy in the world, the semi-final, China lead the world, but the advantage n is not significant, the use of nuclear energy, China and the United States, France, Japan and other countries the difference is greater, but the rapid growth in the future, biomass, Brazil and the United States are the vanguards of the most technologically advanced compared to other countries on the list in the new energy vehicles, development of new energy vehicles in Japan dominates the market and the pace The most rapid industrialization, especially the rapid hybrid, the new trend of China’s auto industry energy development over Well, the gap between countries is not too large. In short, the development of new energy, the global situation can be considered as one game, but the ruling remains to emerge.

 

International technical standards for the right to talk about these gloves are off F3172A PB995A

 

Normalization is technological, economic and social development are based, should form the basis of competitiveness of countries and regions, the basic elements, is building an innovation-oriented country of significant technical support for companies to improve the capacity of independent innovation of the important content is important to standardize the market economic order of technical regulations. Implement the technical standard strategy to continuously improve the quality of products and improve their core competitiveness and achieve their long-term development and growth of great importance. Therefore, the implementation of technical standards is not only improve the strategic capability of independent innovation, enhance competitiveness of products and industries, urgent needs, but also controls the companies to compete international market, an important way to break the technical barriers to trade.

 

International technical standards of a country on the international market, the initiative and fight for the right to speak, to reflect national needs and national interests, an important tool, is a country of laws and regulations restrict the list of new products, an important way. However, for many years, international technical standards development, the power of amendment has been dominated by developed countries, holds patents on basic technology of its chain of multinational corporations de facto standard in the industry standard of the Business, international standards, technology for developing countries and progress constitute a serious obstacle to industrial development. Because once certain industries or national standards based on these companies to develop technologies or products, with all other companies do not meet the standard must be related to the production process of its transformation, leading inevitably to wasted considerable cost, and they had to pay R & D to suddenly become meaningless, the future of PA3383U-1BRS PA3395U-1BRS technology has made considerable shrinkage of the market value of a moment. As developed countries, advanced technology, developing countries, lagging technology, the decision of the trade structure of the theory of comparative advantages of international division of labor domination, this has emerged a sense of inevitable nature. However, new energy technology is different from developed and developing countries stand on the baseline Same arrival, developing countries in formulating standards for new energy technologies may have the opportunity to take the initiative may seize the opportunity to require the government and business efforts.

 

The energy sector of the new car based on the benefits being the energy industry and the state of the automobile industry a pillar, and thus by the governments and enterprises attach great importance. Developed countries have already embarked on a new energy standards for competition vehicle technology for the right to speak. Companies in the Japanese automotive industry to enter international technical standards for the right to speak have been faster than moving the other. We learn that the relevant United Nations will be in March 2010 revised standards for motor vehicles in the world, when the creation of hybrid and electric vehicles, global harmonization of safety standards, while the Toyota Prius and Honda Insight the technical specification should complete negotiations to become the global standard.

 

Companies in the Japanese automotive industry to compete for new energy initiative in China in the standard technology of the automobile has been for many years. A few years ago, Toyota has managed to influence the development of national standards for hybrid car in China. In 2009, Nissan quietly intervene in electric car technology in China, developing standards, and increase car prices on the domestic electric cars the standard speech competition on the right. Satellite M50 battery Satellite M55 battery

 

Electric Vehicle Technology, who led the final standard is unknown, but the car companies in North America hope that the technical standards for new energy vehicles in efforts to gain a place worthy of support. Currently, the three new energy technologies for vehicles, fuel cells and alternative energy left in the standard to be developed. To enter the remaining possibilities for domestic firms need to learn and work together to fight. Similar to the traditional automotive industry, technology is the key element of the new energy standards for cars in the priority dispute. Complete control over parts of the world “standard” right to speak, it is unlikely, but he can fight for the base components of the right to free speech. Although the automotive industry in China in the automotive sector has traditionally been difficult to catch up with developed Western countries, but in fuel cell vehicles to alternative fuel vehicles and pure electric vehicles and other new energies for sectors individual and key technologies are much can be achieved.

