CN211840589U - Welding tool - Google Patents

Abstract

The utility model relates to a welding frock for fix a position soft package module, and compress tightly utmost point ear and polar plate in the soft package module, a serial communication port, include: the box body is internally provided with a limiting part for determining the spatial position of the soft package module; the pressure foot components are arranged corresponding to the positions of the polar lugs and the polar plates and used for pressing the polar lugs and the polar plates, and through holes are formed in the pressure foot components; the box body is detachably connected with the top cover. This welding frock adopts single welding position adapted independent presser foot, has ensured the inseparable laminating of utmost point ear and busbar on the welding position, convenient welding.

Description

Welding tool

Technical Field

The utility model relates to a welding jig field especially relates to a welding frock.

Background

The pouch module is a constituent unit of the battery system, and its quality determines the performance of the battery system. The soft package module comprises soft package battery, foam, a support, a bus bar and the like, the soft package battery is used as a basic composition unit in the battery system, and the batteries are combined together in a series-parallel connection mode. Be equipped with the assembled battery utmost point ear on the busbar and be used for realizing the circuit of series-parallel connection, through the welding between the polar plate of a plurality of battery utmost point ears and busbar, can realize the series-parallel connection between each laminate polymer battery, and then form laminate polymer module battery's wholeization.

The soft package module is poor in consistency, the battery core of the soft package battery is soft, the size of each battery core has an error, after the battery core is assembled to the module through each part and finally assembled, the error between the actual size and the required size is larger, and the assembled size of each module is basically different; in addition, the soft package module is easy to deform and even crush the module when being stressed too much. The welding frock in use often neglects soft packet of module's these characteristics among the present common technological means, finally leads to the poor problem of welding position skew and welding quality, for example rosin joint or weld and wear utmost point ear.

SUMMERY OF THE UTILITY MODEL

Based on this, provide a welding frock, ensured the inseparable laminating of utmost point ear and busbar on the welding position, convenient welding.

In order to achieve the technical effect, the following technical scheme is adopted in the application.

The utility model provides a welding frock for the soft package module in location, and compress tightly utmost point ear and polar plate in the soft package module, its characterized in that includes: the box body is internally provided with a limiting part for determining the spatial position of the soft package module; the top cover is detachably connected with the box body, a plurality of pressure foot assemblies are arranged on the top cover, the pressure foot assemblies correspond to the positions of the lugs or the polar plates and are used for pressing the lugs and the polar plates, and through holes used for welding the lugs and the polar plates are formed in the pressure foot assemblies.

The welding tool comprises a box body and a capping cover. The soft package module is placed in the box body, and the position of the soft package module is limited by the limiting part in the box body, so that the soft package module cannot move in space; the top cover covers in the box from soft package module top, and the presser foot subassembly that sets up on the top cover suppresses utmost point ear and polar plate on the soft package module, is utmost point ear and polar plate laminating. Meanwhile, the number of the pressing foot components is equal to that of the pole lugs or the pole plates on the soft package module, and each pressing foot component corresponds to one pole lug or one pole plate independently, so that tight attachment of the pole lugs and the pole plates on the busbar at a welding position is guaranteed, laser is used for welding the pole lugs and the pole plates through holes in the pressing foot components, and the welding process is facilitated.

In some embodiments, the presser foot assembly includes a connecting block, a presser foot, and a guide elastic member, the connecting block is slidably connected with the presser foot, and the guide elastic member is disposed between the connecting block and the presser foot.

In some embodiments, the capping cap is provided with a through hole, and the connecting block is embedded in the through hole of the capping cap.

In some embodiments, a through hole is formed in the connecting block, a through hole is formed in the presser foot, and the through hole of the connecting block is communicated with the through hole of the presser foot.

In some embodiments, the connecting block and the presser foot are slidably connected through a guide unit, and the guide unit includes a guide rod, and two ends of the guide rod are respectively connected with the connecting block and the presser foot.

In some embodiments, the guide spring is a spring that is placed over the guide rod.

In some embodiments, the capping cover comprises a cover base and a presser foot base, wherein a through hole is formed in the cover base, and the presser foot base is detachably mounted in the through hole of the cover base; the presser foot is arranged on the presser foot base.

In some embodiments, the box body comprises a base, a capping column and a limiting block; the limiting blocks are arranged on the base, and surround a limiting space for limiting the spatial position of the soft package module; the top sealing column is fixedly connected to the base, and two or more sides of the top sealing column and the base form a space for accommodating the soft package module; the top cover is detachably connected with the top cover.

