Battery cell module welding and pressing mechanism and welding device

Abstract

The utility model discloses a battery cell module welding and pressing mechanism and a welding device.The battery cell module welding and pressing mechanism comprises a movable base and n sets of pressing pieces, each set of pressing pieces comprises m first pressing blocks, the first pressing blocks are movably installed on the movable base through elastic assemblies, each first pressing block corresponds to one welding position of the battery cell module, each welding position is provided with one pole column, the first pressing blocks are configured to press the pole columns and the bus bars at the corresponding welding positions, and m and n are positive integers; a cavity is formed in each first pressing block in a penetrating mode, m * n receding holes are formed in the movable base, and each receding hole corresponds to the cavity of the corresponding first pressing block. And after the first pressing blocks press the pole columns and the confluence pieces at the corresponding welding positions, welding execution bodies of the welding mechanism sequentially penetrate through one corresponding set of receding holes and cavities so as to weld the welding positions pressed by the first pressing blocks.

Description

Technical Field

[0001] This application belongs to the technical field of production equipment for battery cell modules, and particularly relates to a welding and pressing mechanism for battery cell modules and a welding device. Background Technique

[0002] During the processing of battery cell modules, it is necessary to weld the pole columns of the battery cell modules to the bus bars through a welding device. Usually, one bus bar collects the pole columns of at least two battery cells at the same time. To ensure the welding quality, the welding device needs to press the bus bar and the pole column tightly through a pressing mechanism during welding. The existing pressing mechanism uses a pressing plate to press the pole columns and bus bars of all battery cells in the entire battery cell module at the same time. However, there may be a certain error in the upper surface height of the welding position of each battery cell, which makes it impossible to ensure the welding quality of each welding position by the method of uniformly pressing the pole columns and bus bars of all battery cells in the entire battery cell module. Content of the Utility Model

[0003] The purpose of this application is to provide a welding and pressing mechanism for battery cell modules to solve the problem that the pressing mechanism used for welding the pole columns and bus bars of battery cell modules in the prior art cannot ensure the welding quality of each welding position. In addition, another purpose of this application is to provide a welding device including the welding and pressing mechanism for battery cell modules.

[0004] To achieve this purpose, this application adopts the following technical solutions:

[0005] In the first aspect, a welding and pressing mechanism for battery cell modules includes a moving seat and n groups of pressing members, where:

[0006] Each group of pressing members includes m first pressing blocks. The first pressing blocks are movably installed on the moving seat through elastic components. Each first pressing block corresponds to a welding position of the battery cell module. Each welding position is provided with a pole column. The first pressing block is configured to press the pole column and the bus bar at the corresponding welding position. m and n are positive integers. A cavity is formed through each first pressing block, and m*n avoidance holes are formed on the moving seat. Each avoidance hole corresponds to the cavity of a first pressing block.

[0007] After the first pressing block presses the pole column and the bus bar at the corresponding welding position, the welding execution body of the welding mechanism sequentially passes through the corresponding group of avoidance holes and cavities to perform welding on the welding position pressed by the first pressing block.

[0008] The welding and pressing mechanism for the battery cell module proposed in this application is provided with m*n first pressing blocks, and each first pressing block corresponds to a welding position. During welding, the first pressing blocks press the pole columns and busbars at the corresponding welding positions. Compared with the existing method of using a single pressing plate to uniformly press the pole columns and busbars of all battery cells in the entire battery cell module, it can compensate for the errors in the upper surface heights of the welding positions of each battery cell, ensure the welding quality of all welding positions, and thus improve the overall welding quality of the battery cell module.

[0009] Optionally, the welding and pressing mechanism for the battery cell module further includes a height measuring component, which is configured to detect the height of the upper surface of the welding position before the welding mechanism performs welding.

[0010] The distance from the welding actuator of the welding mechanism to the welding position is calculated by the height measuring component, so as to adjust the welding actuator to the optimal welding height and ensure that each welding point can achieve the best welding quality.

