Lithium battery tab with fixing piece

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a lithium battery tab with a fixing piece, which comprises a tab main body and the fixing piece, one end of the tab main body is provided with a connecting part matched with a battery cell current collector, the fixing piece is arranged at the other end of the tab main body, the fixing piece comprises an elastic base and a plurality of anti-skidding bulges, and the elastic base is provided with a plurality of anti-skidding bulges. A cavity is formed in the elastic base, the cavity is filled with an elastic material, the anti-skid bulges are uniformly distributed on the outer surface of the elastic base, the tab main body and the elastic base are connected through a buckle structure, and the buckle structure comprises a clamping groove formed in the tab main body and a clamping hook arranged on the elastic base. According to the lithium battery tab with the fixing piece, the connection stability is improved, the service life of the battery is prolonged, the production cost is reduced, the vibration resistance is enhanced, and the safety and the reliability of the battery are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a lithium battery pole ear with a fixing piece. Background Art

[0002] Lithium batteries, as important energy storage devices, are widely used in electronic devices, electric vehicles, energy storage systems, and other fields. One of the core components of a lithium battery is the battery cell, and key components within the cell are the positive and negative electrode tabs. Tabs are conductors that connect the active material within the battery cell to the external circuit, and their performance directly impacts the battery's charge and discharge efficiency, cycle life, and safety. Therefore, well-designed and high-performance tabs are crucial to improving the overall performance of lithium batteries.

[0003] Although the existing lithium battery tab design has been widely used in various battery products, it still has some structural deficiencies. First, the connection between the tab and the battery cell mainly relies on welding, which can easily lead to fatigue damage of the welding point after the battery has undergone multiple charge and discharge cycles, thereby causing the contact resistance to increase or even disconnect, affecting battery performance. Secondly, the welding positioning of the tab during the battery assembly process requires high operating precision, which is not only time-consuming but also increases production costs. In addition, in applications such as electric vehicles, battery packs are often faced with varying degrees of vibration and impact. Traditional tab structures are difficult to effectively resist these external forces, which may cause the tab to loosen or fall off, reducing the safety and reliability of the battery. Utility Model Content

[0004] The purpose of the present invention is to provide a lithium battery tab with a fixing member to solve the problems of poor connection stability, great assembly difficulty and weak vibration resistance in the current lithium battery tab design proposed in the above background art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lithium battery tab with a fixing part, comprising a tab body and a fixing part, wherein one end of the tab body is provided with a connection part matching the battery cell current collector, and the fixing part is provided at the other end of the tab body, and the fixing part comprises an elastic base and a plurality of anti-slip protrusions, a cavity is provided inside the elastic base, and the cavity is filled with elastic material, and the anti-slip protrusions are evenly distributed on the outer surface of the elastic base, and the tab body and the elastic base are connected by a snap-fit ​​structure, and the snap-fit ​​structure comprises a slot provided on the tab body and a hook provided on the elastic base.

[0006] Preferably, the connecting portion is a flat metal sheet, the width of the connecting portion matches the width of the battery core current collector, and the thickness of the connecting portion is 0.1 mm to 0.3 mm.

[0007] Preferably, the elastic base is a long strip structure made of silicone rubber, and the elastic material is a foamed polyurethane material and matches the shape of the cavity.

[0008] Preferably, the height of the anti-slip protrusions is 0.5 mm to 1.0 mm, and the spacing between the anti-slip protrusions is 1.0 mm to 2.0 mm.

[0009] Preferably, the shape of the slot is a rectangular structure, and the shape of the hook is a barb shape, and the size of the hook matches the slot.

[0010] Preferably, the thickness of the tab body is 0.1 mm to 0.2 mm, and the edge of the tab body is provided with reinforcing ribs distributed along the length direction.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the lithium battery tab with a fixing member improves connection stability, extends battery life, reduces production costs, enhances vibration resistance, and greatly improves battery safety and reliability. The lithium battery tab with a fixing member is provided with a fixing member composed of an elastic base and multiple anti-slip protrusions at one end. The elastic base can be quickly assembled and disassembled with the tab body through the design of a slot and a hook. The cavity inside the elastic base and the elastic material filled can effectively absorb and buffer external vibrations, reduce stress concentration, and the anti-slip protrusions increase the friction between the contact surface of the tab and the battery cell, further enhancing the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of a lithium battery tab with a fixing part according to the present invention;

[0013] Figure 2 This is a side structural diagram of a lithium battery tab with a fixing member according to the present invention;

[0014] Figure 3 The utility model is a schematic diagram of the connection structure between the fixing piece and the tab body of a lithium battery tab with a fixing piece.

