CN110077278A - A kind of electric discharge management method and system of plug-in hybrid electric vehicle - Google Patents

A kind of electric discharge management method and system of plug-in hybrid electric vehicle Download PDF

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Publication number
CN110077278A
CN110077278A CN201910362631.0A CN201910362631A CN110077278A CN 110077278 A CN110077278 A CN 110077278A CN 201910362631 A CN201910362631 A CN 201910362631A CN 110077278 A CN110077278 A CN 110077278A
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power
discharge
electric
battery
air
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CN110077278B (en
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陈文明
牛珍吉
尹兴起
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Zhejiang Geely Holding Group Co Ltd
Geely Automobile Research Institute Ningbo Co Ltd
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Zhejiang Geely Holding Group Co Ltd
Geely Automobile Research Institute Ningbo Co Ltd
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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
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • 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
    • 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
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The present invention provides a kind of electric discharges of plug-in hybrid electric vehicle to manage method and system, belongs to plug-in hybrid electric vehicle technical field.It solves the problems, such as that hybrid electric vehicle externally discharges in the prior art and vehicle itself is caused to be difficult to operate normally.A kind of electric discharge management method of plug-in hybrid electric vehicle, comprising the following steps: high pressure on A, vehicle；B, power battery power supply is chosen whether；C, power is limited.A kind of electric discharge management system of plug-in hybrid electric vehicle, including entire car controller, relay unit, the battery controller being connect with relay unit, the air-conditioner controller that air-conditioning system electric power can be limited and the charge and discharge controller that bidirectional charger discharge power can be limited, charge and discharge controller, battery controller and air-conditioner controller are separately connected entire car controller, and entire car controller is also connected with detection unit.The present invention causes vehicle itself to be difficult to the case where operating normally when can be avoided vehicle to external discharge.

Description

A kind of electric discharge management method and system of plug-in hybrid electric vehicle
Technical field
The invention belongs to plug-in hybrid electric vehicle technical fields, are related to a kind of electric discharge management of plug-in hybrid electric vehicle Method and system.
Background technique
For automotive engineering with the development of society, plug-in hybrid electric vehicle is novel hybrid electric vapour Vehicle, can external charging, conventional power system and pure electric vehicle dynamical system are combined together, respective disadvantage is compensated for.
Include engine in plug-in hybrid electric vehicle, motor, power battery, battery, entire car controller, obtain power Battery status and to power battery carry out Cross prevention battery management system, be changed into low-voltage direct to high voltage direct current to vehicle The dcdc converter (DCDC, that is, direct current changes to direct current) of interior power supply for electrical equipment carries out heat management and vehicle interior to power battery The air-conditioning system and charger of heat management (On-board Charger is abbreviated as OBC).
There is the vehicle of assembly bidirectional charger on mixed dynamic power car plug-in at present, bidirectional charger can charge in insertion It to power battery charging when rifle, plugs and carries out external discharge when electric discharge is robbed, convert the left side 220V for high-tension battery high voltage direct current Right alternating current is used for external equipment.The way to manage of hybrid electric vehicle external discharge at present, as Chinese patent discloses Shen Please number for CN201510703454.X hybrid vehicle charging method and system shown in, be given to receive and externally put After electricity request, the oneself state of power battery is detected, and judge whether the oneself state meets default discharging condition；If Meet the default discharging condition, then controls the direct current that the two-way onboard charger provides power battery and be converted to exchange Electricity to external equipment to discharge；If being unsatisfactory for the default discharging condition, the hair of motor described in the driven by engine is controlled Direct current out, to discharge to the power battery charging and to the external equipment.
Although the charging method and system of the hybrid vehicle can realize that a certain extent hybrid vehicle is held Continuous externally electric discharge, but not in view of the electricity consumption of vehicle interior electrical equipment and the electricity consumption of air-conditioning system, engine also Do not start power supply power battery to power alone, and the crest discharge power of power battery is less than dcdc converter during discharge Electric power, air-conditioning system electric power and the sum of external equipment electric power when, the electric discharge of power battery sustained peak Power discharge can not meet the electricity consumption of current power equipment, it may appear that although the electricity of power battery is more, power battery The power battery protection of the too low triggering battery management system of crest discharge power, makes power battery stop power supply, so as to cause vehicle Power battery and two-way Vehicular charger function are unavailable, cause vehicle abnormality to be difficult to operate normally, and even if do not touch The power battery protection of battery management system is sent out, the low pressure that also will appear the output of dcdc converter underpower is difficult to maintain vehicle amount Power inside equipment electricity consumption, so as to cause battery to vehicle interior power supply for electrical equipment, accumulator electric-quantity is small to be finished quickly To damaging battery, and interior electrical equipment is prevented to enter suspend mode vehicle functions from normal use, it is also difficult after battery is out of power So that vehicle is again started up operation.Therefore the prior art discharges to hybrid electric vehicle management is simultaneously unreasonable and safe.
Summary of the invention
There is the above problem in the present invention, propose a kind of electric discharge management of plug-in hybrid electric vehicle in view of the prior art The technical issues of method and system, the electric discharge management method and system of the plug-in hybrid electric vehicle solve is how to avoid vehicle Vehicle itself is caused to be difficult to the case where operating normally when to external discharge.
The present invention is realized by following technical proposal: a kind of electric discharge management method of plug-in hybrid electric vehicle, we Method the following steps are included:
A, high pressure on vehicle: entire car controller receive electric discharge request, control power battery respectively with bidirectional charger, air-conditioning System is connected to dcdc converter；
B, choose whether power battery power supply: entire car controller obtains the shape of power battery by battery management system in real time State, the selection power battery power supply when being unsatisfactory for triggering engine and being powered condition；
C, limit power: entire car controller calculate in real time bidirectional charger discharge power, air-conditioning system electric power and The sum of the three of dcdc converter electric power, and when the sum of above-mentioned three is greater than current power battery peak discharge power, Limiting the sum of bidirectional charger discharge power and air-conditioning system electric power reduces, when the sum of above-mentioned three is lower than in limit procedure Current power battery peak discharge power, and when the satisfaction car electrical equipment electricity consumption of dcdc converter output power, it does not limit double Continue to reduce to the sum of charger discharge power and air-conditioning system electric power.
The electric discharge management method of this plug-in hybrid electric vehicle is in the external electric discharge request for receiving bidirectional charger transmission Afterwards, entire car controller works and controls high pressure on vehicle, that is, make power battery respectively with bidirectional charger, air-conditioning system and Dcdc converter connection, then external equipment, air-conditioning system and dcdc converter can carry out electricity consumption, the vehicle control after upper high pressure Device processed judges whether the state of power battery is needed to start engine power supply, the power electric in the power supply of no triggering engine Pond powers alone.
