Charging method of non-aqueous electrolyte secondary battery, and charging system of non-aqueous electrolyte secondary battery
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMasahiro Soga, Taisuke Yamamoto
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Abstract
A charging method of a non-aqueous electrolyte secondary battery involves a first charging step in which, defining x as the ratio of the capacity of a silicon compound to the rated capacity Q(0.1≤x≤0.5), a battery capacity Q1st that satisfies the expression below is charged at a first fixed current value; and a high current charging step in which, after completion of the first charging step, charging is performed at a fixed current value higher than the first fixed current value. 0.38x+0.063−α≤Q1st/Q≤0.38x+0.063+α Expression
Claims3
A charging method of a non-aqueous electrolyte secondary battery comprising a negative electrode including a carbon material and a silicon compound as a negative electrode active material, comprising:
- a first charging step of charging a battery capacity Q1st satisfying an expression described below at a first constant current value, when a ratio of a capacity of the silicon compound to a rated capacity Q is x (0.1≤x≤0.5);
- and
- a large current charging step of charging at a constant current value larger than the first constant current value, after an end of the first charging step,
- the expression being:
- 0.38x+0.063−α≤Q1st/Q≤0.38x+0.063+α
- wherein α=0.1.
Dependencies are inferred from the claim text.