CA3044595A1 - Solar module - Google Patents
Solar module Download PDFInfo
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- CA3044595A1 CA3044595A1 CA3044595A CA3044595A CA3044595A1 CA 3044595 A1 CA3044595 A1 CA 3044595A1 CA 3044595 A CA3044595 A CA 3044595A CA 3044595 A CA3044595 A CA 3044595A CA 3044595 A1 CA3044595 A1 CA 3044595A1
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- edge electrode
- bus bars
- solar cell
- solar
- solar module
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Photovoltaic Devices (AREA)
Abstract
The present invention provides a solar module, comprises a plurality of solar cell strings. Each solar cell string has a plurality of rectangular solar cells arranged in line with adjacent solar cells partially overlapping and conductively bonded to each other. Each rectangular solar cell has a front edge electrode which is overlapped with a back edge electrode of an adjacent rectangular solar cell, wherein at least one of the front edge electrode and back edge electrode has a pair of paralleled bus bars and an unpatterned region formed therebetween for receiving adhesive material which is enclosed by the pair of bus bars and contacts with the unpatterned region directly. At least one of the front edge electrode and back edge electrode has been optimally designed, so that the cost is reduced and the electrical connection is more reliable. Besides, the demand on the electric conductive property of the adhesive is greatly lowered.
Description
SOLAR MODULE
TECHNICAL FIELD
[0001] The present invention relates to a field of photovoltaic(PV) technology, and in particular to a solar module.
BACKGROUND
TECHNICAL FIELD
[0001] The present invention relates to a field of photovoltaic(PV) technology, and in particular to a solar module.
BACKGROUND
[0002] The adjacent solar cells in a traditional PV module are electrically connected through solder strips. By contrast, the adjacent solar cells in a shingled module are partially overlapped with each other and bonded by a special conductive adhesive.
The shingled module with the same dimensions can hold more cells without using the solder strip, such that line loss and power loss are reduced.
The shingled module with the same dimensions can hold more cells without using the solder strip, such that line loss and power loss are reduced.
[0003] During the manufacturing process of the shingled module, a front bus bar of a solar cell and a rear bus bar of an adjacent solar cell are bonded and electrically connected through the conductive adhesive. The conductive adhesive needs to supply reliable bonding strength to the bus bars, and to meet the demand for electric conduction between the adjacent cells. Usually, the conductive adhesive generally is made of expensive sterling silver or silver-clad copper, which results in a relatively higher cost. Thus, not only the composition of the conductive adhesive required to be adjusted and improved, but also the bus bars of the solar cells need to be optimally designed to reduce the cost of the shingled module, and improve the power generation efficiency.
SUMMARY
SUMMARY
[0004] In view of this, the present invention provides a solar module, in order to reduce the cost, and improve the electrical connection of the adjacent solar cells.
[0005] According to an aspect of the present invention, a solar module comprises a plurality of solar cell strings, each of which having a plurality of rectangular solar cells arranged in line with adjacent solar cells partially overlapping and conductively bonded to each other. Each rectangular solar cell has a front edge electrode which is overlapped with a back edge electrode of an adjacent rectangular solar cell, wherein at least one of the front edge electrode and back edge electrode has a pair of paralleled bus bars and an unpatterned region formed therebetween for receiving elA I¨"es adhesive material which is enclosed by the pair of bus bars and contacts with the unpatterned region directly.
BRIEF DESCRIPTION OF THE DRAWINGS
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the described embodiments. In the drawings, reference numerals designate corresponding parts throughout various views, and all the views are schematic.
10007] FIG. 1 is a schematic view of a PV module according to the present invention;
[0008] FIG. 2 is a schematic view of adjacent solar cells in the PV module according to the present invention;
[0009] FIG. 3 is a schematic view showing that an adhesive is disposed on a solar cell in the PV module according to the present invention;
[0010] FIG. 4 is a schematic view showing that another solar cell overlapped onto the solar cell in FIG. 3;
[0011] FIG. 5 is a schematic view of adjacent solar cells in the PV module according to another embodiment of the present invention.
DETAILED DESCRIPTION
[0012] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations set forth in the following exemplary embodiments do not represent all implementations consistent with the present invention. Rather, they are merely examples of devices and methods consistent with certain aspects of the present invention as detailed in the appended claims.
[0013] As shown in FIG. 1, the solar module 100 includes a plurality of solar cell strings 101 arranged at intervals in first direction. Each solar cell strings 101 includes a plurality of rectangular solar cells 102. The plurality of solar cells 102 are sequentially overlapped end to end in a second direction perpendicular to the first direction.
