A vehicle and fuel cell system cooperative control method and system
By employing a collaborative control method between the vehicle and the fuel cell system, the problem of reduced lifespan caused by prolonged inactivity of fuel cell vehicles has been solved. Through active start-up and power adjustment, the lifespan of the fuel cell system has been extended.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-16
- Publication Date
- 2026-08-04
AI Technical Summary
The lifespan of fuel cell systems is reduced when fuel cell vehicles are not used for extended periods or when they have inappropriate power response. How can we avoid such problems and extend their lifespan?
The vehicle and fuel cell system coordinated control method actively requests to start up and adjusts the vehicle's electrical power to meet the needs of the fuel cell system through the coordinated work of the vehicle controller and the fuel cell system controller, avoiding long-term inactivity, and actively adjusting the vehicle's electrical power during power response to extend the service life of the fuel cell system.
It enables the fuel cell system to start actively under high pressure, avoiding the shortened lifespan caused by long-term disuse, and improves the service life of the fuel cell through the active power response of the whole vehicle system.
Smart Images
Figure CN117565754B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the technical field of fuel cell system control, specifically to a method and system for coordinated control of a vehicle and a fuel cell system. Background Technology
[0002] The statements in this section are merely background information relating to this disclosure and do not necessarily constitute prior art.
[0003] Proton exchange membrane fuel cells are widely used in fuel cell vehicles due to their zero carbon emissions and pollution-free operation. However, due to the high price of hydrogen, the operating costs of fuel cell vehicles are higher compared to traditional diesel vehicles and pure electric vehicles.
[0004] The inventors discovered in their research that fuel cell vehicles often operate on pure electricity, and prolonged periods of inactivity can reduce the lifespan of the fuel cell system. Therefore, preventing this lifespan degradation caused by prolonged inactivity is crucial. Furthermore, even during normal operation, inappropriate power response can also shorten the lifespan of the fuel cell system. Summary of the Invention
[0005] To address the aforementioned issues, this disclosure proposes a collaborative control method and system for a vehicle and a fuel cell system. Based on the fact that the fuel cell system can actively cooperate with the vehicle to intervene according to its own health status, collaborative control between the vehicle system and the fuel cell system is achieved, which can reduce the risk of reduced lifespan due to long-term non-operation after the fuel cell is installed in the vehicle.
[0006] To achieve the above objectives, the present disclosure adopts the following technical solution:
[0007] One or more embodiments provide a method for coordinated control of a vehicle and a fuel cell system, including the following steps:
[0008] The vehicle is under high voltage, and the fuel cell system checks for a start-up command.
[0009] If the fuel cell system meets the conditions for being allowed to start, and a start command for the fuel cell system is found, the fuel cell system will start; otherwise, a forced start request will be sent to the vehicle controller.
[0010] The vehicle controller determines whether the fuel cell system meets the forced start-up conditions, and sends a start-up command to the fuel cell system when the forced start-up conditions are met.
[0011] After the fuel cell system starts up according to the start-up command, it sends an intervention power request to the vehicle controller.
[0012] The vehicle controller adjusts the vehicle's electrical power consumption so that the vehicle's allowable power threshold is greater than the power request from the fuel cell system, and responds to the power request from the fuel cell system.
[0013] One or more embodiments provide a method for coordinated control of a vehicle and a fuel cell system, which can be implemented in the vehicle controller, and includes the following steps:
[0014] The vehicle is in a high-voltage state, and whether to send fuel cell system commands is determined based on the status of the fuel cell system switch button.
[0015] In response to the start-up request sent by the fuel cell system, determine whether the fuel cell system meets the forced start-up conditions and the allowed start-up conditions, and determine whether to send a start-up command based on the determination result;
[0016] In response to the intervention power request sent by the fuel cell system, the vehicle's electrical power is adjusted so that the vehicle's allowable power threshold is greater than the intervention power request of the fuel cell system, and the power demand is sent to the fuel cell system.
[0017] In response to a forced shutdown request sent by the fuel cell system, the forced shutdown request is displayed on the instrument panel, and the driver's response information is identified; based on the driver's response information, it is determined whether to send a shutdown command to the fuel cell system.
[0018] One or more embodiments provide a method for coordinated control of a vehicle and a fuel cell system, which can be implemented in the controller of the fuel cell system, and includes the following steps:
[0019] The vehicle is under high voltage, and the fuel cell system checks for a start-up command.
