Battery cell tab welding device

Abstract

The utility model discloses a kind of electric core tab welding devices, including substrate and pressing mechanism, the substrate is used to place electric core;The pressing mechanism includes first pressing block and first floating connection component, the first pressing block is set to the top of the substrate, the first pressing block is floatingly connected with the substrate by the first floating connection component, and can be relative to the substrate along the height direction of the substrate floating, electric core placement gap is arranged between the first pressing block and the substrate, and welding avoidance through-hole, which is communicated with the electric core placement gap, is arranged on the first pressing block.This application solves the problem that the pressing structure and the welding surface of the electric core tab exist gap when the electric core tab welding device welds the electric core tab, which can easily cause poor welding.

Description

Technical Field

[0001] This utility model relates to the field of battery cell welding technology, and more specifically, to a battery cell tab welding device. Background Technology

[0002] Currently, the clamping structure of the welding device for battery cell tabs is mainly a rigid structure. When the flatness of the battery cell tab is low or the thickness of the battery cell tab is different, the rigid clamping structure is difficult to completely clamp the welding surface of the battery cell tab. As a result, the welding surface of the battery cell tab is not compacted after clamping, resulting in gaps on the welding surface of the battery cell tab. This further leads to poor welding of the battery cell tab, affecting the welding quality and production efficiency of the battery cell. Utility Model Content

[0003] The main objective of this invention is to provide a battery cell tab welding device, which at least solves the problem that when existing battery cell tab welding devices weld battery cell tabs, there is a gap between the clamping structure and the welding surface of the battery cell tab, which easily leads to poor welding.

[0004] This utility model provides a battery cell tab welding device, comprising: A substrate for placing battery cells; A clamping mechanism is provided, comprising a first clamping block and a first floating connection assembly. The first clamping block is disposed on the top of the substrate and is floatingly connected to the substrate through the first floating connection assembly. It can float relative to the substrate along the height direction of the substrate. A cell placement gap is provided between the first clamping block and the substrate. A welding clearance through hole communicating with the cell placement gap is provided on the first clamping block.

[0005] Furthermore, the pressing mechanism also includes a second pressing block and a second floating connection assembly. The second pressing block is disposed within the cell placement gap. The second pressing block is floatingly connected to the first pressing block through the second floating connection assembly and can float relative to the first pressing block along the height direction of the substrate.

[0006] Furthermore, the second pressure block includes multiple blocks, which are arranged sequentially along the length of the first pressure block. Any one of the multiple second pressure blocks is floatingly connected to the first pressure block through at least two first floating connection components. Each second pressure block is provided with an avoidance opening corresponding to the welding avoidance through hole.

[0007] Furthermore, the second floating connection assembly includes a second guide member and a second elastic member. The first pressure block is provided with a second guide through hole. The second guide member passes through the second guide through hole and is fixedly connected to the second pressure block. The top end of the second guide member is provided with a second limiting part, which is located at the top of the first pressure block. The second elastic member extends along the height direction of the substrate, and both ends of the second elastic member abut against the first pressure block and the second pressure block.

[0008] Furthermore, the second floating connection assembly further includes a second oil-free bushing, which is fixedly connected to the second guide through hole, and the second guide member passes through the second oil-free bushing; and / or, The second elastic element includes a second floating spring, which is sleeved on the second guide element, and the two ends of the second floating spring abut against the first pressure block and the second pressure block.

[0009] Furthermore, the first floating connection assembly includes a first guide member and a first elastic member. A first guide through hole is provided on the substrate. The first guide member passes through the first guide through hole and is fixedly connected to the first pressure block. A first limiting part is provided at the bottom end of the first guide member. The first elastic member extends along the height direction of the substrate. Both ends of the first elastic member abut against the substrate and the first limiting part.

[0010] Furthermore, the first floating connection assembly includes a first oil-free bushing, the first oil-free bushing being fixedly connected to the first guide through hole, and the first guide member passing through the first oil-free bushing; and / or, The first elastic element includes a first floating spring, which is sleeved on the first guide element, and the two ends of the first floating spring abut against the substrate and the first limiting portion.

[0011] Furthermore, the clamping mechanism also includes a driving component, which is drivenly connected to the first pressing block, and the driving component is configured to drive the first pressing block to move along the height direction of the substrate under the action of an external force.

