CN211507586U

CN211507586U - Graphite boat

Info

Publication number: CN211507586U
Application number: CN202020508827.4U
Authority: CN
Inventors: 李荣瑞; 刘昌杰
Original assignee: CSI Cells Co Ltd; CSI Solar Power Group Co Ltd
Current assignee: Canadian Solar Inc; CSI Cells Co Ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-09-15
Anticipated expiration: 2030-04-09

Abstract

The utility model discloses a graphite boat, it belongs to photovoltaic cell production facility technical field, and this graphite boat includes: the photovoltaic film coating device comprises a graphite boat body, a film coating layer and a film coating layer, wherein the graphite boat body comprises a plurality of graphite boat pieces which are horizontally arranged at intervals up and down, a placing position for placing a photovoltaic cell piece to be coated is formed between every two adjacent graphite boat pieces, the distance between every two adjacent graphite boat pieces is larger than the thickness of the photovoltaic cell piece, and the surfaces of the graphite boat pieces, which are in contact with the photovoltaic cell piece, are planes; and the turnover mechanism is connected with the graphite boat body and can drive the graphite boat body to turn over relative to a horizontal plane so as to drive the photovoltaic cell to turn over. The utility model discloses can conveniently, realize the two-sided coating film of photovoltaic cell piece high-efficiently.

Description

Graphite boat

Technical Field

The utility model relates to a photovoltaic cell production facility technical field especially relates to a graphite boat.

Background

Photovoltaic power generation is a power generation method in which solar energy is used to make a semiconductor electronic device effectively absorb solar radiation energy and convert the solar radiation energy into electric energy.

The core component of photovoltaic power generation is a photovoltaic cell. In the manufacturing process of the photovoltaic cell, the antireflection film is a very important step in the manufacturing process of the photovoltaic cell. Plating the antireflection film for short. When coating, the photovoltaic cell is vertically fixed in the graphite boat through the clamping point of the graphite boat, and coating of the photovoltaic cell is completed.

In recent years, the mass production of PERC batteries (Passivated emitter and reactor cells) has been in progress. The PERC cell requires double-sided coating. Generally, when the two-sided coating is performed on the PERC battery, the front film and the back film of the PERC battery are coated separately, after the front coating is completed, the PERC battery is taken out from a graphite boat by using an automatic loading and unloading device, the PERC battery is placed in the graphite boat again after being turned over, and the back of the PERC battery is coated.

In the coating process, the front film and the back film are coated separately, so that the coating process is complicated, coating equipment is increased, the coating time is increased, and the production efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a graphite boat, its two-sided coating film that can conveniently, realize the photovoltaic cell piece high-efficiently improves production efficiency.

As the conception, the utility model adopts the technical proposal that:

a graphite boat, comprising:

the photovoltaic film coating device comprises a graphite boat body, a film coating layer and a film coating layer, wherein the graphite boat body comprises a plurality of graphite boat pieces which are horizontally arranged at intervals up and down, a placing position for placing a photovoltaic cell piece to be coated is formed between every two adjacent graphite boat pieces, the distance between every two adjacent graphite boat pieces is larger than the thickness of the photovoltaic cell piece, and the surfaces of the graphite boat pieces, which are in contact with the photovoltaic cell piece, are planes;

and the turnover mechanism is connected with the graphite boat body and can drive the graphite boat body to turn over relative to a horizontal plane so as to drive the photovoltaic cell to turn over.

Optionally, the graphite boat body further comprises a limiting structure, and the limiting structure is used for limiting the photovoltaic cell to slide out of the placing position in the overturning process.

Optionally, the limiting structure comprises limiting convex strips, each graphite boat piece is provided with the limiting convex strips, the limiting convex strips are arranged at the opening of the placing position, and the limiting convex strips can limit one side of the photovoltaic cell piece along the first direction.

Optionally, two opposite limiting protruding strips of two adjacent graphite boat pieces are arranged at intervals up and down to form the opening.

Optionally, the edge of the limiting convex strip is a rounded corner.

Optionally, the graphite boat body further comprises a back rod arranged in the vertical direction, the graphite boat pieces are connected through the back rod, the back rod is located at one end opposite to the opening, and the back rod can limit the other side portion of the photovoltaic cell piece in the first direction.

Optionally, the limiting structure further comprises a plurality of side limiting rod groups arranged at intervals along the first direction, the plurality of graphite boat pieces sequentially penetrate through the side limiting rod groups, the photovoltaic cell pieces can be placed between two adjacent side limiting rod groups, and the two adjacent side limiting rod groups can limit two sides of the photovoltaic cell pieces along the second direction.

