CN212517270U - Single-cell inspection system of fuel cell - Google Patents
Single-cell inspection system of fuel cell Download PDFInfo
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- CN212517270U CN212517270U CN202021003385.4U CN202021003385U CN212517270U CN 212517270 U CN212517270 U CN 212517270U CN 202021003385 U CN202021003385 U CN 202021003385U CN 212517270 U CN212517270 U CN 212517270U
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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 utility model provides a single-chip battery polling system of a fuel battery, which comprises an optical coupler gating component, a signal processing component, a decoder component and a micro-control unit, the signal processing assembly comprises an operational amplifier assembly and a reference voltage source, the optical coupling gating assembly comprises at least n +1 optical coupling relays, the input ends of the n +1 optical coupling relays are sequentially connected with the negative electrodes and the positive electrodes of the n single-chip batteries, the output ends of the optical coupling relays with odd numbers are connected to the first input end of the signal processing assembly through current-limiting resistors, the output ends of the optical coupling relays with even numbers are connected to the second input end of the signal processing assembly through current-limiting resistors, the first input end and the second input end are respectively connected with the reference voltage source, the voltage Uref > Uin 2-Uin 1I of the reference voltage source is connected with the SPI communication interface of the micro control unit. The utility model has the advantages that: the circuit design is simplified and the expandability is strong.
Description
Technical Field
The utility model relates to a fuel cell vehicle field particularly, relates to a fuel cell's monolithic battery system of patrolling and examining.
Background
The hydrogen fuel cell is a power generation device which directly converts chemical energy generated by the reaction of hydrogen and oxygen into electric energy through electrochemical reaction, has the advantages of high power generation efficiency, small environmental pollution and the like, and is widely applied to the field of automobiles. The hydrogen fuel cell system itself is composed of many electrical components, including hydrogen fuel cell controllers, various sensors, various electromagnetic valves, electrical heating elements, and various pump bodies, so that the power distribution requirements for the electrical components of the whole system are higher and higher.
According to the power consumption requirement of vehicle-mounted application, a fuel cell stack is generally formed by connecting dozens of single cells in series, in the operation process of the fuel cell, the performance and safety of the whole fuel cell stack can be influenced by the abnormity of the single cells, and in order to ensure the normal operation of the fuel cell and evaluate the performance of the fuel cell, the operation parameters are monitored in real time. The voltage of the single-chip battery is the most direct reflection of the power generation performance of the battery, so that the single-chip battery is monitored in real time, the acquired single-chip voltage data is sent to the fuel cell main controller, and is displayed and stored, so that scientific research personnel can conveniently analyze and research the voltage of the single-chip battery, and the safe operation of a fuel cell system is maintained.
The current fuel cell monolithic voltage detection device mainly comprises three types: a resistance voltage division and multi-path analog switch method, an optical coupling relay method and a special acquisition chip method. When the resistor voltage division and multi-path analog switch method is used for measuring a large number of single chips, the measurement accuracy cannot meet the requirement due to overlarge errors, and the performance of the galvanic pile can be influenced by a large number of voltage division resistors.
Chinese patent 1(CN 105044440 a) adopts LTC6803 chip to collect the voltage of the fuel cell, and the LTC chip manual has already described that it has requirements on the total voltage of the object to be measured, and it must be ensured that the sum of the voltages of the individual cells is at least 10V to meet all electrical specifications, but each LTC chip in patent 1 only supports 12 individual cell voltage collection, but the normal operating voltage of the fuel cell is 0-1V, but the main operating voltage thereof is concentrated at 0.6-0.8V, so this scheme is not suitable for the fuel cell system originally.
