Battery piece material box

Abstract

The utility model relates to the technical field of solar cell production, and discloses a cell box. The battery piece material box comprises a box body and a cover body. The box body is provided with an accommodating cavity for accommodating the stacked battery pieces and an opening communicated with the accommodating cavity. The box body comprises a bottom wall and side walls which are connected, and the side walls define a containing cavity on the bottom wall. A plurality of through holes are formed in the side wall, one end of each through hole is communicated with the outside, and the other end of each through hole is communicated with the accommodating cavity and faces the plane where the cutting edges of the stacked battery pieces are located. The cover body covers and seals the opening. According to the battery piece material box provided by the invention, the processing yield of the battery pieces collected in the material box can be improved.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of solar cell production, in particular to a cell piece box. BACKGROUND

[0002] With the continuous development of photovoltaic technology, the production and installed capacity of photovoltaic modules are also increasing. Photovoltaic modules use the photoelectric effect of semiconductors to convert absorbed light energy into electrical energy, thereby providing an energy source for the production and operation of industrial society. The cell piece is an important part of the photovoltaic module, which is a semiconductor wafer formed by processing a silicon wafer that can convert solar light energy into electrical energy.

[0003] In the production process of the cell piece, the cell piece is collected by the box to perform the half-cell cutting surface passivation process. After the box is filled with half-cells, an air inlet gap is reserved at the opening, so that process gas can enter the box to passivate and coat the cutting surface of the half-cell to improve the efficiency of the cell piece. However, this air inlet structure can cause the front and back surfaces of the cell piece to appear around the poor plating phenomenon, affecting the processing yield of the cell piece. Therefore, how to design the box to improve the processing yield of the cell piece collected in the box is an important problem. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiment of the present application is to provide a cell piece box which can improve the processing yield of the cell piece collected in the box.

[0005] To solve the above technical problems, the embodiment of the present application provides a cell piece box. The cell piece box comprises a box body and a cover. The box body is provided with a containing cavity for accommodating stacked cell pieces, and an opening communicating with the containing cavity. The box body comprises a bottom wall and a side wall connected to each other, and the side wall surrounds the containing cavity on the bottom wall. The side wall is provided with a plurality of through holes, one end of each through hole communicates with the outside, and the other end of each through hole communicates with the containing cavity and faces a plane where the cutting edges of the stacked cell pieces are located. The cover covers and seals the opening.

[0006] The cell piece box provided by the embodiment of the present application is provided with through holes on the side wall for process gas to enter. The end of the through hole communicating with the containing cavity faces the plane where the cutting edges of the stacked cell pieces are located, which facilitates the process gas to reach the cutting surface of the cell piece. When the cell pieces accommodated uniformly are coated by taking the box as a carrier, the proportion of the poor plating around the cell piece can be reduced. Thus, the processing yield of the cell piece is improved.

[0007] In some embodiments, the plurality of through holes are distributed on the same plane, and the plurality of through holes are arranged in an array on the side wall. In this way, by distributing the plurality of through holes in a more uniform form, the uniformity of the process gas entering the box from the through holes can be ensured.

[0008] In some embodiments, the diameter of each through hole is 0.5-2 mm. In this way, by setting the diameter of the through hole within a certain range, it can be avoided that the gas inlet amount is insufficient due to the small diameter of the through hole, and thus the plating film is not sufficient; it can also be avoided that the gas inlet amount is too large due to the large diameter of the through hole, and thus the plating film is not sufficient.

[0009] In some embodiments, the spacing between two adjacent through holes is 20-25 mm. In this way, by keeping the spacing between the through holes within a certain range, it can be avoided that the process gas is insufficiently distributed in the local area due to the large spacing between the through holes, and it can also be avoided that the process gas is concentrated in part of the area due to the small spacing between the through holes.

