A pressure claw and welding equipment

Abstract

This application provides a clamping claw and welding equipment. The clamping claw includes a fixing part and a pressing part, the pressing part being connected to the fixing part. The surface of the pressing part that contacts the structure to be pressed is a pressing surface, and the pressing surface has multiple outer edges. The pressing part is provided with a first clearance hole extending through to the pressing surface, and the first clearance hole communicates with at least one of the multiple outer edges. This reduces the area obstructed by the pressing part on the tab, and correspondingly reduces the area of ​​the tab used for pressing and the space occupied in the battery, resulting in a smaller battery package size. With a fixed main unit compartment space, more internal space can be allocated to the battery cell, increasing battery capacity and adapting to the development trend of high-capacity, small-volume batteries.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a pressure claw and welding equipment. Background Technology

[0002] The battery control board needs to be connected to the battery tabs. The control board has solder pads, and the tabs are soldered onto these pads to connect the tabs to the control board. To ensure soldering quality, the soldering equipment is equipped with clamping claws to fix the solder pads and tabs. The clamping claws press against the solder pads and tabs to ensure a tight fit and prevent gaps between the solder pads and tabs that could lead to solder cracking or poor soldering.

[0003] The area on the tab held down by the clamping claws cannot be welded; it is only used for pressing. To achieve reliable welding between the tab and the pad, the welding area between them needs to meet certain conditions. Therefore, with a constant welding area and a large pressing area, the tab area will also be relatively large. Increasing the tab size will occupy more internal battery space, affecting battery capacity. Utility Model Content

[0004] This utility model provides a pressing claw and welding equipment to solve the problem in related technologies where the area of ​​the tabs used for pressing is large and occupies the internal space of the battery.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] Firstly, this utility model provides a pressure claw, including a fixing part and a pressing part, wherein the pressing part is connected to the fixing part, and the surface of the pressing part for contacting the structure to be pressed is a pressing surface, and the pressing surface has multiple outer edges; wherein...

[0007] The pressing part is provided with a first clearance hole that extends through to the pressing surface, and the first clearance hole communicates with at least one portion of the plurality of outer edges.

[0008] Optionally, the outer edge with the largest size among the plurality of outer edges is the first outer edge, and the first clearance hole is at least partially connected to the first outer edge.

[0009] Optionally, the pressing surface further has a second outer edge, a third outer edge, and a fourth outer edge, wherein the first outer edge is opposite to the second outer edge in a first direction, and the third outer edge is opposite to the fourth outer edge in a second direction; wherein,

[0010] The first clearance hole has a first hole wall extending along the second direction, a second hole wall extending along the first direction, and a third hole wall extending along the first direction. The first hole wall is close to the second outer edge, the second hole wall is close to the third outer edge, and the third hole wall is close to the fourth outer edge.

[0011] Optionally, the dimensions of the third outer edge and the fourth outer edge are L1, and the dimensions of the second hole wall and the third hole wall are L2, where L1 / L2≥1.2.

[0012] Optionally, the distance between the second outer edge and the first hole wall is D1, where D1 = L2 - L1 ≥ 0.5 mm.

[0013] Optionally, the distance between the third outer edge and the second hole wall is D2, and the distance between the fourth outer edge and the third hole wall is D3, where D2 ≥ 1 mm and D3 ≥ 1 mm.

[0014] Optionally, the pressure claw further includes a first connecting portion and a second connecting portion connected to each other. The first connecting portion and the second connecting portion are set at a preset angle. The first connecting portion is connected to the fixing portion. One end of the second connecting portion is connected to the first connecting portion, and the other end is connected to the pressing portion. The first connecting portion and the pressing portion are arranged opposite to each other. The first connecting portion is provided with a second clearance hole. The second clearance hole is opposite to the first clearance hole, and the size of the second clearance hole is larger than the size of the first clearance hole.

[0015] Optionally, the second connecting portion is provided with a third clearance hole, which communicates with the first clearance hole.

[0016] Optionally, the diameter of the first clearance hole increases in the direction from the pressing surface to away from the pressing surface.

[0017] Secondly, this utility model also provides a welding device, including any of the pressure claws disclosed in the first aspect.

