Fuel cell testing method, power distribution simulator and processor

Abstract

The present application provides a fuel cell testing method, power distribution simulator and processor, the testing method comprising: receiving real-time load power, preset vehicle power and set vehicle speed sent by a host computer; determining the current preset required power of the fuel cell based on at least the set vehicle speed and the preset vehicle power, and determining the current state of charge value of the power battery based on at least the real-time load power and the preset vehicle power; determining the target required power of the fuel cell based on the preset required power and the current state of charge value, and sending the target required power to the host computer. This method achieves the dynamic separation of the fuel cell's load power demand from the vehicle power demand, so that the determined target required power is closer to the actual application of the fuel cell, thereby solving the problem in the prior art that it is difficult to better reflect the performance and durability of the fuel cell in actual vehicle application when conducting in-loop testing on the fuel cell.

Description

Technical Field

[0001] The present application relates to the field of fuel cell testing, and more specifically, to a fuel cell testing method, a power distribution simulator, a fuel cell testing platform, a computer-readable storage medium, and a processor. Background Art

[0002] Common fuel cell system test benches can dynamically load the system according to preset operating conditions to test fuel cell performance. However, in actual vehicle applications, the power requirements of fuel cells are closely related to the vehicle's energy management strategy. Therefore, existing fuel cell system test benches cannot effectively reflect the performance and durability of fuel cells in actual vehicle applications.

[0003] The above information disclosed in the background technology section is only used to enhance the understanding of the background technology of the technology described in this article. Therefore, the background technology may contain certain information that does not form the prior art known in this country to those skilled in the art. Summary of the Invention

[0004] The main purpose of this application is to provide a fuel cell testing method, a power distribution simulator, a fuel cell testing platform, a computer-readable storage medium and a processor, so as to solve the problem in the prior art that it is difficult to better reflect the performance and durability of the fuel cell in actual vehicle application when conducting in-loop testing on the fuel cell.

[0005] According to one aspect of an embodiment of the present invention, a fuel cell testing method is provided, comprising: receiving real-time load power, preset vehicle power and set vehicle speed sent by a host computer; determining the current preset required power of the fuel cell based on at least the set vehicle speed and the preset vehicle power, and determining the current state of charge value of the power battery based on at least the real-time load power and the preset vehicle power; determining the target required power of the fuel cell based on the preset required power and the current state of charge value, and sending the target required power to the host computer.

[0006] Optionally, determining the current preset required power of the fuel cell at least based on the set vehicle speed and the preset vehicle power includes: searching a first preset chart based on the set vehicle speed and the preset vehicle power to determine the current preset required power of the fuel cell.

[0007] Optionally, the current state of charge value of the power battery is determined at least based on the real-time load power and the preset vehicle power, including: calculating the difference between the preset vehicle power and the real-time load power to obtain the power battery demand power; searching a second preset chart based on the state of charge value of the power battery determined last time to determine the allowable discharge power of the power battery, and searching a third preset chart based on the state of charge value of the power battery determined last time to determine the allowable charging power of the power battery; determining the current state of charge value of the power battery at least based on the power battery demand power, the allowable discharge power and the allowable charging power.

[0008] Optionally, the current state of charge value of the power battery is determined at least based on the required power of the power battery, the allowable discharge power and the allowable charging power, including: determining the target output power of the power battery at least based on the required power of the power battery, the allowable discharge power and the allowable charging power; dividing the battery capacity of the power battery by the target output power of the power battery to obtain the power battery power decay rate; determining the current state of charge value of the power battery at least based on the power battery power decay rate and the initial value of the state of charge of the power battery.

[0009] Optionally, the target output power of the power battery is determined at least based on the required power of the power battery, the allowable discharge power and the allowable charging power, including: searching a fourth preset chart to determine the predetermined output power of the power battery according to the required power of the power battery, the allowable discharge power and the allowable charging power; determining whether the power battery is in a charging state according to the predetermined output power of the power battery; when the power battery is in a charging state, taking a positive value of the predetermined output power of the power battery to obtain the target output power of the power battery; when the power battery is in a discharging state, taking a negative value of the predetermined output power of the power battery to obtain the target output power of the power battery.

[0010] Optionally, the current state of charge value of the power battery is determined at least based on the power battery power decay rate and the initial state of charge value of the power battery, including: integrating the power battery power decay rate according to a preset integration step to obtain a state of charge change value; calculating the sum of the initial state of charge value of the power battery and the state of charge change value to obtain the current state of charge value of the power battery.

[0011] Optionally, the target required power of the fuel cell is determined based on the preset required power and the current state of charge value, including: determining the compensation power value of the power battery based on the current state of charge value of the power battery and a fifth preset chart; calculating the sum of the preset required power and the compensation power value to obtain the target required power of the fuel cell.

[0012] According to another aspect of an embodiment of the present invention, a power distribution simulator is also provided, including: a receiving unit for receiving real-time load power, preset vehicle power and set vehicle speed sent by a host computer; a first determination unit for determining the current preset required power of the fuel cell based on at least the set vehicle speed and the preset vehicle power, and determining the current state of charge value of the power battery based on at least the real-time load power and the preset vehicle power; a second determination unit for determining the target required power of the fuel cell based on the preset required power and the current state of charge value, and sending the target required power to the host computer.

[0013] According to another aspect of an embodiment of the present invention, a fuel cell testing platform is also provided, including: a fuel cell; an electric load unit for simulating the load of the fuel cell; a power distribution simulator for executing any one of the fuel cell testing methods; a host computer for communicating with the electric load unit, the fuel cell and the power distribution simulator, respectively, for calculating the real-time load power of the electric load unit, and sending the real-time load power, the preset power of the vehicle and the set speed of the vehicle to the power distribution simulator.

