JPH11273686A - Cylindrical battery having core type electrode - Google Patents
Cylindrical battery having core type electrodeInfo
- Publication number
- JPH11273686A JPH11273686A JP10074487A JP7448798A JPH11273686A JP H11273686 A JPH11273686 A JP H11273686A JP 10074487 A JP10074487 A JP 10074487A JP 7448798 A JP7448798 A JP 7448798A JP H11273686 A JPH11273686 A JP H11273686A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- current
- current collector
- negative electrode
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Secondary Cells (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Primary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、芯金式電極を有す
る円筒型電池に関する。The present invention relates to a cylindrical battery having a cored electrode.
【０００２】[0002]
【従来の技術】セパレータを挟んで正極板および負極板
を渦巻状に巻装してなる電極アセンブリを電解液ととも
に円筒缶状のケ−スに収容してなる従来の円筒型電池で
は、負極板は、薄い導電金属板からなる集電板の両主面
に活物質を塗着し、乾燥するペースト塗着構造をもつの
が一般的である。このようなペースト塗着構造の電池電
極は芯金式電極とも称される。2. Description of the Related Art In a conventional cylindrical battery in which an electrode assembly formed by spirally winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween is housed together with an electrolytic solution in a cylindrical can-shaped case, a negative electrode plate is provided. In general, a current collector plate made of a thin conductive metal plate has a paste coating structure in which an active material is coated on both main surfaces and dried. A battery electrode having such a paste-coated structure is also referred to as a cored electrode.
【０００３】[0003]
【発明が解決しようとする課題】上述した従来の芯金式
電極を有する円筒型電池は必要電池個数の減少のために
一個あたりの大容量化が強く要求されている。しかし、
電池の大容量化は結局、その大径化または軸方向寸法
（以下、軸長ともいう）の増加を必要とする。しかし、
円筒型電池の大径化は、極板内部で生じた熱の放散が難
しくなることや、充放電に伴う活物質の膨張、収縮に伴
うストレスや電池内圧に対するケ−スの耐圧強化が困難
となるなどの問題のために限界があった。The cylindrical battery having the above-mentioned conventional cored electrode is strongly required to have a large capacity per one in order to reduce the required number of batteries. But,
Increasing the capacity of a battery eventually requires an increase in its diameter or an increase in its axial dimension (hereinafter, also referred to as the axial length). But,
Increasing the diameter of the cylindrical battery makes it difficult to dissipate the heat generated inside the electrode plate, and it is difficult to increase the pressure resistance of the case against the stress caused by the expansion and contraction of the active material due to charge and discharge and the internal pressure of the battery. There were limitations due to problems such as becoming.
【０００４】一方、軸長の増大は、上記問題がそれほど
顕著でないので好ましい。けれども、正極板または負極
板（以下、単に極板ともいう）の反集電側の端部で生じ
た電荷は、活物質中を通って近傍の集電板（すなわち極
板中の板状導電材）に集められ、この電気抵抗が小さい
の集電板中を軸方向集電側へ流れて、集電板の集電側の
端部に設けられたリード部を通じて外部引き出し電極端
子から外部に送られる。On the other hand, an increase in the axial length is preferable because the above problem is not so remarkable. However, the charge generated at the end opposite to the current collecting side of the positive electrode plate or the negative electrode plate (hereinafter, also simply referred to as an electrode plate) passes through the active material and is close to the current collector plate (that is, the plate-shaped conductive material in the electrode plate). Material), flows through the current collecting plate having a small electric resistance to the current collecting side in the axial direction, and flows from the external lead electrode terminal to the outside through the lead portion provided at the current collecting side end of the current collecting plate. Sent.
【０００５】すなわち、上記軸長の増加は、芯金式電極
中の集電板の内部における電流経路の延長のために、芯
金式電極の電気抵抗の増加を招き、その結果、大電流放
電時に顕著な電圧降下、発熱による芯金式電極の温度上
昇を招いてしまう。特に、ニッケル水素電池の好適な使
用温度の範囲は比較的狭いので、このような芯金式電極
の温度上昇はその冷却構造の更なる増強を要求する。That is, the increase in the axial length causes an increase in the electric resistance of the cored electrode due to the extension of the current path inside the current collector plate in the cored electrode, and as a result, a large current discharge occurs. At times, a remarkable voltage drop and heat generation cause a rise in the temperature of the cored electrode. In particular, since the suitable operating temperature range of the nickel-metal hydride battery is relatively narrow, such an increase in the temperature of the cored electrode requires a further enhancement of its cooling structure.
