JP2000164200A - Method for terminal connection of sodium-sulfur battery and terminal connection structure - Google Patents
Method for terminal connection of sodium-sulfur battery and terminal connection structureInfo
- Publication number
- JP2000164200A JP2000164200A JP10334441A JP33444198A JP2000164200A JP 2000164200 A JP2000164200 A JP 2000164200A JP 10334441 A JP10334441 A JP 10334441A JP 33444198 A JP33444198 A JP 33444198A JP 2000164200 A JP2000164200 A JP 2000164200A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- cell
- positive
- connection
- connection terminal
- 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.)
- Pending
Links
Classifications
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ナトリウム−硫黄
電池の端子及びこれと同様の電池の端子とを互いに接続
する方法と、その端子接続構造とに係り、特に、電力を
貯蔵するのに好適なナトリウム−硫黄電池に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting terminals of a sodium-sulfur battery and terminals of a similar battery to each other, and a terminal connection structure thereof, and is particularly suitable for storing electric power. Related to a simple sodium-sulfur battery.
【０００２】[0002]
【従来の技術】ナトリウム−硫黄電池は、例えば変電所
等に多数設置され、発電所から電力が供給されると、そ
の電力を、電力需要の少ない夜間の時間帯に蓄えてお
き、電力需要の多い日中の時間帯に供給するようにして
用いられる。このように変電所等に用いられるナトリウ
ム−硫黄電池は、正極，負極の極端子間を電気抵抗の小
さいアルミニウムで形成された接続端子で繋いでおき、
この電池を互いに直列あるいは並列に複数個接続してい
る。2. Description of the Related Art A large number of sodium-sulfur batteries are installed, for example, in substations and the like. When power is supplied from a power plant, the power is stored during nighttime when power demand is low, and the power demand is reduced. It is used so that it is supplied during many daytime hours. In the case of a sodium-sulfur battery used in a substation or the like, a positive electrode and a negative electrode are connected by a connection terminal formed of aluminum having a small electric resistance.
A plurality of these batteries are connected to each other in series or in parallel.
【０００３】従って、この電池の正，負極端子と接続端
子との接続には接触抵抗が小さいこと、また熱サイクル
（室温〜電池作動温度の３５０℃）を受けても、周辺に
設けられているボルト等のような機械的締結手段が弛ま
ないこと等が要求されるため、強固に行う必要がある。Therefore, the connection between the positive and negative terminals of the battery and the connection terminal is provided in the vicinity even if the contact resistance is low and the battery is subjected to a heat cycle (from room temperature to a battery operating temperature of 350 ° C.). Since it is required that mechanical fastening means such as bolts do not loosen, it is necessary to perform firmly.
【０００４】例えば、従来技術として特開平６−２１５
７５７号公報に示すものと、図３に示すものとがある。[0004] For example, Japanese Patent Application Laid-Open No. 6-215
757 and FIG. 3.
【０００５】特開平６−２１５７５７号公報に示される
第一の従来技術は、両側がコ字形状をなす接続端子が形
成され、この接続端子の両端縁に折り曲げ端部に対して
反転対向するように湾曲したかしめ片が突設され、この
かしめ片と折り曲げ端部とでかしめ取付け部が構成され
る。そして、接続端子両側のかしめ片と折り曲げ端部と
の対向間隙に一方の単電池の正極端子と他方の端電池の
負極端子とを挿入し、次いで溶接縁を正極端子及び負極
端子の先端縁に一致させ、この状態で各かしめ片をかし
めることにより固定し、その後、それぞれ互いに固定さ
れた正極端子と折り曲げ端部とが、また負極端子と折り
曲げ端部とがＴＩＧ溶接されることが記載されている。[0005] In the first prior art disclosed in Japanese Patent Application Laid-Open No. 6-215557, a connection terminal having a U-shape on both sides is formed, and both ends of the connection terminal are oppositely opposed to the bent ends. A caulked piece is formed so as to protrude, and the caulked piece and the bent end portion form a caulked mounting portion. Then, the positive terminal of one cell and the negative terminal of the other cell are inserted into the opposing gap between the swaged piece and the bent end on both sides of the connection terminal, and then the welding edge is inserted into the leading edge of the positive terminal and the negative terminal. It is described that each of the caulking pieces is fixed by caulking in this state, and then the positive electrode terminal and the bent end portion, which are fixed to each other, and the negative electrode terminal and the bent end portion are TIG-welded. ing.
