Lithium battery round tab

Abstract

The utility model discloses a kind of lithium battery round tab, belong to battery tab technical field.The utility model's round tab is externally provided with protective layer, the top of battery body is provided with connecting shell, the outside of battery body is connected with protective shell by shaft pin, it is clamped connection between connecting shell and protective shell, the aluminum shell body structure of protective layer, can play mechanical protection effect to round tab, prevent it from being damaged by extrusion or collision by external force, can also effectively insulate the influence of external environment to round tab, avoid its oxidation or corrosion, to prolong the service life of battery, the contact area of the design of grid area welding spot protective shell whole is convex character structure, increase the coverage area of protective shell, can better protect round tab, reduce the direct impact of external object, connecting shell and protective shell are fixed by the clamping structure of insertion post and insertion hole, fixed and release protective shell can be easily carried out through hole ramp and into hole ramp, convenient and fast operation.

Description

Technical Field

[0001] This utility model relates to the field of battery tab technology, specifically a circular tab for lithium batteries. Background Technology

[0002] In the structure of lithium batteries, the round tabs are key components connecting the internal electrodes to the external circuitry. However, in current technology, the design and application of lithium battery round tabs still face several unresolved issues. Firstly, the round tabs are typically exposed to the outside of the battery, making them susceptible to mechanical stress, impacts, and the effects of humidity and corrosive gases from the external environment. This can lead to damage, oxidation, or corrosion of the round tabs, affecting the normal operation of the battery and shortening its lifespan. Secondly, the connection points between the round tabs and the battery body have a small contact area, resulting in insufficient conductivity and mechanical strength. This increases the resistance at the solder joints, causing severe overheating during charging and discharging, which not only reduces the battery's energy conversion efficiency but may also pose safety hazards. Furthermore, the connection methods between the protective structure of the round tabs and the battery body in existing lithium batteries are often complex and inconvenient to operate. The stability and reliability of the connection need improvement. When the battery is subjected to vibration or impact, the protective structure is prone to loosening or even detachment, failing to provide effective protection for the round tabs. Utility Model Content

[0003] The purpose of this invention is to provide a circular tab for lithium batteries, which can solve the problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery circular tab, comprising a circular tab and a battery body, wherein a welding part is provided at the bottom end of the circular tab, an empty foil area is provided inside the battery body, the circular tab is connected to the empty foil area through the welding part, a protective layer is provided on the outside of the circular tab, a connecting shell is provided on the top of the battery body, and a protective shell is connected to the outside of the battery body through a shaft pin, wherein the connecting shell and the protective shell are snap-fit ​​connected.

[0005] Preferably, the top of the circular tab is set as an exposed part, a pre-welding area is provided on the exposed part, a grid area is provided on the pre-welding area, a protective layer is provided on the outside of the exposed part, and the welding point between the circular tab and the protective layer passes through the grid area.

[0006] Preferably, the protective layer is an aluminum outer shell structure.

[0007] Preferably, an insulating layer is provided in the area where the connecting shell contacts the circular tab, and the thickness of the insulating layer is 0.05-0.1mm.

[0008] Preferably, a groove is provided on the side of the connecting shell away from the circular tab, a sliding rod is provided in the groove, a spring is arranged around the sliding rod, a slider is slidably arranged on the sliding rod, one side of the slider abuts against the spring, and a post is provided on the other side of the slider. The post passes through the connecting shell and is snapped into the protective shell, and the end of the post that is snapped into the protective shell is rounded and chamfered.

[0009] Preferably, the protective shell has a convex shape, and the two sides of the bottom of the protective shell are connected to the two sides of the outside of the battery body by axle pins. Symmetrical insertion holes are opened on both sides of the protective shell, and the size and position of the insertion holes correspond to the insertion posts.

[0010] Preferably, the bottom end of the outlet ramp faces the insertion hole, and the top end of the inlet ramp faces the insertion hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] The protective layer of this utility model features an aluminum outer shell structure. Aluminum material has excellent conductivity and corrosion resistance, providing mechanical protection for the round tabs, preventing damage from external pressure or impact. It also effectively isolates the round tabs from the influence of the external environment, preventing oxidation or corrosion and thus extending battery life. The grid design increases the contact area of ​​the solder joints, improving their conductivity and mechanical strength, reducing resistance and heat generation, thereby optimizing the battery's electrical performance. The overall convex structure of the protective shell increases its coverage area, providing better protection for the round tabs and reducing direct impact from external objects. The connecting shell and the protective shell are fixed by a snap-fit ​​structure with pins and holes. The protective shell can be easily fixed and detached using the outgoing and incoming ramps, making operation convenient and quick. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the circular electrode lug structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the insert structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the protective shell structure of this utility model.

[0017] In the diagram: 1. Round tab; 2. Battery body; 3. Protective layer; 4. Connecting shell; 5. Protective shell; 6. Welding part; 7. Empty foil area; 8. Insulating layer; 9. Grid area; 10. Insert post; 11. Slide groove; 12. Slide rod; 13. Slider; 14. Spring; 15. Insertion hole; 16. Outlet ramp; 17. Inlet ramp. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 This utility model provides the following technical solutions:

[0020] A lithium battery circular tab includes a circular tab 1 and a battery body 2. The bottom end of the circular tab 1 is provided with a welding part 6. The battery body 2 has an empty foil area 7 inside. The circular tab 1 is connected to the empty foil area 7 through the welding part 6. The outer side of the circular tab 1 is provided with a protective layer 3. The protective layer 3 is an aluminum shell structure. The aluminum material has good conductivity and corrosion resistance, which can not only provide mechanical protection for the circular tab 1 to prevent it from being damaged by external pressure or collision, but also effectively isolate the circular tab 1 from the influence of the external environment, avoid oxidation or corrosion, and thus extend the service life of the battery. The top of the battery body 2 is provided with a connecting shell 4. The outer side of the battery body 2 is connected to a protective shell 5 through a shaft pin. The connecting shell 4 and the protective shell 5 are connected by a snap-fit ​​connection.

