CN112606713A - Motor driving and lithium battery charging integrated method for hybrid electric vehicle - Google Patents

Motor driving and lithium battery charging integrated method for hybrid electric vehicle Download PDF

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Publication number
CN112606713A
CN112606713A CN202011434742.7A CN202011434742A CN112606713A CN 112606713 A CN112606713 A CN 112606713A CN 202011434742 A CN202011434742 A CN 202011434742A CN 112606713 A CN112606713 A CN 112606713A
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China
Prior art keywords
lithium battery
switch
charging
contactor
power supply
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Inventor
陈静
田韶鹏
肖纯
王宇宁
杨灿
秦国峰
李志华
郭正阳
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Foshan Xianhu Laboratory
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Foshan Xianhu Laboratory
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Priority to CN202011434742.7A priority Critical patent/CN112606713A/en
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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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/75—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using propulsion power supplied by both fuel cells and batteries
    • 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
    • B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • 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
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • 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
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • 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
    • Y02T10/64—Electric machine technologies in electromobility
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

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

Abstract

The invention provides a motor driving and lithium battery charging integrated method of a hybrid electric vehicle, which is realized by adopting a motor driving and lithium battery charging integrated device consisting of a control system, a motor driving subsystem and a lithium battery charging subsystem. The motor driving subsystem converts direct current output by the hydrogen fuel cell system, or direct current output by the lithium battery, or direct current output by the combination of the two into adjustable alternating current to drive the permanent magnet synchronous motor so as to drive the automobile connected with the permanent magnet synchronous motor to run; the lithium battery charging subsystem rectifies the alternating current into adjustable direct current or the direct current output by the hydrogen fuel cell system to charge the lithium battery; the main controller in the control system controls 2 subsystems to complete the safe and efficient operation of permanent magnet synchronous motor driving and lithium battery charging through a coordination control strategy.

Description

Motor driving and lithium battery charging integrated method for hybrid electric vehicle
Technical Field
The invention belongs to the technical field of motor driving and power battery charging, and particularly relates to a motor driving and lithium battery charging integrated method for a hybrid electric vehicle.
Background
At present, with the increase of the number of global automobiles, the emission pollution of urban automobiles is increasingly serious, and the contradiction between supply and demand of traditional automobile fuel is more prominent. The hybrid vehicle of hydrogen fuel cell-lithium battery is one of electric vehicles, and is called ultimate environmental protection vehicle in the industry. Along with the popularization of hydrogen fuel cell-lithium battery hybrid electric vehicles, the problem of difficult charging of electric vehicles is increasingly prominent, a lithium battery charging system and a motor driving system are mutually independent, and the two systems respectively have own main control chip, a working circuit, a controller shell, a wire harness and the like. The manufacturing cost of the two is high, and the respective installation will cause space waste.
The charging system using the motor driving system proposed in chinese patent document "201910590360.4" integrates an external three-phase ac charging system on the motor driving system, replaces the original charging system, saves the installation space, and reduces the manufacturing cost. Chinese patent document "202010511679.6" proposes a controller for both battery charging and motor driving, which integrates a motor controller and a battery charger, and has the functions of charging the battery, obtaining energy from the battery, and controlling the motor. However, the above patent can not control the driving of the hybrid vehicle, and can not realize the function of charging the hydrogen fuel cell when the motor is running or stopped, which causes the waste of energy of the hydrogen fuel cell.
