CN109038800A - Power-supply system, vehicle communications device and the power control method of vehicle communications device - Google Patents
Power-supply system, vehicle communications device and the power control method of vehicle communications device Download PDFInfo
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- CN109038800A CN109038800A CN201810975387.0A CN201810975387A CN109038800A CN 109038800 A CN109038800 A CN 109038800A CN 201810975387 A CN201810975387 A CN 201810975387A CN 109038800 A CN109038800 A CN 109038800A
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- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The present invention relates to automobile-used power supply technical field more particularly to a kind of power-supply systems of vehicle communications device, vehicle communications device and power control method；The power-supply system includes the first triode Q1, the second triode Q2 and third transistor Q3；For connecting with electric quantity output end, the second output terminal of the first triode Q1 is connect the first output end of the first triode Q1 with the first output end of the second triode Q2；The input terminal of the second triode Q2 is connect with the first output end of the third transistor Q3；The power-supply system of vehicle communications device is made up of the first triode Q1, the second triode Q2 and third transistor Q3, realize seamless switching of the electric quantity output end between backup power source and main power source, solve the problems, such as two sets of power supply system switchings, the MCU such as single-chip microcontroller control is not needed, automatically switched according to different realize of external condition, low in cost, performance is stablized, high reliablity.
Description
Technical field
The present invention relates to automobile-used power supply technical field more particularly to a kind of power-supply systems of vehicle communications device, vehicle
Carrier communication device and power control method.
Background technique
The main direction of development of the new-energy automobile as current automotive field.With the development of electronic technology, to vehicle-mounted logical
The reliability requirement for interrogating the power supply of device (such as TBOX device) is higher and higher, because vehicle communications device needs lasting supply
Electricity, for exporting vehicle position information, monitoring control information, vehicle communications device requires uninterrupted power supply, it is most of not between
Cut-off electric system is all made of a main power source and a backup power source, and after main power source power down, electronic equipment is in reserve battery
It can still work normally under power supply power supply.Handoff technique between main power source and backup power source is widely used in dual power supply
In application scenarios.
Traditional power supply handover scheme is powered using the single-phase on state characteristic switch mains power and backup power source of diode, but
It is that the forward conduction voltage drop of diode and forward conduction resistance make its working efficiency lower, and make due to increasing diode
At the increase of application cost.
Another is to be led based on the power supply handover scheme of MOS (Metal-oxide-semicondutor) switch using metal-oxide-semiconductor
Logical loss is low, the advantages that being easily integrated, and the program gradually instead of the power supply handover scheme based on diode, becomes power supply switching
The mainstream of scheme, but Railway Project intrinsic in primary, spare power supply handover scheme is still unresolved: first, high voltage
Backup power source needs system to have an active handoff functionality when switching to the main power source of low-voltage, existing scheme or only realizes which electricity
Pressure is high complicated using which power supply or switching circuit；Second, the substrate electric potential connectivity problem of MOS switch pipe, existing program is adopted
Switched with substrate electric potential, not only complicated and performance is unstable for this scheme, the decline of Electro-static Driven Comb performance is also resulted in, this is because cutting
The substrate electric potential for changing metal-oxide-semiconductor will connect maximum potential, so to determine that the substrate of metal-oxide-semiconductor connects according to the voltage levels of duplex feeding
Mode is connect, is all declined to a great extent using ESD after this scheme and stability；Third will lead to switching in primary, spare power supply handoff procedure
The problem of switch vibrates back and forth；Fourth, in the presence of the risk that can not normally power on.
Therefore, to solve the above-mentioned problems, it is badly in need of inventing power-supply system, the vehicle mounted communication of a kind of new vehicle communications device
Device and power control method.
Summary of the invention
It is an object of the invention to: power-supply system, vehicle communications device and the power supply control of a kind of vehicle communications device are provided
Method processed does not need the MCU such as single-chip microcontroller control, is automatically switched according to different realize of external condition, circuit structure is simple, design
Dexterity, low in cost, performance is stablized.
