JP2011018628A - Sealing plate with metal terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing plate with metal terminal closing an opening in a cylinder containing an electrolyte used in a battery or capacitor to attain firm adhesion bonding between an elastic sealing plate and a metal terminal.SOLUTION: The sealing plate with metal terminal is formed by integrally molding the sealing plates 1, 11 closing the openings in the bottomed cylinders 100, 200 containing the electrolytes and the metal terminal 2 by insulating them with an electric insulating member containing a thermoplastic resin as a principal component. A chemical treatment film 4 is formed on a surface of the metal terminal 2 by adhesion of a chemical treatment agent consisting of any one of the mercapto group, the thiocarbonyl group, the cyano group, the isocyanate group, the amino group, the ammonium group, the pyridinium group, the azinyl group, the carboxyl group, benzotriazole group, the triazin ethiol group and the like or a combination thereof and fluoro-rubber particles 6 and the chemical treatment agent are contained in the electric insulating member containing the thermoplastic resin as the principal component.

Description

  The present invention relates to a sealing plate that has a metal terminal and closes an opening of a bottomed cylindrical body that contains an electrolyte used for a battery or a capacitor.

  The sealing plate with a metal terminal that closes the opening of the bottomed cylindrical body containing the electrolyte used for the battery or the capacitor is made of a metal material or a synthetic resin material. It is also necessary to seal the cylinder body by tightly adhering the electrolyte and generated gas at the joint between the sealing plate and the metal terminal, so that the metal terminal and the sealing plate are electrically insulated from the synthetic resin material. 2. Description of the Related Art A sealing plate with a metal terminal that is integrally formed with a member is known.

  In the case of a sealing plate made of a metal material, it is necessary to use an electrical insulating material in order to obtain a sealing plate with a metal terminal. The metal terminal and the sealing plate are electrically insulated with a thermoplastic resin and molded integrally. Various sealing plates with metal terminals that are tightly bonded to prevent leakage have been proposed. For example, as shown in Patent Document 1, surface treatment is performed with a triazine thiol or a silane coupling agent on a metal lid plate and an electrode terminal that form a part of a battery container, and then between the lid body and the electrode terminal. In addition, a sealing plate with a metal terminal has been proposed in which a sealing member, an electrode terminal, and a lid plate are integrated by integrally molding a non-reinforced polyphenylene sulfide resin.

  On the other hand, in the case of a sealing plate made of a synthetic resin material, the sealing plate can be obtained by integrally molding the metal terminal and various resin molding materials in order to obtain a sealing plate with a metal terminal. It is necessary to improve the adhesion between the metal terminal and the sealing plate so that liquid leakage does not occur from the joint between the molded product and the metal terminal. For example, as shown in Patent Document 2, the sealing plate of the electrolytic capacitor is Proposed. That is, the sealing plate is made of molding materials such as phenol resin, unsaturated polyester resin, epoxy resin, melamine resin, polyimide resin, polyethylene terephthalate resin, polybutylene terephthalate resin, etc., and the metal terminal is made of aluminum, copper Made of iron, nickel, zinc, etc. alone, alloy, etc., this metal terminal is treated with a coupling agent such as amino silane, mercapto silane, epoxy silane, vinyl silane, etc., then the sealing plate is compression molded, transfer molded, injection molded, injected Molded by molding.

Paragraphs 0014 and 0028 of the specification of JP 2008-27849 A Paragraph 0005 of the specification of JP-A-5-234830

  The problem to be solved is that when a sealing plate made of a metal material or a sealing plate made of a synthetic resin material is integrally formed with a metal terminal, as in Patent Document 1 and Patent Document 2, respectively, Although it is a proposal to improve the tight bonding by chemical treatment for the finished member, the member made of synthetic resin is not pre-treated to absorb the stress by giving elasticity, and the battery or The inside of the cylinder containing the electrolyte used for the capacitor repeatedly expands due to the gas pressure, and the stress repeatedly acts on the joint between the metal member and the synthetic resin member, which adversely affects durability. give.

  The sealing plate with a metal terminal, which is formed by integrally forming a sealing plate that closes the opening of the bottomed cylinder housing the electrolytic solution of the present invention and a metal terminal, insulated by a thermoplastic resin, is made of a metal material. On the surface of the member, either a mercapto group, a thiocarbonyl group, a cyano group, an isocyanate group, an amino group, an ammonium group, a pyridinium group, an azinyl group, a carboxyl group, a benzotriazole group, a triazine thiol group, or a combination thereof An electrically insulating member having a thermoplastic resin as a main component and containing a fluororubber particle and the chemical agent is formed by forming a chemically-treated film by adhering a chemical treatment agent. It is characterized by having elasticity.

