Battery sheet curing apparatus

Abstract

The application relates to the technical field of battery piece manufacturing, and particularly discloses a battery piece curing device. The battery piece curing device comprises a bearing device used for bearing a battery piece printed with conductive paste; a curing device used for pressing the battery piece and simultaneously heating the conductive paste on the battery piece; and a cooling device used for cooling the battery piece processed by the curing device. In the application, the curing device presses the battery piece to tightly contact with the conductive paste on the battery piece, so that the conductive paste is isolated from oxygen in the air, and the curing device directly heats the conductive paste while pressing the battery piece, thereby improving the sintering speed of the conductive paste, and the formed grid line can effectively avoid oxidation. After the conductive paste is cured, the grid line formed by curing is cooled, so that the grid line is prevented from reacting with oxygen in the air under high temperature, the appearance of the oxidation layer on the grid line is reduced, and the conductive performance of the grid line is further ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery piece manufacturing, and in particular to a battery piece curing device. BACKGROUND

[0002] In the manufacturing of battery pieces, conductive paste is printed on the battery pieces, and then the conductive paste is sintered and cured into grid lines. In the prior art, the conductive paste is mainly made of silver material, so that the grid lines formed by sintering have good conductive performance. However, silver material is expensive, and currently, in order to save production costs, there are also schemes in the industry to use other cheaper materials (such as copper) to make conductive paste. However, the conductive paste made of other materials has poorer conductive performance after sintering and curing than the conductive paste made of silver material, which affects the overall photoelectric conversion efficiency of the battery piece. SUMMARY

[0003] The present application provides a battery piece curing device, which aims to solve the problem of poor conductive performance of the conductive paste of the battery piece after sintering and curing in the prior art.

[0004] To achieve the above-mentioned purpose, the present application provides a battery piece curing device, which comprises:

[0005] A bearing device for bearing a battery piece printed with conductive paste;

[0006] A curing device for pressing the battery piece and simultaneously heating the conductive paste on the battery piece;

[0007] A cooling device for cooling the battery piece processed by the curing device.

[0008] As a further improvement of the present application, the curing device comprises a curing box located on one side of the bearing device in the height direction of the battery piece curing device, a lifting driving assembly for driving the curing box to move relative to the bearing device along the height direction of the battery piece curing device, the curing box has a pressing surface facing the bearing device, and a heating assembly is arranged inside the curing box, and the pressing surface is used to apply pressure to the conductive paste of the battery piece.

[0009] As a further improvement of the present application, the curing device further comprises a film pressing device, at least part of the length of the film pressing device is located between the pressing surface and the bearing device in the height direction of the battery piece curing device.

[0010] As a further improvement of the application, the curing box comprises a box body, a shell arranged at the periphery of the box body, the heating assembly is arranged in the box body, the pressing surface is located on the box body, the curing box further comprises a connecting block connected to the lifting driving assembly, the box body and the shell are movably connected to the connecting block along the height direction of the battery piece curing equipment, the shell is arranged closer to the bearing device than the box body, so that when the connecting block is driven by the lifting driving assembly to move towards the bearing device, the box body can also move towards the bearing device relative to the shell after the shell contacts the bearing device.

[0011] When the shell contacts the bearing device, the box body, the shell and the bearing device form an air chamber, and at least part of the length of the pressing film is located in the air chamber.

[0012] As a further improvement of the application, the shell and the box body form a cavity for filling protective gas, the cavity has a gas blowing port communicating inside and outside, and when the box body, the shell and the bearing device form the air chamber, the gas blowing port communicates with the air chamber.

[0013] As a further improvement of the application, the curing box further comprises a first elastic member arranged between the connecting block and the box body, and a second elastic member arranged between the connecting block and the shell.

[0014] As a further improvement of the application, the curing device further comprises a base fixed relative to the bearing device, a plurality of roller shafts rotatably connected to the base about their own axes, the plurality of roller shafts comprises a first roller shaft and a second roller shaft located on both sides of the curing box in the length direction of the battery piece curing equipment, and a third roller shaft and a fourth roller shaft located on the side away from the bearing device of the first roller shaft and the second roller shaft in the height direction of the battery piece curing equipment, the third roller shaft and the fourth roller shaft each have a part of the length of the pressing film wound thereon, and the part of the length of the pressing film extending from the third roller shaft to the fourth roller shaft contacts the outer circumferential surface of the first roller shaft and the outer circumferential surface of the second roller shaft.

[0015] As a further improvement of the application, the fourth roller shaft and the second roller shaft are arranged at intervals in the length direction of the battery piece curing equipment, the plurality of roller shafts further comprises a fifth roller shaft, the part of the length of the pressing film extending from the fourth roller shaft to the second roller shaft contacts the outer circumferential surface of the fifth roller shaft, and the fifth roller shaft is movably arranged relative to the base along the height direction of the battery piece curing equipment.

[0016] As a further improvement of the present application, the solidifying device further comprises a first driving member connected to the base and the first roller shaft, and a second driving member connected to the base and the second roller shaft, the first driving member is used to drive the first roller shaft to move relative to the bearing device along the height direction of the battery piece solidifying device, and the second driving member is used to drive the second roller shaft to move relative to the bearing device along the height direction of the battery piece solidifying device.

[0017] As a further improvement of the present application, the battery piece solidifying device comprises a first bearing device and a second bearing device, a first solidifying device and a first cooling device corresponding to the first bearing device, and a second solidifying device and a second cooling device corresponding to the second bearing device, and the battery piece solidifying device further comprises a conveying unit used to convey the battery piece to the first bearing device and the second bearing device.

[0018] As a further improvement of the present application, the cooling device comprises a fan used to blow air to the bearing device, and a blowing pipe used to blow protective gas to the bearing device.

[0019] As a further improvement of the present application, the bearing device is a conveying device used to convey the battery piece along the length direction of the battery piece solidifying device, and the cooling device is located behind the solidifying device along the conveying direction of the conveying device.

