CN111319476A - Four-drive motor system of hydrogen fuel cell electric automobile and control method thereof - Google Patents

Four-drive motor system of hydrogen fuel cell electric automobile and control method thereof Download PDF

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Publication number
CN111319476A
CN111319476A CN202010210166.1A CN202010210166A CN111319476A CN 111319476 A CN111319476 A CN 111319476A CN 202010210166 A CN202010210166 A CN 202010210166A CN 111319476 A CN111319476 A CN 111319476A
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CN
China
Prior art keywords
motor
fuel cell
drive motor
gearbox
cell electric
Prior art date
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Withdrawn
Application number
CN202010210166.1A
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Chinese (zh)
Inventor
舒月洪
郝义国
陈华明
程飞
朱宁伟
毛江龙
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Wuhan Grove Hydrogen Energy Automobile Co Ltd
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Wuhan Grove Hydrogen Energy Automobile Co Ltd
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Publication date
Application filed by Wuhan Grove Hydrogen Energy Automobile Co Ltd filed Critical Wuhan Grove Hydrogen Energy Automobile Co Ltd
Priority to CN202010210166.1A priority Critical patent/CN111319476A/en
Publication of CN111319476A publication Critical patent/CN111319476A/en
Withdrawn legal-status Critical Current

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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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • 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
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/063—Arrangement of tanks
    • B60K15/067—Mounting of tanks
    • B60K15/07—Mounting of tanks of gas tanks
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
    • 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
    • B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
    • 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
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/10—Dynamic electric regenerative braking
    • 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
    • Y02T10/72—Electric energy management 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
    • 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)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a hydrogen fuel cell electric vehicle dual-drive motor system and a control method thereof, wherein the invention realizes the dual-motor drive of a front axle and a rear axle in a hydrogen fuel cell electric vehicle, the dual-motor drive matches the power of a battery and a motor, and the dual motors can work simultaneously in the full-force acceleration process of the vehicle, so that the total power is improved; when the vehicle runs under normal working conditions, the vehicle can work by a single motor. Therefore, the motor can work in a high-efficiency interval frequently, and meanwhile, the peak capacity of the battery can be completely released, so that the performance and the endurance are considered.

Description

Four-drive motor system of hydrogen fuel cell electric automobile and control method thereof
Technical Field
The invention belongs to a new energy automobile, particularly relates to a four-drive motor system of a hydrogen fuel cell electric automobile and a control method thereof, and aims at the field of high-maneuverability matching of a power drive system of a hydrogen fuel cell automobile.
Background
The society vigorously pushes environment-friendly new energy automobiles, including hydrogen fuel cell electric automobiles, which use hydrogen fuel cells as power providers, match with auxiliary energy systems, and drive wheels through driving motors to realize vehicle movement.
In order to achieve the high level of dynamic performance of the electric automobile, a single motor with a large power reserve is generally used for achieving vehicle driving, and the single motor driving cannot give consideration to performance, high maneuverability and endurance.
Under the condition that the battery capacity is not changed, if the power performance needs to be improved, the peak power of the motor reserve needs to be larger than that of the battery, so that the battery capacity can be fully exerted in the acceleration and deceleration process. However, under normal working conditions, the power of the motor is much more surplus, so that the efficiency is reduced.
Disclosure of Invention
The invention aims to solve the technical problems that the existing hydrogen fuel cell has limited space layout, short driving mileage, weak dynamic property and low reliability and does not meet the requirement of high maneuverability, and provides a four-drive motor system of a hydrogen fuel cell electric vehicle and a control method thereof.
