Starting control method of hydrogen-electric power automobile, controller and storage medium

Abstract

The invention provides a starting control method of a hydrogen-electric power automobile, a controller and a storage medium, which are applied to a power domain controller. A hydrogen-electric system is integrated into a power domain of the whole automobile on the basis of not damaging the original framework of the whole automobile; two-way communication connection between a power domain controller in the hydrogen electric power automobile and a battery management system, a fuel cell system and a whole automobile peripheral system is established, the power domain controller serves as a control unit of a power domain to receive demand information and carry out logical operation, and finally whether a fuel electric system controller needs to be started or not is judged. The power domain controller is used for starting the hydrogen-electricity system and sending a started working instruction to the gas-electricity system controller through the communication bus, the gas-electricity system controller serves as an actuator, equipment in the gas-electricity system is started according to a design process after the working instruction of the power domain controller is received, starting of the hydrogen-electricity system is achieved, the development cost of system starting is greatly reduced, and the development period is shortened.

Description

Technical Field

[0001] The present application relates to the field of automotive control technologies, and in particular, to a starting control method, a controller, and a storage medium for a hydrogen-electric vehicle. Background Art

[0002] Hydrogen fuel has become one of the main power development directions of future new energy vehicles recognized by the industry due to its advantages such as light weight, high energy density, zero emissions, pollution-free, and recyclability. However, there are not many cases of hydrogen-electric technology being installed in passenger vehicles, resulting in the immaturity of many core functions and control strategies, and the failure to form a platformized strategic solution. Each original equipment manufacturer designs and develops independently, leading to repeated problems and low reuse rate, wasting a large amount of human and material resources, including the starting control strategy of hydrogen-electric vehicles.

[0003] Currently, for hydrogen-electric vehicles with different configurations, there is no platformized solution for the starting process control strategy of the hydrogen-electric system, resulting in low applicability, high development cost, and long development cycle. Summary of the Invention

[0004] To overcome the problems in the related art, this specification provides a method, an apparatus, a device, and a storage medium.

[0005] According to the first aspect of the embodiments of this specification, a method is provided. The hydrogen-electric vehicle includes a power domain, the power domain includes a power domain controller, a fuel cell system, and a battery management system, the fuel cell system includes a fuel cell controller, and the power domain controller is bidirectionally communicatively connected to the fuel cell controller, the battery management system, and the vehicle peripheral system respectively. The method is applied to the power domain controller, and the method includes:

[0006] If the fuel cell system, the battery management system, and the vehicle peripheral system pass the self-check and are in a low-voltage state, obtain the system state information obtained by detecting the devices in the fuel cell system, the battery management system, and the vehicle peripheral system respectively;

[0007] If the system state information indicates that the vehicle meets the condition for applying high voltage, send a closing instruction for closing the high-voltage relay to the battery management system;

[0008] If an electrical signal indicating that the high-voltage relay is in a closed state is received from the battery management system and the system state information indicates that the fuel cell system is allowed to start, send a working instruction to the fuel cell controller;

[0009] Obtain the operation data of the fuel cell system after responding to the working instruction;

[0010] If the operating data meets the set start completion condition, it is determined that the vehicle has completed the start of the fuel cell system.

[0011] According to a start control method for a hydrogen-electric vehicle provided by the present application, the work instructions include a purging instruction and a loading instruction;

[0012] The obtaining of the operating data after the fuel cell system responds to the work instruction, and if the operating data meets the set start completion condition, determining that the vehicle has completed the start of the fuel cell system, includes:

[0013] Send a purging instruction to the fuel cell controller;

[0014] Receive the purging status after the fuel cell system responds to the purging instruction;

[0015] If the purging status indicates that purging is completed, send a loading instruction to the fuel cell controller;

[0016] Receive the loading data after the fuel cell system responds to the loading instruction;

[0017] If the loading data reaches the expected value, it is determined that the vehicle has completed the start of the fuel cell system.

[0018] According to a start control method for a hydrogen-electric vehicle provided by the present application, before sending the purging instruction to the fuel cell controller, the method further includes:

[0019] Obtain the ambient temperature value during the start process of the fuel cell system;

[0020] If the ambient temperature value is greater than the cold start threshold, send a purging instruction to the fuel cell controller.

[0021] According to a start control method for a hydrogen-electric vehicle provided by the present application, the method further includes:

[0022] If the ambient temperature value is less than or equal to the cold start threshold, send a heating instruction for controlling the heating of the vehicle heater and an operation instruction for controlling the operation of the water pump to heat up the fuel cell system to obtain a new ambient temperature value;

[0023] If the new ambient temperature value is greater than the cold start threshold, send a stop heating instruction for controlling the vehicle heater to stop heating and a stop operation instruction for controlling the water pump to stop running;

[0024] Send a purging instruction to the fuel cell controller.

[0025] According to a starting control method of a hydrogen-electric vehicle provided by the present application, if the fuel cell system, the battery management system, and the vehicle peripheral system pass the self-check and are in a low-voltage state, obtaining system state information obtained by detecting the devices in the fuel cell system, the battery management system, and the vehicle peripheral system, including:

[0026] When the fuel cell system, the battery management system, and the vehicle peripheral system perform self-check after being awakened, perform anti-theft authentication;

[0027] Receive the self-check states of the fuel cell system, the battery management system, and the vehicle peripheral system;

[0028] If the self-check state indicates that the self-check is passed and the anti-theft authentication is passed, respectively control the fuel cell system, the battery management system, and the vehicle peripheral system to be powered on with low voltage;

[0029] After obtaining the low-voltage power supply for the fuel cell system, the battery management system, and the vehicle peripheral system, obtain the system state information obtained by detecting the devices in their respective systems.

