CN115421059A - Device for collecting voltage and impedance of fuel cell stack and control method - Google Patents
Device for collecting voltage and impedance of fuel cell stack and control method Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000007689 inspection Methods 0.000 claims abstract description 34
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- 238000002847 impedance measurement Methods 0.000 claims description 12
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
- H01M8/04552—Voltage of the individual fuel cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04634—Other electric variables, e.g. resistance or impedance
- H01M8/04641—Other electric variables, e.g. resistance or impedance of the individual fuel cell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention provides a device for collecting voltage and impedance of a fuel cell stack and a control method. Wherein, gather the device of fuel cell pile voltage and impedance, include: the device comprises a fuel cell controller, a voltage inspection device, a fuel cell and a DC/DC circuit; the voltage inspection device comprises an MCU, a voltage signal processing circuit, a band-pass signal processing circuit and a channel switching circuit; the fuel cell is respectively and electrically connected with the voltage inspection device and the DC/DC circuit, and the fuel cell controller is respectively and electrically connected with the voltage inspection device and the DC/DC circuit; the channel switching circuit is respectively electrically connected with the voltage signal processing circuit and the band-pass signal processing circuit, the voltage signal processing circuit and the band-pass signal processing circuit are both electrically connected with the MCU, and the MCU is electrically connected with the channel switching circuit. The function of synchronously acquiring the single-chip voltage and the single-chip impedance is realized, so that the problems of over-dryness, over-humidity or air shortage of the galvanic pile and the like are avoided, and the purpose of prolonging the service life of the galvanic pile is achieved.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a device for collecting voltage and impedance of a fuel cell stack and a control method.
Background
At present, the health state of a fuel cell is mainly reflected on the single voltage and alternating current impedance of the fuel cell, and the CVM can not simultaneously acquire the voltage acquisition and the impedance acquisition of a single cell of a galvanic pile in the operation process of a fuel cell system. During operation of the fuel cell, factors such as poor operating conditions and mechanical damage can cause the cell voltage and the ac impedance of the fuel cell to change. The prior art can not collect voltage and impedance at the same time, and the problems of over-dryness, over-humidity or air shortage and the like of the fuel cell exist due to untimely collection of the voltage and the impedance, so that the service life of the galvanic pile is influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device for collecting the voltage and the impedance of a fuel cell stack and a control method, which at least partially solve the problem that the service life of the stack is influenced by the problems of over-dryness, over-humidity or air shortage of the fuel cell in the prior art.
In a first aspect, an embodiment of the present disclosure provides an apparatus for acquiring a voltage and an impedance of a fuel cell stack, including: the device comprises a fuel cell controller, a voltage inspection device, a fuel cell and a DC/DC circuit;
the voltage inspection device comprises an MCU, a voltage signal processing circuit, a band-pass signal processing circuit and a channel switching circuit;
the fuel cell is respectively and electrically connected with the voltage inspection device and the DC/DC circuit, and the fuel cell controller is respectively and electrically connected with the voltage inspection device and the DC/DC circuit;
the channel switching circuit is respectively electrically connected with the voltage signal processing circuit and the band-pass signal processing circuit, the voltage signal processing circuit and the band-pass signal processing circuit are both electrically connected with the MCU, and the MCU is electrically connected with the channel switching circuit.
Optionally, the fuel cell controller communicates with the voltage inspection device through a CAN bus, and the DC/DC circuit of the fuel cell controller communicates through the CAN bus.
Optionally, the band-pass signal processing circuit is electrically connected to the resistor R1.
Optionally, the channel switching circuit includes a plurality of switches, and the plurality of switches are connected in parallel.
