JP3331649B2 - Non-aqueous electrolyte secondary battery - Google Patents
Non-aqueous electrolyte secondary batteryInfo
- Publication number
- JP3331649B2 JP3331649B2 JP35401092A JP35401092A JP3331649B2 JP 3331649 B2 JP3331649 B2 JP 3331649B2 JP 35401092 A JP35401092 A JP 35401092A JP 35401092 A JP35401092 A JP 35401092A JP 3331649 B2 JP3331649 B2 JP 3331649B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- lithium
- type
- negative electrode
- 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.)
- Expired - Lifetime
Links
- 239000011255 nonaqueous electrolyte Substances 0.000 title claims description 12
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 6
- 229910003002 lithium salt Inorganic materials 0.000 claims description 5
- 159000000002 lithium salts Chemical class 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 2
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000008961 swelling Effects 0.000 description 5
- 239000003575 carbonaceous material Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 4
- -1 lithium hexafluorophosphate Chemical compound 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000010416 ion conductor Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910018871 CoO 2 Inorganic materials 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910002102 lithium manganese oxide Inorganic materials 0.000 description 2
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 2
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 2
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000005486 organic electrolyte Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- CFJRPNFOLVDFMJ-UHFFFAOYSA-N titanium disulfide Chemical compound S=[Ti]=S CFJRPNFOLVDFMJ-UHFFFAOYSA-N 0.000 description 2
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910007857 Li-Al Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 229910017326 LixMn Inorganic materials 0.000 description 1
- 229910008447 Li—Al Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- AGRMSONEJGKOQO-UHFFFAOYSA-K [Li+].[Li+].[Li+].CS([O-])(=O)=O.CS([O-])(=O)=O.CS([O-])(=O)=O Chemical compound [Li+].[Li+].[Li+].CS([O-])(=O)=O.CS([O-])(=O)=O.CS([O-])(=O)=O AGRMSONEJGKOQO-UHFFFAOYSA-K 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000000010 aprotic solvent Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000003115 supporting electrolyte Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子機器の駆動用電源
もしくはメモリ保持電源あるいは、電気自動車用電池と
しての高エネルギー密度でかつ高い安全性を有する非水
電解質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 non-aqueous electrolyte secondary battery having a high energy density and a high safety as a power source for driving electronic equipment or a memory holding power source or a battery for an electric vehicle.
【０００２】[0002]
【従来の技術とその課題】電子機器の急激なる小形軽量
化に伴い、その電源である電池に対して小形で軽量かつ
高エネルギー密度で、更に繰り返し充放電が可能な二次
電池の開発への要求が高まっている。これら要求を満た
す二次電池として、非水電解質二次電池が最も有望であ
る。2. Description of the Related Art With the rapid reduction in size and weight of electronic equipment, the development of secondary batteries that are small, lightweight, have a high energy density, and can be repeatedly charged and discharged with respect to the battery that is the power source of the electronic equipment has been developed. Demands are growing. As a secondary battery satisfying these requirements, a non-aqueous electrolyte secondary battery is most promising.
【０００３】非水電解質二次電池の正極活物質には、二
硫化チタンをはじめとしてリチウムコバルト複合酸化
物、スピネル型リチウムマンガン酸化物、五酸化バナジ
ウムおよび三酸化モリブデンなどの種々のものが検討さ
れている。なかでも、リチウムコバルト複合酸化物（Li
xCoO2 ）は、４Ｖ(Li/Li+ ) 以上のきわめて貴な電位で
充放電を行うため、正極として用いることで高い放電電
圧を有する電池が実現できる。As the positive electrode active material of the nonaqueous electrolyte secondary battery, various substances such as titanium disulfide, lithium cobalt composite oxide, spinel type lithium manganese oxide, vanadium pentoxide and molybdenum trioxide have been studied. ing. Among them, lithium cobalt composite oxide (Li
Since xCoO 2 ) charges and discharges at a very noble potential of 4 V (Li / Li + ) or more, a battery having a high discharge voltage can be realized by using it as a positive electrode.
【０００４】非水電解質二次電池の負極活物質は、金属
リチウムをはじめとしてリチウムの吸蔵・放出が可能な
Ｌｉ−Ａｌ合金や炭素材料など種々のものが検討されて
いるが、なかでも炭素材料は、安全性が高くかつサイク
ル寿命の長い電池が得られるという利点がある。As the negative electrode active material of the non-aqueous electrolyte secondary battery, various types of materials such as lithium metal and Li-Al alloys capable of inserting and extracting lithium and carbon materials have been studied. Has an advantage that a battery having high safety and a long cycle life can be obtained.