[0030] According to a starting control method of a hydrogen-electric vehicle provided by the present application, if the self-check state indicates that the self-check is passed and the anti-theft authentication is passed, respectively controlling the fuel cell system, the battery management system, and the vehicle peripheral system to be powered on with low voltage includes:

[0031] If the self-check state indicates that the self-check is passed and the anti-theft authentication is passed, control the charging power maintenance relay in the hydrogen-electric vehicle to be attracted, so as to provide low voltage for the devices on the line where the charging power maintenance relay is located;

[0032] Send a low-voltage power-on command to the battery management system, the fuel cell system, and the vehicle peripheral system, so that the low-voltage relays in the battery management system, the fuel cell system, and the vehicle peripheral system are closed, so as to power on the devices in their respective systems with low voltage.

[0033] According to a starting control method of a hydrogen-electric vehicle provided by the present application, the conditions for allowing the fuel cell system to start include that the power battery pack in the battery management system is in a state of waiting for charging;

[0034] If an electrical signal indicating that the high-voltage relay is in a closed state is received from the battery management system and the system state information indicates that the fuel cell system is allowed to start, sending a working command to the fuel cell controller includes:

[0035] If an electrical signal indicating that the high-voltage relay feedback by the battery management system is in a closed state is received, send an allowable operation instruction to the battery management system and the vehicle peripheral system respectively for the battery management system and the vehicle peripheral system to operate;

[0036] If the system status information indicates that the power battery pack is in a state of waiting to be charged, send an operation instruction to the fuel cell controller.

[0037] According to a start control method of a hydrogen-electric vehicle provided by the present application, the system status information includes fault data of the power battery pack, state of charge, and rechargeable power;

[0038] The step of, if the system status information indicates that the power battery pack is in a state of waiting to be charged, sending an operation instruction to the fuel cell controller includes:

[0039] If it is determined according to the fault data that the power battery pack is in an allowable charging state, the state of charge is within the set charging range of the fuel cell system, and the rechargeable power is greater than or equal to the standby discharge power of the fuel cell system, send an operation instruction to the fuel cell controller.

[0040] The present application also provides a power domain controller for a hydrogen-electric vehicle, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the start control method of the hydrogen-electric vehicle as described in any one of the above is implemented.

[0041] The present application also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the start control method of the hydrogen-electric vehicle as described in any one of the above is implemented.

[0042] The starting control method, controller and storage medium of a hydrogen-electric vehicle in the embodiments of this specification are applied to a power domain controller. Without damaging the original vehicle architecture, this application integrates the hydrogen-electric system into the vehicle's power domain, establishes two-way communication connections between the power domain controller in the hydrogen-electric vehicle and the battery management system, the fuel cell system, and the vehicle peripheral system. The battery management system, the fuel cell system, and the vehicle peripheral system send their respective system status data to the power domain controller through the CAN communication bus. The power domain controller performs logical operations based on the electrical signal indicating that the high-voltage relay is in the closed state feedback by the battery management system, as well as the system status information corresponding to the status data of the fuel cell system controller and the status of each vehicle peripheral. Finally, it determines whether the fuel cell system controller needs to be started and sends the start working instruction to the fuel cell system controller through the CAN bus. As an actuator, the fuel cell system controller starts the equipment in the fuel cell system according to the designed process after receiving the working instruction from the power domain controller, realizing the start of the hydrogen-electric system, which greatly reduces the development cost of system startup and shortens the development cycle.

[0043] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this specification. Brief Description of the Drawings

[0044] The drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments consistent with this specification, and are used together with the specification to explain the principles of this specification.

[0045] Figure 1 It is the topology diagram of the hydrogen-electric system in the hydrogen-electric vehicle shown according to an embodiment of this specification;

[0046] Figure 2 It is a flowchart of the starting control method of the hydrogen-electric vehicle shown according to an embodiment of this specification;

[0047] Figure 3 It is a schematic block diagram of a computer device shown according to an embodiment of this specification. Detailed Embodiments

[0048] To make the objectives, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without making creative efforts shall fall within the scope of protection of this application.

[0049] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings as understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second" and similar words used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not denote a limitation of quantity, but mean that there is at least one. "Plurality" or "several" means two or more. Words such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0050] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a", "the" and "said" used in this application are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0051] This application provides a starting control method, a controller and a storage medium for a hydrogen-electric vehicle. The following will describe this application in detail with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0052] The hydrogen-electric vehicle described herein generally refers to a vehicle equipped with hydrogen-electric technology, in which a hydrogen fuel cell in the hydrogen-electric technology and an on-vehicle power battery pack form a multi-energy system. The vehicle includes hybrid new energy vehicles and other vehicles that use an on-vehicle power battery as the main power source or one of the power sources, and specifically may be a sedan, an SUV (sport utility vehicle), an MPV (multi-Purpose Vehicles), an off-road vehicle, a pickup truck or other non-railborne vehicles driven by power.

[0053] The battery management system and the vehicle peripheral system described in this specification have the conventional structures and functions of current vehicles on the market (such as the structure, working mode, interfaces, etc. of the power battery pack in the battery management system), and will not be specifically introduced herein.

[0054] The core of hydrogen-electric technology lies in hydrogen fuel cells. Among them, a hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of electrolyzing water. Hydrogen and oxygen are respectively supplied to the anode and the cathode. After hydrogen diffuses outward through the anode and reacts with the electrolyte, electrons are released and reach the cathode through an external load. Hydrogen fuel has become one of the main power development directions of future new energy vehicles recognized by the industry due to its advantages such as light weight, high energy density, zero emissions, pollution-free, and recyclability. However, there are not many cases of hydrogen-electric technology being installed in passenger cars, resulting in many core functions and control strategies not being mature and no platformized strategic solutions being formed. Each OEM (Original Equipment Manufacture) designs and develops independently, lacking reference and leading to repeated problems and low reuse rate, greatly wasting manpower and material resources, and failing to achieve the common growth of the industry. This includes the start-up control strategy of hydrogen-electric powered vehicles. When dealing with hydrogen-electric powered vehicles with different configurations, the start-up process control strategy of hydrogen-electric powered vehicles does not have a platformized solution, resulting in very low applicability, and thus leading to very high development costs and development cycles.

