Top cover injection molding structure facilitating top patch positioning

Abstract

The utility model relates to a top cover injection molding structure more convenient for top patch positioning, and relates to the technical field of lithium battery production. The top cover comprises a top cover body, a positive pole and a negative pole are arranged on the surface of the top cover body, an anti-explosion valve is arranged between the positive pole and the negative pole, positioning holes are formed in the circle centers of the positive pole and the negative pole, and positioning lugs are arranged on the peripheral walls of the positive pole and the negative pole. The positioning lugs abut against the surface of the top cover body. The top cover pasting device has the advantages that the top cover can be conveniently positioned, and the pasting precision of the top paster is improved.

Description

Technical Field

[0001] This application relates to the field of lithium battery manufacturing technology, and in particular to a top cover injection molding structure that facilitates the positioning of the top patch. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloy as positive and negative electrode materials and a non-aqueous electrolyte solution. They have many advantages, such as high energy density, long service life, low self-discharge rate, and strong adaptability, and are widely used in industrial production, automobile manufacturing, and other fields. As an indispensable part of lithium-ion batteries, the top cover needs to be attached with a top patch (i.e., an insulating sheet) during production. This process requires the use of automated production lines to attach the top patch to the lithium-ion battery top cover. However, due to the limited number of positioning points on the top cover, the four corners of the aluminum shell top are basically used as positioning points during the attachment process. This positioning position is relatively broad and lacks precision. Sometimes, the top patch is misaligned, resulting in part of the explosion-proof valve being covered. If the explosion-proof valve opening of the top patch is increased, more of the bare aluminum plate will be exposed, affecting the appearance and aesthetics. Therefore, this needs to be improved. Utility Model Content

[0003] To facilitate the positioning of the top cover and improve the adhesion accuracy of the top patch, this application provides a top cover injection molding structure that makes it easier to position the top patch.

[0004] The top cover injection molding structure provided in this application, which facilitates the positioning of the top patch, adopts the following technical solution:

[0005] A top cover injection molding structure that facilitates the positioning of the top patch includes a top cover body. The surface of the top cover body is provided with a positive terminal and a negative terminal. An explosion-proof valve is provided between the positive terminal and the negative terminal. A positioning hole is opened at the center of each of the positive terminal and the negative terminal. A positioning ear is provided on the peripheral wall of each of the positive terminal and the negative terminal. The positioning ear abuts against the surface of the top cover body.

[0006] By adopting the above technical solution, by opening positioning holes and setting positioning ears, the top patch can be attached using the positioning holes and positioning ears as positioning points. This not only protects the appearance of the product, but also makes the attachment of the top patch more accurate, thereby improving the yield of the automated production line.

[0007] Optionally, the surface of the top cover body is provided with positioning grooves for installing the positive and negative terminals.

[0008] By adopting the above technical solution and opening positioning grooves, a detachable connection is formed between the top cover body and the positive and negative terminals. This allows for the selection of positive and negative terminals with positioning ears of corresponding sizes according to different specifications of top patches, thereby improving the applicability and flexibility of the top cover body.

[0009] Optionally, one side of the positioning groove is provided with an identification groove for distinguishing the installation positions of the positive and negative terminals.

[0010] By adopting the above technical solution, the identification groove can improve the installation accuracy and efficiency of the positive and negative terminals, save the time of assembling the top cover body, and improve production efficiency.

[0011] Optionally, both the positive and negative terminals have identification protrusions on their surfaces.

[0012] By adopting the above technical solution, the identification protrusions serve to distinguish the positions of the positive and negative terminals of the top cover body. By matching the identification grooves with the identification protrusions, the staff can quickly install the terminals, thus enabling the staff to place the top cover body on the automated production line in the correct direction, reducing the probability of the top patch being applied backwards, and helping to further improve the product yield of the top cover body.

[0013] Optionally, the surface of the positive electrode post is provided with a first rounded corner in the circumferential direction, and the surface of the negative electrode post is provided with a second rounded corner in the circumferential direction.

