Square shell battery side seam pre-welding mechanism

Abstract

The utility model relates to the technical field of lithium battery manufacturing, in particular to a square shell battery side seam pre-welding mechanism which comprises a welding clamp, the welding clamp comprises an L-shaped bottom plate integrally formed by a transverse plate and a longitudinal plate, and the longitudinal plate of the L-shaped bottom plate is connected with a second rectangular block. One end of a transverse plate of the L-shaped bottom plate is movably connected with a plurality of L-shaped blocks, and the surfaces of the plurality of L-shaped blocks are respectively connected with a first rectangular block. According to the utility model, the combined battery bodies are placed between the L-shaped bottom plate and the L-shaped block, and the L-shaped block is pulled to move under the action of the elastic piece, so that the battery bodies of different models can be fixed and positioned, the pre-welding of single-edge side seams and double-edge side seams of the battery can be met, the falling of the battery during welding can be effectively prevented, and the welding quality of the battery can be improved. And meanwhile, the L-shaped block can prevent welding dust from entering the battery cell, so that the production quality of the power battery is ensured, the device is easy to operate and convenient to maintain and repair, and the labor and auxiliary material cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a side seam pre-welding mechanism for square shell batteries. Background Art

[0002] Power batteries are the power source for tools, primarily those used in electric vehicles, electric trains, electric bicycles, and golf carts. They are a core component of new energy vehicles and a key component of future energy transformation.

[0003] In the existing power battery production process, hard shell sealing welding is the main step. Before sealing welding, pre-welding must be performed to prevent welding deformation, uneven welding and other problems during the sealing welding process. Therefore, pre-welding must be performed before full welding. Pre-welding must meet the requirements of 360-degree rotation and dotting. The welding head and the battery must move synchronously, and the welding mechanism must not block the welding path. Therefore, in the current sealing pre-welding step, manual tape or a tightening mechanism is added to pre-fix the battery cover and the shell. After clamping, laser pre-welding is performed, and then the other end is re-taped or clamped to pre-weld the other end. After welding, the tape is removed or the mechanism is disassembled, and finally the sealing welding step is entered. The operation process is cumbersome and requires a certain amount of labor and auxiliary material costs. Utility Model Content

[0004] The utility model provides a side seam pre-welding mechanism for square shell batteries to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A side seam pre-welding welding mechanism for a square-shell battery includes a welding fixture, the welding fixture including an L-shaped bottom plate integrally formed by a transverse plate and a longitudinal plate, a second rectangular block connected to the longitudinal plate of the L-shaped bottom plate, a plurality of L-shaped blocks movably connected to one end of the transverse plate of the L-shaped bottom plate, a first rectangular block respectively connected to the surface of the plurality of L-shaped blocks, the welding fixture clamping the battery body a bonded to the surface of the L-shaped bottom plate through the first rectangular block and the second rectangular block, and an elastic member for pulling the L-shaped block connected to one end of the L-shaped block, and the other end of the elastic member connected to the L-shaped bottom plate.

[0007] The L-shaped base plate, L-shaped block and elastic member are used to clamp the battery body, solving the tedious problem of manually applying tape or clamping one end with a clamping mechanism and pre-welding the other end.

[0008] Preferably, a guide boss is provided at one end of the transverse plate of the L-shaped bottom plate, a U-shaped groove is formed between the two sides of the guide boss and the L-shaped bottom plate, the L-shaped block is movably connected in the U-shaped groove, and the elastic member is provided in the U-shaped groove.

[0009] Preferably, two L-shaped blocks are provided, and the two L-shaped blocks are symmetrically arranged in corresponding U-shaped grooves with the guide boss as the symmetry axis.

[0010] Preferably, the longitudinal plates of the L-shaped bottom plate are two hook blocks, and the two hook blocks correspond one to one to the two L-shaped blocks respectively.

[0011] Preferably, the top surface of the hook block and the longitudinal top surface of the L-shaped block are on the same horizontal plane, and the height of the hook block and the longitudinal height of the L-shaped block are both lower than the height of the battery body a.

[0012] Preferably, the elastic member is a tension band, and the tension band is made of rubber.

[0013] Preferably, the first rectangular block and the second rectangular block are respectively provided with anti-slip textures on the facing surfaces thereof.