[0055] To solve the above technical problems, this specification provides a start-up control method for hydrogen-electric powered vehicles.

[0056] The power domain controller in the hydrogen-electric powered vehicle is used as the arbiter of all functions, and the fuel cell controller in the fuel cell system is used as one of the actuators. The power domain controller receives the status data signals of all in-domain system peripherals of the hydrogen-electric powered vehicle and conducts logical judgments, and sends execution instructions to each system to control the fuel cell controller to respond to the corresponding instructions, thereby realizing the start-up of the hydrogen-electric system.

[0057] The hydrogen-electric powered vehicle includes a power domain, and the power domain includes a power domain controller 100, a fuel cell system, and a battery management system. The power domain controller is the core control unit of the hydrogen-electric powered vehicle, and is bidirectionally communicatively connected to the fuel cell controller, the battery management system, and the vehicle peripheral system respectively for information interaction, and processes the received information to make reasonable instructions for realizing the start-up control method of the hydrogen-electric powered vehicle provided in this application and realizing vehicle control.

[0058] Among them, the fuel cell system includes a fuel cell controller 200, and the fuel cell controller is used to control the start-up of the fuel cell system and is communicatively connected to the power domain controller 100.

[0059] In the hydrogen-electric system, the fuel cell system further includes a fuel cell and a BOP (Balance Of Plant, auxiliary system). The BOP auxiliary system includes an air supply system, a hydrogen supply system, a water and heat management system, and an electrical system. Among them, the air supply system is used to provide the oxygen required for the reaction to the fuel cell to ensure the progress of the reaction, and it includes an air compressor 11, a back pressure valve, a humidity regulating valve 12, an air main path valve 13, an air filter, etc.; the hydrogen supply system is used to provide the required hydrogen to the fuel cell and recycle the hydrogen in the fuel cell hydrogen pipeline to improve the hydrogen utilization rate and remove the liquid water in the anode, and it includes a hydrogen circulation pump 21, a shunt throttle valve 22, etc.; the water and heat management system is used to provide a good working temperature for the fuel cell machine controller, and it includes a water pump 31, a PCT (Positive Temperature Coefficient, heater), etc.; the electrical system is used to provide the vehicle demand voltage and the electrical energy required by the components, and it includes a first converter, such as a DCF converter (DC Converter for Fuel Cell EV); a second converter, such as a DCL converter (DCL is responsible for converting the high-voltage power supply into the 12V / 24V low-voltage power supply required by the system components); a fuel cell inspection module 41, etc.

[0060] As Figure 1 shown, Figure 1 it is the topology diagram of the hydrogen-electric system loading scheme of this application.

[0061] The fuel cell controller is connected to the fuel cell inspection module 41 through the first CAN bus (CAN0 shown in the figure). The fuel cell inspection module 41 is used to collect the fuel cell single cell voltage (or the total voltage of the fuel cell stack) signal and send it to the fuel cell system controller. By checking the single cell voltage signal, the working state of the fuel cell is judged and corresponding control operations are performed.

[0062] The fuel cell controller is connected to the power domain controller through the second CAN bus (CAN1 shown in the figure) and PCAN, and is used to interact with the power domain controller, receive the electrical signal of the power domain controller, or send the electrical signal of the fuel cell system to the power domain controller.

[0063] The fuel cell controller is connected to the components in the BOP auxiliary system and the HMS (Hydrogen Management System, hydrogen system controller) through the third CAN bus (CAN2 shown in the figure), and is used to control the startup of the fuel cell system and the startup status feedback.

[0064] The fuel cell controller obtains the flashing file of the fuel cell controller through the fourth CAN bus (CAN3 shown in the figure) for flashing the software required for the whole vehicle to control the normal operation of the whole vehicle.

[0065] In this embodiment, in the above hydrogen-electric system installation scheme, the power domain controller acts as the arbiter of all functions, and the fuel cell controller in the fuel cell system is regarded as one of the actuators. The fuel cell controller collects the status of each component in the fuel cell system and sends it to the power domain controller through the CAN bus. After receiving the status data signals of all system peripherals in the domain, the power domain controller performs logical operations and judgments, arbitrates the actions to be executed by each system component, and sends them to each system controller through the CAN bus. After receiving the instructions from the power domain controller, each system controller executes the corresponding actions according to the instructions. Thus, the platform-based control strategy reduces the development difficulty of adjustment and expansion, greatly reduces the development cost and shortens the development cycle.

[0066] As an example, the hydrogen-electric system installation scheme of the domain controller can be used in the mass production stage.

[0067] Based on the hydrogen-electric powered vehicle corresponding to the above installation method, this specification provides a starting control method for a hydrogen-electric powered vehicle.

[0068] As Figure 2 shown, Figure 2 is a flowchart of a method shown in this specification according to an exemplary embodiment, including the following steps:

[0069] In step 101, if the fuel cell system, the battery management system, and the vehicle peripheral system pass the self-check and are in a low-voltage state, obtain the system status information obtained by detecting the devices in the fuel cell system, the battery management system, and the vehicle peripheral system respectively;

[0070] In step 102, if the system status information indicates that the whole vehicle meets the condition for applying high voltage, send a closing instruction for closing the high-voltage relay to the battery management system;

[0071] In step 103, if an electrical signal indicating that the high-voltage relay is in the closed state is received from the battery management system and the system status information indicates that the fuel cell system is allowed to start, send a working instruction to the fuel cell controller;

[0072] In step 104, obtain the operation data of the fuel cell system after responding to the working instruction;

[0073] In step 105, if the operation data meets the set start completion condition, determine that the whole vehicle has completed the start of the fuel cell system.

[0074] As an example, the hydrogen electric vehicle includes a power domain, which includes a power domain controller, a fuel cell system, a battery management system, and a vehicle peripheral system. The fuel cell system includes a fuel cell controller. The power domain controller is bidirectionally communicatively connected to the fuel cell controller, the battery management system, and the vehicle peripheral system respectively. The start control method of the hydrogen electric vehicle is applied to the power domain controller.

