Hydrogen energy hybrid vehicle hydrogen refueling control method and system and vehicle

Abstract

This invention provides a hydrogen refueling control method, system, and vehicle for hydrogen-powered hybrid vehicles. The hydrogen refueling control method includes: upon receiving a user-inputted hydrogen refueling command, outputting a vehicle high-voltage power-down command to control the high-voltage relay to disconnect and execute high-voltage power-down; when the high-voltage relay is in the disconnected state and the vehicle's high-voltage power-down is complete, outputting a cover unlock signal to control the opening of the hydrogen refueling cover; and when the hydrogen refueling cover is fully opened, outputting a hydrogen refueling permission signal to the hydrogen storage controller to initiate hydrogen refueling. This invention, after controlling the high-voltage relay to disconnect and execute high-voltage power-down, detects the power-down status of the high-voltage relay and the vehicle, and opens the hydrogen refueling cover only when the high-voltage relay is in the disconnected state and the vehicle's high-voltage power-down is complete. This effectively avoids performing the hydrogen refueling process under conditions such as high-voltage relay sticking or incomplete vehicle high-voltage power-down, thus ensuring safer hydrogen refueling.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a hydrogen refueling control method, system, and vehicle for hydrogen-powered hybrid vehicles. Background Technology

[0002] Hydrogen-powered hybrid vehicles consist of a pure electric component and a hydrogen system (hydrogen combustion to generate electricity). The hydrogen combustion to electricity system acts as a range extender for hybrid vehicles, charging the high-voltage battery and extending the vehicle's driving range.

[0003] For safety reasons, a high-pressure operation is required when refueling a vehicle with hydrogen. Before this operation, the hydrogen fuel cell system must also be shut down. Currently, the driver is primarily responsible for performing the high-pressure operation, then opening the hydrogen refueling cover. However, this process may involve issues such as the high-pressure relay sticking or the high-pressure energization of the vehicle not being completed, which could pose safety risks when refueling under these conditions.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this invention is to provide a hydrogen refueling control method, system, and vehicle for hydrogen-powered hybrid vehicles, aiming to solve the technical problem in the prior art where the control of hydrogen refueling is determined by the customer, which is detrimental to safe operation.

[0006] To achieve the above objectives, this invention proposes a hydrogen refueling control method for hydrogen-powered hybrid vehicles, the method comprising:

[0007] The hydrogen refueling control method for hydrogen-powered hybrid vehicles includes:

[0008] Upon receiving a hydrogen refueling command from the user, the system outputs a vehicle high-voltage power-off command to control the high-voltage relay to disconnect and execute the high-voltage power-off, and initiates a timing cycle.

[0009] If the timing duration is within the first time threshold, the high-voltage relay and the vehicle power-off status are detected.

[0010] When the high-voltage relay is in the off state and the high-voltage power-off of the vehicle is completed, the output cover unlocking signal controls the hydrogen refueling cover to open.

[0011] When the hydrogen filling cover is opened, a hydrogen filling permission signal is output to the hydrogen storage controller to start hydrogen filling.

[0012] Optionally, the step of outputting a cover unlocking signal to control the opening of the hydrogen refueling cover when the high-voltage relay is in the off state and the high-voltage power-off of the vehicle is completed includes:

[0013] When the high-voltage relay is in the open state and the high-voltage power-off of the whole vehicle is completed, the output of the first wake-up signal to the fuel-electric controller and the output of the second wake-up signal to the hydrogen storage controller are stopped.

[0014] When the duration of a single timing event is within the first time threshold, and the fuel cell controller and the hydrogen storage controller are in a silent state, the output cover unlock signal controls the opening of the hydrogen refueling cover.

[0015] Optionally, when the duration of a single timing event is within the first time threshold and the fuel cell controller and the hydrogen storage controller reach a silent state, the step of outputting a cover unlocking signal to control the opening of the hydrogen refueling cover includes:

[0016] When the duration of the first timing is within the first time threshold and the fuel cell controller and the hydrogen storage controller reach a silent state, a third wake-up signal is output to the hydrogen storage controller and a second timing is started. The third wake-up signal is used to control the hydrogen storage controller to enter the hydrogen refueling state.

[0017] When the second timing duration is within the second time threshold and the third wake-up signal and self-test completion signal are received from the hydrogen storage controller, the cover unlock signal is output to control the opening of the hydrogen filling cover.

[0018] Optionally, after the hydrogen filling cover is opened and a hydrogen filling permission signal is output to the hydrogen storage controller to start hydrogen filling, the following steps are included:

[0019] Detect the status of the hydrogenation cover plate;

[0020] When the hydrogen filling cover is in the closed state, a hydrogen filling stop command is output to the hydrogen storage controller, and three timing cycles are started;

[0021] When the duration of three timing cycles reaches the third time threshold, the output cover plate lock signal controls the hydrogen filling cover plate to lock.

[0022] Optionally, after the step of outputting a locking signal to control the locking of the hydrogenation cover when the duration of the three timings exceeds a third time threshold, the following steps are included:

[0023] When the hydrogen filling cover is locked, the third wake-up signal to the hydrogen storage controller is stopped, and four countdowns are started.

[0024] When the duration of the four counts reaches the fourth time threshold, a high-voltage power-on command is output to control the high-voltage relay to close and execute the high-voltage power-on.

[0025] When the high-voltage power-on is completed, the first wake-up signal is output to the fuel-electric controller and the second wake-up signal is output to the hydrogen storage controller.

[0026] Optionally, before outputting the vehicle high-voltage power-down command to control the high-voltage relay to disconnect and execute high-voltage power-down upon receiving the user's input hydrogen refueling command, and before starting a timing cycle, the process includes:

[0027] Obtain the current hydrogen reserve of the entire vehicle;

[0028] When the current hydrogen balance is less than a set threshold, a hydrogen refueling prompt is issued so that the user can input a hydrogen refueling command based on the prompt.

