Battery module, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery module, a battery pack and electric equipment, and relates to the technical field of lithium batteries. The battery module comprises a pressing plate, a battery cell assembly and two end plates, the two end plates are arranged in a spaced mode in the first direction. And all the battery cell assemblies are clamped between the two end plates and are arranged at intervals along a second direction perpendicular to the first direction. It can be understood that through clamping and positioning of the practical end plate, it can be guaranteed that the whole battery cell assembly can be accurately placed at the preset position. On the basis, the pressing plate comprises a first plate body and a second plate body which are connected with each other. The second plate body is located above the battery cell assembly and abuts against the battery cell assembly, so that it is ensured that the battery cell assembly is stably clamped up and down. And the first plate body is positioned on one side of the battery cell assembly and is used as a positioning reference surface, so that a plurality of battery cells in the battery cell assembly are orderly arranged, and the positioning precision of each battery cell is accurately improved.

Description

Technical Field

[0001] The present application relates to the field of lithium battery technology, and more specifically, to a battery module, a battery pack, and an electrical device. Background Art

[0002] During the design and manufacturing of battery packs, the way the battery cells are fixed is crucial to ensuring the overall stability and safety of the battery pack. Currently, a common method for fixing the battery cells is to inject glue between the bottom of the cell and the lower shell of the battery pack.

[0003] However, due to the difficulty in controlling the glue filling process, it is difficult to ensure that each battery cell is precisely positioned in the preset position. This fixing method leads to inconsistencies in the relative positions of the battery cells, which in turn causes assembly accuracy issues. When multiple battery cells are used in an array, these precision deviations gradually accumulate, ultimately adversely affecting the overall performance of the battery pack. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a battery module, a battery pack and an electrical device, which can enable multiple battery cells in a battery cell assembly to be arranged in an orderly manner, thereby effectively improving the positioning accuracy of the battery cells, thereby effectively improving the overall performance and safety of the battery pack.

[0005] In a first aspect, the present invention provides a battery module comprising a pressure plate, a cell assembly, and two end plates; the two end plates are spaced apart along a first direction; all the cell assemblies are clamped between the two end plates and spaced apart along a second direction perpendicular to the first direction;

[0006] The pressure plate includes a first plate body and a second plate body connected to each other. The first plate body is located on one side of the battery core assembly, and its two ends are respectively connected to the two end plates; the second plate body is located above the battery core assembly and abuts against the battery core assembly.

[0007] In an optional embodiment, the number of the battery cell assemblies is at least two, the second plate includes a first abutting portion and a second abutting portion connected to each other, and the first plate is vertically connected to the connection between the first abutting portion and the second abutting portion;

[0008] In two adjacent battery cell assemblies, the first abutting portion abuts against one of the battery cell assemblies, the second abutting portion abuts against the other battery cell assembly, and the first plate is located between the two battery cell assemblies.

[0009] In an optional embodiment, the first plate body and the second plate body are both configured as strip structures extending along the first direction, and the first plate body is provided with a through hole extending along the first direction.

[0010] In an optional embodiment, the first plate body and the second plate body are both made of aluminum profiles, and the first plate body and the second plate body are integrally formed.

[0011] In an optional embodiment, the battery module further includes a fastener, the end plate is provided with a first positioning hole, the first plate body is provided with a second positioning hole, the first positioning hole and the second positioning hole are correspondingly arranged and both cooperate with the fastener.

[0012] In an optional embodiment, one of the first plate body and the end plate is provided with a clamping portion, and the other is provided with a clamping groove that cooperates with the clamping portion.

[0013] In an optional embodiment, the battery module further includes two side plates, which are spaced apart along the second direction and together with the two end plates form an accommodating space, and the battery cell components are all located in the accommodating space.

[0014] In an optional embodiment, the battery module further includes a cable tie, which is used to bundle the two battery cell assemblies and the two end plates into one.

[0015] In a second aspect, the present invention provides a battery pack comprising the battery module of any one of the aforementioned embodiments and a shell, wherein the battery module is located inside the shell.

[0016] In a third aspect, the present invention provides an electrical device comprising the battery pack of the aforementioned embodiment and a device body, wherein the battery pack is electrically connected to the device body.

