JP2714596B2 - Battery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery.

[0002]

2. Description of the Related Art Conventionally, ABS resin is used as a battery case and lid material for a small sealed lead-acid battery, and a polyolefin-based synthetic resin is less expensive than an ABS resin. Not used. This is because ABS resin can be firmly bonded with an adhesive, whereas polyolefin-based synthetic resin has poor adhesion,
This is because strong bonding cannot be performed.

[0003]

An object of the present invention is to provide a battery using a battery case and a lid made of a polyolefin-based synthetic resin.

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have completed the present invention.

According to the first aspect of the present invention, there is provided a battery having a structure in which a fitting portion between a battery case and a lid and an opening of an external terminal lead-out portion located on the lid are sealed with a hardening type sealing agent. At least one of the tank and the lid is (A) 30 to 97% by weight of a polyolefin-based synthetic resin and (B) a rubbery substance 70.
(C) 0.05 to 40 parts by weight of carbon black with respect to 100 parts by weight of the resin (A) + (B), and a fitting portion between the battery case and the lid. An object of the present invention is to provide a battery, wherein an opening portion of a lid body is irradiated with ultraviolet rays in advance and then sealed with a curable sealing agent.

According to a second aspect of the present invention, there is provided a battery having a structure in which a fitting portion between a battery case and a lid and an opening of an external terminal lead-out portion located on the lid are sealed with a hardening type sealing agent. At least one of the tank and the lid is (A) 30 to 97% by weight of a polyolefin-based synthetic resin and (B) a rubbery substance 70.
(D) 3 to 150 parts by weight of an inorganic filler with respect to 100 parts by weight of the resin (A) + (B), and a fitting portion between the battery case and the lid. In addition, the present invention provides a battery characterized in that an opening of a lid is irradiated with ultraviolet rays in advance and then sealed with a curable sealing agent.

A third aspect of the present invention relates to a battery having a structure in which a fitting portion between a battery case and a lid and an opening of an external terminal lead-out portion located on the lid are sealed with a hardening type sealing agent. At least one of the tank and the lid is (A) 30 to 97% by weight of a polyolefin-based synthetic resin and (B) a rubbery substance 70.
(C) 0.05 to 40 parts by weight of carbon black and (D) 3 to 150 parts by weight of an inorganic filler with respect to 100 parts by weight of the resin (A) + (B). It is another object of the present invention to provide a battery wherein the fitting portion between the battery case and the cover and the opening of the cover are irradiated with ultraviolet rays in advance and then sealed with a hardening type sealing agent.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, at least one selected from an epoxy resin adhesive, a polyurethane adhesive, and a reactive acrylic adhesive is used as the sealing agent. A battery is provided.

Next, the present invention will be described with reference to the drawings. FIG.
FIG. 2 is an explanatory sectional view of the battery of the present invention. In the figure, 1 is a polyolefin-based synthetic resin container, 2 is a polyolefin-based synthetic resin lid, 3 is an anode pole, 4 is a cathode pole, 5 is an anode external terminal,
6 denotes a cathode external terminal, 7 and 8 denote O-rings, and 9 denotes an electrode plate group. F indicates a sealing agent.

In the battery of the present invention, at least one of the battery case 1 and the cover 2 is made of a polyolefin-based synthetic resin, and at least the surface of the battery case 1 and the cover 2 to which the sealing agent is applied is made of an ultraviolet ray. Irradiated.

The polyolefin-based synthetic resin (A) constituting the battery case 1 and / or the lid 2 in the present invention includes the following. (1) a homopolymer of propylene, a block or random copolymer of propylene with an α-olefin such as ethylene or butene-1 (hereinafter abbreviated as “PP”);
High-, medium-, low-density polyethylene, linear low-density polyethylene, ultra-low-density polyethylene, ethylene-α, β-unsaturated carboxylic acid and other copolymers with unsaturated carboxylic acids or derivatives thereof, ethylene -Ethylene polymers such as ethylene-vinyl ester copolymers such as vinyl acetate copolymers, and polyolefins such as polybutene and polymethylpentene. (2) the above polyolefins or other polymers,
For example, polyamide, polyester, polystyrene, AB
Alloys and blends with at least one engineering plastic such as S, polyphenylene ether, and polycarbonate. If necessary, additives such as an antioxidant, a weathering agent, a lubricant, a nucleating agent, a plasticizer, an antistatic agent, a flame retardant, and a coloring pigment may be added to these resins.