[0014] Optionally, the host computer is used to calculate the real-time load power of the power load unit, including: the host computer receives the real-time load current and real-time load voltage sent by the power load unit; the host computer calculates the real-time load power based on the real-time load current and the real-time load voltage.

[0015] Optionally, the host computer is also used for: the host computer receives the target required power sent by the power distribution simulator, and receives the allowable current and allowable voltage of the fuel cell; the host computer determines the set current of the fuel cell based on the allowable current, the allowable voltage and the target required power; the host computer sends the set current to the fuel cell so that the fuel cell performs work with the set current.

[0016] Optionally, the host computer is also used to: the host computer determines the load setting current of the power load unit using the minimum value of the allowable current and the set current of the fuel cell; the host computer sends the load setting current to the power load unit so that the power load unit performs work with the load setting current.

[0017] According to another aspect of the embodiments of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein the program executes any one of the fuel cell testing methods.

[0018] According to one aspect of an embodiment of the present invention, a processor is further provided, wherein the processor is configured to run a program, wherein the program executes any one of the fuel cell testing methods when running.

[0019] In an embodiment of the present invention, the fuel cell testing method includes first receiving the real-time load power, preset vehicle power, and set vehicle speed sent by the host computer; then determining the current preset required power of the fuel cell based on at least the set vehicle speed and preset vehicle power received from the host computer, and determining the current state of charge of the power battery based on at least the real-time load power and preset vehicle power received from the host computer; and finally, determining the target required power of the fuel cell based on the preset required power and the current state of charge. Compared to the prior art, which tests the fuel cell by connecting to physical devices such as an integrated motor and a gearbox, this solution does not require connecting to physical devices such as an integrated motor and a gearbox, ensuring more flexible fuel cell testing and lower fuel cell testing costs. This solution determines the current preset power requirement of the fuel cell at least based on the set vehicle speed and preset vehicle power sent by the host computer, and determines the state of charge value of the power battery based on the real-time load power and preset vehicle power sent by the host computer, and then determines the target required power based on the preset power requirement of the fuel cell and the state of charge value of the power battery, thereby realizing the dynamic separation of the load power requirement of the fuel cell from the power requirement of the vehicle, ensuring that the target required power of the fuel cell can be determined more accurately, so that the determined target required power is closer to the actual application of the fuel cell, thereby solving the problem in the existing technology that it is difficult to better reflect the performance and durability of the fuel cell in actual vehicle application when conducting in-loop testing of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0021] Figure 1 A flow chart showing a fuel cell testing method according to an embodiment of the present application is shown;

[0022] Figure 2 A schematic diagram of calculating target required power according to an embodiment of the present application is shown;

[0023] Figure 3 A schematic diagram showing calculation of the current state of charge value of a power battery according to an embodiment of the present application is shown;

[0024] Figure 4 A schematic structural diagram of a fuel cell testing device according to an embodiment of the present application is shown;

[0025] Figure 5 A structural schematic diagram of a fuel cell test platform according to an embodiment of the present application is shown.

[0026] The above drawings include the following reference numerals:

[0027] 100. Host computer; 200. Power distribution simulator; 300. Power load unit; 400. Fuel cell. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] As mentioned in the background technology, in the existing technology, when conducting in-loop testing on fuel cells, it is difficult to better reflect the performance and durability of the fuel cells in actual vehicle applications. In order to solve the above problems, in a typical embodiment of the present application, a fuel cell testing method, a power distribution simulator, a fuel cell testing platform, a computer-readable storage medium and a processor are provided.

[0032] According to an embodiment of the present application, a fuel cell testing method is provided.

[0033] Figure 1 FIG. 1 is a flow chart of a fuel cell testing method according to an embodiment of the present application. Figure 1 As shown, the method includes the following steps:

[0034] Step S101, receiving real-time load power, preset vehicle power and set vehicle speed sent by the host computer;

[0035] Step S102, determining the current preset required power of the fuel cell based on at least the set vehicle speed and the preset vehicle power, and determining the current state of charge of the power battery based on at least the real-time load power and the preset vehicle power;

[0036] Step S103 : determining the target required power of the fuel cell according to the preset required power and the current state of charge value, and sending the target required power to the host computer.

[0037] In the above-mentioned fuel cell testing method, first, the real-time load power, preset vehicle power, and set vehicle speed sent by the host computer are received; then, the current preset required power of the fuel cell is determined based on at least the set vehicle speed and the preset vehicle power received from the host computer, and the current state of charge of the power battery is determined based on at least the real-time load power and the preset vehicle power received from the host computer; finally, the target required power of the fuel cell is determined based on the preset required power and the current state of charge. Compared with the prior art, which requires connecting an integrated motor and a gearbox before testing the fuel cell, this solution does not require connecting an integrated motor and a gearbox, ensuring more flexible fuel cell testing and lower fuel cell testing costs. This solution determines the current preset power requirement of the fuel cell at least based on the set vehicle speed and preset vehicle power sent by the host computer, and determines the state of charge value of the power battery based on the real-time load power and preset vehicle power sent by the host computer, and then determines the target required power based on the preset power requirement of the fuel cell and the state of charge value of the power battery, thereby realizing the dynamic separation of the load power requirement of the fuel cell from the power requirement of the vehicle, ensuring that the target required power of the fuel cell can be determined more accurately, so that the determined target required power is closer to the actual application of the fuel cell, thereby solving the problem in the existing technology that it is difficult to better reflect the performance and durability of the fuel cell in actual vehicle application when conducting in-loop testing of the fuel cell.

