Module end plate, battery module, battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a module end plate, a battery module, a battery pack and electric equipment, and the module end plate comprises a main body used for fixing at least one end of a plurality of stacked battery cells; the at least one connecting piece is integrally connected with the main body, and the connecting piece is used for connecting two adjacent battery cells in series. According to the utility model, the connecting piece is integrally connected with the main body, so that the connecting piece is integrated on the main body to realize the integrated design of the module end plate, and when the battery module is assembled, only the module end plate needs to be fixed at at least one end of the battery cell, and the connecting pieces do not need to be manually mounted one by one, so that the time for mounting the connecting pieces is saved; the assembling efficiency of the battery module is improved, and the labor cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a module end plate, a battery module, a battery pack and an electrical equipment. Background Art

[0002] The battery module in the prior art is composed of battery cells, a module end plate and connecting pieces. Structures such as supporting seats and buckles for installing the connecting pieces are arranged on the module end plate.

[0003] When assembling the above battery module, multiple battery cells are first stacked, then the module end plate is fixed at both ends of the battery cells, and then the connecting pieces are manually installed on the module end plate one by one.

[0004] In the above technical solution, the connecting pieces need to be manually installed one by one, and the installation time is long, resulting in low assembly efficiency of the battery module. Summary of the Utility Model

[0005] Embodiments of the utility model provide a module end plate, a battery module, a battery pack and an electrical equipment to solve the problem of low assembly efficiency of the battery module in the prior art.

[0006] Embodiments of the utility model provide a module end plate, which includes: a main body for fixing at least one end of a plurality of stacked battery cells; and at least one connecting piece integrally connected to the main body for connecting two adjacent battery cells in series.

[0007] Optionally, the connecting piece and the main body are integrally formed by insert molding.

[0008] Optionally, at least one first connecting structure is injection molded on the main body; the connecting piece is provided with a second connecting structure integrally connected to the first connecting structure.

[0009] Optionally, the first connecting structure includes a connecting portion integrally connected to the main body; the second connecting structure is a connecting hole, and the connecting portion is embedded in the connecting hole.

[0010] Optionally, the first connecting structure further includes a buffer portion in a bent shape, one end of the buffer portion is integrally connected to the main body, and the other end is integrally connected to the connecting portion.

[0011] Optionally, the connecting hole is arranged at the edge of the connecting piece.

[0012] Optionally, a positioning groove is arranged on the side of the connecting piece away from the main body for part of the connecting portion to be embedded.

[0013] Optionally, in a plane perpendicular to the first direction, the projection of the connecting hole along the first direction is located within the projection of the positioning groove along the first direction, and the first direction is parallel to the height direction of the pole column of the battery cell.

[0014] Optionally, the main body is provided with at least one installation groove, the installation groove penetrates the main body, the penetration direction of the installation groove is along the first direction, and each of the connecting pieces is integrally connected to a different installation groove respectively, and the first direction is parallel to the height direction of the pole column of the battery cell.

[0015] An embodiment of the present invention further provides a module end plate, which includes a battery cell and at least one of the above-mentioned module end plates, and the battery cells are stacked and connected to the module end plate.

[0016] An embodiment of the present invention further provides a battery pack, which includes the above-mentioned module end plate or the above-mentioned battery module.

[0017] An embodiment of the present invention further provides an electrical device, which includes the above-mentioned module end plate, battery module or battery pack.

[0018] Aiming at the prior art, the present invention has the following advantages:

[0019] 1. In the embodiment of the present invention, the connecting piece is integrally connected to the main body, so that the connecting piece is integrated on the main body to realize the integrated design of the module end plate. When assembling the battery module, it is only necessary to fix the module end plate to at least one end of the battery cell, and there is no need to install the connecting pieces one by one manually, thus saving the time for installing the connecting pieces, improving the assembly efficiency of the battery module, and saving labor costs.

[0020] 2. In the embodiment of the present invention, there is no need to provide complex structures such as support seats and buckles for installing connecting pieces on the main body of the module end plate, thus simplifying the structure of the module end plate, achieving the purpose of reducing processing costs, and being beneficial to the lightweight design of the battery module.