[0020] Advantages:

[0021] The battery piece solidifying device provided by the present application can press the battery piece by the solidifying device, so that the conductive paste on the battery piece can be in close contact with the solidifying device, and the conductive paste can be isolated from oxygen in the air. Meanwhile, the solidifying device can directly heat the conductive paste, so that the sintering speed of the conductive paste is improved, and the formed grid line can effectively avoid oxidation. The metal particles in the conductive paste can be fully contacted by applying pressure to the conductive paste during heating, so that the contact area and the bonding strength between the particles are enhanced, and the structure of the grid line formed by solidification is more dense and uniform. The grid line formed by solidification can be prevented from reacting with oxygen in the air at high temperature by cooling the conductive paste after solidification, so that the appearance of the oxidation layer on the grid line is reduced. The battery piece solidifying device provided by the present application can greatly improve the conductive performance of the grid line. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The battery piece solidifying device provided by the present application can press the battery piece by the solidifying device, so that the conductive paste on the battery piece can be in close contact with the solidifying device, and the conductive paste can be isolated from oxygen in the air. Meanwhile, the solidifying device can directly heat the conductive paste, so that the sintering speed of the conductive paste is improved, and the formed grid line can effectively avoid oxidation. The metal particles in the conductive paste can be fully contacted by applying pressure to the conductive paste during heating, so that the contact area and the bonding strength between the particles are enhanced, and the structure of the grid line formed by solidification is more dense and uniform. The grid line formed by solidification can be prevented from reacting with oxygen in the air at high temperature by cooling the conductive paste after solidification, so that the appearance of the oxidation layer on the grid line is reduced. The battery piece solidifying device provided by the present application can greatly improve the conductive performance of the grid line.

[0023] Figure 2 The battery piece solidifying device provided by the present application can press the battery piece by the solidifying device, so that the conductive paste on the battery piece can be in close contact with the solidifying device, and the conductive paste can be isolated from oxygen in the air. Meanwhile, the solidifying device can directly heat the conductive paste, so that the sintering speed of the conductive paste is improved, and the formed grid line can effectively avoid oxidation. The metal particles in the conductive paste can be fully contacted by applying pressure to the conductive paste during heating, so that the contact area and the bonding strength between the particles are enhanced, and the structure of the grid line formed by solidification is more dense and uniform. The grid line formed by solidification can be prevented from reacting with oxygen in the air at high temperature by cooling the conductive paste after solidification, so that the appearance of the oxidation layer on the grid line is reduced. The battery piece solidifying device provided by the present application can greatly improve the conductive performance of the grid line. Figure 1 The battery piece solidifying device provided by the present application can press the battery piece by the solidifying device, so that the conductive paste on the battery piece can be in close contact with the solidifying device, and the conductive paste can be isolated from oxygen in the air. Meanwhile, the solidifying device can directly heat the conductive paste, so that the sintering speed of the conductive paste is improved, and the formed grid line can effectively avoid oxidation. The metal particles in the conductive paste can be fully contacted by applying pressure to the conductive paste during heating, so that the contact area and the bonding strength between the particles are enhanced, and the structure of the grid line formed by solidification is more dense and uniform. The grid line formed by solidification can be prevented from reacting with oxygen in the air at high temperature by cooling the conductive paste after solidification, so that the appearance of the oxidation layer on the grid line is reduced. The battery piece solidifying device provided by the present application can greatly improve the conductive performance of the grid line.

[0024] Figure 3 for Figure 2 A three-dimensional structural diagram of the curing device in the diagram;

[0025] Figure 4 for Figure 2 A three-dimensional schematic diagram of the middle section structure;

[0026] Figure 5 for Figure 3 A three-dimensional schematic diagram of the middle section structure;

[0027] Figure 6 for Figure 2 A cross-sectional view of the curing device in the middle;

[0028] Figure 7 for Figure 2 Side view of the curing device in the middle;

[0029] Figure 8 A structural diagram showing the air chamber formed by the box, shell, and supporting device;

[0030] Figure 9 for Figure 5 A schematic diagram of the structure after removing the shell;

[0031] Figure 10 for Figure 9 A three-dimensional structural diagram of the blower component;

[0032] Figure 11 for Figure 7 A magnified diagram of point A in the middle;

[0033] Figure 12 This is a three-dimensional schematic diagram of a portion of the structure of the curing device in another embodiment of the present invention;

[0034] Figure 13 for Figure 12 Side view of the structure shown;

[0035] Figure 14 for Figure 13 A magnified diagram of point B in the middle;

[0036] Figure 15 for Figure 1 Top view of the conveyor unit;

[0037] Figure 16 for Figure 1 A bottom view of the intermediate cooling unit;

[0038] Figure 17 for Figure 16 Side view of the central air blowing tube;

[0039] Figure 18 for Figure 16A schematic view of a perspective structure of the blowing pipe.

[0040] In the drawings:

[0041] 100, a battery piece curing device;

[0042] 10, a bearing device; 10a, a first bearing device; 10b, a second bearing device;

[0043] 20, a curing device; 20a, a first curing device; 20b, a second curing device;

[0044] 21, a curing box; 211, a pressing surface; 212, an inner cavity; 213, a box body; 214, a shell; 215, a connecting block; 216, a cavity; 2161, a blowing port; 217, a first elastic member; 218, a second elastic member; 219, a heating assembly;

[0045] 22, a lifting driving assembly;

[0046] 23, an air chamber;

[0047] 24, a blowing member; 241, an interface;

[0048] 25, a sliding seat;

[0049] 26, a third elastic member;

[0050] 30, a cooling device; 30a, a first cooling device; 30b, a second cooling device; 31, a fan; 32, a blowing pipe; 321, a blowing hole; 33, a connecting frame;

[0051] 40, a material collecting device;

[0052] 50, a film pressing device; 51, a base; 521, a first roller shaft; 522, a second roller shaft; 523, a third roller shaft; 524, a fourth roller shaft; 525, a fifth roller shaft; 526, a sixth roller shaft; 53, a first driving member; 54, a second driving member.