[0029] Optionally, upon receiving a hydrogen refueling command input by the user, the step of outputting a vehicle high-voltage power-down command to control the high-voltage relay to disconnect and execute high-voltage power-down, and initiating a timing cycle, includes:

[0030] Upon receiving a hydrogen refueling command from the user, the system checks the high-pressure status of the entire vehicle and the status of the fuel cell system;

[0031] When the vehicle is in a high-voltage energized state and the fuel cell system is in operation, a timer is started and a high-voltage power-off command for the fuel cell system is output to the fuel cell controller to control the fuel cell system to stop and purge until the fuel cell system is in a non-operating state.

[0032] When the fuel cell system is not in operation, a high-voltage power-down command is output to control the high-voltage relay to disconnect and execute the high-voltage power-down.

[0033] In addition, to achieve the above objectives, the present invention also provides a hydrogen refueling control system for a hydrogen energy hybrid vehicle, comprising: a vehicle controller, a fuel cell controller, a hydrogen storage controller, and first to fifth relays; the first to third relays are high-voltage relays;

[0034] One end of the first relay is connected to the first end of the vehicle controller, and the other end is connected to the battery pack.

[0035] One end of the second relay is connected to the second terminal of the vehicle controller, and the other end is connected to the battery pack;

[0036] One end of the third relay is connected to the third terminal of the vehicle controller, and the other end is connected to the battery pack;

[0037] One end of the fourth relay is connected to the fourth terminal of the vehicle controller, and the other end is connected to the first terminal of the fuel cell controller and the first terminal of the hydrogen storage controller.

[0038] One end of the fifth relay is connected to the fifth terminal of the vehicle controller, and the other end is connected to the second terminal of the hydrogen storage controller.

[0039] In addition, to achieve the above objectives, the present invention also provides a vehicle, the vehicle comprising: the aforementioned hydrogen fuel cell hybrid vehicle hydrogen refueling control system.

[0040] This invention provides a hydrogen refueling control method, system, and vehicle for hydrogen-powered hybrid vehicles. The hydrogen refueling control method includes: upon receiving a user-inputted hydrogen refueling command, outputting a vehicle high-voltage power-down command to control the high-voltage relay to disconnect and execute high-voltage power-down; when the high-voltage relay is in the disconnected state and the vehicle's high-voltage power-down is complete, outputting a cover unlock signal to control the opening of the hydrogen refueling cover; and when the hydrogen refueling cover is fully opened, outputting a hydrogen refueling permission signal to the hydrogen storage controller to initiate hydrogen refueling. This invention, after controlling the high-voltage relay to disconnect and execute high-voltage power-down, detects the power-down status of the high-voltage relay and the vehicle, and opens the hydrogen refueling cover only when the high-voltage relay is in the disconnected state and the vehicle's high-voltage power-down is complete. This effectively avoids performing the hydrogen refueling process under conditions such as high-voltage relay sticking or incomplete vehicle high-voltage power-down, thus ensuring safer hydrogen refueling. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0042] Figure 1 This is a flowchart illustrating the first embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles proposed in this invention.

[0043] Figure 2 This is a flowchart illustrating the second embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles proposed in this invention.

[0044] Figure 3 This is a flowchart illustrating the third embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles proposed in this invention.

[0045] Figure 4 This is a flowchart illustrating the fourth embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles proposed in this invention.

[0046] Figure 5 This is a schematic diagram of the hydrogen refueling control system for hydrogen-powered hybrid vehicles proposed in this invention.

[0047] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0050] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0051] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0052] Reference Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles proposed in this invention. Based on the structure of the aforementioned hydrogen refueling control system for hydrogen-powered hybrid vehicles, the first embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles of this invention is proposed.

[0053] In this embodiment, the hydrogen refueling control method for hydrogen-powered hybrid vehicles includes:

[0054] Step S10: Upon receiving the hydrogen refueling command input by the user, output the vehicle high-voltage power-off command to control the high-voltage relay to disconnect and execute the high-voltage power-off, and start a timer.

[0055] It should be understood that, in the first embodiment, the executing entity can be a vehicle controller. This vehicle controller can control the input / output states of the battery pack, the fuel cell controller, the clearing controller, and the operating states of other systems within the vehicle.

[0056] It's easy to understand that with the rapid development of vehicle technology, existing vehicle power-on / off controls tend to favor keyless start (i.e., the vehicle will directly engage high-voltage operation after unlocking). For these vehicles, when refueling with hydrogen, the user usually needs to actively execute a high-voltage power-off procedure, such as turning off the vehicle. However, after the user executes the power-off procedure, the high-voltage relays connected to the battery pack may become stuck, rendering the user's high-voltage power-off procedure invalid, and the vehicle remains in a high-voltage powered-on state. Furthermore, executing the high-voltage power-off procedure requires a certain execution time, namely the time it takes for the voltage on the high-voltage bus to drop to a low-voltage state; within this execution time, the vehicle's high-voltage power-off is not complete. Of course, there are also other situations such as vehicle controller malfunctions that may lead to abnormal high-voltage power-off, which will not be elaborated here.

[0057] It should be noted that the hydrogen refueling command is an instruction that controls the vehicle controller to perform the hydrogen refueling operation. This hydrogen refueling command is input by the user, specifically through a soft switch on the central control unit or a hydrogen refueling hardware switch inside the vehicle. The vehicle high-voltage power-down command is used to control the vehicle's power-down process. Typically, the battery pack and the vehicle controller are connected via a high-voltage relay. This vehicle high-voltage power-down command can control the high-voltage relay to disconnect, thereby initiating the vehicle high-voltage power-down process.

[0058] In practice, when the user knows the hydrogen reserve is insufficient, they can directly input a hydrogen refueling command via a soft switch on the central control display or a hardware switch inside the vehicle. Upon receiving the user's hydrogen refueling command, the vehicle controller generates a vehicle high-voltage power-down command and then uses this command to disconnect the high-voltage relay connected to the battery pack, thereby initiating the high-voltage power-down process. Furthermore, considering the execution time required for the vehicle high-voltage power-down process, in this embodiment, the vehicle controller can also control a timer inside the vehicle to start its first countdown simultaneously with the output of the high-voltage power-down command, in order to monitor the high-voltage power-down time.

