JP4134521B2 - Sealed battery - Google Patents

Sealed battery Download PDF

Info

Publication number
JP4134521B2
JP4134521B2 JP2001076460A JP2001076460A JP4134521B2 JP 4134521 B2 JP4134521 B2 JP 4134521B2 JP 2001076460 A JP2001076460 A JP 2001076460A JP 2001076460 A JP2001076460 A JP 2001076460A JP 4134521 B2 JP4134521 B2 JP 4134521B2
Authority
JP
Japan
Prior art keywords
positive electrode
current collector
electrode current
sealed battery
negative electrode
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.)
Expired - Fee Related
Application number
JP2001076460A
Other languages
Japanese (ja)
Other versions
JP2002279962A (en
Inventor
勝彦 岡本
明師 伊藤
一弥 岡部
宏 油布
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GS Yuasa Corp
Original Assignee
GS Yuasa Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GS Yuasa Corp filed Critical GS Yuasa Corp
Priority to JP2001076460A priority Critical patent/JP4134521B2/en
Publication of JP2002279962A publication Critical patent/JP2002279962A/en
Application granted granted Critical
Publication of JP4134521B2 publication Critical patent/JP4134521B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

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

Description

【０００１】
【発明の属する技術分野】
本発明は密閉形電池に係り、特にセパレータを介して負極および正極を積層させた発電要素を有し、この発電要素の一方の側面に負極集電板を接続するとともに他方の側面に正極集電板を接続した密閉形電池に関する。
【０００２】
【従来の技術】
図12に示す密閉形電池70は、セパレータを介して負極および正極が積層されるとともに、略楕円状に偏平された巻回式の発電要素72と、発電要素72の軸方向両端部にそれぞれ設けられた正極部74および負極部76と、正極部74および負極部76にそれぞれ接続された正極集電板75および負極集電板77と、正極集電板75および負極集電板77にそれぞれ接続されるとともに、発電要素72の正極部74側から発電要素72の軸線に対して略平行に延びる正極端子78および負極端子79と、正極端子78の端部78Ａおよび負極端子79の端部79Ａが外部露出するように発電要素72を収容する略箱状の密閉形電池用パッケージ80を有している。
【０００３】
発電要素72の負極は帯状の銅箔とされ、幅方向両端部から銅が所定幅で露出するように、その両面に炭素系の有機高分子が活物質として塗布されている。
一方、発電要素72の正極は帯状のアルミニウム箔とされ、幅方向両端部からアルミニウムが所定幅で露出するように、その両面にコバルト、ニッケル、マンガン等の酸化物が活物質として塗布されている。
【０００４】
ところで、正極集電板75や負極集電板77は、集電効率を高めるために種々の改良が施されている。例えば、特開平10-26144号公報の技術は、図１３に示すように、図12に示す正極集電板75に相当する正極集電板82のプレート84を蛇腹状にプレス加工し、それぞれの折曲げ部85Ａ，85Ｂ，85Ｃに、積層した数枚の正極87（図14参照）を挟み込む。
次に、図14に示すように、蛇腹状のプレート84の折曲げ部85Ａ，85Ｂ，85Ｃに形成した切欠き部86から露出した正極87を溶接部88で埋めるようにレーザ光で溶接することにより、折曲げ部85に正極87を接続する。
【０００５】
【発明が解決しようとする課題】
しかし、正極集電板82には、蛇腹状の折曲げ部85Ａ，85Ｂ，85Ｃと正極端子（図示せず）を取付ける取付孔91との間に、幅が狭い部位92が存在し、この部位92は集電経路を構成する。このように、集電経路の途中に幅の狭い部位92が存在するために、集電時に、この部位92の集電抵抗が大きくなり、集電効率を高める上で妨げになる。
【０００６】
また、折曲げ部85の切欠き部86から露出した正極87を埋めるように溶接するためには、露出した正極87を避けて溶接するため、レーザの角度を、一例として15度に高精度に調整する必要がある。このため、設備費が嵩み、密閉形電池のコストを抑える上で妨げになる。
さらに、図13に示す折曲げ部85の一部85Ａが破損してしまうと、その他の折曲げ部85Ｂ，85Ｃも部位92から離れた状態になるので、折曲げ部85Ｂ，85Ｃからも集電することができなくなり、集電効率を高める上で妨げになる。
【０００７】
本発明は、前述した問題点に鑑みてなされたものであり、その目的は、集電効率を高めることができ、かつコストを抑えることができる密閉形電池を提供することにある。
【０００８】
【課題を解決するための手段】
前述した目的を達成するために、本発明は、請求項１に記載したように、セパレータを介して負極および正極が積層されてなる偏平巻回式の発電要素の軸方向両端部に、それぞれ、前記正極となる金属箔の面方向端縁からなる正極部および前記負極となる金属箔の面方向端縁からなる負極部が設けられ、前記軸方向のそれぞれの端部において、前記金属箔の面方向端縁部が、複数配置された断面略Ｖ字状の集電部のそれぞれに複数枚ずつ挟持され、前記略Ｖ字状の断面は発電要素の偏平方向に沿い軸方向と直交する方向に連続するように配置されており、前記集電部同士がそれぞれの長手方向端部において端子支持部を介して連結されていることを特徴とする密閉形電池である。
【０００９】
このように構成された密閉形電池においては、断面略Ｖ字状の集電部で金属箔を複数枚づつ積層収容し、複数の集電部を、長手方向端部に設けられた端子支持部を介して連結した。よって、発電要素の両側から集電できる。
また、複数の集電部を端子支持部を介して連結することで、集電経路の途中に急激に狭くなる部分がない。このため、集電の際に、集電抵抗を小さく抑えることができる。
さらに、複数の集電部を端子支持部を介して連結することで、それぞれの集電部から、いわば並列に集電できるので、万一特定箇所が破損した場合でも、その他の部分から集電できる。
【００１０】
ここで、前記各集電部と前記端子支持部とを溶接により接続すると、各集電部と端子支持部を一体に形成する必要がない。
【００１１】
また、前記各集電部をプレス加工することで、切削加工と比べて集電部を容易に形成できる。
【００１２】
【発明の実施の形態】
以下、本発明に係る実施形態を図面に基づいて詳細に説明する。なお、以下に説明する各実施形態において、既に図１において説明した部材等については、図中に同一符号あるいは相当符号を付すことにより説明を簡略化あるいは省略する。
【００１３】
図１に示すように、本発明に係る第１実施形態である密閉形電池10は、セパレータ（図示せず）を介して正極および負極となるそれぞれの金属箔12（正極の金属箔12のみを図示する）を具備した３個の発電要素14と、正極となる金属箔12の面方向端縁に電気抵抗溶接により接続された正極集電板15と、負極となる金属箔の面方向端縁に電気抵抗溶接により接続された負極集電板20と、正負極の集電板15，20にそれぞれ接続された正負極の端子25，26と、正極端子25の端部25Ａおよび負極端子26の端部26Ａが外部露出するように発電要素14を収容する略箱状の密閉形電池用パッケージ29とを有している。
【００１４】
図２に示すように正極集電板15は、正極となる金属箔12を複数枚づつ積層収容する断面略Ｖ字状の正極集電部16が複数設けられているとともに、各正極集電部16が互いに並列配置され、各正極集電部16が長手方向端部17に設けられた正極端子支持部18を介して連結されている。
【００１５】
ここで、各正極集電部16は、略楕円状に偏平された巻回式の発電要素14の両側14Ａ，14Ｂに渡って配置されることにより、発電要素14の両側14Ａ，14Ｂから集電できるので、集電効率を高めることができる。
また、複数の正極集電部16をそれぞれ個別に正極端子支持部18に連結することで、集電経路の途中に急激に狭くなる部分がない。このため、集電の際に、集電経路の集電抵抗を小さく抑えることができ、集電効率を高めることができる。
【００１６】
さらに、複数の正極集電部16を個別に正極端子支持部18に連結することで、複数の正極集電部16はそれぞれ正極端子支持部18に独立した状態で接続されている。よって、各正極集電部16から正極端子支持部18まで、いわば並列に集電できるので、万一特定箇所（すなわち、複数の正極集電部16のうちの１個）が破損した場合でも、その他の正極集電部16から集電できる。このため、集電効率を高めることができる。
【００１７】
この正極端子支持部18は、中央18Ａで折り曲げることにより略Ｌ型とし、下片19Ａに各正極集電部16のそれぞれの長手方向端部17が接続され、上片19Ｂが発電要素14の上側14Ｃ（図１参照）に被せるように配置され、この上片19Ｂに正極電極25が立設されている。よって、正極電極25は発電要素14の上側14Ｃ側に備えられている。
【００１８】
図１に示す負極集電板20は、正極集電板15と同様に、負極となる金属箔を複数枚づつ積層収容する断面略Ｖ字状の負極集電部（図示せず）が複数設けられているとともに、各負極集電部が互いに並列配置され、各負極集電部が長手方向端部（図示せず）に設けられた負極端子支持部21を介して連結されている。よって、正極集電板と同じ効果を得ることができる。
なお、負極集電板20は正極集電板15と同じ構成なので、以下正極集電板15について説明して負極集電板20の説明を省略する。
【００１９】
図２に示す正極集電板15は、上述したように、各正極集電部16が正極端子支持部18に溶接により接続されている。よって、各正極集電部16と正極端子支持部18を一体に形成する必要がないので、部品コストや製造コストを抑えることができる。
また、各正極集電部16は、プレス加工により断面略Ｖ字形に形成されている。各正極集電部16をプレス加工することで、各正極集電部16を切削加工する場合と比較して安価に形成できる。
【００２０】
図３に示すように、正極集電部16に嵌め込んだ正極となる金属箔12は、正極集電部16の稜部16Ａにレーザ光28を照射することにより、正極集電部16の稜部16Ａと金属箔12とが溶接される。
このように、レーザ光28を正極集電部16の稜部16Ａまでの距離を調整するだけでよいので、レーザ光28の角度を厳密に調整しなくても、金属箔12と正極集電部16の稜部16Ａとを確実に溶接して接続できる。このため、レーザ光28の角度を調整するための設備費を抑えることができる。
