JP2000260474A - Lithium secondary battery - Google Patents
Lithium secondary batteryInfo
- Publication number
- JP2000260474A JP2000260474A JP5876799A JP5876799A JP2000260474A JP 2000260474 A JP2000260474 A JP 2000260474A JP 5876799 A JP5876799 A JP 5876799A JP 5876799 A JP5876799 A JP 5876799A JP 2000260474 A JP2000260474 A JP 2000260474A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- secondary battery
- lithium
- lithium secondary
- negative electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
(57)【要約】
【課題】電力貯蔵用または電気自動車用の安全性の優れ
た２次電池の提供。
【解決手段】リチウムイオンが挿入脱離可能な正極およ
び負極、並びに、上記正負極を電気的に分離するセパレ
ータを有する充放電可能なリチウム２次電池であって、
渦状に倦回された電極集合体４を電池容器３内に支持す
る空洞の中心軸が、電池容器と開口部を一体に形成され
ていることを特徴とするリチウム２次電池。
(57) [Summary] [Problem] To provide a highly safe secondary battery for electric power storage or electric vehicles. A chargeable / dischargeable lithium secondary battery having a positive electrode and a negative electrode into which lithium ions can be inserted and desorbed, and a separator for electrically separating the positive electrode and the negative electrode,
A lithium secondary battery characterized in that a central axis of a cavity for supporting the spirally wound electrode assembly 4 in the battery container 3 is formed integrally with the battery container and the opening.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、非水電解液を用い
たリチウム２次電池に関する。The present invention relates to a lithium secondary battery using a non-aqueous electrolyte.
【０００２】[0002]
【従来の技術】近年では、環境面での要請から二酸化炭
素の削減、エネルギー消費の抑制などが強く求められて
いる。このために、電池を用いた電力貯蔵システムや電
気自動車などが新しい環境技術として注目されている。2. Description of the Related Art In recent years, there has been a strong demand for reduction of carbon dioxide and suppression of energy consumption due to environmental demands. For this reason, a power storage system using a battery, an electric vehicle, and the like have been attracting attention as new environmental technologies.
【０００３】こうした電池として非水電解液を用いたリ
チウム二次電池は、電池電圧が高く、高エネルギー密度
であるため、コンピュータや携帯用電話器等の情報機器
用として実用化が進んでいる。しかし、こうした産業用
途の電池システムでは、民生機器以上に安全性が重視さ
れる。A lithium secondary battery using a non-aqueous electrolyte as such a battery has a high battery voltage and a high energy density, and is therefore being put to practical use for information devices such as computers and portable telephones. However, in such a battery system for industrial use, safety is more important than consumer equipment.
【０００４】リチウムイオン電池では、過充電、短絡、
圧壊等により電池が発火、破裂を起こすと云う問題があ
る。これに対応するために、電池内部の圧力上昇時の安
全を図る手段（機構）が設けられ、発生ガス等を外部に
放出することで、電池の破裂を防ぐなどが試みられてい
る。これについては、特開平９−１９９１０４号公報が
知られている。In a lithium ion battery, overcharging, short circuit,
There is a problem that the battery is ignited or ruptured due to crushing or the like. In order to cope with this, a means (mechanism) for ensuring safety when the pressure inside the battery rises is provided, and attempts are being made to prevent the battery from being ruptured by discharging generated gas and the like to the outside. With respect to this, Japanese Patent Application Laid-Open No. Hei 9-199104 is known.
【０００５】[0005]
【発明が解決しようとする課題】リチウム２次電池は、
破裂、燃焼等の安全性に問題があり、安全弁等の従来の
安全手段では本質的な解決にはなっていない。SUMMARY OF THE INVENTION A lithium secondary battery is
There is a problem in safety such as rupture and combustion, and conventional safety measures such as a safety valve have not been an essential solution.
【０００６】本発明の目的は、従来の問題点を解決し、
より安全なリチウム２次電池を提供することにある。An object of the present invention is to solve the conventional problems,
It is to provide a safer lithium secondary battery.
