High-strength casing for automotive battery cells

Abstract

The utility model relates to the technical field of automobile batteries, in particular to a high-strength outer shell of an automobile battery cell, comprising an upper cover and a lower shell body, the lower shell body comprising an inner shell layer and an outer shell layer, a mesh cage being sandwiched between the inner shell layer and the outer shell layer, an elastic layer being arranged under the outer shell layer, a bottom protective block being arranged under the elastic layer, a buckle group being connected to the upper edge of the outer shell layer, the outer shell layer having a harder hardness than the inner shell layer, the cross-sectional area of ​​the bottom protective block gradually decreasing from top to bottom, and the outer surface except for the top surface being a plane, the other surfaces are smooth curved surfaces; the high-strength outer shell of an automobile battery cell provided by the utility model adopts a double-layer shell mesh cage design, has high structural strength, and is not easy to be damaged; the connection strength between the upper cover and the lower shell body is high, and the two are not easy to be separated during use; in addition, a bottom protective block is arranged to realize anti-puncture protection for the bottom of the battery cell.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile batteries, in particular to a high-strength shell of an automobile battery core. Background Art

[0002] With the rapid development of electric vehicles, the safety, stability and life of their internal power batteries have become the focus of attention. The shell of the automotive battery cell not only needs to protect the internal battery cell from the influence of the external environment, but also needs to have sufficient strength and impact resistance to cope with various complex situations that may be encountered during the driving of the car. Therefore, the battery cell shell that is insufficient in strength and impact resistance is difficult to meet the high requirements of modern electric vehicles for battery performance.

[0003] Increasing the strength of the cell casing is an important design consideration as it directly affects the safety of the power battery. Summary of the invention

[0004] The purpose of the utility model is to provide a high-strength automobile battery core shell, which is not limited to increasing the shell body strength, but also increases the connection strength with the upper cover.

[0005] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0006] The high-strength shell of an automobile battery cell comprises an upper cover and a lower shell body, the lower shell body comprises an inner shell layer and an outer shell layer, a mesh cage is sandwiched between the inner shell layer and the outer shell layer, an elastic layer is arranged under the outer shell layer, a bottom protective block is arranged under the elastic layer, a buckle group is connected to the upper edge of the outer shell layer, and the outer shell layer has a harderness than the inner shell layer.

[0007] Furthermore, the cross-sectional area of ​​the bottom protection block gradually decreases from top to bottom, and except for the top surface which is a flat surface, the rest of the surfaces are smooth curved surfaces.

[0008] Furthermore, the mesh cage is formed by metal wires connected in an interlaced manner, which contact the inner shell layer and the outer shell layer, and the metal wires are solid wires or hollow wires.

[0009] Furthermore, each buckle group includes two buckles arranged opposite to each other, the roots of the buckles connected to the outer shell layer can be bent, and the opposite ends of the ends are provided with snap-fits, and the snap-fits of the two buckles on the same buckle group match.

[0010] Furthermore, the number of the buckle groups is 2 to 5.

[0011] Furthermore, the inner shell layer is made by stamping an aluminum alloy plate, and the outer shell layer is made by stamping a stainless steel plate.

[0012] Furthermore, the elastic layer is composed of a spring array.

[0013] The beneficial effects of the technical solution of the utility model are:

[0014] The high-strength outer shell of the automobile battery cell provided by the utility model adopts a double-layer shell mesh cage design, has high structural strength and is not easy to be damaged; the connection strength between the upper cover and the lower shell body is high, and the two are not easy to separate during use; in addition, a bottom protective block is provided to realize anti-puncture protection of the bottom of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for use in the description of the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the cross section along the AA direction;

[0018] Figure 3 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0019] Figure 4 This is a schematic diagram of the structure of the net cage in the utility model;

[0020] Figure 5 This is a schematic diagram of the connection between the buckle assembly and the upper cover in the utility model;

[0021] Figure 6 It is a schematic diagram of the anti-puncture function of the utility model.

[0022] In the figure: 1: upper cover; 2, lower shell; 2a, inner shell layer; 2b, outer shell layer; 2b-1, buckle group; 2c, mesh cage; 2d, elastic layer; 2d-1, spring; 2e, bottom guard block. DETAILED DESCRIPTION

[0023] The utility model is now further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model. The utility model is described in detail using structural schematic diagrams, etc. The schematic diagrams are only examples, and they should not limit the scope of protection of the utility model.

