Abstract: The present application relates to an online detection method for internal short-circuit of power battery, which comprises the following steps: in the process of charging and discharging, when the state of charge of a power battery is greater than a preset first threshold, monitoring and recording the voltage for each cell in the power battery; in accordance with the recorded historical voltages of each cell, determining whether there is a cell with voltage less than a second threshold in the process of charging, and less than a third threshold in the process of discharging, if so, then marking the corresponding cell as an internal short-circuited cell. The present application could accurately determine whether a malfunction of internal circuit of power battery occurs during the operation of a vehicle, so as to guarantee the safety of the vehicle and the people on-board.

Abstract: The present application relates to an online detection method for internal short-circuit of power battery, which comprises the following steps: in the process of charging and discharging, when the state of charge of a power battery is greater than a preset first threshold, monitoring and recording the voltage for each cell in the power battery; in accordance with the recorded historical voltages of each cell, determining whether there is a cell with voltage less than a second threshold in the process of charging, and less than a third threshold in the process of discharging, if so, then marking the corresponding cell as an internal short-circuited cell. The present application could accurately determine whether a malfunction of internal circuit of power battery occurs during the operation of a vehicle, so as to guarantee the safety of the vehicle and the people on-board.