JPS636987B2 - - Google Patents
Info
- Publication number
- JPS636987B2 JPS636987B2 JP1345181A JP1345181A JPS636987B2 JP S636987 B2 JPS636987 B2 JP S636987B2 JP 1345181 A JP1345181 A JP 1345181A JP 1345181 A JP1345181 A JP 1345181A JP S636987 B2 JPS636987 B2 JP S636987B2
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- lithium
- positive electrode
- current collector
- 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
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 49
- 229910052744 lithium Inorganic materials 0.000 claims description 49
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 239000011255 nonaqueous electrolyte Substances 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 14
- 229910052759 nickel Inorganic materials 0.000 description 7
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 239000011149 active material Substances 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- OJKANDGLELGDHV-UHFFFAOYSA-N disilver;dioxido(dioxo)chromium Chemical compound [Ag+].[Ag+].[O-][Cr]([O-])(=O)=O OJKANDGLELGDHV-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 229910001947 lithium oxide 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
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QLOAVXSYZAJECW-UHFFFAOYSA-N methane;molecular fluorine Chemical compound C.FF QLOAVXSYZAJECW-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
Description
【発明の詳細な説明】
本発明は、帯状の正極と帯状の金属リチウムを
代表とする負極とをセパレータを間に介在して渦
巻状に巻回した電極群と、非水電解液とを備えた
円筒形非水電解液電池の改良に関し、信頼性が高
くしかもコスト的に安価な電池を提供することを
目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention comprises an electrode group in which a band-shaped positive electrode and a band-shaped negative electrode, typically made of metallic lithium, are spirally wound with a separator interposed therebetween, and a non-aqueous electrolyte. Regarding the improvement of cylindrical non-aqueous electrolyte batteries, the present invention aims to provide highly reliable and inexpensive batteries.
負極に金属リチウムを用いるこの種の電池は、
その高電圧、高エネルギー密度、長期保存性など
のすぐれた特性がエレクトロニクス技術の進歩と
相まつて実用化が進められ、現在市場で実用化さ
れている電池としては、リチウム／フツ化炭素系
電池、リチウム／二酸化マンガン系電池がある。
これらのリチウム電池は既に市場において、電子
ウオツチ、電卓、カメラ、各種の通信機器用電
源、各種メモリー用バツクアツプ電源として広く
実用化され、今後益々エレクトロニクス技術の進
歩に伴つて用途の拡大が予測される。 This type of battery uses metallic lithium as the negative electrode,
Its excellent properties such as high voltage, high energy density, and long shelf life, together with advances in electronics technology, have led to its practical use.Batteries currently in practical use on the market include lithium/fluorocarbon batteries, There are lithium/manganese dioxide batteries.
These lithium batteries are already widely used in the market as power supplies for electronic watches, calculators, cameras, various communication devices, and backup power supplies for various types of memory, and their applications are expected to expand in the future as electronics technology advances. .
それに伴い効率的かつ合理的で信頼性の高いリ
チウム電池の構造、製造法が必要かつ重要な課題
となつている。 Accordingly, efficient, rational, and highly reliable lithium battery structures and manufacturing methods have become necessary and important issues.
本発明はこのような要望を満たすため、電極群
が渦巻構造に形成されている円筒形リチウム電池
の主に信頼性を高めることを目的としたものであ
る。 In order to meet these demands, the present invention is aimed primarily at improving the reliability of a cylindrical lithium battery in which an electrode group is formed in a spiral structure.
リチウム電池には、現在正極活物質としてフツ
化黒鉛、二酸化マンガン、酸化銅、硫化銅、クロ
ム酸銀など種々のものが実用化あるいは提案され
ているが、これら正極活物質と対をなす負極活物
質としてはいずれも金属リチウムが使用されてい
る。金属リチウムは活物質それ自体が金属である
ため、電気の良伝導体である。この点から言え
ば、活物質でありながらしかも集電体をかねるこ
とが可能である。 Currently, various positive electrode active materials for lithium batteries, such as graphite fluoride, manganese dioxide, copper oxide, copper sulfide, and silver chromate, have been put into practical use or have been proposed. Metallic lithium is used as the material in both cases. Metallic lithium is a good conductor of electricity because the active material itself is a metal. From this point of view, it is possible to use it as an active material and also as a current collector.
