A whole vehicle control system for a hydrogen fuel cell vehicle and a vehicle

Abstract

The present invention provides a whole vehicle control system and vehicle for a hydrogen fuel cell vehicle, belonging to the technical field of hydrogen fuel cell vehicle network topology. The whole vehicle control system of the hydrogen fuel cell vehicle includes: a whole vehicle controller for obtaining power-related information and driving-related information; a power battery control system for obtaining battery power and the battery's charge and discharge capabilities; a hydrogen fuel cell system controller connected to both the whole vehicle controller and the power battery control system, for determining whether to start the hydrogen fuel cell based on the power-related information and the driving-related information, and calculating the target output power of the hydrogen fuel cell based on the power-related information, the battery power and the battery's charge and discharge capabilities after the hydrogen fuel cell is started. The present invention also provides a vehicle including the above-mentioned whole vehicle control system. The whole vehicle control system and vehicle of the hydrogen fuel cell vehicle of the present invention can greatly reduce development costs and development difficulty.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cell vehicle network topology structure, and in particular to a whole vehicle control system of a hydrogen fuel cell vehicle and the vehicle. Background Art

[0002] Fuel cells are a unique segment of the automotive industry. From an outside perspective, fuel cell electric vehicle control solutions are considered either pure electric vehicles, hybrid vehicles, or extended-range electric vehicles. Regardless of the type, the hardware components within the vehicle are not as diverse as hybrid systems; they are limited to extended-range versions. This is because, relative to the vehicle, the fuel cell acts as an additional generator. The electricity it generates contributes to combined propulsion (hybrid power) and battery charging (extended-range), but the actual propulsion of the vehicle is provided by the drive motor (pure electric vehicle). Because of this unique structure, the development of integrated vehicle control solutions generally relies on the vehicle controller (VCU) as the top-level vehicle power control layer to coordinate and manage the power of the fuel cell and the high-voltage power battery. Under the existing pure electric vehicle software control architecture, post-development inevitably requires numerous modifications to the controller software functions, increasing the cost and complexity of software development and testing. Summary of the Invention

[0003] One purpose of the first aspect of the present invention is to provide a whole vehicle control system for a hydrogen fuel cell vehicle that can greatly reduce development costs and difficulty.

[0004] An object of the second aspect of the present invention is to provide a vehicle comprising the above-mentioned vehicle control system.

[0005] In particular, the present invention provides a whole vehicle control system for a hydrogen fuel cell vehicle, comprising:

[0006] Vehicle controller, used to obtain power-related information and driving-related information;

[0007] Power battery control system, used to obtain battery power and battery charging and discharging capabilities;

[0008] A hydrogen fuel cell system controller is connected to both the vehicle controller and the power battery control system, and is used to determine whether to start the hydrogen fuel cell based on the power-related information and the driving-related information, and after the hydrogen fuel cell is started, calculate the target output power of the hydrogen fuel cell based on the power-related information, the battery power and the battery's charge and discharge capabilities.

[0009] Optionally, the power battery control system includes a battery energy controller and a three-in-one charging controller.

[0010] Optionally, the vehicle control system further includes:

[0011] The hydrogen supply management controller is connected to the hydrogen fuel cell system controller and is used to manage hydrogen according to the control instructions of the hydrogen fuel cell system controller.

[0012] Optionally, the hydrogen fuel cell system controller is used to determine whether the vehicle is in a parked state and hydrogen refueling is allowed, and control the hydrogen cover to open when the vehicle is in a parked state and hydrogen refueling is allowed;

[0013] The hydrogen supply management controller is used to complete hydrogenation by interacting with the hydrogen filling machine when the hydrogen cover is opened.

[0014] Optionally, the hydrogen fuel cell system controller is further configured to control power on and off of itself and the hydrogen supply management controller according to power on and off status information of the vehicle controller.

[0015] Optionally, the hydrogen fuel cell system controller is also connected to each functional device of the hydrogen fuel system, and is used to send corresponding control instructions to each functional device.

[0016] Optionally, the functional controller includes an air compressor controller, a boost DCDC, a hydrogen supply management controller, a stack water pump, a hydrogen circulation pump and a heater.

