JPH11260418A - Nonaqueous electrolyte battery - Google Patents
Nonaqueous electrolyte batteryInfo
- Publication number
- JPH11260418A JPH11260418A JP10062662A JP6266298A JPH11260418A JP H11260418 A JPH11260418 A JP H11260418A JP 10062662 A JP10062662 A JP 10062662A JP 6266298 A JP6266298 A JP 6266298A JP H11260418 A JPH11260418 A JP H11260418A
- Authority
- JP
- Japan
- Prior art keywords
- expanded metal
- current collector
- negative electrode
- positive electrode
- electrolyte battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Primary Cells (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポリマー電解質二
次電池等の非水電解質電池に関し、特に電池の正極及び
負極を構成する集電体に特徴を有する非水電解質電池に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-aqueous electrolyte battery such as a polymer electrolyte secondary battery, and more particularly to a non-aqueous electrolyte battery characterized by a current collector constituting a positive electrode and a negative electrode of the battery.
【０００２】[0002]
【従来の技術】図６及び図７は、非水電解質電池の一例
であるポリマー電解質二次電池の構成例を示すもので、
外装ケースとしてラミネートシートを用いて薄型形状に
構成されたものである。図７は図６のＡ−Ａ線矢視断面
により積層電極４の構成を示しており、負極集電体２ａ
の両面に負極活物質２ｂ、２ｂを塗着して負極２が形成
され、正極集電体１ａに正極活物質１ｂを塗着して正極
１、１が形成されている。この２枚の正極１と負極２と
は、固体電解質からなるセパレータ３を介して積層さ
れ、積層電極４として形成される。この積層電極４は、
図６に示すように、一対のラミネートシートをその周囲
のシール部Ｐ1 、Ｐ2 、Ｐ3 で熱融着により接合した外
装ケース７内に電解液と共に封入される。２枚の正極集
電体１ａ、１ａそれぞれに形成されたリード接続部１
ｃ、１ｃと正極リード８とが接続され、負極集電体２ａ
に形成されたリード接続部２ｃには負極リード９が接続
される。2. Description of the Related Art FIGS. 6 and 7 show a configuration example of a polymer electrolyte secondary battery which is an example of a non-aqueous electrolyte battery.
It is formed in a thin shape using a laminate sheet as an outer case. FIG. 7 shows the configuration of the laminated electrode 4 in a cross section taken along line AA of FIG.
The negative electrode 2 is formed by applying the negative electrode active materials 2b, 2b to both surfaces of the negative electrode 1, and the positive electrodes 1, 1 are formed by applying the positive electrode active material 1b to the positive electrode current collector 1a. The two positive electrodes 1 and the negative electrode 2 are laminated via a separator 3 made of a solid electrolyte, and formed as a laminated electrode 4. This laminated electrode 4
As shown in FIG. 6, a pair of laminated sheets are sealed together with an electrolytic solution in an outer case 7 in which the surrounding seal portions P 1 , P 2 , and P 3 are joined by heat fusion. Lead connection part 1 formed on each of two positive electrode current collectors 1a, 1a
c, 1c and the positive electrode lead 8 are connected, and the negative electrode current collector 2a
The negative electrode lead 9 is connected to the lead connection portion 2c formed at the bottom.
【０００３】この正極リード８及び負極リード９は外装
ケース７の外に絶縁シート１２により絶縁されて引き出
され、電池の正負電極として電池接続の接続端子の用に
供される。The positive electrode lead 8 and the negative electrode lead 9 are drawn out of the outer case 7 by being insulated by the insulating sheet 12 and used as positive and negative electrodes of a battery for connection terminals for battery connection.
【０００４】前記正極１は、正極集電体１ａとするアル
ミニウム製のエキスパンドメタルにペースト状に調整さ
れた正極活物質を塗着し、乾燥させた後、圧延により正
極集電体１ａ上に所定厚さに正極活物質１ｂが結着した
正極シートが形成され、この正極シートから所定形状、
寸法に切り出されて製作される。また、前記負極２は、
負極集電体２ａとする銅製のエキスパンドメタルの両面
にペースト状に調整された負極活物質を塗着し、乾燥さ
せた後、圧延により負極集電体２ａの両面に所定厚さに
負極活物質２ｂが結着した負極シートが形成され、この
負極シートから所定形状、寸法に切り出されて製作され
る。この正極１及び負極２は、それぞれ正極シートまた
は負極シートから切り出されるとき、図６に示すように
正極集電体１ａには中心線から偏心した位置にリード接
続部１ｃが突出形成されるように形成され、負極集電体
２ａには中心線から正極集電体１ａとは逆方向に偏心し
た位置にリード接続部２ｃが突出形成されるように形成
される。前記正極集電体１ａのリード接続部１ｃにはア
ルミニウム製の正極リード８が、負極集電体２ａのリー
ド接続部２ｃには銅製の負極リード９が、それぞれ溶接
点Ｓで抵抗溶接もしくは超音波溶接により接合される。The positive electrode 1 is prepared by applying a paste-shaped positive electrode active material to an aluminum expanded metal serving as a positive electrode current collector 1a, drying it, and then rolling it onto a predetermined surface of the positive electrode current collector 1a. A positive electrode sheet in which the positive electrode active material 1b is bound to a thickness is formed.
