WO2024108818A1 - Welding tool and welding apparatus - Google Patents

Abstract

Provided in the present application are a welding tool and a welding apparatus. The welding tool comprises a mounting base, which is internally provided with a mounting hole; a tool body, which has one end movably accommodated in the mounting hole in a first direction, and which is internally provided with a welding channel for implementing welding; and an elastic member, which is sleeved on a peripheral side of the tool body, wherein two ends of the elastic member abut against the mounting base and the tool body, respectively, and the deformation direction of the elastic member is the same as the first direction. The welding tool and the welding apparatus can improve the welding quality and avoid a cold joint.

Description

Welding tools and equipment

cross reference

This application claims priority to the Chinese patent application filed with the China Patent Office on November 22, 2022, with application number 202223097185.1 and invention name “Welding tooling and welding equipment”, the entire contents of which are incorporated by reference into this application.

Technical Field

The present application relates to the field of battery production, and in particular to a welding tool and welding equipment.

Background technique

Energy conservation and emission reduction are the key to the sustainable development of automobiles. Electric vehicles have attracted widespread attention due to their green and environmentally friendly advantages. Power batteries are an important component of electric vehicles.

The battery consists of a box and multiple battery cells contained in the box. The battery cells are assembled into electrode assemblies (bare cells) by winding or laminating positive electrode sheets, negative electrode sheets and separators, which are then loaded into a casing and injected with electrolyte. In the production process of the battery, the multiple battery cells contained in the box need to be welded to the busbar so that the multiple battery cells can be connected in series or in parallel through the busbar. However, in the existing battery production process, there is a problem of poor welding quality between the battery cells and the busbar, which reduces the production quality and yield of the battery.

Summary of the invention

In view of this, an embodiment of the present application provides a welding tool and a welding device, which can improve the welding quality.

The embodiment of the first aspect of the present application provides a welding tool, comprising:

A mounting seat, wherein a mounting hole is provided in the mounting seat;

A tool body, one end of which is movably accommodated in the mounting hole along a first direction, and a welding channel for welding is provided in the tool body;

An elastic member is sleeved on the peripheral side of the tool body, two ends of the elastic member are respectively abutted against the mounting seat and the tool body, and the deformation direction of the elastic member is the same as the first direction.

The welding jig includes a mounting seat, a jig body and an elastic member. One end of the jig body is used to press against the workpiece to be welded, and the other end is used to press against the elastic member. The elastic member can provide elastic force for the jig body when the jig body is pressed against the workpiece to be welded, thereby ensuring that the jig body is pressed against the workpiece to be welded, so as to improve the welding quality of the workpiece to be welded. At the same time, since the elastic member is sleeved on the peripheral side of the jig body, the elastic member can provide a balanced elastic force for the jig body, avoiding the jig body from being unable to return to its original position due to abnormal return of the elastic member, resulting in a cold weld. Therefore, the welding jig can make the jig body rebound smoothly, avoid the problem of cold welds, optimize the welding effect, and improve the production quality and yield of the battery.

In some embodiments, the welding tool further includes a clamping piece, the clamping piece is connected to one side of the mounting seat and a guide hole is formed on the clamping piece, and the tool body is inserted into the guide hole.

By adopting the above technical solution, the tool body is inserted into the guide hole, so that the guide hole can be used to guide the tool body, thereby preventing the tool body from being offset during movement and improving the movement accuracy of the tool body.

In some embodiments, the clamping member is detachably connected to the mounting seat, and the tooling body is movably disposed in the guide hole along the first direction and can be clamped on the clamping member.

By adopting the above technical solution, the clamping piece can prevent the tool body from falling off the mounting seat; the welding tool is easy to assemble, disassemble and maintain, thereby preventing the welding channel of the tool body from blocking light due to residual particles; The tool body is installed on the mounting seat through the clamping piece, and the tool body does not need to directly contact the bolt, thereby reducing the risk of the tool body being unable to rebound into place due to the stuck state caused by the abnormal bolt when the tool body rebounds.

