Depth integrated high-voltage system of extended-range vehicle and power-on and power-off control method

Abstract

The invention discloses a deep integrated high-voltage system of an extended-range vehicle and a power-on and power-off control method, and relates to the field of new energy high-voltage control. The system comprises a power domain controller, a range extender system, a driving system, a power battery system, a charging system, a thermal management system and a high-voltage auxiliary driving system; the power domain controller is used for integrating control functions of a whole vehicle controller, a battery management controller, a range extending controller and a motor controller on a vehicle so as to realize control management of the whole vehicle; the range extender system is used for executing a control instruction of the power domain controller so as to charge the power battery; the driving system is used for driving the vehicle and recovering braking energy; the power battery system is used for providing electric energy input for the whole vehicle; and the charging system is used for charging the power battery system. The hardware cost of the whole vehicle can be reduced, and later maintenance and upgrading are facilitated.

Description

Technical Field

[0001] The present application relates to the field of new energy high-voltage control, and specifically to a deeply integrated high-voltage system and a method for controlling power on and off of an extended-range vehicle. Background Art

[0002] Plug-in extended-range vehicles that can run on pure electricity or hybrid electric power are becoming more and more popular among consumers. The high-voltage system of extended-range electric vehicles adds a range extender system on the basis of pure electric power. Although it increases the vehicle's driving range, the increase in the number of vehicle parts leads to increased weight, increased costs, complex layout structures, and more complex vehicle control systems. Therefore, it is more important to have a more integrated high-voltage system and a safer and more stable power-on and power-off control logic.

[0003] At present, major OEMs are also seeking development in the direction of high-voltage system integration, but they all achieve physical integration by integrating multiple sub-components through a shared shell in structure. Each sub-component is still independently controlled, and is only assembled through structural design to achieve integration. It can be seen that the existing high-voltage system integration technology solution only achieves simple physical integration, and each sub-component is still independently developed and controlled, and mainly relies on structural design for assembly and integration.

[0004] It can be seen that the existing extended-range vehicle high-voltage system has a low integration depth, and the generally adopted integrated control method is physical-level integration, that is, multiple sub-components share a shell, which makes it large in size, high in development cost, and there are also many problems with cost and qualification rate, which makes the whole vehicle high-voltage system have many wiring connections, complex layout, and high manufacturing cost; and each module of the existing extended-range vehicle high-voltage system is generally controlled by a separate ECU (Electronic Control Unit), and information is exchanged with each module ECU through the VCU (Vehicle Control Unit), resulting in a high bus load rate and poor anti-interference performance, and multiple sub-components are independent supply chains, which brings inconvenience to subsequent fault maintenance upgrades and BOM (Bill of Materials) management. Summary of the invention

[0005] The present application provides a deeply integrated high-voltage system and power-on and power-off control method for an extended-range vehicle, which can reduce the hardware cost of the entire vehicle and facilitate subsequent maintenance and upgrades.

[0006] In a first aspect, an embodiment of the present application provides a deeply integrated high-voltage system for an extended-range vehicle, the deeply integrated high-voltage system for the extended-range vehicle comprising:

[0007] The power domain controller is used to integrate the control functions of the vehicle controller, battery management controller, range extender controller and motor controller on the vehicle to achieve control management of the entire vehicle;

[0008] A range extender system, which is used to execute control instructions of the power domain controller to charge the power battery;

[0009] A drive system, which is used to drive the vehicle and recover braking energy;

[0010] Power battery system, which is used to provide power input for the entire vehicle;

[0011] A charging system, which is used to charge the power battery system;

[0012] Thermal management system, which is used to control the temperature of the engine, power battery, drive motor and cab air conditioning;

[0013] The high-voltage auxiliary drive system is used to control the power steering system and braking system of the vehicle.

[0014] In combination with the first aspect, in one implementation, the power domain controller includes an MCU, a power management module, a communication module, a signal conditioning module, a vehicle and thermal management control module, a battery management module, and an engine and motor control module.

[0015] In combination with the first aspect, in one implementation,

[0016] The MCU is used to coordinate the thermal management, battery management, engine and drive motor of the vehicle;

[0017] The MCU includes a Flash module, an RTC module, and a security monitoring module;

[0018] The Flash module is used to store and access battery pack information, vehicle information, engine information, and drive motor information;

[0019] The RTC module is used to control the operating frequency of the MCU, obtain the current time information, and collect information and estimate the time of the engine, vehicle, drive motor, and battery pack;

[0020] The security monitoring module is used to perform real-time monitoring and fault detection on the power domain controller to ensure the communication security between modules in the power domain controller.