[0011] Optionally, the height measuring component is installed on a moving seat. The height measuring component includes a driving member and at least one height measuring sensor. The fixed end of the driving member is installed on the moving seat, and the driving end of the driving member is connected to at least one height measuring sensor. The driving member is configured to drive at least one height measuring sensor to approach or move away from the avoidance hole; the driving member drives at least one height measuring sensor to move to each avoidance hole to detect the height of the pole column below each avoidance hole.

[0012] The driving member drives the height measuring sensor to move above the first pressing block to measure the actual height of the pole column. According to the detected height data, the upper welding actuator is moved to the optimal welding height, and the welding actuator welds the corresponding pole column position to ensure the welding quality.

[0013] Optionally, the height measuring sensor is slidably installed on the moving seat through a guiding component. The guiding component includes a linear guide rail and a slider. The height measuring sensor is installed on the sliding member. The linear guide rail is fixed on the moving seat, and the sliding member is slidably installed on the linear guide rail through the slider. The driving end of the driving member is connected to the sliding member.

[0014] The driving member drives the sliding member to move along the linear guide rail, thereby driving the height measuring sensor to translate relative to the moving seat, so as to conveniently adjust the position of the height measuring sensor to be vertically aligned with the pole column and improve the accuracy of the height measurement data.

[0015] Optionally, each set of pressing members further includes two second pressing blocks, and the two second pressing blocks are respectively located on both sides of the m first pressing blocks in the same group. The second pressing blocks are configured to press the adjacent welding positions or the welded positions while the first pressing blocks in the same group press the welding positions.

[0016] The second clamping block is used to clamp the adjacent areas to be welded or welded during welding to avoid affecting the areas being welded and not welded. Since the pole and the busbar need to be welded together during welding, and one busbar may simultaneously connect the poles of at least two battery cells, it is necessary to clamp the nearby areas to be welded during welding to avoid the situation where one end of the busbar is clamped and the other end is lifted up, resulting in poor welding quality at the lifted position.

[0017] Optionally, the second pressing block is movably mounted on the movable seat via an elastic component, and each second pressing block corresponds to a pole.

[0018] The elastic component enables the second pressing block to have a certain contact buffering capacity and pre-pressing function when applying pressure to the welding position, thereby avoiding damage to the welded area or movement of the area being welded and to be welded.

[0019] Optionally, the elastic component includes a guide member and an elastic member, the first end of the guide member is installed on the first clamping block and / or the second clamping block, the second end of the guide member is installed on the movable seat, the elastic member is sleeved on the guide member, the first end of the elastic member abuts the first clamping block or the second clamping block, and the second end of the elastic member abuts the movable seat.

[0020] The guide member is used to improve the position accuracy of the first pressing block or the second pressing block when it moves relative to the movable seat, and the elastic member provides contact buffering and reset capabilities for the first pressing block or the second pressing block.

[0021] Optionally, a dust removal assembly is provided on the first pressing block, and the dust removal assembly is configured to remove impurities and smoke generated during welding by the welding mechanism.

[0022] The dust removal component can timely remove pollutants generated by welding to reduce pollution to the surrounding environment and prevent pollutants from affecting the welding quality.

[0023] Optionally, the dust removal assembly includes a dust suction channel, a dust suction pipeline and an air suction device, the dust suction channel and the cavity are correspondingly arranged in the first compression block, the first end of the dust suction pipeline is connected to the dust suction channel, and the second end of the dust suction pipeline is connected to the air suction device.

[0024] By arranging a dust suction channel and a cavity in the first pressing block, and then connecting them with an external suction device through a dust suction pipeline, pollutants generated at the welding position of the first pressing block can be efficiently sucked away.