When power battery is powered alone, when entire car controller calculates bidirectional charger discharge power, air-conditioning system is used When the sum of three of electrical power and dcdc converter electric power is higher than the crest discharge power of power battery, show at this time dynamic Power battery maximum discharge power has been difficult to meet the use of bidirectional charger, air-conditioning system and dcdc converter these consuming components Electricity demanding, entire car controller limits the operating power of bidirectional charger and air-conditioning system in certain sequence, so that two-way fill The sum of three of motor discharge power, air-conditioning system electric power and dcdc converter electric power reduces, and the sum of three reduces Afterwards in real time compared with current power battery peak discharge power, it is lower than current power battery peak discharge power just in the sum of three The power battery protection of battery management system will not be triggered, so that power battery and two-way Vehicular charger function continue can be used, Simultaneously when limiting the sum of bidirectional charger discharge power and air-conditioning system electric power reduces, so that dcdc converter electric work Rate increases, and when dcdc converter output power meets interior electrical equipment electricity consumption, does not continue to reduce bidirectional charger electric discharge function The sum of the two of rate and air-conditioning system electric power, battery when dcdc converter output power meets interior electrical equipment electricity consumption It will not trigger to interior portion's low-voltage power supply, therefore the electricity of battery will not be consumed, then allow the vehicle to be again started up fortune Row, causes vehicle itself to be difficult to the case where operating normally when avoiding vehicle to external discharge.
In the electric discharge management method of above-mentioned plug-in hybrid electric vehicle, in above-mentioned step C, two-way charging is limited When the sum of machine discharge power and air-conditioning system electric power, entire car controller obtains the current shape of air-conditioning system by air-conditioner controller State, when air-conditioning system is to vehicle interior heat management, entire car controller first limits the reduction of air-conditioning system electric power, empty in limitation When adjusting system electric power is zero and also needs to continue limitation, entire car controller limits bidirectional charger discharge power and reduces；In sky When adjusting system is to power battery heat management, entire car controller first limits the reduction of bidirectional charger discharge power, is limiting two-way fill When motor discharge power is zero and also needs to continue limitation, entire car controller limits air-conditioning system electric power and reduces.By above-mentioned The sequence for determining power limit is operated, the preferential power kept to power battery heat management, be not to power battery heat management When, it first limits air-conditioning system power and is meeting bidirectional charger discharge power, air-conditioning system electric power and dcdc converter use The sum of three of electrical power is lower than current power battery peak discharge power, and dcdc converter output power meets interior electricity consumption When equipment electricity consumption, with regard to not carrying out limitation reduction to current bidirectional charger discharge power, have not been met then in air-conditioning system electricity consumption Bidirectional charger discharge power is reduced when power is zero.It is on the contrary then first limit two-way charging and discharging power, it is also needing to limit Air-conditioning system electric power is limited when processed.Limit bidirectional charger discharge power and air-conditioning system electric power one of them when two The sum of person will reduce.
In the electric discharge management method of above-mentioned plug-in hybrid electric vehicle, in above-mentioned step C, two-way fill is being reduced Motor discharge power and air-conditioning system electric power are to zero and dcdc converter output power has not been met interior electrical equipment Vehicle control unit controls power battery is disconnected with bidirectional charger, air-conditioning system and dcdc converter respectively when electricity consumption.? Limitation bidirectional charger discharge power and air-conditioning system electric power then make to interior electrical equipment electricity consumption is had not been met after zero High pressure under vehicle waits vehicle suspend mode, stops the electricity of battery consumption after vehicle suspend mode, vehicle is avoided to be difficult to start The problem of.
In the electric discharge management method of above-mentioned plug-in hybrid electric vehicle, in above-mentioned step C, entire car controller is logical Overvoltage sensor one obtains the voltage of battery, and entire car controller judges the voltages keep constant of battery and sentences when being not zero Disconnected dcdc converter output power meets interior electrical equipment electricity consumption.Battery is connected in parallel on dcdc converter in hybrid electric vehicle On current output terminal mouth, when dcdc converter output power is unsatisfactory for interior electrical equipment electricity consumption, dcdc converter output work Rate reduces, so that battery starts output voltage, electric current to interior power supply for electrical equipment, when dcdc converter output power meets When to storage battery power supply and to interior power supply for electrical equipment, that is to say, that do not fed in battery voltage, keep voltage constant When show that dcdc converter output power meets interior electrical equipment electricity consumption.
In the electric discharge management method of above-mentioned plug-in hybrid electric vehicle, in above-mentioned step B, power battery state It is right to be all larger than its in above-mentioned voltage, crest discharge power and electricity for voltage, crest discharge power and electricity including power battery When the electric discharge preset value answered, judgement is unsatisfactory for triggering engine and is powered, and enters step C；Voltage, peak value when power battery Discharge power and electricity at least one when being lower than corresponding electric discharge preset value, vehicle control unit controls driven by engine motor exports Direct current is powered to power battery charging and to air-conditioning system, dcdc converter and bidirectional charger, in power battery state After meeting engine stop condition of power supply, vehicle control unit controls engine is shut down, and power battery is powered alone, enters step C, When driven by engine motor exports direct current, C is not entered step.Its electricity, which also considers, not only to be considered to the state of power battery Crest discharge power and voltage avoid individually considering electricity, and when electricity is also higher, voltage and the decline of crest discharge power cause Power battery and bidirectional charger function are unavailable.As long as one of them is pre- lower than electric discharge for voltage, crest discharge power and electricity If just triggering engine when value is powered work, so that it is guaranteed that automotive discharge work carries out in the case where a safety.
In the electric discharge management method of above-mentioned plug-in hybrid electric vehicle, in above-mentioned step C, entire car controller is set There are maximum discharge power, the maximum electric power of dcdc converter and the maximum electric work of air-conditioning system for allowing bidirectional charger Rate, entire car controller judge that current power battery peak discharge power is greater than the maximum discharge power of bidirectional charger, DCDC becomes When the sum of the maximum electric power three of the maximum electric power of parallel operation and air-conditioning system certain value or when engine is powered, Entire car controller gradually releases function by the reverse sequence that limitation bidirectional charger discharge power and air-conditioning system electric power reduce Rate limitation.When vehicle generates electricity to external equipment, occurs and put in bidirectional charger, dcdc converter and air-conditioning system three When electricity or the power of electricity consumption are greater than its corresponding maximum allowable power, entire car controller limitation is more than pair of maximum allowable power As reducing electricity consumption or discharge power until dropping within maximum allowable power (including maximum allowable power), that is to say, that two-way to fill Motor, dcdc converter and air-conditioning system three can work in maximum allowable power substantially.When power battery peak value Power is greater than the maximum allowable power certain value of bidirectional charger, dcdc converter and air-conditioning system three after increasing, show to move Power battery can satisfy the power demand of current bidirectional charger, dcdc converter and air-conditioning system, and same engine is supplied Also it is able to satisfy the power demand of bidirectional charger, dcdc converter and air-conditioning system after electricity, comes into contact with power limit at this time, solves Except sequence is opposite with limitation sequence.
In the electric discharge management method of above-mentioned plug-in hybrid electric vehicle, entire car controller is preset with bidirectional charger and puts The corresponding engine power generation power meter of the sum of electrical power, air-conditioning system electric power and dcdc converter electric power three, it is whole Vehicle controller obtains bidirectional charger discharge power, air-conditioning system electric power when engine start operation is powered in real time With dcdc converter electric power and the sum of calculate three, and generated output table is looked into according to the sum of three and obtains corresponding power generation function Rate, vehicle control unit controls engine are generated electricity with obtained generated output.Make engine with corresponding hair by aforesaid operations Power generation avoids engine from causing energy dissipation using excessive engine power.