In some embodiments, a holding protrusion is provided on the outer peripheral surface of the tooling body, and the two ends of the elastic member are respectively held against the inner wall of the mounting hole and the holding protrusion, and the end of the holding protrusion facing away from the elastic member can be held against the holding member or be spaced apart from the holding member.

By arranging a holding protrusion on the tool body, the elastic member can be installed and can also be pressed against the holding member to limit the tool body. The tool body has a simple structure and is easy to implement.

In some embodiments, the clamping member is provided with a plurality of limiting protrusions on the peripheral side of the guide hole for limiting and clamping the clamping protrusion.

By arranging a limiting protrusion on the clamping piece, the limiting protrusion can clamp and limit the clamping protrusion, thereby preventing the tool body from being offset.

In some embodiments, the tooling body includes a connecting seat and a welding nozzle connected to each other, the welding channel runs through the connecting seat and the welding nozzle, the connecting seat is a cylindrical structure and the elastic member is sleeved on the connecting seat, and the welding nozzle is used to press the workpiece to be welded.

By adopting the above technical solution, the tool body includes a connecting seat and a welding nozzle. The connecting seat is a columnar structure, which is convenient for both installing the elastic part and sliding in the installation hole, so that the tool body moves smoothly in the first direction.

In some embodiments, a first limiting portion is provided on the connecting seat, and the first limiting portion is movably disposed in the guide hole, and the first limiting portion is used to limit the rotation of the tooling body.

By providing the first limiting portion, the rotation of the tool body can be limited, thereby avoiding the polarization caused by the rotation of the tool body and causing cold welding.

In some embodiments, the inner surface of the guide hole is provided with a second limiting portion, and the first limiting portion The first and second limiting portions are respectively a first plane formed on the peripheral side wall of the connecting seat and a second plane formed on the hole wall of the guide hole, and the first plane and the second plane are arranged opposite to each other and parallel to each other.

By adopting the above technical solution, the first limiting part cooperates with the second limiting part to prevent the tooling body from rotating, and the first limiting part and the second limiting part are both flat, with a simple structure, easy to implement and low cost.

In some embodiments, the clamping member includes two clamping blocks arranged opposite to each other, the two clamping blocks are connected to each other and together form the guide hole, and the clamping blocks are fixedly connected to the mounting seat by fasteners.

By arranging the clamping member as two butted clamping blocks, the installation and removal of the clamping member are facilitated, thereby improving the convenience of use.

In some embodiments, the welding tool further includes a gas supply joint connected to the tool body, the gas supply joint is communicated with the welding channel, and the gas supply joint is used to introduce protective gas into the welding channel.

By introducing shielding gas into the welding channel, the welding quality of the weld can be improved, the width of the weld heating zone can be reduced, and material oxidation can be avoided.

In some embodiments, the welding tool further includes a dust removal pipe connected to the tool body, and the dust removal pipe is communicated with the welding channel.

By setting up a dust removal pipe, during the welding process, the dust removal pipe is used to absorb the smoke generated during welding to avoid blocking the light. In addition, dust removal is conducive to the protective gas entering the welding channel, thereby improving the welding quality of the weld.

The embodiment of the second aspect of the present application provides a welding device, comprising:

The welding tool as described in the first aspect; and

The welder is arranged above the welding tool.

The above-mentioned welding equipment includes the welding tooling provided in the first aspect, which also has the advantage of improving welding quality.

The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

FIG1 is a perspective schematic diagram of a welding tool provided in one embodiment of the present application;

FIG2 is a top view of the welding tool shown in FIG1 ;

FIG3 is a cross-sectional view of the welding tool shown in FIG2 along line A-A;

FIG4 is a perspective exploded schematic diagram of the welding tool shown in FIG1 ;

FIG. 5 is a three-dimensional schematic diagram of a clamping member in the welding tool shown in FIG. 4 .

