CN221041153U

CN221041153U - Series welding machine for battery piece without main grid

Info

Publication number: CN221041153U
Application number: CN202322483147.8U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Wuxi Autowell Technology Co Ltd
Current assignee: Wuxi Autowell Technology Co Ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-05-28
Anticipated expiration: 2033-09-13

Abstract

The application provides a battery piece series welding machine without a main grid, which comprises a series conveying device, a welding strip supply device, a film pasting device and a battery piece laying device. The film pasting device is configured to lay the (i+1) th back adhesive film to the first laying position. And depositing the (i+1) th weld set to the first deposition location and the second deposition location. The battery piece laying device is configured to lay the (i+1) th battery piece to the first laying position, so that the (i+1) th back adhesive film bonds the second half section of the (i+1) th welding band group to the back of the (i+1) th battery piece; the film pasting device is further configured to lay an ith front adhesive film on the second laying position, so that the ith front adhesive film bonds the front half section of the (i+1) th welding strip group to the front face of the ith battery piece; the tandem conveyor is configured to step a predetermined distance back to free the first lay-down position. According to the application, the welding strip is adhered to the battery piece through the adhesive film, so that the binding force between the welding strip and the battery piece is improved, and the welding strip is prevented from being separated from the battery piece in the carrying process.

Description

Series welding machine for battery piece without main grid

Technical Field

The application relates to the field of photovoltaic module preparation, in particular to a series welding machine for a battery piece without a main grid.

Background

In the conventional battery plate, the front and back sides of the conventional battery plate are respectively provided with a transverse secondary grid line and a longitudinal primary grid line which are used for collecting current, and the width of the primary grid line is much wider than that of the secondary grid line.

Because a large amount of surface area of the battery piece is occupied by the main grid line, the light receiving area of the battery piece is greatly reduced, and finally the photoelectric conversion efficiency of the battery piece is limited. In view of this, the industry has proposed a novel no main grid (0 BB) battery piece, is provided with only the auxiliary grid line on the front and the back of no main grid battery piece, compares in traditional battery piece, and the photoelectric conversion efficiency of no main grid battery piece has obtained showing and has promoted, in addition, owing to there is not main grid, has reduced the use amount of silver thick liquid, and the cost of battery piece has also obtained reducing by a wide margin.

However, since there is no main grid on the battery piece, in order to realize the derivation of the current collected by all the auxiliary grids on the battery piece, the welding strip is required to be in contact with and conducted with each auxiliary grid line. By adopting the traditional series connection mode, the welding strip and the battery piece without the main grid cannot form firm connection after being welded, the bonding force between the welding strip and the battery piece without the main grid is poor, and the welding strip is easy to separate from the battery piece without the main grid in the subsequent battery string carrying process, so that the production and the manufacturing of a battery assembly are finally affected.

Disclosure of utility model

Aiming at the technical problems of the existing non-main grid battery piece series welding machine, the application provides the non-main grid battery piece series welding machine, which has the following detailed technical scheme:

The utility model provides a no main bars battery piece string welding machine for concatenate the battery piece into battery string, the battery piece is no main bars battery piece, and battery string manufacturing device includes concatenate conveyor, welding area supply device, pad pasting device and battery piece laying device, wherein:

The serial conveying device is provided with a first laying position and a second laying position, and the second laying position is positioned at the back of the first laying position;

The welding strip supply device is used for supplying welding strip groups;

The film pasting device is configured to lay the (i+1) th back adhesive film to the first lay-down position;

The film pasting device is further configured to pull the (i+1) th welding strip group from the welding strip supply device and lay the (i+1) th welding strip group towards the first laying position and the second laying position, wherein the second half section of the (i+1) th welding strip group is placed on the (i+1) th back adhesive film, and the first half section of the (i+1) th welding strip group is placed on the (i) th battery piece positioned at the second laying position;

The battery piece laying device is configured to lay the (i+1) th battery piece to the first laying position, and the (i+1) th back adhesive film bonds the second half section of the (i+1) th welding band group to the back of the (i+1) th battery piece;

The film pasting device is further configured to lay an ith front adhesive film to the second laying position, and the ith front adhesive film bonds the front half section of the (i+1) th welding strip group to the front face of the ith battery piece;

The tandem conveyor is configured to step a predetermined distance back so that the (i+1) th battery piece and the (i+1) th adhesive film back step from the first lay-down position to the second lay-down position to free the first lay-down position.

The application provides a non-main grid battery piece stringer, which is characterized in that a back adhesive film and a front adhesive film are inserted in the laying and stacking process of non-main grid battery pieces and welding strips, so that corresponding welding strip sections can be adhered to battery pieces after the adhesive films are laid, and the adhesive strength of the adhesive films is greater than the connecting force of the welding strips and the non-main grid battery pieces after welding, so that the welding strips and the battery pieces can be prevented from being separated in the conveying process after stringing. Particularly, the film pasting mechanism has the functions of welding the tape, the back adhesive film and the front adhesive film, so that the structure of the main grid-free battery piece stringing machine is simpler and more compact.

In some embodiments, the solder strip supply device comprises a solder strip supply mechanism, a solder strip clamping mechanism, a solder strip cutting mechanism and a solder strip tail clamp which are arranged in front of the serial conveying device and are sequentially arranged along the conveying direction of the serial conveying device, wherein:

The welding strip supply mechanism is used for supplying a plurality of parallel welding strips;

The film pasting device is configured to draw a plurality of welding strips, so that the welding strips sequentially pass through the welding strip clamping mechanism, the welding strip cutting mechanism and the welding strip tail clamp and then enter the serial conveying device;

When the solder strip between the solder strip cutting mechanism and the film pasting device reaches a preset length, the solder strip clamping mechanism is configured to clamp the solder strip, and the solder strip cutting mechanism is configured to cut off the solder strip so as to obtain a solder strip group comprising a plurality of solder strips with preset lengths.

The welding strip supply device realizes automatic supply of the welding strip group with a preset length through the matching of the welding strip supply mechanism, the welding strip clamping mechanism, the welding strip cutting mechanism and the welding strip tail clamp.

In some embodiments, a solder strip tail clip includes a jaw mounting plate, a plurality of jaw assemblies, and a jaw drive mechanism, wherein:

the clamping jaw assemblies are arranged on the clamping jaw mounting plate side by side, each clamping jaw assembly comprises a first clamping jaw and a second clamping jaw which are arranged in pairs, a first avoidance groove close to the upper end of the first clamping jaw is formed in the inner side of the first clamping jaw, and a second avoidance groove close to the upper end of the second clamping jaw and opposite to the first avoidance groove is formed in the inner side of the second clamping jaw;

the clamping jaw driving mechanism is used for synchronously driving the upper ends of the first clamping jaws and the upper ends of the corresponding second clamping jaws to be fully opened, semi-opened or closed, wherein when the upper ends of the first clamping jaws and the upper ends of the corresponding second clamping jaws are fully opened, an avoidance space for a back adhesive film to pass through is formed between the first avoidance groove and the second avoidance groove; when the upper end of the first clamping jaw and the upper end of the corresponding second clamping jaw are half-opened, a clamping space for a welding strip to enter is formed between the upper end of the first clamping jaw and the upper end of the corresponding second clamping jaw; when the upper ends of the first clamping jaws and the corresponding second clamping jaws are closed, the welding strip is elastically clamped by the upper ends of the first clamping jaws and the corresponding second clamping jaws, and the welding strip is slightly clamped so as to be pulled and guided.

