Apparatus and method for controlling power-on and power-off of fuel cell system

Abstract

The embodiment of the invention provides a method for controlling power-on and power-off of a fuel cell system. The method comprises the following steps: controlling the on-off state of a controllable switch (14) at least based on the on-off state of a storage battery power supply switch (13), the on-off state of a high-voltage assembly (2) in a high-voltage circuit, the on-off state of a low-voltage control assembly (12) for controlling the high-voltage assembly (2) and / or the on-off state of an automobile key switch (15) so as to execute the power-on operation or the power-off operation of the fuel cell system, and the storage battery power supply switch (13) and the controllable switch are connected in parallel to an on-off circuit between the storage battery (11) for providing low-voltage power supply and the low-voltage control assembly. The invention also relates to an apparatus and a computer program product for controlling power-on and power-off of a fuel cell system. According to the invention, the power-on operation or the power-off operation of the fuel cell system is controlled by controlling the switching time of the on-off state of the controllable switch, so that the operation difficulty of the power-on and power-off process is effectively simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a device for controlling the power-on and power-off of a fuel cell system, a method for controlling the power-on and power-off of a fuel cell system, and a computer program product for at least assisting in implementing the steps of the method according to the present invention. Background Art

[0002] During the power-off process of a fuel cell vehicle using a fuel cell as a power source, it is necessary to wait for the fuel cell reactor to complete the purge procedure, and at the same time, the fuel cell also needs to perform system power-off. The entire duration may need to be maintained for several minutes, and high voltage needs to be maintained during this process. Therefore, the high-voltage power supply circuit of the entire vehicle system cannot be turned off before the fuel cell completes the above process. When the user needs to leave the vehicle, the main power switch cannot be immediately turned off, but needs to wait for several minutes until the fuel cell reactor completes the purge procedure and system power-off before the main power switch can be turned off. This obviously increases the driver's operation difficulty and is prone to misoperation. If the user operates improperly, it will cause irreversible damage to the fuel cell, reducing the reliability and service life of the fuel cell.

[0003] Therefore, how to reduce the operation difficulty during the power-on and power-off process of the fuel cell system has become a technical problem to be solved currently. Summary of the Invention

[0004] The object of the present invention is to provide a device for controlling the power-on and power-off of a fuel cell system, a method for controlling the power-on and power-off of a fuel cell system, and a computer program product to at least partially solve the problems in the prior art.

[0005] According to a first aspect of the present invention, there is provided a method for controlling the power-on and power-off of a fuel cell system, the method comprising:

[0006] - Step S1: Controlling the switch state of a controllable switch based on at least the switch state of a battery power supply switch, the switch state of a high-voltage component in a high-voltage circuit, the switch state of a low-voltage control component for controlling the high-voltage component, and / or the switch state of a vehicle key switch to perform a power-on operation or a power-off operation of the fuel cell system, wherein the battery power supply switch and the controllable switch are connected in parallel on a switching circuit between a battery for providing low-voltage power supply and the low-voltage control component.

[0007] The core concept of the present invention lies in: controlling the power-on operation or power-off operation of the fuel cell system by controlling the switching timing of the controllable switch, effectively simplifying the operation difficulty of the user for the power-on and power-off processes of the fuel cell system, and ensuring the safe and reliable power-off of the fuel cell system even when the user operates improperly, thereby avoiding irreversible damage to the fuel cell caused by improper user operation and effectively improving the reliability and service life of the fuel cell.

[0008] According to a second aspect of the present invention, there is provided an apparatus for controlling the power-on and power-off of a fuel cell system, characterized in that the apparatus comprises the following components:

[0009] - A storage battery, which is configured to provide low-voltage power supply for the low-voltage control component and the switch control circuit;

[0010] - A low-voltage control component, which is configured to control the high-voltage components in the high-voltage circuit of the fuel cell system;

[0011] - A storage battery power supply switch and a controllable switch, which are connected in parallel on the on-off circuit between the storage battery and the low-voltage control component and cooperate with each other to control the conduction or cut-off of the on-off circuit;

[0012] - An automotive key switch, which is connected in series between the vehicle controller and the storage battery power supply switch; and

[0013] - A vehicle controller, which is connected in series between the automotive key switch and the controllable switch,

[0014] and is configured to execute the method according to the present invention.

