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 vehicle control unit so as to separately integrate a hydrogen-electric system into a power domain of the vehicle and establish two-way communication connection between the vehicle control unit in the hydrogen-electric power automobile and a battery management system, a fuel cell system and a vehicle peripheral system. The whole vehicle controller carries out self-logic operation according to an electric signal, fed back by the battery management system, that the high-voltage relay is in a closed state, and system state information corresponding to the state data of the fuel cell controller and the state data of each peripheral of the whole vehicle, and finally judges whether the fuel cell controller needs to be started or not. The starting instruction is sent to the fuel cell controller through the communication bus, the fuel cell controller serves as an actuator, after the starting instruction of the whole vehicle controller is received, equipment in the gas-electricity system is started according to the design process, 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] This application relates to the field of automotive control technology, 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 for 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 equipped on passenger cars, resulting in many core functions and control strategies being immature, and no platform-based strategic solutions have been formed. Each original equipment manufacturer designs and develops independently, leading to repeated problems and low reuse rate, wasting a large amount of manpower and material resources, including the starting control strategy of hydrogen-electric vehicles.

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

[0004] To overcome the problems in the related art, this specification provides a method, a device, 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 multiple systems, and the multiple systems include a battery management system, a vehicle controller, a fuel cell system, and a vehicle peripheral system. The fuel cell system includes a fuel cell controller. The vehicle controller is bidirectionally communicatively connected to the fuel cell controller, the battery management system, and the vehicle peripheral system. The method is applied to the vehicle controller, and the method includes:

[0006] If the multiple systems pass the self-check and are in a low-voltage state, obtain the system status information obtained by detecting the devices in the multiple systems;

[0007] If the system status information indicates that the vehicle meets the condition for applying high voltage, send a closing command for closing the high-voltage relay of the battery management system 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 status information indicates that the fuel cell system is allowed to start, send a start command to the fuel cell controller to control the start of the fuel cell system.

[0009] According to a starting control method for a hydrogen-electric vehicle provided by the present application, if the multiple systems pass the self-check and are in a low-voltage state, obtaining system status information obtained by detecting the devices in the multiple systems, including:

[0010] When the multiple systems are self-checked after being awakened, perform anti-theft authentication;

[0011] Receive the self-check status of the multiple systems;

[0012] If the self-check status indicates that the self-check passes and the anti-theft authentication passes, respectively control the multiple systems to apply low voltage;

[0013] After obtaining the low voltage applied to the multiple systems, obtain the system status information obtained by detecting the devices in their respective systems.

[0014] According to a starting control method for a hydrogen-electric vehicle provided by the present application, if the self-check status indicates that the self-check passes and the vehicle control unit passes the anti-theft authentication, respectively controlling the multiple systems to apply low voltage, including:

[0015] If the self-check status indicates that the self-check passes and the anti-theft authentication passes, control the charging power maintenance relay in the hydrogen-electric vehicle to be energized, and provide low voltage to the devices on the line where the charging power maintenance relay is located;

[0016] Send a low-voltage application command to the battery management system, the fuel cell system, and the vehicle peripheral system, so as to control the low-voltage relays in the battery management system, the fuel cell system, and the vehicle peripheral system to close, and apply low voltage to the devices in their respective systems.

[0017] According to a starting control method for a hydrogen-electric vehicle provided by the present application, 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;

[0018] 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 start command to the fuel cell controller to control the fuel cell system to start, including:

[0019] If an electrical signal indicating that the high-voltage relay is in a closed state is received from the battery management system, respectively send an allow-work command to the battery management system and the vehicle peripheral system to control the battery management system and the vehicle peripheral system to work;

[0020] If the system status information indicates that the power battery pack is in a state to be charged, send a start command to the fuel cell controller to control the start of the fuel cell system.

[0021] 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.

[0022] The step of, if the system status information indicates that the power battery pack is in a state to be charged, sending a start command to the fuel cell controller to control the start of the fuel cell system includes:

[0023] If it is determined according to the fault data that the power battery pack is in a state allowing charging, 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 a start command to the fuel cell controller to control the start of the fuel cell system.