At least one of the battery case and the lid in the battery of the present invention is the above-mentioned polyolefin-based synthetic resin, but depending on the case, one of them may be another resin. Examples of such a resin include an ABS resin and an ABS / polycarbonate blend.

The rubbery substance (B) used in the present invention includes ethylene-propylene random copolymer rubber, ethylene-propylene-diene random copolymer rubber,
1,2-polybutadiene, styrene / butadiene / styrene block copolymer rubber or hydrogenated product thereof, styrene / isoprene, styrene block copolymer rubber or hydrogenated product thereof, polyisobutylene rubber, styrene / butylene rubber, isoprene rubber, nitrile Rubber, chloroprene rubber, polyurethane rubber, polyester elastomer, polyamide elastomer, natural rubber, etc.
Among them, ethylene / propylene random copolymer rubber,
Ethylene-propylene-diene random copolymer rubber,
Styrene / butadiene / styrene block polymer rubber hydrogenated products are preferred. These may be used alone or in combination. When a rubbery substance having a strong polarity and poor compatibility with a polyolefin-based synthetic resin is used, it is preferable to use a compatibilizer suitable for the system.

The compounding amount of the rubbery substance (B) is 70 to 70% by weight of the polyolefin synthetic resin (A).
3% by weight. If the amount is less than 3% by weight, the effect of improving the adhesive strength is not sufficient, and if it exceeds 70% by weight, physical properties such as heat resistance are significantly reduced.

In the present invention, the adhesion is dramatically improved by blending (C) carbon black into the synthetic resin composition of (A) the polyolefin-based synthetic resin and (B) the rubber-like substance. As the carbon black (C) used in the present invention, products produced by conventionally known channel, furnace, acetylene, and thermal production methods can be used. In addition, commonly used masterbatch carbon black can also be used. A dispersant, an antioxidant, and the like may be used in the above master batch. (C) The compounding amount of carbon black is (A)
30 to 97% by weight of a polyolefin synthetic resin, (B) 70 to 3% by weight of a rubber-like substance, and the resin (A) + (B) 10
It is blended in an amount of 0.05 to 40 parts by weight, preferably 0.3 to 20 parts by weight based on 0 parts by weight.

In the present invention, rigidity, heat resistance or adhesive strength can be obtained by further mixing (D) an inorganic filler with the above-mentioned polyolefin-based synthetic resin and a rubbery substance or a composition obtained by mixing the composition with carbon black. Etc. can be improved. As the inorganic filler (D) used in the present invention, various types of conventionally known granular, flat, scaly, acicular, spherical, hollow, and fibrous fillers can be used. Specifically, calcium carbonate, magnesium carbonate, calcium sulfate, calcium silicate, magnesium hydroxide, aluminum hydroxide, clay, diatomaceous earth, talc, alumina, silica, glass powder, iron oxide, metal powder, graphite, silicon carbide , Silicon nitride, boron nitride, aluminum nitride, wollastonite, mica, sericite, pyrophyllite, metal flake, graphite, shirasu balloon, perlite, glass fiber, carbon fiber, whisker, metal fiber, silicon carbide fiber, etc. it can.

Further, in order to improve dispersibility, a silane coupling agent, an organic titanate coupling agent,
An inorganic filler that has been surface-treated with an aluminum-based coupling agent, a fatty acid, a metal salt thereof, or the like may be used. These may be used alone or as a mixture, and the type and amount are selected according to the purpose. The amount is 3 to 150 parts by weight per 100 parts by weight of the resin (A) 30 to 97% by weight of the polyolefin synthetic resin and (B) 70 to 3% by weight of the rubber-like substance.
Parts by weight, preferably 5 to 130 parts by weight, more preferably 10 to 100 parts by weight. If the content is less than 3 parts by weight, the effect of improving the adhesive strength is not sufficient, and if it exceeds 150 parts by weight, the mechanical strength, particularly the impact strength, is extremely unfavorably reduced.

