CN107933311B - Hybrid power control system and power management unit thereof - Google Patents

Hybrid power control system and power management unit thereof Download PDF

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Publication number
CN107933311B
CN107933311B CN201610892320.1A CN201610892320A CN107933311B CN 107933311 B CN107933311 B CN 107933311B CN 201610892320 A CN201610892320 A CN 201610892320A CN 107933311 B CN107933311 B CN 107933311B
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power
control
hybrid
management unit
electrical network
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CN107933311A (en
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刘强
孔令伟
何召朋
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United Automotive Electronic Systems Co Ltd
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United Automotive Electronic Systems Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L3/00Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L15/00Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00Control systems specially adapted for hybrid vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00Converter types
    • B60L2210/10DC to DC converters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/42Drive Train control parameters related to electric machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/44Drive Train control parameters related to combustion engines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/48Drive Train control parameters related to transmissions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/52Drive Train control parameters related to converters
    • B60L2240/527Voltage
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/54Drive Train control parameters related to batteries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00Output or target parameters relating to a particular sub-units
    • B60W2710/06Combustion engines, Gas turbines
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility

Abstract

The invention provides a hybrid power control system and a power management unit thereof, wherein the power management unit comprises a power topology unit and a power micro-control unit, wherein: the power micro-control unit comprises a direct current converter control module and a hybrid power control module; the direct current converter control module controls the power topology unit; the hybrid control module and the direct current converter control module share the same hardware equipment and bottom layer software. In the hybrid power control system provided by the invention, the power management unit reduces the cost of the 48V finished vehicle system in a mode of not increasing an additional controller by upgrading the control software and hardware of the traditional direct current converter, and simultaneously realizes the decoupling of power transmission control and electric network control to a certain extent by standardizing the functional module and the interface, thereby improving the flexibility, the development efficiency and the quality of the 48V finished vehicle system integration.

Description

Hybrid power control system and power management unit thereof
Technical Field
The invention relates to the technical field of automobile electronics, in particular to a hybrid power control system and a power management unit thereof.
Background
With the development of electronic and electric technology and the higher requirements of modern automobiles on oil consumption, efficiency and environmental protection, a 48V system (namely, a 48V electric network) brings a revolution to the automobile industry, compared with the traditional 12V system (namely, a 12V electric network), the 48V system can effectively improve the efficiency of a motor, and has better user experience in the application of the engine start-stop technology, meanwhile, the 48V system can more effectively recover the braking energy of an automobile compared with the 12V system, the oil saving rate of about 10 percent is improved while providing energy for the automobile electric appliances which are different day by day, and the 48V technology becomes the trend of market development. Similar to a high-voltage hybrid power system, the DC/DC converter is an indispensable component of a 48V low-voltage hybrid power system, can convert electric energy output by a 48V motor or a 48V lithium battery into 12V, and simultaneously provides pure current to supply power to a 12V load electrical appliance so as to realize power and voltage conversion between a 12V voltage network and a 48V voltage network.
As shown in fig. 1 and 2, fig. 1 and 2 show a hybrid control system according to the related art. In the current 48V low voltage hybrid system and its electrical network and control system, the DC/DC converter is only used as a power conversion module for connecting the 12V electrical network and the 48V electrical network, and the low voltage hybrid control function module needs to be integrated into the existing engine control unit (hereinafter abbreviated as ECU) in fig. 1, or a separate hybrid controller (hereinafter abbreviated as HCU) as shown in fig. 2.
The system topology of fig. 1 integrates low-pressure hybrid control related functional modules into the ECU. Fig. 2 shows another solution, namely, a low-pressure hybrid control function module is separately developed into an HCU.
For the system solution of integrating engine control and hybrid control as shown in fig. 1, an ECU is required to provide an additional CAN communication bus and interface to complete communication with devices in the 48V electrical network, and the hybrid control function module occupies resources of the ECU. Because the software of the hybrid control function module is coupled with the software of the ECU, any change of the 48V electric network can cause the change of the software of the whole system, thereby increasing the development difficulty of the ECU and having poor software flexibility.
