JP2001035474A - Electric energy storage device and its manufacture - Google Patents
Electric energy storage device and its manufactureInfo
- Publication number
- JP2001035474A JP2001035474A JP11212375A JP21237599A JP2001035474A JP 2001035474 A JP2001035474 A JP 2001035474A JP 11212375 A JP11212375 A JP 11212375A JP 21237599 A JP21237599 A JP 21237599A JP 2001035474 A JP2001035474 A JP 2001035474A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- electrode body
- storage device
- energy storage
- current collecting
- 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
-
- 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)
- Connection Of Batteries Or Terminals (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ガソリン自動車の
イグナイタ用の電源、ハイブリッド自動車や電気自動車
の回生制動エネルギーを蓄電するための蓄電器等として
用いられる、電気二重層コンデンサー、リチウムイオン
二次電池などの電気エネルギー蓄積デバイスの構造、並
びに製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric double layer capacitor, a lithium ion secondary battery and the like which are used as a power source for an igniter of a gasoline vehicle, a storage device for storing regenerative braking energy of a hybrid vehicle or an electric vehicle, and the like. And a method of manufacturing the electric energy storage device.
【０００２】[0002]
【従来の技術】従来のリチウムイオン二次電池は、例え
ば図１０に示す様に、負極缶(10)の内部に巻き取り電極
体(２)を収容し、負極缶(10)の開口部に封口板(11)を固
定したものであって、負極缶(10)と封口板(11)の間には
絶縁部材(12)が介在している。又、封口板(11)には、安
全弁(14)を内蔵した正極端子(13)が取り付けられてい
る。これによって、巻き取り電極体(２)が発生する電力
を正極端子(13)と負極缶(10)から外部へ取り出すことが
出来る。2. Description of the Related Art As shown in FIG. 10, for example, a conventional lithium ion secondary battery has a wound electrode body (2) housed inside a negative electrode can (10), and is inserted into an opening of the negative electrode can (10). The sealing plate (11) is fixed, and an insulating member (12) is interposed between the negative electrode can (10) and the sealing plate (11). Further, a positive electrode terminal (13) having a built-in safety valve (14) is attached to the sealing plate (11). Thereby, the electric power generated by the winding electrode body (2) can be taken out from the positive electrode terminal (13) and the negative electrode can (10) to the outside.
【０００３】巻き取り電極体(２)は、図１１に示す如
く、それぞれ帯状の正極(21)、セパレータ(22)、及び負
極(23)から構成される。正極(21)は、アルミニウム箔か
らなる芯体の表面に正極活物質(24)を塗布して構成さ
れ、負極(23)は、銅箔からなる芯体の表面に負極活物質
(26)を塗布して構成されている。正極(21)及び負極(23)
はそれぞれセパレータ(22)上に幅方向へずらして重ね合
わされて、渦巻き状に巻き取られている。これによっ
て、巻き取り電極体(２)の巻き軸方向の両端部の内、一
方の端部では、セパレータ(22)の端縁よりも外方へ正極
(21)の端縁が突出すると共に、他方の端部では、セパレ
ータ(22)の端縁よりも外方へ負極(23)の端縁が突出して
いる。As shown in FIG. 11, the wound electrode body (2) comprises a strip-shaped positive electrode (21), a separator (22), and a negative electrode (23). The positive electrode (21) is formed by applying a positive electrode active material (24) to the surface of a core made of aluminum foil, and the negative electrode (23) is formed by coating the negative electrode active material on the surface of a core made of copper foil.
(26) is applied. Positive electrode (21) and negative electrode (23)
Are respectively superposed on the separator (22) so as to be shifted in the width direction, and are spirally wound. As a result, at one end of the two ends in the winding axis direction of the winding electrode body (2), the positive electrode is located outward of the edge of the separator (22).
The edge of (21) protrudes, and at the other end, the edge of the negative electrode (23) protrudes outward from the edge of the separator (22).
【０００４】又図１０に示す如く、巻き取り電極体(２)
の両端部には、それぞれ集電部材(３)が設置されてい
る。集電部材(３)は、巻き取り電極体(２)の端面に接合
された平板部(33)と、該平板部(33)の表面に突設された
タブ部(32)とを具え、正極側の集電部材(３)のタブ部(3
2)の先端部が、封口板(11)の内面に溶接され、負極側の
集電部材(３)のタブ部(32)の先端部が、負極缶(１)の底
面に溶接されている。[0006] As shown in FIG. 10, a wound electrode body (2)
Current collecting members (3) are installed at both ends of the. The current collecting member (3) includes a flat plate portion (33) joined to an end surface of the winding electrode body (2), and a tab portion (32) protruding from a surface of the flat plate portion (33), Tab part (3) of current collector (3) on the positive electrode side
The tip of (2) is welded to the inner surface of the sealing plate (11), and the tip of the tab (32) of the current collector (3) on the negative electrode side is welded to the bottom of the negative electrode can (1). .
【０００５】[0005]
【発明が解決しようとする課題】ところで、リチウムイ
オン二次電池において、大電流での充放電を可能とする
ためには、巻き取り電極体(２)から正極端子部及び負極
端子部へ至る電流経路の電気抵抗を出来るだけ低減させ
て、集電効率を上げる必要がある。しかしながら、図１
０に示す従来のリチウムイオン二次電池においては、巻
き取り電極体(２)の端縁を集電部材(３)の平板部(33)に
当接させた構造となっているため、巻き取り電極体(２)
と集電部材(３)の間の接触面積が小さく、これによって
接触抵抗が大きくなり、集電効率が低下する問題があっ
た。By the way, in a lithium ion secondary battery, in order to enable charging and discharging with a large current, a current from the winding electrode body (2) to the positive terminal and the negative terminal is required. It is necessary to reduce the electric resistance of the path as much as possible to increase the current collection efficiency. However, FIG.
In the conventional lithium ion secondary battery shown in FIG. 0, since the edge of the winding electrode body (2) is in contact with the flat plate portion (33) of the current collecting member (3), the winding is performed. Electrode body (2)
There is a problem that the contact area between the contact member and the current collecting member (3) is small, thereby increasing the contact resistance and decreasing the current collecting efficiency.
【０００６】そこで出願人は、図９に示す如く巻き取り
電極体(２)の電極端縁に、複数のコイル部材(６)と、各
コイル部材(６)の中央孔を貫通するＬ字状の棒材(62)と
を設置して、各コイル部材(６)を棒材(62)と共に電極端
縁にレーザ溶接する集電構造を開発した。該集電構造に
よれば、巻き取り電極体(２)の電極端縁とコイル部材
(６)とが深く噛合して、該噛合部に対してレーザ溶接が
施されるので、正極や負極を構成する帯状芯体が薄いも
のであっても、巻き取り電極体(２)の電極端縁とコイル
部材(６)とは互いに噛合した状態で融着する。従って、
電極の帯状芯体が溶融によって破れることはない。又、
溶接部から伸びる各棒材(62)の先端部(62a)は、図示の
如く互いに束ねて、正極端子部や負極端子部との連結に
利用することが出来る。[0006] Therefore, as shown in FIG. 9, the applicant assigns a plurality of coil members (6) to an electrode edge of the wound electrode body (2) and an L-shape penetrating a central hole of each coil member (6) A current collecting structure was developed in which each of the coil members (6) and the rod (62) were laser-welded to the edge of the electrode. According to the current collecting structure, the electrode edge of the wound electrode body (2) and the coil member
(6) are deeply meshed with each other, and laser welding is performed on the meshed portion. Therefore, even if the strip-shaped cores constituting the positive electrode and the negative electrode are thin, the electrode of the winding electrode (2) can be used. The extreme edge and the coil member (6) are fused while being engaged with each other. Therefore,
The strip-shaped core of the electrode is not broken by melting. or,
The tips (62a) of the rods (62) extending from the welded portions can be bundled together as shown in the figure and used for connection to the positive electrode terminal and the negative electrode terminal.