[0012] Furthermore, the driving assembly includes an elbow clamp, which is fixedly connected to the substrate. The elbow clamp includes a handle, a linkage structure, and a lifting rod. The handle is driven to the lifting rod through the linkage structure and can drive the lifting rod to move along the height direction of the substrate under the action of external force. The top end of the lifting rod abuts against the first pressure block.

[0013] Furthermore, it also includes a cell support assembly, which includes a first support block and a second support block. The first support block is at least partially disposed between the first pressing block and the substrate. Along the length direction of the first pressing block, the two ends of the first support block are provided with first limiting protrusions extending along the height direction of the substrate. Along the length direction of the first pressing block, a plurality of positioning pins are spaced apart on the top of the first support block. The second support block is disposed at the end of the substrate away from the first support block, and the second support block is provided with a second limiting protrusion extending along the height direction of the substrate.

[0014] In this invention, the first pressure block of the battery cell tab welding device is floatingly connected to the substrate via a first floating connection assembly. It can float along the height of the substrate. When the battery cell tab has low flatness or a certain thickness difference, the first pressure block can conform to the surface of the battery cell tab and press it firmly, avoiding the problem of localized gaps in the welding surface caused by a rigid pressing structure. This reduces the welding defect rate and improves the welding quality of the battery cell tab and the overall production efficiency of the battery cell. The welding avoidance through-holes provided on the first pressure block ensure that the battery cell tab is stably pressed while preventing the welding surface from being blocked by the first pressure block, thus preventing effective welding. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural schematic diagram of the battery cell tab welding device disclosed in an embodiment of the present utility model; Figure 2 This is a top view of the battery cell tab welding device disclosed in an embodiment of this utility model; Figure 3 This is a front view of the battery cell tab welding device disclosed in an embodiment of this utility model; Figure 4 This is a side view of the battery cell tab welding device disclosed in an embodiment of the present utility model; Figure 5 This is a schematic diagram showing the state switching of the battery cell tab welding device disclosed in an embodiment of this utility model; Figure 6 This is an exploded structural diagram of the battery cell tab welding device disclosed in an embodiment of the present utility model.

[0016] The above figures include the following reference numerals: 10. Substrate; 11. Cell placement gap; 12. First guide through hole; 13. Drive clearance opening; 20. First pressure block; 21. Welding clearance through hole; 22. Second guide through hole; 30. First floating connection assembly; 31. First guide member; 311. First limiting part; 3111. Spring washer; 3112. Bolt; 32. First elastic member; 321. First floating spring; 33. First oil-free bushing; 40. Second pressure block; 41. Clearance opening 50. Second floating connection assembly; 51. Second guide member; 511. Second limiting part; 52. Second elastic member; 521. Second floating spring; 53. Second oil-free bushing; 60. Elbow clamp; 61. Handle; 62. Linkage structure; 63. Lifting rod; 64. Fixed seat; 70. Battery cell support assembly; 71. First support block; 711. First limiting protrusion; 712. Positioning pin; 72. Second support block; 721. Second limiting protrusion. Detailed Implementation

[0017] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0020] In related technologies, the clamping structure of welding devices for pouch cell tabs is mainly a rigid structure. This makes it difficult to accommodate variations in clamping thickness caused by factors such as module structure, inconsistent injection molding thickness, poor tab flatness, and differences in the materials being welded. Consequently, it is difficult to completely clamp the welding surface of the cell tabs, resulting in gaps on the welding surface after clamping. This easily leads to poor welding of the cell tabs, affecting the welding quality and cell production efficiency. Therefore, this application provides a cell tab welding device. The first clamping block of the device's clamping structure is floatingly connected to a substrate for placing the cell via a first floating connection component. When the cell is placed in the cell placement gap between the first clamping block and the substrate, the first clamping block, due to its floating relative to the substrate, can adapt to the thickness of the cell tab, ensuring that all positions on the welding surface of the cell tab are clamped, thus improving the welding quality and cell production efficiency.

[0021] See Figures 1 to 6 As shown, according to an embodiment of this application, a battery cell tab welding apparatus is provided, including a substrate 10 and a clamping structure.

