Automatic purging system, vehicle, method and storage medium

Abstract

The invention relates to the technical field of fuel cell vehicles, in particular to an automatic purging system, a vehicle, a method and a storage medium, the system comprises an ignition switch, a power supply device and a purging device of a fuel cell system; the switch assembly is used for connecting or disconnecting a power supply circuit between the power supply equipment and the fuel cell system; and the control assembly is used for controlling the switch assembly to be closed according to a power-off signal of the ignition switch or a blow-stack wake-up signal of the fuel cell system, and controlling blowing equipment of the fuel cell system to perform automatic blowing after a power supply circuit between the power supply equipment and the fuel cell system is switched on. Therefore, the problems that in the prior art, when a fuel cell system is shut down for purging, a power switch needs to be manually controlled to close the purging function, the requirement for power supply of a low-voltage storage battery is high, and consequently the situation that the storage battery lacks electricity easily affects vehicle starting are solved.

Description

Technical Field

[0001] The present application relates to the technical field of fuel cell vehicles, and in particular to an automatic purge system, vehicle, method and storage medium. Background Art

[0002] Hydrogen fuel cell buses are required to operate in temperatures as low as -20°C and complete cold starts in ultra-low temperatures. Due to the nature of the exchange membrane stack reaction, hydrogen fuel cell buses produce water during operation. This freezing of water in low temperatures can irreversibly damage the hydrogen fuel's proton exchange membrane and catalyst.

[0003] Therefore, shutdown purge technology is used to purge excess moisture after the hydrogen fuel cell system is shut down, preventing the fuel cell engine from freezing in low-temperature environments while ensuring the next cold start can proceed normally. The automatic purge function requires the 24V low-voltage battery to be powered on, placing higher demands on the battery.

[0004] In the related art, the power is delayed during parking purge. After the purge is completed, the staff needs to manually control the power switch to turn off or keep the low-voltage battery closed. In addition, the automatic purge after parking has high requirements for the power supply of the low-voltage battery. Summary of the Invention

[0005] The present application provides an automatic purge system, vehicle, method and storage medium to solve the problems in the related art of fuel cell system shutdown purge, which requires manual control of the power switch to turn off the purge function, and has high requirements for low-voltage battery power supply, resulting in battery power loss and affecting vehicle starting.

[0006] The first aspect of the present application provides an automatic purge system, comprising: an ignition switch, a power supply device, and a purge device for a fuel cell system; a switch assembly for turning on or off the power supply circuit between the power supply device and the fuel cell system; a control assembly for controlling the closure of the switch assembly according to the power-off signal of the ignition switch or the purge stack wake-up signal of the fuel cell system, and controlling the purge device of the fuel cell system to perform automatic purge after the power supply circuit between the power supply device and the fuel cell system is turned on.

[0007] Optionally, the control component includes a fuel cell system controller, a vehicle controller and a control module, wherein the fuel cell system controller sends the stack blowing wake-up signal to the control module and the vehicle controller, and controls the purge equipment of the fuel cell system to perform automatic purge after the power supply circuit between the power supply equipment and the fuel cell system is connected; the control module and the vehicle controller control the switch component to close according to the power-off signal or the stack blowing wake-up signal to connect the power supply circuit between the power supply equipment and the fuel cell system.

[0008] Optionally, the control module and the vehicle controller are further used to: after controlling the switch component to close according to the power-off signal of the ignition switch, obtain the duration of the switch component being closed, and control the switch component to open after the duration is greater than a preset duration.

[0009] Optionally, the switch assembly includes: a first switch component and a second switch component, wherein the first switch component is arranged between the power supply device and the vehicle controller, and the second switch component is arranged between the vehicle controller and the fuel cell system; the control module is used to control the closing and opening of the first switch component, and the vehicle controller is used to control the closing and opening of the second switch component.

[0010] Optionally, the automatic purge system further includes: a manual power switch, wherein the manual power switch is connected to the power supply device and the first switch component respectively.

[0011] Optionally, the automatic purge system further includes: a power distribution box, wherein an input end of the power distribution box is connected to the first switch component, and an output end of the power distribution box is respectively connected to the second switch component and the vehicle controller.

[0012] A second aspect of the present application provides a vehicle, comprising the automatic purge system as described in the above embodiment.

[0013] A third aspect of the present application provides an automatic purge method, which uses the automatic purge system described in the above embodiment to perform automatic purge, wherein the method includes the following steps: obtaining the power-off signal of the ignition switch or the blow stack wake-up signal of the fuel cell system; controlling the switch component to close according to the power-off signal of the ignition switch or the blow stack wake-up signal of the fuel cell system to conduct the power supply circuit between the power supply device and the fuel cell system; and controlling the purge device of the fuel cell system to perform automatic purge.