[0053] 60, a conveying unit; 61, a first direction-changing conveying device; 62, a first conveying line; 63, a second conveying line; 631, a second direction-changing conveying device; 632, a first conveying section; 633, a second conveying section; 64, a third conveying line; 65, a buffer mechanism. DETAILED DESCRIPTION

[0054] The application will be described in detail below with reference to the embodiments shown in the drawings. However, the embodiments do not limit the application, and the changes made to the mechanisms, methods, or functions by those of ordinary skill in the art based on the embodiments are included in the protection scope of the application.

[0055] The terms such as "upper", "lower", "left", "right", "front", "back", etc. used herein to indicate spatial relative positions are for the purpose of facilitating illustration to describe the relationship of one feature relative to another feature as shown in the drawings. It can be understood that the terms of spatial relative positions can be intended to include different orientations other than the one shown in the drawings, and should not be construed as limiting the claims. In addition, the descriptive word "horizontal" used herein is not completely equivalent to along the direction perpendicular to the gravity direction, and a certain angle of inclination is allowed.

[0056] As shown in the drawings, Figures 1-4 An embodiment of the present application provides a battery piece curing device 100, which comprises a bearing device 10, a curing device 20 and a cooling device 30.

[0057] The bearing device 10 is used to bear the battery piece printed with conductive paste, i.e. after the battery piece is printed with conductive paste by a front-end device, the battery piece can be placed on the bearing device 10. The curing device 20 is used to press the battery piece and simultaneously heat the conductive paste on the battery piece, so as to cure the conductive paste to form a grid line. After the curing device 20 performs curing treatment on the grid line of the battery piece, the cooling device 30 can cool the battery piece to cool the cured grid line.

[0058] In the battery piece curing device 100 provided by the embodiment, the curing device 20 presses the battery piece to tightly contact the conductive paste on the battery piece, so as to isolate the conductive paste from oxygen in the air, and at the same time of pressing the battery piece, the curing device 20 directly heats the conductive paste, which improves the sintering speed of the conductive paste, so that the formed grid line can effectively avoid oxidation. At the same time of heating, the pressure is applied to the conductive paste, which can promote the full contact between the metal particles in the conductive paste, and enhance the contact area and bonding strength between the particles, so that the structure of the cured grid line is more dense and uniform. After the conductive paste is cured, the cooling is performed, which can prevent the cured grid line from reacting with oxygen in the air at high temperature, and reduce the appearance of the oxidation layer on the grid line. The battery piece curing device provided by the embodiment can greatly improve the conductive performance of the grid line.

[0059] In the embodiment, the conductive paste is at least made of copper, which has a low price and can reduce the production cost of the battery piece. Of course, in other embodiments, the material of the conductive paste is not limited to copper, and can be at least made of other metal materials.

[0060] It should be noted that, Figure 1The z-axis indicates the height direction of the battery piece curing device 100, the x-axis indicates the length direction of the battery piece curing device 100, and the y-axis indicates the width direction of the battery piece curing device 100. The height direction of the battery piece curing device 100 can also be understood as the up-down direction.

[0061] Continuing to combine Figures 5-8 As shown in the figure, the curing device 20 includes a curing box 21 and a lifting driving assembly 22. The curing box 21 is located on one side of the bearing device 10 in the height direction of the battery piece curing device 100, and the lifting driving assembly 22 is used to drive the curing box 21 to move relative to the bearing device 10 along the height direction of the battery piece curing device 100. The curing box 21 has a pressing surface 211 facing the bearing device 10, and a heating assembly 219 is arranged inside the curing box 21.

[0062] Specifically, an inner cavity 212 is formed in the curing box 21, and the heating assembly 219 is a plurality of electric heating wires or electric furnace wires arranged in the inner cavity 212. After the curing box 21 presses the battery piece, the plurality of electric heating wires or electric furnace wires are powered on, so that the curing box 21 can radiate heat outward, thereby heating the conductive paste.

[0063] When the battery piece is placed on the bearing device 10, the lifting driving assembly 22 drives the curing box 21 to move towards the bearing device 10, so that the pressing surface 211 can apply pressure to the conductive paste of the battery piece. In addition, since the heating assembly 219 is arranged inside the curing box 21, the curing box 21 can heat the conductive paste of the battery piece while applying pressure to the conductive paste of the battery piece, so that the conductive paste is sintered and cured.

[0064] After the conductive paste of the battery piece is cured by the curing box 21, the lifting driving assembly 22 drives the curing box 21 to move away from the bearing device 10, and then the battery piece can be cooled by the cooling device 30.

[0065] With the above design, the lifting driving assembly 22 drives the curing box 21 to move towards the bearing device 10, so that the pressing surface 211 of the curing box 21 can apply pressure to the conductive paste while the heat generated by the heating assembly 219 inside the curing box 21 can also be transmitted to the conductive paste through the pressing surface 211, thereby completing the action of applying pressure and heating the conductive paste at the same time. The structure of the curing device 20 is compact.

[0066] In this embodiment, the bearing device 10 is a conveying device that conveys the battery piece along the length direction of the battery piece curing device 100, that is, the bearing device 10 can convey the battery piece. In the conveying direction of the bearing device 10, the cooling device 30 is located behind the curing device 20. After receiving the battery piece printed with the conductive paste, the bearing device 10 first conveys the battery piece to below the curing box 21, then the conductive paste is cured by the curing box 21, and after the curing is completed, the bearing device 10 conveys the battery piece to below the cooling device 30, and the battery piece is cooled by the cooling device 30.

[0067] The bearing device 10 can automatically convey the battery piece to below the curing box 21 and below the cooling device 30, thereby improving the working efficiency of the battery piece curing device 100.

[0068] The battery piece curing device 100 can further include a receiving device 40 located behind the bearing device 10, and after the battery piece is cooled by the cooling device 30, the bearing device 10 conveys the battery piece to the receiving device 40. The receiving device 40 receives the battery piece so that the battery piece can then undergo other processes.

