JPS6174255A - Manufacturing method of flat battery - Google Patents
Manufacturing method of flat batteryInfo
- Publication number
- JPS6174255A JPS6174255A JP59197140A JP19714084A JPS6174255A JP S6174255 A JPS6174255 A JP S6174255A JP 59197140 A JP59197140 A JP 59197140A JP 19714084 A JP19714084 A JP 19714084A JP S6174255 A JPS6174255 A JP S6174255A
- Authority
- JP
- Japan
- Prior art keywords
- insulating member
- sheet
- battery
- frame
- terminal plate
- 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
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
- H01M6/12—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with flat electrodes
-
- 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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
- H01M50/557—Plate-shaped terminals
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Primary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、２枚のシート状端子板の周縁部間に枠状絶縁
部材を介在させ、熱溶着により密封して形成される電池
室に扁平な発電要素を収納する扁平形電池の製造方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a battery chamber which is formed by interposing a frame-shaped insulating member between the peripheral edges of two sheet-shaped terminal plates and sealing them by heat welding. The present invention relates to a method of manufacturing a flat battery containing a power generation element.
従来例の構成とその間垣点
従来、この種の扁平形電池として提案されている代表的
な電池の部分断面図を第１図に示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a partial cross-sectional view of a typical battery that has been conventionally proposed as this type of flat battery.
第１図において、１はニッケル裂の負担集電体を兼ねた
シート状端子板、２はこのシート状端子板１の片面に圧
着されたリチウムよりなる負極活物質、３は電解液を含
んだポリプロピレン製不織布からなるセパレータ、４は
二酸化マンガンを主体とした正極層、６ば５ＵＳｓ１ｅ
ｓのステンレス鋼よりなる正極集電体を兼ねたシート状
端子板である。６は、１．５の負極及び正極集電体をな
すシート状端子板の周縁端部間に介在し、この周縁部を
密封する熱溶着性の変性ポリエチレンよりなる枠状絶縁
部材である。さらに枠状絶縁部材６を挾持するシート状
端子板の少なくとも一方、ここでは正極端子板６に環状
の溝部７を設け、これにより電池内部への外気や水分の
侵入を防いでいる。In Figure 1, 1 is a sheet-shaped terminal plate that also serves as a current collector bearing the burden of nickel cracks, 2 is a negative electrode active material made of lithium that is crimped on one side of this sheet-shaped terminal plate 1, and 3 is an electrolyte containing an electrolyte. Separator made of polypropylene nonwoven fabric, 4 is a positive electrode layer mainly composed of manganese dioxide, 6 is 5USs1e
This is a sheet-shaped terminal plate that also serves as a positive electrode current collector made of stainless steel. Reference numeral 6 denotes a frame-shaped insulating member made of heat-weldable modified polyethylene that is interposed between the peripheral edges of the sheet-like terminal plates forming the negative electrode and positive electrode current collectors of 1.5 and seals the peripheral edges. Furthermore, at least one of the sheet-shaped terminal plates that sandwich the frame-shaped insulating member 6, here the positive terminal plate 6, is provided with an annular groove 7, thereby preventing outside air and moisture from entering the inside of the battery.
ここでの溝部７は、あらかじめシート状端子板の周縁部
にプレス加工により形成される。そしてこの溝部を有し
た第２図のようなシート状端子板を枠状絶縁部材と熱溶
着する工程がとられていた。The groove portion 7 here is formed in advance on the peripheral edge of the sheet-like terminal plate by press working. Then, a step was taken to thermally weld a sheet-shaped terminal plate having this groove as shown in FIG. 2 to a frame-shaped insulating member.
この方法の問題点は、シート状端子板と枠状絶縁部材と
の接着力が弱いために保存中に両部材間に生じた間隙（
図示しない）を通して電池内部へ外気の水分か侵入する
ことである。この外気の水分か電池内部へ侵入すること
により、負極活物質であるリチウムと水分とが反応して
水素ガスを発生し、電池か膨張して電池寿命を短かくし
ていた。The problem with this method is that the adhesive force between the sheet-shaped terminal plate and the frame-shaped insulating member is weak, and a gap (
This is due to moisture from the outside air entering the inside of the battery through the battery (not shown). When this moisture from the outside air enters the inside of the battery, the lithium, which is the negative electrode active material, reacts with the moisture to generate hydrogen gas, causing the battery to expand and shortening its lifespan.
