Battery cell tab and pin welding clamp

Abstract

The utility model discloses a battery cell tab and pin welding fixture, and relates to the technical field of battery production. Comprising a base, a first pressing block and a second pressing block, the first pressing block and the second pressing block are installed on the left side and the right side of the base respectively, the first pressing block is used for pressing a tab on the right side of a battery cell to a pin extending out of the right side of a battery end cover, and the second pressing block is used for pressing a tab on the left side of the battery cell to a pin extending out of the left side of the battery end cover; meanwhile, the first pressing block and the second pressing block are matched with each other to clamp and limit the battery cell. According to the welding clamp for the tabs and the pins of the battery cell, the first pressing block and the second pressing block respectively press the two tabs of the battery cell to the pins and are matched with each other to clamp and limit the battery cell, so that the tabs are kept in the state of being attached to the pins in the whole welding process, the welding quality is improved, and the battery performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a fixture for welding a battery cell tab and a pin. Background Art

[0002] When welding the tabs and pins of a battery cell, it is usually necessary to keep the tabs and pins in close contact during the welding process to avoid a gap between the tabs and pins after welding, which would affect current transmission.

[0003] In this regard, the Chinese utility model with publication number CN218775988U discloses a tab welding fixture. By setting a step on the lower tray to abut the pin, it can ensure that the pin and the tab fit together during welding, reduce the difficulty of welding, and improve the quality of welding.

[0004] However, due to the thermal deformation of the tabs during welding and the influence of the manufacturing process precision, it is impossible for the tabs to fit exactly onto the pins on the steps every time, resulting in unstable welding quality between the tabs and the pins when using the device. Utility Model Content

[0005] The utility model provides a battery cell tab and pin welding fixture, which enables a first pressing block and a second pressing block to press the two tabs of the battery cell onto a respective pin, and also cooperates with each other to clamp and limit the battery cell, so that the tabs remain in contact with the pins during the entire welding process, thereby improving welding quality and battery performance, and solving the above-mentioned technical problems.

[0006] The technical solution of the utility model to solve the above problems is: to provide a battery cell tab and pin welding fixture, including a base, a first pressing block, and a second pressing block, the first pressing block and the second pressing block are respectively installed on the left and right sides of the base, the first pressing block is used to press the tab on the right side of the battery cell onto the pin extending from the right side of the battery end cover, and the second pressing block is used to press the tab on the left side of the battery cell onto the pin extending from the left side of the battery end cover; at the same time, the first pressing block and the second pressing block also cooperate with each other to clamp and limit the battery cell.

[0007] Furthermore, welding openings for exposing a portion of the body of the tab are formed on both the first pressing block and the second pressing block.

[0008] Furthermore, a first column is provided on the right side of the base, and a threaded guide rod is horizontally installed on the first column, a limiting nut is also provided on the threaded guide rod, and a first through hole is provided on the first pressure block; the first pressure block is sleeved on the threaded guide rod through the first through hole, and the limiting nut makes a spiral feed motion on the threaded guide rod to push the first pressure block to move to the left, so that the first pressure block presses the tab to the left onto the pin.

[0009] Furthermore, a screw hole is provided on the left side of the base, a second through hole is opened on the second pressure block, and a fixing bolt is inserted into the second through hole. The fixing bolt is tightened in the screw hole on the left side of the base to fix the second pressure block on the base.

[0010] Furthermore, it also includes a second column arranged on the rear side of the base and a pushing member arranged on the front side of the base. The pushing member is used to push the battery end cover tightly against the battery cell and cooperates with the second column to limit the battery cell.

[0011] Furthermore, the pushing member includes a toggle clamp, a connecting rod, a connecting seat, and a pushing plate. The toggle clamp is installed on the base, and the two ends of the connecting rod extend toward the front and rear sides of the base respectively. One end of the connecting rod is connected to the output end of the toggle clamp, and the other end is installed with the connecting seat. The pushing plate is fixedly installed on one side of the connecting seat; under the action of external force, the toggle clamp is used to push the connecting rod to move backward, thereby driving the connecting seat and the pushing plate to move backward, thereby pressing the battery end cover provided at the pushing plate against the battery cell, and also making the pushing plate and the second column cooperate with each other to clamp and limit the battery cell.

