CN209104280U - Distributed Test System for Solid Oxide Fuel Cells - Google Patents

Abstract

The utility model discloses the distributed test systems for solid oxide fuel cell, it include: the signal acquisition unit of the equipment and at least one solid oxide fuel cell that need to acquire signal when being connected to on-road emission test, the signal acquisition unit includes current signal collection module, voltage signal acquisition module, thermocouple signal acquisition module, digital signal acquiring module, the signal acquisition unit is by the current signal of acquisition, voltage signal, thermocouple signal, digital signal is summarized by time-sensitive network to industrial ethernet switch, the industrial ethernet switch sends data to monitoring modular again.Using distributed arrangement, each signal acquisition module is respectively placed in around each sensor, reduces cabling, and system structure is light, easy for installation, is brought great convenience for the monitoring of solid oxide fuel cell.

Description

Distributed Test System for Solid Oxide Fuel Cells

technical field

The present disclosure relates to the field of monitoring technology, and in particular, to a distributed testing system suitable for solid oxide fuel cells.

Background technique

Solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC for short) is a device that directly converts chemical energy stored in fuel into electrical energy at high temperature. SOFC has very obvious advantages as a power generation device: it can use different fuels, such as hydrogen and hydrocarbons, etc.; the substances produced are environmentally friendly water and carbon dioxide, and the amount of carbon dioxide produced compared with traditional energy sources greatly reduced; the working temperature of SOFC is relatively high, generally between 600 ° C and 1000 ° C, the energy conversion efficiency is as high as 70%, which is twice that of the current traditional power generation technology, and there is an additional 20% heat recovery, which can achieve high-efficiency thermoelectricity Joint supply; since all parts of the battery are all solid, there is no leakage, pollution and other problems.

The entire process from pre-development of SOFC to post-validation and manufacturing is inseparable from the fuel cell test system: in the R&D stage, the test system helps to characterize and optimize the energy output to improve the life and robustness of the cell; in the validation stage, the test The system helps optimize the design to reduce costs for mass production; in the manufacturing stage, the test system is used to monitor whether the battery meets the design specifications.

Solid oxide fuel cells involve electrochemistry, electrical engineering, thermodynamics and fluid mechanics. When testing fuel cells, it is necessary to collect signals such as temperature, pressure, voltage, and current. The current solid oxide fuel cell test systems mostly adopt a centralized design. Due to the various types of test signals, the processing and acquisition modules of each type of sensor are also different. When the system monitors multiple solid oxide fuel cell stacks at the same time, or when the system monitors vehicle fuel cells, the number of modules monitored by the system is large, the number of sensors is large, the test system is bulky, the sensor wiring is inconvenient, and the scalability is poor. Whether it is in the research and development stage of the fuel cell, or in the verification and manufacturing stage, it brings difficulties to the large-scale testing and analysis of the battery.

It can be seen that most of the existing solid oxide fuel cell monitoring systems adopt a centralized layout, and the signals collected by all sensors are transmitted to the general collection module, and the collected signal data is then subjected to subsequent analysis and processing. Under this layout, the number of stacks or devices monitored each time is limited, the volume is huge, and the wiring is inconvenient. This disadvantage is especially obvious when monitoring multiple stacks at the same time or as an on-board monitoring system. Troubleshooting is more difficult when there is a problem with a sensor signal. The scalability is poor, and it is extremely inconvenient to add or remove monitoring items, which greatly wastes manpower and material resources.

Therefore, it is necessary to design a fuel cell test system that can overcome this problem.

Utility model content

In order to solve the deficiencies of the prior art, the present disclosure provides a distributed testing system suitable for solid oxide fuel cells, and a distributed structure is adopted to realize the testing of solid oxide fuel cells.

In order to achieve the above object, the application adopts the following technical solutions:

Distributed test systems for solid oxide fuel cells, including:

It is connected to a device that needs to collect signals during vehicle-mounted testing and at least one signal acquisition unit of a solid oxide fuel cell, the signal acquisition unit includes a current signal acquisition module, a voltage signal acquisition module, a thermocouple signal acquisition module, and a digital signal acquisition module, The signal acquisition unit summarizes the collected current signal, voltage signal, thermocouple signal, and digital signal to the industrial Ethernet switch through a time-sensitive network (TSN for short), and the industrial Ethernet switch transmits the data to the The monitoring module, wherein each signal acquisition module is independent of each other and is distributed in a distributed arrangement.

