CN106740133A - The vehicle-mounted CAN power circuit of electric automobile, electric automobile and its power-supply system - Google Patents
The vehicle-mounted CAN power circuit of electric automobile, electric automobile and its power-supply system Download PDFInfo
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- CN106740133A CN106740133A CN201611255839.5A CN201611255839A CN106740133A CN 106740133 A CN106740133 A CN 106740133A CN 201611255839 A CN201611255839 A CN 201611255839A CN 106740133 A CN106740133 A CN 106740133A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
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Abstract
Vehicle-mounted CAN power circuit, electric automobile and its power circuit the invention discloses a kind of electric automobile, the electric power system of electric automobile include high voltage power supply and low-tension supply, and vehicle-mounted CAN power circuit includes：CAN power supply units, it is used to exporting CAN power supplys is powered with the CAN to electric automobile；Enabling unit, its output end is connected with the Enable Pin of CAN power supply units, the control signal of its control chip output for being used to receive high voltage power supply, wherein, when the high voltage power supply normal power supply of electric automobile, the control chip of high voltage power supply exports the first control signal to enabling unit so that enabling unit outputs enable signal to CAN power supply units, and CAN power supply units are operated；When the high voltage power supply power down of electric automobile, the control chip of high voltage power supply exports the second control signal to enabling unit so that enabling unit output stops enabling signal to CAN power supply units, CAN power supply units are stopped, so as to reduce the current drain under holding state, the qualification rate of inspection is improve.
Description
Technical field
The present invention relates to power technique fields, the vehicle-mounted CAN power circuit of more particularly to a kind of electric automobile, one kind are electronic
The power-supply system of automobile and a kind of electric automobile.
Background technology
Electric automobile in correlation technique is generally powered using dual power supply, i.e. high voltage power supply and low-tension supply, works as electricity
Electrical automobile is in standby or security protection state, such as when fuel power car shuts down flame-out, high voltage power supply is stopped power supply, only low pressure
Power supply is powered, and now needs to reduce the power consumption of electric automobile, to extend stand-by time.
In the related art, electric automobile generally has CAN (Controller Area Network, controller LAN
Network) bus communication function, when electric automobile is in holding state, by controlling vehicle-mounted CAN bus chip in a dormant state
To reduce power consumption.But correlation technique has the drawback that, CAN chip electric current in the dormant state can reach 100 μ A
Rank, and now the power supply unit of CAN chip is in light condition, the quiescent current of peripheral circuit can reach 1mA, be higher than
Standby current higher limit specified in the technical requirements of depot (such as 700 μ A).Due to the discreteness of parameters of electronic device, right
When the electric automobile of batch production is inspected by random samples, easily there is the excessive caused vehicle disqualified upon inspection problem of standby current.
Therefore, correlation technique needs to be improved.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.Therefore, of the invention
One purpose is the vehicle-mounted CAN power circuit for proposing a kind of electric automobile, and the circuit can be standby in electric automobile (flame-out)
The current drain of CAN interface circuit is reduced afterwards.
It is another object of the present invention to propose a kind of power-supply system of electric automobile.A further object of the present invention exists
In a kind of electric automobile of proposition.
To reach above-mentioned purpose, one aspect of the present invention embodiment proposes a kind of vehicle-mounted CAN power circuit of electric automobile,
The electric power system of the electric automobile includes high voltage power supply and low-tension supply, and the vehicle-mounted CAN power circuit includes：CAN powers
Unit, the CAN power supply units are powered for exporting CAN power supplys with the CAN to the electric automobile；Enabling unit, institute
The output end for stating enabling unit is connected with the Enable Pin of the CAN power supply units, and the enabling unit is used to receive the high pressure
The control signal of the control chip output of power supply, wherein, when the high voltage power supply normal power supply of the electric automobile, the high pressure
The control chip of power supply exports the first control signal to the enabling unit so that the enabling unit outputs enable signal to institute
CAN power supply units are stated, the CAN power supply units are operated；When the high voltage power supply power down of the electric automobile, the high pressure
The control chip of power supply exports the second control signal to the enabling unit so that enabling unit output stops enabling signal
To the CAN power supply units, the CAN power supply units are stopped.
