Gas storage control method and system

Abstract

The invention relates to the technical field of program control, in particular to a gas storage control method and system. The method comprises the following steps that when the air pressure of a vehicle-mounted air tank and the air pressure of a medium-pressure air tank are balanced, first air pressure is obtained, and the first air pressure is the current air pressure of the medium-pressure air tank; meanwhile, the current air pressure of the high-pressure air tank is obtained and set as second air pressure; according to the air pressure difference between the first air pressure and the second air pressure, the risk value of switching the medium-pressure air tank to the high-pressure air tank is calculated through a risk value calculation function, and if the risk value is larger than a preset risk threshold value, the following steps are executed; and the hydrogen storage chamber pressurizes the medium-pressure gas tank through the air compressor until the gas pressure in the medium-pressure gas tank reaches a medium-pressure switching threshold value, and then the medium-pressure gas tank is triggered to be switched to the high-pressure gas tank to supply gas to the vehicle-mounted gas tank. According to the method, hydrogen can be stored in the vehicle-mounted gas tank more safely.

Description

Technical Field

[0001] The present application relates to the field of program control technology, and in particular to a gas storage control method and system. Background Art

[0002] As a clean and efficient energy source, hydrogen has broad application prospects in the field of transportation. Hydrogen fuel cell vehicles use hydrogen as fuel, generate electricity through hydrogen-oxygen reaction, drive the motor to work, and realize the operation of the vehicle.

[0003] However, to achieve large-scale application of hydrogen fuel cell vehicles, key issues such as on-board hydrogen storage and hydrogen supply at hydrogen refueling stations must be resolved. At present, hydrogen refueling stations usually use high-pressure gas storage technology to refill on-board hydrogen storage tanks with gas tanks of different pressure levels. In the existing gas storage control method of hydrogen refueling stations, low-pressure, medium-pressure, and high-pressure gas tanks are generally used to fill the on-board gas tanks in turn. When the air pressure in the on-board gas tank is balanced with the air pressure in the current filling gas tank, or the air pressure in the on-board gas tank reaches the switching threshold of the gas tank, the system will switch to the next level of gas tank to continue filling. At the same time, the air compressor of the hydrogen refueling station will replenish the high-pressure, medium-pressure, and low-pressure gas tanks in turn to maintain the pressure level in each level of gas tanks.

[0004] The existing technology has failed to take into account a problem. In the scenario where continuous vehicles are queuing for hydrogen refueling, this traditional gas storage control method has a technical problem. Since the medium-pressure gas tank has not been refilled in time after being used by the previous vehicle, the onboard gas tank of the next vehicle will reach pressure balance with the medium-pressure gas tank at a faster speed and still at a lower pressure. When it is necessary to switch to the high-pressure gas tank for filling, since the air compressor has been refilling the high-pressure gas tank, and the medium-pressure gas tank has undergone a continuous process of deflation to the onboard gas tank, its pressure continues to decrease, resulting in a large pressure difference between the medium-pressure gas tank and the high-pressure gas tank. If the gas tank is switched directly in this state, the large pressure difference will trigger an air hammer effect, causing the gas gun to shake, causing wear on the gas gun interface, and may even cause the gas gun to accidentally detach from the onboard gas tank, causing a safety accident. Summary of the invention

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a gas storage control method and system, which can more safely store hydrogen in a vehicle-mounted gas tank.