A kind of electric discharge management system of plug-in hybrid electric vehicle, including entire car controller, relay unit and relay The battery controller of unit connection can limit the air-conditioner controller of air-conditioning system electric power and can limit bidirectional charger electric discharge The charge and discharge controller of power, which is characterized in that the charge and discharge controller, battery controller and air-conditioner controller are separately connected vehicle Controller, the entire car controller are also connected with detection unit, and the entire car controller receives charge and discharge controller and sends electricity consumption The signal behavior power that battery controller makes relay unit by high pressure on vehicle, and sent by battery controller is controlled when request When battery is powered, entire car controller calculates bidirectional charger discharge power according to the signal that detection unit is sent, air-conditioning system is used The sum of electrical power and the three of dcdc converter electric power, and discharge in the sum of above-mentioned three greater than current power battery peak When power, limitation the sum of bidirectional charger discharge power and air-conditioning system electric power are reduced, as above-mentioned three in limit procedure The sum of be lower than current power battery peak discharge power, and dcdc converter output power is gone out according to the signal determining of detection unit When meeting interior electrical equipment electricity consumption, the sum of bidirectional charger discharge power and air-conditioning system electric power are not limited and continues to drop It is low.
In the electric discharge management system of this plug-in hybrid electric vehicle, the charge and discharge controller of bidirectional charger robs insertion in electric discharge The request of triggering output external discharge, entire car controller trigger after receiving the signal afterwards, export control signal and give battery management system The battery controller of system, battery controller control relay unit closure, make on vehicle high pressure be exactly make power battery respectively with Bidirectional charger, air-conditioning system are connected to dcdc converter, and then external equipment, air-conditioning system and dcdc converter can carry out The state of electricity consumption, the signal determining power battery sent again by battery controller later obtains whether power battery powers alone, When power battery is powered alone, entire car controller is calculated current bidirectional charger by the signal that detection unit is sent and discharges The sum of power, air-conditioning system electric power and three of dcdc converter electric power, and the sum of three is controlled with by battery The crest discharge power for the current power battery that device is sent is compared.
It is high in the sum of the three of bidirectional charger discharge power, air-conditioning system electric power and dcdc converter electric power When the crest discharge power of power battery, show that power battery maximum discharge power at this time has been difficult to meet two-way charging The power demand of machine, air-conditioning system and dcdc converter these consuming components, but there are no meet engine triggering charging at this time Operating condition, entire car controller limit the operating power of bidirectional charger and air-conditioning system in certain sequence, so that two-way The sum of three of charger discharge power, air-conditioning system electric power and dcdc converter electric power reduces, and makes the sum of three Lower than the power battery protection that current power battery peak discharge power would not trigger battery management system, thus power battery Continue can be used with two-way Vehicular charger function, while in limitation bidirectional charger discharge power and air-conditioning system electric power two When the sum of person reduces, so that dcdc converter electric power increases, meet interior electrical equipment in dcdc converter output power When electricity consumption, current power limitation is kept, interior electrical equipment electricity consumption is met by dcdc converter output power, battery will not touch Interior portion's low-voltage power supply is issued, therefore the electricity of battery will not be consumed, then allows the vehicle to be again started up operation.
In the electric discharge management system of above-mentioned plug-in hybrid electric vehicle, entire car controller is sent by battery controller Signal acquisition power battery state, power battery state include the voltage of power battery, crest discharge power and electricity, described whole Vehicle controller is connected with engine controller and electric machine controller, when power battery voltage, crest discharge power and electricity extremely When lacking one lower than corresponding electric discharge preset value, entire car controller transmission control signal starts motor-driven to engine controller controls Make, and send control signal and control motor output torque to electric machine controller, meets engine stop in power battery state and supply After electric condition, vehicle control unit controls engine is shut down.It is not enough to alone by above-mentioned setting entire car controller in power battery When power supply, so that driven by engine motor is exported direct current by engine controller and electric machine controller and power battery is filled Electricity and to air-conditioning system, dcdc converter and bidirectional charger power.
In the electric discharge management system of above-mentioned plug-in hybrid electric vehicle, the detection unit includes for obtaining electric power storage The voltage sensor one of cell voltage, the voltage sensor two for detecting air-conditioning system utilization voltage, for detecting air-conditioning system It is the current sensor two of electricity consumption electric current, the voltage sensor three for detecting bidirectional charger discharge voltage, two-way for detecting The current sensor three of charger discharge current, the voltage sensor four for detecting dcdc converter utilization voltage and for examining Survey the current sensor four of dcdc converter discharge current.The signal that these devices of detection unit will test is sent to vehicle control Air-conditioning system electric power, bidirectional charger discharge power and dcdc converter electric work is calculated in device processed, entire car controller Rate, wherein voltage sensor one detects whether dcdc converter output power meets interior electrical equipment electricity consumption.
Compared with prior art, the electric discharge management method and system of this plug-in hybrid electric vehicle have the advantage that
1, the present invention can consider the power consumption and power of current each consuming components when power battery is powered alone The crest discharge power of battery, and the operating power of bidirectional charger and air-conditioning system can be limited, make vehicle to external discharge Shi Buhui triggers the power battery protection of battery management system, to guarantee that power battery and two-way Vehicular charger function continue It can use.
2, the present invention not limiting DC/DC converter electric work when power battery is powered alone and needs to carry out power limit Rate, power limit make the electricity of battery not also for keeping dcdc converter output power to meet interior electrical equipment electricity consumption It can be consumed, then allow the vehicle to be again started up operation, it is ensured that automotive discharge work carries out in the case where a safety.
Detailed description of the invention
Fig. 1 is the main flow schematic diagram of method in the present invention.
Fig. 2 is battery management system in the present invention, power battery, bidirectional charger, air-conditioning system, dcdc converter, hair The schematic diagram connected between motivation and motor.
Fig. 3 is system attachment structure schematic diagram of the invention.
In figure, 1, entire car controller；2, power battery；3, battery management system；3a, battery controller；4, two-way charging Machine；4a, charge and discharge controller；5, air-conditioning system；5a, air-conditioner controller；6, dcdc converter；7, detection unit；7a, voltage sensor Device one；8, battery；9, engine controller；10, electric machine controller；11, main positive relay；12, main negative relay；13, it fills Put relay；14, engine；15, motor；16, without key activation system；17, temperature sensor.
Specific embodiment
The following is specific embodiments of the present invention, and in conjunction with attached drawing, technical scheme of the present invention will be further described, However, the present invention is not limited to these examples.
As shown in Figure 1, Figure 2 and Figure 3, the electric discharge management method of a kind of plug-in hybrid electric vehicle, comprising the following steps:
Step A, high pressure on vehicle: entire car controller 1 receive electric discharge request, control power battery 2 respectively with two-way charging Machine 4, air-conditioning system 5 are connected to dcdc converter 6.Entire car controller 1 receives electric discharge request after insertion electric discharge is robbed, at this time table Bright needs discharge to outside, and entire car controller 1 controls high pressure on vehicle, make to connect between power battery 2 and bidirectional charger 4 Logical, when running after being inserted into external electric equipment and robbing to electric discharge, bidirectional charger 4 can carry out inversion and supply external electric equipment Electricity；It is connected between power battery 2 and air-conditioning system 5, electricity operation can be obtained when then air-conditioning system 5 is run；Power battery 2 and DCDC It is connected between converter 6, the high voltage direct current of power battery 2 can be converted to low-voltage direct to interior electricity consumption by dcdc converter 6 Equipment power supply, interior electrical equipment includes each controller and low pressure electric device of vehicle.
