About car battery charge and test
Car batteries are mostly lead-acid batteries, not only can supply large currents, but also the lowest cost of the cell mechanism of chemical reaction. Lead acid batteries can withstand a long period of routine maintenance load, it will often be the traditional “floating” (floating) Food found in its tracks, like the system of uninterruptible power supply or lighting of urgency. Moreover, gaps in the lead-acid VGP-BPS5 VGP-BPS9A battery is the most important weight unit or per unit volume of the storage density of the lowest energy. Large commercial applications, the chemistry of the battery the next step should be to lithium-polymer reaction, it is an attractive technology because it allows the battery became a sheet of flexible polymer, sandwiched between the cathode and anode materials between. This function opens the door to an application, companies will eventually be made into any shape of the battery; In addition, the management point circuits to the battery, the vast majority of the nature of the polymer lithium and lithium-ion chemistry are the same. Charge and discharge charge and discharge of the battery chemistry will affect mainly manifested in the capacity of the storage battery, the general is “amp hours” to represent the carrying capacity battery ( Lithium-ion batteries used most often are “Wh” is because the units of the battery voltage lithium-ion battery is higher, making the importance of the ability of energy storage capacity that Current storage.) recharging the battery, it is still the battery voltage, current and temperature to set certain conditions to be protected, if the acceleration with the load, then the battery status will be faster and force these protected conditions, leading to it can accept power, but declined. Similarly, if the rate of discharge of the battery faster then the voltage drop exceeds the rate of strengthening capacity to reduce the rate, causing the battery to the actual working hours than the prescribed amount of time discharge is shorter. Dell Inspiron 1501 battery Dell Inspiron 1520 battery Thus, compared to a slower rate discharge applications, applications of high discharge rate (such as power tools) would require an element of compensation totally different to fully compensate for this phenomenon. As the battery storage of energy and energy supply are the loading rate and rate functions of discharge, therefore, may be “C” to represent these rates, it is operated current size (in amps) divided by enhancing the total capacity (ampere-hours) results; For example, if the rejection rate of 1C, said that the time will be able to save the battery power exhausted. The time required for charging the original C rates that much longer, because the efficiency of the battery may reach 100 percent, but will continue with different types of change batteries, nickel hydride batteries metal of 80% lithium ion rechargeable alkaline batteries at 100% or more. Effects of temperature on the temperature of the battery if it is more a difference of 25 ℃, then build the capacity of batteries, carrying capacity, shelf life and the life cycle would be reduced more. In general, the battery discharge rate increases with increasing temperature, approximately every 10 ℃ will be doubled. In addition to nickel-cadmium batteries (which would be responsible for a chemical reaction is an endothermic reaction), and other battery charging, the temperature will rise if use of over-pricing method, then the rate of Warmer temperatures will accelerate. Among the nickel-cadmium batteries are generally the use of dT / dt to the suspension conditions of fast charge, which represents the temperature from the rate of change. As the temperature increase of the battery when the electrolyte resistance is reduced, then so do not check the F3172A PB995A battery charging algorithm for temperature, then decrease as the electrolyte resistance, the load current will increase , causing the battery temperature continues to rise and form a path of positive feedback from danger, this situation called “thermal runaway” (thermal runaway). Stability charger battery charging (Charger net) to upload the most conservative does a “stability” (trickle) charging phase, as long as the battery and charger connected, it will be specified by the manufacturers ’standard’ rate of loading (usually around C/10) continue to charge the battery. The charger should not be the direction he will not use the battery monitor or timer to stop the charge, so that the least cost. Rapid Charger (quick charger) rate Fast charge of about C / C or 3 / 4, the battery charging time can be shortened to 4 or 5 hours. Quick Charger is generally controlled by a timer, time to stop charging n ‘ is not necessary to use other battery monitor. While this technique can reduce the cost of the charger, but the manufacturer must take into account, so that the battery is full power in the circumstances, able to withstand complete cycle of over-pricing, so if the user does not care power of a full battery recharging, the battery will not cause damage. Quick charge battery structure slightly different from that of normal cells, their internal structure will be made