Battery pack

The utility model discloses an external cooling battery pack. The battery pack comprises a battery box body, a heat conduction bracket, a first battery module, a second battery module and a heat dissipation assembly, the heat conduction support is installed in the battery box body, and a limiting cavity is formed between the inner wall of the heat conduction support and the bottom wall of the battery box body. The first battery module is arranged on the upper surface of the heat conduction support. And the second battery module is arranged in the limiting cavity and is connected to the bottomwall of the battery box body. And the heat dissipation assembly is arranged outside the battery box body. According to the embodiment of the utility model, the heat dissipation assembly is placed outside the lower box body, the technical problem that a battery pack may be exploded due to liquid leakage of cooling liquid can be effectively solved, and the mounting bracket capable of conducting heatis placed between the fir