Passivation boat frame and passivation boat

Abstract

The passivation boat frame comprises a first boat frame and a second boat frame, the first boat frame comprises a first electrode plate and a second electrode plate which are isolated from each other, and the second electrode plate is provided with a plurality of drainage holes. A loading frame body in the second boat frame is in electric insulation connection with the first electrode plate and is in electric conduction connection with the second electrode plate; the passivation boat frame is provided with the first electrode plate and the second electrode plate which are opposite in potential, so that alternating electric fields are formed between the first electrode plate and the second electrode plate and between the first electrode plate and the top edge surface of the battery piece group in the passivation piece box, and process gas generates plasma between the first electrode plate and the top edge surface of the battery piece group. And the plasma between the first electrode plate and the second electrode plate is drained and deposited on the top edge surface of the battery piece group in the passivation piece box through the drainage holes of the second electrode plate, so that superposed coating passivation is realized, the coating speed of the passivation boat on the battery pieces is accelerated, and the coating efficiency of the passivation boat is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of coating technology, more specifically, relates to a passivation boat and passivation boat. BACKGROUND

[0002] With the development of photovoltaic industry, the crystal silicon cell technology is updated and iterated. In the battery assembly production link, the whole battery piece is divided into two pieces or multiple small pieces through laser splitting technology, the battery assembly is reduced in series current, the power loss of reducing series resistance is realized, and it is one of important and effective ways for improving the power of photovoltaic assembly.

[0003] However, laser splitting is accompanied by the influence on the conversion efficiency of battery piece. The carrier recombination of the new cutting surface (i.e. unpassivated surface) of battery piece is more obvious, and the edge recombination has more significant influence on the conversion efficiency for high-efficiency battery. In order to eliminate or reduce the conversion efficiency loss of battery caused by laser lossless cutting (TLS) cutting, the edge passivation technology is used to solve the problem.

[0004] To this end, in order to reduce and eliminate the conversion efficiency loss of battery caused by laser splitting when adopting half-piece technology in the assembly link, the edge passivation technology is used to solve the problem. At present, various edge passivation technologies in the industry are still in the small-scale verification stage, and manufacturers are actively exploring a new process equipment that can be stably put into mass production to realize the further improvement of the conversion efficiency of battery piece. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a passivation boat frame and passivation boat to solve the problem of low efficiency in the prior art when passivating and coating the cutting edge of battery piece.

[0006] To achieve the above object, the utility model adopts the technical scheme that:

[0007] The utility model discloses first propose a passivation boat frame, including detachable connection's first boat frame and first boat frame and second boat frame,

[0008] The first boat frame includes the first electrode plate and the second electrode plate that are isolated from each other, and the second electrode plate is provided with a plurality of drainage holes corresponding to a plurality of passivation piece boxes;

[0009] The second boat frame includes a loading rack body for loading a plurality of passivation piece boxes, and the loading rack body is electrically insulatedly connected with the first electrode plate, and the loading rack body is electrically conductively connected with the second electrode plate.

[0010] The potential of the first electrode plate and the second electrode plate is opposite, and the second electrode plate, the second boat frame and the passivation piece box are at the same potential.

[0011] Further, the loading frame body is provided with a plurality of insulating supports for supporting the first electrode plate and a plurality of conductive supports for supporting the second electrode plate.

[0012] Further, the first electrode plate is provided with a first power connection plug, the loading frame body is provided with a second power connection plug, and the first power connection plug and the second power connection plug are located at the same end or opposite ends of the passivation boat.

[0013] Further, the loading frame body comprises a pair of side plates and a pair of supports which jointly enclose a loading space, the insulating supports and the second power connection plug are arranged on one of the supports, and the conductive supports are arranged on the other support.

[0014] Further, the first electrode plate is provided with a plurality of insulating connectors corresponding to the plurality of insulating supports, and the second electrode plate is provided with a plurality of conductive connectors corresponding to the plurality of conductive supports.

[0015] Further, the distance between the first electrode plate and the second electrode plate is 10-50mm.

[0016] Further, the first electrode plate is provided with a grabbing and positioning assembly on the side away from the second electrode plate, and the grabbing and positioning assembly comprises a plurality of crossbeams arranged on the first electrode plate and a plurality of grabbing blocks arranged between the crossbeams.

[0017] Further, the loading frame body is provided with a conductive belt in the loading space.

[0018] Further, the loading frame body is provided with a plurality of positioning groove groups for clamping a plurality of passivation box.

[0019] The utility model also provides a passivation boat, which comprises the passivation boat frame as described above and a plurality of passivation boxes placed in the passivation boat frame.

