JPS63266887A - Foil material for interconnector of solar cell - Google Patents
Foil material for interconnector of solar cellInfo
- Publication number
- JPS63266887A JPS63266887A JP62101441A JP10144187A JPS63266887A JP S63266887 A JPS63266887 A JP S63266887A JP 62101441 A JP62101441 A JP 62101441A JP 10144187 A JP10144187 A JP 10144187A JP S63266887 A JPS63266887 A JP S63266887A
- Authority
- JP
- Japan
- Prior art keywords
- foil material
- alloy
- interconnector
- solar cell
- ingot
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 28
- 239000011888 foil Substances 0.000 title claims abstract description 27
- 229910001316 Ag alloy Inorganic materials 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000005482 strain hardening Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 2
- 238000004080 punching Methods 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
- 230000000694 effects Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method 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)
Abstract
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Ｇ
ａ−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] [Field of Industrial Application] This invention is applicable to SI or G
The present invention relates to a foil material suitable for use as an interconnector for a-As solar cells, which does not change its characteristics over time, and in particular does not soften over 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っている。In recent years, many Si solar cells and Ga-As solar cells have been installed 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２０〜３０ ｆｉ ｍ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ット溶接により
取付（すられるものであり、一方太陽電池が宇宙衛星に
塔載された場合、打」−げまで相当長時間の開作動テス
ト（二かけられ、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、したがって現
在これらの使用環境に耐える箔材として剛性のある純Ａ
ｇの箔材が用いられている。Interconnectors, which are structural members of these solar cells, are formed into a connector shape by etching or punching from a thin foil material with a thickness of usually 20 to 30 fim, and are attached to each cell by spot welding. (On the other hand, when a solar cell is mounted on a space satellite, it undergoes quite a long open operation test (two times) before launch, and is exposed to vibrations during launch and intense thermal cycles in space. Therefore, rigid pure A is currently used as a foil material that can withstand these usage environments.
A foil material of g is used.
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１ヒし、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
と含まって、シワが発生したり、あるいはセルとの接合
の際のスポッ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、したがっ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-mentioned pure Ag foil material for interconnectors, immediately after being processed into a foil material, it maintains its rigidity (hardness) due to work hardening, but after a few days to a few weeks it becomes soft and hard. As a result, for example, wrinkles may occur during etching or punching, as the thickness is as thin as 20 to 30 μm as mentioned above, or during spot welding when joining cells. There are problems such as reduced workability. In addition, this softening phenomenon over time is caused by recrystallization of the processed structure, and therefore, as time passes, room temperature recrystallization is promoted, and the grains gradually become coarser, which leads to a decrease in fatigue strength. However, such a decrease in fatigue strength is undesirable, especially in the case of solar cells mounted on space satellites, since they are exposed to the above-mentioned usage environment.
そこで、本発明者等は、上述のような観点から、時間経
過によっても特性、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ツタ結果、
純Ａｇに、Ｃａを１０〜１１０００ｐｐ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
によって導電性があまり損なわれず、したがってこれを
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
た性能を長期に亘って発揮するという知見を碍たのであ
る。Therefore, from the above-mentioned viewpoint, the present inventors conducted research to develop a foil material for solar cell interconnectors that does not deteriorate in properties, especially rigidity, over time.
Ag made by adding 10 to 11000pp of Ca to pure Ag
In a foil material made of an alloy, the rigidity (hardness) imparted by work hardening does not change over time, that is, the rigidity immediately after processing is maintained regardless of the passage of time, and the conductivity is improved due to the inclusion of Ca. They discovered that this material does not suffer much damage, and therefore exhibits excellent performance over a long period of time when used as an interconnector for solar cells.
この発明は、」二記知見にもとづいてなされたものであ
って、
Ｃａ：１１０−１Ｏ００１）Ｉ）、
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
。This invention was made based on the findings described in Section 2 above, and is made of an Ag alloy containing Ca: 110-1O001)I), with the remainder consisting of Ag and unavoidable impurities. This is a foil material for solar cell interconnectors that does not soften.