[0022] The substrate 10 is used to place the battery cell; the pressing mechanism includes a first pressing block 20 and a first floating connection assembly 30. The first pressing block 20 is disposed on the top of the substrate 10 and is floatingly connected to the substrate 10 through the first floating connection assembly 30. It can float relative to the substrate 10 along the height direction of the substrate 10. A battery cell placement gap 11 is provided between the first pressing block 20 and the substrate 10. A welding avoidance through hole 21 communicating with the battery cell placement gap 11 is provided on the first pressing block 20.

[0023] Understandably, when welding the battery cell tabs using the battery cell tab welding device provided in this embodiment, the battery cell is placed on top of the substrate 10, such as... Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6The gray dashed line structure represents the cell structure. The cell tabs are located within the cell placement gap 11 between the first pressing block 20 and the substrate 10. The first pressing block 20 presses the cell tabs under the action of the first floating connection assembly 30. At this time, external welding equipment, such as laser welding equipment or ultrasonic welding equipment, is used to weld the cell tabs through the welding clearance through-hole 21 on the first pressing block 20. Because the first pressing block 20 is floating, it can adapt to the thickness of the welding surface of the cell tab, improving the welding effect of the cell tab. When applied to working conditions with similar block (cell) structures and the same welding area, it can be compatible with cell tab welding within a certain cell thickness range. The cooperation between the first pressing block 20 and the first floating connection assembly 30 can be compatible with pressing welding conditions that affect the pressing thickness due to various factors such as module structure, poor thickness consistency of injection molded parts, poor flatness of the tabs, and differences in the materials being welded, thus improving the stability and reliability of cell tab welding and increasing the production efficiency of the cells.

[0024] Furthermore, the clamping mechanism also includes a second pressing block 40 and a second floating connection assembly 50. The second pressing block 40 is disposed in the cell placement gap 11. The second pressing block 40 is floatingly connected to the first pressing block 20 through the second floating connection assembly 50, and can float relative to the first pressing block 20 along the height direction of the substrate 10.

[0025] In other words, when the first pressing block 20 floats relative to the substrate 10 under the action of the first floating connection component 30, the second pressing block 40 between the first pressing block 20 and the substrate 10 floats relative to the first pressing block 20 under the action of the second floating connection component 50. That is, the second pressing block 40 directly presses against the surface of the battery cell tab. The floating pressing of the battery cell tab is the result of the combined action of the first pressing block 20 and the second pressing block 40. In this way, the second pressing block 40 can make more precise fit and compensation for the unevenness of the surface of the battery cell tab on the basis of the floating of the first pressing block 20, avoiding the situation of insufficient or excessive local pressing force caused by the overall rigidity of the first pressing block 20, thus ensuring the welding effect of the battery cell tab.

[0026] Furthermore, the second pressure block 40 includes multiple second pressure blocks 40 arranged sequentially along the length direction of the first pressure block 20. Any one of the multiple second pressure blocks 40 is floatingly connected to the first pressure block 20 through at least two first floating connection components 30. Each second pressure block 40 is provided with a relief opening 41 corresponding to the welding relief through hole 21.

[0027] In this embodiment, the second pressing block 40 is set to multiple, for example... Figure 6There are two second pressure blocks 40, distributed along the length of the first pressure block 20. These blocks allow for zoned adaptive clamping to address thickness differences in different parts of the battery cell tab. For example, if the battery cell tab experiences localized warping or uneven thickness due to processing, the second pressure block 40 in that area can independently float and adjust, ensuring uniform clamping force across different areas. This avoids localized clamping failure caused by the overall rigidity of a single pressure block. Uniform and effective clamping improves the welding effect of the battery cell tab and prevents welding failure and detachment. The second pressure block 40 has an abutment opening 41 that mates with the welding abutment through-hole 21 on the first pressure block 20. For instance, a laser emitted from a laser welding device can pass through the welding abutment through-hole 21 and the abutment opening 41 to reach the welding surface of the battery cell tab, allowing unobstructed welding and ensuring a good welding effect.

[0028] like Figure 6 As shown, the second floating connection assembly 50 includes a second guide member 51 and a second elastic member 52. A second guide through hole 22 is provided on the first pressure block 20. The second guide member 51 passes through the second guide through hole 22 and is fixedly connected to the second pressure block 40. A second limiting part 511 is provided at the top of the second guide member 51. The second limiting part 511 is located at the top of the first pressure block 20. The second elastic member 52 extends along the height direction of the substrate 10. Both ends of the second elastic member 52 abut against the first pressure block 20 and the second pressure block 40.

