JP2003346882A - Battery - Google Patents
BatteryInfo
- Publication number
- JP2003346882A JP2003346882A JP2002153788A JP2002153788A JP2003346882A JP 2003346882 A JP2003346882 A JP 2003346882A JP 2002153788 A JP2002153788 A JP 2002153788A JP 2002153788 A JP2002153788 A JP 2002153788A JP 2003346882 A JP2003346882 A JP 2003346882A
- Authority
- JP
- Japan
- Prior art keywords
- power generating
- generating element
- battery
- electrode
- main body
- 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
- 239000007788 liquid Substances 0.000 abstract description 14
- 239000008151 electrolyte solution Substances 0.000 abstract description 6
- 239000000243 solution Substances 0.000 abstract 1
- 239000011888 foil Substances 0.000 description 21
- 239000011255 nonaqueous electrolyte Substances 0.000 description 16
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 238000010248 power generation Methods 0.000 description 8
- 239000003792 electrolyte Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000011889 copper foil Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 229910000881 Cu alloy Inorganic materials 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 239000011149 active material Substances 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 101100116283 Arabidopsis thaliana DD11 gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Secondary Cells (AREA)
- Primary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、巻回型の発電要素
の端面からはみ出した電極に集電接続体の電極接続部を
接続することにより集電を行う電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery for collecting current by connecting an electrode connecting portion of a current collecting connector to an electrode protruding from an end face of a wound type power generating element.
【０００２】[0002]
【従来の技術】図２に、大型の非水電解質二次電池にお
ける従来の発電要素１と集電接続体２の接続構造を示
す。この非水電解質二次電池は、２個の長円筒形の発電
要素１，１を並べ並列接続したものである。各発電要素
１は、正極１ａと負極１ｂをセパレータを介して長円筒
形に巻回したものであり、正極１ａは帯状のアルミニウ
ム箔の表面に正極活物質を担持させ、負極１ｂは帯状の
銅箔の表面に負極活物質を担持させたものである。ただ
し、これらの正極１ａと負極１ｂは、それぞれ帯状の片
方の側端部に活物質を塗布しない未塗工部を設けてお
き、この未塗工部でアルミニウム箔と銅箔が露出するよ
うにしている。そして、これらの正極１ａと負極１ｂ
は、発電要素１の巻回の際に、巻回軸に沿って互いに反
対方向にずらすことにより、長円筒形の一方（図示右
下）の端面には正極１ａの側端部のアルミニウム箔のみ
がはみ出し、他方（図示左上）の端面には負極１ｂの側
端部の銅箔のみがはみ出すようにしている。従って、こ
れらの電極１ａ，１ｂの金属箔は、上下端部でそれぞれ
湾曲して重なり合った湾曲部と、これらの湾曲部の間で
垂直方向の平坦な箔として重なり合った直線部とからな
る長円筒形として各発電要素１の両端面からはみ出すこ
とになる。2. Description of the Related Art FIG. 2 shows a conventional connection structure between a power generating element 1 and a current collector 2 in a large non-aqueous electrolyte secondary battery. This non-aqueous electrolyte secondary battery is a battery in which two long cylindrical power generating elements 1 and 1 are arranged and connected in parallel. Each power generating element 1 is obtained by winding a positive electrode 1a and a negative electrode 1b in a long cylindrical shape with a separator interposed therebetween. The positive electrode 1a has a positive electrode active material carried on the surface of a strip-shaped aluminum foil, and the negative electrode 1b has a strip-shaped copper. The negative electrode active material is supported on the surface of the foil. However, each of the positive electrode 1a and the negative electrode 1b is provided with an uncoated portion to which the active material is not applied at one side end of the strip, and the aluminum foil and the copper foil are exposed at the uncoated portion. ing. Then, these positive electrode 1a and negative electrode 1b
Is displaced in opposite directions along the winding axis when the power generating element 1 is wound, so that only one aluminum foil at the side end of the positive electrode 1a is provided on one end face (lower right in the figure) of the long cylindrical shape. Only the copper foil on the side end of the negative electrode 1b protrudes from the other end face (upper left in the figure). Therefore, the metal foil of these electrodes 1a and 1b is a long cylinder composed of a curved portion which is curved and overlapped at the upper and lower ends, and a straight portion which is overlapped as a flat flat foil between these curved portions. The shape protrudes from both end faces of each power generating element 1.
