N-type TOPCon battery coating device capable of improving coating uniformity

Abstract

The invention provides an N-type TOPCon battery coating device capable of improving coating uniformity, and relates to the technical field of TOPCon battery manufacturing, the N-type TOPCon battery coating device comprises a coating reinforcing table, a supporting table is vertically welded to the left side of the upper surface of the coating reinforcing table, a spiral push cylinder is connected to the upper portion of the supporting table through a bolt, a push rod of the spiral push cylinder is perpendicular to the upper surface of the coating reinforcing table, and the upper surface of the coating reinforcing table is provided with a through hole; the heating wire is electrified to heat the film on the outer surface of the battery, so that the film body is in a high-temperature and high-pressure state, tiny wrinkles on the surface of the film body are flattened in the laminating process in the high-pressure state, the film body is softened in the high-pressure state, the film body is more easily attached to the outer surface of the battery piece, and the probability of generating bubbles in the film coating process is reduced; the problems that in the traditional TOPCon battery coating process, after a POE film is coated on the surface of a battery, a film body lacks an external auxiliary positioning structure, the firmness of the film body on the TOPCon battery cannot be further enhanced, and the coating uniformity and the service life of the TOPCon battery are affected due to the fact that wrinkles exist in the film body after coating are solved.

Description

Technical Field

[0001] The invention relates to the technical field of TOPCon battery manufacturing, and in particular to an N-type TOPCon battery coating device for improving coating uniformity. Background Art

[0002] N-type TOPCon cell is an advanced solar cell technology, which is based on N-type silicon substrate. By preparing ultra-thin silicon oxide and doped silicon thin layers on the back of the cell to form a passivated contact structure, the conversion efficiency of the cell is significantly improved. Compared with traditional P-type cells, N-type TOPCon cells have the advantages of longer minority carrier lifetime, weak light effect, small temperature coefficient, etc. Its theoretical limit conversion efficiency is as high as 28.7%, which is an important development direction of high-efficiency solar cells. During the manufacturing process of TOPCon cells, in order to improve the waterproofness and wear resistance of TOPCon cells, POE film needs to be plated on the outer layer of TOPCon cells.

[0003] In the traditional TOPCon battery coating process, after the POE film is coated on the battery surface, the film lacks an external auxiliary positioning structure, which cannot further enhance the firmness of the film on the TOPCon battery. In addition, wrinkles on the film after coating will affect the coating uniformity and the service life of the TOPCon battery. Summary of the invention

[0004] The disclosed embodiments relate to an N-type TOPCon battery coating device for improving coating uniformity, so as to solve the problems in the traditional TOPCon battery coating process, that after the POE film is coated on the battery surface, the film body lacks an external auxiliary positioning structure, and the firmness of the film body on the TOPCon battery cannot be further enhanced, and the film body has wrinkles after coating, which affects the coating uniformity and shortens the service life of the TOPCon battery.

[0005] In a first aspect of the present disclosure, a N-type TOPCon battery coating device for improving coating uniformity is provided, specifically comprising: a coating reinforcement platform, a support platform is vertically welded to the left side of the upper surface of the coating reinforcement platform, a spiral push cylinder is connected to the top of the support platform by bolts, the push rod of the spiral push cylinder is perpendicular to the upper surface of the coating reinforcement platform, the lower end of the push rod of the spiral push cylinder is fixedly connected to a pressure push plate, the upper surface of the coating reinforcement platform is fixedly connected to a fixed pad platform by screws, a coating heating plate is movably connected to the top of the fixed pad platform, a TOPCon battery holder is movably connected to the coating reinforcement platform, a battery socket is installed on the TOPCon battery holder, a translation drive member is installed on the lower edge of the left surface of the coating reinforcement platform by bolts, the bottom of the coating reinforcement platform is rotatably connected to a spiral push rod by a bearing, and the left end of the spiral push rod is connected to the rotating shaft of the translation drive member by a coupling.

[0006] In at least some embodiments, two directional wheel rails are transversely provided on the upper surface of the coating reinforcement platform, and a guide rail is longitudinally provided through the coating reinforcement platform. The guide rail is parallel to the directional wheel rails and is located between the two directional wheel rails.

[0007] In at least some embodiments, two round-bar structured platform guide rods are vertically welded to the front edge and the rear edge of the upper surface of the fixed platform.

