JP2001068164A - Wound secondary battery - Google Patents
Wound secondary batteryInfo
- Publication number
- JP2001068164A JP2001068164A JP23959699A JP23959699A JP2001068164A JP 2001068164 A JP2001068164 A JP 2001068164A JP 23959699 A JP23959699 A JP 23959699A JP 23959699 A JP23959699 A JP 23959699A JP 2001068164 A JP2001068164 A JP 2001068164A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- pole
- secondary battery
- insulating
- positive 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.)
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は捲回式二次電池に係
り、特に軸芯を有する捲回群が電池容器に収容され、極
柱が前記電池容器内から電池蓋に形成された穴を貫通し
て外部端子となり、前記電池蓋と前記極柱のフランジ部
との間に電気的絶縁性を有する弾性部材を介在させた捲
回式二次電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wound type secondary battery, and more particularly, to a wound group having a shaft core accommodated in a battery container, and a pole formed in a battery lid from inside the battery container. The present invention relates to a wound secondary battery that penetrates into an external terminal and has an elastic member having electrical insulation interposed between the battery lid and the flange portion of the pole.
【０００２】[0002]
【従来の技術】近年の電子技術の進歩により、電子機器
の性能が向上すると共に小型化・ポータブル化が進み、
電子機器用電源としてより高エネルギー密度の電池が望
まれている。このため、自己放電が小さい上に軽量とい
う優れた特性を持つ金属リチウムやリチウム合金を負極
として使用したリチウム二次電池の研究が盛んに行われ
ている。しかしながら、この電池では、充放電時に負極
で金属リチウムがデンドライト状に析出するので、正極
と短絡を起こしやすい、という問題点がある。2. Description of the Related Art Recent advances in electronic technology have improved the performance of electronic devices and have made them more compact and portable.
A battery with a higher energy density is desired as a power supply for electronic devices. For this reason, studies on lithium secondary batteries using lithium metal or lithium alloy having excellent characteristics of small self-discharge and light weight as a negative electrode have been actively conducted. However, this battery has a problem that lithium metal is deposited in a dendrite shape at the negative electrode during charge and discharge, and thus a short circuit with the positive electrode is likely to occur.
【０００３】そこで、この問題点を克服した電池系とし
て、負極に炭素材を使用した有機電解質二次電池が実用
化されるに至っている。有機電解質二次電池では、リチ
ウムイオンの炭素層間へのドープ・脱ドープを負極反応
に利用するので、適切な電池設計により金属リチウムは
析出しない。従って、上述したリチウム二次電池に比
べ、より安全な電池であるといえる。[0003] As a battery system that overcomes this problem, an organic electrolyte secondary battery using a carbon material for the negative electrode has been put to practical use. In an organic electrolyte secondary battery, doping and undoping of lithium ions between carbon layers is used for a negative electrode reaction, so that lithium is not deposited by appropriate battery design. Therefore, it can be said that the battery is safer than the above-described lithium secondary battery.
【０００４】図５はこのような有機電解質二次電池の従
来例を示したものである。図５に示すように、有機電解
質二次電池１００は捲回群１２が、アルミニウム製の正
極極柱２０（図示を省略した負極極柱は純銅）から捲回
群１２方向へ突出した突出部を捲回群１２の中心である
管状の軸芯１４に挿入することにより支持されている。
捲回群１２の正極集電体から延出された正極リード３０
は束ねられ、正極極柱２０に図示しない押さえ金具を挟
んで超音波溶接されている。正極極柱２０は、絶縁リン
グ２６、Ｏリング２８、及び電池蓋１８を組み込んで絶
縁ワッシャ２４を介してナット２２で締め付けられて電
池蓋１８に固定されており、このナット締めによりＯリ
ング２８はシール圧を得ている。電池蓋１８は、例え
ば、ＳＵＳ３０４等のステンレス製の電池容器１６にレ
ーザ溶接することにより固定されている。なお、負極側
も正極側と同様とされている。FIG. 5 shows a conventional example of such an organic electrolyte secondary battery. As shown in FIG. 5, in the organic electrolyte secondary battery 100, the winding group 12 has a protruding portion that protrudes from the aluminum positive electrode pole 20 (a negative electrode pole not shown is pure copper) toward the winding group 12. It is supported by being inserted into a tubular shaft core 14 which is the center of the winding group 12.
Positive electrode lead 30 extended from the positive electrode current collector of winding group 12
Are bundled and ultrasonically welded to the positive electrode pole 20 with a holding metal (not shown) interposed therebetween. The positive pole 20 is fixed to the battery cover 18 by incorporating an insulating ring 26, an O-ring 28, and a battery cover 18 and fastening the nut 22 via an insulating washer 24 via the insulating washer 24. Has obtained sealing pressure. The battery cover 18 is fixed to the stainless steel battery container 16 such as SUS304 by laser welding. Note that the negative electrode side is the same as the positive electrode side.
【０００５】このような有機電解質二次電池はその高容
量・高特性ゆえ、近時、有機電解質二次電池を複数個直
列又は並列に繋ぎあわせて電気自動車（ＥＶ）などの動
力源としても用いられるようになってきた。[0005] Due to the high capacity and high characteristics of such organic electrolyte secondary batteries, recently, a plurality of organic electrolyte secondary batteries are connected in series or in parallel to be used as a power source for electric vehicles (EV) and the like. It has come to be.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上述し
た二次電池を電気自動車用電源として用いる場合には、
大容量の二次電池を複数個繋ぎあわせて使用するので相
当の重量・容積となることから、二次電池単体の軽量化
・小型化が大きな課題となっている。また、二次電池を
車載する場合には、振動や急加減速による重力加速度も
加わるので、極柱部の電池容器等に対する絶縁の確保や
電解液の二次電池外への漏出防止についても安全上及び
内部短絡を回避する上でも万全を期す必要がある。However, when the above-described secondary battery is used as a power source for an electric vehicle,
Since a plurality of large-capacity secondary batteries are connected and used, the weight and volume of the secondary batteries become considerable. Therefore, reduction in weight and size of the secondary battery alone has become a major issue. In addition, when a secondary battery is mounted on a vehicle, gravitational acceleration due to vibration or rapid acceleration / deceleration is also applied, so it is safe to ensure insulation of the pole column to the battery container and to prevent electrolyte from leaking out of the secondary battery. It is necessary to make every effort to avoid the above and internal short circuit.
【０００７】本発明は上記事案に鑑み、極柱部の絶縁と
液密性を確保しつつ、軽量化・小型化を図ることができ
る捲回式二次電池を提供することを目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wound secondary battery capable of achieving weight reduction and size reduction while ensuring insulation and liquid tightness of a pole portion.