[0069] In an embodiment of the present application, the curing device 20 further includes a pressing film 50, and at least part of the length of the pressing film 50 is located between the bearing device 10 and the pressing surface 211 in the height direction. In this way, when the conductive paste of the battery piece is cured by the curing box 21, after the curing box 21 moves towards the bearing device 10, the pressing surface 211 will apply pressure to the conductive paste of the battery piece through the pressing film 50, the pressing film 50 covers the battery piece and tightly adheres to the battery piece. The pressing film 50 is preferably made of PI film or silicon oil paper.

[0070] The pressing film 50 can prevent the paste of the battery piece from adhering to the pressing surface 211 on the one hand, ensuring that the pressing surface 211 can be repeatedly used, and on the other hand, the pressing film 50 covers the battery piece, which can also isolate the conductive paste on the battery piece from oxygen, thereby preventing the conductive paste from being oxidized during curing.

[0071] The curing box 21 includes a box body 213, a shell 214 arranged on the periphery of the box body 213, a heating assembly 219 arranged in the box body 213, and a pressing surface 211 located on the box body 213. The curing box 21 further includes a connecting block 215 connected to the lifting driving assembly 22, and the lifting driving assembly 22 drives the box body 213 and the shell 214 to move by driving the connecting block 215. The box body 213 and the shell 214 are movably connected to the connecting block 215 in the height direction of the battery piece curing device 100, and the box body 213 and the shell 214 can move relative to each other in the height direction of the battery piece curing device 100.

[0072] The shell 214 is arranged closer to the bearing device 10 than the box 213. During the driving of the connecting block 215 by the lifting driving assembly 22 to move towards the bearing device 10, the shell 214 first contacts the bearing device 10, and then the box 213 can further move towards the bearing device 10 relative to the shell 214 until the pressing film 50 is pressed on the battery sheet on the bearing device 10.

[0073] When the shell 214 contacts the bearing device 10, the box 213, the shell 214 and the bearing device 10 form the air chamber 23, the battery sheet on the bearing device 10 is located in the air chamber 23, and at least part of the length of the pressing film 50 is located in the air chamber 23. As described above, after the shell 214 contacts the bearing device 10, the box 213 can further move towards the bearing device 10 relative to the shell 214 until the pressing film 50 is pressed on the battery sheet, and thus the height of the air chamber 23 decreases with the movement of the box 213 towards the bearing device 10. When the shell 214 contacts the bearing device 10 and the box 213 has not moved towards the bearing device 10 relative to the shell 214, protective gas can be introduced into the air chamber 23 to isolate the conductive paste of the battery sheet from oxygen, and then the shell 214 moves towards the bearing device 10 until the pressing film 50 is pressed on the battery sheet.

[0074] The air chamber 23 formed by the shell 214, the box 213 and the bearing device 10 is through in the length direction of the battery sheet curing device 100, so that the pressing film 50 can pass through the air chamber 23.

[0075] The shell 214 and the box 213 form a cavity 216. The cavity 216 is used to fill protective gas, and has a gas blowing port 2161 which is in communication with the inside and outside of the cavity 216. When the shell 214, the box 213 and the bearing device 10 form the air chamber 23, the gas blowing port 2161 is in communication with the air chamber 23.

[0076] It can be seen that after the protective gas is introduced into the cavity 216, the protective gas in the cavity 216 can flow into the air chamber 23 through the gas blowing port 2161, so as to isolate the conductive paste of the battery sheet in the air chamber 23 from oxygen. The cavity 216 is located outside the box 213, and also has the function of isolating the heat of the box 213.

[0077] In the embodiment, the gas blowing port 2161 is provided with two, the two gas blowing ports 2161 are arranged opposite in the width direction of the battery sheet curing device 100, and when the shell 214, the box 213 and the bearing device 10 form the air chamber 23, the two gas blowing ports 2161 are respectively located on both sides of the air chamber 23 in the width direction.

[0078] The protective gas is preferably nitrogen. In other embodiments of the present application, the protective gas can also be other gases not containing oxygen.

[0079] The curing box 21 also includes a first elastic member 217 disposed between the connecting block 215 and the box body 213, and a second elastic member 218 disposed between the connecting block 215 and the shell 214. The first elastic member 217 elastically abuts against the connecting block 215 and the box body 213 respectively along the height direction of the battery cell curing device 100, and the second elastic member 218 elastically abuts against the connecting block 215 and the shell 214 respectively along the height direction of the battery cell curing device 100.

[0080] During the movement of the lifting drive assembly 22 towards the support device 10, after the housing 214 contacts the support device 10, the connecting block 215 continues to move towards the support device 10 to compress the second elastic element 218. After the housing 213 presses the pressure film 50 onto the battery cell, the connecting block 215 can continue to move towards the support device 10 to compress the first elastic element 217. In this way, the housing 214 can make close contact with the support device 10, and the housing 213 can apply pressure to the conductive paste of the battery cell without damaging the battery cell.

[0081] Continue to combine Figures 9-10 As shown, to allow protective gas to be filled into the cavity 216, the cell curing equipment 100 also includes multiple air blowing elements 24. Parts of the air blowing elements 24 are located inside the cavity 216, and parts are located outside the cavity 216. The parts located outside the cavity 216 are provided with an interface 241 for connecting to the protective gas, and the parts located inside the cavity 216 are provided with vents. Figure 10 (Not shown in the image), the interface 241 and the vent are connected by a connecting channel located inside the air blowing component 24. The air blowing component 24 may have multiple vents, and the protective gas can enter the connecting channel through an air tube extending into the interface 241, and then enter the cavity 216 through multiple vents.

[0082] like Figure 3 , 7 As shown in Figure 11, the curing apparatus 20 also includes a base 51 fixedly disposed relative to the support device 10, and a plurality of rollers rotatably connected to the base 51 about their own axes. The plurality of rollers include a first roller 521 and a second roller 522 located on both sides of the curing chamber 21 in the length direction of the cell curing equipment 100, and a third roller 523 and a fourth roller 524 located on the side of the first roller 521 and the second roller 522 away from the support device 100 in the height direction of the cell curing equipment 100. A portion of the length of the pressure film 50 is wound on the third roller 523 and the fourth roller 524, and the portion of the pressure film 50 extending from the third roller 523 to the fourth roller 524 contacts the outer peripheral surface of the first roller 521 and the outer peripheral surface of the second roller 522.

