CN111430470A - Foldable bus bar, circuit connection structure and tile folding assembly - Google Patents
Foldable bus bar, circuit connection structure and tile folding assembly Download PDFInfo
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- CN111430470A CN111430470A CN202010321149.5A CN202010321149A CN111430470A CN 111430470 A CN111430470 A CN 111430470A CN 202010321149 A CN202010321149 A CN 202010321149A CN 111430470 A CN111430470 A CN 111430470A
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- 238000003466 welding Methods 0.000 claims description 113
- 230000007704 transition Effects 0.000 claims description 17
- 230000007306 turnover Effects 0.000 claims description 8
- 238000005476 soldering Methods 0.000 claims 2
- 230000005611 electricity Effects 0.000 abstract description 7
- 238000010248 power generation Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002699 waste material 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
- H01L31/02—Details
- H01L31/02002—Arrangements for conducting electric current to or from the device in operations
- H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
- H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
- H01L31/0201—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising specially adapted module bus-bar structures
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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
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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
- 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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Abstract
The invention provides a foldable bus bar which comprises a body, wherein a plurality of connecting blocks are arranged on one side of the body, and the connecting blocks are welded with pad points on one side, close to an output end, of the front side of a battery piece in a positioning mode and are folded with the body to the back side of the battery piece along one side edge, close to the output end, of the battery piece. The utility model also provides an adopt above-mentioned collapsible the circuit connection structure that the busbar connects to the battery piece and adopt this circuit connection structure to carry out the shingle assembly of electricity connection. The foldable bus bar not only improves the connection mode of the circuit of the laminated assembly, but also can improve the utilization rate of the area of the battery piece and improve the overall output power of the laminated assembly; under the condition of keeping the creepage distance and the shingle assembly unchanged, the bus bar of the structure can increase the length of the battery string by about 4-10mm and the effective light receiving area by 0.2-0.5%, so that the assembly power can be increased by about 1-2.5W on the standard type shingle assembly.
Description
Technical Field
The invention belongs to the technical field of stacking of solar energy tile-folded assemblies, and particularly relates to a foldable bus bar, a circuit connection structure and a tile-folded assembly.
Background
The design of a negative end circuit in the existing laminated assembly mainly comprises the steps of welding a bus bar to a back electrode of a battery piece and then carrying out bus connection, but the design can cause that the last battery piece only can serve as a carrier of a connecting circuit and cannot generate electricity. For the power generation base of the stack assembly modules placed in large-area batch, if the circuit design structure of the stack assembly cannot be improved, the last cell in each stack assembly module cannot generate power, so that a plurality of cells in a plurality of groups of stack assembly modules cannot be used for generating power, the whole cell waste is serious, and the whole output power is difficult to improve. With the development of the photovoltaic market, the application of large-size cells is gradually improved, the current of a single cell is increased, and if the existing circuit design is adopted, the utilization rate of the area of the cell is low, so that the output power gain is difficult, and the production cost is increased.
Chinese patent CN209282222U, a circuit connection structure of a laminated assembly, proposes that a special-shaped bus bar is electrically connected from the last cell in the negative end of the laminated assembly, so as to draw current for filtering and generating electricity. However, the bus bar with such a structure occupies more creepage distance, that is, the distance from the last cell to the edge of the module is increased, so that the occupied area of the laminated module is increased, and the power generation efficiency of the module is reduced under the condition of the same power. The solder joint undersize that ladder arch and through-hole formed in the busbar structure that this patent provided can't turn over the busbar to reduce the busbar and occupy creepage distance.