[0008] In at least some embodiments, the coating heating plate is an aluminum plate, a heating wire is arranged inside the coating heating plate, and the front edge and the rear edge of the coating heating plate are respectively fixedly connected with side connecting plates.

[0009] In at least some embodiments, a connecting plate guide hole is vertically penetrated through the side connecting plate, a pad guide rod is slidably connected in the connecting plate guide hole, and two connecting plate limiting top springs are fixedly connected to the lower surface of the side connecting plate, and the connecting plate limiting top springs are located at the outer periphery of the lower edge of the connecting plate guide hole.

[0010] In at least some embodiments, a connecting plate limiting hole is longitudinally opened at the center position of the upper surface of the side connecting plate, a connecting plate limiting guide rod is vertically welded to the lower surface of the side connecting plate, and the lower end of the connecting plate limiting guide rod is connected to a limiting protrusion.

[0011] In at least some embodiments, a bracket connecting plate is welded to the center of the lower surface of the TOPCon battery bracket, the bracket connecting plate is slidably connected in the guide rail, translation guide wheels are installed below the front edge and the rear edge of the TOPCon battery bracket, the translation guide wheels are rollingly connected to the directional wheel rails, and a bracket spiral push block is fixedly connected to the lower end of the bracket connecting plate, and the bracket spiral push block and the spiral push rod form a spiral transmission.

[0012] In at least some embodiments, two bracket guide rods are vertically welded to the upper front edge and the rear edge of the TOPCon battery bracket, a floating side frame is provided above the TOPCon battery bracket, a side frame guide hole is opened on the floating side frame, the bracket guide rod is slidably connected in the side frame guide hole, and a side frame limit top spring is fixedly connected to the lower surface of the floating side frame, and the side frame limit top spring is located at the outer periphery of the lower edge of the side frame guide hole.

[0013] In at least some embodiments, a side frame limiting hole is opened above the floating side frame, a side frame limiting guide rod is fixedly connected to the lower surface of the floating side frame, and a limiting protrusion is connected to the lower end of the side frame limiting guide rod.

[0014] The two upper and lower adjacent floating side frames are connected via a side frame limit top spring, and the side frame limit guide rod of the upper floating side frame is slidably connected to the side frame limit hole of the lower floating side frame.

[0015] The present invention provides an N-type TOPCon battery coating device for improving coating uniformity, which has the following beneficial effects: The N-type TOPCon battery coating device of the present invention is provided with a TOPCon battery holder for installing TOPCon batteries. The batteries are installed at uniform intervals through the TOPCon battery holder and the battery plug sleeve, so that there is a certain gap between the upper and lower adjacent TOPCon batteries, so that the batteries are installed in groups in a longitudinal arrangement after the film body is assembled, and has a spacing control function, which facilitates the installation of the batteries between the front and rear battery plug sleeves, thereby improving the installation and removal efficiency of the batteries.

[0016] In addition, the coating and heating plates in the present invention are arranged longitudinally, and the spacing between the upper and lower adjacent coating and heating plates is equal. When the N-type TOPCon batteries are evenly distributed and arranged on the TOPCon battery holder at longitudinal intervals, the TOPCon battery holder is controlled to move left as a whole, so that the TOPCon batteries can be interspersed and arranged in the gaps between adjacent coating and heating plates. At this time, the pressure push plate is pushed downward by the spiral push cylinder to squeeze the coating and heating plates downward, thereby reducing the gaps between the longitudinally adjacent coating and heating plates, so that the coating and heating plates are closely fitted to the outer surface of the TOPCon battery. At the same time, the heating wire is energized to heat the coating and heating plates, and the film on the outer surface of the battery is heated, so that the film body is in a high temperature and high pressure state. Under the high pressure state, the tiny wrinkles on the surface of the film body are flattened during the lamination process, and the film body is softened under the high pressure state, which makes it easier to fit the outer surface of the battery cell. The coating and heating plate are evenly fitted to the outer surface of the TOPCon battery, thereby improving the heating uniformity of the TOPCon battery and reducing the probability of bubbles generated during the coating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0018] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached picture: Figure 1 A schematic diagram showing the overall structure of the present application; Figure 2 The overall front view structural diagram of the present application is shown; Figure 3 It shows a schematic diagram of the structure of the TOPCon battery bracket of the present application after being moved to the left; Figure 4 Shows this application Figure 1 A schematic diagram of the structure at the bottom of the; Figure 5 Shows this application Figure 3 A schematic diagram of the front view of the structure; Figure 6 It shows a schematic diagram of the structure of the present application in which the floating side frame and the support guide rod are separated; Figure 7 Shows this application Figure 6 A schematic diagram of the structure at the bottom of FIG. Figure 8 A schematic diagram of the structure inside the coating and heating plate of the present application is shown; Fig. 9 It shows a schematic diagram of the structure of the coating heating plate and the TOPCon battery bracket of the present application in a separated state; Fig.10 This application shows Figure 4 A schematic diagram of the partially enlarged structure at point A in the middle; Fig.11 This application shows Figure 7 Schematic diagram of the partially enlarged structure at point B in the middle.

