CN220306267U - Battery string manufacturing device - Google Patents

Abstract

The application provides a battery string manufacturing device, which comprises a serial connection conveying mechanism, a glue film laying mechanism, a welding belt laying mechanism and a battery piece laying mechanism. The adhesive film laying mechanism is used for laying the (i+1) th adhesive film on the back surface to the first laying position; the welding strip laying mechanism is used for laying an (i+1) th welding strip group to the first laying position and the second laying position; the battery piece laying mechanism is used for laying an i+1th battery piece to a first laying position so that the second half section of the i+1th welding strip group is adhered to the i+1th battery piece, and the adhesive film laying mechanism is also used for laying an i front adhesive film to a second laying position so that the first half section of the i+1th welding strip group is adhered to the i th battery piece; the serial conveying mechanism is used for stepping backwards to leave a first laying position. According to the battery piece bonding method, the bonding tape is bonded on the battery piece through the adhesive film, the bonding force between the bonding tape and the battery piece is improved, and the bonding tape is prevented from being separated from the battery piece in the carrying process.

Description

Battery string manufacturing device

Technical Field

The application relates to the field of battery production, in particular to a battery string manufacturing device.

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 Invention

In order to solve the technical problem, the application provides a battery string manufacturing device, which adopts the following technical scheme:

the utility model provides a battery string making devices for concatenate the battery piece into the battery string, the battery piece is for there being not main bars battery piece, and battery string making devices includes concatenate conveying mechanism, glued membrane laying mechanism, welding strip laying mechanism and battery piece laying mechanism, wherein:

the serial conveying mechanism 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 adhesive film laying mechanism is configured to lay the (i+1) th back adhesive film to the first laying position;

the welding strip laying mechanism is configured to lay an (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 mechanism is configured to lay an i+1th battery piece to a first laying position, the i+1th back adhesive film bonds the back half section of the i+1th welding band group to the back surface of the i+1th battery piece, and the adhesive film laying mechanism is also configured to lay an i front adhesive film to a second laying position, wherein the i front adhesive film bonds the front half section of the i+1th welding band group to the front surface of the i battery piece;

the tandem conveying mechanism is configured to step back a predetermined distance so that the (i+1) th battery piece and the (i+1) th back adhesive film step from the first laying position to the second laying position to vacate the first laying position;

wherein i is an integer not less than 1.

The battery string manufacturing device provided by the application is characterized in that the back adhesive film and the front adhesive film are inserted in the laying and stacking process of the battery piece without the main grid 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 adhesive strength of the adhesive film is larger than the connecting force of the welding strip and the battery piece without the main grid after welding, so that the welding strip and the battery piece are prevented from being separated in the carrying process after strings are formed. The battery string can be directly typeset and stitch-welded with the bus bar, and during subsequent lamination, the welding connection of the welding strip and the battery piece can be realized only through low-temperature welding, compared with the traditional high-temperature welding string, the step of coating soldering flux on the welding strip is omitted, and the thermal influence of high-temperature welding on the battery piece can be reduced.

In addition, the laying and stacking of the adhesive film, the welding strip group and the battery piece are sequentially completed on the serial conveying mechanism, so that the serial efficiency is ensured.

In some embodiments, the back side adhesive film is a one-piece adhesive film for adhering the second half of all the solder strips in the solder strip group to the back side of the battery cell; or the back adhesive film comprises a plurality of back adhesive tapes which are arranged at intervals along the stepping direction perpendicular to the serial conveying mechanism, the widths of the plurality of back adhesive tapes are the same or different, and each back adhesive tape is used for bonding the back half section of at least one welding tape in the welding tape group to the back of the battery piece; the front adhesive film is a whole adhesive film and is used for bonding the front half sections of all the welding strips in the welding strip group to the front of the battery piece; or the front adhesive film comprises a plurality of front adhesive tapes which are arranged at intervals along the stepping direction perpendicular to the serial conveying mechanism, the widths of the plurality of front adhesive tapes are the same or different, and each front adhesive tape is used for bonding the front half section of at least one welding tape in the welding tape group to the front surface of the battery piece.

And all the welding strips in the welding strip group are bonded by adopting a whole adhesive film, and the adhesive film preparation and laying operation are simpler. And a plurality of adhesive tapes are adopted to bond the welding strip group, so that compared with a whole adhesive film, the adhesive can achieve the same bonding effect, save the using amount of the film strip and reduce the material cost.

In some embodiments, the film placement mechanism comprises a back film placement mechanism and a front film placement mechanism, wherein: the back adhesive film laying mechanism is used for laying a back adhesive film to the first laying position; the front adhesive film laying mechanism is used for laying the front adhesive film to the second laying position.

The back adhesive film laying mechanism and the front adhesive film laying mechanism are adopted to respectively lay back adhesive films and front adhesive films, so that the laying efficiency of the adhesive films is improved, and the manufacturing efficiency of the battery strings is further improved.