【０００５】リチウム塩には、過塩素酸リチウム、三フ
ッ化トリメタンスルフォン酸リチウム、六フッ化燐酸リ
チウムなどが一般に用いられている。なかでも六フッ化
燐酸リチウムは、安全性が高くかつ溶解させた電解液の
イオン導電率が高いという理由から近年盛んに用いられ
るようになってきた。As the lithium salt, lithium perchlorate, lithium trimethanesulfonate, lithium hexafluorophosphate and the like are generally used. Among them, lithium hexafluorophosphate has been widely used in recent years because of its high safety and high ionic conductivity of a dissolved electrolyte.
【０００６】電池ケースには、円筒型、ガム型をはじめ
角型、長円型などがある。円筒型は、最も汎用されてい
るが、スペース効率が悪い。ガム型および角型はスペー
ス効率に最も高く、長円型は円筒型と角型との中間であ
る。[0006] The battery case includes a cylindrical type, a gum type, a square type, an elliptical type, and the like. Cylindrical types are most commonly used, but have poor space efficiency. Gum and square shapes are the most space efficient, and oval shapes are intermediate between cylindrical and square shapes.
【０００７】しかし、リチウムコバルト複合酸化物（Li
X CoO2 ）正極と、炭素材料負極と、リチウム塩を含有
する非水電解質とからなる発電要素を、スペース効率に
優れるガム型、角型および長円型などの電池ケースに収
納した電池は、充電後電池が膨れるという問題があっ
た。電池の膨れは、近年高集漬化が進んでいる電子機器
においては周辺部品の破壊や、電池収納ケースの破壊な
どを引き起こす。また、組電池においては、電池間の接
続リードの切断や、リードを接続している端子の変形な
ど様々な問題を引き起こす。However, lithium cobalt composite oxide (Li
X CoO 2 ) A battery in which a power generation element composed of a positive electrode, a carbon material negative electrode, and a non-aqueous electrolyte containing a lithium salt is housed in a battery case such as a gum type, a square type, and an elliptical type having excellent space efficiency, There is a problem that the battery swells after charging. The swelling of the battery causes the destruction of peripheral parts, the destruction of the battery storage case, and the like in electronic devices that have been increasingly immersed in recent years. Further, in the assembled battery, various problems such as disconnection of connection leads between batteries and deformation of terminals connecting the leads are caused.
【０００８】この対策として、ケースの板厚を大きくす
る方法およびケースの材質に強度の高いステンレスやチ
タンを用いる方法などを検討した。その結果、膨れの問
題は若干改善されるものの、前者の方法では重量および
容量当たりのエネルギー密度が低下するという問題が生
じ、後者の方法では電池の製造コストが高くなるという
問題が生じた。As a countermeasure, a method of increasing the thickness of the case and a method of using high-strength stainless steel or titanium for the material of the case were studied. As a result, although the problem of blistering is slightly improved, the former method has a problem that the energy density per weight and capacity is reduced, and the latter method has a problem that the manufacturing cost of the battery is increased.
【０００９】[0009]
【課題を解決するための手段】本発明は、リチウムを吸
蔵放出する物質からなる負極と、正極と、リチウム塩を
含有する非水電解質とを備え、電極を渦巻状に巻回して
なる発電要素を、断面に角部のないアーチ型あるいはＳ
字型の電池ケースに収納することで上記問題点を解決し
ようとするものである。SUMMARY OF THE INVENTION The present invention provides a power generating element comprising a negative electrode made of a substance capable of inserting and extracting lithium, a positive electrode, and a non-aqueous electrolyte containing a lithium salt, wherein the electrode is spirally wound. With an arch or S without cross-section
The above-mentioned problem is intended to be solved by storing the battery pack in a battery-shaped battery case.