In view of the above problems, a method for integrating motor driving and lithium battery charging of a hybrid vehicle is provided.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the method integrates the functions of motor driving and lithium battery charging, realizes the integration of the motor driving and the lithium battery charging of the hydrogen fuel cell-lithium battery hybrid electric vehicle, and ensures the safe and efficient operation of permanent magnet synchronous motor driving and lithium battery charging.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
in a first aspect, an embodiment of the present invention provides a method for integrating motor driving and lithium battery charging of a hybrid electric vehicle, where the method includes: the motor driving subsystem realizes the driving of the permanent magnet synchronous motor, and the lithium battery charging subsystem realizes the charging of the lithium battery;
(1) a motor drive subsystem: the system consists of a motor driving subsystem, a power supply subsystem and a control subsystem, wherein the motor driving subsystem consists of a hydrogen fuel cell system, a lithium battery, a main circuit, a motor driving control module in the control system, a permanent magnet synchronous motor, a first switch, a second contactor, a first direct current interface, a second direct current interface and an alternating current output interface; the hydrogen fuel cell system consists of a hydrogen fuel electric pile and a DC/DC converter, and the driving method for realizing the permanent magnet synchronous motor comprises the following steps:
firstly, acquiring acceleration of a pedal and running condition information of a vehicle in real time, and selecting one of 3 power supply modes of 'hydrogen fuel cell power supply, lithium battery power supply and hybrid power supply' as a direct current power supply of a motor driving subsystem; when the 'power supply of the hydrogen fuel cell' is selected, the first switch is closed, the second switch is opened, the first contactor is opened, the second contactor is closed, when the 'power supply of the lithium battery' is selected, the first switch is opened, the second switch is closed, the first contactor is opened, and the second contactor is closed; when the hybrid power supply is needed, the hybrid power supply system operates, the first switch and the second switch are both closed, the second contactor is closed, and the first contactor is disconnected; when parking is needed, the first switch, the second switch, the first contactor and the second contactor are all disconnected;
then, under the action of the direct current power supply of the motor driving subsystem, a system consisting of a main circuit, a motor driving control module in the control system and the permanent magnet synchronous motor converts direct current into adjustable alternating current according to the command of the main controller to drive the permanent magnet synchronous motor, so as to drive the automobile connected with the permanent magnet synchronous motor to run.
(2) The lithium battery charging subsystem: the lithium battery charging subsystem is composed of a three-phase alternating current power supply, an alternating current input interface, a hydrogen fuel cell system, a main circuit, a charging control module in the control system, a first contactor, a first switch and a second switch, and the lithium battery charging method comprises the following steps:
charging an alternating current power supply: when the automobile stops running and the electric quantity of the lithium battery is lower than a threshold value, a system consisting of a three-phase alternating-current power supply, an alternating-current input interface, a main circuit, a charging control module in a control system, a first contactor and a second switch realizes intelligent charging of the lithium battery;
in the running process of the automobile, when the voltage of direct current output by the hydrogen fuel cell system is higher than the voltage of a lithium battery and the electric quantity of the lithium battery is lower than a threshold value, the intelligent charging of the lithium battery is realized by a system consisting of the hydrogen fuel cell system, a first switch, a second switch and a charging module in a control system;
when the automobile brake needs energy feedback in the running process of the automobile and the electric quantity of the lithium battery is lower than a threshold value, a system consisting of a permanent magnet synchronous motor, a second contactor, a main circuit, a second switch and a charging module in a control system realizes intelligent charging of the lithium battery;
the coordination control between the driving method of the permanent magnet synchronous motor and the lithium battery charging method is realized by a main controller in a control system; the operation of permanent magnet synchronous motor driving and lithium battery charging of the hybrid electric vehicle is realized through the steps.
Furthermore, the control system is composed of a main controller, a motor drive control module, a charging control module and other modules, and is integrated on a PCB, and the control system is provided with 4 CPUs which respectively correspond to the main controller, the motor drive control module, the charging control module and the other modules.
Further, the other modules comprise a processing module, a communication module, a fault module and an I/O module, wherein the processing module is used for carrying out quantitative processing and filtering on the acceleration of the pedal and the running condition information of the automobile, and processed signals are used by the main controller; the communication module is a tool for the main controller to contact with the outside, and is used for receiving an outside signal and reporting the states of the lithium battery and the main controller to the outside; the fault module is used for detecting possible faults in real time, taking measures to remedy the faults and informing a user; the on-off of the first switch and the second switch and the on-off of the first contactor and the second contactor are realized by the processing of the I/O module.
