CN210506519U

CN210506519U - Graphite bearing plate

Info

Publication number: CN210506519U
Application number: CN201921612522.1U
Authority: CN
Inventors: 张春华
Original assignee: CSI Cells Co Ltd; CSI Solar Power Group Co Ltd
Current assignee: Canadian Solar Inc; CSI Cells Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-05-12
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a graphite loading board, it includes the bottom plate and establishes a plurality of graphite units on the bottom plate, and every graphite unit all includes the body, is equipped with the battery jar on the body, is equipped with the support column in the battery jar, and the support column configuration still is equipped with the reference column on the body for supporting the battery piece, and the reference column is configured the location battery piece. The utility model discloses graphite loading board, owing to adopt to establish at the inside support column support battery piece of battery jar and establish the reference column location battery piece in the battery jar outside, the area of contact of battery piece and graphite loading board has been reduced, the last probably of battery piece is moved to the graphite particle that the graphite unit produced has been reduced, thereby the probability of producing EL black spot on the battery piece has been reduced, the temperature difference between the contact site of battery piece and graphite unit and other parts has still been reduced, thereby the probability of battery piece production colour difference has been reduced.

Description

Graphite bearing plate

Technical Field

The utility model relates to a photovoltaic equipment technical field especially relates to a graphite loading board.

Background

Among solar cells, the PERC (PERC) cell is currently used as a back passivation device, an ideal energy ALD (ALD) device, and the carrier is a graphite plate. In the graphite plate, be equipped with the crisscross loading board of plural number horizontal and vertical, constitute a plurality of graphite plate grids, have the ladder in every graphite plate grid, during the passivation of battery piece back, the battery piece is put at second layer ladder, because the passivation of back, positive N face of battery and graphite plate direct contact, because the graphite plate produces graphite particles very easily, appear the phenomenon of EL black spot after the battery processing finishes easily. In addition, the edge of the battery is lapped on the graphite plate, and the central part of the battery is not contacted with the graphite plate, so that the edge of the battery and the center of the battery have temperature difference in the processing process, the edge of the battery becomes red after film coating is finished, and graphite stepped marks exist, so that the edge of the battery and the center of the battery form color difference.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a graphite loading board, this graphite loading board can reduce the probability that EL black speck appears in the battery piece, reduces the probability that the colour difference appears in the battery piece.

In order to achieve the above technical purpose, the utility model discloses a technical scheme of graphite loading board as follows:

a graphite bearing plate comprises a bottom plate and a plurality of graphite units arranged on the bottom plate, wherein each graphite unit comprises a body, a battery jar is arranged on the body, a support column is arranged in the battery jar, the support column is configured to support a battery piece, a positioning column is further arranged on the body, and the positioning column is configured to position the battery piece; or the side wall of the battery piece is stopped against the side wall of the battery groove.

In some embodiments, the support post, the positioning post and the body are an integral part.

In some embodiments, a support hole is formed in the bottom wall of the battery jar, the support column is inserted into the support column, and the support column is a ceramic piece.

In some embodiments, the body is provided with a positioning hole, the positioning column is inserted into the positioning hole, and the positioning column is a ceramic piece.

In some embodiments, a plurality of the graphite units are arranged on the bottom plate in a plurality of rows and a plurality of columns.

In some embodiments, the battery well is formed in a square shape, and four corners of the battery well are each provided with a chamfer.

In some embodiments, the number of the supporting columns is multiple, the supporting columns are divided into four groups, and each group of the supporting columns corresponds to one chamfer.

In some embodiments, the number of the positioning columns is multiple, the positioning columns are equally divided into four groups, each group of the positioning columns is arranged corresponding to one side wall of the battery jar, and the positioning columns are distributed at intervals along the extending direction of the side wall of the battery jar arranged corresponding to the positioning columns.

In some embodiments, the support post and the positioning post are circular in cross-section, and the positioning post and the support post have a diameter of 0.1mm-10 mm.

In some embodiments, the upper end surface of the supporting column is located below the upper end surface of the positioning column, and the distance between the upper end surface of the supporting column and the upper end surface of the positioning column is 0.1mm-6 mm.

