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JPH0547369A - Nonaqueous electrolyte battery - Google Patents

Nonaqueous electrolyte battery

Info

Publication number
JPH0547369A
JPH0547369A JP20816791A JP20816791A JPH0547369A JP H0547369 A JPH0547369 A JP H0547369A JP 20816791 A JP20816791 A JP 20816791A JP 20816791 A JP20816791 A JP 20816791A JP H0547369 A JPH0547369 A JP H0547369A
Authority
JP
Japan
Prior art keywords
positive electrode
battery
lead
potential
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.)
Granted
Application number
JP20816791A
Other languages
Japanese (ja)
Other versions
JP3258678B2 (en
Inventor
Ikurou Nakane
育朗 中根
Sanehiro Furukawa
修弘 古川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP20816791A priority Critical patent/JP3258678B2/en
Publication of JPH0547369A publication Critical patent/JPH0547369A/en
Application granted granted Critical
Publication of JP3258678B2 publication Critical patent/JP3258678B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • Y02E60/12

Landscapes

  • Primary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

PURPOSE:To provide a battery with high safety cutting off a lead and suppressing an overdischarge when the positive electrode potential is reduced to the reaction potential by forming the positive electrode lead with an electron conducting material reacted with a negative electrode active material at the potential in the final stage of an electric discharge or below. CONSTITUTION:A spring 2 is welded to a positive electrode cap 1, an aluminum plate 3 is welded to the spring 2, and the plate 3 is welded to a positive electrode current collector 4. When the positive electrode potential is reduced by an overdischarge to the reaction potential between aluminum forming a lead and lithium serving as a negative electrode active material in a battery with the positive electrode lead, aluminum is reacted with lithium and powdered, and the positive electrode lead is cut off. A positive electrode is insulated from a positive electrode terminal, and a further overdischarge is suppressed. The decomposition of an electrolyte on the surface of the positive electrode is suppressed, the leak and rupture of the battery can be prevented, and the battery with high safety is obtained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、正極と負極と電解液と
を備えた発電要素と、発電要素を収納せる一極性端子兼
用外装缶と、外装缶或るいは端子部材と電極との間の電
気的接続のためのリ−ドとを備えた非水電解液電池に係
り、特に正極リ−ドの改良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generating element having a positive electrode, a negative electrode, and an electrolytic solution, an outer can that also serves as a unipolar terminal for accommodating the power generating element, or an outer can or a terminal member and an electrode. The present invention relates to a non-aqueous electrolyte battery provided with a lead for electrical connection, and particularly to improvement of a positive electrode lead.

【0002】[0002]

【従来の技術】電池が短絡や逆接続等により過放電状態
にされ、電池電圧が0V以下の状態になった場合、正極
上で電解液の分解が生じ、電池内部の内圧が増加して電
池が破裂したり、正極上にリチウムが電析し、急激に反
応が進み、電池の発熱や、発火等を引き起こす可能性が
ある。
2. Description of the Related Art When a battery is over-discharged due to a short circuit or reverse connection and the battery voltage becomes 0 V or less, the electrolytic solution is decomposed on the positive electrode and the internal pressure inside the battery increases to May explode or lithium may be electrodeposited on the positive electrode, and the reaction may proceed rapidly, causing heat generation or ignition of the battery.

【0003】[0003]

【発明が解決しようとする課題】本発明は、電池が過放
電状態になった場合、自動的に電池内の回路を切断し、
過放電が進み、電池が発熱や破裂するのを防止すること
を目的とする。
SUMMARY OF THE INVENTION According to the present invention, when a battery is over-discharged, the circuit in the battery is automatically cut off,
The purpose is to prevent the battery from generating heat and exploding due to over-discharge.

【0004】[0004]

【課題を解決するための手段】正極と負極と電解液とを
備えた発電要素と、発電要素を収納せる一極性端子兼用
外装缶と、外装缶或るいは端子部材と電極との間の電気
的接続のためのリ−ドとを備えた非水電解液電池におい
て、正極リ−ドのすべて或るいは一部を、正極の放電末
期の電位以下で負極活物質と反応する電子導電性材料で
構成する。
Means for Solving the Problems A power generating element provided with a positive electrode, a negative electrode, and an electrolytic solution, an outer can that also serves as a unipolar terminal for housing the power generating element, and an electric power between the outer can or a terminal member and an electrode. In a non-aqueous electrolyte battery provided with a lead for electrical connection, an electronically conductive material that reacts all or part of the positive electrode lead with the negative electrode active material at a potential equal to or lower than the potential at the end of discharge of the positive electrode. It consists of.