Furthermore, the motor drive and lithium battery charging integrated device consisting of the control system, the motor drive subsystem and the lithium battery charging subsystem is integrated, and a case shell, a plug and a wire harness are adopted. The hydrogen fuel cell-lithium battery hybrid electric vehicle has the advantages of reducing the manufacturing cost ratio, reducing the weight and the installation space, being convenient to install and being applicable to hydrogen fuel cell-lithium battery hybrid electric vehicles.
Further, the method can be applied to a hydrogen fuel cell-lithium battery hybrid electric vehicle.
The invention aims at the popularization of a hydrogen fuel cell-lithium battery hybrid electric vehicle, the problems of high manufacturing cost, waste of installation space, poor safety, low efficiency and the like because a lithium battery charging system and a motor driving system are mutually independent, and mainly has the following advantages:
(1) the topological structure is innovative, and in order to realize the high integration of the motor drive and the lithium battery charging function, a main circuit is adopted, the inverted DC/AC and the three-phase AC power supply of the motor drive are realized in a time-sharing mode, and the lithium battery is charged through the rectified AC/DC, so that the design is simplified.
(2) A coordination control strategy is provided, energy required by motor driving can be flexibly distributed according to the operation condition of the fuel cell-lithium battery hybrid electric vehicle, one of 'hydrogen fuel cell power supply', 'lithium battery power supply' and 'hybrid power supply' can be selected, and a charging power supply mode 'one of a three-phase alternating current power supply which is subjected to rectification power supply, a hydrogen fuel cell system power supply when the motor operates and a hydrogen fuel cell system power supply when the vehicle stops' can be selected according to requirements, so that the efficiency and the cruising ability of the vehicle are improved.
(3) The technical innovation is realized, and the shell, the plug and the wiring harness are adopted, so that the lithium battery charging system has two functions of charging the lithium battery, acquiring energy from the lithium battery or the hydrogen fuel battery system and driving the motor, the manufacturing cost ratio is reduced, the weight and the installation space are reduced, and the installation is convenient.
(4) The invention is not only suitable for fuel cell-lithium cell hybrid vehicles, but also suitable for vehicles which use battery type energy storage energy to supply power to a motor after inversion and use a charger to charge an energy storage device.
Drawings
Fig. 1 is a schematic structural diagram of an integrated device for motor drive and lithium battery charging of a hybrid electric vehicle according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a motor driving time circuit of a motor driving and lithium battery charging integrated device of a hybrid electric vehicle according to an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a lithium battery charging process of an integrated device of motor driving and lithium battery charging of a hybrid electric vehicle according to an embodiment of the present invention.
Description of the drawings: 1. a hydrogen fuel cell system; 2. a lithium battery; 3. a main circuit; 4. a control system; 5. a permanent magnet synchronous motor; 6. a first direct current interface; 7. a second DC interface; 8. an AC output interface; 9. an alternating current input interface; 10. a three-phase AC power supply; 1-1. hydrogen fuel cell stack; 1-2. a DC/DC converter; 4-1, a main controller; 4-2, driving a control module by a motor; 4-3, a charging control module; 4-4. a processing module; 4-5, a communication module; 4-6, a fault module; I/O module.
Detailed Description
The present invention will be further described with reference to the following examples and drawings, but the present invention is not limited thereto.
The invention integrates the functions of motor driving and lithium battery charging, realizes the integration of the motor driving and the lithium battery charging of the hydrogen fuel cell-lithium battery hybrid electric vehicle, and ensures the safe and efficient operation of the permanent magnet synchronous motor driving and the lithium battery charging.