[0006] In a first aspect, the present application provides a gas storage control method, comprising: using a low-pressure gas tank, a medium-pressure gas tank, and a high-pressure gas tank in sequence to replenish gas in a vehicle-mounted gas tank; When the air pressure in the vehicle-mounted gas tank is balanced with the air pressure in the gas tank that inflates the vehicle-mounted gas tank or the air pressure in the vehicle-mounted gas tank reaches the switching threshold of the gas tank, switch to the gas tank with higher air pressure to refill the vehicle-mounted gas tank; The hydrogen storage room uses air compressors to replenish the high-pressure gas tank, medium-pressure gas tank and low-pressure gas tank in turn; The following steps are also included: When the air pressure of the vehicle-mounted gas tank and the medium-pressure gas tank is balanced, obtaining a first air pressure, where the first air pressure is the current air pressure of the medium-pressure gas tank; At the same time, obtain the current air pressure of the high-pressure gas tank and set it as the second air pressure; According to the pressure difference between the first air pressure and the second air pressure, the risk value of switching from the medium-pressure gas tank to the high-pressure gas tank is calculated by a preset risk value calculation function. If the risk value is greater than a preset risk threshold, the following steps are performed: Stop the hydrogen storage chamber from using the air compressor to pressurize the high-pressure gas tank, and enable the hydrogen storage chamber to use the air compressor to pressurize the medium-pressure gas tank until the gas pressure in the medium-pressure gas tank reaches the medium-pressure switching threshold, and then trigger the medium-pressure gas tank to switch to the high-pressure gas tank to replenish gas to the on-board gas tank, so as to reduce the risk value of subsequent vehicles switching from medium-pressure gas tanks to high-pressure gas tanks, and then enable the hydrogen storage chamber to continue to pressurize the high-pressure gas tank.

[0007] Optionally, the gas storage control method further comprises the following steps: The medium pressure switching threshold of the medium pressure gas tank is set as the medium pressure dynamic switching threshold; The medium voltage dynamic switching threshold is determined by the following steps: At each predetermined time step, the total time consumed by the hydrogen storage chamber to pressurize the medium-pressure gas tank using the air compressor is obtained, which is set as the first time, and the risk value of switching from the medium-pressure gas tank to the high-pressure gas tank is recalculated and set as the first risk value; Obtain the gas pressure of the medium-pressure gas tank in a preset sliding time window to obtain the gas change trend of the medium-pressure gas tank; The first risk value, the first time and the gas change trend of the medium-pressure gas tank are input into the medium-pressure dynamic switching threshold determination function to adjust the medium-pressure switching threshold to obtain the medium-pressure dynamic switching threshold, so that when the first time is less than the preset time tolerance value, the medium-pressure gas tank can be replenished with gas as much as possible, and when the first time is greater than the preset time tolerance value, the medium-pressure gas tank can be switched to the high-pressure gas tank as soon as possible to replenish the vehicle-mounted gas tank while ensuring safety.

[0008] Optionally, the medium voltage dynamic switching threshold determination function is: in, is the medium voltage dynamic switching threshold, A fixed threshold for switching the medium voltage is preset, is the first risk value, is the preset risk threshold, T(t) is the first time, is the preset time tolerance value, is the gas pressure of the medium pressure gas tank at time point t, is the length of the preset sliding time window, is the preset minimum permissible medium voltage switching threshold, and is the preset empirical coefficient; in, > .

[0009] In a second aspect, the present application provides a gas storage control system, comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set are loaded and executed by the processor to implement a gas storage control method as described in any one of the first aspects.

[0010] Compared with the prior art, the technical solution provided by this application has the following advantages: One of its beneficial effects is that, firstly, the present application introduces a risk assessment link in the process of using low-pressure, medium-pressure, and high-pressure gas tanks to replenish the on-board gas tank in sequence. Specifically, when the air pressure of the on-board gas tank and the medium-pressure gas tank reaches equilibrium, the method of the present application will obtain the air pressure of the medium-pressure gas tank at this time as the first air pressure, and at the same time obtain the current air pressure of the high-pressure gas tank as the second air pressure. Then, through a preset risk value calculation function, the risk value of switching from the medium-pressure gas tank to the high-pressure gas tank is calculated based on the pressure difference between the first air pressure and the second air pressure.