The welding belt tail clamp is arranged, so that the welding belt tail clamp can clamp and guide the welding belt group, the welding belt is prevented from moving during traction, and the welding belt group can be accurately paved to a first paving position and a second paving position.

Optionally, a plurality of rotating shafts corresponding to the clamping jaw assemblies one by one are arranged on the clamping jaw mounting plate side by side, the first clamping jaw and the second clamping jaw of each clamping jaw assembly are rotatably mounted on the corresponding rotating shafts, and a spring is connected between the lower end of the first clamping jaw and the lower end of the second clamping jaw; the clamping jaw driving mechanism comprises a pressing plate and a lifting driving piece, wherein: the pressing plate is connected to the movable part of the lifting driving piece and is in transmission connection with the lower end of the first clamping jaw and the lower end of the second clamping jaw; the lifting driving piece is used for driving the pressing plate to lift; when the lifting driving piece drives the pressing plate to reach the first height, the pressing plate drives the lower end of the corresponding first clamping jaw and the lower end of the corresponding second clamping jaw to be completely closed, so that the upper end of the first clamping jaw and the upper end of the second clamping jaw are completely opened, and the spring is completely compressed; when the lifting driving piece drives the pressing plate to reach the second height, the pressing plate drives the lower end of the corresponding first clamping jaw and the lower end of the corresponding second clamping jaw to be semi-closed, so that the upper end of the first clamping jaw and the upper end of the second clamping jaw are semi-opened, and the spring is semi-compressed; when the lifting driving piece drives the pressing plate to reach the third height, the spring is in decompression reset, and the lower end of the corresponding first clamping jaw and the lower end of the second clamping jaw are pushed to open so as to drive the upper end of the first clamping jaw and the upper end of the second clamping jaw to close; wherein the first height is higher than the second height, and the second height is higher than the third height.

Therefore, the clamping jaw mounting plate and the clamping jaw driving mechanism are arranged, so that the clamping jaw driving mechanism can synchronously drive the upper ends of the first clamping jaws and the upper ends of the corresponding second clamping jaws to be completely opened, semi-opened or closed.

In some embodiments, the battery piece placement apparatus includes a battery piece transport mechanism, a detection mechanism, a battery piece handling mechanism, and a NG piece magazine, wherein: the battery piece conveying mechanism is used for conveying the battery pieces towards the serial conveying device, and at least a detection station and a carrying station are sequentially arranged on a conveying path of the battery piece conveying mechanism; the detection mechanism is arranged at the detection station and used for detecting the quality of the battery piece conveyed to the detection station; the battery piece carrying mechanism is used for picking up the qualified battery pieces which are conveyed to the carrying station and laying the picked up qualified battery pieces to a first laying position; and the NG sheet material box is positioned at the discharge end of the battery sheet conveying mechanism and is used for recycling and detecting unqualified NG battery sheets.

Through setting up the battery piece device of laying to including battery piece conveying mechanism, detection mechanism, battery piece transport mechanism and NG piece magazine, ensure that the battery piece device of laying only lays qualified battery piece to first position of laying to promote the qualification rate of battery cluster.

In some embodiments, the film laminating apparatus includes a film supply mechanism, a first film laminating mechanism, and a second film laminating mechanism, wherein: the adhesive film supply mechanism is used for supplying a back adhesive film and a front adhesive film; the first film pasting mechanism is used for obtaining a back adhesive film from the adhesive film supply mechanism and laying the obtained back adhesive film to a first laying position; the first film pasting mechanism is also used for obtaining the welding strip group supplied by the welding strip supply device, and laying the obtained welding strip group to a first laying position and a second laying position, so that a back adhesive film positioned at the first laying position is pasted on the second half section of the welding strip group, and the first half section of the welding strip group is overlapped on a battery piece positioned at the second laying position; the second film pasting mechanism is used for obtaining the front adhesive film from the adhesive film supply mechanism and laying the obtained front adhesive film to a second laying position, so that the front adhesive film is used for pasting the first half section of the welding strip group on the battery piece positioned at the second laying position.

The first film pasting mechanism and the second film pasting mechanism respectively obtain a back adhesive film and a front adhesive film from the adhesive film supply mechanism, and alternately finish the laying of the back adhesive film and the front adhesive film, so that the adhesive film laying efficiency is improved. In addition, the first film pasting mechanism also completes the laying of the welding strip group, so that the utilization rate of the motion module is higher.

In some embodiments, the film supply mechanism includes a discharge portion, a first film output portion, and a second film output portion, wherein: the discharging part is used for respectively supplying the adhesive films to the first adhesive film output part and the first adhesive film output part; the first adhesive film output part is used for outputting and cutting the adhesive film so as to obtain a back adhesive film with a preset length; the second adhesive film output part is used for outputting and cutting the adhesive film so as to obtain a front adhesive film with a preset length; the first film pasting mechanism obtains a back adhesive film from the first adhesive film output part, and the second film pasting mechanism obtains a front adhesive film from the second adhesive film output part.

By arranging the adhesive film supply mechanism, the adhesive film supply mechanism realizes continuous and stable supply of the front adhesive film and the back adhesive film.

In some embodiments, the first adhesive film output portion and the second adhesive film output portion have the same structure, and the first adhesive film output portion includes a mounting bracket, a pressing driving portion, a rotation driving portion, a pressing roller, an output roller, a guide plate, and a cutting portion, wherein: the guide plate is horizontally connected to the mounting bracket; the pressing driving part and the rotating driving part are arranged on the mounting bracket; the output roller is arranged on the mounting bracket and is close to the end part of the guide plate; the compression roller is rotatably connected to the driving end of the downward-pressing driving part and is in transmission connection with the driving end of the rotary driving part, the compression roller is positioned above the output roller and is parallel to the output roller, and an output gap for the adhesive film to pass through is formed between the compression roller and the output roller; the adhesive film discharged by the discharging part enters the output gap, and the rotary driving part is used for driving the press roller to rotate so as to output the adhesive film to the guide plate; the cutting part is arranged on the mounting bracket and is close to the output gap, and the cutting part is used for cutting off the adhesive film to obtain the back adhesive film with the preset length when the adhesive film with the preset length is output onto the guide plate.

By arranging the first adhesive film output part and the second adhesive film output part, the first adhesive film output part and the second adhesive film output part can continuously output and cut off the adhesive films, so that back adhesive films and front adhesive films with preset lengths can be obtained in batches. The obtained back adhesive film and the front adhesive film are borne on the guide plate, so that the first film pasting mechanism and the second film pasting mechanism can be picked up accurately.

In some embodiments, the discharge section discharges a plurality of parallel adhesive films; a plurality of guide grooves which are in one-to-one correspondence with the adhesive films are arranged on the guide plate, and each guide groove is used for accommodating the corresponding adhesive film; the cutting portion includes a cutting driving piece and a cutting plate, wherein: the cutting driving piece is arranged on the mounting bracket; the cutting plate is connected to the driving end of the cutting driving piece, and a plurality of cutters which correspond to the guide grooves one by one are arranged at the bottom of the cutting plate side by side; when the cutting driving piece drives the cutting plate to descend towards the guide plate, the cutter enters the corresponding guide groove to cut off the adhesive film positioned in the guide groove.

The back adhesive film and the front adhesive film can be whole adhesive films or a plurality of parallel narrow adhesive films, and each narrow adhesive film at least applies one welding strip to the battery piece. To the condition of many glued membrane, through setting up multichannel guide way on the deflector to through setting up cutting the driving piece, cut the driving piece and realized cutting many glued membrane in step, and ensure that every glued membrane is all cut off. In addition, the glue film is guaranteed to be in the corresponding guide slot, and the glue film is prevented from generating position deviation.