【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、本発明は、軸芯を有する捲回群が電池容器に収容さ
れ、極柱が前記電池容器内から電池蓋に形成された穴を
貫通して外部端子となり、前記電池蓋と前記極柱のフラ
ンジ部との間に電気的絶縁性を有する弾性部材を介在さ
せた捲回式二次電池において、前記極柱には該極柱の重
量を軽減するように肉抜きされた薄肉部が形成され、該
薄肉部と前記電池蓋とに電気的絶縁性を有して当接し、
前記フランジ部と前記電池蓋との間隔を前記弾性部材を
弾性変形させた状態で一定に保持する間隔保持部材を備
え、前記電池蓋は押圧力により押圧されて前記電池容器
に接合されており、前記電池蓋と前記フランジ部とは前
記弾性部材を介して前記押圧力により互いに押圧されて
おり、前記軸芯と前記極柱とは直接接触して前記押圧力
により互いに押圧されている、ことを特徴とする。本発
明では、間隔保持部材によりフランジ部と電池蓋とは弾
性部材を弾性変形させた状態で一定間隔に保持されてお
り、極柱と軸芯とは直接接触しているので、電池蓋が押
圧力により押圧されて電池容器に接合されると、電池蓋
と極柱、極柱と軸芯にはそれぞれ押圧力が加わり互いに
押圧された状態で固定される。従って、従来のように極
柱を電池蓋に固定するためのナットや金属ワッシャ等の
締結部材を用いなくても極柱を固定することができるの
で、捲回式二次電池を小型化することができる。加え
て、極柱には該極柱の重量を軽減するように肉抜きされ
た薄肉部が形成されているので、捲回式二次電池の重量
を軽減することができる。また、電池蓋と極柱とは、電
気的絶縁性を有する弾性部材と、薄肉部と電池蓋とに電
気的絶縁性を有して当接する間隔保持部材と、で絶縁さ
れているので、電気的な絶縁を保つことができる。更
に、電池蓋とフランジ部との間隔は弾性部材が弾性変形
された状態で一定に保持されるので、液密性を確保する
ことができる。In order to solve the above-mentioned problems, the present invention provides a battery container in which a winding group having a shaft core is accommodated in a battery container, and a pole formed in the battery cover from inside the battery container. And an external terminal through which an elastic member having electrical insulation is interposed between the battery lid and the flange portion of the pole, wherein the pole has the pole A thin-walled portion is formed so as to reduce the weight of the thin-walled portion, and the thin-walled portion and the battery lid are in contact with the battery lid with electrical insulation.
An interval holding member that holds the interval between the flange portion and the battery lid constant in a state where the elastic member is elastically deformed is provided, and the battery lid is pressed by a pressing force and joined to the battery container, The battery lid and the flange portion are pressed against each other by the pressing force via the elastic member, and the shaft core and the pole are in direct contact with each other and pressed against each other by the pressing force. Features. In the present invention, the flange portion and the battery lid are held at a fixed interval by the spacing member in a state where the elastic member is elastically deformed, and the pole and the shaft core are in direct contact with each other. When pressed by pressure and joined to the battery container, pressing force is applied to the battery cover and the pole, and the pole and the shaft core, and the battery lid and the pole are fixed in a pressed state to each other. Therefore, since the pole can be fixed without using a fastening member such as a nut or a metal washer for fixing the pole to the battery lid as in the related art, it is possible to reduce the size of the wound secondary battery. Can be. In addition, since the pole column is formed with a thinned portion that is thinned to reduce the weight of the pole column, the weight of the wound secondary battery can be reduced. Also, since the battery lid and the pole are insulated by the elastic member having electrical insulation and the spacing member contacting the thin portion and the battery lid with electrical insulation, the electric pole is electrically insulated. Insulation can be maintained. Further, the distance between the battery lid and the flange portion is kept constant in a state where the elastic member is elastically deformed, so that liquid tightness can be ensured.
【０００９】この場合において、間隔保持部材を、押圧
力に対して剛性を有する棒状部材と、この棒状部材と少
なくとも薄肉部及び電池蓋のいずれか一方とを電気的に
絶縁するようにこの棒状部材を覆う絶縁部材と、で構成
するようにすれば、棒状部材は押圧力に対して剛性を有
しているので、電池蓋とフランジ部との間隔を一定に保
持して弾性部材が弾性変形された状態を維持し、液密性
を維持することができると共に、絶縁部材により棒状部
材は薄肉部及び電池蓋の少なくともいずれか一方と電気
的に絶縁するように覆われているので、電池蓋と極柱と
の絶縁が確保される。また、間隔保持部材を複数個備え
るようにすれば、電池蓋とフランジ部との間は複数の間
隔保持部材により一定間隔に保持されるので、弾性部材
が均等に弾性変形され液密性を更に高めることができ
る。更に、絶縁部材の材質をポリプロピレンとすれば、
ポリプロピレンは電解液に対する耐食性に優れ、適度な
柔軟性を有するので、電気的絶縁性を維持することがで
きると共に、絶縁部材を覆うことが容易となる。また、
薄肉部を、極柱の外周近傍から内周側に形成された環状
溝とし、環状溝を極柱の強度を維持する仕切により複数
に分割すれば、環状溝の直径を大きくすることができる
ので、肉抜きされる体積が大きくなり捲回式二次電池の
軽量化を図ることができると共に、仕切により極柱の強
度を維持することができる。そして、電池蓋と極柱との
間を絶縁する絶縁シートを更に備えるようにすれば、電
池蓋と極柱とは絶縁シートにより更に絶縁されるので、
高い電気的絶縁性を確保することができる。In this case, the spacing member is formed of a rod-shaped member having rigidity against a pressing force, and the rod-shaped member is electrically insulated from at least one of the thin portion and the battery cover. And the insulating member that covers the battery, the rod-shaped member has rigidity against the pressing force, so that the elastic member is elastically deformed while maintaining a constant distance between the battery lid and the flange portion. And the liquid-tightness can be maintained, and the rod-shaped member is covered by the insulating member so as to be electrically insulated from at least one of the thin portion and the battery cover. Insulation from the pole is ensured. Also, if a plurality of spacing members are provided, the space between the battery lid and the flange portion is held at a constant interval by the plurality of spacing members, so that the elastic members are evenly elastically deformed to further improve liquid tightness. Can be enhanced. Furthermore, if the material of the insulating member is polypropylene,
Polypropylene is excellent in corrosion resistance to an electrolytic solution and has appropriate flexibility, so that it is possible to maintain electrical insulation and to easily cover an insulating member. Also,
If the thin portion is an annular groove formed from the vicinity of the outer periphery of the pole to the inner periphery and the annular groove is divided into a plurality of partitions by maintaining the strength of the pole, the diameter of the annular groove can be increased. In addition, the volume of the hollowed-out secondary battery is increased, the weight of the wound secondary battery can be reduced, and the strength of the pole can be maintained by the partition. And if it further comprises an insulating sheet that insulates between the battery lid and the pole, since the battery lid and the pole are further insulated by the insulating sheet,
High electrical insulation can be ensured.
