JP2005285700A - Seal material of separator for lead acid storage battery, bag-shape separator for lead acid storage battery, and lead acid storage battery - Google Patents
Seal material of separator for lead acid storage battery, bag-shape separator for lead acid storage battery, and lead acid storage battery Download PDFInfo
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
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- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
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- 229920002972 Acrylic fiber Polymers 0.000 description 1
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Classifications
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- 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
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- Secondary Cells (AREA)
Abstract
Description
本発明は、主にガラス繊維からなる無機質材を主体とした不織布状シートからなる鉛蓄電池用セパレータを袋状に加工する鉛蓄電池用セパレータのシール材であって、特に、電解液保持機能を有する鉛蓄電池用セパレータのシール材、該シール材を用いた袋状鉛蓄電池用セパレータ並びに鉛蓄電池に関する。 The present invention is a lead-acid battery separator sealing material for processing a lead-acid battery separator made of a non-woven sheet mainly composed of an inorganic material mainly made of glass fiber into a bag shape, and particularly has an electrolyte solution holding function. The present invention relates to a lead-acid battery separator sealing material, a bag-like lead-acid battery separator using the sealing material, and a lead-acid battery.
自動車用電池に代表される開放型鉛蓄電池では、安価なエキスパンド式極板が主流であり、活物質の脱落による短絡を防止するため、セパレータは袋状にして用いられるのが一般的である。このため、セパレータとしては、熱可塑性樹脂を主体とした多孔質フィルムが一般に用いられ、極板をＵ字状に包み込んだセパレータの両側辺部を超音波溶着や機械的圧着等により帯状にシールするようにしている。
一方、密閉型鉛蓄電池では、鋳造式極板が主流であるが、最近では、安価なエキスパンド式極板を使用する電池も開発されてきている。しかし、密閉型鉛蓄電池のセパレータとしては、電解液保持材としての機能を併せ持つようにするため、主にガラス繊維からなる無機質材を主体とした不織布状シートを用いるのが一般的であり、前述のようなシール方法による袋加工ができない。このため、不織布状シートの両側辺部に接着剤を塗布して重ね合わせ帯状に接着シールする方法が考えられるが、シート自体の剥離強度が低いことから袋加工部で容易に剥離を生じ良好な接着性を得ることができない。このため、特許文献１又は２に開示されるように、主にガラス繊維からなる無機質材を主体とした不織布状シートに４０〜６０質量％程度の有機繊維を配合してセパレータを形成し、前述の多孔質フィルムセパレータのように両側辺部を超音波溶着や機械的圧着等により帯状にシールする方法も提案されているが、この方法では、ガラス繊維等の無機質材に比べて電解液濡れ性の劣る有機繊維を多量に配合することから、セパレータの電解液吸液性や電解液保持性が低下するという問題があった。このため、特許文献３に開示されるように、ガラス繊維のみからなる不織布状シートの両側辺部のみに熱可塑性樹脂の含浸液を含浸付着させてセパレータを形成し、該両側辺部を機械的圧着により帯状にシールする方法も提案されているが、この方法では、セパレータ基材が元々ガラス繊維のみからなる不織布状シートであることから、機械的圧着つまり歯車噛み合わせによる圧着を受けた部位で基材切れを生じ易いという問題があった。
このため、以上のような問題点を解決する方法として、特許文献４には、セパレータとしてガラス繊維のみからなる不織布状シートを用い、該セパレータで極板をＵ字状に包み込んだ状態で、前記セパレータの両側端部と前記極板の両側端面に溶融樹脂を塗布して前記セパレータと前記極板を固定して一体化するようにしたものが開示されている。
また、特許文献５には、セパレータとしてガラス繊維のみからなる不織布状シートを用い、該セパレータで極板をＵ字状に包み込んだ状態で、前記セパレータの両側端部の重なり合った両片を溶融樹脂で被覆して固定・一体化して、セパレータの両側端縁部を狭幅にシールするようにしたものが開示されている。
In an open type lead acid battery represented by an automobile battery, an inexpensive expandable electrode plate is mainly used, and a separator is generally used in a bag shape in order to prevent a short circuit due to dropping of an active material. For this reason, as the separator, a porous film mainly composed of a thermoplastic resin is generally used, and both side portions of the separator enclosing the electrode plate in a U shape are sealed in a band shape by ultrasonic welding, mechanical pressure bonding, or the like. I am doing so.
On the other hand, cast-type electrode plates are the mainstream in sealed lead-acid batteries, but recently, batteries that use inexpensive expandable electrode plates have also been developed. However, as a separator for a sealed lead-acid battery, in order to have a function as an electrolyte solution holding material, it is common to use a nonwoven sheet mainly composed of an inorganic material mainly made of glass fiber. The bag cannot be processed by the sealing method. For this reason, it is conceivable to apply an adhesive to both sides of the non-woven sheet and adhesively seal it in the form of an overlapping band. However, since the peel strength of the sheet itself is low, it is easy to peel off at the bag processing part. Adhesion cannot be obtained. For this reason, as disclosed in Patent Document 1 or 2, a separator is formed by blending about 40 to 60% by mass of organic fibers into a non-woven sheet mainly composed of an inorganic material mainly composed of glass fibers, A method has been proposed in which both sides are sealed in a band shape by ultrasonic welding, mechanical pressure bonding, etc., as in the case of porous film separators, but in this method, the wettability of the electrolyte compared to inorganic materials such as glass fiber Since a large amount of inferior organic fiber is blended, there is a problem that the electrolytic solution absorbability and the electrolytic solution retention of the separator are lowered. For this reason, as disclosed in Patent Document 3, a separator is formed by impregnating and adhering an impregnating solution of a thermoplastic resin only to both sides of a non-woven sheet made of only glass fibers, and the sides are mechanically A method of sealing in a band shape by pressure bonding has also been proposed. However, in this method, since the separator base material is a nonwoven fabric sheet originally made only of glass fibers, it is mechanically pressure-bonded, that is, at a portion subjected to pressure bonding by gear meshing. There was a problem that the substrate was easily cut.
For this reason, as a method for solving the above-mentioned problems, Patent Document 4 uses a non-woven sheet made of only glass fibers as a separator, and the electrode plate is wrapped in a U shape with the separator. There is disclosed a technique in which a molten resin is applied to both end portions of a separator and both end surfaces of the electrode plate, and the separator and the electrode plate are fixed and integrated.
Further, in Patent Document 5, a non-woven sheet made only of glass fibers is used as a separator, and both the overlapping end pieces of both sides of the separator are melted in a state where the electrode plate is wrapped in a U shape with the separator. In this case, the both side edges of the separator are sealed so as to have a narrow width.
