POWER BATTERY SYSTEM AND ITS PRESSURE RELIEF ASSEMBLY

A power battery system and its pressure relief assembly are provided. The power battery system further includes a plurality of battery modules. The battery module is internally provided with a pressure relief cavity and at least one cell. The pressure relief assembly includes a guide pipe and an explosion-proof valve. The guide pipe includes provided with a plurality of flow-collecting sections and at least one converging section. The plurality of flow-collecting sections are respectively in communication with the pressure relief cavities of the plurality of battery modules. The flow-collecting section is respectively in communication with the pressure relief cavity of a corresponding battery module and the flow-converging section. The explosion-proof valve is respectively in communication with the flow-converging section and an exterior of the power battery system. A gap is reserved between both the flow-collecting section and the flow-collecting section and the cells in the power battery system.