【０００６】また、図３に示す第二の従来技術は、ナト
リウム−硫黄電池からなる単電池１Ａ，１Ｂを直列に接
続する場合を示している。即ち、単電池１Ａ，１Ｂはそ
れぞれが正極端子３及び負極端子４を有しており、負極
端子４が絶縁物５によって取付けられている。そして、
一方の単電池１Ａの負極端子４と他方の単電池１Ｂの正
極端子３との接続に際してはアルミニウムによって形成
された接続端子２を用い、この接続端子２の一端部を単
電池１Ａの負極端子４に重ねて一致させ、それを図示し
ない固定具で固定しておく一方、接続端子２の他端部を
単電池１Ｂの正極端子３に重ねて一致させると共に、そ
の状態でアースクリップ６により挟み付けた後、前記接
続端子２の一端部と単電池１Ａの負極端子４の合わせ部
分の先端部とをＴＩＧ溶接する。The second prior art shown in FIG. 3 shows a case where unit cells 1A and 1B composed of a sodium-sulfur battery are connected in series. That is, each of the unit cells 1A and 1B has a positive terminal 3 and a negative terminal 4, and the negative terminal 4 is attached by the insulator 5. And
When connecting the negative electrode terminal 4 of one cell 1A and the positive electrode terminal 3 of the other cell 1B, a connection terminal 2 made of aluminum is used, and one end of the connection terminal 2 is connected to the negative electrode terminal 4 of the cell 1A. The other end of the connection terminal 2 is overlapped with the positive electrode terminal 3 of the cell 1B so as to be coincident with the positive electrode terminal 3 of the unit cell 1B, and is sandwiched by the ground clip 6 in this state. After that, one end of the connection terminal 2 is TIG-welded to the tip of the mating portion of the negative electrode terminal 4 of the cell 1A.
【０００７】このようにして一方の部分を溶接した後、
今度は、アースクリップ６を負極端子３側に挟み付けて
単電池１Ｂの正極端子３と接続端子２の他端部とを固定
具で固定し、その状態でＴＩＧ溶接することにより、双
方の単電池１Ａと１Ｂとを直列に接続するものである。After welding one part in this way,
This time, the ground clip 6 is sandwiched between the negative terminal 3 side, the positive terminal 3 of the unit cell 1B and the other end of the connection terminal 2 are fixed with a fixing tool, and TIG welding is performed in this state, so that both the single cells are fixed. The batteries 1A and 1B are connected in series.
【０００８】[0008]
【発明が解決しようとする課題】ところで、上記に示す
従来技術は、極端子間接続を強固に行うことができるも
のの、以下の点について問題がある。即ち、第一の従来
技術は、接続端子の両側の形状に特徴を有するものであ
って、接続端子の一端側と単電池の正極端子，及び接続
端子の他端側と単電池の負極端子との接合をそれぞれＴ
ＩＧ溶接により行うようにしているものの、ＴＩＧ溶接
した場合、溶接電流が単電池に流れ、単電池が電気的に
破損することがある場合ついて配慮されていない問題が
ある。このようなことは、特に単電池を直列に多数個接
続した場合、一個の単電池でも破損していると、それを
外部からでは確認することができないので、一個ずつ調
査しなければならなくなる結果、かなりの労力の無駄と
なる。また第一の従来技術は、接続端子と単電池の正，
負極端子とが電気抵抗の小さいアルミニウム合金で形成
されているが、アルミニウム合金では空気中で酸化して
しまい、酸化被膜が発生するので、両者の接合を的確に
行うためには溶接に際し、酸化被膜を除去しなければな
らず、除去することについて配慮されていない。The above-described prior art, though capable of firmly connecting the pole terminals, has the following problems. That is, the first prior art has a feature in the shape of both sides of the connection terminal, one end of the connection terminal and the positive terminal of the cell, and the other end of the connection terminal and the negative terminal of the cell. T
Although the IG welding is performed, there is a problem that when the TIG welding is performed, a welding current flows to the unit cell and the unit cell may be electrically damaged. This is especially true when a large number of cells are connected in series, and even if a single cell is damaged, it cannot be confirmed from the outside, so it must be investigated one by one. , A considerable waste of effort. Also, the first prior art involves connecting terminals and cells,
The negative electrode terminal and the aluminum terminal are formed of an aluminum alloy with low electric resistance. However, the aluminum alloy is oxidized in the air, and an oxide film is generated. Must be removed and no consideration is given to removal.