しかしながら、前記特許文献４に記載されている鉛蓄電池用複合極板は、セパレータで極板をＵ字状に包み込んだ状態で該セパレータの側端部と該極板の側端面に溶融樹脂を塗布して両者を一体に固定するものであるが、硬化した樹脂が前記極板の側端面側の空間を完全に埋めてしまうため、前記極板の側端面側からは該極板へ電解液が供給されず、電池反応が妨げられ、電池性能が低下するという問題があった。また、セパレータの側端部と極板の側端面を一体に固定しているため、正極板をセパレータで包んで電池を形成した場合には、充放電反応によって起こる正極板の膨張・収縮に対して前記セパレータが対応できず、セパレータが破断するという問題もあった。
また、前記特許文献５に記載されている鉛蓄電池用袋状セパレータは、セパレータで極板をＵ字状に包み込んだ状態で該セパレータの側端部の重なり合った両片を溶融樹脂で被覆して固定・一体化するものであるが、前記特許文献４の場合と異なり、極板の側端面まで樹脂で固めるようにしておらず極板の側端面側の空間は確保されるため、前記極板の側端面側からも該極板へ電解液が供給されるという利点を有する。しかし、不織布状シートセパレータの側端部に対して、溶融状態の樹脂をある程度セパレータ内部に含浸させて被覆しているため、セパレータの樹脂が含浸した部位では、電解液を吸液することができず、セパレータの電解液保持量が低下し、電池性能が低下するという問題があった。
そこで、本発明は、前記問題点に鑑みて、主にガラス繊維からなる無機質材を主体とした不織布状シートからなる鉛蓄電池用セパレータを折り曲げて重なった各側端部をシールして袋状に加工するシール材として、セパレータ形成材料に有機材料を多く含ませなくとも、シール部位で剥離や基材切れを起こさず高い接着強度が得られ、セパレータで包んだ極板への該極板側端面側からの電解液の供給を妨げることがなく、セパレータの電解液吸液性や電解液保持性を低下させることがなく、セパレータで包んだ極板の膨張・収縮によってセパレータが破断することがない良好なシールを行うことのできる鉛蓄電池用セパレータのシール材、該シール材を用いた袋状鉛蓄電池用セパレータ並びに鉛蓄電池を提供することを目的とする。
However, the composite electrode plate for a lead storage battery described in Patent Document 4 applies a molten resin to the side end portion of the separator and the side end surface of the electrode plate in a state where the electrode plate is wrapped in a U shape with a separator. However, since the cured resin completely fills the space on the side end face side of the electrode plate, the electrolyte is supplied to the electrode plate from the side end face side of the electrode plate. There was a problem that the battery was not supplied, the battery reaction was hindered, and the battery performance was lowered. In addition, since the side end of the separator and the side end face of the electrode plate are fixed integrally, when the battery is formed by wrapping the positive electrode plate with the separator, the expansion and contraction of the positive electrode plate caused by the charge / discharge reaction is prevented. In other words, the separator cannot be used, and the separator breaks.
In addition, the lead-acid battery bag-shaped separator described in Patent Document 5 is formed by covering both overlapping pieces of the side edges of the separator with a molten resin in a state where the electrode plate is wrapped in a U-shape with the separator. Although fixed and integrated, unlike the case of Patent Document 4, the electrode plate is not hardened with resin up to the side end surface, and the space on the side end surface side of the electrode plate is secured. There is also an advantage that the electrolyte is supplied to the electrode plate from the side end face side. However, since the molten resin is impregnated to some extent on the side edges of the non-woven sheet separator, the electrolyte solution can be absorbed at the portion of the separator impregnated with the resin. However, there was a problem that the amount of electrolyte retained in the separator was lowered, and the battery performance was lowered.
Therefore, in view of the above-mentioned problems, the present invention seals each side end portion folded and overlapped with a lead-acid battery separator made of a non-woven sheet mainly composed of an inorganic material mainly made of glass fiber to form a bag. Even if the separator forming material does not contain a lot of organic material as the sealing material to be processed, high adhesion strength can be obtained without causing peeling or cutting of the base material at the sealing site, and the electrode plate side end surface to the electrode plate wrapped with the separator The supply of electrolyte from the side is not hindered, the electrolyte absorbability and electrolyte retention of the separator are not lowered, and the separator is not broken by expansion / contraction of the electrode plate wrapped with the separator It is an object of the present invention to provide a lead-acid battery separator sealing material capable of performing good sealing, a bag-like lead-acid battery separator using the seal material, and a lead-acid battery.
本発明の鉛蓄電池用セパレータのシール材は、前記目的を達成するべく、請求項１に記載の通り、主にガラス繊維からなる無機質材を主体とした不織布状シートからなる鉛蓄電池用セパレータを袋状に加工する鉛蓄電池用セパレータのシール材であって、前記シール材が粒子状物と必要に応じて繊維状物とからなる無機材料９５〜１０質量％と、粒子状物と必要に応じて繊維状物とからなる合成樹脂材料５〜９０質量％とからなる材料を分散媒体とともに混練してなるペースト状物であることを特徴とする。
また、請求項２記載の鉛蓄電池用セパレータのシール材は、請求項１記載の鉛蓄電池用セパレータのシール材において、前記無機材料が５０質量％以上、より好ましくは７０質量％以上であることを特徴とする。
また、本発明の袋状鉛蓄電池用セパレータは、前記目的を達成するべく、請求項３に記載の通り、請求項１又は２記載の鉛蓄電池用セパレータのシール材で、Ｕ字状に折り曲げた主にガラス繊維からなる無機質材を主体とした不織布状シートからなる鉛蓄電池用セパレータの重なり合った両側端部を固着してシールしてなり、シールされた部位が多孔質であることを特徴とする。
また、請求項４記載の袋状鉛蓄電池用セパレータは、請求項３記載の袋状鉛蓄電池用セパレータにおいて、主にガラス繊維からなる無機質材を主体とした不織布状シートからなる鉛蓄電池用セパレータをＵ字状に折り曲げ、側辺部が重なり合った状態を維持しながら、その重なり合った側辺部の側面側から前記シール材を塗り込み、該シール材を乾燥後あるいは乾燥と同時に、該シール材に含まれる前記粒子状合成樹脂材料が粒子形状を維持しつつ粒子表面が軟化あるいは溶融する温度にて所定時間加熱処理してなることを特徴とする。
また、請求項５記載の袋状鉛蓄電池用セパレータは、請求項３又は４記載の袋状鉛蓄電池用セパレータにおいて、前記不織布状シートは無機質材が９０質量％以上であることを特徴とする。
また、請求項６記載の袋状鉛蓄電池用セパレータは、請求項３乃至５の何れかに記載の袋状鉛蓄電池用セパレータにおいて、前記鉛蓄電池用セパレータが密閉型鉛蓄電池用セパレータであることを特徴とする。
また、本発明の鉛蓄電池は、前記目的を達成するべく、請求項７に記載の通り、請求項３乃至６の何れかに記載の袋状鉛蓄電池用セパレータを用いたことを特徴とする。
In order to achieve the above object, the sealing material for a lead-acid battery separator according to the present invention is a bag for a lead-acid battery separator made of a non-woven sheet mainly composed of an inorganic material mainly made of glass fibers. 95 to 10% by mass of an inorganic material composed of a particulate matter and, if necessary, a fibrous material, and a particulate matter and if necessary, It is characterized by being a paste-like material formed by kneading a material consisting of 5 to 90% by mass of a synthetic resin material consisting of a fibrous material together with a dispersion medium.
