Film pasting device of battery piece and manufacturing equipment of photovoltaic battery

Abstract

The utility model discloses a film pasting device of a battery piece and manufacturing equipment of a photovoltaic cell, the film pasting device of the battery piece comprises a bearing platform, the bearing platform comprises an adsorption mechanism, an adsorption port of the adsorption mechanism is located on a bearing surface of the bearing platform, and the bearing surface is provided with a first area used for bearing a mask plate; the area of the flexible part is larger than that of the first region or the distance of the edge of the flexible part exceeding the edge of the mask is 5mm-500mm; the driving assembly is used for driving all or part of the flexible part to bulge in the direction close to the bearing table under the action of air pressure, or the driving assembly is used for driving all or part of the flexible part to move in the direction close to the bearing table. The flexible part covers the mask plate on the bearing table, the flexible part is evenly pressed on the mask plate, the cell and the mask plate are attached more tightly through the even pressure effect of the flexible part, and the film attaching quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of film pasting, in particular to a film pasting device for a battery sheet and manufacturing equipment for a photovoltaic battery. Background Art

[0002] In the process of solar cell processing, it is often necessary to attach a mask to the surface of the silicon wafer to prepare functional layers such as electrodes on the surface of the silicon wafer; in the process of chip processing, it is often necessary to attach a protective film to the surface of the chip to prevent physical damage or chemical corrosion on the chip surface. At present, after attaching a mask to the silicon wafer or a protective film to the chip surface, mechanical pressing is generally used to make the mask or protective film fit more closely with the silicon wafer or chip to improve the quality of the film. However, the use of mechanical pressing or attaching the mask to the cell is highly unstable, and uneven pressure often causes silicon wafer cracks or chip damage. Utility Model Content

[0003] The utility model aims to provide a film pasting device for a cell and a manufacturing device for a photovoltaic cell, so as to improve the film pasting quality and reduce the hidden cracks of the cell.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A film sticking device, comprising:

[0006] A carrying platform, the carrying platform comprises an adsorption mechanism, the adsorption port of the adsorption mechanism is located on the carrying surface of the carrying platform, and the carrying surface has a first area for carrying the mask;

[0007] A flexible member and a driving assembly, wherein the area of ​​the flexible member is larger than the area of ​​the first region or the edge of the flexible member exceeds the edge of the mask by 5 mm to 500 mm;

[0008] The driving assembly is used to drive the flexible member to bulge all or partly toward the bearing platform through the action of air pressure, or the driving assembly is used to drive the flexible member to move all or partly toward the bearing platform.

[0009] When the film pasting device provided by the utility model is used, the mask is first placed in the first area of ​​the carrier, the adsorption port of the adsorption mechanism is located in the first area, and the adsorption port of the adsorption mechanism adsorbs the mask to fix the mask on the carrier by adsorption. Then, the battery cell is placed on the mask, and the driving component can drive the whole or part of the flexible part to bulge in the direction close to the carrier through the action of air pressure, or the driving component can drive the whole or part of the flexible part to move in the direction close to the carrier, so that the flexible part finally covers the battery cell on the carrier, and the flexible part is evenly pressed on the battery cell. The uniform pressure of the flexible part makes the battery cell and the mask fit more closely, thereby improving the quality of film pasting. In addition, the pressure of the flexible part on the battery cell is more uniform, and the pressure of the battery cell is more uniform, which is not easy to form stress concentration, and can reduce the situation of hidden cracks in the battery cell.

[0010] In addition, in the prior art, the mask is adsorbed and placed on the battery cell, and then the mask is mechanically pressed to fit the mask and the battery cell. Since the mask is very soft and the hollow area on the mask is finely shaped, the mask is easily deformed when it is adsorbed, which leads to poor alignment accuracy between the mask and the battery cell. In addition, the hollow area of ​​the mask needs to be avoided during adsorption and positioning. The adsorption position needs to be adjusted continuously during the adsorption process, resulting in low production efficiency. When using the film pasting device of the present application, after the mask is placed on the carrier, the battery cell is placed on the upper side of the mask, and then the battery cell is pressed to fit the mask. The hardness of the battery cell is higher than that of the mask, and it is not easy to deform during the adsorption process, which is convenient for ensuring the alignment accuracy between the battery cell and the mask. There is no hollow area on the battery cell, so there is no need to avoid the hollow area during adsorption and positioning. It is easy to position during the adsorption process, which improves production efficiency.

[0011] In one implementation, the flexible member includes a diaphragm; the film laminating device also includes a shell, the diaphragm is sealed and connected to the shell, and the diaphragm and the shell together form an air cavity. In this solution, after the battery cell is attached to the mask on the carrier, air is inflated into the air cavity, so that the diaphragm gradually bulges toward the carrier until the diaphragm covers and presses on the side of the battery cell away from the mask. The pressure exerted by the diaphragm on the battery cell is relatively uniform, so that the battery cell and the mask are tightly attached, and stress concentration is not easy to form.