[0015] According to a third aspect of the present invention, there is provided a computer program product, such as a computer-readable program carrier, containing computer program instructions, which when executed by a processor at least assist in implementing the steps of the method according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Next, the present invention will be described in more detail by referring to the accompanying drawings, and the principles, features and advantages of the present invention can be better understood. The accompanying drawings include:

[0017] Figure 1 A structural block diagram of an apparatus for controlling the power-on and power-off of a fuel cell system according to an exemplary embodiment of the present invention is shown;

[0018] Figure 2 A flowchart of a method of an apparatus for controlling the power-on and power-off of a fuel cell system according to an exemplary embodiment of the present invention is shown;

[0019] Figure 3The flowchart of a method for controlling the power-on and power-off of a fuel cell system according to another exemplary embodiment of the present invention is shown;

[0020] Figure 4 The flowchart of the power-on operation of a fuel cell system according to another exemplary embodiment of the present invention is shown;

[0021] Figure 5 The flowchart of the first power-off operation of a fuel cell system according to another exemplary embodiment of the present invention is shown;

[0022] Figure 6 The flowchart of the second power-off operation of a fuel cell system according to another exemplary embodiment of the present invention is shown; and

[0023] Figure 7 The flowchart of the third power-off operation of a fuel cell system according to another exemplary embodiment of the present invention is shown. Detailed Description of the Invention

[0024] In order to make the technical problems to be solved, technical solutions and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the protection scope of the present invention.

[0025] Figure 1 The structural block diagram of a device 1 for controlling the power-on and power-off of a fuel cell system according to an exemplary embodiment of the present invention is shown.

[0026] As Figure 1 shown, the device 1 may include a storage battery 11, which is configured to provide low-voltage power supply for components in the low-voltage circuit of the fuel cell system, such as Figure 1 the low-voltage control component 12 and the vehicle controller 16 in Figure 2 which is represented by the solid-line connection in Figure 2 The low-voltage control component 12 includes, for example, low-voltage controllers or low-voltage actuators other than the vehicle controller 16, which are configured to control the high-voltage components 2 in the high-voltage circuit of the fuel cell system. The dashed-arrow in

[0027] Optionally, the battery-powered switch 13 is particularly configured as a double-pole double-throw switch composed of a first switch and a second switch. The first switch is configured to control the conduction or cut-off of the on-off circuit in response to the human-machine interaction instruction of the battery-powered switch 13, and the second switch is configured to maintain the same switch state as the first switch. Considering that the current flowing through the first switch for controlling the conduction or cut-off of the on-off circuit is relatively large and its switch state is difficult to be directly monitored, the second switch can be set with current isolation. The vehicle controller 16 can monitor the switch state of the first switch by collecting the switch state of the second switch. For the sake of clarity, in the sense of the present invention, the switch state of the battery-powered switch 13 means the switch state of the second switch in the double-pole double-throw switch monitored by the vehicle controller, which can reflect the switch state of the first switch and will not be repeated. For example, when the vehicle controller 16 monitors the cut-off state of the battery-powered switch 13, it can determine the power-off request instruction of the high-voltage component 2 and send a control signal for turning off the high-voltage component 2 to the low-voltage control component 12 through the CAN bus.

[0028] The vehicle key switch 15 can be connected in series between the vehicle controller 16 and the battery-powered switch 13 and is configured to control the activation of the vehicle controller 16 or the cut-off of the high-voltage component 2 based on the human-machine interaction instruction of the vehicle key. For example, when the vehicle key switch 15 switches from the cut-off state to the closed state, it can wake up and activate the vehicle controller 16. The activated vehicle controller 16 will monitor the state signal of the vehicle key switch 15. When the vehicle controller 16 monitors that the vehicle key switch 15 switches from the closed state to the cut-off state, it can determine the power-off request instruction of the high-voltage component 2 and send a control signal for turning off the high-voltage component 2 to the low-voltage control component 12 through the CAN bus, etc. Thus, the switching of the operating conditions is completed, which will be described in detail in the method according to the present invention.

