Anti-voltage accumulator case used for electric bicycle

The utility model relates to a pressure-preventing battery jar for electric bicycles, comprising an upper cover of the battery jar and a case body of the battery jar; the pressure-preventing battery jar is characterized in that: projection bearings are arranged at four corners on the top surface of the upper cover of the battery jar. The projection bearings are movable, and the structure of the projection bearing is that: four movable cap bodies are respectively sheathed on projection blocks which are integrated with the upper cover of the battery jar into one body. The pressure-preventing battery jar has the beneficial effects that: the pressure-preventing battery jar has the advantages that the preparation is convenient, the cost is low, economic and durable, and the safety performance is good.