CN218081027U

CN218081027U - Tab pressure welding device

Info

Publication number: CN218081027U
Application number: CN202221839366.4U
Authority: CN
Inventors: 费晓明
Original assignee: Hangzhou Mange Network Technology Co ltd
Current assignee: Hangzhou Mange Intelligent Equipment Co ltd
Priority date: 2022-07-15
Filing date: 2022-07-15
Publication date: 2022-12-20
Anticipated expiration: 2032-07-15

Abstract

The application relates to the technical field of tab pressure welding, in particular to a tab pressure welding device. The tab pressure welding device comprises a bearing platform and a pressure welding assembly, wherein the bearing platform is used for bearing an electronic device and a tab; the pressure welding assembly comprises a driving unit, a pressure welding piece and an elastic piece, and the pressure welding piece is positioned above the bearing table and connected with the driving unit along the direction vertical to the plane of the bearing table; the elastic piece is arranged between the driving unit and the pressure welding piece, the pressure welding piece can move towards the bearing table under the driving of the driving unit, and the elastic piece is compressed in the process of extruding the pole lug, so that the compressed elastic piece can apply elastic force to the pressure welding piece to press the pole lug. The utility model has the advantages that: through set up the elastic component between drive unit and pressure welding piece to make pressure welding piece compress the elastic component at the in-process of extrusion utmost point ear, the elastic restoring force of elastic component is exerted in utmost point ear through pressure welding piece, makes pressure welding piece continuously provide pressure and guarantee that the pressfitting is reliable for utmost point ear.

Description

Tab pressure welding device

Technical Field

The application relates to the technical field of tab pressure welding, in particular to a tab pressure welding device.

Background

With the continuous popularization of small-sized mobile electric equipment such as mobile phones and pads in daily life of people, the requirements for sharing mobile power supplies and convenient mobile power supplies are increased.

At present, mobile power supply production enterprises are increasingly demanding on mobile power supply production, and in the welding stage of the lugs of the mobile power supply battery core, the problem that poor welding or welding failure is caused due to the fact that the lugs and a circuit board are not pressed in place usually occurs in the existing lug press welding device.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a tab welding apparatus capable of improving the reliability of the press-fit between the tab and the electronic device.

A tab pressure welding device is used for welding a tab on an electronic device; the tab pressure welding device comprises a bearing platform and a pressure welding assembly, wherein the bearing platform is used for bearing the electronic device and the tabs, and the pressure welding assembly is used for pressing the tabs on the electronic device and welding the tabs; the pressure welding assembly comprises a driving unit, a pressure welding piece and an elastic piece, and the pressure welding piece is positioned above the bearing table and connected with the driving unit along a direction perpendicular to the plane where the bearing table is positioned; the elastic component is located drive unit with between the pressure welding piece, the pressure welding piece can be in under drive unit's the drive orientation the plummer motion, and is extrudeing the in-process compression of utmost point ear the elastic component, so that after the compression the elastic component can be right the pressure welding piece is pressed and is supported utmost point ear application elastic force.

It can be understood that, the elastic element is arranged between the driving unit and the pressure welding element, so that the pressure welding element compresses the elastic element in the process of extruding the lug, the elastic element is compressed to have elastic restoring force, and the elastic restoring force of the elastic element is applied to the lug through the pressure welding element, so that the pressure welding element continuously provides pressure for the lug to ensure reliable pressing.

In one embodiment, the tab pressure welding device further comprises an adjusting assembly, wherein the adjusting assembly is arranged on the bearing platform, is used for bearing the electronic device and the tab, and can move on the bearing platform to adjust the positions of the electronic device and the tab on the bearing platform.

It can be understood that the adjusting assembly is arranged to adjust the positions of the electronic device and the tabs on the bearing table, so that the electronic device and the tabs can be conveniently adjusted to positions where the tabs can be conveniently pressed and welded.

In one embodiment, the adjusting assembly includes a first moving stage, the first moving stage is mounted on the carrier stage for carrying the electronic device and the tab, and the first moving stage is capable of moving on the carrier stage along a first direction.