[0038] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0039] In one embodiment of the present application, the current preset required power of the fuel cell is determined at least based on the above-mentioned set vehicle speed and the above-mentioned preset whole vehicle power, including: according to the above-mentioned set vehicle speed and the above-mentioned preset whole vehicle power, searching the first preset chart to determine the above-mentioned current preset required power of the above-mentioned fuel cell, thereby ensuring that the preset required power of the fuel cell can be determined relatively simply, and further realizing the separation of the load power requirement of the fuel cell from the preset whole vehicle power, and subsequently determining the target required power of the fuel cell based on the current state of charge value of the power battery and the preset required power, thereby ensuring that the determined required power of the fuel cell is more in line with the operating conditions of the actual vehicle.

[0040] Specifically, the first preset chart can be determined by empirical values. Of course, the first preset chart can also be any feasible chart in the prior art. The first preset chart is not limited in this application.

[0041] In another embodiment of the present application, the current state of charge value of the power battery is determined at least based on the above-mentioned real-time load power and the above-mentioned preset vehicle power, including: calculating the difference between the above-mentioned preset vehicle power and the above-mentioned real-time load power to obtain the power battery demand power; searching a second preset chart based on the above-mentioned state of charge value of the above-mentioned power battery determined last time to determine the allowable discharge power of the above-mentioned power battery, and searching a third preset chart based on the above-mentioned state of charge value of the above-mentioned power battery determined last time to determine the allowable charging power of the above-mentioned power battery; determining the current state of charge value of the above-mentioned power battery based on at least the above-mentioned power battery demand power, the above-mentioned allowable discharge power and the above-mentioned allowable charging power. In this embodiment, based on the state of charge value of the power battery determined last time, the second preset chart is searched to determine the allowable discharge power of the power battery, and the third preset chart is searched to determine the allowable charging power of the power battery. This ensures that the determined allowable discharge power and allowable charging power are relatively accurate and will not exceed the power of the power battery. Then, based on the power battery demand power, the allowable discharge power and the allowable charging power, the above-mentioned current state of charge value of the power battery is determined. This ensures that the current state of charge value of the power battery can be determined relatively accurately, and further ensures that the determined target demand power of the fuel cell is relatively accurate and reasonable.

[0042] Specifically, the second preset chart and the third preset chart can be determined based on empirical values. Of course, the second preset chart and the third preset chart can also be any feasible chart in the prior art. The second preset chart and the third preset chart are not limited in this application.

[0043] In order to further more accurately determine the current state of charge value of the power battery, in another embodiment of the present application, the current state of charge value of the power battery is determined at least based on the required power of the power battery, the allowable discharge power and the allowable charging power, including: determining the target output power of the power battery at least based on the required power of the power battery, the allowable discharge power and the allowable charging power; dividing the battery capacity of the power battery by the target output power of the power battery to obtain the power battery power decay rate; determining the current state of charge value of the power battery at least based on the power battery power decay rate and the initial state of charge value of the power battery.

[0044] In another embodiment of the present application, determining the target output power of the power battery based on at least the power battery demand power, the allowable discharge power, and the allowable charge power includes: searching a fourth preset chart based on the power battery demand power, the allowable discharge power, and the allowable charge power to determine the power battery's predetermined output power; determining whether the power battery is in a charging state based on the power battery's predetermined output power; if the power battery is in a charging state, taking a positive value of the power battery's predetermined output power to obtain the power battery's target output power; and if the power battery is in a discharging state, taking a negative value of the power battery's predetermined output power to obtain the power battery's target output power. In this embodiment, determining whether the power battery is in a charging state based on the power battery's predetermined output power, that is, calibrating the power battery's predetermined output power based on the power battery's charging state or discharging state, ensures that the obtained power battery's target output power is relatively accurate and reasonable.

[0045] Specifically, the fourth preset chart can be determined by empirical values. Of course, the fourth preset chart can also be any feasible chart in the prior art. This application does not limit the fourth preset chart.

[0046] In one embodiment of the present application, the current state of charge of the power battery is determined based on at least the power battery charge decay rate and the initial state of charge value of the power battery, including: integrating the power battery charge decay rate according to a preset integration step to obtain a state of charge change value; and calculating the sum of the initial state of charge value and the state of charge change value of the power battery to obtain the current state of charge value of the power battery. In this embodiment, the power battery charge decay rate is integrated according to the preset integration step to obtain the state of charge change value, that is, the increment of the power battery within the preset time period is determined. Then, based on the initial state of charge value and the state of charge change value of the power battery, this ensures that the current state of charge value of the power battery can be further determined more accurately.

[0047] Specifically, the aforementioned preset integration step may be an integration step in time units.

[0048] In order to further more accurately determine the target required power of the fuel cell, and further ensure that the determined target required power of the fuel cell is more in line with actual vehicle applications, in another embodiment of the present application, the target required power of the above-mentioned fuel cell is determined based on the above-mentioned preset required power and the current state of charge value, including: determining the compensation power value of the above-mentioned power battery based on the current state of charge value of the above-mentioned power battery and the fifth preset chart; calculating the sum of the above-mentioned preset required power and the above-mentioned compensation power value to obtain the above-mentioned target required power of the above-mentioned fuel cell.

[0049] Specifically, the fifth preset chart may be determined based on empirical values. Of course, the fifth preset chart may also be any feasible chart in the prior art. This application does not limit the fifth preset chart.

[0050] In a specific embodiment of the present application, Figure 2 Figure 2 shows a schematic diagram for calculating the target power demand. First, based on the preset vehicle power and set speed, a first preset chart is searched to determine the preset power demand. Then, based on the power battery's current state of charge, a fifth preset chart is searched to determine the power compensation value. Finally, the sum of the preset power demand and the compensation power value is calculated to obtain the target power demand of the fuel cell.