[0020] Compared with the prior art, the passivation boat frame and the passivation boat have the following beneficial effects: the first electrode plate and the second electrode plate with opposite electric potentials are arranged on the passivation boat frame, so that an alternating electric field is formed between the first electrode plate and the second electrode plate and between the first electrode plate and the top edge surface of the battery piece group in the passivation box, plasma is generated in the process gas, the drainage hole of the second electrode plate can guide the plasma between the first electrode plate and the second electrode plate to deposit on the top edge surface of the battery piece group in the passivation box, and the deposition is superimposed, the film plating speed of the passivation boat on the battery piece is accelerated, and the film plating efficiency of the passivation boat is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to make the technical problems, technical schemes and beneficial effects of the present application clearer, further detailed description will be made to the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0022] Figure 1 Structure diagram of the passivation boat in the present application;

[0023] Figure 2 Structure diagram of the passivation boat frame in the present application;

[0024] Figure 3 Structure diagram of the first boat frame in the present application;

[0025] Figure 4 Structure diagram of the second boat frame in the present application;

[0026] In the drawings, the main marks are as follows:

[0027] 1, passivation boat; 2, passivation boat frame; 3, passivation wafer box; 4, first boat frame; 5, second boat frame; 6, first electrode plate; 7, second electrode plate;

[0028] 10, second power connection plug; 11, conductive belt; 12, rear side plate; 13, front side plate; 14, left support; 15, right support; 16, insulating support; 17, conductive support; 18, first power connection plug; 19, conductive connecting piece; 20, insulating connecting piece; 21, insulating fastener; 22, first grabbing block; 23, second grabbing block; 24, cross beam; 25, connecting rod; 26, positioning groove group; 27, drainage hole. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical schemes and beneficial effects of the present application clearer, further detailed description will be made to the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0030] The present application relates to a kind of for the production link of crystalline silicon battery, after adopting laser piece, the equipment for the cutting edge passivation film of new cell piece of whole cell piece.

[0031] As Figure 1As shown, the passivation boat 1 proposed by the utility model is composed of a passivation boat frame 2 and a passivation sheet box 3. The passivation sheet box 3 can load a plurality of battery sheets at a time, and at this time, the plurality of battery sheets are vertically stacked and placed inside the passivation sheet box 3. For the convenience of description, the plurality of battery sheets inside the passivation sheet box 3 will be referred to as a battery sheet group in the following, and the passivation boat frame 2 can load a plurality of passivation sheet boxes 3 at a time.

[0032] As shown in the figure, Figure 2 The passivation boat frame 2 includes a first boat frame 4 and a second boat frame 5 which are detachably connected.

[0033] As shown in the figure, Figure 2 , Figure 3 The first boat frame 4 includes a first electrode plate 6 and a second electrode plate 7 which are isolated from each other, and the second electrode plate 7 is provided with a plurality of drainage holes 27 corresponding to a plurality of passivation sheet boxes 3. The first electrode plate 6 and the second electrode plate 7 can be parallel or approximately parallel.

[0034] As shown in the figure, Figure 2 , Figure 3 , Figure 4 The second boat frame 5 includes a loading frame body for loading a plurality of passivation sheet boxes 3. The loading frame body is electrically insulated from the first boat frame 4 and is electrically conductive with the second electrode plate 7.

[0035] The potential of the first electrode plate 6 and the second electrode plate 7 is opposite, and the second electrode plate 7, the second boat frame 5 and the passivation sheet box 3 are at the same potential.

[0036] It should be understood that if the first electrode plate 6 has a positive potential, the second electrode plate 7 has a negative potential; conversely, if the first electrode plate 6 has a negative potential, the second electrode plate 7 has a positive potential.

[0037] The passivation boat frame 2 proposed by the utility model is provided with the first electrode plate 6 and the second electrode plate 7 with opposite potentials, so that an alternating electric field is formed between the first electrode plate 6 and the second electrode plate 7 and between the top edge surface of the battery sheet group in the passivation sheet box 3 and the first electrode plate 6. The process gas generates plasma therebetween, and at the same time, the drainage holes 27 of the second electrode plate 7 can guide the plasma between the first electrode plate 6 and the second electrode plate 7 to deposit on the top edge surface of the battery sheet group in the passivation sheet box 3, so as to realize the superposition plating passivation, accelerate the plating speed of the passivation boat 1 on the battery sheet, improve the plating efficiency of the passivation boat 1, and facilitate the realization of the large-batch edge passivation plating of the battery sheet.

[0038] Further preferably, the first electrode plate 6 is provided with a first power connection plug 18, and the loading frame body is provided with a second power connection plug 10. The loading frame body is also provided with a plurality of insulating supports 16 for supporting the first electrode plate 6 and a plurality of conductive supports 17 for supporting the second electrode plate 7.

