Welding tool and battery production equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a welding tool and battery production equipment, the welding tool comprises: a first pressing block extending along a first direction, a first pressure surface being provided with a plurality of mounting grooves at intervals along the first direction; each pressure assembly comprises a second pressing block and an elastic piece, one end, in the second direction, of each elastic piece is connected with the bottom surface of the corresponding mounting groove, and the other end, in the second direction, of each elastic piece is connected with the corresponding second pressing block; according to the utility model, the plurality of pressure assemblies are arranged on the first pressing block, the positions of the pressure assemblies correspond to the positions of the welding spots of the battery cell shell, after the first pressure surface presses the large surface of the shell, the second pressing block presses the welding spots of the shell and the top cover under the combined action of the elastic piece and the first pressing block, and in the subsequent welding process, the welding spots of the shell and the top cover are not damaged. The laser can efficiently and reliably act on the welding spot position, and the phenomenon that an isolating membrane in a battery cell is prone to being burnt out when the top cover is welded is greatly reduced.

Description

Technical Field

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

[0002] A battery typically consists of a casing and battery cells housed inside the casing. As the main component protecting the battery cells, the reliability of the welding during the manufacturing process of the casing directly affects the battery's durability and lifespan. The casing usually includes a housing and a top cover, which are welded together to form a space for housing the battery cells.

[0003] Currently, before the battery cell is placed and the casing and top cover are welded, a clamp is used to clamp the casing and battery cell together, ensuring that the upper edge of the casing fits snugly against the edge of the top cover to guarantee the reliability of the welding process. However, due to unavoidable processing errors during the manufacturing process, the thickness of the casing's side plates fluctuates in the clamping direction. When the existing clamps clamp the casing, the side plates cannot be kept completely flat, resulting in localized depressions and protrusions. This leads to gaps between the upper edge of the casing and the edge of the top cover, which can easily penetrate the gaps during welding and damage the battery cell, thus affecting the battery's lifespan and operational safety. Utility Model Content

[0004] In view of this, the present invention provides a welding fixture and battery production equipment to solve the problem of poor clamping reliability of existing battery clamps.

[0005] In a first aspect, this utility model provides a welding fixture having a vertical first direction and a second direction, comprising: a first pressure block extending along the first direction, the first pressure block having a first pressure surface formed on one end face in the second direction, the first pressure surface having a plurality of mounting grooves spaced apart along the first direction, each mounting groove having a bottom surface; a plurality of pressure components corresponding to the mounting grooves one by one, each pressure component including a second pressure block and an elastic element, one end of each elastic element in the second direction being connected to the bottom surface of the corresponding mounting groove, and the other end of each elastic element in the second direction being connected to the corresponding second pressure block; the end face of each second pressure block facing away from the elastic element forming a second pressure surface, and when the welding fixture is in an idle state, the second pressure surface of the corresponding second pressure block is located on the side of the first pressure surface facing away from the bottom surface.

[0006] Beneficial effects: Multiple pressure components are set on the first pressure block, and the positions of the pressure components correspond to the welding points of the battery cell housing. After the first pressure surface presses the large surface of the housing tightly, the second pressure block, under the combined action of the elastic element and the first pressure block, presses the welding points of the housing and the top cover tightly. Since the housing and the top cover are tightly fitted at the welding point at this time, the laser can be applied to the welding point efficiently and reliably in the subsequent welding process, which greatly reduces the phenomenon of easily burning the internal separator of the battery cell when welding the top cover, and effectively solves the problem of poor clamping reliability of existing battery clamps.

[0007] In one optional embodiment, the pressure assembly further includes a limiting member disposed in a mounting groove. Each mounting groove has a through hole on its bottom surface, which extends along a second direction. The limiting member extends along the second direction, and in the second direction, the end of the limiting member that is connected to the second pressure block is the connecting end, and the end that is away from the second pressure block is the limiting end. The limiting member passes through the through hole, and the limiting member engages with the first pressure block through its limiting end.

