CN115763329A - A battery string production equipment and production method - Google Patents

Abstract

The application discloses battery cluster production facility, including back membrane strip feed portion, battery piece feed portion, weld and take feed portion, surface membrane strip feed assembly and conveying part, wherein: the back film strip feeding part is used for placing a plurality of parallel back film strips on the conveying surface of the conveying part, and the conveying surface of the conveying part drives the back film strips to synchronously advance; the welding strip feeding part is used for providing a welding strip group to the conveying part, and welding strips in the welding strip group and the back film strips are placed in a one-to-one correspondence mode; the battery piece feeding part is used for supplying battery pieces to the conveying part; the surface film strip feeding assembly is used for supplying the surface film strips to the battery piece so as to fix the welding strip group on the front surface of the battery piece. The welding strip on the back of the battery piece is fixed on the battery piece by the aid of the back film strip feeding portion, the conveying portion drives the back film strip to synchronously advance, continuous feeding of the back film strip is achieved, the front welding strip of the battery piece is fixed on the battery piece by the aid of the surface film strip feeding assembly, and accordingly production of battery strings is completed.

Description

A battery string production equipment and production method

technical field

The invention belongs to the technical field of photovoltaic equipment, and relates to battery string production equipment and a battery string production method.

Background technique

As an important clean energy, photovoltaic is an important energy field and technology direction in the world; among them, photovoltaic cell modules are the core components of photovoltaic power generation, and crystalline silicon cell modules account for more than 95% of the market share. Among them, the cost of crystalline silicon wafers and silver paste occupies a large proportion in crystalline silicon modules. Reducing the amount of silver paste and silicon wafers is very important to reduce the overall cost of modules, the cost of battery power, and improve the market application of photovoltaics.

At present, the thickness of the mainstream silicon wafers for photovoltaic cells on the market is about 170-180um. During the battery processing process, the crystalline silicon wafers need to print silver (or silver-copper) paste on the surface of the battery. After drying or sintering, pass through the metal paste The material exports the photo-generated current inside the battery. In the mainstream photovoltaic modules, the products between the cells are interconnected by metal ribbons. The surface of the solder ribbons has a tin-lead alloy. The ribbons and the cells are welded together by high temperature using a special infrared welding device. The typical welding temperature is 220~ Between 350°C, the tin-lead alloy melts at high temperature to fuse the solder ribbon and the silver paste on the surface of the battery together. Due to the high-temperature process used in the traditional battery module interconnection scheme, the stress warping of the silicon wafer is prone to cracks and fragments, making it difficult to achieve thinning; at the same time, in order to achieve effective welding, it is necessary to use a large amount of silver under the solder strip as the busbar electrode. A large number of silver bus bars bring high silver paste and battery costs.

There is also smart wire technology in the existing technology. In this technology, there is no busbar on the surface of the battery. The battery sheets are interconnected by low-temperature soldering ribbons, but there is no infrared welding process. Fix the welding ribbon on the adhesive film; part of the welding ribbon is embedded in the adhesive film, and a part is exposed to the outside, and the exposed part is in contact with the battery. During the lamination process, the part of the welding ribbon exposed to the adhesive film is fused with the battery to realize interconnection. In this solution, an expensive special adhesive film is required to fix the welding strip, which also has the problem of high cost.

Contents of the invention

In order to solve the problems in the related technology, this application provides a kind of battery string production equipment, pre-lay the back membrane strip, then stack the welding ribbon and the battery sheet on the back membrane strip, use the fixing film to fix the welding ribbon on the battery sheet, The production of battery strings is realized by heating the back film strips and fixing film at low temperature. At the same time, a battery string production method is provided, which can realize low-temperature welding production of the battery string.

The present application provides a battery string production equipment, the battery string production equipment includes a rear film strip supply part, a cell supply part, a welding ribbon supply part, a surface film strip supply assembly and a conveying part, wherein: the back The mask strip supply part is used to place multiple parallel back film strips on the conveying surface of the conveying part, and the conveying surface of the conveying part drives the back film strips to advance synchronously; , the ribbons and the back film strips in the ribbon group are placed in one-to-one correspondence; the cell sheet supply part is used to provide cells to the conveying part; the surface film strip supply assembly is used to provide the cell sheets with surface film strips, and The material supply part and the cell supply part stack the cells and ribbon groups to form a battery string, so that the i-th cell is laid on the second half of the i-th ribbon group, and the i+1th ribbon The first half of the group is laid on the i-th cell, the surface film strip fixes the first half of the i+1th ribbon group on the i-th cell, and the back film strip fixes the second half of the i-th ribbon group On the i cell, where i is any natural number greater than 0.

