WO2009067887A1 - Procédé de commande cc-cc pour véhicules électriques hybrides - Google Patents

Procédé de commande cc-cc pour véhicules électriques hybrides Download PDF

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Publication number
WO2009067887A1
WO2009067887A1 PCT/CN2008/072950 CN2008072950W WO2009067887A1 WO 2009067887 A1 WO2009067887 A1 WO 2009067887A1 CN 2008072950 W CN2008072950 W CN 2008072950W WO 2009067887 A1 WO2009067887 A1 WO 2009067887A1
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WO
WIPO (PCT)
Prior art keywords
converter
output voltage
control method
value
hybrid vehicle
Prior art date
Application number
PCT/CN2008/072950
Other languages
English (en)
Chinese (zh)
Inventor
Shangdong Yang
Original Assignee
Chery Automobile Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chery Automobile Co., Ltd. filed Critical Chery Automobile Co., Ltd.
Publication of WO2009067887A1 publication Critical patent/WO2009067887A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B60K6/485—Motor-assist type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W2050/0001—Details of the control system
    • B60W2050/0002—Automatic control, details of type of controller or control system architecture
    • B60W2050/0004—In digital systems, e.g. discrete-time systems involving sampling
    • B60W2050/0006—Digital architecture hierarchy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/086—Power
    • B60W2710/087—Power change rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/28—Fuel cells
    • B60W2710/285—Temperature
    • 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
    • Y02T10/62—Hybrid vehicles