[0024] According to a start control method of a hydrogen-electric vehicle provided by the present application, the step of sending a start command to the fuel cell controller to control the start of the fuel cell system includes:

[0025] Send a start command to the fuel cell controller to control the start of the fuel cell system, so that after receiving the start command, the fuel cell controller controls the fuel cell system to perform purging, loading, and sends the start state of the fuel cell system to the vehicle controller.

[0026] If it is received that the start state indicates that the fuel cell system is in a start-completed state, determine that the start of the fuel cell system is completed.

[0027] According to a start control method of a hydrogen-electric vehicle provided by the present application, the method further includes:

[0028] Send a start command to the fuel cell controller to control the start of the fuel cell system, so that after receiving the start command, the fuel cell controller obtains the ambient temperature value of the fuel cell system, and if the ambient temperature value is greater than the cold start threshold, controls the fuel cell system to perform purging, loading, and sends the start state of the fuel cell system to the vehicle controller.

[0029] According to a start control method of a hydrogen-electric vehicle provided by the present application, the method further includes:

[0030] Send a start command to the fuel cell controller to control the start of the fuel cell system. After the fuel cell control receives the start command, obtain the ambient temperature value of the fuel cell system. If the ambient temperature value is less than or equal to the cold start threshold, control the fuel cell system to heat up to obtain a new ambient temperature value. And if the new ambient temperature value is greater than the cold start threshold, control the fuel cell system to purge and load, and send the start status of the fuel cell system to the vehicle controller.

[0031] The present application also provides a vehicle 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, it implements the start control method for the hydrogen-electric vehicle as described in any one of the above.

[0032] 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, it implements the start control method for the hydrogen-electric vehicle as described in any one of the above.

[0033] In the embodiment of this specification, the start control method, controller, and storage medium of the hydrogen-electric vehicle are applied to the vehicle controller. Without destroying the original architecture of the vehicle, the hydrogen-electric system is integrated into the power domain of the vehicle in a discrete manner, and a two-way communication connection is established between the vehicle controller and the battery management system, fuel cell system, and vehicle peripheral system in the hydrogen-electric vehicle. The battery management system, fuel cell system, and vehicle peripheral system send their respective system status data to the vehicle controller through the CAN communication bus. The vehicle controller performs its own logical operations based on the electrical signal 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 fuel cell controller status data and the status data of each vehicle peripheral. Finally, it determines whether the fuel cell controller needs to be started, and sends the start command to the fuel cell controller through the CAN bus. The fuel cell controller, as an actuator, starts the equipment in the fuel cell system according to the designed process after receiving the start command from the vehicle controller, realizing the start of the hydrogen-electric system, which greatly reduces the development cost of system start and shortens the development cycle.

[0034] 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

[0035] The accompanying drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with this specification, and are used together with the specification to explain the principles of this specification.

[0036] Figure 1It is a structural block diagram of a hydrogen electric vehicle shown in accordance with an embodiment in this specification;

[0037] Figure 2 It is a topology diagram of the hydrogen electric system in a hydrogen electric vehicle shown in accordance with an embodiment in this specification;

[0038] Figure 3 It is a flowchart of a starting control method for a hydrogen electric vehicle shown in accordance with an embodiment in this specification;

[0039] Figure 4 It is a schematic block diagram of a computer device shown in accordance with an embodiment in this specification. Detailed implementation manners

[0040] 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 accompanying drawings in this application. Apparently, 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 creative efforts shall fall within the scope of protection of this application.

[0041] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those of ordinary skill in the field to which this application belongs. The "first", "second" and similar terms 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, the similar terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one. "Multiple" or "several" means two or more. The terms such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The terms such as "connect" or "couple" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0042] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "the" and "said" used in this application are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0043] The present application provides a start control method, a controller and a storage medium for a hydrogen-electric vehicle. The present application will be described in detail below with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0044] 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 a hybrid new energy vehicle and other vehicles with 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.

[0045] The battery management system and the vehicle controller described in this specification have the conventional structures and functions of vehicles on the current market (such as the structure, working mode, interface, etc. of the power battery pack in the battery management system), and will not be specifically introduced herein.