Moreover, the sealing material of the lead-acid battery separator according to claim 2 is the sealing material of the lead-acid battery separator according to claim 1, wherein the inorganic material is 50% by mass or more, more preferably 70% by mass or more. Features.
Moreover, the bag-shaped lead-acid battery separator of the present invention is folded in a U-shape with the lead-acid battery separator sealing material according to claim 1 or 2, as described in claim 3, in order to achieve the object. The lead-acid battery separator made of a non-woven sheet mainly composed of an inorganic material mainly made of glass fiber is adhered and sealed on both sides, and the sealed part is porous. .
A separator for a bag-like lead storage battery according to claim 4 is a separator for a bag-like lead storage battery according to claim 3, wherein the separator for a lead storage battery is a nonwoven sheet mainly composed of an inorganic material mainly made of glass fiber. Bending into a U shape and maintaining the state where the side portions overlap each other, the sealing material is applied from the side surface side of the overlapping side portions, and the sealing material is applied to the sealing material after or simultaneously with drying. The particulate synthetic resin material contained is heat-treated for a predetermined time at a temperature at which the particle surface softens or melts while maintaining the particle shape.
Moreover, the separator for bag-shaped lead acid batteries of Claim 5 is a separator for bag-shaped lead acid batteries of Claim 3 or 4, The inorganic material is 90 mass% or more in the said nonwoven fabric sheet, It is characterized by the above-mentioned.
The bag-shaped lead-acid battery separator according to claim 6 is the bag-shaped lead-acid battery separator according to any one of claims 3 to 5, wherein the lead-acid battery separator is a sealed lead-acid battery separator. Features.
Moreover, in order to achieve the object, the lead storage battery of the present invention uses the bag-like lead storage battery separator according to any one of claims 3 to 6 as described in claim 7.
本発明の鉛蓄電池用セパレータのシール材は、粒子状物と必要に応じて繊維状物とからなる無機材料９５〜１０質量％と、粒子状物と必要に応じて繊維状物とからなる合成樹脂材料５〜９０質量％とからなる材料を分散媒体とともに混練してなるペースト状物であるため、このシール材を、Ｕ字状に折り曲げた主にガラス繊維からなる無機質材を主体とした不織布状シートからなる鉛蓄電池用セパレータの側面に塗り込んで乾燥・固化させれば、シール部が多孔質となる袋状鉛蓄電池用セパレータが容易に得られる。
前記シール材に含まれる無機材料が５０質量％以上、特に７０質量％以上である場合は、該シール材を用いて袋加工した袋状鉛蓄電池用セパレータのシール部の電解液濡れ性を良好にすることができるので、前記シール材を用いて袋加工された袋状鉛蓄電池用セパレータは、シール部の電解液保持性及び電解液イオン透過性が良好となる利点を有する。
本発明の袋状鉛蓄電池用セパレータによれば、前記特許文献５に記載されたシール材の施工方法についてはほぼこの方法を踏襲することにより、前記特許文献５の鉛蓄電池用袋状セパレータの有する前記文献に記載された効果をすべて有しつつ、更に、シール材の構成材料の材質及び構造を見直すことにより、袋状鉛蓄電池用セパレータのシール部を多孔質かつ電解液濡れ性が良好かつ高柔軟性（高弾力性）にできるという新たな効果を付加した、更に優れた袋状鉛蓄電池用セパレータへと発展させることができた。
本発明のシール材を用いて袋加工した袋状鉛蓄電池用セパレータは、従来のシール材を用いて袋加工した袋状鉛蓄電池用セパレータと異なり、セパレータのシール部が、多孔質を維持しているとともに、電解液濡れ性も良好であるため、シール部に電解液を吸液することができ、シール部における電解液保持性が良好で、シール部の電解液イオン透過性も良好であり、前記セパレータのシール部は、シール部以外の部位同様に、鉛蓄電池用セパレータ、特に密閉型鉛蓄電池用セパレータとしての機能を十分に発揮して電池反応に寄与し得るものであり、しかも、従来のシール材を用いて袋加工した袋状鉛蓄電池用セパレータと何ら遜色のない高いシール強度が得られることから、このセパレータを鉛蓄電池、特に密閉型鉛蓄電池に適用した場合には、電池性能（寿命性能）の大幅な改善をもたらす。
The sealing material for the lead-acid battery separator of the present invention is composed of 95 to 10% by mass of an inorganic material composed of particulate matter and, if necessary, fibrous material, and a composition composed of particulate matter and, if necessary, fibrous material. A non-woven fabric mainly composed of an inorganic material mainly composed of glass fibers, in which this sealing material is bent into a U-shape because it is a paste-like material kneaded with a dispersion medium of a material comprising 5 to 90% by mass of a resin material If it is applied to the side surface of a lead-acid battery separator made of a sheet and dried and solidified, a bag-like lead-acid battery separator with a porous seal portion can be easily obtained.
When the inorganic material contained in the sealing material is 50% by mass or more, particularly 70% by mass or more, the electrolyte solution wettability of the sealing part of the bag-shaped lead-acid battery separator bag-processed using the sealing material is improved. Therefore, the bag-shaped lead-acid battery separator bag-processed using the sealing material has the advantage that the electrolyte solution retainability and the electrolyte ion permeability of the seal portion are good.
According to the bag-shaped lead-acid battery separator of the present invention, the bag-shaped separator for lead-acid battery of Patent Document 5 has the construction method of the sealing material described in Patent Document 5 almost following this method. While having all the effects described in the above-mentioned document, the seal part of the bag-shaped lead-acid battery separator is porous and has good electrolyte wettability by reviewing the material and structure of the constituent material of the seal material. It was possible to develop a more excellent separator for a bag-like lead-acid battery, to which a new effect of being flexible (high elasticity) was added.
