Digital battery

Laptops are becoming more frequent, then it is probably the most finicky of the battery, so as to provide some knowledge basis for your machine you: 1. Single lithium-ion batteries are usually rated voltage of 3.7 V 【some manufacturers nominal 3.6 V, is the same. Voltage lithium-ion operating range: 2.75 ~ 4.2V】 …

  

Notebooks are now more common, although it is probably the most finicky of the battery, so as to provide some basic knowledge to you the machine you:

 

1. Single lithium-ion batteries are usually rated voltage of 3.7 V 【some manufacturers nominal 3.6 V, is the same. Voltage lithium-ion operating range: 2.75 ~ 4.2V】, Laptop battery for several general series and parallel structures.

 

2. Currently used in models of laptops batteries: 18650 【diameter 18mm, height 65mm】 cylindrical batteries, generally rated 2000mAh. Some rated 2200mAh, this nominal level and battery manufacturers have produced a beautiful relationship.

 

3. Usually called 6-cell battery, ie two or three structures channel (voltage series are added, the total capacity in parallel), the tension is to know 11.1V, Capacity 4000mAh (or 4AH) 9 battery cell as follows: 3 strings 3 and which is, 11.1V, 6000mAh, 4-cell battery as follows: four strings, which is 14.8V 2000mAh.

 

4. As lithium-ion battery recharges volatile situation, and use lithium-ion battery circuit protection must exist (to avoid the charge, over discharge). Protection circuit directly affects the quality of the safety performance of the IBM ThinkPad T42 battery and the battery life.

 

5. Lithium-ion batteries are not able, like nickel-metal hydride batteries, or dry, as a direct serial or parallel, must be adopted before the series, the ability to compare in parallel, voltage, resistance and other parameters of electrical performance, conducted with groups. This is a group of several performance parameters of single cell battery should be no difference. Consistency of performance parameters of most direct impact on battery life.

 

6. Protection circuit comprises: an overload on-chip discharge protection, and the balance of resistance and some electronic components. Protection circuit design and component quality is also very important. Circuit protection in case of problems, the Dell Inspiron 1526 battery does not work correctly. From the battery to the hospital (Maintenance Center), the emphasis has been scrapped.

 

7. We are very concerned about: the attention of the battery

 

A battery must be charged from 12 last three-hour claim is false. There is no need to explain. Error source: mobile phone batteries.

 

B using the AC adapter is best not to disconnect the battery. Reason: The battery is fully charged, the protective role of circuit protection, power adapter current is no longer a battery, the hp 367759-001 battery has no charge. Do not pull the battery can protect your computer (a sudden power failure situation).

 

C battery temperature must not exceed 55 degrees. Do not lower than -20 degrees temperature. This range of temperatures, the battery can function correctly.

 

D battery life factors have maximum impact on the battery with differences in group performance when the single battery to protect the quality of the circuit, the battery inside the anode and cathode materials and the electrolyte. The current technology of the sony VGP-BPS2A battery is relatively mature, the last principle can be ignored.

 

Such is the life of the battery when the factory decided. However, every book of the battery is not the same.

 

8. By the way: Now that some cells are not marked “rated capacity”, but what is the subject of Wh (watt hour)

 

This may be converted there. W = V × A, which is Wh = V * A * h, Wh divided by the nominal voltage is equivalent to the capacity (Ah).

9. And then he added: Lithium-Ion batteries self-discharge phenomenon is that you use or not, he will always have a capacity of an irreversible decline. The amount of attenuation, depending on the quality of various manufacturers, not the same attenuation.

 

10. Go on GB/T18287-2000 defined above, maintaining the toshiba PA3285U-2BRS battery: long-term do not use the battery when the battery should charge around 50% of electricity storage, and every 6 months during load and unload time, and costs 50% of electricity storage. This and GJB GJB4477-2002 is the same as above.

 

11. Estimated Market Price: 1 18650 batteries about 20 yuan, a protection circuit is about $ 80 (price differences broader general, prices of 80), injection molding shell cost of about 3 yuan. Therefore, the cost of the order of 6-cell battery: 20 × 6 80 3 = 123 yuan.

 

12. Some people say that since the battery is at the heart of 18650, so I went to the market to buy some of the 18,650 batteries, replace old batteries, the battery is new it?

 

This is false. I started to think, but chatted with an electronic engineer after understanding. The protection circuit of origin in the cell performance storage chip, which is, for each of the previous capacity of battery internal resistance and other information are stored in the chip. After changing the batteries have to brush the information from memory chips to a normal battery. Brush chips are aspects of the information, I do not know much. Initially, I intended to use the apple PowerBook G4 12 inch battery in my laptop a year later, a few self-produced batteries, and obviously we need to find someone else to chip brush and working properly .

 

13. According to the development of lithium-ion battery industry is currently the largest capacity of 18650 cylindrical battery is reached (2900mAh little devils Japanese society, I hated the Japanese, I will not write the name of the Company), a small Japanese devils most companies have been suffering for more than 2600mAh. 2200mAh domestic firms still soar. Therefore, the market there are lots of laptop BATCL50L battery nominal capacity of 5200mAh ~ 5600mAh is normal, the standard 5800mAh is more upscale.

 

Also: batteries for Apple laptops have all been the use of polymer batteries (eg, dimensions can be custom made). Therefore, we examine the capacity of batteries for Apple laptops can be made, and the other to compare.

 

Here will not help Apple’s advertising, and stop there.