[0020] List of reference numerals: 1. Coating reinforcement platform; 101. Directional wheel rail; 102. Guide slide rail; 2. Support platform; 3. Screw push cylinder; 4. Pressurized push plate; 5. Fixed pad; 501. Pad guide rod; 6. Coating heating plate; 601. Heating wire; 602. Side connecting plate; 603. Connecting plate guide hole; 604. Connecting plate limit top spring; 605. Connecting plate limit hole; 606. Connecting plate limit guide rod; 7. TOPCon battery bracket; 701. Bracket connecting plate; 702. Bracket screw push block; 703. Translation guide wheel; 704. Bracket guide rod; 705. Floating side frame; 706. Side frame guide hole; 707. Side frame limit top spring; 708. Side frame limit hole; 709. Side frame limit guide rod; 8. Battery socket; 9. Translation drive member; 10. Screw push rod. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1 to 11 : The present invention proposes an N-type TOPCon battery coating device for improving coating uniformity, comprising: a coating reinforcement platform 1, a support platform 2 is vertically welded on the left side of the upper surface of the coating reinforcement platform 1, a spiral push cylinder 3 is connected to the upper side of the support platform 2 by bolts, the push rod of the spiral push cylinder 3 is perpendicular to the upper surface of the coating reinforcement platform 1, and the lower end of the push rod of the spiral push cylinder 3 is fixedly connected to a pressure push plate 4, a fixed pad 5 is fixedly connected to the upper surface of the coating reinforcement platform 1 by screws, a coating heating plate 6 is movably connected to the upper side of the fixed pad 5, a TOPCon battery holder 7 is movably connected to the coating reinforcement platform 1, a battery socket 8 is installed on the TOPCon battery holder 7, the right end of the battery socket 8 is bent in a direction away from the center of the TOPCon battery holder 7, which is conducive to the TOPCon battery being inserted between adjacent battery sockets 8 from right to left, the longitudinal section of the battery socket 8 is a "U"-shaped structure, and its inner surface is tightly fitted with the edge of the TOPCon battery to achieve the auxiliary fixing effect of the TOPCon battery, and the lower edge of the left surface of the coating reinforcement platform 1 is bolted A translation drive member 9 is installed, and a screw push rod 10 is rotatably connected to the bottom of the coating reinforcement platform 1 through a bearing. The left end of the screw push rod 10 is connected to the rotating shaft of the translation drive member 9 through a coupling. Two directional wheel rails 101 are horizontally opened on the upper surface of the coating reinforcement platform 1, and a guide slide rail 102 is longitudinally opened through the coating reinforcement platform 1. A bracket connecting plate 701 is welded at the center of the lower surface of the TOPCon battery bracket 7. The bracket connecting plate 701 is slidably connected in the guide slide rail 102, and the lower end of the bracket connecting plate 701 is fixedly connected to the bracket The spiral push block 702, the bracket spiral push block 702 and the spiral push rod 10 form a spiral transmission; the translation drive member 9 is a servo motor, which drives the spiral push rod 10 to rotate through the translation drive member 9, and the spiral push rod 10 rotates to form a spiral transmission with the bracket spiral push block 702, pushing the TOPCon battery holder 7 to move left and right on the coating reinforcement platform 1, thereby changing the position of the TOPCon battery holder 7, so that the TOPCon battery fixedly installed in the battery socket 8 can be laterally translated and inserted between the coating heating plates 6.