なお、この発明のＡｇ合金製箔材において、Ｃａ含有計
な１０〜１１０００１）ｒ）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１１０００ｐＩ）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。In addition, in the Ag alloy foil material of this invention, the Ca content is limited to 10 to 110001) r) because if the content is less than 10 ppm, softening over time cannot be prevented. This is because if the amount exceeds 11,000 pI), the conductivity decreases significantly, making it difficult to secure the desired conductivity and also becoming 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 explained 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
成分組成をもったＡｇ合金溶湯を調製し、厚さ：１０聴
×幅＝１２０醍×長さ：２００聰の寸法をもったインゴ
ットに鋳造し、このインゴットの両面を面削して厚さ＝
８陥とし、これのマイクロビッカース硬さを荷重： ３
ｏｏｙの条件で測定すると共に、過流型電導度肝を用い
て電導度を測定し、ついでこのインゴットに通常の条件
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。Molten Ag alloys having the compositions shown in Table 1 were prepared using an ordinary vacuum melting furnace, and ingots with dimensions of thickness: 10 mm x width = 120 mm x length: 200 mm were prepared. Then both sides of this ingot are faceted to obtain the thickness =
8 holes, and the micro Vickers hardness of this is loaded: 3
In addition to measuring the conductivity under the conditions of ooy, the conductivity was measured using a current conductivity tester, and then this ingot was cold rolled under normal conditions to obtain foil materials 1 to 7 of the present invention having a thickness of 0.030 mm. and comparative foil materials 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ッカース硬さを荷重
：２５７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, the micro Vickers hardness of the various foil materials obtained as a result was measured immediately after production and after 6 months under a load of 257. 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。Note that Comparative Foil Materials 1 to 3 are all made of Ag alloys whose Ca content is outside the range of the present invention.
第１表に示される結果から、本発明箔材１〜７−６＝
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幅以
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, all of the foil materials 1 to 7-6 of the present invention show almost no change in hardness immediately after production and after 6 months, hardly soften over time, and have a width of 90 or more. On the other hand, Comparative foil material 1 made of pure Ag that does not contain Ca shows significant softening over time, and this tendency is more pronounced when the Ca content is lower than the range of this invention. This was also observed in Comparative foil material 2, which was made of an Ag alloy with a Ca content higher than the range of the present invention, and although there was no softening over time in Comparative foil material 3, which was made with an Ag alloy whose Ca content was higher than the range of the present invention. , it is clear that the 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
が時間経過によってもほとんどなく、このことは疲労強
度の低下もないことを示し、さらに高い電導度を保持し
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
著しく長期に亘って安定的に発揮するものである。As mentioned above, in the Ag alloy foil material of the present invention, the stiffness (hardness) imparted by work hardening during the manufacturing process hardly decreases over time, and this indicates that there is no decrease in fatigue strength. It exhibits excellent performance and maintains high conductivity over a long period of time, especially when used as an interconnector for solar cells that require these characteristics.
Claims (1)
する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。[Claims] A foil for an interconnector of a solar cell whose characteristics do not change over time, characterized by being made of an Ag alloy having a composition containing 10 to 1000 ppm of Ca, with the remainder consisting of Ag and unavoidable impurities. Material.
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 true JPS63266887A (en) | 1988-11-02 |
| JPH0783132B2 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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5023144A (en) * | 1989-03-24 | 1991-06-11 | Mitsubishi Metal Corporation | Silver alloy foil for interconnector for solar cell |
| WO2001015238A1 (en) * | 1999-08-20 | 2001-03-01 | Tanaka Kikinzoku Kogyo K.K. | Material for solar cell interconnector and method for preparation thereof |
| JP2013065882A (en) * | 2001-06-29 | 2013-04-11 | Sharp Corp | Solar cell module and method of manufacturing the same |
-
1987
- 1987-04-24 JP JP62101441A patent/JPH0783132B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5023144A (en) * | 1989-03-24 | 1991-06-11 | Mitsubishi Metal Corporation | Silver alloy foil for interconnector for solar cell |
| WO2001015238A1 (en) * | 1999-08-20 | 2001-03-01 | Tanaka Kikinzoku Kogyo K.K. | Material for solar cell interconnector and method for preparation thereof |
| JP2013065882A (en) * | 2001-06-29 | 2013-04-11 | Sharp Corp | Solar cell module and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0783132B2 (en) | 1995-09-06 |
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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 |