[0018] This utility model provides a clamping claw and welding equipment. The clamping claw has a fixing part and a pressing part. The pressing part is provided with a first clearance hole that extends to the pressing surface. The first clearance hole is connected to at least one outer edge of the pressing part. The area of ​​the pressing surface is reduced, thereby reducing the area of ​​the pressing part that is blocked on the tab. The area of ​​the tab used for pressing and the space occupied in the battery are also reduced accordingly, which reduces the battery packaging size. With the main unit compartment space fixed, more internal space can be allocated to the battery cell, increasing the battery capacity and adapting to the development trend of high capacity and small size of batteries. Attached Figure Description

[0019] Figure 1This diagram illustrates a pressure claw provided in an embodiment of the present invention.

[0020] Figure 2 express Figure 1 A schematic diagram showing another angle of the pressure claw;

[0021] Figure 3 express Figure 1 A schematic diagram showing another angle of the pressure claw;

[0022] Figure 4 express Figure 3 A magnified view of part A shown in the middle circle;

[0023] Figure 5 express Figure 1 A top view of the pressure jaws shown;

[0024] Figure 6 express Figure 5 A magnified view of a portion of the pressure claw shown;

[0025] Figure 7 express Figure 1 The front view of the pressure claw is shown.

[0026] Figure label:

[0027] 100: Claw; 10: Fixing part; 11: Mounting hole; 20: Pressing part; 21: Pressing surface; 211: First outer edge; 212: Second outer edge; 213: Third outer edge; 214: Fourth outer edge; 22: First clearance hole; 221: First hole wall; 222: Second hole wall; 223: Third hole wall; 30: First connecting part; 31: Second clearance hole; 40: Second connecting part; 41: Third clearance hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0030] This utility model embodiment provides a pressure claw 100, such as Figure 1-3 As shown, the pressure claw 100 includes a fixing part 10 and a pressing part 20. The pressing part 20 is connected to the fixing part 10. The surface of the pressing part 20 away from the fixing part 10 is a pressing surface 21, which has multiple outer edges. The pressing part 20 is provided with a first clearance hole 22 that extends to the pressing surface 21. The first clearance hole 22 communicates with at least one portion of the multiple outer edges.

[0031] The fixing part 10 is used to connect to the welding equipment, fixing the pressure claw 100 to the welding equipment. The welding equipment controls the movement of the pressure claw 100 to a designated position. Optionally, the fixing part 10 is provided with a mounting hole 11, and a corresponding threaded hole is provided on the welding equipment. Fasteners such as screws and bolts are inserted into the mounting hole 11 and the threaded hole to fix the pressure claw 100 to the welding equipment. The position of the pressure claw 100 and the position of the solder joint can be adjusted by a charge-coupled device (CCD) and a servo motor to ensure that the pressure claw 100 and the solder joint are located between the tab and the solder pad, thereby more accurately positioning the pressure claw 100 and the solder joint and improving the welding effect.

[0032] The pressing part 20 is used to tightly fit the components to be welded together and keep their surfaces flat to ensure welding quality. In this embodiment, the components to be welded are the battery tabs and the solder pads on the protection board. The pressing part 20 has a pressing surface 21, which is pressed onto the surface of the tab. The part of the tab covered by the pressing surface 21 cannot be welded. Depending on whether it is covered by the pressing surface 21, the surface of the tab can be divided into a welding area and a pressing area. The size of the welding area is mainly determined by the material properties, current load requirements, welding process parameters, and mechanical strength requirements. The size of the pressing area is determined by the size of the pressing surface 21 of the pressure claw 100 and the pressing strength. The size of the welding area and the pressing area directly affect the size of the tab and the space occupied by the tab in the host.

[0033] Understandably, the welding area on the electrode tab is usually surrounded by a pressing area to fix the electrode tab in all directions, ensuring that all positions of the welding area in the middle are tightly fitted with the protective plate. This improves welding quality during laser welding and prevents weld spatter or incomplete welds. Correspondingly, the pressing part 20 and the pressing surface 21 are hollow annular structures with a first clearance hole 22 in the middle for the laser to pass through. The first clearance hole 22 corresponds to the welding area, and the pressing surface 21 corresponds to the pressing area. The inner boundary of the pressing surface 21 is the wall of the first clearance hole 22, and the outer boundary is the outer edge. When the outer edge of the electrode tab is covered by the pressing surface, the minimum dimension of the electrode tab in a certain direction is equal to the dimension of the pressing surface in that direction plus the dimension of the welding area in that direction. The dimension of the pressing surface in that direction is the distance between the outer edge and the wall of the first clearance hole 22.