[0059] Step S20: If the duration of a single timing operation is within the first time threshold, detect the high-voltage relay and the power-off status of the entire vehicle.

[0060] It should be understood that during the high-voltage power-down process of the vehicle, in order to confirm whether the high-voltage power-down is performed normally and whether it is completed, the vehicle controller can monitor the status of the high-voltage relay and the vehicle power-down status in real time. The high-voltage relay status includes an open state and a closed state. When the high-voltage relay is in the open state, the battery pack stops providing high-voltage power to the vehicle; when the high-voltage relay is in the closed state, the battery pack continues to provide normal high-voltage power. An open high-voltage relay indicates that the high-voltage relay has not stuck, and the vehicle can normally execute the high-voltage power-down process. In this embodiment, the vehicle power-down status includes two states: power-down completed and power-down incomplete.

[0061] It should be noted that the first time threshold is a pre-set time threshold used to detect the high-voltage relay and the vehicle's power-down status. This first time threshold is longer than the time required for the vehicle to complete the high-voltage power-down process. If the vehicle's high-voltage power-down is not completed within the first time threshold, it indicates that the vehicle may have a fault and cannot complete the high-voltage power-down process normally.

[0062] In this embodiment, the high-voltage relay and the vehicle's power-off status can be detected in real time. If the high-voltage relay is not closed or the vehicle's power-off is not complete, it is determined whether the timer's duration has reached a first time threshold. If the duration has not reached the first time threshold, the detection of the high-voltage relay and the vehicle's power-off status continues until the high-voltage relay is closed and the vehicle's power-off is complete, or the timer's duration reaches the first time threshold.

[0063] During the specific testing process, the high-voltage relay is tested by checking the voltage at the interface connected to the battery pack to determine if the high-voltage relay is in the open state. If the interface can normally receive the voltage output from the battery pack, it indicates that the high-voltage relay is in the closed state; if the interface cannot receive the voltage output from the battery pack, it indicates that the high-voltage relay is in the open state. The vehicle's power-off status is checked by detecting the voltage on the busbar; the specific voltage value on the busbar determines whether the vehicle has completed high-voltage power-off.

[0064] In addition, the detection of the high-voltage relay and the vehicle power-off status can be performed simultaneously. Of course, considering that disconnecting the high-voltage relay is the trigger condition for executing high-voltage power-off, in this embodiment, the high-voltage relay can be detected first, and the vehicle power-off status can be detected after the high-voltage relay is in the disconnected state. No specific limitation is made here.

[0065] Step S30: When the high-voltage relay is in the off state and the high-voltage power-off of the whole vehicle is completed, the output cover unlocking signal controls the hydrogen refueling cover to open.

[0066] It should be noted that if the high-voltage relay is detected to be in the open state within the first time threshold and the vehicle's high-voltage power-down is completed, the hydrogen refueling process can be executed directly. However, if either the high-voltage relay is not in the open state or the vehicle's high-voltage power-down is not completed when the first preset time has elapsed, the vehicle is deemed unable to complete the high-voltage power-down. The vehicle controller will then generate a hydrogen refueling failure alert and notify the user via the instrument panel or voice prompts. In this case, the high-voltage relay remains closed.

[0067] In practice, if the high-voltage relay is detected to be in an open state within the first time threshold and the vehicle's high-voltage power-off is completed, the vehicle controller can output a cover unlocking signal to the corresponding drive motor or cover control structure on the vehicle, thereby unlocking and opening the hydrogen refueling cover. The cover unlocking signal is the signal that controls the unlocking and opening of the cover on the hydrogen refueling port.

[0068] Step S40: When the hydrogen filling cover is opened, output a hydrogen filling permission signal to the hydrogen storage controller to start hydrogen filling.

[0069] It should be noted that the hydrogen storage controller is a controller that controls the process of refueling a vehicle with hydrogen. This controller is started or stopped by the vehicle controller. The controller can detect the pressure range, temperature range, leakage conditions, and valve operation of the hydrogen storage system, thereby controlling the refueling process. The hydrogen refueling permission signal is generated by the vehicle controller and is used to control the hydrogen storage controller to perform the refueling operation.

[0070] In practice, after the hydrogen filling cover is opened by the output cover unlocking signal, it is also necessary to detect whether the hydrogen filling cover has been opened. If it is confirmed that the hydrogen filling cover has been opened, a hydrogen filling permission signal can be output to the hydrogen storage controller. When the hydrogen storage controller receives the hydrogen filling permission signal, it starts to execute the hydrogen filling process.

[0071] Of course, after the vehicle controller outputs the hydrogen refueling permission command, the hydrogen storage controller can feed back the hydrogen refueling signal to the vehicle controller during the hydrogen refueling process, and the vehicle controller can monitor the hydrogen refueling process.

[0072] This embodiment provides a hydrogen refueling control method for a hydrogen-powered hybrid vehicle. The method includes: upon receiving a user-inputted hydrogen refueling command, outputting a vehicle high-voltage power-down command to control the high-voltage relay to disconnect and execute high-voltage power-down; when the high-voltage relay is in the disconnected state and the vehicle's high-voltage power-down is complete, outputting a cover unlock signal to control the opening of the hydrogen refueling cover; and when the hydrogen refueling cover is fully opened, outputting a hydrogen refueling permission signal to the hydrogen storage controller to initiate hydrogen refueling. In this embodiment, after controlling the high-voltage relay to disconnect and execute high-voltage power-down, the high-voltage relay and the vehicle's power-down status are detected. The hydrogen refueling cover is opened only when the high-voltage relay is in the disconnected state and the vehicle's high-voltage power-down is complete. This effectively avoids executing the hydrogen refueling process under conditions such as high-voltage relay sticking or incomplete vehicle high-voltage power-down, thus ensuring safer hydrogen refueling.

