Emergency control method and device for fuel cell vehicle, electronic equipment and vehicle

Abstract

The invention relates to an emergency control method and device for a fuel cell vehicle, electronic equipment and the vehicle. The method comprises the steps that if a power battery of the vehicle breaks down or battery insulation breaks down, whether the vehicle meets an emergency mode starting condition or not is determined; in response to determining that the vehicle meets the emergency mode starting condition, controlling a loop between a driving system of the vehicle and a fuel cell to be closed and a loop between the driving system and a power cell to be disconnected; controlling the voltage of the fuel cell to rise to the minimum working voltage of the driving system, and limiting the current of the fuel cell to the minimum value; and in response to determining that the vehicle completes high-voltage power-on, controlling the fuel cell to generate power according to the whole vehicle power demand, and controlling the driving system to act according to the actual generated power of the fuel cell. Therefore, the fuel cell can independently supply power to the vehicle, so that the vehicle can realize emergency driving when the power cell fails or the insulation of the cell is abnormal, the reliability and the fault-tolerant rate of the vehicle are improved, and the use experience of a user is further improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicles, and in particular, to an emergency control method, device, electronic equipment and vehicle for a fuel cell vehicle. Background Art

[0002] At present, fuel cell vehicles generally adopt the extended-range hybrid technology route (that is, the form that requires the coexistence of power batteries and fuel cell systems), that is, the hydrogen-electric hybrid power strategy is adopted. During the constant speed driving stage, the fuel cell system provides power, and during the acceleration or climbing stage, the fuel cell system and power batteries jointly provide power. If the power battery system fails or the vehicle battery has an insulation problem, the vehicle will stop and the vehicle can only wait for rescue on the spot. Summary of the invention

[0003] The purpose of the present disclosure is to provide an emergency control method, device, electronic equipment and vehicle for a fuel cell vehicle, so that when a power battery fails or the vehicle battery insulation is abnormal, the vehicle can be powered by the fuel cell alone, so that the vehicle can achieve emergency driving.

[0004] In order to achieve the above-mentioned object, the present disclosure provides, in a first aspect, an emergency control method for a fuel cell vehicle, the method comprising: If the vehicle's power battery fails or the battery insulation fails, determining whether the vehicle meets the emergency mode activation conditions; In response to determining that the vehicle meets the emergency mode activation condition, controlling the drive system of the vehicle to close a circuit with the fuel cell and to disconnect a circuit with the power battery; Controlling the voltage of the fuel cell to rise to the minimum operating voltage of the drive system and limiting the current of the fuel cell to a minimum value; In response to determining that the vehicle has completed high-voltage power-up, the fuel cell is controlled to generate electricity according to the power demand of the entire vehicle, and the drive system is controlled to operate according to the actual power generation of the fuel cell.

[0005] Optionally, controlling the fuel cell to generate electricity according to the power demand of the entire vehicle includes: Determine the vehicle power requirement according to the vehicle pedal information, wherein the vehicle speed corresponding to the vehicle power requirement is not greater than the vehicle speed threshold; Determining the required power generation power of the fuel cell according to the required power of the whole vehicle and the power of the accessory system; The fuel cell is controlled to generate electricity according to the required power generation and a closed-loop control method, wherein the closed-loop control method includes a voltage closed-loop control method or a current closed-loop control method.

[0006] Optionally, controlling the operation of the drive system according to the actual power generation of the fuel cell includes: Determine the driving motor power according to the actual power generation and the motor conversion efficiency, wherein the actual power generation is determined according to the required power generation of the fuel cell and the external characteristic coefficient of the fuel cell, and the value of the motor conversion efficiency is less than 1; Determining the driving torque according to the driving motor power and the driving motor speed; The drive system operation is controlled according to the drive torque and the torque change gradient.

[0007] Optionally, the method further comprises: The change gradient of the whole vehicle power is determined according to the change rate of the power generation of the fuel cell, wherein the power generation is the required power generation or the actual power generation.

[0008] Optionally, when controlling the fuel cell to generate electricity according to the power demand of the entire vehicle, the method further includes: If the voltage or current of the fuel cell is not within the corresponding preset range, the power generation of the fuel cell is adjusted according to the deviation state, wherein the power generation is the required power generation or the actual power generation.