In some embodiments, the lock catch further comprises a lock catch, wherein the lock catch comprises a lock seat and a bolt seat, the lock seat is arranged on the box body, the bolt seat is arranged on the top cover, and a bolt on the lock seat fastens the bolt seat.

In some embodiments, the box body is provided with a fool-proof block, and the capping cover is provided with a fool-proof groove matched with the fool-proof block.

In some embodiments, the top of the box body is provided with a positioning pin, and the top cover is provided with a positioning hole matched with the positioning pin.

Drawings

Fig. 1 is a schematic structural view of a soft package module adopted in a welding tool in some embodiments of the present application;

FIG. 2 is a schematic structural view of a bus bar used in the soft packing module shown in FIG. 1;

fig. 3 is a schematic view of an integrated structure of the soft packing module shown in fig. 1;

FIG. 4 is an isometric view of a welding fixture according to some embodiments of the present application;

FIG. 5 is a schematic structural diagram of a box in the welding tool of the embodiment shown in FIG. 4;

FIG. 6 is a schematic structural diagram of a welding tool according to an embodiment of the present application different from that shown in FIG. 4;

FIG. 7 is a top view of the welding tooling of FIG. 6;

fig. 8 is a schematic structural view of a presser foot assembly in the welding tool according to some embodiments;

fig. 9 is a schematic structural view of a pressure foot assembly in a welding tool provided in some embodiments without a spring;

fig. 10 is a schematic view of the tab position and pressing relationship between the presser foot assembly and the tab in the welding tool according to some embodiments.

Reference numerals:

100, a soft package module; 110, a bus bar; 111, a chassis; 112, a bus circuit; 113, a polar plate; 114, a feedthrough hole; 120, a support; 130, a pouch cell; 131, a tab; 140, a package cover;

200, a box body; 210, a base; 220, sealing the top column; 230, a limiting block; 240, a locating pin; 250, fool-proof blocks; 260, reinforcing ribs;

300, a capping cap; 310, a cap base; 320, a presser foot base; 330, a presser foot assembly; 331, connecting blocks; 332, a presser foot; 333, guide posts; 334, end-block; 335, a spring; 336, mounting holes; 340, positioning holes; 350, fool-proof grooves;

400, a buckle; 410, a lock seat; 420, a bolt seat;

500, laser via holes; 501, through holes are arranged; 502, lower through holes.

A, bipolar ear condition; b, monopolar ear case.

Detailed Description

Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and similar directional or positional expressions are used herein for purposes of illustration only.

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

The through hole of the connecting block is communicated with the through hole of the presser foot, wherein the communication means that light can pass through the through holes on the connecting block and the presser foot in sequence without obstacles.

The application provides a welding frock for compress tightly utmost point ear and the polar plate on the busbar on the laminate polymer battery in the laminate polymer module, make utmost point ear and polar plate closely laminate, convenient welding ensures welding quality, avoids appearing the rosin joint or welds the phenomenon emergence of wearing utmost point ear. In order to facilitate understanding of the present application, the structure of the soft package module, the positional relationship between the tabs and the bus bars, the main structure of the welding tool, and the implementation manner of compressing the tabs and the bus bar plates will be sequentially described in preferred embodiments, and the present application will be more fully described with reference to the related drawings.

Referring to fig. 1, for a typical pouch module 100 operated by the welding tool disclosed in the present application, the pouch module 100 includes a bus bar 110, a bracket 120, a pouch battery 130, and a sealing cover 140, wherein a plurality of pouch batteries 130 are sequentially inserted and fixed on the bus bar 110 and the bracket 120, and finally the sealing cover 140 is fixedly installed on the bus bar 110 and the bracket 120, and defines the position of the pouch battery 130, so as to prevent the pouch battery 130 from sliding on the bus bar 110 and the bracket 120. The laminate battery 130 has a plurality of tabs 131, and the tabs 131 are conductor sheets, typically metal sheets, such as copper sheets or aluminum sheets. It is understood that the tab 131 may be provided with a pole.

