CPC G01R 31/392 (2019.01) [G01R 31/367 (2019.01); G01R 31/396 (2019.01); H01M 10/48 (2013.01); H01M 10/625 (2015.04)] | 5 Claims |
1. A degradation determination device for a secondary battery, the degradation determination device being used for a hybrid vehicle and configured to determine degradation of the secondary battery, the hybrid vehicle including: an engine configured to output power for travel; a motor configured to output power for travel; the secondary battery that is configured to supply electric power to the motor; and a control device configured to execute travel control in which the engine and the motor are controlled such that the hybrid vehicle travels while adjusting a fuel injection amount of the engine based on an accelerator operation amount,
the degradation determination device comprising:
a controller configured to determine degradation of the secondary battery based on data of a third parameter in a predetermined period, the third parameter being a difference between:
a first parameter reflecting required power which is based on the accelerator operation amount; and
a second parameter reflecting power output from the engine which is based on the fuel injection amount.
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