Optionally, the voltage signal processing circuit includes an operational amplifier A1, an operational amplifier A2, and an operational amplifier A3;
the inverting input end of the operational amplifier A1 is connected with a resistor R2 in series, the non-inverting input end of the operational amplifier A1 is connected with a resistor R3 in series, a resistor R4, a resistor R5 and a capacitor C3 are sequentially connected between the output end of the operational amplifier A1 and the non-inverting input end of the operational amplifier A2 in series, a resistor R7 is connected between the inverting input end of the operational amplifier A2 and the ground in series, a resistor R8 is connected between the inverting input end of the operational amplifier A2 and the output end of the operational amplifier A2 in series, a resistor R10 is connected between the output end of the operational amplifier A2 and the non-inverting input end of the operational amplifier A3 in series, a resistor R9 is connected between the inverting input end of the operational amplifier A3 and the ground in series, and a resistor R12 is connected between the inverting input end of the operational amplifier A3 and the output end of the operational amplifier A3 in series.
Optionally, a capacitor C1 is connected in series between a node between the resistor R4 and the resistor R5 and the ground, a capacitor C2 is connected in series between a node between the resistor R5 and the capacitor C3 and the ground, and a resistor R6 is connected in series between the non-inverting input terminal of the operational amplifier A2 and the ground.
Optionally, the band-pass signal processing circuit includes an operational amplifier A4 and an operational amplifier A5, wherein an inverting input end of the operational amplifier A4 is connected in series with a resistor R13, a non-inverting input end of the operational amplifier A4 is connected in series with a resistor R14, a resistor R16 is connected between an output end of the operational amplifier A4 and the non-inverting input end of the operational amplifier A5 in series, a resistor R15 is connected between the inverting input end of the operational amplifier A5 and ground in series, and a resistor R17 is connected between the inverting input end of the operational amplifier A5 and the output end of the operational amplifier A5 in series.
In a second aspect, an embodiment of the present disclosure further provides a control method for a device for acquiring a voltage and an impedance of a fuel cell stack, which is applied to any one of the devices in the first aspect, where the method includes that, when a fuel cell system is normally powered on, a fuel cell controller sends a voltage acquisition command to a voltage inspection device through a CAN bus; the CORE1 of the voltage inspection device responds to a voltage acquisition instruction, and the MCU of the voltage inspection device selects a channel through the control channel switching circuit, so that the selected single-chip voltage is acquired through the voltage signal processing circuit, and the acquired single-chip voltage is sent to the fuel cell controller through the CAN bus.
Optionally, the control method further includes: when alternating current impedance measurement is needed, the fuel cell controller sends a voltage acquisition command to the voltage inspection device through the CAN; when the CORE1 of the voltage inspection device controls the channel switching circuit to complete channel switching, the CORE1 conducts voltage collection through the voltage signal processing circuit, then the CORE1 transmits a channel switching signal to the CORE2, the CORE2 controls the channel switching circuit to switch the channel to the band-pass signal processing circuit, and the CORE2 conducts alternating current impedance measurement and calculation based on an output result of the band-pass signal processing circuit.
Optionally, the ac impedance measurement and calculation includes voltage and current calculation and FFT operation.
The invention provides a device for collecting voltage and impedance of a fuel cell stack and a control method. The device for collecting the voltage and the impedance of the fuel cell stack comprises a voltage signal processing circuit, a band-pass signal processing circuit and a channel switching circuit, wherein the voltage signal processing circuit is selected to collect the single-chip voltage through the channel switching circuit, the band-pass signal processing circuit is selected to collect the single-chip impedance, and under the running condition of a fuel cell system, the function of synchronously collecting the single-chip voltage and the single-chip impedance is realized, so that the problems of over-dry, over-wet or gas shortage of the stack and the like are avoided, and the purpose of prolonging the service life of the stack is achieved.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
Fig. 1 is a circuit diagram of an apparatus for collecting voltage and impedance of a fuel cell stack according to an embodiment of the present disclosure;
fig. 2 is a circuit diagram of a channel switching circuit provided in an embodiment of the present disclosure;
fig. 3 is a circuit diagram of a voltage signal processing circuit provided in an embodiment of the present disclosure;
figure 4 is a circuit diagram of a bandpass signal processing circuit provided by an embodiment of the present disclosure;
fig. 5 and 6 are flowcharts of a control method provided in an embodiment of the present disclosure.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
It is to be understood that the embodiments of the present disclosure are described below by way of specific examples, and that other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be further noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present disclosure, and the drawings only show the components related to the present disclosure rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, number and proportion of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
Word interpretation:
FC: a fuel cell;
and (4) FCU: a fuel cell controller;
CVM: a voltage inspection device;
and (4) Load: a load;
core: a core of a processor.
