Hydrogen supply control method, device and system and vehicle

Abstract

The embodiment of the invention provides a hydrogen supply control method, device and system and a vehicle, and relates to the technical field of vehicles. The hydrogen supply control method is applied to the hydrogen fuel cell system and comprises the following steps: acquiring the current equipment temperature of hydrogen storage equipment in the hydrogen fuel cell system; under the condition that the current equipment temperature is lower than a temperature threshold value, the current maximum hydrogen supply flow of the hydrogen storage equipment is determined based on the current equipment temperature, and the temperature threshold value is higher than an ultralow temperature threshold value of the hydrogen storage equipment; and limiting the current output electric power of a fuel cell in the hydrogen fuel cell system based on the current maximum available hydrogen supply flow so as to limit the current hydrogen supply flow of the hydrogen storage equipment to the fuel cell. According to the hydrogen supply control method, device and system and the vehicle provided by the embodiment of the invention, ultralow temperature of the hydrogen storage equipment can be avoided.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a hydrogen supply control method, device, system and vehicle. Background Art

[0002] With the continuous development of new energy technologies, hydrogen-powered vehicles are gradually being used on a large scale. A hydrogen-powered vehicle is a vehicle that uses hydrogen as its energy source and includes a hydrogen fuel cell system. A hydrogen fuel cell system is used to convert hydrogen energy into electrical energy and typically includes a hydrogen storage device and a fuel cell. The hydrogen storage device is used to store hydrogen and provide hydrogen to the fuel cell. The fuel cell is used to convert the chemical energy of hydrogen into electrical energy through an electrochemical reaction. As the hydrogen storage device supplies hydrogen to the fuel cell, the temperature of the hydrogen storage device in the hydrogen storage device decreases. If the temperature of the hydrogen storage device is too low, many problems may arise, such as damage to the hydrogen storage device and cessation of hydrogen supply. Summary of the Invention

[0003] In view of the above problems, embodiments of the present application provide a hydrogen supply control method, device, storage medium and vehicle to overcome the above problems or at least partially solve the above problems.

[0004] In a first aspect, an embodiment of the present application provides a hydrogen supply control method, which is applied to a hydrogen fuel cell system. The method includes: Obtain the current device temperature of the hydrogen storage device in the hydrogen fuel cell system; When the current device temperature is lower than a temperature threshold, determining the current maximum available hydrogen flow rate of the hydrogen storage device based on the current device temperature; wherein the temperature threshold is higher than an ultra-low temperature threshold of the hydrogen storage device; The current output electric power of the fuel cell in the hydrogen fuel cell system is limited based on the current maximum available hydrogen supply flow rate, so as to limit the current hydrogen supply flow rate of the hydrogen storage device to the fuel cell.

[0005] In a second aspect, an embodiment of the present application provides a hydrogen supply control device, which is applied to a hydrogen fuel cell system. The device includes: An acquisition module is used to obtain the current device temperature of the hydrogen storage device in the hydrogen fuel cell system; a flow rate determination module, configured to determine a current maximum flow rate of hydrogen available for the hydrogen storage device based on the current device temperature when the current device temperature is lower than a temperature threshold; wherein the temperature threshold is higher than an ultra-low temperature threshold of the hydrogen storage device; A flow limiting module is used to limit the current output electric power of the fuel cell in the hydrogen fuel cell system based on the current maximum available hydrogen supply flow, so as to limit the current hydrogen supply flow of the hydrogen storage device to the fuel cell.

[0006] In a third aspect, an embodiment of the present application provides a hydrogen fuel cell system for executing the above-mentioned hydrogen supply control method.

[0007] In a fourth aspect, an embodiment of the present application provides a hydrogen vehicle comprising the above-mentioned hydrogen fuel cell system.

[0008] The above-mentioned technical solution provided in the embodiment of the present application obtains the current device temperature of the hydrogen storage device. When the current device temperature is lower than the temperature threshold, the current maximum available hydrogen flow rate of the hydrogen storage device is determined based on the current device temperature. The current output electric power of the fuel cell is limited based on the current maximum available hydrogen supply flow rate, so as to limit the current hydrogen supply flow rate of the hydrogen storage device to the fuel cell, thereby avoiding the hydrogen storage device temperature from being too low and preventing the hydrogen storage device from being damaged.

[0009] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings: Figure 1 is a flow chart of a hydrogen supply control method provided in some embodiments of the present application; Figure 2 is a schematic diagram of the system structure of a hydrogen vehicle provided by some embodiments of the present application; FIG3 is a schematic structural diagram of a hydrogen fuel cell system provided in some embodiments of the present application; Figure 4 is a schematic diagram of an interactive flow of a hydrogen supply control method provided in some embodiments of the present application; Figure 5 This is a module schematic diagram of the hydrogen supply control device provided in some embodiments of the present application. DETAILED DESCRIPTION

[0011] The following describes exemplary embodiments of the present application in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0012] In related technologies, some hydrogen vehicles are hydrogen fuel cell extended-range vehicles (ERVs), which include a hydrogen fuel cell system and a power battery system. The hydrogen fuel cell system converts hydrogen energy into electricity to charge the power batteries in the power battery system. The power battery system uses the electricity stored in the power batteries to drive the vehicle's motor, thereby powering the vehicle.

[0013] In some cases, when the power battery's State of Charge (SOC) is high, such as when the power battery's SOC is above a first charge threshold, the hydrogen fuel cell system does not operate, and the vehicle's electric motor is driven by the power battery. When the power battery's state of charge is moderate, such as when the power battery's SOC is below the first charge threshold and above a second charge threshold, the hydrogen fuel cell system charges the power battery, while the vehicle's electric motor is still driven by the power battery. When the power battery's state of charge is low, such as when the power battery's SOC is below a second charge threshold, the vehicle's electric motor is driven by the fuel cell, and the hydrogen fuel cell system needs to simultaneously charge the power battery and drive the vehicle's electric motor. The second charge threshold is lower than the first charge threshold.

[0014] A hydrogen fuel cell system typically includes a hydrogen storage device and a fuel cell. The fuel cell is used to convert the chemical energy of hydrogen into electrical energy through an electrochemical reaction, and the hydrogen storage device is used to provide hydrogen to the fuel cell. In some cases, the hydrogen storage device passively supplies hydrogen to the fuel cell. The hydrogen supply flow rate of the hydrogen storage device to the fuel cell is determined by the output electrical power of the fuel cell, and the hydrogen supply flow rate of the hydrogen storage device changes with the output electrical power of the fuel cell. When the hydrogen fuel cell system simultaneously charges the power battery and drives the vehicle motor, the output electrical power of the fuel cell will increase sharply, and the hydrogen supply flow rate of the hydrogen storage device to the fuel cell will also increase sharply. The sharp increase in the hydrogen supply flow rate will cause the temperature inside the hydrogen storage device to drop rapidly, resulting in ultra-low temperatures. Ultra-low temperatures in hydrogen storage devices can cause a series of problems, such as damage to materials inside the hydrogen storage device and cessation of hydrogen supply.

[0015] To this end, an embodiment of the present application provides a hydrogen supply control method, which is used in the above-mentioned hydrogen fuel cell system. The method can control the hydrogen supply flow rate from the hydrogen storage device to the fuel cell in the above-mentioned hydrogen fuel cell system, thereby avoiding ultra-low temperatures in the hydrogen storage device and avoiding problems such as damage to the hydrogen storage device materials and cessation of hydrogen supply caused by ultra-low temperatures in the hydrogen storage device.

