Tiled graphite boat of rear texturing type back contact battery and clamping device of tiled graphite boat

Abstract

The invention discloses a tiled graphite boat of a rear texturing type back contact battery and a clamping device thereof, and belongs to the technical field of solar cells, the tiled graphite boat comprises an upper boat page, a lower boat page, a plurality of inner boat pages located between the upper boat page and the lower boat page and electrodes, and the upper boat page, the lower boat page and the inner boat pages are all solid boat pages. And grooves are reserved in the lower boat page and the inner boat page and are used for fixing the silicon wafers in the boat. According to the tiled graphite boat, the sticking point design is omitted, the silicon wafer is flatly laid to enter a furnace tube process, sticking point marks caused by fixing the silicon wafer by a vertical boat are avoided, and the technical problem that the appearance of a product is affected by sticking point marks when the silicon wafer is fixed by sticking points due to the fact that a tubular furnace tube mostly adopts a vertical graphite boat in the current industry is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of solar cells, and in particular relates to a flat-laying graphite boat of a post-textured back-contact cell and a clamping device thereof. Background Art

[0002] BC cell refers to the back contact cell, an advanced design cell used to improve the efficiency of solar cells. However, due to the basic structural framework of the technical route of the cell, the absence of grid lines on the front makes the light absorption area larger, the light conversion is better, and the uniformity of the front film layer is more stringent, so the impact of the card point print is greater. Conventional vertical graphite boats are vertically hollowed out, and the silicon wafers in the boats are fixed by card points, which inevitably leads to the appearance of card point prints. This design reserves silicon wafer grooves and flat-lay coating for solid boat pages, which fundamentally solves the appearance problem caused by card point prints on BC cells. Summary of the invention

[0003] In order to solve the above problems, the present invention adopts the following technical solutions:

[0004] A flat-lay graphite boat for a post-textured back-contact battery comprises: an upper boat page, a lower boat page, a plurality of inner boat pages located between the upper boat page and the lower boat page, and electrodes:

[0005] The upper boat page, the lower boat page and the inner boat page are all solid boat pages, and the lower boat page and the inner boat page are both reserved with grooves, and the grooves are used to fix the silicon wafers in the boat.

[0006] Furthermore, a plurality of vacuum reserved holes are arranged at the center of the groove.

[0007] Furthermore, a plurality of ceramic pads are arranged between two adjacent boat leaves, and the ceramic pads are provided with reserved holes for passing the ceramic rods.

[0008] Furthermore, a ceramic foot is provided at the bottom end of the lower boat leaf.

[0009] Furthermore, an electrode block is arranged between the boat ears on both sides of the two middle inner boat pages, and the boat ears on both sides of the remaining parts are fixedly spaced by graphite blocks. The electrode block and the graphite block are both provided with reserved holes for passing the graphite rod.

[0010] A clamping device for a flat-laid graphite boat of a post-textured back-contact battery, using any of the above-mentioned flat-laid graphite boats of a post-textured back-contact battery, the clamping device comprising:

[0011] Top border;

[0012] A lower frame, the lower frame being located at the lower side of the upper frame;

[0013] A side frame, one end of which is connected to the upper frame, and the other end of which is connected to the lower frame;

[0014] Wherein, a plurality of retractable clamping components are arranged on the upper frame, the lower frame and the side frame for fixing the graphite boat.

[0015] Furthermore, the upper frame, the lower frame and the side frames are each provided with a plurality of hollow portions for reducing the overall weight.

[0016] Furthermore, the retractable clamping assembly comprises:

[0017] A retractable clamping block, wherein the retractable clamping block is located on a side close to the graphite boat;

[0018] A compressed air pipeline, one end of which is connected to the retractable clamping block, and the other end of which is connected to the air compressor.

[0019] Furthermore, a grating sensor is provided on one side of the retractable clamping block, the grating sensor is electrically connected to a controller, and the controller is electrically connected to the air compressor.

[0020] Beneficial effects:

[0021] The flat-laid graphite boat of the present invention cancels the card point design, allowing the silicon wafer to enter the furnace tube process when laid flat, avoiding the card point marks caused by the vertical boat fixing the silicon wafer, and solving the technical problem that the current industry tubular furnace tubes mostly use vertical graphite boats, and the silicon wafers are fixed by card points, and the card point marks will affect the appearance of the product.

