CN106160071B - Short-circuit protection circuit - Google Patents
Short-circuit protection circuit Download PDFInfo
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- CN106160071B CN106160071B CN201610502888.8A CN201610502888A CN106160071B CN 106160071 B CN106160071 B CN 106160071B CN 201610502888 A CN201610502888 A CN 201610502888A CN 106160071 B CN106160071 B CN 106160071B
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- 238000005070 sampling Methods 0.000 claims abstract description 28
- 230000000295 complement effect Effects 0.000 claims description 22
- 230000003287 optical effect Effects 0.000 claims description 15
- 239000003381 stabilizer Substances 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000005669 field effect Effects 0.000 claims description 11
- 239000004065 semiconductor Substances 0.000 claims description 11
- 230000003750 conditioning effect Effects 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H02J7/0026—
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The present invention provides a kind of short-circuit protection circuit; it is related to power safety technology field; the circuit includes: sampling unit, comparing unit and short-circuit protection unit; the sampling unit; for acquiring the electric current of equalizing circuit to be protected; and it exports to the comparing unit; the comparing unit; for by the electric current of the equalizing circuit compared with preset current threshold; if judgement knows that the electric current of the equalizing circuit is greater than preset current threshold, the connection that the short-circuit protection unit disconnects the equalizing circuit and DC power supply is controlled.Benefit electric-type equalizing circuit provided by the invention can be protected fast and effeciently and mend electric-type equalizing circuit, improve the safety of circuit.
Description
Technical field
The present invention relates to power safety technology fields, and in particular to a kind of short-circuit protection circuit.
Background technique
Since lithium battery monomer is in the difference of the manufacturing, leading to lithium battery, there are consistency problems when in groups, and
Due to the temperature difference of battery pack in use, cause lithium battery group with the increase of cycle-index, this inconsistency
It is gradually increased, it is therefore desirable to which equalizing circuit carries out equilibrium to it, improves the consistency of battery pack.
Balanced way is divided into active equalization and passively equilibrium, and for active equalization, using at present at most is that benefit electric-type is equal
Weighing apparatus.There is the risk of short-circuit failure in equalizing circuit, it is therefore desirable to protect to it when in use.At present for battery balanced
Short-circuit protection has the following problems:
1, when passing through software control, the short-circuit response time is longer, damages to equalizer switch device and battery pack itself,
The failure of software simultaneously will lead to equalizing circuit, and there are unprotect states.
2, by the reliability of equalizing circuit itself, equalizing circuit short-circuit failure is caused to be in uncontrollable state, it may
Cause lithium battery group charge and discharge safety issue.
Summary of the invention
(1) the technical issues of solving
The technical problem to be solved by the present invention is how fast and effeciently to protect benefit when mending the short circuit of electric-type equalizing circuit
Electric-type equalizing circuit and battery pack.
(2) technical solution
To solve the above problems, the present invention provides a kind of short-circuit protection circuit, including sampling unit, comparing unit and
Short-circuit protection unit；
Wherein, the sampling unit for acquiring the electric current of equalizing circuit to be protected, and is exported to described relatively more single
Member；
The comparing unit, for by the electric current of the equalizing circuit compared with preset current threshold, if judgement know
The electric current of the equalizing circuit is greater than preset current threshold, then control the short-circuit protection unit disconnect the equalizing circuit with
The connection of DC power supply；
The short-circuit protection unit includes driving circuit and protective switch of the short circuit；
The protective switch of the short circuit includes N-channel enhancement mode MOSFET；
The driving circuit includes the first dropping resistor；First shunt resistance；First current-limiting resistance；Supplying resistance；Pressure stabilizing
Pipe；Class B push-pull formula complementary symmetry power amplifier circuit；
The anode of the voltage-stabiliser tube is connected with the source electrode of the metal-oxide-semiconductor field effect transistor；The cathode of the voltage-stabiliser tube and the MOS
The grid of field-effect tube is connected by first dropping resistor；The voltage-stabiliser tube the first shunt resistance in parallel；The voltage-stabiliser tube
Cathode be connected with the output end of the class B push-pull formula complementary symmetry power amplifier circuit by the first current-limiting resistance；
The input terminal of the class B push-pull formula complementary symmetry power amplifier circuit is connected to power supply by the supplying resistance；
The input terminal of the input terminal connection fault control signal of the class B push-pull formula complementary symmetry power amplifier circuit.
