JPH02170356A - Cylindrical nonaqueous electrolyte cell - Google Patents
Cylindrical nonaqueous electrolyte cellInfo
- Publication number
- JPH02170356A JPH02170356A JP32343288A JP32343288A JPH02170356A JP H02170356 A JPH02170356 A JP H02170356A JP 32343288 A JP32343288 A JP 32343288A JP 32343288 A JP32343288 A JP 32343288A JP H02170356 A JPH02170356 A JP H02170356A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- negative electrode
- electrode plate
- lithium
- aqueous electrolyte
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011255 nonaqueous electrolyte Substances 0.000 title claims abstract description 22
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 7
- 239000011149 active material Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 34
- 229910052744 lithium Inorganic materials 0.000 abstract description 33
- 238000004804 winding Methods 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract 1
- 208000028659 discharge Diseases 0.000 description 22
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 10
- -1 polypropylene Polymers 0.000 description 10
- 239000004743 Polypropylene Substances 0.000 description 8
- 229920001155 polypropylene Polymers 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000013467 fragmentation Methods 0.000 description 5
- 238000006062 fragmentation reaction Methods 0.000 description 5
- 230000002950 deficient Effects 0.000 description 4
- XTHFKEDIFFGKHM-UHFFFAOYSA-N ethylene glycol dimethyl ether Natural products COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000003792 electrolyte Substances 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
- 239000007773 negative electrode material Substances 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
- 230000002787 reinforcement Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920013683 Celanese Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/06—Electrodes for primary cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/381—Alkaline or alkaline earth metals elements
- H01M4/382—Lithium
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Primary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は円筒形非水電解液電池に関し、さらに詳しくは
、放電容量が大きく、放電特性が優れた、渦巻状電極群
を備えた円筒形非水電解液電池に関する。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a cylindrical non-aqueous electrolyte battery, and more specifically, a spiral electrode group having a large discharge capacity and excellent discharge characteristics. The present invention relates to a cylindrical non-aqueous electrolyte battery.
（従来の技術）
従来、この種の円筒形非水電解液電池に用いる渦巻状電
極群は、金属導電基板上に活物質を担持した正極板と、
リチウム等の金属からなる負極板とをセパレータを介し
て渦巻状に巻回して形成されている。そして、負極板と
して金属リチウムそのものを用いているので、負極の集
電に際しては、任意形状の負極集電体を負極の任意の部
分に配設し、それを負極端子に接続することにより行な
うことができる。(Prior Art) Conventionally, a spiral electrode group used in this type of cylindrical non-aqueous electrolyte battery consists of a positive electrode plate supporting an active material on a metal conductive substrate,
It is formed by spirally winding a negative electrode plate made of metal such as lithium with a separator in between. Since metallic lithium itself is used as the negative electrode plate, current collection from the negative electrode can be done by placing a negative electrode current collector of any shape on any part of the negative electrode and connecting it to the negative electrode terminal. Can be done.
電池の内部短絡を抑制する必要があること、及びリチウ
ム自身が導電性に富むことを考慮すると、通常、集電体
は負極板の終端部に着設される。Considering that it is necessary to suppress internal short circuits in the battery and that lithium itself is highly conductive, the current collector is usually attached to the terminal end of the negative electrode plate.
かかる構成を有する渦巻状電極群を備えた円筒形非水電
解液電池としては、例えば、前記負極板の巻回終端部に
電極群の外周を覆うとともに負極集電体を兼ねる金属薄
板を着設したものがある（特開昭６２−３５４６０号公
報）。A cylindrical non-aqueous electrolyte battery having a spiral electrode group having such a configuration may be manufactured by, for example, attaching a thin metal plate to the winding end of the negative electrode plate to cover the outer periphery of the electrode group and also to serve as a negative electrode current collector. (Japanese Patent Application Laid-Open No. 62-35460).