The Chinese patent 2(CN 1746695A), the Chinese patent 3(CN 102288813A) and the Chinese patent 4(CN 108761350A) all adopt an optocoupler relay scheme. Chinese patent 2 adopts differential signal collection monomer voltage, but negative signal is directly eliminated to its absolute value circuit to the elimination accumulated potential that can be fine, but this patent has also increased a plurality of devices simultaneously, and circuit design is comparatively complicated, and the cost is relatively higher. The chinese patent 3 can measure positive and negative signals, effectively making up for the disadvantages of the chinese patent 2, but the method of the chinese patent 3 that one end is grounded after battery gating needs to use a decoder to perform synchronous odd-even control of a plurality of decoders, and the gating switching flow is complex. In addition, the operational amplifier in the Chinese patent 2 and the Chinese patent 3 adopts double power supplies, so that the cost is relatively high. The chinese patent 4 utilizes the odd-even conversion module to convert the negative voltage into the positive voltage for voltage collection, and the operational amplifier supplies power to the single power supply, which has the advantages of improved cost and simplified gating circuit compared with the chinese patent 2 and the chinese patent 3, but the odd-even conversion module is added, and the control of the gating circuit and the synchronous control of the odd-even conversion module are complicated and the cost is high.
In view of the foregoing, it would be desirable to provide a single cell routing inspection system for a fuel cell that overcomes the deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a fuel cell's monolithic battery system of patrolling and examining, it can overcome prior art's defect. The utility model discloses a utility model purpose can realize through following technical scheme.
An embodiment of the utility model provides a single-chip cell inspection system of fuel cell, wherein the external fuel cell that single-chip cell inspection system of fuel cell detected comprises a plurality of single-chip cells connected in series, single-chip cell inspection system of fuel cell includes opto-coupler gating subassembly, signal processing subassembly, decoder subassembly and little the control unit, the signal processing subassembly includes fortune and puts subassembly and reference voltage source, opto-coupler gating subassembly includes n +1 opto-coupler relay and numbers 0, 1 … n in proper order, the input of n +1 opto-coupler relay is connected with the negative pole and the positive pole of n single-chip cells of external fuel cell in proper order, the output of the opto-coupler relay that number is the odd number is connected to the first input of signal processing subassembly through current-limiting resistance, the output of the opto-coupler relay that number is the even number is connected to the second input of signal processing subassembly through current-limiting resistance, the first input end and the second input end are respectively connected with a reference voltage source, the voltage Uref > | Uin 2-Uin 1| of the reference voltage source is provided, wherein Uin1 is the voltage of the first input end, Uin2 is the voltage of the second input end, the output end of the signal processing assembly is connected with an SPI (serial peripheral interface) communication interface of the micro control unit, and a control port of the micro control unit is respectively connected with the control end of each optocoupler relay through a decoder assembly.
According to the utility model discloses a fuel cell's single chip battery system of patrolling and examining that above-mentioned any one embodiment provided, wherein fuel cell's single chip battery system of patrolling and examining still includes AD conversion module and digital isolator, and the output and the AD conversion module of signal processing subassembly are connected, and AD conversion module is connected with digital isolator, digital isolator and little the control unit's SPI communication interface connection.
According to the utility model discloses a fuel cell's monolithic battery system of patrolling and examining that above-mentioned any one embodiment provided, wherein the signal processing subassembly still includes second order filter circuit, input voltage clamp circuit and output voltage clamp circuit, and second order filter circuit and input voltage clamp circuit all set up the input at the signal processing subassembly, and second order filter circuit and input voltage clamp circuit are connected respectively between first input and second input, and first input and second input are successively connected with the input of subassembly with fortune after second order filter circuit and the input voltage clamp circuit are connected, and the output of signal processing subassembly passes through output voltage clamp circuit ground connection.
According to the single-chip battery inspection system of the fuel cell provided by any one of the above embodiments of the present invention, wherein the operational amplifier assembly comprises a first operational amplifier U1A, a second operational amplifier U1B, a first output filter circuit and a second output filter circuit, the first input terminal and the second input terminal of the signal processing assembly are respectively connected to the reverse input terminal and the same-direction input terminal of the operational amplifier U1A through a resistor Ra and a resistor Rc after passing through the second-order filter circuit and the input voltage clamping circuit, the reverse input terminal and the same-direction input terminal of the first operational amplifier U1A are respectively connected to the reference voltage source through resistors Re and Rd, the output terminal of the first operational amplifier U1A is connected to the same-direction input terminal of the second operational amplifier U1B through the first output filter circuit, the output terminal of the first operational amplifier U1A is further connected to the reverse input terminal of the first operational amplifier U1A through a resistor Rb, the output end of the second operational amplifier U1B is connected to the a/D conversion module through a second output filter circuit, and the output end of the second operational amplifier U1B is also connected to the inverting input end of the first operational amplifier U1B through a resistor Rb'.