しかしながら、リチウム電池においてはどのよ
うな正極活物質を用いた電池系においてもリチウ
ムは溶解型の反応形態であり、Li→Li+＋ｅの反
応によつて次第に消耗していく。このため通常は
リチウムに集電体としてニツケルなどの金属のネ
ツトが取り付けられている。 However, in a lithium battery, lithium is in a dissolved reaction form in any battery system using any positive electrode active material, and is gradually consumed by the reaction of Li→Li + +e. For this reason, a metal net such as nickel is usually attached to lithium as a current collector.
これは、一般的にリチウム電池においてはリチ
ウムが溶解電極であり、正極に比べて反応性が高
くほぼ100％の利用率であり、これに対し、正極
は利用率が一般的に低いため、正極と負極の容量
比率は１：１もしくは正極の充填量を負極よりも
多くして負極律則型とするのが通常であることに
も一因がある。 This is because, in general, in lithium batteries, lithium is the dissolving electrode, which has higher reactivity than the positive electrode and has a utilization rate of almost 100%; This is partly due to the fact that the capacity ratio of the negative electrode and the negative electrode is usually 1:1 or the filling amount of the positive electrode is larger than that of the negative electrode to form a negative electrode rule type.
特に円筒形電池において電極群構造が渦巻形の
場合には薄形で長尺な帯状電極がセパレータを介
し相対して巻回されている。この電池を放電する
と長尺のリチウム負極は全面で均一に反応を開始
する。そして反応量に応じて表面から溶解してリ
チウムは次第に薄くなつていく。例えば第１図に
示すごとき長尺のリチウム負極で説明するに、図
中１は金属リチウム本体であり、２はリチウムと
電池の外部端子とをつなぐための集電片であり、
ニツケル薄板より成つている。このリチウム負極
が反応した場合を考えると、リチウムが何らかの
原因で、もし不均一に反応した場合、とくに中間
部分Ａが最も早く反応した場合にはその部分が溶
解してしまい、電極全体がＢ部とＣ部とに二分割
され、Ｂ部とＣ部間の導通がなくなり、以後集電
片２とは離れたＢ部は実質的に反応に関与しなく
なり、結果的に容量の小さな電池となつてしま
う。このような問題をさけるため、実際の電池に
おいては第２図に示す如く集電片２にさらに集電
体３として、例えばニツケル等の金属より成るネ
ツトあるいはエキスパンドメタルなどを取付け、
これを金属リチウム１に埋め込み、万一リチウム
１が不均一な反応を起こしても途中でリチウムが
分断されるようなトラブルを防ぎ、リチウム全部
が反応に有効に関与できるようになされている。 Particularly in the case of a cylindrical battery having a spiral electrode group structure, thin and long strip-shaped electrodes are wound around each other with a separator in between. When this battery is discharged, the long lithium negative electrode starts to react uniformly over its entire surface. Then, depending on the amount of reaction, the lithium gradually becomes thinner as it dissolves from the surface. For example, in the case of a long lithium negative electrode as shown in FIG. 1, 1 is the metal lithium body, 2 is a current collector piece for connecting the lithium to the external terminal of the battery,
Made of thin nickel plate. Considering the case where this lithium negative electrode reacts, if lithium reacts unevenly for some reason, especially if middle part A reacts fastest, that part will dissolve and the entire electrode will become part B. The battery is divided into two parts, ie, part B and part C, and there is no conduction between part B and part C. From then on, part B, which is separate from current collector piece 2, does not substantially participate in the reaction, resulting in a battery with a small capacity. I end up. In order to avoid such problems, in actual batteries, as shown in FIG. 2, a net made of metal such as nickel or expanded metal is further attached as a current collector 3 to the current collector piece 2.