[0020] If the fuel cell system meets the conditions for being allowed to start, and a start command for the fuel cell system is found, the fuel cell system will start; otherwise, a forced start request will be sent to the vehicle controller.
[0021] In response to the power-on command sent by the vehicle controller, the fuel cell system is powered on.
[0022] When the fuel cell system is powered on, it obtains the power demand of the vehicle controller, or sends a power access request for the fuel cell system to the vehicle controller so that the vehicle controller can send the power demand.
[0023] It outputs electrical energy to the vehicle in response to the power demand of the vehicle controller.
[0024] One or more embodiments provide a vehicle and fuel cell system collaborative control system, including: a vehicle controller and a fuel cell system;
[0025] The vehicle controller is configured to execute the steps in the above-described vehicle-fuel cell system coordinated control method implemented in the vehicle controller;
[0026] The controller of the fuel cell system is configured to execute the steps in the vehicle-fuel cell system coordinated control method implemented in the controller of the fuel cell system described above.
[0027] One or more embodiments provide a fuel cell bus that employs the above-described vehicle and fuel cell system coordinated control system.
[0028] Compared with the prior art, the beneficial effects of this disclosure are as follows:
[0029] This disclosure realizes the coordinated control between the vehicle controller and the fuel cell system. When the vehicle is under high voltage, the fuel cell actively requests to start, which increases the start-up time of the fuel cell and avoids the problem of shortening the life of the fuel cell system due to long-term inactivity. At the same time, in response to the power request from the fuel cell, the vehicle system actively adjusts the vehicle's power consumption, enabling the vehicle to achieve a positive power response and improve the service life of the fuel cell.
[0030] The advantages of this disclosure, as well as its additional advantages, will be described in detail in the following specific embodiments. Attached Figure Description
[0031] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute a limitation thereof.
[0032] Figure 1 This is an overall flowchart of the collaborative control method of Embodiment 1 of this disclosure;
[0033] Figure 2 This is a flowchart illustrating the implementation method of the collaborative control method of Embodiment 1 of this disclosure;
[0034] Figure 3 This is a flowchart of the collaborative control method implemented in the vehicle controller according to Embodiment 2 of this disclosure;
[0035] Figure 4 This is a flowchart of the cooperative control method implemented in the controller of a fuel cell system according to Embodiment 3 of this disclosure. Detailed Implementation
[0036] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.
[0037] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of this disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains.
[0038] It should be noted that the terminology used herein is for descriptive purposes only and is not intended to limit the exemplary embodiments according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. It should be noted that, without conflict, the various embodiments and features within those embodiments can be combined with each other. The embodiments will now be described in detail with reference to the accompanying drawings.
[0039] Example 1
[0040] In one or more of the technical solutions disclosed in the embodiments, such as Figures 1 to 2 As shown, a method for coordinated control of a vehicle and a fuel cell system includes the following steps:
[0041] Step 1: With the vehicle in a high-voltage state, the fuel cell system checks for a start-up command.
[0042] Step 2: If the fuel cell system meets the conditions for being allowed to start, and a start command for the fuel cell system is found, the fuel cell system starts; otherwise, a forced start request is sent to the vehicle controller.
[0043] Step 3: The vehicle controller determines whether the fuel cell system meets the forced start-up conditions. If the forced start-up conditions are met, it sends a start-up command to the fuel cell system.
[0044] Step 4: After the fuel cell system starts up according to the start-up command, it sends an intervention power request to the vehicle controller.
[0045] Step 5: The vehicle controller adjusts the vehicle's electrical power consumption so that the vehicle's allowable power threshold is greater than the power request of the fuel cell system, and responds to the power request of the fuel cell system.
[0046] In this embodiment, the vehicle controller and the fuel cell system achieve mutual coordinated control. When the vehicle is under high voltage, the fuel cell actively requests to start, increasing the start-up time of the fuel cell and avoiding the problem of shortened fuel cell system life due to long-term inactivity. At the same time, in response to the power request from the fuel cell, the vehicle system actively adjusts the vehicle's power consumption, enabling the vehicle to achieve a positive power response and improve the service life of the fuel cell.
[0047] In step 1, optionally, the vehicle's battery and motor data can be used to determine whether the vehicle is in a high-voltage state. In this embodiment, turning the vehicle key to the start position indicates that the vehicle is in a high-voltage state.
[0048] When the vehicle is under high voltage, the vehicle controller can send a start-up command to the fuel cell system or not.