Definitions

  • the invention belongs to the field of hybrid vehicle control, and realizes the control of the DC-DC converter of the hybrid vehicle.
  • Hybrid vehicles take into account the advantages of internal combustion engines and pure electric vehicles. They have the advantages of low fuel consumption, low emissions, and long mileage. They are currently a practical solution.
  • a parallel hybrid hybrid vehicle there are typically two electrical energy storage packages, a high voltage electrical energy storage package and a low voltage electrical energy storage package.
  • the high-voltage electrical energy storage package usually a high voltage battery (HV: High Voltage), mainly converts the kinetic energy of the vehicle into electrical energy when the vehicle is regeneratively braked, and then releases the electrical energy when the vehicle requires motor-assisted driving.
  • HV High Voltage
  • the low voltage electrical energy storage package usually a low voltage battery (LV: Low Voltage), mainly supplies power to the vehicle low voltage network.
  • a DC-DC converter is required between the high-voltage network and the low-voltage network.
  • the DC-DC converter is a DC voltage converter that is responsible for supplying the power of the high voltage network to the low voltage network.
  • the output voltage of the generator is set to a fixed value, and the change does not depend on the condition of the entire vehicle.
  • This control method can meet the power demand of the low-voltage network and maintain the balance of the power of the low-voltage battery. However, under certain operating conditions, it will affect the power efficiency of the vehicle.
  • the object of the present invention is to provide a DC-DC control method for a hybrid vehicle, which is particularly suitable for a coaxial parallel hybrid vehicle of an electric motor and an engine, which can improve the utilization efficiency of electric energy and make the whole vehicle Energy flow is more reasonable.
  • the present invention adopts the following technical solution: obtaining an operation mode of the hybrid vehicle according to a state of the integrated electric generator (ISG: Integrated Starter Generator); according to the hybrid vehicle
  • the hybrid controller HCU: Hybrid Control Unit
  • the hybrid controller controls an operating state of the DC-DC converter.
  • the present invention proposes a method for dynamically controlling a DC-DC converter according to the specific operating conditions of the hybrid vehicle. Based on the operating state of the ISG motor, a specific operating mode of the hybrid vehicle is determined. When the hybrid vehicle is operating in different working modes, such as an auxiliary driving mode, a generating mode, a regenerative braking mode, an idle stop mode, and a traditional working mode, the HCU controller determines to turn the DC on or off according to actual needs. -DC controller. ⁇ With the DC-DC control method of the hybrid vehicle of the present invention, the utilization efficiency of electric energy can be improved, the problems in the conventional control method can be solved, and the energy flow of the whole vehicle can be made more reasonable.
  • FIG. 1 is a system structural diagram of a hybrid vehicle according to the present invention.
  • FIG. 2 is a flow chart showing a control method of the DC-DC converter of the present invention when the hybrid vehicle is in the auxiliary drive mode;
  • FIG. 3 is a flow chart of a control method of the DC-DC converter of the present invention when the hybrid vehicle is in a power generation mode;
  • FIG. 4 is a flow chart of a control method of the DC-DC converter of the present invention when the ISG motor is in a regenerative braking mode;
  • Fig. 5 is a flow chart showing the control method of the DC-DC converter of the present invention when the hybrid vehicle is in the idle stop mode.
  • the hybrid vehicle DC-DC control method includes: acquiring an operation mode of the hybrid vehicle according to a state of the ISG motor; according to a working mode of the hybrid vehicle, The HCU controller controls the operating state of the DC-DC converter.
  • 1 is a system structural diagram of a hybrid vehicle according to the present invention.
  • the hybrid vehicle includes an engine management system (EMS: Engine Management System) controller 6, an HCU controller 7, and a battery management system (BMS) controller 8.
  • EMS Engine Management System
  • HCU controller 7 the HCU controller 7
  • BMS battery management system
  • the EMS controller 6, the HCU controller 7, and the BMS controller 8 are connected and communicated through a CAN (Controller Area Network) bus.
  • CAN Controller Area Network
  • the EMS controller 6 is an engine management system that is coupled to the engine 1.
  • the engine 1 and the ISG motor 2 are coaxially connected in parallel.
  • the engine 1 and the ISG motor 2 transmit power to the drive wheels through the clutch 3 and the transmission 4 for driving the wheels 5 to operate.
  • the HCU controller 7 is connected to an inverter 14 and a DC-DC converter 12.
  • the HCU controller 7 can drive the ISG motor 2 to be in a power generating or driving state by the inverter 14 according to the state of the entire vehicle.
  • the HCU controller 7 is also used to control the opening or closing of the DC-DC converter 12. When the DC-DC converter 12 is turned on, the HCU controller 7 can control the output voltage of the DC-DC converter 12.
  • the HCU controller 7 can also determine whether automatic parking is required according to the driver's intention and the vehicle state, and send a shutdown or restart command to the EMS controller 6 via the CAN bus.
  • the inverter 14 is connected to the ISG motor 2, the DC-DC converter 12, and the high voltage battery 13.
  • the inverter 14 When the inverter 14 is driven, the current from the high voltage battery 13 is converted into a three-phase current driven ISG motor 2.
  • the ISG motor 2 When the ISG motor 2 is in the power generation mode or the regenerative braking mode, the inverter 14 can rectify the three-phase current into two-phase currents, which are respectively transmitted to the high voltage battery 13 and the DC-DC converter 12.
  • the DC-DC converter 12 is connected to a high voltage battery 13, a low voltage battery 10, and a vehicle body load 9, respectively.
  • the DC-DC converter 12 is a connector for a high voltage network and a low voltage network, which converts the current of the high voltage network into a voltage current, charges the low voltage battery 10 or supplies power to the body load 9.
  • the low voltage battery 10 is a general vehicle low voltage battery.
  • the low voltage battery 10 provides power to the body load 9 when the inverter 14 outputs a lower voltage or is turned off. When the inverter 14 outputs a higher voltage, the low voltage battery 10 is in a state of charge, receiving power from the high voltage network.
  • the vehicle body load 9 refers to electrical appliances of the hybrid vehicle body, such as an air conditioner, an electric lamp, and the like.
  • the BMS controller 8 is a battery management system of a hybrid vehicle and is connected to the high voltage battery 13.
  • the BMS controller 8 is a high voltage voltage management system that can control the breaking of the high voltage battery 13.
  • the DC-DC control method for a hybrid vehicle uses an ISG motor 2 that integrates power generation and electric functions.
  • the operating mode of the hybrid vehicle is obtained by the state of the ISG motor 2.
  • the HCU controller 7 controls the operating state of the DC-DC converter 12 in accordance with the actual mode of operation in which the hybrid vehicle is located.
