CN109367206A - Screen printing equipment and cell stacking systems - Google Patents

Abstract

This application discloses a kind of screen printing apparatus and cell piece lamination system, belong to photovoltaic module production technical field.The screen printing apparatus includes feeding device and silk-screen printing device, feeding device is set to the preceding road station of silk-screen printing device, for providing at least a piece of cell piece to silk-screen printing device, silk-screen printing device printed conductive material in each main gate line at least a piece of cell piece, cell piece is full wafer cell piece, or be the battery blade unit with main gate line, battery blade unit is that full wafer cell piece breaks the cell piece obtained after piece.Cell piece is supplied at silk-screen printing device by the application by feeding device, from silk-screen printing device by way of silk-screen printing the printed conductive material in each main gate line of cell piece, substantially increase the printing efficiency of conductive material.

Description

Screen printing equipment and cell stacking systems

technical field

The invention belongs to the technical field of photovoltaic module production, and relates to a screen printing device and a cell stacking system.

Background technique

With the increasing rise of clean energy such as solar energy in my country, it has brought about the rapid development of my country's photovoltaic industry. In the production process of shingled photovoltaic modules, traditional-sized cells need to be cut into small pieces first, and then the small pieces are rearranged and fixed in a shingled manner to increase the light-receiving area per unit area of the module, thereby enhancing the photoelectric conversion efficiency.

In the production process of traditional shingled modules, conductive materials need to be added to the busbars of the cells. In traditional equipment, 6 sheets are applied at a time. In addition, the traditional method of adding conductive materials is the dispensing type, that is, the conductive materials are dispensed onto the busbars. or scrape coating, that is, drop the conductive material onto one end of the busbar, and apply the conductive material to the entire busbar with a scraper. However, these two methods are inefficient, resulting in low production efficiency of the entire production line.

SUMMARY OF THE INVENTION

In order to solve the problem of low production efficiency when adding conductive materials to the busbars of battery chips by using glue dispensing or blade coating in the related art, the present application provides a screen printing equipment and a battery chip stacking system. The specific technical solutions are as follows:

In a first aspect, a screen printing device is provided, the screen printing device includes a feeding device and a screen printing device, and the feeding device is arranged at a previous station of the screen printing device, and is used for feeding the screen printing device to the screen printing device. At least one cell is provided, and the screen printing device prints conductive material on each busbar on the at least one cell, the cell is a whole cell, or a cell unit with a busbar, and the cell unit is The cell obtained by breaking the whole cell.

The battery is supplied to the screen printing device through the feeding device, and the conductive material is printed on each busbar line of the battery by the screen printing device, which greatly improves the printing efficiency of the conductive material.

Optionally, the screen printing device includes a screen, a scraper assembly and a conductive material supply part, the screen is provided with a hollow area corresponding to a predetermined area of at least one battery slice, and the driving part in the scraper assembly drives the scraper from the first position of the screen. One end is moved to the second end to apply the conductive material supplied by the conductive material supply part to the entire area of the wire mesh, and the conductive material in the hollow area is applied to the predetermined area of the corresponding cell under the hollow area. The predetermined area is The area provided by the busbars of the cell.

The wire mesh is provided with a hollow area corresponding to a predetermined area of at least one cell sheet, so that when the scraper assembly moves from the first end to the second end of the wire mesh, the conductive material provided by the conductive material supply part passes through the hollow out of the wire mesh The area is printed on the predetermined area of the cell, that is, the busbar of the cell, so that the conductive material is printed on the busbar of the cell.

Optionally, the screen printing device further includes a printing platform, the feeding device places the cell sheets to be printed on the printing platform, the printing platform is provided with an adsorption mechanism, and the printing platform is arranged on the linear conveying device or the rotary conveying device.

By setting a printing platform with an adsorption mechanism, when printing conductive materials on the cells on the printing platform, the deviation of the cells can be avoided and the quality of the printed conductive materials can be guaranteed. The printing platform is set on a linear conveying device or a rotary conveying device. The design can be compatible with different cell transportation conditions.

Optionally, the feeding device is a conveyor belt, a rotating platform or a handling robot.

Optionally, the screen printing equipment includes a detection device for detecting whether the battery slices are qualified, the detection device obtains the positioning information of the qualified battery slices, and the feeding device arranges the corresponding battery slices according to the positioning information and provides them to the screen printing device.

Qualified cells and their positioning information are determined by setting the detection device, so that when the screen printing device prints the conductive material on the cells according to the positioning information, the printing angle can be properly adjusted to improve the printing quality.