Optionally, the distance between two adjacent side stop lever sets is adjustable.

Optionally, a plurality of side limiting hole groups are arranged on the graphite boat piece at intervals along the first direction, and the side limiting hole groups and the side limiting rod groups are arranged in a one-to-one correspondence manner;

each side limiting hole group comprises a plurality of side limiting adjusting hole groups arranged at intervals along the first direction, and one side limiting rod group corresponding to the side limiting hole group can be selectively positioned in one side limiting adjusting hole group of the side limiting hole group.

Optionally, the lateral limiting rod group comprises at least two limiting side rods arranged at intervals along the second direction; the side limiting adjusting hole group comprises at least two side limiting adjusting holes arranged at intervals along the second direction, and one limiting side rod corresponds to one side limiting adjusting hole.

The utility model provides a graphite boat sets up graphite boat piece level and interval from top to bottom, and the surface of graphite boat piece and photovoltaic cell piece contact is the plane to make the photovoltaic cell piece can the tiling on graphite boat piece. When one surface of the photovoltaic cell is coated, the photovoltaic cell is flatly laid on the graphite boat piece, and the other surface of the photovoltaic cell is contacted with the graphite boat piece, so that the coating of the one surface of the photovoltaic cell is completed. Treat that the one side coating film of photovoltaic cell piece accomplishes the back, start tilting mechanism, drive graphite boat body upset 180, the photovoltaic cell piece that is located to place the position also has carried out 180 upset thereupon, because the distance between two adjacent graphite boat pieces is greater than the thickness of photovoltaic cell piece, the one side upset that the coating film had been accomplished to photovoltaic cell piece this moment to with the contact of graphite boat piece, the another side of photovoltaic cell piece exposes, it can directly to carry out the coating film to the another side of photovoltaic cell piece 3.

The graphite boat can conveniently and rapidly complete double-sided coating of the photovoltaic cell, does not need to be provided with a special feeding and discharging device, can avoid scratching and even fragments of the photovoltaic cell caused by feeding and discharging of the photovoltaic cell, can save operation space, reduces operation equipment, and improves operation efficiency and production quality.

Drawings

FIG. 1 is a schematic diagram of a prior art graphite boat;

FIG. 2 is a front view of a graphite boat according to an embodiment of the present invention;

FIG. 3 is a schematic view of section A-A of FIG. 2;

FIG. 4 is a schematic view of a section A-A of the graphite boat of FIG. 2 after being turned 180 degrees;

FIG. 5 is a schematic view of a section B-B of one embodiment of the graphite boat of FIG. 2;

FIG. 6 is a schematic view of a section B-B of another embodiment of the graphite boat of FIG. 2;

FIG. 7 is a schematic view of a cross-section B-B of still another embodiment of the graphite boat of FIG. 2.

In fig. 1:

1', a graphite boat; 11', graphite boat pieces; 111', stuck point;

2', a photovoltaic cell sheet;

in fig. 2-4:

1. a graphite boat body; 11. a graphite boat piece; 121. limiting convex strips; 1211. round corners; 122. a side limit rod group; 1221. limiting side rods; 13. a back bar; 14. a rotating shaft; 15. a side limit hole group; 151. a side limiting adjusting hole group; 1511. a side limiting and adjusting hole;

2. a turnover mechanism;

3. a photovoltaic cell sheet;

4. placing bits; 41. and (4) opening.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, in the prior art, when a double-sided coating needs to be performed on a photovoltaic cell, a graphite boat 1 'is generally used to carry a photovoltaic cell 2'. The graphite boat 1 ' comprises a plurality of graphite boat pieces 11 ' arranged at intervals left and right in the vertical direction, clamping points 111 ' are arranged on the graphite boat pieces 11 ', and the photovoltaic cell pieces 2 ' are placed between every two adjacent graphite boat pieces 11 ' in the vertical direction through the clamping points 111 '.

When the front surface of the photovoltaic cell piece 2 ' is coated, the clamping point 111 ' is in contact with the back surface of the photovoltaic cell piece 2 '. After the front coating is finished, the photovoltaic cell 2 ' is taken out of the graphite boat 1 ' by adopting a special loading and unloading device, and the photovoltaic cell 2 ' is turned over by 180 degrees and then put into the graphite boat 1 ' again, so that the front of the photovoltaic cell 2 ' is contacted with the clamping point 111 ', and the back coating of the photovoltaic cell 2 ' is finished.