For a system solution with engine control separated from hybrid control as in fig. 2, which requires separate development of HCUs, the increase in system components leads to increased costs, thereby undermining the cost-to-performance advantage of 48V electrical networks.
Therefore, it is desirable to design a simple and flexible hybrid control system.
Disclosure of Invention
The invention aims to provide a hybrid power control system and a power management unit thereof, which aim to solve the problem that the existing hybrid power control system is complex to develop and use.
In order to solve the above technical problem, the present invention provides a power management unit, where the power management unit is used in a hybrid power system, and is characterized in that the power management unit includes a power topology unit and a power micro control unit, where:
the power topological unit is used for power conversion in a hybrid power system;
the power micro-control unit comprises a direct current converter control module and a hybrid power control module; wherein: the direct current converter control module controls the power topology unit; the hybrid control module is used for power control, monitoring and communication in a hybrid system.
Optionally, in the power management unit, the hybrid system includes an engine system, a 12V electrical network, and a 48V electrical network, wherein:
the engine system is connected with the 48V electric network through the power management unit;
the 48V electrical network is connected to the 12V electrical network through the power management unit.
Optionally, in the power management unit, the power topology unit is used for power conversion between the 48V electrical network and the 12V electrical network.
Optionally, in the power management unit, the hybrid control module includes a powertrain control interface module for communicating with the engine system.
Optionally, in the power management unit, the hybrid control module further includes an electric drive and energy control module for energy distribution and management of motors, batteries and loads in the 48V electrical network and the 12V electrical network.
Optionally, in the power management unit, the hybrid control module further includes a vehicle communication module, which is used for communication between the motor, the battery and the load in the 48V electrical network and the 12V electrical network.
Optionally, in the power management unit, a communication protocol of the vehicle communication module is a CAN bus communication protocol.
Optionally, in the power management unit, the hybrid control module further includes a system power-up and power-down module, which is used for controlling the time and sequence of power up and down of the motor, the battery and the load in the 48V electrical network and the 12V electrical network.
Optionally, in the power management unit, the hybrid control module further includes a hybrid system monitoring module, which is used for monitoring the motor, the battery and the load in the 48V electrical network and the 12V electrical network.
The present invention also provides a hybrid control system for controlling a hybrid system, the hybrid control system comprising a transmission micro-control unit and a power management unit, wherein:
the transmission micro-control unit comprises a power transmission control module and an engine control module and is used for controlling power transmission, output and distribution in the hybrid power system;
the power management unit is connected with the power transmission control module and is used for power control, monitoring and communication in the hybrid power system.
Optionally, in the hybrid control system, the hybrid system includes an engine system, a 12V electrical network, and a 48V electrical network, wherein:
the engine system is connected with the 48V electric network through a power management unit of the hybrid power control system;
the 48V electrical network is connected to the 12V electrical network through a power management unit of the hybrid control system.
Optionally, in the hybrid control system, the power transmission control unit is configured to implement torque coordination of a 48V electrical network with the engine system.
Optionally, in the hybrid control system, the engine control unit is used for controlling, monitoring and communicating the engine system.
The invention designs a power management unit for a 48V low-voltage hybrid power control system based on a traditional direct current converter control unit based on a whole vehicle electronic and electric appliance framework, and the power management unit enables the electric network control function of the hybrid power control unit to independently exist in the direct current converter control unit through the function decoupling of power transmission control and electric network control, so that the direct current converter control unit is converted into the power management unit. The upgraded software and hardware functions can independently manage the whole 48V electric network subsystem, and the 48V whole vehicle control system is formed by the cooperation of a standard interface and a power transmission control unit.
Compared with the existing direct current converter control technology, the invention integrates the electric network control software of hybrid power control on the basis of the existing DC/DC direct current converter software, the part of software shares the bottom layer software with the original DC/DC direct current converter, the basic functions of the original DC/DC direct current converter are kept independent, and the data interaction is carried out with the electric network control software through the internal interface. Meanwhile, a special interface module is designed to realize the communication between the power management unit and other control units in the electronic and electric appliance architecture.