【0005】正極リ−ドを構成する電子導電性材料とし
てはマグネシウム、亜鉛、銀、カドミウム、アルミニウ
ム、ガリウム、インジウム、珪素、ゲルマニウム、錫、
鉛、ビスマス、炭素より選ばれた単体、混合物、合金、
或るいはこれらの単体、混合物、合金に、上記以外の金
属を添加した材料を用いることができる。
As the electron conductive material forming the positive electrode lead, magnesium, zinc, silver, cadmium, aluminum, gallium, indium, silicon, germanium, tin,
Simple substance, mixture, alloy selected from lead, bismuth and carbon,
Alternatively, a material in which a metal other than the above is added to these simple substances, mixtures, and alloys can be used.

【0006】[0006]

【作用】従来、正極リ−ドの材料として、ニッケルやス
テンレスが用いられていたが、電池が過放電状態になっ
た場合でも、更に放電が進行し、電池の発熱や破裂を引
き起こしていた。
In the past, nickel or stainless steel was used as the material for the positive electrode lead, but even when the battery was over-discharged, the discharge further proceeded, causing heat generation and rupture of the battery.

【0007】そこで、正極リ−ドのすべて或るいは一部
を、正極の放電末期の電位以下で負極活物質と反応する
電子導電性材料で構成すれば、過放電等により正極の電
位が、正極リ−ドを構成する電子導電性材料と負極活物
質との反応電位まで低下すれば、この時点で負極活物質
と正極リ−ドが反応して金属間化合物が生成し、正極リ
−ドが粉末化して強度が低下し、正極リ−ドが正極から
切断される。そのため、電池の正極と正極端子とが絶縁
され、それ以上の放電状態が進まず、過放電が抑制され
る。従って、過放電による正極上での電解液の分解や、
正極表面上へのリチウム等の負極活物質の電析等が生じ
ないため、電池の異常な発熱や破裂、発火等を事前に防
止することができ、安全性の高い非水電解液電池が得ら
れるものである。
Therefore, if all or part of the positive electrode lead is made of an electronically conductive material that reacts with the negative electrode active material at a potential equal to or lower than the potential at the end of discharge of the positive electrode, the potential of the positive electrode becomes If the reaction potential between the electronically conductive material forming the positive electrode lead and the negative electrode active material is lowered, the negative electrode active material and the positive electrode lead react at this point to form an intermetallic compound, and the positive electrode lead is produced. Are pulverized to reduce the strength, and the positive electrode lead is cut from the positive electrode. Therefore, the positive electrode and the positive electrode terminal of the battery are insulated, the further discharged state does not proceed, and over-discharge is suppressed. Therefore, the decomposition of the electrolyte solution on the positive electrode due to over discharge,
Since the deposition of negative electrode active material such as lithium on the surface of the positive electrode does not occur, it is possible to prevent abnormal heat generation, rupture, or ignition of the battery in advance, and obtain a highly safe non-aqueous electrolyte battery. It is what is done.

【0008】[0008]

【実施例】以下に、本発明の実施例につき詳述する。EXAMPLES Examples of the present invention will be described in detail below.

【0009】図1に、本発明の一実施例である、正極リ
−ドの構造図を示す。
FIG. 1 is a structural diagram of a positive electrode lead which is an embodiment of the present invention.

【0010】1は正極キャップであり、ここにバネ2が
スポット溶接されており、このバネ2に厚み0.05m
mのアルミニウム板3がスポット溶接され、更にこのア
ルミニウム板3は、正極集電板4にスポット溶接されて
いる。又、アルミニウム板3には、電解液と常に接触す
るように、保液性のあるポリプロピレン製の不織布5が
配置されている。
Reference numeral 1 denotes a positive electrode cap, on which a spring 2 is spot-welded, and the spring 2 has a thickness of 0.05 m.
m aluminum plate 3 is spot-welded, and this aluminum plate 3 is spot-welded to the positive electrode current collector plate 4. A non-woven fabric 5 made of polypropylene having a liquid retaining property is arranged on the aluminum plate 3 so as to be constantly in contact with the electrolytic solution.

