Novel disc-type nickel-plated copper tab

Abstract

The utility model relates to the technical field of battery parts, and discloses a novel disc type copper nickel-plated tab, which comprises a shell, a closed disc, a tab, a lead and a control assembly, and the closed disc is fixed at the top of the shell to isolate external impurities; a plurality of mounting grooves are uniformly formed in the inner wall of the shell around the axis; groove side fixing grooves provide a mounting basis for a rotating roller; two ends of the rotating roller are sleeved with coil springs; a moving seat is fixed on a roller surface; the lower pressing plate is pushed through the moving seat, stable elastic downward pressing force is continuously provided for the tabs, the protection performance is greatly improved, a metal belt, tab glue and the external environment are isolated through a protection structure formed by the shell and the closed disc, the tab glue cracking and liquid leakage risks caused by tool collision are reduced, and deformation and deviation during stacking of multiple battery cells are prevented; connection stability is improved, and gaps caused by insufficient pressure are avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery component technology, and in particular to a novel disc-type copper-plated nickel tab. Background Technology

[0002] Disc-type copper-plated nickel tabs are core conductive components for power batteries and high-rate energy storage batteries. Thanks to the excellent conductivity of copper substrate and the corrosion resistance of nickel plating, they can be adapted to high-current charging and discharging scenarios. Moreover, the disc-type winding structure is compatible with automated production lines, making it one of the mainstream forms of tabs in the new energy field.

[0003] The metal strip and adhesive of the existing disc-type copper-plated nickel tabs are exposed to the external assembly environment. During the winding, conveying, cutting and positioning process of the automated production line, the edges of the tabs are easily scratched by the conveyor rollers and cutting tools, which leads to damage to the nickel plating and subsequent corrosion of the copper substrate by the electrolyte. If the tool is bumped during assembly, the adhesive of the tabs is prone to cracking, which will damage the sealing foundation between the tabs and the battery casing and increase the risk of leakage. In the scenario of multi-cell stacking of power battery modules, the unprotected tabs are also prone to deformation due to the squeezing of adjacent cells, which will cause the conductive path to be deviated.

[0004] The connection between existing disc-type copper-plated nickel tabs and external current collectors and connectors is mostly achieved by laser welding or rigid bolt crimping. Although the initial contact resistance of the welded connection is low, under the bumpy road conditions of the vehicle power battery and the long-term vibration environment of the energy storage battery, the weld is prone to micro-cracks due to metal fatigue, which leads to a sudden increase in contact resistance, causing local heating, and in severe cases, burning out the tab. Rigid bolt crimping cannot compensate for assembly tolerances, and is prone to crushing the tab adhesive due to excessive pressure, or forming contact gaps due to insufficient pressure, which also leads to a decrease in conductivity stability. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology has the disadvantage that the electrode tab cannot compensate for assembly tolerances during use. To this end, we propose a new type of disc-shaped copper-plated nickel electrode tab.

[0006] To achieve the above objectives, this application adopts the following technical solution: a novel disc-type copper-plated nickel electrode tab, comprising a housing, wherein the electrode tab is internally located within the housing, and a control component is internally located within the housing. The control component includes multiple mounting slots, which are formed on the inner wall of the housing. Fixing slots are formed on both sides of the inner wall of the mounting slots. A rotating roller is internally located within the mounting slots. Both ends of the rotating roller are rotatably connected to the bottom of the inner cavity of the fixing slots on both sides. Coil springs are sleeved on both ends of the rotating roller. A moving seat is fixedly sleeved on the surface of the rotating roller. A connecting seat is fixedly connected to the end of the moving seat away from the rotating roller. A lower pressure plate is fixedly connected to the end of the connecting seat away from the moving seat. The bottom of the lower pressure plate contacts the electrode tab.

[0007] Preferably, a sealing disc is fixedly connected to the top of the housing.

[0008] Preferably, the closed disk has threaded holes at both ends.

[0009] Preferably, a connecting hole is provided on one side of the housing.

[0010] Preferably, a wire is fixedly connected to one side of the electrode tab, and the end of the wire away from the electrode tab extends through the connecting hole to the outside of the housing.

[0011] Preferably, the plurality of mounting slots are evenly distributed around the housing axis.

[0012] Preferably, one end of the coil spring is fixedly connected to the rotating roller, and the other end of the coil spring is fixedly connected to the inner wall of the fixed groove.