[0016] Figure 1 It is a flow chart of the hydrogen supply control method provided in some embodiments of the present application. Figure 1 The method shown can be used in the above hydrogen fuel cell system, and is periodically executed by the above hydrogen fuel cell system to periodically control the hydrogen flow rate supplied by the hydrogen storage device to the fuel cell. In each control cycle, the hydrogen fuel cell system can execute Figure 1The processing S102 to S106 is shown. Figure 1 As shown, in some embodiments of the present application, the hydrogen supply control method includes: S102, obtaining the current device temperature of the hydrogen storage device in the hydrogen fuel cell system.

[0017] The device temperature of the hydrogen storage device is the internal temperature of the hydrogen storage device, which can be obtained by sampling the internal temperature of the hydrogen storage device. The current device temperature of the hydrogen storage device can be the device temperature obtained by sampling the internal temperature of the hydrogen storage device in the current control cycle.

[0018] S104: When the current device temperature is lower than a temperature threshold, determine the current maximum available hydrogen flow rate of the hydrogen storage device based on the current device temperature.

[0019] The temperature threshold is the threshold for hydrogen flow control, which is, for example, The temperature threshold is higher than the ultra-low temperature threshold. The ultra-low temperature threshold is the critical temperature threshold at which the hydrogen storage equipment may experience material damage, hydrogen supply cessation, and other problems. .

[0020] The current maximum hydrogen supply flow is the critical hydrogen supply flow corresponding to the current device temperature. The critical hydrogen supply flow reduces the device temperature of the hydrogen storage device from the current device temperature to the critical temperature within the control interval of the hydrogen supply flow. The critical temperature Ultra-low temperature threshold. If the hydrogen supply flow rate of the hydrogen storage device is less than the current maximum hydrogen supply flow rate, the temperature of the hydrogen storage device will not drop from the current device temperature to the ultra-low temperature threshold within the hydrogen supply flow control interval, and the hydrogen storage device will not produce ultra-low temperatures.

[0021] Among them, the control interval of the hydrogen supply flow is the time interval for periodically controlling the hydrogen supply flow. For example, the time interval between the second execution of processing S106 to limit the hydrogen supply flow and the first execution of processing S106 to limit the hydrogen supply flow can be equal to the time interval between two adjacent cycles when the hydrogen supply control method of an embodiment of the present application is periodically executed, that is, the cycle interval.

[0022] S106: limiting the current output power of the fuel cell in the hydrogen fuel cell system based on the current maximum hydrogen supply flow rate, so as to limit the current hydrogen supply flow rate of the hydrogen storage device to the fuel cell.

[0023] The hydrogen storage device passively supplies hydrogen to the fuel cell, with the hydrogen supply flow rate varying with the fuel cell's output power. When the fuel cell's output power is limited, the hydrogen supply flow rate is also limited. The fuel cell's current output power can be limited to a value lower than or equal to the current maximum available power output corresponding to the current maximum available hydrogen flow rate, thereby limiting the current hydrogen supply flow rate to a value lower than or equal to the current maximum available hydrogen flow rate to prevent the hydrogen storage device from freezing.

[0024] In the above embodiment, by obtaining the current device temperature of the hydrogen storage device in the hydrogen fuel cell system, when the current device temperature is lower than the temperature threshold, the temperature threshold is higher than the ultra-low temperature threshold of the hydrogen storage device, and the current maximum hydrogen flow rate that the hydrogen storage device can supply to the fuel cell in the hydrogen fuel cell system is determined based on the current device temperature. The current output electrical power of the fuel cell is limited based on the current maximum hydrogen flow rate, so as to limit the current hydrogen flow rate supplied by the hydrogen storage device to the fuel cell. This can prevent the hydrogen storage device from being ultra-low temperature in advance, and avoid problems such as damage to the hydrogen storage device and cessation of hydrogen supply.

[0025] In the above embodiments, the hydrogen storage device is a device for storing hydrogen. In different application scenarios, the hydrogen storage device may have different structures. In some embodiments, the hydrogen storage device may include a hydrogen storage cylinder. The number of hydrogen storage cylinders may be one or more.

[0026] When there is only one hydrogen storage cylinder in the hydrogen storage device, in the above process S102, the current device temperature of the hydrogen storage device is obtained, which can be specifically: obtaining the current internal temperature of the hydrogen storage cylinder in the hydrogen storage device, and determining the current internal temperature of the hydrogen storage cylinder as the current device temperature of the hydrogen storage device.

[0027] In the case where there are multiple hydrogen storage cylinders in the hydrogen storage device, in the above process S102, the current device temperature of the hydrogen storage device is obtained, which can be specifically: obtaining the current internal temperature of each hydrogen storage cylinder in the hydrogen storage device; determining the lowest internal temperature based on the current internal temperature of each hydrogen storage cylinder; and determining the lowest internal temperature as the current device temperature of the hydrogen storage device.

[0028] The lowest internal temperature is the lowest current internal temperature of all hydrogen storage cylinders in the hydrogen storage device.

[0029] For example, if there are three hydrogen storage cylinders in the hydrogen storage device, the current internal temperature of hydrogen storage cylinder 1 is temperature 1, the current internal temperature of hydrogen storage cylinder 2 is temperature 2, and the current internal temperature of hydrogen storage cylinder 3 is temperature 3. Temperature 1>Temperature 2>Temperature 3, and Temperature 3 is the lowest. Temperature 3 can be determined as the current device temperature of the hydrogen storage device.

[0030] In implementation, the current internal temperature of the hydrogen storage cylinder can be obtained through appropriate means.

[0031] For example, a temperature sensor may be integrated into the mouth valve of the hydrogen storage cylinder, and the current temperature inside the hydrogen storage cylinder may be acquired through the temperature sensor integrated at the mouth valve of the hydrogen storage cylinder.

[0032] In the above embodiment, by determining the current maximum available hydrogen flow rate that prevents the current device temperature of the hydrogen storage device from dropping below the low-temperature threshold within the hydrogen supply flow control interval, the current output power of the fuel cell is limited based on the current maximum available hydrogen flow rate of the hydrogen storage device, thereby limiting the hydrogen supply flow rate. This ensures that the device temperature of the hydrogen storage device does not drop below the ultra-low-temperature threshold within the hydrogen supply flow control interval, thereby ensuring that the device temperature of the hydrogen storage device does not reach ultra-low temperatures. The current maximum available hydrogen flow rate can be determined using an appropriate method. In the above process S104, determining the current maximum available hydrogen flow rate based on the current device temperature can be performed using an appropriate method.

[0033] In some embodiments, the current maximum available hydrogen flow rate can be determined based on the current device temperature and a mapping relationship between the device temperature and the maximum available hydrogen flow rate. The mapping relationship between the device temperature and the maximum available hydrogen flow rate can be obtained by testing in a test environment.

[0034] In some embodiments, a first mapping model may be established based on a mapping relationship between device temperature and maximum available hydrogen flow rate, and a current maximum available hydrogen flow rate corresponding to the current device temperature may be determined based on the current device temperature and the first mapping model.

[0035] The first mapping model is used to map the device temperature to the maximum available hydrogen flow rate. The current device temperature can be substituted into the first mapping model, and the maximum available hydrogen flow rate output by the first mapping model is the current maximum available hydrogen flow rate corresponding to the current device temperature.

[0036] The first mapping model can be modeled based on the mapping relationship between the device temperature and the maximum available hydrogen flow rate obtained from the test.

