JP4036360B2 - Sealed battery - Google Patents

Sealed battery Download PDF

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JP4036360B2
JP4036360B2 JP2002168199A JP2002168199A JP4036360B2 JP 4036360 B2 JP4036360 B2 JP 4036360B2 JP 2002168199 A JP2002168199 A JP 2002168199A JP 2002168199 A JP2002168199 A JP 2002168199A JP 4036360 B2 JP4036360 B2 JP 4036360B2
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Prior art keywords
battery
battery element
sealed
wound
negative electrode
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JP2004014374A (en
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健司 清宮
宏幸 平間
正巳 駒庭
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Tokin Corp
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NEC Tokin Corp
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    • 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

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Description

【０００１】
【発明の属する技術分野】
本発明は、セパレータを介して正極電極および負極電極を対向させて巻回した巻回型の電池要素を有した密閉型電池に関し、とくに電池缶内への装着に好適な密閉型電池に関する。
【０００２】
【従来の技術】
リチウムイオン電池等の非水電解液電池は、帯状の正極集電体および負極集電体上に電極活物質層を形成した、正極電極および負極電極をセパレータを介して対向させて巻回した巻回型の電池要素が用いられている。
巻回型の電池要素は、円筒状のもの、あるいは糸巻き状に巻回して扁平に成形したのものが用いられており、それぞれ円筒状の電池缶、角柱状の電池缶に収納したり、可撓性の部材によって封口されている。
【０００３】
これらの電池要素は、電池の容量密度を大きくするために、電池缶の内寸法と同等の大きさのものを作製して電池缶内に挿入している。電池缶内に挿入する際に電池要素を円滑に挿入することができ、電池要素に傷等が生じないようにするために、正極電極、負極電極、およびセパレータを巻回した後に、粘着性の巻止めテープによって固定することが行われている。
【０００４】
また、電池缶のように金属製の電池容器を用いた電池の場合には、電池缶が一方の電極端子としての作用を果たしている。このため、電池缶の壁面と異極性の電池電極が接触して短絡する事態を避けるために、電池要素の挿入の前に電池缶の缶底部に絶縁板を配置することが行われている。また、電池缶の缶底部への絶縁板の配置に代えて、電池要素の外装缶へ挿入する端面に、絶縁板をあらかじめ取り付け、電池缶への挿入時の電池要素の損傷を防止することが特開平５−７４４２４号公報において提案されている。
また、同様に電池要素の巻回体のコアと電池要素の底面に配置する絶縁部材とを取り付けたスパイラル型非水電解液電池が特開平８−３２９９５８号公報において提案されている。
これらの電池は、いずれも電池要素の電池缶の底部に接する側に絶縁板を配置するものであり、電池製造工程において、電池要素の一方の端面に突出したセパレータ面に絶縁板を配置するものであり、電池組立工程に新たな工程を必要とするとともに、絶縁板を配置しても、電池要素の巻止め防止テープによる工程が必要であった。
【０００５】
また、電池要素の底部に位置する端面に絶縁板を配置することに代えて、粘着性テープによって電池要素の底部を保護することが行われている。
図４は、従来の密閉型電池を説明する図である。
図４（Ａ）は、透視した斜視図であるり、図４（Ｂ）は、側面側の断面図である。
