JPH04332481A - Nonaqueous electrolyte secondary battery - Google Patents
Nonaqueous electrolyte secondary batteryInfo
- Publication number
- JPH04332481A JPH04332481A JP3130686A JP13068691A JPH04332481A JP H04332481 A JPH04332481 A JP H04332481A JP 3130686 A JP3130686 A JP 3130686A JP 13068691 A JP13068691 A JP 13068691A JP H04332481 A JPH04332481 A JP H04332481A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- center pin
- electrode
- center
- case
- 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
- 239000011255 nonaqueous electrolyte Substances 0.000 title claims description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 15
- 238000003780 insertion Methods 0.000 abstract description 13
- 230000037431 insertion Effects 0.000 abstract description 13
- 239000003792 electrolyte Substances 0.000 abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 6
- 239000010935 stainless steel Substances 0.000 abstract description 5
- 230000002950 deficient Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 2
- 239000000203 mixture Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000004804 winding Methods 0.000 description 8
- 239000012212 insulator Substances 0.000 description 7
- -1 transition metal chalcogenides Chemical class 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 239000000571 coke Substances 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000006253 pitch coke Substances 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910032387 LiCoO2 Inorganic materials 0.000 description 2
- 229910001290 LiPF6 Inorganic materials 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 0.000 description 1
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 1
- PPDFQRAASCRJAH-UHFFFAOYSA-N 2-methylthiolane 1,1-dioxide Chemical compound CC1CCCS1(=O)=O PPDFQRAASCRJAH-UHFFFAOYSA-N 0.000 description 1
- SBUOHGKIOVRDKY-UHFFFAOYSA-N 4-methyl-1,3-dioxolane Chemical compound CC1COCO1 SBUOHGKIOVRDKY-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910015044 LiB Inorganic materials 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
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011335 coal coke Substances 0.000 description 1
- 229910021446 cobalt carbonate Inorganic materials 0.000 description 1
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 description 1
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910021397 glassy carbon Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 229910001540 lithium hexafluoroarsenate(V) Inorganic materials 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000011301 petroleum pitch Substances 0.000 description 1
- 229920001197 polyacetylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 1
- 239000002296 pyrolytic carbon Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- RCYJPSGNXVLIBO-UHFFFAOYSA-N sulfanylidenetitanium Chemical compound [S].[Ti] RCYJPSGNXVLIBO-UHFFFAOYSA-N 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
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)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は非水電解液二次電池に関
し、特に電極が渦巻式電極である非水電解液二次電池に
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, and more particularly to a non-aqueous electrolyte secondary battery whose electrodes are spiral electrodes.
【０００２】0002
【従来の技術】近年の電子技術のめざましい進歩は、電
子機器の小型・軽量化を次々と実現させている。それに
伴い、移動用電源としての電池に対しても益々小型・軽
量且つ高エネルギー密度のものが求められるようになっ
てきている。2. Description of the Related Art The remarkable progress in electronic technology in recent years has led to successive reductions in the size and weight of electronic devices. Along with this, batteries as mobile power sources are increasingly required to be smaller, lighter, and have higher energy density.
【０００３】従来、一般用途の二次電池としては鉛電池
、ニッケル・カドミウム電池等の水溶液系電池が主流で
あった。しかし、これらの二次電池はサイクル特性には
優れるものの、電池重量やエネルギー密度の点では十分
満足できるものとは言えない。Conventionally, aqueous batteries such as lead batteries and nickel-cadmium batteries have been mainstream as secondary batteries for general use. However, although these secondary batteries have excellent cycle characteristics, they are not fully satisfactory in terms of battery weight and energy density.
【０００４】そこで、最近、このような鉛電池等の水溶
液系二次電池に代わる二次電池としてリチウムあるいは
リチウム合金を負極に用いた非水電解液二次電池、さら
には、炭素質材料等のリチウムをドープ／脱ドープし得
る材料を負極に使用した非水電解液二次電池が提案され
ている。これらの非水電解液二次電池は、高エネルギー
密度を有し、自己放電も少なく、しかも軽量という移動
用電源として優れた特性を有するものであり、たとえば
ビデオ・カメラやラップ・トップ・パソコン等の機器用
電源としての使用が期待されている。[0004]Recently, nonaqueous electrolyte secondary batteries using lithium or lithium alloy as the negative electrode, as well as carbonaceous materials and other secondary batteries, have been developed to replace aqueous secondary batteries such as lead batteries. Non-aqueous electrolyte secondary batteries have been proposed in which a material that can be doped/undoped with lithium is used for the negative electrode. These non-aqueous electrolyte secondary batteries have high energy density, low self-discharge, and are lightweight, making them excellent as mobile power sources, such as for video cameras, laptops, personal computers, etc. It is expected that it will be used as a power source for equipment.
【０００５】ところで、ビデオ・カメラ等の機器は比較
的消費電流が大きいため、これらの機器に使用される電
源としてもその消費電流に対応できることが要求される
。そして、そのような要求に応える非水電解液二次電池
として、渦巻式電極を使用する非水電解液二次電池が提
案されている。By the way, since devices such as video cameras consume relatively large amounts of current, the power supplies used in these devices are required to be able to cope with the current consumption. As a nonaqueous electrolyte secondary battery that meets such demands, a nonaqueous electrolyte secondary battery using a spiral electrode has been proposed.
【０００６】この非水電解液二次電池に使用される渦巻
式電極は、たとえば帯状の正極と負極とをセパレータを
介して、負極，セパレータ，正極，セパレータの順に４
層に積層させ、この４層構造の積層電極体を、巻取り芯
を中心にして渦巻き状に多数回巻回した後、上記巻取り
芯を除去して得られるものである。この渦巻式電極は、
電極面積が大きく、重負荷に耐えられることから、大供
給電流が要求される電池の電極として適している。[0006] The spiral electrode used in this non-aqueous electrolyte secondary battery has, for example, a strip-shaped positive electrode and a negative electrode interposed in the order of negative electrode, separator, positive electrode, and separator.
