A laminated power battery pack box

Abstract

The invention relates to a stacked power battery pack box body, which includes a lower box body located at the bottom and an upper box body located on the second floor or above, and the boxes of each layer are connected by flanges. The upper box includes a bottom box, side plates and positioning pipes; the bottom box is a cuboid box structure with an open upper end, consisting of a bottom plate and four enclosures vertically connected to the edge of the bottom plate; the side plates are four and the height is the same, the top and the bottom all have outwardly extending flange edges, the four side plates are respectively fixedly connected to the outer sides of the enclosure, the lower surface of the side plates is connected to the lower side of the bottom box The surface is even; there are four positioning tubes, which are respectively fixed laterally on the inner sides of the four side plates, the upper surfaces of the four positioning tubes are flush, and the upper surfaces of the four positioning tubes are higher than the side plates of the upper surface. The cabinet is multi-layered and directly installed without brackets; the structure is reasonable, the strength is higher, and the sealing performance is better.

Description

technical field [0001] The invention relates to the field of power batteries of electric vehicles, in particular to a laminated power battery pack box. Background technique [0002] In the field of electric vehicles, the power battery pack plays an irreplaceable and important role as the power source of electric vehicles. The battery pack is generally composed of a box and batteries inside the box. In order to ensure the safety of the internal batteries and electrical components, the box must be waterproof. In the existing power battery box, the same board is generally used. After cutting according to the unfolded drawing, it is then bent and welded. After the welds of the four corners of the box are welded, in order to ensure a beautiful appearance, the external welds must be polished, and often after grinding. Due to trachoma, there is a problem of water leakage in the box body. At the same time, the deformation of the flange edge of the existing box body is relatively la...

AI Technical Summary

Problems solved by technology

The battery pack is generally composed of a box and batteries inside the box. In order to ensure the safety of the internal batteries and electrical components, the box must be waterproof. In the existing power battery box, the same board is generally used. After cutting according to the unfolded drawing, it is then bent and welded. After the welds of the four corners of the box are welded, in order to ensure a beautiful appearance, the external welds must be polished, and often after grinding. Due to trachoma, there is a problem of water leakage in the box body. At the same time, the deformation of the flange edge of the existing box body is relatively large after welding, resulting in poor sealing performance; Strong vibration is generated, and the existing power battery pack box is also poor in anti-seismic effect, often due to vibration, the welding part is desoldered or cracked and water leaks

In addition, the existing power battery pack boxes are generally single-layer boxes. If multi-layer arrangements are to be made, multi-layer brackets must be used, and a box is placed on each layer of brackets, which will inevitably occupy a large space

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