[0039] It should be noted that after the passivation boat 1 is placed into the coating reaction chamber, its two ends face the front flange and rear flange of the chamber, respectively, and then process gas is introduced into the coating reaction chamber. Conductive connection is achieved by the first electrical connector 18 in the passivation boat frame 2 engaging with the third electrical connector in the coating reaction chamber, thus directly connecting the first electrode plate 6 of the passivation boat frame 2 to the third electrical connector in the coating reaction chamber. Indirect electrical connection is achieved by the second electrical connector 10 in the passivation boat frame 2 engaging with the fourth electrical connector in the coating reaction chamber, thus indirectly connecting the second electrode plate 7 of the passivation boat frame 2 to the fourth electrical connector in the coating reaction chamber. Furthermore, the passivation plate box 3, the second boat frame 5, and the second electrode plate 7 are at the same potential. Since the potentials of the third and fourth electrical connectors are opposite, the potentials of the first electrode plate 6 and the second electrode plate 7 are also opposite.

[0040] It should also be noted that the first power connector 18 and the second power connector 10 can be plug sockets, while the third and fourth power connectors can be plug rods; or the first power connector 18 and the second power connector 10 can be plug rods, while the third and fourth power connectors can be plug sockets.

[0041] More preferably, such as Figure 3 , Figure 4 As shown, the first electrical connector 18, the second electrical connector 10, and the insulating support 16 are located at the same end of the passivation frame 2, while the second electrical connector 10 and the conductive support 17 are located at opposite ends of the passivation frame 2.

[0042] This invention also considers that the potential of the third electrical connector in the coating reaction chamber is weakened near the front flange of the cavity due to the long conduction distance of the first electrode plate 6. That is, the potential of the first electrode plate 6 gradually weakens from the end near the first electrical connector 18 to the end away from it. The above design of this invention allows the potential of the second electrode plate 7 to gradually increase from the end near the conductive support 17 to the end away from it, compensating for the weaker potential of the first electrode plate 6 at the end away from the first electrical connector 18. This results in a uniform electric field being generated in the passivation boat 1 within the coating reaction chamber from the end near the rear flange of the cavity to the end near the front flange of the cavity, achieving uniform coating on the top edge surface of the battery cell assembly within the passivation cell box 3. This preferred embodiment allows for uniform coating while simultaneously placing the first electrical connector 18 and the second electrical connector 10 at the same end of the passivation boat frame 2.

[0043] It should be noted that in other optional embodiments, the first power connection plug 18 and the second power connection plug 10 can also be arranged at opposite ends of the passivation boat 2, and the second power connection plug 10 is located at the same end of the conductive support 17 of the passivation boat 2. This design can also compensate for the defect that the electric potential of the first electrode plate 6 is weaker at the end far from the first power connection plug 18, so that the passivation boat 1 generates a uniform strength electric field in the coating reaction chamber from the end close to the rear flange of the chamber to the end close to the front flange of the chamber, and realizes uniform coating of the top edge surface of the battery sheet group in the passivation sheet box 3.

[0044] Further preferably, as shown in Figure 3 , Figure 4 The first electrode plate 6 is provided with a plurality of insulating connecting pieces 20 for one-to-one corresponding connection and cooperation with the plurality of insulating supports 16, and the second electrode plate 7 is provided with a plurality of conductive connecting pieces 19 for one-to-one corresponding connection and cooperation with the plurality of conductive supports 17.

[0045] It should be understood that the number of insulating connecting pieces 20 and conductive connecting pieces 19 can be set to but not limited to two; similarly, the number of insulating supports 16 and conductive supports 17 can be set to but not limited to two. The insulating connecting pieces 20 and the insulating supports 16 are made of insulating materials, and through the connection and cooperation between the insulating connecting pieces 20 and the insulating supports 16, the first electrode plate 6 in the first boat 4 and the second boat 5 are connected and supported in position and electrically insulated. The conductive connecting pieces 19 and the conductive supports 17 are made of conductive materials, and through the connection and cooperation between the conductive connecting pieces 19 and the conductive supports 17, the second electrode plate 7 in the first boat 4 and the second boat 5 are connected and supported in position and electrically conductive. The connection mode between the insulating connecting pieces 20 and the insulating supports 16, and the connection mode between the conductive connecting pieces 19 and the conductive supports 17 can be clamping connection, bolt connection or pin shaft connection, etc.