This is embedded in the metal lithium 1, and even if lithium 1 were to cause an uneven reaction, troubles such as lithium being separated midway through can be prevented, and all of the lithium can effectively participate in the reaction.
この集電体３としてニツケルネツトあるいはエ
キスパンドメタルなどを用いる理由としては、こ
の集電体３がリチウムを覆つている部分は、反応
に関与しなく、リチウムの有効反応面積をその分
だけロスさせるためにできる限りこのロス分を少
なくすると同時にリチウムへの埋込みを容易にす
るためである。 The reason why nickel net or expanded metal is used as the current collector 3 is that the part of the current collector 3 that covers the lithium does not take part in the reaction, and the effective reaction area of lithium is lost accordingly. This is to reduce this loss as much as possible and at the same time facilitate embedding into lithium.
実際に電池を組立てる場合には、第３図に示す
如き帯状の正極４と第２図図示の帯状の金属リチ
ウム負極１とをセパレータを間に介在して渦巻状
に巻回した電極群を、電池ケース内へ挿入するこ
とでなされる。 When actually assembling a battery, an electrode group consisting of a strip-shaped positive electrode 4 as shown in FIG. 3 and a strip-shaped metal lithium negative electrode 1 shown in FIG. 2 are wound spirally with a separator interposed between them. This is done by inserting it into the battery case.
第４図はこのようにして構成された電池の半断
面図を示し、図中５は正極端子キヤツプ６を備え
た封口板で、中心部に透孔５ａを有したポリプロ
ピレンからなり、透孔５ａにニツケルメツキを施
した鉄ワツシヤ７ａ及びチタンよりなるワツシヤ
７ｂを嵌合したアルミニウムリベツト８をかしめ
つけ、さらにワツシヤ７ａの上に正極端子シキヤ
ツプ６がスポツト溶接で取付けられている。１は
前述の片面全体にエキスパンドメタルからなる集
電体３を埋込んだ負極であり、４は活物質である
フツ化炭素に導電剤としてアセチレンブラツク、
結着剤としてフツ素樹脂を添加した合剤９をチタ
ンのエキスパンド１０に塗着した正極である。こ
の正、負極はそれぞれ目付重量20ｇ／m2のポリプ
ロピレン不織布１１で包まれて渦巻状に巻回さ
れ、鉄にニツケルメツキを施した電池ケース１２
内に挿入され、負極の集電片２、正極の集電片２
ａがそれぞれ電池ケース１２の上部内面部、封口
板５のチタン製ワツシヤ７ｂにスポツト溶接によ
り接続されている。なお電池ケース１２内にはそ
の封口前に非水電解液として、ｒ−ブチロラクト
ンに１モル／の濃度でホウフツ化リチウムを溶
解した液が注入され、密封されて電池を形成して
いる。 FIG. 4 shows a half-sectional view of the battery constructed in this way, and in the figure, 5 is a sealing plate equipped with a positive terminal cap 6, which is made of polypropylene and has a through hole 5a in the center. An aluminum rivet 8 fitted with a nickel-plated iron washer 7a and a titanium washer 7b is caulked, and a positive terminal terminal cap 6 is attached to the washer 7a by spot welding. 1 is a negative electrode in which a current collector 3 made of expanded metal is embedded in the entire surface of one side, and 4 is a negative electrode with acetylene black as a conductive agent in carbon fluoride as an active material.
This is a positive electrode in which a mixture 9 to which a fluororesin is added as a binder is applied to an expanded titanium layer 10. The positive and negative electrodes are each wrapped in a polypropylene nonwoven fabric 11 with a basis weight of 20 g/m 2 and wound spirally, and a battery case 12 made of nickel plated iron is wrapped.
