JPH0613067A - Lithium ion secondary battery - Google Patents
Lithium ion secondary batteryInfo
- Publication number
- JPH0613067A JPH0613067A JP4170881A JP17088192A JPH0613067A JP H0613067 A JPH0613067 A JP H0613067A JP 4170881 A JP4170881 A JP 4170881A JP 17088192 A JP17088192 A JP 17088192A JP H0613067 A JPH0613067 A JP H0613067A
- Authority
- JP
- Japan
- Prior art keywords
- ptc element
- battery
- secondary battery
- ion secondary
- sealing body
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は過電流・過熱保護素子を
内蔵したリチウムイオン二次電池に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lithium ion secondary battery having a built-in overcurrent / overheat protection element.
【０００２】[0002]
【従来の技術】近年、携帯電話や携帯形ノートパソコン
等の電子機器のコードレス化、高性能、化、小型軽量
化、にはめざましいものがあり、これら電子機器の電源
となる二次電池の高容量化、高エネルギー密度化への要
求が高まってきている。二次電池としては、鉛二次電池
やニッケルカドミウム二次電池が従来から用いられてい
るが、最近ではさらに高エネルギー密度化をはかれる、
リチウムイオン二次電池のような非水電解質二次電池の
開発が進んでいる。2. Description of the Related Art In recent years, there have been remarkable improvements in cordless, high performance, high performance, small size and light weight of electronic devices such as mobile phones and portable notebook computers. The demand for higher capacity and higher energy density is increasing. As a secondary battery, a lead secondary battery or a nickel-cadmium secondary battery has been conventionally used, but recently, a higher energy density can be achieved.
Development of non-aqueous electrolyte secondary batteries such as lithium ion secondary batteries is in progress.
【０００３】しかしこれら密閉形の二次電池では、例え
ば短絡等の原因で電池内圧が上昇し、比較的急速に電池
そのものが破損し電池の機能を失ったり、周辺の機器を
破損することがあった。However, in these sealed secondary batteries, the internal pressure of the battery rises due to, for example, a short circuit, and the battery itself may be damaged relatively quickly, resulting in loss of battery function or damage to peripheral devices. It was
【０００４】例えば前記リチウムイオン二次電池では、
機器の故障あるいは誤使用等によって過充電状態や短絡
状態になると、電池内部に過電流が流れ、温度上昇が生
じる。さらに前記過充電状態や前記短絡状態が続くと、
電池内部でガスが発生し、内圧が上昇する場合がある。
このため前記二次電池に防爆機構を設けたり、正の温度
特性を持つＰＴＣ素子を安全装置として取り付ける方法
が提案されている。For example, in the lithium ion secondary battery,
If an overcharged state or a short-circuited state occurs due to a device failure, misuse, or the like, an overcurrent flows inside the battery, causing a temperature rise. Furthermore, if the overcharged state or the short-circuited state continues,
Gas may be generated inside the battery and the internal pressure may rise.
Therefore, there has been proposed a method of providing an explosion-proof mechanism to the secondary battery or attaching a PTC element having a positive temperature characteristic as a safety device.
【０００５】ところで、円筒形リチウム一次電池におい
ては、前記ＰＴＣ素子を封口体の内側に配置して外装缶
に前記封口体と共に組込んだ構造のものが知られてい
る。具体的には、前記封口体の裏面側に板状のＰＴＣ素
子を保持板と共に挟み、これら部材を環状の絶縁ガスケ
ットに挿入し、前記外装缶の上端開口部内側に配置し前
記外装缶の上端開口部をかしめることにより、前記封口
体を前記上端開口部に気密に取付け、同時に前記ＰＴＣ
素子を前記封口体及び保持板と共に前記ガスケットに保
持している。しかしながら、封口体をかしめ付けにより
前記外装缶の上端開口部に取付ける構造は封口性が劣る
という問題がある。By the way, as a cylindrical lithium primary battery, there is known a structure in which the PTC element is arranged inside a sealing body and incorporated in an outer can together with the sealing body. Specifically, a plate-shaped PTC element is sandwiched with a holding plate on the back surface side of the sealing body, these members are inserted into an annular insulating gasket, and the upper end of the outer can is placed inside the upper end opening of the outer can. By caulking the opening, the sealing body is airtightly attached to the upper end opening, and at the same time, the PTC is closed.