密閉型電池１は、電池缶２内には、電池要素５が収納されている。電池要素５は正極側の電池電極と負極側の電池電極をセパレータを介して巻回して巻止めテープ６を貼り付けて電池要素５の巻きほぐれの防止が行われている。更に、電池要素５の下部の底面１５に底面テープ１８が貼り付けられたものである場合には、電池要素を電池缶内に収納する際に電池要素の挿入に先だって絶縁板を装着する必要はない。しかしながら、電池要素の上部に接続した導電接続タブ７、８、あるいは電池電極の上部が、電池缶内壁面、電池ヘッダー９の金属板１０およびその接合個所１１、あるいは金属板の１０と極性が異なる導電接続端子１２等の極性が異なる部分と接触して短絡を生じないようにするために、導電接続タブを収納する大きさの絶縁部材１９を配置することが必要であり、また電池要素５の巻止めテープ６の貼り付けと底面テープ１８の貼り付けの工程が必要であった。
【０００６】
【発明が解決しようとする課題】
本発明は、正極電極および負極電極をセパレータを介して対向させて巻回した巻回型の電池要素を収納した密閉型電池において、電池要素の巻ほぐれを防止する巻止めテープと電池要素の底面に貼り付ける底面テープの貼り付けとの２工程を必要とせず、また電池要素の上部には電池要素に接続した導電接続タブの短絡を防止する絶縁性部材の配置の必要がない密閉型電池を提供することを課題とするものである。
【０００７】
【課題を解決するための手段】
本発明の課題は、正極電極と負極電極とをセパレータを介して対向させて巻回した巻回体からなる電池要素を有する密閉型電池において、電池要素の外周部が電池要素の高さよりも幅が大きな巻止めテープによって巻止めされ、電池要素の上部と電池ヘッダーの間の空間には、該空間と同等の長さとなるように巻止めテープの端部が配置されて導電接続タブ、正極電極および負極電極が、電池缶の内壁面、あるいは電池ヘッダーの内壁面と接触することを防止した密閉型電池によって解決することができる。
また、電池要素の上部と電池ヘッダーの間の空間に配置された巻止めテープには、粘着材層が形成されていない密閉型電池である。
電池要素の底部の端面は、巻止めテープで被覆されていない領域を設けた前記の密閉型電池である。
リチウムイオン二次電池である前記の密閉型電池である。
【０００８】
【発明の実施の形態】
本発明は、正極電極と負極電極をセパレータを介して巻回した電池要素において、電池要素の巻回体の膨らみによって対極との距離が大きくなることを抑制し、電池の容量密度を大きくし、また電池缶への電池要素の挿入時の損傷防止、電池要素の上部端面との短絡防止、電池電極の下部端面と電池缶の缶底部との短絡防止等を巻止めテープの貼り付け方法を工夫することによって可能としたものである。
これによって、本発明の密閉型電池は、電池要素を作製する際に、巻止め用の粘着テープの貼り付け工程において、電池要素の巻ほぐれ防止と電池要素の上部端面の短絡防止、電池要素下部端面の接触防止の処理を同時に行うことを可能としてものである。
【０００９】
以下に図面を参照して本発明を説明する。
図１は、本発明の一実施例の密閉型電池を説明する図を示し、図１（Ａ）は、電池ヘッダの取り付け前の状態を透視した正面側の一部を切り欠いた斜視図であり、図１（Ｂ）は、側面側の断面図である。
密閉型電池１は、ステンレス鋼、ニッケルめっきを表面に施した軟鋼、アルミニウム等からなる角筒状の金属容器２（以下、電池缶とも称す）に、セパレータ、正極電極３、セパレータ４、負極電極５、セパレータ４の順に積層したものを糸巻き状に巻回した後に、押圧して扁平に成形した電池要素５に巻止めテープ６を貼り付けて巻きほぐれを防止している。
電池要素３の正極電極３および負極電極５に接合した導電接続タブ７、８は、電池ヘッダ９の金属板１０の接合個所１１、および外部接続端子部１２にそれぞれ接合されている。更に電池要素の上部には絶縁板１３が配置されており、絶縁板１３と巻止めテープ６の電池要素５の上部へ延びた上部突出部１４によって、導電接続タブ７、８、正極電極３および負極電極５が、電池缶の内壁面、電池ヘッダの内壁面と接触して短絡が生じるのが防止される。
【００１０】
また、本発明の電池要素は、周囲が完全に巻止めテープ６によって被覆されているので、電池要素５を電池缶２内へ収納する際に、電池缶の壁面と接触して電池要素が損傷を受けることを防止することができる。さらに、巻止めテープ６によって電池要素５の底面１５も被覆されているために、電池要素の端面において電池電極が電池缶の壁面と接触して短絡することを防止する絶縁板を装着することも不要となる。
【００１１】
次に、本発明の密閉型電池において使用される電池要素の作製方法について説明する。
図２は、本発明の密閉型電池に用いる電池要素の作製方法の一例を説明する図である。図２（Ａ）は上部の一部を切り欠いた斜視図であり、図２（Ｂ）は、図２（Ａ）とは反対側から見た斜視図である。
セパレータ、正極電極、セパレータ、負極電極の順に積層して糸巻き状に巻回した後に扁平に押圧した電池要素３を、図２（Ａ）に示すように、電池要素５の外周に電池要素の高さよりも大きな巻止めテープ６を貼り付けて、電池要素５の上部へ延びた上部突出部１４が、電池要素を電池缶内へ収納した際に電池ヘッダーとの空間と同等の長さとなる用に調整する。
次いで、図２（Ｂ）に示すように、電池要素の下端部から延びた巻止めテープ６の下部突出部１６を電池要素の底面を覆うように折り曲げて電池要素の反対側の面に貼り付ける。次いで、全体を所定の形状に成形し電池要素を作製することができる。以上の方法では、電池要素の巻止めテープの粘着層によって、電池要素の巻ほぐれ防止とともに電池要素の下部も同時に被覆することができる。