When the graphite boat 1 'is used for carrying out double-sided coating on the photovoltaic cell 2', the operation process is complicated, the operation time is long, a special feeding and discharging device needs to be arranged, and the number of operators is increased. In the process of taking, overturning and reloading the photovoltaic cell 2' by the feeding and blanking device, the coating film is easily scratched, and the fragment rate is also easily increased.

For solving above-mentioned problem, this embodiment provides a graphite boat, and its two-sided coating film that can once only accomplish photovoltaic cell piece need not to set up special unloader that goes up, improves operating efficiency and product quality.

Referring to fig. 2, the present embodiment provides a graphite boat including a graphite boat body 1 and a turnover mechanism 2.

The graphite boat body 1 comprises a plurality of graphite boat pieces 11 which are horizontally arranged and vertically arranged at intervals, a placing position 4 for placing a photovoltaic cell piece 3 to be coated is formed between every two adjacent graphite boat pieces 11, the distance between every two adjacent graphite boat pieces 11 is larger than the thickness of the photovoltaic cell piece 3, and the surface of the graphite boat pieces 11, which is in contact with the photovoltaic cell piece 3, is a plane; the turnover mechanism 2 is connected with the graphite boat body 1, and the turnover mechanism 2 can drive the graphite boat body 1 to turn over relative to a horizontal plane so as to drive the photovoltaic cell 3 to turn over.

The photovoltaic cell sheet 3 can be placed into the placing position 4 from the opening 41 of the placing position 4.

In this embodiment, the graphite boat piece 11 is horizontally arranged and vertically arranged at intervals, and the surface of the graphite boat piece 11, which can be in contact with the photovoltaic cell piece 3, is a plane, so that the photovoltaic cell piece 3 can be flatly laid on the graphite boat piece 11, and the photovoltaic cell piece 3 can be ensured to be in contact with the graphite boat piece 11 to be conductive. When one surface of the photovoltaic cell 3 is coated, the photovoltaic cell 3 is flatly laid on the graphite boat 11, and the other surface of the photovoltaic cell 3 is in contact with the graphite boat 11, so that the coating of the one surface of the photovoltaic cell 3 is completed.

After finishing coating the one side of the photovoltaic cell piece 3, starting the turnover mechanism 2, driving the graphite boat body 1 to slowly turn over 180 degrees at a constant speed, and then turning over the photovoltaic cell piece 3 in the placing position 4 by 180 degrees, wherein the one side of the photovoltaic cell piece 3 which has finished coating is turned over to be in contact with the graphite boat piece 11, and the other side of the photovoltaic cell piece 3 is exposed and directly coated on the other side of the photovoltaic cell piece 3.

Specifically, in this embodiment, one side of graphite boat body 1 is equipped with pivot 14, pivot 14 and graphite boat body 1 fixed connection, and tilting mechanism 2 can be the motor, and the output shaft and the pivot 14 of motor are connected, and the output shaft of motor rotates, drives pivot 14 and rotates, and then realizes the upset of graphite boat body 1. Of course, in other embodiments, the turnover mechanism 2 may be a turnover cylinder as long as the graphite boat body 1 can be turned over, and this is not limited to a large number.

Referring to fig. 3, taking the photovoltaic cell 3 placed in the uppermost placement position 4 as an example, in fig. 3, a first surface of the photovoltaic cell 3 is coated, at this time, a second surface of the photovoltaic cell 3 is attached to and laid on the graphite boat 11, and the first surface is not in contact with the graphite boat 11, at this time, the coating of the first surface of the photovoltaic cell 3 is completed; then start tilting mechanism 2, tilting mechanism 2 slowly drives graphite boat body 1 at the uniform velocity and overturns 180, see fig. 4, and graphite boat body 1 overturns to the position shown in fig. 4, and the position of placing 4 at photovoltaic cell piece 3 place is in the bottom this moment, and the first face upset of photovoltaic cell piece 3 is laid to laminating with graphite boat piece 11, and the second face does not contact with graphite boat piece 11 this moment, can directly carry out the coating film to photovoltaic cell piece 3's second face.

Further, in order to prevent that graphite boat body 1 from leading to photovoltaic cell piece 3 to take place the piece after photovoltaic cell piece 3 is placed the position from the opening 41 roll-off of placing position 4 in the upset in-process photovoltaic cell piece 3, graphite boat body 1 still includes limit structure, and limit structure is used for restricting photovoltaic cell piece 3 and places position 4 in the roll-off in-process roll-off.

