Fixing device for battery shell welding

Abstract

The utility model discloses a fixing device for welding a battery shell, which comprises a first supporting plate, a second supporting plate and a fixing device, the at least one accommodating cavity is formed in the first supporting plate and is used for placing a battery in a vertical state; the first clamping part is arranged on the first supporting plate and is used for fixing one end surface of the battery; and the second clamping part comprises a guide base arranged on the first supporting plate and a telescopic piece fixed to the guide base, and the telescopic piece stretches and retracts towards the direction of the first clamping part. The spot welding fixture is simple in structure, batteries placed in different directions can be effectively supported through the first supporting plate and the containing cavity formed in the upper supporting plate, the batteries placed in the different directions can be limited through the first clamping part, the second clamping part and the spot welding pressing tool, the stability of the batteries when the batteries are placed horizontally and vertically is guaranteed, and the working efficiency is improved. And therefore, the position stability during multi-surface welding of the battery is ensured.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing technology, specifically a fixing device for welding battery casings. Background Technology

[0002] Lithium-ion batteries, due to their advantages such as high energy density, low self-discharge rate, and no memory effect, have become a core energy solution for mobile devices, electric vehicles, and home energy storage systems. Their typical structure includes a battery core encapsulated within a battery casing, which usually consists of a housing and a cover plate. During battery assembly, after the battery core is installed into the housing, the cover plate must be fastened to the housing and fixed at the connection points by welding to ensure sealing and electrochemical stability.

[0003] Currently, battery welding processes primarily rely on automated welding fixtures, which offer high precision, efficiency, and stability, making them suitable for mass production. However, automated welding fixtures require precision sensors, drive devices, and complex programming, resulting in high manufacturing costs and making it difficult to meet the demands for low cost and flexible adjustments during the experimental prototyping stage. Therefore, manual welding fixtures are widely used in experimental or small-batch pilot production scenarios.

[0004] However, current manual welding fixtures typically employ a fixed or single adjustable structure, making it difficult to simultaneously accommodate welding the long and short sides of the battery casing. For example, welding the long side requires the fixture to provide a longer clamping range, while welding the short side requires precise positioning. Frequent switching of fixtures or adjustment of clamping positions can increase operational complexity and reduce efficiency. Therefore, a fixing device for welding battery casings is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a fixing device for welding battery casings, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fixing device for welding battery casings, comprising:

[0007] A first tray is used to place the battery in a flat position;

[0008] At least one receiving cavity is provided on the first tray for placing the battery in a vertical position;

[0009] A first clamping part, disposed on the first tray, is used to fix one end face of the battery; and

[0010] The second clamping part includes a guide base disposed on the first tray and a telescopic member fixed on the guide base. The telescopic member extends and retracts toward the first clamping part to fix and / or remove the battery located on the first tray.

[0011] The battery can be placed in either a vertical or horizontal position based on the cooperation between the first tray and the receiving cavity, thus accommodating the welding of the battery's long and short sides. The first and second clamping parts can clamp and fix the battery in either a vertical or horizontal position, preventing the battery from shifting during the welding process. The first clamping part can also be used to initially position the battery in either a vertical or horizontal position, ensuring that one side of the battery is always in contact with the first clamping part. Subsequently, depending on the size of the battery or the specific welding situation of the long and short sides, the second clamping part clamps and fixes the other side of the battery.

[0012] As a further embodiment of this utility model: the

[0013] The first clamping part includes:

[0014] The fixing seat is disposed on the first support plate;

[0015] Two first limiting plates are symmetrically arranged on both sides of the fixed base so that the battery in the flat state is restricted between the two first limiting plates.

[0016] The mounting bracket can secure one side of the battery, while the two first limiting plates can secure the front and rear ends of the battery, thus ensuring the battery's stable horizontal position. This design ensures that the battery's position will not shift when the other side is secured.

[0017] As a further embodiment of this utility model: the telescopic member includes:

[0018] A movable push block is connected to one end of a guide rod, and the other end of the guide rod is connected to a guide base, so that the movable push block moves along the length of the guide rod and abuts against the battery when it moves.

[0019] A driving component is installed on the guide base, and its telescopic end is connected to the movable push block, which is used to drive the movable push block to move along the length of the guide rod.

[0020] The movable push block contacts the surface of the battery to fix it in place, while the guide base provides stable support for the drive unit and guide rod. The guide rod restricts the movement direction of the movable push block, and the drive unit, as the drive source, can drive the movable push block to move along the length of the guide rod, thereby achieving clamping and fixing of batteries of different sizes or with welded long and short sides.