[0083] With the above arrangement, when one of the first roller shaft 521, the second roller shaft 522, the third roller shaft 523 and the fourth roller shaft 524 rotates, the rest of the roller shafts also rotate through the pressing film 50, and one of the third roller shaft 523 and the fourth roller shaft 524 will "unwind" and the other will "wind up". The first roller shaft 521, the second roller shaft 522, the third roller shaft 523 and the fourth roller shaft 524 also support the pressing film 50 and keep the pressing film 50 in a preset shape.

[0084] The first roller shaft 521 and the second roller shaft 522 are respectively located at two sides of the curing box 21 in the length direction of the battery piece curing device 100, so that the part of the length of the pressing film 50 between the first roller shaft 521 and the second roller shaft 522 is located between the pressing surface 211 and the carrier device 10.

[0085] In the embodiment, after the conductive paste of the battery piece is cured in the curing box 21, the lifting driving assembly 22 drives the curing box 21 to move away from the carrier device 10. Then, one of the third roller shaft 523 and the fourth roller shaft 524 rotates, so that one of the third roller shaft 523 and the fourth roller shaft 524 "unwinds" and the other "winds up", so that the part of the length of the pressing film 50 originally located between the curing box 21 and the carrier device 10 moves away from the curing box 21 and the carrier device 10, and a new part of the length of the pressing film 50 enters between the curing box 21 and the carrier device 10.

[0086] The pressing surface 211 heats and applies pressure to the conductive paste of the battery piece through the pressing film 50, and some foreign matters may be adhered to the pressing film 50. Specifically, during the sintering process of the conductive paste, organic matters in the conductive paste may be left on the pressing film. With the above arrangement, each time the conductive paste of the battery piece is cured in the curing box 21, a new part of the length of the pressing film 50 enters between the curing box 21 and the carrier device 10, and the part of the length of the pressing film 50 adhered with foreign matters is not reused.

[0087] In the embodiment, the fourth roller shaft 524 and the second roller shaft 522 are arranged at intervals in the length direction of the battery piece curing device 100, so that the extension direction of the part of the length of the pressing film 50 extending from the fourth roller shaft 524 to the second roller shaft 522 is not parallel to the height direction of the battery piece curing device 100. The plurality of roller shafts further include a fifth roller shaft 525, the part of the length of the pressing film 50 extending from the fourth roller shaft 524 to the second roller shaft 522 contacts the outer circumferential surface of the fifth roller shaft 525, and the fifth roller shaft 525 is movably arranged along the height direction of the battery piece curing device 100 relative to the base 51.

[0088] The fifth roller shaft 525 moves along the height direction of the battery slice curing device 100 relative to the base 51 to tension the pressing film 50 extending from the fourth roller shaft 524 to the second roller shaft 522. When the lifting driving assembly 22 drives the curing box 21 to move towards the bearing device 10, the part of the pressing film 50 between the curing box 21 and the bearing device 10 is driven to move downwards by the curing box 21, and at the same time, the fifth roller shaft 525 moves along the height direction of the battery slice curing device 100 relative to the base 51 to release the tension of the pressing film 50, so that the pressing film 50 is prevented from being excessively stretched and damaged.

[0089] Further, the plurality of roller shafts further include a sixth roller shaft 526, the fourth roller shaft 524 and the sixth roller shaft 526 are arranged in the length direction of the battery slice curing device 100, and the fifth roller shaft 525 is located between the fourth roller shaft 524 and the sixth roller shaft 526, the part of the pressing film 50 extending from the fourth roller shaft 524 to the second roller shaft 522 has an outer side contacting the outer circumferential surface of the fifth roller shaft 525 and an inner side contacting the outer circumferential surface of the sixth roller shaft 526. The sixth roller shaft 526 is arranged so that when the fifth roller shaft 525 moves along the height direction of the battery slice curing device 100, the pressing film 50 can be more effectively tensioned.

[0090] Specifically, the curing device 20 further includes a sliding seat 25 and a third elastic member 26. The sliding seat 25 is slidingly connected to the base 51 along the height direction of the battery slice curing device 100, the fifth roller shaft 525 is connected to the base 51 through the sliding seat 25, and the third elastic member 26 is elastically stretched and contracted along the height direction of the battery slice curing device 100. One end of the third elastic member 26 is connected to the base 51, and the other end is connected to the sliding seat 25.

[0091] Under the action of the third elastic member 26, the sliding seat 25 and the fifth roller shaft 525 connected to the sliding seat 25 tend to move towards the bearing device 10, and when the part of the pressing film 50 between the curing box 21 and the bearing device 10 moves downwards, the sliding seat 25 and the fifth roller shaft 525 connected to the sliding seat 25 will move in the direction away from the bearing device 10 against the elastic force of the third elastic member 26, so that the pressing film 50 will not be excessively stretched and damaged. The third elastic member 26 is specifically a tension spring.

[0092] The curing device 20 further includes a first driving member 53 and a second driving member 54. The first roller shaft 521 is connected to the base 51 through the first driving member 53, and the first driving member 53 can drive the first roller shaft 521 to move along the height direction of the battery slice curing device 100 relative to the base 51. The second roller shaft 522 is connected to the base 51 through the second driving member 54, and the second driving member 54 can drive the second roller shaft 522 to move along the height direction of the battery slice curing device 100 relative to the base 51.

[0093] In the case that the fifth roller 525 is capable of moving along the height direction of the battery slice curing device 100 relative to the base 51, the first driving member 53 and the second driving member 54 drive the first roller 521 and the second roller 522 to move along the height direction of the battery slice curing device 100, so that the partial length of the pressing film 50 between the curing box 21 and the bearing device 10 is capable of moving along the height direction of the battery slice curing device 100. Before the curing box 21 presses the battery slice, the pressing film 50 moves towards the bearing device 10 to cover the battery slice, and after the curing box 21 completes the curing of the conductive paste, the curing box 21 moves upwards first, and then the pressing film 50 is lifted upwards.