In some embodiments, the back side film placement mechanism includes a back side film supply section for preparing a back side film and a back side film handling placement section for picking up the back side film prepared by the back side film supply section and placing the picked back side film to a first placement position; the front adhesive film laying mechanism comprises a front adhesive film supply part and a front adhesive film carrying and laying part, wherein the front adhesive film supply part is used for preparing a front adhesive film, the front adhesive film carrying and laying part is used for picking up the front adhesive film prepared by the front adhesive film supply part, and laying the picked front adhesive film to a second laying position.

The back adhesive film laying mechanism realizes automatic preparation and automatic laying of the back adhesive film through the matching of the back adhesive film supply part and the back adhesive film carrying and laying part; the front adhesive film laying mechanism realizes automatic preparation and automatic laying of the front adhesive film through matching of the front adhesive film supply part and the front adhesive film carrying and laying part.

In some embodiments, a first heating assembly is arranged on the serial conveying mechanism, and the first heating assembly is used for heating the laid back adhesive film so that the back adhesive film is glued to the battery piece after the viscosity of the back adhesive film is released; and/or the adhesive film laying mechanism is provided with a second heating component, and the second heating component is used for heating the back adhesive film and/or the front adhesive film in the laying process so that the back adhesive film and/or the front adhesive film are adhered to the battery piece after the viscosity of the back adhesive film and/or the front adhesive film is released.

The adhesive film on the back surface can be heated by arranging a first heating assembly on the serial conveying mechanism and/or arranging a second heating assembly on the adhesive film laying mechanism, so that the adhesive film on the back surface can be released, and after the welding belt group and the battery piece are laid on the adhesive film on the back surface, the welding belt group can be bonded on the battery piece by the adhesive film on the back surface; the adhesive film can be heated by the second heating assembly on the adhesive film laying mechanism, so that the adhesive film can be heated in the front adhesive film laying process, the adhesive film can be released, the corresponding welding belt group can be bonded on the battery piece after the front adhesive film is laid, laying, namely bonding is realized, and dislocation of the welding belt in the conveying process is avoided.

In some embodiments, the battery string production apparatus further comprises a tooling placement mechanism configured to place an ith compaction tooling to the second placement position, the ith compaction tooling compacting the ith front side adhesive film on the front side of the ith battery piece.

Through setting up frock and laying the mechanism, compress tightly frock can assist positive glued membrane and back glued membrane with welding the firm location of band group on the battery piece.

In some embodiments, the serial conveying mechanism is further provided with a pressing position, and the battery string manufacturing device further comprises a pressing mechanism which is arranged above the pressing position and can be lifted; the pressing mechanism is used for pressing down 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 adhesion strength between the back adhesive film and the front adhesive film and the battery piece is enhanced.

Through setting up pressing mechanism, realized the pressing to the battery piece that has adhesive film on the back and positive glued membrane to strengthen the bonding dynamics between back glued membrane and positive glued membrane and the battery piece.

In some embodiments, a third heating component is disposed on the pressing mechanism, and the third heating component is used for heating at least the front adhesive film adhered to the battery piece when the pressing mechanism presses the battery piece conveyed to the pressing position downwards.

The third heating component is arranged on the pressing mechanism, and the third heating component can at least heat the front adhesive film when the pressing mechanism presses the battery piece conveyed to the pressing position, so that the front adhesive film can be better adhered to the welding belt group and the battery piece.

In some embodiments, the battery string making device further comprises a string separating mechanism and a string discharging conveying mechanism, wherein: the string discharging and conveying mechanism is positioned at the back of the serial conveying mechanism, and the string separating mechanism is positioned between the input end of the string discharging and conveying mechanism and the output end of the serial conveying mechanism; the string separating mechanism is used for dividing the whole battery string adhered with the back adhesive film and the front adhesive film into a plurality of independent segmented battery strings, and the string outputting and conveying mechanism is used for outputting the segmented battery strings.

Automatic string separation of the battery strings glued into strings is achieved.

In some embodiments, the battery sheet placement mechanism includes a battery sheet transport portion and a battery sheet handling placement portion, wherein: the battery piece conveying part is used for conveying the battery pieces towards the serial conveying mechanism, the battery piece conveying and laying part is used for picking up the battery pieces from the battery piece conveying part, and the picked battery pieces are laid to the first laying position.

Through the cooperation of battery piece conveying portion and battery piece transport portion of laying, battery piece laying mechanism has realized carrying and laying the automation of battery piece to further promoted battery piece and laid efficiency.