[0011] If the calculated risk value exceeds the risk threshold, the method of the present application will start a pressure adjustment process. The specific approach is to suspend the pressurization of the high-pressure gas tank and instead use the air compressor to pressurize the medium-pressure gas tank until the air pressure in the medium-pressure gas tank reaches a specific medium-pressure switching threshold. At this stage, the purpose of the method is to increase the air pressure of the medium-pressure gas tank and specifically reduce the pressure difference between it and the high-pressure gas tank, thereby reducing the risk value to a controllable range. Only after confirming safety will the system restart the switch from the medium-pressure gas tank to the high-pressure gas tank and resume the gas replenishment of the high-pressure gas tank. Therefore, the present application can avoid the shaking of the filling gun due to the excessive pressure difference between the medium-pressure gas tank and the high-pressure gas tank when multiple vehicles are queuing for hydrogen refueling, so that hydrogen can be stored in the vehicle-mounted gas tank more safely.

[0012] Moreover, when multiple vehicles are waiting in line for hydrogen refueling, the control strategy of the present application can improve the refueling experience of subsequent vehicles and the overall efficiency of the system by regulating the refueling process of the current vehicle. This is mainly due to the introduction of a key medium-pressure gas tank reset mechanism in the present application.

[0013] Specifically, when the pressure difference between the medium-pressure gas tank and the high-pressure gas tank is detected to be too large during the process of refueling the current vehicle, triggering a risk warning, the method of the present application will suspend the pressurization of the high-pressure gas tank and instead use the air compressor in the hydrogen storage chamber to pressurize the medium-pressure gas tank. This pressurization process will continue until the air pressure in the medium-pressure gas tank reaches a medium-pressure switching threshold. At this stage, the system actually took advantage of this risk control opportunity to reset the air pressure of the medium-pressure gas tank.

[0014] Although this reset operation may slightly extend the refueling time of the first vehicle, it significantly improves the refueling safety and efficiency of subsequent vehicles. By raising the gas pressure of the medium-pressure gas tank to the switching threshold, the method of the present application substantially reduces the pressure difference between the medium-pressure gas tank and the high-pressure gas tank, returning it to a relatively safe level. This means that after the current vehicle is refueled, the subsequent vehicles will most likely not encounter the problem of excessive pressure difference and excessive risk value again when switching to the high-pressure gas tank for inflation.

[0015] The method provided in this application optimizes the gas storage method from a global perspective. It does not view the refueling process of each vehicle in isolation, but optimizes the entire queuing scenario as a system. By seizing the opportunity of risk control to regulate and reset the system state, the method of this application achieves an effect of managing the front vehicle and benefiting the rear vehicle. This effect not only ensures the refueling safety of each vehicle, but also improves the operating efficiency of the entire hydrogen refueling station by reducing the frequency of risk events.

[0016] The second beneficial effect is that the medium-pressure switching threshold should not be set to a fixed value. If this fixed threshold is set too high, when encountering a vehicle with a large on-board gas tank capacity, it will take longer to fill the medium-pressure gas tank to the switching threshold. During this period, even if the conditions for switching to a high-pressure gas tank for rapid inflation are met, the system cannot switch in time, resulting in the current vehicle's refueling speed still not being fast enough. On the contrary, if the fixed threshold is set too low, although the medium-pressure gas tank can be switched to the high-pressure gas tank in time, when inflating the next vehicle, due to the low gas pressure level of the medium-pressure gas tank, it is likely to trigger the risk warning again. This requires the system to repeat the risk avoidance pressure adjustment steps, and it is impossible to directly implement the switch from medium pressure to high pressure according to the normal process. Such frequent risk events and pressure adjustment operations will not only prolong the refueling time of a single vehicle, but also reduce the operating efficiency of the entire hydrogen refueling station.

[0017] In response to the above problems, this application adopts a dynamic threshold optimization strategy. This strategy calculates a medium-pressure dynamic switching threshold in real time based on parameters such as the first risk value, the first time, and the gas change trend of the medium-pressure gas tank. When the system determines that the risk is controllable and there is still room for improvement, the dynamic threshold will be appropriately increased to extend the medium-pressure inflation time and improve gas utilization; when the system detects that the inflation time is too long, the dynamic threshold will be lowered while ensuring safety to ensure a safe and efficient switch to the high-pressure inflation stage.

