Battery cover plate and battery
By setting through holes and a conductive coating on the battery cover, the problems of low space utilization and unstable conductive connection in the battery cover structure are solved, and the internal space of the battery cell is optimized and the conductive connection is stable.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 中汽新能(天津)电池科技有限公司
- Filing Date
- 2025-04-24
- Publication Date
- 2026-04-21
AI Technical Summary
In the existing battery cover structure, the insulation structure between the positive electrode adapter and the aluminum plate results in low utilization of the internal space of the battery cell and unstable conductive connection.
An installation through hole is set on the insulating plastic part, and the positive electrode adapter is directly connected to the light aluminum plate. A conductive coating is set on the adapter to achieve conductive connection. The conductive plastic part is eliminated, and the conductive path is optimized to positive electrode post - positive electrode adapter - conductive coating - light aluminum plate.
This improves the space utilization rate inside the battery cell, stabilizes the conductive connection, and avoids the problem of excessive resistance caused by the incomplete filling of conductive plastic parts.
Smart Images
Figure CN224153462U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery structure technology, specifically to a battery cover and a battery. Background Technology
[0002] The battery cover and positive electrode adapter are important structural components of a power battery. The positive electrode adapter is the connection structure that connects the electrode assembly to the positive terminal. In existing battery covers, the positive terminal and the aluminum plate can be configured with either an insulating or conductive structure. A conductive structure is achieved by placing a conductive polymer material between the positive terminal and the aluminum plate. Outside of the connection area, the area where the positive terminal and the positive electrode adapter are connected is insulated by a polymer material from the aluminum plate.
[0003] like Figures 1-3 As shown, this is an existing battery cover structure, which includes an aluminum plate a01, a positive electrode post a02, an insulating lower plastic part a03, a positive electrode adapter piece a04, and a conductive plastic part a05. In this structure, the insulating lower plastic part a03 isolates the positive electrode adapter piece a04 and the aluminum plate a01. Because the insulating lower plastic part a03 has a certain thickness, the position of the positive electrode adapter piece a04 is relatively low. In order to connect with the positive electrode adapter piece a04, the positive electrode post a02 needs to be set to a relatively long length. This structure occupies a lot of internal space of the battery cell, resulting in low utilization of the internal space of the battery cell. Utility Model Content
[0004] In view of the problem of low utilization rate of internal space of battery cells in existing battery cover structures as mentioned in the background art, the purpose of this application is to provide a battery cover and a battery.
[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:
[0006] First aspect
[0007] This application provides a battery cover plate, including an aluminum plate b, a positive electrode post b, an insulating lower plastic part b, and a positive electrode adapter piece b. The insulating lower plastic part b is provided with a mounting through hole, and the positive electrode adapter piece b is disposed in the mounting through hole and connected to the positive electrode post b.
[0008] The positive electrode adapter piece b has a gap of 0mm-1mm between its edge and the mounting through hole.
[0009] An insulating plastic component b is provided in the gap between the positive electrode post b and the aluminum plate b.
[0010] The positive electrode adapter piece b has a conductive coating b on its upper surface, and the positive electrode adapter piece b is electrically connected to the aluminum plate b through the conductive coating b.
[0011] The thickness of the conductive coating b is 0.05 mm to 1.0 mm.
[0012] The thickness of the conductive coating b is 0.1 mm to 0.5 mm.
[0013] The thickness of the conductive coating b is 0.1 mm to 0.3 mm.
[0014] The conductive coating b is made of a conductive polymer material.
[0015] The conductive coating b is made of polyphenylene sulfide.
[0016] Second aspect
[0017] This application provides a battery, including the aforementioned battery cover.
[0018] Compared with the prior art, this application has the following technical advantages:
[0019] This application removes the insulating lower plastic part b located between the positive electrode adapter piece b and the light aluminum plate b to form a mounting through hole. The positive electrode adapter piece b is set in the mounting through hole, so that the positive electrode adapter piece b is directly connected to the light aluminum plate b. This also reduces the height of the positive electrode post b, increases the usable space inside the cell, and improves the space utilization rate.
[0020] Furthermore, the conductive path between the positive electrode post b and the aluminum plate b no longer passes through the conductive plastic component a; in this application, the plastic component is an insulating plastic component b. This application provides a conductive coating b on the positive electrode adapter piece b, optimizing the conductive path from the prior art's "positive electrode post a - conductive plastic component a - aluminum plate a" to "positive electrode post b - positive electrode adapter piece b - conductive coating b - aluminum plate b." This effectively avoids the problem of unstable conductive connections caused by the conductive plastic component a's inability to completely fill the space between the positive electrode post a and the aluminum plate a, resulting in a large resistance range. Attached Figure Description
[0021] Figure 1 This is a bottom view of the battery cover structure in the prior art;
[0022] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;
[0023] Figure 3 for Figure 2 A magnified schematic diagram of a local structure;
[0024] In the diagram, the aluminum plate is a01, the positive electrode post is a02, the insulating plastic part is a03, the positive electrode adapter is a04, and the conductive plastic part is a05.
[0025] Figure 4 A bottom view of the battery cover provided in an embodiment of this application;
[0026] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure;
[0027] Figure 6 for Figure 5 A magnified schematic diagram of a local structure;
[0028] In the figure, there is an aluminum plate b11, a positive electrode post b12, an insulating lower plastic part b13, a positive electrode adapter piece b14, a conductive coating b15, an insulating plastic part b16, a gap a17, and a gap b18.