【０００７】[0007]
【課題を解決するための手段】前記目的を達成する本発
明の要旨は次のとおりである。The gist of the present invention to achieve the above object is as follows.
【０００８】〔１〕 リチウムイオンが挿入脱離可能な
正極および負極、並びに、上記正極と負極とを電気的に
分離するセパレータを有する充放電可能なリチウム２次
電池であって、渦状に倦回された電極集合体を電池容器
内に支持する空洞の中心軸が、電池容器と開口部を一体
に形成されていることを特徴とするリチウム２次電池。[1] A chargeable / dischargeable lithium secondary battery having a positive electrode and a negative electrode into which lithium ions can be inserted and desorbed, and a separator for electrically separating the positive electrode and the negative electrode, wherein the rechargeable lithium battery has a spiral shape. A lithium secondary battery, wherein a center axis of a cavity for supporting the electrode assembly in a battery container is formed integrally with the battery container and an opening.
【０００９】〔２〕 前記空洞の中心軸が内部に冷媒を
循環できるよう構成されて前記のリチウム２次電池。[2] The lithium secondary battery described above, wherein a center axis of the cavity is configured to circulate a refrigerant therein.
【００１０】〔３〕 前記開口部が放熱手段を備えてい
る前記のリチウム２次電池。[3] The lithium secondary battery described above, wherein the opening is provided with a heat radiating means.
【００１１】〔４〕 前記正極を構成する材料がＣｏ，
Ｎｉ，Ｍｎの１種以上を含有し、前記負極を構成する材
料が非晶質炭素または黒鉛である前記のリチウム２次電
池。[4] The material constituting the positive electrode is Co,
The above-mentioned lithium secondary battery containing one or more of Ni and Mn, and a material constituting the negative electrode is amorphous carbon or graphite.
【００１２】〔５〕 前記正極を構成する材料が導電性
高分子，硫黄を含有する有機化合物、バナジウムを含有
する酸化物、または、ＴｉＳ2を含有し、負極を構成す
る材料がリチウム金属、または、リチウム合金であり、
電解質としてポリマ、または、ゲル電解質を用いた前記
のリチウム２次電池。[5] The material constituting the positive electrode contains a conductive polymer, an organic compound containing sulfur, an oxide containing vanadium, or a material containing TiS 2, and the material constituting the negative electrode is lithium metal or , Is a lithium alloy,
The above lithium secondary battery using a polymer or gel electrolyte as an electrolyte.
【００１３】[0013]
【発明の実施の形態】リチウム２次電池は、正極にはＬ
ｉと、Ｃｏ，Ｎｉ，Ｍｎ等の遷移金属との複合酸化物を
用い、負極には黒鉛や炭素等を用いたものである。ま
た、電解質としてはＬｉＰＦ6、ＬｉＢＦ4、ＬｉＣｌＯ
4を含む有機電解液を用い、該液中をリチウムイオンが
移動することにより充放電するものである。BEST MODE FOR CARRYING OUT THE INVENTION A lithium secondary battery has
A composite oxide of i and a transition metal such as Co, Ni, and Mn is used, and graphite, carbon, or the like is used for the negative electrode. As electrolytes, LiPF 6 , LiBF 4 , LiClO
It uses an organic electrolytic solution containing 4, and charges and discharges by moving lithium ions in the solution.
【００１４】従来の電池構造は、円筒状の電池密閉容器
の中央部に、電流取り出し用の正極端子が設置されてい
るのが一般的である。In a conventional battery structure, a positive electrode terminal for extracting current is generally provided at the center of a cylindrical battery sealed container.
