Boat bearing block for improving conductivity of TOPCon battery piece in coating process

Abstract

The utility model discloses a boat bearing block for improving the conductivity of a TOPCon battery piece in a coating process, which relates to the technical field of solar battery production and comprises a boat bearing block body, a mounting hole is arranged on the boat bearing block body, an insulating shaft penetrates through an inner cavity of the mounting hole, a reserved groove is arranged at the top of the boat bearing block body, and a second electrode block is arranged in an inner cavity of the reserved groove. And positioning assemblies are arranged on the two sides of the second electrode block, a second groove is formed in the top of the second electrode block, the first electrode block is placed in an inner cavity of the second groove, and a protection barrel is installed on the edge of the top of the boat bearing block body. According to the utility model, the boat foot, the first groove, the first electrode block, the second groove, the second electrode block, the boat bearing block body and the preformed groove are arranged in a matched manner, so that only the first electrode block is worn when the conductive electrode is worn in the use process, and only the first electrode block is replaced when the conductive electrode is replaced, thereby further reducing the replacement cost of the electrode and improving the replacement efficiency of the electrode. And the coating cost is greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell production, in particular to a boat block for improving the conductivity of a TOPCon cell sheet coating process. Background Art

[0002] As a new type of passivation technology, TOPCon has become a research hotspot. This technology generates an ultra-thin tunneling oxide layer and a highly doped polysilicon layer on the surface of the battery. The passivation effect of the oxide layer and the field passivation effect of the highly doped polysilicon layer can greatly reduce the minority carrier recombination rate. At the same time, the highly doped polysilicon layer has good conductivity for majority carriers. Therefore, TOPCon batteries have high open circuit voltage and fill factor. When coating TOPCon cells, the silicon wafers to be coated are mounted on a graphite boat, and then the graphite boat is pushed into a vacuum reactor. The boat feet of the graphite boat are energized through the boat support block to form an electric field. At the same time, silane and ammonia are introduced into the vacuum reactor. Under the action of the electric field, the interaction of silane and ammonia generates silicon nitride and adheres to the silicon wafer, thus completing the coating.

[0003] In the process of realizing the utility model, the inventors found that there are at least the following problems in the technology: the existing boat block is made of stainless steel, and the fragmented molten silicon will adhere to the boat block during the coating process, resulting in poor contact between the boat block and the graphite boat. The boat block needs to be replaced frequently to ensure the yield rate of the battery cells. Since the boat block is heavy, it is time-consuming and laborious to replace it, which greatly increases the coating cost. Utility Model Content

[0004] In order to improve the problem that the existing boat block mentioned above is made of stainless steel, the fragmented molten silicon will adhere to the boat block during the coating process, resulting in poor contact between the boat block and the graphite boat. The boat block needs to be replaced frequently to ensure the yield rate of the battery cell. Since the boat block is heavy, it is time-consuming and laborious to replace it, which greatly increases the coating cost. The utility model provides a boat block that improves the conductivity of the TOPCon battery cell coating process.

[0005] The utility model provides a boat block for improving the conductivity of the TOPCon cell plating process, and adopts the following technical solutions:

[0006] A boat block for improving the conductivity of a TOPCon cell plating process comprises a boat block body, a mounting hole is provided on the boat block body, an insulating shaft is passed through the inner cavity of the mounting hole, a reserved groove is provided on the top of the boat block body, a second electrode block is placed in the inner cavity of the reserved groove, positioning components are provided on both sides of the second electrode block, a second groove is provided on the top of the second electrode block, a first electrode block is placed in the inner cavity of the second groove, a protective tube is installed at the edge of the top of the boat block body, clamping components are provided on both sides of the protective tube, a boat foot is provided between two groups of the clamping components, the top of the boat foot extends out of the protective tube, and the bottom of the boat foot is provided with a first groove that matches the first electrode block.

[0007] By adopting the above technical scheme, the second electrode block is installed in the reserved groove, the second electrode block is positioned by the positioning assembly, and then the first electrode block is installed in the second groove, and then the boat foot is installed on the first electrode block, and the boat foot is positioned by the clamping assembly, so that the boat foot is not easy to be misplaced when connected with the first electrode block and the second electrode block, thereby increasing the reliability of the conductivity of the boat block body, and the graphite boat is energized through the first electrode block and the second electrode block. When the electrode needs to be replaced, there is no need to replace the entire boat foot. When the electrode is worn during use, only the first electrode block is worn, and only the first electrode block needs to be replaced during replacement, thereby further reducing the replacement cost of the electrode and greatly saving the coating cost.

[0008] Optionally, the number of the first electrode blocks is set to two groups, and the two groups of first electrode blocks are symmetrically distributed about the center of the second electrode block.