Preferably, the supplying resistance passes through pull down resistor ground terminal.
Preferably, the driving circuit further includes light emitting diode；The anode and class B push-pull formula of the light emitting diode
The output end of complementary symmetry power amplifier circuit is connected by the second dropping resistor；The minus earth end of the light emitting diode.
Preferably, the class B push-pull formula complementary symmetry power amplifier circuit includes a NPN triode and tri- pole PNP
Pipe；The emitter of the NPN triode is electric as class B push-pull formula amplification after connecting with the emitter of the PNP triode
The output end on road；The base stage of the NPN triode is put after connecting with the base stage of the PNP triode as the class B push-pull formula
The input terminal of big circuit；The collector of the NPN triode connects power supply；The grounded collector end of the PNP triode.
The driving circuit further includes diode, and the diode is in parallel with first current-limiting resistance, the diode
Anode be connected with the cathode of the light emitting diode, the cathode of the diode and the class B push-pull formula complementary symmetry power amplifier
The output end of circuit is connected.
The euqalizing current sample circuit includes conditioning resistance；First filter capacitor；Seek poor amplifying circuit；Limiter diode
Group；
It is described that seek poor amplifying circuit include integrated operational amplifier；
The conditioning resistance is connected to described ask between the first input end of poor amplifying circuit and the second input terminal；It is described to ask poor
Second input terminal of amplifying circuit is grounded by first filter capacitor；The limiter diode is connected to the integrated fortune
Between the non-inverting input terminal and inverting input terminal for calculating amplifier, double limiting diode is constituted；
The current signal acquired from sampling unit exports sampling by the conditioning of conditioning resistance and after asking poor amplifying circuit to amplify
Electric current is to comparing unit.
Preferably, the integrated operational amplifier uses simplex power mode.
The comparing unit includes euqalizing current threshold circuit；DC balance resistance；Voltage comparator；Pull-up resistor；The
Two filter capacitors；Third dropping resistor；4th dropping resistor；Second shunt resistance；Thyristor；Optical coupled switch；
The euqalizing current threshold circuit includes first resistor and second resistance, and one end of the first resistor connects electricity
Source, the other end connect second resistance；The other end ground terminal of the second resistance；
There are four pins for the optical coupled switch tool；
Position between the inverting input terminal of the voltage comparator and the first resistor and the second resistance is connected；
The DC balance resistance is connect with the normal phase input end of the voltage comparator；Described pull-up resistor one end connects to power supply,
One end is connect with the output end of the voltage comparator；The output end of the voltage comparator by the third dropping resistor with
The gate circuit transistor gate connection；Second filter capacitor one terminates the gate circuit transistor gate, other end ground terminal；Described second
Shunt resistance one end connects the gate pole of thyristor, other end ground terminal；The minus earth end of the thyristor, anode pass through described
4th dropping resistor is connected with the second pin of the optical coupled switch.
Preferably, the comparing unit further includes light emitting diode and the 5th dropping resistor；The sun of the light emitting diode
Pole is connected by the 5th dropping resistor with the second pin of the optical coupled switch, the cathode of the light emitting diode and brilliant lock
The anode of pipe connects.
(3) beneficial effect
The present invention provides a kind of short-circuit protection circuit, sampling unit, comparing unit and short-circuit protection unit therein
It is designed using devices at full hardware, is not related to software section, avoid the problem of software failure causes short-circuit protection to fail.
