Battery cover plate formed by welding pole columns
By improving the upper plastic structure of the battery cover and the design of the terminal posts, separate injection molding of the upper plastic and integral molding of the terminal posts were achieved, solving the problems of low encapsulation efficiency and complex processing in the existing technology and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 郑州广源电池材料有限公司
- Filing Date
- 2025-05-28
- Publication Date
- 2026-05-19
AI Technical Summary
The existing battery cover has low efficiency and complex processing technology for applying plastic coating between the terminal post and the terminal post hole, resulting in high cost and insufficient market competitiveness.
The improved plastic structure reduces its volume, allowing for individual injection molding and eliminating the overmolding process. The improved electrode structure also removes the peripheral teeth, enabling one-piece molding of the electrode and simplifying the production process.
It improves the molding efficiency of the plastic, simplifies the production process of the pole, and reduces production costs.
Smart Images
Figure CN224264148U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of battery accessory manufacturing technology, specifically relating to a battery cover plate formed by welding electrode posts. Background Technology
[0002] The battery cover is a core safety component of lithium batteries, located on top of the battery, and performs critical functions such as sealing, explosion protection, conductivity, and heat dissipation. Its main structure includes: a sealing layer, laser-welded to the casing to ensure the electrolyte inside the battery does not leak out and to isolate external contaminants such as moisture and dust; a safety protection component, an explosion-proof plate, which ruptures at the scored points when the internal pressure of the battery exceeds 0.4-0.8 MPa to release pressure and prevent explosion; terminals, connecting the internal and external circuits of the battery; the positive terminal is made of aluminum, and the negative terminal uses a copper-aluminum composite material to reduce electrolytic corrosion; and a heat dissipation design, with some covers integrating heat dissipation holes or thermal conductive structures to help control the battery temperature during high-load operation.
[0003] In existing technologies, the upper terminal post and terminal post hole of the battery cover require plastic wrapping. To ensure strength, a large amount of plastic wrapping is needed, resulting in a large volume and low wrapping efficiency. Furthermore, existing terminal posts have peripheral teeth to prevent rotation, which require precision machining during production, making the process complex and costly. Currently, the market is becoming increasingly competitive, with prices being driven lower and lower. To save on production costs, a new type of battery cover structure is needed. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a battery cover plate formed by welding the electrode post, thus solving the problems mentioned in the background art.
[0005] The purpose of this utility model is achieved as follows: A battery cover plate formed by welding electrode posts includes a cover plate body. The cover plate body has a positive electrode hole, a negative electrode hole, and an explosion-proof hole on its surface. A positive electrode post is disposed inside the positive electrode hole, a negative electrode post is disposed inside the negative electrode hole, and an explosion-proof sheet is disposed inside the explosion-proof hole. Each positive or negative electrode post includes a flat column section, and a peripheral lug is fixedly disposed at the end of the flat column section. An upper plastic layer is disposed above the positive or negative electrode hole. The upper plastic layer includes a ring body, and a corresponding annular protrusion is fixedly connected to the ring body. By improving the structure of the upper plastic layer, its volume is reduced, allowing it to be injection molded separately, eliminating the original encapsulation process and improving work efficiency. By improving the structure of the electrode posts and removing the peripheral teeth of the original electrode posts, the electrode post production process is simplified, production efficiency is improved, and costs are reduced.
[0006] Furthermore, a lower plastic sheet is provided below the cover plate body. A positive sealing ring is provided between the positive terminal and the positive terminal hole, and a negative sealing ring is provided between the negative terminal and the negative terminal hole. A faceplate is provided above the explosion-proof hole. Both the positive and negative terminals are integrally molded, and the upper plastic sheet is integrally molded. A gasket is provided below both the positive and negative terminals, and the gasket is laser-welded to the lower end of the positive or negative terminal.
[0007] The beneficial effects of this utility model are as follows: Compared with the prior art, by improving the structure of the upper plastic, the volume of the upper plastic is reduced, allowing it to be injection molded separately, eliminating the overmolding process in the original production process, and improving work efficiency. By improving the structure of the electrode post and removing the peripheral teeth of the original electrode post, the electrode post production process is simplified, production efficiency is improved, and costs are reduced. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of a battery cover structure in the prior art;
[0009] Figure 2 yes Figure 1 Enlarged view of A in the middle;
[0010] Figure 3 This is a schematic diagram of the pole structure in existing technology;
[0011] Figure 4 This is a schematic diagram of the battery cover structure of this utility model;
[0012] Figure 5 yes Figure 4 Enlarged view of B in the middle;
[0013] Figure 6 This is a schematic diagram of the pole structure of this utility model.