【０００７】しかしながら、図９に示す集電構造におい
ては、従来よりも集電効率は向上するが、巻き取り電極
体(２)から伸びる複数本の棒材(62)の先端部(62a)を正
極端子部や負極端子部に連結することが困難であり、連
結構造の簡易化が課題として残されていた。However, in the current collecting structure shown in FIG. 9, although the current collecting efficiency is improved as compared with the conventional one, the distal end portions (62a) of the plurality of rods (62) extending from the winding electrode body (2) are removed. It is difficult to connect to the positive electrode terminal portion and the negative electrode terminal portion, and simplification of the connection structure has been left as an issue.
【０００８】本発明の目的は、リチウムイオン二次電池
などの電気エネルギー蓄積デバイスにおいて、従来より
も集電効率を改善すると同時に、連結構造の簡易化を図
ることである。An object of the present invention is to improve the current collection efficiency and to simplify the connection structure in an electric energy storage device such as a lithium-ion secondary battery.
【０００９】[0009]
【課題を解決する為の手段】本発明に係る電気エネルギ
ー蓄積デバイスにおいては、密閉容器内に、それぞれ帯
状の正極(21)と負極(23)の間にセパレータ(22)を介在さ
せてなる巻き取り電極体(２)が収容され、該巻き取り電
極体(２)が発生する電力を、密閉容器に設けた正極端子
部及び負極端子部から外部へ取り出すことが可能であ
る。ここで、巻き取り電極体(２)の巻き軸方向の両端部
の内、少なくとも一方の端部には、正極(21)又は負極(2
3)の端縁が突出すると共に、該電極端縁と接合されて巻
き取り電極体(２)の中央部から外周部まで放射状に伸び
る複数の集電部(５)と、巻き取り電極体(２)の中央孔(2
8)に嵌まる導電性リング部材(７)とを具え、前記複数の
集電部(５)の基端部がリング部材(７)に接続され、リン
グ部材(７)が前記正極端子部又は負極端子部に連結され
ている。In the electric energy storage device according to the present invention, a winding formed by interposing a separator (22) between a strip-shaped positive electrode (21) and a strip-shaped negative electrode (23) in an airtight container. The take-up electrode body (2) is housed therein, and the electric power generated by the take-up electrode body (2) can be taken out from the positive terminal section and the negative terminal section provided in the closed container. Here, a positive electrode (21) or a negative electrode (2) is provided on at least one end of both ends in the winding axis direction of the winding electrode body (2).
3) a plurality of current collectors (5) projecting from the center of the winding electrode body (2) and extending radially from the center of the winding electrode body (2) while projecting from the electrode edge; 2) Central hole (2
8) a conductive ring member (7) fitted to the base member, the base ends of the plurality of current collectors (5) are connected to the ring member (7), and the ring member (7) is connected to the positive terminal portion or It is connected to the negative electrode terminal.
【００１０】上記本発明の電気エネルギー蓄積デバイス
においては、巻き取り電極体(２)の端部に突出する渦巻
き状の電極端縁に対し、複数の集電部(５)が広い接触面
積で接合されて、巻き取り電極体(２)の内周部から外周
部に跨って半径方向に伸びているので、これら複数の集
電部(５)によって、巻き取り電極体(２)の全領域から効
率良く電流が集められる。そして、複数の集電部(５)に
よって集められた電流は、全てリング部材(７)に流れ込
み、該リング部材(７)を経て、正極端子部又は負極端子
部に導かれる。ここで、リング部材(７)を正極端子部又
は負極端子部に連結する構造としては、例えば、リング
部材(７)の中央孔に内ねじを形成して、該内ねじにねじ
部材を螺合せしめ、正極端子部又は負極端子部との連結
に用いる帯状の連結部材(タブ)の基端部を、リング部材
(７)とねじ部材の間に固定する構造を採用することが出
来る。In the electric energy storage device of the present invention, a plurality of current collectors (5) are joined to a spiral electrode edge projecting from the end of the winding electrode body (2) with a wide contact area. Since it extends in the radial direction from the inner peripheral portion to the outer peripheral portion of the winding electrode body (2), the plurality of current collectors (5) can be used to cover the entire area of the winding electrode body (2). The current is collected efficiently. Then, all the currents collected by the plurality of current collectors (5) flow into the ring member (7), and are guided to the positive electrode terminal portion or the negative electrode terminal portion via the ring member (7). Here, as a structure for connecting the ring member (7) to the positive electrode terminal portion or the negative electrode terminal portion, for example, an internal screw is formed in a central hole of the ring member (7), and a screw member is screwed to the internal screw. At least, the base end of the band-shaped connecting member (tab) used for connection with the positive terminal portion or the negative terminal portion is connected to a ring member.
It is possible to adopt a structure of fixing between (7) and the screw member.
【００１１】具体的構成において、集電部(５)は、巻き
取り電極体(２)の電極端縁に噛合する複数の凹部を有す
る集電部材によって形成される。これによって、集電部
(５)と電極端縁との間に大きな接触面積が確保され、両
者間の電気抵抗を低減させることが出来る。In a specific configuration, the current collecting portion (5) is formed by a current collecting member having a plurality of concave portions meshing with the electrode edge of the wound electrode body (2). This allows the current collector
A large contact area is secured between (5) and the electrode edge, and the electrical resistance between them can be reduced.
【００１２】又、前記集電部材は、巻き取り電極体(２)
の電極端縁に熱融着させることが可能である。この場
合、集電部材と電極端縁とは互いに噛合した状態で熱融
着するので、確実な接合が実現される。The current collecting member may be a wound electrode body (2).
Can be thermally fused to the edge of the electrode. In this case, since the current collecting member and the electrode edge are heat-fused in a state where they are meshed with each other, reliable joining is realized.
【００１３】集電部材は、線材をコイル状に成形してな
るコイル部材(６)と、該コイル部材(６)の中央部を貫通
する棒材(61)とから構成することが出来る。該構成によ
れば、集電部材を電極端縁に熱融着させる方法としてレ
ーザ溶接を採用する場合において、レーザのパワーを大
きく設定したとしても、陥没のない集電部(５)を形成す
ることが出来る。The current collecting member can be constituted by a coil member (6) formed by forming a wire into a coil shape, and a bar (61) penetrating through the center of the coil member (6). According to this configuration, when laser welding is employed as a method for thermally fusing the current collecting member to the edge of the electrode, the current collecting portion (5) without depression is formed even when the laser power is set to be large. I can do it.
