JPH1126008A - Electrode structure of battery - Google Patents
Electrode structure of batteryInfo
- Publication number
- JPH1126008A JPH1126008A JP9173955A JP17395597A JPH1126008A JP H1126008 A JPH1126008 A JP H1126008A JP 9173955 A JP9173955 A JP 9173955A JP 17395597 A JP17395597 A JP 17395597A JP H1126008 A JPH1126008 A JP H1126008A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- electrode plate
- tab
- plate
- separator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池の電極構造に
関し、とくに、電極タブの接続部分を独特の構造とする
電極構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode structure for a battery, and more particularly to an electrode structure having a unique connection portion for an electrode tab.
【０００２】[0002]
【従来の技術】電池ケースに挿入される正極板と負極板
は、外部に電流を取り出すために電極タブを接続してい
る。電極タブは、正極板と負極板の芯体に接続される。
図１は、芯体に電極タブを接続する従来の電極構造の概
略断面図である。2. Description of the Related Art A positive electrode plate and a negative electrode plate inserted into a battery case are connected to electrode tabs for extracting a current to the outside. The electrode tab is connected to the cores of the positive electrode plate and the negative electrode plate.
FIG. 1 is a schematic sectional view of a conventional electrode structure for connecting an electrode tab to a core.
【０００３】この図に示す電極構造は、正極板である第
１電極板１と、負極板である第２電極板２をセパレータ
３を介して渦巻状に巻いて積層している。電極は、角型
電池に内蔵するために、外形を長方形としている。この
形状の電極構造は、渦巻状に巻いた後、プレスして長方
形にできる。In the electrode structure shown in FIG. 1, a first electrode plate 1 serving as a positive electrode plate and a second electrode plate 2 serving as a negative electrode plate are spirally wound with a separator 3 interposed therebetween. The electrodes have a rectangular outer shape in order to be built in a prismatic battery. The electrode structure of this shape can be formed into a rectangular shape by being spirally wound and then pressed.
【０００４】電極は、第１電極板１と第２電極板２の巻
き始め部分に、正極タブである第１電極タブ４と、負極
タブである第２電極タブ５を接続している。第１電極タ
ブと第２電極タブは、図示しないが、外装缶の開口部を
閉塞する封口板に、互いに絶縁して設けられている正極
と負極に、スポット溶接などの方法で電気的に接続され
る。The electrodes are connected to a first electrode tab 4 serving as a positive electrode tab and a second electrode tab 5 serving as a negative electrode tab at the beginning of winding of the first electrode plate 1 and the second electrode plate 2. Although not shown, the first electrode tab and the second electrode tab are electrically connected to a positive electrode and a negative electrode which are provided insulated from each other on a sealing plate closing an opening of the outer can by a method such as spot welding. Is done.
【０００５】図の電極構造は、第１電極タブ４を、Ｕ極
している第１電極板１の先端縁に沿って固定している。
第２電極タブ５は、第２電極板２の先端部分に固定して
いる。第１電極タブ４は、第１電極板１をＵ極してその
両面を第１電極板で被覆している。第２電極タブ５は、
図において、上面を第１電極板と対向させている。第１
電極板１と対向する第２電極タブ５は、間に配設される
セパレータ３で絶縁される。ただ、第２電極タブ５は第
２電極板２から突出しているので、これがセパレータ３
を突き破って第１電極板１に接触すると内部ショートす
る。第２電極タブ５が第１電極板１に接触するショート
を防止するために、第２電極タブ５の表面に保護テープ
６を張設している。保護テープ６は、第２電極タブ５の
表面を被覆して、互いに対向して配設される第２電極タ
ブ５と第１電極板１の内部ショートを防止する。In the illustrated electrode structure, the first electrode tab 4 is fixed along the leading edge of the first electrode plate 1 having a U-pole.
The second electrode tab 5 is fixed to the tip of the second electrode plate 2. The first electrode tab 4 has the U-pole of the first electrode plate 1 and covers both surfaces thereof with the first electrode plate. The second electrode tab 5 is
In the figure, the upper surface is opposed to the first electrode plate. First
The second electrode tab 5 facing the electrode plate 1 is insulated by the separator 3 disposed therebetween. However, since the second electrode tab 5 protrudes from the second electrode plate 2, this is
Pierce through the first electrode plate 1 and short-circuit internally. A protection tape 6 is stretched on the surface of the second electrode tab 5 in order to prevent a short circuit in which the second electrode tab 5 contacts the first electrode plate 1. The protective tape 6 covers the surface of the second electrode tab 5 to prevent an internal short circuit between the second electrode tab 5 and the first electrode plate 1 which are disposed to face each other.