[0073] Reference Figure 2 , Figure 2 This is a flowchart illustrating the second embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles proposed in this invention. Based on the first embodiment described above, a second embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles of this invention is proposed.

[0074] In this embodiment, step S20 includes:

[0075] Step S201: When the high-voltage relay is in the off state and the high-voltage power-off of the whole vehicle is completed, stop outputting the first wake-up signal to the fuel-electric controller and stop outputting the second wake-up signal to the hydrogen storage controller.

[0076] It should be noted that the fuel cell controller is a device used to control the operating status of the fuel cell system. When hydrogen refueling is required, the fuel cell system needs to be shut down for safety reasons. Under high-voltage power-on conditions, both the fuel cell controller and the hydrogen storage controller are controlled by wake-up signals output from the vehicle controller. When the vehicle controller stops outputting wake-up signals, either the fuel cell controller or the hydrogen storage controller will enter a silent state. The first wake-up signal is used to control the normal operation of the fuel cell system by the fuel cell controller. The second wake-up signal is used to control the entire hydrogen storage system by the hydrogen storage controller.

[0077] It is easy to understand that when the high-voltage relay is in the open state and the high-voltage power-off of the whole vehicle is completed, the fuel cell system and the hydrogen storage system must be controlled to stop performing normal operations in order to avoid the fuel cell system and the hydrogen storage system affecting the hydrogen refueling process if they are in operation.

[0078] In specific implementation, when the high-voltage relay is in the open state and the high-voltage power-off of the vehicle is completed, the vehicle controller can stop outputting the first wake-up signal to the fuel cell controller, so that the fuel cell controller enters a silent state. At the same time, it can output the second wake-up signal to the hydrogen storage controller, so that the hydrogen storage controller enters a silent state.

[0079] Furthermore, in this embodiment, when the wake-up signals of the hydrogen storage controller and the fuel cell controller are the same, that is, when the first wake-up signal and the second wake-up signal are the same, the vehicle controller, the hydrogen storage controller, and the fuel cell controller can be directly connected through a relay. One end of the relay is connected to the vehicle controller, and the other end is connected to the fuel cell controller and the hydrogen storage controller respectively. This allows for simultaneous control of the fuel cell controller and the hydrogen storage controller, and reduces the number of relays in the overall architecture, thereby reducing control costs.

[0080] Step S202: When the duration of the first timing is within the first time threshold and the fuel cell controller and the hydrogen storage controller reach a silent state, the cover unlock signal is output to control the hydrogen refueling cover to open.

[0081] Understandably, after the vehicle controller outputs the first and second wake-up signals, it is necessary to confirm whether the fuel cell controller and the hydrogen storage controller are in a silent state. Once it is confirmed that both are in a silent state, the fuel cell system and the hydrogen storage system will not affect the hydrogen refueling process. At this point, the vehicle controller can output a cover unlock signal to open the hydrogen refueling cover, thus enabling the vehicle's hydrogen refueling process to proceed in a safer manner.

[0082] It's easy to understand that the initial time threshold also allows for reserved time to control the fuel cell controller and the hydrogen storage controller. When the vehicle controller outputs a wake-up signal, the fuel cell controller or hydrogen storage controller, which is in normal working condition, will send back a corresponding wake-up signal so that the vehicle controller knows that the fuel cell controller and the hydrogen storage controller are in normal working condition.

[0083] In practical implementation, if a timing period falls within the first time threshold, and both the first and second wake-up signals fail, and the relays connecting the vehicle controller, fuel cell controller, and hydrogen storage controller are disconnected, then the hydrogen storage controller and ignition controller can be considered to be in a silent state. If a timing period reaches the first time threshold and neither the first nor the second wake-up signal fails, or the relays are not disconnected, the hydrogen storage controller and fuel cell controller will not normally enter a silent state.

[0084] Step S202 further includes:

[0085] Step S2021: When the duration of the first timing is within the first time threshold and the fuel cell controller and the hydrogen storage controller reach a silent state, a third wake-up signal is output to the hydrogen storage controller, and a second timing is started. The third wake-up signal is used to control the hydrogen storage controller to enter the hydrogen refueling state.

[0086] It's easy to understand that the hydrogen refueling process requires the hydrogen storage controller to execute the relevant refueling procedures. Therefore, before outputting the cover unlock signal, the status of the hydrogen storage controller also needs to be checked. The third wake-up signal is used to control the hydrogen storage controller to perform a self-test. Upon receiving this third wake-up signal, the hydrogen storage controller can execute the hydrogen refueling procedures.

[0087] It should be noted that, to ensure the efficiency of the third wake-up signal in waking up the hydrogen storage controller, in this embodiment, the vehicle controller can also control the timer to restart while outputting the third wake-up signal, in order to determine whether the hydrogen storage controller can be woken up normally. For example, if the hydrogen storage controller is still not woken up when the second timing duration reaches the second time threshold, it can be determined that the hydrogen storage controller cannot be woken up normally using the third wake-up signal, and the hydrogen refueling process can be judged as a failure.

[0088] In the specific implementation process, the vehicle controller can first close the relay that is set separately between the vehicle controller and the hydrogen storage controller, and then output a third wake-up signal to the hydrogen storage controller through the relay, and start the timer for secondary timing.

[0089] Step S2022: When the third wake-up signal and self-test completion signal are received from the hydrogen storage controller within the second time threshold during the second timing period, the cover unlock signal is output to control the hydrogen filling cover to open.

[0090] Understandably, the hydrogen storage controller will automatically wake up upon receiving a third environmental signal. Once the wake-up is complete, it can send a third wake-up signal back to the vehicle controller so that the normal controller can know that the hydrogen storage controller has been woken up.

[0091] In addition, after the hydrogen storage controller is woken up, it needs to check its own status. If the check is successful, it can send a self-test completion signal to the vehicle controller. The self-test completion signal is the signal output by the hydrogen storage controller after the self-test is successful.

