JPH03141552A - Sealed secondary battery - Google Patents
Sealed secondary batteryInfo
- Publication number
- JPH03141552A JPH03141552A JP1278437A JP27843789A JPH03141552A JP H03141552 A JPH03141552 A JP H03141552A JP 1278437 A JP1278437 A JP 1278437A JP 27843789 A JP27843789 A JP 27843789A JP H03141552 A JPH03141552 A JP H03141552A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- electrode plate
- safety valve
- secondary battery
- sealed
- 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
- 239000003792 electrolyte Substances 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 238000004381 surface treatment Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 12
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 229910001882 dioxygen Inorganic materials 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012756 surface treatment agent Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
Classifications
-
- 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
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の属する技術分野）
本発明は密閉型二次電池、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
および高信頼化を可能にすることができる気密性良好な
密閉型二次電池に関するもので特にチューブ状合成樹脂
からなる安全弁の改良に関するものである。Detailed Description of the Invention (Technical field to which the invention pertains) The present invention provides a sealed secondary battery, more specifically, a battery that can be made thinner in line with the miniaturization of devices, and also has a longer lifespan and higher reliability. The present invention relates to a sealed secondary battery with good airtightness that can be used to improve airtightness, and in particular to an improvement of a safety valve made of a tubular synthetic resin.
（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、たとえば、特願昭６３−１８５０８５号
に記載されている密閉型二次電池がある。(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.
この電池は、第１図に示すように電槽６をかねたプラス
チックフィルム基板の同一平面上に正極板１と負極板２
が並設され、正極板１と負極板２の各端面間の空間には
硫酸を含有してなる電解質３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
ても電池寿命が低下することなく薄形化を可能としてい
る。As shown in FIG. 1, this battery has a positive electrode plate 1 and a negative electrode plate 2 on the same plane of a plastic film substrate which also serves as a battery case 6.
are arranged in parallel, and the space between each end face of the positive electrode plate 1 and the negative electrode plate 2 is filled with an electrolyte 3 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, making it possible to make the battery thinner without reducing battery life even if the electrode becomes thinner.
このような密閉型二次電池は、フィルム状またはシート
状合成樹脂製の電槽６で熱シールすることにより密閉し
、充電時に正極板ｌで発生した酸素ガスをガラス繊維製
セパレータ３を通過させて、負極板２に吸収させる構造
となっている。したがって、通常は電池外部へガスが散
逸することはない、しかし、大電流で充電した場合には
、負極板２での酸素ガス吸収能力よりも正極板１で発生
するガス量が多い上に、負極板２からも水素ガスが発生
するため、電池を完全密封にすると電池内圧が上がり、
電槽が破裂する恐れがある。そのため電池内圧が上昇す
ると、ガスを開放するような安全弁５が設けられている
。−船釣には、この種の電池の電槽６は、厚さ０．１ｍ
ｍ程度の合成樹脂製フィルムから構成され、極板群の周
囲を一ケ所に未溶着部を残して熱溶着し、上記未溶着内
部にオイルを充填し安全弁部５としている。この安全弁
部５は、開弁によるガス放出のほかに、大気中の酸素ガ
スが電池内部へ侵入すると負極板２を酸化し寿命を短く
するため、逆止弁をかねた機能が必要とされていた。Such a sealed secondary battery is hermetically sealed by heat-sealing it with a battery case 6 made of film or sheet synthetic resin, and oxygen gas generated at the positive electrode plate 1 during charging is passed through a glass fiber separator 3. The structure is such that the negative electrode plate 2 absorbs it. Therefore, normally gas does not dissipate to the outside of the battery, but when charging with a large current, the amount of gas generated in the positive electrode plate 1 is greater than the oxygen gas absorption capacity of the negative electrode plate 2, and Hydrogen gas is also generated from the negative electrode plate 2, so if the battery is completely sealed, the internal pressure of the battery will increase.
The battery case may explode. Therefore, a safety valve 5 is provided which releases the gas when the internal pressure of the battery increases. - For boat fishing, the battery case 6 of this type of battery should be 0.1 m thick.
The safety valve part 5 is made of a synthetic resin film having a thickness of approximately 1.5 m, and is thermally welded around the electrode plate group leaving an unwelded part at one place, and the unwelded interior is filled with oil to form the safety valve part 5. This safety valve section 5 is required to function as a check valve because, in addition to releasing gas when the valve is opened, when oxygen gas from the atmosphere enters the battery, it oxidizes the negative electrode plate 2 and shortens its life. Ta.
