JPH04206452A - Nonqueous electrolyte battery - Google Patents

Abstract

PURPOSE:To quickly report an abnormal temperature rise to the user of an apparatus when it occurs by sealing and fixing an odor component or an odor component generating agent on the surface of a battery constituting member where the generated heat is transmitted with a heat-melting material. CONSTITUTION:A sealing plate 1 concurrently serving as a positive electrode terminal is provided on a battery can in the insulated state via an insulating gasket 2 when the opening edge of an outer can 3 concurrently serving as a negative electrode terminal is caulked. A diethyl thioether coating layer 4 serving as an odor component is coated on the recess of the sealing plate 1 in advance, a film 5 of polyethylene resin with the thickness 50mum serving as a sealing member is formed and fixed on the sealing plate 1. When a test battery can is heated and the surface temperature of the battery can reaches the fixed temperature, the polyethylene resin film 5 serving as the sealing member is melted, diethyl thioether is scattered, and the odor peculiar to the sealed thioether drifts in the surrounding.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a battery including a negative electrode, a positive electrode, and a power generation element made of a non-aqueous electrolyte, and particularly relates to improvements in safety measures thereof.

(Prior Art and its Problems) Various structures are known for batteries that include a negative electrode, a positive electrode, and a power generation element made of a non-aqueous electrolyte. Such batteries are widely used as memory storage power sources for electronic devices, power sources for driving portable devices, and the like.

By the way, in such non-aqueous electrolyte batteries, the electrolyte is flammable, so if the pressure or temperature inside the battery case rises abnormally due to an unexpected accident such as an external short circuit or an internal short circuit, the battery may may cause ignition, explosion, etc.

Therefore, if an abnormal situation such as an external short circuit or an internal short circuit occurs, immediately remove the battery and stop using it. It is necessary to l-.

However, since the battery is usually loaded in a location that cannot be seen from the outside, it is very difficult to immediately detect the occurrence of an abnormal situation. There have been many reports that this has caused delays in detecting battery abnormalities, causing accidents such as fires.

Therefore, non-aqueous electrolyte batteries are equipped with a safety mechanism that releases the increased internal pressure in order to prevent the battery can from exploding due to an abnormal increase in internal battery pressure. This safety mechanism is
It is classified into two types: destructive type and non-destructive type. Destructive types have a structure that causes cracks and failures in the safety valve, including (1) those in which hermetic glass sealing parts crack due to increased internal pressure (Utility Model Application No. 2-12159);
2) The flexible information plate that closes the gas vent of the sealing plate is deformed upward due to the rising internal pressure, and is destroyed by the cutting blade provided on the terminal plate located above the flexible information plate (Japanese Patent Application Laid-Open No. (No. 189855), (3) A method is known in which a part of the outer can is thinned and the thin wall part breaks before the entire outer can is destroyed by the rising internal pressure. On the other hand, the non-destructive type is a reset type that temporarily discharges the abnormally pressurized gas to the outside and closes the valve when the internal pressure drops (IEICE, Corona Inc., ``User's Battery Reader”, p.
152.1911g) is known.

However, in these conventional techniques, although there was an idea of taking stabilization measures for the battery, there was no idea of promptly notifying the device user of an abnormal situation and having them take safe measures. Also, no measures were taken to prevent abnormal temperature rises that could directly lead to ignition. Furthermore, when the safety valve operates to release the internal pressure, the non-aqueous electrolyte inside the battery may leak to the outside. If the liquid is left in a leaking state like this, it will have a significant negative impact on the equipment used, even if it does not cause a fire.

Therefore, it is clear that in non-aqueous electrolyte batteries, it is important to discover battery abnormalities in the ninth period.

(Problem of the Invention) An object of the present invention is to provide a battery equipped with a notification mechanism that allows a device user to promptly detect an abnormal temperature rise in the battery.

(Means for Solving the Problems) The present inventors have conducted extensive research to solve the above problems, and as a result, have completed the present invention.

That is, according to the present invention, on the surface of the battery component that contacts or communicates with the atmosphere and to which heat generated inside the battery is transferred,
Provided is a non-aqueous electrolyte battery characterized in that an odor component or an odor component generator is sealed and fixed using a hot-melt hostile substance.

In the battery of the present invention, the position where the odor component is sealed and fixed may be any position as long as it is on the surface of the battery component that contacts or communicates with the atmosphere and through which heat generated inside the battery is transferred. It can be placed on the outer surface of the battery can, but preferably on the surface of the sealing plate.