【０００３】上記２個の発電要素１，１は、長円筒形の
平坦な側面同士が直立して重なり合うように横置きに並
べられる。そして、これら２個の発電要素１，１の両端
部にそれぞれ集電接続体２，２が配置されている。集電
接続体２，２は、発電要素１の一方の端部に配置する正
極１ａ側のものはアルミニウム合金板からなり、他方の
端部に配置する負極１ｂ側のものは銅合金板からなる。
各集電接続体２は、ほぼ台形状の水平に配置された本体
２ａと、この本体の台形状の底辺部から下方に向けて突
設された４本の細長い電極接続部２ｂとからなる。ま
た、各電極接続部２ｂには、板面から突出する凸部が適
宜間隔で複数箇所ずつ形成されている。即ち、各集電接
続体２は、アルミニウム合金板や銅合金板を、台形状の
本体２ａとこの台形状の底辺部から櫛歯状に真っ直ぐ伸
びた細長い４本の電極接続部２ｂとをプレス加工により
打ち抜くと共に各電極接続部２ｂに凸部を形成し、これ
らの電極接続部２ｂを基部で本体２ａに対して直角に折
り曲げ、折り曲げた各電極接続部２ｂを基部でそれぞれ
９０度ねじることにより形成される。また、これら４本
の電極接続部２ｂは、左右の２本ずつが対となり、各対
の２本の電極接続部２ｂの向かい合う側辺が本体２ａ側
とは反対方向に回転するようにねじっている。そして、
各電極接続部２ｂの凸部は、このねじりによって、対と
なるもの同士が向かい合う方向に突出するように突設さ
れている。[0003] The two power generating elements 1 and 1 are arranged side by side so that flat sides of a long cylinder shape are overlapped upright. Then, current collecting connectors 2 and 2 are arranged at both ends of these two power generating elements 1 and 1, respectively. The collectors 2 and 2 are composed of an aluminum alloy plate on the side of the positive electrode 1a disposed at one end of the power generating element 1 and formed of a copper alloy plate on the side of the negative electrode 1b disposed at the other end of the power generating element 1. .
Each current collector 2 includes a substantially trapezoidal horizontally arranged main body 2a and four elongated electrode connection parts 2b protruding downward from the trapezoidal bottom of the main body. Also, a plurality of projections projecting from the plate surface are formed at appropriate intervals on each electrode connection portion 2b. That is, each current collector 2 is formed by pressing an aluminum alloy plate or a copper alloy plate with a trapezoidal main body 2a and four elongated electrode connection portions 2b extending straight from the bottom of the trapezoidal shape in a comb shape. By punching out by processing and forming a convex portion on each electrode connecting portion 2b, bending these electrode connecting portions 2b at right angles to the main body 2a at the base, and twisting each bent electrode connecting portion 2b at the base by 90 degrees. It is formed. The four electrode connection portions 2b are twisted so that the left and right two pairs are paired, and the opposite sides of the two electrode connection portions 2b of each pair rotate in the opposite direction to the main body 2a side. I have. And
The projecting portion of each electrode connecting portion 2b is formed so as to project by the twist in such a manner that a paired member projects in a direction facing each other.