It is obtained by stacking the four-layered electrode body in a spiral manner a number of times around a winding core, and then removing the winding core. This spiral electrode is
Since the electrode area is large and it can withstand heavy loads, it is suitable as an electrode for batteries that require a large supply current.
【０００７】しかしながら、この電極が渦巻式電極構造
である非水電解液二次電池においては、充放電の繰り返
しに伴って電池中心部に内部短絡が生じる場合があると
いった問題を有している。すなわち、上記非水電解液二
次電池では、充放電の繰り返しによって電極の体積が増
加するという現象が見られる。ここで、渦巻式電極は、
金属製缶内に収納されているので外方には膨張する事は
できないが、中心部は巻取り芯除去後の空隙を有してい
るため、体積増加量はこの空隙を有する中心部に集中す
ることとなる。そうなると、電極中心部付近の電極が変
形してセパレーターを突き破り、その結果、正極板と負
極板が接触して内部短絡を起こすといった不都合が生じ
ることとなる。However, nonaqueous electrolyte secondary batteries in which the electrodes have a spiral electrode structure have a problem in that internal short circuits may occur in the center of the battery due to repeated charging and discharging. That is, in the non-aqueous electrolyte secondary battery described above, a phenomenon is observed in which the volume of the electrode increases due to repeated charging and discharging. Here, the spiral electrode is
Since it is housed in a metal can, it cannot expand outward, but since there is a void in the center after the winding core is removed, the volume increase is concentrated in the center with this void. I will do it. In this case, the electrode near the center of the electrode deforms and breaks through the separator, resulting in the inconvenience that the positive electrode plate and the negative electrode plate come into contact and cause an internal short circuit.
【０００８】このような非水電解液二次電池の電極中心
部が変形することによって生ずる内部短絡を防止するた
めに、たとえば特開平１−１７５１７６号公報において
、中心空隙部に絶縁体よりなる棒状のセンターピンを設
け、中心部の変形を抑えた非水電解液二次電池が提案さ
れている。しかしながら、上記非水電解液二次電池では
、センターピンを中心空隙部に挿入する際に電解液が溢
れる場合があり、作業性が悪いといった問題を有してい
た。In order to prevent internal short circuits caused by deformation of the electrode center of such a non-aqueous electrolyte secondary battery, for example, in Japanese Patent Application Laid-Open No. 1-175176, a rod-shaped insulator made of an insulator is installed in the center gap. A nonaqueous electrolyte secondary battery has been proposed that has a center pin to suppress deformation of the center. However, the non-aqueous electrolyte secondary battery has a problem in that the electrolyte sometimes overflows when inserting the center pin into the central gap, resulting in poor workability.
【０００９】そこで、このような電解液の溢れを防止す
るために、絶縁体よりなる中空筒状センターピンを使用
した非水電解液二次電池が実開平１−１５５２６２号公
報において開示されている。この非水電解液二次電池で
は、センターピンが中空筒状であるので、センターピン
挿入時の電解液の溢れ防止され、良好な作業性を得るこ
とができる。In order to prevent such electrolyte overflow, a non-aqueous electrolyte secondary battery using a hollow cylindrical center pin made of an insulator is disclosed in Japanese Utility Model Application Publication No. 1-155262. . In this non-aqueous electrolyte secondary battery, since the center pin has a hollow cylindrical shape, the electrolyte is prevented from overflowing when the center pin is inserted, and good workability can be obtained.
【００１０】0010
【発明が解決しようとする課題】しかしながら、中空筒
状の絶縁体は、加圧や熱によって変形して曲がりを生じ
たり、製造時にゲートバリが発生するため、挿入する際
に位置ズレが生じたり、あるいはセパレーターに引っか
かるといったことがしばしば起こる。このため、センタ
ーピンの挿入とともにセパレーターに皺よりや折り返し
が発生し、センターピンとセパレーターのクリアランス
が無くなってセンターピンが完全に挿入されないといっ
た挿入不良が生じ易い。また、絶縁体よりなる中空筒状
のセンターピンは、重量が軽いために自重では中心空隙
部内に挿入されず、挿入する際には、センターピンを挿
入方向に加圧することが必要となる。このため、挿入操
作が複雑となり、電池の生産性を上げるのが困難となる
。さらに、絶縁体よりなる中空筒状センターピンは、強
度が不十分であるために、電池に外部から高圧が加えら
れた場合に破損あるいは変形を生じ、その結果電池の封
口部等が変形して電解液が漏れるといった問題を有して
いる。[Problems to be Solved by the Invention] However, hollow cylindrical insulators are deformed and bent by pressure or heat, and gate burrs are generated during manufacturing, resulting in misalignment when inserted. Or it often gets caught in the separator. For this reason, when the center pin is inserted, the separator is wrinkled or folded back, and the clearance between the center pin and the separator is lost, which tends to cause insertion failure such as the center pin not being completely inserted. Further, since the hollow cylindrical center pin made of an insulator is light in weight, it cannot be inserted into the center gap by its own weight, and when it is inserted, it is necessary to pressurize the center pin in the insertion direction. This complicates the insertion operation and makes it difficult to increase battery productivity. Furthermore, since the hollow cylindrical center pin made of an insulator has insufficient strength, it may break or deform when high pressure is applied to the battery from the outside, resulting in deformation of the battery's sealing part, etc. The problem is that the electrolyte leaks.
