A complex working condition control method for a fuel cell test platform

Abstract

The present invention discloses a complex working condition control method for a fuel cell test platform, which belongs to the field of renewable energy and hydrogen energy technology. Specifically, the vehicle power demand curve is used as the vehicle power system working condition script, and the vehicle energy management strategy is used to convert the vehicle power demand curve into a target power curve of the fuel cell power system, which is the corresponding working condition script; based on the intrinsic matching relationship between current and power in the fuel cell power system, the target power curve is converted into a target current curve of the fuel cell power module, which is the corresponding working condition script; for the target current curve of the fuel cell power module, the test condition parameters of each current point are customized, and then the fuel cell stack working condition script is constructed; the fuel cell test platform completes the automatic working condition test of the corresponding test object according to the different working condition scripts imported. The present invention can complete the automatic test working condition conversion of different test objects, reduce the difficulty of automatic test working condition generation of different test objects, and is easy to program and implement.

Description

Technical Field

[0001] The invention belongs to the technical field of renewable energy and hydrogen energy, and specifically relates to a complex working condition control method for a fuel cell test platform. Background Art

[0002] The rapid development of my country's hydrogen energy industry has put forward higher and more specific requirements for product performance testing and evaluation in the commercial application of fuel cells. As the core of the current mainstream fuel cell power system, the proton exchange membrane fuel cell stack cannot rely solely on itself to complete the power generation task. It requires the cooperation of peripheral auxiliary components with different functions to form a complete power system. The coordinated operation of each part can convert chemical energy into electrical energy. Depending on the application scenario, the composition of the power system is also different. For example, the composition of the fuel cell power system used in the field of fixed power generation and the field of transportation has obvious differences. The difference in application scenarios also represents the difference in actual power generation conditions.

[0003] In the process of commercial application of fuel cells, whether it is the fuel cell stack, auxiliary components, or assembled fuel cell modules and power systems, they all need to undergo detailed and complete performance testing to ensure product quality and complete product iterative development.

[0004] The differentiation of test requirements brought about by the diversification of test objects, coupled with the complexity of test conditions, puts forward higher requirements for the development of fuel cell test platforms. At present, the mainstream fuel cell test platform manufacturers in the industry adopt the method of developing different models and different functions of test benches according to different test requirements. Although this approach meets the current basic test needs, there are still problems such as a large number of platforms due to the single function of the test platform, low utilization rate and high user testing costs. In addition, the complexity of test conditions caused by different power system energy management strategies has not been well solved. It is still difficult to convert vehicle driving conditions into fuel cell power system conditions.

[0005] Therefore, how to integrate the test requirements of different test objects, expand the adaptability of the test platform, realize multi-level testing of "battery stack-module-system" in a single test platform, and simplify the complexity of automatic test condition generation is the key to realizing the test platform prototype and engineering application.

[0006] The above-mentioned key issues require the test platform to cooperate with each other from multiple angles, including chemical system design, electronic control system design, and control software design. After the chemical system, electronic control system, and control software meet the requirements of multi-level testing, there needs to be a certain degree of secondary development that can be performed by experimental personnel. A method for customizing the generation of test conditions based on the system structure and operating requirements of the object being tested is needed to further enhance the capabilities of the test bench. Summary of the invention

[0007] In order to cope with the problems of large differences in automatic test processes and cumbersome working condition formulation caused by the diversification of test objects on the fuel cell test platform, the present invention proposes a complex working condition control method for the fuel cell test platform to assist experimenters in quickly generating automatic test condition scripts for different test objects according to the system structure and test requirements of the test objects, thereby expanding the adaptability of the test platform to test objects and test conditions.