[0023] In the disclosed embodiment, two round rod structured platform guide rods 501 are respectively vertically welded to the front edge and the rear edge of the upper surface of the fixed platform 5. The coated heating plate 6 is an aluminum plate body, and a heating wire 601 is arranged inside the coated heating plate 6. The heating wires 601 in different coated heating plates 6 are connected to the power supply in parallel through a switch. When the switch is turned on, the heating wires 601 in different coated heating plates 6 are connected to the power supply at the same time and generate heat to heat the coated heating plate 6. The coated heating plate 6 made of aluminum has good thermal conductivity, and the heat emitted by the heating wire 601 can be transferred to the coating plate 6. The outer surface of the membrane heating plate 6 is used to uniformly heat the TOPCon battery and the membrane body attached to its outer surface, so that the membrane body is softened, which is more conducive to closely attaching to the outer surface of the TOPCon battery. The front edge and the rear edge of the coating heating plate 6 are respectively fixedly connected with side connecting plates 602, and a connecting plate guide hole 603 is vertically penetrated on the side connecting plate 602. The connecting plate guide hole 603 is slidably connected to the pad guide rod 501. The lower surface of the side connecting plate 602 is fixedly connected with two connecting plate limit top springs 604. The yield strength of the connecting plate limit top spring 604 is greater than 400g. The top spring 604 is located at the lower edge of the connecting plate guide hole 603, and a connecting plate limiting hole 605 is longitudinally opened at the center of the upper surface of the side connecting plate 602. A connecting plate limiting guide rod 606 is vertically welded to the lower surface of the side connecting plate 602, and the lower end of the connecting plate limiting guide rod 606 is spirally connected to the limiting protrusion; for a 182mm*182mm TOPCon battery, a coated heating plate 6 with a size slightly larger than 182mm*182mm is required. The weight of an aluminum plate of 182mm*182mm with appropriate thickness is about 200g, and for the four places located at the bottom As for the connecting plate limiting top spring 604, the weight shared in each connecting plate limiting top spring 604 is approximately 300g. The connecting plate limiting top spring 604 with a yield strength of 400g can effectively support the weight of multiple groups of coated heating plates 6. Under normal circumstances, the connecting plate limiting guide rod 606 of the coated heating plate 6 located above is slidably connected to the inside of the connecting plate limiting hole 605 located below, playing a guiding role, and playing a limiting role through the limiting protrusion. The pushing action of the connecting plate limiting top spring 604 keeps the adjacent coated heating plates 6 arranged at a fixed distance, thereby maintaining the arrangement position of the coated heating plates 6.

[0024] In the embodiment of the present disclosure, two bracket guide rods 704 are vertically welded to the upper front edge and the rear edge of the TOPCon battery bracket 7, respectively. A floating side frame 705 is provided above the TOPCon battery bracket 7, and the floating side frame 705 is fixedly connected to the battery plug sleeve 8. Under normal conditions, multiple floating side frames 705 at the front and rear sides are flush with each other to keep the front and rear battery plug sleeves 8 flush. A side frame guide hole 706 is provided on the floating side frame 705, and the side frame guide hole 706 is slidably connected to the bracket guide rod 704. A side frame limiting top spring 707 is fixedly connected to the lower surface of the floating side frame 705, and the side frame limiting top spring 707 is located at the outer periphery of the lower edge of the side frame guide hole 706. A side frame limiting hole 706 is provided above the floating side frame 705. 08, the lower surface of the floating side frame 705 is fixedly connected with a side frame limit guide rod 709, the lower end of the side frame limit guide rod 709 is spirally connected to a limit protrusion, and the two upper and lower adjacent floating side frames 705 are connected by a side frame limit top spring 707, and the side frame limit guide rod 709 of the upper floating side frame 705 is slidably connected to the side frame limit hole 708 of the lower floating side frame 705; under normal conditions, under the pushing action of the side frame limit top spring 707, the maximum spacing between adjacent floating side frames 705 is maintained, and the TOPCon battery with a size of 182mm*182mm*140µm is small in size and light in weight. Even the side frame limit top spring 707 at the bottom can easily support multiple batteries above. The weight of the TOPCon battery holder 7 and the TOPCon battery is not deformed and the arrangement density between the multiple floating side frames 705 is kept equal. When installing the battery sheet, the battery sheet can be inserted horizontally between the two battery plug sleeves 8 from right to left. The battery is fixed by the close fit between the battery plug sleeve 8 and the edge of the battery sheet, and the spacing between adjacent batteries is kept equal. After the coated TOPCon battery is inserted into the battery plug sleeve 8, the screw push rod 10 is driven to rotate by the translation drive member 9, and the screw push rod 10 rotates to form a spiral transmission with the support screw push block 702, pushing the TOPCon battery holder 7 to move left and right on the coating reinforcement table 1, and then The position of the TOPCon battery holder 7 is changed so that the TOPCon battery fixedly installed in the battery socket 8 can be laterally translated and inserted between the coating and heating plates 6, and the pressurizing push plate 4 is pushed downward by the spiral push cylinder 3, and the coating and heating plate 6 is pushed downward by the pressurizing push plate 4, so that the coating and heating plate 6 and the outer surface of the TOPCon battery are closely fitted, and the coating and heating plate 6 is evenly heated by the internal heating wire 601 of the coating and heating plate 6 to soften the film body, thereby improving the tightness of the film body and the outer surface of the TOPCon battery. The coating and heating plate 6, the TOPCon battery and the film body exert an extrusion force to flatten the tiny wrinkles of the film body, thereby improving the uniformity, firmness and flatness of the coating.