[0037] For example, multiple device test temperatures can be determined, and under a test environment, the maximum available hydrogen flow rate corresponding to each device test temperature can be measured to obtain the maximum available hydrogen flow rate for each device test temperature. Then, the multiple device test temperatures and the multiple maximum available hydrogen flow rates corresponding to the multiple device test temperatures can be fitted to obtain the first mapping model. The multiple device test temperatures correspond one-to-one to the multiple maximum available hydrogen flow rates for testing, with each device test temperature corresponding to one maximum available hydrogen flow rate for testing.

[0038] For example, multiple device test temperatures and the maximum test available hydrogen flow corresponding to each device test temperature can be obtained in a test environment, and an artificial intelligence model can be trained based on the multiple device test temperatures and the maximum test available hydrogen flow corresponding to each device test temperature to obtain the above-mentioned first mapping model.

[0039] In some embodiments, a first available hydrogen flow mapping table can be established based on the mapping relationship between device temperature and maximum available hydrogen flow, the first available hydrogen flow mapping table can be queried based on the current device temperature, and the current maximum available hydrogen flow can be determined based on the query result.

[0040] The first available hydrogen flow mapping table is a mapping table of device temperature and maximum available hydrogen flow, which stores a mapping relationship between device temperature and maximum available hydrogen flow. The mapping relationship between device temperature and maximum available hydrogen flow in the maximum available hydrogen flow mapping table can be obtained by testing in a test environment.

[0041] For example, the first available hydrogen flow mapping table may be:

[0042] The first available hydrogen flow mapping table can be queried based on the current device temperature to obtain the maximum available hydrogen flow corresponding to the temperature range to which the current device temperature belongs, and the maximum available hydrogen flow is determined as the current maximum available hydrogen flow corresponding to the current device temperature.

[0043] For example, if the current device temperature is , which belongs to In this temperature range, by querying the above table, we can find that the maximum available hydrogen flow rate corresponding to the current device temperature is 2.7 g / s. 2.7 g / s can be determined as the current maximum available hydrogen flow rate of the hydrogen storage device.

[0044] By testing in a test environment, a mapping relationship between the device temperature and the maximum available hydrogen flow rate of the hydrogen storage device is obtained, and a hydrogen flow rate mapping table is established based on this mapping relationship. After obtaining the current device temperature of the hydrogen storage device, the hydrogen flow rate mapping table is queried based on the current device temperature to determine the current maximum available hydrogen flow rate of the hydrogen storage device. This can simulate a real hydrogen supply environment, more accurately and quickly determine the current maximum available hydrogen flow rate of the hydrogen storage device, and improve the speed and accuracy of obtaining the maximum available hydrogen flow rate.

[0045] In the above embodiment, as the hydrogen storage device continuously supplies hydrogen to the fuel cell, the pressure within the hydrogen storage device, such as the hydrogen storage cylinder, will continuously decrease. If the pressure within the hydrogen storage device is too low, the hydrogen storage device may over-discharge, causing safety issues. Furthermore, the device pressure also affects the device temperature. As the pressure decreases, the temperature of the hydrogen storage device will further decrease.

[0046] In some embodiments, in order to avoid ultra-low temperatures in the hydrogen storage device and to avoid over-discharge of the hydrogen storage device, the current device pressure of the hydrogen storage device can also be obtained before processing S104. In processing S104, the current maximum available hydrogen flow rate of the hydrogen storage device can be determined based on the current device temperature and the current device pressure of the hydrogen storage device when the current device temperature is lower than the temperature threshold.

[0047] Among them, the current maximum hydrogen supply flow is the critical hydrogen supply flow corresponding to the current device temperature and the current device pressure. The critical hydrogen supply flow reduces the device temperature of the hydrogen storage device from the current device temperature to the critical temperature within the hydrogen supply flow control interval, and reduces the device pressure of the hydrogen storage device from the current device pressure to the critical pressure within the hydrogen supply control interval. The critical temperature Ultra-low temperature threshold, critical pressure Over-discharge pressure threshold. If the hydrogen supply flow rate of the hydrogen storage device is less than the current maximum hydrogen supply flow rate, the device temperature of the hydrogen storage device will not drop from the current device temperature to the ultra-low temperature threshold within the hydrogen supply flow control interval, and the device pressure will not drop from the current device pressure to the over-discharge pressure threshold within the hydrogen supply flow control interval. The hydrogen storage device will not be ultra-low temperature, and over-discharge will not occur.

[0048] An appropriate method may be used to determine the current maximum available hydrogen flow rate of the hydrogen storage device based on the current device temperature and the current device pressure of the hydrogen storage device.

[0049] In some embodiments, the current maximum available hydrogen flow rate can be determined based on the current device temperature and a mapping relationship between the device temperature, device pressure, and the maximum available hydrogen flow rate. The mapping relationship between the device temperature, device pressure, and the maximum available hydrogen flow rate can be obtained by testing in a test environment.

[0050] In some embodiments, a second mapping model may be established based on a mapping relationship between device temperature, device pressure, and maximum available hydrogen flow rate. The current maximum available hydrogen flow rate may be determined based on the current device temperature, current device pressure, and the second mapping model.

[0051] The second mapping model is used to map the device temperature and device pressure to the maximum available hydrogen flow rate. The current device temperature and current device pressure can be substituted into the second mapping model, and the maximum available hydrogen flow rate output by the second mapping model is the current maximum available hydrogen flow rate.

[0052] The second mapping model can be modeled based on the mapping relationship between the device temperature, the device pressure, and the maximum test available hydrogen supply flow rate obtained through testing.

[0053] For example, multiple sets of device test temperatures and device test pressures can be determined, and the maximum available hydrogen flow rate corresponding to each set of device test temperature and device test pressure can be tested in a test environment to obtain the maximum test available hydrogen flow rate corresponding to each set of device test temperature and device test pressure. A mapping relationship between the multiple sets of device test temperatures, device test pressures, and maximum test available hydrogen flow rates can be fitted to obtain the aforementioned second mapping model.

[0054] In some embodiments, a second available hydrogen flow mapping table may be established based on a mapping relationship between device temperature, device pressure, and maximum available hydrogen flow. The second available hydrogen flow mapping table may be queried based on the current device temperature and current device pressure, and the current maximum available hydrogen flow may be determined based on the query result.

[0055] The second hydrogen supply flow mapping table is a mapping table of device temperature, device pressure, and maximum available hydrogen supply flow, storing a mapping relationship between device temperature, device pressure, and maximum available hydrogen supply flow. The mapping relationship between device temperature, device pressure, and maximum available hydrogen supply flow can be obtained through testing in a test environment.

[0056] For example, the second hydrogen supply flow mapping table may be:

[0057] The maximum available hydrogen flow rate corresponding to the temperature range to which the current device temperature belongs and the pressure range of the current device pressure can be queried from the above-mentioned second available hydrogen flow rate mapping table, and the queried maximum available hydrogen flow rate is determined as the current maximum available hydrogen flow rate.

[0058] For example, if the current device temperature is , which belongs to In this temperature range, the current device pressure is 3P / Mpa, which belongs to the pressure range of 2P / Mpa ~3.5P / Mpa. By querying the above-mentioned second hydrogen supply flow mapping table, it can be determined that the maximum hydrogen supply flow corresponding to the current device temperature and the current device pressure is 1.35g / s. 1.35g / s can be determined as the current maximum hydrogen supply flow corresponding to the current device temperature and the current device pressure.