The utility model discloses graphite loading board, owing to adopt to establish at the inside support column support battery piece of battery jar and establish the reference column location battery piece in the battery jar outside, the area of contact of battery piece and graphite loading board has been reduced, the last probably of battery piece is moved to the graphite particle that the graphite unit produced has been reduced, thereby the probability of producing EL black spot on the battery piece has been reduced, the temperature difference between the contact site of battery piece and graphite unit and other parts has still been reduced, thereby the probability of battery piece production colour difference has been reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic view illustrating the matching between the graphite bearing plate and the battery piece according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a single graphite unit according to an embodiment of the present invention.

Reference numerals:

1. a graphite unit;

11. a body;

111. a battery case; 1111. chamfering; 112. a support pillar; 113. a positioning column;

2. a base plate;

100. a battery piece.

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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

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, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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.

The specific structure of the graphite bearing plate according to the embodiment of the present invention will be described with reference to fig. 1 to 2.

As shown in fig. 1-2, the graphite bearing plate according to the embodiment of the present invention includes a bottom plate 2 and a plurality of graphite units 1 disposed on the bottom plate 2, each graphite unit 1 includes a body 11, a battery jar 111 is disposed on the body 11, a supporting pillar 112 is disposed in the battery jar 111, the supporting pillar 112 is configured to support a battery piece 100, a positioning pillar 113 is further disposed on the body 11, and the positioning pillar 113 is configured to position the battery piece 100; or the side wall of the battery sheet 100 abuts against the side wall of the battery container 111.

It will be appreciated that, in actual use, the battery sheet 100 is placed in the battery container 111 such that the support posts 112 abut against the end faces of the battery sheet 100 and the positioning posts 113 abut against the edges of the battery sheet 100, whereby the battery sheet 100 can be mounted on the graphite unit 1. In the embodiment of the present invention, since the supporting battery piece 100 is the supporting column 112 disposed in the battery container 111, the contact area between the battery piece 100 and the graphite unit 1 is very small, on one hand, it is possible to reduce the movement of the graphite particles generated by the graphite unit 1 to the battery piece 100, thereby reducing the probability of generating EL black spots on the battery piece 100, and on the other hand, it reduces the temperature difference between the contact part of the battery piece 100 and the graphite unit 1 and other parts, thereby reducing the probability of generating color difference of the battery piece 100.

The utility model discloses graphite loading board, owing to adopt to establish at the inside support column 112 support battery piece 100 of battery jar 111 and establish at the 113 location battery pieces 100 of reference column in the battery jar 111 outside, the area of contact of battery piece 100 with graphite loading board has been reduced, the graphite particle that has reduced graphite unit 1 and has produced moves the possibility to battery piece 100, thereby the probability of producing EL black spot on the battery piece 100 has been reduced, still reduced the temperature difference between battery piece 100 and graphite unit 1's contact site and other parts, thereby the probability of battery piece 100 production colour difference has been reduced.

It should be added that, when the cross-sectional area of the battery piece 100 is larger than the cross-sectional area of the battery container 111, the battery piece 100 is positioned by the positioning post 113, when the cross-sectional area of the battery piece 100 is equal to the cross-sectional area of the battery container 111 and the contour line of the battery piece 100 is consistent with the contour of the battery container 111, the positioning post 113 is not required to be arranged on the body 11, the battery piece 100 can be positioned by directly using the side wall of the battery container 111, when the cross-sectional area of the battery piece 100 is smaller than the cross-sectional area of the battery container 111, the entire battery piece 100 is located in the battery container 111, and the positioning post 113 located inside the battery container.

In some embodiments, the supporting column 112, the positioning column 113 and the body 11 are integrally formed. It can be understood that the supporting columns 112, the positioning columns 113 and the body 11 are integrally formed, so that the number of parts of each graphite unit 1 is reduced, the production of each graphite unit 1 is facilitated, and the production cost of each graphite unit 1 and the whole graphite bearing plate is reduced.