The vehicle-mounted CAN power circuit of the electric automobile for proposing according to embodiments of the present invention, in the high voltage power supply of electric automobile
During normal power supply, the control chip of high voltage power supply exports the first control signal to enabling unit so that enabling unit output enables letter
Number to CAN power supply units, CAN power supply units are operated when receiving and enabling signal, fall in the high voltage power supply of electric automobile
When electric, the control chip of high voltage power supply exports the second control signal to enabling unit so that enabling unit output stops enabling signal
To CAN power supply units, CAN power supply units are stopped when receiving and enabling signal such that it is able to reduce CAN under holding state
The current drain of interface circuit, it is to avoid vehicle disqualified upon inspection problem caused by standby current is excessive, improves the conjunction of inspection
Lattice rate.
According to one embodiment of present invention, the CAN power supply units include low pressure difference linear voltage regulator LDO.
According to one embodiment of present invention, the enabling unit includes：First resistor, one end of the first resistor with
The output end of the control chip of the high voltage power supply is connected；First triode, the base stage of first triode and described first
The other end of resistance is connected, the grounded emitter of first triode；Second resistance, the second resistance is connected to described
Between the emitter stage of the base stage of one triode and first triode；Optocoupler, the first pin and the default power supply of the optocoupler
It is connected, the second pin of the optocoupler is connected by 3rd resistor with the colelctor electrode of first triode；First metal-oxide-semiconductor, institute
The grid for stating the first metal-oxide-semiconductor is connected with the three-prong of the optocoupler, the source electrode of first metal-oxide-semiconductor and the 4th of the optocoupler
Pin is connected to the chip Enable Pin of the LDO after being connected, the drain electrode of first metal-oxide-semiconductor by the 4th resistance with it is described
The chip input of LDO is connected；5th resistance, one end of the 5th resistance is connected with the source electrode of first metal-oxide-semiconductor, described
Another termination reference ground of the 5th resistance.
According to one embodiment of present invention, the vehicle-mounted CAN power circuit of the electric automobile also includes：Current-limiting resistance,
One end of the current-limiting resistance is connected with the low-tension supply；Anti-reverse diode, the anode of the anti-reverse diode and institute
The other end for stating current-limiting resistance is connected；Filter inductance, the negative electrode phase of one end of the filter inductance and the anti-reverse diode
Even, the other end of the filter inductance is connected with the chip input of the LDO；First electrochemical capacitor, the first electrolysis electricity
The positive terminal of appearance is connected with the other end of the filter inductance, the negative pole end connection reference ground of first electrochemical capacitor；First
Electric capacity, first electric capacity is in parallel with first electrochemical capacitor.
According to one embodiment of present invention, the vehicle-mounted CAN power circuit of the electric automobile also includes：Second electrolysis electricity
Hold, the positive terminal of second electrochemical capacitor is connected with the chip output of the LDO, and the output CAN power supplys, described the
The negative pole end connection reference ground of two electrochemical capacitors；Second electric capacity, second electric capacity is in parallel with second electrochemical capacitor.
According to one embodiment of present invention, first control signal can be high level signal, the second control letter
Number can be low level signal.
According to one embodiment of present invention, it is described when the CAN power supply units receive the stopping enable signal
LDO in CAN power supply units is in and closes current output mode.
To reach above-mentioned purpose, a kind of power-supply system of electric automobile that another aspect of the present invention embodiment is proposed, including
The vehicle-mounted CAN power circuit of described electric automobile.
The power-supply system of the electric automobile for proposing according to embodiments of the present invention, by the vehicle-mounted CAN electricity of above-mentioned electric automobile
Source circuit, can reduce the current drain of CAN interface circuit under holding state, it is to avoid vehicle inspection caused by standby current is excessive
Unqualified problem is tested, the qualification rate of inspection is improve.
To reach above-mentioned purpose, a kind of electric automobile that another aspect of the invention embodiment is proposed, including it is described electronic
The power-supply system of automobile.
The electric automobile for proposing according to embodiments of the present invention, by the power-supply system of above-mentioned electric automobile, can reduce and treat
The current drain of CAN interface circuit under machine state, it is to avoid vehicle disqualified upon inspection problem caused by standby current is excessive, improves
The qualification rate of inspection.