【００１１】そこで、本発明はこのような従来の実情に
鑑みて提案されたものであり、センターピンを挿入する
際の挿入不良の発生頻度が低く、高い生産性が得られる
とともに外部から高圧がかかった場合でも変形し難い、
安全性の高い非水電解液二次電池を提供することを目的
とする。[0011] The present invention was proposed in view of these conventional circumstances, and it reduces the frequency of occurrence of incorrect insertion when inserting a center pin, provides high productivity, and eliminates high pressure from the outside. It is difficult to deform even if it is damaged,
The purpose is to provide a highly safe non-aqueous electrolyte secondary battery.
【００１２】0012
【課題を解決するための手段】上述の課題を達成するた
めに、本発明の非水電解液二次電池は、収納缶内に、負
極と正極とがセパレータを介して渦巻き状に積層巻回さ
れてなる巻回体と、該巻回体の中心空隙部に配設された
中空筒状のセンターピンとを収納してなる非水電解液二
次電池において、上記センターピンが金属より構成され
ていることを特徴とするものである。[Means for Solving the Problems] In order to achieve the above-mentioned problems, the non-aqueous electrolyte secondary battery of the present invention has a negative electrode and a positive electrode spirally stacked and wound in a storage can with a separator interposed therebetween. A non-aqueous electrolyte secondary battery that houses a wound body made of a metal material and a hollow cylindrical center pin disposed in a central gap of the wound body, wherein the center pin is made of metal. It is characterized by the presence of
【００１３】本発明の非水電解液二次電池において、セ
ンターピンは、電極中心部への挿入性および電池強度を
確保するために、金属により構成される。上記金属とし
ては、特に制限はなく、種々のものが使用可能であるが
、生産性、加工性、硬度及び耐食性に優れることから、
ステンレス、ニッケル、チタン、スチール等を使用する
ことが望ましい。In the non-aqueous electrolyte secondary battery of the present invention, the center pin is made of metal in order to ensure insertability into the center of the electrode and battery strength. There are no particular restrictions on the above-mentioned metals, and various metals can be used.
It is preferable to use stainless steel, nickel, titanium, steel, etc.
【００１４】また、上記金属よりなるセンターピンの形
状は、電解液の溢れを防止するために中空筒状とされる
。なお、この筒状とは、必ずしも完全な筒状でなくても
よく、たとえば、図４に示すように電池外周の１割以下
の隙間８ａが存在するような筒形状であっても差し支え
ない。ここで、上記中空筒状のセンターピンの先端部は
、電極中心部への挿入を容易なものとするために、テー
パー状とする事が望ましい。また、上記センターピンの
長さは、内部短絡を防止する点からセパレーター幅より
短いことが好ましい。さらに、上記センターピンと電極
とを絶縁するために、渦巻式電極の最内周にセパレータ
等の絶縁体を配置するようにすることが望ましい。Further, the center pin made of the metal mentioned above has a hollow cylindrical shape in order to prevent the electrolyte from overflowing. Note that this cylindrical shape does not necessarily have to be a perfect cylindrical shape, and may be, for example, a cylindrical shape in which a gap 8a of 10% or less of the outer circumference of the battery exists, as shown in FIG. Here, the tip of the hollow cylindrical center pin is preferably tapered to facilitate insertion into the center of the electrode. Further, the length of the center pin is preferably shorter than the separator width in order to prevent internal short circuits. Further, in order to insulate the center pin and the electrode, it is desirable to arrange an insulator such as a separator on the innermost periphery of the spiral electrode.
【００１５】上記非水電解液二次電池において使用され
る負極としては、リチウム等のアルカリ金属や、充放電
反応に伴いリチウム等のアルカリ金属をドープ／脱ドー
プする材料を用いることができる。後者の例としては、
ポリアセチレン、ポリピロール等の導電性ポリマー、あ
るいはコークス、ポリマー炭、カーボン・ファイバー等
の炭素材料を用いることができるが、単位体積当りのエ
ネルギー密度が大きい点から、炭素質材料を使用するこ
とが望ましい。炭素質材料としては、熱分解炭素類、コ
ークス類（石油コークス、ピッチコークス、石炭コーク
ス等）、カーボンブラック（アセチレンブラック等）、
ガラス状炭素、有機高分子材料焼成体（有機高分子材料
を５００℃以上の適当な温度で不活性ガス気流中、ある
いは真空中で焼成したもの）、炭素繊維等が用いられる
。As the negative electrode used in the above non-aqueous electrolyte secondary battery, an alkali metal such as lithium or a material capable of doping/dedoping an alkali metal such as lithium during charge/discharge reactions can be used. An example of the latter is
Although conductive polymers such as polyacetylene and polypyrrole, or carbon materials such as coke, polymer charcoal, and carbon fibers can be used, it is preferable to use carbonaceous materials because of their high energy density per unit volume. Carbonaceous materials include pyrolytic carbons, cokes (petroleum coke, pitch coke, coal coke, etc.), carbon black (acetylene black, etc.),
Glassy carbon, an organic polymeric material fired body (organic polymeric material fired at an appropriate temperature of 500° C. or higher in an inert gas stream or in a vacuum), carbon fiber, etc. are used.
【００１６】一方、正極としては、二酸化マンガン、五
酸化バナジウムのような遷移金属酸化物や、硫化鉄、硫
化チタンのような遷移金属カルコゲン化物、さらにはこ
れらとリチウムとの複合化合物などを用いることができ
る。特に、高電圧、高エネルギー密度が得られ、サイク
ル特性にも優れることから、リチウム・コバルト複合酸
化物やリチウム・コバルト・ニッケル複合酸化物が望ま
しい。On the other hand, for the positive electrode, transition metal oxides such as manganese dioxide and vanadium pentoxide, transition metal chalcogenides such as iron sulfide and titanium sulfide, and composite compounds of these and lithium may be used. Can be done. In particular, lithium-cobalt composite oxides and lithium-cobalt-nickel composite oxides are desirable because they provide high voltage and high energy density and have excellent cycle characteristics.
