Embossing device

Abstract

The present application relates to an embossing device, comprising a roller, a heater, a rolling member and a heat insulating member; the heater is arranged in the roller, and the heater is coaxially arranged with the roller; at least one rolling member and at least one heat insulating member are provided on the roller, and the rolling member and the heat insulating member are arranged in sequence and spaced apart, thereby reducing the contact area between the rolling member and the film and preventing the film from adhering to the rolling member after melting; at the same time, a plurality of rolling members may be provided on the roller, which greatly improves the embossing efficiency of forming a plurality of avoidance portions on the film.

Description

Technical Field

[0001] The present invention relates to the technical field of solar photovoltaic components, in particular to an embossing device. Background Art

[0002] The cell strings in the new solar photovoltaic modules are formed by stacking cells (shingling or stack welding technology). The height of the stacked area of ​​the cells will be greater than the unstacked area. Before the film (adhesive film) reaches the melting temperature, the laminator is vacuumed and pressurized. Due to the height difference between the stacked area and the unstacked area of ​​the cells, the pressure is first applied to the stacked area during lamination, causing the stacked area to be easily damaged under the action of pressure, even causing the stacked area of ​​the cells to be squeezed and cracked.

[0003] In order to reduce the risk of hidden cracks in the battery cell stacking area due to compression, the position of the film corresponding to the battery cell stacking area needs to be embossed to form an avoidance portion to avoid the height of the battery cell stacking area that is higher than the non-stacked area, so as to reduce the compression pressure on the battery cell stacking area during lamination.

[0004] At present, the embossing process of the film is mainly carried out by a downward pressure forming device 10, which includes a forming strip 11, a heat insulation strip 12 and a supporting I-beam 13 connected in sequence. A heating pipe 14 is embedded in the heat insulation strip 12, and the heating pipe 14 heats the forming strip 11. Figure 1 The downward pressing molding device 10 is generally controlled by a cylinder to move up and down, thereby controlling the molding strip 11 to press down and contact the film to perform embossing.

[0005] However, with the above method, the contact area between the film forming strip 11 and the film is large, making it easy for the film to adhere to the forming strip 11 after melting, resulting in the film rising together with the forming strip 11 when the lower pressure forming device 10 is lifted. Summary of the Invention

[0006] In order to overcome the above-mentioned defects, the present application provides an embossing device, which is helpful in preventing the film from adhering to the embossing device after melting.

[0007] The embodiment of the present application provides an embossing device, comprising a roller, a heater, a rolling member, and a heat insulating member; the heater is disposed inside the roller, and the heater and the roller are coaxially arranged;

[0008] At least one rolling part and at least one heat insulating part are provided on the roller, and the rolling part and the heat insulating part are arranged in sequence and spaced apart.

[0009] Optionally, the rolling element and / or the heat insulating element are detachably mounted on the roller.

[0010] Optionally, the roller is a polygonal column structure;

[0011] The rolling member is provided with a polygonal opening along its axis which is matched with the rolling shaft.

[0012] Optionally, the roller is provided with a receiving cavity along its axis, and the heater is accommodated in the receiving cavity.

[0013] Optionally, the diameter of the circumscribed circle of the roller is 70 mm to 90 mm, and the diameter of the accommodating cavity is 10 mm to 20 mm.

[0014] Optionally, the rolling member is disc-shaped, and the outer diameter of the rolling member is 95 mm to 115 mm.

[0015] Optionally, the outer peripheral surface and / or side surface of the rolling element are further coated with an anti-stick coating, and the anti-stick coating is a polytetrafluoroethylene coating or a ceramic coating.

[0016] Optionally, the roller and / or the rolling member are made of any one of stainless steel, titanium or titanium alloy.

[0017] Optionally, the heat insulating member is in the shape of a circular tube, and a circular opening is provided along its axis to match the circumscribed circle of the roller; the outer diameter of the heat insulating member is 90 mm to 110 mm, and the diameter of the circular opening is 70 mm to 90 mm.

[0018] Optionally, the thermal insulation component is made of polytetrafluoroethylene.

[0019] Optionally, at least one axial end of the roller is further provided with a displacement adjustment member, and the displacement adjustment member is used to adjust the axial installation position of the rolling member along the roller.