[0012] In one implementation, the flexible member includes an airbag; the laminating device also includes a shell, and the airbag is connected to the shell. After the battery cell is laminated to the mask on the carrier, air is inflated into the airbag to swell the airbag, and the airbag gradually approaches the carrier toward the side of the carrier until the airbag covers and presses on the side of the battery cell facing away from the mask, and the force of the airbag makes the battery cell and the mask fit tightly.

[0013] In one implementation, a groove is provided on one side of the housing facing the support platform; the diaphragm and the inner wall of the groove together form an air cavity, or the airbag is located in the groove. The limiting effect of the side walls around the groove prevents the diaphragm or the airbag from being displaced and can be accurately pressed on the battery cell.

[0014] In one implementation, a sealing gasket is provided on the bottom wall of the shell facing the supporting platform, so that the sealing gasket can be used to seal between the shell and the supporting platform, and the sealing gasket can prevent the shell from bumping and damaging the supporting platform.

[0015] In one implementation, the shell is provided with air holes, which are connected to the inside of the air cavity or the inside of the airbag, so that air can be directly inflated into the air holes of the shell during inflation, which is more convenient for inflation operation; and / or,

[0016] The carrier platform is provided with an exhaust hole, and the opening of the exhaust hole is located in an area outside the first area of ​​the carrier surface and in an area that can be covered by the diaphragm or the airbag. During the swelling process of the diaphragm and the airbag, the gas in the shell is discharged from the exhaust hole. The exhaust hole can also be used to form a negative pressure on the surface of the carrier platform to adsorb the diaphragm or the airbag, so that the diaphragm or the airbag can keep pressing the battery cell while making the pressure distribution of the diaphragm or the airbag more uniform; or the opening of the exhaust hole is located in the first area of ​​the carrier surface and corresponds to the hollow area of ​​the mask plate. In this way, the exhaust hole can be used to form a negative pressure in the hollow area of ​​the mask plate, and the battery cell presses the mask plate under the action of the diaphragm or the airbag and the negative pressure, so that the fit between the battery cell and the mask plate is tighter, further improving the quality of the film pasting.

[0017] In one implementation, the flexible member includes a flexible film, the driving assembly includes a plurality of guide members, a plurality of tension members and a first driving member, two tension members are located between adjacent guide members, the two tension members can flatten and tighten the flexible film passing between the two tension members, and the first driving member can drive the tension member to move closer to or away from the supporting platform. In this solution, the first driving member can drive the tension member to move below the supporting surface to ensure that the flexible film covers the battery cell and can apply sufficient pressure to the battery cell.

[0018] In one implementation, the tensioning member includes a support plate and two groups of rollers disposed on the support plate, and the flexible film passes through the two groups of rollers; or, the tensioning member includes a support plate and a clamping member disposed on the support plate, and the clamping member can clamp the flexible film. Such a configuration has a simple structure and is easy to operate.

[0019] In one implementation, the material of the diaphragm, airbag or flexible membrane is polypropylene, polyethylene, polyethylene terephthalate, polyimide, polyolefin copolymer, polyvinyl chloride and / or rubber. The above materials have specific elasticity, good mechanical properties, and good corrosion resistance, and are suitable for use as diaphragms, airbags or flexible membranes; and / or,

[0020] The thickness of the diaphragm, airbag or flexible film is 12 μm-500 μm, so as to prevent material waste while ensuring the mechanical properties of the diaphragm, airbag or flexible film.

[0021] In one implementation, a pressing plate is further included, and the flexible member includes a flexible layer fixed to the bottom wall of the pressing plate; the driving component is used to drive the pressing plate to move closer to or away from the carrier. After the battery cell is attached to the mask on the carrier, the driving component drives the pressing plate and the flexible layer to move and gradually approach the carrier until the flexible layer presses the battery cell, so that the flexible layer presses the battery cell evenly, so that the battery cell and the mask are more closely attached.

[0022] In one implementation, the flexible layer includes a silicone layer, a rubber layer and / or an elastic airbag, so that excessive pressure on the flexible layer can be avoided to damage the battery cell.

[0023] In one implementation, the pressing plate includes a venting mechanism, the venting mechanism has a plurality of first air ports and second air ports that are connected, and the plurality of first air ports are located on the surface of the flexible layer;

[0024] The film laminating device also includes an air pump connected to the second air port of the ventilation mechanism, and the air pump forms a negative pressure at the first air port when pumping air, or forms a positive pressure at the first air port by blowing air. In this scheme, the pressing plate can also be used to adsorb the battery cell, that is, after the mask is placed on the carrier, the air pump is used to pump air, and a negative pressure is formed at the first air port to adsorb the battery cell. The driving device drives the pressing plate and the battery cell to move and place the battery cell on the mask, and then the air pump blows air to form a positive pressure at the first air port. Multiple first air ports blow air to the battery cell to make the battery cell and the mask fit more closely.