[0029] In this embodiment, when the first pressing block 20 floats downward along the height of the substrate 10, it will drive the second pressing block 40 to move downward along with the first pressing block 20 until it abuts against the battery cell tab. If the first pressing block 20 continues to float downward, since the two ends of the second elastic member 52 abut against the first pressing block 20 and the second pressing block 40, the second pressing block 40 will squeeze the second elastic member 52, causing the second elastic member 52 to undergo elastic deformation. The first pressing block 20 will move downward relative to the second guide member 51, that is, there is relative movement between the second guide member 51 and the second guide through hole 22. When neither the first pressing block 20 nor the second pressing block 40 floats anymore, the second pressing block 40 can press the battery cell tab in the optimal state to ensure the welding effect when welding the battery cell tab. After receiving pressure from the first pressure block 20, the second pressure block 40 drives the second guide member 51 to slide upward along the second guide through hole 22, while simultaneously compressing the second elastic member 52. During this process, the second guide through hole 22 restricts the movement direction of the second guide member 51, ensuring that the second pressure block 40 floats only along the height direction of the substrate 10, avoiding lateral offset that could lead to pressure deviation. During the welding process of the battery cell tabs, if there are local unevenness on the surface of the battery cell tabs, the floating amount of the second pressure block 40 corresponding to the thicker area will be greater under the action of the first pressure block 20 and the second elastic member 52. By increasing the clamping force in that area, the clamping effect of the welding surface of the battery cell tab in that area is ensured. When both the first pressure block 20 and the second pressure block 40 float upward along the height direction of the substrate 10, the second limiting part 511 at the top of the second guide member 51 can prevent the first pressure block 20 from disengaging from the second guide member 51, ensuring the structural stability between the second pressure block 40 and the second floating connection assembly 50.

[0030] Preferably, such as Figure 6 As shown, the second floating connection assembly 50 also includes a second oil-free bushing 53, which is fixedly connected to the second guide through hole 22. The second guide member 51 passes through the second oil-free bushing 53. An oil-free bushing is a mechanical component that can achieve low-friction sliding without the need for additional lubrication. In this embodiment, by setting the second oil-free bushing 53 between the second guide member 51 and the second guide through hole 22, the direct contact wear between the second guide member 51 and the second guide through hole 22 can be reduced, extending the service life of the component and improving the floating effect. At the same time, the second oil-free bushing 53 can compensate for the assembly gap between the second guide through hole 22 and the second guide member 51, limit the radial sway of the second guide member 51, and ensure that the second pressure block 40 floats stably only along the height direction of the substrate 10, avoiding uneven distribution of clamping force or deviation between the welding avoidance port 41 and the welding position caused by lateral offset. Especially in high-frequency reciprocating floating scenarios, it can significantly improve the long-term stability of the floating structure.

[0031] Preferably, such as Figure 6As shown, the second elastic element 52 includes a second floating spring 521, which is sleeved on the second guide element 51. Both ends of the second floating spring 521 abut against the first pressure block 20 and the second pressure block 40. By configuring the second elastic element 52 as a spring structure sleeved on the second guide element 51, on the one hand, the elastic force of the second floating spring 521 can be accurately transmitted along the axial direction of the second guide element 51, ensuring that the force direction of the second pressure block 40 is consistent with the floating direction, thus avoiding tilting of the second pressure block 40 due to off-center loading; on the other hand, the second guide element 51 can form a radial constraint on the second floating spring 521, preventing the second floating spring 521 from bending or twisting during compression or extension, ensuring stable elastic force output.

[0032] Preferably, the second guide member 51 includes a shoulder screw, and the second limiting part 511 is configured as the head of the shoulder screw. The screw of the shoulder screw (shoulder screw) has a guiding function, and the head of the shoulder screw has a limiting function, so guiding and limiting can be achieved without the need for additional design of independent guide posts and limiting structures. Figure 6 As shown, the plug screw passes through the second guide hole 22 and forms a second limiting part 511 through the screw head, which simplifies the number of parts and the assembly process, and reduces production costs. At the same time, the head of the plug screw and the screw rod are integrally formed, which has high strength and stable dimensional accuracy, ensuring the reliability of the limiting action. In addition, the plug screw can be threadedly connected to the second pressure block 40, which improves the structural stability between the second pressure block 40 and the second floating connection assembly 50.