[0021] As a further embodiment of this utility model: the fixed base and the movable push block are both provided with abutting parts on the end faces near the battery. The abutting parts include an upper abutting block and a lower abutting block. A first clearance notch is formed in the area between the upper abutting block and the lower abutting block. A second clearance notch is provided on the lower abutting block. Both the first clearance notch and the second clearance notch are used to make way for the protruding positive and negative electrode plates of the battery casing.

[0022] The upper abutment block, the lower abutment block, and the first clearance notch ensure effective contact with the flat-lying battery and allow space for the positive and negative electrode plates protruding from the battery casing. Similarly, when the battery is placed vertically, the second clearance notch also allows space for the positive and negative electrode plates protruding from the battery casing.

[0023] As a further embodiment of this utility model, it also includes a spot welding fixture, which comprises:

[0024] At least one vertical guide rod is provided on a fixed base, and a movable plate located above the fixed base is movably sleeved on the outer periphery of the vertical guide rod;

[0025] A horizontal quick clamp, mounted on a fixed base, is used to apply pressure to the movable plate so that the movable plate is pressed firmly onto the battery.

[0026] The vertical guide rod restricts the movement direction of the moving plate, allowing it to move only along its length when fitted onto the guide rod. When the surface of the moving plate is in contact with the battery surface, the horizontal quick clamp applies pressure towards the battery to ensure that the moving plate is stably pressed on top of the battery, facilitating welding of the battery by external welding equipment.

[0027] As a further embodiment of this utility model: the movable plate is provided with the same number of through holes as the vertical guide rods, the vertical guide rods are located in the through holes, the through holes are adapted to the vertical guide rods, so that the movable plate can be accurately fitted onto the vertical guide rods. The number and position of the through holes and the vertical guide rods are consistent, ensuring that the state is the same and the direction is not deviated each time the movable plate is installed.

[0028] As a further embodiment of this utility model: the movable plate is provided with a pressure head that can press against the battery, and the end of the pressure head away from the movable plate is provided with multiple spot welding notches in parallel. With the setting of multiple spot welding notches, it is convenient to limit the spot welding position of the battery.

[0029] As a further embodiment of this utility model: a second tray is provided below the first tray, and at least one set of limiting parts for restricting the position of the battery is provided between the first tray and the second tray. The limiting part includes two limiting plates arranged in parallel, and the area between the two limiting plates is used to restrict the position of the battery, further ensuring that the position of the battery will not shift during the welding process.

[0030] As a further aspect of this utility model: the size of the receiving cavity opened on the first tray matches the distance between the two limiting plates, which facilitates better placement of the battery.

[0031] Compared with the prior art, the beneficial effects of this utility model are:

[0032] This application can effectively support batteries with different placement orientations by setting up a first tray and a receiving cavity opened on the upper tray. Furthermore, the first clamping part, the second clamping part, and the spot welding press can limit the position of batteries with different placement orientations, ensuring the stability of batteries when placed flat and vertically, and thus ensuring the positional stability of batteries during multi-sided welding. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the auxiliary fixture of this utility model with the battery placed flat.

[0034] Figure 2 This is a schematic diagram of the auxiliary fixture of this utility model with the battery placed vertically.

[0035] Figure 3 This is a schematic diagram of the first pallet of this utility model;

[0036] Figure 4 This is a schematic diagram of the first clamping part and the spot welding fixture assembly of this utility model;

[0037] Figure 5 This is a schematic diagram of the second clamping part of the present invention;

[0038] In the diagram: 1. Battery; 2. First support plate; 21. Receiving cavity; 3. Second support plate; 31. Limiting part; 4. First clamping part; 41. Fixed base; 42. First limiting plate; 5. Second clamping part; 51. Guide base; 52. Guide rod; 53. Movable push block; 54. Driving component; 6. Spot welding press; 61. Vertical guide rod; 62. Moving plate; 621. Press head; 622. Spot welding notch; 63. Horizontal quick clamp; 7. Abutment part; 71. Upper abutment block; 72. Lower abutment block; 73. Second clearance notch. Detailed Implementation

[0039] 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.

[0040] Please see Figure 1-5 In this embodiment of the utility model, a fixing device for welding a battery casing includes:

[0041] First tray 2, which is used to place battery 1 in a flat position;

[0042] At least one receiving cavity 21 is provided on the first tray 2 for placing the battery 1 in a vertical position;

[0043] The first clamping part 4 is disposed on the first support plate 2 and is used to fix one end face of the battery 1; and

[0044] The second clamping part 5 includes a guide base 51 disposed on the first tray 2 and a telescopic member fixed on the guide base 51. The telescopic member extends and retracts in the direction of the first clamping part 4 to fix and / or remove the battery 1 located on the first tray 2.