[0014] Preferably, one of the L-shaped blocks corresponds to blocking the liquid filling port c on the battery body a.

[0015] Preferably, it also includes a welding tool for driving the L-shaped bottom plate to rotate and a welding gun b for pre-welding the battery shell a.

[0016] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0017] The L-shaped bottom plate is an L-shaped block which is used to hold the battery in place for a long time and to prevent the battery from falling off. The L-shaped bottom plate is an L-shaped block which is used to hold the battery in place for a long time and to prevent the battery from falling off. The L-shaped block ... BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the bottom structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the battery filling port structure of the present utility model;

[0021] Figure 4 This is a schematic diagram of the use of the welding mechanism of the present invention.

[0022] In the figure: 1. L-shaped bottom plate; 2. L-shaped block; 3. first rectangular block; 4. second rectangular block; 5. guide boss; 6. elastic member; 7. U-shaped groove; a. battery body; b. welding gun; c. liquid filling port. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification. Example

[0025] like Figure 1-4 As shown, the utility model provides a side seam pre-welding welding mechanism for a square shell battery, including a welding fixture, which includes an L-shaped bottom plate 1 integrally formed by a transverse plate and a longitudinal plate, a second rectangular block 4 is connected to the longitudinal plate of the L-shaped bottom plate 1, and a plurality of L-shaped blocks 2 are movably connected to one end of the transverse plate of the L-shaped bottom plate 1, and a first rectangular block 3 is respectively connected to the surface of the plurality of L-shaped blocks 2. The welding fixture clamps the battery body a that is in contact with the surface of the L-shaped bottom plate 1 through the first rectangular block 3 and the second rectangular block 4, and one end of the L-shaped block 2 is connected to an elastic member 6 for pulling the L-shaped block 2, and the other end of the elastic member 6 is connected to the L-shaped bottom plate 1.

[0026] In this embodiment, a guide boss 5 is provided at one end of the transverse plate of the L-shaped base plate 1, and a U-shaped groove 7 is formed between the two sides of the guide boss 5 and the L-shaped base plate 1. The L-shaped block 2 is movably connected in the U-shaped groove 7, and the elastic member 6 is provided in the U-shaped groove 7. There are two L-shaped blocks 2, and the two L-shaped blocks 2 are symmetrically arranged in the corresponding U-shaped grooves 7 with the guide boss 5 as the symmetry axis. The elastic member 6 is a tension belt, and the tension belt is made of rubber.

[0027] By using the elastic member 6 made of rubber material, the L-shaped block 2 can be pulled by the elastic member 6 when sliding left and right, so that the welding fixture can meet the needs of battery bodies of different lengths. The size of the pre-tightening force can be adjusted according to the action of the elastic member 6 to meet the requirements of the clamping force before welding.

[0028] In this embodiment, the longitudinal plates of the L-shaped bottom plate 1 are two hook blocks, and the two hook blocks correspond to the two L-shaped blocks 2 one by one. The top surface of the hook block and the longitudinal top surface of the L-shaped block 2 are on the same horizontal plane, and the height of the hook block and the longitudinal height of the L-shaped block 2 are both lower than the height of the battery body a.

[0029] The L-shaped base plate 1 and the L-shaped block 2 are both made of metal, which makes them more stable when used. The second rectangular block 4 is fixed to the hook block of the L-shaped base plate 1 by screws, and the first rectangular block 3 is fixed to the longitudinal direction of the L-shaped block 2 by screws, which can effectively prevent the battery from being scratched by contact with the metal block.

[0030] In this embodiment, the first rectangular block 3 and the second rectangular block 4 are respectively provided with anti-slip textures on their facing surfaces.

[0031] By setting anti-slip texture on the first rectangular block 3 and the second rectangular block 4, the stability of the battery body a after being clamped can be ensured to prevent it from falling off. Soft gaskets can be set on the opposite sides of the first rectangular block 3 and the second rectangular block 4, and the anti-slip texture is set on the soft gasket, which can protect the surface of the battery body a shell and prevent the shell from being pinched.

[0032] In this embodiment, one of the L-shaped blocks 2 corresponds to blocking the liquid filling port c on the battery body a.

[0033] like Figure 3 As shown, the width of the L-shaped block 2 is greater than the diameter of the liquid injection port c. When the L-shaped block 2 blocks the liquid injection port c on the battery body, it can effectively prevent smoke and dust from entering the battery cell during welding.