【００１７】また、電解液としては、例えばリチウム塩
を電解質とし、これを有機溶媒に溶解した電解液が用い
られる。ここで有機溶媒としては、特に限定されるもの
ではないが、例えばプロピレンカーボネート、エチレン
カーボネート、ジエチルカーボネート、１，２−ジメト
キシエタン、１，２−ジエトキシエタン、γ−ブチロラ
クトン、テトラヒドロフラン、１，３−ジオキソラン、
４−メチル−１，３−ジオキソラン、ジエチルエーテル
、スルホラン、メチルスルホラン、セトニトリル、プロ
ピオニトリル等の単独もしくは二種類以上の混合溶媒が
使用できる。電解質も従来より公知のものがいずれも使
用でき、ＬｉＣｌＯ４ 、ＬｉＡｓＦ６ 、ＬｉＰＦ６
、ＬｉＢＦ４ 、ＬｉＢ（Ｃ６ Ｈ５ ）４ 、Ｌｉ
Ｃｌ、ＬｉＢｒ、ＣＨ３ ＳＯ３ ＬＩ、ＣＦ３ ＳＯ
３ Ｌｉ等がある。Further, as the electrolytic solution, for example, an electrolytic solution in which a lithium salt is used as an electrolyte and is dissolved in an organic solvent is used. Here, the organic solvent is not particularly limited, but for example, propylene carbonate, ethylene carbonate, diethyl carbonate, 1,2-dimethoxyethane, 1,2-diethoxyethane, γ-butyrolactone, tetrahydrofuran, 1,3 -dioxolane,
Single or mixed solvents such as 4-methyl-1,3-dioxolane, diethyl ether, sulfolane, methylsulfolane, setonitrile, and propionitrile can be used. Any conventionally known electrolyte can be used, including LiClO4, LiAsF6, LiPF6
, LiBF4 , LiB(C6 H5 )4 , Li
Cl, LiBr, CH3 SO3 LI, CF3 SO
There are 3 Li etc.
【００１８】[0018]
【作用】本発明の非水電解液二次電池は、収納缶内に渦
巻式電極と該渦巻式電極の中心空隙部に配設された金属
性の中空筒状のセンターピンとを収納してなる。電池に
おいて、強度は電池の芯となるセンターピンの材質に依
存することろが大きく、センターピンが硬い金属であれ
ば、電池の強度が確保されて変形が抑えられることとな
る。また、金属よりなるセンターピンは、金属が加工精
度が高くしかもセンターピン形状に加工した後にも、熱
，加圧による変形が生じ難いので、挿入時において所定
形状が維持される。したがって、センターピンを中心空
隙部に挿入する際にセンターピンがセパレータに引っか
かることがなく、センターピンの挿入不良の発生頻度が
低く抑えられる。さらに、上記センターピンは、合成樹
脂等よりなるセンターピンに比べて重量が重く、電極巻
心部に自重で落下して挿入される。このため、センター
ピン挿入時の加圧は、ほとんど不要となり、センターピ
ンの挿入操作が簡易化される。[Operation] The non-aqueous electrolyte secondary battery of the present invention includes a spiral electrode and a metallic hollow cylindrical center pin disposed in the center gap of the spiral electrode in a storage can. . In a battery, the strength largely depends on the material of the center pin that forms the core of the battery, and if the center pin is made of a hard metal, the strength of the battery is ensured and deformation is suppressed. Further, the center pin made of metal has high processing accuracy and is not easily deformed by heat or pressure even after being processed into the shape of the center pin, so that the predetermined shape is maintained during insertion. Therefore, when inserting the center pin into the center gap, the center pin is not caught on the separator, and the frequency of occurrence of incorrect insertion of the center pin is suppressed. Furthermore, the center pin is heavier than a center pin made of synthetic resin or the like, and is inserted into the electrode winding core by falling under its own weight. Therefore, pressurization when inserting the center pin is almost unnecessary, and the operation of inserting the center pin is simplified.
【００１９】[0019]
【実施例】以下に、本発明の好適な実施例について実験
結果に基づいて説明する。EXAMPLES Preferred examples of the present invention will be described below based on experimental results.
【００２０】実施例１
図１は本実施例の非水電解液二次電池の概略的な縦断面
を示すものであり、この電池を以下のようにして作成し
た。Example 1 FIG. 1 shows a schematic longitudinal section of a non-aqueous electrolyte secondary battery of this example, and this battery was produced as follows.
【００２１】まず、負極１は次のようにして作製した。
出発原料として石油ピッチを用い、これを焼成して粗粒
状のピッチコークスを得た。この粗粒状のピッチコーク
スを粉砕し、平均粒径４０μｍの粉末とし、続いて、こ
の粉末を不活性ガス中、１０００℃にて再焼成して不純
物を除去し、コークス材料粉末を得た。このようにして
得たコークス材料粉末を負極活物質担持体とし、このコ
ークス材料粉末を９０重量部、結着材としてポリフッ化
ビニリデン（ＰＶＤＦ）１０重量部とを混合し、負極合
剤を調製した。この負極合剤を、溶剤であるＮ−メチル
−２−ピロリドンに分散させてスラリー（ペースト状）
にした。次に、この負極合剤スラリーを厚さ１０μｍの
帯状の銅箔である負極集電体の両面に塗布し、溶剤を乾
燥後、ローラープレス機により圧縮成型して帯状負極１
を得た。なお、成型後の負極合剤の膜厚は両面共に１０
５μｍで同一であり、帯状の負極の幅は４１．５ｍｍ、
長さは６３５ｍｍとした。[0021] First, negative electrode 1 was produced as follows. Petroleum pitch was used as a starting material and was calcined to obtain coarse pitch coke. This coarse pitch coke was pulverized to obtain a powder with an average particle size of 40 μm, and then this powder was re-fired at 1000° C. in an inert gas to remove impurities to obtain a coke material powder. The coke material powder thus obtained was used as a negative electrode active material carrier, and 90 parts by weight of this coke material powder and 10 parts by weight of polyvinylidene fluoride (PVDF) as a binder were mixed to prepare a negative electrode mixture. . This negative electrode mixture is dispersed in the solvent N-methyl-2-pyrrolidone to form a slurry (paste).
