JP2000173597A - Paste-form band electrode for winding - Google Patents
Paste-form band electrode for windingInfo
- Publication number
- JP2000173597A JP2000173597A JP10343232A JP34323298A JP2000173597A JP 2000173597 A JP2000173597 A JP 2000173597A JP 10343232 A JP10343232 A JP 10343232A JP 34323298 A JP34323298 A JP 34323298A JP 2000173597 A JP2000173597 A JP 2000173597A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- paste
- winding
- active material
- wound
- 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.)
- Withdrawn
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
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- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は捲回型ペースト式帯
状電極に係り、さらに詳しくは圧着や捲回による湾曲・
歪みなどの発生を防止し、信頼性の高い電極群の構成に
適する捲回型ペースト式帯状電極に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wound-type paste-type strip electrode, and more particularly, to a method of bending and winding by crimping or winding.
The present invention relates to a wound-type paste band electrode that prevents generation of distortion and the like and is suitable for a highly reliable electrode group.
【０００２】[0002]
【従来の技術】近年、携帯電話機や携帯用ノート型バソ
コンなど、電子機器類のコードレス化、高性能化、ある
いは小形軽量化の推進に伴って、これら電子機器類の主
電源となる電池の高容量化が要求されている。そして、
このような電子機器類の主電源として、高容量化を図れ
るニッケル水素二次電池、あるいはリチウム二次電池な
どの実用化が進められている。2. Description of the Related Art In recent years, with the promotion of cordless, high performance, and compact and lightweight electronic devices such as portable telephones and portable notebook computers, the height of batteries serving as main power sources for these electronic devices has been increasing. Capacity is required. And
As a main power source for such electronic devices, nickel-metal hydride secondary batteries or lithium secondary batteries capable of achieving high capacity have been put into practical use.
【０００３】また、この種のニッケル水素二次電池など
は、一般的に、帯状の正極層および負極層の間に、電解
液（電解質）を担持するセパレーター層を介挿させて捲
回し、電極群（発電要素部）を形成し、この電極群を電
池外装容器内に液密に封装した構成を採っている。[0003] In addition, this type of nickel-hydrogen secondary battery or the like is generally wound with a separator layer carrying an electrolytic solution (electrolyte) interposed between a belt-like positive electrode layer and a negative electrode layer. A group (power generation element portion) is formed, and this electrode group is liquid-tightly sealed in a battery outer container.
【０００４】ところで、前記二次電池の電極群（電極要
素部）、たとえばニッケル水素二次電池の電極群は、一
般的に、帯状の集電体にニッケル化合物を含む正極活物
質層を設けたものを正極層とし、また、同じく帯状の集
電体にCaCu5 型の結晶構造を有する水素吸蔵合金を含む
負極活物質層を設けたものを負極層として構成されてい
る。The electrode group (electrode element portion) of the secondary battery, for example, the electrode group of a nickel-metal hydride secondary battery, generally has a positive electrode active material layer containing a nickel compound provided on a belt-shaped current collector. The negative electrode layer is formed as a positive electrode layer, and a negative electrode layer provided with a negative electrode active material layer including a hydrogen storage alloy having a CaCu 5 type crystal structure on a strip-shaped current collector is also configured.
【０００５】そして、集電体に対する電極活物質層の形
成は、先ず、対応するペースト状ないしゲル状の電極活
物質を調製し、このペースト状ないしゲル状の電極活物
質を帯状の集電体面に塗工した後、乾燥・圧着などの処
理を施して行われている。ここで、帯状集電体面に対す
る電極活物質の塗工は、高容量化ないし体積効率の向上
を図るために、電極活物質の充填量（電極活物質が担持
される量）を増加させる必要がある。なお、電極活物質
系ペーストの塗工膜を乾燥した後の圧着は、活物質層の
付着密度向上させ、電極要素部の高容量化ないし高性能
化するために行われる。To form an electrode active material layer on a current collector, first, a corresponding paste-like or gel-like electrode active material is prepared, and the paste-like or gel-like electrode active material is applied to a belt-like current collector surface. After coating, drying and pressing are performed. Here, in the application of the electrode active material to the belt-shaped current collector surface, it is necessary to increase the filling amount (the amount of the electrode active material carried) of the electrode active material in order to increase the capacity or improve the volume efficiency. is there. The pressing after drying the coating film of the electrode active material-based paste is performed to improve the adhesion density of the active material layer and increase the capacity or performance of the electrode element portion.