[0021] In combination with the first aspect, in one implementation,

[0022] The power management module is used to convert and adjust the power supply voltage to supply power to the power domain controller and wake up the MCU;

[0023] The communication module is used to realize information interaction between the power domain controller and other systems in the deeply integrated high-voltage system;

[0024] The signal conditioning module is used to receive various sensor signals and switch signals on the vehicle and input them into the MCU.

[0025] In combination with the first aspect, in one implementation,

[0026] The vehicle and thermal management control module is used to execute the vehicle thermal management control instructions issued by the MCU, and feed back the vehicle thermal management status to the MCU, so as to realize the functions of gear management, accessory management, driving mode recognition and vehicle diagnosis of the vehicle;

[0027] The battery management module is used to execute the power battery system control instructions issued by the MCU, and feed back the execution status and real-time status of the power battery system to the MCU, so as to realize the functions of vehicle energy management, charging control, power on and off management and power battery diagnosis;

[0028] The engine and motor control module is used to execute the engine and drive motor control instructions issued by the MCU, and realize the functions of engine control, drive motor control, torque arbitration, energy recovery strategy and control diagnosis.

[0029] In a second aspect, an embodiment of the present application provides a power-on control method for an extended-range vehicle, which is implemented based on the above-mentioned deeply integrated high-voltage system. The power-on control method for the extended-range vehicle includes:

[0030] Wake up the power domain controller to conduct self-checks of each system in the deeply integrated high-voltage system and the vehicle status;

[0031] When it is determined that the power-on preconditions are met, the power domain controller requests the main negative relay to close;

[0032] If and only if there is no high voltage control prohibited on the vehicle, the vehicle insulation is normal and the main negative relay is closed, the power domain controller controls the GCU positive relay, the air conditioner positive relay and the main drive positive relay to close, so as to realize power-on on the corresponding branch;

[0033] Among them, when the vehicle power-on request is valid, the vehicle maintenance switch is valid, the vehicle has no insulation fault, the vehicle has no adhesion fault and the vehicle has an interlocking fault, the power-on preconditions are met.

[0034] In combination with the second aspect, in one implementation, the power domain controller controls the GCU positive relay, the air conditioner positive relay, and the main drive positive relay to close to realize power-on of the corresponding branch, specifically including:

[0035] The power domain controller sends a GCU positive relay closing request. When the range extender system is powered on successfully, the high voltage on the range extender system branch is completed.

[0036] The power domain controller sends a request to close the positive relay of the air conditioner. When the air conditioner branch is powered on successfully, the power domain controller sends a control instruction to the drive system, and the high voltage on the air conditioner branch is completed;

[0037] After the power domain controller controls the positive relay of the high-voltage auxiliary drive system to close, the power domain controller sends a request to close the main drive positive relay. When the main drive positive relay is closed, the handbrake is effective and the vehicle is currently in neutral, the high voltage on the drive motor controller is completed.

[0038] In a third aspect, an embodiment of the present application provides a power-off control method for a drive system of an extended-range vehicle, which is implemented based on the above-mentioned deeply integrated high-voltage system. The power-off control method for a drive system of an extended-range vehicle includes:

[0039] When it is detected that the key is in the OFF position, the vehicle speed is less than the set speed and the vehicle maintenance switch is valid, the drive motor power-off control process is entered;

[0040] After determining that the speed of the drive motor is less than the calibrated value, the main drive positive relay is cut off and the high voltage action is executed;

[0041] When the main drive positive relay is disconnected and the DC voltage of the drive motor is less than the set voltage, the drive system is controlled to power off at low voltage and enter sleep mode.

[0042] In a fourth aspect, an embodiment of the present application provides a power-off control method for a range extender system of an extended-range vehicle, which is implemented based on the above-mentioned deep integrated high-voltage system. The power-off control method for the range extender system of the extended-range vehicle specifically includes:

[0043] When it is detected that the key is in the OFF position, the vehicle speed is less than the set speed and the vehicle maintenance switch is valid, the range extender system power-off control process is entered;

[0044] The range extender system responds to the power-off request, and when the generator stops running, it cuts off the positive relay of the generator, and the generator power-off control is completed.