[0009] Optionally, adjusting the power generation power of the fuel cell according to the deviation state includes: If the deviation state indicates that the voltage or current is greater than the corresponding preset range, the power generation power of the fuel cell is controlled to decrease; If the deviation state indicates that the voltage or current is less than the corresponding preset range, the power generation power of the fuel cell is controlled to increase.

[0010] Optionally, determining whether the vehicle meets the emergency mode activation condition includes: If the vehicle is powered on again and the switch of the emergency mode of the vehicle is in the on state before the power is powered on again, it is determined that the vehicle meets the emergency mode activation condition.

[0011] A second aspect of the present disclosure provides an emergency control device for a fuel cell vehicle, the device comprising: A first determination module, configured to determine whether the vehicle meets an emergency mode activation condition if a power battery failure or a battery insulation failure occurs in the vehicle; a first control module, configured to control the vehicle's drive system to close a circuit with the fuel cell and disconnect a circuit with the power battery in response to determining that the vehicle meets the emergency mode activation condition; A second control module, used for controlling the voltage of the fuel cell to rise to the minimum operating voltage of the drive system and limiting the current of the fuel cell to a minimum value; The third control module is used to control the fuel cell to generate electricity according to the power demand of the whole vehicle in response to determining that the vehicle has completed high-voltage power-up, and to control the operation of the drive system according to the actual power generation power of the fuel cell.

[0012] Optionally, the third control module includes: A first determination submodule is used to determine the required power of the whole vehicle according to the vehicle pedal information, wherein the vehicle speed corresponding to the required power of the whole vehicle is not greater than the vehicle speed threshold; A second determination submodule is used to determine the required power generation power of the fuel cell according to the required power of the whole vehicle and the power of the accessory system; The first control submodule is used to control the power generation of the fuel cell according to the required power generation power and the closed-loop control method, wherein the closed-loop control method includes a voltage closed-loop control method or a current closed-loop control method.

[0013] Optionally, the third control module includes: a third control submodule, configured to determine the driving motor power according to the actual power generation and the motor conversion efficiency, wherein the actual power generation is determined according to the required power generation of the fuel cell and the external characteristic coefficient of the fuel cell, and the value of the motor conversion efficiency is less than 1; A fourth determination submodule, configured to determine a drive torque according to the drive motor power and the drive motor speed; The second control submodule is used to control the action of the driving system according to the driving torque and the torque change gradient.

[0014] Optionally, the emergency control device of the fuel cell vehicle may further include: The second determination module is used to determine the change gradient of the vehicle power according to the change rate of the power generation power of the fuel cell, wherein the power generation power is the required power generation power or the actual power generation power.

[0015] Optionally, the third control module is also used to adjust the power generation power of the fuel cell according to the deviation state if the voltage or current of the fuel cell is not within the corresponding preset range, wherein the power generation power is the required power generation power or the actual power generation power.

[0016] Optionally, the third control module is used to adjust the power generation power of the fuel cell in the following manner: If the deviation state indicates that the voltage or current is greater than the corresponding preset range, the power generation power of the fuel cell is controlled to decrease; If the deviation state indicates that the voltage or current is less than the corresponding preset range, the power generation power of the fuel cell is controlled to increase.

[0017] Optionally, the first determination module is configured to determine whether the vehicle meets the emergency mode activation condition in the following manner: If the vehicle is powered on again and the switch of the emergency mode of the vehicle is in the on state before the power is powered on again, it is determined that the vehicle meets the emergency mode activation condition.

[0018] A third aspect of the present disclosure provides an electronic device, including: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory to implement the steps of the method provided in the first aspect of the present disclosure.

[0019] A fourth aspect of the present disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method provided in the first aspect of the present disclosure.

[0020] A fifth aspect of the present disclosure provides a vehicle, comprising the device provided by the second aspect of the present disclosure, or the electronic device provided by the third aspect of the present disclosure.