[0051] In another specific embodiment of the present application, Figure 3 The figure shows a schematic diagram for calculating the current state of charge (SOC) of a power battery. First, the difference between the vehicle's power demand and the real-time load demand is calculated to obtain the power battery's required power. Based on the last SOC value of the power battery, the second preset chart is searched to determine the power battery's allowable discharge power, and the third preset chart is searched to determine the power battery's allowable charge power. Then, based on the power battery's required power, allowable discharge power, and allowable charge power, the fourth preset chart is searched to obtain the power battery's scheduled output power. The scheduled output power is then used to determine whether the power battery is in a charging state. If the power battery is in a charging state, the positive value of the scheduled output power is used as the target output power of the power battery. If the power battery is in a discharging state, the negative value of the scheduled output power is used as the target output power of the power battery. The target output power of the power battery is then divided by the power battery capacity to obtain the power battery charge decay rate. Finally, the power battery charge decay rate is integrated according to the preset integration step size to obtain the state of charge change value, and the sum of the initial state of charge value and the state of charge change value is calculated to obtain the current state of charge value of the power battery.

[0052] The present invention also provides a power distribution simulator. It should be noted that the power distribution simulator of the present invention can be used to execute the fuel cell testing method provided in the present invention. The power distribution simulator provided in the present invention is introduced below.

[0053] Figure 4 Schematic diagram of the structure of the power distribution simulator according to the embodiment of the present application. Figure 4 As shown, the power distribution simulator includes:

[0054] The receiving unit 10 is used to receive the real-time load power, the preset vehicle power and the set vehicle speed sent by the host computer;

[0055] a first determining unit 20, configured to determine a current preset required power of the fuel cell based at least on the set vehicle speed and the preset vehicle power, and to determine a current state of charge of the power battery based at least on the real-time load power and the preset vehicle power;

[0056] The second determining unit 30 is configured to determine the target required power of the fuel cell according to the preset required power and the current state of charge value, and send the target required power to the host computer.

[0057] In the above-mentioned power distribution simulator, the receiving unit is used to receive the real-time load power, the preset vehicle power and the set speed of the vehicle sent by the host computer; the first determination unit is used to determine the current preset required power of the fuel cell based on at least the set speed and the preset vehicle power, and to determine the current state of charge of the power battery based on at least the real-time load power and the preset vehicle power; the second determination unit is used to determine the target required power of the fuel cell based on the preset required power and the current state of charge, and to send the target required power to the host computer. Compared with the prior art, which tests the fuel cell by connecting to physical objects such as an integrated motor and a gearbox, this solution does not require connecting to physical objects such as an integrated motor and a gearbox, ensuring that the fuel cell can be tested more flexibly and at a lower cost. This solution determines the current preset power requirement of the fuel cell at least based on the set vehicle speed and preset vehicle power sent by the host computer, and determines the state of charge value of the power battery based on the real-time load power and preset vehicle power sent by the host computer, and then determines the target required power based on the preset power requirement of the fuel cell and the state of charge value of the power battery, thereby realizing the dynamic separation of the load power requirement of the fuel cell from the power requirement of the vehicle, ensuring that the target required power of the fuel cell can be determined more accurately, so that the determined target required power is closer to the actual application of the fuel cell, thereby solving the problem in the existing technology that it is difficult to better reflect the performance and durability of the fuel cell in actual vehicle application when conducting in-loop testing of the fuel cell.

[0058] In one embodiment of the present application, the above-mentioned first determination unit includes a first determination module, which is used to search the first preset chart according to the above-mentioned set vehicle speed and the above-mentioned preset vehicle power, and determine the above-mentioned preset required power of the above-mentioned fuel cell. This ensures that the preset required power of the fuel cell can be determined relatively simply, and further realizes the separation of the load power requirement of the fuel cell from the preset vehicle power. Subsequently, the target required power of the fuel cell is determined according to the current state of charge value of the power battery and the preset required power, which ensures that the determined required power of the fuel cell is more in line with the operating conditions of the actual vehicle.

[0059] Specifically, the first preset chart can be determined by empirical values. Of course, the first preset chart can also be any feasible chart in the prior art. The first preset chart is not limited in this application.

[0060] In another embodiment of the present application, the above-mentioned first determination unit also includes a first calculation module, a second determination module and a third determination module, wherein the above-mentioned first calculation module is used to calculate the difference between the above-mentioned preset vehicle power and the above-mentioned real-time load power to obtain the power battery demand power; the above-mentioned second determination module is used to search the second preset chart according to the above-mentioned state of charge value of the above-mentioned power battery determined last time, and determine the allowable discharge power of the above-mentioned power battery, and search the third preset chart according to the above-mentioned state of charge value of the above-mentioned power battery determined last time, and determine the allowable charging power of the above-mentioned power battery; the above-mentioned third determination module is used to determine the current state of charge value of the above-mentioned power battery based on at least the above-mentioned power battery demand power, the above-mentioned allowable discharge power and the above-mentioned allowable charging power. In this embodiment, based on the state of charge value of the power battery determined last time, the second preset chart is searched to determine the allowable discharge power of the power battery, and the third preset chart is searched to determine the allowable charging power of the power battery. This ensures that the determined allowable discharge power and allowable charging power are relatively accurate and will not exceed the power of the power battery. Then, based on the power battery demand power, the allowable discharge power and the allowable charging power, the above-mentioned current state of charge value of the power battery is determined. This ensures that the current state of charge value of the power battery can be determined relatively accurately, and further ensures that the determined target demand power of the fuel cell is relatively accurate and reasonable.

[0061] Specifically, the second preset chart and the third preset chart can be determined based on empirical values. Of course, the second preset chart and the third preset chart can also be any feasible chart in the prior art. The second preset chart and the third preset chart are not limited in this application.