The bag-shaped lead-acid battery separator bag-processed using the sealing material of the present invention is different from the bag-shaped lead-acid battery separator bag-processed using the conventional seal material, and the separator seal portion maintains the porosity. In addition, since the electrolyte solution wettability is also good, the electrolyte solution can be absorbed into the seal part, the electrolyte solution retention in the seal part is good, and the electrolyte ion permeability of the seal part is also good, The seal part of the separator, like the parts other than the seal part, can fully exert the function as a separator for lead-acid batteries, particularly a sealed lead-acid battery separator, and contribute to the battery reaction. This separator can be applied to lead-acid batteries, especially sealed lead-acid batteries, because it has a high sealing strength comparable to that of bag-shaped lead-acid battery separators that have been bag-processed using a sealing material. The results in a significant improvement in battery performance (life performance).
本発明の鉛蓄電池用セパレータのシール材は、主にガラス繊維からなる無機質材を主体とした不織布状シート、特に前記無機質材が９０質量％以上で構成される不織布状シートからなる鉛蓄電池用セパレータを、袋状に加工する袋加工用のシール材であり、本発明の袋状鉛蓄電池用セパレータは、主にガラス繊維からなる無機質材を主体とした不織布状シート、特に前記無機質材が９０質量％以上で構成される不織布状シートからなる鉛蓄電池用セパレータを、Ｕ字状に折り曲げてその両側端部で前記シール材を用いて固着・シールしてなる袋状セパレータである。
本発明の鉛蓄電池用セパレータのシール材は、粒子状物と必要に応じて繊維状物とからなる無機材料９５〜１０質量％と、粒子状物と必要に応じて繊維状物とからなる合成樹脂材料５〜９０質量％とからなる材料を、例えば、水、アルコール等の分散媒体に分散し、脱気しながら均一に混練して、ペースト状物としたものである。
前記無機材料を主体とする場合（前記無機材料の比率が５０質量％を超える場合）は、前記合成樹脂材料として、前記無機材料の平均粒子径よりも小さい平均粒子径を有する合成樹脂材料を使用し、前記無機材料同士の隙間の空間に前記合成樹脂材料が介在した形で、施工後の加熱乾燥あるいは加熱処理により、前記無機材料が前記合成樹脂材料のバインダ効果により結合され、前記無機材料同士の接触により多孔質化したシール部を形成することができる。
また、前記合成樹脂材料を主体とする場合（前記合成樹脂材料の比率が５０質量％を超える場合）で前記無機材料として無機粉体を使用する場合は、前記合成樹脂材料として、前記無機粉体の平均粒子径とほぼ同等の平均粒子径を有する合成樹脂材料を使用し、施工後の加熱乾燥あるいは加熱処理により、前記無機粉体と前記合成樹脂材料とが結合され、これら材料同士の接触により多孔質化したシール部を形成することができる。
また、前記合成樹脂材料を主体とする場合（前記合成樹脂材料の比率が５０質量％を超える場合）で前記無機材料として無機ゾルを使用する場合は、前記合成樹脂材料として、前記無機ゾルの平均粒子径よりも大きい平均粒子径を有する合成樹脂材料を使用し、前記合成樹脂材料同士の隙間の空間に前記無機ゾルが介在した形で、施工後の加熱乾燥あるいは加熱処理により、前記合成樹脂材料同士が結合され、前記合成樹脂材料同士の接触により多孔質化したシール部を形成することができる。
前記シール材は、前記無機材料が５０質量％以上、特に７０質量％以上である場合は、前記シール材の施工部位（シール部）の電解液濡れ性が良好となり、また、前記シール部の多孔質性が高まり、前記シール部の電解液保持性及び電解液イオン透過性が向上するため好ましい。
前記ペースト状物の粘度が５００〜７０００ｍＰａ・ｓである場合は、塗布しやすく、鉛蓄電池用セパレータのシール材として好適である。このペースト状物の粘度が低い場合は、ＣＭＣ等の増粘剤を少量添加するとよい。
The sealing material for the lead-acid battery separator of the present invention is a non-woven sheet mainly composed of an inorganic material mainly composed of glass fibers, particularly a lead-acid battery separator comprising a non-woven sheet in which the inorganic material is composed of 90% by mass or more. The bag-like lead-acid battery separator of the present invention is a non-woven sheet mainly composed of an inorganic material mainly composed of glass fibers, particularly 90 mass of the inorganic material. % Is a bag-like separator formed by folding a lead-acid battery separator made of a non-woven sheet composed of% or more into a U-shape and fixing and sealing at both end portions thereof using the sealing material.
The sealing material for the lead-acid battery separator of the present invention is composed of 95 to 10% by mass of an inorganic material composed of particulate matter and, if necessary, fibrous material, and a composition composed of particulate matter and, if necessary, fibrous material. A material composed of 5 to 90% by mass of a resin material is dispersed in a dispersion medium such as water or alcohol, and kneaded uniformly while degassing to obtain a paste.
When the inorganic material is the main component (when the ratio of the inorganic material exceeds 50% by mass), a synthetic resin material having an average particle size smaller than the average particle size of the inorganic material is used as the synthetic resin material. Then, the inorganic resin is bonded by the binder effect of the synthetic resin material by heat drying or heat treatment after construction in a form in which the synthetic resin material is interposed in the gap space between the inorganic materials, Thus, a porous seal portion can be formed.
Moreover, when using the said synthetic resin material as a main component (when the ratio of the said synthetic resin material exceeds 50 mass%) and using inorganic powder as said inorganic material, as said synthetic resin material, the said inorganic powder A synthetic resin material having an average particle diameter substantially equal to the average particle diameter of the inorganic powder and the synthetic resin material are combined by heat drying or heat treatment after construction, and contact between these materials A porous seal portion can be formed.
Further, when an inorganic sol is used as the inorganic material when the synthetic resin material is a main component (when the ratio of the synthetic resin material exceeds 50% by mass), the average of the inorganic sol is used as the synthetic resin material. A synthetic resin material having an average particle diameter larger than the particle diameter is used, and the synthetic sol material is formed by heat drying or heat treatment after construction in a form in which the inorganic sol is interposed in a space between the synthetic resin materials. They are bonded to each other, and a porous seal portion can be formed by contact between the synthetic resin materials.
When the inorganic material is 50% by mass or more, particularly 70% by mass or more, the sealing material has good electrolyte wettability at the site where the sealing material is applied (seal part), and the sealing part has a porous structure. It is preferable because the quality is improved and the electrolyte solution retention and electrolyte ion permeability of the seal portion are improved.