[0017] The beneficial effects of the embodiments of the present utility model are:

[0018] The embodiments of the present utility model provide a battery module, a battery pack and an electrical device. The battery module includes a pressure plate, a battery cell assembly and two end plates. The two end plates are spaced apart along a first direction; all battery cell assemblies are clamped between the two end plates and spaced apart along a second direction perpendicular to the first direction. It can be understood that by clamping and positioning with the end plates, it can be ensured that the battery cell assembly as a whole can be accurately placed in a predetermined position. On the basis of the above, the pressure plate includes a first plate body and a second plate body that are interconnected. The second plate body is located above the battery cell assembly and abuts against the battery cell assembly to ensure stable clamping of the battery cell assembly from top to bottom. The first plate body is located on one side of the battery cell assembly and serves as a positioning reference surface to ensure that the multiple battery cells in the battery cell assembly are arranged in an orderly manner, thereby accurately improving the positioning accuracy of each battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of a battery module provided by an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of a pressure plate provided in an embodiment of the present utility model.

[0022] Icons: 10-battery module; 100-pressing plate; 110-first plate; 111-second positioning hole; 113-through hole; 130-second plate; 131-first supporting portion; 133-second supporting portion; 300-battery cell assembly; 500-end plate; 510-first positioning hole; 700-fastener; 910-first direction; 930-second direction. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0025] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0026] Example

[0027] The present invention provides an electrical device, specifically an electric vessel or electric vehicle. The device comprises a battery pack and a device body, with the battery pack electrically connected to the device body. For example, the device body may be an electric motor capable of converting electrical energy provided by the battery pack into mechanical energy to drive a propeller in an electric vessel or a wheel in an electric vehicle.

[0028] The battery pack includes a battery module 10 and a housing, with the battery module 10 located inside the housing. It should be noted that the design of the battery module 10 in this application enables the orderly arrangement of multiple cells in the cell assembly 300, thereby effectively improving the positioning accuracy of the cells and thereby effectively enhancing the overall performance and safety of the battery pack.

[0029] The specific structure and relative relationship between the various components of the battery module 10 provided in this embodiment will be described in detail below. Figure 1 , Figure 1 Schematic diagram of a battery module 10 provided in an embodiment of the present invention. The present invention provides a battery module 10, comprising a pressing plate 100, two end plates 500 and at least two battery cell assemblies 300.

[0030] The two end plates 500 are spaced apart along a first direction 910; all the battery cell assemblies 300 are clamped between the two end plates 500 and spaced apart along a second direction 930 perpendicular to the first direction 910. It is understood that by clamping and positioning with the end plates 500, the battery cell assemblies 300 can be accurately placed in the predetermined position, preventing the battery cell assemblies 300 from shifting or misaligning.

[0031] Based on the above, the pressure plate 100 includes a first plate 110 and a second plate 130 that are interconnected. The second plate 130 is located above the battery cell assembly 300 and abuts against the battery cell assembly 300 to ensure stable clamping of the battery cell assembly 300 from top to bottom. The first plate 110 is located on one side of the battery cell assembly 300, with its ends connected to the two end plates 500. It can be understood that the first plate 110 serves as a positioning reference surface, ensuring the orderly arrangement of the multiple battery cells in the battery cell assembly 300, thereby accurately improving the positioning accuracy of each battery cell.

[0032] It should also be noted that, compared to glue-potting for positioning and fixation, the battery module 10 provided in the present application can not only be accurately positioned and stably assembled through the end plates 500 and the pressure plate 100, but is also easy to disassemble, which can greatly reduce the maintenance cost and workload of the battery module 10. In addition, the glue-potting process also has the disadvantage of being weak in resistance to thermal shock, easily cracking after being subjected to thermal shock, and lacking strength. However, the present application has sufficient mechanical strength to effectively avoid the above problems.

[0033] Specifically, both the first plate 110 and the second plate 130 are made of aluminum extrusion. It should be noted that aluminum extrusion has a high specific strength, providing sufficient mechanical strength and rigidity while maintaining lightweight, thereby increasing structural stability and impact resistance. Furthermore, since aluminum extrusion can be extruded to produce various structures, the first plate 110 and the second plate 130 are integrally formed to improve production efficiency.