According to the utility model discloses a fuel cell's monolithic battery system of patrolling and examining that above-mentioned any one embodiment provided, wherein first output filter circuit and second output filter circuit include resistance and electric capacity respectively, first output filter circuit's resistance is established ties between first operational amplifier U1A's output and second operational amplifier U1B's noninverting input end, first output filter circuit's resistance is close to second operational amplifier U1B's one end and is passed through first output filter circuit's electric capacity ground connection, second output filter circuit's resistance is established ties between second operational amplifier U1B's output and output voltage clamp circuit, second output filter circuit's resistance is close to output voltage clamp circuit's one end and is passed through first output filter circuit's electric capacity ground connection.
According to the utility model discloses a single chip battery system of patrolling and examining of fuel cell is provided to any one of the above-mentioned embodiments, wherein first operational amplifier U1A and second operational amplifier U1B are respectively through the power supply of outside isolation power.
According to the utility model discloses an above-mentioned arbitrary one embodiment provides fuel cell's monolithic battery system of patrolling and examining, wherein second order filter circuit includes two sets of filter sub-circuit, and every filter sub-circuit of group all includes resistance and two electric capacity, and the both ends of filter sub-circuit's resistance are connected with first input and second input respectively, and the both ends of filter sub-circuit's resistance still are respectively through a filter sub-circuit's electric capacity ground connection.
According to the utility model discloses a fuel cell's monolithic battery system of patrolling and examining is provided to above-mentioned any one embodiment, wherein the emitting diode input of opto-coupler relay is connected to external power source through current-limiting resistor.
According to the utility model discloses a fuel cell's single chip battery system of patrolling and examining that above-mentioned any one embodiment provided, wherein fuel cell's single chip battery system of patrolling and examining still includes CAN transceiver unit, microcontroller unit's CAN port passes through CAN transceiver unit and CAN bus connection.
According to the utility model discloses a fuel cell's single chip battery system of patrolling and examining that above-mentioned an arbitrary embodiment provided, wherein a plurality of fuel cell's single chip battery system of patrolling and examining detects the fuel cell that single chip battery piece number is greater than n through CAN bus communication cooperation synchronous working.
The single-cell inspection system for the fuel cell has the advantages that: the reference voltage of the operational amplifier is improved by using the precision reference voltage, so that the acquisition of the positive and negative voltages of a single chip in a single power supply mode is realized, and an optical coupling gating circuit and a signal acquisition circuit are simplified; the expandability is strong, and the number of pieces collected by a single piece can be increased only by adding an optical coupler and a decoder according to the requirement; the signal acquisition circuits are powered by an isolation power supply and directly measure the voltage at two ends of the single fuel cell so as to avoid potential accumulation; the A/D conversion module and the micro control unit are isolated to isolate the single chip circuit and the acquisition circuit, so that the interference of the electric environment of the fuel cell to the single chip circuit is prevented, and the electromagnetic compatibility is improved.
Drawings
The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are only intended to illustrate the technical solution of the present invention and are not intended to limit the scope of the present invention. In the figure:
fig. 1 shows a schematic view of a fuel cell system according to an embodiment of the present invention;
fig. 2 shows a schematic diagram of a signal processing assembly of the single-cell inspection system for a fuel cell according to an embodiment of the present invention as shown in fig. 1;
fig. 3 is a schematic structural diagram illustrating an optocoupler gating assembly of the single-cell inspection system for a fuel cell according to an embodiment of the present invention, as shown in fig. 1;
fig. 4 is a schematic structural diagram illustrating a micro control unit, an a/D conversion module, and a digital isolator of the single-chip battery inspection system for a fuel cell according to an embodiment of the present invention as shown in fig. 1;
fig. 5 is a schematic diagram illustrating a single cell inspection system for a plurality of fuel cells according to an embodiment of the present invention shown in fig. 1, which is connected to detect fuel cells synchronously through a CAN bus.