[0034] Therefore, with a fixed welding area, the structure and size of the pressing surface limit the minimum size of the tab, thus limiting the minimum size of the battery package for a given capacity. Especially when the cell is placed on the welding equipment, the pressing part 20 interferes with the cell head along its outer edge, limiting the positional relationship between the pressing part 20 and the cell. This results in a gap between the welding area and the cell head, which limits the size of the tab. The length of the tab must be at least equal to the length of the gap plus the length of the welding area, and the length of the gap is equal to the distance between the pressing surface near the outer edge of the cell and the wall of the first clearance hole 22.

[0035] Based on this, the clamping claw 100 provided in this embodiment of the utility model has optimized the design of the clamping part 20. Without affecting the fixing effect, a portion of its outer edge is appropriately removed. The clamping part 20 no longer constrains the electrode tab in this direction, so that the area of ​​the electrode tab used for clamping in this direction is released. The welding area can directly serve as the boundary of the electrode tab, and the area of ​​the removed clamping area is the area saved on the electrode tab. The first clearance hole 22 is connected to at least one outer edge of the clamping surface 21, so that the first clearance hole 22, the clamping surface 21, and the clamping area on the electrode tab are open structures. If at least one side of the electrode tab is not clamped by the clamping surface 21, the welding area can extend to the boundary of the electrode tab on this side. The clamping surface 21 on this side is hollowed out. The area reduced by hollowing out the clamping surface 21 is equal to the area reduced by the electrode tab, which is equal to the length of the first outer edge 211 connected to the first clearance hole 22 multiplied by the wall thickness.

[0036] The opening direction of the first clearance hole 22 can be arbitrarily selected, and multiple openings can be provided. In this embodiment, for illustration, the opening is provided at the end of the pressure claw 100 away from the fixing part 10. In other embodiments, multiple openings can also be provided in different directions of the pressure claw 100. Depending on the actual welding situation, the pressing surface 21 and the first clearance hole 22 can adopt various shapes such as square and circular, and the shapes of the pressing surface 21 and the first clearance hole 22 can be the same or different.

[0037] It should be noted that in actual operation, the battery cell is placed horizontally on the welding platform below the clamping claw 100. The clamping claw 100, under the control of a motor, moves to press the electrode tab and protection plate together before welding. Since the placement orientation of the battery cell is not fixed, the shape and size of the pressing area formed by the clamping claw 100 on the electrode tab surface depends on the positional relationship between the battery cell and the clamping claw 100. (See attached diagram) Figure 1-3 Taking the clamping claw 100 as an example, when the battery cell is placed along the first direction, the opening of the clamping area is located on the side of the tab, reducing the width of the tab; when the battery cell is placed along the second direction, the opening of the clamping area is located at the top or bottom of the tab, reducing the length of the tab. Depending on the placement direction of the battery cell, the same type of clamping claw 100 can form different clamping areas on the battery cell tab.

[0038] Specifically, one end of the tab is connected to the battery cell. This end, constrained by the battery cell, requires less clamping force from the clamping claw 100. The opening of the clamping claw 100 at this end minimizes the area of ​​the clamping zone. When placing the battery cell on the welding platform, the head of the battery cell should face the opening of the first clearance hole 22. Figure 3 As shown, when the first clearance hole 22 opens in the first direction away from the fixing part 10, the battery cell is placed in the first direction with its head facing the opening of the first clearance hole 22. The tab extends in the first direction from the opening of the first clearance hole 22 towards the fixing part 10. At this time, one end of the tab is constrained by the battery cell in the first direction, and the other end is constrained by the pressure claw 100. The welding area is located between the pressing surface 21 of the battery cell and the pressure claw 100. The welding area can be close to the head of the battery cell, and there is no need to maintain a large pressing gap between the welding area and the battery cell. This achieves the purpose of shortening the gap between the welding area and the battery cell and reducing the length of the tab. Furthermore, in some embodiments, the other end of the tab needs to be bent. This placement also allows the bent part of the tab to be pressed by the pressing surface 21. The opening side of the pressure claw 100 is away from the bent part of the tab, which can ensure that the bent part of the tab is flattened and avoid the bent part from warping up and affecting the welding effect.