In addition, realizing the protection to equalizing circuit by control of the driving circuit to protective switch of the short circuit on-off, that is, working as
When equalizing circuit short circuit, equalizing circuit can be cut off immediately, and the response time is short.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is according to short-circuit protection circuit embodiment functional block diagram provided by the invention；
Fig. 2 be according to driving circuit provided by the invention on circuit system embodiment circuit diagram；
Fig. 3 is according to sampling unit embodiment electrical block diagram provided by the invention；
Fig. 4 is according to comparing unit embodiment electrical block diagram provided by the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
As shown in Figure 1, the present invention provides a kind of embodiment of short-circuit protection circuit, including sampling unit, comparing unit,
Driving circuit and protective switch of the short circuit；
Sampling unit carries out current acquisition by electric current of the sampling resistor to equalizing circuit to be protected, and the electric current of acquisition is logical
Comparing unit is crossed compared with preset current threshold, if judgement knows that the electric current of the equalizing circuit is greater than preset current threshold
Value, then driving circuit control protective switch of the short circuit disconnects the connection of equalizing circuit and DC power supply；
There are three pin, second pins to be connected with the isolated DC source in equalizing circuit for protective switch of the short circuit, third pin
It is connected by sampling resistor with equalizer switch circuit, the first pin is connected with driving circuit.
Wherein, sampling unit, comparing unit and driving circuit and protective switch of the short circuit are designed using devices at full hardware, are not related to
And software section, avoid the problem of software failure causes short-circuit protection to fail.In addition, being opened by driving circuit short-circuit protection
The control for closing on-off, realizes the protection to equalizing circuit, i.e., when equalizing circuit short circuit, can cut off equalizing circuit immediately, rings
It is short between seasonable.
In the specific implementation, driving circuit here can be accomplished in several ways, below to one of embodiment party
Formula is specifically introduced, as shown in Fig. 2, being circuit diagram of the driving circuit of the present embodiment on circuit system, voltage-stabiliser tube
The anode of D3 is connected with the source electrode of metal-oxide-semiconductor field effect transistor U3, and the grid of cathode and metal-oxide-semiconductor field effect transistor U3 pass through the first dropping resistor R5
It is connected；The first shunt resistance R6 of voltage-stabiliser tube D3 parallel connection；The cathode of voltage-stabiliser tube is mutual by the first current-limiting resistance R1 and class B push-pull formula
The output end for mending power amplification circuit is connected；The input terminal of class B push-pull formula complementary symmetry power amplifier circuit is connected with supplying resistance R2
After connect to power supply；The source electrode of metal-oxide-semiconductor field effect transistor U3 is connected by sampling resistor R7 with equalizer switch U1；From sampling resistor R7 two
End output Is+ and Is- is into acquisition unit.
Supplying resistance R2 passes through pull down resistor R3 ground terminal.
The anode of light emitting diode D2 and the output end of class B push-pull formula complementary symmetry power amplifier circuit pass through the second decompression electricity
Hinder R4 connection；Minus earth end.
Class B push-pull formula complementary symmetry power amplifier circuit includes NPN type triode Q1 and PNP type triode Q2；The collector of Q1
Connect power supply；Output end after the emitter connection of the emitter and Q2 of Q1 as class B push-pull formula amplifying circuit；The base stage of Q1
Input terminal after being connect with the base stage of Q2 as class B push-pull formula amplifying circuit；The grounded collector end of Q2.
Diode D1 is in parallel with the first current-limiting resistance R1, and diode D1 anode is connected with the cathode of light emitting diode D2, and two
The cathode of pole pipe D1 is connected with the output end of class B push-pull formula complementary symmetry power amplifier circuit.
The drive circuit works principle is as follows:
Input drive signal is divided into low level signal and high level signal, when low level signal is complementary by class B push-pull formula
When the input terminal input of power amplification circuit, driving metal-oxide-semiconductor field effect transistor U3 cut-off carries out short-circuit protection to equalizing circuit, at this time
Light emitting diode D2 cut-off.
When high level signal input, amplified by class B push-pull formula complementary symmetry power amplifier circuit, using the first current limliting
After resistance R1 current limliting and the first dropping resistor R5 decompression, driving metal-oxide-semiconductor field effect transistor U3 conducting, equalizing circuit is worked normally, at this time
Light emitting diode D2 conducting, plays the role of instruction.