[0025] In one implementation, the first area includes a first partition and a second partition, and the second partition surrounds the first partition; two sets of independent adsorption mechanisms are arranged in the carrier, wherein the adsorption port of the first set of adsorption mechanisms is located in the first partition, and the adsorption port of the second set of adsorption mechanisms is located in the second partition. The adsorption port of the adsorption mechanism located in the first partition can suck the air in the hollow area to maintain negative pressure in the hollow area, thereby making the battery cell and the mask fit more closely and improving the quality of film lamination. The adsorption port of the adsorption mechanism located in the second partition can adsorb the mask to fix the mask.

[0026] A photovoltaic cell manufacturing device comprises a cell film pasting device as described in any one of the above.

[0027] Compared with the prior art, the beneficial effects of the photovoltaic cell manufacturing equipment provided in the present application are the same as the beneficial effects of the above-mentioned cell film laminating device, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0029] Figure 1 A schematic diagram of the structure of a film sticking device provided in one embodiment of the utility model;

[0030] Figure 2 A schematic diagram of a diaphragm pressing a battery cell provided by an embodiment of the utility model;

[0031] Figure 3 A schematic diagram of an air bag compressing a battery cell provided by another embodiment of the utility model;

[0032] Figure 4 A schematic structural diagram of a film sticking device provided in another embodiment of the utility model;

[0033] Figure 5 A schematic diagram of a flexible film provided in an embodiment of the utility model compressing a battery sheet;

[0034] Figure 6 A schematic diagram of a pressing plate adsorbing a battery cell according to an embodiment of the utility model;

[0035] Figure 7 A schematic diagram of placing a battery cell on a pressing plate provided in an embodiment of the utility model;

[0036] Figure 8 A schematic diagram of a pressing plate provided in an embodiment of the utility model being away from the supporting platform.

[0037] Reference numerals:

[0038] 1-housing, 1a-air hole, 2-diaphragm, 3-supporting platform, 3a-exhaust hole, 3b-adsorption mechanism, 4-sealing pad, 5-battery cell, 6-mask, 7-airbag, 8-flexible membrane, 9-guide, 10-tensioning member, 10a-roller, 11-pressing plate. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0042] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0043] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] The film pasting device provided by the embodiment of the utility model includes a carrier 3, a flexible member and a driving assembly. During use, the upper surface of the carrier 3 is a bearing surface. The bearing surface is used to bear the mask plate 6. Specifically, the bearing surface has a first area for bearing the mask plate 6. The mask plate 6 can be placed in the first area of ​​the carrier 3, that is, the area covered by the mask plate 6 is the first area (including the bearing surface at the hollowed-out part of the mask plate). The carrier 3 includes an adsorption mechanism 3b, and the adsorption port of the adsorption mechanism 3b is located on the bearing surface of the carrier 3. The adsorption port forms a negative pressure on the surface of the bearing surface, so that the mask plate 6 can be adsorbed on the surface of the bearing surface to fix the mask plate 6.

[0045] The area of ​​the flexible member is larger than the area of ​​the first region, or after the flexible member covers the mask 6, the edge of the flexible member exceeds the edge of the mask 6 by 5mm-500mm, so as to ensure that the flexible member can completely cover the mask 6. The driving component drives the entire or part of the flexible member to swell in the direction close to the carrier 3 through the action of air pressure, that is, under the action of air pressure, the entire or part of the flexible member gradually swells and approaches the carrier 3 to cover the battery cell on the carrier 3. Or the driving component drives the entire or part of the flexible member to move in the direction close to the carrier 3, that is, the driving component moves and then drives the entire or part of the flexible member to move so as to gradually approach the carrier 3 and cover the battery cell on the carrier 3.

[0046] When the film pasting device provided by the utility model is used, the mask plate 6 is first placed in the first area of ​​the carrier 3, the adsorption port of the adsorption mechanism 3b is located in the first area, and the adsorption port of the adsorption mechanism 3b adsorbs the mask plate 6, so that the mask plate 6 is fixed on the carrier 3 by adsorption, and then the battery cell 5 is pasted on the side of the mask plate 6 away from the carrier. Then, the driving component drives the whole or part of the flexible member to bulge in the direction close to the carrier 3 through the action of air pressure, or the driving component drives the whole or part of the flexible member to move in the direction close to the carrier 3, and finally the flexible member covers the battery cell 5 on the carrier 3, and the flexible member is evenly pressed on the battery cell 5, and the uniform pressure of the flexible member makes the battery cell 5 and the mask plate 6 fit more closely, thereby improving the film pasting quality. In addition, the pressure of the flexible member on the battery cell 5 is more uniform, and compared with the mechanical pressing of the battery cell 5 in the prior art, the pressure of the battery cell 5 is more uniform, and it is not easy to form stress concentration, which can reduce the situation of hidden cracks in the battery cell 5.