加えて、レーザ光28の角度を厳密に調整する必要がないので、溶接ミスの発生を防ぐことができる。このため、密閉型電池10の品質を高めることもできる。
【００２１】
また、正極集電部16は、略Ｖ形に折り曲げられた両片16Ｂ，16Ｃを、両側から矢印のように加締められている。このように、正極集電部16の両片16Ｂ，16Ｃを加締めることで、正極集電部16に複数枚の金属箔12を安定して差込んだ状態に確実に保つことができ、レーザ光の付き抜けを確実に防止できる。このため、密閉型電池10の品質を高めることができる。
【００２２】
次に、第２実施形態を図４〜図６に基づいて説明する。
図４に示す第２実施形態の正極集電板30は、正極集電部31の稜部31Ａに複数の貫通孔32が所定間隔をおいて形成されている。よって図５に示すように、正極となる金属箔12が正極集電部31の奥まで差込まれたどうかを確認できる。
加えて、正極集電部31の稜部31Ａに貫通孔32を設けることで、図６に示す展開した状態の正極集電部31を、稜部31Ａで矢印のように容易に折り曲げることができる。このため、密閉型電池1Oの品質を高めることができる。
【００２３】
次いで、第３実施形態を図７〜図９に基づいて説明する。
図７に示す第３実施形態の正極集電板40は、正極集電部41の稜部41Ａに設けられたスリット（貫通孔）42が稜部41Ａから裾部41Ｂに向かって所定長さ連続して形成されている。
このように、正極集電部41の稜部41Ａにスリット42を設けることで、図８に示すように、正極となる金属箔12が正極集電部41の奥まで差込まれたどうかを確認できる。
【００２４】
加えて、スリット42を、稜部41Ａから裾部41Ｂに向かって所定長さ連続させることで、正極集電部41のＶ形に折り曲げた両片を加締める際に、軽い加締力で加締めることができるので、金属箔12を正極集電部41で確実に把持できる。このため、密閉型電池10の品質を高めることができる。
【００２５】
なお、図９に示す正極集電部41を展開した幅Ｗと、スリット42の長さＷ１との関係は、
Ｗ１≦（1/2）×Ｗ
とすることが好ましい。
Ｗ１が（1/2）×Ｗを越えると、正極集電部41が破断する虞れがあるからである。但し、正極集電部41が破断する虞れがない場合にはＷ１が（1/2）×Ｗを越えることも可能である。
【００２６】
また、正極集電部41の幅Ｗ２は0.1〜0.5mmに設定することが好ましい。正極集電部41の幅Ｗ２が0.1mmより小さいと、スリット42が小さ過ぎて、スリット42を形成することによる効果を得ることが難しく、またスリット42を加工するための設備が嵩む虞れがある。
一方、正極集電部41の幅Ｗ２が0.5mmを越えると、スリット42の幅Ｗ２が大き過ぎて金属箔12と正極集電部41との接続部分が少なくなり、集電効率を低下させる。また、正極集電部41の剛性を確保することが難しい。
【００２７】
次に、第３実施形態および第４実施形態の密閉形電池を図10、図11に基づいて説明する。
図10に示す第３実施形態の密閉形電池50は、正極集電板51の正極集電部52および正極端子支持部53が一体に形成され、負極集電板55の負極集電部（図示せず）および負極端子支持部57が一体に形成されている。
よって、各正極集電部52を正極端子支持部53に溶接する手間を省くことができ、かつ負極集電部を負極端子支持部57に溶接する手間を省くことができる。
【００２８】
図11に示す第４実施形態の密閉形電池60は、正負極の集電板61，65のそれぞれの正極端子支持部62，66をＬ形に折り曲げない構成にすることで、正負極の端子67，68を発電要素14の両端14Ｄ，14Ｅに備えられている。
よって、密閉形電池の用途に合わせて正負極の端子の位置を適宜変更できる。
【００２９】
なお、本発明の密閉形電池は、前述した実施形態に限定されるものではなく、適宜な変形、改良等が可能である。
その他、前述した各実施形態において例示した負極，正極，発電要素，正負極の集電板，正負極の集電部、正負極の端子支持部等の材質，形状，寸法，形態，数，配置個所，厚さ寸法等は本発明を達成できるものであれば任意であり、限定されない。
【００３０】
【発明の効果】
以上、説明したように、本発明によれば、請求項１に記載したように、断面略Ｖ字状の集電部で金属箔を複数枚づつ積層収容し、複数の集電部を、長手方向端部に設けられた端子支持部を介して連結した。このため、発電要素の両側から集電できるので、集電効率を高めることができる。
【００３１】
また、複数の集電部を端子支持部を介して連結することで、集電経路の途中に急激に狭くなる部分がない。このため、集電の際に、集電抵抗を小さく抑えることができ、集電効率を高めることができる。
さらに、複数の集電部を端子支持部を介して連結することで、それぞれの集電部から、いわば並列に集電できるので、万一特定箇所が破損した場合でも、その他の部分から集電できる。このため、集電効率を高めることができる。
また、電極各部と集電端子までの抵抗の差が小さくなるため、高率の充放電においても電極の電位分布および作動深度のばらつきが少なくでき、サイクル寿命の低下を少なくできる。
【図面の簡単な説明】
【図１】本発明に係る第１実施形態の密閉形電池を示す斜視図である。
【図２】本発明に係る第１実施形態の密閉形電池の要部拡大図である。
【図３】本発明に係る第１実施形態の密閉形電池の正極集電部を示す断面図である。
【図４】本発明に係る第２実施形態の密閉形電池の正極集電板を示す斜視図である。
【図５】本発明に係る第２実施形態の密閉形電池の正極集電部を示す側面図である。
【図６】本発明に係る第２実施形態の密閉形電池の正極集電板を示す展開図である。
【図７】本発明に係る第３実施形態の密閉形電池の正極集電板を示す斜視図である。
【図８】本発明に係る第３実施形態の密閉形電池の正極集電部を示す側面図である。
【図９】本発明に係る第３実施形態の密閉形電池の正極集電部を示す展開図である。
【図１０】本発明に係る第４実施形態の密閉形電池を示す斜視図である。
【図１１】本発明に係る第５実施形態の密閉形電池を示す斜視図である。
【図１２】従来の密閉形電池を示す斜視図である。
【図１３】従来の密閉形電池の正極集電板を示す斜視図である。
【図１４】従来の密閉形電池の正極集電板を示す側面図である。
【符号の説明】
10，50，60 密閉形電池
12 金属箔
14 発電要素
15，30，40，51，61 集電板（正極集電板）
16，31，41，52 集電部（正極集電部）
17 長手方向端部
18，53，62 端子支持部（正極端子支持部）
20，55，65 集電板（負極集電板）
21，57，66 端子支持部（正極端子支持部）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealed battery, and in particular, has a power generation element in which a negative electrode and a positive electrode are stacked via a separator, and a negative electrode current collector plate is connected to one side surface of the power generation element and a positive electrode current collector is connected to the other side surface. The present invention relates to a sealed battery to which plates are connected.
[0002]
[Prior art]
A sealed battery 70 shown in FIG. 12 has a negative electrode and a positive electrode laminated via a separator, and is provided at each of both ends of the power generation element 72 in the axial direction and a winding type power generation element 72 flattened in a substantially elliptical shape. The positive electrode portion 74 and the negative electrode portion 76, the positive electrode current collector plate 75 and the negative electrode current collector plate 77 connected to the positive electrode portion 74 and the negative electrode portion 76, respectively, and the positive electrode current collector plate 75 and the negative electrode current collector plate 77, respectively. In addition, a positive electrode terminal 78 and a negative electrode terminal 79 that extend substantially parallel to the axis of the power generation element 72 from the positive electrode portion 74 side of the power generation element 72, an end portion 78A of the positive electrode terminal 78, and an end portion 79A of the negative electrode terminal 79 are provided. A substantially box-shaped sealed battery package 80 that houses the power generation element 72 is exposed outside.
[0003]
The negative electrode of the power generation element 72 is a strip-shaped copper foil, and a carbon-based organic polymer is applied as an active material on both sides so that copper is exposed at a predetermined width from both ends in the width direction.
On the other hand, the positive electrode of the power generation element 72 is a strip-shaped aluminum foil, and an oxide such as cobalt, nickel, manganese, etc. is applied as an active material on both sides so that aluminum is exposed with a predetermined width from both ends in the width direction. .