Detailed Description
Fig. 1-5 and the following description depict alternative embodiments of the invention to teach those skilled in the art how to make and reproduce the invention. For the purpose of teaching the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate that variations or substitutions from these embodiments will fall within the scope of the invention. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the invention. Accordingly, the present invention is not limited to the following alternative embodiments, but is only limited by the claims and their equivalents.
Fig. 1 to 4 show schematic views of a fuel cell system according to an embodiment of the present invention. As shown in fig. 1-4, the single-chip battery inspection system for the fuel cell comprises an optical coupling gating component 2, a signal processing component 3, a decoder component 5 and a micro-control unit 4, wherein the signal processing component 3 comprises an operational amplifier component (not shown) and a reference voltage source 31, the optical coupling gating component 2 comprises n optical coupling relays 21 which are sequentially numbered as 01 … n, the monolithic battery of external fuel cell 1 that fuel cell's monolithic battery system of patrolling and examining can detect is less one than its optical coupling relay 21's quantity, as shown in fig. 1-4, when optical coupling gating subassembly 2 includes 16 optical coupling relays 21, fuel cell's monolithic battery system of patrolling and examining can detect 15 single-chip batteries, external fuel cell 1 is established ties by 15 single-chip batteries and is constituteed and serial number in proper order for U0 to U14 No. and input (I) of every optical coupling relay 210、I1…I15) Sequentially connected with the negative electrode and the positive electrode of 15 single-chip batteries, wherein I0To the negative pole of U0, I1Negative connection … I to U114To the negative pole of U14, I15The output end (O) of the optocoupler relay 21 which is connected with the anode of U14 and is numbered in odd number1、O3…O15) Through a current limiting resistor (R)1’、R3’…R15’) An output terminal (O) of an even-numbered optocoupler relay 21 connected to a first input terminal of the signal processing assembly 30、O2…O14) Through a current limiting resistor (R)0’、R2’…R14’) A second input terminal connected to the signal processing component 3, the first and second input terminals of the signal processing component 3 being connected to a reference voltage source 31, respectively, the voltage Uref of the reference voltage source 31>| Uin 2-Uin 1|, where Uin1 is the voltage of the first input terminal, Uin2 is the voltage of the second input terminal, the output terminal of the signal processing module 3 is connected with the SPI communication interface of the micro control unit 4, and the control port of the micro control unit 4 is connected with the control terminal (C) of each optocoupler relay 21 through the decoder module 5 (C)0、C1…C15) And (4) connecting. The optical coupling gating component 2 is used for gating electric potentials at two ends of a single fuel cell, so that direct measurement of voltage of the single cell is achieved, the micro control unit 4 sequentially switches on and off two adjacent optical coupling relays 21 to ensure that only one single cell is on line at any moment, and the voltage of the single cell is differentially sent to the signal processing component 3.
According to the single cell inspection system for the fuel cell provided by any one of the above embodiments of the present invention, wherein the micro control unit 4 is sequentially connected with the optical coupling relays 21 at two ends of each single cell of the fuel cell through the decoder assembly 5, the anode and cathode of the single cell are respectively connected with the first input end and the second input end of the signal processing assembly 3 through the optical coupling relays 21, the signal processing assembly 3 is used for calculating the difference value of the input voltages of the first input end and the second input end of the signal processing assembly 3, the result calculated by the signal processing assembly 3 is amplified by the reference voltage source 31 to be the output voltage Uo' ═ Uref + (Uin 2-Uin 1) because Uref > | Uin 2-Uin 1|, therefore, the output voltage Uo ' of the signal processing module 3 can be kept at a positive value, and the micro control unit 4 calculates the actual voltage Uout between the positive and negative electrodes of each single battery as | Uo ' -Uref | according to the output voltage Uo ' and the voltage Uref of the reference voltage source 31.