[0059] In the above embodiment, when the device pressure is high, the risk of over-discharge is low, and the device pressure has little effect on the maximum available hydrogen flow rate. In some embodiments, to reduce calculation pressure, the current device pressure of the hydrogen storage device can be obtained before processing S104. In processing S104, when the current device temperature is lower than a temperature threshold and the current device pressure is lower than a pressure threshold, the current maximum available hydrogen flow rate can be determined based on the current device temperature and the current device pressure.

[0060] The pressure threshold may be higher than the over-discharge pressure threshold of the hydrogen storage device. The over-discharge pressure threshold is the pressure threshold at which over-discharge occurs, which is, for example, 2P / Mpa. The pressure threshold is higher than the over-discharge pressure threshold, which is, for example, 3.5P / Mpa.

[0061] By setting the pressure threshold to be higher than the over-discharge pressure threshold, when the current device temperature is lower than the temperature threshold and the current device pressure is lower than the pressure threshold, the current maximum hydrogen supply flow rate is determined based on the current device temperature and the current device pressure. This allows the hydrogen supply flow rate of the hydrogen storage device to be controlled in advance based on the device pressure before the pressure of the hydrogen storage device decreases to the over-discharge pressure threshold, thereby avoiding ultra-low temperature of the hydrogen storage device and over-discharge of the hydrogen storage device.

[0062] The current equipment pressure of the hydrogen storage equipment can be obtained through appropriate means.

[0063] When there is only one hydrogen storage cylinder in the hydrogen storage device, the current device pressure of the hydrogen storage device is obtained. Specifically, the current internal pressure of the hydrogen storage cylinder in the hydrogen storage device is obtained, and the current internal pressure of the hydrogen storage cylinder is determined as the current device pressure of the current hydrogen storage device.

[0064] When there are multiple hydrogen storage cylinders in the hydrogen storage device, the hydrogen storage device may further include: a master control valve. Multiple hydrogen storage cylinders can be connected to the master control valve, and hydrogen is uniformly supplied to the fuel cell through the master control valve. Because multiple hydrogen cylinders are connected to the same master control valve, forming a connector, the pressure inside each hydrogen storage cylinder is approximately equal. The current device pressure of the hydrogen storage device is equal to the pressure inside each hydrogen storage cylinder, which is equal to the input pressure of the master control valve. The above-mentioned acquisition of the current device pressure of the hydrogen storage device can specifically be: acquiring the current master control valve pressure of the master control valve in the hydrogen storage device, and determining the current master control valve pressure as the current device pressure of the hydrogen storage device.

[0065] In implementation, the current total control valve pressure can be obtained through an appropriate method. For example, a pressure sensor can be integrated into the total control valve to obtain the current total control valve pressure through the pressure sensor integrated into the total control valve.

[0066] In the above embodiment, the current output power of the fuel cell can be limited by an appropriate method. In process S106, the current output power of the fuel cell is limited based on the current maximum available hydrogen flow rate, and an appropriate method can be used.

[0067] In some embodiments, the current output power of the fuel cell is limited by the current maximum output power of the fuel cell, and the current output power of the fuel cell is less than or equal to the current maximum output power of the fuel cell. The fuel cell passively outputs power based on power demand, and the current specific output power is determined by the vehicle control system, which changes with the current fuel cell power demand of the fuel cell by the vehicle control system. To limit the current output power of the fuel cell, in process S106, the current maximum output power of the fuel cell can be determined based on the current maximum available hydrogen flow rate; the current maximum output power is sent to the vehicle control system, so that the vehicle control system determines the current fuel cell power demand based on the current maximum output power.

[0068] The current fuel cell power demand is the power demanded by the vehicle control system. The fuel cell outputs power at the current fuel cell power demand. The current fuel cell power output is equal to the current fuel cell power demand, and the current fuel cell power demand does not exceed the current maximum output power. Therefore, the current maximum output power of the fuel cell can be determined based on the current maximum available hydrogen flow rate. By limiting the current maximum output power of the fuel cell, the current output power of the fuel cell can be limited.

[0069] An appropriate method may be used to determine the current maximum output power of the fuel cell based on the current maximum available hydrogen flow rate.

[0070] In some embodiments, the current hydrogen flow limit power of the fuel cell can be determined based on the current maximum hydrogen flow available from the hydrogen storage device, and the current maximum output power of the fuel cell can be determined based on the current hydrogen flow limit power of the fuel cell.

[0071] For example, the current hydrogen flow limiting power may be calculated based on the current maximum available hydrogen flow and the physical relationship between the hydrogen flow and the output power, and the current maximum output electrical power may be determined based on the current hydrogen flow limiting power.

[0072] For example, the hydrogen supply flow rate and current density, as well as the current density and output power follow physical laws. Based on the physical relationship between the hydrogen supply flow rate and the current density, the current density corresponding to the current maximum available hydrogen flow rate can be calculated. Based on the physical relationship between the current density and the output power, the output power corresponding to the current density can be calculated. The calculated output power is the current hydrogen flow rate limit power corresponding to the current maximum available hydrogen flow rate.

[0073] In some embodiments, to improve the speed and accuracy of determining the current hydrogen flow limit power, the current hydrogen flow limit power may be determined based on the current maximum available hydrogen flow and a mapping relationship between the maximum available hydrogen flow and the hydrogen flow limit power.

[0074] For example, a hydrogen flow limit power mapping table can be established based on the mapping relationship between the maximum available hydrogen flow and the hydrogen flow limit power. The hydrogen flow limit power mapping table can be queried based on the current maximum available hydrogen flow, and the current hydrogen flow limit power can be determined based on the query result.

[0075] The hydrogen flow rate limiting power mapping table is a mapping table of the maximum available hydrogen flow rate and the hydrogen flow rate limiting power, which stores the mapping relationship between the maximum available hydrogen flow rate and the hydrogen flow rate limiting power. The mapping relationship can be obtained by testing in a test environment.

[0076] By testing in a test environment to obtain the mapping relationship between the maximum available hydrogen flow and the hydrogen flow limit power, a hydrogen flow limit power mapping table is established based on the mapping relationship, and the current hydrogen flow limit power is determined by querying the hydrogen flow limit power mapping table based on the current maximum available hydrogen flow, which can improve the acquisition speed and accuracy of the current hydrogen flow limit power.

[0077] In the above embodiment, the current maximum output power of the fuel cell can be determined solely by the current hydrogen flow limit power of the fuel cell, or can be determined jointly by the current hydrogen flow limit power and the non-hydrogen flow limit power of the fuel cell. Typically, the current hydrogen flow limit power and the non-hydrogen flow limit power are determined jointly. The above determination of the current maximum output power of the fuel cell based on the current hydrogen flow limit power of the fuel cell can be carried out in an appropriate manner.

[0078] In some embodiments, when the current maximum output power of the fuel cell is determined solely by the current hydrogen flow limit power of the fuel cell, the current hydrogen flow limit power of the fuel cell may be determined as the current maximum output power of the fuel cell.

[0079] In some embodiments, when the current maximum output electrical power of the fuel cell is determined by the current hydrogen flow limiting power and the non-hydrogen flow limiting power, the current hydrogen flow limiting power of the fuel cell can be determined based on the current maximum available hydrogen flow, and the current hydrogen flow limiting power is compared with the current non-hydrogen flow limiting power of the fuel cell. If the current hydrogen flow limiting power is less than the current non-hydrogen flow limiting power, the current hydrogen flow limiting power is determined as the current maximum output electrical power of the fuel cell.

