CN113764538A - Buckle type connector of back contact solar cell and battery pack - Google Patents
Buckle type connector of back contact solar cell and battery pack Download PDFInfo
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- CN113764538A CN113764538A CN202111189768.4A CN202111189768A CN113764538A CN 113764538 A CN113764538 A CN 113764538A CN 202111189768 A CN202111189768 A CN 202111189768A CN 113764538 A CN113764538 A CN 113764538A
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- 238000009413 insulation Methods 0.000 claims description 20
- 238000005452 bending Methods 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 40
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000003292 glue Substances 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0516—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module specially adapted for interconnection of back-contact solar cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
-
- 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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- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The application is suitable for the technical field of solar cells and provides a back-contact solar cell's buckle formula connector and battery pack. The buckle type connector of the back contact solar cell comprises a first side wall, a second side wall and a bottom wall, wherein the first side wall and the second side wall are oppositely arranged at the same side of the bottom wall, an accommodating groove is formed by the first side wall, the second side wall and the bottom wall in a surrounding mode and is used for accommodating a first edge part of the first back contact cell, the first side wall comprises a first connecting surface facing the second side wall, the first connecting surface is used for being electrically connected with a first electrode of the first back contact cell, the second side wall comprises a second connecting surface deviating from the first side wall, the second connecting surface is used for abutting against a second edge part of the second back contact cell and being electrically connected with a second electrode of the second back contact cell, the polarities of the first electrode and the second electrode are opposite, and the bottom wall is used for being electrically connected with the first connecting surface and the second connecting surface. Thus, the loss of sunlight at the gap and stress bending can be reduced.
Description
Technical Field
The application belongs to the technical field of solar cells, and particularly relates to a back-contact solar cell's buckle formula connector and battery pack.
Background
In the battery module of the related art, adjacent two back-contact batteries are generally connected in series by a bus bar. However, a gap is left between two adjacent back contact cells, sunlight irradiated to the gap is lost, and stress bending is easily generated. Therefore, how to serially connect back contact cells to reduce solar loss and stress bending becomes an urgent problem to be solved.
Disclosure of Invention
The application provides a snap-in connector of a back contact solar cell and a cell module, aiming at solving the problem of how to serially connect back contact cells to reduce the loss of sunlight and reduce stress bending.
In a first aspect, the present application provides a clip connector for a back contact solar cell, which includes a first sidewall, a second sidewall and a bottom wall, the first sidewall and the second sidewall are disposed opposite to each other on the same side of the bottom wall, the first sidewall, the second sidewall and the bottom wall define a receiving slot, the receiving slot is used for receiving a first edge of a first back contact cell, the first sidewall includes a first connection surface facing the second sidewall, the first connection surface is used for electrically connecting a first electrode of the first back contact cell, the second sidewall includes a second connection surface deviating from the first sidewall, the second connection surface is used for abutting against a second edge of the second back contact cell and electrically connecting a second electrode of the second back contact cell, the polarities of the first electrode and the second electrode are opposite, the bottom wall is used for electrically connecting the first connecting surface and the second connecting surface.
Optionally, the snap-in connector has conductivity, and a first insulating layer is disposed on a surface of the second sidewall facing the first sidewall.
Optionally, the snap-in connector has conductivity, and a second insulating layer is disposed on a surface of the bottom wall facing the first side wall and the second side wall.
Optionally, the first connection surface includes a connection region and an insulation region, the connection region and the insulation region both abut against the first back contact cell, the connection region is electrically connected to the first back contact cell, the connection region is located between the insulation region and the bottom wall, and the insulation region is provided with a third insulation layer.
Optionally, the first side wall comprises a first spacing face facing the second side wall, the first spacing face being located between the first connection face and the bottom wall; the second side wall comprises a second spacing surface facing the first side wall and corresponding to the first spacing surface.
Optionally, the width of the first spacing surface ranges from 0.01mm to 40 mm; the width range of the second spacing surface is 0.01mm-40 mm.
Optionally, the width of the first sidewall is greater than the width of the second sidewall, and the difference between the widths of the first sidewall and the second sidewall ranges from 0.01mm to 40 mm.
Optionally, the width of the first side wall ranges from 0.06mm to 50mm, and the width of the second side wall ranges from 0.05mm to 45 mm.
Optionally, the length of the first sidewall is equal to the length of the second sidewall, and the length of the first sidewall is less than or equal to the length of the first back contact cell.
