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Panasonic battery capacity identification method

At present, Panasonic battery capacity has the following marking methods, such as C20, C10, C5, C2, respectively, that the actual capacity is 20h, 10h, 5h, 2h.If it is the capacity at 20h discharge rate, it should be marked as C20, C20=10ah battery, that is, c20/20 current discharge 20h obtained capacity value. Conversion to C5, that is, C20 current 4 times the discharge, capacity is only about 7ah, electric bicycle generally in 1~ 2H large current discharge.

Panasonic battery 1~2h(C1~C2) discharge, close to the specified current 10 times, its actual energy is only 50%~54% of the DISCHARGE capacity of C20. Panasonic battery capacity is marked C2, which is the capacity marked at 2h discharge rate. If not C2, it should be calculated to obtain the correct discharge time and capacity. If the 5h discharge rate (C5) labeled capacity is 100%, if the discharge is changed to within 3h, the actual capacity is only 88%; After 2 hours internal discharge, only 78%; After discharging within 1h, only 65% capacity is left at 5h. The capacity of the tag is assumed to be 10ah.

At present, only 8.8 Ah of actual power can be obtained from a 3h discharge; If 1h discharge, only 6.5ah power can be obtained, reduce the discharge rate at will. Discharge current >0.5C2 is not only less than the labeled capacity, but also has a certain impact on the service life of Panasonic batteries. Similarly, for cells labeled (rated) as C3, the discharge current is C3/3, i.e., ≠0.333C3. For C5, the discharge current should be 0.2C5.

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