CN102969701A - Battery protection and sparkle suppression circuit - Google Patents

Battery protection and sparkle suppression circuit Download PDF

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Publication number
CN102969701A
CN102969701A CN2012105107078A CN201210510707A CN102969701A CN 102969701 A CN102969701 A CN 102969701A CN 2012105107078 A CN2012105107078 A CN 2012105107078A CN 201210510707 A CN201210510707 A CN 201210510707A CN 102969701 A CN102969701 A CN 102969701A
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CN
China
Prior art keywords
connected
resistance
circuit
current
battery
Prior art date
Application number
CN2012105107078A
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Chinese (zh)
Inventor
黄廷磊
刘杰
覃志松
林科
张纪元
张姿
梁海
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桂林海博泰克电子科技有限公司
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Priority to CN2012105107078A priority Critical patent/CN102969701A/en
Publication of CN102969701A publication Critical patent/CN102969701A/en

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Abstract

The invention discloses a battery protection and sparkle suppression circuit. The battery protection and sparkle suppression circuit is additionally provided with a battery output end, and mainly consists of a current sampling circuit, a current limiting circuit, a voltage feedback circuit, a switching-off circuit and a voltage stabilizing and current limiting circuit. With the adoption of a manner of additionally arranging a battery protection circuit at the battery output end, the battery sparkle suppression circuit generated by a rapid discharging problem can be stopped. Meanwhile, the current can be rapidly limited when a short circuit generates; and the second short circuit can be prevented through load insulation, so that the external power supply can be automatically recovered after removing a load or a short circuit fault.

Description

A kind of battery protection and spark suppression circuit

Technical field

Battery technology of the present invention field is specifically related to a kind of battery protection and spark suppression circuit.

Background technology

Because external short circuit or internal short-circuit when occuring in battery; may transient large current discharge and produce electric spark; and the danger such as the generation meeting initiation fire of electric spark or blast, therefore if can set up the fail safe that battery protection and spark suppression circuit can greatly improve common batteries at common batteries.Yet; the scheme that solves at present battery short circuit protection and spark inhibition problem has following two kinds: a solution is for the mine intrinsic safety battery product; its method that mainly adopts is to turn-off the generation that the mode of exporting stops spark; and this mode is to the response speed of switch element, and the parasitic capacitance of circuit has higher requirement.Another kind of solution is for common intrinsic safety electric source, and the mode that its mode that mainly adopts is the resistance current limliting stops the generation of spark, and this mode not only can greatly reduce the load capacity of intrinsic safe battery, is difficult to satisfy power requirement; And need larger volume, be difficult to satisfy the requirement of volume.As seen, in view of the application of common batteries and the restriction of battery space, above-mentioned two kinds of solutions all can not be applied to solve the protection of common batteries and the problem that spark suppresses.

Summary of the invention

Technical problem to be solved by this invention provides a kind of battery protection and spark suppression circuit, and this circuit is set up on the battery output, the battery spark that produces in the time of can stoping repid discharge.

For addressing the above problem, a kind of battery protection and spark suppression circuit that the present invention is designed mainly are comprised of current sampling circuit, current-limiting circuit, voltage feedback circuit and breaking circuit.Wherein,

Current sampling circuit comprises resistance R 1 and the first level switch module U1.The two ends of resistance R 1 are connected with 2 inputs of the first level switch module U1 respectively.One end of resistance R 1 connects anode, and the other end connects the negative terminal of the diode D1 of current-limiting circuit.The output of the first level switch module U1 is connected to the anode of the diode D1 of current-limiting circuit.

Current-limiting circuit comprises the first field effect transistor F1, resistance R 2 and diode D1.Resistance R 2 and the two ends that are connected in parallel on diode D1.The grid of the first field effect transistor F1 is connected with the anode of diode D1, and source electrode is connected with battery cathode, and drain electrode is connected to the source electrode of the second field effect transistor F2 of breaking circuit.The negative terminal of diode D1 is connected to outside output cathode.

Voltage feedback circuit comprises resistance R 5, capacitor C 3, diode D2 and second electrical level modular converter U2.Resistance R 5 one ends are connected to outside output negative pole, and the other end is connected to the negative terminal of diode D2 and the input of second electrical level modular converter U2.The anode of diode D2 is connected another input and is connected battery cathode with second electrical level modular converter U2.Capacitor C 3 is connected in parallel on the two ends of diode D2.The output of second electrical level modular converter U2 links to each other with the negative terminal of the diode D3 of breaking circuit.