I made it. Next, this negative electrode mixture slurry was applied to both sides of a negative electrode current collector, which is a strip-shaped copper foil with a thickness of 10 μm, and after drying the solvent, compression molding was performed using a roller press machine to form a strip-shaped negative electrode 1.
I got it. The film thickness of the negative electrode mixture after molding is 10 mm on both sides.
The width of the strip-shaped negative electrode is 41.5 mm,
The length was 635 mm.
【００２２】次に、正極２は次のようにして作製した。
炭酸リチウム０．５モルと炭酸コバルト１モルとを混合
して９００℃の空気中で５時間焼成することによってＬ
ｉＣｏＯ２ を得た。このＬｉＣｏＯ２ を正極活物質
とし、このＬｉＣｏＯ２ ９１重量部、導電剤としての
グラファイト６重量部と結着剤としてのポリフッ化ビニ
リデン３重量部と混合し、正極合剤とした。この正極合
剤を溶剤Ｎ−メチルピロリドンに分散させてスラリー（
ペースト状）にした。そして、この正極合剤を、厚さ２
０μｍの帯状のアルミニウム箔である正極集電体の両面
に均一に塗布して乾燥し、この乾燥後に圧縮成型して帯
状正極２を得た。なお、成型後の合剤膜厚は両面共に８
０μｍで同一であり、帯状正極の幅は３９．５ｍｍ、長
さは６０５ｍｍとした。Next, the positive electrode 2 was manufactured as follows. By mixing 0.5 mole of lithium carbonate and 1 mole of cobalt carbonate and calcining the mixture in air at 900°C for 5 hours, L
iCoO2 was obtained. This LiCoO2 was used as a positive electrode active material, and 91 parts by weight of this LiCoO2, 6 parts by weight of graphite as a conductive agent, and 3 parts by weight of polyvinylidene fluoride as a binder were mixed to form a positive electrode mixture. This positive electrode mixture was dispersed in the solvent N-methylpyrrolidone to form a slurry (
paste). Then, apply this positive electrode mixture to a thickness of 2
It was uniformly coated on both sides of a positive electrode current collector, which is a strip-shaped aluminum foil of 0 μm, and dried. After drying, compression molding was performed to obtain a strip-shaped positive electrode 2. The thickness of the mixture film after molding is 8 on both sides.
The strip positive electrode had a width of 39.5 mm and a length of 605 mm.
【００２３】次に、厚さ２５μｍ、幅４４ｍｍの微多孔
性ポリプロピレンフィルムより成るセパレータ３を２枚
、直径４ｍｍのピンに２周巻いた後、上述のように作製
した帯状負極１と帯状正極２がセパレーターを介して対
向するように積層し、この積層電極体を渦巻状に多数回
巻回し、最外周セパレータ最終端部をテープで固定し、
渦巻式電極を作製した。なお、この渦巻式電極の、中心
部の中空部分の内径は３．６ｍｍ、外径は１９．７ｍｍ
であった。Next, two separators 3 made of a microporous polypropylene film with a thickness of 25 μm and a width of 44 mm were wound twice around a pin with a diameter of 4 mm, and then the strip-shaped negative electrode 1 and the strip-shaped positive electrode 2 produced as described above were wound. are stacked so that they face each other with a separator in between, and this stacked electrode body is wound spirally many times, and the final end of the outermost separator is fixed with tape.
A spiral electrode was fabricated. The inner diameter of the hollow part at the center of this spiral electrode is 3.6 mm, and the outer diameter is 19.7 mm.
Met.
【００２４】上述のように作製した渦巻式電極を、ニッ
ケルめっきを施した鉄製の電池缶５に収納した。また、
渦巻式電極上下両面には絶縁板４を配設し、負極および
正極の集電を行うためにアルミニウム製正極リードを正
極集電体から導出して電池蓋７に、ニッケル製負極リー
ド１１を負極集電体から導出して電池缶５に溶接した。
その後、電池缶５の中にプロピレンカーボネートとジエ
チルカーボネートとの等容量混合溶媒中にＬｉＰＦ６
を１モル／ｌの割合で溶解した非水電解液を４．９ｍｌ
を注入して、渦巻式電極に含浸させた。The spiral electrode produced as described above was housed in a nickel-plated iron battery can 5. Also,
Insulating plates 4 are arranged on both the upper and lower sides of the spiral electrode, and in order to collect current from the negative and positive electrodes, an aluminum positive electrode lead is led out from the positive electrode current collector and attached to the battery lid 7, and a nickel negative electrode lead 11 is connected to the negative electrode. It was led out from the current collector and welded to the battery can 5. After that, LiPF6 was placed in a mixed solvent of equal volume of propylene carbonate and diethyl carbonate in the battery can 5.
4.9 ml of a non-aqueous electrolyte dissolved at a ratio of 1 mol/l
was injected to impregnate the spiral electrode.