【０００６】また、前記帯状集電体としては、たとえば
アルミニウム、銅、ニッケル、チタン、ステンレスなど
の帯状金属箔、あるいはエキスバンドメタルのような帯
状金網状もしくは帯状多孔薄板状などが挙げられる。な
お、これら帯状集電体の形態は、無孔なシート、孔あき
シート、ネット状（網状）シートなどであり、その厚さ
は20〜50μm 程度である。Examples of the band-shaped current collector include a band-shaped metal foil such as aluminum, copper, nickel, titanium, and stainless steel, or a band-shaped wire mesh or band-shaped porous thin plate such as ex-band metal. The form of these band-shaped current collectors is a non-porous sheet, a perforated sheet, a net-like (net-like) sheet, and the like, and the thickness thereof is about 20 to 50 μm.
【０００７】[0007]
【発明が解決しようとする課題】上記のように、捲回用
のペースト式帯状電極は、電池の高容量化と体積効率の
向上を目的に、電極活物質の充填量（担持量）を増大さ
せると、帯状電極の電極活物質膜厚が必然的に厚くなっ
て、結果的に、柔軟性が低下する。この柔軟性の低下
は、セパレーターを介挿して正極層および負極層を捲回
して渦巻き形の電極群を製作した場合、特に、正極層の
巻き始め部などに、クラックが不均一に生じる原因とな
る。As described above, the paste-type strip electrode for winding has an increased filling amount (supporting amount) of the electrode active material for the purpose of increasing the capacity of the battery and improving the volumetric efficiency. When this is done, the thickness of the electrode active material of the strip electrode is inevitably increased, and as a result, the flexibility is reduced. This decrease in flexibility is a cause of uneven cracking, especially at the beginning of winding of the positive electrode layer when a positive electrode layer and a negative electrode layer are wound through a separator to produce a spiral electrode group. Become.
【０００８】また、前記電極活物質の膜厚増大は、結果
的に、捲回・形成した渦巻き形電極群の外径増大とな
り、規定された外装缶内に収納できず、不良品化するこ
ともある。さらに、前記クラックの不均一な発生は、捲
回・捲装の巻きズレを生じたり、あるいは内部短絡の発
生を招来するという問題もある。In addition, the increase in the thickness of the electrode active material results in an increase in the outer diameter of the spirally wound spirally formed electrode group, which cannot be accommodated in a specified outer can, resulting in a defective product. There is also. Furthermore, the uneven generation of the cracks causes a problem that the winding / winding is misaligned or an internal short circuit occurs.
【０００９】前記問題への対策として、被着・担持させ
た電極活物質層を圧縮して、長手方向の端縁側に、長さ
方向と直交する方向（幅方向に）溝部を形成することも
試みられているが、帯状電極に反りが生じる場合もあ
り、帯状電極の搬送などにおいてトラブルが起こり、製
造工程が煩雑化するという懸念もある。As a countermeasure against the above-mentioned problem, the electrode active material layer deposited and supported may be compressed to form a groove at a longitudinal edge side in a direction perpendicular to the length direction (in the width direction). Although attempts have been made, there is a concern that the strip-shaped electrode may be warped, a trouble may occur in transporting the strip-shaped electrode, and the manufacturing process may be complicated.
【００１０】本発明は、上記事情に対処してなされたも
ので、捲装ないし捲回操作において不均一なクラック発
生の恐れが解消され、高品質の捲回型電極群を歩留まり
よく製造できる捲回型ペースト式帯状電極の提供を目的
とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and eliminates the possibility of uneven cracks occurring during the winding or winding operation, thereby enabling a high-quality wound electrode group to be manufactured with good yield. It is an object of the present invention to provide a round paste type strip electrode.