According to one aspect of the present invention, to solve the technical problems, the present invention provides a dual drive motor system for a hydrogen fuel cell electric vehicle, comprising: VCU (vehicle Control Unit), a middle hydrogen tank, a rear hydrogen tank, two driving motor systems and a fuel cell engine assembly;
the middle hydrogen tank is positioned in the middle of the hydrogen fuel cell electric automobile in the front-back direction, and the rear hydrogen tank is positioned at the rear of the hydrogen fuel cell electric automobile in the front-back direction;
the two driving motor systems are a front driving motor system and a rear driving motor system, the front driving motor system is integrated with a front motor, a front gearbox and a front motor controller, and the rear driving motor system is integrated with a rear motor, a rear gearbox and a rear motor controller; the front motor is arranged at the front shaft, and the rear motor is arranged at the rear shaft; the output shaft of the front motor is connected with the input shaft of the front gearbox, the output shaft of the front gearbox is used for connecting the front left tire and the front right tire, the output shaft of the rear motor is connected with the input shaft of the rear gearbox, and the output shaft of the rear gearbox is used for connecting the rear left tire and the rear right tire; the front gearbox is provided with a reduction gearbox, the forward direction of the headstock is taken as the forward direction, and the front gearbox is arranged close to the right side of the front motor;
the fuel cell engine assembly is positioned at the front part of the hydrogen fuel cell electric automobile in the front-back direction, provides working electric energy for the two driving motor systems and other loads of the hydrogen fuel cell electric automobile, comprises a galvanic pile and a controller for controlling the working state of the galvanic pile, and is respectively connected with the middle hydrogen tank and the rear hydrogen tank to obtain hydrogen for working; the front driving motor system is fixed behind and below the fuel cell engine assembly, and the rear driving motor system is positioned between the middle hydrogen tank and the rear hydrogen tank;
the motor controllers in the two drive motor systems and the controller in the fuel cell engine assembly are connected and controlled by the VCU.
Further, in the dual-drive motor system of the hydrogen fuel cell electric vehicle of the invention, the two motors, namely the front motor and the rear motor, are both permanent magnet synchronous motors, and output shafts of the two motors and output shafts of the corresponding gearboxes are not on the same axis but are positioned in a parallel direction.
Further, in the dual-drive motor system of the hydrogen fuel cell electric vehicle, the rear motor is provided with a parking system, and the parking system is connected with and controlled by the VCU and used for parking.
Further, in the dual-drive motor system of the hydrogen fuel cell electric vehicle, one or more of the front drive motor system and the rear drive motor system is/are provided with a disconnecting mechanism, the disconnecting mechanism is positioned between the motor of the drive motor system and the gearbox, when the disconnecting mechanism acts, the output shaft of the motor is disconnected with the input shaft of the gearbox, the motor can enter an idling state, otherwise, the output shaft of the motor is connected with the input shaft of the gearbox.
Further, in the dual-drive motor system of the hydrogen fuel cell electric vehicle of the invention, the motor controllers in the two drive motor systems and the controller in the fuel cell engine assembly are connected to the VCU through a CAN bus.
Further, in the dual-drive motor system of the hydrogen fuel cell electric vehicle, the front drive motor system and the rear drive motor system are provided with a front end cover and a rear end cover correspondingly, and the front end cover and the rear end cover both adopt half shaft support structures.
Further, in the dual-drive motor system of the hydrogen fuel cell electric vehicle, the front motor and the rear motor are connected with the chassis and the frame in a suspension mode exceeding 3 points.
According to another aspect of the present invention, to solve the technical problems, there is provided a control method for a dual driving motor system of a hydrogen fuel cell electric vehicle, where the two driving motor systems are independently controlled by a VCU, the control method including:
calculating the power required by the hydrogen fuel cell electric automobile;
when the required power is less than the peak power reserved by a single motor, the VCU controls one of the two driving motor systems to work, the other motor does not work, and an axle with large axle load in the front axle and the rear axle is selected as a driving axle;
when the required power is not less than the peak power reserved by a single motor, the VCU controls the two driving motor systems to adopt a working mode of double shafts and double motors, outputs corresponding torques according to the charge proportion of the front shaft and the rear shaft to respectively drive the front motor and the rear motor, and controls the rotation speed coordination of the front motor and the rear motor to prevent the driving wheels from generating slip and slip phenomena.
Further, in the control method of the invention, in the two driving motor systems, the four-quadrant control of the motors is realized by the corresponding motor controllers, the motor controllers are integrated in the driving motor systems, the internal parts share the cooling system and the motor voltage input circuit, the two driving motor systems respond to the torque quality solved by the control of the whole vehicle to control, and the two driving motor systems realize the fault diagnosis of the internal part and the external part of the driving motor systems through the integrated motor controllers.