【０００９】一方、第二の従来技術は、単電池１Ａ，１
Ｂと接続端子２とをＴＩＧ溶接するとき、アースクリッ
プ６を用いているので単電池が破損するおそれを解消す
ることができる。しかしながら、第二の従来技術は、ア
ースクリップ６のみならず、溶接すべき部分を固定する
ための固定具をも用いているので、それら固定具及びア
ースクリップの取付け工程のみならず取り外し工程が必
要になり、それだけ多くの手間がかかってしまい、作業
効率の低下をきたすと云う問題がある。On the other hand, the second prior art is based on the single cells 1A, 1A.
Since the ground clip 6 is used when TIG welding B and the connection terminal 2, it is possible to eliminate the possibility that the unit cell is damaged. However, the second prior art uses not only the earth clip 6 but also a fixing tool for fixing a portion to be welded, so that not only the fixing step of the fixing tool and the earth clip but also the removing step is required. This leads to a problem that much labor is required and the work efficiency is reduced.
【００１０】また、第二の従来技術においては、単電池
１Ａ及び１Ｂの正，負極端子３，４と接続端子２とがア
ルミニウムで形成されている関係上、表面に発生した酸
化被膜をヤスリ等で除去しているものの、その除去作業
に手間がかかると云う問題がある。In the second prior art, since the positive and negative terminals 3 and 4 and the connection terminal 2 of the cells 1A and 1B are made of aluminum, an oxide film generated on the surface is removed by a file or the like. However, there is a problem that the removal work is troublesome.
【００１１】さらに、固定具により単電池の正，負極端
子３，４と接続端子２の両側とを固定する場合、それら
極端子と接続端子の両端部との頂部（上先端部）を的確
に揃い合わせないと、ＴＩＧ溶接を的確に行うことがで
きず、不良品が発生することがあった。Further, when the positive and negative terminals 3, 4 of the unit cell and both sides of the connection terminal 2 are fixed by the fixture, the tops (upper end portions) of these pole terminals and both ends of the connection terminal must be precisely fixed. If they are not aligned, TIG welding cannot be performed accurately, resulting in defective products.
【００１２】本発明の目的は、上記従来技術の問題点に
鑑み、単電池と接続端子とを簡単な作業で効率良く確実
に接続することができるナトリウム−硫黄電池の端子接
続方法を提供することにあり、他の目的は、上記方法を
的確に実施し得るナトリウム−硫黄電池の端子接続構造
を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a terminal connection method for a sodium-sulfur battery capable of efficiently and reliably connecting a unit cell and a connection terminal with a simple operation in view of the above-mentioned problems of the prior art. Another object of the present invention is to provide a terminal connection structure of a sodium-sulfur battery capable of appropriately performing the above method.
