Battery pack for mounting cylindrical battery cells

Abstract

The utility model discloses a battery pack for mounting a cylindrical battery cell, and relates to the technical field of electric automobile accessories. The lower shell assembly is used for bearing a battery cell; the top plate covers the top of the battery cell; the lower shell assembly comprises an outer shell, a plurality of cross beams arranged in the same direction are arranged in the outer shell, a plurality of inwards-sunken positioning parts are arranged on the side faces of the cross beams, and a lining plate is arranged between every two adjacent cross beams of the outer shell. According to the utility model, the structure of the inner lining plate and the cross beam is used for replacing the structure of the inner lining plate and a fence in the prior art, a plastic uptake box is omitted, and the epoxy plate is used for replacing a top cover, so that not only is the overall weight of the battery pack reduced, but also the number of parts and welding procedures are reduced, and the processing difficulty and the production cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle accessories, in particular to a battery pack for installing cylindrical battery cores. Background Art

[0002] The battery pack is a core component of electric vehicles, used to store electrical energy to power the electric motor. The lower housing assembly is a key component of the battery pack, responsible for carrying the weight of the entire pack, including the battery module consisting of multiple cells and components such as the battery management system. It also protects the battery module from external impact and damage. Existing battery packs for mounting cylindrical cells include a lower housing assembly for holding the cells, a blister pack with cell positioning holes, and a top cover covering the top of the cells. The lower housing assembly includes an outer shell and an inner lining plate within the outer shell. The outer shell is provided with a fence around the edge of the inner lining plate. The fence is formed by two end plates and two side beams, with the end plates and side beams spaced apart. The top cover is a plastic component equipped with a busbar that connects multiple cells in series. When assembling a battery pack, the blister box is first placed inside the enclosure, followed by the battery cells on top. The cells are then aligned and positioned according to the positioning holes. The top cover is then placed over the cells. The busbar connectors are connected to the positive and negative terminals of the cells. The edges of the top cover are bolted to the two end plates, while the outer shell, inner lining, end plates, and side beams are all welded together. This battery pack structure is heavy, has a large number of parts, and requires numerous welding steps, making it difficult to manufacture and costly to produce. Utility Model Content

[0003] The purpose of the utility model is to provide a battery pack for installing cylindrical batteries, which can solve the problems of the existing battery pack for installing cylindrical batteries, such as large overall weight, large number of parts and multiple welding processes.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: this battery pack for installing cylindrical battery cells includes a lower shell assembly for supporting the battery cells and a top plate covering the top of the battery cells; the lower shell assembly includes an outer shell, and a plurality of beams arranged in the same direction are provided in the outer shell, and a plurality of inwardly recessed positioning portions are provided on the side surfaces of the beams, and an inner lining plate is provided in the outer shell between two adjacent beams.

[0005] In the above technical solution, a more specific technical solution may also be: the top of the edge of the shell is higher than the top of the beam.

[0006] Furthermore, the top plate is provided with positioning holes corresponding to the positive and negative poles of the battery cell.

[0007] Furthermore, the top plate is an epoxy plate.

[0008] Furthermore, the positioning portion is recessed inwardly into an arc shape.

[0009] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0010] The utility model replaces the prior art structure of an inner lining plate plus a fence with an inner lining plate plus a crossbeam structure, eliminates the blister box, and replaces the top cover with an epoxy plate, which not only reduces the overall weight of the battery pack, but also reduces the number of parts and welding processes, thereby reducing processing difficulty and production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 1. It is a structural schematic diagram of the lower housing assembly;

[0013] Figure 3 It is a structural diagram of the top plate. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings:

[0015] like Figures 1 to 3 The battery pack shown for installing cylindrical battery cells includes a lower shell assembly for carrying the battery cell 5 and a top plate 2 covering the top of the battery cell 5; the lower shell assembly includes an outer shell 1, and a plurality of beams 4 arranged in the same direction are provided in the outer shell 1, and a plurality of inwardly recessed positioning portions 4-1 are provided on the side of the beam 4, and the positioning portion 4-1 is recessed inwardly into an arc shape, which is adapted to the outer shape of the cylindrical battery cell 5, and the outer shell 1 is provided with an inner lining plate 3 between two adjacent beams 4.

[0016] The top of the edge of the housing 1 is higher than the top of the crossbeam 4 .

[0017] Positioning holes 2 - 1 corresponding to the positive and negative poles of the battery cells 5 are provided on the top plate 2 .

[0018] The top plate 2 is an epoxy plate.

[0019] The concave shape of the positioning portion 4 - 1 can be adaptively changed according to the actual shape of the battery cell 5 .

[0020] The inner lining plate 3 and the cross beam 4 of the utility model are fixed to the outer shell 1 by welding. During assembly, the battery cell 5 is placed on the inner lining plate 3 between the cross beams 4. The positioning portion 4-1 of the cross beam 4 is used to position the battery cell 5. After the battery cell 5 is placed, the top plate 2 is covered on the top of the battery cell 5; the busbar 6 is arranged on the top plate 2, and the connector of the busbar 6 passes through the positioning hole 2-1 and is connected to the positive and negative poles of the battery cell 5.

[0021] The utility model replaces the prior art structure of an inner lining plate plus a fence with an inner lining plate plus a crossbeam structure, eliminates the blister box, and replaces the top cover with an epoxy plate, which not only reduces the overall weight of the battery pack, but also reduces the number of parts and welding processes, thereby reducing processing difficulty and production costs.

[0022] After actual assembly and production, the weight of this battery pack for installing cylindrical battery cells is reduced by about 16.5% compared to the original, and the production cost is reduced by at least 5% compared to the original.

Claims

1. A battery pack for mounting cylindrical cells, characterized in that: It includes a lower shell assembly for carrying the battery cell and a top plate covering the top of the battery cell; the lower shell assembly includes an outer shell, a plurality of beams arranged in the same direction are provided in the outer shell, and a plurality of inwardly recessed positioning parts are provided on the side of the beam, and the outer shell is provided with an inner lining plate between two adjacent beams.

2. The battery pack for mounting cylindrical cells according to claim 1, characterized in that: The top of the shell edge is higher than the top of the beam.

3. The battery pack for mounting cylindrical cells according to claim 1 or 2, characterized in that: The top plate is provided with positioning holes corresponding to the positive and negative poles of the battery cells.

4. The battery pack for mounting cylindrical cells according to claim 3, characterized in that: The top plate is an epoxy plate.

5. The battery pack for mounting cylindrical cells according to claim 4, characterized in that: The positioning portion is recessed inwardly into an arc shape.

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