As shown in fig. 1, the present embodiment discloses an apparatus for collecting voltage and impedance of a fuel cell stack, which includes: the device comprises a fuel cell controller, a voltage inspection device, a fuel cell and a DC/DC circuit;
the voltage inspection device comprises an MCU, a voltage signal processing circuit, a band-pass signal processing circuit and a channel switching circuit;
the fuel cell is respectively and electrically connected with the voltage inspection device and the DC/DC circuit, and the fuel cell controller is respectively and electrically connected with the voltage inspection device and the DC/DC circuit;
the channel switching circuit is respectively electrically connected with the voltage signal processing circuit and the band-pass signal processing circuit, the voltage signal processing circuit and the band-pass signal processing circuit are both electrically connected with the MCU, and the MCU is electrically connected with the channel switching circuit.
Optionally, the fuel cell controller communicates with the voltage inspection device through a CAN bus, and the DC/DC circuit of the fuel cell controller communicates through the CAN bus.
Optionally, the band-pass signal processing circuit is electrically connected to the resistor R1.
Optionally, as shown in fig. 2, the channel switching circuit includes a plurality of switches, and the plurality of switches are connected in parallel.
Optionally, as shown in fig. 3, the voltage signal processing circuit includes an operational amplifier A1, an operational amplifier A2, and an operational amplifier A3;
the inverting input end of the operational amplifier A1 is connected with a resistor R2 in series, the non-inverting input end of the operational amplifier A1 is connected with a resistor R3 in series, a resistor R4, a resistor R5 and a capacitor C3 are sequentially connected between the output end of the operational amplifier A1 and the non-inverting input end of the operational amplifier A2 in series, a resistor R7 is connected between the inverting input end of the operational amplifier A2 and the ground in series, a resistor R8 is connected between the inverting input end of the operational amplifier A2 and the output end of the operational amplifier A2 in series, a resistor R10 is connected between the output end of the operational amplifier A2 and the non-inverting input end of the operational amplifier A3 in series, a resistor R9 is connected between the inverting input end of the operational amplifier A3 and the ground in series, and a resistor R12 is connected between the inverting input end of the operational amplifier A3 and the output end of the operational amplifier A3 in series.
Optionally, a capacitor C1 is connected in series between a node between the resistor R4 and the resistor R5 and the ground, a capacitor C2 is connected in series between a node between the resistor R5 and the capacitor C3 and the ground, and a resistor R6 is connected in series between the non-inverting input terminal of the operational amplifier A2 and the ground.
Optionally, as shown in fig. 4, the bandpass signal processing circuit includes an operational amplifier A4 and an operational amplifier A5, an inverting input terminal of the operational amplifier A4 is connected in series with a resistor R13, a non-inverting input terminal of the operational amplifier A4 is connected in series with a resistor R14, a resistor R16 is connected in series between an output terminal of the operational amplifier A4 and the non-inverting input terminal of the operational amplifier A5, a resistor R15 is connected in series between the inverting input terminal of the operational amplifier A5 and ground, and a resistor R17 is connected in series between the inverting input terminal of the operational amplifier A5 and an output terminal of the operational amplifier A5.
The MCU is a dual-core MCU. A capacitor C1 is connected between a node between the resistor R4 and the resistor R5 and the ground in series, a capacitor C2 is connected between a node between the resistor R5 and the capacitor C3 and the ground in series, and a resistor R6 is connected between the non-inverting input end of the operational amplifier A2 and the ground in series. The non-inverting input end of the operational amplifier A3 and the voltage V REF1 And a resistor R11 is connected in series between the two. The non-inverting input end of the operational amplifier A5 and the voltage V REF2 And a resistor R18 is connected in series between them.