 

Competing technical standards, the right to speak, depends crucially on whether the level of business technology and more mature. Production and innovation research and the establishment of a regional political alliances, the government has integrated companies, universities, research institutions, the benefits of their resources and work together to overcome the technical difficulties and build capacity independent innovation and we try to grasp the essentials of intellectual property rights independently, is conducive to the industrialization of new energy vehicle development, but also help local companies compete for the technical standards for new energy vehicles right to speak. At present, China has put in place in Beijing, Chongqing, Guangdong, Jilin and other regional energy alliance in new automotive industry. 371785-001 417066-001

Portable using a period of time longer prone to the problem of declining capacity of the battery, leading to the life of the battery cell shortened. This is essentially internal batteries or battery failure caused by aging. In severe cases, the use of calibration procedures of the Laptop battery or the battery charge and discharge are repeated to solve the problem. For this issue, there are many fans that the shell of the battery opens, find and replace the batteries may be unable to solve the problem. The current situation is really the case?

Replacement batteries must be cautious

 

Since the laptop is now a greater use of lithium-ion batteries, while the life of lithium-ion battery is essentially constant, and its battery life of only 500 to 800 times. Therefore, if often use battery-powered laptop, later, 1 ~ 2 years, the battery is easy to achieve because of the internal life of the batteries fail. As we open the battery when the battery test is represented in one or two batteries damaged. However, due to other cells that is about it, even if you replace the batteries fail, the battery can be quickly returned to normal, will soon fail for other batteries and battery life can be full used again.

 

Then, all of the laptop Dell Latitude D820 battery to replace all the internal capacity to solve the problem? In fact, it’s hard. Because in the original cell, after its internal batteries game specifically, if the battery capacity, the terminal voltage and internal resistance of the consistency property. We bought on the market in batteries, and have not been tested and matching, we can not for the amateur conditions, combined batteries, so its capacity, internal resistance and other parameters vary inevitable. In the internal battery, batteries are in series between them after the load (in most notebook battery, is 8 cells were divided into two groups, four in series and then parallel to form a battery pack) due to the battery charging current from which the smaller capacity batteries will be the first total power, but not enough because the other battery, the battery terminal voltage can not create voltage load circuit will continue to charge the battery pack. In this way, the batteries supply the original track will be overloaded. To reduce the charge time, laptop charging circuit load current is very high, so will charge batteries when the tremendous heat, so that the batteries inside the liquid temperature increases, pressure increased, the internal electrolyte easily dry up or overflow, leading to a further decline in cell capacity, there is a swelling or even an explosion. The total capacity of the battery capacity by the decisions that smaller batteries, so that would create a vicious circle, after repeated charge-discharge capacity of the whole battery would be considerably reduced, which leads the ‘Time use laptop.

 

At the same time, a number of laptop batteries to prevent unauthorized users from opening to replace the batteries, has a microchip and an anti-line off Cape. As the hull of the hp 417066-001 battery or batteries to open the line of the battery Remove the card and smart circuit protection will cease production of the battery. Even if we re-take the battery circuit of the battery and close the battery chamber, its smart protection is still not recovering. In this way, the battery will not work out. We need to re-reset the smart chip to solve this problem, but a condition amateur can not reset the chip to chip. Therefore, replace the batteries when the battery can cause permanent damage.

 

So how can we solve the battery problem? The best way of course, is to buy a new battery of origin, but now a new original equipment batteries for hundreds or even thousands of dollars, this cost is too high, higher than many consumers can afford. However, there are a number of professional station laptops repair, equipment and technology are good, but there are repair stations and manufacturers of batteries existence of long-term cooperative relations, the VGP-BPS8 battery can be made corresponding precision. This would maintain the quality. In these places for the price of batteries is about 300 yuan, although it compares to replace the batteries of their own at higher prices, but it can protect the long-term use of the battery. In addition, some service stations are also carried out repairs for six months before the battery warranty. We use these six months, while there are a hundred times or two to ensure the battery charge and discharge, and battery capacity and stability during this period, then after the battery is about to enter a stable period is not easily damaged.