[0008] Beneficial effects: The limiting component is simple and reliable, and can effectively limit the maximum distance that the first pressure block extends out of the mounting groove, preventing the second pressure block from coming out of the mounting groove when the welding fixture has not been clamped.

[0009] In one optional embodiment, the through hole includes a first hole segment and a second hole segment. In a second direction, the first hole segment and the second hole segment are arranged sequentially along the direction close to the mounting groove. The diameter of the first hole segment is larger than the diameter of the second hole segment. The side of the second hole segment facing away from the second pressure block forms a limiting surface. The limiting member includes a boss portion, a connecting rod portion, and a screw portion arranged sequentially along the limiting end pointing to the connecting end. The connecting rod portion passes through the through hole and is used to connect the connecting rod portion to the boss portion and the screw portion. The screw portion is threadedly connected to the second pressure block. The limiting end is elastically pressed against the limiting surface by the boss portion itself.

[0010] Beneficial effects: The limiting component and the through hole can achieve limiting fit through their own structure. The limiting fit is simple and reliable, and no additional limiting components are needed. The limiting component is threaded to the second pressure block. The connection method is simple and easy to manufacture and assemble.

[0011] In one alternative embodiment, the elastic element is a wave spring, with the connecting rod passing through the elastic element. One end of the elastic element is elastically pressed against the second pressure block, and the other end is elastically pressed against the wall of the mounting groove.

[0012] Beneficial effects: The compressed spring has a larger compressibility and can provide a greater clamping force, which can make the second pressure block fit more tightly with the target position. In addition, this arrangement of the elastic element can not only restrict the compression direction of the elastic element, but also prevent the elastic element from moving arbitrarily along the radial direction of the connecting rod, thus improving the clamping reliability.

[0013] In one optional embodiment, the wall surface of the mounting groove in the second direction is provided with a positioning groove, one end of the elastic member is elastically pressed against the second pressure block, and the other end is elastically pressed against the inner wall of the positioning groove.

[0014] Beneficial effects: The positioning groove can effectively constrain the position of the elastic element, improving the reliability and stability of the compression process of the elastic element.

[0015] In one optional embodiment, the welding fixture further has a third direction perpendicular to the first direction and the second direction. One end face of the first pressure block in the third direction is a connecting surface. The mounting groove is located at the edge of the first pressure surface near the connecting surface. The mounting groove has a connecting opening on the connecting surface. The second pressure surface has a clearance groove near the edge of the connecting opening. The clearance groove has an opening facing both the first direction and the second direction.

[0016] Beneficial effects: After arranging the second pressure block in this way, it is possible to directly observe whether the second pressure block is in close contact with the pressed part through the position of the connection port. This allows for a more intuitive judgment on whether the welding fixture is pressed in place. In addition, the second pressure surface is provided with a relief groove, which can avoid the weld point position during the welding process, preventing the high temperature during welding from being transmitted to the second pressure block and causing it to deform, thereby improving the stability and safety of the pressing process.

[0017] In one alternative embodiment, the welding fixture further includes a splash guard extending along a first direction, the splash guard being disposed on the communicating surface and blocking the communicating opening, and the end face of the splash guard in a second direction forming a third pressing surface.

[0018] Beneficial effect: The splash guard can protect the second pressure block, preventing molten metal from splashing directly onto the second pressure block during welding.

[0019] In one optional embodiment, the second pressing block has a mirror-symmetric structure, the second pressing block has a symmetry plane, the symmetry plane is parallel to the first direction, and the symmetry plane is parallel to the second direction; or, the second pressing block has an axis of symmetry, the second pressing block has an axis of symmetry, and the axis of symmetry is parallel to the second direction.

[0020] Beneficial effects: When the end of this symmetrical second pressure block near the connection port is deformed or becomes unusable, it can still be used by flipping it along the axis of the second direction, which can improve the flexibility of the second pressure block.

