A solid-state battery module and assembly equipment

Abstract

This utility model relates to the field of battery technology, specifically disclosing a solid-state battery module and assembly equipment. The solid-state battery module includes multiple battery cells and expanding foam, with the battery cells arranged side-by-side at intervals and encased within the expanding foam. This utility model uses expanding foam instead of traditional foam and double-sided adhesive to encase the battery cells. This encapsulation of the battery cells within the expanding foam restricts their movement in all directions during compression, preventing slippage during the compression process. Simultaneously, the expanding foam provides the pre-tightening force required for the battery cells to operate after compression. Furthermore, the cost of expanding foam is lower than that of foam and adhesive backing, thus reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a solid-state battery module and assembly equipment. Background Technology

[0002] Currently, when stacking solid-state battery modules, foam is attached between the cells, and double-sided adhesive on the foam is used to fix the cells and foam together. Then, end plates are added on both sides for compression, compressing to the required megapascal-level preload force for the cells. Finally, the module is secured with straps or side plates. Because the cells require megapascal-level pressure, when the module is compressed using tooling, due to the components themselves and assembly errors, the module will be subjected to significant forces in the height and width directions. This can cause the module to bulge and deform, and slippage can occur between the cells and the foam, leading to problems in module assembly. Utility Model Content

[0003] Based on this, in order to address the technical problems of module deformation and cell slippage during compression caused by the foam fixing method used in current solid-state battery module stacking, this utility model provides a solid-state battery module and its assembly equipment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: This utility model first provides a solid-state battery module, which includes multiple battery cells and foam, with the multiple battery cells arranged side by side at intervals and wrapped in the foam.

[0005] As a further improvement to the above-mentioned solution of this utility model, both ends of the battery cell are exposed outside the foam.

[0006] As a further improvement to the above-mentioned solution of this utility model, it also includes two end plates and an elastic band. The two end plates are respectively disposed in contact with both sides of the foam, and the elastic band is sleeved over the two end plates.

[0007] As a further improvement to the above-mentioned solution of this utility model, at least two elastic bands are provided.

[0008] This utility model also provides a solid-state battery module assembly device as described above, which includes an assembly housing, the assembly housing having an assembly cavity with two through ends for placing multiple battery cells, the inner wall surface of the assembly housing being smooth, and the assembly housing having multiple injection holes for injecting expanding foam.

[0009] As a further improvement to the above-mentioned solution of this utility model, the axial direction of the potting hole is perpendicular to the arrangement direction of the multiple battery cells.

[0010] As a further improvement to the above-mentioned solution of this utility model, the assembled shell is made of metal, glass or plastic.

[0011] As a further improvement of the above-mentioned solution of this utility model, it also includes two extrusion plates, which are arranged opposite to each other and move closer to each other under the action of external force to generate extrusion force on the solid-state battery module.

[0012] As a further improvement to the above-mentioned solution of this utility model, each of the two extrusion plates is provided with an extrusion column perpendicularly connected to it on the side away from each other.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention relates to a solid-state battery module that uses expanding foam instead of traditional foam and double-sided adhesive. The battery cell is encased in expanding foam, which restricts its movement in all directions during compression, preventing slippage. Simultaneously, the expanding foam provides the pre-tension force required for cell operation after compression. Furthermore, expanding foam is cheaper than foam and adhesive backing, reducing overall costs. The assembly equipment provided by this invention allows for convenient and simple assembly of solid-state batteries using expanding foam. Attached Figure Description

[0014] Figure 1 A schematic diagram of the structure of a solid-state battery module provided in an embodiment of this utility model; Figure 2 This is a partial structural schematic diagram of a solid-state battery module provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of a grouped housing in a grouped device, provided as an embodiment of the present utility model; Figure 4 A schematic diagram of the working principle of a group device provided in this embodiment of the utility model; Figure 5 A schematic diagram illustrating the working principle of a group device provided in an embodiment of this utility model.

[0015] Reference numerals: 1. Battery cell; 2. Foam; 3. End plate; 4. Elastic band; 5. Assembly housing; 6. Glue filling hole; 7. Extrusion plate; 8. Extrusion column. Detailed Implementation

[0016] To facilitate understanding of this invention, a more comprehensive description of the invention will be provided below with reference to specific embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this invention.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0018] Reference Figure 1 , Figure 2 This embodiment proposes a solid-state battery module, which includes multiple battery cells 1 and foam 2, as well as two end plates 3 and at least two elastic bands 4. The multiple battery cells 1 are arranged side-by-side and encased within the foam 2, with the two end tabs of each cell 1 exposed outside the foam 2. The space between adjacent cells 1 is filled with foam 2 for insulation. The two end plates 3 are respectively positioned on both sides of the foam 2, and at least two elastic bands 4 are fitted over the two end plates 3.