The meanings of the marks in the figure are:
100, welding tool; 10, mounting seat; 101, mounting hole; 102, through hole; 103, step surface;
20. Tool body; 201. Welding channel; 21. Connecting seat; 211. Clamping protrusion; 212. First limit 2. welding nozzle; 23. mounting portion; 30. elastic member; 40. clamping member; 401. guide hole; 402. second limiting portion; 41. clamping block; 411. connecting hole; 412. limiting protrusion; 50. fastener; 60. air supply connector; 70. dust removal pipe; 71. first tube body; 72. second tube body.

Detailed ways

The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.

In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

In the present application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., and the present application embodiment does not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the present application embodiment does not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which are not limited in the embodiments of the present application.

The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells or multiple battery modules. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

In the battery, the battery also includes a busbar, which is used to realize the electrical connection between multiple battery cells. That is to say, multiple battery cells are welded to the busbar, so that multiple battery cells can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in mixed connection, and then the whole composed of multiple battery cells is contained in the battery box. Among them, the battery cell has a pole welded to the busbar, and the pole plays the role of outputting or inputting the electric energy of the battery cell.

Energy conservation and emission reduction are the key to the sustainable development of automobiles. Electric vehicles have attracted widespread attention due to their green and environmentally friendly advantages. Power batteries are an important component of electric vehicles.

The battery consists of a box and multiple battery cells contained in the box. The battery cells are assembled into electrode assemblies (bare cells) by winding or laminating positive electrode sheets, negative electrode sheets and separators, which are then loaded into a casing and injected with electrolyte. In the production process of the battery, the multiple battery cells contained in the box need to be welded with the busbar components so that the multiple battery cells are connected in series or in parallel through the busbar components.

In the existing battery production process, the busbar component needs to be placed against the poles of multiple battery cells to complete the welding work between the busbar component and the poles of multiple battery cells at the same time. However, due to the difference in the height of the poles of each battery cell, it is very easy for the busbar component to collide with the poles of the battery cell. The phenomenon of insufficient contact leads to cold welding or empty welding between the busbar component and the pole of the battery cell. Therefore, there is a problem of poor welding quality between the battery cell and the busbar component, which reduces the production quality and yield of the battery.

In order to solve the problem of poor welding quality, the embodiment of the present application designs a welding tool and welding equipment. The welding tool includes a mounting seat, a tool body and an elastic part. One end of the tool body is used to press against the workpiece to be welded, and the other end is pressed against the elastic part. The elastic part can provide elastic force for the tool body when the tool body is pressed against the workpiece to be welded, thereby ensuring that the tool body is pressed against the workpiece to be welded, so as to improve the welding quality of the workpiece to be welded; the elastic part is sleeved on the tool body, which can provide balanced elastic force for the tool body, so as to avoid the tool body being unable to return to its original position due to abnormal return of the elastic part, thereby causing cold welding.

Some embodiments of the first aspect of the present application provide a welding tool, which is used to hold a workpiece to be welded, so as to position the workpiece to be welded during welding and prevent the workpiece to be welded from shifting.

1 to 3, the welding tool 100 includes a mounting seat 10, a tool body 20 and an elastic member 30. The mounting seat 10 is provided with a mounting hole 101; one end of the tool body 20 is movably accommodated in the mounting hole 101 along a first direction X, and a welding channel 201 for welding is provided in the tool body 20; the elastic member 30 is sleeved on the peripheral side of the tool body 20, and the two ends of the elastic member 30 are respectively abutted against the mounting seat 10 and the tool body 20, and the deformation direction of the elastic member 30 is the same as the first direction X.

The mounting seat 10 is used to mount the tool body 20 and the elastic member 30 , and the mounting seat 10 can connect the tool body 20 to an external structure. The mounting hole 101 is a through hole that passes through the mounting seat 10 to accommodate one end of the tool body 20 and the elastic member 30 .

One end of the tool body 20 is movably received in the mounting hole 101 along the first direction X, and the other end is used to press against the workpiece to be welded, that is, the tool body 20 is only partially received in the mounting hole 101. X is the thickness direction of the mounting seat 10 , and is also the depth direction of the mounting hole 101 .