[0021] In one alternative embodiment, the second pressure block has a threaded through hole that extends along a second direction and is threadedly connected to the screw portion.

[0022] Beneficial effects: In the second direction, both ends of the threaded through hole can be threadedly connected to the screw. When the second pressure block deforms or becomes unusable near the pressed part, it can be flipped along the axis of the first direction and can still be used, which can improve the flexibility of the second pressure block.

[0023] Secondly, this utility model also provides a battery production equipment, which includes: a support platform; two of the above-mentioned welding fixtures, which are movable along a second direction and are arranged on the support platform, with the first pressure surfaces of the two welding fixtures arranged opposite to each other, and the space between the two welding fixtures being a clamping space. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional schematic diagram of a welding fixture and a pressure battery according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 A three-dimensional schematic diagram of the welding fixture shown;

[0027] Figure 3 for Figure 2 The diagram shown is a three-dimensional representation of the welding fixture equipped with a splash guard.

[0028] Figure 4 for Figure 2 An exploded view of the welding fixture shown.

[0029] Figure 5 for Figure 2 A three-dimensional schematic diagram of the pressure component of the welding fixture shown;

[0030] Figure 6 for Figure 2 The welding fixture shown is a cross-sectional view cut along the second direction and the third direction into the plane.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. First pressure block; 101. First pressure surface; 102. Mounting groove; 1021. Bottom surface; 103. Through hole; 1031. First hole segment; 1032. Second hole segment; 1033. Limiting surface; 104. Positioning groove; 105. Connecting surface; 106. Connecting opening;

[0033] 2. Pressure assembly; 201. Second pressure block; 2011. Threaded through hole; 202. Elastic element; 203. Second pressure surface; 204. Limiting element; 2041. Connecting end; 2042. Limiting end; 2043. Boss; 2044. Connecting rod; 2045. Screw; 205. Clearance groove;

[0034] 3. Splash guard; 301. Third pressure surface; 4. Battery cell; 401. Housing; 402. Top cover; 403. Pre-welded position;

[0035] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] The following is combined Figures 1 to 6 The following describes embodiments of the present invention.

[0038] According to an embodiment of the present invention, a welding fixture is provided, having a vertical first direction X and a second direction Y, comprising: a first pressure block 1 extending along the first direction X, the first pressure block 1 having a first pressure surface 101 formed on one end face in the second direction Y, the first pressure surface 101 having a plurality of mounting grooves 102 spaced apart along the first direction X, each mounting groove 102 having a bottom surface 1021; a plurality of pressure components 2, corresponding one-to-one with the mounting grooves 102, each pressure component 2 including a second pressure block 201 and an elastic element 202, one end of each elastic element 202 in the second direction Y being connected to the bottom surface 1021 of the corresponding mounting groove 102, and the other end of each elastic element 202 in the second direction Y being connected to the corresponding second pressure block 201; the end face of each second pressure block 201 facing away from the elastic element 202 forming a second pressure surface 203, when the welding fixture is in an idle state, the second pressure surface 203 of the corresponding second pressure block 201 is located on the side of the first pressure surface 101 facing away from the bottom surface 1021.

[0039] Using the welding fixture of this embodiment, multiple pressure components 2 are set on the first pressure block 1. The positions of the pressure components 2 correspond to the welding points of the battery cell housing. When the first pressure surface 101 presses the large surface of the housing tightly, the second pressure block 201, under the combined action of the elastic element 202 and the first pressure block 1, presses the welding point between the housing and the top cover tightly. Since the housing and the top cover are tightly fitted at the welding point at this time, the laser can be applied to the welding point efficiently and reliably in the subsequent welding process, which greatly reduces the phenomenon of easily burning the internal separator of the battery cell when welding the top cover, and effectively solves the problem of poor clamping reliability of existing battery clamps.