【００１４】更に具体的には、リング部材(７)に開設し
た貫通孔(76)に、棒材(61)の端部を貫通せしめて、リン
グ部材(７)と棒材(61)の端部とを互いに溶接する。これ
によって、集電部(５)とリング部材(７)に跨る溶接部が
形成されて、両者間の電気的接続が確実なものとなる。More specifically, an end of the bar (61) is passed through a through hole (76) opened in the ring member (7) so that the end of the ring member (7) and the end of the bar (61) are formed. Parts are welded together. As a result, a welded portion is formed over the current collector (5) and the ring member (7), and the electrical connection between the two is ensured.
【００１５】又、集電部材は、板材を屏風折りしてなる
屏風状部材(63)によって構成することも可能である。こ
れによって、集電部材と電極とが面接触し、広い接触面
積を得ることが出来る。Further, the current collecting member may be constituted by a folding screen-shaped member (63) obtained by folding a plate material into a folding screen. Thereby, the current collecting member and the electrode are in surface contact, and a large contact area can be obtained.
【００１６】又、他の具体的構成において、巻き取り電
極体(２)の外周面には、巻き取り電極体(２)を周囲から
挟圧して、集電部材を軸方向に圧縮するための締め付け
部材(９)が取り付けられている。該具体的構成によれ
ば、集電部材として、コイル部材(６)や屏風状部材(63)
を採用した場合、締め付け部材(９)による挟圧によっ
て、集電部材が電極端縁と噛合した状態で圧縮され、集
電部材と電極端縁とが互いに圧着することになる。従っ
て、集電部材の溶接は不要である。In another specific configuration, the winding electrode body (2) is pressed on the outer peripheral surface of the winding electrode body (2) from the periphery to compress the current collecting member in the axial direction. A fastening member (9) is attached. According to the specific configuration, as the current collecting member, the coil member (6) or the folding screen member (63)
Is adopted, the current collecting member is compressed in a state in which the current collecting member is engaged with the electrode edge by the clamping pressure of the fastening member (9), and the current collecting member and the electrode edge are pressed against each other. Therefore, welding of the current collecting member is unnecessary.
【００１７】本発明に係る電気エネルギー蓄積デバイス
の製造方法は、巻き取り電極体(２)を構成すべき正極(2
1)、負極(23)及びセパレータ(22)を作製する第１工程
と、少なくとも一方の端部に正極(21)又は負極(23)の端
縁が突出する様に、セパレータ(22)を間に挟んで正極(2
1)と負極(23)とを重ね合わせ、これらを渦巻き状に巻き
取ることによって、巻き取り電極体(２)を作製する第２
工程と、正極(21)又は負極(23)の端縁が突出した巻き取
り電極体(２)の端部に、電極端縁に噛合可能な複数の凹
部を有する複数の集電部材を放射状に設置して、各集電
部材の凹部を電極端縁に噛合せしめると共に、該巻き取
り電極体(２)の端部に開口する中央孔(28)には、導電性
リング部材(７)を嵌合せしめる第３工程と、前記複数の
集電部材を電極端縁及びリング部材(７)にレーザ溶接し
て、巻き取り電極体(２)の中央部から外周部まで伸びる
複数の集電部(５)を形成すると共に、各集電部(５)の基
端部をリング部材(７)に接続する第４工程と、リング部
材(７)を正極端子部又は負極端子部に連結する第５工程
とを有している。The method of manufacturing an electric energy storage device according to the present invention comprises the steps of:
1), the first step of producing the negative electrode (23) and the separator (22), and the separator (22) interposed therebetween so that the edge of the positive electrode (21) or the negative electrode (23) protrudes from at least one end. Between the positive electrode (2
The second step is to form a wound electrode body (2) by superimposing the negative electrode (1) and the negative electrode (23) and winding them in a spiral.
A plurality of current collecting members having a plurality of concave portions which can be engaged with the electrode edges at the end of the wound electrode body (2) from which the edges of the positive electrode (21) or the negative electrode (23) project radially; It is installed so that the concave portion of each current collecting member is engaged with the edge of the electrode, and a conductive ring member (7) is fitted into a central hole (28) opened at the end of the wound electrode body (2). A third step of joining, and a plurality of current collectors extending from the center to the outer periphery of the winding electrode body (2) by laser welding the plurality of current collectors to the electrode edge and the ring member (7). 5) forming a fourth step of connecting the base end of each current collector (5) to the ring member (7), and a fifth step of connecting the ring member (7) to the positive terminal or the negative terminal. And a process.
【００１８】上記本発明の電気エネルギー蓄積デバイス
の製造方法においては、巻き取り電極体(２)の少なくと
も一方の端部に、電極端縁に噛合すべき複数の凹部を有
する集電部材を設置し、該集電部材を電極端縁に溶接す
るので、正極や負極を構成する帯状芯体が薄いものであ
っても、集電部材と電極端縁とは互いに噛み合った状態
で融着し、帯状芯体が溶融によって破れる等の溶接不良
は発生しない。この結果、巻き取り電極体(２)の端部に
は、正極又は負極と一体の集電部(５)が形成され、該集
電部(５)の基端部がリング部材(７)と接合されることに
なる。その後、巻き取り電極体(２)の端部に取り付けら
れたリング部材(７)が、例えば帯状の連結部材を介し
て、密閉容器に設けられた正極端子部又は負極端子部に
連結される。In the method for manufacturing an electric energy storage device according to the present invention, a current collecting member having a plurality of concave portions to be engaged with the electrode edge is provided at at least one end of the wound electrode body (2). Since the current collecting member is welded to the edge of the electrode, the current collecting member and the electrode edge are fused with each other even when the band-shaped cores constituting the positive electrode and the negative electrode are thin, so that the band shape is formed. Welding defects such as the core being broken by melting do not occur. As a result, a current collector (5) integral with the positive electrode or the negative electrode is formed at the end of the wound electrode body (2), and the base end of the current collector (5) is connected to the ring member (7). Will be joined. Then, the ring member (7) attached to the end of the winding electrode body (2) is connected to a positive electrode terminal portion or a negative electrode terminal portion provided in a closed container via, for example, a band-like connecting member.
【００１９】[0019]
【発明の効果】本発明に係る電気エネルギー蓄積デバイ
スにおいては、巻き取り電極体(２)と集電部(５)の間の
接触面積が大きく、これによって接触抵抗が小さくな
り、集電効率が向上する。又、巻き取り電極体(２)に取
り付けられたリング部材(７)を正極端子部又は負極端子
部との連結に用いることが出来るので、連結構造は簡易
なものとなる。In the electric energy storage device according to the present invention, the contact area between the winding electrode body (2) and the current collector (5) is large, thereby reducing the contact resistance and improving the current collection efficiency. improves. Further, since the ring member (7) attached to the winding electrode body (2) can be used for connection with the positive electrode terminal portion or the negative electrode terminal portion, the connection structure is simplified.