Brief description of the drawings
Fig. 1 is the block diagram of the vehicle-mounted CAN power circuit of electric automobile according to embodiments of the present invention；
Fig. 2 is the block diagram of the vehicle-mounted CAN power circuit of electric automobile according to an embodiment of the invention；
Fig. 3 is according to a circuit theory diagrams for the vehicle-mounted CAN power circuit of the electric automobile of specific embodiment of the invention；
Fig. 4 is the block diagram of the power-supply system of electric automobile according to embodiments of the present invention；And
Fig. 5 is the block diagram of electric automobile according to embodiments of the present invention.
Reference：
Enabling unit 10, CAN power supply units 20, high voltage power supply 30 and low-tension supply 40；
Control chip 301；First resistor R1, the first triode Q1, second resistance R2, optocoupler IC1, the first metal-oxide-semiconductor MOS1
With the 5th resistance R5；
Current-limiting resistance Rs, anti-reverse diode D1, filter inductance L1, the first electrochemical capacitor EC1 and the first electric capacity C1；Second
Electrochemical capacitor EC2 and the second electric capacity C2；
The power-supply system 200 and electric automobile 300 of the vehicle-mounted CAN power circuit 100, electric automobile of electric automobile.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
It is exemplary to scheme the embodiment of description, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below with reference to the accompanying drawings come describe the embodiment of the present invention proposition electric automobile vehicle-mounted CAN power circuit, electronic vapour
Car and its power-supply system.
Fig. 1 is the block diagram of the vehicle-mounted CAN power circuit of electric automobile according to embodiments of the present invention.Electric automobile
Electric power system include high voltage power supply 30 and low-tension supply 40, vehicle-mounted CAN power circuit 100 includes：Enabling unit 10 and CAN are supplied
Electric unit 20.
Wherein, CAN power supply units 20 are powered for exporting CAN power supplys Vc with the CAN to electric automobile；Enabling unit
10 output end is connected with the Enable Pin of CAN power supply units 20, and enabling unit 10 is used to receive the control chip of high voltage power supply 30
The control signal of 301 outputs, wherein, when 30 normal power supply of high voltage power supply of electric automobile, the control chip of high voltage power supply 30
301 the first control signals of output are to enabling unit 10 so that enabling unit 10 outputs enable signal to CAN power supply units 20, CAN
Power supply unit 20 is operated；When 30 power down of high voltage power supply of electric automobile, the control chip 301 of high voltage power supply 30 output the
To enabling unit 10 so that the output of enabling unit 10 stops enabling signal to CAN power supply units 20, CAN's two control signals powers list
Unit 20 is stopped.
According to one embodiment of present invention, first control signal can be high level signal, the second control letter
Number can be low level signal.
Specifically, the high voltage power supply 30 (such as 200VDC) of electric automobile is the high-pressure systems such as dynamical system and air-conditioning
The compressor of functional module, such as air-conditioner is powered, and the low-tension supply 40 (such as 12VDC) of electric automobile is amusement and control
The functional module of the low-pressure systems such as system, such as player is powered.When CAN nodes connect CAN power supply Vc, such as during+5V, electricity
Control unit ECU can be communicated with CAN, to receive control instruction, realize corresponding function control, for example, control compressor
Freezed, and uploaded running state information.
More specifically, when electric automobile is in normally travel or idling state, the normal power supply of high voltage power supply 30；
When the fuel power car of electric automobile is in (flame-out) state of shutdown, the power down of high voltage power supply 30.
In 30 normal power supply of high voltage power supply of electric automobile, the output of control chip 301 first of high voltage power supply 30 is controlled
Signal such as high level signal to enabling unit 10, enabling unit 10 enables letter according to the first control signal generation for receiving
Number, and Enable Pin of the signal output to CAN power supply units 20 will be enabled, the current potential of the Enable Pin of CAN power supply units 20 is driven high,
CAN power supply units 20 are that CAN power supply units 20 are processed the voltage that low-tension supply 40 is provided to export into working condition
CAN power supply Vc, wherein, the magnitude of voltage of CAN power supplys Vc can be+5V, now, the output CAN power supplys of CAN power supply units 20 Vc (for example+
5V D/C powers) to be powered with the CAN to electric automobile, CAN can be normally carried out the communication i.e. ECU of electric automobile
ECU can be communicated by CAN interface module with the host computer of electric automobile, to receive control instruction, realize corresponding function
Control, and upload running state information.