【００１０】[0010]
【作用】正極活物質であるリチウムコバルト複合酸化物
（LiX CoO2 ）は層状構造を有するが、リチウムイオン
の脱離をともなう充電反応の進行とともに、コバルト−
酸素層間が伸び、結晶が膨張することが知られている。
負極に用いる炭素材料も、層状構造を有しリチウムの挿
入にともなう充電反応の進行とともに、結晶が膨張する
ことが知られている。すなわち、これら正負極からなる
発電要素は、充電反応において体積が膨張し、放電反応
において収縮することとなる。これら発電要素を、スペ
ース効率に優れるガム型、角型および長円型などの電池
ケースに収納した電池が充電時に膨れる原因は、ケース
耐圧強度が低いためであると考えられる。[Function] Lithium-cobalt composite oxide (Li X CoO 2 ), which is a positive electrode active material, has a layered structure, but with the progress of charging reaction accompanied by elimination of lithium ions, cobalt-
It is known that the oxygen layer extends and the crystal expands.
It is known that the carbon material used for the negative electrode also has a layered structure, and the crystal expands as the charging reaction proceeds with the insertion of lithium. In other words, the power generating element composed of these positive and negative electrodes expands in volume in a charging reaction and contracts in a discharging reaction. It is considered that the reason why a battery in which these power generating elements are housed in a battery case such as a gum type, a square type, or an elliptical type having excellent space efficiency swells at the time of charging is due to a low pressure resistance of the case.
【００１１】一方、電極を渦巻状に巻回してなる発電要
素を円筒型ケースに収納した電池は、ケースの耐圧が高
いため充電時における膨れの問題はないもののスペース
効率に劣る。しかしながら、本発明電池のように、電極
を渦巻状に巻回してなる発電要素を、断面に角部のない
アーチ型あるいはＳ字型の電池ケースに収納した電池
は、ケースの耐圧が高いため充電時の電池の膨れが解決
される上に、電池ケースの角部に無駄なスペースがない
ために、スペース効率に優れるという特徴を有する。On the other hand, a battery in which a power generation element formed by spirally winding electrodes is housed in a cylindrical case has a high pressure resistance of the case and does not have a problem of swelling during charging, but is inferior in space efficiency. However, as in the battery of the present invention, a battery in which an electrode is spirally wound and a power generating element is housed in an arch-shaped or S-shaped battery case having no corners in cross section has a high withstand voltage of the case, and thus is charged. In addition to solving the problem of battery swelling at the time, there is no space at the corners of the battery case, so that the space efficiency is excellent.
【００１２】[0012]
【実施例】以下に、好適な実施例を用いて本発明を説明
する。The present invention will be described below with reference to preferred embodiments.
【００１３】正極は、リチウムコバルト複合酸化物（Li
xCoO2 ）と導電剤としてのカーボン粉末および結着剤と
してのポリフッ化ビニリデンとを９１：２：７の重量比
で混合し、有機溶剤をもちいて調製したペーストを、厚
み１５μｍのステンレス箔の両面に均一に塗布後乾燥処
理したものである。The cathode is made of a lithium-cobalt composite oxide (Li
xCoO 2 ), a carbon powder as a conductive agent, and polyvinylidene fluoride as a binder in a weight ratio of 91: 2: 7, and a paste prepared using an organic solvent was coated on both sides of a 15 μm thick stainless steel foil. And then dried.
【００１４】負極は、黒鉛と結着剤としてのフッ素樹脂
粉末とを９１：９の重量比で混合し、有機溶剤を用いて
調製したペーストを厚み１５μｍのステンレス箔の両面
に均一に塗布後乾燥処理をしたものである。The negative electrode is prepared by mixing graphite and a fluororesin powder as a binder at a weight ratio of 91: 9, applying a paste prepared using an organic solvent to both surfaces of a 15 μm-thick stainless steel foil, and drying. It has been processed.