[0021] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments.

[0023] Figure 1 It is a schematic structural diagram of a module end plate provided by an embodiment of the present invention;

[0024] Figure 2 A structural schematic diagram of a main body provided by an embodiment of the present utility model;

[0025] Figure 3 A structural schematic diagram of a connecting member provided by an embodiment of the present utility model;

[0026] Figure 4 is Figure 1 A cross-sectional view of the structure of part A in along the B-B direction;

[0027] Figure 5 A structural schematic diagram of a battery module provided by an embodiment of the present utility model.

[0028] Explanation of reference numerals:

[0029] 1 - Main body; 11 - First connection structure; 111 - Connection part; 112 - Buffer part; 12 - Installation groove; 2 - Connecting member; 21 - Connection hole; 22 - Positioning groove; 23 - Contact part; 3 - Battery cell; X - First direction; Y - Second direction; Z - Third direction. Specific embodiments

[0030] Hereinafter, exemplary embodiments of the present utility model will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present utility model can be more thoroughly understood and the scope of the present utility model can be completely conveyed to those skilled in the art.

[0031] Referring to Figures 1-3 , an embodiment of the present utility model provides a module end plate, which includes: a main body 1 for fixing at least one end of a plurality of stacked battery cells; and at least one connecting member 2 integrally connected to the main body 1 for connecting two adjacent battery cells in series.

[0032] Specifically, the number of the connecting members 2 can be flexibly set according to the number of the battery cells 3. The connecting member 2 is made of metal, and the main body 1 can be made of resin. The connecting member 2 and the main body 1 can be integrally injection-molded or processed into one body by 3D printing technology. When 3D printing the module end plate, a 3D printing device with a dual nozzle or multiple nozzles can be selected to support the simultaneous printing of two materials.

[0033] In this embodiment, the main body 1 is used to fix one or both ends of a plurality of stacked battery cells 3. When pole posts are provided at both ends of the battery cell 3, at least two module end plates need to be provided, and each module end plate is used to fix one end of a battery cell 3; when the battery cell 3 is a VDA square battery cell, a pole post is provided only at one end, and at least one module end plate is used, and the module end plate fixes the end of the battery cell 3. The connecting member 2 is integrally connected to the main body 1, so that the connecting member 2 is integrated on the main body 1 to realize the integrated design of the module end plate. When assembling the battery module, only need to fix the module end plate at both ends of the battery cell, and there is no need for manual installation of connecting pieces one by one, thus saving the time for installing connecting pieces, improving the assembly efficiency of the battery module, and saving labor costs. In addition, there is no need to provide complex structures such as support seats and buckles for installing connecting pieces on the main body of the module end plate, thus simplifying the structure of the module end plate to achieve the purpose of reducing processing costs and facilitating the lightweight design of the battery module.

[0034] Optionally, the connecting member 2 and the main body 1 are integrally formed by insert injection molding.

[0035] Specifically, when injection molding the module end plate, first place the pre-prepared connecting member 2 in the mold, and then inject resin. The molten resin material is joined and cured with the connecting member 2 to form an integrated module end plate.

[0036] In this embodiment, the connecting member 2 and the main body 1 are integrally formed by injection molding, so that the connecting member 2 is integrated on the main body 1 to realize the integrated design of the module end plate. When assembling the battery module, only need to fix the module end plate at the end of the battery cell, and there is no need for manual installation of connecting pieces one by one, thus saving the time for installing connecting pieces, improving the assembly efficiency of the battery module, and saving labor costs. In addition, compared with the prior art, there is no need to provide complex structures such as support seats and buckles for installing connecting pieces on the main body 1 of the module end plate, thus simplifying the mold structure, reducing the mold forming difficulty, achieving the purpose of reducing processing costs, and facilitating the lightweight design of the battery module.

[0037] Optionally, referring to Figures 1-3 , at least one first connecting structure 11 is injection molded on the main body 1; the connecting member 2 is provided with a second connecting structure, and the second connecting structure is integrally connected to the first connecting structure 11.