【００１０】[0010]
【発明の実施の形態】（第１実施形態）以下、本発明に
係る捲回式二次電池を車載用リチウムイオン二次電池
（以下、リチウム電池という。）に適用した第１の実施
の形態について説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) Hereinafter, a first embodiment in which a wound type secondary battery according to the present invention is applied to a lithium ion secondary battery for a vehicle (hereinafter, referred to as a lithium battery). Will be described.
【００１１】[構成]図１に示すように、リチウム電池１
０は、ステンレス製（ＳＵＳ３０４）で円筒状の電池容
器１６を備えている。電池容器１６の中心部には、外径
φ１６ｍｍ、内径φ１４ｍｍ、長さ３６０ｍｍのポリプ
ロピレン（ＰＰ）又はポリエチレン（ＰＥ）製の円筒状
軸芯１４が配置されている。この軸芯１４の周囲には、
帯状の正極板及び負極板がセパレータを介して断面渦巻
状に捲回された捲回群１２が配置されている。[Structure] As shown in FIG.
No. 0 has a cylindrical battery container 16 made of stainless steel (SUS304). A cylindrical shaft core 14 made of polypropylene (PP) or polyethylene (PE) having an outer diameter of 16 mm, an inner diameter of 14 mm, and a length of 360 mm is arranged at the center of the battery container 16. Around this shaft core 14,
A winding group 12 in which a belt-like positive electrode plate and a negative electrode plate are spirally wound in cross section via a separator is arranged.
【００１２】図２に示すように、正極板１２Ａは、厚さ
２０μｍのアルミニウム箔からなる正極集電体１２Ａａ
と、この正極集電体１２Ａａの両面に塗布された正極活
物質層１２Ａｂと、を有している。正極活物質層１２Ａ
ｂは、コバルト酸リチウム（ＬｉＣｏＯ２）と非晶質炭
素とポリフッ化ビニリデン（ＰＶＤＦ）とを、Ｎ−メチ
ル２ピロリドン（ＮＭＰ）に分散して得られたスラリ
を、正極集電体１２Ａａの両面に均一に塗布し、乾燥さ
せた後、ロールプレス機で圧縮成型して長さ６９００ｍ
ｍ、幅３４０ｍｍ＋未塗工部４０ｍｍ、厚さ１７４μｍ
としたものである。As shown in FIG. 2, the positive electrode plate 12A has a positive electrode current collector 12Aa made of aluminum foil having a thickness of 20 μm.
And a positive electrode active material layer 12Ab applied to both surfaces of the positive electrode current collector 12Aa. Positive electrode active material layer 12A
b is a slurry obtained by dispersing lithium cobaltate (LiCoO 2 ), amorphous carbon, and polyvinylidene fluoride (PVDF) in N-methyl-2-pyrrolidone (NMP), on both surfaces of the positive electrode current collector 12Aa. And then dried and then compression molded with a roll press machine to a length of 6900 m
m, width 340 mm + uncoated part 40 mm, thickness 174 μm
It is what it was.
【００１３】一方、負極板１２Ｂは、厚さ１０μｍの銅
箔からなる負極集電体１２Ｂａと、この負極集電体１２
Ｂａの両面に塗布された負極活物質層１２Ｂｂと、を有
している。負極活物質層１２Ｂｂは、黒鉛とＰＶＤＦと
を、ＮＭＰに分散して得られたスラリを、負極集電体１
２Ｂａの両面に均一に塗布し、乾燥させた後、ロールプ
レス機で圧縮成型して長さ７０００ｍｍ、幅３５０ｍｍ
＋未塗工部４０ｍｍ、厚さ１７４μｍとしたものであ
る。On the other hand, the negative electrode plate 12B is composed of a negative electrode current collector 12Ba made of copper foil having a thickness of 10 μm and a negative electrode current collector 12Ba.
And negative electrode active material layers 12Bb applied to both surfaces of Ba. The negative electrode active material layer 12Bb is a slurry obtained by dispersing graphite and PVDF in NMP, and the negative electrode current collector 1
After uniformly coated on both sides of 2Ba and dried, it is compression-molded with a roll press machine to have a length of 7000 mm and a width of 350 mm.
+ The uncoated portion was 40 mm and the thickness was 174 μm.
【００１４】セパレータ１２Ｃは、厚さ４１μｍの微多
孔性のＰＥ製フィルムからなり、正極板１２Ａ及び負極
板１２Ｂの接触を避けるために、両極板より寸法の大き
い、長さ７７００ｍｍ、幅３５９ｍｍとされている。The separator 12C is made of a microporous PE film having a thickness of 41 μm, and has dimensions of 7700 mm in length and 359 mm in width, which are larger than those of the two electrodes, in order to avoid contact between the positive electrode 12A and the negative electrode 12B. ing.
【００１５】正極板１２Ａからは正極リード３０が延出
されている。この正極リード３０は、正極集電体１２Ａ
ａのスラリ未塗布部を、幅１０ｍｍ、長さ３５ｍｍ、ピ
ッチ４０ｍｍおきに短冊状にカットして束ねたものであ
る。また、図１に示すように、負極板１２Ｂからも正極
板１２Ａと同様に、負極リード４２が延出されている。A positive electrode lead 30 extends from the positive electrode plate 12A. The positive electrode lead 30 is made of a positive electrode current collector 12A.
The slurry-uncoated portion (a) is cut into a strip shape with a width of 10 mm, a length of 35 mm, and a pitch of 40 mm, and bundled. Also, as shown in FIG. 1, a negative electrode lead 42 extends from the negative electrode plate 12B, similarly to the positive electrode plate 12A.
【００１６】図２に示すように、電池容器１６の端部
は、ステンレス製で円盤状の電池蓋１８により封口され
ている。電池蓋１８の中央部には円形穴が形成されてい
る。電池蓋１８の円形穴の周縁と電池蓋１８の外周との
ほぼ中間の同一円上内壁側からは、捲回群１２方向へ突
出したステンレス製の固定ピン３４が３個立設されてい
る。これらの固定ピン３４は小径部と大径部とを有する
二段構造の円柱状の形状とされており、小径部の先端端
面が電池蓋１８の内壁にレーザ溶接で溶着されている。
固定ピン３４の大径部は電気的絶縁性及び弾性を有する
ＰＰ製で円筒状の絶縁部材としての絶縁チューブ３６に
より覆われている。絶縁チューブ３６の電池蓋１８とは
反対側の先端部は球面とされており、この球面を切断す
る円錐面は絶縁チューブ３６の外径より大きな直径を有
している。As shown in FIG. 2, the end of the battery case 16 is sealed with a disc-shaped battery cover 18 made of stainless steel. A circular hole is formed in the center of the battery cover 18. Three stainless steel fixing pins 34 protruding in the direction of the winding group 12 are provided upright from the same circular inner wall side substantially at the middle between the periphery of the circular hole of the battery cover 18 and the outer periphery of the battery cover 18. These fixing pins 34 have a two-stage cylindrical shape having a small-diameter portion and a large-diameter portion, and the distal end surface of the small-diameter portion is welded to the inner wall of the battery cover 18 by laser welding.