[0062] In order to further more accurately determine the current state of charge value of the power battery, in another embodiment of the present application, the above-mentioned third determination module includes a first determination submodule, a first calculation submodule and a second determination submodule, wherein the above-mentioned first determination submodule is used to determine the target output power of the power battery based on at least the required power of the power battery, the above-mentioned allowable discharge power and the above-mentioned allowable charging power; the above-mentioned first calculation submodule is used to divide the battery capacity of the above-mentioned power battery by the above-mentioned power battery target output power to obtain the power battery power decay rate; the above-mentioned second determination submodule is used to determine the current state of charge value of the above-mentioned power battery based on at least the above-mentioned power battery power decay rate and the initial value of the state of charge of the above-mentioned power battery.

[0063] In another embodiment of the present application, the first determination submodule includes a third determination submodule, a fourth determination submodule, and a fifth determination submodule, wherein the third determination submodule is configured to search a fourth preset chart based on the power battery demand power, the allowable discharge power, and the allowable charge power to determine the power battery's predetermined output power; the fourth determination submodule is configured to determine whether the power battery is in a charging state based on the power battery's predetermined output power; and the fifth determination submodule is configured to obtain the power battery's target output power by taking a positive value of the power battery's predetermined output power when the power battery is in a charging state, and to obtain the power battery's target output power by taking a negative value of the power battery's predetermined output power when the power battery is in a discharging state. In this embodiment, whether the power battery is in a charging state is determined based on the power battery's predetermined output power. In other words, the power battery's predetermined output power is calibrated based on the power battery's charging state or discharging state, thereby ensuring that the obtained power battery's target output power is relatively accurate and reasonable.

[0064] Specifically, the fourth preset chart can be determined by empirical values. Of course, the fourth preset chart can also be any feasible chart in the prior art. This application does not limit the fourth preset chart.

[0065] In one embodiment of the present application, the second determination submodule includes an integration submodule and a second calculation submodule, wherein the integration submodule is configured to integrate the power battery charge decay rate according to a preset integration step to obtain a state of charge change value; and the second calculation submodule is configured to calculate the sum of the power battery's initial state of charge value and the state of charge change value to obtain the power battery's current state of charge value. In this embodiment, the power battery charge decay rate is integrated according to the preset integration step to obtain the state of charge change value, thereby determining the power battery's increment within a preset time period. Based on the power battery's initial state of charge value and the state of charge change value, this ensures that the power battery's current state of charge value can be further more accurately determined.

[0066] Specifically, the aforementioned preset integration step may be an integration step in time units.

[0067] In order to further more accurately determine the target required power of the fuel cell, and further ensure that the determined target required power of the fuel cell is more in line with actual vehicle applications, in another embodiment of the present application, the above-mentioned second determination unit includes a fourth determination module and a second calculation module, wherein the above-mentioned fourth determination module is used to determine the compensation power value of the above-mentioned power battery based on the above-mentioned current state of charge value of the above-mentioned power battery and the fifth preset chart; the above-mentioned second calculation module is used to calculate the sum of the above-mentioned preset required power and the above-mentioned compensation power value to obtain the above-mentioned target required power of the above-mentioned fuel cell.

[0068] Specifically, the fifth preset chart may be determined based on empirical values. Of course, the fifth preset chart may also be any feasible chart in the prior art. This application does not limit the fifth preset chart.

[0069] In a specific embodiment of the present application, Figure 2 Figure 2 shows a schematic diagram for calculating the target power demand. First, based on the preset vehicle power and set speed, a first preset chart is searched to determine the preset power demand. Then, based on the power battery's current state of charge, a fifth preset chart is searched to determine the power compensation value. Finally, the sum of the preset power demand and the compensation power value is calculated to obtain the target power demand of the fuel cell.

[0070] In another specific embodiment of the present application, Figure 3 The figure shows a schematic diagram for calculating the current state of charge (SOC) of a power battery. First, the difference between the vehicle's power demand and the real-time load demand is calculated to obtain the power battery's required power. Based on the last SOC value of the power battery, the second preset chart is searched to determine the power battery's allowable discharge power, and the third preset chart is searched to determine the power battery's allowable charge power. Then, based on the power battery's required power, allowable discharge power, and allowable charge power, the fourth preset chart is searched to obtain the power battery's scheduled output power. The scheduled output power is then used to determine whether the power battery is in a charging state. If the power battery is in a charging state, the positive value of the scheduled output power is used as the target output power of the power battery. If the power battery is in a discharging state, the negative value of the scheduled output power is used as the target output power of the power battery. The target output power of the power battery is then divided by the power battery capacity to obtain the power battery charge decay rate. Finally, the power battery charge decay rate is integrated according to the preset integration step size to obtain the state of charge change value, and the sum of the initial state of charge value and the state of charge change value is calculated to obtain the current state of charge value of the power battery.

[0071] In a typical embodiment of the present application, Figure 5As shown, a fuel cell test platform is also provided, which includes a fuel cell 400, an electric load unit 300, a power distribution simulator 200 and a host computer 100, wherein the electric load unit 300 is used to simulate the load of the above-mentioned fuel cell 400; the power distribution simulator 200 is used to execute any one of the above-mentioned fuel cell test methods; the host computer 100 communicates with the above-mentioned electric load unit 300, the above-mentioned fuel cell 400 and the above-mentioned power distribution simulator 200 respectively, and the host computer 100 is used to calculate the real-time load power of the above-mentioned electric load unit 300, and send the above-mentioned real-time load power, the preset power of the whole vehicle and the set speed of the whole vehicle to the above-mentioned power distribution simulator 200.