According to the utility model discloses a fuel cell's monolithic battery system of patrolling and examining is provided to above-mentioned any one embodiment, wherein decoder subassembly 5 includes one or more decoder 51, and decoder 51's control end is connected with the IO port of little the control unit 4 respectively, and every output port D0, D1 … D15 of decoder 51 respectively with the control end (C) of an opto-coupler relay 210、C1…C15) And (4) connecting.
According to the present invention, there is provided a single cell inspection system for a fuel cell, wherein the voltage value Uref of the reference voltage source 31 is determined according to the fuel cell parameters and the structure of the fuel system, for example, the voltage Uref of the reference voltage source 31 is set to 2.048v in one embodiment.
According to the utility model discloses a fuel cell's single chip battery system of patrolling and examining that above-mentioned any one embodiment provided, wherein fuel cell's single chip battery system of patrolling and examining still includes AD conversion module 6 and digital isolator 7, and the output and the AD conversion module 6 of signal processing subassembly 3 are connected, and AD conversion module 6 is connected with digital isolator 7, digital isolator 7 and little the control unit 4 SPI communication interface connection. The A/D conversion module 6 is used for converting the voltage signal from the signal processing component 3 into a corresponding digital signal; the digital isolator 7 serves to isolate the micro control unit 4 from the signal processing assembly 3 to prevent interference of the micro control unit 4 by the fuel cell's electrical environment.
According to the utility model discloses a fuel cell's monolithic battery system of patrolling and examining that above-mentioned any one embodiment provided, wherein signal processing subassembly 3 still includes second order filter circuit 32, input voltage clamp circuit 33 and output voltage clamp circuit 34, second order filter circuit 32 and input voltage clamp circuit 33 all set up the input at signal processing subassembly 3, second order filter circuit 32 and input voltage clamp circuit 33 are connected respectively between first input and second input, first input and second input are successively connected the back with second order filter circuit 32 and input voltage clamp circuit 33 and are connected with the input of fortune subassembly, the output of signal processing subassembly 3 passes through output voltage clamp circuit 34 ground connection. The input voltage clamp 33 and the output voltage clamp 34 are used to prevent the differential mode signal from damaging the back-end components too much.
The single-chip battery inspection system for fuel cells provided by any one of the above embodiments of the present invention, wherein the operational amplifier module comprises a first operational amplifier U1A, a second operational amplifier U1B, a first output filter circuit 35 and a second output filter circuit 36, the first input terminal and the second input terminal of the signal processing module 3 are respectively connected to the reverse input terminal and the same-direction input terminal of the operational amplifier U1A through a resistor Ra and a resistor Rc after passing through the second-order filter circuit 32 and the input voltage clamp circuit 33, the reverse input terminal and the same-direction input terminal of the first operational amplifier U1A are respectively connected to the reference voltage source 31 through resistors Re and Rd, the output terminal of the first operational amplifier U1A is connected to the same-direction input terminal of the second operational amplifier U1B through the first output filter circuit 35, the output terminal of the first operational amplifier U1A is further connected to the reverse input terminal of the first operational amplifier U1A through a resistor Rb, the output terminal of the second operational amplifier U1B is connected to the a/D conversion module 6 through the second output filter circuit 36, and the output terminal of the second operational amplifier U1B is also connected to the inverting input terminal of the first operational amplifier U1B through the resistor Rb'.
According to the single-chip cell inspection system for the fuel cell provided by any one of the above embodiments of the present invention, when even single-chip cells of the fuel cell, such as 0 th and 2 … th cells, are accessed, Uin 2-Uin 1 is a negative voltage; when odd single cells of the fuel cell are accessed, such as the 1 st and the 3 rd 3 … cells, the Uin 2-Uin 1 are positive voltages; the first operational amplifier U1A is used to calculate the difference between the input voltages of the first input terminal and the second input terminal, and the result calculated by U1A is Uo ═ Uref + (Uin 2-Uin 1) after being amplified by the reference voltage source 31, because Uref > | Uin 2-Uin 1|, the output voltage Uo of U1A is a positive value; the second operational amplifier U1B is used for voltage stabilization, the output voltage Uo of U1A is stabilized by the second operational amplifier U1B to obtain Uo ', and the micro control unit 4 calculates the actual voltage Uout ═ Uo ' -Uref | according to the output voltage Uo ' and the voltage Uref of the reference voltage source 31.