 

The trick to keep the battery

 

In any case, replace the batteries do not require us to pay a little more, so we must be aware in their daily use to maintain the battery to extend battery life. To protect the battery, first reduce the number of battery, which means it is electricity to the extent possible not to use the toshiba PA3399U-2BAS battery. This can reduce the number of loading and unloading of the battery to extend battery life. Although this use to a few drawbacks, but think of you each time you use the battery, it must pay two dollars, be prudent in the summer bar.

 

Battery internal structure diagram

 

Calibration procedures battery can extend the battery life has been a debated issue. Support of people think that the calibration of the battery can eliminate the memory effect of batteries to extend battery life. Opponents argued that now use lithium-ion batteries have no memory effect, if the correction procedures will only increase the number of loading and unloading of the battery and shorten the life of battery. In fact, two types of agreement are incomplete. While the reduced lithium-ion battery memory effect, but the memory effect still exists. Calibrating the battery may actually reduce the memory effect, but this is not the most important function of calibrating the battery main procedure is to establish the battery and control circuit, in order to optimize the control circuit can correctly identify the capacity of the battery to avoid overcharging or over-rejection phenomenon. At the same time, you can also ensure that the apple A1079 battery is exhausted before the system closed to protect data security. However, frequent use of calibration procedures of the battery would indeed increase the battery charge and discharge time. Therefore, we once every three months or if the calibration procedure of the drums on it. We use energy from the battery when the laptop or adapter to charge the battery, disconnect the battery cell. Regardless of the battery is charged or discharged state, the current is very important if we try to connect the battery, it is easy to produce electrical sparks, not only will the removal of contact, the impact of the current May also cause the board of the battery or system portable charging circuit damage.

In addition, many people there are some misconceptions about the use of the battery. Such as “newly purchased batteries need to go through a few charge-discharges to enable,” “laptop battery needs to full output:” In fact, Li-ion battery memory effect with the reduction and improving battery protection circuit internally. These factors affect the capacity of the battery was very low, and we only run the calibration procedures of battery on a regular basis will be able to eliminate the impact of these Operations on the stack, we must not wait for that, and that more carefully your laptop, after all, the battery is presented useful.

In response to the most powerful features of the 3C products, battery technology must also constantly develop initiatives to provide this generation of power more hungry, more eager for 3C products. The four most common types of rechargeable batteries - nickel-cadmium, nickel hydrogen, lithium ion and lithium-polymer at the end what is the difference? What are the advantages and disadvantages of each? Xiao Jiang in this year trying to find on the network to analyze the data you send.

 

Nickel-cadmium batteries (NiCd)

 

Is the oldest of a rechargeable Laptop battery technology, earlier in 1899, was invented out. Nickel-cadmium batteries can withstand a short-term benefit is that many releases, and the process of charging the reaction is endothermic - the latter feature can be quickly charged or not cause too much damage to the battery. Nickel battery voltage is 1.2V cadmium, than ordinary alkaline batteries 1.5V slightly less marked, but because the process of voltage alkaline battery discharge will continue to fall at a time when no power n ‘ is typically only 1V, but the nickel-cadmium batteries will have been to provide a stable 1.2V voltage without electricity until the date, so the majority of electronic products using alkaline batteries can be used in nickel cadmium batteries, no problem.

 

Better known shortcomings of nickel-cadmium batteries is the so-called “memory effect”, ie when the battery is discharged there is still no electricity, no longer charge the battery “remember” this position after the electricity used in such a long time left, the battery occur, and do not like the answer to electricity (transient voltage drop). Therefore, nickel-cadmium rechargeable batteries need to go through a period of pre-discharge process will be private only after charging power. Most nickel-cadmium IBM ThinkPad X60 battery charger will discharge the function automatically.