【００２０】[0020]
【発明の実施の形態】以下、本発明をリチウムイオン二
次電池に実施した形態につき、図面に沿って具体的に説
明する。第１実施例 本実施例のリチウムイオン二次電池は、図１に示す如
く、筒体(15)の両端開口部に蓋体(16)(16)を固定してな
る密閉容器の内部に、巻き取り電極体(２)を収容すると
共に、両蓋体(16)(16)にそれぞれ正極端子機構(４)及び
負極端子機構(40)を取り付けて、巻き取り電極体(２)の
両端部をそれぞれ正極端子機構(４)及び負極端子機構(4
0)に連結して構成されている。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to a lithium ion secondary battery.
Next, the embodiment of the battery is explained in detail with reference to the drawings.
I will tell.First embodiment The lithium ion secondary battery of the present embodiment is as shown in FIG.
The lids (16) and (16) are fixed to the openings at both ends of the cylindrical body (15).
When the wound electrode body (2) is housed inside a sealed container
In both cases, the positive electrode terminal mechanisms (4) and (4)
Attach the negative electrode terminal mechanism (40) and take out the winding electrode body (2).
Connect both ends to the positive terminal mechanism (4) and the negative terminal mechanism (4
0).
【００２１】巻き取り電極体(２)は、図１１に示す様
に、それぞれ帯状の正極(21)、セパレータ(22)及び負極
(23)からなり、正極(21)及び負極(23)はそれぞれセパレ
ータ(22)上に幅方向へずらして重ね合わされ、渦巻き状
に巻き取られている。正極(21)は、アルミニウム箔から
なる芯体の表面に正極活物質(24)を塗布して構成され、
電極長手方向に伸びる一方の端縁に沿って、正極活物質
の塗布されていない非塗工部(25)が形成されている。
又、負極(23)は、銅箔からなる芯体の表面に負極活物質
(26)を塗布して構成され、電極長手方向に伸びる他方の
端縁に沿って、負極活物質の塗布されていない非塗工部
(27)が形成されている。As shown in FIG. 11, the wound electrode body (2) comprises a strip-shaped positive electrode (21), a separator (22) and a negative electrode.
The positive electrode (21) and the negative electrode (23) are superposed on the separator (22) so as to be shifted in the width direction, and are wound in a spiral. The positive electrode (21) is configured by applying a positive electrode active material (24) to the surface of a core made of aluminum foil,
An uncoated portion (25) on which the positive electrode active material is not applied is formed along one edge extending in the electrode longitudinal direction.
The negative electrode (23) has a negative electrode active material on the surface of a core made of copper foil.
(26) is applied, and along the other edge extending in the electrode longitudinal direction, the non-coated portion where the negative electrode active material is not applied
(27) is formed.
【００２２】これによって、巻き取り電極体(２)の軸方
向の両端部の内、一方の端部では、渦巻き状に巻き取ら
れた正極(21)の端縁(非塗工部(25))が、セパレータ(22)
の端縁よりも外方へ突出すると共に、他方の端部では、
渦巻き状で巻き取られた負極(23)の端縁(非塗工部(27))
が、セパレータ(22)の端縁よりも外方へ突出することに
なる。例えば、各電極の活物質塗工部(24)(26)の幅Ａは
数十ｍｍ、非塗工部(25)(27)の幅Ｂは数ｍｍ、セパレー
タ(22)からの突出距離Ｓは１〜３ｍｍ程度に形成するこ
とが出来る。As a result, at one end of both ends in the axial direction of the winding electrode body (2), the edge of the spirally wound positive electrode (21) (the uncoated part (25) ) Is the separator (22)
Projecting beyond the edge of, and at the other end,
Edge of spirally wound negative electrode (23) (uncoated part (27))
Will protrude outward from the edge of the separator (22). For example, the width A of the active material coated portions (24) and (26) of each electrode is several tens of mm, the width B of the non-coated portions (25) and (27) is several mm, and the protruding distance S from the separator (22). Can be formed to about 1 to 3 mm.
【００２３】図１に示す如く、巻き取り電極体(２)の両
端部にはそれぞれ、後述の集電部材を溶接してなる複数
の集電部(５)が形成されている。正極端子機構(４)側の
複数の集電部(５)は、巻き取り電極体(２)の正極(21)の
端縁と接合されて、巻き取り電極体(２)の中央部から外
周部まで放射状に伸びている。又、負極端子機構(40)側
の複数の集電部(５)は、巻き取り電極体(２)の負極(23)
の端縁と接合されて、巻き取り電極体(２)の中央部から
外周部まで放射状に伸びている。As shown in FIG. 1, a plurality of current collectors (5) formed by welding current collectors to be described later are formed at both ends of the wound electrode body (2). The plurality of current collectors (5) on the side of the positive electrode terminal mechanism (4) are joined to the edge of the positive electrode (21) of the winding electrode body (2), and from the center of the winding electrode body (2) to the outer periphery. It extends radially to the part. The plurality of current collectors (5) on the side of the negative electrode terminal mechanism (40) are connected to the negative electrode (23) of the wound electrode body (2).
And extends radially from the center to the outer periphery of the wound electrode body (2).
【００２４】又、巻き取り電極体(２)の中央孔(28)の両
端部にはそれぞれ、導電性リング部材(７)が嵌まってお
り、前記複数の集電部(５)の基端部がリング部材(７)の
外周部に接続されている。リング部材(７)の中央孔には
内ねじ(73)が形成されており、該内ねじ(73)に対し、電
極側端子部材(71)に下向きに突設されたねじ軸(72)が螺
合している。In addition, conductive ring members (7) are fitted into both ends of the central hole (28) of the winding electrode body (2), respectively. The portion is connected to the outer peripheral portion of the ring member (7). An inner screw (73) is formed in the center hole of the ring member (7), and a screw shaft (72) projecting downward from the electrode-side terminal member (71) is formed with respect to the inner screw (73). It is screwed.
【００２５】正極端子機構(４)は、蓋体(16)を貫通して
配備された外側端子部材(41)と、電池缶(１)の内部に配
備された内側端子部材(43)と、両端子部材(41)(43)の間
に介在するワッシャ部材(44)とを具え、内側端子部材(4
3)に上向きに突設されたねじ軸(49)が、ワッシャ部材(4
4)を貫通して、外側端子部材(41)に螺合している。外側
端子部材(41)の周囲には第１絶縁部材(45)及び第２絶縁
部材(46)が装着されて、蓋体(16)と外側端子部材(41)の
間の電気的絶縁と気密性が保たれている。又、外側端子
部材(41)に上向きに突設されたねじ軸(42)には、ワッシ
ャ(47)が嵌まると共に、ナット(48)が螺合している。The positive terminal mechanism (4) includes an outer terminal member (41) provided through the lid (16), an inner terminal member (43) provided inside the battery can (1), A washer member (44) interposed between the two terminal members (41) and (43), and the inner terminal member (4
The screw shaft (49) projecting upward from (3) is attached to the washer member (4).
4) and is screwed to the outer terminal member (41). A first insulating member (45) and a second insulating member (46) are mounted around the outer terminal member (41) to provide electrical insulation and airtightness between the lid (16) and the outer terminal member (41). Sex is maintained. A washer (47) is fitted to a screw shaft (42) projecting upward from the outer terminal member (41), and a nut (48) is screwed into the screw shaft (42).