Optionally, the screen printing equipment further includes a regularization device, the detection device obtains the positioning information of the qualified cell sheets, the regularization device regularizes the corresponding cell sheets according to the positioning information, and the feeding device provides the regularized cell sheets to the screen. printing device.

By arranging the regularizing device to regularize the battery sheet, the quality of the screen printing device when printing the conductive material on the battery sheet is ensured, the screen printing device can be saved to adjust the printing angle, and the printing efficiency is improved.

Optionally, the screen printing equipment further includes a storage box, the feeding device is a handling robot, and the feeding device absorbs the battery slices from the storage box and places them at the screen printing device;

or,

The screen printing equipment also includes a storage box and a suction mechanism arranged at the front station of the feeding device. The feeding device is a conveyor belt or a rotating platform, and the suction mechanism sucks the battery chips from the storage box and supplies them to the feeding device , the feeding device transports the cells to the screen printing device.

In a second aspect, a cell stacking system is provided. The cell stacking system includes the screen printing device and stacking device provided in the first aspect and various optional implementations of the first aspect. The screen printing The equipment is set at the front station of the lamination equipment, where:

The screen printing device prints conductive material on at least two battery sheets to be stacked, and the stacking device performs stacking processing on the battery sheets printed with the conductive material.

By using screen printing equipment to print conductive material on at least two battery sheets to be stacked before stacking, the efficiency of printing multiple battery sheets is greatly improved.

Optionally, the cell stacking system further includes dicing equipment and chip breaking equipment, wherein:

The dicing equipment and the breaking equipment are arranged in the front station of the screen printing equipment in sequence. Each of the obtained cell units includes busbars, and the screen printing equipment prints conductive materials on at least two cell units after breaking;

or,

The dicing equipment is installed in the front station of the screen printing equipment, and the slicing equipment is installed in the rear station of the screen printing equipment. The battery cell units all contain busbars. The screen printing equipment prints conductive materials on the diced cells, and the chip breaking equipment processes the cells printed with the conductive materials. Each cell obtained after breaking The cells all contain busbars printed with conductive materials, and the stacking equipment performs stacking processing on the battery cells printed with conductive materials.

By setting dicing equipment and breaking equipment to complete the breaking process of standard battery sheets, screen printing is performed on each broken battery sheet after breaking, which avoids the impact of breaking on the printing of conductive materials; The screen printing process is set before the film, that is, screen printing the conductive material on the whole cell, so as to avoid screen printing of the cells after multiple pieces due to the offset or inaccurate positioning of several cells. The problem of lower printing quality.

Optionally, the battery lamination system further includes a heating device disposed at the back station of the lamination device, and the heating device heats the battery strings obtained after lamination to melt the conductive material and form adhesive Laminated battery strings together.

The stacked battery sheets are heated by a heating device to melt the conductive material to form a stacked battery string bonded together.

Optionally, the cell stacking system further includes a bus bar feeding device and a bus bar welding device, wherein: the bus bar feeding device places a bus bar on the end of the stacked battery string, or, the bus bar feeding After the equipment places the bus bars, the lamination equipment uses the bus bars as the ends to stack the battery sheets; the bus bar welding equipment welds the bus bars and the battery strings.

By setting the bus bar feeding equipment, the bus bars can be automatically welded to the ends of the stacked battery strings, and the automatic process of welding the stacks and the bus bars is completed.

Optionally, the cell stacking system further includes a flux coating device, and the flux coating device applies flux to the bus bars provided by the bus bar feeding device; or, the battery stack system further includes a conductive material coating device, The conductive material applying device applies the conductive material to the bus bar feeding device; alternatively, the screen printing device also prints the conductive material to the bus bars provided by the bus bar feeding device.

By arranging a flux coating device or a conductive material coating device, the bus bars can be easily welded to the stacked battery strings, and the bonding quality between the bus bars and the battery strings is improved.

It is to be understood that the foregoing general description and the following detailed description are exemplary only and do not limit 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.

1 is a schematic structural diagram of a screen printing device provided in an embodiment of the present invention;

2A is a top view of a screen printing device provided in an embodiment of the present invention;

2B is a side view of a screen printing device provided in an embodiment of the present invention;

2C is a side view of a screen printing device provided in another embodiment of the present invention;

3 is a schematic structural diagram of a lamination device provided in an embodiment of the present invention

4 is a schematic structural diagram of a cell stacking system provided in an embodiment of the present invention;

5 is a schematic structural diagram of a cell stacking system provided in another embodiment of the present invention;

6A is a schematic structural diagram of a chip breaking device provided in an embodiment of the present invention;

6B is a partial schematic diagram of a chip breaking device provided in an embodiment of the present invention;

7A is a schematic structural diagram of a heating device provided in an embodiment of the present invention;

7B is a schematic structural diagram of a conveying device provided with a heating device provided in an embodiment of the present invention;

8A is a schematic structural diagram of a heating device provided in an embodiment of the present invention;

8B is a schematic diagram of the arrangement of infrared lamps in a heating lamp box of a heating device provided in an embodiment of the present invention.