[0021] The top of the round tab 1 is designed as an exposed portion, with a pre-welding area on top. A grid area 9 is provided on the pre-welding area, and a protective layer 3 is provided on the outside of the exposed portion. The solder joint between the round tab 1 and the protective layer 3 passes through the grid area 9. The design of the grid area 9 increases the contact area of ​​the solder joint, improves its conductivity and mechanical strength, and reduces resistance and heat generation at the solder joint, thereby optimizing the battery's electrical performance. The protective layer 3 is an aluminum outer shell structure. An insulating layer 8 is provided at the contact area between the connecting shell 4 and the round tab 1. The insulating layer 8 has a thickness of 0.05-0.1mm and effectively prevents leakage between the connecting shell 4 and the round tab 1, ensuring the battery's electrical safety.

[0022] A groove 11 is provided on the side of the connecting shell 4 away from the circular tab 1. A slide rod 12 is provided in the groove 11. A spring 14 is arranged around the slide rod 12. A slider 13 is slidably arranged on the slide rod 12. One side of the slider 13 abuts against the spring 14. A post 10 is provided on the other side of the slider 13. The post 10 passes through the connecting shell 4 and is snapped onto the protective shell 5. The end of the post 10 that is snapped onto the protective shell 5 is rounded and chamfered.

[0023] The protective shell 5 has a convex shape, which increases the coverage area of ​​the protective shell 5 and can better protect the round tab 1, reducing the direct impact of external objects. The two sides of the bottom of the protective shell 5 are connected to the two sides of the battery body 2 through the shaft pin. Symmetrical insertion holes 15 are opened on both sides of the protective shell 5, and the size and position of the insertion holes 15 correspond to the insertion post 10. The two sides of the insertion hole 15 are respectively provided with an outlet ramp 16 and an inlet ramp 17. The bottom end of the outlet ramp 16 faces the insertion hole 15, and the top end of the inlet ramp 17 faces the insertion hole 15. The connecting shell 4 and the protective shell 5 are fixed by the snap-fit ​​structure between the plug 10 and the insertion hole 15. The rounded chamfer design of the snap-fit ​​end of the plug 10 can guide the plug 10 to smoothly enter the insertion hole 15 when inserted, reducing the snap-fit ​​resistance. At the same time, with the elastic force of the spring 14, the plug 10 can be tightly snapped into the insertion hole 15, preventing loosening between the connecting shell 4 and the protective shell 5, and enhancing the stability of the overall battery structure.

[0024] The widths of the exit ramp 16 and the inlet ramp 17 are greater than those of the insertion hole 15. When pushed along the inlet ramp 17, the round end of the insertion post 10 slides into the insertion hole 15 along the inlet ramp 17 for fixation. When it needs to be released, it can be pushed out by sliding along the exit ramp 16 in the opposite direction. The operation is convenient and quick, and the protective shell 5 can be easily fixed and released.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circular tab for a lithium battery, comprising a circular tab (1) and a battery body (2), characterized in that, The bottom end of the circular tab (1) is provided with a welding part (6), the battery body (2) is provided with an empty foil area (7), the circular tab (1) is connected to the empty foil area (7) through the welding part (6), the outside of the circular tab (1) is provided with a protective layer (3), the top of the battery body (2) is provided with a connecting shell (4), the outside of the battery body (2) is connected with a protective shell (5) through a shaft pin, and the connecting shell (4) and the protective shell (5) are connected by a snap-fit ​​connection.

2. The lithium battery circular tab according to claim 1, characterized in that, The top of the circular tab (1) is set as an exposed part, and a pre-welding area is provided on the exposed part. A grid area (9) is provided on the pre-welding area. A protective layer (3) is provided on the outside of the exposed part. The welding point of the circular tab (1) and the protective layer (3) passes through the grid area (9).

3. A lithium battery circular tab according to claim 1, characterized in that, The protective layer (3) is an aluminum outer shell structure.

4. A lithium battery circular tab according to claim 1, characterized in that, An insulating layer (8) is provided in the area where the connecting shell (4) and the circular tab (1) are in contact, and the thickness of the insulating layer (8) is 0.05-0.1mm.

5. A lithium battery circular tab according to claim 1, characterized in that, The connecting shell (4) has a sliding groove (11) on the side away from the circular tab (1). A sliding rod (12) is provided in the sliding groove (11). A spring (14) is arranged around the sliding rod (12). A slider (13) is slidably arranged on the sliding rod (12). One side of the slider (13) abuts against the spring (14). A post (10) is provided on the other side of the slider (13). The post (10) passes through the connecting shell (4) and is snapped onto the protective shell (5). The end of the post (10) that is snapped onto the protective shell (5) is rounded and chamfered.

6. A lithium battery circular tab according to claim 1, characterized in that, The protective shell (5) has a convex shape. The two sides of the bottom of the protective shell (5) are connected to the two sides of the outside of the battery body (2) by axle pins. Symmetrical insertion holes (15) are provided on both sides of the protective shell (5). The size and position of the insertion holes (15) correspond to the insertion post (10).

7. A lithium battery circular tab according to claim 6, characterized in that, The insertion hole (15) is provided with an outlet ramp (16) and an inlet ramp (17) on both sides respectively. The bottom end of the outlet ramp (16) faces the insertion hole (15), and the top end of the inlet ramp (17) faces the insertion hole (15).

Images