Battery shell laser spot welding support

Abstract

The utility model provides a laser spot welding support for a battery shell, and belongs to the technical field of laser welding equipment. Comprising a support base, a rear support, a lower support and an upper support. The rear bracket and the lower bracket are fixedly arranged on the bracket base; the upper bracket is movably arranged on the lower bracket; one end of the lower support is provided with a supporting groove position, and the other end of the lower support is provided with an extending supporting plate. The lithium battery shell can be vertically embedded into the supporting groove position of the lower support, the lithium battery shell is fastened from the front side and the rear side through the rear support and the upper support, it is ensured that in the spot welding process, the lithium battery shell is always kept vertically positioned, and the stability of the spot welding process is improved. The lengths of a plurality of nickel straps can be always kept consistent through the additionally arranged nickel strap length positioning step; and the position of the nickel strap can be accurately limited through the additionally arranged nickel strap positioning groove position, and placement deviation is avoided. And through the synergistic effect of the two, welding errors caused by positioning deviation are effectively reduced, and the welding quality and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of laser welding equipment technology, and in particular to a laser spot welding bracket for battery casing. Background Technology

[0002] A lithium-ion battery pack integrates numerous components, including battery cells, protection circuits, connectors (such as nickel strips), and the casing, into a fully functional, ready-to-use battery assembly. In this process, a laser spot welding bracket serves as a crucial auxiliary tool, ensuring the precise and stable positioning of the battery casing and nickel strip during the spot welding process. It is primarily used for vertically positioning and fixing the lithium-ion battery casing, or for laser spot welding between the nickel strip and the casing at a relatively vertical position. Common materials for laser spot welding brackets include steel and copper. When performing laser spot welding on lithium-ion battery casings, vertically fixing the casing with the bracket effectively prevents displacement during the welding process, thus avoiding misalignment and improving the consistency of the hardware height of the welded battery casing.

[0003] Currently, the conventional method for fixing battery casings with laser spot welding brackets involves vertically supporting the battery casing and nickel strip, then pressing them together at the spot welding position before performing the laser spot welding operation. Existing laser spot welding brackets have the following shortcomings: They typically use upper and lower brackets to press the discharge terminals on the battery casing together. However, since the battery casing is made of plastic, its support strength is significantly insufficient, affecting the stability of the spot welding process. Furthermore, the nickel strip is mainly positioned manually by visual inspection, which is not only difficult but also inefficient, making it hard to ensure the consistency of the nickel strip's length and position. These problems seriously affect the quality and efficiency of laser spot welding; therefore, a new type of laser spot welding bracket for battery casings is needed to solve these problems. Utility Model Content

[0004] To address the technical problems existing in current laser spot welding brackets, this utility model provides a laser spot welding bracket for battery casings, which enhances the stability of the spot welding process and improves the quality and efficiency of laser spot welding.

[0005] This utility model provides a laser spot welding bracket for battery casing, including a bracket base, a rear bracket, a lower bracket, and an upper bracket; the rear bracket and the lower bracket are both fixedly mounted on the bracket base; the upper bracket is movably placed on the lower bracket; one end of the lower bracket is provided with a support groove, and the other end of the lower bracket is provided with an extension support plate.

[0006] Preferably, a plurality of nickel strip positioning slots are arranged parallel to the length direction of the extended support plate.

[0007] Preferably, a nickel strip length positioning step is provided at the end of the nickel strip positioning groove, and the nickel strip length positioning step is arranged along the width direction of the extension support plate.

[0008] Preferably, the extension support plate of the lower bracket is provided with a battery casing metal welding support position at the front end near the nickel strip positioning groove.

[0009] Preferably, cylindrical positioning holes are provided on both sides of the upper bracket, and matching cylindrical positioning pins are provided on both sides of the lower bracket.

[0010] Preferably, the rear bracket and the lower bracket can be fixedly mounted on the bracket base by bolts.

