CN207523615U - Vehicle power supply power supply circuit and vehicle communication terminal - Google Patents
Vehicle power supply power supply circuit and vehicle communication terminal Download PDFInfo
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- CN207523615U CN207523615U CN201721708430.4U CN201721708430U CN207523615U CN 207523615 U CN207523615 U CN 207523615U CN 201721708430 U CN201721708430 U CN 201721708430U CN 207523615 U CN207523615 U CN 207523615U
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Abstract
The utility model discloses a kind of vehicle power supply power supply circuit, which includes power input, power output end, power switching module, switch control module and power supply self-locking module.Power input accesses the supply voltage that automobile batteries or engine provide, and whether supply voltage exports electricity consumption load supplying to power output end to vehicle communication terminal to switch control module control power switching module；Self-locking module of powering exports latch signal to switch control module after vehicle communication terminal normal work, to control power switching module that output supply voltage is connected, and lock power supply power supply state, and stop output latch signal, the output for voltage of cutting off the power when automobile flameout duration reaches preset time.The invention also discloses a kind of vehicle communication terminal, which is included with electric loading and above-mentioned vehicle power supply power supply circuit.The utility model can avoid energy waste, protect automobile batteries, it is ensured that automobile can normally start again after long-time is flame-out.
Description
Technical field
The utility model is related to vehicle-mounted product technical field more particularly to a kind of vehicle power supply power supply circuits and vehicle-carrying communication
Terminal.
Background technology
Defeated power supply outside automobile, generally have normalizing, ignition switch signal (ACC), (GND) three line, wherein normalizing is in 12V
Its output voltage range is 9~16V during power-supply system, and in 24V power-supply systems, its output is 18~32V, in general, vehicle-mounted product
Normal in normalizing after being installed on automobile, vehicle-mounted product is all the Push And Release with automobile ignition switch and reality
Now booting and shut-off function.
Since automobile is more demanding to power consumption of the vehicle-mounted product after vehicle stall, especially new-energy automobile is in itself
Battery powered, it is desirable that can higher.In general, vehicle-mounted product dark current control within 3mA, be it is standard compliant, still
In the case where automobile does not use throughout the year, the dark current of multiple vehicle-mounted products is added together or can be complete by the power consumption of battery, electricity
Pond, which has been consumed to directly result in when automobile is lighted a fire again, to misfire and can not start.
When automobile normal power supply, the normal power consumption of vehicle communication terminal, after automobile is in flameout state, vehicle-carrying communication is whole
End may also need to start by set date work, such as send the data informations such as position data to monitor supervision platform, at this moment still require
Timing wake-up electric energy normal power supply often.However, in the case where automobile is flame-out for a long time, vehicle communication terminal start by set date work
Work can largely consume automobile battery power, cause energy waste, be also susceptible to battery and exhaust or damage, automobile can not open again
The problems such as dynamic.
Utility model content
The main purpose of the utility model is that provide a kind of vehicle power supply power supply circuit and vehicle communication terminal, it is intended to keep away
Exempt from energy waste, protect automobile batteries, it is ensured that automobile can normally start again after long-time is flame-out.
In order to achieve the above object, the utility model provides a kind of vehicle power supply power supply circuit, vehicle power supply power supply electricity
Road includes power input, power output end, power switching module, switch control module and power supply self-locking module；
For the power input for being connected to automobile batteries or engine, the power output end is vehicle-mounted for being connected to
Communication terminal uses electric loading；The input terminal of the power switching module is connect with the power input, the power switch
The output terminal of module is connect with the power output end；The power supply self-locking module and the input terminal of the switch control module connect
It connects, the output terminal of the switch control module is connect with the control terminal of the power switching module；
The supply voltage that the power input access automobile batteries or engine provide, the power switching module control
Whether the supply voltage, which is exported to the power output end, is given electricity consumption load supplying, and the switch control module controls the electricity
The break-make of source switch module；Power supply self-locking module output latch signal after vehicle communication terminal normal work is opened to described
Control module is closed, the power switching module conducting to be controlled to export the supply voltage, and lock power supply power supply state, and
When automobile flameout duration reaches preset time, stop output latch signal to the switch control module, to cut off the power supply
The output of voltage.
