Fuel cell stack inspection and detection device and method

Abstract

The present invention discloses a fuel cell stack inspection and detection device and method. The fuel cell stack inspection and detection device includes a voltage control and measurement module for measuring the total voltage of the detection device; a stack simulation voltage module for simulating the voltage value of the fuel cell stack under operating conditions; a voltage regulation module electrically connected to the stack simulation voltage module for regulating changes in the voltage value of the stack simulation voltage module under operating conditions; and an inspection module for connecting to the stack simulation voltage module and detecting the output circuit signal of the stack simulation voltage module in real time. The method based on the fuel cell stack inspection and detection device achieves a safe and simple operation process, eliminates the need for advance assembly preparation, improves the sensitivity of the control channel, and reduces the verification cost of the inspection module.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell stack detection, and in particular to a fuel cell stack inspection device and method. Background Art

[0002] A fuel cell stack is composed of multiple fuel cell units connected in series, offering advantages such as high power, high density, and zero pollution. With the development of society, people's quality of life continues to improve, and the concept of clean energy and environmental protection is becoming increasingly popular. Fuel cells are increasingly used in the clean energy market, placing higher and higher demands on their technical and safety.

[0003] In existing fuel cell stack reaction technology, the main function of the CVM inspection module is to collect the fuel cell cell voltage (or total stack voltage) signal and send it to the fuel cell system controller. By checking the cell voltage signal, it can determine the working status of the fuel cell and perform corresponding control operations. The health status of the fuel cell is mainly reflected in its cell voltage. Adverse operating conditions such as excessive dryness, excessive humidity, lack of air, and mechanical damage will cause the cell voltage of the fuel cell to change. Therefore, if you want to diagnose the status of the fuel cell or rely on the cell voltage to control the fuel cell system, you need to know the cell voltage of the fuel cell and use the fuel cell (stack) and inspection in conjunction.

[0004] However, when testing the CVM inspection module, it is necessary to test the CVM inspection module under the actual working state of the fuel cell stack, and improve the existing problems of the CVM inspection module based on the feedback of actual problems during the operation of the fuel cell stack system. The existing problems of the CVM inspection module generally include channel insensitivity, and the channel is inconsistent with the actual communication, and negative voltage values cannot be obtained. This preparation process is relatively complicated to operate, and the reaction waiting preparation time is long. Under normal circumstances, a single battery is used to simulate a single-channel test verification of the CVM inspection module, but a dry battery can only simply simulate the working state of the stack. The actual application process is relatively complicated to verify all channels of the CVM inspection module, which is not easy to operate and increases the cost. It is also impossible to detect and verify peak voltage on multiple channels at the same time. Summary of the Invention

[0005] In response to the deficiencies of the prior art, the present invention provides a fuel cell stack inspection detection device and method, which solves the problem that the existing CVM inspection module detection device can only simply simulate the working status of the fuel cell stack and has high simulation costs.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: Based on the fuel cell stack inspection and detection device and method,

[0007] The first aspect is based on a fuel cell stack inspection and detection device, including:

[0008] A voltage control and measurement module is used to measure the total voltage value of the detection device;

[0009] The fuel cell stack simulation voltage module is used to simulate the voltage value of the fuel cell stack in the working state;

[0010] A voltage regulating module, which is electrically connected to the stack simulation voltage module and is used to regulate changes in the voltage value of the stack simulation voltage module in a working state;

[0011] The inspection module is used to connect to the battery stack simulation voltage module and detect the output circuit signal of the battery stack simulation voltage module in real time.

[0012] Preferably, the system further comprises a compensation module, which is connected to the inspection module and is used to provide a voltage compensation signal.

[0013] Preferably, it further includes a data processing module, which is electrically connected to the inspection module and is used to process the output circuit signal output by the stack analog voltage module.

[0014] Preferably, the stack simulation voltage module includes at least one constant current device.

[0015] Preferably, the voltage regulating module includes an adjustable resistor matching the constant current device.

