CPC G01R 31/374 (2019.01) [B60R 16/04 (2013.01); G01K 3/02 (2013.01); G01K 7/00 (2013.01); H01M 10/48 (2013.01); H01M 10/486 (2013.01); H02J 7/007 (2013.01)] | 9 Claims |
1. A chargeable battery temperature estimation apparatus estimating an internal temperature of a chargeable battery, the chargeable battery temperature estimation apparatus comprising:
a processor; and
a memory storing instructions executable by the processor,
wherein the processor performs the following when executing the instructions stored in the memory:
acquiring a detected current value output from a current sensor configured to detect a current flowing in the chargeable battery;
calculating a heating value on the basis of the detected current value, the heating value estimating heat generated inside the chargeable battery;
acquiring a detected external temperature value output from a temperature sensor configured to detect an external temperature of the chargeable battery;
estimating the internal temperature of the chargeable battery based on the calculated heating value and the detected temperature value; and
outputting the estimated internal temperature,
wherein in calculating the heating value, the processor estimates, as the heating value, a sum of heat amounts of Joule heat and chemical reaction heat generated inside the chargeable battery by multiplying the detected current value by a coefficient α, and
wherein in estimating the internal temperature, the processor performs the following:
calculating a difference value between the detected temperature value and a previously estimated value of the internal temperature that has been previously estimated, and performs a proportional operation on the difference value,
performing an integral operation on an added value of the heating value and the difference value, and
adding together values obtained through the proportional operation and the integral operation.
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