In the hybrid power control system provided by the invention, the power management unit reduces the cost of the 48V finished vehicle system in a mode of not increasing an additional controller by upgrading software and hardware of a traditional DC/DC direct current converter, and simultaneously realizes decoupling of power transmission control and electric network control to a certain extent by standardizing a functional module and an interface, thereby improving the flexibility, development efficiency and quality of integration of the 48V finished vehicle system.
Drawings
FIG. 1 is a schematic diagram of a prior art hybrid control system;
FIG. 2 is a schematic diagram of a prior art hybrid control system;
FIG. 3 is a circuit topology diagram according to an embodiment of the present invention;
FIG. 4 is a circuit topology diagram of a second embodiment of the present invention;
shown in the figure: 10-an engine system; an 11-48V electrical network; 12-12V electrical network; 13-an engine control module; 14-DC/DC converter; 15-a dc converter control module; 16-a power topology module; 17-a hybrid control function module; 20-an engine system; 21-48V electrical network; 22-12V electrical network; 23-an engine control module; a 24-DC/DC converter; 25-a dc converter control module; 26-a power topology module; 27-hybrid control function module (hybrid controller); 3-a hybrid power system; 30-a power topology unit; a 31-48V electrical network; a 32-12V electrical network; 33-a power micro control unit; 331-underlying software architecture; 34-a direct current converter control module; 35-a hybrid control module; 351-a powertrain control interface module; 352-electric drive and energy control module; 353, a whole vehicle communication module; 354-system power-up and power-down modules; 355-a hybrid system monitoring module; 36-a power transmission control module; 37-an engine control module; 38-an engine system; 39-a power management unit; 4-a hybrid power system; 41-48V electric network; a 42-12V electrical network; 43-a hybrid control system; 431-a power management unit; 432-a power transmission control module; 433-an engine control module; 434-drive micro control unit; 44-engine system.
Detailed Description
The hybrid power control system and the power management unit thereof according to the present invention will be further described in detail with reference to fig. 3 to 4 and the specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
The core idea of the invention is to provide a power management unit for a 48V hybrid control system.
Based on the power management unit, the invention provides a simple and flexible hybrid power control system which comprises an engine control unit, a power transmission control unit and a power management unit.
< example one >
As shown in fig. 3, fig. 3 is a circuit topology diagram of the present embodiment. The present embodiment provides a power management unit 39 of a hybrid system 3, the power management unit 39 of the hybrid system 3 includes a power topology unit 30 and a power micro control unit 33, wherein: the power topology unit 30 is used for power conversion in the hybrid power system 3, and the power micro control unit 33 includes a dc converter control module 34 and a hybrid power control module 35; the dc converter control module 34 controls the power topology unit 30; the hybrid control module 35 is used for power control, monitoring and communication in the hybrid system 3; the hybrid control module 35 and the dc converter control module 34 share the same hardware device, i.e. the microcontroller where the power micro-control unit 33 is located; in addition, the hybrid control module 35 and the dc converter control module 34 share the underlying software architecture 331 in the power micro-control unit 33 in terms of software.
In this embodiment, the power management unit 39 integrates the functions of the original hybrid control module into the original dc converter control module, and by sharing bottom layer software, the basic functions of the dc converter control module 34 are kept independent, and the power management unit 39 reduces the cost of the 48V vehicle system by upgrading the software and hardware of the conventional dc converter control module 34 without adding an additional controller.
Further, a power management unit 39 of the hybrid system 3 is used to control the hybrid system 3. Hybrid system 3 further includes an engine system 38, a 12V electrical network 32, and a 48V electrical network 31, wherein: the engine system 38 is connected to the 48V electrical network 31 through a power management unit 39 of the hybrid system 3; the 48V electrical network 31 is connected to the 12V electrical network 32 through a power management unit 39 of the hybrid system. The power topology unit 30 is used for power conversion between the 48V electrical network 31 and the 12V electrical network 32.
