CN103386934A - Power supply device and power supply method of vehicle-mounted electronic device - Google Patents
Power supply device and power supply method of vehicle-mounted electronic device Download PDFInfo
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- CN103386934A CN103386934A CN2012101450707A CN201210145070A CN103386934A CN 103386934 A CN103386934 A CN 103386934A CN 2012101450707 A CN2012101450707 A CN 2012101450707A CN 201210145070 A CN201210145070 A CN 201210145070A CN 103386934 A CN103386934 A CN 103386934A
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Abstract
The embodiment of the invention relates to a power supply device and a power supply method of a vehicle-mounted electronic device. The power supply method mainly comprises the steps of receiving the voltage output by a vehicle-mounted power supply through an electronic circuit, detecting the voltage, judging whether a voltage value obtained through the detection is lower than a set voltage over-low threshold value or higher than a set voltage over-high threshold value, and switching off the electronic circuit through an electronic switch if so; and outputting the voltage to the vehicle-mounted electronic device through the electronic circuit if not. According to the power supply device and the power supply method, which are disclosed by the embodiment of the invention, the situation of switching off a power supply of the vehicle-mounted electronic device in time when the voltage output by an automobile vehicle-mounted power supply is in the phenomena of under-voltage and over-voltage can be realized, the vehicle-mounted electronic device can be prevented from being damaged due to the damage of the power supply of the vehicle-mounted electronic device caused by over-high voltage output by the power supply of an automobile power supply and can be prevented from working unreliably due to over-low voltage output by the power supply of the vehicle-mounted electronic device caused by over-low voltage output by the automobile power supply, and the influence of various interferences such as crosstalk interference of the vehicle-mounted power supply on the vehicle-mounted electronic device can be effectively solved.
Description
Technical field
The present invention relates to the electrical application technology field, relate in particular to a kind of electric supply installation and method of vehicle electronic device.
Background technology
Automobile is the indispensable mobile transport vehicle of our modern society, various electronic machines are more and more on automobile, and automobile exists due to self, with external conditions, vehicle electronic device produced the various interference such as very strong space radiation interference, crosstalk interference.
Crosstalk interference is that the interfering signal that produces on automobile is transmitted on vehicle electronic device by various connection leads, makes the vehicle electronic device can not failure-free work.And interfering signal by power lead, mobile unit to be disturbed be one of main path, above-mentioned interfering signal the lighter make the data of vehicle electronic device inaccurate or lose, normal operation that can not be reliably, serious causes damage to vehicle electronic device.
The voltage stabilizing chip in automobile electrical source is very many now, but safety method is comprehensive not.Vehicle condition is poorer, and crosstalk interference is just stronger, often occurs because the voltage stabilizing chip safety method in automobile electrical source is inadequate, causes the vehicle electronic device power supply to damage, and due to the vehicle electronic device power supply, damages the damage that causes the vehicle electronic device whole system.Therefore, how to realize that it is a problem demanding prompt solution that vehicle electronic device is carried out the actv. power supply.
[summary of the invention]
Embodiments of the invention provide a kind of electric supply installation and method of vehicle electronic device, with realization, the power supply of vehicle electronic device are stablized, is effectively powered.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind of electric supply installation of vehicle electronic device comprises: vehicle power unit, voltage detecting protected location, electronic switch unit,
Described vehicle power unit, be used for to voltage detecting protected location and electronic switch unit output voltage;
Described voltage detecting protected location, being used for the voltage that output is come to described vehicle power unit detects, whether the magnitude of voltage that the judgement detection obtains is lower than the voltage below level threshold value of setting or higher than the overtension threshold value of setting, if so, send and turn-off control signal to described electronic switch unit; Otherwise, described electronic switch unit is not worked;
Described electronic switch unit, be used for being in conducting state when not receiving while turn-offing control signal, and the voltage transmission that the output of described vehicle power unit is come is to vehicle electronic device; Be in off state after receiving the shutoff control signal, the voltage transmission of output of described vehicle power unit not being come, to vehicle electronic device, is cut off the power supply to vehicle electronic device.
A kind of method of supplying power to of vehicle electronic device comprises:
Receive the voltage that vehicle power is exported by electronic circuit, voltage is detected, the magnitude of voltage that the judgement detection obtains, whether lower than the voltage below level threshold value of setting or higher than the overtension threshold value of setting, if so, turn-offs described electronic circuit by electronic switch; Otherwise, by described electronic circuit with described Voltage-output to vehicle electronic device.
can be found out by the technical scheme that the embodiment of the invention described above provides, the embodiment of the present invention is for the frequent problem fluctuated of the spread of voltage of automobile mounted power supply output, when appearring in the voltage that can realize the output of automobile mounted power supply, under-voltage and overvoltage phenomenon in time close the power supply of vehicle electronic device, prevent that vehicle electronic device is because the overtension of automobile power source output causes the power supply damage of vehicle electronic device to cause mobile unit to damage, the too low electric power output voltage that causes vehicle electronic device is too low causes the equipment can not reliable operation, can effectively solve the impact that the various interference such as vehicle power crosstalk interference produce vehicle electronic device.