When the paste has a viscosity of 500 to 7000 mPa · s, it is easy to apply and is suitable as a sealing material for a lead-acid battery separator. If the viscosity of the paste is low, a small amount of thickener such as CMC may be added.
前記無機材料としては、粒子状無機材料と必要に応じて繊維状無機材料が使用される。前記粒子状無機材料としては、無機粉体又は／及び無機ゾルが使用できる。前記無機粉体としては、シリカ粉末、珪藻土、ガラス粉末等が使用できる。前記無機ゾルとしては、シリカゾル、アルミナゾル、チタニアゾル等が使用できる。
尚、前記無機材料の配合比率が高い場合は、前記合成樹脂材料によるバインダ効果が低くなるので、前記無機材料として、固結性のある無機粉体、例えば、セピオライト、珪藻土等を使用することにより、シール材の施工部位（シール部）のシール強度の低下を補うことができる。
As the inorganic material, a particulate inorganic material and, if necessary, a fibrous inorganic material are used. As the particulate inorganic material, inorganic powder and / or inorganic sol can be used. As the inorganic powder, silica powder, diatomaceous earth, glass powder and the like can be used. As the inorganic sol, silica sol, alumina sol, titania sol and the like can be used.
In addition, when the blending ratio of the inorganic material is high, the binder effect by the synthetic resin material is low. Therefore, by using a solidified inorganic powder such as sepiolite or diatomaceous earth as the inorganic material. It is possible to compensate for a decrease in the sealing strength of the construction site (seal part) of the sealing material.
前記合成樹脂材料としては、粒子状合成樹脂材料と必要に応じて繊維状合成樹脂材料が使用される。前記合成樹脂材料が熱硬化性樹脂からなる場合は、シール材の施工部位（シール部）のシール強度が向上するため好ましい。前記熱硬化性樹脂としては、アクリル系樹脂、フェノール系樹脂等が使用できる。 As the synthetic resin material, a particulate synthetic resin material and, if necessary, a fibrous synthetic resin material are used. When the synthetic resin material is made of a thermosetting resin, it is preferable because the sealing strength of the construction part (seal part) of the sealing material is improved. As the thermosetting resin, an acrylic resin, a phenol resin, or the like can be used.
また、前記合成樹脂材料が熱可塑性樹脂からなる場合は、シール材によって袋加工された袋状セパレータのシール部が弾力性や柔軟性を有し、該袋状セパレータ内に収容した極板の膨張・収縮に追従して伸縮し、セパレータが破断しにくくなるため、好ましい。尚、前記合成樹脂材料が熱可塑性樹脂のみからなる場合は、シール材の施工部位（シール部）のシール強度が低下するため、前記熱硬化性樹脂を併用することが好ましい。
前記熱可塑性樹脂としては、ポリオレフィン系エマルジョン樹脂、ポリオレフィン系樹脂粉体、ポリオレフィン系マイクロカプセル、アクリル系樹脂マイクロカプセル等が使用できる。尚、前記マイクロカプセルは、発泡性のものを使用してもよい。
Further, when the synthetic resin material is made of a thermoplastic resin, the sealing portion of the bag-shaped separator bag-processed by the sealing material has elasticity and flexibility, and the electrode plate accommodated in the bag-shaped separator is expanded. -It is preferable because it expands and contracts following the contraction and the separator is less likely to break. In addition, when the said synthetic resin material consists only of a thermoplastic resin, since the sealing strength of the construction site | part (seal part) of a sealing material falls, it is preferable to use the said thermosetting resin together.
As the thermoplastic resin, polyolefin emulsion resin, polyolefin resin powder, polyolefin microcapsule, acrylic resin microcapsule and the like can be used. The microcapsules may be foamable.
また、前記シール材に繊維状物、つまり、前記繊維状無機材料や前記繊維状合成樹脂材料が含まれる場合は、前記繊維状物が補強材となり、シール部分のひび割れを防止することができるため、好ましい。前記繊維状無機材料としては、ガラス繊維、ウィスカ、ガラスフレーク、無機フレーク等が使用できる。前記繊維状合成樹脂材料としては、アクリル繊維、パルプ繊維、ポリオレフィン系繊維、ポリエステル系繊維等が使用できる。 In addition, when the sealing material includes a fibrous material, that is, the fibrous inorganic material or the fibrous synthetic resin material, the fibrous material serves as a reinforcing material and can prevent cracking of the sealing portion. ,preferable. As the fibrous inorganic material, glass fiber, whisker, glass flake, inorganic flake and the like can be used. As the fibrous synthetic resin material, acrylic fiber, pulp fiber, polyolefin fiber, polyester fiber and the like can be used.
前記シール材を用いて本発明の袋状鉛蓄電池用セパレータを得るには、例えば、主にガラス繊維からなる無機質材を主体とした不織布状シートからなる鉛蓄電池用セパレータをＵ字状に折り曲げ、側辺部が重なり合った状態を維持しながら、その重なり合った側辺部の側面側から前記シール材を塗り込み、該シール材を乾燥後あるいは乾燥と同時に、該シール材に含まれる前記粒子状合成樹脂材料が粒子形状を維持しつつ粒子表面が軟化あるいは溶融する温度にて所定時間加熱処理すれば、本発明の袋状鉛蓄電池用セパレータを得ることができる。
尚、前記袋状鉛蓄電池用セパレータを得る際、Ｕ字状に折り曲げた前記セパレータの間に極板を挟むようにすれば、セパレータの袋加工と同時に極板の包装加工を行うことも可能である。
また、例えば、正極板をＵ字状に包んだセパレータと負極板を交互に積層して極群を形成し、該極群を型に固定して該型内に前記シール材を流し込み、所定の温度で加熱乾燥（あるいは乾燥後に加熱処理）させて前記セパレータの側面を前述同様にシールするようにすれば、更に効率がよい。
In order to obtain the bag-shaped lead-acid battery separator of the present invention using the sealing material, for example, a lead-acid battery separator made of a non-woven sheet mainly composed of an inorganic material mainly made of glass fiber is bent into a U-shape, While maintaining the state where the side portions overlap, the sealing material is applied from the side surface side of the overlapping side portions, and the particulate composite contained in the sealing material is dried or simultaneously with drying. If the resin material is heat-treated at a temperature at which the particle surface softens or melts while maintaining the particle shape, the bag-shaped lead-acid battery separator of the present invention can be obtained.
If the electrode plate is sandwiched between the U-shaped separators when obtaining the bag-shaped lead-acid battery separator, the electrode plate can be packaged simultaneously with the separator bag processing. is there.