[0040] The first direction refers to Figure 2 The direction of the "X" pointed to by the middle arrow, the second direction refers to Figure 2 The direction of the "Y" indicated by the middle arrow, the third direction refers to... Figure 2 The direction of "Z" indicated by the middle arrow is perpendicular to each other in the first direction X, the second direction Y, and the third direction Z. It should be understood that the introduction of the concepts of the first direction X, the second direction Y, and the third direction Z, as well as symmetrical axes, is merely for the convenience of describing spatial relationships and should not be construed as limiting the scope of the embodiments of this application. Therefore, the perpendicular relationship between the first direction X, the second direction Y, and the third direction Z can be interpreted, depending on the actual technical scenario, as the first direction X, the second direction Y, and the third direction Z representing three mutually perpendicular directions in three-dimensional space, or reasonably interpreted as a nearly perpendicular relationship between the first direction X, the second direction Y, and the third direction Z, for example, the included angles between the first direction X, the second direction Y, and the third direction Z are all within the range of 85°-95°… Any technical solution that conforms to the spirit of this utility model or achieves the technical effects described in this utility model can be considered to fall within the scope defined by the appended claims.

[0041] Specifically, during the initial welding stage, the casing and top cover of the battery cell need to be pre-spot welded using a welding laser. The welding fixture of this application can effectively address the issue of laser leakage that is prone to occur during the pre-spot welding process. The second pressure block 201 can be used to press each pre-spot welding position tightly to avoid gaps. However, it should be noted that the welding fixture of this application is not limited to the pre-spot welding process, but can also play a targeted pressing role in the subsequent full welding process.

[0042] In addition, since the welding fixture of this embodiment can effectively eliminate the gap between the weld points of the shell edge and the top cover edge, the welding fixture of this embodiment can also effectively compensate for the processing error of the shell, and the welding process can still be carried out reliably even if the shell has processing error.

[0043] It should be noted that the bottom surface 1021 refers to the wall surface inside the mounting groove 102 along the second direction Y. The shape of the bottom surface 1021 is not strictly limited; it can be a plane or a stepped surface, depending on the requirements.

[0044] Furthermore, the shape of the second pressure block 201 is not limited; it can be a cylinder, prism, hemisphere, etc., as long as it has a second pressure surface 203 and can press the welding point position tightly.

[0045] In one possible implementation, the pressure assembly 2 further includes a limiting member 204, which is disposed in the mounting groove 102. Each mounting groove 102 has a through hole 103 on its bottom surface 1021. The through hole 103 extends along the second direction Y. The limiting member 204 extends along the second direction Y. In the second direction Y, the end of the limiting member 204 that is connected to the second pressure block 201 is the connecting end 2041, and the end that is away from the second pressure block 201 is the limiting end 2042. The limiting member 204 passes through the through hole 103 and is limited to the first pressure block 1 through its own limiting end 2042. The limiting member 204 is simple and reliable and can effectively limit the maximum distance that the first pressure block 1 extends out of the mounting groove 102, thus preventing the second pressure block 201 from coming out of the mounting groove 102 when the welding fixture is not clamped.

[0046] It is understood that, as an alternative implementation, the limiting member 204 can also be a case where the positions of the connecting end 2041 and the limiting end 2042 are interchanged. The limiting member 204 is fixedly connected to the bottom surface 1021 through the connecting end 2041, and its own limiting end 2042 passes through the second pressing block 201, so that the second pressing block 201 cannot be dislodged from itself, thereby limiting the maximum extension distance of the second pressing block 201.

[0047] The limiting mechanism between the limiting component 204 and the first pressure block 1 is not limited; it can be a limiting mechanism through its own structure or a limiting mechanism through fastening components such as bolts, screws, or locating pins. The connection method between the limiting component 204 and the second pressure block 201 is not limited; it can be a threaded connection or a connection through bolts, screws, or locating pins.