In 30 power down of high voltage power supply of electric automobile, the control chip 301 of high voltage power supply 30 exports the second control signal
Such as low level signal to enabling unit 10, enabling unit 10 stops enabling letter according to the second control signal generation for receiving
Number, and will stop enable signal output to CAN power supply units 20 Enable Pin, the current potential quilt of the Enable Pin of CAN power supply units 20
Drag down, the i.e. CAN power supply units 20 that are stopped of CAN power supply units 20 stop being powered to CAN, now, the power supply of CAN
Voltage is 0V, and the ECU ECU that CAN stops being communicated i.e. electric automobile stops being carried out with the host computer of electric automobile
Communication, ECU ECU does not consume electric current.
In an embodiment of the present invention, CAN power supply units 20 stop output CAN power supplys when receiving and stopping enabling signal
Vc, CAN power supply unit 20 closes electric current output, that is, say, CAN is stopped and does not consume electric current, vehicle-mounted CAN power circuit
100 enter ultra-low power standby state, and standby current is smaller, for example, can be less than 500 μ A.
Thus, the vehicle-mounted CAN power circuit of the electric automobile of the embodiment of the present invention can reduce CAN interface under holding state
The current drain of circuit, it is to avoid vehicle disqualified upon inspection problem caused by standby current is excessive, improves the qualification rate of inspection.
According to one embodiment of present invention, as shown in Fig. 2 CAN power supply units 20 include low pressure difference linear voltage regulator LDO
(low dropout regulator)。
Specifically, low pressure difference linear voltage regulator LDO is used to be powered for the CAN of electric automobile, wherein, high voltage power supply
30 are controlled by enabling unit 10 to the working condition of LDO chips.When 30 normal power supply of high voltage power supply, control chip
, to enabling unit 10, enabling unit 10 is according to the first control for receiving for 301 output the first control signal such as high level signals
Signal generation enables signal, and LDO chips enter working condition, i.e. LDO chips after chip Enable Pin CTL receives enable signal
The voltage that low-tension supply 40 is provided is processed and exported CAN power supply Vc, wherein, the magnitude of voltage of CAN power supplys Vc can be+5V,
Now, LDO chips are exported CAN power supplys Vc (such as+5V D/C powers) and are powered with the CAN to electric automobile, and CAN can
The ECU ECU for being normally carried out communicating i.e. electric automobile can be led to by CAN interface module with the host computer of electric automobile
News, to receive control instruction, realize corresponding function control, and upload running state information.When 30 power down of high voltage power supply, control
Coremaking piece 301 exports the second control signal such as low level signal to enabling unit 10, and enabling unit 10 is according to for receiving
The generation of two control signals stops enabling signal, and will stop enabling signal output to LDO chips in chip Enable Pin CTL, LDO core
Piece is received to be stopped stop after stopping enables signal and powered to CAN in chip Enable Pin CTL, now, CAN
Supply voltage be 0V, CAN stop communicated i.e. electric automobile ECU ECU stop it is upper with electric automobile
Machine is communicated, and ECU ECU does not consume electric current.
As described above, the power supply sequential relationship of the vehicle-mounted CAN power circuit of electric automobile is specific as follows：
When 30 normal power supply of high voltage power supply, LDO chip normal works, with the voltage that provides low-tension supply 40
CAN power supply Vc are managed and export, now, LDO chips export CAN power supplys Vc (such as+5V D/C powers) with the CAN to electric automobile
Bus-powered, CAN can be normally carried out communication；When high voltage power supply 30 is stopped power supply, LDO chips are stopped, now,
LDO chips stop being powered to CAN, and CAN stops being communicated.
So, the working condition of LDO chips can be controlled by high voltage power supply 30, under stopped status, high voltage power supply 30 is fallen
Electricity, and control LDO chips to be stopped to stop being powered to CAN, CAN stops being communicated, and is not needed with closing
Circuit, now, in whole communication system only have LDO chips to be in powered close pattern so that, reduce CAN interface circuit
Current loss, now, the overall power consumption current value in circuit can be less than 100 μ A.