[0008] The specific technical solutions of the present invention are as follows:

[0009] A complex working condition control method for a fuel cell test platform, characterized by comprising the following steps:

[0010] Step 1: The test objects of the fuel cell test platform include a fuel cell power system, a fuel cell power module and a fuel cell stack; wherein the fuel cell power module includes a fuel cell stack and a peripheral auxiliary system (BOP); the fuel cell power system includes a fuel cell power module and a DC-DC;

[0011] Step 2: For a vehicle power system composed of a fuel cell power system and energy matching components, the vehicle power demand curve is used as the vehicle power system operating script. According to the real-time power state of the energy matching components and the energy management strategy of the vehicle, the vehicle power demand curve is converted into a target power curve of the fuel cell power system during automatic testing as the fuel cell power system operating script;

[0012] Step 3: Based on the intrinsic matching relationship between the stack current and the power system power in the fuel cell power system, the target power curve of the fuel cell power system is converted into a target current curve of the fuel cell power module as a fuel cell power module operating condition script;

[0013] Step 4: For the target current curve of the fuel cell power module, customize the test condition parameters corresponding to each current point, and then construct the fuel cell stack operating script corresponding to each current point, including command sequence, instruction flag, specific instruction, instruction corresponding test condition parameters and specific test condition parameter values;

[0014] Step 5: The fuel cell test platform completes the automatic operating condition test of the corresponding test object according to the imported fuel cell power system operating condition script, fuel cell power module operating condition script or fuel cell stack operating condition script.

[0015] Furthermore, the peripheral auxiliary system includes electronic control components, and hydrogen, air, and thermal management modules.

[0016] Furthermore, the energy matching component is a lithium battery or a supercapacitor.

[0017] Furthermore, step 2 converts the vehicle power demand curve into a target power curve of the fuel cell power system through an energy management strategy unit, wherein the energy management strategy unit includes an energy management strategy module and an energy matching component simulation module, the energy matching component simulation module is used to simulate the real-time power state of the energy matching component, and the energy management strategy module converts the vehicle power demand curve into the target power curve of the fuel cell power system according to the simulation results of the energy matching component simulation module and the energy management strategy of the vehicle.

[0018] Furthermore, in step 5, when the fuel cell power system operating condition script is imported, the fuel cell test platform sends the target power to the electronic control component and sets the electronic load to the passive constant voltage mode; the electronic control component controls the fuel cell power system to establish the operating conditions required for the fuel cell stack to generate electricity. After the operating conditions are met, the electronic control component controls the DC-DC to convert the direct current output by the fuel cell power module into an adjustable direct current power supply suitable for the vehicle power system, and transmits electrical energy to the electronic load.

[0019] Furthermore, in step 5, when the fuel cell power module operating condition script is imported, the fuel cell test platform sends the target current to the electronic control component and sets the electronic load to an active constant current mode; the electronic control component controls the fuel cell power module to establish the operating conditions required for the fuel cell stack to generate electricity. After the operating conditions are met, the fuel cell power module sends a signal that it can pull the load to the fuel cell test platform, and the fuel cell test platform controls the electronic load to actively pull the load.

[0020] Furthermore, in step 5, when the fuel cell stack operating condition script is imported, the fuel cell test platform configures the test condition parameters required for the operation of the fuel cell stack in sequence according to the command sequence of the hydrogen, air, and thermal management modules based on the operating parameters in the script. After the test conditions are met, the stack current is drawn to complete the automatic operating condition test of the fuel cell stack.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention proposes a complex working condition control method for a fuel cell test platform, which converts the vehicle power system working condition script step by step into a working condition script suitable for a fuel cell power system, a fuel cell module, and a fuel cell stack, so as to match the fuel cell test platform, complete the automatic test working condition conversion between different test objects, and reduce the difficulty of generating automatic test working conditions for different test objects;

[0023] 2. The method proposed in the present invention can be matched with the fuel cell test platform control software through programming, and assist in the development and verification of the vehicle energy management strategy;

[0024] 3. The method proposed in the present invention can be directly used in practical engineering applications to solve practical problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of boundary division of different test objects in Example 1 of the present invention;

[0026] Figure 2 Schematic diagram of the conversion of automatic test condition scripts for different test objects in Example 1 of the present invention;

[0027] Figure 3 is the vehicle power demand curve of embodiment 1 of the present invention;

[0028] Figure 4 is the target power curve of the fuel cell power system in Example 1 of the present invention;

[0029] Figure 5 is the intrinsic matching relationship between the stack current and the power system power of the fuel cell power system in Example 1 of the present invention;

[0030] Figure 6 This is the target current curve of the fuel cell power module in Example 1 of the present invention. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described in conjunction with the following specific embodiments and with reference to the accompanying drawings.