The tool body 20 can be a metal part, which has good rigidity and strength and can withstand the high temperature generated during welding. For example, the tool body 20 is a welding copper nozzle, but it is not limited to this. In addition, the tool body 20 can be a combination or an integrated structure, which is not limited in this application.

A welding channel 201 for welding is provided in the tool body 20 , and the welding channel 201 runs through opposite sides of the tool body 20 along the first direction X. The welding channel 201 can be a laser channel for laser welding of the workpiece to be welded; the welding channel 201 can also be inserted with a welder.

The tool body 20 is elastically connected to the mounting seat 10 through an elastic member 30, and the deformation direction of the elastic member 30 is the same as the first direction X. When the elastic member 30 is elastically deformed, the tool body 20 can move relative to the mounting seat 10 in the first direction X to adjust the distance between the end of the tool body 20 for pressing the workpiece and the mounting seat 10. The elastic member 30 can be a spring, but is not limited thereto. For example, the elastic member 30 can also be an element with better elasticity, such as elastic foam.

The elastic member 30 can be accommodated in the mounting hole 101, or can be arranged outside the mounting hole 101. For example, the elastic member 30 is accommodated in the mounting hole 101, and the two ends of the elastic member 30 can respectively abut against the inner wall of the mounting hole 101 and the peripheral side wall of the tooling body 20; or, the elastic member 30 is arranged outside the mounting hole, and the elastic member 30 abuts against the surface of the mounting seat 10 and the peripheral side wall of the tooling body 20.

The welding tool 100 includes a mounting seat 10, a tool body 20 and an elastic member 30. One end of the tool body 20 is used to press against the workpiece to be welded, and the other end is held against the elastic member 30. The elastic member 30 can provide elastic force for the tool body 20 when the tool body 20 is pressed against the workpiece to be welded, thereby ensuring that the tool body 20 is pressed against the workpiece to be welded, so as to improve the welding quality of the workpiece to be welded. At the same time, since the elastic member 30 is sleeved on the side of the tool body 20, the elastic member 30 can provide a balanced elastic force for the movement of the tool body 20 in the mounting hole 101. Compared with the method of setting multiple independent elastic members, if there is one elastic member Abnormal resetting will cause abnormal return of the tooling body 20, and the elastic deformation of multiple elastic parts may be inconsistent; the elastic part 30 in the embodiment of the present application as a whole can avoid the tooling body 20 being unable to return due to abnormal return of the elastic part 30, causing a cold weld. Therefore, the above welding tool 100 can make the tooling body 20 rebound smoothly, avoid the problem of cold welds, optimize the welding effect, and improve the production quality and yield of the battery.

Please refer to FIG. 1 to FIG. 5 . In some embodiments, the welding tool 100 further includes a clamping member 40 . The clamping member 40 is connected to one side of the mounting seat 10 and has a guide hole 401 formed therein. The tool body 20 is inserted into the guide hole 401 .

The guide hole 401 is a through hole that penetrates through two opposite ends of the clamping member 40 along the first direction X, and is used to guide the movement of the tooling body 20 .

The clamping member 40 can be fixedly connected to the mounting seat 10, and the tooling body 20 can be movably inserted into the guide hole 401; the clamping member 40 can also be slidably connected to the mounting seat 10 along the first direction, and the tooling body 20 and the clamping member 40 are fixedly connected and move synchronously. At this time, the guide hole 401 in the clamping member 40 can still guide the tooling body 20 to prevent the tooling body 20 from being displaced when contacting the workpiece to be welded.

By adopting the above technical solution, the tool body 20 is inserted into the guide hole 401 , so that the guide hole 401 can be used to guide the tool body 20 , thereby preventing the tool body 20 from being displaced during movement, and improving the movement accuracy of the tool body 20 .

In some embodiments, the clamping member 40 is detachably connected to the mounting seat 10 , the tool body 20 is movably disposed in the guide hole 401 along the first direction X, and the tool body 20 can be clamped on the clamping member 40 .