【０００６】[0006]
【発明が解決しようとする課題】図１に示す電極構造
は、保護テープ６を正確な位置に確実に接着するのが難
しい欠点がある。それは、段差のある第２電極タブ５と
第２電極板２の表面に保護テープ６を接着するからであ
る。また、この電極構造は、図２の矢印で示すように、
保護テープ６のブリッジとなって接着されない部分がセ
パレータ３に押されると、第２電極タブ５の隅角で破損
しやすい欠点もある。この部分が破断しやすいのは、ブ
リッジ部分の両側を、第２電極タブ５と第２電極板２に
接着して固定しているからである。両側を固定して、ブ
リッジとなって浮いている部分は、裏面に支持部分がな
いので、押されると第２電極タブ５の隅角で破断しやす
くなる。The electrode structure shown in FIG. 1 has a disadvantage that it is difficult to securely adhere the protective tape 6 to a correct position. This is because the protective tape 6 is adhered to the surface of the second electrode tab 5 having the step and the second electrode plate 2. Further, as shown by the arrow in FIG.
If a portion of the protective tape 6 that is not bonded as a bridge is pressed by the separator 3, there is a disadvantage that the second electrode tab 5 is easily damaged at a corner thereof. This portion is easily broken because both sides of the bridge portion are adhered and fixed to the second electrode tab 5 and the second electrode plate 2. The portion floating as a bridge with both sides fixed has no supporting portion on the back surface, so that when pressed, the portion is easily broken at the corner of the second electrode tab 5.
【０００７】本発明は、このような欠点を解決すること
を目的に開発されたものである。本発明の重要な目的
は、保護テープを簡単かつ容易に、しかも定位置にずれ
ないように接着して、しかも、対向する電極タブと極板
との電気接触を有効に防止できる電池の電極構造を提供
することにある。[0007] The present invention has been developed for the purpose of solving such disadvantages. An important object of the present invention is to provide a battery electrode structure which can easily and easily adhere a protective tape so as not to be displaced to a fixed position, and can effectively prevent electrical contact between an opposed electrode tab and an electrode plate. Is to provide.
【０００８】[0008]
【課題を解決するための手段】本発明の電極構造は、第
１電極板１と第２電極板２を、セパレータ３を介在させ
て積層して渦巻状に巻いている。第１電極板１には第１
電極タブ４を、第２電極板２には第２電極タブ５を接続
している。第２電極タブ５は、セパレータ３を介して第
１電極板１に対向している。互いに対向している第２電
極タブ５と第１電極板１の間には、保護テープ６を配設
している。According to the electrode structure of the present invention, a first electrode plate 1 and a second electrode plate 2 are stacked with a separator 3 interposed therebetween and spirally wound. The first electrode plate 1 has the first
The electrode tab 4 is connected to the electrode tab 4 and the second electrode tab 5 is connected to the second electrode plate 2. The second electrode tab 5 faces the first electrode plate 1 via the separator 3. A protective tape 6 is provided between the second electrode tab 5 and the first electrode plate 1 facing each other.
【０００９】さらに、本発明の電極構造は、保護テープ
６を、第１電極板１の芯体表面であって、第２電極タブ
５との対向面に接着している。第１電極板１は、表面に
接着された保護テープ６とセパレータ３を介して、第２
電極板２の第２電極タブ５から絶縁されてなることを特
徴とする。Further, in the electrode structure of the present invention, the protective tape 6 is adhered to the surface of the core of the first electrode plate 1 and the surface facing the second electrode tab 5. The first electrode plate 1 is connected to the second electrode plate via the protective tape 6 and the separator 3 adhered to the surface.
It is characterized by being insulated from the second electrode tab 5 of the electrode plate 2.
【００１０】本発明の請求項２の電極構造は、第１電極
板１の芯体を金属箔とし、請求項３の電極構造は、第１
電極板１の芯体の先端部をＵ曲し、Ｕ曲された内側に第
１電極タブ４を固定している。In the electrode structure according to a second aspect of the present invention, the core of the first electrode plate is made of metal foil, and the electrode structure in the third aspect is the first electrode plate.
The front end of the core of the electrode plate 1 is bent in a U-shape, and the first electrode tab 4 is fixed inside the U-shaped bend.
【００１１】さらに、本発明の請求項４の電極構造は、
第１電極板１を正極板とし、第２電極板２を負極板とし
ている。Further, the electrode structure according to claim 4 of the present invention,
The first electrode plate 1 is a positive electrode plate, and the second electrode plate 2 is a negative electrode plate.