The circuit structure and operation principle of the vehicle-mounted CAN power circuit of the embodiment of the present invention are described below with reference to Fig. 3.
According to one embodiment of present invention, as shown in figure 3, enabling unit 10 includes：First resistor R1, the first triode
Q1, second resistance R2, optocoupler IC1, the first metal-oxide-semiconductor MOS1 and the 5th resistance R5, wherein, one end of first resistor R1 and high-tension electricity
The output end of the control chip 301 in source 30 is connected；The base stage of the first triode Q1 is connected with the other end of first resistor R1, and first
The grounded emitter of triode Q1；Second resistance R2 is connected to the base stage of the first triode Q1 and the emitter stage of the first triode Q1
Between；First pin 1 of optocoupler IC1 is connected with default power supply VCC, and second pin 2 of optocoupler IC1 is by 3rd resistor R3 and the
The colelctor electrode of one triode Q1 is connected；The grid of the first metal-oxide-semiconductor MOS1 is connected with the three-prong 3 of optocoupler IC1, the first metal-oxide-semiconductor
The source electrode of MOS1 is connected to chip the Enable Pin CTL, the first metal-oxide-semiconductor MOS1 of LDO after being connected with the 4th pin 4 of optocoupler IC1
Drain electrode be connected with the chip input VDC of LDO by the 4th resistance R4；One end of 5th resistance R5 and the first metal-oxide-semiconductor MOS1
Source electrode be connected, another termination reference ground of the 5th resistance R5.
According to one embodiment of present invention, as shown in figure 3, vehicle-mounted CAN power circuit 100 also includes：Current-limiting resistance Rs,
Anti-reverse diode D1, filter inductance L1, the first electrochemical capacitor EC1 and the first electric capacity C1, wherein, one end of current-limiting resistance Rs with
Low-tension supply 40 is connected；The anode of anti-reverse diode D1 is connected with the other end of current-limiting resistance Rs；One end of filter inductance L1
Negative electrode with anti-reverse diode D1 is connected, and the other end of filter inductance L1 is connected with the chip input VDC of LDO；First electricity
The positive terminal of solution electric capacity EC1+be connected with the other end of filter inductance L1, the negative pole end connection reference ground of the first electrochemical capacitor EC1；
First electric capacity C1 is in parallel with the first electrochemical capacitor EC1.
A specific embodiment of the invention, the first electrochemical capacitor EC1 can be paster electrochemical capacitor, the first electric capacity C1
It can be ceramic disc capacitor.
Specifically, filter inductance L1, the first electrochemical capacitor EC1 and the first electric capacity C1 are used for what low-tension supply 40 was provided
Voltage is filtered treatment, and by the chip input VDC of filtered voltage output to LDO.When the chip Enable Pin of LDO
When CTL receives enable signal, LDO chips enter working condition, and LDO chips enter to the voltage that chip input VDC is received
Row processes to export CAN power supply Vc, and by CAN power supplys Vc for CAN nodes are powered.When the chip Enable Pin CTL of LDO is received
When enabling signal, LDO chips are in powered close pattern, now, electric leakage are produced on the first electrochemical capacitor EC1 and the first electric capacity C1
Stream.
It should be noted that the current value that current-limiting resistance Rs can be used in limit circuit, to prevent electric current excessive to LDO cores
Piece causes to damage.
According to one embodiment of present invention, as shown in figure 3, vehicle-mounted CAN power circuit 100 also includes：Second electrolysis electricity
Hold EC2 and the second electric capacity C2, wherein, the positive terminal of the second electrochemical capacitor EC2+be connected with the chip output VD of LDO, and export
The negative pole end connection reference ground GND of CAN power supplys Vc, the second electrochemical capacitor EC2；Second electric capacity C2 and the second electrochemical capacitor EC2 are simultaneously
Connection.Wherein, the second electrochemical capacitor EC2 and the second electric capacity C2 may make up decoupling circuit, be aligned with the curent change eliminated in circuit
The influence that often work is produced.