【００１１】[0011]
【課題を解決するための手段】請求項１の発明は、集電
体の少なくとも一主面に活物質合剤層が形成されて成る
捲回型ペースト式帯状電極であって、長手方向の少なく
とも巻き始め端縁側に、レーザー加工により長手方向に
直交する溝が設けられていることを特徴とする捲回型ペ
ースト式帯状電極である。The invention according to claim 1 is a wound paste-type strip-shaped electrode in which an active material mixture layer is formed on at least one main surface of a current collector. A wound paste type strip-shaped electrode characterized in that a groove orthogonal to the longitudinal direction is provided on the winding start edge side by laser processing.
【００１２】請求項２の発明は、請求項１記載の捲回型
ペースト式帯状電極において、溝の間隔が 0.1〜15mmで
あることを特徴とする。According to a second aspect of the present invention, in the rolled paste type strip electrode according to the first aspect, the interval between the grooves is 0.1 to 15 mm.
【００１３】請求項３の発明は、請求項１もしくは請求
項２記載の捲回型ペースト式帯状電極において、溝の深
さが帯状電極厚の 1〜70％であることを特徴とする。According to a third aspect of the present invention, in the rolled paste type strip electrode according to the first or second aspect, the depth of the groove is 1 to 70% of the thickness of the strip electrode.
【００１４】請求項１〜３の発明において、捲回型帯状
電極は帯状の集電体、たとえば帯状Ni基体面に、正極活
物質を含む電極合剤を塗着・乾燥し、要すれば圧着処理
を施したものである。ここで、帯状集電体の性状は、無
孔なシート（箔）、孔あきシート（箔）、ネット状（網
状）シートなどで特に限定されないが、一般的に、その
目付量が 300〜 400 g/m2 程度、より好ましくは 300〜
350 g/m程度である。また、前記帯状集電体、たとえば
体Ni基体に塗着された電極合剤は、正極活物質と、エチ
レンカーボネートなどの非水溶媒と、過塩素酸リチウム
などの電解質と、さらに要すれば導電材やバインダーな
どの添加成分とを混練してペースト化されたものが挙げ
られる。In the invention according to any one of the first to third aspects, the wound strip electrode is formed by applying and drying an electrode mixture containing a positive electrode active material on a strip-shaped current collector, for example, a strip Ni substrate. It has been processed. Here, the properties of the belt-shaped current collector are not particularly limited, such as a non-porous sheet (foil), a perforated sheet (foil), and a net-like (net-like) sheet. g / m 2, more preferably about 300 to
It is about 350 g / m. Further, the electrode mixture coated on the belt-shaped current collector, for example, the body Ni substrate, contains a positive electrode active material, a non-aqueous solvent such as ethylene carbonate, an electrolyte such as lithium perchlorate, and if necessary, a conductive material. A material obtained by kneading a material or an additive component such as a binder into a paste may be used.
【００１５】なお、前記正極活物質としては、たとえば
リチウムマンガン複合酸化物、二酸化マンガン、リチウ
ム含有コバルト酸化物、リチウム含有ニッケルコバルト
酸化物、リチウム含有の非晶質五酸化バナジウム、カル
コゲン化合物などが挙げられる。その他、水酸化ニッケ
ル、導電材およびバインダーなどの添加成分とを混練し
てペースト化されたものでもよい。The positive electrode active material includes, for example, lithium manganese composite oxide, manganese dioxide, lithium-containing cobalt oxide, lithium-containing nickel cobalt oxide, lithium-containing amorphous vanadium pentoxide, chalcogen compound and the like. Can be In addition, a paste obtained by kneading nickel hydroxide, a conductive material and an additive component such as a binder may be used.
【００１６】請求項１〜３の発明において、電極合剤の
組成は特に限定されないが、通常、電極活物質 100重量
部に対し、導電剤 5〜13重量部より好ましくは 7〜 8重
量部、結着剤 0.1〜 1.0重量部より好ましくは 0.3〜
0.6重量部の割合とし、溶媒を加えて固形分比率を70〜8
0重量％程度としたものである。そして、帯状集電体の
表裏両面に電極合剤を塗布した後、乾燥によって塗布層
中の溶媒が除去される。In the first to third aspects of the present invention, the composition of the electrode mixture is not particularly limited, but is usually 5 to 13 parts by weight, more preferably 7 to 8 parts by weight, based on 100 parts by weight of the electrode active material. Binder 0.1 to 1.0 parts by weight, more preferably 0.3 to
0.6 parts by weight, and add a solvent to increase the solid content ratio from 70 to 8
It is about 0% by weight. After the electrode mixture is applied to both the front and back surfaces of the belt-shaped current collector, the solvent in the applied layer is removed by drying.