[0034] In this embodiment, it also includes a welding tool for driving the L-shaped bottom plate 1 to rotate and a welding gun b for pre-welding the battery shell a. The L-shaped block 2 can move linearly on the bottom plate to tighten the weld and the liquid filling port c.

[0035] The working principle and usage process of the present invention: when it is necessary to clamp the pre-welded battery shell, first combine the shell, battery cell and battery cover plate and put them between the hook block of L-shaped bottom plate 1 and L-shaped block 2, keep the L-shaped bottom plate 1 in full contact with the large surface of the battery, and according to the action of the elastic member 6, the elastic member 6 drives the L-shaped block 2 to exert a clamping force on the clamped object, effectively positioning the battery body completely, and preventing the battery body from falling off during welding. After the battery body is clamped, the L-shaped block 2 can block the liquid filling port c of the battery body, effectively preventing smoke and dust from entering the battery cell during welding. Therefore, this solution can meet the pre-welding of single-sided side seams and double-sided side seams of batteries of different models, as well as the fixation and positioning during welding, while preventing welding dust from entering the interior of the battery cell, thereby ensuring the production quality of power batteries.

[0036] In the present invention, the term "plurality" refers to two or more than two, unless otherwise expressly defined. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items. Terms such as "installation", "connection", "connection", and "fixed" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0037] It should be noted that when an element is referred to as being "assembled to," "mounted to," "fixed to," or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0038] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0039] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A square shell battery side seam pre-welding mechanism, characterized in that: The invention comprises a welding fixture, wherein the welding fixture comprises an L-shaped bottom plate (1) integrally formed by a transverse plate and a longitudinal plate, a second rectangular block (4) is connected to the longitudinal plate of the L-shaped bottom plate (1), a plurality of L-shaped blocks (2) are movably connected to one end of the transverse plate of the L-shaped bottom plate (1), and a first rectangular block (3) is respectively connected to the surface of the plurality of L-shaped blocks (2), the welding fixture clamps a battery body (a) attached to the surface of the L-shaped bottom plate (1) through the first rectangular block (3) and the second rectangular block (4), and an elastic member (6) for pulling the L-shaped block (2) is connected to one end of the L-shaped block (2), and the other end of the elastic member (6) is connected to the L-shaped bottom plate (1).

2. A square shell battery side seam pre-welding mechanism according to claim 1, characterized in that: A guide boss (5) is provided at one end of the transverse plate of the L-shaped bottom plate (1), and a U-shaped groove (7) is formed between the two sides of the guide boss (5) and the L-shaped bottom plate (1). The L-shaped block (2) is movably connected in the U-shaped groove (7), and the elastic member (6) is provided in the U-shaped groove (7).

3. A square shell battery side seam pre-welding mechanism according to claim 2, characterized in that: Two L-shaped blocks (2) are provided, and the two L-shaped blocks (2) are symmetrically arranged in corresponding U-shaped grooves (7) with the guide boss (5) as the symmetry axis.

4. A square shell battery side seam pre-welding mechanism according to claim 3, characterized in that: The longitudinal plates of the L-shaped bottom plate (1) are two hook blocks, and the two hook blocks correspond to the two L-shaped blocks (2) one by one.

5. A square shell battery side seam pre-welding mechanism according to claim 4, characterized in that: The top surface of the hook block and the longitudinal top surface of the L-shaped block (2) are on the same horizontal plane, and the height of the hook block and the longitudinal height of the L-shaped block (2) are both lower than the height of the battery body a.

6. A square shell battery side seam pre-welding mechanism according to claim 1, characterized in that: The elastic member (6) is a tension belt, and the tension belt is made of rubber.

7. The square shell battery side seam pre-welding mechanism according to claim 1, characterized in that: The first rectangular block (3) and the second rectangular block (4) are respectively provided with anti-slip textures on the facing sides.

8. The square shell battery side seam pre-welding mechanism according to claim 1, characterized in that: One of the L-shaped blocks (2) corresponds to blocking the liquid injection port (c) on the battery body (a).

9. The square shell battery side seam pre-welding mechanism according to claim 1, characterized in that: It also includes a welding tool for driving the L-shaped bottom plate (1) to rotate and a welding gun (b) for pre-welding the battery housing a.

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