[0033] like Figure 6 As shown, the first floating connection assembly 30 includes a first guide member 31 and a first elastic member 32. A first guide through hole 12 is provided on the substrate 10. The first guide member 31 passes through the first guide through hole 12 and is fixedly connected to the first pressure block 20. A first limiting part 311 is provided at the bottom end of the first guide member 31. The first elastic member 32 extends along the height direction of the substrate 10. Both ends of the first elastic member 32 abut against the substrate 10 and the first limiting part 311.

[0034] In this embodiment, the first guide member 31, passing through the first guide hole 12 of the substrate 10, restricts the movement direction of the first pressing block 20, ensuring that it floats stably only along the height direction of the substrate 10, thus ensuring that the battery cell tabs remain in a stable pressed state during the welding process. The first elastic member 32 abuts against the substrate 10 and the first limiting part 311 at both ends, and its elastic force is transmitted upwards to the first pressing block 20 through the first guide member 31, providing a continuous and adjustable basic pressing force for the first pressing block 20. When there is a macroscopic difference in the thickness of the battery cell tabs, the first elastic member 32 can automatically compensate through its own elastic deformation, enabling a better balance between the first pressing block 20, the first floating connection assembly 30, the second pressing block 40, and the second floating connection assembly 50, ensuring the pressing effect on the battery cell tabs. The first limiting part 311 at the bottom of the first guide member 31 prevents the first elastic member 32 from detaching from the first guide member 31, ensuring that the first floating connection assembly 30 can effectively support the first pressing block 20.

[0035] Preferably, such as Figure 6 As shown, the first floating connection assembly 30 includes a first oil-free bushing 33, which is fixedly connected to the first guide through hole 12. The first guide member 31 passes through the first oil-free bushing 33. The first oil-free bushing 33 can reduce the direct wear between the first guide member 31 and the substrate 10, improve the guiding accuracy, limit the radial sway of the first guide member 31, ensure the stable floating of the first pressure block 20, eliminate the need for additional lubrication, and avoid contaminating the battery cell.

[0036] Preferably, such as Figure 6 As shown, the first elastic member 32 includes a first floating spring 321, which is sleeved on the first guide member 31. The two ends of the first floating spring 321 abut against the base plate 10 and the first limiting part 311. The first floating spring 321, sleeved on the first guide member 31, can ensure that the elastic force is transmitted along the axial direction (the length direction of the first elastic member 32), prevent the first floating spring 321 from bending to the side, and can stably output the clamping force, thereby improving the floating effect of the first pressure block 20.

[0037] Preferably, the first limiting part 311 includes a spring washer 3111 and a bolt 3112. The bolt 3112 passes through the spring washer 3111 and is threadedly connected to the bottom end of the first guide member 31. The width of the spring washer 3111 is greater than the inner diameter of the first floating spring 321. Thus, when the first floating spring 321 is compressed along the length of the first guide member 31, the spring washer 3111 can limit the bottom of the first floating spring 321 to ensure that the first floating spring 321 can be compressed and rebounded, thus ensuring the floating effect of the first pressure block 20.

[0038] Furthermore, the clamping mechanism also includes a drive assembly, which is drivenly connected to the first pressure block 20. The drive assembly is configured to drive the first pressure block 20 to move along the height direction of the substrate 10 under the action of an external force. In this way, the drive assembly can provide an active and controllable power source for the clamping mechanism by driving the first pressure block 20 to move along the height direction of the substrate 10 through an external force. The drive assembly can drive the first pressure block 20 and the second pressure block 40 to move away from the battery cell tab, so that the battery cell placement gap 11 is greater than the thickness of the battery cell tab, which facilitates the placement or removal of the battery cell tab and improves the welding efficiency of the battery cell tab.

[0039] Furthermore, the drive assembly includes an elbow clamp 60, which is fixedly connected to the substrate 10. The elbow clamp 60 includes a handle 61, a linkage structure 62, and a lifting rod 63. The handle 61 is driven to connect to the lifting rod 63 through the linkage structure 62 and can drive the lifting rod 63 to move along the height direction of the substrate 10 under the action of external force. The top end of the lifting rod 63 abuts against the first pressure block 20.