【００１５】電極集合体は、正極、セパレータ、負極の
順に重ねてセンターピンと呼ばれるピンを軸として、巻
き付けることによって形成される。正極、および、負極
にはタブ状の引き出し部分が形成されており、これが取
り出し電極に取り出しリードで接続されている。安全性
を高めるためには、内部圧力の上昇による電池の破裂を
防ぐために、安全弁を設けるのが一般的である。The electrode assembly is formed by laminating a positive electrode, a separator, and a negative electrode in this order and winding around a pin called a center pin as an axis. A tab-shaped lead portion is formed on the positive electrode and the negative electrode, and this is connected to a lead electrode with a lead. In order to enhance safety, a safety valve is generally provided to prevent the battery from being ruptured due to an increase in internal pressure.
【００１６】上記に対し、本発明のリチウム２次電池で
は、電極集合体を冷却する手段を有することが特徴であ
る。センターピンに当る電極集合体の支持部が、密閉容
器と一体となった中空のもので、これが電池密閉容器を
貫通して外部に対して開口部を形成している。該開口部
を設置するために、正極および負極の電極取り出し端子
は、従来の電池のように中心軸状にあるのではなく、こ
れよりも外れた部位に設置される。On the other hand, the lithium secondary battery of the present invention is characterized in that it has means for cooling the electrode assembly. The supporting portion of the electrode assembly corresponding to the center pin is a hollow member integrally formed with the sealed container, and penetrates the battery sealed container to form an opening to the outside. In order to install the openings, the positive and negative electrode lead-out terminals are not located on the central axis as in the conventional battery, but are installed at positions deviated therefrom.
【００１７】また、開口部は必ずしも電池密閉容器の中
心部に位置する必要はなく、外部から冷却媒体を流すこ
とが可能であれば、どのような位置にあってもよい。こ
の開口部には、冷却媒体、例えば、冷却水、空気、不活
性ガス、液体窒素などを循環させて充放電時に発生する
熱を除去できる構造になっている。The opening does not necessarily need to be located at the center of the battery sealed container, and may be located at any position as long as the cooling medium can flow from the outside. The opening has a structure in which a cooling medium, for example, cooling water, air, an inert gas, liquid nitrogen, or the like is circulated to remove heat generated during charging and discharging.
【００１８】また、前記開口部には、フィラやヒートパ
イプなどの機械的な放熱手段を設置することもできる。
これら放熱手段を形成する材料は、銅やアルミなどの熱
伝導率の高いものが望ましい。Further, a mechanical heat radiating means such as a filler or a heat pipe may be provided in the opening.
It is desirable that a material having high thermal conductivity, such as copper or aluminum, be used as a material forming these heat radiating means.
【００１９】リチウム２次電池では、充放電時に発熱が
生じることが知られている。これによる温度上昇によっ
て電極からガス発生が起こったり、活物質が分解するこ
とにより急激な発熱が生じ、これが原因となって電池の
発火や破裂が起こる。It is known that lithium secondary batteries generate heat during charging and discharging. Due to this temperature rise, gas is generated from the electrodes, or the active material is decomposed, which causes rapid heat generation, which causes ignition or rupture of the battery.
【００２０】電池の温度分布は、電極集合体の中心部で
より高くなっており、本発明のように電極集合体中心部
を冷却することにより、電池の安全性を飛躍的に高める
ことができる。The temperature distribution of the battery is higher at the center of the electrode assembly. By cooling the center of the electrode assembly as in the present invention, the safety of the battery can be dramatically improved. .
【００２１】本発明の電池の作製方法は、次のとおりで
ある。ここでは、円筒型電池について記述するが、角形
電池であっても、同様に電池中心部に開口部を設けるこ
とで、同様に安全性を高めることができる。The method for producing the battery of the present invention is as follows. Here, a cylindrical battery will be described, but even a square battery can be similarly enhanced in safety by providing an opening in the center of the battery.
