Deterioration state detection apparatus and deterioration state detection method for energy storage device, and energy storage system
AssigneeGS Yuasa International Ltd.
InventorsYuichi Ikeda, Yohei Tao, Shigeki Yamate
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Abstract
A deterioration state detection apparatus for detecting a deterioration state of capacity enabling charge or discharge of a nonaqueous electrolyte secondary battery includes: an acquisition unit that acquires a capacitance of the nonaqueous electrolyte secondary battery: and a determination unit that determines the deterioration state of capacity enabling charge or discharge of the nonaqueous electrolyte secondary battery, from change of the acquired capacitance.
Claims13
A deterioration state detection apparatus for detecting a state before performance degradation, which is a state right before a rapid performance degradation of a nonaqueous electrolyte secondary battery, comprising:
- an acquisition unit that acquires a capacitance of the nonaqueous electrolyte secondary battery;
- and
- a determination unit that determines whether or not the nonaqueous electrolyte secondary battery is in the state before performance degradation as a deterioration state of capacity enabling charge or discharge of the nonaqueous electrolyte secondary battery, from change of the acquired capacitance,
- wherein the determination unit limits a charging upper limit voltage of the nonaqueous electrolyte secondary battery or an energizing maximum current to the nonaqueous electrolyte secondary battery based on a determination result of the deterioration state of capacity enabling charge or discharge of the nonaqueous electrolyte secondary battery.
A deterioration state detection method for detecting, by using a computer, a state before performance degradation, which is a state right before a rapid performance degradation of a nonaqueous electrolyte secondary battery, comprising:
- an acquiring step of acquiring a capacitance of the nonaqueous electrolyte secondary battery;
- a determining step of determining whether or not the nonaqueous electrolyte secondary battery is in the state before performance degradation as a deterioration state of capacity enabling charge or discharge of the nonaqueous electrolyte secondary battery, from change of the acquired capacitance;
- and
- a limiting step of limiting a charging upper limit voltage of the nonaqueous electrolyte secondary battery or an energizing maximum current to the nonaqueous electrolyte secondary battery based on a determination result of the deterioration state of capacity enabling charge or discharge of the nonaqueous electrolyte secondary battery.
An integrated circuit for detecting a state before performance degradation, which is a state right before a rapid performance degradation of a nonaqueous electrolyte secondary battery, comprising:
- an acquisition unit that acquires a capacitance of the nonaqueous electrolyte secondary battery;
- and
- a determination unit that determines whether or not the nonaqueous electrolyte secondary battery is in the state before performance degradation as a deterioration state of capacity enabling charge or discharge of the nonaqueous electrolyte secondary battery, from change of the acquired capacitance,
- wherein the determination unit limits a charging upper limit voltage of the nonaqueous electrolyte secondary battery or an energizing maximum current to the nonaqueous electrolyte secondary battery based on a determination result of the deterioration state of capacity enabling charge or discharge of the nonaqueous electrolyte secondary battery.
Dependencies are inferred from the claim text.