【００１３】[0013]
【課題を解決するための手段】本発明では、予め、両側
の取付け部に単電池の正極端子及び負極端子の先端部と
係合し得る形状に形成された湾曲片を有する接続端子を
形成しておき、接続端子のそれぞれの湾曲片を双方の単
電池の極端子の先端部に係合して単電池の極端子と接続
端子の取付け部とを重ね合わせ、その重ね合わせた単電
池の極端子と接続端子の取付け部とを超音波接合するよ
うにしている。According to the present invention, a connection terminal having a curved piece formed in a shape that can be engaged with the tips of the positive electrode terminal and the negative electrode terminal of the unit cell is previously formed on the mounting portions on both sides. In advance, the respective bent pieces of the connection terminals are engaged with the tips of the pole terminals of both the cells, and the pole terminals of the cell and the mounting portions of the connection terminals are overlapped. The connector and the mounting portion of the connection terminal are ultrasonically bonded.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施例を図１及び
図２により説明する。図１は本発明方法を適用したナト
リウム−硫黄電池の接続端子構造の一実施例を示してい
る。本発明方法を実施するためのナトリウム−硫黄電池
の実施例は、図１に示すように、複数個（本例では二個
を示す）の単電池１Ａ，１Ｂと、これらを接続する接続
端子２とを有している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an embodiment of a connection terminal structure of a sodium-sulfur battery to which the method of the present invention is applied. As shown in FIG. 1, an embodiment of a sodium-sulfur battery for carrying out the method of the present invention comprises a plurality (two in this example) of cells 1A and 1B and a connection terminal 2 for connecting these cells. And
【００１５】各単電池１Ａ，１Ｂには正極端子３及び負
極端子４が設けられ、負極端子４が絶縁物５上で上方に
突出した状態で取付けられ、正極端子３が単電池の図示
しない部分から側部を経て上方に向かように設けられて
いる。本例では、一方の単電池１Ａの負極端子４と、他
方の単電池１Ｂの正極端子３とが接続端子２により直列
に接続され、これと同様にして多数個の単電池が直列接
続されることにより電力貯蔵用として用いられる。Each of the cells 1A and 1B is provided with a positive terminal 3 and a negative terminal 4, and the negative terminal 4 is mounted on the insulator 5 so as to protrude upward. From the upper side through the side portion. In this example, the negative electrode terminal 4 of one unit cell 1A and the positive terminal 3 of the other unit cell 1B are connected in series by the connection terminal 2, and similarly, a large number of unit cells are connected in series. It is used for power storage.
【００１６】接続端子２は、単電池１Ａ及び１Ｂの正，
負極端子３，４と同様にアルミニウムもしくはアルミ合
金によって形成された板体であり、その両側に取付け部
２ａ，２ｂがそれぞれ形成されている。The connection terminal 2 is connected to the positive and negative terminals of the cells 1A and 1B.
Like the negative electrode terminals 3 and 4, it is a plate body formed of aluminum or an aluminum alloy, and mounting portions 2a and 2b are formed on both sides thereof, respectively.
【００１７】これら各取付け部２ａ，２ｂは、その板幅
が単電池の正極端子３及び負極端子４とほぼ同寸法に形
成されると共に、その高さ寸法が負極端子４より短めに
形成されている。そして、各取付け部２ａ，２ｂの上端
部にはその先端部が前記正，負極端子３，４の板厚に相
当する寸法を隔てて下方に湾曲することにより湾曲片２
ｃが形成される。即ち、この湾曲片２ｃは、接続端子２
における取付け部２ａ及び２ｂの上端部が正，負極端子
３，４の板厚寸法分の半径をもって下方に湾曲すると共
に、その先端部がさらに正，負極端子３，４と平行とな
るよう若干下方に向かう形状をなして形成されており、
湾曲してできた空隙２ｄに正，負極端子の先端部を挟み
込むことにより、正，負極端子３，４と取付け部２ａ，
２ｂとが互いに重ね合わせるた状態で係合するようにし
ている。Each of these mounting portions 2a and 2b is formed so that the plate width is substantially the same as the positive terminal 3 and the negative terminal 4 of the unit cell, and the height is shorter than the negative terminal 4. I have. At the upper end of each of the mounting portions 2a and 2b, the front end thereof is bent downward by a distance corresponding to the plate thickness of the positive and negative electrode terminals 3 and 4, thereby forming a curved piece 2a.
c is formed. That is, the curved piece 2c is connected to the connection terminal 2
The upper ends of the mounting portions 2a and 2b are curved downward with a radius corresponding to the thickness of the positive and negative electrode terminals 3 and 4, and the front ends thereof are further slightly lowered so as to be parallel to the positive and negative terminals 3 and 4. It is formed in a shape toward
The positive and negative terminals 3, 4 and the mounting portions 2a, 2a,
2b are engaged with each other in an overlapping state.