[0015] In the figure: 1. Tab body; 11. Connecting part; 12. Reinforcing rib; 2. Fixing piece; 21. Elastic base; 211. Cavity; 212. Elastic material; 22. Anti-slip protrusion; 3. Snap structure; 31. Slot; 32. Hook. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1-3The utility model provides a technical solution: a lithium battery tab with a fixing part, comprising a tab body 1 and a fixing part 2, wherein one end of the tab body 1 is provided with a connecting portion 11 matching the battery core current collector, and the fixing part 2 is provided at the other end of the tab body 1, and the fixing part 2 comprises an elastic base 21 and a plurality of anti-slip protrusions 22, a cavity 211 is provided inside the elastic base 21, and the cavity 211 is filled with an elastic material 212, and the anti-slip protrusions 22 are evenly distributed on the outer surface of the elastic base 21, and the tab body 1 and the elastic base 21 are connected by a snap-fit ​​structure 3, and the snap-fit ​​structure 3 comprises a card slot 31 provided on the tab body 1 and a card hook 32 provided on the elastic base 21, and this structure is connected by a snap-fit ​​structure 3. The cooperation between the groove 31 and the hook 32 realizes the rapid installation and disassembly of the tab body 1 and the elastic base 21. At the same time, the cavity 211 inside the elastic base 21 and the elastic material 212 filled therein can absorb and buffer external vibrations, reducing the stress concentration at the connection between the tab and the battery cell. The anti-slip protrusions 22 are evenly distributed on the outer surface of the elastic base 21, increasing the friction between the tab and the battery cell contact surface, further enhancing the stability of the connection. Therefore, through the joint action of the fixing member 2 structure, the overall stability and vibration resistance of the tab body 1 are significantly improved, effectively solving the problem of poor connection stability between the tab body 1 and the battery cell in the prior art, which is easily loosened or falls off due to vibration. The connection part 11 The connecting portion 11 is a flat metal sheet, and the width of the connecting portion 11 matches the width of the battery current collector, and the thickness of the connecting portion 11 is 0.1mm to 0.3mm. The connecting portion 11 of this structure can fit tightly with the battery current collector through the design of the flat metal sheet, ensuring good electrical contact performance and mechanical connection strength. At the same time, the flat design reduces the thickness of the connecting portion 11, reduces the overall volume and weight of the pole ear, and is conducive to improving the space utilization and lightweight design of the battery. The thickness range of the connecting portion 11 ensures sufficient mechanical strength and avoids material waste and cost increase caused by excessive thickness. The elastic base 21 is a long strip structure made of silicone rubber, and the elastic material 212 is foamed. The elastic base 21 is made of polyurethane and conforms to the shape of the cavity 211. This structure provides good flexibility and resilience, can effectively absorb and buffer external vibrations, and reduce stress concentration at the connection between the tab and the battery cell. The elastic material 212 made of foamed polyurethane fills the cavity 211, further enhancing the buffering performance of the elastic base 21 and ensuring the stability and reliability of the tab in high vibration and high mechanical stress environments. At the same time, the elongated structural design enables the elastic base 21 to better fit the tab body 1, improving the compactness and consistency of the overall structure. The height of the anti-slip protrusions 22 is 0.5mm to 1.0mm, and the spacing between the anti-slip protrusions 22 is 1.0mm to 2.0mm, the anti-slip protrusions 22 of this structure increase the friction between the contact surface of the pole ear and the battery core, effectively preventing the pole ear from sliding or falling off under vibration or external force, and improving the stability of the connection. At the same time, the uniform distribution of the anti-slip protrusions 22 on the surface of the elastic base 21 ensures a good anti-slip effect and avoids material waste caused by too small a spacing and insufficient anti-slip performance caused by too large a spacing, thereby maintaining reliable connection performance in a variety of application environments. The shape of the card slot 31 is a rectangular structure, and the shape of the card hook 32 is a barb shape, and the size of the card hook 32 matches the card slot 31. There are two card slots 31 and two card hooks 32. The rectangular structure of the card slot 31 provides a stable positioning function to ensure the accuracy of the connection, while the barb-shaped card hook 32 can firmly It fits into the slot 31 to prevent loosening or falling out due to vibration or external forces. The precise matching of the hook 32's dimensions with the slot 31 ensures a tight and stable connection, simplifies the assembly process, and improves production efficiency. The tab body 1 is made of aluminum, with a thickness of 0.1mm to 0.2mm. Reinforcing ribs 12 are provided along the edge of the tab body 1 along its length. This structure ensures excellent electrical conductivity and light weight thanks to the aluminum material. The thickness of the tab body 1 ensures sufficient mechanical strength, reduces material usage, and reduces cost and weight. The reinforcing ribs 12 further enhance the rigidity of the tab body 1, improving its resistance to bending and vibration, and effectively preventing deformation or damage due to external forces during use.