【００２６】そして、巻き取り電極体(２)に取り付けら
れたリング部材(７)と電極側端子部材(71)の間に、帯状
の連結部材(74)の基端部が挟持されると共に、正極端子
機構(４)の内側端子部材(43)とワッシャ部材(44)の間
に、該連結部材(74)の先端部が挟持されて、リング部材
(７)と正極端子機構(４)の間の連結機構を構成してい
る。負極端子機構(40)も同じ構造であって、正極端子機
構(４)と負極端子機構(40)から、巻き取り電極体(２)の
発生電力を取り出すことが出来る。The base end of the band-like connecting member (74) is sandwiched between the ring member (7) attached to the winding electrode body (2) and the electrode-side terminal member (71). The distal end of the connecting member (74) is sandwiched between the inner terminal member (43) of the positive electrode terminal mechanism (4) and the washer member (44) to form a ring member.
A connection mechanism between (7) and the positive electrode terminal mechanism (4) is configured. The negative electrode terminal mechanism (40) has the same structure, and the electric power generated by the winding electrode body (2) can be extracted from the positive electrode terminal mechanism (4) and the negative electrode terminal mechanism (40).
【００２７】尚、正極端子機構(４)側のリング部材(７)
はアルミニウム製であり、負極端子機構(40)側のリング
部材(７)は銅製若しくはニッケル製である。これによっ
て、巻き取り電極体(２)とリング部材(７)の間の起電力
の発生を防止することが出来る。The ring member (7) on the positive electrode terminal mechanism (4) side
Is made of aluminum, and the ring member (7) on the side of the negative electrode terminal mechanism (40) is made of copper or nickel. This can prevent the generation of electromotive force between the winding electrode body (2) and the ring member (7).
【００２８】上記リチウムイオン二次電池においては、
巻き取り電極体(２)の両端部にそれぞれ、電極端縁と一
体に複数の集電部(５)が形成され、これらの集電部(５)
の基端部がリング部材(７)に接続されているので、巻き
取り電極体(２)から発生する電流がリング部材(７)に効
率良く集められて、高い集電効率が得られる。In the above lithium ion secondary battery,
A plurality of current collectors (5) are formed at both ends of the wound electrode body (2), respectively, integrally with the electrode edges, and these current collectors (5) are formed.
Is connected to the ring member (7), the current generated from the winding electrode body (2) is efficiently collected by the ring member (7), and high current collection efficiency is obtained.
【００２９】次に、本実施例のリチウムイオン二次電池
の製造方法について説明する。図２及び図３は前記集電
部(５)の形成方法を示している。従来と同様に巻き取り
電極体(２)を作製した後、巻き取り電極体(２)の各端部
に、コイル部材(６)の中央孔に棒材(61)を貫通せしめて
なる複数の集電部材を放射状に配置し、各コイル部材
(６)を電極端縁と噛合せしめると共に、コイル部材(６)
及び棒材(61)の基端をリング部材(７)に当接せしめる。
尚、正極(21)の端縁(非塗工部(25))に噛合させる集電部
材はアルミニウム製、負極(23)の端縁(非塗工部(27))に
噛合せしめる集電部材は銅製である。Next, a method of manufacturing the lithium ion secondary battery of this embodiment will be described. FIGS. 2 and 3 show a method of forming the current collector (5). After producing the wound electrode body (2) in the same manner as in the prior art, a plurality of rods (61) are passed through the center hole of the coil member (6) at each end of the wound electrode body (2). The current collectors are arranged radially, and each coil
(6) is engaged with the electrode edge, and the coil member (6)
Then, the base end of the bar (61) is brought into contact with the ring member (7).
The current collecting member engaged with the edge of the positive electrode (21) (uncoated portion (25)) is made of aluminum, and the current collecting member engaged with the edge of the negative electrode (23) (uncoated portion (27)). Is made of copper.
【００３０】次に、各集電部材、並びに各集電部材とリ
ング部材(７)との当接部に対して、ＹＡＧレーザ等を用
いたレーザ溶接を施す。これによって、コイル部材(６)
及び棒材(61)の略全体が溶融して、図１に示す如く各電
極と一体に繋がった複数の集電部(５)が放射状に形成さ
れると共に、各集電部(５)の基端部がリング部材(７)に
融着することになる。この際、コイル部材(６)は電極端
縁と深く噛合した状態で電極端縁に融着されるので、正
極や負極を構成する芯体が薄いものであっても、芯体が
溶融によって破れる等の溶接不良は発生しない。Next, laser welding using a YAG laser or the like is performed on each of the current collecting members and the contact portion between each of the current collecting members and the ring member (7). Thereby, the coil member (6)
As shown in FIG. 1, a plurality of current collectors (5) integrally connected to each electrode are radially formed, and a plurality of current collectors (5) are formed radially. The base end will be fused to the ring member (7). At this time, since the coil member (6) is fused to the electrode edge while being deeply engaged with the electrode edge, even if the core body constituting the positive electrode or the negative electrode is thin, the core body is broken by melting. No welding failure such as occurs.
【００３１】リチウムイオン二次電池の組立工程におい
ては、巻き取り電極体(２)の両端部に取り付けられた各
リング部材(７)に電極側端子部材(71)を螺合せしめて、
連結部材(74)の基端部を挟持する。又、電池缶(１)を構
成する両蓋体(16)にはそれぞれ、正極端子機構(４)及び
負極端子機構(40)を組み付け、両リング部材(７)(７)か
ら伸びる連結部材(74)の先端部をワッシャ部材(44)と内
側端子部材(43)の間に挟持する。そして、筒体(15)の内
部に巻き取り電極体(２)を収容した後、両蓋体(16)(16)
を筒体(15)に溶接する。その後、電解液注入口(図示省
略)から電池缶(１)の内部に電解液を注入した後、電解
液注入口を塞ぐ。この結果、図１に示すリチウムイオン
二次電池が完成する。In the step of assembling the lithium ion secondary battery, the electrode side terminal member (71) is screwed to each ring member (7) attached to both ends of the winding electrode body (2),
The base end of the connecting member (74) is sandwiched. A positive electrode terminal mechanism (4) and a negative electrode terminal mechanism (40) are respectively assembled to both lids (16) constituting the battery can (1), and a connecting member (7) extending from both ring members (7) (7). The tip of (74) is sandwiched between the washer member (44) and the inner terminal member (43). Then, after the winding electrode body (2) is accommodated inside the cylindrical body (15), the both lid bodies (16) and (16)
Is welded to the cylinder (15). Then, after the electrolyte is injected into the battery can (1) from an electrolyte injection port (not shown), the electrolyte injection port is closed. As a result, the lithium ion secondary battery shown in FIG. 1 is completed.