[0029] Figure 7 This is a schematic diagram of the first surface structure of the positive electrode adapter piece b;
[0030] Figure 8 This is a schematic diagram of the second surface structure of the positive electrode adapter piece b. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0033] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.
[0034] Please see Figures 4-8 The diagram shows the structure of an embodiment provided by this utility model.
[0035] Example 1
[0036] This embodiment provides a battery cover plate, including an aluminum plate b11, a positive electrode post b12, an insulating lower plastic part b13, and a positive electrode adapter piece b14. The insulating lower plastic part b13 is provided with a mounting through hole, and the positive electrode adapter piece b14 is disposed in the mounting through hole and connected to the positive electrode post b12.
[0037] The shape and size of the mounting through hole can be set in various styles, and there is a gap of 0mm-1mm between the edge of the positive electrode adapter piece b14 and the mounting through hole.
[0038] It should be noted that by assembling the insulating lower plastic part b13 with the positive electrode adapter piece b14, that is, removing the portion of the insulating lower plastic part b13 that originally existed between the positive electrode adapter piece b14 and the aluminum plate b11, the height of the positive electrode post b12 can be reduced, causing the lower edge plane of the positive electrode post b12 to move upward, thereby reducing the distance between the positive electrode adapter piece b14 and the aluminum plate b11. This allows the position of the positive electrode adapter piece b14 in the battery to be closer to the aluminum plate b11, thus leaving more usable space inside the battery.
[0039] For example, the thickness of the insulating lower plastic part b13 is 0.8mm, the thickness of the conductive coating b15 of the positive electrode adapter piece b14 is 300um, after the lower plastic between the positive electrode adapter piece b14 and the aluminum plate b11 is removed, the position of the positive electrode adapter piece b14 in the battery moves 0.8mm closer to the aluminum plate b11, the height of the positive electrode post b12 can be reduced by 0.8mm, so that the lower edge plane of the positive electrode post b12 moves upward by 0.8mm, and the internal height direction of the battery can be increased by 0.8mm.
[0040] Preferably, an insulating plastic component b16 is disposed in the gap between the positive electrode post b12 and the aluminum plate b11. A conductive coating b15 is disposed on the upper end surface of the positive electrode adapter piece b14, and the positive electrode adapter piece b14 is electrically connected to the aluminum plate b11 through the conductive coating b15.
[0041] It should be noted that the conductive path between the positive electrode post b12 and the aluminum plate b11 no longer passes through the conductive plastic part a05; the plastic part in this application is the insulating plastic part b13. This application provides a conductive coating b15 on the positive electrode adapter piece b14, optimizing the conductive path from "positive electrode post a - conductive plastic part a - aluminum plate a" in the prior art to "positive electrode post b12 - positive electrode adapter piece b14 - conductive coating b15 - aluminum plate b11." This effectively avoids the problem of unstable conductive connection caused by the conductive plastic part a failing to completely fill the space between the positive electrode post a and the aluminum plate a, resulting in a large resistance range. It also avoids the problem of unstable conductive connection caused by the insulating plastic part b13 failing to completely fill the gaps b17 and b18 between the aluminum plate b11 and the positive electrode post b12, resulting in a large resistance range.
[0042] It should be noted that the positive electrode adapter piece b14 includes a first surface and a second surface disposed opposite to each other; the conductive coating b15 is partially provided on the first surface.
[0043] The thickness of the conductive coating b15 is from 0.05 mm to 1.0 mm. The preferred range is 0.1 to 0.5 mm, and the most preferred range is 0.1 to 0.3 mm. The conductive coating is made of a conductive polymer material, including but not limited to polyphenylene sulfide.
[0044] Example 2
[0045] This embodiment provides a battery, including a battery cell and the battery cover plate of Embodiment 1 above, wherein the battery cover plate is disposed above the battery cell.
[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A battery cover plate comprising an aluminum plate b (11), a positive pole post b (12), an insulating lower plastic part b (13), and a positive pole adapter b (14), characterized in that, The insulating plastic part b (13) is provided with a mounting through hole, the positive electrode adapter piece b (14) is disposed in the mounting through hole, and the positive electrode adapter piece b (14) is connected to the positive electrode post b (12).
2. The battery cover plate of claim 1, wherein, The edge of the positive electrode adapter piece b (14) has a gap of 0 mm to 1 mm with the mounting through hole.
3. The battery cover plate of claim 1, wherein, An insulating plastic part b(16) is provided in the gap between the positive electrode post b(12) and the aluminum plate b(11).
4. The battery cover plate of claim 1, wherein, The upper surface of the positive electrode adapter piece b (14) is provided with a conductive coating b (15), and the positive electrode adapter piece b (14) is electrically connected to the light aluminum plate b (11) through the conductive coating b (15).
5. The battery cover plate of claim 4, wherein, The thickness of the conductive coating b(15) is 0.05 mm to 1.0 mm.
6. The battery cover plate of claim 4, wherein, The thickness of the conductive coating b(15) is 0.1 mm to 0.5 mm.
7. The battery cover plate of claim 4, wherein, The thickness of the conductive coating b(15) is 0.1 mm to 0.3 mm.
8. The battery cover plate of claim 4, wherein, The conductive coating b(15) is made of a conductive polymer material.
9. The battery cover plate of claim 4, wherein, The conductive coating b(15) is made of polyphenylene sulfide.
10. A battery, characterized by Includes the battery cover as described in any one of claims 1-9.