CN106114425B - A kind of mild hybrid electric vehicle method for controlling power supply - Google Patents
A kind of mild hybrid electric vehicle method for controlling power supply Download PDFInfo
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- CN106114425B CN106114425B CN201610795164.7A CN201610795164A CN106114425B CN 106114425 B CN106114425 B CN 106114425B CN 201610795164 A CN201610795164 A CN 201610795164A CN 106114425 B CN106114425 B CN 106114425B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
-
- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The present invention relates to hybrid vehicle control field, more particularly to a kind of mild hybrid electric vehicle method for controlling power supply, this method includes：In ignition lock ON gear switch after the power is turned on, initialized；After initialization, detect whether to meet power-up conditions；If it is, obtaining upper electrical parameter, and powered on according to the upper electrical parameter；In power up, detect whether to meet lower electric condition in real time；If so, perform lower electric current journey.By the present invention, the dynamic property and comfort of vehicle launch are improved.
Description
Technical field
The present invention relates to hybrid vehicle control field, more particularly to a kind of mild hybrid electric vehicle power supply control side
Method.
Background technology
Automobile hybrid power technology has the function of Brake energy recovery, accelerates power-assisted and adjusts engine load etc., can drop
Low complete-vehicle oil consumption and discharge, thus it is subject to government and Automobile Enterprises to widely popularize.Automobile hybrid power technology includes：Slight mixing
Power technology and severe hybrid power technology, wherein light hybrid technology not only energy-saving and emission-reduction but also had not reduced course continuation mileage, and
Cost increase is less, becomes Automobile Enterprises and takes into account one of preferred solution of discharge, oil consumption and driving.Specifically, it is slight mixed
Power automobile power system is closed as shown in Figure 1, the system includes：Engine, hybrid dynamic system controller EMS, power generation driving one
Motor BSG, dc voltage changer DCDC, normal power supplies, hybrid power power supply (referred to as mixed dynamic power supply) and each equipment of connection
Cable, which includes：Communication Control network cable, normal grid cable, mixed dynamic power grid cables；Further, dynamic power supply is mixed
Including：Battery controller, battery pack and the relay controlled by battery controller, the relay and the battery pack string
Connection, for controlling whether battery pack outwards exports electric energy, battery controller measurement battery pack voltage and mixed dynamic power output end electricity
Pressure, and calculate both voltage differences and determine whether closing relay；Hybrid dynamic system controller EMS passes through the Communication Control shown in Fig. 1
Network realizes the communication with dc voltage changer DCDC, power generation driving motor integrating BSG and mixed dynamic power supply respectively, generally
Ground, communication control net can be CAN bus networks；Hybrid dynamic system controller EMS can obtain igniting lock status in real time, and lead to
CAN bus is crossed to communicate with mixed dynamic power supply, dc voltage changer DCDC and power generation driving motor integrating BSG respectively；Hair
Temperature sensor is typically arranged with motivation, for detecting engine temperature in real time.
Start mild hybrid power system to be quick, and avoid two sets of different voltages horizontal (i.e. normal grid is with mixing in Fig. 1
The different voltages that dynamic power grid is formed) electrical equipment occur phenomena such as overcurrent, overvoltage in connection and damage electrical equipment, it is necessary to right
Hybrid power system carries out power-on and power-off management control, and still, the mild hybrid electric vehicle of ordinary hybrid automobile moves at present
Force system (abbreviation hybrid dynamic system) is wanting in consideration normal power supplies voltage and engine operating state when powering on, and is regularly opened in igniting
Close after opening or performed after engine start and power on action.
When specifically, using the above scheme, have the following disadvantages：
1. hybrid dynamic system is regularly carried out before engine start after ignition switch opening to power on, when normal power supplies electricity compared with
It is unexpected because of maintenance voltage deficiency to disengage after easily causing the relay closure in mixed dynamic power supply when low, so that hybrid dynamic system needs
To perform again and power on action.