[0025] Embodiment 2, based on embodiment 1, translation guide wheels 703 are installed under the front edge and the rear edge of the TOPCon battery holder 7, and the translation guide wheels 703 are rollingly connected to the directional wheel rail 101 to play a guiding role, maintain the straightness of the path during the translation of the TOPCon battery holder 7, and reduce the noise generated during the translation of the TOPCon battery holder 7.

[0026] The working principle of this embodiment is as follows: first, insert the double-sided coated TOPCon battery from right to left between the two battery plug sleeves 8, so that the TOPCon battery fits tightly with the inner wall of the battery plug sleeve 8, and the TOPCon battery is fixedly installed on the TOPCon battery holder 7. Through the cooperation of multiple groups of floating side frames 705 and the battery plug sleeve 8, multiple TOPCon batteries are arranged longitudinally and installed in the TOPCon battery holder 7, and the translation drive member 9 is controlled to move, and the screw push rod 10 is driven to rotate by the translation drive member 9, and the screw push rod 10 and the support screw push block 70 are connected. 2 forms a spiral transmission, pushing the TOPCon battery holder 7 to move leftward on the coating reinforcement platform 1, thereby changing the position of the TOPCon battery holder 7, so that the TOPCon battery fixedly installed in the battery plug sleeve 8 can be horizontally translated and inserted between the coating and heating plates 6, and the pressurizing push plate 4 is pushed downward by the spiral push cylinder 3, and the coating and heating plate 6 is pushed downward by the pressurizing push plate 4, so that the coating and heating plate 6 and the outer surface of the TOPCon battery are closely attached, and the TOPCon battery moves downward and drives the battery plug sleeve 8 connected thereto to move downward synchronously and maintain the same height, and the upper and lower The distance between two adjacent coating heating plates 6 is equal. The coating heating plates 6 are heated evenly by the internal heating wire 601 to soften the film body, improve the tightness of the film body and the outer surface of the TOPCon battery, apply extrusion force through the coating heating plate 6, the TOPCon battery and the film body, flatten the tiny wrinkles on the surface of the film body, and thus improve the uniformity, firmness and flatness of the coating. The spiral push cylinder 3 is controlled to shrink and reset, so that the pressure push plate 4 moves up and resets. The adjacent side connecting plates 602 increase the distance under the action of the connecting plate limit top spring 604, so that the distance between the adjacent coating heating plates 6 is increased. , the coating and heating plate 6 is separated from the TOPCon battery in the battery socket 8, and the floating side frame 705 is reset under the elastic force of the side frame limit top spring 707, controlling the translation drive member 9 to rotate in the opposite direction, and pushing the TOPCon battery holder 7 to the right through the spiral transmission of the spiral push rod 10 and the bracket spiral push block 702, so that the coating and heating plate 6 is separated from the TOPCon battery. After the TOPCon battery is cooled, it is pulled to the right by a robot or manually, and the TOPCon battery is pulled out from between the adjacent battery sockets 8, and the coating reinforcement work of the TOPCon battery is completed.