【００３２】第２実施例 図４及び図５は、巻き取り電極体(２)の中央部に、樹脂
製(例えばポリブチレンテレフタレート製)の円筒状巻芯
(29)が配備されているリチウムイオン二次電池を対象と
して、本発明を実施した例を示しており、集電部材とし
ては、第１実施例と同様のコイル部材(６)及び棒材(61)
が採用されている。巻き取り電極体(２)の巻芯(29)の両
端部はそれぞれ六角孔に加工され、該六角孔に対して、
六角ナットからなるリング部材(７)が係合している。
又、巻芯(29)及びリング部材(７)の複数箇所には、図５
に示す如く貫通孔(29a)(76)が半径方向に開設されて、
集電部材を構成する棒材(61)の基端部が該貫通孔(29a)
(76)を貫通している。[0032]Second embodiment FIG. 4 and FIG. 5 show that the central part of the wound electrode body (2)
(For example, made of polybutylene terephthalate)
For lithium-ion secondary batteries equipped with (29)
Thus, an example in which the present invention is implemented is shown, and as a current collecting member,
The same coil member (6) and rod (61) as in the first embodiment.
Has been adopted. Both of the winding core (29) of the winding electrode body (2)
Each end is machined into a hexagonal hole, and for the hexagonal hole,
A ring member (7) consisting of a hexagon nut is engaged.
In addition, FIG. 5 shows a plurality of locations of the core (29) and the ring member (7).
As shown in the through holes (29a) (76) are opened in the radial direction,
The base end of the rod (61) constituting the current collecting member is the through-hole (29a).
(76).
【００３３】本実施例においては、集電部材を構成する
コイル部材(６)の全長領域、並びにリング部材(７)を貫
通する棒材(61)の基端部領域に亘って、レーザ溶接が施
される。これによって、巻き取り電極体(２)の電極端縁
と噛合するコイル部材(６)及び棒材(61)は第１実施例と
同様に略全体が溶融して、各電極と一体に繋がった複数
の集電部(５)が放射状に形成される。又、リング部材
(７)を貫通する棒材(61)の基端部及びリング部材(７)の
一部が溶融して、各集電部(５)の基端部がリング部材
(７)に接続されることになる。その他の組立工程は第１
実施例と同様である。In this embodiment, laser welding is performed over the entire length region of the coil member (6) constituting the current collecting member and the base end region of the rod (61) penetrating the ring member (7). Will be applied. As a result, the coil member (6) and the rod (61) meshing with the electrode edge of the winding electrode body (2) were substantially entirely melted as in the first embodiment, and connected integrally with each electrode. A plurality of current collectors (5) are formed radially. Also, a ring member
The base end of the bar (61) penetrating through (7) and a part of the ring member (7) are melted, and the base end of each current collector (5) becomes a ring member.
It will be connected to (7). Other assembly processes are first
This is the same as the embodiment.
【００３４】本実施例によれば、集電部材を構成する棒
材(61)の基端部がリング部材(７)を貫通した状態でリン
グ部材(７)に溶接されるので、集電部(５)とリング部材
(７)の間の電気的接続を確実なものにすることが出来
る。尚、巻芯(29)が金属製の場合においても、同様の構
造を採用することが可能である。According to the present embodiment, since the base end of the bar (61) constituting the current collecting member is welded to the ring member (7) while penetrating the ring member (7), the current collecting portion (5) and ring member
The electrical connection between (7) can be secured. It should be noted that the same structure can be adopted even when the core (29) is made of metal.
【００３５】第３実施例 図６及び図７に示す実施例は、集電部材としてコイル部
材(６)を採用すると共に、該コイル部材(６)に対してレ
ーザ溶接を施すことなく、集電部(５)を形成するもので
ある。巻き取り電極体(２)の端部には複数のコイル部材
(６)が放射状に設置されて、電極端縁と噛合している。
又、巻き取り電極体(２)の中央孔(28)の端部にはリング
部材(７)が嵌まっている。更に、巻き取り電極体(２)の
外周面の端部には、複数のコイル部材(６)とリング部材
(７)を包囲して、帯状の締め付け部材(９)が巻回され、
該締め付け部材(９)の両端部(9a)(9b)は互いに束ねられ
て、かしめリング(91)によって連結されている。[0035]Third embodiment The embodiment shown in FIG. 6 and FIG.
Material (6) and the coil member (6)
It forms the current collector (5) without performing user welding.
is there. A plurality of coil members are provided at the end of the winding electrode body (2).
(6) is radially installed and meshes with the electrode edge.
Also, a ring is placed at the end of the central hole (28) of the winding electrode body (2).
The member (7) is fitted. Furthermore, the winding electrode body (2)
At the end of the outer peripheral surface, a plurality of coil members (6) and a ring member
A band-like fastening member (9) is wound around (7),
Both ends (9a) and (9b) of the fastening member (9) are bundled together.
And are connected by a caulking ring (91).
【００３６】組立工程においては、図７に示す如く巻き
取り電極体(２)の端部に締め付け部材(９)を巻回して、
該締め付け部材(９)の両端部(9a)(9b)を互いに束ねた状
態で、該両端部(9a)(9b)にかしめリング(91)を装着す
る。その後、図６に矢印で示す様にかしめリング(91)を
両側から挟圧することによって、締め付け部材(９)を強
く締め付けると共に、締め付け部材(９)の両端部(9a)(9
b)にかしめリング(91)をかしめ固定する。In the assembling step, as shown in FIG. 7, a fastening member (9) is wound around the end of the wound electrode body (2),
With both ends (9a) and (9b) of the fastening member (9) bundled together, a caulking ring (91) is attached to the both ends (9a) and (9b). Thereafter, as shown by the arrow in FIG. 6, the clamping member (9) is strongly tightened by clamping the caulking ring (91) from both sides, and both ends (9a) (9) of the clamping member (9) are tightened.
b) The caulking ring (91) is caulked and fixed.
【００３７】上記の如く締め付け部材(９)を強く締め付
けることによって、各コイル部材(６)はリング部材(７)
と締め付け部材(９)の間で軸方向に圧縮され、巻き取り
電極体(２)の電極端縁を強く挟み込むことになる。この
結果、コイル部材(６)は巻き取り電極体(２)の電極端縁
と噛合した状態で、巻き取り電極体(２)の端部に確実に
固定されると共に、リング部材(７)に圧接されることに
なる。本実施例によれば、コイル部材(６)を巻き取り電
極体(２)の端部に溶接する必要がないので、工程の簡略
化が可能である。By strongly tightening the tightening member (9) as described above, each coil member (6) becomes a ring member (7).
And the tightening member (9) is axially compressed, and strongly sandwiches the electrode edge of the wound electrode body (2). As a result, while the coil member (6) is engaged with the electrode edge of the winding electrode body (2), the coil member (6) is securely fixed to the end of the winding electrode body (2), and is fixed to the ring member (7). It will be pressed. According to this embodiment, it is not necessary to weld the coil member (6) to the end of the winding electrode body (2), so that the process can be simplified.
【００３８】尚、本発明の各部構成は上記実施の形態に
限らず、特許請求の範囲に記載の技術的範囲内で種々の
変形が可能である。例えば、第１実施例及び第２実施例
において、集電部(５)を形成する方法としては、コイル
部材(６)に通電して、ジュール熱によってコイル部材
(６)を電極端縁に融着させる方法を採用することも可能
である。この場合、棒材(61)は省略することが可能であ
る。又、銅製のコイル部材(６)にはニッケルメッキを施
すことによって、大きなジュール熱を発生させることが
出来る。又、第１実施例〜第３実施例において、コイル
部材(６)単体、又はコイル部材(６)と棒材(61)の組合せ
からなる集電部材に替えて、図８に示す如く板材を屏風
折りしてなる屏風状部材(63)を採用することも可能であ
る。The configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims. For example, in the first embodiment and the second embodiment, as a method of forming the current collector (5), the coil member (6) is energized, and the coil member is heated by Joule heat.