[0011] Preferably, the rear bracket and the lower bracket can be fixedly mounted on the bracket base by welding.

[0012] Preferably, the bracket base and the lower bracket are connected by a positioning pin that passes through the lower bracket and the bracket base in sequence, and the bracket base and the lower bracket are fixedly connected by bolts.

[0013] Preferably, the upper bracket and the lower bracket are movably connected by a positioning pin that passes through the upper bracket and the lower bracket in sequence.

[0014] Preferably, the fixed connection between the rear bracket and the bracket base is magnetic fixation.

[0015] In summary, this utility model has the following beneficial effects:

[0016] I. The protected point and key innovation of this application is the improvement of the metal welding support method, which changes the original plastic shell support of the product to a metal support; and at the same time changes the welding direction, improves the production process, and increases production efficiency.

[0017] Second, this application optimizes the overall support structure by changing the support method for the battery casing from the previous horizontal support to a vertical support method via a lower bracket. The lithium battery casing can be vertically embedded into the support slot of the lower bracket and locked securely; then, the lithium battery casing is secured from both the front and rear sides by the rear bracket and the upper bracket, providing sufficient planar support for the hardware components; ensuring that the lithium battery casing remains vertically positioned and stable during the spot welding process, increasing the stability of the spot welding process. Simultaneously, an extension support plate is provided at the other end of the lower bracket, which is used to perform the laser spot welding operation between the nickel strip and the battery casing.

[0018] Third, this application ensures that the length of multiple nickel strips remains consistent during placement by adding a nickel strip length positioning step; the added nickel strip positioning groove precisely defines the nickel strip position, avoiding placement deviations. These two features work synergistically to greatly improve the accuracy of positioning between the nickel strip and the battery casing, effectively reducing welding errors caused by positioning deviations and improving welding quality. Simultaneously, operators only need to place the nickel strip in the corresponding position as required to complete the positioning, significantly reducing operational difficulty and improving spot welding efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a laser spot welding bracket for a battery casing according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of a laser spot welding bracket for a battery casing (excluding the upper bracket) according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of a laser spot welding bracket (with battery casing) for a battery casing according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1. Bracket base; 2. Rear bracket; 3. Lower bracket; 4. Upper bracket; 5. Battery casing; 31. Support slot; 32. Extension support plate; 33. Nickel strip positioning slot; 34. Nickel strip length positioning step; 35. Cylindrical positioning pin; 36. Battery casing metal welding support position; 41. Cylindrical positioning hole. Detailed Implementation

[0023] 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 embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, the various features in each embodiment can be combined with each other. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, 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 the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] like Figures 1-3 As shown, the novel battery casing laser spot welding bracket of this application includes a bracket base, a rear bracket, a lower bracket, and an upper bracket. The rear bracket and the lower bracket are both fixedly mounted on the bracket base, specifically by bolts or welding. For ease of operation, the rear bracket can be magnetically fixed on the bracket base. The upper bracket is movably placed on the lower bracket. One end of the lower bracket is provided with a support groove, the size and shape of which are adapted to the lithium battery casing. The other end of the lower bracket is provided with an extension support plate, which is used to perform laser spot welding between the nickel strip and the battery casing.

[0027] The lithium battery casing of this application can be vertically embedded into the support slot of the lower bracket and locked securely; then the lithium battery casing is fastened from the front and rear sides by the rear bracket and the upper bracket, so that the hardware components have sufficient strength of planar support; ensuring that the lithium battery casing always remains vertically positioned and stable during the spot welding process, thereby enhancing the stability of the spot welding process.

[0028] In some optimized embodiments, to improve the accuracy and consistency of nickel strip placement, multiple nickel strip positioning slots are arranged parallel to the length of the extension support plate of the lower bracket. These slots ensure that the nickel strip maintains a high degree of consistency in position each time it is placed. At the end of each nickel strip positioning slot on the extension support plate of the lower bracket, a nickel strip length positioning step is provided. This step is arranged along the width of the extension support plate and effectively ensures that the lengths of the multiple placed nickel strips are all consistent.

