End plate assembly for battery module, battery module and power battery
By using a combination of metal parts and plastic parts in the end plate structure of the battery module, combined with an elastic structure and a buckle structure, the problems of heavy weight and high cost of the existing end plate structure are solved, and weight reduction and cost reduction are achieved. effect while avoiding unnecessary heat transfer.
Patent Information
- Application Number
- CN202420024121.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-04
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-01-04
AI Technical Summary
The end plate structure of existing power battery modules uses aluminum profiles or aluminum die castings, resulting in larger weight and higher cost.
Design a battery module for a end plate component, which adopts a combination of metal parts and plastic parts. The metal or plastic parts are provided with connectors to connect to the positive output end of the battery structure and the negative output end electrical connection. With the buckle structure, the disassembly connection is implemented.
Through the combination of metal parts and plastic parts, the weight and cost are reduced; due to the poor thermal conductivity of plastic parts, heat transfer between the cell structure and the outside world is avoided, reducing the need for insulation materials.
Smart Images
Figure CN222394944U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, and in particular to an end plate assembly for a battery module, a battery module and a power battery. Background Art
[0002] At present, the end plate structure of the existing power battery module is generally an aluminum profile or an aluminum die-casting. The aluminum profile or the aluminum die-casting is heavy, resulting in a heavy weight of the end plate structure as a whole. In addition, since metal materials have good electrical conductivity, in order to prevent heat exchange between the battery cell structure and the outside world, it is also necessary to place insulation material between the end plate structure and the battery cell structure, which leads to higher overall costs. Utility Model Content
[0003] The main purpose of the utility model is to provide an end plate assembly for a battery module, a battery module and a power battery, which can solve the problem that the end plate structure in the prior art is heavy and costly due to the use of aluminum profiles or aluminum die-castings.
[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, an end plate assembly for a battery module is provided, and the end plate assembly for a battery module is used to cover one end of a battery cell structure, and the end plate assembly for a battery module comprises: a metal part; a plastic part, connected to the metal part; wherein the metal part or the plastic part has two connection terminals that can be electrically connected to the positive output terminal and the negative output terminal of the battery cell structure respectively.
[0005] Furthermore, the end plate assembly for the battery module also includes a connection base connected to the plastic component, two connection ends are formed on the connection base, and the connection base is located on a side of the plastic component facing the metal component.
[0006] Furthermore, there is a gap between the metal part and the plastic part, and the end plate assembly for the battery module also includes an elastic structure, which is located in the gap and connected to the metal part and / or the plastic part. The elastic structure is constructed to be able to deform along the stacking direction of the metal part and the plastic part under the action of external force.
[0007] Furthermore, the elastic structure includes an elastic member directly or indirectly connected to the plastic member, the elastic member is arranged obliquely relative to the plastic member, and the elastic member has a first position forming an angle with the plastic member and a second position abutting against the plastic member.
[0008] Furthermore, the end plate assembly for the battery module includes a plurality of elastic structures, and at least two of the plurality of elastic structures are arranged at intervals along the first direction.
[0009] Furthermore, the end plate assembly for the battery module also includes a snap-fit structure, which is used to detachably connect the metal part and the plastic part.
[0010] Furthermore, the snap-fit structure includes a snap-fitting piece and a snap-fitting hole capable of snapping with the snap-fitting piece, the snap-fitting piece is connected to one of the metal piece and the plastic piece, and the snap-fitting hole is provided on the other of the metal piece and the plastic piece.
[0011] Furthermore, the clip-on component includes a main body and an elastic clip-on portion arranged at one end of the main body. The elastic clip-on portion and the main body are arranged in sequence from close to the clip-on hole to away from the clip-on hole. The maximum outer diameter of the elastic clip-on portion is larger than the outer diameter of the main body, and the elastic clip-on portion is constructed to be able to undergo elastic deformation under the action of external force.