In some embodiments, the bottom wall of the battery container 111 is provided with a support hole, the support pillar 112 is inserted into the support pillar 112, and the support pillar 112 is a ceramic member. It should be noted that, if the supporting posts 112 and the main body 11 are integrally formed, since the supporting posts 112 are graphite pieces, a certain amount of graphite particles will be diffused onto the battery piece 100 during the processing of the battery piece 100, so as to increase the probability of generating EL black spots on the battery piece 100. In the embodiment, the supporting posts 112 are ceramic pieces inserted into the supporting holes of the battery container 111, that is, in the whole production process of the battery piece 100, the supporting posts 112 do not generate graphite particles, so that the probability of generating EL black spots on the battery piece 100 is reduced to the maximum extent, and the production yield of the battery piece 100 is improved. In addition, the battery container 111 may include a plurality of support pillars 112, and the support pillars 112 may selectively cooperate with the positioning holes, so that when the cross-sectional area of the battery piece 100 is smaller than that of the battery container 111, after the battery piece 100 is placed in the battery container 111, a part of the support pillars 112 support the battery piece 100, and another part of the support pillars 112 position the battery piece 100, so that the graphite unit 1 may be adapted to battery pieces 100 of different specifications, thereby expanding the application range of the graphite bearing plate.

Optionally, the support column 112 and the battery jar 111 are in interference fit, so that the structures of the support column 112 and the battery jar 111 are simplified to a certain extent, and the production cost of the whole graphite bearing plate is reduced. Of course, in other embodiments of the present invention, the supporting column 112 may be provided with an external thread, and the supporting hole is a threaded hole, or the supporting column 112 and the battery jar 111 are connected by bonding. It should be added here that in other embodiments of the present invention, the supporting column 112 may be formed as a stainless steel piece or other high temperature resistant material piece, and is not limited to the ceramic piece of this embodiment.

In some embodiments, the body 11 is provided with a positioning hole, the positioning column 113 is inserted into the positioning hole, and the positioning column 113 is a ceramic piece. It should be noted that, if the positioning posts 113 and the main body 11 are integrally formed, since the positioning posts 113 are graphite pieces, a certain amount of graphite particles will be diffused onto the battery piece 100 during the processing of the battery piece 100, so as to improve the probability of generating EL black spots on the battery piece 100. In the embodiment, the positioning column 113 is a ceramic part inserted into the positioning hole of the battery jar 111, that is, in the whole production process of the battery piece 100, the positioning column 113 does not generate graphite particles, so that the probability of generating EL black spots on the battery piece 100 is reduced to the maximum extent, and the production yield of the battery piece 100 is improved. In addition, the main body 11 may include a plurality of positioning posts 113, and the positioning posts 113 may be selectively engaged with the positioning holes, so that the graphite unit 1 may be adapted to battery pieces 100 of different specifications, thereby expanding the application range of the graphite bearing plate.

Optionally, interference fit is performed between the positioning column 113 and the battery jar 111, so that the structures of the positioning column 113 and the battery jar 111 are simplified to a certain extent, and the production cost of the whole graphite bearing plate is reduced. Of course, in other embodiments of the present invention, the positioning column 113 may have an external thread thereon, and the positioning hole is a threaded hole, or the positioning column 113 and the battery jar 111 are connected by bonding. It should be added here that in other embodiments of the present invention, the positioning column 113 may be formed as a stainless steel piece or other high temperature resistant material piece, and is not limited to the ceramic piece of this embodiment.

Further, in the embodiment of the present invention, there may be various connection relationships between the positioning column 113 and the supporting column 112 and the body 11. For example, in some embodiments, the positioning post 113 is integrally formed with the body 11, and the supporting post 112 is detachably connected to the body 11. For example, in some embodiments, the support post 112 is integrally formed with the body 11, and the positioning post 113 is detachably connected to the body 11. For example, in some embodiments, the supporting column 112 and the positioning column 113 are integrally formed with the body 11. For example, in some embodiments, the supporting column 112, the positioning column 113 and the main body 11 can be detachably connected.

In some embodiments, as shown in fig. 1, a plurality of graphite units 1 are arranged on a base plate 2 in a plurality of rows and columns. It can be understood that, a plurality of graphite units 1 are clapped more and have been guaranteed a plurality of battery pieces 100 equipartition on the bottom plate 2 equipartition, have guaranteed the homogeneity of a plurality of battery pieces 100 coating films like this to the uniformity of a plurality of battery pieces 100 that are located a graphite loading board has been promoted. Of course, in other embodiments of the present invention, the plurality of graphite units 1 may be distributed on the bottom plate 2 in other manners, and is not limited to the arrangement manner of multiple rows and multiple columns in this embodiment.