[description of drawings]
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The concrete structure figure of the electric supply installation of a kind of vehicle electronic device that Fig. 1 provides for the embodiment of the present invention one;
The concrete structure figure of the electric supply installation of the another kind of vehicle electronic device that Fig. 2 provides for the embodiment of the present invention one;
The specific implementation circuit diagram of the electric supply installation of the vehicle electronic device a kind of shown in Figure 2 that Fig. 3 provides for the embodiment of the present invention two;
The concrete processing flow graph of the method for supplying power to of a kind of vehicle electronic device that Fig. 4 provides for the embodiment of the present invention three.
[specific embodiment]
For the purpose, technical scheme and the advantage that make the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment that obtains, belong to the scope of protection of the invention.
, for ease of the understanding to the embodiment of the present invention, be further explained explanation below in conjunction with accompanying drawing as an example of several specific embodiments example, and each embodiment does not form the restriction to the embodiment of the present invention.
Embodiment one
The embodiment of the present invention, for the automobile crosstalk interference, provides a kind of electric supply installation of vehicle electronic device, and its concrete structure as shown in Figure 1, comprising: vehicle power unit 11, voltage detecting protected location 12, electronic switch unit 13,
Described vehicle power unit 11, the electronic switch unit of being connected with the voltage detecting protected location connects.Be used for to voltage detecting protected location and electronic switch unit output voltage, this unit can be realized by vehicular power-bottle.
Described voltage detecting protected location 12, the electronic switch unit of being connected with the vehicle power unit connects.Being used for the voltage that output is come to described vehicle power unit detects, whether the magnitude of voltage that the judgement detection obtains is lower than the voltage below level threshold value of setting or higher than the overtension threshold value of setting, if so, send and turn-off control signal to described electronic switch unit; Otherwise, described electronic switch unit is not got effect.
Described electronic switch unit 13, be connected the vehicle power unit to connect with the voltage detecting protected location.Be used for being in conducting state when not receiving while turn-offing control signal, the voltage transmission that the output of described vehicle power unit is come is to vehicle electronic device; Be in off state after receiving the shutoff control signal, the voltage transmission of output of described vehicle power unit not being come, to vehicle electronic device, is cut off the power supply to vehicle electronic device.
Further; this embodiment provides the electric supply installation of another kind of vehicle electronic device; its concrete structure as shown in Figure 2, comprising: vehicle power unit 21, voltage detecting protected location 22, electronic switch unit 23, input filter and protected location 24, power supply voltage regulation unit 25, electronic machine turn-off control unit 26 and electronic machine powers on/power-off delay control unit 27.
Described vehicle power unit 21, be connected with protected location with input filter.Be used for to input filter and protected location output voltage, this unit can be vehicular power-bottle.
Input filter and protected location 24, this unit are optional, and the voltage detecting protected location of being connected with the vehicle power unit is connected with electronic switch unit.Be used for receiving the voltage of described vehicle power unit output, described voltage is carried out filtering and conservation treatment, will carry out Voltage-output after filtering and conservation treatment to described voltage detecting protected location and electronic switch unit.Described filtering and conservation treatment comprise: anti-reverse conservation treatment, AXT input absorb at least one in processing, common mode filtering disturbance rejection and differential mode filtering anti-interference process.Connect AXT input absorption diode--transient voltage twin zener dioder (V2) after specifically comprising anti-reverse protection diode, anti-reverse protection diode, connect common mode filtering and differential mode filtering antijamming circuit after AXT input absorption diode.Above-mentioned absorption diode can change pizo-resistance into.
Described voltage detecting protected location 22, be connected with protected location, electronic switch unit with input filter.Being used for the voltage that output is come to described vehicle power unit detects, whether the magnitude of voltage that the judgement detection obtains is lower than the voltage below level threshold value of setting or higher than the overtension threshold value of setting, if so, send and turn-off control signal to described electronic switch unit; Otherwise, described electronic switch unit is not got effect.
Described electronic switch unit 23, turn-off control unit, electronic machine with input filter and protected location, voltage detecting protected location, electronic machine to power on/the power-off delay control unit is connected with the power supply voltage regulation unit.Be used for being in conducting state when not receiving while turn-offing control signal, the voltage transmission that the output of described vehicle power unit is come is to vehicle electronic device; Be in off state after receiving the shutoff control signal, the voltage transmission of output of described vehicle power unit not being come, to vehicle electronic device, is cut off the power supply to vehicle electronic device.