Among them, the reference numerals are as follows:

10, screen printing equipment; 11, feeding device; 12, screen printing device; 121, screen; 122, scraper assembly; 1221, driving part; 1222, scraper; 1223, battery sheet; 1224, printing platform; 1225 , lifting mechanism; 13, storage box; 20, dicing equipment; 30, breaking equipment; 31, adsorption device; 311, wide groove; 312, adsorption pipeline; 313, rotating shaft; 314, guide groove; 315, cylinder 316, side plate; 32, breaking device; 2a, force application part; 33, lifting motion device; 331, power device; 332, guide device; 34, return device; 341, mounting frame; 342, elastic device; 40, lamination equipment; 41, lamination robot; 42, pick-up part; 421, lift cylinder; 422, suction part; 50, heating equipment; 51, heating bottom plate; 52, suction hole; 53, heating rod insertion hole; 54 55, heating rod; 56, temperature sensor; 57, light box; 571, heating lamp tube; 58, lifting device; 60, conveying device; 70, battery string.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with some aspects of the invention as recited in the appended claims.

In the production of battery strings by means of lamination, it is usually necessary to apply conductive materials, such as conductive glue, to the busbar lines of each cell to be laminated. However, in the current method, conductive material coating nozzles are used to spray the busbar lines. , This method usually requires multiple conductive material smear nozzles, and requires multiple smears to complete the battery slices required for one lamination, and the smear nozzle is affected by the concentration of the conductive material when spraying, and the smear nozzles are often blocked. In this case, the production personnel need to check the conductive material applied on the cell in real time, and the efficiency is very low.

In view of this, the present application provides a screen printing device to apply conductive material to the battery sheet. The screen printing device will be illustrated below with reference to FIG. 1 .

FIG. 1 is a schematic structural diagram of a screen printing device provided in an embodiment of the present invention. The screen printing device includes a feeding device 11 and a screen printing device 12 , and the feeding device 11 is arranged in the front lane of the screen printing device 12 The station is used for providing at least one cell sheet to the screen printing device 12 .

The feeding device 11 mentioned here can be a conveyor belt, a rotating platform or a handling robot. Generally speaking, when the feeding device 11 is a conveyor belt or a rotating platform, the screen printing device 12 is located at the end or side of the feeding device 11 .

The screen printing device 12 here prints conductive material on each busbar on at least one cell, the cell is a whole cell, or a cell unit with busbars, and the cell unit is a whole cell The battery slices obtained after the slices are broken.

When the battery string is produced by lamination, the standard battery is usually broken into a plurality of battery pieces (which can also become battery pieces). Therefore, the screen printing device 12 can print conductive material on the busbars on the plurality of split cell units.

When the battery sheet with the conductive material to be printed is a standard battery sheet, that is, when there are multiple busbar lines on the battery sheet, the conductive material can be printed on each busbar line of the standard battery sheet according to the actual needs, and then the splitting process is used. A standard cell breaker is a cell unit in which multiple pieces are printed with conductive materials.

However, when the cell to be printed with conductive material is a cell unit after breaking, in order to improve the efficiency, the conductive material may be printed on the busbar lines of multiple cell units at the same time.

Obviously, in practical applications, the screen printing device 12 can also print conductive materials to multiple standard cell sheets at the same time, and the number of cell sheets to be printed at one time can be set according to the actual timing requirements.

The conductive material mentioned here is generally conductive glue.

In a possible implementation, please refer to FIG. 2A , FIG. 2B and FIG. 2C , the screen printing device 12 includes a screen, a squeegee assembly and a conductive material supply part (not shown), and the screen is provided with corresponding In the hollow area of at least one predetermined area of the battery sheet, the driving part in the scraper assembly drives the scraper to move from the first end to the second end of the wire mesh, so as to apply the conductive material supplied by the conductive material supply part to the entire area of the wire mesh, The conductive material in the hollow area is smeared on the predetermined area of the corresponding battery slice below the hollow area, and the conductive material in the hollow area is applied on the predetermined area of the corresponding battery slice below the hollow area, so as to realize the use of wire mesh The purpose of quickly applying guide material to the cell. The predetermined area on the battery sheet mentioned here is the area possessed or occupied by the busbars of the battery sheet.