Specifically, when 30 normal power supply of high voltage power supply of electric automobile, the control chip 301 of high voltage power supply 30 is exported
First control signal such as high level signal to the first triode Q1 base stage, the first triode Q1 is open-minded, due to optocoupler IC1's
First pin 1 is connected with default power supply VCC, and when 30 normal power supply of high voltage power supply, it can be+5V, so, light to preset power supply VCC
The input unit of coupling IC1 is open-minded, that is, be connected to the LEDs ON between first pin 1 of optocoupler IC1 and the second pin 2,
The output section of optocoupler IC1 is open-minded, three-prong 3 and the 4th pin 4 the output high level of optocoupler IC1.And then, the first metal-oxide-semiconductor
The grid of MOS1 receives high level, and the first metal-oxide-semiconductor MOS1 is open-minded, and the chip Enable Pin CTL of LDO receives high level, LDO
The current potential of chip Enable Pin CTL be driven high, LDO chip normal works, so that LDO is carried out to the voltage that low-tension supply 40 is provided
Process to export CAN power supply Vc, wherein, the magnitude of voltage of CAN power supplys Vc can be+5V, and CAN power supplys Vc is used to be electric automobile
CAN is powered, so that the ECU ECU that CAN can be normally carried out communicating i.e. electric automobile can be by CAN interface module
Host computer with electric automobile is communicated, and to receive control instruction, realizes corresponding function control, and by running state information
Host computer is uploaded to, monitor in real time is carried out with to running status.Now, the LDO chip operations in CAN power supply units 20 are in electric current
Output mode.
According to another embodiment of the invention, when CAN power supply units 20 receive stopping and enable signal, CAN powers list
LDO in unit 20 is in and closes current output mode.
Specifically, after electric automobile parking (flame-out), the power down of high voltage power supply 30, the magnitude of voltage of high voltage power supply 30 is progressively
Zero is reduced to, the control chip 301 of high voltage power supply 30 exports the second control signal such as low level signal to the first triode Q1
Base stage, in the presence of second resistance R2, the base voltage of the first triode Q1 is reliably dragged down, the first triode Q1 close
Disconnected, while the voltage of default power supply VCC is changed into 0V, so, the input unit shut-off of optocoupler IC1 is connected to the first of optocoupler IC1
Light emitting diode cut-off between the pin 2 of pin 1 and second, the output section shut-off of optocoupler IC1, the He of three-prong 3 of optocoupler IC1
4th pin 4 exports low level.And then first the grid voltage of metal-oxide-semiconductor MOS1 be changed into 0V, the first metal-oxide-semiconductor MOS1 shut-offs, and LDO
The chip Enable Pin CTL of chip is reliably dragged down by the 5th resistance R5, and LDO closes current output mode, that is, say, LDO chips stop
Work.Now, LDO chips stop being powered to CAN, and the supply voltage of CAN is 0V, and CAN stops being communicated
That is the ECU ECU of electric automobile stops being communicated with the host computer of electric automobile, and ECU ECU does not consume electric current.
In one particular embodiment of the present invention, after high voltage power supply 30 is stopped power supply, LDC is electrically turn off mould in band
There is quiescent current in formula, LDC chip internals, the maximum current value of quiescent current can be 5uA.Also, the first of enabling unit 10
Leakage current is produced on electrochemical capacitor EC1 and the first electric capacity C1, wherein, the current value of the leakage current of the first electrochemical capacitor EC1 can be
3uA, the current value of the leakage current of the first electric capacity C1 is less than 1uA.So, the electric current of the consumption electric current of vehicle-mounted CAN power circuit 100
Value maximum can be 5+3+1=9uA, that is to say, that the consumption electric current of vehicle-mounted CAN power circuit 100 is no more than 10uA, far below car
Standby current higher limit specified in the technical requirements of factory (such as 700 μ A).
Thus, stop being powered for the CAN of electric automobile when fuel power car is under stopped status, CAN
Stopping is communicated, to close unwanted circuit such that it is able to reduce the current drain of CAN interface circuit under holding state.