In some embodiments, the discharge portion includes a first discharge portion for supplying the adhesive film to the first adhesive film output portion and a second discharge portion for supplying the adhesive film to the second adhesive film output portion.

Realizes synchronous feeding of the first adhesive film output part and the second adhesive film output part.

In some embodiments, the first film pasting mechanism comprises a first translation driving module, a mounting bottom plate, a first lifting driving module, a second lifting driving module, a first adsorption component and a welding strip traction component, wherein: the mounting bottom plate is connected to the driving end of the first translation driving module; the first lifting driving module and the second lifting driving module are arranged on the mounting bottom plate side by side along the conveying direction of the serial conveying device; the first adsorption component is connected to the driving end of the first lifting driving module, and the welding strip traction component is connected to the driving end of the second lifting driving module; the first translation driving module is configured to cooperate with the first lifting driving module to drive the first adsorption assembly to translate and lift along the conveying direction of the serial conveying device so as to drive the first adsorption assembly to suck the back adhesive film from the first adhesive film output part and lay the back adhesive film to the first laying position; the first translation driving module is also configured to drive the welding strip traction assembly to translate and lift along the conveying direction of the serial conveying device in cooperation with the second lifting driving module so as to drive the welding strip traction assembly to receive the welding strip group supplied by the welding strip supply device and lay the welding strip group to the first laying position and the second laying position.

The first adsorption component and the welding belt traction component can independently lay back adhesive films and welding belt groups under the drive of the first translation driving module and the corresponding lifting driving module, so that the adhesive films and the welding belt groups are orderly stacked.

In some embodiments, the first adsorption assembly comprises a second translational drive module and a first adsorption plate, wherein: the second translation driving module is connected to the driving end of the first lifting driving module, and the first adsorption plate is connected to the driving end of the second translation driving module; the first adsorption plate is used for adsorbing the back adhesive film, and the second translation driving module is used for driving the first adsorption plate to translate along the conveying direction of the serial conveying device.

The first adsorption plate is driven to translate through the second translation driving module, so that the first adsorption plate can pass through the welding belt traction assembly in a translating manner, and the back adhesive film is picked up and laid.

In some embodiments, the second film pasting mechanism comprises a third translation driving module, a third lifting driving module and a second adsorption plate, wherein: the second adsorption plate is connected to the driving end of the second lifting driving module; the third translation driving module is configured to drive the second adsorption plate to translate and lift along the conveying direction of the serial conveying device in cooperation with the third lifting driving module so as to drive the second adsorption plate to suck the front adhesive film from the second adhesive film output part and lay the front adhesive film to a second laying position.

The third translation driving module and the third lifting driving module are matched to drive the second adsorption plate to translate and lift, so that the second adsorption plate can absorb the front adhesive film from the second adhesive film output part and lay the front adhesive film to a second laying position.

Drawings

Fig. 1 is a schematic structural diagram of a non-main grid cell series welding machine under a view angle in an embodiment of the application;

fig. 2 is a schematic structural diagram of a non-main grid cell string welding machine according to an embodiment of the present application at another view angle;

FIG. 3 is a schematic view of a solder tail clip according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a film laminating apparatus according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a first film laminating mechanism according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a first output portion of a first adhesive film according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a first output portion of a plastic film under a second view angle according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a structure of the first film output unit under a third view angle according to an embodiment of the present application;

FIG. 9 is a schematic view of a second adsorption plate according to an embodiment of the present application;

Fig. 10 is a schematic structural view of a second adsorption plate according to an embodiment of the present application at another view angle;

FIG. 11 is a schematic diagram of a placement process of a cell string without a primary grid in an embodiment of the application;

Fig. 1 to 11 include:

Tandem conveyor 1

Solder strip supply device 2:

Welding strip tail clamp 21: jaw mounting plate 211, jaw drive mechanism 212, first jaw 213, second jaw 214, first relief slot 215, second relief slot 216, platen 217, and lift drive 218;

Film sticking device 3:

Adhesive film supply mechanism 31:

A discharging part 311;

a slide rail 312;

A first film output section 313: a connection bracket 3131, a pressing drive portion 3132, a rotation drive portion 3133, a pressing roller 3134, an output roller 3135, a guide plate 3136, a guide groove 3137, a cutting drive member 3138, a cutting plate 3139, and a cutter 3130;

Second film output unit 314:

First film attachment mechanism 32:

A mounting base 321;

A first lifting driving module 322;

A second lift driving module 323;

First suction assembly 324: a second translational drive module 3241 and a first adsorption plate 3242;

A solder ribbon pull assembly 325;

Second film sticking mechanism 33:

A third translation driving module 331;

a third lifting driving module 332;

a second adsorption plate 333;

Cell placement device 4:

A battery piece conveying mechanism 41, a detecting mechanism 42, and a battery piece conveying mechanism 43;

A heating device 5.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description.

By adopting the traditional series connection mode, the welding strip and the battery piece without the main grid cannot form firm connection after being welded, the bonding force between the welding strip and the battery piece without the main grid is poor, and the welding strip is easy to separate from the battery piece without the main grid in the subsequent battery string carrying process, so that the production and the manufacturing of a battery assembly are finally affected.

For this reason, the present application provides a non-main grid cell string welder, and an example of the non-main grid cell string welder provided by the present application will be described below.

The application provides a battery piece series welding machine without a main grid, which is used for connecting battery pieces (hereinafter referred to as battery pieces) without the main grid in series into a battery string. As shown in fig. 1, 2 and 11, the main grid-free battery piece series welding machine in the embodiment of the application comprises a series conveying device 1, a welding strip supply device 2, a film pasting device 3 and a battery piece laying device 4, wherein:

The serial conveying device 1 is provided with a first laying position A and a second laying position B, and the second laying position B is positioned behind the first laying position A.

The solder ribbon supply device 2 is used for supplying solder ribbon sets.

The film laminating device 3 is configured to deposit the (i+1) th adhesive film on the first deposition position A.

The film laminating device 3 is further configured to pull the (i+1) th solder strip group from the solder strip supply device 2 and deposit the (i+1) th solder strip group to the first deposit position a and the second deposit position B, wherein the second half of the (i+1) th solder strip group is placed on the (i+1) th back adhesive film and the first half of the (i+1) th solder strip group is placed on the (i) th battery piece located at the second deposit position B.

The battery piece placement device 4 is configured to place the i+1th battery piece to the first placement position a, and the i+1th back adhesive film adheres the second half section of the i+1th solder strip group to the back of the i+1th battery piece.

The film laminating device 3 is further configured to deposit an ith front adhesive film to the second deposition position B, the ith front adhesive film adhering the first half section of the (i+1) th solder strip group to the front face of the ith battery cell.

The tandem conveyor 1 is configured to step back a predetermined distance such that the i+1th battery sheet and the i+1th back side adhesive film step from the first lay-down position a to the second lay-down position B to free the first lay-down position a. The stepping direction of the tandem conveyor 1 is indicated by the arrows in fig. 1 and 2.

In order to enable those skilled in the art to more clearly understand the operation of the tandem connection machine for battery cells without main grid in the embodiment of the present application, the following will describe the laying process of the battery cells 30, the welding set 20, the back adhesive film 10 and the front adhesive film 40 in the embodiment of the present application with reference to fig. 11:

as shown in fig. 11 (a), in the initial state, both the first laying position a and the second laying position B of the tandem conveyor 1 are in the free state.

