JPS6142859A - Flat type battery - Google Patents
Flat type batteryInfo
- Publication number
- JPS6142859A JPS6142859A JP59163133A JP16313384A JPS6142859A JP S6142859 A JPS6142859 A JP S6142859A JP 59163133 A JP59163133 A JP 59163133A JP 16313384 A JP16313384 A JP 16313384A JP S6142859 A JPS6142859 A JP S6142859A
- Authority
- JP
- Japan
- Prior art keywords
- positive
- current collector
- resin sheet
- positive electrode
- conductive resin
- 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
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
- H01M4/64—Carriers or collectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or 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
- 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
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、有機電解質電池、特に扁平形電池の改良に関
するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to improvements in organic electrolyte batteries, particularly flat batteries.
従来例の構成とその問題点
゛ 扁平形の有機電解質電池は、負極端子を兼ねた封目
板、負極活物質、セパレータ、正極合剤、正極端子を兼
ねた電池ケースが積層状に構成されている。負極につい
ては負極活物質の粘着性を利用して封口板と活物質が圧
着されている。一方、正極合剤と正極ケースは接触によ
り電気的接続が図られているが、接触抵抗が大きく大電
流をとり出しにくい欠点がある。また、電池の放電中の
正負極の体積変化により、正極合剤と正極ケースの接触
度合が変動し、電池特性が変化したりする。Conventional structure and problems ゛ A flat organic electrolyte battery has a laminated structure including a sealing plate that also serves as a negative electrode terminal, a negative electrode active material, a separator, a positive electrode mixture, and a battery case that also serves as a positive electrode terminal. There is. As for the negative electrode, the sealing plate and the active material are pressure-bonded using the adhesiveness of the negative electrode active material. On the other hand, although the positive electrode mixture and the positive electrode case are electrically connected by contact, there is a drawback that the contact resistance is large and it is difficult to extract a large current. Further, due to changes in the volume of the positive and negative electrodes during discharge of the battery, the degree of contact between the positive electrode mixture and the positive electrode case changes, and the battery characteristics change.
そこで、従来はチタンや、ステンレス鋼等の金属集電体
を正極ケース内底面に取りつけ、その上に正極合剤を載
置し、正極合剤に集電体をくい込ませるようにして接触
させていた。この方法により、正極側の集電効果は向上
しだが、集電体が金属で硬いため、電池封口時のように
圧力がかかった場合、正極合剤にひびが入ったり、割れ
たりする現象がみられた。この現象は正極合剤の厚さの
薄い、薄型電池で著しい。Therefore, in the past, a metal current collector made of titanium or stainless steel was attached to the inner bottom of the positive electrode case, a positive electrode mixture was placed on top of it, and the current collector was inserted into the positive electrode mixture to make contact. Ta. This method improves the current collection effect on the positive electrode side, but since the current collector is made of metal and is hard, when pressure is applied, such as when sealing a battery, the positive electrode mixture may crack or break. It was seen. This phenomenon is remarkable in thin batteries with a thin positive electrode mixture.
仁のため、正極ケースに金属集電体を取りつけず、ケー
ス内底面にカーボンと水ガラスからなるカーボン塗料を
塗布し、集電体とすることが考えられた。しかし、塗料
を厚く、均一な厚さに塗布することが難しく、正極合剤
へのくい込みが十分な集電体を形成することが困難であ
り、くい込み状態を良くするため厚く塗布した場合は厚
さのバラツキが生じやすく、電池寸法がバラツクという
問題があった。For this reason, it was considered to not attach a metal current collector to the positive electrode case, but to apply a carbon paint made of carbon and water glass to the inside bottom of the case to use it as a current collector. However, it is difficult to apply the paint thickly and uniformly, and it is difficult to form a current collector that penetrates into the positive electrode mixture sufficiently. There was a problem that variations in battery size were likely to occur and variations in battery dimensions.