The single-chip voltage acquisition adopts a differential operational amplifier circuit, so that high-precision single-chip voltage acquisition is realized; the single-chip impedance spectrum adopts a differential operational amplifier, a band-pass signal processing circuit and an amplifying circuit, so that the measurement of the impedance spectrum of any single chip with different frequencies is realized; the function of simultaneously carrying out single-chip voltage acquisition and impedance measurement calculation is realized. Contributing to improvement of the reliability of the fuel cell.
As shown in fig. 5, the present embodiment further discloses a control method of a device for collecting voltage and impedance of a fuel cell stack, which is applied to the device disclosed in the present embodiment, and the method includes that when a fuel cell system is normally powered on, a fuel cell controller sends a voltage collecting instruction to a voltage inspection device through a CAN bus; the CORE1 of the voltage inspection device responds to a voltage acquisition instruction, and the MCU of the voltage inspection device selects a channel through the control channel switching circuit, so that the selected single-chip voltage is acquired through the voltage signal processing circuit, and the acquired single-chip voltage is sent to the fuel cell controller through the CAN bus.
Optionally, as shown in fig. 6, the control method further includes: when alternating current impedance measurement is needed, the fuel cell controller sends a voltage acquisition command to the voltage inspection device through the CAN; when the CORE1 of the voltage inspection device controls the channel switching circuit to complete channel switching, the CORE1 conducts voltage collection through the voltage signal processing circuit, then the CORE1 transmits a channel switching signal to the CORE2, the CORE2 controls the channel switching circuit to switch the channel to the band-pass signal processing circuit, and the CORE2 conducts alternating current impedance measurement and calculation based on an output result of the band-pass signal processing circuit.
Optionally, the ac impedance measurement and calculation includes voltage and current calculation and FFT operation.
In a specific example, 1, when a fuel cell system is normally powered on, an FCU sends a voltage acquisition command to a CVM (constant voltage management) through a CAN (controller area network); and the CORE1 of the CVM responds to the voltage acquisition command and selects a channel by controlling the channel switching module.
2. When alternating current impedance measurement is needed, the FCU sends a voltage acquisition command to the CVM through the CAN; after the channel switching is finished, voltage acquisition is carried out by the CORE1, a channel switching signal is transmitted to the CORE2 by the CORE1, and alternating current impedance measurement and calculation including voltage and current calculation and FFT operation are carried out by the CORE 2; and the acquisition frequencies of the CORE1 and the CORE2 are matched to ensure the acquisition synchronism, and the next round of instruction response is carried out after the dual-CORE acquisition and calculation are finished.
The current disturbance can realize the disturbance of different frequencies through DCDC, carry on the impedance spectrum measurement of the monolithic; the band-pass signal processing circuit comprises a differential circuit, low-pass and high-pass filtering and signal amplification. Finally, the synchronous measurement of the alternating current impedance of the single-chip voltage and any single chip with different frequencies is realized, the over-dry, over-wet, air shortage and the like of the galvanic pile are avoided, and the service life of the galvanic pile is prolonged.
In the embodiment, the measurement of the alternating current impedance spectrum of any single chip with different frequencies is realized through the channel switching circuit, the band-pass signal processing circuit and the control of DC/DC current signal disturbance, and the reliability of the fuel cell is improved.
The foregoing describes the general principles of the present disclosure in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present disclosure are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present disclosure. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the disclosure is not intended to be limited to the specific details so described.
In the present disclosure, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions, and the block diagrams of devices, apparatuses, devices, systems, and apparatuses herein referred to are used merely as illustrative examples and are not intended to require or imply that the connections, arrangements, configurations, etc. must be made in the manner shown in the block diagrams. These devices, apparatuses, devices, systems may be connected, arranged, configured in any manner, as will be appreciated by one skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. As used herein, the words "or" and "refer to, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".
Also, as used herein, "or" as used in a listing of items beginning with "at least one" indicates a separate listing, such that, for example, a listing of "at least one of a, B, or C" means a or B or C, or AB or AC or BC, or ABC (i.e., a and B and C). Furthermore, the word "exemplary" does not mean that the described example is preferred or better than other examples.