The element is held by the gasket together with the sealing body and the holding plate. However, the structure in which the sealing body is attached to the upper end opening of the outer can by caulking has a problem that the sealing performance is poor.
【０００６】このようなことから、前記封口体をレーザ
溶接により前記外装缶の上端開口部に取付けて封口性を
高めることが行なわれている。しかしながら、レーザ溶
接の場合には前記かしめ固定とは異なり、前記封口体の
みしか前記外装缶に取付けられない。このため、前記封
口体の裏面側に前記ＰＴＣ素子を取り付けるには、前記
かしめ固定に比べて複雑な取り付け構造になる問題があ
る。For this reason, it has been practiced to attach the sealing body to the upper end opening of the outer can by laser welding to enhance the sealing performance. However, in the case of laser welding, unlike the above-mentioned caulking fixing, only the sealing body can be attached to the outer can. Therefore, when the PTC element is attached to the back surface side of the sealing body, there is a problem that the attachment structure is more complicated than the caulking fixing.
【０００７】そこで、リードタブ付きのＰＴＣ素子を用
いて、タブ部分を正極端子部分や外装缶底部に接続する
方法が提案された。しかし、前記リードタブ付きのＰＴ
Ｃ素子がかさ高いために、電池内の限られた空間内に内
蔵することが困難であり、また、前記タブ部分を正極端
子部分に接続した場合には、前記タブ部分が電池外装缶
側面に接触して短絡を生じるという問題点があった。Therefore, there has been proposed a method of connecting the tab portion to the positive electrode terminal portion or the bottom of the outer can by using the PTC element with the lead tab. However, the PT with the lead tab
Since the C element is bulky, it is difficult to install it in a limited space inside the battery, and when the tab portion is connected to the positive electrode terminal portion, the tab portion is attached to the side surface of the battery outer can. There is a problem that they come into contact with each other to cause a short circuit.
【０００８】[0008]
【発明が解決しようとする課題】本発明は従来の問題を
解決するためになされたもので、ＰＴＣ素子の取付け構
造を簡素化することができ、かつ封口性を向上すること
が可能なリチウムイオン二次電池を提供するものであ
る。DISCLOSURE OF THE INVENTION The present invention has been made to solve the conventional problems, and it is possible to simplify the mounting structure of the PTC element and improve the sealing property of lithium ion. A secondary battery is provided.
【０００９】[0009]
【課題を解決するための手段】本発明は、発電要素を収
納した外装缶と、前記外装缶を封口する封口体と、前記
外装缶の底部に配置された板状のＰＴＣ素子と、少なく
とも前記外装缶及び前記ＰＴＣ素子の外周縁付近に亘っ
て被覆された熱収縮性の外装被覆樹脂チューブ又は外装
被覆樹脂ラベルとを備えることを特徴とする。本発明
は、前記ＰＴＣ素子の外周縁と前記外装被覆樹脂チュー
ブ又は前記外装被覆樹脂ラベルとの間に保護リングを介
装することを許容する。According to the present invention, there is provided an outer can containing a power generating element, a sealing body for sealing the outer can, a plate-shaped PTC element arranged at the bottom of the outer can, and at least the above. A heat-shrinkable outer covering resin tube or outer covering resin label covering the outer can and the outer peripheral edge of the PTC element is provided. The present invention allows a protective ring to be interposed between the outer peripheral edge of the PTC element and the exterior coating resin tube or the exterior coating resin label.