[0045] Specifically, the first tray 2 is rectangular, and its upper surface is set parallel to ensure that the battery 1 will not tilt when placed on the first tray 2, so that the subsequent welding equipment can weld the casing of the battery 1. The presence of the first tray 2 can provide stable support for the first clamping part 4 and the second clamping part 5, so as to ensure that the position of the first clamping part 4 and the second clamping part 5 relative to the first tray 2 will not change.

[0046] The receiving cavity 21 is opened in the middle area of ​​the first support plate 2, and the width of the receiving cavity 21 is adapted to the width of the battery 1 to ensure that the battery 1 can pass through the receiving cavity 21 in a vertical state. Under the action of the receiving cavity 21, the periphery of the battery 1 is fixed to ensure that the battery 1 will not move in the thickness direction.

[0047] The first clamping part 4 is detachably mounted on the end face of the first tray 2 where the battery is placed flat by bolts. When the first clamping part 4 needs to be replaced, it can be removed from the first tray 2 by rotating the bolts. Secondly, the function of the first clamping part 4 is to fix the battery 1 on the upper surface of the first tray 2.

[0048] The second clamping part 5 includes a guide base 51 disposed on the first tray 2 and a telescopic member fixed on the guide base 51. The guide base 51 is detachably mounted on the end face of the first tray 2 where the battery is placed flat by bolts. When the guide base 51 needs to be replaced, it can be removed from the first tray 2 by rotating the bolts. The telescopic member can fix the battery 1 on the upper surface of the first tray 2. By clamping the part of the battery 1 located above the first tray 2 by the telescopic member, the purpose of clamping and fixing the entire battery 1 is achieved.

[0049] Through the above technical solution, under the action of the first tray 2 and the receiving cavity 21, the battery 1 can be placed in two states: vertical or horizontal. There is no need to use two different clamps to place the vertical or horizontal battery 1 separately. At the same time, without changing the first clamping part 4 and the second clamping part 5, it can clamp and fix batteries 1 of different sizes, and can also clamp and fix batteries 1 in the vertical state. This ensures that when welding the long and short sides of the battery 1, it is only necessary to change the placement state of the battery 1 and clamp it with the first clamping part 4 and the second clamping part 5, without the need to use other clamps for auxiliary clamping.

[0050] Please see Figure 4 In one embodiment, preferably, the first clamping part 4 includes:

[0051] Fixing base 41, which is fixed to the end face of the first support plate 2; and

[0052] The first limiting plate 42 is symmetrically arranged on both sides of the fixing base 41 to limit the position of the battery 1.

[0053] Specifically, the fixing seat 41 is detachably mounted on the first support plate 2 by bolts, which facilitates the replacement of the fixing seat 41 by the subsequent staff after removing the bolts. The position of the fixing seat 41 relative to the first support plate 2 will not change. The fixing seat 41 can fix one side of the battery 1. Then, the two first limiting plates 42 are located on the front and rear end faces of the fixing seat 41 respectively, and the area between the two first limiting plates 42 can be used to limit the battery. This design ensures that when the battery 1 is clamped and fixed, it can be fixed first to ensure that the battery 1 will not shift during the subsequent clamping and fixing process.

[0054] By using the above technical solution, the battery 1 is placed in the area between the two first limiting plates 42, and then the end face of the battery 1 near the fixing seat 41 is pressed against the fixing seat 41 to achieve initial restriction of the position of the battery 1.

[0055] Please see Figure 5 In one embodiment, preferably, the telescopic member includes:

[0056] The movable push block 53 is connected to one end of the guide rod 52, and the other end of the guide rod 52 is connected to the guide base 51, so that the movable push block 53 moves along the length direction of the guide rod 52 when it moves and abuts against the battery 1.

[0057] The drive component 54 is installed on the guide base 51, and its telescopic end is connected to the movable push block 53 for driving the movable push block 53 to move.

[0058] Specifically,

[0059] The movable push block 53 maintains contact with the first support plate 2, and there are two guide rods 52. One end of each guide rod 52 is fixedly connected to the guide base 51. The movable push block 53 has two through holes for the guide rods 52 to pass through, so that the movable push block 53 is restricted by the guide rods 52 during movement, ensuring that it can only move along the length direction of the guide rods 52.

[0060] The driving component 54 is a push-pull quick clamp, which includes a flange seat and a push rod. The flange seat is fixed on the guide base 51, and the end of the push rod away from the flange seat is connected to the movable push block 53. The flange seat and the push rod are connected by a pressing head. By moving the position of the pressing head, the end of the push rod is extended or retracted to ensure that the position of the movable push block 53 connected to it also changes accordingly. (Push-pull quick clamps are existing technology and can be purchased directly from the market, so they will not be described in detail here.)