[0047] In addition, in the prior art, the mask is adsorbed and placed on the battery cell, and then the mask is mechanically pressed to fit the mask and the battery cell. Since the mask is very soft and the hollow area on the mask is finely shaped, the mask is easily deformed when adsorbed, which leads to poor alignment accuracy between the mask and the battery cell. In addition, the hollow area of ​​the mask needs to be avoided during adsorption and positioning. The adsorption position needs to be adjusted continuously during the adsorption process, and the production efficiency is low. When using the film pasting device of the present application, after the mask 6 is placed on the carrier 3, the battery cell 5 is placed on the upper side of the mask 6, and then the battery cell 5 is pressed to fit the battery cell 5 with the mask 6. The hardness of the battery cell 5 is higher than that of the mask 6, and it is not easy to deform during the adsorption process, which is convenient for ensuring the alignment accuracy between the battery cell 5 and the mask 6. There is no hollow area on the battery cell 5, and it is not necessary to avoid the hollow area during adsorption and positioning. It is easy to position during the adsorption process, which improves production efficiency.

[0048] Specifically, the distance that the edge of the flexible member exceeds the edge of the mask 6 is 5mm, 50mm, 100mm, 150mm, 200mm, 250mm, 300mm, 350mm, 400mm, 450mm or 500mm, preferably 100mm-300mm. Here, the edge of the flexible member exceeds the edge of the mask, which means that any edge of the flexible member exceeds the edge of the mask. This can prevent the flexible member from shifting during movement or swelling and failing to completely cover the battery cell 5. In addition, the adsorption mechanism 3b includes an adsorption channel opened inside the carrier 3.

[0049] like Figure 1 As shown, in a specific embodiment, the flexible member includes a diaphragm 2, which is elastic. Under the action of air pressure, the diaphragm 2 can bulge in a direction close to the support platform 3 in whole or in part. The film sticking device also includes a shell 1, and the diaphragm 2 is sealed and connected to the shell 1. Specifically, the diaphragm 2 and the shell 1 can be bonded, connected by screws, or connected by snap-fit ​​parts. The diaphragm 2 and the shell 1 together form an air cavity, that is, after the diaphragm 2 is sealed and connected to the shell 1, the space between the diaphragm 2 and the shell 1 forms an air cavity. When the air cavity is inflated, the diaphragm 2 bulges under the action of air pressure, gradually moving away from the shell 1 and gradually approaching it. As shown in FIG. Figure 2 As shown, in this embodiment, after the battery cell 5 is fitted with the mask plate 6 on the supporting platform 3, air is inflated into the air cavity to cause the diaphragm 2 to gradually bulge toward the supporting platform 3 until the diaphragm 2 covers and presses on the side of the battery cell 5 away from the mask plate 6. The pressure exerted by the diaphragm 2 on the battery cell 5 is relatively uniform, so that the battery cell 5 and the mask plate 6 are closely fitted without easily forming stress concentration.

[0050] like Figure 3 As shown, the flexible member includes an airbag 7, which is elastic. Under the action of air pressure, the airbag 7 gradually swells, so that the side of the airbag 7 facing the support platform 3 gradually swells toward the support platform 3. In this embodiment, a part of the airbag 7 swells toward the support platform 3. The airbag 7 has an air port, and the air port of the airbag 7 is inflated to swell the airbag 7, and the air in the airbag 7 is discharged from the air port to shrink the airbag 7. The film sticking device also includes a shell 1, and the airbag 7 is connected to the shell 1. Specifically, the airbag 7 and the shell 1 can be bonded, connected by a screw or connected by a clamp.

[0051] By adopting the above technical solution, after the battery cell 5 is fitted with the mask plate 6 on the supporting platform 3, air is inflated into the airbag 7 to make the airbag 7 swell, and the airbag 7 gradually approaches the supporting platform 3 toward the side of the supporting platform 3 until the airbag 7 covers and presses on the side of the battery cell 5 facing away from the mask plate 6. The force of the airbag 7 makes the battery cell 5 and the mask plate 6 fit tightly.

[0052] In the above two embodiments, the driving component can also drive the housing 1 to approach or move away from the supporting platform 3. When the diaphragm 2 or the airbag 7 is required to press the battery cell 5, the driving component drives the housing 1 to gradually approach the supporting platform 3 until the housing 1 is pressed on the supporting platform 3, and at the same time, the diaphragm 2 or the airbag 7 swells under the action of air pressure to press the battery cell 5. In this way, the driving component drives the diaphragm 2 or the airbag 7 to move together with the housing 1, ensuring that the diaphragm 2 or the airbag 7 can be evenly pressed on the battery cell 5 without deviation.