The invention provides a motor driving and lithium battery charging integrated method of a hybrid electric vehicle, which is realized by adopting a motor driving and lithium battery charging integrated device consisting of a control system, a motor driving subsystem and a lithium battery charging subsystem. The motor driving subsystem converts direct current output by the hydrogen fuel cell system or direct current output by the lithium battery or direct current output by the combination of the direct current and the direct current into adjustable alternating current to drive the permanent magnet synchronous motor to drive an automobile connected with the permanent magnet synchronous motor to run; the lithium battery charging subsystem rectifies the alternating current into adjustable direct current or the direct current output by the hydrogen fuel cell system to charge the lithium battery; a main controller in the control system controls 2 subsystems through a coordination control strategy to complete safe and efficient operation of permanent magnet synchronous motor driving and lithium battery charging.
A method for integrating motor driving and lithium battery charging of a hybrid electric vehicle, the method comprising: the motor driving subsystem realizes the driving of the permanent magnet synchronous motor, and the lithium battery charging subsystem realizes the charging of the lithium battery;
(1) a motor drive subsystem: the motor driving subsystem consists of a hydrogen fuel cell system, a lithium battery, a main circuit, a motor driving control module in the control system, a permanent magnet synchronous motor, a first switch, a second contactor, a first direct current interface, a second direct current interface and an alternating current output interface; the hydrogen fuel cell system consists of a hydrogen fuel electric pile and a DC/DC converter, and the driving method for realizing the permanent magnet synchronous motor comprises the following steps:
firstly, acquiring acceleration of a pedal and running condition information of an automobile in real time, and selecting one of 3 power supply modes of 'hydrogen fuel cell power supply, lithium battery power supply and hybrid power supply' as a direct current power supply of a motor driving subsystem; when the 'power supply of the hydrogen fuel cell' is selected, the first switch is closed, the second switch is opened, the first contactor is opened, the second contactor is closed, when the 'power supply of the lithium battery' is selected, the first switch is opened, the second switch is closed, the first contactor is opened, and the second contactor is closed; when the hybrid power supply is needed, the hybrid power supply system operates, the first switch and the second switch are both closed, the second contactor is closed, and the first contactor is disconnected; when parking is needed, the first switch, the second switch, the first contactor and the second contactor are all disconnected;
then, under the action of the direct current power supply of the motor driving subsystem, a system consisting of a main circuit, a motor driving control module in the control system and the permanent magnet synchronous motor converts direct current into adjustable alternating current according to the command of the main controller to drive the permanent magnet synchronous motor, so as to drive the automobile connected with the permanent magnet synchronous motor to run.
(2) The lithium battery charging subsystem: the lithium battery charging subsystem is composed of a three-phase alternating current power supply, an alternating current input interface, a hydrogen fuel cell system, a main circuit, a charging control module in the control system, a first contactor, a first switch and a second switch, and the lithium battery charging method comprises the following steps:
charging an alternating current power supply: when the automobile stops running and the electric quantity of the lithium battery is lower than a threshold value, a system consisting of a three-phase alternating-current power supply, an alternating-current input interface, a main circuit, a charging control module in a control system, a first contactor and a second switch realizes intelligent charging of the lithium battery;
in the running process of the automobile, when the voltage of direct current output by the hydrogen fuel cell system is higher than the voltage of a lithium battery and the electric quantity of the lithium battery is lower than a threshold value, the intelligent charging of the lithium battery is realized by a system consisting of the hydrogen fuel cell system, a first switch, a second switch and a charging module in a control system;
when the automobile brake needs energy feedback in the running process of the automobile and the electric quantity of the lithium battery is lower than a threshold value, a system consisting of a permanent magnet synchronous motor, a second contactor, a main circuit, a second switch and a charging module in a control system realizes intelligent charging of the lithium battery;
the coordination control between the driving method of the permanent magnet synchronous motor and the lithium battery charging method is realized by a main controller in a control system; the operation of permanent magnet synchronous motor driving and lithium battery charging of the hybrid electric vehicle is realized through the steps.