Power supply voltage regulation unit 25, this unit are optional, and the electronic machine of being connected with electronic switch unit connects.Be used for receiving the voltage of described electronic switch unit output, described voltage carried out voltage stabilizing process, the voltage transmission after voltage stabilizing is processed is to vehicle electronic device.Can comprise: at least one item in switch voltage-stabilizing circuit, linear voltage-stabilizing circuit, integrated stable voltage circuit, DC/DC power supply.
Electronic machine turn-offs control unit 26, and this unit is optional, with electronic switch unit, is connected.Be used for sending to described electronic switch unit the shutoff control signal of electronic machine.
Electronic machine powers on/power-off delay control unit 27, and this unit is optional, with electronic switch unit, is connected.Be used for sending to described electronic switch unit power on inhibit signal or power-off delay signal;
Described electronic switch unit 23, after also being used for receiving described power-on delay signal, when described electronic machine started, the voltage transmission of after the time that delay is set, the output of described vehicle power unit being come was to electronic machine; After also being used for receiving described delay ct-off signal, when described electronic machine need to cut off the power supply, carry out the power operation of described electronic machine after the time that delay is set.
Described electronic machine powers on/and power-off delay control unit input end is connected on as automobile key door ACC(accessory; annex) shelves; described electronic machine powers on/and the power-off delay control unit comprises anti-reverse protection diode, π type filter circuit, power-on delay circuit and postpones power-down circuit; the value of adjusting resistance in described power-on delay circuit and/or electric capacity is controlled the power supply electrifying delay time of vehicle electronic device, adjusts the power cut-off delay time of the value control vehicle electronic device of resistance in described delay power-down circuit and/or electric capacity.Further, described voltage detecting protected location 22 can comprise: input voltage under-voltage protection unit 221 and/or input voltage Overvoltage protecting unit 222,
Described input voltage under-voltage protection unit; comprise: voltage detecting circuit 1 and transistor circuit 1; described transistor circuit 1 connects with the transistor circuit 3 of being connected in electronic switch unit; described voltage detecting circuit 1 receives the voltage of described vehicle power unit output, when described voltage detecting circuit 1 detects the input voltage V that obtains
inDuring greater than described voltage below level threshold value, described voltage detecting circuit 1 is to described transistor circuit 1 transmission current, and described transistor circuit 1 does not work to the transistor circuit 3 in described electronic switch unit; As described V
inWhile being less than or equal to described voltage below level threshold value, described voltage detecting circuit 1 is not to described transistor circuit 1 transmission current, and described transistor circuit 1 turn-offs and controls electric current to transistor circuit 3 transmission in described electronic switch unit;
Described input voltage Overvoltage protecting unit; comprise: voltage detecting circuit 2 and transistor circuit 2; described transistor circuit 2 connects with the transistor circuit 3 of being connected in electronic switch unit; described voltage detecting circuit 2 receives the voltage of described vehicle power unit output, detects the input voltage input V that obtains when described voltage detecting circuit 2
inGreater than described overtension threshold value constantly, described voltage detecting circuit 2 is to described transistor circuit 2 transmission currents, and described transistor circuit 2 turn-offs and controls electric current to transistor circuit 3 transmission in described electronic switch unit; As described input voltage V
inBe less than or equal to described overtension threshold value constantly, described voltage detecting circuit 2 is not to described transistor circuit 2 transmission currents, and described transistor circuit 2 does not work to the transistor circuit 3 in described electronic switch unit.
Further, described electronic switch unit 23, comprise transistor circuit 3 and switching valve circuit, the input end of described switching valve circuit receives the input voltage from described vehicle power unit, the input end that mouth connects described voltage stabilizing processing unit, be in off condition when the expansion in described transistor circuit 3 stream aerotron receives after described voltage detecting protected location or electronic machine turn-off the shutoff control signal that control unit transmits, the pipe that opens the light of controlling in described switching valve circuit by described expansion stream aerotron is in off condition; Do not turn-off shutoff that control unit transmits while controlling electric current when the expansion in described transistor circuit 3 stream aerotron receives described voltage detecting protected location or electronic machine, described expansion stream aerotron, switching valve are in conducting state.In actual applications, above-mentioned shutoff control signal can be controlled electric current for turn-offing.
Described switching valve is positive-negative-positive dual-polar triode or the P structure road V-type groove VMOS of metal-insulator semiconductor (MIS) pipe, according to mobile unit power size, the high-power dual-polar triode of described positive-negative-positive is single tube or Darlington transistor or many Darlington type aerotrons that single tube is combined into, and described P structure road VMOS pipe is single tube or how in parallel by all means.