[0020] Optionally, the displacement adjustment member includes a fixing plate, a fastener and an adjustment member;

[0021] The fixing plate is provided with a locking hole and an adjustment hole;

[0022] One end of the fastener passes through the locking hole and is connected to the roller, and one end of the adjusting member passes through the adjusting hole and abuts against the rolling member.

[0023] Compared with the existing technology, this technical solution has at least the following technical effects:

[0024] In an embossing device provided in an embodiment of the present application, at least one rolling part and at least one heat insulating part are provided on the roller, and the rolling part and the heat insulating part are arranged in sequence and spaced apart. The roller drives the rolling part to rotate, so that the film reduces the contact area between the rolling part and the film, preventing the film from adhering to the rolling part after melting; at the same time, a plurality of rolling parts can be provided on the roller, so that a plurality of the avoidance parts can be rolled on the film, greatly improving the embossing efficiency of forming a plurality of the avoidance parts on the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and examples.

[0026] Figure 1 It is a structural schematic diagram of the lower pressure forming device in the prior art.

[0027] Figure 2 This is a schematic structural diagram of the embossing device provided in an embodiment of the present application.

[0028] Figure 3 A schematic diagram of the structural decomposition of the embossing device provided in an embodiment of the present application from one angle.

[0029] Figure 4 A schematic diagram of the structural decomposition of the embossing device provided in an embodiment of the present application from another angle.

[0030] Reference numerals:

[0031] 10. Downward pressure forming device;

[0032] 11. Molding strips; 12. Insulation strips; 13. Supporting I-beams; 14. Heating pipes;

[0033] 20. Embossing device;

[0034] 21. Roller; 211. Roller body; 212. Guide mounting portion; 213. Locking threaded hole; 22. Heater; 23. Rolling element; 231. Polygonal opening; 24. Heat insulation element; 241. Circular opening; 25. Displacement adjustment element; 251. Fixing plate; 252. Fastener; 253. Locking hole; 254. Adjustment hole;

[0035] 30. Film;

[0036] 31. Avoidance section; 32. Non-avoidance section. DETAILED DESCRIPTION

[0037] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0039] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "an", "the" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0040] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0041] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present invention are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0042] Existing solar photovoltaic modules mostly adopt a sandwich structure, and its structure from bottom to top is: glass, packaging material, solar cell string, packaging material and backboard. The backboard is equipped with a junction box to conduct the electricity generated by the solar photovoltaic module. At the same time, a frame is assembled around it to improve the mechanical strength of the solar photovoltaic module and facilitate installation.

[0043] A solar cell string is formed by connecting a certain number of cells in series or parallel. During the shingled or stacked solar module packaging process, the front and back sides of adjacent cells are first connected using conductive adhesive or solder ribbon. At least portions of the adjacent cells are stacked, making the stacked area taller than the unstacked area, creating a height difference in the solar cell string. Next, the glass, encapsulation material, and backsheet are stacked with the solar cell string. During this process, vacuuming, pressurizing, and heating are first performed to melt the encapsulation material. Once solidified, the glass and backsheet are then bonded to the front and back sides of the solar cell string.

[0044] However, before the packaging material melts, vacuum and pressurization are required, so that the glass, cover and packaging material move toward the direction close to the solar cell string. During the movement, due to the height difference between the stacked area and the unstacked area of ​​the cell, the pressure first acts on the stacked area during lamination, causing the stacked area to be easily damaged under the action of pressure, even causing the stacked area to be squeezed and cracked.

[0045] Therefore, the encapsulation material must be embossed in the area corresponding to the cell stacking region to form a relief. This allows for the height of the cell stacking region to be higher than the unstacked region, thereby reducing the pressure on the cell stacking region during lamination. The encapsulation material is typically a polymer film (adhesive film), typically ethylene-vinyl acetate copolymer (EVA) encapsulation film or ethylene-octene copolymer (POE) encapsulation film. The film is heated and melted to a certain degree, becoming a flowable and viscous liquid adhesive. After cooling and solidification, it adheres the backsheet and glass to the front and back sides of the solar cell string.