【００２５】このようにして電解液を注入した後、図２
に示す外径３．５ｍｍ、内径２．５ｍｍ、長さ４０ｍｍ
のステンレス（ＳＵＳ３０４）製テーパー付き中空セン
ターピン８を図３に示す挿入装置を渦巻式電極３３巻芯
空隙部に用いて、先ず、上記センターピン８をピンガイ
ド３１を通過させて垂直に電極中空部３４に落下させ、
挿入棒３２を用いて電極中空部３４に完全に挿入した。
なお、このセンターピン８の重量は１．３７ｇであった
。After injecting the electrolyte in this way, FIG.
Outer diameter 3.5mm, inner diameter 2.5mm, length 40mm as shown in
A tapered hollow center pin 8 made of stainless steel (SUS304) is inserted into the core gap of the spiral electrode 33 using the insertion device shown in FIG. part 34,
The electrode was completely inserted into the hollow part 34 using the insertion rod 32. Note that the weight of this center pin 8 was 1.37 g.
【００２６】アスファルトで表面を塗布した絶縁封口ガ
スケットを介して電池缶５をかしめることにより、電池
蓋７を固定し、電池内の機密性を保持させた。以上のよ
うな構成で、図１に示すような直径２０．５ｍｍ、高さ
５０ｍｍの円筒型非水電解液電池（実施例電池１）を作
成した。By caulking the battery can 5 through an insulating sealing gasket whose surface was coated with asphalt, the battery lid 7 was fixed and the airtightness inside the battery was maintained. With the above configuration, a cylindrical nonaqueous electrolyte battery (Example Battery 1) having a diameter of 20.5 mm and a height of 50 mm as shown in FIG. 1 was created.
【００２７】実施例２
挿入するセンターピンが外径３．５ｍｍ、内径２．５ｍ
ｍ、長さ４０ｍｍのステンレス（ＳＵＳ３０４）製中空
のもので、かつ図４に示すように最大幅１ｍｍの隙間８
ａが入っているものを用いた以外は実施例１と同様にし
て、円筒型非水電解液電池（実施例電池２）を作製した
。なお、このセンターピンの重量は１．３０ｇであった
。Example 2 The center pin to be inserted has an outer diameter of 3.5 mm and an inner diameter of 2.5 m.
m, hollow made of stainless steel (SUS304) with a length of 40 mm, and a gap 8 with a maximum width of 1 mm as shown in Figure 4.
A cylindrical non-aqueous electrolyte battery (Example Battery 2) was produced in the same manner as in Example 1 except that a battery containing a was used. Note that the weight of this center pin was 1.30 g.
【００２８】比較例１
挿入するセンターピンに外径３．５ｍｍ、内径２．５ｍ
ｍ、長さ４０ｍｍのポリプロピレン製中空センターピン
を用いた以外は実施例１と同様にして、円筒型非水電解
液電池（比較例電池１）を作成した。なお、このセンタ
ーピンの重量は０．１６ｇであった。Comparative Example 1 The center pin to be inserted has an outer diameter of 3.5 mm and an inner diameter of 2.5 m.
A cylindrical non-aqueous electrolyte battery (Comparative Example Battery 1) was produced in the same manner as in Example 1 except that a polypropylene hollow center pin having a length of 40 mm and a length of 40 mm was used. Note that the weight of this center pin was 0.16 g.
【００２９】このようにして作成された実施例電池１，
実施例電池２および比較例電池１について、電極中心部
へのセンターピン挿入時の不良率について検討を行った
。その結果を表１に示す。Example battery 1 prepared in this way,
Regarding Example Battery 2 and Comparative Example Battery 1, a study was conducted on the defective rate when the center pin was inserted into the center of the electrode. The results are shown in Table 1.
【表１】[Table 1]
【００３０】表１からわかるように、実施例電池１およ
び実施例電池２においては、センターピン挿入時の不良
率が低く、良好な挿入性を示すのに対し、比較例電池１
では、センターピンがセパレータに引っ掛かることによ
る挿入不良が発生し、十分な挿入性が得られない。した
がって、これらの結果から、非水電解液二次電池におい
て、センターピンを金属により構成することは、センタ
ーピンの挿入不良を低減するうえで有効であることが示
された。As can be seen from Table 1, Example Battery 1 and Example Battery 2 had a low defect rate when inserting the center pin and exhibited good insertability, whereas Comparative Example Battery 1
In this case, insertion failure occurs due to the center pin getting caught on the separator, and sufficient insertability cannot be obtained. Therefore, these results indicate that in a non-aqueous electrolyte secondary battery, forming the center pin from metal is effective in reducing insertion failure of the center pin.
【００３１】また、ここで、ポリプロピレン製のセンタ
ーピンを使用する比較例電池１においては、センターピ
ンが０．１６ｇと軽量であるため、中心空隙部に自重で
落下せず挿入に際して加圧が必要であったが、ステンレ
ス製のセンターピンを使用する実施例電池１および実施
例電池２では、センターピンがいずれも約１．３ｇと重
いため、電極巻芯部に自重で落下し、加圧はほとんど不
要であった。したがって、このことから、センターピン
として金属製のものを使用すれば、センターピン挿入時
の加圧工程を省くことができ、電池の製造操作を簡易化
することが可能となることが示された。In addition, in Comparative Example Battery 1, which uses a center pin made of polypropylene, the center pin is lightweight at 0.16 g, so it does not fall into the center gap under its own weight and requires pressure when inserted. However, in Example Battery 1 and Example Battery 2, which use stainless steel center pins, the center pins are both heavy at about 1.3 g, so they fall onto the electrode winding core under their own weight, and the pressurization is not possible. It was almost unnecessary. Therefore, this shows that if a metal center pin is used, the pressurizing process when inserting the center pin can be omitted, and the battery manufacturing operation can be simplified. .