The material used for sealing the odor component is a heat-melting substance, as long as it does not melt under normal battery usage conditions but melts when an abnormal condition occurs.
Any substance that melts at 20-160°C can be used. As such substances, polyolefin resins such as polyethylene, polybutene-1, and poly-5-methylhexene-1, and thermoplastic substances such as polyhexamethylene terephthalate and polypentamethylene terephthalate are preferably used.

The odor component used is one that produces a strong aroma or bad odor even in minute amounts. Generally, it is preferable to use something that produces a bad odor so that its odor can be easily detected. Examples of such odor components include, in addition to various fragrances, various sulfur compounds such as mercaptans and thioethers, various nitrogen compounds such as ammonia, amines, pyridine, and imidazole, organic phosphines, phosphorous esters, and phosphoric esters. Examples include aldehyde compounds such as phosphorus compounds, aliphatic aldehydes, aromatic aldehydes, and heterocyclic aldehydes.

The odor component used in the present invention can be gaseous, liquid, or solid, but preferably exhibits a liquid state at room temperature to 160°C. ) B. Although the Q component is used as an object to be sealed, it can also be used as an object to be sealed in the form of an odor component generator. The odor component generator is
It refers to a substance that gradually releases odor components, and such substances include solutions of odor components, porous materials impregnated with or adsorbed with odor components or their solutions, and gels containing odor components or their solutions. Examples include odor components contained in substances such as odor components, and encapsulated products containing odor components or solutions thereof.

In this case, examples of the above-mentioned porous material include activated carbon, silica, alumina, magnesia, diatomaceous material, paper, and nonwoven fabric. As the substance that provides the glue-like substance, polymeric substances such as carboxymethyl cellulose, sodium alginate, and sodium polyacrylate are used. A polymeric material such as gelatin is used as the encapsulating material.

A method for sealing and fixing an odor component or an odor component generating agent on the surface of a predetermined battery component using a heat-melting substance is to surround the odor component or an odor-component generating agent with a heat-melting substance and immobilize it. Any method may be used as long as it does so, and examples include the methods shown below.

(1) A method in which a coating liquid containing an odor component or an odor component generating agent is applied to a predetermined surface and dried, and then a coating liquid of a heat-melting substance is applied or a film of a heat-melting substance is adhered thereon.

(2) A method in which a film of a heat-fusible substance containing an odor component or an odor-component generating agent is adhered to a predetermined surface, and if necessary, a film of a heat-fusible substance is further formed thereon.

(3) Create a laminated film with an odor component or an odor component generating agent interposed between two films, at least one of which is a film of a heat-fusible substance, and place the film with the heat-fusible substance film side on top. method of adhering to a given surface.

(Example) Next, an example of the present invention will be explained using drawings. Figure B 1M shows an explanatory cross-section of a circle 1': type 1 non-aqueous electrolyte battery, which is an example of the present invention. . In No. 1, I is insulated by caulking the opening edge of the outer can 3 which also serves as the positive electrode terminal and the negative electrode terminal via the insulating gasket 2. is provided on the top of the battery can. 4 is a coating layer of diethyl thioether, which is an odor component, and is coated in advance on the concave portion of 1 treated as f:l[], and then a sealing member is applied on top of the coating layer to form a polyethylene resin with a thickness of 5t)) 1 m.
It is fixed on the sealing plate by forming a coating 5 of.

As the test battery can is heated, when the surface temperature of the battery can reaches 138°C, the polyethylene resin coating 5, which is the sealing member, melts, diethyl thioether escapes, and the seal is no longer sealed. The unique odor of Tasen One Chill wafted around.

(Effect of the invention) In the battery of the present invention, when the temperature inside the battery case rises abnormally due to an unexpected accident such as an external short circuit or an internal short circuit, disasters such as fire may occur. Odor components float around, making it easy to detect abnormal battery conditions. Therefore, the present invention greatly contributes to safety measures when using non-aqueous electrolyte batteries.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory cross-sectional view of a cylindrical non-aqueous electrolyte battery according to an embodiment of the present invention. 1. Sealing plate, 2. Insulating gasket, 3. Exterior can, 4. Odor component coating layer, 5. Heat-melting sealing member coating.

Claims (1)

[Claims] (1) An odor component or an odor component generating agent is sealed and fixed using a heat-melting substance on the surface of a battery component that contacts or communicates with the atmosphere and through which heat generated inside the battery is transferred. non-aqueous electrolyte battery.