[0094] In an embodiment of the present application, the following scheme can also be adopted: the partial length of the pressing film 50 between the curing box 21 and the bearing device 10 is a working section, and when the working section is lifted, one side of the working section in the width direction is lifted first, and then the other side of the working section in the width direction is lifted. After the one side of the working section in the width direction is lifted first, air can enter between the working section and the battery slice, and then the other side of the working section is lifted, so that the working section is completely lifted. Since the working section and the battery slice are in close contact, by adopting the above-mentioned manner, the working section can be prevented from lifting the battery slice from the bearing device 10.

[0095] In order to prevent the battery slice from being lifted by the working section, the bearing device 10 can also be provided with an adsorption structure for adsorbing the battery slice.

[0096] It can be conceived that, in the case that the pressing film 50 itself has sufficient elasticity, the fifth roller and the sixth roller are not required to be provided.

[0097] As shown in FIG. 1, Figures 12-14 In other embodiments of the present application, the following arrangement can also be adopted: the plurality of rollers include the first roller 521 and the second roller 522 respectively located on both sides of the curing box 21 in the length direction of the battery slice curing device 100, and at least one third roller 523 respectively located on the side away from the bearing device 10 of the first roller 521 and the second roller 522 in the height direction of the battery slice curing device 100, and the pressing film 50 is drivingly connected to the first roller 521, the second roller 522 and the at least one third roller 523.

[0098] The above-mentioned "the pressing film 50 is drivingly connected to the first roller 521, the second roller 522 and the at least one third roller 523" should be understood as: when at least one of the first roller 521, the second roller 522 and the third roller 523 rotates, the remaining rollers also rotate through the pressing film 50, and the first roller 521, the second roller 522 and the third roller 523 also simultaneously serve to support the pressing film 50, so that the pressing film 50 is maintained in a preset shape.

[0099] After the conductive paste of the battery piece is cured by the curing box 21, the lifting driving assembly 22 drives the curing box 21 to move away from the bearing device 10, and then the third roller 523 rotates to make the part of the length of the pressing film 50 originally between the curing box 21 and the bearing device 10 move away from the curing box 21 and the bearing device 10, and the new part of the length of the pressing film 50 enters between the curing box 21 and the bearing device 10.

[0100] The pressing surface 211 heats and applies pressure to the conductive paste of the battery piece through the pressing film 50, and the pressing film 50 can be adhered with some foreign matters. Specifically, during the sintering process of the conductive paste, the organic matters in the conductive paste can be adhered to the pressing film. With the above arrangement, each time the conductive paste of the battery piece is cured by the curing box 21, the new part of the length of the pressing film 50 enters between the curing box 21 and the bearing device 10, and the part of the length of the pressing film 50 adhered with the foreign matters is not reused.

[0101] The pressing film 50 is annular and has a length greater than that of the curing box 21, and can be recycled. In other embodiments of the present application, the battery piece curing device 100 can further be provided with a cleaning device for cleaning the pressing film 50.

[0102] It is conceivable that if the third roller 523 is provided with only one, the shape of the pressing film 50 is triangular. In the present embodiment, the third roller 523 is specifically provided with three, which are the roller 523a, the roller 523b and the roller 523c. Among them, the roller 523a and the roller 523b correspond to the first roller 521 and the second roller 522 in the height direction of the battery piece curing device 100, respectively, and the roller 523c is located between the roller 523a and the roller 523b. Moreover, the first roller 521, the second roller 522, the roller 523a and the roller 523b are located within the area surrounded by the pressing film 50 and contact the inner side of the pressing film 50, while the roller 523c is located outside the area surrounded by the pressing film 50 and contacts the outer side of the pressing film 50.

[0103] When the lifting driving assembly 22 drives the curing box 21 to move towards the bearing device 10, the part of the pressing film 50 between the curing box 21 and the bearing device 10 can be driven to move downwards by the curing box 21. In the present embodiment, at least one of the third rollers 523 is movably arranged along the height direction of the base 51 to prevent the part of the pressing film 50 between the curing box 21 and the bearing device 10 from being excessively stretched and damaged when moving downwards.

[0104] Specifically, the roller shaft 523c is movably arranged along the height direction of the battery slice curing device 100. The curing device 20 further comprises a sliding seat 25 and a third elastic member 26. The sliding seat 25 is slidingly connected to the base 51 along the height direction of the battery slice curing device 100, the roller shaft 523c is connected to the base 51 through the sliding seat 25, and the third elastic member 26 is connected to the base 51 at one end and to the sliding seat 25 at the other end.

[0105] Under the action of the third elastic member 26, the sliding seat 25 and the roller shaft 523c connected to the sliding seat 25 tend to move towards the carrying device 10. When the pressing film 50 between the curing box 21 and the carrying device 10 moves downward, the sliding seat 25 and the roller shaft 523c connected to the sliding seat 25 will overcome the elastic force of the third elastic member 26 and move in a direction away from the carrying device 10, so that the pressing film 50 will not be excessively stretched and damaged. The third elastic member 26 is specifically a tension spring.

[0106] In other embodiments of the present application, the movably arranged along the height direction of the battery slice curing device 100 can also be the roller shaft 523a or the roller shaft 523b.

[0107] It is conceivable that, in the case that the pressing film 50 itself has sufficient elasticity, it is not necessary to arrange at least one third roller shaft 523 to be movable relative to the base 51 along the height direction of the battery slice curing device 100.

[0108] As shown in FIGS. Figure 1 , 4 , 15, the battery slice curing device 100 comprises a first carrying device 10a and a second carrying device 10b, a first curing device 20a and a first cooling device 30a corresponding to the first carrying device 10a, and a second curing device 20b and a second cooling device 30b corresponding to the second carrying device 10b. The first curing device 20a is used to cure the conductive paste of the battery slice on the first carrying device 10a, and the first cooling device 30a is used to cool the battery slice on the first carrying device 10a. The second curing device 20b is used to cure the conductive paste of the battery slice on the second carrying device 10b, and the second cooling device 30b is used to cool the battery slice on the second carrying device 10b.