Embodiment two
The specific implementation circuit diagram of the electric supply installation of the vehicle electronic device a kind of above-mentioned shown in Figure 2 that this embodiment provides as shown in Figure 3, comprising: vehicle power, power supply input filter and protective circuit, automobile ACC key door ON-OFF control circuit, under-voltage trigger circuit, electric voltage over press trigger circuit, electronic switching circuit, power supply stabilization circuit and consumer power cut-off control circuit.Below introduce respectively the function of each circuit:
As shown in Figure 3, the power input of vehicle electronic device directly is connected with automobile storage battery, the interfering signal that produces on automobile like this must just can enter on the mobile unit power supply to the storage battery end through connection lead, crosstalk signal absorbs through decay and the storage battery of connection lead, has reduced the crosstalk interference signal strength.
As shown in Figure 3, power input has anti-reverse protection diode, at the output voltage that calculates automobile storage battery, i.e. the input voltage V of power supply input filter and protective circuit
in, input voltage is under-voltage trigger value V
Inmin,, input voltage overvoltage trigger value V
InmaxThe time should deduct 0.7V.
The power circuit design parameters of the electric supply installation of above-mentioned vehicle electronic device shown in Figure 3 partly is calculated as follows:
The under-voltage trigger value of input voltage (voltage below level threshold value) V
Inmin: V
Inmin=V
Z4+ 0.7+I
Z4* R
3
The V4 Zener breakdown has electric current I
Z4:
Aerotron (V
5) base current I
b5:
Input voltage overvoltage trigger value (overtension threshold value) V
Inmax: V
Inmax=V
Z7+ 0.7+I
Z7* R
6
Aerotron (V8) base current I
b8:
The V7 available breakdown has electric current I
Z7:
V
10Base current I
b10:
V
Inmin, V
InmaxCan determine according to the minimum and maximum input voltage of electronic machine, can be according to punching voltage V
Z, and electric current I
Z, try to achieve resistance value R
3, R
6.
The input end of above-mentioned input voltage under-voltage protection circuit is connected with the mouth of protective circuit with the power supply input filter, adopts zener diode Zener breakdown mode of operation.As input voltage V
inHigher than the under-voltage trigger value V of input voltage
InminThe time, the voltage that the negative pole of zener diode V4 receives punctures operating voltage V higher than V4
Z4, the V4 Zener breakdown, have electric current
Flow through from V4, the base stage of aerotron (V5) has electric current
Flow into, select R
4Allow I
C5＜β I
b5, make V5 enter into saturated, the V5 current collection is low level very, makes aerotron V6 enter the cut-off mode of operation, does not affect the work of the expansion stream aerotron V10 in electronic switching circuit.As input voltage V
inReach or lower than under-voltage trigger value V
InminThe time, zener diode V4 cut-off, do not have electric current to flow through from V4, and the base tension of aerotron V5 is OV, and base current is 0, and aerotron V5 cut-off, make the base stage of aerotron V6 that electric current be arranged
Flow into, make aerotron V6 enter saturated, V
C6=V
b10=0.3V is low level, makes the expansion stream aerotron V10 cut-off in electronic switching circuit, and electronic switching circuit turn-offs.
Described input voltage overvoltage crowbar adopts zener diode available breakdown mode of operation.As input voltage V
inLower than input voltage overvoltage trigger value V
InmaxThe time, the V7 cut-off does not have electric current; The base tension of aerotron V8 is OV, and base current is 0, and aerotron V8 is operated in off condition, does not affect the expansion stream aerotron V10 work in electronic switching circuit.As input voltage V
inReach or higher than input voltage overvoltage trigger value V
InmaxThe time, voltage punctures operating voltage V higher than zener diode V7's
Z7The time, the V7 available breakdown has electric current I
Z7=
By, the base stage of aerotron V8 has electric current
Flow into, make V8 enter saturated, V
C8=V
b10=0.3V is low level, makes the expansion stream aerotron V10 cut-off in electronic switching circuit, and electronic switching circuit turn-offs.
Electronic switching circuit is subjected to automobile ACC key door ON-OFF control circuit, input voltage under-voltage protection circuit, input voltage overvoltage crowbar and consumer power cut-off control circuit co-controlling, and one of them circuit is controlled just can turn-off control to electronic switching circuit.Electronic switching circuit forms by expanding stream aerotron V10 and switching valve V9.Switching valve V9 can be the high-power dual-polar triode of positive-negative-positive, and also P structure road VMOS manages.According to mobile unit power size, the high-power dual-polar triode of above-mentioned PN P type can adopt single tube or Darlington transistor or many Darlington type modes that single tube is combined into; How by all means above-mentioned P structure road VMOS pipe can adopt single tube or parallel way.