It is also possible to adopt a method of fusing (6) to the electrode edge. In this case, the bar (61) can be omitted. By applying nickel plating to the copper coil member (6), large Joule heat can be generated. In the first to third embodiments, a plate member as shown in FIG. 8 is used instead of the coil member (6) alone or the current collecting member composed of a combination of the coil member (6) and the bar (61). It is also possible to adopt a folding screen-like member (63) formed by folding a folding screen.
【図１】本発明に係るリチウムイオン二次電池の第１実
施例の断面図である。FIG. 1 is a sectional view of a first embodiment of a lithium ion secondary battery according to the present invention.
【図２】第１実施例において採用されている巻き取り電
極体及び集電構造の斜視図である。FIG. 2 is a perspective view of a winding electrode body and a current collecting structure employed in the first embodiment.
【図３】該巻き取り電極体及び集電構造の要部を拡大し
て示す断面図である。FIG. 3 is an enlarged cross-sectional view showing a main part of the winding electrode body and the current collecting structure.
【図４】第２実施例において採用されている巻き取り電
極体及び集電構造の斜視図である。FIG. 4 is a perspective view of a winding electrode body and a current collecting structure employed in a second embodiment.
【図５】該巻き取り電極体及び集電構造の要部を拡大し
て示す断面図である。FIG. 5 is an enlarged sectional view showing a main part of the winding electrode body and the current collecting structure.
【図６】第３実施例において採用されている巻き取り電
極体及び集電構造の斜視図である。FIG. 6 is a perspective view of a winding electrode body and a current collecting structure employed in a third embodiment.
【図７】該巻き取り電極体及び集電構造の組立工程の一
部を示す斜視図である。FIG. 7 is a perspective view showing a part of an assembling process of the winding electrode body and the current collecting structure.
【図８】集電部材の他の構成例を示す斜視図であるFIG. 8 is a perspective view showing another configuration example of the current collecting member.
【図９】出願人が以前に開発したリチウムイオン二次電
池に採用されている巻き取り電極体及び集電構造の斜視
図である。FIG. 9 is a perspective view of a winding electrode body and a current collecting structure employed in a lithium ion secondary battery previously developed by the applicant.
【図１０】従来のリチウムイオン二次電池の断面図であ
る。FIG. 10 is a cross-sectional view of a conventional lithium ion secondary battery.
【図１１】巻き取り電極体の一部展開斜視図である。FIG. 11 is a partially developed perspective view of a wound electrode body.
(１) 電池缶 (15) 筒体 (16) 蓋体 (２) 巻き取り電極体 (21) 正極 (22) セパレータ (23) 負極 (４) 正極端子機構 (40) 負極端子機構 (５) 集電部 (６) コイル部材 (61) 棒材 (７) リング部材 (74) 連結部材 (９) 締め付け部材 (1) Battery can (15) Cylindrical body (16) Lid (2) Winding electrode body (21) Positive electrode (22) Separator (23) Negative electrode (4) Positive terminal mechanism (40) Negative terminal mechanism (5) Collection Electrical part (6) Coil member (61) Bar (7) Ring member (74) Connecting member (9) Tightening member
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H022 AA09 AA18 BB02 BB11 BB12 CC02 CC03 CC08 CC12 CC16 CC22 5H029 AJ02 AJ14 BJ02 BJ14 CJ03 CJ05 CJ07 DJ05 DJ07 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H022 AA09 AA18 BB02 BB11 BB12 CC02 CC03 CC08 CC12 CC16 CC22 5H029 AJ02 AJ14 BJ02 BJ14 CJ03 CJ05 CJ07 DJ05 DJ07
Claims (12)
と負極(23)の間にセパレータ(22)を介在させてなる巻き
取り電極体(２)が収容され、該巻き取り電極体(２)が発
生する電力を、密閉容器に設けられた正極端子部及び負
極端子部から外部へ取り出すことが可能な電気エネルギ
ー蓄積デバイスにおいて、 巻き取り電極体(２)の巻き軸方向の両端部の内、少なく
とも一方の端部には、正極(21)又は負極(23)の端縁が突
出すると共に、該電極端縁と接合されて巻き取り電極体
(２)の中央部から外周部まで放射状に伸びる複数の集電
部(５)と、巻き取り電極体(２)の中央孔(28)に嵌まる導
電性リング部材(７)とを具え、前記複数の集電部(５)の
基端部がリング部材(７)に接続され、リング部材(７)が
前記正極端子部又は負極端子部に連結されていることを
特徴とする電気エネルギー蓄積デバイス。1. A strip-shaped positive electrode (21) in a closed container.
A winding electrode body (2) formed by interposing a separator (22) between the electrode and the negative electrode (23) is accommodated, and the power generated by the winding electrode body (2) is supplied to a positive electrode terminal provided in a closed container. An electric energy storage device that can be taken out of the winding electrode body (2) in the winding axis direction, at least one end of the winding electrode body (2) has a positive electrode (21) or a negative electrode. The edge of (23) projects and is joined to the electrode edge to form a wound electrode body.
(2) a plurality of current collectors (5) extending radially from a central portion to an outer peripheral portion; and a conductive ring member (7) fitted into a central hole (28) of the winding electrode body (2). A base end of the plurality of current collectors (5) is connected to a ring member (7), and the ring member (7) is connected to the positive electrode terminal or the negative electrode terminal. device.
する複数の凹部を有する集電部材によって形成されてい
る請求項１に記載の電気エネルギー蓄積デバイス。2. The electric energy storage device according to claim 1, wherein the current collecting section is formed by a current collecting member having a plurality of concave portions meshing with the electrode edge.
請求項２に記載の電気エネルギー蓄積デバイス。3. The electric energy storage device according to claim 2, wherein the current collecting member is thermally fused to an edge of the electrode.
なるコイル部材(６)と、該コイル部材(６)の中央部を貫
通する棒材(61)とから構成されている請求項２又は請求
項３に記載の電気エネルギー蓄積デバイス。4. A current collecting member comprising: a coil member (6) formed by forming a wire into a coil; and a bar (61) penetrating a central portion of the coil member (6). The electric energy storage device according to claim 2 or 3.
貫通する貫通孔(76)が開設され、リング部材(７)と棒材
(61)の端部とが互いに溶接されている請求項４に記載の
電気エネルギー蓄積デバイス。5. The ring member (7) is provided with a through hole (76) through which the end of the bar (61) penetrates, and the ring member (7) and the bar
The electrical energy storage device according to claim 4, wherein the ends of the (61) are welded to each other.
風状部材(63)によって構成されている請求項２又は請求
項３に記載の電気エネルギー蓄積デバイス。6. The electric energy storage device according to claim 2, wherein the current collecting member is constituted by a folding screen-shaped member formed by folding a plate material.