[0092] In practice, the vehicle controller can detect the third wake-up signal and the self-test completion signal fed back by the hydrogen storage controller when outputting the wake-up signal. If the third wake-up signal and the self-test completion signal are received within the second time threshold, it can be determined that the hydrogen storage controller can normally execute the hydrogen refueling process; otherwise, the hydrogen refueling process is considered to have failed. Of course, if it is determined that the hydrogen storage controller can normally execute the hydrogen refueling process, the vehicle controller can output a cover unlock signal to open the hydrogen refueling cover, thereby executing the hydrogen refueling process of the entire vehicle under safer conditions.

[0093] Reference Figure 3 , Figure 3 This is a flowchart illustrating the third embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles proposed in this invention. Based on the first or second embodiment described above, a third embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles of this invention is proposed.

[0094] In this embodiment, after step S40, the method further includes:

[0095] Step S401: Detect the status of the hydrogenation cover plate.

[0096] It should be understood that after the vehicle controller outputs the hydrogen refueling permission signal, the hydrogen storage controller controls the hydrogen refueling process. After the hydrogen refueling is completed, the vehicle still needs to perform the high-pressure process. Therefore, the vehicle controller also needs to confirm whether the hydrogen refueling process is complete.

[0097] It should be noted that after the hydrogen refueling process is completed, the personnel refueling the hydrogen will usually close the hydrogen refueling cover, which is in the open state. Therefore, in this embodiment, the vehicle controller can detect the state of the hydrogen refueling cover to more accurately determine whether hydrogen driving has been completed.

[0098] Step S402: When the hydrogen filling cover is in the closed state, output a hydrogen filling stop command to the hydrogen storage controller and start three timers.

[0099] It should be understood that after confirming that the hydrogen refueling cover is closed, the vehicle controller also needs to control the hydrogen storage controller to stop the hydrogen refueling process. Upon receiving this hydrogen refueling stop command, the hydrogen storage controller can stop the hydrogen refueling process.

[0100] Furthermore, to ensure that the hydrogen refueling process has been stopped, in this embodiment, the vehicle controller can also control the timer to start counting three times when the hydrogen refueling stop command is output. Since the hydrogen storage controller has performed a self-test process, it can be determined that the hydrogen refueling process has been stopped when the three counts reach a certain time threshold.

[0101] Step S403: When the duration of the three timings reaches the third time threshold, output a cover plate locking signal to control the hydrogenation cover plate to lock.

[0102] Understandably, when the three timing durations reach the third time threshold, it can be determined that the hydrogen refueling process and the process of stopping hydrogen refueling have been completed. In order to ensure the safety of hydrogen storage, the vehicle controller can output a cover lock signal to lock the hydrogen refueling cover, thereby preventing hydrogen leakage and further improving the safety of hydrogen storage in the vehicle.

[0103] Step S404: When the hydrogen filling cover is locked, stop outputting the third wake-up signal to the hydrogen storage controller and start four countdowns.

[0104] Understandably, after the hydrogen refueling cover is locked, the vehicle controller needs to control the hydrogen storage controller to return from the hydrogen refueling state to the silent state, thus making sufficient preparations for high-voltage power-on. Considering that the hydrogen storage controller has undergone self-testing, the vehicle controller can directly stop outputting the third wake-up signal here, controlling the hydrogen storage controller to return to the silent state.

[0105] It should be noted that, considering that the hydrogen storage controller needs a certain amount of time to re-enter the silent state, in this embodiment, the vehicle controller can also start four timers to ensure that the vehicle controller enters the silent state.

[0106] Step S405: When the duration of the four timing cycles reaches the fourth time threshold, output a high-voltage power-on command to control the high-voltage relay to close and execute high-voltage power-on.

[0107] It should be noted that the fourth time threshold is the time threshold for determining that the hydrogen storage controller has entered a silent state. Therefore, when the duration of the four timing cycles reaches the fourth time threshold, the vehicle controller outputs a high-voltage power-on command to control the high-voltage relay to close, thereby re-executing the high-voltage power-on process.

[0108] In addition, the relay separately set between the vehicle controller and the hydrogen storage controller needs to be disconnected before the vehicle controller re-outputs the high-voltage power-on command to avoid safety issues.

[0109] Step S406: When the high voltage power-on is completed, output the first wake-up signal to the fuel-electric controller and output the second wake-up signal to the hydrogen storage controller.

[0110] It is easy to understand that when the high voltage power-on is completed, the vehicle controller can output a first wake-up signal to the fuel cell controller and a second wake-up signal to the hydrogen storage controller, thereby restoring the hydrogen storage controller and the fuel cell controller to normal working state.

[0111] Reference Figure 3 , Figure 3This is a first flowchart illustrating the third embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles proposed in this invention. Based on the first, second, or third embodiment described above, a fourth embodiment of the hydrogen refueling control method for hydrogen-powered hybrid vehicles of this invention is proposed.

[0112] In this embodiment, the method further includes the following steps before step S10:

[0113] Step S01: Obtain the current hydrogen balance of the vehicle.

[0114] It should be understood that users may not know the remaining hydrogen level in the vehicle before inputting the hydrogen refueling command. Therefore, the vehicle controller needs to detect the remaining hydrogen level in the vehicle. The current hydrogen level refers to the amount of hydrogen remaining in the hydrogen storage tank at the time of detection. This current hydrogen level can be detected in real-time using sensors, or it can be detected by sensors at regular time intervals.

[0115] Step S02: When the current hydrogen balance is less than a set threshold, a hydrogen refueling prompt is issued so that the user can input a hydrogen refueling command according to the hydrogen refueling prompt.

[0116] It should be understood that the threshold is a pre-set hydrogen reserve value inside the vehicle, which is the minimum amount of hydrogen required for normal vehicle operation. The hydrogen refueling reminder indicates that the vehicle needs to be refueled when the current hydrogen reserve is low. This reminder can be a flashing light on the dashboard or a voice prompt.