発明の目的
本発明は、上記のような従来の欠点を解消し、正極合剤
と正極ケースの接触が確実で良好な扁平形電池を提供す
ることを目的とする。OBJECTS OF THE INVENTION An object of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide a flat battery in which the positive electrode mixture and the positive electrode case have reliable and good contact.
発明の構成
本発明は、正極ケース内面に変性ポリプロピレンとカー
ボンブラックの複合材よシなる導電性樹脂シートを円形
、角形等に打ち抜いたものを載置して集電体とし、この
導電性樹脂集電体に正極合剤を接触させるものである。Structure of the Invention The present invention provides a current collector by placing a conductive resin sheet made of a composite material of modified polypropylene and carbon black into a circular or square shape on the inner surface of a positive electrode case. The positive electrode mixture is brought into contact with the electric body.
この構成によれば、前記導電性樹脂シート集電体は有機
電解液にも化学的に安定であシ、正極合剤の接触抵抗が
低く、かつ集電体が弾力性を有しているため、封口時の
加圧等によっても正極合剤が割れることもなく良好な接
触状態が保てる。また均一な厚さのシート状に成形でき
るため、集電体としての厚さも一定であり、電池寸法の
バラツキも少なく、かつ種々の形状に加工できるため、
任意の形状の集電体が得られるという利点もある。According to this configuration, the conductive resin sheet current collector is chemically stable even in an organic electrolyte, the contact resistance of the positive electrode mixture is low, and the current collector has elasticity. , the positive electrode mixture does not break even when pressure is applied during sealing, and a good contact state can be maintained. In addition, since it can be formed into a sheet of uniform thickness, the thickness of the current collector is constant, there is little variation in battery dimensions, and it can be processed into various shapes.
Another advantage is that a current collector of any shape can be obtained.
実施例の説明 以下、本発明の詳細な説明する。Description of examples The present invention will be explained in detail below.
第１図は扁平形電有機電解質電池を示す。図において１
は正極端子を兼ねたステンレス鋼製正極ケース、２はス
テンレス鋼製の負極端子を兼ねた封口板であり、内面に
リチウムシートからなる負極活物質３が圧着されている
。４はポリプロピレンの不織布からなるセパレータ、６
はフッ化炭素。FIG. 1 shows a flat electrolyte cell. In the figure 1
2 is a stainless steel positive electrode case that also serves as a positive electrode terminal; 2 is a stainless steel sealing plate that also serves as a negative electrode terminal; and a negative electrode active material 3 made of a lithium sheet is crimped onto the inner surface. 4 is a separator made of polypropylene nonwoven fabric; 6
is fluorocarbon.
カーボン、バインダーを混合して直径１５朧の円板状に
加圧成形した正極合剤である。６は一辺９順の正方形に
打ち抜いたポリプロピレンとカーボンブラックの複合材
からなる導電性樹脂シートであり、厚さは０．１聾であ
る。電解液には有機電解液を用いて、先の部材を積層状
に重ねあわせ、絶縁バッキング７を介して正極ケース１
端部を内方にかしめて封口して電池を構成した。この電
池の総高は１．６圏、直径は２０ｍである。This is a positive electrode mixture that is made by mixing carbon and a binder and press-molding it into a disk shape with a diameter of 15 mm. Reference numeral 6 denotes a conductive resin sheet made of a composite material of polypropylene and carbon black, which is punched into a square shape with nine sides on each side, and has a thickness of 0.1 mm. Using an organic electrolyte as the electrolyte, the above members are stacked on top of each other in a layered manner, and then the positive electrode case 1 is placed through the insulating backing 7.
The ends were caulked inward and sealed to form a battery. The total height of this battery is 1.6 meters and the diameter is 20 meters.
なおこの例では正極活物質としてフッ化炭素を用いだが
、他に二酸化マンガン、酸化銅、硫化鉄。In this example, carbon fluoride was used as the positive electrode active material, but other materials include manganese dioxide, copper oxide, and iron sulfide.