[0012] According to another aspect of the utility model, a battery module is provided, comprising the above-mentioned end plate assembly for the battery module and a battery cell structure, wherein the end plate assemblies for the battery module are provided at opposite ends of the battery cell structure, and the positive output end and the negative output end of the battery cell structure are electrically connected to the end plate assemblies for the battery module respectively.
[0013] According to another aspect of the present invention, a power battery is provided, comprising a battery pack and the above-mentioned battery module arranged in the battery pack.
[0014] By applying the technical solution of the utility model, a positive connection terminal for electrically connecting to the positive output terminal and a negative connection terminal for electrically connecting to the negative output terminal are provided on the plastic part. Compared with the aluminum profile or aluminum die-casting used in the prior art, the weight is smaller through the combination of the metal part and the plastic part. The plastic part is located between the metal part and the battery cell structure. Since the plastic part has a slow thermal conductivity, heat transfer between the battery cell structure and the outside world can be avoided. In this way, there is no need to set up thermal insulation materials, which can reduce the overall cost of the end plate assembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0016] In the figure:
[0017] Figure 1 A schematic structural diagram of an end plate assembly for a battery module according to an embodiment of the utility model is shown;
[0018] Figure 2 Shows Figure 1 A top view of an end plate assembly for a battery module;
[0019] Figure 3 A schematic structural diagram of a battery module according to an embodiment of the utility model is shown.
[0020] The above drawings include the following reference numerals:
[0021] 1. Battery cell; 3. End plate assembly for battery module; 31. Metal parts; 32. Plastic parts; 321. Connecting base; 322. Elastic structure; 323. Snap-on parts; 326. Elastic parts. DETAILED DESCRIPTION
[0022] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0023] See also Figure 1 As shown, the utility model provides an end plate assembly for a battery module, including: the end plate assembly for a battery module is used to cover one end of a battery cell structure, and the end plate assembly for a battery module includes: a metal part 31; a plastic part 32, connected to the metal part 31; wherein the metal part 31 or the plastic part 32 has two connection ends that can be electrically connected to the positive output end and the negative output end of the battery cell structure respectively.
[0024] Through the above-mentioned arrangement, a positive connection terminal for electrically connecting to the positive output terminal and a negative connection terminal for electrically connecting to the negative output terminal are provided on the plastic part 32. Compared with the aluminum profile or aluminum die-casting used in the prior art, the weight is smaller through the combination of the metal part 31 and the plastic part 32. The plastic part 32 is located between the metal part 31 and the battery cell structure. Since the plastic part 32 has a slow thermal conductivity, heat transfer between the battery cell structure and the outside world can be avoided. In this way, there is no need to set up thermal insulation materials, which can reduce the overall cost of the end plate assembly.
[0025] like Figure 1 As shown, in an embodiment of the present invention, the end plate assembly for the battery module also includes a connection base 321 connected to the plastic part 32 , two connection ends are formed on the connection base 321 , and the connection base 321 is located on the side of the plastic part 32 facing the metal part 31 .
[0026] In the above technical solution, both the positive electrode connection terminal and the negative electrode connection terminal are arranged on the connection base 321, the connection base 321 is an injection-molded nut insert or a bolt insert, and the connection base 321 and the plastic part 32 are integrally formed. Compared with the connection base in the prior art which is a separate plastic part with an insert, the connection base 321 of the present application is located between the metal part 31 and the plastic part 32, which saves space and has lower costs.
[0027] like Figure 1 and Figure 2As shown, in an embodiment of the utility model, there is a gap between the metal part 31 and the plastic part 32, and the end plate assembly for the battery module also includes an elastic structure 322, the elastic structure 322 is located in the gap and is connected to the metal part 31 and / or the plastic part 32, and the elastic structure 322 is constructed to be able to deform along the stacking direction of the metal part 31 and the plastic part 32 under the action of external force.