The present invention provides following proposals:
A kind of power-supply system of vehicle communications device, including the first triode Q1, the second triode Q2 and third transistor
Q3；
The first output end of the first triode Q1 is connect with electric quantity output end, and the second of the first triode Q1 is defeated
Outlet is connect with the first output end of the second triode Q2, the input terminal of the first triode Q1 and the one or three pole
First resistor R1 is connected between the second output terminal of pipe Q1；
The input terminal of the second triode Q2 is connect with the first output end of the third transistor Q3, and the described 2nd 3
The second output terminal of pole pipe Q2 is grounded, the second output terminal of the input terminal of the second triode Q2 and the second triode Q2
Between be connected with the 5th resistance R5；
The second output terminal of the third transistor Q3 is grounded, the input terminal of the third transistor Q3 and the described 3rd 3
The 7th resistance R7 is connected between the second output terminal of pole pipe Q3；
It connects between the input terminal of the first triode Q1 and the first output end of the third transistor Q3 standby electricity
Source；It connects between the first output end of the first triode Q1 and the input terminal of the third transistor Q3 main power source.
Preferably, the power-supply system of the vehicle communications device further includes diode D, and the of the first triode Q1
One output end is connect with the backward end of the diode D, and the forward end of the diode is connect with the main power source.
Preferably, the power-supply system of the vehicle communications device further includes 3rd resistor R3, the third transistor Q3
The first output end connect with one end of the 3rd resistor R3, the other end of the 3rd resistor R3 and the backup power source connect
It connects.
Preferably, the power-supply system of the vehicle communications device further includes the 6th resistance R6, the third transistor Q3
Input terminal connect with one end of the 6th resistance R6, the other end of the 6th resistance R6 is connect with the main power source.
Preferably, the power-supply system of the vehicle communications device further includes second resistance R2, the first triode Q1
Second output terminal connect with one end of the second resistance R2, the other end of the second resistance R2 and second triode
The first output end of Q2 connects.
Preferably, the power-supply system of the vehicle communications device further includes the 4th resistance R4, the second triode Q2
Input terminal connect with one end of the 4th resistance R4, the other end of the 4th resistance R4 and the third transistor Q3's
The connection of first output end.
Preferably, the power-supply system of the vehicle communications device further includes first capacitor C1, the second capacitor C2 and third
The first capacitor plate of capacitor C3, the third capacitor C3 and the points of common connection of the 6th resistance R6 and the 7th resistance R7
Connection, the second capacitor plate earthing of the third capacitor C3；The first capacitor plate of the first capacitor C1 and the one or three pole
The first output end of pipe Q1 connects, the second capacitor plate earthing of the first capacitor C1；The second capacitor C2 and described first
Capacitor C1 is in parallel.
Further, the present invention also provides a kind of vehicle communications device, the power supply including the vehicle communications device
System.
Further, the present invention also provides a kind of power supplys of vehicle communications device based on the vehicle communications device
The implementation method of system, comprising the following steps:
When the main power source is in running order, the third transistor Q3 is connected, then the both ends the 4th resistance R4
Voltage value be zero；The second triode Q2 cut-off at this time, while the first triode Q1 ends, the backup power source is not
Work is at this time electric quantity output end power supply by the main power source；
When the main power source, which decays to its voltage value, is less than the threshold voltage of the third transistor, the three or three pole
Pipe Q3 cut-off, then the voltage at the both ends the 4th resistance R4 causes the second triode Q2 to be connected, the second triode Q2
Once conducting, then the first triode Q1 conducting, the backup power source work, the backward end cut-off of the diode D, at this time
It is electric quantity output end power supply by the backup power source.
Preferably, the power control method that the power-supply system of the vehicle communications device is realized, it is characterised in that: also wrap
Impact when rising Voltage Drop using the 4th capacitor C4 is included to buffer.