[0004]
By the way, the positive electrode current collector plate 75 and the negative electrode current collector plate 77 are variously improved in order to increase the current collection efficiency. For example, as shown in FIG. 13, the technique disclosed in Japanese Patent Application Laid-Open No. 10-26144 presses the plate 84 of the positive electrode current collector plate 82 corresponding to the positive electrode current collector plate 75 shown in FIG. Several stacked positive electrodes 87 (see FIG. 14) are sandwiched between the bent portions 85A, 85B, 85C.
Next, as shown in FIG. 14, the positive electrode 87 exposed from the notch 86 formed in the bent portions 85A, 85B, 85C of the bellows-like plate 84 is welded with laser light so as to be filled with the weld 88. Thus, the positive electrode 87 is connected to the bent portion 85.
[0005]
[Problems to be solved by the invention]
However, the positive current collector plate 82 has a narrow portion 92 between the bellows-like bent portions 85A, 85B, 85C and the mounting hole 91 for attaching the positive electrode terminal (not shown). 92 constitutes a current collecting path. Thus, since the narrow part 92 exists in the middle of the current collection path, the current collection resistance of the part 92 increases during current collection, which hinders the improvement of the current collection efficiency.
[0006]
Also, in order to weld the positive electrode 87 exposed from the notch 86 of the bent portion 85 so as to fill the positive electrode 87, welding is performed avoiding the exposed positive electrode 87. Need to adjust. For this reason, an installation cost increases, and it becomes a hindrance in suppressing the cost of a sealed battery.
Further, if a part 85A of the bent portion 85 shown in FIG. 13 is broken, the other bent portions 85B and 85C are also separated from the portion 92, and therefore the current is collected from the bent portions 85B and 85C. It becomes impossible to increase the current collection efficiency.
[0007]
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a sealed battery that can increase the current collection efficiency and reduce the cost.
[0008]
[Means for Solving the Problems]
To achieve the above object, the present invention is, as described in claim 1, both axial end portions of the power generating element of the flat winding type negative electrode and the positive electrode via the separator are laminated, respectively, A positive electrode portion composed of a surface direction edge of the metal foil serving as the positive electrode and a negative electrode portion composed of a surface direction edge of the metal foil serving as the negative electrode are provided, and at each end in the axial direction, the surface of the metal foil A plurality of edge portions in the direction are sandwiched between each of the plurality of current collecting portions having a substantially V-shaped cross section, and the substantially V-shaped cross section extends in a direction perpendicular to the axial direction along the flattening direction of the power generation element. It is arranged so as successive, Ru sealed battery der, wherein the current collecting portions are connected through the terminal support portion in each of the longitudinal ends.
[0009]
In the sealed battery configured as described above, a plurality of metal foils are stacked and accommodated in a current collecting portion having a substantially V-shaped cross section, and the plurality of current collecting portions are provided at the end portions in the longitudinal direction. Connected through. Therefore, current can be collected from both sides of the power generation element.
In addition, by connecting the plurality of current collectors via the terminal support part, there is no portion that suddenly narrows in the middle of the current collection path. For this reason, at the time of current collection, current collection resistance can be suppressed small.
Furthermore, by connecting multiple current collectors via the terminal support, current can be collected from each current collector in parallel, so even if a specific location is damaged, current can be collected from other parts. it can.
[0010]
Here, the contact Ru connection to by welding said each current collecting portion and the terminal supporting portions, there is no need to integrally form the respective collector portion and the terminal supporting portion.
[0011]
Also, the pre-Symbol respective collector portions is processed up less, the collector portion can be easily formed as compared with cutting.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail based on the drawings. In each embodiment described below, members and the like already described in FIG. 1 are given the same or corresponding reference numerals in the drawing to simplify or omit the description.
[0013]