【００１７】ここで、乾燥手段は、たとえば熱風乾燥、
遠赤外線乾燥、ドラム接触などであり、これらの単独ま
たは組合せで行うこともでき、熱風乾燥の場合の乾燥温
度は、電極合剤の組成によって異なるが、通常50〜 150
℃（特に60〜 140℃）程度が好ましい。また、上記帯状
集電体面に塗布（塗着）した電極合剤の乾燥後、対を成
すローラー（プレスローラー）間を通過させ、線圧で 2
〜 5ton/cm程度、好ましくは線圧で 3〜 4ton/cm程度
で、さらに、ローラー温度を室温〜 200℃程度に加温し
た状態で加圧しょりが施される。Here, the drying means is, for example, hot air drying,
Far-infrared drying, drum contact, etc., can be performed alone or in combination.The drying temperature in the case of hot air drying varies depending on the composition of the electrode mixture, but is usually 50 to 150.
C (particularly 60 to 140 C) is preferred. After the electrode mixture applied (coated) to the belt-shaped current collector surface is dried, the electrode mixture is passed through a pair of rollers (press rollers), and is subjected to a linear pressure.
Pressing is performed at about 5 ton / cm, preferably about 3 to 4 ton / cm in linear pressure, and further with the temperature of the roller heated to room temperature to about 200 ° C.
【００１８】なお、捲回型電極群の構成に当っては、前
記帯状電極板から、所要の寸法、形状に切り出された帯
状電極の所定領域、たとえば一辺のほぼ中央部箇所の一
部を除去して集電体の一部を選択的に露出させ、この露
出領域に集電リブを取着してある。In the construction of the wound electrode group, a predetermined region of the strip electrode cut into a required size and shape, for example, a part of a substantially central portion of one side is removed from the strip electrode plate. Then, a part of the current collector is selectively exposed, and a current collecting rib is attached to the exposed area.
【００１９】請求項１〜３の発明において、ペースト式
帯状電極の長手方向の少なくとも巻き始め端縁側におけ
る幅方向の溝の形成は、レーザーエネルギーの照射で行
われる。ここで、溝の形成にレーザー加工を選択したの
は、所要の位置に、精度よく所望の幅や深さの溝を再現
性よく形成できるだけでなく、これによって不均一なク
ラック発生の恐れも容易に解消ないし回避できるからで
ある。In the first to third aspects of the present invention, the formation of the groove in the width direction at least at the winding start edge in the longitudinal direction of the paste-type strip electrode is performed by laser energy irradiation. Here, laser processing was selected to form the grooves. Not only can grooves of a desired width and depth be formed at required positions with high reproducibility, but also the possibility of uneven cracks can be easily generated. This is because it can be eliminated or avoided.
【００２０】なお、前記溝の形成・配置領域は、少なく
ともペースト式帯状電極の長手方向の端縁部、すなわち
巻き始め（捲回）開始から 2〜 4周目程度に相当する領
域であり、さらに要すれば、最終の捲回 2〜 4層程度に
相当する領域でる。そして、この溝の間隔（ピッチ）
は、ペースト式帯状電極の種類・構成にもよるが、一般
的に、 0.1〜15mm程度が好ましい。また、前記溝の深さ
は、ペースト式帯状電極の種類・構成にもよるが、一般
的には、そのペースト式帯状電極厚さの 1〜70％程度が
好ましい。The region where the groove is formed and arranged is at least an edge in the longitudinal direction of the paste-type strip electrode, that is, a region corresponding to about 2 to 4 turns from the start of winding (winding). If necessary, this is an area corresponding to about 2 to 4 layers of the final winding. And the interval (pitch) of this groove
Although it depends on the type and configuration of the paste-type strip-shaped electrode, generally, it is preferably about 0.1 to 15 mm. Further, the depth of the groove depends on the type and configuration of the paste-type strip electrode, but is generally preferably about 1 to 70% of the thickness of the paste-type strip electrode.