[0029] In some optimized embodiments, cylindrical positioning holes are provided on both sides of the upper bracket, and matching cylindrical positioning pins are provided on both sides of the lower bracket. The upper bracket is placed on top of the lower bracket, allowing the cylindrical positioning pins to be precisely inserted into the cylindrical positioning holes, thus achieving precise fixation of the upper and lower brackets and maintaining their relative positions.

[0030] In some optimized embodiments, multiple battery casing metal welding support positions are provided on the extended support plate of the lower bracket, near the front end of the nickel strip positioning groove. The battery casing is provided with battery discharge terminals, which are made of copper-plated gold hardware. The discharge terminals need to be supported when welding the nickel strip. The battery casing metal welding support positions are used to support the discharge terminals and nickel strip during welding to prevent collapse or gaps between the discharge terminals and nickel strip during welding, which would lead to poor welding.

[0031] In some optimized embodiments, the bracket base and the lower bracket are positioned by cylindrical positioning holes that pass through the lower bracket and the bracket base in sequence, and the bracket base and the lower bracket are fixedly connected by bolts.

[0032] In some optimized embodiments, the upper and lower supports are connected by a cylindrical locating pin that passes through the upper and lower supports sequentially.

[0033] When using the battery casing laser spot welding bracket of this application, first place the battery casing in the support slot of the lower bracket to fix the battery casing vertically in the support slot; when performing laser spot welding between the nickel strip and the battery casing, first place the nickel strip on one side of the nickel strip length positioning step to position it, and then place multiple nickel strips into the nickel strip positioning slots in sequence to achieve precise positioning of the nickel strips. Then place the upper bracket on the lower bracket to ensure that the lithium battery casing remains vertically positioned during the spot welding process. Finally, perform the spot welding operation to complete the spot welding between the nickel strip and the lithium battery casing.

[0034] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A laser spot welding bracket for a battery casing, characterized in that: It includes a support base, a rear support, a lower support, and an upper support; the rear support and the lower support are both fixedly mounted on the support base; the upper support is movably placed on the lower support; one end of the lower support is provided with a support groove, and the other end of the lower support is provided with an extension support plate.

2. The battery casing laser spot welding bracket according to claim 1, characterized in that: Multiple nickel strip positioning slots are arranged parallel to the length direction of the extended support plate.

3. The laser spot welding bracket for a battery casing according to claim 2, characterized in that: A nickel strip length positioning step is provided at the end of the nickel strip positioning groove, and the nickel strip length positioning step is arranged along the width direction of the extension support plate.

4. The battery casing laser spot welding bracket according to claim 2, characterized in that: The extended support plate of the lower bracket has a battery casing metal welding support position at the front end near the nickel strip positioning groove.

5. The battery casing laser spot welding bracket according to claim 1, characterized in that: The upper bracket has cylindrical positioning holes on both sides, and the lower bracket has matching cylindrical positioning pins on both sides.

6. The battery casing laser spot welding bracket according to claim 1, characterized in that: The rear bracket and the lower bracket can be fixedly mounted on the bracket base by bolts.

7. The battery casing laser spot welding bracket according to claim 1, characterized in that: The rear bracket and the lower bracket can be fixedly mounted on the bracket base by welding.

8. The battery casing laser spot welding bracket according to claim 1, characterized in that: The bracket base and the lower bracket are connected by a cylindrical positioning hole that passes through the lower bracket and the bracket base in sequence. The bracket base and the lower bracket are fixedly connected by bolts.

9. A laser spot welding bracket for a battery casing according to claim 1, characterized in that: The upper and lower supports are connected by cylindrical locating pins that pass through them sequentially.

10. A laser spot welding bracket for a battery casing according to claim 1, characterized in that: The rear bracket and the bracket base are fixed by magnetic attraction.

Images