It is that the present invention generates the utility model has the advantages that
1, the power-supply system of vehicle communications device disclosed in this invention, vehicle communications device and implementation method pass through
One triode Q1, the second triode Q2 and third transistor Q3 constitute the power-supply system of vehicle communications device, realize vehicle mounted communication
Seamless switching of the power supply of the electric quantity output end of device power supply between backup power source and main power source solves vehicle-mounted logical
The uninterrupted power supply problem of device and the problem of two sets of power supply systems switching are interrogated, the MCU such as single-chip microcontroller control is not needed, according to outer
Different realize of boundary's condition is automatically switched, and circuit structure is simple, and design is dexterous, and low in cost, performance is stablized, can be according to difference
Environment is finely adjusted.
2, the first output end of the first triode Q1 is connect by diode D with main power source, the third transistor
The first output end of Q3 is connect by 3rd resistor R3 with backup power source, and the input terminal of the third transistor Q3 passes through the 6th electricity
Resistance R6 is connect with main power source, and the second output terminal of the first triode Q1 passes through second resistance R2 and the second triode Q2
The first output end connection；The input terminal of the second triode Q2 pass through the 4th resistance R4 and the third transistor Q3 the
The connection of one output end；By the way that multiple and different divider resistances is arranged, it can be realized the regulation of power supply switch speed, realize electricity
The controllability on road；
3, the power-supply system of the vehicle communications device further includes first capacitor C1, the second capacitor C2 and third capacitor
The first capacitor plate of C3, the third capacitor C3 and the points of common connection of the 6th resistance R6 and the 7th resistance R7 connect
It connects, the second capacitor plate earthing of the third capacitor C3；The first capacitor plate of the first capacitor C1 and first triode
The first output end of Q1 connects, the second capacitor plate earthing of the first capacitor C1；The second capacitor C2 and first electricity
It is in parallel to hold C1；Capacitor is buffered by setting, during power supply switching, a buffering is played to Voltage Drop and rising
Effect reduces the impact to circuit, improves the stability and reliability of circuit.
Detailed description of the invention
Fig. 1 is the circuit diagram (integrated circuit) of the power-supply system of vehicle communications device of the invention；
Fig. 2 is the circuit diagram (main power source working condition) of the power-supply system of vehicle communications device of the invention；
Fig. 3 is the circuit diagram (backup power source working condition) of the power-supply system of vehicle communications device of the invention；
Fig. 4 is the block diagram of the control method of the power-supply system of vehicle communications device of the invention.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Referring to FIG. 1 to FIG. 4, a kind of power-supply system of vehicle communications device, including the first triode Q1, the two or three pole
Pipe Q2 and third transistor Q3；The first output end of the first triode Q1 is connect with electric quantity output end, the one or three pole
The second output terminal of pipe Q1 is connect with the first output end of the second triode Q2, the input terminal of the first triode Q1 and
First resistor R1 is connected between the second output terminal of the first triode Q1；The input terminal of the second triode Q2 and institute
State the first output end connection of third transistor Q3, the second output terminal ground connection of the second triode Q2, the two or three pole
The 5th resistance R5 is connected between the input terminal of pipe Q2 and the second output terminal of the second triode Q2；The third transistor
The second output terminal of Q3 is grounded, between the input terminal of the third transistor Q3 and the second output terminal of the third transistor Q3
It is connected with the 7th resistance R7；It is gone here and there between the input terminal of the first triode Q1 and the first output end of the third transistor Q3
Join backup power source；It connects between the first output end of the first triode Q1 and the input terminal of the third transistor Q3 main electricity
Source.