Disclosure of Invention
The invention provides a foldable bus bar, a circuit connecting structure and a tile-folded assembly, which are particularly suitable for electric connection of large-size battery plates and solve the technical problems that the creepage distance occupied by the circuit connecting structure at the negative end of the tile-folded assembly is large due to unreasonable structural design of the bus bar in the prior art, the effective light receiving area of the tile-folded assembly is reduced, and the whole output power gain is difficult.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a can turn over and roll over busbar, includes the body one side has a plurality of connecting blocks, the connecting block openly with the battery piece be close to the pad point pair position welding of output one side and with the body is followed together the battery piece is close to output one side edge to the battery piece back of the body turns over and turns over. The creepage distance that the bus bar occupies the assembly can be reduced, the length of the battery string is increased under the condition that the creepage distance is kept unchanged, and the light receiving area of the battery string is improved, so that the effective power of the assembly is improved.
Furthermore, the connecting block comprises a welding section and extension sections, wherein the welding section and the extension sections are integrally connected, the extension sections are arranged at two ends of the welding section, and the welding section is far away from the body and is in point-to-point welding with a pad point on one side, close to the output end, of the front face of the battery piece; the extension section is arranged close to one side of the body, and part of section surface of the extension section close to one side of the body is folded on the back surface of the battery piece together with the body along the width direction of the extension section; the welding section plane structure at least covers the pad point. The circuit connection mode of the shingled assembly is further improved by turning over the bus bar, the turned-over surface of the bus bar is hidden on the back surface of the battery piece under the condition that the last battery piece at the negative electrode end is ensured to generate electricity, and the bus bar body structure, the terminal welding crater and the like cannot be seen on the front surface of the battery piece. The welding position of pad point covers in the battery piece completely, prevents that the welding point is incomplete by naked hourglass, guarantees welding quality, also is applicable to the battery piece of various dimensions simultaneously.
Preferably, the length and the width of the welding section are both greater than the maximum length and the width of the pad point, and one side of the welding section, which is close to the extension section, is flush with the outer side of the pad point. The welding quality is ensured, and the hidden cracking degree of the assembly welding can be reduced.
Preferably, the extension sections are arranged on two sides of the length direction of the welding section in parallel and symmetrically; the extension section is perpendicular to the welding section; the welding section and the body are arranged in parallel. The symmetrical structure of the extension section is convenient to process, is more favorable for improving the welding quality of the bus bar and ensures the welding effect; simultaneously, the distance between the extension sections is a vacant through hole, the battery piece can be prevented from being shielded during welding after the extension sections are turned over, the power generation of the battery piece is prevented from being influenced, and meanwhile, the symmetrically arranged structure can improve the connection stability of the bus bars. The vertically arranged structure is more convenient for the turnover operation; the welding section is arranged in parallel with the length direction of the body and the outer edge of the battery piece, so that the accuracy of the welding position of the body can be further ensured; the whole structure is simple, the turnover is convenient, and the processing is also facilitated.
Furthermore, a transition section is arranged between the welding section and the extension section, and the transition section is respectively connected with the welding section and the extension section. Not only be favorable to adjusting the butt joint welding of welding section and pad, be favorable to the processing of whole connecting block moreover.
Further, the length of the extension section folded on the back of the battery piece is larger than the length of the extension section arranged on the front of the battery piece. The purpose is in order to turn over the back busbar of back and can be totally at the back of battery piece, avoid local not pressing the battery piece and lead to the atress inhomogeneous, still can avoid leading to the battery piece to break simultaneously.
Preferably, the width and thickness of the welding section are the same as the width and thickness of the extension section; the length of the welding section is not more than the inner side distance between the adjacent extension sections and is less than the length of the extension sections; the thickness of the welding section is the same as that of the body; the width of the body is increased by 4-10 mm. The thickness of the whole bus bar is uniform, the bus bar is ensured to be connected with the front side of the battery piece, and meanwhile, the creepage distance occupied by the bus bar is reduced to the greatest extent, so that the length of the battery string is increased, and the light receiving area of the battery string is increased. Under the condition of guaranteeing that body thickness is the same with extension section, welding section thickness, increase body width size, and then increased the sectional area of busbar, the generating heat of busbar department when having reduced outdoor power generation, increase of service life.
A circuit connection structure adopts the bus bar to perform circuit connection on the battery pieces.