【０００６】このため、芯金式電極を有する円筒型電池
では、大電流放電特性の向上及び電池の大型大容量化の
実現のために芯金式電極の電気抵抗の低下が強く望まれ
ている。この芯金式電極の電気抵抗損失を低減するに
は、集電板を厚くすることが有効であるが、集電板を厚
くすることは活物質充填量の減少を招く他に、集電板の
剛性が増大してそれを正確な寸法の渦巻き形状作製する
のが困難となるという新たな厄介な問題を生じてしま
う。なお、電極アセンブリの径を正確に作製すること
は、電極アセンブリをほぼ同一径の外装缶に収納するた
めに特に重要である。缶径を余裕をみて大きく作製する
ことは、円筒型電池の体積当たりの容量が低下する他、
電解液が余分の隙間に滞って渦巻き状の電極アセンブリ
全体への電解液の回りが不均一となるという不具合が生
じる。For this reason, in a cylindrical battery having a cored electrode, it is strongly desired to reduce the electric resistance of the cored electrode in order to improve the large-current discharge characteristics and to realize a large-capacity and large-capacity battery. . In order to reduce the electric resistance loss of the cored electrode, it is effective to make the current collector plate thicker. However, increasing the thickness of the current collector plate causes a decrease in the amount of active material to be filled. Increases the stiffness of the device, making it difficult to produce a precisely dimensioned spiral shape. It is particularly important to accurately prepare the diameter of the electrode assembly in order to house the electrode assembly in an outer can having substantially the same diameter. Making the can diameter large enough to allow for extra capacity reduces the capacity per volume of the cylindrical battery,
A problem arises in that the electrolyte stagnates in the extra gap and the circumference of the electrolyte over the spiral electrode assembly becomes uneven.
【０００７】本発明は上記問題に鑑みなされたものであ
り、成形性の低下を回避しつつ極板抵抗損失の低減を実
現した芯金式電極を有する円筒型電池を提供すること
を、その解決すべき課題としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a cylindrical battery having a cored electrode which realizes a reduction in electrode plate resistance loss while avoiding a decrease in formability. It should be an issue to be addressed.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
になされた請求項１記載の芯金式電極を有する円筒型電
池の芯金式電極では、多数の集電用線状体が、集電板の
集電側の端部から互いに所定間隔隔ててそれぞれ略軸方
向へ向けて集電板の主面上に延設されている。このよう
にすれば、以下の作用効果を奏する。According to the first aspect of the present invention, there is provided a metal core electrode for a cylindrical battery having a metal core electrode according to the present invention. The current collectors are provided on the main surface of the current collector in a substantially axial direction at predetermined intervals from ends on the current collector side of the current collector. With this configuration, the following operation and effect can be obtained.
【０００９】まず、活物質が両主面への塗布により被着
された集電板を渦巻き状に巻装する際、集電板の渦巻き
状の湾曲が容易であるので、渦巻き状の極板アセンブリ
を容易に形成することができ、結局、成形性を悪化させ
ることなしに、芯金式電極の電気抵抗を低減することが
できる。又は、芯金式電極の電気抵抗及び電力損失の増
大や温度の上昇を抑止しつつ、電池の軸方向長を増大さ
せて電池を大容量化することができる。First, when the current collector plate coated with the active material by coating on both main surfaces is spirally wound, the current collector plate can be easily curved in a spiral shape. The assembly can be easily formed, and eventually, the electric resistance of the cored electrode can be reduced without deteriorating the moldability. Alternatively, it is possible to increase the axial length of the battery and increase the capacity of the battery while suppressing an increase in electric resistance and power loss of the cored electrode and an increase in temperature.