[0075] The above-mentioned vehicle peripheral system refers to the collective term for other peripherals of the vehicle except for the fuel cell system, the power domain controller, and the battery management system. These peripherals are related to the vehicle's power-on function, such as the anti-theft controller, the TBOX remote controller (Telematics Box, remote communication system controller), etc. These peripherals provide the conditions for whether the vehicle can be powered on at high voltage.

[0076] The start-up process of the hydrogen electric system mainly includes two parts: powering on the vehicle at high voltage and starting the fuel cell system. After both parts are in a ready state for power release at any time, it is determined that the hydrogen electric system has started successfully.

[0077] In step 101, the operating state of the vehicle is detected before powering on the vehicle at high voltage to perform accurate work before powering on at high voltage.

[0078] As an example, in step 1011, after the vehicle is powered on with low voltage, the fuel cell controller, the power domain controller, the battery management system, and the vehicle peripheral system are awakened. After being awakened, the fuel cell controller, the power domain controller, the battery management system, and the vehicle peripheral system respectively enter a self-check state to detect whether there are any faults in themselves. The fuel cell controller, the battery management system, and the vehicle peripheral system send the data of the self-check state to the power domain controller through the CAN bus and execute step 1012. At the same time, the vehicle control performs anti-theft authentication.

[0079] When the key is pressed to unlock, the door is opened, or the start button is pressed in this article, the wake-up signal is forwarded to the vehicle controller through the gateway and the vehicle controller is awakened. After the vehicle controller is awakened, it controls the low-voltage relay box to supply low voltage to other ECUs (Electronic Control Unit), and wakes up the corresponding ECUs through sending network management, including the power domain controller, the fuel cell controller, the battery management system, and the vehicle peripheral system.

[0080] Step 1012: After the power domain controller receives the data of the corresponding self-check status, it determines whether the startup requirements are met according to the data of the self-check status of each peripheral device. For example, it checks whether the voltage status of each peripheral device (including low-voltage motors, relays controlling the power battery pack, etc.) can meet the requirements of the device operating status. If the power domain controller passes the anti-theft authentication and the self-check status of itself and each peripheral device indicates a successful self-check, the power domain controller controls the fuel cell controller, the battery management system, and the low-voltage power supply of the vehicle peripheral system respectively, and continues to execute Step 1013.

[0081] During the process of applying low-voltage power, the power domain controller closes the CPSR (Charge Power Sustain Relay), and the CPSR provides low-voltage power for the peripherals on the CPSR line, including the high-voltage relay of the battery management system, the fuel cell controller, the motor controller, the battery controller, and the pre-charge relay.

[0082] When the power domain controller closes the CPSR, it sends a low-voltage power-on command allowing the application of low-voltage power to each peripheral device such as the fuel cell controller, the battery management system, and the vehicle peripheral system, so as to control the battery management system, the fuel cell system, and the vehicle peripheral system to output low-voltage power to the devices within their respective systems after receiving the low-voltage power-on command.

[0083] If any one of the anti-theft authentication of the power domain controller and the self-check of each peripheral device fails, the startup process of the fuel cell system is terminated.

[0084] In some embodiments, after the power domain controller, the fuel cell controller, the battery management system, and the vehicle peripheral system pass the self-check, they read the historical fault information stored in their respective internal memories and analyze whether there are high-level faults in the historical fault information. If no high-level faults are found, it indicates that the systems of the vehicle are in a normal state waiting to start, including the fuel cell system, and Step 1013 is continued. If high-level faults are found, the fuel cell system is controlled to cut off the low-voltage power supply and startup is prohibited; or the startup process is terminated.

[0085] The high-level faults described herein refer to faults that have a very adverse impact on the operation after the vehicle starts (such as difficult shutdown, power-off, etc.). For example, vehicle system short circuit, motor failure, thermal runaway of the power battery pack, etc. High-level faults can be set before the hydrogen-electric system starts. When analyzing the historical fault information, it is compared with a pre-set high-level fault library to determine whether there are high-level faults in the historical fault information.

[0086] The historical fault information described herein refers to the fault information recorded after the vehicle is powered on and the systems in the vehicle are detected.

[0087] In some embodiments, historical fault information obtained from multiple detections of systems in the vehicle is stored in the memories of the power domain controller, the fuel cell controller, the battery management system, and the vehicle peripheral system respectively. After the power domain controller, the fuel cell controller, the battery management system, and the vehicle peripheral system pass the self-check, the latest historical fault information is obtained from the memory to reflect the most accurate state information of the vehicle.

[0088] In other embodiments, the fuel cell system, the battery management system, and the vehicle peripheral system further include low-voltage relays respectively. The low-voltage relays are connected between other peripherals in their respective systems and the low-voltage battery. After each system receives the low-voltage signal of the upper low-voltage power command, the contacts of the low-voltage relays close, allowing the electrical equipment on the current path to operate.

[0089] The low-voltage signals described herein are, for example, signals of 12V and 24V.

[0090] Step 1013: The power domain controller receives the system status information. The system status information refers to that after the battery management system, the fuel cell system, and the vehicle peripheral system are powered on with low voltage, they will respectively detect the working status of the peripherals inside and outside their systems to obtain the system status information, and send the system status information to the power domain controller through the CAN bus, and then execute step 102.

[0091] In some embodiments, the battery management system, the fuel cell system, and the vehicle peripheral system respectively detect the working status of the peripherals inside and outside their systems, and determine whether their own systems have the ability to work normally, and send the system status information to the power domain controller.

[0092] The detection described herein refers to the self-check of the peripherals inside and outside the battery management system, the fuel cell system, and the vehicle peripheral system. For example, if there is a high-level fault that causes the fuel cell system not to operate, the system status information indicating that the equipment inside the fuel cell system does not have the ability to work normally is obtained, and then the fuel cell system is controlled to cut off the low voltage and prohibit starting, or end the starting process. If there is no high-level fault that causes the fuel cell system not to operate, the system status information indicating that the equipment inside the fuel cell system is in a state of having the ability to work normally is obtained, and step 102 is continued to be executed.