Referring to fig. 2, which is a schematic structural diagram of a bus bar 110 in the pouch module 100, the bus bar 110 includes a chassis 111 and a bus circuit 112, wherein the bus circuit 112 is a circuit for connecting a plurality of pouch batteries 130 in series and in parallel. Each branch of the bus circuit 112 extends with a plate 113 to be welded with the tab 131. The bus bar 110 is provided with insertion holes 114 for allowing the tabs 131 to pass through at both sides of the plate 113. It is understood that when the pouch battery 130 has only one tab 131 at the same pole, the bus bar 110 may have a through hole 114 for receiving the tab 131 to pass through at a position on only one side of the plate 113.

Referring to fig. 3, which is a schematic view of the assembled overall structure of the soft packing module 100, the tab 131 passes through the insertion hole 114 (not shown in this figure, see fig. 2), and is then folded and attached to the plate 113. Since the tab 131 is generally a metal sheet, and is not attached parallel to the plate 113, but is folded from one side of the plate 113 to close to the plate 113, since the metal sheet has a certain elasticity, when the force acting on the tab 131 disappears, the tab 131 slightly bounces to be spaced from the plate 113 by a certain distance, in this case, a cold-joint condition is easily occurred, and if the tab 131 is welded to the plate 113 by force, a condition of welding through the tab 131 is easily occurred, thereby resulting in a low yield of finished products.

From this, this application provides a welding frock that can solve above-mentioned problem.

Referring to fig. 4, a schematic structural diagram of a welding tool that may be used as a reference in some embodiments provided herein includes two major parts, a box 200 and a capping cover 300.

The box body 200 is used for accommodating the soft package module 100 and limiting the spatial position of the soft package module 100, so that the uncontrollable sliding of the soft package module 100 is prevented, and further the welding failure is prevented; in addition, the case 200 may provide a reference height for pressing the cap 300.

The box body 200 mainly includes a base 210, a capping column 220, and a stopper 230. The base 210 plays a role of supporting other parts of the foundation, and the capping column 220 and the limiting block 230 are connected to the base 210; the limiting block 230 can be one, two or even multiple blocks, the actual difference of one, two or multiple limiting blocks 230 is whether the limiting block 230 is integrated or split, the limiting block 230 encloses a limited area, the size of the limited area can just accommodate the soft package module 100, and the spatial position of the soft package module 100 can be limited and cannot slide in the box body 200; the capping post 300 has a height corresponding to that of the pouch module 100 for connecting the capping cap 300.

Specifically, the capping column 300 may be welded, detachably connected, or inserted and embedded to the base 210. The following conditions are satisfied: i.e., when the capping post 300 is attached to the base 210, it will not displace relative to the base 210.

Specifically, stopper 230 is fixed connection on base 210, and when stopper 230 was two or the polylith, stopper 230 slidable or joint, insert, embedding etc. connected mode are connected on base 210, and the convenient soft package module 100 according to equidimension not carries out nimble regulation, nevertheless must satisfy following condition: after the position of the limiting block 230 is determined, the specific position thereof may be locked, for example, by locking the cylinder, locking the adjusting bolt, and the like.

In some embodiments, the box 200 may further include a stiffener 260, the stiffener 260 connecting the base 210 and the capping column 220 and having a plane perpendicular to the base 210 and the capping column 220 for increasing the strength of the capping column 220 and preventing the capping column 220 from bending or breaking away from the base 210.

Specifically, the shape of the rib 260 may be a triangular shape, a trapezoidal shape, a rectangular shape, or other shapes that can perform the above-described functions in various mechanical engineering fields.

In one embodiment, the capping column 220 may also function as a limiting block 230, that is, only the capping column 220 is provided, and the limiting block 230 is not further provided, and the capping column 220 defines a spatial position of the soft packing module 100 and is connected with the capping cap 300.

Or, in another embodiment, the limiting block 230 may also function as the capping column 220, that is, only the limiting block 230 is provided, and the capping column 220 is not further provided, and the limiting block 230 defines a spatial position of the soft package module 100 and is connected with the capping cover 300.

In summary, the limiting block 230 can be considered to be integrated with the capping column 220.

Following the above description of the case 200, the capping cover 300 is used to compress the tab 131 and the plate 113 (see fig. 3) in the flexible packaging module 100, so that the tab 131 and the plate 113 are tightly attached, and provide a laser access for laser welding.

The cap 300 basically includes a cap base 310 and a presser foot assembly 330, the presser foot assembly 330 being attached to the cap base 310.