[0072] The above-mentioned fuel cell test platform includes a fuel cell, an electric load unit, a power distribution simulator and a host computer, wherein the electric load unit is used to simulate the load of the above-mentioned fuel cell; the power distribution simulator is used to execute any of the above-mentioned fuel cell test methods; the host computer communicates with the above-mentioned electric load unit, the above-mentioned fuel cell and the above-mentioned power distribution simulator respectively, and the host computer is used to calculate the real-time load power of the above-mentioned electric load unit, and send the above-mentioned real-time load power, the preset power of the whole vehicle and the set speed of the whole vehicle to the above-mentioned power distribution simulator. Compared with the prior art, in which the fuel cell is tested by connecting to physical objects such as an integrated motor and a gearbox, the above-mentioned fuel cell test method does not require the connection of physical objects such as an integrated motor and a gearbox, thereby ensuring that the fuel cell can be tested more flexibly and the testing cost of the fuel cell is relatively low. This solution determines the current preset power requirement of the fuel cell at least based on the set vehicle speed and preset vehicle power sent by the host computer, and determines the state of charge value of the power battery based on the real-time load power and preset vehicle power sent by the host computer, and then determines the target required power based on the preset power requirement of the fuel cell and the state of charge value of the power battery, thereby realizing the dynamic separation of the load power requirement of the fuel cell from the power requirement of the vehicle, ensuring that the target required power of the fuel cell can be determined more accurately, so that the determined target required power is closer to the actual application of the fuel cell, thereby solving the problem in the existing technology that it is difficult to better reflect the performance and durability of the fuel cell in actual vehicle application when conducting in-loop testing of the fuel cell.

[0073] In this application, a power distribution simulator is added on the basis of the test scheme of a conventional test platform. The above-mentioned power distribution simulator is a simulator that internally integrates a power battery model and a power distribution strategy. The above-mentioned power battery model can dynamically integrate and calculate the current state of charge value of the power battery based on the preset vehicle power and the real-time load power. The power distribution strategy is based on the set vehicle speed of the whole vehicle, the current state of charge value of the power battery and the preset vehicle power, and according to the preset energy management strategy, solves the target power demand of the fuel cell and feeds it back to the host computer. That is, this application realizes the dynamic separation of the real-time load power of the fuel cell from the power demand of the whole vehicle, thereby obtaining a more accurate target power demand of the fuel cell, ensuring that the determined target power demand of the fuel cell is closer to the application of the actual vehicle. At the same time, it also verifies the matching degree between the energy management strategy of the whole vehicle and the performance of the fuel cell.

[0074] Specifically, the host computer may preset a power cycle of the entire vehicle (ie, the preset power of the entire vehicle). The host computer may also adopt a speed cycle.

[0075] Specifically, the host computer can determine the real-time load power of the power load unit according to the received real-time load voltage and real-time load current of the power load unit. In actual braking conditions, the real-time load power is a negative value.

[0076] In order to more simply determine the real-time load power of the power load unit, in one embodiment of the present application, as Figure 5 As shown, the host computer 100 is used to calculate the real-time load power of the power load unit 300, including: the host computer 100 receives the real-time load current and real-time load voltage sent by the power load unit 300; the host computer 100 calculates the real-time load power according to the real-time load current and the real-time load voltage.

[0077] Specifically, the power load unit is used to simulate the fuel cell load. It controls itself based on the load setting current sent by the host computer and feeds back the real-time load current and load voltage to the host computer, allowing the host computer to calculate the power load unit's real-time load power. The power load unit utilizes a current closed-loop control method, and its real-time load voltage tracks the fuel cell's output voltage.

[0078] In another embodiment of the present application, Figure 5As shown, the host computer 100 is further configured to: receive the target power demand sent by the power distribution simulator 200, and receive the allowable current and allowable voltage of the fuel cell 400; determine the set current of the fuel cell 400 based on the allowable current, the allowable voltage, and the target power demand; and send the set current to the fuel cell 400 so that the fuel cell 400 performs work at the set current. In this embodiment, the host computer receives the target power demand sent by the power distribution simulator, and the allowable current and allowable voltage sent by the fuel cell, and determines the set current of the fuel cell. This ensures that the set current of the fuel cell can be determined relatively simply and efficiently, further ensuring that the set current of the fuel cell is more in line with the needs of the entire vehicle.

[0079] Specifically, the host computer may also determine the set current of the fuel cell according to the target required power sent by the power distribution simulator, and the received allowable current, allowable voltage and power characteristics of the fuel cell.

[0080] In order to more simply determine the load setting current of the power load unit, and further ensure that the real-time load power can be more accurately calculated based on the real-time load current and real-time load voltage of the power load unit, in another embodiment of the present application, the above-mentioned host computer 100 is also used to: the above-mentioned host computer 100 determines the load setting current of the above-mentioned power load unit 300 using the minimum value of the above-mentioned allowable current and the above-mentioned set current of the above-mentioned fuel cell 400; the above-mentioned host computer 100 sends the above-mentioned load setting current to the above-mentioned power load unit 300, so that the above-mentioned power load unit 300 performs work with the above-mentioned load setting current.

[0081] The power distribution simulator includes a processor and a memory. The receiving unit, the first determining unit and the second determining unit are all stored in the memory as program units. The processor executes the program units stored in the memory to implement corresponding functions.

[0082] The processor includes a core, which retrieves the corresponding program unit from memory. One or more cores can be configured, and adjusting core parameters can address the existing problem of in-the-loop testing of fuel cells, which often fails to accurately reflect the performance and durability of fuel cells in actual vehicle applications.

[0083] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0084] An embodiment of the present invention provides a computer-readable storage medium having a program stored thereon. When the program is executed by a processor, the above-mentioned fuel cell testing method is implemented.

[0085] An embodiment of the present invention provides a processor, which is used to run a program, wherein the program executes the fuel cell testing method when running.