[0025] In a second aspect, a welding device includes a conveying mechanism, a positioning mechanism, the above-mentioned battery module welding clamping mechanism and a welding mechanism, wherein:

[0026] The conveying mechanism is configured to convey the battery cell module to be welded to the welding station or to remove the battery cell module welded on the welding station;

[0027] The positioning mechanism is configured to position each pole column of the battery cell module at the welding station;

[0028] The battery cell module welding and pressing mechanism is at least configured to press the pole columns and busbars at m*n welding positions on the battery cell module through m*n first pressing blocks before the welding mechanism performs welding;

[0029] The welding mechanism includes a transfer mechanism and a laser welding head. The laser welding head is installed at the driving end of the transfer mechanism. The transfer mechanism is configured to drive the laser welding head to move horizontally and vertically to perform welding on the welding positions pressed by the battery cell module welding and pressing mechanism.

[0030] The loading and unloading of the battery cell module is realized through the conveying mechanism. Each pole column of the battery cell module is accurately positioned through the positioning mechanism. Then, the battery cell module welding and pressing mechanism presses each welding point position in a small area respectively and detects the welding height one by one. Furthermore, it cooperates with the welding mechanism to complete the high-efficiency and high-quality welding operation, ensuring the overall welding quality of the battery cell module. Description of the Drawings

[0031] Figure 1 is a schematic three-dimensional structure diagram of the battery cell module welding and pressing mechanism provided by an embodiment of the present application;

[0032] Figure 2 is Figure 1 the top view of

[0033] Figure 3 is Figure 1 the bottom view of

[0034] Figure 4 is Figure 1 the front view of

[0035] Figure 5 is a schematic structure diagram of the first pressing block in the battery cell module welding and pressing mechanism provided by an embodiment of the present application;

[0036] Figure 6 is a schematic three-dimensional structure diagram of the welding device provided by an embodiment of the present application;

[0037] Figures 1 to 6 It includes the following reference numerals:

[0038] Moving seat 1, avoidance hole 11;

[0039] Pressing member 2, first pressing block 21, second pressing block 22;

[0040] Height measuring component 3, driving member 31, height measuring sensor 32;

[0041] Guiding component 4, linear guide rail 41, slider 42, sliding member 43;

[0042] Elastic component 5, guiding component 51, elastic member 52;

[0043] Dust removal component 6, dust suction channel 61, dust suction pipeline 62;

[0044] Cell module welding and pressing mechanism 100;

[0045] Conveying mechanism 200;

[0046] Positioning mechanism 300;

[0047] Welding mechanism 400. Detailed implementation manners

[0048] To make the above objects, features, and advantages of the present application more apparent and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0049] During the processing of the cell module, it is necessary to weld the pole columns of the cell module to the bus bar through a welding device. Usually, a bus bar collects the pole columns of at least two cells at the same time. To ensure the welding quality, it is necessary to press the bus bar and the pole columns tightly through a pressing mechanism during welding. The existing pressing method is to press the pole columns of the entire cell module simultaneously through a whole pressing plate, which may press 30 or 60 pole columns at the same time. However, there may be a certain error in the upper surface height of the welding position of each cell. Therefore, unified pressing cannot guarantee the welding quality of each welding position.

[0050] In response to this, the present application provides a cell module welding and pressing mechanism 100, which realizes the method of pressing each welding position in a small area and detecting the welding height one by one, so as to ensure the welding quality of each pole column. Please refer to Figures 1 to 5 As shown, the cell module welding and pressing mechanism 100 provided by the embodiment of the present application includes a moving seat 1 and n groups of pressing members 2, where:

[0051] Each group of pressing members 2 includes m first pressing blocks 21. The first pressing blocks 21 are movably installed on the moving seat 1 through an elastic component 5. Each first pressing block 21 corresponds to a welding position of the cell module. Each welding position is provided with a pole column. The first pressing block 21 is configured to press the pole column and the bus bar at the corresponding welding position. m and n are positive integers; a cavity is formed through each first pressing block 21, and m*n avoidance holes 11 are formed on the moving seat 1. Each avoidance hole 11 corresponds to the cavity of a first pressing block 21;

[0052] After the first pressing block 21 presses the pole column and the bus bar at the corresponding welding position, the welding actuator of the welding mechanism 400 sequentially passes through a corresponding set of avoidance holes 11 and cavities to perform welding on the welding position pressed by the first pressing block 21.