The large diameter portion of the fixing pin 34 is covered with an insulating tube 36 made of PP having electrical insulation and elasticity and serving as a cylindrical insulating member. The distal end of the insulating tube 36 on the side opposite to the battery lid 18 is formed into a spherical surface, and the conical surface cutting this spherical surface has a diameter larger than the outer diameter of the insulating tube 36.
【００１７】また、リチウム電池１０は、電池容器１６
の内部にアルミニウム製で略コマ状の正極極柱２０を備
えている。正極極柱２０は、電池容器１６の内径より若
干小径の円盤部を有している。図３に示すように、この
円盤部には円盤部を肉抜きするように外周近傍から内周
側に薄肉部としての環状溝２０Ａが形成されており、更
に、環状溝２０Ａは円盤部に所定強度を持たせるための
仕切２０Ｃにより３個の陥没部に分割されている。ま
た、これらの陥没部にはそれぞれ圧入穴２０Ｄが形成さ
れており、図２に示すように、この圧入穴２０Ｄに絶縁
チューブ３６で覆われた固定ピン３４の大径部が電池蓋
１８側から圧入され絶縁チューブ３６の円錐面で正極極
柱２０に係止・固定されている。正極極柱２０の円盤部
の中央からは捲回群１２方向へ円筒状の突出部が突出形
成されており、突出部は軸芯１４の内径に挿入されてい
る。更に、円盤部には突出部の反対側から突出部と同径
の円筒部が電池蓋１８の円形穴方向に外部端子となるよ
うに突出形成されている。正極極柱２０にはネジ孔２０
Ｂが形成されており、図示しないブスバ固定ネジが螺着
できるようになっている。なお、円筒部端面は電池蓋１
８の外壁面と同一面となるように各部材の寸法が定めら
れている。The lithium battery 10 includes a battery container 16.
And a substantially coma-shaped positive electrode pole 20 made of aluminum. The positive electrode pole 20 has a disk part having a diameter slightly smaller than the inner diameter of the battery container 16. As shown in FIG. 3, an annular groove 20A as a thin portion is formed in the disk portion from the vicinity of the outer periphery to the inner peripheral side so as to remove the thickness of the disk portion. It is divided into three depressed portions by a partition 20C for imparting strength. Press-in holes 20D are formed in these depressions, respectively. As shown in FIG. 2, a large-diameter portion of the fixing pin 34 covered with the insulating tube 36 is formed in the press-in hole 20D from the battery lid 18 side. It is press-fitted and locked and fixed to the positive pole 20 by the conical surface of the insulating tube 36. From the center of the disk portion of the positive electrode pole 20, a cylindrical protrusion is formed to protrude in the direction of the winding group 12, and the protrusion is inserted into the inner diameter of the shaft core. Further, a cylindrical portion having the same diameter as the protruding portion is formed on the disk portion so as to be an external terminal in a circular hole direction of the battery cover 18 from the opposite side of the protruding portion. A screw hole 20 is formed in the positive pole 20.
B is formed so that a bus bar fixing screw (not shown) can be screwed therein. Note that the end face of the cylindrical portion is the battery cover 1.
The dimensions of each member are determined so as to be on the same plane as the outer wall surface 8.
【００１８】正極極柱２０のフランジ部と電池蓋１８と
の間には、セラミック製の絶縁リング２６及びゴム（Ｅ
ＰＤＭ）製で弾性を有する弾性部材としてのＯリング２
８が介在している。更に、正極極柱２０と電池蓋１８と
の間には、図３に示すように、正極極柱２０と電池蓋１
８とを絶縁する円形状の絶縁シートとしての絶縁テープ
４４が介在している。なお、絶縁テープ４４には、その
中央部に正極極柱２０の円筒部及び絶縁リング２６を挿
通させるための中央穴４４Ａ及び絶縁チューブ３６で覆
われた固定ピン３４を挿通させるための絶縁チューブ挿
通穴４４Ｂが形成されている。A ceramic insulating ring 26 and a rubber (E) are provided between the flange of the positive pole 20 and the battery cover 18.
O-ring 2 as an elastic member made of PDM)
8 are interposed. Further, between the positive electrode pole 20 and the battery cover 18, as shown in FIG.
An insulating tape 44 as a circular insulating sheet that insulates the insulating tape 8 is provided. The insulating tape 44 has a central portion through which the cylindrical portion of the positive pole 20 and the insulating ring 26 are inserted, and a central hole 44A through which the fixing pin 34 covered with the insulating tube 36 is inserted. A hole 44B is formed.
【００１９】また、図２に示すように、束ねられた正極
リード３０の先端部は図示しない押さえ金具を挟んで超
音波溶接により正極極柱２０の周縁部に溶着されてい
る。そして、捲回群１２、正極リード３０及び正極極柱
２０の周縁部と電池容器１６とが直接接触しないように
図示しない絶縁フィルムが電池容器１６の内径側に配置
されている。なお、負極側も正極側と同様に構成されて
おり、負極極柱４８（図１参照）の材質は純銅とされて
いる。また、リチウム電池１０は、例えば、充電器の故
障等により過充電時に電池内部の圧力が所定圧以上に上
昇したときに開裂して電池内部の圧力を低下させる図示
しない開裂弁を備えており、この開裂弁は絶縁チューブ
３６と抵触しない位置に配置されている。As shown in FIG. 2, the tip of the bundled positive electrode lead 30 is welded to the peripheral portion of the positive electrode pole 20 by ultrasonic welding with a holding metal (not shown) interposed therebetween. An insulating film (not shown) is arranged on the inner diameter side of the battery case 16 so that the peripheral portions of the wound group 12, the positive electrode lead 30, and the positive electrode column 20 do not directly contact the battery case 16. In addition, the negative electrode side is configured similarly to the positive electrode side, and the material of the negative electrode pole 48 (see FIG. 1) is pure copper. In addition, the lithium battery 10 is provided with a cleavage valve (not shown) that cleaves when the pressure inside the battery rises to a predetermined pressure or more during overcharge due to a failure of a charger or the like and reduces the pressure inside the battery, for example. This cleavage valve is arranged at a position where it does not conflict with the insulating tube 36.