In a second aspect, the present application provides a battery assembly comprising a plurality of back contact solar cells and a snap-in connector of any one of the back contact solar cells described above, the snap-in connector connecting two adjacent back contact solar cells.
Among the buckle formula connector and the battery pack of back contact solar cell of this application embodiment, because the first edge portion of first back contact cell and the second edge portion of second back contact cell live in the both sides of second lateral wall, so first edge portion and second edge portion overlap in the thickness direction of second lateral wall, when first back contact cell of series connection and second back contact cell for first back contact cell and second back contact cell do not have the gap in the thickness direction, thereby can reduce the loss of sunlight in gap department and improve photoelectric conversion efficiency, can also reduce stress bending. In one embodiment, the width of the second sidewall is smaller than that of the first sidewall, so that the shielding of the first cell can be further reduced, and the utilization rate of the solar cell can be increased
Drawings
Fig. 1 is a schematic structural diagram of a snap-in connector of a back contact solar cell according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a snap-in connector of a back contact solar cell according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a snap-in connector of a back contact solar cell according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a snap-in connector of a back contact solar cell according to an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of a snap-in connector of a back contact solar cell according to an embodiment of the present disclosure;
FIG. 6 is a schematic structural diagram of a snap-in connector of a back contact solar cell according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a snap-in connector of a back contact solar cell according to an embodiment of the present application;
FIG. 8 is a schematic structural diagram of a snap-in connector of a back contact solar cell according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a snap-in connector of a back contact solar cell according to an embodiment of the present application.
Description of the main element symbols:
the snap-in connector 10, the first sidewall 11, the first connection surface 111, the connection region 1111, the insulation region 1112, the third insulation layer 1113, the first spacing surface 112, the second sidewall 12, the second connection surface 121, the first insulation layer 122, the second spacing surface 123, the bottom wall 13, the second insulation layer 131, the receiving groove 14, the first back contact cell 21, the first edge portion 210, the first electrode 211, the third electrode 212, the second back contact cell 22, the second edge portion 220, the second electrode 221, and the fourth electrode 222.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1, 2 and 3, a snap-in connector 10 of a back contact solar cell according to an embodiment of the present invention includes a first sidewall 11, the first side wall 11 and the second side wall 12 are disposed opposite to each other on the same side of the bottom wall 13, the first side wall 11, the second side wall 12 and the bottom wall 13 form a receiving groove 14, the receiving groove 14 is configured to receive a first edge portion 210 of the first back-contact cell 21, the first side wall 11 includes a first connection surface 111 facing the second side wall 12, the first connection surface 111 is configured to electrically connect a first electrode 211 of the first back-contact cell 21, the second side wall 12 includes a second connection surface 121 facing away from the first side wall 11, the second connection surface 121 is configured to abut against a second edge portion 220 of the second back-contact cell 22 and electrically connect a second electrode 221 of the second back-contact cell 22, polarities of the first electrode 211 and the second electrode 221 are opposite, and the bottom wall 13 is configured to electrically connect the first connection surface 111 and the second connection surface 121.
According to the snap-in connector 10 of the back contact solar cell in the embodiment of the application, the first edge portion 210 of the first back contact cell 21 and the second edge portion 220 of the second back contact cell 22 are respectively disposed at two sides of the second side wall 12, so that the first edge portion 210 and the second edge portion 220 are overlapped in the thickness direction of the second side wall 12, and when the first back contact cell 21 and the second back contact cell 22 are connected in series, no gap exists between the first back contact cell 21 and the second back contact cell 22 in the thickness direction, the loss of sunlight at the gap can be reduced, the photoelectric conversion efficiency can be improved, and stress bending can be reduced.
In the present embodiment, the first back contact cell 21 further includes a third electrode 212 spaced apart from the first electrode 211, the second back contact cell 22 further includes a fourth electrode 222 spaced apart from the second electrode 221, and the polarities of the third electrode 212 and the fourth electrode 222 are opposite.
In this embodiment, the first electrode 211 is a P-type electrode, and the second electrode 221 is an N-type electrode. It is understood that in other embodiments, the first electrode 211 may be an N-type electrode and the second electrode 221 may be a P-type electrode.