【0011】図2に、上記正極リ−ドを用いた円筒型電
池の断面図を示す。
FIG. 2 shows a sectional view of a cylindrical battery using the positive electrode lead.

【0012】ここで6は正極であって、活物質としての
マンガン酸化物に、導電剤としてのアセチレンブラック
と、結着剤としてのフッ素樹脂とを、80:10:10
(重量比)の割合で混合した合剤を正極集電板4に塗着
したものであり、本発明の要旨とする正極リ−ド7に接
合されている。8はリチウムよりなる負極であり、ポリ
プロピレン製の微多孔膜セパレ−タ9により正極6と隔
離され、渦巻状に巻取られ、負極缶10に挿入されてい
る。又、セパレ−タにはプロピレンカ−ボネ−トと1,
2−ジメトキシエタンとの等体積混合溶媒に過塩素酸リ
チウムを1モル/l溶解した非水電解液が含浸されてい
る。11は負極リ−ドである。電池寸法は直径14.2
mm、高さ50.0mmとした。これを本発明電池とし
た。
Reference numeral 6 denotes a positive electrode, in which manganese oxide as an active material, acetylene black as a conductive agent, and fluororesin as a binder are mixed at 80:10:10.
The mixture mixed in the ratio (weight ratio) is applied to the positive electrode current collector plate 4 and is joined to the positive electrode lead 7 which is the gist of the present invention. Reference numeral 8 denotes a negative electrode made of lithium, which is separated from the positive electrode 6 by a polypropylene microporous membrane separator 9, wound in a spiral shape, and inserted in a negative electrode can 10. Further, the separator has propylene carbonate and 1,
A non-aqueous electrolytic solution in which 1 mol / l of lithium perchlorate is dissolved in an equal volume mixed solvent of 2-dimethoxyethane is impregnated. Reference numeral 11 is a negative electrode lead. Battery size is 14.2 diameter
mm and height 50.0 mm. This was used as the battery of the present invention.

【0013】又、正極リ−ドにステンレス板を用いる以
外は本発明と同様の電池を作製し、これを比較電池とし
た。
A battery similar to that of the present invention was prepared except that a stainless steel plate was used for the positive electrode lead, and this battery was used as a comparative battery.

【0014】これらの電池を各100個ずつ用いて、そ
れぞれ以下の条件で過放電試験を行った。
An over-discharge test was conducted under the following conditions using 100 of each of these batteries.

【0015】過放電条件 (1) 1A 定電流 10時間放電 (2) 10A 定電流 1時間放電 (3) −6V 定電圧 50時間保持 (4) −24V 定電圧 10時間保持 各条件で過放電試験を行った結果、漏液、破裂が生じた
電池の個数を表1〜表4にそれぞれ示す。
Overdischarge conditions (1) 1A constant current 10 hours discharge (2) 10A constant current 1 hour discharge (3) -6V constant voltage 50 hours hold (4) -24V constant voltage 10 hours hold Over discharge test under each condition Table 1 to Table 4 show the numbers of batteries in which liquid leakage and rupture occurred as a result.

【0016】又、図3には本発明電池の初期状態Aと、
過放電を行い、正極リ−ドが切断された、絶縁状態Bの
断面図を示す。
Further, FIG. 3 shows an initial state A of the battery of the present invention,
FIG. 6 is a cross-sectional view of an insulating state B in which the positive electrode lead is cut by overdischarging.

【0017】[0017]

【表1】 [Table 1]

【0018】[0018]

【表2】 [Table 2]

【0019】[0019]

【表3】 [Table 3]

【0020】[0020]

【表4】 [Table 4]

