CN2828836Y - Safety and correction voltage monitoring device for fuel cell - Google Patents
Safety and correction voltage monitoring device for fuel cell Download PDFInfo
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- CN2828836Y CN2828836Y CNU2005200405220U CN200520040522U CN2828836Y CN 2828836 Y CN2828836 Y CN 2828836Y CN U2005200405220 U CNU2005200405220 U CN U2005200405220U CN 200520040522 U CN200520040522 U CN 200520040522U CN 2828836 Y CN2828836 Y CN 2828836Y
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Abstract
The utility model relates to a safe accurate voltage monitoring device for fuel cells, which comprises a single cell voltage detector and a fuel cell controller, wherein the single cell voltage detector comprises a plurality of differential amplifiers, a plurality of multiway switches and a monolithic computer provided with communication interfaces of a controller area bus (a CAN bus), wherein the monolithic computer comprises an A/ D converter and a CPU; the differential amplifiers are connected with single cells which are in need of monitoring in a one-to-one correspondence mode so as to monitor the voltage difference between two single electrodes of fuel cell electric piles; the multiway switches are alternately switched to switch off or switch on under the control of the CPU; output voltage signals of the differential amplifiers, which are acquired when the multiway switches are switched on are changed into digital signals by the A/ D converter; the digital signals are acquired and analyzed by the CPU so as to obtain monitoring information to fuel cell voltage; the monitoring information is sent to the fuel cell controller by the monolithic computer through a CAN bus.
Description
Technical field
The utility model relates to fuel cell, relates in particular to a kind of fuel cell voltage monitoring apparatus of safety and precise.
Background technology
Electrochemical fuel cell is a kind of device that hydrogen and oxygenant can be changed into electric energy and reaction product.The internal core parts of this device are membrane electrode (Membrane Electrode Assembly are called for short MEA), and membrane electrode (MEA) is made up of as carbon paper a PEM, two porous conductive materials of film two sides folder.The catalyzer that contains the initiation electrochemical reaction of even tiny dispersion on two boundary surfaces of film and carbon paper is as the metal platinum catalyzer.The membrane electrode both sides can galvanochemistry will take place with conductive body to be sent out and answers the electronics that generates in the process, draws by external circuit, constitutes current return.
At the anode tap of membrane electrode, fuel can pass poriness diffusion material (carbon paper) by infiltration, and electrochemical reaction takes place on catalyst surface, lose electronics, form positive ion, positive ion can pass PEM by migration, arrives the other end cathode terminal of membrane electrode.At the cathode terminal of membrane electrode, contain the gas of oxygenant (as oxygen), as air, pass poriness diffusion material (carbon paper), and the generation electrochemical reaction obtains electronics on catalyst surface, forms negative ion by infiltration.The positive ion of coming in the negative ion and the anode tap migration of cathode terminal formation reacts, and forms reaction product.
Adopting hydrogen is fuel, and the air that contains oxygen is in the Proton Exchange Membrane Fuel Cells of oxygenant (or pure oxygen is an oxygenant), and fuel hydrogen has just produced hydrogen positive ion (or being proton) in the catalytic electrochemical reaction of anodic site.PEM helps the hydrogen positive ion to move to the cathodic area from the anodic site.In addition, PEM is separated the air-flow and the oxygen containing air-flow of hydrogen fuel, they can not mixed mutually and produces explosion type reaction.
In the cathodic area, oxygen obtains electronics on catalyst surface, forms negative ion, and moves the hydrogen positive ion reaction of coming, reaction of formation product water with the anodic site.In the Proton Exchange Membrane Fuel Cells that adopts hydrogen, air (oxygen), anode reaction and cathode reaction can be expressed in order to following equation:
Anode reaction:
Cathode reaction:
In typical Proton Exchange Membrane Fuel Cells, membrane electrode (MEA) generally all is placed in the middle of the pole plate of two conductions, and quarter is milled by die casting, punching press or machinery in the surface that every guide plate contacts with membrane electrode, and formation is the diversion trench of one or more at least.These guide plates can above metal material pole plate, also can be the pole plate of graphite material.Fluid duct on these guide plates and diversion trench import fuel and oxygenant the anodic site and the cathodic area on membrane electrode both sides respectively.In the structure of a Proton Exchange Membrane Fuel Cells monocell, only there is a membrane electrode, the membrane electrode both sides are respectively the fair water fin of anode fuel and the fair water fin of cathode oxidant.These fair water fins are both as current collector plate, and also as the mechanical support on membrane electrode both sides, the diversion trench on the fair water fin acts as a fuel again and enters the passage of anode, cathode surface with oxygenant, and as the passage of taking away the water that generates in the fuel cell operation process.