[0018] Through this dynamic adjustment mechanism, the control strategy of this application overcomes the defects of fixed thresholds. It enables the system to autonomously optimize control decisions according to actual conditions and seek the best balance between safety and efficiency. On the one hand, the increase in the dynamic threshold can reset the medium-pressure gas tank to the maximum extent and improve the overall efficiency; on the other hand, the reduction in the dynamic threshold can increase the current vehicle's inflation speed as quickly as possible while effectively controlling the risks.

[0019] The third beneficial effect is that the present application proposes a medium voltage dynamic threshold determination function. The function achieves dynamic optimization of the medium voltage switching threshold through the following mechanism: First, the function introduces the concept of risk threshold. When the real-time risk value exceeds the risk threshold, the system will prohibit the adjustment of the switching threshold of the medium-pressure gas tank. This hard constraint ensures that in high-risk situations, the problem of the inflation gun shaking caused by the medium-pressure gas tank switching to the high-pressure gas tank under the condition of a large pressure difference is avoided due to the decrease of the switching threshold of the medium-pressure gas tank.

[0020] Secondly, the function quantifies the time cost of the boosting process through a time integral term. When the actual boosting time exceeds the preset time tolerance value, the function will impose a negative adjustment on the switching threshold to lower the switching threshold of the medium-pressure gas tank, prompting it to switch to the high-pressure gas tank as soon as possible to inflate the on-board gas tank.

[0021] Third, the function sets an integral term of the pressure change rate to dynamically evaluate the saturation state of the medium-pressure gas tank. Specifically, when the pressure of the medium-pressure gas tank increases over time, the pressure change rate When it remains at a large positive value, it means that the air tank is inflating efficiently and there is room for further inflation. In this case, multiply the pressure change rate by the weight coefficient And superimposed on the switching threshold, the switching threshold can be appropriately increased to extend the time of filling the medium-pressure gas tank so as to fill the medium-pressure gas tank as much as possible to reduce the possibility that the next vehicle still has a risk alarm; The pressure increase rate of the intermediate pressure tank gradually slows down over time, and the pressure change rate When the absolute value of gradually decreases and approaches zero, it means that the boost pressure of the supercharger is gradually balanced with the air pressure in the medium-pressure gas tank, and the efficiency of continued inflation will drop significantly. At this time, if the switching threshold is not lowered and the medium-pressure inflation time is continued to be extended, the vehicle refueling time will be blindly prolonged and the overall efficiency will be affected. The medium-pressure dynamic threshold switching function provided in this application can identify this situation, because the integral term will give a smaller threshold correction amount at this time, so that the rising amplitude of the switching threshold is reduced or even stopped, thereby timely reducing the contribution of the integral term to a minimum, and making the switching threshold fall back quickly, so as to get out of the inefficient state as soon as possible, thereby switching to the high-pressure gas tank to inflate the vehicle-mounted gas tank faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A flow chart of a gas storage control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, not all of the embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0025] In a first aspect, the present application provides a gas storage control method, comprising: using a low-pressure gas tank, a medium-pressure gas tank, and a high-pressure gas tank in sequence to replenish gas in a vehicle-mounted gas tank; When the air pressure in the vehicle-mounted gas tank is balanced with the air pressure in the gas tank that inflates the vehicle-mounted gas tank or the air pressure in the vehicle-mounted gas tank reaches the switching threshold of the gas tank, switch to the gas tank with higher air pressure to refill the vehicle-mounted gas tank; The hydrogen storage room uses air compressors to replenish the high-pressure gas tank, medium-pressure gas tank and low-pressure gas tank in turn; The following steps are also included: S101: When the air pressure of the vehicle-mounted gas tank and the medium-pressure gas tank is balanced, obtaining a first air pressure, where the first air pressure is the current air pressure of the medium-pressure gas tank; At the same time, the current air pressure of the high-pressure gas tank is obtained and set as the second air pressure.

[0026] Specifically, the first air pressure and the second air pressure used in this embodiment can be directly called and obtained from the inflation management system, and the data of the inflation management system is obtained through the sensor.

