CN115257348A - Plug-in series-parallel hybrid power system - Google Patents

Plug-in series-parallel hybrid power system Download PDF

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Publication number
CN115257348A
CN115257348A CN202210786716.3A CN202210786716A CN115257348A CN 115257348 A CN115257348 A CN 115257348A CN 202210786716 A CN202210786716 A CN 202210786716A CN 115257348 A CN115257348 A CN 115257348A
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China
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engine
motor
series
plug
wheel
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CN202210786716.3A
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Chinese (zh)
Inventor
阚羽
石瑞林
李建才
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Chery Automobile Co Ltd
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Chery Automobile Co Ltd
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Priority to CN202210786716.3A priority Critical patent/CN115257348A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/28—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the electric energy storing means, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/38—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
    • B60K6/383—One-way clutches or freewheel devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/46—Series type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • 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
    • Y02T10/62—Hybrid vehicles

Abstract

The invention discloses a plug-in series-parallel hybrid power system, which comprises: the device comprises a hub motor, an ISG motor, a motor controller and a one-way clutch; the ISG motor is electrically connected with the battery pack and the hub motor respectively; the working modes of the plug-in series-parallel hybrid power system comprise pure electric drive, series drive, parallel drive, direct drive of an engine, kinetic energy recovery and parking charging; the one-way clutch is used for switching a plurality of working modes; the ISG motor is used for generating power and adjusting the working point of the engine; the motor controller is used for controlling the hub motor and the ISG motor; the engine is used for generating electricity or driving wheels; the hub motor is used for driving the wheel in a working mode except a direct-drive working mode of the engine. The traditional multi-gear transmission case is not needed, the control logic complexity of a transmission system is reduced, the energy transfer link is simplified, the fuel economy is improved, the integration level of a hybrid power system is improved, the system cost is reduced, and meanwhile the structural arrangement flexibility of the hybrid power system is improved.

