Hybrid power system control method, hybrid power system and automobile

Abstract

The application provides a fuel cell system control method, a fuel cell system and an automobile. The fuel cell system control method comprises the following steps: obtaining a current residual capacity of a power battery; when a power-off signal is received, determining a capacity difference between the current residual capacity and a first capacity threshold; and when the capacity difference is greater than a first capacity increment, outputting a shutdown signal to control the fuel cell system to shut down. When the power-off signal is received, the capacity difference between the current residual capacity and the first capacity threshold is determined. When the capacity difference is greater than the first capacity increment, that is, after the fuel cell system charges the power battery for a period of time, the shutdown signal is outputted to control the fuel cell system to shut down, so that the fuel cell system is prevented from being directly turned off, the service life of the fuel cell is prevented from being damaged, and hydrogen energy is prevented from being wasted.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a control method for a fuel-electric system, a fuel-electric system, and an automobile. 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] The start-up and shutdown of the hydrogen fuel cell electric range extender consumes some hydrogen, and frequent start-ups and shutdowns waste hydrogen energy. Currently, the shutdown logic of the fuel cell electric system is full-power type (that is, the hydrogen fuel cell electric system will be shut off as soon as the vehicle is powered on). If this is when the fuel cell electric system has just started or the start-up time is very short, directly shutting off the fuel cell electric system will shorten its lifespan and waste hydrogen and the vehicle's electrical energy.

[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 control method for a fuel cell electric system, a fuel cell electric system, and an automobile, aiming to solve the technical problem in the prior art that directly shutting down a fuel cell electric system impairs its service life and wastes hydrogen energy.

[0006] To achieve the above objectives, the present invention proposes a control method for a gas-fired power system, the control method comprising:

[0007] Obtain the current remaining power of the power battery;

[0008] Upon receiving a power-off signal, determine the power difference between the current remaining power and the first power threshold.

[0009] When the difference in power consumption is greater than the first power consumption increment, a shutdown signal is output to control the gas-electric system to shut down.

[0010] Optionally, before outputting a shutdown signal to control the gas-electric system to shut down when the power difference is greater than the first power increment, the following steps are included:

[0011] Obtain the current ambient temperature and the first-time threshold;

[0012] The first power increment is determined based on the current ambient temperature and the first time threshold.

[0013] Optionally, after obtaining the current remaining power of the power battery, the method further includes:

[0014] When the current remaining power is greater than the second power threshold, a timer is started and a shutdown signal is output to control the gas-electric system to shut down;

[0015] When the timing duration reaches the second time threshold, the shutdown signal will stop being output.

[0016] Optionally, after initiating a timer and outputting a shutdown signal to control the shutdown of the gas-fired power system when the current remaining power is greater than the second power threshold, the method further includes:

[0017] Real-time monitoring of the remaining power of the power battery;

[0018] When the remaining charge of the power battery is less than the difference between the second charge threshold and the second charge increment, the shutdown signal is stopped.

[0019] Optionally, after obtaining the current remaining power of the power battery, the method further includes:

[0020] Check for the presence of a forced startup command;

[0021] If so, check the trigger status of the forced start / stop signal;

[0022] When a forced start-stop signal is detected, check whether there is a shutdown operation of the dynamic gas-electric system;

[0023] When the shutdown operation is detected, it is determined whether the current remaining power is greater than the second power threshold.

[0024] Optionally, after detecting whether a shutdown operation of the dynamic gas-electric system has occurred when a forced start-stop signal is detected, the method further includes:

[0025] If the shutdown operation is not detected, the step of real-time detection of the remaining power of the power battery is performed.

[0026] Optionally, after obtaining the current remaining power of the power battery, the method further includes:

[0027] Detect whether the user has activated the pure electric priority mode;

[0028] If so, then obtain the third power threshold corresponding to the pure electric priority mode;

[0029] When the current remaining power is greater than or equal to the third power threshold, a shutdown signal is output to control the gas-electric system to shut down.

[0030] Optionally, if so, after obtaining the third power threshold corresponding to the pure electric priority mode, the method further includes:

[0031] When the current remaining power is less than the third power threshold, the gas-electric system is controlled to maintain output to increase the remaining power of the power battery;

[0032] When the remaining power after the boost is greater than the fourth power threshold, a shutdown signal is output to control the gas-electric system to shut down, and the fourth power threshold is greater than the third power threshold.