In the present embodiment, the snap-on connector 10 is made of a conductive material. The conductive material is, for example, one or more of silver (Ag), gold (Au), aluminum (Al), copper (Cu), molybdenum (Mo), tungsten (W), nickel (Ni), magnesium (Mg), tin (Sn), and tantalum (Ta). Alternatively, the snap-in connector 10 is electrically conductive. Thus, the snap-in connector 10 itself is conductive, and there is no need to provide a complicated conductive area on the snap-in connector 10, which can improve the production efficiency.
It is understood that, in other embodiments, the snap-in connector 10 may be made of an insulating material, the first connecting surface 111 of the snap-in connector 10 is provided with a first conductive member, the second connecting surface 121 of the snap-in connector 10 is provided with a second conductive member, the bottom wall 13 is provided with a third conductive member, and the third conductive member is electrically connected to the first conductive member and the second conductive member. Therefore, the position of the conductive area can be designed according to needs, and the flexibility is stronger.
Specifically, the first conductive member may be laid on the first connection surface 111, or may be partially embedded in the first sidewall 11 and the other portion is exposed from the first connection surface 111; the second conductive member may be laid on the second connection surface 121, or may be partially embedded in the second sidewall 12 and the other portion is exposed from the second connection surface 121; the third conductive member may be embedded in the third sidewall 13, and electrically connects the first conductive member and the second conductive member inside the snap-in connector 10; the third conductive member may also be at least partially exposed from the snap-in connector 10. The specific arrangement of the first conductive member, the second conductive member, and the third conductive member is not limited herein.
Specifically, the first conductive member, the second conductive member, and the third conductive member may be in a linear shape, a sheet shape, a dot shape, a block shape, a pattern shape, or other shapes. The specific form of the first conductive member, the second conductive member, and the third conductive member is not limited herein.
Optionally, a first conductive layer may be disposed on the first connection face 111. The conductive layer is, for example, a solder paste layer, a conductive adhesive layer, or the like. Thus, the electrical connection between the first connection surface 111 and the first back contact cell 21 is better.
Similarly, a first conductive layer may be provided on the second connection face 121. The conductive layer is, for example, a solder paste layer, a conductive adhesive layer, or the like. Thus, the electrical connection between the second connection surface 121 and the second back contact cell 22 is better.
Referring to fig. 4, optionally, a first insulating layer 122 is disposed on a surface of the second sidewall 12 facing the first sidewall 11. Thus, the surface is prevented from having current, thereby preventing current leakage between the surface and the first back contact cell 21.
Specifically, the first insulating layer 122 may be an insulating glue layer. In this way, the second side wall 12 and the first back contact cell 21 can be fixed while insulating, preventing the snap-in connector 10 from falling off the first back contact cell 21.
Specifically, the first insulating layer 122 may be continuously disposed on the surface of the second sidewall 12 facing the first sidewall 11. Thus, the first insulating layer 122 is dense without holes, so that the insulating effect is better.
Referring to fig. 5, optionally, a second insulating layer 131 is disposed on a surface of the bottom wall 13 facing the first sidewall 11 and the second sidewall 12. Thus, the surface is prevented from having current, thereby preventing current leakage between the surface and the first back contact cell 21.
Specifically, the second insulating layer 131 may be an insulating glue layer. In this way, the bottom wall 13 and the first back contact cell 21 can be fixed while being insulated, and the snap-in connector 10 is prevented from falling off from the first back contact cell 21.
Specifically, the second insulating layer 131 may be continuously provided on the surface of the bottom wall 13 facing the first and second side walls 11 and 12. Thus, the second insulating layer 131 is dense and has no holes, so that the insulating effect is better.
Specifically, in the case where the snap-in connector 10 is prevented from being provided with the first insulating layer 122 and the second insulating layer 131, the first insulating layer 122 may abut against the second insulating layer 131. Thus, there is no gap between the first insulating layer 122 and the second insulating layer 131, and leakage can be further prevented. Meanwhile, the phenomenon that water vapor, dust and the like enter from the gap to affect the service life of the battery is avoided.
Referring to fig. 6, optionally, the first connection surface 111 includes a connection region 1111 and an insulation region 1112, the connection region 1111 and the insulation region 1112 both abut against the first back contact cell 21, the connection region 1111 is electrically connected to the first back contact cell 21, the connection region 1111 is located between the insulation region 1112 and the bottom wall 13, and the insulation region 1112 is provided with a third insulation layer 1113. As such, in the case where the first sidewall 11 is too wide, resulting in an edge contact to the third electrode 212 of the first back contact cell 21, the first electrode 211 is insulated from the third electrode 212.
