Title:
WELDING STRIP, PHOTOVOLTAIC ASSEMBLY HAVING SAME, AND METHOD FOR PROCESSING WELDING STRIP
Document Type and Number:
WIPO Patent Application WO/2022/033323
Kind Code:
A1
Abstract:
A welding strip (100), comprising: a conductive substrate (1); a tin welding layer (2). The tin welding layer (2) covers at least a portion of the conductive substrate (1). The tin welding layer (2) consists of Sn, Bi and Pb; or the tin welding layer (2) consists of Sn, Bi, Pb, and at least one of Ga, Ge, In, Sb and lanthanide elements. The content of Bi is 8% to 20%, the content of Sn is 40% to 65%, the content of Pb is 25% to 40%, and the sum of the content of Ga, Ge, In, Sb and at least one of the lanthanide elements is less than or equal to 5%. The welding strip (100) has a relatively low melting point, and brittleness thereof at a low temperature can be reduced, thereby preventing oxidation, so that the yield of a photovoltaic assembly can be improved, and costs can be reduced. Also disclosed is a photovoltaic assembly having the described welding strip (100), and also disclosed is a method for processing the described welding strip (100).
Inventors:
DENG SHIFENG (CN)
XIA ZHENGYUE (CN)
XU ALAN (CN)
XIA ZHENGYUE (CN)
XU ALAN (CN)
Application Number:
PCT/CN2021/109339
Publication Date:
February 17, 2022
Filing Date:
July 29, 2021
Export Citation:
Assignee:
CSI CELLS CO LTD (CN)
CSI SOLAR CO LTD (CN)
CANADIAN SOLAR MFG CHANGSHU INC (CN)
CSI SOLAR CO LTD (CN)
CANADIAN SOLAR MFG CHANGSHU INC (CN)
International Classes:
B23K35/40; B23K35/26; C22C13/02; C23C2/08; H01L31/05; H01L31/18
Foreign References:
| CN104801877A | 2015-07-29 | |||
| CN104889592A | 2015-09-09 | |||
| CN110783429A | 2020-02-11 | |||
| CN104070299A | 2014-10-01 | |||
| CN105382443A | 2016-03-09 | |||
| CN108161272A | 2018-06-15 | |||
| CN110676345A | 2020-01-10 | |||
| CN209401644U | 2019-09-17 | |||
| CN108544120A | 2018-09-18 | |||
| EP0639426A1 | 1995-02-22 |
Other References:
YANG, ZHENYING ET AL.: "Research on Sn-Bi System Low Melting Point Solder Alloys", SOLAR ENERGY, no. 4, 28 April 2016 (2016-04-28), CN, pages 42 - 44, XP009534240, ISSN: 1003-0417
HE, FENGQIN ET AL.: "Effect of Doped Elements on Property of Tin based Low-Temperature Alloys", CHINESE JOURNAL OF POWER SOURCES, vol. 43, no. 4, 20 April 2019 (2019-04-20), XP055900083, ISSN: 1002-087X
HE, FENGQIN ET AL.: "Effect of Doped Elements on Property of Tin based Low-Temperature Alloys", CHINESE JOURNAL OF POWER SOURCES, vol. 43, no. 4, 20 April 2019 (2019-04-20), XP055900083, ISSN: 1002-087X
Attorney, Agent or Firm:
JW&PARTNERS (CN)
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