Preferably, the power supply self-locking module includes microcontroller, 3rd resistor and the first diode；
The anode of first diode connects via the latch signal output terminal of the 3rd resistor and the microcontroller
It connects, the cathode of first diode is connect with the input terminal of the switch control module.
Preferably, the switch control module includes triode and second resistance；
The base stage of the triode is connect with the output terminal of the power supply self-locking module, the collector of the triode via
The second resistance is connect with the control terminal of the power switching module, the emitter ground connection of the triode.
Preferably, the power supply self-locking module includes microcontroller, 3rd resistor and the first diode；
The anode of first diode connects via the latch signal output terminal of the 3rd resistor and the microcontroller
It connects, the cathode of first diode is connect with the input terminal of the switch control module.
Preferably, the vehicle power supply power supply circuit further includes igniting wake-up module and charging wake-up module；
The output terminal of the igniting wake-up module and the output terminal of the charging wake-up module control mould with the switch
The input terminal connection of block, the igniting wake-up module, the charging wake-up module are respectively in automotive ignition, automobile batteries charging
Output power supply enabling signal is to the switch control module, the power switching module conducting to be controlled to export the power supply electricity
Pressure.
Preferably, the igniting wake-up module includes igniting wake-up voltage input terminal and the second diode；
The igniting wake-up voltage input terminal is used to be connected to automobile ignition switch, the anode of second diode and institute
The input terminal connection of igniting wake-up voltage is stated, the cathode of second diode is connect with the input terminal of the switch control module.
Preferably, the igniting wake-up module further includes the 4th resistance and the 5th resistance；
One end of 4th resistance is connect with the igniting wake-up voltage input terminal, the other end warp of the 4th resistance
By the 5th resistance eutral grounding, the public connecting end of the 4th resistance and the 5th resistance and the sun of second diode
Pole connects.
Preferably, the charging wake-up module includes charging wake-up voltage input terminal and third diode；
The charging wake-up voltage input terminal enables switch, the anode of the third diode for being connected to automobile charging
It is connect with the charging wake-up voltage input terminal, the cathode of the third diode connects with the input terminal of the switch control module
It connects.
Preferably, the charging wake-up module further includes the 6th resistance and the 7th resistance；
One end of 6th resistance is connect with the igniting wake-up voltage input terminal, the other end warp of the 6th resistance
By the 7th resistance eutral grounding, the public connecting end of the 6th resistance and the 7th resistance and the sun of the third diode
Pole connects.
The utility model also provides a kind of vehicle communication terminal, which is included with electric loading and vehicle power supply
Power supply circuit, the vehicle power supply power supply circuit are connect with described with electric loading, for the electricity consumption load supplying or cut-out
To the power supply with electric loading.The vehicle power supply power supply circuit includes power input, power output end, power switch mould
Block, switch control module and power supply self-locking module；
For the power input for being connected to automobile batteries or engine, the power output end is vehicle-mounted for being connected to
Communication terminal uses electric loading；The input terminal of the power switching module is connect with the power input, the power switch
The output terminal of module is connect with the power output end；The power supply self-locking module and the input terminal of the switch control module connect
It connects, the output terminal of the switch control module is connect with the control terminal of the power switching module；
The supply voltage that the power input access automobile batteries or engine provide, the power switching module control
Whether the supply voltage, which is exported to the power output end, is given electricity consumption load supplying, and the switch control module controls the electricity
The break-make of source switch module；Power supply self-locking module output latch signal after vehicle communication terminal normal work is opened to described
Control module is closed, the power switching module conducting to be controlled to export the supply voltage, and lock power supply power supply state, and
When automobile flameout duration reaches preset time, stop output latch signal to the switch control module, to cut off the power supply
The output of voltage.
