CN104184130A - Battery short-circuit protection circuit - Google Patents
Battery short-circuit protection circuit Download PDFInfo
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- CN104184130A CN104184130A CN201310200335.3A CN201310200335A CN104184130A CN 104184130 A CN104184130 A CN 104184130A CN 201310200335 A CN201310200335 A CN 201310200335A CN 104184130 A CN104184130 A CN 104184130A
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- battery
- short circuit
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Abstract
The embodiment of the invention discloses a battery short-circuit protection circuit comprising an operational amplifier U1, a triode Q1, a relay K1, a battery BT, and resistors R1, R2, R3, R4, and R5. A first pin of the U1 is connected with one end of the R2; a second pin of the U1 is respectively connected with one end of the R3 and one end of the R4; a third pin of the U3 is respectively connected with the other end of the R3, one end of the R5, and a collector of the Q1; a base electrode of the Q1 is connected with the other end of the R5; an emitter of the Q1 is connected with a fourth pin of the K1; a first pin of the K1 is respectively connected with the other end of the R4 and a power ground; a second pin of the K1 is respectively connected with one end of the R1 and the other end of the R2; and a third pin of the K1 is connected with a negative electrode of a load circuit. According to the embodiment of the invention, when a short circuit phenomenon occurs at the output terminal of the battery, the electromagnetic relay works; and circuit opening is carried out at the input and output, so that the circuit is protected timely and the service life of the battery is prolonged. Moreover, less elements are used, the circuit is simple; and the cost is low.
Description
Technical field
The present invention relates to a kind of battery protecting circuit field, relate in particular to a kind of battery short circuit protective circuit.
Background technology
Prior art be by short circuit sensing component, carry out sensing loop output loading end whether short circuit to reach the object of protection battery.Load in output loading termination when normal power supply, this short circuit sensing component opens circuit, of-state voltage produces circuit and exports immediately a magnitude of voltage higher than reference voltage, makes voltage comparator export a low level signal, via after switch module, makes whole loop present initiate mode; And when output loading terminal shortcircuit, this short circuit sensing component conducting immediately, make of-state voltage produce circuit and export immediately a magnitude of voltage lower than reference voltage, make voltage comparator export a high levle signal, via after switch module, make whole loop present dead state.
Foregoing circuit device is many, and circuit is more complicated, and cost is higher.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of battery short circuit protective circuit is provided.Can reach in the time of the short circuit of battery output, electromagnetic relay work, by input and output open circuit, timely protective circuit, the object in the useful life of increase battery.
In order to solve the problems of the technologies described above, the embodiment of the present invention provides a kind of battery short circuit protective circuit, comprises operational amplifier U1, triode Q1, relay K 1, battery BT, resistance R 1, R2, R3, R4, R5; U1 the 1st pin is connected with R2 one end; U1 the 2nd pin is connected with R3 one end and R4 one end respectively; U1 the 3rd pin is connected with the R3 other end, R5 one end and Q1 collector electrode respectively; Q1 base stage is connected with the R5 other end; Q1 emitter is connected with K1 the 4th pin; K1 the 1st pin respectively with the R4 other end and power supply be connected; K1 the 2nd pin is connected with R1 one end and the R2 other end respectively; K1 the 3rd pin is connected with load circuit negative pole; BT is anodal to be connected with load circuit is anodal; BT negative pole is connected with the R1 other end.
Further, when system is normally worked, after the voltage that sampling resistor R1 obtains amplifies by U1, the voltage of output is less than the bias voltage of Q1, and makes triode Q1 cut-off, and relay K 1 is not worked; At battery short circuit in a flash, in loop, electric current becomes large, and by small resistor, R1 samples, and the voltage that enters operational amplifier U1 reaches the bias voltage of triode Q1, Q1 conducting, and relay K 1 work, and by switch make progress adhesive, now battery BT open circuit.
Further, described U1 model is LM324.
Further, described Q1 model is 2N3904.
Implement the embodiment of the present invention, there is following beneficial effect: the present invention can reach in the time of the short circuit of battery output, electromagnetic relay work; by input and output open circuit, timely protective circuit, the useful life of increase battery; and components and parts are few, circuit is simple, with low cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 be a kind of battery short circuit protective circuit of the present invention schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, a kind of battery short circuit protective circuit, comprises operational amplifier U1, triode Q1, relay K 1, battery BT, resistance R 1, R2, R3, R4, R5; U1 the 1st pin is connected with R2 one end; U1 the 2nd pin is connected with R3 one end and R4 one end respectively; U1 the 3rd pin is connected with the R3 other end, R5 one end and Q1 collector electrode respectively; Q1 base stage is connected with the R5 other end; Q1 emitter is connected with K1 the 4th pin; K1 the 1st pin respectively with the R4 other end and power supply be connected; K1 the 2nd pin is connected with R1 one end and the R2 other end respectively; K1 the 3rd pin is connected with load circuit negative pole; BT is anodal to be connected with load circuit is anodal; BT negative pole is connected with the R1 other end.
When system is normally worked, after the voltage that sampling resistor R1 obtains amplifies by U1, the voltage of output is less than the bias voltage of Q1, and in actual enforcement, bias voltage, more than 0.7V, and makes triode Q1 cut-off herein, and relay K 1 is not worked; At battery short circuit in a flash, in loop, electric current becomes large, and by small resistor, R1 samples, and the voltage that enters operational amplifier U1 reaches the bias voltage of triode Q1, Q1 conducting, and relay K 1 work, and by switch make progress adhesive, now battery BT open circuit.