[0029] Optionally, the controllable switch 14 can be configured as a relay, and its switch state is controlled by the vehicle controller 16. The vehicle controller 16 is configured to control the switch state of the controllable switch 14 based at least on the switch state of the battery-powered switch 13 (especially the state signal of its second switch in the case where the battery-powered switch 13 is configured as a double-pole double-throw switch), the switch state of the vehicle key switch 15, the switch state of the high-voltage component 2, and / or the switch state of the low-voltage control component 12. Here, the vehicle controller 16 can provide a supply voltage to the controllable switch 14 and control the switch state of the controllable switch 14 by the on-off of the supply voltage, which is shown by the solid arrow in Figure 2 At the same time, the vehicle controller 16 can obtain the switch state of the controllable switch 14 according to the on-off state of the supply voltage.

[0030] In addition, the vehicle controller 16 is further configured to control a wake-up signal for placing the low-voltage control component 12 in a ready state at least based on the switch state of the battery power supply switch 13, the switch state of the vehicle key switch 15, and the switch state of the high-voltage component 2, including enabling and disabling the wake-up signal. Meanwhile, the switch state of the high-voltage component 2 and the switch state of the low-voltage control component 12 can be sent to the vehicle controller 16 through, for example, a CAN bus. In Figure 2 The transmission of these wake-up signals and / or status signals is represented by a dotted two-way arrow in

[0031] The following Figure 2 elaborates on the operating principle of the device 1 in detail with reference to the flowchart of the method for controlling the power-on and power-off of a fuel cell system according to an exemplary embodiment of the present invention shown

[0032] As Figure 2 shown, the method may include step S1. In step S1, the switch state of the controllable switch 14 is controlled at least based on the switch state of the battery power supply switch 13, the switch state of the high-voltage component 2 in the high-voltage circuit, the switch state of the low-voltage control component 12 for controlling the high-voltage component 2, and / or the switch state of the vehicle key switch 15 to perform the power-on operation or power-off operation of the fuel cell system. Wherein, the battery power supply switch 13 and the controllable switch 14 are connected in parallel on the on-off circuit between the battery 11 for providing low-voltage power supply and the low-voltage control component 12.

[0033] Herein, the power-on operation or power-off operation of the fuel cell system can be determined at least based on the switch state of the battery power supply switch 13 and / or the switch state of the vehicle key switch 15, and the switch state of the controllable switch 14 is controlled at least based on the switch state of the high-voltage component 2 and / or the switch state of the low-voltage control component 12, so that the battery power supply switch 13 and the controllable switch 14 cooperate with each other to achieve the conduction or cut-off of the on-off circuit to perform the determined power-on operation or power-off operation. The following Figure 3 elaborates in detail with reference to the flowchart of the method for controlling the power-on and power-off of a fuel cell system according to another exemplary embodiment of the present invention shown

[0034] As Figure 3 shown, the step S1 may at least include steps S11 to S15. In step S11, it is judged whether the battery power supply switch 13 is placed in an off state or a closed state. If the battery power supply switch 13 is placed in a closed state, then in step S12, it is judged whether the vehicle key switch 15 is placed in a closed state or an off state.

[0035] If the vehicle key switch 15 is placed in the closed state, then in step S13, control the switching state of the controllable switch 14 at least based on the switching state of the high-voltage component 2 to perform the power-on operation of the fuel cell system.

[0036] If the vehicle key switch 15 is placed in the off state, the vehicle controller 16 can determine the power-off request instruction of the high-voltage component 2 based on the closed state of the battery power supply switch 13 and the off state of the vehicle key switch 15. Then, in step S14, control the switching state of the controllable switch 14 at least based on the switching state of the high-voltage component 2 and / or the switching state of the low-voltage control component 12 to perform the first power-off operation of the fuel cell system.

[0037] If the battery power supply switch 13 is placed in the off state, the vehicle controller 16 can determine the power-off request instruction of the high-voltage component 2 only based on the off state of the battery power supply switch 13. Then, in step S15, control the switching state of the controllable switch 14 at least based on the switching state of the high-voltage component 2 and / or the switching state of the low-voltage control component 12 to perform the second power-off operation of the fuel cell system.