【００１５】図１は、電池の縦断面および横断面図であ
る。この図において１は、鉄にニッケルメッキを施した
鋼板（厚み０．４ｍｍ）を打ち抜き加工したアーチ型ケ
ース、２はステンレス(SUS304)を打ち抜き加工した封口
板であり、正極端子３（SUS304) および負極端子４（SU
S304) がガラスハーメチックシールにより固定されてい
る。５はポリプロピレンからなるセパレーター、６は正
極であり正極端子３とリードにより電気的に接続されて
いる。７は負極であり負極端子４と電気的に接続されて
いる。セパレーター、正極、負極は渦巻状に巻回して電
池ケース内に挿入、電解液を注液後、ケース１および封
口板２の接合部をレーザーにより溶接して電池を密閉封
口している。上記電池の圧迫度（電池ケースの内寸÷極
板厚み）は０．９とした。FIG. 1 is a longitudinal sectional view and a transverse sectional view of a battery. In this figure, 1 is an arched case formed by stamping a steel plate (thickness: 0.4 mm) obtained by plating nickel on iron, 2 is a sealing plate formed by stamping stainless steel (SUS304), and a positive electrode terminal 3 (SUS304) and Negative electrode terminal 4 (SU
(S304) is fixed by a glass hermetic seal. Reference numeral 5 denotes a polypropylene separator, and reference numeral 6 denotes a positive electrode, which is electrically connected to the positive electrode terminal 3 by a lead. Reference numeral 7 denotes a negative electrode, which is electrically connected to the negative electrode terminal 4. The separator, the positive electrode, and the negative electrode are spirally wound and inserted into the battery case. After the electrolyte is injected, the junction between the case 1 and the sealing plate 2 is welded by a laser to hermetically seal the battery. The compression degree of the battery (the inner size of the battery case divided by the thickness of the electrode plate) was set to 0.9.
【００１６】有機電解液にはエチレンカーボネート（E
C）とジメチルカーボネート（DMC ）とジエチルカーボ
ネート（DEC ）とを体積比２：２：１で混合した溶媒
に、１モル／リットルの６フッ化燐酸リチウムと０．０
５モル／リットルの過塩素酸リチウムとを溶解させたも
のを用いた。[0016] Ethylene carbonate (E
C), dimethyl carbonate (DMC) and diethyl carbonate (DEC) in a mixed solvent of 2: 2: 1 by volume, and 1 mol / l of lithium hexafluorophosphate and 0.02
A solution prepared by dissolving 5 mol / liter of lithium perchlorate was used.
【００１７】上記の正極板，負極板，電解液および電池
ケースを用いた本発明の有機電解液二次電池を（Ａ）、
図２に示すＳ字型の電池ケースを用いることの他は
（Ａ）と同様の構成とした本発明電池を（Ｂ）と呼ぶ。
これら両者の電池サイズは、高さ１００ｍｍ、厚み１０
ｍｍ、幅５０ｍｍである。The organic electrolyte secondary battery of the present invention using the above-mentioned positive electrode plate, negative electrode plate, electrolyte solution and battery case is (A)
The battery of the present invention having the same configuration as that of (A) except that the S-shaped battery case shown in FIG. 2 is used is referred to as (B).
Both of these battery sizes are 100 mm in height and 10 in thickness.
mm and a width of 50 mm.
【００１８】また、図３および図４に示すように短冊状
のセパレータ５、正極板６および負極板７を積層してな
る発電要素を、アーチ型あるいはＳ字型の電池ケースに
収納することの外は本発明電池（Ａ）と同様の構成とし
た参考例電池をそれぞれ（Ｃ）、（Ｄ）と呼ぶ。電池サ
イズは、両者ともに高さ１００ｍｍ、厚み１０ｍｍ、幅
５０ｍｍである。As shown in FIGS. 3 and 4, a power generating element formed by laminating a strip-shaped separator 5, a positive electrode plate 6 and a negative electrode plate 7 is housed in an arched or S-shaped battery case. Outside, reference example batteries having the same configuration as the battery (A) of the present invention are referred to as (C) and (D), respectively. The battery size is 100 mm in height, 10 mm in thickness, and 50 mm in width in both cases.
【００１９】比較のために、図５に示すようにセパレー
ター５、正極６、負極７を渦巻状に巻回して長円型電池
ケース内に挿入したことの他は、本発明電池（Ａ）と同
様の構成とした比較電池を（ア）と呼び、図６に示すよ
うに、短冊状のセパレーター５、正極板６および負極板
７を積層してなる発電要素を、ガム型の電池ケースに収
納することの外は本発明電池（Ａ）と同様の構成とした
比較電池を（イ）とよぶ。電池（ア）（イ）のサイズ
は、高さ１００ｍｍ、厚み１０ｍｍ、幅５０ｍｍであ
る。For comparison, the battery of the present invention (A) was the same as the battery of the present invention (A) except that the separator 5, the positive electrode 6, and the negative electrode 7 were spirally wound and inserted into the oblong battery case as shown in FIG. A comparative battery having a similar configuration is referred to as (A), and as shown in FIG. 6, a power generating element formed by laminating a strip-shaped separator 5, a positive electrode plate 6, and a negative electrode plate 7 is housed in a gum-type battery case. A comparative battery having the same configuration as that of the battery (A) of the present invention is referred to as (A). The sizes of the batteries (A) and (A) are 100 mm in height, 10 mm in thickness, and 50 mm in width.