【００２２】まず、金属箔の集電体上に正極および負極
の活物質を、有機結着剤および導電剤と共に混合塗布す
る。正極活物質としては、スピネル型構造のＬｉ−Ｍｎ
−Ｏ酸化物、例えば、Ｌｉ／Ｍｎ比が０.５２より高い
ものや、ＬｉＣｏＯ2、ＬｉＮｉＯ2やこれらの置換材量
を用いるのが望ましく、また、負極活物質としては、非
晶質炭素および黒鉛との混合物を用いるのが望ましい。First, a positive electrode and a negative electrode active material are mixed and applied onto a metal foil current collector together with an organic binder and a conductive agent. As the positive electrode active material, Li-Mn having a spinel structure is used.
-O oxides, for example, those having a Li / Mn ratio higher than 0.52, LiCoO 2 , LiNiO 2, and the amount of a substitute thereof are desirably used. As the negative electrode active material, amorphous carbon and It is desirable to use a mixture with graphite.
【００２３】電解質として、ポリエチレンオキシドやＰ
(ＰＯ6)ＬｉＣＦ3ＳＯ3のようなゲル電解質を用いる場
合には、正極としてＴｉＳ2や硫黄を含む有機化合物を
用いることもできる。As the electrolyte, polyethylene oxide or P
When a gel electrolyte such as (PO 6 ) LiCF 3 SO 3 is used, an organic compound containing TiS 2 or sulfur can be used as the positive electrode.
【００２４】これに導電材および結着剤を混合し、圧
延、乾燥した後に、中空管を支持体のセンターピンとし
て、電極集合体を倦回する。上記中空管は、必ずしも円
筒状のものである必要はなく、電池形状に応じて断面が
楕円形、あるいは、角形のものを用いることもできる。After the conductive material and the binder are mixed, rolled and dried, the electrode assembly is wound around using the hollow tube as the center pin of the support. The hollow tube does not necessarily have to be cylindrical, and may have an elliptical or square cross section depending on the shape of the battery.
【００２５】電極集合体は、正極、微細孔を有するセパ
レータ材料、および、負極をこの順に重ねてセンターピ
ンの周囲に巻き付けて形成する。The electrode assembly is formed by laminating a positive electrode, a separator material having micropores, and a negative electrode in this order and winding them around the center pin.
【００２６】電池密閉容器の上部および底部のほぼ中心
に、予め、前記中空のセンターピンを取り付けることが
できる穴が設けておき、ここに電極集合体を取り付け
て、センターピンと電池密閉容器の上部および底部を溶
接し電池容器を形成する。At the approximate center of the top and bottom of the battery container, a hole is provided in advance to which the hollow center pin can be attached, and the electrode assembly is attached thereto, and the center pin and the top and bottom of the battery container are attached. The bottom is welded to form a battery container.
【００２７】この後、上記密閉容器中に電解液を注入す
ることにより２次電池を完成する。また、固体電解質を
用いる場合には、セパレータに固体電解質を塗布、また
は、重合させて同時に巻き込むようにすることで、後か
ら電解液を注入しない方法もある。Thereafter, the secondary battery is completed by injecting the electrolyte into the closed container. When a solid electrolyte is used, there is a method in which a solid electrolyte is applied to a separator or polymerized so as to be rolled in at the same time, so that an electrolyte is not injected later.
【００２８】電池容器の中心部に開口部を形成し電池中
心部を冷却する冷却手段を設けることにより、電池内部
の発熱を緩和し発火、破裂等を防止する。また、開口部
に冷却媒体を流通して冷却することで、電池内部の発熱
をより緩和し発火、破裂等の防止を更に向上することが
できる。次に、本発明を実施例に基づき具体的に説明す
る。By providing an opening in the center of the battery container and providing a cooling means for cooling the center of the battery, heat generation inside the battery is reduced and ignition, rupture and the like are prevented. In addition, by circulating a cooling medium through the opening to cool the battery, heat generation inside the battery can be further alleviated, and prevention of ignition, rupture, and the like can be further improved. Next, the present invention will be specifically described based on examples.