[0033] In addition, to achieve the above objectives, the present invention also provides a gas-fired power system for executing the gas-fired power system control method.

[0034] In addition, to achieve the above objectives, the present invention also provides an automobile, the automobile comprising: a controller, a power battery, and the aforementioned fuel cell system.

[0035] This invention provides a control method for a fuel cell electric system, a fuel cell electric system, and a vehicle. The control method includes: acquiring the current remaining charge of the power battery; upon receiving a power-off signal, determining the charge difference between the current remaining charge and a first charge threshold; and when the charge difference is greater than a first charge increment, outputting a shutdown signal to control the fuel cell electric system to shut down. By determining the charge difference between the current remaining charge and the first charge threshold upon receiving a power-off signal, and when the charge difference is greater than the first charge increment (i.e., after the fuel cell electric system has been charging the power battery for a period of time), this invention controls the fuel cell electric system to shut down by outputting a shutdown signal, thereby avoiding the shortened lifespan of the fuel cell electric system and the waste of hydrogen energy caused by directly shutting it down. Attached Figure Description

[0036] 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.

[0037] Figure 1 A flowchart illustrating the first embodiment of the gas-fired power system control method proposed in this invention;

[0038] Figure 2 A flowchart illustrating the second embodiment of the gas-fired power system control method proposed in this invention;

[0039] Figure 3 A flowchart illustrating the third embodiment of the gas-fired power system control method proposed in this invention;

[0040] Figure 4 This is a flowchart illustrating the fourth embodiment of the gas-fired power system control method proposed in the invention.

[0041] 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

[0042] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] Reference Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the gas-fired power system control method proposed in this invention. Based on the structure of the aforementioned gas-fired power system, the first embodiment of the gas-fired power system control method of this invention is proposed.

[0047] In this embodiment, the gas-electric system control method includes:

[0048] Step S10: Obtain the current remaining power of the power battery.

[0049] It should be understood that, in the first embodiment, the executing entity can be a vehicle controller. This vehicle controller can collect data on the operating status of the power battery, the fuel cell system, and other systems within the vehicle, and control the start-stop status of the fuel cell system based on the collected information.

[0050] It should be noted that in this embodiment, the initial state of the fuel cell electric system is a normal operating state, during which the fuel cell electric system can charge the power battery. When the power battery has sufficient remaining charge, the fuel cell electric system is typically in a shutdown state; conversely, when the power battery has insufficient remaining charge, the fuel cell electric system will activate to charge the power battery. During normal vehicle operation, it is necessary to monitor the current remaining charge of the power battery in a timely manner so that the fuel cell electric system can be shut down promptly if the power battery has excessive remaining charge.

[0051] Understandably, the gas-electric system continuously charges the power battery during normal operation. In this embodiment, the gas-electric system can be shut down based on the current remaining charge of the power battery. If the power battery has an excess of charge, the gas-electric system does not need to continue charging it. The current remaining charge of the power battery is not a fixed value; it is related to the battery's charge / discharge state and varies at different times.

[0052] In practice, the current remaining power of the power battery can be detected by the power supply power and charging time of the gas-electric system, or by directly collecting the electrical parameters output by the power battery.

[0053] Step S20: Upon receiving a power-off signal, determine the power difference between the current remaining power and the first power threshold.

[0054] It should be noted that the power-down signal is the signal that the vehicle's high voltage is reduced. This power-down signal can be a key lock signal or a vehicle shutdown signal. The first battery level threshold is a preset battery level threshold used to determine the activation threshold of the electric combustion system. When the current remaining battery level is less than the first battery level threshold, the current remaining battery level is insufficient to support normal vehicle operation. In this case, the electric combustion system needs to be activated to charge the battery. The battery level difference is the difference between the current remaining battery level and the first battery level threshold, where the current remaining battery level is the minuend and the first battery level threshold is the subtrahend.

[0055] It should be understood that when the electric vehicle system is first started, the remaining charge of the power battery will gradually increase from the first charge threshold until it reaches the set maximum charge threshold. With a fixed charging power, this charge difference reflects the time it takes for the electric vehicle system to charge the power battery. The larger the charge difference, the longer the charging time; the smaller the charge difference, the shorter the charging time. For example, if the charge difference is zero, the electric vehicle system has just started and has not yet charged the power battery; at this point, the user should disconnect the vehicle.

[0056] In practice, a first power threshold can be determined based on the specific parameters of the power battery. Then, when the current remaining power is obtained at the moment the power is turned off, the difference between the remaining power of the unit and the first power threshold can be directly calculated to obtain the power difference value.

[0057] Step S30: When the power difference is greater than the first power increment, output a shutdown signal to control the gas-electric system to shut down.

[0058] It should be noted that the first power increment is the battery increment required for the vehicle to operate at maximum load power for a certain time threshold in pure electric mode while stationary. This first power increment is a pre-set increment used to determine the charging effectiveness of the fuel cell system. When the power difference reaches the first power increment, it indicates that the fuel cell system has been charging the power battery for a period of time. At this point, shutting down the fuel cell system will not reduce its lifespan or waste hydrogen energy. However, when the power difference has not reached the first power increment, it indicates that the fuel cell system has just started and has not effectively charged the power battery. This process will reduce the lifespan of the fuel cell system and waste hydrogen energy.

[0059] Understandably, when the electric power system is effectively charging the battery, the difference between the current remaining battery capacity and the first battery capacity threshold will be greater than the first battery capacity increment. In this case, the controller can directly output a shutdown signal to control the electric power system to shut down. Conversely, if the difference between the current remaining battery capacity and the first battery capacity threshold is less than the first battery capacity increment, the electric power system will maintain its current state and continue charging the battery until the difference between the current remaining battery capacity and the first battery capacity threshold is greater than the first battery capacity increment.

[0060] This embodiment provides a control method for a gas-electric system. The method includes: acquiring the current remaining charge of the power battery; upon receiving a power-off signal, determining the charge difference between the current remaining charge and a first charge threshold; and when the charge difference is greater than a first charge increment, outputting a shutdown signal to control the gas-electric system to shut down. This embodiment determines the charge difference between the current remaining charge and the first charge threshold upon receiving a power-off signal; and when the charge difference is greater than the first charge increment, i.e., after the gas-electric system has been charging the power battery for a period of time, it outputs a shutdown signal to control the gas-electric system to shut down, thereby avoiding the shortened lifespan of the gas-electric system and the waste of hydrogen energy caused by directly shutting it down.

[0061] Furthermore, this embodiment also includes a process for acquiring the first battery charge increment. It is understood that the battery charge increment is the increment required for the vehicle to operate at maximum load power for a certain time threshold in pure electric mode while stationary. This battery charge increment is related to the battery discharge process, and therefore is also affected by ambient temperature. In addition, the battery charge increment is also related to the required discharge time threshold; the larger the required discharge time threshold, the larger the corresponding battery charge increment.

[0062] In this embodiment, it is necessary to first obtain the ambient temperature at the moment the power signal is output and the first time threshold. The first time threshold is a time threshold set in advance by the user, and different first time thresholds can be set according to the specific first power increment requirements. For example, in order to extend the working time of the gas-fired power system as much as possible, a larger first time threshold can be set, which can further reduce the shutdown frequency of the gas-fired power system, thereby reducing hydrogen energy waste.

[0063] In practical implementation, upon receiving a power-off signal, the current ambient temperature and a pre-set first time threshold are first acquired. Then, the first power increment is accurately calculated based on the current ambient temperature and the first time threshold. Finally, the power difference is compared with the first power increment. When the power difference is greater than the first power increment, a shutdown signal is output to control the gas-electric system to shut down. By setting the first time threshold, the shutdown cycle of the gas-electric system can be further set, and combined with the influential ambient temperature, the shutdown of the gas-electric system can be more accurately controlled.

[0064] Reference Figure 2 , Figure 2 This is a flowchart illustrating a second embodiment of the gas-fired power system control method proposed in this invention. Based on the first embodiment described above, a second embodiment of the gas-fired power system control method of this invention is proposed.

[0065] In this embodiment, step S10 is followed by:

[0066] Step S40: When the current remaining power is greater than the second power threshold, start the timer and output a shutdown signal to control the gas-electric system to shut down.