2. regularly carrying out hybrid dynamic system after the engine started to power on, hybrid dynamic system startup hysteresis is may result in, and
And engine is started using traditional approach, the dynamic property of vehicle, driving and discharge are poor.
3. dc voltage changer DCDC stops boost action after preliminary filling boosting reaches target voltage, since relay closes
Conjunction has certain delay, when dc voltage changer DCDC output end voltages start to fall after rise, two when may cause the relay to close
Terminal voltage difference exceedes normal requirement scope, so as to easily lead to the failures such as relay sparking, ablation.
The content of the invention
The present invention provides a kind of mild hybrid electric vehicle method for controlling power supply, with improve the dynamic property of vehicle launch with
Comfort, and improve hybrid vehicle and start discharge.
A kind of mild hybrid electric vehicle method for controlling power supply, the described method includes：
In ignition lock ON gear switch after the power is turned on, initialized；
After initialization, detect whether to meet power-up conditions；
If it is, obtaining upper electrical parameter, and powered on according to the upper electrical parameter；
In power up, detect whether to meet lower electric condition in real time；
If it is, perform lower electric current journey.
Preferably, the method further includes：
First timer is set；
After initialization, first timer starts timing；
The power-up conditions are：The first timer present timing value is less than ON grades of the first setting time and ignition lock
The not lower electricity of switch.
Preferably, the upper electrical parameter includes：Engine temperature value, normal power supplies magnitude of voltage and engine speed value；
It is described according to the upper electrical parameter power on including：
Determine whether engine is according to the engine speed value, engine temperature value and normal power supplies magnitude of voltage
Whether operating status or current three-dimensional arteries and veins spectrum true-false value are true；
If it is satisfied, then removing first timer, and perform and power on flow；
The three-dimensional arteries and veins spectrum true-false value is to demarcate to obtain with engine temperature value by the normal power supplies magnitude of voltage, to determine
Whether routine supply voltage minimum is less than voltage threshold when starting engine；When three-dimensional arteries and veins spectrum true-false value is true, represent to open
Routine supply voltage minimum is more than voltage threshold during dynamic engine；Voltage threshold maintains closure for mixed dynamic power supply repeat circuit
Minimum voltage value.
Preferably, the flow that powers on includes：
Confirm whether mixed dynamic power supply has waken up with dc voltage changer by CAN bus；
If so, calculating preliminary filling boost target value, and the preliminary filling boosting target is sent to the dc voltage changer
Value；
Closing relay is sent by CAN bus to battery controller to instruct；
It is confirmed whether to receive the closing relay information that battery controller is sent；
If so, power generation driving motor integrating is waken up by CAN bus.
Preferably, the flow that powers on further includes：
After battery controller receives closing relay instruction, confirm whether mixed dynamic supply voltage meets differential pressure requirements；
If so, control relay closure, and send closing relay information.
Preferably, the flow that powers on further includes：
Second timer is set；
After sending closing relay instruction to battery controller by CAN bus, second timer starts timing；
After second counter reaches the second setting time, if not receiving the closure of battery controller transmission
Relay instructs, then removes second timer, recalculates preliminary filling boost target value, and to the dc voltage changer
Send the preliminary filling boost target value.
Preferably, the preliminary filling boost target value is equal to mixed dynamic the sum of supply voltage and voltage drop；Wherein, the voltage
Pressure drop is determined by dc voltage changer internal capacitance and the mixed dynamic power grid opering characteristic of electric apparatus, mixed dynamic power supply relay characteristic.
Preferably, the lower electric condition is：Electricity or hybrid dynamic system have lower electricity request under ignition lock ON gear switch.
Preferably, the lower electric current journey includes：
Lower electricity request is exported to power generation driving motor integrating by CAN bus；
After the 3rd setting time, exported by CAN bus to battery controller and disconnect relay request；
If after the 4th setting time, the relay for receiving battery controller feedback disconnects successful information, then confirms
Lower electricity is completed.