[0022] The present invention fixes the graphite boat by means of a clamping device to assist in the loading of the sheets, thereby ensuring that the graphite boat will not shake or deform due to external force during the loading process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the graphite boat of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall structure of the clamping device and the graphite boat of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the upper frame of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the side frame of the present invention;

[0027] Figure 5 It is a bottom view schematic diagram of the boat page of the present invention;

[0028] Figure 6 This is a schematic diagram of the inserting method of the present invention;

[0029] Figure 7 The boat leaf assembly diagram of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 8 The boat leaf assembly diagram of the present invention is shown in FIG. Figure 2 ;

[0031] Fig. 9 The boat leaf assembly diagram of the present invention is shown in FIG. Figure 3 ;

[0032] Fig.10 It is a schematic diagram of a graphite rod of the present invention;

[0033] Fig.11 It is a schematic diagram of a neutral graphite boat in the prior art.

[0034] Among them, 1. Graphite boat; 1.1. Vacuum reserved hole; 2. Ceramic pad; 3. Upper boat page; 4. Lower boat page; 5. Ceramic pad; 6. Graphite rod; 7. Ceramic rod; 8. Graphite block; 9. Electrode block; 10. Retractable clamping assembly; 11. Robot; 12. Suction teeth; 13. Silicon wafer; 14. Upper frame; 15. Side frame; 16. Lower frame. DETAILED DESCRIPTION

[0035] Example 1

[0036] refer to Figure 1-Figure 11 A flat-lay graphite boat 1 of a post-textured back contact battery comprises: an upper boat page 3, a lower boat page 4, a plurality of inner boat pages and electrodes located between the upper boat page 3 and the lower boat page 4:

[0037] The upper boat page 3 , the lower boat page 4 and the inner boat page are all solid boat pages, and the lower boat page 4 and the inner boat page are both pre-reserved with grooves, which are used to fix the silicon wafer 13 in the boat.

[0038] In this embodiment, a plurality of vacuum reserved holes 1.1 are arranged at the center of the groove.

[0039] In this embodiment, a plurality of ceramic pads 2 are disposed between two adjacent boat leaves, and reserved holes are disposed on the ceramic pads 2 for passing the ceramic rods 7 .

[0040] In this embodiment, a ceramic foot 5 is provided at the bottom end of the lower boat leaf 4 .

[0041] In this embodiment, an electrode block 9 is arranged between the boat ears on both sides of the two middle inner boat pages, and a graphite block 8 is used to fix the interval between the boat ears on both sides of the remaining parts. Both the electrode block 9 and the graphite block 8 are provided with reserved holes for passing the graphite rod 6.

[0042] During specific implementation, the grooves reserved in the lower boat page correspond to the specifications of the silicon wafers, the grooves reserved in the inner boat page correspond to the specifications of the silicon wafers, and the number of wafers in the inner boat page is designed according to the size of the furnace tube.

[0043] During specific implementation, threads are reserved on both sides of the ceramic rod. The ceramic rod passes through the upper boat page, multiple inner boat pages and the lower boat page in turn and is fixed with a graphite nut. The discharge uses a graphite block to connect the electrode rod. During specific implementation, the boat ears on both sides are connected with a graphite rod. Threads are reserved at both ends of the graphite rod. The rod passes through the boat ears of the upper boat page, multiple inner boat pages and the lower boat page in turn and is fixed with a graphite nut.

[0044] Example 2

[0045] This embodiment provides a clamping device for a flat-laid graphite boat of a post-textured back-contact battery, using the flat-laid graphite boat of the post-textured back-contact battery in Example 1, and the clamping device includes:

[0046] Upper border 14;

[0047] A lower frame 16, the lower frame 16 is located at the lower side of the upper frame 14;

[0048] A side frame 15, one end of the side frame 15 is connected to the upper frame 14, and the other end of the side frame 15 is connected to the lower frame 16;

[0049] A plurality of retractable clamping components 10 are disposed on the upper frame 14 , the lower frame 16 and the side frame 15 for fixing the graphite boat 1 .

[0050] In specific implementation, the width of the clamping device is designed according to the width of the graphite boat used, and there is a gap between the clamping device and the graphite boat to allow the graphite boat to enter and exit the boat smoothly.

[0051] In this embodiment, the upper frame 14, the lower frame 16 and the side frame 15 are all provided with a plurality of hollow portions for reducing the overall weight.