【０００４】上記各集電接続体２は、２個の発電要素
１，１の側面の双方の端部の上方に本体２ａを配置する
と共に、各電極接続部２ｂがこれらの発電要素１，１の
端面に沿って配置されるようにする。即ち、各発電要素
１の正極１ａのアルミニウム箔がはみ出す端面側には、
アルミニウム合金板からなる集電接続体２が配置され、
負極１ｂの銅箔がはみ出す端面側には、銅合金板からな
る集電接続体２が配置される。また、各発電要素１の端
面からはみ出す電極１ａ，１ｂの金属箔は、対となる２
本の電極接続部２ｂの間に長円筒形の直線部を挟み込ま
れる。In each of the current collectors 2, a main body 2a is disposed above both ends of the side surfaces of the two power generating elements 1, 1 and each electrode connecting portion 2b is connected to these power generating elements 1, 1 So that it is arranged along the end face of. That is, on the end face side where the aluminum foil of the positive electrode 1a of each power generating element 1 protrudes,
A current collecting connector 2 made of an aluminum alloy plate is arranged,
On the end face side of the negative electrode 1b where the copper foil protrudes, a current collector 2 made of a copper alloy plate is arranged. Further, the metal foils of the electrodes 1a and 1b protruding from the end faces of the power generating elements 1
An elongated cylindrical linear portion is interposed between the electrode connecting portions 2b.
【０００５】このようにして集電接続体２が配置される
と、発電要素１の正極１ａと負極１ｂの金属箔が挟持板
３によって各電極接続部２ｂに接続固定される。即ち、
各発電要素１の双方の端面では、まず金属箔の直線部の
重なりを巻回軸を中心に左右に振り分けて、それぞれの
側の電極接続部２ｂに沿わせ、これらの電極接続部２ｂ
と電極１ａ，１ｂの金属箔とを挟持板３で挟んで挟持さ
せる。すると、対となる２本の電極接続部２ｂの内側の
面には、それぞれ金属箔の長円筒形の直線部の左右半分
ずつの重なりが密着することになる。そして、このよう
にして電極接続部２ｂと金属箔を挟持した各挟持板３の
両側から超音波溶接を行うことにより、これら電極接続
部２ｂと電極１ａ，１ｂの金属箔とが接合される。この
際、各電極接続部２ｂには、金属箔と重なり合う内側の
面に凸部が形成されているので、これらの金属箔が各凸
部で集中的に超音波のエネルギーを受けるようになり、
溶着による接合を確実なものにすることができる。各挟
持板３は、短冊状の比較的薄い金属板を長手方向に沿っ
て中央で二つ折りにしたものであり、正極１ａ側にはア
ルミニウム合金板の挟持板３が用いられ、負極１ｂ側に
は銅合金板の挟持板３が用いられる。[0005] When the current collecting connector 2 is disposed in this manner, the metal foils of the positive electrode 1a and the negative electrode 1b of the power generating element 1 are connected and fixed to each electrode connecting portion 2b by the sandwiching plate 3. That is,
On both end faces of each power generating element 1, first, the overlap of the linear portions of the metal foil is distributed to the left and right around the winding axis, along the electrode connection portions 2b on each side, and these electrode connection portions 2b
And the metal foil of the electrodes 1a and 1b are sandwiched by the sandwiching plate 3 to be sandwiched. Then, the left and right halves of the long cylindrical portion of the metal foil overlap each other on the inner surfaces of the paired two electrode connection portions 2b. Then, by performing ultrasonic welding from both sides of each holding plate 3 holding the electrode connecting portion 2b and the metal foil in this way, the electrode connecting portion 2b and the metal foil of the electrodes 1a and 1b are joined. At this time, in each of the electrode connecting portions 2b, since convex portions are formed on the inner surface overlapping with the metal foil, these metal foils receive ultrasonic energy intensively at each convex portion,
Bonding by welding can be ensured. Each sandwiching plate 3 is formed by folding a strip-shaped relatively thin metal plate along the longitudinal direction into two at the center. The sandwiching plate 3 of an aluminum alloy plate is used for the positive electrode 1a side, and The holding plate 3 of a copper alloy plate is used.