To sum up, the vehicle-mounted CAN power circuit of the electric automobile for proposing according to embodiments of the present invention, in the high pressure of electric automobile
During power supply normal power supply, the control chip of high voltage power supply exports the first control signal to enabling unit so that enabling unit output makes
To CAN power supply units, CAN power supply units are operated energy signal when receiving and enabling signal, in the high-tension electricity of electric automobile
During the power down of source, the control chip of high voltage power supply exports the second control signal to enabling unit so that enabling unit output stops enabling
Signal to CAN power supply units, CAN power supply units is stopped when receiving and enabling signal such that it is able to reduce holding state
The current drain of lower CAN interface circuit, it is to avoid vehicle disqualified upon inspection problem caused by standby current is excessive, improves inspection
Qualification rate.
Fig. 4 is the block diagram of the power-supply system of electric automobile according to embodiments of the present invention.As shown in figure 4, the electricity
The power-supply system 200 of electrical automobile includes the vehicle-mounted CAN power circuit 100 of electric automobile.
To sum up, the power-supply system of the electric automobile for proposing according to embodiments of the present invention, by the vehicle-mounted of above-mentioned electric automobile
CAN power circuits, can reduce the current drain of CAN interface circuit under holding state, it is to avoid caused by standby current is excessive
Vehicle disqualified upon inspection problem, improves the qualification rate of inspection.
Fig. 5 is the block diagram of electric automobile according to embodiments of the present invention.As shown in figure 5, the electric automobile 300 is wrapped
Include the power-supply system 200 of electric automobile.
To sum up, the electric automobile for proposing according to embodiments of the present invention, by the power-supply system of above-mentioned electric automobile, can drop
The current drain of CAN interface circuit under low holding state, it is to avoid vehicle disqualified upon inspection problem caused by standby current is excessive,
Improve the qualification rate of inspection.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description, must rather than the device or element for indicating or imply meaning
With specific orientation, with specific azimuth configuration and operation, therefore must be not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In the description of the invention, " multiple " is meant that at least two, such as two, three
It is individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be that machinery connects
Connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or two interaction relationships of element, unless otherwise clearly restriction.For one of ordinary skill in the art
For, can as the case may be understand above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be with
It is the first and second feature directly contacts, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be with office
Combined in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
Art personnel can be tied the feature of the different embodiments or example described in this specification and different embodiments or example
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (9)
1. the vehicle-mounted CAN power circuit of a kind of electric automobile, it is characterised in that the electric power system of the electric automobile includes high pressure
Power supply and low-tension supply, the vehicle-mounted CAN power circuit include：
CAN power supply units, the CAN power supply units are powered for exporting CAN power supplys with the CAN to the electric automobile；
Enabling unit, the output end of the enabling unit is connected with the Enable Pin of the CAN power supply units, and the enabling unit is used
In the control signal of the control chip output for receiving the high voltage power supply, wherein,
When the high voltage power supply normal power supply of the electric automobile, the control chip of the high voltage power supply exports the first control signal
To the enabling unit so that the enabling unit outputs enable signal to the CAN power supply units, the CAN power supply units enter
Row work；
When the high voltage power supply power down of the electric automobile, the control chip of the high voltage power supply exports the second control signal to institute
State enabling unit so that the enabling unit output stop enable signal to the CAN power supply units, the CAN power supply units stop
Only work.
2. the vehicle-mounted CAN power circuit of electric automobile according to claim 1, it is characterised in that the CAN power supply units
Including low pressure difference linear voltage regulator LDO.
3. the vehicle-mounted CAN power circuit of electric automobile according to claim 2, it is characterised in that the enabling unit bag
Include：
First resistor, one end of the first resistor is connected with the output end of the control chip of the high voltage power supply；
First triode, the base stage of first triode is connected with the other end of the first resistor, first triode
Grounded emitter；
Second resistance, the second resistance be connected to the base stage of first triode and first triode emitter stage it
Between；
Optocoupler, the first pin of the optocoupler is connected with default power supply, and the second pin of the optocoupler passes through 3rd resistor and institute
The colelctor electrode for stating the first triode is connected；
First metal-oxide-semiconductor, the grid of first metal-oxide-semiconductor is connected with the three-prong of the optocoupler, the source electrode of first metal-oxide-semiconductor
The chip Enable Pin of the LDO is connected to after being connected with the 4th pin of the optocoupler, the drain electrode of first metal-oxide-semiconductor passes through
4th resistance is connected with the chip input of the LDO；
5th resistance, one end of the 5th resistance is connected with the source electrode of first metal-oxide-semiconductor, the other end of the 5th resistance
Connect reference ground.
