Battery module

Abstract

The utility model provides a battery module, which relates to the technical field of batteries and comprises a shell assembly, a plurality of battery cell assemblies are mounted in the shell assembly, and pluggable vacuum spacers are mounted between adjacent battery cell assemblies. The battery pack has the beneficial effects that the direct contact of the battery cell assemblies is avoided by arranging the vacuum spacers between the adjacent battery cell assemblies, and the problem of heat spreading is effectively solved by adopting the design of the pluggable vacuum spacers. The vacuum spacer not only provides excellent thermal isolation and physical isolation effects, but also enables the battery module to have higher flexibility and safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery module. BACKGROUND

[0002] Lithium ion batteries are composed of positive electrodes, negative electrodes, electrolytes, and separators. During charging and discharging, oxidation-reduction reactions occur between the positive and negative electrode materials, accompanied by the insertion and extraction of lithium ions, thus realizing the storage and release of electrical energy. Although these chemical reactions are the basis for the normal operation of the battery, they may lose control under certain conditions (such as overcharging, overdischarging, high temperature, etc.), leading to the release of a large amount of heat.

[0003] Battery thermal management is one of the key technologies to ensure the safety of battery systems. It mainly maintains the battery temperature within a safe range by monitoring the battery temperature, controlling the charging and discharging rate, using heat dissipation materials, and preventing the occurrence of thermal runaway. When the battery temperature rises, the thermal management system will start the heat dissipation mechanism, such as fan cooling, liquid cooling circulation, etc., to reduce the battery temperature. However, battery thermal management may also experience thermal runaway under unexpected circumstances, and adjacent cells may receive heat transfer from the runaway cells, leading to thermal spread. How to prevent the thermal spread of cell heat has become a top priority in the design of battery systems. SUMMARY

[0004] In view of the problems existing in the prior art, the utility model provides a battery module, comprising:

[0005] A shell assembly is provided, and a plurality of cell assemblies are installed inside the shell assembly. A pluggable vacuum separator is installed between adjacent cell assemblies.

[0006] Preferably, the bottom of the shell assembly is provided with a plurality of grooves, and each groove is provided with a cell assembly.

[0007] Preferably, the front and rear inner side walls of the shell assembly are provided with a plurality of clamping grooves, and each vacuum separator is installed in a clamping groove.

[0008] Preferably, the outer side wall of the shell assembly is provided with two limiting strips distributed vertically, and a fixed metal strip is arranged between the limiting strips.

[0009] Preferably, the left and right inner side walls of the shell assembly are provided with a plurality of elastic structures.

[0010] Preferably, the vacuum separator is provided with a vacuum cavity inside.

[0011] Preferably, the surface of the vacuum separator is coated with a heat radiation resistant coating.

[0012] Preferably, the bottom of each groove and the corresponding cell assembly are coated with structural adhesive.

[0013] Preferably, the limiting strip and the shell assembly are made of plastic, and the limiting strip and the shell assembly are integrally injection molded.

[0014] Preferably, the height of the vacuum spacer is not less than the height of the cell assembly.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] By installing a vacuum spacer between adjacent cell assemblies, direct contact between cell assemblies is avoided, and by using a pluggable vacuum spacer design, the problem of heat spreading is effectively solved. The vacuum spacer not only provides excellent thermal and physical isolation, but also makes the battery module more flexible and safe. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 For the preferred embodiment of the present application, a structural diagram of a battery module is provided.

[0018] Figure 2 For the preferred embodiment of the present application, a top view of a battery module is provided.

[0019] Figure 3 For the preferred embodiment of the present application, a schematic diagram of a shell assembly is provided.

[0020] Figure 4 For the preferred embodiment of the present application, a top view of a shell assembly is provided.

[0021] Figure 5 For Figure 4 A-A cross-sectional view of the shell assembly is provided.

[0022] Figure 6 For the preferred embodiment of the present application, a cross-sectional view of a vacuum spacer is provided. DETAILED DESCRIPTION

[0023] The present application will be described in detail below in conjunction with the drawings and specific embodiments. The present application is not limited to this embodiment, and other embodiments can also fall within the scope of the present application as long as they comply with the spirit of the present application.

[0024] In the preferred embodiment of the present application, based on the above problems existing in the prior art, a battery module is provided, comprising:

[0025] A shell assembly 1 is provided, and a plurality of cell assemblies 2 are installed inside the shell assembly 1. A pluggable vacuum spacer 3 is installed between adjacent cell assemblies 2.

[0026] Specifically, as shown in the drawings, Figure 1 A plurality of cell assemblies 2 are arranged side by side in the shell assembly 1, and a vacuum partition 3 is inserted between adjacent cell assemblies 2 to isolate the cell assemblies 2 from direct contact, thereby reducing heat transfer between adjacent cell assemblies 2 when thermal runaway occurs and effectively solving the problem of heat spreading.

[0027] In a preferred embodiment of the utility model, the bottom of the shell assembly 1 is provided with a plurality of grooves 11, and one cell assembly 2 is installed in each groove 11. Structural glue is applied between the bottom of each groove 11 and the corresponding cell assembly 2.