It is also noted that in the systems and methods of the present disclosure, components or steps may be decomposed and/or re-combined. Such decomposition and/or recombination should be considered as equivalents of the present disclosure.
Various changes, substitutions and alterations to the techniques described herein may be made without departing from the techniques of the teachings as defined by the appended claims. Moreover, the scope of the claims of the present disclosure is not limited to the particular aspects of the process, machine, manufacture, composition of matter, means, methods and acts described above. Processes, machines, manufacture, compositions of matter, means, methods, or acts, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or acts.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the disclosure to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.
Claims (10)
1. An apparatus for collecting fuel cell stack voltage and impedance, comprising: the device comprises a fuel cell controller, a voltage inspection device, a fuel cell and a DC/DC circuit;
the voltage inspection device comprises an MCU, a voltage signal processing circuit, a band-pass signal processing circuit and a channel switching circuit;
the fuel cell is respectively and electrically connected with the voltage inspection device and the DC/DC circuit, and the fuel cell controller is respectively and electrically connected with the voltage inspection device and the DC/DC circuit;
the channel switching circuit is respectively electrically connected with the voltage signal processing circuit and the band-pass signal processing circuit, the voltage signal processing circuit and the band-pass signal processing circuit are both electrically connected with the MCU, and the MCU is electrically connected with the channel switching circuit.
2. The apparatus of claim 1 wherein the fuel cell controller communicates with the voltage patrol device via a CAN bus and the fuel cell controller DC/DC circuit communicates via the CAN bus.
3. The apparatus for collecting voltage and impedance of fuel cell stack according to claim 1, wherein the band-pass signal processing circuit is electrically connected to the resistor R1.
4. The apparatus of claim 1, wherein the channel switching circuit comprises a plurality of switches, and wherein the plurality of switches are connected in parallel.
5. The device for acquiring the voltage and the impedance of the fuel cell stack according to claim 1, wherein the voltage signal processing circuit comprises an operational amplifier A1, an operational amplifier A2 and an operational amplifier A3;
the inverting input end of the operational amplifier A1 is connected with a resistor R2 in series, the non-inverting input end of the operational amplifier A1 is connected with a resistor R3 in series, a resistor R4, a resistor R5 and a capacitor C3 are sequentially connected between the output end of the operational amplifier A1 and the non-inverting input end of the operational amplifier A2 in series, a resistor R7 is connected between the inverting input end of the operational amplifier A2 and the ground in series, a resistor R8 is connected between the inverting input end of the operational amplifier A2 and the output end of the operational amplifier A2 in series, a resistor R10 is connected between the output end of the operational amplifier A2 and the non-inverting input end of the operational amplifier A3 in series, a resistor R9 is connected between the inverting input end of the operational amplifier A3 and the ground in series, and a resistor R12 is connected between the inverting input end of the operational amplifier A3 and the output end of the operational amplifier A3 in series.
6. The device for acquiring the voltage and the impedance of the fuel cell stack according to claim 5, wherein a capacitor C1 is connected between a node between the resistor R4 and the resistor R5 and the ground in series, a capacitor C2 is connected between a node between the resistor R5 and the capacitor C3 and the ground in series, and a resistor R6 is connected between a non-inverting input end of the amplifier A2 and the ground in series.
7. The device for acquiring the voltage and the impedance of the fuel cell stack according to claim 1, wherein the band-pass signal processing circuit comprises an operational amplifier A4 and an operational amplifier A5, a resistor R13 is connected in series with an inverting input terminal of the operational amplifier A4, a resistor R14 is connected in series with a non-inverting input terminal of the operational amplifier A4, a resistor R16 is connected in series between an output terminal of the operational amplifier A4 and the non-inverting input terminal of the operational amplifier A5, a resistor R15 is connected in series between the inverting input terminal of the operational amplifier A5 and the ground, and a resistor R17 is connected in series between the inverting input terminal of the operational amplifier A5 and the output terminal of the operational amplifier A5.