In order to increase the general power of whole Proton Exchange Membrane Fuel Cells, two or more monocells can be connected into electric battery or be unified into electric battery by the mode that tiles usually by straight folded mode.In straight folded, in-line electric battery, can there be diversion trench on the two sides of a pole plate, and wherein one side can be used as the anode guide face of a membrane electrode, and another side can be used as the cathode diversion face of another adjacent membranes electrode, and this pole plate is called bipolar plates.A series of monocell connects together by certain way and forms an electric battery.Electric battery tightens together by front end-plate, end plate and pull bar usually and becomes one.
A typical battery stack generally includes: the water conservancy diversion import and the flow-guiding channel of (1) fuel and oxidant gas are distributed to fuel (hydrogen-rich gas that obtains as hydrogen, methyl alcohol or methyl alcohol, rock gas, gasoline) and oxygenant (mainly being oxygen or air) in the diversion trench of each anode, cathode plane equably after reforming; (2) import and export and the flow-guiding channel of cooling fluid (as water) are evenly distributed to cooling fluid in each electric battery inner cooling channel, and the thermal absorption that hydrogen in the fuel cell, the themopositive reaction of oxygen galvanochemistry are generated is also taken electric battery out of and dispelled the heat; (3) outlet of fuel and oxidant gas and corresponding flow-guiding channel, fuel gas and oxidant gas are when discharging, and portability goes out the liquid that generates in the fuel cell, the water of steam state.Usually, the import and export of all fuel, oxygenant, cooling fluid are all opened on the end plate of fuel cell group or on two end plates.
Proton Exchange Membrane Fuel Cells both can be used as the power system of delivery vehicles such as car, ship, can be used as movable type or stationary power generation station again.
Proton Exchange Membrane Fuel Cells generally is made up of several monocells, these monocells are coupled together the formation pem fuel cell stack in the mode of serial or parallel connection, and pem fuel cell stack and other operation back-up systems are combined constitutes whole Proton Exchange Membrane Fuel Cells electricity generation system.
Because each pem fuel cell stack module is generally formed by several monocell serial or parallel connections, therefore to operation of fuel cells voltage, particularly control is particularly important automatically with security alarm in all monocell operating voltage monitoring.Because any abnormal conditions of whole fuel cell generation,, exceed normal working temperature etc. and all can show some monocell operating voltage and be in abnormality as excess current.Particularly when the electrode puncture occurring, the monocell output voltage at this electrode place can reach unusual numerical value, as approaches zero, even negative value occurs, and other normal monocell work output voltages are generally between 1.2～0.5V.Long-play can cause permanent damages and have unsafe factor at the electrode of negative value.So the monocell monitoring to each module of fuel cell pack is very important; when indivedual or some monocell operating voltage are lower than other monocell normal working voltages; the control subsystem of fuel cell generation should in time be reported to the police; even carry out and shut down; cut off load, cut off orders such as hydrogen supply.
Consult Fig. 1, Fig. 2.Fig. 1 is original fuel battery voltage single battery voltage detecting device electrical block diagram, comprises fuel cell pack 101, some optoelectronic switches 102, A/D converter 103 and CPU 104.Fig. 2 is original fuel cell voltage monitoring apparatus schematic diagram, comprises fuel cell pack 201, fuel battery voltage single battery voltage detecting device 202, fuel cell controller 203, CAN bus 204.
As shown in Figure 2, in traditional control method, after the fuel battery voltage monitor records monitoring point voltage, the measured value of each monitoring point is all sent to controller by the CAN bus.Because what be subjected to that CAN bus communication speed, each fuel cell need monitor becomes tens restrictions to factors such as hundreds of single electrode operation conditionss often, usually the method that adopts the intercycle to send sends each monitoring point magnitude of voltage to fuel cell controller, and whether controller obtains the fuel cell electrode performance to all data analyses normal.Usually there is the number of the fuel cell electrode of taking to increase the monitoring point monitoring to remedy the deficiency of communication speed.Above-mentioned way has the following disadvantages:
1. owing to sent all monitoring point voltage to controller, like this controller obtain each twice magnitude of voltage in front and back, monitoring point time phase difference often more than hundreds of millisecond to 1000 millisecond.Whether controller is can't the work of real-time judge fuel cell electrode normal.