As shown in fig. 11 (b), the film laminating apparatus 3 deposits the 1 st back adhesive film 10 to the first deposit position a.

As shown in fig. 11 (c), the film laminating device 3 deposits the 1 st solder ribbon set 20 to the first deposit position a and the second deposit position B, in which: the second half of the 1 st welding set 20 is placed on the 1 st back adhesive film 10, and the first half of the 1 st welding set 20 is placed on the tandem conveyor 1.

As shown in fig. 11 (d), the battery piece placement device 4 places the 1 st battery piece 30 toward the first placement position a, and the 1 st back adhesive film 10 adheres the second half of the 1 st solder ribbon set 20 to the back of the 1 st battery piece 30.

As shown in (e) of fig. 11, the tandem conveyor 1 steps a predetermined distance backward so that the 1 st battery sheet 30 and the 1 st adhesive film 10 step from the first laying position a to the second laying position B to free the first laying position a. Next, the film laminating device 3 deposits the 2 nd back adhesive film 10 to the first deposit position a.

As shown in (f) of fig. 11, the film laminating device 3 deposits the 2 nd solder ribbon set 20 to the first deposit position a and the second deposit position B, wherein: the second half of the 2 nd set of solder strips 20 is placed on the 2 nd backing film 10 and the first half of the 2 nd set of solder strips 20 is placed on the 1 st battery piece 30 at the second lay-down position B.

As shown in fig. 11 (g), the battery piece placement device 4 places the 2 nd battery piece 30 toward the first placement position a, and the 2 nd adhesive film 10 bonds the second half of the 2 nd solder tape group 20 to the back of the 2 nd battery piece 30. The film pasting device 3 lays the 1 st front adhesive film 40 to the second laying position B, and the 1 st front adhesive film 40 bonds the first half section of the 2 nd welding strip group 20 to the front of the 1 st battery piece 30. In order to improve the laying efficiency, the 2 nd battery piece and the 1 st front adhesive film can be laid at the same time.

As shown in (h) of fig. 11, the tandem conveyor 1 steps a predetermined distance backward so that the 2 nd battery sheet 30 and the 2 nd adhesive film 10 step from the first laying position a to the second laying position B to free the first laying position a. Next, the film laminating device 3 deposits the 3 rd back adhesive film 10 to the first deposit position a.

As shown in (i) of fig. 11, the film laminating device 3 deposits the 3 rd solder ribbon set 20 to the first deposit position a and the second deposit position B, wherein: the second half of the 3 rd solder ribbon set 20 is placed on the 3 rd back side adhesive film 10 and the first half of the 3 rd solder ribbon set 20 is placed on the 2 nd battery cell 30 at the second placement position B.

As shown in (j) of fig. 11, the battery piece placement device 4 places the 3 rd battery piece 30 toward the first placement position a, and the 3 rd back adhesive film 10 adheres the second half of the 3 rd solder tape group 20 to the back of the 3 rd battery piece 30. The film pasting device 3 lays the 2 nd front adhesive film 40 to the second laying position B, and the 2 nd front adhesive film 40 bonds the first half section of the 3 rd welding strip set 20 to the front of the 2 nd battery piece 30. Similarly, to improve the laying efficiency, the 3 rd battery plate 30 and the 2 nd front adhesive film 40 may be laid at the same time.

As shown in (k) of fig. 11, the tandem conveyor 1 is configured to step back by a predetermined distance such that the 3 rd battery sheet 30 and the 3 rd adhesive film 10 step from the first placement position a to the second placement position B to free the first placement position a. Next, the film laminating device 3 deposits the 4 th adhesive film 10 on the back surface to the first deposit position a.

As shown in fig. 11 (l), the film laminating device 3 deposits the 4 th solder ribbon set 20 to the first deposit position a and the second deposit position B, in which: the second half of the 4 th weld set 20 is placed on the 4 th back side adhesive film 10 and the first half of the 4 th weld set 20 is placed on the 3 rd battery cell 30 at the second placement position B.

Repeating the steps until all the battery pieces, the welding strip groups, the back adhesive film and the front adhesive film are laid.

According to the non-main grid battery piece stringer provided by the embodiment of the application, the back adhesive film and the front adhesive film are inserted in the laying and stacking process of the non-main grid battery piece and the welding strip, so that the corresponding welding strip section can be adhered to the battery piece after the adhesive film is laid, and the bonding strength of the adhesive film is greater than the connecting force of the welding strip and the non-main grid battery piece after welding, so that the welding strip and the battery piece are prevented from being separated in the conveying process after stringing. Particularly, the film pasting mechanism has the functions of welding the tape, the back adhesive film and the front adhesive film, so that the structure of the main grid-free battery piece stringing machine is simpler and more compact.

Optionally, as shown in fig. 1 and 2, the tandem conveyor 1 is further provided with a hot pressing position located downstream of the second laying position B. Correspondingly, the battery piece series welding machine without the main grid in the embodiment of the application further comprises a hot pressing device 5 which is arranged above the pressing position and can be lifted. The hot pressing device 5 is used for pressing and heating the battery piece which is conveyed to the pressing position and is adhered with the back adhesive film and the front adhesive film, so that the back adhesive film and the front adhesive film are released to be sufficiently sticky, and the adhesive strength between the battery piece and the battery piece is improved.

Optionally, the welding strip supply device 2 includes a welding strip supply mechanism, a welding strip clamping mechanism, a welding strip cutting mechanism and a welding strip tail clamp, which are disposed in the front path of the serial conveying device and sequentially disposed along the conveying direction of the serial conveying device, wherein: the welding strip supply mechanism is used for supplying a plurality of parallel welding strips. The film pasting device 3 is configured with a plurality of welding strips supplied by a traction welding strip supply mechanism, so that the plurality of welding strips sequentially pass through a welding strip clamping mechanism, a welding strip cutting mechanism and a welding strip tail clamp and then enter the serial conveying device 1.

When the solder tape between the solder tape cutting mechanism and the film attaching device 3 reaches a predetermined length, the solder tape clamping mechanism is configured to clamp the solder tape, and the solder tape cutting mechanism is configured to cut the solder tape to obtain a solder tape set including a plurality of solder tapes having the predetermined length.

It can be seen that the welding strip supply device 2 realizes automatic supply of the welding strip set having a predetermined length by cooperation of the welding strip supply mechanism, the welding strip clamping mechanism, the welding strip cutting mechanism, and the welding strip tail clamp.

The tail clamp realizes clamping and guiding of the welding strip group, so that the film pasting device 3 can smoothly lay the welding strip group to the first laying position A and the second laying position B.

In addition, since the tail clip is close to the first laying position a, the film pasting device 3 needs to place the back adhesive film to the first laying position a, so that the existing conventional tail clip is adopted, and the back adhesive film is easy to lay.

To solve this problem, a new tail clip structure is provided in the embodiment of the present application, as shown in fig. 3, the tail clip 21 in the embodiment of the present application includes a jaw mounting plate 211, a plurality of jaw assemblies and a jaw driving mechanism 212, wherein:

A plurality of clamping jaw assemblies are arranged side by side on clamping jaw mounting plate 211, each clamping jaw assembly comprises a first clamping jaw 213 and a second clamping jaw 214 which are arranged in pairs, and particularly, the inner side of first clamping jaw 213 is provided with a first avoidance groove 215 which is close to the upper end of first clamping jaw 213, and the inner side of second clamping jaw 214 is provided with a second avoidance groove 216 which is close to the upper end of second clamping jaw 214 and is opposite to first avoidance groove 215.