通常用いられている渦巻状電極群を備えた円筒形電池に
ついて、第３図及び第５図を参考にして説明する。A commonly used cylindrical battery equipped with a spiral electrode group will be described with reference to FIGS. 3 and 5.
まず、第３図において、■は長尺状の金属リチウムから
なる負極板であり、その一端に２で示される金属薄板（
集電体）が圧着等の手段により着設されている。First, in Fig. 3, ■ is a long negative electrode plate made of metallic lithium, and one end of it is a thin metal plate (2) (
A current collector) is attached by means such as crimping.
次に、第５図において電池の構成を説明する。Next, the structure of the battery will be explained with reference to FIG.
ｌは負極板であり、上記したように金属薄板２が着設さ
れている構成を有する。1 is a negative electrode plate, and has a structure in which the thin metal plate 2 is attached as described above.
３は正極板であり、長尺状のステンレス製ラスメタル等
の網状導電基材（３ａ）に、例えば、二酸化マンガンの
ような金属酸化物やフッ化炭素のようなハロゲン化合物
等の正極活物質と導電材、結着剤等からなる正極合剤（
３ｂ）を担持させて構成されている。3 is a positive electrode plate, in which a positive electrode active material such as a metal oxide such as manganese dioxide or a halogen compound such as carbon fluoride is coated on a reticular conductive base material (3a) such as a long stainless steel lath metal. Positive electrode mixture consisting of conductive material, binder, etc.
3b).
また、４はセパレータであり、例えばポリプロピレン製
の長尺状微孔性樹脂フィルムに、非水電解液、例えばプ
ロピレンカーボネート、１．２−メトキシエタンのよう
な非水溶媒に、過塩素酸リチウムのような電解質を溶解
した非水電解液を含浸させである。Further, 4 is a separator, for example, a long microporous resin film made of polypropylene, a non-aqueous electrolyte, such as a non-aqueous solvent such as propylene carbonate or 1,2-methoxyethane, and lithium perchlorate. It is impregnated with a non-aqueous electrolyte solution containing such an electrolyte.
５は集電棒であり、前記正極板の端部に接続固定されて
いる。Reference numeral 5 denotes a current collector rod, which is connected and fixed to the end of the positive electrode plate.
負極板１に、セパレータ４を介して正極板３を対峙させ
て載置し、さらにその上にセパレータ４を載置したもの
を、集電棒５を巻回中心として、負極板１が外側となり
、さらに最外周が金属薄板２で覆われるように巻回して
、渦巻状電極群が構成される。The positive electrode plate 3 is placed on the negative electrode plate 1 facing each other with a separator 4 in between, and the separator 4 is further placed on top of the positive electrode plate 3, and the current collector rod 5 is wound around the current collecting rod 5, with the negative electrode plate 1 being on the outside. The spiral electrode group is further wound so that the outermost periphery is covered with the metal thin plate 2.
上記渦巻状電極群は、前記金属薄板２と電池容器内壁と
が密着するように、底部に絶縁板を配置した電池容器に
収納されている。The spiral electrode group is housed in a battery container with an insulating plate disposed at the bottom so that the thin metal plate 2 and the inner wall of the battery container are in close contact with each other.
電池容器に収納された渦巻状電極群の上に、絶縁板、次
いで中央に正極端子板を嵌合した封口体を載置し、容器
開口部の縁を内側へ湾曲させることにより全体が封口さ
れ、電池が形成される。An insulating plate and then a sealing body fitted with a positive terminal plate in the center are placed on top of the spiral electrode group housed in the battery container, and the entire container is sealed by curving the edge of the container opening inward. , a battery is formed.
