CN101947922A - Multi-power source automobile electric propulsion system and control method thereof - Google Patents
Multi-power source automobile electric propulsion system and control method thereof Download PDFInfo
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- CN101947922A CN101947922A CN 201010252087 CN201010252087A CN101947922A CN 101947922 A CN101947922 A CN 101947922A CN 201010252087 CN201010252087 CN 201010252087 CN 201010252087 A CN201010252087 A CN 201010252087A CN 101947922 A CN101947922 A CN 101947922A
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Abstract
The invention discloses a multi-power source automobile electric propulsion system and a control method thereof. The electric propulsion system comprises a vehicle control unit which gives commands and processes information from controllers of subsystems, wherein the subsystems comprise an onboard power supply system, an electric driving system and a complete electric accessory system, wherein the onboard power supply system receives commands of a measurement control unit and outputs electric power; the electric driving system outputs a torque for vehicle advancement according to the electric power; and the vehicle control unit, the electric driving system and the complete electric accessory system are connected in parallel and electrically connected with a high-voltage bus. The systems can be used for the multi-power source automobile electric propulsion system, establish a universal structural platform, and can share key parts, reduce the cost of the complete vehicle and reduce the industrialized cost.
Description
Technical field
The invention belongs to the new-energy automobile field, relate to a kind of multi power source motorcar electric propulsion system specifically, can be applicable to adopt the new-energy automobile such as fuel cell powered vehicle, hybrid vehicle, pure electric automobile of motor direct-drive.
The invention still further relates to a kind of control method, this method is used for above-mentioned described electric propulsion system.
Background technology
Three general orientation that the development of new-energy automobile at present is clear and definite: hybrid power, pure electronic and fuel cell.And hybrid power technology dynamics system configuration has variety (series, parallel and series-parallel connection), there is different topological structures equally in the fuel cell powered vehicle power system, bring cooresponding difficulty therefore for the exploitation of new-energy automobile, mainly show: 1) related components is difficult to typing, forms tandem product; 2) the power system framework is varied, needs the parts of exploitation different size, and parts are difficult to general, and cost of development and industrialization cost increase; 3) control policy needs at different frameworks, the control policy complexity, and development difficulty and time-to-market increase; 4) the power system platform is difficult to sharedly, and time-to-market and cost of development rise.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of motorcar electric propulsion system, can be applied to the new-energy automobile of multi power source.
The present invention is by the following technical solutions:
A kind of multi power source motorcar electric propulsion system comprises control unit for vehicle, and this unit sends instruction and handles information from each subsystem controller; Described subsystem comprises vehicle-mounted electric power system, and this unit receives described measure-controlling unit instruction and electromotive power output; Power drive system, this system exports the torque of a prospect of buying car in installments according to electric power; And the electronic accessory system of car load; Described control unit for vehicle, power drive system, and the electronic accessory system parallel connection of car load, and be electrically connected with high voltage bus.
Further, described power drive system comprises power electronics unit and motor, described subsystem controller comprises the energy management system of controlling vehicle-mounted electric power system, the motor control unit of control power drive system and the ECU (Electrical Control Unit) of the electronic accessory system of control car load, and described energy management system, control motor control unit are connected with vehicular control unit by bus with ECU (Electrical Control Unit).
Further, described vehicle-mounted electric power system comprises an energy source.
Preferably, described energy source is a power accumulator.
Further, described vehicle-mounted electric power system comprises that a main energy source and an auxiliary energy source are connected in parallel on the high voltage bus.
Preferably, described main energy source is a closed-centre system, and described auxiliary energy source is an Auxiliary Power Unit.
The present invention can be used for multiple propulsion source motorcar electric propulsion system, has set up a general-duty framework platform, can not only shared key components and parts, reduce integral vehicle cost, and reduce the industrialization cost.
Another technical matters that the present invention will solve provides a kind of control method of motorcar electric propulsion system, can be applied to the new-energy automobile of multi power source equally.
A kind of control method of multi power source motorcar electric propulsion system, comprise control unit for vehicle, vehicle-mounted electric power system, the electric drive trains car load electric work accessory system of unifying, the car load electric work accessory system parallel connection of unifying of described vehicle-mounted electric power system, electric drive trains, and be electrically connected with high voltage bus, control unit for vehicle receive the signal of chaufeur and respectively from described vehicle-mounted electric power system, electric drive trains unify car load electric work accessory system parameter information, handle and send the instruction respective feedback to vehicle-mounted electric power system, the electric drive trains car load electric work accessory system of unifying.