[0038] It should be noted that during the normal power-off operation of the fuel cell system, the user will wait until both the high-voltage component 2 and the low-voltage control component 12 are switched to the off state - that is, the fuel cell reactor completes the purge procedure and the system discharges electricity - before turning off the battery power supply switch 13, thereby electrically isolating the low-voltage control component 12 and the vehicle controller 16 from the low-voltage power supply circuit; while during the abnormal power-off operation of the fuel cell system, the user turns off the battery power supply switch 13 before the high-voltage component 2 and / or the low-voltage control component 12 are switched to the off state, or even turns off the battery power supply switch 13 before turning off the vehicle key switch 15. Therefore, the present invention adopts separately set first and second power-off operations, and through the control strategy of the controllable switch 14, ensures that the low-voltage control component 12 and the vehicle controller 16 are safely and reliably electrically isolated from the low-voltage power supply circuit.

[0039] The following combines Figures 4 to 6 to elaborate in detail the power-on and power-off operation processes of the fuel cell system.

[0040] Figure 4 The flowchart of the power-on operation of the fuel cell system according to another exemplary embodiment of the present invention is shown. The following only elaborates on the differences from the Figure 3 embodiment shown, and the same steps are not repeated for the sake of brevity.

[0041] During the power-on operation of the fuel cell system, the user closes the battery power supply switch 13 and the vehicle key switch 15 in sequence, so both the battery power supply switch 13 and the vehicle key switch 15 are in the closed state.

[0042] As Figure 4 shown, the step S13 may at least include steps S131 to S134. In step S131, the vehicle controller 16 is awakened and turned on, and the controllable switch 14 is controlled by the vehicle controller 16 to remain off, and a wake-up signal for putting the low-voltage control component 12 in a ready state is enabled by the vehicle controller 16. After receiving the wake-up signal, the low-voltage control component 12 is put in a ready state, that is, the preparation work for sending a control instruction to the high-voltage component 2 is completed. Here, the low-voltage control component 12 can send a control instruction for putting the high-voltage component 2 in a conducting state to the high-voltage component 2 only after receiving a high-voltage conduction control instruction issued by the driver and / or a start instruction of the fuel cell system issued by the vehicle controller 16. For example, the driver places the gear position of the vehicle key switch 15 in the ignition position and performs a braking operation, thereby issuing the high-voltage conduction control instruction and being acquired by the vehicle controller 16. Also, for example, the vehicle controller 16 can issue a start instruction of the fuel cell system based on the state of charge evaluation of the vehicle power battery.

[0043] After waking up the low-voltage control component 12, the state signal of the high-voltage component 2 can be monitored in real time, and the controllable switch 14 is switched from the off state to the closed state only when the conduction state signal of the high-voltage component 2 is received. This control logic can be implemented through the loop process of steps S132 to S134. In step S132, it is judged whether the state signal of the high-voltage component 2 is a conduction state signal or an off state signal. If the state signal of the high-voltage component 2 is an off state signal, then in step S133, the vehicle controller 16 controls the controllable switch 14 to remain off, and returns to step S132 to continue monitoring the state signal of the high-voltage component 2. If the state signal of the high-voltage component 2 is a conduction state signal, then in step S134, the vehicle controller 16 controls the controllable switch 14 to remain closed, thereby exiting the above loop process, that is, completing the power-on operation process of the fuel cell system, and returning to step S11 to monitor whether the user performs a power-off operation process based on the operation instructions of the battery power supply switch 13 and / or the vehicle key switch 15.

[0044] It should be noted that after the fuel cell system completes the power-on operation, the battery power supply switch 13 and the controllable switch 14 connected in parallel to the on-off circuit are both in the closed state. When the battery power supply switch 13 remains in the closed state, only the change in the switch state of the controllable switch 14 can no longer trigger the on-off state switching of the on-off circuit, and thus can no longer affect the operating state of the fuel cell system, especially the operating state of the components in the low-voltage power supply circuit. Therefore, under the configuration scheme of the present invention, the functional safety analysis of the controllable switch 14 can be omitted.