Specifically, the width of the third insulating layer 1113 ranges from 0.06mm to 50 mm. For example, 0.06mm, 0.07mm, 1mm, 5mm, 10mm, 18mm, 25mm, 48mm, 50 mm. Therefore, the width of the third insulating layer 1113 is within a proper range, the first electrode 211 and the third electrode 212 cannot be insulated due to too small width, and the connection region 1111 is not small in area due to too large width, so that poor connection effect is avoided.
Specifically, the first sidewall 11 may be formed with a groove, the third insulating layer 1113 may be disposed in the groove, and a surface of the third insulating layer 1113 facing the opening of the groove is flush with the first connection surface 111. Thus, the gap between the snap-in connector 10 and the first back contact battery 21 caused by the thickness of the third insulating layer 1113 is reduced, and the phenomenon that water vapor, dust and the like enter from the gap to affect the service life of the battery is avoided.
It is understood that the third insulating layer 1113 may also be directly disposed on the surface of the first sidewall 11 facing the second sidewall 12.
Specifically, the third insulating layer 1113 may be an insulating glue layer. In this way, the first side wall 11 and the first back contact cell 21 can be fixed while being insulated, and the snap-in connector 10 is prevented from falling off from the first back contact cell 21.
Specifically, the third insulating layer 1113 may be continuously disposed in the insulating region 1112. Thus, the third insulating layer 1113 is dense and has no holes, so that the insulating effect is better.
Referring to fig. 7, optionally, the first sidewall 11 includes a first spacing surface 112 facing the second sidewall 12, and the first spacing surface 112 is located between the first connecting surface 111 and the bottom wall 13; the second sidewall 12 includes a second spacing surface 123 facing the first sidewall 11 and corresponding to the first spacing surface 112. In this way, through the first spacing surface 112 and the second spacing surface 123, a gap is formed between the bottom wall 13 and the first back contact cell 21, and under the condition that the size of the snap-in connector 10 is not changed, the shielding of the first back contact cell 21 by the first side wall 11 and the second side wall 12 can be reduced, so that the utilization rate and the photoelectric conversion efficiency of the first back contact cell 21 are conveniently improved.
Optionally, the width of the first spacing surface 112 ranges from 0.01mm to 40 mm; the width of the second spacing surface 123 ranges from 0.01mm to 40 mm. For example, 0.01mm, 0.02mm, 0.08mm, 1mm, 10mm, 15mm, 20mm, 24mm, 30mm, 36mm, 40 mm. Thus, the width of the first spacing surface 112 is within a proper range, so that the effect of reducing shielding caused by too small width is not obvious, and the width of the first connection surface 111 caused by too large width is also prevented from being too small, thereby preventing poor electrical connection with the first back contact battery 21.
Referring to fig. 8 and 9, optionally, the width of the first sidewall 11 is greater than the width of the second sidewall 12, and the difference between the widths of the first sidewall 11 and the second sidewall 12 ranges from 0.01mm to 40 mm. In this way, the shielding of the light receiving surface of the first back contact cell 21 by the second side wall 12 can be reduced, thereby conveniently improving the utilization rate and the photoelectric conversion efficiency of the first back contact cell 21.
Specifically, the width difference between the first side wall 11 and the second side wall 12 is, for example, 0.01mm, 0.02mm, 0.08mm, 1mm, 10mm, 15mm, 20mm, 24mm, 30mm, 36mm, 40 mm. So for the width difference is in suitable scope, and the effect of avoiding the reduction that the width difference undersize leads to sheltering from is not obvious, also can avoid the width difference too big lead to with the first back contact battery 21 the connection stability relatively poor.
Optionally, the width of the first side wall 11 ranges from 0.06mm to 50mm, and the width of the second side wall 12 ranges from 0.05mm to 45 mm. In this manner, the widths of the first and second sidewalls 11 and 12 are in a suitable range, facilitating efficient manufacture of the snap-on connector 10.
Specifically, the width of the first side wall 11 is, for example, 0.06mm, 0.07mm, 1mm, 5mm, 10mm, 15mm, 20mm, 36mm, 40mm, 42mm, 45mm, 49mm, 50 mm.
Specifically, the width of the second side wall 12 is, for example, 0.05mm, 0.06mm, 1mm, 5mm, 10mm, 15mm, 20mm, 36mm, 40mm, 42mm, 45 mm.