Step B, choose whether the power supply of power battery 2: entire car controller 1 obtains power by battery management system 3 in real time The state of battery 2, when being unsatisfactory for triggering engine 14 and being powered condition, selection power battery 2 is powered.Battery management system 3 It can obtain power battery 2 each state for the management system of power battery 2 and judged and be transferred to other controllers. 2 state of power battery of acquisition includes the voltage of power battery 2, crest discharge power and electricity.Crest discharge power refers to The maximum power that power battery 2 can provide whithin a period of time under current state, with the electricity of power battery 2 and dynamic The temperature of power battery 2 is related.Battery management system 3 be provided with different electricity and at a temperature of corresponding 2 peak work of power battery Rate table, this is obtained by working condition experimenting as the prior art.Therefore according to electricity and temperature, battery management system 3 can be worked as Preceding 2 crest discharge power of power battery.
When voltage, crest discharge power and electricity are all larger than its corresponding electric discharge preset value, judgement is unsatisfactory for triggering hair Motivation 14 is powered, and enters step C.The electric discharge values of the voltage of power battery 2 are 280 volts to 320 volts, as excellent The electric discharge preset value for selecting voltage is 310 volts；The corresponding electric discharge values of the crest discharge power of power battery 2 are 8 kilowatts To 12 kilowatts, the electric discharge preset value as preferred peak discharge power is 10 kilowatts；The electric discharge preset value of the electricity of power battery 2 Range is the 18% to 25% of 2 electricity of rated power battery, and the electric discharge preset value as preferred electricity is 2 electricity of rated power battery The 20% of amount.
It is whole when the voltage of power battery 2, crest discharge power and electricity, at least one is lower than corresponding electric discharge preset value Vehicle controller 1 controls engine 14 and motor 15 is driven to export direct current to the charging of power battery 2 and to air-conditioning system 5, DCDC Converter 6 and bidirectional charger 4 are powered, after 2 state of power battery meets the stopping condition of power supply of engine 14, entire car controller 1 control engine 14 is shut down, and power battery 2 is powered alone, enters step C, drives motor 15 to export direct current in engine 14 When, do not enter step C.It is three that engine 14, which stops condition of power supply, and engine 14 stops power supply when meeting any one condition. Condition one, greater than definite value one and when 2 crest discharge power of power battery is greater than definite value two, engine 14 stops power supply to electricity, wherein Definite value one is greater than the electric discharge preset value of electricity, and the range of definite value one is the 35% to 45% of 2 electricity of rated power battery, as It is preferred that definite value one is the 40% of 2 electricity of rated power battery, definite value two is greater than its range of the electric discharge preset value of crest discharge power It is 18 kilowatts to 22 kilowatts, is 20 kilowatts as preferred definite value two；Condition two, engine 14 stops supplying when electricity is greater than definite value three Electricity, definite value three are greater than definite value two and in the range of the 65% to 75% of 2 electricity of rated power battery, are volume as preferred definite value three The 70% of 2 electricity of determined power battery；Condition three, engine 14 stops power supply when voltage is greater than definite value four, and definite value four is greater than voltage Electric discharge preset value and in the range of 370 volts to 390 volts, as preferred definite value four be 380 volts.Above-mentioned electric discharge preset value, definite value One can be demarcated according to the actual situation to definite value four.
Entire car controller 1 is preset with 4 discharge power of bidirectional charger, 5 electric power of air-conditioning system and dcdc converter 6 and uses The corresponding 14 generated output table of engine of the sum of electrical power three, entire car controller 1 are powered in the starting operation of engine 14 When obtain in real time 4 discharge power of bidirectional charger, 5 electric power of air-conditioning system and 6 electric power of dcdc converter and calculate three The sum of person, and generated output table is looked into according to the sum of three and obtains corresponding generated output, entire car controller 1 control engine 14 with The corresponding obtained generated output power generation of generated output table.Make engine 14 with corresponding generated output hair by aforesaid operations Electricity avoids engine 14 from causing energy dissipation using excessive engine power.As preferably 4 discharge power of bidirectional charger, 5 electric power of air-conditioning system and 6 electric power of dcdc converter and calculate the sum of three greater than 5 kilowatts it is for 10 seconds when, control 14 generated output of engine is 8 kilowatts；In 4 discharge power of bidirectional charger, 5 electric power of air-conditioning system and dcdc converter 6 When the sum of electric power three is for 10 seconds less than 4.5 kilowatts, control 14 generated output of engine is 6.5 kilowatts.
Step C, limit power: entire car controller 1 calculates 4 discharge power of bidirectional charger, 5 electricity consumption of air-conditioning system in real time The sum of the three of 6 electric power of power and dcdc converter, and it is greater than 2 crest discharge of current power battery in the sum of above-mentioned three When power, limitation the sum of 4 discharge power of bidirectional charger and 5 electric power of air-conditioning system are reduced, above-mentioned three in limit procedure The sum of person is lower than 2 crest discharge power of current power battery, and 6 output power of dcdc converter meets interior electrical equipment electricity consumption When, the sum of 5 electric power of 4 discharge power of bidirectional charger and air-conditioning system is not limited to be continued to reduce.It is supplied alone in power battery 2 Electricity i.e. engine 14, which does not work, carries out judging whether to limitation power when powering.On vehicle after high pressure, bidirectional charger 4, Air-conditioning system 5 and the available electric consumption power of dcdc converter 6.When entire car controller 1 calculates the electric discharge function of bidirectional charger 4 The sum of three of 6 electric power of rate, 5 electric power of air-conditioning system and dcdc converter is lower than the crest discharge function of power battery 2 Power battery normal power supply works when rate.
When entire car controller 1 calculates 4 discharge power of bidirectional charger, 5 electric power of air-conditioning system and dcdc converter 6 When the sum of three of electric power is higher than the crest discharge power of power battery 2, show the maximum electric discharge function of power battery 2 at this time Rate has been difficult to meet the power demand of 6 these consuming components of bidirectional charger 4, air-conditioning system 5 and dcdc converter, need into Row power limit.Power limit only limits 5 electric power of 4 discharge power of bidirectional charger and/or air-conditioning system, so that they The sum of power consumption reduces, and since bidirectional charger 4, air-conditioning system 5 and dcdc converter 6 are powered by power battery 2, is limiting After 4 discharge power of bidirectional charger and/or 5 electric power of air-conditioning system processed, the electric power of dcdc converter 6 can be increased.This Embodiment concrete restriction process is as follows:
When that need to limit the sum of 5 electric power of 4 discharge power of bidirectional charger and air-conditioning system, entire car controller 1 passes through Air-conditioner controller 5a obtains 5 current state of air-conditioning system, and when air-conditioning system 5 is to vehicle interior heat management, entire car controller 1 is first Limiting 5 electric power of air-conditioning system reduces, and the reduction rate of limitation can demarcate according to the actual situation, and the present embodiment uses 0.1 thousand Watt/0.1 second rate reduces, meet 4 discharge power of bidirectional charger, air-conditioning during 5 electric power of air-conditioning system reduces The sum of three of 6 electric power of 5 electric power of system and dcdc converter is lower than 2 crest discharge power of current power battery, and When 6 output power of dcdc converter meets interior electrical equipment electricity consumption, does not continue to reduce by 5 electric power of air-conditioning system, limit 5 electric power of air-conditioning system is zero also to need to continue to limit when having not been met above-mentioned condition, and entire car controller 1 limits bidirectional charger 4 discharge powers are reduced with given pace, are become until meeting 4 discharge power of bidirectional charger, 5 electric power of air-conditioning system and DCDC The sum of three of 6 electric power of parallel operation is lower than 2 crest discharge power of current power battery, and 6 output power of dcdc converter is full Foot car electrical equipment electricity consumption.The rate can also demarcate, and the present embodiment was reduced using 0.1 kilowatt/0.1 second rate.
