A battery module is provided including a battery unit that includes a battery top cover; a temperature measurement unit, including a temperature collection element to collect temperature of the battery top cover; a harness plate, arranged on the battery top cover and including a harness plate body and a limiting structure arranged on the harness plate body, wherein the limiting structure is matched with the temperature measurement unit; a circuit board, arranged on the harness plate and including a circuit board body and an extending strip arranged on the circuit board body, wherein the temperature collection element is connected with the extending strip; and an electrical connecting sheet arranged on the harness plate to connect different battery units, wherein the temperature measurement unit is arranged between the electrical connecting sheet and the battery top cover, and the electrical connecting sheet exerts pressure onto the temperature measurement unit.