The negative electrode current collector piece 2 and the positive electrode current collector piece 2 are inserted into the
a are connected to the upper inner surface of the battery case 12 and the titanium washer 7b of the sealing plate 5 by spot welding. Note that before the battery case 12 is sealed, a non-aqueous electrolyte in which lithium borofluoride is dissolved in r-butyrolactone at a concentration of 1 mol/l is injected into the battery case 12, and the battery case is sealed to form a battery.
この電池は負極である帯状の金属リチウムの片
面全体に集電体としてエキスパンドメタルを埋込
むことにより、反応を完全に行なわせる点では問
題はないが、次のような点においては問題があつ
た。 This battery has no problem in that the reaction can be carried out completely by embedding expanded metal as a current collector on one side of the strip-shaped metal lithium that is the negative electrode, but there are problems in the following points. .
すなわち、集電体として反応を阻害する部分を
できる限り少なくする目的でエキスパンドメタル
あるいはニツケルのネツトなどが用いられるが、
これらエキスパンドメタルあるいはネツトの切口
がバリとなつて存在する。このバリがヒゲ状に張
出したり、起き上つたりすると、セパレータを破
つて突抜け、対極である正極に接触して短絡する
という事故が多々生じていた。この短絡事故の可
能性は集電体の外周距離、換言すれば集電体が大
きくなればなる程起こる確立が高いことは当然予
測されることである。このような事故はリチウム
電池の特徴である長寿命、長期保存性の点からし
ても好ましくなく、信頼性の高い電池を作る上で
の最大の課題となつていた。 In other words, expanded metal or nickel nets are used as current collectors in order to minimize the portions that inhibit the reaction.
These expanded metal or net cuts exist as burrs. When these burrs protrude like whiskers or rise up, they often break through the separator and come into contact with the opposite positive electrode, causing a short circuit. It is naturally predicted that the probability of this short circuit occurring increases as the outer circumferential distance of the current collector increases, in other words, the larger the current collector becomes. Such accidents are undesirable from the viewpoint of the long life and long-term storage properties that are characteristic of lithium batteries, and have become the biggest challenge in producing highly reliable batteries.
本発明はこの点を改善するために、負極集電片
を小さくしてその外周距離を短かくし短絡発生を
なくすとともに、反応が負極の金属リチウム全体
で均一かつ完全に行なわれ、小さな集電片を用い
たにもかかわらず、リチウムの帯状長手方向途中
での切断起きることのない、同じ幅の帯状正極よ
りも帯状のリチウム負極を容量面から厚く、例え
ば正極の厚みの1.1〜1.68倍として正極律則型と
した電池を提供するものである。 In order to improve this point, the present invention aims to reduce the size of the negative electrode current collector piece and shorten its outer circumferential distance to eliminate the occurrence of short circuits. Even though the lithium is used, the strip-shaped lithium negative electrode is made thicker in terms of capacity than the strip-shaped positive electrode of the same width, so that lithium does not break in the middle of the strip in the longitudinal direction. The present invention provides a regular type battery.
本発明をさらに詳しく述べれば、負極の金属リ
チウムはそれ自体良導電体であり、しかも展延性
に優れた金属であつて、必要電気量に対して計算
が容易であり、必要量が容易にコントロールでき
る点に着目したものであり、渦巻状電極群とした
場合には均一反応を確保でき、しかもリチウムの
必要量が意図的に容易にコントロールできること
にある。この負極リチウム量をコントロールする
ことにより、正極律則型でしかも小形の負極集電
片で集電が可能な、信頼性が高くエネルギー密度
の大きな円筒形非水電解液電池の提供が可能にな
つたものである。 To explain the present invention in more detail, the metallic lithium of the negative electrode is itself a good conductor and is a metal with excellent malleability, and the required amount of electricity can be easily calculated and the required amount can be easily controlled. This method focuses on the fact that a spiral electrode group can ensure a uniform reaction, and the required amount of lithium can be easily and intentionally controlled. By controlling the amount of lithium in the negative electrode, it becomes possible to provide a cylindrical non-aqueous electrolyte battery with high reliability and high energy density, which is a positive electrode type and can collect current with a small negative electrode current collector piece. It is something that
以下実施例について説明する。 Examples will be described below.