According to the utility model discloses a single chip battery system of patrolling and examining of fuel cell that any one of the above-mentioned embodiments provided, wherein first output filter circuit 35 and second output filter circuit 36 include resistance R3, R4 and electric capacity C3, C4 respectively, resistance R3 of first output filter circuit 35 establishes ties between the output of first operational amplifier U1A and the noninverting input of second operational amplifier U1B, the one end that resistance R3 of first output filter circuit 35 is close to second operational amplifier U1B is through electric capacity C3 ground connection of first output filter circuit 35, resistance R4 of second output filter circuit 36 establishes ties between the output of second operational amplifier U1B and output voltage clamp circuit 34, the one end that resistance R4 of second output filter circuit 36 is close to output voltage clamp circuit 34 is through electric capacity C4 ground connection of first output filter circuit 35.
According to the utility model discloses a single chip battery system of patrolling and examining of fuel cell is provided to any one of the above-mentioned embodiments, wherein first operational amplifier U1A and second operational amplifier U1B are respectively through the power supply of outside isolation power.
According to the utility model discloses a fuel cell's monolithic battery system of patrolling and examining that above-mentioned any one embodiment provided, wherein second order filter circuit 32 includes two sets of filtering sub-circuit, and every group filtering sub-circuit all includes resistance R1, R2 and two electric capacity C1, C2, C1', C2 ', and the both ends of filtering sub-circuit's resistance R1, R2 are connected with first input and second input respectively, and the electric capacity ground connection through a filtering sub-circuit is still passed through respectively at filtering sub-circuit's resistance R1, R2's both ends.
According to the present invention, any one of the above embodiments provides a single cell inspection system for a fuel cell, wherein the light emitting diode input terminal (J) of the optocoupler relay 210、J1…J15) Connected to an external power supply through a current limiting resistor R5.
According to the utility model discloses a fuel cell's single chip battery system of patrolling and examining that above-mentioned any one embodiment provided, wherein fuel cell's single chip battery system of patrolling and examining still includes CAN transceiver unit 8, little the controller unit 4's CAN port passes through CAN transceiver unit 8 and is connected with CAN bus 9. The micro control unit 4 transmits the actual voltage Uout to the controller of the fuel cell system and other devices via the CAN transceiver unit 8 and the CAN bus 9.
Fig. 5 is a schematic diagram illustrating a single cell inspection system for a plurality of fuel cells according to an embodiment of the present invention shown in fig. 1, which is connected to a synchronous detection fuel cell through a CAN bus 9. As shown in fig. 5, when the number of the individual cells of the external fuel cell 1 is greater than n, that is, the number of the individual cells of the external fuel cell is greater than the number of the individual cells that CAN be detected by the individual cell inspection system a of one fuel cell, the fuel cell CAN be simultaneously connected to the individual cell inspection systems a of a plurality of fuel cells, and the individual cells of the external fuel cell 1 are detected by the individual cell inspection systems a of a plurality of fuel cells in cooperation with the communication of the CAN bus 9.
According to the present invention, when the inspection system a of a plurality of fuel cells is operated in a coordinated manner, the inspection system of a single cell of each fuel cell can be set as a master controller or a slave controller by configuring the external configuration interface of the micro control unit, so as to determine the coordination relationship of the inspection system of a plurality of fuel cells in the inspection process, for example, when the inspection system of a single cell of a plurality of fuel cells is configured by using the external configuration interfaces (I/Osp1, I/Osp2, I/Osp3) of 3 micro control units, the controller configuration truth table of table 1 below shows a configuration manner of the inspection system of a single cell of a plurality of fuel cells.