1159Rdl [0014] Referring to Figs. 2-4, the solar cell 102 has a front surface 11 and a rear surface 12, and the solar cell 102 is provided with two edges that are disposed oppositely and extend in the first direction. Each rectangular solar cell 102 has a front edge electrode 2 which is overlapped with a back edge electrode 3 of an adjacent rectangular solar cell 102. The front edge electrode 2 is disposed on the front surface 11, and the back edge electrode 3 is disposed on the rear surface 12. Both the front and back edge electrodes 2, 3 extending in the first direction, and the front edge electrode 2 and the rear edge electrode 3 are disposed at the two opposite edges of the solar cell 102, respectively.
[0015] The adjacent solar cells 102 are connected with each other by the front edge electrode 2 on one solar cell 102 and the back edge electrode 3 on the other solar cell 102. Each of the connected front and back edge electrodes 2, 3 comprises a conductive area and a bonding area adjacent to the conductive area. The conductive areas of the connected front and back edge electrodes 2, 3 are contact directly to realize an electrical connection. The bonding areas of the connected front and back edge electrodes 2, 3 correspond to each other, and said bonding areas have the same shape. The solar module 100 further comprises an adhesive material 4 disposed on the bonding area to bond the adjacent solar cells 102 together.
[0016] At least one of the front edge electrode 2 and back edge electrode 3 has a pair of paralleled bus bars and an unpatterned region formed therebetween for receiving the adhesive material 4 which is enclosed by the pair of bus bars and contacts with the unpatterned region directly. Understandably, The pair of bus bars can be considered to be the conductive area, and the unpatterned region is considered to be the bonding area.
[0017] Here, the electric conduction between the adjacent solar cells 102 is mainly realized through the direct contaction of the conductive areas of the connected front and back edge electrodes 2, 3, and the adhesive material 4 is mainly configured to bond the adjacent two solar cells 102 into a whole. Thus, the demand on the electric conductive property of the adhesive material 4 is greatly lowered. That is, the consumption of silver powder in the adhesive material 4 can be reduced, and some low-priced materials can be used instead of high-priced silver powder.
[0018] The unpatterned region has an opening which is wider than a bottom portion of the unpatterned region. Preferably, the opening of the unpatterned region has a width of 33 m to 400 m in the second direction. The width of the bus bar in the second direction is 100pm to 400 m, and the bus bar has a height of 151.im to 20 Itm.
[0019] In the present embodiment, the front edge electrode 2 comprises two front bus bars 21 that are disposed close to each other, and a first unpatterned region 22 between the two front s bus bars 21. The back edge electrode 3 comprises two back bus bars 31 that are disposed close to each other, and a second unpatterned region 32 between the two back bus bars 31. A plurality of interconnecting finger electrodes (not shown) extending in the second direction in the first unpatterned region 22 and connecting the two front bus bars 21, and the interconnecting finger electrodes enable better electrical connection between the two front bus bars 21.
[0020] During positioning and overlapping of the adjacent solar cells 102, the first unpatterned region 22 and the second unpatterned region 32 are opposite to each other in pairs, so that the front bus bars 21 and the back bus bars 31 can directly contact to achieve reliable electrical conduction. Meanwhile, the first unpatterned region 22 and the second unpatterned region 32 form an accommodating cavity together for filling the adhesive material 4.
[0021] Wherein the front bus bar 21 and the back bus bar 31 are consistent in height and width. In addition, the first unpatterned region 22 and the second unpatterned region 32 have the same shape.
[0022] The adhesive material 4 is bonded to the bottom of the first and second unpatterned regions 22, 32 of the adjacent solar cells 102 and contacts at least partial surfaces of the front and back bus bars 21, 31. In order to enhance the bonding strength of the adjacent solar cells 102, the filling volume of the adhesive material 4 adapts to the volume of the accommodating cavity.
[0023] In production process, filling the first unpatterned region 22 formed in the front edge electrode 2 of the solar cell 102 with the adhesive material 4 first. Then, aligning the back edge electrode 3 of another solar cell 102 with the front edge electrode 2 and stacking the back edge electrode 3 on the front edge electrode 2, such that the front and rear bus bars 21, 31 are compressed against each other to achieve electric conduction. In an alternative embodiment, we can fill the second unpatterned region 32 with the adhesive material 4 first. Then, aligning and overlapping another solar cell 102. The first unpatterned region 22 or the second unpatterned region 32 may be filled with the adhesive material 4 by means of dispensing and printing.