Further, for example, a pole group is formed by alternately laminating separators and negative electrode plates each enclosing a positive electrode plate in a U-shape, fixing the pole group to a mold, and pouring the sealing material into the mold, If the side surface of the separator is sealed in the same manner as described above by heat drying at a temperature (or heat treatment after drying), the efficiency is further improved.
（実施例１）
粒子状無機材料としてシリカ粉末８０質量％と、粒子状合成樹脂材料として熱硬化性樹脂であるアクリル樹脂２０質量％とからなる材料１００質量部を、水４００質量部に分散させて、脱気しながら均一に混練し、粘度６５００ｍＰａ・ｓのペースト状物である鉛蓄電池用セパレータのシール材を得た。
平均繊維径０．７μｍのガラス繊維１００質量％からなる湿式抄造により得た不織布状シートからなる密閉型鉛蓄電池用セパレータを正極板を挟んでＵ字状に折り曲げ、側辺部が重なり合った状態を維持しながら、その重なり合った側辺部の側面側から前記シール材を塗り込み、１４０℃で２０分間加熱乾燥させて、内部に正極板を収容した袋状密閉型鉛蓄電池用セパレータを得た。
前記正極板を収容した袋状密閉型鉛蓄電池用セパレータと負極板を交互に積層して極群を形成し、該極群を電槽内に一定の加圧かけて組み込んだ後、電解液を注入して密閉型鉛蓄電池を得た。
(Example 1)
100 parts by mass of a material composed of 80% by mass of silica powder as a particulate inorganic material and 20% by mass of an acrylic resin that is a thermosetting resin as a particulate synthetic resin material is dispersed in 400 parts by mass of water and deaerated. The resulting mixture was uniformly kneaded to obtain a sealant for a lead-acid battery separator, which was a paste with a viscosity of 6500 mPa · s.
A separator for a sealed lead-acid battery made of a non-woven sheet obtained by wet paper-making made of 100% by mass of glass fibers having an average fiber diameter of 0.7 μm is folded in a U shape with the positive electrode plate sandwiched, and the side portions overlap each other. While maintaining, the sealing material was applied from the side surface side of the overlapped side portion and dried by heating at 140 ° C. for 20 minutes to obtain a bag-shaped sealed lead-acid battery separator containing a positive electrode plate inside.
A bag-shaped sealed lead-acid battery separator containing the positive electrode plate and a negative electrode plate are alternately laminated to form a pole group. The sealed lead-acid battery was obtained by injection.
（実施例２）
粒子状無機材料としてシリカ粉末６０質量％と、繊維状無機材料としてガラス繊維１５質量％と、粒子状合成樹脂材料として熱硬化性樹脂であるアクリル樹脂１５質量％と、粒子状合成樹脂材料として熱可塑性樹脂であるポリエチレン粉体１０質量％とからなる材料１００質量部を、水３５０質量部に分散させて、脱気しながら均一に混練し、粘度４０００ｍＰａ・ｓのペースト状物である鉛蓄電池用セパレータのシール材を得た。
前記シール材を用いて実施例１と同様にして袋状密閉型鉛蓄電池用セパレータ及び密閉型鉛蓄電池を得た。
(Example 2)
Silica powder 60% by mass as particulate inorganic material, glass fiber 15% by mass as fibrous inorganic material, acrylic resin 15% by mass as thermosetting resin as particulate synthetic resin material, and heat as particulate synthetic resin material 100 parts by mass of a material composed of 10% by mass of polyethylene powder, which is a plastic resin, is dispersed in 350 parts by mass of water and uniformly kneaded while degassing, for a lead storage battery having a viscosity of 4000 mPa · s. A separator sealing material was obtained.
Using the sealing material, a bag-shaped sealed lead-acid battery separator and a sealed lead-acid battery were obtained in the same manner as in Example 1.
（実施例３）
粒子状無機材料としてシリカ粉末５０質量％と、繊維状無機材料としてガラス繊維１質量％と、粒子状合成樹脂材料として熱硬化性樹脂であるアクリルエマルジョン樹脂１０質量％と、粒子状合成樹脂材料として熱可塑性樹脂であるポリエチレン粉体３９質量％とからなる材料１００質量部を、水２５０質量部に分散させて、脱気しながら均一に混練し、粘度２０００ｍＰａ・ｓのペースト状物である鉛蓄電池用セパレータのシール材を得た。
前記シール材を用いて実施例１と同様にして袋状密閉型鉛蓄電池用セパレータ及び密閉型鉛蓄電池を得た。
(Example 3)
Silica powder 50% by mass as particulate inorganic material, glass fiber 1% by mass as fibrous inorganic material, acrylic emulsion resin 10% by mass as thermosetting resin as particulate synthetic resin material, and particulate synthetic resin material 100 parts by mass of a material composed of 39% by mass of polyethylene powder, which is a thermoplastic resin, is dispersed in 250 parts by mass of water and uniformly kneaded while degassing, and is a lead-acid battery that is a pasty product having a viscosity of 2000 mPa · s. A separator sealing material was obtained.
Using the sealing material, a bag-shaped sealed lead-acid battery separator and a sealed lead-acid battery were obtained in the same manner as in Example 1.
（実施例４）
粒子状無機材料としてシリカ粉末１９質量％と、粒子状無機材料としてシリカゾル５質量％と、繊維状無機材料としてガラス繊維１質量％と、粒子状合成樹脂材料として熱硬化性樹脂であるアクリルエマルジョン樹脂５質量％と、粒子状合成樹脂材料として熱可塑性樹脂であるポリエチレン粉体７０質量％とからなる材料１００質量部を、水１５０質量部に分散させて、脱気しながら均一に混練し、粘度７００ｍＰａ・ｓのペースト状物である鉛蓄電池用セパレータのシール材を得た。
前記シール材を用いて実施例１と同様にして袋状密閉型鉛蓄電池用セパレータ及び密閉型鉛蓄電池を得た。
Example 4
Silica powder 19% by mass as particulate inorganic material, 5% by mass of silica sol as particulate inorganic material, 1% by mass of glass fiber as fibrous inorganic material, and acrylic emulsion resin which is thermosetting resin as particulate synthetic resin material 100 parts by mass of a material consisting of 5% by mass and 70% by mass of polyethylene powder, which is a thermoplastic resin as a particulate synthetic resin material, is dispersed in 150 parts by mass of water and uniformly kneaded while degassing to obtain a viscosity. A separator for a lead-acid battery separator, which was a paste of 700 mPa · s, was obtained.
Using the sealing material, a bag-shaped sealed lead-acid battery separator and a sealed lead-acid battery were obtained in the same manner as in Example 1.