It is cut into dimensions and manufactured. Further, the negative electrode 2
A negative electrode active material adjusted to a paste is applied to both surfaces of a copper expanded metal serving as the negative electrode current collector 2a, dried, and then rolled to a predetermined thickness on both surfaces of the negative electrode current collector 2a. A negative electrode sheet to which 2b is bonded is formed, and the negative electrode sheet is cut out from the negative electrode sheet into a predetermined shape and dimensions to be manufactured. When the positive electrode 1 and the negative electrode 2 are cut out from the positive electrode sheet or the negative electrode sheet, respectively, as shown in FIG. 6, the positive electrode current collector 1a is formed such that the lead connection portion 1c protrudes at a position eccentric from the center line. The negative electrode current collector 2a is formed such that the lead connection portion 2c protrudes at a position eccentric from the center line in the opposite direction to the positive electrode current collector 1a. A positive electrode lead 8 made of aluminum is connected to a lead connecting portion 1c of the positive electrode current collector 1a, and a negative electrode lead 9 made of copper is connected to a lead connecting portion 2c of the negative electrode current collector 2a. Joined by welding.
【０００５】[0005]
【発明が解決しようとする課題】上記のように構成され
る非水電解質電池を用いる携帯機器等の小型薄型化、軽
量化の進展に伴って、電池の小型化、軽量化に併せてよ
り高性能であることが要求されている。この要求を満た
すためには、集電体として用いるエキスパンドメタル
は、微細なラス目構造を有する薄いものが必要であり、
更には、薄いものでありながら製造時に加わる引っ張り
力に耐え得る強度が必要であり、活物質との結着性に優
れ、集電性に優れたものが必要とされる課題があった。As portable equipment using the non-aqueous electrolyte battery constructed as described above has become smaller and thinner and lighter, the size and weight of the battery have been increased. Performance is required. In order to satisfy this requirement, the expanded metal used as the current collector must be thin with a fine lath structure.
Furthermore, there is a problem that a thin material is required to have a strength capable of withstanding a tensile force applied during manufacturing, and has an excellent binding property to an active material and an excellent current collecting property.
【０００６】また、集電体は正極及び負極の積層数を増
して構成するほどに同極間をリード接続部で接続し、リ
ードを接続するために、リード接続部の溶接性のよいこ
とが要求されている。しかし、エキスパンドメタルは開
口率が大きく、これを用いた集電体のリード接続部の溶
接は開口部があるため溶接性が悪く、接合強度や通電性
が低下する問題点があった。In addition, as the current collector is constructed by increasing the number of stacked positive and negative electrodes, the same electrode is connected by a lead connection portion, and the lead connection portion has good weldability. Has been requested. However, the expanded metal has a large aperture ratio, and welding of the lead connecting portion of the current collector using the expanded metal has an opening, so that the weldability is poor, and there has been a problem that the joining strength and the electrical conductivity are reduced.
【０００７】本発明の目的とするところは、集電体とし
て用いるエキスパンドメタルの構造を改良して、小型
化、薄型化を実現させながらより高性能な有機電解質電
池を提供することにある。An object of the present invention is to provide an organic electrolyte battery having a higher performance while improving the structure of an expanded metal used as a current collector and realizing miniaturization and thinning.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
の本発明は、エキスパンドメタルを用いて形成された集
電体に活物質を塗着して正極及び負極を形成し、これら
両極を電解質層を介して積層し、電解液と共に外装ケー
ス内に封入すると共に、両電極それぞれの前記集電体の
リード接続部位に接続したリードを前記外装ケース外に
引き出して電池の正電極及び負電極を形成してなる非水
電解質電池において、前記エキスパンドメタルが、厚さ
０．１ｍｍ以下の長尺金属シートを用いて、その幅方向
の任意部分に長尺方向にラス目が形成されない無地部を
設けて形成されてなり、このエキスパンドメタルから前
記リード接続部位が前記無地部に位置するように切り出
した集電体を用いて正極及び負極が形成されてなること
を特徴とする。SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a current collector formed by using an expanded metal, which is coated with an active material to form a positive electrode and a negative electrode. Laminated through the layers, sealed in the outer case together with the electrolytic solution, the lead connected to the lead connection site of the current collector of both electrodes is pulled out of the outer case, and the positive electrode and the negative electrode of the battery. In the non-aqueous electrolyte battery formed, the expanded metal uses a long metal sheet having a thickness of 0.1 mm or less, and provides a solid portion where a lath is not formed in the long direction at an arbitrary portion in the width direction. A positive electrode and a negative electrode are formed by using a current collector cut out from the expanded metal so that the lead connection portion is located in the uncoated portion.