【０００６】上記集電接続体２，２は、実際には図３に
示すように、正負極の端子４，４と共にステンレス鋼板
製の蓋板５の両端部に取り付けられる。端子４，４は、
蓋板５を上方から貫通してそれぞれ蓋板５の下方に配置
した集電接続体２，２の本体２ａ，２ａにカシメによっ
て接続固定される。また、この際、集電接続体２，２と
端子４，４との間に絶縁封止材を介在させることによ
り、端子４，４が蓋板５を貫通する孔を封止すると共
に、集電接続体２，２や端子４，４とこの蓋板５との間
を絶縁するようになっている。このようにして蓋板５の
両端部に集電接続体２，２と端子４，４が取り付けられ
ると、これらの集電接続体２，２の各対の電極接続部２
ｂに上記のようにして発電要素１，１が接続される。そ
して、これら２個の発電要素１は、ステンレス鋼板製の
筐体状の電池容器６の内部に上方から挿入して収納さ
れ、この電池容器６の上端開口部が蓋板５によって塞ぐ
と共に、この蓋板５の周囲を溶接によって封止する。ま
た、電池容器６の側面に開口した注液口６ａから内部に
電解液を注入し、この注液口６ａを封口することにより
非水電解質二次電池となる。As shown in FIG. 3, the current collectors 2 and 2 are attached to both ends of a cover plate 5 made of a stainless steel plate together with terminals 4 and 4 of positive and negative electrodes. Terminals 4 and 4
It penetrates the cover plate 5 from above, and is connected and fixed to the main bodies 2a, 2a of the current collectors 2, 2 arranged below the cover plate 5, respectively. Also, at this time, by interposing an insulating sealing material between the current collecting connectors 2 and 2 and the terminals 4 and 4, the terminals 4 and 4 seal the holes passing through the cover plate 5 and collect the current. The electrical connection bodies 2 and 2 and the terminals 4 and 4 are insulated from the cover plate 5. When the current collecting connectors 2 and 2 and the terminals 4 and 4 are attached to both ends of the cover plate 5 in this manner, the electrode connecting portions 2 of each pair of the current collecting connectors 2 and 2 are attached.
The power generating elements 1 and 1 are connected to b as described above. These two power generating elements 1 are inserted and housed from above into a housing-like battery case 6 made of a stainless steel plate, and the upper end opening of the battery case 6 is closed by a cover plate 5. The periphery of the cover plate 5 is sealed by welding. Further, an electrolyte is injected into the inside of the battery container 6 from a liquid injection port 6a opened on the side surface of the battery container 6, and the non-aqueous electrolyte secondary battery is obtained by closing the liquid injection port 6a.
【０００７】[0007]
【発明が解決しようとする課題】ところが、上記従来の
非水電解質二次電池は、図４に示すように、発電要素１
の側面と集電接続体２の本体２ａとの間に隙間がないの
で、電池容器６の側面の注液口６ａから電解液の注液を
行っても、この電解液が電池容器６の内部全体に拡散し
難く、注液工程に長い時間を要するという問題があっ
た。However, the conventional non-aqueous electrolyte secondary battery has a power generation element 1 as shown in FIG.
Since there is no gap between the side of the battery container 6 and the main body 2a of the current collecting connector 2, even if the electrolyte is injected from the injection port 6a on the side of the battery container 6, There is a problem that it is difficult to diffuse into the whole, and a long time is required for a liquid injection process.
【０００８】本発明は、かかる事情に対処するためにな
されたものであり、発電要素の側面と集電接続体の本体
との間に間隙を設けることにより、注液口から注液した
電解液の回りが良く注液性が良好となる電池を提供する
ことを目的としている。The present invention has been made in order to cope with such a situation, and provides a gap between a side surface of a power generating element and a main body of a current collecting connector so that an electrolytic solution injected from a liquid inlet is provided. It is an object of the present invention to provide a battery having a good circumference and good injectability.
【０００９】[0009]
【課題を解決するための手段】請求項１の電池は、巻回
型の発電要素の側面の端部に沿って配置した集電接続体
の本体から突設した電極接続部を、この発電要素の端面
からはみ出した電極に接続することにより集電を行う電
池において、発電要素の端部の側面と集電接続体の本体
との間に間隙を設けたことを特徴とする。According to a first aspect of the present invention, there is provided a battery, wherein an electrode connecting portion protruding from a main body of a current collector connected along a side end portion of a winding type power generating element is connected to the power generating element. In a battery that performs current collection by connecting to an electrode protruding from an end surface of the power generation element, a gap is provided between a side surface of an end portion of the power generation element and a main body of the current collection connection body.