[0038] Specifically, each connecting member 2 is provided with a second connecting structure, and the first connecting structure 11 and the second connecting structure are arranged in one-to-one correspondence. As Figure 1 shown, when the number of connecting members 2 is multiple, the multiple connecting members 2 can be arranged at equal intervals along the second direction Y.

[0039] In this embodiment, the first connection structure 11 and the second connection structure are integrally connected, so that the main body 1 and the connecting member 2 are combined into a whole to achieve the integrated design of the module end plate. When assembling the battery module, it is only necessary to fix the module end plate at both ends of the battery cell, and there is no need to manually install the connecting member 2 one by one, thus saving the time for installing the connecting member 2, improving the assembly efficiency of the battery module, and saving labor costs.

[0040] Optionally, referring to Figures 2-4 , the first connection structure 11 includes a connecting portion 111, and the connecting portion 111 is integrally connected with the main body 1; the second connection structure is a connection hole 21, and the connecting portion 111 is embedded in the connection hole 21.

[0041] Specifically, when injection molding the module end plate, the connecting member 2 is placed in the mold, so that the raw material liquid in the mold fills the connection hole 21. After the connecting portion 111 is cured, a part of the structure of the connecting portion 111 is embedded in the connection hole 21, so that the connecting member 2 and the main body 1 are combined into a whole.

[0042] It should be noted that the position of the connection hole 21 can be at the edge of the connecting member 2 or in the middle of the connecting member 2. Its specific position can be flexibly set according to the structure of the injection mold, as long as the positions of the first connection structure 11 and the second connection structure correspond to each other.

[0043] In addition, the connection hole 21 can be a through hole or a blind hole. When the connection hole 21 is a through hole, as shown in Figure 3 and Figure 4 , the middle part of the connecting portion 111 in the first direction X penetrates through the connection hole, so as to connect the main body 1 and the connecting member 2 into a whole. When the connection hole 21 is a blind hole, the connection hole 21 can be set as a tapered hole, so that the diameter of the connection hole 21 gradually increases from the opening to the bottom of the hole, thereby reducing the probability of the connecting portion 111 coming out of the connection hole 21 after the connecting portion 111 is cured.

[0044] In this embodiment, the connection hole 21 is provided on the connecting member 2. With the help of the connection hole 21, the connecting member 2 and the main body 1 are injection molded into one body, thus realizing the integrated design of the module end plate. Compared with the prior art, when assembling the battery module, it is only necessary to fix the module end plate at both ends of the battery cell, and there is no need to manually install the connecting member 2 one by one, thus saving the time for installing the connecting member 2, improving the assembly efficiency of the battery module, and saving labor costs. In addition, compared with the prior art, there is no need to provide complex structures such as a support seat and a buckle for installing the connecting member 2 on the main body 1 of the module end plate, thus simplifying the mold structure for injection molding the module end plate, reducing the mold forming difficulty, so as to achieve the purpose of reducing the processing cost, and being beneficial to the lightweight design of the battery module.

[0045] In some embodiments, the second connecting structure may also be a protruding portion at the edge of the connecting member 2. When the end plate of the injection molding module is formed, the protruding portion is embedded in the connecting portion 111, so that the main body 1 and the connecting member 2 can also be integrally injection molded.

[0046] Optionally, referring to Figures 2-4 , the first connecting structure 11 further includes a buffer portion 112. The buffer portion 112 is bent. One end of the buffer portion 112 is integrally connected to the main body 1, and the other end is integrally connected to the connecting portion 111.

[0047] Specifically, the buffer portion 112 is located at one end of the connecting member 2 along the third direction Z. Since the buffer portion 112 is bent and has a certain elasticity, the connecting member 2 can move slightly along the second direction Y or move slightly along the third direction Z to compensate for the installation tolerance, so that the connecting member 2 can be aligned with the pole of the battery cell, thereby improving the qualified rate of the battery module.

[0048] In some embodiments, as Figure 3 shown, two contact portions 23 are provided on the connecting member 2; the two contact portions 23 are spaced along the diagonal of the connecting member 2, and the contact portions 23 are used to contact and electrically connect with the poles of the battery cells. The contact portions 23 are oblong. When assembling the battery module, the two contact portions 23 respectively contact the poles of different battery cells to connect the two battery cells in series.