In one embodiment, the adjustment assembly further comprises a second moving stage mounted on the carrier stage and movable in a second direction on the carrier stage; the first mobile station is arranged on the second mobile station, and the first direction and the second direction are arranged at an angle.

It can be understood that the electronic device and the tab can move in the first direction and the second direction which are arranged at an angle, so that the adjustment precision of the electronic device and the tab is improved, the electronic device and the tab can be moved to a proper position by the first mobile station and the second mobile station for press welding, and the press welding piece is ensured to have a good press welding effect on the tab.

In one embodiment, the second moving stage is provided with a first adjusting groove extending along a first direction, and the bearing stage is provided with a second adjusting groove extending along a second direction; wherein the first moving stage is mounted in the first adjustment groove and is movable in an extending direction of the first adjustment groove, and the second moving stage is mounted in the second adjustment groove and is movable in an extending direction of the second adjustment groove.

In one embodiment, the driving unit comprises a base, a driving part and a pressing plate, the base is installed on the bearing platform, the driving part is installed on the base, and the pressing plate is connected with the driving part and can move towards the bearing platform under the driving of the driving part; one end of the elastic piece is connected with the pressing plate, and the other end of the elastic piece is connected with the pressure welding piece.

In one embodiment, the bonding assembly further comprises a guide unit, wherein the guide unit is arranged along a plane perpendicular to the bearing table and is mounted on the base to guide the movement of the pressure plate.

It will be appreciated that the guide unit is provided so as to guide the movement of the platen on the base.

In one embodiment, the pressure welding assembly further comprises a limiting unit, and the limiting unit is used for limiting the stroke of the pressure plate moving towards the bearing table.

In one embodiment, the limiting unit includes a limiting member and a fitting member, the limiting member is mounted on the pressing plate, and the fitting member is mounted on the bearing table and can abut against the limiting member when the limiting member moves to a predetermined position along with the pressing plate.

In one embodiment, the limiting member is movably mounted on the pressing plate, so that the initial distance between the limiting member and the mating member can be adjusted.

Compared with the prior art, this application through drive unit with set up between the pressure welding piece the elastic component, thereby make the pressure welding piece is in the extrusion the in-process compression of utmost point ear the elastic component, so that the elastic component is compressed and has the elastic restoring force, the elastic restoring force of elastic component passes through the pressure welding piece is applyed in utmost point ear makes the pressure welding piece continuously for utmost point ear provides pressure and guarantees that the pressfitting is reliable.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the description below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a tab pressure welding device provided by the present application before lamination;

fig. 2 is a schematic structural view of the tab pressure welding device provided by the present application when being pressed;

fig. 3 is a partially enlarged schematic view of a portion a of fig. 1.

Reference numerals: 100. a tab pressure welding device; 10. a bearing table; 11. a second regulating groove; 20. pressure welding the assembly; 21. a drive unit; 211. a base; 212. a drive member; 213. pressing a plate; 2131. a first laser via; 214. a control member; 22. pressing a welded part; 221. a second laser via; 23. an elastic member; 24. a guide unit; 25. a limiting unit; 251. a limiting member; 252. a mating member; 30. an adjustment assembly; 31. a first mobile station; 32. a second mobile station; 321. a first adjustment groove; 40. a tab; 50. an electronic device; 60. an indicating component; 61. and an indicator light.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The use of the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like in the description of the present application is for purposes of illustration only and is not intended to represent the only embodiment.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the present application, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to fig. 3, the present application provides a tab welding apparatus 100, in this embodiment, the tab welding apparatus 100 is used to press a tab 40 of a battery cell of a mobile power supply onto an electronic device 50, and weld the pressed tab 40 and the electronic device 50. Among them, the electronic device 50 is a circuit board. Of course, in other embodiments, the tab welding apparatus 100 may also be used for performing the compression welding between the tab 40 and the other electronic device 50 in other electronic components such as a battery, which is not limited herein.