（発明が解決しようとする課題）
ところが、上記構成のものにあっては、次のような問題
がある。すなわち、第１には、負極板の大部分が金属リ
チウムで構成されているため、機械的強度が不足すると
いう問題である。すなわち、リチウム薄板の終端部に金
属薄板を着設すると、着設操作により、着設部近傍が他
のリチウム部分よりも延ばされて薄くなり、負極板の強
度の低下が生じ、電池製造時、特に渦巻状電極巻回末期
工程において負極板が変形したり、破損したりする原因
となる。(Problems to be Solved by the Invention) However, the above configuration has the following problems. That is, firstly, since most of the negative electrode plate is composed of metallic lithium, there is a problem that mechanical strength is insufficient. In other words, when a thin metal plate is attached to the terminal end of a thin lithium plate, the area near the attachment part is stretched and thinner than other lithium parts due to the attachment operation, resulting in a decrease in the strength of the negative electrode plate, which causes problems during battery manufacturing. This may cause deformation or damage to the negative electrode plate, especially in the final stage of winding the spiral electrode.
また、第２には、金属薄板着設部近傍における金属リチ
ウムの消耗が大きいために、リチウムの分断が生じやす
いという問題である。負極活物質である金属リチウムは
放電反応に伴い消耗していくので、負極板の厚みは放電
反応が進むに伴い薄くなっていく、特に、金属薄板着設
部近傍では、活性なリチウム面が露出しているうえ、電
流が集中する部分であるため、金属リチウムの消耗は比
較的大きなものとなり、放電末期にはリチウムの分断が
生じることになる。The second problem is that lithium metal tends to be fragmented because the metal lithium is consumed in the vicinity of the thin metal plate attachment portion. Metallic lithium, which is the negative electrode active material, is consumed as the discharge reaction progresses, so the thickness of the negative electrode plate becomes thinner as the discharge reaction progresses.Especially, the active lithium surface is exposed near the area where the metal thin plate is attached. In addition, since this is a part where current is concentrated, the consumption of metallic lithium is relatively large, and lithium fragmentation occurs at the end of discharge.
このように、金属リチウムに分断が生じると、その時点
で集電不能となり、未反応のリチウムが残存して放電容
量が低下してしまう。In this way, when metallic lithium is fragmented, it becomes impossible to collect current, and unreacted lithium remains, resulting in a decrease in discharge capacity.
本発明は、かかる問題点を解決して、放電容量が低下せ
ず、放電性能が優れた円筒形非水電解液電池を提供する
ことを目的とする。An object of the present invention is to solve these problems and provide a cylindrical non-aqueous electrolyte battery that does not have a reduced discharge capacity and has excellent discharge performance.
［発明の構成］
（課題を解決するための手段）
本発明者らは、上記問題点を解決するために鋭意検討を
重ねた結果、リチウム負極板と金属薄板との着設部を絶
縁性の物質で補強すれば、機械的強度も向上し、また、
放電反応における着設部近傍のリチウムの分断も防止で
きることを見出し、本発明に至った。[Structure of the Invention] (Means for Solving the Problems) As a result of intensive studies to solve the above problems, the present inventors have developed an insulating material for the attachment part between the lithium negative electrode plate and the metal thin plate. Reinforcement with materials improves mechanical strength, and
It was discovered that fragmentation of lithium in the vicinity of the attachment part during the discharge reaction can also be prevented, leading to the present invention.
すなわち、本発明の円筒形非水電解液電池は、長尺状の
金属導電基板上に活物質を担持した正極板と、一方の端
部に金属薄板を着設した長尺状の負極板とを、前記金属
薄板が最外周となるようにセパレータを介して渦巻状に
巻回した渦巻状電極群を備えた円筒形非水電解液電池に
おいて、該負極板の内周面側の金属薄板着設部に、負極
根面から金属薄板面にかかるように、電気絶縁性の補強
層を設けたことを特徴とする特
本発明の電池は、負極板と負極集電体である金属薄板と
の着設部分に補強層を設けたことに特徴を有し、その他
の要素は従来の渦巻状電極群を備えた円筒形非水電解液
電池と同じであってもよい。That is, the cylindrical non-aqueous electrolyte battery of the present invention includes a positive electrode plate having an active material supported on a long metal conductive substrate, and a long negative electrode plate having a thin metal plate attached to one end thereof. In a cylindrical nonaqueous electrolyte battery equipped with a spiral electrode group that is spirally wound with a separator in between so that the thin metal plate is the outermost periphery, the thin metal plate is attached to the inner peripheral surface of the negative electrode plate. The battery of the present invention is characterized in that an electrically insulating reinforcing layer is provided in the installation part so as to extend from the root surface of the negative electrode to the surface of the thin metal plate. It is characterized in that a reinforcing layer is provided at the mounting portion, and other elements may be the same as those of a conventional cylindrical non-aqueous electrolyte battery equipped with a spiral electrode group.