Further, executing point-to-point welding of the welding section and the pad on the side, close to the output end, of the front face of the battery piece; and folding the body and the extension section together to the back of the battery piece to be connected with an insulating strip arranged on the back of the battery piece to form a circuit channel.
A laminated assembly is provided, wherein the last battery piece on the side of the negative end of the assembly is electrically connected by the circuit connection structure.
1. The turnover bus bar provided by the invention is particularly suitable for electric connection of large-size battery pieces, and the bus bar is in seamless electric connection with the front sides of the battery pieces by the adaptive welding of the welding section and the pad point in the front side of the last battery piece at the cathode end of the imbricated assembly; and then the connection surface between the welding section and the extension section is turned over along the width direction of the extension section, so that the extension section part and the body are turned over along the edge of the battery piece, the length of the battery string can be increased by about 4-10mm under the condition of keeping the creepage distance of the assembly unchanged, and the light receiving area of the battery string can be further increased.
For the size of conventional busbar, the thickness of the busbar of this application is unchangeable, increases the width of body, proposes simultaneously along the width direction of the extension section that the perpendicular to body set up and makes the extension section part overturn together with the body, not only can reduce the latent degree of splitting of subassembly welding, the generating heat of busbar department when also can reducing outdoor electricity generation simultaneously.
2. The circuit connection structure further improves the circuit connection mode of the laminated assembly by turning the bus bar, hides the turned-over surface of the bus bar at the back of the battery piece under the condition of ensuring the power generation of the last battery piece at the negative end, can reduce the area of the area occupied by the creepage distance, and further can increase the length of the battery string to improve the light receiving area of the laminated assembly, thereby improving the effective power of the assembly.
3. The invention provides a laminated assembly, wherein the front surface of the last battery piece at the negative end of the assembly is welded with a welding section in a bus bar connecting block and a pad spot on the front surface, a transition section for connecting the welding section and an extension section is arranged on the front surface of the battery piece together with a part of the extension section and the welding section, and the rest extension section and a body are folded on the back surface of the battery piece together and are isolated by an insulating strip to prevent short circuit; meanwhile, the bus bar body structure, the terminal welding crater and the like cannot be seen on the front surface of the battery piece. The electric connection mode welded laminated assembly formed by the foldable bus bars can increase the length of the battery string by about 4-10mm on the whole under the condition of keeping the creepage distance and the area of the assembly unchanged, and the effective light receiving area of the laminated assembly can be increased by 0.2-0.5% by the increased length of the battery string. With the increased length of the battery string in this circuit connection, the module power can be increased by about 1-2.5W on a standard version of the shingle module.
Drawings
FIG. 1 is a schematic structural view of a foldable bus bar according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a bus bar welded to the front surface of a cell according to an embodiment of the invention;
FIG. 3 is an enlarged view of section A of one embodiment of the present invention;
fig. 4 is a structural view illustrating a back side welding of a bus bar and a battery sheet according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a transition section of another embodiment of the present invention.
In the figure:
100. bus bar 110, body 120, connecting block
121. Welding section 122, transition section 123 and extension section
200. Cell piece 210, front surface 220, pad point
230. Back side 300, insulating strip
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
The present embodiment provides a foldable bus bar 100 for a laminated assembly, as shown in fig. 1, which includes a body 110 having a rectangular structure, a plurality of connection blocks 120 arranged side by side are disposed on one side of the body 110, and in the process of manufacturing the laminated assembly, a structure diagram of a welding cooperation between the bus bar 100 and a battery cell 200 is shown in fig. 2, the connection blocks 120 are welded to pad points 220 on a side of a front surface 210 of the battery cell 200 close to an output end in an aligned manner and are folded back along a side edge of the battery cell 200 close to the output end together with the body 110 toward a back surface 230 of the battery cell 200. The foldable bus bar 100 in this embodiment can not only reduce the creepage distance that the bus bar 100 occupies the cathode side of the tile-folded assembly, but also increase the length of the battery string and improve the light receiving area of the battery string under the condition of keeping the creepage distance unchanged, thereby improving the effective power of the tile-folded assembly.