【００３２】次に、実施例電池１，実施例電池２および
比較例電池１について、それぞれ外部加圧に対する強度
について検討を行った。Next, the strength of Example Battery 1, Example Battery 2, and Comparative Example Battery 1 against external pressure was examined.
【００３３】なお、外部加圧に対する各電池の強度の検
討を行うために、先ず、図５に示すような金属平板５２
，５３が対向して設けられてなる加圧装置を用い、この
金属平板５２，５３間に、試料となる電池５１を挟み込
み、この電池５１を挟みこむ方向（図中矢印Ｐ方向）に
油圧プレスによって０．５ｔｏｎの加圧を行った。そし
て、加圧方向の電池高さを測定することによって電池の
強度を評価した。加圧後における電池の高さ及び加圧に
よる高さの変化量（加圧前電池高さ−加圧後電池高さ）
を表２に示す。In order to examine the strength of each battery against external pressure, first, a metal flat plate 52 as shown in FIG.
, 53 facing each other, a battery 51 as a sample is sandwiched between the metal plates 52 and 53, and a hydraulic press is applied in the direction of sandwiching the battery 51 (in the direction of arrow P in the figure). A pressure of 0.5 ton was applied. Then, the strength of the battery was evaluated by measuring the height of the battery in the pressurizing direction. Battery height after pressurization and height change due to pressurization (battery height before pressurization - battery height after pressurization)
are shown in Table 2.
【表２】[Table 2]
【００３４】表２に示したように、ポリプロピレン製セ
ンターピンを用いた比較例電池１では、加圧による高さ
変化量が１．７ｍｍと大きいのに対し、ステンレス製セ
ンターピンを用いた実施例電池１および実施例電池２に
おいては、高さ変化量はいずれも比較例電池１の約１／
２程度であり、ほとんど変形が生じていないAs shown in Table 2, in Comparative Example Battery 1 using a center pin made of polypropylene, the amount of change in height due to pressurization was as large as 1.7 mm, whereas in Example Battery 1 using a center pin made of stainless steel. In both Battery 1 and Example Battery 2, the amount of height change is about 1/1 of that in Comparative Example Battery 1.
2, with almost no deformation occurring.
【００３５
】したがって、このことから、金属製のセンターピンを
使用することは、電池の強度を上げる上で有効であり、
これにより、封口部等が変形することによる電解液の漏
れを防止でき、安全性の向上が図れることがわかった。
また、このとき、実施例電池１および実施例電池２にお
いて同程度の強度が得られたことから、センターピンの
外周に１割以下の隙間が存在していても電池強度が影響
されないことが示され、センターピンの加工を容易なも
のとすることが可能であることがわかった。0035
] Therefore, from this, using a metal center pin is effective in increasing the strength of the battery.
It has been found that this makes it possible to prevent electrolyte leakage due to deformation of the sealing part and the like, thereby improving safety. In addition, at this time, similar strengths were obtained for Example Battery 1 and Example Battery 2, indicating that the battery strength is not affected even if there is a gap of 10% or less around the outer periphery of the center pin. It was found that it is possible to easily process the center pin.
【００３６】[0036]
【発明の効果】以上の説明からも明らかなように、本発
明においては、収納缶内に渦巻式電極と該渦巻式電極の
巻芯に配設された金属性の中空筒状のセンターピンとを
収納してなる非水電解液二次電池において、上記センタ
ーピンを金属により構成しているので、センターピンを
電極巻芯部に挿入する際の挿入不良率が低減できるとと
もに電池の製造工程数を減少させることができ、電池の
生産性を向上させることが可能となる。また、強度も大
きくなるので、外部から高圧が加えられた場合の変形、
電解液の漏れ等が防止され、高い安全性が確保できる。Effects of the Invention As is clear from the above description, in the present invention, a spiral electrode and a metallic hollow cylindrical center pin disposed on the winding core of the spiral electrode are installed in a storage can. In the nonaqueous electrolyte secondary battery that is housed, the center pin is made of metal, which reduces the insertion failure rate when inserting the center pin into the electrode winding core, and reduces the number of battery manufacturing steps. This makes it possible to improve battery productivity. It also has greater strength, so it will not deform when high pressure is applied from the outside.
Leakage of electrolyte is prevented and high safety can be ensured.
【図１】本発明の非水電解液二次電池の一例を示す概略
的な縦断面図である。FIG. 1 is a schematic vertical cross-sectional view showing an example of a non-aqueous electrolyte secondary battery of the present invention.
【図２】センターピンの一例を示す斜視図である。FIG. 2 is a perspective view showing an example of a center pin.
【図３】センターピンの電極巻芯部への挿入工程を示す
模式図である。FIG. 3 is a schematic diagram showing the process of inserting the center pin into the electrode winding core.
【図４】上記センターピンの他の例を示す斜視図である
。FIG. 4 is a perspective view showing another example of the center pin.
【図５】電池の加圧に対する強度を測定するために使用
した加圧装置を示す模式図である。FIG. 5 is a schematic diagram showing a pressurizing device used to measure the strength of a battery against pressurization.