[0028] Specifically, as shown in the drawings, Figure 2 and Figure 4 As shown in the drawings, Figure 4 is a top view of the shell assembly 1 without the cell assembly 2 and the vacuum partition 3, the bottom of the shell assembly 1 is provided with a plurality of grooves 11, and one cell assembly 2 can be installed in each groove 11. When assembling the cell module, first apply structural glue to the groove 11 structure at the bottom of the shell assembly 1, then alternately insert the vacuum partition 3 and the cell assembly 2 into the shell assembly 1, and finally obtain the battery module as shown in the drawings. Figure 2

[0029] In a preferred embodiment of the utility model, a plurality of clamping grooves 12 are formed in the front and rear inner side walls of the shell assembly 1, and each vacuum partition 3 is installed in a clamping groove 12.

[0030] Specifically, as shown in the drawings, Figure 3 and Figure 4 Clamping grooves 12 are formed in the front and rear side walls of the shell assembly, the width of the clamping grooves 12 is greater than or equal to the thickness of the vacuum partition 3, the vacuum partition 3 can be inserted and removed into the clamping grooves 12, which facilitates the assembly of the battery module and improves the stability, flexibility and safety of the battery module.

[0031] In a preferred embodiment of the utility model, the outer side wall of the shell assembly 1 is provided with two limiting strips 13 distributed vertically, and a fixed metal strip 4 is arranged between the limiting strips 13.

[0032] Specifically, as the application of batteries in the automotive field becomes more and more widespread, the long-life requirement of battery systems becomes increasingly important, and the clamping force of the cell during use directly determines the cycle life of the cell. As shown in the drawings, Figure 3 and Figure 5 ​As shown, the outer wall of the shell assembly 1 is provided with a fixed metal band 4, and the width of the fixed metal band 4 can be designed according to the clamping force required in the actual battery cycle use, so that the overall size of the battery module remains unchanged. The outer wall of the shell assembly 1 is also provided with two limiting strips 13 distributed on the upper and lower sides of the fixed metal band 4, which are used to limit the fixed metal band 4 to prevent the fixed metal band 4 from sliding or even falling off.

[0033] Further, the limiting strip 13 and the shell assembly 1 in the embodiment are plastic, and the limiting strip 13 and the shell assembly 1 are integrally injection molded. And the fixed metal band 4 can also be directly put into the mold during the injection molding process to form an integral part, so that the fixed metal band 4 is partially embedded in the shell assembly 1 to further improve the overall structural strength and stability.

[0034] In the preferred embodiment of the utility model, as shown in Figure 1 , 2 , 3, the left and right inner walls of the shell assembly 1 are provided with a plurality of elastic structures 14.

[0035] Specifically, in the embodiment, a plurality of wave-shaped elastic structures 14 are arranged on the left and right inner walls of the shell assembly 1, which are used to absorb energy and provide a certain deformation space when the battery module is deformed under external force and when the internal battery assembly 2 expands, thereby reducing the overall deformation degree of the battery module.

[0036] In the preferred embodiment of the utility model, as shown in Figure 6 , the vacuum spacer 3 is provided with a vacuum cavity 31 inside. The surface of the vacuum spacer 31 is coated with a heat radiation resistant coating.

[0037] Specifically, in the embodiment, the inside of the vacuum spacer 3 is a vacuum cavity 31, and the vacuum cavity has lower heat transfer efficiency and better heat insulation effect than the solid cavity. Moreover, the surface is coated with a coating of heat radiation resistant material, which can further improve the heat insulation effect.

[0038] In the preferred embodiment of the utility model, the height of the vacuum spacer 3 is not less than the height of the battery assembly 2.

[0039] Specifically, in the embodiment, the height of the vacuum spacer 3 is not less than the height of the battery assembly 2, which can completely block the heat transfer between adjacent battery assemblies, and can further improve the heat insulation effect.

[0040] The above merely describes the preferred embodiments of the present application, and is not intended to limit the implementation and protection scope of the present application. For those skilled in the art, it should be understood that any equivalent changes and obvious variations made according to the content of the present application and drawings should be included in the protection scope of the present application.

Claims

1. A battery module, characterized by, Include: The shell assembly is internally mounted with a plurality of battery assemblies, and a pluggable vacuum spacer is mounted between adjacent battery assemblies. The inner side wall of the shell assembly is provided with a plurality of elastic structures.

2. The battery module of claim 1, wherein, The bottom of the shell assembly is provided with a plurality of grooves, and each groove is provided with a battery assembly.

3. The battery module of claim 1, wherein, The front and rear inner side walls of the shell assembly are provided with a plurality of clamping grooves, and each vacuum spacer is mounted in a clamping groove.

4. The battery module of claim 1, wherein, The outer side wall of the shell assembly is provided with two limiting strips distributed upward and downward, and a fixed metal strip is arranged between the limiting strips.

5. The battery module of claim 1, wherein, The vacuum spacer is internally provided with a vacuum cavity.

6. The battery module of claim 1, wherein, The surface of the vacuum spacer is coated with a heat radiation resistant coating.

7. The battery module of claim 2, wherein, The bottom of each groove and the corresponding battery assembly are coated with structural adhesive.

8. The battery module of claim 4, wherein, The limiting strip and the shell assembly are made of plastic, and the limiting strip and the shell assembly are integrally injection molded.

9. The battery module of claim 1, wherein, The height of the vacuum spacer is not less than the height of the battery assembly.

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