In order to solve the problems of the conventional tab pressure welding device, the present application provides a tab pressure welding device 100 for welding a tab 40 to an electronic device 50; the tab pressure welding device 100 comprises a bearing platform 10 and a pressure welding assembly 20, wherein the bearing platform 10 is used for bearing an electronic device 50 and a tab 40, and the pressure welding assembly 20 is used for pressing and welding the tab 40 on the electronic device 50; the pressure welding assembly 20 comprises a driving unit 21, a pressure welding piece 22 and an elastic piece 23, wherein the pressure welding piece 22 is positioned above the bearing table 10 and connected with the driving unit 21 along a direction vertical to the plane of the bearing table 10; the elastic member 23 is disposed between the driving unit 21 and the bonding member 22, and the bonding member 22 can move toward the bearing table 10 under the driving of the driving unit 21 and compress the elastic member 23 during the process of pressing the tab 40, so that the compressed elastic member 23 can apply an elastic force to the bonding member 22 against the tab 40.

It should be noted that, aiming at the problem of welding failure caused by the insufficient pressing between the tab and the electronic device by the conventional tab pressing and welding device, in the present application, the elastic member 23 is arranged between the pressing and welding member 22 and the driving unit 21, when the driving unit 21 drives the pressing and welding member 22 to press the tab 40, in the process that the pressing and welding member 22 presses the tab 40 on the electronic device 50 and continuously presses the tab 40, the elastic member 23 can be compressed by the reaction force generated in the pressing and welding member 22, the compressed elastic member 23 has the elastic restoring force, the elastic restoring force of the elastic member 23 is reversely applied to the pressing and welding member 22, and the elastic restoring force is transmitted to the tab 40 through the pressing and welding member 22, so that the elastic member 23 can continuously provide the elastic force to the tab 40 through the pressing and welding member 22 while pressing the tab 40 by the pressing and welding member 22, thereby ensuring the reliable pressing and welding between the tab 40 and the electronic device 50 by the pressing and welding member 22.

Alternatively, the elastic member 23 is made of stainless steel or carbon steel, which can increase the elastic force of the elastic member 23, thereby increasing the elastic abutting force of the elastic member 23 applied to the tab 40 by the pressure welding member 22. Of course, in other embodiments, the elastic member 23 may be made of other materials as long as the elastic force of the elastic member 23 is ensured to be large enough, and is not limited herein.

As shown in fig. 1 and 2, the tab bonding apparatus 100 further includes an adjusting assembly 30, the adjusting assembly 30 is disposed on the carrier 10, and is used for carrying the electronic device 50 and the tab 40, and is capable of moving on the carrier 10 to adjust the positions of the electronic device 50 and the tab 40 on the carrier 10.

It should be noted that, because the sizes of the electronic devices 50 and the tabs 40 with different specifications are different, and the pressure welding piece 22 can only do linear reciprocating motion along a certain fixed direction perpendicular to the bearing platform 10, so that the position where the pressure welding piece 22 can perform the pressure welding operation is fixed, therefore, the electronic devices 50 and the tabs 40 with different sizes need to be adjusted to the position matched with the pressure welding position of the pressure welding piece 22 on the bearing platform 10, so that the accuracy of the pressure welding process of the pressure welding piece 22 can be ensured, and the pressure welding strength between the tabs 40 and the electronic devices 50 is not enough or the pressure welding fails due to pressure welding offset is avoided.

Specifically, the adjusting assembly 30 includes a first moving stage 31, the first moving stage 31 is mounted on the carrier 10 to carry the electronic device 50 and the tab 40, and the first moving stage 31 is capable of moving on the carrier 10 along a first direction.

The first moving stage 31 moves the electronic device 50 and the tab 40 on the carrier 10 along a first direction, so as to adjust the electronic device 50 and the tab 40 to a position where the bonding of the bonding member 22 is facilitated.