【０００９】この構成によれば、エキスパンドメタルに
形成された無地部がリード接続部位となるように切り出
されて集電体が形成されるので、リード接続部はラス目
の開口部のない状態となり、このリード接続部を同極間
で接続すると共にリードを接続するために溶接すると
き、開口部がないので溶接性がよく、確実に溶接による
接合を行うことができる。また、無地部を設けてエキス
パンドメタルを形成することにより、薄いエキスパンド
メタルでも所要の強度を得ることができ、正負極を製造
する工程における搬送時や圧延時に加わる引っ張りに耐
える強度を得ることができる。また、集電体が薄く微細
なラス目を設けて形成されることにより、集電性や放電
特性が向上し、電池の軽量化と共に活物質層を増加させ
ることによる電池容量の増大を図ることができる。According to this structure, the uncoated portion formed in the expanded metal is cut out so as to be a lead connection portion to form a current collector, so that the lead connection portion has no lath opening. When this lead connection portion is connected between the same poles and welded to connect the leads, there is no opening, so that the weldability is good and the joining by welding can be reliably performed. Further, by providing the uncoated portion and forming the expanded metal, it is possible to obtain a required strength even with a thin expanded metal, and it is possible to obtain a strength that can withstand a tensile force applied during transport or rolling in the process of manufacturing the positive and negative electrodes. . In addition, the current collector is formed by providing a thin and fine lattice, thereby improving current collection and discharge characteristics, and increasing the battery capacity by increasing the active material layer while reducing the weight of the battery. Can be.
【００１０】上記構成において、幅方向の中央部分及び
両側部分の長尺方向に無地部が形成されたエキスパンド
メタルを用いて構成することにより、引っ張り強度が幅
方向に均等化されるので、搬送時や圧延時に変形するこ
とが抑制され、中央部分の無地部をリード接続部として
効率よく集電体を切り出すことができる。[0010] In the above structure, the tensile strength is equalized in the width direction by using expanded metal in which the uncoated portion is formed in the longitudinal direction at the center portion and both side portions in the width direction. And deformation during rolling is suppressed, and the current collector can be efficiently cut out using the uncoated portion in the center portion as a lead connection portion.
【００１１】また、エキスパンドメタルがアルミニウム
または銅のシートを用いて形成することにより、電池正
極の集電体としてアルミニウム製シート、電池負極の集
電体として銅製シートを利用することができる。Further, by forming the expanded metal using an aluminum or copper sheet, it is possible to use an aluminum sheet as a current collector of the battery positive electrode and a copper sheet as a current collector of the battery negative electrode.
【００１２】また、エキスパンドメタルに形成されたラ
ス目が、短手側の寸法が０．５〜２．０ｍｍの菱形に形
成することにより、より小型で高性能な電池を構成する
ための微細なラス目構造のエキスパンドメタルを製造す
ることができ、活物質との距離が均等化されるため放電
特性がよく集電性のよい集電体を形成することができ
る。The lath formed on the expanded metal is formed into a rhombus having a short side dimension of 0.5 to 2.0 mm, so that a finer and finer structure for forming a smaller and higher performance battery can be obtained. An expanded metal having a lath structure can be manufactured, and the distance to the active material is equalized, so that a current collector having good discharge characteristics and good current collection properties can be formed.
【００１３】[0013]
【発明の実施の形態】以下、添付図面を参照して本発明
の一実施形態について説明し、本発明の理解に供する。
尚、以下に示す実施形態は本発明を具体化した一例であ
って、本発明の技術的範囲を限定するものではない。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The embodiment described below is an example embodying the present invention, and does not limit the technical scope of the present invention.
【００１４】図１は、本実施形態に係るポリマー電解質
二次電池の正極または負極の集電体として用いるエキス
パンドメタルの構成と、このエキスパンドメタルから集
電体を切り出す方法を示している。FIG. 1 shows a configuration of an expanded metal used as a current collector of a positive electrode or a negative electrode of a polymer electrolyte secondary battery according to the present embodiment, and a method of cutting out a current collector from the expanded metal.