[0016] Preferably, the constant current device and the matching adjustable resistor are connected with corresponding opening and closing devices for simulating the reaction state of the fuel cell stack. The constant current device is a 3V dry battery, and the adjustable resistor is a 500Ω sliding resistor.

[0017] In the second aspect, based on the fuel cell stack inspection and detection method, the above fuel cell stack inspection and detection device is adopted, including:

[0018] Close the corresponding opening and closing device to put the fuel cell stack inspection and detection device into working state;

[0019] Adjusting the adjustable resistor to simulate the reaction state of the fuel cell stack;

[0020] The data processing module displays the output circuit signal output by the stack simulation voltage module to feed back the test verification results of the inspection module.

[0021] Preferably, the corresponding opening and closing device is closed to put the fuel cell stack inspection and detection device into an operating state; specifically, the opening and closing device is closed according to the fuel cell stack reaction condition to simulate the fuel cell stack reaction state;

[0022] When the opening and closing device is in the closed state, the fuel cell stack inspection and detection device is in the working state;

[0023] It also includes starting a compensation unit according to the working state of the inspection unit to provide a 9-36V DC power supply to the inspection unit.

[0024] Preferably, adjusting the adjustable resistor to simulate the reaction state of the fuel cell stack includes:

[0025] According to the peak value detected by the inspection module, the adjustable resistor can be adjusted to obtain the corresponding positive voltage value.

[0026] When the inspection module needs to collect negative voltage values, the negative voltage values can be obtained by swapping the wiring pins.

[0027] Preferably, the data processing module displays the output circuit signal output by the stack simulation voltage module to feed back the test verification result of the inspection module, specifically including:

[0028] The data processing module displays the output circuit signal of the stack simulation voltage module and processes the trigger frame sending command required by the inspection module;

[0029] Send commands based on output circuit signals and frames to obtain inspection module test verification results.

[0030] The present invention has the following beneficial effects:

[0031] By setting a voltage control measurement module, a stack simulation voltage module, a voltage regulation module and an inspection module in the fuel cell stack inspection and detection device, the stack simulation voltage module can simulate the voltage change state of the stack under the action of the voltage regulation module. There is no need to assemble and prepare the battery stack reaction materials in advance. The number of channels of the detection device is updated according to the actual number of channels of the inspection module. The operation is safe and simple.

[0032] The inspection module is connected to the data processing module, and the data processing inspection module outputs the circuit signal to obtain the voltage changes under the actual operation of the simulated battery stack. According to the inspection module communication protocol, the host computer is developed to detect the data feedback of the inspection module and the trigger frame sending required by the inspection module, which facilitates data analysis and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of a fuel cell stack inspection and detection device according to the present invention;

[0034] Figure 2 This is a flow chart of the method based on the fuel cell stack inspection and detection device adopted by the present invention. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figure 1 The present invention provides a technical solution: a patrol inspection device based on a fuel cell stack, including a voltage control measurement module 101, used to measure the total voltage value of the detection device; a stack simulation voltage module 102, used to simulate the voltage value of the fuel cell stack under the working state; a voltage regulation module 103, wherein the voltage regulation module 103 is electrically connected to the stack simulation voltage module 102, and is used to adjust the change of the voltage value of the stack simulation voltage module under the working state; and a patrol inspection module 106, used to connect to the stack simulation voltage module 102 and detect the output circuit signal of the stack simulation voltage module 102 in real time.

[0037] By setting a voltage control measurement module 101, a stack simulation voltage module 102, a voltage regulation module 103 and an inspection module 106 in the fuel cell stack inspection and detection device, the stack simulation voltage module 102 can simulate the voltage change state of the stack under the action of the voltage regulation module 103, without the need to assemble and prepare the battery stack reactants in advance. At the same time, the number of channels of the detection device can be updated according to the actual number of channels of the inspection module 106, and the operation is safe and simple.