Diode D1, the second dropping resistor R4 and light emitting diode D2 form quick release metal-oxide-semiconductor junction capacity voltage circuit.
Voltage-stabiliser tube D3, the first shunt resistance R6 and the first current-limiting resistance R1 form voltage regulator circuit, protect metal-oxide-semiconductor field effect transistor
Conducting, prevents voltage excessive and punctures.
Load of the pull down resistor R3 as+15V, plays the role of pressure stabilizing, prevents from loading too small, voltage instability.
In the specific implementation, sampling unit here can be accomplished in several ways, below to one of embodiment party
Formula is specifically introduced, as shown in figure 3, being the sampling unit electrical block diagram of the present embodiment:
Resistance R8, R10, R11, R12 and integrated operational amplifier U4 composition seek poor amplifying circuit, and wherein the one end resistance R8 is
The first input end of poor amplifying circuit is sought, the other end is connect with the reverse input end of integrated operational amplifier U4；The one end resistance R12
Connect the reverse input end of integrated operational amplifier U4, the output end of another termination operational amplifier U4；The one end resistance R10 is to ask poor
Second input terminal of amplifying circuit, the noninverting input of another termination integrated operational amplifier U4；The integrated fortune of the termination of resistance R11 mono-
Calculate the noninverting input of amplifier U4, the reference voltage of another termination 2.048V.
Conditioning resistance R9 is connected between the first input end for seeking poor amplifying circuit and the second input terminal；Seek poor amplifying circuit
Second input terminal is grounded by the first filter capacitor C1.
Two diodes D4, D5 are connected between the non-inverting input terminal and inverting input terminal of integrated operational amplifier U4, are constituted
Double limiting diode.
The working principle of the sampling unit is as follows:
The current signal acquired from the both ends sampling resistor R7 is by improving the conditioning of resistance R9 and poor amplifying circuit being asked to amplify
Current sampling data is exported afterwards to euqalizing current comparison circuit；The resistance R11 mono- in poor amplifying circuit is asked to terminate integrated computation amplification
The noninverting input of device U4, another termination reference voltage, can be realized high-precision acquisition.
In the specific implementation, comparing unit here can be accomplished in several ways, below to one of embodiment party
Formula is specifically introduced, as shown in figure 4, the electrical block diagram of the comparing unit for the present embodiment, including euqalizing current threshold
It is worth circuit；DC balance resistance R15；Voltage comparator U5；Pull-up resistor R16；Second filter capacitor C1；Third dropping resistor
R17；4th dropping resistor R19；Second shunt resistance R18；Thyristor D7；Optical coupled switch U6.
Euqalizing current threshold circuit is composed in series by resistance R13 and resistance R14, and resistance one end after series connection connects power supply, and one
Terminate ground terminal.
Thyristor D7 has gate pole, anode and cathode.
There are four pins for optical coupled switch U6 tool；
Position between the inverting input terminal of voltage comparator U5 and resistance R13 and resistance R14 is connected, DC balance resistance
R15 is connect with the normal phase input end of voltage comparator U5；The one end pull-up resistor R16 connects to power supply, one end and voltage comparator
The output end of U5 connects；The output end of voltage comparator U5 is connect by third dropping resistor R17 with the gate pole of thyristor D7；The
Two filter capacitor C1 mono- terminate the gate pole of thyristor D7, other end ground terminal；Second one end shunt resistance R18 connects thyristor D7
Gate pole, other end ground terminal；The minus earth end of thyristor D7, anode pass through the 4th dropping resistor R19 and optical coupled switch U6
The second pin be connected.
The anode of light emitting diode D6 is connected by the 4th dropping resistor R19 with the second pin of optical coupled switch U6, is shone
The cathode of diode D6 is connect with the anode of thyristor D7.
