Introduction of alkaline battery capacity detection method

The alkaline battery capacity is detected in the same way as other primary batteries, but unlike rechargeable batteries. Constant-resistance discharge is generally used, that is, the battery is discharged in series with a resistor of a specified resistance value, and then measured by the discharge time when the discharge voltage drops to a certain voltage value (usually 0.9 V). Therefore, the alkaline battery capacity has long been expressed by the discharge time.

When detecting the discharge time of alkaline batteries, there are generally two discharge modes of 3.9 Ω and 10 Ω, and both methods use 0.9V as the termination voltage. The following is an example of the alkaline batteries of No. 5 and No. 7 in Dongguan, which need to be explained. The test method for the alkaline battery capacity of Dongguan University is to obtain the following data through the same device parameter debugging, so the discharge current is balanced of.

1. LR03 alkaline battery (No. 7): discharge in a 3.9Ω discharge mode for about 2.6 hours; mode discharge time of a 20Ω discharge is 18.5 hours. If you switch to 500mA current, the time is about 55 minutes.

2. LR6 alkaline battery (No. 5): discharge for 6.7 hours in 3.9Ω discharge mode and 19.7 hours in 10Ω discharge mode; if it is switched to 1000mA current discharge, the time is about 54 minutes.

If the alkaline battery capacity is to be measured by ××mAh, the discharge current will be involved here. The alkaline battery capacity has a great relationship with the discharge current. The capacity discharged at a small current is larger than the capacity discharged under a large current a lot bigger, because the alkaline battery capacity will drop sharply under high current. Under normal circumstances, the normal aa alkaline battery has a small current discharge capacity of approximately 1800-2200 mAh. The normal aaa alkaline battery has a small current discharge capacity of approximately 900 to 1200 mAh.

It can be seen from the above analysis that the method for detecting the capacity of the alkaline battery is a constant resistance discharge, and the actual alkaline battery capacity is also greatly related to the discharge current. Therefore, for an alkaline battery, the alkaline power battery capacity measured by the discharge time must explain the discharge system.

The page contains the contents of the machine translation.