relatively large so as to absorb the excess gas produced during charging. High-speed charger (quick charger) to speed the loading rate is usually 1C or 2C, but some manufacturers have introduced a number of rechargeable batteries at rates up to 4C. As the case of over-charge the batteries may cause great damage, so you must use a “smart” (smart) charger, which must monitor the state battery, while providing a very stringent “condition of charge termination. Smart charger included in the circuits involved, in addition to controlling the charging process is responsible to provide three functions: the battery state regulation, charge the PA3395U-1BRS PA3399U-1BAS battery before the start of the identification and ensure that the process of charging by the security set. Battery state regulation when the battery used for a period of time, the reaction is the formation of some crystals on the surface will impede the conduct of prosecution, some of crystallization is that the method of real contact would be removed. However, by electrical effects, there are no reliable way to eliminate these crystals can be used electrical methods. If the user so that the battery is properly managed to avoid an overload for scenarios (and in some chemical mechanism are also included in the excessive discharge) and compared the abuse of the battery, the former deputy -product of the cumulative rate of secondary reactions will be relatively slow, and the work temperature is relatively low, which does not only extend the life cycle of the battery, but also the high capacity storage battery maintain a longer period of time. To-nickel cadmium, with the greatest capacity, there is a very useful electric mode of operation. Nickel-cadmium batteries will be “memory effect” is when the current through the nickel cadmium batteries have been charged in the storage area, they will change the crystalline structure of the phase state of the region. In this new phase state, in terms of stored energy or release energy during the reaction, and receive a lower voltage. Nickel-cadmium batteries to power if the first version, you can reverse-charge region of chemical reaction, and would return to the normal crystalline structure, it can eliminate the memory effect of battery. For nickel-cadmium batteries, the charge before the action of discharge is a useful step in the charge before the adjustment. Identification of the cell identification of the battery to determine battery state of normal, acceptable load. IBM ThinkPad T43 battery IBM ThinkPad T60 battery
We can open the battery and short circuit test: In the open circuit test, plus a voltage across the battery, then adjust the voltage for the battery current minimum test in short-circuit then let the battery with a current, then adjust the size of this current for the battery voltage minimum. In general, during the test imposed by the voltage or current does not exceed half the load value at high speed. On the other hand, manufacturers specify a temperature range of pricing, the action of load can be performed in this temperature range. While manufacturers of integrated battery thermistor while before driving at high speed loading, you may want to check the temperature limits. In addition, if the battery has been over-charging, it should not re-charge, if a battery has published a lot of power, and not appropriate to pay a higher rate, it should not re-high speed loading . Identification of the failure of the battery there are several approaches to exclude short-circuit or open circuit failure, the battery replacement is the only way. If problems with temperature or voltage, then the shipper May BE access to “break load” (loading) state, waiting for conditions to return the battery related to the extent permitted by. If the battery voltage is too low, then the adjustment phase of the battery, charger generally adopt stable pricing, which allows the voltage of backup battery charging high speed allowed by the minimum voltage. A complete charging solution that can contain a maximum of four parts: the algorithm for high speed broadband loading loading pricing conditions for the completion of the suspension (top-off) algorithm to conduct the interview A1012 A1060 battery acid charging algorithm in the world of high speed phase load, also known as “many leaders” (bulk load) phase, used for fast charging the battery; Whether reserve running the battery at least? High-speed loading phase of what should be in time to stop? These are the conditions of the suspension load at high speed to select the appropriate basis for judging. The nickel - hydride batteries, metal, when the cycle of high load velocity due to temperature or voltage limit must be stopped, usually there will be 5%-20% of electricity has not yet completed, the charger will continue to use a loading rate of the smaller “charging” phase complete (high-speed loading rate of 1 / 5- 1 / 8. Ni-MH battery charging is complete. In general, this charge will be for a period of time fixed for completion. Then it is loaded by a maintenance phase or a stage of “floating” (float phase) to compensate for battery self-discharge rate, so that the battery will maintain the condition of full power.