Preferably, the method further includes：
After battery controller receives the disconnection relay request of hybrid dynamic system controller transmission, control relay disconnects,
And disconnect successful information to the hybrid dynamic system controller feddback relay device.
The beneficial effects of the present invention are：
Mild hybrid electric vehicle method for controlling power supply provided in an embodiment of the present invention, ignition lock ON gear switch after the power is turned on,
In the case where meeting power-up conditions, determine to power on opportunity according to upper electrical parameter, so as to ensure hybrid dynamic system safety and stability
Under the premise of start hybrid dynamic system as early as possible, the present invention improves the dynamic property and comfort of vehicle launch, and improves startup discharge.
Brief description of the drawings
Fig. 1 is a kind of structure chart of mild hybrid electric vehicle dynamical system in the prior art.
Fig. 2 is a kind of flow chart of mild hybrid electric vehicle method for controlling power supply of the embodiment of the present invention.
Fig. 3 is a kind of flow chart that flow is powered in the embodiment of the present invention.
Fig. 4 is another flow chart that flow is powered in the embodiment of the present invention.
Fig. 5 is a kind of flow chart of lower electric current journey in the embodiment of the present invention.
Marked in attached drawing：
EMS, hybrid dynamic system controller BSG, power generation driving motor integrating DCDC, dc voltage changer
Embodiment
In order to enable those skilled in the art to be further understood that the feature and technology contents of the present invention, below in conjunction with the accompanying drawings
Elaborate with embodiment to the embodiment of the present invention.
If Fig. 2 is a kind of flow chart of mild hybrid electric vehicle method for controlling power supply of the embodiment of the present invention, the flow chart
Specifically include following steps：
Step 101：Start.
Step 102：Confirm whether ignition lock ON gear switch powers on；If so, perform step 103；Otherwise, return and perform step
Rapid 102.
It should be noted that mild hybrid electric vehicle of embodiment of the present invention method for controlling power supply is mainly by hybrid dynamic system
Controller realizes active control.Further, perform power on in lower electric current journey, it is necessary to hybrid dynamic system controller and other mixed dynamic electricity
Net electric appliance, such as, battery controller, dc voltage changer, power generation driving motor integrating realize information by CAN bus communication
Interaction.
It should be noted that in the embodiment of the present invention, mild hybrid electric vehicle system includes as shown in Figure 1：Mixed dynamic electricity
The cable of net electric appliance and each electric appliance of connection；Mixed dynamic power grid electric appliance includes：Engine, hybrid dynamic system controller EMS, power generation driving
Motor integrating BSG, dc voltage changer DCDC, normal power supplies, hybrid power power supply (referred to as mixed dynamic power supply).
Further, in the embodiment of the present invention, normal power supplies can be the storage battery of 12V-24V.
In the embodiment of the present invention, battery pack can be the battery of 48V-120V in mixed dynamic power supply, mix the electricity of dynamic power source internal
Pool controller carries out information exchange with hybrid dynamic system controller EMS, sends the information such as battery status and relay status, receives electricity
Pond wakes up, dormancy and relay close the information such as disconnection.Battery controller measurement is mixed to be moved power source internal battery pack voltage and mixes dynamic
Power output end voltage, and calculate both voltage differences and determine whether closing relay.Mixed dynamic power supply repeat circuit is in mixed dynamic power supply
Between internal cell bag cathode and mixed dynamic power output end cathode, relay closure could externally carry out electric energy interaction.Relay
And battery controller is powered by normal power supplies.
Dc voltage changer DCDC：Have the function of high pressure (such as 48V) being converted into low pressure (such as 12V)；Also have
It is high pressure (such as 48V) to have the boosting of low pressure (such as 12V) preliminary filling.Output end voltage is maintained by its internal capacitance after preliminary filling,
Voltage pre-charge slowly declines again after reaching desired value.DCDC controllers receive hybrid dynamic system controller EMS instructions according to target electricity
Pressure carries out preliminary filling boosting.