The welding ribbon on the back of the cell is fixed on the cell through the setting of the back film strip feeding part, and the back film strip is driven synchronously by the conveying part to realize the continuous feeding of the back film strip, and the surface film strip supply assembly The welding ribbon on the front of the battery sheet is fixed on the battery sheet, and the fixing of the battery sheet and the welding ribbon is realized through the setting of the back film supply part and the surface film supply assembly, and the production of the battery string is completed.

Preferably, the surface film strip supply assembly includes a fixed film strip supply part, and the fixed film strip supply part is used to provide at least two fixed film strips to the battery sheet, and the fixed film strips are placed crosswise with the welding ribbon group; at least one The fixing film strip is used to fix the welding ribbon group on the first end of the front of the battery sheet; at least one fixing film strip is used to fix the welding ribbon group on the second end of the battery sheet front.

The ribbon group is positioned on the front of the cell through the setting of the fixed film strip supply part, and the fixed film strip and the solder ribbon group are placed crosswise to realize one film strip and multiple solder ribbons are fixed on the front of the cell at the same time .

Preferably, the battery sheet supply part also includes a tooling handling part, and the battery sheet supply part is used to simultaneously transport the battery sheet and the tooling, so that the i-th battery sheet is laid on the second half of the i-th ribbon group, and the i-th battery sheet is laid on the second half of the i-th ribbon group. i-1 tooling presses the first half of the i-th ribbon group above the i-1th cell; or, the battery string production equipment also includes a tooling handling device, which is used to provide the tooling to the conveying part, The tooling is used to press the first half of the i-th ribbon group on the i-1th cell; where i is any natural number greater than 0.

The loading of the tooling is realized through the tooling handling department or through the setting of a separate tooling handling device. Through the tooling, not only the positioning of the welding ribbon is realized, but also the welding ribbon is pressed onto the battery sheet, so that the film strip on the back can be better positioned. Ribbons are fixed to the cells.

Preferably, the battery string production equipment further includes a material unloading device, the unloading device is arranged behind the cell sheet feeding part or the tool handling device, the material unloading device includes a tool picking part and a tool moving part, and the tool picking part is installed on the tool moving part The driving end of the tooling moving part is used to drive the tooling picking part to remove the tooling from the conveying part.

Through the setting of the unloading device, the removal of the fixed ribbon on the back of the cell is realized.

Preferably, the battery string production equipment further includes a tooling handling part and a set of tooling placed on the conveying surface in advance, the conveying part drives the tooling to advance synchronously; the tooling handling part is used to circularly clamp a piece of tooling that is farthest from the initial end of the conveying surface, The tooling handling part is also used to move the above-mentioned tooling to the battery sheet with the first half of the ribbon group laid on the upper surface, so as to compress the ribbon group on the upper surface of the battery sheet; or, the tooling handling part is used for circular clamping. For the far piece of tooling, the tooling transfer department is also used to move the above-mentioned tooling to the battery sheet whose upper surface of the ribbon group is fixed by the surface film strip, so as to compress the upper surface of the battery sheet.

The piece of tooling farthest from the initial end of the conveying surface is clamped circularly by the tooling handling department and placed on the first half of the battery sheet with the ribbon group on the surface or the battery sheet with the ribbon group on the upper surface fixed by the surface film strip, realizing the tooling The recycling use improves the utilization efficiency of the tooling.

Preferably, the surface film strip supply assembly includes a front film strip supply part, and the front film strip supply part is used to apply a plurality of front film strips to the upper surface of the battery sheet synchronously along the advancing direction of the conveying part. The strips are in one-to-one correspondence with the ribbons of the ribbon set.

The welding ribbon group on the front side of the battery sheet is fixed on the battery sheet through the arrangement of the front film strip supply part.

Preferably, the front film strip supply part includes a front film strip supply roll and a rolling and pressing device, the front film strip supply roll provides the front film strip to the battery string, and the rolling and pressing device compresses the front film strip and applies it on the battery skewer.

The supply of the front film strips is realized by the setting of the front film strip supply roll, and the continuous rolling and pressing of the front film strips to the welding ribbon group on the front of the cell is realized by the setting of the rolling pressing device.

Preferably, the adhesive of the surface film strip and the back film strip is hot-melt glue, and the battery string production equipment also includes a hot-melt part arranged behind the surface film strip feeding assembly, and the hot-melt part is used to heat the battery string. To fix the surface film strip and the back film strip on the battery string.

The production of the battery string is realized by setting the surface film strip and the back film strip in the form of hot melt adhesive, which facilitates the connection of the welding strip and the battery sheet.

Preferably, the conveying part further includes a heating assembly arranged below the conveying surface, and the heating assembly is used for heating the back film strip attached to the lower surface of the battery string.

The application of the film strip on the back is realized through the setting of the heating component.

Preferably, the tooling includes a mounting frame and pressing pin rows arranged on the mounting frame, the pressing pin rows are arranged correspondingly to the welding ribbon groups, and each pressing pin row is used to compress one welding ribbon.