[0117] In practice, when the current hydrogen reserve is less than a set threshold, the vehicle controller can prompt the user that the hydrogen reserve is insufficient. Upon receiving the hydrogen refueling prompt, the user can drive the vehicle to a gas station and then input a hydrogen refueling command according to the prompt. When the vehicle controller receives the hydrogen refueling prompt, it controls the fuel cell controller and the hydrogen storage controller to realize the hydrogen refueling process.

[0118] In this embodiment, step S10 specifically includes:

[0119] Step S101: Upon receiving a hydrogen refueling command input by the user, detect the high-pressure status of the entire vehicle and the status of the fuel cell system.

[0120] It should be understood that in this application, the vehicle typically performs a high-voltage power-on process directly after unlocking. Therefore, when hydrogen refueling is required, the vehicle controller defaults to the vehicle being in a high-voltage state. However, due to potential malfunctions or other factors, the vehicle may not be in a high-voltage state when receiving a user's hydrogen refueling command. In this case, to avoid performing a more complex hydrogen refueling process, the vehicle's high-voltage status can be checked first.

[0121] Furthermore, when the vehicle is under high voltage, the state of the fuel cell system is uncertain, but it is still possible to determine the state of the fuel cell system. The state of the fuel cell system mainly includes the operating state and the non-operating state.

[0122] The specific detection process can involve detecting the voltage value on the vehicle's busbar or the voltage value at the port connected to the battery pack to determine whether the vehicle is under high-voltage power. Alternatively, if the vehicle is not under high-voltage power, a cover unlock signal can be output to control the opening of the hydrogen refueling cover based on the user's input hydrogen refueling command. Once the cover is open, a hydrogen refueling permission signal is output to the hydrogen storage controller to initiate hydrogen refueling. The status detection process for the fuel cell electric system can be determined directly based on parameter changes caused by the fuel cell electric system. For example, parameters such as the remaining battery power and hydrogen reserves limit whether the fuel cell electric system is in an operational state.

[0123] Step S102: When the vehicle is in a high-voltage energized state and the fuel cell system is in operation, start a timer and output a high-voltage power-off command to the fuel cell controller to control the fuel cell system to stop and purge until the fuel cell system is in a non-operational state.

[0124] It should be understood that once the fuel cell system has been shut down and purged, it can be considered that the fuel cell system is in a non-operating state. When the vehicle's high-voltage status is high-voltage energized and the fuel cell system is in an operating state, the vehicle controller can send a fuel cell system high-voltage power-off command to the fuel cell controller. This fuel cell system power-off command can be used to control the fuel cell system to shut down and purge. After the fuel cell system has been shut down and purged, the vehicle high-voltage power-off process can begin, that is, the vehicle controller can output a vehicle high-voltage power-off command to control the high-voltage relay to disconnect and execute the high-voltage power-off.

[0125] Step S103: When the fuel cell system is in a non-operating state, output a vehicle high-voltage power-off command to control the high-voltage relay to disconnect and execute the high-voltage power-off.

[0126] Of course, when the vehicle is in a high-voltage energized state and the fuel cell system has completed the shutdown and purging process, the vehicle controller needs to execute the high-voltage de-energization process and then control the state switching of the hydrogen storage controller and the fuel cell controller until the hydrogen refueling process is completed.

[0127] Of course, if the fuel cell system is not in operation, the vehicle controller can directly output a high-voltage power-down command to control the high-voltage relay to disconnect and execute the high-voltage power-down.

[0128] In this embodiment, the vehicle controller can detect the current hydrogen reserve and promptly remind the user to refuel when the hydrogen reserve is insufficient. Furthermore, by detecting the vehicle's high-pressure status and the status of the fuel cell system, it determines whether the fuel cell system needs to be shut down for purging or whether the vehicle needs to undergo a high-pressure reduction process, thereby more accurately controlling the hydrogen refueling process.

[0129] In addition, to achieve the above objectives, the present invention also provides a hydrogen refueling control system for hydrogen-powered hybrid vehicles.

[0130] Reference Figure 5 The hydrogen refueling control system for the hydrogen-powered hybrid vehicle includes: a vehicle controller ECU1, a fuel cell controller ECU2, a hydrogen storage controller ECU13, and first to fifth relays; the first to third relays are high-voltage relays.

[0131] Among them, one end of the first relay RELAY1 is connected to the first end of the vehicle controller ECU1, and the other end is connected to the battery pack;

[0132] One end of the second relay RELAY2 is connected to the second end of the vehicle controller ECU1, and the other end is connected to the battery pack;

[0133] One end of the third relay RELAY3 is connected to the third terminal of the vehicle controller ECU1, and the other end is connected to the battery pack;

[0134] One end of the fourth relay RELAY4 is connected to the fourth terminal of the vehicle controller ECU1, and the other end is connected to the first terminal of the fuel cell controller ECU2 and the first terminal of the hydrogen storage controller ECU3.

[0135] One end of the fifth relay RELAY5 is connected to the fifth terminal of the vehicle controller ECU1, and the other end is connected to the second terminal of the hydrogen storage controller ECU3.