本発明にかかる補強層の素材としては、上記目的から明
らかな如（、まず電気絶縁性を有するものであることが
必要であるが、当該電池に用いる電解液が有機溶媒であ
ることから耐有機溶媒性の素材でなければならないこと
は言うまでもない。As is clear from the above purpose, the material for the reinforcing layer according to the present invention must first have electrical insulation properties, but since the electrolyte used in the battery is an organic solvent, it must be organic resistant. Needless to say, it must be a solvent-based material.
かかる要求に合致する素材としては、例えばポリエチレ
ンやポリプロピレン等のオレフィン系樹脂が好適である
。特に好ましくはポリプロピレンである。As a material meeting such requirements, for example, olefin resins such as polyethylene and polypropylene are suitable. Particularly preferred is polypropylene.
また、補強層の厚さは、０．０２〜０．２０ｍｍが好ま
しく、さらに好ましくは０．０４〜０．１０ｍｍ、特に
好ましくは０．０５〜０．０８ｍｍである。Moreover, the thickness of the reinforcing layer is preferably 0.02 to 0.20 mm, more preferably 0.04 to 0.10 mm, particularly preferably 0.05 to 0.08 mm.
上記補強層は、負極板の内周面側の金属薄板着設部にお
いて、負極板面から金属薄板面にかかるように設けられ
る。放電反応を抑制することなく、また金属薄板着設部
近傍の金属リチウムの消耗を抑制するという点からは、
金属薄板側端を中心として両側すなわち負極根側と金属
薄板側とに、それぞれ３〜８ｍｍの巾になるように設け
られるのが好ましい、さらに好ましくは両側にそれぞれ
４〜６ｎｕｎの巾である。The reinforcing layer is provided so as to extend from the negative electrode plate surface to the metal thin plate surface at the metal thin plate mounting portion on the inner peripheral surface side of the negative electrode plate. From the point of view of suppressing the consumption of metallic lithium near the attachment part of the metal thin plate without suppressing the discharge reaction,
It is preferable that they are provided on both sides, that is, on the negative electrode root side and on the metal thin plate side, with a width of 3 to 8 mm, and more preferably, a width of 4 to 6 mm on both sides, centering on the thin metal plate side end.
このような補強層の設置方法としては、例えば上記補強
層となる樹脂のシートを着設部に載置し熱圧着する方法
、耐有機溶媒性の接着剤を用いて着設部に接着する方法
等の周知既存の方法を用いることができる。Methods for installing such a reinforcing layer include, for example, a method in which a resin sheet serving as the reinforcing layer is placed on the attachment part and bonded with heat, or a method in which it is adhered to the attachment part using an organic solvent-resistant adhesive. Well-known existing methods such as can be used.
本発明の電池は、上記したような、金属薄板着設部に補
強層が形成された負極板を、前記の公知の正極板及びセ
パレータと組合せて、通常の方法で、これらの発電要素
を集電棒の回りに巻回して渦巻状電極群とし、これを電
池容器に収納し、密封することにより得られる。In the battery of the present invention, the above-described negative electrode plate having a reinforcing layer formed on the thin metal plate attachment part is combined with the above-mentioned known positive electrode plate and separator, and these power generation elements are assembled by a normal method. It is obtained by winding around an electric rod to form a spiral electrode group, storing this in a battery container, and sealing it.