実施例 １
第５図に示す電池において、正極４としてフツ
化炭素を活物質とした合剤９をチタンよりなるエ
キスパンドメタル１０に厚さ0.8mmにローラ充填
し、乾燥後ローラ圧延によつて0.35mmの厚さに圧
縮する。この正極は１cm2当り40mgのフツ化炭素を
含み、電気量換算で34.6ｍAhとなる。この正極
４を幅24mm、長さ180mmに切断して第３図の如く
上辺中央部に厚さ0.1mm、幅４mmのチタン製集電
片２ａを取付ける。Example 1 In the battery shown in FIG. 5, a mixture 9 containing carbon fluoride as the active material for the positive electrode 4 was filled into an expanded metal 10 made of titanium to a thickness of 0.8 mm, and after drying, it was rolled to a thickness of 0.35 mm. Compress to mm thickness. This positive electrode contains 40 mg of carbon fluoride per 1 cm 2 and has an electrical capacity of 34.6 mAh. This positive electrode 4 was cut into a piece having a width of 24 mm and a length of 180 mm, and a titanium current collector piece 2a having a thickness of 0.1 mm and a width of 4 mm was attached to the center of the upper side as shown in FIG.
一方、負極１として幅24mm、長さ180mm、厚さ
0.20mmの金属リチウムを用意し、第６図の如くそ
の渦巻状に巻回した際巻終り端部下部に、ニツケ
ル製の額縁状非加工部にとり囲まれたエンボス加
工部１３ａに厚さ0.1mm、幅４mmのリード部１３
ｂをスポツト溶接した集電片１３をエンボス加工
部１３ａで圧入固定する。この負極１の１cm2当り
の有効電気量は約39ｍAhであり、これは正極の
電気容量面での厚さの約1.12倍である。 On the other hand, as negative electrode 1, the width is 24 mm, the length is 180 mm, and the thickness is
When 0.20 mm of metallic lithium is prepared and wound into a spiral shape as shown in Figure 6, an embossed part 13a surrounded by a frame-like unprocessed part made of nickel is formed at the bottom of the end of the winding with a thickness of 0.1 mm. , lead part 13 with a width of 4 mm
The current collector piece 13 with the spot welded portions b is press-fitted and fixed at the embossed portion 13a. The effective amount of electricity per 1 cm 2 of this negative electrode 1 is about 39 mAh, which is about 1.12 times the thickness of the positive electrode in terms of capacitance.
これら正、負両極をそれぞれ前述のポリプロピ
レン不織布セパレータ１１で包んで渦巻状電極群
とし、電池ケース１２内へ挿入するとともに、封
口前に非水電解液2.8c.c.を注入した。 These positive and negative electrodes were each wrapped with the aforementioned polypropylene nonwoven fabric separator 11 to form a spiral electrode group, which was inserted into the battery case 12, and 2.8 cc of non-aqueous electrolyte was injected before sealing.
なお、負極のリード部１３ｂは電極群下部より
電池ケース１２の内底部とポリプロピレン製下部
絶縁板１４との間にはさみ込んでケース内底部に
引出し、ケース内底部中央とスポツト溶接した。 The negative electrode lead portion 13b was inserted from the lower part of the electrode group between the inner bottom of the battery case 12 and the polypropylene lower insulating plate 14, pulled out to the inner bottom of the case, and spot welded to the center of the inner bottom of the case.