Description

Plug-in series-parallel hybrid power system
Technical Field
The invention relates to the technical field of hybrid power systems for vehicles, in particular to a plug-in series-parallel hybrid power system.
Background
At present, the mainstream hybrid power system is a design framework which mainly adopts internal combustion engine driving and adopts motor driving as assistance. A multi-gear transmission is mostly arranged for improving the working range of the engine, and under the condition of the same vehicle speed and acceleration, the adjustment of the working point (rotating speed and torque load) of the engine can be realized through gear selection. The working points of the engine before and after gear shifting are close to the economic region as much as possible, and the aim of saving oil is achieved. However, after the traditional gearbox is shifted, a coupling relation exists between the engine speed and the torque, the engine speed is reduced by a certain proportion, and the torque is increased by a certain proportion, so that the engine before and after shifting cannot simultaneously take into account the economic range of the engine speed and the torque load, and most working conditions still cannot achieve the best economy.
Chinese patent (CN 201784618U) discloses a hybrid system, which includes an engine, a gearbox, an ISG motor, a vehicle controller, a hub motor, and the like. However, in the hybrid power system, the engine is coaxially connected with the ISG motor, so that the size and the arrangement difficulty of the hybrid power system are increased. And the ISG motor can not directly supply power for the two hub motors when being used as a generator, but can only charge the battery and then supply power for the hub motors by the battery, so that the circulation path of energy is increased undoubtedly, and the energy utilization rate is reduced. The use of a gearbox increases the production costs on the one hand and also reduces the reliability of the system on the other hand.
Chinese patent (CN 202986799U) discloses a hybrid drive system, which includes a generator, an SSG system, a transmission, an energy storage device, a clutch and a hub motor. In this system the SSG is connected to the engine via a pulley, although in this way SSG can be used to start the engine, adjust the engine operating point and act as a generator to charge the energy storage device. However, the SSG is connected to the engine via a pulley, and a corresponding tensioner is required, and the use of the pulley reduces the transmission efficiency of the system and increases the operational burden on the engine. Further, the SSG has a limited power generation capability and cannot be used as a drive motor at the front end of the engine.
Chinese patent (CN 106394230A) discloses an oil-electricity hybrid multi-mode automobile driving system, which mainly comprises a generator, a clutch, an ISG motor, an overrunning clutch, a hub motor, a storage battery and a controller. The hybrid power system can realize the switching of the working modes by combining/separating the clutch. However, the combined use of multiple clutches inevitably increases the control difficulty of the system, and the frequent engagement and disengagement of the clutches also reduces the driving comfort of the vehicle. In addition, the engine and the ISG motor are coaxially connected, and the engine and the ISG motor cannot be decoupled and cannot generate power during deceleration braking, so that the application range of the ISG motor is limited. The engine, the ISG motor and the hub motor can provide driving force simultaneously by 4 power sources, and although the dynamic performance of the system can be improved, the power distribution strategy of the 4 power sources and the synchronous control precision of the three motors also provide great challenges for practical engineering application.
Disclosure of Invention
The present invention has been made in view of the above problems, and provides, by way of specific embodiments, a plug-in series-parallel hybrid system.
The embodiment of the invention provides a plug-in series-parallel hybrid power system, which comprises a battery pack, an engine, wheels and a vehicle controller, and is characterized by further comprising:
the device comprises a hub motor, an ISG motor, a motor controller and a one-way clutch; the ISG motor is electrically connected with the battery pack and the hub motor respectively;
the plug-in series-parallel hybrid power system comprises a plurality of working modes, wherein the plurality of working modes comprise pure electric drive, series drive, parallel drive, direct drive of an engine, kinetic energy recovery and parking charging;
the one-way clutch is used for switching the multiple working modes;
the ISG motor is used for generating power and adjusting the working point of the engine;
the motor controller is used for controlling the hub motor and the ISG motor;
the engine is used for generating electricity or driving the wheels;
the hub motor is used for driving the wheel in a working mode except for a direct-drive working mode of the engine.
Specifically, in the pure electric drive working mode, the wheel is driven by the in-wheel motor, the one-way clutch is disconnected, the engine stops working, and the battery pack provides electric energy for the plug-in series-parallel hybrid power system.
Specifically, plug-in series-parallel hybrid power system still includes: and when the electric quantity of the battery pack is lower than a preset value, the plug-in series-parallel hybrid power system does not enter the pure electric drive working mode.
Specifically, in the series driving working mode, the one-way clutch is disconnected, the wheel hub motor drives the wheel, the engine does not drive the wheel, the engine drives the ISG motor to generate electricity, the electric energy generated by the ISG motor is provided for the wheel hub motor, and the ISG motor adjusts the working point of the engine in the optimal efficiency area of oil consumption.
Specifically, in the parallel driving operation mode, the one-way clutch is engaged, the engine drives the wheel, when a preset rule is met, the battery pack supplies electric energy to the in-wheel motor, and the in-wheel motor and the engine drive the wheel together.
Specifically, in the engine direct-drive working mode, the one-way clutch is combined, the engine drives the wheels, the engine drives the ISG motor to generate power, and the ISG motor adjusts the working point of the engine to be in the optimal oil consumption efficiency area.