[0080] The current non-hydrogen flow rate limiting power is a limiting power determined based on the current non-hydrogen flow rate limiting factors. The current non-hydrogen flow rate limiting factors are other power limiting factors of the fuel cell's current power limiting factors, excluding the current maximum available hydrogen flow rate, which is a power limiting factor. These power limiting factors may be the original power limiting factors of the fuel cell's maximum output power, such as coolant temperature, deionization concentration, accessory pressure, etc.

[0081] In practice, the maximum output power of a fuel cell is limited by a variety of factors. The above method uses the current maximum available hydrogen flow rate as a limiting factor for the fuel cell's maximum output power. This factor, along with other fuel cell power limiting factors, can be used to determine the fuel cell's current maximum available output power. This eliminates the need for extensive changes to the original power limiting logic, allowing for the reuse of existing processing in the vehicle and reducing costs.

[0082] The fuel cell's output power is driven by the vehicle's control system's requirements. The fuel cell's current output power varies with the vehicle's control system's current fuel cell power demand. After determining the fuel cell's maximum output power based on the maximum available hydrogen flow rate, the maximum output power can be transmitted to the vehicle's control system, which then determines the current fuel cell power demand based on the fuel cell's maximum output power.

[0083] The current required electric power of the fuel cell is less than or equal to the current maximum output electric power of the fuel cell.

[0084] Since the current output power of the fuel cell changes based on the current fuel cell power demand of the vehicle control system, the current output power of the fuel cell is equal to the current fuel cell power demand of the vehicle control system. When the current fuel cell power demand is less than or equal to the current maximum output power of the fuel cell, the current output power of the fuel cell is also less than or equal to the current maximum output power of the fuel cell. Since the current maximum output power of the fuel cell is determined based on the current maximum hydrogen flow rate of the fuel cell, when the current output power of the fuel cell is less than or equal to the current maximum output power, the current hydrogen flow rate of the hydrogen storage device to the fuel cell is also less than or equal to the current maximum hydrogen flow rate. Thus, the current output power of the fuel cell can be limited based on the current maximum hydrogen flow rate, thereby limiting the current hydrogen flow rate of the hydrogen storage device.

[0085] The hydrogen supply method provided in the above embodiment can be used in scenarios where a hydrogen storage device passively supplies hydrogen to a fuel cell, and the hydrogen supply flow of the hydrogen storage device is feedback-controlled by the output power of the fuel cell. The above processes S102 to S106 can be performed by a hydrogen fuel cell system.

[0086] In some embodiments, a hydrogen fuel cell system includes a hydrogen storage system and a fuel cell system. The hydrogen storage system includes the aforementioned energy storage device, and the fuel cell system includes the aforementioned fuel cell. The hydrogen storage system can perform the aforementioned processes S102 to S106 to determine the current maximum hydrogen flow rate that the hydrogen storage device can supply to the fuel cell. The fuel cell system can perform the aforementioned process S106 to limit the current output power of the fuel cell. The hydrogen storage system and the fuel cell system work together to implement the hydrogen supply control method provided in the aforementioned embodiments.

[0087] The above-mentioned hydrogen supply control method and hydrogen fuel cell system can be used in hydrogen-powered vehicles. Figure 2 This is a schematic diagram of the system structure of a hydrogen vehicle provided in some embodiments of the present application. Figure 3 This is a schematic structural diagram of a hydrogen fuel cell system provided in some embodiments of the present application. Figure 4 This is a schematic diagram of the interactive flow of the hydrogen supply control method provided in some embodiments of the present application. Figure 2 、 Figure 3 、 Figure 4 , the hydrogen supply control method provided in the embodiment of the present application is further explained.

[0088] like Figure 2 、 Figure 3 As shown, in some embodiments of the present application, a hydrogen vehicle includes: a hydrogen fuel cell system 100, a power battery system 200, and a vehicle control system 300. The hydrogen fuel cell system 100 includes: a hydrogen storage system 110 and a fuel cell system 120, and the power battery system 200 includes a power battery. The hydrogen storage system 110 includes a hydrogen storage device, and the fuel cell system 120 includes a fuel cell.

[0089] In the hydrogen fuel cell system 100 , the hydrogen storage device passively supplies hydrogen to the fuel cell, and the hydrogen supply flow rate varies with the output power of the fuel cell.

[0090] When the power battery's charge level is higher than a second charge threshold, the vehicle's motor is driven by the power battery and the fuel cell charges the power battery. The fuel cell's output power is a first power, and the hydrogen storage device passively supplies hydrogen to the fuel cell at a first hydrogen supply flow rate.

[0091] When the power battery's charge level falls below a second charge threshold, the vehicle's electric motor is driven by the fuel cell, which simultaneously drives the vehicle's electric motor and charges the power battery. The fuel cell's output power is a second power level, and the hydrogen storage device passively supplies hydrogen to the fuel cell at a second hydrogen flow rate. Since the second power level is significantly greater than the first power level, and the second hydrogen flow rate is significantly greater than the first power level, the hydrogen storage device's temperature may drop rapidly, reaching cryogenic temperatures.

[0092] like Figure 4As shown, to prevent the hydrogen storage equipment in the hydrogen fuel cell system from being extremely low in temperature, the hydrogen fuel cell system, power battery system, and vehicle control system can perform the following interactive processing: S401: The hydrogen storage system obtains the current device temperature and current device pressure of the hydrogen storage device.

[0093] In some embodiments, the hydrogen storage device may include multiple hydrogen storage cylinders and a main control valve, and the multiple hydrogen storage cylinders are connected to the main control valve to supply hydrogen to the fuel cell through the main control valve. The main control valve is a mechanical valve, such as a two-way valve, which is used to open or cut off the oxygen supply. The multiple hydrogen storage cylinders passively supply hydrogen to the fuel cell through the main control valve. The hydrogen supply flow rate at the main control valve is the total hydrogen supply flow rate of the multiple hydrogen storage cylinders, that is, the hydrogen supply flow rate of the hydrogen storage device. The size of the total hydrogen supply flow rate is reversely controlled by controlling the current output power of the fuel cell. The multiple hydrogen storage cylinders are approximately formed into a communicating vessel through the main control valve, and the pressure in each hydrogen storage cylinder is approximately equal to the pressure at the main control valve. A temperature sensor is integrated into the bottle mouth valve of each hydrogen storage cylinder, and a pressure sensor is integrated into the main control valve.

[0094] The hydrogen storage system can obtain the current internal temperature of each hydrogen storage cylinder from the temperature sensor integrated into each cylinder valve, and determine the minimum current internal temperature as the current device temperature. The hydrogen storage system can also obtain the current total control valve pressure from the pressure sensor integrated into the total control valve, and determine the current total control valve pressure as the current device pressure.

[0095] S402: The hydrogen storage system determines the current maximum available hydrogen flow rate of the hydrogen storage device based on the current device temperature and the current device pressure.

[0096] Among them, the hydrogen storage system can determine the current maximum available hydrogen flow rate based on the current device temperature when the current device temperature is lower than the temperature threshold and the current device pressure is higher than the pressure threshold; when the current device temperature is lower than the temperature threshold and the current device pressure is lower than the pressure threshold, the hydrogen storage system can determine the current maximum available hydrogen flow rate based on the current device temperature and the current device pressure.

[0097] For example, when the current device temperature is below a threshold and the current device pressure is above a pressure threshold, the hydrogen storage system may query a first available hydrogen flow mapping table based on the current device temperature to obtain the current maximum available hydrogen flow. When the current device temperature is below a temperature threshold and the current device pressure is below a pressure threshold, the hydrogen storage system may query a second available hydrogen flow mapping table based on the current device temperature and the current device pressure to obtain the current maximum available hydrogen flow.