When air-conditioning system 5 is to 2 heat management of power battery, entire car controller 1 first limit 4 discharge power of bidirectional charger with 0.1 kilowatt/0.1 second rate reduces, when limitation 4 discharge power of bidirectional charger is zero and also needs to continue limitation, vehicle control Device 1 processed is limited 5 electric power of air-conditioning system and is reduced with 0.1 kilowatt/0.1 second rate, until meeting the electric discharge function of bidirectional charger 4 The sum of three of 6 electric power of rate, 5 electric power of air-conditioning system and dcdc converter is lower than 2 crest discharge of current power battery Power, and 6 output power of dcdc converter meets interior electrical equipment electricity consumption.The suitable of power limit is determined by aforesaid operations Sequence, the preferential power kept to 2 heat management of power battery first limit air-conditioning system 5 when not being to 2 heat management of power battery Power, it is on the contrary then first limit two-way charging and discharging power.
When air-conditioning system 5 works without electricity consumption, entire car controller 1 only limits 4 discharge power of bidirectional charger.It is dropping Low 4 discharge power of bidirectional charger and 5 electric power of air-conditioning system are to zero and 6 output power of dcdc converter has not been met vehicle Entire car controller 1 controls power battery 2 and converts respectively with bidirectional charger 4, air-conditioning system 5 and DCDC when interior electrical equipment electricity consumption Device 6 disconnects, that is, lower high pressure.In limitation 4 discharge power of bidirectional charger and 5 electric power of air-conditioning system to after zero Interior electrical equipment electricity consumption is had not been met, then makes high pressure under vehicle, each controller prepares suspend mode according to existing in lower high pressure rear vehicle " straight-forward network management agreement " work having realizes that electricity does not work under vehicle, that is, in vehicle after each controller suspend mode The electricity for stopping battery consumption 8 after suspend mode, avoids the problem that vehicle is difficult to start.It discharges in limitation bidirectional charger 4 Power is zero greater than after a period of time, and entire car controller 1 also controls high pressure under vehicle, and time range is one minute to two minutes, As preferably one minute, since limitation 4 discharge power of bidirectional charger is zero to reach one minute, the time was longer, normal circuit There is no the so long limitation time, therefore there may be problems for discharge circuit, control high pressure under vehicle, protect vehicle.
Whether 6 output power of dcdc converter meets interior electrical equipment electricity consumption is judged by entire car controller 1, full-vehicle control Device 1 by one 7a of voltage sensor obtain battery 8 voltage, entire car controller 1 judge the voltages keep constant of battery 8 and Judge that 6 output power of dcdc converter meets interior electrical equipment electricity consumption when being not zero.Battery 8 is in parallel in hybrid electric vehicle On 6 current output terminal mouth of dcdc converter, when 6 output power of dcdc converter is unsatisfactory for interior electrical equipment electricity consumption, 6 output power of dcdc converter reduces, so that battery 8 starts output voltage, electric current to interior power supply for electrical equipment, works as DCDC It powers when 6 output power of converter meets to battery 8 and gives car power supply for electrical equipment, that is to say, that in 8 voltage of battery It does not feed, keeps showing that 6 output power of dcdc converter meets interior electrical equipment electricity consumption when voltage is constant.
In limiting power process or when keeping current limitation power, solution when need to release power limitation condition that encounters satisfaction Except power limit, releasing power limitation condition is that entire car controller 1 judges 2 crest discharge power of current power battery greater than two-way The maximum electric power three of the maximum discharge power of charger 4, the maximum electric power of dcdc converter 6 and air-conditioning system 5 The sum of certain value when or engine 14 when being powered, entire car controller 1 is by limitation 4 discharge power of bidirectional charger and air-conditioning system The reverse sequence of 5 electric powers of uniting gradually releases power limit.I.e. limitation sequence is that first limitation 5 electric power of air-conditioning system limits again When 4 discharge power of bidirectional charger processed, lift restrictions power then first release 4 discharge power of bidirectional charger power limit after solve Except the power limit of 5 electric power of air-conditioning system；Limitation sequence is that first limitation 4 discharge power of bidirectional charger limits limitation sky again When 5 electric power of adjusting system, lift restrictions power then first release 5 electric power of air-conditioning system power limit after release two-way fill The power limit of 4 discharge power of motor.When only limiting 5 electric power of air-conditioning system and 4 discharge power of bidirectional charger wherein one When a, the power that lifts restrictions also only releases confined object.The power that lifts restrictions restores electric power, and power releasing is pressed Given pace realizes that the rate for releasing power limit can demarcate, and the present embodiment was gradually released using 0.1 kilowatt/0.1 second rate Power limit.Step A is reentered after lifting restrictions.
It carries out power limit and releases power limit to carry out according to certain reduction rate or increase rate, pass through 0.1 kilowatt/0.1 second rate is reduced or is increased, and can be avoided reduction rate or increase rate is too fast, lead to electrical equipment function Rate conversion is too fast, and electronic device receives the problem of impacting macrolesion electrical equipment.
Entire car controller 1 is equipped with the maximum electric work of the maximum discharge power, dcdc converter 6 that allow bidirectional charger 4 The maximum electric power of rate and air-conditioning system 5.The selection range of the maximum discharge power of bidirectional charger 4 is 0 to 3.3 kilowatts, The maximum electric power selection range of dcdc converter 6 is 0 to 3 kilowatts, and the maximum electric power selection range of air-conditioning system 5 is 0 to 6.8 kilowatts.When vehicle generates electricity to external equipment, in 5 three of bidirectional charger 4, dcdc converter 6 and air-conditioning system When occurring the power of electric discharge or electricity consumption greater than its corresponding maximum allowable power, the limitation of entire car controller 1 is more than maximum fair Perhaps the object of power reduces electricity consumption or discharge power until dropping within maximum allowable power (including maximum allowable power), also It is to say that bidirectional charger 4, dcdc converter 6 and 5 three of air-conditioning system can work in maximum allowable power substantially.When 2 peak power of power battery is greater than the maximum allowable function of 5 three of bidirectional charger 4, dcdc converter 6 and air-conditioning system after increasing Rate certain value shows that power battery 2 can satisfy the electricity consumption need of current bidirectional charger 4, dcdc converter 6 and air-conditioning system 5 It asks, same engine 14 is also able to satisfy bidirectional charger 4, dcdc converter 6 and air-conditioning system 5 electricity consumption after being powered needs It asks, comes into contact with power limit at this time, releasing sequence is opposite with limitation sequence.Above-mentioned certain value range is 1 kilowatt to 3 kilowatts, As preferably 2 kilowatts.