Referring to fig. 3-5, the limiting structure includes limiting protruding strips 121, each graphite boat piece 11 is provided with limiting protruding strips 121, the limiting protruding strips 121 are disposed at the opening 41 of the placing position 4, and the limiting protruding strips 121 can limit one side of the photovoltaic cell piece 3 along the first direction.

Specifically, two opposite limiting protruding strips 121 of two adjacent graphite boat pieces 11 are arranged at intervals up and down to form the opening 41.

Specifically, the limit projection bar 121 extends in the first direction. In this embodiment, the first direction is the longitudinal direction of the graphite boat piece 11.

In order to prevent the edges of the limiting protruding strips 121 from scratching the surface of the photovoltaic cell 3, the edges of the limiting protruding strips 121 are rounded 1211. Preferably, both corners of the limiting protrusion strip 121 extending along its own extending direction are rounded corners 1211.

Referring to fig. 5, specifically, the graphite boat body 1 further includes a back bar 13 disposed along the vertical direction, the graphite boat pieces 11 are connected by the back bar 13, the back bar 13 is located at the opposite end of the opening 41, and the back bar 13 can limit the other side portion of the photovoltaic cell piece 3 along the first direction. Specifically, the back bar 13 is a ceramic bar.

Preferably, when the photovoltaic cell 3 is located in the placing position 4, a certain distance exists between the back rod 13 and the photovoltaic cell 3, so as to prevent the back rod 13 from interfering with the turning of the photovoltaic cell 3 during the turning.

Preferably, the back bar 13 is provided in plurality at intervals in the first direction. Optionally, three back bars 13 are disposed along the first direction corresponding to one photovoltaic cell 3, so as to effectively limit the side portions of the photovoltaic cell 3. Of course, in other embodiments, the number of the back rods 13 corresponding to one photovoltaic cell 3 may also be two, four or another number, which is not limited herein.

In the present embodiment, along the first direction, a plurality of photovoltaic cells 3 can be placed at intervals in one placement site 4. In order to prevent the photovoltaic cell sheets 3 from being displaced too much during the turning process, which may cause interference and even overlapping between two adjacent photovoltaic cell sheets 3, the other two side portions of the photovoltaic cell sheets 3 extending along the second direction need to be limited. Specifically, the second direction is perpendicular to the first direction.

Referring to fig. 2 and 5, in order to limit the other two side portions of the photovoltaic cell 3 extending along the second direction, the limiting structure further includes a plurality of side limiting rod sets 122 arranged at intervals along the first direction, the plurality of graphite boat pieces 11 sequentially pass through the side limiting rod sets 122, the photovoltaic cell 3 can be placed between two adjacent side limiting rod sets 122, and the two adjacent side limiting rod sets 122 can limit the two side portions of the photovoltaic cell 3 along the second direction.

Preferably, there is a certain distance between the side limiting rod set 122 and the photovoltaic cell 3, so as to prevent the side limiting rod set 122 from interfering with the turning of the photovoltaic cell 3 when the photovoltaic cell is turned.

In another embodiment, in order to accommodate photovoltaic cells 3 of different sizes, the distance between two adjacent side stop lever sets 122 is adjustable.

Specifically, referring to fig. 2 and 6, a plurality of side limiting hole sets 15 are arranged on the graphite boat piece 11 at intervals along the first direction, the side limiting hole sets 15 are arranged in one-to-one correspondence with the side limiting rod sets 122, each side limiting hole set 15 includes a plurality of side limiting adjustment hole sets 151 arranged at intervals along the first direction, and one side limiting rod set 122 corresponding to the side limiting hole set 15 can be selectively positioned in one of the side limiting adjustment hole sets 151 of the side limiting hole set 15.

Preferably, a certain distance is reserved between the lateral limiting and adjusting hole group 151 and the photovoltaic cell 3 placed on the placing position 4, so that the lateral limiting rod group 122 is prevented from interfering with the photovoltaic cell 3 when the photovoltaic cell 3 is turned over.

In yet another embodiment, referring to fig. 2 and 7, the lateral stop bar group 122 includes at least two stop side bars 1221 spaced apart in the second direction; the lateral position-limiting adjusting hole group 151 includes at least two lateral position-limiting adjusting holes 1511 arranged at intervals along the second direction, and one position-limiting side rod 1221 corresponds to one lateral position-limiting adjusting hole 1511. Taking the orientation shown in fig. 7 as an example, when one photovoltaic cell 3 is located in the placement position 4, the limiting convex strip 121 limits one side portion of the photovoltaic cell 3 along the first direction, the three back bars 13 limit the other side portion of the photovoltaic cell 3 along the first direction, and the side limiting bar group 122 limits two side portions of the photovoltaic cell 3 along the second direction. The phenomenon that the photovoltaic cell pieces 3 slide down or shift too much in the overturning process to cause the superposition of two adjacent photovoltaic cell pieces 3 and influence the film coating effect is avoided.