[0049] In step 2, specifically, when the vehicle is under high voltage and the fuel system meets the start-up conditions, the fuel cell system starts up when the vehicle controller sends a start-up command to the fuel cell system; when the vehicle is under high voltage but the vehicle controller does not send a start-up command to the fuel cell system, the fuel cell system sends a forced start-up request to the vehicle controller.
[0050] The fuel cell system meets the permitted start-up conditions, which are: the temperature, pressure, fuel gas concentration, state of charge of the power battery, the permitted continuous charging power of the power battery, the vehicle collision signal, and the status of the fuel filler port meet the start-up requirements of the fuel cell system.
[0051] In this embodiment, the fuel cell system can specifically be a hydrogen fuel cell system.
[0052] In a further technical solution, in step 3, after the vehicle controller receives the forced start request sent by the fuel cell system, the vehicle controller determines whether the fuel cell system meets the forced start conditions. If the forced start conditions are met, the vehicle controller sends a start command to the fuel cell system.
[0053] Specifically, the forced start-up conditions are that the following conditions must be met simultaneously: the fuel cell stack meets the start-up conditions, the number of forced start-ups of the fuel cell system is less than a set threshold, and the driver agrees to start the fuel cell.
[0054] In step 3, the process of the vehicle controller responding to the forced power-on request can be specifically described as follows:
[0055] Step 31: The vehicle controller determines whether the fuel cell stack of the fuel cell system meets the start-up conditions;
[0056] Step 32: The vehicle controller determines whether the number of forced start-ups of the fuel cell system meets the set threshold.
[0057] Step 33: The vehicle controller sends a forced fuel cell start-up flag to cause the vehicle instrument panel to display the forced start-up information of the fuel cell;
[0058] Optionally, the vehicle's main instrument panel displays a message indicating that the fuel cell system is forced to start, as a reminder to the driver.
[0059] Step 34: Obtain the driver's response to the forced start of the fuel cell;
[0060] The driver's response information can be the driver's specific driving action. Optionally, the driver's permitted driving response action after giving permission is: the driver sets the hydrogen-electric conversion switch to hybrid mode; when the vehicle receives a forced shutdown command for the fuel cell system and the driver gives permission, the driver's permitted response action to shut down the fuel cell system is: the driver sets the hydrogen-electric conversion switch to pure electric mode.
[0061] Step 35: When the fuel cell stack meets the start-up conditions, the number of forced start-ups of the fuel cell system is less than the set threshold, and the driver agrees to start the fuel cell, the vehicle controller sends a start-up command to the fuel cell system. Otherwise, the vehicle controller does not send a start-up command, and the fuel cell does not start.
[0062] In this embodiment, the fuel cell system is started in two ways: the first is that the vehicle controller actively sends a start-up command; the second is that the vehicle controller does not send a start-up command, and the fuel cell system actively requests a forced start-up process.
[0063] Furthermore, in the first scenario, after the vehicle controller actively sends the start-up command for the fuel system, the fuel cell system queries the start-up command and starts up. The vehicle controller can send power requirements to the fuel cell system according to the vehicle's set power. When the fuel cell system needs to intervene in its own power output, the vehicle can send power requirements to the fuel cell system according to its own power requirements.
[0064] Optionally, the fuel cell system may need to intervene in its own power output when the fuel cell system detects that the current power causes all cell voltages to be too high or all cell voltages to be too low, or a particular cell voltage to be too high or a particular cell voltage to be too low.
[0065] Furthermore, in the second scenario, when the vehicle does not send a start-up command to the fuel cell system, the fuel cell system requests permission from the vehicle to start up. The vehicle can determine whether the fuel cell system meets the start-up conditions, which include: the vehicle's hydrogen system temperature, pressure, hydrogen concentration, power battery state of charge, power battery's allowable continuous charging power, vehicle collision signal, and hydrogen refueling port status meeting the start-up requirements of the fuel cell system.
[0066] In this embodiment, the number of forced start-ups of the fuel cell system can be set to 1. When a high-voltage action is detected during each power-on cycle of the vehicle, the number of forced start-ups of the fuel cell system is set to 0.
[0067] In step 5, the vehicle controller adjusts the vehicle's electrical power consumption. Optionally, it can control the forced start of some high-voltage components such as air conditioning, defrosting, and heating to absorb the discharge power of the fuel cell system.
[0068] Specifically, after the fuel cell system is turned on, the vehicle can send power requests to the fuel cell system according to its own power requirements. If the vehicle's conditions cannot meet the power requirements of the fuel cell system, the vehicle can control some high-voltage components such as air conditioning, defrosting, and heating to be forcibly started to absorb the discharge power of the fuel cell system.