2. lot of data is transmitted on the CAN bus, has reduced the reliability of communication.
3. controller need be handled a large amount of monitoring point voltage datas.
4. the number that increases the monitoring point can not remedy the deficiency of communication speed fully, can cause simultaneously when fuel cell electrode breaks down, because a monitoring point has been measured too many electrode and can't have been determined it specifically is which electrode breaks down.
The Shanghai supernatural power company voltage monitoring and the supervising device of extensive integral type fuel battery " a kind of be fit to " (application for a patent for invention number: 2004100175089; Utility model application number: 2004200216703).This patent utility model technical matters to be solved provides a kind of voltage monitoring and supervising device that is fit to extensive integral type fuel battery.The single battery voltage monitor that is adopted in this device comprises single-chip microcomputer, the some photoelectric switch with controller zone bus (CAN bus) communication interface, photoelectric switch is connected one by one with the monocell that needs monitoring, the conducting or the closure of the touring control of the output signal of single-chip microcomputer corresponding light electric switchgear, and will send to analyzer-controller by the CAN bus after the numerical value filtration treatment that collect.The principle schematic of its single battery voltage monitor as shown in Figure 2.
Though this patented technology can be monitored a monocell in the extensive integral type fuel battery or the output voltage of one group of monocell, but also there are some technological deficiencies, the principle of work of this technology is closed or is opened for the I/O mouth of the CPU by single-chip microcomputer switches pairing optoelectronic switch, need guarantee only to connect 2 tunnel adjacent optoelectronic switches during CPU work at every turn, the A/D converter that adjacent 2 tunnel unipolar voltage differences are sent in the single-chip microcomputer carries out analog to digital conversion, CPU with the conversion digital quantity and magnitude of voltage correspondence, thereby obtain monitoring point voltage.But when singlechip CPU is interfered, signal on the I/O port of its control optoelectronic switch may overturn, by 0 change 1 or by 1 change 0, when signal is when becoming 1 by 0, be short-circuited causing signal on the I/O port to be all two electrodes of 1, make this road single electrode voltage also seal among the CPU.Higher voltage has been added on the CPU, gently then causes to burn out CPU, and is heavy then cause the consequence that burns out electrode.
The utility model content
The purpose of this utility model is exactly the fuel cell voltage monitoring apparatus that a kind of safety and precise is provided for the defective that overcomes above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions: a kind of fuel cell voltage monitoring apparatus of safety and precise, it is characterized in that, this device comprises the single battery voltage detecting device, fuel cell controller, described single battery voltage detecting device comprises some differential amplifiers, some multi-way switchs, single-chip microcomputer with controller zone bus (CAN bus) communication interface, described single-chip microcomputer comprises A/D converter and CPU, described some differential amplifiers connect one to one with the monocell that needs monitoring, voltage difference between two single electrodes of monitoring fuel cell pile, described multi-way switch switches disconnection or conducting in turn under the control of CPU, the differential amplifier output voltage signal that described A/D converter obtains during with the multi-way switch conducting is converted to digital signal, described CPU obtains this digital signal and obtains monitoring information to fuel battery voltage by analysis, and single-chip microcomputer sends to fuel cell controller with this monitoring information by the CAN bus.
Described differential amplifier is a kind of accurate low-power consumption unity gain differential amplifier, bigger input range is arranged under normal mode, it is made up of the ultraprecise bipolar operation amplifier of a band superhigh precision film resistor network, more accurate 1V/1 differential gain is arranged and higher rejection ratio is arranged under the common mode mode, the temperature characteristics of resistor network brilliance is applicable to-40 ℃ to+85 ℃ of industry spot environment.
Every adjacent two single electrodes of described fuel cell use a differential amplifier, and when monitoring had a plurality of unipolar fuel cell pile voltage, order adopted the multi-disc differential amplifier; Described differential amplifier has low, high two voltage signal input end Vin-, Vin+, an output terminal V
oEach single electrode of fuel cell has a voltage output end; First unipolar voltage output end only links to each other with the low-voltage input end Vin-of first differential amplifier in the fuel cell pile, the unipolar voltage output end of the last sheet only links to each other with the high voltage input end Vin+ of the last sheet differential amplifier, other each unipolar voltage output end is divided into two-way, links to each other with the high and low voltage input end of adjacent two differential amplifiers respectively.
