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CN-122002956-A - Processing method of battery piece, battery piece and photovoltaic module

CN122002956ACN 122002956 ACN122002956 ACN 122002956ACN-122002956-A

Abstract

Embodiments of the present application relate to the field of photovoltaics. The embodiment of the application provides a processing method of a battery piece, the battery piece and a photovoltaic module. The processing method of the battery piece comprises the steps of texturing the first surface and/or the second surface of the substrate, setting doping sizing agent on the surface of the first area, solidifying the doping sizing agent, and forming a doping area in the first area. The substrate is passivated. Electrodes are prepared at corresponding locations of the doped regions. The processing method provided by the embodiment of the application has the advantages of fewer wet etching steps, simple process and lower cost, and meanwhile, the Auger recombination of the processed battery piece is lower, the open-circuit voltage is higher, the conversion efficiency is higher, and the overall performance of the battery piece is better.

Inventors

  • WANG ZHAO
  • ZHANG YUANFANG
  • SHEN MENGCHAO
  • XIA LUYAO
  • ZHANG XINYU
  • YANG JIE
  • ZHENG PEITING

Assignees

  • 浙江晶科能源有限公司

Dates

Publication Date
20260508
Application Date
20260408

Claims (15)

  1. 1. A method for processing a battery piece, characterized in that a first surface (11) and/or a second surface (12) of a substrate (1) of the battery piece include a first region (13) and a second region (14), and a second region (14) is disposed between adjacent first regions (13), the method for processing a battery piece includes: -texturing the first surface (11) with the first area (13) and/or the second surface (12) with the first area (13); Setting and curing a doping paste (2) on the surface of the first region (13), and forming a doping region (3) on the first region (13), wherein the surface of the first region (13) with the doping region (3) and the surface of the second region (14) without the doping region (3) are at the same height; -passivating the substrate (1); An electrode (6) is prepared at a corresponding location of the doped region (3).
  2. 2. The method of processing a battery sheet according to claim 1, wherein the steps of disposing a doping paste (2) in the first region (13) and curing, and forming a doping region (3) in the first region (13) include: And setting and solidifying the doping sizing agent (2) on the surface of the first region (13), and directly doping the first region (13) to form the doped region (3).
  3. 3. The method of processing a battery sheet according to claim 2, wherein the step of disposing the doping paste (2) on the surface of the first region (13) and solidifying, and directly doping the first region (13) to form the doped region (3) includes: The doping sizing agent (2) is arranged on the surface of the first area (13) of the first surface (11) and solidified, and the first area (13) of the first surface (11) is directly doped to form a first doping area (31); -washing the substrate (1); The doping paste (2) is arranged on the surface of the first area (13) of the second surface (12) and solidified, and the first area (13) of the second surface (12) is directly doped to form a second doping area (32).
  4. 4. The method of processing a battery sheet according to claim 2, wherein the step of disposing the doping paste (2) on the surface of the first region (13) and solidifying, and directly doping the first region (13) to form the doped region (3) includes: The first region (13) is directly doped by at least one of high temperature heat treatment, high energy particle irradiation, laser annealing activation.
  5. 5. The method according to claim 4, wherein the conditions of the high-temperature heat treatment are a treatment temperature of 750 ℃ to 1100 ℃, an inert gas atmosphere, a treatment pressure of 10mbar to atmospheric pressure, a treatment time of 5 minutes to 60 minutes, and a treatment temperature of 750 ℃ to 1100 ℃, an oxygen atmosphere, a treatment pressure of 10mbar to atmospheric pressure, a treatment time of 10 minutes to 180 minutes; The conditions of high-energy particle irradiation are that inert gas ionization is adopted to accelerate the particle bombardment material to carry out the high-energy particle irradiation process, the particle energy is 10KeV to 1MeV, the incident angle is 90 degrees, and the vacuum degree is 10 -4 Pa to 10 -7 Pa; The laser annealing activation condition is that infrared laser is adopted, the laser wavelength is 1024nm, the laser power is 100W to 2000W, the light spot size is 30um to 900um, the light spot stacking scanning is carried out, and the scanning speed is 0.2m/s to 8m/s.
  6. 6. The method of processing a battery sheet according to claim 1, wherein the steps of disposing a doping paste (2) on the surface of the first region (13) and curing, and forming a doping region (3) in the first region (13) include: The doping sizing agent (2) is arranged on the surface of the first area (13), the doping sizing agent (2) is diffused to the first area (13) to form a diffusion area (4), and the diffusion area (4) is activated to form the doping area (3).