Specifically, the adjusting assembly 30 further comprises a second moving stage 32, and the second moving stage 32 is mounted on the carrier stage 10 and can move on the carrier stage 10 along a second direction. The first mobile station 31 is mounted on the second mobile station 32, and the first direction and the second direction are arranged at an angle.

It should be noted that, the electronic device 50 and the tab 40 can move in the first direction and the second direction which are set at an angle, so that the adjustment precision of the electronic device 50 and the tab 40 is improved, and the first mobile station 31 and the second mobile station 32 are matched with each other, so that the electronic device 50 and the tab 40 are moved to a proper position more easily and accurately for press welding, and the press-welding part 22 is ensured to have a good press-welding effect on the tab 40.

In the present embodiment, the first direction and the second direction are perpendicular to each other; that is, the electronic device 50 and the tab 40 can be adjusted in both horizontal and vertical directions in the plane of the carrier 10. Of course, in other embodiments, the first direction and the second direction may also be at other included angles of 30 °, 45 °, 60 °, 120 °, and the like, which is not limited herein.

Specifically, the second moving stage 32 is provided with a first adjusting groove 321 extending along the first direction, and the bearing stage 10 is provided with a second adjusting groove 11 extending along the second direction; the first movable stage 31 is mounted in the first adjustment groove 321 to be movable in the extending direction of the first adjustment groove 321, and the second movable stage 32 is mounted in the second adjustment groove 11 to be movable in the extending direction of the second adjustment groove 11.

In other embodiments, a sliding rail may be disposed between the second mobile station 32 and the first mobile station 31, and a sliding groove is disposed between the second mobile station 32 and the first mobile station 31, and the sliding rail and the sliding groove are cooperatively connected, so that the first mobile station 31 can move on the second mobile station 32 along the first direction; one of the second movable table 32 and the bearing table 10 is provided with a slide rail, and the other one is provided with a slide groove, and the slide rail and the slide groove are connected in a matching manner, so that the second movable table 32 can move on the bearing table 10 along the second direction.

Further, the driving unit 21 includes a base 211, a driving member 212, and a pressing plate 213. The base 211 is installed on the bearing table 10, the driving element 212 is installed on the base 211, and the pressing plate 213 is connected with the driving element 212 and can move towards the bearing table 10 under the driving of the driving element 212; one end of the elastic member 23 is connected to the pressing plate 213, and the other end is connected to the pressure welding member 22.

In this embodiment, the driving member 212 is a cylinder. The platen 213 is driven by the cylinder to reciprocate linearly in a direction perpendicular to the plane of the susceptor 10. Of course, in other embodiments, the driving member 212 may be another type of driving structure such as a motor, as long as the driving structure can drive the movement of the pressing plate 213, and is not limited herein. The tab welding apparatus 100 is further provided with a button (not shown) for controlling the driving member 212 to start/reset, so as to control the driving member 212 to drive the pressing plate 213 to move.

In addition, a control member 214 is connected to the driving member 212, and the control member 214 is used for controlling the driving speed and the pressure of the driving member 212 to the pressing plate 213. The control part 214 controls the driving speed of the driving part 212 to the pressure plate 213, mainly to avoid the damage of the tab 40 due to excessive pressing by the pressure welding part 22 caused by excessive impact of the pressure plate 213; the control member 214 controls the pressure of the driving member 212 to the pressing plate 213 in order to enhance the pressing effect between the tab 40 and the electronic device 50 by increasing the pressing force of the pressure welding member 22 to the tab 40.

Specifically, the control member 214 is an intake valve, and controls the driving speed and pressure of the driving member 212 to the pressure plate 213 by adjusting the intake air amount of the cylinder.

Further, the pressure welding assembly 20 further includes a guide unit 24. The guide unit 24 is disposed along a plane perpendicular to the surface of the platform 10 and is mounted on the base 211 to guide the movement of the pressing plate 213. By providing the guide unit 24, the movement of the platen 213 on the base 211 is guided.

