Abstract: A current collecting board includes a base board, a conductive board mounted on the base board, a number of conductive plates, and a number of security elements. The base board includes a first surface, a second surface, and a number of receiving protrusions extending upwardly from the first surface. The base board defines a number of first through holes, each receiving protrusion surrounds a first through hole. Each conductive plate defines a second through hole. The receiving protrusion includes a number of leading blocks and a number of clamping blocks; each conductive plate is received in a receiving protrusion and clamped between the leading blocks and the clamping blocks. One end of each security element is solder to and electrically connected to a conductive plate, the other end of each security element is soldered to the conductive board. A battery module using the current collecting board is also provided.

Abstract: The present invention provides a voltage acquisition circuit. The voltage acquisition circuit includes a voltage division and sampling module, a voltage to frequency conversion module, and an isolation module. The voltage to frequency conversion module is electrically coupled to the voltage division and sampling module and the isolation module. The voltage division and sampling module is configured to divide and sample a total voltage of a battery pack, and output a voltage signal to the voltage to frequency conversion module. The voltage to frequency conversion module is configured to convert the voltage signal into a first frequency signal, and output the first frequency signal to the isolation module. The isolation module is configured to electrically isolate the first frequency signal, to generate a second frequency signal. The present invention further provides an electric vehicle with the voltage acquisition circuit.