[0067] It should be understood that the second power threshold is the maximum power threshold of the power battery. When the current remaining power of the power battery reaches the second power threshold, the gas-electric system does not need to continue charging the power battery. At this time, the gas-electric system has completed the charging process, that is, it has been running for a relatively long period of time. At this time, the gas-electric system can be shut down and the normal shutdown process can be performed.

[0068] It should be noted that, to prevent frequent restarts and shutdowns of the gas-fired power system when it begins the shutdown procedure, a certain time threshold can be set. Within this time threshold, the system will not restart. Therefore, when the gas-fired power system begins its shutdown process, a timer needs to be established to indicate that the system is in a shutdown state. The shutdown signal is output by the controller, controlling the gas-fired power system to perform the shutdown operation.

[0069] In practice, when the current remaining charge of the power battery is greater than the second charge threshold, the controller can output a shutdown signal to the gas-electric system to control the gas-electric system to shut down, and at the same time as outputting the shutdown signal, control the timer to start timing.

[0070] Step S50: When the timing duration reaches the second time threshold, stop outputting the stop signal.

[0071] It should be noted that the second time threshold is a pre-set time limit to prevent the gas-electric system from restarting within a short period. If the timing duration is within the second time threshold, restarting the gas-electric system may affect its lifespan and waste hydrogen energy. Therefore, within the second time threshold, the controller can continuously output a shutdown signal to the gas-electric system to prevent restarting within a short period, thus avoiding impact on its lifespan and hydrogen energy waste. When the timing duration reaches the second time threshold, the gas-electric system is already in a shutdown state and has maintained the second time threshold. Restarting the gas-electric system at this point will not affect its lifespan or waste hydrogen energy; it is part of the normal operation of the gas-electric system. The larger the second time threshold, the greater the time interval between the gas-electric system's shutdown and restart, the smaller the impact on its lifespan, and the less hydrogen is wasted.

[0072] It should be understood that when the controller stops outputting the shutdown signal, the gas-electric system can continue to collect parameters such as the remaining power of the power battery, and can restart the gas-electric system when it is necessary to charge the power battery.

[0073] In practice, the controller first acquires the user-set second time threshold, then monitors the timer's duration in real time. If the duration is less than the second time threshold, the controller continuously outputs a shutdown signal to the gas-fired power system to prevent it from restarting within a short period. If the duration reaches the second time threshold, the controller can clear the output shutdown signal, and then detect the conditions requiring a restart of the gas-fired power system.

[0074] Step S60: Real-time detection of the remaining power of the power battery.

[0075] It is easy to understand that the remaining power is the remaining power of the power battery when the gas turbine system is in a shutdown state and the power battery is continuously discharging. When there is a large amount of remaining power, the gas turbine system does not need to be started; and after the power battery has released a certain amount of power over a period of time, it can be determined whether to reset the shutdown signal of the gas turbine system based on the remaining power battery power.

[0076] Therefore, in the process of controlling the shutdown signal of the gas-electric system, it is also necessary to monitor the remaining power of the power battery in the discharge process in real time.

[0077] Step S70: When the remaining power of the power battery is less than the power difference between the second power threshold and the second power increment, stop outputting the shutdown signal.

[0078] It should be understood that the second charge increment is the increment required for the vehicle to operate at maximum load power for a certain time threshold under the current temperature conditions in pure electric mode. After the fuel cell system shuts down, when the charge released by the battery reaches this second charge increment, it can be considered that the fuel cell system has been shut down for a certain time threshold. Restarting the fuel cell system after this time will not affect the fuel cell system or waste hydrogen energy. The second charge increment can be set by the user; the larger the threshold of the second charge increment, the longer the battery discharge time. The second charge increment is sufficient to prevent the fuel cell system from restarting in a short period. The difference between the second charge threshold and the second charge increment should be greater than the sum of the first charge threshold and the first charge increment.

[0079] It should be noted that, given a fixed second battery increment, the difference between the second battery threshold and the second battery increment is typically a fixed value. This difference corresponds to the remaining battery level at which the user-set shutdown signal can be stopped. When the remaining battery level is less than the difference between the second battery threshold and the second battery increment, it indicates that the battery's normal power output is greater than the second battery increment.