  • the HCU controller 7 When the hybrid vehicle is operating in an auxiliary drive mode or an idle stop mode, the HCU controller 7 turns off the DC-DC converter 12 to stop current flow from the high voltage network to the low voltage network.
  • the HCU controller 7 When the hybrid vehicle is operating in a power generation mode or a regenerative braking mode, the HCU controller 7 turns on the DC-DC converter 12 so that current can flow from the high voltage network to the low voltage network while adjusting the DC-DC The output voltage of the converter.
  • the DC-DC converter 12 can be turned on only when the entire vehicle of the hybrid vehicle satisfies the following conditions:
  • the high-voltage battery is in the connected state, and the high-voltage system is in the normal working state;
  • SOC state of charge
  • a flow chart of the DC-DC converter control method of the present invention is when the hybrid vehicle is in the auxiliary drive mode.
  • the auxiliary drive mode means that the engine 1 is mainly powered, and the ISG motor 2 assists the engine 1 to jointly drive the hybrid vehicle.
  • the power of the high voltage battery 13 should be used as much as possible for the drive of the hybrid vehicle.
  • the DC-DC converter 12 should be turned off, and current is not allowed to flow from the high voltage network to the low voltage network.
  • the power of the low voltage network is provided by the low voltage battery 10.
  • control method specifically includes the following steps:
  • Step S20 The control process starts
  • Step S21 determining whether the hybrid vehicle is in the auxiliary drive mode according to the working state of the ISG motor 2, if yes, proceeding to step S22, if no, proceeding to step S23;
  • Step S22 The HCU controller 7 sends an instruction to turn off the DC-DC converter, and turns off the DC-DC converter 12;
  • Step S23 End the control flow.
  • FIG. 3 a flow chart of a DC-DC converter control method according to the present invention is shown when the hybrid vehicle is in a power generation mode.
  • the HCU controller 7 When the hybrid vehicle is in the power generation mode, the HCU controller 7 is required to turn on the DC-DC converter 12 to enable the high voltage network current to flow to the low voltage network, thereby satisfying the power demand of the vehicle body load 9, while Charge the small battery.
  • the output voltage of the DC-DC converter 12 When the output voltage of the DC-DC converter 12 is controlled, the output voltage value U0 is corrected according to the power usage state of the vehicle body load 9, and the output voltage setting value U1 of the DC-DC converter 12 is obtained. .
  • control method specifically includes the following steps:
  • Step S30 The control process starts
  • Step S31 determining whether the hybrid vehicle is in the power generation mode according to the working state of the ISG motor 2, if yes, proceeding to step S32, if no, proceeding to step S37;
  • Step S32 According to the temperature of the low voltage battery 10, the output voltage value U0 of the DC-DC converter 12 is obtained by looking up the table;
  • Step S33 Calculating the power consumption P of the low voltage network;
  • the power consumption P of the low voltage network is equal to the product of the output voltage U0 of the DC-DC converter 12 and the output current 10 of the DC-DC converter. Expressed as:
  • Step S34 Obtain an output voltage correction value Lookup (P) of the DC-DC converter 12 according to the power consumption P of the low-voltage network, and obtain an output of the DC-DC converter 12 obtained by looking up the table.
  • the voltage value U0 is corrected to obtain the output voltage setting value U1 of the DC-DC converter 12;
  • the correction method is: adding the output voltage value U0 to the output voltage correction value Lookup (P) to obtain the output voltage setting value Ul. Expressed as:
  • Step S35 determining whether the DC-DC converter 12 is in an open state, and if so, adjusting an output voltage of the DC-DC converter 12 to the output voltage setting value, proceeding to step S37, and if no, proceeding to the step S36;
  • Step S36 The HCU controller 7 issues an instruction to turn on the DC-DC converter 12 to turn on the DC-DC converter 12;
  • the method further includes: the HCU controller 7 determining the vehicle state of the hybrid vehicle, when the vehicle state satisfies the condition for turning on the DC-DC converter 12
  • the HCU controller 7 sends an instruction to turn on the DC-DC converter 12 to the DC-DC converter.
  • Step S37 End the control flow.
  • FIG. 4 a flow chart of the control method of the DC-DC converter of the present invention when the ISG motor is in the regenerative braking mode.
  • the hybrid vehicle system can participate in braking through the ISG motor 2, thereby recovering part of the braking energy, and converting the kinetic energy of the hybrid vehicle into electrical energy stored in The high voltage battery 13 and the low voltage battery 10 are included.
  • the DC-DC converter 12 should be turned on while its output voltage is adjusted to the maximum.
  • control method specifically includes the following steps:
  • Step S40 The control process starts
  • Step S41 determining, according to the working state of the ISG motor 2, whether the hybrid vehicle is In the regenerative braking mode, if yes, proceed to step S42, if no, proceed to step S46;
  • Step S42 According to the temperature of the small battery, the output voltage value U0 of the DC-DC converter 12 is obtained by looking up the table;
  • Step S43 Correcting the output voltage value U0 to obtain an output voltage setting value U1 of the DC-DC converter 12;
  • the correction method is: adding the output voltage value U0 to the set output voltage correction value U2 to obtain the output voltage setting value Ul. Expressed as:
  • Step S44 determining whether the DC-DC converter 12 is in an open state, if yes, adjusting the output voltage of the DC-DC converter 12 to set the output voltage value, proceeds to step S46; if not, proceeds to step S45;
  • Step S45 The HCU controller 7 sends an instruction to turn on the DC-DC converter 12 to turn on the DC-DC converter 12;
  • the method further includes: the HCU controller 7 determining the vehicle state of the hybrid vehicle, when the vehicle state satisfies the condition for turning on the DC-DC converter 12
  • the HCU controller 7 sends an instruction to turn on the DC-DC converter 12 to the DC-DC converter.
  • Step S46 End the control process.
  • the idle stop mode means that when the HCU controller 7 determines that the driver has a stop intention, the HCU controller 7 issues an instruction that the engine 1 is stopped, so that the engine 1 is in a stop state; when the HCU When the controller 7 determines that the driver has an intention to start, the HCU controller 7 issues a request for automatic restart to put the engine 1 in a normal operating state.
  • the power conversion path may be: from the high voltage battery 13 to the low voltage battery 10, and then to the body load 9 to use electricity.
  • the DC-DC converter 12 should be turned off to prevent the conversion efficiency of electric energy from becoming low.
  • the control method specifically includes the following steps:
  • Step S50 The control process starts
  • Step S51 determining, according to the working state of the ISG motor 2, that the hybrid vehicle is in an idle stop mode, if yes, proceeding to step S52, and if no, proceeding to step S53;
  • Step S52 Turn off the DC-DC converter
  • Step S53 End the control process.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

