JPH0783132B2 - Foil material for solar cell interconnector - Google Patents
Foil material for solar cell interconnectorInfo
- Publication number
- JPH0783132B2 JPH0783132B2 JP62101441A JP10144187A JPH0783132B2 JP H0783132 B2 JPH0783132 B2 JP H0783132B2 JP 62101441 A JP62101441 A JP 62101441A JP 10144187 A JP10144187 A JP 10144187A JP H0783132 B2 JPH0783132 B2 JP H0783132B2
- Authority
- JP
- Japan
- Prior art keywords
- foil material
- solar cell
- time
- interconnector
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011888 foil Substances 0.000 title claims description 22
- 239000000463 material Substances 0.000 title claims description 20
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- 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
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
-
- 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
- Y02E10/544—Solar cells from Group III-V materials
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、宇宙衛星などに塔載されるSiあるいはGa−
As太陽電池のインターコネクタとして用いるのに適した
経時的特性変化、特に経時的軟化のない箔材に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] This invention relates to Si or Ga-mounted on a space satellite or the like.
The present invention relates to a foil material which is suitable for use as an interconnector of an As solar cell and has no characteristic change with time, particularly softening with time.
近年、宇宙衛星にSi太陽電池やGa−As太陽電池が数多く
塔載されるようになつている。In recent years, a large number of Si solar cells and Ga-As solar cells have been mounted on space satellites.
これらの太陽電池の構造部材であるインターコネクタ
は、素材としての通常厚さが20〜30μｍの薄い箔材から
エツチングあるいは打抜き加工によりコネクタ形状に成
形され、かつ各々のセルにスポツト溶接により取付けら
れるものであり、一方太陽電池が宇宙衛星に塔載された
場合、打上げまで相当長時間の間作動テストにかけら
れ、かつ打上げ時の振動や宇宙空間での激しい熱サイク
ルにさらされるものであり、したがつて現在これらの使
用環境に耐える箔材として剛性のある純Agの箔材が用い
られている。The interconnector, which is a structural member of these solar cells, is formed into a connector shape by etching or punching from a thin foil material with a normal thickness of 20 to 30 μm, and is attached to each cell by spot welding. On the other hand, when the solar cell is mounted on a space satellite, it will be subjected to an operation test for a considerably long time before launch, and will be exposed to vibrations at launch and severe thermal cycles in space. At present, a rigid pure Ag foil material is used as a foil material that can withstand these usage environments.
しかし、上記のインターコネクタ用純Ag製箔材の場合、
箔材に加工された直後においては、加工硬化により剛性
（硬さ）を保持しているが、数日から数週間の経過で軟
化し、この結果、例えばエツチングや打抜き成形時に、
その厚さが上記のように20〜30μｍと薄いことと合まつ
て、シワが発生したり、あるいはセルとの接合の際のス
ポツト溶接時の作業性が低下したりするなどの問題点が
ある。また、この経時的軟化現象は、加工組織の再結晶
化に原因し、したがつて時間の経過と共に常温再結晶の
促進をもたらし、次第に結晶粒が粗大化するようになる
ことから、疲労強度の低下をきたし、このような疲労強
度の低下は、特に宇宙衛星に塔載された太陽電池の場
合、上記の使用環境にさらされることから、望ましくな
いものである。However, in the case of the above pure Ag foil material for interconnectors,
Immediately after being processed into a foil material, it retains its rigidity (hardness) due to work hardening, but it softens after several days to several weeks, and as a result, for example, during etching or punch forming,
In combination with the thickness being as thin as 20 to 30 μm as described above, there are problems such as wrinkles or deterioration of workability during spot welding when joining cells. . Further, this softening phenomenon with time is caused by recrystallization of the processed structure, and thus promotes the normal temperature recrystallization with the passage of time, and gradually the crystal grains become coarse. Such a decrease in fatigue strength is undesired, especially in the case of a solar cell mounted on a space satellite, because it is exposed to the above-mentioned use environment.
そこで、本発明者等は、上述のような観点から、時間経
過によつても特性、特に剛性低下のない太陽電池のイン
ターコネクタ用箔材を開発すべく研究を行なつた結果、
純Agに、Caを10〜1000ppm含有させたAg合金で構成した
箔材においては、加工硬化により付与された剛性（硬
さ）が経時的に変化せず、すなわち加工直後の剛性を時
間経過に関係なく保持し、かつCaの含有によつて導電性
があまり損なわれず、したがつてこれを太陽電池のイン
ターコネクタとして用いた場合にすぐれた性能を長期に
亘つて発揮するという知見を得たのである。Therefore, the present inventors, from the above viewpoints, as a result of conducting research to develop a foil material for an interconnector of a solar cell, which does not exhibit deterioration in rigidity, especially in characteristics over time.