[0052] In this embodiment, the retractable clamping assembly 10 includes:

[0053] A retractable clamping block, the retractable clamping block is located on a side close to the graphite boat 1;

[0054] A compressed air pipeline, one end of which is connected to the retractable clamping block, and the other end of which is connected to the air compressor.

[0055] In this embodiment, a grating sensor is provided on one side of the retractable clamping block, the grating sensor is electrically connected to a controller, and the controller is electrically connected to the air compressor.

[0056] In specific implementation, after the graphite boat enters the channel position, the grating sensor to the transmission motion belt stops, the air compressor is turned on, and the retractable clamping block is pressed down by compressed air to fix the graphite boat;

[0057] In the specific implementation, the number and position of the clamping block and the graphite boat ceramic rod 7 and the ceramic block 2 correspond to ensure that the boat as a whole will not be deformed after clamping and pressing down to prevent crushing and deformation;

[0058] Working principle: the graphite boat is assembled, put on line after cleaning and saturation, the graphite boat enters the clamping channel, the telescopic clamping block is pressed down and fixed, the suction teeth 12 of the manipulator 11 descend to be parallel to the gap between the boat pages, and slowly inserted into the gap between the boat pages, and the wafer is placed after reaching the reserved groove of the silicon wafer 13. After the whole boat is filled, the clamping and lifting are lifted, the boat is withdrawn from the transmission channel, and the graphite boat enters the main machine. The main machine manipulator grabs the boat and puts it on the corresponding furnace tube paddle, and then puts the graphite boat into the furnace tube through the paddle. The graphite electrode block put into the furnace tube is connected with the electrode rod in the tube, and the furnace door is closed for process. After the process, the graphite boat is pulled out through the paddle, and the manipulator 11 grabs the boat and puts it into the transmission channel. The transmission channel enters the boat, and after entering the boat, it reaches the grating sensor and stops, the clamping block is pressed down, and the manipulator unloads the wafer.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A flat-laid graphite boat for a post-textured back contact battery, comprising: An upper boat page, a lower boat page, a plurality of inner boat pages located between the upper boat page and the lower boat page, and electrodes, characterized in that: The upper boat page, the lower boat page and the inner boat page are all solid boat pages, and the lower boat page and the inner boat page are both reserved with grooves, and the grooves are used to fix the silicon wafers in the boat.

2. The flat-laid graphite boat of the post-textured back contact battery according to claim 1, characterized in that: A plurality of vacuum reserved holes are arranged at the center of the groove.

3. The flat-laid graphite boat of the post-textured back contact battery according to claim 1, characterized in that: A plurality of ceramic pads are arranged between two adjacent boat leaves, and the ceramic pads are provided with reserved holes for passing the ceramic rods.

4. The flat-laid graphite boat of the post-textured back contact battery according to claim 1, characterized in that: The bottom end of the lower boat page is provided with a ceramic foot.

5. The flat-laid graphite boat of the post-textured back contact battery according to claim 1, characterized in that: Electrode blocks are arranged between the boat ears on both sides of the two middle inner boat pages, and graphite blocks are used to fix the intervals between the boat ears on both sides of the remaining parts. Pre-set holes are arranged on the electrode blocks and the graphite blocks for passing the graphite rods.

6. A clamping device for a flat-lay graphite boat of a post-textured back contact battery, characterized in that: The flat-laid graphite boat of the post-textured back-contact battery according to any one of claims 1 to 5, wherein the clamping device comprises: Top border; A lower frame, the lower frame being located at the lower side of the upper frame; A side frame, one end of which is connected to the upper frame, and the other end of which is connected to the lower frame; Wherein, a plurality of retractable clamping components are arranged on the upper frame, the lower frame and the side frame for fixing the graphite boat.

7. The clamping device for a flat-lay graphite boat of a post-textured back contact battery according to claim 6, characterized in that: The upper frame, the lower frame and the side frame are each provided with a plurality of hollow portions for reducing the overall weight.

8. The clamping device for a flat-lay graphite boat of a post-textured back contact battery according to claim 6, characterized in that: The retractable clamping assembly comprises: A retractable clamping block, wherein the retractable clamping block is located on a side close to the graphite boat; A compressed air pipeline, one end of which is connected to the retractable clamping block, and the other end of which is connected to the air compressor.

9. The clamping device for a flat-lay graphite boat of a post-textured back-contact battery according to claim 8, characterized in that: A grating sensor is arranged on one side of the retractable clamping block, the grating sensor is electrically connected to a controller, and the controller is electrically connected to the air compressor.

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