[0093] The high-level faults described herein refer to faults that have a very bad impact on the operation of the vehicle (such as difficult to stop, cut off power, etc.) on the operation status of the internal and external equipment of the battery management system, the fuel cell system, and the vehicle peripheral system after they are powered on with low voltage. For example, the vehicle system is short-circuited, the motor fails, the power battery pack is thermally out of control, the hydrogen storage tank or the hydrogen pipeline leaks hydrogen, etc.

[0094] In some embodiments, if there are high-level faults that cause the battery management system, fuel cell system, and vehicle peripheral systems to malfunction, the faults of each device are recorded in the historical fault information stored in the battery management system, fuel cell system, and vehicle peripheral systems respectively, providing basic judgment information for the next power-on of the hydrogen-electric system.

[0095] In step 102, the power domain controller combines the system status information of each system within the domain and the working status information of other domains in the hydrogen-electric vehicle to determine whether the vehicle meets the condition for applying high voltage. If the system status information indicates that the vehicle meets the condition for applying high voltage, that is, the vehicle can apply high voltage, then high-voltage control is performed.

[0096] In some embodiments, a high-voltage relay is included in the peripherals of the battery management system of the hydrogen-electric vehicle. The high-voltage relay is connected to the power battery pack in the vehicle. Only when the high-voltage relay is closed can the power battery pack output power to the vehicle.

[0097] The control of the high-voltage relay is to output a high-level signal or a low-level signal low side from the battery management system to the coil of the relay, thereby controlling the disconnection and closing of the high-voltage relay. Therefore, if the system status information indicates that the vehicle meets the condition for applying high voltage, the power domain controller sends a closing command for the high-voltage relay in the battery management system to the battery management system. After the high-voltage relay receives the closing command, the battery management system performs the operation of closing the high-voltage relay to complete the application of high voltage to the vehicle. And the real-time status of the high-voltage relay is sent to the power domain controller.

[0098] When the real-time status of the high-voltage relay indicates that the high-voltage relay is in an unclosed state, control the fuel cell system to cut off low voltage to prohibit starting, or end the starting process, or do not send an instruction to start the fuel cell system.

[0099] When the real-time status of the high-voltage relay indicates that the high-voltage relay is in a closed state, continue to execute step 103.

[0100] In step 103, the power domain controller receives the electrical signal of the real-time status of the high-voltage relay fed back by the battery management system, and at the same time determines whether the system status of the battery management system, fuel cell system, and vehicle peripheral systems respectively allows the fuel cell system to start according to the system status information. At the same time, the power domain controller sends an allow-work instruction to the battery management system and the vehicle peripheral system respectively to control the battery management system and the vehicle peripheral system to start normal operation after receiving the allow-work instruction.

[0101] It should be noted that the operation of the power domain controller to obtain the real-time state of the feedback high-voltage relay and determine whether to allow the fuel cell system to start can be executed in sequence according to the actual operation, or can be executed simultaneously. The purpose is to determine whether the vehicle is on high voltage and whether the fuel cell system is in a ready state for power release at any time, and is used to control the start of the hydrogen-electric system.

[0102] As an example, if an electrical signal indicating that the high-voltage relay is in a closed state is received from the battery management system and the system status information indicates that the fuel cell system is allowed to start, a start command is sent to the fuel cell controller to control the start of the fuel cell system. Then continue to execute step 1031.

[0103] If the power domain controller determines that the vehicle does not meet any of the requirements that the high-voltage relay is in a closed state and the system status information indicates that the fuel cell system is allowed to start, no start command for the fuel cell system is sent or the start process is ended.

[0104] The system status information in this article is also used to determine whether each system status allows the fuel cell system to start. After both the vehicle's high-voltage and the fuel cell system start are in a ready state for power release at any time, it is considered that the hydrogen-electric system starts successfully.

[0105] In some embodiments, the power domain peripherals of the hydrogen-electric vehicle further include a power battery pack. The power battery pack belongs to a high-voltage component and is connected to the high-voltage relay. Only when the high-voltage relay is closed can the power battery pack output power to the vehicle. Therefore, allowing the fuel cell system to start includes that the power battery pack in the battery management system is in a state of waiting to be charged, that is, the power battery pack has a charging demand.

[0106] That is, if an electrical signal indicating that the high-voltage relay is in a closed state is received from the battery management system and it is determined that the power battery pack is in a state of waiting to be charged, a start command is sent to the fuel cell controller to control the start of the fuel cell system.

[0107] As an example, the system status information for determining that the power battery pack is in a state of waiting to be charged includes the working state data of the power battery pack, the state of charge of the battery, and the rechargeable power. The power domain controller obtains the system status information of the power battery pack sent by the battery management system through the CAN bus, and obtains the system status information of the maximum and minimum power that the fuel cell system of the fuel cell system can provide and the standby discharge power sent by the fuel cell system through the CAN bus.

[0108] As an example, after the power domain controller receives the system status information of each system, it determines whether the power battery pack is in a state of waiting to be charged. The specific process is as follows:

[0109] Step 1031, the power domain controller obtains the working state data of the power battery pack, analyzes the working state data, and determines whether the power battery pack is in a state allowing charging, that is, whether the power battery pack has a fault state and the impact of this fault on the operation of the hydrogen-electric system. If the power battery pack has no fault state, or if the power battery pack has a fault state but this fault does not affect the operation of the hydrogen-electric system, it means that the power battery pack can be charged, and step 1032 is executed.

[0110] If the power battery pack has a fault state and this fault causes the hydrogen-electric system to be unable to operate, then do not send a start command for the fuel cell system or end the start process.

[0111] In this article, the power battery pack has a fault state and this fault causes the hydrogen-electric system to be unable to operate. The corresponding working state data, for example, the fault of the power battery pack prohibiting charging, the fault of the power battery pack insulation, etc.