When releasing 5 electric power power limit of air-conditioning system, compare the current air-conditioning system sent by air-conditioner controller 5a The size of the maximum electric power for 5 request power and the preset air-conditioning system 5 of uniting is chosen after smaller value is used as releasing power and is restored Target power.Request power needed for air-conditioner controller 5a can obtain air-conditioning system 5 is the prior art.It is similarly double in releasing When to 4 electric power power limit of charger, compare by the current bidirectional charger 4 that charge and discharge controller 4a is sent request power and The size of the maximum discharge power of preset bidirectional charger 4 chooses smaller value as the target power restored after releasing power. Alternatively, when releasing power limit, the maximum electric power of air-conditioning system 5 and the maximum of bidirectional charger 4 Discharge power is respectively as recovery power target.
After entire car controller 1 receives external request for electricity, judge that vehicle does not power on i.e. vehicle power supply and is in OFF When shelves, entire car controller 1 wakes up air-conditioning system 5 by LIN bus and carries out 2 heat management of power battery, thus in power generation process Protect power battery 2.
When needing to start the drive power supply of motor 15 of engine 14, entire car controller 1 judges whether vehicle power supply is in ON When shelves, then judge whether engine 14 is in starting state, it is whole when power supply is in ON grades and engine 14 is in starting state Vehicle controller 1 controls motor 15 and works, and engine 14 drives motor 15 to be powered work, is in ON grades of engines 14 in power supply When flameout state, entire car controller 1, which first controls the starting of engine 14 and controls engine 14 again, drives motor 15 to be powered.? Entire car controller 1 first requests vehicle power supply to be in ON grades when power supply is in OFF grades, controls engine 14 again later and drives motor 15 It is powered.When the power generation of engine 14 is powered, amount of fuel is detected by fuel-quantity transducer in real time, in amount of fuel lower than oil When measuring threshold value, entire car controller 1 stops engine 14 and starts, and controls high pressure under vehicle, into dormant state, to avoid oil Measure it is very few cause vehicle cannot again vehicle run the problem of.
Entire car controller 1 monitors the electricity of power battery 2 in real time during discharge, is lower than in the electricity of power battery 2 When lowest limit, entire car controller 1 controls high pressure under vehicle, and vehicle is made to enter dormant state.In power battery 2 lower than minimum Show that discharge circuit generates failure when lower limit value, by high pressure under vehicle, avoids then protecting battery and protection to external discharge Vehicle.
The electric discharge management method of this plug-in hybrid electric vehicle has been difficult to meet double in 2 maximum discharge power of power battery To 6 these consuming components of charger 4, air-conditioning system 5 and dcdc converter power demand when, entire car controller 1 is by certain suitable Sequence limits the operating power of bidirectional charger 4 and air-conditioning system 5, so that 4 discharge power of bidirectional charger, air-conditioning system 5 The sum of three of 6 electric power of electric power and dcdc converter reduces, and puts the sum of three lower than 2 peak value of current power battery The power battery 2 that electrical power would not trigger battery management system 3 is protected, thus power battery 2 and two-way Vehicular charger 15 Function continues can be used.Simultaneously when limiting the sum of 4 discharge power of bidirectional charger and 5 electric power of air-conditioning system reduces, so that 6 electric power of dcdc converter increases, and when 6 output power of dcdc converter meets interior electrical equipment electricity consumption, does not continue to drop The sum of the two of low 4 discharge power of bidirectional charger and 5 electric power of air-conditioning system, 6 output power of dcdc converter meet vehicle Battery 8 will not be triggered to interior portion's low-voltage power supply when interior electrical equipment electricity consumption, therefore the electricity of battery 8 will not be consumed, after And it allows the vehicle to be again started up operation, the feelings for causing vehicle itself to be difficult to operate normally when avoiding vehicle to external discharge Condition.
As shown in Figures 2 and 3, the electric discharge management system of a kind of plug-in hybrid electric vehicle, using above-mentioned plug-in mixing The electric discharge management method of power car.This management system includes entire car controller 1, relay unit, connect with relay unit And can send the battery controller 3a of 2 state of power battery, can limit 5 electric power of air-conditioning system air-conditioner controller 5a and The charge and discharge controller 4a of 4 discharge power of bidirectional charger can be limited.Charge and discharge controller 4a, battery controller 3a and air-conditioner controller 5a is bi-directionally connected with entire car controller 1 respectively, and entire car controller 1 is also connected with detection unit 7.
Battery controller 3a is the controller of battery management system 3, and air-conditioner controller 5a is the controller of air-conditioning system 5, Charge and discharge controller 4a is the controller of bidirectional charger 4.
Relay unit includes main positive relay 11, main negative relay 12 and charge and discharge relay 13, charge and discharge relay 13 Normal open switch one end connects the anode of power battery 2, and the other end connects the anode of bidirectional charger 4, the line of charge and discharge relay 13 The output end of circle connection battery controller 3a；The anode of normal open switch one end connection power battery 2 of main positive relay 11, it is another The positive pole of end connection air-conditioning system 5 and the positive pole of dcdc converter 6, the coil of main positive relay 11 connect battery The output end of controller 3a；The cathode of one end connection power battery 2 of the normal open switch of main negative relay 12, other end connection are empty The power cathode of the power cathode of adjusting system 5, the cathode of bidirectional charger 4 and dcdc converter 6, the line of main negative relay 12 The output end of circle connection battery controller 3a.
Detection unit 7 includes for obtaining one 7a of voltage sensor of 8 voltage of battery, using for detecting air-conditioning system 5 The voltage sensor two of piezoelectric voltage, the current sensor two for detecting 5 electricity consumption electric current of air-conditioning system, for detecting two-way charging The voltage sensor three of 4 discharge voltage of machine, the current sensor three for detecting 4 discharge current of bidirectional charger, for detecting The voltage sensor four of 6 utilization voltage of dcdc converter, the current sensor four for detecting 6 discharge current of dcdc converter. The signal that these devices of detection unit 7 will test is sent to entire car controller 1, and air-conditioning system 5 is calculated in entire car controller 1 6 electric power of electric power, 4 discharge power of bidirectional charger and dcdc converter.
Entire car controller 1 is connected with engine controller 9 and electric machine controller 10, and entire car controller 1 is also and for sending Gear locating for vehicle power supply is connected without key activation system 16.The input terminal of battery controller 3a is connected with temperature sensor 17.The input terminal of entire car controller 1 can also be connected with fuel-quantity transducer.
In addition in the car, the anode of power battery 2 and cathode are separately connected battery management system 3, by battery management system Voltage sensor and current sensor in system 3 obtain the voltage of power battery 2, electric current relevant information and are sent to battery control Device 3a, bidirectional charger 4 be used for be inserted into electric discharge rob (electric discharge rob and in Fig. 2 bidirectional charger 4 anode and cathode output end company Connect), the power output end of dcdc converter 6 is for connecting output electricity with interior electrical equipment (in interior electrical equipment and Fig. 2 The anode of dcdc converter 6 is connected with cathode output end), anode connection 6 power output end of dcdc converter of battery 8 is just The cathode of pole, battery 8 connects 6 power output end cathode of dcdc converter.Electric discharge robs one and is used to be inserted into bidirectional charger 4, Other end is socket for being inserted into external electric equipment.Engine 14 can be connect with motor 15, and the power supply output end of motor 15 It is separately connected the anode and cathode of power battery 2.
