Therefore, an object of the disclosure is to provide a device and a method for estimating a state-of-health of a battery module, and the device may alleviate at least one of the drawbacks of the prior art. According to the disclosure, the device includes a control module, a correction module and a processing unit. The control module is disposed to receive information associated with a state of the battery module. When the battery module is being charged, the control module outputs, immediately after a beginning of a predetermined testing period at which the charging of the battery module has reached a predetermined target, a control signal for controlling a battery current flowing through the battery module to have a predetermined current value for the predetermined testing period, such that a battery voltage of the battery module decreases during the predetermined testing period. The correction module is disposed to receive information associated with a temperature of the battery module, is coupled to the control module for receiving the control signal, and is configured to be triggered by the control signal to acquire a voltage correction value according to a temperature value of the battery module during the predetermined test period. The processing unit is disposed to receive information associated with the battery current and the battery voltage, is coupled to the control module and the correction module for receiving the control signal and the voltage correction value respectively, and is configured to be triggered by the control signal to acquire a current variation value and a voltage variation value of the battery module during the predetermined testing period, to correct the voltage variation value based on the voltage correction value, and to estimate the state-of-health of the battery module according to the voltage variation value thus corrected, the current variation value, and a rated capacity of the battery module.

Applied Country	Category	專利狀態	證書號	專利權期間	研究成果公告日期
TW	Elecric vehicle technology	獲證	CN108614216B	2020/12/25~2036/12/11
CN	Elecric vehicle technology	獲證	CN108614216B	2020/12/25~2036/12/11
US	Elecric vehicle technology	獲證	CN108614216B	2020/12/25~2036/12/11