Intrinsically safe battery with self recovery function

Abstract

The invention discloses an intrinsically safe battery with a self recovery function. The intrinsically safe battery comprises an non-intrinsically safe battery and a current limiting circuit connected between the non-intrinsically safe battery and a load, wherein the battery limit circuit comprises a bidirectional switching circuit, a current detection circuit, an overflowing and short circuit judging circuit, a pulse control circuit and a driving circuit, wherein the current detection circuit is connected with the bidirectional switch circuit; the overflowing and short circuit judging circuit is connected with the current detection circuit; the pulse control circuit is connected with the overflowing and short circuit judging circuit; the driving circuit is connected with the pulse control circuit; the input end of the overflowing and short circuit judging circuit is connected with a reference circuit; the pulse control circuit comprises a monostable trigger circuit which can enable the driving circuit to automatically recover connection again after the driving circuit is cut off. The intrinsically safe battery provided by the invention is simple in structure, is novel and reasonable in design, is convenient to implement, has a self recovery function, can be used fur improving the intrinsic safety output power, has high practicability, has a good using effect, and is convenient to popularize and use.

Description

Technical field [0001] The invention relates to an electronic product, in particular to an intrinsically safe battery used in dangerous environments such as coal mines, petroleum, chemical industries and the like. Background technique [0002] Intrinsically safe circuit refers to a circuit in which any electric spark or any thermal effect produced by the circuit in a normal state and a specified fault state cannot cause the specified explosive mixture to explode. Intrinsically safe circuits are an important part of electronic equipment. In some dangerous environments such as coal mines, petroleum, and chemical industries, uninterrupted power supply is required and additional backup batteries are required. However, due to the characteristics of the battery itself, once a short-circuit or other fault occurs, a large short-circuit current will be generated, and the resulting electric spark may detonate flammable and explosive gases, which obviously cannot meet the intrinsic safety r...

AI Technical Summary

Problems solved by technology

[0003] Existing energy limiting circuits usually use resistance current limiting and Zener tube or transistor voltage limiting to limit the maximum current and maximum voltage to achieve the purpose of energy limitation. This method cannot completely shut down the input power supply energy, and the loss is very large. , and some energy-limited circuits cannot recover automatically even if the current is lower than the limit requirement after the over-current or short-circuit fault starts.

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