[0014] In the diagram: 1. Cover plate body, 2. Positive electrode hole, 3. Negative electrode hole, 4. Explosion-proof hole, 5. Positive electrode post, 6. Negative electrode post, 7. Flat column body, 8. Peripheral lug, 9. Upper plastic, 10. Ring protrusion, 11. Lower plastic, 12. Negative electrode sealing ring, 13. Surface sticker, 14. Gasket. Detailed Implementation
[0015] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that all directional terms such as up, down, front, back, left, and right appearing in the present invention are not intended to limit the present invention, but are only used to more clearly explain and interpret the present invention. Example
[0016] like Figure 4-6As shown, this embodiment discloses a battery cover plate formed by welding electrode posts, including a cover plate body. The cover plate body has a positive electrode hole, a negative electrode hole, and an explosion-proof hole on its surface. A positive electrode post is disposed inside the positive electrode hole, a negative electrode post is disposed inside the negative electrode hole, and an explosion-proof sheet is disposed inside the explosion-proof hole. Each positive or negative electrode post includes a flat column section, and a peripheral lug is fixedly disposed at the end of the flat column section. An upper plastic layer is disposed above the positive or negative electrode hole, and the upper plastic layer includes a ring body. A ring protrusion corresponding to the peripheral lug is fixedly connected to the ring body. By improving the structure of the upper plastic layer, its volume is reduced, allowing it to be injection molded separately, eliminating the original encapsulation process and improving work efficiency. By improving the structure of the electrode posts and removing the peripheral teeth of the original electrode posts, the electrode post production process is simplified, production efficiency is improved, and costs are reduced. Example
[0017] like Figure 4-6 As shown, this embodiment discloses a battery cover plate formed by welding electrode posts, including a cover plate body. The cover plate body has a positive electrode hole, a negative electrode hole, and an explosion-proof hole on its surface. A positive electrode post is disposed inside the positive electrode hole, a negative electrode post is disposed inside the negative electrode hole, and an explosion-proof sheet is disposed inside the explosion-proof hole. Each positive or negative electrode post includes a flat column section, and a peripheral lug is fixedly disposed at the end of the flat column section. An upper plastic layer is disposed above the positive or negative electrode hole, and the upper plastic layer includes a ring body. A ring protrusion corresponding to the peripheral lug is fixedly connected to the ring body. By improving the structure of the upper plastic layer, its volume is reduced, allowing it to be injection molded separately, eliminating the original encapsulation process and improving work efficiency. By improving the structure of the electrode posts and removing the peripheral teeth of the original electrode posts, the electrode post production process is simplified, production efficiency is improved, and costs are reduced.
[0018] For better performance, a lower plastic layer is provided below the cover plate body. A positive sealing ring is provided between the positive terminal and the positive terminal hole, and a negative sealing ring is provided between the negative terminal and the negative terminal hole. A faceplate is provided above the explosion-proof hole. Both the positive and negative terminals are integrally molded, as is the upper plastic layer. A gasket is provided below both the positive and negative terminals, and the gasket is laser-welded to the lower end of the positive or negative terminal.
[0019] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A battery cover plate formed by welding electrode posts, comprising a cover plate body, wherein a positive electrode hole, a negative electrode hole, and an explosion-proof hole are formed on the surface of the cover plate body, a positive electrode post is disposed inside the positive electrode hole, a negative electrode post is disposed inside the negative electrode hole, and an explosion-proof sheet is disposed inside the explosion-proof hole, characterized in that: The positive or negative terminal includes a flat column, and a peripheral lug is fixedly provided at the end of the flat column. An upper plastic is provided above the positive or negative terminal hole, and the upper plastic includes a ring, and an annular protrusion corresponding to the peripheral lug is fixedly connected to the ring.
2. The battery cover plate formed by welding the electrode posts according to claim 1, characterized in that: A lower plastic sheet is provided below the cover plate body.
3. The battery cover plate formed by welding the electrode posts according to claim 1, characterized in that: A positive electrode sealing ring is provided between the positive electrode post and the positive electrode hole, and a negative electrode sealing ring is provided between the negative electrode post and the negative electrode hole.
4. The battery cover plate formed by welding the electrode posts according to claim 1, characterized in that: A faceplate is provided above the explosion-proof hole.
5. The battery cover plate formed by welding the electrode posts according to claim 1, characterized in that: Both the positive and negative terminals are integrally molded, and the upper plastic is integrally molded.
6. The battery cover plate formed by welding the electrode posts according to claim 1, characterized in that: A gasket is provided below both the positive and negative electrode holes, and the gasket is laser-welded to the lower end of the positive or negative electrode post.