【００１８】従って、接続端子２は、接合に際し、一端
側の取付け部２ａの湾曲片２ｃに単電池１Ａの負極端子
４の上端部を挟み込ませて係合することにより、取付け
部２ａを負極端子４に重ね合わせた状態で位置決めする
と共に、取付け部２ｂの湾曲片２ｃに単電池１Ｂの正極
端子３の先端部を挟み込ませて係合することにより、取
付け部２ｂを正極端子３に重ね合わせた状態で位置決め
する。Therefore, the connection terminal 2 is engaged with the curved piece 2c of the mounting portion 2a at one end by sandwiching the upper end portion of the negative electrode terminal 4 of the unit cell 1A, thereby connecting the mounting portion 2a to the negative terminal. 4, the mounting portion 2b was superimposed on the positive electrode terminal 3 by sandwiching the tip of the positive electrode terminal 3 of the unit cell 1B with the curved piece 2c of the mounting portion 2b and engaging with the curved piece 2c of the mounting portion 2b. Position in the state.
【００１９】上記の如くして接続端子２の両取付け部２
ａ，２ｂを単電池１Ａの負極端子４及び単電池１Ｂの正
極端子３に位置決めした後、図２に示すように、超音波
ホーン７のチップ８Ａとアンビル９のチップ８Ｂとで単
電池１Ａの負極端子４，接続端子２の一端側の取付け部
２ａを挟持する。次いで、これら負極端子４，取付け部
２ａに対しチップ８Ａを介し超音波ホーン７より超音波
振動を与えると、負極端子４と取付け部２ａとのチップ
Ａに対向する部分が互いに超音波振動して接合される。As described above, the two mounting portions 2 of the connection terminal 2
After positioning a and 2b on the negative terminal 4 of the cell 1A and the positive terminal 3 of the cell 1B, as shown in FIG. 2, the chip 8A of the ultrasonic horn 7 and the chip 8B of the anvil 9 form the cell 1A. The mounting portion 2a at one end of the negative terminal 4 and the connection terminal 2 is sandwiched. Next, when ultrasonic vibration is applied to the negative electrode terminal 4 and the mounting portion 2a from the ultrasonic horn 7 via the chip 8A, the portions of the negative electrode terminal 4 and the mounting portion 2a facing the chip A ultrasonically vibrate with each other. Joined.
【００２０】以下、同様にして単電池１Ｂの正極端子
３，接続端子２の他端側の取付け部２ａを超音波ホーン
７のチップ８Ａとアンビル９のチップ８Ｂとで挟持し、
これら正極端子３，取付け部２ｂに対しチップ８Ａを介
し超音波ホーン７より超音波振動を与えることにより、
正極端子３と取付け部２ｂとのチップＡに対向する部分
が超音波振動して接合される。従って、単電池１Ａの負
極端子４及び単電池１Ｂの正極端子３に対し接続端子２
が超音波接合されることとなる。なお、超音波ホーン７
のチップ８Ａ及びアンビル９のチップ８Ｂは、ユーザサ
イドで製作するものであり、その大きさ，形状等は種々
選定されることとなる。Similarly, the positive electrode terminal 3 of the unit cell 1B and the mounting portion 2a at the other end of the connection terminal 2 are sandwiched between the chip 8A of the ultrasonic horn 7 and the chip 8B of the anvil 9,
By applying ultrasonic vibration to the positive electrode terminal 3 and the mounting portion 2b from the ultrasonic horn 7 via the chip 8A,
The portion of the positive electrode terminal 3 and the mounting portion 2b facing the chip A is joined by ultrasonic vibration. Therefore, the connection terminal 2 is connected to the negative terminal 4 of the cell 1A and the positive terminal 3 of the cell 1B.
Are ultrasonically bonded. The ultrasonic horn 7
The chip 8A of the anvil 9 and the chip 8B of the anvil 9 are manufactured on the user side, and the size, shape, and the like are variously selected.