[0061] Through the above technical solution, the staff presses the pressing head, which causes the pressing head to drive the push rod to extend or retract. At this time, the extended or retracted push rod also drives the movable push block 53 to move together. At the same time, under the action of the guide rod 52 and the through hole on the movable push block 53, the movement direction of the movable push block 53 is restricted, ensuring that the movable push block 53 can abut against the other side of the battery 1, thereby cooperating with the fixed seat 41 to achieve the clamping and fixing of the battery 1 on the first tray 2.

[0062] Please see Figure 4-5 In one embodiment, preferably, the fixed base 41 and the movable push block 53 are provided with abutment portions 7 on the end faces of the battery 1. The abutment portion 7 includes an upper abutment block 71 and a lower abutment block 72. A first clearance notch is formed in the area between the upper abutment block 71 and the lower abutment block 72 to make way for the protruding positive and negative electrode plates of the battery casing. A second clearance notch 73 is provided on the lower abutment block 72.

[0063] Through the above technical solution, when the battery 1 is laid flat, the upper abutment block 71 and the lower abutment block 72 can ensure the effective positioning of the battery 1, and the first clearance notch can make way for the positive and negative electrode plates protruding from the battery casing. Similarly, when the battery 1 is laid vertically, the upper abutment block 71 and the lower abutment block 72 can abut against the surface of the battery 1, and the second clearance notch 73 can make way for the positive and negative electrode plates protruding from the battery casing, thereby ensuring that the battery 1 can be better fixed while avoiding the protruding parts of the battery, whether it is laid flat or vertically.

[0064] Please see Figure 4 In one embodiment, preferably, it further includes a spot welding fixture 6, the spot welding fixture 6 comprising:

[0065] Movable plate 62, which is located above fixed base 41;

[0066] At least one vertical guide rod 61 is provided on the fixed base 41 to limit the movement direction of the moving plate 62;

[0067] A horizontal quick clamp 63 is mounted on a fixed base 41 and is used to apply pressure to the movable plate 62 so that the movable plate 62 is pressed against the battery 1.

[0068] Specifically, the movable plate 62 has the same number of through holes as the vertical guide rods 61. The number of vertical guide rods 61 is not limited and can be selected according to the actual situation. In this embodiment, preferably, there are two vertical guide rods 61 and two through holes. The ends of the two vertical guide rods 61 pass through the two through holes respectively to prevent the movable plate 62 from rotating in the horizontal direction.

[0069] The flange seat of the horizontal quick clamp 63 is fixed on the fixed seat 41, which serves to fix the position. The pressing head of the horizontal quick clamp 63 is located above the moving plate 62, which can apply pressure to the top of the moving plate 62 (the horizontal quick clamp 63 is existing technology and can be purchased directly on the market, so it will not be described in detail here).

[0070] With the above technical solution, after the battery 1 is clamped and fixed, the moving plate 62 falls along the vertical guide rod 61 under its own gravity, so that the moving plate 62 abuts against the battery 1. Then, the staff presses the horizontal quick clamp 63, so that the pressing head of the horizontal quick clamp 63 applies pressure from above the moving plate 62 toward the direction close to the first support plate 2, so as to ensure that the moving plate 62 is fixed on the battery 1.

[0071] Please see Figure 4In one embodiment, preferably, the movable plate 62 has the same number of through holes as the vertical guide rods 61, and the vertical guide rods 61 pass through the through hole area so that the movable plate 62 is fitted onto the outer peripheral surface of the vertical guide rods 61.

[0072] Please see Figure 4 In one embodiment, preferably, the movable plate 62 is provided with a pressure head 621 that can press against the battery 1. The end of the pressure head 621 away from the movable plate 62 is provided with a plurality of spot welding notches 622. Furthermore, the arrangement of the plurality of spot welding notches 622 facilitates the external spot welding mechanism to spot weld the battery casing exposed at the spot welding notches 622, thereby defining the spot welding position on the battery casing.

[0073] Please see Figure 3 In one embodiment, preferably, a second tray 3 is provided below the first tray 2, and at least one set of limiting parts 31 for restricting the position of the battery 1 is provided between the first tray 2 and the second tray 3. The limiting part 31 includes two limiting plates arranged in parallel. The area between the two limiting plates is used to restrict the position of the battery 1. The size of the receiving cavity 21 opened on the first tray 2 matches the distance between the two limiting plates, so as to limit the two sides of the vertically placed battery 1, making it easier to put the battery 1 in.