【００１０】[0010]
【作用】本発明によれば、封口体が取付けられた外装缶
底部に板状のＰＴＣ素子を配置し、熱収縮性の外装被覆
樹脂チューブ又は前記外装被覆樹脂ラベルを前記封口体
の外周縁付近、前記外装缶及び前記ＰＴＣ素子の外周縁
付近に亘って被覆し、前記樹脂チューブ又は前記樹脂ラ
ベルを熱収縮することによって、極めて簡単な構造で前
記ＰＴＣ素子を前記外装缶底部に良好な導通状態を維持
しつつ固定することができる。その結果、過充電時及び
短絡時に異常電流が流れて電池内の温度が上昇した場
合、その熱を前記外装缶底部に密着して配置された前記
ＰＴＣ素子に迅速に伝達することができる。また、前記
異常電流は前記ＰＴＣ素子にも流れる。したがって、前
記ＰＴＣ素子の正特性により所定の温度を越えて加熱さ
れると、抵抗が急激に高くなって異常電流を微小に制限
でき電池の過度の発熱を抑制できる。According to the present invention, a plate-like PTC element is arranged at the bottom of the outer can to which the sealing body is attached, and the heat-shrinkable outer covering resin tube or the outer covering resin label is provided near the outer peripheral edge of the sealing body. By covering the outer can and the PTC element around the outer peripheral edge thereof and heat-shrinking the resin tube or the resin label, the PTC element can be in a good conductive state with the bottom of the outer can with an extremely simple structure. Can be fixed while maintaining. As a result, when an abnormal current flows during overcharge and a short circuit and the temperature inside the battery rises, the heat can be quickly transferred to the PTC element arranged in close contact with the bottom of the outer can. Further, the abnormal current also flows in the PTC element. Therefore, when the PTC element is heated above a predetermined temperature due to its positive characteristics, the resistance rapidly increases, and the abnormal current can be minutely limited, so that excessive heat generation of the battery can be suppressed.
【００１１】また、ＰＴＣ素子を外装缶底部に取付ける
ことによって、従来のようにＰＴＣ素子を封口体に取付
けた場合に起こる取付け構造の複雑化を解消できると共
に前記封口体をレーザ溶接により前記外装缶の上端開口
部に取付けることができ、封口性を著しく向上すること
ができる。Further, by mounting the PTC element on the bottom of the outer can, it is possible to eliminate the complexity of the mounting structure which would occur when the PTC element is mounted on the sealing body as in the conventional case, and to laser-weld the sealing body to the outer can. Since it can be attached to the upper end opening, the sealing performance can be significantly improved.
【００１２】さらに、前記二次電池を組電池として用い
た場合、素電池自体にＰＴＣ素子が組込まれているた
め、組電池内の素電池間を繋ぐリード線に別途ＰＴＣ素
子を取付けるという煩雑な作業を解消できる。Further, when the secondary battery is used as an assembled battery, since the PTC element is incorporated in the unit cell itself, the PTC element is separately attached to the lead wire connecting the unit cells in the assembled battery, which is complicated. Work can be canceled.
【００１３】さらに、前記ＰＴＣ素子の外周縁と前記外
装被覆樹脂チューブ又は前記外装被覆樹脂ラベルとの間
に保護リングを介装することによって、前記ＰＴＣ素子
を電池外部からの衝撃より保護することができ、より高
い安全性を確保することができる。Further, by inserting a protective ring between the outer peripheral edge of the PTC element and the outer covering resin tube or the outer covering resin label, the PTC element can be protected from an impact from the outside of the battery. It is possible to secure higher safety.
【００１４】[0014]
【実施例】本発明を円筒形リチウムイオン二次電池に適
用した例について図１を参照して説明する。EXAMPLE An example in which the present invention is applied to a cylindrical lithium ion secondary battery will be described with reference to FIG.