（作用）
本発明の円筒形非水電解液電池は、負極板の巻回末端の
金属薄板との着設部に補強層を設けたので、負極板と金
属薄板との着設部の機械的強度が改善され、渦巻状電極
群製造時の巻回末期における負極板の変形や破損を抑制
することができる。(Function) In the cylindrical non-aqueous electrolyte battery of the present invention, a reinforcing layer is provided at the end of the winding of the negative electrode plate where it is attached to the thin metal plate. The strength is improved, and deformation and breakage of the negative electrode plate at the final stage of winding during manufacturing of the spiral electrode group can be suppressed.
さらに、活性なリチウム面が露出した、すなわち他のリ
チウム部分より消耗速度が速い着設部近傍は、補強層に
より正極側と電気的に絶縁されるので、反応による金属
リチウムの消耗は、微小なものとなり、放電末期におけ
る金属リチウムの分断を抑制できる。Furthermore, the vicinity of the attachment part where the active lithium surface is exposed, i.e. where the consumption rate is faster than other lithium parts, is electrically insulated from the positive electrode side by the reinforcing layer, so the consumption of metallic lithium due to reactions is minimal. This makes it possible to suppress fragmentation of metallic lithium at the final stage of discharge.
（発明の実施例）
以下、本発明を円筒形二酸化マンガン／リチウム電池に
適用した実施例に基づいて説明する。(Embodiments of the Invention) Hereinafter, the present invention will be explained based on an embodiment in which the present invention is applied to a cylindrical manganese dioxide/lithium battery.
実施例
負極活物質である長さ２４０ ｍｍ、幅２３ｍｍ、厚さ
０．１６ｍｍの金属リチウム板（負極板）１の端部に、
長さ７０ｍｍ、幅２３ｍｍ、厚さ０．０３ｍｍの５ＵＳ
３０４ステンレス製金属薄板２を重ねてプレス型上下よ
り押圧して圧着により着設した。この着設端を中心とし
、リチウム側及び金属薄板側にそれぞれ５ＩＩＩ！１１
の幅となるように、ポリプロピレン製の長さ１０關、幅
２３１１ＩＩ＋、厚さ０．０６ｍｍの絶縁テープの片面
にシリコンゴム接着剤が塗布された補強層６を、接着剤
面がリチウムと金属薄板とに接着するようにして設けた
。Example At the end of a metal lithium plate (negative electrode plate) 1, which is a negative electrode active material and has a length of 240 mm, a width of 23 mm, and a thickness of 0.16 mm,
5US with length 70mm, width 23mm, thickness 0.03mm
The thin metal plates 2 made of 304 stainless steel were stacked and pressed from above and below the press mold to be attached by pressure bonding. Centering on this mounting end, 5III! on the lithium side and the metal thin plate side, respectively. 11
A reinforcing layer 6 made of polypropylene with a length of 10 mm, a width of 2311 II+, and a thickness of 0.06 mm is coated with a silicone rubber adhesive on one side so that the adhesive side is lithium and a thin metal plate. It was attached so that it could be glued to.
次に、長さ２３０ｍｍ、幅２６＋ｎｍ、厚さ０．１５ｒ
ａｍのＳＵＳステンレス製ラスメタル網体からなる長尺
状の導電基材（３ａ）上に、二酸化マンガン及び黒鉛を
重量比で９２＝８の割合で混合したもの１００重量部に
対してポリテトラフルオロエチレンを３重量部混合し、
これにさらに蒸留水１１８重量部を加えて得たペースト
状の正極合剤（３ｂ）を塗布し、１００℃の熱風で１０
分間乾燥させた後、圧延ローラブレスにより０．４５ｍ
ｍの厚さとなるようにして、正極板３を製造した。Next, length 230mm, width 26+nm, thickness 0.15r
Polytetrafluoroethylene is applied to 100 parts by weight of a mixture of manganese dioxide and graphite in a weight ratio of 92=8 on a long conductive base material (3a) made of am SUS stainless steel lath metal network. Mix 3 parts by weight of
A paste-like positive electrode mixture (3b) obtained by further adding 118 parts by weight of distilled water was applied, and the mixture was heated with hot air at 100°C for 10 minutes.