The sealing agent used in the present invention is basically a curable adhesive, particularly preferably an epoxy, polyurethane or reactive acrylic adhesive. The epoxy adhesive has an epoxy resin and a curing agent, preferably an amine compound, as main components. The epoxy resin is not particularly limited as long as it has two or more epoxy groups in one molecule. For example, bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol S epoxy resin, phenol novolac epoxy resin , Alicyclic epoxy resin, heterocyclic epoxy resin, glycidyl ester-based epoxy resin, glycidylamine-based epoxy resin, bromo-containing epoxy resin, hydrogenated bisphenol A-type epoxy resin, propylene glycol glycidyl ether, pentaerythritol polyglycidyl ether, etc. Examples thereof include aliphatic epoxy resins and urethane-modified epoxy resins, and these epoxy resins may be used as a mixture of two or more kinds.

If necessary, a monoepoxy compound such as butyl glycidyl ether, phenyl glycidyl ether, cresyl glycidyl ether, or a glycidyl ether of an aliphatic alcohol may be blended to reduce the viscosity.

In the present invention, the amine compound which is a preferable curing agent used for the epoxy resin includes, for example, aliphatic amines such as diethylenetriamine, triethylenetetramine and diethylaminopropylamine; mensendiamine, isophoronediamine, bisamine (4-amino-
Alicyclic polyamines such as 3-methylcyclohexyl) methane, N-aminoethylpiperazine; aliphatic polyamines containing an aromatic ring such as meta-xylenediamine;
Polyethyleneimine having secondary and tertiary amine nitrogens in one molecule; aromatic polyamines such as metaphenylenediamine, methylenedianiline and diaminodiphenylsulfone; the above aliphatic polyamines, aliphatic polyamines containing aromatic rings, and aromatics Modified polyamines produced by modifying a polyamine compound such as an aromatic polyamine by a known modification method, for example, an addition reaction with an epoxy compound, a Michael addition reaction with acrylonitrile, an acrylate ester, or a Mannich reaction with a methylol compound; 2-methylimidazole , 2-ethyl-4-methylimidazole, 1-cyanoethyl-2-methylimidazole and other imidazole compounds; tertiary amines such as trisdimethylaminomethylphenol; tris-dimethylaminomethylphenol tri-2-ethyl Hexyl acid salts.

Also, commercially available versamide (manufactured by Henken Hakusui), tomide (manufactured by Fuji Chemical Industry), sunmide (manufactured by Sanwa Chemical Industry), and lactamide (manufactured by Dainippon Ink and Chemicals), which are mainly formed by the condensation reaction of dimer acid and polyamine And polyamide polyamines known under trade names such as Furthermore, those that can be cured at 70 to 80 ° C,
For example, JP-A-60-4524 and JP-A-62-2652.
No. 3 and a latent curing agent described in JP-A-1-254731 can also be used. For epoxy resin, in addition to the above main components, if necessary, inorganic fillers, for example, powders of silica, quartz glass, mica, calcium carbonate, alumina, talc, clay, graphite, carbon black, etc. Can also be added. Further, in order to improve curability, a known curing accelerator such as phenol, nonylphenol, salicylic acid, and triphenyl phosphite can be used.

The polyurethane adhesive used in the present invention is:
It contains an isocyanate component and a polyol component as basic components. If necessary, auxiliary components such as a catalyst, a stabilizer, a pigment, a filler, and a tackifier are blended. The isocyanate component includes aliphatic isocyanates, alicyclic isocyanates, aromatic isocyanates, and modified products thereof. Examples of the aliphatic isocyanate include hexamethylene diisocyanate, and examples of the alicyclic isocyanate include isophorone diisocyanate. As the aromatic isocyanate, for example, tolylene diisocyanate,
Xylylene diisocyanate, diphenylmethane diisocyanate, polymeric diphenylmethane diisocyanate, triphenylmethane triisocyanate, tris (isocyanatephenyl) thiophosphate and the like. Examples of the modified isocyanate include urethane prepolymer, hexamethylene diisocyanate buret, hexamethylene diisocyanate, trimer, and isophorone diisocyanate trimer.

Examples of the polyol component include low molecular weight polyols such as ethylene glycol, diethylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, and trimethylolpropane; polyethylene glycol, polypropylene glycol, and polytetraol. Polyether polyols such as methylene glycol and ethylene oxide / propylene oxide copolymer; polycaprolactone, poly β-methyl-δ-butyrolactone, polyesters from diols and dibasic acids, and the like. Other examples include a hydroxyl group-containing liquid polybutadiene, castor oil, polycarbonate diol, and acrylic polyol.