Specifically, in the power management unit 39 of the hybrid control system, the hybrid control module 35 includes: the power transmission system control interface module 351 is used for communicating with the engine system 38, the power transmission system control interface module 351 needs to acquire the state information of the engine system 38, so that the power transmission system control interface module 351 is connected with the power transmission control unit 36, and the engine control unit 37 acquires the state information of the engine system 38 and transmits the state information to the power transmission system control interface module 351 by the power transmission control unit 36; an electric drive and energy control module 352 for energy distribution and management of the motors, batteries and loads in the 48V electrical network 31 and the 12V electrical network 32; a vehicle-wide communication module 353 for communication of motors, batteries and loads in the 48V electrical network 31 and the 12V electrical network 32; a system power-up and power-down module 354 for controlling the timing and sequence of power up and down of motors, batteries and loads in the 48V electrical network 31 and the 12V electrical network 32; a hybrid system monitoring module 355 for diagnosis and monitoring of motors, batteries, and loads in the 48V electrical network 31 and the 12V electrical network 32. The communication protocol of the whole vehicle communication module 353 is a CAN bus communication protocol.
The power management unit 39 has, but is not limited to, the following functions: a power transmission control standard interface; electric drive and energy management; CAN communication of the whole vehicle; managing power on and off of the system; hybrid system diagnostics and monitoring. If other control and communication functions are needed, more control and communication functions can be realized by expanding the IO interface. For example: alarm function, LCD screen display and touch screen input function, key function, communication function with mobile device, etc.
As shown in fig. 3, the system decoupling solution of the power transmission control module 36(powertrain) and the hybrid control module 35(powernet) is that the functions of the hybrid control system related to the power transmission control module 36(powertrain) are still integrated in the engine control module 37, and the functions of the hybrid control system related to the hybrid control module 35(powernet) are integrated in the dc converter control module 34.
In the embodiment, data interaction between the DC/DC converter control software and the electrical network control software is completed through the internal interface of the microcontroller, and meanwhile, a special interface module is designed to realize communication between the power management unit 39 and other control units in the electronic and electrical appliance architecture, such as the power transmission control module 36.
The whole hardware system of the embodiment is divided into 3 parts:
the power topology unit 30 is a module for realizing power conversion between the 48V electric network 31 and the 12V electric network 32 by the original DC/DC direct current converter product, and is kept unchanged in the power management unit 39;
the power micro-control unit 33 mainly includes a calculation and control unit, a signal acquisition and control unit, an external interface, and the like, which are shared by the original dc converter control module 34 and the hybrid power control module 35, and the hardware of which is basically kept unchanged;
newly adding an interface module: according to the actual system requirements, the part is an optional module, and an IO interface can be expanded or a microcontroller can be upgraded according to actual requirements, so that the performance is improved.
The embodiment is based on a whole vehicle electronic and electric appliance framework, a power management unit for a 48V low-voltage hybrid power control system is designed by upgrading software and hardware on the basis of a traditional direct current converter control unit, and the power transmission control function and the electric network control function are decoupled, so that the electric network control function of the hybrid power control unit independently exists in the direct current converter control unit, and the direct current converter control unit is converted into the power management unit. The upgraded software and hardware functions can independently manage the whole 48V electric network subsystem, and the 48V whole vehicle control system is formed by the cooperation of a standard interface and a power transmission control unit.
< example two >
As shown in fig. 4, the present embodiment provides a hybrid control system 43, where the hybrid control system 43 is used for controlling the hybrid system 4, and includes a transmission micro-control unit 434 and a power management unit 431, where the transmission micro-control unit 434 includes a power transmission control module 432 and an engine control module 433, and is used for controlling power transmission, output and distribution in the hybrid system 4; the power transmission control module 432 and the engine control module 433 share the same hardware equipment and bottom layer software, so that the system cost is not increased; the power management unit 431 is connected to the powertrain control module 432 for power control, monitoring and communication in the hybrid powertrain 4.
Specifically, hybrid powertrain system 4 includes an engine system 44, a 12V electrical network 42, and a 48V electrical network 41, wherein: the engine system 44 is connected to the 48V electrical network 41 through a power management unit 431 of the hybrid control system 43; the 48V electrical network 41 is connected to the 12V electrical network 42 via a power management unit 431 of the hybrid control system 43. The powertrain control module 432 is used to implement the 48V electrical network 41 torque coordination with the engine system 44. The engine control module 433 is used for control, monitoring, and communication of the engine system 44.