In actual production, the cells to be printed can be placed on the printing platform. Optionally, an adsorption mechanism may be provided on the printing platform, and the adsorption mechanism is used for adsorbing the cells to be printed on the printing platform to avoid the deviation of the cells during the printing process.

Optionally, the printing platform can be set on a linear conveying device or a rotating conveying device, so as to be compatible with different cell conveying methods.

Optionally, the scraper assembly may include a scraper and a driving part for driving the scraper to move. The number of scrapers can be the same as the number of busbars on the same group of cell sheets to be printed, or can be the same as the number of cell sheet units to be printed in the same group, as shown in FIG. 2B . In this case, each scraper is equipped with a separate lifting mechanism to control the lifting and lowering of the separate scraper.

In another possible implementation, a squeegee can be used to simultaneously print the battery sheet or a plurality of battery slice units to be printed. In this case, the length of the squeegee is generally greater than the length of the predetermined area on the battery slice to be coated with the conductive material. , as shown in Figure 2C.

The wire mesh here is provided with a hollow area corresponding to a predetermined area of at least one cell. For example, when a conductive material is applied to a cell, the wire mesh can open a hollow area according to the predetermined area of the cell to which the conductive material is to be applied; In order to improve the efficiency of applying the conductive material, a plurality of hollow areas may be set on the wire mesh, and each hollow area corresponds to a predetermined area of the battery sheet to be coated with the conductive material.

In this way, in the present application, the wire mesh is provided with a hollow area corresponding to a predetermined area of at least one cell sheet, so that when the scraper assembly moves from the first end to the second end of the wire mesh, the conductive material provided by the conductive material supply part passes through the wire mesh. The hollow area of the screen is printed on the predetermined area of the battery sheet, that is, the busbar line of the battery sheet, so that the conductive material is printed on the busbar line of the battery sheet.

In a possible implementation manner, in order to facilitate the storage of the battery slices, the screen printing device 12 may further include a printing platform, and the feeding device places the battery slices to be printed on the printing platform,

In order to avoid the offset of the battery sheets when printing conductive materials on the cells on the printing platform and ensure the quality of the printed conductive materials, an adsorption mechanism is provided on the printing platform. Obviously, when the feeding device 11 is a conveyor belt or a rotating platform, the screen printing device 12 may not be provided with a printing platform, and the conveyor belt or rotating platform can be used as the printing platform of the screen printing device 12. Correspondingly, the conveyor belt and the rotating platform There is also an adsorption mechanism on it.

Generally speaking, the adsorption mechanism includes an adsorption hole and a vacuum generator communicated with the adsorption hole, and the vacuum generator controls the adsorption hole to realize the adsorption function.

In actual production, because the cells are relatively fragile, or the cells are easily broken after breaking, and some cells are stained, these unqualified cells are usually recycled. In order to detect these unqualified cells The battery sheet, the screen printing equipment in this application may also include a detection device for detecting whether the battery sheet is qualified. The detection device provided in the embodiment of the present application can be used to detect whether the battery sheet is qualified, for example, the battery sheet with defects such as contamination and cracking is judged as unqualified.

In addition, in a possible implementation manner, there may be deviations in the process of conveying or loading the cells, and such deviations may cause part of the busbars not to be printed with conductive materials during subsequent screen printing , the non-busbar area may be printed with conductive materials. In order to improve the quality of subsequent screen printing, the detection device in this application can also obtain the positioning information of the remaining cells that are judged to be qualified. The positioning information is used for Indicates the position of the cell, such as the relative position of the cell, or the angle and orientation used to indicate the offset of the cell. The feeding device 11 aligns the corresponding cell according to the positioning information provided by the detection device, and then provides it to the wire mesh. Printing device 12 . Obviously, the feeding device 11 can be fed to the screen printing device 12 while being regular.

In this way, the present application determines the qualified battery slices and their positioning information by setting the detection device, so that when the screen printing device 12 prints the conductive material on the battery slices according to the positioning information, the printing angle can be properly adjusted to improve the printing quality.

In addition to the above-mentioned feeding device 11 having a regularizing function, in another possible implementation manner, the screen printing equipment may further include a regularizing device, and the detection device obtains the positioning information of the qualified battery slices, and the regularizing device detects the The positioning information provided by the device will align the corresponding cell sheets, and the feeding device 11 provides the regulated cell sheets to the screen printing device 12 . By arranging the regularizing device to regularize the cell, the quality of the screen printing device 12 when printing the conductive material on the cell is ensured, the screen printing device 12 is saved from adjusting the printing angle, and the printing efficiency is improved.