[0053] In a preferred embodiment, a groove is provided on the side of the outer shell 1 facing the supporting platform 3, that is, the side of the outer shell 1 facing the supporting platform 3 is recessed inward to form a groove, and the edges of the groove can abut against the supporting platform 3, and when the outer shell 1 abuts against the supporting platform 3, the groove can cover the battery cell 5 and the mask plate 6.

[0054] like Figure 1 As shown, the diaphragm 2 and the inner wall of the groove together form an air cavity. Specifically, the edges of the diaphragm 2 are sealed and connected to the side walls of the groove. When the air cavity is inflated, the diaphragm 2 as a whole bulges toward the support platform 3. In this way, only one side of the air cavity facing the support platform 3 is the diaphragm 2. When inflated, the diaphragm 2 will not be offset due to the limiting effect of the side walls of the groove, and can be accurately pressed on the battery cell 5. In addition, Figure 3 As shown, the airbag 7 is located in the groove. During the inflation process of the airbag 7, the side walls around the groove limit the airbag 7 to prevent the airbag 7 from shifting in position.

[0055] In another embodiment, a sealing gasket 4 is provided on the bottom wall of the housing 1 facing the platform 3, so that the platform 3 and the housing 1 can be sealed by the sealing gasket 4, and the sealing gasket 4 has a certain buffering effect. When the housing 1 and the platform 3 are against each other, the sealing gasket 4 can prevent the housing 1 from bumping and damaging the platform 3. Figure 1 As shown, the edge of the diaphragm 2 can be fixed between the sealing gasket 4 and the bottom wall of the housing 1 to fix the edge of the diaphragm 2 and the sealing gasket 4 to the housing 1 at the same time.

[0056] The sealing pad 4 can be a rubber pad and / or a silicone pad, which is low in cost and easy to manufacture. In addition, the thickness of the sealing pad 4 is 0.1 mm-10 mm, so as to ensure the cushioning performance and sealing effect of the sealing pad while preventing the waste of the material of the sealing pad 4. Exemplarily, the thickness of the sealing pad 4 is 0.1 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.

[0057] The housing 1 may be provided with air holes 1a, which are connected to the inside of the air cavity or the inside of the airbag 7, so that air can be directly inflated into the air holes 1a of the housing 1 during inflation, which is more convenient for inflation. Specifically, the air holes 1a may be provided on the top wall or the side wall of the housing 1, and the number of the air holes 1a may be one or more, which may be set according to actual conditions. Of course, the solution in which the air holes 1a are provided on the diaphragm 2 or the airbag 7 is also within the protection scope of the present utility model.

[0058] In addition, the support platform 3 is provided with an exhaust hole 3a, and the opening of the exhaust hole 3a is located in an area outside the first area of ​​the support surface, so that when the diaphragm 2 or the airbag 7 is bulging, the air in the housing 1 can be discharged through the exhaust hole 3a to ensure that the diaphragm 2 or the airbag 7 can be bulged to compress the battery cell 5. In addition, the opening of the exhaust hole 3a is located in an area that can be covered by the diaphragm 2 or the airbag 7, such as Figure 2 As shown, the negative pressure formed on the surface of the support platform 3 by using the exhaust holes 3a can adsorb the diaphragm 2 or the airbag 7, so that the diaphragm 2 or the airbag 7 can keep pressing the battery cell 5 while making the pressure distribution of the diaphragm 2 or the airbag 7 more uniform.

[0059] Alternatively, the opening of the exhaust hole 3a is located in the first area of ​​the bearing surface and corresponds to the hollow area of ​​the mask plate 6. In this way, the exhaust hole 3a can be used to form a negative pressure in the hollow area of ​​the mask plate 6. The battery cell 5 presses the mask plate 6 under the action of the diaphragm 2 or the airbag 7 and the negative pressure, so that the battery cell 5 and the mask plate 6 are more closely attached, further improving the quality of the film. In addition, due to the flatness difference of the table surface of the bearing platform 3 and the slight deformation of the mask plate 6 material, after the battery cell 5 and the mask plate 6 are attached, there may be a large number of tiny gaps between the bearing platform 3 and the mask plate 6. After the negative pressure is formed in the hollow area of ​​the mask plate 6, the air in the tiny gaps between the bearing platform 3 and the mask plate 6 can be discharged from the hollow area, so that the battery cell 5 and the mask plate 6 are more flat and the attachment accuracy is higher.