[0112] Step 1032, the power domain controller obtains the battery SOC (State of Charge) of the power battery pack, analyzes the battery SOC based on the charging range of the fuel cell system, and determines whether the power battery pack has a charging requirement.

[0113] Specifically, obtain the set charging range of the hydrogen-electric system, that is, obtain the charging range of the fuel cell system. If the battery SOC is within the charging range of the fuel cell system, it means that the power battery pack has a charging requirement, and step 1033 is executed. If the battery SOC is not within the charging range of the fuel cell system, it means that the current battery SOC of the power battery pack is sufficient and there is no need for the fuel cell system to work to charge it, then do not send a start command for the fuel cell system or end the start process.

[0114] As an example, if the battery SOC of the power battery pack is in the range of 45%-55%, and the charging range of the fuel cell system is that the battery SOC is less than 30%, then do not send a start command for the fuel cell system or end the start process.

[0115] Step 1033, the power domain controller obtains the power allowed to charge the power battery pack, that is, the chargeable power. The chargeable power is related to the battery SOC. Based on the standby discharge power of the fuel cell system, analyze the power battery pack to determine whether the power battery pack has a charging requirement.

[0116] In a fuel cell system, under normal circumstances, air and hydrogen are still supplied to the fuel cell stack in the fuel cell system during the standby state (such as when parking at a traffic light) to maintain the state where the fuel cell stack generates output power. This power is usually used to charge the power battery pack until the state of charge (SOC) of the battery in the power battery pack reaches the SOC upper limit, indicating that the power battery pack is fully charged. That is, the fuel cell system has a standby discharge power during the standby state, and this standby discharge power is not zero.

[0117] The power domain controller obtains the set standby discharge power. If the rechargeable power of the power battery pack is greater than or equal to the standby discharge power, it indicates that the power battery pack has a charging demand, and step 104 is executed. If the rechargeable power of the power battery pack is less than the standby discharge power, it means that the standby discharge power of the fuel cell system can meet the charging of the power battery pack, and the power battery pack has no additional charging demand, then the start instruction of the fuel cell system is not sent or the start process is ended.

[0118] Through the above steps, the power domain controller determines whether the power battery pack is in a state to be charged according to the system state information of each system. If so and the high-voltage relay is in the closed state, a start instruction is sent to the fuel cell controller to control the start of the fuel cell system. When the fuel cell system starts successfully and the high voltage is applied to the entire vehicle, it indicates that the hydrogen-electric system starts, and the start control process of this hydrogen-electric vehicle ends.

[0119] As an example, the process of starting the fuel cell system is as follows in steps 1041 to 105:

[0120] Step 1041, the power domain controller obtains the ambient temperature value of the fuel cell system. The ambient temperature value is obtained by the fuel cell controller after receiving the start instruction sent by the power domain controller, and the ambient temperature value is sent to the power domain controller.

[0121] The operating temperature of the fuel cell in the fuel cell system is one of the important parameters for its normal operation because temperature changes will directly affect the performance and lifespan of the fuel cell. Usually, the operating temperature of the fuel cell is generally between 60°C and 80°C. Within this temperature range, the reaction rate of the fuel cell is the fastest, and it can generate the maximum power output to meet the vehicle's requirements. Therefore, in order to ensure the normal operation of the fuel cell, temperature control is required.

[0122] Step 1042, after the power domain controller receives the ambient temperature value obtained by the fuel cell controller, it compares the ambient temperature value with the cold start threshold.

[0123] If the ambient temperature value is greater than the cold start threshold, control the fuel cell system to perform purging and loading to complete the start of the fuel cell system.

[0124] The cold start threshold in this text refers to the expected operating temperature of the fuel cell. If the ambient temperature value is greater than the cold start threshold, the fuel cell system is controlled to enter the normal start mode and step 1043 is executed.

[0125] If the ambient temperature value is less than or equal to the cold start threshold, the fuel cell system is controlled to enter the cold start mode. The cold start means that the hydrogen-powered vehicle can successfully start at a temperature below the cold start threshold and can quickly raise the internal temperature of the fuel cell to the operating temperature that satisfies the normal operation of the system. Exemplarily, the cold start threshold is -10 °C.

[0126] During the cold start of the fuel cell, the water generated by the reaction will freeze inside the fuel cell, causing the fuel cell to fail to start normally or its performance to decline; after cold start, the fuel starts to work at a low temperature, and the generated heat will melt the ice inside the system. If the generated heat is insufficient, the water generated by the reaction will also quickly freeze. That is, during the cold start process, due to the too low temperature, the reaction rate of the fuel cell will slow down, thereby affecting the output power and efficiency of the fuel cell system, resulting in a very low output power of the fuel cell system and being unable to meet the vehicle's requirements. Therefore, in order to ensure a successful cold start, it is necessary to heat the fuel cell system. After the newly obtained ambient temperature value of the fuel cell system reaches the operating temperature, that is, when the new ambient temperature value is greater than the cold start threshold, step 1043 is executed.

[0127] In some embodiments, in order to ensure the normal operation of the fuel cell system, it is necessary to control its temperature. Generally speaking, the temperature control of the fuel cell system can be achieved in two ways. On the one hand, the temperature of the fuel cell system is controlled by external heating or cooling methods, such as electric heating and catalytic combustion heating; on the other hand, the temperature of the fuel cell system is controlled by an internal temperature control system. For example, the thermal management system in the fuel cell system includes a PTC (Positive Temperature Coefficient, heater) and a water pump. A branch water circuit is designed in the coolant outlet pipeline of the fuel cell stack to connect the PTC heater and the water pump. During the cold start process, the power domain controller sends a heating instruction for controlling the vehicle heater to heat and an operation instruction for controlling the operation of the water pump to the fuel cell controller, controls the PTC heater to heat the coolant, and the coolant enters the stack through the water pump to realize heating of the fuel cell system so that the fuel cell system warms up and a new ambient temperature value is obtained.