[0012] Furthermore, it also includes a pressure cover plate which is arranged above the base and cooperates with the base to limit the battery cell.

[0013] Furthermore, the front and rear sides of the base are provided with buckles, and the front and rear sides of the pressure cover plate are respectively provided with hooks; the pressure cover plate is locked and connected with the buckles on the front and rear sides of the base by the hooks on its front and rear sides respectively, so as to cooperate with the base to clamp and limit the battery cell.

[0014] Furthermore, both the pressure cover plate and the base are provided with avoidance grooves; when the pressure cover plate presses the limiting battery cell, the avoidance groove on the pressure cover plate and the avoidance groove on the base are arranged opposite to each other, and the side edges of the battery end cover just extend into the two avoidance grooves at the same time.

[0015] Furthermore, it also includes a handle arranged on the base.

[0016] Beneficial effects of the utility model:

[0017] The utility model discloses a battery cell tab and pin welding fixture, which adopts a first pressing block and a second pressing block to press the tabs on the pins on both sides of the battery cell respectively, and both pressing blocks are provided with welding ports for welding operations. While the technicians use the pressing blocks to press the battery cell tabs tightly against the pins, they also use the two pressing blocks to cooperate with each other to clamp the battery cell, and can also weld the tabs and the pins together through the welding ports, and ensure that the tabs are always in a state of close contact with the pins, so as to improve the welding quality of the tabs and the pins.

[0018] In addition, the second pressure block is a fixed installation structure, which can position the battery cell while supporting the battery cell, so that the pushing member can always push the battery cell at the center position of the front side of the battery cell, avoiding eccentric force on the battery cell and ensuring that the battery end cover can be pressed tightly on the front side of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, but not all. Those skilled in the art can derive other drawings from these drawings without inventive effort.

[0020] Figure 1 This is one of the overall structural diagrams of the battery tab and pin welding fixture of this embodiment;

[0021] Figure 2 This is the second overall structural diagram of the battery tab and pin welding fixture of this embodiment;

[0022] Figure 3 is a structural diagram of the base of this embodiment;

[0023] Figure 4 This is an exploded view of the assembly structure of the first pressing block of this embodiment;

[0024] Figure 5 2 is a top view of the second pressing block of this embodiment;

[0025] Figure 6 for Figure 1 A partial enlarged view of

[0026] Figure 7 for Figure 1 A partial enlarged view of B;

[0027] Figure 8 : is a structural diagram of the battery cell and battery end cover in this embodiment;

[0028] 1-base, 2-first pressing block, 3-second pressing block, 4-welding port, 5-first column, 6-threaded guide rod, 7-limiting nut, 8-first through hole, 9-second through hole, 10-second column, 11-pushing member, 12-toggle clamp, 13-connecting rod, 14-connecting seat, 15-pushing plate, 16-pressing plate, 17-buckle, 18-hook, 19-avoidance groove, 20-handle;

[0029] 21-battery end cover, 22-battery cell, 23-tab, 24-pin. DETAILED DESCRIPTION

[0030] In this specification, directional terms such as up, down, left, right, front, back, front, back, top, and bottom, which are mentioned or may be mentioned, are defined relative to the configurations shown in the accompanying drawings. The terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may vary depending on the location and usage of the component. Therefore, these or other directional terms should not be construed as restrictive.

[0031] It should be noted that: in order to more clearly show the relevant structural details, Figures 1 to 3 In the present invention, the specific orientation of the base is different; for the sake of ease of understanding, the applicant will always follow Figure 1 The welding fixture of this embodiment is described as follows based on the orientation in FIG.

[0032] by Figure 1 Taking the direction shown as an example, a battery cell tab and pin welding fixture of a specific embodiment of the present invention includes a base 1, two pushing members 11 provided on the left front side of the base 1, two second columns 10 integrally provided on the right rear side of the base 1, a first pressing block 2 provided on the right front side of the base 1, and a second pressing block 3 provided on the left rear side of the base 1; when the battery cell 22 is placed in the center of the base 1, the tabs 23 on both sides of the battery cell 22 face the first pressing block 2 and the second pressing block 3 respectively, and the battery end cover 21 is provided on the left front side of the battery cell 22, and pins 24 are integrally provided on both sides of the battery end cover 21, and both pins 24 extend toward the right rear side of the base 1.