[0010] In some embodiments, the side wall comprises a first side wall and a second side wall arranged oppositely, the first side wall is adjacent to the cutting edge of the cell sheet, the second side wall is adjacent to the non-cutting edge of the cell sheet, the area of the first side wall is larger than that of the second side wall, and the first side wall is provided with a through hole. In this way, by arranging the through hole on the first side wall with a larger area, a sufficient area can be provided for the arrangement of the through hole, and it is also convenient to confirm the stacking direction of the cell sheet.

[0011] In some embodiments, the first side wall and the bottom wall have a spacing therebetween. In this way, the spacing between the first side wall and the bottom wall can facilitate the quick discharge of gas from the box body.

[0012] In some embodiments, the box body further comprises a supporting piece movably arranged on the bottom wall, and a surface of the supporting piece away from the bottom wall is a supporting surface for carrying the cell sheet. In this way, by movably arranging the supporting piece, it is convenient to take out the cell sheet after the processing of the cell sheet is completed.

[0013] In some embodiments, the supporting surface is inclined relative to the direction of the opening, and the distance between the supporting surface and the opening gradually decreases in the direction close to the through hole. In this way, by setting the supporting surface with an inclination angle, the height difference of the stacked cell sheet on the cutting edge side can be adapted.

[0014] In some embodiments, the bottom wall is provided with a central hole, a surface of the supporting piece is provided with a protruding portion protruding away from the supporting surface, and the protruding portion is engaged with the central hole. In this way, by setting the shaft hole engagement structure, the cooperation form between the supporting piece and the bottom wall can be simplified.

[0015] In some embodiments, the bottom wall is provided with a plurality of hollowed-out areas, and the plurality of hollowed-out areas are distributed on both sides of the central hole. In this way, the hollowed-out areas can provide a space for the lifting of the supporting piece, ensuring the smooth taking out of the cell sheet.

[0016] In some embodiments, the side wall is provided with a clamping piece away from one side of the containing cavity, and the clamping piece is used for clamping by the mechanical hand. In this way, the clamping piece can be provided to facilitate the automatic transfer of the overall position of the box. BRIEF DESCRIPTION OF DRAWINGS

[0017] One or more embodiments are illustrated by way of example in the figures that form a part of this disclosure and which do not limit the scope of embodiments, in which like references indicate similar elements. Figures in the drawings are not necessarily to scale, the emphasis instead being placed upon illustrating the principles of embodiments.

[0018] Figure 1 is a perspective structural schematic view of a battery piece box loaded with battery pieces according to some embodiments of the present application;

[0019] Figure 2 is a front structural schematic view of a box body in a battery piece box according to some embodiments of the present application;

[0020] Figure 3 is a top structural schematic view of a box body in a battery piece box according to some embodiments of the present application;

[0021] Figure 4 is a top structural schematic view of a box body in a battery piece box according to some embodiments of the present application;

[0022] Figure 5 is a side structural schematic view of a supporting piece in a battery piece box according to some embodiments of the present application. DETAILED DESCRIPTION

[0023] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that in the embodiments of the present application, many technical details are proposed in order to make the readers better understand the present application. However, the technical solutions claimed by the present application can be realized even without these technical details and various changes and modifications based on the following embodiments. The division of the following embodiments is for the convenience of description, and should not constitute any limitation on the specific embodiments of the present application, and the embodiments can be combined with each other and cited to each other without contradiction.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the description and the claims of this application and the above description of drawings, the terms "comprising" and "having" and any variations thereof, are intended to cover not exclusively inclusive.

[0025] In the description of the embodiments of the present application, unless specifically defined and limited otherwise, the technical terms "mounting", "connecting", "connecting" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0026] With the increasing demand for photovoltaic modules, the production efficiency of the cell pieces is also continuously improved. During the production process of the cell pieces, the cell pieces will undergo a half-cell cutting surface passivation process, which requires the use of a box to collect the cell pieces, and the box is used as a carrier to perform the half-cell cutting surface passivation process.