V in working order
10Base current I
b10:
Calculate the minimum load current I of electronic switching circuit according to the work efficiency of mobile unit power size and power supply stabilization circuit
c9.
When switching valve V9 adopts the high-power dual-polar triode of positive-negative-positive, ≈, value is selected β value, the β value be that aerotron manufacturer provides and when designing specified parameter, meet β I
b9＞I
c9, β I
b10＞I
c10, I
b9≈ I
c10Condition, meet the high-power dual-polar triode pipe of PN P type and be operated in saturated.When input voltage is in normal range, expand stream aerotron V10 collector and controlled by ACC key door circuit and device power supply (DPS) cut-off signals, be operated in saturated, collecting electrode has electric current:
Expand stream aerotron V10 collector current
The switching valve base current
The switching valve collector current meets I
C9≤ β
Ib9, be operated in saturated.
When input voltage is too low or when too high, transistor circuit 1 or 2 V6 or V8 saturation conduction, V
C6Or V
C8Collector voltage be 0.3V, make that to expand stream aerotron V10 collector volatge be 0.3V, enter the cut-off mode of operation; Expanding stream aerotron V10 collected current and switching valve V9 base current is 0V, switching valve cut-off, the power supply of shutoff electronic machine.
When switching valve V9 adopts P structure road VMOS pipe, select R
8, R
9, calculate the grid source electrode
Wherein, cut-in voltage＜V
GS＜the punching voltage.Get during cut-in voltage: V
in=V
InminGet V during the punching voltage
in=V
InmaxMeet simultaneously β I
b10＞I
c10Condition, meet P structure road VMOS pipe and be operated in the conducting mode of operation
When input voltage is in normal range, expand stream aerotron V10 collector and controlled by ACC key door circuit and device power supply (DPS) cut-off signals, be operated in saturated, collecting electrode has electric current:
Expand stream aerotron V10 collector current
The switching valve gate-source voltage
Switching valve gate-source voltage V
GSMeet cut-in voltage＜V
GS＜the punching voltage, be operated in the conducting mode of operation.
When input voltage is too low or when too high, transistor circuit 1 or 2 V6 or V8 saturation conduction, V
C6Or V
C8Collector voltage be 0.3V, make that to expand stream aerotron V10 collector volatge be 0.3V, enter the cut-off mode of operation; Expanding stream aerotron V10 collected current is OV, switching valve V9 gate-source voltage V
GSFor OV, switching valve cut-off, the power supply of shutoff electronic machine.
The input end of described power supply input filter protective circuit is connected with storage battery on automobile with edge connector by connection lead; particular circuit configurations as shown in Figure 3; power supply input filter protective circuit comprises anti-reverse protection diode (V1), AXT input absorption diode--transient voltage twin zener dioder (V2), common mode filtering and differential mode filtering antijamming circuit, the said external input absorption diode of crosstalking can be pizo-resistance.
The input end of described automobile ACC key door ON-OFF control circuit is connected by the connection lead at ACC key door switch controlling point on connection lead and edge connector and automobile or switch controlling point; particular circuit configurations as shown in Figure 3, comprising anti-reverse protection diode, π type filter circuit, power-on delay circuit with postpone power-down circuit.Adjust the power supply electrifying delay time that R1, C9 control vehicle electronic device; Adjust the power remove electric delay time that R2, C9 control vehicle electronic device.
Described power supply stabilization circuit can be switch voltage-stabilizing circuit or linear voltage-stabilizing circuit or integrated stable voltage circuit circuit or DC/DC power supply.
Described consumer power cut-off control circuit is that its interface is Transistor-Transistor Logic level or COMS level, can be also the forward logic level of level higher than 1V by the control interface of vehicle electronic device output.
Embodiment three
This embodiment provides a kind of method of supplying power to of vehicle electronic device, and its concrete treatment scheme as shown in Figure 4, comprises following treatment step:
The voltage that step 41, reception vehicle power are exported by electronic circuit, detect voltage.
The magnitude of voltage that step 42, judgement detection obtain, whether lower than the voltage below level threshold value of setting or higher than the overtension threshold value of setting, if so, performs step 43; Otherwise, execution step 44.
In actual applications, can first to the voltage that transmits on described electronic circuit, carry out voltage stabilizing and process, the voltage transmission after voltage stabilizing is processed is to vehicle electronic device.
Further, described voltage on described electronic circuit is also comprised before detecting:
By input filter and protective circuit, the voltage on described electronic circuit is carried out filtering and conservation treatment, described filtering and conservation treatment comprise: anti-reverse conservation treatment, AXT input absorb at least one in processing, common mode filtering disturbance rejection and differential mode filtering anti-interference process.Described input filter and protective circuit can comprise anti-reverse protection diode, AXT input absorption diode or pizo-resistance, and common mode filtering and differential mode filtering antijamming circuit.