[0098] The first maximum available hydrogen flow mapping table is a mapping table between device temperature and maximum available hydrogen flow, storing a mapping relationship between device temperature ranges and maximum available hydrogen flow rates when the device temperature is below a temperature threshold and the device pressure is above a pressure threshold. When the current device temperature is below the temperature threshold and the current device pressure is above the pressure threshold, the current maximum available hydrogen flow rate is the maximum available hydrogen flow rate corresponding to the temperature range to which the current device temperature belongs in the first available hydrogen flow mapping table.

[0099] The second maximum available hydrogen flow mapping table is a mapping table of device temperature, device pressure, and maximum available hydrogen flow. It stores the mapping relationship between the device temperature range, device pressure range, and maximum available hydrogen flow when the device temperature is below the temperature threshold and the device pressure is below the pressure threshold. When the current device temperature is below the temperature threshold and the current device pressure is below the pressure threshold, the current maximum available hydrogen flow is the maximum available hydrogen flow corresponding to the temperature range and pressure range of the current device temperature in the second available hydrogen flow mapping table.

[0100] The temperature threshold is, for example, The pressure threshold is, for example, 3.5 P / Mpa. The current maximum available hydrogen flow rate is less than the normal hydrogen flow rate. The normal hydrogen flow rate is, for example, 3.00 g / s, and the current maximum available hydrogen flow rate is, for example, 3.7 g / s. The normal hydrogen flow rate can be the valve flow rate when the mechanical valve of the main control valve is open.

[0101] The first available hydrogen flow mapping table and the second available hydrogen flow mapping table can be obtained by testing in a test environment.

[0102] In an implementation, the first available hydrogen flow mapping table and the second available hydrogen flow mapping table may also be combined into one available hydrogen flow mapping table. When the current device temperature is below a threshold and the current device pressure is above a threshold, the hydrogen storage system may query the available hydrogen flow mapping table based on the current device temperature and determine the current maximum available hydrogen flow based on the query result. When the current device temperature is below the temperature threshold and the current device pressure is below the pressure threshold, the hydrogen storage system may query the available hydrogen flow mapping table based on the current device temperature and the current device pressure and determine the current maximum available hydrogen flow based on the query result.

[0103] S403: The hydrogen storage system sends the current maximum available hydrogen flow rate of the hydrogen storage device to the fuel cell system.

[0104] Among them, the hydrogen storage system can generate a message signal of the maximum available hydrogen flow based on the current maximum available hydrogen flow, and the message signal carries the current maximum available hydrogen flow information, and then send the message signal to the fuel cell system, thereby sending the current maximum available hydrogen flow to the fuel cell system.

[0105] S404: The fuel cell system determines the current maximum output power of the fuel cell based on the current maximum available hydrogen flow rate.

[0106] The current maximum output electric power is used to limit the current output electric power of the fuel cell, and the current output electric power is less than or equal to the current maximum output electric power.

[0107] The fuel cell system can determine the current hydrogen flow limit power based on the current maximum available hydrogen flow, and determine the current maximum output power based on the current hydrogen flow limit power and the current non-hydrogen flow limit power. The current maximum output power is the minimum of the current hydrogen flow limit power and the current non-hydrogen flow limit power.

[0108] S405 , the fuel cell system sends the current maximum output power of the fuel cell to the vehicle control system.

[0109] Among them, the fuel cell system can generate a message signal of the maximum output electric power based on the current maximum output electric power of the fuel cell. The message signal carries the current maximum output electric power information of the fuel cell. Then, the message signal can be sent to the vehicle control system, thereby sending the current maximum output electric power to the vehicle control system.

[0110] S406 , the vehicle control system determines the current fuel cell power requirement and the current power battery power requirement based on the current vehicle drive power requirement and the current maximum output power of the fuel cell.

[0111] The current fuel cell power requirement is the current power requirement for the fuel cell. The current output power of the fuel cell is equal to the current fuel cell power requirement, and the current fuel cell power requirement does not exceed the current maximum output power of the fuel cell. Thus, the current output power of the fuel cell does not exceed the current maximum output power of the fuel cell.

[0112] The current output power of the fuel cell is the total power currently being output by the fuel cell. If the fuel cell is used to both charge the power battery and drive the vehicle's electric motor, the current output power of the fuel cell is used to both charge the power battery and drive the vehicle's electric motor. If the portion of the fuel cell's current output power used to drive the vehicle's electric motor is insufficient to meet the vehicle's electric motor drive requirements, the power battery can provide the required power.

[0113] Current vehicle drive power requirement = current fuel cell power requirement * W + current power battery power requirement.

[0114] Current fuel cell power demand The maximum electrical power that a fuel cell can currently output.

[0115] Among them, W is the power ratio of the fuel cell's current output power used to drive the vehicle motor. The power ratio of the fuel cell's current output power used to drive the vehicle motor and the power used to charge the power battery is determined by the vehicle controller based on the current vehicle operating conditions.

[0116] In some embodiments, if the current vehicle drive power requirement is greater than or equal to the fuel cell's current maximum available power for driving the vehicle's motor, the current fuel cell power requirement may be equal to the fuel cell's current maximum output power, thereby enabling the fuel cell to output power at its current maximum output power. The remaining vehicle drive power requirement may be supplemented by the power battery. Here, the current maximum available power for driving the vehicle's motor = the fuel cell's current maximum output power * W.

[0117] For example, the proportion of the current output power of the fuel cell used to drive the vehicle motor may be 80%, and the proportion of the power used to charge the power battery may be 20%.

[0118] If the current vehicle drive power demand is 20, the current maximum output power of the fuel cell is 10, and the current maximum power available for the fuel cell to drive the vehicle motor is 10*80%=8, the current vehicle drive power demand is greater than the current maximum power available for the fuel cell to drive the vehicle motor. In this case, the current fuel cell power demand can be determined as 10, and the current power battery power demand can be determined as 12. Thus, the power battery can make up for the drive power demand.

[0119] If the current vehicle drive power requirement is 8, the current maximum output power of the fuel cell is 10, and the current maximum power available for the fuel cell to drive the vehicle motor is 10*80%=8, the current vehicle drive power requirement is equal to the current maximum power available for the fuel cell to drive the vehicle motor. In this case, the current fuel cell power requirement can be set to 10, so that the power of the fuel cell's current output power used to drive the vehicle motor is 10*80%=8, meeting the current vehicle drive requirement. In this case, there is no need for the power battery to supplement the drive power requirement. The current power battery power requirement can be set to 0.

[0120] If the current vehicle drive power demand is 4, and the fuel cell's current maximum output power is 10, the fuel cell's current maximum available power for driving the vehicle's motor is 10*80%=8. The current vehicle drive power demand is less than the fuel cell's current maximum available power for driving the vehicle's motor. In this case, the fuel cell's current power demand can be set to 5, so that the power of the fuel cell's current output power used to drive the vehicle's motor is 5*80%=4, meeting the current vehicle drive demand. At this point, there is no need for the power battery to supplement the power. The current power battery power demand can be set to 0.

[0121] S407 , the vehicle control system sends the current fuel cell required electrical power to the fuel cell system.

[0122] S408, the vehicle control system sends the current power battery demand electric power to the power battery system.

[0123] S409 , the fuel cell system causes the fuel cell to output power according to the current fuel cell required electrical power. The current output electrical power of the fuel cell is equal to the current fuel cell required electrical power.