【００２０】[作製方法]まず、正極集電体１２Ａａ及び
負極集電体１２Ｂａのスラリ未塗布部を短冊状にカット
して正極リード３０及び負極リード４２を形成し、正極
板１２Ａ及び負極板１２Ｂを両者が接触しないようにセ
パレータ１２Ｃを介して軸芯１４の周囲に渦巻状に捲回
する。この捲回により正極リード３０及び負極リード４
２はそれぞれのリードが集まるように巻き取られる。次
いで、正極リード３０をリード群に束ねた後、捲芯１４
の内径に正極極柱２０の突出部を挿入し、前記リード群
の先端部を正極極柱２０の周縁部に超音波溶接する。捲
回群１２及び正極極柱２０に図示しない絶縁フィルムを
巻き付けて電池容器１６内に挿入する。[Preparation Method] First, the uncoated portion of the positive electrode current collector 12Aa and the negative electrode current collector 12Ba is cut into strips to form the positive electrode lead 30 and the negative electrode lead 42, and the positive electrode plate 12A and the negative electrode plate 12B are formed. Is spirally wound around the shaft core 14 via the separator 12C so that they do not come into contact with each other. By this winding, the positive electrode lead 30 and the negative electrode lead 4
2 is wound so that each lead gathers. Next, after bundling the positive electrode lead 30 into a lead group, the core 14
The protruding portion of the positive electrode pole 20 is inserted into the inside diameter of the electrode group, and the tip of the lead group is ultrasonically welded to the peripheral edge of the positive electrode pole 20. An insulating film (not shown) is wound around the winding group 12 and the positive pole 20 and inserted into the battery container 16.
【００２１】次に、正極極柱２０のフランジ部と電池蓋
１８との間に絶縁リング２６、Ｏリング２８を、更に、
正極極柱２０と電池蓋１８との間に絶縁テープ４４を介
在させ、絶縁テープ４４に形成された中央穴４４Ａ及び
絶縁チューブ挿通穴４４Ｂに、それぞれ、正極極柱２０
の円筒部及び絶縁リング２６、絶縁チューブ３４に覆わ
れた固定ピン３４を挿通させ、絶縁チューブ３６の先端
部を圧入穴２０Ｄの位置に位置決めして、電池蓋１８を
押圧して電池容器１６と電池蓋１８との境界部をレーザ
溶接により溶着する。なお、説明を省略した負極側も同
様である。Next, an insulating ring 26 and an O-ring 28 are further provided between the flange portion of the positive pole 20 and the battery cover 18.
An insulating tape 44 is interposed between the positive electrode pole 20 and the battery cover 18, and the positive electrode pole 20 is inserted into a central hole 44A and an insulating tube insertion hole 44B formed in the insulating tape 44, respectively.
Of the insulating tube 36, the distal end portion of the insulating tube 36 is positioned at the position of the press-fitting hole 20D, and the battery cover 18 is pressed to The boundary with the battery lid 18 is welded by laser welding. The same applies to the negative electrode side whose description is omitted.
【００２２】更に、図示しない注液口からエチレンカー
ボネート（ＥＣ）、ジメチルカーボネート（ＤＭＣ）、
ジエチルカーボネート（ＤＥＣ）の混合溶液中に６フッ
化リン酸リチウム（ＬｉＰＦ６）を１モル／リットルの
割合で溶解した非水電解液（有機電解液）を注液して正
極活物質及び負極活物質間に充填し、注液口を封口す
る。そして、所定時間、所定定電圧・定電流で充電して
リチウム電池１０を完成させる。Further, ethylene carbonate (EC), dimethyl carbonate (DMC),
A non-aqueous electrolyte solution (organic electrolyte solution) in which lithium hexafluorophosphate (LiPF 6 ) was dissolved at a ratio of 1 mol / liter in a mixed solution of diethyl carbonate (DEC) was injected to form a positive electrode active material and a negative electrode active material. Fill the space between the substances and close the injection port. Then, the lithium battery 10 is completed by charging at a predetermined constant voltage and constant current for a predetermined time.
【００２３】（第２実施形態）次に、本発明に係る捲回
式二次電池を車載用リチウム電池に適用した第２の実施
の形態について説明する。なお、本実施形態において第
１実施形態と同一の部材には同一の符号を付しその説明
を省略し、異なる箇所のみ説明する。(Second Embodiment) Next, a description will be given of a second embodiment in which the wound secondary battery according to the present invention is applied to an in-vehicle lithium battery. In this embodiment, the same members as those of the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Only different points will be described.
【００２４】図４に示すように、本実施形態のリチウム
電池１１では、電池蓋１８の円形穴の周縁と電池蓋１８
の外周とのほぼ中間の同一円上内壁側から捲回群１２方
向へ突出したステンレス製で円柱状の固定ピン３８が３
個立設されている。この固定ピン３８は電気的絶縁性及
び弾性を有するＰＰ製で円筒状の絶縁部材としての絶縁
チューブ４０で覆われている。絶縁チューブ４０の電池
蓋１８とは反対側の先端部外径は縮径されており、絶縁
チューブ４０の縮径された先端部が圧入穴２０Ｄに圧入
可能とされ、縮径された絶縁チューブ４０の外径端面が
陥没部と当接するようになっている。As shown in FIG. 4, in the lithium battery 11 of this embodiment, the periphery of the circular hole of the battery
A stainless steel cylindrical fixing pin 38 protruding in the direction of the winding group 12 from the inner wall side on the same circle substantially intermediate with the outer periphery of
It is erected individually. The fixing pin 38 is covered with an insulating tube 40 as a cylindrical insulating member made of PP having electrical insulation and elasticity. The outer diameter of the distal end of the insulating tube 40 opposite to the battery cover 18 is reduced, and the reduced distal end of the insulating tube 40 is press-fittable into the press-fit hole 20D. Has an outer diameter end surface which comes into contact with the depression.
【００２５】リチウム電池１１を作製するには、固定ピ
ン３８及び絶縁チューブ４０の先端部を陥没部に形成さ
れた圧入穴２０Ｄに圧入可能なように位置決めした後、
蓋１８を４０ｋｇ／ｃｍ２の押圧力で押し付けながら電
池容器１６と蓋１８との境界部をレーザ溶接により溶着
する。なお、本実施形態では、第１実施形態より小さい
押圧力で押し付けることから液密性を高めるために第１
実施形態で使用したＯリング２８の断面径よりやや大き
めの断面径を有するＯリング２９を使用した。In order to manufacture the lithium battery 11, the fixing pin 38 and the distal end of the insulating tube 40 are positioned so as to be press-fittable into the press-fitting hole 20D formed in the depression,
While pressing the cover 18 with a pressing force of 40 kg / cm 2 , the boundary between the battery container 16 and the cover 18 is welded by laser welding. In the present embodiment, the first pressing is performed with a smaller pressing force than the first embodiment.
An O-ring 29 having a cross-sectional diameter slightly larger than the cross-sectional diameter of the O-ring 28 used in the embodiment was used.
【００２６】（作用等）以上の実施形態のリチウム電池
１０、１１では、３個の固定ピン３４、３８及び絶縁チ
ューブ３６、４０により電池蓋１８の内壁と正極極柱２
０のフランジ部との間隔が均一かつ一定に保たれ、Ｏリ
ング２８、２９が正極極柱２０のフランジ部と電池蓋１
８の内壁とに圧接されるので、Ｏリング２８、２９は均
等に弾性変形して電池容器１６内部の発電要素は外気か
ら遮断される。このため、リチウム電池１０、１１から
は電解液の液漏れ（リーク）が生じない（液密性を高め
ることができる）。(Operation and the Like) In the lithium batteries 10 and 11 of the above embodiments, the inner wall of the battery cover 18 and the positive pole 2 are fixed by three fixing pins 34 and 38 and insulating tubes 36 and 40.