When electric discharge is robbed and is inserted into bidirectional charger 4, the charge and discharge controller 4a triggering of bidirectional charger 4 sends external use To entire car controller 1, entire car controller 1 controls high pressure on vehicle for electricity request, and entire car controller 1 sends control signal and gives battery control The main positive relay 11 of device 3a processed, battery controller 3a control, main negative relay 12 and charge and discharge relay 13 are closed, so that Power battery 2 is connected to bidirectional charger 4, air-conditioning system 5 and dcdc converter 6 respectively, then external equipment, air-conditioning system 5 And dcdc converter 6 can carry out electricity consumption.After upper high pressure, entire car controller 1 obtains the signal that battery controller 3a is sent and obtains 2 state of power battery is taken, 2 state of power battery includes the voltage of power battery 2, crest discharge power and electricity.Wherein peak value Discharge power, the current power electricity sent by battery controller 3a according to 2 current electric quantity of power battery and temperature sensor 17 2 temperature of pond tables look-up to obtain.The full-vehicle control when selecting power battery 2 to power according to current voltage, crest discharge power and electricity Device 1 calculates separately out 4 discharge power of bidirectional charger, 5 electric power of air-conditioning system according to the signal that detection unit 7 is sent in real time With 6 electric power of dcdc converter, and the sum of three is obtained, and be greater than 2 peak value of current power battery in the sum of above-mentioned three and put When electrical power, limitation the sum of 4 discharge power of bidirectional charger and 5 electric power of air-conditioning system are reduced, and the control process of limitation is such as Shown in the electric discharge management method of plug-in hybrid electric vehicle, wherein passing through charge and discharge control when limiting 4 discharge power of bidirectional charger Device 4a processed realizes, the frequency of power tube (such as metal-oxide-semiconductor) on-off limits or extensive in charge and discharge controller 4a control bidirectional charger 4 The discharge power of multiple bidirectional charger 4, charge and discharge controller 4a realize that the power limit of bidirectional charger 4 is the prior art, are limiting It when 5 electric power of air-conditioning system processed, is realized by air-conditioner controller 5a, air-conditioner controller 5a controls 5 power circuit of air-conditioning system The frequency of middle power tube (such as metal-oxide-semiconductor) on-off limits or restores the electric power of air-conditioning system 5, and air-conditioner controller 5a realizes The power limit of bidirectional charger 4 is the prior art.
When the sum of above-mentioned three is lower than 2 crest discharge power of current power battery (2 peak of current power battery when limiting power Value discharge power is that real-time acquired value is dynamic change, calculate in real time the sum of above-mentioned three in real time with it is corresponding when the power inscribed 2 crest discharge power of battery compares), and it is full according to the signal determining of one 7a of voltage sensor to go out 6 output power of dcdc converter When foot car electrical equipment electricity consumption, the sum of 5 electric power of 4 discharge power of bidirectional charger and air-conditioning system is not limited and continues to drop It is low.It the sum of does not limit in limitation power process or 5 electric power of 4 discharge power of bidirectional charger and air-conditioning system and continues to drop When low, encounter satisfaction and release power limit when need to release power limitation condition.
It is whole when the voltage of power battery 2, crest discharge power and electricity, at least one is lower than corresponding electric discharge preset value Vehicle controller 1 sends control signal and controls the movement of engine 14 to engine controller 9, and sends control signal to motor control Device 10 controls 15 output torque of motor, and engine 14 drives motor 15 to export direct current and supplies electricity to the charging of power battery 2 and fill to two-way Motor 4, air-conditioning system 5 and dcdc converter 6 are powered.After 2 state of power battery meets the stopping condition of power supply of engine 14, Entire car controller 1 controls engine 14 and shuts down.
When needing to start the drive power supply of motor 15 of engine 14, entire car controller 1 is sent out by no key activation system 16 When the signal sent judges whether vehicle power supply is in ON grades, engine is judged by the signal that engine controller 9 is sent later Whether 14 be in starting state, and when power supply is in ON grades and engine 14 is in starting state, entire car controller 1 passes through motor Controller 10 controls motor 15 and works, and engine 14 drives motor 15 to be powered work, is in ON grades and engine in power supply When 14 flameout state, entire car controller 1 first passes through engine controller 9 and controls the starting of engine 14 and control 14 band of engine again Dynamic motor 15 is powered.When power supply is in OFF grades, entire car controller 1 first requests no key activation system 16 to make vehicle power supply In ON grades, after vehicle power supply is in ON grades, then controls engine 14 and motor 15 is driven to be powered.It generates electricity in engine 14 When being powered, amount of fuel is detected by fuel-quantity transducer in real time, when amount of fuel is lower than oil mass threshold value, entire car controller 1 stops Only engine 14 starts, and controls high pressure under vehicle, into dormant state, to avoid oil mass is very few from causing vehicle cannot be again The problem of vehicle is run.
In the electric discharge management system of this plug-in hybrid electric vehicle, by air-conditioner controller 5a and charge and discharge controller 4a, The sum of three of 6 electric power of 4 discharge power of bidirectional charger, 5 electric power of air-conditioning system and dcdc converter is lower than power When the crest discharge power of battery 2, the operating power of bidirectional charger 4 and air-conditioning system 5 is limited, so that bidirectional charger The sum of three of 6 electric power of 4 discharge powers, 5 electric power of air-conditioning system and dcdc converter reduces, and is lower than the sum of three The power battery 2 that 2 crest discharge power of current power battery would not trigger battery management system 3 is protected, thus power battery 2 Continue can be used with two-way 15 function of Vehicular charger, while not 6 electric power of limiting DC/DC converter, in limitation bidirectional charger When 4 discharge powers and 5 electric power sum of the two of air-conditioning system reduce, so that 6 electric power of dcdc converter increases, in DCDC When 6 output power of converter meets interior electrical equipment electricity consumption, current power limitation is kept, by 6 output power of dcdc converter Meet interior electrical equipment electricity consumption, battery 8 will not be triggered to interior portion's low-voltage power supply, therefore the electricity of battery 8 will not be disappeared Consumption, then allows the vehicle to be again started up operation.
Specific embodiment described herein is only to give an example to the present invention.The technical field of the invention Technical staff can make various modifications or additions to the described embodiments or be substituted in a similar manner, but Without departing from the spirit of the invention or going beyond the scope defined by the appended claims.
Although be used more herein entire car controller 1, power battery 2, battery management system 3, battery controller 3a, Bidirectional charger 4, charge and discharge controller 4a, air-conditioning system 5, air-conditioner controller 5a, dcdc converter 6, detection unit 7, voltage pass One 7a of sensor, battery 8, engine controller 9, electric machine controller 10, main positive relay 11, main negative relay 12, charge and discharge after Electric appliance 13, engine 14, motor 15, without terms such as key activation system 16, temperature sensors 17, but be not precluded using other A possibility that term.The use of these items is only for be more convenient to describe and explain essence of the invention；They are explained It at any additional limitation is disagreed with spirit of that invention.