[0014] Optionally, after controlling the switch component to close according to the power-off signal of the ignition switch, the method further includes: obtaining the duration of the closure of the switch component; and controlling the switch component to open after the duration is greater than a preset duration.

[0015] A fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the automatic purging method described in the above embodiment.

[0016] Therefore, this application has at least the following beneficial effects:

[0017] This application can achieve the beneficial effects of automatically controlling the purge function of the fuel cell system after shutdown by adding a switch component, reducing manual control of the battery power supply, more efficiently ensuring the utilization rate of the battery power, ensuring the automatic purge function of the fuel cell system under low temperature conditions, reducing battery power consumption, and ensuring the normal start of the vehicle. This solves the technical problems in the related art of fuel cell system shutdown purge, which require manual control of the power switch to turn off the purge function, and has high requirements for low-voltage battery power supply, resulting in battery power loss and affecting vehicle starting.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 A system structure diagram for shutting down and purging a hydrogen fuel system in the related art;

[0021] Figure 2 A diagram showing the composition of an automatic purge system according to one embodiment of the present application;

[0022] Figure 3 A structural diagram of an automatic purge system provided according to another embodiment of the present application;

[0023] Figure 4 A circuit diagram of an automatic purge system according to one embodiment of the present application;

[0024] Figure 5 A process diagram of a fuel cell system shutdown purge according to an embodiment of the present application;

[0025] Figure 6 The present invention provides a flowchart of an automatic purging method according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0027] In related technologies, such as Figure 1 As shown, the system for realizing automatic purge in a fuel cell vehicle (such as a hydrogen fuel cell vehicle) includes: a vehicle controller 1, a fuel cell system 2, a fuel cell system controller 3, a meter 4, a power supply relay 5, a 24V battery 6 and a key switch 7. Figure 1 The control principle of the system for achieving delayed power-off of the hydrogen fuel system purge is as follows: when the driver turns off the key switch 7, the vehicle controller 1 receives the power-off signal and outputs the power-off signal to the instrument 4, the instrument 4 outputs a control signal to the power supply relay 5, the power supply relay 5 closes, and the 24V battery 6 low-voltage electricity is supplied to the fuel cell system controller 3, the fuel cell system controller 3 outputs a signal to the fuel cell system 2, and the fuel cell system 2 starts to perform the power-off purge work; after the power-off purge is completed, the fuel cell system controller 3 feeds back a signal to the vehicle controller 1, the vehicle controller 1 disconnects the control signal to the instrument 4, the power supply relay 5 is disconnected, and the vehicle completes the power-off.

[0028] At present, the fuel system mainly achieves the purge of the fuel cell system through the following two methods: (1) The staff disconnects the manual power switch after the vehicle is purged, and manually closes it when purging is required. However, this method greatly increases the time for the staff to turn on and off the manual power and wait for purging, which consumes manpower; (2) In order to reduce the workload of the staff and meet the purge requirements of the fuel cell vehicle, the manual power switch can be kept closed, but this will place higher requirements on the battery and easily cause the battery to run low.

[0029] The following describes the automatic purge system, vehicle, method and storage medium of the embodiment of the present application with reference to the accompanying drawings. In view of the fact that the prior art mentioned in the above background technology all delays the power off during parking purge, and the personnel manually turn off the power switch after the purge is completed, and the problem of battery power loss is easy to occur, the present application provides an automatic purge device, in which, without increasing the battery capacity, the circuit control is increased to avoid battery power loss and affect the vehicle starting; the switch component is added to reduce the time and waiting time for personnel to manually turn on and off the power. Thus, the problem of fuel cell system shutdown purge in the related art is solved, which requires manual control of the power switch to turn off the purge function, and has high requirements for the power supply of the low-voltage battery, resulting in the problem of battery power loss affecting the vehicle starting.

[0030] Specifically, Figure 2 This is a block diagram of an automatic purge system provided in this application.

[0031] like Figure 2 As shown, the automatic purge device 10 includes: an ignition switch 100 , a power supply device 200 , a purge device 300 for a fuel cell system, a switch assembly 400 and a control assembly 500 .

[0032] Among them, the switch component 400 is used to turn on or off the power supply circuit between the power supply device and the fuel cell system; the control component 500 is used to control the closure of the switch component 400 according to the power-off signal of the ignition switch 100 or the stack blowing wake-up signal of the fuel cell system, and after the power supply circuit between the power supply device 200 and the fuel cell system is turned on, control the purge device 300 of the fuel cell system to perform automatic purge.