[0038] In a preferred embodiment, a compensation module 104 is further included. The compensation module 104 is connected to the inspection module 106 and is used to provide a voltage compensation signal. The compensation module 104 is an external power supply for the CVM inspection module. The specific power supply is provided according to the CVM inspection module's power requirements, generally a 9-36V DC power supply.

[0039] In a preferred embodiment, the system further includes a data processing module 105, which is electrically connected to a patrol inspection module 106. The patrol inspection module 106 detects the output circuit signal of the stack simulation voltage module 102, and the data processing module 105 is used to process the output circuit signal output by the stack simulation voltage module 102. The data processing module 105 is generally a computer. The computer and the CVM patrol inspection module communication protocol parsing tool can develop a host computer based on the CVM patrol inspection module communication protocol to detect the CVM patrol inspection module data feedback status and trigger the transmission of frames required by the CVM patrol inspection module.

[0040] In a preferred embodiment, the stack simulation voltage module 102 includes at least one constant current device, the specific number of which is determined by the reaction site and conditions of the actual fuel cell stack, and the voltage regulation module 103 includes an adjustable resistor matching the constant current device, and the constant current device and the matching adjustable resistor are connected with a corresponding opening and closing device for simulating the reaction state of the fuel cell stack. The inspection module can detect the output circuit signal of the stack simulation voltage module in real time. The constant current device is generally a 3V dry battery, and the adjustable resistor is a sliding resistor with a power of 500Ω and 10W.

[0041] The present invention also provides a fuel cell stack inspection method, which uses the fuel cell stack inspection device as described above. The specific flow chart is as follows: Figure 2 Shown, including:

[0042] S001. Close the corresponding opening and closing device to put the fuel cell stack inspection and detection device into working state;

[0043] In this embodiment, the on-off device is closed according to the fuel cell stack reaction conditions to simulate the fuel cell stack reaction state. When the on-off device is closed, the fuel cell stack inspection and detection device is in an operating state. The on-off device is a switch button. When the fuel cell stack inspection and detection device is not in use, all switch buttons can be disconnected. When in an operating state, all switch buttons are closed. During this process, the switch buttons can be used to simulate the disconnection state of the CVM inspection module, verify the circuit signal output by the CVM inspection module during operation, and display the fuel cell stack inspection and detection device's simulated fuel cell stack reaction state on a computer. The total voltage of the fuel cell stack inspection and detection device is detected by a voltage control and measurement module. The power supply within the fuel cell stack inspection and detection device uses a 3.0V, 5W dry cell battery as the stack simulation power supply module. A 10W resistor with a resistance of 500Ω is used as the adjustment knob for simulating stack voltage changes. The compensation unit is an external power supply for the inspection module. The specific requirements are based on the power supply requirements of the CVM inspection module during operation, generally a 9-36V DC power supply.

[0044] S002, adjusting the adjustable resistor to simulate the reaction state of the fuel cell stack;

[0045] In this embodiment, the adjustable resistor is adjusted according to the peak value detected by the inspection module to obtain the corresponding positive voltage value. When the inspection module needs to collect a negative voltage value, the wiring pin is replaced to obtain the negative voltage value. During the test, the adjustable resistor can be adjusted according to the detection peak value of the CVM inspection module. According to Ohm's law, the greater the resistance of the sliding transformer at one end detected by the CVM inspection module, the greater the voltage value, thereby achieving the purpose of adjusting the change of the value collected by the CVM inspection module. When it is necessary to test the negative voltage detection of the CVM inspection module, the negative voltage can be collected by appropriately replacing the wiring pin. The change state of the negative voltage can also be obtained by adjusting the adjustable resistor, which solves the problem of the inability to detect negative voltage in the prior art.

[0046] S003. The data processing module displays the output circuit signal output by the stack simulation voltage module to feed back the test verification result to the inspection module.

[0047] In this embodiment, the data processing module displays the circuit signal output by the inspection module. The data processing module is generally a computer system. The computer and the CVM inspection module communication protocol parsing tool can develop a host computer according to the CVM inspection module communication protocol to detect the data feedback status of the CVM inspection module and the trigger frame sending required by the CVM inspection module; the inspection module test verification results are fed back according to the circuit signal and the frame sending command, and at the same time, the channel number of the detection device can be updated according to the actual channel number of the CVM inspection module.

