Analyze lithium battery capacity units and test methods

Lithium battery capacity refers to the amount of electricity it holds. The unit is usually "Ah" and "MAH". For example, the lithium battery capacity is 500mAh, which means that if the battery current is 10mA, it can work continuously for 50 hours.

Lithium battery capacity unit

Usually we say that the battery capacity is in ampere-hours, which is based on a certain lithium battery that has been identified. For example, we say the capacity of this mobile phone lithium battery; the battery capacity of this battery car is different for different batteries. For the battery voltage has been determined, without considering the actual voltage, it is only necessary to say that the battery capacity can be represented. However, for batteries of different voltages, we can't simply use Anshi to represent the capacity, such as a 12V-20AH battery, a 15V20AH battery, even 20AH, supply the same power load, the equipment can work normally, but continue The time is different, so the standard capacity should be in work.

Lithium battery capacity unit

For another example, a device can support 12V and 24V. It can be powered by a 12V (20AH) battery and can provide one hour. Then two series will become 24V (20AH). The time will be doubled, so the capacity should be considered as the work contained in the battery at this time, and it should not be considered simply. Look at the following formula: W (work) = P (power) * T (time) = I (current) * U (voltage) * T (time). This discussion of battery capacity has practical significance. Otherwise there may be a saying that a mobile phone battery is larger than the battery capacity of the battery car, which is obviously unscientific.

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