[0033] Specifically, please refer to Figures 1 to 3 , a notch is provided on the left rear side of the base 1, and a second mounting groove is provided on both sides of the notch (the second mounting groove is Figure 2 and Figure 3 The second pressing block 3 is a long block as a whole. A portion of the body of the second pressing block 3 is concave toward the center of the base 1, and the welding port 4 is horizontally opened on the concave portion of the body; both ends of the second pressing block 3 are vertically opened with second through holes 9, and the two second through holes 9 are both countersunk structures.

[0034] To this end, technicians can set bolts or screws at the second through hole 9 that are screwed and fixed to the base 1 to fix the two ends of the second pressure block 3 at the two second mounting grooves respectively, and then fix the second pressure block 3 on the right rear side of the base 1.

[0035] In addition, please refer to Figures 1 to 3 ,as well as Figure 4 , a notch is provided on the right front side of the base 1, and first mounting grooves are provided on both sides of the notch (the first mounting groove is Figure 2 and Figure 3 Both are located on the left rear side of the base 1), the first columns 5 are fixedly installed in the two first installation grooves by bolts or screws, and the two first columns 5 are both columns, and the upper ends of the two first columns 5 are horizontally fixed with threaded guide rods 6, and limit nuts 7 screwed on the threaded guide rods 6; the first pressing block 2 is an overall long strip block, and a part of the body of the first pressing block 2 is concave toward the center of the base 1, and the welding port 4 is horizontally and horizontally opened on the concave part of the body; first through holes 8 are opened at both ends of the first pressing block 2, and the diameters of the two first through holes 8 are larger than the diameter of the threaded guide rod 6.

[0036] To this end, technicians can connect the two ends of the first pressure block 2 to the two threaded guide rods 6 respectively, and screw the limiting nut 7 on the outside of the first pressure block 2. A limiting nut 7 and a first column 5 form a group, and the two groups of limiting nuts 7 and the first column 5 cooperate with each other to clamp and fix the two ends of the first pressure block 2 respectively; and when the technician screws the limiting nut 7 toward the center of the base 1, the limiting nut 7 will also push the first pressure block 2 to move toward the center of the base 1, so that the first pressure block 2 pushes the battery cell 22 provided on the base 1, so that the left rear side of the battery cell 22 is pressed against the second pressure block 3, and then cooperates with the second pressure block 3 to clamp the battery cell 22.

[0037] Please refer to Figure 1 and Figure 8 , the left rear side and the right front side of the battery cell 22 both have tabs 23. Since the tabs 23 on both sides have the same shape, only the left rear side of the battery cell 22 ( Figure 1 The left rear side of the battery cell 22 is Figure 8 The following describes the structure of the battery cell 22, for example, using the tab 23 on the left front or right rear side of the battery cell 22. The tab 23 on the left rear side of the battery cell 22 is divided into two parts, the upper and lower parts of which are folded inward from the upper and lower edges of the battery cell 22, respectively, to form a cavity of a specific size on the left rear side of the battery cell 22. Therefore, when the pusher 11 pushes the battery end cover 21 toward the battery cell 22, the pin 24 at the end of the battery end cover 21 can be inserted into the cavity. Afterwards, the first pressing block 2 and the second pressing block 3 can further press the tab 23 tightly against the pin 24 to ensure that after the tab 23 and the pin 24 are welded, the tabs 23 on both sides of the battery cell 22 are completely attached to the pin 24.

[0038] Further, please refer to Figures 1 to 3 ,as well as Figure 5 The second through hole 9 is a strip-shaped countersunk hole, and the two ends of the strip-shaped countersunk hole extend toward the left front side and the right rear side of the base 1 respectively; in this regard, when the second pressing block 3 is installed on the left rear side of the base 1, the technician can first adjust the specific position of the second pressing block 3 without completely tightening the bolts or screws to perfectly adjust the welding area to the welding port 4.