[0069] Among them, the vehicle conditions cannot meet the power requirements of the fuel cell system itself. The vehicle conditions refer to: ambient temperature, the continuous charging power allowed by the power battery, and the vehicle's operating status.
[0070] Specifically, the vehicle controller determines the maximum allowable power threshold of the fuel cell based on factors such as ambient temperature, the continuous charging power of the power battery, and the vehicle's operating status. If the power threshold is greater than the power request of the fuel cell system, the vehicle controller responds to the power request of the fuel cell system. If the power threshold is less than the power request of the fuel cell system, the vehicle controller controls high-voltage components such as air conditioning, defrosting, and heating to be forcibly turned on until the power threshold is greater than the power request of the fuel cell system.
[0071] A further technical solution involves the fuel cell system sending a forced shutdown command to the vehicle controller when the fuel cell is powered on. After the vehicle controller receives the forced shutdown command from the fuel cell system and the driver gives permission, the vehicle sends a shutdown command to the fuel cell system.
[0072] After receiving a forced shutdown command from the fuel cell system, the vehicle controller's response process includes the following steps:
[0073] Step 61: After receiving the forced shutdown command sent by the fuel cell system, the vehicle controller sends a forced fuel cell system shutdown flag to the vehicle instrument panel so that the main page of the vehicle instrument panel displays the words "forced fuel cell system shutdown".
[0074] Step 62: Obtain the driver's response to the forced start of the fuel cell;
[0075] Step 63: When the driver agrees to the fuel cell system shutting down or starting up, the vehicle controller sends a shutdown command to the fuel cell system; otherwise, the vehicle continues to respond to the fuel cell system's power intervention request.
[0076] Furthermore, it also includes a method for the vehicle controller to record the number of forced start-ups of the fuel cell system. Specifically: after a forced shutdown of the fuel cell system, the forced start-up count is set to 1; when a high-voltage action is detected during each power-on cycle of the vehicle, the forced start-up count is set to 0; after a forced start-up and shutdown of the fuel cell system, the forced start-up count is set to 1.
[0077] In this embodiment, in the first case of the fuel cell system start-up mode: the vehicle is in a high-voltage state. When the vehicle sends a start-up command to the fuel cell system, the vehicle sends a power demand to the fuel cell system according to its own set power. When the fuel cell system needs to intervene in its own power output, the vehicle can send a power demand to the fuel cell system according to the power requirements of the fuel cell system itself.
[0078] In the second scenario of fuel cell system startup: When the vehicle is in a high-voltage state and the vehicle has not sent a startup command to the fuel cell system, the fuel cell system can request the vehicle to allow it to start up forcibly after detecting a fault that does not affect its startup operation. When the vehicle determines that the startup conditions are met and the driver gives permission, the vehicle sends a startup command to the fuel cell system and sends a power demand to the fuel cell system according to the power requirements of the fuel cell system. When the vehicle receives a forced shutdown command from the fuel cell system and the driver gives permission, the vehicle sends a shutdown command to the fuel cell system.
[0079] The above-mentioned coordinated control process is illustrated below with a specific example, as follows: Figure 2 As shown.
[0080] (1) The fuel cell system detection system status determines the requirements for the whole vehicle;
[0081] The key's electrical signal consists of three signals: OFF, ON, and Start. When the key is in the ON position, the vehicle controller, fuel cell system controller, and integrated power supply are awakened and can send and receive messages normally. The vehicle controller, fuel cell system controller, and integrated power supply can interact via a CAN network architecture. When the key is turned to the Start position, high voltage is applied to the vehicle, the instrument panel displays "ready," and the number of forced start-ups of the fuel cell system is set to 0.
[0082] When the vehicle is under high voltage, turning on the fuel cell system switch sends a start-up command to the fuel cell system, and the fuel cell system is in operation. The fuel cell system detects its own cell voltage status and sends an intervention power request to the vehicle. If the vehicle is under high voltage but the vehicle controller does not send a start-up command to the fuel cell system, the fuel cell system detects its own cell voltage status and sends a forced start-up command and intervention power request to the vehicle.