[0109] The carrying device 10, the curing device 20 and the cooling device 30 are each provided with two, so that the battery slice curing device 100 has sufficient capacity to process battery slices. The battery slice curing device 100 further comprises a conveying unit 60, which can convey the battery slices to the first carrying device 10a and the second carrying device 10b.

[0110] Specifically, the conveying unit 60 comprises a first direction-changing conveying device 61. After receiving the battery sheet, the first direction-changing conveying device 61 can output the received battery sheet in a first direction and a second direction. In the embodiment, the first direction is the length direction of the battery sheet curing device 100, and the second direction is the width direction of the battery sheet curing device 100.

[0111] When the battery sheet curing device 100 is working, the first direction-changing conveying device 61 first conveys the battery sheet in the first direction to the first bearing device 10a. It takes a certain time for the first curing device 20a to cure the conductive paste of the battery sheet on the first bearing device 10a. While the first curing device 20a is curing the conductive paste of the battery sheet on the first bearing device 10a, the first direction-changing conveying device 61 can output the battery sheet in the second direction to the second bearing device 10b.

[0112] It also takes a certain time for the second curing device 20b to cure the conductive paste of the battery sheet on the second bearing device 10b. While the second curing device 20b is curing the conductive paste of the battery sheet on the second bearing device 10b, the first direction-changing conveying device 61 can output the battery sheet in the first direction to the first bearing device 10a.

[0113] As can be seen, with the above arrangement, the first direction-changing conveying device 61 can send the battery sheet flowing to the second bearing device 10b while the first curing device 20a is curing the conductive paste of the battery sheet on the first bearing device 10a, and send the battery sheet flowing to the first bearing device 10a while the second curing device 20b is curing the conductive paste of the battery sheet on the second bearing device 10b. In this way, the first curing device 20a and the second curing device 20b can work fully, and the battery sheet curing device 100 has high working efficiency.

[0114] The battery sheet curing device 100 further comprises a first conveying line 62 arranged between the first direction-changing conveying device 61 and the first bearing device 10a. The battery sheet outputted by the first direction-changing conveying device 61 in the first direction is conveyed to the first bearing device 10a through the first conveying line 62.

[0115] The battery sheet curing device 100 further comprises a second conveying line 63 arranged between the first direction-changing conveying device 61 and the first bearing device 10a. The battery sheet outputted by the first direction-changing conveying device 61 in the second direction is conveyed to the second bearing device 10b through the second conveying line 63.

[0116] In the embodiment, the first bearing device 10a and the second bearing device 10b are arranged at intervals along the width direction of the battery piece curing device 100. The second conveying line 63 specifically includes a second direction-changing conveying device 631, a first conveying section 632, and a second conveying section 633. The first direction-changing conveying device 61 and the first bearing device 10a correspond to each other in the length direction of the battery piece curing device 100, the second direction-changing conveying device 631 and the second bearing device 10b correspond to each other in the length direction of the battery piece curing device 100, the first conveying section 632 is arranged between the first direction-changing conveying device 61 and the second direction-changing conveying device 631, and the second conveying section 633 is arranged between the second direction-changing conveying device 631 and the second bearing device 10b.

[0117] With the above arrangement, the battery piece outputted by the first direction-changing conveying device 61 along the second direction is first conveyed along the second direction through the first conveying section 632 to the second direction-changing conveying device 631, and then the second direction-changing conveying device 631 conveys the battery piece along the first direction to the second conveying section 633, and the second conveying section 633 conveys the battery piece to the second bearing device 10b.

[0118] The battery piece curing device 100 further includes a third conveying line 64 arranged before the first direction-changing conveying device 61, and a buffer mechanism 65 arranged on the third conveying line 64. The buffer mechanism 65 is used to receive a plurality of battery pieces conveyed by the third conveying line 64 and to put the received plurality of battery pieces into the third conveying line 64.

[0119] The battery piece conveying unit 60 can receive battery pieces from the printing device of the preceding stage and convey the received battery pieces to the bearing device 10. When the speed of receiving battery pieces from the printing device of the preceding stage is inconsistent with the speed of outputting battery pieces to the bearing device 10 of the following stage, the buffer mechanism 65 can ensure that the printing device of the preceding stage or the curing device 20 and the cooling device 30 of the following stage do not stop, thereby ensuring the production efficiency of the battery pieces.

[0120] Specifically, when the speed of receiving battery pieces from the printing device of the preceding stage is greater than the speed of outputting battery pieces to the bearing device 10 of the following stage, the buffer mechanism 65 can store the excess battery pieces, thereby ensuring that the printing device of the preceding stage can continuously work.

[0121] It can be conceived that when the speed of outputting battery pieces to the bearing device 10 of the following stage is greater than the speed of receiving battery pieces from the printing device of the preceding stage, the battery pieces on the buffer mechanism 65 can be put into the third conveying line 64, so that the curing device 20 and the cooling device 30 of the following stage can process the battery pieces at full capacity.

[0122] As Figures 16-18As shown, the cooling device 30 comprises a fan 31 for blowing air to the carrying device 10 and a blowing pipe 32 for blowing protective gas to the carrying device 10. When the cooling device 30 cools the battery piece, the blowing pipe 32 first blows protective gas to the carrying device 10 to cool the battery piece on the carrying device 10 and isolate the conductive paste of the battery piece from oxygen, so as to avoid oxidation of the conductive paste at high temperature. After the conductive paste of the battery piece drops to a preset temperature or the blowing pipe 32 blows air for a predetermined time, the fan 31 starts to work to drive air to flow to the battery piece on the carrying device 10 to cool the battery piece.

[0123] In the above scheme, the battery piece is cooled in the case of isolation from oxygen, and then cooled by air after the temperature of the battery piece drops to a certain range. Compared with the way of directly cooling the battery piece by air, the reaction of the grid line formed by solidification of the conductive paste with oxygen in air at high temperature is avoided, and the appearance of the oxidation layer is reduced.