（比較例１）
軟化点１２０℃のオレフィン系ホットメルト接着剤を１８０℃に加温した樹脂槽を用意し、平均繊維径０．７μｍのガラス繊維１００質量％からなる湿式抄造により得た不織布状シートからなる密閉型鉛蓄電池用セパレータを正極板を挟んでＵ字状に折り曲げ、側端部が重なり合った状態を維持しながら、各側端部を前記樹脂槽に１ｍｍ幅分だけ浸漬して引き上げ、冷却して、前記接着剤を固化させて、内部に正極板を収容した袋状密閉型鉛蓄電池用セパレータを得た。
前記袋状密閉型鉛蓄電池用セパレータを用いて実施例１と同様にして密閉型鉛蓄電池を得た。
(Comparative Example 1)
A sealed tank made of a non-woven sheet obtained by wet papermaking consisting of 100% by mass of glass fibers having an average fiber diameter of 0.7 μm is prepared by preparing a resin tank in which an olefinic hot melt adhesive having a softening point of 120 ° C. is heated to 180 ° C. Bending the lead-acid battery separator in a U shape with the positive electrode sandwiched, maintaining the state where the side ends overlap each other, immerse each side end in the resin tank by a 1 mm width, cool, The adhesive was solidified to obtain a bag-shaped sealed lead-acid battery separator containing a positive electrode plate inside.
A sealed lead-acid battery was obtained in the same manner as in Example 1 using the bag-shaped sealed lead-acid battery separator.
（比較例２）
平均繊維径０．７μｍのガラス繊維１００質量％からなる湿式抄造により得た不織布状シートからなる密閉型鉛蓄電池用セパレータで正極板をＵ字状に包んだ後、１７０℃で溶融したポリプロピレン樹脂を、Ｕ字状に折り曲げられた前記セパレータの各側端部とそれに挟まれた前記正極板の各側端面にそれぞれ塗布し、固化させて、前記セパレータの側端部とそれに挟まれた前記正極板の端面が接着一体化された、内部に正極板を収容した袋状密閉型鉛蓄電池用セパレータを得た。
前記袋状密閉型鉛蓄電池用セパレータを用いて実施例１と同様にして密閉型鉛蓄電池を得た。
(Comparative Example 2)
After wrapping the positive electrode plate in a U-shape with a separator for a sealed lead-acid battery made of a nonwoven sheet obtained by wet papermaking consisting of 100% by mass of glass fibers having an average fiber diameter of 0.7 μm, a polypropylene resin melted at 170 ° C. Each of the side ends of the separator folded in a U-shape and each side end surface of the positive electrode plate sandwiched between the separators and solidified to be solidified, and the positive electrode plate sandwiched between the side end portions of the separator Thus, a bag-shaped sealed lead-acid battery separator with a positive electrode plate accommodated therein was obtained.
A sealed lead-acid battery was obtained in the same manner as in Example 1 using the bag-shaped sealed lead-acid battery separator.
次に、上記にて得られた実施例１〜４及び比較例１〜２の各袋状密閉型鉛蓄電池用セパレータについて、シール部のシール性、シール部の平均孔径、シール部の吸液性、シール部の電気抵抗を測定した。結果を表１に示す。
試験方法については以下のようにした。
［シール部のシール強度］
シール部を引き剥がし、シール部のシール強度を確認した。
［シール部の吸液性］
シール部にスポイトにて数滴の水を滴下し、水滴が浸透するかを確認した。
［シール部の電気抵抗］
ＳＢＡ Ｓ ０４０２に準拠した方法により測定した。
Next, for each of the bag-shaped sealed lead-acid battery separators of Examples 1 to 4 and Comparative Examples 1 and 2 obtained above, the sealing property of the seal part, the average pore diameter of the seal part, and the liquid absorbency of the seal part The electrical resistance of the seal part was measured. The results are shown in Table 1.
The test method was as follows.
[Seal strength of seal part]
The seal part was peeled off, and the seal strength of the seal part was confirmed.
[Liquid absorption of seal part]
A few drops of water were dropped onto the seal portion with a dropper, and it was confirmed whether the water drops penetrated.
[Electric resistance of seal part]
It measured by the method based on SBA S0402.
前記表１に示す結果から以下のことが分かった。
（１）実施例１〜４のシール材を用いて袋加工した袋状密閉型鉛蓄電池用セパレータでは、何れも、シール部のシール強度が良好で、溶融樹脂のような接着材をシール材とした比較例１〜２の袋状密閉型鉛蓄電池用セパレータと比べても遜色のない高いシール強度が得られることが確認できた。
（２）実施例１〜４のシール材を用いて袋加工した袋状密閉型鉛蓄電池用セパレータでは、何れも、シール部の平均孔径が測定でき、シール部が多孔質であることが確認できた。これに対し、比較例１〜２の袋状密閉型鉛蓄電池用セパレータでは、シール部の平均孔径が測定できず、シール部が多孔質となっていなかった。
（３）実施例１〜４のシール材を用いて袋加工した袋状密閉型鉛蓄電池用セパレータでは、何れも、シール部に水が浸透し、シール部の吸液性が良好であることが確認できた。これに対し、比較例１〜２の袋状密閉型鉛蓄電池用セパレータでは、シール部にまったく水が浸透せず、シール部が吸液性を有していなかった。
（４）実施例１〜２のシール材を用いて袋加工した袋状密閉型鉛蓄電池用セパレータでは、シール部の電気抵抗が０．００６０Ω・１００ｃｍ2／ｍｍ以下であり、シール部においても良好な電解液イオン透過性を有していることが確認できた。また、実施例３〜４のシール材を用いて袋加工した袋状密閉型鉛蓄電池用セパレータでは、実施例１〜２に比べると、電解液濡れ性の良好なシリカ粉末やガラス繊維の配合量を減らし、代わりに電解液濡れ性の劣るポリエチレン粉体を多く配合してシール材を形成した分、シール部の電気抵抗が０．０１２０〜０．０２００Ω・１００ｃｍ2／ｍｍとやや高いものの、シール部が電解液イオン透過性を有することが確認できた。これに対し、比較例１〜２の袋状密閉型鉛蓄電池用セパレータでは、シール部の電気抵抗が測定不能で、シール部が電解液イオン透過性を有していなかった。尚、前記実施例３〜４の袋状密閉型鉛蓄電池用セパレータのように、シール材に含まれる無機材料の比率が少なく、シール部の電解液濡れ性が良好でない場合は、前記シール材に適量の浸透剤（例えば、界面活性剤）を配合するようにすれば、シール部の電解液濡れ性を改善できる。
（５）実施例１〜２のシール材を用いて袋加工した袋状密閉型鉛蓄電池用セパレータを用いた密閉型鉛蓄電池では、電池特性（寿命性能）が、比較例１〜２の袋状密閉型鉛蓄電池用セパレータを用いた密閉型鉛蓄電池に比べ３０％向上することが確認できた。また、実施例３〜４のシール材を用いて袋加工した袋状密閉型鉛蓄電池用セパレータを用いた密閉型鉛蓄電池においても、比較例１〜２に比べ１０〜２０％向上することが確認できた。
（６）以上から、本発明のシール材を用いて袋加工した袋状密閉型鉛蓄電池用セパレータにあっては、従来のシール材を用いて袋加工した袋状密閉型鉛蓄電池用セパレータと大きく異なり、セパレータの袋加工部つまりシール部が多孔質を維持しており、シール部に電解液を吸液することができ、シール部における電解液保持性が良好で、シール部の電解液イオン透過性も良好であり、該セパレータのシール部は、シール部以外の部位同様に、密閉型鉛蓄電池用セパレータとしての機能を十分に発揮して電池反応に寄与し得るものであり、しかも、従来のシール材を用いて袋加工した袋状密閉型鉛蓄電池用セパレータと何ら遜色のない高いシール強度が得られることが確認できた。
From the results shown in Table 1, the following was found.