When carrying out on-board testing of solid oxide fuel cells, the equipment that needs to collect signals can be connected to each signal acquisition module.

In a further technical solution, the industrial Ethernet switch transmits the data to the monitoring module through the time-sensitive network TSN, and also transmits the data to the storage unit for storage.

The time-sensitive network can integrate different types of devices and different types of communication, and can realize real-time interaction of various communication devices. At the same time, the synchronization of the data collected by each device can be ensured, which provides a guarantee for accurate monitoring and analysis.

In a further technical solution, the current signal acquisition module includes several current signal sensors, a current signal acquisition card and an independent power supply module;

Several current signal sensors are connected to the current signal acquisition card, and an independent power module supplies power for several current signal sensors and the current signal acquisition card;

The current signal acquisition card converts the current signal collected by each current signal sensor into a digital signal and transmits it to an industrial Ethernet switch through a time-sensitive network. The circuit used by the current signal acquisition card in this module is a voltage and current signal acquisition circuit.

In a further technical solution, the voltage signal acquisition module includes several voltage signal sensors, a voltage signal acquisition card and an independent power supply module.

Several voltage signal sensors are connected to the voltage signal acquisition card, and an independent power supply module supplies power for the several voltage signal sensors and the voltage signal acquisition card.

The voltage signal acquisition card converts the voltage signal collected by each voltage signal sensor into a digital signal and transmits it to an industrial Ethernet switch through a time-sensitive network. The circuit adopted by the voltage signal acquisition card of the voltage signal acquisition module in this module is a voltage and current signal acquisition circuit.

In a further technical solution, the thermocouple signal acquisition module includes several thermocouple signal sensors, a thermocouple signal acquisition card and an independent power supply module.

Several thermocouple signal sensors are connected to the thermocouple signal acquisition card, and an independent power supply module supplies power for the several thermocouple signal sensors and the thermocouple signal acquisition card.

In a further technical solution, the digital signal acquisition module includes several digital signal sensors, a digital signal acquisition card and an independent power supply module.

Several digital signal sensors are connected to the digital signal acquisition card, and an independent power supply module supplies power for the several digital signal sensors and the digital signal acquisition card.

In a further technical solution, the circuits used by the current signal acquisition card in the current signal acquisition module and the voltage signal acquisition card in the voltage signal acquisition module are voltage and current signal acquisition circuits. This circuit adopts LMV358 chip, which can realize the collection of current signal, low voltage signal and high voltage signal. When the collected signal is a current signal, it is converted into a voltage signal through a precision resistor, and then converted into a voltage of 1~5V through an operational amplifier circuit. signal; when the collected signal is a weak voltage signal, it is converted into a stable voltage signal of 1~5V by adjusting the amplification factor of the operational amplifier circuit; when the collected signal is a voltage signal exceeding 5V, the precision voltage divider resistor The voltage signal is collected within 5V when the voltage is reduced, and the subsequent circuit is protected by a Zener diode, and the interference signal is reduced by a filter capacitor.

In a further technical solution, the thermocouple signal acquisition card in the thermocouple signal acquisition module converts the thermocouple signals collected by each thermocouple signal sensor into digital signals and transmits them to the industrial Ethernet switch through a time-sensitive network. The circuit used by the thermocouple signal acquisition card is a thermocouple signal acquisition circuit. In this circuit, the thermocouple signal is first filtered by the RC low-pass filter circuit to filter the high-frequency interference components in the signal, and then an instrumentation amplifier is used to amplify the input signal, and the amplified output signal is again processed by the RC low-pass filter. filter processing.

In a further technical solution, the digital signal acquisition card in the digital signal acquisition module collects the digital signals collected by the digital signal sensors and transmits them to the industrial Ethernet switch through a time-sensitive network. The circuit used by the digital signal acquisition card is a digital signal acquisition circuit. In this circuit, when the collected signal is a high-level signal, the triode is turned on, and the signal collected by the circuit is a voltage signal of 0V; when the collected signal is a low-level signal, the triode is closed, and the signal collected by the circuit is 5V voltage signal.