Referring to fig. 1, fig. 2 and fig. 8, optionally, the length of the first sidewall 11 is equal to the length of the second sidewall 12, and the length of the first sidewall 11 is less than or equal to the length of the first back contact cell 21. Thus, the snap-in connector 10 is more regular and convenient to manufacture. At the same time, the length of the snap-in connector 10 is prevented from being too long and extending out of the first back contact cell 21, thereby preventing interference with other devices or cells in the battery assembly.
Specifically, the ratio of the length of the first sidewall 11 to the length of the first back contact cell 21 ranges from 1/2 to 1/30. For example 1/2, 1/3, 1/5, 1/10, 1/15, 1/17, 1/20, 1/23, 1/25, 1/28, 1/30. Thus, 2-30 snap-in connectors 10 can be used to connect the first back contact cell 21 and the second back contact cell 22, and the plurality of snap-in connectors 10 are arranged at intervals.
Further, the lengths of the plurality of snap-in connectors 10 may be the same, or may be different, or the lengths of some of the snap-in connectors 10 may be the same and the lengths of some of the snap-in connectors 10 may be different. The relationship between the lengths of the plurality of snap-in connectors 10 is not limited herein.
Further, the length of the snap-on connector 10 ranges from 0.5mm to 300 mm. For example, 0.5mm, 0.6mm, 1mm, 7mm, 8mm, 15mm, 50mm, 100mm, 150mm, 250mm, 300 mm. Thus, the length of the snap-on connector 10 is within a proper range, so that inconvenience in installation due to too small length is avoided, and interference with other devices due to too large length can also be avoided.
Preferably, the length of the snap-on connector 10 ranges from 0.5mm to 210 mm. For example, 0.5mm, 0.6mm, 1mm, 7mm, 8mm, 50mm, 100mm, 150mm, 180mm, 200mm, 210 mm. Therefore, the installation is convenient, other devices are prevented from being interfered, and the whole effect is best.
Further, the pitch of two adjacent snap-on connectors 10 ranges from 0mm to 190 mm. For example 0mm, 1mm, 5mm, 10mm, 50mm, 75mm, 100mm, 140mm, 190 mm. Note that the above data relates to the length of the battery pieces, the length of the snap-in connectors 10, the number of snap-in connectors 10, and the like.
Specifically, the number of the snap-in connectors 10 may be determined based on the number of the pads of the first electrode 211 and the second electrode 221. The first electrode 211 may be a main grid of the first back contact cell 21, or may be an extraction electrode for collecting and flowing out a fine grid of the first back contact cell 21, and a bonding pad may be provided on the extraction electrode. Similarly, the second electrode 221 may be a main grid of the second back contact cell 22, or may be an extraction electrode for collecting the fine grid of the second back contact cell 22, and a bonding pad may be provided on the extraction electrode. It will be appreciated that the pads may be replaced with conductive glue.
Further, each pad may correspond to one snap-in connector 10, or a plurality of pads may correspond to one snap-in connector 10.
Further, when there are a plurality of snap-in connectors 10, an insulating member needs to be provided between two adjacent snap-in connectors 10. The insulating member may be an insulating glue layer. In this way, the second back contact cell 22 is prevented from contacting the surface of the first back contact cell 21 where the snap-in connector 10 is not located when contacting the snap-in connector 10.
Further, the length of the snap-in connectors 10, the distance between two adjacent snap-in connectors 10 is related to the resistance, current matching. For a 210mm battery, the length of the snap-in connectors 10 is optimally 10mm, the distance between two adjacent snap-in connectors 10 is optimally 10mm, and the number of snap-in connectors 10 is optimally 10.
Note that at the two extreme ends of the battery string, a buckle may be provided or not, and only the connection is made by a conventional bus bar manner. The two extreme ends of the cell string refer to the edge portion of the first back contact cell facing away from the second back contact cell, and the edge portion of the last back contact cell facing away from the penultimate back contact cell.
The battery assembly of the embodiment of the application comprises a plurality of back contact solar cells and the snap-in connector 10 of any one of the back contact solar cells, wherein the snap-in connector 10 is connected with two adjacent back contact solar cells.
In the battery module according to the embodiment of the present application, the first edge portion 210 of the first back contact cell 21 and the second edge portion 220 of the second back contact cell 22 are disposed at two sides of the second sidewall 12, so that the first edge portion 210 and the second edge portion 220 overlap in the thickness direction of the second sidewall 12, and when the first back contact cell 21 and the second back contact cell 22 are connected in series, the first back contact cell 21 and the second back contact cell 22 do not have a gap in the thickness direction, and therefore, the loss of sunlight at the gap can be reduced, the photoelectric conversion efficiency can be improved, and stress bending can be reduced.
