Novel high-performance power battery tab

Abstract

The utility model provides a novel high-performance power battery tab which comprises a tab body and an insulating structure, the insulating structure comprises an insulating rubber tape, and the insulating rubber tape is fixed on the tab body through stamping, so that the tab body is clamped by the insulating rubber tape; a first extension end and a second extension end are respectively formed on two sides of the insulated rubber tape, inclined openings are formed on two sides of the middle part of the insulated rubber tape, the inclined side edges of the inclined openings form adhesive edges, and the adhesive edges and the surface of the tab body are matched with an adhesive overflow area. According to the utility model, better sealing performance is realized, electrolyte permeation is prevented, and the adhesive strength and the shock resistance are improved, so that the safety of the battery is improved, and the service life of the battery is prolonged.

Description

Technical Field

[0001] This utility model relates to a novel high-performance power battery tab. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage technologies, the performance and reliability requirements of power batteries, as core components, are increasing. The tabs, as key components connecting the positive and negative terminals of the battery to external circuits, directly affect the safety and lifespan of the battery due to their fixing method and sealing performance.

[0003] Traditional power battery tabs are usually fixed by directly attaching them with tape, but this method has the following problems:

[0004] The adhesive edges are prone to falling off: The adhesive edges of traditional tapes are mostly vertical structures. Under the action of immersion in electrolyte, temperature changes or mechanical vibration, the adhesive interface is easily impacted, causing the edges to lift or fall off, affecting the sealing performance and electrical connection stability.

[0005] Insufficient adhesive strength: The contact area between the tape on the vertical edge and the tab is limited, resulting in weak adhesion. After long-term use, the tape may peel off, leading to problems such as electrolyte leakage or loosening of the tab.

[0006] To address the aforementioned issues, a novel electrode fixing technology is urgently needed. By optimizing the tape structure and fixing method, the adhesive strength and impact resistance can be improved, thereby enhancing the long-term stability and safety of the battery. Utility Model Content

[0007] This invention provides a novel high-performance power battery tab that can effectively solve the above-mentioned problems.

[0008] This utility model is implemented as follows:

[0009] A novel high-performance power battery tab includes a tab body and an insulation structure.

[0010] The insulation structure includes insulating tape, which is fixed to the electrode body by stamping, so that the insulating tape clamps the electrode body;

[0011] The insulating tape has a first extension end and a second extension end on both sides, and the middle part of the insulating tape has inclined openings on both sides. The inclined side of the inclined opening forms an adhesive edge, which matches the adhesive overflow area on the surface of the tab body. The overflow area forms a gradual transition interface with the surface of the tab body.

[0012] The beneficial effects of this utility model are:

[0013] (1) This utility model adopts a stamped and fixed insulating tape structure, forming a first extension end and a second extension end with an inclined opening design on both sides of the tab body. The adhesive edge formed by the inclined opening precisely matches the surface of the tab body to form an adhesive overflow area. This unique structural design can achieve multiple beneficial effects: First, the stamped and fixed clamping method ensures that the insulating tape and the tab body are tightly attached, improving structural stability; Second, the gradual transition interface formed by the adhesive edge with the inclined opening and the tab body can effectively increase the adhesive contact area and significantly enhance the bonding strength; Third, the adhesive overflow area can reasonably accommodate the overflowed adhesive, avoiding stress concentration problems caused by uneven adhesive layer thickness; At the same time, this structure can also achieve better sealing performance, prevent electrolyte penetration, thereby improving battery safety and service life; In addition, the overall structural design takes into account the simplicity of the manufacturing process and the reliability of use, which is convenient for mass production and can meet the high performance requirements of power batteries for tab components. Attached Figure Description

[0014] 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 of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is the front view of this utility model.

[0016] Figure 2 This is a schematic diagram of the insulation structure of this utility model.

[0017] Figure 3 This is a cross-sectional view of the electrode body and insulation structure of this utility model.

[0018] Explanation of icon numbers:

[0019] 10. Ji Er body;

[0020] 20. Insulating structure; 200. Insulating tape; 202. First extension end; 2022. Arc-shaped portion; 204. Second extension end; 206. Inclined opening;

[0021] 30. Oblique cut. Detailed Implementation

[0022] 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 only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0023] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] Reference Figure 1-3 As shown, a novel high-performance power battery tab includes a tab body 10 and an insulating structure 20. The tab body 10 has oblique cuts 30 on its left and right sides. The oblique cuts 30 cooperate with the inclined openings 206 of the insulating tape 200 to enhance the adhesive strength and peel resistance.

[0025] The insulation structure 20 includes an insulating tape 200, which is fixed to the tab body 10 by stamping, so that the insulating tape 200 clamps the tab body 10.

[0026] The insulating tape 200 has a first extension end 202 and a second extension end 204 on both sides. The middle part of the insulating tape 200 has inclined openings 206 on both sides. The inclined side of the inclined opening 206 forms an adhesive edge. This edge matches the adhesive overflow area on the surface of the tab body 10. The overflow area forms a gradual transition interface with the surface of the tab body 10.

[0027] The first extension end 202 includes an arc-shaped portion 2022, which is connected to the oblique cut 30. The radius of curvature of the arc-shaped portion 2022 is matched with the thickness of the tab body 10 to improve the fit between the insulating tape 200 and the tab body 10.