[0045] Figure 5 The flowchart of the first power-off operation of the fuel cell system according to another exemplary embodiment of the present invention is shown. In normal power-off operation and abnormal power-off operation, the user usually first turns off the vehicle key switch 15 when the battery power supply switch 13 is in the closed state, thereby triggering the execution of the first power-off operation of the fuel cell system, i.e., step S14, which can at least include steps S141 to S147 as Figure 5 shown. For the sake of clarity, Figure 5 only steps S141 to S147 included in step S14 are shown.

[0046] In step S141, the vehicle control unit 16 controls the controllable switch 14 to remain closed and shuts off the high-voltage component 2. During the power-off operation, considering that the power-off process of the high-voltage component 2 will last for a certain period of time (for example, the fuel cell reactor completes the purge procedure), it is necessary to monitor the status signal of the high-voltage component 2 in real time through the vehicle control unit 16 and wait to receive the off-state signal of the high-voltage component 2 before shutting off the low-voltage control component 12 for controlling the high-voltage component 2. Otherwise, the high-voltage component 2 will be in an out-of-control state and cause irreversible damage to the high-voltage component 2. This can be achieved through the loop process of steps S142 to S144.

[0047] In step S142, it is determined whether the status signal of the high-voltage component 2 is an on-state signal or an off-state signal. If the status signal of the high-voltage component 2 is an on-state signal, then in step S143, the vehicle control unit 16 controls the controllable switch 14 to remain closed and returns to step S142 to continue monitoring the status signal of the high-voltage component 2. If the status signal of the high-voltage component 2 is an off-state signal, then in step S144, the vehicle control unit 16 deactivates the wake-up signal for placing the low-voltage control component 12 in the ready state, thereby exiting the above loop process.

[0048] After the wake-up signal is deactivated, the shutdown process of the low-voltage control component 12 is triggered. Here, the shutdown process of the low-voltage control component 12 also lasts for a certain period of time, such as performing a function self-check process, a system parameter storage process, etc. Therefore, it is also necessary to wait until the low-voltage control component 12 completes the shutdown process and receives the shutdown status signal of the low-voltage control component 12 before switching the controllable switch 14 from the closed state to the off state, which can be achieved through the loop process of steps S145 to S147.

[0049] In step S145, it is judged whether the status signal of the low-voltage control component 12 is a conduction status signal or a shutdown status signal. If the status signal of the low-voltage control component 12 is a conduction status signal, then in step S146, the vehicle controller 16 is used to control the controllable switch 14 to remain closed, and the process returns to step S145 to continue monitoring the status signal of the low-voltage control component 12. If the status signal of the low-voltage control component 12 is a shutdown status signal, then in step S147, the vehicle controller 16 is used to control the controllable switch 14 to turn off, and the vehicle controller 16 is placed in the sleep state, thereby exiting the above loop process.

[0050] During the normal power-down operation process, after both the high-voltage component 2 and the low-voltage control component 12 are in the off state, the user switches the battery power supply switch 13 from the closed state to the off state; while in the abnormal power-down operation of the fuel cell system, the user turns off the battery power supply switch 13 before the high-voltage component 2 and / or the low-voltage control component 12 is switched to the off state, or even turns off the battery power supply switch 13 before turning off the vehicle key switch 15. By setting the second power-down operation of the present invention, the influence of the turn-off timing of the battery power supply switch 13 can be eliminated, ensuring that the low-voltage control component 12 and the vehicle controller 16 are safely and reliably electrically isolated from the low-voltage power supply circuit.

[0051] Figure 6 The flowchart of the second power-down operation of the fuel cell system according to another exemplary embodiment of the present invention is shown. As Figure 6 shown, the step S15 may at least include steps S151 to S156. For the sake of clarity, Figure 6 only steps S151 to S156 included in step S15 are shown.

[0052] In the case where the battery power supply switch 13 is placed in the off state, the vehicle controller 16 can determine the power-off request instruction of the high-voltage component 2 only based on the off state of the battery power supply switch 13. Here, it is necessary to monitor whether the high-voltage component 2 is in the off state, thereby judging whether the current power-down operation is a normal power-down operation or an abnormal power-down operation, which can be achieved through the loop process of steps S151 to S153.