[0021] In the above technical solution, if the vehicle's power battery fails or the battery insulation fails, it is determined whether the vehicle meets the emergency mode start-up conditions; in response to determining that the vehicle meets the emergency mode start-up conditions, the vehicle's drive system is controlled to close the circuit with the fuel cell and disconnect the circuit with the power battery; the fuel cell voltage is controlled to rise to the minimum operating voltage of the drive system, and the current of the fuel cell is limited to the minimum value; in response to determining that the vehicle has completed high-voltage power-up, the fuel cell is controlled to generate electricity according to the power demand of the whole vehicle, and the drive system is controlled to operate according to the actual power generation of the fuel cell. In this way, the vehicle can be powered independently by the fuel cell, so that the vehicle can achieve emergency driving when the power battery fails or the battery insulation is abnormal, improve the reliability and fault tolerance of the vehicle, and thus improve the user experience.

[0022] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 4 is a flowchart of an emergency control method for a fuel cell vehicle provided by an exemplary embodiment of the present disclosure.

[0024] Figure 2 is a system structure diagram of a fuel cell vehicle provided by an exemplary embodiment of the present disclosure.

[0025] Figure 3 is a block diagram of an emergency control device for a fuel cell vehicle provided by an exemplary embodiment of the present disclosure.

[0026] Figure 4 is a block diagram of an electronic device provided by an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0028] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0029] Figure 1 FIG. 1 is a flow chart of an emergency control method for a fuel cell vehicle provided by an exemplary embodiment of the present disclosure. The method can be applied to a vehicle controller on a vehicle. Figure 1 As shown, the method may include S101 to S104.

[0030] S101: If the vehicle's power battery fails or the battery insulation fails, determine whether the vehicle meets the emergency mode activation conditions.

[0031] For example, the method of determining power battery failure and battery insulation failure in the related art can be used to determine whether the power battery of the vehicle is faulty and whether the vehicle battery insulation is faulty, which will not be described in detail here. The vehicle battery may include a power battery and a fuel cell.

[0032] In one embodiment, whether the vehicle meets the emergency mode activation condition may be determined in the following manner: If the vehicle is powered on again and the emergency mode switch of the vehicle is in the on state before the vehicle is powered on again, it is determined that the vehicle meets the emergency mode activation conditions.

[0033] For example, the emergency mode switch can be set on the vehicle dashboard. The switch can be a rocker switch or a knob switch, which is not limited here. The emergency mode switch can be connected to the vehicle controller through a wiring harness. For another example, the emergency mode switch can also be a virtual switch displayed on a touch screen bound to the vehicle controller. The vehicle controller can determine the mode the driver wants to switch to based on the switch status of the emergency mode.

[0034] In the event of a vehicle power battery failure or battery insulation failure, a prompt message indicating battery abnormality can be generated and displayed in voice or text to remind the driver to turn on the emergency mode switch and control the vehicle system to power on again. If the vehicle is powered on again and the emergency mode switch is on before the vehicle is powered on again, it can be determined that the vehicle meets the emergency mode startup conditions and the vehicle enters the emergency mode after restarting. In this way, the safety of the vehicle when it enters the emergency mode can be ensured.

[0035] S102, in response to determining that the vehicle meets the emergency mode activation condition, controlling the vehicle's drive system to close the circuit between the fuel cell and disconnect the circuit between the drive system and the power battery.

[0036] The system structure of a fuel cell vehicle can be as follows Figure 2 As shown, the fuel cell is connected to the DCDC converter through the main negative contactor and the main positive contactor, the DCDC converter is connected to the drive motor through the motor controller, and the DCDC converter is also connected to the vehicle accessory assembly; the power battery is connected to the motor controller and the vehicle accessory assembly through the power battery contactor; the drive motor controls the vehicle's drive axle action. Vehicle communication can use CAN bus communication (such as Figure 2 As shown by the dotted line in the figure), the vehicle controller can be used as the vehicle control system to perform overall control of components such as fuel cells, DCDC converters, integrated control systems, power batteries, motor controllers, and drive motors on the CAN bus. Among them, the integrated control system can be used to control the switching states of the power battery contactor, the main negative contactor, and the main positive contactor. The vehicle's drive system may include components such as a motor controller, a drive motor, and a drive axle.