Furthermore, the control system is composed of a main controller, a motor drive control module, a charging control module and other modules, and is integrated on a PCB, and the control system is provided with 4 CPUs which respectively correspond to the main controller, the motor drive control module, the charging control module and the other modules.
Further, the other modules comprise a processing module, a communication module, a fault module and an I/O module, wherein the processing module is used for carrying out quantitative processing and filtering on the acceleration of the pedal and the running condition information of the automobile, and processed signals are used by the main controller; the communication module is a tool for the main controller to contact with the outside, and is used for receiving an outside signal and reporting the states of the lithium battery and the main controller to the outside; the fault module is used for detecting possible faults in real time, taking measures to remedy the faults and informing a user; the on-off of the first switch and the second switch and the on-off of the first contactor and the second contactor are realized by the processing of the I/O module.
Furthermore, the motor drive and lithium battery charging integrated device consisting of the control system, the motor drive subsystem and the lithium battery charging subsystem is integrated, and a case shell, a plug and a wire harness are adopted. The hydrogen fuel cell-lithium battery hybrid electric vehicle has the advantages of reducing the manufacturing cost ratio, reducing the weight and the installation space, being convenient to install and being applicable to hydrogen fuel cell-lithium battery hybrid electric vehicles.
Further, the method can be applied to a hydrogen fuel cell-lithium battery hybrid electric vehicle.
The invention provides a motor driving and lithium battery charging integration method for a hydrogen fuel cell-lithium battery hybrid electric vehicle, which can be realized by a motor driving and lithium battery charging integration device, and the structure of the device is shown in figure 1: the system is composed of a motor driving subsystem, a lithium battery charging subsystem and a control system, wherein a main controller in the control system controls 2 subsystems through a coordination control strategy to complete safe and efficient operation of permanent magnet synchronous motor driving and lithium battery charging.
The motor driving subsystem is composed of a hydrogen fuel cell system 1, a lithium battery 2, a main circuit 3, a control system 4, a permanent magnet synchronous motor 5, a switch K1 (namely a first switch), a switch K2 (namely a second switch), a contactor KM2 (namely a second contactor), a direct current interface 6 (namely a first direct current interface), a direct current interface 7 (namely a second direct interface) and an alternating current output interface 8, wherein the hydrogen fuel cell system 1 is composed of a hydrogen fuel cell stack 1-1 and a DC/DC converter 1-2 to form the motor driving subsystem. The lithium battery charging subsystem is composed of a three-phase alternating current power supply 10, an alternating current input interface 9, a hydrogen fuel battery system 1, a main circuit 3, a charging control module 4-3 in a control system, a contactor KM1 (namely a first contactor), a switch K1 and a switch K2.
The hydrogen fuel pile 1-1 generates direct current, the output positive pole end of the hydrogen fuel pile is connected with one end of a DC/DC converter 1-2, the other end of the DC/DC converter 1-2 is connected with a direct current interface 6, the positive pole end (U1+) of the direct current interface 6 is connected with the direct current positive pole end (U +) of a main circuit through a switch K1, and the negative pole end (U1-) of the direct current interface 6 is directly connected with the direct current negative pole end (U-) of the main circuit; the output of the lithium battery is connected with a direct current interface 7, the positive terminal (U2+) of the direct current interface 7 is connected with the direct current positive terminal (U +) of the main circuit through a switch K2, and the negative terminal (U2-) of the direct current interface 7 is directly connected with the direct current negative terminal (U-) of the main circuit; the alternating current end of the main circuit 3 is connected with a contactor KM2, and the other end of the KM2 is connected with a permanent magnet synchronous motor 5 through an alternating current output interface 8; the three-phase alternating current power supply 10 is connected with a contactor KM1 through an alternating current input interface 8, and the other end of the contactor KM1 is connected with the alternating current end of the main circuit.