【００２１】請求項１〜３の発明では、捲回型ペースト
式帯状電極の少なくとも巻き始め側の領域に、レーザー
加工による溝が長手方向に対して直交する方向に設けら
れている。すなわち、捲回・捲装の開始時において、比
較的厳しい曲成に伴って長手方向に加わる圧縮（捲回内
側）と伸張（捲回外側）とが容易に緩和され、不均一な
クラックの発生が防止、もしくは低減されて内部短絡な
どの発生する恐れのない捲回型電極群を形成することが
可能となる。According to the first to third aspects of the present invention, a groove formed by laser processing is provided at least in a region on the winding start side of the wound-type paste band electrode in a direction perpendicular to the longitudinal direction. That is, at the start of winding / winding, compression (winding inside) and extension (winding outside) applied in the longitudinal direction due to relatively severe bending are easily alleviated, and uneven cracks are generated. Is prevented or reduced, and it is possible to form a wound-type electrode group in which an internal short circuit or the like does not occur.
【００２２】[0022]
【発明の実施の形態】以下図１および図２を参照して実
施例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS.
【００２３】図１は、実施例に係るペースト式帯状電極
の要部構成を示す斜視図である。FIG. 1 is a perspective view showing the structure of a main part of a paste-type strip electrode according to an embodiment.
【００２４】図１において、１は集電体（図示省略）の
少なくとも一主面に活物質合剤層２が形成されて成る捲
回型ペースト式帯状電極であり、その長手方向の一側端
縁部には、集電ノブ1aが溶接付けされている。また、３
はペースト式帯状電極１の長手方向端縁部において、長
手方向に直交させて活物質合剤層２に、レーザー加工で
設けた溝である。In FIG. 1, reference numeral 1 denotes a wound paste-type strip-shaped electrode in which an active material mixture layer 2 is formed on at least one main surface of a current collector (not shown). A current collecting knob 1a is welded to the edge. Also, 3
Is a groove provided in the active material mixture layer 2 by laser processing at a longitudinal edge of the paste-type strip electrode 1 so as to be orthogonal to the longitudinal direction.
【００２５】ここで、ペースト式帯状電極１は、たとえ
ば帯状の孔あきNiシート（箔）面に、正極活物質を含む
電極合剤を塗着・乾燥し、要すれば圧着処理を施したも
のである。すなわち、集電体としての孔あきNiシート
（箔）に、たとえばリチウムマンガン複合酸化物などの
正極活物質と、エチレンカーボネートなどの非水溶媒
と、過塩素酸リチウムなどの電解質と、さらに要すれば
水酸化ニッケル、導電材、バインダーなどの添加成分と
を混練・調製したペースト（電極合剤）を塗着・乾燥
し、要すれば圧着処理を施したものである。Here, the paste-type strip electrode 1 is, for example, a strip-shaped perforated Ni sheet (foil) coated with an electrode mixture containing a positive electrode active material, dried and, if necessary, subjected to a pressure treatment. It is. That is, a perforated Ni sheet (foil) as a current collector further needs a positive electrode active material such as a lithium manganese composite oxide, a non-aqueous solvent such as ethylene carbonate, and an electrolyte such as lithium perchlorate. For example, a paste (electrode mixture) obtained by kneading and preparing an additive component such as nickel hydroxide, a conductive material, and a binder is applied and dried, and if necessary, subjected to a pressure treatment.
【００２６】なお、上記電極合剤のは、電極活物質 100
重量部に対し、導電剤 5〜13重量部、結着剤 0.1〜 1.0
重量部の割合とし、溶媒を加えて固形分比率を70〜80重
量％程度としたものである。また、前記ペースト式帯状
電極の幅方向に延設した溝３は、捲装時における巻き始
め側、および巻き終了側の捲回 3周分程度にそれぞれ相
当する領域に、間隔 0.5mm程度、深さ 0.2mm程度に設け
られている。The above electrode mixture is composed of 100 parts of the electrode active material.