【００１５】エキスパンドメタル２０は、正極集電体１
ａとして用いる場合にはアルミニウム、負極集電体２ａ
として用いる場合には銅の金属シートを加工して製造さ
れる。この金属シートは、本実施形態のポリマー電解質
二次電池のように小型、軽量の電池として構成する場合
に、集電体の厚さはより薄いものであることが要求さ
れ、本実施形態においては０．０６ｍｍの金属シートが
採用されている。The expanded metal 20 is composed of the positive electrode current collector 1
When used as a, aluminum, the negative electrode current collector 2a
When it is used as a metal, it is manufactured by processing a copper metal sheet. When the metal sheet is configured as a small and lightweight battery like the polymer electrolyte secondary battery of the present embodiment, the current collector is required to have a smaller thickness. A 0.06 mm metal sheet is employed.
【００１６】図２（ａ）に示すように、長尺の金属シー
トにスリットａを断続的に且つ千鳥状に形成すると共
に、図２（ｂ）に示すように、スリット形成時にシート
の表裏に交互に突出する膨出部ｄが形成される。このス
リットａ及び膨出部ｄが形成された金属シートを、図３
に示すように、幅方向が拡張するように展伸させること
により、菱形の開口部を囲む線状部ｃが結節部ｂで連結
されたラス目を有するメッシュシートが形成される。こ
のメッシュシートを両面から圧延することによりエキス
パンドメタル２０が製造される。As shown in FIG. 2A, slits a are formed intermittently and in a zigzag pattern in a long metal sheet, and as shown in FIG. The bulges d that protrude alternately are formed. The metal sheet on which the slit a and the bulging portion d are formed is shown in FIG.
As shown in (1), a mesh sheet having a lath in which the linear portions c surrounding the rhombic openings are connected by the knot portions b is formed by expanding the width direction. The expanded metal 20 is manufactured by rolling this mesh sheet from both sides.
【００１７】本実施形態に係る正極または負極の集電体
に採用されるエキスパンドメタル２０は、図示するよう
に、その幅方向の中央部分と両側部分とにラス目が形成
されない無地部２２を設けるために、金属シートの中央
部分と両側部分とにスリットが形成されないように、こ
の部分にはスリット形成するカッターが配置されない。
このようにスリット形成しない部分を設けて製造された
エキスパンドメタル２０は、図１に示すように、中央部
分と両側部分とに無地部２２が形成され、その他の部分
がラス部２１として形成される。The expanded metal 20 used for the current collector of the positive electrode or the negative electrode according to the present embodiment has a plain portion 22 in which laths are not formed at the center portion and both side portions in the width direction as shown in the figure. Therefore, a cutter for forming a slit is not arranged in this portion so that no slit is formed in the central portion and both side portions of the metal sheet.
As shown in FIG. 1, the expanded metal 20 manufactured by providing the portion where the slit is not formed has the uncoated portion 22 formed at the center portion and both side portions, and the other portion is formed as the lath portion 21. .
【００１８】このように形成されたエキスパンドメタル
２０を用いて、図６に示したようなポリマー電解質二次
電池を製造する手順について以下に簡単に説明する。A procedure for manufacturing a polymer electrolyte secondary battery as shown in FIG. 6 using the expanded metal 20 thus formed will be briefly described below.
【００１９】まず、正極１を作成するために、アルミニ
ウム製の金属シートを用いて作成されたエキスパンドメ
タル２０に結着材が塗着される。この正極集電体１ａと
するエキスパンドメタル２０のラス部２１上に、ペース
ト状の正極活物質１ｂを塗着させ、乾燥させた後、圧延
して所定厚さ（０．１５ｍｍ）の正極シートを作成す
る。First, in order to form the positive electrode 1, a binder is applied to an expanded metal 20 formed using a metal sheet made of aluminum. A paste-like positive electrode active material 1b is applied on the lath portion 21 of the expanded metal 20 serving as the positive electrode current collector 1a, dried, and then rolled to form a positive electrode sheet having a predetermined thickness (0.15 mm). create.