Breaking circuit comprises the second field effect transistor F2, resistance R 6, resistance R 7 and diode D3.The grid of field effect transistor F2 is connected with the anode of diode D3.Resistance R 7 is connected in parallel on the two ends of diode D3.Resistance R 6 one ends link to each other with the anode of diode D3, and the other end links to each other with battery cathode.

Further, above-mentioned battery protection and spark suppression circuit also include the voltage stabilizing current-limiting circuit, and this voltage stabilizing current-limiting circuit comprises resistance R 8 and voltage-stabiliser tube D5.The anode of voltage-stabiliser tube D5 links to each other with outside output negative pole, and negative terminal links to each other with an end of resistance R 8, and the other end of resistance R 8 is connected to outside output cathode.

In the such scheme, the negative terminal of diode D1 preferably also is connected to outside output cathode via a diode D4.

In the such scheme, the positive and negative electrode two ends of battery preferably are parallel with capacitor C 1 and/or capacitor C 2, and capacitor C 1 and capacitor C 2 are each other and are connected in parallel.

In the such scheme, an end of resistance R 1 preferably also is connected to anode via a fuse FUSE1.

The present invention adopts at the battery output increases the battery spark suppression circuit that the mode of battery protecting circuit stops the repid discharge problem to produce.Simultaneously when short circuit occurs, rapid Limited Current, and with load isolation, prevent second short circuit after load or short trouble remove, recovers supplying power for outside automatically.

Compared with prior art, the present invention has adopted current detecting and the current limliting scheme of little power consumption, and the energy loss when making the high-power power supply of intrinsic safe battery drops to minimum.Adopted simultaneously the mode of semiconductor current limiter and the protected mode of blocking output, the spark when solving repid discharge suppresses problem, after protective circuit triggers, in Limited Current, cuts off rapidly output loop, prevents second short circuit.This protective circuit has successfully solved the intrinsic safety problem under the high-power powerup issue of battery and the short-circuit conditions; after having increased spark protection inhibition circuit, under short-circuit conditions, circuit is Limited Current and externally output of cut-out rapidly; after short trouble removes, can automatic recovery of power supply.Simultaneously, this circuit has the advantage of little power consumption, small size, can be integrated in the battery container easily.

Description of drawings

Fig. 1 is the circuit theory diagrams of a kind of battery protection and spark suppression circuit.

Embodiment

The circuit of a kind of battery protection and spark suppression circuit as shown in Figure 1, it mainly is comprised of current sampling circuit, current-limiting circuit, voltage feedback circuit, breaking circuit and voltage stabilizing current-limiting circuit five parts.Wherein,

Current sampling circuit has comprised resistance R 1 and the first level switch module U1.Resistance R 1 one ends of current sampling circuit link to each other with anode by a fuse FUSE1, and the other end connects the anode of a diode D4.Resistance R 1 two ends are connected with 2 voltage input ends of the first level switch module U1.The output of the first level switch module U1 is connected to the resistance R 2 of current-limiting circuit and the anode of diode D1.When load current moment increase, electric current I 1 increase by resistance R 1 increases the pressure drop at resistance R 1 two ends, if this voltage reaches the protection threshold value, then exports control level Vc.

Current-limiting circuit comprises the first field effect transistor F1, resistance R 2 and diode D1.The negative terminal of the diode D1 of current-limiting circuit links to each other with the end of an end of resistance R 2 with the resistance R 1 of current sampling circuit.The grid of the first field effect transistor F1 connects the other end of diode D1 anode and resistance R 2, and source electrode is connected with battery cathode, and drain electrode is connected to the source electrode of the second field effect transistor F2 of breaking circuit.After field effect transistor F1 receives control level Vc, turn-off immediately, thus moment the cut off circuit path, finish the Current Control function.