The uniform pressing of the ribbon is achieved through the setting of the pin row, which prevents the ribbon from being stuck to the cell due to uneven stress.

On the other hand, the present application also provides a battery string production method, the battery string production method comprising: continuously supplying a plurality of back film strips to the assembly line, and making the back film strips advance synchronously with the assembly line; Stack the ribbon group and the cell so that the i-th cell is laid on the second half of the i-th ribbon group, and the first half of the i+1th ribbon group is laid on the i-th cell, and The second half of each welding ribbon in the i-th ribbon group is laid on the back film strip in one-to-one correspondence; the surface film strip is pasted on the upper surface of the battery sheet, so that the i+1th welding ribbon group The first half is bonded to the front of the i-th cell, where i is any natural number greater than 0.

The feeding and laying of the back film strips is realized by the way that the back film strips follow the assembly line synchronously, which improves the feeding efficiency of the back film strips. Through the setting of the surface film strips, the welding ribbon is bonded to the front of the cell. Through The back film strip and the surface film strip as a whole realize the serial connection of the battery sheet and the welding ribbon.

Preferably, the surface film strips pasted on the upper surface of each battery sheet are at least two fixed film strips, the fixed film strips fix the welding ribbon group on the front of the battery sheet, and the fixed film strips and the welding ribbon group are vertical on the horizontal plane, The battery string production method also includes pressing the back film strip on the battery string with tooling;

or,

The film strips pasted on the upper surface of the battery sheet are a plurality of front film strips, and each front film strip covers a welding ribbon of the welding ribbon group. The battery string production method also includes using tooling to press the front film strips and the back film strips Tight on the surface of the cell;

The battery string production method also includes removing the tooling after the tooling presses the film strips tightly on the surface of the battery sheet.

The ribbon group is fixed on the front of the cell by fixing the film strip, and the back membrane strip and the solder ribbon carried by the back membrane strip are pressed and adhered to the cell by the tooling to realize the fixing of the front and back solder ribbons of the cell, or by The multi-heeled front film strips on the battery sheet adhere the welding ribbon on the front of the battery sheet to the battery sheet, and use the tooling to press and adhere the welding strip below the front film strip and the welding strip above the back film strip to the battery sheet. For the production of strings, after removing the tooling, it is convenient for the battery strings to be unloaded later.

Preferably, the surface film strips pasted on the upper surface of the cell are at least two fixed film strips and a plurality of front film strips, the fixed film strips pre-fix the welding ribbon group on the front of the battery sheet, and the fixed film strips and the welding ribbon group Vertical on the horizontal plane; the battery string production method also includes using tooling to compress the back film strips on the battery sheet, after the tooling presses the back film strips on the lower surface of the battery sheet, remove the tooling, and then cover the front film strips on the welding Each welding ribbon of the ribbon group, and the front film strip is pressed against the upper surface of the battery sheet synchronously by the roller.

The pre-fixation of the ribbon group is realized by fixing the membrane strips, the use of tooling is used to better increase the coating effect of the membrane strips and ribbons on the back of the cell, and the final alignment of the membrane strips on the front of the cell and the ribbon is achieved by setting the front membrane strips. Welded in series.

Preferably, after the back film strip and the surface film strip are attached to the surface of the battery sheet, the battery string production method further includes: heating the battery sheet to melt the adhesive of the back film strip and the surface film strip on the surface of the battery sheet, After the adhesive solidifies, a battery string is formed.

By heating the battery sheet, the back film strip, the surface film strip, the welding ribbon group and the battery sheet are firmly connected in series.

It is to be understood that both the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

Fig. 1 is a partial view of the battery string production equipment provided in one embodiment of the present application;

Figure 2 is a partially enlarged view of Figure 1A;

Fig. 3 is a partially enlarged view at Fig. 1B;

Fig. 4 is a schematic diagram of a tooling structure provided in an embodiment of the present application.

Wherein, the reference signs are as follows:

1 Conveying section; 2 Cell sheet; 3 Ribbon group; 4 Back film strip; 5 Fixed film strip; 6 Front film strip; 7 Tooling.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

The application provides a battery string production equipment, as shown in Figure 1, Figure 2, and Figure 3, the battery string production equipment includes a back film strip supply part, a cell supply part, a welding strip supply part, a surface Film strip feeding assembly and conveying part 1, wherein: the back film strip feeding part is used to place multiple parallel back film strips 4 on the conveying surface of the conveying part 1, and the conveying surface of the conveying part 1 drives the back film strips 4 advance synchronously; the ribbon supply part is used to provide the ribbon group 3 to the conveyor part 1, and the ribbon in the ribbon group 3 and the back film strip 4 are placed in one-to-one correspondence; the cell supply part is used to feed the conveyor part 1 The battery sheet 2 is provided; the surface film strip supply assembly is used to provide the surface film strips to the battery sheet 2, and the welding ribbon supply part and the battery sheet supply part stack the battery sheet 2 and the welding ribbon group 3 into a battery string to The i-th cell 2 is laid on the second half of the i-th ribbon group 3, the first half of the i+1-th ribbon group 3 is laid on the i-th cell 2, and the surface film strips the i-th +1 The first half of the ribbon group 3 is fixed on the i-th cell 2, and the back film strip 4 fixes the second half of the i-th ribbon group 3 on the i-th cell 2, where i is greater than 0 any natural number.