Specifically, as shown in fig. 2, each connecting block 120 includes a welding segment 121 integrally connected to each other and an extension segment 123 disposed at two ends of the welding segment 121, wherein the welding segment 121 is disposed away from the body 110 and is welded to a pad point 220 on a side of the front surface 210 of the battery piece 200 close to the output end in an aligned manner. The extension 123 is disposed near one side of the body 110, a part of a section surface of the extension 123 near one side of the body 110 is folded over the back surface 230 of the battery piece 200 along the width direction of the extension 123 together with the body 110, and is welded to the insulating strip 300 disposed on the back surface 230, the insulating strip 300 is used to isolate the bus bar 100 from the battery piece 200, so as to prevent short circuit, and the structure of the bus bar 100 welded and matched with the back surface 230 of the battery piece 200 is shown in fig. 4. The circuit connection mode of the shingled assembly can be further improved by folding and welding the bus bar 100 for current collection, and under the condition that the power generation of the last battery piece 200 at the negative end is ensured, the folded side of the bus bar 100 is hidden on the back side 230 of the battery piece 200, so that the body 110 structure, the terminal welding crater and the like of the bus bar 100 cannot be seen on the front side of the battery piece 200.
Preferably, an obliquely arranged or arc-arranged transition section 122 is further arranged between the welding section 121 and the extension section 123, the obliquely arranged transition section 122 is shown in fig. 3, the arc-structured transition section 122 is shown in fig. 5, and the transition section 122 connects the welding section 121 and the extension section 123 respectively, which not only facilitates adjusting the position of the welding section 121 and the pad point 220 in alignment welding, but also facilitates processing of the integral connecting block 120.
Further, the planar structure of the welding segments 121 at least covers the area of the pad points 220, that is, each welding segment 121 completely covers the welding position of the corresponding pad point 220 in the front surface 210 of the battery piece 200, so as to prevent the incomplete welding point from being exposed, ensure the welding quality, and be also suitable for the structure of the pad points 220 of the battery pieces 200 with various dimensions.
Preferably, the welding section 121 and the pad point 220 are arranged in parallel in the length direction, that is, the welding section 121 and the body 110 are arranged in parallel in the length direction, both the length and the width of the welding section 121 are greater than the maximum length and the maximum width of the pad point 220, and one side of the welding section 121 close to the extension section 123 is arranged in parallel with the outer side of the pad point 220, so that the welding quality can be ensured, and the welding hidden crack degree of the laminated assembly can be reduced.
Furthermore, the extension sections 123 are arranged in parallel and symmetrically on two sides of the welding section 121 in the length direction, that is, the symmetrical structure of the extension sections 123 is not only convenient for processing, but also more beneficial for improving the welding quality of the bus bar 100, and ensures the welding effect; meanwhile, the distance between the extension sections 123 is a vacant through hole, the through hole penetrates through the thickness of the connecting block 120, the through hole structure is the same as the shape structure formed by the extension sections 123, the body 110 and the welding section 121, the bus bar 100 can be prevented from shielding the front 210 of the battery piece 200 during welding after being turned over, the power generation of the battery piece 200 is prevented from being influenced, and meanwhile, the symmetrically arranged structure can improve the connection stability of the bus bar 100.
Preferably, the extension 123 is perpendicular to the welding segment 121, and since the welding segment 121 is parallel to the body 110, the extension 123 is also perpendicular to the length direction of the body 110, and the connection block 120 composed of the welding segment 121, the transition segment 122 and the extension 123 is processed in the same plane as the body 110. The extension section 123 vertically arranged is more convenient for folding operation; the welding section 121 is arranged in parallel with the length direction of the body 110 and the outer edge of the battery piece 200, so that the accuracy of the welding position of the body 110 can be further ensured; the foldable bus bar 100 has a simple overall structure, and is not only convenient to fold, but also convenient to process.