１・・・負極 ２・・・正極 ３・・・セパレータ ４・・・絶縁板 ５・・・電池缶 ６・・・封口ガスケット ７・・・電池蓋 ９・・・負極集電体 １０・・・正極集電体 １１・・・負極リード １２・・・正極リード 1...Negative electrode 2...Positive electrode 3...Separator 4...Insulating board 5...Battery can 6... Sealing gasket 7...Battery cover 9... Negative electrode current collector 10... Positive electrode current collector 11... Negative lead 12...Positive lead
Claims (1)
タを介して渦巻き状に積層巻回されてなる巻回体と、該
巻回体の中心空隙部に配設された中空筒状のセンターピ
ンとを収納してなる非水電解液二次電池において、上記
センターピンが金属より構成されていることを特徴とす
る非水電解液二次電池。Claim 1: A wound body in which a negative electrode and a positive electrode are laminated and wound in a spiral manner with a separator in between, and a hollow cylindrical body disposed in a central gap of the wound body, in a storage can. 1. A non-aqueous electrolyte secondary battery containing a center pin, wherein the center pin is made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03130686A JP3143951B2 (en) | 1991-05-02 | 1991-05-02 | Non-aqueous electrolyte secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03130686A JP3143951B2 (en) | 1991-05-02 | 1991-05-02 | Non-aqueous electrolyte secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04332481A true JPH04332481A (en) | 1992-11-19 |
| JP3143951B2 JP3143951B2 (en) | 2001-03-07 |
Family
ID=15040198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03130686A Expired - Lifetime JP3143951B2 (en) | 1991-05-02 | 1991-05-02 | Non-aqueous electrolyte secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3143951B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06168711A (en) * | 1992-11-27 | 1994-06-14 | Toshiba Battery Co Ltd | Nonaqueous electrolyte battery |
| WO1996023324A1 (en) * | 1995-01-27 | 1996-08-01 | Asahi Kasei Kogyo Kabushiki Kaisha | Nonaqueous battery |
| JP2003059539A (en) * | 2001-08-22 | 2003-02-28 | Shin Kobe Electric Mach Co Ltd | Cylindrical lithium ion battery |
| JP2003308873A (en) * | 2002-04-17 | 2003-10-31 | Sony Corp | Nonaqueous electrolyte secondary battery |
| US6811920B2 (en) | 2002-04-19 | 2004-11-02 | Matsushita Electric Industrial Co., Ltd. | Cylindrical lithium ion secondary battery and fabrication method thereof |
| US6869725B2 (en) | 2001-11-28 | 2005-03-22 | Sanyo Electric Co., Ltd. | Sealed battery |
| JP2006004792A (en) * | 2004-06-18 | 2006-01-05 | Hitachi Maxell Ltd | Nonaqueous secondary battery |
| EP1717878A1 (en) * | 2005-04-27 | 2006-11-02 | Samsung SDI Co., Ltd. | Core member for a cylindrical lithium secondary battery |
| JP2006313737A (en) * | 2005-04-04 | 2006-11-16 | Matsushita Electric Ind Co Ltd | Cylindrical lithium secondary battery |
| EP1724855A1 (en) * | 2005-05-18 | 2006-11-22 | Samsung SDI Co., Ltd. | Deformable core for a cylindrical lithium secondary battery |
| US7972717B2 (en) | 2006-01-13 | 2011-07-05 | Sony Corporation | Battery |
| US8211561B2 (en) | 2008-04-04 | 2012-07-03 | Toyota Jidosha Kabushiki Kaisha | Winding type battery and method for manufacturing the winding type battery |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3833056B2 (en) | 2000-08-07 | 2006-10-11 | 旭化成ケミカルズ株式会社 | Flame retardant aromatic polycarbonate resin composition |
-
1991
- 1991-05-02 JP JP03130686A patent/JP3143951B2/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06168711A (en) * | 1992-11-27 | 1994-06-14 | Toshiba Battery Co Ltd | Nonaqueous electrolyte battery |
| WO1996023324A1 (en) * | 1995-01-27 | 1996-08-01 | Asahi Kasei Kogyo Kabushiki Kaisha | Nonaqueous battery |
| US5925482A (en) * | 1995-01-27 | 1999-07-20 | Asahi Kasei Kogyo Kabushiki Kaisha | Non-aqueous battery |
| JP2003059539A (en) * | 2001-08-22 | 2003-02-28 | Shin Kobe Electric Mach Co Ltd | Cylindrical lithium ion battery |
| JP4631234B2 (en) * | 2001-08-22 | 2011-02-16 | 新神戸電機株式会社 | Cylindrical lithium-ion battery |
| US6869725B2 (en) | 2001-11-28 | 2005-03-22 | Sanyo Electric Co., Ltd. | Sealed battery |
| JP2003308873A (en) * | 2002-04-17 | 2003-10-31 | Sony Corp | Nonaqueous electrolyte secondary battery |
| US6811920B2 (en) | 2002-04-19 | 2004-11-02 | Matsushita Electric Industrial Co., Ltd. | Cylindrical lithium ion secondary battery and fabrication method thereof |
| JP2006004792A (en) * | 2004-06-18 | 2006-01-05 | Hitachi Maxell Ltd | Nonaqueous secondary battery |
| JP2006313737A (en) * | 2005-04-04 | 2006-11-16 | Matsushita Electric Ind Co Ltd | Cylindrical lithium secondary battery |
| EP1717878A1 (en) * | 2005-04-27 | 2006-11-02 | Samsung SDI Co., Ltd. | Core member for a cylindrical lithium secondary battery |
| US7655349B2 (en) | 2005-04-27 | 2010-02-02 | Samsung Sdi Co., Ltd. | Cylindrical lithium secondary battery |
| JP2006310301A (en) * | 2005-04-27 | 2006-11-09 | Samsung Sdi Co Ltd | Cylindrical lithium secondary battery |
| EP1724855A1 (en) * | 2005-05-18 | 2006-11-22 | Samsung SDI Co., Ltd. | Deformable core for a cylindrical lithium secondary battery |
| US7955730B2 (en) | 2005-05-18 | 2011-06-07 | Samsung Sdi Co., Ltd. | Secondary battery |
| US7972717B2 (en) | 2006-01-13 | 2011-07-05 | Sony Corporation | Battery |
| US8211561B2 (en) | 2008-04-04 | 2012-07-03 | Toyota Jidosha Kabushiki Kaisha | Winding type battery and method for manufacturing the winding type battery |
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