As shown in FIG. 1, the sealed battery 10 according to the first embodiment of the present invention includes a metal foil 12 (only the positive metal foil 12) that serves as a positive electrode and a negative electrode through a separator (not shown). 3), a positive current collecting plate 15 connected to the edge of the metal foil 12 serving as the positive electrode by electric resistance welding, and an edge of the metal foil serving as the negative electrode in the surface direction. Of negative electrode current collector plate 20 connected to each other by positive resistance welding, positive and negative electrode current collector plates 15 and 20 connected to positive and negative current collector plates 15 and 20, respectively, end 25A of positive electrode terminal 25 and negative electrode terminal 26 It has a substantially box-shaped sealed battery package 29 that houses the power generation element 14 so that the end 26A is exposed to the outside.
[0014]
As shown in FIG. 2, the positive electrode current collector plate 15 is provided with a plurality of positive electrode current collector portions 16 each having a substantially V-shaped cross section for accommodating a plurality of metal foils 12 serving as positive electrodes. 16 are arranged in parallel to each other, and the respective positive electrode current collectors 16 are connected via positive electrode terminal support portions 18 provided at the end portions 17 in the longitudinal direction.
[0015]
Here, each positive electrode current collector 16 is arranged over both sides 14A and 14B of the wound power generation element 14 flattened in a substantially elliptical shape, thereby collecting current from both sides 14A and 14B of the power generation element 14. As a result, current collection efficiency can be increased.
Further, by connecting each of the plurality of positive electrode current collectors 16 to the positive electrode terminal support 18 individually, there is no portion that suddenly narrows in the middle of the current collection path. For this reason, at the time of current collection, the current collection resistance of the current collection path can be kept small, and the current collection efficiency can be increased.
[0016]
Further, the plurality of positive electrode current collectors 16 are individually connected to the positive electrode terminal support 18 so that the plurality of positive electrode current collectors 16 are independently connected to the positive electrode terminal support 18. Therefore, since the current can be collected in parallel from each positive electrode current collector 16 to the positive electrode terminal support 18, even if a specific location (that is, one of the positive electrode current collectors 16) is damaged, Current can be collected from the other positive electrode current collector 16. For this reason, current collection efficiency can be improved.
[0017]
The positive terminal support 18 is substantially L-shaped by being bent at the center 18A, the longitudinal ends 17 of the positive current collectors 16 are connected to the lower piece 19A, and the upper piece 19B is connected to the upper side of the power generating element 14. 14C (see FIG. 1) is disposed so that a positive electrode 25 is erected on the upper piece 19B. Therefore, the positive electrode 25 is provided on the upper side 14 </ b> C side of the power generation element 14.
[0018]
As in the case of the positive electrode current collector plate 15, the negative electrode current collector plate 20 shown in FIG. 1 is provided with a plurality of negative electrode current collectors (not shown) each having a substantially V-shaped cross section for accommodating a plurality of metal foils each serving as a negative electrode. In addition, the negative electrode current collectors are arranged in parallel to each other, and the negative electrode current collectors are connected to each other via a negative electrode terminal support 21 provided at a longitudinal end (not shown). Therefore, the same effect as the positive electrode current collector plate can be obtained.
Since the negative electrode current collector plate 20 has the same configuration as the positive electrode current collector plate 15, the positive electrode current collector plate 15 will be described below and the description of the negative electrode current collector plate 20 will be omitted.
[0019]
In the positive electrode current collector plate 15 shown in FIG. 2, as described above, each positive electrode current collector 16 is connected to the positive electrode terminal support 18 by welding. Therefore, it is not necessary to form each positive electrode current collector 16 and positive electrode terminal support 18 integrally, so that component costs and manufacturing costs can be suppressed.
Moreover, each positive electrode current collection part 16 is formed in the cross-sectional substantially V shape by press work. By pressing each positive electrode current collector 16, it can be formed at a lower cost than when each positive electrode current collector 16 is cut.