[0028] Through the above arrangement, when the cell structure is charged or discharged, the cell structure expands and squeezes the end plate components at both ends, and the elastic structure 322 is squeezed and deformed to provide the plastic part 32 with space to move toward the metal part 31, thereby meeting the expansion space requirements of the cell structure and improving the cell expansion cycle life. Compared with the solution in the prior art that sets the end plate spacer as a high-rebound material, the present application can also meet the expansion space requirements of the cell, while at a lower cost.
[0029] like Figure 1 and Figure 2 As shown, in an embodiment of the present utility model, the elastic structure 322 includes an elastic member 326 directly or indirectly connected to the plastic member 32. The elastic member 326 is tilted relative to the plastic member 32. The elastic member 326 has a first position at an angle to the plastic member 32 and a second position in contact with the plastic member 32.
[0030] Through the above arrangement, when the elastic member 326 is not subjected to the extrusion force, the elastic member 326 is in the first position. After being subjected to the extrusion force, the elastic member 326 is deformed, and the plastic member 32 is fitted toward the side where the metal member 31 is located. At this time, at least part of the structure of the elastic member 326 can fit with the plastic member 32 and is in the second position.
[0031] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the end plate assembly for a battery module includes a plurality of elastic structures 322 , and at least two of the plurality of elastic structures 322 are arranged at intervals along a first direction.
[0032] In the above technical solution, along the first direction, the plurality of elastic structures 322 are arranged at intervals, and along the second direction having an angle with the first direction, the plurality of elastic structures 322 are arranged at intervals.
[0033] like Figure 1 As shown, in an embodiment of the present utility model, the end plate assembly for the battery module further includes a snap-fit structure, and the snap-fit structure is used to detachably connect the metal part 31 and the plastic part 32 .
[0034] Through the above arrangement, the metal component 31 and the plastic component 32 can be detachably connected, which is convenient for installation.
[0035] like Figure 1As shown, in an embodiment of the utility model, the snap-fit structure includes a snap-fit component 323 and a snap-fit hole that can be snap-fitted with the snap-fit component 323, the snap-fit component 323 is connected to one of the metal component 31 and the plastic component 32, and the snap-fit hole is opened on the other of the metal component 31 and the plastic component 32.
[0036] In the above technical solution, the clamping member 323 is connected to the plastic member 32 , the clamping hole is provided on the metal member 31 , and the clamping member 323 is clamped and matched with the clamping hole, so that the metal member 31 and the plastic member 32 are detachably connected.
[0037] In an embodiment of the utility model, the clamping member 323 includes a main body and an elastic clamping portion arranged at one end of the main body. The elastic clamping portion and the main body are arranged in sequence from close to the clamping hole to away from the clamping hole. The maximum outer diameter of the elastic clamping portion is larger than the outer diameter of the main body, and the elastic clamping portion is constructed to be able to undergo elastic deformation under the action of external force.
[0038] In the above technical solution, the main body is a cylinder, the elastic clamping part is a conical structure, the elastic clamping part and the main body together form an "arrow" shape, and the maximum outer diameter of the elastic clamping part is larger than the inner diameter of the clamping hole, so that when the clamping part 323 is matched with the clamping hole, the elastic clamping part can be interference fit with the clamping hole, thereby realizing the clamping.
[0039] like Figure 3 As shown, the utility model also provides a battery module, including the above-mentioned battery module end plate assembly 3 and a battery cell structure, the battery module end plate assemblies 3 are provided at opposite ends of the battery cell structure, and the positive output end and the negative output end of the battery cell structure are electrically connected to the battery module end plate assembly 3 respectively.
[0040] In the above technical solution, the battery cell structure includes a plurality of battery cells 1, and the plurality of battery cells 1 are connected in series and in parallel via a bus to form the battery cell structure.
[0041] The battery module of the utility model has all the technical features and all the technical effects of the end plate assembly for the battery module mentioned above, which will not be described in detail here.