The power-supply system of the power-supply system of vehicle communications device described in the present embodiment, the vehicle communications device is also wrapped
Diode D is included, the first output end of the first triode Q1 is connect with the backward end of the diode D, the diode
Forward end is connect with the main power source.The power-supply system of the vehicle communications device further includes 3rd resistor R3, the third
The first output end of triode Q3 is connect with one end of the 3rd resistor R3, the other end of the 3rd resistor R3 with it is described standby
It is connected with power supply.The power-supply system of the vehicle communications device further includes the 6th resistance R6, and the third transistor Q3's is defeated
Enter end to connect with one end of the 6th resistance R6, the other end of the 6th resistance R6 is connect with the main power source.Described
The power-supply system of vehicle communications device further includes second resistance R2, the second output terminal and described second of the first triode Q1
One end of resistance R2 connects, and the other end of the second resistance R2 is connect with the first output end of the second triode Q2.Institute
The power-supply system for the vehicle communications device stated further includes the 4th resistance R4, the input terminal and the described 4th of the second triode Q2
One end of resistance R4 connects, and the other end of the 4th resistance R4 is connect with the first output end of the third transistor Q3.Institute
The power-supply system for the vehicle communications device stated further includes first capacitor C1, the second capacitor C2 and third capacitor C3, the third electricity
The first capacitor plate for holding C3 is connect with the points of common connection of the 6th resistance R6 and the 7th resistance R7, the third capacitor
The second capacitor plate earthing of C3；The first output end of the first capacitor plate of the first capacitor C1 and the first triode Q1 connect
It connects, the second capacitor plate earthing of the first capacitor C1；The second capacitor C2 is in parallel with the first capacitor C1.The electricity
Output end is used to connect each electricity consumption device in vehicle communications device, such as central controller, voltage-stablizer.
The present embodiment also discloses a kind of vehicle communications device, the power-supply system including the vehicle communications device.
The present embodiment also discloses a kind of power-supply system of vehicle communications device based on the vehicle communications device
Implementation method, comprising the following steps: when the main power source is in running order, the third transistor Q3 conducting is then described
The voltage value at the 4th both ends resistance R4 is zero；The second triode Q2 cut-off at this time, while the first triode Q1 ends,
The backup power source does not work, and is at this time electric quantity output end power supply by the main power source；When the main power source is in the shape that do not work
When state, the third transistor Q3 cut-off, then the voltage at the both ends the 4th resistance R4 causes the second triode Q2 to be connected,
The second triode Q2 is once be connected, then the first triode Q1 conducting, the backup power source work, the diode D
Backward end cut-off, at this time by the backup power source be electric quantity output end power.The automatic switchover system power supply
Power supply implementation method further include: the resistance value of the 6th resistance R6 and the 7th resistance R7 of adjustment realizes that the quick of system seamless cuts
It changes；The determination of the resistance value of the 6th resistance R6 and the 7th resistance R7 is completed when designing circuit.
The power-supply system of vehicle communications device described in the present embodiment, including the first triode Q1, the second triode Q2 and
Third transistor Q3；The first output end of the first triode Q1 with electric quantity output end for connecting, first triode
The second output terminal of Q1 is connect with the first output end of the second triode Q2, the input terminal of the first triode Q1 and institute
It states and is connected with first resistor R1 between the second output terminal of the first triode Q1；The input terminal of the second triode Q2 with it is described
The first output end of third transistor Q3 connects, the second output terminal ground connection of the second triode Q2, second triode
The 5th resistance R5 is connected between the input terminal of Q2 and the second output terminal of the second triode Q2；The third transistor Q3
Second output terminal ground connection, connect between the input terminal of the third transistor Q3 and the second output terminal of the third transistor Q3
It is connected to the 7th resistance R7；It is used between the input terminal of the first triode Q1 and the first output end of the third transistor Q3
Series connection backup power source；For going here and there between the first output end of the first triode Q1 and the input terminal of the third transistor Q3
Join main power source；The power supply system of vehicle communications device is made up of the first triode Q1, the second triode Q2 and third transistor Q3
System realizes seamless switching of the electric quantity output end between backup power source and main power source, solves the uninterrupted of vehicle communications device
Powerup issue and the problem of two sets of power supply systems switching, do not need the MCU such as single-chip microcontroller control, real according to the difference of external condition
Now automatically switch, circuit structure is simple, and design is dexterous, and low in cost, performance is stablized, and can be finely adjusted according to varying environment.