As auxiliary components, coupling agents such as silane coupling agents and titanium coupling agents; tackifiers such as terpene resins, phenol resins, terpenes, rosin resins and xylene resins; calcium carbonate, clay, titanium oxide, Fillers and thixotropic agents such as carbon black and Aerosil; and stabilizers such as ultraviolet absorbers, antioxidants, heat stabilizers, and hydrolysis stabilizers.

In the present invention, the urethane-based adhesive can be used in any of a one-pack type and a two-pack type. The curing type includes a reaction type by mixing of two salts, a moisture curing type, and a thermosetting type.

The reactive acrylic adhesive used in the present invention is a liquid adhesive containing an acrylic monomer or oligomer as a main component, and is cured by anionic polymerization, radical polymerization, or redox polymerization upon bonding.
Various types of such reactive acrylic adhesives are known in the art. For example, an anionic polymerization type instant adhesive containing 2-cyanoacrylate as a main component or a methacrylate ester as a main component Redox polymerization type acrylic adhesive (SGA), and radical polymerization type ultraviolet curing type adhesive by irradiation with ultraviolet light containing polyfunctional acrylic acid ester or polyfunctional methacrylic acid ester as a main component.

In the present invention, prior to the bonding operation, the surface of the battery case and the lid to which the sealing agent is applied is irradiated with ultraviolet rays. In this case, the light to be irradiated is a special ultraviolet ray having an irradiation wavelength in a region of 300 nm or less. It is. The action of ultraviolet light on polyolefin-based synthetic resin molding differs depending on the wavelength, and shorter wavelengths are more effective. Therefore, 300 nm or less,
Preferably, photoenergy with a wavelength shorter than 254 nm occupies 85% or more of the total energy.
Ultraviolet light having a working wavelength around 185 nm is preferred. Therefore, it is preferable that the material of the ultraviolet irradiation lamp is high in transmittance of ultraviolet light having a short wavelength, and synthetic quartz glass having higher purity than natural quartz glass is preferable.

When irradiating the surface of the battery case and the lid with the ultraviolet rays, the distance between the surface of the battery case and the cover on which the sealing agent is applied and the lamp is about 1 to 50 cm, more preferably 5 to 50 cm.
A range of up to 30 cm is preferred. If the irradiation distance is less than 1 cm, excessive irradiation may occur, and the surfaces of the battery case and the lid may be chemically deteriorated. If the distance exceeds 50 cm, the irradiation intensity may be insufficient and sufficient adhesive strength may not be obtained. The irradiation time is optional, but if the irradiation time is too short, sufficient adhesive strength may not be obtained. Conversely, if the irradiation time is too long (especially when the irradiation distance is short), excessive irradiation may cause deterioration. Therefore, about 20 seconds to 5 minutes is a practical processing time.

In the present invention, before applying the sealing agent,
The surface of the battery case and the lid is usually treated with an alcohol-based or mineral oil-based solvent for the purpose of degreasing, cleaning, etc., but by irradiating with ultraviolet rays after being brought into contact with an organic solvent described below in advance. Thus, a stronger adhesive force can be obtained.

As the organic solvent to be used, those having an ultraviolet absorbing property are preferable. The ultraviolet absorbing solvent may have an ultraviolet absorbing structure in the molecule itself, or may have an additive having an ultraviolet absorbing structure dissolved in the solvent. Examples of the former are benzene,
Aromatic hydrocarbon solvents such as toluene, xylene, decalin, and tetralin, carbon tetrachloride, trichloroethylene,
Examples include halogenated hydrocarbon solvents such as tetrachloroethylene, chloroform, trichloroethane, tetrachloroethane, trichlorotrifluoroethane, bromobenzene, and dichlorobenzene, or acrylic ester solvents.Examples of the latter include acetophenone Aromatic hydrocarbons, halogenated hydrocarbons, acrylates, and the like, in which a photosensitizer such as a benzophenone-based derivative, a benzoin-based derivative, or a diazonium salt-based derivative is dissolved.
There are solvents such as acrylamide. As a method of bringing the organic solvent into contact with the battery case and the lid surface, in addition to the dipping method, spraying,
There are methods such as coating and the like. When the battery case and the lid are brought into contact with the solvent, ultrasonic waves can be applied to promote the adsorption of the solvent to the surface.