[0033] It can be understood that the control component in the automatic purge system of the embodiment of the present application can control the closing of the switch component according to the signal of the ignition switch to conduct the circuit between the power supply device and the fuel cell system, and control the purge equipment of the fuel cell system to perform automatic purge. It can also control the closing of the switch component according to the purge stack wake-up signal of the fuel cell system to conduct the circuit between the power supply device and the fuel cell system, and control the purge equipment of the fuel cell system to perform automatic purge.

[0034] In the embodiment of the present application, the power supply device 200 may be a battery.

[0035] In the embodiments of this application, Figure 3 As shown, the control component 500 includes: a fuel cell system controller 501, a vehicle controller 502 and a control module 503.

[0036] Among them, the fuel cell system controller 501 sends a stack blowing wake-up signal to the control module 503 and the vehicle controller 502, and after the power supply circuit between the power supply equipment 200 and the fuel cell system is connected, controls the fuel cell system's purge equipment 300 to perform automatic purge; the control module 503 and the vehicle controller 502 control the switch assembly 400 to close according to the power-off signal or the stack blowing wake-up signal to connect the power supply circuit between the power supply equipment 200 and the fuel cell system.

[0037] In an embodiment of the present application, the control module 503 and the vehicle controller 502 are further used to: after controlling the switch component to close according to the power-off signal of the ignition switch, obtain the duration of the switch component being closed, and control the switch component to open after the duration is greater than the preset duration.

[0038] The preset duration can be set according to specific circumstances and is not specifically limited thereto. For example, it can be set to 30 minutes or 40 minutes.

[0039] It can be understood that in the embodiment of the present application, after the control module and the vehicle controller control the switch component to close according to the power-off signal of the ignition switch, the switch component is controlled to close after the switch closing time exceeds the preset time to prevent the battery from over-discharging and affecting the vehicle starting.

[0040] In the embodiments of this application, Figure 3 As shown, the switch assembly 400 includes a first switch element 401 and a second switch element 402 .

[0041] Among them, the first switch component (also known as an electromagnetic switch) 401 is arranged between the power supply equipment 200 and the vehicle controller 502, and the second switch component 402 is arranged between the vehicle controller 502 and the fuel cell system; the control module 503 is used to control the closing and opening of the first switch component 401, and the vehicle controller 502 is used to control the closing and opening of the second switch component 402.

[0042] It can be understood that the embodiment of the present application can control the closing of the switch assembly according to the power-off signal of the ignition switch or the stack blowing wake-up signal of the fuel cell control system controller, the control module controls the first switch element, and the vehicle controller controls the second switch element.

[0043] In the embodiments of this application, Figure 3 As shown, the system 10 of the embodiment of the present application further includes: a manual power switch 601 and a distribution box 602.

[0044] Among them, the manual power switch 601 (also known as the gate) is respectively connected to the power supply equipment 200 and the first switch component 401; the input end of the distribution box 602 is connected to the first switch component 401, and the output end of the distribution box 602 is respectively connected to the second switch component 402 and the vehicle controller 502.

[0045] In summary, the automatic purge device of the embodiment of the present application is to add switch components and module control on the basis of the original circuit, so as to ensure that the battery power consumption is minimized in the shutdown state and the vehicle can be started normally in the low temperature state. The structure of each component is as follows: Figure 3 shown.

[0046] Specifically, the embodiments of the present application can realize automatic purging of the fuel cell system in two ways. The fuel cell system controller sends a stack blowing wake-up signal to the control module and the vehicle controller. The control module and the vehicle controller close the switch component according to the power-off signal of the ignition switch or the stack blowing wake-up signal. (1) When the ignition switch is turned off, the automatic purge system performs delayed purge and delayed power-off. The control module and the vehicle controller control the switch component to close according to the power-off signal of the switch, and turn on the power supply circuit between the power supply device and the fuel cell system. After a preset time, the switch component is disconnected to stop purging; (2) After the fuel cell system sends the stack blowing wake-up signal, the automatic purge system performs timed purging. The control module and the vehicle controller control the switch component to close according to the stack blowing wake-up signal of the fuel cell system, and turn on the power supply circuit between the power supply device and the fuel cell system.

[0047] In summary, the embodiment of the present application adds a switch component and a control module connected to the switch component without increasing the battery capacity. By increasing the control of the circuit, it avoids battery depletion and affects the vehicle starting situation. By adding the switch component, it reduces the manual power on and off time and waiting time.