In some embodiments, as shown in fig. 2, the battery well 111 is formed in a square shape, and four corners of the battery well 111 are provided with chamfers 1111. It can be understood that, most of the current battery pieces 100 are formed in a square shape, the battery container 111 is formed in a square shape to facilitate the installation of the battery pieces 100, and the shape of the battery container 111 matched with the battery pieces 100 can reduce the volume of the body 11, so that more battery pieces 100 can be accommodated on the bottom plate 2 of the same size. In addition, the chamfers 1111 are arranged at the four corners of the battery jar 111, so that the phenomenon of stress concentration at the corners of the battery jar 111 can be relieved, and the damage probability of the battery jar 111 is reduced. Of course, in other embodiments of the present invention, the four corners of the battery container 111 may also be formed as round corners, or the battery container 111 may be formed as a circle, a polygon, or other shapes, which may be specifically selected according to actual needs.

In some embodiments, as shown in fig. 2, there are a plurality of support pillars 112, and the plurality of support pillars 112 are divided into four groups, and each group of support pillars 112 is disposed corresponding to one chamfer 1111. Therefore, the four positioning columns 113 can stably support the battery piece 100, so that the stability of the battery piece 100 is ensured, and the production yield of the battery piece 100 is indirectly ensured. Of course, the distribution of the supporting columns 112 can also be selected according to actual needs, and is not limited to the distribution of the embodiment.

In some embodiments, as shown in fig. 2, the number of the positioning pillars 113 is multiple, the positioning pillars 113 are divided into four groups, each group of the positioning pillars 113 is disposed corresponding to one side wall of the battery container 111, and the positioning pillars 113 are distributed at intervals along the extending direction of the side wall of the battery container 111 disposed corresponding to the positioning pillars 113. Therefore, the four positioning columns 113 can stably position the battery piece 100, the stability of the battery piece 100 is guaranteed, the battery piece 100 is prevented from shaking to the maximum extent, and the production yield of the battery piece 100 is indirectly guaranteed. Of course, the distribution mode of the positioning pillars 113 can also be selected according to actual needs, and is not limited to the distribution mode of the embodiment.

In some embodiments, the cross-sections of the supporting column 112 and the positioning column 113 are circular, and the diameters of the positioning column 113 and the supporting column 112 are 0.1mm-10 mm. It can be understood that too small diameters of the

positioning pillars

113 and 112 may reduce the strength of the

positioning pillars

113 and 112, thereby increasing the damage rate of the

positioning pillars

113 and 112, while too large diameters of the supporting pillars 112 may increase the contact area between the supporting pillars 112 and the battery piece 100, thereby increasing the probability of generating EL black spots on the battery piece 100, and too large diameters of the positioning pillars 113 may increase the production cost of the positioning pillars 113. Therefore, in the embodiment, the diameters of the positioning column 113 and the supporting column 112 are within 0.1mm-10mm, which not only ensures the strength of the positioning column 113 and the supporting column 112, reduces the damage rate of the positioning column 113 and the supporting column 112, but also limits the contact area between the supporting column 112 and the battery piece 100, reduces the probability of generating EL black spots on the battery piece 100, and also reduces the cost of the positioning column 113 and the supporting column 112.

Of course, in other embodiments of the present invention, the shapes and sizes of the supporting column 112 and the positioning column 113 can be selected according to actual needs, and are not limited to the above description.

In some embodiments, the upper end surface of the supporting column 112 is located below the upper end surface of the positioning column 113, and the distance between the upper end surface of the supporting plate and the upper end surface of the positioning column 113 is 0.1mm-6 mm. Therefore, the positioning effect of the positioning column 113 on the battery piece 100 is better ensured, the possibility of shaking of the battery piece 100 is reduced, and the yield of the battery piece 100 is indirectly ensured.

In some embodiments, the center of positioning post 113 is spaced 1-2mm from the side wall of battery well 111. Therefore, the positioning effect of the positioning column 113 on the battery piece 100 is better ensured, the possibility of shaking of the battery piece 100 is reduced, and the yield of the battery piece 100 is indirectly ensured.

Example (b):

the structure of the graphite bearing plate according to an embodiment of the present invention is described below with reference to fig. 1 to 2.