[0017] Optionally, the vehicle control system further includes:

[0018] A vehicle thermal management system connected to the hydrogen fuel cell system controller;

[0019] The hydrogen fuel cell system controller is used to send thermal management target parameters of the hydrogen fuel system to the vehicle thermal management system, and the vehicle thermal management system controls corresponding thermal management components according to the thermal management target parameters.

[0020] Optionally, the vehicle thermal management system is also connected to the electric drive controller, the battery energy controller and the three-in-one charging controller.

[0021] In particular, the present invention also provides a vehicle comprising the whole vehicle control system of any of the hydrogen fuel cell vehicles described above.

[0022] According to one embodiment of the present invention, the hydrogen fuel cell system controller is directly connected to the vehicle controller and the power battery control system. The controller interacts with the vehicle controller and the power battery control system to determine whether to start the hydrogen fuel cell and calculate the target output power of the hydrogen fuel cell, thereby controlling the output of the hydrogen fuel cell. In other words, the hydrogen fuel cell is no longer controlled by the vehicle controller, but rather by the hydrogen fuel cell system controller interacting with the vehicle controller and the power battery control system. This is equivalent to treating the hydrogen fuel cell and its related components and controller as a whole, acting as a power battery range extender. The hydrogen fuel cell system controller controls the start and stop of the hydrogen fuel cell and the target output power based on the status of the vehicle's power battery and the operating conditions of the vehicle. This allows the hydrogen fuel cell to be used as an energy range extender to realize vehicle development without or with minimal modification to the existing pure electric vehicle architecture, significantly reducing development costs and difficulty.

[0023] According to one embodiment of the present invention, the hydrogen fuel cell system controller serves as the brain of the hydrogen fuel cell system, comprehensively controlling all hydrogen fuel cell functions, including power-up and power-down, hydrogen and oxygen path control, water humidification control, stack power generation, fault diagnosis, system safety, power control, system status determination, and thermal management. The hydrogen fuel cell system controller is added to the vehicle in an add-on fashion, allowing suppliers' fuel cell systems to be quickly incorporated into the development of the entire vehicle, reducing vehicle-level control development costs.

[0024] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0026] Figure 1 This is a connection block diagram of a whole vehicle control system of a hydrogen fuel cell vehicle according to one embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a whole vehicle control system of a hydrogen fuel cell vehicle according to another embodiment of the present invention;

[0028] Figure 3 It is a connection block diagram of a whole vehicle control system of a hydrogen fuel cell vehicle according to another embodiment of the present invention.

[0029] Reference numerals:

[0030] 100-vehicle control system, 10-vehicle controller, 20-power battery control system, 21-battery energy controller, 22-three-in-one charging controller, 30-hydrogen fuel cell system controller, 40-hydrogen supply management controller, 401-air compressor controller, 402-boost DCDC, 403-stack water pump, 404-hydrogen circulation pump, 405-heater, 41-hydrogen refueling port, 42-pressure reducing valve, 43-switch valve, 44-concentration sensor, 45-pressure relief valve, 46-hydrogen amount display, 47-infrared hydrogen refueling communication module, 50-vehicle thermal management system, 60-electric drive controller 60. DETAILED DESCRIPTION

[0031] Since the application of fuel cells in vehicles is essentially an extension of pure electric vehicles, fuel cell vehicles share all the energy management components found in pure electric vehicles, with the only difference being the presence of the fuel cell system components. Therefore, the inventors designed a power battery energy range extender solution based on existing electric vehicle architectures. They found this approach to be an effective overall vehicle functional design solution at this stage, and the control can be fully leveraged by either a self-developed fuel cell control system or a readily available control solution from a supplier. Figure 1 FIG. 1 is a connection block diagram of a whole vehicle control system 100 of a hydrogen fuel cell vehicle according to an embodiment of the present invention. Figure 1As shown, in one embodiment, the vehicle control system 100 of a hydrogen fuel cell vehicle includes a vehicle controller 10 (VUC), a power battery control system 20, and a hydrogen fuel cell system controller 30 (FCU). The vehicle controller 10 is used to obtain power-related information and driving-related information. The power-related information here includes actual driving power, target driving power, recovery target power, actual recovery power, and the actual total power consumption of vehicle accessories. The driving-related information includes information such as driving mode, throttle opening, brake signal, gear position, and vehicle speed. The power battery control system 20 is used to obtain battery power and the battery's charge and discharge capabilities. The power battery control system 20 may include a battery energy controller 21 (BECM) and a three-in-one charge controller 22 (CDD). The three-in-one charge controller 22 is a combined controller of an OBC (on-board charger), a DCDC (direct current / direct current converter), and a PDU (power distribution unit). The hydrogen fuel cell system controller 30 is connected to both the vehicle controller 10 and the power battery control system 20, and is used to determine whether to start the hydrogen fuel cell based on power-related information and driving-related information, and calculate the target output power of the hydrogen fuel cell based on power-related information, battery power, and battery charge and discharge capabilities after the hydrogen fuel cell is started. The algorithm for calculating the target output power of the hydrogen fuel cell here can be any one of the existing technologies. In one embodiment, the hydrogen fuel cell system controller 30 is a new electronic control unit added to the GEE2.0 architecture, which can be attached to the PCAN network of the VCU domain control interaction.