【００２９】〔実施例 １〕本発明の円筒型電池の模式
断面構造を図１に示す。放熱手段としてヒートパイプ１
が、電池容器のほぼ中心のセンターピン２に挿入されて
いる。電池容器３と中空部２は溶接によって密閉を保つ
ようになっている。Example 1 FIG. 1 shows a schematic sectional structure of a cylindrical battery according to the present invention. Heat pipe 1 as heat dissipation means
Is inserted into the center pin 2 at the substantially center of the battery container. The battery container 3 and the hollow portion 2 are kept sealed by welding.
【００３０】電極集合体４は、電極リード５によって正
極端子６、および、負極端子７に接続されている。電極
集合体４で、発生した熱はヒートパイプ１から外部に放
出され、電極の発熱が抑制される。The electrode assembly 4 is connected to a positive terminal 6 and a negative terminal 7 by electrode leads 5. The heat generated in the electrode assembly 4 is released from the heat pipe 1 to the outside, and the heat generation of the electrodes is suppressed.
【００３１】〔比較例 １〕従来の電池構造における冷
却システムの一例と本発明の冷却システムの一例との比
較を図２に示す。Comparative Example 1 FIG. 2 shows a comparison between an example of a cooling system in a conventional battery structure and an example of the cooling system of the present invention.
【００３２】従来構造の電池（図２−ａ）では、その冷
却は電池外部からのみであり、冷却ファン１５等によっ
て電池容器３を空冷するのみであった。従って、冷却効
率はあまり良好とは云えなかった。In the battery of the conventional structure (FIG. 2A), cooling is performed only from the outside of the battery, and only the battery container 3 is air-cooled by the cooling fan 15 or the like. Therefore, the cooling efficiency was not so good.
【００３３】これに比べ、本発明の電池（図２−ｂ）で
は、最も温度上昇の大きい中心部を中空部２内に設けた
ヒートパイプ１を循環する冷媒を介して直接冷却するた
めに冷却効率が高く、電池の安全性向上に大きな効果が
ある。また、ヒートパイプ１内の冷媒は循環ポンプ１７
により冷却パイプ１６を循環させることで、より一層冷
却効率を高めることができる。なお、図示していない
が、冷媒は循環ライン内に設けた熱交換器等により冷却
する。On the other hand, in the battery of the present invention (FIG. 2B), cooling is performed because the central portion where the temperature rise is greatest is directly cooled through the refrigerant circulating through the heat pipe 1 provided in the hollow portion 2. It has high efficiency and has a great effect on improving battery safety. The refrigerant in the heat pipe 1 is supplied to the circulation pump 17.
By circulating the cooling pipe 16, the cooling efficiency can be further increased. Although not shown, the refrigerant is cooled by a heat exchanger or the like provided in the circulation line.
【００３４】〔実施例 ２〕本発明による電池を製法を
図３の模式図により説明する。まず、底部蓋１３が予め
溶接された中空管をセンターピン２として、正極９、多
孔質樹脂からなるセパレータ１０、負極１１を重ねて倦
回し、電極集合体４を形成する（図３−ａ）。Example 2 A method for manufacturing a battery according to the present invention will be described with reference to the schematic diagram of FIG. First, the positive electrode 9, the separator 10 made of a porous resin, and the negative electrode 11 are stacked and wound around the hollow tube to which the bottom lid 13 is welded in advance as the center pin 2 to form the electrode assembly 4 (FIG. 3-a). ).
【００３５】次に、と上部蓋１２と底部蓋１３に設けら
れた電極端子６、７に電極リード５を接続する（図３−
ｂ）。Next, the electrode leads 5 are connected to the electrode terminals 6 and 7 provided on the upper lid 12 and the lower lid 13 (FIG. 3).
b).