 

Nickel-cadmium batteries, for storing loads of smaller (probably only alkaline batteries 1 / 4), and cadmium are toxic heavy metals, making it less visible. Most applications have been near its nickel-metal hydride battery (NiMH) battery replaced.

 

Nickel-metal hydride batteries (NiMH)

 

Nickel-metal hydride batteries and nickel-cadmium batteries are nearly the same technology, but will be replaced by the hydride anode cadmium only. This is the most features and the same nickel-cadmium batteries, but electricity build higher memory effect is somewhat less obvious (but actually still exists). Ni-MH battery biggest problem is that it has a high self-discharge rate, which is obviously saturated electric charge of the battery, do not book a month, the power to be out May 30 percent less spectrum.

 

The use of 5 (AA) and 7 (AAA) applications-size Dell Latitude D410 battery, nickel-metal hydride rechargeable batteries are currently the mainstream, but has a greater capacity to feed demand, or need to make hours of volume, it is required by lithium-ion batteries by …

 

Li-ion battery (Li-ion)

 

Lithium-ion batteries battery is almost fantastic, has a large capacity, small size, light weight, no memory effect, the tension is high, and self-discharge is small, therefore not surprising that the majority see the modern 3C products were obtained using lithium-ion (or lithium polymer) battery has.

 

But the seemingly perfect lithium-ion battery is always a risk - the most obvious point that it has quite a strong tendency to self-explosion, but so much energy packed into a small space, and exploded is very dramatic to wait a. To avoid a dangerous place, lithium batteries should be many safeguards in the hp 417066-001 battery charging and overshoot or overheating, and automatic shutdown. These additional circuits and institutions, so there is no III / IV-size lithium-ion batteries, and why such a high price due laptop battery.

 

Lithium-ion batteries have a characteristic relatively little known interesting is that you have not used it will be the largest building materials capacity of the battery with an oxidation decreased gradually. In general, at room temperature, the lithium-ion batteries to increase the power will decrease by about 20% per year, and over temperature, load survived eating, falling rapidly, has survived. So if you have a notebook cooling relatively poor, so much time at full power at 60 ° C environment lithium battery can lose 40% within three months from the accumulation of power.

 

Here are suggestions for the lithium-to-date:

 

1. Do not use only the electric light rechargeable - lithium do not like being discharged into the finish, so if you often find themselves using the power of the laptop dry, then he changed the helm of the largest battery stars!

2. Do not load to full power over - as I said before, battery chargers and more saturated, the power has fallen even faster, so keep saturation 60 to 80% is the best state. In addition to Panasonic’s pen seems a pity that foreign power, to achieve this is not easy.

3. For each batch of 30 regular and landfill, we have come to use “dry” discharge - Lithium-ion battery itself is not afraid of a short period of time, a small quantity of charge and discharge, but the protection circuit above may be denial of justice at the end now, how much sony VGP-BPS5A battery power there. A major electrical discharge to dry, then charged at full saturation should be able to protect the loop “correction” to return. Many laptops have a software or even when in the BIOS to provide such functionality.

4. Notebook using AC power source, remove the battery down - because the previous building, said the decline in power. Remove the battery down, at least he did not have access to the computer itself, the heat. If the battery has subsequently launched a refrigerator better.

5. The battery when it is closed, leaving about 40% of electricity inside - leaving too many questions will strengthen the capacity reduced, leaving too little may damage the battery. Nansi Hu really ah!

6. To buy the batteries must buy a new - a new battery has full power Oh!

 

Lithium-polymer battery (Li-Pol)

 

Lithium polymer and lithium-ion batteries, as a rule, only part of the polymer electrolyte instead. This makes lithium-polymer batteries can be molded into a variety of forms (for consumers is not a good thing), in line with the demand to be different. Lithium-polymer batteries are also safer than lithium-ion batteries at high temperature, impact, but there is always an overload when the risk of explosion. Other maintenance principles are the same, and lithium-ion battery (therefore prefer to use the mobile phone battery lithium load each day, do not use photo-electric and have dependents).