[0060] like Figure 4 As shown, the flexible member includes a flexible film 8. The driving assembly includes a first driving member, a plurality of guide members 9 and a plurality of tensioning members 10, wherein the flexible film 8 moves along the plurality of guide members 9 and the movable tensioning member 10. Two tensioning members 10 are located between adjacent guide members 9, that is, the flexible film 8 between the two guide members 9 passes through the two tensioning members 10, and the two tensioning members 10 can flatten and tighten the flexible film 8 passing between the two tensioning members 10. The two tensioning members 10 can be arranged closer to the supporting platform 3 than the guide members 9. Specifically, the two tensioning members 10 are arranged lower than the guide members 9, so that the flexible film 8 between the two tensioning members 10 is flattened by tension.

[0061] The first driving member can drive the tensioning member 10 to approach or move away from the carrier 3. Specifically, when the first driving member drives the tensioning member 10 to approach the carrier 3, the flexible film 8 between the two tensioning members 10 gradually approaches the battery cell 5 and can press the battery cell 5, so that the battery cell 5 is more closely attached to the mask 6 through the pressing effect of the flexible film 8. In this embodiment, the first driving member can drive the tensioning member 10 to move below the carrying surface to ensure that the flexible film 8 covers the battery cell 5 and can apply sufficient pressure to the battery cell 5. In addition, the negative pressure formed on the surface of the carrier 3 by the exhaust hole 3a can adsorb the flexible film 8, so that the flexible film 8 has sufficient pressure on the battery cell 5.

[0062] Specifically, the tensioning member 10 may include a support plate and two groups of rollers 10a disposed on the support plate, the flexible film 8 passes between the two groups of rollers 10a, the flexible film 8 moves along the rollers 10a, and the flexible film 8 is flattened and tensioned under the support of the rollers 10a. Each group of rollers 10a includes two opposite rollers 10a, and the flexible film 8 passes through the two opposite groups of rollers 10a to prevent the flexible film 8 from detaching from the rollers 10a. Alternatively, the tensioning member 10 may also include a support plate and a clamping member disposed on the support plate, the clamping member can clamp the flexible film 8, the clamping member can clamp the flexible film 8 and move close to the supporting platform 3 together with the support plate, so that the flexible film 8 presses the battery cell 5.

[0063] In addition, the guide member 9 may be a guide wheel, which can change the transmission direction of the flexible belt and has low friction.

[0064] As a possible implementation, the material of the diaphragm 2, the airbag 7 or the flexible membrane 8 is polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polyimide (PI), polyolefin copolymer (polyolefin, PO), polyvinyl chloride (Polyvinyl chloride, PVC) and / or rubber. The above materials have specific elasticity, good mechanical properties, and good corrosion resistance, and are suitable for use as the diaphragm 2, the airbag 7 or the flexible membrane 8.

[0065] In addition, the thickness of the diaphragm 2, the airbag 7 or the flexible film 8 is 12 μm-500 μm, so as to prevent material waste while ensuring the mechanical properties of the diaphragm 2, the airbag 7 or the flexible film 8. Exemplarily, the thickness of the diaphragm 2, the airbag 7 or the flexible film 8 is 12 μm, 50 μm, 100 μm, 150 μm, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 450 μm or 500 μm.

[0066] In another preferred embodiment, the film laminating device further includes a pressing plate 11, and the flexible member includes a flexible layer fixed to the bottom wall of the pressing plate 11, and the flexible layer and the bottom wall of the pressing plate 11 can be bonded, clamped or fixedly connected by screws. The driving component is used to drive the pressing plate 11 to move closer to or away from the supporting platform 3. Specifically, after the battery cell 5 is laminated with the mask 6 on the supporting platform 3, the driving component drives the pressing plate 11 and the flexible layer to move and gradually approach the supporting platform 3 until the flexible layer presses the battery cell 5, so that the flexible layer presses the battery cell 5 evenly, so that the battery cell 5 and the mask 6 are more tightly laminated.

[0067] The flexible layer includes a silicone layer, a rubber layer and / or an elastic airbag 7. When the flexible layer presses the battery cell 5, the thickness of the flexible layer itself is reduced by 0.1 mm-0.5 mm to prevent the battery cell 5 from being damaged by excessive pressure of the flexible layer. Specifically, the thickness of the flexible layer itself is reduced by 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm.

[0068] The thickness of the flexible layer can be 1 mm-15 mm, so as to ensure the buffering performance of the flexible layer while preventing the waste of the flexible layer material. Exemplarily, the thickness of the flexible layer can be 1 mm, 3 mm, 5 mm, 8 mm, 10 mm, 12 mm, 14 mm or 15 mm.