In one implementation, the rear film strip supply part continuously provides the back film strip 4 to the conveying part 1, and the conveying part 1 drives the back film strip 4 required by the battery string in advance, the ribbon supply part and the cell supply part The ribbon group 3 and the battery sheet 2 are alternately laid on the back film strip 4 . Of course, the rear film strip supply part can also gradually output the back film strip 4 along with the feeding of the ribbon supply part and the cell supply part.

The back film strips 4 are placed side by side on the conveying unit 1, the direction of the back film strips 4 is consistent with the direction of the welding strips in the welding strip group 3, and the numbers of the back film strips 4 correspond to the welding strips one by one.

In one implementation, the conveying unit 1 includes a conveying roller and a conveying belt, the conveying belt is sleeved on the conveying roller, and the conveying belt is provided with negative pressure adsorption holes for absorbing the battery sheet 2 and the back film strip 4 .

In one implementation, the conveying part 1 transports the back film strip 4 to the conveying surface, the ribbon supply part places the first welding ribbon group on the back film strip 4, and the cell sheet supply part places the first welding ribbon group The first battery piece, the first battery piece is placed on the second half of the first ribbon group, and then the ribbon supply device provides the second ribbon group to the conveying part 1, and the first half of the second ribbon group is placed on On the front side of the first cell, the second half of the second ribbon group extends from the top of the first cell and is placed on the back film strip 4. The cell supply part provides the second cell, and the second cell Place it on the second half of the second ribbon group, and then the ribbon feeding device provides the third ribbon group, and so on, until the placement of the entire battery string is completed. The welding ribbon is adhered to the back of the battery sheet 2 through the back film strip 4 . The surface film strip supply assembly is used to provide the surface film strips for fixing the front side of the battery sheet 2 to the battery sheet 2 .

Through the setting of the back film strip feeding part, the back film strip 4 is used to fix the welding ribbon on the back of the battery sheet 2 on the battery sheet 2, and the back film strip 4 is driven synchronously forward by the conveying part 1 to realize the rear film strip 4 continuous feeding, and improve the feeding efficiency of the back film strip 4, the use of the power source of the conveyor belt can also save the feeding drive of the back film strip 4 feeding device, reduce the equipment cost, realize the The welding ribbon on the front of the battery sheet 2 is fixed on the battery sheet 2, and the fixing of the battery sheet 2 and the welding ribbon is realized through the setting of the back film strip supply part and the surface film strip supply assembly, and the production of the battery string is completed.

In one implementation, the surface film strip supply assembly includes a fixed film strip supply part, and the fixed film strip supply part is used to provide at least two fixed film strips 5 to the battery sheet 2, and the fixed film strips 5 are connected with the welding ribbon. The group 3 is placed crosswise; at least one fixing film strip 5 is used to fix the welding ribbon group 3 on the first end of the front of the battery sheet 2; at least one fixing film strip 5 is used to fix the welding ribbon group 3 on the front of the battery sheet 2 the second end of .

After the fixed film supply part places the first half of a group of welding ribbons on the front of the battery sheet 2 every time the welding ribbon supply part, the fixed film strip 5 fixes the first half of the group of welding ribbons on the battery sheet 2, In order to avoid the deviation of the welding ribbon during the subsequent conveying and stacking process, thereby affecting the quality of the produced battery string.

The positioning of the ribbon group 3 on the front of the battery sheet 2 is realized through the setting of the fixed film strip supply part, and the cross placement of the fixed film strip 5 and the solder ribbon group 3 realizes that one film strip can simultaneously fix multiple solder ribbons on the battery sheet. The front side of battery sheet 2.

In one implementation, the battery sheet supply part further includes a tooling handling part, and the battery sheet supply part is used to simultaneously transport the battery sheet 2 and the tooling 7, so that the i-th battery sheet 2 is laid on the i-th ribbon group On the second half of 3, the i-1th tooling 7 presses the first half of the i-th ribbon group 3 above the i-1th cell 2; or, the battery string production equipment also includes a tooling handling device, The tooling handling device is used to provide the tooling 7 to the conveying part 1, and the tooling 7 is used to press the first half of the i-th ribbon group 3 above the i-1th cell 2; where i is any natural number greater than 0 .