【００１０】請求項１の発明によれば、発電要素の側面
と集電接続体の本体との間に間隙があることにより、注
液口から注入した電解液がこの間隙を通って迅速に内部
に拡散するようになる。According to the first aspect of the present invention, since there is a gap between the side surface of the power generating element and the main body of the current collecting connector, the electrolyte injected from the liquid inlet quickly passes through the gap. Will spread to.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施形態について
図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】図１は本発明の一実施形態を示すものであ
って、非水電解質二次電池の発電要素と集電接続体の配
置構造を示す部分縦断面正面図である。なお、図２〜図
４に示した従来例と同様の機能を有する構成部材には同
じ番号を付記する。FIG. 1 shows one embodiment of the present invention, and is a partial longitudinal sectional front view showing an arrangement structure of a power generating element and a current collecting connector of a non-aqueous electrolyte secondary battery. Components having the same functions as those of the conventional example shown in FIGS. 2 to 4 are denoted by the same reference numerals.
【００１３】本実施形態は、従来例と同様の構成の大型
の非水電解質二次電池について説明する。この非水電解
質二次電池は、図２及び図３に示した従来例と同様に、
２個の長円筒形の発電要素１，１を横置きに並べて並列
接続したものであり、各発電要素１は、長円筒形の一方
の端面からは正極１ａの側端部のアルミニウム箔がはみ
出すと共に、他方の端面からは負極１ｂの側端部の銅箔
がはみ出すようになっている。In the present embodiment, a large non-aqueous electrolyte secondary battery having the same configuration as that of the conventional example will be described. This non-aqueous electrolyte secondary battery is similar to the conventional example shown in FIGS.
Two long cylindrical power generating elements 1 and 1 are arranged side by side and connected in parallel. In each power generating element 1, the aluminum foil at the side end of the positive electrode 1a protrudes from one end surface of the long cylindrical shape. At the same time, the copper foil on the side end of the negative electrode 1b protrudes from the other end face.
【００１４】上記各発電要素１は、一方の端面からはみ
出した長円筒形の正極１ａのアルミニウム箔の直線部が
一方の集電接続体２の対となる２本の電極接続部２ｂの
間に挟み込まれる。また、各発電要素１の他方の端面か
らはみ出した長円筒形の負極１ｂの銅箔の直線部も、他
方の集電接続体２の対となる２本の電極接続部２ｂの間
に挟み込まれる。そして、従来例と同様に、これらの金
属箔が挟持板３によってそれぞれ各電極接続部２ｂに接
続固定される。Each of the power generating elements 1 has a straight cylindrical portion of the aluminum foil of the long-cylindrical positive electrode 1a protruding from one end face between two electrode connecting portions 2b forming a pair of one current collecting connector 2. It is sandwiched. In addition, the linear portion of the copper foil of the long cylindrical negative electrode 1 b protruding from the other end face of each power generating element 1 is also sandwiched between the two electrode connecting portions 2 b that form a pair with the other current collecting connector 2. . Then, similarly to the conventional example, these metal foils are connected and fixed to the respective electrode connecting portions 2b by the sandwiching plate 3.