[0039] In fact, in this embodiment, a strip-shaped weld mark is specially provided on the surface of the side tab 23 of the battery cell 22 . The above technical means are also provided to enable the weld mark to be completely exposed at the welding port 4 .

[0040] It should be noted that, in this embodiment, the first mounting groove does not form a notch toward the notch, and Figures 1 to 3 It can be seen that the first mounting groove fits exactly with the first column 5, which indicates that: in this embodiment, the first pressing block 2 does not have the ability to move toward the left front side or the right rear side of the base 1; however, in other embodiments, the structure of the first mounting groove can also be the same as the second mounting groove, so that the first pressing block 2 can also move toward the left front side or the right rear side of the base 1; and the above approach is also applicable to the second pressing block 3.

[0041] In fact, whether the first pressing block 2 and / or the second pressing block 3 can move toward the left front side or the right rear side of the base 1 depends in most cases on whether there are special requirements for the welding area of ​​the tab 23 and the pin 24 .

[0042] Further, please refer to Figures 1 to 3 ,as well as Figure 6 The pushers 11 are arranged in pairs on the left front side of the base 1, and the second columns 10 are arranged in pairs on the right rear side of the base 1. One second column 10 is arranged opposite to one pusher 11, and another second column 10 is also arranged opposite to another pusher 11.

[0043] Specifically, the pushing member 11 includes a toggle clamp 12, a connecting rod 13, a connecting seat 14, and a pushing plate 15. A slide rail is additionally provided on the base 1. The connecting seat 14 is slidably set on the slide rail. The pushing plate 15 is installed on the connecting seat 14. The toggle clamp 12 is fixedly installed on the base 1. The connecting rod 13 is horizontally arranged, and one end of the connecting rod 13 is fixedly connected to the toggle clamp 12 and the other end is fixedly connected to the connecting seat 14. The connecting rod 13 is movably installed on one side of the toggle clamp 12.

[0044] To this end, the technicians set a battery end cover 21 on the right rear side of the pushing plate 15, and then manually pressed down the wrench component of the elbow clamp 12 to open the elbow clamp 12 to push the connecting rod 13 to move axially, thereby causing the pushing plate 15 to push the battery end cover 21 in the right rear direction, so that the battery end cover 21 is close to the right front side of the battery cell 22, and at the same time, the pins 24 on both sides of the battery end cover 21 are also moved to both sides of the battery cell 22, so as to facilitate the subsequent welding of the tabs 23 and the pins 24; afterward, the pushing plate 15 continues to push the battery cell 22 and the battery end cover 21, so that the battery cell 22 is pressed against the second column 10, and then cooperates with the second column 10 to clamp the battery cell 22.

[0045] Further, please refer to Figures 1 to 3 ,as well as Figure 7 The base 1 is also provided with a pressure cover plate 16, and buckles 17 respectively arranged on the left front side and the right rear side of the base 1. The buckle 17 on the left front side is located between the two pushers 11, and the buckle 17 on the right rear side is located between the two second columns 10. The two buckles 17 are arranged opposite to each other, and hooks 18 are provided on the left front side and the right rear side of the pressure cover plate 16; in this regard, when the battery cell 22 is placed on the base 1 and limited to the battery cell 22 in the four directions of front, back, left and right, the technician can also install the pressure cover plate 16 to the upper end surface of the battery cell 22, and overlap the two buckles 17 on the two hooks 18 respectively. At this time, the pressure cover plate 16 and the base 1 cooperate with each other to limit the battery cell 22 from the up and down directions.

[0046] In addition, since the vertical width of the battery end cover 21 is larger than the size of the battery cell 22 in actual use, in order to prevent the edge of the battery end cover 21 from being deformed when the pressure cover plate 16 limits the battery cell 22 downward, and to prevent the lower edge of the battery end cover 21 from contacting the base 1 and deforming, an avoidance groove 19 is provided on the pressure cover plate 16 and the base 1. The avoidance groove 19 is used to accommodate the edge of the battery end cover 21 to ensure that the pressure cover plate 16 has a fixed limiting effect on the battery cell 22 on the base 1.