【００１０】また、集電板表面に凹凸が生じることにな
るので、活物質と集電板との密着性が改善され、活物質
が集電板から剥離するのを抑止することができる。請求
項２記載の構成によれば請求項１記載の芯金式電極を有
する円筒型電池において更に、集電用線状体の先端は集
電板の集電側の端部から突出して外部引き出し用の集電
体に溶接される線状のリード部を兼ねるので、この集電
用線状体を通じて集電された電流はそのまま外部引き出
し用の集電体に送電されることができ、特に、芯金式電
極と外部引き出し用の集電体とを耳状突起すなわちリー
ドを介して接続する形式の電池において、電流の迂回を
減らして極板の抵抗損失を一層低減することができる。In addition, since the surface of the current collector plate becomes uneven, the adhesion between the active material and the current collector plate is improved, and the active material can be prevented from peeling off from the current collector plate. According to the second aspect of the present invention, in the cylindrical battery having the cored electrode according to the first aspect, further, the front end of the current collecting linear body protrudes from an end of the current collecting plate on the current collecting side and is externally drawn. The current collected through this current-collecting linear body can be directly transmitted to the external current collector, since the current-collecting linear body also serves as a linear lead portion that is welded to the current collector. In a battery in which a cored electrode and an external current collector are connected via ear-shaped projections, that is, leads, the bypass of current can be reduced and the resistance loss of the electrode plate can be further reduced.
【００１１】[0011]
【発明の実施の形態】本発明の芯金式電極は、円筒型電
池、たとえばニッケル水素電池の正極板又は負極板、特
に負極板に好適に採用することができる。ニッケル水素
電池の負極板の集電板（芯金）としては、パンチングメ
タルやエキスパンドメタルなどに水素吸蔵合金粉末を含
むペーストを塗着したものが採用できる。BEST MODE FOR CARRYING OUT THE INVENTION The cored electrode of the present invention can be suitably used for a positive electrode plate or a negative electrode plate of a cylindrical battery, for example, a nickel-metal hydride battery, particularly a negative electrode plate. As the current collector plate (core metal) of the negative electrode plate of the nickel-metal hydride battery, a plate obtained by applying a paste containing a hydrogen storage alloy powder to a punching metal, an expanded metal, or the like can be used.
【００１２】芯金式電極の集電板の集電側の端部は、外
部引き出し電極端子との接続のために活物質層から電池
の軸方向に突出される。この集電側の端部は、外部引き
出し電極端子に直接に接続されてもよく、電池の径方向
へ延設される外部引き出し用の集電体を介してたとえば
缶底部又は棒体からなる外部引き出し電極端子に接続さ
れてもよく、外部引き出し電極端子の電池内部側の基端
部が円盤状に形成されて上記棒体状の外部引き出し電極
端子と一体化されてもよい。The end of the current collecting plate of the cored electrode protrudes in the axial direction of the battery from the active material layer for connection with an external lead electrode terminal. The end on the current collection side may be directly connected to an external extraction electrode terminal, or may be connected to an external extraction electrode formed of, for example, a can bottom or a rod via an external extraction current collector extending in the radial direction of the battery. The external extraction electrode terminal may be connected to the extraction electrode terminal, or the base end of the external extraction electrode terminal on the battery inner side may be formed in a disk shape and integrated with the rod-shaped external extraction electrode terminal.
【００１３】芯金式電極の集電板の集電側の端部は、芯
金式電極の電池反応に寄与する部分ではないので、以
下、集電板のリード部とも呼ぶものとする。芯金式電極
の集電板の上記リード部は幅が薄いので、抵抗損失低減
や外部引き出し電極端子又は外部引き出し用の集電体と
の溶接性の向上のために、厚い帯状導電板（以下、横リ
ードとも呼ぶ）をその長さ方向（渦巻き状の電極アセン
ブリの周方向）に溶接することが一般的であり、特に、
上記集電板のリード部を外部引き出し用の集電体又は外
部引き出し電極端子に直接溶接する際に溶接性向上の点
で好適である。Since the end of the current collecting plate of the cored electrode does not contribute to the battery reaction of the cored electrode, it is also referred to as a lead of the current collecting plate hereinafter. Since the lead portion of the current collector plate of the cored electrode has a small width, a thick band-shaped conductive plate (hereinafter, referred to as a thin conductive plate) is used to reduce resistance loss and improve weldability with an external lead electrode terminal or a current collector for external lead. , Also referred to as a lateral lead) in the length direction (circumferential direction of the spiral electrode assembly).
It is suitable from the viewpoint of improving weldability when the lead portion of the current collector plate is directly welded to an external lead current collector or an external lead electrode terminal.