In summary, the snap-in connector 10 and the battery module of the back contact solar cell according to the embodiment of the present application can realize series connection between back contact solar cells, increase the light receiving area of the back contact solar cell, reduce the loss of sunlight at the gap, and improve the photoelectric conversion efficiency.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (10)
1. A snap-in connector of a back contact solar cell is characterized by comprising a first side wall, a second side wall and a bottom wall, the first side wall and the second side wall are oppositely arranged on the same side of the bottom wall, the first side wall, the second side wall and the bottom wall form a containing groove in a surrounding manner, the receiving groove is used for receiving a first edge part of a first back contact battery, the first side wall comprises a first connecting surface facing the second side wall, the first connecting surface is used for electrically connecting a first electrode of the first back contact cell, the second side wall comprises a second connecting surface deviating from the first side wall, the second connecting surface is used for abutting against the second edge part of the second back contact battery and electrically connecting the second electrode of the second back contact battery, the first electrode and the second electrode have opposite polarities, and the bottom wall is used for electrically connecting the first connection surface and the second connection surface.
2. A snap-on connector for a back-contact solar cell according to claim 1, wherein the snap-on connector is electrically conductive and a first insulating layer is provided on the surface of the second sidewall facing the first sidewall.
3. A snap-on connector for a back contact solar cell according to claim 1, wherein the snap-on connector is electrically conductive and a second insulating layer is provided on the surface of the bottom wall facing the first and second side walls.
4. The snap-in connector of a back contact solar cell of claim 1, wherein the first connection surface comprises a connection region and an insulation region, wherein the connection region and the insulation region both abut against the first back contact cell, the connection region is electrically connected to the first back contact cell, the insulation connection region is located between the insulation region and the bottom wall, and the insulation region is provided with a third insulation layer.
5. A snap-on connector of a back contact solar cell according to claim 1, wherein the first sidewall comprises a first spacing face facing the second sidewall, the first spacing face being located between the first connection face and the bottom wall; the second side wall comprises a second spacing surface facing the first side wall and corresponding to the first spacing surface.
6. A snap-on connector for a back contact solar cell in accordance with claim 5, wherein the width of the first spacing surface ranges from 0.01mm to 40 mm; the width range of the second spacing surface is 0.01mm-40 mm.
7. A snap-on connector for a back contact solar cell in accordance with claim 1, wherein the width of the first sidewall is greater than the width of the second sidewall, and the difference in width between the first sidewall and the second sidewall is in the range of 0.01mm-40 mm.
8. A snap-on connector for a back contact solar cell in accordance with claim 7, wherein the width of the first sidewall is in the range of 0.06mm-50mm and the width of the second sidewall is in the range of 0.05mm-45 mm.
9. A snap-on connector for a back contact solar cell in accordance with claim 1, wherein the length of the first sidewall is equal to the length of the second sidewall, and the length of the first sidewall is less than or equal to the length of the first back contact cell.
10. A battery assembly comprising a plurality of back contact solar cells and the snap-in connector of a back contact solar cell of any of claims 1-9, said snap-in connector connecting adjacent two of said back contact solar cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111189768.4A CN113764538A (en) | 2021-10-11 | 2021-10-11 | Buckle type connector of back contact solar cell and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111189768.4A CN113764538A (en) | 2021-10-11 | 2021-10-11 | Buckle type connector of back contact solar cell and battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN113764538A true CN113764538A (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111189768.4A Pending CN113764538A (en) | 2021-10-11 | 2021-10-11 | Buckle type connector of back contact solar cell and battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115172499A (en) * | 2022-06-07 | 2022-10-11 | 深圳赛能数字能源技术有限公司 | Back contact battery, manufacturing method thereof, battery assembly and photovoltaic system |
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2021
- 2021-10-11 CN CN202111189768.4A patent/CN113764538A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115172499A (en) * | 2022-06-07 | 2022-10-11 | 深圳赛能数字能源技术有限公司 | Back contact battery, manufacturing method thereof, battery assembly and photovoltaic system |
| CN115172499B (en) * | 2022-06-07 | 2024-03-29 | 深圳赛能数字能源技术有限公司 | Back contact battery, manufacturing method thereof, battery assembly and photovoltaic system |
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