A high-power battery tab welding reinforcement structure

Abstract

The utility model discloses a kind of high-power battery tab welding reinforcement structures, belong to battery manufacturing technical field.The structure includes the reinforcing assembly of elastic tooth engagement reinforcement to tab and busbar welding place, and the fixed component for locking the reinforcing assembly.The reinforcing assembly is engaged by the tooth-shaped block in inside and the tooth-shaped groove on welding piece, and utilizes spring to exert elastic pressure;Fixed component is stabilized locking by clamping rod mechanism.The utility model solves the problem of insufficient welding point connection strength, easy to loosen and fall off in prior art by double reinforcement mode, significantly improves the mechanical strength and reliability of connection.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a welding reinforcement structure for high-power battery tabs. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage industries, the application of high-power batteries is becoming increasingly widespread. These batteries need to carry and conduct large currents when working and are often in complex working environments such as vibration and impact.

[0003] In the manufacturing process of battery modules, the connection between the battery cell's tabs and the external busbar is a critical step. Welding is usually used to ensure low contact resistance and high conductivity. This welded point is not only the core path for current transmission, but also a structural weak point. During long-term use, the welded point will be subjected to two types of stress: first, the mechanical vibration and impact generated by vehicle driving or equipment operation; second, the cyclic thermal stress caused by the thermal expansion and contraction effect when a large current passes through. These two stresses act together on the welded point and its surrounding area, which can easily lead to metal fatigue, microcracks, and gradual propagation.

[0004] Once a crack expands to a certain extent, it will lead to increased contact resistance at the weld point, localized overheating, and in severe cases, even breakage of the connection point, i.e., detachment. This failure not only affects the battery's performance and lifespan but also poses serious safety hazards. Existing reinforcement methods are often relatively simple, such as relying solely on the strength of the weld itself or using simple pressure plates for fixation. These methods are insufficient to effectively disperse and resist complex composite stresses and cannot provide long-term, stable, and reliable mechanical protection for the weld point.

[0005] Therefore, this utility model proposes a high-power battery tab welding reinforcement structure to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a high-power battery tab welding reinforcement structure, which aims to improve the problem in the prior art that the welding point between the high-power battery tab and the busbar has insufficient structural strength and is prone to loosening and falling off under vibration or stress, resulting in low connection reliability.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a high-power battery electrode tab welding reinforcement structure, comprising: electrode tab, busbar, reinforcement component and fixing component.

[0008] The reinforcing component includes an upper pressure sleeve and a lower pressure sleeve, and a toothed block and a spring are provided inside; the core structure of the fixing component includes a fixing sleeve and a locking rod.

[0009] The reinforcing component is assembled with the electrode and busbar by covering the weld joint. The toothed block inside the component engages with the toothed groove on the electrode and busbar. The fixing component is assembled and connected with the reinforcing component. The locking rod of the fixing component can be driven to engage with the internal slot of the fixing sleeve, thereby locking the reinforcing component.

[0010] Preferably, the upper pressure sleeve and the lower pressure sleeve are detachably fitted together to form a cavity for accommodating the weld joint.

[0011] Preferably, the reinforcement assembly further includes a pressure plate and a telescopic rod, the toothed block is disposed on the pressure plate, and the pressure plate compresses the spring through the telescopic rod to apply elastic pressure to the welding point.

[0012] Preferably, the fixing component further includes a knob, a screw, and a slider, wherein the knob is linked to the screw, and the screw is threadedly engaged with the slider to drive the movement of the locking lever.

[0013] Preferably, the fixing component further includes a connecting plate, and the slider is connected to the locking rod via the connecting plate.

[0014] Preferably, the fixing component further includes a limiting sleeve, which is used to limit the movement trajectory of the slider and the connecting plate to ensure the stability of the locking process.

[0015] Preferably, the fixing component further includes a fixing plate and a positioning block, wherein the positioning block is used to achieve positioning and fitting between the fixing plate and the fixing sleeve.

[0016] Preferably, the fixing component further includes a mounting sleeve, which is slidably fitted inside the fixing sleeve.

[0017] This utility model has the following beneficial effects: 1. In this utility model, the toothed blocks set inside the upper and lower pressure sleeves engage with the toothed grooves on the electrode ears and busbars, and in conjunction with the spring assembly, apply continuous elastic pressure. This solves the problem in the prior art where the welding points are only reinforced by simple pressing, resulting in insufficient connection strength and easy loosening or detachment under vibration or stress. It achieves a dual reinforcement effect combining physical locking and elastic pressing, greatly improving the mechanical strength and connection reliability of the weld.