Jaw actuation mechanism 212 is configured to simultaneously actuate the full opening, half opening, or closing of the upper end of each first jaw 213 and the upper end of a corresponding second jaw 214, wherein:

When the film laminating device 3 needs to place the back adhesive film at the first placement position a, the jaw driving mechanism 212 drives the upper end of the first jaw 213 and the upper end of the corresponding second jaw 214 to be fully opened, and at this time, a large enough avoiding space for the back adhesive film to pass through is formed between the first avoiding groove 215 and the second avoiding groove 216. Thereby ensuring that the film laminating device 3 can smoothly place the back adhesive film to the first placement position a.

When the film pasting device 3 needs to lay the welding strip set to the first laying position a and the second laying position B, the clamping jaw driving mechanism 212 drives the upper ends of the first clamping jaws 213 and the corresponding second clamping jaws 214 to be half-opened, so that a clamping space for the welding strip to enter is formed between the upper ends of the first clamping jaws 213 and the corresponding second clamping jaws 214, and the film pasting device 3 controls the drawn welding strip set to descend, so that each welding strip enters the corresponding clamping space.

Next, jaw drive mechanism 212 drives the upper ends of first jaws 213 closed with the upper ends of corresponding second jaws 214 such that the upper ends of first jaws 213 grip the weld strip with the upper ends of corresponding second jaws 214 to effect gripping and guiding of the weld strip. Finally, the film pasting device 3 is ensured to lay the welding strip group to the first laying position A and the second laying position B.

Optionally, a plurality of shafts corresponding to the jaw assemblies one by one are arranged on the jaw mounting plate 211 side by side, the first jaw 213 and the second jaw 214 of each jaw assembly are rotatably mounted on the corresponding shafts, and a spring is connected between the lower end of the first jaw 213 and the lower end of the second jaw 214. Jaw drive mechanism 212 includes a platen 217 and a lift drive 218, wherein:

A pressure plate 217 is connected to the movable part of the lifting drive 218, the pressure plate 217 being in driving connection with the lower end of the first clamping jaw 213 and the lower end of the second clamping jaw 214. Optionally, press plates 217 are provided with press wheel sets corresponding to the jaw assemblies one to one, each press wheel set includes a first press wheel and a second press wheel which are arranged in pairs, a press-connection space is formed between the first press wheel and the second press wheel, the lower ends of first clamping jaws 213 and the lower ends of second clamping jaws 214 are inserted into the press-connection space, wherein the lower ends of first clamping jaws 213 are elastically pressed against the first press wheel under the extrusion of springs, and the lower ends of second clamping jaws 214 are elastically pressed against the second press wheel under the extrusion of springs.

The lifting driving piece 218 is used for driving the pressing plate 217 to lift, wherein:

when lift drive 218 drives pressure plate 217 to a first height (i.e., the highest position), pressure plate 217 drives the lower ends of corresponding first clamping jaw 213 and second clamping jaw 214 fully closed, such that the upper ends of first clamping jaw 213 and second clamping jaw 214 fully open, and such that the springs fully compress.

When lift drive 218 drives pressure plate 217 to the second height, pressure plate 217 drives the lower ends of corresponding first clamping jaw 213 and second clamping jaw 214 toward one another to semi-expand the upper ends of first clamping jaw 213 and second clamping jaw 214 and semi-compress the springs.

When lift drive 218 drives pressure plate 217 to a third height (i.e., the lowest position), the springs are de-compressed and reset, pushing the lower ends of corresponding first clamping jaw 213 and second clamping jaw 214 open, thereby driving the upper ends of first clamping jaw 213 and second clamping jaw 214 closed.

Wherein the first height is higher than the second height, and the second height is higher than the third height.

It can be seen that by providing jaw mounting plate 211 and jaw drive mechanism 212 such that jaw drive mechanism 212 is capable of simultaneously driving the upper end of each first jaw 213 fully open, semi-open or closed with the upper end of corresponding second jaw 214.

As shown in fig. 1 to 2, the battery piece placement device 4 optionally includes a battery piece conveying mechanism 41, a detecting mechanism 42, a battery piece carrying mechanism 43, and a NG piece magazine, wherein:

The battery piece conveying mechanism 41 is used for conveying the battery pieces towards the serial conveying device 1, and at least a detection station and a conveying station are sequentially arranged on a conveying path of the battery piece conveying mechanism 41.

The detecting mechanism 42 is provided at the detecting station for detecting the quality of the battery piece conveyed to the detecting station.

The battery piece handling mechanism 43 is used for picking up the qualified battery pieces which are conveyed to the handling station and laying the picked up qualified battery pieces to the first laying position A.

And the NG sheet material box is positioned at the discharge end of the battery sheet conveying mechanism and is used for recycling and detecting unqualified NG battery sheets.

In this way, the battery piece laying device 4 is arranged in such a way that the quality detection of the battery pieces is realized before the battery pieces are laid by the battery piece laying device 4, so that the battery piece laying device 4 is ensured to only lay qualified battery pieces to the first laying position A, and NG pieces are recovered by the NG piece material box.

As shown in fig. 4, the film laminating apparatus 3 includes an adhesive film supply mechanism 31, a first film laminating mechanism 32, and a second film laminating mechanism 33, wherein:

The film supply mechanism 31 is used for continuously supplying the back film and the front film.

The first film sticking mechanism 32 is used for acquiring a back adhesive film from the adhesive film supply mechanism 31 and laying the acquired back adhesive film to a first laying position a.

The first film pasting mechanism 32 is further used for obtaining the welding strip group supplied by the welding strip supply device 2 and laying the obtained welding strip group to the first laying position a and the second laying position B, so that the back adhesive film positioned at the first laying position a is pasted on the second half section of the welding strip group, and the first half section of the welding strip group is stacked on the battery piece positioned at the second laying position B.

The second film pasting mechanism 33 is used for obtaining the front adhesive film from the adhesive film supply mechanism 31 and laying the obtained front adhesive film to the second laying position B, so that the front adhesive film pastes the first half section of the welding strip group on the battery piece positioned at the second laying position B.

It can be seen that the first film pasting mechanism 32 and the second film pasting mechanism 33 respectively obtain the back adhesive film and the front adhesive film from the adhesive film supply mechanism 31, and alternately complete the laying of the back adhesive film and the front adhesive film, thereby improving the adhesive film laying efficiency. In addition, the first film pasting mechanism 32 also completes the laying of the welding strip group, so that the structure of the film pasting device 3 is simpler, and the cost is saved.

With continued reference to fig. 4, the film supply mechanism 31 may optionally include a discharging portion 311, a first film output portion 313, and a second film output portion 314, where: the discharging portion 311 is used for respectively supplying the adhesive films to the first adhesive film output portion 313 and the first adhesive film output portion 314. The first film output part 313 is used for outputting and cutting the film to obtain a back film having a predetermined length. The second film output portion 314 is used for outputting and cutting the film to obtain a front film with a predetermined length. The first film sticking mechanism 32 acquires a back side film from the first film output portion 313, and the second film sticking mechanism 33 acquires a front side film from the second film output portion 314.

It can be seen that by providing the film supply mechanism 31, the film supply mechanism 31 realizes synchronous supply of the front film and the back film.

