Lithium battery capacity test

Core parameters capacity lithium battery, lithium battery manufacturers generally have specialized equipment for testing to ensure the quality of goods, but for average users, how do you know his new lithium-ion battery capacity is not qualified?
Here is a simple test method: multi-meter test method.
1000mAh Lithium ion battery are examples (outside of lithium-ion batteries and multi-meters, here, are planning a charger)
First of all to understand theoretically what lithium battery voltage values:
1.Charging voltage: voltage, that is, not working the maximum voltage, typically 4.2V 
2.Work / Nominal voltage: load voltage working voltage is generally 3.7V 
3. He final discharge voltage: the voltage of the battery does not work, have 3V 2.75V Different designs.
To begin testing the battery with a charger, full power voltage 4.2V And constant current load with multi-meter, 0.2C (That is, 1000 × 0.2=200mA ) Discharge set the multi-meter voltage as 3V If the discharge time 5 An hour or two it means the battery is qualified. Now lithium-ion batteries can discharge to the 2.75Vand previous 3V voltage discharge depth is 80%, it can be placed into 8 hours indicate the power of lithium-ion batteries has increased.
0.2C Is an international standard test method, in fact usually used 0.5C The test, in this case, set the multi-meter to 500 mA Constant current load reached 3V voltage can be more than two hours to pass.
These so-called qualified fail is relatively nominal capacity. Nominal capacity = discharge current x time. If the discharge time is not enough, that li ion battery are labeled capacity 1000mAh, this deficiency is a capacity for consumers is a trick.
Contact:
Person: Tim.lee
Company: Dongguan Large Electronics Co., Ltd
Add: Block A, Gaosheng Technology Zone, Nancheng District, Dongguan City, Guangdong Province, CN
Tel: 86-769-23182621
Email: Tim.lee@largepower.cn

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