[0128] If the new ambient temperature value is greater than the cold start threshold, the power domain controller sends a stop heating instruction for controlling the vehicle heater to stop heating and a stop operation instruction for controlling the water pump to stop operating to the fuel cell controller.

[0129] In some other embodiments, in addition to temperature control, the operating temperature of the fuel cell system is also affected by other factors, such as the flow rate and pressure of hydrogen and oxygen. By controlling the air compressor in the fuel cell system, the pressure of the air delivered to the fuel cell stack is controlled.

[0130] Continue to execute step 1043. If an electrical signal indicating that the high-voltage relay is in the closed state is received from the battery management system and the system status information indicates that the fuel cell system is allowed to start, the power domain controller sends a working instruction to the fuel cell controller to control the fuel cell system to perform purging and loading, and complete the start-up of the fuel cell system.

[0131] The working instructions herein include a purging instruction and a loading instruction.

[0132] The purging herein refers to performing hydrogen purging during the oxidation-reduction reaction process of the fuel cell in the fuel cell system, that is, using the anode hydrogen to timely discharge the water and nitrogen on the anode side, and at the same time recycling the remaining unreacted hydrogen through the hydrogen circulation pump.

[0133] The loading herein refers to the process in which hydrogen and oxygen react in the fuel cell system to increase the output power.

[0134] In some embodiments, the power domain controller sends a purging instruction to the fuel cell controller. The fuel cell controller receives the purging instruction, controls the opening of the devices related to purging in the fuel cell system, and performs purging. And the purging status of the fuel cell system after responding to the purging instruction is sent to the power domain controller in real time, and step 104 is executed.

[0135] As an example, the fuel cell controller turns on peripherals such as an ejector, a hydrogen circulation pump, hydrogen and air throttle valves, and an air compressor for purging, and monitors the purging status in real time, such as the hydrogen concentration.

[0136] The power domain controller receives the purging status of the fuel cell system after responding to the purging instruction. If the purging status indicates that the purging is completed, the hydrogen and air throttle valves are closed to stop purging, otherwise purging continues.

[0137] Thereafter, a loading instruction is sent to the fuel cell controller. After the fuel cell controller receives the loading instruction, it controls the opening of the devices related to loading in the fuel cell system and performs loading. And the loading data of the fuel cell system after responding to the loading instruction is sent to the power domain controller in real time, and step 104 is executed.

[0138] As an example, the fuel cell controller turns on the DCF converter and performs loading.

[0139] In step 104, the power domain controller receives the operation data sent by the fuel cell controller. The operation data includes the purge state of the fuel cell system after responding to the purge instruction and the loading data of the fuel cell system after responding to the loading instruction, and then continues to execute step 105.

[0140] In step 105, it is determined whether the operation data meets the set startup completion condition to determine whether the vehicle has completed the startup of the fuel cell system.

[0141] In some embodiments, the power domain control receives the loading data of the fuel cell system after responding to the loading instruction. If the loading data reaches the expected value, it is determined that the startup of the fuel cell system is successful, and at the same time, it is determined that the startup of the hydrogen-electric system of the vehicle is completed; otherwise, it is determined that the startup of the hydrogen-electric system is not completed.

[0142] The present application provides a startup control method, a controller and a storage medium for a hydrogen-electric vehicle, which are applied to a power domain controller. The present application integrates the hydrogen-electric system into the power domain of the vehicle without damaging the original architecture of the vehicle, establishes a two-way communication connection between the power domain controller in the hydrogen-electric vehicle and the battery management system, the fuel cell system, and the vehicle peripheral system. The battery management system, the fuel cell system, and the vehicle peripheral system send their respective system status data to the power domain controller through the CAN communication bus. The power domain controller performs logical operations based on the electrical signal that the high-voltage relay in the battery management system feedbacks is in the closed state, and the system status information corresponding to the status data of the fuel cell system controller and the status data of each vehicle peripheral. Finally, it determines whether the fuel cell system controller needs to be started, and sends the startup work instruction to the fuel cell system controller through the CAN bus. The fuel cell system controller, as an actuator, starts the equipment in the fuel cell system according to the design process after receiving the work instruction of the power domain controller, realizing the startup of the hydrogen-electric system, which greatly reduces the development cost of system startup and shortens the development cycle.

[0143] Based on the same application concept as the above method, corresponding to the embodiments of the foregoing method, this specification also provides an embodiment of a computer device.

[0144] As Figure 3As shown, it is a schematic block diagram of a computer device in this specification, which is used to implement the start control method of the above hydrogen-electric powered vehicle. In some embodiments, the computer device may include a processor 510, a network interface 520, a memory 530, and a non-volatile memory 540. A start control program of the hydrogen-electric powered vehicle that can run on the processor 510 is stored on the non-volatile memory 540. When the start control program of the hydrogen-electric powered vehicle is executed by the processor 510, it can be used to implement the start control method of the hydrogen-electric powered vehicle in the above various embodiments. In some embodiments, the computer device may also include other hardware according to the actual functions of the computer device, which will not be elaborated here.

[0145] The above describes specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be executed in a different order than in the embodiments and still achieve the desired results. Additionally, the processes depicted in the drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0146] Those skilled in the art will readily conceive of other embodiments of this specification after considering the specification and practicing the invention claimed herein. This specification is intended to cover any variations, uses, or adaptations of this specification, which follow the general principles of this specification and include known common knowledge or conventional technical means in the technical field not claimed in this application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of this specification are pointed out by the following claims.

[0147] It should be understood that this specification is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of this specification is only limited by the appended claims.

[0148] The above are only the preferred embodiments of this specification and are not intended to limit this specification. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this specification shall be included within the scope protected by this specification.