[0037] For example, after the vehicle system is powered on again, the vehicle is first powered on at a low voltage, and the controllers of the vehicle controller, battery management system (BMS), fuel cell system, integrated control system, accessory system and other systems are awakened. When the aforementioned controllers are awakened, the vehicle controller can identify the switch state of the emergency mode. For example, if it is determined that the switch of the emergency mode is in the on state, the vehicle controller can control the main negative contactor and the main positive contactor in the integrated control system to close, and the power battery contactor is not closed. At this time, the circuit of the vehicle's drive system and the fuel cell is closed, and the circuit of the drive system and the power battery is disconnected. In this way, even if the power battery fails or the battery insulation is abnormal, the fuel cell can independently power the vehicle, so that the vehicle can be driven in an emergency, so that the vehicle can be safely driven to a safe area for maintenance. The technical solution in the present disclosure can solve the problem that the vehicle cannot be driven when the power battery of a fuel cell vehicle fails or the battery insulation is abnormal under the extended-range hybrid technology route, so that the vehicle has higher reliability and fault tolerance, and improves the user experience.

[0038] S103, controlling the voltage of the fuel cell to rise to the minimum operating voltage of the drive system and limiting the current of the fuel cell to a minimum value.

[0039] For example, when the vehicle's drive system and the fuel cell circuit are closed, the fuel cell can be controlled to start up, so that its voltage rises to the minimum operating voltage of the drive system and its current is limited to the minimum value. In this way, the fuel cell can generate electricity at a smaller power, and the energy output by the fuel cell can be used to control the start-up of the drive system. The excess energy can be consumed by turning on the accessory system to achieve energy conservation.

[0040] S104, in response to determining that the vehicle has completed high-voltage power-up, controlling the fuel cell to generate electricity according to the power demand of the entire vehicle, and controlling the operation of the drive system according to the actual power generation of the fuel cell.

[0041] Among them, vehicle high-voltage power-up usually refers to the process of connecting the high-voltage battery system to the high-voltage electrical system of the vehicle in an electric or hybrid vehicle. High-voltage power-up will transfer the electrical energy in the battery to the drive motor to provide power to drive the vehicle. The "high voltage" here refers to the 12V low-voltage system in traditional cars. The high-voltage system of electric vehicles usually includes key components such as battery packs, motors, and controllers, and its operating voltage is usually several hundred volts (V) or even higher.

[0042] For example, when the vehicle completes high-voltage power-up, the working state of the fuel cell can be controlled according to the power demand of the whole vehicle. For example, the required power generation of the fuel cell can be determined according to the required power of the whole vehicle, and the fuel cell power generation can be controlled according to the required power generation. Furthermore, the actual power generation of the fuel cell can be determined according to the required power generation of the fuel cell. The actual power generation of the fuel cell is the energy that the fuel cell can actually provide to the vehicle, and the energy provided by the fuel cell can be consumed by the drive system and the accessory system to achieve conservation of vehicle energy. The vehicle controller can determine the driving torque of the drive motor according to the actual power generation of the fuel cell, so that the drive motor acts according to the driving torque, so that the vehicle can achieve emergency driving.

[0043] In the above technical solution, if the vehicle's power battery fails or the battery insulation fails, it is determined whether the vehicle meets the emergency mode start-up conditions; in response to determining that the vehicle meets the emergency mode start-up conditions, the vehicle's drive system is controlled to close the circuit with the fuel cell and disconnect the circuit with the power battery; the fuel cell voltage is controlled to rise to the minimum operating voltage of the drive system, and the current of the fuel cell is limited to the minimum value; in response to determining that the vehicle has completed high-voltage power-up, the fuel cell is controlled to generate electricity according to the power demand of the whole vehicle, and the drive system is controlled to operate according to the actual power generation of the fuel cell. In this way, the vehicle can be powered independently by the fuel cell, so that the vehicle can achieve emergency driving when the power battery fails or the battery insulation is abnormal, improve the reliability and fault tolerance of the vehicle, and thus improve the user experience.

[0044] In an optional embodiment, in S104, controlling the fuel cell to generate electricity according to the power demand of the entire vehicle includes: Determine the vehicle power requirement according to the vehicle pedal information, wherein the vehicle speed corresponding to the vehicle power requirement is not greater than the vehicle speed threshold; Determine the required power generation of the fuel cell based on the required power of the vehicle and the power of the accessory system; The fuel cell is controlled to generate electricity according to the required power generation and the closed-loop control method, wherein the closed-loop control method includes a voltage closed-loop control method or a current closed-loop control method.