  The sealing plate with a metal terminal of the present invention has a mercapto group, a thiocarbonyl group, a cyano group, an isocyanate group, an amino group, an ammonium group, a pyridinium group, an azinyl group, a carboxyl group, a benzotriazole on the surface of a member made of a metal material. Forming a chemically treated film by the attachment of a chemical treatment agent of any one of these groups, triazine thiol groups, etc., or a combination thereof, and comprising as a main component a thermoplastic resin containing the chemical treatment agent and fluororubber particles Since the insulating member is given elasticity, the inside of the cylinder containing the electrolyte used for the battery or capacitor absorbs the expansion caused by the gas pressure, and the main component is a member made of a metal material and a thermoplastic resin. PPS resin and PBT resin in an electrical insulation member mainly composed of this thermoplastic resin that relieves stress transmission to the joint with the electrical insulation member Since the melting temperature of fluoro rubber is higher than the melting temperature of thermoplastic resins such as PFA resin, PP resin, and PEEK resin, fluoro rubber does not melt even when the thermoplastic resin melts during molding such as injection molding. In addition, the elasticity of fluororubber can be maintained, and since the fluororubber particles are in close contact with the thermoplastic resin by a chemical treatment agent, the confidentiality of the electrical insulating member itself mainly composed of the thermoplastic resin can be maintained. .

  It is sectional drawing which shows Embodiment 1 of this invention.   It is sectional drawing which shows Embodiment 2 of this invention.   It is explanatory drawing of joining of the member made from the metal material of this invention, and the electrically insulating member which has a thermoplastic resin as a main component.   It is an enlarged view of the fluororubber which has the chemical treatment film | membrane formed in the surface.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 is formed by integrally molding a sealing plate 1 and a metal terminal 2 as an electrical insulating member mainly composed of a thermoplastic resin that closes an opening 100A of a bottomed cylindrical body 100 that contains an electrolytic solution. The sealing plate with a metal terminal is shown, and the battery element, the electrolyte solution, the connection structure with the electrode terminal, etc. inside this cylindrical body 100 are omitted.

  In FIG. 1, a cylinder 1 is made of a non-metallic material such as a thermoplastic resin such as polyamide resin or ABS resin, or a thermosetting resin such as epoxy resin or phenol resin, and is a bottomed container for containing an electrolytic solution. A protective member 101 made of a metal such as a copper alloy, an aluminum alloy, or stainless steel is formed in close contact with the inner peripheral wall surface. Further, the protective member 101 extends to the end surface of the opening 100A of the cylindrical body 1. An extending portion 102 that extends is formed.

  The sealing plate 1 disposed in the opening 100A of the cylindrical body 100 is made of PPS resin (polyphenylene sulfide resin), PBT resin (polybutylene terephthalate resin), PFA resin (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer), PP resin. (Polypropylene resin), PEEK resin (polyetheretherketone resin) and other thermoplastic insulating materials whose main component is 70% by weight or more, but not only using each thermoplastic resin alone but also other You may combine with resin. Furthermore, you may mix 15 weight% or less of various filler materials with the said thermoplastic resin. The thermoplastic resin particles 5 mainly composed of such a thermoplastic resin include 1 to 25% by weight of fluorine rubber particles 6 and 0.01 to 0.5% by weight of mercapto group, thiocarbonyl group, cyano group, Heat that becomes an electrical insulating member containing a chemical treatment agent of any one or a combination of isocyanate group, amino group, ammonium group, pyridinium group, azinyl group, carboxyl group, benzotriazole group, triazine thiol group, etc. A member 3 made of a plastic resin material is formed. In this case, as shown in FIG. 4, a chemical treatment film 4 in which a chemical treatment agent is attached to the surface of the fluororubber particles 6 may be formed.

  A pair of metal terminals 2 serving as a positive electrode and a negative electrode are integrally formed at an intermediate position of the sealing plate 1, and an annular metal ring 8 is integrally formed on the outer peripheral edge and fixed to the sealing plate 1. The metal terminal 2 and the metal ring 8 are made of a single or alloy metal material such as iron, nickel, zinc, etc. such as aluminum, copper, stainless steel, etc., and each surface has a pre-mercapto as shown in FIG. A chemical treatment agent of any one of these groups, thiocarbonyl group, cyano group, isocyanate group, amino group, ammonium group, pyridinium group, azinyl group, carboxyl group, benzotriazole group, triazine thiol group, or a combination thereof. Thus, the chemically treated film 4 is formed. In this case, the chemical treatment agent is particularly preferably a silane coupling agent or a triazine thiol compound. Thus, the metal terminal 2 and the metal ring 8 on which the chemically treated film 4 is formed constitute members 7 and 71 made of a metal material.