Further, described vehicle-mounted electric power system comprises that a main energy source and an auxiliary energy source are connected in parallel on the high voltage bus, common electromotive power output, and auxiliary energy source horsepower output is constant; Control unit for vehicle determines required electric power according to the vehicle road conditions, and when auxiliary energy source horsepower output was higher than required electric power, the part that exceeds was given main energy source charging; When auxiliary energy source horsepower output was lower than required electric power, main energy source replenished not enough part.
The present invention can be used for multiple propulsion source motorcar electric propulsion system, can realize the control to this electric propulsion system, guarantees that this system works is in optimum regime.
Description of drawings
Fig. 1 is the framework scheme drawing of the multi power source motorcar electric propulsion system that the present invention relates to.
Fig. 2 is the framework platform of the control method of the multi power source motorcar electric propulsion system that the present invention relates to.
Fig. 3 is at the scheme drawing of energy distribution in the control method of the multi power source motorcar electric propulsion system that the present invention relates to.
Fig. 4 is first kind of embodiment of the multi power source motorcar electric propulsion system that the present invention relates to, is applied on the fuel cell powered vehicle.
Fig. 5 is second kind of embodiment of the multi power source motorcar electric propulsion system that the present invention relates to, is applied on the hybrid vehicle.
Fig. 6 be the multi power source motorcar electric propulsion system that the present invention relates to the third embodiment, be applied to hybrid vehicle equally, but have only storage battery among this embodiment as main energy source.。
The specific embodiment
Referring to Fig. 1, the motorcar electric propulsion system that the present invention relates to comprises control unit for vehicle 1, and this unit sends instruction and handles information from each controller; Vehicle-mounted electric power system 2, this subsystem receives the instruction and the electromotive power output of control unit for vehicle 1; Power drive system comprises power electronics unit 3 (PEU), motor and deceleration/box of tricks, and power electronics unit 3 receives electric power may command motor 4 output torques and is delivered to wheel through deceleration/box of tricks, and powered vehicle is advanced; The electronic accessory system of car load comprises electric air-conditioning compressor, cooling fan, cooling water pump etc., on the car except that motor other accessory systems that need drive and control from translator equally.Wherein, described vehicle-mounted electric power system 2 can be made up of fuel cell system, power accumulator, engine/electric generator system, can the become one coaxial output system of formula of motor 4 in the described power drive system, deceleration box of tricks 5, size is big, the defective of difficult arrangement to solve in the former vehicle structure.Power drive system also can adopt distributed wheel hub motor to substitute centralized main motor driven systems.Vehicle-mounted electric power system employing has suitable energy density, power density can be carried the energy source that vehicle is used, for example solar power system, super capacitor etc.Described vehicle-mounted electric power system 2 is in parallel by the electronic accessory system of high voltage bus and power electronics unit 3, car load 4.
Control unit for vehicle 1 also is a power control flat-bed main control unit.The controller of above-mentioned vehicle-mounted electric power system 2 is energy management system 6 (EMS), and the controller of power electronics unit 3 is motor control unit 7 (MCU), and the controller of the electronic accessory system 4 of car load is ECU (Electrical Control Unit) 8 (ECU).The power control platform is distributed, described energy management system 6, motor control unit 7, ECU (Electrical Control Unit) 8 are controlled respectively and are managed relevant subsystem, and control unit for vehicle 1 is connected with above-mentioned three controllers by bus 9, and received signal also is responsible for torque management strategy, multipotency source allocation strategy, car load security strategy and fault detection and processing.
Configuration of the present invention can be divided into two kinds of configurations: stand alone type, and hybrid.So-called free-standing configuration, promptly vehicle-mounted electric power system 2 is made up of an energy source: power accumulator.Under this configuration, power accumulator is as voltage source, the whole power demands when vehicle operating is provided, and reclaim vehicle and slowing down or energy during brake.
So-called compound configuration, promptly vehicle-mounted electric power system 2 is composed in parallel by two energy sources: main energy source, auxiliary energy source.For guaranteeing the system dynamics response, improving the new-energy automobile fuel economy, main energy source can adopt closed-centre systems such as chemical storage batteries, super capacitor or flywheel energy storage system, and Auxiliary Power Unit (APU) is adopted in the auxiliary energy source, comprises fuel cell system, petrol/diesel engines-generator system or alternative-fuel engine-generator system.Required average power when the auxiliary energy source provides the vehicle conventional speeds to travel, and main energy source is used to provide peak power on the one hand to replenish the deficiency of vehicle master's energy source horsepower output ability when quickening or climb, and is used to reclaim the energy of vehicle when slowing down or brake on the other hand.Under this configuration, the voltage of high voltage dc bus is directly by closed-centre system decision, and and do not have coupled relation between the main energy source fan-out capability, main simultaneously energy source is as current source, but its power output free adjustment.