Before the overlapping of the adjacent solar cells 102, the adhesive material 4 has an initial height being greater than sum of the heights of the front edge electrode 2 and the back edge electrode 3. After the overlapping, the adhesive material 4 extends laterally under the pressure, and the height of the adhesive material 4 is reduced to match the height of the accommodating cavity.
[0024] Referring to FIG. 5, in another embodiment of the present invention, the filling volume of the adhesive material 4 is smaller than the volume of the accommodating cavity. In this way, the adhesive material 4 will not overflow between the front bus bar 21 and the back bus bar 31 during stacking, and ensure the electric conduction of the front and back bus bars 21, 31. During practical production, the demand on the bonding strength of the adjacent solar cells 102 and the probable overflow risk of the adhesive material 4 need to be considered comprehensively to determine the filling volume of the adhesive material 4.
[0025] In other embodiments of the present invention (not shown), one of the front and back edge electrodes 2, 3 is provided with the pair of bus bars.
Similarly, the pair of bus bars are in direct contact with the conductive area of another solar cell 102.
[0026] In summary, the front and back edge electrodes 2, 3 have been optimally designed, the consumption of the paste formed the front and back edge electrodes 2, 3 can be reduced. The adjacent solar cells 102 are electrically connected by direct contact between the conductive areas of the front and back edge electrodes 2, 3. Thus, the cost is reduced, and the electrical connection is more reliable. Besides, the demand on the electric conductive property of the adhesive material 4 is greatly lowered.
[0027] It should be understood that although the description is described according to the above embodiments, each embodiment may not only include one independent technical solution. The presentation manner of the description is only for the sake of clarity. Those skilled in the art should take the description as an integral part. The technical solutions of the respective embodiments may be combined properly to form other embodiments understandable by those skilled in the art.
[0028] The above detailed description only illustrates the feasible embodiments of the present invention, and is not intended to limit the protection scope of the present invention. Equivalent embodiments or modifications within the scope and spirit of n4cnn the present invention shall be embraced by the protection scope of the present invention.
10007] FIG. 1 is a schematic view of a PV module according to the present invention;
[0008] FIG. 2 is a schematic view of adjacent solar cells in the PV module according to the present invention;
[0009] FIG. 3 is a schematic view showing that an adhesive is disposed on a solar cell in the PV module according to the present invention;
[0010] FIG. 4 is a schematic view showing that another solar cell overlapped onto the solar cell in FIG. 3;
[0011] FIG. 5 is a schematic view of adjacent solar cells in the PV module according to another embodiment of the present invention.
DETAILED DESCRIPTION
[0012] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations set forth in the following exemplary embodiments do not represent all implementations consistent with the present invention. Rather, they are merely examples of devices and methods consistent with certain aspects of the present invention as detailed in the appended claims.
[0013] As shown in FIG. 1, the solar module 100 includes a plurality of solar cell strings 101 arranged at intervals in first direction. Each solar cell strings 101 includes a plurality of rectangular solar cells 102. The plurality of solar cells 102 are sequentially overlapped end to end in a second direction perpendicular to the first direction.
1159Rdl [0014] Referring to Figs. 2-4, the solar cell 102 has a front surface 11 and a rear surface 12, and the solar cell 102 is provided with two edges that are disposed oppositely and extend in the first direction. Each rectangular solar cell 102 has a front edge electrode 2 which is overlapped with a back edge electrode 3 of an adjacent rectangular solar cell 102. The front edge electrode 2 is disposed on the front surface 11, and the back edge electrode 3 is disposed on the rear surface 12. Both the front and back edge electrodes 2, 3 extending in the first direction, and the front edge electrode 2 and the rear edge electrode 3 are disposed at the two opposite edges of the solar cell 102, respectively.
[0015] The adjacent solar cells 102 are connected with each other by the front edge electrode 2 on one solar cell 102 and the back edge electrode 3 on the other solar cell 102. Each of the connected front and back edge electrodes 2, 3 comprises a conductive area and a bonding area adjacent to the conductive area. The conductive areas of the connected front and back edge electrodes 2, 3 are contact directly to realize an electrical connection. The bonding areas of the connected front and back edge electrodes 2, 3 correspond to each other, and said bonding areas have the same shape. The solar module 100 further comprises an adhesive material 4 disposed on the bonding area to bond the adjacent solar cells 102 together.
[0016] At least one of the front edge electrode 2 and back edge electrode 3 has a pair of paralleled bus bars and an unpatterned region formed therebetween for receiving the adhesive material 4 which is enclosed by the pair of bus bars and contacts with the unpatterned region directly. Understandably, The pair of bus bars can be considered to be the conductive area, and the unpatterned region is considered to be the bonding area.