[0045] For example, the vehicle pedal information may include accelerator pedal opening information, which is used to characterize the amount of torque requested by the driver. Based on the vehicle pedal information, a reference value of the vehicle power requirement can be determined, and the reference value can be corrected according to the reference value and the vehicle speed threshold to obtain the vehicle power requirement for subsequent use. For example, the reference value of the vehicle power requirement can be determined by the method of determining the vehicle power requirement according to the vehicle pedal information in the related art. The vehicle speed corresponding to the current reference value can be determined according to the correspondence between the predetermined vehicle speed and the reference value of the vehicle power requirement. If the vehicle speed is less than or equal to the vehicle speed threshold, the reference value can be determined as the vehicle power requirement; if the vehicle speed is greater than the vehicle speed threshold, the vehicle power requirement corresponding to the vehicle speed threshold can be determined as the vehicle power requirement for determining the required power generation power.

[0046] In this way, during the emergency driving of the vehicle, the speed of the vehicle can be limited by correcting the required power of the vehicle. For example, the speed of the vehicle can be limited to within 20km / h to ensure the safe driving of the vehicle in emergency mode.

[0047] For example, the sum of the vehicle's required power and the accessory system's power can be determined as the required power generation power of the fuel cell, so that the fuel cell can provide the required energy for the drive system and the accessory system at the same time.

[0048] For example, when the required power generation is determined, the control of the power generation of the fuel cell can be realized according to the voltage closed-loop control method or the current closed-loop control method. Among them, the voltage closed-loop control can refer to comparing the actual output voltage with the set voltage value, taking corresponding control measures based on the difference, and adjusting the voltage output through the feedback control system; the current closed-loop control can refer to comparing the actual output current with the set current value, taking corresponding control measures based on the difference, and adjusting the current output through the feedback control system. Taking the current closed-loop control as an example, the voltage can be kept fixed and the current can be controlled to change to control the working state of the fuel cell. For example, if the required power generation of the fuel cell increases compared to the previous moment, the current can be controlled to increase while the voltage remains unchanged. Taking the voltage closed-loop control as an example, the current can be kept fixed and the voltage can be controlled to change to control the working state of the fuel cell. For example, if the required power generation of the fuel cell increases compared to the previous moment, the voltage can be controlled to increase while the current remains unchanged. In this way, the rapid adjustment of the working state of the fuel cell can be achieved.

[0049] In an optional embodiment, in S104, controlling the action of the driving system according to the actual power generation of the fuel cell includes: Determine the driving motor power according to the actual power generation and the motor conversion efficiency, wherein the actual power generation is determined according to the required power generation of the fuel cell and the external characteristic coefficient of the fuel cell, and the value of the motor conversion efficiency is less than 1; Determine the driving torque according to the driving motor power and the driving motor speed; The drive system action is controlled according to the drive torque and torque change gradient.

[0050] For example, the power that can be provided to the drive system can be determined based on the actual power generation and the power of the accessory system; for example, the difference between the actual power generation and the power of the accessory system can be determined as the power that can be provided to the drive system. The product of the power provided to the drive system and the motor conversion efficiency can be determined as the drive motor power. Among them, the motor conversion efficiency is the conversion efficiency between electrical energy and mechanical energy, and this value is less than 1. For example, the motor conversion efficiency corresponding to the current drive motor speed can be determined based on the correspondence between the pre-calibrated drive motor speed and the motor conversion efficiency. In this way, the determined motor conversion efficiency can be adapted to the actual operating state of the drive motor, thereby improving the accuracy of the determined drive motor power. For example, the product of the required power generation of the fuel cell and the external characteristic coefficient of the fuel cell can be determined as the actual power generation of the fuel cell, wherein the external characteristic coefficient can be pre-calibrated based on the external characteristics of the fuel cell.

[0051] For example, the driving torque T can be determined by the following formula:

[0052] in, is the driving motor power, Drive motor speed.

[0053] For example, when determining the size of the driving torque, the torque change gradient can be used as the step size to achieve control of the drive system. The torque change gradient can be determined based on the actual performance of the fuel cell system, and the actual performance of the fuel cell system can include the fuel cell power generation capacity, fuel cell system life, and fuel cell system minimum power generation. For example, the fuel cell power generation capacity, fuel cell system life, and fuel cell system minimum power generation can be input into a pre-trained torque change gradient determination model, and the output of the model is determined as the torque change gradient. The torque change gradient determination model can be trained by machine learning.

