CPC G01R 31/396 (2019.01) [G01R 31/3646 (2019.01); G01R 31/3648 (2013.01)] | 19 Claims |
1. A battery device, comprising at least two battery units, wherein a difference between characteristic values of any one of the at least two battery units is controlled within a preset range,
wherein the preset range is 0.5% to 40%,
wherein each one of the characteristic values is obtained by adopting a following test:
when any one of the at least two the battery units is discharged at a discharge rate of 0.05 Capacity (C) and a discharge rate of 1C respectively in a discharge voltage interval of 2.8 Volt (V) to 4.2V, obtaining two discharge differential voltage analysis (DVA) curves, and determining a difference between minimum values of the two discharge DVA curves to be as a characteristic value of one of the at least two battery units.
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