5 to 13 parts by weight of conductive agent, 0.1 to 1.0 of binder
The ratio is in parts by weight, and the solvent is added to make the solid content ratio about 70 to 80% by weight. Further, the grooves 3 extending in the width direction of the paste-type strip-shaped electrode have a gap of about 0.5 mm and a depth of about 3 turns in the winding start side and the winding end side at the time of winding, respectively. It is provided at about 0.2 mm.
【００２７】次に、上記ペースト式帯状電極１の活物質
層２に、レーザー加工によって所要の溝３を形成する例
を説明する。図２はレーザー加工の実施態様を模式的に
示す斜視図であり、先ず、所定の支持台面（図示省略）
にペースト式帯状電極１を位置決め載置する。このペー
スト式帯状電極１に対して、支持台面をｘ，ｙ方向に移
動・制御しながらレーザー発振器４からレーザーを照射
して、ペースト式帯状電極１の長手方向の両端側に、長
手方向と直交する方向に間隔 0.5mm程度、深さ0.2mm程
度の溝３を形成した。Next, an example in which a required groove 3 is formed in the active material layer 2 of the paste-type strip electrode 1 by laser processing will be described. FIG. 2 is a perspective view schematically showing an embodiment of laser processing. First, a predetermined support table surface (not shown)
The paste-type strip electrode 1 is positioned and mounted. The paste-type strip electrode 1 is irradiated with a laser from a laser oscillator 4 while moving and controlling the support surface in the x and y directions, so that both ends of the paste-type strip electrode 1 in the longitudinal direction are orthogonal to the longitudinal direction. A groove 3 having an interval of about 0.5 mm and a depth of about 0.2 mm was formed in the direction in which the groove 3 was formed.
【００２８】なお、本発明は、上記例示に限定されるも
のでなく、発明の趣旨を逸脱しない範囲でいろいろの変
形を採ることができる。たとえば集電体はNiシート
（箔）の代りに、Ni無孔なシート（箔）やNiネット状
（網状）シートであってもよい。また、ペースト式帯状
電極は、ニッケル水素電池の正極シートだけでなく、ニ
ッケル水素電池の負極シート、リチウム電池用の各電極
シートなど捲回型電極用の場合に適用できる。The present invention is not limited to the above-described example, and various modifications can be made without departing from the spirit of the invention. For example, the current collector may be a Ni non-porous sheet (foil) or a Ni net-like (net-like) sheet instead of the Ni sheet (foil). In addition, the paste-type strip electrode can be applied not only to a positive electrode sheet of a nickel-metal hydride battery, but also to a wound type electrode such as a negative electrode sheet of a nickel-metal hydride battery and each electrode sheet for a lithium battery.
【００２９】[0029]
【発明の効果】請求項１〜３の発明によれば、高用量化
のために、電極活物質の充填量を多くした場合にも、反
りを回避しながら柔軟性を容易に付与されるので、内部
短絡の発生する原因と成る不均一なクラック発生が解消
される。すなわち、高用量、高品質の捲回型電極群（捲
回型電極要素部）の捲装・構成が容易になり、体積効率
の向上が図られた携帯用の電源を歩留まりよく提供でき
る。According to the first to third aspects of the present invention, even when the filling amount of the electrode active material is increased to increase the dose, flexibility can be easily provided while avoiding warpage. In addition, non-uniform cracks which cause internal short circuits are eliminated. That is, it is easy to wind and configure a high-capacity, high-quality wound-type electrode group (rolled-type electrode element portion), and a portable power source with improved volumetric efficiency can be provided with high yield.
【図１】実施例に係るペースト式帯状電極の要部構成を
示す斜視図。FIG. 1 is a perspective view showing a main configuration of a paste-type strip electrode according to an embodiment.
【図２】実施例に係るペースト式帯状電極の所要領域に
長手方向と直交する方向にレーザー加工で溝を形成する
態様を模式的に示す斜視図。FIG. 2 is a perspective view schematically showing an embodiment in which a groove is formed in a required region of the paste-type strip electrode according to the embodiment by laser processing in a direction orthogonal to the longitudinal direction.