Step 103：Initialized.
It should be noted that initialized mainly hybrid dynamic system controller initialization.Further, the embodiment of the present invention
In initialization, the first timer can be set；And after initialization, the first timer starts timing.
Step 104：Detect whether to meet power-up conditions；If so, perform step 105；Otherwise, step 109 is performed.
The power-up conditions are：The first timer present timing value is less than ON grades of the first setting time and ignition lock
The lower electricity of switch.
Specifically, the first setting time is determined by hybrid dynamic system controller performance, such as, the first setting value is 1s.
Step 105：Electrical parameter in acquisition, performs step 106.
Specifically, upper electrical parameter includes：Engine temperature value, normal power supplies magnitude of voltage and engine speed value.Need
Illustrate, engine temperature value can be calculated by placing temperature sensor collection on the engine, engine speed value
It can be calculated by the speed probe collection placed on the engine；Normal power supplies magnitude of voltage is by hybrid dynamic system controller
Collected in real time at normal power supplies.
Step 106：Powered on according to the upper electrical parameter.
It is described according to the upper electrical parameter power on including：
Determine whether engine is according to the engine speed value, engine temperature value and normal power supplies magnitude of voltage
Whether operating status or current three-dimensional arteries and veins spectrum true-false value are true；If it is satisfied, then removing first timer, and perform
Electric current journey.Specifically, the flow that powers in the embodiment of the present invention is described in detail below in conjunction with Fig. 3.
Specifically, confirm whether engine is in operating status according to engine speed value；According to the engine temperature
Value determines three-dimensional arteries and veins spectrum true-false value with the normal power supplies magnitude of voltage.Specifically, the three-dimensional arteries and veins spectrum true-false value is by described normal
Whether rule supply voltage value is demarcated to obtain with engine temperature value, small with routine supply voltage minimum during definite startup engine
In voltage threshold；When three-dimensional arteries and veins spectrum true-false value is true, routine supply voltage minimum is more than voltage when representing to start engine
Threshold value；When three-dimensional arteries and veins spectrum true-false value is fictitious time, routine supply voltage minimum is less than voltage threshold when representing to start engine.
Further, in the embodiment of the present invention, on startup, the voltage of normal power supplies can decline engine, and normal power supplies
Voltage specifically drop to it is much related with normal power supplies initial voltage and engine temperature, therefore, according to normal power supplies voltage
Value can demarcate to obtain three-dimensional pulse true-false value, the true and false table of the corresponding three-dimensional pulse of three-dimensional arteries and veins spectrum true-false value with engine temperature value
As shown in table 1.It should be noted that in the embodiment of the present invention, true-false value purpose is composed using the three-dimensional arteries and veins of the true and false table of three-dimensional pulse
Routine supply voltage minimum is not less than voltage threshold U1 during to ensure conventional startup engine, so as to avoid engine start
When, mix the disengagement of dynamic power supply repeat circuit；Voltage threshold U1 is equal to the minimum input that mixed dynamic power supply relay maintains closure state
Magnitude of voltage is with ensureing that relay maintains the sum of voltage margin of closure, and further, voltage threshold U1 is also relay in mixed dynamic power supply
Device maintains the minimum voltage value of closure, and the characteristic such as the coil turn of voltage threshold U1 and relay, spring force is related, such as voltage
Threshold value U1 is 7V.
Table 1
Step 107：Detect whether to meet lower electric condition in real time；If so, perform step 108；Otherwise, return and perform step
107。
Specifically, in the embodiment of the present invention, lower electricity condition is：Electricity or hybrid dynamic system have lower electricity please under ignition lock ON gear switch
Ask.If electric under ignition lock ON gear switch, lower electric current journey is performed；Alternatively, if hybrid dynamic system has lower electricity request, under performing
Electric current journey.It should be noted that in the embodiment of the present invention, hybrid dynamic system has the lower electricity request to be mainly：Hybrid dynamic system controller is examined
Measure hybrid dynamic system failure or hybrid dynamic system controller detects engine hang-up.
