Battery cell, battery device, energy storage device, and electric device

Abstract

The application discloses a battery monomer, a battery device, an energy storage device and a power utilization device. The battery monomer comprises a shell and at least one electrode assembly. The shell comprises a shell body with an opening on one side in a first direction, an end cover for closing the opening, and a lower plastic provided on the inner side surface of the end cover. The shell body and the end cover form a containing cavity. The size of the end cover along a second direction is not greater than the size along a third direction. The first direction, the second direction and the third direction are perpendicular to each other. The at least one electrode assembly is contained in the containing cavity. The surface of the lower plastic away from the end cover comprises a first surface at both ends along the third direction. At least one first surface is formed with a recessed avoidance groove towards the end cover. The avoidance groove is formed in the middle of the first surface along the second direction. The first surface abuts against the electrode assembly, and the avoidance groove and the electrode assembly form an avoidance space. The battery monomer, the battery device, the energy storage device and the power utilization device provided by the application have low short circuit risk.

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