And the motor driving subsystem and the lithium battery charging subsystem share the main circuit 3 in a time sharing manner. The bridge circuit comprises a first bridge arm connected with a power device V1 and a power device V4, a second bridge arm connected with a power device V3 and a power device V6, and a third bridge arm connected with a power device V5 and a power device V2; the middle points of the three bridge arms are used as the alternating current ends of the main circuit 3, and the two ends of the three bridge arms are led out after being connected in parallel and are used as the direct current ends of the main circuit 3; the V1-V6 are IGBT tubes, the D1-D6 are diodes, and the D1-D6 are used for protecting the V1-V6.
In the motor driving subsystem, a contactor KM1 is opened, a contactor KM2 is closed, the alternating current end of a main circuit is connected with a contactor KM2, and then is connected with a permanent magnet synchronous motor 5 through an alternating current output interface 8, as shown in fig. 2.
In the lithium battery charging subsystem, a contactor KM2 is opened, a contactor KM1 is closed, a three-phase alternating current power supply 10 is connected with a contactor KM1 through an alternating current input interface 9, and the other end of the contactor KM1 is connected with an alternating current end of a main circuit 3, as shown in FIG. 3.
The control system 4 is composed of a main controller 4-1, a motor drive control module 4-2, a charging control module 4-3 and other modules, wherein the other modules comprise a processing module 4-4, a communication module 4-5, a fault module 4-6, an I/O module 4-7 and the like.
The coordination control strategy is as follows: let SF11, SF12, SF13, and SF14 respectively represent 4 power supply modes of the motor drive subsystem, namely: hydrogen fuel cell power supply, lithium battery power supply, hybrid power supply and unpowered power supply; let SF21, SF22, and SF23 respectively represent 3 power supply modes of the lithium battery charging subsystem, namely: the three-phase alternating current power supply is supplied with power through rectification, the hydrogen fuel cell system supplies power when the motor runs, and the hydrogen fuel cell system supplies power when the motor stops; the value of 1 indicates valid, and 0 indicates invalid, which are set by the main controller in the control system. The coordination control strategy is realized by a main controller, and specifically comprises the following steps:
(1) starting and initializing;
starting a control system; variables SF11, SF12, SF13, SF14, and SF21, SF22, SF23 are reset, i.e., all have a value of "0".
(2) Coordinated control during the operation of the motor;
one of 4 power supply modes of a motor driving subsystem, namely hydrogen fuel cell power supply, lithium battery power supply, hybrid power supply and non-power supply can be selected according to requirements. When the ' hydrogen fuel cell power supply ' is selected, the operation is carried out, the switch K1 is closed, the switch K2 is opened, the contactor KM1 is opened, the contactor KM2 is closed, and SF11 is 1 '; when the ' lithium battery power supply ' is selected, the switch K1 is opened, the switch K2 is closed, the contactor KM1 is opened, the contactor KM2 is closed, and SF12 is 1 '; when the hybrid power supply is needed, the hybrid power supply system runs, the switch K1 and the switch K2 are both closed, the contactor KM2 is closed, and the contactor KM1 is opened; SF13 is then "1"; when parking is required, the switch K1, the switch K2, the contactor KM1 and the contactor KM2 are all opened.
(3) Coordination control during lithium battery charging;
the charging power supply mode can be selected according to the requirement, namely, the three-phase alternating current power supply is used for supplying power through rectification, the hydrogen fuel cell system is used for supplying power when the motor runs, and the hydrogen fuel cell system is used for supplying power when the motor stops. When the three-phase alternating current power supply is selected to be supplied with power through rectification, the switch K1 is switched off, the switch K2 is switched on, the contactor KM1 is switched on, the contactor KM2 is switched off, and SF21 is 1; when the ' power supply of a hydrogen fuel cell system during the operation of the motor ' is needed, the switch K1 and the switch K2 are both closed, the contactor KM1 is disconnected, the contactor KM2 is closed, and SF22 is 1 ' at the moment; when the power supply of the hydrogen fuel cell system at parking is needed, the switch K1 and the switch K2 are closed, the contactor KM1 and the contactor KM2 are opened, and SF23 is 1.