【００１５】上記各発電要素１とこの発電要素１の側面
の両端部の上方に配置された集電接続体２の本体２ａと
の間には、図１に示すように、間隙Ｓが設けられる。図
４に示した従来例であれば、電池容器６の内部の容積効
率を高めるために、発電要素１の側面の上端のセパレー
タやこれを覆う絶縁シートが集電接続体２の本体２ａの
下面に接するように間隙なく配置していた。しかしなが
ら、本実施形態では、集電接続体２の電極接続部２ｂの
突出長さを少し長くすることにより、発電要素１の接続
位置を下げて、本体２ａとの間に間隙Ｓが設けられるよ
うにしている。また、このために、電池容器６も若干容
器状の内部を深くしている。間隙Ｓは、図示を省略して
いる絶縁材等を配置することもなく、空間としてあけて
おく必要がある。この間隙Ｓは、空気で満たされたまま
にするよりも、負活性ガスを充填したり真空状態にして
おくことが好ましい。As shown in FIG. 1, a gap S is provided between each of the power generating elements 1 and the main body 2a of the current collector 2 disposed above both ends of the side surface of the power generating element 1. . In the case of the conventional example shown in FIG. 4, in order to increase the volumetric efficiency inside the battery case 6, the separator at the upper end of the side surface of the power generating element 1 and the insulating sheet covering the separator are provided on the lower surface of the main body 2 a of the current collector 2. Was arranged without a gap so as to be in contact with. However, in the present embodiment, by slightly increasing the projecting length of the electrode connecting portion 2b of the current collecting connector 2, the connection position of the power generating element 1 is lowered, and the gap S is provided between the power generating element 1 and the main body 2a. I have to. To this end, the battery container 6 also has a slightly deeper container-like interior. The gap S needs to be provided as a space without arranging an insulating material or the like (not shown). The gap S is preferably filled with a negative active gas or kept in a vacuum state, rather than being filled with air.
【００１６】なお、集電接続体２の本体２ａは、蓋板５
の裏面に配置した絶縁封止材７の下面の凹部に嵌め込ま
れて固定される。図１と図４では、電池容器６と共にこ
の絶縁封止材７も、縦断面で示している。The main body 2a of the current collecting connector 2 is
And is fixed by being fitted into a concave portion on the lower surface of the insulating sealing material 7 disposed on the back surface. 1 and 4, the insulating sealing material 7 is shown in a longitudinal section together with the battery container 6.
【００１７】上記２個の発電要素１，１は、従来例と同
様に、電池容器６の内部に上方から挿入されると共に、
これらの発電要素１，１に接続された集電接続体２，２
に端子４，４と共に予め取り付けていた蓋板５でこの電
池容器６の上端開口部が塞がれ溶接により封止される。
そして、電池容器６の側面に開口された注液口６ａから
内部に電解液が注入される。この際、電解液は、間隙Ｓ
を通って発電要素１の反対側の側面やここに隣接するも
う１個の発電要素１の周囲にも十分に回り込むようにな
り、これらの発電要素１，１の両端面からも均一に電極
１ａ，１ｂ間に電解液が浸透するようになるので、この
電解液の注液工程を迅速化することができるようにな
る。このようにして電解液が注入されると、注液口６ａ
をレーザー溶接等により封口して非水電解質二次電池と
なる。The two power generating elements 1 and 1 are inserted into the battery container 6 from above in the same manner as in the conventional example.
Current collectors 2, 2 connected to these power generating elements 1, 1
The upper end opening of the battery container 6 is closed by a lid plate 5 previously attached together with the terminals 4 and 4, and sealed by welding.
Then, an electrolytic solution is injected into the inside from a liquid inlet 6 a opened on the side surface of the battery container 6. At this time, the electrolytic solution is
Through the power generating element 1 and around the other power generating element 1 adjacent to the power generating element 1, and the electrode 1 a is evenly distributed from both end faces of these power generating elements 1 and 1. , 1b, so that the step of injecting the electrolyte can be accelerated. When the electrolyte is injected in this manner, the injection port 6a
Is sealed by laser welding or the like to obtain a non-aqueous electrolyte secondary battery.
【００１８】上記構成の非水電解質二次電池によれば、
発電要素１，１の側面と集電接続体２，２の本体２ａ，
２ａとの間に間隙Ｓが設けられるので、注液口６ａから
注入された電解液がこの間隙Ｓを通って迅速に拡散する
ことにより、この電解液の注液工程を迅速化することが
できるようになる。According to the non-aqueous electrolyte secondary battery having the above structure,
The side surfaces of the power generating elements 1 and 1 and the main bodies 2a of the current collectors 2 and 2,
Since the gap S is provided between the gap 2a and the electrolyte solution 2a, the electrolyte injected from the injection port 6a quickly diffuses through the gap S, so that the electrolyte injection process can be speeded up. Become like
【００１９】なお、上記実施形態では、注液口６ａが電
池容器６の側面に開口された場合を示したが、この電池
容器６の他の部位に開口されていたり、蓋板５に開口さ
れていても、同様の効果を得ることができる。また、電
池容器６と蓋板５から構成される電池外装体に限らず、
他の任意の構成の電池外装体の任意の部位に注液口が開
口されている場合も同様である。。In the above-described embodiment, the case where the liquid inlet 6a is opened on the side surface of the battery container 6 is shown. However, the liquid inlet 6a is opened on another part of the battery container 6 or opened on the cover plate 5. However, the same effect can be obtained. In addition, the present invention is not limited to the battery outer package composed of the battery container 6 and the cover plate 5,
The same applies to a case where a liquid injection port is opened at an arbitrary portion of a battery exterior body having another arbitrary configuration. .