Described U1 model is LM324.
Described Q1 model is 2N3904.
The present invention can reach in the time of the short circuit of battery output, electromagnetic relay work, and by input and output open circuit, timely protective circuit, the useful life of increase battery, and components and parts are few, and circuit is simple, with low cost.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosed is only preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to the claims in the present invention, still belongs to the scope that the present invention is contained.
Claims (4)
1. a battery short circuit protective circuit, is characterized in that, comprises operational amplifier U1, triode Q1, relay K 1, battery BT, resistance R 1, R2, R3, R4, R5; U1 the 1st pin is connected with R2 one end; U1 the 2nd pin is connected with R3 one end and R4 one end respectively; U1 the 3rd pin is connected with the R3 other end, R5 one end and Q1 collector electrode respectively; Q1 base stage is connected with the R5 other end; Q1 emitter is connected with K1 the 4th pin; K1 the 1st pin respectively with the R4 other end and power supply be connected; K1 the 2nd pin is connected with R1 one end and the R2 other end respectively; K1 the 3rd pin is connected with load circuit negative pole; BT is anodal to be connected with load circuit is anodal; BT negative pole is connected with the R1 other end.
2. battery short circuit protective circuit according to claim 1, is characterized in that, when system is normally worked, after the voltage that sampling resistor R1 obtains amplifies by U1, the voltage of output is less than the bias voltage of Q1, and makes triode Q1 cut-off, and relay K 1 is not worked; At battery short circuit in a flash, in loop, electric current becomes large, and by small resistor, R1 samples, and the voltage that enters operational amplifier U1 reaches the bias voltage of triode Q1, Q1 conducting, and relay K 1 work, and by switch make progress adhesive, now battery BT open circuit.
3. battery short circuit protective circuit according to claim 2, is characterized in that, described U1 model is LM324.
4. battery short circuit protective circuit according to claim 3, is characterized in that, described Q1 model is 2N3904.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310200335.3A CN104184130A (en) | 2013-05-27 | 2013-05-27 | Battery short-circuit protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310200335.3A CN104184130A (en) | 2013-05-27 | 2013-05-27 | Battery short-circuit protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104184130A true CN104184130A (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310200335.3A Pending CN104184130A (en) | 2013-05-27 | 2013-05-27 | Battery short-circuit protection circuit |
Country Status (1)
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| CN (1) | CN104184130A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2613917Y (en) * | 2003-04-04 | 2004-04-28 | 清华大学 | Protector for fuel battery |
| CN201479079U (en) * | 2009-08-28 | 2010-05-19 | 四川湖山电器有限责任公司 | Short-circuit protection device for power amplifier |
| CN201733078U (en) * | 2010-08-17 | 2011-02-02 | 全栋(南京)太阳能光伏有限公司 | Device for protecting terminal of battery |
| CN102104352A (en) * | 2010-09-28 | 2011-06-22 | 常州天合光能有限公司 | Bypass system of intelligent photovoltaic component power optimizer |
| CN201877797U (en) * | 2010-06-11 | 2011-06-22 | 岑显荣 | High-voltage power safety protection device of electric vehicle |
| CN202268733U (en) * | 2011-10-27 | 2012-06-06 | 福建农林大学 | Novel capacitor step-down constant-current charging circuit |
| CN102646960A (en) * | 2011-02-22 | 2012-08-22 | 北京科易动力科技有限公司 | Battery pack primary loop interface protection circuit and protection method |
| CN202602326U (en) * | 2012-05-09 | 2012-12-12 | 杭州勇华车业有限公司 | Charger with over-voltage protection |
| CN102931629A (en) * | 2012-10-16 | 2013-02-13 | 东南大学 | Quick relay protection method and circuit for current type transmitting signal input channel |
-
2013
- 2013-05-27 CN CN201310200335.3A patent/CN104184130A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2613917Y (en) * | 2003-04-04 | 2004-04-28 | 清华大学 | Protector for fuel battery |
| CN201479079U (en) * | 2009-08-28 | 2010-05-19 | 四川湖山电器有限责任公司 | Short-circuit protection device for power amplifier |
| CN201877797U (en) * | 2010-06-11 | 2011-06-22 | 岑显荣 | High-voltage power safety protection device of electric vehicle |
| CN201733078U (en) * | 2010-08-17 | 2011-02-02 | 全栋(南京)太阳能光伏有限公司 | Device for protecting terminal of battery |
| CN102104352A (en) * | 2010-09-28 | 2011-06-22 | 常州天合光能有限公司 | Bypass system of intelligent photovoltaic component power optimizer |
| CN102646960A (en) * | 2011-02-22 | 2012-08-22 | 北京科易动力科技有限公司 | Battery pack primary loop interface protection circuit and protection method |
| CN202268733U (en) * | 2011-10-27 | 2012-06-06 | 福建农林大学 | Novel capacitor step-down constant-current charging circuit |
| CN202602326U (en) * | 2012-05-09 | 2012-12-12 | 杭州勇华车业有限公司 | Charger with over-voltage protection |
| CN102931629A (en) * | 2012-10-16 | 2013-02-13 | 东南大学 | Quick relay protection method and circuit for current type transmitting signal input channel |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141203 |