[0080] Therefore, in this embodiment, the controller can stop outputting a shutdown signal when the remaining charge of the power battery is less than the difference between the second charge threshold and the second charge increment, i.e., the normal charge released by the power battery is greater than the second charge increment, and then detect the condition that the gas-electric system needs to be restarted.

[0081] In this embodiment, after the gas-electric system shuts down, the system is controlled to not restart for a period of time after shutdown based on the shutdown duration of the gas-electric system or the remaining power of the power battery after the shutdown. This allows for more accurate control of the shutdown and restart of the gas-electric system, avoiding the waste of hydrogen energy caused by frequent restarts of the gas-electric system.

[0082] Reference Figure 3 , Figure 3 This is a flowchart illustrating the third embodiment of the gas-fired power system control method proposed in this invention. Based on the first or second embodiment described above, a third embodiment of the gas-fired power system control method of this invention is proposed.

[0083] In this embodiment, after step S10, the method further includes:

[0084] Step S11: Check if a forced start command exists.

[0085] It should be understood that a forced start command is an instruction that forcibly controls the start of the gas-electric system. This forced start command is issued by the user, and in this application, it has the highest priority. Typically, this forced start command is issued by the user. When the controller detects the user's forced start command, it directly starts the gas-electric system, effectively preventing various unexpected situations from causing the gas-electric system to fail to start normally, such as power battery failure, incorrect sensor information, or logical errors.

[0086] Step S12: If yes, then check the trigger status of the forced start / stop signal.

[0087] It should be understood that when a forced start command is detected, the gas-electric system remains in the start-up state. To shut down the gas-electric system, it needs to be switched to a non-forced start state. The forced start shutdown signal is used to control the gas-electric system to exit the forced start state. This forced start shutdown signal includes both triggered and non-triggered states.

[0088] Therefore, in this embodiment, in order to control the shutdown process of the gas-electric system, it is also necessary to detect the triggering status of the forced start-stop signal, and when a shutdown is required, control the gas-electric system to exit the forced start state first. By combining the determination of whether the gas-electric system is in the forced start state with the determination of whether the gas-electric system is in the forced start state, it is possible to avoid the gas-electric system being unable to execute the shutdown process normally when in the forced start state, thereby achieving more accurate control over the shutdown of the gas-electric system.

[0089] Step S13: When a forced start-stop signal is detected, check whether there is a shutdown operation of the dynamic gas-electric system.

[0090] It should be noted that after the fuel cell system exits the forced start state, it will not necessarily execute a shutdown procedure. Whether the fuel cell system needs to shut down depends on the vehicle's specific operating status and parameters such as the remaining charge of the power battery. For example, if the fuel cell system exits the forced start state but the remaining charge of the power battery is very low and insufficient to support vehicle operation, the fuel cell system needs to charge the power battery; therefore, it cannot be directly shut down.

[0091] The shutdown operation is the process by which the gas turbine electric system prepares to enter the shutdown state. When this shutdown operation is detected, it indicates that the controller will determine whether to initiate the gas turbine electric system shutdown procedure based on the current remaining charge of the power battery.

[0092] In practice, when a forced start-stop signal is detected, the shutdown operation of the gas-fired power system can continue to be detected. If a shutdown operation is detected, the shutdown procedure of the gas-fired power system can be executed, thereby avoiding shutting down the gas-fired power system when it needs to be started.

[0093] Step S14: When the shutdown operation is detected, determine whether the current remaining power is greater than the second power threshold.

[0094] Step S15: If the shutdown operation is not detected, perform the step of real-time detection of the remaining power of the power battery.

[0095] Understandably, after detecting a shutdown operation in the power battery system, different operations need to be performed based on the specific detection results. When a shutdown operation is detected, the controller can determine the relationship between the battery's current remaining charge and a second charge threshold, thereby determining whether to initiate the shutdown process. When no shutdown operation is detected, the controller continuously monitors the current remaining charge of the power battery until the current remaining charge meets the shutdown conditions of the power battery system, at which point the shutdown process is initiated.

[0096] In this embodiment, by detecting the triggering status of the forced start command and the forced start-stop signal, as well as the shutdown operation of the gas-electric system, the shutdown of the gas-electric system can be controlled more accurately while ensuring that the gas-electric system does not frequently start and stop, thus avoiding the gas-electric system from failing to shut down normally or shutting down when the shutdown conditions are not met.