[0009] By adopting the above technical solution, when the electrode is worn during use, only the first electrode block is worn, and when replaced, only the first electrode block needs to be replaced, thereby further reducing the replacement cost of the electrode and greatly saving the coating cost.

[0010] Optionally, both the first electrode block and the second electrode block are graphite electrode blocks.

[0011] By adopting the above technical solution, the conductivity of the first electrode block and the second electrode block is improved.

[0012] Optionally, the positioning assembly includes a pull rod, which passes through both sides of the reserved groove, and a positioning plate is connected to the side of the pull rod close to the center of the reserved groove, and an end of the pull rod away from the positioning plate extends out of the reserved groove and is installed with a pull plate, and a positioning spring is provided on the outer wall of the pull rod, and the positioning spring is located between the positioning plate and the inner wall of the reserved groove.

[0013] By adopting the above technical solution, under the elastic force of the positioning spring, the inner side of the positioning plate is always in close contact with the outer side of the second electrode block, so as to facilitate the positioning of the second electrode block.

[0014] Optionally, a reserved hole is opened at the top of the protective tube, and the cross-sectional area of ​​the reserved hole is larger than the cross-sectional area of ​​the boat foot.

[0015] By adopting the above technical solution, it is convenient to extend the boat leg into the inner cavity of the protective tube.

[0016] Optionally, the clamping assembly includes a sliding rod, which passes through both sides of the protective tube, a clamping plate is installed on one side of the sliding rod close to the center of the protective tube, a mounting plate is installed on the end of the sliding rod away from the clamping plate, and a fixing plate is installed on the outer side of the protective tube away from the sliding rod. A movable rod passes through the inner cavity of the fixing plate, a T-shaped plug rod is connected to the bottom of the movable rod, a reset spring is sleeved on the outer wall of the movable rod, the reset spring is located between the fixing plate and the T-shaped plug rod, and slots that are plug-in compatible with the T-shaped plug rod are evenly spaced on the top of the sliding rod.

[0017] By adopting the above technical solution, when the boat foot needs to be clamped, the movable rod is pulled up, and the movable rod drives the fixed plate to move upward, and the fixed plate drives the T-shaped plug rod to move upward and compresses the reset spring, so that the T-shaped plug rod is separated from the slot, thereby releasing the fixing effect of the T-shaped plug rod on the sliding rod. Then the staff holds the mounting plate and moves it toward the direction of the boat foot. The mounting plate drives the splint to move toward the direction of the boat foot through the sliding rod until the two sets of splints clamp and fix the boat foot.

[0018] Optionally, a pull ring is connected to the top of the movable rod.

[0019] By adopting the above technical solution, it is convenient for the staff to hold the pull ring and pull the movable rod to move.

[0020] In summary, the present invention has at least one of the following beneficial effects:

[0021] (1) By coordinating the boat foot, the first groove, the first electrode block, the second groove, the second electrode block, the boat support block body and the reserved groove, it is ensured that when the conductive electrode is worn during use, only the first electrode block is worn, and when it is replaced, only the first electrode block needs to be replaced, thereby further reducing the replacement cost of the electrode and greatly saving the coating cost.

[0022] (2) By setting the positioning component, the second electrode block can be limited, and by setting the clamping component, the boat foot can be clamped and fixed, so that the boat foot is not easily misplaced when connected to the first electrode block and the second electrode block, thereby increasing the reliability of the conductivity of the boat block body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0025] Figure 2 For the utility model Figure 1 Schematic diagram of the structure at A in the middle;

[0026] Figure 3 For the utility model Figure 1 Schematic diagram of the structure at point B in the middle.

[0027] In the figure: 1. boat foot; 2. first groove; 3. first electrode block; 4. second groove; 5. second electrode block; 6. boat support block body; 7. insulating shaft; 8. mounting hole; 9. reserved groove; 10. protective tube; 11. positioning assembly; 1101. pull rod; 1102. positioning plate; 1103. positioning spring; 1104. pull plate; 12. reserved hole; 13. clamping assembly; 1301. clamping plate; 1302. movable rod; 1303. fixed plate; 1304. reset spring; 1305. T-shaped plug rod; 1306. slot; 1307. slide rod; 1308. mounting plate. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-3 The utility model is described in further detail.