Embodiments of the present disclosure also disclose distributed testing methods applicable to solid oxide fuel cells, including:

When the solid oxide fuel cell vehicle test is carried out, the equipment that needs to collect signals is connected to each signal acquisition module;

The signal acquisition unit aggregates the collected current signal, voltage signal, thermocouple signal, and digital signal to an industrial Ethernet switch through a time-sensitive network, and the industrial Ethernet switch transmits the data to the monitoring module;

Among them, when the acquisition signal is a current signal, it is converted into a voltage signal through a precision resistor, and then into a voltage signal of 1-5V through an operational amplifier circuit;

When the collected signal is a weak voltage signal, it can be converted into a stable 1-5V voltage signal by adjusting the magnification of the operational amplifier circuit;

When the collected signal is a voltage signal exceeding 5V, the voltage is first reduced to a voltage signal within 5V through a precision voltage dividing resistor for collection, and the subsequent circuit is protected by a zener diode, and the interference signal is reduced by a filter capacitor;

In the thermocouple signal acquisition circuit, the thermocouple signal is first filtered by the RC low-pass filter circuit to filter the high-frequency interference components in the signal, and then an instrumentation amplifier is used to amplify the input signal, and the amplified output signal uses RC again. low-pass filtering for filtering;

In the digital signal acquisition circuit, when the collected signal is a high-level signal, the triode is turned on, and the signal collected by the circuit is a 0V voltage signal; when the collected signal is a low-level signal, the triode is closed, and the circuit collected The signal is a voltage signal of 5V.

Compared with the prior art, the beneficial effects of the present disclosure are:

The present disclosure proposes a distributed monitoring system for solid oxide fuel cells. The system adopts a distributed layout, and each signal acquisition card is arranged near the signal acquisition sensor. The same type of signal is collected by the acquisition card and passes through the TSN time-sensitive network. It is stored and analyzed after being aggregated through Industrial Ethernet. The system structure is light, and the wiring and installation are convenient, which brings great convenience to the monitoring of solid oxide fuel cells, and has broad application prospects.

The monitoring system proposed by the present disclosure has good expansibility. Solid oxide fuel cells need to collect many signals in the stages of R&D, verification, and manufacturing. When adding or reducing the amount of collected signals, it is only necessary to connect or disconnect the corresponding signal acquisition card according to the signal type of the added or removed sensor. Just open, simple and convenient.

The present disclosure enables communication of data through a TSN time-sensitive network. TSN time-sensitive network can integrate different types of equipment, different types of communication, and can realize real-time interaction of various communication equipment. At the same time, the synchronization of the data collected by each device can be ensured, which provides a guarantee for accurate monitoring and analysis.

The present disclosure directly stores the collected signal data in a mobile hard disk via an industrial Ethernet switch and a TSN time-sensitive network for storage, and the stored data can be used for subsequent analysis and research.

Each module of the utility model has its own power supply module, which is convenient for wiring and installation.

Description of drawings

The accompanying drawings that form a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute improper limitations on the present application.

FIG. 1 is a structural diagram of a solid oxide fuel cell system according to some embodiments of the disclosure;

2 is a current and voltage signal acquisition circuit of some embodiments of the disclosure;

FIG. 3(a) is an RC low-pass filter circuit of some embodiments of the present disclosure;

FIG. 3(b) is a thermocouple signal acquisition circuit according to some embodiments of the present disclosure;

FIG. 4 is a digital signal acquisition circuit of some embodiments of the present disclosure.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

In a typical embodiment of the present application, a distributed test system suitable for solid oxide fuel cells is provided. The system adopts a distributed design, which is light in size, light in weight, simple in installation and wiring process, and convenient for adding or modifying modules. .

As shown in Figure 1, a distributed monitoring system suitable for solid oxide fuel cells includes one or more solid oxide fuel cells, equipment that needs to collect signals during on-board testing, a current signal acquisition module, and a voltage signal acquisition module , Thermocouple signal acquisition module, digital signal acquisition module, industrial Ethernet switch, solid state hard disk and monitoring module. One or more fuel cell stacks and the equipment that needs to collect signals during on-board testing are connected to the current signal acquisition module, the voltage signal acquisition module, the thermocouple signal acquisition module, and the digital signal acquisition module, and each acquisition module is connected to the industrial Ethernet. The network switches are connected through the TSN time-sensitive network, and the collected signal data is aggregated to the industrial Ethernet switches. The industrial Ethernet switch is connected to the solid-state hard disk and the monitoring module through TSN, and each signal is transmitted to the controller of the monitoring module to analyze and process the data, and the required data can be displayed on the display unit as needed; It is transferred to an industrial-grade solid-state hard disk for storage, which is convenient for subsequent analysis and processing.