（発明が解決しようとする問題点）
しかしこのような構造の安全弁では、ガラス繊維製セパ
レータから遊離した電解質が安全弁と接触し易く、ガス
発生時に電解液が滲み使用電気機器を腐食させる危険性
が高かった。さらに、オイルが電池内部に拡散し易く電
池性能を低下させるという問題点があった。(Problem to be solved by the invention) However, in a safety valve with such a structure, the electrolyte released from the glass fiber separator tends to come into contact with the safety valve, and there is a risk that the electrolyte will leak when gas is generated and corrode the electrical equipment used. it was high. Furthermore, there is a problem in that oil tends to diffuse into the battery, degrading battery performance.
本発明は上述の問題点を解決すること、すなわちガス発
生時に電解液が滲まず、またオイルの電池内部への拡散
を抑制し、電池性能の低下しない密閉型二次電池を提供
することを目的とする。The purpose of the present invention is to solve the above-mentioned problems, that is, to provide a sealed secondary battery in which the electrolytic solution does not bleed when gas is generated, the diffusion of oil into the battery is suppressed, and the battery performance does not deteriorate. shall 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、正極板、負極板および電解質とで構成された極板
群を覆うように２枚のフィルム基板間に配置して、その
２枚のフィルム基板の外周を熱シールして袋状の密閉構
造を形成した密閉型二次電池において、開口部と封口部
をそれぞれの端に有するチューブまたはチューブ状突起
が側面に切り込みを有する構造の安全弁部を前記熱シー
ル部のシート間に配置することを特徴とする。(Means for Solving the Problems) In order to solve the above problems, the sealed secondary battery according to the present invention includes two electrode plates that cover a group of electrode plates composed of a positive electrode plate, a negative electrode plate, and an electrolyte. A tube or tube that has an opening and a sealing part at each end in a sealed secondary battery that is placed between film substrates and heat-sealed the outer periphery of the two film substrates to form a bag-like sealed structure. A safety valve portion having a structure in which a shaped protrusion has a notch on the side surface is disposed between the sheets of the heat sealing portion.
このように安全弁部を小径のチューブまたはチューブ状
突起とすることにより、ガラス繊維製セパレータから遊
離した電解質がチューブまたはチューブ状突起内部には
侵入しにくい構造となっているため、ガス発生時に電解
液が滲み使用電気機器を腐食させることはない、また小
径のチューブまたはチューブ状突起に切り込みを設ける
ことにより、内圧の上昇に伴い切り込み部でチューブま
たはチューブ状突起が折れ曲がるため、切り込み部が開
きガス排気が可能となる。この切り込みの深さ、側面の
肉厚を変えることにより容易に開弁圧を調整することが
可能である。さらに、定常時および減圧時には切り口は
閉じた状態となっているなめ、大気中の酸素ガスが電池
内部へ侵入することはなく、オイルが電池内部に入り込
むこともない、このような逆止弁をかねた安全弁の機能
は、封口部、切り込みのないチューブ中に単にオイルを
充填した構造では発現しない。By making the safety valve part a small-diameter tube or tubular projection in this way, the electrolyte released from the glass fiber separator is difficult to enter the inside of the tube or tubular projection. The gas will not bleed and corrode the electrical equipment in use, and by making a notch in the small diameter tube or tubular protrusion, the tube or tubular protrusion will bend at the notch as the internal pressure increases, opening the notch and allowing gas to escape. becomes possible. It is possible to easily adjust the valve opening pressure by changing the depth of this cut and the wall thickness of the side surface. Furthermore, the cut end remains closed during steady state and depressurization, so oxygen gas from the atmosphere does not enter the battery, and oil does not enter the battery. The function of a safety valve cannot be achieved by simply filling a tube with oil without a seal or cut.
ここでチューブ材の材質は、フッ素系樹脂、ポリオレフ
ィン系樹脂、スチレン系樹脂、アクリル系樹脂あるいは
変性アクリル系樹脂、塩化ビニル系樹脂、ポリエステル
系樹脂、等チューブ状に加工可能な合成樹脂であればよ
い、また、安全弁部の電槽への接合方法も従来から知ら
れている表面処理剤、粘着剤、接着剤などを用いること
ができる。The material of the tube material here is any synthetic resin that can be processed into a tube shape, such as fluororesin, polyolefin resin, styrene resin, acrylic resin, modified acrylic resin, vinyl chloride resin, polyester resin, etc. Furthermore, the safety valve part can be joined to the battery case using conventionally known surface treatment agents, adhesives, adhesives, etc.
以下、本発明を実施例により具体的に説明する。Hereinafter, the present invention will be specifically explained with reference to Examples.
（実施例１）
第２図において、一方の端に封口部１ｏおよび他方の端
に開口部１１を有するフッ素樹脂製チューブ７にマイク
ロシリンジで一定量のオイル８を封口部１０の近くに充
填した後、ミクロトームでオイル充填部に一定の切り込
み９を設は安全弁を作製した。(Example 1) In FIG. 2, a fluororesin tube 7 having a sealing part 1o at one end and an opening 11 at the other end was filled with a certain amount of oil 8 near the sealing part 10 using a microsyringe. After that, a certain cut 9 was made in the oil filling part using a microtome to prepare a safety valve.