[0018] 2. In this utility model, the linkage mechanism of the screw, slider and connecting plate driven by the knob is used to extend the locking rod to achieve locking. This solves the problem that the reinforcement device itself may be displaced or loosened due to external vibration, which may lead to a decrease or failure of the reinforcement effect. It achieves the effect of secondary stabilization and locking of the entire reinforcement component, ensuring the long-term stability and effectiveness of the reinforcement structure. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a high-power battery tab welding reinforcement structure proposed in this utility model; Figure 2 This is a schematic diagram of the busbar structure of a high-power battery electrode tab welding reinforcement structure proposed in this utility model; Figure 3 This is a schematic diagram of the reinforcement component of a high-power battery electrode tab welding reinforcement structure proposed in this utility model; Figure 4 This is a schematic diagram of the fixing component of a high-power battery electrode tab welding reinforcement structure proposed in this utility model; Figure 5 This is a schematic diagram of the internal structure of the mounting sleeve for a high-power battery electrode tab welding reinforcement structure proposed in this utility model.

[0020] Legend: 1. Electrode; 2. Busbar; 3. Reinforcing assembly; 301. Upper pressure sleeve; 302. Lower pressure sleeve; 303. Toothed groove; 304. Telescopic rod; 305. Spring; 306. Pressure plate; 307. Toothed block; 4. Fixing assembly; 401. Fixing sleeve; 402. Fixing plate; 403. Positioning block; 404. Mounting sleeve; 405. Knob; 406. Screw; 407. Slider; 408. Connecting plate; 409. Clamping rod; 410. Limiting sleeve. Detailed Implementation

[0021] 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.

[0022] Reference Figures 1-5 This utility model provides an embodiment of a high-power battery tab welding reinforcement structure, which aims to solve the problem that the mechanical strength of the connection point between the high-power battery tab and the busbar is insufficient after welding in the prior art, and that it is easy to fail and fall off under vibration or stress.

[0023] This high-power battery tab welding reinforcement structure acts on the tab 1 and busbar 2 of the [welded connection]. It includes a reinforcement component 3 and a fixing component 4 [assembled and connected with the reinforcement component 3]. The reinforcement component 3 is used to directly [cover] the weld joint between the tab 1 and the busbar 2, and provides initial reinforcement to the weld joint through internal physical engagement and elastic pressure. The fixing component 4 is used to lock the reinforcement component 3 after the reinforcement action is completed to prevent it from loosening or displacement, thereby achieving double stability of the weld joint. The reinforcing component 3 includes an upper pressure sleeve 301 and a lower pressure sleeve 302 that cooperate with each other. The upper pressure sleeve 301 and the lower pressure sleeve 302 [removably cooperate] together form an internal cavity that can accommodate the weld joint. Pressure plates 306 are movably arranged inside the upper pressure sleeve 301 and the lower pressure sleeve 302. A toothed block 307 is fixedly connected to the bottom of the pressure plate 306. The end of the pressure plate 306 [away from the toothed block 307] abuts against a spring 305 through a telescopic rod 304.

[0024] Toothed grooves 303 are correspondingly formed on the surfaces of the tab 1 and the busbar 2. The shape and size of the toothed grooves 303 are adapted to the toothed blocks 307. In the assembled state, when the upper pressure sleeve 301 and the lower pressure sleeve 302 are pressed together, the toothed blocks 307 inside are embedded and engaged in the toothed grooves 303 of the tab 1 and the busbar 2. At the same time, the pressure plate 306 squeezes the telescopic rod 304 and compresses the spring 305. The compressed spring 305 generates a continuous elastic force. This structure, which combines toothed engagement with elastic pressure, ensures the firmness and reliability of the initial reinforcement of the welding point.

[0025] The internal drive mechanism of the fixing component 4 includes a knob 405, a screw 406, a slider 407, and a connecting plate 408. The knob 405 is rotatably connected to the screw 406, the screw 406 is threadedly fitted with the slider 407, and the slider 407 is connected to the locking rod 409 via the connecting plate 408. To ensure the accuracy of the movement, the fixing component 4 is also provided with a limiting sleeve 410, which limits the movement trajectory of the slider 407 and the connecting plate 408. In addition, to facilitate the overall installation and positioning, the fixing component 4 also includes a fixing plate 402, a positioning block 403, and a mounting sleeve 404. The mounting sleeve 404 is slidably fitted inside the fixing sleeve 401, while the positioning block 403 is used to achieve the positioning and fit of the fixing plate 402 and the fixing sleeve 401.