Drawings

Fig. 1 is a schematic structural diagram of a battery string manufacturing device according to an embodiment of the present application:

FIG. 2 is a schematic structural view of a part of components such as a serial conveying mechanism and a film laying mechanism in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a part of components such as a battery piece laying mechanism and a serial conveying mechanism in an embodiment of the present application;

fig. 4 is a schematic diagram illustrating a process of laying a battery plate, a solder tape set, a back adhesive film and a front adhesive film in an embodiment of the present application;

FIG. 5 is a schematic illustration of the bonding of several adhesive films to a welded tape set in an embodiment of the present application;

fig. 1 to 5 include:

a serial conveying mechanism 1;

adhesive film laying mechanism 2: a back film laying mechanism 21, a front film laying mechanism 22, a back film supply portion 211, a back film carrying and laying portion 212, a front film supply portion 221, and a front film carrying and laying portion 222;

welding strip laying mechanism 3: a solder ribbon supply portion 31, a solder ribbon clamping portion 32, a solder ribbon cutting portion 33, and a solder ribbon pulling portion 34;

cell placement mechanism 4: a battery piece transporting section 41 and a battery piece carrying and laying section 42;

a pressing mechanism 5;

a separation mechanism 6;

a string-out conveying mechanism 7;

a first laying position A and a second laying position B;

back adhesive film 10, solder tape set 20, battery sheet 30, front adhesive film 40, first back adhesive tape 101, second back adhesive tape 102, third back adhesive tape 103, fourth back adhesive tape 104, fifth back adhesive tape 105, and sixth back adhesive tape 106.

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 utility model briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

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 battery string manufacturing device and a manufacturing method, and hereinafter, the battery string manufacturing device and the battery string manufacturing method provided by the present application will be described in an exemplary manner.

The battery string manufacturing device provided by the embodiment of the application is used for connecting battery sheets without a main grid (hereinafter referred to as battery sheets) in series into a battery string. As shown in fig. 1 to 3, the battery string manufacturing device in the embodiment of the application includes a serial conveying mechanism 1, a glue film laying mechanism 2, a welding strip laying mechanism 3 and a battery piece laying mechanism 4, wherein:

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

The film deposition mechanism 2 is configured to deposit the i+1th back film to the vacated first deposition position a.

The tape placement mechanism 3 is configured to place the i+1th tape group onto the first placement position a and the second placement position B, wherein the second half of the i+1th tape group is placed on the i+1th back side adhesive film, and the first half of the i+1th tape group is placed on the i-th battery cell located at the second placement position B.

The battery piece laying mechanism 4 is configured to lay an i+1th battery piece to the first laying position A, the i+1th back adhesive film bonds the back half section of the i+1th welding band group to the back surface of the i+1th battery piece, the adhesive film laying mechanism 2 is further configured to lay an i front adhesive film to the second laying position B, and the i front adhesive film bonds the front half section of the i+1th welding band group to the front surface of the i th battery piece.

The tandem conveyor mechanism 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 laying position a to the second laying position B to free the first laying position a, wherein i is an integer not less than 1. The stepping direction of the tandem conveyor 1 is shown by the arrows in fig. 1 and 2.

In order to enable those skilled in the art to more clearly understand the working process of the battery string manufacturing device in the embodiment of the present application, the following will describe the laying process of the battery sheet 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. 4:

as shown in fig. 4 (a), in the initial state, the first laying position a and the second laying position B of the tandem conveyor 1 are both in the free state.

As shown in (b) of fig. 4, the film deposition mechanism 2 deposits the 1 st back side film 10 toward the first deposition position a.

As shown in fig. 4 (c), the tape laying mechanism 3 lays the 1 st tape group 20 toward the first laying position a and the second laying position B, wherein: 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. 4 (d), the battery piece placement mechanism 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 strip group 20 to the back of the 1 st battery piece 30.

As shown in (e) of fig. 4, 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 deposition mechanism 2 deposits the 2 nd rear adhesive film 10 to the first deposition position a.

As shown in fig. 4 (f), the tape laying mechanism 3 lays the 2 nd tape group 20 toward the first laying position a and the second laying 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. 4 (g), the battery piece placement mechanism 4 places the 2 nd battery piece 30 toward the first placement position a, and the 2 nd back adhesive film 10 adheres the second half of the 2 nd solder ribbon group 20 to the back of the 2 nd battery piece 30. The adhesive film laying mechanism 2 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. 4, the tandem conveyor mechanism steps a predetermined distance backward so that the 2 nd battery sheet 30 and the 2 nd 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 deposition mechanism 2 deposits the 3 rd back side film 10 to the first deposition position a.

As shown in (i) of fig. 4, the tape laying mechanism 3 lays the 3 rd tape group 20 toward the first laying position a and the second laying 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. 4, the battery piece placement mechanism 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 adhesive film laying mechanism 2 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. 4, the tandem conveyor mechanism 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 deposition mechanism 2 deposits the 4 th back side film 10 to the first deposition position a.

As shown in fig. 4 (l), the tape laying mechanism 3 lays the 4 th tape group 20 toward the first laying position a and the second laying position B, wherein: 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 battery string manufacturing device, the back adhesive film and the front adhesive film are inserted in the laying and stacking process of the battery pieces and the welding strips, so that the corresponding welding strip sections can be adhered to the 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 battery pieces without the main grid after welding, so that the welding strips and the battery pieces are prevented from being separated in the carrying process after strings are formed. Therefore, the battery strings can be directly typeset and stitch-welded with the bus bars, and the welding connection between the welding strips and the battery pieces can be realized only by low-temperature welding during subsequent lamination. In addition, compared with the traditional high-temperature welding strings, the embodiment of the application omits the step of coating the soldering flux on the soldering strips, and can reduce the thermal influence of the high-temperature welding on the battery pieces.