Specifically, in the kinetic energy recovery operation mode, the one-way clutch is disengaged, the engine and the ISG motor stop operating, and the in-wheel motor recovers kinetic energy and supplies electric energy to the battery pack.
Specifically, plug-in series-parallel hybrid power system still includes: when the braking torque provided by the hub motor is lower than the braking torque required, the mechanical brake supplements the braking torque difference.
Specifically, in the parking charging mode, the one-way clutch is disengaged, the engine drives the ISG motor to generate electricity, the generated electric energy is stored in the battery pack, and when the electric quantity of the battery pack reaches a preset value, the engine is turned off, and the ISG motor stops generating electricity.
Specifically, in the plug-in series-parallel hybrid power system, when the electric energy generated by the ISG motor driven by the engine is greater than the electric energy required to be consumed by the hub motor, surplus electric energy is stored in the battery pack; when the electric energy generated by the ISG motor driven by the engine is smaller than the electric energy required to be consumed by the hub motor, the battery pack provides electric energy to supply the hub motor.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the series-parallel hybrid power system mainly driven by the hub motor and assisted by the engine is provided, a traditional multi-gear transmission is not needed, the complexity of control logic of a transmission system is reduced, an energy transmission link is simplified, the energy conversion ratio is improved, and the fuel economy is greatly improved. Meanwhile, the technical scheme disclosed by the invention can better improve the integration level of the hybrid power system, so that compared with a mainstream engine and a single motor driving system, the embodiment of the invention can meet the system requirement by adopting a motor with lower power, thereby reducing the system cost and improving the flexibility of the arrangement of the hybrid power system.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a plug-in series-parallel hybrid power system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a pure electric drive mode of a plug-in series-parallel hybrid power system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a series-drive mode of a plug-in series-parallel hybrid power system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a parallel driving mode of a plug-in series-parallel hybrid power system according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a direct-drive operating mode of an engine of a plug-in series-parallel hybrid power system according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a kinetic energy recovery operation mode of a plug-in series-parallel hybrid power system according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a parking charging operation mode of a plug-in series-parallel hybrid power system according to an embodiment of the present invention.
Reference numerals: 1-an engine; 2-a speed reduction mechanism; 3-a one-way clutch; 4-ISG motor; 5-a differential; 6-vehicle wheels; 7-a battery pack; 8-hub motor.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to solve the problems in the prior art, the embodiment of the invention provides a plug-in series-parallel hybrid power system.
The embodiment of the invention provides a plug-in series-parallel hybrid power system, which comprises a battery pack 7, an engine 1, wheels 6 and a vehicle controller, and the structure of the plug-in series-parallel hybrid power system is shown in fig. 1, and the plug-in series-parallel hybrid power system further comprises:
the device comprises a hub motor 8, an ISG motor 4, a motor controller and a one-way clutch 3; the ISG motor is electrically connected with the battery pack 7 and the hub motor 8 respectively. An Integrated Starter and Generator (Integrated intelligent start-drive Generator) is an Integrated automobile starting and generating machine and is directly Integrated on a main shaft of an engine. The integration of ISG motors is higher compared to SSG motors (Static Synchronous generators). The battery pack 7 includes a high-voltage secondary battery.
Fig. 1 shows the connections of the different parts of the system, the dashed lines representing the electrical connections and the solid lines the mechanical connections. As shown in fig. 1, the plug-in series-parallel hybrid power system further includes a speed reduction mechanism 2 and a differential 5, the speed reduction mechanism 2 is mechanically connected with the ISG motor 4, the one-way clutch 3 is mechanically connected with the differential 5, and the wheels 6 are mechanically connected with the differential 5.
The plug-in series-parallel hybrid power system comprises a plurality of working modes, wherein the plurality of working modes comprise pure electric drive, series drive, parallel drive, direct drive of an engine, kinetic energy recovery and parking charging;
the one-way clutch 3 is used for switching the multiple working modes; the one-way clutch 3 is an important component for realizing the operation mode switching.
The ISG motor 4 is used for generating power and adjusting the working point of the engine;
the motor controller is used for controlling the hub motor 8 and the ISG motor 4;
the engine 1 is used for generating electricity or driving the wheels 6; the engine 1 provides driving power only when the vehicle running power needs to be high.
The in-wheel motor 8 is used for driving the wheels 6 in an operating mode other than the direct-drive operating mode of the engine 1. The driving power is provided by the hub motor 8 in most cases.
In the pure electric drive operating mode, as shown in fig. 2, the battery pack 7 provides electric energy for the in-wheel motor 8, the in-wheel motor 8 drives the wheel, the one-way clutch 3 is disconnected, the engine 1 stops working, and the battery pack 7 provides electric energy for the plug-in series-parallel hybrid power system. The plug-in series-parallel hybrid power system further comprises: and when the electric quantity of the battery pack 7 is lower than a preset value, the plug-in series-parallel hybrid power system does not enter the pure electric drive working mode. For example, when the electric power is sufficient, the driving force is provided by the in-wheel motor 8 when the vehicle is running at a start, an idle speed, and a medium-low speed. At the moment, the one-way clutch 3 is disconnected, the engine 1 stops working, the high-voltage storage battery in the battery pack 7 provides electric energy for the hybrid power system, and the hybrid power system is in a pure electric driving working mode.
