Simplo Technology Company, Ltd.

Je-Feng Li

This disclosure provides a state estimation method and a battery pack. The method includes: obtaining aging factor data, predetermined discharge data and predetermined capacity loss changing data; recording measured discharge data of a to-be-measured battery; calculating to obtain discharge voltage difference data according to the predetermined discharge data and the measured discharge data; determining a specific interval Sa according to the discharge voltage difference data, and obtaining a voltage difference statistical value &#x394;Vin the specific interval Sa; calculating an estimation capacity loss &#x394;Qof the to-be-measured battery according to the aging factor data and the voltage difference statistical value &#x394;V; and determining whether the to-be-measured battery is abnormal or not according to the predetermined capacity loss changing data and the estimation capacity loss &#x394;Q.

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Hsinchu County, Taiwan

Je-Feng Li