[0124] S410, when the fuel cell outputs power according to the current fuel cell demand electric power, the hydrogen storage device in the hydrogen storage system supplies hydrogen to the fuel cell system according to the hydrogen supply flow rate required by the current fuel cell output electric power; S411 , the power battery system enables the power battery to output power according to the current power battery demand electric power, and the current output power of the power battery is equal to the current power battery demand electric power.

[0125] In an application, the above process may be performed periodically. For example, the above process S401 to S411 may be performed once every N time points, where the N time points are the control intervals of the hydrogen supply flow rate.

[0126] As the fuel cell charges the power battery, the power battery's charge increases. When the power battery's charge exceeds the second charge threshold, the fuel cell no longer drives the vehicle's motor. At this point, the hydrogen supply flow returns to normal, and the above steps S401 to S411 are no longer performed.

[0127] In the above embodiment, the current maximum available hydrogen flow rate of the hydrogen storage device is determined based on the current device temperature of the hydrogen storage device, the current maximum available electrical power of the fuel cell is determined based on the current maximum available hydrogen flow rate of the hydrogen storage device, and the current output electrical power of the fuel cell is limited based on the current maximum available electrical power of the fuel cell, such that the current output electrical power of the fuel cell is less than or equal to the current maximum available electrical power of the fuel cell. Because the hydrogen storage device passively supplies hydrogen to the fuel cell, when the current output electrical power of the fuel cell is limited to less than or equal to the current maximum available electrical power of the fuel cell, the hydrogen flow rate of the hydrogen storage device to the fuel cell is limited to less than or equal to the current maximum available hydrogen flow rate. The current maximum available hydrogen flow rate is the critical flow rate that allows the hydrogen storage device to reduce its current device temperature to above an ultra-low temperature threshold within a hydrogen supply flow control interval. When the hydrogen flow rate of the hydrogen storage device to the fuel cell is limited to less than or equal to the current maximum available hydrogen flow rate, the device temperature of the hydrogen storage device will not drop to the ultra-low temperature threshold within the hydrogen supply control interval, and the hydrogen storage device will not experience ultra-low temperatures. Thus, ultra-low temperatures in the hydrogen storage device can be avoided, and problems caused by ultra-low temperatures in the hydrogen storage device can be avoided.

[0128] The above describes the hydrogen supply control method provided in the embodiment of the present application in conjunction with a scenario where a hydrogen fuel cell simultaneously charges a power battery and drives a vehicle motor. It is understood that the hydrogen supply control method provided in the embodiment of the present application can also be used in other rapid hydrogen supply scenarios, such as other scenarios where excessive hydrogen supply flow can cause the hydrogen storage device to become extremely cold, which will not be further described here.

[0129] In addition, the present application also provides a hydrogen supply control device. Figure 5 is a module diagram of the hydrogen supply control device provided in some embodiments of the present application. The hydrogen supply control device 500 can be used in a hydrogen fuel cell system to control the hydrogen supply flow of the hydrogen storage device to the fuel cell in the hydrogen fuel cell system to prevent the hydrogen storage device from being extremely low in temperature. Figure 5 As shown, the device includes: An acquisition module 501 is used to acquire the current device temperature of the hydrogen storage device in the hydrogen fuel cell system; The available flow rate determination module 502 is configured to determine the current maximum available hydrogen flow rate of the hydrogen storage device based on the current device temperature when the current device temperature is lower than a temperature threshold; wherein the temperature threshold is higher than an ultra-low temperature threshold of the hydrogen storage device; The flow rate limiting module 503 is configured to limit the current output power of the fuel cell in the hydrogen fuel cell system based on the current maximum available hydrogen supply flow rate, so as to limit the current hydrogen supply flow rate of the hydrogen storage device to the fuel cell.

[0130] In some embodiments, the acquisition module 501 is used to acquire the current device pressure of the hydrogen storage device; The available flow determination module 502 is used to determine the current maximum available hydrogen flow based on the current device temperature and the current device pressure when the current device temperature is lower than a temperature threshold and the current device pressure is lower than a pressure threshold; wherein the pressure threshold is higher than an over-discharge pressure threshold of the hydrogen storage device.

[0131] In some embodiments, the available flow determination module 502 is used to determine the current maximum available hydrogen flow based on the current device temperature, the current device pressure, and the mapping relationship between the device temperature, device pressure and the maximum available hydrogen flow; wherein, the mapping relationship between the device temperature, device pressure and the maximum available hydrogen flow is obtained by testing in a test environment.

[0132] In some embodiments, the flow limiting module 503 is configured to determine the current maximum output power of the fuel cell based on the current maximum available hydrogen flow rate; and send the current maximum output power to the vehicle control system so that the vehicle control system determines the current required power of the fuel cell based on the maximum output power. The fuel cell outputs power at the current fuel cell required electrical power; the current output electrical power of the fuel cell is equal to the current fuel cell required electrical power; and the current fuel cell required electrical power does not exceed the current maximum output electrical power.

[0133] In some embodiments, determining the current maximum output power of the fuel cell based on the current maximum available hydrogen flow rate includes: determining a current hydrogen flow rate limiting power of the fuel cell based on the current maximum available hydrogen flow rate; The current hydrogen flow limit power is compared with the current non-hydrogen flow limit power of the fuel cell. If the current hydrogen flow limit power is less than the current non-hydrogen flow limit power, the current hydrogen flow limit power is determined as the current maximum output electrical power of the fuel cell.

[0134] In some embodiments, determining the current hydrogen flow rate limiting power of the fuel cell based on the current maximum available hydrogen flow rate includes: The current hydrogen flow limit power is determined based on the current maximum available hydrogen flow and the mapping relationship between the maximum available hydrogen flow and the hydrogen flow limit power; wherein, the mapping relationship between the maximum available hydrogen flow and the hydrogen flow limit power is obtained by testing in a test environment.

[0135] In some embodiments, the hydrogen supply control method executed by the hydrogen supply control device is performed when the hydrogen fuel cell system simultaneously charges the power battery and drives the vehicle motor.

[0136] Regarding the apparatus in the above embodiment, the specific manner in which each unit performs operations has been described in detail in the embodiment of the method, and will not be elaborated on here.

[0137] In addition, an embodiment of the present application also provides a hydrogen fuel cell system, which is used to execute the above-mentioned hydrogen supply control method.

[0138] In some embodiments, the hydrogen fuel cell system performs the following processes: Obtain the current device temperature of the hydrogen storage device in the hydrogen fuel cell system; When the current device temperature is lower than a temperature threshold, determining the current maximum available hydrogen flow rate of the hydrogen storage device based on the current device temperature; wherein the temperature threshold is higher than an ultra-low temperature threshold of the hydrogen storage device; The current output electric power of the fuel cell in the hydrogen fuel cell system is limited based on the current maximum available hydrogen supply flow rate, so as to limit the current hydrogen supply flow rate of the hydrogen storage device to the fuel cell.

[0139] In some embodiments, the hydrogen fuel cell system performs the following processes: Obtaining the current device pressure of the hydrogen storage device; When the current device temperature is lower than a temperature threshold and the current device pressure is lower than a pressure threshold, the current maximum available hydrogen flow rate is determined based on the current device temperature and the current device pressure; wherein the pressure threshold is higher than an over-discharge pressure threshold of the hydrogen storage device.

[0140] In some embodiments, the hydrogen fuel cell system performs the following processes: Based on the current device temperature, the current device pressure, and the mapping relationship between the device temperature, device pressure, and the available hydrogen flow rate, the current maximum available hydrogen flow rate is determined; wherein, the mapping relationship between the device temperature, device pressure, and the maximum available hydrogen flow rate is obtained by testing in a test environment.