取り電極体(２)を周囲から挟圧して、集電部材を軸方向
に圧縮するための締め付け部材(９)が取り付けられてい
る請求項２乃至請求項６の何れかに記載の電気エネルギ
ー蓄積デバイス。7. A fastening member (9) for pressing the winding electrode body (2) from the periphery and compressing the current collecting member in the axial direction is attached to the outer peripheral surface of the winding electrode body (2). The electrical energy storage device according to any one of claims 2 to 6, wherein
成され、該内ねじにねじ部材が螺合し、帯状の連結部材
(74)の基端部が、リング部材(７)とねじ部材の間に挟持
されると共に、該連結部材(74)の先端部が正極端子部又
は負極端子部に連結されている請求項１乃至請求項７の
何れかに記載の電気エネルギー蓄積デバイス。8. An inner thread is formed in a central hole of the ring member (7), and a screw member is screwed into the inner thread to form a belt-shaped connecting member.
The base end of (74) is sandwiched between the ring member (7) and the screw member, and the front end of the connecting member (74) is connected to the positive terminal or the negative terminal. An electric energy storage device according to any one of claims 7 to 9.
され、該巻き取り電極体(２)が発生する電力を、密閉容
器に設けられた正極端子部及び負極端子部から外部へ取
り出すことが可能な電気エネルギー蓄積デバイスの製造
方法において、 巻き取り電極体(２)を構成すべき正極(21)、負極(23)及
びセパレータ(22)を作製する第１工程と、 少なくとも一方の端部に正極(21)又は負極(23)の端縁が
突出する様に、セパレータ(22)を間に挟んで正極(21)と
負極(23)とを重ね合わせ、これらを渦巻き状に巻き取る
ことによって、巻き取り電極体(２)を作製する第２工程
と、 正極(21)又は負極(23)の端縁が突出した巻き取り電極体
(２)の端部に、電極端縁に噛合可能な複数の凹部を有す
る複数の集電部材を放射状に設置して、各集電部材の凹
部を電極端縁に噛合せしめると共に、該巻き取り電極体
(２)の端部に開口する中央孔(28)には、導電性リング部
材(７)を嵌合せしめる第３工程と、 前記複数の集電部材を電極端縁及びリング部材(７)にレ
ーザ溶接して、巻き取り電極体(２)の中央部から外周部
まで伸びる複数の集電部(５)を形成すると共に、各集電
部(５)の基端部をリング部材(７)に接続する第４工程
と、 リング部材(７)を正極端子部又は負極端子部に連結する
第５工程とを有することを特徴とする電気エネルギー蓄
積デバイスの製造方法。9. A wound electrode body (2) is accommodated in a closed container, and electric power generated by the wound electrode body (2) is transferred from a positive electrode terminal portion and a negative electrode terminal portion provided in the closed container to the outside. In a method of manufacturing an electrical energy storage device that can be taken out, a first step of manufacturing a positive electrode (21), a negative electrode (23), and a separator (22) to constitute a winding electrode body (2); The positive electrode (21) and the negative electrode (23) are overlapped with the separator (22) therebetween so that the edge of the positive electrode (21) or the negative electrode (23) protrudes from the end, and these are spirally wound. A second step of producing a wound electrode body (2) by taking off; a wound electrode body in which the edge of the positive electrode (21) or the negative electrode (23) protrudes.
At the end of (2), a plurality of current collecting members having a plurality of concave portions that can be engaged with the electrode edges are radially installed, and the concave portions of each current collecting member are engaged with the electrode edges, and the winding is performed. Electrode body
A third step of fitting a conductive ring member (7) into a central hole (28) opening at the end of (2); and connecting the plurality of current collecting members to an electrode edge and a ring member (7). Laser welding is performed to form a plurality of current collectors (5) extending from the center to the outer periphery of the winding electrode body (2), and the base end of each current collector (5) is connected to a ring member (7). And a fifth step of connecting the ring member (7) to the positive electrode terminal portion or the negative electrode terminal portion.
部材(６)と、該コイル部材(６)の中央部を貫通する棒材
(61)によって、前記集電部材を構成する請求項９に記載
の電気エネルギー蓄積デバイスの製造方法。10. A coil member (6) formed by forming a wire into a coil shape, and a bar penetrating through a central portion of the coil member (6).
The method for manufacturing an electric energy storage device according to claim 9, wherein the current collecting member is constituted by (61).
が貫通する貫通孔(76)が開設され、第４工程では、リン
グ部材(７)と棒材(61)の前記端部とを互いに溶接する請
求項１０に記載の電気エネルギー蓄積デバイスの製造方
法。11. The ring member (7) is provided with a through hole (76) through which the end of the bar (61) penetrates. In the fourth step, the ring member (7) and the bar (61) are The method of manufacturing an electric energy storage device according to claim 10, wherein the end portions are welded to each other.
3)によって、前記集電部材を構成する請求項９に記載の
電気エネルギー蓄積デバイスの製造方法。12. A folding screen-shaped member (6) formed by folding a board material into a folding screen.
The method for manufacturing an electric energy storage device according to claim 9, wherein the current collecting member is configured by 3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11212375A JP2001035474A (en) | 1999-07-27 | 1999-07-27 | Electric energy storage device and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11212375A JP2001035474A (en) | 1999-07-27 | 1999-07-27 | Electric energy storage device and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001035474A true JP2001035474A (en) | 2001-02-09 |
Family
ID=16621536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11212375A Pending JP2001035474A (en) | 1999-07-27 | 1999-07-27 | Electric energy storage device and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001035474A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005052967A1 (en) * | 2003-11-25 | 2005-06-09 | Asahi Glass Company, Limited | Capacitor |
| JP2005294344A (en) * | 2004-03-31 | 2005-10-20 | Matsushita Electric Ind Co Ltd | Capacitor |
| US20090280406A1 (en) * | 2006-06-02 | 2009-11-12 | Kiyomi Kozuki | Secondary battery |
| CN102064339A (en) * | 2010-12-21 | 2011-05-18 | *** | Lithium battery and assembling method thereof |
| JP2013239300A (en) * | 2012-05-14 | 2013-11-28 | Toyota Industries Corp | Power storage device |
| CN114221067A (en) * | 2021-11-13 | 2022-03-22 | 四川英能基科技有限公司 | Battery cathode structure, battery and preparation method |
-
1999
- 1999-07-27 JP JP11212375A patent/JP2001035474A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005052967A1 (en) * | 2003-11-25 | 2005-06-09 | Asahi Glass Company, Limited | Capacitor |
| JP2005294344A (en) * | 2004-03-31 | 2005-10-20 | Matsushita Electric Ind Co Ltd | Capacitor |
| US20090280406A1 (en) * | 2006-06-02 | 2009-11-12 | Kiyomi Kozuki | Secondary battery |
| CN102064339A (en) * | 2010-12-21 | 2011-05-18 | *** | Lithium battery and assembling method thereof |
| JP2013239300A (en) * | 2012-05-14 | 2013-11-28 | Toyota Industries Corp | Power storage device |
| CN114221067A (en) * | 2021-11-13 | 2022-03-22 | 四川英能基科技有限公司 | Battery cathode structure, battery and preparation method |
| CN114221067B (en) * | 2021-11-13 | 2023-05-09 | 四川英能基科技有限公司 | Battery cathode structure, battery and preparation method |
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