[0053] Thus, the cell module welding and pressing mechanism 100 proposed in this application, by setting m*n first pressing blocks 21, with each first pressing block 21 corresponding to a welding position, during welding, presses the pole column and the bus bar at the corresponding welding position through the first pressing block 21; compared with the existing method of using a single pressing plate to uniformly press the pole columns and bus bars of all cells in the entire cell module, it can compensate for the error in the upper surface height of the welding position of each cell, ensure the welding quality of all welding positions, and thus improve the overall welding quality of the cell module.

[0054] Among them, the welding mechanism 400 can adopt methods such as resistance contact welding and laser welding. When it is laser welding, the welding actuator is a laser welding head. The laser emitted by the laser welding head passes through the avoidance hole 11 and the cavity, and preferably, the first pressing block 21 is annular, and the cavity is the inner hole of the ring.

[0055] As an optional solution, the cell module welding and pressing mechanism 100 further includes a height measuring component 3, and the height measuring component 3 is configured to detect the height of the upper surface of the welding position before the welding mechanism 400 performs welding.

[0056] Thus, by calculating the distance from the welding actuator of the welding mechanism 400 to the welding position through the height measuring component 3, the welding actuator can be adjusted to the optimal welding height, ensuring that each solder joint can achieve the best welding quality.

[0057] Specifically, the height measuring component 3 is installed on the moving seat 1. The height measuring component 3 includes a driving member 31 and at least one height measuring sensor 32. The fixed end of the driving member 31 is installed on the moving seat 1, and the driving end of the driving member 31 is connected to at least one height measuring sensor 32. The driving member 31 is configured to drive at least one height measuring sensor 32 to approach or move away from the avoidance hole 11. In this embodiment, the driving member 31 is exemplified by a cylinder, and similar driving members can be applied, which are not limited here; the driving member 31 drives at least one height measuring sensor 32 to move to each avoidance hole 11 to detect the height of the pole column below each avoidance hole 11.

[0058] Thus, by driving the height measuring sensor 32 by the driving member 31 to move above the first pressing block 21, measuring the actual height of the pole column, and according to the detected height data, moving the upper welding actuator to the optimal welding height, the welding actuator welds the corresponding pole column position to ensure the welding quality.

[0059] Further, the height measuring sensor 32 is slidably mounted on the moving seat 1 through a guiding assembly 4. The guiding assembly 4 includes a linear guide rail 41 and a slider 42. The height measuring sensor 32 is mounted on a sliding member 43. The linear guide rail 41 is fixed on the moving seat 1. The sliding member 43 is slidably mounted on the linear guide rail 41 through the slider 42. The driving end of the driving member 31 is connected to the sliding member 43. Here, the sliding member 43 refers to a mounting seat that slides relative to the moving seat 1.

[0060] Thus, by driving the sliding member 43 to move along the linear guide rail 41 by the driving member 31, the height measuring sensor 32 is driven to translate relative to the moving seat 1, so as to conveniently adjust the position of the height measuring sensor 32 to be aligned with the pole post up and down, and improve the accuracy of the height measurement data.

[0061] As an alternative solution, each set of pressing members 2 further includes two second pressing blocks 22. The two second pressing blocks 22 are respectively located on both sides of the m first pressing blocks 21 in the same group. The second pressing blocks 22 are configured to press the adjacent to-be-welded position or the welded position while the first pressing blocks 21 in the same group press the welding position. Refer to Figure 3 , in this embodiment, four first pressing blocks 21 are taken as an example. One second pressing block 22 is respectively arranged on one side of the four first pressing blocks 21, and there are a total of four second pressing blocks 22.