【００１２】また、本発明の請求項５に記載される電極
構造は、セパレータ３を介して互いに積層された第１電
極板１と第２電極板２を、細長い形状に巻いている。In the electrode structure according to a fifth aspect of the present invention, the first electrode plate 1 and the second electrode plate 2 stacked on each other with the separator 3 interposed therebetween are wound in an elongated shape.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施例を図面に基
づいて説明する。ただし、以下に示す実施例は、本発明
の技術思想を具体化するための電極構造を例示するもの
であって、本発明は電極構造を下記のものに特定しな
い。Embodiments of the present invention will be described below with reference to the drawings. However, the following examples illustrate an electrode structure for embodying the technical idea of the present invention, and the present invention does not specify the electrode structure as follows.
【００１４】さらに、この明細書は、特許請求の範囲を
理解しやすいように、実施例に示される部材に対応する
番号を、「特許請求の範囲の欄」、および「課題を解決
するための手段の欄」に示される部材に付記している。
ただ、特許請求の範囲に示される部材を、実施例の部材
に特定するものでは決してない。Further, in this specification, in order to make it easier to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”.
However, the members described in the claims are not limited to the members of the embodiments.
【００１５】電極体は、第１電極板と、第２電極板を、
セパレータを介して積層し、これを渦巻状に巻いて、細
長い形状にプレスして製作される。このようにして製作
された電極体は、図３の断面図に示すように、角型の外
装缶７に挿入されて電池となる。電池は、渦巻状の電極
体８を外装缶７に挿入した後、電解液を充填し、外装缶
７の開口部を封口板９で気密に密閉して製造される。封
口板９は、外装缶７の開口部を閉塞する前工程で、電極
体８から上方に突出する電極タブを接続する。The electrode body comprises a first electrode plate and a second electrode plate,
It is manufactured by laminating through a separator, winding it spirally, and pressing it into an elongated shape. The electrode body manufactured in this manner is inserted into a rectangular outer can 7, as shown in the sectional view of FIG. 3, to form a battery. The battery is manufactured by inserting the spiral electrode body 8 into the outer can 7, filling the battery with an electrolytic solution, and hermetically sealing the opening of the outer can 7 with a sealing plate 9. The sealing plate 9 connects an electrode tab projecting upward from the electrode body 8 in a step before closing the opening of the outer can 7.
【００１６】電極体８の巻き始め部分を、図４と図５に
示す。ただし、図５は、第１電極板１と第２電極板２を
絶縁するセパレータを図示していない。FIGS. 4 and 5 show a winding start portion of the electrode body 8. However, FIG. 5 does not show a separator for insulating the first electrode plate 1 and the second electrode plate 2.
【００１７】これ等の図に示す電極構造は、第１電極板
１に第１電極タブ４を、第２電極板２に第２電極タブ５
をスポット溶接して固定している。第１電極タブ４と第
２電極タブ５は、金属箔や薄い金属板を帯状に裁断した
もので、電極体８の第１電極板１と第２電極板２を、封
口板９に互いに絶縁して設けられた電極端子に接続す
る。In the electrode structure shown in these figures, a first electrode tab 4 is provided on a first electrode plate 1 and a second electrode tab 5 is provided on a second electrode plate 2.
Are fixed by spot welding. The first electrode tab 4 and the second electrode tab 5 are formed by cutting a metal foil or a thin metal plate into a strip shape. The first electrode plate 1 and the second electrode plate 2 of the electrode body 8 are insulated from each other by a sealing plate 9. Connected to the electrode terminal provided.
【００１８】第１電極板１は、巻き始めの先端縁に沿っ
て、第１電極タブ４を固定している。第１電極板１は、
先端部分をＵ極して折り返し、内側に第１電極タブ４を
配設している。いいかえると、第１電極タブ４の両面を
第１電極板１でカバーしている。第１電極タブ４は、両
面を第１電極板１でカバーしているので、保護テープ６
で第２電極板２と絶縁する必要はない。The first electrode plate 1 fixes the first electrode tab 4 along the leading edge at the beginning of winding. The first electrode plate 1
The front end portion is turned to the U-pole, and the first electrode tab 4 is disposed inside. In other words, both surfaces of the first electrode tab 4 are covered with the first electrode plate 1. Since the first electrode tab 4 covers both sides with the first electrode plate 1, the protection tape 6
It is not necessary to insulate the second electrode plate 2 from the second electrode plate 2.
【００１９】第１電極板１は、先端の巻き始めから離れ
た位置であって、第２電極板２に固定される第２電極タ
ブ５と対向する面に保護テープ６を接着している。保護
テープ６は、絶縁性のプラスチックテープで片面に粘着
層を設けている。保護テープ６は、粘着層を第１電極板
１の表面に接着して固定される。保護テープ６は、第２
電極タブ５の幅よりも広い。幅の広い保護テープ６は、
接着位置が第２電極タブ５との相対位置から多少ずれて
も、第２電極タブ５と第１電極板１とを絶縁できる。The first electrode plate 1 has a protective tape 6 adhered to a position away from the beginning of the winding of the tip and facing the second electrode tab 5 fixed to the second electrode plate 2. The protective tape 6 is an insulating plastic tape provided with an adhesive layer on one side. The protective tape 6 is fixed by bonding an adhesive layer to the surface of the first electrode plate 1. The protection tape 6
It is wider than the width of the electrode tab 5. The wide protective tape 6
Even if the bonding position is slightly shifted from the relative position with respect to the second electrode tab 5, the second electrode tab 5 and the first electrode plate 1 can be insulated.
【００２０】図の電極構造は、保護テープ６を第１電極
板１の芯体表面に接着している。第１電極板１の芯体
は、たとえば、アルミニウム箔等の金属箔である。金属
箔の芯体は、表面が平滑な面であるので、保護テープ６
を確実に接着できる。さらに、図の第１電極板１は、第
２電極タブ５を固定している第２電極板２の背面よりも
後方に活物質を塗布している。In the illustrated electrode structure, the protective tape 6 is adhered to the surface of the core of the first electrode plate 1. The core of the first electrode plate 1 is, for example, a metal foil such as an aluminum foil. Since the metal foil core has a smooth surface, the protective tape 6
Can be securely bonded. Further, the first electrode plate 1 shown in the figure has an active material applied to the rear of the back surface of the second electrode plate 2 to which the second electrode tab 5 is fixed.
【００２１】第２電極板２は、巻き始めとなる先端部分
に第２電極タブ５を固定している。第２電極板２は、第
１電極板１よりも後方にずらせた状態で、渦巻状に巻か
れる。図４と図５に示す電極体は、先端をＵ極している
第１電極板１を次にＵ極する部分から、第２電極板２を
巻き始めている。そして、第２電極板２は、これに固定
している第２電極タブ５を、第１電極板１に接着してい
る保護テープ６と対向させる位置に積層して、渦巻状に
巻かれる。図５は第１電極板１と第２電極板２との間に
配設するセパレータを省略しているが、第１電極板１と
第２電極板２との間には、両電極板を絶縁して積層する
セパレータを配設する。The second electrode plate 2 has a second electrode tab 5 fixed to a leading end portion where winding is started. The second electrode plate 2 is spirally wound while being shifted backward from the first electrode plate 1. In the electrode body shown in FIGS. 4 and 5, the second electrode plate 2 starts to be wound from a portion of the first electrode plate 1 having a U-pole at the tip and a U-pole next. Then, the second electrode plate 2 is laminated in a position where the second electrode tab 5 fixed thereto is opposed to the protective tape 6 adhered to the first electrode plate 1, and wound in a spiral shape. FIG. 5 omits a separator provided between the first electrode plate 1 and the second electrode plate 2, but the two electrode plates are provided between the first electrode plate 1 and the second electrode plate 2. A separator to be insulated and laminated is provided.
【００２２】本発明の電極構造は、第１電極板１を正極
板とし、第２電極板２を負極板とするリチウムイオン二
次電池の電極体とすることができる。リチウムイオン二
次電池に使用される第１電極板１の正極板と、第２電極
板２の負極板は、下記のようにして製作する。ただ、本
発明の電極構造は、リチウムイオン二次電池のみなら
ず、ニッケル−カドミウム電池やニッケル−水素電池等
の電池にも利用できる。さらに、本発明の電極構造は、
第１電極板を正極板として、第２電極板を負極板に特定
しない。たとえば、第１電極板を負極板として、第２電
極板を正極板とする電極構造にも利用できる。The electrode structure of the present invention can be used as an electrode body of a lithium ion secondary battery using the first electrode plate 1 as a positive electrode plate and the second electrode plate 2 as a negative electrode plate. The positive electrode plate of the first electrode plate 1 and the negative electrode plate of the second electrode plate 2 used in the lithium ion secondary battery are manufactured as follows. However, the electrode structure of the present invention can be used not only for a lithium ion secondary battery but also for a battery such as a nickel-cadmium battery and a nickel-hydrogen battery. Further, the electrode structure of the present invention,
The first electrode plate is not specified as a positive electrode plate, and the second electrode plate is not specified as a negative electrode plate. For example, the present invention can be applied to an electrode structure in which the first electrode plate is a negative electrode plate and the second electrode plate is a positive electrode plate.