Further, described method also comprises:
After receiving the shutoff control signal of vehicle electronic device, by electronic switch, turn-off described electronic circuit;
Perhaps
After receiving the power-on delay signal of described vehicle electronic device, when described vehicle electronic device starts, give described vehicle electronic device with the voltage transmission on described electronic circuit after the time that delay is set;
Perhaps,
After receiving the delay ct-off signal of described vehicle electronic device, when described vehicle electronic device need to cut off the power supply, carry out the power operation of described electronic machine after the time that delay is set.
Above-mentioned electronic delays power on/the cut off the power supply input end of control signal can be connected on automobile key door ACC shelves; described electronic machine powers on/and the power-off delay control unit can comprise anti-reverse protection diode, π type filter circuit, power-up time delay circuit and power-off delay circuit; the value of adjusting resistance in described power-up time delay circuit and/or electric capacity is controlled the power supply electrifying delay time of vehicle electronic device, adjusts the power cut-off delay time of the value control vehicle electronic device of resistance in described power-off delay circuit and/or electric capacity.
Concrete; whether described judgement detects the magnitude of voltage that obtains and can complete by input voltage under-voltage protection circuit lower than the voltage below level threshold value of setting; this input voltage under-voltage protection circuit can comprise: voltage detecting circuit 1 and transistor circuit 1; described transistor circuit 1 connects with the transistor circuit 3 of being connected in electronic switch unit; described voltage detecting circuit 1 receives the voltage of described vehicle power unit output, when described voltage detecting circuit 1 detects the input voltage V that obtains
inDuring greater than described voltage below level threshold value, described voltage detecting circuit 1 is to described transistor circuit 1 transmission current, and described transistor circuit 1 does not work to the transistor circuit 3 in described electronic switch unit; As described V
inWhile being less than or equal to described voltage below level threshold value, described voltage detecting circuit 1 is not to described transistor circuit 1 transmission current, and described transistor circuit 1 turn-offs and controls electric current to transistor circuit 3 transmission in described electronic switch unit;
Concrete; whether described judgement detects the magnitude of voltage that obtains and can complete by the input voltage overvoltage crowbar higher than the overtension threshold value of setting; this input voltage overvoltage crowbar can comprise: voltage detecting circuit 2 and transistor circuit 2; described transistor circuit 2 connects with the transistor circuit 3 of being connected in electronic switch unit; described voltage detecting circuit 2 receives the voltage of described vehicle power unit output, detects the input voltage input V that obtains when described voltage detecting circuit 2
inDuring greater than described overtension threshold value, described voltage detecting circuit 2 is to described transistor circuit 2 transmission currents, and described transistor circuit 2 turn-offs and controls electric current to transistor circuit 3 transmission in described electronic switch unit; As described input voltage V
inWhile being less than or equal to described overtension threshold value, described voltage detecting circuit 2 is not to described transistor circuit 2 transmission currents, and described transistor circuit 2 does not work to the transistor circuit 3 in described electronic switch unit.
Concrete, the circuit of described electronic switch can comprise transistor circuit 3 and switching valve circuit, the input end of described switching valve circuit receives the input voltage from described vehicle power unit, the input end that mouth connects described voltage stabilizing processing unit, turn-off after electric current is controlled in shutoff that control unit transmits and be in off condition when the expansion in described transistor circuit 3 stream aerotron receives described voltage detecting protected location or electronic machine, the pipe that opens the light of controlling in described switching valve circuit by described expansion stream aerotron is in off condition; Do not turn-off shutoff that control unit transmits while controlling electric current when the expansion in described transistor circuit 3 stream aerotron receives described voltage detecting protected location or electronic machine, described expansion stream aerotron, the pipe that opens the light are in conducting state.
The specific implementation of the circuit of above-mentioned input filter and protective circuit, input voltage under-voltage protection circuit, input voltage overvoltage crowbar, electronic switch can be with reference to above-mentioned Fig. 3, and concrete treating process can be with reference to above-described embodiment one and embodiment two.
In addition, term " system " and " network " often are used interchangeably in this article herein.Herein term " and/or ", be only a kind of incidence relation of describing affiliated partner, can there be three kinds of relations in expression, for example, A and/or B can represent: individualism A exists A and B, these three kinds of situations of individualism B simultaneously.In addition, character "/", represent that generally forward-backward correlation is to liking a kind of relation of "or" herein.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, to come the relevant hardware of instruction to complete by computer program, described program can be stored in a computer read/write memory medium, this program when carrying out, can comprise the flow process as 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.