発明の目的
本発明は上記従来例の問題点を解決し、電池内部への水
蒸気の侵入を防ぎ、長寿命の扁平形電池を提供するもの
である。OBJECTS OF THE INVENTION The present invention solves the problems of the prior art, prevents water vapor from entering the battery, and provides a long-life flat battery.
発明の構成
本発明′は上記の目的を達成するため、シート状端子板
の周縁端部間に枠状絶縁部材を挾み込んで扁平な発電要
素を密封し、その後に前記枠状絶縁部材を挟持する少な
くとも一方のシート状端子板の周縁部を環状の溝入れ用
金型により加熱加圧することにより環状の溝部を形成す
るものである。Structure of the Invention In order to achieve the above-mentioned object, the present invention' involves inserting a frame-shaped insulating member between the peripheral edges of a sheet-shaped terminal plate to seal a flat power generating element, and then inserting the frame-shaped insulating member. An annular groove is formed by heating and pressing the peripheral edge of at least one of the sandwiched sheet-like terminal plates using an annular grooving mold.
このようにすれば、絶縁部材と端子板との接着界面に前
述した間隙部が形成されないので、間隙を通して電池内
へ侵入してくる空気中の水分を抑制でき、負極活物質で
あるリチウムと水分との反応による水素ガスの発生を抑
制し、電池寿命を長く保つことができる。In this way, the above-mentioned gap is not formed at the bonding interface between the insulating member and the terminal plate, so it is possible to suppress moisture in the air that enters into the battery through the gap, and to prevent moisture from entering the battery between lithium, which is the negative electrode active material. It is possible to suppress the generation of hydrogen gas due to the reaction with the battery and maintain a long battery life.
以下、その詳細は実施例により説明する。The details will be explained below using examples.
実施例の説明
本発明の最初の工程における電池の部分断面図を第３図
に示す。負極集電体を兼ねるシート状端子板１のニッケ
ルンートの片面に負極活物質２であるリチウムを貼付け
る。一方、ステンレス鋼ヨりなる正極集電体を兼ねたシ
ート状端子板５上に、二酸化マンガンとカーボン粉末と
バインダーとからなる正極層４を塗布する。次に正極層
の上に非水電解液を含んだポリプロピレン製不織布から
なるセパレータ３をのせ、正極集電体を兼ねる端子板５
の周縁部に、熱溶着性の変性ポリエチレンよりなる枠状
絶縁部材６を載置する。次に負極活物質２を貼付けた負
極端子板１をその上にのせ、枠状絶縁部材６に一方の端
子板側から１８０’Ｃの温度で５秒間加熱し、同時に５
Ｋｑ ／ ｔｙＡの圧力を加えて負極端子板１と正極端
子板５とに熱溶着する。この際第３図のように正、負の
端子板と絶縁部材との熱溶着面８は平面状態を深ってい
る。DESCRIPTION OF THE EMBODIMENTS A partial cross-sectional view of a battery in the first step of the present invention is shown in FIG. Lithium, which is the negative electrode active material 2, is pasted on one side of the nickel pad of the sheet-like terminal plate 1, which also serves as the negative electrode current collector. On the other hand, a positive electrode layer 4 made of manganese dioxide, carbon powder, and a binder is applied onto a sheet-like terminal plate 5 made of stainless steel that also serves as a positive electrode current collector. Next, a separator 3 made of a non-woven polypropylene fabric containing a nonaqueous electrolyte is placed on the positive electrode layer, and a terminal plate 5 that also serves as a positive electrode current collector is placed on the positive electrode layer.
A frame-shaped insulating member 6 made of heat-weldable modified polyethylene is placed on the peripheral edge of the frame. Next, the negative electrode terminal plate 1 with the negative electrode active material 2 pasted thereon is placed on top of it, and the frame-shaped insulating member 6 is heated from one terminal plate side to 180'C for 5 seconds.
A pressure of Kq/tyA is applied to thermally weld the negative terminal plate 1 and the positive terminal plate 5. At this time, as shown in FIG. 3, the thermally welded surfaces 8 between the positive and negative terminal plates and the insulating member are in a deep planar state.
次に、第３図のように端子板の熱溶着面が平面になって
いる周縁部に第４図に示すように溝入れ用金型９により
加熱加圧して溝部アを形成する。Next, as shown in FIG. 4, a groove portion A is formed on the peripheral edge of the terminal plate where the heat-welded surface is flat as shown in FIG. 3 by applying heat and pressure using a grooving die 9.
ここでの加熱、加圧の条件としては、２００ ’Ｃのと
温度で６秒の加熱と約ｓ Ｋｇ ／ ｃＡの加圧戸毛た
。The heating and pressurizing conditions here were heating for 6 seconds at a temperature of 200'C and pressurizing at about s Kg/cA.
この実施例は電池として片面のみの溝部の形成であるが
、正、負の端子板の両方、すなわち両面に溝部を設けれ
ばより一層効果がある。また環状溝部は一条の溝で説明
したが、内外にわたって２条以上設ければさらに効果か
ある。In this embodiment, the grooves are formed only on one side of the battery, but it will be even more effective if grooves are provided on both the positive and negative terminal plates, that is, on both sides. Further, although the annular groove section has been described with one groove, it will be even more effective if two or more grooves are provided both inside and outside.
次に従来の端子板周縁にあらかじめ溝部を設けたものを
用いて電池を構成し７たものと、前述した熱溶着により
端子板同士を平面状に封口した後に、熱溶着部にさらに
溝部を形成した電池の保存性能を比較すると、次の様に
なった。すなわち温度６０で相対湿度９０％の貯蔵環境
で１００にΩの負荷をつないで連続放電させ、３０日後
の残存容量比率を比較すると前者は５０チ、後者は９５
％であった。Next, a battery is constructed using a conventional terminal plate with a groove provided in advance on the periphery, and after the terminal plates are sealed in a flat shape by heat welding as described above, a groove is further formed in the heat welded part. A comparison of the storage performance of these batteries shows the following: In other words, in a storage environment with a temperature of 60% and a relative humidity of 90%, a load of 100Ω is connected to the battery and the remaining capacity ratio is compared after 30 days.
%Met.
この理由は、溝入れ用金型で端子板と枠状絶縁部材とを
加熱加圧することにより両者間に形成される界面におい
て、絶縁部材が端子板のミクロ的な表面の凹凸の中にく
い込むことにより気密的に密着し、端子板と絶縁部材の
界面では電極外部からの水蒸気が透過しにくくなるから
である。The reason for this is that when the terminal board and the frame-shaped insulating member are heated and pressurized using a grooving mold, the insulating member sinks into the microscopic surface irregularities of the terminal board at the interface formed between the two. This is because the terminal board and the insulating member are brought into close contact with each other in an airtight manner, making it difficult for water vapor from outside the electrode to permeate through the interface between the terminal board and the insulating member.
すなわち、従来は枠状絶縁部材の端子板との接着面全面
に熱がかかる状態であった。一方本発明では枠状絶縁部
材の上下全面を端子板に熱溶着にて接着した後、第２の
工程で局部的に加熱加圧を行なうため、枠状絶縁部材の
局部的に加熱加圧を受けた部分（第４図中１１で示す部
分）のみが溶融し、加熱加圧されない部分１０は殆んど
溶融しない状態になる。この際加熱加圧を受けた樹脂部
は樹脂の流れの逃げ場がなくなり、その結果として絶縁
部材が端子板のミクロ的な表面凹凸の中にくい込み、さ
らには若干その密度も高くなる。従って端子板と絶縁部
材の界面を通じての電池外部からの水蒸気か侵入透過は
しにくくなる。That is, conventionally, heat was applied to the entire adhesive surface of the frame-shaped insulating member to the terminal board. On the other hand, in the present invention, after the upper and lower surfaces of the frame-shaped insulating member are bonded to the terminal board by thermal welding, local heating and pressure is applied in the second step. Only the portion that receives the heat (the portion indicated by 11 in FIG. 4) melts, and the portion 10 that is not heated and pressurized remains almost unmelted. At this time, the resin part heated and pressurized has no place for the flow of resin to escape, and as a result, the insulating member is embedded into the microscopic surface irregularities of the terminal board, and furthermore, its density becomes slightly higher. Therefore, it becomes difficult for water vapor to enter and permeate from outside the battery through the interface between the terminal board and the insulating member.
発明の効果
以上のように本発明では、枠状絶縁部材と端子板との界
面で、電池内部へ侵入しようとする空気中の水分を阻止
でき、長寿命の扁平形電池を提供できるものである。Effects of the Invention As described above, the present invention can prevent moisture in the air from entering the battery at the interface between the frame-shaped insulating member and the terminal plate, and can provide a flat battery with a long life. .
第１図は従来の扁平形電池の部分断面図、第２図は同電
池に用いるシート状端子板の部分断面図、第３図は本発
明の実施例における扁平形電池のシート状端子板と枠状
絶縁部材とを熱溶着した部分断面図、第４図は同熱溶着
部に環状溝部を形成した際の部分断面図である。
１・・・・・負極のシート状端子板、２・・・負極活物
質、３・・・・・セパレータ、４−・・正極層、６・・
・・・・正極のシート状端子板、６ ・・枠状絶縁部材
、７・・・・環状溝部。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第
１ 図
第２図
、／７FIG. 1 is a partial sectional view of a conventional flat battery, FIG. 2 is a partial sectional view of a sheet terminal plate used in the same battery, and FIG. 3 is a partial sectional view of a sheet terminal plate of a flat battery according to an embodiment of the present invention. FIG. 4 is a partial cross-sectional view showing the frame-shaped insulating member being thermally welded together, and FIG. 4 is a partial cross-sectional view showing an annular groove formed in the thermally welded portion. 1... Negative electrode sheet-like terminal plate, 2... Negative electrode active material, 3... Separator, 4-... Positive electrode layer, 6...
. . . Positive electrode sheet-like terminal plate, 6 . . . Frame-shaped insulating member, 7 . . . Annular groove. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 2, /7
Claims (1)
子板の間に、セパレータを介して対向するよう扁平な発
電要素を配置し、前記シート状端子板の周縁端部間に枠
状絶縁部材を挾み込んで前記発電要素を密封する工程と
、前記枠状絶縁部材を挾持する少なくとも一方のシート
状端子板の周縁部を環状金型により加熱加圧して周縁部
に環状の溝部を形成する工程とを有する扁平形電池の製
造方法。A flat power generation element is arranged between two sheet-shaped terminal plates that also serve as current collectors for the positive and negative electrodes, so as to face each other with a separator in between, and a frame-shaped insulating member is placed between the peripheral edges of the sheet-shaped terminal plates. a step of sandwiching the power generating element to seal it; and a step of heating and pressurizing the peripheral edge of at least one of the sheet-shaped terminal plates that clamps the frame-shaped insulating member using an annular mold to form an annular groove in the peripheral edge. A method for manufacturing a flat battery comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59197140A JPS6174255A (en) | 1984-09-20 | 1984-09-20 | Manufacturing method of flat battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59197140A JPS6174255A (en) | 1984-09-20 | 1984-09-20 | Manufacturing method of flat battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6174255A true JPS6174255A (en) | 1986-04-16 |
| JPH041464B2 JPH041464B2 (en) | 1992-01-13 |
Family
ID=16369423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59197140A Granted JPS6174255A (en) | 1984-09-20 | 1984-09-20 | Manufacturing method of flat battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6174255A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1184914A4 (en) * | 2000-01-24 | 2004-09-22 | Mitsubishi Electric Corp | PACKING FOR MATERIAL CONTAINING NON-AQUEOUS SOLVENT AND CELL CONTAINING THIS |
| KR100768178B1 (en) * | 2001-10-13 | 2007-10-17 | 삼성에스디아이 주식회사 | Lithium secondary battery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53121135A (en) * | 1977-03-30 | 1978-10-23 | Suwa Seikosha Kk | Thin flat type battery |
-
1984
- 1984-09-20 JP JP59197140A patent/JPS6174255A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53121135A (en) * | 1977-03-30 | 1978-10-23 | Suwa Seikosha Kk | Thin flat type battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1184914A4 (en) * | 2000-01-24 | 2004-09-22 | Mitsubishi Electric Corp | PACKING FOR MATERIAL CONTAINING NON-AQUEOUS SOLVENT AND CELL CONTAINING THIS |
| KR100768178B1 (en) * | 2001-10-13 | 2007-10-17 | 삼성에스디아이 주식회사 | Lithium secondary battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH041464B2 (en) | 1992-01-13 |
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