  7. 7. The method of processing a battery sheet according to claim 6, wherein the step of disposing the doping paste (2) on the surface of the first region (13) to diffuse the doping paste (2) into the first region (13) to form a diffusion region (4), and activating the diffusion region (4) to form the doping region (3) includes: providing the doping paste (2) on the surface of the first region (13) of the first surface (11) and solidifying the doping paste to diffuse the doping paste (2) to the first region (13) of the first surface (11) to form a first diffusion region (41), and activating the first diffusion region (41) to form a first doping region (31); -washing the substrate (1); The doping paste (2) is arranged on the surface of the first area (13) of the second surface (12) and solidified, so that the doping paste (2) is diffused to the first area (13) of the second surface (12) to form a second diffusion area (42), and the second diffusion area (42) is activated to form a second doping area (32).
  8. 8. The method according to claim 6, wherein the step of disposing the doping paste (2) on the surface of the first region (13) and diffusing the doping paste (2) into the first region (13) to form a diffusion region (4), and activating the diffusion region (4) comprises: The diffusion region (4) is formed by diffusing the doping paste (2) into the first region (13) by at least one of high temperature heat treatment, high energy particle irradiation, and laser annealing activation.
  9. 9. The method for manufacturing a battery sheet according to claim 8, wherein the conditions of the high-temperature heat treatment are a treatment temperature of 750 ℃ to 1100 ℃, a treatment time of 5 minutes to 30 minutes, an inert gas atmosphere, and a treatment pressure of 10mbar to atmospheric pressure; The conditions of high-energy particle irradiation are that inert gas ionization is adopted to accelerate the particle bombardment material to carry out the high-energy particle irradiation process, the particle energy is 10KeV to 700KeV, the incidence angle is 90 degrees, and the vacuum degree is 10 -4 Pa to 10 -7 Pa; the laser annealing activation condition is that infrared laser with wavelength of 1024nm, laser power of 100W-1000W, spot size of 30 um-900 um, spot stacking scanning with scanning speed of 0.2 m/s-8 m/s is adopted.
  10. 10. The method according to claim 6, wherein the step of disposing the doping paste (2) on the surface of the first region (13) and diffusing the doping paste (2) into the first region (13) to form a diffusion region (4), and activating the diffusion region (4) comprises: -activating the diffusion zone (4) by means of a high temperature heat treatment; The conditions of the high-temperature heat treatment are that the treatment temperature is 750-1100 ℃, the treatment time is 10-180 minutes, the oxygen atmosphere is 10mbar to atmospheric pressure.
  11. 11. The method of processing a battery sheet according to any one of claims 1 to 10, wherein the steps of providing a doping paste (2) on the surface of the first region (13) and curing, and forming a doping region (3) in the first region (13) include: the doping type of the first region (13) of the first surface (11) is different from the doping type of the first region (13) of the second surface (12).
  12. 12. The method of processing a battery sheet according to any one of claims 1 to 10, wherein the step of passivating the substrate (1) comprises: cleaning the substrate (1) to remove slurry residues and oxide layers on the surface of the substrate (1); A passivation layer (5) is formed on the surface of the substrate (1).
  13. 13. The method of processing a battery sheet according to any one of claims 1 to 10, wherein the step of preparing an electrode (6) at a corresponding position of the doped region (3) comprises: the electrode (6) is prepared in the doped region (3) by at least one of screen printing, spraying, roll coating, laser transfer printing, coating.
  14. 14. A battery piece processed by adopting the processing method of the battery piece according to any one of claims 1 to 13, wherein the battery piece comprises a substrate (1), a passivation layer (5) and an electrode (6), two opposite sides of the substrate (1) are respectively provided with a first surface (11) and a second surface (12), the first surface (11) and/or the second surface (12) are provided with a suede, the first surface (11) and/or the second surface (12) are provided with a first area (13) and a second area (14), the second area (14) is arranged between the adjacent first areas (13), the first area (13) is provided with a doped area (3), the doped area (3) is positioned in the substrate (1), the first surface (11) and the second surface (12) are provided with the passivation layer (5), and the electrode (6) is arranged in the first area (13); The surface of the first region (13) with the doped region (3) and the surface of the second region (14) without the doped region (3) are at the same height.
  15. 15. A photovoltaic module characterized in that it comprises a battery sheet produced by the method for processing a battery sheet according to any one of claims 1 to 13 or a battery sheet according to claim 14.