The presser foot assemblies 330 are used for compressing the tabs 131 and the pole plates 113 (please refer to fig. 3) in the soft package module 100, and as there are multiple sets of the tabs 131 and the pole plates 113, there are multiple presser foot assemblies 330 corresponding to the tabs 131 or the pole plates 113, when the best effect is achieved, one presser foot assembly 330 compresses one tab 131 corresponding to one tab, or one presser foot assembly 330 compresses one pole plate 113 corresponding to one pole plate 113, it can be understood that, in order to save cost or other specific situations, one presser foot assembly 330 may also correspond to two or more tabs 131 or pole plates 113. The details of one presser foot assembly 330 for each of the tabs 131 will be described in detail with respect to the specific structure of the presser foot assembly 330 and the pressing relationship of the tabs 131.

In addition, the base cover 310 is used for supporting the presser foot assemblies 330 and fixing the specific arrangement of each presser foot assembly 330, and integrates the plurality of presser foot assemblies 330 into a whole. When the base cover 310 is pressed toward the soft packing module 100, each of the pressure foot assemblies 330 presses on the tab 131 (please refer to fig. 3 at the same time), and presses the tab 131 and the plate 113.

Specifically, the capping cap 300 may be compressed by its own weight, or may be compressed by an external device such as a lock, for example, an air cylinder.

In one embodiment, the welding tool further comprises a buckle 400, the buckle 400 comprises a lock holder 410 and a bolt holder 420, wherein the lock holder 410 and the bolt holder 420 are respectively arranged on the box body 200 and the top cover 300. In a preferred embodiment, since the lock holder 410 has a larger volume than the latch holder 420, the lock holder 410 is disposed on the box 200 having a larger space, and the latch holder 420 is disposed on the capping cover 300. After the top cover 300 is covered on the box body 200, the top cover 300 and the box body 200 are locked by the buckle 400, thereby increasing the pressing force of the top cover 300 on the soft packing module 100.

In one embodiment, the capping cover 300 further includes a presser foot base 320, and in this embodiment, the presser foot assembly 330 is no longer disposed on the cover base 310 but is disposed on the presser foot base 320. The presser foot base 320 is detachably connected with the cover base 310, so that different presser foot bases 320 can be conveniently replaced corresponding to different soft package modules 100.

Specifically, the press-pin bases 320 may be connected to the base cover 310 in a manner of being locked after being connected to the base cover 310 by snap-fit, screw-fit, or sliding. The following conditions are satisfied: the connection position of the presser foot base 320 on the base cover 310 is relatively fixed, and the connection state cannot be easily changed by being stressed.

In an embodiment not shown in the drawings of the specification, the capping cap 300 further comprises supplementary blocks, which have different sizes as required. The presser foot assemblies 330 are slidably attached to the base cover 310 (or the presser foot base 320) in the direction of the plane of the top cover 300, and the adjacent presser foot assemblies 330 are filled with the supplementary blocks according to actual requirements to enlarge the spacing, and then the positions of the presser foot assemblies 330 and the supplementary blocks are locked. This setting is convenient to correspond various soft packet of module 100.

Referring to fig. 5, a structural diagram of a box 200 of a welding tool that may be used as a reference in some embodiments provided herein is shown. The positioning pins 240 are shown, and the positioning pins 240 are disposed on the face of the capping post 220 contacting the capping cap 300, please refer to fig. 4. The top sealing cover 300 is provided with a positioning hole 340 for inserting the positioning pin 240, and when the top sealing cover 300 covers the box body 200, the positioning pin 240 is inserted into the positioning hole 340 to ensure the relative position between the top sealing cover 300 and the box body 200 is accurate, and further ensure the relative position between the press foot assembly 330 on the top sealing cover 300 and the tab 131 on the soft package module 100 installed in the box body 200 is accurate (refer to fig. 3 if necessary). It is understood that the positioning positions of the positioning pin 240 and the positioning hole 340 can be interchanged, and the positioning hole 340 can be a through hole, a counter bore, a small groove, or the like.

Referring to fig. 6, some embodiments provided in the present application are slightly different from the welding tool in the embodiments represented in fig. 4 and 5.