In addition, the laying and stacking of the adhesive film, the welding strip group and the battery piece are sequentially completed on the serial conveying mechanism, so that the serial efficiency is ensured.

It should be noted that, in the embodiments of the present application, the "back" of the battery sheet refers to the surface of the battery sheet facing downward, and the "front" of the battery sheet refers to the surface of the battery sheet facing upward.

The back adhesive film in the embodiment of the application can be a whole adhesive film, and the whole adhesive film bonds the second half sections of all the welding strips in the welding strip group to the back of the battery piece. As shown in fig. 5 (a), the solder ribbon set 20 includes 22 total solder ribbons. As shown in fig. 5 (b), the back adhesive film 10 is a one-piece adhesive film that adheres the second half of all 22 of the solder strips in the solder strip group to the back surface of the battery cell.

Of course, the back adhesive film may also include a plurality of back adhesive tapes arranged at intervals along a stepping direction perpendicular to the serial conveying mechanism, where the widths of the plurality of back adhesive tapes are the same or different, and each back adhesive tape is used to adhere the second half section of at least one of the solder strips to the back of the battery piece.

For example, as shown in fig. 5 (c), the back adhesive film 10 includes 4 back adhesive tapes, wherein the first back adhesive tape 101 has a first narrower width, and the second back adhesive tape 102, the third back adhesive tape 103, and the fourth back adhesive tape 104 have the same second wider width. The first back adhesive tape 101 adheres the second half of the 4 solder tapes to the back of the battery sheet, and the second back adhesive tape 102, the third back adhesive tape 103 and the fourth back adhesive tape 104 adhere the second half of the 6 solder tapes to the back of the battery sheet, respectively.

As another example, as shown in (d) of fig. 5, the back adhesive film 10 includes 11 fifth back adhesive tapes 105 having the same width, and each fifth back adhesive tape 105 adheres the second half of 2 solder tapes to the back surface of the battery sheet, respectively.

As further shown in fig. 5 (e), the back adhesive film includes 22 sixth back adhesive strips 106 having the same width, and each sixth back adhesive strip 106 adheres the rear half of 1 solder strip to the back of the battery cell.

Likewise, the front adhesive film in the embodiment of the application may be a whole adhesive film, where the whole adhesive film adheres the first half sections of all the solder strips in the solder strip group to the front of the battery piece. The front adhesive film can also comprise a plurality of front adhesive tapes which are arranged at intervals along the stepping direction perpendicular to the serial conveying mechanism, the widths of the plurality of front adhesive tapes are the same or different, and each front adhesive tape is used for bonding the front half section of at least one welding tape in the welding tape group to the front face of the battery piece.

And all the welding strips in the welding strip group are bonded by adopting a whole adhesive film, and the adhesive film preparation and laying operation are simpler. And a plurality of adhesive tapes are adopted to bond the welding strip group, so that compared with a whole adhesive film, the adhesive can achieve the same bonding effect, save the use amount of the film strip and reduce the material cost.

As shown in fig. 2, the film deposition mechanism 2 includes a back film deposition mechanism 21 and a front film deposition mechanism 22, in which: the back adhesive film laying mechanism 21 is used for laying back adhesive films to the first laying position A. The front adhesive film laying mechanism 22 is used for laying the front adhesive film to the second laying position B.

The back adhesive film laying mechanism 21 and the front adhesive film laying mechanism 22 are adopted to respectively lay back adhesive films and front adhesive films, so that the laying efficiency of the adhesive films is improved, and the manufacturing efficiency of the battery strings is further improved.

With continued reference to fig. 2, the adhesive film back laying mechanism 21 includes an adhesive film back supply section 211 and an adhesive film back carrying laying section 212, in which: the back adhesive film supply section 211 is used for preparing a back adhesive film, and the back adhesive film carrying and laying section 212 is used for picking up the back adhesive film prepared by the back adhesive film supply section 211 and laying the picked back adhesive film to the first laying position A. Optionally, a suction cup is disposed on the back adhesive film carrying and laying portion 212, and the back adhesive film is sucked by the suction cup to perform a picking operation on the back adhesive film. The back adhesive film laying mechanism 21 realizes automatic preparation and automatic laying of the back adhesive film by the cooperation of the back adhesive film supply part 211 and the back adhesive film carrying and laying part 212.

Also, the front adhesive film laying mechanism 22 includes a front adhesive film supply part 221 and a front adhesive film carrying and laying part 222, wherein the front adhesive film supply part 221 is used for preparing a front adhesive film, the front adhesive film carrying and laying part 222 is used for picking up the front adhesive film prepared by the front adhesive film supply part 221, and laying the picked-up front adhesive film to a second laying position B. Optionally, the front adhesive film carrying and laying part 222 is provided with a suction cup, and the front adhesive film is sucked by the suction cup to implement the picking operation of the front adhesive film. The front adhesive film laying mechanism 22 realizes automatic preparation and automatic laying of the front adhesive film by the cooperation of the front adhesive film supply part 221 and the front adhesive film carrying and laying part 222.