[0027] S102: Calculate the risk value of switching from the medium-pressure gas tank to the high-pressure gas tank according to the pressure difference between the first gas pressure and the second gas pressure by using a preset risk value calculation function.

[0028] Specifically, the preset risk value calculation function is: in, It is a preset pressure difference sensitivity coefficient. is the first air pressure, is the second air pressure, It is a manually preset pressure difference safety threshold.

[0029] The risk value calculation function is not limited to the risk value calculation function provided in the embodiment of the present application. Its setting rules only need to satisfy the rule that the greater the pressure difference between the first air pressure and the second air pressure, the higher the risk value, and set the formula to correspond to the appropriate risk threshold.

[0030] S103: If the risk value is greater than a preset risk threshold, the following steps are performed: Stop the hydrogen storage chamber from using the air compressor to pressurize the high-pressure gas tank, and enable the hydrogen storage chamber to use the air compressor to pressurize the medium-pressure gas tank until the gas pressure in the medium-pressure gas tank reaches the medium-pressure switching threshold, and then trigger the medium-pressure gas tank to switch to the high-pressure gas tank to replenish gas to the on-board gas tank, so as to reduce the risk value of subsequent vehicles switching from medium-pressure gas tanks to high-pressure gas tanks, and then enable the hydrogen storage chamber to continue to pressurize the high-pressure gas tank.

[0031] Specifically, in the embodiment of the present application, the gas storage control method further includes the following steps: The medium pressure switching threshold of the medium pressure gas tank is set as the medium pressure dynamic switching threshold; The medium voltage dynamic switching threshold is determined by the following steps: At each predetermined time step, the total time consumed by the hydrogen storage chamber to pressurize the medium-pressure gas tank using the air compressor is obtained, which is set as the first time, and the risk value of switching from the medium-pressure gas tank to the high-pressure gas tank is recalculated and set as the first risk value; The predetermined time step is 1-10S.

[0032] Obtain the gas pressure of the medium-pressure gas tank in a preset sliding time window to obtain the gas change trend of the medium-pressure gas tank, that is, a matrix composed of data of the preset sliding time window; The length of the sliding time window is generally 5, and it generally needs to be associated with a predetermined time step. If the predetermined time step is 1, that is, the length of the preset sliding time window is 5 seconds, the data therein is the gas pressure of the medium-pressure gas tank every second.

[0033] The first risk value, the first time and the gas change trend of the medium-pressure gas tank are input into the medium-pressure dynamic switching threshold determination function to adjust the medium-pressure switching threshold to obtain the medium-pressure dynamic switching threshold, so that when the first time is less than the preset time tolerance value, the medium-pressure gas tank can be replenished with gas as much as possible, and when the first time is greater than the preset time tolerance value, the medium-pressure gas tank can be switched to the high-pressure gas tank as soon as possible to replenish the vehicle-mounted gas tank while ensuring safety.

[0034] Specifically, the preset time tolerance value is a manually preset value, which indicates the longest acceptable boost time. If the tolerance value is exceeded for the first time, the system will tend to lower the switching threshold of the medium-pressure gas tank to speed up the process of switching to the high-pressure gas tank.

[0035] Specifically, the medium voltage dynamic switching threshold determination function is: in, is the medium voltage dynamic switching threshold, A fixed threshold for switching the medium voltage is preset, is the first risk value, is the preset risk threshold, T(t) is the first time, is the preset time tolerance value, is the gas pressure of the medium pressure gas tank at time point t, is the length of the preset sliding time window, is the preset minimum permissible medium voltage switching threshold, and is the preset empirical coefficient; in, > .

[0036] Specifically, the fixed threshold for medium-pressure switching is generally obtained under ideal conditions without adjustment. The critical pressure point for medium-pressure gas tanks to switch to high-pressure gas tanks is determined by comprehensive consideration of the current design pressures and safety margins of medium-pressure gas tanks and high-pressure gas tanks. The risk threshold is a manually preset value. The air pressure of the medium-pressure gas tank at time point t can also be directly read from the inflation management system. The preset minimum allowable medium-pressure switching threshold is generally taken as The percentage value, in the embodiment of the present application, is 0.8 .