After drying for 0.45 m by rolling roller press.
A positive electrode plate 3 was manufactured to have a thickness of m.
この正極板の端部に、長さ３１．５ｍｍ、径１ｍｍの５
ＵＳ３０４ステンレス製正極集電捧５を、スポット溶接
により接続固定した。At the end of this positive electrode plate, attach a 5.
A positive electrode current collector 5 made of US304 stainless steel was connected and fixed by spot welding.
上記負極板１、ポリプロピレン製微孔性樹脂フィルム（
ジュラガード２４００、セラニーズ■製）からなる長さ
４８０＋ｎｍ、幅２９ｍｒｎ、厚さ０．０２５ｍｍの帯
状のセパレータ４、上記正極板及び前記と同一のセパレ
ータ４をこの順に載置し、負極ＩＮＩが外側となるよう
にして正極集電棒５の周囲に巻回して、第４図に示す外
周が前記金属薄板２で覆われた渦巻状電極群を製造した
。The above negative electrode plate 1, polypropylene microporous resin film (
A strip-shaped separator 4 of length 480+nm, width 29mrn, and thickness 0.025mm made of Duraguard 2400 (manufactured by Celanese ■), the above positive electrode plate, and the same separator 4 as above were placed in this order, and the negative electrode INI was placed on the outside. The spiral electrode group was wound around the positive electrode current collector rod 5 in this manner to produce a spiral electrode group whose outer periphery was covered with the thin metal plate 2 as shown in FIG.
なお、前記セパレータ４には、プロピレンカーボネート
と１，２−ジメトキシエタンとを体積比１：１で混合し
た混合液に過塩素酸リチウムを０．５モル／Ｉ２の濃度
に溶解した電解液を予め含浸しておいた。Note that the separator 4 is preliminarily filled with an electrolytic solution in which lithium perchlorate is dissolved at a concentration of 0.5 mol/I2 in a mixture of propylene carbonate and 1,2-dimethoxyethane at a volume ratio of 1:1. It was impregnated.
次いで、上記渦巻状電極群を、底部にポリプロピレン製
の絶縁板を配置した円筒形電池容器の中に収納し、前記
金属薄板２と容器内壁とを密着させた。この電池容器は
、負極端子を兼ねる有底円筒状の容器で、鉄鋼板を絞り
加工したものからなっている。Next, the spiral electrode group was housed in a cylindrical battery container with an insulating plate made of polypropylene disposed at the bottom, and the thin metal plate 2 and the inner wall of the container were brought into close contact. This battery container is a cylindrical container with a bottom that also serves as a negative electrode terminal, and is made of drawn steel plate.
そして、上記容器内の渦巻電極群の上にポリプロピレン
製の絶縁板を配置した後、容器の開口部を、中央に正極
端子板を嵌合したポリプロピレン製の封口体を載置し、
開口部の縁を内側へ湾曲させることにより密閉封口して
、外径１６．０＋＋ｕｎ。After placing a polypropylene insulating plate on top of the spiral electrode group in the container, a polypropylene sealing body with a positive terminal plate fitted in the center is placed on the opening of the container,
The opening is hermetically sealed by curving the edge inward to create an outer diameter of 16.0++ un.
高さ３３．２＋ｎｍの円筒形二酸化マンガン／リチウム
電池を製造した。A cylindrical manganese dioxide/lithium battery with a height of 33.2+nm was fabricated.
