Charging system for non-aqueous electrolyte secondary batteries

Abstract

The present invention provides a method for charging a nonaqueous electrolyte secondary battery which is provided with a negative electrode containing a carbon material, the method enabling charging with high efficiency, while ensuring good cycle characteristics. A method for charging a nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure is a charging method for a nonaqueous electrolyte secondary battery that is provided with a negative electrode which contains a carbon material as a negative electrode active material; and this method comprises a switching step wherein the control temperature of the nonaqueous electrolyte secondary battery is switched from a high temperature to a low temperature.

Claims

1. A charging system for a non-aqueous electrolyte secondary battery, comprising a negative electrode containing a carbon material as the negative electrode active material, A switching step is performed to switch the control temperature of the non-aqueous electrolyte secondary battery from a high temperature to a low temperature. The switching step is performed when the state of charge (SOC) of the non-aqueous electrolyte secondary battery is in the range of 30% to 60%. A charging system for a non-aqueous electrolyte secondary battery.

2. The charging system for a non-aqueous electrolyte secondary battery according to claim 1, wherein the negative electrode further comprises a silicon compound as a negative electrode active material.

3. The charging system for a non-aqueous electrolyte secondary battery according to claim 1 or 2, wherein the high temperature is 35°C or higher and 60°C or lower.

4. The charging system for a non-aqueous electrolyte secondary battery according to any one of claims 1 to 3, wherein the low temperature is 0°C or higher and less than 35°C.

5. A charging system for a non-aqueous electrolyte secondary battery according to any one of claims 1 to 4, comprising a charging control device that performs a switching step of switching the control temperature of the non-aqueous electrolyte secondary battery from a high temperature to a low temperature.

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