【００２０】次に、これらの電池を５００ｍＡの定電流
で、端子電圧が４．１Ｖに至るまで充電して、つづい
て、同じく２．０mAの定電流で、端子電圧が３Ｖに達す
るまで放電する充放電サイクル試験を室温下で１０サイ
クルおこなった。充電状態で停止した後、電池の膨れの
測定をおこなった。各電池の充電前と充電後の部分厚み
を表１に示す。Next, these batteries are charged at a constant current of 500 mA until the terminal voltage reaches 4.1 V, and then discharged at the same constant current of 2.0 mA until the terminal voltage reaches 3 V. The charge / discharge cycle test was performed at room temperature for 10 cycles. After stopping in the charged state, the swelling of the battery was measured. Table 1 shows the partial thickness of each battery before and after charging.
【００２１】[0021]
【表１】 表１の結果から明らかなように、比較電池（ア）、
（イ）では、電池厚みが増大しているのに対し、本発明
電池（Ａ）、（Ｂ）および参考例電池（Ｃ）、（Ｄ）で
は厚みの増大が見られない。次に、高さ１００ｍｍ、直
径１０ｍｍの円筒型電池と、本発明電池（Ａ）、（Ｂ）
および参考例電池（Ｃ）、（Ｄ）について、組電池のス
ペース効率を比較した。幅５０ｍｍ、奥行き１００ｍｍ
の長方形の床に電池を立てて収納する場合の充填様式を
図７に、幅５０ｍｍ、奥行き１０５ｍｍの長方形の床に
電池を立てて収納する場合の充填様式を図８に示す。ま
た、組電池の投影総面積を表２にまとめた。[Table 1] As is clear from the results in Table 1, the comparative batteries (A),
In (a), the thickness of the battery is increased, whereas in the batteries (A) and (B) of the present invention and the batteries (C) and (D) of the reference example, the thickness is not increased. Next, a cylindrical battery having a height of 100 mm and a diameter of 10 mm, and batteries (A) and (B) of the present invention.
And the space efficiency of the assembled battery was compared about the reference example batteries (C) and (D). 50mm in width, 100mm in depth
FIG. 7 shows a filling mode when batteries are set up and stored on a rectangular floor of FIG. 8, and FIG. 8 shows a charging mode when batteries are set up and stored on a rectangular floor having a width of 50 mm and a depth of 105 mm. Table 2 summarizes the total projected area of the battery pack.
【００２２】[0022]
【表２】 結果から明らかなように、本発明電池は、円筒型電池と
比較してスペース効率が１０％〜１８％高くなる。[Table 2] As is clear from the results, the battery of the present invention has a space efficiency of 10% to 18% higher than that of the cylindrical battery.
【００２３】なお、上記実施例では正極活物質としてリ
チウムコバルト複合酸化物を用いる場合を説明したが、
二硫化チタンをはじめとして二酸化マンガン、スピネル
型リチウムマンガン酸化物(LixMn2 O4 ) 、五酸化バナ
ジウムおよび三酸化モリブデンなどの種々のものを用い
ることができる。また、負極として炭素材料を用いた
が、本発明の正極を使用するにあたり、負極活物質は基
本的に限定されず従来の非水電解液二次電池に用いられ
ている負極活物質、たとえば純リチウム、リチウム合金
などを用いることができる。In the above embodiment, the case where the lithium-cobalt composite oxide is used as the positive electrode active material has been described.
Various materials such as titanium disulfide, manganese dioxide, spinel type lithium manganese oxide (LixMn 2 O 4 ), vanadium pentoxide, and molybdenum trioxide can be used. In addition, although a carbon material was used as the negative electrode, in using the positive electrode of the present invention, the negative electrode active material was not basically limited, and the negative electrode active material used in the conventional nonaqueous electrolyte secondary battery, for example, pure Lithium, a lithium alloy, or the like can be used.