(1) In the bag-shaped sealed lead-acid battery separator bag-processed using the sealing material of Examples 1 to 4, the seal strength of the seal portion is good, and an adhesive such as a molten resin is used as the sealing material. It was confirmed that even when compared with the bag-shaped sealed lead-acid battery separators of Comparative Examples 1 and 2, a high sealing strength comparable to that obtained was obtained.
(2) In the bag-shaped sealed lead-acid battery separator bag-processed using the sealing material of Examples 1 to 4, the average pore diameter of the seal portion can be measured and it can be confirmed that the seal portion is porous. It was. On the other hand, in the bag-shaped sealed lead-acid battery separators of Comparative Examples 1 and 2, the average pore diameter of the seal portion could not be measured, and the seal portion was not porous.
(3) In each of the bag-shaped sealed lead-acid battery separators bag-processed using the sealing materials of Examples 1 to 4, water penetrates into the seal portion, and the liquid absorbency of the seal portion is good. It could be confirmed. On the other hand, in the bag-shaped sealed lead-acid battery separators of Comparative Examples 1 and 2, water did not penetrate into the seal portion at all, and the seal portion did not have liquid absorbency.
(4) In the bag-shaped sealed lead-acid battery separator bag-processed using the sealing material of Examples 1 and 2, the electrical resistance of the seal portion is 0.0060Ω · 100 cm 2 / mm or less, and the seal portion is also good. It was confirmed that the electrolyte had excellent ion permeability. Moreover, in the bag-shaped sealed lead-acid battery separator bag-processed using the sealing material of Examples 3 to 4, the amount of silica powder or glass fiber having good electrolyte wettability compared to Examples 1 and 2 Instead, the amount of polyethylene powder with poor electrolyte wettability is blended to form a sealing material, so the electrical resistance of the sealing part is slightly higher, 0.0120 to 0.0200Ω · 100 cm 2 / mm, but the seal It was confirmed that the part has electrolyte ion permeability. On the other hand, in the bag-shaped sealed lead-acid battery separators of Comparative Examples 1 and 2, the electrical resistance of the seal part was not measurable, and the seal part did not have electrolyte ion permeability. As in the case of the bag-shaped sealed lead-acid battery separators of Examples 3 to 4, when the ratio of the inorganic material contained in the sealing material is small and the electrolyte wettability of the sealing part is not good, the sealing material If an appropriate amount of penetrant (for example, surfactant) is blended, the electrolyte solution wettability of the seal portion can be improved.
(5) In a sealed lead-acid battery using a bag-shaped sealed lead-acid battery separator bag-processed using the sealing material of Examples 1 and 2, the battery characteristics (life performance) are the bag-like characteristics of Comparative Examples 1 and 2. It was confirmed that it was improved by 30% compared to a sealed lead-acid battery using a sealed lead-acid battery separator. Further, it was confirmed that the sealed lead-acid battery using the bag-shaped sealed lead-acid battery separator bag-processed using the sealing materials of Examples 3 to 4 is improved by 10 to 20% compared with Comparative Examples 1 and 2. did it.
(6) From the above, the bag-shaped sealed lead-acid battery separator bag-processed using the sealing material of the present invention is significantly larger than the bag-shaped sealed lead-acid battery separator bag-processed using the conventional seal material. In contrast, the separator bag processing part, that is, the seal part, maintains the porosity, and the electrolyte part can be absorbed into the seal part, the electrolyte solution retainability at the seal part is good, and the electrolyte ions permeate through the seal part. The separator has a sealing part that, like the parts other than the sealing part, can fully function as a sealed lead-acid battery separator and contribute to the battery reaction. It was confirmed that a high sealing strength comparable to that of a bag-shaped sealed lead-acid battery separator bag-processed using a sealing material was obtained.
Claims (7)
A lead-acid battery using the bag-shaped lead-acid battery separator according to any one of claims 3 to 6.
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|---|---|---|---|
| JP2004101467A JP2005285700A (en) | 2004-03-30 | 2004-03-30 | Seal material of separator for lead acid storage battery, bag-shape separator for lead acid storage battery, and lead acid storage battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100737827B1 (en) | 2006-08-28 | 2007-07-12 | 한국과학기술연구원 | Hybrid Composite Sealant for Flat Solid Oxide Fuel Cell Stacks |
| WO2012157311A1 (en) * | 2011-05-13 | 2012-11-22 | 新神戸電機株式会社 | Lead battery |
| CN105514326A (en) * | 2015-01-16 | 2016-04-20 | 万向A一二三系统有限公司 | Composite separator and power lithium titanate battery containing composite separator |
-
2004
- 2004-03-30 JP JP2004101467A patent/JP2005285700A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100737827B1 (en) | 2006-08-28 | 2007-07-12 | 한국과학기술연구원 | Hybrid Composite Sealant for Flat Solid Oxide Fuel Cell Stacks |
| WO2012157311A1 (en) * | 2011-05-13 | 2012-11-22 | 新神戸電機株式会社 | Lead battery |
| JPWO2012157311A1 (en) * | 2011-05-13 | 2014-07-31 | 新神戸電機株式会社 | Lead acid battery |
| US9735409B2 (en) | 2011-05-13 | 2017-08-15 | Hitachi Chemical Company, Ltd. | Lead acid battery |
| CN105514326A (en) * | 2015-01-16 | 2016-04-20 | 万向A一二三系统有限公司 | Composite separator and power lithium titanate battery containing composite separator |
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