Obviously, the regularizing device here can be a device independent of the feeding device 11 , or it can be a device installed on the feeding device 11 .

In a possible implementation, the battery slices may be stored in the storage box 13 in advance, especially when the feeding device 11 is a handling robot, it is usually necessary to pick up the battery slices from the storage box 13 of the battery slices and put them on the storage box 13. In this case, the screen printing equipment provided in this application may also include a storage box 13, the feeding device 11 is a handling robot, and the feeding device 11 sucks the battery sheets from the storage box 13 and places them on the screen printing device. 12 places. Optionally, when the feeding device 11 is a handling robot, a plurality of pick-up parts may be provided on the handling robot at the same time, so as to pick up multiple battery sheets at the same time.

In another possible implementation, when the feeding device 11 is a conveyor belt or a rotating platform, a mechanism that usually needs to be transported feeds the battery chips in the storage box 13 to the feeding device 11. In view of this situation, this The screen printing equipment provided by the application may also include a storage box 13 and a suction mechanism arranged at the front station of the feeding device 11 , the feeding device 11 is a conveyor belt or a rotating platform, and the suction mechanism sucks the battery from the storage box 13 . After the sheets are provided to the feeding device 11 , the feeding device 11 transports the battery sheets to the screen printing device 12 .

To sum up, the screen printing equipment provided by the present application supplies the battery slices to the screen printing device through the feeding device 11, and the screen printing device supplies each busbar of the battery slices by screen printing. The conductive material is printed on it, which greatly improves the printing efficiency of the conductive material.

In addition, the present application also provides a cell stacking system. The cell stacking system includes a screen printing device and a stacking device as shown in FIG. 1 , and the screen printing device 10 is arranged in front of the stacking device 40 A station, wherein the screen printing equipment 10 prints conductive material on at least two battery sheets to be stacked, and the stacking equipment 40 performs stacking processing on the battery sheets printed with the conductive material.

As shown in FIG. 3 , which is a schematic structural diagram of a lamination device provided in an embodiment of the present invention, the lamination device 40 here may include a lamination robot 41 and a plurality of pick-up parts disposed at the operating end of the lamination robot 41 . 42, in order to realize the function of picking up multiple sheets at the same time, and the stacking robot 41 is controlled by the controller of the stacking robot or the controller of the battery sheet stacking system to realize single-sheet placement during stacking. The number of pick-up parts 42 here can be 2, 3, 4, 5 or 6, and the number of pick-up parts 42 can also be greater than 6.

Optionally, in another feasible embodiment, the stacking device may be composed of a positioning part and a plurality of pick-up parts, wherein the length of each pick-up part is the same, but the retraction amount is different, when the battery needs to be picked up. When the battery is being cut, the positioning part separates the picking parts according to the predetermined length of the picking interval, and the picking parts extend and pick up the battery slices; after picking up the battery slices, the picking parts retract. The battery slices on the pick-up part will not contact; the positioning part arranges each pick-up part according to a predetermined stacking interval length, and the pick-up part stacks the battery slices to the corresponding placement positions to realize the stacking of multiple battery slices.

Optionally, each pick-up part 42 may include a lift cylinder 421 and a suction member 422, and the suction member 422 may be a suction cup or a cuboid suction bar. Generally, the suction member 422 may include a vacuum suction cup, a vacuum vent pipe and a vacuum generator. The vacuum suction cup is connected to the vacuum generator through the vacuum vent pipe. When a certain pickup part 42 needs to absorb the battery chips, the corresponding lifting cylinder 421 is lowered. , drive the adsorption member 422 to the top of the battery sheet, the vacuum generator controls the vacuum suction cup of the adsorption member 422 to realize the adsorption function; when the battery sheet needs to be placed, the corresponding lifting cylinder 421 descends, and drives the adsorption member 422 to the top of the placement position, the vacuum generator Disconnect the adsorption function of the vacuum suction cup, and the adsorbed battery sheet falls to the placement position.

In a possible implementation, the cell stacking system further includes a dicing device 20 and a chip breaking device 30. In practical applications, the screen printing device 10 is installed between the dicing device 20 and the chip breaking device 30. Relationships can be implemented in at least two ways:

In the first method, please refer to FIG. 4 , which is a schematic structural diagram of a cell stacking system provided by an embodiment of the present application. The dicing device 20 and the chip breaking device 30 are sequentially arranged in front of the screen printing device 10 . At the station, the dicing equipment 20 performs dicing processing on the battery slices, and the dicing equipment 30 performs dicing processing on the dicing-processed battery slices. The screen printing apparatus 10 prints the conductive material on the at least two battery cell units after being split.