１……ペースト式帯状電極 ２……電極活物質層 ３……溝 DESCRIPTION OF SYMBOLS 1 ... Paste strip electrode 2 ... Electrode active material layer 3 ... Groove
Claims (3)
層が形成されて成る捲回型ペースト式帯状電極であっ
て、 長手方向の少なくとも巻き始め端縁側に、レーザー加工
により長手方向に直交する溝が設けられていることを特
徴とする捲回型ペースト式帯状電極。1. A wound paste type strip electrode comprising an active material mixture layer formed on at least one main surface of a current collector, wherein at least a winding start edge in the longitudinal direction is formed by laser processing in a longitudinal direction. A wound type paste-type strip electrode, characterized in that a groove perpendicular to the electrode is provided.
とする請求項１記載の捲回型ペースト式帯状電極。2. The wound paste type strip-shaped electrode according to claim 1, wherein the interval between the grooves is 0.1 to 15 mm.
70％であることを特徴とする請求項１もしくは請求項２
記載の捲回型ペースト式帯状電極。3. The depth of the groove in the groove is from 1 to the thickness of the strip electrode.
3. The method according to claim 1, wherein the rate is 70%.
The wound paste-type strip electrode according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10343232A JP2000173597A (en) | 1998-12-02 | 1998-12-02 | Paste-form band electrode for winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10343232A JP2000173597A (en) | 1998-12-02 | 1998-12-02 | Paste-form band electrode for winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000173597A true JP2000173597A (en) | 2000-06-23 |
Family
ID=18359946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10343232A Withdrawn JP2000173597A (en) | 1998-12-02 | 1998-12-02 | Paste-form band electrode for winding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000173597A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003088404A1 (en) * | 2002-04-12 | 2003-10-23 | Kabushiki Kaisha Toshiba | Nonaqueous electrolyte secondary battery |
| JP2007066665A (en) * | 2005-08-30 | 2007-03-15 | Nissan Motor Co Ltd | Electrode structure, its manufacturing method, secondary battery, battery pack, composite battery pack and vehicle with these batteries mounted thereon |
| WO2009013889A1 (en) * | 2007-07-20 | 2009-01-29 | Panasonic Corporation | Electrode plate for battery, polar plate group for battery, lithium secondary battery, method for manufacturing electrode plate for battery, and apparatus for manufacturing electrode plate for battery |
| US7842418B2 (en) | 2007-07-20 | 2010-11-30 | Panasonic Corporation | Electrode plate for battery, electrode group for battery, lithium secondary battery, method for producing electrode plate for battery and apparatus for producing electrode plate for battery |
| US7854773B2 (en) | 2003-09-30 | 2010-12-21 | Dai Nippon Printing Co., Ltd. | Method of producing an electrode plate for a nonaqueous electrolyte secondary battery |
-
1998
- 1998-12-02 JP JP10343232A patent/JP2000173597A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003088404A1 (en) * | 2002-04-12 | 2003-10-23 | Kabushiki Kaisha Toshiba | Nonaqueous electrolyte secondary battery |
| EP2249417A3 (en) * | 2002-04-12 | 2010-12-08 | Kabushiki Kaisha Toshiba | Nonaqueous electrolyte secondary battery |
| US8530081B2 (en) | 2002-04-12 | 2013-09-10 | Kabushiki Kaisha Toshiba | Nonaqueous electrolyte secondary battery including positive electrode active material layers having parallel grooves |
| US7854773B2 (en) | 2003-09-30 | 2010-12-21 | Dai Nippon Printing Co., Ltd. | Method of producing an electrode plate for a nonaqueous electrolyte secondary battery |
| JP2007066665A (en) * | 2005-08-30 | 2007-03-15 | Nissan Motor Co Ltd | Electrode structure, its manufacturing method, secondary battery, battery pack, composite battery pack and vehicle with these batteries mounted thereon |
| WO2009013889A1 (en) * | 2007-07-20 | 2009-01-29 | Panasonic Corporation | Electrode plate for battery, polar plate group for battery, lithium secondary battery, method for manufacturing electrode plate for battery, and apparatus for manufacturing electrode plate for battery |
| US7842418B2 (en) | 2007-07-20 | 2010-11-30 | Panasonic Corporation | Electrode plate for battery, electrode group for battery, lithium secondary battery, method for producing electrode plate for battery and apparatus for producing electrode plate for battery |
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