The back adhesive film and the front adhesive film adopted in the embodiment of the application can be self-adhesive films or hot melt adhesive films which can release viscosity after being heated.

In the case that the back adhesive film is a hot melt adhesive film and the front adhesive film is a self-adhesive film, in order to enable the back adhesive film to release viscosity, a first heating assembly is optionally arranged on the serial conveying mechanism 1 and used for heating the laid back adhesive film, so that the back adhesive film is adhered to the battery piece after releasing viscosity. The first heating element may be, for example, a heating plate arranged below the conveyor belt of the tandem conveyor 1. In order to accelerate the adhesive release of the back adhesive film, optionally, a second heating assembly is arranged on the adhesive film laying mechanism 2, and the second heating assembly is used for heating the back adhesive film in the laying process. The second heating unit may be, for example, a heating rod or a silica gel heating pad disposed on the back side adhesive film carrying and laying portion 212 to perform heating of the back side adhesive film during the back side adhesive film carrying and laying process.

In the case that the back adhesive film is self-adhesive film and the front adhesive film is hot melt adhesive film, in order to enable the front adhesive film to release viscosity, optionally, a second heating assembly is arranged on the adhesive film laying mechanism 2 and used for heating the front adhesive film in the laying process, so that the front adhesive film is adhered to the battery piece after releasing viscosity. The second heating component may be, for example, a heating rod or a silica gel heating pad disposed on the front adhesive film carrying and laying portion 222, so as to heat the front adhesive film during the front adhesive film carrying and laying process.

In the case that the back adhesive film and the front adhesive film are both hot melt adhesive films, in order to enable the back adhesive film and the front adhesive film to release viscosity, the serial conveying mechanism 1 is optionally provided with a first heating assembly, and the adhesive film laying mechanism 2 is provided with a second heating assembly. The first heating assembly is used for heating the laid back adhesive film so that the back adhesive film is glued to the battery piece after the viscosity of the back adhesive film is released. The second heating component is used for heating the front adhesive film in the laying process so that the front adhesive film is glued to the battery piece after releasing the viscosity, and of course, the second heating component can also be used for heating the back adhesive film in the laying process so as to accelerate the viscosity release of the back adhesive film.

And under the condition that the adopted back adhesive film and the adopted front adhesive film are self-adhesive films, the first heating assembly and the second heating assembly are not required to be arranged, and the back adhesive film and the front adhesive film are paved through the self-adhesive property, namely the welding belt group and the battery piece are bonded.

In the conventional string forming process of paving the battery piece and the welding strip group, after the paving of the welding strip group on the upper surface of the battery piece is completed, the welding strip group is pressed on the battery piece by adopting a pressing tool, so that dislocation of the welding strip group is avoided. In this application, back glued membrane and positive glued membrane can realize laying and bond promptly, can guarantee to weld the band group and can be by more firm bonding on the battery piece, and then guarantee to weld the band group and can not deviate from the battery piece in the transportation process of concatenating conveying mechanism 1 to the in-process of becoming string of this application can not use and compress tightly the frock, with improvement string speed, saving equipment manufacturing cost.

Optionally, for the situation that the bonding strength that back glued membrane and positive glued membrane lead to providing because of factors such as self characteristic is less, battery cluster manufacturing device in this application embodiment also can include frock laying mechanism, and frock laying mechanism is configured to lay the ith and compresses tightly the frock to the second position of laying, and the ith compresses tightly the frock and compresses tightly the positive glued membrane of ith at the front of ith battery piece. Optionally, after the adhesive film laying mechanism lays the ith front adhesive film to the second laying position, the tooling laying mechanism lays the ith compaction tooling to the second laying position, so that the ith compaction tooling compacts the ith front adhesive film on the front face of the ith battery piece. Optionally, the tooling placement mechanism shares a set of driving mechanism with the battery piece placement mechanism 4 and/or the front adhesive film carrying placement portion 222, and the driving mechanism is, for example, a manipulator, a robot or an XYZ moving module, so as to drive the tooling placement mechanism to move synchronously with the battery piece placement mechanism 4 and/or the front adhesive film carrying placement portion 222. Of course, in order to realize flexible control, the tooling laying mechanism, the battery piece laying mechanism 4 and the front adhesive film carrying and laying part 222 can be also independently provided with driving mechanisms.

The pressing tool is pressed and placed on the front adhesive film through the tool placement mechanism, the pressing tool can assist the front adhesive film and the back adhesive film to firmly position the welding strip group on the battery piece, and dislocation of the welding strip group in the conveying process is avoided.