In one implementation, the conveying part 1 transports the back film strip 4 to the conveying surface, the ribbon supply part places the first welding ribbon group on the back film strip 4, and the cell sheet supply part places the first welding ribbon group The first battery piece, at the same time, the tooling handling part in the battery piece feeding part also carries a tooling 7, and the tooling 7 fixes the first half of the first group of welding ribbons on the conveying part 1, and the first battery piece is placed on the second The second half of a ribbon group, and then the ribbon supply device provides the second ribbon group to the conveying part 1, the first half of the second ribbon group is placed above the front of the first cell, and the second ribbon group The second half extends from the top of the first cell and is placed on the back film strip 4. The cell supply part provides the second cell, and the second cell is placed above the second half of the second ribbon group at the same time The tooling handling department places a tooling 7 on the first half of the second ribbon group to press the first half of the second ribbon group above the first cell, and then the ribbon feeding device provides the third ribbon group, Repeat this until the arrangement of the entire battery string is completed. The welding ribbon is adhered to the back of the battery sheet 2 through the back film strip 4 .

The steps of placing the tooling 7 in the tooling handling device are the same as that of the tooling handling part, the difference is that the tooling handling device can be set up separately, and the tooling 7 can be moved independently, without interfering with the movement of the cell feeding part.

The loading of the tooling 7 is realized through the tooling handling department or through the setting of a separate tooling handling device. Through the tooling 7, not only the positioning of the welding ribbon is realized, but also the welding ribbon is pressed onto the battery sheet 2 to realize the film strip on the back side 4 It is better to fix the welding strip to the battery sheet 2.

In an implementation manner, the battery string production equipment further includes a material unloading device, which is arranged behind the battery sheet feeding part or the tooling handling device, and the material unloading device includes a tooling picking part and a tooling moving part, and the tooling picking part is installed At the driving end of the tool moving part, the tool moving part is used to drive the tool picking part to remove the tool 7 from the conveying part 1 .

Through the arrangement of the unloading device, the removal of the back side of the battery sheet 2 after the welding ribbon is fixed is realized.

In one implementation, the battery string production equipment also includes a tooling handling part and a set of tooling 7 pre-placed on the conveying surface. The conveying part 1 drives the tooling 7 to advance synchronously; The tooling 7 at the farthest end, and the tooling handling part is also used to move the above-mentioned tooling 7 to the battery sheet 2 on which the first half of the ribbon group 3 is laid on the upper surface, so as to compress the ribbon group 3 on the upper surface of the battery sheet 2; or , the tooling transfer part is used to circularly clamp a piece of tooling 7 farthest from the initial end of the conveying surface, and the tooling transfer part is also used to move the above-mentioned tooling 7 to the battery sheet 2 fixed by the surface film strip on the welding ribbon group 3 on the upper surface, so as to Press the ribbon group 3 on the upper surface of the battery sheet 2 tightly.

The piece of tooling 7 that is farthest from the initial end of the conveying surface is clamped circularly by the tooling transfer department and placed on the battery sheet 2 with the first half of the ribbon group 3 laid on the surface or the battery sheet 2 with the ribbon group 3 on the upper surface fixed by the surface film strip Above, the recycling of the tooling 7 is realized, and the utilization efficiency of the tooling 7 is improved.

In an implementation manner, in order to realize further fixing of the front soldering strips of the battery sheet 2, the surface film strip supply assembly includes a front film strip supply part, and the front film strip supply part is used to feed a plurality of front film strips 6 Along the forward direction of the conveying part 1, it is pasted on the upper surface of the battery sheet 2 synchronously, and the front film strips 6 correspond to the ribbons of the ribbon group 3 one by one.

The welding ribbon group 3 on the front side of the battery sheet 2 is fixed on the battery sheet 2 through the arrangement of the front film strip supply part.

In one implementation, the front film strip supply part includes a front film strip supply roll and a rolling and pressing device, the front film strip supply roll provides the front film strip 6 to the battery string, and the rolling and pressing device presses the front film strip 6 Press it tightly on the battery string.

In one implementation manner, the front film strip supply roll continuously supplies material to the front film strip 6 of the battery sheet 2 , and the film strip is pressed onto the welding strip of the battery sheet 2 by continuous rolling of the rolling pressing device. The rolling and pressing device includes rollers, which are arranged above the conveying part 1 , and when the conveying part 1 conveys, the rollers rotate to press the front film strip 6 onto the welding strip above the battery sheet 2 .

The supply of the front film strip 6 is realized through the setting of the front film strip supply roll, and the continuous rolling and pressing of the front film strip 6 onto the welding ribbon group 3 on the front side of the battery sheet 2 is realized through the setting of the rolling pressing device.