La présente invention concerne un procédé de commande CC-CC pour véhicules électriques hybrides. Le procédé comprend les étapes consistant à : déterminer les modes de fonctionnement du véhicule électrique hybride en fonction de l'état d'un ISG (2) ; et un dispositif de commande HCU (7) commande la mise sous et hors tension d'un convertisseur CC-CC (12) selon les modes de fonctionnement.
PCT/CN2008/072950 2007-11-07 2008-11-05 Procédé de commande cc-cc pour véhicules électriques hybrides WO2009067887A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710135384.8 2007-11-07
CN2007101353848A CN101207331B (zh) 2007-11-07 2007-11-07 一种混合动力汽车dc-dc控制方法

Publications (1)

Publication Number Publication Date
WO2009067887A1 true WO2009067887A1 (fr) 2009-06-04

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Application Number Title Priority Date Filing Date
PCT/CN2008/072950 WO2009067887A1 (fr) 2007-11-07 2008-11-05 Procédé de commande cc-cc pour véhicules électriques hybrides

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CN (1) CN101207331B (fr)
WO (1) WO2009067887A1 (fr)

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CN113147631B (zh) * 2021-05-06 2023-03-31 重庆金康赛力斯新能源汽车设计院有限公司 一种低压电压变换器的输出功率确定方法及相关设备
CN113415163A (zh) * 2021-07-30 2021-09-21 东风商用车有限公司 混合动力汽车低压供电系统、控制方法及混合动力汽车
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