Step 108：Perform lower electric current journey.
Specifically, the lower electric current journey in the embodiment of the present invention is described in detail below in conjunction with Fig. 5.
Step 109：Terminate.
Mild hybrid electric vehicle method for controlling power supply provided in an embodiment of the present invention, ignition lock ON gear switch after the power is turned on,
In the case where meeting power-up conditions, determine to power on opportunity according to upper electrical parameter, so as to ensure hybrid dynamic system safety and stability
Under the premise of start hybrid dynamic system as early as possible, the present invention improves the dynamic property and comfort of vehicle launch, and improves startup discharge.
Specifically, flow is powered in the embodiment of the present invention specifically to may comprise steps of as shown in Figure 3：
Step 201：Start.
Step 202：Confirm whether mixed dynamic power supply has waken up with dc voltage changer by CAN bus；If so, perform
Step 203；Otherwise, return and perform step 202.
Step 203：Preliminary filling boost target value is calculated, and the preliminary filling boosting target is sent to the dc voltage changer
Value.
Specifically, the preliminary filling boost target value is equal to mixed dynamic the sum of supply voltage and voltage drop, wherein, the voltage
Pressure drop is determined by dc voltage changer internal capacitance and the mixed dynamic power grid opering characteristic of electric apparatus.Further, in the embodiment of the present invention, mainly
It is that relay in voltage decreasing rate and mixed dynamic power supply is obtained by internal capacitance after boosting according to dc voltage changer DCDC preliminary fillings
Device closure time delay calculates voltage drop value, and supply voltage and exterior mixed dynamic power grid are mixed when being closed to ensure that relay is actual
Voltage difference is in claimed range, so as to protect DC power converter and mixed dynamic power supply.Further, the closure delay of relay
Time is mainly related with normal power supplies voltage, relay control logic.
Step 204：Closing relay is sent by CAN bus to battery controller to instruct.
It should be noted that after battery controller receives closing relay instruction, first confirm that mixed dynamic supply voltage is
It is no to meet differential pressure requirements, if meeting differential pressure requirements, battery controller control relay closure, and to hybrid dynamic system controller
Send closing relay information.
Further, in the embodiment of the present invention, battery controller confirms whether mixed dynamic supply voltage meets differential pressure requirements, mainly
It is to confirm that mixed dynamic power supply terminal voltage and the difference of battery pack voltage are being required within range of voltage values, if the pressure difference that difference is excessive
Damage electrical equipment.Specifically, it is desirable to which range of voltage values can be ± 2V.
Step 205：It is confirmed whether to receive the closing relay information that battery controller is sent；If so, perform step
Rapid 206；Otherwise, return to step 203.
Step 206：Power generation driving motor integrating is waken up by CAN bus.
Step 207：Terminate.
Further, in inventive embodiments, if hybrid dynamic system controller does not receive having closed for battery controller always
Relay information is closed, then needs further to limit receiving time, so that hybrid dynamic system controller obtains battery control
The information of device is more efficient.Specifically, as shown in figure 4, being another flow that flow is powered in the embodiment of the present invention, specific bag
Include following steps：
Step 301：Second timer is set.
Step 302：Confirm whether mixed dynamic power supply has waken up with dc voltage changer by CAN bus；If so, perform
Step 303；Otherwise, return and perform step 302.
Step 303：Preliminary filling boost target value is calculated, and the preliminary filling boosting target is sent to the dc voltage changer
Value.
Step 304：Closing relay is sent by CAN bus to battery controller to instruct.
It should be noted that after battery controller receives closing relay instruction, first confirm that mixed dynamic supply voltage is
It is no to meet differential pressure requirements, if meeting differential pressure requirements, battery controller control relay closure, and to hybrid dynamic system controller
Send closing relay information.