さらに、開口部１１近くのチューブ外側をフッ素樹脂表
面処理剤で表面処理し、電槽材料と接着しやすくさせ、
第１図の安全弁部５のシート間に配置させヒートシーラ
で熱溶着４させた。Furthermore, the outside of the tube near the opening 11 is surface-treated with a fluororesin surface treatment agent to facilitate adhesion to the battery case material.
It was placed between the sheets of the safety valve part 5 shown in FIG. 1 and thermally welded 4 using a heat sealer.
本構造によれば内圧が上昇した時切り込み９からガス排
気が容易にでき、また外圧がかかった場合外気を完全に
遮断でき、開弁圧は２０ｍｍＨｇであった。また、遊離
電解液は小径チューブ中に入ることはなくガス開放時に
電解液は滲まなかった。さらに、小径チューブ中のオイ
ルはその表面張力により極板側へ拡散することはなく、
電池性能を低下させることもなかった。According to this structure, when the internal pressure rose, gas could be easily exhausted from the notch 9, and when external pressure was applied, the outside air could be completely shut off, and the valve opening pressure was 20 mmHg. Furthermore, the free electrolyte did not enter the small diameter tube, and the electrolyte did not leak out when the gas was released. Furthermore, the oil in the small diameter tube does not diffuse toward the electrode plate due to its surface tension.
There was no deterioration in battery performance.
（実施例２）
電装材料である２枚のフィルム基板を突起を有するよう
にあらかじめ切断しておき、この２枚の突起部間に金属
棒を置き、熱溶着させ、冷却後金属棒を引き抜くことに
より封口部ＩＯおよび開口部１１を有するチューブ状突
起の構造を形成させる。(Example 2) Two film substrates, which are electrical equipment materials, are cut in advance to have protrusions, a metal rod is placed between the two protrusions, heat welded, and the metal rod is pulled out after cooling. A structure of a tubular protrusion having a sealing part IO and an opening part 11 is formed by this.
さらに実施例１と同様の方法でオイル８を充填させ、切
り込み９を設けることにより、第３図に示すようにチュ
ーブ状突起を有する安全弁部５をフィルム基板と一体で
作製できる。Furthermore, by filling oil 8 and providing notches 9 in the same manner as in Example 1, the safety valve portion 5 having a tubular projection can be manufactured integrally with the film substrate as shown in FIG.
本構造においても実施例１と同様に内圧が上昇した時の
ガス排気が容易であり、また外圧がかかった場合外気を
完全に遮断でき、開弁圧は２０ｍｍＨｇであった。さら
に、ガス開放時に電解液が滲んだり、電池性能を低下さ
せることもなかっな。In this structure, as in Example 1, it was easy to exhaust gas when the internal pressure rose, and when external pressure was applied, the outside air could be completely shut off, and the valve opening pressure was 20 mmHg. Furthermore, when the gas is released, the electrolyte will not bleed or degrade battery performance.
上記実施例１および２においては、正極板と負極板とが
第１のフィルム基板の同一平面上に配置され、前記正極
板と負極板の間隙には電解質が充填され、前記第１のフ
ィルム基板の上面に前記正極板、負極板および電解質を
覆うように前記第１のフィルム基板と同一の第２のフィ
ルム基板が配置され、前記第１および第２のフィルム基
板の外周を熱シールして密閉構造を形成した、正極板と
負極板が平面上に配置された密閉型二次電池について説
明したが、正極板、負極板は必ずしも平面上に配置され
る必要はなく、正極板、電解質、負極板が高さ方向に配
置された立体的な密閉型二次電池に適用してもよいのは
明らがである。In Examples 1 and 2 above, the positive electrode plate and the negative electrode plate are arranged on the same plane of the first film substrate, the gap between the positive electrode plate and the negative electrode plate is filled with an electrolyte, and the first film substrate A second film substrate, which is the same as the first film substrate, is arranged on the upper surface to cover the positive electrode plate, the negative electrode plate, and the electrolyte, and the outer peripheries of the first and second film substrates are heat-sealed to be airtight. Although we have described a sealed secondary battery in which the positive electrode plate and the negative electrode plate are arranged on a flat surface, the positive electrode plate and the negative electrode plate do not necessarily have to be arranged on a flat surface. It is obvious that the invention may be applied to a three-dimensional sealed secondary battery in which the plates are arranged in the height direction.