The tool body 20 can abut against the surface of the clamping member 40 facing the mounting seat 10 , or can be engaged with the clamping member 40 through the clamping portion, both of which can achieve clamping the tool body 20 on the clamping member 40 .

The clamping member 40 can be detachably connected to the mounting base 10 by means of a fastener 50 such as a bolt, so that the clamping member 40 can be connected to the mounting seat 10, and at this time, the tool body 20 can move relative to the clamping member 40 along the first direction X. When the elastic member 30 is compressed, the tool body 20 will not be clamped by the clamping member 40, so that the tool body 20 can move along the first direction; when the elastic member 30 is stretched, the tool body 20 can be clamped by the clamping member 40, so that the clamping member 40 can limit the movement stroke of the tool body 20 to prevent the tool body 20 from falling off.

By adopting the above technical solution, the clamping member 40 can not only guide the movement of the tool body 20 through the guide hole 401, but also limit the movement stroke of the tool body 20 to prevent the tool body 20 from falling off the mounting seat 10. At the same time, since the clamping member 40 is detachably connected to the mounting seat 10, when the tool body 20 needs to be cleaned, the clamping member 40 can be removed from the mounting seat 10 first, and then the tool body 20 can be removed. The above welding tool 100 is easy to assemble, disassemble and maintain, thereby avoiding the welding channel 201 of the tool body 20 from blocking light due to residual particles. In addition, since the tool body 20 is installed on the mounting seat 10 through the clamping member 40, the tool body 20 does not need to directly contact the bolt, reducing the risk of the tool body 20 being unable to rebound to its place due to the abnormal state of the bolt when the tool body 20 rebounds.

In some embodiments, a retaining protrusion 211 is provided on the outer peripheral surface of the tooling body 20, and the two ends of the elastic member 30 are respectively abutted against the inner wall of the mounting hole 101 and the retaining protrusion 211, and the end of the retaining protrusion 211 facing away from the elastic member 30 can be abutted against the retaining member 40 or be spaced apart from the retaining member 40.

A clamping protrusion 211 is provided on the outer peripheral surface of the tool body 20 . The number of the clamping protrusion 211 can be one or more, and the present application does not limit the shape of the clamping protrusion 211 .

The elastic member 30 can be completely or partially received in the mounting hole 101. The two ends of the elastic member 30 are respectively held against the retaining protrusion 211 and the mounting seat 10, so that the tool body 20 is elastically connected to the mounting seat 10. In some embodiments, the inner wall of the mounting hole 101 is provided with a step surface 103, so that the two ends of the elastic member 30 are respectively held against the retaining protrusion 211 and the step surface 103. It can be understood that the step surface 103 It may also be replaced by other structures such as a fixing ring that can abut against the elastic member 30 .

When the elastic member 30 is not compressed, one end of the holding protrusion 211 abuts against the elastic member 30 and the other end abuts against the holding member 40, that is, the holding protrusion 211 abuts against the periphery of the mounting hole 101; when the tooling body 20 is pressed against the workpiece to be welded, the tooling body 20 moves toward the mounting seat 10 and the elastic member 30 is compressed, at which time the holding protrusion 211 is spaced apart from the holding member 40.

By providing the clamping protrusion 211 on the tool body 20 , the elastic member 30 can be installed and can also be pressed against the clamping member 40 to limit the tool body 20 . The tool body 20 has a simple structure and is easy to implement.

In some embodiments, the tooling body 20 includes a connecting seat 21 and a welding nozzle 22 connected to each other, and the welding channel 201 runs through the connecting seat 21 and the welding nozzle 22; the connecting seat 21 is a cylindrical structure and the elastic member 30 is sleeved on the connecting seat 21, and the welding nozzle 22 is used to press the workpiece to be welded.

In some embodiments, the connection seat 21 is cylindrical, so as to facilitate the installation of the annular elastic member 30; one end of the connection seat 21 is received in the mounting hole 101, and accordingly, the mounting hole 101 is also a circular hole, so as to facilitate the connection seat 21 to slide in the mounting hole 101. The connection seat 21 can also be an elliptical column, a hexagonal column or other cylindrical structures.