[0029] Please refer to the attached figure in the instruction manual Figure 1 and Figure 2The utility model provides an embodiment: a boat block for improving the conductivity of a TOPCon cell plating process, comprising a boat block body 6, a mounting hole 8 is provided on the boat block body 6, an insulating shaft 7 is horizontally passed through the inner cavity of the mounting hole 8, a reserved groove 9 is provided on the top of the boat block body 6, a second electrode block 5 is placed in the inner cavity of the reserved groove 9, and positioning components 11 are provided on both sides of the second electrode block 5, the positioning component 11 comprises a pull rod 1101, the pull rod 1101 slides through both sides of the reserved groove 9, a positioning plate 1102 is fixedly connected to one side of the pull rod 1101 close to the center of the reserved groove 9, an end of the pull rod 1101 away from the positioning plate 1102 extends out of the reserved groove 9 and is fixedly installed with a pull plate 1104, and a positioning spring 1103 is sleeved on the outer wall of the pull rod 1101, and the positioning spring 1103 is located between the positioning plate 1102 and the inner wall of the reserved groove 9. Under the elastic force of the positioning spring 1103 , the inner side of the positioning plate 1102 is always in close contact with the outer side of the second electrode block 5 , so as to facilitate the positioning of the second electrode block 5 .

[0030] Please refer to the attached figure in the instruction manual Figure 1 A second groove 4 is provided on the top of the second electrode block 5, and a first electrode block 3 is placed in the inner cavity of the second groove 4. There are two groups of first electrode blocks 3, and the two groups of first electrode blocks 3 are symmetrically distributed about the center of the second electrode block 5. When the electrode is worn during use, only the first electrode block 3 is worn, and when replaced, only the first electrode block 3 needs to be replaced, thereby further reducing the replacement cost of the electrode and greatly saving the coating cost. Both the first electrode block 3 and the second electrode block 5 are graphite electrode blocks. The conductivity of the first electrode block 3 and the second electrode block 5 is improved.

[0031] Please refer to the attached figure in the instruction manual Figure 1 and Figure 3A protective tube 10 is fixedly installed at the edge of the top of the boat support block body 6, and clamping assemblies 13 are arranged on both sides of the protective tube 10. A boat foot 1 is arranged between the two sets of clamping assemblies 13. The clamping assembly 13 includes a slide bar 1307, and the slide bar 1307 runs through both sides of the protective tube 10. A clamping plate 1301 is installed on one side of the slide bar 1307 close to the center of the protective tube 10, and a mounting plate 1308 is installed on the end of the slide bar 1307 away from the clamping plate 1301. A fixed plate 1303 is installed at the end away from the sliding rod 1307, and a movable rod 1302 slides through the inner cavity of the fixed plate 1303. A T-shaped plug 1305 is fixedly connected to the bottom of the movable rod 1302. A reset spring 1304 is sleeved on the outer wall of the movable rod 1302. The reset spring 1304 is located between the fixed plate 1303 and the T-shaped plug 1305. Slots 1306 that are plugged into the T-shaped plug 1305 are arranged at equal intervals on the top of the sliding rod 1307. When the boat leg 1 needs to be clamped, the movable rod 1302 is pulled up, and the movable rod 1302 drives the fixed plate 1303 to move upward, and the fixed plate 1303 drives the T-shaped plug rod 1305 to move upward and compress the reset spring 1304, so that the T-shaped plug rod 1305 is separated from the slot 1306, and the fixing effect of the T-shaped plug rod 1305 on the slide bar 1307 is released, and then the staff holds the installation plate 1308 and moves it toward the boat leg 1, and the installation plate 1308 drives the clamping plate 1301 to move toward the boat leg 1 through the slide bar 1307 until the two groups of clamping plates 1301 clamp and fix the boat leg 1. A pull ring is connected to the top of the movable rod 1302. It is convenient for the staff to hold the pull ring and pull the movable rod 1302 to move.

[0032] Please refer to the attached figure in the instruction manual Figure 1 and Figure 3 The top of the boat foot 1 extends out of the protective tube 10, and a reserved hole 12 is provided at the top of the protective tube 10. The cross-sectional area of ​​the reserved hole 12 is larger than the cross-sectional area of ​​the boat foot 1. This facilitates the boat foot 1 to be inserted into the inner cavity of the protective tube 10. The bottom of the boat foot 1 is provided with a first groove 2 that matches the first electrode block 3.