[0032] The following non-limiting embodiments may enable a person skilled in the art to more fully understand the present invention, but are not intended to limit the present invention in any way.

[0033] Example 1

[0034] This embodiment proposes a complex working condition control method for a fuel cell test platform, which specifically includes the following steps:

[0035] Step 1: The test objects of the fuel cell test platform include a fuel cell power system, a fuel cell power module and a fuel cell stack; wherein the fuel cell power module includes a fuel cell stack and a peripheral auxiliary system, and the peripheral auxiliary system includes an electronic control component, and auxiliary components of hydrogen, air, and thermal management modules; the fuel cell power system includes a fuel cell power module and a DC-DC;

[0036] This embodiment also relates to a vehicle power system operating condition, wherein the vehicle power system includes a fuel cell power system and an energy matching component, wherein the energy matching component is a lithium battery or a supercapacitor;

[0037] The schematic diagram of boundary division of different objects in this embodiment is as follows Figure 1As shown;

[0038] The following is the conversion of the automatic test condition scripts for different test objects, such as Figure 2 As shown;

[0039] Step 2: Figure 3 The vehicle power demand curve shown is a vehicle power system operating condition script. Through the energy management strategy unit, the vehicle power demand curve is converted into a target power curve (referred to as power system power) of the fuel cell power system during automatic testing. Figure 4 As shown, it is used as a fuel cell power system operating script;

[0040] The energy management strategy unit includes an energy management strategy module and an energy matching component simulation module. The energy matching component simulation module is used to simulate the real-time power state of the energy matching component. The energy management strategy module converts the power demand curve of the whole vehicle into the target power curve of the fuel cell power system according to the simulation result of the energy matching component simulation module and the energy management strategy of the whole vehicle;

[0041] Step 3: Based on the intrinsic matching relationship between the stack current and the power system power of the fuel cell power system (referred to as the current-power correspondence relationship), Figure 5 As shown, the target power curve of the fuel cell power system is converted into the target current curve of the fuel cell power module (referred to as the power module current) through the stack current and engine power matching unit, as shown in FIG. Figure 6 As shown, it is used as the fuel cell power module operating script;

[0042] Step 4: For the target current curve of the fuel cell power module, customize the test condition parameters corresponding to each target current, including load setting value, load gradient, anode air intake flow rate, anode air intake excess ratio, anode air intake pressure, anode air intake temperature, anode air intake humidity, cathode air intake flow rate, cathode air intake excess ratio, cathode air intake pressure, cathode air intake temperature, cathode air intake humidity, circulating water inlet temperature, circulating water flow rate and waiting time;

[0043] Then, through the stack test condition matching unit, a fuel cell stack operating script corresponding to each target current is constructed, including command sequence, instruction flag, specific instruction, instruction corresponding test condition parameter and specific test condition parameter value. Table 1 shows a portion of the intercepted fuel cell stack operating script;

[0044] Table 1 Some fuel cell stack operating scripts

[0045]

[0046]

[0047] Step 5: The fuel cell test platform completes the automatic operating condition test of the corresponding test object according to the imported fuel cell power system operating condition script, fuel cell power module operating condition script or fuel cell stack operating condition script;

[0048] When the fuel cell power system operating script is imported, the fuel cell test platform sends the target power to the electronic control component and sets the electronic load to the passive constant voltage mode; the electronic control component controls the fuel cell power system to build the operating conditions required for the fuel cell stack to generate electricity. After the operating conditions are met, the electronic control component controls the DC-DC to convert the DC power output by the fuel cell power module into an adjustable DC power supply suitable for the vehicle power system, and transmits electrical energy to the electronic load;