Specifically, the guiding unit 24 is configured as a sliding rail, the sliding rail is disposed on the base 211 and extends along a direction perpendicular to the plane of the plummer 10, and the pressing plate 213 is slidably connected to the sliding rail; of course, the base 211 may be provided with a sliding slot extending along a direction perpendicular to the plane of the susceptor 10, and the pressing plate 213 may be slidably mounted in the sliding slot.

Further, the bonding assembly 20 further includes a limiting unit 25, and the limiting unit 25 is used for limiting the stroke of the pressing plate 213 moving towards the carrier 10.

In order to prevent damage to the tab 40 caused by extreme compression of the tab 40 by the pressure welding member 22, the extreme movement position of the pressure welding member 22 needs to be limited. The limiting unit 25 is arranged to limit the stroke of the pressure plate 213 moving towards the bearing table 10, so that the phenomenon that the pressure plate 213 moves to a too low position to cause the pressure welding piece 22 to extrude the tab 40 at the limit and damage the tab 40 is avoided.

Specifically, the limiting unit 25 includes a limiting member 251 and a fitting member 252. The limiting member 251 is installed on the pressing plate 213, and the mating member 252 is installed on the plummer 10, and can abut against the limiting member 251 when the limiting member 251 moves to a predetermined position along with the pressing plate 213.

The limiting member 251 is a stud spirally mounted on the pressing plate 213, and the mating member 252 is a convex column protruding from the platform 10; the limiting member 251 penetrates through the surface of the pressing plate 213 far from the pressure welding member 22 and penetrates through the surface of the pressing plate 213 near the pressure welding member 22, and the part of the limiting member 251 penetrating through can be abutted and limited with the matching member 252.

Of course, the stopper 251 may be a protrusion provided on the surface of the pressure plate 213 close to the pressure-welded part 22, as long as it can abut against and be stopped by the fitting 252.

Further, the limiting member 251 is movably installed on the pressing plate 213, so that an initial distance between the limiting member 251 and the mating member 252 can be adjusted. It should be noted that the initial distance between the limiting member 251 and the mating member 252 refers to the distance between the limiting member 251 and the mating member 252 when the pressing plate 213 is in the initial state when the driving member 212 is not activated.

Since the limiting member 251 is provided as a stud screwed to the pressing plate 213 in this embodiment, the length of the portion of the limiting member 251 penetrating through the pressing plate 213 can be changed along with the depth of the limiting member 251 screwed into the pressing plate 213, so that the limit movement position of the pressure welding member 22 can be adjusted according to different situations.

Furthermore, a first laser hole 2131 is formed in the pressing plate 213, and a second laser hole 221 communicated with the first laser hole 2131 is formed in the pressure welding piece 22; along the direction perpendicular to the bearing table 10, the second laser holes 221 are located above the tabs 40, and laser irradiates the tabs 40 through the first laser holes 2131 and the second laser holes 221 so as to weld the tabs 40 on the circuit board. By such arrangement, after the tab 40 is pressed on the electronic device 50 by the press-welding piece 22, the tab 40 and the electronic device 50 after being pressed on are not moved to a welding region for welding, but can be directly welded at the same position, so that good welding between the tab 40 and the electronic device 50 is ensured.

The base 211 is further provided with an indicating assembly 60, and the indicating assembly 60 includes a detecting member (not shown) and an indicating lamp 61. The detection piece is used for sensing the working position of the pressure welding piece 22 and detecting whether the working position is abnormal; if the working position of the pressure welding piece 22 is abnormal, the indicator lamp 61 is displayed in red; if the tab welding apparatus 100 is in a normal operation state, the indicator lamp 61 is displayed in green. By the arrangement of the indicating assembly 60, the operation state of the tab pressure welding device 100 can be monitored in real time, and fault maintenance can be performed at the first time.