[0027] During the process of passivating the cutting surface (the side wall surface formed after cutting) of the half-cell after the cell pieces are cut, a gap with a width of more than 0.3 mm reserved at the opening of the box is used as an inlet channel for the process gas. That is, the opening of the box is not completely closed, but a gap with a certain width is reserved. However, the opening direction is consistent with the stacking direction of the cell pieces, which makes the gas inlet direction point to the front and back surfaces of the cell pieces, and the front and back surfaces of the cell pieces are prone to poor plating due to the gas inlet gap. In actual situations, when the gas inlet direction points from the back surface to the front surface of the cell piece, the proportion of poor plating on the back surface of the cell piece exceeds 0.2%, and the proportion of poor plating on the front surface of the cell piece exceeds 0.05%. When the gap width reserved at the opening of the box is less than 0.3 mm, it will lead to insufficient gas inlet and insufficient film plating on the cutting surface of the cell piece.

[0028] The specific processing process of the cell piece during the cutting surface passivation is as follows: after the cutting machine cuts the whole cell into half, the cell piece enters the loading port of the passivation machine, and the robot in the regular area takes the cell piece and puts it into the regular device. The regular device regularizes the half-cell into the box, and one box can hold about 860 cell pieces. After the box is filled with cell pieces, the cover plate is covered, and a gap with a certain width is reserved. After covering the cover plate, the box is turned over by 90 degrees so that the cutting surface of the cell piece faces upwards, i.e. the cutting edge of the cell piece is located above. The box is inserted into a small boat by a robot, and each small boat can insert 12 boxes. Every two boats are stacked on a boat, and then enter the reaction chamber of the passivation machine. After the passivation machine is heated, the process gas is introduced to perform the film plating process. Due to the gap reserved at the opening of the box, the process gas can enter the box horizontally from the gap. However, the gas inlet direction of the process gas points to the front and back surfaces of the cell piece, which will cause the front and back surfaces of the cell piece to appear poor plating.

[0029] In order to improve the processing yield of the battery pieces collected in the box, some embodiments of the present application provide a battery piece box. The battery piece box is provided with through holes on the side wall to provide a channel for the process gas to enter the box and passivate the cutting surface of the battery piece. When the battery pieces are regularly stacked in the box, the cutting surface of the battery piece faces the part of the side wall where the through hole is formed. In this way, when the cutting surface of the battery piece is passivated by taking the box as the carrier, the entering direction of the process gas points to the cutting surface of the battery piece at the cutting edge. That is, the process gas can vertically enter the box through the through hole and act on the cutting surface of the battery piece. Thus, the phenomenon of poor plating around the front and back surfaces of the battery piece is reduced, and the overall poor plating ratio of the battery piece can be reduced to 0.01%.

[0030] The structure of the battery piece box provided by some embodiments of the present application will be described below. Figures 1 to 5 The structure of the battery piece box provided by some embodiments of the present application will be described below.

[0031] As shown in Figures 1 to 5 some embodiments of the present application, the battery piece box comprises a box body 11 and a cover body 12. The box body 11 is provided with a receiving cavity 101 for accommodating stacked battery pieces 21, and an opening 102 communicating with the receiving cavity 101. The box body 11 comprises a bottom wall 111 and a side wall 112 connected to each other, and the side wall 112 surrounds the bottom wall 111 to form the receiving cavity 101. The side wall 112 is provided with a plurality of through holes 113, each of which communicates with the outside at one end and communicates with the receiving cavity 101 at the other end and faces the plane where the cutting edge of the stacked battery pieces 21 is located. The cover body 12 covers and seals the opening 102.