Referring to the soft package module 100 shown in fig. 3, considering that the distribution of the tabs 131 on the soft package module 100 may not have rotational symmetry, the tabs 131 on the soft package module 100 shown in fig. 3 are distributed in two rows and two columns, and all the tabs 131 are rotated by 180 ° with a central point (not shown) of a tab 131 distribution area as a rotation center, and the tab 131 distribution after rotation and the tab 131 distribution before rotation cannot completely coincide. Correspondingly, the upper presser foot assembly 330 of the capping cover 300 also has no rotational symmetry, as shown in fig. 7. In this case, if the capping cover 300 is not attached to the housing 200 in the correct position by accident, the pressing pin assembly 330 may have difficulty in accurately pressing each tab 131 to be pressed.

Therefore, in some embodiments, see fig. 6, the welding tooling further comprises a fool-proof block 250 and a fool-proof groove 350, wherein the fool-proof block 250 is disposed on the case 200, the fool-proof groove 350 is disposed on the capping cover 300, and both the fool-proof block 250 and the fool-proof groove 350 are located near the interconnection of the case 200 and the capping cover 300. When the capping cap 300 is attached to the case 200 in a correct position, i.e., a position where each tab 131 to be pressed can be pressed by the presser foot assembly 330, the fool-proof block 250 is just seated in the fool-proof groove 350; when the cap 300 is to be attached to the case 200 at another position, the cap 300 cannot be attached to the case 200 because the fool-proof block 250 cannot fall into the fool-proof groove 350. Therefore, the situation that the lug 131 needing to be pressed is not pressed due to the fact that the seal cover 300 is installed in a wrong mode is avoided, and welding leakage is avoided.

It will be appreciated that the placement of the fool-proof block 250 and the fool-proof slot 350 may be reversed, i.e., the fool-proof block 250 may be placed on the capping cover 300 and the fool-proof slot 350 on the case 200.

Fig. 8 is a schematic structural diagram of a presser foot assembly 330 in a welding tool according to some embodiments of the present disclosure. Fig. 9 is a schematic structural view of another presser foot assembly 330 without a spring 335 in a welding tool according to some embodiments of the present disclosure.

The presser foot assembly 330 is disposed on the capping cover 300 and is used for compressing the tab 131 and the pole plate 113 to assist in welding the tab 131 and the pole plate 113, and therefore, the presser foot assembly 330 should have two main structural characteristics: 1, the presser foot assembly 330 protrudes compared to the capping cover 300 to press the tab 131 and the plate 113; 2, the presser foot assembly 330 is provided with a laser through hole 500 for allowing laser to pass through.

In some embodiments, as shown in fig. 8, the presser foot assembly 330 mainly includes a connecting block 331 and a presser foot 332 connected to the connecting block 331, wherein the connecting block 331 is used for connecting with the capping cover 300, and the presser foot 332 is a part protruding from the capping cover 300. Wherein, the connecting block 331 can be integrated with the capping cap 300; the connecting block 331 may also have a mounting hole 336 for detachable connection with the capping cap 300.

Specifically, in order to avoid the situation that the soft packing module 100 is easily deformed or even crushed when being subjected to an excessive force, the connecting block 331 is slidably connected with the presser foot 332, and an elastic connecting member is arranged between the connecting block 331 and the presser foot 332.

In one embodiment, referring to fig. 8, a guide post 333 is connected between the connecting block 331 and the pressure foot 332, one end of the guide post 333 is fixedly connected to the pressure foot 332, and the other end of the guide post 333 passes through the connecting block 331 and can slide up and down relative to the connecting block 331, so as to avoid the guide post 333 from coming out of the connecting block 331, an end block 334 is fixedly connected to the other end of the guide post 333 connected to the pressure foot 332, and the end block 334 plays a role in limiting. The guiding elastic part is a spring 335, and the spring 335 is sleeved on the guide post 333 and is arranged between the connecting block 331 and the pressure foot 332 to play roles of buffering and position recovery.

In another embodiment not shown in the figures, the connecting block 331 is provided with a through hole or a small groove, the inner contour of which is slightly larger than the outer contour of the presser foot 332, the presser foot 332 is sleeved in the through hole and can slide back and forth relative to the connecting block 331, and an elastic cylinder is arranged between the connecting block 331 and the presser foot 332 to play roles of buffering and position restoration.

In one embodiment, see fig. 9, the connecting block 331 is provided with an upper through hole 501, the presser foot 332 is provided with a lower through hole 502, and the upper through hole 501 is communicated with the lower through hole 502 for the laser to pass through.