In one implementation, after the first half of the ribbon group 3 is placed on the upper surface of the corresponding battery sheet 2, the front film strip supply part will paste the front film strip 6 on the first half of the ribbon group 3, and then Then place tooling 7 to compress the front film strip 6, the battery sheet 2 and the back film strip 4, so that the welding ribbon group 3 and the battery sheet 2 remain relatively still during the moving process.

In an implementation manner, after the tooling 7 is removed from the battery sheet 2, the front film strip supply part presses the front film strip 6 onto the ribbon group 3 on the front of the battery sheet.

In one implementation, the adhesives of the surface film strip and the back film strip 4 are hot-melt adhesives, and the battery string production equipment also includes a hot-melt part arranged at the rear of the surface film strip feeding assembly, and the hot-melt part is used for It is used to heat the battery string to fix the surface film strip and the back film strip 4 on the battery string.

The production of the battery string is realized by setting the surface film strip and the back film strip 4 in the form of hot melt adhesive, which facilitates the connection of the welding strip and the battery sheet 2 .

In an implementation manner, the conveying part 1 further includes a heating assembly arranged below the conveying surface, and the heating assembly is used to heat the back film strip 4 attached to the lower surface of the battery string.

The accelerated application of the back film strip 4 is realized through the setting of the heating assembly.

In one implementation, as shown in FIG. 4 , the tooling 7 includes a mounting frame and a pin pressing row arranged on the mounting frame. root ribbon.

The uniform pressing of the solder ribbon is realized through the setting of the pressing pin row, which prevents the solder ribbon from being unable to adhere to the battery sheet 2 due to uneven stress.

On the other hand, the present application also provides a battery string production method. The battery string production method includes: continuously supplying a plurality of back film strips 4 to the assembly line, and making the back film strips 4 advance synchronously with the assembly line; Lay the ribbon group 3 and the battery sheet 2 in a predetermined order, so that the i-th battery sheet 2 is laid on the second half of the i-th ribbon group 3, and the first half of the i+1th ribbon group 3 is laid On the i-th battery sheet 2, and the second half of each ribbon in the i-th ribbon group 3 is laid on the back film strip 4 in one-to-one correspondence; the upper surface of the battery sheet 2 is pasted with a surface film strips to bond the first half of the i+1th ribbon group 3 to the front side of the i-th battery sheet 2, where i is any natural number greater than 0.

The supply of film strips 4 on the back side can be provided in advance with the film strips required for the entire battery string, or can be provided step by step along with the stacked production of battery sheets 2 and welding ribbons.

The feeding and laying of the back film strip 4 is realized by the way that the back film strip 4 follows the assembly line synchronously, which improves the feeding efficiency of the back film strip 4, and the welding ribbon is bonded to the cell 2 through the setting of the surface film strip. On the front side, the serial connection of the battery sheet 2 and the welding ribbon is realized through the back film strip 4 and the surface film strip as a whole.

In one implementation, the surface film strips attached to the upper surface of each battery sheet 2 are at least two fixed film strips 5, and the fixed film strips 5 fix the welding ribbon group 3 on the front of the battery sheet 2, and the fixed film strips 5 is perpendicular to the ribbon group 3 on the horizontal plane, and the production method of the battery string also includes pressing the back film strip 4 on the battery string by using the tooling 7; Mask strips 6, each front membrane strip 6 covers a welding ribbon of the welding ribbon group 3, and the battery string production method also includes using tooling 7 to press the front membrane strip 6 and the back membrane strip 4 on the surface of the battery sheet 2; The string production method also includes removing the tooling 7 after the tooling 7 presses the film strip on the surface of the cell sheet 2 .

The fixing film strip 5 can be used to pre-fix the welding strip on the battery string, and then the front film strip 6 is used to connect the welding strip and the battery sheet 2 in series to form a battery string in the subsequent process, or directly after laying the back film strip 4 The front film strip 6 is provided directly before the tooling 7 is placed, and then the back film strip 4 and the front film strip 6 are pressed together with the battery sheet 2 and the welding strip by the tooling 7 to form a battery string.

The ribbon group 3 is fixed on the front of the battery sheet 2 by fixing the film strip 5, and the back membrane strip 4 and the welding ribbon carried by the back membrane strip 4 are pressed and adhered to the battery sheet 2 by the tooling 7, so that the front of the battery sheet 2 is realized. Fix the welding ribbon on the back side, or stick the welding ribbon on the front side of the battery piece 2 to the battery piece 2 through multiple front membrane strips 6 on the battery piece 2, and use the tooling 7 to connect the welding ribbon under the front membrane strip 6 to the battery piece 2. The welding tape above the back membrane strip 4 is pressed and adhered to the battery sheet 2, realizing the production of battery strings, and after the tooling 7 is removed, it is convenient for subsequent battery string blanking.