Voltage feedback circuit comprises resistance R 5, capacitor C 3, diode D2 and second electrical level modular converter U2.One end of the resistance R 5 of voltage feedback circuit is connected to outside output negative pole; The other end of resistance R 5 is connected to an end of capacitor C 3, the negative terminal of diode D2 and the input of second electrical level modular converter U2.Another input of the anode of the other end of capacitor C 3, diode D2 and second electrical level modular converter U2 is connected with battery cathode.The output of second electrical level modular converter U2 is connected with the negative terminal of the resistance R 7 of breaking circuit and diode D3.If load still is connected in output, then the voltage of outside output negative pole OGND raises, and to capacitor C 3 chargings, when capacitor charging during to threshold voltage, second electrical level modular converter U2 action is from the output output Vc2 of second electrical level modular converter U2 through resistance R 5.

Breaking circuit comprises field effect transistor F2, resistance R 6, resistance R 7 and diode D3.The grid of the second field effect transistor F2 of breaking circuit is connected with the positive pole of resistance R 7 one ends and diode D3.One termination battery cathode of resistance R 6, an end is connected with resistance R 7.The drain electrode of the second field effect transistor F2 is connected to outside output negative pole.After the second field effect transistor F2 receives control level Vc2, turn-off immediately, make negative pole of output end keep blocking state, when load removes or after short circuit removed, F2 just opened again, thereby guarantees when load current sharply increases or is short-circuited, carry out current limliting, suppress the generation of spark, and cut off load, prevent from again producing spark.

The voltage stabilizing current-limiting circuit comprises resistance R 8 and voltage-stabiliser tube D5.The positive pole of voltage-stabiliser tube D5 links to each other with outside output negative pole, and the negative terminal of voltage-stabiliser tube D5 links to each other with an end of resistance R 8.The other end of resistance R 8 is connected to outside output cathode.The both positive and negative polarity voltage of exporting when the outside is higher than the burning voltage of voltage-stabiliser tube D5, voltage-stabiliser tube D5 conducting, thereby the magnitude of voltage of assurance output.

In addition, the positive and negative electrode two ends of battery preferably are parallel with capacitor C 1 and capacitor C 2, and capacitor C 1 and capacitor C 2 are each other and are connected in parallel.Anode voltage is connected to resistance R 1 through behind the self-healing fuse Fuse1.

Workflow of the present invention:

At first behind the battery battery cathode voltage process resettable fuse Fuse1, carry out voltage stabilizing by capacitor C 1, capacitor C 2, after diode D4 rectification, output to outside output cathode Vout.Battery cathode BGND outputs to outside output negative pole OGND after through the first field effect transistor F1 and the second field effect transistor F2.When load current moment increase, electric current I 1 increase by resistance R 1 increases the pressure drop at resistance R 1 two ends.If reach the protection threshold value, then export control level to current-limiting circuit, the first field effect transistor F1 is turn-offed immediately, thus moment the cut off circuit path, finish the Current Control function.Overweight or be short-circuited when load, when outside output voltage was sharply descended, diode D1 conducting descended rapidly the first field effect transistor F1 control pole tension, outside output negative pole is turn-offed, thereby battery and external loading are isolated.If load still is connected in output, then the voltage of outside output negative pole raises, resistance R 5 through voltage feedback circuit is charged to capacitor C 3, when capacitor C 3 charges to threshold voltage, second electrical level modular converter U2 action, the second field effect transistor F2 is turn-offed, make outside output negative pole keep blocking state, when load removes or after short circuit removed, the second field effect transistor F2 just opened again, thereby guarantees when load current sharply increases or is short-circuited, carry out current limliting, suppress the generation of spark, and cut off load, prevent from again producing spark.

Claims (5)