[0062] Thus, during welding, the second pressing blocks 22 press the adjacent to-be-welded or welded areas, avoiding affecting the areas being welded and not welded. Since the pole post needs to be welded to the bus bar during welding, one bus bar may collect current from at least two cell pole posts at the same time. Therefore, it is necessary to press the adjacent to-be-welded area during welding to prevent the situation that one end of the bus bar is pressed and the other end warps up, resulting in poor welding quality at the warping position.

[0063] Further, the second pressing blocks 22 are movably mounted on the moving seat 1 through elastic components 5. Each second pressing block 22 corresponds to one pole post. The structures and shapes of the second pressing blocks 22 and the first pressing blocks 21 are the same. Elastic components 5 are also provided on the first pressing blocks 21. The structure of the first pressing blocks 21 is described in detail in this embodiment. For details, refer to Figure 5 .

[0064] Thus, through the elastic components 5, when the second pressing blocks 22 apply pressure to the welding position, they have a certain contact buffering ability and pre-pressing function, avoiding damaging the welded area or moving the areas being welded and to-be-welded.

[0065] Specifically, the elastic component 5 includes a guiding member 51 and an elastic member 52. The first end of the guiding member 51 is mounted on the first pressing block 21 and / or the second pressing block 22, and the second end of the guiding member 51 is mounted on the moving seat 1. The elastic member 52 is sleeved on the guiding member 51. The first end of the elastic member 52 abuts against the first pressing block 21 or the second pressing block 22, and the second end of the elastic member 52 abuts against the moving seat 1. In this embodiment, the guiding member 51 is exemplified by a guide rod, and the elastic member 52 is exemplified by a spring sleeved on the guide rod. Similar functional components can be applied, and no limitation is made here.

[0066] Thus, the guiding member 51 improves the position accuracy of the first pressing block 21 or the second pressing block 22 when moving relative to the moving seat 1, and then the elastic member 52 provides contact buffering and resetting capabilities for the first pressing block 21 or the second pressing block 22.

[0067] As an alternative solution, a dust removal component 6 is provided on the first pressing block 21. The dust removal component 6 is configured to remove impurities and fumes generated during the welding of the welding mechanism 400.

[0068] Thus, the dust removal component 6 timely sucks the pollutants generated by welding, reducing environmental pollution around, so as to prevent the pollutants from affecting the welding quality.

[0069] Furthermore, the dust removal component 6 includes a dust suction channel 61, a dust suction pipeline 62 and a suction device. The dust suction channel 61 is correspondingly arranged in the first pressing block 21 in correspondence with the cavity. The first end of the dust suction pipeline 62 is communicated with the dust suction channel 61, and the second end of the dust suction pipeline 62 is communicated with the suction device.

[0070] Thus, by providing the dust suction channel 61 and the cavity in the first pressing block 21, and then communicating with an external suction device through the dust suction pipeline 62, the pollutants generated at the welding position of the first pressing block 21 are efficiently sucked away.

[0071] It should be noted that among the above various alternative embodiments, they can be combined in any combination manner, and the combined embodiments all fall within the protection scope of this application.

[0072] The specific working process of the cell module welding and pressing mechanism 100 is as follows:

[0073] (1) The moving seat 1 moves to align each of the above first pressing blocks 21 with each welding position of the cell module, and each avoidance hole 11 of the moving seat 1 corresponds to the cavity of each first pressing block 21;

[0074] (2) Each first pressing block 21 presses the pole column and the bus bar at the corresponding welding position respectively; meanwhile, the second pressing block 22 presses the adjacent areas to be welded or already welded.

[0075] (3) The height measuring component 3 detects the height of the upper surface of each welding position, calculates the optimal welding height of the welding mechanism 400 at each welding position, so as to achieve the best welding quality;

[0076] (4) The dust removal component 6 removes impurities and fumes generated during the welding of the welding mechanism 400.