[0014] By adopting the above technical solution, the first and second clearance rounded corners can protect the top patch during the top patch pasting process, preventing damage to the top patch caused by the edges of the positive and negative terminals, protecting the structural integrity of the top patch, and thus improving the product yield of the top cover body.

[0015] Optionally, the surface of the positioning ear is provided with a third clearance fillet along the circumferential direction.

[0016] By adopting the above technical solution, the third rounded corner can protect the top patch during the pasting process, preventing damage to the top patch caused by the edge of the positioning ear, protecting the structural integrity of the top patch, and thus improving the product yield of the top cover body.

[0017] Optionally, the bottom wall of the top cover body is provided with a support block, and the bottom wall of the support block is provided with anti-slip texture.

[0018] By adopting the above technical solution, the support block and anti-slip texture can improve the stability of the top cover body when the top patch is pasted, reduce the probability of the top cover body sliding when the top patch is pasted, and thus improve the product yield.

[0019] Optionally, the bottom wall of the top cover body is provided with several reinforcing rods.

[0020] By adopting the above technical solution, the reinforcement rod can effectively improve the structural strength of the top cover body, so as to prevent the top cover body from breaking under pressure when the top patch is pasted, thus effectively improving the structural safety and quality of the product.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. By opening positioning holes and setting positioning ears, the top patch can be attached using the positioning holes and positioning ears as positioning points. This not only protects the appearance of the product, but also makes the attachment of the top patch more accurate, thus improving the yield of the automated production line.

[0023] 2. The first, second, and third rounded corners can protect the top patch during the application process, preventing damage to the top patch caused by the edges of the positive and negative terminals and the positioning ears. This protects the structural integrity of the top patch and improves the product yield of the top cover. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a top cover injection molding structure that facilitates the positioning of the top patch in an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the bottom structure of the top cover body in an embodiment of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Top cover body; 2. Positive terminal post; 3. Negative terminal post; 4. Explosion-proof valve; 5. Positioning hole; 6. Positioning ear; 7. Positioning groove; 8. Identification groove; 9. Identification protrusion; 10. First clearance rounded corner; 11. Second clearance rounded corner; 12. Third clearance rounded corner; 13. Support block; 14. Anti-slip texture; 15. Reinforcing rod. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0028] This application discloses a top cover injection molding structure that facilitates the positioning of the top patch. (Refer to...) Figure 1The system includes a top cover body 1. Two positioning grooves 7 are formed on the surface of the top cover body 1, symmetrically arranged about the central axis of the top cover body 1. A positive electrode post 2 is located in one positioning groove 7, and a negative electrode post 3 is located in the other. Both the positive and negative electrode posts 2 and 3 are detachably connected to the positioning grooves 7, thereby improving the flexibility and applicability of the top cover body 1. An explosion-proof valve 4 is provided on the surface of the top cover body 1, located between the positive and negative electrode posts 2 and 3. The two positioning grooves 7 are symmetrically arranged about the central axis of the top cover body 1. On the opposite sides, there are identification grooves 8. One identification groove 8 represents the installation position of the positive terminal 2 and is shaped like a "+". The other identification groove 8 represents the installation position of the negative terminal 3 and is shaped like a "-". In addition, the surfaces of the positive terminal 2 and the negative terminal 3 are integrally formed with identification protrusions 9 to correspond to the identification grooves 8 and improve the accuracy of the terminal installation. The identification protrusions 9 on the surface of the positive terminal 2 are shaped like a "+", and the identification protrusions 9 on the surface of the negative terminal 3 are shaped like a "-".

[0029] Reference Figure 1 Both the positive electrode post 2 and the negative electrode post 3 are cylindrical with their tops protruding from the surface of the top cover body 1. Positioning holes 5 are provided at the center of the surfaces of both the positive electrode post 2 and the negative electrode post 3. Positioning ears 6 are welded to the periphery of both the positive electrode post 2 and the negative electrode post 3. Thus, when the top patch is pasted, the positioning holes 5 and the positioning ears 6 can be used as positioning points to improve the pasting accuracy of the top patch and protect the aesthetic appearance of the top cover body 1.