[0045] In a fifth aspect, an embodiment of the present application provides a power-off control method for a thermal management system of an extended-range vehicle, which is implemented based on the above-mentioned deeply integrated high-voltage system. The power-off control method for a thermal management system of an extended-range vehicle specifically includes:

[0046] When it is detected that the key is in the OFF position, the vehicle speed is less than the set speed and the vehicle maintenance switch is valid, the air conditioner power-off control process is entered;

[0047] The air conditioner responds to the power-off request, and when the air conditioner compressor stops running, the air conditioner positive relay is cut off, and the air conditioner power-off control is completed.

[0048] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:

[0049] The highly centralized control and management of the vehicle's high-voltage system has a faster response and higher safety. The deeply integrated high-voltage system of the present application has a streamlined architecture, which promotes the lightweight development of the vehicle, reduces the hardware cost of the vehicle, and facilitates later maintenance and upgrades. At the same time, the power on and off control method of the present invention has a more efficient and stable control timing, which improves driving safety and driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic diagram of the network architecture of the deeply integrated high-voltage system of the extended-range vehicle of this application;

[0051] Figure 2 This is a schematic diagram of the structure of the power domain controller of this application. DETAILED DESCRIPTION

[0052] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0054] In a first aspect, an embodiment of the present application provides a deeply integrated high-voltage system for an extended-range vehicle.

[0055] In one embodiment, referring to Figure 1 , Figure 1 This is a schematic diagram of the network architecture of the deeply integrated high-voltage system of the extended-range vehicle of this application. Figure 1 The deeply integrated high-voltage system shown includes: power domain controller, range extender system, drive system, power battery system, charging system, thermal management system, and high-voltage auxiliary drive system.

[0056] Specifically, the power domain controller is used to integrate the control functions of the vehicle controller, battery management controller, range extender controller and motor controller on the vehicle to achieve control management of the vehicle. That is, the power domain controller is the core part of the deeply integrated high-voltage system of this application, which integrates the control functions of the vehicle controller, battery management controller, range extender controller and motor controller, so that other high-voltage components or units of the vehicle can be uniformly managed and controlled, simplifying the logic of power on and off and responding faster.

[0057] Specifically, the range extender system is used to execute the control instructions of the power domain controller to charge the power battery. The range extender system is also called the APU system, which specifically includes an engine and a generator. The operation of the engine drives the generator to work, thereby charging the power battery.

[0058] Specifically, the drive system is used to drive the vehicle and recover braking energy. The drive system includes drive motors, drive wheels and other components. The power battery system is used to provide power input for the entire vehicle. The power battery system is the energy source for the high-voltage system. The charging system is used to charge the power battery system.

[0059] Specifically, the thermal management system is used to control the temperature of the engine, power battery, drive motor and cab air conditioner. The thermal management system includes air conditioner compressor, PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor), high-voltage fan and other components. The high-voltage auxiliary drive system is used to control the power steering system and braking system of the vehicle. The high-voltage auxiliary drive system includes oil pump motor, air pump motor and other components.

[0060] See also Figure 2 As shown, it is a schematic diagram of the structure of the power domain controller, which specifically includes MCU (Microcontroller Unit), power management module, communication module, signal conditioning module, vehicle and thermal management control module, battery management module, engine and motor control module.

[0061] Specifically, the MCU is the microcontroller unit of the power domain controller, which is used to coordinate the thermal management, battery management, engine, and drive motor of the vehicle. The MCU includes a Flash (flash memory) module, an RTC (Real Time Clock) module, and a safety monitoring module; the Flash module is used to store and access battery pack information, vehicle information, engine information, and drive motor information; the RTC module is used to control the operating frequency of the MCU, as well as to obtain the current time information, collect information of the engine, vehicle, drive motor, and battery pack, and record the time of the estimated status; the safety monitoring module is used to monitor the power domain controller in real time and detect faults to ensure the communication security between the modules in the power domain controller.

[0062] For MCU, in actual application, the TC387 high-performance multi-core microcontroller can be used. This microcontroller integrates 6 cores with an operating frequency of 300MHz and a real-time computing power of 4000DMIPS. It can meet the design requirements of functional safety level ASIL-D. In addition, it also has rich peripheral resources, such as 10MBFlash, 1Gbit Ethernet and EVITAFull-compliant security modules.