[0017] Here, the electric conduction between the adjacent solar cells 102 is mainly realized through the direct contaction of the conductive areas of the connected front and back edge electrodes 2, 3, and the adhesive material 4 is mainly configured to bond the adjacent two solar cells 102 into a whole. Thus, the demand on the electric conductive property of the adhesive material 4 is greatly lowered. That is, the consumption of silver powder in the adhesive material 4 can be reduced, and some low-priced materials can be used instead of high-priced silver powder.
[0018] The unpatterned region has an opening which is wider than a bottom portion of the unpatterned region. Preferably, the opening of the unpatterned region has a width of 33 m to 400 m in the second direction. The width of the bus bar in the second direction is 100pm to 400 m, and the bus bar has a height of 151.im to 20 Itm.
[0019] In the present embodiment, the front edge electrode 2 comprises two front bus bars 21 that are disposed close to each other, and a first unpatterned region 22 between the two front s bus bars 21. The back edge electrode 3 comprises two back bus bars 31 that are disposed close to each other, and a second unpatterned region 32 between the two back bus bars 31. A plurality of interconnecting finger electrodes (not shown) extending in the second direction in the first unpatterned region 22 and connecting the two front bus bars 21, and the interconnecting finger electrodes enable better electrical connection between the two front bus bars 21.
[0020] During positioning and overlapping of the adjacent solar cells 102, the first unpatterned region 22 and the second unpatterned region 32 are opposite to each other in pairs, so that the front bus bars 21 and the back bus bars 31 can directly contact to achieve reliable electrical conduction. Meanwhile, the first unpatterned region 22 and the second unpatterned region 32 form an accommodating cavity together for filling the adhesive material 4.
[0021] Wherein the front bus bar 21 and the back bus bar 31 are consistent in height and width. In addition, the first unpatterned region 22 and the second unpatterned region 32 have the same shape.
[0022] The adhesive material 4 is bonded to the bottom of the first and second unpatterned regions 22, 32 of the adjacent solar cells 102 and contacts at least partial surfaces of the front and back bus bars 21, 31. In order to enhance the bonding strength of the adjacent solar cells 102, the filling volume of the adhesive material 4 adapts to the volume of the accommodating cavity.
[0023] In production process, filling the first unpatterned region 22 formed in the front edge electrode 2 of the solar cell 102 with the adhesive material 4 first. Then, aligning the back edge electrode 3 of another solar cell 102 with the front edge electrode 2 and stacking the back edge electrode 3 on the front edge electrode 2, such that the front and rear bus bars 21, 31 are compressed against each other to achieve electric conduction. In an alternative embodiment, we can fill the second unpatterned region 32 with the adhesive material 4 first. Then, aligning and overlapping another solar cell 102. The first unpatterned region 22 or the second unpatterned region 32 may be filled with the adhesive material 4 by means of dispensing and printing.
Before the overlapping of the adjacent solar cells 102, the adhesive material 4 has an initial height being greater than sum of the heights of the front edge electrode 2 and the back edge electrode 3. After the overlapping, the adhesive material 4 extends laterally under the pressure, and the height of the adhesive material 4 is reduced to match the height of the accommodating cavity.
[0024] Referring to FIG. 5, in another embodiment of the present invention, the filling volume of the adhesive material 4 is smaller than the volume of the accommodating cavity. In this way, the adhesive material 4 will not overflow between the front bus bar 21 and the back bus bar 31 during stacking, and ensure the electric conduction of the front and back bus bars 21, 31. During practical production, the demand on the bonding strength of the adjacent solar cells 102 and the probable overflow risk of the adhesive material 4 need to be considered comprehensively to determine the filling volume of the adhesive material 4.
[0025] In other embodiments of the present invention (not shown), one of the front and back edge electrodes 2, 3 is provided with the pair of bus bars.
Similarly, the pair of bus bars are in direct contact with the conductive area of another solar cell 102.
[0026] In summary, the front and back edge electrodes 2, 3 have been optimally designed, the consumption of the paste formed the front and back edge electrodes 2, 3 can be reduced. The adjacent solar cells 102 are electrically connected by direct contact between the conductive areas of the front and back edge electrodes 2, 3. Thus, the cost is reduced, and the electrical connection is more reliable. Besides, the demand on the electric conductive property of the adhesive material 4 is greatly lowered.
[0027] It should be understood that although the description is described according to the above embodiments, each embodiment may not only include one independent technical solution. The presentation manner of the description is only for the sake of clarity. Those skilled in the art should take the description as an integral part. The technical solutions of the respective embodiments may be combined properly to form other embodiments understandable by those skilled in the art.