【００２１】本発明方法では、以上の如く、予め、接続
端子２の両取付け部２ａ，２ｂに単電池１Ａ，１Ｂの
正，負極端子３，４の先端部を挟み込んで係合する湾曲
片２ｃがそれぞれ形成され、それら湾曲片２ｃが単電池
１Ａの負極端子４と単電池１Ｂの正極端子３とに係合す
ることにより、これら極端子３，４と取付け部２ｂ，２
ａとを互いに重ね合わせた状態で位置決めした後、接続
端子２の取付け部２ａと単電池１Ａの負極端子４とを、
また接続端子２の取付け部２ｂと単電池１Ｂの正極端子
３とをそれぞれ超音波接合するように構成したので、Ｔ
ＩＧ溶接を行う従来技術のように溶接電流で単電池が破
損するのを確実に防ぐことができる。According to the method of the present invention, as described above, the curved piece 2c which sandwiches the tips of the positive and negative terminals 3 and 4 of the cells 1A and 1B in advance and engages with both mounting portions 2a and 2b of the connection terminal 2 in advance. Are formed, and the bent pieces 2c are engaged with the negative terminal 4 of the unit cell 1A and the positive terminal 3 of the unit cell 1B, so that these pole terminals 3, 4 and the mounting portions 2b, 2
a are positioned in a state of being superimposed on each other, and then the mounting portion 2a of the connection terminal 2 and the negative electrode terminal 4 of the cell 1A are
In addition, since the attachment portion 2b of the connection terminal 2 and the positive terminal 3 of the cell 1B are each ultrasonically bonded,
It is possible to reliably prevent the unit cell from being damaged by the welding current as in the conventional technique of performing IG welding.
【００２２】また、超音波接合では、超音波ホーン７側
のチップ８Ａとアンビル９のチップ８Ｂとで極端子及び
接続端子２を挟み込むだけであるので、第二の従来技術
のように固定具，アースクリップの双方を用いることが
不要になるばかりでなく、極端子と接続端子２の取付け
部２ａ，２ｂとの先端部の位置を一致させなくとも確実
に接合することができ、作業工数及び労力を大幅に低減
することができる。しかも、接続端子２の取付け部２
ａ，２ｂに形成された湾曲片２ｃにより、取付け部２
ａ，２ｂと極端子４，３とを互いに重ね合わせた状態に
係合できるので、超音波接合に際し、チップ８Ａ，８Ｂ
による挟み込み作業を容易に行え、作業性をいっそう高
めることができる。Further, in the ultrasonic bonding, since only the pole terminal and the connection terminal 2 are sandwiched between the chip 8A of the ultrasonic horn 7 and the chip 8B of the anvil 9, the fixing tool, Not only is it unnecessary to use both of the ground clips, but also it is possible to securely join the pole terminals and the mounting portions 2a and 2b of the connection terminals 2 without making the positions of the tip portions coincide with each other. Can be greatly reduced. Moreover, the mounting portion 2 of the connection terminal 2
a, 2b, the mounting portion 2
a and 2b and the pole terminals 4 and 3 can be engaged in a state of being overlapped with each other.
, The work can be easily performed, and the workability can be further improved.
【００２３】さらに、超音波接合では、超音波ホーン７
側のチップＡから極端子及び接続端子２に超音波振動を
伝え、それら両者が互いに擦り合うことによって接合さ
れるので、極端子及び接合端子２の両者に酸化被膜が発
生していても、その超音波振動により、酸化被膜が必然
的に除去されることとなる結果、極端子や接続端子２が
電気抵抗の低いアルミニウム（もしくはアルミニウム合
金）で形成されていても、酸化被膜をいちいち除去する
ことが不要になり、作業工数のいっそうの低減を図るこ
とができる。Further, in the ultrasonic bonding, the ultrasonic horn 7
Ultrasonic vibration is transmitted from the chip A on the side to the pole terminal and the connection terminal 2 and they are joined by rubbing each other, so that even if an oxide film is generated on both the pole terminal and the connection terminal 2, As a result of the ultrasonic vibration, the oxide film is inevitably removed, so that even if the pole terminals and the connection terminals 2 are made of aluminum (or aluminum alloy) having a low electric resistance, the oxide film is removed one by one. Becomes unnecessary, and the number of work steps can be further reduced.