[0026] Working principle: During reinforcement, the upper pressure sleeve 301 and lower pressure sleeve 302 of the reinforcement component 3 are first aligned and pressed together at the welding point of the electrode 1 and the busbar 2. During this process, the toothed blocks 307 inside the upper pressure sleeve 301 and lower pressure sleeve 302 will engage with the pre-set toothed grooves 303 on the electrode 1 and the busbar 2 to form a physical engagement. At the same time, after the pressure plate 306 is pressed, it compresses the spring 305 through the telescopic rod 304. The elastic force of the spring 305 is used to apply a continuous clamping force to the welding point, thereby completing the elastic toothed reinforcement of the welding point.

[0027] After the initial reinforcement is completed, the fixing component 4 is assembled onto the reinforcement component 3. The fixing plate 402 is made to fit with the fixing sleeve 401 by the positioning block 403, and the mounting sleeve 404 is slid into the inside of the fixing sleeve 401. Then, the knob 405 is rotated, which drives the screw 406 to rotate. The screw 406 drives the slider 407, which is threaded to it, to move linearly. The slider 407 pushes the locking rod 409 outward through the connecting plate 408 until the locking rod 409 is engaged in the [internal slot] of the fixing sleeve 401. Under the limiting action of the limiting sleeve 410, the entire locking process is stable and without deviation. Finally, the reinforcement component 3 is firmly locked in the working position. Through the synergistic effect of the reinforcement component 3 and the fixing component 4, this utility model effectively solves the problem that the welding point is easy to loosen or fall off due to insufficient structural strength in the prior art, and significantly improves the reliability of the connection.

Claims

1. A high-power battery electrode tab welding reinforcement structure, comprising: Polar ear (1); Busbar (2), the busbar (2) is welded to the tab (1); A reinforcing component (3), which covers the weld between the tab (1) and the busbar (2); a fixing component (4), which is assembled and connected to the reinforcing component (3) to lock it in place, characterized in that: The reinforcement component (3) includes an upper pressure sleeve (301) and a lower pressure sleeve (302). The upper pressure sleeve (301) and the lower pressure sleeve (302) are provided with toothed blocks (307) and springs (305). The pole lugs (1) and the busbar (2) are provided with toothed grooves (303) that mesh with the toothed blocks (307). The fixing component (4) includes a fixing sleeve (401) and a locking rod (409), the locking rod (409) being drivable to engage with the internal slot of the fixing sleeve (401).

2. The high-power battery tab welding reinforcement structure according to claim 1, characterized in that, The upper pressure sleeve (301) and the lower pressure sleeve (302) are detachably fitted to form a cavity to accommodate the weld joint.

3. A high-power battery tab welding reinforcement structure according to claim 1 or 2, characterized in that, The reinforcement component (3) also includes a pressure plate (306) and a telescopic rod (304). The toothed block (307) is disposed on the pressure plate (306). The pressure plate (306) compresses the spring (305) through the telescopic rod (304) to apply elastic pressure to the toothed block (307).

4. The high-power battery tab welding reinforcement structure according to claim 1, characterized in that, The fixing component (4) also includes a knob (405), a screw (406) linked to the knob (405), and a slider (407) threadedly engaged with the screw (406), the slider (407) being used to drive the lever (409) to move.

5. The high-power battery tab welding reinforcement structure according to claim 4, characterized in that, The fixing component (4) also includes a connecting plate (408), and the slider (407) is connected to the lever (409) via the connecting plate (408) [transmission connection].

6. The high-power battery tab welding reinforcement structure according to claim 5, characterized in that, The fixing component (4) also includes a limiting sleeve (410), which is used to limit the movement trajectory of the slider (407) and the connecting plate (408).

7. The high-power battery tab welding reinforcement structure according to claim 1, characterized in that, The fixing component (4) further includes a fixing plate (402) and a positioning block (403), wherein the positioning block (403) is used to achieve the positioning and fitting of the fixing plate (402) and the fixing sleeve (401).

8. The high-power battery tab welding reinforcement structure according to claim 7, characterized in that, The fixing component (4) further includes a mounting sleeve (404) which is slidably fitted into the fixing sleeve (401).

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