【００１５】図１は、本実施例の円筒形リチウムイオン
二次電池を示す半裁図である。例えばステンレスからな
る有底円筒形の外装缶１は負極端子を兼ねる。積層電極
体２は、前記外装缶１内に収納されている。前記積層電
極体２は、負極３と正極４とセパレータ５とを渦巻状に
捲回して形成されている。前記負極３は活物質として例
えば炭素物質を含み、前記正極４は活物質として例えば
ＬｉＣｏＯ2 を含み、前記セパレータ５は例えば電解液
を含浸したポリプロピレン製の多孔性シートから形成さ
れている。絶縁板６は、前記外装缶１の底部内面と前記
積層電極体２との間に介装され、前記外装缶１と前記積
層電極体２とを互いに電気的に絶縁している。FIG. 1 is a semi-cut view showing a cylindrical lithium ion secondary battery of this embodiment. For example, the bottomed cylindrical outer can 1 made of stainless steel also serves as a negative electrode terminal. The laminated electrode body 2 is housed in the outer can 1. The laminated electrode body 2 is formed by spirally winding a negative electrode 3, a positive electrode 4, and a separator 5. The negative electrode 3 contains, for example, a carbon material as an active material, the positive electrode 4 contains, for example, LiCoO 2 as an active material, and the separator 5 is formed of, for example, a polypropylene porous sheet impregnated with an electrolytic solution. The insulating plate 6 is interposed between the inner surface of the bottom of the outer can 1 and the laminated electrode body 2, and electrically insulates the outer can 1 and the laminated electrode body 2 from each other.
【００１６】中央付近に穴を有する例えばステンレスか
らなる封口体７は、前記外装缶１の開口部にレーザーシ
ーム溶接によって気密に取付けられている。例えばステ
ンレスからなる正極ピン端子８は、その両端が前記封口
体７の上下面から突出するように前記封口体７の穴にガ
ラス製絶縁材９を介してハーメチックシールによって取
付けられている。例えばポリプロピレン樹脂からなる環
状のスペーサー１０は、前記外装缶１内の前記積層電極
体２上部と前記封口体７の下面の間に介装されている。
正極リード１１は、その一端が前記積層電極体２の正極
４に接続され、かつその他端が前記正極ピン端子８の下
端に接続されている。負極リード１２は、その一端が前
記積層電極体２の負極３に接続され、かつその他端が前
記外装缶１の底部内面に接続されている。A sealing body 7 made of, for example, stainless steel and having a hole in the vicinity of the center is airtightly attached to the opening of the outer can 1 by laser seam welding. The positive electrode pin terminal 8 made of, for example, stainless steel is attached to the hole of the sealing body 7 through a glass insulating material 9 by a hermetic seal so that both ends thereof protrude from the upper and lower surfaces of the sealing body 7. An annular spacer 10 made of, for example, polypropylene resin is interposed between the upper portion of the laminated electrode body 2 and the lower surface of the sealing body 7 in the outer can 1.
The positive electrode lead 11 has one end connected to the positive electrode 4 of the laminated electrode body 2 and the other end connected to the lower end of the positive electrode pin terminal 8. One end of the negative electrode lead 12 is connected to the negative electrode 3 of the laminated electrode body 2, and the other end is connected to the inner surface of the bottom of the outer can 1.
【００１７】円板状のＰＴＣ素子１３は、前記外装缶１
底部外面に配置されている。例えばステンレスからなる
端子板１４は、前記ＰＴＣ素子１３の底面に配置されて
いる。例えばポリプロピレンからなる保護リング１５
は、前記ＰＴＣ素子１３及び前記端子板１４の外周縁と
側面と前記端子板１４の底面周縁を囲むように配置さ
れ、前記ＰＴＣ素子１３と前記端子板１４とを外部から
の衝撃より保護している。加熱収縮性を有する外装被覆
樹脂チューブ１６は、前記封口体７の上部周縁、前記外
装缶１及び前記保護リング１５の外周面と底面周縁付近
に亘って覆い、加熱収縮によって、前記外装缶１底部に
前記ＰＴＣ素子１３及び前記端子板１４を前記保護リン
グ１５を介して取付けている。The disk-shaped PTC element 13 is the outer can 1
It is located on the outer surface of the bottom. The terminal plate 14 made of, for example, stainless steel is arranged on the bottom surface of the PTC element 13. Protective ring 15 made of polypropylene, for example
Are arranged so as to surround the outer peripheral edges and side surfaces of the PTC element 13 and the terminal board 14 and the peripheral edge of the bottom surface of the terminal board 14, and protect the PTC element 13 and the terminal board 14 from an external impact. There is. The heat-shrinkable outer covering resin tube 16 covers the upper peripheral edge of the sealing body 7, the outer peripheral surface of the outer can 1 and the protection ring 15 and the vicinity of the bottom peripheral edge thereof, and the heat shrinks the outer can 1 bottom portion. The PTC element 13 and the terminal plate 14 are attached to the above via the protection ring 15.