【0021】表1〜表4より明白なるように、本発明電
池では電池が過放電状態になったときの漏液、破裂が生
じないことが分かる。この理由は、図3に示したよう
に、本発明電池では過放電により、正極リ−ドを構成す
るアルミニウムと負極活物質であるリチウムとの反応電
位、即ち約0.4V(vsLi/Li+)まで正極の電位が
低下すると、アルミニウムが負極活物質であるリチウム
と反応して粉末化し、図3のBに示す如く、正極リ−ド
が切断されるため、電池内に電流が流れなくなり、それ
以上の過放電が進まない。よって、正極表面上での電解
液の分解等が抑制できるため、電池の漏液や破裂などが
防止でき、極めて安全性の高い電池を作製することがで
きる。
As is clear from Tables 1 to 4, it is understood that the battery of the present invention does not cause liquid leakage or rupture when the battery is in an overdischarged state. The reason for this is that, as shown in FIG. 3, in the battery of the present invention, the reaction potential between aluminum that constitutes the positive electrode lead and lithium that is the negative electrode active material is about 0.4 V (vsLi / Li +) due to overdischarge. When the potential of the positive electrode decreases to (), aluminum reacts with lithium, which is the negative electrode active material, to be powdered, and the positive electrode lead is disconnected as shown in FIG. 3B, so that no current flows in the battery, Further over-discharge does not proceed. Therefore, the decomposition of the electrolytic solution on the surface of the positive electrode can be suppressed, so that the leakage or the rupture of the battery can be prevented, and the battery having extremely high safety can be manufactured.

【0022】尚、本実施例において正極リ−ドを構成す
る電子導電性材料として、アルミニウムを例示したが、
この他の材料でも同様な効果が得られ、種々正極リ−ド
を構成する電子導電性材料は、表5に示す反応電位で、
負極活物質であるリチウムとそれぞれ反応し、正極から
切断される。
In this embodiment, aluminum is exemplified as the electron conductive material forming the positive electrode lead.
Similar effects can be obtained with other materials, and the electronically conductive materials forming various positive electrode leads have the reaction potentials shown in Table 5,
It reacts with lithium, which is the negative electrode active material, and is cut from the positive electrode.

【0023】[0023]

【表5】 [Table 5]

【0024】又、本実施例では、過放電時に正極板と正
極リ−ドを確実に電気絶縁するために、正極リ−ドの一
部にバネを設けているが、この形状は本実施例に例示し
た構成以外でもよく、更にこのようなバネのない構成で
も本発明は有効である。
Further, in this embodiment, a spring is provided in a part of the positive electrode lead in order to surely electrically insulate the positive electrode plate and the positive electrode lead in the case of over-discharging. The present invention is effective even in a structure other than the structure illustrated in FIG.

【0025】又、図面に付した同一番号は、同一若しく
は相当するものを示すものとする。
Further, the same numbers attached to the drawings indicate the same or corresponding ones.

【0026】[0026]

【発明の効果】正極と負極と電解液とを備えた発電要素
と、発電要素を収納せる一極性端子兼用外装缶と、外装
缶或るいは端子部材と電極との間の電気的接続のための
リ−ドとを備えた非水電解液電池において、正極リ−ド
を正極の放電末期の電位以下で負極活物質と反応する電
子導電性材料で構成すれば、過放電により電池電圧が低
下した時に、正極リ−ドと負極活物質とが反応して、正
極リ−ドがもろくなり、自動的に電池内の回路を切断す
るものであり、過放電による電池の発熱や破裂を防止
し、安全性の高い電池が得られる。
EFFECTS OF THE INVENTION For the purpose of electrical connection between a power generating element having a positive electrode, a negative electrode and an electrolytic solution, an outer can also serving as a unipolar terminal for accommodating the power generating element, and an outer can or a terminal member and an electrode. In the non-aqueous electrolyte battery including the lead of (1), if the positive electrode lead is composed of an electronically conductive material that reacts with the negative electrode active material at a potential equal to or lower than the potential at the end of discharge of the positive electrode, the battery voltage decreases due to overdischarge. When this occurs, the positive electrode lead reacts with the negative electrode active material, the positive electrode lead becomes brittle, and the circuit inside the battery is automatically disconnected, preventing the battery from generating heat or exploding due to over discharge. , A highly safe battery can be obtained.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明電池の正極リ−ドを示す。FIG. 1 shows a positive electrode lead of the battery of the present invention.

【図2】本発明電池の縦断面図を示す。FIG. 2 shows a vertical sectional view of a battery of the present invention.

【図3】本発明電池の未過放電状態Aと過放電状態Bの
縦断面図を示す。
FIG. 3 is a vertical cross-sectional view of an unover-discharged state A and an over-discharged state B of the battery of the present invention.