[0020]
As shown in FIG. 3, the metal foil 12 serving as the positive electrode fitted into the positive electrode current collector 16 irradiates the ridge 16 </ b> A of the positive electrode current collector 16 with a laser beam 28, thereby ridges of the positive electrode current collector 16. The portion 16A and the metal foil 12 are welded.
In this way, since the laser beam 28 only needs to be adjusted to the distance to the ridge 16A of the positive electrode current collector 16, the metal foil 12 and the positive electrode current collector are not required to adjust the angle of the laser beam 28 strictly. The 16 ridges 16A can be securely welded and connected. For this reason, the equipment cost for adjusting the angle of the laser beam 28 can be suppressed.
In addition, since it is not necessary to strictly adjust the angle of the laser light 28, it is possible to prevent occurrence of welding errors. For this reason, the quality of the sealed battery 10 can be improved.
[0021]
Further, the positive electrode current collector 16 is caulked with both pieces 16B and 16C bent in a substantially V shape as shown by arrows from both sides. In this way, by crimping the two pieces 16B and 16C of the positive electrode current collector 16, a plurality of metal foils 12 can be stably inserted into the positive electrode current collector 16 and reliably maintained. It is possible to reliably prevent the light from coming off. For this reason, the quality of the sealed battery 10 can be improved.
[0022]
Next, 2nd Embodiment is described based on FIGS.
In the positive electrode current collector plate 30 of the second embodiment shown in FIG. 4, a plurality of through holes 32 are formed at predetermined intervals in the ridge portion 31 </ b> A of the positive electrode current collector 31. Therefore, as shown in FIG. 5, it can be confirmed whether or not the metal foil 12 serving as the positive electrode has been inserted deep into the positive electrode current collector 31.
In addition, by providing the through hole 32 in the ridge 31A of the positive electrode current collector 31, the positive electrode current collector 31 in the unfolded state shown in FIG. 6 can be easily bent as indicated by the arrow at the ridge 31A. . For this reason, the quality of the sealed battery 1O can be improved.
[0023]
Next, a third embodiment will be described with reference to FIGS.
In the positive electrode current collector plate 40 of the third embodiment shown in FIG. 7, slits (through holes) 42 provided in the ridge 41A of the positive electrode current collector 41 are continuous for a predetermined length from the ridge 41A toward the skirt 41B. Is formed.
Thus, by providing the slit 42 in the ridge 41A of the positive electrode current collector 41, it is confirmed whether the metal foil 12 serving as the positive electrode has been inserted deep into the positive electrode current collector 41 as shown in FIG. it can.
[0024]
In addition, the slit 42 is continued for a predetermined length from the ridge 41A toward the skirt 41B, so that when the two pieces of the positive electrode current collector 41 bent into the V shape are crimped, the slit 42 is applied with a light clamping force. Since the metal foil 12 can be tightened, the positive electrode current collector 41 can securely hold the metal foil 12. For this reason, the quality of the sealed battery 10 can be improved.
[0025]
The relationship between the width W of the positive electrode current collector 41 shown in FIG. 9 and the length W1 of the slit 42 is as follows:
W1 ≦ (1/2) × W
It is preferable that
This is because if W1 exceeds (1/2) × W, the positive electrode current collector 41 may be broken. However, W1 can exceed (1/2) × W when there is no possibility that the positive electrode current collector 41 is broken.
[0026]
The width W2 of the positive electrode current collector 41 is preferably set to 0.1 to 0.5 mm. If the width W2 of the positive electrode current collector 41 is smaller than 0.1 mm, the slit 42 is too small and it is difficult to obtain the effect of forming the slit 42, and the equipment for processing the slit 42 may be increased. is there.
On the other hand, when the width W2 of the positive electrode current collector 41 exceeds 0.5 mm, the width W2 of the slit 42 is too large, and the connection portion between the metal foil 12 and the positive electrode current collector 41 is reduced, thereby reducing the current collection efficiency. In addition, it is difficult to ensure the rigidity of the positive electrode current collector 41.
[0027]
Next, the sealed batteries according to the third and fourth embodiments will be described with reference to FIGS.
In the sealed battery 50 of the third embodiment shown in FIG. 10, the positive electrode current collector 52 and the positive electrode terminal support 53 of the positive electrode current collector 51 are integrally formed, and the negative electrode current collector 55 of the negative electrode current collector 55 (see FIG. 10). (Not shown) and the negative electrode terminal support 57 are integrally formed.