[0046] The core of hydrogen-electric technology lies in the hydrogen fuel cell. Among them, the 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 emission, pollution-free, and recyclability. However, there are not many cases of hydrogen-electric technology equipped on passenger cars, resulting in many core functions and control strategies not being mature and not forming a platformized strategic plan. Each OEM (Original Equipment Manufacture) designs and develops independently, lacking reference and resulting in repeated problems and low reuse rate, greatly wasting manpower and material resources, and failing to form the common growth of the industry. This includes the start control strategy of hydrogen-electric vehicles. When dealing with hydrogen-electric vehicles with different configurations, the start process control strategy of hydrogen-electric vehicles does not have a platformized solution, resulting in very low applicability, and thus leading to very high development costs and development cycles.

[0047] To solve the above technical problems, this specification provides a start control method for a hydrogen-electric vehicle.

[0048] The hydrogen-electric system is installed in the power domain of the vehicle in a discrete manner, and the hydrogen-electric system sends its status data to the vehicle controller. The vehicle controller controls the start of the hydrogen-electric system according to the status data of the hydrogen-electric system and the status data of each peripheral device of the vehicle.

[0049] Among them, the discrete type means that the vehicle controller performs a logical operation on whether to start the hydrogen-electric system based on the collected information. For the start instruction made after the logical operation, the hydrogen-electric system responds, and the hydrogen-electric system independently controls its start process, that is, the two perform information interaction but operate independently.

[0050] Specifically, as Figure 1 shown, Figure 1 The structural block diagram of an embodiment of a hydrogen-electric vehicle.

[0051] The hydrogen-electric system of the hydrogen-electric vehicle includes multiple systems, and the multiple systems include: a fuel cell system 100, a battery management system 200, a vehicle peripheral system 300, and a vehicle controller 400. The vehicle controller 400 is the core control unit of the hydrogen-electric vehicle, and is bidirectionally communicatively connected to the fuel cell system 100, the battery management system 200, and the vehicle peripheral system 300 respectively to perform information interaction, and processes the received information to make reasonable instructions for implementing the start control method of the hydrogen-electric vehicle provided by the present application to achieve vehicle control.

[0052] Among them, the fuel cell system 100 includes a fuel cell controller 110, and the fuel cell controller 110 is used to control the start of the fuel cell system and is communicatively connected to the vehicle controller 400.

[0053] The fuel cell system 100 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 12, a humidity regulating valve 13, an air main path valve 14, 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) 32, 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 41, such as a DCF converter (DC Converter for Fuel Cell EV); a second converter 42, 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 43, etc.

[0054] As Figure 2 shown, Figure 2 Figure Figure 2 is the topology diagram of the discrete hydrogen - electric system installation scheme.

[0055] The fuel cell controller 110 is connected to the fuel cell inspection module 43 through the first CAN bus (CAN0 shown in the figure). The fuel cell inspection module 43 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.

[0056] The fuel cell controller 110 is connected to the vehicle controller 400 through the second CAN bus (CAN1 shown in the figure) and PCAN, and is used to interact with the vehicle controller 400, receive the electrical signals of the vehicle controller 400, or send the electrical signals of the fuel cell system to the vehicle controller 400.

[0057] The fuel cell controller 110 is connected to the components in the BOP auxiliary system and the HMS (Hydrogen Management System) 44 through the third CAN bus (CAN2 shown in the figure), and is used to control the start - up of the fuel cell system and the feedback of the start - up state.

[0058] The fuel cell controller 110 obtains the flashing file of the fuel cell controller through the fourth CNA bus (CAN3 shown in the figure), and is used to flash the software required for the vehicle to control the normal operation of the vehicle.

[0059] In this embodiment, a discrete hydrogen - electric system installation scheme is adopted. The fuel cell controller sends the fuel cell system status data to the vehicle controller through the CAN communication bus. After receiving the status data of the fuel cell controller and the status data of each vehicle peripheral, the vehicle controller performs logical operations, and finally determines whether the fuel cell controller needs to be started, and sends the start - up instruction to the fuel cell controller through the fuel cell controller bus. When the fuel cell controller receives the start - up instruction from the vehicle controller, the fuel cell controller starts the equipment in the fuel cell system according to the designed process. The platform - based control strategy reduces the development difficulty of adjustment and expansion, greatly reduces the development cost and shortens the development cycle.

[0060] As an example, the discrete hydrogen - electric system installation scheme can be used in the mass - production stage.