1. a battery protection and spark suppression circuit is characterized in that: mainly be comprised of current sampling circuit, current-limiting circuit, voltage feedback circuit and breaking circuit; Wherein,
Current sampling circuit comprises resistance R 1 and the first level switch module U1; The two ends of resistance R 1 are connected with 2 inputs of the first level switch module U1 respectively; One end of resistance R 1 connects anode, and the other end connects the negative terminal of the diode D1 of current-limiting circuit; The output of the first level switch module U1 is connected to the anode of the diode D1 of current-limiting circuit;
Current-limiting circuit comprises the first field effect transistor F1, resistance R 2 and diode D1; Resistance R 2 and the two ends that are connected in parallel on diode D1; The grid of the first field effect transistor F1 is connected with the anode of diode D1, and source electrode is connected with battery cathode, and drain electrode is connected to the source electrode of the second field effect transistor F2 of breaking circuit; The negative terminal of diode D1 is connected to outside output cathode;
Voltage feedback circuit comprises resistance R 5, capacitor C 3, diode D2 and second electrical level modular converter U2; Resistance R 5 one ends are connected to outside output negative pole, and the other end is connected to the negative terminal of diode D2 and the input of second electrical level modular converter U2; The anode of diode D2 is connected another input and is connected battery cathode with second electrical level modular converter U2; Capacitor C 3 is connected in parallel on the two ends of diode D2; The output of second electrical level modular converter U2 links to each other with the negative terminal of the diode D3 of breaking circuit;
Breaking circuit comprises the second field effect transistor F2, resistance R 6, resistance R 7 and diode D3; The grid of field effect transistor F2 is connected with the anode of diode D3; Resistance R 7 is connected in parallel on the two ends of diode D3; Resistance R 6 one ends link to each other with the anode of diode D3, and the other end links to each other with battery cathode.
2. a kind of battery protection according to claim 1 and spark suppression circuit, it is characterized in that: also further include the voltage stabilizing current-limiting circuit, this voltage stabilizing current-limiting circuit comprises resistance R 8 and voltage-stabiliser tube D5; The anode of voltage-stabiliser tube D5 links to each other with outside output negative pole, and negative terminal links to each other with an end of resistance R 8, and the other end of resistance R 8 is connected to outside output cathode.
According to claim 1 with 2 described a kind of battery protection and spark suppression circuits, it is characterized in that: the negative terminal of diode D1 is connected to outside output cathode through a diode D4.
According to claim 1 with 2 described a kind of battery protection and spark suppression circuits, it is characterized in that: the positive and negative electrode two ends of battery are parallel with capacitor C 1 and/or capacitor C 2, and capacitor C 1 and capacitor C 2 are each other and are connected in parallel.
According to claim 1 with 2 described a kind of battery protection and spark suppression circuits, it is characterized in that: an end of resistance R 1 also is connected to anode via a fuse FUSE1.
CN2012105107078A 2012-11-30 2012-11-30 Battery protection and sparkle suppression circuit CN102969701A (en)

Priority Applications (1)

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Citations (7)

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Publication number Priority date Publication date Assignee Title
US3721887A (en) * 1971-11-24 1973-03-20 American Telephone & Telegraph Battery protection circuit
US7005832B2 (en) * 2002-02-18 2006-02-28 Creator Teknisk Utveckling Ab Device for a battery charger
CN101577419A (en) * 2009-06-22 2009-11-11 安徽摆客动力技术有限公司 Selflocking direct current supply short circuit protection circuit
CN101908755A (en) * 2009-06-02 2010-12-08 鸿富锦精密工业(深圳)有限公司;鸿海精密工业股份有限公司 Overdischarge protector for battery
CN101944715A (en) * 2010-08-31 2011-01-12 深圳拓邦股份有限公司 Load short-circuit protection circuit
CN202424257U (en) * 2012-01-20 2012-09-05 深圳麦格米特电气股份有限公司 Battery charging circuit
CN203103928U (en) * 2012-11-30 2013-07-31 桂林海博泰克电子科技有限公司 Battery protection and spark suppression circuit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721887A (en) * 1971-11-24 1973-03-20 American Telephone & Telegraph Battery protection circuit
US7005832B2 (en) * 2002-02-18 2006-02-28 Creator Teknisk Utveckling Ab Device for a battery charger
CN101908755A (en) * 2009-06-02 2010-12-08 鸿富锦精密工业(深圳)有限公司;鸿海精密工业股份有限公司 Overdischarge protector for battery
CN101577419A (en) * 2009-06-22 2009-11-11 安徽摆客动力技术有限公司 Selflocking direct current supply short circuit protection circuit
CN101944715A (en) * 2010-08-31 2011-01-12 深圳拓邦股份有限公司 Load short-circuit protection circuit
CN202424257U (en) * 2012-01-20 2012-09-05 深圳麦格米特电气股份有限公司 Battery charging circuit
CN203103928U (en) * 2012-11-30 2013-07-31 桂林海博泰克电子科技有限公司 Battery protection and spark suppression circuit

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Application publication date: 20130313

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