[0141] In some embodiments, the hydrogen fuel cell system performs the following processes: determining a current maximum output power of the fuel cell based on the current maximum available hydrogen flow rate; Sending the current maximum output electric power to the vehicle control system so that the vehicle control system determines the current fuel cell required electric power based on the maximum output electric power; The fuel cell outputs power at the current fuel cell required electrical power; the current output electrical power of the fuel cell is equal to the current fuel cell required electrical power; the current fuel cell required electrical power does not exceed the current maximum output electrical power; In some embodiments, the hydrogen fuel cell system performs the following processes: determining a current hydrogen flow rate limiting power of the fuel cell based on the current maximum available hydrogen flow rate; The current hydrogen flow limit power is compared with the current non-hydrogen flow limit power of the fuel cell. If the current hydrogen flow limit power is less than the current non-hydrogen flow limit power, the current hydrogen flow limit power is determined as the current maximum output electrical power of the fuel cell.

[0142] In some embodiments, the hydrogen fuel cell system performs the following processes: The current hydrogen flow limit power is determined based on the current maximum available hydrogen flow and the mapping relationship between the maximum available hydrogen flow and the hydrogen flow limit power; wherein, the mapping relationship between the maximum available hydrogen flow and the hydrogen flow limit power is obtained by testing in a test environment.

[0143] In some embodiments, the hydrogen fuel cell system performs the following processes: The hydrogen supply control method is executed when the hydrogen fuel cell system charges the power battery and drives the vehicle motor at the same time.

[0144] Regarding the system in the above embodiment, the control method processing executed by it has been described in detail in the embodiment of the method, and will not be elaborated here.

[0145] In addition, an embodiment of the present application further provides a hydrogen vehicle, comprising the above-mentioned hydrogen fuel cell system. The vehicle provided by the embodiment of the present application can execute the above-mentioned hydrogen supply control method to achieve the same effect as the above-mentioned implementation method.

[0146] In the case of an integrated unit, the vehicle may include a processing module and a storage module. The processing module may be used to control and manage the vehicle's movements, while the storage module may be used to support the vehicle's execution of program codes and data.

[0147] The processing module may be a processor or controller that implements or executes the various exemplary logic blocks, modules, and circuits disclosed herein. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processing (DSP) and a microprocessor, and the storage module may be a memory.

[0148] This embodiment also provides a computer-readable storage medium, which stores computer program code (including but not limited to disk storage, CD-ROM, optical storage, etc.). When the computer program code runs on a computer, the computer executes the above-mentioned related method steps to implement a hydrogen supply control method provided in the above embodiment.

[0149] This embodiment further provides a computer program product. When the computer program product is run on a computer, it enables the computer to execute the above-mentioned related steps to implement the hydrogen supply control method provided in the above embodiment.

[0150] Among them, the beneficial effects of the above embodiments can refer to the beneficial effects of the corresponding methods provided above, and will not be repeated here.

[0151] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0152] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0153] In the description of this application, it should be understood that if the terms "up", "down", "front", "back", "left" and "right" are used to indicate directions or positional relationships, they are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the positions or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations of this application.

[0154] It should be noted that, in this application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. It should also be noted that the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device comprising 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, commodity or device. In the absence of further restrictions, the elements defined by the sentence "comprising a..." do not exclude the presence of other identical elements in the process, method, commodity or device comprising the elements.

[0155] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A hydrogen supply control method, characterized in that: Applied to a hydrogen fuel cell system, the method comprises: Obtain the current device temperature of the hydrogen storage device in the hydrogen fuel cell system; When the current device temperature is lower than a temperature threshold, determining the current maximum available hydrogen flow rate of the hydrogen storage device based on the current device temperature; wherein the temperature threshold is higher than an ultra-low temperature threshold of the hydrogen storage device; The current output electric power of the fuel cell in the hydrogen fuel cell system is limited based on the current maximum available hydrogen supply flow rate, so as to limit the current hydrogen supply flow rate of the hydrogen storage device to the fuel cell.

2. The hydrogen supply control method according to claim 1, characterized in that: The method further comprises: Obtaining the current device pressure of the hydrogen storage device; When the current device temperature is lower than a temperature threshold, determining the current maximum available hydrogen flow rate of the hydrogen storage device based on the current device temperature includes: When the current device temperature is lower than a temperature threshold and the current device pressure is lower than a pressure threshold, the current maximum available hydrogen flow rate is determined based on the current device temperature and the current device pressure; wherein the pressure threshold is higher than an over-discharge pressure threshold of the hydrogen storage device.

3. The hydrogen supply control method according to claim 2, characterized in that: The determining the current maximum available hydrogen flow rate based on the current device temperature and the current device pressure includes: Based on the current device temperature, the current device pressure, and the mapping relationship between the device temperature, device pressure, and the maximum available hydrogen flow rate, the current maximum available hydrogen flow rate is determined; wherein, the mapping relationship between the device temperature, device pressure, and the maximum available hydrogen flow rate is obtained by testing in a test environment.

4. The hydrogen supply control method according to claim 1, wherein limiting the current output power of the fuel cell in the hydrogen fuel cell system based on the current maximum available hydrogen supply flow rate comprises: determining a current maximum output power of the fuel cell based on the current maximum available hydrogen flow rate; Sending the current maximum output electric power to the vehicle control system so that the vehicle control system determines the current fuel cell required electric power based on the maximum output electric power; The fuel cell outputs power at the current fuel cell required electrical power; the current output electrical power of the fuel cell is equal to the current fuel cell required electrical power; and the current fuel cell required electrical power does not exceed the current maximum output electrical power.

5. The method according to claim 4, characterized in that The determining of the current maximum output power of the fuel cell based on the current maximum available hydrogen flow rate includes: determining a current hydrogen flow rate limiting power of the fuel cell based on the current maximum available hydrogen flow rate; The current hydrogen flow limit power is compared with the current non-hydrogen flow limit power of the fuel cell. If the current hydrogen flow limit power is less than the current non-hydrogen flow limit power, the current hydrogen flow limit power is determined as the current maximum output electrical power of the fuel cell.

6. The method according to claim 5, characterized in that The determining of the current hydrogen flow rate limiting power of the fuel cell based on the current maximum available hydrogen flow rate includes: The current hydrogen flow limit power is determined based on the current maximum available hydrogen flow and the mapping relationship between the maximum available hydrogen flow and the hydrogen flow limit power; wherein, the mapping relationship between the maximum available hydrogen flow and the hydrogen flow limit power is obtained by testing in a test environment.

7. The method according to claim 1, characterized in that The hydrogen supply control method is executed when the hydrogen fuel cell system charges the power battery and drives the vehicle motor at the same time.

8. A hydrogen supply control device, characterized in that: Applied to a hydrogen fuel cell system, the device comprises: An acquisition module is used to obtain the current device temperature of the hydrogen storage device in the hydrogen fuel cell system; a flow rate determination module, configured to determine a current maximum flow rate of hydrogen available for the hydrogen storage device based on the current device temperature when the current device temperature is lower than a temperature threshold; A flow limiting module is used to limit the current output electric power of the fuel cell in the hydrogen fuel cell system based on the current maximum available hydrogen supply flow, so as to limit the current hydrogen supply flow of the hydrogen storage device to the fuel cell.

9. A hydrogen fuel cell system, characterized in that: Used to execute the hydrogen supply control method according to any one of claims 1 to 7.

10. A hydrogen vehicle, characterized in that: Includes the hydrogen fuel cell system according to claim 8.

Images