Pre-welding device for multiple tabs of battery cell

Abstract

The utility model belongs to the technical field of lithium battery processing and assembling, and particularly relates to a pre-welding device for multiple tabs of a battery cell, a first clamping assembly and a second clamping assembly can transversely move on a bottom plate to reduce or enlarge the area of an accommodating cavity so as to accommodate the battery cells with different sizes, and when the tabs of the battery cells are welded, the pre-welding device can be used for welding the tabs of the battery cells. When the tabs are welded, the tabs need to be fixed, under the condition that the tabs are possibly warped, the tabs are welded poorly, so that the arranged upper cover plate is used for pressing the tabs and preventing the tabs from being warped, and when the tabs are welded by the multi-tab tabs, the tabs need to be fixed in a centralized manner firstly, and then the tabs are welded in the centralized manner; the first tab adjusting block group and the second tab adjusting block group are respectively arranged on the upper side and the lower side of the tabs, and the tabs are fixed in a centralized manner by adjusting the positions of the first tab adjusting block group and the second tab adjusting block group, so that the subsequent welding of the tabs is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery processing and assembly technology, and in particular relates to a pre-welding device for multi-tabs of battery cells. Background Technology

[0002] Batteries come in various types, including dry cell batteries, lithium batteries, and rechargeable batteries. Dry cell batteries are disposable and commonly used in flashlights, transistor radios, etc. Lithium batteries include lithium metal batteries and lithium-ion batteries, which have high energy density and long lifespan. Rechargeable batteries are rechargeable batteries widely used in mobile phones, electric vehicles, and other fields. Batteries are widely used in modern society, playing an important role not only in daily life and technological products, but also in the national economy, science and technology, and military fields.

[0003] With increasingly fierce competition in the new energy market, lithium batteries have experienced rapid development. To better develop, battery manufacturers are increasingly focusing on and researching their cell manufacturing processes and costs. Currently, some cell manufacturers in the industry do not use the pre-welding process for coiled core tabs in intermediate stages of the manufacturing process; similarly, while some manufacturers have pre-welding processes, their pre-welding equipment only supports pre-welding of coiled core tabs under one process, and cannot accommodate pre-welding of different coiled core sizes and different tab types. In particular, for R&D lines, the R&D department frequently needs to verify coiled cores with different processes, sizes, and tab types, resulting in numerous dedicated pre-welding devices and frequent device changes. This not only hinders production line operations but may also affect the progress of R&D products due to equipment delivery issues, and increase R&D costs.

[0004] Chinese patent publication number "CN 210413214 U" discloses an ultrasonic welding fixture structure. The document discloses a base plate, a positioning plate and a right positioning plate on the base plate, and a rear positioning plate disposed on the side of the base away from the welding head hole. It can be seen from the above that the published document discloses a device that can be adjusted according to the size of the battery cell to clamp the battery cell. However, the above document does not limit the top of the battery and the tabs. Utility Model Content

[0005] The purpose of this utility model is: based on the inventor's own practice and combined with actual use, in order to address the shortcomings of the existing technology, the inventor designed a pre-welding device for battery cells with multiple tabs, in order to solve the technical problem that the existing technology cannot clamp and limit the top of the battery cell and the tabs when welding the battery cell tabs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A battery cell pre-welding device includes a base plate, a first clamping assembly, a second clamping assembly, and an upper cover plate;

[0008] The first clamping component and the second clamping component are disposed opposite to each other on the base plate, and both the first clamping component and the second clamping component are movably connected to the base plate, and there is a receiving cavity between the first clamping component and the second clamping component;

[0009] The upper cover plate is disposed on the upper side of the first clamping component and the second clamping component, and the upper cover plate is in contact with the first clamping component and the second clamping component respectively;

[0010] The upper cover plate and the bottom plate are respectively provided with a first electrode adjustment block group and a second electrode adjustment block group, which are arranged opposite to each other.

[0011] Furthermore, the receiving cavity has a first opening and a second opening arranged in parallel, and a pushing component is also provided on the base plate. The pushing component is disposed at the first opening, and a portion of the pushing component extends into the receiving cavity through the first opening.

[0012] Furthermore, the pushing assembly includes a fixed block and a pushing plate. The fixed block is fixedly disposed on the base plate, and the pushing plate is disposed between the fixed block and the receiving cavity. A push rod is inserted through the fixed block, and the end of the push rod is connected to the pushing plate. The push rod pushes the pushing plate to move in the receiving cavity.