【００２０】また、上記実施形態では、発電要素１の端
面からはみ出した電極１ａ，１ｂの金属箔を集電接続体
２，２の対となる電極接続部２ｂの間に挟み込んで接続
する場合を示したが、集電接続体の本体が発電要素１の
側面の端部に沿って配置され、この集電接続体の電極接
続部が電極１ａ，１ｂに接続される構成であれば、この
集電接続体の形状や接続手段も特に限定されない。さら
に、金属箔等の電極基体に活物質が塗布されたままでも
集電可能であれば、これら活物質が塗布されたままの電
極１ａ，１ｂに集電接続体をそのまま接続することもで
き、電極基体を用いない電極に集電接続体を接続するこ
ともできる。また、上記実施形態では、２個の発電要素
１，１を有する非水電解質二次電池について示したが、
１個以上の任意個の発電要素１を有する非水電解質二次
電池にも同様に実施可能である。Further, in the above embodiment, the case where the metal foils of the electrodes 1a and 1b protruding from the end face of the power generating element 1 are sandwiched and connected between the electrode connecting portions 2b of the current collecting connectors 2 and 2 as a pair. Although shown, if the configuration is such that the main body of the current collecting connector is arranged along the end of the side surface of the power generating element 1 and the electrode connecting portions of this current collecting connector are connected to the electrodes 1a and 1b, The shape and connection means of the electrical connection body are not particularly limited. Furthermore, if current collection is possible even when the active material is applied to the electrode base such as a metal foil, the current collector can be directly connected to the electrodes 1a and 1b where the active material is applied, A current collector may be connected to an electrode that does not use an electrode substrate. Further, in the above embodiment, the non-aqueous electrolyte secondary battery having the two power generation elements 1 and 1 has been described.
The present invention can be similarly applied to a nonaqueous electrolyte secondary battery having one or more arbitrary power generating elements 1.
【００２１】また、上記実施形態では、正負極の集電接
続体の本体と発電要素との間にそれぞれ間隙を設ける場
合を示したが、いずれか一方の間に間隙があるだけで
も、電解液の注液性を高める効果は生じる。Further, in the above-described embodiment, a case has been described in which a gap is provided between the main body of the positive and negative electrode current collectors and the power generating element. This has the effect of increasing the liquid injectability.
【００２２】また、上記実施形態では、長円筒形巻回型
の発電要素を用いる場合を示したが、円筒形巻回型やそ
の他の任意の形状の巻回型の発電要素にも同様に実施可
能である。さらに、上記実施形態では、非水電解質二次
電池について示したが、他の二次電池や一次電池につい
ても同様に実施可能であり、電池の種類は問わない。Further, in the above-described embodiment, the case where the long cylindrical wound type power generating element is used has been described, but the present invention can be similarly applied to a cylindrical wound type or any other shape of wound type power generating element. It is possible. Further, in the above embodiment, the non-aqueous electrolyte secondary battery has been described. However, other secondary batteries and primary batteries can be similarly implemented, and the type of the battery is not limited.
【００２３】[0023]
【発明の効果】以上の説明から明らかなように、本発明
の電池によれば、発電要素の端面と集電接続体の本体と
の間に間隙があることにより、注液口から注入した電解
液がこの間隙を通って迅速に内部に拡散するので、注液
工程に要する時間を短縮することができるようになる。As is apparent from the above description, according to the battery of the present invention, since there is a gap between the end face of the power generating element and the main body of the current collector, the electrolytic solution injected from the injection port can be obtained. Since the liquid quickly diffuses through the gap, the time required for the liquid pouring step can be reduced.