[0019] In this embodiment, the solid-state battery module uses expanding foam 2 instead of traditional foam and double-sided adhesive to encase the battery cell 1. During compression, this expandable foam 2 restricts the movement of the battery cell 1 in all directions, preventing slippage during the compression process. Simultaneously, the expanding foam 2 provides the pre-tightening force required for the battery cell 1 to operate after compression. Furthermore, the cost of expanding foam 2 is lower than that of foam and adhesive backing, thus reducing overall costs.

[0020] Reference Figure 3-5 This embodiment also provides a grouping device for the grouping of the above-mentioned solid-state battery modules, which includes a grouping housing 5 and two extrusion plates 7.

[0021] The assembly housing 5 has a square structure with through-holes at both ends for holding multiple battery cells 1. The inner wall surface of the assembly housing 5 is smooth, and multiple injection holes 6 for injecting expanding foam 2 are provided on the assembly housing 5. The axis of the injection holes 6 is perpendicular to the arrangement direction of the multiple battery cells 1. In this embodiment, the assembly housing 5 is made of a metal material such as stainless steel, which has a smooth surface and is easy to separate from the expanding foam 2. Of course, in other embodiments, the assembly housing 5 can also be made of glass or plastic. Two extrusion plates 7 are arranged opposite each other and move closer to each other under the action of external force to generate extrusion force on the solid-state battery module. Each of the two extrusion plates 7 has an extrusion column 8 perpendicularly connected to the side away from each other.

[0022] During assembly, multiple cells 1 are first placed side by side in the assembly cavity. Figure 3(This is a cross-sectional diagram showing the installation method of cell 1). The tabs at both ends of cell 1 are located outside the assembly housing 5. The gap between two adjacent cells 1 can be controlled by adjusting the distance between the tabs of two adjacent cells 1 to ensure that the expanding foam 2 can fill the gap between the two cells 1. Then, expanding foam 2 is injected into the assembly cavity through multiple injection holes 6 of the assembly housing 5, so that the expanding foam 2 fills the assembly cavity and the gap between the cells 1. After the expanding foam 2 solidifies, the assembly housing 5 is removed. Then, two end plates 3 are placed on both sides of the expanding foam 2, with the end plates 3 parallel to the cells 1. Then, two extrusion plates 7 are placed on the outside of the two end plates 3, and the solid-state battery module is extruded by two extrusion columns 8 until the predetermined pre-tightening force is reached. After the elastic band 4 is fitted, the two extrusion plates 7 are removed.

[0023] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0026] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A solid-state battery module, characterized in that, It includes multiple battery cells (1) and foam (2), with the multiple battery cells (1) arranged side by side at intervals and wrapped in foam (2).

2. The solid-state battery module according to claim 1, characterized in that, Both ends of the battery cell (1) are exposed outside the foam (2).

3. The solid-state battery module according to claim 1, characterized in that, It also includes two end plates (3) and an elastic band (4). The two end plates (3) are respectively positioned on both sides of the foam (2), and the elastic band (4) is sleeved over the two end plates (3).

4. The solid-state battery module according to claim 3, characterized in that, The elastic band (4) has at least two.

5. A device for assembling solid-state battery modules as described in any one of claims 1-4, characterized in that, It includes a set of housings (5), which has a set of cavities through both ends for placing multiple battery cells (1), the inner wall surface of the set of housings (5) is smooth, and the set of housings (5) is provided with multiple potting holes (6) for potting foam (2).

6. The assembly equipment for solid-state battery modules according to claim 5, characterized in that, The axial direction of the potting hole (6) is perpendicular to the arrangement direction of the multiple battery cells (1).

7. The assembly equipment for solid-state battery modules according to claim 5, characterized in that, The assembly shell (5) is made of metal, glass or plastic.

8. The assembly equipment for solid-state battery modules according to claim 5, characterized in that, It also includes two extrusion plates (7), which are arranged opposite each other and move closer to each other under the action of external force to generate extrusion force on the solid-state battery module.

9. The assembly equipment for solid-state battery modules according to claim 8, characterized in that, Each of the two extrusion plates (7) is provided with an extrusion column (8) perpendicularly connected to it on one side away from each other.

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