The utility model provides a utmost point ear pressure welding device 100 is through setting up elastic component 23 between drive unit 21 and pressure welding piece 22 to make pressure welding piece 22 compress elastic component 23 at the in-process of extrusion utmost point ear 40, make elastic component 23 compressed and have elastic restoring force with this, elastic component 23's elastic restoring force is applyed in utmost point ear 40 through pressure welding piece 22, make pressure welding piece 22 continuously provide pressure for utmost point ear 40 and guarantee that the pressfitting is reliable.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A tab pressure welding device is used for welding a tab (40) on an electronic device (50); the tab pressure welding device comprises a bearing platform (10) and a pressure welding assembly (20), wherein the bearing platform (10) is used for bearing the electronic device (50) and the tab (40), and the pressure welding assembly (20) is used for pressing and welding the tab (40) on the electronic device (50);

the welding assembly (20) is characterized by comprising a driving unit (21), a welding piece (22) and an elastic piece (23), wherein the welding piece (22) is positioned above the bearing table (10) and connected with the driving unit (21) along a direction perpendicular to the plane of the bearing table (10); elastic component (23) are located drive unit (21) with between pressure welding piece (22), pressure welding piece (22) can be in drive unit (21) drive down towards plummer (10) motion, and extrusion utmost point ear (40) in-process compression elastic component (23) to make after the compression elastic component (23) can be right pressure welding piece (22) are supported utmost point ear (40) and are applyed the elastic force.

2. The tab welding device according to claim 1, characterized in that the tab welding device further comprises an adjusting assembly (30), wherein the adjusting assembly (30) is arranged on the bearing platform (10) and used for bearing the electronic device (50) and the tab (40) and can move on the bearing platform (10) to adjust the position of the electronic device (50) and the tab (40) on the bearing platform (10).

3. The tab welding device according to claim 2, characterized in that the adjusting assembly (30) comprises a first moving table (31), the first moving table (31) being mounted on the carrier table (10) for carrying the electronic device (50) and the tab (40), and the first moving table (31) being movable on the carrier table (10) along a first direction.

4. The tab bonding apparatus according to claim 3, wherein the adjustment assembly (30) further comprises a second moving stage (32), the second moving stage (32) being mounted on the carrier stage (10) and being movable in a second direction on the carrier stage (10);

wherein the first mobile station (31) is mounted on the second mobile station (32), the first direction being arranged at an angle to the second direction.

5. The tab welding device according to claim 4, wherein the second moving table (32) is provided with a first adjusting groove (321) extending along a first direction, and the bearing table (10) is provided with a second adjusting groove (11) extending along a second direction;

wherein the first moving table (31) is mounted in the first adjusting groove (321) and is movable along the extending direction of the first adjusting groove (321), and the second moving table (32) is mounted in the second adjusting groove (11) and is movable along the extending direction of the second adjusting groove (11).

6. The tab welding device according to claim 1, characterized in that the driving unit (21) comprises a base (211), a driving member (212) and a pressing plate (213), the base (211) is mounted on the bearing table (10), the driving member (212) is mounted on the base (211), and the pressing plate (213) is connected with the driving member (212) and can move towards the bearing table (10) under the driving of the driving member (212);

one end of the elastic piece (23) is connected with the pressure plate (213), and the other end of the elastic piece is connected with the pressure welding piece (22).

7. The tab welding device according to claim 6, characterized in that the welding assembly (20) further comprises a guide unit (24), the guide unit (24) is arranged along a plane perpendicular to the bearing table (10) and is mounted on the base (211) for guiding the movement of the pressing plate (213).

8. The tab welding device according to claim 6, characterized in that the welding assembly (20) further comprises a limiting unit (25), wherein the limiting unit (25) is used for limiting the stroke of the pressure plate (213) moving towards the bearing table (10).

9. The tab welding device according to claim 8, wherein the limiting unit (25) comprises a limiting member (251) and a fitting member (252), the limiting member (251) is mounted on the pressing plate (213), and the fitting member (252) is mounted on the bearing table (10) and can abut against the limiting member (251) when the limiting member (251) moves to a predetermined position along with the pressing plate (213).

10. The tab welding device as claimed in claim 9, characterized in that the limiting member (251) is movably mounted on the pressing plate (213) so that an initial distance between the limiting member (251) and the fitting member (252) can be adjusted.