[0034] See also Figure 2 , Figure 2 This is a schematic diagram of a pressure plate 100 according to an embodiment of the present invention. In some embodiments, there are at least two battery cell assemblies 300. The second plate 130 includes a first abutting portion 131 and a second abutting portion 133 connected to each other. The first plate 110 is perpendicularly connected to the connection between the first abutting portion 131 and the second abutting portion 133. This means that the pressure plate 100 has a T-shaped structure.

[0035] Furthermore, in two adjacent battery cell assemblies 300 , the first abutting portion 131 abuts against one of the battery cell assemblies 300 , the second abutting portion 133 abuts against the other battery cell assembly 300 , and the first plate 110 is located between the two battery cell assemblies 300 .

[0036] Based on the above setting, the two sides of the first plate 110 serve as the positioning reference surfaces of the two battery cell assemblies 300, thereby ensuring the precise positioning of each battery cell in the battery cell assembly 300, while also realizing the positioning between two adjacent battery cell assemblies 300, further improving the assembly accuracy of the battery cells.

[0037] In other embodiments, the second plate 130 can also be connected perpendicularly to one side of the first plate 110, forming an L-shaped structure. Each battery cell assembly 300 can correspond to one or two L-shaped pressure plates 100. For example, the battery cell assembly 300 located in the middle can correspond one-to-one with each L-shaped pressure plate 100, while the battery cell assemblies 300 located at the edge can correspond to two oppositely positioned L-shaped pressure plates 100.

[0038] It should be noted that the two "L"-shaped pressure plates 100 corresponding to the battery cell assemblies 300 located at the edge can further achieve clamping and fixing of all battery cell assemblies 300 in the second direction 930. It is understandable that the "T"-shaped pressure plates 100 can also be arranged in a position and quantity similar to the above-mentioned "L"-shaped pressure plates 100, and will not be described in detail in this application.

[0039] In other embodiments, in order to facilitate the fixation of the battery cell assembly 300 in the second direction 930, the battery module 10 also includes two side plates, which are arranged at intervals along the second direction 930 and are jointly enclosed with the two end plates 500 to form a accommodating space, and the battery cell assemblies 300 are all located in the accommodating space.

[0040] By setting up two side plates, two end plates 500 and a pressure plate 100, multiple battery cells can be clamped and fixed. On the one hand, the battery cells can be accurately positioned, not easily displaced, and relatively stably fixed; on the other hand, the battery cells can be less likely to deform, and can effectively withstand the tension of the battery cells, thereby effectively improving the service life of the battery cells.

[0041] In other embodiments, in order to fix the battery cell assembly 300 in the second direction 930 while resisting the expansion force generated by the battery cell during the charging and discharging process, the battery module 10 may also include a cable tie, which is used to bundle the two battery cell assemblies 300 and the two end plates 500 into one, so that the battery cell assembly 300 and the end plate 500 form a stable battery module 10.

[0042] Alternatively, the cable tie may be a circular cable tie that can be used alone for bundling, or two U-shaped cable ties, each connected to a different end plate 500, can be used together for bundling. Furthermore, it is understood that the beneficial effects of using this cable tie for fixing are similar to those of using two side plates, and will not be further elaborated here.

[0043] Please refer again Figure 1 In order to improve the stability of the battery module 10 when clamped and fixed in the first direction 910, the battery module 10 also includes a fastener 700, the end plate 500 is provided with a first positioning hole 510, and the first plate body 110 is provided with a second positioning hole 111. The first positioning hole 510 and the second positioning hole 111 are correspondingly arranged and both cooperate with the fastener 700.

[0044] Based on the above arrangement, the fastener 700 sequentially passes through the first positioning hole 510 and the second positioning hole 111 to achieve a secure connection between the end plate 500 and the pressure plate 100. Alternatively, the fastener 700 can be configured as a bolt, and the first positioning hole 510 and the second positioning hole 111 can be configured as a threaded hole. In other embodiments, the secure connection can also be achieved through a snap-fit ​​fit, where one of the first plate 110 and the end plate 500 has a snap-fit ​​portion, and the other has a snap-fit ​​groove that mates with the snap-fit ​​portion.