【００２４】さらに、リチウムイオン伝導性物質である
電解液や固体のイオン導電体も基本的に限定されず、従
来の有機電解液二次電池に用いられているものを用いる
ことが出来る。たとえば、有機溶媒としては非プロトン
溶媒であるエチレンカーボネイトなどの環状エステル類
およびテトラハイドロフラン，ジオキソランなどのエー
テル類があげられ、これら単独もしくは２種以上を混合
した溶媒を用いることが出来る。固体のイオン導電体と
しては、リチウムイオン導電性を有するものであれば用
いることが出来る。その代表的なものとして、ポリエチ
レンオキサイドなどがあげられる。また、このような非
水溶媒あるいは固体のイオン導電体に溶解される支持電
解質も基本的に限定されるものではない。たとえば、 L
iAsF6 ，LiPF6 ，LiCF3 SO3 などの１種以上を用いるこ
とができる。Furthermore, the electrolyte or solid ionic conductor which is a lithium ion conductive material is not fundamentally limited, and those used in conventional organic electrolyte secondary batteries can be used. For example, examples of the organic solvent include cyclic esters such as ethylene carbonate, which are aprotic solvents, and ethers such as tetrahydrofuran and dioxolan, and a single or a mixture of two or more thereof can be used. As the solid ionic conductor, any one having lithium ion conductivity can be used. A typical example is polyethylene oxide. Further, the supporting electrolyte dissolved in such a non-aqueous solvent or solid ionic conductor is not basically limited. For example, L
One or more of iAsF 6 , LiPF 6 and LiCF 3 SO 3 can be used.
【００２５】[0025]
【発明の効果】上述したごとく、リチウムを吸蔵放出す
る物質からなる負極と、正極と、リチウム塩を含有する
非水電解質とを備え、電極を渦巻状に巻回してなる発電
要素を、断面に角部のないアーチ型あるいはＳ字型の電
池ケースに収納したことを特徴とする非水電解質二次電
池は、充電時の電池の膨れが効果的に抑制できる上に、
電池収納スペースを有効に利用できるものであり、その
工業的価値は極めて大である。As described above, a power generating element comprising a negative electrode made of a substance capable of inserting and extracting lithium, a positive electrode, and a non-aqueous electrolyte containing a lithium salt, and having a spirally wound electrode, has a cross section. The non-aqueous electrolyte secondary battery, which is characterized by being housed in an arched or S-shaped battery case without corners, can effectively suppress swelling of the battery during charging,
The battery storage space can be used effectively, and its industrial value is extremely large.
【図１】アーチ型電池（渦巻式）の内部構造を示した
図。FIG. 1 is a diagram showing the internal structure of an arch type battery (spiral type).
【図２】Ｓ字型電池（渦巻式）の内部構造を示した図。FIG. 2 is a diagram showing the internal structure of an S-shaped battery (spiral type).
【図３】アーチ型電池（積層式）の内部構造を示した
図。FIG. 3 is a diagram showing an internal structure of an arch type battery (stacked type).
【図４】Ｓ字型電池（積層式）の内部構造を示した図。FIG. 4 is a diagram showing an internal structure of an S-shaped battery (stacked type).
【図５】長円型電池（渦巻式）の内部構造を示した図。FIG. 5 is a diagram showing the internal structure of an elliptical battery (spiral type).
【図６】ガム型電池（積層式）の内部構造を示した図。FIG. 6 is a diagram showing an internal structure of a gum type battery (stacked type).
【図７】円筒型、アーチ型（渦巻式および積層式）、Ｓ
字型（渦巻式および積層式）電池の組電池充填様式を示
した図（スペース幅５０ｍｍ×奥行き１００ｍｍ）。FIG. 7: cylindrical type, arch type (spiral type and laminated type), S
The figure (space width 50mm x depth 100mm) which showed the assembled battery filling style of the character type (spiral type and stack type) battery.
【図８】円筒型、アーチ型（渦巻式および積層式）、Ｓ
字型（渦巻式および積層式）電池の組電池充填様式を示
した図（スペース幅５０ｍｍ×奥行き１０５ｍｍ）。FIG. 8: cylindrical type, arch type (spiral type and laminated type), S
The figure (space width 50mm x depth 105mm) which showed the assembled battery filling style of the character type (spiral type and stack type) battery.
