Positive electrode stable resistor structure top cover

Abstract

The utility model discloses a top cover with a positive electrode stable resistor structure, which relates to the technical field of lithium batteries and is characterized in that an insulating PPS (polyphenylene sulfite) rubber coating is arranged between a positive electrode post of the top cover and a light aluminum sheet, and the positive electrode post is electrically connected with the light aluminum sheet through a resistor element. According to the top cover, through the innovative design that an insulating PPS rubber-coated fixing structure is matched with an independent resistor element, the influence of aging of a traditional conductive PPS material and fluctuation of an injection molding process on the resistance stability is thoroughly eliminated, it is ensured that the resistance value between a positive pole column of the lithium battery and an optical aluminum sheet is kept stable in the whole life cycle, and the voltage consistency of a battery cell is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and more specifically, to a positive electrode stabilizing resistor structure top cover. Background Technology

[0002] Currently, the positive terminal of lithium battery top cover and the aluminum sheet are connected using conductive PPS to form a circuit and reduce electro-corrosion. However, the resistance of conductive PPS itself fluctuates and changes over time. As the plastic ages, the resistance changes over time, and the fluctuation is even greater due to factors such as temperature and product structure during injection molding. This poor resistance stability leads to unstable voltage differences in the battery cell, affecting the overall electrical performance of the cell. Utility Model Content

[0003] The present invention provides a top cover for a positive electrode stabilizing resistor structure, which can solve the above-mentioned problems.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] A top cover for a positive electrode stabilizing resistor structure, wherein the positive electrode post and the aluminum sheet are connected by PPS coating, wherein the PPS coating is an insulating adhesive, and the positive electrode post and the aluminum sheet are electrically connected through a resistive element.

[0006] Optionally, the resistive element is located on the side of the aluminum sheet facing away from the battery cell.

[0007] Optionally, the resistive element is located on the side of the aluminum sheet facing the battery cell.

[0008] Optionally, the resistive element may be one or more.

[0009] Optionally, the resistive element can be detachably connected to the positive terminal and the aluminum sheet for replacement, maintenance, and upgrades.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] By adopting an innovative design that combines an insulating PPS coating structure with an independent resistor element, the influence of aging of traditional conductive PPS materials and fluctuations in injection molding processes on resistance stability is completely eliminated. This ensures that the resistance value between the positive electrode post and the aluminum sheet of the lithium battery remains stable throughout its entire life cycle, significantly improving the consistency of cell voltage.

[0012] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, embodiments of this utility model are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of Example 1;

[0015] Figure 2 This is a structural schematic diagram of Example 2;

[0016] In the diagram: 100, positive terminal; 200, PPS coated; 300, plain aluminum sheet; 400, resistive element. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0018] Example 1

[0019] Please refer to Figure 1 This embodiment provides a top cover for a positive electrode stable resistor structure, including a positive electrode post 100, an aluminum sheet 300, a PPS coated sheet 200, and a resistor element 400.

[0020] Specifically, the corresponding resistor element 400 was selected according to the design value, and one resistor element 400 was used.

[0021] Processing technology: Insulating PPS material is injection molded between the positive electrode post 100 and the aluminum sheet 300 to form a PPS overlay layer of 200, which fixes the positive electrode post 100. Then, a selected resistor element 400 is welded between the aluminum sheet 300 and the positive electrode post 100. The resistor element 400 is on the side of the aluminum sheet 300 facing away from the battery cell and is conductive to the aluminum sheet 300 and the positive electrode post 100. The resistance value of the resistor element 400 determines the resistance value between the positive electrode post and the aluminum sheet 300.

[0022] Example 2

[0023] Unlike Example 1, the resistive element 400 is located on the side of the aluminum sheet 300 facing the battery cell, see... Figure 2 As shown.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A top cover for a positive electrode stabilizing resistor structure, wherein the positive electrode post (100) and the aluminum sheet (300) are connected by PPS coating (200), characterized in that, The PPS coating (200) is an insulating adhesive, and the positive electrode post (100) and the aluminum sheet (300) are electrically connected through a resistive element (400).

2. The top cover of the positive electrode stabilizing resistor structure according to claim 1, characterized in that, The resistive element (400) is located on the side of the aluminum sheet (300) facing away from the battery cell.

3. The top cover of the positive electrode stabilizing resistor structure according to claim 1, characterized in that, The resistive element (400) is located on the side of the aluminum sheet (300) facing the battery cell.

4. The top cover of the positive electrode stabilizing resistor structure according to claim 1, characterized in that, The resistive element (400) may be one or more.

5. The top cover of the positive electrode stabilizing resistor structure according to claim 1, characterized in that, The resistive element (400) is detachably connected to the positive terminal (100) and the aluminum sheet (300).

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