First output end of the power-supply system of vehicle communications device described in the present embodiment, the first triode Q1 passes through
Diode D is connect with main power source, and the first output end of the third transistor Q3 is connect by 3rd resistor R3 with backup power source,
The input terminal of the third transistor Q3 is connect by the 6th resistance R6 with main power source, the second output of the first triode Q1
End is connect by second resistance R2 with the first output end of the second triode Q2；The input terminal of the second triode Q2 is logical
The 4th resistance R4 is crossed to connect with the first output end of the third transistor Q3；By the way that multiple and different divider resistances, energy is arranged
The regulation for enough realizing power supply switch speed, realizes the controllability of circuit；
The power-supply system of the power-supply system of vehicle communications device described in the present embodiment, the vehicle communications device is also wrapped
Include the first capacitor plate and the 6th resistance of first capacitor C1, the second capacitor C2 and third capacitor C3, the third capacitor C3
R6 is connected with the points of common connection of the 7th resistance R7, the second capacitor plate earthing of the third capacitor C3；First electricity
The first capacitor plate for holding C1 is connect with the first output end of the first triode Q1, the second capacitor board of the first capacitor C1
Ground connection；The second capacitor C2 is in parallel with the first capacitor C1；Capacitor is buffered by setting, in the process of power supply switching
In, a buffer function played to Voltage Drop and rising, reduces the impact to circuit, improves the stability of circuit and reliable
Property.
The power-supply system of vehicle communications device described in the present embodiment, suitable for having two sets of power supply systems and needing automatic
The Vehicle Controller of seamless switching, by the way that (full name should be three pole of semiconductor with capacitor, resistor, diode, triode
Pipe, also referred to as bipolar junction transistor, transistor (hereinafter referred to as triode)) and Metal-Oxide Semiconductor field-effect crystalline substance
Body pipe, abbreviation metal-oxide half field effect transistor (hereinafter referred to as MOSFET) build the switching circuit system of a set of efficient stable.
The power-supply system of vehicle communications device described in the present embodiment, triode are a kind of semiconductor devices for controlling electric current
Its effect is small-signal to be zoomed into the biggish electric signal of range value, also serves as noncontacting switch.By there are two types of materials point: germanium
Pipe and silicone tube.And each has two kinds of structure types of NPN and PNP, but most commonly used is two kind of three pole silicon NPN and germanium PNP
Pipe, (wherein, N is the meaning (representing Negative in English) of cathode, and phosphorus is added in high purity silicon and replaces one for N-type semiconductor
A little silicon atoms generate free electronic conduction under voltage stimulation, and the meaning (Positive) that P is anode is that boron is added to replace
Silicon generates a large amount of holes and is conducive to conduction).MOSFET is a kind of field effect crystalline substance that can be widely used in analog circuit and digital circuit
Body pipe (field-effect transistor).MOSFET is different according to the polarity of its " channel " (work carrier), can be divided into
The two types of " N-type " and " p-type ", also commonly known as NMOSFET and PMOSFET, other are referred to as still including NMOS, PMOS etc..
The power-supply system of vehicle communications device described in the present embodiment, capacitance versus voltage fall rising and play a buffering work
With；Resistance: by the combination of a variety of different resistance, different voltage dividing branch is built；Triode: this system selects N-type triode,
With the high-speed switch performance of N-type triode；MOSFET: this system selects P-channel enhancement type MOSFET (abbreviation PMOS), uses
Its electric conductivity: between grid source electrode plus positive voltage UGS, grid are insulation, realize drain electrode and source conductive；Diode: two are selected
Pole pipe forward conduction, the function of reversely ending.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of power-supply system of vehicle communications device, it is characterised in that: including the first triode, the second triode and the three or three
Pole pipe；
First output end of first triode is connect with electric quantity output end, the second output terminal of first triode and institute
State the first output end connection of the second triode, the second output of the input terminal of first triode and first triode
First resistor is connected between end；
The input terminal of second triode is connect with the first output end of the third transistor, and the of second triode
Two output ends ground connection, is connected with the 5th between the input terminal of second triode and the second output terminal of second triode
Resistance；
The second output terminal of the third transistor is grounded, and the of the input terminal of the third transistor and the third transistor
The 7th resistance is connected between two output ends；
It connects between the input terminal of first triode and the first output end of the third transistor backup power source；Described
It connects between first output end of one triode and the input terminal of the third transistor main power source.