Vehicle power supply power supply circuit provided by the utility model, by self-locking module of powering in the flame-out situation of long-time
Under, control switch control module shutdown so that power switching module turns off so that automobile batteries stops electric discharge, confession of cutting off the power
Electricity condition.So as to avoid energy waste, automobile batteries is protected, it is ensured that automobile subnormal again can open after long-time is flame-out
It is dynamic, it solves traditional vehicle communication terminal and still consumes automobile battery power in the case where automobile is flame-out for a long time, cause the energy
The problems such as waste, is also easy to cause battery and exhausts or damage, and automobile can not be again started up.
Description of the drawings
Fig. 1 is the theory structure schematic diagram of one embodiment of the utility model vehicle power supply power supply circuit；
Fig. 2 is the theory structure schematic diagram of another embodiment of the utility model vehicle power supply power supply circuit；
Fig. 3 is the electrical block diagram of one embodiment of the utility model vehicle power supply power supply circuit.
The realization of the purpose of this utility model, functional characteristics and advantage will in conjunction with the embodiments, and be made further with reference to attached drawing
Explanation.
Specific embodiment
It should be appreciated that specific embodiment described herein is only used to explain the utility model, it is not used to limit this
Utility model.
The utility model provides a kind of vehicle power supply power supply circuit.
With reference to Fig. 1, Fig. 1 is the theory structure schematic diagram of one embodiment of the utility model vehicle power supply power supply circuit.
In one embodiment of the utility model, as shown in Figure 1, the utility model vehicle power supply power supply circuit includes power input
Hold VIN, power output end VOUT, power switching module 10, switch control module 20 and power supply self-locking module 30.
For being connected to automobile batteries or engine, the power output end VOUT is used to connect the power input VIN
Be connected to vehicle communication terminal uses electric loading；The input terminal of the power switching module 10 is connect with the power input VIN,
The output terminal of the power switching module 10 is connect with the power output end VOUT；The power supply self-locking module 30 is opened with described
Close the input terminal connection of control module 20, the control of the output terminal of the switch control module 20 and the power switching module 10
End connection.
The supply voltage that the power input VIN access automobile batteries or engine provide, the power switching module
Whether the 10 control supply voltages, which are exported to the power output end VOUT, is given electricity consumption load supplying, the switch control module
The break-make of the 20 control power switching modules 10；The power supply self-locking module 30 exports after vehicle communication terminal normal work
Latch signal is to the switch control module 20, the conducting of power switching module 10 to be controlled to export the supply voltage, and
Power supply power supply state is locked, and when automobile flameout duration reaches preset time, stop output latch signal to the switch control
Molding block 20, to cut off the output of the supply voltage.
In the present embodiment, after the vehicle communication terminal normal work on automobile, power supply self-locking module 30 exports
Latch signal is to switch control module 20 so that switch control module 20 is connected, and then power switching module 10 is controlled to be connected.
After automotive ignition in the case of automobile engine normal operation, automobile engine power generation, automobile engine generates
Supply voltage export to power input VIN；If alternatively, automobile be pure electric automobile, after automotive ignition, automobile batteries
Electric discharge, the supply voltage of automobile batteries output are exported to power input VIN.It is electric at this time since power switching module 10 is connected
The supply voltage of source input terminal VIN accesses is exported by power switching module 10 to power output end VOUT, so as to pass through power supply
Output terminal VOUT exports the supply voltage to the electricity consumption load supplying of vehicle communication terminal.
In the case that vehicle communication terminal can need start by set date work after automobile flameout, i.e., after automobile flameout, vehicle
In the case that load communication terminal is standby, automobile batteries electric discharge, the supply voltage of automobile batteries output is exported to power input
VIN, the supply voltage are exported by power switching module 10 to power output end VOUT, by power output end VOUT by the electricity
Source voltage output is to the electricity consumption load supplying of vehicle communication terminal.
After vehicle communication terminal normal work, i.e., in the case where vehicle communication terminal works normally or is standby, power supply is certainly
The latch signal that lock module 30 exports is connected, and then control power switch as power supply enabling signal control switch control module 20
The output of 10 constant conduction supply voltage of module so that vehicle power supply power supply circuit is locked in power supply power supply state, power supply power supply
State is no longer influenced by other power supply enabling signals.