[0027] In this article, there are a few points to note: 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0028] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0029] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An N-type TOPCon battery coating device for improving coating uniformity, comprising: A coating reinforcement platform (1), wherein a support platform (2) is vertically welded to the left side of the upper surface of the coating reinforcement platform (1), a spiral push cylinder (3) is connected to the upper side of the support platform (2) by bolts, the push rod of the spiral push cylinder (3) is perpendicular to the upper surface of the coating reinforcement platform (1), and the lower end of the push rod of the spiral push cylinder (3) is fixedly connected to a pressure push plate (4), characterized in that the upper surface of the coating reinforcement platform (1) is fixedly connected to a fixed pad platform (5) by screws, and the upper side of the fixed pad platform (5) is movable The coating reinforcement platform (1) is movably connected to a coating heating plate (6); a TOPCon battery holder (7) is movably connected to the coating reinforcement platform (1); a battery socket (8) is installed on the TOPCon battery holder (7); a translation drive member (9) is installed on the lower edge of the left surface of the coating reinforcement platform (1) via bolts; a screw push rod (10) is rotatably connected to the bottom of the coating reinforcement platform (1) via a bearing; and the left end of the screw push rod (10) is connected to the rotating shaft of the translation drive member (9) via a coupling.

2. According to claim 1, a N-type TOPCon battery coating device for improving coating uniformity is characterized in that: Two directional wheel rails (101) are transversely provided on the upper surface of the coating reinforcement platform (1), and a guide slide rail (102) is longitudinally provided through the coating reinforcement platform (1), the guide slide rail (102) is parallel to the directional wheel rails (101), and the guide slide rail (102) is located between the two directional wheel rails (101).

3. According to claim 1, a N-type TOPCon battery coating device for improving coating uniformity is characterized in that: Two round-bar-structured platform guide rods (501) are respectively vertically welded to the front edge and the rear edge of the upper surface of the fixed platform (5).

4. The N-type TOPCon battery coating device for improving coating uniformity according to claim 1, characterized in that: The coating heating plate (6) is an aluminum plate body, a heating wire (601) is arranged inside the coating heating plate (6), and the front edge and the rear edge of the coating heating plate (6) are respectively fixedly connected to the side connecting plates (602).

5. The N-type TOPCon battery coating device for improving coating uniformity according to claim 4, characterized in that: A connecting plate guide hole (603) is vertically penetrated through the side connecting plate (602), and a pad guide rod (501) is slidably connected in the connecting plate guide hole (603). Two connecting plate limit top springs (604) are fixedly connected to the lower surface of the side connecting plate (602), and the connecting plate limit top springs (604) are located at the outer periphery of the lower edge of the connecting plate guide hole (603).

6. The N-type TOPCon battery coating device for improving coating uniformity according to claim 5, characterized in that: A connecting plate limiting hole (605) is longitudinally opened at the center position of the upper surface of the side connecting plate (602), a connecting plate limiting guide rod (606) is vertically welded to the lower surface of the side connecting plate (602), and the lower end of the connecting plate limiting guide rod (606) is connected to a limiting protrusion.

7. The N-type TOPCon battery coating device for improving coating uniformity according to claim 2, characterized in that: A support connecting plate (701) is welded at the center of the lower surface of the TOPCon battery support (7), and the support connecting plate (701) is slidably connected in the guide rail (102). Translation guide wheels (703) are installed below the front edge and the rear edge of the TOPCon battery support (7), and the translation guide wheels (703) are rollingly connected to the directional wheel rail (101). The lower end of the support connecting plate (701) is fixedly connected to a support spiral push block (702), and the support spiral push block (702) and the spiral push rod (10) form a spiral transmission.

8. The N-type TOPCon battery coating device for improving coating uniformity according to claim 7, characterized in that: Two support guide rods (704) are vertically welded to the upper front edge and the rear edge of the TOPCon battery support (7), respectively; a floating side frame (705) is provided above the TOPCon battery support (7); a side frame guide hole (706) is provided on the floating side frame (705); the support guide rods (704) are slidably connected in the side frame guide hole (706); a side frame limit top spring (707) is fixedly connected to the lower surface of the floating side frame (705); the side frame limit top spring (707) is located at the outer periphery of the lower edge of the side frame guide hole (706).

9. The N-type TOPCon battery coating device for improving coating uniformity according to claim 8, characterized in that: A side frame limiting hole (708) is provided above the floating side frame (705), a side frame limiting guide rod (709) is fixedly connected to the lower surface of the floating side frame (705), and a limiting protrusion is connected to the lower end of the side frame limiting guide rod (709).

10. The N-type TOPCon battery coating device for improving coating uniformity according to claim 9, characterized in that: The two upper and lower adjacent floating side frames (705) are connected via a side frame limit top spring (707), and the side frame limit guide rod (709) of the upper floating side frame (705) is slidably connected to the side frame limit hole (708) of the lower floating side frame (705).

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