【００２３】［第１電極板である正極板の製造工程］ 正極スラリーを作成する工程 正極活物質として、ＬｉＣｏＯ2を８５重量部、人造黒
鉛粉末を５重量部、カーボンブラック５重量部とを充分
混合した後、Ｎ−メチル−２−ピロリドンに溶かしたポ
リフッ化ビニリデン（ＰＶｄＦ）を固形分として５重量
部となるように加えて正極スラリーとする。[Manufacturing process of positive electrode plate as first electrode plate] Step of preparing positive electrode slurry As a positive electrode active material, 85 parts by weight of LiCoO 2 , 5 parts by weight of artificial graphite powder, and 5 parts by weight of carbon black are sufficiently mixed. After mixing, polyvinylidene fluoride (PVdF) dissolved in N-methyl-2-pyrrolidone is added so as to have a solid content of 5 parts by weight to obtain a positive electrode slurry.
【００２４】 正極スラリーを芯体に塗布する工程 正極スラリーを、厚さ２０μｍのアルミニウム箔である
導電性の芯体の上に両面塗布する。乾燥させた後、ロー
ラープレス機により圧延する。これを１１０℃で３時間
真空乾燥処理をして、帯状の正極板である第１電極板１
を作製する。芯体にはアルミニウム箔以外の金属板も使
用できる。さらに、芯体の厚みは、１０μｍ〜１００μ
ｍ、好ましくは１５μｍ〜５０μｍとすることもでき
る。Step of Applying Positive Electrode Slurry to Core A positive electrode slurry is applied to both sides of a conductive core which is an aluminum foil having a thickness of 20 μm. After drying, it is rolled by a roller press. This is subjected to a vacuum drying treatment at 110 ° C. for 3 hours to obtain a first electrode plate 1 which is a belt-like positive electrode plate.
Is prepared. Metal plates other than aluminum foil can be used for the core. Further, the thickness of the core is 10 μm to 100 μm.
m, preferably 15 μm to 50 μm.
【００２５】［第２電極板である負極板の製造工程］ 負極スラリーを作成する工程 負極活物質として、粒子径５〜２５μｍの天然黒鉛粉末
９５重量部（層間距離３．３５オングストローム）、Ｎ
−メチル−２−ピロリドンに溶かしたＰＶｄＦを固形分
として５重量部となるように加え、負極スラリーとす
る。[Manufacturing Step of Negative Electrode Plate as Second Electrode Plate] Step of Preparing Negative Electrode Slurry As the negative electrode active material, 95 parts by weight of natural graphite powder having a particle diameter of 5 to 25 μm (interlayer distance: 3.35 Å), N
-PVDF dissolved in -methyl-2-pyrrolidone is added to a solid content of 5 parts by weight to prepare a negative electrode slurry.
【００２６】 負極スラリーを芯体に塗布する工程 負極スラリーを、厚さ１８μｍの銅箔である導電性の芯
体の上に両面塗布する。乾燥した後、ローラープレス機
により圧延する。芯体である銅箔は、第２電極タブ５を
固定する巻き始め部分を、負極スラリーを塗布しない露
出部分とした。この露出部分に、ニッケル製の負極タブ
（幅３ｍｍ）をスポット溶接し、その後、１１０℃で３
時間真空乾燥処理して、帯状の負極板とした。芯体には
銅箔以外の金属も使用できる。さらに、芯体の膜みは１
８μｍ以外とすることもできる。Step of Applying Negative Electrode Slurry to Core A negative electrode slurry is applied to both sides of a conductive core which is a copper foil having a thickness of 18 μm. After drying, it is rolled by a roller press. In the copper foil as the core, the winding start portion for fixing the second electrode tab 5 was an exposed portion where the negative electrode slurry was not applied. A nickel negative electrode tab (3 mm in width) was spot-welded to the exposed portion,
A vacuum drying treatment was performed for a time to obtain a strip-shaped negative electrode plate. Metals other than copper foil can also be used for the core. Furthermore, the film thickness of the core body is 1
It can be other than 8 μm.
【００２７】リチウムイオン二次電池の電極体は、以上
のようにして製作された第１電極板と第２電極板を、そ
の間にセパレータを挟着し、セパレータで絶縁する状態
として円筒状に巻き取り、その後にプレスして、長方形
に成形する。セパレータは、ポリエチレン製の微多孔膜
である。ただ、セパレータには、ポリプロピレン製の微
多孔膜など、ポリオレフィン系の微多孔膜も使用でき
る。さらに、セパレータには、ポリオレフィン系の繊維
を使用した不織布セパレータも使用できる。セパレータ
の厚さは、たとえば３４μｍである。The electrode body of the lithium ion secondary battery is formed by winding the first electrode plate and the second electrode plate manufactured as described above in a cylindrical shape with a separator interposed therebetween and insulated by the separator. And then pressed to form a rectangle. The separator is a polyethylene microporous membrane. However, a polyolefin-based microporous membrane such as a polypropylene microporous membrane can also be used for the separator. Further, a non-woven fabric separator using a polyolefin fiber can be used as the separator. The thickness of the separator is, for example, 34 μm.