  The principle of the present invention is that, in FIG. 3, the metal terminal 2 and the metal ring 8 on which the chemical treatment film 4 is previously formed as described above are a member 7 made of a metal material and a member 71 made of a metal material, respectively. The members 7 and 71 made of these metal materials are made from the thermoplastic resin particles 5 containing 1 to 25% by weight of the fluororubber particles 6 and 0.01 to 0.5% by weight of the chemical treating agent. Then, the member 3 made of a thermoplastic resin material to be an electrically insulating member is integrated by heating and pressing. In order to integrate by heating and pressurization, the metal terminal 2 and the metal ring 8 are placed on an injection molding die (not shown) in the shape of the sealing plate 1 and 1 to 25% by weight. Fluororubber particle 6 and 0.01 to 0.5% by weight of mercapto group, thiocarbonyl group, cyano group, isocyanate group, amino group, ammonium group, pyridinium group, azinyl group, carboxyl group, benzotriazole group, triazine thiol With a metal terminal formed by injecting thermoplastic resin particles 5 containing a chemical treatment agent of any one of a group or the like or a combination thereof into the mold, and simultaneously forming the sealing plate 1, the metal terminal 2, and the metal ring 8 Since it is a sealing plate, in addition to the physical bonding between the metal and the resin, the metal terminal 3 and the annular metal ring 8 are attached to the intermediate position and the outer peripheral edge of the sealing plate 1 respectively by the chemical treatment agent. It is firmly adhered bonded metal terminals with sealing plate is obtained.

  With the sealing plate with metal terminals obtained in this way, as shown in FIG. 1, the opening 100 </ b> A of the bottomed tubular body 100 that stores the electrolytic solution is closed. At that time, the metal protective member 101 is in close contact with the inner peripheral wall surface of the cylindrical body 100, and the extended portion 102 in which the protective member 101 extends to the opening end of the opening 100A is in close contact with the opening end. Then, the protective member 101 and the metal ring 8 of the sealing plate 1 are melted and fixed with an ultrasonic wave or a laser to seal the opening 100A of the cylindrical body 100. In this case, in the above-described embodiment, the cylindrical body 100 is made of a non-metallic material. However, the cylindrical body 100 is formed of a metal plate made of aluminum alloy, stainless steel, or the like. It may be melted and fixed with a laser or the like.

(Embodiment 2)
In FIG. 2, the sealing plate 11 made of a metal material that closes the opening 100A of the bottomed cylindrical body 100 that stores the electrolytic solution and the metal terminal 2 are insulated by an electrical insulating member mainly composed of a thermoplastic resin. The sealing plate with a metal terminal formed integrally is shown, and the battery element in the cylindrical body 100, the electrolytic solution, the connection structure with the electrode terminal, and the like are omitted as in FIG.

  The cylindrical body 200 is made of a metal plate made of aluminum alloy, stainless steel, or the like, and a metal terminal 2 serving as a positive electrode is provided at a substantially central position of the sealing plate 11 disposed in the opening 200A. On the other hand, the sealing plate 11 is made of a single or alloy metal material such as iron such as aluminum, copper and stainless steel, nickel and zinc, and constitutes a negative electrode. Further, on the surface of at least one of the sealing plate 11 and the metal terminal 2, at the position where the metal terminal 2 of the sealing plate 11 is provided, a mercapto group, a thiocarbonyl group, a cyano group, an isocyanate group, an amino group, A chemical treatment film 4 is formed by applying a chemical treatment agent of any one or a combination of ammonium group, pyridinium group, azinyl group, carboxyl group, benzotriazole group, triazine thiol group and the like. In this case, the chemical treatment agent is particularly preferably a silane coupling agent or a triazine thiol compound. Thus, the sealing plate 1 and the metal terminal 2 on which the chemically treated film 4 is formed constitute members 7 and 71 made of a metal material.

  In this case, in order to configure the metal terminal 2 serving as the positive electrode and the sealing plate 11 serving as the negative electrode, the metal terminal 2 and the sealing plate 1 need to be electrically insulated. Similarly, a thermoplastic resin such as PPS resin, PBT resin, PFA resin, PP resin, and PEEK resin is the main component of 70% by weight or more, but not only using each thermoplastic resin alone but also other resins. And may be combined. Furthermore, you may mix 15 weight% or less of various filler materials with the said thermoplastic resin. The thermoplastic resin particles 5 mainly composed of such a thermoplastic resin include 1 to 25% by weight of fluorine rubber particles 6 and 0.01 to 0.5% by weight of mercapto group, thiocarbonyl group, cyano group, Heat that becomes an electrical insulating member containing a chemical treatment agent of any one or a combination of isocyanate group, amino group, ammonium group, pyridinium group, azinyl group, carboxyl group, benzotriazole group, triazine thiol group, etc. A member 3 made of a plastic resin material is formed. In this case, the chemical treatment film 4 may be formed in advance by attaching a chemical treatment agent to the surface of the fluororubber particles 6.