【００２０】また、負極２を作成するために、銅製の金
属シートを用いて作成されたエキスパンドメタル２０に
結着材が塗着される。この負極集電体２ａとするエキス
パンドメタル２０のラス部２１の両面に、ペースト状の
負極活物質２ｂを塗着させ、乾燥させた後、圧延して所
定厚さ（０．３２ｍｍ）の負極シートを作成する。In order to form the negative electrode 2, a binder is applied to an expanded metal 20 formed using a copper metal sheet. A paste-like negative electrode active material 2b is applied to both surfaces of the lath portion 21 of the expanded metal 20 serving as the negative electrode current collector 2a, dried, and then rolled to obtain a negative electrode sheet having a predetermined thickness (0.32 mm). Create
【００２１】前記正極シート及び負極シートは、エキス
パンドメタル２０が活物質塗着工程に搬送され、あるい
は活物質の塗着後に圧延工程に搬送され圧延される際
に、搬送方向に引っ張り力が加わるが、無地部１２が設
けられていることにより、無地部１２のない従来構造に
比して格段に引っ張り強度が向上するため、破断や引っ
張り方向への伸びがなくなり、また、圧延時の活物質に
対する集電体の追従性が向上するため、高品質の正極シ
ート及び負極シートが製造される。When the expanded metal 20 is conveyed to the active material application step or conveyed to the rolling step after application of the active material and rolled, a tensile force is applied to the positive electrode sheet and the negative electrode sheet in the conveying direction. Since the uncoated portion 12 is provided, the tensile strength is remarkably improved as compared with the conventional structure having no uncoated portion 12, so that breakage and elongation in the tensile direction are eliminated, and the active material at the time of rolling is reduced. Since the followability of the current collector is improved, a high-quality positive electrode sheet and negative electrode sheet are manufactured.
【００２２】上記のように作成された正極シートは、図
１に示すように、エキスパンドメタル２０の無地部１２
にリード接続部１ｃが位置するように正極１の形状に切
り出される。図示するように中央の無地部２２の両側の
ラス部２１、２１からそれぞれ切り出される正極１のリ
ード接続部１ｃ、２ｃがそれぞれ中央の無地部２２から
切り出されるようにすることにより、材料取りに無駄の
少ない切り出しを行うことができる。負極シートの場合
も同様に無地部２２にリード接続部２ｃが位置するよう
に負極２の形状に切り出される。As shown in FIG. 1, the positive electrode sheet prepared as described above is made of a solid portion 12 of expanded metal 20.
Is cut out in the shape of the positive electrode 1 so that the lead connection portion 1c is located at the right side. As shown in the figure, the lead connection portions 1c and 2c of the positive electrode 1 cut out from the lath portions 21 and 21 on both sides of the center uncoated portion 22 are cut out from the center uncoated portion 22, respectively. Can be cut out with less noise. Similarly, in the case of the negative electrode sheet, the negative electrode sheet is cut into the shape of the negative electrode 2 so that the lead connection portion 2c is located in the uncoated portion 22.
【００２３】この正極１と負極２とは、セパレータ３を
介して積層され、加熱されたローラ間で加熱、加圧され
ることにより、それぞれの対面間が熱融着により接合し
て一体化された積層電極４として形成される。この積層
電極４の２枚の正極集電体１ａ、１ａの各リード接続部
１ｃは、正極リード８と共に溶接により接続される。The positive electrode 1 and the negative electrode 2 are stacked with a separator 3 interposed therebetween, and are heated and pressed between heated rollers, so that their facing surfaces are joined by heat fusion to be integrated. It is formed as a laminated electrode 4. Each lead connection portion 1c of the two positive electrode current collectors 1a and 1a of the laminated electrode 4 is connected together with the positive electrode lead 8 by welding.
【００２４】また、負極集電体２ａのリード接続部２ｃ
には、負極リード９が溶接により接続される。各リード
接続部１ｃ、２ｃは、前記のようにエキスパンドメタル
２０の無地部２２に形成されるので、ラス目の開口部が
ないため、抵抗溶接または超音波溶接を行う際の溶接が
確実になされる。また、各リード８、９への接続性に優
れ、集電体本体部への導電断面積が大きくなるため強電
流の取り出しが可能となる。The lead connecting portion 2c of the negative electrode current collector 2a
Is connected to the negative electrode lead 9 by welding. Since each lead connection portion 1c, 2c is formed in the uncoated portion 22 of the expanded metal 20 as described above, since there is no opening in the lath, welding at the time of performing resistance welding or ultrasonic welding is reliably performed. You. In addition, since the connection to the leads 8 and 9 is excellent, and the conductive cross-sectional area to the current collector body is increased, a strong current can be taken out.
【００２５】各リード８、９が接続された積層電極４
は、図６に示すようにラミネートシートを折り曲げ線Ｔ
で二つ折りにしてシール部Ｐ1 、Ｐ3 で熱融着によりシ
ールされて封筒状に形成された外装ケース７内に挿入さ
れ、外装ケース７内に所定量の電解液が注入された後、
シール部Ｐ2 が熱融着によりシールされることにより外
装ケース７内に封入され、ポリマー電解質二次電池とし
て完成される。The laminated electrode 4 to which the leads 8 and 9 are connected
Folds the laminate sheet as shown in FIG.
After being inserted into the outer case 7 formed into an envelope by being sealed by heat sealing at the seal portions P 1 and P 3 , a predetermined amount of electrolyte is injected into the outer case 7,
Seal portion P 2 is enclosed in an outer casing 7 by being sealed by thermal fusion is completed as a polymer electrolyte secondary battery.