In the case where automobile flameout duration reaches preset time (such as 3 months), power supply self-locking module 30 stops output certainly
Lock signal is to switch control module 20 so that switch control module 20 turns off, so that power switching module 10 turns off, at this time
The discharge loop of automobile batteries is cut off, automobile batteries no longer discharges, power supply state of cutting off the power.
Relative to the prior art, the utility model vehicle power supply power supply circuit is put out by self-locking module 30 of powering for a long time
In the case of fire, control switch control module 20 turns off so that power switching module 10 turns off so that automobile batteries stopping is put
Electricity, power supply state of cutting off the power.So as to avoid energy waste, automobile batteries is protected, effectively ensures that automobile for a long time
Can normally it start again after flame-out.
Fig. 2 is referred again to, Fig. 2 is the theory structure schematic diagram of another embodiment of the utility model vehicle power supply power supply circuit.
As shown in Fig. 2, based on vehicle power supply power supply circuit shown in FIG. 1, in another embodiment of the utility model, this practicality
Novel on-vehicle power-supplying circuit further includes igniting wake-up module 40 and charging wake-up module 50.
The output terminal of the igniting wake-up module 40 and the output terminal of the charging wake-up module 50 are controlled with the switch
The input terminal connection of molding block 20, the igniting wake-up module 40, the charging wake-up module 50 are respectively in automotive ignition, automobile
Output power supply enabling signal is defeated the power switching module 10 to be controlled to be connected to the switch control module 20 when battery charges
Go out the supply voltage.
In the present embodiment, in the case where automotive ignition starts, automobile engine power generation or automobile batteries electric discharge, igniting
The output of wake-up module 40 power supply enabling signal controls switch control module 20, and then power supply is controlled to open to switch control module 20
It closes module 10 to be connected, automobile engine or the supply voltage of automobile batteries output are exported to power input VIN at this time, and power supply is defeated
Enter to hold the supply voltage that VIN is accessed to be exported by power switching module 10 to power output end VOUT, so as to be exported by power supply
End VOUT exports the supply voltage to the electricity consumption load supplying of vehicle communication terminal.
In the case of automobile charge initiation, automobile batteries charging, the charging output power supply of wake-up module 50 enabling signal is extremely
Switch control module 20 controls switch control module 20, and then power switching module 10 is controlled to be connected, and automobile batteries exports at this time
Supply voltage export to power input VIN, which is exported by power switching module 10 to power output end
VOUT, so as to be exported the supply voltage to the electricity consumption load supplying of vehicle communication terminal by power output end VOUT.
The utility model exports power supply enabling signal in the case where automotive ignition starts, by igniting wake-up module 40 and starts
In the case of automobile charge initiation, power supply enabling signal startup power supply is exported by charging wake-up module 50 for power supply power supply state
Power supply state after vehicle communication terminal normal work, exports latch signal control power supply by power supply self-locking module 30 and persistently supplies
Electricity, locking vehicle power supply power supply circuit enter power supply power supply state, and power supply power supply at this time is not by igniting wake-up module 40 or charging
The influence for the power supply enabling signal that wake-up module 50 exports.
Fig. 3 is the electrical block diagram of one embodiment of the utility model vehicle power supply power supply circuit.
In one specific embodiment of the utility model, as shown in figure 3, the power switching module 10 includes metal-oxide-semiconductor Q1, voltage stabilizing
Diode ZD1 and first resistor R1.Metal-oxide-semiconductor Q1 is PMOS tube or NMOS tube, and preferably, metal-oxide-semiconductor Q1 is 8 hem facing pieces to the present embodiment
Formula PMOS tube, naturally it is also possible to be replaced with the direct insertion PMOS tube of 3 feet, be not restricted herein.
The grid G of the metal-oxide-semiconductor Q1 is connect with the output terminal of the switch control module 20, and the grid G warp of metal-oxide-semiconductor Q1
It is connect by the first resistor R1 with the power input VIN, the source S of the metal-oxide-semiconductor Q1 and the power input VIN
Connection, the drain D of the metal-oxide-semiconductor Q1 are connect with the power output end VOUT.