[0074] The working principle and usage process of this utility model are as follows: First, the assembled battery 1 (including the casing, battery core, and cover plate) is placed flat on the first support plate 2, with the end of the casing and cover plate fastened facing the fixed base 41. At this time, the casing is limited between the two first limiting plates 42. Then, the push-pull quick clamp is activated to move the movable push block 53 towards the fixed base 41 until both ends of the battery 1 abut against the fixed base 41 and the upper abutment block 71 and lower abutment block 72 on the movable push block 53, respectively, thereby limiting the horizontal direction of the battery 1. Then, the horizontal quick clamp 63 is activated to move the moving plate 62 downward and drive the pressure head 621 to press against the upper end surface of the battery 1, thereby limiting the vertical direction of the battery 1. Then, the battery casing (the connection between the casing and the cover plate) located at the spot welding notch 622 is spot welded by an external welding mechanism. After spot welding is completed, the horizontal quick clamp 63 is activated again to release the moving plate 62; then the moving plate 62 is moved out along the vertical guide rod 61. At this time, the external welding mechanism can be used to perform full welding at the connection between the shell and the cover plate (i.e., straight welding along multiple spot welding points) to ensure that the shell and the cover plate on this surface are completely welded and fixed; then the push-pull quick clamp is activated to drive the movable push block 53 to move away from the fixed seat 41, the battery 1 is taken out and rotated 90° and inserted into the receiving cavity 21, and the battery 1 can abut against the second support plate 3. At this time, the shell is limited between a pair of vertical limiting plates, and its upper end can extend out of the first support plate 2, completing the vertical placement of the battery 1; then the clamping and welding steps described above are used to weld the side of the vertically placed battery facing upwards, and then the above steps are repeated to achieve welding of the four sides of the battery shell.

[0075] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0076] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A fixing device for welding battery casings, characterized in that, include: The first tray is used to place the battery in a flat position; At least one receiving cavity is provided on the first tray for placing the battery in a vertical position; A first clamping part, disposed on the first tray, is used to fix one end face of the battery; and The second clamping part includes a guide base disposed on the first tray and a telescopic member fixed on the guide base. The telescopic member extends and retracts toward the first clamping part to fix and / or remove the battery located on the first tray.

2. The fixing device for welding battery casing according to claim 1, characterized in that, The first clamping part includes: The fixing seat is disposed on the first support plate; Two first limiting plates are symmetrically arranged on both sides of the fixed base so that the battery in the flat state is restricted between the two first limiting plates.

3. The fixing device for welding battery casing according to claim 2, characterized in that, The telescopic component includes: A movable push block is connected to one end of a guide rod, and the other end of the guide rod is connected to a guide base, so that the movable push block moves along the length of the guide rod and abuts against the battery when it moves. A driving component is installed on the guide base, and its telescopic end is connected to the movable push block, which is used to drive the movable push block to move along the length of the guide rod.

4. The fixing device for welding battery casing according to claim 3, characterized in that, Both the fixed base and the movable push block have abutment portions on their end faces near the battery. The abutment portions include an upper abutment block and a lower abutment block. A first clearance notch is formed in the area between the upper abutment block and the lower abutment block. A second clearance notch is provided on the lower abutment block. Both the first clearance notch and the second clearance notch are used to make way for the protruding positive and negative electrode plates of the battery casing.

5. The fixing device for welding battery casing according to claim 2, characterized in that, It also includes spot welding fixtures, which include: At least one vertical guide rod is provided on a fixed base, and a movable plate located above the fixed base is movably sleeved on the outer periphery of the vertical guide rod; A horizontal quick clamp, mounted on a fixed base, is used to apply pressure to the movable plate so that the movable plate is pressed firmly onto the battery.

6. The fixing device for welding battery casing according to claim 5, characterized in that, The movable plate has the same number of through holes as the vertical guide rods, and the vertical guide rods are located in the through holes.

7. The fixing device for welding battery casing according to claim 6, characterized in that, The movable plate is provided with a pressure head that can press against the battery, and the end of the pressure head away from the movable plate has multiple spot weld notches arranged side by side.

8. The fixing device for welding battery casing according to claim 1, characterized in that, A second tray is provided below the first tray, and at least one set of limiting parts for restricting the position of the battery is provided between the first tray and the second tray. The limiting part includes two limiting plates arranged in parallel, and the area between the two limiting plates is used to restrict the position of the battery.

9. The fixing device for welding battery casing according to claim 8, characterized in that, The size of the receiving cavity opened on the first pallet matches the distance between the two limiting plates.

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