【００１４】上記集電板のリード部又は横リードから電
池の周方向へ所定間隔を隔てて軸方向外部引き出し電極
端子側へ耳状のリード（以下、縦リードともいう）を突
出させ、この縦リードを通じて芯金式電極の集電板を外
部引き出し電極端子又は外部引き出し用の集電体に接続
してもよい。集電用線状体は、芯金式電極の集電板を成
形加工して形成することができる他、薄板状の集電板に
線状の導電材を溶接して形成することもできる。An ear-shaped lead (hereinafter, also referred to as a vertical lead) is projected from the lead portion or the horizontal lead of the current collector plate to the external lead electrode terminal side in the axial direction at a predetermined interval in the circumferential direction of the battery. The current collector plate of the cored electrode may be connected to an external lead electrode terminal or a current collector for external lead through the lead. The current-collecting linear body can be formed by forming and processing a current-collecting plate of a cored metal electrode, or can be formed by welding a linear conductive material to a thin-plate-like current collecting plate.
【００１５】[0015]
【実施例１】以下、本発明の円筒型電池の一実施例を図
１及び図２に基づいて説明する。図１は本発明の芯金式
電極を用いた円筒型電池を模式的に示す断面図であり、
正極板１、負極板（芯金式電極）２、これら両電極１、
２を離間させるためのセパレータ（図示せず）、正極リ
ード（横リード）４、負極リード（横リード）５、正極
外部端子６、負極外部端子としての外装缶７を有してい
る。Embodiment 1 An embodiment of a cylindrical battery according to the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view schematically showing a cylindrical battery using the cored electrode of the present invention,
A positive electrode plate 1, a negative electrode plate (core metal electrode) 2, these two electrodes 1,
A separator (not shown) for separating 2, a positive electrode lead (horizontal lead) 4, a negative electrode lead (horizontal lead) 5, a positive external terminal 6, and an outer can 7 as a negative external terminal are provided.
【００１６】正極板１と負極板２とは、セパレータを間
に挟んで渦巻き状に巻かれた状態で外装缶７に収められ
ている。６１は、絶縁体で形成されたスペーサ６１ａを
介して外装缶７の開口端に固定されて、円筒型電池を密
封する蓋板である。正極板１から上方に突出する集電板
には正極リード４に溶接され、正極リード４は、外部引
き出し用集電体６ａ及び蓋板６１を介してキャップ状の
正極外部端子６に電気的に接続され、負極板２は負極リ
ード５を介して外装缶７の底部からなる負極端子部７ａ
に接続されている。The positive electrode plate 1 and the negative electrode plate 2 are housed in an outer can 7 while being spirally wound with a separator interposed therebetween. Reference numeral 61 denotes a lid plate fixed to the open end of the outer can 7 via a spacer 61a formed of an insulator to seal the cylindrical battery. The current collector plate protruding upward from the positive electrode plate 1 is welded to the positive electrode lead 4. The positive electrode lead 4 is electrically connected to the cap-shaped positive electrode external terminal 6 via the external lead current collector 6 a and the cover plate 61. The negative electrode plate 2 is connected via a negative electrode lead 5 to a negative electrode terminal portion 7 a
It is connected to the.
【００１７】負極端子接続構造について更に説明する。
負極外部端子をなす外装缶７の缶底部は負極端子部７ａ
をなし、負極端子部７ａの内面には、円板状の負極集電
体（外部引き出し用の集電体）７ｂが溶接され、負極集
電体７ｂには負極リード５の先端（下端）がスポット溶
接やレーザー溶接などにより接続されている。The negative electrode terminal connection structure will be further described.
The can bottom of the outer can 7 serving as the negative terminal is a negative terminal 7a.
A disk-shaped negative electrode current collector (current collector for external drawing) 7b is welded to the inner surface of the negative electrode terminal portion 7a, and the tip (lower end) of the negative electrode lead 5 is attached to the negative electrode current collector 7b. They are connected by spot welding or laser welding.
【００１８】この実施例の芯金式電極構造の負極板２に
ついて図２及び図３に基づいて更に詳しく説明する。負
極板２は、厚さ約０．０２〜０．１５ｍｍのニッケル板
からなる集電板２１を有し、集電板２１の下端部は活物
質が被着されないリード部２１ａとなっており、このリ
ード部２１ａの一面には、ニッケル板からなる負極リー
ド（横リード）５が巻き取りの長手方向に帯状に溶接さ
れている。The negative electrode plate 2 having a cored electrode structure of this embodiment will be described in more detail with reference to FIGS. The negative electrode plate 2 has a current collecting plate 21 made of a nickel plate having a thickness of about 0.02 to 0.15 mm, and a lower end portion of the current collecting plate 21 is a lead portion 21a on which an active material is not attached. A negative electrode lead (horizontal lead) 5 made of a nickel plate is welded to one surface of the lead portion 21a in a belt shape in the longitudinal direction of winding.