In one implementation, the surface film strips attached to the upper surface of the battery sheet 2 are at least two fixed film strips 5 and a plurality of front film strips 6, and the fixed film strips 5 pre-fix the welding ribbon group 3 on the battery sheet. 2. On the front side, the fixed film strip 5 is perpendicular to the ribbon group 3 on the horizontal plane; the battery string production method also includes pressing the back film strip 4 on the battery sheet 2 by using the tooling 7, and pressing the back film strip 4 on the battery sheet 2 by the tooling 7. After the lower surface of the sheet 2 is removed, the tooling 7 is removed, and the front film strip 6 is covered on each ribbon of the ribbon group 3, and the front film strip 6 is pressed on the upper surface of the battery sheet 2 synchronously by the rollers.

In order to ensure the sticking effect of the back film strip 4, after stacking the welding ribbon and the battery sheet 2 on the back film strip 4, the back film strip 4 can be pressed tightly on the back of the battery sheet 2 with the tooling 7, and then the tooling 7 Move away, provide film strips to the front of the battery sheet 2, and use rollers to press the film strips tightly above the front of the battery sheet 2. This method of first providing the back film strip 4 and then providing the front film strip 6 does not need to segment the film strips, and the whole string of films and the front and rear films do not affect each other, which improves the application efficiency of the film strips.

The pre-fixation of the ribbon group 3 is realized by the fixed film strip 5, and the bonding effect of the film strip 4 on the back of the battery sheet 2 and the welding ribbon is better increased by using the tooling 7. The front film of the battery sheet 2 is realized by the setting of the front film strip 6 Final series welding of strip 6 to the ribbon.

In one implementation, after the back film strip 4 and the surface film strip are attached to the surface of the battery sheet 2, the battery string production method further includes: heating the battery sheet 2 to make the back film strip 4 and the surface film strip stick together. The mixture is melted on the surface of the battery sheet 2, and the battery string is formed after the adhesive is solidified.

By heating the battery sheet 2, the back film strip 4, the surface film strip, the welding ribbon group 3 and the battery sheet 2 are firmly connected in series. The serial production of battery strings is accelerated.

Other embodiments of the invention will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention invented herein. This application is intended to cover any modification, use or adaptation of the present invention, these modifications, uses or adaptations follow the general principles of the present invention and include common knowledge or conventional technical means in the technical field not invented by the present invention . The specification and examples are to be considered exemplary only, with the true scope and spirit of the invention indicated by the appended claims.

It should be understood that the present invention is not limited to the precise constructions which have been described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (14)