[0063] Specifically, the power management module is used to convert and adjust the power supply voltage to power the power domain controller and wake up the MCU; the power management module includes system power supply and power wake-up. The system power supply is used to convert and adjust the power supply voltage to power the internal circuits and sensors of the power domain controller; the power wake-up is used to wake up the MCU, and the wake-up signal includes KL15, A+, and TBOX gateway bus.

[0064] For the power management module, in actual application, DCDC and LDO chips can be used to generate 5V, 3.3V, 1.2V and other power supplies required for internal circuits and sensors, as well as the 15V power supply required for TGBT driving.

[0065] Specifically, the communication module is used to realize information interaction between the power domain controller and other systems in the deeply integrated high-voltage system. The communication module supports CAN (Controller Area Network) communication, LIN (Local Interconnect Network) communication and Ethernet.

[0066] Specifically, the signal conditioning module is used to receive various sensor signals and switch signals on the vehicle and input them into the MCU. For sensor signals, they specifically include: engine speed sensor, pressure sensor, temperature sensor, flow sensor, liquid level sensor; vehicle electronic throttle sensor, accelerator pedal sensor, steering wheel angle sensor; power battery temperature sensor, current sensor, insulation detection signal, high voltage detection signal; vacuum pump pressure sensor, atmospheric pressure sensor; thermal management liquid level sensor, temperature and pressure sensor; drive motor speed sensor, temperature sensor, input voltage sensor, power transistor temperature sensor. For switch signals, they specifically include: key switch, cruise combination switch, driving mode switch, heater switch, air conditioning switch, gear switch, high voltage interlock switch, brake light switch, handbrake switch, etc.

[0067] Specifically, the vehicle and thermal management control module is used to execute the vehicle thermal management control instructions issued by the MCU, and feed back the vehicle thermal management status to the MCU to realize the vehicle gear management, accessory management, driving mode recognition and vehicle diagnosis functions. The vehicle and thermal management control module specifically includes: relay drive module, CAN communication module, AD signal acquisition module, digital signal input module, digital signal output module, H-bridge drive module.

[0068] For the whole vehicle and thermal management control module, if the air conditioning AC button is turned on, the whole vehicle and thermal management control module collect the digital signal of the heater switch, the air conditioning pressure switch signal, the evaporator temperature signal and the ambient temperature signal, and after signal conditioning processing, transmit them to the MCU via the CAN bus. The MCU forms a control signal through calculation processing and inputs it into the whole vehicle and thermal management control module, thereby realizing the cab air conditioning control strategy.

[0069] Specifically, the battery management module is used to execute the power battery system control instructions issued by the MCU, and feed back the execution status and real-time status of the power battery system to the MCU, realizing the functions of vehicle energy management, charging control, power up and down management, and power battery diagnosis. The battery management module specifically includes: relay drive module, CAN communication module, current detection module, high voltage detection module, A+ detection module, and daughter board communication module.

[0070] Specifically, the engine and motor control module is used to execute the engine and drive motor control instructions issued by the MCU to realize the functions of engine control, drive motor control, torque arbitration, energy recovery strategy and control diagnosis. The engine and motor control module specifically includes: high-voltage detection module, current detection module, temperature signal acquisition module, resolver signal detection module, IGBT (Insulate-Gate Bipolar Transistor) drive module.

[0071] For the engine and motor control module, in actual applications, the bus voltage and each phase current of the drive motor are collected, and the motor FOC vector control software is run by the MCU, and output to each IGBT power tube of the engine and motor control module to control the PWM (Pulse Width Modulation) frequency and duty cycle to achieve the target torque of the drive motor.

[0072] According to the different configuration requirements of the vehicle, based on the deeply integrated high-voltage system of the present application, the functions of the power domain controller can be increased or reduced. For example, in the application of pure electric vehicles, the power domain controller may only include vehicle control, thermal management control, battery management, motor control and other functions. Only the software of the power domain controller needs to be updated, thus shortening the vehicle development cycle.