Alternatively, the first film output portion 313 and the second film output portion 314 have the same structure. Taking the first film output portion 313 as an example, as shown in fig. 6 to 8, it includes a mounting bracket 3131, a pressing driving portion 3132, a rotation driving portion 3133, a pressing roller 3134, an output roller 315, a guide plate 3136, and a cutting portion, wherein:

the guide plate 3136 is horizontally connected to the mounting bracket 3131. The pressing drive portion 3132 and the rotation drive portion 3133 are both provided on the mounting bracket 3131. The output roller 315 is mounted on the mounting bracket 3131 and is near the end of the guide plate 3136. The pressing roller 3134 is rotatably connected to the driving end of the pressing driving part 3132 and is in transmission connection with the driving end of the rotation driving part 3133, the pressing roller 3134 is located above the output roller 315 and is parallel to the output roller 315, and an output gap for passing the adhesive film is formed between the pressing roller 3134 and the output roller 315.

The adhesive film discharged from the discharging part 311 enters the output gap, and the rotation driving part is used for driving the compression roller 3134 to rotate so as to output the adhesive film to the guide plate 3136. A cutting portion is provided on the mounting bracket 3131 near the output gap, the cutting portion being for cutting off the adhesive film to obtain a back adhesive film of a predetermined length when the adhesive film of a predetermined length is output onto the guide plate 3136.

The first film output portion 313 operates as follows:

First, in the manual adjustment stage, the pressure driving section 3132 controls the pressure roller 3134 to rise, and the end portion of the adhesive film discharged from the discharging section is sent between the pressure roller 3134 and the output roller 315. The pressing drive portion 3132 controls the pressing roller 3134 to descend, pressing the end portion of the adhesive film against the output roller 315.

Then, the rotation driving section drives the pressing roller 3134 to rotate, so that the pressing roller 3134 and the output roller 315 cooperate to pinch and feed the adhesive film onto the guide plate 3136.

When the film of a predetermined length is output onto the guide plate 3136, the cutting portion cuts the film, thereby obtaining a back film of a predetermined length.

By providing the first film output portion 313 and the second film output portion 314, the first film output portion 313 and the second film output portion 314 can continuously output and cut off the films, so as to obtain a back film and a front film with predetermined lengths. The obtained back adhesive film and front adhesive film are carried on the guide plate 3136, thereby facilitating the pickup of the first film sticking mechanism 32 and the second film sticking mechanism 33.

In order to enable the adhesive film discharged from the discharging part to smoothly enter the output gap between the pressing roller 3134 and the output roller 315, optionally, the first adhesive film output part 313 further includes a plurality of guide rollers disposed on the mounting bracket 3131, and the adhesive film discharged from the discharging part bypasses the guide rollers and enters the output gap under the guidance of the guide rollers.

The back adhesive film and the front adhesive film can be whole adhesive films or a plurality of parallel narrow adhesive films, wherein each narrow adhesive film at least applies one welding strip to the battery piece, and compared with the whole adhesive film, the adhesive film can reduce the adhesive film usage amount and the cost.

In order to guide and cut off the multiple adhesive films, as shown in fig. 6 to 8, optionally, a plurality of guide grooves 3137 corresponding to the multiple parallel adhesive films discharged by the discharging part 311 are provided on the guide plate 3136, and each guide groove 3137 is used for accommodating a corresponding adhesive film so as to guide the corresponding adhesive film.

The cutting portion includes a cutting driver 3138 and a cutting plate 3139, wherein: the cutting driver 3138 is provided on the mounting bracket 3131. The cutting plate 3139 is connected to a driving end of the cutting driving member 3138, and a plurality of cutters 3130, which are in one-to-one correspondence with the guide grooves 3137, are provided side by side at the bottom of the cutting plate 3139.

When the cutter driving member 3138 drives the cutter plate 3139 to descend toward the guide plate 3136, each cutter 3130 enters into the corresponding guide groove 3137 to cut off the adhesive film located in the guide groove 3137.

Optionally, the discharging portion 311 includes a first discharging portion and a second discharging portion, where the first discharging portion is used to supply the adhesive film to the first adhesive film output portion 313, and the second discharging portion is used to supply the adhesive film to the second adhesive film output portion 314. Thus, the first film output unit 313 and the second film output unit 314 can be synchronously fed.

As shown in fig. 6, alternatively, the mounting brackets of the first film output portion 313 and the second film output portion 314 are connected side by side to a slide rail 312 extending in the conveying direction of the welding conveying device 1, and can slide along the slide rail 312 to perform position adjustment.

As shown in fig. 5, optionally, the first film pasting mechanism 32 includes a first translation driving module (not shown in the drawing), a mounting base 321, a first lifting driving module 322, a second lifting driving module 323, a first adsorbing component 324 and a solder strip pulling component 325, wherein:

The mounting base 321 is connected to the driving end of the first translational driving module.

The first lifting driving module 322 and the second lifting driving module 323 are arranged on the mounting base plate 321 side by side along the conveying direction of the serial conveying device 1.

The first suction assembly 324 is connected to the driving end of the first lift driving module 322, and the solder ribbon pulling assembly 325 is connected to the driving end of the second lift driving module 323.

The first translation driving module is configured to cooperate with the first lifting driving module 322 to drive the first adsorption assembly 324 to translate and lift along the conveying direction of the serial conveying device 1, so as to drive the first adsorption assembly 324 to suck the back adhesive film from the first adhesive film output portion 313 and lay the back adhesive film to the first laying position a.

The first translational driving module is further configured to cooperate with the second lifting driving module 323 to drive the solder strip drawing assembly 325 to translate and lift along the conveying direction of the serial conveying device 1, so as to drive the solder strip drawing assembly 325 to receive the solder strip group supplied by the solder strip supply device 2 and lay the solder strip group towards the first laying position a and the second laying position B.

It can be seen that the first adsorption component 324 and the solder strip traction component 325 can independently perform the laying of the back adhesive film and the laying of the solder strip group under the driving of the first translation driving module and the corresponding lifting driving module, so that the first film pasting mechanism 32 has the functions of both the back adhesive film and the solder strip group laying.

Optionally, the first suction assembly 324 includes a second translational drive module 3241 and a first suction plate 3242, wherein: the second translational driving module 3241 is connected to the driving end of the first elevating driving module 322, and the first adsorption plate 3242 is connected to the driving end of the second translational driving module 3241.

The first adsorption plate 3242 is used for adsorbing the back adhesive film, and the second translation driving module 3241 is used for driving the first adsorption plate 3242 to translate along the conveying direction of the serial conveying device 1, so that the first adsorption plate 3242 can pass over the welding belt traction assembly 225 to suck and lay the back adhesive film.

Optionally, the structure of the second film pasting mechanism 33 is similar to that of the first film pasting mechanism 312, and includes a third translation driving module 331, a third lifting driving module 332 and a second adsorption plate 333, wherein: the third lifting driving module 332 is connected to the driving end of the third translation driving module 331, and the second adsorption plate 333 is connected to the driving end of the third lifting driving module 332. The third translation driving module 331 is configured to cooperate with the third lifting driving module 332 to drive the second adsorption plate 333 to translate and lift along the conveying direction of the serial conveying device 1, so as to drive the second adsorption plate 333 to suck the front adhesive film from the second adhesive film output portion 314 and lay the front adhesive film to the second laying position B.

The third translation driving module 331 and the third lifting driving module 332 cooperate to drive the second adsorption plate 333 to translate and lift, so that the second adsorption plate 333 can absorb the front adhesive film from the second adhesive film output portion 314 and lay the front adhesive film to the second laying position B.