The welding nozzle 22 is disposed outside the mounting hole 101 , and the end portion facing away from the connecting seat 21 is used to press against the workpiece to be welded.

The holding protrusion 211 is disposed around the outer circumference of the connecting seat 21 . The holding protrusion 211 may be annular to facilitate contact with the elastic member 30 .

By adopting the above technical solution, the tool body 20 includes a connecting seat 21 and a welding nozzle 22. The connecting seat 21 is a cylindrical structure, which is convenient for both mounting the elastic member 30 and sliding in the mounting hole 101, so that the tool body 20 moves smoothly in the first direction X.

In some embodiments, the connection base 21 is further provided with a first limiting portion 212, which can The first limiting portion 212 is movably disposed in the guide hole 401 and is used to limit the rotation of the tool body 20 .

Specifically, the first limiting portion 212 is located on the side of the holding protrusion 211 away from the elastic member 30, and the first limiting portion 212 is movably arranged in the guide hole 401 of the holding member 40. The first limiting portion 212 can cooperate with the guide hole 401 to achieve the effect of limiting the rotation of the tooling body 20, ensuring that the movement of the connecting seat 21 is only up and down movement along the first direction X, and does not rotate. The first limiting portion 212 and the guide hole 401 are not unique in their cooperation mode. For example, the first limiting portion 212 can be slidably connected to the hole wall of the guide hole 401.

Since the connecting seat 21 is cylindrical, it may rotate during the movement of the tool body 20. By providing the first limiting portion 212, the rotation of the tool body 20 can be limited, thereby avoiding polarization caused by the rotation of the tool body 20 and causing cold solder joints.

In some embodiments, a second limiting portion 402 is provided on the inner surface of the guide hole 401, and the first limiting portion 212 and the second limiting portion 402 are respectively a first plane formed on the peripheral side wall of the connecting seat 21 and a second plane formed on the hole wall of the guide hole 401, and the first plane and the second plane are arranged opposite to each other and parallel to each other.

The guide hole 401 is adapted to the shape of the connection seat 21 and is generally circular. In order to limit the rotation of the tooling body 20, the second limit portion 402 on the inner surface of the guide hole 401 and the first limit portion 212 on the connection seat 21 are both planes, and the first plane and the second plane are arranged oppositely and parallel to each other to limit the rotation of the connection seat 21, that is, to limit the rotation of the tooling body 20, so that the tooling body 20 floats up and down more smoothly.

By adopting the above technical solution, the first limiting portion 212 cooperates with the second limiting portion 402 to prevent the tool body 20 from rotating, and the first limiting portion 212 and the second limiting portion 402 are both flat, with a simple structure, easy to implement, and low cost.

The structure of the first limiting portion 212 is not limited to a plane. For example, in other embodiments, one of the first limiting portion 212 and the second limiting portion 402 may be a slide rail and the other may be a slide groove, and both the slide rail and the slide groove extend along the first direction X, which can also play the role of limiting the rotation of the tooling body 20.

In some embodiments, the clamping member 40 is provided with a plurality of limiting protrusions 412 on the peripheral side of the guide hole 401 for limiting and clamping the clamping protrusion 211 .

Specifically, the guide hole 401 is opened in the middle of the clamping member 40. Since a plurality of limiting protrusions 412 are arranged around the guide hole 401, the middle of the clamping member 40 is equivalent to forming a clamping groove. The clamping protrusion 211 can abut against the middle of the clamping member 40 and is arranged between the plurality of limiting protrusions 412.

By providing the limiting protrusion 412 on the clamping member 40 , the limiting protrusion 412 can clamp and limit the clamping protrusion 211 , thereby preventing the tool body 20 from being offset.

As shown in FIG. 1 and FIG. 5 , in some embodiments, the clamping member 40 includes two clamping blocks 41 disposed opposite to each other. The two clamping blocks 41 are connected to each other and together form a guide hole 401 . The clamping blocks 41 are fixedly connected to the mounting seat 10 via fasteners 50 .