【００２８】電極体は、巻き終わり部分の表面に、ポリ
プロピレン製の接着テープ（図示せず）を付着して、巻
き終わりを固定する。円筒状に巻かれた電極体は、両面
をプレス機でプレスして、電極体の断面を、図４と図５
に示すように、長方形に成形する。長方形の電極体８
は、第１電極タブ４と第２電極タブ５を接続した後、外
装缶７に挿入し、注液して外装缶７の開口部を封口板９
で閉塞して電池とする。The electrode body is fixed to the end of the winding by attaching an adhesive tape (not shown) made of polypropylene to the surface of the end of the winding. The electrode body wound in a cylindrical shape was pressed on both sides with a press machine, and the cross section of the electrode body was changed as shown in FIGS.
As shown in FIG. Rectangular electrode body 8
After the first electrode tab 4 and the second electrode tab 5 are connected, the first electrode tab 4 is inserted into the outer can 7, and liquid is injected so that the opening of the outer can 7 is closed
To close the battery.
【００２９】[0029]
【発明の効果】本発明の電極構造は、電極板に接着する
保護テープで、対向する電極タブと電極板との電気接触
を確実に阻止できる特長がある。それは、本発明の電極
構造が、段差のある電極タブの表面に保護テープを接着
するのではなくて、段差のないフラットな電極板の表面
に保護テープを接着しているからである。電極板の表面
に保護テープを接着している電極構造は、電極板と電極
タブとの間に、保護テープとセパレータの２層の絶縁層
が介在する。The electrode structure of the present invention has a feature that a protective tape adhered to an electrode plate can reliably prevent electrical contact between the opposing electrode tab and the electrode plate. This is because the electrode structure of the present invention does not adhere the protective tape to the surface of the stepped electrode tab, but adheres the protective tape to the surface of the flat electrode plate having no step. In an electrode structure in which a protective tape is adhered to the surface of an electrode plate, two insulating layers of a protective tape and a separator are interposed between the electrode plate and the electrode tab.
【００３０】保護テープが、本発明の電極構造のよう
に、段差のない電極板に接着される状態と、従来の電極
構造のように段差のある電極タブの表面に接着される状
態では、保護テープの損傷が著しく相違する。それは、
図２に示すように、段差のある電極タブの表面に接着さ
れた保護テープは、電極タブと電極板の両方に接着され
ないブリッジができ、しかも、ブリッジの両側が接着し
て固定されるからである。両側を固定しているブリッジ
は、ここに押圧力が作用すると、電極タブの隅角で破断
しやすくなる。内面が電極タブの隅角で突かれ、隣接す
るブリッジが引っ張られるからである。In the state where the protective tape is adhered to an electrode plate having no step as in the electrode structure of the present invention, and in the state where it is adhered to the surface of an electrode tab having a step as in the conventional electrode structure, the protective tape is protected. Tape damage is significantly different. that is,
As shown in FIG. 2, the protective tape adhered to the surface of the stepped electrode tab forms a bridge that is not adhered to both the electrode tab and the electrode plate, and both sides of the bridge are adhered and fixed. is there. When a pressing force acts on the bridge fixing both sides, the bridge easily breaks at the corner of the electrode tab. This is because the inner surface is protruded at the corner of the electrode tab, and the adjacent bridge is pulled.
【００３１】本発明の電極構造は、保護テープをフラッ
トな電極板に接着している。電極板の表面に接着される
保護テープは、ブリッジ部分ができず、電極タブの隅角
で破断されることがない。このため、保護テープが電極
タブの隅角で破断されず、電池の内部ショートを確実に
阻止できる特長がある。ただ、保護テープを電極板の表
面に接着している本発明の電極構造は、電極タブの表面
にセパレータがあって、このセパレータが電極タブの隅
角で破断されることが心配される。しかしながら、セパ
レータは保護テープのように、電極タブと電極板の表面
に接着して固定されない。このため、ブリッジとなった
部分に押圧力が作用しても、セパレータは電極タブと電
極板の表面に沿って変形し、裏面が電極タブや電極板に
支持されて、引き延ばされることがない。このため、保
護テープのように電極タブの隅角で強い破断力が作用す
ることがない。したがって、本発明の電極構造のよう
に、電極タブの表面をセパレータで被覆し、電極板の表
面を保護テープで被覆する構造は、セパレータと保護テ
ープの両方の破断を有効に防止して、内部ショートを有
効に阻止できる。In the electrode structure of the present invention, the protective tape is bonded to a flat electrode plate. The protective tape adhered to the surface of the electrode plate does not have a bridge portion and is not broken at the corner of the electrode tab. For this reason, the protective tape is not broken at the corners of the electrode tabs, and has the advantage that the internal short circuit of the battery can be reliably prevented. However, in the electrode structure of the present invention in which the protective tape is adhered to the surface of the electrode plate, there is a concern that the separator is provided on the surface of the electrode tab and the separator is broken at the corner of the electrode tab. However, the separator is not adhered and fixed to the surface of the electrode tab and the electrode plate unlike the protective tape. For this reason, even if the pressing force acts on the bridge portion, the separator is deformed along the surface of the electrode tab and the electrode plate, and the back surface is supported by the electrode tab and the electrode plate, and is not elongated. . For this reason, a strong breaking force does not act at the corner of the electrode tab unlike the protective tape. Therefore, like the electrode structure of the present invention, the structure in which the surface of the electrode tab is covered with the separator, and the surface of the electrode plate is covered with the protective tape, effectively preventing both the separator and the protective tape from breaking, and the internal structure. Shorts can be effectively prevented.