[0032] In this embodiment, the hydrogen fuel cell system controller 30 is directly connected to the vehicle controller 10 and the power battery control system 20. By interacting with the vehicle controller 10 and the power battery control system 20, the controller determines whether to start the hydrogen fuel cell and calculates the target output power of the hydrogen fuel cell, thereby controlling the output of the hydrogen fuel cell. In other words, the hydrogen fuel cell is no longer controlled by the vehicle controller 10, but rather by the hydrogen fuel cell system controller 30 interacting with the vehicle controller 10 and the power battery control system 20. This is equivalent to treating the hydrogen fuel cell and its related components and controller as a whole, acting as a power battery range extender. The hydrogen fuel cell system controller 30 controls the start and stop of the hydrogen fuel cell and the target output power based on the status of the vehicle's power battery and the vehicle's operating conditions. This allows the hydrogen fuel cell to be used as an energy range extender to implement vehicle development without or with minimal modification to the existing pure electric vehicle architecture, significantly reducing development costs and difficulty.

[0033] Furthermore, through interaction between the hydrogen fuel cell system controller 30 and the vehicle controller 10, the hydrogen fuel cell system controller 30 can cooperate with the vehicle controller 10 to control external discharge, including V2V and V2L discharge control. Specifically, the hydrogen fuel cell system controller 30 reads the discharge power and discharge start switch signals forwarded within the VCU domain to control the output power of the hydrogen fuel cell.

[0034] Of course, when a hydrogen fuel cell failure or abnormality occurs, the hydrogen fuel cell system controller 30 can also control the hydrogen fuel cell to stop suddenly.

[0035] Figure 2 It is a schematic diagram of a whole vehicle control system of a hydrogen fuel cell vehicle according to another embodiment of the present invention. Figure 3 FIG. 1 is a connection block diagram of a whole vehicle control system of a hydrogen fuel cell vehicle according to another embodiment of the present invention. Figure 2 As shown, in a further embodiment, the vehicle control system 100 further includes a hydrogen supply management controller 40 (HMS), which is connected to the hydrogen fuel cell system controller 30 and is used to complete hydrogen management according to the control instructions of the hydrogen fuel cell system controller 30, including hydrogen storage, hydrogenation, hydrogen safety detection, etc. The hydrogen management controller is connected to various sub-components in the hydrogen supply system, such as Figure 3 As shown, it includes a hydrogenation port 41, a pressure reducing valve 42, an on-off valve 43, a concentration sensor 44, a pressure relief valve 45, a hydrogen amount display screen 46 and an infrared hydrogenation communication module 47, etc. Figure 3 The thermal management-related LIN drive components or hardware may include compressors, three-way valves, four-way valves, electronic expansion valves, cooling water pumps, PTCs, etc., which are components for realizing thermal management loops, component cooling, component heating, and decentralized related controls.

[0036] Furthermore, the hydrogen supply management controller 40 is also used to complete the definition and switching of hydrogen management modes, where the hydrogen management modes may include hydrogenation mode, non-hydrogenation mode, hydrogenation stop mode and fault status light. The hydrogen supply management controller 40 is also used to diagnose the safety and faults of various sub-components in the hydrogen supply system, such as Figure 3 The concentration sensor 44, pressure reducing valve 45, etc. shown in the figure also include the diagnosis of insulation, hydrogen leakage, and hydrogen bottle status.