In this embodiment, the TSN time-sensitive network can integrate different types of devices and different types of communication, and can realize real-time interaction of various communication devices. At the same time, the synchronization of the data collected by each device can be ensured, which provides a guarantee for accurate monitoring and analysis.

In a specific embodiment, FIG. 2 is a voltage and current signal acquisition circuit, which uses an LMV358 chip and can simultaneously acquire current signals, low-voltage signals and high-voltage signals. When the signal is a current signal, it can be converted into a voltage signal through a 250 ohm precision resistor, and then into a voltage signal of 1 to 5V through an operational amplifier circuit. When the signal is a weak voltage signal, it can be converted into a stable voltage signal of 1-5V by adjusting the magnification of the operational amplifier circuit. When the signal is a voltage signal exceeding 5V, the voltage is first reduced to a voltage signal within 5V through a precision voltage divider for acquisition. The subsequent circuit is protected by a 4.7V Zener diode, and the interference signal is reduced by a filter capacitor.

In a specific example, Figure 3(b) is a thermocouple signal acquisition circuit. The thermocouple signal first passes through an RC low-pass filter circuit as shown in Figure 3(a) to filter the high-frequency interference components in the signal. The input signal is weak, the system adopts AD620 instrumentation amplifier with higher precision to amplify the input signal. The AD620 features an 8-pin SOIC and DIP that can be packaged for portable applications, and its maximum supply current of only 1.3mA, with low power consumption, makes it ideal for battery operation. The AD620 has a high accuracy of up to 40ppm of nonlinearity, a low offset voltage of up to 50μV and an offset drift of up to 0.6μV/°C, making it an ideal choice for precision data acquisition systems. The magnification can be adjusted directly by adjusting the precision resistor between pin 1 and pin 8, and the accuracy can reach 0.15% when the magnification is 100. The output signal is filtered again by RC low-pass filtering to further improve the signal-to-noise ratio.

In a specific embodiment, FIG. 4 is a digital signal acquisition circuit. When the collected signal is a high-level signal, the triode is turned on, and the signal collected by the circuit is a 0V voltage signal. When the collected signal is a low-level signal, the triode is closed, and the signal collected by the circuit is a 5V voltage signal.

In the specific embodiment of the present disclosure, the system adopts a distributed structure, and each stack and the equipment that needs to collect signals when on-board are respectively connected with the current signal acquisition module, the voltage signal acquisition module, the thermocouple signal acquisition module, the digital signal acquisition and the communication module. connected. Each module is connected to the industrial Ethernet through a time-sensitive network, and the collected signals are transmitted to the monitoring module for analysis and processing; at the same time, the collected signal data is saved to the mobile hard disk. This distributed test system is light in size and weight, the installation and wiring process is simple, and it is convenient to add or modify modules.

In the specific embodiment of the present disclosure, the signals collected by each acquisition module and communication module are aggregated to the industrial Ethernet switch via the time sensitive network (TSN), and then transmitted to the solid-state hard disk via the TSN for storage, and simultaneously transmitted to the monitoring module for Analytical processing. There are many signals collected in a fuel cell, and multiple acquisition modules are required to complete the acquisition task. Each module can easily complete the daisy chain link through the integrated network switches distributed in each module, realizing the rapid installation and expansion of distributed applications. When there are many modules, the synchronization of the collected data between the modules is particularly important. Through TSN, the timing can be precisely synchronized on the network without the need for lengthy physical timing, which provides a strictly synchronized measurement guarantee for accurate measurement and analysis.

In the specific embodiment of the present disclosure, each of the above modules has an independent power supply module inside, which reduces wiring and facilitates connection and installation.

In the specific embodiment of the present disclosure, the industrial Ethernet switch and each signal acquisition module, monitoring module, and solid-state disk are connected through a TSN time-sensitive network, and the TSN time-sensitive network can integrate different types of equipment and different types of communication. At the same time, the synchronization of the data collected by each device can be ensured, which provides a guarantee for accurate monitoring and analysis.

In the specific embodiment of the present disclosure, a distributed layout is adopted, and each signal acquisition card is placed around each sensor, which reduces wiring, the system structure is light, and the installation is convenient, which brings great convenience to the monitoring of solid oxide fuel cells. .