[0136] In practice, the vehicle controller ECU1 first detects the remaining hydrogen level in the vehicle. If the hydrogen level is too low, it prompts the user to add hydrogen. Upon receiving the hydrogen refueling prompt, the user can input a hydrogen refueling command. When the vehicle controller ECU1 receives this command, it detects the high-voltage status of the vehicle. If the high-voltage status is high-voltage powered on, it outputs a high-voltage power-off command to control the first to third relays to disconnect, performing a high-voltage power-off operation and initiating a timer. If the timer duration is within a first time threshold, it detects the on / off status of the first to third relays and the vehicle power-off status. If the first to third relays are all disconnected and there is no sticking, and the vehicle has completed the high-voltage power-off, the vehicle controller disconnects the fourth relay RELAY4, thereby putting the hydrogen storage controller ECU3 and the fuel cell controller ECU2 into a silent state. When the fuel cell controller and the hydrogen storage controller reach a silent state, the fifth relay RELAY5 is closed, and then a third wake-up signal is output to the hydrogen storage controller to control the hydrogen storage controller to enter the hydrogen refueling state and start a second timer. When the second timer duration is within the second time threshold and the third wake-up signal and self-test completion signal are received from the hydrogen storage controller ECU3, a cover unlock signal is output to control the opening of the hydrogen refueling cover. When the hydrogen refueling cover is normally opened, a hydrogen refueling permission signal is output to the hydrogen storage controller ECU3 to start hydrogen refueling. During the hydrogen refueling process, the vehicle controller ECU1 can also detect the status of the hydrogen refueling cover. When the hydrogen refueling cover is in the closed state, a hydrogen refueling stop command is output to the hydrogen storage controller and a three-timer is started. Then, when the three-timer duration reaches the third time threshold, a cover lock signal is output to control the locking of the hydrogen refueling cover. Finally, when the hydrogen filling cover is locked, the third wake-up signal to the hydrogen storage controller is stopped, and four timing cycles are started. When the duration of the four timing cycles reaches the fourth time threshold, a high-voltage power-on command is output to control the high-voltage relay to close and perform high-voltage power-on. When the high-voltage power-on is completed, the first wake-up signal is output to the fuel-electric controller and the second wake-up signal is output to the hydrogen storage controller, thereby completing the entire hydrogen refueling process.

[0137] Furthermore, in response to the trend of one-button vehicle start, the vehicle can directly enter a high-voltage power-on state when the vehicle is unlocked or the door is opened. If the user knows that the current hydrogen reserve is insufficient, the vehicle controller ECU1 can be directly awakened. When the vehicle controller ECU1 receives the hydrogen refueling command, it can directly output a third wake-up signal to the hydrogen storage controller ECU3. When the hydrogen storage controller ECU3 receives the third wake-up signal, it can execute the hydrogen refueling process.

[0138] In addition, considering that users may not necessarily know whether the current hydrogen reserve is sufficient, the vehicle controller ECU1 and the hydrogen storage controller ECU2 can be activated. The hydrogen storage controller ECU, under high voltage power-on state, can detect the current hydrogen reserve in the vehicle. If the current hydrogen reserve is less than a set threshold, a hydrogen refueling prompt will be issued, allowing the user to input a hydrogen refueling command according to the prompt. When the vehicle controller ECU1 receives the hydrogen refueling command, it can first stop outputting the second wake-up signal to the hydrogen storage controller ECU3 to put it into a silent state, and then output a third wake-up signal to the hydrogen storage controller ECU3. When the hydrogen storage controller ECU3 receives the third wake-up signal, it can execute the hydrogen refueling process.

[0139] Furthermore, considering that the fuel cell system may be operational, to ensure the safety of the hydrogen refueling process, the vehicle controller ECU1 and the fuel cell controller ECU2 can be activated. When the vehicle controller ECU1 receives the hydrogen refueling command input by the user, it can also determine the operating status of the fuel cell system through the fuel cell controller ECU2. When the vehicle's high-voltage status is high-voltage energized and the fuel cell system is operational, the vehicle controller can send a high-voltage power-down command to the fuel cell controller. This power-down command can be used to control the fuel cell system to shut down and purge. After the fuel cell system has shut down and purged, the vehicle high-voltage power-down process can begin, meaning the vehicle controller can output a high-voltage power-down command to control the high-voltage relay to disconnect and execute the high-voltage power-down. If the fuel cell system is not in operation or has been shut down and purged, the vehicle controller ECU1 can output a high-voltage power-down command to control the high-voltage relay to disconnect and perform high-voltage power-down. Then, it stops outputting the first wake-up signal to the fuel cell controller ECU2. When the fuel cell controller ECU2 is in a silent state, it outputs a third wake-up signal to the hydrogen storage controller ECU3. When the hydrogen storage controller ECU3 receives the third wake-up signal, it can execute the hydrogen refueling process.

[0140] Finally, considering the safety of the fuel cell system and the fact that users may not be aware of the current hydrogen reserve, the vehicle controller ECU1, fuel cell controller ECU2, and hydrogen storage controller ECU3 can be activated simultaneously. When the hydrogen storage controller ECU3 detects that the current hydrogen reserve is lower than a set threshold, the vehicle controller ECU1 will issue a hydrogen refueling prompt. Upon receiving a hydrogen refueling command from the user, the fuel cell controller ECU2 can also determine the operating status of the fuel cell system. When the vehicle's high-voltage status is high-voltage energized and the fuel cell system is operating, the vehicle controller can send a high-voltage power-down command to the fuel cell controller. This power-down command can be used to control the fuel cell system to shut down and purge. After the fuel cell system has shut down and purged, the vehicle high-voltage power-down process can begin, meaning the vehicle controller can output a high-voltage power-down command to control the high-voltage relay to disconnect and execute the high-voltage power-down. If the fuel cell system is not in operation or has been shut down and purged, the vehicle controller ECU1 can output a high-voltage power-down command to control the high-voltage relay to disconnect and perform high-voltage power-down. Then, it stops outputting the first wake-up signal to the fuel cell controller ECU2 and the second wake-up signal to the hydrogen storage controller ECU3, putting it into a silent state. Finally, it outputs a third wake-up signal to the hydrogen storage controller ECU3. When the hydrogen storage controller ECU3 receives the third wake-up signal, it can execute the hydrogen refueling process.

[0141] In addition, to achieve the above objectives, the present invention also provides a vehicle, the vehicle including the aforementioned hydrogen fuel cell hybrid vehicle hydrogen refueling control system.