TABLE 1
According to the single-chip battery inspection system of the fuel battery provided by any one of the above embodiments of the present invention, the master controller collects the information from each slave controller via the CAN bus 9, and transmits the collected voltage information of the external fuel battery 1 to the CAN bus 9 for information interaction with the fuel battery controller and other devices,
the single-cell inspection system for the fuel cell has the advantages that: the reference voltage of the operational amplifier is improved by using the precision reference voltage, so that the acquisition of the positive and negative voltages of a single chip in a single power supply mode is realized, and an optical coupling gating circuit and a signal acquisition circuit are simplified; the expandability is strong, and the number of pieces collected by a single piece can be increased only by adding an optical coupler and a decoder according to the requirement; the signal acquisition circuits are powered by an isolation power supply and directly measure the voltage at two ends of the single fuel cell so as to avoid potential accumulation; the A/D conversion module and the micro control unit are isolated to isolate the single chip circuit and the acquisition circuit, so that the interference of the electric environment of the fuel cell to the single chip circuit is prevented, and the electromagnetic compatibility is improved.
It will of course be appreciated that whilst the foregoing has been given by way of example of the present invention, such and other modifications and variations thereto as would be apparent to persons skilled in the art are deemed to fall within the broad scope of the invention as herein set forth. Therefore, while the invention has been described with reference to a preferred embodiment, it is not intended that the novel features be limited thereby, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the broad scope of the disclosure and claims.
Claims (10)
1. The utility model provides a single chip battery system of patrolling and examining of fuel cell, the external fuel cell that single chip battery system of patrolling and examining of fuel cell detected comprises the series connection of multi-disc single chip battery, a serial communication port, the single chip battery system of patrolling and examining of fuel cell includes opto-coupler gating subassembly, signal processing subassembly, decoder subassembly and little the control unit, the signal processing subassembly includes fortune and puts subassembly and reference voltage source, opto-coupler gating subassembly includes n +1 opto-coupler relay and serial number is 0, 1 … n in proper order, the input of n +1 opto-coupler relay is connected with the negative pole and the positive pole of n single chip battery of external fuel cell in proper order, the output of the opto-coupler relay who serial number is the odd number is connected to the first input of signal processing subassembly through current-limiting resistance, the output of the opto-coupler relay who serial number is the even, the first input end and the second input end are respectively connected with a reference voltage source, the voltage Uref > | Uin 2-Uin 1| of the reference voltage source is provided, wherein Uin1 is the voltage of the first input end, Uin2 is the voltage of the second input end, the output end of the signal processing assembly is connected with an SPI (serial peripheral interface) communication interface of the micro control unit, and a control port of the micro control unit is respectively connected with the control end of each optocoupler relay through a decoder assembly.
2. The single cell inspection system according to claim 1, wherein the single cell inspection system further includes an a/D conversion module and a digital isolator, wherein an output terminal of the signal processing module is connected to the a/D conversion module, the a/D conversion module is connected to the digital isolator, and the digital isolator is connected to the SPI communication interface of the micro control unit.
3. The single cell inspection system according to claim 2, wherein the signal processing assembly further includes a second-order filter circuit, an input voltage clamp circuit, and an output voltage clamp circuit, the second-order filter circuit and the input voltage clamp circuit are both disposed at an input end of the signal processing assembly, the second-order filter circuit and the input voltage clamp circuit are respectively connected between the first input end and the second input end, the first input end and the second input end are connected to the second-order filter circuit and the input voltage clamp circuit in sequence and then connected to an input end of the operational amplifier assembly, and an output end of the signal processing assembly is grounded through the output voltage clamp circuit.
4. The single-chip battery inspection system according to claim 3, wherein the operational amplifier module comprises a first operational amplifier U1A, a second operational amplifier U1B, a first output filter circuit and a second output filter circuit, the first input terminal and the second input terminal of the signal processing module are respectively connected to the inverting input terminal and the inverting input terminal of the operational amplifier U1A through a resistor Ra and a resistor Rc after passing through a second-order filter circuit and an input voltage clamping circuit, the inverting input terminal and the inverting input terminal of the first operational amplifier U1A are respectively connected to a reference voltage source through resistors Re and Rd, the output terminal of the first operational amplifier U1A is connected to the inverting input terminal of the second operational amplifier U1B through a first output filter circuit, the output terminal of the first operational amplifier U1A is further connected to the inverting input terminal of the first operational amplifier U1A through a resistor Rb, the output terminal of the second operational amplifier U1B is connected to the A/D conversion module through a second output filter circuit, the output of the second operational amplifier U1B is also connected to the inverting input of the first operational amplifier U1B through a resistor Rb'.