1. A battery string production equipment, characterized in that, the battery string production equipment comprises a rear film strip supply part, a cell sheet supply part, a welding ribbon supply part, a surface film strip supply assembly and a conveying part, in: The back film strip feeding part is used to place a plurality of parallel back film strips on the conveying surface of the conveying part, and the conveying surface of the conveying part drives the back film strips to advance synchronously; The welding ribbon supply part is used to provide the welding ribbon group to the conveying part, and the welding ribbons in the welding ribbon group and the back film strips are placed in one-to-one correspondence; The battery sheet supply part is used for supplying battery sheets to the conveying part; The surface film strip supply assembly is used to provide the surface film strips to the battery sheet, The ribbon supply part and the battery sheet supply part stack the battery sheet and the ribbon group into a battery string, so that the i-th battery sheet is laid on the second half of the i-th ribbon group section, the first half of the i+1th ribbon group is laid on the ith cell, The surface film strip fixes the first half of the i+1th ribbon group on the i-th cell, and the back membrane strip fixes the second half of the i-th ribbon group on the i-th cell. On the i cell, where i is any natural number greater than 0. 2. The battery string production equipment according to claim 1, characterized in that, the surface film strip supply assembly includes a fixed film strip supply part, and the fixed film strip supply part is used to supply the cells with At least two fixed film strips are provided, and the fixed film strips are intersected with the welding ribbon group; At least one fixing film strip is used to fix the ribbon group on the first end of the front side of the cell; At least one fixing film strip is used to fix the ribbon group on the second end of the front side of the cell. 3. The battery string production equipment according to claim 1, wherein the battery sheet supply part further includes a tooling handling part, and the battery sheet supply part is used to simultaneously transport the battery sheet and the tooling, so that the i-th battery sheet is laid on the second half of the i-th ribbon group, and the i-1 tool presses the first half of the i-th ribbon group tightly above a cell; or, The battery string production equipment further includes a tooling conveying device, the tooling moving device is used to provide tooling to the conveying part, and the tooling is used to compress the first half of the i-th ribbon group to the i-th 1 above the cell; Where i is any natural number greater than 0. 4. The battery string production equipment according to claim 3, characterized in that, the battery string production equipment further comprises a blanking device, and the blanking device is arranged at the battery sheet feeding part or the tooling handling device Afterwards, The unloading device includes a tool picking part and a tool moving part, the tool picking part is installed on the driving end of the tool moving part, and the tool moving part is used to drive the tool picking part to move the tool from the The delivery department moved out. 5. The battery string production equipment according to claim 1, characterized in that, the battery string production equipment further comprises a tooling handling part and a set of tooling placed on the conveying surface in advance, and the conveying part drives the The tooling advances synchronously; The tool handling part is used to circularly clamp a piece of the tool that is farthest from the initial end of the conveying surface, and the tool handling part is also used to move the tool to the battery sheet on which the first half of the ribbon group is laid on the upper surface , so as to compress the ribbon group on the upper surface of the battery sheet; or, The tooling handling part is used to circularly clamp the piece of the tooling farthest from the initial end of the conveying surface, and the tooling moving part is also used to move the tooling to the welding belt group on the upper surface fixed by the surface film strip. on the battery sheet to press the ribbon group on the upper surface of the battery sheet. 6. The battery string production equipment according to any one of claims 1-5, characterized in that, the surface film strip supply assembly comprises a front film strip supply part, and the front film strip supply part is used for The plurality of front film strips are attached to the upper surface of the battery sheet synchronously along the advancing direction of the conveying part, and the front film strips correspond to the welding ribbons of the welding ribbon group one by one. 7. The battery string production equipment according to claim 6, wherein the front film strip supply part comprises a front film strip supply roll and a rolling and pressing device, and the front film strip supply roll is directed to the The battery string provides a front film strip, and the rolling and pressing device presses and applies the front film strip on the battery string. 8. The battery string production equipment according to claim 1, characterized in that, the adhesive of the surface film strip and the back film strip adopts hot melt adhesive, and the battery string production equipment also includes a The hot-melt part at the rear of the surface film strip feeding assembly is used for heating the battery strings to fix the surface film strips and the back film strips on the battery strings. 9. The battery string production equipment according to claim 1 or 8, wherein the conveying part further comprises a heating assembly arranged below the conveying surface, and the heating assembly is used to heat the String the back membrane strips on the lower surface. 10. The battery string production equipment according to any one of claims 3-5, characterized in that, the tooling comprises a mounting frame and a pressing pin row arranged on the mounting frame, and the pressing pin row is connected with the pressing pin row Corresponding to the above-mentioned welding ribbon group, each pressing pin row is used to compress one welding ribbon. 11. A battery string production method, characterized in that the battery string production method comprises: Continuously supply a plurality of back film strips to the assembly line, and make the back film strips advance synchronously with the assembly line; Lay the ribbon group and battery slices in a predetermined order on the back film strip, so that the i-th battery slice is laid on the second half of the i-th ribbon group, and the first half of the i+1th ribbon group The segment is laid on the i-th cell, and the second half of each ribbon in the i-th ribbon group is laid on the back film strip in a one-to-one correspondence; A surface film strip is pasted on the upper surface of the battery sheet to bond the first half of the i+1th ribbon group to the front of the i-th battery sheet, where i is any natural number greater than 0. 12. The battery string production method according to claim 11, characterized in that, the surface film strips pasted on the upper surface of each battery sheet are at least two fixed film strips, and the fixed film strips combine the The welding ribbon group is fixed on the front side of the battery sheet, and the fixed film strip is perpendicular to the welding ribbon group on the horizontal plane, and the battery string production method further includes pressing the back membrane strip on the battery string with tooling; or, The film strips pasted on the upper surface of the battery sheet are a plurality of front film strips, each of the front film strips covers a welding strip of the welding strip group, and the battery string production method also includes using tooling to The front film strip and the back film strip are pressed tightly on the surface of the battery sheet; The battery string production method further includes removing the tooling after the tooling presses the membrane strip on the surface of the battery sheet. 13. The battery string production method according to claim 11, characterized in that, the surface film strips pasted on the upper surface of the battery sheet are at least two fixed film strips and a plurality of front film strips, and the fixed film strips The strip pre-fixes the ribbon group on the front of the battery sheet, and the fixing film strip is perpendicular to the ribbon group on the horizontal plane; The battery string production method further includes pressing the back film strip on the battery sheet with tooling, After the tooling presses the back film strip on the lower surface of the battery sheet, the tooling is removed, and the front film strip is covered on each ribbon of the ribbon group, and the The rollers simultaneously press the front film strips against the upper surface of the battery sheet. 14. The battery string production method according to claim 12 or 13, characterized in that, after the back film strip and the surface film strip are both pasted on the surface of the battery sheet, the battery string production method Also includes: The battery sheet is heated to melt the adhesive of the back film strip and the surface film strip on the surface of the battery sheet, and form a battery string after the adhesive is solidified.

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