[0077] The welding and pressing mechanism of the battery cell module provided by the embodiment of the present application has the following advantages:

[0078] 1) By adopting the pressing method of using one pressing block to press one welding position, it can make up for the error in the height of the upper surface of the welding position to be welded for each battery cell, ensure the welding quality of all welding positions, and thus improve the overall welding quality of the battery cell module;

[0079] 2) A height measuring component is provided, which can control the welding actuator to move to the optimal welding height according to the height of the upper surface of the welding position, further improving the welding quality of the battery cell module;

[0080] 3) A second pressing block is provided. During welding, the second pressing block presses the nearby welding area to be welded, so as to avoid the situation that one end of the bus bar is pressed and the other end warps up, ensuring the welding quality of the battery cell module;

[0081] 4) A dust removal component is provided, which can timely remove impurities and fumes generated during the welding of the welding mechanism, ensuring a clean working environment.

[0082] On this basis, for details, see Figure 6 , the embodiment of the present application provides a welding device, which includes a conveying mechanism 200, a positioning mechanism 300, the above-mentioned welding and pressing mechanism 100 of the battery cell module and a welding mechanism 400, wherein:

[0083] The conveying mechanism 200 is configured to convey the battery cell module to be welded to the welding station or remove the battery cell module welded at the welding station;

[0084] The positioning mechanism 300 is configured to position each pole column of the battery cell module at the welding station;

[0085] The welding and pressing mechanism 100 of the battery cell module is at least configured to press the pole columns and bus bars at m*n welding positions on the battery cell module through m*n first pressing blocks 21 before the welding mechanism 400 welds;

[0086] The welding mechanism 400 includes a transfer mechanism and a laser welding head. The laser welding head is installed at the driving end of the transfer mechanism. The transfer mechanism is configured to drive the laser welding head to move horizontally and vertically to weld the welding positions pressed by the welding and pressing mechanism 100 of the battery cell module.

[0087] Thus, the feeding and discharging of the battery cell module are realized by the conveying mechanism 200. Each pole column of the battery cell module is accurately positioned by the positioning mechanism 300. Then, the battery cell module welding and pressing mechanism 100 presses each welding point to be welded in a small area respectively and detects the welding height one by one, and then cooperates with the welding mechanism 400 to complete the welding action with high efficiency and high quality, ensuring the overall welding quality of the battery cell module.

[0088] Among them, the positioning method is not limited. It can be positioned by taking pictures one by one, or calculated through the pre-set position parameters of the battery module. In the figure, the camera is installed on a lifting and translation module, and the welding points are positioned by taking pictures.

[0089] Among them, the welding method is not limited. In the figure, the method is laser welding. The welding mechanism 400 also includes a blowing component, which is used to blow away the impurities and gases generated during laser welding, so that the dust removal component 6 on the battery cell module welding and pressing mechanism 100 can suck them away.

[0090] The specific working process of this welding device is as follows:

[0091] (1) The conveying mechanism 200 conveys the battery cell module to be welded to the welding station;

[0092] (2) The positioning mechanism 300 positions the positions of each pole column on the battery cell module;

[0093] (3) The battery cell module welding and pressing mechanism 100 presses the pole column and the bus bar at each welding position on the battery cell module, and calculates the optimal welding height at each welding position;

[0094] (4) The welding mechanism 400 adjusts to the target welding height at each welding position to complete the welding of the pole column and the bus bar.

[0095] The above embodiments only illustrate the basic principles and characteristics of the present application. The present application is not limited by the above examples. Without departing from the spirit and scope of the present application, there are various changes and modifications to the present application, and these changes and modifications all fall within the scope of the present application claimed. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A battery cell module welding clamping mechanism, characterized in that: The battery module welding clamping mechanism comprises a movable seat and n groups of clamping parts, wherein: Each group of the clamping members includes m first clamping blocks, which are movably mounted on the movable seat through an elastic component, each of which corresponds to a welding position of the battery cell module, and is configured to clamp the pole and busbar corresponding to the welding position, and m and n are positive integers; each of the first clamping blocks is provided with a cavity, and the movable seat is provided with m*n avoidance holes, and each of the avoidance holes corresponds to a cavity of the first clamping block; After the first pressing block presses the pole and the busbar at the corresponding welding position, the welding actuator of the welding mechanism passes through a corresponding set of avoidance holes and cavities in sequence to perform welding on the welding position pressed by the first pressing block.