0 is kept uniform and constant, and the O-rings 28 and 29 are connected to the flange of the positive pole 20 and the battery cover 1.
Since the O-rings 28 and 29 are uniformly elastically deformed because they are pressed against the inner wall of the battery 8, the power generating element inside the battery container 16 is shut off from the outside air. For this reason, the electrolyte does not leak from the lithium batteries 10 and 11 (liquid tightness can be improved).
【００２７】また、以上の実施形態では、Ｏリング２
８、２９、絶縁リング２６、絶縁チューブ３６、４０及
び図示しない絶縁フィルムの介在により、正極極柱２
０、正極リード３０及び捲回群１２と、電池蓋１８及び
電池容器１６と、は電気的に絶縁されているので、正極
極柱２０と電池蓋１８及び電池容器１６との内部短絡は
生じない。In the above embodiment, the O-ring 2
8, 29, the insulating ring 26, the insulating tubes 36 and 40, and the insulating film (not shown),
Since the positive electrode lead 30 and the winding group 12 are electrically insulated from the battery cover 18 and the battery container 16, no internal short circuit occurs between the positive electrode pole 20 and the battery cover 18 and the battery container 16. .
【００２８】更に、以上の実施形態では、固定ピン３
４、３８及び絶縁チューブ３６、４０により電池蓋１８
と環状溝２０Ａとの間隔は一定に保持されており、正極
極柱２０と軸芯１４とは直接接触しているので、電池蓋
１８が押圧されて電池容器１６に溶接されると、Ｏリン
グ２８、２９は弾性変形して反発力が生じ、電池蓋１８
と正極極柱２０と、正極極柱２０と軸芯１４と、には押
圧力が加わり互いに押圧された状態で固定される。従っ
て、図５に示した従来例の電池のように正極極柱２０
（及び負極極柱）を固定するためのナット２２、電池蓋
１８と正極極柱２０とを絶縁するための絶縁ワッシャ２
４を使用しなくても正極極柱を固定することができる。
また、これらの締結部材がない分、リチウム電池１０、
１１の長さを短くすることができる。更に、ナット２２
で固定するために正極極柱２０の円筒部を電池蓋１８か
ら電池蓋１８の外部に延出させる必要がないので、リチ
ウム電池１０、１１の長さを短くすることができる。Further, in the above embodiment, the fixing pin 3
4 and 38 and insulating tubes 36 and 40
And the annular groove 20A is kept constant, and the positive electrode pole 20 and the shaft core 14 are in direct contact with each other. Therefore, when the battery cover 18 is pressed and welded to the battery case 16, the O-ring is formed. 28 and 29 are elastically deformed to generate a repulsive force, and the battery cover 18
And the positive electrode pole 20, and the positive electrode pole 20 and the shaft core 14 are fixed in a state where pressing force is applied and pressed against each other. Therefore, as in the conventional battery shown in FIG.
(And a negative electrode 22) for fixing the negative electrode pole, and an insulating washer 2 for insulating the battery cover 18 from the positive electrode pole 20.
The positive electrode pole can be fixed without using 4.
In addition, since these fastening members are not provided, the lithium battery 10,
11 can be shortened. Further, the nut 22
It is not necessary to extend the cylindrical portion of the positive electrode pole 20 from the battery cover 18 to the outside of the battery cover 18 in order to fix the lithium battery 10, so that the length of the lithium batteries 10 and 11 can be reduced.
【００２９】また、正極極柱２０に外周近傍から内周側
に環状溝２０Ａを形成したので、直径が大きくなること
から肉抜きされる体積が大きくなり、リチウム電池１
０、１１の軽量化を図ることができる。更に、環状溝２
０Ａを仕切２０Ｃにより区切りアルミニウム製の正極極
柱２０に強度を持たせたので、電池作製時に電池蓋１８
に所定の押圧力を掛けても正極極柱２０が破損すること
もなく、車載したときの振動や急加減速による重力加速
度に耐えることができる。Also, since the annular groove 20A is formed in the positive electrode pole 20 from the vicinity of the outer periphery to the inner periphery, the diameter of the groove is increased, so that the volume to be cut is increased, and the lithium battery 1
The weight of 0 and 11 can be reduced. Further, the annular groove 2
0A is separated by a partition 20C so that the aluminum positive electrode pole 20 has strength.
Even if a predetermined pressing force is applied to the positive electrode pole 20, the positive electrode pole 20 is not damaged, and can withstand vibration when mounted on a vehicle or gravitational acceleration due to rapid acceleration / deceleration.
【００３０】また、絶縁チューブ３６、４０の材質をポ
リプロピレンとしたので、電解液に対する腐食性に優れ
電気的絶縁性を維持することができると共に、適度の柔
軟性を有し簡単に固定ピン３４、突起３８を覆うことが
でき、更に、圧入穴２０Ｄに圧入することが容易とな
る。Further, since the material of the insulating tubes 36 and 40 is made of polypropylene, the insulating pins 36 and 40 are excellent in corrosiveness to an electrolytic solution, can maintain electrical insulation, and have appropriate flexibility and can be easily fixed. The protrusion 38 can be covered, and further, it becomes easy to press-fit the press-fit hole 20D.
【００３１】また更に、電池蓋１８と正極極柱２０との
間に絶縁テープ４４を介在させたので、これらの部材間
の電気的絶縁性を更に高めることができる。なお、以上
の作用等については負極側でも同じである。Furthermore, since the insulating tape 44 is interposed between the battery cover 18 and the positive electrode pole 20, the electrical insulation between these members can be further enhanced. Note that the above operation and the like are the same on the negative electrode side.
【００３２】（試験等）次に、このようにして作製した
第１実施形態及び第２実施形態のリチウム電池１０、１
１（以下、実施例１、２の電池という。）について、重
量及び長さを実測すると共に、リーク試験を行った。な
お、実施例の電池の効果を確認するために同時に作製し
た、図５に示した従来例の電池（以下、比較例の電池と
いう。）についても併せて記載する。(Tests and the Like) Next, the lithium batteries 10 and 1 of the first and second embodiments manufactured in this manner were manufactured.
1 (hereinafter referred to as batteries of Examples 1 and 2) was measured for weight and length, and a leak test was performed. In addition, the battery of the conventional example (hereinafter, referred to as a battery of the comparative example) shown in FIG. 5 which was simultaneously manufactured to confirm the effect of the battery of the example is also described.
【００３３】実施例及び比較例の各電池の重量及び長さ
の実測結果を下表１に示す。表１に示すように、実施例
の電池では、比較例の電池に対し、重量で９０ｇ以上軽
量化することができ、また、長さで３１ｍｍ小さくする
ことができた。従って、リチウム電池１０、１１を複数
個繋ぎあわせて使用する場合には、相当の軽量化・小型
化を図ることができることが分かった。Table 1 below shows the actual measurement results of the weight and length of each battery of the examples and comparative examples. As shown in Table 1, in the battery of the example, the weight of the battery of the comparative example could be reduced by 90 g or more, and the length could be reduced by 31 mm. Therefore, it has been found that when a plurality of lithium batteries 10 and 11 are connected and used, a considerable reduction in weight and size can be achieved.