[0047] Moreover, U-shaped handles 20 are provided on the left front side and the right rear side of the base 1 to facilitate carrying by technicians.

[0048] Any matters not mentioned above are applicable to the prior art.

[0049] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; and such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A battery cell tab and pin welding fixture, characterized in that: The battery comprises a base (1), a first pressing block (2), and a second pressing block (3), wherein the first pressing block (2) and the second pressing block (3) are respectively mounted on the left and right sides of the base (1), the first pressing block (2) is used to press the tab (23) on the right side of the battery cell (22) onto the pin (24) extending from the right side of the battery end cover (21), and the second pressing block (3) is used to press the tab (23) on the left side of the battery cell (22) onto the pin (24) extending from the left side of the battery end cover (21); at the same time, the first pressing block (2) and the second pressing block (3) also cooperate with each other to clamp the battery cell (22).

2. The battery cell tab and pin welding fixture according to claim 1, characterized in that: The first pressing block (2) and the second pressing block (3) are both provided with welding openings (4) for exposing a portion of the body of the tab (23).

3. The battery cell tab and pin welding fixture according to claim 1, characterized in that: A first column (5) is provided on the right side of the base (1), and a threaded guide rod (6) is horizontally installed on the first column (5), and a limiting nut (7) is also provided on the threaded guide rod (6). A first through hole (8) is provided on the first pressure block (2); the first pressure block (2) is sleeved on the threaded guide rod (6) through the first through hole (8), and the limiting nut (7) pushes the first pressure block (2) to move leftward by performing a spiral feed motion on the threaded guide rod (6), so that the first pressure block (2) presses the tab (23) to the left against the pin (24).

4. The battery cell tab and pin welding fixture according to claim 3, characterized in that: A screw hole is provided on the left side of the base (1), a second through hole (9) is provided on the second pressing block (3), and a fixing bolt is inserted into the second through hole (9), and the fixing bolt is tightened in the screw hole on the left side of the base (1) to fix the second pressing block (3) on the base (1).

5. The battery cell tab and pin welding fixture according to claim 2, characterized in that: The battery pack further comprises a second column (10) provided on the rear side of the base (1) and a pusher (11) provided on the front side of the base (1). The pusher (11) is used to push the battery end cover (21) against the battery cell (22) and cooperates with the second column (10) to position the battery cell (22).

6. The battery cell tab and pin welding fixture according to claim 5, characterized in that: The pushing member (11) comprises a toggle clamp (12), a connecting rod (13), a connecting seat (14), and a pushing plate (15). The toggle clamp (12) is mounted on the base (1). The two ends of the connecting rod (13) extend toward the front and rear sides of the base (1), respectively. One end of the connecting rod (13) is connected to the output end of the toggle clamp (12), and the other end is mounted with the connecting seat (14). The pushing plate (15) is fixedly mounted on one side of the connecting seat (14). Under the action of an external force, the toggle clamp (12) is used to push the connecting rod (13) backward, thereby driving the connecting seat (14) and the pushing plate (15) to move backward as well, thereby pressing the battery end cover (21) provided at the pushing plate (15) against the battery cell (22), and also making the pushing plate (15) and the second column (10) cooperate with each other to clamp the limiting battery cell (22).

7. The battery cell tab and pin welding fixture according to claim 2, characterized in that: It also includes a pressure cover plate (16) that is arranged above the base (1) and cooperates with the base (1) to limit the battery core (22).

8. The battery cell tab and pin welding fixture according to claim 7, characterized in that: The front and rear sides of the base (1) are both provided with buckles (17), and the front and rear sides of the pressure cover plate (16) are respectively provided with hooks (18); the pressure cover plate (16) is locked and connected with the buckles (17) on the front and rear sides of the base (1) by respectively locking the hooks (18) on the front and rear sides of the pressure cover plate (16) with the buckles (17) on the front and rear sides of the base (1) to cooperate with the base (1) to clamp the limiting battery core (22).

9. The battery cell tab and pin welding fixture according to claim 8, characterized in that: It also includes a handle (20) provided on the base (1).

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