[0083] (2) The vehicle controller receives the requirements of the fuel cell system and determines the response status;
[0084] When the fuel cell system is in operation, after receiving a power intervention request from the fuel cell system, the vehicle controller determines the maximum allowable power threshold for the fuel cell based on factors such as ambient temperature, the battery's continuous charging power, and the vehicle's operating status. If the power threshold is greater than the fuel cell system's power intervention request, the vehicle controller responds to the request. If the power threshold is less than the request, the vehicle controller forcibly activates high-voltage components such as the air conditioning, defrosting, and heating systems until the power threshold exceeds the request.
[0085] When the fuel cell system is in standby mode, upon receiving a forced start command from the fuel cell system, the vehicle controller checks the vehicle's hydrogen system temperature, pressure, hydrogen concentration, battery state of charge, battery's allowable continuous charging power, vehicle collision signals, and hydrogen refueling port status. If the conditions for allowing the fuel cell stack to start are met, the vehicle controller sends a forced fuel cell system start flag to the instrument cluster, displaying "Forced Fuel Cell System Start" on the main screen. The vehicle controller sends this flag once per power cycle, and the number of times is recorded by the vehicle. If the fuel cell system has already been forcibly started once in the current power cycle, the vehicle controller will no longer respond to forced start commands. Once the instrument cluster displays "Forced Fuel Cell System Start," the driver decides whether to switch the hydrogen-electric conversion switch to hybrid mode. If the switch is in hybrid mode, the vehicle sends a start command to the fuel cell system.
[0086] The vehicle responds to the power request from the fuel cell system. After receiving the power request, the vehicle determines the maximum allowable power threshold of the fuel cell based on factors such as ambient temperature, the continuous charging power allowed by the power battery, and the vehicle's operating status. If the power threshold is greater than the power request from the fuel cell system, the vehicle responds to the power request. If the power threshold is less than the power request from the fuel cell system, the vehicle controls the contactors of high-voltage components such as air conditioning / defrosting / heating in the integrated power supply to close and forcibly turn on the high-voltage components until the power threshold is greater than the power request from the fuel cell system.
[0087] When the vehicle detects a forced shutdown command for the fuel cell system, it sends a forced shutdown flag to the instrument panel, which displays the words "Forced Fuel Cell System Shutdown" on the main screen. The driver then decides whether to switch the hydrogen-electric conversion switch to pure electric mode. When the hydrogen-electric conversion switch is in pure electric mode, the vehicle sends a shutdown command to the fuel cell system, and the number of forced startups for the fuel cell system is set to 1.
[0088] The system control method provided in this embodiment enables the fuel cell system to actively cooperate with the vehicle controller to intervene based on its current health status, thereby eliminating the risk of reduced lifespan due to long-term non-operation after fuel cell installation.
[0089] Example 2
[0090] Based on Embodiment 1, this embodiment provides a method for coordinated control of a vehicle and a fuel cell system, which can be implemented in the vehicle controller, such as... Figure 3 As shown, it includes the following steps:
[0091] Step 1: With the vehicle in a high-voltage state, determine whether to send a fuel cell system command based on the status of the fuel cell system switch button;
[0092] Step 2: In response to the start-up request sent by the fuel cell system, determine whether the fuel cell system meets the forced start-up conditions and the allowed start-up conditions, and determine whether to send a start-up command based on the determination result;
[0093] Step 3: In response to the intervention power request sent by the fuel cell system, adjust the vehicle's electrical power consumption so that the vehicle's allowable power threshold is greater than the intervention power request of the fuel cell system, and send the power demand to the fuel cell system.
[0094] Step 4: In response to the forced shutdown request sent by the fuel cell system, display the forced shutdown request on the instrument panel and identify the driver's response information; determine whether to send a shutdown command to the fuel cell system based on the driver's response information;
[0095] Furthermore, the conditions for permissible startup include: the temperature, pressure, hydrogen concentration, state of charge of the power battery, allowable continuous charging power of the power battery, vehicle collision signal, and hydrogen refueling port status meeting the startup requirements of the fuel cell system.
[0096] Optionally, the forced start-up condition is that the following conditions are met simultaneously: the fuel cell stack meets the start-up conditions, the number of forced start-ups of the fuel cell system is less than a set threshold, and the driver agrees to start the fuel cell.
[0097] The process by which the vehicle controller responds to a forced power-on request can be summarized as follows:
[0098] Step 21: The vehicle controller determines whether the fuel cell stack of the fuel cell system meets the start-up conditions;
[0099] Step 22: The vehicle controller determines whether the number of forced start-ups of the fuel cell system meets the set threshold.