The corresponding connection of output terminal of described multi-way switch input end and differential amplifier when the number of difference amplifier surpasses the input end linking number of a multi-way switch, is adopted a plurality of multi-way switchs, and multi-way switch is logical at CPU control lower whorl conductance.
The input end of described A/D converter links to each other with the output terminal of multi-way switch, when adopting a plurality of multi-way switch, and a plurality of A/D converters of corresponding employing.
Described fuel cell pack can be provided with one or more this fuel-cell single-cell voltage monitors according to what of the monocell sum of being formed.
Described monitoring device can be in real time analyzed the performance of the fuel cell electrode of being monitored, the analytical information of described monitoring point comprises the numbering and the magnitude of voltage of one or several monitoring point that voltage is minimum, when the voltage of certain monitoring point is lower than the ultimate value that fuel cell electrode allows and surpasses the pass machine information that permission produced during the time, when the voltage of certain monitoring point is lower than the fault value that fuel cell electrode allows and surpasses the failure message that permission produced during the time, the total voltage value of all monitoring points.
Described monitoring device can select to send all monitoring point magnitudes of voltage.
The utility model has overcome the defective in original technology owing to adopted above technical scheme.Compared with prior art, the utlity model has following advantage:
1. owing to adopt a slice differential amplifier between per two electrodes, so can not produce short circuit phenomenon between the electrode, guarantee the safety of electrode and CPU.
2. owing to adopted high-precision differential operational amplifier, improved the measuring accuracy of cell voltage.
3. controller can obtain the electrode serviceability in real time.
4. reduced the data communication amount.
5. significantly reduced the data processing amount of controller.Each voltage monitor is to the analytical information that carries out of monitoring point voltage, and whether notification controller carries out actions such as emergency cutoff, fault handling.
6. can learn the position of the electrode that breaks down rapidly.
Description of drawings
Fig. 1 is original fuel battery voltage single battery voltage detecting device electrical block diagram;
Fig. 2 is original fuel cell voltage monitoring apparatus schematic diagram;
Fig. 3 is existing fuel battery voltage single battery voltage detecting device electrical block diagram;
Fig. 4 is existing fuel cell voltage monitoring apparatus schematic diagram;
Fig. 5 is the input/output port synoptic diagram of differential operational amplifier.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Consult Fig. 3, Fig. 4.Fig. 3 is the electrical block diagram for a kind of example of fuel battery voltage single battery voltage detecting device of the present utility model, comprise some differential amplifiers 302, some multi-way switchs 303, A/D converter 304 that comprises in the single-chip microcomputer and CPU 305, some differential amplifiers 302 connect one to one with the monocell 301 that needs monitoring, voltage difference between two single electrodes of monitoring fuel cell pile 301, multi-way switch 303 switches disconnection or conducting in turn under the control of CPU 305, the differential amplifier output voltage signal that A/D converter 304 obtains during with multi-way switch 303 conductings is converted to digital signal, and CPU305 obtains this digital signal and obtains monitoring information to fuel battery voltage by analysis.In conjunction with Fig. 4, the single-chip microcomputer in the fuel battery voltage single battery voltage detecting device sends to fuel cell controller 403 with monitoring information by CAN bus 404.In the figure, this device detects monocell and adds up to 32 the tunnel.
Consult Fig. 5, be the input/output port synoptic diagram of differential operational amplifier, Vin+, Vin-are two height voltage input ends of differential amplifier, V
oVoltage output end for differential amplifier.
In conjunction with concrete components and parts model the utility model is further described below.
In conjunction with Fig. 2, differential amplifier adopts INA148 ± 200V common mode voltage difference amplifier, CPU adopts 32 ARM chips of LPC2119 monolithic of PHILIPS company, be with 4 road A/D converters in it, band CAN bus interface, multi-way switch adopts 74,HC4,051 eight channel multiplexers, and its course of work is as follows:
1. measure voltage difference V between two plate electrodes with INA148
o=(Vin+)-(Vin-)
2. select 1 multi-way switch between 8 plate electrodes, to switch in turn with 8.
3. with V
oSend A/D to change.
4. with digital quantity and the magnitude of voltage correspondence changed.
5. repeat the above 1-4 step, obtain the magnitude of voltage of 32 path electrodes.
6. the voltage difference between each electrode is obtained total voltage with the program addition.