Claims (10)

1. a kind of electric discharge management method of plug-in hybrid electric vehicle, which is characterized in that this method the following steps are included:
A, high pressure on vehicle: entire car controller (1) receive electric discharge request, control power battery (2) respectively with bidirectional charger (4), air-conditioning system (5) is connected to dcdc converter (6)；
B, choose whether power battery (2) power supply: entire car controller (1) obtains power electric by battery management system (3) in real time The state in pond (2), when being unsatisfactory for triggering engine (14) and being powered condition, selection power battery (2) is powered；
C, limit power: entire car controller (1) calculates bidirectional charger (4) discharge power in real time, air-conditioning system (5) uses electric work The sum of the three of rate and dcdc converter (6) electric power, and be greater than current power battery (2) peak value in the sum of above-mentioned three and put When electrical power, limitation the sum of bidirectional charger (4) discharge power and air-conditioning system (5) electric power are reduced, in limit procedure when The sum of above-mentioned three is lower than current power battery (2) crest discharge power, and dcdc converter (6) output power meets interior use When electric equipment electricity consumption, the sum of bidirectional charger (4) discharge power and air-conditioning system (5) electric power are not limited and continues to reduce.
2. the electric discharge management method of plug-in hybrid electric vehicle according to claim 1, which is characterized in that in above-mentioned step In rapid C, when limiting the sum of bidirectional charger (4) discharge power and air-conditioning system (5) electric power, entire car controller (1) passes through Air-conditioner controller (5a) obtains air-conditioning system (5) current state, when air-conditioning system (5) is to vehicle interior heat management, vehicle control Device (1) processed first limits the reduction of air-conditioning system (5) electric power, is zero and also needs to continue in limitation air-conditioning system (5) electric power When limitation, entire car controller (1) limits bidirectional charger (4) discharge power and reduces；In air-conditioning system (5) to power battery (2) When heat management, entire car controller (1) first limits the reduction of bidirectional charger (4) discharge power, discharges in limitation bidirectional charger (4) When power is zero and also needs to continue limitation, entire car controller (1) limits air-conditioning system (5) electric power and reduces.
3. the electric discharge management method of plug-in hybrid electric vehicle according to claim 2, which is characterized in that in above-mentioned step In rapid C, reduce bidirectional charger (4) discharge power and air-conditioning system (5) electric power to zero and dcdc converter (6) it is defeated When power has not been met interior electrical equipment electricity consumption out entire car controller (1) control power battery (2) respectively with bidirectional charger (4), air-conditioning system (5) and dcdc converter (6) disconnect.
4. the electric discharge management method of plug-in hybrid electric vehicle according to claim 1 or 2 or 3, which is characterized in that upper In the step C stated, entire car controller (1) obtains the voltage of battery (8), entire car controller by voltage sensor one (7a) (1) judge the voltages keep constant of battery (8) and judge that dcdc converter (6) output power meets interior electricity consumption when being not zero Equipment electricity consumption.
5. the electric discharge management method of plug-in hybrid electric vehicle according to claim 4, which is characterized in that in above-mentioned step In rapid B, power battery (2) state includes the voltage of power battery (2), crest discharge power and electricity, in above-mentioned voltage, peak value When discharge power and electricity are all larger than its corresponding electric discharge preset value, judgement is unsatisfactory for triggering engine (14) and is powered, into Enter step C；When the voltage of power battery (2), crest discharge power and electricity, at least one is lower than corresponding electric discharge preset value, Entire car controller (1) controls engine (14) and motor (15) output direct current is driven to charge to power battery (2) and to air-conditioning System (5), dcdc converter (6) and bidirectional charger (4) power supply, meet engine (14) in power battery (2) state and stop After condition of power supply, entire car controller (1) controls engine (14) and shuts down, and power battery (2) powers alone, enters step C, sending out When motivation (14) drives motor (15) output direct current, C is not entered step.
6. the electric discharge management method of plug-in hybrid electric vehicle according to claim 5, which is characterized in that in above-mentioned step In rapid C, entire car controller (1) is equipped with the maximum of the maximum discharge power, dcdc converter (6) for allowing bidirectional charger (4) and uses The maximum electric power of electrical power and air-conditioning system (5), entire car controller (1) judge current power battery (2) crest discharge function Rate is greater than the maximum discharge power of bidirectional charger (4), the maximum electric power of dcdc converter (6) and air-conditioning system (5) When the sum of maximum electric power three certain value or when engine (14) is powered, entire car controller (1) is filled by limitation is two-way The reverse sequence that motor (4) discharge power and air-conditioning system (5) electric power reduce gradually releases power limit.
7. the electric discharge management method of plug-in hybrid electric vehicle according to claim 5, which is characterized in that entire car controller (1) bidirectional charger (4) discharge power, air-conditioning system (5) electric power and dcdc converter (6) electric power three are preset with The sum of corresponding engine (14) generated output table, entire car controller (1) it is real when engine (14) starting operation is powered When obtain bidirectional charger (4) discharge power, air-conditioning system (5) electric power and dcdc converter (6) electric power and calculate The sum of three, and generated output table is looked into according to the sum of three and obtains corresponding generated output, entire car controller (1) controls engine (14) the generated output power generation to obtain.
8. a kind of electric discharge management system of plug-in hybrid electric vehicle, including entire car controller (1), relay unit and relay The battery controller (3a) of device unit connection can limit the air-conditioner controller (5a) of air-conditioning system (5) electric power and can limit The charge and discharge controller (4a) of bidirectional charger (4) discharge power, which is characterized in that the charge and discharge controller (4a), battery control Device (3a) and air-conditioner controller (5a) are separately connected entire car controller (1), and the entire car controller (1) is also connected with detection unit (7), the entire car controller (1) receive charge and discharge controller (4a) send request for electricity when control battery controller (3a) make after Electric appliance unit by high pressure on vehicle, and by battery controller (3a) send signal behavior power battery (2) power when, vehicle control Device (1) processed calculates bidirectional charger (4) discharge power, air-conditioning system (5) electric power according to the signal that detection unit (7) is sent With the sum of the three of dcdc converter (6) electric power, and the sum of above-mentioned three be greater than current power battery (2) crest discharge When power, limitation the sum of bidirectional charger (4) discharge power and air-conditioning system (5) electric power are reduced, above-mentioned in limit procedure The sum of three is lower than current power battery (2) crest discharge power, and goes out DCDC transformation according to the signal determining of detection unit (7) When device (6) output power meets interior electrical equipment electricity consumption, bidirectional charger (4) discharge power and air-conditioning system (5) are not limited The sum of electric power continues to reduce.
9. the electric discharge management system of plug-in hybrid electric vehicle according to claim 8, which is characterized in that entire car controller (1) signal acquisition power battery (2) state sent by battery controller (3a), power battery (2) state includes power battery (2) voltage, crest discharge power and electricity, the entire car controller (1) are connected with engine controller (9) and motor control Device (10), when the voltage of power battery (2), crest discharge power and electricity, at least one is lower than corresponding electric discharge preset value, Entire car controller (1) send control signal to engine controller (9) control engine (14) movement, and send control signal to Electric machine controller (10) controls motor (15) output torque, meets engine (14) in power battery (2) state and stops power supply item After part, entire car controller (1) controls engine (14) and shuts down.
10. the electric discharge management system of plug-in hybrid electric vehicle according to claim 9, which is characterized in that the detection Unit (7) includes for obtaining the voltage sensor one (7a) of battery (8) voltage, for detecting air-conditioning system (5) electricity consumption electricity The voltage sensor two of pressure, the current sensor two for detecting air-conditioning system (5) electricity consumption electric current, for detecting bidirectional charger (4) voltage sensor three of discharge voltage, the current sensor three for detecting bidirectional charger (4) discharge current, for examining It surveys the voltage sensor four of dcdc converter (6) utilization voltage and the electric current for detecting dcdc converter (6) discharge current passes Sensor four.
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