Further, in the embodiment of the present invention, battery controller confirms whether mixed dynamic supply voltage meets differential pressure requirements, mainly
It is to confirm that mixed dynamic power supply terminal voltage and the difference of battery pack voltage are being required within range of voltage values, if the pressure difference that difference is excessive
Damage electrical equipment.Specifically, it is desirable to which range of voltage values can be ± 2V.
Step 305：Second timer starts timing.
Step 306：After the second timer reaches the second setting time, it is confirmed whether to receive battery controller transmission
Closing relay information；If so, perform step 307；Otherwise, step 309 is performed.
Specifically, the second setting time can be determined according to the performance of hybrid dynamic system, such as, the second setting value is 2s.
Step 307：Power generation driving motor integrating is waken up by CAN bus.
Step 308：Terminate.
Step 309：Remove the second timer, and return to step 303.
The embodiment of the present invention powers on flow, is accurately calculated according to dc voltage changer and mixed dynamic power supply relay characteristic
Preliminary filling boost target value, it is ensured that relay is quick, the closure of safety, the parts such as protection direct current converter and mixed dynamic power supply.Nothing
Need extra booster circuit frequently to boost the mixed dynamic power supply relay both end voltage difference of maintenance in target zone, do not increase cost and
Circuit is born, and effectively improves the service life of the mixed dynamic electric component such as power supply relay and battery pack, dc voltage changer.
Specifically, lower electric current journey specifically may comprise steps of as shown in Figure 5 in the embodiment of the present invention：
Step 401：Under establish by cable the beginning, perform step 402.
Step 402：Lower electricity request is exported to power generation driving motor integrating by CAN bus.
Step 403：After the 3rd setting time, exported by CAN bus to battery controller and disconnect relay request.
It should be noted that after battery controller receives the disconnection relay request of hybrid dynamic system controller transmission, control
Relay processed disconnects, and disconnects successful information to the hybrid dynamic system controller feddback relay device.
Specifically, the 3rd setting time is determined by the characteristic of power generation driving motor integrating in mixed dynamic power grid electric appliance, further,
Hybrid dynamic system controller determines the 3rd setting time according to the time size of power generation driving motor integrating storage data, such as the
Three setting times are 2s.
Step 404：After 4th setting time, detect whether that the relay for receiving battery controller feedback disconnects and successfully believe
Breath；If so, perform step 405；Otherwise, return and perform step 404.
Specifically, the 4th setting time is determined by the characteristic of battery controller in mixed dynamic power grid electric appliance, further, mixes dynamic system
Controller of uniting stores the time size of data according to battery controller, determines that the 4th setting time, such as the 4th setting time are
2s。
Step 405：Lower electricity is completed.
In conclusion mild hybrid electric vehicle method for controlling power supply provided in an embodiment of the present invention, according to DC voltage
Converter and mixed dynamic power supply relay characteristic accurately calculate preliminary filling boost target value, it is ensured that relay is quick, the closure of safety, protects
Protect the parts such as direct current converter and mixed dynamic power supply.Frequently boosting without extra booster circuit, maintenance is mixed to move power supply relay two
Terminal voltage difference does not increase cost and circuit burden in target zone, effectively improves mixed dynamic power supply relay and battery pack, direct current
The service life of the electric components such as electric pressure converter.
The embodiment of the present invention is described in detail above, embodiment used herein carries out the present invention
Illustrate, the explanation of above example is only intended to help to understand the system and method for the present invention；Meanwhile for the one of this area
As technical staff, according to the thought of the present invention, there will be changes in specific embodiments and applications, to sum up institute
State, this specification content should not be construed as limiting the invention.