As shown in fig. 1 and 2, optionally, the tandem conveyor 1 is further provided with a stitching position C located downstream of the second laying position B. Correspondingly, the battery string manufacturing device in the embodiment of the application further comprises a pressing mechanism 5 which is arranged above the pressing position C and can be lifted. The pressing mechanism 5 is used for pressing down the battery piece which is conveyed to the pressing position C and is adhered with the back adhesive film and the front adhesive film, so that the adhesion strength between the back adhesive film and the front adhesive film and the battery piece is enhanced.

Optionally, the third heating component is disposed on the pressing mechanism 5, and the third heating component is configured to heat at least the front adhesive film adhered to the battery piece when the pressing mechanism 5 presses the battery piece conveyed to the pressing position downward, so that the front adhesive film is better adhered to the battery piece. The third heating component can adopt modes of hot air heating, heating rod heating or infrared lamp tube heating and the like.

Optionally, the battery string making device in the embodiment of the present application further includes a string separating mechanism 6 and a string discharging conveying mechanism 7, where: the string discharging and conveying mechanism 7 is positioned at the back of the serial conveying mechanism 2, and the string separating mechanism 6 is positioned between the input end of the string discharging and conveying mechanism 7 and the output end of the serial conveying mechanism 1; the string separating mechanism 6 is used for separating the whole battery string adhered with the back adhesive film and the front adhesive film into a plurality of independent segmented battery strings, and the string outputting and conveying mechanism 7 is used for outputting the segmented battery strings.

By providing the string separating mechanism 6 and the string discharging conveying mechanism 7, automatic string separation of the battery strings glued into strings is achieved, thereby obtaining a battery string including a predetermined number of battery pieces.

As shown in fig. 3, alternatively, the battery piece placement mechanism 4 includes a battery piece transporting portion 41 and a battery piece handling placement portion 42, in which: the battery piece conveying part 41 is used for conveying the battery pieces towards the serial conveying mechanism 1, and the battery piece carrying and laying part 42 is used for picking up the battery pieces from the battery piece conveying part and laying the picked battery pieces to the first laying position A.

With continued reference to fig. 1, optionally, the tape laying mechanism 3 in this embodiment of the present application includes a tape supply portion 31, a tape clamping portion 32, a tape cutting portion 33, and a tape traction portion 34 that are disposed on a front path of the tandem conveyor mechanism 1 and sequentially disposed along a stepping direction of the tandem conveyor mechanism 1, where:

the ribbon supply portion 31 is for supplying a plurality of ribbons extending in the stepping direction of the tandem conveyor 1.

The ribbon pulling section 34 is for gripping the plurality of ribbons supplied from the ribbon supply section 31 and pulling the gripped plurality of ribbons toward the tandem conveyor 1 so that the plurality of ribbons sequentially pass through the ribbon clamping section 32 and the ribbon cutting section 33.

When the distance between the ribbon pulling portion 34 and the ribbon cutting portion 33 reaches a predetermined value, the ribbon clamping portion 32 is configured to clamp the plurality of ribbons, the ribbon cutting portion 33 is configured to cut the plurality of ribbons to obtain a ribbon group having a predetermined length, and the ribbon pulling portion 33 is further configured to deposit the ribbon group to the first deposition position a and the second deposition position B.

The embodiment of the application also provides a battery string manufacturing method for connecting battery pieces in series to form a battery string, wherein the battery pieces are battery pieces without main grids, and the battery string manufacturing method comprises the following steps:

and laying an i+1th back adhesive film.

And paving an (i+1) th welding strip group on the (i+1) th back adhesive film, 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.

And paving the (i+1) th battery piece on the second half section of the (i+1) th welding strip group, and paving the (i) th front adhesive film on the first half section of the (i+1) th welding strip group, so that the (i+1) th back adhesive film bonds the second half section of the (i+1) th welding strip group to the back surface of the (i+1) th battery piece, and the (i) th front adhesive film bonds the first half section of the (i+1) th welding strip group to the front surface of the (i) th battery piece.

And (3) cycling the steps to obtain the battery string, wherein i is an integer more than or equal to 1.

According to the battery string manufacturing method, in the string forming process of the battery sheets without the main grid, the welding strip group is adhered and fixed to the battery sheets through the adhesive film, so that the welding strip is prevented from being deviated. Therefore, during subsequent lamination, the welding connection between the welding strip and the battery piece can be realized only through low-temperature welding, the step of coating soldering flux on the welding strip is omitted during low-temperature welding, and the thermal influence of high-temperature welding on the battery piece can be reduced.

The back adhesive film in the embodiment of the application can be a whole adhesive film, and the whole adhesive film bonds the second half sections of all the welding strips in the welding strip group to the back of the battery piece. As shown in fig. 5 (a), the solder ribbon set 20 includes 22 total solder ribbons. As shown in fig. 5 (b), the back adhesive film 10 is a one-piece adhesive film that adheres the second half of all 22 of the solder strips in the solder strip group to the back surface of the battery cell.

Of course, the back adhesive film may also include a plurality of back adhesive tapes arranged at intervals, where the widths of the plurality of back adhesive tapes are the same or different, and each back adhesive tape is used to adhere the second half of at least one of the solder strips in the solder strip group to the back of the battery piece.