In this way, the dicing device 20 and the dicing device 30 are provided to complete the breaking process of the standard battery slices, and screen printing is performed on the respective broken battery slices after the slicing, so as to avoid the influence of the slicing on the printing of the conductive material. .

In the second method, please refer to FIG. 5 , which is a schematic structural diagram of a cell stacking system provided by another embodiment of the present application. The dicing equipment 30 is arranged at the subsequent station of the screen printing equipment 10, and the dicing equipment 20 performs dicing processing at the corresponding position of the cell. The device 10 prints the conductive material on the diced cells, and the chip breaking device 30 performs the split processing on the cells printed with the conductive material, and each cell obtained after the split contains a busbar printed with the conductive material. The lamination equipment 40 performs lamination processing on the battery sheet units printed with the conductive material.

Set up a screen printing process before breaking the pieces, that is, screen printing the conductive material on the whole battery piece, to avoid the offset or unpositioning of several battery pieces when screen printing multiple pieces of battery pieces. Accurately causes problems with lower print quality.

The above-mentioned scribing equipment 20 is usually a laser scribing method. In some applications, in order to avoid the damage to the front side of the battery slice caused by laser scribing, the back side of the battery slice can be diced during production.

Further, in a possible implementation manner, the battery slices are conveyed face up, the conveying device for conveying the battery slices is a hollow design, and the dicing device 20 is located below the battery slices to scribe the backside of the battery slices.

In another possible implementation manner, the battery sheets are transported with the back side up, the dicing device 20 scribes the back side of the battery sheets, and then the battery sheets are flipped 180 degrees by a turning device and the front side faces up. That is to say, the battery slice stacking system may further include a turning device, which is located at the rear of the dicing device 20, the dicing device 20 performs dicing processing on the back of the battery slice, and the turning device turns the diced battery slice over. 180°. By setting a flipping device, the battery sheet after being diced on the back side is flipped 180 degrees to ensure that the conductive material is printed on the busbar on the front side of the cell sheet.

The above-mentioned breaking device 30 can be shown in FIGS. 6A and 6B, FIG. 6A is a schematic structural diagram of the breaking device provided in an embodiment of the present invention, and FIG. 6B is a part of the breaking device provided in an embodiment of the present invention. Schematic. The chip breaking device 30 includes: an adsorption device 31, the adsorption device 31 is used to respectively adsorb each small piece to be broken, and the adsorption device corresponding to the N small pieces can be rotatably arranged according to the breaking sequence; The breaking device 32 has a force-applying portion, and the force-applying portion abuts against the adsorption device 31 in the order of breaking, and makes the adsorption device 31 rotate; and is used to drive the adsorption device 31 and/or the breaking device 32 to move relatively The lifting motion device 33, the breaking device 32 also includes a return device 34, the return device 34 is in contact with the adsorption device 311 corresponding to the first N pieces in the order of breaking, and is used to restore the adsorption device 311 to the whole piece. Put the slice.

In this embodiment, the breaking device 32 is fixedly arranged, and the lifting motion device provides power to make the adsorption device move toward the breaking device. The lifting device 33 drives the adsorption device 31 to move through the connection of the return device 34 . The lifting motion device 33 includes a power device 331 and a guide device 332 , and the power device 331 drives the return device 34 to move up and down along the guide device 332 .

In a possible implementation manner, a whole cell is cut with N-1 groove marks, and is broken into N small pieces, where N is a natural number greater than 1.

The breaking device 32 is a special-shaped pressing plate having a plurality of urging portions 2a. The plurality of force-applying parts are arranged in the form of wedge-shaped surfaces at the bottom of the special-shaped pressing plate, because the special-shaped pressing plate is selected to be broken from both ends to the middle. in the form of a wedge-shaped face. The contact part between the special-shaped pressing plate and the cylinder can be only an inclined surface, or can be in other forms such as a semicircular groove, a triangular groove, etc. In this embodiment, an inclined surface is used.

The adsorption of the whole sheet adopts air pressure adsorption, and adsorption holes are provided on the surface of the adsorption device 31 , and the adsorption pipes 312 are connected to the adsorption holes. In order to reduce the weight, the adsorption device 1 is also provided with a wide groove 311 .

The two ends of the adsorption device 31 are provided with rotating shafts 313 , and the rotating shafts 313 are slidably inserted into the vertical guide grooves 314 . The end of the adsorption device 31 is also provided with a cylinder 315 . The center of the cylinder 315 and the rotating shaft 313 are on the same horizontal plane of the adsorption device.