[0073] The deeply integrated high-voltage system of the present application adopts an all-in-one power domain controller, which truly integrates the functions of vehicle control, battery management, thermal management control, and motor and generator control, thereby simplifying the electrical architecture of the high-voltage system, reducing the number of vehicle controllers, simplifying the vehicle wiring harness layout, and improving the stability of the vehicle's high-voltage system; the power domain controller has richer hardware resources, more complete data utilization, can match more vehicle models, and has higher applicability. At the same time, it helps the integration and management of vehicle control software, shortens the vehicle development cycle, facilitates later software optimization and upgrades, and greatly reduces the manufacturing and after-sales costs of the vehicle; the present application optimizes the upper and lower power control logic, and the upper and lower power of the vehicle are uniformly managed by the power domain controller, reducing information transmission between different ECUs, with fast response time and higher stability; it clarifies the processing mechanism under emergency response conditions and enhances the safety and reliability of the vehicle.

[0074] In a second aspect, an embodiment of the present application further provides a power-on control method for an extended-range vehicle, which is implemented based on the above-mentioned deeply integrated high-voltage system. The power-on control method for the extended-range vehicle includes:

[0075] S11: Wake up the power domain controller and perform self-checks on the status of each system in the deeply integrated high-voltage system and the entire vehicle;

[0076] In actual application, the wake-up condition of the power domain controller is that when the vehicle is charging, it is awakened by the A+ signal; when the vehicle is not charging, it is awakened based on the key KL15 hard line or awakened through the gateway bus based on TBOX. When the power domain controller wakes up, it will perform self-inspection of each system and the vehicle status in the deeply integrated high-voltage system. If the self-inspection passes, the subsequent steps will be carried out. If the self-inspection fails, it will be re-inspected and the reason for the failure will be found.

[0077] S12: When it is determined that the power-on precondition is met, the power domain controller requests the main negative relay to close;

[0078] Specifically, when the vehicle power-on request is valid, the vehicle maintenance switch is valid, the vehicle has no insulation fault, the vehicle has no adhesion fault and the vehicle has an interlocking fault, the power-on preconditions are met and the power domain controller requests the main negative relay to close; otherwise, the power-on preconditions are not met.

[0079] S13: When and only when there is no prohibition of high voltage control on the vehicle, the insulation of the vehicle is normal and the main negative relay is closed, the power domain controller controls the GCU positive relay, the air conditioner positive relay and the main drive positive relay to close to realize power-on of the corresponding branch.

[0080] The power domain controller controls the GCU positive relay, air conditioner positive relay, and main drive positive relay to close, and realizes power-on of the corresponding branch, including:

[0081] The power domain controller sends a GCU (range extender generator controller) positive relay closing request. When the range extender system is powered on successfully, the high voltage on the range extender system branch is completed.

[0082] The power domain controller sends a request to close the positive relay of the air conditioner. When the air conditioner branch is powered on successfully, the power domain controller sends a control instruction to the drive system, and the high voltage on the air conditioner branch is completed;

[0083] After the power domain controller controls the positive relay of the high-voltage auxiliary drive system to close, the power domain controller sends a request to close the main drive positive relay. When the main drive positive relay is closed, the handbrake is effective and the vehicle is currently in neutral, the high voltage on the drive motor controller is completed.

[0084] In a third aspect, an embodiment of the present application further provides a power-off control method for a drive system of an extended-range vehicle, which is implemented based on the above-mentioned deep integrated high-voltage system. The power-off control method for a drive system of an extended-range vehicle includes:

[0085] S21: When it is detected that the key is in the OFF position, the vehicle speed is less than the set speed and the vehicle maintenance switch is valid, the drive motor power-off control process is entered; the set speed can be 5km / h;

[0086] S22: After determining that the speed of the drive motor is less than the calibration value, the main drive positive relay is cut off and the high voltage action is executed; the calibration value can be 100rad / min;

[0087] In actual applications, if it is determined that the speed of the drive motor is not less than the calibrated value, the vehicle enters the neutral gear and 0 speed control to complete the unloading of the drive motor.

[0088] S23: When the main drive positive relay is disconnected and the DC voltage of the drive motor is less than the set voltage, the drive system is controlled to power off at low voltage and enter sleep mode. In actual applications, if the DC voltage of the drive motor is not less than the set voltage, active discharge control is performed. The set voltage can be 60V.