【００３６】上部蓋１２，底部蓋１３，電池容器３、中
空センターピン２をそれぞれ溶接して電池容器を密閉す
る（図３−ｃ）。次いで、予め設けた注液孔１４から電
解液を注入し密栓することにより電池を作成することが
できる。この電池の中空センターピン２内に、ヒートパ
イプ１を挿通して本発明の電池が完成される。The upper lid 12, the bottom lid 13, the battery case 3, and the hollow center pin 2 are welded to seal the battery case (FIG. 3C). Next, a battery can be prepared by injecting an electrolytic solution through the injection hole 14 provided in advance and sealing the electrolyte. The heat pipe 1 is inserted into the hollow center pin 2 of the battery to complete the battery of the present invention.
【００３７】〔実施例 ３〕実施例１，２では、円筒型
電池を例示したが、角形電池においても中空構造を有す
る電池とすることで、実施例１，２と同様の効果を得る
ことができる。角形電池の概略図を図４に示す。Embodiment 3 In Embodiments 1 and 2, a cylindrical battery is exemplified, but the same effect as in Embodiments 1 and 2 can be obtained by using a hollow battery as a prismatic battery. it can. FIG. 4 is a schematic diagram of a prismatic battery.
【００３８】電池容器３に設けた中空のセンターピン２
を介してヒートパイプ（図示省略）を挿通し、電池内部
を冷却するように構成されている。The hollow center pin 2 provided in the battery case 3
Through a heat pipe (not shown) to cool the inside of the battery.
【００３９】次に、前記実施例で示す本発明の冷却手段
を有する電池の半径方向の温度分布を、従来電池と比較
し図５に示す。Next, the temperature distribution in the radial direction of the battery having the cooling means of the present invention shown in the above embodiment is shown in FIG. 5 in comparison with the conventional battery.
【００４０】雰囲気温度を５０℃とし、１０Ｃのレート
で急速パルス充放電を繰り返した場合の電池内部温度の
半径方向の分布を計測した。The distribution of the battery internal temperature in the radial direction when the rapid pulse charge / discharge was repeated at a rate of 10 C at an ambient temperature of 50 ° C. was measured.
【００４１】中心部に水を強制循環させて冷却した本発
明の電池では、その温度上昇は１５℃以下であった。こ
れに比べて、従来型の電池の中心部の温度は周辺温度よ
り約３５℃上昇していた。The temperature of the battery of the present invention cooled by forcibly circulating water in the center was 15 ° C. or less. In comparison, the temperature at the center of the conventional battery was about 35 ° C. higher than the surrounding temperature.
【００４２】[0042]
【発明の効果】本発明により充放電時の電池内部の温度
上昇が抑制され、安全性の高い２次電池を提供すること
ができる。According to the present invention, it is possible to provide a highly safe secondary battery in which a rise in temperature inside the battery during charging and discharging is suppressed.
【図１】本発明の円筒型電池の模式断面図である。FIG. 1 is a schematic sectional view of a cylindrical battery of the present invention.
【図２】本発明および従来の２次電池冷却システムの比
較説明図である。FIG. 2 is a comparative explanatory diagram of the present invention and a conventional secondary battery cooling system.
【図３】本発明の２次電池の製法を示す模式図である。FIG. 3 is a schematic view illustrating a method for manufacturing a secondary battery of the present invention.
【図４】本発明の角形電池の模式構成図である。FIG. 4 is a schematic structural view of a prismatic battery of the present invention.
【図５】本発明および従来の２次電池のパルス充放電時
の温度分布を示すグラフである。FIG. 5 is a graph showing a temperature distribution during pulse charging and discharging of the secondary battery of the present invention and the conventional battery.
１…ヒートパイプ、２…センターピン、３…電池容器、
４…電極集合体、５…電極リード、６…正極端子、７…
負極端子、９…正極、１０…セパレータ、１１…負極、
１２…上部蓋、１３…底部蓋、１４…電解液注液孔、１
５…冷却ファン、１６…冷却パイプ、１７…循環ポン
プ。1: heat pipe, 2: center pin, 3: battery container,
4 ... electrode assembly, 5 ... electrode lead, 6 ... positive electrode terminal, 7 ...