[0046] See Figure 2 The embodiment of the present application provides an embossing device 20, comprising a roller 21, a heater 22, a rolling member 23 and a heat insulating member 24. The heater 22 is disposed inside the roller 21, and the heater 22 and the roller 21 are coaxially arranged.

[0047] At least one rolling member 23 and at least one heat insulating member 24 are provided on the roller 21 , and the rolling member 23 and the heat insulating member 24 are arranged in sequence and spaced apart.

[0048] Specifically, the heater 22 is coaxially arranged with the roller 21, allowing the heat generated by the heater 22 to be evenly transferred to the rolling element 23 along the radial direction of the roller 21. When the rolling element 23 is heated, the area where the film 30 contacts the rolling element 23 melts, forming a groove, i.e., the relief portion 31. Furthermore, because the heat generated by the heater 22 is evenly transferred, the roller 21 is less likely to bend after being heated, thus ensuring that the relief portion 31 is formed on the film 30 in the correct position corresponding to the cell stacking area.

[0049] In a specific embodiment, the roller 21 can be made of high-strength materials such as stainless steel, titanium, titanium alloy, etc. to meet the structural rigidity requirements of the roller 21. The roller 21 can be integrally formed, or formed by welding, casting, etc.

[0050] The heat insulating member 24 is spaced apart from the rolling member 23. The heat insulating member 24 can effectively delay the loss of heat generated by the heater 22, and can also effectively prevent the heat generated by the heater 22 from radiating to the non-avoidance portion 32 area on the film 30, thereby avoiding the non-avoidance portion 32 area from melting and softening after being heated, thereby ensuring that the depth of the avoidance portion 31 is relatively uniform.

[0051] See Figure 3 and Figure 4 The rolling member 23 and / or the heat insulating member 24 are detachably mounted on the roller 21. The rolling member 23 and / or the heat insulating member 24 can be individually and detachably mounted on the roller 21; or the rolling member 23 and / or the heat insulating member 24 can be integrally formed and connected as a whole, and then detachably mounted on the roller 21 in combination, thereby improving the assembly efficiency of the embossing device 20.

[0052] Specifically, according to the number of battery cell stacking areas and the spacing between two adjacent battery cell stacking areas, the number of avoidance portions 31 that need to be formed on the film 30 and the spacing between two adjacent avoidance portions 31 are determined, and then the number of rolling parts 23 to be installed on the roller 21 and the axial width of the thermal insulation part 24 along the roller 21 are determined, and the thermal insulation part 24 is correspondingly arranged between two adjacent rolling parts 23. For example, in this embodiment, the number of rolling parts 23 and thermal insulation parts 24 are both 6. In other embodiments, the number of rolling parts 23 and thermal insulation parts 24 can also be 1, 2, 3, 4, 5, 7, 8, etc. The number of rolling parts 23 and thermal insulation parts 24 can be the same or different, and is not limited here.

[0053] It is understood that the rolling member 23 and / or the heat insulating member 24 can also be fixedly disposed on the roller 21. The rolling member 23 and / or the heat insulating member 24 can be directly fixed to the roller 21 via a fixing member; or the rolling member 23 and / or the heat insulating member 24 can be integrally formed and connected to the roller 21.

[0054] Furthermore, the roller 21 is provided with a receiving cavity (not shown in the figure) along its axis, and the heater 22 is accommodated in the receiving cavity, so that the heater 22 and the roller 21 are coaxially arranged.

[0055] Specifically, the heater 22 can be an electric heating tube or an electric heating rod. The heater 22 is coaxially arranged with the roller 21. One heater 22 can be used to heat all the rolling parts 23 mounted on the roller 21, reducing the number of heaters 22 required to be set and reducing energy consumption.

[0056] It is understandable that the heater 22 can be fixedly housed in the accommodating cavity, which is beneficial to its heating efficiency; in another embodiment, the heater 22 can also be detachably housed in the accommodating cavity, which facilitates the replacement of the heater 22 when the heater 22 is damaged.

[0057] Furthermore, the roller 21 is a polygonal column structure; the rolling member 23 is provided with a polygonal opening 231 along its axis that is adapted to the roller 21 .