【００３２】さらに、本発明の電極構造は、保護テープ
を段差のない第１電極板の表面に接着するので、段差の
ある電極タブに比較すると、簡単かつ容易に、しかも位
置ずれしたり、あるいは剥離したりしないように確実に
接着して、内部ショートを確実に阻止できる特長もあ
る。Further, in the electrode structure of the present invention, since the protective tape is adhered to the surface of the first electrode plate having no step, the position is easily and easily shifted as compared with the electrode tab having the step, or There is also a feature that the internal short circuit can be reliably prevented by securely bonding so as not to peel off.
【図１】従来の電極構造の一例を示す断面図FIG. 1 is a sectional view showing an example of a conventional electrode structure.
【図２】図１に示す電極構造の保護テープが破断する状
態を示す拡大断面図FIG. 2 is an enlarged sectional view showing a state in which the protective tape having the electrode structure shown in FIG. 1 is broken.
【図３】本発明の実施例の電極構造の電極体が挿入され
た電池の一例を示す断面図FIG. 3 is a sectional view showing an example of a battery in which an electrode body having an electrode structure according to an embodiment of the present invention is inserted.
【図４】本発明の実施例の電極構造の巻き始め部分を示
す断面図FIG. 4 is a sectional view showing a winding start portion of the electrode structure according to the embodiment of the present invention.
【図５】本発明の実施例の電極構造の巻き始め部分を示
す斜視図FIG. 5 is a perspective view showing a winding start portion of the electrode structure according to the embodiment of the present invention.
１…第１電極板 ２…第２電極板 ３…セパレータ ４…第１電極タブ ５…第２電極タブ ６…保護テープ ７…外装缶 ８…電極体 ９…封口板 １０…電極端子 DESCRIPTION OF SYMBOLS 1 ... 1st electrode plate 2 ... 2nd electrode plate 3 ... Separator 4 ... 1st electrode tab 5 ... 2nd electrode tab 6 ... Protective tape 7 ... Outer can 8 ... Electrode body 9 ... Sealing plate 10 ... Electrode terminal
Claims (5)
レータ(3)を介して積層して渦巻状に巻かれており、第
１電極板(1)に第１電極タブ(4)が、第２電極板(2)に第
２電極タブ(5)が接続されており、第２電極タブ(5)は、
セパレータ(3)を介して第１電極板(1)に対向しており、
互いに対向している第２電極タブ(5)と第１電極板(1)の
間に保護テープ(6)を配設してなる電池の電極構造にお
いて、 保護テープ(6)が、第１電極板(1)の芯体表面であって第
２電極タブ(5)と対向する面に接着されており、第１電
極板(1)が、表面に接着された保護テープ(6)とセパレー
タ(3)を介して、第２電極板(2)の第２電極タブ(5)から
絶縁されてなることを特徴とする電池の電極構造。1. A first electrode plate (1) and a second electrode plate (2) are laminated and spirally wound with a separator (3) interposed therebetween, and a first electrode plate (1) is wound around the first electrode plate (1). The electrode tab (4) has a second electrode tab (5) connected to the second electrode plate (2), and the second electrode tab (5) has
Facing the first electrode plate (1) via the separator (3),
In a battery electrode structure in which a protective tape (6) is disposed between a second electrode tab (5) and a first electrode plate (1) facing each other, the protective tape (6) may be a first electrode. The first electrode plate (1) is adhered to the surface of the core body of the plate (1) facing the second electrode tab (5), and the first electrode plate (1) is bonded to the protective tape (6) and the separator ( An electrode structure for a battery, wherein the electrode structure is insulated from a second electrode tab (5) of a second electrode plate (2) via 3).