[0097] Reference Figure 4 , Figure 4 This is a flowchart illustrating the fourth embodiment of the gas-fired power system control method proposed in this invention. Based on any one of the first to third embodiments described above, a fourth embodiment of the gas-fired power system control method of this invention is proposed.

[0098] In this embodiment, after step S10, the method further includes:

[0099] Step S101: Detect whether the user has activated the pure electric priority mode.

[0100] It should be understood that the pure electric priority mode is an operating mode that prioritizes using the remaining charge of the power battery to provide the energy required for vehicle operation when the remaining charge is sufficient. Of course, operating modes can also include: a fuel cell-electric priority mode where the fuel cell system provides energy for vehicle operation, and a hybrid power supply mode where both the fuel cell-electric system and the power battery provide energy simultaneously. The activation status of the fuel cell-electric system differs depending on the vehicle's operating mode. For example, in pure electric priority mode, the fuel cell-electric system will only activate when the remaining charge of the power battery is insufficient; in fuel cell-electric priority mode, the fuel cell-electric system remains activated.

[0101] In practical implementation, since switching vehicle operating modes usually requires user input of a switching command, this embodiment can determine whether the vehicle is in pure electric priority mode by whether the user inputs a command to switch the operating mode to pure electric priority mode. Of course, other methods can also be used, which are not specifically limited here.

[0102] Step S102: If yes, then obtain the third power threshold corresponding to the pure electric priority mode.

[0103] It should be understood that the pure electric priority mode requires the remaining charge in the power battery to meet a certain charge threshold; otherwise, if the remaining charge in the power battery is insufficient, the pure electric priority mode cannot maintain normal vehicle operation. This third charge threshold is the charge threshold required by the power battery in pure electric priority mode.

[0104] Typically, a third battery level threshold is stored in the vehicle. In this embodiment, the third battery level threshold can be directly retrieved from the vehicle. Of course, if it is not preset in the vehicle, the third battery level threshold can also be obtained based on the user's current settings.

[0105] Step S103: When the current remaining power is greater than or equal to the third power threshold, output a shutdown signal to control the gas-electric system to shut down.

[0106] It's easy to understand that when the current remaining charge of the power battery is greater than the third charge threshold, the current remaining circuit of the power battery is sufficient, and there is no need to continue charging the power battery. At this time, the electric system can be shut down. In pure electric priority mode, the power battery provides the necessary power for vehicle operation until the current remaining charge of the power battery is less than the third charge threshold, at which point the pure electric priority mode is exited.

[0107] Furthermore, in this embodiment, step S102 is followed by...

[0108] Step S104: When the current remaining power is less than the third power threshold, control the gas-electric system to maintain the output state and increase the remaining power of the power battery.

[0109] It should be understood that if the current remaining charge of the power battery is less than the third charge threshold, even if the user activates the pure electric priority mode, the vehicle cannot enter pure electric priority mode due to the insufficient remaining charge of the power battery. Therefore, when detecting that the user has activated pure electric priority mode, but the current remaining charge is less than the third charge threshold, it is still necessary to control the electric system to maintain output to increase the remaining charge of the power battery, to avoid directly entering pure electric priority mode upon detecting the user's activation, which would cause the vehicle to malfunction.

[0110] Step S105: When the remaining power after the boost is greater than the fourth power threshold, output a shutdown signal to control the gas-electric system to shut down.

[0111] It should be noted that, to further avoid frequent start-stop of the electric combustion system, a fourth energy threshold is also set in this embodiment. This fourth energy threshold is the energy threshold that allows the vehicle to operate normally in pure electric priority mode. If the remaining energy of the power battery after boosting is greater than the third energy threshold, it directly enters pure electric priority mode, at which point the electric combustion system shuts down; as soon as the power battery starts discharging, the remaining energy will fall below the third energy threshold, thus requiring continuous start-stop of the electric combustion system.