[0030] Reference Figure 1 The surface of the positive electrode post 2 has a first rounded corner 10 along the circumferential direction, the surface of the negative electrode post 3 has a second rounded corner 11 along the circumferential direction, and the surface of the positioning ear 6 has a third rounded corner 12 along the circumferential direction. Thus, when the top patch is pasted, the rounded first rounded corner, second rounded corner, and third rounded corner can ensure that the top patch will not be pierced by the edge when the edge of the top patch opening passes through the positive electrode post 2, the negative electrode post 3, and the positioning ear 6, thus protecting the structural integrity of the top patch and improving the product yield of the top cover body 1.

[0031] Reference Figure 1 and Figure 2 The bottom wall of the top cover body 1 is integrally formed with two support blocks 13, which are symmetrically arranged about the central axis of the top cover body 1. The bottom wall of the top cover body 1 is integrally formed with anti-slip texture 14 to improve the stability of the top cover body 1 when the top patch is attached, reduce the probability of the top cover body 1 sliding, and thus improve the product yield of the top cover body 1. The bottom wall of the top cover body 1 is provided with several reinforcing rods 15, which are staggered to improve the structural strength of the top cover body 1 and reduce the probability of the top cover body 1 being bent when the top patch is attached, thereby protecting the product structure.

[0032] The implementation principle of the top cover injection molding structure of this application embodiment, which facilitates the positioning of the top patch, is as follows: the worker assembles the positive electrode post 2 and the negative electrode post 3 with the top cover body 1 by identifying the groove 8 and the protrusion 9. The top cover body 1 is placed on the automated production line. When it reaches the top patch pasting process position, the top patch is pasted on the top cover body 1. Using the positioning hole 5 and the positioning ear 6 as positioning points, the top patch is passed through the positive electrode post 2, the negative electrode post 3 and the positioning ear 6 to attach the top patch. This can protect the appearance of the product and make the attachment of the top patch more accurate, thereby improving the yield of the automated production line.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A top cover injection molding structure that facilitates top patch positioning, comprising a top cover body (1), wherein a positive electrode post (2) and a negative electrode post (3) are disposed on the surface of the top cover body (1), and an explosion-proof valve (4) is disposed between the positive electrode post (2) and the negative electrode post (3), characterized in that: Positioning holes (5) are provided at the center of both the positive electrode post (2) and the negative electrode post (3), and positioning ears (6) are provided on the peripheral walls of both the positive electrode post (2) and the negative electrode post (3), and the positioning ears (6) abut against the surface of the top cover body (1).

2. The top cover injection molding structure for easier top patch positioning according to claim 1, characterized in that: The top cover body (1) has a positioning groove (7) for installing the positive electrode post (2) and the negative electrode post (3).

3. The top cover injection molding structure for easier top patch positioning according to claim 2, characterized in that: The positioning groove (7) has an identification groove (8) on one side to distinguish the installation positions of the positive terminal (2) and the negative terminal (3).

4. The top cover injection molding structure for easier positioning of the top patch according to claim 1, characterized in that: Both the positive electrode post (2) and the negative electrode post (3) have identification protrusions (9) on their surfaces.

5. The top cover injection molding structure for easier top patch positioning according to claim 1, characterized in that: The surface of the positive electrode post (2) is provided with a first rounded corner (10) in the circumferential direction, and the surface of the negative electrode post (3) is provided with a second rounded corner (11) in the circumferential direction.

6. The top cover injection molding structure for easier top patch positioning according to claim 1, characterized in that: The positioning ear (6) has a third clearance rounded corner (12) along the circumferential direction.

7. The top cover injection molding structure for easier top patch positioning according to claim 1, characterized in that: The bottom wall of the top cover body (1) is provided with a support block (13), and the bottom wall of the support block (13) is provided with anti-slip texture (14).

8. A top cover injection molding structure for easier positioning of the top patch according to claim 1, characterized in that: The bottom wall of the top cover body (1) is provided with several reinforcing rods (15).

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