In some embodiments, each holding block 41 is provided with a half hole, and the half holes of the two holding holes together form a guide hole 401. The holding block 41 is provided with a connecting hole 411, and the holding block 41 is detachably connected to the mounting seat 10 through a fastener 50 that penetrates the mounting seat 10 and the connecting hole 411. The fastener 50 can be a bolt.

During assembly, the elastic member 30 is first sleeved on the tool body 20 , and then the two clamping blocks 41 are placed on both sides of the tool body 20 and fixed on the mounting seat 10 by the fasteners 50 .

Since the clamping member 40 is used to clamp the tooling body 20 and install the tooling body 20 on the mounting seat 10, by configuring the clamping member 40 as two butting clamping blocks 41, the installation and removal of the clamping member 40 are facilitated, thereby improving the convenience of use.

In other embodiments, the tool body 20 is fixedly connected to the clamping member 40 , and the clamping member 40 is slidably connected to the mounting seat 10 .

Specifically, one end of the connecting member is fixedly connected to the clamping member 40, and the other end is slidably connected to the mounting seat 10, so that the clamping member 40 is slidably connected to the mounting seat 10. The clamping member 40 moves synchronously with the tooling body 20, and the connecting member 40 is connected to the mounting seat 10. The connecting piece is a guide column, which can guide the movement of the tool body 20 and the clamping piece 40 .

In some embodiments, the welding tool 100 further includes a gas supply connector 60 connected to the tool body 20 , the gas supply connector 60 is in communication with the welding channel 201 , and the gas supply connector 60 is used to introduce protective gas into the welding channel 201 .

Commonly used protective gases include helium, argon and nitrogen, and this embodiment does not specifically limit other types of protective gases.

By introducing protective gas into the welding channel 201, the welding quality of the weld can be improved, the width of the welding seam heating action zone can be reduced, and material oxidation can be avoided.

In some embodiments, the welding tool 100 further includes a dust removal pipe 70 connected to the tool body 20 , and the dust removal pipe 70 is in communication with the welding channel 201 .

Specifically, one end of the dust removal pipe 70 is connected to the welding channel 201, and the other end is connected to the dust removal equipment. The dust removal pipe 70 can extract smoke or other impurities in the welding channel 201 to avoid blocking light.

The dust removal pipe 70 may be connected to the tool body 20 in various ways. For example, the dust removal pipe 70 may be plugged into the side wall of the tool body 20 , or the dust removal pipe 70 may be threadedly connected or snap-connected to the side wall of the tool body 20 .

In some embodiments, the dust removal pipe 70 and the air supply connector 60 are respectively arranged on opposite sides of the tool body 20. The tool body 20 also includes a mounting portion 23 connected between the connecting seat 21 and the welding nozzle 22, and the dust removal pipe 70 and the air supply connector 60 are respectively arranged on opposite sides of the mounting portion 23.

In some embodiments, the dust removal tube 70 includes a first tube body 71 and a second tube body 72 that are connected to each other. The first tube body 71 is connected to the tooling body 20 , and the second tube body 72 extends along the first direction X and passes through the through hole 102 of the mounting seat 10 .

By setting the dust removal pipe 70, during the welding process, the dust removal pipe 70 is used to absorb the smoke generated during welding to avoid blocking light, and the dust removal is conducive to the protective gas entering the welding channel 201, thereby improving the welding efficiency. The welding quality of the seam.

The welding jig 100 can be used in the welding process of the battery. During welding, the collector and the pole to be welded are pressed by the jig body 20. If the pressure of the welding jig 100 on the workpiece to be welded is too large, the elastic member 30 will be compressed, and the jig body 20 can move toward the mounting seat 10, that is, the distance between the jig body 20 and the mounting seat 10 can be adjusted according to the size of the pressure, and the jig body 20 can always press the workpiece to be welded, which can prevent the workpiece to be welded from being damaged and avoid cold welding. Since the elastic member 30 is sleeved on the jig body 20, compared with the method of setting multiple elastic members 30, the elastic member 30 can provide a balanced elastic force for the jig body 20, avoiding the failure of the jig body 20 to return to its original position due to the abnormal return of the elastic member 30, causing cold welding. Therefore, the welding jig 100 can make the jig body 20 rebound smoothly, avoid the problem of cold welding, optimize the welding effect, and improve the production quality and yield of the battery.

