CN100590914C - Fuel battery voltage itinerant monitoring system - Google Patents
Fuel battery voltage itinerant monitoring system Download PDFInfo
- Publication number
- CN100590914C CN100590914C CN200610034287A CN200610034287A CN100590914C CN 100590914 C CN100590914 C CN 100590914C CN 200610034287 A CN200610034287 A CN 200610034287A CN 200610034287 A CN200610034287 A CN 200610034287A CN 100590914 C CN100590914 C CN 100590914C
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- Prior art keywords
- switching network
- regulation resistance
- fuel battery
- monitoring system
- digital regulation
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- 239000000446 fuel Substances 0.000 title claims abstract description 46
- 238000012544 monitoring process Methods 0.000 title claims description 29
- 238000000034 method Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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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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- Fuel Cell (AREA)
Abstract
The invention discloses a fuel cell voltage tour supervisory system, includes a group fuel cell which is composed by certain cells, switching network unit, the data acquisition unit and the host control unit, among, each fuel cell positive electrode connects to the input end of switching network unit, the out-port of switching network unit connects to a digital potentiometer, the host control unit connects control end of the switching network unit and provides the network switch control signal, the digital potentiometer transmits the switching network unit outputed voltage through the data acquisition unit into the host control unit, the host control unit connects to the digital potentiometer and provides control signal to the digital potentiometer. The invention merit is the switch structure simple, tour monitor speed quick, and the cost low.
Description
[technical field]
The present invention relates to fuel cell, particularly a kind of itinerant monitor system system of fuel cell single battery voltage.
[background technology]
The effective operating voltage of monolithic battery of PEM fuel cell (Proton Exchange Membrane Fuel Cells) is 0.4-0.8V only, needs the practical application of multi-disc series connection ability.During the work of multi-disc tandem PEM fuel cell pile, the bad battery of monolithic all will constitute influence to whole stack, need each sheet battery is carried out itinerant monitor system, so that bad monocell is in time handled, guarantee the pile operational excellence, therefore the appearance of fuel battery voltage itinerant monitoring system is arranged.
Usually PEM fuel cell itinerant monitor system system is made of main control unit, data acquisition unit and switching network unit at present, give an order by main control unit, the control switch network makes corresponding fuel-cell single-cell terminal voltage be connected to data acquisition unit, obtains its real-time magnitude of voltage.But because the application mode of fuel cell multi-disc series connection, in the high-power applications system, fuel battery has very high accumulative total electromotive force, and the monolithic battery two ends also have very high common-mode voltage, and therefore withstand voltage the and common-mode voltage to monitoring system suppresses all to have very high requirement.
Shown in figure one, a kind of existing fuel battery voltage itinerant monitoring system, the two ends of fuel battery 11 every monocells connect the in-phase input end and the inverting input of differential amplifier 14 respectively, obtain single battery voltage, then through multiplexer or other forms of switching network 15, by MCU (microcontroller) 17 and A/D converter (analog/digital converter) 16 controls, realize that the voltage itinerant of monolithic battery monitors.This scheme is very high to the common-mode rejection ratio requirement of differential amplifier, and the differential amplifier One's name is legion, makes it with high costs.
Shown in figure two, another kind of existing fuel battery voltage itinerant monitoring system, fuel battery 21 each monocell are endowed numbering, be divided into odd-numbered and even-numbered, the anodal switch that connects of every joint monocell, be respectively odd-numbered switch 25 and even-numbered switch 26, all odd-numbered switches link to each other, all even-numbered switches link to each other, by the action of MCU29 control switch, when making each the monitoring, make adjacent odd-numbered switch and even-numbered switch closure, by a high cmrr differential amplifier 27 and A/D converter 28, realize the measurement of a joint single battery voltage again.It is once anti-phase that the defective of this scheme is that the every monitoring of A/D converter input voltage once just needs, and therefore will use ambipolar A/D converter, the also corresponding complexity of monitoring facilities; Same switch motion also becomes complicated, makes the touring speed that detects descend.
[summary of the invention]
Technical problem to be solved by this invention provides a kind of high accumulation electromotive force fuel cell, switching network fuel battery voltage itinerant monitoring system that speed is fast, cost is low simple in structure, touring of can be applicable to.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of fuel battery voltage itinerant monitoring system, comprise one group of fuel cell of forming by some monocells, the switching network unit, data acquisition unit and main control unit, it is characterized in that: the positive pole of each monocell of fuel cell is connected to the input of switching network unit, the output of switching network unit is connected to a digital regulation resistance, main control unit connects the control end of switching network unit and the control signal of network switching is provided, digital regulation resistance is transferred to main control unit with the voltage of switching network unit output by data acquisition unit, main control unit is connected to digital regulation resistance and the control signal of digital regulation resistance is provided, described data acquisition unit comprises a differential amplifier and digital to analog converter, the adjustable end of digital regulation resistance is connected to the in-phase input end of differential amplifier, the reverse inter-input-ing ending grounding of differential amplifier, the output of differential amplifier is connected to main control unit by digital to analog converter.