[0112] To address the aforementioned issues, in this embodiment, the fourth energy threshold needs to be greater than the third energy threshold, and the difference between the two should ensure that the power battery provides sufficient power for the vehicle's operation for a sufficiently long period. During the charging process of the fuel cell system for the power battery, the remaining energy level of the power battery needs to be increased to the fourth energy threshold before a shutdown signal is output to control the fuel cell system to stop. In pure electric priority mode, when the power battery discharges to a level below the third energy threshold, the fuel cell system is restarted to recharge the power battery. This effectively avoids frequent start-stop cycles of the fuel cell system, which would damage its lifespan and waste hydrogen energy.

[0113] In addition, to achieve the above objectives, the present invention also provides a gas-fired power system for executing the gas-fired power system control method described in any of the above embodiments.

[0114] In addition, to achieve the above objectives, the present invention also provides an automobile, the automobile including the controller, the power battery and the combustion electric system.

[0115] 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 control method for a gas-fired power system, characterized in that, The control method for the gas-fired power system includes: Obtain the current remaining power of the power battery; Upon receiving a power-off signal, determine the power difference between the current remaining power and the first power threshold. When the power difference is greater than the first power increment, a shutdown signal is output to control the combustion electric system to shut down; the first power increment is the battery increment required for the vehicle to operate at maximum load power for a certain time threshold in pure electric mode while stationary. When the power difference is not greater than the first power increment, no shutdown signal is output to control the gas-electric system to shut down, so as to avoid directly shutting down the newly started gas-electric system due to power failure, which would damage the service life of the gas-electric system and cause waste of hydrogen energy. After obtaining the current remaining power of the power battery, the method further includes: When the current remaining power is greater than the second power threshold, a timer is started and a shutdown signal is output to control the gas-electric system to shut down; When the timing reaches the second time threshold, the shutdown signal will be stopped to avoid the short-term restart of the gas-fired power system, which would affect the lifespan of the gas-fired power system and cause waste of hydrogen energy.

2. The control method for a gas-fired power system as described in claim 1, characterized in that, Before outputting a shutdown signal to control the gas-electric system to shut down when the power difference is greater than the first power increment, the following steps are included: Obtain the current ambient temperature and the first-time threshold; The first power increment is determined based on the current ambient temperature and the first time threshold.

3. The control method for a gas-fired power system as described in claim 1, characterized in that, After initiating a timer and outputting a shutdown signal to control the shutdown of the gas-fired power system when the current remaining power is greater than the second power threshold, the method further includes: Real-time monitoring of the remaining power of the power battery; When the remaining charge of the power battery is less than the difference between the second charge threshold and the second charge increment, the shutdown signal is stopped.

4. The control method for a gas-fired power system as described in claim 3, characterized in that, After obtaining the current remaining power of the power battery, the method further includes: Check for the presence of a forced startup command; If so, check the trigger status of the forced start / stop signal; When a forced start-stop signal is detected, check whether there is a shutdown operation of the gas-fired power system; When the shutdown operation is detected, it is determined whether the current remaining power is greater than the second power threshold.

5. The control method for a gas-fired power system as described in claim 4, characterized in that, After detecting whether a shutdown operation of the gas-fired power system has occurred when a forced start-stop signal is detected, the method further includes: If the shutdown operation is not detected, the step of real-time detection of the remaining power of the power battery is performed.

6. The control method for a gas-fired power system as described in claim 1, characterized in that, After obtaining the current remaining power of the power battery, the method further includes: Detect whether the user has activated the pure electric priority mode; If so, then obtain the third power threshold corresponding to the pure electric priority mode; When the current remaining power is greater than or equal to the third power threshold, a shutdown signal is output to control the gas-electric system to shut down.

7. The control method for a gas-fired power system as described in claim 6, characterized in that, If so, then after obtaining the third power threshold corresponding to the pure electric priority mode, the method further includes: When the current remaining power is less than the third power threshold, the gas-electric system is controlled to maintain output to increase the remaining power of the power battery; When the remaining power after the boost is greater than the fourth power threshold, a shutdown signal is output to control the gas-electric system to shut down, and the fourth power threshold is greater than the third power threshold.

8. A gas-fired power generation system, characterized in that, The gas-fired power system is used to execute the gas-fired power system control method according to any one of claims 1-7.

9. A car, characterized in that, The vehicle includes: a controller, a power battery, and the fuel cell electric system as described in claim 8.

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