（発明の効果）
以上説明したように、本発明によれば電解液が滲んだり
、電池性能を低下させることなく気密良好な密閉型二次
電池を作製できる。(Effects of the Invention) As explained above, according to the present invention, a sealed secondary battery with good airtightness can be produced without electrolyte leakage or deterioration of battery performance.
第１図は密閉型二次電池の平面図、第２図は本発明の実
施例１における密閉型二次電池の安全弁部の斜視図、第
３図は本発明の実施例２における密閉型二次電池の安全
弁部の作製方法を示す斜視図である。
１・・・正極板、２・・・負極板、３・・・電解質およ
びガラス繊維製セパレータ、 ４・・・熱シール部、５
・・・安全弁部、６・・・電槽、７・・・チューブまた
はチューブ状突起、訃・・オイル、９・・・切り込み、
１０・・・封口部、１１・・・開口部。FIG. 1 is a plan view of a sealed secondary battery, FIG. 2 is a perspective view of a safety valve part of a sealed secondary battery in Embodiment 1 of the present invention, and FIG. 3 is a plan view of a sealed secondary battery in Embodiment 2 of the present invention. FIG. 3 is a perspective view showing a method for manufacturing a safety valve portion of a secondary battery. DESCRIPTION OF SYMBOLS 1... Positive electrode plate, 2... Negative electrode plate, 3... Electrolyte and glass fiber separator, 4... Heat sealing part, 5
... Safety valve part, 6 ... Battery case, 7 ... Tube or tubular projection, End ... Oil, 9 ... Notch,
10... Sealing part, 11... Opening part.
Claims (3)
群を覆うように２枚のフィルム基板間に配置して、その
２枚のフィルム基板の外周を熱シールして袋状の密閉構
造を形成した密閉型二次電池において、開口部と封口部
をそれぞれの端に有するチューブまたはチューブ状突起
が側面に切り込みを有する構造の安全弁部を前記熱シー
ル部のシート間に配置することを特徴とする密閉型二次
電池。(1) Arrange between two film substrates so as to cover the electrode group consisting of a positive electrode plate, a negative electrode plate, and an electrolyte, and heat seal the outer periphery of the two film substrates to form a bag-like airtight seal. In the sealed secondary battery having a structure, a safety valve part having a structure in which a tube having an opening and a sealing part at each end or a tubular protrusion has a notch in the side surface is disposed between the sheets of the heat sealing part. Characteristics of sealed secondary batteries.
上に配置され、前記正極板と負極板の間隙には電解質が
充填され、前記第１のフィルム基板の上面に前記正極板
、負極板および電解質を覆うように前記第１のフィルム
基板と同一の第２のフィルム基板が配置され、前記第１
および第２のフィルム基板の外周を熱シールして密閉構
造を形成した密閉型二次電池において、開口部と封口部
をそれぞれの端に有するチューブまたはチューブ状突起
が側面に切り込みを有する構造の安全弁部を前記熱シー
ル部のシート間に配置す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) A positive electrode plate and a negative electrode plate are arranged on the same plane of a first film substrate, the gap between the positive electrode plate and the negative electrode plate is filled with an electrolyte, and the positive electrode plate is placed on the upper surface of the first film substrate, A second film substrate that is the same as the first film substrate is disposed to cover the negative electrode plate and the electrolyte, and
and a safety valve having a structure in which a tube having an opening and a sealing part at each end or a tubular protrusion has a notch in the side surface in a sealed secondary battery in which the outer periphery of a second film substrate is heat-sealed to form a sealed structure. 2. The sealed secondary battery according to claim 1, wherein a portion is disposed between sheets of the heat seal portion.
部にはオイルが充填されていることを特徴とする特許請
求の範囲第１項および第２項記載の密閉型二次電池。(3) The sealed secondary battery according to claims 1 and 2, wherein the inside of the tube or tubular protrusion immediately adjacent to the cut is filled with oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1278437A JPH03141552A (en) | 1989-10-27 | 1989-10-27 | Sealed secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1278437A JPH03141552A (en) | 1989-10-27 | 1989-10-27 | Sealed secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03141552A true JPH03141552A (en) | 1991-06-17 |
Family
ID=17597329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1278437A Pending JPH03141552A (en) | 1989-10-27 | 1989-10-27 | Sealed secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03141552A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022138985A1 (en) * | 2020-12-25 | 2022-06-30 | 大日本印刷株式会社 | Heat sealing film, valve device with heat sealing film, electricity storage device, valve structure for electricity storage device, and method for manufacturing valve structure for electricity storage device |
-
1989
- 1989-10-27 JP JP1278437A patent/JPH03141552A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022138985A1 (en) * | 2020-12-25 | 2022-06-30 | 大日本印刷株式会社 | Heat sealing film, valve device with heat sealing film, electricity storage device, valve structure for electricity storage device, and method for manufacturing valve structure for electricity storage device |
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