Therefore, it is possible to save the time and labor for welding each positive electrode current collector 52 to the positive electrode terminal support 53 and the time to weld the negative current collector to the negative electrode terminal support 57.
[0028]
The sealed battery 60 of the fourth embodiment shown in FIG. 11 has positive and negative electrode terminals by making the positive electrode terminal support portions 62 and 66 of the positive and negative current collector plates 61 and 65 not bent into an L shape. 67 and 68 are provided at both ends 14D and 14E of the power generation element 14, respectively.
Therefore, the positions of the positive and negative terminals can be appropriately changed according to the use of the sealed battery.
[0029]
The sealed battery of the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made.
In addition, the materials, shapes, dimensions, forms, numbers, and arrangements of the negative electrode, positive electrode, power generation element, positive / negative current collector plate, positive / negative current collector, positive / negative terminal support, etc., exemplified in each of the embodiments described above A location, a thickness dimension, etc. are arbitrary as long as this invention can be achieved, and it is not limited.
[0030]
【The invention's effect】
As described above, according to the present invention, as described in claim 1, a plurality of metal foils are stacked and accommodated in a current collecting portion having a substantially V-shaped cross section, and a plurality of current collecting portions are arranged in a longitudinal direction. It connected via the terminal support part provided in the direction edge part. For this reason, since current can be collected from both sides of the power generation element, current collection efficiency can be increased.
[0031]
In addition, by connecting the plurality of current collectors via the terminal support part, there is no portion that suddenly narrows in the middle of the current collection path. For this reason, at the time of current collection, current collection resistance can be suppressed small and current collection efficiency can be improved.
Furthermore, by connecting multiple current collectors via the terminal support, current can be collected from each current collector in parallel, so even if a specific location is damaged, current can be collected from other parts. it can. For this reason, current collection efficiency can be improved.
In addition, since the difference in resistance between each part of the electrode and the current collecting terminal is reduced, variations in electrode potential distribution and operating depth can be reduced even during high-rate charging / discharging, and the reduction in cycle life can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a sealed battery according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of the sealed battery according to the first embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a positive electrode current collector of the sealed battery according to the first embodiment of the present invention.
FIG. 4 is a perspective view showing a positive electrode current collector plate of a sealed battery according to a second embodiment of the present invention.
FIG. 5 is a side view showing a positive electrode current collector of a sealed battery according to a second embodiment of the present invention.
FIG. 6 is a development view showing a positive electrode current collector plate of a sealed battery according to a second embodiment of the present invention.
FIG. 7 is a perspective view showing a positive electrode current collector plate of a sealed battery according to a third embodiment of the present invention.
FIG. 8 is a side view showing a positive electrode current collector of a sealed battery according to a third embodiment of the present invention.
FIG. 9 is a development view showing a positive electrode current collector of a sealed battery according to a third embodiment of the present invention.
FIG. 10 is a perspective view showing a sealed battery according to a fourth embodiment of the invention.
FIG. 11 is a perspective view showing a sealed battery according to a fifth embodiment of the invention.
FIG. 12 is a perspective view showing a conventional sealed battery.
FIG. 13 is a perspective view showing a positive electrode current collector plate of a conventional sealed battery.
FIG. 14 is a side view showing a positive electrode current collector plate of a conventional sealed battery.
[Explanation of symbols]
10, 50, 60 sealed battery
12 Metal foil
14 Power generation elements
15, 30, 40, 51, 61 Current collector (positive current collector)
16, 31, 41, 52 Current collector (positive current collector)
17 Longitudinal edge
18, 53, 62 Terminal support (positive terminal support)
20, 55, 65 Current collector plate (Negative electrode current collector plate)
21, 57, 66 Terminal support (positive terminal support)