【００３４】[0034]
【表１】 [Table 1]
【００３５】また、実施例及び比較例の電池を下表２に
示す条件で振動を与え、リークの有無を確認した。この
リーク試験の結果、実施例及び比較例の電池からは電解
液の液漏れは発生しなかった。従って、小型化・軽量化
されたリチウム電池１０、１１を車載しても振動や急加
減速による電解液の液漏れが生じない（液密性が確保さ
れている）ことが確認された。The batteries of Examples and Comparative Examples were vibrated under the conditions shown in Table 2 below, and the presence or absence of leakage was confirmed. As a result of this leak test, no electrolyte leakage occurred from the batteries of the example and the comparative example. Therefore, it was confirmed that even when the lithium batteries 10 and 11 reduced in size and weight were mounted on a vehicle, the electrolyte did not leak due to vibration or rapid acceleration / deceleration (liquid tightness was secured).
【００３６】[0036]
【表２】 [Table 2]
【００３７】従って、以上の実施形態のリチウム電池１
０、１１では、極柱部の絶縁及び液密性が確保され、か
つ、軽量化・小型化が図られている。Accordingly, the lithium battery 1 of the above embodiment
In Nos. 0 and 11, insulation and liquid tightness of the pole portion are ensured, and the weight and size are reduced.
【００３８】なお、以上の実施形態では、ロール状に捲
回して構成された捲回群１２を円筒状の電池容器１６に
挿入した例について説明したが、ロール状に捲回して構
成された捲回群１２を三角状、四角状等の多角状の電池
容器に挿入するようにしてもよい。In the above embodiment, the example in which the winding group 12 formed by winding into a roll is inserted into the cylindrical battery container 16 has been described, but the winding group formed by winding into a roll is described. The rotation group 12 may be inserted into a polygonal battery container such as a triangular or quadrangular shape.
【００３９】また、以上の実施形態では、リチウムイオ
ン二次電池に本発明を適用した例について説明したが、
リチウム二次電池以外の他の有機電解質電池、ニッケル
水素電池、ニッケルカドミウム電池等の他の電池系にお
いても本発明を適用することができる。In the above embodiment, an example in which the present invention is applied to a lithium ion secondary battery has been described.
The present invention can be applied to other battery systems such as an organic electrolyte battery other than a lithium secondary battery, a nickel hydride battery, and a nickel cadmium battery.
【００４０】更に、以上の実施形態では、環状溝２０Ａ
を正極極柱２０の上部側に形成した例を示したが、下部
側に形成してもよい。また、環状溝２０Ａは正極極柱２
０の軽量化を図るために肉抜きしたものであるので、正
極極柱２０の強度を維持できれば例えば四角柱や三角柱
のように環状溝以外の形状で肉抜きを行うようにしても
よい。Further, in the above embodiment, the annular groove 20A
Is formed on the upper side of the positive pole 20, but may be formed on the lower side. In addition, the annular groove 20 </ b> A is
Since the thickness is reduced in order to reduce the weight, the thickness may be reduced to a shape other than the annular groove, such as a square pole or a triangular pole, as long as the strength of the positive pole 20 can be maintained.
【００４１】そして、以上の実施形態では、各部材の寸
法、材質、形状及びリチウム電池１０、１１の製造方法
等について説明したが、本発明はこれらに限定されるも
のではなく、上述した特許請求の範囲内において他の種
々の実施形態を採ることができることはいわゆる当業者
にとって明らかである。In the above embodiments, the dimensions, materials, and shapes of the respective members, the method of manufacturing the lithium batteries 10 and 11, and the like have been described. However, the present invention is not limited to these. It will be apparent to those skilled in the art that various other embodiments can be adopted within the scope of the present invention.
【００４２】[0042]
【発明の効果】以上説明したように、本発明によれば、
間隔保持部材によりフランジ部と電池蓋とは弾性部材を
弾性変形させた状態で一定間隔に保持されており、極柱
と軸芯とは直接接触しているので、電池蓋が押圧力によ
り押圧されて電池容器に接合されると、電池蓋と極柱、
極柱と軸芯にはそれぞれ押圧力が加わり互いに押圧され
た状態で固定され、極柱を電池蓋に固定するための締結
部材を用いなくても極柱を固定することができ、捲回式
二次電池を小型化することができると共に、極柱には重
量を軽減するように肉抜きされた薄肉部が形成されてい
るので、捲回式二次電池の重量を軽減することができ
る、という効果を得ることができる。また、電池蓋と極
柱とは、電気的絶縁性を有する弾性部材と、薄肉部と電
池蓋とを電気的絶縁性を有して当接する間隔保持部材
と、で絶縁されているので、電気的な絶縁を保つことが
でき、電池蓋とフランジ部とは弾性部材が弾性変形され
た状態で所定間隔に保持されているので、液密性を確保
することができる、という効果を得ることができる。As described above, according to the present invention,
The flange portion and the battery lid are held at a constant interval by the spacing member in a state where the elastic member is elastically deformed, and the pole and the shaft core are in direct contact, so the battery lid is pressed by the pressing force. The battery cover and the pole,
A pressing force is applied to each of the pole and the shaft core, and the poles are fixed in a pressed state. The pole can be fixed without using a fastening member for fixing the pole to the battery lid. The size of the secondary battery can be reduced, and the pole column is formed with a thinned portion that is thinned to reduce the weight, so that the weight of the wound secondary battery can be reduced. The effect described above can be obtained. Further, since the battery lid and the pole are insulated by the elastic member having electrical insulation, and the space holding member that abuts the thin portion and the battery lid with electrical insulation, electrical insulation is provided. Since the battery lid and the flange portion are held at a predetermined interval in a state where the elastic member is elastically deformed, it is possible to obtain an effect that liquid tightness can be secured. it can.
【図１】本発明を適用した第１の実施の形態のリチウム
電池の概略断面図である。FIG. 1 is a schematic sectional view of a lithium battery according to a first embodiment to which the present invention is applied.
【図２】第１の実施の形態のリチウム電池の正極極柱近
傍の拡大断面図である。FIG. 2 is an enlarged cross-sectional view near a positive electrode pole of the lithium battery according to the first embodiment.
【図３】第１の実施の形態のリチウム電池の正極極柱近
傍の分解斜視図である。FIG. 3 is an exploded perspective view of the vicinity of a positive electrode pole of the lithium battery according to the first embodiment.
【図４】本発明を適用した第２の実施の形態のリチウム
電池の概略断面図である。FIG. 4 is a schematic sectional view of a lithium battery according to a second embodiment to which the present invention is applied.