Negative electrode terminal, 9 positive electrode, 10 separator, 11 negative electrode,
12 ... top cover, 13 ... bottom cover, 14 ... electrolyte injection hole, 1
5: cooling fan, 16: cooling pipe, 17: circulation pump.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 永沼 義男 茨城県日立市大みか町七丁目１番１号 株 式会社日立製作所日立研究所内 Ｆターム(参考） 5H003 AA04 AA10 BB01 BB02 BB04 BB05 BB06 BB12 BB32 5H022 AA09 AA18 BB06 KK00 KK03 5H028 AA01 AA06 BB08 CC08 CC12 EE01 EE04 EE05 EE06 FF09 5H029 AJ12 AK02 AK03 AK05 AK15 AK16 AL06 AL07 AL12 AM00 AM07 AM16 BJ00 BJ02 BJ14 BJ22 CJ07 DJ04 5H031 AA02 AA08 CC01 CC05 EE01 EE02 EE03 EE04 KK01 KK06 KK08 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshio Naganuma 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture F-term in Hitachi Research Laboratory, Hitachi Ltd. 5H003 AA04 AA10 BB01 BB02 BB04 BB05 BB06 BB12 BB32 5H022 AA09 AA18 BB06 KK00 KK03 5H028 AA01 AA06 BB08 CC08 CC12 EE01 EE04 EE05 EE06 FF09 5H029 AJ12 AK02 AK03 AK05 AK15 AK16 AL06 AL07 AL12 AM00 AM07 AM16 BJ00 BJ02 BJ04 AJ05 EA01 KK
Claims (5)
よび負極、並びに、上記正極と負極とを電気的に分離す
るセパレータを有する充放電可能なリチウム２次電池で
あって、渦状に倦回された電極集合体を電池容器内に支
持する空洞の中心軸が、電池容器と開口部を一体に形成
されていることを特徴とするリチウム２次電池。1. A chargeable / dischargeable lithium secondary battery having a positive electrode and a negative electrode into which lithium ions can be inserted and desorbed, and a separator for electrically separating the positive electrode and the negative electrode, wherein the rechargeable lithium battery is spirally wound. A center axis of a cavity for supporting the electrode assembly in the battery container, the battery container and the opening being integrally formed.
きるよう構成されている請求項１に記載のリチウム２次
電池。2. The lithium secondary battery according to claim 1, wherein a center axis of the cavity is configured to circulate a refrigerant therein.
項１に記載のリチウム２次電池。3. The lithium secondary battery according to claim 1, wherein the opening has a heat radiating means.
Ｍｎの１種以上を含有し、前記負極を構成する材料が非
晶質炭素または黒鉛である請求項１に記載のリチウム２
次電池。4. The material constituting the positive electrode is Co, Ni,
The lithium 2 according to claim 1, which contains at least one kind of Mn, and a material constituting the negative electrode is amorphous carbon or graphite.
Next battery.
子，硫黄を含有する有機化合物、バナジウムを含有する
酸化物、または、ＴｉＳ2を含有し、負極を構成する材
料がリチウム金属、または、リチウム合金であり、電解
質としてポリマ、または、ゲル電解質を用いた請求項１
に記載のリチウム２次電池。5. The material forming the positive electrode contains a conductive polymer, an organic compound containing sulfur, an oxide containing vanadium, or TiS 2, and the material forming the negative electrode is lithium metal or 2. A lithium alloy, wherein a polymer or a gel electrolyte is used as an electrolyte.
3. The lithium secondary battery according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5876799A JP2000260474A (en) | 1999-03-05 | 1999-03-05 | Lithium secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5876799A JP2000260474A (en) | 1999-03-05 | 1999-03-05 | Lithium secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000260474A true JP2000260474A (en) | 2000-09-22 |
Family
ID=13093711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5876799A Pending JP2000260474A (en) | 1999-03-05 | 1999-03-05 | Lithium secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000260474A (en) |
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