【図１】本発明の一実施形態を示すものであって、非水
電解質二次電池の発電要素と集電接続体の配置構造を示
す部分縦断面正面図である。FIG. 1, showing an embodiment of the present invention, is a partial longitudinal sectional front view showing an arrangement structure of a power generation element and a current collecting connector of a nonaqueous electrolyte secondary battery.
【図２】非水電解質二次電池の構造を説明するための発
電要素と集電接続体の組み立て斜視図である。FIG. 2 is an assembled perspective view of a power generation element and a current collector for explaining the structure of a non-aqueous electrolyte secondary battery.
【図３】非水電解質二次電池の構造を示す組み立て斜視
図である。FIG. 3 is an assembled perspective view showing a structure of a non-aqueous electrolyte secondary battery.
【図４】従来例を示すものであって、非水電解質二次電
池の発電要素と集電接続体の配置構造を示す部分縦断面
正面図である。FIG. 4 shows a conventional example, and is a partial longitudinal sectional front view showing an arrangement structure of a power generation element and a current collecting connector of a nonaqueous electrolyte secondary battery.
１ 発電要素 １ａ 正極 １ｂ 負極 ２ 集電接続体 ２ａ 本体 ２ｂ 電極接続部 ６ 電池容器 ６ａ 注液口 1 Power generation element 1a Positive electrode 1b Negative electrode 2 Current collector 2a body 2b Electrode connection 6 Battery case 6a Injection port
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴木 勲 京都府京都市南区吉祥院西ノ庄猪之馬場町 １番地 日本電池株式会社内 (72)発明者 下薗 武司 京都府京都市南区吉祥院西ノ庄猪之馬場町 １番地 日本電池株式会社内 Ｆターム(参考） 5H022 AA09 AA18 BB03 CC08 CC12 EE01 5H024 BB14 CC02 CC07 CC12 DD01 DD11 EE01 5H028 AA01 AA07 CC05 CC08 CC12 CC21 EE01 5H029 AJ14 AM01 BJ02 BJ14 DJ02 DJ05 DJ07 EJ01 HJ04 HJ12 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Isao Suzuki Kyoto, Minami-ku, Kyoto No. 1 Inside Japan Battery Co., Ltd. (72) Inventor Takeshi Shimozono Kyoto, Minami-ku, Kyoto No. 1 Inside Japan Battery Co., Ltd. F term (reference) 5H022 AA09 AA18 BB03 CC08 CC12 EE01 5H024 BB14 CC02 CC07 CC12 DD01 DD11 EE01 5H028 AA01 AA07 CC05 CC08 CC12 CC21 EE01 5H029 AJ14 AM01 BJ02 BJ14 DJ02 DJ05 DJ07 EJ01 HJ04 HJ12
Claims (1)
配置した集電接続体の本体から突設した電極接続部を、
この発電要素の端面からはみ出した電極に接続すること
により集電を行う電池において、 発電要素の端部の側面と集電接続体の本体との間に間隙
を設けたことを特徴とする電池。1. An electrode connecting portion projecting from a main body of a current collector connected along a side end portion of a wound power generating element,
A battery for collecting current by connecting to an electrode protruding from an end face of the power generating element, wherein a gap is provided between a side surface of an end of the power generating element and a main body of the current collecting connector.
Priority Applications (1)
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| JP2002153788A JP4096162B2 (en) | 2002-05-28 | 2002-05-28 | battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002153788A JP4096162B2 (en) | 2002-05-28 | 2002-05-28 | battery |
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| JP2003346882A true JP2003346882A (en) | 2003-12-05 |
| JP2003346882A5 JP2003346882A5 (en) | 2005-09-29 |
| JP4096162B2 JP4096162B2 (en) | 2008-06-04 |
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ID=29770743
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| JP2002153788A Expired - Fee Related JP4096162B2 (en) | 2002-05-28 | 2002-05-28 | battery |
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