The return device 34 includes a mounting frame 341 connected to the lifting motion device 33 and an elastic device 342 arranged on the mounting frame 341 , the elastic device 342 is in contact with the cylinder 315 and the rotating shaft 313 ; the lifting motion device 33 Drive the mounting frame 341 to move upward, the elastic device 342 abuts against the support cylinder 315 and the rotating shaft 313 to follow, drives the adsorption device 31 to move up, and the force-applying portion 2a on the special-shaped pressure plate contacts the The cylinder and the rotating shaft are connected, and the adsorption device is rotated to complete the breaking; the lifting device moves down, and the adsorption device returns to its position under the action of the elastic device. The elastic device 342 is a spring with a pressure head, the bottom end of the spring is fixed, the pressure head abuts the cylinder 315 and the rotating shaft 313 of the adsorption device, and a long guide post can be set inside the spring to prevent the spring from warping. The guide groove 314 is provided on the side plate 316 , and the side plate 316 is fixed on the mounting bracket 341 .

In practical applications, it can be broken one by one from one end to the other, or it can be broken synchronously from both sides to the middle.

Optionally, still referring to FIG. 4 or FIG. 5 , the cell stacking system further includes a heating device 50 arranged at a subsequent station of the stacking device 40 , and the heating device 50 heats the battery strings obtained after stacking. . Optionally, the heating device 50 heats the battery string by a heating method (such as heating with a heating tube or heating with an infrared lamp, etc.) to melt the conductive material to form a laminated battery string bonded together.

The heating device 50 can be heated by a bottom plate, as shown in FIGS. 7A and 7B , or by an infrared lamp tube, as shown in FIGS. 8A and 8B .

FIG. 7A is a schematic structural diagram of a heating device provided in an embodiment of the present invention, and FIG. 7B is a schematic structural diagram of a conveying device provided with a heating device provided in an embodiment of the present invention. The heating device 50 is located on the conveyor belt of the conveying device 60 . Below, the conveying device 60 here is used for conveying the battery strings stacked by the stacking device 40 , and the heating device 50 located under the conveying belt can heat the lower part of the battery strings. The heating device 50 is composed of a plurality of heating bottom plates 51 arranged side by side. The adsorption hole 52 of the heating bottom plate 51 is connected to the adsorption device to provide downward adsorption force. The heating bottom plate 51 is also provided with a heating rod 55 insertion hole 53 and a temperature sensor insertion hole 54, and the heating bottom plate 51 is heated by the inserted heating rod 55. Heating, the temperature of the heating bottom plate 51 is monitored in real time by the temperature sensor 56, and the temperature signal is transmitted to the controller of the system, so as to control the heating power of the heating rod 55, so that the temperature of each heating bottom plate 51 can be adjusted independently, and each The temperature between the block heating base plates 51 may be the same or different.

8A is a schematic structural diagram of a heating device provided in an embodiment of the present invention. The heating device 50 includes a light box 57 and is located above the conveyor belt of the conveying device 60. The lifting device 58 drives the light box 57 to move up and down. Lamps 571 (such as common infrared lamps) heat the tops of the battery strings on the conveying device 60 . As shown in FIG. 8B , which is an arrangement diagram of the heating lamps 571 in the light box 57 , optionally, a condensing cover may be provided above the heating lamps 571 for concentrating the heat of the heating lamps 571 .

In a feasible implementation manner, the heating device may include two heating structures as shown in FIG. 7A and FIG. 8A , and the upper and lower parts of the battery sheets on the conveying device 60 are heated and welded at the same time.

The stacked battery sheets are heated by a heating device to melt the conductive material to form a stacked battery string bonded together.

To sum up, in the cell stacking system provided by the present application, by using screen printing equipment to print conductive materials on at least two cell sheets to be stacked before stacking, the printing of multiple cell sheets is greatly improved. s efficiency.