【００１８】このような構成によれば、封口体７が取付
けられた外装缶１底部に円板状のＰＴＣ素子１３及び端
子板１４を順次配置すると共に保護リング１５を前記Ｐ
ＴＣ素子１３及び前記端子板１４を囲むように配置し、
熱収縮性の外装被覆樹脂チューブ１６を前記封口体７、
前記外装缶１及び前記保護リング１５の外周面と底面周
縁付近に亘って被覆し、前記樹脂チューブ１６を熱収縮
することによって、前記ＰＴＣ素子１３を前記外装缶１
底部に良好な導通状態を維持しつつ固定することができ
る。その結果、極めて簡単な構造で前記ＰＴＣ素子１３
をリチウムイオン二次電池に組込むことができる。According to this structure, the disc-shaped PTC element 13 and the terminal plate 14 are sequentially arranged on the bottom of the outer can 1 to which the sealing body 7 is attached, and the protective ring 15 is formed on the P side.
Arranged so as to surround the TC element 13 and the terminal board 14,
The heat-shrinkable exterior coating resin tube 16 is attached to the sealing body 7,
The PTC element 13 is covered with the outer can 1 and the protection ring 15 so as to cover the outer peripheral surface and the periphery of the bottom surface and the resin tube 16 is heat-shrinked.
It can be fixed to the bottom portion while maintaining good conduction. As a result, the PTC element 13 has an extremely simple structure.
Can be incorporated into a lithium-ion secondary battery.
【００１９】また、前記ＰＴＣ素子１３を組込んだ前記
二次電池において、過充電や誤使用による短絡に起因し
て異常電流が流れて電池内の温度が上昇すると、その熱
は前記外装缶１底部に密着して取付けられたＰＴＣ素子
１３に迅速に伝達される。また、前記異常電流は前記負
極端子側に接続された前記ＰＴＣ素子１３自体にも流れ
る。前記ＰＴＣ素子１３として例えば図２に示す正の温
度特性を有するものを用いた場合、前記外装缶１からの
熱伝達及びそれ自体の状態により８０℃を越える温度ま
で上昇されると、抵抗値が０．１Ω程度から急激に上昇
し、１２０℃前後の温度になると１０4 Ω程度まで高く
なる。その結果、前記異常電流は前記ＰＴＣ素子１３に
よって微小に制限され、電池が過度に発熱して爆発する
等の事故を未然に防止することができる。In the secondary battery incorporating the PTC element 13, when an abnormal current flows due to a short circuit due to overcharging or misuse and the temperature inside the battery rises, the heat is generated by the outer can 1. It is quickly transmitted to the PTC element 13 which is attached in close contact with the bottom. The abnormal current also flows through the PTC element 13 itself connected to the negative electrode terminal side. When the PTC element 13 having, for example, the positive temperature characteristic shown in FIG. 2 is used, the resistance value increases when the temperature exceeds 80 ° C. due to the heat transfer from the outer can 1 and the state of itself. It rapidly rises from about 0.1 Ω, and when it reaches a temperature around 120 ° C, it is 10 4 It becomes as high as Ω. As a result, the abnormal current is minutely limited by the PTC element 13, and it is possible to prevent accidents such as excessive heat generation and explosion of the battery.