[0086] An embodiment of the present invention provides a device, comprising a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, at least the following steps are performed:

[0087] Step S101, receiving real-time load power, preset vehicle power and set vehicle speed sent by the host computer;

[0088] Step S102, determining the current preset required power of the fuel cell based on at least the set vehicle speed and the preset vehicle power, and determining the current state of charge of the power battery based on at least the real-time load power and the preset vehicle power;

[0089] Step S103 : determining the target required power of the fuel cell according to the preset required power and the current state of charge value, and sending the target required power to the host computer.

[0090] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0091] The present application also provides a computer program product, which, when executed on a data processing device, is adapted to execute a program for initializing at least the following method steps:

[0092] Step S101, receiving real-time load power, preset vehicle power and set vehicle speed sent by the host computer;

[0093] Step S102, determining the current preset required power of the fuel cell based on at least the set vehicle speed and the preset vehicle power, and determining the current state of charge of the power battery based on at least the real-time load power and the preset vehicle power;

[0094] Step S103 : determining the target required power of the fuel cell according to the preset required power and the current state of charge value, and sending the target required power to the host computer.

[0095] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0096] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the above-mentioned units can be 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 system, 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 units or modules, which can be electrical or other forms.

[0097] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0098] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0099] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the above-mentioned methods of each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0100] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0101] 1) In the fuel cell testing method of the present application, first, the real-time load power, preset vehicle power, and set vehicle speed sent by the host computer are received; then, the current preset required power of the fuel cell is determined based on at least the set vehicle speed and the preset vehicle power received from the host computer, and the current state of charge of the power battery is determined based on at least the real-time load power and the preset vehicle power received from the host computer; finally, the target required power of the fuel cell is determined based on the preset required power and the current state of charge. Compared with the prior art, which tests the fuel cell by connecting to physical objects such as an integrated motor and a gearbox, this solution does not require connecting to physical objects such as an integrated motor and a gearbox, ensuring that the fuel cell can be tested more flexibly and at a lower cost. This solution determines the current preset power requirement of the fuel cell at least based on the set vehicle speed and preset vehicle power sent by the host computer, and determines the state of charge value of the power battery based on the real-time load power and preset vehicle power sent by the host computer, and then determines the target required power based on the preset power requirement of the fuel cell and the state of charge value of the power battery, thereby realizing the dynamic separation of the load power requirement of the fuel cell from the power requirement of the vehicle, ensuring that the target required power of the fuel cell can be determined more accurately, so that the determined target required power is closer to the actual application of the fuel cell, thereby solving the problem in the existing technology that it is difficult to better reflect the performance and durability of the fuel cell in actual vehicle application when conducting in-loop testing of the fuel cell.

[0102] 2) In the power distribution simulator of the present application, the receiving unit is used to receive the real-time load power, the preset vehicle power and the set speed of the vehicle sent by the host computer; the first determination unit is used to determine the current preset required power of the fuel cell based on at least the set speed and the preset vehicle power, and determine the current state of charge value of the power battery based on at least the real-time load power and the preset vehicle power; the second determination unit is used to determine the target required power of the fuel cell based on the preset required power and the current state of charge value, and send the target required power to the host computer. Compared with the prior art, which tests the fuel cell by connecting to physical objects such as an integrated motor and a gearbox, this solution does not require connecting to physical objects such as an integrated motor and a gearbox, ensuring that the fuel cell can be tested more flexibly and the testing cost of the fuel cell is relatively low. This solution determines the current preset power requirement of the fuel cell at least based on the set vehicle speed and preset vehicle power sent by the host computer, and determines the state of charge value of the power battery based on the real-time load power and preset vehicle power sent by the host computer, and then determines the target required power based on the preset power requirement of the fuel cell and the state of charge value of the power battery, thereby realizing the dynamic separation of the load power requirement of the fuel cell from the power requirement of the vehicle, ensuring that the target required power of the fuel cell can be determined more accurately, so that the determined target required power is closer to the actual application of the fuel cell, thereby solving the problem in the existing technology that it is difficult to better reflect the performance and durability of the fuel cell in actual vehicle application when conducting in-loop testing of the fuel cell.

[0103] 3) The fuel cell test platform of the present application includes a fuel cell, an electric load unit, a power distribution simulator and a host computer, wherein the electric load unit is used to simulate the load of the above-mentioned fuel cell; the power distribution simulator is used to execute any of the above-mentioned fuel cell test methods; the host computer communicates with the above-mentioned electric load unit, the above-mentioned fuel cell and the above-mentioned power distribution simulator respectively, and the host computer is used to calculate the real-time load power of the above-mentioned electric load unit, and send the above-mentioned real-time load power, the preset power of the whole vehicle and the set speed of the whole vehicle to the above-mentioned power distribution simulator. Compared with the prior art, in which the fuel cell is tested by connecting to physical objects such as an integrated motor and a gearbox, the present solution does not need to connect to physical objects such as an integrated motor and a gearbox, thereby ensuring that the fuel cell can be tested more flexibly and the cost of testing the fuel cell is relatively low. This solution determines the current preset power requirement of the fuel cell at least based on the set vehicle speed and preset vehicle power sent by the host computer, and determines the state of charge value of the power battery based on the real-time load power and preset vehicle power sent by the host computer, and then determines the target required power based on the preset power requirement of the fuel cell and the state of charge value of the power battery, thereby realizing the dynamic separation of the load power requirement of the fuel cell from the power requirement of the vehicle, ensuring that the target required power of the fuel cell can be determined more accurately, so that the determined target required power is closer to the actual application of the fuel cell, thereby solving the problem in the existing technology that it is difficult to better reflect the performance and durability of the fuel cell in actual vehicle application when conducting in-loop testing of the fuel cell.