【００１９】また、集電板２１の負極リード５溶接側と
反対側には、その幅方向（電池の軸方向）の両端に達し
て負極板の幅方向に厚さ０．２ｍｍ、幅０．５ｍｍのニ
ッケル板からなる集電用線状体５１が、巻き取り方向に
１００ｍｍの間隔で多数溶接されている。２２は、集電
板２１の両側に被着される活物質層であって、水素吸蔵
合金粉末ペーストを集電板２１に被着した後、ロールプ
レスし、乾燥して作製されている。活物質層２２は、上
述のように、負極リード５以外の集電板１の表面に５ｍ
ｍの厚さで被着されている。On the other side of the current collector plate 21 opposite to the side where the negative electrode lead 5 is welded, it reaches both ends in the width direction (axial direction of the battery) and has a thickness of 0.2 mm and a width of 0.2 mm in the width direction of the negative electrode plate. A large number of current collecting linear bodies 51 made of a 5 mm nickel plate are welded at intervals of 100 mm in the winding direction. Reference numeral 22 denotes an active material layer attached to both sides of the current collecting plate 21. The active material layer 22 is formed by applying a hydrogen storage alloy powder paste to the current collecting plate 21, followed by roll pressing and drying. As described above, the active material layer 22 has a thickness of 5 m on the surface of the current collector plate 1 other than the negative electrode lead 5.
m.
【００２０】なお、集電用線状体５１は、図２及び図３
に一点鎖線で図示するように集電板２１の端部から更に
突出させて上述した縦リードとしてもよい。正極板１
は、ニッケル繊維体からなる基板にペースト状の水酸化
ニッケルを充填し、乾燥させて作製されている。このよ
うに構成した本発明の負極板２の特徴を以下に説明す
る。The current-collecting linear body 51 is shown in FIGS.
Alternatively, as shown by an alternate long and short dash line, the above-described vertical lead may be further protruded from the end of the current collector plate 21. Positive electrode plate 1
Is prepared by filling a substrate made of a nickel fiber with paste-like nickel hydroxide and drying the paste. The features of the negative electrode plate 2 of the present invention thus configured will be described below.
【００２１】まず、この負極板２は、負極リード５及び
活物質層４２の他に、集電板の一主面にその幅方向（電
池の軸方向へ延びる集電用線状体５１をもつので、負極
板２の電気抵抗を減少させて、その抵抗損失及び発熱を
減少することができる。次に、上記電気抵抗の低減にか
かわらず、集電板２１や負極リード５は薄くすることが
できるので、負極板２を渦巻き状に湾曲するのが容易
で、巻き終わり後、それが緩むこともない。First, in addition to the negative electrode lead 5 and the active material layer 42, the negative electrode plate 2 has a current collecting linear body 51 extending in the width direction (axial direction of the battery) on one main surface of the current collecting plate. Therefore, the electric resistance of the negative electrode plate 2 can be reduced to reduce its resistance loss and heat generation.Next, regardless of the reduction in the electric resistance, the current collector plate 21 and the negative electrode lead 5 can be made thinner. As a result, the negative electrode plate 2 can be easily curved in a spiral shape, and does not loosen after winding.
【００２２】集電板２１が、集電用線状体５１の存在に
より実質的に凹凸をもつ形状となるので、活物質層２２
が集電板２１から剥離しにくくなる。特に、渦巻き状に
形成する際、集電板２１の外周側の主面に被着される活
物質層２２には引っ張り応力が生じて割れを生じ易くな
るが、集電板２１のこの外周側の主面に集電用線状体５
１を設けることにより、この問題を大幅に軽減すること
ができる。Since the current collector plate 21 has a substantially uneven shape due to the presence of the current collector linear body 51, the active material layer 22 is formed.
Are less likely to be separated from the current collector plate 21. In particular, when the current collector plate 21 is formed in a spiral shape, a tensile stress is generated in the active material layer 22 adhered to the main surface on the outer peripheral side of the current collector plate 21 so that the active material layer 22 is easily cracked. Current collecting linear body 5 on the main surface of
By providing 1, this problem can be greatly reduced.