[0048] In one possible implementation, such as Figure 6As shown, the through hole 103 includes a first hole section 1031 and a second hole section 1032. In the second direction Y, the first hole section 1031 and the second hole section 1032 are arranged sequentially along the direction close to the mounting groove 102. The diameter of the first hole section 1031 is larger than the diameter of the second hole section 1032. The side of the second hole section 1032 facing away from the second pressure block 201 forms a limiting surface 1033. The limiting member 204 includes a boss portion 2043, a connecting rod portion 2044, and a screw portion 204 arranged sequentially along the limiting end 2042 pointing towards the connecting end 2041. 5. The connecting rod portion 2044 passes through the through hole 103 and is connected to the boss portion 2043 and the screw portion 2045. The screw portion 2045 is threadedly connected to the second pressure block 201. The limiting end 2042 is elastically pressed against the limiting surface 1033 through the boss portion 2043. The limiting member 204 and the through hole 103 can achieve limiting engagement through their own structure. The limiting engagement is simple and reliable, and no additional limiting components are required. The limiting member 204 is threadedly connected to the second pressure block 201. The connection method is simple and easy to manufacture and assemble.

[0049] Specifically, such as Figure 6 As shown, the end where the limiting end 2042 is located is the boss portion 2043. The boss portion 2043 abuts against the limiting surface 1033 through its own stepped surface. The direction of the force between the two is along the second direction Y. The boss portion 2043 applies a force to the limiting surface 1033 in the direction toward the second pressing block 201, while the limiting surface 1033 is based on the reaction force of the boss portion 2043 in the direction away from the second pressing block 201.

[0050] In one possible implementation, the elastic element 202 is a wave spring, and the connecting rod portion 2044 passes through the elastic element 202. One end of the elastic element 202 is elastically pressed against the second pressure block 201, and the other end is elastically pressed against the wall of the mounting groove 102. The wave spring has a larger compressibility and can provide a larger clamping force, which can make the second pressure block 201 fit more tightly against the target position. In addition, this arrangement of the elastic element 202 can not only limit the compression direction of the elastic element 202, but also prevent the elastic element 202 from moving arbitrarily along the radial direction of the connecting rod portion 2044, thereby improving the clamping reliability.

[0051] It should be noted that the type of elastic element 202 is not strictly limited here. It can be replaced with other types of springs such as rubber springs, spiral springs, and shape memory alloy springs, as long as the clamping function can be achieved.

[0052] Specifically, such as Figure 6As shown, the elastic element 202 is elastically pressed against the bottom surface 1021 of the mounting groove 102. The direction of the force exerted by the elastic element 202 and the second pressure block 201 at their mating positions is along the second direction Y. The direction of the force exerted by the elastic element 202 on the second pressure block 201 is away from the bottom surface 1021.

[0053] In one possible implementation, the wall surface of the mounting groove 102 in the second direction Y is provided with a positioning groove 104. One end of the elastic member 202 is elastically pressed against the second pressure block 201, and the other end is elastically pressed against the inner wall of the positioning groove 104. The positioning groove 104 can effectively constrain the position of the elastic member 202 and improve the reliability and stability of the compression process of the elastic member 202.

[0054] It is understood that, as an alternative implementation, the positioning groove 104 may not be provided, and the elastic member 202 may be directly and elastically pressed against the wall surface of the mounting groove 102 in the second direction Y.

[0055] Specifically, such as Figure 6 As shown, the positioning groove 104 is a groove structure set on the bottom surface 1021. The direction of the force between the elastic member 202 and the positioning groove 104 at the mating position is along the second direction Y. The direction of the force applied by the elastic member 202 to the inner wall of the positioning groove 104 is away from the second pressure block 201.