As described previously, the second film sticking mechanism 33 needs to lay the front adhesive film onto the battery sheet at the second laying position B so that the first half of the solder tape set is adhered to the front face of the battery sheet. That is, the second suction plate 333 needs to press the front adhesive film to the front of the battery cell.

The conventional adsorption plate adsorbs and applies the adhesive film by using a metal strip with adsorption holes, but the metal strip is of a rigid structure, and when the adhesive film is pressed to a welding strip on a battery piece, the adhesive film can only be applied to the welding strip and cannot contact the battery piece. To this end, an embodiment of the present utility model provides a structure for implementing the second adsorption plate 333, as shown in fig. 9 to 10, which includes a substrate 334 and a plurality of adsorption elements 335, wherein: the substrate 334 is connected to a driving end of the third lifting driving module 332. The absorbing members 335 are arranged on the base plate 334 at intervals, the absorbing members 335 are provided with flexible absorbing surfaces for absorbing the back adhesive film, the absorbing members 335 are internally provided with air exhaust channels, and the flexible absorbing surfaces are provided with a plurality of absorbing holes 3351 communicated with the air exhaust channels. The air suction air path is used for sucking air from the adsorption holes 3351 so that the adsorption force is generated on the flexible adsorption surface.

Because the adsorption member 335 has a flexible adsorption surface, when the second adsorption plate 333 presses the front adhesive film to the battery plate, the front adhesive film first contacts the welding strip group, and as the second adsorption plate 333 continues to press down, the welding strip group gradually falls into the flexible adsorption surface, so that the flexible adsorption surface can finally contact the battery plate, and the front adhesive film is finally ensured to be applied to the surface of the battery plate.

Optionally, the adsorbing member 335 includes an adsorbing block 3352, a flexible adsorbing strip 3353 and a sucking disc 3354, wherein: the adsorption block 3352 is mounted on the substrate 334, and the air exhaust path is provided in the adsorption block 3352. The flexible adsorption strip 3353 is attached to the adsorption block 3352, the adsorption holes 3351 are formed in the flexible adsorption strip 3353 and penetrate through the flexible adsorption strip 3353, and the surface of the flexible adsorption strip 3353 far away from the adsorption block 3352 forms a flexible adsorption surface. The suckers 3354 are disposed on the substrate 334 and located at two ends of the flexible adsorption strip 3353, and are used for cooperating with the flexible adsorption strip to adsorb the back adhesive film.

Because the flexible adsorption strip 3353 is attached to the adsorption block 3352, the flexible adsorption strip 3353 can be conveniently replaced after long-term use and aging. Optionally, the lowest point of the suction cup 3354 is lower than the flexible adsorption strip 3353, so that when the application is completed and the adsorption member 335 is separated from the welding strip, the adhesive film is not carried up by the flexible adsorption strip 3353, resulting in damaging the application effect.

Optionally, the air extraction path extends along the arrangement direction of the adsorption holes 3351, the first end of the air extraction path is closed, and the second end forms an extraction opening connected with the air extraction pipeline. The air suction pipeline performs synchronous air suction on the air suction channels in all the adsorption blocks 3352, so that all the flexible adsorption strips 3353 generate adsorption force.

The sucking discs 3354 arranged at the two ends of the flexible adsorption strip 3353 can be matched with the flexible adsorption strip 3353 to adsorb the front adhesive films from the two ends, so that the front adhesive films are prevented from being separated from the flexible adsorption strip 3353 in the moving process.

The application has been described above in sufficient detail with a certain degree of particularity. It will be appreciated by those of ordinary skill in the art that the descriptions of the embodiments are merely exemplary and that all changes that come within the true spirit and scope of the application are desired to be protected. The scope of the application is indicated by the appended claims rather than by the foregoing description of the embodiments.

Claims

1. The utility model provides a no main bars battery piece string welding machine, its characterized in that is used for concatenating the battery piece into the battery string, the battery piece is no main bars battery piece, no main bars battery piece string welding machine includes concatenates conveyor, welding area supply device, pad pasting device and battery piece laying device, wherein:

the serial conveying device is provided with a first laying position and a second laying position, and the second laying position is positioned behind the first laying position;

The welding strip supply device is used for supplying a welding strip group;

The film pasting device is configured to lay an (i+1) th back adhesive film to the first lay-down position, wherein i is a natural number larger than 0;

The film pasting device is further configured to pull an (i+1) th welding strip group from the welding strip supply device and lay the (i+1) th welding strip group to the first laying position and the second laying position, wherein the second half section of the (i+1) th welding strip group is placed on the (i+1) th back adhesive film, and the first half section of the (i+1) th welding strip group is placed on the (i) th battery piece positioned at the second laying position;

The battery piece laying device is configured to lay an (i+1) th battery piece to the first laying position, and the (i+1) th back adhesive film bonds the second half section of the (i+1) th welding band group to the back of the (i+1) th battery piece;

The film pasting device is further configured to lay an ith front adhesive film on the second laying position, and the ith front adhesive film bonds the first half section of the (i+1) th welding strip group to the front surface of the ith battery piece;

The tandem conveyor is configured to step a predetermined distance back such that the (i+1) th battery sheet and the (i+1) th adhesive film are stepped from the first lay-down position to the second lay-down position to free the first lay-down position.

2. The grid-less battery cell string welder of claim 1, wherein the solder strip supply device comprises a solder strip supply mechanism, a solder strip clamping mechanism, a solder strip cutting mechanism, and a solder strip tail clamp disposed in the front path of the serial conveying device and sequentially along the conveying direction of the serial conveying device, wherein:

When the welding strip between the welding strip cutting mechanism and the film pasting device reaches a preset length, the welding strip clamping mechanism is configured to clamp the welding strip, and the welding strip cutting mechanism is configured to cut off the welding strip so as to obtain a welding strip group comprising a plurality of welding strips with preset lengths.

3. The backless battery cell string welder of claim 2, wherein the weld tail clip comprises a jaw mounting plate, a plurality of jaw assemblies, and a jaw drive mechanism, wherein:

the clamping jaw driving mechanism is used for synchronously driving the upper ends of the first clamping jaws and the corresponding upper ends of the second clamping jaws to be fully opened or semi-opened or closed, wherein when the upper ends of the first clamping jaws and the corresponding upper ends of the second clamping jaws are fully opened, an avoidance space for a back adhesive film to pass through is formed between the first avoidance groove and the second avoidance groove; when the upper end of the first clamping jaw and the upper end of the corresponding second clamping jaw are half-opened, a clamping space for a welding strip to enter is formed between the upper end of the first clamping jaw and the upper end of the corresponding second clamping jaw; when the upper ends of the first clamping jaws and the corresponding upper ends of the second clamping jaws are closed, the welding strips are elastically clamped by the upper ends of the first clamping jaws and the corresponding upper ends of the second clamping jaws.

