Method for recovering capacity of alkaline secondary battery
By employing a high-rate charging method in the high SOC region, setting the charging termination SOC and estimating the positive electrode capacity, the valve opening problem caused by overcharging of nickel-metal hydride batteries is solved, the positive electrode capacity is restored, and the battery output is improved. This method is applicable to the capacity recovery of nickel-metal hydride batteries.
CN115347249BActive Publication Date: 2026-06-26TOYOTA BATTERY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TOYOTA BATTERY CO LTD
- Filing Date
- 2022-02-11
- Publication Date
- 2026-06-26
Smart Images
Figure CN115347249B_ABST
Abstract
The present application relates to a capacity recovery method for an alkaline secondary battery. In the capacity recovery method for an alkaline secondary battery, the recovery charging of an alkaline secondary battery having a positive electrode containing an active material having nickel hydroxide as a main component and an electrolyte containing an aqueous potassium hydroxide solution is performed using a charge-discharge device and a control device that controls the charge-discharge device, and includes a high-rate charging step and a high-rate discharging step. The high-rate charging step charges at a high charging rate in a high SOC region that is a region in which the SOC is higher than a shortest length SOC that is the SOC of the alkaline secondary battery in which the c-axis length of the nickel hydroxide is the shortest. The high charging rate is a charging rate that is higher than a low charging rate in a low SOC region in which the SOC is lower than the shortest length SOC.
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