[0100] Step 23: The vehicle controller sends a forced fuel cell start-up flag to cause the vehicle instrument panel to display the forced start-up information of the fuel cell;
[0101] Optionally, the vehicle's main instrument panel displays a message indicating that the fuel cell system is forced to start, serving as a reminder to the driver.
[0102] Step 24: Obtain the driver's response to the forced start of the fuel cell;
[0103] The driver's response information can be the driver's specific driving action. Optionally, the driver's permitted driving response action after giving permission is: the driver sets the hydrogen-electric conversion switch to hybrid mode; when the vehicle receives a forced shutdown command for the fuel cell system and the driver gives permission, the driver's permitted response action to shut down the fuel cell system is: the driver sets the hydrogen-electric conversion switch to pure electric mode.
[0104] Step 25: When the fuel cell stack meets the start-up conditions, the number of forced start-ups of the fuel cell system is less than the set threshold, and the driver agrees to start the fuel cell, the vehicle controller sends a start-up command to the fuel cell system. Otherwise, the vehicle controller does not send a start-up command, and the fuel cell does not start.
[0105] In step 3, the vehicle controller adjusts the vehicle's electrical power consumption. Optionally, it can control the forced start of some high-voltage components such as air conditioning, defrosting, and heating to absorb the discharge power of the fuel cell system.
[0106] Specifically, after the fuel cell system is turned on, the vehicle can send power requests to the fuel cell system according to its own power requirements. If the vehicle's conditions cannot meet the power requirements of the fuel cell system, the vehicle can control some high-voltage components such as air conditioning, defrosting, and heating to be forcibly started to absorb the discharge power of the fuel cell system.
[0107] The vehicle conditions cannot meet the power requirements of the fuel cell system itself. Vehicle conditions refer to: ambient temperature, the continuous charging power allowed by the power battery, and the vehicle's operating status.
[0108] Specifically, the vehicle controller determines the maximum allowable power threshold of the fuel cell based on factors such as ambient temperature, the continuous charging power of the power battery, and the vehicle's operating status. If the power threshold is greater than the power request of the fuel cell system, the vehicle controller responds to the power request of the fuel cell system. If the power threshold is less than the power request of the fuel cell system, the vehicle controller controls high-voltage components such as air conditioning, defrosting, and heating to be forcibly turned on until the power threshold is greater than the power request of the fuel cell system.
[0109] After the fuel cell system is powered on, the vehicle controller can send power demand to the fuel cell system according to the vehicle's set power. When the fuel cell system needs to intervene in its own power output, the vehicle can send power demand to the fuel cell system according to its own power requirements.
[0110] Optionally, the fuel cell system may need to intervene in its own power output when the fuel cell system detects that the current power causes all cell voltages to be too high or all cell voltages to be too low, or a particular cell voltage to be too high or a particular cell voltage to be too low.
[0111] Step 4, the process by which the vehicle controller responds to a forced shutdown command from the fuel cell system, includes the following steps:
[0112] Step 41: After receiving the forced shutdown command sent by the fuel cell system, the vehicle controller sends a forced fuel cell system shutdown flag to the vehicle instrument panel so that the main page of the vehicle instrument panel displays the words "forced fuel cell system shutdown".
[0113] Step 42: Obtain the driver's response to the forced start of the fuel cell;
[0114] Step 43: When the driver agrees to power off or on the fuel cell system, the vehicle controller sends a power off command to the fuel cell system; otherwise, the vehicle continues to respond to the power intervention request from the fuel cell system.
[0115] Example 3
[0116] Based on Example 1, this embodiment provides a method for coordinated control of a vehicle and a fuel cell system, which can be implemented in the controller of the fuel cell system, such as... Figure 4 As shown, it includes the following steps:
[0117] Step 1: With the vehicle in a high-voltage state, the fuel cell system checks for a start-up command.
[0118] Step 2: If the fuel cell system meets the conditions for being allowed to start, and a start command for the fuel cell system is found, the fuel cell system starts; otherwise, a forced start request is sent to the vehicle controller.
[0119] Step 3: In response to the power-on command sent by the vehicle controller, control the fuel cell system to start.
[0120] Step 4: With the fuel cell system powered on, obtain the power requirements of the vehicle controller, or send a power access request for the fuel cell system to the vehicle controller so that the vehicle controller can send the power requirements.
[0121] Step 5: Output electrical energy to the vehicle in response to the power demand of the vehicle controller.