[0089] In a fourth aspect, an embodiment of the present application further provides a power-off control method for a range extender system of an extended-range vehicle, which is implemented based on the above-mentioned deep integrated high-voltage system. The power-off control method for a range extender system of an extended-range vehicle includes:

[0090] S31: When it is detected that the key is in the OFF position, the vehicle speed is less than the set speed and the vehicle maintenance switch is valid, the range extender system power-off control process is entered;

[0091] S32: The range extender system responds to the power-off request, and when the generator stops running, the positive relay of the generator is cut off, and the generator power-off control is completed.

[0092] In a fifth aspect, an embodiment of the present application further provides a power-off control method for a thermal management system of an extended-range vehicle, which is implemented based on the above-mentioned deep integrated high-voltage system. The power-off control method for a thermal management system of an extended-range vehicle includes:

[0093] S41: When it is detected that the key is in the OFF position, the vehicle speed is less than the set speed and the vehicle maintenance switch is valid, the air conditioner power-off control process is entered;

[0094] S42: The air conditioner responds to the power-off request, and when the air conditioner compressor stops running, the air conditioner positive relay is cut off, and the air conditioner power-off control is completed.

[0095] Furthermore, in a sixth aspect, an embodiment of the present application further provides an electric control method for an extended-range vehicle under emergency conditions, which is implemented based on the above-mentioned deep integrated high-voltage system. The electric control method for an extended-range vehicle under emergency conditions includes:

[0096] S51: When the power domain controller is operating normally, if it detects activation of the maintenance safety switch, a signal from the safety gas sensor, an abnormal temperature signal of the power battery, and the vehicle speed is less than the set speed, the power domain controller controls each power system to shut down;

[0097] S52: The power domain controller controls each branch to disconnect the positive relay and the main negative relay. After timing for 300ms, it determines whether the relay is disconnected and the high-voltage power-off is completed. If so, the high-voltage power-off is completed.

[0098] In a sixth aspect, an embodiment of the present application provides a power-off control device for an extended-range vehicle, which is used to implement the above-mentioned power-on and power-off control method. The power-off control device for an extended-range vehicle can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0099] In an embodiment of the present application, a power-off control device for an extended-range vehicle may include a processor, a memory, a communication interface, and a communication bus.

[0100] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0101] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the AAAA device, and the interface used to realize the interconnection between the AAAA device and other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display (Display), a keyboard (Keyboard), etc.

[0102] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0103] The processor may be a general-purpose processor, and the general-purpose processor may call the AAAA program stored in the memory and execute the AAAA method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the AAAA program is called may refer to the various embodiments of the AAAA method of the present application, and will not be repeated here.

[0104] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0105] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0106] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0107] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0108] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0109] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A deeply integrated high-voltage system for an extended-range vehicle, characterized in that: The deeply integrated high-voltage system of the extended-range vehicle includes: The power domain controller is used to integrate the control functions of the vehicle controller, battery management controller, range extender controller and motor controller on the vehicle to achieve control management of the entire vehicle; A range extender system, which is used to execute control instructions of the power domain controller to charge the power battery; A drive system, which is used to drive the vehicle and recover braking energy; Power battery system, which is used to provide power input for the entire vehicle; A charging system, which is used to charge the power battery system; Thermal management system, which is used to control the temperature of the engine, power battery, drive motor and cab air conditioning; The high-voltage auxiliary drive system is used to control the power steering system and braking system of the vehicle.

2. A deeply integrated high-voltage system for an extended-range vehicle as claimed in claim 1, characterized in that: The power domain controller includes an MCU, a power management module, a communication module, a signal conditioning module, a vehicle and thermal management control module, a battery management module, and an engine and motor control module.

3. A deeply integrated high-voltage system for an extended-range vehicle as claimed in claim 2, characterized in that: The MCU is used to coordinate the thermal management, battery management, engine and drive motor of the vehicle; The MCU includes a Flash module, an RTC module, and a security monitoring module; The Flash module is used to store and access battery pack information, vehicle information, engine information, and drive motor information; The RTC module is used to control the operating frequency of the MCU, obtain the current time information, and collect information and estimate the time of the engine, vehicle, drive motor, and battery pack; The security monitoring module is used to perform real-time monitoring and fault detection on the power domain controller to ensure the communication security between modules in the power domain controller.

4. A deeply integrated high-voltage system for an extended-range vehicle as claimed in claim 2, characterized in that: The power management module is used to convert and adjust the power supply voltage to supply power to the power domain controller and wake up the MCU; The communication module is used to realize information interaction between the power domain controller and other systems in the deeply integrated high-voltage system; The signal conditioning module is used to receive various sensor signals and switch signals on the vehicle and input them into the MCU.