In the foil material composed of Ag alloy in which Ca is contained in pure Ag in the range of 10 to 1000 ppm, the rigidity (hardness) imparted by work hardening does not change with time, that is, the rigidity immediately after working is changed with time. It was held regardless of, and due to the inclusion of Ca, the conductivity was not significantly impaired, and therefore it was found that when it is used as an interconnector of a solar cell, excellent performance is exhibited over a long period of time. is there.
この発明は、上記知見にもとづいてなされたものであつ
て、 Ca:10〜1000ppm、 を含有し、残りがAgと不可避不純物からなる組成を有す
るAg合金で構成した、特に経時的軟化のない太陽電池の
インターコネクタ用箔材に特徴を有するものである。The present invention has been made based on the above findings, in which a solar alloy which contains Ca: 10 to 1000 ppm, the balance being an Ag alloy having a composition of Ag and inevitable impurities, has no particular softening with time. It is characterized by a foil material for a battery interconnector.
なお、この発明のAg合金製箔材において、Ca含有量を10
〜1000ppmと限定したのは、その含有量が10ppm未満で
は、経時的軟化を防止することができず、一方その含有
量が1000ppmを越えると、導電性の低下が著しくなり、
所望の導電性を確保するのが困難となるばかりでなく、
硬くなりすぎて扱いにくくなるという理由によるもので
ある。Incidentally, in the Ag alloy foil material of the present invention, the Ca content is 10
Limited to ~ 1000 ppm, if the content is less than 10 ppm, it is not possible to prevent softening over time, while if the content exceeds 1000 ppm, the conductivity is significantly reduced,
Not only is it difficult to ensure the desired conductivity,
This is because it becomes too hard and difficult to handle.
つぎに、この発明のAg合金製箔材を実施例により具体的
に説明する。Next, the Ag alloy foil material of the present invention will be specifically described with reference to Examples.
通常の真空溶解炉を用いて、それぞれ第１表に示される
成分組成をもつたAg合金溶湯を調製し、厚さ:10mm×幅:
120mm×長さ:200mmの寸法をもつたインゴツトに鋳造
し、このインゴツトの両面を面削して厚さ:8mmとし、こ
れのマイクロビツカース硬さを荷重:300gの条件で測定
すると共に、過流型電導度計を用いて電導度を測定し、
ついでこのインゴツトに通常の条件で冷間圧延を施して
厚さ:0.030mmの本発明箔材１〜７および比較箔材１〜３
をそれぞれ製造した。Using a normal vacuum melting furnace, Ag alloy melts having the composition shown in Table 1 were prepared. Thickness: 10 mm x width:
120mm x length: cast into an ingot having a dimension of 200mm, both sides of this ingot are chamfered to a thickness of 8mm, and the Micro Vickers hardness of this is measured under the condition of a load of 300g and Conductivity is measured using a flow-type conductivity meter,
Then, this ingot is subjected to cold rolling under normal conditions to obtain foils 1 to 7 of the present invention having a thickness of 0.030 mm and comparative foils 1 to 3.
Were manufactured respectively.
つぎに、この結果得られた各種の箔材について、製造直
後および６ケ月経過後のマイクロビツカース硬さを荷
重:25gの条件で測定した。これらの測定結果を第１表に
示した。Next, with respect to the various foil materials obtained as a result, the micro Vickers hardness was measured immediately after production and after 6 months, under the condition of a load of 25 g. The results of these measurements are shown in Table 1.
なお、比較箔材１〜３は、いずれもCa含有量がこの発明
の範囲から外れたAg合金で構成されたものである。The comparative foil materials 1 to 3 are all made of an Ag alloy having a Ca content outside the range of the present invention.
第１表に示される結果から、本発明箔材１〜７ は、いずれも製造直後と６ケ月経過後の硬さにほとんど
変化がなく、経時的軟化はほとんどなく、かつ90％以上
の高い導電度を保持しているのに対して、Caの含有がな
い純Agで構成された比較箔材１では経時的軟化が著し
く、この傾向はCa含有量がこの発明の範囲から低い方に
外れたAg合金で構成された比較箔材２でも見られ、一方
Caの含有量がこの発明の範囲から高い方に外れたAg合金
で構成された比較箔材３では経時的軟化はないものの、
電導度の点で不十分であることが明らかである。From the results shown in Table 1, the foil materials 1 to 7 of the present invention In both cases, there is almost no change in hardness immediately after production and after 6 months, there is almost no softening over time, and a high conductivity of 90% or more is maintained, whereas no Ca is contained. The comparative foil material 1 composed of pure Ag showed remarkable softening with time, and this tendency was also observed in the comparative foil material 2 composed of an Ag alloy having a Ca content lower than the range of the present invention.