Network, the most popular laptop battery BatteryMon2.0 tests software, it is a green laptop battery test software, there is the Chinese version, I felt this test software was good, more Intuitive! Users can see the discharge curve of the battery to determine the current state of the battery, but can also test the use of maximum power from your battery time! This article describes a new set of software testing Eate battery is a good software can be downloaded free, interested friends may want to test yourself down under the battery.

 

Preface test battery for notebook: Laptop battery always undermine the effectiveness of the user to understand laptop battery at the maximum load, minimum load, or other ordinary cases, what happens to last they became the laptop users, the future of mobile computer users concerned about the main factors.

 

Laptop battery test body: The laptop has some knowledge of friends may know yourself to determine the resistance of the batteries in your laptop in two ways.

 

Laptop battery Test Method 1: the battery is fully charged unplug the power cord from the outlet, start the motherboard to supervise every moment to write a report file information (e.g., CPU frequency), so that when the battery after the power is empty, you can see the records of test report start and end time, their difference is the lifetime of the battery. To avoid the process of writing the information because of electricity caused by the report file is damaged, you’d better put in two different file formats along with written information. This method may help you estimate the load at the minimum operating time of battery. If you want to test your computer when you run certain applications, the operating time of battery you can cut the power to open these applications before running.

 

Laptop battery Test Method 2: Buy special test software to be certified as Brand Mobile. It is by running some special programs to test your endurance of the battery cell. And it is often more tests save system resources. Sometimes playing Unreal Tournament (Unreal Tournament) The class of the game, if using Mobile Mark test data to estimate the lifetime of the battery is not an easy task. Mobile Mark also provides a feature called the reading test, it can mimic the user to view a page of text file, and his results speak for your notebook batteries in the use of minimal loading time.

 

However, I believe that the use of mobile professionals Mark test software must be quite expensive, using the program monitors motherboard also appeared not specific enough, so here we recommend a battery of testing new software - PC Portable battery of tests of software-Battery Eater.

 

Test software on the laptop battery Battery-Eater

 

Mobile software test Dell Inspiron E1505 battery-Battery Eater is a software specifically for the X-test bitlab developed in the laboratory. With this simple procedure and practice, we can not only test the laptop batteries in different work environments where the potential can also use this software generates various tables and graphs to include a variety of test data and configuration information of ‘computer.

 

Until 2002, December 20, after a number of improvements needed and perfect after, Battery Eater the first edition was published. At that time, the first information of user feedback indicates that the software should also continue to improve, so that the second edition of the software Battery Eate is quickly delivered. On January 5, 2003, 2003 Battery Eater X-bitlab the first laboratory official release. Hou then start the software on the new report system configuration, status indicators for hp 417066-001 battery charging and maps of battery discharge and other functions. Is even more gratifying is that BatteryEater available for free download.

 

As we all know that many non-profit software usually remain in the initial test version and would never consider going to improve, although a little bit. This software Battery Eater is on the contrary, it is up to date has been made several improvements and perfection. This little program was included in the site of much free software, and after a number of web site column and test specification validation

Lithium-ion battery circuit protection includes over-load protection, more protection against overcurrent / short circuit and over-discharge protection, and requires great precision charging protection, protection IC with low power consumption electric volt high-voltage and zero batteries and other features. This paper describes the principle of the three protection circuits, new functions and features required.

 

In recent years, PDAs, digital cameras, cell phones, portable audio devices and Bluetooth products get more and more use of lithium batteries as main power. Li-ion Laptop battery has a small size, high energy density, no memory effect, the high cycle life, high-voltage batteries and the advantages of low self-discharge rate, and nickel-cadmium batteries in nickel metal hydride are not the same lithium batteries must consider the charge and discharge of security so as to prevent deterioration characteristic. To overload the lithium battery, over discharge, over current protection and short-circuit is very important is usually the design of the battery circuit protection to protect Li-ion battery.