5. The single cell routing inspection system for fuel cells according to claim 4, wherein the first output filter circuit and the second output filter circuit respectively include a resistor and a capacitor, the resistor of the first output filter circuit is connected in series between the output terminal of the first operational amplifier U1A and the non-inverting input terminal of the second operational amplifier U1B, one end of the resistor of the first output filter circuit, which is close to the second operational amplifier U1B, is grounded through the capacitor of the first output filter circuit, the resistor of the second output filter circuit is connected in series between the output terminal of the second operational amplifier U1B and the output voltage clamp circuit, and one end of the resistor of the second output filter circuit, which is close to the output voltage clamp circuit, is grounded through the capacitor of the first output filter circuit.
6. The single cell routing inspection system for fuel cells according to claim 4, wherein the first operational amplifier U1A and the second operational amplifier U1B are each powered by an external isolated power source.
7. The single-cell inspection system according to claim 4, wherein the second-order filter circuit includes two sets of filter sub-circuits, each set of filter sub-circuit includes a resistor and two capacitors, two ends of the resistor of the filter sub-circuit are respectively connected to the first input terminal and the second input terminal, and two ends of the resistor of the filter sub-circuit are respectively grounded through one capacitor of the filter sub-circuit.
8. The single cell inspection system according to claim 2, wherein an input terminal of the light emitting diode of the optocoupler relay is connected to an external power source through a current limiting resistor.
9. The single cell inspection system according to claim 1, further comprising a CAN transceiver unit, wherein a CAN port of the micro control unit is connected to a CAN bus via the CAN transceiver unit.
10. The single cell inspection system for fuel cells according to claim 9, wherein the single cell inspection systems for a plurality of fuel cells detect external fuel cells having a number of single cells greater than n by a CAN bus communication in cooperation with a synchronous operation.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328121A (en) * | 2021-06-25 | 2021-08-31 | 惠州绿保科技有限公司 | Voltage inspection device for fuel cell |
| CN113793957A (en) * | 2021-09-15 | 2021-12-14 | 上海空间电源研究所 | A Positive and Negative Voltage Sampling System for Fuel Cells |
| CN113866679A (en) * | 2021-10-28 | 2021-12-31 | 北京亿华通科技股份有限公司 | Broken line detection device and system of fuel cell system |
| CN114355195A (en) * | 2021-12-09 | 2022-04-15 | 卓品智能科技无锡有限公司 | Fuel cell voltage inspection system |
| CN116072933A (en) * | 2023-03-02 | 2023-05-05 | 武汉海亿新能源科技有限公司 | Multi-channel rapid inspection topological connection structure of fuel cell and control method |
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2020
- 2020-06-04 CN CN202021003385.4U patent/CN212517270U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328121A (en) * | 2021-06-25 | 2021-08-31 | 惠州绿保科技有限公司 | Voltage inspection device for fuel cell |
| CN113793957A (en) * | 2021-09-15 | 2021-12-14 | 上海空间电源研究所 | A Positive and Negative Voltage Sampling System for Fuel Cells |
| CN113866679A (en) * | 2021-10-28 | 2021-12-31 | 北京亿华通科技股份有限公司 | Broken line detection device and system of fuel cell system |
| CN114355195A (en) * | 2021-12-09 | 2022-04-15 | 卓品智能科技无锡有限公司 | Fuel cell voltage inspection system |
| CN116072933A (en) * | 2023-03-02 | 2023-05-05 | 武汉海亿新能源科技有限公司 | Multi-channel rapid inspection topological connection structure of fuel cell and control method |
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