Furthermore, in the control method of the invention, in the two driving motor systems, the power range of the front motor is 40-150 kw, and the power range of the rear motor is 100-250 kw.
The hydrogen fuel cell electric vehicle dual-drive motor system and the control method thereof have the following technical effects: the invention realizes the double-motor driving of the front axle and the rear axle in the hydrogen fuel cell electric car, the double-motor driving matches the power of the battery and the motor, and the double motors can work simultaneously in the full-force acceleration process of the vehicle, so that the total power is improved; when the vehicle runs under normal working conditions, the vehicle can work by a single motor. Therefore, the motor can work in a high-efficiency interval frequently, and meanwhile, the peak capacity of the battery can be completely released, so that the performance and the endurance are considered.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic diagram of a dual drive motor for a hydrogen fuel cell electric vehicle according to the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of a dual drive motor of a hydrogen fuel cell electric vehicle according to the present invention. The invention relates to a hydrogen fuel cell electric vehicle dual-drive motor system, which comprises: vcu (vehicle Control unit), a middle hydrogen tank 6, a rear hydrogen tank 7, two drive motor systems, and a fuel cell engine assembly 1.
The middle hydrogen tank 6 is located at the middle of the hydrogen fuel cell electric vehicle in the front-rear direction, and the rear hydrogen tank 7 is located at the rear of the hydrogen fuel cell electric vehicle in the front-rear direction. The number of 1-3 jars is adopted to middle part hydrogen tank 6, can adjust according to the actual arrangement condition, and rear portion hydrogen tank 7 is a jar.
The two driving motor systems are a front driving motor system 2 and a rear driving motor system 3, the front driving motor system 2 is integrated with a front motor, a front gearbox and a front motor controller, and the rear driving motor system 3 is integrated with a rear motor, a rear gearbox and a rear motor controller; the front motor is positioned at the front shaft, and the rear motor is positioned at the rear shaft; the output shaft of the front motor is connected with the input shaft of the front gearbox, the output shaft of the front gearbox is used for connecting the front left tire and the front right tire, the output shaft of the rear motor is connected with the input shaft of the rear gearbox, and the output shaft of the rear gearbox is used for connecting the rear left tire and the rear right tire; the front gearbox is provided with a reduction gearbox, the forward direction of the vehicle head is taken as the forward direction, and the front gearbox is arranged on the right side close to the front motor. The two motors of the front motor and the rear motor are both permanent magnet synchronous motors, and output shafts of the two motors and output shafts of the corresponding gearboxes are not on the same axis but are positioned in the parallel direction. In the two driving motor systems, the power range of the front motor is 40-150 kw, and the power range of the rear motor is 100-250 kw, but in other implementation manners, the power ranges of the two motors may be set to be the same.
In the two-drive motor system of the hydrogen fuel cell electric automobile, the rear motor is provided with a parking system which is connected with and controlled by a VCU8 and is used for parking. One or more of the front drive motor system 2 and the rear drive motor system 3 is/are provided with a disconnecting mechanism, the disconnecting mechanism is positioned between the motor and the gearbox of the drive motor system, when the disconnecting mechanism acts, the output shaft of the motor is disconnected with the input shaft of the gearbox, the motor can enter an idle state, otherwise, the output shaft of the motor is connected with the input shaft of the gearbox.
The fuel cell engine assembly 1 is positioned at the front part of the hydrogen fuel cell electric automobile in the front-back direction, provides working electric energy for two driving motor systems and other loads of the hydrogen fuel cell electric automobile, comprises a galvanic pile and a controller for controlling the working state of the galvanic pile, and is respectively connected with a middle hydrogen tank 6 and a rear hydrogen tank 7 through hydrogen inlet pipes k and j so as to obtain hydrogen for working; the front driving motor system 2 is fixed behind and below the fuel cell engine assembly 1, and the rear driving motor system 3 is located between the middle hydrogen tank 6 and the rear hydrogen tank 7. The output end of the fuel cell engine assembly 1 is connected with the DCDC and PDU module 4 and is used for controlling the energy flow direction of the two driving motor systems under the control of the DCDC and PDU module 4.