酸化モリブデン、クロム酸銀等を用いたものでも同様の
効果を得ることができる。また導電性樹脂シートの形状
は円形、四角形、六角形等の角形でも良い。A similar effect can be obtained using molybdenum oxide, silver chromate, or the like. Further, the conductive resin sheet may have a rectangular shape such as a circle, a square, or a hexagon.
ここで用いた導電性樹脂シートはポリプロピレンにポリ
エチレンを共重合させて変性した樹脂にカーボンブラッ
クを２０〜４０重量％添加し導電性をもたせたものであ
る。The conductive resin sheet used here is made by adding 20 to 40% by weight of carbon black to a modified resin obtained by copolymerizing polypropylene with polyethylene to give it conductivity.
基材となるポリプロピレンは耐有機電解液性があり、有
機電解液電池のセパレータやガスケット材料にも使用さ
れている。このポリプロピレンにポリエチレンを共重合
させて変性することにより、カーボンブラックとのなじ
みがよくなり、樹脂と導電材の混合が容易になる。まに
シート状に成形した時の強度が強くなる。共重合させる
ポリエチレンの割合は２〜６重量％が適切である。The base material, polypropylene, is resistant to organic electrolytes and is also used as separator and gasket materials for organic electrolyte batteries. By copolymerizing this polypropylene with polyethylene to modify it, it becomes more compatible with carbon black, making it easier to mix the resin and the conductive material. This increases the strength when formed into a sheet. The appropriate proportion of polyethylene to be copolymerized is 2 to 6% by weight.
次に正極ケースと合剤との間に集電体を用いなかったも
のをＡ、導電性塗料を塗布したものをＢ。Next, A is the one in which no current collector is used between the positive electrode case and the mixture, and B is the one in which a conductive paint is applied.
金属集電体を用いたものをＣ２上記に示した本発明の電
池をＤとし、放電前の内部抵抗（１）、容量の８０チ放
電した時点の内部抵抗（■）、電池を６０℃中に１００
日間保存した後の放電前の内部抵抗（■）。The battery of the present invention shown above is designated as D, and the internal resistance before discharge (1), the internal resistance at the time of discharging 80 inches of capacity (■), and the battery at 60°C using a metal current collector. 100 to
Internal resistance before discharge after storage for days (■).
電池組立時の合剤割れの発生数（ｎ＝５０）（ＩＶ）を
次表に示す。The number of occurrences of mixture cracking (n=50) (IV) during battery assembly is shown in the following table.
なお、電池Ｂについては、導電性塗料の塗布量を多くす
ると、電池寸法のバラツキが生じた。Regarding battery B, when the amount of applied conductive paint was increased, variations in battery dimensions occurred.
発明の効果
以上の実施例からも明らかなように、ポリプロピレンと
カーボンブランクの複合材からなる正極集電体は化学的
に安定であり、これを用いた電池の放電初期から放電末
期まで内部抵抗が小さく安定しており、高温の保存にお
いても変化が少ない。Effects of the Invention As is clear from the above examples, the positive electrode current collector made of a composite material of polypropylene and carbon blank is chemically stable, and the internal resistance of the battery using it is stable from the beginning of discharge to the end of discharge. It is small and stable, and does not change much even when stored at high temperatures.
また、電池組立時の合剤割れ等の発生もなく、安定した
電池を得ることができる。Furthermore, a stable battery can be obtained without the occurrence of cracking of the mixture during battery assembly.
第１図は本発明の実施例における扁平形電池の縦断面図
、第２図は各種の形状の導電性樹脂集電体を載置したケ
ースの例を示す平面図である。
１・・・・・・ケース、２・・・・・・封口板、３・・
川・負極、４・・・・・・セパレータ、６・・・・・・
正極合剤、６・・・・・・正極集電体、７・・・・・・
絶縁バッキング。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図FIG. 1 is a longitudinal sectional view of a flat battery according to an embodiment of the present invention, and FIG. 2 is a plan view showing examples of cases in which conductive resin current collectors of various shapes are placed. 1... Case, 2... Sealing plate, 3...