In the present invention, when the surfaces of the battery case and the lid are brought into contact with a solvent, the solvent may be at room temperature, but the effect is enhanced by heating it. The heating temperature is preferably as high as possible, but if heated excessively, volatilization and evaporation become severe. Another preferred method of contacting with the solvent is to heat the battery case and the lid itself. Thereby, volatilization and evaporation of the solvent can be minimized. The heating temperature of the molded article is preferably higher, but if it is too high, it may be deformed or melted.
The contact time with the solvent is 5 seconds to 20 minutes, preferably 10 seconds.
Seconds to 5 minutes. If the time is less than 5 seconds, a substantial effect of the solvent treatment cannot be expected, and even if the contact is carried out for more than 20 minutes, the effect is not improved, and it is economically disadvantageous.

As described above, the present invention is a method of surface-treating a polyolefin resin molded article using a special ultraviolet ray and bonding it with a curable adhesive. For low polyolefin resin molded products, it is simple and safe, does not cause pollution problems, can bond various materials with strong adhesion at low cost and provides an industrially effective bonding method. is there.

[0033]

The battery of the present invention has the advantage that it is inexpensive as compared with the conventional ABS resin because at least one of the battery case and the lid is made of a polyolefin resin. Since the joint between the sealing agent in the tank and the lid has been subjected to ultraviolet irradiation treatment in advance, the adhesion at the joint is strong, and the joint between the battery case and the lid does not come off during use of the battery. .

[0034]

The present invention will be described below in more detail with reference to examples, but the present invention is not limited to these examples. In addition, all the parts and% shown below are based on weight.

Examples 1 to 13 (A) Polyolefin synthetic resin, (B) rubbery substance,
(C) Carbon black and (D) an inorganic filler were blended as shown in Table 1, and a composition was obtained using a kneading extruder (NVC-50, manufactured by Nakatani Machinery Co., Ltd.). About this composition, an injection molding machine (Toshiba Machine Co., Ltd., IS-10
Using 0), a plate having a thickness of 3 mm was formed.

Next, this molded plate was cut into a width of 10 mm, wiped with isopropyl alcohol, and then subjected to a low-pressure mercury lamp (SUV-110, manufactured by Sen Special Light Source Co., Ltd.).
, And the distance between the light source and the surface of the molded plate was kept at 5 cm, and irradiation was performed for 2 minutes in an air atmosphere. However, the low-pressure mercury lamp used here was made using synthetic quartz having a light transmittance of 85% or more at a wavelength of 185 nm.

Next, the following adhesives (E1 to E3) were applied to the irradiated molded plate, and mild steel (JIS G3141, 125 × 25 × 1.6 m) wiped with acetone.
m) was attached with an overlap of 7 mm, pressure-bonded with a clip, and heat-treated at 80 ° C. for 1 hour. The tensile shear strength at 25 ° C. of the test piece thus obtained was measured, and the results are shown in Table 1. In addition, the measurement of the tensile shear adhesive strength, using an Instron universal testing machine,
The crosshead bead was performed under the condition of 5 mm / min.

Comparative Examples 1 to 13 Ultraviolet rays were applied to and bonded to the polyolefin synthetic resin molded plates shown in Table 1 in the same manner as in the above Examples, and the tensile shear adhesive strength of the obtained test pieces was measured. Table 1 shows the results.

Comparative Examples 14 to 15 Table 1 shows the tensile shear bond strength of the test pieces when the polyolefin synthetic resin molded plates shown in Table 1 were bonded without being irradiated with ultraviolet rays. The contents of the polyolefin resin, rubbery substance, carbon black, filler and adhesive used in the present example and comparative example are shown below. (A) Polyolefin resin (A1) PP: “propylene / ethylene block copolymer” (MFR = 8 g / min) (manufactured by Nippon Petrochemical Co., Ltd.) (A2) PE: “high density polyethylene” (density = 0.9)
63, MFR = 5 g / min) (Nippon Petrochemical Co., Ltd.) (B) Rubbery substance (B1) EPM: “Ethylene / propylene random copolymer rubber” (Mooney viscosity ML [1 + 4] (100 ° C.)
70) (manufactured by Nippon Synthetic Rubber Co., Ltd.) (B2) EPDM: “Ethylene / propylene / diene random copolymer rubber” (Mooney viscosity ML [1 + 4]
(100 ° C.) 88) (manufactured by Nippon Synthetic Rubber Co., Ltd.) (B3) SEBS: “hydrogenated styrene-butadiene-styrene block copolymer” (trade name: “Clayton G1
657 "Shell Chemical Co., Ltd.) (C) Carbon black (C1) Carbon black: trade name“ RCF # 33 ”
(C2) Carbon black masterbatch (composition is composed of 80% by weight of polypropylene and 20% by weight of carbon black): trade name "MBB-245" (manufactured by Polycor Industries) (D) Filler (D1) Talc: trade name "FFR" (manufactured by Asada Flour Milling Co., Ltd.) (D2) Calcium carbonate: trade name "BSK-5" (manufactured by Dowa Calfine Co., Ltd.) (E) Adhesive (E1) Epoxy adhesive : Bisphenol A type epoxy resin, 100 parts by weight of trade name “Araldite AW106” and a curing agent, trade name “Hardner HV953U” 8
A mixture of 0 parts by weight (both manufactured by Chiba Nagase).
Both were mixed immediately before application. (E2) Urethane adhesive: trade name "URALANE5
772A (base), "URALANE5772B (hardener)", mixing ratio of base and hardener = 100/23 (parts by weight), "FURANE PRODUCTS CO." (E3) Reactive acrylic adhesive: trade name Hard Rock E-510K-07 "(manufactured by Denki Kagaku Kogyo Co., Ltd.)