Claims

1. A starting control method for a hydrogen-electric vehicle, characterized in that, The hydrogen - electric vehicle includes a power domain, the power domain includes a power domain controller, a fuel cell system, and a battery management system. The fuel cell system includes a fuel cell controller. The power domain controller is bidirectionally communicatively connected to the fuel cell controller, the battery management system, and the vehicle peripheral system respectively. The method is applied to the power domain controller and includes: If the fuel cell system, the battery management system, and the vehicle peripheral system pass the self - inspection and are in a low - voltage state, obtain the system status information obtained by detecting the devices in the fuel cell system, the battery management system, and the vehicle peripheral system respectively; If the system status information indicates that the vehicle meets the condition for applying high voltage, send a closing instruction for closing the high - voltage relay to the battery management system; If an electrical signal indicating that the high - voltage relay is in a closed state is received from the battery management system and the system status information indicates that the fuel cell system is allowed to start, send a working instruction to the fuel cell controller; Obtain the operation data of the fuel cell system after responding to the working instruction; If the operation data meets the set start - completion condition, determine that the vehicle has completed the start - up of the fuel cell system.

2. The starting control method of the hydrogen-electric vehicle according to claim 1, characterized in that, The working instruction includes a purging instruction and a loading instruction; The obtaining the operation data of the fuel cell system after responding to the working instruction, and if the operation data meets the set start - completion condition, determining that the vehicle has completed the start - up of the fuel cell system, includes: Send a purging instruction to the fuel cell controller; Receive the purging status of the fuel cell system after responding to the purging instruction; If the purging status indicates that the purging is completed, send a loading instruction to the fuel cell controller; Receive the loading data of the fuel cell system after responding to the loading instruction; If the loading data reaches the expected value, determine that the vehicle has completed the start - up of the fuel cell system.

3. The starting control method of the hydrogen-electric vehicle according to claim 2, characterized in that Before sending the purging instruction to the fuel cell controller, the method further includes: Obtain the ambient temperature value during the start - up process of the fuel cell system; If the ambient temperature value is greater than the cold - start threshold, send a purging instruction to the fuel cell controller.

4. The starting control method of the hydrogen-electric vehicle according to claim 3, characterized in that, The method further includes: If the ambient temperature value is less than or equal to the cold - start threshold, send a heating instruction for controlling the vehicle heater to heat and an operation instruction for controlling the water pump to run, so as to raise the temperature of the fuel cell system to obtain a new ambient temperature value; If the new ambient temperature value is greater than the cold - start threshold, send a stop - heating instruction for controlling the vehicle heater to stop heating and a stop - running instruction for controlling the water pump to stop running; Send a purging instruction to the fuel cell controller.

5. The start - up control method of the hydrogen - electric vehicle according to claim 1, wherein The if the fuel cell system, the battery management system, and the vehicle peripheral system pass the self - inspection and are in a low - voltage state, obtaining the system status information obtained by detecting the devices in the fuel cell system, the battery management system, and the vehicle peripheral system respectively, includes: When the fuel cell system, the battery management system, and the vehicle peripheral system are awakened for self-check, anti-theft authentication is performed; Receive the self-check status of the fuel cell system, the battery management system, and the vehicle peripheral system; If the self-check status indicates that the self-check is passed and the anti-theft authentication is passed, control the low-voltage power supply on the fuel cell system, the battery management system, and the vehicle peripheral system respectively; After obtaining the low-voltage power supply on the fuel cell system, the battery management system, and the vehicle peripheral system, obtain the system status information obtained by detecting the devices in their respective systems.

6. The starting control method of the hydrogen-electric powered vehicle according to claim 5, characterized in that, The step of if the self-check status indicates that the self-check is passed and the anti-theft authentication is passed, controlling the low-voltage power supply on the fuel cell system, the battery management system, and the vehicle peripheral system respectively includes: If the self-check status indicates that the self-check is passed and the anti-theft authentication is passed, control the charging power maintenance relay in the hydrogen-electric vehicle to be energized to provide low-voltage power for the devices on the line where the charging power maintenance relay is located; Send a low-voltage power supply command to the battery management system, the fuel cell system, and the vehicle peripheral system, so that the low-voltage relays in the battery management system, the fuel cell system, and the vehicle peripheral system are closed to supply low-voltage power to the devices in their respective systems.

7. The starting control method of the hydrogen electric vehicle according to claim 1, characterized in that, The conditions for allowing the fuel cell system to start include that the power battery pack in the battery management system is in a state of waiting to be charged; The step of if receiving the electrical signal that the high-voltage relay is in the closed state feedback by the battery management system and the system status information indicates that the fuel cell system is allowed to start, sending a working command to the fuel cell controller includes: If receiving the electrical signal that the high-voltage relay is in the closed state feedback by the battery management system, send an allow working command to the battery management system and the vehicle peripheral system respectively for the battery management system and the vehicle peripheral system to work; If the system status information indicates that the power battery pack is in a state of waiting to be charged, send a working command to the fuel cell controller.

8. The starting control method for a hydrogen-electric powered vehicle according to claim 7, characterized in that, The system status information includes the fault data of the power battery pack, the state of charge of the battery, and the rechargeable power; The step of if the system status information indicates that the power battery pack is in a state of waiting to be charged, sending a working command to the fuel cell controller includes: If it is determined according to the fault data that the power battery pack is in a state of allowing charging, the state of charge of the battery is within the set charging range of the fuel cell system, and the rechargeable power is greater than or equal to the standby discharge power of the fuel cell system, send a working command to the fuel cell controller.

9. A power domain controller for a hydrogen-electric vehicle, characterized in that, The power domain controller includes a memory, a processor, and a start control program of the hydrogen-electric vehicle stored on the memory and executable on the processor. When the processor executes the start control program of the hydrogen-electric vehicle, the steps of the start control method of the hydrogen-electric vehicle according to any one of claims 1-8 are implemented.

10. A computer-readable storage medium, characterized in that, A startup control program for a hydrogen-electric vehicle is stored on the computer-readable storage medium. When the startup control program for the hydrogen-electric vehicle is executed, the steps of the startup control method for the hydrogen-electric vehicle according to any one of claims 1-8 are implemented.

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