In addition, corresponding to this framework, a kind of control method is arranged, be used to realize power-on and power-off time schedule control, chaufeur expectation torque parsing, energy management, car load heat management, complete vehicle fault diagnosis and processing, can adjust flexibly according to the variation of vehicle-mounted electric power system 2, can guarantee that this system works is in optimum regime.Fig. 2 is the framework platform of the control method that the present invention relates to.Comprise entire car controller (being located on the control unit for vehicle 1), be used to receive the signal that chaufeur sends, and the signal that sends of each subsystem controller and handling, result is sent on each subsystem controller.Described subsystem comprises energy management system 6 (EMS), motor control unit 7 (MCU) and ECU (Electrical Control Unit) 8 (ECU), specifically, described energy management system 6 comprises Control of Auxiliary Power Unit device, closed-centre system controller, described motor control unit 7 comprises the motor control unit controller, described ECU (Electrical Control Unit) 8 comprises cooling system controller, the a/c system controller, electric system controller, display unit controller.Entire car controller receives the magnitude of power of auxiliary unit, and the ON/OFF of control auxiliary unit, and demand power.Entire car controller receives SOC (main energy source) parameter and the temperature parameter of closed-centre system controller, and the ON/OFF of control closed-centre system.Entire car controller receives rotating speed, torque, the temperature parameter of motor driven systems, and the ON/OFF of control motor driven systems.Other each subsystem is issued entire car controller by controller with parameter, makes corresponding instruction by entire car controller after processing.
In compound configuration, compose in parallel by two energy sources based on vehicle-mounted electric power system, need that two energy sources are carried out energy and assign.See Fig. 3, main energy source horsepower output is followed the tracks of the vehicle ' power demand, when main energy source SOC is low, starts the auxiliary energy source and exports constant power (optimal working point), is higher than the vehicle ' power demand and partly is used for to main energy source charging.When the vehicle ' power demand surpasses auxiliary energy source optimization point power, replenish insufficient section by main energy source.When main energy source SOC is too high, close main energy source.Energy distribution should be guaranteed: 1) energy between reasonable distribution auxiliary energy source and the main energy source is supplied with; 2) ACTIVE CONTROL auxiliary energy source is operated in the optimum condition zone as far as possible, comprises start and stop control and power output control; 3) Passive Control master energy source, fluctuation part-" peak load shifting " of compensation demand power; 4) adjust main energy source and suitably discharge and recharge, control its SOC and remain in the suitable scope, take into account the safety and the performance optimization of main energy source.
When adopting free-standing configuration, only need cancellation Auxiliary Power Unit part, remove the energy distribution strategy and get final product.
This method has high-mobility, multipurpose, wheeled vehicle, can build the power platform technology with common technology flexibly in not isomorphism type and different vehicle-mounted electric power systems switching, efficiently solves the problem of new-energy automobile cost of development height, exploitation complexity and time-to-market length.
Below be three embodiment of the electric propulsion system that the present invention relates to.
As shown in Figure 4, this electric propulsion system is applied in the plug-in fuel cell powered vehicle.This system is powered by a cover miniwatt fuel cell system (comprising fuel cell and hydrogen storage system), and is connected with high voltage bus by the unidirectional DC/DC of a current mode.Adopt the high-performance power accumulator of a cover in parallel with high voltage bus simultaneously, main drive motor system and electronic accessory system (electric air-conditioning compressor, cooling fan, cooling water pump etc.), battery (Battery) directly insert high voltage bus.Power accumulator can utilize civilian 220V alternating current charging, to improve the continual mileage of vehicle.As seen from the figure, each subsystem all is provided with controller, comprises fuel cell controller (FCU), hydrogen storage system controller (HMU), and battery controller (BMS), DC/DC controller (DCF) all is connected with control unit for vehicle.
As shown in Figure 5, this electric propulsion system is applied in the oil electric mixed dynamic automobile.This system is by a cover engine/electric generator system power supply, and power accumulator is in parallel with high voltage bus, and main drive motor system and electronic accessory system (electric air-conditioning compressor, cooling fan, cooling water pump etc.), battery (Battery) directly insert high voltage bus.Wherein, driving engine and electrical generator are by corresponding springing direct connection, and both rotating speeds are identical.As seen from the figure, each subsystem all is provided with controller, all is connected with control unit for vehicle.Auxiliary Power Unit (APU) horsepower output is realized by measure-controlling unit VMS control EMS (engine management system) and GCU (engine controller).