【図５】従来例の有機電解質二次電池の概略断面図であ
る。FIG. 5 is a schematic sectional view of a conventional organic electrolyte secondary battery.
１０、１１ リチウム電池（捲回式二次電池） １２ 捲回群 １４ 軸芯 １６ 電池容器 １８ 電池蓋 ２０ 正極極柱 ２０Ａ 環状溝（薄肉部） ２８、２９ Ｏリング（弾性部材） ３４、３８ 固定ピン（棒状部材、間隔保持部材の一
部） ３６、４０ 絶縁チューブ（絶縁部材、間隔保持部材の
一部） ４４ 絶縁テープ（絶縁シート）10, 11 Lithium battery (wound secondary battery) 12 Wound group 14 Shaft core 16 Battery container 18 Battery lid 20 Positive electrode pole 20A Annular groove (thin part) 28, 29 O-ring (elastic member) 34, 38 Fixed Pin (bar-shaped member, part of spacing member) 36, 40 Insulation tube (insulating member, part of spacing member) 44 Insulating tape (insulating sheet)
フロントページの続き (72)発明者 弘中 健介 東京都中央区日本橋本町二丁目８番７号 新神戸電機株式会社内 Ｆターム(参考） 5H028 AA01 CC12 CC24 5H029 AJ15 AK03 AL07 AM03 AM05 AM07 BJ02 BJ14 DJ02 Continuation of the front page (72) Inventor Kensuke Hironaka 2-7-7 Nihonbashi Honcho, Chuo-ku, Tokyo F-term in Shin-Kobe Electric Co., Ltd. 5H028 AA01 CC12 CC24 5H029 AJ15 AK03 AL07 AM03 AM05 AM07 BJ02 BJ14 DJ02
Claims (6)
れ、極柱が前記電池容器内から電池蓋に形成された穴を
貫通して外部端子となり、前記電池蓋と前記極柱のフラ
ンジ部との間に電気的絶縁性を有する弾性部材を介在さ
せた捲回式二次電池において、 前記極柱には該極柱の重量を軽減するように肉抜きされ
た薄肉部が形成され、該薄肉部と前記電池蓋とに電気的
絶縁性を有して当接し、前記フランジ部と前記電池蓋と
の間隔を前記弾性部材を弾性変形させた状態で一定に保
持する間隔保持部材を備え、 前記電池蓋は押圧力により押圧されて前記電池容器に接
合されており、前記電池蓋と前記フランジ部とは前記弾
性部材を介して前記押圧力により互いに押圧されてお
り、前記軸芯と前記極柱とは直接接触して前記押圧力に
より互いに押圧されている、ことを特徴とする捲回式二
次電池。1. A winding group having a shaft core is accommodated in a battery container, and an electrode pillar penetrates a hole formed in a battery cover from inside the battery container to become an external terminal. In a wound type secondary battery in which an elastic member having electrical insulation properties is interposed between a flange portion, a thin-walled portion is formed on the pole to reduce the weight of the pole. An interval holding member that abuts on the thin portion and the battery lid with electrical insulation, and keeps a constant distance between the flange portion and the battery lid in a state where the elastic member is elastically deformed. The battery lid is pressed by a pressing force and joined to the battery container, the battery lid and the flange portion are pressed against each other by the pressing force via the elastic member, and the Directly in contact with the pole and pressed against each other by the pressing force And which, wound type secondary battery, characterized by being.
て剛性を有する棒状部材と、この棒状部材と前記薄肉部
及び前記電池蓋の少なくともいずれか一方とを電気的に
絶縁するようにこの棒状部材を覆う絶縁部材と、で構成
されたことを特徴とする請求項１に記載の捲回式二次電
池。2. The space holding member includes a rod-shaped member having rigidity with respect to the pressing force, and a rod-shaped member that is electrically insulated from at least one of the thin-walled portion and the battery lid. The wound secondary battery according to claim 1, comprising: an insulating member that covers the rod-shaped member.
特徴とする請求項１又は請求項２に記載の捲回式二次電
池。3. The wound type secondary battery according to claim 1, wherein a plurality of the spacing members are provided.
とすることを特徴とする請求項２又は請求項３に記載の
捲回式二次電池。4. The wound secondary battery according to claim 2, wherein the insulating member is made of polypropylene.
内周側に形成された環状溝であり、該環状溝は前記極柱
の強度を維持する仕切により複数に分割されたこと特徴
とする請求項１乃至請求項４のいずれか１項に記載の捲
回式二次電池。5. The thin-walled portion is an annular groove formed from the vicinity of the outer periphery of the pole to the inner periphery thereof, and the annular groove is divided into a plurality of partitions by a partition for maintaining the strength of the pole. The wound secondary battery according to any one of claims 1 to 4.
絶縁シートを更に備えたことを特徴とする請求項１乃至
請求項５のいずれか１項に記載の捲回式二次電池。6. The wound secondary battery according to claim 1, further comprising an insulating sheet for insulating between the battery cover and the pole. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23959699A JP3407699B2 (en) | 1999-08-26 | 1999-08-26 | Wound secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23959699A JP3407699B2 (en) | 1999-08-26 | 1999-08-26 | Wound secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001068164A true JP2001068164A (en) | 2001-03-16 |
| JP3407699B2 JP3407699B2 (en) | 2003-05-19 |
Family
ID=17047126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23959699A Expired - Fee Related JP3407699B2 (en) | 1999-08-26 | 1999-08-26 | Wound secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3407699B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012510143A (en) * | 2008-11-25 | 2012-04-26 | エイ １２３ システムズ，インク． | Method and design for externally applied laser welding of internal connections in high power electrochemical cells |
| JP2012204087A (en) * | 2011-03-24 | 2012-10-22 | Shin Kobe Electric Mach Co Ltd | Nonaqueous electrolyte secondary battery and lithium ion battery |
| JP2016009607A (en) * | 2014-06-25 | 2016-01-18 | 新神戸電機株式会社 | Lithium ion secondary battery and nonaqueous electrolyte secondary battery |
| CN113675509A (en) * | 2021-08-13 | 2021-11-19 | 宁波亿纬创能锂电池有限公司 | Battery sealing structure and battery |
-
1999
- 1999-08-26 JP JP23959699A patent/JP3407699B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012510143A (en) * | 2008-11-25 | 2012-04-26 | エイ １２３ システムズ，インク． | Method and design for externally applied laser welding of internal connections in high power electrochemical cells |
| JP2012204087A (en) * | 2011-03-24 | 2012-10-22 | Shin Kobe Electric Mach Co Ltd | Nonaqueous electrolyte secondary battery and lithium ion battery |
| JP2016009607A (en) * | 2014-06-25 | 2016-01-18 | 新神戸電機株式会社 | Lithium ion secondary battery and nonaqueous electrolyte secondary battery |
| CN113675509A (en) * | 2021-08-13 | 2021-11-19 | 宁波亿纬创能锂电池有限公司 | Battery sealing structure and battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3407699B2 (en) | 2003-05-19 |
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