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CN-224218749-U - Welding strip turnover type photovoltaic module

CN224218749UCN 224218749 UCN224218749 UCN 224218749UCN-224218749-U

Abstract

The utility model relates to a welding strip turnover type photovoltaic module which comprises battery pieces, wherein adjacent battery pieces are connected through welding strips along the main grid direction of the battery pieces and form a battery piece string, the welding strips led out from one end of the battery piece string are positive poles and are connected through positive bus bars, the welding strips led out from the other end of the battery piece string are negative poles and are connected through negative bus bars, the welding strips at the two ends of the battery piece string are bent 180 degrees to enable the positive bus bars and the negative bus bars to be located on the back surface of the battery pieces, and the part of the welding strips bent to the back surface of the battery piece is separated from the back surface of the battery piece through insulating cushion strips or the parts of the welding strips bent to the back surface of the battery piece are separated through insulating cushion strips. The bus bar is more flexible in design and use, and can be used for converging, so that the collection capacity of electrons can be increased to a certain extent, and the assembly power and the assembly efficiency are improved.

Inventors

  • Yin Qiaoxia
  • Ni Dongren
  • SUN TIEDUN
  • LIU QIANG

Assignees

  • 常州亿晶光电科技有限公司

Dates

Publication Date
20260508
Application Date
20250530

Claims (10)

  1. 1. The welding strip turnover type photovoltaic module comprises battery pieces (1), wherein adjacent battery pieces (1) are connected through welding strips (2) along the main grid direction of the battery pieces (1) and form a battery piece string, the welding strips (2) led out from one end of the battery piece string are positive poles and are connected through positive pole bus bars (3), and the welding strips (2) led out from the other end of the battery piece string are negative poles and are connected through negative pole bus bars (4), and the photovoltaic module is characterized in that: The welding strips (2) at two ends of the battery piece string are bent 180 degrees, so that the positive electrode bus bar (3) and the negative electrode bus bar (4) are positioned on the back surface of the battery piece (1); The part of the welding strip (2) bent to the back of the battery piece (1) is separated from the back of the battery piece (1) through an insulating filler strip (12), or the part of the welding strip (2) bent to the back of the battery piece (1) is separated through the insulating filler strip (12).
  2. 2. The welding strip turnover type photovoltaic module of claim 1, wherein a welding strip (2) connected with the positive electrode bus bar (3) is arranged on the front surface of a battery piece (1), the welding strip (2) forms a positive electrode U-shaped groove (5) when being bent, and the side part of the battery piece (1) is clamped in the positive electrode U-shaped groove (5), and the gasket strip (12) is also arranged in the positive electrode U-shaped groove (5) and is clamped between the welding strip (2) and the back surface of the battery piece (1); The welding strip (2) connected with the negative electrode bus bar (4) is bent in a direction away from the battery piece (1) to form a negative electrode U-shaped groove (6), the filler strip (12) is clamped in the negative electrode U-shaped groove (6), and two sides of the filler strip are connected with the groove wall of the negative electrode U-shaped groove (6).
  3. 3. The welding strip turnover type photovoltaic module of claim 2, wherein the length direction of the filler strip (12) is provided with a penetrating hole (13); the end of the welding strip (2) passes out of the perforation (13).
  4. 4. The welding strip turnover type photovoltaic module of claim 3, wherein the bending part of the welding strip (2) is attached to the filler strip (12).
  5. 5. The welding strip turnover type photovoltaic module of claim 4, wherein said perforated hole (13) is deviated to one side of the filler strip (12) to divide said filler strip (12) into a large part and a small part; The welding strip (2) is clamped with the wider part of the filler strip (12).
  6. 6. The welding strip turnover type photovoltaic module according to claim 1, wherein the middle partition of the cell string divides the cell string into an upper cell string (7) and a lower cell string (8); an upper welding strip (9) is led out from the upper cell string (7) to the lower cell string (8); The lower welding strip (10) is led out from the lower battery piece string (8) to the upper battery piece string (7); The upper welding strip (9) and the lower welding strip (10) have the same polarity and are staggered relatively; The polarities of the welding strips (2) at the two ends of the battery piece string are the same; The middle bus bar (11) for connecting the upper welding strip (9) or the lower welding strip (10) is positioned on the back of the battery piece (1).
  7. 7. The welding strip turnover type photovoltaic module of claim 6, wherein said upper welding strip (9) is reversely bent by 180 DEG through the perforation (13); the middle bus bar (11) is positioned on the back surface of the upper cell string (7); The lower welding strip (10) passes through the perforation (13) and is connected with the middle bus bar (11).
  8. 8. The welding strip turnover type photovoltaic module of claim 6, wherein said lower welding strip (10) is reversely bent by 180 ° through the perforation (13); The middle bus bar (11) is positioned on the back surface of the lower cell string (8); The upper welding strip (9) passes through the perforation (13) and is connected with the middle bus bar (11).
  9. 9. The welding strip turnover type photovoltaic module of claim 6, wherein said upper welding strip (9) is reversely bent by 180 DEG through the perforation (13); The lower welding strip (10) passes through the perforation (13) and is reversely bent for 180 degrees; the middle bus bar (11) is positioned on the back sides of the upper cell string (7) and the lower cell string (8), and extends to the same length as the upper cell string (7) and the lower cell string (8).
  10. 10. The welding strip turnover type photovoltaic module of claim 9, wherein said perforation (13) is located at the center of the filler strip (12).