[0037] In this embodiment, the management of hydrogen in the hydrogen supply system can be completed through the interaction between the hydrogen supply management controller 40 and the hydrogen fuel cell system controller 30 .

[0038] In a further embodiment, the hydrogen fuel cell system controller 30 is used to determine whether the vehicle is in a parked state and hydrogen refueling is allowed, and to control the hydrogen cap to open when the vehicle is in a parked state and hydrogen refueling is allowed. The hydrogen fuel cell system controller 30 can read the vehicle status signal from the vehicle mode management module (VMM), VCU, vehicle thermal management system 50, battery energy controller 21 and hydrogen supply management controller 40, thereby determining whether the vehicle is parked and whether hydrogen refueling is allowed, and control the hydrogen cap to open when the vehicle is in a parked state and hydrogen refueling is allowed. The hydrogen supply management controller 40 is used to complete hydrogen refueling by interacting with the hydrogen refueling machine when the hydrogen cap is open, that is, the amount and speed of hydrogen refueling are controlled by the hydrogen supply management controller 40.

[0039] In this embodiment, the hydrogen fuel cell system controller 30 and the hydrogen supply management controller 40 cooperate to complete the hydrogen refueling function for the vehicle.

[0040] In a further embodiment, the hydrogen fuel cell system controller 30 is further configured to control the power on and off of itself and the hydrogen supply management controller 40 based on the power on and off status information of the vehicle controller 10. In other words, the hydrogen fuel cell system controller 30 coordinates the power on and off of the vehicle to control the power on and off of itself and the hydrogen supply management controller 40. Specifically, the hydrogen fuel cell system controller 30 can read information about the VCU power-on status, the HVIL (High Voltage Interlock System) determination results, whether the CAN network is awake, a power-on request, and anti-theft unlock information to determine whether to power on.

[0041] like Figure 3 As shown, in one embodiment, the hydrogen fuel cell system controller 30 is also connected to each functional component of the hydrogen fuel system to send corresponding control instructions to each functional component. The functional controller includes an air compressor controller 401, a boost DC / DC controller 402, a hydrogen supply management controller 40, a stack water pump 403, a hydrogen circulation pump 404, and a heater 405. The heater can be a PCT heater. Therefore, the hydrogen fuel cell system controller 30 can complete hydrogen circuit control (including control of hydrogen pressure and flow), power generation and humidification water circuit control, stack power generation, and thermal management control.

[0042] Furthermore, the hydrogen fuel cell system controller 30 also integrates an oxygen circuit control function, ie, the control of oxygen pressure and flow rate and the calculation of the stoichiometric ratio.

[0043] Furthermore, the hydrogen fuel cell system controller 30 is also used to control the normal startup, cold start, normal shutdown, fast startup, fault shutdown, emergency shutdown and safety management of the hydrogen fuel system.

[0044] like Figure 2As shown, in a further embodiment, the vehicle control system 100 also includes a vehicle thermal management system 50(TM), which is connected to the hydrogen fuel cell system controller 30. The hydrogen fuel cell system controller 30 is used to send the thermal management target parameters of the hydrogen fuel system to the vehicle thermal management system 50, and the vehicle thermal management system 50 controls the corresponding thermal management components according to the thermal management target parameters. The thermal management target parameters here include target temperature and target flow. In a further embodiment, the vehicle thermal management system 50 is also connected to the electric drive controller 60, the battery energy controller 21 and the three-in-one charging controller 22. Therefore, the vehicle thermal management system 50 needs to perform thermal management on the battery, electric drive mechanism and hydrogen fuel cell. Of course, further, the vehicle thermal management system 50 also needs to perform thermal management on related accessories.

[0045] Specifically, the control requirements of the vehicle thermal management system 50 mainly involve the following aspects: 1. The cooling requirements of thermal management components, including the cooling judgment of batteries, electric drives and fuel cells (i.e., hydrogen fuel cells), DCDC and OBC, air compressors, fuel cell boost DC voltage conversion (FC_DCDC), the judgment of in-vehicle air conditioning cooling requirements, and NVH limitations. 2. The heating requirements of thermal management components, including the heating judgment of batteries and fuel cells, and the judgment of in-vehicle heating requirements. 3. Thermal model mode control, including mode definition and mode jump judgment. 4. The control targets of thermal management components, including the operating parameters of thermal management components such as water pumps, fans, expansion valves, compressors, three-way valves and PTC. 5. Thermal management fault diagnosis.