The comparing unit working principle is as follows:
The current sampling data exported from sampling unit, is transferred to voltage comparator U5 by DC balance resistance R15, and pre-
If euqalizing current protection value compared by comparator U5, if current sampling data be greater than euqalizing current threshold value, U5 output
High level, driving thyristor D7 are connected, then power supply VCC, optical coupled switch U6, the 4th dropping resistor R19, light emitting diode D6, crystalline substance
The conducting of the circuit brake tube D7, GND, the third pin of optical coupled switch U6 and the short circuit of the 4th pin, output low level signal is to driving electricity
The input terminal of class B push-pull formula complementary symmetry power amplifier circuit in road, metal-oxide-semiconductor field effect transistor U3 are disconnected, and carry out short circuit to equalizing circuit
Protection；
If current sampling data is less than euqalizing current threshold value, optical coupled switch U6 exports high level signal into driving circuit
Class B push-pull formula complementary symmetry power amplifier circuit input terminal, metal-oxide-semiconductor field effect transistor U3 be attracted, equalizing circuit work normally.
By changing the size of the resistance value of R13 and R14, different current thresholds can be set.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. a kind of short-circuit protection circuit characterized by comprising sampling unit, comparing unit and short-circuit protection unit；
Wherein, the sampling unit for acquiring the electric current of equalizing circuit to be protected, and is exported to the comparing unit；
The comparing unit, for by the electric current of the equalizing circuit compared with preset current threshold, if judgement know it is described
The electric current of equalizing circuit is greater than preset current threshold, then controls the short-circuit protection unit and disconnect the equalizing circuit and direct current
The connection of power supply；
The short-circuit protection unit includes driving circuit and protective switch of the short circuit；
The protective switch of the short circuit includes N-channel enhancement mode MOSFET；
The driving circuit includes the first dropping resistor；First shunt resistance；First current-limiting resistance；Supplying resistance；Voltage-stabiliser tube；Second
Class push-pull type complementary symmetry power amplifier circuit；
The anode of the voltage-stabiliser tube is connected with the source electrode of the metal-oxide-semiconductor field effect transistor；The cathode of the voltage-stabiliser tube and described MOS effect
Should pipe grid by first dropping resistor be connected；The voltage-stabiliser tube the first shunt resistance in parallel；The yin of the voltage-stabiliser tube
Pole is connected by the first current-limiting resistance with the output end of the class B push-pull formula complementary symmetry power amplifier circuit；
The input terminal of the class B push-pull formula complementary symmetry power amplifier circuit is connected to power supply by the supplying resistance；
The input terminal of the input terminal connection fault control signal of the class B push-pull formula complementary symmetry power amplifier circuit；
The class B push-pull formula complementary symmetry power amplifier circuit includes a NPN triode and a PNP triode；The NPN tri-
Output end as the class B push-pull formula amplifying circuit after the emitter of pole pipe is connect with the emitter of the PNP triode；
The base stage of the NPN triode connect with the base stage of the PNP triode after as the defeated of the class B push-pull formula amplifying circuit
Enter end；The collector of the NPN triode connects power supply；The grounded collector end of the PNP triode；
The driving circuit further includes light emitting diode；The anode and class B push-pull formula complementary symmetry power amplifier of the light emitting diode
The output end of circuit is connected by the second dropping resistor；The minus earth end of the light emitting diode；
The driving circuit further includes diode, and the diode is in parallel with first current-limiting resistance, the sun of the diode
Pole is connected with the cathode of the light emitting diode, the cathode of the diode and the class B push-pull formula complementary symmetry power amplifier circuit
Output end be connected.
2. short-circuit protection circuit as described in claim 1, it is characterised in that: the supplying resistance is grounded by pull down resistor
End.
3. short-circuit protection circuit as described in claim 1, it is characterised in that: the sampling unit includes conditioning resistance；First
Filter capacitor；Seek poor amplifying circuit；Limiter diode group；
It is described that seek poor amplifying circuit include integrated operational amplifier；
The conditioning resistance is connected to described ask between the first input end of poor amplifying circuit and the second input terminal；It is described to ask poor amplification
Second input terminal of circuit is grounded by first filter capacitor；The limiter diode is connected to the integrated computation and puts
Between the non-inverting input terminal and inverting input terminal of big device, double limiting diode is constituted；
The current signal acquired from sampling unit exports sample rate current by the conditioning of conditioning resistance and after asking poor amplifying circuit to amplify
To comparing unit.