The motor driving control module works according to the mode that the median value of SF1i (i is 1,2,3 and 4) is 1, and the driving voltage and the driving current are adjusted according to the command of the main controller. The pulse width PWM method is used for achieving the purpose of changing direct current into adjustable alternating current (inverting DC/AC) by adjusting the period and the duty ratio of PWM. The motor is driven by the alternating current to rotate, and then the automobile connected with the permanent magnet synchronous motor is driven to run. Inversion control techniques such as a spatial vector method are well known and will not be described herein.
The charge control module operates according to the mode that the median value of SF2i (i is 1,2,3) is "1". When SF21 is equal to "1", the purpose of changing the input alternating current into adjustable direct current (rectified AC/DC) can be achieved by adjusting the period and duty ratio of PWM. When the voltage of this direct current is higher than the voltage of the lithium battery, it is charged. In the same battery state, the higher the voltage of the rectified dc power, the larger the charging current. When SF22 is equal to "1" or when SF23 is equal to "1", the voltage of the direct current output from the hydrogen fuel cell system is higher than that of the lithium battery, and it is charged.
The processing module 4-4 in the control system is used for carrying out quantization processing and filtering on all input signals, and the processed signals are used by the controller; the communication module 4-5 is a tool for communicating the controller with the outside, and is used for receiving an outside signal and reporting the battery state and the controller state to the outside; the fault module 4-6 is used for detecting possible faults in real time, taking measures to remedy and informing a user; the I/O modules 4-7 process switching value input/output signals.
In summary, the present invention integrates the motor driving and lithium battery charging integrated device composed of the control system, the motor driving subsystem and the lithium battery charging subsystem, and adopts a chassis housing, a plug and a wiring harness to reduce the manufacturing cost ratio, reduce the weight and the installation space, facilitate the installation, and can be applied to the hydrogen fuel cell-lithium battery hybrid electric vehicle.
The above detailed description is provided for the integrated method of motor driving and lithium battery charging of the hybrid electric vehicle, and the above embodiment is only used to help understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims (5)

1. A motor driving and lithium battery charging integrated method of a hybrid electric vehicle is characterized in that: the method comprises the following steps: the motor driving subsystem realizes the driving of the permanent magnet synchronous motor, and the lithium battery charging subsystem realizes the charging of the lithium battery;
(1) a motor drive subsystem: the motor driving subsystem consists of a hydrogen fuel cell system, a lithium battery, a main circuit, a motor driving control module in the control system, a permanent magnet synchronous motor, a first switch, a second contactor, a first direct current interface, a second direct current interface and an alternating current output interface; the hydrogen fuel cell system consists of a hydrogen fuel electric pile and a DC/DC converter, and the driving method for realizing the permanent magnet synchronous motor comprises the following steps:
firstly, acquiring acceleration of a pedal and running condition information of an automobile in real time, and selecting one of 3 power supply modes of 'hydrogen fuel cell power supply, lithium battery power supply and hybrid power supply' as a direct current power supply of a motor driving subsystem; when the 'power supply of the hydrogen fuel cell' is selected, the first switch is closed, the second switch is opened, the first contactor is opened, the second contactor is closed, when the 'power supply of the lithium battery' is selected, the first switch is opened, the second switch is closed, the first contactor is opened, and the second contactor is closed; when the hybrid power supply is needed, the hybrid power supply system operates, the first switch and the second switch are both closed, the second contactor is closed, and the first contactor is disconnected; when parking is needed, the first switch, the second switch, the first contactor and the second contactor are all disconnected;
then, under the action of a direct current power supply of the motor driving subsystem, a system consisting of a main circuit, a motor driving control module in the control system and the permanent magnet synchronous motor converts direct current into adjustable alternating current according to a command of a main controller in the control system to drive the permanent magnet synchronous motor and drive an automobile connected with the permanent magnet synchronous motor to run;