  As described above, the metal terminal 2 and the sealing plate 11 in which the chemical treatment film 4 is formed in advance on the respective surfaces of the metal terminal 2 and the sealing plate 11 are placed at predetermined positions of an injection mold (not shown), That is, the metal terminal 2 is placed at a position substantially at the center of the sealing plate 11, and 1 to 25% by weight of the fluororubber particles 6 and 0.01 to 0.5% by weight of a mercapto group, a thiocarbonyl group, Thermoplastic resin particles 5 containing a chemical treating agent of any one or a combination of cyano group, isocyanate group, amino group, ammonium group, pyridinium group, azinyl group, carboxyl group, benzotriazole group, triazine thiol group and the like. Is injected into a mold for injection molding, and the sealing plate 11 and the metal terminal 2 are insulated and integrally formed by the electrical insulating member, so that the metal terminal 3 is formed at a substantially central position of the sealing plate 11. Serial chemical treating agent a metal and a resin metal terminals with a sealing plate chemically bonded to the physical junction is firmly closely bonded is added as co-molding can be obtained. In this embodiment, the metal terminal 2 has been described as being provided at a substantially central position of the sealing plate 11, but an arbitrary position of the sealing plate 11 may be appropriately selected depending on the use of the battery or the capacitor.

  The opening 200A of the bottomed cylindrical body 200 that accommodates the electrolytic solution is closed with the sealing plate with the metal terminal obtained in this way, and the sealing plate 11 and the cylindrical body 200 are melted and fixed by an ultrasonic wave or a laser. Thus, the opening 100A of the cylindrical body 100 is sealed. In this case, as in the first embodiment, the cylindrical body 200 may be made of a nonmetallic material.

  The sealing plate with a metal terminal of the present invention is effective as a sealing member for capacitors and secondary batteries in which an electrolytic solution is electrolyzed.

DESCRIPTION OF SYMBOLS 1 Sealing plate 11 Sealing plate 2 Metal terminal 3 Member made of thermoplastic resin material 4 Chemical treatment film 5 Thermoplastic resin particle 6 Fluoro rubber particle 7 Member made of metal material 100 Cylindrical body 200 Cylindrical body

Claims (6)

  In a sealing plate with a metal terminal, in which a sealing plate that closes an opening of a bottomed cylindrical body that contains an electrolyte and a metal terminal are integrally formed by being insulated by an electrical insulating member mainly composed of a thermoplastic resin The metal terminal has either a mercapto group, a thiocarbonyl group, a cyano group, an isocyanate group, an amino group, an ammonium group, a pyridinium group, an azinyl group, a carboxyl group, a benzotriazole group, or a triazine thiol group on the surface thereof. An electrically insulating member comprising a thermoplastic resin as a main component is formed by forming a chemically treated film by adhering a combination of chemical treatment agents, and the fluororubber particles and the chemical treating agent are mainly composed of thermoplastic resin particles. And a sealing plate with a metal terminal.   The sealing plate is made of an electrically insulating member containing thermoplastic resin particles as a main component and containing fluororubber particles and the chemical treatment agent. The chemically treated film is formed on the surface of the electrically insulating member and the surface of the sealing plate. The metal terminal sealing plate according to claim 1, wherein the metal terminal is formed integrally with a metal terminal.   A metal terminal and an annular metal ring are respectively provided at an intermediate position and an outer peripheral edge of the sealing plate, and the chemical treatment film is formed on each surface of the metal terminal and the annular metal ring. The sealing plate with a metal terminal according to claim 2, wherein the sealing plate is formed integrally with the electrical insulating member.   The sealing plate is made of a metal material, and the chemical treatment film is formed on each surface of the sealing plate and the metal terminal, and the sealing plate and the metal terminal are mainly composed of thermoplastic resin particles. 2. A sealing plate with a metal terminal according to claim 1, wherein the sealing plate is formed integrally with an electrically insulating member containing fluorine rubber particles and the chemical treating agent.   The electrical insulating member containing the thermoplastic resin as a main component is composed of thermoplastic resin particles of any one of PPS resin, PBT resin, PFA resin, PP resin, and PEEK resin. The sealing plate with a metal terminal according to any one of claims 1 to 4, further comprising 01 to 0.5% by weight of the chemical treatment agent.   The electrical insulating member containing the thermoplastic resin as a main component is characterized in that the thermoplastic resin particles contain fluororubber particles formed on the surface by forming a chemical treatment film by adhesion of the chemical treatment agent. The sealing board with a metal terminal as described in any one of Claim 1 to 5.

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