[0013] Furthermore, one side of the upper cover plate is connected to the first clamping assembly via a rotating assembly, and the upper cover plate rotates along the rotating assembly.

[0014] Furthermore, a locking component is provided on the other side of the upper cover plate and the second clamping component, and the locking component is connected to the upper cover plate and the second clamping component respectively.

[0015] Furthermore, the first electrode adjustment block group is movably connected to the upper cover plate, and the second electrode adjustment block group is movably connected to the bottom plate. Both the first electrode adjustment block group and the second electrode adjustment block group are longitudinally adjustable, and each of the first electrode adjustment block group and the second electrode adjustment block group has a rounded edge on its opposite side.

[0016] Furthermore, adjustment plates are provided between the upper cover plate and the first electrode adjustment block group, and between the bottom plate and the second electrode adjustment block group. The adjustment plates are provided with a plurality of fixing holes for fixing the first electrode adjustment block group and / or the second electrode adjustment block group.

[0017] Furthermore, both the first clamping component and the second clamping component are provided with limiting portions, which are located at the second opening, and the two limiting portions are arranged opposite to each other within the receiving cavity.

[0018] Furthermore, the base plate is also provided with a handle, which is symmetrically arranged on both sides of the first clamping component and the second clamping component, and the handle is fixedly connected to the base plate.

[0019] Furthermore, the handles located on both sides of the first clamping component and the second clamping component are at the same height, and the height of the handles is higher than the height of the first clamping component.

[0020] The beneficial effect of this utility model is that the multi-tab pre-welding device for battery cells provided by this utility model allows the first clamping component and the second clamping component to move laterally on the base plate, reducing or expanding the area of ​​the accommodating cavity to accommodate battery cells of different sizes. When welding the battery cell tabs, the tabs need to be fixed. In this case, the battery cell may experience tail lifting, resulting in poor tab welding. Therefore, the upper cover plate is provided to press down on the battery cell to prevent tail lifting. When welding the tabs of a multi-tab battery cell, multiple tabs need to be fixed together first. The first tab adjustment block group and the second tab block group are respectively placed on the upper and lower sides of the tab. By adjusting the positions of the first tab adjustment block group and the second tab adjustment block group, multiple tabs are fixed together, which facilitates the subsequent welding of the tabs. Attached Figure Description

[0021] The following will refer to the appendix. Figures 1-10 This section describes the features, advantages, and technical effects of exemplary embodiments of the present invention.

[0022] Figure 1 This is an overall structural view of the pre-welding device in this utility model;

[0023] Figure 2 for Figure 1 A magnified view of part A;

[0024] Figure 3 for Figure 1 A magnified view of part B;

[0025] Figure 4 This is a side view of the first electrode adjustment block group and the second electrode adjustment block group in this utility model;

[0026] Figure 5 This is a top view of the pre-welding device in this utility model;

[0027] Figure 6 This is a bottom view of the pre-welding device in this utility model;

[0028] Figure 7 This is a side view of the pre-welding device in this utility model;

[0029] Figure 8 for Figure 7 A magnified view of part of C;

[0030] Figure 9 This is a flip view of the upper cover plate and the first clamping assembly in this utility model;

[0031] Figure 10 for Figure 9 Top view of the pre-welding device.

[0032] In the diagram: 1. Base plate; 2. First clamping assembly; 3. Second clamping assembly; 4. Top cover plate; 5. Receiving cavity; 6. First electrode adjustment block assembly; 7. Second electrode adjustment block assembly; 8. Pushing assembly; 12. Rotating assembly; 13. Locking assembly; 14. Adjusting plate; 15. Handle; 16. Battery cell;

[0033] 11. Second strip countersunk through groove;

[0034] 21. Limiting part; 22. First strip countersunk groove;

[0035] 51. First opening; 52. Second opening;

[0036] 61. Sliding groove; 62. Rounded edge;

[0037] 81. Fixed block; 82. Push plate; 83. Push rod;

[0038] 121. Upper rotating block; 122. Lower rotating block; 123. Rotating shaft;

[0039] 131. Lock base; 132. Lock handle; 133. Lock latch; 134. U-shaped part; 135. Groove; 141. Fixing hole. Detailed Implementation

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0041] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0042] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be related to...

[0043] Other embodiments combined.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0045] The following is in conjunction with the appendix Figures 1-10 The present invention will be described in further detail, but this is not intended to limit the scope of the present invention.