[0049] Optionally, referring to Figures 2-4 , the connecting hole 21 is provided at the edge of the connecting member 2.

[0050] Specifically, the connecting hole 21 is provided at the edge of the connecting member 2 so that the connecting hole 21 is close to the main body 1, thereby reducing the length of the first connecting structure 11, reducing the weight of the module end plate while reducing the processing cost. In addition, the shape of the connecting hole 21 can be circular or other polygons. The shape of the connecting hole 21 is not limited in this embodiment, and those skilled in the art can flexibly set it according to actual needs.

[0051] Optionally, referring to Figure 3 and Figure 4 , a positioning groove 22 is provided on the side of the connecting member 2 away from the main body 1, and the positioning groove 22 is used for part of the connecting portion 111 to be embedded.

[0052] Specifically, the positioning groove 22 is located on the side of the connecting member 2 away from the main body 1, and the position of the positioning groove 22 corresponds to the position of the connecting portion 111. When the end plate of the injection molding module is formed, the mold is abutted against the groove wall of the positioning groove 22, so that the connecting member 2 is aligned with the main body 1, thereby reducing the injection size deviation of the end plate of the module. In addition, the positioning groove 22 forms a space capable of accommodating a part of the connecting portion 111, thereby reducing the size of the connecting portion 111 along the first direction X, reducing the weight of the end plate of the module, and realizing the lightweight design of the end plate of the module.

[0053] Optionally, referring to Figure 3 and Figure 4 , in the plane perpendicular to the first direction X, the projection of the connecting hole 21 along the first direction X is located within the projection of the positioning groove 22 along the first direction X, and the first direction X is parallel to the height direction of the pole of the battery cell.

[0054] Specifically, the connecting hole 21 is located on the groove wall of the positioning groove 22 along the first direction X to reduce the size of the connecting hole 21 along the first direction X. While facilitating the machining of the connecting hole 21, the size of the connecting portion 111 along the first direction X can be reduced, thereby reducing the weight of the end plate of the module and realizing the lightweight design of the end plate of the module.

[0055] Optionally, referring to Figures 1-3 , the main body 1 is provided with at least one installation groove 12, the installation groove 12 penetrates through the main body 1, the penetration direction of the installation groove 12 is along the first direction X, and each connecting member 2 is integrally connected in a different installation groove 12, and the first direction X is parallel to the height direction of the pole of the battery cell.

[0056] Specifically, as Figure 2 shown, the main body 1 before integral injection molding has a through installation groove 12, and except for the first connection structure 11 area on the installation groove 12, it is arranged to penetrate through the main body 1 along the first direction X. The through installation groove 12 is in the shape of a frame structure, so that when assembling the battery module, it is convenient for the connecting member 2 and the main body 1 to form an integral structure and be in electrical contact with the pole of the battery cell 3. When the number of installation grooves 12 is multiple, the multiple installation grooves 12 are evenly arranged along the second direction Y. The number of installation grooves 12 is equal to the number of connecting members 2. As Figure 1 and Figure 4 shown, in the structure after integral injection molding, each installation groove 12 is integrally connected with a connecting member 2 embedded therein, and the shape of the installation groove 12 is similar to the shape of the connecting member 2. In this embodiment, the installation groove 12 forms a cavity for accommodating the connecting member 2, which plays a role in protecting and limiting the connecting member 2 while reducing the weight of the main body 1 to realize the lightweight design of the end plate of the module.

[0057] Referring to Figure 5, The embodiment of the present utility model further provides a battery module, which includes battery cells, at least one of the above-mentioned module end plates, and at least two battery cells 3. The battery cells 3 are stacked and connected to the module end plates.