 

Because lithium high energy density-ion battery, it is difficult to ensure the safety of the battery. In the most charged, the battery temperature increases after the excess energy, so the decomposition of the electrolyte produced gas because of the internal pressure of the danger arising from the spontaneous combustion or broken on the contrary, over-discharge state, due to the decomposition of the electrolyte causing the Dell Inspiron 5150 battery characteristics and the degradation of sustainability, thus reducing the number of charge cycles.

 

Lithium-ion battery circuit protection is to ensure that this excess charge and discharge state of security and to prevent deterioration characteristic. Lithium-ion battery circuit protection is protected by the CI and structure of two power MOSFETs, including the protection IC for monitoring the battery voltage when there is excessive charges and the discharge state to pass the order to fill the power MOSFET to protect the battery, protect the functions of the IC during the load protection, over-discharge protection and protection against overcurrent / short circuit.

 

1, an overload protection

 

The principle of over-charge protection IC as follows: When an external charger for lithium battery, when, to avoid a temperature rise caused by increased internal pressure must end the state of load. At this stage, the need to test the hp 417066-001 battery voltage to protect IC when the time comes to 4.25V (assuming that the point of overcharging 4.25V) which activate the over-load protection, the MOSFET power to cut through the opening and closing the load.

 

In addition, attention must also be the result of excessive noise generated by the perception of dysfunction detected if determined to be overload protection. Therefore, the need to adjust the delay and time delay can be shorter than the noise.

 

2, over-discharge protection

 

In the case of excessive discharge, the decomposition of the electrolyte in case of damage caused by the characteristics of the battery and cause a reduction in the number of charge cycles. Protection of lithium-IC with on-rejection phenomenon can be avoided to protect the battery.

 

Over-the principle of discharge protection IC: To avoid excessive sony VGP-BPS2A battery status at discharge, assuming that the lithium battery connected to the load when the voltage of the lithium battery is less than the highest - point of discharge voltage detection (assumed to be 2.3V) will activate the over-discharge protection, so that the power MOSFET transition from open-cut and the threshold of discharge, to avoid battery-phenomenon discharge, and keep the battery low quiescent current in standby mode, yet current 0.1μA.

 

When the lithium battery is connected to the charger and the battery voltage lithium is greater than this period of excessive discharge voltage, over-discharge protection is lifted. In addition, taking into account the conditions of discharge pulse, excessive discharge detection circuit with time delay to prevent malfunction.

 

3, the current and short-circuit current

 

For unknown reasons (discharge or negative by metallic objects inadvertently) caused by over-current circuit or short to ensure security, you should immediately cease its discharge.

 

Terms runway Principles of protection against overcurrent IC, when the discharge toshiba PA3399U-1BAS battery current is too large or too short occurs, the protection IC is turned off (short circuit) current protection, over current detection at the moment is to power MOSFET’s Rds (on) as a sensor monitoring the impedance voltage drop in the case, if the ratio set by the voltage-current detection is higher when the discharge stopped, the formula is:

V = I × Rds (on) × 2 (V-for over-current detection voltage, I is discharge current)

Suppose V = 0.2V, Rds () = 25mΩ, and protect the current size of I = 4A on

Similarly, too much time current detection delay should also be provided to prevent current flow generated when there are unexpected failures.

Usually, after the election of overheating if they can remove the excess current factors (such as the charge immediately and out) will resume its normal state, may proceed with the normal load, the discharge action.

 

4 new protection features of the lithium-IC’s

 

In addition to the protection feature of the lithium IC attention the following new battery features is also interesting:

a. Charging over-current protection

When connecting the charger suddenly aware (as the charger is damaged), on-circuit current detection immediately, this time from top to bottom Court, the MOSFET power to cut the open position for protection.

V = I × Rds () × 2

(I is the load current; Vdet4 on voltage-current detection, Vdet4 to-0.1V)

 

b. Overcharge when the lock mode

Usually protect the IC in the over-charging protection will be after a period of delay time, and then it will cut the power MOSFETs to achieve the goal of protection when the battery voltage lithium dropped in points Lifting (hysteresis voltage overload), when it will resume once again continue to impose protection →Discharge charge discharge. Security issues in this state will not be able to get an effective solution, lithium batteries will always repeat the charge discharge →Action load discharge gate MOSFET power will be repeated alternately at high and low voltage state, which could make the MOSFET heater but it also reduces the battery life, if the lock mode is very important. If the circuit of the lithium battery protection detects over-protection mode load locked, IC will not get hot, and the relative security has improved considerably.