[0039] In some alternative embodiments, the outer edge with the largest size among the plurality of outer edges is the first outer edge 211, and the first clearance hole 22 is at least partially connected to the first outer edge 211.

[0040] like Figure 4 As shown, the first outer edge 211 has the longest length. The first clearance hole 22 is connected to the first outer edge 211, which can save the largest area. The reduced area of ​​the pressing surface 21 and the tab is equal to the length of the first outer edge 211 multiplied by the wall thickness.

[0041] The following example, using the rectangular pressing surface 21 and the first clearance hole 22, illustrates the influence of the shape and size of the pressure claw 100 on the electrode area.

[0042] In some alternative embodiments, such as Figures 3-4 As shown, the pressing surface 21 also has a second outer edge 212, a third outer edge 213 and a fourth outer edge 214. The first outer edge 211 is opposite to the second outer edge 212 in a first direction, and the third outer edge 213 is opposite to the fourth outer edge 214 in a second direction. The first clearance hole 22 has a first hole wall 221 extending in a second direction, a second hole wall 222 extending in a first direction and a third hole wall 223 extending in a first direction. The first hole wall 221 is close to the second outer edge 212, the second hole wall 222 is close to the third outer edge 213, and the third hole wall 223 is close to the fourth outer edge 214.

[0043] For the rectangular pressing surface 21 and the first clearance hole 22, the pressing surface 21 has four outer edges, of which the longest first outer edge 211 is connected to the first clearance hole 22 to minimize the area of ​​the pressing area. The first clearance hole 22 is open at one end, so the first clearance hole 22 has only three hole walls, and the three outer edges other than the first outer edge 211 correspond one-to-one with the three hole walls.

[0044] like Figure 3-4 As shown, in this embodiment, the first clearance hole 22 can adopt a U-shaped or trapezoidal notch shape, that is, the longest side of the pressing surface 21, i.e., the first outer edge 211, is removed, and the four-sided pressing claw 100 is adjusted to a three-sided pressing claw 100. The opening end of the U-shaped first clearance hole 22 faces the battery cell, so the pressing claw 100 only covers the surface of the electrode tab in three directions, which plays a pressing role on the electrode tab and the protection board. Through experiments, it has been verified that the three-sided pressing claw 100 is designed to press the surface of the battery cell electrode tab with three sides, which can also ensure the flatness of the fit between the battery cell electrode tab and the solder pad during the welding process, thus ensuring the final welding effect.

[0045] Additionally, in some alternative embodiments, such as Figures 5-7 As shown, the dimensions of the third outer edge 213 and the fourth outer edge 214 are L1, and the dimensions of the second hole wall 222 and the third hole wall 223 are L2, with L1 / L2 ≥ 1.2.

[0046] Optionally, the distance between the second outer edge 212 and the first hole wall 221 is D1, where D1 = L2 - L1 ≥ 0.5 mm.

[0047] In this embodiment, the first outer edge 211 is connected to the first clearance hole 22. Therefore, only the second outer edge 212 can restrict the movement and gap between the electrode tab and the protective plate in the first direction. The distance between the second outer edge 212 and the first hole wall 221 determines the magnitude of the pressing force exerted by the pressure claw 100 at that position. The larger the size of the welding area in the first direction, the greater the pressing force required. Therefore, in this embodiment, L1 / L2 is designed to be ≥1.2. The dimensions L1 of the third outer edge 213 and the fourth outer edge 214 represent the size of the pressing area in the first direction, and the dimensions L2 of the second hole wall 222 and the third hole wall 223 represent the size of the welding area in the first direction. The wall thickness of the pressure claw 100 in the first direction increases synchronously with the increase of the welding area and is greater than or equal to 0.5 mm, so that the electrode tab and the protective plate fit tightly together and have high welding quality.

[0048] In addition, the clamping claw 100 is usually symmetrically designed. In the four-sided clamping claw 100, the wall thickness of the first outer edge 211 is equal to the wall thickness of the second outer edge 212. Then, the length that the tab of the three-sided clamping claw 100 can be shortened relative to the four-sided clamping claw 100 is D1.