【００２４】なお、図示実施例では、超音波の周波数を
２０ｋＨｚに設定して行ったが、その超音波周波数は接
合時間，接合対象物の材質等に応じ適宜選定されるのは
勿論である。また、極端子３，４及び取付け部２ｂ，２
ａを挟み付ける超音波ホーン７側のチップ８Ａとアンビ
ル９側のチップ８Ｂとの押圧力も、チップ自体の材質，
大きさ，形状のみならず、極端子や接続端子２の材質及
び形状等をも考慮して適宜選定されるものである。さら
に、単電池１Ａと１Ｂとを直列に接続する例を示した
が、並列に接続する場合にも適用することができる。In the illustrated embodiment, the frequency of the ultrasonic wave is set to 20 kHz. However, the ultrasonic frequency is appropriately selected according to the welding time, the material of the object to be welded, and the like. Further, the pole terminals 3 and 4 and the mounting portions 2b and 2
The pressing force between the tip 8A on the ultrasonic horn 7 side and the tip 8B on the anvil 9 side that sandwiches a is determined by the material of the tip itself,
It is appropriately selected in consideration of not only the size and shape but also the material and shape of the pole terminal and the connection terminal 2. Further, the example in which the unit cells 1A and 1B are connected in series has been described, but the present invention can also be applied to a case where the unit cells are connected in parallel.
【００２５】[0025]
【発明の効果】以上述べたように、本発明によれば、接
続端子における両取付け部の湾曲片が、単電池の極端子
に係合し、極端子と取付け部とを互いに重ね合わせた状
態で位置決めし、接続端子の取付け部と双方の単電池の
極端子とをそれぞれ超音波接合するように構成したの
で、溶接電流で単電池が破損するのを確実に防ぐことが
でき、また、超音波接合では極端子及び接続端子を挟み
込むだけであるので、固定具，アースクリップの双方を
用いることが不要になるばかりでなく、極端子と取付け
部との先端部の位置を一致させなくとも確実に接合で
き、従って、簡単な作業で安全にかつ確実に接続するで
きる結果、作業工数及び労力を大幅に低減できる効果が
ある。As described above, according to the present invention, the bent pieces of the two attachment portions of the connection terminal are engaged with the pole terminals of the unit cell, and the pole terminals and the attachment portion are overlapped with each other. It is configured to be ultrasonically bonded to the connection terminal attachment portion and the pole terminals of both cells, so that the cell can be reliably prevented from being damaged by welding current, and Since only the pole terminal and the connection terminal are sandwiched in the sonic bonding, not only is it unnecessary to use both the fixing tool and the ground clip, but also it is possible to ensure that the position of the tip of the pole terminal and the mounting portion does not coincide. Therefore, as a result of being able to connect safely and securely with a simple operation, the number of work steps and labor can be greatly reduced.
【図１】本発明方法を適用したナトリウム−硫黄電池の
接続端子構造の一実施例を示す分解斜視図。FIG. 1 is an exploded perspective view showing one embodiment of a connection terminal structure of a sodium-sulfur battery to which the method of the present invention is applied.
【図２】接続端子の一端側の取付け部を単電池の負極端
子に超音波接合する状態を示す説明図。FIG. 2 is an explanatory view showing a state where an attachment portion on one end side of a connection terminal is ultrasonically joined to a negative electrode terminal of a unit cell.
【図３】従来の単電池の負極端子と接続端子との接続状
態を示す説明用斜視図。FIG. 3 is an explanatory perspective view showing a connection state between a negative electrode terminal and a connection terminal of a conventional unit cell.
