Battery box body and battery pack

Abstract

The invention provides a battery box and a battery pack, the battery box comprises a bottom plate and an edge beam arranged at the edge of the bottom plate, the battery box further comprises a reinforcing beam, the reinforcing beam is connected to the inner side of the edge beam, the reinforcing beam comprises a body part and a connecting flange in the first direction perpendicular to the extending direction of the reinforcing beam and perpendicular to the plane where the bottom plate is located, and the connecting flange is connected to the body part. The connecting flange is welded to the edge beam, and in the first direction, the ratio of the height of the connecting flange to the height of the reinforcing beam ranges from 1 / 2 to 1 / 12. The connecting turnup is welded with the edge beam, and the contact area and the welding area between the connecting turnup and the edge beam are large, so that the reinforcing beam can be firmly welded on the edge beam, and the situation that the connecting turnup and the edge beam are separated is prevented. Furthermore, by adjusting the height relation between the connecting turnup and the reinforcing beam, the connecting strength between the reinforcing beam and the edge beam can be guaranteed under the condition that the reinforcing beam has good extrusion strength.

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