8. A control method of a device for collecting voltage and impedance of a fuel cell stack is applied to the device of any one of claims 1 to 7, and is characterized in that when a fuel cell system is normally powered on, a fuel cell controller sends a voltage collection command to a voltage inspection device through a CAN bus; the CORE1 of the voltage inspection device responds to a voltage acquisition instruction, and the MCU of the voltage inspection device selects a channel through the control channel switching circuit, so that the selected single-chip voltage is acquired through the voltage signal processing circuit, and the acquired single-chip voltage is sent to the fuel cell controller through the CAN bus.
9. The control method according to claim 8, characterized by further comprising:
when alternating current impedance measurement is needed, the fuel cell controller sends a voltage acquisition command to the voltage inspection device through the CAN; when the CORE1 of the voltage inspection device controls the channel switching circuit to complete channel switching, the CORE1 carries out voltage acquisition through the voltage signal processing circuit, then the CORE1 transmits a channel switching signal to the CORE2, the CORE2 controls the channel switching circuit to switch the channel to the band-pass signal processing circuit, and the CORE2 carries out alternating current impedance measurement and calculation based on an output result of the band-pass signal processing circuit.
10. The control method of claim 9, wherein the ac impedance measurements and calculations comprise voltage and current calculations and FFT operations.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211382077.0A CN115421059A (en) | 2022-11-07 | 2022-11-07 | Device for collecting voltage and impedance of fuel cell stack and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211382077.0A CN115421059A (en) | 2022-11-07 | 2022-11-07 | Device for collecting voltage and impedance of fuel cell stack and control method |
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| CN115421059A true CN115421059A (en) | 2022-12-02 |
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| CN202211382077.0A Pending CN115421059A (en) | 2022-11-07 | 2022-11-07 | Device for collecting voltage and impedance of fuel cell stack and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3143116A1 (en) * | 2022-12-13 | 2024-06-14 | Commissariat à l'énergie atomique et aux énergies alternatives | Device for protecting a multiplexing card |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643390A (en) * | 2002-03-29 | 2005-07-20 | 洁能氏公司 | System and method for measuring fuel cell voltage and high frequency resistance |
| CN101303396A (en) * | 2007-05-09 | 2008-11-12 | 比亚迪股份有限公司 | System for monitoring fuel battery performance |
| US20090075127A1 (en) * | 2007-09-17 | 2009-03-19 | Gm Global Technology Operations, Inc. | Method for measuring high-frequency resistance of fuel cell in a vehicle |
| CN102508035A (en) * | 2011-11-01 | 2012-06-20 | 武汉理工大学 | Fuel cell AC impedance on-line testing system and measuring and controlling method |
| CN115032553A (en) * | 2022-05-25 | 2022-09-09 | 上海氢晨新能源科技有限公司 | On-line diagnosis method and system for vehicle-mounted fuel cell |
-
2022
- 2022-11-07 CN CN202211382077.0A patent/CN115421059A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643390A (en) * | 2002-03-29 | 2005-07-20 | 洁能氏公司 | System and method for measuring fuel cell voltage and high frequency resistance |
| CN101303396A (en) * | 2007-05-09 | 2008-11-12 | 比亚迪股份有限公司 | System for monitoring fuel battery performance |
| US20090075127A1 (en) * | 2007-09-17 | 2009-03-19 | Gm Global Technology Operations, Inc. | Method for measuring high-frequency resistance of fuel cell in a vehicle |
| CN102508035A (en) * | 2011-11-01 | 2012-06-20 | 武汉理工大学 | Fuel cell AC impedance on-line testing system and measuring and controlling method |
| CN115032553A (en) * | 2022-05-25 | 2022-09-09 | 上海氢晨新能源科技有限公司 | On-line diagnosis method and system for vehicle-mounted fuel cell |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3143116A1 (en) * | 2022-12-13 | 2024-06-14 | Commissariat à l'énergie atomique et aux énergies alternatives | Device for protecting a multiplexing card |
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Application publication date: 20221202 |