For example, as shown in fig. 5 (c), the back adhesive film 10 includes 4 back adhesive tapes, wherein the first back adhesive tape 101 has a first narrower width, and the second back adhesive tape 102, the third back adhesive tape 103, and the fourth back adhesive tape 104 have the same second wider width. The first back adhesive tape 101 adheres the second half of the 4 solder tapes to the back of the battery sheet, and the second back adhesive tape 102, the third back adhesive tape 103 and the fourth back adhesive tape 104 adhere the second half of the 6 solder tapes to the back of the battery sheet, respectively.

As another example, as shown in (d) of fig. 5, the back adhesive film 10 includes 11 fifth back adhesive tapes 105 having the same width, and each fifth back adhesive tape 105 adheres the second half of 2 solder tapes to the back surface of the battery sheet, respectively.

As further shown in fig. 5 (e), the back adhesive film includes 22 sixth back adhesive strips 106 having the same width, and each sixth back adhesive strip 106 adheres the rear half of 1 solder strip to the back of the battery cell.

Likewise, the front adhesive film in the embodiment of the application may be a whole adhesive film, where the whole adhesive film adheres the first half sections of all the solder strips in the solder strip group to the front of the battery piece. The front adhesive film can also comprise a plurality of front adhesive tapes which are arranged at intervals, the widths of the plurality of front adhesive tapes are the same or different, and each front adhesive tape is used for bonding the front half section of at least one welding strip in the welding strip group to the front face of the battery piece.

And all the welding strips in the welding strip group are bonded by adopting a whole adhesive film, and the adhesive film preparation and laying operation are simpler. And a plurality of adhesive tapes are adopted to bond the welding strip group, so that compared with a whole adhesive film, the adhesive can achieve the same bonding effect, save the using amount of the film strip and reduce the material cost.

Under the condition that the back adhesive film and the front adhesive film are all integral adhesive films, the battery string manufacturing method in the embodiment of the application further comprises the following steps: and (3) dragging and laying the film strip in the film strip coil on a film cutting platform, and cutting the film strip along the direction perpendicular to the traction direction of the film strip by a cutter to obtain a whole piece of adhesive film. And taking away the whole adhesive film, and repeating the operation.

Under the condition that the back adhesive film and the front adhesive film respectively comprise a plurality of back adhesive tapes and front adhesive tapes which are arranged at intervals, the battery string manufacturing method in the embodiment of the application further comprises the following steps: the film strip in the film strip coil is drawn and laid on a film cutting platform, the film strip is cut by a plurality of cutters along the drawing direction perpendicular to the film strip, a plurality of adhesive tapes are obtained, the adhesive tapes are taken away, and the adhesive tapes are separated before or during the taking away process. Repeating the above operation, wherein the adhesive tape is a back adhesive tape or a front adhesive tape.

The back adhesive film and the front adhesive film adopted by the embodiment of the application can be self-adhesive films or hot-melt adhesive films which can release viscosity after being heated.

In the case that the back adhesive film is a hot melt adhesive film, in the laying process of laying the (i+1) th back adhesive film and/or after finishing the laying, the manufacturing method of the battery string in the embodiment of the application further includes: the back adhesive film is heated to release the tackiness of the back adhesive film. Therefore, the bonding can be realized, and the dislocation of the welding strip in the conveying process is avoided.

Under the condition that the front adhesive film is a hot melt adhesive film, in the laying process of laying the ith front adhesive film on the first half section of the (i+1) th welding strip group, the manufacturing method of the battery string in the embodiment of the application further comprises the following steps: heating the front adhesive film to release the adhesive property of the front adhesive film. Therefore, the bonding can be realized, and the dislocation of the welding strip in the conveying process is avoided.

Optionally, the method for manufacturing the battery string according to the embodiment of the application further includes: and pressing down the battery piece after the front adhesive film is laid so as to strengthen the adhesive strength between the back adhesive film and the battery piece and between the front adhesive film and the battery piece.

Optionally, in the process of pressing down the battery piece after the front adhesive film is laid, heating the back adhesive film and/or the front adhesive film is performed, so that the back adhesive film and/or the front adhesive film further releases viscosity, and finally, the bonding strength is improved.

The method for manufacturing a battery string in the embodiment of the present application may be implemented by the battery string manufacturing device in the foregoing embodiment, and further manufacturing details may refer to the description related to the foregoing embodiment of the battery string manufacturing device, which is not repeated herein for brevity of description.

The foregoing has outlined the detailed description of the utility model in sufficient detail. 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 disclosure should be so as to fall within the scope of the disclosure. The scope of the application is defined by the claims rather than by the description of the embodiments set forth above.