2. The battery module welding and clamping mechanism according to claim 1, characterized in that: The battery module welding clamping mechanism also includes a height measuring component, which is configured to detect the height of the upper surface of the welding position before welding by the welding mechanism.

3. The battery module welding and clamping mechanism according to claim 2, characterized in that: The height measuring assembly is mounted on the moving seat, and the height measuring assembly includes a driving member and at least one height measuring sensor. The fixed end of the driving member is mounted on the moving seat, and the driving end of the driving member is connected to the at least one height measuring sensor. The driving member is configured to drive the at least one height measuring sensor to approach or move away from the avoidance hole. The driving member drives the at least one height measuring sensor to move to each of the avoidance holes to detect the height of the pole below each of the avoidance holes.

4. The battery module welding and clamping mechanism according to claim 3, characterized in that: The height measuring sensor is slidably mounted on the moving seat via a guide assembly, the guide assembly comprises a linear guide rail and a slider, the height measuring sensor is mounted on a sliding member, the linear guide rail is fixed on the moving seat, the sliding member is slidably mounted on the linear guide rail via the slider, and the driving end of the driving member is connected to the sliding member.

5. The battery cell module welding and clamping mechanism according to claim 1, characterized in that: Each group of the clamping parts also includes two second clamping blocks, which are respectively located on both sides of the m first clamping blocks in the same group. The second clamping blocks are configured to clamp adjacent positions to be welded or welded positions while the first clamping blocks in the same group clamp the welding positions.

6. The battery cell module welding clamping mechanism according to claim 5, characterized in that: The second pressing block is movably mounted on the movable seat via an elastic component, and each of the second pressing blocks corresponds to a pole.

7. The battery module welding and clamping mechanism according to claim 6, characterized in that: The elastic component includes a guide member and an elastic member, the first end of the guide member is installed on the first clamping block and / or the second clamping block, the second end of the guide member is installed on the movable seat, the elastic member is sleeved on the guide member, the first end of the elastic member abuts the first clamping block or the second clamping block, and the second end of the elastic member abuts the movable seat.

8. The battery module welding and clamping mechanism according to claim 1, characterized in that: The first pressing block is provided with a dust removal assembly, and the dust removal assembly is configured to remove impurities and smoke generated during welding by the welding mechanism.

9. The battery module welding and clamping mechanism according to claim 8, characterized in that: The dust removal assembly includes a dust suction channel, a dust suction pipeline and an air suction device. The dust suction channel and the cavity are correspondingly arranged in the first compression block. The first end of the dust suction pipeline is connected to the dust suction channel, and the second end of the dust suction pipeline is connected to the air suction device.

10. A welding device, characterized in that: The welding device comprises a conveying mechanism, a positioning mechanism, a battery cell module welding clamping mechanism and a welding mechanism as claimed in any one of claims 1 to 9, wherein: The conveying mechanism is configured to convey the battery cell module to be welded to the welding station or to remove the battery cell module welded on the welding station; The positioning mechanism is configured to position each pole of the battery cell module at the welding station; The battery module welding clamping mechanism is at least configured to clamp the poles and busbars at m*n welding positions on the battery module by m*n first clamping blocks before welding by the welding mechanism; The welding mechanism includes a transfer mechanism and a laser welding head, wherein the laser welding head is installed at the driving end of the transfer mechanism, and the transfer mechanism is configured to drive the laser welding head to move horizontally and vertically so as to perform welding on the welding position clamped by the welding clamping mechanism of the battery cell module.

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