5. The deeply integrated high-voltage system for a range-extended vehicle according to claim 2, characterized in that: The vehicle and thermal management control module is used to execute the vehicle thermal management control instructions issued by the MCU, and feed back the vehicle thermal management status to the MCU, so as to realize the functions of gear management, accessory management, driving mode recognition and vehicle diagnosis of the vehicle; The battery management module is used to execute the power battery system control instructions issued by the MCU, and feed back the execution status and real-time status of the power battery system to the MCU, so as to realize the functions of vehicle energy management, charging control, power on and off management and power battery diagnosis; The engine and motor control module is used to execute the engine and drive motor control instructions issued by the MCU, and realize the functions of engine control, drive motor control, torque arbitration, energy recovery strategy and control diagnosis.

6. A power-on control method for an extended-range vehicle, implemented based on the deeply integrated high-voltage system according to any one of claims 1 to 5, characterized in that: The power-on control method of the extended-range vehicle includes: Wake up the power domain controller to conduct self-checks of each system in the deeply integrated high-voltage system and the vehicle status; When it is determined that the power-on preconditions are met, the power domain controller requests the main negative relay to close; If and only if there is no high voltage control prohibited on the vehicle, the vehicle insulation is normal and the main negative relay is closed, the power domain controller controls the GCU positive relay, the air conditioner positive relay and the main drive positive relay to close, so as to realize power-on on the corresponding branch; Among them, when the vehicle power-on request is valid, the vehicle maintenance switch is valid, the vehicle has no insulation fault, the vehicle has no adhesion fault and the vehicle has an interlocking fault, the power-on preconditions are met.

7. A power-on control method for an extended-range vehicle as claimed in claim 6, characterized in that: The power domain controller controls the GCU positive relay, the air conditioner positive relay, and the main drive positive relay to close, so as to realize power-on of the corresponding branch, specifically including: The power domain controller sends a GCU positive relay closing request. When the range extender system is powered on successfully, the high voltage on the range extender system branch is completed. The power domain controller sends a request to close the positive relay of the air conditioner. When the air conditioner branch is powered on successfully, the power domain controller sends a control instruction to the drive system, and the high voltage on the air conditioner branch is completed; After the power domain controller controls the positive relay of the high-voltage auxiliary drive system to close, the power domain controller sends a request to close the main drive positive relay. When the main drive positive relay is closed, the handbrake is effective and the vehicle is currently in neutral, the high voltage on the drive motor controller is completed.

8. A power-down control method for a driving system of an extended-range vehicle, implemented based on the deeply integrated high-voltage system according to any one of claims 1 to 5, characterized in that: The power-off control method of the driving system of the extended-range vehicle comprises: When it is detected that the key is in the OFF position, the vehicle speed is less than the set speed and the vehicle maintenance switch is valid, the drive motor power-off control process is entered; After determining that the speed of the drive motor is less than the calibrated value, the main drive positive relay is cut off and the high voltage action is executed; When the main drive positive relay is disconnected and the DC voltage of the drive motor is less than the set voltage, the drive system is controlled to power off at low voltage and enter sleep mode.

9. A power-off control method for a range extender system of an extended-range vehicle, implemented based on the deeply integrated high-voltage system according to any one of claims 1 to 5, characterized in that: The power-off control method of the range extender system of the extended-range vehicle specifically includes: When it is detected that the key is in the OFF position, the vehicle speed is less than the set speed and the vehicle maintenance switch is valid, the range extender system power-off control process is entered; The range extender system responds to the power-off request, and when the generator stops running, it cuts off the positive relay of the generator, and the generator power-off control is completed.

10. A power-down control method for a thermal management system of an extended-range vehicle, implemented based on the deeply integrated high-voltage system according to any one of claims 1 to 5, characterized in that: The power-off control method of the thermal management system of the extended-range vehicle specifically includes: When it is detected that the key is in the OFF position, the vehicle speed is less than the set speed and the vehicle maintenance switch is valid, the air conditioner power-off control process is entered; The air conditioner responds to the power-off request, and when the air conditioner compressor stops running, the air conditioner positive relay is cut off, and the air conditioner power-off control is completed.

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