JP5161734B2 - 太陽電池用リード線及びその製造方法並びに太陽電池 - Google Patents
太陽電池用リード線及びその製造方法並びに太陽電池 Download PDFInfo
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 title claims description 97
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000004020 conductor Substances 0.000 claims description 167
- 229910000679 solder Inorganic materials 0.000 claims description 133
- 238000007747 plating Methods 0.000 claims description 74
- 239000004065 semiconductor Substances 0.000 claims description 70
- 239000000758 substrate Substances 0.000 claims description 70
- 238000010438 heat treatment Methods 0.000 claims description 30
- 229910052802 copper Inorganic materials 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 11
- 229910052709 silver Inorganic materials 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052737 gold Inorganic materials 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910052787 antimony Inorganic materials 0.000 claims description 5
- 229910052797 bismuth Inorganic materials 0.000 claims description 5
- 229910052738 indium Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910052745 lead Inorganic materials 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims 1
- 210000004027 cell Anatomy 0.000 description 157
- 239000010949 copper Substances 0.000 description 42
- 238000005336 cracking Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 239000002994 raw material Substances 0.000 description 9
- 238000005476 soldering Methods 0.000 description 7
- 230000035882 stress Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005304 joining Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
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- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- C23C6/00—Coating by casting molten material on the substrate
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Description
原料導電材であるCu材料を圧延加工して幅2.0mm、厚さ0.16mmの平角線状の帯板状導電材を形成した。この帯板状導電材をダイス加工して凹面2a、2bを有する凹凸導電材4を作成した。この凹凸導電材4をバッチ式加熱設備で熱処理し、さらに、この凹凸導電材4の周囲にSn−3%Ag−0.5Cuはんだめっきを施して凹凸導電材4の凹面2a、2bに溶融はんだめっき層5を平坦に形成した(導体は熱処理Cu)。以上により、図1の太陽電池用リード線1を得た。
実施例1の太陽電池用リード線1の構成に加え、側面c、dの凸面3c、3dに側部溶融はんだめっき層22c、22dを形成して図2の太陽電池用リード線21を得た。
原料導電材であるCu−インバー−Cu(比率2:1:2)材料をスリット加工して幅2.0mm、厚さ0.16mmの平角線状の帯板状導電材を形成した。この帯板状導電材をダイス加工して凹面2a、2bを有する凹凸導電材4を作成した。この凹凸導電材4の周囲にはんだめっきを施して凹凸導電材4の凹面2a、2bに溶融はんだめっき層5を平坦に形成した。以上により、図1の太陽電池用リード線1を得た。
原料導電材であるCu材料を圧延加工して幅2.0mm、厚さ0.16mmの平角線状の帯板状導電材112を形成した。この帯板状導電材112をバッチ式加熱設備で熱処理し、さらに、この帯板状導電材112の周囲にはんだめっきを施して帯板状導電材112の平坦な上下面に山形に膨らんだ溶融はんだめっき層113を形成した(導体は熱処理Cu)。以上により、図5の太陽電池用リード線111を得た。
原料導電材であるCu−インバー−Cu(比率2:1:2)材料をスリット加工して幅2.0mm、厚さ0.16mmの下凹面導電材123を形成した。この下凹面導電材123の周囲にはんだめっきを施して下凹面導電材123の凹面122に平坦な溶融はんだめっき層124を形成すると共に、平坦な側面には山形に膨らんだ溶融はんだめっき層125を形成した。以上により、図6の太陽電池用リード線121を得た。
[(割れが生じないセル枚数)
/(はんだ付け試験を行ったセル枚数)]×100