Claims (2)

セパレータを介して負極および正極が積層されてなる偏平巻回式の発電要素の軸方向両端部に、それぞれ、前記正極となる金属箔の面方向端縁からなる正極部および前記負極となる金属箔の面方向端縁からなる負極部が設けられ、前記軸方向のそれぞれの端部において、前記金属箔の面方向端縁部が、複数配置された断面略Ｖ字状の集電部のそれぞれに複数枚ずつ挟持され、前記略Ｖ字状の断面は発電要素の偏平方向に沿い軸方向と直交する方向に連続するように配置されており、前記集電部同士がそれぞれの長手方向端部において端子支持部を介して連結されていることを特徴とする密閉形電池。A positive electrode part composed of a planar edge of the metal foil serving as the positive electrode and a metal foil serving as the negative electrode, respectively, at both ends in the axial direction of the flat-winding type power generation element in which the negative electrode and the positive electrode are laminated via a separator A negative electrode portion composed of an edge in the surface direction is provided, and at each end portion in the axial direction, a plurality of surface direction edge portions of the metal foil are disposed in each of the current collecting portions having a substantially V-shaped cross section. each plurality is clamped, the substantially V-shaped cross-section is arranged so as to be continuous in a direction orthogonal to the along-axis direction in the flat direction of the power generating element, the current collector to each other in each of the longitudinal ends A sealed battery, which is connected through a terminal support. 前記集電部材は、稜部に貫通孔又はスリットを備えている請求項１記載の密閉形電池。 The sealed battery according to claim 1, wherein the current collecting member includes a through hole or a slit in a ridge portion .
JP2001076460A 2001-03-16 2001-03-16 Sealed battery Expired - Fee Related JP4134521B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001076460A JP4134521B2 (en) 2001-03-16 2001-03-16 Sealed battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001076460A JP4134521B2 (en) 2001-03-16 2001-03-16 Sealed battery