[0122] The fuel cell system meets the permissible start-up conditions, which are: the temperature, pressure, fuel gas concentration, state of charge of the power battery, permissible continuous charging power of the power battery, vehicle collision signal, and status of the fuel filler port meet the start-up requirements of the fuel cell system.
[0123] Example 4
[0124] Based on Embodiments 2 and 3, this embodiment provides a vehicle and fuel cell system collaborative control system, including: a vehicle controller and a fuel cell system;
[0125] The vehicle controller is configured to perform the steps in the coordinated control method for a vehicle and fuel cell system described in Embodiment 2;
[0126] The controller of the fuel cell system is configured to perform the steps in the coordinated control method of a vehicle and fuel cell system described in Example 3.
[0127] Example 5
[0128] Based on Example 4, this example provides a fuel cell bus that uses a vehicle-fuel cell system coordinated control system as described in Example 4.
[0129] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.
[0130] While the specific embodiments of this disclosure have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of this disclosure. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of this disclosure are still within the scope of protection of this disclosure.
Claims
1. A method of integrated vehicle and fuel cell system cooperative control, characterized by, Includes the following steps: The vehicle is under high voltage, and the fuel cell system checks for a start-up command. When the fuel cell system meets the conditions for being allowed to start, and a start command for the fuel cell system is received, the fuel cell system starts up. Otherwise, send a forced power-on request to the vehicle controller; The vehicle controller determines whether the fuel cell system meets the forced start-up conditions, and sends a start-up command to the fuel cell system when the forced start-up conditions are met. After the fuel cell system starts up according to the start-up command, it sends an intervention power request to the vehicle controller. The vehicle controller adjusts the vehicle's electrical power consumption so that the vehicle's allowable power threshold is greater than the power request of the fuel cell system, and responds to the power request of the fuel cell system. After receiving a forced start request from the fuel cell system, the vehicle controller's response to the forced start request includes the following steps: The vehicle controller determines whether the fuel cell stack of the fuel cell system meets the start-up conditions. The vehicle controller determines whether the number of forced start-ups of the fuel cell system meets the set threshold. The vehicle controller sends a forced fuel cell start flag to cause the vehicle instrument panel to display a forced fuel cell start information; Obtain the driver's response to the forced start-up of the fuel cell; When the fuel cell stack meets the start-up conditions, the number of forced start-ups of the fuel cell system is less than the set threshold, and the driver agrees to start the fuel cell, the vehicle controller sends a start-up command to the fuel cell system; otherwise, the vehicle controller does not send a start-up command, and the fuel cell does not start. The vehicle controller determines the maximum allowable power threshold of the fuel cell based on the ambient temperature, the continuous charging power of the power battery, and the vehicle's operating status. If the power threshold is greater than the power request of the fuel cell system, the vehicle controller responds to the power request of the fuel cell system. If the power threshold is less than the power request of the fuel cell system, the vehicle controller controls the high-voltage components to be forcibly opened until the power threshold is greater than the power request of the fuel cell system.
2. The method of claim 1, wherein the vehicle and fuel cell system are controlled in cooperation with each other. The conditions for permissible startup are: the temperature, pressure, fuel gas concentration, state of charge of the power battery, allowable continuous charging power of the power battery, vehicle collision signal, and fuel filler port status of the fuel cell system meet the startup requirements of the fuel cell system.
3. The method of claim 1, wherein the vehicle and fuel cell system cooperative control method is characterized by, The vehicle controller sends power demand to the fuel cell system according to the vehicle's set power. When the fuel cell system needs to intervene in its own power output, the vehicle can send power demand to the fuel cell system according to the fuel cell system's own power requirements. The condition under which a fuel cell system needs to intervene in its own power output is: the fuel cell system detects that the current power causes all cell voltages to be too high or all cell voltages to be too low, or the voltage of a particular cell to be too high or a particular cell voltage to be too low.
4. The method of claim 1, wherein the vehicle and fuel cell system cooperative control method is characterized by, After receiving a forced shutdown command from the fuel cell system, the vehicle controller's response process includes the following steps: After receiving the forced shutdown command from the fuel cell system, the vehicle controller sends a forced fuel cell system shutdown flag to the vehicle instrument panel so that the main screen of the vehicle instrument panel displays the words "forced fuel cell system shutdown". Obtain the driver's response to the forced start-up of the fuel cell; When the driver agrees to power off or on the fuel cell system, the vehicle controller sends a power off command to the fuel cell system; otherwise, the vehicle continues to respond to the fuel cell system's power intervention request.