Description

Welding strip turnover type photovoltaic module Technical Field The utility model relates to the technical field of solar photovoltaic modules, in particular to a welding strip turnover type photovoltaic module. Background Along with the rapid development of photovoltaic technology, the improvement of the power and the power generation efficiency of photovoltaic cells becomes an important research direction of industry. Optimizing the internal structural design of the assembly is one of the key means for improving the performance on the premise of not changing the size of the photovoltaic cell. Currently, the mainstream technology increases the effective power generation area of the battery cells by reducing the typesetting pitch (such as zero pitch or negative pitch) of the battery cells and compressing the width dimension of the bus bars, thereby increasing the power density of the assembly. However, this design has the following drawbacks: 1. the reduction of the spacing of the battery pieces or the compression of the bus bar size leads to the components being more susceptible to mechanical stress during production, transportation and installation, thereby causing hidden cracking or breaking of the battery pieces and reducing the reliability and service life of the components. 2. The current mainstream half-chip component adopts a serial-parallel circuit design, and bus bars are additionally added between two groups of parallel strings to realize current collection. The resistance loss of the component is increased, the effective light receiving area is reduced, and the overall conversion efficiency of the photovoltaic component is affected. Therefore, how to reduce the risk of hidden cracking and optimize the bus bar design while ensuring the high power density and the power generation efficiency of the assembly becomes a key problem to be solved in the photovoltaic technology field. The prior art has not provided an optimization scheme capable of not only achieving high energy output but also improving the reliability of the assembly, and innovative structural design or technological improvement is needed. Disclosure of utility model In order to solve the technical problems in the background art, the utility model discloses a welding strip turnover type photovoltaic module. The utility model provides a welding strip turnover type photovoltaic module which comprises battery pieces, wherein adjacent battery pieces are connected through welding strips along the main grid direction of the battery pieces and form a battery piece string, the welding strips led out from one end of the battery piece string are positive poles and are connected through positive bus bars, the welding strips led out from the other end of the battery piece string are negative poles and are connected through negative bus bars, and the welding strips at the two ends of the battery piece string are bent by 180 degrees, so that the positive bus bars and the negative bus bars are positioned on the back surfaces of the battery pieces; The part of the welding strip bent to the back of the battery piece is separated from the back of the battery piece by an insulating filler strip, or the part of the welding strip bent to the back of the battery piece is separated by the insulating filler strip. The battery plate is characterized in that a welding strip connected with a positive bus bar is arranged on the front face of the battery plate, a positive U-shaped groove is formed when the welding strip is bent, the side part of the battery plate is clamped in the positive U-shaped groove, a gasket strip is also arranged in the U-shaped groove and is oppositely clamped between the welding strip and the back face of the battery plate, the welding strip connected with a negative bus bar is bent in the direction away from the battery plate to form a negative U-shaped groove, the gasket strip is clamped in the negative U-shaped groove, and two sides of the gasket strip are connected with the groove wall of the negative U-shaped groove. Further, a through hole is formed in the length direction of the filler strip, and the end part of the welding strip penetrates out of the through hole. Further, the bending part of the welding strip is attached to the filler strip. Further, the perforation is biased to one side of the backing strip to divide the backing strip into a large part and a small part, and the welding strip is clamped with the wider part of the backing strip. The battery piece string is divided into an upper battery piece string and a lower battery piece string by the middle partition of the battery piece string, an upper welding strip is led out from the upper battery piece string to the lower battery piece string, a lower welding strip is led out from the lower battery piece string to the upper battery piece string, the polarities of the upper welding strip and the lower welding strip are identical and are staggered relatively, the polaritie