As shown in Figure 6, this electric propulsion system is applied in the pure electric automobile.This system is powered by power accumulator, and main drive motor system and electronic accessory system (electric air-conditioning compressor, cooling fan, cooling water pump etc.), battery (Battery) directly insert high voltage bus.Wherein, the vehicle operating power demand is provided by power accumulator fully.As seen from the figure, each subsystem all is provided with controller, all is connected with control unit for vehicle, comprises battery management system (BMS).
Claims (8)
1. multi power source motorcar electric propulsion system is characterized in that:
Comprise control unit for vehicle (1), this unit sends instruction and handles information from each subsystem controller; Described subsystem comprises,
Vehicle-mounted electric power system (2), this system receive described measure-controlling unit instruction and electromotive power output;
Power drive system, this system exports the torque of a prospect of buying car in installments according to electric power;
And the electronic accessory system of car load;
Described control unit for vehicle (1), power drive system, and the electronic accessory system parallel connection of car load, and be electrically connected with high voltage bus.
2. multi power source motorcar electric propulsion system according to claim 1, it is characterized in that: described power drive system comprises power electronics unit (3) and motor (4), described subsystem controller comprises the energy management system (6) of the vehicle-mounted electric power system of control (2), the motor control unit (7) of control power drive system and the ECU (Electrical Control Unit) (8) of the electronic accessory system of control car load, and described energy management system (6), control motor control unit (7) are connected with vehicular control unit by bus (9) with ECU (Electrical Control Unit) (8).
3. multi power source motorcar electric propulsion system according to claim 2 is characterized in that: described vehicle-mounted electric power system (2) comprises an energy source.
4. multi power source motorcar electric propulsion system according to claim 3 is characterized in that: described energy source is a power accumulator.
5. multi power source motorcar electric propulsion system according to claim 2 is characterized in that: described vehicle-mounted electric power system (2) comprises that a main energy source and an auxiliary energy source are connected in parallel on the high voltage bus.
6. multi power source motorcar electric propulsion system according to claim 5 is characterized in that: described main energy source is a closed-centre system, and described auxiliary energy source is an Auxiliary Power Unit.
7. the control method of a multi power source motorcar electric propulsion system, comprise control unit for vehicle (1), vehicle-mounted electric power system (2), the electric drive trains car load electric work accessory system of unifying, described vehicle-mounted electric power system (2), the electric drive trains car load electric work accessory system parallel connection of unifying, and be electrically connected with high voltage bus, it is characterized in that: control unit for vehicle (1) receives the signal of chaufeur and respectively from described vehicle-mounted electric power system (2), electric drive trains unify car load electric work accessory system parameter information, handle and send the instruction respective feedback and give vehicle-mounted electric power system (2), the electric drive trains car load electric work accessory system of unifying.
8. the control method of multi power source motorcar electric propulsion system according to claim 7, it is characterized in that: described vehicle-mounted electric power system (2) comprises that a main energy source and an auxiliary energy source are connected in parallel on the high voltage bus, common electromotive power output, auxiliary energy source horsepower output is constant; Control unit for vehicle (1) determines required electric power according to the vehicle road conditions, and when auxiliary energy source horsepower output was higher than required electric power, the part that exceeds was given main energy source charging; When auxiliary energy source horsepower output was lower than required electric power, main energy source replenished not enough part.
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| CN103010008A (en) * | 2011-09-27 | 2013-04-03 | 北京理工大学 | Universal novel energy resource passenger car platform |
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| CN107499141A (en) * | 2017-09-20 | 2017-12-22 | 中国重汽集团济南动力有限公司 | A kind of multiaxis Direct wheel drives distributed high-pressure system used for electric vehicle |
| CN109641657A (en) * | 2016-09-08 | 2019-04-16 | 通用电气公司 | Tilting rotor propulsion system for aircraft |
| CN113565164A (en) * | 2021-09-26 | 2021-10-29 | 徐工集团工程机械股份有限公司科技分公司 | Loader control system, loader, and loader control method |
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| CN113565164A (en) * | 2021-09-26 | 2021-10-29 | 徐工集团工程机械股份有限公司科技分公司 | Loader control system, loader, and loader control method |
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