Further improvement of the present invention is that described switching network unit is the two-way photo-coupled relay, and main control unit is connected to a decoder by control bus, and controls the gating of two-way photo-coupled relay by decoder.
Another improvement of the present invention is that described switching network unit is multiplexer or variable connector, and main control unit connects multiplexer or variable connector and gating signal is provided by control bus.
The invention has the beneficial effects as follows that owing to adopt the method for digital regulation resistance dividing potential drop make full use of the calculation process ability of MCU, there is not the influence of high common-mode voltage in the voltage monitoring process, and construction of switch is simple, makes that itinerant monitor system speed is fast.Whole system is used a differential amplifier, an A/D converter, a MCU, and switching network is identical, has only increased a dividing potential drop digital regulation resistance, makes cost significantly reduce, and has very high practical value.
Feature of the present invention and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
[description of drawings]
Fig. 1 is a kind of system construction drawing of existing fuel battery voltage itinerant monitoring system.
Fig. 2 is the system construction drawing of another kind of existing fuel battery voltage itinerant monitoring system.
Fig. 3 is the system configuration schematic diagram of fuel battery voltage itinerant monitoring system of the present invention.
Fig. 4 is the schematic diagram of first specific embodiment of fuel battery voltage itinerant monitoring system of the present invention.
Fig. 5 is the schematic diagram of second specific embodiment of fuel battery voltage itinerant monitoring system of the present invention.
[embodiment]
Embodiment one:
Present embodiment as shown in Figure 4, fuel battery 41 every joint monocell 42 positive poles are drawn terminals, are connected to switching network.Switch element 43 is selected AQW210 two-way photo-coupled relay for use, and withstand voltage reaches 350V, fast motion speed 300us.Every road photo-coupled relay has switch input, switch output and switch control pin.The every batteries correspondence of fuel battery is connected to the input of one tunnel optical coupling switch, and each optical coupling output switching terminal is connected to a bit, is the switching network output.Every road optical coupling switch control end is connected respectively to decoder 44, comes the control switch state by MCU49 control decoder.The switching network output is series-connected to divider resistance 45 and digital regulation resistance 46.The divider resistance resistance guarantees that by the highest accumulation electromotive force decision of fuel battery digital regulation resistance is operated under the reliable voltage.Digital regulation resistance is chosen the MAX5438 of operating voltage 30V, 128 taps, 100K Europe resistance, and its voltage ratio can be controlled by MCU by the SPI universal serial bus.The adjustable end of digital regulation resistance and the in-phase input end and the inverting input that systematically are connected differential amplifier 47 respectively, the output of differential amplifier 47 is transferred to MCU 49 through A/D converter 48 with detected magnitude of voltage.According to the requirement of system accuracy, A/D converter can be selected 12 or 16 for use.
Each monitoring, MCU is by program setting, control a way switch closure, and according to the position of the switch or numbering, set the digital regulation resistance voltage ratio, voltage ratio can be stored among the MCU in advance corresponding to the position of the switch or numbering, and the input voltage range that the adjustable terminal voltage of assurance digital regulation resistance is no more than differential amplifier gets final product.After obtaining the adjustable terminal voltage value of digital regulation resistance.Disconnect this way switch, MCU controls next way switch closure, and set the digital regulation resistance voltage ratio, and obtain next with identical method and save the voltage of monocell system reference ground, deduct the magnitude of voltage that this voltage can obtain this monocell of monitoring with the magnitude of voltage of earlier stored.
Wherein, the magnitude of voltage of the voltage ratio of digital regulation resistance and the adjustable end of detection digital regulation resistance is obtained by following algorithm: each closed switch element, suppose and this time be Km, record the adjustable terminal voltage value of digital regulation resistance, be made as Vtm, if this moment, voltage ratio was Pm, the voltage ratio on the digital regulation resistance is P, is fixed value.Then by the computing of MCU, m joint monocell or m regional fuel battery are Vt to reference ground voltage value
m/ (P
m* P), and store by MCU.Disconnect Km, closed Km+1 records the adjustable terminal voltage value of digital regulation resistance, is made as Vtm+1, and this moment, the digital regulation resistance voltage ratio was Pm+1, and by the computing of MCU, m+1 joint monocell or m+1 regional fuel battery are Vt to reference ground voltage value
M+1/ (P
M+1* P), and store by MCU.Then the magnitude of voltage Vm of m joint monocell or m regional fuel battery is: Vt
m/ (P
m* P)-Vt
M+1/ (P
M+1* P).