[0037] In summary, the working principle and beneficial effects of this application are discussed as follows: One of its beneficial effects is that, firstly, the present application introduces a risk assessment link in the process of using low-pressure, medium-pressure, and high-pressure gas tanks to replenish the on-board gas tank in sequence. Specifically, when the air pressure of the on-board gas tank and the medium-pressure gas tank reaches equilibrium, the method of the present application will obtain the air pressure of the medium-pressure gas tank at this time as the first air pressure, and at the same time obtain the current air pressure of the high-pressure gas tank as the second air pressure. Then, through a preset risk value calculation function, the risk value of switching from the medium-pressure gas tank to the high-pressure gas tank is calculated based on the pressure difference between the first air pressure and the second air pressure.

[0038] If the calculated risk value exceeds the risk threshold, the method of the present application will start a pressure adjustment process. The specific approach is to suspend the pressurization of the high-pressure gas tank and instead use the air compressor to pressurize the medium-pressure gas tank until the air pressure in the medium-pressure gas tank reaches a specific medium-pressure switching threshold. At this stage, the purpose of the method is to increase the air pressure of the medium-pressure gas tank and specifically reduce the pressure difference between it and the high-pressure gas tank, thereby reducing the risk value to a controllable range. Only after confirming safety will the system restart the switch from the medium-pressure gas tank to the high-pressure gas tank and resume the gas replenishment of the high-pressure gas tank. Therefore, the present application can avoid the shaking of the filling gun due to the excessive pressure difference between the medium-pressure gas tank and the high-pressure gas tank when multiple vehicles are queuing for hydrogen refueling, so that hydrogen can be stored in the vehicle-mounted gas tank more safely.

[0039] Moreover, when multiple vehicles are waiting in line for hydrogen refueling, the control strategy of the present application can improve the refueling experience of subsequent vehicles and the overall efficiency of the system by regulating the refueling process of the current vehicle. This is mainly due to the introduction of a key medium-pressure gas tank reset mechanism in the present application.

[0040] Specifically, when the pressure difference between the medium-pressure gas tank and the high-pressure gas tank is detected to be too large during the process of refueling the current vehicle, triggering a risk warning, the method of the present application will suspend the pressurization of the high-pressure gas tank and instead use the air compressor in the hydrogen storage chamber to pressurize the medium-pressure gas tank. This pressurization process will continue until the air pressure in the medium-pressure gas tank reaches a medium-pressure switching threshold. At this stage, the system actually took advantage of this risk control opportunity to reset the air pressure level of the medium-pressure gas tank.

[0041] Although this reset operation may slightly extend the refueling time of the first vehicle, it significantly improves the refueling safety and efficiency of subsequent vehicles. By raising the gas pressure of the medium-pressure gas tank to the switching threshold, the method of the present application substantially reduces the pressure difference between the medium-pressure gas tank and the high-pressure gas tank, returning it to a relatively safe level. This means that after the current vehicle is refueled, the subsequent vehicles will most likely not encounter the problem of excessive pressure difference and excessive risk value again when switching to the high-pressure gas tank for inflation.

[0042] The method provided in this application optimizes the gas storage method from a global perspective. It does not view the refueling process of each vehicle in isolation, but optimizes the entire queuing scenario as a system. By seizing the opportunity of risk control to regulate and reset the system state, the method of this application achieves an effect of managing the front vehicle and benefiting the rear vehicle. This effect not only ensures the refueling safety of each vehicle, but also improves the operating efficiency of the entire hydrogen refueling station by reducing the frequency of risk events.