[0056] In one possible implementation, the welding fixture also has a third direction Z perpendicular to the first direction X and the second direction Y. One end face of the first pressure block 1 in the third direction Z is a connecting surface 105. The mounting groove 102 is located at the edge of the first pressure surface 101 near the connecting surface 105. The mounting groove 102 has a connecting opening 106 on the connecting surface 105. The second pressure surface 203 has a clearance groove 205 near the edge of the connecting opening 106. The clearance groove 205 has an opening facing both the first direction X and the second direction Y. After the second pressure block 201 is arranged in this way, the position of the connecting opening 106 can be used to directly observe whether the second pressure block 201 is in close contact with the pressed part, and it is possible to more intuitively judge whether the welding fixture is pressed in place. In addition, the clearance groove 205 on the second pressure surface 203 can avoid the weld point during the welding process, preventing the high temperature during welding from being transmitted to the second pressure block 201 and causing it to deform, thereby improving the stability and safety of the pressing process.

[0057] It should be noted that, for example Figure 2As shown, since the clearance groove 205 is small in size, setting the clearance groove 205 will not affect the clamping ability of the second pressure block 201. The second pressure block 201 avoids direct contact with the high temperature position of the welding point, which can improve the service life of the second pressure block 201 during the use of the welding fixture.

[0058] In one possible implementation, the welding fixture further includes a splash guard 3 extending along the first direction X. The splash guard 3 is disposed on the connecting surface 105 and blocks the connecting opening 106. The end face of the splash guard 3 in the second direction Y forms a third pressing surface 301. The splash guard 3 can protect the second pressing block 201 and prevent molten metal splashed during the welding process from falling directly onto the second pressing block 201.

[0059] Specifically, the structure of the splash guard 3 is not limited. It can be multiple smaller plates that only block the connecting opening 106, or it can be a larger plate that covers the entire connecting surface 105. The choice can be made flexibly according to the requirements.

[0060] Preferably, such as Figure 3 As shown, the splash guard 3 covers the entire connecting surface 105 and simultaneously blocks each connecting opening 106.

[0061] In one possible implementation, the second pressing block 201 has a mirror-symmetric structure with a symmetry plane parallel to the first direction X and the second direction Y; or, the second pressing block 201 has an axisymmetric structure with a symmetry axis parallel to the second direction Y. In this symmetrical form, when the end of the second pressing block 201 near the communication port 106 is deformed or becomes unusable, it can still be used by flipping the second pressing block 201 along the axis of the second direction Y, thereby improving the flexibility of the second pressing block 201.

[0062] Specifically, such as Figure 2 and Figure 4 As shown, the second pressing block 201 is a block structure arranged in an H shape, and the clearance groove 205 is a through groove extending along the second direction Y. This type of groove is easier to process and can also reduce the weight of the second pressing block 201.

[0063] In one possible implementation, the second pressure block 201 has a threaded through hole 2011 extending along the second direction Y. The threaded through hole 2011 is threadedly connected to the screw part 2045. In the second direction Y, both ends of the threaded through hole 2011 can be threadedly connected to the screw part 2045. When the second pressure block 201 deforms or becomes unusable near the pressed part, it can be flipped along the axis of the first direction X and can still be used, which can improve the flexibility of the second pressure block 201.

[0064] According to an embodiment of the present invention, another aspect provides a battery production equipment, which includes: a support platform and two welding fixtures, the two welding fixtures being movable along a second direction Y and disposed on the support platform, the first pressure surfaces 101 of the two welding fixtures being disposed opposite to each other, and the space between the two welding fixtures being a clamping space.

[0065] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A welding fixture having a first perpendicular direction (X) and a second perpendicular direction (Y), characterized in that, include: The first pressure block (1) extends along the first direction (X). One end face of the first pressure block (1) in the second direction (Y) forms a first pressure surface (101). Multiple mounting grooves (102) are provided on the first pressure surface (101) at intervals along the first direction (X). Each mounting groove (102) has a bottom surface (1021). Multiple pressure components (2) are provided one-to-one with the mounting groove (102). Each pressure component (2) includes a second pressure block (201) and an elastic element (202). One end of each elastic element (202) in the second direction (Y) is connected to the bottom surface (1021) of the corresponding mounting groove (102), and the other end of each elastic element (202) in the second direction (Y) is connected to the corresponding second pressure block (201). The end face of each second pressure block (201) facing away from the elastic element (202) forms a second pressure surface (203). When the welding fixture is in an idle state, the second pressure surface (203) of the corresponding second pressure block (201) is located on the side of the first pressure surface (101) facing away from the bottom surface (1021).