【００２６】以上説明したように構成されるポリマー電
解質二次電池の集電体１ａ、２ａとして使用されるエキ
スパンドメタル２０の構成と、電池性能との関連につい
て次に説明する。Next, the relationship between the configuration of the expanded metal 20 used as the current collectors 1a and 2a of the polymer electrolyte secondary battery configured as described above and the battery performance will be described.
【００２７】上記構成に示したような小型、軽量の非水
電解質電池の集電体１ａ、２ａとして使用するエキスパ
ンドメタル２０の厚さは、電池重量及び厚さに直接的に
影響するため、電池性能や製造工程に影響しない範囲で
極力薄いことが要求される。The thickness of the expanded metal 20 used as the current collectors 1a and 2a of the small and lightweight non-aqueous electrolyte battery as described above directly affects the battery weight and thickness. It is required to be as thin as possible without affecting the performance and manufacturing process.
【００２８】また、集電体１ａ、２ａの厚さが薄いほど
同一厚さの極板を作成する活物質１ｂ、２ｂの厚さを増
すことができ、厚さが同じでも電池容量を大きくするこ
とができる。従って、エキスパンドメタル２０はその厚
さのより薄いものを使用することが望まれるが、機械的
強度の限界から０．１ｍｍ以下のものを使用することは
困難であったが、上記したように無地部２２を設けた構
造により０．１ｍｍ以下（本実施形態の例では０．０６
ｍｍ）のものの使用を可能とした。Further, as the thickness of the current collectors 1a and 2a is smaller, the thickness of the active materials 1b and 2b for forming the electrode plates having the same thickness can be increased, and the battery capacity is increased even if the thickness is the same. be able to. Therefore, it is desirable to use the expanded metal 20 having a smaller thickness, but it is difficult to use the expanded metal 20 having a thickness of 0.1 mm or less due to the limit of mechanical strength. 0.1 mm or less (0.06 in the example of the present embodiment) due to the structure in which the portion 22 is provided.
mm).
【００２９】また、図４（ａ）に示すように形成された
エキスパンドメタル２０のラス目は、微細に形成するほ
ど集電体１ａ、２ａと活物質１ｂ、２ｂとの距離が均等
化されるため、電池の放電特性を向上させることができ
るが、ラス目を形成するために金属シートにスリット形
成するカッターの加工限界がある。また、ラス目として
形成される菱形の形状は、図４（ｂ）に示すように、菱
形の対角線の長対角ＬＷと短対角ＳＷとの比率は略２：
１となるように形成することが望ましく、活物質との接
合性や電池の放電特性を向上させることができる。ま
た、ラス目の格子幅（線状部）Ｄも細くするほど集電性
は向上するが、圧延時に耐える強度を得るためにも前記
カッターの加工限界からも０．１ｍｍが限界となる。エ
キスパンドメタル２０のラス目をより微細に形成して電
池性能を向上させ、且つ製造上の強度を保ために、上記
したように無地部２２を設けることが有効である。この
無地部２２を設けたエキスパンドメタル２０を製造する
ために、図５に示すように、金属シートを展伸してメッ
シュシートとした後、無地部２２に幅方向に凹部を形成
したノッチ２４を形成することにより、圧延時のラス部
２１と無地部２２との伸びを一致させ、エキスパンドメ
タル２０の変形を防止し、微細形成されたラス目を均一
に形成することができる。The distance between the current collectors 1a and 2a and the active materials 1b and 2b is equalized as the lath of the expanded metal 20 formed as shown in FIG. Therefore, the discharge characteristics of the battery can be improved, but there is a processing limit of a cutter for forming a slit in a metal sheet to form a lath. Further, as shown in FIG. 4B, the shape of the rhombus formed as the lath is such that the ratio of the long diagonal LW to the short diagonal SW of the diagonal of the rhombus is approximately 2:
1 is desirably formed so that the bonding property with the active material and the discharge characteristics of the battery can be improved. Also, the thinner the lattice width (linear portion) D of the lath, the better the current collecting property. However, in order to obtain strength that can withstand the rolling, the working limit of the cutter is limited to 0.1 mm. In order to improve the battery performance by forming the lattice of the expanded metal 20 finer and to maintain the strength in manufacturing, it is effective to provide the uncoated portion 22 as described above. In order to manufacture the expanded metal 20 provided with the uncoated portion 22, as shown in FIG. 5, a metal sheet is stretched into a mesh sheet, and a notch 24 in which a recess is formed in the uncoated portion 22 in the width direction is formed. By forming, the elongation of the lath part 21 and the uncoated part 22 at the time of rolling are matched, the deformation of the expanded metal 20 is prevented, and the finely formed lath can be formed uniformly.