[0046] like Figure 1 As shown, this embodiment discloses a pre-welding device for battery cell 16, including a base plate 1, a first clamping assembly 2, a second clamping assembly 3, and an upper cover plate 4;

[0047] The first clamping component 2 and the second clamping component 3 are disposed opposite to each other on the base plate 1, and both the first clamping component 2 and the second clamping component 3 are movably connected to the base plate 1, and there is a receiving cavity 5 between the first clamping component 2 and the second clamping component 3;

[0048] The upper cover plate 4 is disposed on the upper side of the first clamping assembly 2 and the second clamping assembly 3, and the upper cover plate 4 is in contact with the first clamping assembly 2 and the second clamping assembly 3 respectively;

[0049] The upper cover plate 4 and the bottom plate 1 are respectively provided with a first electrode adjustment block group 6 and a second electrode adjustment block group 7, which are arranged opposite to each other.

[0050] like Figure 1 , 5As shown in Figures 9 and 1, the first clamping assembly 2 and the second clamping assembly 3 can move laterally on the base plate 1 to reduce or expand the area of ​​the accommodating cavity 5, thereby accommodating battery cells 16 of different sizes. When welding the tabs of the battery cell 16, the tabs need to be fixed first. When fixing the tabs, the force on the tabs will cause the battery cell 16 to lift up, which will eventually lead to poor welding of the tabs. Therefore, the upper cover plate 4 is provided to press down on the battery cell 16 to prevent the battery cell 16 from lifting up. When welding the tabs of a multi-tab battery cell 16, multiple tabs need to be gathered and fixed together. The first tab adjustment block group 6 and the second tab adjustment block group 7 are respectively placed on the upper and lower sides of the tabs. By adjusting the position of the first tab adjustment block group 6 and the second tab adjustment block group 7, multiple tabs are gathered and fixed together, which facilitates the subsequent welding of the tabs.

[0051] like Figure 5 and Figure 6 As shown, specifically, both the first clamping assembly 2 and the second clamping assembly 3 are provided with a first strip countersunk groove 22, and the base plate 1 is provided with a second strip groove mirroring the first strip countersunk groove 22. A screw is provided in the first strip groove, and one end of the screw is placed in the second strip countersunk groove 11 through the first strip countersunk groove 22. A nut is provided in the second strip countersunk groove 11, and the nut is sleeved on the end of the screw. The first clamping assembly 2 and the second clamping assembly 3 are fixed to the base plate 1 by the screw and the nut.

[0052] like Figure 9 As shown, when the size of the battery cell 16 that needs to be fixed does not match that of the receiving cavity 5 (the receiving cavity 5 is too large or too small), the screw is turned to loosen the connection between the first clamping assembly 2 and the second clamping assembly 3 and the base plate 1. After the first clamping assembly 2 and the second clamping assembly 3 are adjusted to a suitable position (so that the battery cell 16 can be clamped and the battery cell 16 will not shake), the screw is tightened to complete the adjustment of the size of the receiving cavity 5.

[0053] like Figure 9 and Figure 10 As shown, in this embodiment, the receiving cavity 5 has a first opening 51 and a second opening 52 arranged in parallel. A pushing component 8 is also provided on the bottom plate 1. The pushing component 8 is located at the first opening 51, and a part of the pushing component 8 extends into the receiving cavity 5 through the first opening 51.

[0054] Specifically, the receiving cavity 5 has a first opening 51 and a second opening 52, indicating that the receiving cavity 5 is an open cavity. Only an open cavity has the function of adjustment. After the battery cell 16 is placed in the receiving cavity 5, the end of the battery cell 16 away from the tab is opposite to the pushing component 8. When the length of the receiving cavity 5 does not match the size of the battery cell 16 (the length of the receiving cavity 5 is too long or too short), the pushing component 8 is adjusted to restrict the battery cell 16 within the receiving cavity 5. If the length of the receiving cavity 5 is too small, the battery cell 16 cannot be installed. If the length of the receiving cavity 5 is too large, when the first tab adjustment block group 6 and the second tab adjustment block group 7 clamp the tab, the battery cell 16 will move towards the pushing component 8, resulting in inaccurate tab clamping position and deviation of the welding position.

[0055] like Figure 10 As shown, in this embodiment, the pushing component 8 includes a fixing block 81 and a pushing plate. The fixing block 81 is fixedly disposed on the base plate 1, and the pushing plate is disposed between the fixing block 81 and the receiving cavity 5. A push rod 83 is passed through the fixing block 81, and the end of the push rod 83 is connected to the pushing plate. The push rod 83 pushes the pushing plate to move in the receiving cavity 5.