【００２０】更に、前記ＰＴＣ素子１３を前記外装缶１
の底部に配置することによって、従来のようにＰＴＣ素
子を封口体に取付けることに伴なう封口手段の制約を回
避でき、前記封口体７を前記外装缶１の開口部にレーザ
ーシーム溶接により取付けることができる。その結果、
封口性の良好なリチウムイオン二次電池を得ることがで
きる。Further, the PTC element 13 is attached to the outer can 1.
By arranging the PTC element on the bottom of the package, the restriction of the sealing means associated with the conventional mounting of the PTC element to the sealing body can be avoided, and the sealing body 7 is mounted on the opening of the outer can 1 by laser seam welding. be able to. as a result,
A lithium ion secondary battery having a good sealing property can be obtained.
【００２１】更に、前記ＰＴＣ素子１３と前記外装被覆
樹脂チューブ１６との間に保護リング１５を介装するこ
とによって、電池の使用時における落下等による衝撃を
前記保護リング１５で吸収、緩和できるため、前記ＰＴ
Ｃ素子１３が破損されるのを防止できる。Further, by inserting the protective ring 15 between the PTC element 13 and the outer covering resin tube 16, the protective ring 15 can absorb and mitigate the impact caused by dropping the battery during use. , The PT
It is possible to prevent the C element 13 from being damaged.
【００２２】なお、前記実施例ではＰＴＣ素子の底面側
にその保護を目的として端子板を配置したが、例えばＰ
ＴＣ素子の構成部品である電極板を厚くすれば前記端子
板を省略することが可能である。In the above embodiment, the terminal plate is arranged on the bottom surface side of the PTC element for the purpose of protection.
If the electrode plate which is a component of the TC element is thickened, the terminal plate can be omitted.
【００２３】前記実施例では、外装被覆樹脂チューブを
用いて外装缶の底部外面に配置したＰＴＣ素子を保持す
る構成にしたが、前記チューブの代りに片面に接着剤が
付着された外装被覆樹脂ラベルを用い、このラベルを前
記外装缶外周にその上下両端が突出するように巻回し、
熱収縮させることによって実施例と同様な効果を達成す
ることができる。前記実施例では、円筒形リチウムイオ
ン二次電池に適用して説明したが、角形リチウムイオン
二次電池にも同様に適用することができる。In the above-mentioned embodiment, the outer cover resin tube is used to hold the PTC element arranged on the outer surface of the bottom of the outer can. However, instead of the tube, the outer cover resin label having an adhesive on one side is used. Using this label, the label is wound around the outer can so that both upper and lower ends thereof project.
The same effect as that of the embodiment can be achieved by heat shrinking. In the above-described embodiment, the description is applied to the cylindrical lithium ion secondary battery, but the invention can be applied to the prismatic lithium ion secondary battery as well.
【００２４】[0024]
【発明の効果】以上詳述したように、本発明によればＰ
ＴＣ素子の取り付け構造を簡素化することができ、かつ
封口性を向上することが可能で、安全性が高く、単電池
のみならず組電池としても有用なリチウムイオン二次電
池を提供できる。As described above in detail, according to the present invention, P
It is possible to provide a lithium-ion secondary battery that can simplify the TC element mounting structure, improve the sealing performance, and have high safety, and that is useful not only as a single battery but also as an assembled battery.
【図面の簡単な説明】[Brief description of drawings]
【図１】本実施例である円筒形リチウムイオン二次電池
の半裁図。FIG. 1 is a semi-cut view of a cylindrical lithium ion secondary battery according to an embodiment.
【図２】本実施例である円筒形リチウムイオン二次電池
におけるＰＴＣ素子の温度変化に対する抵抗値の変化を
示す特性図。FIG. 2 is a characteristic diagram showing a change in resistance value of the PTC element in the cylindrical lithium-ion secondary battery according to the present embodiment with respect to temperature change.
１…電池外装缶、２…積層電極体、７…封口体、１３…
ＰＴＣ素子、１５…保護リング、１６…外装被覆樹脂チ
ューブ。1 ... Battery outer can, 2 ... Laminated electrode body, 7 ... Sealing body, 13 ...