【００３０】[0030]
【発明の効果】以上の説明の通り本発明によれば、電池
の集電体を微細なラス目構造が形成された薄いエキスパ
ンドメタルを用いて形成することができるので、非水電
解質電池に要求される小型薄型化、軽量化、更には高性
能化の要求に答えることができる。As described above, according to the present invention, the current collector of the battery can be formed by using a thin expanded metal having a fine lath structure. It is possible to meet the demands for smaller, thinner, lighter, and higher performance.
【図１】本発明の実施形態に係るエキスパンドメタルの
構成と集電体の切り出し状態を示す平面図。FIG. 1 is a plan view showing a configuration of an expanded metal and a cut-out state of a current collector according to an embodiment of the present invention.
【図２】金属シートに対するスリット形成を説明する
（ａ）は平面図、（ｂ）は断面図。2 (a) is a plan view and FIG. 2 (b) is a cross-sectional view for explaining slit formation on a metal sheet.
【図３】エキスパンドメタルの製造方法を示す平面図。FIG. 3 is a plan view showing a method of manufacturing an expanded metal.
【図４】エキスパンドメタルの（ａ）は部分拡大図、
（ｂ）はラス目の拡大図。FIG. 4 (a) is a partially enlarged view of expanded metal,
(B) is an enlarged view of a lath.
【図５】エキスパンドメタルのノッチ形成を示す（ａ）
は平面図、（ｂ）は断面図。FIG. 5 shows notch formation of expanded metal (a).
Is a plan view, and (b) is a sectional view.
【図６】ポリマー電解質電池の構成を示す平面図。FIG. 6 is a plan view showing a configuration of a polymer electrolyte battery.
【図７】同図のＡ−Ａ線矢視断面図。FIG. 7 is a sectional view taken along the line AA of FIG.
１ 正極 １ａ 正極集電体 １ｂ 正極活物質 １ｃ、２ｃ リード接続部 ２ 負極 ２ａ 負極集電体 ２ｂ 負極活物質 ３ セパレータ ８ 正極リード ９ 負極リード ２０ エキスパンドメタル ２１ ラス部 ２２ 無地部 DESCRIPTION OF SYMBOLS 1 Positive electrode 1a Positive electrode current collector 1b Positive electrode active material 1c, 2c Lead connection part 2 Negative electrode 2a Negative electrode current collector 2b Negative electrode active material 3 Separator 8 Positive electrode lead 9 Negative electrode lead 20 Expanded metal 21 Las part 22 Solid part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中塚 三郎 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Saburo Nakatsuka 1006 Kazuma Kadoma, Kadoma, Osaka Matsushita Electric Industrial
Claims (4)
集電体に活物質を塗着して正極及び負極を形成し、これ
ら両極を電解質層を介して積層し、電解液と共に外装ケ
ース内に封入すると共に、両電極それぞれの前記集電体
のリード接続部位に接続したリードを前記外装ケース外
に引き出して電池の正電極及び負電極を形成してなる非
水電解質電池において、 前記エキスパンドメタルが、厚さ０．１ｍｍ以下の長尺
金属シートを用いて、その幅方向の任意部分に長尺方向
にラス目が形成されない無地部を設けて形成されてな
り、このエキスパンドメタルから前記リード接続部位が
前記無地部に位置するように切り出した集電体を用いて
正極及び負極が形成されてなることを特徴とする非水電
解質電池。An active material is applied to a current collector formed by using an expanded metal to form a positive electrode and a negative electrode. These two electrodes are laminated via an electrolyte layer, and sealed in an outer case together with an electrolytic solution. In addition, in a non-aqueous electrolyte battery formed by forming a positive electrode and a negative electrode of a battery by drawing a lead connected to a lead connection portion of the current collector of each of the two electrodes to the outside of the outer case, It is formed by using a long metal sheet having a thickness of 0.1 mm or less, and providing a solid portion where no lath is formed in the long direction at an arbitrary portion in the width direction, and the lead connection portion is formed from the expanded metal. A nonaqueous electrolyte battery, wherein a positive electrode and a negative electrode are formed using a current collector cut out so as to be located in the uncoated portion.
向に無地部が形成されたエキスパンドメタルを用いて構
成されてなる請求項１記載の非水電解質電池。2. The non-aqueous electrolyte battery according to claim 1, wherein the non-aqueous electrolyte battery is formed by using an expanded metal in which a solid portion is formed in a longitudinal direction of a central portion and both side portions in a width direction.
は銅のシートを用いて形成されてなる請求項１または２
記載の非水電解質電池。3. The expanded metal is formed by using an aluminum or copper sheet.