[0043] The second beneficial effect is that the medium-pressure switching threshold should not be set to a fixed value. If this fixed threshold is set too high, when encountering a vehicle with a large on-board gas tank capacity, it will take longer to fill the medium-pressure gas tank to the switching threshold. During this period, even if the conditions for switching to a high-pressure gas tank for rapid inflation are met, the system cannot switch in time, resulting in the current vehicle's refueling speed still not being fast enough. On the contrary, if the fixed threshold is set too low, although the medium-pressure gas tank can be switched to the high-pressure gas tank in time, when inflating the next vehicle, due to the low gas pressure level of the medium-pressure gas tank, it is likely to trigger the risk warning again. This requires the system to repeat the risk avoidance pressure adjustment steps, and it is impossible to directly implement the switch from medium pressure to high pressure according to the normal process. Such frequent risk events and pressure adjustment operations will not only prolong the refueling time of a single vehicle, but also reduce the operating efficiency of the entire hydrogen refueling station.

[0044] In response to the above problems, this application adopts a dynamic threshold optimization strategy. This strategy calculates a medium-pressure dynamic switching threshold in real time based on parameters such as the first risk value, the first time, and the gas change trend of the medium-pressure gas tank. When the system determines that the risk is controllable and there is still room for improvement, the dynamic threshold will be appropriately increased to extend the medium-pressure inflation time and improve gas utilization; when the system detects that the inflation time is too long, the dynamic threshold will be lowered while ensuring safety to ensure a safe and efficient switch to the high-pressure inflation stage.

[0045] Through this dynamic adjustment mechanism, the control strategy of this application overcomes the defects of fixed thresholds. It enables the system to autonomously optimize control decisions according to actual conditions and seek the best balance between safety and efficiency. On the one hand, the increase in the dynamic threshold can reset the medium-pressure gas tank to the maximum extent and improve the overall efficiency; on the other hand, the reduction in the dynamic threshold can increase the current vehicle's inflation speed as quickly as possible while effectively controlling the risks.

[0046] The third beneficial effect is that the present application proposes a medium voltage dynamic threshold determination function. The function achieves dynamic optimization of the medium voltage switching threshold through the following mechanism: First, the function introduces the concept of risk threshold. When the real-time risk value exceeds the risk threshold, the system will prohibit the adjustment of the switching threshold of the medium-pressure gas tank. This hard constraint ensures that in high-risk situations, the problem of the inflation gun shaking caused by the medium-pressure gas tank switching to the high-pressure gas tank under the condition of a large pressure difference is avoided due to the decrease of the switching threshold of the medium-pressure gas tank.

[0047] Secondly, the function quantifies the time cost of the boosting process through a time integral term. When the actual boosting time exceeds the preset time tolerance value, the function will impose a negative adjustment on the switching threshold to lower the switching threshold of the medium-pressure gas tank, prompting it to switch to the high-pressure gas tank as soon as possible to inflate the on-board gas tank.

[0048] Third, the function sets an integral term of the pressure change rate to dynamically evaluate the saturation state of the medium-pressure gas tank. Specifically, when the pressure of the medium-pressure gas tank increases over time, the pressure change rate When it remains at a large positive value, it means that the air tank is inflating efficiently and there is room for further inflation. In this case, multiply the pressure change rate by the weight coefficient And superimposed on the switching threshold, the switching threshold can be appropriately increased to extend the time of filling the medium-pressure gas tank so as to fill the medium-pressure gas tank as much as possible to reduce the possibility that the next vehicle still has a risk alarm; The pressure increase rate of the intermediate pressure tank gradually slows down over time, and the pressure change rate When the absolute value of gradually decreases and approaches zero, it means that the boost pressure of the supercharger is gradually balanced with the air pressure in the medium-pressure gas tank, and the efficiency of continued inflation will drop significantly. At this time, if the switching threshold is not lowered and the medium-pressure inflation time is continued to be extended, the vehicle refueling time will be blindly prolonged and the overall efficiency will be affected. The medium-pressure dynamic threshold switching function provided in this application can identify this situation, because the integral term will give a smaller threshold correction amount at this time, so that the rising amplitude of the switching threshold is reduced or even stopped, and the contribution of the integral term is timely reduced to a minimum, so that the switching threshold drops quickly, so as to get out of the inefficient state as soon as possible, thereby switching to the high-pressure gas tank to inflate the vehicle-mounted gas tank faster.