[0058] Specifically, since the polygonal opening 231 on the rolling member 23 is compatible with the polygonal column structure of the roller 21, after the rolling member 23 is mounted on the roller 21, the rolling member 23 will not rotate relative to the roller 21 after being subjected to force, thereby ensuring the assembly stability of the rolling member 23 and the roller 21, and avoiding the problem of uneven depth of the avoidance portion 31 formed due to the force after the rolling member 23 rotates when pressed down to contact the film 30.

[0059] In this embodiment, the roller 21 has a hexagonal column structure, and the rolling member 23 has a hexagonal opening along its axis that matches the roller 21. The roller 21 can also have an octagonal column structure or other polygonal column structure, which is not limited here.

[0060] The diameter of the circumscribed circle of roller 21 can be set according to actual needs. For example, the diameter of the circumscribed circle of roller 21 is 70 mm to 90 mm. Specifically, the diameter of the circumscribed circle of roller 21 can be 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, etc., without limitation. In this embodiment, the diameter of the circumscribed circle of roller 21 is 80 mm.

[0061] The diameter of the accommodating cavity can be determined according to the size of the heater 22. For example, the diameter of the accommodating cavity is 10 mm to 20 mm. Specifically, the diameter of the accommodating cavity can be 10 mm, 12 mm, 14 mm, 15 mm, 16 mm, 18 mm, 20 mm, etc., without limitation. In this embodiment, the diameter of the accommodating cavity is 16 mm.

[0062] Furthermore, an anti-stick coating is applied to the outer peripheral surface and / or side surface of the rolling member 23 that contacts the film 30 to prevent the film 30 from sticking to the rolling member 23 after melting and softening. The anti-stick coating can be a polytetrafluoroethylene (Teflon) coating, a ceramic coating, or other anti-stick coating that can prevent the film 30 from sticking to the rolling member 23 after melting.

[0063] Specifically, the rolling member 23 can be made of a high-strength material such as stainless steel, titanium, or a titanium alloy. The rolling member 23 can be integrally formed or formed by welding, casting, or other processes. The rolling member 23 can be disc-shaped, which reduces the contact area between the rolling member 23 and the film 30, preventing the film 30 from adhering to the rolling member 23 after melting, and further ensuring that the depth of the relief portion 31 formed on the film 30 is relatively uniform.

[0064] The dimensions of the rolling element 23 can be determined based on the dimensions of the roller 21 and actual requirements. The outer diameter of the rolling element 23 should be greater than the diameter of the circumscribed circle of the roller 21. For example, the outer diameter of the rolling element 23 is between 95 mm and 115 mm. Specifically, the outer diameter of the rolling element 23 can be 95 mm, 100 mm, 105 mm, 110 mm, 115 mm, etc., without limitation. In this embodiment, the outer diameter of the rolling element 23 is 105 mm.

[0065] In addition, since the rolling part 23 can be disc-shaped, heat can be evenly transferred to the rolling part 23, effectively avoiding the bending deformation of the rolling part 23 after being heated. It can also make the temperature of each point on the outer peripheral side of the rolling part 23 the same. When the outer peripheral side of the rolling part 23 contacts the film 30, it ensures that the depth of the avoidance portion 31 formed on the film 30 is relatively uniform.

[0066] Furthermore, the thermal insulation member 24 can be prefabricated into several different lengths. By replacing the thermal insulation member 24 of different lengths and placing the thermal insulation member 24 between two adjacent rolling members 23, the distance between the two adjacent rolling members 23 can be adjusted to meet the need of forming avoidance portions 31 with different distances on the film 30.

[0067] Specifically, the thermal insulation member 24 can be made of a thermal insulation material such as polytetrafluoroethylene (Teflon). The thermal insulation member 24 can be in the shape of a circular tube, with a circular opening 241 along its axis that matches the circumscribed circle of the roller 21. After the thermal insulation member 24 is placed on the roller 21, the inner wall of the circular opening 241 contacts the polygonal edge of the roller 21, reducing the contact area between the thermal insulation member 24 and the roller 21, thereby effectively reducing the amount of heat transferred to the thermal insulation member 24 through the roller 21 and reducing heat loss. In addition, a sealed thermal insulation space can be formed between the side walls of the rolling member 23, the inner wall of the circular opening 241, and the side walls of the roller 21, allowing static air to exist within the thermal insulation space. Since air has a low thermal conductivity and the heat conduction of static air is relatively slow, it can be used for thermal insulation, further reducing heat loss and lowering the energy consumption of the heater 22. It also prevents heat from radiating to the non-avoidance portion 32 of the film 30.