[0033] Working principle: When in use, the staff pulls the pull plate 1104 outward, and the pull plate 1104 drives the positioning plate 1102 to move outward through the pull rod 1101 and compresses the positioning spring 1103, and then installs the second electrode block 5 in the reserved groove 9, and then releases the pull plate 1104. Under the elastic force of the positioning spring 1103, the positioning plate 1102 clamps and fixes the second electrode block 5, and then installs the first electrode block 3 in the second groove 4, and then places the boat foot 1 on the first electrode block 3. Then the staff pulls up the movable rod 1302, and the movable rod 1302 drives the fixed plate 1303 to move upward, and the fixed plate 1303 drives the T-shaped plug 1305 to move upward and compress the reset spring 1304, so that the T-shaped plug 1305 is separated from the slot 1306, and the fixing effect of the T-shaped plug 1305 on the sliding rod 1307 is released, and then the staff holds the installation plate 130 8 moves toward the direction of the boat foot 1, and the mounting plate 1308 drives the clamping plate 1301 to move toward the direction of the boat foot 1 through the sliding rod 1307 until the two sets of clamping plates 1301 clamp and fix the boat foot 1, and then the movable rod 1302 is released. Under the elastic force of the reset spring 1304, the T-shaped plug rod 1305 moves downward and is inserted into the slot 1306, so that the sliding rod 1307 can be locked and fixed, so that the boat foot 1 is not easy to be misplaced when connected with the first electrode block 3 and the second electrode block 5, which increases the reliability of the conductivity of the boat block body 6, and the graphite boat is energized through the first electrode block 3 and the second electrode block 5. When the electrode needs to be replaced, there is no need to replace the boat foot 1 as a whole. When the electrode is worn during use, only the first electrode block 3 is worn, and when replaced, only the first electrode block 3 needs to be replaced, thereby further reducing the replacement cost of the electrode and greatly saving the coating cost.

[0034] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A boat block for improving the conductivity of a TOPCon cell coating process, comprising a boat block body (6), characterized in that: The boat support block body (6) is provided with a mounting hole (8), the inner cavity of the mounting hole (8) is penetrated by an insulating shaft (7), the top of the boat support block body (6) is provided with a reserved groove (9), the inner cavity of the reserved groove (9) is provided with a second electrode block (5), both sides of the second electrode block (5) are provided with positioning components (11), the top of the second electrode block (5) is provided with a second groove (4), the inner cavity of the second groove (4) is provided with a first electrode block (3), a protective tube (10) is installed at the edge of the top of the boat support block body (6), both sides of the protective tube (10) are provided with clamping components (13), a boat foot (1) is provided between two groups of the clamping components (13), the top of the boat foot (1) extends out of the protective tube (10), and the bottom of the boat foot (1) is provided with a first groove (2) matching the first electrode block (3).

2. The boat block for improving the conductivity of TOPCon cell coating process according to claim 1, characterized in that: The number of the first electrode blocks (3) is set to two groups, and the two groups of the first electrode blocks (3) are symmetrically distributed about the center of the second electrode block (5).

3. The boat block for improving the conductivity of TOPCon cell coating process according to claim 1, characterized in that: The first electrode block (3) and the second electrode block (5) are both graphite electrode blocks.

4. The boat block for improving the conductivity of TOPCon cell coating process according to claim 1, characterized in that: The positioning assembly (11) comprises a pull rod (1101), wherein the pull rod (1101) passes through both sides of the reserved groove (9), and a positioning plate (1102) is connected to one side of the pull rod (1101) close to the center of the reserved groove (9), and an end of the pull rod (1101) away from the positioning plate (1102) extends out of the reserved groove (9) and is installed with a pull plate (1104), and a positioning spring (1103) is sleeved on the outer wall of the pull rod (1101), and the positioning spring (1103) is located between the positioning plate (1102) and the inner wall of the reserved groove (9).

5. The boat block for improving the conductivity of TOPCon cell coating process according to claim 1, characterized in that: A reserved hole (12) is provided at the top of the protective tube (10), and the cross-sectional area of ​​the reserved hole (12) is larger than the cross-sectional area of ​​the boat foot (1).

6. The boat block for improving the conductivity of TOPCon cell coating process according to claim 1, characterized in that: The clamping assembly (13) comprises a sliding rod (1307), wherein the sliding rod (1307) passes through both sides of the protective tube (10), a clamping plate (1301) is installed on one side of the sliding rod (1307) close to the center of the protective tube (10), a mounting plate (1308) is installed on one end of the sliding rod (1307) away from the clamping plate (1301), and a fixing plate (1303) is installed on the outer side of the protective tube (10) away from the sliding rod (1307). A movable rod (1302) passes through the inner cavity of the plate (1303), and a T-shaped plug rod (1305) is connected to the bottom of the movable rod (1302). A return spring (1304) is sleeved on the outer wall of the movable rod (1302), and the return spring (1304) is located between the fixed plate (1303) and the T-shaped plug rod (1305). Slots (1306) that are plugged into and matched with the T-shaped plug rod (1305) are provided at equal intervals on the top of the sliding rod (1307).

7. The boat block for improving the conductivity of TOPCon cell coating process according to claim 6, characterized in that: The top of the movable rod (1302) is connected with a pull ring.

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