[0028] The above detailed description only illustrates the feasible embodiments of the present invention, and is not intended to limit the protection scope of the present invention. Equivalent embodiments or modifications within the scope and spirit of n4cnn the present invention shall be embraced by the protection scope of the present invention.
Claims (10)
1. A solar module comprising:
a plurality of solar cell strings, each solar cell string having a plurality of rectangular solar cells arranged in line with adjacent solar cells partially overlapping and conductively bonded to each other, wherein each rectangular solar cell has a front edge electrode which is overlapped with a back edge electrode of an adjacent rectangular solar cell, wherein at least one of the front edge electrode and back edge electrode has a pair of paralleled bus bars and an unpatterned region formed therebetween for receiving adhesive material which is enclosed by the pair of paralleled bus bars and contacts with the unpatterned region directly.
a plurality of solar cell strings, each solar cell string having a plurality of rectangular solar cells arranged in line with adjacent solar cells partially overlapping and conductively bonded to each other, wherein each rectangular solar cell has a front edge electrode which is overlapped with a back edge electrode of an adjacent rectangular solar cell, wherein at least one of the front edge electrode and back edge electrode has a pair of paralleled bus bars and an unpatterned region formed therebetween for receiving adhesive material which is enclosed by the pair of paralleled bus bars and contacts with the unpatterned region directly.
2. The solar module as claimed in claim 1, wherein a pair of bus bars on the front edge electrode conductively contact with a pair of bus bars on the back edge electrode while the adhesive material provides nonconductive connection between two adjacent solar cells.
3. The solar module as claimed in claim 1, wherein the adhesive material has a poor conductivity than the bus bars.
4. The solar module as claimed in claim 2, wherein the bus bars of two adjacent solar cells contact directly to form an enclosed space to contain the adhesive material.
5. The solar module as claimed in claim 1, wherein the width of the unpatterned region is 33µm to 400µm.
6. The solar module as claimed in claim 2, wherein the height of the bus bar is 15µm to 20µm.
7. The solar module as claimed in claim 1, wherein the width of the bus bar is 100µm to 400µm.
8. The solar module as claimed in claim 1, wherein each unpatterned region has an opening which is wider than a bottom portion of the unpatterned region.
9. The solar module as claimed in claim 2, wherein the bus bars of the two adjacent solar cells have a same height.
10. The solar module as claimed in claim 1, wherein each rectangular solar cell comprises a plurality of finger electrodes perpendicularly connecting with the front edge electrode, some of the finger electrodes extend through the two paralleled bus bars.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820819159.XU CN208256682U (en) | 2018-05-30 | 2018-05-30 | Photovoltaic module |
| CN201820819159.X | 2018-05-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA3044595A1 true CA3044595A1 (en) | 2019-11-30 |
| CA3044595C CA3044595C (en) | 2023-07-11 |
Family
ID=64651595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3044595A Active CA3044595C (en) | 2018-05-30 | 2019-05-29 | Solar module |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN208256682U (en) |
| CA (1) | CA3044595C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109802002B (en) * | 2019-03-05 | 2024-04-12 | 通威太阳能（合肥）有限公司 | Stacked double-sided battery assembly and manufacturing method thereof |
| CN110473924A (en) * | 2019-09-05 | 2019-11-19 | 成都晔凡科技有限公司 | The manufacturing method of imbrication component, solar battery sheet and imbrication component |
| CN110556437A (en) * | 2019-09-05 | 2019-12-10 | 成都晔凡科技有限公司 | Laminated tile assembly, solar cell and manufacturing method of laminated tile assembly |
| CN110581185A (en) * | 2019-09-05 | 2019-12-17 | 成都晔凡科技有限公司 | Laminated assembly and method for manufacturing laminated assembly |
| JP7442377B2 (en) * | 2020-04-08 | 2024-03-04 | 株式会社カネカ | Solar cell string and method for manufacturing solar cell string |
| CN113161439B (en) * | 2021-01-30 | 2023-12-19 | 中节能太阳能科技（镇江）有限公司 | Battery interconnection structure, assembly and preparation method |
| CN117238982A (en) * | 2022-09-09 | 2023-12-15 | 晶科能源股份有限公司 | Photovoltaic cell, preparation method thereof and photovoltaic module |
-
2018
- 2018-05-30 CN CN201820819159.XU patent/CN208256682U/en active Active
-
2019
- 2019-05-29 CA CA3044595A patent/CA3044595C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN208256682U (en) | 2018-12-18 |
| CA3044595C (en) | 2023-07-11 |
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