[0061] Based on the hydrogen - electric powered vehicle corresponding to the above - mentioned installation method, this specification provides a start - up control method for a hydrogen - electric powered vehicle.

[0062] As Figure 3 shown, Figure 3It is a flowchart of a method shown in this specification according to an exemplary embodiment, including the following steps:

[0063] In step 101, if the multiple systems pass the self-check and are in a low-voltage state, obtain the system status information obtained by detecting the devices in the multiple systems.

[0064] In step 102, if the system status information indicates that the whole vehicle meets the condition for applying high voltage, send a closing instruction to close the high-voltage relay of the battery management system to the battery management system.

[0065] In step 103, 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 start instruction to the fuel cell controller to control the start of the fuel cell system.

[0066] As an example, the hydrogen-electric vehicle includes a battery management system, a vehicle controller, a fuel cell system, and a vehicle peripheral system. The fuel cell system includes a fuel cell controller. The vehicle 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 vehicle controller.

[0067] The above-mentioned vehicle peripheral system refers to the collective name of other peripherals of the vehicle except the fuel cell system, the vehicle controller, and the battery management system. These peripherals are related to the power-on function of the vehicle, such as an anti-theft controller, a TBOX remote controller (Telematics Box, remote communication system controller), etc. These peripherals provide the conditions for whether the vehicle can apply high voltage.

[0068] The start process of the hydrogen-electric system mainly includes two parts: applying high voltage to the vehicle 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 starts successfully.

[0069] In step 101, the operating state of the vehicle is detected before applying high voltage to the vehicle to perform accurate work before applying high voltage.

[0070] As an example, in step 1011, after the vehicle is powered on, the fuel cell controller, the vehicle controller, the battery management system, and the vehicle peripheral system are awakened. After being awakened, the fuel cell controller, the vehicle 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 self-check status data to the vehicle controller through the CAN bus and execute step 1012. At the same time, the vehicle control performs anti-theft authentication.

[0071] When the vehicle is powered on as described in this article, when the key presses the unlock button, or the door is opened, or the start button is pressed, the wake-up signal is forwarded to the vehicle control unit through the gateway, and the vehicle control unit is woken up. After the vehicle control unit is woken up, it controls the low-voltage relay box to supply low voltage to other ECUs (Electronic Control Unit), and wakes up the corresponding ECUs by sending network management, including the fuel cell controller, battery management system, and vehicle peripheral system.

[0072] In step 1012, after the vehicle control unit receives the data of the corresponding self-check status, it determines whether the start requirements are met according to the data of the self-check status of each peripheral. For example, whether the voltage status of each peripheral (including the low-voltage motor, relay for controlling the power battery pack, etc.) can meet the equipment working status requirements. If the vehicle control unit passes the anti-theft authentication and the self-check status of each peripheral indicates that the self-check is passed, the vehicle control unit controls the fuel cell controller, battery management system, and vehicle peripheral system to supply low voltage respectively, and continues to execute step 1013.

[0073] During the process of supplying low voltage, the vehicle control unit closes the CPSR (Charge Power Sustain Relay), and the CPSR will supply low voltage to the peripherals on the CPSR line, including the high-voltage relay of the battery management system, fuel cell controller, motor controller, battery controller, and pre-charge relay.

[0074] When the vehicle control unit closes the CPSR, it sends a low-voltage power-on command allowing low-voltage power-on to each peripheral such as the fuel cell controller, battery management system, and vehicle peripheral system, so as to control the battery management system, fuel cell system, and vehicle peripheral system to output low voltage to the devices in their respective systems after receiving the low-voltage power-on command.

[0075] If any one of the vehicle control unit anti-theft authentication and the self-check of each peripheral fails, the fuel cell system start process ends.

[0076] In some embodiments, after the fuel cell controller, battery management system, and vehicle peripheral system pass the self-check, they read the historical fault information stored in their respective internal memories, and analyze whether there are advanced faults in the historical fault information. If no advanced faults are found, it indicates that the vehicle system is in a normal standby start state, including the fuel cell system, and continues to execute step 1013. If it is found that there are advanced faults, the fuel cell system is controlled to cut off the low voltage and start is prohibited; or the start process ends.

[0077] The advanced faults described in this article refer to faults that have a very adverse impact on the operation after the vehicle starts (such as difficult to stop, power off, etc.). For example, vehicle system short circuit, motor failure, thermal runaway of the power battery pack, etc. Advanced faults can be set before the hydrogen-electric system starts. When analyzing historical fault information, it is compared with the pre-set advanced fault library to determine whether there are advanced faults in the historical fault information.

[0078] The historical fault information described in this article refers to the fault information recorded after detecting the systems in the vehicle after the vehicle is powered on.

[0079] In some embodiments, the memories of the fuel cell controller, the battery management system, and the vehicle peripheral system respectively store the historical fault information of multiple detections of the systems in the vehicle. After 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.

[0080] In other embodiments, the fuel cell system, the battery management system, and the vehicle peripheral system also respectively include low-voltage relays. The low-voltage relays are connected between other peripherals in their respective systems (the other peripherals refer to the hardware devices in their respective systems except the low-voltage relays) and the low-voltage battery. After each system receives the low-level signal of the low-voltage power-on command, the contacts of the low-voltage relay close, allowing the electrical equipment on the current path to operate.

[0081] The low-level signals described in this article are, for example, signals of 12V and 24V.

[0082] Step 1013, the vehicle 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 vehicle controller, and then execute step 102.

[0083] 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 vehicle controller.

[0084] The detection described in this article refers to the self-check of the peripherals inside and outside the battery management system, fuel cell system, and vehicle peripheral system. For example, if there is a high-level fault that causes the fuel cell system to malfunction, system status information indicating that the equipment inside the fuel cell system does not have the ability to work properly is obtained, and then the fuel cell system is controlled to cut off the low-voltage power supply to prohibit starting or end the starting process. If there is no high-level fault that causes the fuel cell system to malfunction, system status information indicating that the equipment inside the fuel cell system is in a state of having the ability to work properly is obtained, and step 102 is continued to be executed.

[0085] The high-level faults described in this article refer to faults that have a very adverse impact on the operation of the whole vehicle (such as difficult to stop, power-off, etc.) on the operation status of the internal and external equipment of the system after the battery management system, fuel cell system, and vehicle peripheral system are powered on with low voltage. For example, the whole vehicle system short circuit, motor fault, thermal runaway of the power battery pack, hydrogen leakage in the hydrogen storage tank or transmission pipeline, etc.

[0086] In some embodiments, if there is a high-level fault that causes the battery management system, fuel cell system, and vehicle peripheral system 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 system respectively, providing basic judgment information for the next power-on of the hydrogen-electric system.

[0087] In step 102, the vehicle controller combines the system status information of each system to judge whether the whole vehicle meets the condition of applying high voltage. If the system status information indicates that the whole vehicle meets the condition of applying high voltage, that is, the vehicle can apply high voltage, then high-voltage control is performed.

[0088] 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 whole vehicle. Only when the high-voltage relay is closed can the power battery pack output power to the whole vehicle.

[0089] The control of the high-voltage relay is to output a high-level signal or a low-level signal from the battery management system to the coil of the relay, thereby controlling the disconnection and closing of the high-voltage relay. Therefore, the vehicle 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 whole vehicle. And the status of the high-voltage relay is sent to the vehicle controller in real time.

[0090] When the real-time status of the high-voltage relay indicates that the high-voltage relay is in an unclosed state, the fuel cell system is controlled to cut off the low-voltage power supply to prohibit starting, or end the starting process, or not send an instruction to start the fuel cell system.

[0091] When the real-time state of the high-voltage relay indicates that the high-voltage relay is in the closed state, step 103 is continued to be executed.

[0092] In step 103, the vehicle controller receives the electrical signal of the real-time state of the high-voltage relay fed back by the battery management system, and at the same time judges whether the system states of the battery management system, the fuel cell system, and the vehicle peripheral system respectively allow the fuel cell system to start according to the system state information. At the same time, the vehicle controller sends an allow-work instruction to the battery management system and the vehicle peripheral system respectively, so as to control the battery management system and the vehicle peripheral system to start normal work after receiving the allow-work instruction.

[0093] It should be noted that the operations of the vehicle controller obtaining the real-time state of the feedback high-voltage relay and judging 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 high voltage on the vehicle and the fuel cell system are in a ready state for power release at any time, and is used to control the start of the hydrogen-electric system.

[0094] As an example, if an electrical signal indicating that the high-voltage relay feedback by the battery management system is in the closed state and the system state information indicates that the fuel cell system is allowed to start is received, a start instruction is sent to the fuel cell controller to control the start of the fuel cell system. Step 1031 is continued to be executed.

[0095] If the vehicle controller determines that the vehicle does not meet any of the requirements that the high-voltage relay is in the closed state and the system state information indicates that the fuel cell system is allowed to start, the start instruction of the fuel cell system is not sent or the start process is ended.

[0096] The system state information in this article is also used to judge whether the system states allow the fuel cell system to start. After both the high voltage on the vehicle and the start of the fuel cell system are in a ready state for power release at any time, it is considered that the hydrogen-electric system starts successfully.

[0097] In some embodiments, the power domain peripherals of the hydrogen-electric vehicle further include a power battery pack. The power battery pack is a high-voltage component, which 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.

[0098] That is, if an electrical signal indicating that the high-voltage relay feedback by the battery management system is in the closed state is received and it is judged that the power battery pack is in a state of waiting to be charged, a start instruction is sent to the fuel cell controller to control the start of the fuel cell system.

[0099] As an example, the system state information for determining that the power battery pack is in a state to be charged includes the operating state data of the power battery pack, the state of charge of the battery, and the rechargeable power. The vehicle controller obtains the system state information of the power battery pack sent by the battery management system through the CAN bus, and obtains the system state information of the maximum and minimum power that can be provided by the fuel cell system and the standby discharge power of the fuel cell system sent by the fuel cell system through the CAN bus.

[0100] As an example, after receiving the system state information of each system, the vehicle controller determines whether the power battery pack is in a state to be charged. The specific process is as follows:

[0101] Step 1031, the vehicle controller obtains the operating state data of the power battery pack, analyzes the operating 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 does not have a fault state, or 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. If the power battery pack has a fault state and this fault causes the hydrogen-electric system to not operate, then the start instruction of the fuel cell system is not sent or the start process is ended.

[0102] In this article, the power battery pack has a fault state and this fault causes the hydrogen-electric system to not operate. Corresponding operating state data, for example, the fault of the power battery pack prohibiting charging, the fault of the power battery pack insulation, etc.

[0103] Step 1032, the vehicle 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.

[0104] 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 the start instruction of the fuel cell system is not sent or the start process is ended.

[0105] 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 the start instruction of the fuel cell system is not sent or the start process is ended.

[0106] Step 1033: The vehicle controller analyzes the power battery pack to determine whether there is a charging requirement based on the rechargeable power obtained from the power battery pack, i.e., the power that can be charged, which is related to the battery SOC. This is done by considering the standby discharge power of the fuel cell system.

[0107] Under normal circumstances, the fuel cell system still supplies air and hydrogen to the fuel cell stack in the fuel cell system in standby state (such as when waiting for traffic lights while parking) 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 battery SOC of 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 in the standby state, and this standby discharge power is not zero.

[0108] The vehicle 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 requirement, 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 requirement, so the start instruction of the fuel cell system is not sent or the start process is ended.

[0109] Through the above steps, the vehicle controller determines whether the power battery pack is in a state to be charged based on the system status 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 vehicle powers on to high voltage, it indicates that the hydrogen-electric system has started, and the start control process of this hydrogen-electric vehicle ends.

[0110] As an example, the process of starting the fuel cell system is as follows in Steps 1041 to 1043, and the start status of the fuel cell system is sent to the vehicle controller through the fuel cell controller, and then Step 105 is continued:

[0111] Step 1041: After receiving the start instruction sent by the vehicle controller, the fuel cell controller obtains the ambient temperature value of the fuel cell system.

[0112] 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 directly affect the performance and lifespan of the fuel cell. Under normal circumstances, the operating temperature of the fuel cell is usually 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 demand. Therefore, in order to ensure the normal operation of the fuel cell, its temperature needs to be controlled.

[0113] Step 1042: 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.

[0114] The cold start threshold described in this article refers to the expected operating temperature of the fuel cell. If the ambient temperature value is greater than the cold start threshold, control the fuel cell system to enter the normal start mode and execute Step 1043.

[0115] If the ambient temperature value is less than or equal to the cold start threshold, control the fuel cell system 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.

[0116] 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 the 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, thus affecting the output power and efficiency of the fuel cell system, resulting in a very low output power of the fuel cell system, which cannot 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, execute Step 1043.

[0117] 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, control the temperature of the fuel cell system through external heating or cooling methods, such as electric heating and catalytic combustion heating; on the other hand, control the temperature of the fuel cell system through 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 waterway 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, control the PTC heater to heat the coolant, and the coolant enters the fuel cell stack through the water pump to achieve heating of the fuel cell system.

[0118] In 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. Control the air compressor in the fuel cell system to control the pressure of the air delivered to the fuel cell stack.

[0119] Step 1043: Control the fuel cell system to perform purging and loading to complete the startup of the fuel cell system. And send the startup status of the fuel cell system to the vehicle controller in real time.

[0120] Specifically, the fuel cell controller controls the opening of the purging-related devices in the fuel cell system to perform purging. And controls the opening of the loading-related devices in the fuel cell system to perform loading.

[0121] The purging described in this article refers to 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.

[0122] The loading described in this article refers to the process in which hydrogen and oxygen react in the fuel cell system to increase the output power.

[0123] As an example, the fuel cell controller turns on peripherals such as the ejector, hydrogen circulation pump, hydrogen and air throttle valves, and air compressor to perform purging, and monitors the purging status in real time, such as the hydrogen concentration. If the purging is completed, the hydrogen and air throttle valves are closed to stop purging, otherwise continue purging. After purging is completed, the fuel cell controller turns on the DCF converter and performs loading, monitors parameters such as the loading power and current. After the loading is completed, it is determined that the startup of the fuel cell system is completed, and the startup completion status of the fuel cell system is sent to the vehicle controller.

[0124] Step 105: When the vehicle controller receives the information on the startup status sent by the fuel cell controller, if the information on the startup status indicates that the fuel cell system is in the startup completed state, 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.

[0125] The present application provides a starting control method, a controller and a storage medium for a hydrogen-electric vehicle, which are applied to a vehicle controller. Without damaging the original vehicle architecture, the present application integrates the hydrogen-electric system into the vehicle's power domain in a discrete manner, establishes two-way communication connections between the vehicle 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 vehicle controller through the CAN communication bus. The vehicle controller performs its own logical operations based on the electrical signal that the high-voltage relay feedback by the battery management system is in the closed state, and the system status information corresponding to the fuel cell controller status data and the status data of each vehicle peripheral, and finally determines whether the fuel cell controller needs to be started, and sends the start instruction to the fuel cell controller through the CAN bus. The fuel cell controller, as an actuator, starts the equipment in the fuel cell system according to the design process after receiving the start instruction from the vehicle controller, realizing the start of the hydrogen-electric system, which greatly reduces the development cost of system start and shortens the development cycle.

[0126] Based on the same inventive concept as the above method, corresponding to the embodiments of the foregoing method, the present specification also provides an embodiment of a computer device.

[0127] As Figure 4 shown, it is a schematic block diagram of a computer device in the present specification, which is used to implement the starting control method of the above hydrogen-electric 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. The starting control program of the hydrogen-electric vehicle is stored on the non-volatile memory 540 and can be run on the processor 510. When the starting control program of the hydrogen-electric vehicle is executed by the processor 510, it can be used to implement the starting control method of the hydrogen-electric 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.

[0128] The above describes specific embodiments of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve the desired result. Additionally, the processes depicted in the figures do not necessarily require the particular order or sequential order shown to achieve the desired result. In certain implementations, multitasking and parallel processing are also possible or may be advantageous.

[0129] Those skilled in the art will readily conceive of other embodiments of the present specification after considering the specification and practicing the invention claimed herein. This specification is intended to cover any variations, uses, or adaptations of the present specification, which follow the general principles of the present specification and include known common general knowledge or conventional technical means in the technical field not claimed in the present specification. The specification and examples are only to be regarded as exemplary, and the true scope and spirit of the present specification are pointed out by the following claims.

[0130] It should be understood that this specification is not limited to the exact structures already described 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.

[0131] 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 of protection of this specification.

Claims

1. A starting control method for a hydrogen-electric vehicle, characterized in that, The hydrogen-electric vehicle includes multiple systems, and the multiple systems include a battery management system, a vehicle controller, a fuel cell system, and a vehicle peripheral system. The fuel cell system includes a fuel cell controller. The vehicle controller is bi-directionally communicatively connected to the fuel cell controller, the battery management system, and the vehicle peripheral system respectively. The method is applied to the vehicle controller and includes: If the multiple systems pass the self-check and are in a low-voltage state, obtain the system status information obtained by detecting the devices in the multiple systems; 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 of the battery management system 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 start instruction to the fuel cell controller to control the start of the fuel cell system.

2. The starting control method of the hydrogen-electric vehicle according to claim 1, characterized in that, The step of if the multiple systems pass the self-check and are in a low-voltage state, obtain the system status information obtained by detecting the devices in the multiple systems, includes: When the multiple systems are woken up for self-check, perform anti-theft authentication; Receive the self-check status of the multiple systems; If the self-check status indicates that the self-check is passed and the anti-theft authentication is passed, control the multiple systems to be powered down at low voltage respectively; After obtaining the low-voltage power supply for the multiple systems, obtain the system status information obtained by detecting the devices in their respective systems.

3. The starting control method of the hydrogen electric vehicle according to claim 2, characterized in that, The step of if the self-check status indicates that the self-check is passed and the vehicle controller passes the anti-theft authentication, control the multiple systems to be powered down at low voltage 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 instruction to the battery management system, the fuel cell system, and the vehicle peripheral system to control the closing of the low-voltage relays in the battery management system, the fuel cell system, and the vehicle peripheral system to supply low-voltage power for the devices in their respective systems.

4. The starting control method of the hydrogen-electric powered vehicle according to claim 1, characterized in that The condition of allowing the fuel cell system to start includes that the power battery pack in the battery management system is in a state of waiting for charging; The step of 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 start instruction to the fuel cell controller to control the start of the fuel cell system, includes: If an electrical signal indicating that the high-voltage relay is in a closed state is received from the battery management system, send an allow-operation instruction to the battery management system and the vehicle peripheral system respectively to control the operation of the battery management system and the vehicle peripheral system; If the system status information indicates that the power battery pack is in a state of waiting for charging, send a start instruction to the fuel cell controller to control the start of the fuel cell system.

5. The starting control method of the hydrogen-electric powered vehicle according to claim 4, 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; If the system status information indicates that the power battery pack is in a state to be charged, send a start command to the fuel cell controller to control the start of the fuel cell system, including: If it is determined according to the fault data that the power battery pack is in an allowed charging state, 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 start command to the fuel cell controller to control the start of the fuel cell system.

6. The starting control method of the hydrogen electric vehicle according to claim 1, characterized in that, The sending a start command to the fuel cell controller to control the start of the fuel cell system includes: Send a start command to the fuel cell controller to control the start of the fuel cell system, so that after the fuel cell controller receives the start command, it controls the fuel cell system to purge and load, and sends the start state of the fuel cell system to the vehicle controller; If it is received that the start state indicates that the fuel cell system is in a start-completed state, determine that the start of the fuel cell system is completed.

7. The starting control method of the hydrogen-electric powered vehicle according to claim 6, characterized in that, The method further includes: Send a start command to the fuel cell controller to control the start of the fuel cell system, so that after the fuel cell control receives the start command, it obtains the ambient temperature value of the fuel cell system, and if the ambient temperature value is greater than the cold start threshold, controls the fuel cell system to purge and load, and sends the start state of the fuel cell system to the vehicle controller.

8. The starting control method of the hydrogen-electric vehicle according to claim 6, characterized in that, The method further includes: Send a start command to the fuel cell controller to control the start of the fuel cell system, so that after the fuel cell control receives the start command, it obtains the ambient temperature value of the fuel cell system. If the ambient temperature value is less than or equal to the cold start threshold, it controls the fuel cell system to warm up to obtain a new ambient temperature value, and if the new ambient temperature value is greater than the cold start threshold, it controls the fuel cell system to purge and load, and sends the start state of the fuel cell system to the vehicle controller.

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

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

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