[0049] Optionally, the distance between the third outer edge 213 and the second hole wall 222 is D2, and the distance between the fourth outer edge 214 and the third hole wall 223 is D3, where D2 ≥ 1 mm and D3 ≥ 1 mm.

[0050] This embodiment uses a three-sided pressure claw 100 with a rectangular first clearance hole 22 as an example to illustrate the influence of the opening direction of the pressure claw 100 and the wall thickness of the outer edge of the pressure claw 100 on the pressing capability. In practical applications, the pressing surface 21 and the rectangular hole can be in various forms such as rectangle, pentagon, circle, and irregular shape. The first clearance hole 22 can be connected to multiple outer edges. The appropriate shape and thickness can be designed by referring to the above method and combining experiments to minimize the area of ​​the electrode tab while meeting the welding quality of the electrode tab and the protection plate, thus saving the host space.

[0051] In addition, in some optional embodiments, the pressure claw 100 further includes a first connecting portion 30 and a second connecting portion 40 connected to each other. The first connecting portion 30 and the second connecting portion 40 are set at a preset angle. The first connecting portion 30 is connected to the fixing portion 10. One end of the second connecting portion 40 is connected to the first connecting portion 30, and the other end is connected to the pressing portion 20. The first connecting portion 30 and the pressing portion 20 are arranged opposite to each other. The first connecting portion 30 is provided with a second clearance hole 31, which is opposite to the first clearance hole 22. The size of the second clearance hole 31 is larger than the size of the first clearance hole 22.

[0052] In this embodiment, the fixing part 10 and the pressing part 20 are connected by the first connecting part 30 and the second connecting part 40. The first connecting part 30 and the second connecting part 40 extend away from the fixing part 10 along the first direction and the second direction, respectively, so that there is a certain distance between the pressing part 20 and the fixing part 10, so as to reserve operating space for placing the workpiece to be welded on the welding platform below.

[0053] Furthermore, the end of the second connecting part 40 connected to the pressing part 20 is inclined toward the first connecting part 30, so that the pressing part 20 is located below the first connecting part 30. In this way, the distance between the pressing part 20 and the fixing part 10 is smaller, and the bending moment generated when the pressing part 20 is subjected to the reaction force applied by the workpiece to be welded is smaller, the deformation of the pressure claw 100 is smaller, the fixing effect of the workpiece to be welded is better, and the electrode tab and the protective plate pad are tightly fitted.

[0054] A second clearance hole 31 is also provided on the first connecting part 30 at a position opposite to the pressing part 20, so that the laser at the top can pass through the second clearance hole 31 and the first clearance hole 22 in sequence to weld on the surface of the electrode tab and the protective plate.

[0055] In addition, in some optional embodiments, the second connecting portion 40 is provided with a third clearance hole 41, which communicates with the first clearance hole 22.

[0056] In this embodiment, the first clearance hole 22 on the pressing part 20 can open in any direction. However, since the second connecting part 40 extends towards the fixing part 10, when the opening of the pressing part 20 faces away from the fixing part 10, the second connecting part 40 will block the first clearance hole 22. Therefore, a third clearance hole 41 is provided on the second connecting part 40 at a position opposite to the first clearance hole 22. The third clearance hole 41 communicates with the first clearance hole 22, so that the first clearance mechanism is exposed to the laser. The laser passes through the second clearance hole 31, the third clearance hole 41 and the first clearance hole 22 in sequence to reach the electrode surface.

[0057] Additionally, in some alternative embodiments, the diameter of the first clearance hole 22 increases along the direction from the pressing surface 21 to away from the pressing surface 21.

[0058] In this embodiment, the first clearance hole 22 is a tapered hole with a smaller bottom and a larger top, which facilitates the laser to pass through from top to bottom.

[0059] Secondly, this utility model also provides a welding device, including any of the pressure claws 100 disclosed in the above embodiments.

[0060] The laser welding station is an important station in the battery pack assembly process, mainly involving the welding of the protection board pads and the cell tabs. The welding claw 100 is the key to ensuring that the two fit tightly together. In this embodiment, while meeting the welding quality requirements such as weld penetration and welding pull, the spacing between the protection board pads and the cell tabs is reduced by changing the structural design of the claw 100, ultimately achieving the goal of reducing the size of the battery pack.