[0013] Preferably, the fixing grooves on both sides are symmetrically distributed along the axis of the mounting groove.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] The core of this novel disc-type copper-plated nickel electrode consists of a shell, a closed disc, electrode tabs, wires, and control components: the closed disc is fixed at the top of the shell, and the threaded holes at both ends of the disc can securely install the shell while isolating external impurities; a connecting hole on one side of the shell allows the wires connected to the electrode tabs to pass through; multiple mounting grooves are evenly opened around the axis on the inner wall of the shell, and the fixing grooves on the sides of the grooves provide a mounting base for the rotating roller; coil springs are sleeved at both ends of the rotating roller, and a moving seat is fixed on the roller surface; the seat is connected to a lower pressure plate via a connecting seat, and the lower pressure plate contacts the electrode tabs. After the tabs are welded, the coil spring releases its elastic potential energy, causing the rotating roller to rotate in the opposite direction. This pushes the lower pressure plate through the motion seat and connecting seat, providing a continuous and stable elastic downward pressure to the tabs. This significantly improves the protective performance. The protective structure formed by the shell and the enclosed disc isolates the metal strip, tab adhesive, and external environment, preventing damage to the nickel plating and corrosion of the copper substrate caused by scratches on the tab edges during conveying and cutting. It also reduces the risk of tab adhesive cracking and leakage caused by tool impacts. Furthermore, it supports and limits the tabs, preventing deformation and displacement when multiple cells are stacked. It also improves connection stability. The elastic downward pressure can apply pre-tightening force to the weld joint, alleviating micro-cracks in the weld joint under vibration and bumps, maintaining stable contact resistance, and adaptively compensating for the assembly tolerances of rigid bolt crimping, preventing gaps caused by insufficient pressure, and ensuring conductivity stability. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2This is a schematic diagram of the overall exploded structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the assembly structure of the control component and the housing of this utility model;

[0020] Figure 4 This is an exploded view of the control component of this utility model;

[0021] Figure 5 This is a schematic diagram of the assembly structure of the lower pressure plate and the motion seat of this utility model.

[0022] Legend: 1. Housing; 101. Enclosed disc; 102. Threaded hole; 103. Communicating hole; 2. Electrode; 201. Wire; 3. Control component; 301. Mounting slot; 302. Fixing slot; 303. Rotating roller; 304. Coil spring; 305. Motion seat; 306. Connecting seat; 307. Lower pressure plate. Detailed Implementation

[0023] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0024] Reference Figures 1 to 5 As shown, this utility model provides a technical solution: a novel disc-type copper-plated nickel tab, including a housing 1, a closed disc 101 fixedly connected to the top of the housing 1, threaded holes 102 at both ends of the closed disc 101, a connecting hole 103 on one side of the housing 1, a tab 2 inside the housing 1, a wire 201 fixedly connected to one side of the tab 2, the end of the wire 201 away from the tab 2 extending through the connecting hole 103 to the outside of the housing 1, and a control component 3 inside the housing 1. The housing 1 achieves basic installation and protection through the cooperation of the housing 1 and the closed disc 101, and transmits and applies elastic pressure with the help of the control component 3. First, the threaded holes 102 at both ends of the closed disc 101 allow the housing 1 to be securely installed in the target position, preventing external impurities from entering the inner cavity of the housing 1; the connecting hole 103 on one side of the housing 1 provides an extension channel for the wire 201 connected to the tab 2, ensuring that the wire 201 can smoothly pass through the housing 1 and extend to the outside.

[0025] The control component 3 is provided with multiple mounting slots 301, which are opened on the inner wall of the housing 1. The multiple mounting slots 301 are evenly distributed around the axis of the housing 1. Fixing slots 302 are opened on both sides of the inner wall of the mounting slots 301. A rotating roller 303 is built into the mounting slot 301. The two ends of the rotating roller 303 are rotatably connected to the bottom of the inner cavity of the fixing slots 302 on both sides. A coil spring 304 is sleeved on both ends of the rotating roller 303. One end of the coil spring 304 is fixedly connected to the rotating roller 303, and the other end of the coil spring 304 is fixedly connected to the inner wall of the fixing slot 302. A motion seat 305 is sleeved and fixed on the surface of the rotating roller 303. A connecting seat 306 is fixedly connected to the end of the motion seat 305 away from the rotating roller 303. A lower pressure plate 307 is fixedly connected to the end of the connecting seat 306 away from the motion seat 305. The bottom of the lower pressure plate 307 is in contact with the electrode tab 2. Multiple mounting slots 301 are evenly distributed around the axis of the housing 1 on the inner wall of the housing 1 to ensure uniform force application. The fixing slots 302 on both sides of the inner wall of each mounting slot 301 provide a stable mounting base for the rotating roller 303. The two ends of the rotating roller 303 are rotatably connected to the bottom of the inner cavity of the fixing slot 302, allowing the rotating roller 303 to rotate flexibly. One end of the coil spring 304 sleeved at both ends of the rotating roller 303 is fixedly connected to the rotating roller 303, and the other end is fixedly connected to the inner wall of the fixing slot 302. The coil spring 304 can generate elastic deformation and store elastic potential energy as the rotating roller 303 rotates. The motion seat 305 fixedly sleeved on the surface of the rotating roller 303 will move synchronously with the rotation of the rotating roller 303. The connecting seat 306 connected to the end of the motion seat 305 away from the rotating roller 303 will transmit the displacement of the motion seat 305 to the lower pressure plate 307, so that the bottom of the lower pressure plate 307 is in close contact with the pole lug 2 inside the housing 1. After the electrode tab 2 is welded, the coil spring 304 releases the stored elastic potential energy, which drives the rotating roller 303 to rotate in the opposite direction. Through the motion seat 305 and the connecting seat 306, it pushes the pressure plate 307 to continuously provide stable elastic downward pressure for the electrode tab 2.