4. short-circuit protection circuit as claimed in claim 3, it is characterised in that: the integrated operational amplifier uses single supply mould
Formula.
5. short-circuit protection circuit as claimed in claim 4, it is characterised in that: comparing unit includes euqalizing current threshold circuit；
DC balance resistance；Voltage comparator；Pull-up resistor；Second filter capacitor；Third dropping resistor；4th dropping resistor；Second
Shunt resistance；Thyristor；Optical coupled switch；
The euqalizing current threshold circuit includes first resistor and second resistance, and one end of the first resistor connects power supply, separately
One end connects second resistance；The other end ground terminal of the second resistance；
There are four pins for the optical coupled switch tool；
Position between the inverting input terminal of the voltage comparator and the first resistor and the second resistance is connected；It is described
DC balance resistance is connect with the normal phase input end of the voltage comparator；Described pull-up resistor one end connects to power supply, one end
It is connect with the output end of the voltage comparator；The output end of the voltage comparator by the third dropping resistor with it is described
Gate circuit transistor gate connection；Second filter capacitor one terminates the gate circuit transistor gate, other end ground terminal；Described second shunts
Resistance one end connects the gate pole of thyristor, other end ground terminal；The minus earth end of the thyristor, anode pass through the described 4th
Dropping resistor is connected with the second pin of the optical coupled switch.
6. short-circuit protection circuit as claimed in claim 5, it is characterised in that: the comparing unit further include light emitting diode and
5th dropping resistor；The anode of the light emitting diode passes through the second pin of the 5th dropping resistor and the optical coupled switch
It is connected, the cathode of the light emitting diode and the anode of thyristor connect.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610502888.8A CN106160071B (en) | 2016-06-29 | 2016-06-29 | Short-circuit protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610502888.8A CN106160071B (en) | 2016-06-29 | 2016-06-29 | Short-circuit protection circuit |
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| CN106160071A CN106160071A (en) | 2016-11-23 |
| CN106160071B true CN106160071B (en) | 2019-05-07 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108828421A (en) * | 2018-04-09 | 2018-11-16 | 厦门科华恒盛股份有限公司 | A kind of thyristor malfunction detection system and method |
| CN111225478B (en) * | 2018-11-23 | 2022-06-07 | 明纬(广州)电子有限公司 | Switch module protection circuit |
| CN112491005B (en) * | 2020-11-05 | 2023-07-21 | 中国航空工业集团公司西安航空计算技术研究所 | Recoverable quick protection circuit of 28V/on output interface circuit |
| CN113359418A (en) * | 2021-06-18 | 2021-09-07 | 中国北方发动机研究所(天津) | Control circuit for improving PID overshoot and response time |
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| DE102011001633A1 (en) * | 2011-03-29 | 2012-10-04 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Charging device used for charging electrical energy storage device installed in e.g. electric vehicle, has coils that are arranged inside and outside motor vehicle, and are inductively coupled with each other |
| CN103099643A (en) * | 2013-03-01 | 2013-05-15 | 上海海事大学 | Muscle girth measuring device |
| CN205049679U (en) * | 2015-09-15 | 2016-02-24 | 广州智光自动化有限公司 | Residual current transformer sampling circuit |
| CN205811524U (en) * | 2016-06-29 | 2016-12-14 | 安徽锐能科技有限公司 | Short-circuit protection circuit |
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| CN106160071A (en) | 2016-11-23 |
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Denomination of invention: High power transistor fast short-circuit protective circuit Effective date of registration: 20191011 Granted publication date: 20190507 Pledgee: Hefei Xingtai financing guarantee Group Ltd. Pledgor: ANHUI RNTEC TECHNOLOGY Co.,Ltd. Registration number: Y2019340000112 |
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Denomination of invention: Short circuit protection circuit Effective date of registration: 20220506 Granted publication date: 20190507 Pledgee: China Construction Bank Corporation Hefei Shushan sub branch Pledgor: ANHUI RNTEC TECHNOLOGY Co.,Ltd. Registration number: Y2022980004761 |
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