Further, as shown in fig. 3, the length D1 of the extension 123 folded on the back side 230 of the battery piece 200 is greater than the length D2 of the extension 123 placed on the front side 210 of the battery piece 200, and preferably, the length D1 of the extension 123 placed on the back side 230 is greater than the sum of the length D2 of the extension 123 placed on the front side 210 and the vertical distance D3 of the transition 122 perpendicular to the welding section 121, which are set so that the bus bar 100 can be completely on the back side 230 of the battery piece 200 after folding, uneven stress on the bus bar 100 due to partial non-pressing of the extension 123 on the battery piece 200 is avoided, and the battery piece 200 is also prevented from being cracked, and the structure of the bus bar 100 in welding fit with the back side 230 of the battery piece 200 is shown in fig. 4.
Further, the width and thickness of the welding segment 121 are the same as those of the extension segment 123, and the thickness of the welding segment 121 is the same as that of the body 110. The length of the welding segment 121 is not greater than the inside distance between adjacent extension segments 123 and less than the length of the extension segments 123, and preferably, the length of the welding segment 121 is the same as the length of the pad point 220 and the width between adjacent extension segments 123, while the length of the extension segments 123 is greater than the length of the welding segment 121. This is because the structure can make the entire thickness of the bus bar 100 uniform, and the creepage distance occupied by the bus bar 100 is minimized to increase the length of the battery string and further increase the light receiving area of the battery string while ensuring the connection between the bus bar 100 and the front surface 210 of the battery sheet 200.
In the present embodiment, since the size of the battery cell 200 is larger than the conventional size so that the flowing current thereof increases, under the condition that the thickness of the welding section 121 is the same as that of the body 110, it is necessary to increase the cross-sectional area of the body 110 of the bus bar 100 so as to adjust the width of the body 110, preferably, the width of the body 110 is increased by 4-10 mm. The arrangement ensures that the thickness of the body 110 is the same as that of the welding section 121, the transition section 122 and the extension section 123, the width of the body 110 is increased, the sectional area of the bus bar 100 is increased, heat generation at the bus bar 100 during outdoor power generation is reduced, and the service life is prolonged.
The foldable bus bar 100 provided by the invention is particularly suitable for electric connection of large-size battery pieces 200, and the bus bar 100 is in seamless electric connection with the front surfaces of the battery pieces 200 through the adaptive welding of the welding section 121 and the pad point 220 in the front surface 210 of the last battery piece 200 at the negative end of the imbricated assembly; and then the connection surface between the welding section 121 and the extension section 123 is turned over along the width direction of the extension section 123, so that the extension section 123 and the body 110 are turned over along the edge of the battery piece 200, the length of the battery string can be increased by about 4-10mm under the condition of keeping the creepage distance of the assembly unchanged, and the light receiving area of the battery string can be further increased.
A circuit connection structure, as shown in fig. 2, which uses the bus bar 100 as described above to connect the circuit of the battery piece 200, and includes the following steps:
firstly, the welding section 121 in the connecting block 120 is welded with the pad point 220 on the side close to the output end in the front surface 210 of the last cell 200 of the cathode of the stack assembly in an alignment manner, so as to ensure that the pad point 220 is completely covered by the welding section 121.
Next, the insulating bar 300 is arranged on the side of the back surface 230 of the battery piece 200 close to the pad point and along the length direction of the bus bar 100 body 110, one part of the insulating bar 300 in the width direction is connected with the back surface 230 of the battery piece 200, the other part of the insulating bar 300 extends outwards, the width of the insulating bar 300 is greater than the width of the bus bar 100 arranged on the side of the back surface 230 of the battery piece 200, and the length of the insulating bar 300 is not less than the length of the bus bar 100.