[0046] In actual application, after the passivation sheet box 3 is loaded, the first boat 4 is covered on the second boat 5, and the first boat 4 and the second boat 5 are supported, insulated and conductive to each other through the insulating or conductive supports and connecting pieces on the bodies thereof.

[0047] Further preferably, as shown in Figure 3 The first electrode plate 6 and the second electrode plate 7 are fixedly connected by a plurality of insulating fasteners 21.

[0048] It should be understood that the insulating fastener 21 not only fixes the first electrode plate 6 and the second electrode plate 7 together, but also isolates the first electrode plate 6 and the second electrode plate 7. The insulating fastener 21 has a ceramic spacer sleeve to isolate the first electrode plate 6 and the second electrode plate 7.

[0049] In actual application, the first electrode plate 6 and the second electrode plate 7 are respectively connected to two electrical connection plugs in the coated reaction cavity, and after being connected to the radio frequency power supply, a high frequency alternating electric field is generated between the first electrode plate 6 and the second electrode plate 7, so that the process gas between the first electrode plate 6 and the second electrode plate 7 generates plasma, and then the top edge surface of the battery piece group at the same potential as the second electrode plate 7 realizes plasma chemical vapor deposition coating.

[0050] Further preferably, the distance between the first electrode plate 6 and the second electrode plate 7 is 10-50 mm. In addition, the distance between the top edge surface of the battery piece group in the passivation box 3 and the second electrode plate 7 can also be 10-50 mm after the passivation box 3 is placed inside the passivation boat 2. In actual application, when the distance between the first electrode plate 6 and the second electrode plate 7 is 20 mm, and the distance between the top edge surface of the battery piece group in the passivation box 3 and the second electrode plate 7 is 20 mm, the coating efficiency of the passivation boat 1 is better.

[0051] Further preferably, the second electrode plate 7 has a drainage hole 27 above each passivation box 3, and the shape of the drainage hole 27 is square, and the size of the drainage hole 27 is greater than or equal to the length and width of the overall top edge surface of the battery piece group in the passivation box 3. Of course, in other optional embodiments, the shape of the drainage hole 27 can also be oval, rhombus or irregular shape, etc., and the size of the drainage hole 27 is greater than or equal to the length and width of the overall top edge surface of the battery piece group in the passivation box 3. The drainage hole 27 can guide the plasma between the first electrode plate 6 and the second electrode plate 7 to deposit on the top edge surface of the battery piece group in the passivation box 3, so as to realize superimposed coating passivation.

[0052] Further preferably, as shown in Figure 3 the first electrode plate 6 is provided with a grabbing and positioning assembly on the side away from the second electrode plate 7, and the grabbing and positioning assembly comprises a plurality of cross beams 24 arranged at intervals on the first electrode plate 6, and a plurality of grabbing blocks arranged at intervals between the plurality of cross beams 24.

[0053] It should be understood that the number of cross beams 24 is preferably two, and the number of grabbing blocks can be set to but not limited to two. The first grabbing block 22 and the second grabbing block 23 are respectively arranged at positions close to the two ends of the first electrode plate 6. By arranging the cross beams 24 and the grabbing blocks on the first boat 4, the mechanical hand is convenient to position and grab. In the automatic loading and unloading of the passivation box 3, the first boat 4 can be grabbed and placed on the second boat 5 by the mechanical hand.

[0054] Further preferably, as shown in Figure 4 the loading rack body comprises a pair of side plates and a pair of supports which jointly enclose a loading space, the insulating support 16 and the second electrical connection plug 10 are arranged on one of the supports, and the conductive support 17 is arranged on the other support.

[0055] Specifically, the pair of side plates includes a front side plate 13 and a rear side plate 12 arranged symmetrically, and the pair of supports includes a left support 14 and a right support 15 arranged symmetrically. The left support 14 is connected to the left ends of the front side plate 13 and the rear side plate 12, and the right support 15 is connected to the right ends of the front side plate 13 and the rear side plate 12. A loading space capable of loading a plurality of passivation boxes 3 is formed by the left support 14, the front side plate 13, the right support 15, and the rear side plate 12. At the same time, two insulating supports 16 are arranged on the left support 14, and the second electrical connection plug 10 is also arranged on the left support 14, and two conductive supports 17 are arranged on the right support 15.

[0056] Further preferably, as shown in Figure 4 The conductive strip 11 is arranged in the loading space of the loading frame body, and the conductive strip 11 is connected to the pair of supports (i.e., the left support 14 and the right support 15).

[0057] It should be understood that the conductive strip 11 is made of a material with good electrical conductivity, and the conductive strip 11 is laid on the bottom of the second boat 5, which can enhance the electrical conductivity of the entire second boat 5.