Specifically, in fig. 7, the side limiting hole set 15 includes three side limiting adjustment hole sets 151 arranged at intervals along the first direction, so that the side limiting rod set 122 can adapt to photovoltaic battery pieces 3 with different sizes; each of the lateral limit adjusting hole sets 151 includes three lateral limit adjusting holes 1511 spaced apart in the second direction, so that one of the lateral limit adjusting hole sets 151 can be fitted with three limit side rods 1221 to effectively limit the lateral portion of the photovoltaic cell 3 in the second direction.

When the graphite boat that this embodiment provided is adopted to carry out the coating film to photovoltaic cell piece 3, accomplish one side coating film back of photovoltaic cell piece 3, need not to take out photovoltaic cell piece 3 from the graphite boat, directly upset graphite boat body 1 can, compare with prior art, the reducible 40% of coating film time effectively improves production efficiency.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A graphite boat, comprising:

the graphite boat body (1) comprises a plurality of graphite boat pieces (11) which are horizontally arranged at intervals up and down, a placing position (4) for placing a photovoltaic cell piece (3) to be coated is formed between every two adjacent graphite boat pieces (11), the distance between every two adjacent graphite boat pieces (11) is larger than the thickness of the photovoltaic cell piece (3), and the surface of the graphite boat piece (11) in contact with the photovoltaic cell piece (3) is a plane;

the turnover mechanism (2) is connected with the graphite boat body (1), and the turnover mechanism (2) can drive the graphite boat body (1) to turn over relative to a horizontal plane so as to drive the photovoltaic cell (3) to turn over.

2. The graphite boat according to claim 1, characterized in that the graphite boat body (1) further comprises a limiting structure for limiting the photovoltaic cell sheet (3) from sliding out of the placing position (4) during overturning.

3. The graphite boat according to claim 2, wherein the limiting structure comprises limiting convex strips (121), each graphite boat piece (11) is provided with the limiting convex strips (121), the limiting convex strips (121) are arranged at the opening (41) of the placing position (4), and the limiting convex strips (121) can limit one side part of the photovoltaic cell piece (3) along the first direction.

4. The graphite boat according to claim 3, wherein two of the limiting projecting strips (121) facing each other of two adjacent graphite boat pieces (11) are spaced apart from each other to form the opening (41).

5. The graphite boat according to claim 3, wherein the corners of the limiting raised strips (121) are rounded corners (1211).

6. The graphite boat according to claim 3, wherein the graphite boat body (1) further comprises a back bar (13) arranged in a vertical direction, a plurality of the graphite boat pieces (11) are connected by the back bar (13), the back bar (13) is located at one end opposite to the opening (41), and the back bar (13) can limit the other side of the photovoltaic cell piece (3) in the first direction.

7. The graphite boat according to claim 2, wherein the limiting structure further comprises a plurality of side limiting rod sets (122) arranged at intervals along the first direction, a plurality of the graphite boat pieces (11) sequentially pass through the side limiting rod sets (122), the photovoltaic cell pieces (3) can be placed between two adjacent side limiting rod sets (122), and two adjacent side limiting rod sets (122) can limit two sides of the photovoltaic cell pieces (3) along the second direction.

8. The graphite boat according to claim 7, wherein the distance between two adjacent sets of side check rods (122) is adjustable.

9. The graphite boat according to claim 7 or 8, wherein a plurality of side limit hole groups (15) are arranged on the graphite boat piece (11) at intervals along the first direction, and the side limit hole groups (15) and the side limit rod groups (122) are arranged in a one-to-one correspondence manner;

each lateral limit hole group (15) comprises a plurality of lateral limit adjusting hole groups (151) arranged at intervals along the first direction, and one lateral limit rod group (122) corresponding to the lateral limit hole group (15) can be selectively positioned in one of the lateral limit adjusting hole groups (151) of the lateral limit hole group (15).

10. The graphite boat of claim 9, wherein the set of side check rods (122) includes at least two check side rods (1221) spaced apart in the second direction; the side limit adjusting hole group (151) comprises at least two side limit adjusting holes (1511) arranged at intervals along the second direction, and one limit side rod (1221) corresponds to one side limit adjusting hole (1511).