Claims (10)

1. The battery string manufacturing device is characterized by being used for connecting battery pieces in series to form a battery string, wherein the battery pieces are battery pieces without main grids, and the battery string manufacturing device comprises a series conveying mechanism, a glue film laying mechanism, a welding belt laying mechanism and a battery piece laying mechanism, wherein:

the serial conveying mechanism 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 film placement mechanism is configured to place the (i+1) th back side film to the first placement position which is left free;

the weld tape placement mechanism is configured to place an i+1th weld tape group to the first placement location and the second placement location, wherein a second half of the i+1th weld tape group is placed on the i+1th back side adhesive film, and a first half of the i+1th weld tape group is placed on the i-th battery piece located at the second placement location;

the battery piece laying mechanism is configured to lay an i+1th battery piece to the first laying position, the i+1th back adhesive film bonds the rear half section of the i+1th welding band group to the back surface of the i+1th battery piece, and the adhesive film laying mechanism is further configured to lay an i front adhesive film to the second laying position, wherein the i front adhesive film bonds the front half section of the i+1th welding band group to the front surface of the i battery piece;

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

wherein i is an integer not less than 1.

2. The battery string making apparatus of claim 1, wherein the back adhesive film is a whole adhesive film for adhering the rear half sections of all the solder strips in the solder strip group to the back of the battery sheet; or the back adhesive film comprises a plurality of back adhesive tapes which are arranged at intervals along the stepping direction perpendicular to the serial conveying mechanism, the widths of the plurality of back adhesive tapes are the same or different, and each back adhesive tape is used for bonding the back half section of at least one welding tape in the welding tape group to the back of the battery piece;

the front adhesive film is a whole adhesive film and is used for bonding the first half sections of all the welding strips in the welding strip group to the front of the battery piece; or the front adhesive film comprises a plurality of front adhesive tapes which are arranged at intervals along the stepping direction perpendicular to the serial conveying mechanism, the widths of the plurality of front adhesive tapes are the same or different, and each front adhesive tape is used for bonding the front half section of at least one welding tape in the welding tape group to the front of the battery piece.

3. The battery string production apparatus of claim 1, wherein the film placement mechanism comprises a back film placement mechanism and a front film placement mechanism, wherein:

the back adhesive film laying mechanism is used for laying a back adhesive film to the first laying position;

the front adhesive film laying mechanism is used for laying a front adhesive film to the second laying position.

4. The battery string making apparatus according to claim 3, wherein:

the back adhesive film laying mechanism comprises a back adhesive film supply part and a back adhesive film conveying and laying part, wherein the back adhesive film supply part is used for preparing a back adhesive film, and the back adhesive film conveying and laying part is used for picking up the back adhesive film prepared by the back adhesive film supply part and laying the picked back adhesive film to the first laying position;

the front adhesive film laying mechanism comprises a front adhesive film supply part and a front adhesive film conveying and laying part, wherein the front adhesive film supply part is used for preparing a front adhesive film, the front adhesive film conveying and laying part is used for picking up the front adhesive film prepared by the front adhesive film supply part and laying the picked front adhesive film to the second laying position.

5. The battery string making device according to claim 1, wherein a first heating assembly is arranged on the serial conveying mechanism and is used for heating the laid back adhesive film so that the back adhesive film is adhered to the battery sheet after releasing the viscosity; and/or

The adhesive film laying mechanism is provided with a second heating assembly, and the second heating assembly is used for heating the back adhesive film and/or the front adhesive film in the laying process so that the back adhesive film and/or the front adhesive film are adhered to the battery piece after the adhesive is released.

6. The battery string production apparatus of claim 1, further comprising a tooling placement mechanism configured to place an ith compaction tooling to the second placement location, the ith compaction tooling compacting an ith positive side adhesive film on the front side of an ith battery sheet.

7. The battery string making device according to claim 1, wherein the serial conveying mechanism is further provided with a pressing position, and the battery string making device further comprises a pressing mechanism which is arranged above the pressing position and can be lifted;

the pressing mechanism is used for pressing down 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 adhesion strength between the back adhesive film and the front adhesive film and the battery piece is enhanced.

8. The battery string making apparatus of claim 7, wherein a third heating assembly is provided on the pressing mechanism, and the third heating assembly is configured to heat at least the front adhesive film adhered to the battery sheet when the pressing mechanism presses down the battery sheet conveyed to the pressing position.

9. The battery string production apparatus according to claim 1, further comprising a string separating mechanism and a string discharging conveying mechanism, wherein:

the string discharging and conveying mechanism is positioned at the back of the serial conveying mechanism, and the string separating mechanism is positioned between the input end of the string discharging and conveying mechanism and the output end of the serial conveying mechanism;

the string separating mechanism is used for dividing the whole battery string adhered with the back adhesive film and the front adhesive film into a plurality of independent segmented battery strings, and the string outputting and conveying mechanism is used for outputting the segmented battery strings.

10. The battery string production apparatus according to claim 1, wherein the battery piece laying mechanism includes a battery piece conveying portion and a battery piece carrying and laying portion, wherein:

the battery piece conveying part is used for conveying the battery pieces towards the serial conveying mechanism, and the battery piece carrying and laying part is used for picking up the battery pieces from the battery piece conveying part and laying the picked battery pieces to the first laying position.