[0046] The hydrogen fuel cell system controller 30 in this embodiment serves as the brain of the hydrogen fuel cell system, comprehensively controlling all hydrogen fuel cell functions, including power-up and power-down, hydrogen and oxygen path control, water humidification control, stack power generation, fault diagnosis, system safety, power control, system status determination, and thermal management. The hydrogen fuel cell system controller 30 is added to the vehicle in an add-on fashion, allowing suppliers' fuel cell systems to be quickly incorporated into the development of the entire vehicle, reducing vehicle-level control development costs.

[0047] The present invention also provides a vehicle, including the whole vehicle control system 100 of the hydrogen fuel cell vehicle in any one of the above embodiments or combinations of embodiments.

[0048] In this embodiment, the hydrogen fuel cell system controller 30 is directly connected to the vehicle controller 10 and the power battery control system 20. By interacting with the vehicle controller 10 and the power battery control system 20, the controller determines whether to start the hydrogen fuel cell and calculates the target output power of the hydrogen fuel cell, thereby controlling the output of the hydrogen fuel cell. In other words, the hydrogen fuel cell is no longer controlled by the vehicle controller 10, but rather by the hydrogen fuel cell system controller 30 interacting with the vehicle controller 10 and the power battery control system 20. This is equivalent to treating the hydrogen fuel cell and its related components and controller as a whole, acting as a power battery range extender. The hydrogen fuel cell system controller 30 controls the start and stop of the hydrogen fuel cell and the target output power based on the status of the vehicle's power battery and the vehicle's operating conditions. This allows the hydrogen fuel cell to be used as an energy range extender to implement vehicle development without or with minimal modification to the existing pure electric vehicle architecture, significantly reducing development costs and difficulty.

[0049] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A whole vehicle control system for a hydrogen fuel cell vehicle, characterized in that: include: Vehicle controller, used to obtain power-related information and driving-related information; Power battery control system, used to obtain battery power and battery charging and discharging capabilities; a hydrogen fuel cell system controller, connected to both the vehicle controller and the power battery control system, for determining whether to start the hydrogen fuel cell based on the power-related information and the driving-related information, and calculating a target output power of the hydrogen fuel cell based on the power-related information, the battery charge, and the battery's charge and discharge capabilities after the hydrogen fuel cell is started; A hydrogen supply management controller, connected to the hydrogen fuel cell system controller, for completing hydrogen management according to control instructions of the hydrogen fuel cell system controller; A vehicle thermal management system connected to the hydrogen fuel cell system controller; The hydrogen fuel cell system controller is used to send thermal management target parameters of the hydrogen fuel system to the vehicle thermal management system, and the vehicle thermal management system controls corresponding thermal management components according to the thermal management target parameters.

2. The vehicle control system according to claim 1, characterized in that: The power battery control system includes a battery energy controller and a three-in-one charging controller.

3. The vehicle control system according to claim 1, characterized in that: The hydrogen fuel cell system controller is used to determine whether the vehicle is in a parked state and hydrogen refueling is allowed, and control the hydrogen cover to open when the vehicle is in a parked state and hydrogen refueling is allowed; The hydrogen supply management controller is used to complete hydrogenation by interacting with the hydrogen filling machine when the hydrogen cover is opened.

4. The vehicle control system according to claim 1, characterized in that: The hydrogen fuel cell system controller is also used to control the power on and off of itself and the hydrogen supply management controller according to the power on and off status information of the vehicle controller.

5. The vehicle control system according to claim 1, characterized in that: The hydrogen fuel cell system controller is also connected to each functional device of the hydrogen fuel system, and is used to send corresponding control instructions to each functional device.

6. The vehicle control system according to claim 5, characterized in that: Also includes: Functional controllers include air compressor controller, boost DCDC, hydrogen supply management controller, stack water pump, hydrogen circulation pump and heater.

7. The vehicle control system according to claim 1, characterized in that: The vehicle thermal management system is also connected to the electric drive controller, battery energy controller and three-in-one charging controller.

8. A vehicle, characterized in that: A whole vehicle control system comprising a hydrogen fuel cell vehicle according to any one of claims 1 to 7.

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