The motor controllers in the two drive motor systems and the controller in the fuel cell engine assembly 1 are connected and controlled by the VCU 8. Preferably, the motor controllers in the two drive motor systems and the connection of the controllers in the fuel cell engine assembly 1 to the VCU8 are connected by a CAN bus, where d, b, m, n, p, q, s in fig. 1 represent the low voltage connection (with respect to the high voltage connection u, v, w described below) and the CAN communication harness.
Of course, the hydrogen fuel cell electric vehicle should also have a steering system 9 for steering.
The invention also provides a control method for the dual-drive motor system of the hydrogen fuel cell electric vehicle, wherein the two drive motor systems are independently controlled by the VCU8 respectively, and the control method comprises the following steps:
and calculating the power required by the hydrogen fuel cell electric automobile.
When the required power is less than the peak power reserved by a single motor, the VCU8 controls one of the two drive motor systems to work, the rest motors do not work, and the axle with large axle load in the front axle and the rear axle is selected as the drive axle. The front and rear shaft motors have low load rate, and if double motors cause lower working efficiency of the two motors, only one motor is needed at the moment. In this case, on one hand, overheating caused by high-power driving of a single motor is reduced; on the other hand, when the double-shaft drive is carried out, the radiuses of the front wheel and the rear wheel are different due to different tire wear or air pressure; or the front and rear driving wheels have different strokes due to uneven road surface and curve running, so that the power circulation phenomenon of the front and rear driving axles is caused, the additional consumption of the motor power is caused, and the abnormal abrasion of the tire and the transmission system parts is caused.
When the required power is not less than the peak power stored by a single motor and is less than a preset value, the VCU8 controls the two driving motor systems to adopt a working mode of a double-shaft double motor, outputs corresponding torques according to the charge proportion of the front shaft and the rear shaft to respectively drive the front motor and the rear motor, and controls the rotation speed coordination of the front motor and the rear motor to prevent the driving wheels from slipping and slipping.
In the two driving motor systems, four-quadrant control of the motors is realized by corresponding motor controllers which are integrated in the driving motor systems, a cooling system and motor voltage input lines (high-voltage connecting lines u, v and w) are shared inside the driving motor systems, the two driving motor systems respond to torque quality solved by the control of the whole vehicle to control, and the two driving motor systems realize self internal and external fault diagnosis through the integrated motor controllers. If any one or more motors fail, the VCU controls the remaining one motor to participate in driving, and the vehicle is operated under the derating condition.
Under the braking working condition, a front and rear axle double-motor driving system is adopted for braking, and in order to recover braking energy as much as possible, a braking strategy can control the front and rear axle motors to perform double-motor regenerative braking in a power generation state; if the regenerative braking force of the motor is smaller than the braking force required by the vehicle, the insufficient part is supplemented by the mechanical braking force; the regenerated electrical energy can be stored in the supercapacitor 5. The front motor and the rear motor are braked, so that the braking distance is shortened, and the direction stability of the vehicle during braking is ensured.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A dual drive motor system for a hydrogen fuel cell electric vehicle, comprising: the system comprises a VCU, a middle hydrogen tank, a rear hydrogen tank, two driving motor systems and a fuel cell engine assembly;
the middle hydrogen tank is positioned in the middle of the hydrogen fuel cell electric automobile in the front-back direction, and the rear hydrogen tank is positioned at the rear of the hydrogen fuel cell electric automobile in the front-back direction;
the two driving motor systems are a front driving motor system and a rear driving motor system, the front driving motor system is integrated with a front motor, a front gearbox and a front motor controller, and the rear driving motor system is integrated with a rear motor, a rear gearbox and a rear motor controller; the front motor is arranged at the front shaft, and the rear motor is arranged at the rear shaft; the output shaft of the front motor is connected with the input shaft of the front gearbox, the output shaft of the front gearbox is used for connecting the front left tire and the front right tire, the output shaft of the rear motor is connected with the input shaft of the rear gearbox, and the output shaft of the rear gearbox is used for connecting the rear left tire and the rear right tire; the front gearbox is provided with a reduction gearbox, the forward direction of the headstock is taken as the forward direction, and the front gearbox is arranged close to the right side of the front motor;
the fuel cell engine assembly is positioned at the front part of the hydrogen fuel cell electric automobile in the front-back direction, provides working electric energy for the two driving motor systems and other loads of the hydrogen fuel cell electric automobile, comprises a galvanic pile and a controller for controlling the working state of the galvanic pile, and is respectively connected with the middle hydrogen tank and the rear hydrogen tank to obtain hydrogen for working; the front driving motor system is fixed behind and below the fuel cell engine assembly, and the rear driving motor system is positioned between the middle hydrogen tank and the rear hydrogen tank;
the motor controllers in the two drive motor systems and the controller in the fuel cell engine assembly are connected and controlled by the VCU.