Fig. 10 is a schematic diagram of the location of the tab 131 and the pressing relationship between the presser foot assembly 330 and the tab 131 according to some embodiments of the present disclosure.

Fig. 10 shows two typical cases, namely a dual-tab case a and a single-tab case B, wherein in the dual-tab case a, two tabs 131 are simultaneously bent and attached to the same pole plate 113, and the distance between the two tabs 131 is small; in the case of the single-pole tab B, a tab 131 is attached to one of the plates 113.

In one embodiment, in the single-lug case B, pressing is performed using a single presser foot assembly 330, such as the presser foot assembly 330 shown in fig. 9. In the bipolar ear case a, pressing is performed using a two single presser foot assembly 330, such as the presser foot assembly 330 shown in fig. 9. I.e., one presser foot assembly 330 for each tab 131.

In another embodiment, the difference from the previous embodiment is that in the bipolar ear case a, pressing is performed using a double presser foot assembly 330, such as the presser foot assembly 330 shown in fig. 8. The presser foot assembly 330 includes a connecting block 331 and two presser feet 332, the connecting mode can be seen as that the connecting blocks 331 of the two presser foot assemblies 330 with single presser foot as shown in fig. 9 are connected together, and the two upper through holes 501 are enlarged and merged into a through hole.

The basic conditions for the presser foot assembly 330 to press the tab 131 and the plate 113 are as follows: one side of the tab 131 opposite to the side formed when the tab 131 is bent is pressed, or two sides of the tab 131 adjacent to the side formed when the tab 131 is bent are pressed. Preferably, the pressure foot assembly 330 compresses each edge of the tab 131, leaving only the surface to be welded present in the laser through hole 500 for laser welding. Laser is irradiated on the tab 131 to melt the tab 131, so that the tab 131 and the plate 113 are welded together.

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 represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (11)

1. The utility model provides a welding frock for the soft package module in location, and compress tightly utmost point ear and polar plate in the soft package module, its characterized in that includes:

the box body is internally provided with a limiting part for determining the spatial position of the soft package module;

the top cover is detachably connected with the box body, a plurality of pressure foot assemblies are arranged on the top cover, the pressure foot assemblies correspond to the positions of the lugs or the polar plates and are used for pressing the lugs and the polar plates, and through holes used for welding the lugs and the polar plates are formed in the pressure foot assemblies.

2. The welding tool of claim 1, wherein: the presser foot assembly comprises a connecting block, a presser foot and a guide elastic piece, the connecting block is connected with the presser foot in a sliding mode, and the guide elastic piece is arranged between the connecting block and the presser foot.

3. The welding tool of claim 2, wherein: the top sealing cover is provided with a through hole, and the connecting block is embedded in the through hole of the top sealing cover.

4. The welding tool of claim 2, wherein: the connecting block is provided with a through hole, the presser foot is provided with a through hole, and the through hole of the connecting block is communicated with the through hole of the presser foot.

5. The welding tool of claim 2, wherein: the connecting block is connected with the presser foot in a sliding mode through a guide unit, the guide unit comprises a guide rod, and two ends of the guide rod are respectively connected with the connecting block and the presser foot.

6. The welding tooling of claim 5, wherein: the guide elastic piece is a spring, and the spring is sleeved on the guide rod.

7. The welding tool of claim 1, wherein: the top sealing cover comprises a cover base and a pressure foot base, a through hole is formed in the cover base, and the pressure foot base is detachably arranged in the through hole of the cover base; the presser foot is arranged on the presser foot base.

8. The welding tool of claim 1, wherein: the box body comprises a base, a top sealing column and a limiting block; the limiting blocks are arranged on the base, and surround a limiting space for limiting the spatial position of the soft package module; the top sealing column is fixedly connected to the base, and two or more sides of the top sealing column and the base form a space for accommodating the soft package module; the top cover is detachably connected with the top cover.

9. The welding tool of claim 1, wherein: the lock catch comprises a lock seat and a lock tongue seat, the lock seat is arranged on the box body, the lock tongue seat is arranged on the top cover, and the lock tongue on the lock seat is fastened to the lock tongue seat.

10. The welding tool of claim 1, wherein: the box body is provided with a fool-proof block, and the capping cover is provided with a fool-proof groove matched with the fool-proof block.

11. The welding tool of claim 1, wherein: the top of the box body is provided with a positioning pin, and the top sealing cover is provided with a positioning hole matched with the positioning pin.

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