[0104] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A fuel cell testing method, characterized in that: include: Receive the real-time load power, preset vehicle power and vehicle speed sent by the host computer; Determining a current preset required power of the fuel cell based at least on the set vehicle speed and the preset vehicle power, and determining a current state of charge value of the power battery based at least on the real-time load power and the preset vehicle power; Determine the target power requirement of the fuel cell according to the preset power requirement and the current state of charge value, and send the target power requirement to the host computer, The method of determining the current preset required power of the fuel cell at least based on the set vehicle speed and the preset vehicle power includes: searching a first preset chart based on the set vehicle speed and the preset vehicle power to determine the current preset required power of the fuel cell; Determining the current state of charge of the power battery at least based on the real-time load power and the preset vehicle power, including: calculating the difference between the preset vehicle power and the real-time load power to obtain the power battery demand power; searching a second preset chart based on the last determined state of charge of the power battery to determine the allowable discharge power of the power battery, and searching a third preset chart based on the last determined state of charge of the power battery to determine the allowable charging power of the power battery; determining the current state of charge of the power battery at least based on the power battery demand power, the allowable discharge power, and the allowable charging power, Determining the target required power of the fuel cell based on the preset required power and the current state of charge value, including: determining the compensation power value of the power battery based on the current state of charge value of the power battery and a fifth preset chart; calculating the sum of the preset required power and the compensation power value to obtain the target required power of the fuel cell.

2. The testing method according to claim 1, wherein: Determining the current state of charge of the power battery based on at least the required power of the power battery, the allowable discharge power, and the allowable charging power includes: determining a target output power of the power battery based at least on the required power of the power battery, the allowable discharge power, and the allowable charge power; Dividing the battery capacity of the power battery by the target output power of the power battery to obtain a power battery power attenuation rate; The current state of charge value of the power battery is determined based on at least the power battery power attenuation rate and the initial state of charge value of the power battery.

3. The testing method according to claim 2, wherein: Determining a target output power of the power battery based at least on the power battery demand power, the allowable discharge power, and the allowable charge power includes: searching a fourth preset table to determine a predetermined output power of the power battery according to the required power of the power battery, the allowable discharge power, and the allowable charge power; determining whether the power battery is in a charging state according to a predetermined output power of the power battery; When the power battery is in a charging state, a positive value of the predetermined output power of the power battery is taken to obtain the target output power of the power battery. When the power battery is in a discharging state, a negative value of the predetermined output power of the power battery is taken to obtain the target output power of the power battery.

4. The testing method according to claim 2, wherein: Determining the current state of charge value of the power battery based on at least the power battery power attenuation rate and the initial state of charge value of the power battery includes: Integrating the power battery charge decay rate according to a preset integration step to obtain a state of charge change value; The sum of the initial state of charge value and the change in state of charge of the power battery is calculated to obtain the current state of charge value of the power battery.

5. A power distribution simulator, characterized in that: include: The receiving unit is used to receive the real-time load power, preset vehicle power and set vehicle speed sent by the host computer; a first determining unit, configured to determine a current preset required power of the fuel cell based at least on the set vehicle speed and the preset vehicle power, and to determine a current state of charge value of the power battery based at least on the real-time load power and the preset vehicle power; A second determining unit is configured to determine a target required power of the fuel cell according to the preset required power and the current state of charge value, and to send the target required power to the host computer; The first determining unit includes a first determining module for searching a first preset chart to determine the current preset required power of the fuel cell according to the set vehicle speed and the preset vehicle power. The first determination unit further includes a first calculation module, a second determination module, and a third determination module, wherein the first calculation module calculates the difference between the preset vehicle power and the real-time load power to obtain the power battery demand power; the second determination module is used to search a second preset chart based on the state of charge value of the power battery determined last time to determine the allowable discharge power of the power battery, and to search a third preset chart based on the state of charge value of the power battery determined last time to determine the allowable charging power of the power battery; the third determination module is used to determine the current state of charge value of the power battery based on at least the power battery demand power, the allowable discharge power, and the allowable charging power. The second determination unit includes a fourth determination module and a second calculation module, wherein the fourth determination module is used to determine the target required power of the fuel cell based on the preset required power and the current state of charge value, including: determining the compensation power value of the power battery based on the current state of charge value of the power battery and a fifth preset chart; the second calculation module is used to calculate the sum of the preset required power and the compensation power value to obtain the target required power of the fuel cell.

6. A fuel cell testing platform, characterized in that: include: fuel cells; an electrical load unit, used to simulate the load of the fuel cell; A power distribution simulator for executing the fuel cell testing method according to any one of claims 1 to 4; The host computer communicates with the power load unit, the fuel cell and the power distribution simulator respectively, and is used to calculate the real-time load power of the power load unit, and send the real-time load power, the preset power of the whole vehicle and the set speed of the whole vehicle to the power distribution simulator.

7. The test platform according to claim 6, characterized in that: The host computer is used to calculate the real-time load power of the power load unit, including: The host computer receives the real-time load current and real-time load voltage sent by the power load unit; The host computer calculates the real-time load power according to the real-time load current and the real-time load voltage.

8. The test platform according to claim 6, characterized in that: The host computer is also used for: The host computer receives the target required power sent by the power distribution simulator, and receives the allowable current and allowable voltage of the fuel cell; The host computer determines the set current of the fuel cell according to the allowable current, the allowable voltage and the target required power; The host computer sends the set current to the fuel cell, so that the fuel cell performs work at the set current.

9. The test platform according to claim 8, characterized in that: The host computer is also used for: The host computer determines the load setting current of the power load unit by taking the minimum value between the allowable current of the fuel cell and the set current; The host computer sends the load setting current to the power load unit, so that the power load unit performs work with the load setting current.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored program, wherein the program executes the fuel cell testing method according to any one of claims 1 to 4.

11. A processor, characterized in that: The processor is configured to run a program, wherein the program, when running, executes the fuel cell testing method according to any one of claims 1 to 4.

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