[0069] like Figure 6-Figure 8 As shown, the pressing plate 11 includes a ventilation mechanism, and the ventilation mechanism has a plurality of first air ports and a second air port that are connected, and the plurality of first air ports are located on the surface of the flexible layer. The plurality of second air ports can be located on the upper surface of the pressing plate 11. The film pasting device also includes an air pump connected to the second air port of the ventilation mechanism, and the air pump evacuates air to form a negative pressure at the first air port, or the air pump blows air to form a positive pressure at the first air port. In this embodiment, the pressing plate 11 can also be used to adsorb the battery cell 5, that is, after the mask 6 is placed on the carrier 3, the air pump is used to evacuate air, and a negative pressure is formed at the first air port to adsorb the battery cell 5. The driving device drives the pressing plate 11 and the battery cell 5 to move and place the battery cell 5 on the mask 6, and then the air pump blows air to form a positive pressure at the first air port, and the plurality of first air ports blow air to the battery cell 5 to make the battery cell 5 and the mask 6 fit more closely.

[0070] In the above embodiment, the plurality of first air ports may be evenly distributed on the surface of the flexible layer, and may be distributed in an array, so that the air pressure on the battery cell 5 is evenly distributed.

[0071] It should be noted that the film laminating device is not only suitable for laminating the battery cell 5 with the mask, but also suitable for any other workpiece that requires film laminating.

[0072] In the above-mentioned embodiments, the first area of ​​the carrier 3 may include a first partition and a second partition, the second partition surrounds the first partition, wherein the adsorption port of the first set of adsorption mechanisms is located in the first partition, and the adsorption port of the second set of adsorption mechanisms is located in the second partition. The first partition corresponds to the hollow area of ​​the mask 6, and the second partition corresponds to the non-hollow area of ​​the mask 6, so that the adsorption port of the adsorption mechanism 3b located in the first partition can suck the air in the hollow area to maintain negative pressure in the hollow area, thereby making the battery cell 5 and the mask 6 fit more closely and improving the quality of film pasting. The adsorption port of the adsorption mechanism 3b located in the second partition can adsorb the mask 6 to fix the mask 6.

[0073] Two sets of independent adsorption mechanisms 3b are arranged in the carrier 3. The two sets of adsorption mechanisms 3b can be controlled to be opened or closed separately, that is, one set of adsorption mechanisms 3b can be opened or closed separately, and the other set of adsorption mechanisms 3b can also be opened or closed separately, and the two sets of adsorption mechanisms 3b do not affect each other. In the process of bonding the battery cell 5, the second set of adsorption mechanisms can be opened and the first set of adsorption mechanisms can be closed to prevent the first set of adsorption mechanisms from affecting the positioning of the battery cell 5 and the mask 6. After the battery cell 5 is bonded to the mask 6, the first set of adsorption mechanisms is turned on again to form a negative pressure in the hollow area. The working states of the two sets of adsorption mechanisms 3b do not affect each other. In the process of bonding the mask 6 and the battery cell 5, the working states of the two sets of adsorption mechanisms 3b can be adjusted according to actual conditions. Specifically, the adsorption mechanism 3b includes a gas channel opened inside the carrier 3.

[0074] The embodiment of the present application also provides a photovoltaic cell manufacturing device, which includes a cell film attaching device as provided in any of the above embodiments. Compared with the prior art, the photovoltaic cell manufacturing device provided in the embodiment of the present application has the same beneficial effects as the above cell film attaching device, which will not be described in detail here.

[0075] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0076] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A film attaching device for a battery cell, characterized in that: include: A carrying platform, the carrying platform comprising an adsorption mechanism, the adsorption port of the adsorption mechanism is located on a carrying surface of the carrying platform, and the carrying surface has a first area for carrying a mask; A flexible member and a driving assembly, wherein the area of ​​the flexible member is larger than the area of ​​the first region or the edge of the flexible member exceeds the edge of the first region by a distance of 5 mm to 500 mm; The driving assembly is used to drive the entire or a part of the flexible member to bulge toward the bearing platform through the action of air pressure, or the driving assembly is used to drive the entire or a part of the flexible member to move toward the bearing platform.

2. The film attaching device for a battery cell according to claim 1, characterized in that: The flexible member includes a diaphragm; The film sticking device also includes a shell, the diaphragm is sealedly connected to the shell, and the diaphragm and the shell together form an air cavity.

3. The film attaching device for a battery cell according to claim 1, characterized in that: The flexible member includes an air bag; The film sticking device also includes a shell, and the airbag is connected to the shell.

4. The film attaching device for a battery cell according to claim 1, characterized in that: The flexible member includes a diaphragm; the film sticking device also includes a shell, the diaphragm is sealed and connected to the shell; a groove is provided on the side of the shell facing the supporting platform; the diaphragm and the inner wall of the groove together form an air cavity; or, The flexible member includes an airbag; the film sticking device also includes a shell, and a groove is provided on a side of the shell facing the supporting platform; the airbag is located in the groove.