[0024] Please refer to Figures 1 to 5As shown, the high-strength outer shell of the automotive battery cell includes an upper cover 1 and a lower shell body 2, the lower shell body 2 includes an inner shell layer 2a and an outer shell layer 2b, a mesh cage 2c is sandwiched between the inner shell layer 2a and the outer shell layer 2b, an elastic layer 2d is arranged under the outer shell layer 2b, a bottom protective block 2e is arranged under the elastic layer 2d, a buckle group 2b-1 is connected to the upper edge of the outer shell layer 2b, and the hardness of the material used for the outer shell layer 2b is greater than that of the inner shell layer 2a.

[0025] Specifically, the cross-sectional area of ​​the bottom protection block 2e gradually decreases from top to bottom, and except for the top surface which is a flat surface, the other surfaces are smooth curved surfaces, such as Figure 6 As shown, when punctured from below, the puncture tip has a very small contact point on the bottom of the bottom guard block 2e, and in most cases is guided by the smooth arc surface to deviate to one side and pass from the side, thereby achieving anti-puncture protection for the bottom of the battery cell.

[0026] The mesh cage 2c is formed by interlaced metal wires, which contact the inner shell layer 2a and the outer shell layer 2b. The metal wires are solid wires or hollow wires. If hollow wires are used, the inside can be connected to coolant to enhance the heat dissipation of the battery cells.

[0027] The number of buckle groups 2b-1 that can be set as needed is 2 to 5, and each buckle group 2b-1 includes two relatively arranged buckles. The root of the connection end of the buckle and the outer shell layer 2b can be bent, and a snap is set at the opposite end of the end. The snaps of the two buckles on the same buckle group 2b-1 match. When the upper cover 1 is installed on the lower shell body 2, the buckle is bent 90° to produce plastic deformation, and the head ends of the two buckles are connected by snaps, and then the connection point is strengthened by welding or gluing technology to provide a locking function. The function of the above scheme is to make the connection strength between the upper cover 1 and the lower shell body 2 high and not easy to separate during use.

[0028] The inner shell layer 2a is made of stamped aluminum alloy plate, has good strength and thermal conductivity, and has a low density, which is conducive to weight reduction; the outer shell layer 2b is made of stamped stainless steel plate, has excellent corrosion resistance and hardness, ensuring the durability of the outer shell.

[0029] The elastic layer 2d is composed of an array of vertically placed springs 2d-1, which provides a shock-absorbing function and is compressible and twistable, effectively absorbing bumps and shocks to ensure battery safety.

[0030] The high-strength outer shell of the automobile battery cell of the utility model has a multi-layer structure and a special design, and not only has excellent protection performance and heat dissipation performance, but also has the advantage of easy installation.

[0031] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, implementing changes, modifications or additions should all fall within the protection scope of the utility model.

Claims

1. High-strength casing for automotive battery cells, characterized by: The invention comprises an upper cover (1) and a lower shell body (2), wherein the lower shell body (2) comprises an inner shell layer (2a) and an outer shell layer (2b), a mesh cage (2c) is sandwiched between the inner shell layer (2a) and the outer shell layer (2b), an elastic layer (2d) is arranged below the outer shell layer (2b), a bottom protection block (2e) is arranged below the elastic layer (2d), a buckle group (2b-1) is connected to the upper edge of the outer shell layer (2b), and the outer shell layer (2b) has a harderness than the inner shell layer (2a).

2. The high-strength casing for automotive battery cells according to claim 1, characterized in that: The cross-sectional area of ​​the bottom protection block (2e) gradually decreases from top to bottom, and except for the top surface which is a flat surface, the rest of the surfaces are smooth curved surfaces.

3. The high-strength casing for automotive battery cells according to claim 1, characterized in that: The mesh cage (2c) is formed by interlaced metal wires, which are in contact with the inner shell layer (2a) and the outer shell layer (2b), and the metal wires are solid wires or hollow wires.

4. The high-strength casing for automotive battery cells according to claim 1, characterized in that: Each buckle group (2b-1) comprises two buckles arranged opposite to each other, the roots of the buckles connected to the outer shell layer (2b) are bendable, the opposite end of the end is provided with a snap-on, and the snap-ons of the two buckles on the same buckle group (2b-1) match.

5. The high-strength casing for automotive battery cells according to claim 4, characterized in that: The number of the buckle groups (2b-1) is 2 to 5.

6. The high-strength casing for automotive battery cells according to claim 5, characterized in that: The inner shell layer (2a) is made by stamping an aluminum alloy plate, and the outer shell layer (2b) is made by stamping a stainless steel plate.

7. The high-strength casing for automotive battery cells according to claim 1, characterized in that: The elastic layer (2d) is composed of an array of springs (2d-1).

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