巻止めテープの電池要素の上部よりも突出した部分は、いずれにも貼り付ける必要はないので、電池要素の上部よりも突出する部分には粘着材層を形成しないものであっても良い。
【００１２】
図３は、本発明の密閉型電池に用いる電池要素の作製方法の他の例を説明する図である。図３（Ａ）は上部の一部を切り欠いた斜視図であり、図３（Ｂ）は、図３（Ａ）とは反対側から見た斜視図である。図３（Ｃ）は底面を説明する図である。
セパレータ、正極電極、セパレータ、負極電極の順に積層して糸巻き状に巻回した後に扁平に押圧した電池要素５を、図３（Ａ）に示すように、電池要素５の外周に、電池要素の上端部よりも突出させて、上部突出部１４を形成した状態 て巻止めテープ６を貼り付けて電池要素を電池缶内に挿入する際の保護と、電池要素の上部が電池缶の内壁面と接触することを防止する。
電池要素の下端部には、下部突出部１６を電池要素の底面を覆うように折り曲げて電池要素の反対側の面に貼り付けるとともに、電池要素の下端部には巻止めテープで覆われていない非被覆部１７が形成されている。
【００１３】
電池要素の底面は巻止めテープによって両端部が被覆されているので、電池要素を電池缶に挿入した場合には、電池要素の底面と電池缶の内面とは、両端部の被覆部において接触し、電池要素と電池缶の内面との間の導電接触が防止される。また、同時に電池要素の端面の一部には被覆されていない領域が形成されているので電池要素の底面からの電解液の浸透も充分なものとなる。
本発明において用いることができる巻止めテープとしては、ポリプロピレンフィルム、ポリイミドフィルム等に粘着材層を形成したものを挙げることができ、電池要素の上部に突出した部分には、粘着材層を形成していないものが好ましい。
【００１４】
【発明の効果】
本発明の密閉型電池は、正極電極と負極電極とをセパレータを介して対向させて巻回した電池要素の巻止め用の巻止めテープを電池の上部を越えて装着したので、電池要素の電池缶内への収納の際に電池缶の端面で損傷を受ける可能性をなくすとともに、電池要素に取り付けた導電接続タブ等と電池缶内壁面あるいは電池ヘッダーとの短絡は絶縁板を装着するのみで確実に防止することができる。
【図面の簡単な説明】
【図１】図１は、本発明の一実施例の密閉型電池を説明する図を示す。
【図２】図２は、本発明の密閉型電池に用いる電池要素の作製方法の一例を説明する図である。
【図３】図３は、本発明の密閉型電池に用いる電池要素の作製方法の他の例を説明する図である。
【図４】図４は、従来の電池要素を説明する図である。
【符号の説明】
１…密閉型電池、２…金属容器、３…正極電極、４…セパレータ、５…負極電極、５…電池要素、６…巻止めテープ、７，８…導電接続タブ、９…電池ヘッダー、１０…金属板、１１…接合個所、１２…外部接続端子部、１３…絶縁板、１４…上部突出部、１５…底面、１６…下部突出部、１７…非被覆部、１８…底面テープ、１９…絶縁部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealed battery having a wound battery element in which a positive electrode and a negative electrode are wound with a separator interposed therebetween, and more particularly to a sealed battery suitable for mounting in a battery can.
[0002]
[Prior art]
A non-aqueous electrolyte battery such as a lithium ion battery has an electrode active material layer formed on a strip-shaped positive electrode current collector and a negative electrode current collector, and is wound with a positive electrode and a negative electrode facing each other through a separator. A revolving battery element is used.
The wound type battery element is used in a cylindrical shape or in a flat shape by being wound into a bobbin, and can be stored in a cylindrical battery can or prismatic battery can. Sealed by a flexible member.