[0058] Specifically, the number of battery cells 3 in the battery module can be flexibly set according to actual needs. As Figure 5 shown, in this embodiment, multiple battery cells 3 are taken as an example. The multiple battery cells 3 are stacked along the second direction Y. When only one end of the battery cell 3 is provided with a pole, at least one module end plate is fixed to the end of the battery cell 3, or the connection between the module end and the battery cell 3 is detachable. When pole columns are provided at both ends of each battery cell 3 along the first direction X, along the first direction X, all the pole columns at one end of the battery module are covered by the connecting member 2, and at the other end, except for the pole columns at both ends along the second direction Y, the remaining pole columns are covered by the connecting member 2, and the two uncovered pole columns serve as the current input end and output end of the entire battery module, thereby realizing the series connection of multiple battery cells 3. Each connecting member 2 can be in contact with the pole columns of at least one battery cell 3. In this embodiment, each connecting member is arranged to be in contact with the pole columns of two adjacent battery cells 3.

[0059] In this embodiment, applying the above-mentioned module end plate to the battery module can improve the assembly efficiency of the battery module and save labor costs. In addition, compared with the prior art, complex structures such as support seats and buckles for installing the connecting member 2 do not need to be provided on the main body 1 of the module end plate, thereby simplifying the structure of the module end plate to achieve the purpose of reducing processing costs and facilitating the lightweight design of the battery module.

[0060] The embodiment of the present utility model further provides a battery pack, which includes the above-mentioned module end plate or battery module.

[0061] Specifically, the battery pack includes a battery module and a battery pack box body, and the battery module is fixed in the battery pack box body. Applying the above-mentioned battery module to the battery pack can improve the assembly efficiency of the battery pack and save labor costs. In addition, compared with the prior art, complex structures such as support seats and buckles for installing the connecting member 2 do not need to be provided on the main body 1 of the module end plate, thereby simplifying the structure of the module end plate to achieve the purpose of reducing processing costs and facilitating the lightweight design of the battery pack.

[0062] The embodiment of the present utility model further provides an electrical device, which includes the above-mentioned module end plate, battery module, or battery pack.

[0063] The electrical device in this embodiment is a battery swapping station or a vehicle. The electrical device includes a battery pack and a charge-discharge conversion device. Specifically, applying the above-mentioned battery pack to the electrical device can improve the assembly efficiency of the electrical device and save labor costs. In addition, it can reduce the weight of the battery module, which is beneficial to the lightweight design of the vehicle when used in a vehicle.

[0064] Each embodiment in this specification is described in a related manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A module end plate, characterized in that, Comprising: A main body for fixing at least one end of a plurality of stacked battery cells; At least one connecting member integrally connected to the main body, the connecting member being used to connect two adjacent battery cells in series; The connecting member and the main body are integrally formed by insert molding.

2. The module end plate according to claim 1, wherein At least one first connecting structure is injection molded on the main body; The connecting member is provided with a second connecting structure, and the second connecting structure is integrally connected to the first connecting structure.

3. The module end plate according to claim 2, wherein, The first connecting structure includes a connecting portion integrally connected to the main body; The second connecting structure is a connecting hole, and the connecting portion is embedded in the connecting hole.

4. The module end plate according to claim 3, wherein The first connecting structure further includes a buffer portion, the buffer portion is bent, one end of the buffer portion is integrally connected to the main body, and the other end is integrally connected to the connecting portion.

5. The module end plate according to claim 3, characterized in that, The connecting hole is provided at the edge of the connecting member.

6. The module end plate according to claim 3, wherein A positioning groove is provided on a side of the connecting member away from the main body, and the positioning groove is used for part of the connecting portion to be embedded.

7. The module end plate according to claim 6, wherein In a plane perpendicular to the first direction, the projection of the connecting hole along the first direction is located within the projection of the positioning groove along the first direction, and the first direction is parallel to the height direction of the pole of the battery cell.

8. The module end plate according to claim 1, wherein, The main body is provided with at least one installation groove penetrating the main body, the penetration direction of the installation groove is along the first direction, and each connecting member is integrally connected in a different installation groove, and the first direction is parallel to the height direction of the pole of the battery cell.

9. A battery module, characterized in that, Comprising a battery cell and at least one module end plate according to any one of claims 1-8, the battery cells are stacked and connected to the module end plate.

10. A battery pack, characterized in that, Comprising the module end plate according to any one of claims 1-8 or the battery module according to claim 9.

11. An electrical device, characterized in that, Comprising the module end plate according to any one of claims 1-8, the battery module according to claim 9 or the battery pack according to claim 10.

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