Claims (8)
- A kind of 1. mild hybrid electric vehicle method for controlling power supply, it is characterised in that the described method includes：In ignition lock ON gear switch after the power is turned on, initialized；After initialization, detect whether to meet power-up conditions；If it is, obtaining upper electrical parameter, and powered on according to the upper electrical parameter；In power up, detect whether to meet lower electric condition in real time；If it is, perform lower electric current journey；The method further includes：First timer is set；After initialization, first timer starts timing；The power-up conditions are：The first timer present timing value is less than the first setting time and ignition lock ON gear switch Not lower electricity；The upper electrical parameter includes：Engine temperature value, normal power supplies magnitude of voltage and engine speed value；It is described according to the upper electrical parameter power on including：Determine engine whether in operation according to the engine speed value, engine temperature value and normal power supplies magnitude of voltage Whether state or current three-dimensional arteries and veins spectrum true-false value are true；If it is satisfied, then removing first timer, and perform and power on flow；The three-dimensional arteries and veins spectrum true-false value is to demarcate to obtain with engine temperature value by the normal power supplies magnitude of voltage, to determine to start Whether routine supply voltage minimum is less than voltage threshold during engine；When three-dimensional arteries and veins spectrum true-false value is true, represent to start hair Routine supply voltage minimum is more than voltage threshold during motivation；Voltage threshold maintains the minimum of closure for mixed dynamic power supply repeat circuit Magnitude of voltage.
- 2. mild hybrid electric vehicle method for controlling power supply according to claim 1, it is characterised in that described to power on flow Including：Confirm whether mixed dynamic power supply has waken up with dc voltage changer by CAN bus；If so, calculating preliminary filling boost target value, and the preliminary filling boost target value is sent to the dc voltage changer；Closing relay is sent by CAN bus to battery controller to instruct；It is confirmed whether to receive the closing relay information that battery controller is sent；If so, power generation driving motor integrating is waken up by CAN bus.
- 3. mild hybrid electric vehicle method for controlling power supply according to claim 2, it is characterised in that described to power on flow Further include：After battery controller receives closing relay instruction, confirm whether mixed dynamic supply voltage meets differential pressure requirements；If so, control relay closure, and send closing relay information.
- 4. mild hybrid electric vehicle method for controlling power supply according to claim 3, it is characterised in that described to power on flow Further include：Second timer is set；After sending closing relay instruction to battery controller by CAN bus, second timer starts timing；After second counter reaches the second setting time, if not receiving the closing relay of battery controller transmission Device instructs, then removes second timer, recalculates preliminary filling boost target value, and send to the dc voltage changer The preliminary filling boost target value.
- 5. mild hybrid electric vehicle method for controlling power supply according to claim 4, it is characterised in that the preliminary filling boosting Desired value is equal to mixed dynamic the sum of supply voltage and voltage drop；Wherein, the voltage drop is by electricity inside dc voltage changer Hold and the mixed dynamic power grid opering characteristic of electric apparatus, mixed dynamic power supply relay characteristic determine.
- 6. mild hybrid electric vehicle method for controlling power supply according to claim 1, it is characterised in that the lower electric condition For：Electricity or hybrid dynamic system have lower electricity request under ignition lock ON gear switch.
- 7. mild hybrid electric vehicle method for controlling power supply according to claim 6, it is characterised in that the lower electric current journey Including：Lower electricity request is exported to power generation driving motor integrating by CAN bus；After the 3rd setting time, exported by CAN bus to battery controller and disconnect relay request；If after the 4th setting time, the relay for receiving battery controller feedback disconnects successful information, then confirms lower electricity Complete.
- 8. mild hybrid electric vehicle method for controlling power supply according to claim 7, it is characterised in that the method is also wrapped Include：After battery controller receives the disconnection relay request of hybrid dynamic system controller transmission, control relay disconnects, and to The hybrid dynamic system controller feddback relay device disconnects successful information.
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| CN107562037B (en) * | 2017-08-25 | 2020-04-24 | 北京新能源汽车股份有限公司 | Vehicle power-on and power-off control method and device |
| CN108614464A (en) * | 2018-07-18 | 2018-10-02 | 上海科世达-华阳汽车电器有限公司 | A kind of temperature protecting method, device, system and the automobile of automotive rear-view mirror motor |
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