5. The film attaching device for a battery cell according to claim 4, characterized in that: A sealing gasket is arranged on the bottom wall of the shell facing the supporting platform.

6. The film attaching device for a battery cell according to claim 1, characterized in that: The flexible member includes a diaphragm; the film sticking device also includes a shell, the diaphragm is sealed and connected to the shell, and the diaphragm and the shell together form an air cavity; the shell is provided with an air hole, and the air hole is connected to the inside of the air cavity; or, The flexible member includes an airbag; the film sticking device also includes a shell, the airbag is connected to the shell; the shell is provided with an air hole, and the air hole is connected to the inside of the airbag; or, The flexible member includes a diaphragm; the film sticking device also includes a shell, the diaphragm is sealed and connected to the shell, and the diaphragm and the shell together form an air cavity; the support platform is provided with an exhaust hole, and the opening of the exhaust hole is located in an area outside the first area of ​​the support surface and in an area that can be covered by the diaphragm; or, The flexible member includes an airbag; the film sticking device also includes a shell, the airbag is connected to the shell; the support platform is provided with an exhaust hole, the opening of the exhaust hole is located in an area outside the first area of ​​the support surface and in an area that can be covered by the airbag; or, The carrying platform is provided with an exhaust hole, and the opening of the exhaust hole is located in the first area of ​​the carrying surface and corresponds to the hollow area of ​​the mask.

7. The film attaching device for a battery cell according to claim 1, characterized in that: The flexible member includes a flexible film, and the driving assembly includes a plurality of guide members, a plurality of tensioning members and a first driving member, wherein two tensioning members are located between adjacent guide members, and the two tensioning members can flatten and tighten the flexible film passing between the two tensioning members, and the first driving member can drive the tensioning members to approach or move away from the supporting platform.

8. The film attaching device for a battery cell according to claim 7, characterized in that: The tensioning member includes a support plate and two groups of rollers arranged on the support plate, and the flexible membrane passes between the two groups of rollers; or, the tensioning member includes a support plate and a clamping member arranged on the support plate, and the clamping member can clamp the flexible membrane.

9. The film attaching device for a battery cell according to claim 1, characterized in that: The flexible member includes a diaphragm; the film sticking device also includes a shell, the diaphragm is sealed and connected to the shell, and the diaphragm and the shell together form an air cavity; the material of the diaphragm is polypropylene, polyethylene, polyethylene terephthalate, polyimide, polyolefin copolymer, polyvinyl chloride or rubber; the thickness of the diaphragm is 12μm-500μm; or, The flexible member includes an airbag; the film sticking device also includes a shell, and the airbag is connected to the shell; the material of the airbag is polypropylene, polyethylene, polyethylene terephthalate, polyimide, polyolefin copolymer, polyvinyl chloride or rubber; the thickness of the airbag is 12μm-500μm; or, The flexible member includes a flexible film, the driving assembly includes a plurality of guide members, a plurality of tensioning members and a first driving member, two tensioning members are located between adjacent guide members, the two tensioning members can flatten and tighten the flexible film passing between the two tensioning members, and the first driving member can drive the tensioning member to move closer to or away from the supporting platform; the material of the flexible film is polypropylene, polyethylene, polyethylene terephthalate, polyimide, polyolefin copolymer, polyvinyl chloride or rubber; the thickness of the flexible film is 12μm-500μm.

10. The film attaching device for a battery cell according to claim 1, characterized in that: It also includes a pressing plate, wherein the flexible member includes a flexible layer fixed to the bottom wall of the pressing plate; The driving assembly is used to drive the pressing plate to approach or move away from the supporting platform.

11. The film attaching device for a battery cell according to claim 10, characterized in that: The flexible layer includes a silicone layer, a rubber layer and / or an elastic airbag.

12. The film attaching device for a battery cell according to claim 10, characterized in that: The pressing plate includes a venting mechanism, the venting mechanism has a plurality of first air ports and second air ports that are connected, and the plurality of first air ports are located on the surface of the flexible layer; The film sticking device also includes an air pump connected to the second air port of the ventilation mechanism, and the air pump forms a negative pressure at the first air port when pumping air, or forms a positive pressure at the first air port when blowing air.

13. The film attaching device for a battery cell according to any one of claims 1-3, 7-8 and 10-12, characterized in that: The first area includes a first partition and a second partition, and the second partition surrounds the first partition; two sets of independent adsorption mechanisms are arranged in the support platform, wherein the adsorption port of the first set of adsorption mechanisms is located in the first partition, and the adsorption port of the second set of adsorption mechanisms is located in the second partition.

14. A photovoltaic cell manufacturing device, characterized in that: A film-attaching device for a battery cell comprising the battery cell described in any one of claims 1-13.

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