The nonaqueous electrolyte battery according to any one of the preceding claims.
が、短手側の寸法が０．５〜２．０ｍｍの菱形に形成さ
れてなる請求項１〜３記載の非水電解質電池。4. The nonaqueous electrolyte battery according to claim 1, wherein the laths formed on the expanded metal are formed in a rhombus shape having a short side dimension of 0.5 to 2.0 mm.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06266298A JP3371085B2 (en) | 1998-03-13 | 1998-03-13 | Non-aqueous electrolyte battery |
| US09/260,779 US6202271B1 (en) | 1998-03-13 | 1999-03-02 | Method and apparatus for manufacturing expanded mesh sheet and battery using this expanded mesh sheet |
| DE69920080T DE69920080T2 (en) | 1998-03-13 | 1999-03-09 | Method and apparatus for shaping expanded metal and use of this expanded metal in a battery |
| EP99301770A EP0941781B1 (en) | 1998-03-13 | 1999-03-09 | Method and apparatus for manufacturing expanded mesh sheet and battery using this expanded mesh sheet |
| CNB991036794A CN1156040C (en) | 1998-03-13 | 1999-03-10 | Method and device for making extension net slice and battery using the extension net slice |
| CA002265288A CA2265288C (en) | 1998-03-13 | 1999-03-11 | Method and apparatus for manufacturing expanded mesh sheet and battery using this expanded mesh sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06266298A JP3371085B2 (en) | 1998-03-13 | 1998-03-13 | Non-aqueous electrolyte battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11260418A true JPH11260418A (en) | 1999-09-24 |
| JP3371085B2 JP3371085B2 (en) | 2003-01-27 |
Family
ID=13206741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06266298A Expired - Fee Related JP3371085B2 (en) | 1998-03-13 | 1998-03-13 | Non-aqueous electrolyte battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3371085B2 (en) |
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|---|---|---|---|---|
| JP2002063896A (en) * | 2000-08-22 | 2002-02-28 | Matsushita Electric Ind Co Ltd | Hydrogen storage alloy electrode and alkaline battery using the same |
| KR100359613B1 (en) * | 2000-10-10 | 2002-11-07 | 삼성테크윈 주식회사 | Current collector and the fabrication method thereof for secondary battery |
| JP2005149980A (en) * | 2003-11-18 | 2005-06-09 | Japan Vilene Co Ltd | Current collector with terminal, electrochemical element using this |
| US6979517B2 (en) | 2000-04-28 | 2005-12-27 | Matsushita Electric Industrial Co., Ltd. | Electrode plate for cell and method for manufacturing the same |
| KR100627340B1 (en) * | 2005-03-25 | 2006-09-25 | 삼성에스디아이 주식회사 | Electrodes assembly, secondary battery and module thereof |
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1998
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|---|---|---|---|---|
| US6979517B2 (en) | 2000-04-28 | 2005-12-27 | Matsushita Electric Industrial Co., Ltd. | Electrode plate for cell and method for manufacturing the same |
| JP2002063896A (en) * | 2000-08-22 | 2002-02-28 | Matsushita Electric Ind Co Ltd | Hydrogen storage alloy electrode and alkaline battery using the same |
| KR100359613B1 (en) * | 2000-10-10 | 2002-11-07 | 삼성테크윈 주식회사 | Current collector and the fabrication method thereof for secondary battery |
| JP2005149980A (en) * | 2003-11-18 | 2005-06-09 | Japan Vilene Co Ltd | Current collector with terminal, electrochemical element using this |
| KR100627340B1 (en) * | 2005-03-25 | 2006-09-25 | 삼성에스디아이 주식회사 | Electrodes assembly, secondary battery and module thereof |
| KR100919389B1 (en) * | 2006-10-02 | 2009-09-29 | 주식회사 엘지화학 | Process for Preparation of Secondary Battery of Improved Safety |
| KR100914108B1 (en) | 2007-05-03 | 2009-08-27 | 삼성에스디아이 주식회사 | Electrode assembly and rechargeable battery with the same |
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| JP2011119262A (en) * | 2009-12-07 | 2011-06-16 | Samsung Sdi Co Ltd | Secondary battery |
| US8557417B2 (en) | 2009-12-07 | 2013-10-15 | Samsung Sdi Co., Ltd. | Secondary battery |
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| KR20170006437A (en) * | 2015-07-08 | 2017-01-18 | 주식회사 엘지화학 | Method of Manufacturing Electrode Plate Using Electrode Sheet Including Notching Part at Center |
| KR20190040799A (en) * | 2017-10-11 | 2019-04-19 | 주식회사 엘지화학 | Anode Assembly consisting of lithium metal anode and tab |
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