[0054] The torque of the drive motor can be controlled according to the drive torque and the torque change gradient. For example, if the actual drive torque is less than the drive torque determined based on the drive motor power and the drive motor speed, the torque change gradient can be used to control the actual drive torque to gradually increase. In this way, the vehicle can be driven based on the drive torque.

[0055] In an optional embodiment, the emergency control method for a fuel cell vehicle provided by the present disclosure may further include: The change gradient of the power of the whole vehicle is determined according to the change rate of the power generated by the fuel cell.

[0056] The power generation is the required power generation or the actual power generation. The change gradient corresponding to the current rate of change of the power generation of the fuel cell can be determined based on the predetermined correspondence between the rate of change of the power generation of the fuel cell and the change gradient of the vehicle power. The rate of change of the power generation of the fuel cell and the change gradient of the vehicle power can be positively correlated.

[0057] According to the rate of change of the fuel cell's power generation, the gradient of the change of the vehicle's power can be determined to adapt to the rate of change of the power generation, thereby improving the balance between the fuel cell's power generation and the power that the vehicle can consume, and reducing the possibility of problems such as overcurrent, undervoltage, and overvoltage caused by the fuel cell's adjustment rate being unable to meet the needs of the vehicle.

[0058] In an optional embodiment, when controlling the fuel cell to generate electricity according to the power demand of the entire vehicle, the emergency control method for the fuel cell vehicle provided by the present disclosure may further include: If the voltage or current of the fuel cell is not within the corresponding preset range, the power generation of the fuel cell is adjusted according to the deviation state.

[0059] In one embodiment, the power generation of the fuel cell can be adjusted according to the deviation state by: If the voltage or current representing the deviation state is greater than the corresponding preset range, the power generation power of the fuel cell is controlled to decrease; If the deviation state represents that the voltage or current is smaller than the corresponding preset range, the power generation power of the fuel cell is controlled to increase.

[0060] Wherein, the power generation is the required power generation or the actual power generation. For example, the corresponding preset range can be preset, for example, the preset range corresponding to the voltage can be set to 450V-600V. If the voltage value of the fuel cell is higher than the range, it can be determined that the power generation of the fuel cell may be too large and there may be safety hazards. To ensure the safe operation of the vehicle, the power generation of the fuel cell can be controlled to decrease; if the voltage value of the fuel cell is lower than the range, it can be determined that the power generation of the fuel cell may be too small. To ensure the normal operation of the vehicle, the power generation of the fuel cell can be controlled to increase. Wherein, the step size of increase and decrease can be preset to a fixed value, or it can be determined based on the difference between the actual voltage and the preset range of voltage. For example, the smaller the difference between the two, the smaller the step size, so that the accuracy of data adjustment can be improved. The process of adjusting the power generation of the fuel cell based on the current and its corresponding preset range is similar to the process of adjusting the power generation of the fuel cell based on the voltage and its corresponding preset range, which will not be repeated here.

[0061] In an optional embodiment, the high-voltage system of the vehicle includes capacitors and / or brake resistors. The capacitors and / or brake resistors in the high-voltage system of the vehicle can be used to achieve voltage balance in the high-voltage circuit to protect the power supply network and inverter of the high-voltage system, further avoiding the occurrence of problems such as overcurrent, undervoltage, and overvoltage caused by the fuel cell regulation rate failing to meet the requirements of the entire vehicle, thereby improving vehicle reliability and ensuring that the vehicle can continue to travel.

[0062] Based on the same inventive concept, the present disclosure also provides an emergency control device for a fuel cell vehicle. Figure 3 FIG. 2 is a block diagram of an emergency control device 200 for a fuel cell vehicle provided by an exemplary embodiment of the present disclosure. Figure 3 The emergency control device 200 of the fuel cell vehicle may include: A first determination module 201 is used to determine whether the vehicle meets the emergency mode activation condition if the power battery of the vehicle fails or the battery insulation fails; A first control module 202, configured to control the vehicle's drive system to close a circuit with the fuel cell and disconnect a circuit with the power battery in response to determining that the vehicle meets the emergency mode activation condition; A second control module 203, used to control the voltage of the fuel cell to rise to the minimum operating voltage of the drive system, and limit the current of the fuel cell to a minimum value; The third control module 204 is used to control the fuel cell to generate electricity according to the power demand of the whole vehicle in response to determining that the vehicle has completed high-voltage power-up, and to control the operation of the drive system according to the actual power generation power of the fuel cell.