[0124] The fan 31 is provided in plurality, and the plurality of fans 31 are arranged in an array. The air blown by the plurality of fans 31 can effectively cover the battery piece on the carrying device 10. In addition, the blowing speed of the fan 31 is adjustable, and the blowing amount thereof can be configured as required. The blowing pipe 32 is also provided in plurality. The protective gas blown by the plurality of blowing pipes 32 can effectively cover the battery piece on the carrying device 10.

[0125] The cooling device 30 further comprises a connecting frame 33 fixedly arranged opposite the carrying device 10. The plurality of fans 31 and the plurality of blowing pipes 32 are connected to the connecting frame 33.

[0126] The end of the blowing pipe 32 is used to communicate the protective gas. A plurality of blowing holes 321 are formed on the outer circumferential surface of the blowing pipe 32. The protective gas enters the blowing pipe 32 from the end of the blowing pipe 32 and is blown out from the blowing holes 321. The plurality of blowing holes 321 are distributed in a circumferential direction of the blowing pipe 32. In this way, the blowing pipe 32 can spray protective gas in multiple directions.

[0127] Specifically, along the length direction of the blowing pipe 32, the 2N-1th blowing hole 321 is at the same position in the circumferential direction of the blowing pipe 32, the 2Nth blowing hole 321 is at the same position in the circumferential direction of the blowing pipe 32, and the 2N-1th blowing hole 321 and the 2Nth blowing hole 321 are arranged in a staggered manner in the circumferential direction of the blowing pipe 32. N is an integer greater than or equal to 1.

[0128] The plurality of blowing holes 321 are arranged in a circumferential staggered manner in the above manner, so that each blowing pipe 32 can blow protective gas out in two different directions. Therefore, the protective gas blown by the plurality of blowing pipes 32 can effectively cover the battery piece on the carrying device 10.

[0129] It should be understood that although the specification is described according to the embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0130] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit the present application, and although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A cell curing apparatus, characterized by, The utility model relates to a battery piece solidification device, which comprises a bearing device for bearing a battery piece printed with conductive paste, a solidification device for pressing the battery piece and simultaneously heating the conductive paste on the battery piece, and a cooling device for cooling the battery piece processed by the solidification device. The solidification device comprises a solidification box located on one side of the bearing device in the height direction of the battery piece solidification device, a lifting driving assembly for driving the solidification box to move relative to the bearing device in the height direction of the battery piece solidification device, a pressing surface of the solidification box facing the bearing device, and a heating assembly arranged inside the solidification box, the pressing surface being used for applying pressure to the conductive paste of the battery piece; the solidification device further comprises a pressing film, at least a part of the length of the pressing film being located between the pressing surface and the bearing device in the height direction of the battery piece solidification device. The solidification box comprises a box body, a shell arranged on the periphery of the box body, the heating assembly being arranged in the box body, the pressing surface being located on the box body, the solidification box further comprising a connecting block connected to the lifting driving assembly, the box body and the shell being movably connected to the connecting block in the height direction of the battery piece solidification device, the shell being arranged closer to the bearing device than the box body, so that, during the movement of the connecting block towards the bearing device driven by the lifting driving assembly, the box body can still move towards the bearing device relative to the shell after the shell contacts the bearing device; when the shell contacts the bearing device, the box body, the shell, and the bearing device form an air chamber, and at least a part of the length of the pressing film is located in the air chamber. The shell and the box body form a cavity for filling protective gas, the cavity having a gas blowing port communicating with the inside and outside of the cavity, and the gas blowing port communicates with the air chamber when the box body, the shell, and the bearing device form the air chamber. The solidification device further comprises a base fixed relative to the bearing device, a plurality of roller shafts rotatably connected to the base about their own axes, the plurality of roller shafts comprising a first roller shaft and a second roller shaft located on the two sides of the solidification box in the length direction of the battery piece solidification device, and a third roller shaft and a fourth roller shaft located on the side of the first roller shaft and the second roller shaft away from the bearing device in the height direction of the battery piece solidification device, a part of the length of the pressing film being wound on the third roller shaft and the fourth roller shaft, and the part of the length of the pressing film extending from the third roller shaft to the fourth roller shaft contacting the outer circumferential surface of the first roller shaft and the outer circumferential surface of the second roller shaft. ​ ​ 2. The cell curing apparatus according to claim 1, characterized by, ​ 3. The cell curing apparatus of claim 1, wherein, ​ 4. The cell curing apparatus according to claim 3, characterized by The fourth roller and the second roller are arranged at intervals in the length direction of the battery piece curing device, and a plurality of the rollers further include a fifth roller, a film pressing portion extending from the fourth roller to a length of the second roller contacts an outer circumferential surface of the fifth roller, and the fifth roller is movably arranged in the height direction of the battery piece curing device relative to the base.

5. The cell curing apparatus of claim 3, wherein The curing device further includes a first driving member connecting the base and the first roller, and a second driving member connecting the base and the second roller, the first driving member is used to drive the first roller to move in the height direction of the battery piece curing device relative to the bearing device, and the second driving member is used to drive the second roller to move in the height direction of the battery piece curing device relative to the bearing device.

6. The cell curing apparatus of claim 1, wherein, The battery piece curing device includes a first bearing device and a second bearing device, a first curing device and a first cooling device corresponding to the first bearing device, and a second curing device and a second cooling device corresponding to the second bearing device, and the battery piece curing device further includes a conveying unit used to convey the battery piece to the first bearing device and the second bearing device.

7. The cell curing apparatus of claim 1, wherein, The cooling device includes a fan used to blow air to the bearing device, and a blowing pipe used to blow protective gas to the bearing device.

8. The cell curing apparatus of claim 1, wherein, The bearing device is a conveying device used to convey the battery piece in the length direction of the battery piece curing device, and the cooling device is located behind the curing device in the conveying direction of the conveying device.

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