Again, the bus bar 100 is folded along the width direction of the extension 123, that is, part of the length of the extension 123 is placed on the front 210 of the battery piece 200 together with the transition 122 and the welding section 121, and another part of the length of the extension 123 is folded along with the body 110 and welded on the insulating strip 300 placed on the back 230 of the battery piece 200, so that the length D1 of the extension 123 folded on the back 230 of the battery piece 200 is greater than the length D2 of the extension 123 placed on the front 210 of the battery piece 200. Preferably, the length D1 of the extension 123 disposed on the back side 230 is greater than the sum of the length D2 of the extension 123 disposed on the front side 210 and the vertical distance D3 of the transition 122 perpendicular to the weld segment 121. Further, the body 110 and the extension 123 are folded over to the rear surface 230 of the battery cell 200 together with the segment surface and connected to an insulating strip disposed on the rear surface 230 of the battery cell 200 to form a circuit path.
By turning over the bus bar 100, the circuit connection mode of the laminated assembly is further improved, under the condition that the last battery piece 200 at the negative end is ensured to generate electricity, the turned-over side of the bus bar 100 is hidden on the back side of the battery piece 200, the area of the area where the creepage distance is occupied can be reduced by the bus bar 100, the length of a battery string can be further increased, about 4-10mm can be integrally increased, the light receiving area of the laminated assembly is increased, and the effective power of the assembly is increased.
In the present embodiment, the foldable bus bar 100 forms an electrical connection, which increases the length of the battery string by about 4-10mm, and increases the effective light receiving area of the laminated assembly by 0.2-0.5% for the length of the battery string. With the increased length of the battery string in this circuit connection, the module power can be increased by about 1-2.5W on a standard version of the shingle module.
A laminated assembly is provided, wherein the last battery piece on the side of the negative end of the assembly is electrically connected by the circuit connection structure.
1. The turnover bus bar provided by the invention is particularly suitable for electric connection of large-size battery pieces, and the bus bar is in seamless electric connection with the front sides of the battery pieces by the adaptive welding of the welding section and the pad point in the front side of the last battery piece at the cathode end of the imbricated assembly; and then the connection surface between the welding section and the extension section is turned over along the width direction of the extension section, so that the extension section part and the body are turned over along the edge of the battery piece, the length of the battery string can be increased by about 4-10mm under the condition of keeping the creepage distance of the assembly unchanged, and the light receiving area of the battery string can be further increased.
For the size of conventional busbar, the thickness of the busbar of this application is unchangeable, increases the width of body, proposes simultaneously along the width direction of the extension section that the perpendicular to body set up and makes the extension section part overturn together with the body, not only can reduce the latent degree of splitting of subassembly welding, the generating heat of busbar department when also can reducing outdoor electricity generation simultaneously.
2. The circuit connection structure further improves the circuit connection mode of the laminated assembly by turning the bus bar, hides the turned-over surface of the bus bar at the back of the battery piece under the condition of ensuring the power generation of the last battery piece at the negative end, can reduce the area of the area occupied by the creepage distance, and further can increase the length of the battery string to improve the light receiving area of the laminated assembly, thereby improving the effective power of the assembly.
3. The invention provides a laminated assembly, wherein the front surface of the last battery piece at the negative end of the assembly is welded with a welding section in a bus bar connecting block and a pad spot on the front surface, a transition section for connecting the welding section and an extension section is arranged on the front surface of the battery piece together with a part of the extension section and the welding section, and the rest extension section and a body are folded on the back surface of the battery piece together and are isolated by an insulating strip to prevent short circuit; meanwhile, the bus bar body structure, the terminal welding crater and the like cannot be seen on the front surface of the battery piece. The electrically connected welded shingle assembly formed by the foldable bus bars 100 increases the length of the cell string by about 4-10mm as a whole, and increases the effective light receiving area of the shingle assembly by 0.2-0.5% while maintaining the creepage distance and the assembly area unchanged. With the increased length of the battery string in this circuit connection, the module power can be increased by about 1-2.5W on a standard version of the shingle module.
The embodiments of the present invention have been described in detail, and the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. The utility model provides a can turn over and roll over busbar, includes the body, its characterized in that body one side has a plurality of connecting blocks, the connecting block openly with the battery piece be close to the pad point pair position welding of output one side and with the body is followed together the battery piece is close to output one side edge to the battery piece back of the body turns over and turns over.