Publications (2)

Publication Number Publication Date
JP2002279962A JP2002279962A (en) 2002-09-27
JP4134521B2 true JP4134521B2 (en) 2008-08-20

Family

ID=18933386

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001076460A Expired - Fee Related JP4134521B2 (en) 2001-03-16 2001-03-16 Sealed battery

Country Status (1)

Country Link
JP (1) JP4134521B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011111661A1 (en) 2010-03-12 2011-09-15 株式会社Ｇｓユアサ Battery
US10115937B2 (en) 2009-08-27 2018-10-30 Kabushiki Kaisha Toshiba Battery including branched current collector sections

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003100886A1 (en) 2002-05-27 2003-12-04 Japan Storage Battery Co., Ltd. Battery
KR100560498B1 (en) * 2004-05-19 2006-03-14 삼성에스디아이 주식회사 Secondary battery and battery module using the same
KR100627360B1 (en) * 2004-09-24 2006-09-21 삼성에스디아이 주식회사 Plate used to collect current, secondary battery and module thereof
KR100637443B1 (en) * 2005-07-05 2006-10-20 삼성에스디아이 주식회사 Secondary battery and terminal assembly using the same
EP3896783A1 (en) 2010-02-17 2021-10-20 Kabushiki Kaisha Toshiba Battery comprising a lid, a safety valve and a current collecting lead
HUE051418T2 (en) * 2011-06-10 2021-03-01 Schott Ag Feedthrough
JP2015074028A (en) * 2013-10-12 2015-04-20 日本アビオニクス株式会社 Pressure laser welding method and device
KR102222120B1 (en) * 2014-05-22 2021-03-03 삼성에스디아이 주식회사 Secondary battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10115937B2 (en) 2009-08-27 2018-10-30 Kabushiki Kaisha Toshiba Battery including branched current collector sections
WO2011111661A1 (en) 2010-03-12 2011-09-15 株式会社Ｇｓユアサ Battery

Also Published As

Publication number Publication date
JP2002279962A (en) 2002-09-27

Similar Documents

Publication Publication Date Title
JP4554565B2 (en) Secondary battery
EP1961058B1 (en) Electrochemical battery and method for making same
JP4987228B2 (en) Electrochemical battery bundle and manufacturing method thereof
JP4515373B2 (en) Secondary battery
KR100866767B1 (en) Safety Kit for Secondary Battery
US9159505B2 (en) Electric storage device
US20180026308A1 (en) Layered cell and method of manufacturing the same
WO2012073399A1 (en) Battery module and battery pack
JP4210896B2 (en) Sealed battery
JP2006012827A (en) Secondary battery
JP2005285773A (en) Electrode assembly and secondary battery with the same
US7943253B2 (en) Sealed battery and manufacturing method therefor
JP4134521B2 (en) Sealed battery
JP2002279961A (en) Sealed battery
KR20180051366A (en) Electric power storage device and method of manufacturing the same
US6713211B2 (en) Square shaped battery
US20060040176A1 (en) Prismatic battery cells, batteries with prismatic battery cells and methods of making same
US10892453B2 (en) Battery pack and method of manufacturing battery pack
JP5558878B2 (en) Assembled battery, resistance welding method, and assembled battery manufacturing method
JP2004241150A (en) Battery
JP4099609B2 (en) battery
US20130065107A1 (en) Method for joining multiple parallel tabs
JP2004213937A (en) Battery
KR100627296B1 (en) Secondary battery and terminal assembly using the same
JP4099610B2 (en) battery

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20041110

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20051219

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060125

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20060725

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080130

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080331

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080507

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080520

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 4134521

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110613

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110613

Year of fee payment: 3

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110613

Year of fee payment: 3

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110613

Year of fee payment: 3

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

R371 Transfer withdrawn

Free format text: JAPANESE INTERMEDIATE CODE: R371

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110613

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110613

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120613

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120613

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130613

Year of fee payment: 5

LAPS Cancellation because of no payment of annual fees