[0053] In step S151, it is determined whether the status signal of the high-voltage component 2 is a conduction status signal or a cut-off status signal. If the status signal of the high-voltage component 2 is a conduction status signal, which means that the user has turned off the battery power supply switch 13 before the high-voltage component 2 switches to the cut-off state, that is, the current power-down operation is an abnormal power-down operation, then in step S152, the vehicle controller 16 is used to control the controllable switch 14 to remain closed, and the process returns to step S151 to continue monitoring the status signal of the high-voltage component 2. If the status signal of the high-voltage component 2 is a cut-off status signal, then in step S153, the wake-up signal used to place the low-voltage control component 12 in the ready state is deactivated, thereby exiting the above loop process. It can be understood that in the case where the current power-down operation is a normal power-down operation, step S153 will be quickly executed and the above loop process will be exited, while in the case where the current power-down operation is an abnormal power-down operation, it is necessary to wait until the high-voltage component 2 switches to the cut-off state before step S153 is executed and the above loop process is exited.

[0054] After the wake-up signal is deactivated, the low-voltage control component 12 will perform a cut-off process. Here, it is also necessary to wait until the low-voltage control component 12 completes the cut-off process and receives the cut-off status signal of the low-voltage control component 12 before switching the controllable switch 14 from the closed state to the cut-off state, which can be achieved through the loop process of steps S154 to S156.

[0055] In step S154, it is determined whether the status signal of the low-voltage control component 12 is a conduction status signal or a cut-off status signal. If the status signal of the low-voltage control component 12 is a conduction status signal, which means that the user has turned off the battery power supply switch 13 before the low-voltage control component 12 switches to the cut-off state, that is, the current power-down operation is an abnormal power-down operation, then in step S155, the vehicle controller 16 is used to control the controllable switch 14 to remain closed, and the process returns to step S154 to continue monitoring the status signal of the low-voltage control component 12. If the status signal of the low-voltage control component 12 is a cut-off status signal, then in step S156, the vehicle controller 16 is used to control the controllable switch 14 to be cut off, and the vehicle controller 16 is placed in the sleep state, thereby exiting the above loop process. It can be understood that in the case where the current power-down operation is a normal power-down operation, the low-voltage control component 12 and the controllable switch 14 are already in the cut-off state, so the above loop process will also be quickly exited, while in the case where the current power-down operation is an abnormal power-down operation, it is necessary to wait until the low-voltage control component 12 switches to the cut-off state before step S156 is executed and the above loop process is exited.

[0056] After the vehicle controller 16 is placed in the sleep state, since both the controllable switch 14 and the battery power supply switch 13 connected in parallel on the on-off circuit are in the off state, the low-voltage control component 12 and the vehicle controller 16 will be immediately electrically isolated from the low-voltage power supply circuit.

[0057] It should be noted that if the high-voltage component 2 is always in the off state during the entire operation of the fuel cell system, which means that the controllable switch 14 is always in the off state, then when the user turns off the battery power supply switch 13, the loop process of steps S151 to S153 will be immediately exited. And since both the controllable switch 14 and the battery power supply switch 13 are in the off state, the on-off circuit between the battery 11 and the low-voltage control component 12 will be immediately powered off, triggering the low-voltage control component 12 to switch to the off state. Thus, the loop process of steps S154 to S156 is exited, and the low-voltage control component 12 and the vehicle controller 16 are electrically isolated from the low-voltage power supply circuit, quickly completing the power-down process of the fuel cell system.

[0058] Figure 7 The flowchart of the third power-down operation of the fuel cell system according to another exemplary embodiment of the present invention is shown. For example, in the event of a vehicle emergency or during vehicle maintenance, it may be necessary to immediately turn off the components in the low-voltage circuit of the fuel cell system, including the low-voltage control component 12 and the vehicle controller 16. Therefore, a forced power-down operation process with the highest priority level should be set, which can function independently of the power-on and power-off operation processes described above.

[0059] As Figure 7 shown, the step S1 may further include steps S161 and S162. In step S161, it is judged whether the battery power supply switch 13 in the closed state has switched its switch state a pre-given number of times within a pre-given time period and the final state is the off state. If the battery power supply switch 13 switches its switch state a pre-given number of times within a pre-given time period and the final state is the off state, for example, performs three switch state switches within 1 second, and the battery power supply switch 13 completes the state switch of closing - off - closing - off, then the controllable switch 14 is controlled to turn off by the vehicle controller 16, and the vehicle controller 16 is placed in the sleep state to perform the third power-down operation of the fuel cell system.