[0048] The following will be Figure 4 The system shown in the figure is used as an example to illustrate the control principle of purge, where Figure 4 As shown, a switch is added after the manual power switch (also called the gate), and the switch assembly is controlled to open and close through the control module. The control principle is as follows:

[0049] 1. Delayed shutdown: Turn off the ignition switch (key), the vehicle controller receives the power-off signal, executes the power-off of the entire vehicle, and sends a signal to the fuel cell system. The fuel cell system automatically performs the stack purge after receiving the shutdown command. After receiving the signal to turn off the ignition switch, the control module stops the first switch (also called electromagnetic switch) from outputting a high level after a preset delay, and the first switch is disconnected after a preset time. After the vehicle key is turned off, the power is turned off after a preset delay, ensuring the realization of the automatic purge function of the fuel cell system;

[0050] 2. Stack purge wake-up: After shutdown, the system automatically starts purge. The fuel cell system controller sends a stack purge wake-up signal to the control module and the vehicle controller. The control module then outputs a high level to the first switch. The first switch closes and supplies power to the power distribution box and the vehicle controller. After power is supplied, the vehicle controller controls the second switch to close according to the stack purge wake-up signal to supply power to the fuel cell system, thus realizing the automatic purge function of the fuel cell system.

[0051] 3. Blowing pile stops: After the system automatically blows the pile, the blowing pile wake-up signal stops, and the control module stops outputting a high level to the first switch, that is, outputs a low level. The vehicle controller outputs a low level to the second switch, the second switch is disconnected, and the battery stops supplying power to the vehicle's electrical components, which can effectively prevent the battery from over-discharging and affecting vehicle starting.

[0052] The following will Figure 4 Based on the system shown, combined Figure 5 The automatic purge process is described with an example. The specific steps are as follows:

[0053] (1) Turn off the ignition switch, the vehicle controller receives the power-off signal and executes the power-off of the vehicle. The control module and the vehicle controller control the switch component to close according to the power-off signal of the ignition switch, delay the high voltage after power-off, perform delayed purge, connect the circuit between the power supply device and the fuel cell system, and control the purge device of the fuel cell system to purge for a preset time, such as 30 minutes. After 30 minutes, the control module and the vehicle controller control the switch component to disconnect and stop outputting a high level to the first switch component, thereby realizing the automatic purge function of the fuel cell system.

[0054] (2) The first scheduled purge is performed about 6 hours after the delayed purge. The fuel cell system controller sends a stack purge wake-up signal to the control module and the vehicle controller. The control module outputs a high level to the first switch according to the stack purge wake-up signal to close the first switch to supply power to the distribution box and the vehicle controller. After power is supplied, the vehicle controller controls the second switch to close according to the stack purge wake-up signal to supply power to the fuel cell system. After power is supplied to the fuel cell system, the purge equipment of the fuel cell system performs automatic purge.

[0055] A second purge is performed approximately three hours after the first scheduled purge, and a third scheduled purge is performed approximately three hours after the second scheduled purge. The principles of the second and third purges are the same as the first purge and are not detailed here to avoid redundancy. After each automatic purge, the fuel cell system controller sends a purge completion signal to the control module and vehicle controller. The control module outputs a low level to the first switch, disconnecting it. The vehicle controller then outputs a low level to the second switch, disconnecting it. At this point, the battery stops supplying power to the fuel cell system, effectively preventing excessive battery discharge that could affect vehicle starting.

[0056] According to the automatic purge device proposed in the embodiment of the present application, the automatic purge function of the fuel cell system after shutdown is realized by adding a switch component, thereby reducing manual control of the battery power supply, more efficiently ensuring the utilization rate of the battery power, ensuring the realization of the automatic purge function of the fuel cell system under low temperature conditions, and reducing the battery power consumption to ensure the normal start-up of the vehicle.

[0057] An embodiment of the present application also provides a vehicle, comprising the automatic purge system as described above.

[0058] Next, the automatic purging method proposed in accordance with an embodiment of the present application will be described with reference to the accompanying drawings.

[0059] Figure 6 It is a flow chart of the automatic purge method according to an embodiment of the present application.

[0060] like Figure 6 As shown, the automatic purge method utilizes the above automatic purge system to perform automatic purge, comprising the following steps:

[0061] In step S101 , a power-off signal of an ignition switch or a stack blow wake-up signal of a fuel cell system is acquired.

[0062] In step S102 , the switch assembly is controlled to close according to the power-off signal of the ignition switch or the stack blow wake-up signal of the fuel cell system, so as to conduct the power supply circuit between the power supply device and the fuel cell system.

[0063] It is understandable that the embodiment of the present application can control the closing of the switch component according to the power-off signal of the ignition switch or the stack blowing wake-up signal of the fuel cell system, and use the switch component to conduct the power supply circuit between the power supply device and the fuel cell system.