[0061] The three-sided clamping claw 100 in this embodiment has been practically applied and meets the standards: the pressure-sensitive paper test during the equipment debugging stage proves that the clamping effect of the three-sided clamping claw 100 design meets the requirements; the tensile test and melt depth measurement of the welded finished product confirm that the welding effect meets the requirements; the final battery pack finished product also passes the relevant reliability test to prove that the new three-sided clamping claw 100 design has no impact on the battery pack finished product.

[0062] This utility model provides a clamping claw and welding equipment. The clamping claw has a fixing part and a pressing part. The pressing part is provided with a first clearance hole that extends to the pressing surface. The first clearance hole is connected to at least one outer edge of the pressing part. The area of ​​the pressing surface is reduced, thereby reducing the area of ​​the pressing part that is blocked on the tab. The area of ​​the tab used for pressing and the space occupied in the battery are also reduced accordingly, which reduces the battery packaging size. With the main unit compartment space fixed, more internal space can be allocated to the battery cell, increasing the battery capacity and adapting to the development trend of high capacity and small size of batteries.

[0063] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] Although alternative embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the alternative embodiments as well as all changes and modifications falling within the scope of the present invention.

[0065] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0066] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the principle and implementation of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A presser jaw (100), characterized in that, It includes a fixing part (10) and a pressing part (20), the pressing part (20) being connected to the fixing part (10), and the surface of the pressing part (20) for contacting the structure to be pressed is a pressing surface (21), the pressing surface (21) having multiple outer edges; wherein, The pressing part (20) is provided with a first clearance hole (22) extending to the pressing surface (21), and the first clearance hole (22) is connected to at least one portion of the plurality of outer edges.

2. The press jaw (100) according to claim 1, characterized in that The outer edge with the largest size among the plurality of outer edges is the first outer edge (211), and the first clearance hole (22) is at least partially connected to the first outer edge (211).

3. The press jaw (100) according to claim 2, characterized in that The pressing surface (21) further has a second outer edge (212), a third outer edge (213), and a fourth outer edge (214), wherein the first outer edge (211) is opposite to the second outer edge (212) in a first direction, and the third outer edge (213) is opposite to the fourth outer edge (214) in a second direction; wherein, The first clearance hole (22) has a first hole wall (221) extending along the second direction, a second hole wall (222) extending along the first direction, and a third hole wall (223) extending along the first direction. The first hole wall (221) is close to the second outer edge (212), the second hole wall (222) is close to the third outer edge (213), and the third hole wall (223) is close to the fourth outer edge (214).

4. The press jaw (100) according to claim 3, characterized in that The dimensions of the third outer edge (213) and the fourth outer edge (214) are L1, and the dimensions of the second hole wall (222) and the third hole wall (223) are L2, with L1 / L2 ≥ 1.

2.

5. The press jaw (100) according to claim 4, characterized in that The distance between the second outer edge (212) and the first hole wall (221) is D1, where D1 = L2 - L1 ≥ 0.5 mm.

6. The press jaw (100) according to claim 4, characterized in that The distance between the third outer edge (213) and the second hole wall (222) is D2, and the distance between the fourth outer edge (214) and the third hole wall (223) is D3, where D2 ≥ 1 mm and D3 ≥ 1 mm.

7. The press jaw (100) according to claim 1, characterized in that The pressure claw (100) further includes a first connecting part (30) and a second connecting part (40) connected to each other. The first connecting part (30) and the second connecting part (40) are set at a preset angle. The first connecting part (30) is connected to the fixing part (10). One end of the second connecting part (40) is connected to the first connecting part (30), and the other end is connected to the pressing part (20). The first connecting part (30) and the pressing part (20) are arranged opposite to each other. The first connecting part (30) is provided with a second clearance hole (31). The second clearance hole (31) is opposite to the first clearance hole (22), and the size of the second clearance hole (31) is larger than the size of the first clearance hole (22).

8. The press jaw (100) according to claim 7, characterized in that The second connecting part (40) is provided with a third clearance hole (41), which is connected to the first clearance hole (22).

9. The press jaw (100) according to claim 1, characterized in that The first escape hole (22) has a hole diameter that increases in a direction from the press surface (21) to away from the press surface (21).

10. A welding apparatus characterized by, The presser jaw (100) according to any one of claims 1 to 9.

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