All switches of MCU program control can be realized the voltage monitoring of all monocells of fuel battery for one time according to the numbering action.
Embodiment two:
Present embodiment is shown in figure five, and this embodiment is applicable to monocell negligible amounts, the lower situation of accumulation electromotive force of fuel battery 51, and switching network can be selected multiplexer 53 for use, and as CD4067,16 select 1 multiplexer, can be operated under the 20V voltage.Every joint monocell 52 positive poles are connected to the multiplexer input, and on off state is selected by MCU 57 address buss.The multiplexer output is connected to digital regulation resistance 54, and MCU obtains the adjustable terminal voltage of digital regulation resistance through differential amplifier 55 and A/D converter 56.
The monitoring method of present embodiment is described as embodiment one, and this embodiment has more simple circuit configuration.
Claims (8)
1. fuel battery voltage itinerant monitoring system, comprise one group of fuel cell of forming by some monocells, the switching network unit, data acquisition unit and main control unit, it is characterized in that: the positive pole of each monocell of fuel cell is connected to the input of switching network unit, the output of switching network unit is connected to a digital regulation resistance, main control unit connects the control end of switching network unit and the control signal of network switching is provided, digital regulation resistance is transferred to main control unit with the voltage of switching network unit output by data acquisition unit, main control unit is connected to digital regulation resistance and the control signal of digital regulation resistance is provided, described data acquisition unit comprises a differential amplifier and digital to analog converter, the adjustable end of digital regulation resistance is connected to the in-phase input end of differential amplifier, the reverse inter-input-ing ending grounding of differential amplifier, the output of differential amplifier is connected to main control unit by digital to analog converter.
2. fuel battery voltage itinerant monitoring system as claimed in claim 1 is characterized in that: also be connected with a divider resistance between the output of described switching network unit and digital regulation resistance.
3. as the described fuel battery voltage itinerant monitoring system in one of claim 1 or 2, it is characterized in that: described switching network unit is the two-way photo-coupled relay.
4. fuel battery voltage itinerant monitoring system as claimed in claim 3 is characterized in that: described main control unit is connected to a decoder by control bus, and controls the gating of two-way photo-coupled relay by decoder.
5. fuel battery voltage itinerant monitoring system as claimed in claim 3 is characterized in that: described main control unit is connected to digital regulation resistance and sets the digital regulation resistance voltage ratio by control bus.
6. fuel battery voltage itinerant monitoring system as claimed in claim 2 is characterized in that: described switching network unit is multiplexer or variable connector.
7. fuel battery voltage itinerant monitoring system as claimed in claim 6 is characterized in that: described main control unit connects multiplexer or variable connector and gating signal is provided by control bus.
8. fuel battery voltage itinerant monitoring system as claimed in claim 6 is characterized in that: described main control unit is connected to digital regulation resistance and sets the digital regulation resistance voltage ratio by control bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610034287A CN100590914C (en) | 2006-03-09 | 2006-03-09 | Fuel battery voltage itinerant monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610034287A CN100590914C (en) | 2006-03-09 | 2006-03-09 | Fuel battery voltage itinerant monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101034745A CN101034745A (en) | 2007-09-12 |
| CN100590914C true CN100590914C (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610034287A Expired - Fee Related CN100590914C (en) | 2006-03-09 | 2006-03-09 | Fuel battery voltage itinerant monitoring system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865942B (en) * | 2010-04-07 | 2012-04-25 | 大连交通大学 | Voltage itinerant measurement circuit of low-power methanol fuel cell |
| US9099706B2 (en) * | 2011-06-28 | 2015-08-04 | GM Global Technology Operations LLC | Method of providing a calibrating reference voltage and index synchronization sequence for a cell voltage measurement system |
| US11703547B2 (en) * | 2018-04-03 | 2023-07-18 | Maxim Integrated Products, Inc. | Software-configurable battery management systems and methods |
| CN109581233B (en) * | 2018-12-29 | 2024-03-15 | 武汉理工大学 | Device for detecting positive and negative monolithic voltages of fuel cell and control method thereof |
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2006
- 2006-03-09 CN CN200610034287A patent/CN100590914C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101034745A (en) | 2007-09-12 |
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