[0026] This design effectively solves multiple problems caused by exposed tab 2, significantly improving protective performance. Existing disc-type nickel-plated copper tabs 2, with their metal strip and adhesive exposed to the external assembly environment, are prone to damage during winding, conveying, cutting, and positioning due to scratches, or cracking of the adhesive when bumped by tools. They also deform under pressure when multiple cells are stacked. The new tab 2, through the complete protective structure formed by the housing 1 and the enclosed disc 101, isolates the metal strip and adhesive from the external environment, preventing direct contact between the conveyor rollers, cutting tools, and the edge of the tab 2. This prevents damage to the nickel plating and eliminates electrolyte corrosion of the copper substrate. Simultaneously, it reduces direct impact on the adhesive from tool bumps, lowering the probability of adhesive cracking and ensuring a tight seal with the battery housing 1, significantly reducing the risk of leakage. Furthermore, the housing 1 provides support and positioning for the tab 2, preventing deformation caused by adjacent cells being squeezed during multi-cell stacking, ensuring a stable conductive path and preventing conductive path deviation.

[0027] Simultaneously, it further improves the connection stability between the tab 2 and external components, avoiding abnormal contact resistance issues. When the existing tab 2 is laser-welded or rigidly bolted, the welded connection is prone to micro-cracks at the weld joint due to metal fatigue under bumpy and vibrating environments. This leads to a sudden increase in contact resistance, causing localized heating or even burning out the tab 2. Rigid bolting, on the other hand, cannot compensate for assembly tolerances, easily resulting in the crushing of the tab adhesive or the formation of contact gaps. The control component 3 of the new tab 2 provides elastic downward pressure after welding, applying a continuous and stable preload to the weld joint. This alleviates stress concentration at the weld joint under bumpy and vibrating environments, reduces micro-cracks caused by metal fatigue, maintains stable contact resistance, and avoids localized heating. For rigid bolting, the elastic downward pressure can adaptively compensate for assembly tolerances. When the bolt pressure is insufficient, the elastic force can supplement the pressure, ensuring tight contact between the tab 2 and external components, avoiding contact gaps, thereby ensuring conductive stability and maintaining good conductivity.

[0028] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A novel disc-type copper-plated nickel electrode tab, characterized in that, The device includes a housing, within which electrode tabs are built-in. The housing also contains a control assembly, which includes multiple mounting slots located on the inner wall of the housing. Fixing slots are formed on both sides of the inner wall of each mounting slot. A rotating roller is housed within each mounting slot. Both ends of the rotating roller are rotatably connected to the bottom of the inner cavities of the two fixing slots. Coil springs are sleeved on both ends of the rotating roller. A moving seat is fixedly fitted onto the surface of the rotating roller. A connecting seat is fixedly connected to the end of the moving seat away from the rotating roller. A lower pressure plate is fixedly connected to the end of the connecting seat away from the moving seat. The bottom of the lower pressure plate contacts the electrode tabs.

2. The novel disc-type copper-plated nickel electrode tab according to claim 1, characterized in that: A sealing disc is fixedly connected to the top of the shell.

3. The novel disc-type copper-plated nickel electrode tab according to claim 2, characterized in that: The closed disk has threaded holes at both ends.

4. The novel disc-type copper-plated nickel electrode tab according to claim 1, characterized in that: A connecting hole is provided on one side of the shell.

5. The novel disc-type copper-plated nickel electrode tab according to claim 1, characterized in that: A wire is fixedly connected to one side of the electrode tab, and the end of the wire away from the electrode tab extends through the connecting hole to the outside of the housing.

6. The novel disc-type copper-plated nickel electrode tab according to claim 1, characterized in that: The mounting slots are evenly distributed around the housing axis.

7. The novel disc-type copper-plated nickel electrode tab according to claim 1, characterized in that: One end of the coil spring is fixedly connected to the rotating roller, and the other end of the coil spring is fixedly connected to the inner wall of the fixed groove.

8. The novel disc-type copper-plated nickel electrode tab according to claim 1, characterized in that: The fixing grooves on both sides are symmetrically distributed along the axis of the mounting groove.

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