このように容量面から負極の厚みが、正極のそ
れよりも厚い、正極律則型電池では負極は放電末
期においても完全には消失せず、薄い膜状で残存
するので、負極集電片１３としては小形で金属リ
チウムの一部に圧入されたものであればよく、切
断口にバリ発生の問題がある集電片にあつては負
極の正極とは対向しない巻終り端部下部に内側か
ら外側に向けて圧入するのが好ましい。 In this way, in a positive electrode regulation type battery in which the thickness of the negative electrode is thicker than that of the positive electrode in terms of capacity, the negative electrode does not completely disappear even at the end of discharge and remains in the form of a thin film. As long as it is small and press-fitted into a part of the metal lithium, it is sufficient that the current collector piece has a problem of burr generation at the cut end, and it should be inserted from the inside at the bottom of the end of the winding that does not face the positive electrode of the negative electrode. It is preferable to press fit outward.
実施例 ２
正極４は二酸化マンガンを活物質とした合剤９
をステンレス鋼製ネツトにローラ充填し、乾燥後
ローラ圧延して0.40mmの厚みとする。この正極の
１cm2当りの電気量は約29ｍAhである。この正極
を幅24mm、長さ160mmに切断し、上辺中央部に集
電片２ａを取付ける。対極であるリチウム負極１
は幅24mm、長さ160mm、厚さ約0.17mmで１m2当り
の電気量は約35ｍAhであり、正極との容量面か
らの厚さ比率は約１：1.2であつた。渦巻状電極
群の電池ケース内への挿入後、プロピレンカーボ
ネートとジメトキシエタンとの等量混合溶媒に過
塩素酸リチウムを溶解した電解液2.8c.c.を注入し
て前記同様電池を密封した。Example 2 Positive electrode 4 is a mixture 9 containing manganese dioxide as an active material
Filled with a roller into a stainless steel net, dried and rolled to a thickness of 0.40 mm. The amount of electricity per 1 cm 2 of this positive electrode is approximately 29 mAh. This positive electrode is cut into a width of 24 mm and a length of 160 mm, and a current collector piece 2a is attached to the center of the upper side. Lithium negative electrode 1, which is the counter electrode
had a width of 24 mm, a length of 160 mm, and a thickness of about 0.17 mm, the amount of electricity per square meter was about 35 mAh, and the thickness ratio with respect to the positive electrode in terms of capacity was about 1:1.2. After inserting the spiral electrode group into the battery case, 2.8 cc of an electrolyte solution in which lithium perchlorate was dissolved in a mixed solvent of equal amounts of propylene carbonate and dimethoxyethane was injected, and the battery was sealed in the same manner as described above.
本発明者らの検討によれば、前記正極律則型の
２種類の渦巻状電極群を備えた電池系では負極リ
チウムの均一反応を期待でき、正極：負極の容量
面からの厚み比率は１：1.1〜1.68の範囲が体積
効率、負極集電片の小形、薄型化の点で適してい
ることが判明した。この範囲内であれば、負極で
ある金属リチウムの反応に伴う分断等を生じるこ
となく、小形で薄い集電片を、負極リチウムの一
部に圧入するのみで放電末期まで十分に集電可能
である。 According to the studies of the present inventors, a uniform reaction of the negative electrode lithium can be expected in a battery system equipped with two types of spiral electrode groups of the positive electrode rule type, and the thickness ratio of the positive electrode:negative electrode from the capacity perspective is 1. : The range of 1.1 to 1.68 was found to be suitable in terms of volumetric efficiency, compactness and thinness of the negative electrode current collector piece. Within this range, it is possible to sufficiently collect current until the end of discharge by simply press-fitting a small, thin current collector piece into a portion of the negative electrode lithium, without causing separation due to the reaction of the negative electrode metal lithium. be.
第１図、第２図はこれまでの電池における負極
の金属リチウム電極を示す図、第３図は対極であ
る正極を示す図、第４図はこれらを用いて構成し
たこれまでの円筒形非水電解液電池の半断面図、
第５図は本発明の実施例における円筒形非水電解
液電池の半断面図、第６図は負極集電片の一例を
拡大して示した図である。
１……金属リチウムからなる負極、２，２ａ…
…集電片、３……集電体、４……正極、１１……
セパレータ、１２……電池ケース、１３……負極
の集電片、１３ａ……エンボス加工部、１３ｂ…
…リード部、１３ｃ……額縁部。
Figures 1 and 2 are diagrams showing metal lithium electrodes as negative electrodes in conventional batteries, Figure 3 is a diagram showing a positive electrode as a counter electrode, and Figure 4 is a diagram of conventional cylindrical non-contact electrodes constructed using these. Half cross section of water electrolyte battery,
FIG. 5 is a half-sectional view of a cylindrical non-aqueous electrolyte battery according to an embodiment of the present invention, and FIG. 6 is an enlarged view of an example of a negative electrode current collector piece. 1... Negative electrode made of metallic lithium, 2, 2a...