[0032] The box body 11 is a part that provides a receiving space for the battery pieces 21. The battery pieces 21 can be stacked and accommodated in the receiving cavity 101 of the box body 11 through the opening 102 of the box body 11. When the battery pieces 21 are placed, the battery pieces 21 are placed flat on the bottom wall 111 of the box body 11 and are stacked one by one. The edges of the battery pieces 21 are adjacent to the side wall 112 of the box body 11. The side wall 112 of the box body 11 is provided with the through holes 113, which penetrate the side wall 112 of the box body 11. The end of the through hole 113 communicating with the receiving cavity 101 faces the plane where the cutting edge of the stacked battery pieces 21 is located, that is, perpendicular to the cutting surface of the battery pieces 21. The through hole 113 can provide a gas entry channel for the film plating of the cutting surface of the battery pieces 21, and the cross-sectional shape of the through hole 113 can be a regular shape such as a square, a rectangle, a circle, or other irregular shapes. The through hole 113 can be in the form of equal size or variable size, and the through hole 113 can be arranged to extend in a straight line or in a curve. In addition, the side wall 112 of the box body 11 can be arranged in a regular flat plate shape or an irregular special shape. The box body 11 can be spliced from multiple separate parts or in an integral structure.

[0033] The cover 12 is the part that closes the opening 102 of the box 11. The cover 12 can close onto the opening 102 of the box 11 without requiring an air intake channel at the opening 102. That is, when the cover 12 is closed onto the box 11, it can completely close the opening 102. By closing the cover 12, the stacked battery cells 21 can be stably stored in the receiving cavity 101 of the box 11, ensuring the stability of the battery cells 21 during transfer and processing.

[0034] The battery cell cassette provided in some embodiments of this application has a through hole 113 on its side wall 112 for process gas to enter. One end of the through hole 113, which communicates with the receiving cavity 101, faces the plane containing the cut edge of the stacked battery cells 21, facilitating the process gas's access to the cut surface of the battery cells 21. When the cassette is used as a carrier to perform coating processing on the uniformly stored battery cells 21, the proportion of defective coating on the battery cells 21 can be reduced, thereby improving the processing yield of the battery cells 21.

[0035] In some embodiments, a plurality of through holes 113 may be distributed on the same plane, and the plurality of through holes 113 may be arranged in an array on the sidewall 112.

[0036] The through holes 113 are distributed on the same plane, which not only reduces the processing difficulty of the through holes 113, but also ensures the uniformity of the flow of process gas into the housing 11. The process gas can reach each through hole 113 relatively evenly on the distribution plane of the multiple through holes 113, and reach the cross-section of the battery cell 21 through each through hole 113.

[0037] like Figure 2 As shown, multiple through holes 113 can be arranged in an array on the side wall 112. The multiple through holes 113 are arranged in multiple rows and columns in a relatively uniform form, which can ensure that an appropriate amount of process gas passes through the cut surface of each battery cell 21. This ensures the coating effect of the cut surface of each battery cell 21 inside the housing 11.

[0038] In addition, the diameter of each through hole 113 can be set from 0.5 mm to 2 mm.

[0039] The diameter of the through hole 113 affects the amount of process gas entering. A smaller diameter of the through hole 113 will reduce the amount of process gas entering, and a larger diameter of the through hole 113 will increase the amount of process gas entering. By setting the diameter of the through hole 113 within a certain range, it can be ensured that the process gas enters and reaches the cutting surface of the battery piece 21 with a suitable amount. Avoiding the problem of insufficient process gas entering due to the small diameter of the through hole 113, and avoiding the problem of insufficient coating of the cutting surface of the battery piece 21. At the same time, it can also avoid the problem of excessive process gas entering due to the large diameter of the through hole 113, and avoid the problem of poor plating of the battery piece 21, and reduce the consumption of process gas. In actual cases, the diameter of the through hole 113 can be set to 0.5mm, 0.7mm, 0.9mm, 1.1mm, 1.3mm, 1.5mm, 1.7mm or 2mm.

[0040] In some embodiments, the spacing between two adjacent through holes 113 can be 20mm to 25mm.