なお、前記正極集電棒５と正極端子板とはリード線によ
り接続した。Note that the positive electrode current collector rod 5 and the positive electrode terminal plate were connected by a lead wire.
上記の電池を５００個試作した。電池製造の際、渦巻状
電極群作成の巻回末期工程において、負極板の変形や破
損による不良品は１つもなかった。Five hundred prototypes of the above batteries were manufactured. During battery manufacturing, there were no defective products due to deformation or damage to the negative electrode plate during the final winding process of creating the spiral electrode group.
さらにこれらの電池すべてについて、常温において、１
００Ωの条件で連続放電試験を行なったところ１本発明
の電池は全て、第６図に示したような放電特性曲線（実
線）を示した。Furthermore, for all of these batteries, at room temperature, 1
When a continuous discharge test was conducted under the condition of 00Ω, all of the batteries of the present invention exhibited a discharge characteristic curve (solid line) as shown in FIG.
比較例
金属リチウム板の金属薄板着設部に補強層を形成しない
点を除き実施例と同様の部材と構成からなる同一寸法の
円筒形二酸化マンガン／リチウム電池を５００個試作し
た。Comparative Example 500 cylindrical manganese dioxide/lithium batteries of the same size and size were fabricated using the same members and configuration as in the example except that no reinforcing layer was formed on the thin metal plate attachment portion of the metal lithium plate.
上記電池製造の際、渦巻状電極群作成の巻回末期工程に
おいて、負極板の変形や破損による不良品が１５個発生
していた。During the production of the above battery, 15 defective products were generated due to deformation or breakage of the negative electrode plate in the final winding process of creating the spiral electrode group.
さらに、かかる不良品の電池を除＜４８５個の電池を用
いて、実施例と同一条件の連続放電試験を行なったとこ
ろ、９９％の電池が第６図に示したような放電特性曲線
（破線）を示した。Furthermore, when we conducted a continuous discharge test under the same conditions as in the example using <485 batteries excluding such defective batteries, 99% of the batteries showed a discharge characteristic curve (broken line) as shown in Figure 6. )showed that.
実施例電池の放電特性曲線は正常なカーブを描いている
が、比較例電池の放電特性曲線は放電末期において、急
激な落ち込みを示している。これは、金属リチウムの分
断により、集電不能となったためである。The discharge characteristic curve of the example battery depicts a normal curve, but the discharge characteristic curve of the comparative example battery shows a sharp drop at the end of discharge. This is because it became impossible to collect current due to the fragmentation of metallic lithium.
［発明の効果］
以上の説明で明らかなように、本発明の円筒形非水電解
液電池は、負極板の機械的強度が改善され、また、放電
時のリチウムの分断も抑制されているので、良品の歩留
りが非常に優れ、かつ放電容量が大きく、放電性能が優
れた電池である。[Effects of the Invention] As is clear from the above explanation, the cylindrical nonaqueous electrolyte battery of the present invention has improved mechanical strength of the negative electrode plate, and also suppresses fragmentation of lithium during discharge. This battery has an extremely high yield of non-defective products, a large discharge capacity, and excellent discharge performance.