【符号の説明】[Explanation of symbols]

1 正極キャップ 2 バネ 3 アルミニウム板 4 正極集電板 5 保液材 6 正極 7 正極リ−ド 8 負極 9 セパレ−タ 10 負極缶 11 負極リ−ド DESCRIPTION OF SYMBOLS 1 Positive electrode cap 2 Spring 3 Aluminum plate 4 Positive electrode current collector plate 5 Liquid retaining material 6 Positive electrode 7 Positive electrode lead 8 Negative electrode 9 Separator 10 Negative electrode can 11 Negative electrode lead

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 過放電により電池電圧が低下した時に、
自動的に電池内の回路を切断する機能を備えた非水電解
液電池であって、正極と負極と電解液とを備えた発電要
素と、前記発電要素を収納せる一極性端子兼用外装缶
と、前記外装缶或るいは端子部材と電極との間の電気的
接続のためのリ−ドとを備えた電池において、正極リ−
ドのすべて或るいは一部が、正極の放電末期の電位以下
で負極活物質と反応する電子導電性材料で構成されるこ
とを特徴とする非水電解液電池。
1. When the battery voltage drops due to over-discharge,
A non-aqueous electrolyte battery having a function of automatically disconnecting a circuit in the battery, including a power-generating element having a positive electrode, a negative electrode, and an electrolytic solution, and an outer can that also serves as a unipolar terminal for housing the power-generating element. In the battery provided with the outer can or the lead for electrical connection between the terminal member and the electrode, a positive electrode lead
A non-aqueous electrolyte battery, characterized in that all or part of the cathode is made of an electronically conductive material that reacts with the negative electrode active material at a potential equal to or lower than the potential at the end of discharge of the positive electrode.
【請求項2】 前記正極リ−ドを構成する電子導電性材
料が、マグネシウム、亜鉛、銀、カドミウム、アルミニ
ウム、ガリウム、インジウム、珪素、ゲルマニウム、
錫、鉛、ビスマス、炭素より選ばれた単体、混合物、合
金、或るいはこれらの単体、混合物、合金に、上記以外
の金属を添加したものからなることを特徴とする請求項
1記載の非水電解液電池。
2. The electronically conductive material constituting the positive electrode lead is magnesium, zinc, silver, cadmium, aluminum, gallium, indium, silicon, germanium,
2. A simple substance, a mixture, an alloy selected from tin, lead, bismuth, and carbon, or a substance, a mixture, or an alloy of any of these, to which a metal other than the above is added. Water electrolyte battery.
【請求項3】 前記負極が、リチウム、リチウム合金、
或るいはリチウムを吸蔵放出可能な炭素材料、金属酸化
物、金属硫化物、金属カルコゲナイドからなることを特
徴とする請求項1記載の非水電解液電池。
3. The negative electrode is lithium, a lithium alloy,
The non-aqueous electrolyte battery according to claim 1, comprising a carbon material capable of inserting and extracting lithium, a metal oxide, a metal sulfide, and a metal chalcogenide.
JP20816791A 1991-08-20 1991-08-20 Non-aqueous electrolyte battery Expired - Fee Related JP3258678B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20816791A JP3258678B2 (en) 1991-08-20 1991-08-20 Non-aqueous electrolyte battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20816791A JP3258678B2 (en) 1991-08-20 1991-08-20 Non-aqueous electrolyte battery

Publications (2)

Publication Number Publication Date
JPH0547369A true JPH0547369A (en) 1993-02-26
JP3258678B2 JP3258678B2 (en) 2002-02-18

Family

ID=16551768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20816791A Expired - Fee Related JP3258678B2 (en) 1991-08-20 1991-08-20 Non-aqueous electrolyte battery

Country Status (1)

Country Link
JP (1) JP3258678B2 (en)

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US6596439B1 (en) 2000-04-26 2003-07-22 Quallion Llc Lithium ion battery capable of being discharged to zero volts
US7177691B2 (en) 1999-07-30 2007-02-13 Advanced Bionics Corporation Implantable pulse generators using rechargeable zero-volt technology lithium-ion batteries
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KR20170009831A (en) 2014-06-13 2017-01-25 가부시키가이샤 시세이도 α-gel intermediate composition and a process for producing α-gel-containing O / W emulsion cosmetic using the composition

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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