[0060] According to the embodiments of the present invention, by controlling the switching timing of the switch state of the controllable switch 14 to control the power-on operation or power-down operation of the fuel cell system, the operation difficulty of the user for the power-on and power-down processes of the fuel cell system is effectively simplified. Even in the case of improper user operation, it can ensure the safe and reliable power-down of the fuel cell system, thereby avoiding irreversible damage to the fuel cell caused by improper user operation, and effectively improving the reliability and service life of the fuel cell.

[0061] In addition, it should be noted that the step numbers described herein do not necessarily represent the order of precedence, but are merely a kind of reference numeral for the drawings. According to specific circumstances, the order can be changed as long as the technical purpose of the present invention can be achieved.

[0062] It should be understood that in this text, expressions such as "first", "second", "third", etc. are only for descriptive purposes and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly specifying the quantity of the indicated technical features.

[0063] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even in the case where a single embodiment is described only with respect to a specific feature. The feature examples provided in the present disclosure are intended for illustrative purposes only and not for limitation, unless otherwise stated. In specific implementations, multiple features can be combined with each other according to actual needs and when technically feasible. Various substitutions, alterations, and modifications can also be conceived without departing from the spirit and scope of the present invention.

Claims

1. A method for controlling the power-on and power-off of a fuel cell system, the method comprising: Step S1: Controlling the switching state of a controllable switch (14) based at least on the switching state of a battery power supply switch (13), the switching state of a high-voltage component (2) in a high-voltage circuit, the switching state of a low-voltage control component (12) for controlling the high-voltage component (2), and / or the switching state of a vehicle key switch (15) to perform a power-on operation or a power-off operation of the fuel cell system, wherein the battery power supply switch (13) and the controllable switch (14) are connected in parallel on an on-off circuit between a battery (11) for providing low-voltage power supply and the low-voltage control component (12).

2. The method according to claim 1, wherein Determining the power-on operation or the power-off operation of the fuel cell system based at least on the switching state of the battery power supply switch (13) and / or the switching state of the vehicle key switch (15), and controlling the switching state of the controllable switch (14) based at least on the switching state of the high-voltage component (2) and / or the switching state of the low-voltage control component (12) to perform the determined power-on operation or power-off operation.

3. The method according to claim 2, characterized in that, The step S1 at least includes: Step S11: Judging whether the battery power supply switch (13) is in an off state or a closed state; Step S12: If the battery power supply switch (13) is in a closed state, judging whether the vehicle key switch (15) is in a closed state or an off state; Step S13: If the vehicle key switch (15) is in a closed state, controlling the switching state of the controllable switch (14) based at least on the switching state of the high-voltage component (2) to perform a power-on operation of the fuel cell system; Step S14: If the vehicle key switch (15) is in an off state, controlling the switching state of the controllable switch (14) based at least on the switching state of the high-voltage component (2) and / or the switching state of the low-voltage control component (12) to perform a first power-off operation of the fuel cell system; and Step S15: If the battery power supply switch (13) is in an off state, controlling the switching state of the controllable switch (14) based at least on the switching state of the high-voltage component (2) and / or the switching state of the low-voltage control component (12) to perform a second power-off operation of the fuel cell system.

4. The method according to claim 3, wherein The step S13 at least includes: Step S131: Waking up and turning on a vehicle controller (16), controlling the controllable switch (14) to remain off through the vehicle controller (16), and enabling a wake-up signal for putting the low-voltage control component (12) in a ready state through the vehicle controller (16); Step S132: Judging whether the state signal of the high-voltage component (2) is a conduction state signal or an off state signal; Step S133: If the state signal of the high-voltage component (2) is an off state signal, controlling the controllable switch (14) to remain off through the vehicle controller (16) and returning to step S132; and Step S134: If the status signal of the high-voltage component (2) is a conducting status signal, control the controllable switch (14) to remain closed through the vehicle controller (16), and return to Step S11.