The cathode of the zener diode ZD1 is connect with the power input VIN, and with the source S of the metal-oxide-semiconductor Q1
Connection, the anode of the zener diode ZD1 are connect with the grid G of the metal-oxide-semiconductor Q1.
Voltage stabilizing is carried out to the supply voltage that power input VIN is accessed by zener diode ZD1, is powered to vehicle power supply
Circuit is protected.
As shown in figure 3, the switch control module 20 includes triode Q2 and second resistance R2.The present embodiment preferably,
Triode Q2 is NPN triode, and certainly, in the embodiment of a simple substitute, triode Q2 can be replaced with PNP triode,
It is not restricted herein.
The base stage of the triode Q2 is connect with the output terminal of the power supply self-locking module 30, the current collection of the triode Q2
Pole is connect via the second resistance R2 with the control terminal of the power switching module 10, in specific such as Fig. 3, the collection of triode Q2
Electrode is connect via second resistance R2 with the grid G of metal-oxide-semiconductor Q1, the emitter ground connection of the triode Q2.
As shown in figure 3, the power supply self-locking module 30 includes microcontroller U1,3rd resistor R3 and the first diode D1.
The anode of the first diode D1 is defeated via the latch signal of the 3rd resistor R3 and the microcontroller U1
Outlet connects, and the cathode of the first diode D1 is connect with the input terminal of the switch control module 20, in specific such as Fig. 3,
The cathode of first diode D1 is connect with the base stage of triode Q2.
As shown in figure 3, the igniting wake-up module 40 includes igniting wake-up voltage input terminal VCC and the second diode D2.
The igniting wake-up voltage input terminal VCC is used to be connected to automobile ignition switch, the sun of the second diode D2
Pole is connect with the igniting wake-up voltage input terminal VCC, cathode and the switch control module 20 of the second diode D2
Input terminal connection, specific as in Fig. 3, the cathode of the first diode D1 is connect with the base stage of triode Q2.
Specifically, the igniting wake-up module 40 further includes the 4th resistance R4 and the 5th resistance R5, the 4th resistance R4 and the
Five resistance R5 are as divider resistance.
One end of the 4th resistance R4 is connect with the igniting wake-up voltage input terminal VCC, the 4th resistance R4's
The other end is grounded via the 5th resistance R5, the public connecting end of the 4th resistance R4 and the 5th resistance R5 with it is described
The anode connection of second diode D2.
As shown in figure 3, the charging wake-up module 50 includes charging wake-up voltage input terminal CHARGE and third diode
D3。
The charging wake-up voltage input terminal CHARGE enables switch, the third diode for being connected to automobile charging
The anode of D3 is connect with the charging wake-up voltage input terminal CHARGE, and the cathode of the third diode D3 is controlled with the switch
The input terminal connection of molding block 20, specific as in Fig. 3, the cathode of the first diode D1 is connect with the base stage of triode Q2.
Specifically, the charging wake-up module 50 further includes the 6th resistance R6 and the 7th resistance R7, the 6th resistance R6 and the
Seven resistance R7 are as divider resistance.
One end of the 6th resistance R6 is connect with the igniting wake-up voltage input terminal VCC, the 6th resistance R6's
The other end is grounded via the 7th resistance R7, the public connecting end of the 6th resistance R6 and the 7th resistance R7 with it is described
The anode connection of third diode D3.
With reference to Fig. 1 to Fig. 3, the operation principle of the utility model vehicle power supply power supply circuit is described in detail below：
In the case where automotive ignition starts, automobile engine power generation or automobile batteries electric discharge, automobile engine or automobile
The supply voltage of battery output is exported to power input VIN.Simultaneously as automobile ignition switch is opened, wake-up voltage of lighting a fire
Input terminal VCC putting high level voltage signals, at this time the high level voltage signal value and automobile engine or automobile batteries output
Supply voltage it is equal, the high level voltage signal after the 4th resistance R4 and the 5th resistance R5 partial pressures output to the two or two pole
The anode of pipe D2, at this point, the second diode D2 is connected, the high level voltage signal warp of igniting wake-up voltage input terminal VCC inputs
It crosses the branch pressure voltage signal exported after the 4th resistance R4 and the 5th resistance R5 partial pressures to export to switch control module 20, be controlled to switch
The base stage of triode Q2 adds forward voltage in molding block 20 so that triode Q2 is connected, so as to which second resistance R2 is by metal-oxide-semiconductor Q1
Grid G drag down.At this point, the grid G and source S of metal-oxide-semiconductor Q1 form Negative Pressure Difference, metal-oxide-semiconductor Q1 conductings.Power input at this time
The supply voltage of VIN accesses is exported by metal-oxide-semiconductor Q1 to power output end VOUT, and power output end VOUT is defeated by the supply voltage
Go out to the electricity consumption load supplying of vehicle communication terminal.