[0045] In some embodiments, both the first plate 110 and the second plate 130 are configured as strip structures extending along the first direction 910. This ensures both the accurate positioning of the first plate 110 in the first direction 910 and the ability of the second plate 130 to support and position all battery cells in the battery cell assembly 300. Furthermore, the first plate 110 is provided with through holes 113 extending along the first direction 910 to reduce weight and save material, while also improving air circulation and enhancing the heat dissipation efficiency of the battery cells.

[0046] In summary, the embodiments of the present invention provide a battery module 10, a battery pack and an electrical device, wherein the battery module 10 includes a pressure plate 100, a battery cell assembly 300 and two end plates 500. The two end plates 500 are spaced apart along a first direction 910; all battery cell assemblies 300 are clamped between the two end plates 500 and spaced apart along a second direction 930 perpendicular to the first direction 910. It can be understood that by clamping and positioning with the end plates 500, it can be ensured that the battery cell assembly 300 as a whole can be accurately placed in a predetermined position. On the basis of the above, the pressure plate 100 includes a first plate body 110 and a second plate body 130 connected to each other. The second plate body 130 is located above the battery cell assembly 300 and abuts against the battery cell assembly 300 to ensure that the battery cell assembly 300 is stably clamped up and down. The first plate 110 is located on one side of the battery cell assembly 300 and serves as a positioning reference surface to ensure that the multiple battery cells in the battery cell assembly 300 are arranged in an orderly manner, thereby accurately improving the positioning accuracy of each battery cell.

[0047] It should be noted that, unless there is any conflict, the features in the embodiments of this application can be combined with each other.

[0048] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery module, characterized in that: The battery cell assembly (300) comprises a pressing plate (100), a battery cell assembly (300), and two end plates (500); the two end plates (500) are spaced apart along a first direction (910); all the battery cell assemblies (300) are clamped between the two end plates (500), and are spaced apart along a second direction (930) perpendicular to the first direction (910); The pressing plate (100) comprises a first plate body (110) and a second plate body (130) connected to each other, wherein the first plate body (110) is located on one side of the battery cell assembly (300), and two ends thereof are respectively connected to the two end plates (500); and the second plate body (130) is located above the battery cell assembly (300) and abuts against the battery cell assembly (300).

2. The battery module according to claim 1, wherein: The number of the battery cell assemblies (300) is at least two, the second plate body (130) comprises a first abutting portion (131) and a second abutting portion (133) connected to each other, and the first plate body (110) is vertically connected to the connection between the first abutting portion (131) and the second abutting portion (133); In two adjacent battery cell assemblies (300), the first abutting portion (131) abuts against one of the battery cell assemblies (300), the second abutting portion (133) abuts against the other battery cell assembly (300), and the first plate (110) is located between the two battery cell assemblies (300).

3. The battery module according to claim 1, wherein: The first plate (110) and the second plate (130) are both configured as strip structures extending along the first direction (910), and the first plate (110) is provided with a through hole (113) extending along the first direction (910).

4. The battery module according to claim 1, wherein: The first plate body (110) and the second plate body (130) are both made of aluminum profiles, and the first plate body (110) and the second plate body (130) are integrally formed.

5. The battery module according to any one of claims 1 to 4, characterized in that: The battery module (10) further includes a fastener (700), the end plate (500) is provided with a first positioning hole (510), the first plate body (110) is provided with a second positioning hole (111), the first positioning hole (510) and the second positioning hole (111) are correspondingly arranged and both cooperate with the fastener (700).

6. The battery module according to any one of claims 1 to 4, characterized in that: One of the first plate body (110) and the end plate (500) is provided with a clamping portion, and the other is provided with a clamping groove matched with the clamping portion.

7. The battery module according to any one of claims 1 to 4, characterized in that: The battery module (10) further comprises two side plates, which are spaced apart along the second direction (930) and are arranged together with the two end plates (500) to form an accommodating space, wherein the battery cell assemblies (300) are all located in the accommodating space.

8. The battery module according to any one of claims 1 to 4, characterized in that: The battery module (10) further comprises a cable tie, which is used to bundle the two battery core assemblies (300) and the two end plates (500) into one.

9. A battery pack, characterized in that: It comprises the battery module (10) according to any one of claims 1 to 8 and a shell, wherein the battery module (10) is located inside the shell.

10. An electrical device, characterized in that: The device comprises the battery pack according to claim 9 and a device body, wherein the battery pack is electrically connected to the device body.

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