2. the power-supply system of vehicle communications device according to claim 1, it is characterised in that: it further include diode, it is described
First output end of the first triode is connect with the backward end of the diode, the forward end of the diode and the main power source
Connection.
3. the power-supply system of vehicle communications device according to claim 2, it is characterised in that: it further include 3rd resistor, institute
The first output end for stating third transistor is connect with one end of the 3rd resistor R3, the other end of the 3rd resistor with it is described
Backup power source connection.
4. the power-supply system of vehicle communications device according to claim 3, it is characterised in that: further include the 6th resistance, institute
The input terminal for stating third transistor is connect with one end of the 6th resistance, the other end and the main power source of the 6th resistance
Connection.
5. the power-supply system of vehicle communications device according to claim 4, it is characterised in that: it further include second resistance, institute
The second output terminal for stating the first triode is connect with one end of the second resistance, the other end of the second resistance and described the
First output end of two triodes connects.
6. the power-supply system of vehicle communications device according to claim 5, it is characterised in that: further include the 4th resistance, institute
The input terminal for stating the second triode is connect with one end of the 4th resistance, the other end and the described 3rd 3 of the 4th resistance
First output end of pole pipe connects.
7. the power-supply system of vehicle communications device according to claim 6, it is characterised in that: further include first capacitor,
Two capacitors and third capacitor, the public company of the first capacitor plate of the third capacitor and the 6th resistance and the 7th resistance
Contact connection, the second capacitor plate earthing of the third capacitor；The first capacitor plate of the first capacitor and the one or three pole
First output end of pipe connects, the second capacitor plate earthing of the first capacitor；Second capacitor and the first capacitor are simultaneously
Connection.
8. a kind of vehicle communications device, it is characterised in that: the electricity including the vehicle communications device as described in any in claim 1-7
Source system.
9. the power control method that a kind of power-supply system of vehicle communications device as claimed in claim 6 is realized, it is characterised in that:
The following steps are included:
When the main power source is in running order, the third transistor is connected, then the voltage at the both ends the 4th resistance R4
Value is zero；The second triode cut-off at this time, while first triode ends, the backup power source does not work, at this time
It is electric quantity output end power supply by the main power source；
When the main power source, which decays to its voltage value, is less than the threshold voltage of the third transistor, the third transistor is cut
Only, then the voltage at the 4th resistance both ends leads to second triode ON, and second triode is once connected, then institute
The first triode ON, the backup power source work are stated, the backward end cut-off of the diode is by the backup power source at this time
Electric quantity output end power supply.
10. the power control method that the power-supply system of vehicle communications device according to claim 9 is realized, feature exist
In: further include:
Impact when being risen using the 4th capacitor C4 to Voltage Drop is buffered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810975387.0A CN109038800A (en) | 2018-08-24 | 2018-08-24 | Power-supply system, vehicle communications device and the power control method of vehicle communications device |
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| CN201810975387.0A CN109038800A (en) | 2018-08-24 | 2018-08-24 | Power-supply system, vehicle communications device and the power control method of vehicle communications device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110994774A (en) * | 2019-11-11 | 2020-04-10 | 广州亚美智造科技有限公司 | Power supply switching circuit |
| CN112271343A (en) * | 2020-09-17 | 2021-01-26 | 武汉光庭科技有限公司 | Power saving module and method for standby battery in TBOX |
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| CN107623377A (en) * | 2017-09-21 | 2018-01-23 | 黄生林 | Power circuit based on power monitoring equipment |
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| CN101872998A (en) * | 2010-01-14 | 2010-10-27 | 杭州海康威视数字技术股份有限公司 | Power supply switching circuit |
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| CN112271343A (en) * | 2020-09-17 | 2021-01-26 | 武汉光庭科技有限公司 | Power saving module and method for standby battery in TBOX |
| CN112271343B (en) * | 2020-09-17 | 2022-03-29 | 武汉光庭科技有限公司 | Power saving module and method for standby battery in TBOX |
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