[0068] The outer diameter of the thermal insulator 24 can be set based on the outer diameter of the rolling element 23 and actual needs. The outer diameter of the thermal insulator 24 should be smaller than the outer diameter of the rolling element 23 and larger than the diameter of the circumscribed circle of the roller 21. For example, the outer diameter of the thermal insulator 24 can be 90 mm to 110 mm. Specifically, the outer diameter of the thermal insulator 24 can be 90 mm, 95 mm, 100 mm, 105 mm, 110 mm, etc., without limitation. In this embodiment, the outer diameter of the thermal insulator 24 is 100 mm.

[0069] The diameter of circular opening 241 matches the diameter of the circumscribed circle of roller 21. The diameter of circular opening 241 can be equal to the diameter of the circumscribed circle of roller 21, meaning the diameter of circular opening 241 can be between 70 mm and 90 mm. Specifically, the diameter of circular opening 241 can be 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, etc., without limitation. The diameter of circular opening 241 can also be slightly larger than the diameter of the outer circle of roller 21. In this embodiment, the diameter of circular opening 241 is 80 mm, without limitation.

[0070] Furthermore, a displacement adjustment member 25 is provided at at least one axial end of the roller 21 . The displacement adjustment member 25 is used to adjust the axial installation position of the rolling member 23 along the roller 21 .

[0071] Specifically, when there is a certain deviation between the installation position of the rolling member 23 on the roller 21 and the position where the avoidance portion 31 needs to be formed on the film 30, the installation position of the rolling member 23 along the axial direction of the roller 21 can be adjusted by the displacement adjustment member 25.

[0072] Furthermore, the displacement adjustment member 25 includes a fixed disk 251, a fastener 252, and an adjustment member (not shown). The fixed disk 251 is fixed to at least one axial end of the roller 21 via the fastener 252. The adjustment member is movably mounted on the fixed disk 251 and can be used to adjust the axial installation position of the rolling member 23 along the roller 21 so that the rolling member 23 and the avoidance portion 31 on the film 30 always correspond to each other.

[0073] Specifically, a locking hole 253 and an adjusting hole 254 are provided on the fixing plate 251 ; one end of the fastener 252 passes through the locking hole 253 and is connected to the roller 21 , and one end of the adjusting member passes through the adjusting hole 254 and abuts against the rolling member 23 .

[0074] In this embodiment, the fastener 252 can be a set screw, and the adjuster can be an adjustment screw. The locking hole 253 is a through hole, and the adjustment hole 254 is a threaded hole. A threaded locking hole 213 is provided on the sidewall of at least one axial end of the roller 21, opposite the locking hole 253 on the fixing plate 251. The fastener 252 passes through the locking hole 253 and is locked into the locking threaded hole 213, thereby securing the fixing plate 251 to at least one axial end of the roller 21.

[0075] The adjusting member is locked in the adjusting hole 254 , and one end of the adjusting member passing through the adjusting hole 254 abuts against the rolling member 23 .

[0076] Specifically, the distance between the center of the adjustment hole 254 and the center of the fixed plate 251 is greater than the distance between the center of the locking hole 253 and the center of the fixed plate 251. This allows the adjustment member to be locked in the adjustment hole 254, so that the end of the adjustment member that passes through the adjustment hole 254 can abut against the side wall of the rolling member 23. Therefore, by adjusting the depth of the adjustment member locked in the adjustment hole 254, the adjustment member can push the rolling member 23 and the heat insulating member 24 to move axially along the roller 21, thereby adjusting the axial installation position of the rolling member 23 along the roller 21.

[0077] Furthermore, the roller 21 includes a roller body 211 and a guide mounting portion 212, the guide mounting portion 212 is connected to at least one axial end of the roller body 211, and the fixed plate 251 is provided with an opening along its axis that is compatible with the guide mounting portion 212, and the fixed plate 251 is sleeved on the guide mounting portion 212 through the opening.