[0040] In this embodiment, the handle of the elbow clamp 60 can drive the lifting rod 63 to move along the height direction of the substrate under the action of the linkage structure 62. Since the top of the lifting rod 63 abuts against the first pressure block 20, when the lifting rod 63 is controlled to move upward by the handle 61, the lifting rod 63 will push the first pressure block 20 upward, so that the first pressure block 20 moves upward and compresses the first floating spring 321 under the action between the first limiting part 311 and the substrate 10. The second floating spring 521 gradually returns from the compressed state to the free state. When the lifting rod 63 rises to the maximum position, the compression of the first floating spring 321 reaches the maximum. At this time, the cell placement gap 11 between the second pressure block 40 and the substrate 10 is greater than the thickness of the cell tab, which facilitates the placement or removal of the cell tab and improves the welding efficiency of the cell tab.

[0041] like Figure 5 As shown in the figure, the red dotted line represents the state in which the handle 61 of the elbow clamp 60 drives the lifting rod 63 from the lowest position to the highest position. It can be seen that when the handle 61 is moved downward from the highest point by external force, the lifting rod 63 is moved upward through the linkage structure 62, pushing the first pressure block 20 to move upward to the highest point. The first floating spring 321 is compressed, and the second pressure block 40 leaves the substrate 10 or the surface of the battery cell tab. At this time, the battery cell tab can be placed or removed. For example, after placing the battery cell tab in the battery cell placement gap 11, the handle 61 is moved downward by external force to drive the lifting rod 63. Under the rebound action of the first floating spring 321, the first pressure block 20 moves downward, and the second pressure block 40 is pressed against the surface of the battery cell tab under the action of the first pressure block 20. It continues to press against the surface of the battery cell tab under the action of the second floating spring 521, thus completing the pressing of the battery cell tab.

[0042] Furthermore, such as Figure 5 and Figure 6 As shown, the elbow clamp 60 also includes a fixing base 64. A drive clearance opening 13 is provided on the side end of the base plate 10. The fixing base 64 is located within the drive clearance opening 13 of the base plate 10 and is fixedly connected to the base plate 10. The connecting rod structure 62 is disposed on the fixing base 64. In this way, it can be ensured that the handle 61 can drive the lifting rod 63 to move relative to the base plate 10 along the height direction of the base plate 10 through the connecting rod structure 62.

[0043] Optionally, the fixing method between the fixing base 64 and the base plate 10 is at least one of screwing, snap-fitting and welding.

[0044] Furthermore, the battery cell tab welding device of this embodiment also includes a battery cell support assembly 70. The battery cell support assembly 70 includes a first support block 71 and a second support block 72. The first support block 71 is at least partially disposed between the first pressing block 20 and the substrate 10. Along the length direction of the first pressing block 20, the two ends of the first support block 71 are provided with first limiting protrusions 711 extending along the height direction of the substrate 10. Along the length direction of the first pressing block 20, the top of the first support block 71 is provided with a plurality of positioning pins 712 spaced apart. The second support block 72 is disposed at the end of the substrate 10 away from the first support block 71, and the second support block 72 is provided with a second limiting protrusion 721 extending along the height direction of the substrate 10.

[0045] In this embodiment, the cell support assembly 70, through the cooperation of the first support block 71 and the second support block 72, forms a precise positioning and stable support for the cell. The first limiting protrusion 711 of the first support block 71 can limit the lateral displacement of the cell, and the multiple positioning pins 712 on the first support block 71 can achieve precise positioning of the cell tabs. During use, the cell tabs are pressed against the positioning pins to ensure the distribution of the welding surface of the cell tabs in the welding area, ensuring that the welding position will not deviate and improving the welding effect. The second limiting protrusion 721 of the second support block 72 cooperates with the first support block 71 to form a longitudinal limit on the cell from another direction, preventing the cell from shifting or even detaching from the substrate due to external force during the welding process. The configuration of the cell support assembly 70 provides a stable support reference for the cell, and in conjunction with the floating clamping of the clamping mechanism, it further improves the positional accuracy and stability of the cell tabs during welding, thereby improving the welding effect of the cell tabs.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0048] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery cell tab welding device, characterized in that, include: A substrate (10) is used to place a battery cell; The clamping mechanism includes a first clamping block (20) and a first floating connection assembly (30). The first clamping block (20) is disposed on the top of the substrate (10). The first clamping block (20) is floatingly connected to the substrate (10) through the first floating connection assembly (30) and can float relative to the substrate (10) along the height direction of the substrate (10). A cell placement gap (11) is provided between the first clamping block (20) and the substrate (10). A welding clearance through hole (21) communicating with the cell placement gap (11) is provided on the first clamping block (20).