[0064] In an embodiment of the present application, after controlling the switch component to close according to the power-off signal of the ignition switch, it also includes: obtaining the duration of the switch component being closed; after the duration is greater than a preset duration, controlling the switch component to open.

[0065] The preset duration can be set according to specific circumstances and is not specifically limited thereto. For example, it can be set to 30 minutes or 40 minutes.

[0066] It can be understood that after the embodiment of the present application controls the switch assembly to close according to the power-off signal of the ignition switch, the switch assembly is controlled to close after the switch closing time exceeds the preset time to prevent the battery from over-discharging and affecting the vehicle starting.

[0067] In step S103 , the purge device of the fuel cell system is controlled to perform automatic purge.

[0068] It is understandable that the embodiment of the present application can control the purge device of the fuel cell system to perform automatic purge after the power supply circuit between the power supply device and the fuel cell system is turned on.

[0069] It should be noted that the above explanation of the embodiment of the automatic purge system is also applicable to the automatic purge method of this embodiment, and will not be repeated here.

[0070] According to the automatic purge method proposed in this application, the closing of the switch component can be controlled according to the power-off signal of the ignition switch or the blowing stack wake-up signal of the fuel cell system, the power supply circuit between the power supply equipment and the fuel cell system can be turned on, and the automatic purge function of the fuel cell system can be controlled, thereby reducing manual control of the battery power supply, more efficiently ensuring the utilization rate of the battery power, ensuring the realization of the automatic blowing function of the fuel cell system under low temperature conditions, and reducing the battery power consumption to ensure the normal start-up of the vehicle.

[0071] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the above automatic purging method.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, "N" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0074] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

Claims

1. An automatic purge system, characterized in that: include: Ignition switches, power supply equipment and purge equipment for fuel cell systems; A switch assembly, used to turn on or off a power supply circuit between the power supply device and the fuel cell system; The control component is used to control the closure of the switch component according to the power-off signal of the ignition switch or the stack blowing wake-up signal of the fuel cell system, and control the purge device of the fuel cell system to perform automatic purge after the power supply circuit between the power supply device and the fuel cell system is turned on.

2. The automatic purge system according to claim 1, characterized in that: The control assembly includes a fuel cell system controller, a vehicle controller and a control module, wherein: The fuel cell system controller sends the stack blowing wake-up signal to the control module and the vehicle controller, and controls the purge device of the fuel cell system to perform automatic purge after the power supply circuit between the power supply device and the fuel cell system is turned on; The control module and the vehicle controller control the switch assembly to close according to the power-off signal or the stack blowing wake-up signal to conduct the power supply circuit between the power supply device and the fuel cell system.

3. The automatic purge system according to claim 2, characterized in that: The control module and the vehicle controller are further used to: after controlling the switch component to close according to the power-off signal of the ignition switch, obtain the duration of the switch component being closed, and control the switch component to open after the duration is greater than a preset duration.

4. The automatic purge system according to claim 2 or 3, characterized in that: The switch assembly comprises: a first switch element and a second switch element, wherein: The first switch is arranged between the power supply device and the vehicle controller, and the second switch is arranged between the vehicle controller and the fuel cell system; The control module is used to control the closing and opening of the first switch element, and the vehicle controller is used to control the closing and opening of the second switch element.

5. The automatic purge system according to claim 4, characterized in that: Also includes: A manual power switch, wherein the manual power switch is connected to the power supply device and the first switch element respectively.

6. The automatic purge system according to claim 4, characterized in that: Also includes: A distribution box, wherein an input end of the distribution box is connected to the first switch element, and an output end of the distribution box is respectively connected to the second switch element and the vehicle controller.

7. A vehicle, characterized in that: Comprising the automatic purge system as described in any one of claims 1-6.

8. An automatic purging method, characterized in that: The method uses the automatic purge system according to any one of claims 1 to 6 to perform automatic purge, wherein the method comprises the following steps: Obtain the power-off signal of the ignition switch or the stack blowing wake-up signal of the fuel cell system; Controlling the switch assembly to close according to a power-off signal of an ignition switch or a stack blowing wake-up signal of the fuel cell system to conduct a power supply circuit between a power supply device and the fuel cell system; The purge device of the fuel cell system is controlled to perform automatic purge.

9. The automatic purging method according to claim 8, characterized in that: After controlling the switch assembly to close according to the power-off signal of the ignition switch, the method further comprises: Get the duration of the switch component being closed; After the duration is longer than a preset duration, the switch component is controlled to be disconnected.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the automatic purging method according to claim 8 or 9.

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