[0018] Working principle: When using the lithium battery tab with a fixing part, first align the connecting part 11 at one end of the tab body 1 with the battery cell current collector, ensure that the width of the connecting part 11 matches the width of the battery cell current collector, then fit the connecting part 11 tightly on the battery cell current collector and firmly connect it by welding, then align the elastic base 21 of the fixing part 2 with the other end of the tab body 1, align the hook 32 on the elastic base 21 with the slot 31 on the tab body 1, gently press the elastic base 21 so that the hook 32 is firmly embedded in the slot 31, and complete the fixing part 2 and the tab. The connection of the main body 1, at this time, the cavity 211 inside the elastic base 21 and the filled elastic material 212 can absorb and buffer external vibrations, reduce the stress concentration at the connection between the pole ear main body 1 and the battery cell, and the anti-slip protrusions 22 on the outer surface of the elastic base 21 are evenly distributed, which increases the friction between the contact surface of the pole ear and the battery cell, further enhancing the stability of the connection. At the same time, the reinforcing ribs 12 enhance the rigidity of the pole ear main body 1 and improve its ability to resist bending and vibration. The entire installation process is simple and quick, without the need for complicated operations, greatly improving production efficiency, thereby completing a series of tasks.

[0019] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lithium battery tab with a fixing member, comprising a tab body (1) and a fixing member (2), characterized in that: One end of the tab body (1) is provided with a connection portion (11) that matches the battery core current collector, and the fixing member (2) is provided at the other end of the tab body (1). The fixing member (2) includes an elastic base (21) and a plurality of anti-slip protrusions (22). A cavity (211) is provided inside the elastic base (211), and the cavity (211) is filled with elastic material (212). The anti-slip protrusions (22) are evenly distributed on the outer surface of the elastic base (21). The tab body (1) and the elastic base (21) are connected via a snap-fit ​​structure (3), and the snap-fit ​​structure (3) includes a slot (31) provided on the tab body (1) and a hook (32) provided on the elastic base (21).

2. The lithium battery tab with a fixing member according to claim 1, characterized in that: The connecting portion (11) is a flat metal sheet, the width of the connecting portion (11) matches the width of the battery core current collector, and the thickness of the connecting portion (11) is 0.1 mm to 0.3 mm.

3. The lithium battery tab with a fixing member according to claim 1, characterized in that: The elastic base (21) is a long strip structure made of silicone rubber, and the elastic material (212) is made of foamed polyurethane and matches the shape of the cavity (211).

4. The lithium battery tab with a fixing member according to claim 1, characterized in that: The height of the anti-slip protrusions (22) is 0.5 mm to 1.0 mm, and the spacing between the anti-slip protrusions (22) is 1.0 mm to 2.0 mm.

5. The lithium battery tab with a fixing member according to claim 1, characterized in that: The shape of the card slot (31) is a rectangular structure, and the shape of the card hook (32) is a barb shape, and the size of the card hook (32) matches that of the card slot (31).

6. The lithium battery tab with a fixing member according to claim 1, characterized in that: The thickness of the tab body (1) is 0.1 mm to 0.2 mm, and the edge of the tab body (1) is provided with reinforcing ribs (12) distributed along the length direction.

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