A second aspect of the present application provides a welding device, comprising a welding tool 100 as in the first aspect and a welder, wherein the welder is disposed above the welding tool 100 .

The welder can be a laser welder, an ultrasonic welder, a flame welder, etc., and the present application does not limit the type of welder. Taking the welder as a laser welder as an example, the laser emitted by the laser welder can be applied to the workpiece to be welded through the welding channel 201 in the tooling body 20.

The above-mentioned welding equipment includes the welding tool 100 provided in the first aspect, which also has the advantage of improving welding quality.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims (13)

A welding tool, characterized by comprising: A mounting seat, wherein a mounting hole is provided in the mounting seat; A tool body, one end of which is movably accommodated in the mounting hole along a first direction, and a welding channel for welding is provided in the tool body; An elastic member is sleeved on the peripheral side of the tool body, two ends of the elastic member are respectively abutted against the mounting seat and the tool body, and the deformation direction of the elastic member is the same as the first direction. The welding tool as described in claim 1 is characterized in that: the welding tool also includes a clamping piece, the clamping piece is connected to one side of the mounting seat and a guide hole is opened on the clamping piece, and the tool body is inserted into the guide hole. The welding tool as described in claim 2 is characterized in that: the clamping piece is detachably connected to the mounting seat, and the tool body is movably arranged in the guide hole along the first direction and can be clamped on the clamping piece. The welding tool as described in claim 3 is characterized in that: a holding protrusion is provided on the outer peripheral surface of the tool body, and the two ends of the elastic member are respectively abutted against the inner wall of the mounting hole and the holding protrusion, and the end of the holding protrusion away from the elastic member can be abutted against the holding member or spaced apart from the holding member. The welding tool as described in claim 4 is characterized in that: the clamping member is provided with a plurality of limiting protrusions on the peripheral side of the guide hole for limiting and clamping the clamping protrusion. The welding tool according to any one of claims 2 to 5, characterized in that: the tool body comprises a connecting seat and a welding nozzle connected to each other, the welding channel runs through the connecting seat and the welding nozzle, the connecting seat is a columnar structure and the elastic member is sleeved on the connecting seat, and the welding nozzle is used to resist Press the workpiece to be welded. The welding tool as described in claim 6 is characterized in that: a first limiting portion is provided on the connecting seat, the first limiting portion is movably inserted into the guide hole, and the first limiting portion is used to limit the rotation of the tool body. The welding tool as described in claim 7 is characterized in that: a second limiting portion is provided on the inner surface of the guide hole, the first limiting portion and the second limiting portion are respectively a first plane formed on the peripheral side wall of the connecting seat and a second plane formed on the hole wall of the guide hole, and the first plane and the second plane are arranged opposite to each other and parallel to each other. The welding tool as described in any one of claims 2-8 is characterized in that: the clamping member includes two clamping blocks arranged opposite to each other, the two clamping blocks are connected to each other and together form the guide hole, and the clamping blocks are fixedly connected to the mounting seat by fasteners. The welding tool as described in any one of claims 1-9 is characterized in that: the welding tool also includes a gas supply joint connected to the tool body, the gas supply joint is connected to the welding channel, and the gas supply joint is used to introduce protective gas into the welding channel. The welding tool as described in any one of claims 1-10 is characterized in that the welding tool also includes a dust removal pipe connected to the tool body, and the dust removal pipe is connected to the welding channel. A welding device, characterized in that it comprises: The welding tool as claimed in any one of claims 1 to 11; and The welder is arranged above the welding tool. The welding equipment according to claim 12 is characterized in that the welder is one of a laser welder, an ultrasonic welder, and a flame welder.