[0058] Further preferably, as shown in Figure 4 The pair of side plates (i.e., the front side plate 13 and the rear side plate 12) are fixedly connected by a plurality of connecting rods 25.

[0059] It should be understood that the number of connecting rods 25 can be set to but not limited to 5. By adding a plurality of connecting rods 25 to fix the pair of side plates together, the stability and reliability of the entire second boat 5 can be enhanced.

[0060] Further preferably, as shown in Figure 4 A plurality of positioning groove groups 26 for clamping a plurality of passivation boxes 3 are arranged on the loading frame body. The plurality of positioning groove groups 26 are preferably arranged on a pair of side plates in the loading frame body.

[0061] It should be understood that each positioning groove group 26 is composed of 4 positioning grooves, two of which are arranged on one side plate (i.e., the front side plate 13), and the other two are arranged on the other side plate (i.e., the rear side plate 12). The passivation box 3 is provided with four electrode rods, which are evenly installed on both sides of the box body. When the passivation box 3 filled with battery pieces is loaded into the second boat 5 of the passivation boat 2, the second boat 5 can load a plurality of passivation boxes 3 at a time. At this time, the four electrode rods in the passivation box 3 are clamped in the four positioning grooves of the second boat 5, which form a positioning groove group 26, and the passivation box 3 and the second boat 5 form an electrical conduction, so that the passivation box 3 and the second boat 5 are at the same potential.

[0062] The utility model discate that the first electrode plate 6 and the second electrode plate 7 are increased on the basis of being provided with the first electrode plate 6 to the passivation boat 1, make the first electrode plate 6 and the second electrode plate 7 between, the first electrode plate 6 and the top edge surface between the battery piece group in the passivation piece box 3 produce the superimposed plasma between, realize superimposed coating passivation, speed up the coating speed of passivation boat 1 to battery piece, improve the coating efficiency of passivation boat 1.

[0063] The unique passivation boat structure of the utility model can be adapted to carry out high-efficiency mass, controllable ALD+PECVD process various passivation films on the edge of battery piece, and realizes the industrialization of the edge passivation coating of battery piece half piece. The utility model has the advantages of stable process, excellent passivation film, high coating efficiency, compatible coating types, low manufacturing cost and the like.

[0064] The above is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A passivated boat frame, characterized in that, Includes a detachably connected first and second hull frame; The first boat frame includes a first electrode plate and a second electrode plate that are isolated from each other, and the second electrode plate has a plurality of drainage holes corresponding to a plurality of passivation cassettes; The second boat frame includes a loading frame for loading the plurality of passivation cassettes, the loading frame being electrically insulated from the first electrode plate and electrically connected to the second electrode plate; The first electrode plate and the second electrode plate have opposite potentials, while the second electrode plate, the second boat frame, and the passivation cassette are at the same potential.

2. The passivated boat frame as described in claim 1, characterized in that, The loading frame is provided with multiple insulating supports for supporting the first electrode plate and multiple conductive supports for supporting the second electrode plate.

3. The passivated boat frame as described in claim 2, characterized in that, The first electrode plate is provided with a first power connector, and the loading frame is provided with a second power connector. The first power connector and the second power connector are located at the same end or opposite ends of the passivation boat frame.

4. The passivated boat frame as described in claim 3, characterized in that, The loading frame includes a pair of side plates and a pair of brackets that together form a loading space. The insulating support and the second electrical connector are mounted on one of the brackets, and the conductive support is mounted on the other bracket.

5. The passivated boat frame as described in claim 2, characterized in that, The first electrode plate is provided with a plurality of insulating connectors for corresponding connection and cooperation with the plurality of insulating support members, and the second electrode plate is provided with a plurality of conductive connectors for corresponding connection and cooperation with the plurality of conductive support members.

6. The passivated boat frame as described in claim 1, characterized in that, The distance between the first electrode plate and the second electrode plate is 10-50 mm.

7. The passivated boat frame as described in claim 1, characterized in that, A gripping and positioning component is provided on the side of the first electrode plate facing away from the second electrode plate. The gripping and positioning component includes a plurality of crossbeams spaced apart on the first electrode plate and a plurality of gripping blocks spaced apart between the plurality of crossbeams.

8. The passivated boat frame as described in claim 4, characterized in that, The loading frame is equipped with a conductive strip within the loading space.

9. The passivated boat frame as described in any one of claims 1 to 4, characterized in that, The loading frame is provided with multiple positioning slots for securing the multiple passivation cassettes.

10. A passivated boat, characterized in that, It includes a passivation boat frame as described in any one of claims 1 to 9, and a plurality of passivation cassettes placed inside the passivation boat frame.

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