[0056] Specifically, the surface of the push rod 83 is provided with threads, and the fixing block 81 is provided with a through hole. The through hole is provided with threads that are complementary to the threads. The push rod 83 is placed in the through hole. By rotating the push rod 83, the position of the push rod 83 changes, and at the same time, the push plate moves. The thread not only enables the push plate to move, but also prevents the push plate from retracting due to the rebound of the battery cell 16. The end of the push rod 83 is connected to the push plate through a bearing. When the push rod 83 rotates, it will not cause the push plate to rotate.

[0057] like Figure 1 and Figure 2 As shown, in this embodiment, one side of the upper cover plate 4 and the first clamping assembly 2 are connected by a rotating assembly 12, and the upper cover plate 4 rotates along the rotating assembly 12.

[0058] Specifically, the rotating assembly 12 includes an upper rotating block 121 and a lower rotating block 122, which are connected by a rotating shaft 123. The upper rotating block 121 is fixedly connected to one side of the upper cover plate 4, and the lower rotating block 122 is connected to the side of the first clamping assembly 2. The upper cover plate 4 and the upper rotating block 121 rotate along the rotating shaft 123. After the upper cover plate 4 rotates, the receiving cavity 5 is completely exposed to the outside, which makes it easy to pick up and place the battery cell 16. At the same time, when the upper cover plate 4 is closed, it can press against the upper surface of the battery cell 16 to prevent the battery cell 16 from sticking out when welding or limiting the electrode tab.

[0059] like Figure 7 and Figure 8As shown, in this embodiment, a locking component 13 is provided on the other side of the upper cover plate 4 and the second clamping component 3. The locking component 13 is connected to the upper cover plate 4 and the second clamping component 3 respectively.

[0060] Specifically, the locking assembly 13 includes a lock seat 131, a lock handle 132, a latch 133, and a U-shaped component 134. The lock seat 131 is located on the side of the upper cover plate 4. The lock handle 132 is rotatably connected to the lock seat 131 via a pin. The latch 133 is located on the side of the second clamping assembly 3. The latch 133 has a groove 135 facing away from the lock handle 132. The lock handle 132 is placed in the opening of the U-shaped component 134. The bottom of the U-shaped component 134 cooperates with the groove 135. The locking assembly 13 fixes the upper cover plate 4 and the second clamping assembly 3. When working on the battery cell 16, the upper cover plate 4 is always in contact with the battery cell 16, improving the quality of the electrode tab welding of the battery cell 16.

[0061] like Figure 1 , 3 As shown in Figures 4 and 5, in this embodiment, the first electrode adjustment block group 6 is movably connected to the upper cover plate 4, and the second electrode adjustment block group 7 is movably connected to the bottom plate 1. Both the first electrode adjustment block group 6 and the second electrode adjustment block group 7 can be adjusted longitudinally, and both sides of the first electrode adjustment block group 6 and the second electrode adjustment block group 7 are provided with arc edges 62.

[0062] Specifically, both the first electrode adjustment block group 6 and the second electrode adjustment block group 7 are provided with sliding grooves 61, and screws are provided in the sliding grooves 61. The first electrode adjustment block group 6 and the second electrode adjustment block group 7 are fixed by the screws. When it is necessary to adjust the first electrode adjustment block group 6 and the second electrode adjustment block group 7, simply loosen the screws and adjust the position of the first electrode adjustment block group 6 and the second electrode adjustment block group 7 along the setting direction of the sliding groove 61.

[0063] Meanwhile, a rounded edge 62 is provided on the opposite side of the first electrode adjustment block group 6 and the second electrode adjustment block group 7. When the first electrode adjustment block group 6 and the second electrode adjustment block group 7 retract the multi-electrode, the design of the rounded edge 62 ensures a smooth transition between the first electrode adjustment block group 6 and the second electrode adjustment block group 7 and the electrode, preventing the first electrode adjustment block group 6 and the second electrode adjustment block group 7 from cracking the electrode.

[0064] like Figure 1 and Figure 3 As shown, in this embodiment, there are two sets of the first tab adjustment block group 6 and the second tab adjustment block group 7. Since the battery cell 16 has two tabs, positive and negative, each first tab adjustment block group 6 and the second tab adjustment block group 7 corresponds to a positive tab or a negative tab, respectively.