In the case of automobile charge initiation, automobile batteries charging, the supply voltage of automobile batteries output is exported to power supply
Input terminal VIN.Simultaneously as the enabled switch of automobile charging is opened, charging wake-up voltage input terminal CHARGE input high level electricity
Signal is pressed, the high level voltage signal value is equal with the supply voltage that automobile batteries exports at this time, high level voltage signal warp
It is exported after crossing the 6th resistance R6 and the 7th resistance R7 partial pressures to the anode of third diode D3, at this point, third diode D3 is connected,
The high level voltage signal that the wake-up voltage input terminal CHARGE that charges is inputted is after the 6th resistance R6 and the 7th resistance R7 partial pressures
The branch pressure voltage signal of output is exported to switch control module 20, is added just to the base stage of triode Q2 in switch control module 20
To voltage so that triode Q2 is connected, so as to which second resistance R2 drags down the grid G of metal-oxide-semiconductor Q1 so that metal-oxide-semiconductor Q1 is connected.This
When power input VIN access supply voltage exported by metal-oxide-semiconductor Q1 will to power output end VOUT, power output end VOUT
The supply voltage is exported to the electricity consumption load supplying of vehicle communication terminal.
After automotive ignition startup or charge initiation, the vehicle communication terminal on automobile starts work, vehicle-mounted logical
After believing terminal normal work, the microcontroller U1 output latch signal B+_EN in power supply self-locking module 30, specifically, the self-locking
Signal B+_EN is high level signal, and the latch signal B+_EN of the high level is exported by 3rd resistor R3 to the first diode D1
Anode so that the first diode D1 be connected, so as to the high level latch signal B+_EN by the first diode D1 export to
The base stage of triode Q2 so that triode Q2 is connected, and second resistance R2 drags down the grid G of metal-oxide-semiconductor Q1 so that metal-oxide-semiconductor Q1 is led
It is logical.The supply voltage of power input VIN accesses at this time is exported by metal-oxide-semiconductor Q1 to power output end VOUT, power output end
VOUT exports the supply voltage to the electricity consumption load supplying of vehicle communication terminal.
The utility model vehicle power supply power supply circuit is after vehicle communication terminal normal work, i.e., in vehicle communication terminal just
In the case of often working or is standby, the latch signal B+_EN of high level that microcontroller U1 is exported in power supply self-locking module 30 makees
Triode Q2 conductings are controlled for power supply enabling signal, and then control metal-oxide-semiconductor Q1 conductings so that vehicle power supply power supply circuit enters lock
Determine state, maintain power supply power supply state.The break-make of triode Q2 is no longer waken up electricity by igniting wake-up voltage input terminal VCC or charging
The influence of the high level voltage signal of input terminal CHARGE inputs is pressed, i.e., power supply power supply state is no longer by igniting wake-up voltage input
Hold the influence of VCC or the high level voltage signal of charging wake-up voltage input terminal CHARGE inputs.
In the case where automobile flameout duration reaches preset time (such as 3 months), microcontroller in power supply self-locking module 30
The output of U1 cut-out latch signals B+_EN, i.e. microcontroller U1 output low level signals, the first pole pipe D1 cut-offs at this time, and then
Triode Q2 is also switched off, and the grid G of metal-oxide-semiconductor Q1 is by the bias voltage of first resistor R1 input high levels, metal-oxide-semiconductor Q1 shutdowns,
So as to cut off the discharge loop of automobile batteries so that automobile batteries no longer discharges, power supply state of cutting off the power.So as in automobile
After flame-out duration reaches preset time, the vehicle communication terminal on automobile no longer consumes automobile batteries, avoids the energy
Waste, can protect automobile batteries, effectively ensure that automobile can normally start again after long-time is flame-out.