[0049] A gas storage control system comprises a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set are loaded and executed by the processor to implement a gas storage control method as described in any of the above embodiments.

[0050] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In addition, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements. Moreover, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can represent A or B; "and / or" in this article is only a kind of association relationship describing the associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. Furthermore, in the description of the embodiments of the present application, “plurality” refers to two or more than two.

[0051] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas storage control method, comprising: Use low-pressure gas tanks, medium-pressure gas tanks and high-pressure gas tanks in sequence to refill the vehicle-mounted gas tank; When the air pressure in the vehicle-mounted gas tank is balanced with the air pressure in the gas tank that inflates the vehicle-mounted gas tank or the air pressure in the vehicle-mounted gas tank reaches the switching threshold of the gas tank, switch to the gas tank with higher air pressure to refill the vehicle-mounted gas tank; The hydrogen storage room uses air compressors to replenish the high-pressure gas tank, medium-pressure gas tank and low-pressure gas tank in turn; It is characterized in that it also includes the following steps: When the air pressure of the vehicle-mounted gas tank and the medium-pressure gas tank is balanced, obtaining a first air pressure, where the first air pressure is the current air pressure of the medium-pressure gas tank; At the same time, obtain the current air pressure of the high-pressure gas tank and set it as the second air pressure; According to the pressure difference between the first air pressure and the second air pressure, the risk value of switching from the medium-pressure gas tank to the high-pressure gas tank is calculated by a preset risk value calculation function. If the risk value is greater than a preset risk threshold, the following steps are performed: Stop the hydrogen storage chamber from using the air compressor to pressurize the high-pressure gas tank, and enable the hydrogen storage chamber to use the air compressor to pressurize the medium-pressure gas tank until the gas pressure in the medium-pressure gas tank reaches the medium-pressure switching threshold, and then trigger the medium-pressure gas tank to switch to the high-pressure gas tank to replenish gas to the on-board gas tank, so as to reduce the risk value of subsequent vehicles switching from medium-pressure gas tanks to high-pressure gas tanks, and then enable the hydrogen storage chamber to continue to pressurize the high-pressure gas tank.

2. The gas storage control method according to claim 1, characterized in that: The gas storage control method further comprises the following steps: The medium pressure switching threshold of the medium pressure gas tank is set as the medium pressure dynamic switching threshold; The medium voltage dynamic switching threshold is determined by the following steps: At each predetermined time step, the total time consumed by the hydrogen storage chamber to pressurize the medium-pressure gas tank using the air compressor is obtained, which is set as the first time, and the risk value of switching from the medium-pressure gas tank to the high-pressure gas tank is recalculated and set as the first risk value; Obtain the gas pressure of the medium-pressure gas tank in a preset sliding time window to obtain the gas change trend of the medium-pressure gas tank; The first risk value, the first time and the gas change trend of the medium-pressure gas tank are input into the medium-pressure dynamic switching threshold determination function to adjust the medium-pressure switching threshold to obtain the medium-pressure dynamic switching threshold, so that when the first time is less than the preset time tolerance value, the medium-pressure gas tank can be replenished with gas as much as possible, and when the first time is greater than the preset time tolerance value, the medium-pressure gas tank can be switched to the high-pressure gas tank as soon as possible to replenish the vehicle-mounted gas tank while ensuring safety.

3. The gas storage control method according to claim 2, characterized in that: The medium voltage dynamic switching threshold determination function is: in, is the medium voltage dynamic switching threshold, A fixed threshold for switching the medium voltage is preset, is the first risk value, is the preset risk threshold, T(t) is the first time, is the preset time tolerance value, is the gas pressure of the medium pressure gas tank at time point t, is the length of the preset sliding time window, is the preset minimum permissible medium voltage switching threshold, and is the preset empirical coefficient; in, > .

4. A gas storage control system, characterized in that: It includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the gas storage control method as described in any one of claims 1 to 3.

Images