【００２３】更に、もし、上述した一点鎖線状に縦リー
ドを設ける場合には、縦集電用線状体５１はこの縦リー
ドと一体に形成することになるので、集電用線状体５１
に集まった電荷はそのままこの縦リードを通じて外部に
流れることができ、電流の迂回がなく極板の抵抗損失を
一層低減することができる。 （変形態様）集電板２１を塑性加工して集電板２１と一
体に集電用線状体５１を形成してもよい。Further, if the vertical leads are provided in a dashed-dotted line, the vertical current-collecting linear members 51 are formed integrally with the vertical leads.
The electric charge collected in this way can flow to the outside through this vertical lead as it is, and there is no detour of the current, so that the resistance loss of the electrode plate can be further reduced. (Modification) The current collecting plate 21 may be plastically processed to form the current collecting linear body 51 integrally with the current collecting plate 21.
【００２４】[0024]
【実施例２】以下、本発明の円筒型電池の他の実施例を
図４、図５を参照して以下に説明する。ただし、実施例
１の構成要素と基本機能が共通する構成要素には同一符
号を付すものとする。この実施例の円筒型電池の基本構
造自体は、実施例１のそれと同じであり、負極板２の構
造だけが異なるので、負極板２の構造だけを説明する。Embodiment 2 Hereinafter, another embodiment of the cylindrical battery of the present invention will be described with reference to FIGS. However, components having the same basic functions as those of the first embodiment are denoted by the same reference numerals. The basic structure of the cylindrical battery of this embodiment is the same as that of Embodiment 1, and only the structure of the negative electrode plate 2 is different. Therefore, only the structure of the negative electrode plate 2 will be described.
【００２５】負極板２は、集電板２１と活物質層２２と
集電用線状体５１からなり、集電板２１と活物質層２２
とは、実施例１における集電板２１と活物質層２２と同
じマクロ構造を有している。この実施例は、集電用線状
体５１と負極リード５とが一体に形成されている点、な
らびに、各集電用線状体５１の幅方向中央部に横バー５
２が一体に形成されている点を特徴としている。The negative electrode plate 2 includes a current collecting plate 21, an active material layer 22, and a current collecting linear body 51.
Has the same macro structure as the current collector 21 and the active material layer 22 in the first embodiment. This embodiment is different from the first embodiment in that the current-collecting linear body 51 and the negative electrode lead 5 are integrally formed, and that the current-collecting linear body 51 has a horizontal bar 5 at the center in the width direction.
2 is integrally formed.
【００２６】このようにすれば、横リードすなわち負極
リード５と横バー５２が、集電板２１の幅方向へそれぞ
れ伸びる多数の集電用線状体５１を一体に連接し、これ
により、多数の集電用線状体５１を集電板２１上に並べ
る作業が極めて簡単となる利点が生まれる。負極リード
５の下端縁５３は図４に示すように外部引き出し用の集
電体７３ｂの上端面に突き合わせて溶接されている。In this way, the horizontal lead, that is, the negative electrode lead 5 and the horizontal bar 52 integrally connect a large number of current collecting linear bodies 51 extending in the width direction of the current collecting plate 21, thereby forming a large number. There is an advantage that the work of arranging the current collecting linear bodies 51 on the current collecting plate 21 becomes extremely simple. As shown in FIG. 4, the lower end 53 of the negative electrode lead 5 is welded to the upper end surface of a current collector 73b for external drawing.
【００２７】また、この実施例によれば、負極板２に横
バー５２を付加して構成したことにより、横バー５２が
各集電用線状体５１同士の電圧差を低減し、また、活物
質層２２の剥離を一層抑止する効果も奏する。 （変形態様）実施例２では、負極リード５及び集電用線
状体５１は、集電板２１の一主面にのみ溶接されたが、
図６及び図７に示すように、二つの実施例２で説明した
互いに一体に作製された負極リード５及び集電用線状体
５１の一体物を集電板２１の両側に設けてもよい。な
お、この場合には、集電用線状体５１は図７に示すよう
に周方向交互に配置されることが好ましい。Further, according to this embodiment, since the horizontal bar 52 is added to the negative electrode plate 2, the horizontal bar 52 reduces the voltage difference between the current collecting linear bodies 51, An effect of further suppressing the separation of the active material layer 22 is also exerted. (Modification) In the second embodiment, the negative electrode lead 5 and the current collecting linear body 51 are welded to only one main surface of the current collecting plate 21.