The utility model also provides a kind of vehicle communication terminal, which is included with electric loading and vehicle power supply
Power supply circuit, the vehicle power supply power supply circuit are connect with electric loading, for electricity consumption load supplying or cut-out to electric loading
Power supply.Structure, operation principle and caused effective equal reference above-described embodiment of vehicle power supply power supply circuit, herein
It repeats no more.
The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention,
Every equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is directly or indirectly transported
Used in other related technical areas, it is equally included in the patent within the scope of the utility model.
Claims (10)
1. a kind of vehicle power supply power supply circuit, which is characterized in that including power input, power output end, power switching module,
Switch control module and power supply self-locking module；
For being connected to automobile batteries or engine, the power output end is used to be connected to vehicle-carrying communication the power input
Terminal uses electric loading；The input terminal of the power switching module is connect with the power input, the power switching module
Output terminal connect with the power output end；The power supply self-locking module is connect with the input terminal of the switch control module,
The output terminal of the switch control module is connect with the control terminal of the power switching module；
The supply voltage that power input access automobile batteries or engine provide, described in the power switching module control
Whether supply voltage, which is exported to the power output end, is given electricity consumption load supplying, and the switch control module controls the power supply to open
Close the break-make of module；Power supply self-locking module output latch signal to switch after vehicle communication terminal normal work is controlled
Molding block, the power switching module conducting to be controlled to export the supply voltage, and lock power supply power supply state, and in automobile
When flame-out duration reaches preset time, stop output latch signal to the switch control module, to cut off the supply voltage
Output.
2. vehicle power supply power supply circuit as described in claim 1, which is characterized in that the power switching module include metal-oxide-semiconductor,
Zener diode and first resistor；
The grid of the metal-oxide-semiconductor is connect with the output terminal of the switch control module, and via the first resistor and the electricity
Source input terminal connection, the source electrode of the metal-oxide-semiconductor are connect with the power input, and the drain electrode of the metal-oxide-semiconductor and the power supply are defeated
Outlet connects；The cathode of the zener diode is connect with the power input, and is connect with the source electrode of the metal-oxide-semiconductor, institute
The anode for stating zener diode is connect with the grid of the metal-oxide-semiconductor.
3. vehicle power supply power supply circuit as described in claim 1, which is characterized in that the switch control module includes triode
And second resistance；
The base stage of the triode is connect with the output terminal of the power supply self-locking module, and the collector of the triode is via described
Second resistance is connect with the control terminal of the power switching module, the emitter ground connection of the triode.
4. vehicle power supply power supply circuit as described in claim 1, which is characterized in that the power supply self-locking module includes microcontroller
Device, 3rd resistor and the first diode；
The anode of first diode is connect via the 3rd resistor with the latch signal output terminal of the microcontroller, institute
The cathode for stating the first diode is connect with the input terminal of the switch control module.
5. vehicle power supply power supply circuit according to any one of claims 1 to 4, which is characterized in that the vehicle power supply supplies
Circuit further includes igniting wake-up module and charging wake-up module；
It is described igniting wake-up module output terminal and it is described charging wake-up module output terminal with the switch control module
Input terminal connects, and the igniting wake-up module, the charging wake-up module export respectively in automotive ignition, automobile batteries charging
Enabling signal of powering is to the switch control module, the power switching module conducting to be controlled to export the supply voltage.
6. vehicle power supply power supply circuit as claimed in claim 5, which is characterized in that the igniting wake-up module includes igniting and calls out
Awake voltage input end and the second diode；
The igniting wake-up voltage input terminal is used to be connected to automobile ignition switch, the anode of second diode and the point
Fiery wake-up voltage input terminal connection, the cathode of second diode are connect with the input terminal of the switch control module.