１Ａ，１Ｂ…単電池、２…接続端子、２ａ，２ｂ…取付
け部、２ｃ…湾曲片、３…単電池の正極端子、４…単電
池の負極端子、７…超音波ホーン、８Ａ，８Ｂ…チッ
プ、９…アンビル。1A, 1B ... cell, 2 ... connection terminal, 2a, 2b ... attachment part, 2c ... curved piece, 3 ... cell positive electrode terminal, 4 ... cell negative electrode terminal, 7 ... ultrasonic horn, 8A, 8B ... Tip, 9 ... anvil.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 坂口 繁 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内 Ｆターム(参考） 5H022 AA14 AA19 BB03 BB17 CC02 CC09 CC12 5H029 AJ14 AK05 AL13 BJ02 BJ06 CJ05 DJ05 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shigeru Sakaguchi 3-1-1, Sachimachi, Hitachi-shi, Ibaraki F-term in Hitachi, Ltd. Hitachi Plant (Reference) 5H022 AA14 AA19 BB03 BB17 CC02 CC09 CC12 5H029 AJ14 AK05 AL13 BJ02 BJ06 CJ05 DJ05
Claims (2)
端子と、他方の単電池における正，負何れかの極端子と
を接続端子により互いに接合するナトリウム−硫黄電池
の端子接続方法において、予め、両側の取付け部に単電
池の正極端子及び負極端子の先端部と係合し得る形状に
形成された湾曲片を有する接続端子を形成しておき、接
続端子のそれぞれの湾曲片を双方の単電池の極端子の先
端部に係合して単電池の極端子と接続端子の取付け部と
を重ね合わせ、その重ね合わせた単電池の極端子と接続
端子の取付け部とを超音波接合することを特徴とするナ
トリウム−硫黄電池の端子接続方法。1. A terminal connection method for a sodium-sulfur battery in which either a positive or negative pole terminal of one cell and a positive or negative pole terminal of the other cell are joined to each other by a connection terminal. In advance, connection terminals having curved pieces formed in a shape that can be engaged with the tips of the positive electrode terminal and the negative electrode terminal of the unit cell are formed on the mounting portions on both sides in advance, and each curved piece of the connection terminal is attached to both sides. The electrode terminal of the unit cell and the mounting part of the connection terminal are overlapped by engaging with the tip of the pole terminal of the cell, and the superposed unit cell electrode terminal and the mounting part of the connection terminal are ultrasonically bonded. A terminal connection method for a sodium-sulfur battery.
らのうち、一方の単電池の正，負何れかの極端子と他方
の単電池の正，負何れかの極端子とを超音波振動により
接合する接続端子とを有し、かつ該接続端子は、両側の
取付け部に単電池の正極端子及び負極端子の先端部に係
合すると共に、取付け部を単電池の極端子と重ね合わせ
る形状の湾曲片をそれぞれ設けることを特徴とするナト
リウム−硫黄電池の端子接続構造。2. An ultrasonic vibration device comprising at least two unit cells, and a positive or negative pole terminal of one of the unit cells and a positive or negative pole terminal of the other unit cell. And a connection terminal that is engaged with the tips of the positive terminal and the negative terminal of the unit cell at the mounting portions on both sides, and the mounting portion is overlapped with the pole terminal of the unit cell. A terminal connection structure for a sodium-sulfur battery, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10334441A JP2000164200A (en) | 1998-11-25 | 1998-11-25 | Method for terminal connection of sodium-sulfur battery and terminal connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10334441A JP2000164200A (en) | 1998-11-25 | 1998-11-25 | Method for terminal connection of sodium-sulfur battery and terminal connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000164200A true JP2000164200A (en) | 2000-06-16 |
Family
ID=18277427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10334441A Pending JP2000164200A (en) | 1998-11-25 | 1998-11-25 | Method for terminal connection of sodium-sulfur battery and terminal connection structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000164200A (en) |
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-
1998
- 1998-11-25 JP JP10334441A patent/JP2000164200A/en active Pending
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|---|---|---|---|---|
| JP4543310B2 (en) * | 2004-05-17 | 2010-09-15 | 株式会社デンソー | Electrode bonding method and electrode assembly |
| JP2005327677A (en) * | 2004-05-17 | 2005-11-24 | Denso Corp | Jointing method of electrode and electrode junction |
| US9178192B2 (en) | 2011-05-13 | 2015-11-03 | Lg Chem, Ltd. | Battery module and method for manufacturing the battery module |
| US9496544B2 (en) | 2011-07-28 | 2016-11-15 | Lg Chem. Ltd. | Battery modules having interconnect members with vibration dampening portions |
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