[0078] Specifically, the outer diameter of the guide mounting portion 212 is smaller than the outer diameter of the roller body 211. Furthermore, a locking threaded hole 213 is provided on the sidewall of at least one axial end of the roller body 21, corresponding to the locking hole 253 on the fixing plate 251. The fastener 252 passes through the locking hole 253 and is locked in the locking threaded hole 213, thereby fixing the fixing plate 251 to at least one axial end of the roller body 21.

[0079] Furthermore, the guide mounting portion 212 may be a polygonal column structure, and the fixing plate 251 is provided with a polygonal opening 231 along its axis that matches the guide mounting portion 212 .

[0080] Specifically, since the polygonal opening 231 on the fixed plate 251 is compatible with the polygonal column structure of the guide mounting portion 212, after the fixed plate 251 is mounted on the guide mounting portion 212, the fixed plate 251 will not rotate relative to the guide mounting portion 212, thereby ensuring the assembly stability of the fixed plate 251 and the roller 21.

[0081] In this embodiment, the guide mounting portion 212 is a hexagonal column structure, and the fixed disk 251 is provided with a hexagonal opening along its axis that is compatible with the guide mounting portion 212. The guide mounting portion 212 can also be an octagonal column structure or other polygonal column structure, which is not limited here.

[0082] Furthermore, an elastic member can be connected to one end of the adjusting member close to the rolling member 23, so that the adjusting member is in flexible contact with the rolling member 23 when they are in contact, so as to avoid the adjusting member from directly and rigidly contacting the rolling member 23, causing the rolling member 23 to be squeezed and deformed, and further causing the formed avoidance portion 31 to not correspond to the stacking area of ​​the battery cell.

[0083] Furthermore, the embossing device 20 also includes a drive device for driving the roller 21 to move up and down, thereby driving the rolling element 23 to move up and down, controlling the contact state between the rolling element 23 and the film 30, and controlling the depth of the avoidance portion 31 formed by the contact between the rolling element 23 and the film 30 to match the desired depth. The drive device is also used to drive the roller 21 to move horizontally. Since the rolling element 23 is a circular pressure plate, when the drive device drives the roller 21 to move horizontally, the rolling element 23 can roll on the film 30. Specifically, the drive device can be at least one of a stepping motor, a cylinder, a servo motor, and the like.

[0084] Furthermore, the embossing device 20 also includes a cooling device, which is used to cool the avoidance portion 31. When the rolling member 23 contacts the film 30, the contact area between the two will melt and soften, and then be cooled and solidified by the cooling device, thereby forming the avoidance portion 31.

[0085] Specifically, the cooling device is located on the side opposite the roller 21 along its translational direction. The cooling device can cool and solidify the melted and softened area of ​​the film 30 after being pressed and contacted by the rolling element 23, thereby forming the escape portion 31. The cooling device can be fixed to the roller 21, detachably connected to the roller 21, or separately provided as two separate components from the roller 21. As long as the cooling device can cool and solidify the melted and softened area of ​​the film 30, no limitation is imposed herein. The cooling device also includes a fan assembly that can blow air to cool the area where the rolling element 23 and the film 30 are in contact.

[0086] When in use, first determine the number of avoidance portions 31 that need to be formed on the film 30 and the spacing between the two adjacent avoidance portions 31 based on the number of battery cell stacking areas and the spacing between two adjacent battery cell stacking areas, and then determine the number of rolling members 23 to be sleeved on the roller 21 and the axial width of the heat insulating member 24 along the roller 21; then sleeve the rolling member 23 and the heat insulating member 24 on the roller 21, and correspondingly set the heat insulating member 24 between the two adjacent rolling members 23, and then detachably set the displacement adjusting member 25 at at least one end of the axial direction of the roller 21 to fix the installation position of the rolling member 23 on the roller 21; when the installation position of the rolling member 23 on the roller 21 is When there is a deviation between the position where the avoidance portion 31 needs to be formed on the film 30, the axial installation position of the rolling member 23 along the roller 21 can also be adjusted by the displacement adjustment member 25; finally, the roller 21 is driven downward by the driving device, thereby driving the rolling member 23 to press down and contact the film 30, and the driving device further drives the roller 21 to translate, so that the rolling member 23 can roll on the film 30. Since the heater 22 can heat the rolling member 23, after the rolling member 23 presses down and contacts the film 30, the film 30 in the contact area between the two will melt and soften, and its thickness will be reduced, and an avoidance portion 31 will be formed along the rolling direction of the rolling member 23, thereby completing the embossing process of the film 30.