[0041] The distribution interval between the through holes 113 affects the amount of gas in a certain area. By setting the interval between the through holes 113 within a certain range, it can be ensured that the through holes 113 form a suitable amount of process gas distribution in the area. Avoiding the problem of process gas concentrating in some areas due to the small interval between the through holes 113, and avoiding the problem of increasing the phenomenon of poor plating of some battery pieces 21. At the same time, it can also avoid the problem of lack of process gas coverage in some areas due to the large interval between the through holes 113, and avoid the problem of insufficient coating of the cutting surface of the battery piece 21. In actual cases, the spacing between two adjacent through holes 113 can be 20mm, 21mm, 22mm, 23mm, 24mm or 25mm.

[0042] In addition, in order to reduce the processing difficulty of the through hole 113, the through hole 113 can be processed on a separate plate first, and then the separate plates are spliced to form the box body 11. That is, the side wall 112 of the box body 11 can include a plurality of separated parts, and the plurality of separated parts are connected together to form a complete side wall 112.

[0043] As shown in Figure 3 The side wall 112 can include a first side wall 1121 and a second side wall 1122 arranged opposite to each other, the first side wall 1121 is adjacent to the cutting edge of the battery piece 21, the second side wall 1122 is adjacent to the non-cutting edge of the battery piece 21, the area of the first side wall 1121 is larger than that of the second side wall 1122, and the first side wall 1121 is provided with the through hole 113.

[0044] The first side wall 1121 and the second side wall 1122 correspond to the longer edges of the battery piece 21 respectively. The through hole 113 is arranged on the first side wall 1121 with a larger area, which can provide a space of sufficient size for the arrangement of the through hole 113. At the same time, the first side wall 1121 and the second side wall 1122 have different sizes, which can facilitate the determination of the placement direction of the battery piece 21. The situation that the battery piece 21 is placed in the wrong direction is effectively avoided, and the situation that the cutting surface of the battery piece 21 is not directed to the first side wall 1121 where the through hole 113 is located when the battery piece 21 is stacked is avoided.

[0045] In addition, the first side wall 1121 and the bottom wall 111 can have a gap therebetween.

[0046] The gap between the first side wall 1121 and the bottom wall 111 provides an outlet for the discharge of gas in the box body 11. After the process gas completes the film coating of the cutting surface of the battery piece 21, the process gas can be discharged from the gap between the first side wall 1121 and the bottom wall 111. By arranging the gap between the first side wall 1121 and the bottom wall 111, the discharge of gas in the box body 11 can be facilitated, and the movement path of the gas can be reduced.

[0047] In some embodiments, as shown in Figure 4 and Figure 5 The box body 11 can further include a support 13 movably arranged on the bottom wall 111. The surface of the support 13 away from the bottom wall 111 is a support surface 131 for carrying the battery piece 21.

[0048] The support 13 arranged on the bottom wall 111 can serve as a component for carrying the stacked battery pieces 21. By movably arranging the support 13 on the bottom wall 111, the taking of the battery piece 21 is facilitated. The support 13 can be lifted out of contact with the bottom wall 111, and the battery pieces 21 stacked on the support surface 131 can be gradually moved out of the accommodating cavity 101 of the box body 11. Thus, the taking of the battery piece 21 is facilitated.

[0049] In addition, the support surface 131 can be arranged to be inclined relative to the direction of the opening 102, and the distance between the support surface 131 and the opening 102 gradually decreases in the direction close to the through hole 113.

[0050] As shown in Figure 5 The support surface 131 of the support 13 has a certain inclination angle. In this way, the height difference of the stacked battery pieces 21 at the cutting edge can be compensated. Thus, the fit of a larger number of battery pieces 21 received in the accommodating cavity 101 is ensured, and the proportion of winding is reduced.

[0051] It should be noted that due to the thinness of the battery piece 21 at the cutting edge relative to the non-cutting edge, a large number of stacked battery pieces 21 will form a height difference on the cutting edge side relative to the non-cutting edge side. For example, 860 battery pieces 21 stacked together will be 1.5-3 mm lower on the cutting edge side relative to the non-cutting edge side. In actual cases, the side of the bearing surface 131 close to the through hole 113 can be made closer to the opening 102 relative to the other side, and the side of the bearing surface 131 close to the through hole 113 can form a height difference of about 2 mm relative to the other side, to accommodate the stacking and compression of a large number of battery pieces 21.