[0063] In the above technical solution, if the vehicle's power battery fails or the battery insulation fails, it is determined whether the vehicle meets the emergency mode start-up conditions; in response to determining that the vehicle meets the emergency mode start-up conditions, the vehicle's drive system is controlled to close the circuit with the fuel cell and disconnect the circuit with the power battery; the fuel cell voltage is controlled to rise to the minimum operating voltage of the drive system, and the current of the fuel cell is limited to the minimum value; in response to determining that the vehicle has completed high-voltage power-up, the fuel cell is controlled to generate electricity according to the power demand of the whole vehicle, and the drive system is controlled to operate according to the actual power generation of the fuel cell. In this way, the vehicle can be powered independently by the fuel cell, so that the vehicle can achieve emergency driving when the power battery fails or the battery insulation is abnormal, improve the reliability and fault tolerance of the vehicle, and thus improve the user experience.

[0064] Optionally, the third control module 204 includes: A first determination submodule is used to determine the required power of the whole vehicle according to the vehicle pedal information, wherein the vehicle speed corresponding to the required power of the whole vehicle is not greater than the vehicle speed threshold; A second determination submodule is used to determine the required power generation power of the fuel cell according to the required power of the whole vehicle and the power of the accessory system; The first control submodule is used to control the power generation of the fuel cell according to the required power generation power and the closed-loop control method, wherein the closed-loop control method includes a voltage closed-loop control method or a current closed-loop control method.

[0065] Optionally, the third control module 204 includes: a third control submodule, configured to determine the driving motor power according to the actual power generation and the motor conversion efficiency, wherein the actual power generation is determined according to the required power generation of the fuel cell and the external characteristic coefficient of the fuel cell, and the value of the motor conversion efficiency is less than 1; A fourth determination submodule, configured to determine a drive torque according to the drive motor power and the drive motor speed; The second control submodule is used to control the action of the driving system according to the driving torque and the torque change gradient.

[0066] Optionally, the emergency control device 200 for a fuel cell vehicle may further include: The second determination module is used to determine the change gradient of the vehicle power according to the change rate of the power generation power of the fuel cell, wherein the power generation power is the required power generation power or the actual power generation power.

[0067] Optionally, the third control module 204 is further used to adjust the power generation of the fuel cell according to the deviation state if the voltage or current of the fuel cell is not within the corresponding preset range, wherein the power generation is the required power generation or the actual power generation.

[0068] Optionally, the third control module 204 is used to adjust the power generation of the fuel cell in the following manner: If the deviation state indicates that the voltage or current is greater than the corresponding preset range, the power generation power of the fuel cell is controlled to decrease; If the deviation state indicates that the voltage or current is less than the corresponding preset range, the power generation power of the fuel cell is controlled to increase.

[0069] Optionally, the first determining module 201 is configured to determine whether the vehicle meets the emergency mode activation condition in the following manner: If the vehicle is powered on again and the switch of the emergency mode of the vehicle is in the on state before the power is powered on again, it is determined that the vehicle meets the emergency mode activation condition.

[0070] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0071] Figure 4 is a block diagram of an electronic device provided by an exemplary embodiment of the present disclosure. Figure 4 As shown, the electronic device 700 may include: a processor 701 , a memory 702 . The electronic device 700 may also include one or more of a multimedia component 703 , an input / output (I / O) interface 704 , and a communication component 705 .

[0072] The processor 701 is used to control the overall operation of the electronic device 700 to complete all or part of the steps in the above-mentioned emergency control method for a fuel cell vehicle. The memory 702 is used to store various types of data to support the operation of the electronic device 700, and these data may include, for example, instructions for any application or method used to operate on the electronic device 700, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 702 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 703 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 702 or sent through the communication component 705. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 704 provides an interface between the processor 701 and other interface modules, and the other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 705 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0073] In an exemplary embodiment, the electronic device 700 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned emergency control method for fuel cell vehicles.