[0065] like Figure 3As shown, in this embodiment, an adjustment plate 14 is provided between the upper cover plate 4 and the first electrode adjustment block group 6, and between the bottom plate 1 and the second electrode adjustment block group 7. The adjustment plate 14 is provided with a plurality of fixing holes 141 for fixing the first electrode adjustment block group 6 and / or the second electrode adjustment block group 7.

[0066] Specifically, the adjusting plate 14 has multiple fixing holes 141 arranged horizontally. When the position of the electrode ear does not correspond to the first electrode ear adjusting block group 6 and the second electrode ear adjusting block group 7, the screws on the first electrode ear adjusting block group 6 and the second electrode ear adjusting block group 7 can be loosened, the first electrode ear adjusting block group 6 and the second electrode ear adjusting block group 7 can be removed, and then the first electrode ear adjusting block group 6 and the second electrode ear adjusting block group 7 can be installed in the position corresponding to the electrode ear. The multiple fixing holes 141 can make the first electrode ear adjusting block group 6 and the second electrode ear adjusting block group 7 adapt to the electrode ear in different positions, thereby closing and fixing the electrode ear.

[0067] like Figure 9 and Figure 10 As shown, in this embodiment, both the first clamping component 2 and the second clamping component 3 are provided with limiting parts 21. The limiting parts 21 are located at the second opening 52, and the two limiting parts 21 are arranged opposite to each other in the receiving cavity 5.

[0068] Specifically, after the battery cell 16 is placed in the receiving cavity 5, in order to prevent the battery cell 16 from protruding from the receiving cavity 5 and causing the electrode tab welding position to deviate, a limiting part 21 is provided to limit the end of the battery cell 16 with the electrode tab, so as to prevent the battery cell 16 from protruding from the receiving cavity 5.

[0069] Meanwhile, the limiting part 21 works in conjunction with the pushing component 8. For example, if the length of the receiving cavity 5 is longer than the length of the battery cell 16, after determining the placement direction of the battery cell 16, the battery cell 16 can be randomly placed in the receiving cavity 5. Then, the pusher plate is pushed to the second opening 52 by the pusher rod 83. The pusher plate pushes the battery cell 16 to the second opening 52 until the end face of the battery cell 16 abuts against the limiting part 21, thus completing the limiting of the battery cell 16. This greatly improves work efficiency, as it eliminates the need for precise placement of the battery cell 16. Subsequent operations can also ensure that the electrode tabs of the battery cell 16 are precisely positioned.

[0070] like Figure 9 As shown, in this embodiment, a handle 15 is also provided on the base plate 1. The handle 15 is symmetrically arranged on both sides of the first clamping component 2 and the second clamping component 3, and the handle 15 is fixedly connected to the base plate 1.

[0071] Specifically, the handle 15 facilitates the movement of the device in this utility model. Since the device has many parts, it is relatively heavy. When moving it, one usually reaches into the bottom of the base plate 1 to move the device. However, it is not easy to lift the device before moving it. After moving it to the correct position, putting the device down may cause it to hit one's hand, which poses a high safety hazard. Therefore, the handle 15 is provided for moving the device.

[0072] like Figure 9 As shown, in this embodiment, the handles 15 disposed on both sides of the first clamping component 2 and the second clamping component 3 are at the same height, and the height of the handles 15 is higher than the height of the first clamping component 2.

[0073] After the electrode tabs of the battery cell 16 are welded, the locking assembly 13 is released and the battery cell 16 is taken out. The upper cover plate 4, which is rotated along the rotating assembly 12, rests against the handle 15. After the new battery cell 16 is placed in the receiving cavity 5, the upper cover plate 4 can be rotated quickly and conveniently to press the battery cell 16.

[0074] The height of the handle 15 is higher than the height of the first clamping component 2 and the second clamping component 3, so that when the upper cover plate 4 is against the handle 15, the upper cover plate 4 has a certain angle. It should be noted that the height of the handle 15 cannot be more than three times the height of the first clamping component 2 or the second clamping component 3. The upper cover plate 4 is angled against the handle so that the upper cover plate 4 will not fall into the receiving cavity 5 and it is also convenient for the staff to flip the upper cover plate 4.