[0052] In some embodiments, the bottom wall 111 can be provided with a central hole 1111, and the surface of the bearing piece 13 can be provided with a protrusion 132 protruding away from the bearing surface 131, and the protrusion 132 is engaged with the central hole 1111.

[0053] The central hole 1111 of the bottom wall 111 is close to the center, which facilitates the movement of the bearing piece 13. When placing the bearing piece 13 in the box body 11, the protrusion 132 at the bottom of the bearing piece 13 can be inserted into the central hole 1111 of the bottom wall 111, and the cooperation between the bearing piece 13 and the bottom wall 111 can be completed.

[0054] The bearing piece 13 can be provided with a rectangular profile corresponding to the side wall 112 to ensure that the bearing piece 13 cannot easily rotate in the box body 11.

[0055] In addition, the bottom wall 111 can be provided with a plurality of hollow areas 1112 distributed on both sides of the central hole 1111.

[0056] The hollow area 1112 can provide a space for the lifting device to lift the bearing piece 13. The execution part of the lifting device can be supported on the bearing piece 13 through the hollow area 1112, thereby lifting the bearing piece 13 and moving the battery pieces 21 stacked on the bearing surface 131 of the bearing piece 13 out of the accommodating cavity 101 of the box body 11. By providing hollow areas 1112 on both sides of the central hole 1111, the bearing piece 13 can be lifted from different areas to ensure the stability of the battery pieces 21 when taken out of the box body 11.

[0057] In some embodiments, the side wall 112 away from the accommodating cavity 101 can be provided with a clamping piece 114 for clamping by a mechanical hand.

[0058] The clamping piece 114 is fixed on the outer side of the side wall 112, and a protruding structure is formed on the outer side of the side wall 112, which facilitates the overall transfer of the magazine. The mechanical hand can clamp the protruding structure, thereby transferring the magazine loaded with battery pieces 21 as a whole, which is conducive to realizing the automation of the battery piece 21 processing process.

[0059] As shown in Figure 3 The clamping members 114 can be arranged on the first side wall 1121 with a larger area. Moreover, the clamping members 114 can be arranged on both opposite side edges of the first side wall 1121, so that the manipulator can grasp the magazine from multiple positions.

[0060] Those skilled in the art can understand that the above-mentioned embodiments are specific examples for implementing the present application, and in actual application, various changes can be made in form and details without departing from the spirit and scope of the present application.

Claims

1. A battery sheet magazine, characterized by, The utility model relates to a battery piece box, which comprises a box body and a cover body. The box body is provided with a containing cavity for accommodating stacked battery pieces and an opening communicating with the containing cavity. The side wall comprises a first side wall and a second side wall arranged oppositely.

2. The battery piece box according to claim 1, wherein the plurality of through holes are arranged in an array on the side wall.

3. The battery piece box according to claim 2, wherein each through hole has a diameter of 0.5-2 mm.

4. The battery piece box according to claim 2, wherein the interval between two adjacent through holes is 20-25 mm.

5. The battery piece box according to claim 1, wherein the area of the first side wall is larger than that of the second side wall.

6. The battery piece box according to claim 5, wherein the first side wall is spaced apart from the bottom wall.

7. The battery piece box according to claim 1, wherein the box body further comprises a support movably arranged on the bottom wall.

8. The battery piece box according to claim 7, wherein the support surface is inclined relative to the direction of the opening.

9. The battery piece box according to claim 7, wherein the bottom wall is provided with a central hole, and the surface of the support is provided with a protruding portion protruding away from the support surface.

10. The battery piece box according to claim 9, wherein the bottom wall is provided with a plurality of hollow regions distributed on both sides of the central hole. ​ ​ ​ ​ ​ ​ ​ ​ 10. The cell sheet magazine of claim 9, wherein, ​ ​

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