[0003]
In order to increase the capacity density of the battery, these battery elements are manufactured in the same size as the inner dimensions of the battery can and inserted into the battery can. The battery element can be smoothly inserted when inserted into the battery can, and the positive electrode, the negative electrode, and the separator are wound after the winding to prevent the battery element from being damaged. Fixing with a winding tape is performed.
[0004]
In the case of a battery using a metal battery container such as a battery can, the battery can functions as one electrode terminal. For this reason, in order to avoid the situation where the wall surface of the battery can and the battery electrode of different polarity come into contact with each other and short-circuit, an insulating plate is disposed on the bottom of the battery can before insertion of the battery element. Also, instead of placing the insulating plate on the bottom of the battery can, an insulating plate is attached in advance to the end surface of the battery element to be inserted into the outer can, thereby preventing damage to the battery element when inserted into the battery can. This is proposed in Japanese Patent Laid-Open No. 5-74424.
Similarly, Japanese Patent Application Laid-Open No. 8-329958 proposes a spiral type non-aqueous electrolyte battery in which a core of a battery element wound body and an insulating member disposed on the bottom surface of the battery element are attached.
In these batteries, an insulating plate is disposed on the side of the battery element that contacts the bottom of the battery can. In the battery manufacturing process, an insulating plate is disposed on the separator surface protruding from one end surface of the battery element. In addition, a new process is required for the battery assembly process, and even if an insulating plate is disposed, a process using a winding prevention tape for the battery element is required.
[0005]
Moreover, it replaces with arrange | positioning an insulating plate in the end surface located in the bottom part of a battery element, and protecting the bottom part of a battery element with an adhesive tape is performed.
FIG. 4 is a diagram illustrating a conventional sealed battery.
FIG. 4A is a perspective view seen through, and FIG. 4B is a side sectional view.
In the sealed battery 1, a battery element 5 is accommodated in a battery can 2. In the battery element 5, the positive electrode side battery electrode and the negative electrode side battery electrode are wound through a separator and a winding stopper tape 6 is attached to prevent the battery element 5 from being loosened. Furthermore, when the bottom surface tape 18 is attached to the bottom surface 15 of the lower part of the battery element 5, it is necessary to attach an insulating plate prior to insertion of the battery element when the battery element is stored in the battery can. Absent. However, the polarity of the conductive connection tabs 7 and 8 connected to the upper part of the battery element or the upper part of the battery electrode is different from that of the inner surface of the battery can, the metal plate 10 of the battery header 9 and its junction 11, or the metal plate 10. In order to prevent a short circuit from coming into contact with a portion having a different polarity such as the conductive connection terminal 12, it is necessary to arrange an insulating member 19 having a size for accommodating the conductive connection tab. The steps of attaching the winding tape 6 and attaching the bottom tape 18 were necessary.
[0006]
[Problems to be solved by the invention]
The present invention relates to a sealed battery that houses a wound battery element in which a positive electrode and a negative electrode are wound with a separator interposed therebetween, and a winding tape that prevents the battery element from unwinding and a bottom surface of the battery element A sealed battery that does not require the two steps of attaching the bottom surface tape to be attached to the battery element and that does not require an insulating member disposed on the upper part of the battery element to prevent a short circuit of the conductive connection tab connected to the battery element. The issue is to provide.
[0007]
[Means for Solving the Problems]
An object of the present invention is to provide a sealed battery having a battery element comprising a wound body in which a positive electrode and a negative electrode are opposed to each other with a separator interposed therebetween, and the outer periphery of the battery element is wider than the height of the battery element. Is secured by a large retaining tape, and an end portion of the retaining tape is disposed in the space between the upper part of the battery element and the battery header so as to have the same length as the space, and the conductive connection tab and the positive electrode This can be solved by a sealed battery that prevents the negative electrode from coming into contact with the inner wall surface of the battery can or the inner wall surface of the battery header.
Moreover, it is a sealed battery in which the adhesive material layer is not formed on the winding tape disposed in the space between the upper part of the battery element and the battery header.
The end face of the bottom part of the battery element is the above-described sealed battery provided with a region not covered with the winding tape.