[0075] The specific working principle of this application is as follows: First, the first clamping assembly 2, the second clamping assembly 3, and the pushing assembly 8 are adjusted to their maximum extent to maximize the space within the receiving cavity 5. Then, the battery cell 16 is placed inside the receiving cavity 5. Subsequently, the first clamping assembly 2 and the second clamping assembly 3 are adjusted to clamp the battery cell 16. After adjustment, the pushing assembly 8 is adjusted. Rotating the push rod 83 moves the pushing plate and the battery cell 16 toward the second opening 52 until one end of the battery cell 16 abuts against the limiting part 21. The upper cover plate 4 is rotated to abut against the upper surface of the battery cell 16. The upper cover plate 4 is then fixed to the second clamping assembly 3 by the locking assembly 13. The first electrode adjustment block assembly 6 is then adjusted. The positions of the first and second tab adjustment blocks 6 and 7 are adjusted so that they correspond to and clamp the positive or negative tabs, bringing the multi-tabs together in the center. Finally, the multi-tabs are welded together using external welding equipment to make them a single unit. After welding, the locking assembly 13 is released and the upper cover plate 4 is flipped. At the same time, the first tab adjustment block 6 and the upper cover plate 4 are flipped synchronously, releasing the upper cover plate 4 from contact with the battery cell 16. The first tab adjustment block 6 is released from restricting the tabs. At this point, the battery cell 16 can be taken out and a new battery cell 16 can be inserted. This process is repeated until a new size or a battery cell 16 with a different tab position needs to be welded. Only then is the device adjusted.

[0076] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and 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.

[0077] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this utility model are within the protection scope of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A pre-welding device for multi-tab battery cells, characterized in that: Includes a base plate, a first clamping assembly, a second clamping assembly, and a top cover plate; The first clamping component and the second clamping component are disposed opposite to each other on the base plate, and both the first clamping component and the second clamping component are movably connected to the base plate, and there is a receiving cavity between the first clamping component and the second clamping component; The upper cover plate is disposed on the upper side of the first clamping component and the second clamping component, and the upper cover plate is in contact with the first clamping component and the second clamping component respectively; The upper cover plate and the bottom plate are respectively provided with a first electrode adjustment block group and a second electrode adjustment block group, which are arranged opposite to each other.

2. The pre-welding device for multi-tab battery cells according to claim 1, characterized in that: The receiving cavity has a first opening and a second opening arranged in parallel. A pushing component is also provided on the base plate. The pushing component is located at the first opening, and a portion of the pushing component extends into the receiving cavity through the first opening.

3. The pre-welding device for multi-tab battery cells according to claim 2, characterized in that: The pushing assembly includes a fixed block and a pushing plate. The fixed block is fixedly disposed on the base plate, and the pushing plate is disposed between the fixed block and the receiving cavity. A push rod is provided through the fixed block, and the end of the push rod is connected to the pushing plate. The push rod pushes the pushing plate to move in the receiving cavity.

4. The pre-welding device for multi-tab battery cells according to claim 1, characterized in that: One side of the upper cover plate is connected to the first clamping assembly via a rotating assembly, and the upper cover plate rotates along the rotating assembly.

5. The pre-welding device for multi-tab battery cells according to claim 1, characterized in that: A locking component is provided on the other side of the upper cover plate and the second clamping component, and the locking component is connected to the upper cover plate and the second clamping component respectively.

6. The pre-welding device for multi-tab battery cells according to claim 1, characterized in that: The first electrode adjustment block group is movably connected to the upper cover plate, and the second electrode adjustment block group is movably connected to the bottom plate. Both the first electrode adjustment block group and the second electrode adjustment block group are longitudinally adjustable, and each of the first electrode adjustment block group and the second electrode adjustment block group has a rounded edge on its opposite side.

7. The pre-welding device for multi-tab battery cells according to claim 6, characterized in that: Adjustment plates are provided between the upper cover plate and the first electrode adjustment block group, and between the bottom plate and the second electrode adjustment block group. The adjustment plates are provided with a plurality of fixing holes for fixing the first electrode adjustment block group and / or the second electrode adjustment block group.

8. The pre-welding device for multi-tab battery cells according to claim 2, characterized in that: Both the first clamping assembly and the second clamping assembly are provided with limiting portions, which are located at the second opening, and the two limiting portions are arranged opposite to each other within the receiving cavity.

9. The pre-welding device for multi-tab battery cells according to claim 1, characterized in that: The base plate is also provided with a handle, which is symmetrically arranged on both sides of the first clamping component and the second clamping component, and the handle is fixedly connected to the base plate.

10. The pre-welding device for multi-tab cells according to claim 9, characterized in that: The handles located on both sides of the first clamping component and the second clamping component are at the same height, and the height of the handles is higher than the height of the first clamping component.

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