2. The welding fixture according to claim 1, characterized in that, The pressure assembly (2) further includes a limiting member (204), which is disposed in the mounting groove (102). The bottom surface (1021) of each mounting groove (102) is provided with a through hole (103). The through hole (103) extends along the second direction (Y). The limiting member (204) extends along the second direction (Y). In the second direction (Y), the end of the limiting member (204) connected to the second pressure block (201) is the connecting end (2041), and the end away from the second pressure block (201) is the limiting end (2042). The limiting member (204) passes through the through hole (103), and the limiting member (204) is limited and cooperates with the first pressure block (1) through its own limiting end (2042).

3. The welding fixture according to claim 2, characterized in that, The through hole (103) includes a first hole segment (1031) and a second hole segment (1032). In the second direction (Y), the first hole segment (1031) and the second hole segment (1032) are arranged sequentially along the direction close to the mounting groove (102). The diameter of the first hole segment (1031) is larger than the diameter of the second hole segment (1032). The side of the second hole segment (1032) facing away from the second pressure block (201) forms a limiting surface (1033). The limiting member (204) includes a limiting end ( 2042) Pointing to the connecting end (2041), a boss (2043), a connecting rod (2044), and a screw (2045) are sequentially arranged. The connecting rod (2044) passes through the through hole (103) and connects the boss (2043) and the screw (2045). The screw (2045) is threadedly connected to the second pressure block (201). The limiting end (2042) is elastically pressed against the limiting surface (1033) through the boss (2043).

4. The welding fixture according to claim 3, characterized in that, The elastic element (202) is a wave spring, and the connecting rod (2044) passes through the elastic element (202). One end of the elastic element (202) is elastically pressed against the second pressure block (201), and the other end is elastically pressed against the wall of the mounting groove (102).

5. The welding fixture according to claim 2, characterized in that, The mounting groove (102) has a positioning groove (104) on the wall surface in the second direction (Y). One end of the elastic member (202) is elastically pressed against the second pressure block (201), and the other end is elastically pressed against the inner wall of the positioning groove (104).

6. The welding fixture according to any one of claims 1 to 5, characterized in that, The welding fixture also has a third direction (Z) perpendicular to the first direction (X) and the second direction (Y). The first pressure block (1) has a connecting surface (105) on one end face of the third direction (Z). The mounting groove (102) is located at the edge of the first pressure surface (101) near the connecting surface (105). The mounting groove (102) has a connecting opening (106) on the connecting surface (105). The second pressure surface (203) has a clearance groove (205) near the edge of the connecting opening (106). The clearance groove (205) has an opening facing both the first direction (X) and the second direction (Y).

7. The welding fixture according to claim 6, characterized in that, The welding fixture also includes a splash guard (3) extending along the first direction (X), the splash guard (3) being disposed on the communicating surface (105) and blocking the communicating opening (106), and the end face of the splash guard (3) in the second direction (Y) forming a third pressing surface (301).

8. The welding fixture according to claim 6, characterized in that, The second pressing block (201) has a mirror-symmetric structure and a symmetry plane, which is parallel to the first direction (X) and the second direction (Y); or, the second pressing block (201) has an axisymmetric structure and a symmetry axis, which is parallel to the second direction (Y).

9. The welding fixture according to claim 3 or 4, characterized in that, The second pressure block (201) has a threaded through hole (2011) that extends along the second direction (Y) and is threadedly connected to the screw part (2045).

10. A battery manufacturing apparatus, characterized in that, include: Support platform; The welding fixture according to any one of claims 1 to 9 is movable along the second direction (Y) and is disposed on the support platform. The first pressure surfaces (101) of the two welding fixtures are disposed opposite to each other, and the space between the two welding fixtures is a clamping space.

Images