Embodiment during in conjunction with the voltage difference of the 4th, 5 liang of plate electrode measuring fuel cell pile is further described below method of the present utility model.
In conjunction with Fig. 2, when measuring the voltage difference of 4,5 liang of plate electrodes of fuel cell pile when needs, the course of work is as follows:
1. be connected on 4,5 liang of INA148 between the plate electrode and obtained the mould of electrode 4 and electrode 5 voltage differences
Analog signal V
o=(Vin+)-(Vin-).
2. use the P0.16 of LPC2119, P0.17, three I/O mouths of P0.18 carry out gating to multi-way switch 1, and the strobe state table is as follows:
| P0.18 | P0.17 | P0.16 | The electrode electrode voltage of gating is poor |
| 0 | 0 | 0 | 1,2 electrode voltage is poor |
| 0 | 0 | 1 | 2,3 electrode voltages are poor |
| 0 | 1 | 0 | 3,4 electrode voltages are poor |
| 0 | 1 | 1 | 4,5 electrode voltages are poor |
| 1 | 0 | 0 | 5,6 electrode voltages are poor |
| 1 | 0 | 1 | 6,7 electrode voltages are poor |
| 1 | 1 | 0 | 7,8 electrode voltages are poor |
| 1 | 1 | 1 | 8,9 electrode voltages are poor |
The making software programmed control can make P0.18=0, P0.17=1, P0.16=1, gating multi-way switch.
With A/D1 to V
oCarry out digital-to-analog conversion.
4. with digital quantity and the magnitude of voltage correspondence changed.
5. acquire the voltage difference of 4,5 liang of plate electrodes.
The embodiment that analyzes the monitoring information of fuel battery voltage in conjunction with single-chip microcomputer is further described below method of the present utility model.
In conjunction with Fig. 4, the specific implementation process of the monitoring information of single-chip microcomputer analysis fuel battery voltage is as follows:
1. sampling filter
Single-chip microcomputer is selected measurement point by sheet choosing, every 5ms to fuel cell pack 301 in each monitoring point once sampling, i.e. per second sampling 200 times.Per 20 times measured value, removal maximal value, minimum rear weight calculating mean value obtain measured value.Obtain the one-shot measurement value every 100ms like this.
2. data communication
The above-mentioned measured value that at first adds up obtains total voltage.Calculate the numbering and the magnitude of voltage of the minimum monitoring point of magnitude of voltage according to above-mentioned measured value.When the voltage of a certain monitoring point is lower than the ultimate value that fuel cell electrode allows and surpasses permission during the time, produces a pass machine information.When the voltage of a certain monitoring point is lower than the fault value that fuel cell electrode allows and surpasses permission during the time, produce a failure message.Above-mentioned information is sent on the CAN bus by a frame (multiframe) data.
Other
When using activated electrode etc. and need know the occasion of each monitoring point voltage, allow the user to activate the function that sends all monitoring point magnitudes of voltage.
For example, on 50KW fuel cell power generation station, have 480 electrodes, 2 electrodes of each voltage monitoring point monitoring have 240 voltage monitoring points.Fuel cell is divided into four modules, uses four voltage monitors, 60 voltage monitoring points of each voltage monitor monitoring.Use said method, each voltage monitor interval 0.2s sends the fuel cell electrode ruuning situation of the voltage monitoring point of once being monitored to controller.Four voltage monitors send 20 frame CAN data to controller altogether (if the common practice reaches the situation of 0.2s to the once all voltage monitoring points of controller notice, needs to send 300 frame CAN data at least.Voltage monitoring point/maximum voltage monitoring point data/time intervals of every frame CAN).
Claims (8)
1. the fuel cell voltage monitoring apparatus of a safety and precise, it is characterized in that, this device comprises the single battery voltage detecting device, fuel cell controller, described single battery voltage detecting device comprises some differential amplifiers, some multi-way switchs, single-chip microcomputer with controller zone bus CAN bus communication interface, described single-chip microcomputer comprises A/D converter and CPU, described some differential amplifiers connect one to one with the monocell that needs monitoring, voltage difference between two single electrodes of monitoring fuel cell pile, described multi-way switch switches disconnection or conducting in turn under the control of CPU, the differential amplifier output voltage signal that described A/D converter obtains during with the multi-way switch conducting is converted to digital signal, described CPU obtains this digital signal and obtains monitoring information to fuel battery voltage by analysis, and single-chip microcomputer sends to fuel cell controller with this monitoring information by the CAN bus.
