JPH038267A - Sealed secondary battery - Google Patents
Sealed secondary batteryInfo
- Publication number
- JPH038267A JPH038267A JP1140793A JP14079389A JPH038267A JP H038267 A JPH038267 A JP H038267A JP 1140793 A JP1140793 A JP 1140793A JP 14079389 A JP14079389 A JP 14079389A JP H038267 A JPH038267 A JP H038267A
- Authority
- JP
- Japan
- Prior art keywords
- lead
- battery
- adhesive layer
- base
- thickness
- 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
- 239000002985 plastic film Substances 0.000 claims abstract description 23
- 229920006255 plastic film Polymers 0.000 claims abstract description 23
- 239000012790 adhesive layer Substances 0.000 claims abstract description 20
- 239000010410 layer Substances 0.000 claims abstract description 17
- 239000011149 active material Substances 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims description 42
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 abstract description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 10
- 230000007423 decrease Effects 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- QHZOMAXECYYXGP-UHFFFAOYSA-N ethene;prop-2-enoic acid Chemical compound C=C.OC(=O)C=C QHZOMAXECYYXGP-UHFFFAOYSA-N 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920006027 ternary co-polymer Polymers 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 230000032258 transport Effects 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/121—Organic material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
Description
【発明の詳細な説明】
（発明の属する技術分野）
本発明は密閉形二次電池、さらに詳細には機器の小型化
に伴う電池の薄形化を実現すると共に、さらに長寿命化
を同時に可能にすることができる密閉型二次電池の構造
に関するものである。[Detailed Description of the Invention] (Technical Field to which the Invention Pertains) The present invention is directed to a sealed secondary battery, and more specifically, it is possible to make the battery thinner in line with the miniaturization of devices, and at the same time, to extend its lifespan. The present invention relates to the structure of a sealed secondary battery that can be used as a secondary battery.
（従来技術）
ポータプル機器などの小型機器の普及に伴い、安価で薄
形の密閉型二次電池の需要が増大している。その薄形化
の方法として、例えば特願昭６３−１８５０８５号に記
載されている密閉型二次電池がある。この電池はプラス
チックフィルムの同一平面上に正極板と負極板が並設さ
れ、正極板と負極板の各端面間の空間には硫酸を含有し
てなる電解質が充填されている。この構造を取ることに
より、充放電に伴う電池反応の場の進展方法が電極面間
ではなく、電極面と平行方向となる電極端面間の反応と
なる。これにより電極面中央部に位置する集電部の劣化
が保護されるため、電極厚さが薄くなっても寿命が低下
することなく薄形化を可能としている。該正・負極板は
特願平１−２０３５３号に示されているように、電池の
化学反応に寄与する活物質の層と該活物質層をプラスチ
ックフィルム基板上に良好に密着固定させるための密着
固定材かつ電気化学反応に伴う電流を正・負極端子に効
率良く輸送する集電体の役割を有する鉛系基体の層の２
層構造になっているのが一般的である。この鉛系基体の
形状は第１図（ａ）に示した電極形状と同じ「＜シ形」
状をしており、その鉛系基体とプラスチックフィルム基
体を密着させた後、釦ペーストを鉛系基体上にスクリー
ン印刷などにより塗布して活物質層を形成せしめ、電極
板となしている。鉛系基体のプラスチックフィルム基板
上への密着方法は、１）予め鉛系基体表面を粗化処理な
どの前処理を施して直接的に両者を熱ラミネートする方
法、２）鉛系基体面とプラスチックフィルム基板面の両
表面を同種の熱可塑性ポリマー層を予め形成させておき
、両者を熱ラミネートする方法によっている。(Prior Art) With the spread of small devices such as portable devices, the demand for inexpensive and thin sealed secondary batteries is increasing. As a method for making the battery thinner, for example, there is a sealed secondary battery described in Japanese Patent Application No. 185085/1985. In this battery, a positive electrode plate and a negative electrode plate are arranged side by side on the same plane of a plastic film, and the space between each end face of the positive electrode plate and the negative electrode plate is filled with an electrolyte containing sulfuric acid. By adopting this structure, the field of battery reaction that occurs during charging and discharging develops not between the electrode surfaces, but between the end surfaces of the electrodes that are parallel to the electrode surfaces. This protects the current collector located at the center of the electrode surface from deteriorating, so that even if the electrode thickness becomes thinner, the lifespan will not be reduced and it is possible to make the electrode thinner. As shown in Japanese Patent Application No. 1-20353, the positive and negative electrode plates include a layer of active material that contributes to the chemical reaction of the battery and a layer of active material that is used to firmly adhere and fix the active material layer on a plastic film substrate. 2 of the lead-based base layer, which serves as an adhesive fixing material and a current collector that efficiently transports the current accompanying the electrochemical reaction to the positive and negative terminals.
It generally has a layered structure. The shape of this lead-based substrate is the same as the electrode shape shown in Figure 1 (a).
After the lead-based base and the plastic film base are brought into close contact with each other, button paste is applied onto the lead-based base by screen printing or the like to form an active material layer to form an electrode plate. The methods for adhering the lead-based substrate to the plastic film substrate are: 1) performing pre-treatment such as roughening on the surface of the lead-based substrate and directly thermally laminating the two; 2) attaching the surface of the lead-based substrate to the plastic This method involves forming thermoplastic polymer layers of the same type on both surfaces of the film substrate in advance, and then thermally laminating the two layers.
このようにして作製した電極板はプラスチックフィルム
基板上に強固に密着しており、電極反応の進展方法の場
が正・負極活物質層の端面間での反応になるために、電
極巾が電極板中央部に位置する集電部の劣化保護に十分
な距雛を有していれば、電極板厚さを十分薄くすること
を可能ならしめている。The electrode plate produced in this way is firmly attached to the plastic film substrate, and since the electrode reaction progresses between the end faces of the positive and negative electrode active material layers, the electrode width is As long as the electrode plate has a sufficient distance to protect the current collector located at the center of the plate from deterioration, it is possible to make the electrode plate thickness sufficiently thin.
（発明が解決する問題点）
しかしながら、該電極板を構成している釣糸基体は、電
極板間に硫酸を含有してなる電解質と直接的に接触して
いるために、充放電期間中に鉛が硫酸鉛化または酸化鉛
化して鉛系基体の強度低下と集電体としての機能劣化を
起こしやすいために、電池寿命が短くなるという問題点
を有している。(Problems to be Solved by the Invention) However, since the fishing line base constituting the electrode plate is in direct contact with an electrolyte containing sulfuric acid between the electrode plates, lead to lead during the charging and discharging period. lead sulfate or lead oxide, which tends to reduce the strength of the lead base and deteriorate its function as a current collector, resulting in a shortened battery life.
本発明は、上述の問題点に鑑みなされたものであり、電
池の薄形という電池形状の特徴を損なうことなく、電池
の長寿命化を可能にする新しい密閉型二次電池を提供す
ることにある。The present invention was made in view of the above-mentioned problems, and an object of the present invention is to provide a new sealed secondary battery that makes it possible to extend the life of the battery without impairing the characteristics of the battery's thin shape. be.
（問題点を解決するための手段）
上記問題点を解決するため、本発明による密閉型二次電
池はプラスチックフィルム基板上に電極板である正極板
および負極板とを互いに離間対向させて配置した密閉型
二次電池において、前記電極板は鉛又は鉛合金からなる
鉛系基体と上記鉛系基体上に設けられた活物質層を含み
、前記プラスチックフィルム基体上に設けられた接着剤
層の一部に前記鉛系基体の一部又は全部が埋設されてい
ることを特徴とするものである。(Means for Solving the Problems) In order to solve the above problems, the sealed secondary battery according to the present invention has a positive electrode plate and a negative electrode plate, which are electrode plates, arranged on a plastic film substrate so as to be spaced apart from each other and face each other. In the sealed secondary battery, the electrode plate includes a lead base made of lead or a lead alloy, an active material layer provided on the lead base, and an adhesive layer provided on the plastic film base. A part or all of the lead-based substrate is embedded in the lead-based substrate.
したがって、鉛系基体の全部または一部が接着剤層に埋
め込まれていることにより、該鉛系基体が硫酸を含有し
てなる電解質と直接接触する面積の減少および該鉛系基
体の劣化速度の減少を可能ならしめている点が従来技術
と異なる。Therefore, by embedding all or part of the lead-based substrate in the adhesive layer, the area where the lead-based substrate comes into direct contact with the electrolyte containing sulfuric acid is reduced and the rate of deterioration of the lead-based substrate is reduced. This method differs from the conventional technology in that it allows for reduction.
第１図は、本発明の密閉型二次電池の構造を示しており
、ｌは正極板、２は負極板、３は電解質、４．４′はプ
ラスチックフィルム基板、５は安全弁である。FIG. 1 shows the structure of the sealed secondary battery of the present invention, where l is a positive electrode plate, 2 is a negative electrode plate, 3 is an electrolyte, 4.4' is a plastic film substrate, and 5 is a safety valve.
また、同図（ａ）は平面図、（ｂ）は前記第１図（ａ）
のＡ−Ａ’断面図である。活物質７と鉛系基体８とで電
極板である正極板１が構成されるが、活物質の性状が正
極用と負極用とで異なる以外は負極板の構成も同図（ｂ
）と同様である。Also, FIG. 1(a) is a plan view, and FIG. 1(b) is the same as in FIG. 1(a).
It is an AA' sectional view of. The positive electrode plate 1, which is an electrode plate, is composed of the active material 7 and the lead-based substrate 8, and the structure of the negative electrode plate is also the same as that shown in the same figure (b
).
上記第１図より明らかなように、プラスチックフィルム
基板４′上に接着剤層６を設けると共に、前記接着剤層
６に鉛系基体８の一部又は全部を埋設した構造になって
いる。そして前記釣糸基体８の上部には活物質７が設け
られており、電解質３は前記正極板Ｉ（負極板２）の間
に充填されている。As is clear from FIG. 1, the adhesive layer 6 is provided on the plastic film substrate 4', and a part or all of the lead base 8 is buried in the adhesive layer 6. An active material 7 is provided above the fishing line base 8, and an electrolyte 3 is filled between the positive electrode plates I (negative electrode plates 2).
プラスチックフィルム４は電池ケースも兼ねており、上
下のフィルム同士は安全弁の部分を除き、その外周が熱
シールされ密閉構造となっている。The plastic film 4 also serves as a battery case, and the outer peripheries of the upper and lower films are heat-sealed, except for the safety valve part, to form a sealed structure.
プラスチックフィルム４にコートされる接着剤層６の厚
さは鉛系基体８が接着剤層６に埋め込まれるのに適した
厚さであればよいが、鉛系基体８の厚さが５０μｍ〜１
００μｍの範囲の場合にはプラスチックフィルム基板４
にコートする接着剤Ｎ６の厚さは３０μｍ〜１５０μｍ
の範囲であることが望ましい、３０μｍ未満の場合には
鉛系基体８の埋め込みによる劣化防止効果が型機には認
め難く、前記プラスチツクフィルム基板４同士の熱シ−
ルの信頼性も乏しくなる。また、接着剤層６の厚さを１
５０μｍ以上にすると薄形電池の特徴である薄形化を損
なうことになるので好ましくない。The thickness of the adhesive layer 6 coated on the plastic film 4 may be a thickness suitable for embedding the lead-based substrate 8 in the adhesive layer 6, but the thickness of the lead-based substrate 8 may be 50 μm to 1 μm.
In the case of 00μm range, plastic film substrate 4
The thickness of adhesive N6 to be coated is 30 μm to 150 μm.
If the thickness is less than 30 μm, the deterioration prevention effect of embedding the lead-based substrate 8 will be difficult to recognize in the molding machine, and the heat sealing between the plastic film substrates 4 will be difficult.
The reliability of the system also decreases. Also, the thickness of the adhesive layer 6 is set to 1
If the thickness is 50 μm or more, it is not preferable because it impairs the thinness characteristic of thin batteries.
接着７￥ＩＩ層６としては一般的な接着剤で良いが、特
にホットメルト接着剤が保管のしやすさ、釣糸基体８と
の熱圧着作業のしやすさの点で望ましい。Although a general adhesive may be used as the adhesive 7\II layer 6, a hot melt adhesive is particularly preferable in terms of ease of storage and ease of thermocompression bonding with the fishing line base 8.
鉛系基体８の接着剤層６への埋め込み及び密着方法は、
一般的なプレス成形機を用いて加圧することにより行な
うことができる。また、望ましいホットメルト接着剤と
してはエチレン・アクリル酸・無水マレイン酸三元共重
合体、ポリオレフィン系接着性樹脂、エチレンビニルア
セテートの無水マレイン酸グラフト変性樹脂、などの材
料を用いた熱可塑性樹脂を成分としたものがある。The method for embedding and adhering the lead-based substrate 8 to the adhesive layer 6 is as follows:
This can be done by applying pressure using a general press molding machine. Desirable hot melt adhesives include thermoplastic resins using materials such as ethylene/acrylic acid/maleic anhydride ternary copolymers, polyolefin adhesive resins, and maleic anhydride graft modified resins of ethylene vinyl acetate. There are some ingredients.
次に、第１図に示した本発明による密閉型二次電池の性
能を確かめるための実施例を以下に示す。Next, an example for confirming the performance of the sealed secondary battery according to the present invention shown in FIG. 1 will be shown below.
（実施例１）
エチレン・アクリル酸・無水マレイン酸三元共重合体を
成分とするプラスチックフィルム基板上に塗布し、その
上にくし形の鉛系基体をプレス成形機にて形成し、その
後従来の薄形電池の一般的な製造方法で活物質、電解質
層を形成しプラスチックフィルムを熱シールし、第１図
に示す二次電池を形成した。このようにして作製した電
池の寸法は厚さ０ 、９ｍｍ、［５０ｍｍ、横７８ｍｍ
であり、接着剤層の塗布厚さは５０μｍ、鉛系基体の厚
さは５０μｍであった。この電池の２０時間率での容量
は約７０ｍＡｈであった。この電池を用いて２５℃、２
．４５Ｖの定電圧、最大充電電流１７．５ｍＡ、充電時
間６時間の条件での充電及び放電電流１７．５ｍＡ、放
電終止電圧１．７Ｖ、休止時間１時間の条件での放電の
サイクル寿命試験を行なった。その容量変化の結果は第
２図に示したとおりであった。(Example 1) A plastic film substrate containing a terpolymer of ethylene, acrylic acid, and maleic anhydride was coated, and a comb-shaped lead base was formed thereon using a press molding machine. The active material and electrolyte layers were formed using a general manufacturing method for thin batteries, and the plastic film was heat-sealed to form the secondary battery shown in FIG. The dimensions of the battery fabricated in this way were 0.9 mm in thickness, 50 mm in width, and 78 mm in width.
The coating thickness of the adhesive layer was 50 μm, and the thickness of the lead-based substrate was 50 μm. The capacity of this battery at a 20 hour rate was approximately 70 mAh. Using this battery, 25℃, 2
．． We conducted a cycle life test of charging under the conditions of constant voltage of 45V, maximum charging current of 17.5mA, charging time of 6 hours, and discharging under the conditions of discharge current of 17.5mA, discharge end voltage of 1.7V, and rest time of 1 hour. Ta. The results of the capacitance change were as shown in FIG.
（比較例）
本実施例の密閉形二次電池と比較するため、接着剤層６
を設けない第３図に示す構造の二次電池を作製した。す
なわち、鉛系基体８の下面とプラスチックフィルム基板
４′の上面にプラスチックフィルム４．４′と同種の厚
さ３０μｍのポリオレフィン系ポリマー層９を予め形成
させておき、該ポリオレフィン系ポリマー層９．９同士
をプレス成形機にて密着成形し、該プラスチックフィル
ム基板４′上にくし形の該鉛系基体８を形成した。後は
本実施例と同様にして密閉型二次電池を作製した。した
がって、電解質３が鉛系基体８の側面に接触した電池構
造となる。この電池の容量は約７０ｍＡｈ、電池の厚さ
は１ｍｍであった。この電池を用いて実施例に示したサ
イクル寿命試験を行なった。その容量変化の結果は第２
図に示したとおりであり、実施例のものに比べて寿命の
低下が認められた。(Comparative example) In order to compare with the sealed secondary battery of this example, adhesive layer 6
A secondary battery having the structure shown in FIG. 3 was fabricated without providing any. That is, a 30 μm thick polyolefin polymer layer 9 of the same type as the plastic film 4.4' is formed in advance on the lower surface of the lead-based substrate 8 and the upper surface of the plastic film substrate 4'. They were closely molded together using a press molding machine to form the comb-shaped lead-based substrate 8 on the plastic film substrate 4'. After that, a sealed secondary battery was produced in the same manner as in this example. Therefore, the battery structure is such that the electrolyte 3 is in contact with the side surface of the lead-based substrate 8. The capacity of this battery was approximately 70 mAh, and the thickness of the battery was 1 mm. Using this battery, the cycle life test shown in Examples was conducted. The result of that capacitance change is the second
As shown in the figure, a decrease in the life span was observed compared to that of the example.
実施例の電池は、比較例のものと比べてサイクル充放電
に対する容量低下は少なく、長寿命となっている。また
、電池厚さは１ｍｍ以下であり、薄形という電池形状の
特徴を損なってはいない。The battery of the example shows less capacity loss with respect to cycle charging and discharging than that of the comparative example, and has a longer life. Furthermore, the battery thickness is 1 mm or less, which does not impair the characteristic of the battery's thin shape.
（発明の効果）
以上説明したように、この発明においてはプラスチック
フィルム基板の同一平面上に正極板と負極板とが配置し
た密閉型二次電池において、該フィルム基板上に接着剤
層を設け、その接着剤層中に鉛系基体の一部または全部
を埋め込み、鉛系基体の端面と電解質の硫酸との接触を
少なくする構造を有しているため、従来の鉛系基体の端
面全面が硫酸と接触している密閉型二次電池と比べて、
電池の薄形形状の特徴を損なうことなく長寿命化を達成
させ得ているので、工業的価値は絶大なるものである。(Effects of the Invention) As explained above, in the present invention, in a sealed secondary battery in which a positive electrode plate and a negative electrode plate are arranged on the same plane of a plastic film substrate, an adhesive layer is provided on the film substrate, Part or all of the lead-based substrate is embedded in the adhesive layer, and has a structure that reduces contact between the end surface of the lead-based substrate and the sulfuric acid of the electrolyte, so that the entire end surface of the conventional lead-based substrate is Compared to a sealed secondary battery that is in contact with
Since it is possible to achieve a longer service life without impairing the characteristics of the battery's thin shape, its industrial value is enormous.
第１図は本発明の密閉型二次電池の（ａ）平面図及び（
ｂ”）Ａ−Ａ’面の断面図、第２図は本発明の実施例及
び比較例に示した電池の充放電サイクル数に対する初期
容量に対する容量変化曲線、第３図は接着剤層を設けな
い比較例の電池構造である。
ｌ・
・正極板、２・
・負極板、３・
・電解質、
４．４′・・・プラスチックフィルム基板、５・・・安
全弁、６・
・接着剤層、７・
・活物質、
８・
鉛系基体、９・
・ポリオレフィン系ポリマー層。FIG. 1 shows (a) a plan view and (
b") A cross-sectional view taken along the plane A-A', FIG. 2 is a capacity change curve of the initial capacity versus the number of charging/discharging cycles of the batteries shown in the examples and comparative examples of the present invention, and FIG. 3 is a cross-sectional view of the battery with an adhesive layer. This is the battery structure of a comparative example without the following. 1. Positive electrode plate, 2. Negative electrode plate, 3. Electrolyte, 4.4'... Plastic film substrate, 5. Safety valve, 6. Adhesive layer, 7. - Active material, 8. Lead-based substrate, 9. - Polyolefin-based polymer layer.
Claims (2)
板および負極板とを互いに離間対向させて配置した密閉
型二次電池において、前記電極板は鉛又は鉛合金からな
る鉛系基体と上記鉛系基体上に設けられた活物質層を含
み、前記プラスチックフィルム基体上に設けられた接着
剤層の一部に前記鉛系基体の一部又は全部が埋設されて
いることを特徴とする密閉型二次電池。(1) In a sealed secondary battery in which a positive electrode plate and a negative electrode plate, which are electrode plates, are placed facing each other and spaced apart from each other on a plastic film substrate, the electrode plate has a lead-based base made of lead or a lead alloy, and a lead-based base made of lead or a lead alloy. A closed type 2 comprising an active material layer provided on a substrate, and a part or all of the lead-based substrate is embedded in a part of the adhesive layer provided on the plastic film substrate. Next battery.
囲であり、かつ接着剤層の厚さは３０μｍ〜１５０μｍ
の範囲であることを特徴とする特許請求の範囲第１項記
載の密閉型二次電池。(2) The thickness of the lead-based substrate is in the range of 50 μm to 100 μm, and the thickness of the adhesive layer is in the range of 30 μm to 150 μm.
The sealed secondary battery according to claim 1, which is within the range of .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1140793A JPH0744039B2 (en) | 1989-06-02 | 1989-06-02 | Sealed secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1140793A JPH0744039B2 (en) | 1989-06-02 | 1989-06-02 | Sealed secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH038267A true JPH038267A (en) | 1991-01-16 |
| JPH0744039B2 JPH0744039B2 (en) | 1995-05-15 |
Family
ID=15276873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1140793A Expired - Fee Related JPH0744039B2 (en) | 1989-06-02 | 1989-06-02 | Sealed secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0744039B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007037657A (en) * | 2005-08-01 | 2007-02-15 | Nkk:Kk | Facial treatment mask |
-
1989
- 1989-06-02 JP JP1140793A patent/JPH0744039B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007037657A (en) * | 2005-08-01 | 2007-02-15 | Nkk:Kk | Facial treatment mask |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0744039B2 (en) | 1995-05-15 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |