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

Abstract

The invention provides a starting control method, a controller and a storage medium of a hydrogen-electric power automobile, which are applied to a central controller, on the basis of not destroying the original framework of the whole automobile, a chassis domain and a power domain are fused to form the central controller, and the central controller is directly connected with peripheral equipment, so that the starting of the hydrogen-electric power automobile is realized. Controlling the high voltage of the high-voltage system and controlling the fuel cell system to start when the high-voltage relay is in a closed state and the second detection result represents that the power battery pack meets the preset operation condition, thereby greatly reducing the development cost of system starting and shortening the development period.

Description

Technical Field

[0001] The present application relates to the field of automotive control technologies, and in particular, to a start 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 in 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 start control strategy of hydrogen-electric vehicles.

[0003] Currently, for hydrogen-electric vehicles with different configurations, there is no platformized solution for the start-up 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, which is applied to the central controller of the hydrogen-electric vehicle. The central controller is used to control the power domain and the chassis domain of the hydrogen-electric vehicle. The central controller is bidirectionally communicatively connected to the high-voltage system, the fuel cell system in the power domain, and the chassis system in the chassis domain respectively. The method includes:

[0006] If the self-check of the central controller passes, control the low-voltage power supply of the high-voltage system, the fuel cell system, and the chassis system, and obtain the first detection result of the operating states of the high-voltage system, the fuel cell system, and the chassis system after obtaining the low-voltage power supply;

[0007] If the first detection result indicates that the high-voltage system, the fuel cell system, and the chassis system are in a normal operating state, send a closing instruction to the high-voltage relay of the high-voltage system;

[0008] Detect the operating state of the power battery pack in the high-voltage system to obtain a second detection result;

[0009] If the high-voltage relay is in a closed state and the second detection result indicates that the power battery pack meets the preset operating conditions, control the fuel cell system to start.

[0010] A starting control method for a hydrogen-electric vehicle provided by the present application, where the satisfaction of the preset operating conditions includes that the power battery pack is in a state to be charged;

[0011] The step of, if the high-voltage relay is in a closed state and the second detection result indicates that the power battery pack satisfies the preset operating conditions, controlling the start of the fuel cell system, includes:

[0012] If the high-voltage relay is in a closed state and the second detection result indicates that the power battery pack is in a state to be charged, control the start of the fuel cell system.

[0013] A starting control method for a hydrogen-electric vehicle provided by the present application, where the second detection result includes the operating state data of the power battery pack, the state of charge of the battery, and the rechargeable power;

[0014] The step of, if the high-voltage relay is in a closed state and the second detection result indicates that the power battery pack is in a state to be charged, controlling the start of the fuel cell system, includes:

[0015] If the high-voltage relay is in a closed state, and it is determined according to the operating state data that the power battery pack is in a state 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, control the start of the fuel cell system.

[0016] A starting control method for a hydrogen-electric vehicle provided by the present application, where the step of controlling the start of the fuel cell system includes:

[0017] Control the opening of the devices related to the purging operation in the fuel cell system. In response to the purging operation, the devices related to the purging operation include a hydrogen throttle valve and an air throttle valve;

[0018] Real-time monitor the purging state corresponding to the purging operation;

[0019] If the purging is completed, control the closing of the hydrogen and air throttle valves;

[0020] Obtain the operating power of the fuel cell system;

[0021] Adjust the input ratio of the hydrogen throttle valve and the air throttle valve so that the operating power meets the demand of the state of charge of the vehicle battery;

[0022] Control the start of the DC converter in the fuel cell system and perform loading;

[0023] Obtain the loading data;

[0024] If the pulled data reaches a preset value, it is determined that the startup of the fuel cell system is completed.

[0025] According to a startup control method for a hydrogen-electric vehicle provided by the present application, before controlling the opening of the devices related to the purging operation in the fuel cell system, it includes:

[0026] Collect the ambient temperature value of the fuel cell system in real time;

[0027] If the ambient temperature value is greater than the cold startup threshold, control the opening of the devices related to the purging operation in the fuel cell system.

[0028] According to a startup control method for a hydrogen-electric vehicle provided by the present application, the method further includes:

[0029] If the ambient temperature value is less than or equal to the cold startup threshold, control the startup of the heat management related devices in the fuel cell system to heat the fuel cell system, and obtain a new ambient temperature value;

[0030] If the new ambient temperature value is greater than the cold startup threshold, control the heat management related devices to stop;

[0031] Control the opening of the devices related to the purging operation in the fuel cell system.

[0032] According to a startup control method for a hydrogen-electric vehicle provided by the present application, if the self-check of the central controller passes, control the low-voltage power supply of the high-voltage system, the fuel cell system, and the chassis system, and obtain the first detection result of the operating states of the high-voltage system, the fuel cell system, and the chassis system after applying the low-voltage power supply, including:

[0033] Perform self-check after the central controller is awakened;

[0034] If the self-check passes, judge whether the hydrogen-electric vehicle is in a normal standby operating state according to the historical fault information in the central controller;

[0035] If the hydrogen-electric vehicle is in a normal standby operating state, respectively control the closing of the low-voltage relays in the high-voltage system, the fuel cell system, and the chassis system to apply low-voltage power to the high-voltage system, the fuel cell system, and the chassis system;

[0036] Respectively obtain the operating state data of each device in the high-voltage system, the fuel cell system, and the chassis system;

[0037] Judge the real-time fault information of the device according to the operating state data to obtain the first detection result.

[0038] A starting control method for a hydrogen-electric vehicle provided by the present application, the method further includes:

[0039] If the first detection result indicates that the high-voltage system, the fuel cell system, and the chassis system are not in a normal operating state, control the high-voltage system and the fuel cell system to cut off the low voltage.

[0040] A starting control method for a hydrogen-electric vehicle provided by the present application, if the first detection result indicates that the high-voltage system, the fuel cell system, and the chassis system are in a normal operating state, sending a closing instruction to the high-voltage relay of the high-voltage system, includes:

[0041] If the first detection result indicates that the high-voltage system, the fuel cell system, and the chassis system are in a normal operating state;

[0042] Obtain the status information of the power domain and the chassis domain;

[0043] If the status information indicates that the hydrogen-electric vehicle is allowed to go on high voltage, send a closing instruction to the high-voltage relay of the high-voltage system.

[0044] The present application also provides a central 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 starting control method of the hydrogen-electric vehicle as described in any one of the above.

[0045] 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 starting control method of the hydrogen-electric vehicle as described in any one of the above.

[0046] In the embodiment of the present specification, the starting control method, controller, and storage medium of the hydrogen-electric vehicle are applied to the central controller. Without destroying the original architecture of the whole vehicle, by integrating the chassis domain and the power domain to form a central controller, the central controller is directly connected to the peripherals, controls the high-voltage system to go on high voltage, and controls the fuel cell system to start when the high-voltage relay is in the closed state and the second detection result indicates that the power battery pack meets the preset operating conditions. It greatly reduces the development cost of system startup and shortens the development cycle.

[0047] 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

[0048] The accompanying drawings here are incorporated into the specification and form 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.

[0049] Figure 1 is a topological diagram of the hydrogen-electric system in a hydrogen-electric vehicle shown according to an exemplary embodiment of this specification;

[0050] Figure 2 is a flowchart of a start control method for a hydrogen-electric vehicle shown according to an exemplary embodiment of this specification;

[0051] Figure 3 is a schematic block diagram of a computer device shown according to an exemplary embodiment of this specification. Detailed Embodiments

[0052] 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. 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 creative efforts shall fall within the scope of protection of this application.

[0053] 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 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 quantity limitation, but mean that there is at least one. "Multiple" or "several" means two or more. "Including" or "comprising" and similar words mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Connecting" or "coupling" and similar words are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0054] 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 "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" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0055] The present application provides a starting 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.

[0056] 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.

[0057] The high-voltage system, the chassis system in the chassis domain, and the fuel cell 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 high-voltage system), and will not be specifically introduced herein.

[0058] 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 emissions, pollution-free, and recyclability. However, there are not many cases of hydrogen-electric technology equipped on passenger vehicles, resulting in the immaturity of many core functions and control strategies and the failure to form a platformized strategic solution. Each OEM (Original Equipment Manufacture) designs and develops independently, lacking reference, resulting in repeated problems and low reuse rate, greatly wasting manpower and material resources, and failing to achieve common growth in the industry. This includes the starting control strategy of hydrogen-electric vehicles. When dealing with hydrogen-electric vehicles with different configurations, the starting process control strategy of hydrogen-electric vehicles does not have a platformized solution, resulting in very low applicability, and thus leading to high development costs and long development cycles.

[0059] To solve the above technical problems, this specification provides a starting control method for a hydrogen-electric vehicle.

[0060] By integrating the chassis domain and the power domain to form a central controller, the central controller is directly connected to the peripherals, obtains the required information and determines the actions to be performed by each peripheral to control the peripheral drive and control the start-up of the hydrogen-electric system. The peripherals refer to the hardware devices on the vehicle other than the central controller.

[0061] The central controller described in this article is an all-in-one controller that integrates functional modules such as vehicle control, thermal management control, chassis EPB and fuel-electric system control. The central controller drives peripherals in the following ways: communication, level, pulse signal, etc.

[0062] The central controller of the hydrogen-electric vehicle is used to control the power domain and chassis domain of the hydrogen-electric vehicle. The central controller is connected to the high-voltage system, the fuel cell system in the power domain, and the chassis system in the chassis domain in a two-way communication manner to exchange information, and to process the received information to make reasonable instructions to implement the start-up control method of the hydrogen-electric vehicle provided in this application and realize the control of the entire vehicle.

[0063] The fuel cell system in the hydrogen-electric system includes an FCU (Fuel-cell Control Unit), 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 heat management system, and an electrical system. The air supply system is used to provide the fuel cell with oxygen required for the reaction to ensure the reaction. It includes an air compressor 11, a back pressure valve 12, a humidity control valve 13, an air main valve 14, an air filter, etc. The hydrogen supply system is used to provide the required hydrogen to the fuel cell, circulate the hydrogen in the hydrogen pipeline of the fuel cell, improve the utilization rate of hydrogen and remove liquid water in the anode. It includes a hydrogen circulation pump 15, a diverter throttle 16, etc. The water heat management system is used to provide a good working temperature for the fuel cell controller, and includes a water pump 17, a PCT18 (Positive Temperature Coefficient, heater), etc. The electrical system is used to provide the required voltage of the whole vehicle and the required electrical energy of the components. It includes a first converter 19, such as a DCF converter (DC Converter for FuelCell 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 20, etc.

[0064] like Figure 1 As shown, Figure 1 This is the topology diagram of the hydrogen-electric system solution for this application.

[0065] The central controller 100 is connected to the battery management system controller 31, the motor controller 32, the charging controller 33 (including on-board charger, DCDC converter, high-voltage control box), the gear controller 34, and the chassis controller 35 through the first CAN bus (shown as PCAN).

[0066] The central controller is connected to the components in the BOP auxiliary system, the fuel cell display component, and HMS41 (Hydrogen Management System) through the second CAN bus (shown as CAN2). For example, the central controller is communicatively connected to the fuel cell display component, and the central controller is used to control the display information of the fuel cell display component according to the operating state of the fuel cell system.

[0067] The central controller is connected to the battery three-way valve 51, the high-voltage water heater 52, the compressor 53, the electric drive rear three-way valve 54, the battery four-way valve 55, and the high-voltage air heater 56 through the first LIN bus (shown as LIN1).

[0068] The central controller is connected to the electric drive rear expansion valve 61, the electric drive expansion valve 62, the heat pump expansion valve 63, and the battery expansion valve 64 through the second LIN bus (shown as LIN3).

[0069] The central controller obtains the programming file of the central controller through the third CNA bus (shown as CAN3) for programming the software required for the whole vehicle to control the normal operation of the whole vehicle.

[0070] In this embodiment, a fusion hydrogen-electric system mounting scheme is adopted, in which the chassis domain and the power domain are fused to form a central controller. The central controller is directly connected to the peripherals, collects the states of each peripheral through control, determines the actions to be performed by each peripheral after logical operation, and directly drives the peripherals, greatly reducing the development and time costs.

[0071] As an example, the fusion hydrogen-electric system mounting scheme can be used in the mass production stage.

[0072] Based on the hydrogen-electric powered vehicle corresponding to the above mounting method, this specification provides a starting control method for a hydrogen-electric powered vehicle.

[0073] 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:

[0074] In step 101, if the self-check of the central controller passes, control the low-voltage power supply of the high-voltage system, the fuel cell system, and the chassis system, and obtain the first detection result of the operating states of the high-voltage system, the fuel cell system, and the chassis system after obtaining the low-voltage power supply.

[0075] In step 102, if the first detection result indicates that the high-voltage system, the fuel cell system, and the chassis system are in a normal operating state, send a closing instruction to the high-voltage relay of the high-voltage system.

[0076] In step 103, detect the operating state of the power battery pack in the high-voltage system to obtain a second detection result.

[0077] In step 104, if the high-voltage relay is in a closed state and the second detection result indicates that the power battery pack meets the preset operating conditions, control the fuel cell system to start.

[0078] As an example, the hydrogen-electric vehicle includes a central controller. The central controller is used to control the power domain and the chassis domain of the hydrogen-electric vehicle, and is bidirectionally communicatively connected to the high-voltage system, the fuel cell system, and the chassis system in the chassis domain. The start control method of the hydrogen-electric vehicle is applied to the central controller.

[0079] Among them, the high-voltage system includes devices related to the high-voltage part such as a high-voltage battery, a motor, a compressor, an OBC on-board charger, and a high-voltage control box (including a high-voltage relay).

[0080] The chassis system includes a chassis controller that realizes the anti-theft function. During the start-up process of the fuel cell system, the central controller needs to pass the anti-theft authentication.

[0081] The start-up process of the hydrogen-electric system mainly includes two parts: high-voltage power supply on the vehicle and start-up of 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.

[0082] In step 101, before applying high-voltage power to the vehicle, detect the operating state of the vehicle to perform accurate work before applying high-voltage power.

[0083] As an example, in step 1011, after the vehicle is powered on, the central controller is awakened. The awakened central controller performs a self-check to detect whether there are any faults in itself. If the self-check of the central controller passes, step 1012 is executed. If the self-check of the central controller fails, then control the high-voltage system and the fuel cell system to cut off the low-voltage power supply and prohibit starting.

[0084] 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 central controller through the gateway, and the central controller is woken up. After the central controller is woken up, it performs a self-check. After the self-check is completed, if the self-check passes, it means it can work normally, and then the high voltage is applied later.

[0085] In some embodiments, while the central controller performs a self-check, anti-theft authentication is carried out. If the central controller passes the anti-theft authentication and the self-check, the central controller continues to execute step 1012.

[0086] Step 1012, after the central controller passes the self-check, it reads the historical fault information stored in its internal memory and analyzes whether there are high-level faults in the historical fault information. If no high-level faults are found, it means that the vehicle's system is in a normal standby operation state, including the high-voltage system, the chassis system, and the fuel cell system, and step 1013 is continued. If high-level faults are found to exist, the high-voltage system and the fuel cell system are controlled to cut off the low voltage, and starting is prohibited.

[0087] The high-level faults described in this article refer to faults that have a very bad impact on the operation after the vehicle starts (such as difficult to stop, cut off power, etc.). For example, vehicle system short circuit, motor fault, power battery pack thermal runaway, etc. High-level faults can be set before the hydrogen-electric system starts. When analyzing the historical fault information, it is compared with the pre-set high-level fault library to determine whether there are high-level faults in the historical fault information.

[0088] The historical fault information described in this article refers to the fault information recorded after the vehicle systems are detected after the vehicle is powered on.

[0089] In some embodiments, the memory of the central controller stores historical fault information of multiple detections of the vehicle systems. After the central controller passes the self-check, the latest historical fault information is obtained from the memory to reflect the most accurate state information of the vehicle.

[0090] Step 1013, if the central controller determines that the hydrogen-electric vehicle is in a normal standby operation state, it cuts off the low voltage of the high-voltage system, the peripherals of the fuel cell system, and the chassis system, and continues to execute step 1014.

[0091] In some embodiments, the high-voltage system, the fuel cell system, and the chassis system also include low-voltage relays. The low-voltage relays are connected between other peripherals in their respective systems and the low-voltage battery. The central controller sends a low-voltage signal to the low-voltage relay. When the low-voltage signal is triggered, the contacts of the low-voltage relay close, allowing the electrical equipment on the current path to operate.

[0092] The low-voltage signals described in this article are signals such as 12V and 24V.

[0093] In some other embodiments, during the process of applying low-voltage power, the central 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 relays of the high-voltage system, the fuel cell controller of the fuel cell system, the motor controller, the battery controller, and the pre-charge relay.

[0094] While closing the CPSR, the central controller sends a low-voltage power application instruction allowing the application of low-voltage power to each peripheral such as the high-voltage system, the fuel cell controller, and the chassis system, so as to control the high-voltage system, the fuel cell controller, and the chassis system to output low-voltage power to the devices within their respective systems after receiving the low-voltage power application instruction, thereby achieving the application of low-voltage power to the high-voltage system, the fuel cell system, and the chassis system.

[0095] Step 1014: The central controller detects the operating state of the chassis system and the operating states of the peripherals of the high-voltage system and the fuel cell system, and respectively obtains the operating state data of each device within the high-voltage system, the fuel cell system, and the chassis system.

[0096] The detection described in this article refers to the detection of the operating states of the peripherals inside and outside the high-voltage system, the fuel cell system, and the chassis system, to determine whether the high-voltage system, the fuel cell system, and the chassis system are in a normal operating state.

[0097] Step 1015: The central controller makes a judgment based on the operating state data, judges the real-time fault information of each device, and obtains a first detection result.

[0098] If it is determined based on the operating state data that there are high-level faults that cause the high-voltage system and the fuel cell system not to operate, then a first detection result indicating that the devices within the high-voltage system and the fuel cell system are in an abnormal operating state is obtained, and then the high-voltage system and the fuel cell system are controlled to cut off the low-voltage power and startup is prohibited. It should be noted that the chassis system does not need to be powered by high voltage, so applying low-voltage power to the chassis system is used to detect the operating states of the peripherals inside and outside the chassis system and determine whether it is in a normal operating state.

[0099] If there are no high-level faults that cause the high-voltage system and the fuel cell system not to operate, then a first detection result indicating that the devices within the high-voltage system and the fuel cell system are in a normal operating state is obtained, and step 102 is continued to be executed.

[0100] 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, cut off power, etc.) on the operation states of the devices after applying low-voltage power to the high-voltage system, the fuel cell system, and the chassis system. For example, short circuit of the whole vehicle system, motor failure, thermal runaway of the power battery pack, hydrogen leakage in the hydrogen storage tank or pipeline, etc.

[0101] In some embodiments, if there are high-level faults that cause the high-voltage system and the fuel cell system to malfunction, the faults of each device are recorded in the historical fault information stored in the central processor, providing basic judgment information for the next power-on of the hydrogen-electric system.

[0102] In step 102, if the first detection result indicates that the devices in the high-voltage system, the fuel cell system, and the chassis system are in a normal operating state, the central controller exchanges data with other domains in the hydrogen-electric vehicle (including the cockpit domain, the autonomous driving domain, and the body domain) to confirm whether all domains of the hydrogen-electric vehicle allow the application of high voltage. If allowed, indicating that the vehicle can be powered by high voltage, high-voltage control is performed.

[0103] In some embodiments, the high-voltage system peripherals of the hydrogen-electric vehicle include a high-voltage relay, which 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.

[0104] The control of the high-voltage relay is to output a high-level signal or a low-level signal from the high-voltage system to the coil of the relay, thereby controlling the opening and closing of the high-voltage relay.

[0105] As an example, the process of controlling the vehicle to apply high voltage is as follows:

[0106] Step 1021, if the first detection result indicates that the high-voltage system, the fuel cell system, and the chassis system are in a normal operating state;

[0107] Step 1022, the central controller obtains the status information of the power domain and the chassis domain; and the status information of other domains;

[0108] Step 1023, if the status information indicates that the hydrogen-electric vehicle is allowed to be powered by high voltage, send a closing instruction to the high-voltage system to close the high-voltage relay.

[0109] Therefore, the central controller sends a closing instruction to the high-voltage system to close the high-voltage relay. After the high-voltage relay receives the closing instruction, the high-voltage system performs the operation of closing the high-voltage relay and sends the real-time status of the high-voltage relay to the central controller in real time to complete the vehicle's high-voltage application. The closing instruction means that the central controller outputs a high-level signal to the high-voltage relay of the high-voltage system to control the high-voltage relay to close.

[0110] In some embodiments, the high-voltage system includes multiple relays and an execution controller connected thereto. The central controller outputs high and low levels to the execution controller, and controls at least one corresponding high-voltage relay in the relays to close through the execution controller.

[0111] When the real-time status of the high-voltage relay indicates that the high-voltage relay is in an unclosed state, the high-voltage system and the fuel cell system are prohibited from starting.

[0112] 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.

[0113] In step 103, when the central controller receives the information indicating that the high-voltage relay is in the closed state, it determines that the high-voltage system starts successfully, and at the same time, detects the operating state of the power battery pack in the high-voltage system to obtain a second detection result. The second detection result is used to determine whether the state of the high-voltage system allows the fuel cell system to start. When it allows, it means that the power battery pack meets the preset start conditions. After both the high-voltage on the vehicle and the start of the fuel cell system are in a ready state to release power at any time, it is considered that the hydrogen-electric system starts successfully. Therefore, the preset start condition can be that the power battery pack is in a state of waiting for charging, that is, the power battery pack has a charging demand.

[0114] It should be noted that the operation of the central controller to obtain the real-time state of the 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 high-voltage on the vehicle and the fuel cell system are in a ready state to release power at any time, so as to control the start of the hydrogen-electric system.

[0115] In some embodiments, the second detection result includes the working state data of the power battery pack, the state of charge of the battery, and the rechargeable power. That is, the central controller obtains the second detection result after detecting the fault state, the state of charge of the battery, and the power allowed to charge the power battery pack in the high-voltage system.

[0116] In step 104, if the information indicating that the high-voltage relay is in the closed state is received, and the second detection result indicates that the power battery pack meets the preset operating conditions, which means the power battery pack is in a state of waiting for charging, the fuel cell system is controlled to start.

[0117] If the central controller determines that the vehicle does not meet any of the requirements that the high-voltage relay is in the closed state and the power battery pack meets the preset operating conditions, the start command of the fuel cell system is not sent, and the fuel cell system is prohibited from starting, or the start process is ended.

[0118] As an example, the process for the central controller to determine whether the power battery pack is in a state of waiting for charging is as follows:

[0119] Step 1041: The central controller obtains the second test result of the power battery pack, analyzes the second test result, and determines whether the power battery pack is in a state to be charged, 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 the power battery pack has a fault state but this fault does not affect the operation of the hydrogen-electric system, it indicates that the power battery pack can be charged, and step 1042 is executed. If the power battery pack has a fault state and this fault causes the hydrogen-electric system to not operate, then the fuel cell system is controlled to be prohibited from starting.

[0120] In this article, the power battery pack has a fault state and this fault causes the hydrogen-electric system to not operate. The corresponding second test results are, for example, the fault of the power battery pack being prohibited from charging, the fault of the insulation of the power battery pack, etc.

[0121] Step 1042: The central controller calculates the State of Charge (SOC) 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.

[0122] 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 indicates that the power battery pack has a charging requirement, and step 1043 is executed. If the battery SOC is not within the charging range of the fuel cell system, it indicates 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 fuel cell system is controlled to be prohibited from starting.

[0123] 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 fuel cell system is controlled to be prohibited from starting.

[0124] Step 1043: The central controller calculates the allowable charging power of the power battery pack, that is, the rechargeable power. The rechargeable power is related to the battery SOC. Based on the standby discharge power of the fuel cell system, the power battery pack is analyzed to determine whether the power battery pack has a charging requirement.

[0125] Under normal circumstances, the fuel cell system still supplies air and hydrogen to the fuel cell stack in the fuel cell system in the standby state (such as when stopping at a traffic light) to maintain the state where the 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 will have a standby discharge power in the standby state, and this standby discharge power is not zero.

[0126] The central 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 201 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, then the central controller controls the fuel cell system to be prohibited from starting.

[0127] Through the above steps, the central controller determines whether the power battery pack is in a state of waiting to be charged according to the second detection result. If so and the high-voltage relay is in the closed state, the central controller controls the fuel cell system to start. After the fuel cell system starts successfully and the high voltage is applied to the whole vehicle, it indicates that the hydrogen-electric system starts, and the start control process of this hydrogen-electric vehicle ends.

[0128] As an example, the process of starting the fuel cell system is as follows:

[0129] Step 201, the central controller collects the ambient temperature value of the fuel cell system in real time;

[0130] 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. Generally, 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 requirements. Therefore, in order to ensure the normal operation of the fuel cell, temperature control is required.

[0131] Step 202, 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.

[0132] The cold start threshold mentioned 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 203.

[0133] 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-electric vehicle can start successfully at a temperature below the cold start threshold and can quickly raise the internal temperature of the fuel cell to the operating temperature that meets the normal operation of the system. Exemplarily, the cold start threshold is -10°C.

[0134] During the cold start of a fuel cell, the water generated by the reaction will freeze inside the fuel cell, causing the fuel cell to fail to start properly or its performance to decline. After cold start, when the fuel starts to work at a low temperature, the heat generated will melt the ice inside the system. If the heat generated 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 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 new 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 203 is executed.

[0135] 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, 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 PTC heater is controlled to heat the coolant, and the coolant enters the fuel cell stack through the water pump to achieve heating of the fuel cell system. After the central controller once again real-time collects that the new ambient temperature value of the fuel cell system reaches the expected temperature value (such as the cold start threshold), the central controller controls the PTC heater and the water pump to stop working.

[0136] 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. The pressure of the air delivered to the fuel cell stack is controlled by controlling the air compressor in the fuel cell system.

[0137] Step 203, control the fuel cell system to perform purging and loading to complete the start of the fuel cell system.

[0138] Specifically, the central controller controls the opening of the purging-related devices in the fuel cell system to perform purging. The central controller controls the opening of the loading-related devices in the fuel cell system to perform loading.

[0139] The purging described in this article refers to hydrogen purging during the redox 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.

[0140] The "loading" described in this article refers to the process in which hydrogen and oxygen in the fuel cell system react to increase the output power.

[0141] As an example, the central controller turns on peripheral devices such as the ejector, hydrogen circulation pump, hydrogen throttle valve, air throttle valve, and air compressor for purging, and monitors the purging status in real time, such as the hydrogen concentration. If the purging is completed, the hydrogen throttle valve and the air throttle valve are closed to stop purging; otherwise, purging continues.

[0142] After the purging is completed, the central controller calculates the working power of the fuel cell system, adjusts the input ratio of the hydrogen throttle valve and the air throttle valve so that the working power meets the vehicle battery charge demand, and turns on other peripheral devices in the fuel cell system that affect the working power of the fuel cell system during this process.

[0143] At the same time, the central 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 fuel cell system has started successfully. At this time, the current state of the vehicle is that the high-voltage system has started successfully and the fuel cell system has started successfully, and it is determined that the hydrogen-electric system of the hydrogen-electric vehicle has started successfully.

[0144] This application provides a start control method, controller, and storage medium for a hydrogen-electric vehicle, which is applied to the central controller. Without damaging the original vehicle architecture, by integrating the chassis domain and the power domain to form a central controller, the central controller is directly connected to peripheral devices to control the high-voltage system to go on high voltage and when the high-voltage relay is in the closed state and the second detection result indicates that the power battery pack meets the preset operating conditions, control the fuel cell system to start, which greatly reduces the development cost of system startup and shortens the development cycle.

[0145] 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.

[0146] As Figure 3 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 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 non-volatile memory 540 stores a start control program for the hydrogen-electric vehicle that can run on the processor 510. When the start control program for the hydrogen-electric vehicle is executed by the processor 510, it can be used to implement the start 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.

[0147] The above describes specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the acts 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 drawings do not necessarily require the particular order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0148] Those skilled in the art will readily conceive of other implementations 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 that follow the general principles of this specification and include the common general knowledge or conventional technical means in this technical field that is not claimed in this specification. The specification and examples are only to be considered exemplary, and the true scope and spirit of this specification are pointed out by the following claims.

[0149] 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.

[0150] 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 central controller applied to the hydrogen-electric vehicle, where the central controller is used to control the power domain and the chassis domain of the hydrogen-electric vehicle. The central controller is bidirectionally communicatively connected to the high-voltage system, the fuel cell system in the power domain, and the chassis system in the chassis domain respectively. The method includes: If the self-check of the central controller passes, control the low-voltage power supply of the high-voltage system, the fuel cell system, and the chassis system, and obtain the first detection result of the operating states of the high-voltage system, the fuel cell system, and the chassis system after obtaining the low-voltage power supply; If the first detection result indicates that the high-voltage system, the fuel cell system, and the chassis system are in normal operating states, send a closing instruction to the high-voltage relay of the high-voltage system; Detect the operating state of the power battery pack in the high-voltage system to obtain a second detection result; If the high-voltage relay is in the closed state and the second detection result indicates that the power battery pack meets the preset operating conditions, control the fuel cell system to start; 2. The starting control method of the hydrogen electric vehicle according to claim 1, characterized in that The meeting the preset operating conditions includes that the power battery pack is in a state of waiting to be charged; The step of if the high-voltage relay is in the closed state and the second detection result indicates that the power battery pack meets the preset operating conditions, control the fuel cell system to start, includes: If the high-voltage relay is in the closed state and the second detection result indicates that the power battery pack is in a state of waiting to be charged, control the fuel cell system to start; 3. The starting control method of the hydrogen-electric vehicle according to claim 2, characterized in that: The second detection result includes the working state data of the power battery pack, the state of charge of the battery, and the rechargeable power; The step of if the high-voltage relay is in the closed state and the second detection result indicates that the power battery pack is in a state of waiting to be charged, control the fuel cell system to start, includes: If the high-voltage relay is in the closed state, and it is determined according to the working state 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, control the fuel cell system to start; 4. The starting control method of the hydrogen-electric vehicle according to claim 1, characterized in that, The step of controlling the fuel cell system to start, includes: Control the devices related to the purge operation in the fuel cell system to be turned on. In response to the purge operation, the devices related to the purge operation include a hydrogen throttle valve and an air throttle valve; Real-time monitor the purge state corresponding to the purge operation; If the purge is completed, control the hydrogen and air throttle valves to close; Obtain the working power of the fuel cell system; Adjust the input ratio of the hydrogen throttle valve and the air throttle valve so that the working power meets the demand of the state of charge of the vehicle battery; Control the DC-DC converter in the fuel cell system to start and perform loading; Obtain the loading data; If the loading data reaches the preset value, determine that the fuel cell system has completed starting; 5. The starting control method of the hydrogen-electric vehicle according to claim 4, wherein Before the step of controlling the devices related to the purge operation in the fuel cell system to be turned on, includes: Collect the ambient temperature value of the fuel cell system in real time; If the ambient temperature value is greater than the cold start threshold, control the devices related to the purging operation in the fuel cell system to turn on.

6. The starting control method of the hydrogen electric vehicle according to claim 5, characterized in that, The method further includes: If the ambient temperature value is less than or equal to the cold start threshold, control the heat management related devices in the fuel cell system to start heating the fuel cell system to obtain a new ambient temperature value; If the new ambient temperature value is greater than the cold start threshold, control the heat management related devices to stop; Control the devices related to the purging operation in the fuel cell system to turn on.

7. The starting control method of the hydrogen-electric powered vehicle according to claim 1, characterized in that, The "if the central controller passes the self-check, control the low-voltage power supply of the high-voltage system, the fuel cell system, and the chassis system, and obtain the first detection result of the operating states of the high-voltage system, the fuel cell system, and the chassis system after obtaining the low-voltage power supply" includes: Perform self-check after the central controller is awakened; If the self-check passes, judge whether the hydrogen electric vehicle is in a normal standby operation state according to the historical fault information in the central controller; If the hydrogen electric vehicle is in a normal standby operation state, control the low-voltage relays in the high-voltage system, the fuel cell system, and the chassis system to close respectively, and supply low-voltage power to the high-voltage system, the fuel cell system, and the chassis system; Obtain the operating state data of each device in the high-voltage system, the fuel cell system, and the chassis system respectively; Judge the real-time fault information of the device according to the operating state data to obtain the first detection result.

8. The starting control method of the hydrogen-electric powered vehicle according to claim 1, characterized in that, The method further includes: If the first detection result indicates that the high-voltage system, the fuel cell system, and the chassis system are not in a normal operating state, control the high-voltage system and the fuel cell system to cut off the low-voltage power supply.

9. The starting control method of the hydrogen-electric powered vehicle according to claim 1, wherein The "if the first detection result indicates that the high-voltage system, the fuel cell system, and the chassis system are in a normal operating state, send a closing instruction to the high-voltage relay of the high-voltage system" includes: If the first detection result indicates that the high-voltage system, the fuel cell system, and the chassis system are in a normal operating state; Obtain the status information of the power domain and the chassis domain; If the status information indicates that it is allowed to apply high voltage to the hydrogen electric vehicle, send a closing instruction to the high-voltage relay of the high-voltage system.

10. A central controller for a hydrogen-electric vehicle, characterized in that, The central 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, it implements the steps of the start control method of the hydrogen electric vehicle according to any one of claims 1-9.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a start control program of the hydrogen electric vehicle. When the start control program of the hydrogen electric vehicle is executed, it implements the steps of the start control method of the hydrogen electric vehicle according to any one of claims 1-9.

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