[0087] Compared to the prior art, the embossing device 20 provided in this application has at least one rolling element 23 and at least one thermal insulation element 24 disposed on a roller 21. The rolling elements 23 and thermal insulation elements 24 are arranged in a sequentially spaced arrangement. The roller 21 drives the rolling element 23 to rotate, reducing the contact area between the rolling element 23 and the film 30 and preventing the film 30 from adhering to the rolling element 23 after melting. Furthermore, the roller 21 can be provided with multiple rolling elements 23, thereby forming multiple escapes 31 on the film 30 through rolling, greatly improving the embossing efficiency of forming multiple escapes 31 on the film 30. Furthermore, the thermal insulation element 24 is disposed between two adjacent rolling elements 23, preventing the loss of heat generated by the heater 22 and preventing heat from radiating to areas of the film 30 other than the escapes 32. This ensures that the escapes 31 on the film 30 always correspond to the stacking area of ​​the battery cells and ensures that the escapes 31 are uniformly formed on the film 30.

[0088] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An embossing device, characterized in that: Including rollers, heaters, rolling parts and thermal insulation parts; The heater is arranged in the roller, and the heater and the roller are arranged coaxially; At least one rolling element and at least one heat insulating element are provided on the roller, and the rolling element and the heat insulating element are arranged in sequence and spaced apart; The roller is a polygonal column structure, the heat insulating member is a circular tube, and a circular opening is provided along its axis to match the circumscribed circle of the roller; an enclosed heat insulating space is provided between the side wall of the rolling member, the inner wall of the circular opening and the side wall of the roller.

2. The embossing device according to claim 1, characterized in that The rolling element and / or the heat insulating element are detachably sleeved on the roller.

3. The embossing device according to claim 1 or 2, characterized in that: The rolling member is provided with a polygonal opening along its axis which is matched with the rolling shaft.

4. The embossing device according to claim 3, characterized in that: The roller is provided with an accommodating cavity along its axis, and the heater is accommodated in the accommodating cavity.

5. The embossing device according to claim 4, characterized in that: The diameter of the circumscribed circle of the roller is 70 mm to 90 mm, and the diameter of the accommodating cavity is 10 mm to 20 mm.

6. The embossing device according to claim 3, characterized in that: The rolling part is disc-shaped, and the outer diameter of the rolling part is 95mm~115mm.

7. The embossing device according to claim 6, characterized in that: The outer peripheral surface and / or side surface of the rolling element are also coated with an anti-stick coating, and the anti-stick coating is a polytetrafluoroethylene coating or a ceramic coating.

8. The embossing device according to claim 3, characterized in that: The roller and / or the rolling member are made of any one of stainless steel, titanium or titanium alloy.

9. The embossing device according to claim 5, characterized in that: The outer diameter of the heat insulating member is 90 mm to 110 mm, the diameter of the circular opening is 70 mm to 90 mm, and the diameter of the circular opening is greater than or equal to the diameter of the circumscribed circle of the roller.

10. The embossing device according to claim 9, characterized in that: The thermal insulation component is made of polytetrafluoroethylene.

11. The embossing device according to claim 1 or 2, characterized in that: At least one axial end of the roller is further provided with a displacement adjusting member, and the displacement adjusting member is used to adjust the axial installation position of the rolling member along the roller.

12. The embossing device according to claim 11, characterized in that The displacement adjustment member includes a fixing plate, a fastener and an adjustment member; The fixing plate is provided with a locking hole and an adjustment hole; One end of the fastener passes through the locking hole and is connected to the roller, and one end of the adjusting member passes through the adjusting hole and abuts against the rolling member; One end of the adjusting member close to the rolling member is connected with an elastic member.

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