5. A method of integrated vehicle and fuel cell system cooperative control, characterized by, Includes the following steps: The vehicle is in a high-voltage state, and whether to send fuel cell system commands is determined based on the status of the fuel cell system switch button. In response to the start-up request sent by the fuel cell system, determine whether the fuel cell system meets the forced start-up conditions and the allowed start-up conditions, and determine whether to send a start-up command based on the determination result; In response to the intervention power request sent by the fuel cell system, the vehicle's electrical power is adjusted so that the vehicle's allowable power threshold is greater than the intervention power request of the fuel cell system, and the power demand is sent to the fuel cell system. In response to a forced shutdown request sent by the fuel cell system, the forced shutdown request is displayed on the instrument panel, and the driver's response information is identified; based on the driver's response information, it is determined whether to send a shutdown command to the fuel cell system. After receiving a forced start request from the fuel cell system, the vehicle controller's response to the forced start request includes the following steps: The vehicle controller determines whether the fuel cell stack of the fuel cell system meets the start-up conditions. The vehicle controller determines whether the number of forced start-ups of the fuel cell system meets the set threshold. The vehicle controller sends a forced fuel cell start flag to cause the vehicle instrument panel to display a forced fuel cell start information; Obtain the driver's response to the forced start-up of the fuel cell; When the fuel cell stack meets the start-up conditions, the number of forced start-ups of the fuel cell system is less than the set threshold, and the driver agrees to start the fuel cell, the vehicle controller sends a start-up command to the fuel cell system; otherwise, the vehicle controller does not send a start-up command, and the fuel cell does not start. The vehicle controller determines the maximum allowable power threshold of the fuel cell based on the ambient temperature, the continuous charging power of the power battery, and the vehicle's operating status. If the power threshold is greater than the power request of the fuel cell system, the vehicle controller responds to the power request of the fuel cell system. If the power threshold is less than the power request of the fuel cell system, the vehicle controller controls the high-voltage components to be forcibly opened until the power threshold is greater than the power request of the fuel cell system.
6. A method of integrated vehicle and fuel cell system cooperative control, characterized by, Includes the following steps: The vehicle is under high voltage, and the fuel cell system checks for a start-up command. When the fuel cell system meets the conditions for being allowed to start, and a start command for the fuel cell system is received, the fuel cell system starts up. Otherwise, send a forced power-on request to the vehicle controller; In response to the power-on command sent by the vehicle controller, the fuel cell system is powered on. When the fuel cell system is powered on, it sends a request for the fuel cell system to engage power to the vehicle controller, so that the vehicle controller can send the power demand. It outputs electrical energy to the vehicle in response to the power demand of the vehicle controller; The vehicle controller adjusts the vehicle's electrical power consumption so that the vehicle's allowable power threshold is greater than the power request of the fuel cell system, and responds to the power request of the fuel cell system. After receiving a forced start request from the fuel cell system, the vehicle controller's response to the forced start request includes the following steps: The vehicle controller determines whether the fuel cell stack of the fuel cell system meets the start-up conditions. The vehicle controller determines whether the number of forced start-ups of the fuel cell system meets the set threshold. The vehicle controller sends a forced fuel cell start flag to cause the vehicle instrument panel to display a forced fuel cell start information; Obtain the driver's response to the forced start-up of the fuel cell; When the fuel cell stack meets the start-up conditions, the number of forced start-ups of the fuel cell system is less than the set threshold, and the driver agrees to start the fuel cell, the vehicle controller sends a start-up command to the fuel cell system; otherwise, the vehicle controller does not send a start-up command, and the fuel cell does not start. The vehicle controller determines the maximum allowable power threshold of the fuel cell based on the ambient temperature, the continuous charging power of the power battery, and the vehicle's operating status. If the power threshold is greater than the power request of the fuel cell system, the vehicle controller responds to the power request of the fuel cell system. If the power threshold is less than the power request of the fuel cell system, the vehicle controller controls the high-voltage components to be forcibly opened until the power threshold is greater than the power request of the fuel cell system.
7. A coordinated control system for a vehicle and a fuel cell system, characterized in that, include: Vehicle controller and fuel cell system; The vehicle controller is configured to perform the steps in the coordinated control method for a vehicle and a fuel cell system as described in claim 5; The controller of the fuel cell system is configured to perform the steps in the coordinated control method of a vehicle and a fuel cell system as described in claim 6.
8. A fuel cell bus vehicle characterized by comprising: The vehicle and fuel cell system collaborative control system described in claim 7 is adopted.