JP2010268611A - Explosionproof battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that only a battery of small capacity can be used since it becomes difficult to maintain explosionproof performance in the latest battery of large capacity due to occurrence of explosion by gas occurring at the time of short-circuit, occurrence of sparks and a high temperature by large current and ignition to an explosive gas although a resistor and a current limiting circuit are installed for suppressing current from the battery and a request for verifying that explosionproof performance is not affected is given even if a battery single body before the resistor and the current limiting resistor is short-circuited since a creeping distance of the battery is small in the case when the battery is made into an intrinsically safe explosionproof structure. <P>SOLUTION: A battery part is set to be a pressureproof explosionproof structure, a sand-packing explosionproof structure or a resin filling explosionproof structure. Thus, necessity of a short-circuit test of plus/minus terminals of a battery is eliminated, and large current/large temperature do not occur in the battery. Thus, the battery of high capacity can be used. Consequently, high output and long time use of an explosionproof apparatus become possible. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a battery for an explosion-proof device used in a hazardous area, and relates to efficiently exhibiting battery performance while maintaining explosion-proof performance.

Portable explosion-proof electrical equipment used in hazardous locations often has an intrinsically safe explosion-proof structure.
However, when making the battery an intrinsically safe explosion-proof structure, there is a short circuit test of the battery and it is difficult to clear it when the capacity increases.

  The main body has an intrinsically safe explosion-proof structure, and if only the battery part has a pressure-proof explosion-proof structure, sand-clogged explosion-proof structure, or resin-filled explosion-proof structure, it avoids the high-risk tests required for the battery with an intrinsically safe explosion-proof structure, and is easily explosion-proof. It can be.

Japanese Patent Application No. 8-265509

Industrial Electrical Equipment Explosion Proof Guidelines (Technical Guidelines 2008 Consistent with International Standards) Hazardous Locations refer to locations where flammable gas or flammable liquid vapor (hereinafter referred to as explosive gas) exists or may exist. With explosion-proof construction, electrical equipment is stored in a sturdy container, and electrical equipment is stored even if an explosive gas explosion occurs inside the container at the electrical spark or high temperature part of the electrical equipment against the explosive gas. A structure in which the container can withstand the explosion pressure and does not ignite the explosive gas around the equipment. Intrinsically safe explosion-proof structure means a structure that prevents an explosive gas from being ignited even at high temperatures by assuming a failure of an electric device. Sand-filled explosion-proof structure is a structure that isolates electrical equipment from explosive gas by covering it with sand. The resin-filled explosion-proof structure is a structure that isolates electrical equipment from explosive gas by covering it with resin.

  In the case of an intrinsically safe explosion-proof structure, a resistor and current limiting circuit are provided to suppress the current from the battery, but the creepage distance between the positive and negative of the battery is small, so the battery alone before reaching the resistance or current limiting resistor It is necessary to confirm that the explosion-proof performance is not affected even if the short circuit occurs.

Even if a current limiting resistor is provided, it is necessary to perform a short-circuit test before the current limiting resistor. Therefore, in order to prevent ignition by a spark, the whole is potted with resin so that it does not come into contact with surrounding explosive gas.
However, due to overheating of the battery itself due to a large current, the surface of the potting becomes hot, and there is a risk of ignition at the temperature, and it is difficult to select a potting material that can withstand the high temperature.

  Also, in recent high-capacity batteries, the gas generated from the inside of the battery at the time of a short circuit may explode due to sparks due to large currents or high temperatures, destroying the potting material and coming into contact with surrounding explosion hazard gases, so it has explosion-proof performance. It has been difficult to maintain. Therefore, only a small capacity battery could be used.

  The battery part is made of an explosion-proof structure, sand-packed explosion-proof structure, or resin-filled explosion-proof structure that does not require a short circuit test for the battery itself.

By making the battery part explosion-proof, sand-filled, or resin-filled, the need for a short circuit test on the positive and negative terminals of the battery is eliminated, so that a battery with a high capacity can be used. Become. Therefore, it is possible to increase the output of the explosion-proof device and use it for a long time.

In the case of the explosion-proof construction, since there is no problem with the generation of sparks in the container, the need for potting is also eliminated.

It is an external view of the portable electric equipment using this invention. It is a block diagram of the present invention

(First Example of the Present Invention) A first embodiment of the present invention will be described below with reference to FIG.
FIG. 1 shows an overall circuit configuration diagram of an intrinsically safe explosion-proof portable radio device according to the present embodiment. In the figure, the explosion-proof battery 8 according to the present embodiment is housed in a container 2 having a pressure-proof explosion-proof structure, a sand-filled explosion-proof structure, or a resin-filled explosion-proof structure together with a current limiting circuit 7. The connection terminal 10 is an intrinsically safe explosion-proof circuit due to the provision of the current limiting circuit 7, and since this portion does not have the energy to explode even if short-circuited, it can be a bare terminal. The terminal 12 is a terminal for charging and is used only in a non-hazardous area.

The main board 3, the antenna 4, and the keyboard 5 are collected in one container 1 and connected to the connection terminal 10. The ear microphone set 6 is connected via an ear microphone terminal 11 when necessary. These are all intrinsically safe.
The backflow prevention diode 12 is for preventing a current flowing out from the charging terminal 9.

  FIG. 1 is an example of a portable explosion-proof electrical device. The main body 1 has an intrinsically safe explosion-proof structure, and the explosion-proof battery 2 has a pressure-proof explosion-proof structure, a sand-filled explosion-proof structure, or a resin-filled explosion-proof structure.

  Since the capacity of the battery can be increased, the battery can be used for a long time. Therefore, the field in which a mobile phone, an emergency call device, a portable lighting device, a disaster prevention device, and the like can be used becomes wide.

1 body
2 Battery part
3 Main board (built-in antenna)
4 display section
5 key
6 Ear microphone set
7 Current limit circuit
8 battery
9 Charging terminal
10 Connection terminal
11 Ear microphone terminal
12 Backflow prevention diode

Claims (2)

    Explosion-proof electrical equipment characterized by the fact that only the battery supplied to the intrinsically safe explosion-proof electrical equipment used in hazardous areas has a pressure-proof explosion-proof construction, sand-clogging explosion-proof construction, or resin-filled explosion-proof construction     Electrical equipment characterized by the fact that some circuits including batteries of intrinsically safe explosion-proof electrical equipment used in hazardous areas have explosion-proof construction, sand clogging construction, or resin-filled construction