4. the vehicle-mounted CAN power circuit of electric automobile according to claim 3, it is characterised in that also include：
Current-limiting resistance, one end of the current-limiting resistance is connected with the low-tension supply；
Anti-reverse diode, the anode of the anti-reverse diode is connected with the other end of the current-limiting resistance；
Filter inductance, one end of the filter inductance is connected with the negative electrode of the anti-reverse diode, the filter inductance it is another
One end is connected with the chip input of the LDO；
First electrochemical capacitor, the positive terminal of first electrochemical capacitor is connected with the other end of the filter inductance, and described first
The negative pole end connection reference ground of electrochemical capacitor；
First electric capacity, first electric capacity is in parallel with first electrochemical capacitor.
5. the vehicle-mounted CAN power circuit of electric automobile according to claim 4, it is characterised in that also include：
Second electrochemical capacitor, the positive terminal of second electrochemical capacitor is connected with the chip output of the LDO, and output is described
CAN power supplys, the negative pole end connection reference ground of second electrochemical capacitor；
Second electric capacity, second electric capacity is in parallel with second electrochemical capacitor.
6. the vehicle-mounted CAN power circuit of the electric automobile according to any one of claim 1-5, it is characterised in that described
First control signal is high level signal, and second control signal is low level signal.
7. the vehicle-mounted CAN power circuit of electric automobile according to claim 6, it is characterised in that the CAN power supply units
When receiving the stopping enable signal, the LDO in the CAN power supply units is in and closes current output mode.
8. a kind of power-supply system of electric automobile, it is characterised in that including electronic according to any one of claim 1-7
The vehicle-mounted CAN power circuit of automobile.
9. a kind of electric automobile, it is characterised in that the power-supply system including electric automobile according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611255839.5A CN106740133B (en) | 2016-12-30 | 2016-12-30 | Vehicle-mounted CAN power circuit, electric car and its power-supply system of electric car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611255839.5A CN106740133B (en) | 2016-12-30 | 2016-12-30 | Vehicle-mounted CAN power circuit, electric car and its power-supply system of electric car |
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| CN106740133A true CN106740133A (en) | 2017-05-31 |
| CN106740133B CN106740133B (en) | 2018-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611255839.5A Active CN106740133B (en) | 2016-12-30 | 2016-12-30 | Vehicle-mounted CAN power circuit, electric car and its power-supply system of electric car |
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| CN109039662A (en) * | 2018-07-16 | 2018-12-18 | 苏州艾普乐思新能源动力系统科技有限公司 | A kind of electric automobile whole consumption control method |
| CN109714237A (en) * | 2019-03-08 | 2019-05-03 | 东莞博力威电池有限公司 | A kind of communication wake-up circuit of CAN bus chip |
| CN109873739A (en) * | 2019-03-14 | 2019-06-11 | 重庆长安新能源汽车科技有限公司 | A kind of new-energy automobile and its security mechanism actively test circuit |
| CN111966203A (en) * | 2020-08-18 | 2020-11-20 | 浪潮商用机器有限公司 | Server and chip power supply device thereof |
| CN114967560A (en) * | 2022-06-06 | 2022-08-30 | 嘉兴技领信息技术有限公司 | Communication interface circuit with low power consumption control |
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| CN109039662A (en) * | 2018-07-16 | 2018-12-18 | 苏州艾普乐思新能源动力系统科技有限公司 | A kind of electric automobile whole consumption control method |
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| CN111966203A (en) * | 2020-08-18 | 2020-11-20 | 浪潮商用机器有限公司 | Server and chip power supply device thereof |
| CN111966203B (en) * | 2020-08-18 | 2023-12-26 | 浪潮商用机器有限公司 | Server and chip power supply device thereof |
| CN114967560A (en) * | 2022-06-06 | 2022-08-30 | 嘉兴技领信息技术有限公司 | Communication interface circuit with low power consumption control |
| CN114967560B (en) * | 2022-06-06 | 2023-11-07 | 嘉兴技领信息技术有限公司 | Communication interface circuit with low power consumption control |
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| CN106740133B (en) | 2018-12-04 |
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