5. The method according to claim 3, wherein The Step S14 at least includes: Step S141: Control the controllable switch (14) to remain closed through the vehicle controller (16), and turn off the high-voltage component (2); Step S142: Determine whether the status signal of the high-voltage component (2) is a conducting status signal or a cut-off status signal; Step S143: If the status signal of the high-voltage component (2) is a conducting status signal, control the controllable switch (14) to remain closed through the vehicle controller (16), and return to Step S142; Step S144: If the status signal of the high-voltage component (2) is a cut-off status signal, deactivate the wake-up signal for putting the low-voltage control component (12) in a ready state through the vehicle controller (16); Step S145: Determine whether the status signal of the low-voltage control component (12) is a conducting status signal or a cut-off status signal; Step S146: If the status signal of the low-voltage control component (12) is a conducting status signal, control the controllable switch (14) to remain closed through the vehicle controller (16), and return to Step S145; and Step S147: If the status signal of the low-voltage control component (12) is a cut-off status signal, control the controllable switch (14) to turn off through the vehicle controller (16), and put the vehicle controller (16) in a sleep state.

6. The method according to claim 3, characterized in that The Step S15 at least includes: Step S151: Determine whether the status signal of the high-voltage component (2) is a conducting status signal or a cut-off status signal; Step S152: If the status signal of the high-voltage component (2) is a conducting status signal, control the controllable switch (14) to remain closed through the vehicle controller (16), and return to Step S151; Step S153: If the status signal of the high-voltage component (2) is a cut-off status signal, deactivate the wake-up signal for putting the low-voltage control component (12) in a ready state; Step S154: Determine whether the status signal of the low-voltage control component (12) is a conducting status signal or a cut-off status signal; Step S155: If the status signal of the low-voltage control component (12) is a conducting status signal, control the controllable switch (14) to remain closed through the vehicle controller (16), and return to Step S154; and Step S156: If the status signal of the low-voltage control component (12) is a cut-off status signal, control the controllable switch (14) to turn off through the vehicle controller (16), and put the vehicle controller (16) in a sleep state.

7. The method according to any one of claims 1 to 6, characterized in that The Step S1 further includes: Step S161: Determine whether the battery power supply switch (13) in the closed state undergoes a pre-given number of switch state transitions within a pre-given time period and the final state is the cut-off state; and Step S162: If the battery power supply switch (13) undergoes a pre-given number of switch state transitions within a pre-given time period and the final state is the off state, the vehicle control unit (16) controls the controllable switch (14) to turn off and places the vehicle control unit (16) in a sleep state to perform the third power-down operation of the fuel cell system.

8. An apparatus (1) for controlling the power-on and power-off of a fuel cell system, characterized in that, The device (1) comprises the following components: A battery (11) configured to provide low-voltage power supply for the low-voltage control component (12) and the switch control circuit; A low-voltage control component (12) configured to control the high-voltage components (2) in the high-voltage circuit of the fuel cell system; A battery power supply switch (13) and a controllable switch (14) which are connected in parallel on the on-off circuit between the battery (11) and the low-voltage control component (12) and cooperate with each other to control the conduction or cut-off of the on-off circuit; An automotive key switch (15) which is connected in series between the vehicle control unit (16) and the battery power supply switch (13); and A vehicle control unit (16) which is connected in series between the automotive key switch (15) and the controllable switch (14) and is configured to execute the method according to any one of claims 1 to 7.

9. The device (1) according to claim 8, characterized in that, The controllable switch (14) is configured as a relay.

10. The device (1) according to claim 8 or 9, characterized in that, The battery power supply switch (13) is configured as a double-pole double-throw switch composed of a first switch and a second switch. The first switch is configured to control the conduction or cut-off of the on-off circuit in response to a human-machine interaction instruction of the battery power supply switch (13), and the second switch is configured to maintain the same switch state as the first switch. The vehicle control unit (16) monitors the switch state of the first switch by collecting the switch state of the second switch.

11. A computer program product, such as a computer-readable program carrier, comprising computer program instructions which, when executed by a processor, at least assist in implementing the steps of the method according to any one of claims 1 to 7.

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