第１図は、本発明の一実施例における円筒形非水電解液
電池の負極板の平面図であり、第２図はその縦断面図で
ある。第３図は比較例として示した従来の円筒形非水電
解液電池の負極板の縦断面図である。第４図は、本発明
の円筒形非水電解液電池の渦巻状電極群の要部を示す横
断面図、第５図は、比較例として示した従来の円筒形非
水電解液電池の渦巻状電極群の要部を示す横断面図であ
る。第６図は、実施例及び比較例にかかる円筒形非水電
解液電池の放電特性曲線図である。
１・・・負極板（金属リチウム板）
２・・・金属薄板
４・・・セパレータ
５・・・集電棒
６・・・補強層
第
図
第
図
第
図
第
図
第
図FIG. 1 is a plan view of a negative electrode plate of a cylindrical non-aqueous electrolyte battery according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view thereof. FIG. 3 is a longitudinal sectional view of a negative electrode plate of a conventional cylindrical non-aqueous electrolyte battery shown as a comparative example. FIG. 4 is a cross-sectional view showing a main part of the spiral electrode group of the cylindrical non-aqueous electrolyte battery of the present invention, and FIG. 5 is a cross-sectional view of a conventional cylindrical non-aqueous electrolyte battery as a comparative example FIG. 3 is a cross-sectional view showing a main part of a shaped electrode group. FIG. 6 is a discharge characteristic curve diagram of cylindrical non-aqueous electrolyte batteries according to Examples and Comparative Examples. 1... Negative electrode plate (metallic lithium plate) 2... Metal thin plate 4... Separator 5... Current collector rod 6... Reinforcement layer
Claims (1)
、一方の端部に金属薄板を着設した長尺状の負極板とを
、前記金属薄板が最外周となるようにセパレータを介し
て渦巻状に巻回した渦巻状電極群を備えた円筒形非水電
解液電池において、該負極板の内周面側の金属薄板着設
部に、負極板面から金属薄板面にかかるように、電気絶
縁性の補強層を設けたことを特徴とする円筒形非水電解
液電池。A positive electrode plate having an active material supported on a long metal conductive base material and a long negative electrode plate having a thin metal plate attached to one end thereof are separated by a separator such that the thin metal plate is the outermost periphery. In a cylindrical non-aqueous electrolyte battery equipped with a spiral electrode group spirally wound through a cylindrical non-aqueous electrolyte battery, a thin metal plate attached on the inner peripheral surface side of the negative electrode plate is provided with a metal thin plate attached from the negative electrode plate surface to the metal thin plate surface. A cylindrical non-aqueous electrolyte battery characterized by having an electrically insulating reinforcing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32343288A JPH02170356A (en) | 1988-12-23 | 1988-12-23 | Cylindrical nonaqueous electrolyte cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32343288A JPH02170356A (en) | 1988-12-23 | 1988-12-23 | Cylindrical nonaqueous electrolyte cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02170356A true JPH02170356A (en) | 1990-07-02 |
Family
ID=18154613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32343288A Pending JPH02170356A (en) | 1988-12-23 | 1988-12-23 | Cylindrical nonaqueous electrolyte cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02170356A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001085066A (en) * | 1999-07-09 | 2001-03-30 | Matsushita Electric Ind Co Ltd | Nonaqueous electrolyte battery |
| KR100544109B1 (en) * | 1999-01-22 | 2006-01-23 | 삼성에스디아이 주식회사 | Electrode roll of secondary battery |
| JP2009152027A (en) * | 2007-12-20 | 2009-07-09 | Panasonic Corp | Organic electrolyte primary battery |
| JP2013508893A (en) * | 2009-10-14 | 2013-03-07 | エバレデイ バツテリ カンパニー インコーポレーテツド | Lithium-iron disulfide cell design |
-
1988
- 1988-12-23 JP JP32343288A patent/JPH02170356A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100544109B1 (en) * | 1999-01-22 | 2006-01-23 | 삼성에스디아이 주식회사 | Electrode roll of secondary battery |
| JP2001085066A (en) * | 1999-07-09 | 2001-03-30 | Matsushita Electric Ind Co Ltd | Nonaqueous electrolyte battery |
| JP4606551B2 (en) * | 1999-07-09 | 2011-01-05 | パナソニック株式会社 | Non-aqueous electrolyte battery |
| JP2009152027A (en) * | 2007-12-20 | 2009-07-09 | Panasonic Corp | Organic electrolyte primary battery |
| JP2013508893A (en) * | 2009-10-14 | 2013-03-07 | エバレデイ バツテリ カンパニー インコーポレーテツド | Lithium-iron disulfide cell design |
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