[0040]

[Table 1]

As can be seen from the results shown in Table 1, the specific polyolefin-based synthetic resin plate of the present invention irradiated with ultraviolet rays should be bonded with a curable adhesive with a large tensile shear strength of about 100 kg / cm ² or more. Can also .
The tensile shear strength of such a magnitude is a value sufficient for bonding the battery case and the lid of the battery with practical adhesive strength.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of one embodiment of a lead storage battery of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery case 2 Lid 3 Anode pole 4 Cathode pole 5 Anode external terminal 6 Cathode external terminal 7, 8 O-ring 9 Electrode group F Sealing agent

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masatoshi Kobayashi 8-11 Isogo, Isogo-ku, Yokohama, Kanagawa Prefecture (72) Inventor Atsushi Aoyama 2-5-11, Showa, Kawasaki-ku, Kawasaki, Kanagawa Prefecture (72) Inventor Hiroshi Amano 236 Nakai, Tatsuno-cho, Tatsuno-shi, Hyogo Prefecture Chiba Nagase Chief of the Tatsuno Plant Counselor Referee Haruo Oya Referee Hitoshi Miura Referee Susumu Ogawa (56) References JP-A-60-7056 (JP, A) JP-A-48- 44338 (JP, A)

Claims (4)

(57) [Claims] 1. A battery having a structure in which a fitting portion between a battery case and a lid and an opening of an external terminal lead-out portion located on the lid are sealed with a hardening type sealing agent. At least one is (A) a polyolefin-based synthetic resin 30
(C) with respect to 100% by weight of the resin (A) + (B) and (B) 70 to 3% by weight of the rubbery substance and (B)
The composition comprises 0.05 to 40 parts by weight of carbon black, and the fitting part of the battery case and the lid and the opening of the lid are
A battery characterized in that it is irradiated with ultraviolet rays in advance and then sealed with a curable sealing agent. 2. A battery having a structure in which a fitting portion between a battery case and a cover and an opening of an external terminal lead-out portion located on the cover are sealed with a hardening type sealing agent. At least one is (A) a polyolefin-based synthetic resin 30
(D) based on 100% by weight of the resin (A) + (B) and (B) 70 to 3% by weight of the rubbery substance and (B)
It is composed of a composition containing 3 to 150 parts by weight of an inorganic filler, and a fitting portion between the battery case and the lid and an opening portion of the lid are
A battery characterized in that it is irradiated with ultraviolet rays in advance and then sealed with a curable sealing agent. 3. A battery having a structure in which a fitting portion between a battery case and a cover and an opening of an external terminal lead-out portion located on the cover are sealed with a hardening type sealing agent. At least one is (A) a polyolefin-based synthetic resin 30
(C) with respect to 100% by weight of the resin (A) + (B) and (B) 70 to 3% by weight of the rubbery substance and (B)
A composition comprising 0.05 to 40 parts by weight of carbon black and 3 to 150 parts by weight of an inorganic filler (D), wherein a fitting portion between the battery case and the cover and an opening of the cover are: A battery characterized in that it is irradiated with ultraviolet rays in advance and then sealed with a curable sealing agent. 4. The battery according to claim 1, wherein the sealing agent is at least one selected from an epoxy-based adhesive, a polyurethane-based adhesive, and a reactive acrylic-based adhesive.