As shown in fig. 1-2, the graphite carrier plate of the present embodiment includes a bottom plate 2 and a plurality of graphite units 1 disposed on the bottom plate 2, wherein the plurality of graphite units 1 are disposed on the bottom plate 2 in multiple rows and multiple columns. Each graphite unit 1 comprises a body 11, a square battery jar 111 is arranged on the body 11, and four corners of the battery jar 111 are provided with chamfers 1111. Eight supporting holes are formed in the battery jar 111, a positioning column 113 made of ceramic is matched in each supporting hole, the eight supporting holes are divided into four groups, and each group of supporting holes correspond to a chamfer 1111. Four positioning holes are formed in the body 11, the four positioning holes are arranged corresponding to the middle points of the four side walls of the battery jar 111, and a positioning column 113 made of ceramic is matched in each positioning hole.

The graphite bearing plate of the present embodiment has the following advantages:

1. the setting positioning column 113 is arranged on the body 11, the battery piece 100 is placed on the positioning column 113, the probability that graphite particles are diffused to the battery piece 100 is reduced, the probability that EL black spots are formed on the battery piece 100 by the graphite particles is reduced, the difference between the edge temperature and the center of the battery piece 100 is reduced, the N-surface coating color difference of the battery piece 100 is reduced, and the conversion efficiency of the battery piece 100 is improved;

2. the battery jar 111 is arranged on the body 11, so that the probability of warping of the battery piece 100 caused by uneven end faces of the graphite plate is reduced, and the probability of coating color difference caused by uneven coating is reduced;

3. the fixing columns for positioning the battery pieces 100 are arranged on the body 11, so that the battery pieces 100 are prevented from sliding, and the probability of uneven film coating and color difference of the battery pieces 100 is reduced;

4. the positioning column 113 is detachably connected with the body 11, so that the compatibility of the graphite unit 1 with the battery piece 100 is improved, and the application range of the graphite bearing plate is expanded.

In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The graphite bearing plate is characterized by comprising a bottom plate (2) and a plurality of graphite units (1) arranged on the bottom plate (2), wherein each graphite unit (1) comprises a body (11), a battery jar (111) is arranged on the body (11), a support column (112) is arranged in the battery jar (111), and the support column (112) is configured to support a battery piece (100); the body (11) is also provided with a positioning column (113), and the positioning column (113) is configured to position the battery piece (100); or the side wall of the battery piece (100) is stopped against the side wall of the battery groove (111).

2. The graphite bearing plate according to claim 1, characterized in that the supporting columns (112), the positioning columns (113) and the body (11) are an integrally formed part.

3. The graphite bearing plate according to claim 1, wherein a bottom wall of the battery well (111) is provided with a support hole, the support column (112) is inserted into the support column (112), and the support column (112) is a ceramic piece.

4. The graphite bearing plate according to claim 1, wherein the main body (11) is provided with a positioning hole, the positioning column (113) is inserted into the positioning hole, and the positioning column (113) is a ceramic member.

5. The graphite carrier plate according to claim 1, characterized in that a plurality of the graphite units (1) are arranged on the bottom plate (2) in a plurality of rows and columns.

6. The graphite bearing plate according to claim 1, characterized in that the battery well (111) is formed square, and four corners of the battery well (111) are provided with chamfers (1111).

7. The graphite bearing plate according to claim 6, wherein the number of the supporting columns (112) is plural, and the plurality of supporting columns (112) are divided into four groups, and each group of the supporting columns (112) is disposed corresponding to one of the chamfers (1111).

8. The graphite bearing plate according to claim 6, wherein the number of the positioning pillars (113) is plural, the plurality of positioning pillars (113) are divided into four groups, each group of the positioning pillars (113) is disposed corresponding to one side wall of the battery jar (111), and the plurality of positioning pillars (113) are spaced apart from each other along the extending direction of the side wall of the battery jar (111) disposed corresponding thereto.

9. The graphite bearing plate according to any one of claims 1 to 8, wherein the cross-sections of the support columns (112) and the positioning columns (113) are circular, and the diameters of the positioning columns (113) and the support columns (112) are 0.1mm to 10 mm.

10. The graphite bearing plate according to any one of claims 1 to 8, wherein the upper end face of the support column (112) is located below the upper end face of the positioning column (113), and the distance between the upper end face of the support column (112) and the upper end face of the positioning column (113) is 0.1mm to 6 mm.