表2に示されるように、実施例1〜3の太陽電池用リード線は、ダイス加工によって上下面a、bに凹面2a、2bを有し側面に凸面3c、3dを有する凹凸導電材4を形成し、凹面2a、2bに溶融はんだを供給して溶融はんだめっき層5を平坦に形成したので、優れた接合力が得られることが確認された。
2a、2b 凹面
3c、3d 凸面
4 凹凸導電材
5 溶融はんだめっき層
Claims (8)
- 導電材の表面に溶融はんだめっき層を形成した太陽電池用リード線において、帯板状導電材をダイス加工することによって、上下面には長手方向に伸びる凹面を有すると共に側面には丸みを帯びて突き出た凸面を有し、上記凹面と凸面が円滑な面で結ばれた形の断面形状を有する凹凸導電材を形成し、該凹凸導電材の上記上下面の凹面に溶融はんだを供給して上記溶融はんだめっき層を平坦に形成したことを特徴とする太陽電池用リード線。
- 導電材の表面に溶融はんだめっき層を形成した太陽電池用リード線において、帯板状導電材をダイス加工することによって、上下面には長手方向に伸びる凹面を有すると共に側面には丸みを帯びて突き出た凸面の頂部に凹面を有し、上記上下面と上記凸面が円滑な面で結ばれた形の断面形状を有する凹凸導電材を形成し、該凹凸導電材の表面に溶融はんだを供給し、上記上下面の凹面に溶融はんだめっき層を平坦に形成すると共に上記凸面の凹面に側部溶融はんだめっき層を形成したことを特徴とする太陽電池用リード線。
- 上記帯板状導電材は、体積抵抗率が50μΩ・mm以下の平角線であることを特徴とする請求項1又は2記載の太陽電池用リード線。
- 上記帯板状導電材は、Cu、Al、Ag、Auのいずれかからなることを特徴とする請求項1〜3いずれか記載の太陽電池用リード線。
- 上記帯板状導電材は、タフピッチCu、低酸素Cu、無酸素Cu、リン脱酸Cu、高純度Cu(99.9999%以上)のいずれかからなることを特徴とする請求項1〜4いずれか記載の太陽電池用リード線。
- 上記溶融はんだめっき層は、Sn系はんだ、又は、第1成分としてSnを用い、第2成分としてPb、In、Bi、Sb、Ag、Zn、Ni、Cuから選択される少なくとも1つの元素を0.1wt%以上含むSn系はんだ合金からなることを特徴とする請求項1〜5いずれか記載の太陽電池用リード線。
- 原料導電材を圧延加工又はスリット加工することにより帯板状導電材を形成し、この帯板状導電材をダイス加工することによって、上下面には凹面を有すると共に側面には凸面を有する凹凸導電材を形成し、該凹凸導電材を連続通電加熱炉又は連続式加熱炉又はバッチ式加熱設備で熱処理し、その後、上記凹面に溶融はんだを供給して溶融はんだめっき層を平坦に形成する方法であって、上記ダイス加工が、上記帯板状導電材を通すダイスの穴の上辺と下辺が内に向けて凸の面で、上記ダイスの穴の側辺が外に向けて凸の丸みを帯びた曲面を有し、上記凸の曲面と凹の曲面が円滑に接続された形のダイス穴を有するダイスを通す工程であることを特徴とする太陽電池用リード線の製造方法。
- 請求項1〜6いずれか記載の太陽電池用リード線を上記溶融はんだめっき層のはんだによって半導体基板の表面電極及び裏面電極にはんだ付けしたことを特徴とする太陽電池。
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JP2008288813A JP5161734B2 (ja) | 2008-02-13 | 2008-11-11 | 太陽電池用リード線及びその製造方法並びに太陽電池 |
US12/385,417 US20090260689A1 (en) | 2008-02-13 | 2009-04-07 | Solar cell lead wire, method of making the same, and solar cell |
CN2009101584818A CN101740642B (zh) | 2008-11-11 | 2009-07-08 | 太阳电池用引线及其制造方法以及太阳电池 |
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US9537032B2 (en) * | 2009-06-02 | 2017-01-03 | Solarcity Corporation | Low-cost high-efficiency solar module using epitaxial Si thin-film absorber and double-sided heterojunction solar cell with integrated module fabrication |
JP5397809B2 (ja) * | 2009-10-21 | 2014-01-22 | 日立金属株式会社 | 太陽電池 |
TWI483403B (zh) | 2010-04-02 | 2015-05-01 | Gintech Energy Corp | 形成光伏面板導電通道的方法 |
JP2012182271A (ja) * | 2011-03-01 | 2012-09-20 | Hitachi Cable Ltd | 太陽電池用リード線およびその製造方法並びにそれを用いた太陽電池 |
JP2013258305A (ja) * | 2012-06-13 | 2013-12-26 | Toyo Kohan Co Ltd | 太陽電池用インターコネクタ、およびインターコネクタ付き太陽電池セル |
KR20170017776A (ko) * | 2015-08-05 | 2017-02-15 | 엘지전자 주식회사 | 태양 전지 패널용 리본 및 이의 제조 방법, 그리고 태양 전지 패널 |
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US11190128B2 (en) | 2018-02-27 | 2021-11-30 | Tesla, Inc. | Parallel-connected solar roof tile modules |
CN110890441A (zh) * | 2019-11-15 | 2020-03-17 | 苏州宇邦新型材料股份有限公司 | 一种光伏焊带 |
CN111276558A (zh) * | 2020-02-07 | 2020-06-12 | 泰州隆基乐叶光伏科技有限公司 | 焊带及焊带生产方法 |
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