In the over-load protection, simply plug the battery charger, the charging time will be entered into lock mode. At this stage, even if the voltage drops of the lithium battery can not produce the recharge of the situation, remove and connect to load and unload the load can be restored condition.

 

c. Reduce the size of the circuit protection component

Will overload and short circuit protection with an integrated capacitor delay for the protection of the IC inside to reduce the size of circuit protection components?

 

5, the protection requirements of IC performance

 

a. Overload protection, high accuracy

When the lithium-ion battery charging excessive state to avoid a temperature rise caused by increased internal pressure required for the threshold state of charge. Protection IC detects the cbattery voltage, when the overcharge is detected, then detection of over-charging power MOSFETs in order to cut the load threshold. At this point should be noted that over-voltage detection burden of high precision, battery charging, battery to a state is a danger of the user, taking into account security issues and should enable the voltage when the threshold state of charge. To simultaneously satisfy these two conditions, there must be a detector of high precision, accuracy of 25mV current detector, the accuracy will be improved.

 

b. In order to reduce IC power consumption to protect

With the increasing use of time was enough lithium power-voltage ion battery will gradually diminish the value of the last low specifications below, this time need to recharge. If you do not charge for continued use, may lead to excessive battery discharge Ershi is not used. To avoid too much discharge protection IC to detect the battery voltage, over-voltage detection of the landfill once they reach the following, you must cut the discharge of MOSFET power and the threshold discharge. But this time, the BATCL50L battery itself, there are still protecting the natural discharge and IC current consumption exist, therefore the need to protect the IC power consumption to a minimum.

 

c. Protection against overcurrent / short-circuit the need for low-voltage detection and precision requirements

Short circuits due to unknown causes must immediately stop selling them. Over-current detection is based on power MOSFET RDS (on) for the impedance of induction to follow the voltage drop of blood at the time when compared with a voltage-current detection is also high at namely, to stop selling them. To MOSFET’s Rds (on) in the current charge and discharge current is the effective use of time is needed for the impedance as low as possible, at present the impedance is approximately 20mΩ ~ 30mΩ, if the voltage-current detection may be lower.

 

d. Resistant to high voltage

Battery and charger to connect the instant the pressure will be generated if the protection must meet the requirements of high voltage IC.

 

e. Low VGP-BPS2B battery consumption

In the protection of the state, its current consumption of 0.1μA rest must be small.

 

f. Zero-Volt Rechargeable

Some batteries may be stored in the process because it takes too long or unusual causes of tension as low as 0V, and therefore need to protect the IC can be achieved when 0V load.

 

6, the protection IC Prospect

 

As mentioned previously, the future protection of integrated circuits should further enhance the detection voltage accuracy and reduce current consumption to protect and improve the CI function to prevent malfunctions and so on, and the charger to connect the terminal High voltage is also the focus of research and development. In the package, at present has been a gradual shift SOT23-6 package SON6 the future, there are CSP package, even COB products to meet the requirements highlighted in a word, light.

 

In functions, protect the IC does not require integration of all functions, according to different materials, to develop a single lithium Dell Latitude D830 battery protection IC, the coverage only if overloaded or over-discharge protection, which can significantly reduce the cost and size.

 

Of course, the functional components is a single crystal of the same goals, such as manufacturers of mobile phones today have been directed towards protecting the IC, charging circuit and power management IC, and other peripheral circuits and logic is a two chip chipset, but rather of power MOSFET’s open reduction of impedance of the circuit is difficult to integrate with other IC, even if it is made of a special single-chip technology, I fear the cost is too high. Therefore, protection of single crystal integrated circuits should take some time to resolve.