In sum, the embodiment of the present invention is for the unstable often problem fluctuated of automotive voltage, can realize when under-voltage and overvoltage phenomenon appear in automotive voltage in time closing the power supply of vehicle electronic device, prevent that vehicle electronic device from damaging because the overtension of automobile power source output causes mobile unit, the too low equipment that causes can not reliable operation, can effectively overcome the impact that the various interference such as space radiation interference, crosstalk interference produce vehicle electronic device.
The embodiment of the present invention not only has anti-reverse protection diode, AXT input absorbing circuit, filtering antijamming circuit multiple protection measure at input end; Also realized opening automobile ACC key door delayed startup mobile unit power supply, being beneficial to automobile storage battery has sufficient time and energetic start up automobile when igniting; The power supply of automobile ACC key door time delayed turn-off vehicle electronic device, make vehicle electronic device when automobile flameout to work on when automobile flameout.Consumer power remove control signal end has the off signal of forbidding, the mobile unit power supply can not be cut off the power supply at once, and only consumer power remove control signal end has off signal after mobile unit work is all completed, and the mobile unit power supply could cut off the power supply.
The embodiment of the present invention is for the automobile actual state, extraordinaryly solved mobile unit reliability application on automobile, and components and parts are all application universal elements very widely on market, and buying is convenient, and cost is low, the very wide model of application.
The above; only for the better specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (13)
1. the electric supply installation of a vehicle electronic device, is characterized in that, comprising: vehicle power unit, voltage detecting protected location, electronic switch unit,
Described vehicle power unit, be used for to voltage detecting protected location and electronic switch unit output voltage;
Described voltage detecting protected location, being used for the voltage that output is come to described vehicle power unit detects, whether the magnitude of voltage that the judgement detection obtains is lower than the voltage below level threshold value of setting or higher than the overtension threshold value of setting, if so, send and turn-off control signal to described electronic switch unit; Otherwise, described electronic switch unit is not worked;
Described electronic switch unit, be used for being in conducting state when not receiving while turn-offing control signal, and the voltage transmission that the output of described vehicle power unit is come is to vehicle electronic device; Be in off state after receiving the shutoff control signal, the voltage transmission of output of described vehicle power unit not being come, to vehicle electronic device, is cut off the power supply to vehicle electronic device.
2. device according to claim 1, is characterized in that, described device also comprises:
Input filter and protected location; be used for receiving the voltage of described vehicle power unit output; described voltage is carried out filtering and conservation treatment; give described voltage detecting protected location with the Voltage-output after filtering and conservation treatment, described filtering and conservation treatment comprise: anti-reverse conservation treatment, AXT input absorb at least one in processing, common mode filtering anti-interference process and differential mode filtering anti-interference process.
3. device according to claim 2 is characterized in that:
Described input filter and protected location comprise anti-reverse protection diode, AXT input absorption diode or pizo-resistance and common mode filtering and differential mode filtering antijamming circuit.
4. device according to claim 1, is characterized in that, described device also comprises:
The power supply voltage regulation unit, be used for receiving the voltage that described electronic switch unit is exported, and described voltage carried out voltage stabilizing process, and the voltage transmission after voltage stabilizing is processed is to vehicle electronic device.
5. device according to claim 4, is characterized in that, described device also comprises:
Electronic machine turn-offs control unit, is used for sending to described electronic switch unit the shutoff control signal of vehicle electronic device.
6. the described device of according to claim 1 to 5 any one, is characterized in that, described device also comprises:
Electronic machine powers on/the power-off delay control unit, is used for to described electronic switch unit transmission lag power on signal or postpones ct-off signal;
Described electronic switch unit, after also being used for receiving described power-on delay signal, when described electronic machine started, the voltage transmission of after the time that delay is set, the output of described vehicle power unit being come was to electronic machine; After also being used for receiving described delay ct-off signal, when described electronic machine need to cut off the power supply, carry out the power operation of described electronic machine after the time that delay is set.
7. device according to claim 6 is characterized in that:
Described electronic machine powers on/and power-off delay control unit input end is connected on automobile key door ACC shelves; described electronic machine powers on/and the power-off delay control unit comprises anti-reverse protection diode, π type filter circuit, delay circuit and power-off delay circuit power on; the value of adjusting resistance in the described delay circuit that powers on and/or electric capacity is controlled the power supply electrifying delay time of vehicle electronic device, adjusts the power cut-off delay time of the value control vehicle electronic device of resistance in described power-off delay circuit and/or electric capacity.