[0042] The utility model also provides a power battery, comprising a battery pack and the above-mentioned battery module arranged in the battery pack.
[0043] The power battery of the present invention has all the technical features and all the technical effects of the above-mentioned battery module, which will not be described in detail here.
[0044] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: a positive connection terminal for electrically connecting to the positive output terminal and a negative connection terminal for electrically connecting to the negative output terminal are provided on the plastic part, and the weight is smaller than that of aluminum profiles or aluminum die-castings used in the prior art through the combination of metal parts and plastic parts; the plastic part is located between the metal part and the battery cell structure, and due to the slow thermal conductivity of the plastic part, heat transfer between the battery cell structure and the outside world can be avoided, so there is no need to set up thermal insulation materials, which can reduce the overall cost of the end plate assembly.
[0045] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0047] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. An end plate assembly for a battery module, characterized in that: The end plate assembly for the battery module is used to cover one end of the battery core structure, and the end plate assembly for the battery module includes: Metal parts (31); A plastic part (32) connected to the metal part (31); The metal part (31) or the plastic part (32) has two connection ends that can be electrically connected to the positive output end and the negative output end of the battery cell structure respectively.
2. The end plate assembly for a battery module according to claim 1, characterized in that: The battery module end plate assembly further comprises a connection base (321) connected to the plastic part (32), the two connection ends are formed on the connection base (321), and the connection base (321) is located on a side of the plastic part (32) facing the metal part (31).
3. The end plate assembly for a battery module according to claim 1, characterized in that: There is a gap between the metal part (31) and the plastic part (32), and the end plate assembly for the battery module also includes an elastic structure (322). The elastic structure (322) is located in the gap and is connected to the metal part (31) and / or the plastic part (32). The elastic structure (322) is constructed to be able to deform along the stacking direction of the metal part (31) and the plastic part (32) under the action of an external force.
4. The end plate assembly for a battery module according to claim 3, characterized in that: The elastic structure (322) comprises an elastic member (326) directly or indirectly connected to the plastic member (32); the elastic member (326) is arranged obliquely relative to the plastic member (32); the elastic member (326) has a first position forming an angle with the plastic member (32) and a second position abutting against the plastic member (32).
5. The end plate assembly for a battery module according to claim 3, characterized in that: The battery module end plate assembly comprises a plurality of the elastic structures (322), and at least two of the plurality of the elastic structures (322) are arranged at intervals along a first direction.
6. The end plate assembly for a battery module according to any one of claims 1 to 5, characterized in that: The battery module end plate assembly further comprises a buckle structure, wherein the buckle structure is used to detachably connect the metal part (31) and the plastic part (32).
7. The end plate assembly for a battery module according to claim 6, characterized in that: The snap-fit structure comprises a snap-fitting piece (323) and a snap-fitting hole capable of snapping with the snap-fitting piece (323); the snap-fitting piece (323) is connected to one of the metal piece (31) and the plastic piece (32); and the snap-fitting hole is provided on the other of the metal piece (31) and the plastic piece (32).
8. The end plate assembly for a battery module according to claim 7, characterized in that: The clamping member (323) comprises a main body and an elastic clamping portion arranged at one end of the main body, and the elastic clamping portion and the main body are arranged in sequence from the direction close to the clamping hole to the direction away from the clamping hole. The maximum outer diameter of the elastic clamping portion is greater than the outer diameter of the main body, and the elastic clamping portion is constructed to be able to undergo elastic deformation under the action of an external force.
9. A battery module, characterized in that: It comprises the end plate assembly (3) for a battery module and a battery cell structure as described in any one of claims 1 to 8, wherein the end plate assembly (3) for the battery module is provided at both opposite ends of the battery cell structure, and the positive output terminal and the negative output terminal of the battery cell structure are electrically connected to the end plate assembly (3) for the battery module, respectively.
10. A power battery, characterized in that: The invention comprises a battery pack and the battery module according to claim 9 arranged in the battery pack.