Other embodiments of the invention will readily suggest themselves to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the invention which follow the general principles of the invention and which include common knowledge or conventional techniques in the art to which the invention is not invented . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

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

Claims (12)

1. A screen printing device, characterized in that, the screen printing device comprises a feeding device and a screen printing device, and the feeding device is arranged at the front station of the screen printing device, and is used for Provide at least one cell sheet to the screen printing device, and the screen printing device prints conductive material on each busbar line on the at least one cell sheet, and the cell sheet is a whole cell sheet or a tape A cell unit with busbars, the cell unit is a cell obtained by breaking the whole cell. 2 . The screen printing equipment according to claim 1 , wherein the screen printing device comprises a screen, a scraper assembly and a conductive material supply part, and a predetermined area corresponding to at least one battery sheet is opened on the screen. 3 . the hollow area, the driving part in the scraper assembly drives the scraper to move from the first end to the second end of the wire mesh, so as to apply the conductive material supplied by the conductive material supply part to the entire area of the wire mesh , the conductive material in the hollow area is smeared on a predetermined area of the battery sheet corresponding to the hollow area, and the predetermined area is the area provided by the busbars of the battery sheet. 3 . The screen printing device according to claim 2 , wherein the screen printing device further comprises a printing platform, and the feeding device places the battery sheet to be printed on the printing platform, and the 3 . An adsorption mechanism is arranged on the printing platform, and the printing platform is arranged on a linear conveying device or a rotary conveying device. 4 . The screen printing equipment according to claim 1 , wherein the feeding device is a conveyor belt, a rotating platform or a handling robot. 5 . 5 . The screen printing equipment according to claim 1 , wherein the screen printing equipment comprises a detection device for detecting whether the battery slices are qualified, the detection device obtains the positioning information of qualified battery slices, and the supply According to the positioning information, the material device arranges the corresponding cell sheets and provides them to the screen printing device. 6 . The screen printing device according to claim 5 , wherein the screen printing device further comprises a regularizing device, the detection device obtains the positioning information of the qualified cell sheets, and the regularizing device is based on the positioning information. 7 . The information will be regularized corresponding to the cell sheets, and the feeding device will provide the regular cell sheets to the screen printing device. 7 . The screen printing equipment according to claim 1 , wherein the screen printing equipment further comprises a material storage box, the feeding device is a handling robot, and the material supplying device starts from the material storage box. 8 . After sucking the battery sheet, it is placed at the screen printing device; or, The screen printing equipment also includes a storage box and a suction mechanism arranged at the front station of the feeding device, the feeding device is a conveyor belt or a rotating platform, and the suction mechanism is extracted from the storage box. The battery sheets are sucked and supplied to the feeding device, and the feeding device transports the battery sheets to the screen printing device. 8. A cell stacking system, characterized in that, the cell stacking system comprises the screen printing device and stacking device according to any one of claims 1-7, and the screen printing device is provided with At the front station of the lamination equipment, wherein: The screen printing device prints a conductive material on at least two battery sheets to be stacked, and the stacking device performs stacking processing on the battery sheets printed with the conductive material. 9. The cell stacking system according to claim 8, wherein the cell stacking system further comprises a dicing device and a chip breaking device, wherein: The dicing equipment and the dicing equipment are sequentially arranged in the front station of the screen printing equipment, the dicing equipment performs dicing processing on the battery slices, and the dicing equipment dicing The battery slices are subjected to a breaking process, and each battery slice unit obtained after breaking the slices includes a busbar, and the screen printing equipment prints conductive materials on at least two battery slice units after the breaking of the slices; or, The dicing equipment is arranged at the front station of the screen printing equipment, and the chip breaking equipment is arranged at the rear station of the screen printing equipment, and the dicing equipment is performed at the corresponding position of the battery sheet. Dicing process, each cell unit after dicing contains busbars, the screen printing equipment prints conductive material on the diced battery, and the breaking device prints the conductive material on the battery The chip-breaking process is performed, and each battery chip unit obtained after chipping includes a busbar printed with a conductive material, and the stacking device performs a stacking process on the battery chip unit printed with the conductive material. 10 . The cell stacking system according to claim 8 , wherein the cell stacking system further comprises a heating device arranged at a post-processing station of the stacking device, and the heating device is used for stacking the stacks. 11 . The resulting battery string is then heat treated to melt the conductive material to form a laminated battery string that is bonded together. 11. The cell stacking system according to claim 8, wherein the cell stacking system further comprises a busbar feeding device and a busbar welding device, wherein: The bus bar feeding device places the bus bars at the end of the stacked battery string, or, after the bus bar feeding device places the bus bars, the stacking device uses the bus bars as the end to carry out the battery operation. laminations of sheets; The bus bar welding apparatus welds the bus bar and the battery string. 12 . The battery chip stacking system according to claim 1 , wherein the battery chip stacking system further comprises a flux coating device, and the flux coating device provides the busbar supplying device with the busbar. 13 . Apply flux to the strip; Alternatively, the battery sheet stacking system further includes a conductive material coating device, and the conductive material coating device applies conductive material to the bus bar feeding device; Alternatively, the screen printing device further prints conductive material to the bus bars provided by the bus bar feeding device.