It is the said sealed battery which is a lithium ion secondary battery.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the battery element in which the positive electrode and the negative electrode are wound via the separator, the present invention suppresses an increase in the distance from the counter electrode due to the swelling of the wound body of the battery element, and increases the capacity density of the battery. In addition, we devised a method of attaching a winding tape to prevent damage when inserting the battery element into the battery can, to prevent a short circuit with the upper end face of the battery element, and to prevent a short circuit between the lower end face of the battery electrode and the bottom of the battery can. It is possible by doing.
As a result, the sealed battery of the present invention can prevent the battery element from unwinding and the short-circuiting of the upper end surface of the battery element and the lower part of the battery element in the step of attaching the adhesive tape for winding when the battery element is manufactured. It is possible to perform the processing for preventing contact of the end faces at the same time.
[0009]
The present invention will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating a sealed battery according to an embodiment of the present invention, and FIG. 1A is a perspective view in which a part on the front side is seen through the state before the battery header is attached. FIG. 1B is a side sectional view.
The sealed battery 1 includes a separator, a positive electrode 3, a separator 4, and a negative electrode in a rectangular tube-like metal container 2 (hereinafter also referred to as a battery can) made of stainless steel, nickel-plated mild steel, aluminum, or the like. 5, the separator 4 laminated in this order is wound in a bobbin shape, and then the winding tape 6 is applied to the battery element 5 that is pressed and formed flat to prevent unwinding.
The conductive connection tabs 7 and 8 joined to the positive electrode 3 and the negative electrode 5 of the battery element 3 are joined to the joint portion 11 of the metal plate 10 of the battery header 9 and the external connection terminal portion 12, respectively. Further, an insulating plate 13 is disposed on the upper side of the battery element, and the conductive connection tabs 7 and 8, the positive electrode 3 and the upper protruding portion 14 extending to the upper side of the battery element 5 of the insulating plate 13 and the winding tape 6. The negative electrode 5 is prevented from coming into contact with the inner wall surface of the battery can and the inner wall surface of the battery header to cause a short circuit.
[0010]
In addition, since the battery element of the present invention is completely covered with the winding tape 6 when the battery element 5 is housed in the battery can 2, the battery element is damaged by contact with the wall surface of the battery can 2. Can be prevented. Furthermore, since the bottom surface 15 of the battery element 5 is also covered by the winding tape 6, an insulating plate that prevents the battery electrode from coming into contact with the wall surface of the battery can at the end face of the battery element may be attached. It becomes unnecessary.
[0011]
Next, a method for producing a battery element used in the sealed battery of the present invention will be described.
FIG. 2 is a diagram for explaining an example of a method for producing a battery element used in the sealed battery of the present invention. 2A is a perspective view in which a part of the upper portion is cut away, and FIG. 2B is a perspective view as viewed from the side opposite to FIG. 2A.
As shown in FIG. 2 (A), the battery element 3 pressed in a flat state after being laminated in the order of the separator, the positive electrode, the separator, and the negative electrode is wound on the outer periphery of the battery element 5. The upper protrusion 14 extending to the upper part of the battery element 5 with the larger winding stopper 6 is attached to have a length equivalent to the space with the battery header when the battery element is stored in the battery can. adjust.
Next, as shown in FIG. 2B, the lower protrusion 16 of the winding tape 6 extending from the lower end of the battery element is bent so as to cover the bottom surface of the battery element, and is attached to the opposite surface of the battery element. . Subsequently, the whole can be formed into a predetermined shape to produce a battery element. In the above method, the adhesive layer of the battery element anti-winding tape can simultaneously prevent the battery element from being loosened and simultaneously cover the lower part of the battery element.
Since the portion protruding from the upper part of the battery element of the winding tape does not need to be attached to any part, the adhesive material layer may not be formed on the part protruding from the upper part of the battery element.
[0012]
FIG. 3 is a diagram for explaining another example of a method for producing a battery element used in the sealed battery of the present invention. 3A is a perspective view in which a part of the upper portion is cut away, and FIG. 3B is a perspective view as viewed from the side opposite to FIG. 3A. FIG. 3C illustrates the bottom surface.
The battery element 5 that is laminated in the order of the separator, the positive electrode, the separator, and the negative electrode and wound flatly and then pressed flatly is placed on the outer periphery of the battery element 5 as shown in FIG. Projecting from the upper end, forming the upper projecting portion 14, attaching the winding tape 6 and protecting the battery element when inserting it into the battery can, and the upper part of the battery element is the inner wall of the battery can Prevent contact.