PTC element, 15 ... Protective ring, 16 ... Exterior coating resin tube.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 川辺 正道 神奈川県川崎市幸区堀川町72番地 株式会 社東芝堀川町工場内 (72)発明者 山下 正隆 神奈川県川崎市川崎区夜光１丁目３番１号 旭化成工業株式会社内 (72)発明者 笠原 茂雄 東京都品川区南品川３丁目４番10号 東芝 電池株式会社内 (72)発明者 高山 元 東京都品川区南品川３丁目４番10号 東芝 電池株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masamichi Kawabe, 72 Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Stock Company, Toshiba Horikawa-cho factory (72) Inventor Masataka Yamashita 1-3, Yokou, Kawasaki-ku, Kawasaki-shi, Kanagawa No. 1 Asahi Kasei Kogyo Co., Ltd. (72) Inventor Shigeo Kasahara 3-4-10 Minami-Shinagawa, Shinagawa-ku, Tokyo Inside Toshiba Battery Co. (72) Inventor Gen Takayama 3-4-10 Minami-Shinagawa, Shinagawa-ku, Tokyo Toshiba Battery Co., Ltd.
Claims (2)
缶を封口する封口体と、前記外装缶の底部に配置された
板状のＰＴＣ素子と、少なくとも前記外装缶及び前記Ｐ
ＴＣ素子の外周縁付近に亘って被覆された熱収縮性の外
装被覆樹脂チューブ又は外装被覆樹脂ラベルとを備える
ことを特徴とするリチウムイオン二次電池。1. An outer can containing a power generating element, a sealing body for sealing the outer can, a plate-shaped PTC element arranged at the bottom of the outer can, and at least the outer can and P.
A lithium-ion secondary battery comprising a heat-shrinkable outer covering resin tube or outer covering resin label which is covered around the outer peripheral edge of the TC element.
樹脂チューブ又は前記外装被覆樹脂ラベルとの間に保護
リングを介装することを特徴とする請求項１記載のリチ
ウムイオン二次電池。2. The lithium-ion secondary battery according to claim 1, wherein a protective ring is interposed between the outer peripheral edge of the PTC element and the outer covering resin tube or the outer covering resin label.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17088192A JP3233452B2 (en) | 1992-06-29 | 1992-06-29 | Lithium ion secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17088192A JP3233452B2 (en) | 1992-06-29 | 1992-06-29 | Lithium ion secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0613067A true JPH0613067A (en) | 1994-01-21 |
| JP3233452B2 JP3233452B2 (en) | 2001-11-26 |
Family
ID=15913046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17088192A Expired - Lifetime JP3233452B2 (en) | 1992-06-29 | 1992-06-29 | Lithium ion secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3233452B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0992260A (en) * | 1995-09-20 | 1997-04-04 | Nissan Motor Co Ltd | Battery |
| KR100291915B1 (en) * | 1998-04-09 | 2001-06-01 | 김순택 | Method for producing prismatic secondary cell |
| JP2004253146A (en) * | 2002-12-27 | 2004-09-09 | Matsushita Electric Ind Co Ltd | Electrochemical element |
| KR100449762B1 (en) * | 2002-09-05 | 2004-09-22 | 삼성에스디아이 주식회사 | Lithium secondary battery |
-
1992
- 1992-06-29 JP JP17088192A patent/JP3233452B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0992260A (en) * | 1995-09-20 | 1997-04-04 | Nissan Motor Co Ltd | Battery |
| KR100291915B1 (en) * | 1998-04-09 | 2001-06-01 | 김순택 | Method for producing prismatic secondary cell |
| KR100449762B1 (en) * | 2002-09-05 | 2004-09-22 | 삼성에스디아이 주식회사 | Lithium secondary battery |
| JP2004253146A (en) * | 2002-12-27 | 2004-09-09 | Matsushita Electric Ind Co Ltd | Electrochemical element |
| US7547489B2 (en) | 2002-12-27 | 2009-06-16 | Panasonic Corporation | Electrochemical device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3233452B2 (en) | 2001-11-26 |
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