The power management unit 431 has, but is not limited to, the following functions: a power transmission control standard interface; electric drive and energy management; CAN communication of the whole vehicle; managing power on and off of the system; hybrid system diagnostics and monitoring. If other control and communication functions are needed, more control and communication functions can be realized by expanding the IO interface. For example: alarm function, LCD screen display and touch screen input function, key function, communication function with mobile device, etc.
The system decoupling solution of the powertrain control module 432(powertrain) and the hybrid control module (powernet) is that the functions of the hybrid control system 43 related to the powertrain control module (powertrain) are still integrated in the powertrain micro-control unit 434, and the functions of the hybrid control system 43 related to power management, monitoring and communication (powernet) are integrated in the central power management unit 431.
In the hybrid power control system 43 provided in this embodiment, the power management unit 431 reduces the cost of the 48V vehicle system by upgrading software and hardware of the control unit of the conventional dc converter without adding an additional controller, and simultaneously, the decoupling of the power transmission control module 432 and the control unit of the 48V electric network 41, that is, the power management unit 431, is realized to a certain extent by standardizing the functional modules and the interfaces, so as to improve the flexibility, the development efficiency, and the quality of the integration of the 48V vehicle system.
The technical scheme of the invention can also be used for different hybrid power topological structures, and can also be used for high-voltage hybrid power systems and other multi-voltage systems, and the technical scheme belongs to the protection scope of the invention.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims (13)

1. A power management unit for a hybrid powertrain system, the power management unit comprising a power topology unit and a power micro-control unit, wherein:
the power topological unit is used for power conversion in a hybrid power system;
the power micro-control unit comprises a direct current converter control module and a hybrid power control module; wherein the DC converter control module controls the power topology unit; the hybrid control module is used for power control, monitoring and communication in a hybrid system.
2. The power management unit of claim 1, wherein the hybrid powertrain system comprises an engine system, a 12V electrical network, and a 48V electrical network, wherein:
the engine system is connected with the 48V electric network through the power management unit;
the 48V electrical network is connected to the 12V electrical network through the power management unit.
3. The power management unit of claim 2, wherein the power topology unit is for power conversion between the 48V electrical network and the 12V electrical network.
4. The power management unit of claim 3, wherein the hybrid control module includes a powertrain control interface module for communicating with the engine system.
5. A power management unit according to claim 3, wherein the hybrid control module further comprises an electric drive and energy control module for energy distribution and management of motors, batteries and loads in the 48V electrical network and the 12V electrical network.
6. The power management unit of claim 3, wherein the hybrid control module further comprises a full vehicle communication module for communication of motors, batteries and loads in the 48V electrical network and the 12V electrical network.
7. The power management unit of claim 6, wherein the communication protocol of the vehicle integrity communication module is a CAN bus communication protocol.
8. The power management unit of claim 3, wherein the hybrid control module further comprises a system power-up and power-down module for controlling the timing and sequence of power-up and power-down of motors, batteries, and loads in the 48V electrical network and the 12V electrical network.
9. The power management unit of claim 3, wherein the hybrid control module further comprises a hybrid system monitoring module for monitoring motors, batteries, and loads in the 48V electrical network and the 12V electrical network.
10. A hybrid control system for controlling a hybrid system, the hybrid control system comprising a transmission micro-control unit and a power management unit as claimed in any one of claims 1 to 9, wherein:
the transmission micro-control unit comprises a power transmission control module and an engine control module and is used for controlling power transmission, output and distribution in the hybrid power system;
the power management unit is connected with the power transmission control module and is used for power control, monitoring and communication in the hybrid power system.
11. The hybrid control system of claim 10, wherein the hybrid system comprises an engine system, a 12V electrical network, and a 48V electrical network, wherein:
the engine system is connected with the 48V electric network through a power management unit of the hybrid power control system;
the 48V electrical network is connected to the 12V electrical network through a power management unit of the hybrid control system.
12. A hybrid control system as set forth in claim 11 wherein said powertrain control unit is configured to effect torque coordination of the 48V electrical network with the engine system.
13. A hybrid control system as set forth in claim 11 wherein said engine control unit is used for engine system control, monitoring and communication.
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