At the lower end of the battery element, the lower projecting portion 16 is bent so as to cover the bottom surface of the battery element and is attached to the opposite surface of the battery element, and the lower end of the battery element is not covered with a winding tape. An uncovered portion 17 is formed.
[0013]
Since both ends of the bottom surface of the battery element are covered with a winding tape, when the battery element is inserted into the battery can, the bottom surface of the battery element and the inner surface of the battery can come into contact with each other at the covering portions at both ends. Conductive contact between the battery element and the inner surface of the battery can is prevented. At the same time, since an uncovered region is formed on a part of the end face of the battery element, the electrolyte solution can be sufficiently penetrated from the bottom face of the battery element.
Examples of the winding tape that can be used in the present invention include a polypropylene film, a polyimide film, and the like in which an adhesive material layer is formed, and an adhesive material layer is formed on the protruding portion of the battery element. Those not present are preferred.
[0014]
【The invention's effect】
In the sealed battery of the present invention, since the winding tape for winding the battery element in which the positive electrode and the negative electrode are wound with the separator interposed therebetween is mounted beyond the upper part of the battery, the battery of the battery element In addition to eliminating the possibility of damage at the end face of the battery can during storage in the can, short-circuiting between the conductive connection tab attached to the battery element and the inner wall surface of the battery can or the battery header can be achieved by simply attaching an insulating plate. It can be surely prevented.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a sealed battery according to an embodiment of the present invention.
FIG. 2 is a diagram for explaining an example of a method for producing a battery element used in the sealed battery of the present invention.
FIG. 3 is a diagram for explaining another example of a method for producing a battery element used in the sealed battery of the present invention.
FIG. 4 is a diagram illustrating a conventional battery element.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Sealed battery, 2 ... Metal container, 3 ... Positive electrode, 4 ... Separator, 5 ... Negative electrode, 5 ... Battery element, 6 ... Winding tape, 7, 8 ... Conductive connection tab, 9 ... Battery header, 10 DESCRIPTION OF SYMBOLS ... Metal plate, 11 ... Joint part, 12 ... External connection terminal part, 13 ... Insulating plate, 14 ... Upper protrusion part, 15 ... Bottom protrusion part, 16 ... Lower protrusion part, 17 ... Uncovered part, 18 ... Bottom face tape, 19 ... Insulating material

Claims (1)

正極電極と負極電極とをセパレータを介して対向させて巻回した巻回体からなる電池要素を有する密閉型電池において、電池要素の外周部が電池要素の高さよりも幅が大きな巻止めテープによって巻止めされ、電池要素の上部と電池ヘッダーの間の空間には、該空間と同等の長さとなるように巻止めテープの端部が配置されて導電接続タブ、正極電極および負極電極が、電池缶の内壁面、あるいは電池ヘッダーの内壁面と接触することを防止したことを特徴とする密閉型電池。  In a sealed battery having a battery element composed of a wound body in which a positive electrode and a negative electrode are wound with a separator facing each other, the outer periphery of the battery element has a winding tape whose width is larger than the height of the battery element. In the space between the upper part of the battery element and the battery header, the end of the winding tape is arranged so as to have the same length as the space, and the conductive connection tab, the positive electrode and the negative electrode are connected to the battery. A sealed battery characterized by preventing contact with an inner wall surface of a can or an inner wall surface of a battery header.
JP2002168199A 2002-06-10 2002-06-10 Sealed battery Expired - Fee Related JP4036360B2 (en)

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KR100686812B1 (en) * 2005-04-26 2007-02-26 삼성에스디아이 주식회사 Secondary battery
KR100959613B1 (en) * 2006-03-27 2010-05-27 삼성에스디아이 주식회사 Electrode assembly for cylinderical lithium rechargeable battery and Cylinderical lithium rechargeable battery using the same and Method of making the cylinderical lithium rechargeable battery
CN102074359A (en) * 2010-12-20 2011-05-25 天津力神电池股份有限公司 Circular supercapacitor
JP5651614B2 (en) * 2012-02-09 2015-01-14 日立オートモティブシステムズ株式会社 Square secondary battery and module
JP6127957B2 (en) 2013-12-13 2017-05-17 ソニー株式会社 Battery and battery pack
CN106992320A (en) * 2016-01-20 2017-07-28 松下能源(无锡)有限公司 Battery with nonaqueous electrolyte

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