Description

Processing method of battery piece, battery piece and photovoltaic module Technical Field The embodiment of the application relates to the field of photovoltaics, in particular to a processing method of a battery piece, the battery piece and a photovoltaic module. Background With the development of technology, photovoltaic modules are increasingly used, and the photovoltaic modules include a battery sheet, which can absorb light energy and convert the light energy into electric energy. Therefore, the processing flow and performance of the battery sheet are important factors affecting the cost and performance of the photovoltaic module. Disclosure of Invention The embodiment of the application provides a processing method of a battery piece, the battery piece and a photovoltaic module, which are used for simplifying the processing technology of the battery piece and improving the performance of the battery piece. The embodiment of the application provides a processing method of a battery piece, wherein a first surface and/or a second surface of a substrate of the battery piece comprise a first area and a second area, and a second area is arranged between adjacent first areas, and the processing method of the battery piece comprises the following steps: Texturing the first surface with the first region and/or the second surface with the first region; Setting and solidifying doping sizing agent on the surface of the first area, and forming a doping area in the first area; passivating the substrate; and preparing electrodes at corresponding positions of the doped regions. In one possible embodiment, the step of disposing a doping paste in the first region and curing, and forming a doped region in the first region includes: and setting and solidifying the doping sizing agent on the surface of the first region, and directly doping the first region to form the doped region. In one possible embodiment, the doping paste is provided on the surface of the first region and cured, the step of directly doping the first region to form the doped region includes: Setting and solidifying the doping sizing agent on the surface of the first area of the first surface, and directly doping the first area of the first surface to form a first doping area; cleaning the substrate; And setting and curing the doping sizing agent on the surface of the first area of the second surface, and directly doping the first area of the second surface to form a second doping area. In one possible embodiment, the doping paste is provided on the surface of the first region and cured, the step of directly doping the first region to form the doped region includes: the first region is directly doped by at least one of high temperature heat treatment, high energy particle irradiation, and laser annealing activation. In one possible embodiment, the conditions of the high temperature heat treatment are that the treatment is carried out at a treatment temperature of 750 ℃ to 1100 ℃, an inert gas atmosphere and a treatment pressure of 10mbar to atmospheric pressure for 5 minutes to 60 minutes, and then at a treatment temperature of 750 ℃ to 1100 ℃, an oxygen atmosphere and a treatment pressure of 10mbar to atmospheric pressure for 10 minutes to 180 minutes; The conditions of high-energy particle irradiation are that inert gas ionization is adopted to accelerate the particle bombardment material to carry out the high-energy particle irradiation process, the particle energy is 10KeV to 1MeV, the incident angle is 90 degrees, and the vacuum degree is 10 -4 Pa to 10 -7 Pa; The laser annealing activation condition is that infrared laser is adopted, the laser wavelength is 1024nm, the laser power is 100W to 2000W, the light spot size is 30um to 900um, the light spot stacking scanning is carried out, and the scanning speed is 0.2m/s to 8m/s. In one possible embodiment, the step of disposing a doping paste on the surface of the first region and curing, and forming a doped region in the first region includes: and the surface of the first region is provided with the doping sizing agent, so that the doping sizing agent is diffused to the first region to form a diffusion region, and the diffusion region is activated to form the doping region. In one possible embodiment, the step of disposing the doping paste on the surface of the first region, diffusing the doping paste into the first region to form a diffusion region, and activating the diffusion region to form the doped region includes: Setting and solidifying the doping sizing agent on the surface of the first area of the first surface to enable the doping sizing agent to diffuse to the first area of the first surface to form a first diffusion area, and activating the first diffusion area to form a first doping area; cleaning the substrate; And setting and curing the doping slurry on the surface of the first area of the second surface, so that the doping slurry is diffused to the first area of the second surface to