１ 電池ケース ２ 封口板 ３ 正極端子 ４ 負極端子 ５ セパレーター ６ 正極 ７ 負極 DESCRIPTION OF SYMBOLS 1 Battery case 2 Sealing plate 3 Positive electrode terminal 4 Negative electrode terminal 5 Separator 6 Positive electrode 7 Negative electrode
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 10/40 H01M 2/00 - 2/08 H01M 6/16 H01M 10/04 Continuation of the front page (58) Field surveyed (Int.Cl. 7 , DB name) H01M 10/40 H01M 2/00-2/08 H01M 6/16 H01M 10/04
Claims (1)
と、正極と、リチウム塩を含有する非水電解質とを備
え、電極を渦巻状に巻回してなる発電要素を、断面に角
部のないアーチ型あるいはＳ字型の電池ケースに収納し
たことを特徴とする非水電解質二次電池。 Bei a negative electrode of lithium comprising a a material storage and release [1 claim], a positive electrode, a nonaqueous electrolyte containing a lithium salt
For example, a power generating element formed by winding an electrode in a spiral shape, square in section
A non-aqueous electrolyte secondary battery which is housed in an arched or S-shaped battery case having no part .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35401092A JP3331649B2 (en) | 1992-12-14 | 1992-12-14 | Non-aqueous electrolyte secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35401092A JP3331649B2 (en) | 1992-12-14 | 1992-12-14 | Non-aqueous electrolyte secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06181069A JPH06181069A (en) | 1994-06-28 |
| JP3331649B2 true JP3331649B2 (en) | 2002-10-07 |
Family
ID=18434705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35401092A Expired - Lifetime JP3331649B2 (en) | 1992-12-14 | 1992-12-14 | Non-aqueous electrolyte secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3331649B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10910663B2 (en) | 2017-12-27 | 2021-02-02 | Samsung Electronics Co., Ltd. | Secondary battery |
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|---|---|---|---|---|
| TW385558B (en) * | 1998-01-05 | 2000-03-21 | Voltec Pte Ltd | A battery |
| US5958088A (en) * | 1998-03-04 | 1999-09-28 | Duracell, Inc. | Prismatic cell construction |
| US6613474B2 (en) | 2000-04-06 | 2003-09-02 | Wilson Greatbatch Ltd. | Electrochemical cell having a casing of mating portions |
| AU2001274813A1 (en) * | 2000-04-25 | 2001-11-07 | Polystor Corporation | Custom geometry battery cells and methods and tools for their manufacture |
| US7163762B2 (en) | 2000-11-21 | 2007-01-16 | Sony Corporation | Polymer electrolyte battery and method of producing same |
| US6610443B2 (en) | 2001-03-19 | 2003-08-26 | Wilson Greatbatch Ltd. | One-piece header assembly for hermetic battery terminal feedthrough, fill and closure designs |
| DE60235598D1 (en) | 2001-07-19 | 2010-04-22 | Greatbatch Ltd | Curved housing for an implantable medical device |
| US6977124B2 (en) | 2001-07-19 | 2005-12-20 | Wilson Greatbatch Technologies, Inc. | Contoured casing for an electrochemical cell |
| JP2005501385A (en) * | 2001-08-24 | 2005-01-13 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Lithium battery manufacturing method, lithium battery and electric device |
| US6946220B2 (en) | 2001-10-19 | 2005-09-20 | Wilson Greatbatch Technologies, Inc. | Electrochemical cell having a multiplate electrode assembly housed in an irregularly shaped casing |
| KR101382554B1 (en) * | 2010-09-06 | 2014-04-07 | 주식회사 엘지화학 | Battery Cell of Curved Shape and Battery Pack Employed with the Same |
| KR101464965B1 (en) * | 2012-02-27 | 2014-11-25 | 주식회사 엘지화학 | Manufacturing of Battery Cell by Curbed Shaped |
| KR20150068759A (en) * | 2013-12-12 | 2015-06-22 | 삼성에스디아이 주식회사 | Rechargeable battery |
| KR102195733B1 (en) * | 2014-01-20 | 2020-12-28 | 삼성에스디아이 주식회사 | Curved secondary battery |
| KR102198003B1 (en) | 2014-04-16 | 2021-01-04 | 삼성에스디아이 주식회사 | Battery pack |
| KR102234286B1 (en) * | 2014-09-16 | 2021-03-31 | 삼성에스디아이 주식회사 | Curved secondary battery |
-
1992
- 1992-12-14 JP JP35401092A patent/JP3331649B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10910663B2 (en) | 2017-12-27 | 2021-02-02 | Samsung Electronics Co., Ltd. | Secondary battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06181069A (en) | 1994-06-28 |
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