2. The dual-drive motor system of the hydrogen fuel cell electric vehicle according to claim 1, wherein the two motors, the front motor and the rear motor, are both permanent magnet synchronous motors, and output shafts of the two motors and output shafts of the corresponding gearboxes are not on the same axis but are located in parallel.
3. The dual drive motor system of a hydrogen fuel cell electric vehicle according to claim 1, characterized in that the rear motor is equipped with a parking system connected and controlled by the VCU for parking use.
4. The dual-drive motor system of the hydrogen fuel cell electric vehicle as claimed in claim 1, wherein one or more of the front drive motor system and the rear drive motor system is provided with a disconnecting mechanism, the disconnecting mechanism is located between the motor and the gearbox of the drive motor system, when the disconnecting mechanism acts, the output shaft of the motor is disconnected with the input shaft of the gearbox, the motor can enter an idling state, otherwise, the output shaft of the motor is connected with the input shaft of the gearbox.
5. The dual drive motor system of claim 1, wherein the motor controllers in the two drive motor systems and the controller in the fuel cell engine assembly are connected to the VCU via a CAN bus.
6. The hydrogen fuel cell electric vehicle dual-drive motor system according to claim 1, wherein the front drive motor system and the rear drive motor system are provided with a front end cover and a rear end cover correspondingly, and the front end cover and the rear end cover both adopt a half-shaft support structure.
7. The dual drive motor system of a hydrogen fuel cell electric vehicle according to claim 1, wherein the front motor and the rear motor are connected to the chassis and the frame by means of over 3 point suspension.
8. A control method for the dual drive motor system of the hydrogen fuel cell electric vehicle according to any one of claims 1 to 7, wherein the two drive motor systems are independently controlled by the VCU, respectively, the control method comprising:
calculating the power required by the hydrogen fuel cell electric automobile;
when the required power is less than the peak power reserved by a single motor, the VCU controls one of the two driving motor systems to work, the other motor does not work, and an axle with large axle load in the front axle and the rear axle is selected as a driving axle;
when the required power is not less than the peak power reserved by a single motor, the VCU controls the two driving motor systems to adopt a working mode of double shafts and double motors, outputs corresponding torques according to the charge proportion of the front shaft and the rear shaft to respectively drive the front motor and the rear motor, and controls the rotation speed coordination of the front motor and the rear motor to prevent the driving wheels from generating slip and slip phenomena.
9. The control method according to claim 8, wherein in the two driving motor systems, the four-quadrant control of the motors is realized by corresponding motor controllers, the motor controllers are integrated in the driving motor systems, the cooling system and the motor voltage input lines are shared internally, the two driving motor systems control the torque quality in response to the control of the whole vehicle, and the two driving motor systems realize the internal and external fault diagnosis of the two driving motor systems through the integrated motor controllers.
10. The control method according to claim 8, wherein in the two drive motor system, the power of the front motor is in the range of 40-150 kw, and the power of the rear motor is in the range of 100-250 kw.
CN202010210166.1A 2020-03-23 2020-03-23 Four-drive motor system of hydrogen fuel cell electric automobile and control method thereof Withdrawn CN111319476A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010210166.1A CN111319476A (en) 2020-03-23 2020-03-23 Four-drive motor system of hydrogen fuel cell electric automobile and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010210166.1A CN111319476A (en) 2020-03-23 2020-03-23 Four-drive motor system of hydrogen fuel cell electric automobile and control method thereof

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CN111319476A true CN111319476A (en) 2020-06-23

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Application publication date: 20200623