Although there is no softening with time in the comparative foil material 3 composed of an Ag alloy having a Ca content outside the range of the present invention,
It is clear that the electric conductivity is insufficient.
上述のように、この発明のAg合金製箔材は、製造工程に
おける加工硬化により付与された剛性（硬さ）の低下が
時間経過によつてもほとんどなく、このことは疲労強度
の低下もないことを示し、さらに高い導電度を保持して
いるので、特にこれらの特性が要求される太陽電池のイ
ンターコネクタとして用いた場合に、すぐれた性能を著
しく長期に亘つて安定的に発揮するものである。As described above, in the Ag alloy foil material of the present invention, there is almost no decrease in rigidity (hardness) imparted by work hardening in the manufacturing process even with the passage of time, and there is no decrease in fatigue strength. Since it retains high conductivity, it exhibits excellent performance in a stable manner over a long period of time, especially when used as an interconnector for solar cells that require these characteristics. is there.
Claims (1)
るAg合金で構成したことを特徴とする経時的特性変化の
ない太陽電池のインターコネクタ用箔材。1. A foil material for an interconnector of a solar cell, which does not change in characteristics over time, characterized in that it is composed of an Ag alloy containing Ca: 10 to 1000 ppm and the balance being Ag and inevitable impurities. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62101441A JPH0783132B2 (en) | 1987-04-24 | 1987-04-24 | Foil material for solar cell interconnector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62101441A JPH0783132B2 (en) | 1987-04-24 | 1987-04-24 | Foil material for solar cell interconnector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63266887A JPS63266887A (en) | 1988-11-02 |
| JPH0783132B2 true JPH0783132B2 (en) | 1995-09-06 |
Family
ID=14300778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62101441A Expired - Lifetime JPH0783132B2 (en) | 1987-04-24 | 1987-04-24 | Foil material for solar cell interconnector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0783132B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69009814T2 (en) * | 1989-03-24 | 1994-11-17 | Mitsubishi Materials Corp | Silver alloy sheet for connecting solar cells. |
| JP3543297B2 (en) * | 1999-08-20 | 2004-07-14 | 田中貴金属工業株式会社 | Solar cell made of interconnector material for solar cell and method of manufacturing the same |
| JP5089569B2 (en) * | 2001-06-29 | 2012-12-05 | シャープ株式会社 | Solar cell module and manufacturing method thereof |
-
1987
- 1987-04-24 JP JP62101441A patent/JPH0783132B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63266887A (en) | 1988-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7195054B2 (en) | Copper alloy sheet material and manufacturing method thereof | |
| EP0388973B1 (en) | Silver alloy foil for interconnector of solar cell | |
| JPH0783132B2 (en) | Foil material for solar cell interconnector | |
| JPH08170143A (en) | Alloy based on silicide essentially consisting of chromium and molybdenum | |
| JP3113895B2 (en) | Lead alloy for storage battery | |
| JP2727729B2 (en) | Ag alloy foil material for interconnector of solar cell | |
| JPS59208035A (en) | Lead alloy for storage battery | |
| KR940003504B1 (en) | Electrical contact spring material made of copper-base alloy of high strength and toughness with reduced anisotropy in characteristics | |
| JP2727730B2 (en) | Ag alloy foil material for interconnector of solar cell | |
| JP2006089815A (en) | Material for interconnector of solar battery | |
| EP3066709B1 (en) | Corrosion resistant positive grid for lead-acid batteries | |
| JP2936899B2 (en) | Titanium alloy with excellent corrosion resistance and workability to non-oxidizing acids | |
| JP2552920B2 (en) | Copper alloy for backing plate | |
| JP3161269B2 (en) | Stainless steel with excellent resistance to molten carbonate corrosion | |
| JPS5832220B2 (en) | Softening resistant copper alloy | |
| JP2004273439A (en) | Ni BASED ALLOY MATERIAL HAVING EXTREMELY SMALL ION ELUTION AMOUNT IN SOLID POLYMER TYPE FUEL CELL ENVIRONMENT | |
| JPS63277736A (en) | Separator for phosphoric acid type fuel cell | |
| JP2002069559A (en) | Aluminum alloy extruded material having excellent intergranular corrosion resistance | |
| JPS63293135A (en) | Separator for phosphoric acid type fuel cell | |
| JP2007172861A (en) | Cathode vessel for sodium-sulfur battery | |
| JPS63277735A (en) | Separator for phosphoric acid type fuel cell | |
| JP2002180167A (en) | Titanium band plate and its production method | |
| JPH025569B2 (en) | ||
| JPS63277737A (en) | Separator for phosphoric acid type fuel cell | |
| WO2020213224A1 (en) | Copper alloy sheet material and method for manufacturing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070906 Year of fee payment: 12 |