[0028] Specifically, the first extension end 202 and the second extension end 204 are also inclined (not shown in the figure) to reduce the impact of electrolyte and other substances and prevent edge detachment.

[0029] The tilt angle of the inclined port 206 is 30° to 60° to optimize the adhesive contact area and resistance to electrolyte impact. The tilt angle of 30° to 60° allows the adhesive to extend along the inclined surface under pressure, forming a gradual transition interface, increasing the effective bonding area, improving the overall bonding strength, and ensuring a tight seal between the adhesive edge and the contact surface of the tab body 10, reducing the risk of electrolyte penetration. At the same time, the inclined structure can disperse the impact force of electrolyte flow and prevent the adhesive layer from peeling off.

[0030] Furthermore, the inclined opening 206 also cooperates with the oblique cut 30 on the tab body to form a mechanical interlocking effect, further preventing the adhesive layer from cracking or warping. Moreover, the adhesive overflow area design of the inclined opening 206 can accommodate a small amount of overflow, avoiding local stress problems caused by adhesive accumulation or uneven thickness.

[0031] Insulating tape 200 is made of a polymer material that is resistant to electrolyte corrosion to enhance long-term stability; the polymer material is polyimide, modified polypropylene, or fluorinated ethylene propylene copolymer.

[0032] The insulating tape 200 has a thickness of 0.05–0.2 mm and a micron-level textured surface to increase the adhesive contact area. Specifically, this thickness design ensures both the flexibility of the insulating tape 200, allowing it to adhere tightly to the tab body 10 during stamping, and sufficient mechanical strength to prevent damage due to excessive thinness or impact on the utilization of internal battery space due to excessive thickness. The micron-level texture allows the adhesive to penetrate and anchor better to the tape surface, forming a stronger mechanical bond and reducing the risk of adhesive peeling. At the same time, the textured structure can disperse the stress generated during adhesive curing or thermal expansion, preventing cracking or warping caused by localized stress concentration.

[0033] A conductive adhesive layer is also provided between the insulating tape 200 and the tab body 10 to improve the stability of the electrical connection.

[0034] Working principle: An insulating tape 200 made of a polymer material resistant to electrolyte corrosion is fixed to the tab body 10 through a stamping process to form a clamping structure. The thickness of the insulating tape 200 and the micron-level textured surface design ensure both flexibility and mechanical strength, while also enhancing bonding reliability by increasing the adhesive contact area and stress dispersion. The inclined opening 206 cooperates with the oblique cut 30 on the tab body 10 to form a mechanical interlocking effect and an adhesive overflow area, allowing the adhesive to extend along the inclined surface to form a gradual transition interface. This increases the effective bonding area and bonding strength, while also achieving a tight seal to resist electrolyte penetration and impact. At the same time, the arc-shaped portion 2022 of the first extension end 202 ensures a tight fit with its radius of curvature matching the thickness of the tab body. The conductive adhesive layer between the insulating tape 200 and the tab body 10 further optimizes the electrical connection stability, ultimately achieving a comprehensive performance of high bonding strength, excellent peel resistance, long-term resistance to electrolyte corrosion, and stable electrical connection.

[0035] 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, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel high-performance power battery tab, comprising a tab body (10) and an insulating structure (20), characterized in that: The insulation structure (20) includes an insulating tape (200), which is fixed to the tab body (10) by stamping, so that the insulating tape (200) clamps the tab body (10); The insulating tape (200) has a first extension end (202) and a second extension end (204) on both sides respectively. The insulating tape (200) has inclined openings (206) on both sides of the middle part. The inclined side of the inclined opening (206) forms an adhesive edge. The edge matches the adhesive overflow area on the surface of the tab body (10). The overflow area forms a gradual transition interface with the surface of the tab body (10).

2. The novel high-performance power battery tab according to claim 1, characterized in that, The tilt angle of the tilted opening (206) is 30° to 60° to optimize the adhesive contact area and the resistance to electrolyte impact.

3. The novel high-performance power battery tab according to claim 1, characterized in that, A conductive adhesive layer is also provided between the insulating tape (200) and the tab body (10) to improve the stability of the electrical connection.

4. The novel high-performance power battery tab according to claim 1, characterized in that, The insulating tape (200) is made of a polymer material that is resistant to electrolyte corrosion in order to enhance long-term stability.

5. A novel high-performance power battery tab according to claim 4, characterized in that, The polymer material is polyimide, modified polypropylene, or fluorinated ethylene propylene copolymer.

6. A novel high-performance power battery tab according to claim 1, characterized in that, The insulating tape (200) has a thickness of 0.05 to 0.2 mm and a surface with micron-level textured surface to increase the adhesive contact area.

7. A novel high-performance power battery tab according to claim 1, characterized in that, The tab body (10) has oblique cuts (30) on its left and right sides. The oblique cuts (30) cooperate with the inclined opening (206) of the insulating tape (200) to enhance the adhesive strength and peel resistance.

8. A novel high-performance power battery tab according to claim 7, characterized in that, The first extension end (202) includes an arc-shaped portion (2022) which connects to the oblique cut (30).

9. A novel high-performance power battery tab according to claim 8, characterized in that, The radius of curvature of the arc-shaped portion (2022) is matched with the thickness of the tab body (10) to improve the fit between the insulating tape (200) and the tab body (10).

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