2. The foldable bus bar according to claim 1, wherein the connecting block comprises a welding section and extension sections, the welding section is integrally connected with the extension sections, the extension sections are arranged at two ends of the welding section, the welding section is arranged away from the body and is welded with a pad point on the side, close to the output end, of the front surface of the battery piece in an aligned mode; the extension section is arranged close to one side of the body, and part of section surface of the extension section close to one side of the body is folded on the back surface of the battery piece together with the body along the width direction of the extension section; the welding section plane structure at least covers the pad point.
3. A foldable busbar according to claim 2, wherein the length and width of the welding section are greater than the maximum length and width of the pad point, and the welding section is disposed flush with the outer side of the pad point near one side of the extension section.
4. A foldable bus bar according to claim 2 or 3, wherein the extension sections are arranged in parallel and symmetrically on both sides in the length direction of the welding section;
the extension section is perpendicular to the welding section;
the welding section and the body are arranged in parallel.
5. A foldable bus bar according to claim 4, wherein a transition section is further provided between the welding section and the extension section, the transition section connecting the welding section and the extension section, respectively.
6. A foldable bus bar according to any one of claims 2 to 3 and 5, wherein the length of the extended section folded back on the back side of the cell sheet is longer than the length thereof placed on the front side of the cell sheet.
7. A foldable busbar according to claim 6, wherein said welded section has the same width and thickness as said elongated section;
the length of the welding section is not more than the inner side distance between the adjacent extension sections and is less than the length of the extension sections;
the thickness of the welding section is the same as that of the body;
the width of the body is increased by 4-10 mm.
8. A circuit connection structure, wherein a cell is electrically connected using the bus bar according to any one of claims 1 to 7.
9. The circuit connecting structure according to claim 8, wherein the soldering of the soldering section to the pad point on the side of the front surface of the battery piece close to the output end is performed;
and folding the body and the extension section together to the back of the battery piece to be connected with an insulating strip arranged on the back of the battery piece to form a circuit channel.
10. A stack assembly characterized in that the last cell on the negative terminal side of the stack assembly is electrically connected by the circuit connecting structure according to any one of claims 8 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010321149.5A CN111430470A (en) | 2020-04-22 | 2020-04-22 | Foldable bus bar, circuit connection structure and tile folding assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010321149.5A CN111430470A (en) | 2020-04-22 | 2020-04-22 | Foldable bus bar, circuit connection structure and tile folding assembly |
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| CN111430470A true CN111430470A (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010321149.5A Pending CN111430470A (en) | 2020-04-22 | 2020-04-22 | Foldable bus bar, circuit connection structure and tile folding assembly |
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| WO2009019940A1 (en) * | 2007-08-07 | 2009-02-12 | Sharp Kabushiki Kaisha | Solar cell module |
| CN207611781U (en) * | 2017-12-14 | 2018-07-13 | 阿特斯阳光电力集团有限公司 | Photovoltaic module |
| CN109980035A (en) * | 2017-12-14 | 2019-07-05 | 阿特斯阳光电力集团有限公司 | Photovoltaic module |
| CN211929498U (en) * | 2020-04-22 | 2020-11-13 | 环晟光伏(江苏)有限公司 | Turnover bus bar |
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2020
- 2020-04-22 CN CN202010321149.5A patent/CN111430470A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009019940A1 (en) * | 2007-08-07 | 2009-02-12 | Sharp Kabushiki Kaisha | Solar cell module |
| CN207611781U (en) * | 2017-12-14 | 2018-07-13 | 阿特斯阳光电力集团有限公司 | Photovoltaic module |
| CN109980035A (en) * | 2017-12-14 | 2019-07-05 | 阿特斯阳光电力集团有限公司 | Photovoltaic module |
| CN211929498U (en) * | 2020-04-22 | 2020-11-13 | 环晟光伏(江苏)有限公司 | Turnover bus bar |
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