In the series driving working mode, the one-way clutch 3 is disconnected, the wheel hub motor 8 drives the wheel, the engine 1 does not drive the wheel 6, the engine 1 drives the ISG motor 4 to generate electricity, as shown in fig. 3, the electric energy generated by the ISG motor 4 is provided for the wheel hub motor 8, and the ISG motor 4 adjusts the working point of the engine in the optimal oil consumption efficiency area. For example, in the series driving mode, the engine 1 drives the ISG motor 4 to generate power, the electric energy generated by the ISG motor 4 can be directly provided to the hub motor 8 and directly used for driving the wheel 6, and at this time, the engine 1 can work in the optimal fuel consumption efficiency area without being directly coupled with the wheel. As shown in fig. 3, if the engine 1 has surplus energy, the surplus energy is converted into electric energy by the generator (ISG motor 4) and stored in the battery pack 7. If the engine 1 is short of power, the battery pack 7 supplies electric energy to the hub motor 8 at the same time. In this mode, the one-way clutch 3 is disengaged, the in-wheel motor 8 is responsible for driving the vehicle to run, and the engine 1 is only responsible for generating electricity and does not directly participate in driving.
In the parallel driving operation mode, the one-way clutch 3 is engaged, the engine 1 drives the wheel 6, and when a preset rule is met, as shown in fig. 4, the battery pack 7 supplies electric energy to the in-wheel motor 8, and the in-wheel motor 8 and the engine 1 drive the wheel 6 together. For example, when the driving power demand of the whole vehicle is relatively high (such as high-speed overtaking or super-high-speed driving), the one-way clutch 3 is engaged, the engine 1 is separated from the fuel consumption optimal efficiency area, and at this time, the control system enables the battery pack 7 to be involved at a proper time, and provides electric energy for the hub motor 8, so as to form a parallel connection mode with the engine 1 to drive the vehicle to run. In this mode the in-wheel motor 8 and the engine 1 drive the vehicle together.
In the engine direct-drive working mode, the one-way clutch 3 is combined, the engine 1 drives the wheels 6, the engine 1 drives the ISG motor 4 to generate power, and the ISG motor 4 adjusts the working point of the engine to be in the optimal oil consumption efficiency area. For example, at high speed cruising, the one-way clutch 3 is engaged, the engine 1 is operated, and power is directly applied to the wheels 6 to lock the engine 1 in the high efficiency region. As shown in fig. 5, if the engine 1 has a surplus of power, the ISG motor 4 serves as a generator to convert energy into electric energy, which is stored in the battery pack 7. In the mode, the hub motor 8 stops working, and the ISG motor 4 is responsible for adjusting the optimal working point of the engine.
In the kinetic energy recovery operation mode, the one-way clutch 3 is disengaged, the engine 1 and the ISG motor 4 stop operating, and the in-wheel motor 8 recovers kinetic energy and supplies electric energy to the battery pack 7. Specifically, plug-in series-parallel hybrid power system still includes: when the braking torque provided by the hub motor 8 is lower than the braking torque required, the mechanical brake supplements the braking torque difference. For example, when the vehicle is braked or decelerated, as shown in fig. 6, the one-way clutch 3 is disengaged, the engine 1 and the ISG motor 4 are stopped, and kinetic energy is recovered by the in-wheel motor 8 to supply electric energy to the battery pack 7. It should be noted that, in order to ensure the safety of the vehicle, when the braking torque provided by the driving motor (in-wheel motor 8) is insufficient, the mechanical brake will supplement the remaining braking torque.
In the parking charging mode, the one-way clutch 3 is disengaged, the engine 1 drives the ISG motor 4 to generate power, as shown in fig. 7, the generated electric energy is stored in the battery pack 7, when the electric quantity of the battery pack 7 reaches a preset value, the engine 1 is turned off, and the ISG motor 4 stops generating power. For example, when the vehicle is in a stopped state, the hybrid system may operate in a park charging mode. At this time, the one-way clutch 3 is disengaged, and the engine 1 works and drags the ISG motor 4 to generate electricity. When the electric quantity of the battery pack 7 is replenished to a set value, the engine 1 is turned off and the power generation is stopped.
In a plug-in series-parallel hybrid power system, when the electric energy generated by driving the ISG motor by the engine is larger than the electric energy required to be consumed by the hub motor, surplus electric energy is stored in the battery pack; when the electric energy generated by the ISG motor driven by the engine is smaller than the electric energy required to be consumed by the hub motor, the battery pack provides electric energy to supply the hub motor.
The plug-in series-parallel hybrid power system provided by the embodiment provides a series-parallel hybrid power system which mainly drives a hub motor and assists an engine in driving, a traditional multi-gear transmission case is not needed, the complexity of control logic of a transmission system is reduced, an energy transmission link is simplified, the energy conversion ratio is improved, and the fuel economy is greatly improved. Meanwhile, the technical scheme disclosed by the invention can better improve the integration level of the hybrid power system, so that compared with a mainstream engine and a single motor driving system, the embodiment of the invention can meet the system requirement by adopting a motor with smaller power, thereby reducing the system cost and improving the flexibility of the arrangement of the hybrid power system.
Any modification, addition, or equivalent may be made within the spirit and scope of the present invention and still fall within the scope of the present invention.