4. The masterless battery cell string welder of claim 3 wherein:

The clamping jaw mounting plate is provided with a plurality of rotating shafts which are in one-to-one correspondence with the clamping jaw assemblies in parallel, the first clamping jaw and the second clamping jaw of each clamping jaw assembly are respectively and rotatably arranged on the corresponding rotating shafts, and a spring is connected between the lower end of the first clamping jaw and the lower end of the second clamping jaw;

the clamping jaw driving mechanism comprises a pressing plate and a lifting driving piece, wherein:

The pressing plate is connected to the movable part of the lifting driving piece, and is in transmission connection with the lower end of the first clamping jaw and the lower end of the second clamping jaw;

The lifting driving piece is used for driving the pressing plate to lift;

When the lifting driving piece drives the pressing plate to reach a first height, the pressing plate drives the lower end of the corresponding first clamping jaw and the lower end of the corresponding second clamping jaw to be completely closed, so that the upper end of the first clamping jaw and the upper end of the second clamping jaw are completely opened, and the spring is completely compressed;

When the lifting driving piece drives the pressing plate to reach the second height, the pressing plate drives the lower ends of the corresponding first clamping jaw and the second clamping jaw to be semi-closed, so that the upper ends of the first clamping jaw and the second clamping jaw are semi-opened, and the spring is semi-compressed;

when the lifting driving piece drives the pressing plate to reach a third height, the spring is in decompression reset, and the lower ends of the corresponding first clamping jaw and the second clamping jaw are pushed to open so as to drive the upper ends of the first clamping jaw and the second clamping jaw to close;

5. The batteryless battery cell string welder of claim 1, wherein the battery cell placement device comprises a battery cell transport mechanism, a detection mechanism, a battery cell handling mechanism, and a NG cell magazine, wherein:

The battery piece conveying mechanism is used for conveying the battery pieces towards the serial conveying device, and at least a detection station and a carrying station are sequentially arranged on a conveying path of the battery piece conveying mechanism;

The detection mechanism is arranged at the detection station and is used for detecting the quality of the battery piece conveyed to the detection station;

The battery piece carrying mechanism is used for picking up the battery pieces which are conveyed to the carrying station and are qualified in detection, and laying the picked battery pieces which are qualified in detection to the first laying position;

and the NG sheet material box is positioned at the discharge end of the battery sheet conveying mechanism and is used for recycling the unqualified NG battery sheets.

6. The grid-less battery cell string welder of claim 1, wherein the film attachment device comprises a film supply mechanism, a first film attachment mechanism, and a second film attachment mechanism, wherein:

The adhesive film supply mechanism is used for supplying a back adhesive film and a front adhesive film;

The first film pasting mechanism is used for obtaining a back adhesive film from the adhesive film supply mechanism and paving the obtained back adhesive film to the first paving position; the first film pasting mechanism is further used for obtaining the welding strip group supplied by the welding strip supply device, and paving the obtained welding strip group to the first paving position and the second paving position, so that a back adhesive film positioned at the first paving position is pasted on the rear half section of the welding strip group, and the front half section of the welding strip group is overlapped on a battery piece positioned at the second paving position;

The second film pasting mechanism is used for obtaining a front adhesive film from the adhesive film supply mechanism and paving the obtained front adhesive film to the second paving position, so that the front adhesive film is used for pasting the first half section of the welding strip group on the battery piece positioned at the second paving position.

7. The grid-less battery cell string welder of claim 6, wherein the adhesive film supply mechanism comprises a discharge portion, a first adhesive film output portion, and a second adhesive film output portion, wherein:

The discharging part is used for respectively supplying the adhesive films to the first adhesive film output part and the first adhesive film output part;

The first adhesive film output part is used for outputting and cutting an adhesive film to obtain a back adhesive film with a preset length, and the second adhesive film output part is used for outputting and cutting the adhesive film to obtain a front adhesive film with the preset length;

the first film pasting mechanism obtains a back adhesive film from the first adhesive film output part, and the second film pasting mechanism obtains a front adhesive film from the second adhesive film output part.

8. The grid-less battery cell string welding machine of claim 7, wherein the first adhesive film output portion and the second adhesive film output portion have the same structure, the first adhesive film output portion comprises a mounting bracket, a pressing driving portion, a rotation driving portion, a pressing roller, an output roller, a guide plate and a cutting portion, wherein:

The guide plate is horizontally connected to the mounting bracket;

The pressing driving part and the rotating driving part are arranged on the mounting bracket;

the output roller is arranged on the mounting bracket and is close to the end part of the guide plate;

The pressing roller is rotatably connected to the driving end of the pressing driving part and is in transmission connection with the driving end of the rotating driving part, the pressing roller is positioned above the output roller and is parallel to the output roller, and an output gap for a glue film to pass through is formed between the pressing roller and the output roller;

The adhesive film discharged by the discharging part enters the output gap, and the rotary driving part is used for driving the press roller to rotate so as to output the adhesive film to the guide plate;

The cutting part is arranged on the mounting bracket and is close to the output gap, and the cutting part is used for cutting off the adhesive film to obtain the back adhesive film with the preset length when the adhesive film with the preset length is output onto the guide plate.

9. The grid-less battery cell string welder of claim 8, wherein the discharge section discharges a plurality of parallel adhesive films;

A plurality of guide grooves which are in one-to-one correspondence with the adhesive films are arranged on the guide plate, and each guide groove is used for accommodating the corresponding adhesive film;

The cutting part comprises a cutting driving piece and a cutting plate, wherein:

the cutting driving piece is arranged on the mounting bracket;

The cutting plate is connected to the driving end of the cutting driving piece, and a plurality of cutters which are in one-to-one correspondence with the guide grooves are arranged at the bottom of the cutting plate side by side;

When the cutting driving piece drives the cutting plate to descend towards the guide plate, the cutter enters the corresponding guide groove to cut off the adhesive film positioned in the guide groove.

10. The grid-less battery cell string welder of claim 7, wherein the discharge portion comprises a first discharge portion for supplying a film to the first film output portion and a second discharge portion for supplying a film to the second film output portion.

11. The grid-less battery cell string welder of claim 6, wherein the first film attachment mechanism comprises a first translational drive module, a mounting base, a first lift drive module, a second lift drive module, a first adsorption assembly, and a solder strip traction assembly, wherein:

The mounting bottom plate is connected to the driving end of the first translation driving module;

The first lifting driving module and the second lifting driving module are arranged on the mounting bottom plate side by side along the conveying direction of the serial conveying device;

The first adsorption component is connected to the driving end of the first lifting driving module, and the welding strip traction component is connected to the driving end of the second lifting driving module;

The first translation driving module is configured to cooperate with the first lifting driving module to drive the first adsorption assembly to translate and lift along the conveying direction of the serial conveying device so as to drive the first adsorption assembly to suck the back adhesive film from the first adhesive film output part and lay the back adhesive film to the first laying position;

The first translation driving module is further configured to drive the welding strip traction assembly to translate and lift along the conveying direction of the serial conveying device in a matched mode with the second lifting driving module so as to drive the welding strip traction assembly to receive the welding strip group supplied by the welding strip supply device and lay the welding strip group to the first laying position and the second laying position.

12. The backless battery cell string welder of claim 11, wherein the first suction assembly comprises a second translational drive module and a first suction plate, wherein:

The second translation driving module is connected to the driving end of the first lifting driving module, and the first adsorption plate is connected to the driving end of the second translation driving module;

The first adsorption plate is used for adsorbing the back adhesive film, and the second translation driving module is used for driving the first adsorption plate to translate along the conveying direction of the serial conveying device.

13. The grid-less battery cell string welder of claim 6, wherein the second film attachment mechanism comprises a third translational drive module, a third lifting drive module, and a second adsorption plate, wherein:

The second adsorption plate is connected to the driving end of the second lifting driving module;

The third translation driving module is configured to cooperate with the third lifting driving module to drive the second adsorption plate to translate and lift along the conveying direction of the serial conveying device so as to drive the second adsorption plate to suck the front adhesive film from the second adhesive film output part and lay the front adhesive film to the second laying position.