...Current collector piece, 3...Current collector, 4...Positive electrode, 11...
Separator, 12... Battery case, 13... Negative electrode current collector piece, 13a... Embossed part, 13b...
...Lead part, 13c...Picture frame part.
Claims (1)
ウムからなる負極とをセパレータを間に介在して
渦巻状に巻回した電極群と、非水電解液とを備え
た電池であつて、容量面から前記正極よりも負極
を厚くして正極律則型とするとともに、前記帯状
の金属リチウムからなる負極の一部に、額縁状非
加工部にとり囲まれて金属リチウムに圧入される
エンボス加工部とリード部とを一体に設けた金属
薄板からなる小形の集電片を固定したことを特徴
とする円筒形非水電解液電池。 ２ 前記負極の集電片が、負極の正極との非対向
面にエンボス加工部が圧入されている特許請求の
範囲第１項記載の円筒形非水電解液電池。[Scope of Claims] 1. An electrode group comprising a strip-shaped positive electrode having the same width and a strip-shaped negative electrode made of metallic lithium that are spirally wound with a separator interposed therebetween, and a non-aqueous electrolyte. The battery is a positive electrode type in which the negative electrode is thicker than the positive electrode in terms of capacity, and a part of the negative electrode made of the strip-shaped metal lithium is surrounded by a frame-shaped unprocessed part to make the metal lithium. A cylindrical non-aqueous electrolyte battery characterized by having a small current collector piece made of a thin metal plate integrally provided with an embossed part and a lead part to be press-fitted. 2. The cylindrical non-aqueous electrolyte battery according to claim 1, wherein the current collector piece of the negative electrode has an embossed part press-fitted into a surface of the negative electrode that does not face the positive electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1345181A JPS57128467A (en) | 1981-01-30 | 1981-01-30 | Cylindrical non-aqueous electrolytic solution battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1345181A JPS57128467A (en) | 1981-01-30 | 1981-01-30 | Cylindrical non-aqueous electrolytic solution battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57128467A JPS57128467A (en) | 1982-08-10 |
| JPS636987B2 true JPS636987B2 (en) | 1988-02-15 |
Family
ID=11833498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1345181A Granted JPS57128467A (en) | 1981-01-30 | 1981-01-30 | Cylindrical non-aqueous electrolytic solution battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57128467A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006040875A (en) * | 2004-07-29 | 2006-02-09 | Samsung Sdi Co Ltd | Electrode assembly and lithium secondary battery using it |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL73394A (en) * | 1983-11-02 | 1987-10-30 | Raychem Ltd | Method of making a protected electrode from sensitive materials |
| JPS61166471U (en) * | 1985-04-04 | 1986-10-15 | ||
| JPH0526696Y2 (en) * | 1986-02-28 | 1993-07-06 | ||
| US4729162A (en) * | 1986-06-11 | 1988-03-08 | Duracell Inc. | Electrochemical cell asssembly |
| JP4255013B2 (en) * | 2003-11-18 | 2009-04-15 | 日立マクセル株式会社 | Non-aqueous electrolyte battery |
-
1981
- 1981-01-30 JP JP1345181A patent/JPS57128467A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006040875A (en) * | 2004-07-29 | 2006-02-09 | Samsung Sdi Co Ltd | Electrode assembly and lithium secondary battery using it |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57128467A (en) | 1982-08-10 |
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