8. device according to claim 1, is characterized in that, described voltage detecting protected location comprises: input voltage under-voltage protection unit and/or input voltage Overvoltage protecting unit,
Described input voltage under-voltage protection unit; comprise: voltage detecting circuit 1 and transistor circuit 1; described transistor circuit 1 connects with the transistor circuit 3 of being connected in electronic switch unit; described voltage detecting circuit 1 receives the voltage of described vehicle power unit output, when described voltage detecting circuit 1 detects the input voltage V that obtains
inDuring greater than described voltage below level threshold value, described voltage detecting circuit 1 is to described transistor circuit 1 transmission current, and described transistor circuit 1 does not work to the transistor circuit 3 in described electronic switch unit; As described input voltage V
inWhile being less than or equal to described voltage below level threshold value, described voltage detecting circuit 1 is not to described transistor circuit 1 transmission current, and described transistor circuit 1 turn-offs control signal to transistor circuit 3 transmission in described electronic switch unit;
Described input voltage Overvoltage protecting unit; comprise: voltage detecting circuit 2 and transistor circuit 2; described transistor circuit 2 connects with the transistor circuit 3 of being connected in electronic switch unit; described voltage detecting circuit 2 receives the voltage of described vehicle power unit output, when described voltage detecting circuit 2 detects the input voltage V that obtains
inDuring greater than described overtension threshold value, described voltage detecting circuit 2 is to described transistor circuit 2 transmission currents, and described transistor circuit 2 turn-offs control signal to transistor circuit 3 transmission in described electronic switch unit; As described input voltage V
inWhile being less than or equal to when described the overtension threshold value, described voltage detecting circuit 2 is not to described transistor circuit 2 transmission currents, and described transistor circuit 2 does not work to the transistor circuit 3 in described electronic switch unit.
9. device according to claim 5 is characterized in that:
Described electronic switch unit, comprise transistor circuit 3 and power switch circuit, the input end of described power switch circuit receives the input voltage from described vehicle power unit, the input end that mouth connects described voltage stabilizing processing unit, be in off condition when the expansion in described transistor circuit 3 stream aerotron receives after described voltage detecting protected location or electronic machine turn-off the shutoff control signal that control unit transmits, the switching valve of controlling in described power switch circuit by described expansion stream aerotron is in off condition; When the expansion in described transistor circuit 3 stream aerotron did not receive described voltage detecting protected location or electronic machine and turn-offs the shutoff control signal that control unit transmits, described expansion stream aerotron, switching valve were in the saturation conduction state.
10. the method for supplying power to of a vehicle electronic device, is characterized in that, comprising:
Receive the voltage that vehicle power is exported by electronic circuit, voltage is detected, the magnitude of voltage that the judgement detection obtains, whether lower than the voltage below level threshold value of setting or higher than the overtension threshold value of setting, if so, turn-offs described electronic circuit by electronic switch; Otherwise, by described electronic circuit with described Voltage-output to vehicle electronic device.
11. method according to claim 10, is characterized in that, described voltage on described electronic circuit also comprised before detecting:
Voltage on described electronic circuit is carried out filtering and conservation treatment, and described filtering and conservation treatment comprise: anti-reverse conservation treatment, AXT input absorb at least one in processing, common mode filtering disturbance rejection and differential mode filtering anti-interference process.
12. method according to claim 10, is characterized in that, describedly by described electronic circuit, described Voltage-output comprised to vehicle electronic device:
The voltage that transmits on described electronic circuit is carried out voltage stabilizing process, the voltage transmission after voltage stabilizing is processed is to vehicle electronic device.
13., according to claim 10 to the 12 described methods of any one, it is characterized in that, described method also comprises:
After receiving the shutoff control signal of vehicle electronic device, by electronic switch, turn-off described electronic circuit;
Perhaps
After receiving the power-on delay signal of described vehicle electronic device, give described vehicle electronic device with the voltage transmission on described electronic circuit after postponing the time of setting;
Perhaps,
After receiving the delay ct-off signal of described vehicle electronic device, carry out the power operation of described electronic machine after postponing the time of setting.
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| CN108058662A (en) * | 2018-01-02 | 2018-05-22 | 中国第汽车股份有限公司 | Vehicle-mounted 24V systems throw load transient overvoltage protects circuit |
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| CN109861176A (en) * | 2018-12-20 | 2019-06-07 | 上海华兴数字科技有限公司 | Electric power management circuit and system |
| CN110254379A (en) * | 2019-07-09 | 2019-09-20 | 四川朗勃科技有限公司 | Automobile multimedia device, which does not power off, does not restart circuit main board |
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| CN113746059A (en) * | 2020-05-29 | 2021-12-03 | 比亚迪股份有限公司 | Vehicle power supply circuit, system and vehicle |
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| CN111707341A (en) * | 2020-06-24 | 2020-09-25 | 北京恒通安泰科技有限公司 | Data acquisition device and data acquisition method for rail weighbridge and rail weighbridge |
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