Claims (10)

1. The utility model provides a plug-in series-parallel connection hybrid power system, includes group battery, engine, wheel and vehicle control unit, its characterized in that still includes:
the device comprises a hub motor, an ISG motor, a motor controller and a one-way clutch; the ISG motor is electrically connected with the battery pack and the hub motor respectively;
the plug-in series-parallel hybrid power system comprises a plurality of working modes, wherein the plurality of working modes comprise pure electric drive, series drive, parallel drive, direct drive of an engine, kinetic energy recovery and parking charging;
the one-way clutch is used for switching the plurality of working modes;
the ISG motor is used for generating power and adjusting the working point of the engine;
the motor controller is used for controlling the hub motor and the ISG motor;
the engine is used for generating electricity or driving the wheels;
the hub motor is used for driving the wheel in a working mode except for a direct-drive working mode of the engine.
2. The plug-in series-parallel hybrid system according to claim 1, wherein in the electric-only driving operation mode, the wheel is driven by the in-wheel motor, the one-way clutch is disconnected, the engine stops operating, and the battery pack supplies electric energy to the plug-in series-parallel hybrid system.
3. The plug-in series-parallel hybrid system of claim 2, further comprising: and when the electric quantity of the battery pack is lower than a preset value, the plug-in series-parallel hybrid power system does not enter the pure electric drive working mode.
4. The plug-in series-parallel hybrid system according to claim 1, wherein in the series drive operating mode, the one-way clutch is disengaged, the in-wheel motor drives the wheel, the engine does not drive the wheel, the engine drives the ISG motor to generate electricity, the electricity generated by the ISG motor is provided to the in-wheel motor, and the ISG motor adjusts the engine operating point to be in a fuel consumption optimum efficiency region.
5. The plug-in series-parallel hybrid system according to claim 1, wherein in the parallel drive operation mode, the one-way clutch is engaged, the engine drives the wheel, and the battery pack supplies electric power to the in-wheel motor when a preset rule is met, the in-wheel motor and the engine together driving the wheel.
6. The plug-in series-parallel hybrid power system according to claim 1, wherein in the engine direct drive operating mode, the one-way clutch is engaged, the engine drives the wheels, the engine drives the ISG motor to generate power, and the ISG motor adjusts the engine operating point to be in an optimal fuel consumption efficiency region.
7. The plug-in series-parallel hybrid system according to claim 1, wherein in the kinetic energy recovery operation mode, the one-way clutch is disengaged, the engine and the ISG motor are stopped, and the in-wheel motor recovers kinetic energy and supplies electric energy to the battery pack.
8. The plug-in series-parallel hybrid system of claim 7, further comprising: when the braking torque provided by the hub motor is lower than the braking torque required, the mechanical brake supplements the braking torque difference.
9. The plug-in series-parallel hybrid system according to claim 1, wherein in the parking charge operation mode, the one-way clutch is disengaged, the engine drives the ISG motor to generate power, the generated power is stored in the battery pack, and when the charge amount of the battery pack reaches a preset value, the engine is turned off and the ISG motor stops generating power.
10. The plug-in series-parallel hybrid system according to any one of claims 1 to 9,
when the electric energy generated by the ISG motor driven by the engine is larger than the electric energy required to be consumed by the hub motor, surplus electric energy is stored in the battery pack;
when the electric energy generated by the ISG motor driven by the engine is smaller than the electric energy required to be consumed by the hub motor, the battery pack provides electric energy to supply the hub motor.
CN202210786716.3A 2022-07-04 2022-07-04 Plug-in series-parallel hybrid power system Pending CN115257348A (en)

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CN104943526A (en) * 2015-06-17 2015-09-30 山东理工大学 Plug-in right-time all-wheel-drive hybrid electric vehicle system
CN108297676A (en) * 2018-03-07 2018-07-20 武汉理工大学 A kind of mixed power automobile driving system of with wheel motor

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
CN101134438A (en) * 2007-09-27 2008-03-05 深圳先进技术研究院 Dispersion mixed motivity type articulated vehicle
CN201721312U (en) * 2010-06-21 2011-01-26 浙江吉利汽车研究院有限公司 Automotive hybrid drive system
US20130190957A1 (en) * 2012-01-20 2013-07-25 Textron Inc. Utility Vehicle With Parallel Operated Internal Combustion Engine And Electric Motor Drivetrains
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