求項１に記載される電池の電極構造。2. The battery electrode structure according to claim 1, wherein the core of the first electrode plate (1) is a metal foil.
し、Ｕ曲された内側に第１電極タブ(4)を固定してなる
請求項１に記載される電池の電極構造。3. The battery according to claim 1, wherein the tip of the core of the first electrode plate is bent in a U-shape, and the first electrode tab is fixed inside the U-shaped bend. Electrode structure.
(2)が負極板である請求項１に記載される電池の電極構
造。4. The first electrode plate (1) is a positive electrode plate, and the second electrode plate (1) is a positive electrode plate.
2. The battery electrode structure according to claim 1, wherein (2) is a negative electrode plate.
た第１電極板(1)と第２電極板(2)とが細長い形状に巻か
れている請求項１に記載される電池の電極構造。5. The battery electrode according to claim 1, wherein the first electrode plate (1) and the second electrode plate (2) stacked on each other via a separator (3) are wound in an elongated shape. Construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9173955A JPH1126008A (en) | 1997-06-30 | 1997-06-30 | Electrode structure of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9173955A JPH1126008A (en) | 1997-06-30 | 1997-06-30 | Electrode structure of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1126008A true JPH1126008A (en) | 1999-01-29 |
Family
ID=15970160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9173955A Pending JPH1126008A (en) | 1997-06-30 | 1997-06-30 | Electrode structure of battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1126008A (en) |
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|---|---|---|---|---|
| JP2007165224A (en) * | 2005-12-16 | 2007-06-28 | Matsushita Electric Ind Co Ltd | Nonaqueous electrolytic secondary battery |
| JP2008251256A (en) * | 2007-03-29 | 2008-10-16 | Toshiba Corp | Nonaqueous electrolyte battery, battery pack, and automobile |
| KR100958649B1 (en) * | 2002-12-27 | 2010-05-20 | 삼성에스디아이 주식회사 | Battery unit and the winding method thereof and lithum secondary battery using the same |
| JP2015153691A (en) * | 2014-02-18 | 2015-08-24 | 日立マクセル株式会社 | Nonaqueous electrolyte secondary battery |
| WO2018008248A1 (en) * | 2016-07-08 | 2018-01-11 | 株式会社村田製作所 | Battery, battery pack, electronic apparatus, electric vehicle, power storage device and power system |
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1997
- 1997-06-30 JP JP9173955A patent/JPH1126008A/en active Pending
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| KR100958649B1 (en) * | 2002-12-27 | 2010-05-20 | 삼성에스디아이 주식회사 | Battery unit and the winding method thereof and lithum secondary battery using the same |
| JP2007165224A (en) * | 2005-12-16 | 2007-06-28 | Matsushita Electric Ind Co Ltd | Nonaqueous electrolytic secondary battery |
| JP2008251256A (en) * | 2007-03-29 | 2008-10-16 | Toshiba Corp | Nonaqueous electrolyte battery, battery pack, and automobile |
| JP2015153691A (en) * | 2014-02-18 | 2015-08-24 | 日立マクセル株式会社 | Nonaqueous electrolyte secondary battery |
| US10411241B2 (en) | 2014-08-14 | 2019-09-10 | Samsung Sdi Co., Ltd. | Battery including an insulation spacer |
| US10297810B2 (en) | 2014-08-14 | 2019-05-21 | Samsung Sdi Co., Ltd. | Battery comprising a cap plate having a coupling pin |
| US10396338B2 (en) | 2014-08-14 | 2019-08-27 | Samsung Sdi Co., Ltd. | Battery |
| JPWO2018008248A1 (en) * | 2016-07-08 | 2018-12-13 | 株式会社村田製作所 | Batteries, battery packs, electronic devices, electric vehicles, power storage devices, and power systems |
| CN109417187A (en) * | 2016-07-08 | 2019-03-01 | 株式会社村田制作所 | Battery, battery pack, electronic equipment, electric vehicle, electrical storage device and electric system |
| WO2018008248A1 (en) * | 2016-07-08 | 2018-01-11 | 株式会社村田製作所 | Battery, battery pack, electronic apparatus, electric vehicle, power storage device and power system |
| CN109417187B (en) * | 2016-07-08 | 2022-02-08 | 株式会社村田制作所 | Battery, battery pack, electronic device, electric vehicle, power storage device, and power system |
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| JP2021518039A (en) * | 2018-11-27 | 2021-07-29 | エルジー・ケム・リミテッド | Cylindrical secondary battery |
| US11652261B2 (en) | 2018-11-27 | 2023-05-16 | Lg Energy Solution, Ltd. | Cylindrical type secondary battery |
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