[0048] By closing the opening and closing device of the fuel cell stack inspection and detection device to control the channel, the fuel cell stack reaction state is simulated according to the fuel cell stack reaction conditions. The inspection module outputs the simulated fuel cell stack reaction state circuit related signal and transmits it to the data processing module, so as to realize the simulation of the fuel cell stack voltage change state under the actual working state. During the detection process, the channel number of the detection device is updated according to the actual channel number of CVM. The operation process is safe and simple, and no assembly preparation is required in advance, which improves the channel sensitivity and reduces the verification cost of the inspection module.

[0049] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fuel cell stack inspection method, characterized in that: The method is applied to a patrol inspection device based on a fuel cell stack, and the device includes: a voltage control measurement module for measuring the total voltage value of the detection device; a stack simulation voltage module for simulating the voltage value of the fuel cell stack in the working state; a voltage regulation module, the voltage regulation module is electrically connected to the stack simulation voltage module and is used to adjust the change of the voltage value of the stack simulation voltage module in the working state; an inspection module is used to connect to the stack simulation voltage module and detect the output circuit signal of the stack simulation voltage module in real time; and also includes a data processing module, the data processing module is electrically connected to the patrol inspection module and is used to process the output circuit signal output by the stack simulation voltage module; The method comprises: Close the corresponding opening and closing device to put the fuel cell stack inspection and detection device into working state; Adjusting the adjustable resistor to simulate the reaction state of the fuel cell stack; The data processing module displays the output circuit signal output by the stack simulation voltage module to feed back the test verification results of the inspection module; wherein, the adjustable resistor is adjusted to simulate the reaction state of the fuel cell stack, specifically including adjusting the adjustable resistor according to the peak value detected by the inspection module to obtain the corresponding positive voltage value, and replacing the wiring pins when the inspection module needs to collect the negative voltage value to obtain the negative voltage value.

2. The fuel cell stack inspection method according to claim 1, characterized in that: Closing the corresponding opening and closing device to put the fuel cell stack inspection and detection device into an operating state; specifically, closing the opening and closing device according to the fuel cell stack reaction condition to simulate the fuel cell stack reaction state; When the opening and closing device is in the closed state, the fuel cell stack inspection and detection device is in the working state; It also includes starting a compensation unit according to the working state of the inspection unit to provide a 9-36V DC power supply to the inspection unit.

3. The fuel cell stack inspection method according to claim 1, characterized in that: Adjust the adjustable resistor to simulate the reaction state of the fuel cell stack; specifically, According to the peak value detected by the inspection module, the adjustable resistor can be adjusted to obtain the corresponding positive voltage value. When the inspection module needs to collect negative voltage values, the negative voltage values can be obtained by swapping the wiring pins.

4. The fuel cell stack inspection method according to claim 1, characterized in that: The data processing module displays the output circuit signal of the stack simulation voltage module to feedback the test verification results of the inspection module, including: The data processing module displays the output circuit signal of the stack simulation voltage module and processes the trigger frame sending command required by the inspection module; Send commands based on output circuit signals and frames to obtain inspection module test verification results.

5. The fuel cell stack inspection method according to claim 1, characterized in that: The device further includes a compensation module connected to the inspection module for providing a voltage compensation signal.

6. The fuel cell stack inspection method according to claim 1, characterized in that: The stack simulation voltage module includes at least one constant current device.

7. The fuel cell stack inspection method according to claim 3, characterized in that: The voltage regulating module includes an adjustable resistor matched with the constant current device.

8. The fuel cell stack inspection method according to claim 4, characterized in that: The constant current device and the matching adjustable resistor are connected with corresponding opening and closing devices to simulate the reaction state of the fuel cell stack. The constant current device is a 3V dry battery and the adjustable resistor is a 500Ω sliding resistor.

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