River/Negative electrode, 4... Separator, 6...
Positive electrode mixture, 6... Positive electrode current collector, 7...
Insulated backing. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2
Claims (2)
電解液とを、正極端子を兼ねる電池ケースと負極端子を
兼ねる封口板により密封する電池であって、電池ケース
の内底部と正極合剤の間に変性ポリプロピレンとカーボ
ンブラックよりなる導電層を介在させたことを特徴とす
る扁平形電池。(1) A battery in which a negative electrode made of a light metal as an active material, a positive electrode mixture, and an organic electrolyte are sealed by a battery case that also serves as a positive terminal and a sealing plate that also serves as a negative terminal; A flat battery characterized by interposing a conductive layer made of modified polypropylene and carbon black between a positive electrode mixture.
許請求の範囲第１項記載の扁平形電池。(2) The flat battery according to claim 1, wherein the conductive layer is in the form of a circular or square sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59163133A JPS6142859A (en) | 1984-08-02 | 1984-08-02 | Flat type battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59163133A JPS6142859A (en) | 1984-08-02 | 1984-08-02 | Flat type battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6142859A true JPS6142859A (en) | 1986-03-01 |
Family
ID=15767817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59163133A Pending JPS6142859A (en) | 1984-08-02 | 1984-08-02 | Flat type battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6142859A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11297332A (en) * | 1998-04-13 | 1999-10-29 | Tdk Corp | Current collector and sheet type electrochemical element using the same |
| JP5224622B1 (en) * | 2012-06-08 | 2013-07-03 | 太陽誘電株式会社 | Electrochemical devices |
-
1984
- 1984-08-02 JP JP59163133A patent/JPS6142859A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11297332A (en) * | 1998-04-13 | 1999-10-29 | Tdk Corp | Current collector and sheet type electrochemical element using the same |
| JP5224622B1 (en) * | 2012-06-08 | 2013-07-03 | 太陽誘電株式会社 | Electrochemical devices |
| US8722232B2 (en) | 2012-06-08 | 2014-05-13 | Taiyo Yuden Co., Ltd. | Electrochemical device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4121021A (en) | Silver oxide primary cell | |
| US3486940A (en) | Storage battery having a positive electrode comprising a supporting base of titanium nitride having a surface film of non-polarizing material | |
| EP2472641A1 (en) | Nickel-zinc battery and manufacturing method thereof | |
| KR20060048062A (en) | Secondary battery | |
| EP0061724B1 (en) | Cell employing a coiled electrode assembly | |
| JPS63175345A (en) | Organic electrolyte battery | |
| US3485672A (en) | Electric current producing cell | |
| JPS6142859A (en) | Flat type battery | |
| US3261715A (en) | Negative electrode assembly for alkaline batteries | |
| JPS5772272A (en) | Solid lithium battery and its manufacture | |
| JP2608561B2 (en) | Stacked battery | |
| CN208352363U (en) | A kind of lithium battery with dynamic sealing mechanism | |
| JPS6142860A (en) | Flat type battery | |
| CN2588549Y (en) | Electrode | |
| JPS61133571A (en) | Flat battery | |
| JPH04237955A (en) | Nonaqueous secondary battery | |
| JPS594453Y2 (en) | battery | |
| JPH0719088Y2 (en) | Thin battery | |
| JPS6142868A (en) | Nonaqueous electrolyte battery | |
| JPH067493B2 (en) | Flat battery | |
| JPH01173569A (en) | Flat battery | |
| JPS6175512A (en) | Electric double-layer capacitor | |
| JPH0545022Y2 (en) | ||
| JPS60246559A (en) | Flat organic electrolyte cell | |
| JPH01307169A (en) | Manufacture of organic solvent battery |