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (9)

1. being suitable for the distributed test system of solid oxide fuel cell, characterized in that include:

Need to acquire the equipment of signal and the signal acquisition of at least one solid oxide fuel cell when being connected to on-road emission test Unit, the signal acquisition unit include current signal collection module, voltage signal acquisition module, thermocouple signal acquisition mould Block, digital signal acquiring module, the signal acquisition unit is by the current signal of acquisition, voltage signal, thermocouple signal, number Signal is summarized by time-sensitive network to industrial ethernet switch, and the industrial ethernet switch is sent data to again Monitoring modular；Wherein each signal acquisition module is mutually indepedent, is in distributed arrangement.

2. being suitable for the distributed test system of solid oxide fuel cell as described in claim 1, characterized in that described Data are transmitted to monitoring modular by time-sensitive network TSN by industrial ethernet switch, while being also transmitted to storage unit It is stored.

3. being suitable for the distributed test system of solid oxide fuel cell as described in claim 1, characterized in that described Current signal collection module includes several current signal sensors, a current signal capture card and an independent power supply mould Block；

Several current signal sensors are connected on current signal capture card, and independent power module is several current signals biography Sensor and the power supply of current signal capture card；

Current signal capture card passes through the time after the collected current signal of each current signal sensor is converted to digital signal Sensitive network is transmitted to industrial ethernet switch, and the circuit that current signal capture card uses is voltage and current signal acquisition electricity Road.

4. being suitable for the distributed test system of solid oxide fuel cell as described in claim 1, characterized in that described Voltage signal acquisition module includes several voltage signal sensors, a voltage signal acquisition card and an independent power supply mould Block；

Several voltage signal sensors are connected on voltage signal acquisition card, and independent power module is several voltage signals biography Sensor and the power supply of voltage signal acquisition card；

Voltage signal acquisition card passes through the time after the collected voltage signal of each voltage signal sensor is converted to digital signal Sensitive network is transmitted to industrial ethernet switch, and the circuit that voltage signal acquisition card uses is voltage and current signal acquisition electricity Road.

5. being suitable for the distributed test system of solid oxide fuel cell as described in claim 1, characterized in that described Thermocouple signal acquisition module includes several thermocouple signal sensors, a thermocouple signal acquisition card and one it is independent Power module；

Several thermocouple signal sensors are connected on thermocouple signal acquisition card, and independent power module is several thermocouples Signal transducer and the power supply of thermocouple signal acquisition card.

6. being suitable for the distributed test system of solid oxide fuel cell as described in claim 1, characterized in that described Digital signal acquiring module includes several digital signal sensors, a digital data acquisition card and an independent power supply mould Block；

Several digital signal sensors are connected to digital signal acquiring card, and independent power module is several digital signals sensing Device and the power supply of digital signal acquiring card.

7. the distributed test system suitable for solid oxide fuel cell as described in claim 3 or 4, characterized in that Voltage and current signal acquisition circuit uses LMV358 chip, it can be achieved that current signal, low voltage signal and high voltage signal Acquisition；

When acquiring signal is current signal, voltage signal is converted to by precision resistance, and then turn by operational amplification circuit Turn to the voltage signal of 1~5V；

When acquire signal be weak voltage signals when, by adjusting operational amplification circuit amplification factor be translated into it is stable The voltage signal of 1~5V；

When acquiring signal is the voltage signal more than 5V, the voltage that voltage is reduced within 5V by accurate divider resistance is first passed through Signal is acquired, and subsequent conditioning circuit is protected by zener diode, and reduces interference signal by filter capacitor.

8. being suitable for the distributed test system of solid oxide fuel cell as described in claim 1, characterized in that thermoelectricity The circuit that even data acquisition card uses is thermocouple signal acquisition circuit, and in thermocouple signal acquisition circuit, thermocouple signal is first It first passes through RC low-pass filter circuit to be filtered the High-frequency Interference ingredient in signal, afterwards using instrument amplifier to input Signal amplify processing, amplified output signal uses RC low-pass filtering to be filtered again.

9. being suitable for the distributed test system of solid oxide fuel cell as described in claim 1, characterized in that number The circuit that data acquisition card uses is digital signal acquiring circuit, in digital signal acquiring circuit, when the signal of acquisition is high electricity When ordinary mail, triode ON, the collected signal of circuit is the voltage signal of 0V；When the signal of acquisition is low level signal When, triode closure, the collected signal of circuit is the voltage signal of 5V.