[0074] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the emergency control method for a fuel cell vehicle described above are implemented. For example, the computer-readable storage medium may be the memory 702 including the program instructions, and the program instructions may be executed by the processor 701 of the electronic device 700 to complete the emergency control method for a fuel cell vehicle described above.

[0075] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device, and the computer program has a code portion for executing the above-mentioned emergency control method for a fuel cell vehicle when executed by the programmable device.

[0076] In another exemplary embodiment, a vehicle is also provided. The vehicle includes the emergency control device 200 or the electronic device 700 of the fuel cell vehicle provided above.

[0077] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0078] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0079] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. An emergency control method for a fuel cell vehicle, characterized in that: The method comprises: If the vehicle's power battery fails or the battery insulation fails, determining whether the vehicle meets the emergency mode activation conditions; In response to determining that the vehicle meets the emergency mode activation condition, controlling the drive system of the vehicle to close a circuit with the fuel cell and to disconnect a circuit with the power battery; Controlling the voltage of the fuel cell to rise to the minimum operating voltage of the drive system and limiting the current of the fuel cell to a minimum value; In response to determining that the vehicle has completed high-voltage power-up, the fuel cell is controlled to generate electricity according to the power demand of the entire vehicle, and the drive system is controlled to operate according to the actual power generation of the fuel cell.

2. The method according to claim 1, characterized in that The controlling the fuel cell to generate electricity according to the power demand of the whole vehicle comprises: Determine the vehicle power requirement according to the vehicle pedal information, wherein the vehicle speed corresponding to the vehicle power requirement is not greater than the vehicle speed threshold; Determining the required power generation power of the fuel cell according to the required power of the whole vehicle and the power of the accessory system; The fuel cell is controlled to generate electricity according to the required power generation and a closed-loop control method, wherein the closed-loop control method includes a voltage closed-loop control method or a current closed-loop control method.

3. The method according to claim 2, characterized in that The step of controlling the operation of the driving system according to the actual power generation of the fuel cell comprises: Determine the driving motor power according to the actual power generation and the motor conversion efficiency, wherein the actual power generation is determined according to the required power generation of the fuel cell and the external characteristic coefficient of the fuel cell, and the value of the motor conversion efficiency is less than 1; Determining the driving torque according to the driving motor power and the driving motor speed; The drive system operation is controlled according to the drive torque and the torque change gradient.

4. The method according to claim 3, characterized in that The method further comprises: The change gradient of the whole vehicle power is determined according to the change rate of the power generation of the fuel cell, wherein the power generation is the required power generation or the actual power generation.

5. The method according to claim 1, characterized in that When controlling the fuel cell to generate electricity according to the power demand of the whole vehicle, the method further includes: If the voltage or current of the fuel cell is not within the corresponding preset range, the power generation of the fuel cell is adjusted according to the deviation state, wherein the power generation is the required power generation or the actual power generation.

6. The method according to claim 5, characterized in that The step of adjusting the power generation power of the fuel cell according to the deviation state includes: If the deviation state indicates that the voltage or current is greater than the corresponding preset range, the power generation power of the fuel cell is controlled to decrease; If the deviation state indicates that the voltage or current is less than the corresponding preset range, the power generation power of the fuel cell is controlled to increase.

7. The method according to claim 1, characterized in that The determining whether the vehicle meets the emergency mode activation condition includes: If the vehicle is powered on again and the switch of the emergency mode of the vehicle is in the on state before the power is powered on again, it is determined that the vehicle meets the emergency mode activation condition.

8. An emergency control device for a fuel cell vehicle, characterized in that: The device comprises: A first determination module, configured to determine whether the vehicle meets an emergency mode activation condition if a power battery failure or a battery insulation failure occurs in the vehicle; a first control module, configured to control the vehicle's drive system to close a circuit with the fuel cell and disconnect a circuit with the power battery in response to determining that the vehicle meets the emergency mode activation condition; A second control module, used for controlling the voltage of the fuel cell to rise to the minimum operating voltage of the drive system and limiting the current of the fuel cell to a minimum value; The third control module is used to control the fuel cell to generate electricity according to the power demand of the whole vehicle in response to determining that the vehicle has completed high-voltage power-up, and to control the operation of the drive system according to the actual power generation power of the fuel cell.

9. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 7.

10. A vehicle, characterized in that: Comprising the electronic device as claimed in claim 9.

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