[0049] When the fuel cell power module operating script is imported, the fuel cell test platform sends the target current to the electronic control component and sets the electronic load to the active constant current mode; the electronic control component controls the fuel cell power module to build the operating conditions required for the fuel cell stack to generate electricity. After the operating conditions are met, the fuel cell power module sends a signal to the fuel cell test platform that it can pull the load, and the fuel cell test platform controls the electronic load to actively pull the load;

[0050] When the fuel cell stack operating condition script is imported, the fuel cell test platform configures the test condition parameters required for the operation of the fuel cell stack in sequence according to the command sequence of the auxiliary components of the hydrogen, air, and thermal management modules based on the operating parameters in the script. When the test conditions are met, the stack current is drawn to complete the automatic operating condition test of the fuel cell stack.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the embodiments, a person skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A complex working condition control method for a fuel cell test platform, characterized in that: The following steps are involved: Step 1: The test object of the fuel cell test platform includes a fuel cell power system; the fuel cell power system includes a fuel cell power module and a DC-DC; the fuel cell power module includes a fuel cell stack and a peripheral auxiliary system; the peripheral auxiliary system includes an electronic control component, as well as a hydrogen, air, and thermal management module; Step 2: For a vehicle power system composed of a fuel cell power system and an energy matching component, the vehicle power demand curve is used as the vehicle power system operating condition script. According to the real-time power state of the energy matching component and the energy management strategy of the vehicle, the vehicle power demand curve is converted into a target power curve of the fuel cell power system during automatic testing as the fuel cell power system operating condition script; the energy matching component is a lithium battery or a supercapacitor; Step 3: Based on the intrinsic matching relationship between the stack current and the power system power in the fuel cell power system, the target power curve of the fuel cell power system is converted into a target current curve of the fuel cell power module as a fuel cell power module operating condition script; Step 4: For the target current curve of the fuel cell power module, customize the test condition parameters corresponding to each current point, and then construct the fuel cell stack operating script corresponding to each current point, including command sequence, instruction flag, specific instruction, instruction corresponding test condition parameters and specific test condition parameter values; Step 5: The fuel cell test platform completes the automatic operating condition test of the corresponding test object according to the imported fuel cell power system operating condition script, fuel cell power module operating condition script or fuel cell stack operating condition script.

2. The complex operating condition control method of the fuel cell test platform according to claim 1 is characterized in that: Step 5: When the fuel cell power system operating script is imported, the fuel cell test platform sends the target power to the electronic control component and sets the electronic load to the passive constant voltage mode; the electronic control component controls the fuel cell power system to build the operating conditions required for the fuel cell stack to generate electricity. After the operating conditions are met, the electronic control component controls the DC-DC to convert the DC power output by the fuel cell power module into an adjustable DC power supply to deliver electrical energy to the electronic load.

3. The complex working condition control method of the fuel cell test platform according to claim 1 is characterized in that: Step 5: When the fuel cell power module operating condition script is imported, the fuel cell test platform sends the target current to the electronic control component and sets the electronic load to the active constant current mode; the electronic control component controls the fuel cell power module to build the operating conditions required for the fuel cell stack to generate electricity. After the operating conditions are met, the fuel cell power module sends a load signal to the fuel cell test platform, and the fuel cell test platform controls the electronic load to actively load.

4. The complex operating condition control method of the fuel cell test platform according to claim 1, characterized in that: Step 5: When the fuel cell stack operating condition script is imported, the fuel cell test platform configures the test condition parameters required for the fuel cell stack to operate in sequence according to the command sequence of the hydrogen, air, and thermal management modules based on the operating parameters in the script. After the test conditions are met, the stack current is drawn to complete the automatic operating condition test of the fuel cell stack.

5. The complex working condition control method of the fuel cell test platform according to claim 1 is characterized in that: Step 2 converts the vehicle power demand curve into a target power curve of the fuel cell power system through an energy management strategy unit. The energy management strategy unit includes an energy management strategy module and an energy matching component simulation module. The energy matching component simulation module is used to simulate the real-time power state of the energy matching component. The energy management strategy module converts the vehicle power demand curve into the target power curve of the fuel cell power system based on the simulation results of the energy matching component simulation module and the energy management strategy of the vehicle.

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