7. vehicle power supply power supply circuit as claimed in claim 6, which is characterized in that the igniting wake-up module further includes the 4th
Resistance and the 5th resistance；
One end of 4th resistance is connect with the igniting wake-up voltage input terminal, and the other end of the 4th resistance is via institute
The 5th resistance eutral grounding, the 4th resistance and the public connecting end of the 5th resistance is stated with the anode of second diode to connect
It connects.
8. vehicle power supply power supply circuit as claimed in claim 5, which is characterized in that the charging wake-up module includes charging and calls out
Awake voltage input end and third diode；
The charging wake-up voltage input terminal enables switch, the anode of the third diode and institute for being connected to automobile charging
The input terminal connection of charging wake-up voltage is stated, the cathode of the third diode is connect with the input terminal of the switch control module.
9. vehicle power supply power supply circuit as claimed in claim 8, which is characterized in that the charging wake-up module further includes the 6th
Resistance and the 7th resistance；
One end of 6th resistance is connect with the igniting wake-up voltage input terminal, and the other end of the 6th resistance is via institute
The 7th resistance eutral grounding, the 6th resistance and the public connecting end of the 7th resistance is stated with the anode of the third diode to connect
It connects.
10. a kind of vehicle communication terminal, including with electric loading, which is characterized in that further include any one of claim 1 to 9 institute
The vehicle power supply power supply circuit stated, the vehicle power supply power supply circuit are connect with described with electric loading, for being born to the electricity consumption
It carries power supply or cuts off to the power supply with electric loading.
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| CN201721708430.4U CN207523615U (en) | 2017-12-08 | 2017-12-08 | Vehicle power supply power supply circuit and vehicle communication terminal |
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| CN201721708430.4U CN207523615U (en) | 2017-12-08 | 2017-12-08 | Vehicle power supply power supply circuit and vehicle communication terminal |
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| CN207523615U true CN207523615U (en) | 2018-06-22 |
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| CN109969106A (en) * | 2019-04-21 | 2019-07-05 | 常州轻工职业技术学院 | Vehicle-mounted ACC power control and method based on NMOS |
| CN110239464A (en) * | 2019-06-18 | 2019-09-17 | 中国煤炭科工集团太原研究院有限公司 | A kind of underground coal mine explosion-proof vehicle explosion isolation type low-voltage standby power supply device |
| CN110406486A (en) * | 2019-08-30 | 2019-11-05 | 湖北亿咖通科技有限公司 | Reduce method, system and the switching circuit of vehicle electronic device quiescent dissipation |
| CN111409567A (en) * | 2020-04-27 | 2020-07-14 | 徐州徐工汽车制造有限公司 | Automobile emergency power-off system and automobile thereof |
| CN111474871A (en) * | 2019-01-23 | 2020-07-31 | 青岛海尔洗衣机有限公司 | Power supply control device and method of household appliance control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111474871A (en) * | 2019-01-23 | 2020-07-31 | 青岛海尔洗衣机有限公司 | Power supply control device and method of household appliance control system |
| CN109969106A (en) * | 2019-04-21 | 2019-07-05 | 常州轻工职业技术学院 | Vehicle-mounted ACC power control and method based on NMOS |
| CN110239464A (en) * | 2019-06-18 | 2019-09-17 | 中国煤炭科工集团太原研究院有限公司 | A kind of underground coal mine explosion-proof vehicle explosion isolation type low-voltage standby power supply device |
| CN110239464B (en) * | 2019-06-18 | 2022-10-21 | 中国煤炭科工集团太原研究院有限公司 | Explosion-proof type low-voltage standby power supply device for coal mine underground explosion-proof vehicle |
| CN110406486A (en) * | 2019-08-30 | 2019-11-05 | 湖北亿咖通科技有限公司 | Reduce method, system and the switching circuit of vehicle electronic device quiescent dissipation |
| CN111409567A (en) * | 2020-04-27 | 2020-07-14 | 徐州徐工汽车制造有限公司 | Automobile emergency power-off system and automobile thereof |
| CN114002980A (en) * | 2021-10-29 | 2022-02-01 | 北京乐驾科技有限公司 | System and method for detecting automobile ignition moment, electronic equipment and storage medium |
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