[0142] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A hydrogen energy hybrid vehicle hydrogen refueling control method, characterized by, The hydrogen refueling control method for hydrogen-powered hybrid vehicles includes: Upon receiving a hydrogen refueling command from the user, the system outputs a vehicle high-voltage power-off command to control the high-voltage relay to disconnect and execute the high-voltage power-off, and initiates a timing cycle. If the timing duration is within the first time threshold, the high-voltage relay and the vehicle power-off status are detected. When the high-voltage relay is in the off state and the high-voltage power-off of the vehicle is completed, the output cover unlocking signal controls the hydrogen refueling cover to open. When the hydrogen filling cover is fully opened, a hydrogen filling permission signal is output to the hydrogen storage controller to start hydrogen filling; When the high-voltage relay is in the off state and the high-voltage power-off of the vehicle is completed, the output cover unlocking signal controls the opening of the hydrogen refueling cover, including: When the high-voltage relay is in the open state and the high-voltage power-off of the whole vehicle is completed, the output of the first wake-up signal to the fuel-electric controller and the output of the second wake-up signal to the hydrogen storage controller are stopped. When the duration of a single timing event is within the first time threshold, and the fuel cell controller and the hydrogen storage controller reach a silent state, the output cover unlock signal controls the opening of the hydrogen refueling cover. The step of outputting a cover unlocking signal to control the opening of the hydrogen refueling cover when the duration of a single timing is within the first time threshold and the fuel cell controller and the hydrogen storage controller are in a silent state includes: When the duration of the first timing is within the first time threshold and the fuel cell controller and the hydrogen storage controller reach a silent state, a third wake-up signal is output to the hydrogen storage controller and a second timing is started. The third wake-up signal is used to control the hydrogen storage controller to enter the hydrogen refueling state. When the self-test completion signal is received from the hydrogen storage controller within the second time threshold during the second timing period, the cover unlock signal is output to control the opening of the hydrogen filling cover.

2. The hydrogen energy hybrid vehicle hydrogen refilling control method of claim 1, wherein, After the hydrogen filling cover is opened, the process of outputting a hydrogen filling permission signal to the hydrogen storage controller to start hydrogen filling includes: Detect the status of the hydrogenation cover plate; When the hydrogen filling cover is in the closed state, a hydrogen filling stop command is output to the hydrogen storage controller, and three timing cycles are started; When the duration of three timing cycles reaches the third time threshold, the output cover plate lock signal controls the hydrogen filling cover plate to lock.

3. The hydrogen energy hybrid vehicle hydrogen refueling control method of claim 2, wherein The step of locking the hydrogenation cover by outputting a locking signal when the duration of the three timing cycles reaches the third time threshold includes: When the hydrogen filling cover is locked, the third wake-up signal to the hydrogen storage controller is stopped, and four countdowns are started. When the duration of the four counts reaches the fourth time threshold, a high-voltage power-on command is output to control the high-voltage relay to close and execute the high-voltage power-on. When the high-voltage power-on is completed, the first wake-up signal is output to the fuel-electric controller and the second wake-up signal is output to the hydrogen storage controller.

4. The hydrogen energy hybrid vehicle hydrogen refilling control method of claim 1, wherein, Before the process of receiving a hydrogen refueling command from the user, outputting a vehicle high-voltage power-down command to control the high-voltage relay to disconnect and execute high-voltage power-down, and initiating a timing cycle, includes: Obtain the current hydrogen reserve of the entire vehicle; When the current hydrogen balance is less than a set threshold, a hydrogen refueling prompt is issued so that the user can input a hydrogen refueling command based on the prompt.

5. The hydrogen energy hybrid vehicle hydrogen refueling control method of claim 4, wherein, Upon receiving a hydrogen refueling command input by the user, the system outputs a vehicle high-voltage power-down command to control the high-voltage relay to disconnect and execute high-voltage power-down, and initiates a timing cycle, including: Upon receiving a hydrogen refueling command from the user, the system detects the high-pressure status of the entire vehicle and the status of the fuel cell system. When the vehicle is in a high-voltage energized state and the fuel cell system is in operation, a timer is started and a high-voltage power-off command for the fuel cell system is output to the fuel cell controller to control the fuel cell system to stop and purge until the fuel cell system is in a non-operating state. When the fuel cell system is not in operation, a high-voltage power-down command is output to control the high-voltage relay to disconnect and execute the high-voltage power-down.

6. A hydrogen energy hybrid vehicle hydrogen refueling control system characterized by comprising: The hydrogen refueling control system for the hydrogen-powered hybrid vehicle is applied to the hydrogen refueling control method for the hydrogen-powered hybrid vehicle as described in any one of claims 1 to 5; The hydrogen refueling control system for the hydrogen-powered hybrid vehicle includes: a vehicle controller, a fuel cell controller, a hydrogen storage controller, and first to fifth relays; the first to third relays are high-voltage relays. One end of the first relay is connected to the first end of the vehicle controller, and the other end is connected to the battery pack. One end of the second relay is connected to the second terminal of the vehicle controller, and the other end is connected to the battery pack; One end of the third relay is connected to the third terminal of the vehicle controller, and the other end is connected to the battery pack; One end of the fourth relay is connected to the fourth terminal of the vehicle controller, and the other end is connected to the first terminal of the fuel cell controller and the first terminal of the hydrogen storage controller. One end of the fifth relay is connected to the fifth terminal of the vehicle controller, and the other end is connected to the second terminal of the hydrogen storage controller.

7. The hydrogen energy hybrid vehicle hydrogen refueling control system of claim 6, wherein, The vehicle controller is used to output a high-voltage power-down command to control the high-voltage relay to disconnect and execute the high-voltage power-down when it receives a hydrogen refueling command input by the user, and to start a timing cycle. The vehicle controller is used to detect the high-voltage relay and the vehicle power-off status when the duration of a single timing is within a first time threshold. The vehicle controller is also used to output a cover unlocking signal to control the opening of the hydrogen refueling cover when the high-voltage relay is in the off state and the high-voltage power-off of the vehicle is completed; The vehicle controller is also used to output a hydrogen refueling permission signal to the hydrogen storage controller to start hydrogen refueling when the hydrogen refueling cover is opened.

8. An automobile characterized by comprising: The vehicle includes the hydrogen refueling control system for a hydrogen-powered hybrid vehicle as described in claim 7.

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