As shown in FIG. 6 and FIG. 7, an integrated body of the negative electrode lead 5 and the current-collecting linear body 51 integrally formed with each other described in the second embodiment may be provided on both sides of the current collector plate 21. . In this case, it is preferable that the current collecting linear bodies 51 are alternately arranged in the circumferential direction as shown in FIG.
【００２８】なお、上記した一個の一体物の偶数番目の
集電用線状体５１を集電板２１の一主面に溶接し、その
奇数番目の集電用線状体５１を集電板２１の他主面に溶
接してもよい。In addition, the even-numbered current-collecting linear bodies 51 of the one piece are welded to one main surface of the current-collecting plate 21, and the odd-numbered current-collecting linear bodies 51 are connected to the current-collecting plate. 21 may be welded to the other main surface.
【図１】実施例１の円筒型電池を模式的に示す断面図で
ある。FIG. 1 is a cross-sectional view schematically showing a cylindrical battery of Example 1.
【図２】図１の負極板２及び負極リード５を示す一部展
開図である。FIG. 2 is a partially developed view showing a negative electrode plate 2 and a negative electrode lead 5 of FIG.
【図３】図１の正極板４及びリード部７を示す一部断面
図である。FIG. 3 is a partial sectional view showing a positive electrode plate 4 and a lead portion 7 of FIG.
【図４】実施例２の電池における負極板２の一部を示す
一部展開図である。FIG. 4 is a partially developed view showing a part of a negative electrode plate 2 in the battery of Example 2.
【図５】図４の負極板２及び負極リード５を示す一部展
開図である。FIG. 5 is a partially developed view showing the negative electrode plate 2 and the negative electrode lead 5 of FIG.
【図６】実施例２の負極板２及び負極リード５の変形態
様を示す一部断面図である。FIG. 6 is a partial cross-sectional view showing a modified embodiment of the negative electrode plate 2 and the negative electrode lead 5 of Example 2.
【図７】図６の負極板２の幅方向断面図である。7 is a cross-sectional view in the width direction of the negative electrode plate 2 of FIG.
１は正極板、２は負極板（芯金式電極）、５は負極リー
ド、７は負極をなす外装缶（外部引き出し電極端子）、
７ｂは外部引き出し用の集電体、２１は集電板、２２は
活物質層、５１は集電用線状体。1 is a positive electrode plate, 2 is a negative electrode plate (core metal electrode), 5 is a negative electrode lead, 7 is an outer can serving as a negative electrode (external lead electrode terminal),
7b is a current collector for external extraction, 21 is a current collector plate, 22 is an active material layer, and 51 is a current collecting linear body.
Claims (2)
端が外部引き出し用の集電体に電気的に接続される渦巻
き状の集電板を有する芯金式電極を備える円筒型電池に
おいて、 前記集電側の一側端から互いに所定間隔隔ててそれぞれ
略軸方向へ向けて前記集電板の主面に形成される多数の
集電用線状体を備えることを特徴とする芯金式電極を有
する円筒型電池。1. A cored electrode having a spiral current collector plate on which active material is applied to both main surfaces and one end of a current collector side is electrically connected to a current collector for external extraction. A plurality of current-collecting linear bodies formed on a main surface of the current collector plate in a substantially axial direction at predetermined intervals from one end of the current collector side. A cylindrical battery having a cored electrode.
電池において、 前記集電用線状体の先端は前記集電板の集電側の一側端
から突出して前記外部引き出し用の集電体に溶接される
ことを特徴とする芯金式電極を有する円筒型電池。2. The cylindrical battery having a cored electrode according to claim 1, wherein a front end of the current collecting linear body projects from one end of the current collecting plate on the current collecting side to allow the external drawing. A cylindrical battery having a cored electrode, which is welded to the current collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10074487A JPH11273686A (en) | 1998-03-23 | 1998-03-23 | Cylindrical battery having core type electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10074487A JPH11273686A (en) | 1998-03-23 | 1998-03-23 | Cylindrical battery having core type electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11273686A true JPH11273686A (en) | 1999-10-08 |
Family
ID=13548707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10074487A Pending JPH11273686A (en) | 1998-03-23 | 1998-03-23 | Cylindrical battery having core type electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11273686A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013054900A (en) * | 2011-09-04 | 2013-03-21 | Toyota Industries Corp | Battery |
-
1998
- 1998-03-23 JP JP10074487A patent/JPH11273686A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013054900A (en) * | 2011-09-04 | 2013-03-21 | Toyota Industries Corp | Battery |
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