2. The battery cell tab welding device according to claim 1, characterized in that, The pressing mechanism further includes a second pressing block (40) and a second floating connection assembly (50). The second pressing block (40) is disposed in the cell placement gap (11). The second pressing block (40) is floatingly connected to the first pressing block (20) through the second floating connection assembly (50) and can float relative to the first pressing block (20) along the height direction of the substrate (10).

3. The battery cell tab welding device according to claim 2, characterized in that, The second pressure block (40) includes multiple second pressure blocks (40) arranged sequentially along the length direction of the first pressure block (20). Any one of the multiple second pressure blocks (40) is floatingly connected to the first pressure block (20) through at least two first floating connection components (30). Each second pressure block (40) is provided with a relief opening (41) corresponding to the welding relief through hole (21).

4. The battery cell tab welding device according to claim 2, characterized in that, The second floating connection assembly (50) includes a second guide (51) and a second elastic member (52). The first pressure block (20) is provided with a second guide through hole (22). The second guide (51) passes through the second guide through hole (22) and is fixedly connected to the second pressure block (40). The top end of the second guide (51) is provided with a second limiting part (511). The second limiting part (511) is located at the top of the first pressure block (20). The second elastic member (52) extends along the height direction of the substrate (10). The two ends of the second elastic member (52) abut against the first pressure block (20) and the second pressure block (40).

5. The battery cell tab welding device according to claim 4, characterized in that, The second floating connection assembly (50) further includes a second oil-free bushing (53), which is fixedly connected to the second guide through hole (22), and the second guide member (51) passes through the second oil-free bushing (53); and / or, The second elastic member (52) includes a second floating spring (521), which is sleeved on the second guide member (51). The two ends of the second floating spring (521) abut against the first pressure block (20) and the second pressure block (40).

6. The battery cell tab welding device according to claim 1, characterized in that, The first floating connection assembly (30) includes a first guide member (31) and a first elastic member (32). A first guide through hole (12) is provided on the substrate (10). The first guide member (31) passes through the first guide through hole (12) and is fixedly connected to the first pressure block (20). A first limiting part (311) is provided at the bottom end of the first guide member (31). The first elastic member (32) extends along the height direction of the substrate (10). Both ends of the first elastic member (32) abut against the substrate (10) and the first limiting part (311).

7. The battery cell tab welding device according to claim 6, characterized in that, The first floating connection assembly (30) includes a first oil-free bushing (33), which is fixedly connected to the first guide through hole (12), and the first guide member (31) passes through the first oil-free bushing (33); and / or, The first elastic member (32) includes a first floating spring (321), which is sleeved on the first guide member (31). The two ends of the first floating spring (321) abut against the substrate (10) and the first limiting part (311).

8. The battery cell tab welding device according to claim 1, characterized in that, The clamping mechanism further includes a driving component, which is drivenly connected to the first pressing block (20). The driving component is configured to drive the first pressing block (20) to move along the height direction of the substrate (10) under the action of an external force.

9. The battery cell tab welding device according to claim 8, characterized in that, The driving assembly includes an elbow clamp (60), which is fixedly connected to the base plate (10). The elbow clamp (60) includes a handle (61), a linkage structure (62), and a lifting rod (63). The handle (61) is driven to the lifting rod (63) through the linkage structure (62) and can drive the lifting rod (63) to move along the height direction of the base plate (10) under the action of external force. The top end of the lifting rod (63) abuts against the first pressure block (20).

10. The battery cell tab welding apparatus according to claim 1, characterized in that, It also includes a cell support assembly (70), which includes a first support block (71) and a second support block (72). The first support block (71) is at least partially disposed between the first pressure block (20) and the substrate (10). Along the length direction of the first pressure block (20), the two ends of the first support block (71) are provided with first limiting protrusions (711) extending along the height direction of the substrate (10). Along the length direction of the first pressure block (20), the top of the first support block (71) is provided with a plurality of positioning pins (712) spaced apart. The second support block (72) is disposed at one end of the substrate (10) away from the first support block (71), and the second support block (72) is provided with a second limiting protrusion (721) extending along the height direction of the substrate (10).

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