(2) the lithium battery charging subsystem: the lithium battery charging subsystem is composed of a three-phase alternating current power supply, an alternating current input interface, a hydrogen fuel cell system, a main circuit, a charging control module in the control system, a first contactor, a first switch and a second switch, and the lithium battery charging method comprises the following steps:
charging an alternating current power supply: when the automobile stops running and the electric quantity of the lithium battery is lower than a threshold value, a system consisting of a three-phase alternating-current power supply, an alternating-current input interface, a main circuit, a charging control module in a control system, a first contactor and a second switch realizes intelligent charging of the lithium battery;
in the running process of the automobile, when the voltage of direct current output by the hydrogen fuel cell system is higher than the voltage of a lithium battery and the electric quantity of the lithium battery is lower than a threshold value, the intelligent charging of the lithium battery is realized by a system consisting of the hydrogen fuel cell system, a first switch, a second switch and a charging module in a control system;
when the automobile brake needs energy feedback in the running process of the automobile and the electric quantity of the lithium battery is lower than a threshold value, a system consisting of a permanent magnet synchronous motor, a second contactor, a main circuit, a second switch and a charging module in a control system realizes intelligent charging of the lithium battery;
the coordination control between the driving method of the permanent magnet synchronous motor and the lithium battery charging method is realized by a main controller in a control system; the operation of permanent magnet synchronous motor driving and lithium battery charging of the hybrid electric vehicle is realized through the steps.
2. The method of claim 1, wherein the method comprises the steps of: the control system is composed of a main controller, a motor drive control module, a charging control module and other modules, and is integrated on a PCB, and the control system is provided with 4 CPUs which respectively correspond to the main controller, the motor drive control module, the charging control module and the other modules.
3. The method as claimed in claim 2, wherein the other modules include a processing module, a communication module, a fault module and an I/O module, the processing module is configured to perform quantization processing and filtering on the acceleration of the pedal and the operating condition information of the vehicle, and the processed signal is provided to the main controller; the communication module is a tool for the main controller to contact with the outside, and is used for receiving an outside signal and reporting the states of the lithium battery and the main controller to the outside; the fault module is used for detecting possible faults in real time, taking measures to remedy the faults and informing a user; the on-off of the first switch and the second switch and the on-off of the first contactor and the second contactor are realized by the processing of the I/O module.
4. The method as claimed in any one of claims 1 to 3, wherein the motor drive and lithium battery charging integrated device comprising the control system, the motor drive subsystem and the lithium battery charging subsystem is integrated by using a chassis housing, a plug and a harness.
5. The method of integrating motor driving and lithium battery charging for a hybrid vehicle according to any one of claims 1 to 4, wherein the method is applicable to a hydrogen fuel cell-lithium battery hybrid vehicle.
CN202011434742.7A 2020-12-10 2020-12-10 Motor driving and lithium battery charging integrated method for hybrid electric vehicle Pending CN112606713A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114312492A (en) * 2022-03-03 2022-04-12 杭叉集团股份有限公司 Hydrogen fuel cell forklift and power-on and power-off control system thereof
CN114368297A (en) * 2022-01-29 2022-04-19 中车大同电力机车有限公司 Hydrogen fuel cell hybrid locomotive charging device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114368297A (en) * 2022-01-29 2022-04-19 中车大同电力机车有限公司 Hydrogen fuel cell hybrid locomotive charging device
CN114312492A (en) * 2022-03-03 2022-04-12 杭叉集团股份有限公司 Hydrogen fuel cell forklift and power-on and power-off control system thereof
CN114312492B (en) * 2022-03-03 2022-06-14 杭叉集团股份有限公司 Hydrogen fuel cell forklift and power-on and power-off control system thereof

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