2. the fuel cell voltage monitoring apparatus of a kind of safety and precise according to claim 1, it is characterized in that, described differential amplifier is a kind of low-power consumption unity gain differential amplifier, and it is made up of the ultraprecise bipolar operation amplifier of a band superhigh precision film resistor network.
3. the fuel cell voltage monitoring apparatus of a kind of safety and precise according to claim 1 and 2, it is characterized in that, every adjacent two single electrodes of described fuel cell use a differential amplifier, when monitoring had a plurality of unipolar fuel cell pile voltage, order adopted the multi-disc differential amplifier; Described differential amplifier has low, high two voltage signal input end Vin-, Vin+ and an output terminal V
oEach single electrode of fuel cell has a voltage output end; First unipolar voltage output end only links to each other with the low-voltage input end Vin-of first differential amplifier in the fuel cell pile, the unipolar voltage output end of the last sheet only links to each other with the high voltage input end Vin+ of the last sheet differential amplifier, other each unipolar voltage output end is divided into two-way, links to each other with the high and low voltage input end of adjacent two differential amplifiers respectively.
4. the fuel cell voltage monitoring apparatus of a kind of safety and precise according to claim 1, it is characterized in that, the corresponding connection of output terminal of described multi-way switch input end and differential amplifier, when the number of difference amplifier surpasses the input end linking number of a multi-way switch, adopt a plurality of multi-way switchs, multi-way switch is logical at CPU control lower whorl conductance.
5. the fuel cell voltage monitoring apparatus of a kind of safety and precise according to claim 1 is characterized in that, the input end of described A/D converter links to each other with the output terminal of multi-way switch, when adopting a plurality of multi-way switch, and a plurality of A/D converters of corresponding employing.
6. the fuel cell voltage monitoring apparatus of a kind of safety and precise according to claim 1, it is characterized in that, described fuel cell pack can be provided with one or more this fuel-cell single-cell voltage monitors according to what of the monocell sum of being formed.
7. the fuel cell voltage monitoring apparatus of a kind of safety and precise according to claim 1, it is characterized in that, described monitoring device can be in real time analyzed the performance of the fuel cell electrode of being monitored, the analytical information of described monitoring point comprises the numbering and the magnitude of voltage of one or several monitoring point that voltage is minimum, when the voltage of certain monitoring point is lower than the ultimate value that fuel cell electrode allows and surpasses the pass machine information that permission produced during the time, when the voltage of certain monitoring point is lower than the fault value that fuel cell electrode allows and surpasses the failure message that permission produced during the time, the total voltage value of all monitoring points.
8. the fuel cell voltage monitoring apparatus of a kind of safety and precise according to claim 1 is characterized in that, described monitoring device can select to send all monitoring point magnitudes of voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200405220U CN2828836Y (en) | 2005-03-30 | 2005-03-30 | Safety and correction voltage monitoring device for fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200405220U CN2828836Y (en) | 2005-03-30 | 2005-03-30 | Safety and correction voltage monitoring device for fuel cell |
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| Publication Number | Publication Date |
|---|---|
| CN2828836Y true CN2828836Y (en) | 2006-10-18 |
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ID=37080392
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200405220U Expired - Lifetime CN2828836Y (en) | 2005-03-30 | 2005-03-30 | Safety and correction voltage monitoring device for fuel cell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464195C (en) * | 2005-03-30 | 2009-02-25 | 上海神力科技有限公司 | Safety and precise fuel cell voltage monitoring apparatus |
| CN106443490A (en) * | 2016-11-21 | 2017-02-22 | 上海理工大学 | A fault diagnosis system for battery short-circuiting |
| CN109917181A (en) * | 2019-04-08 | 2019-06-21 | 上海大学 | A kind of System of voltage acquisition |
-
2005
- 2005-03-30 CN CNU2005200405220U patent/CN2828836Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464195C (en) * | 2005-03-30 | 2009-02-25 | 上海神力科技有限公司 | Safety and precise fuel cell voltage monitoring apparatus |
| CN106443490A (en) * | 2016-11-21 | 2017-02-22 | 上海理工大学 | A fault diagnosis system for battery short-circuiting |
| CN109917181A (en) * | 2019-04-08 | 2019-06-21 | 上海大学 | A kind of System of voltage acquisition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20090225 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |