CN102157744B - Constant voltage discharge adjusting device of fuel cell and adjusting method thereof - Google Patents
Constant voltage discharge adjusting device of fuel cell and adjusting method thereof Download PDFInfo
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- CN102157744B CN102157744B CN2011100607792A CN201110060779A CN102157744B CN 102157744 B CN102157744 B CN 102157744B CN 2011100607792 A CN2011100607792 A CN 2011100607792A CN 201110060779 A CN201110060779 A CN 201110060779A CN 102157744 B CN102157744 B CN 102157744B
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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
Abstract
The invention relates to a constant voltage discharge adjusting device of a fuel cell and an adjusting method thereof, and the constant voltage discharge adjusting device comprises a controller, an analog-digital conversion circuit, a digital-analog conversion circuit, a voltage sampling circuit, a voltage comparing circuit and a current regulating circuit, wherein the analog-digital conversion circuit is connected into analog quantity sampled voltage output by the voltage sampling circuit; the controller is connected into digital quantity sampled voltage output by the analog-digital conversion circuit; the digital-analog conversion circuit is connected into adjusted voltage output by the controller; the voltage comparing circuit is connected into analog quantity voltage output by the voltage sampling circuit and analog quantity adjusted voltage output by the digital-analog conversion circuit respectively, and control voltage is output after comparison and then connected into the current regulating circuit; and the current regulating circuit is connected with the fuel cell in series for forming a discharge loop. By adopting the adjusting device and the adjusting method, the fuel cell can be quickly and accurately controlled to set voltage for performing constant voltage discharge, thereby well overcoming the shortcoming of long constant voltage discharge adjustment time of the fuel cell.
Description
Technical field
The present invention relates to the discharge adjustment technology of fuel cell, be specifically related to a kind of fuel cell constant voltage discharge adjusting device and method of adjustment thereof.
Background technology
In the fuel cell preparation process, need to obtain the polarization curve of fuel cell, with the discharge performance of estimating fuel battery through electronic load.Usually electronic load provides multiple discharge modes such as constant-current discharge, constant voltage discharge, constant-resistance discharge, permanent power discharge fuel cell to be carried out the test of discharge performance.Electronic load can be bestowed certain constant discharge mode to fuel cell before, electronic load must pass through suitable set-up procedure, so that obtain the constant discharge mode of this kind.
With regard to the constant voltage discharge pattern, to the open circuit voltage scope of fuel cell, electronic load can be controlled fuel cell and carry out before the constant voltage discharge with certain setting voltage at 0V, must be through the constant voltage set-up procedure.In the constant voltage set-up procedure; Electronic load is according to the comparative result of setting voltage and fuel cell sampled voltage; When fuel cell voltage is higher than setting voltage, need to transfer the electric current in big fuel cell electric discharge loop that fuel cell voltage is reduced, when fuel cell voltage is lower than setting voltage; The electric current that need turn the fuel cell electric discharge loop down raises fuel cell voltage, finally makes fuel cell carry out constant voltage discharge with setting voltage.
But, in above-mentioned constant voltage set-up procedure, the rapid speed that fuel cell voltage is turned down by height gradually, and fuel cell voltage is slower by the low speed of heightening gradually; Because there is this asymmetry in the fuel battery voltage adjustment; Carry out the constant voltage adjustment if adopt the method for adjustment of symmetry; Promptly work as fuel cell voltage and be higher than setting voltage, transfer the electric current in big fuel cell electric discharge loop that fuel cell voltage is reduced gradually gradually, when fuel cell voltage is lower than setting voltage; The electric current of turning the fuel cell electric discharge loop gradually down raises fuel cell voltage gradually, and the constant voltage adjustment time will be very long so; When the pressure reduction of setting voltage and fuel cell open circuit voltage hour, the constant voltage adjustment time will be longer.
Summary of the invention
The purpose of this invention is to provide a kind of fuel cell constant voltage discharge adjusting device, can control fuel cell rapidly and accurately and carry out constant voltage discharge, well overcome long shortcoming of fuel cell constant voltage discharge adjustment time with setting voltage.
Another object of the present invention is to provide the method for adjustment of utilizing above-mentioned fuel cell constant voltage discharge adjusting device.
The present invention realizes that the technical solution of above-mentioned purpose is: a kind of fuel cell constant voltage discharge adjusting device; The voltage sampling circuit that comprises the fuel cell voltage that is used to sample; Be used for sampled voltage is converted into by analog quantity the analog to digital conversion circuit of digital quantity; Be used to export the controller of adjustment voltage; Be used for to adjust voltage and convert the D/A converting circuit of analog quantity into, be used for the voltage comparator circuit of comparison sampled voltage and adjustment voltage, be used for changing the current regulating circuit of fuel cell electric discharge loop size of current by digital quantity; Said voltage sampling circuit is connected in parallel on the positive and negative polarities of fuel cell; Analog-digital conversion circuit as described inserts the analog quantity sampled voltage of voltage sampling circuit output; Said controller inserts the digital quantity sampled voltage of analog to digital conversion circuit output; The adjustment voltage of said D/A converting circuit access controller output; Said voltage comparator circuit inserts the analog quantity voltage of voltage sampling circuit output and the analog quantity adjustment voltage of D/A converting circuit output respectively, and relatively back output control voltage is linked into current regulating circuit again; Said current regulating circuit and fuel cell series form discharge loop, by current regulating circuit the electric current of discharge loop controlled, thus the voltage at adjustment fuel cell two ends.
Be provided with the power tube that is used for changing the control loop size of current in the current regulating circuit according to the invention, said power tube inserts in the discharge loop, the conducting resistance of current regulating circuit output regulation voltage power controlling pipe, thereby the electric current of change discharge loop.
A kind of method of adjustment of above-mentioned fuel cell constant voltage discharge adjusting device may further comprise the steps:
Whether the setting voltage of (1) judging the fuel cell constant voltage discharge is smaller or equal to the open circuit voltage of fuel cell;
(2) when the judged result of step (1) when being, whether the difference of judging open circuit voltage and setting voltage greater than critical voltage; When the judged result of step (1) for not the time, be failure to actuate;
Above-mentioned judged result when step (2) is when being:
(a) controller with setting voltage total bias voltage of setovering, is initially adjusted voltage according to the direction that fuel battery voltage is raise;
(b) controller will initially be adjusted voltage and write adjustment voltage toward D/A converting circuit, and fuel cell voltage is raise;
(c) carry out the first order, the second level ... The constant voltage adjustment of N level departure,
Wherein, the i level, the step of the departure constant voltage discharge adjustment of i=1～N is following:
(c1) controller reads the sampled voltage that analog to digital conversion circuit obtains fuel cell;
Whether the pressure reduction of (c2) judging sampled voltage and setting voltage smaller or equal to the departure of the corresponding levels, when judged result for not the time, forward step (c3) to; When judged result when being, finish constant voltage adjustment at the corresponding levels;
(c3) controller will be adjusted voltage according to the direction that fuel battery voltage is reduced and adjust with the step-length of the corresponding levels, thereby obtain current adjustment voltage;
(c4) controller writes adjustment voltage with current adjustment voltage toward D/A converting circuit, and fuel cell voltage is reduced, and forwards step (c1) to;
When the judged result of step (2) for not the time:
(A) carry out the first order, the second level ... The constant voltage adjustment of N level departure,
Wherein, the i level, the step of the departure constant voltage discharge adjustment of i=1～N is following:
I. controller according to the direction that fuel battery voltage is raise with the reference voltage at the corresponding levels bias voltage at the corresponding levels of setovering, thereby obtain initial adjustment voltage; For the 1st grade of constant voltage discharge adjustment, reference voltage=setting voltage at the corresponding levels is for the adjustment of other grade constant voltage discharge, reference voltage at the corresponding levels=current adjustment voltage;
II. controller will initially be adjusted voltage and write adjustment voltage toward D/A converting circuit, and fuel cell voltage is raise;
III. controller reads the sampled voltage that analog to digital conversion circuit obtains fuel cell;
Whether the pressure reduction of IV. judging sampled voltage and setting voltage smaller or equal to the departure of the corresponding levels, when judged result for not the time, forward step (V) to; When judged result when being, finish constant voltage adjustment at the corresponding levels;
V. controller will be adjusted voltage according to the direction that fuel battery voltage is reduced and adjust with the step-length of the corresponding levels, thereby obtain current adjustment voltage;
VI. controller writes adjustment voltage with current adjustment voltage toward the digital-to-analogue shifting circuit, and fuel cell voltage is reduced, and forwards step (III) to.
The voltage that controller of the present invention directly reads through analog to digital conversion circuit is measuring voltage V
AD, the sampled voltage V of fuel cell
Sample=F
1(V
AD), function F wherein
1(V) mapping relations are by the parameter determining of analog to digital conversion circuit, voltage sampling circuit.
Controller of the present invention is according to sampled voltage V
SampleDraw adjustment voltage V with the comparative result of setting voltage
Adjust, controller is toward the adjustment voltage V of the actual output of D/A converting circuit
DA=F
2(V
Adjust), function F wherein
2(V) mapping relations are by analog to digital conversion circuit, voltage sampling circuit, D/A converting circuit decision.
In said step (a), total bias voltage is greater than the 1st grade of departure Δ V in the step (c)
1
In said step (c), the departure Δ V of i+1 level
I+1Departure Δ V less than the i level
i, the departure Δ V of N level
NEqual the constant voltage departure, and the adjustment step-length of i level is less than or equal to the departure Δ V of this grade
i
In said step (A), the bias voltage V of i+1 level
R (i+1)Bias voltage V less than the i level
R (i), the departure Δ V of i+1 level
I+1Departure Δ V less than the i level
i, the departure Δ V of N level
NEqual the constant voltage departure, the adjustment step-length of i level is less than or equal to the departure Δ V of this grade
i, the bias voltage V of i+1 level
R (i)Departure Δ V greater than the i level
i
The invention has the beneficial effects as follows:
1. the circuit structure of adjusting device of the present invention is simple, and error is little, installs and implements conveniently.
2. method of adjustment of the present invention can be controlled fuel cell rapidly and accurately and carry out constant voltage discharge with setting voltage.
3. the constant voltage adjustment time of method of adjustment of the present invention lacks, and has accelerated the speed of the performance test technology in the fuel cell preparation process.
Description of drawings
Fig. 1 is the electrical block diagram of adjusting device specific embodiment of the present invention;
Fig. 2 is the main program flow chart of the specific embodiment of method of adjustment of the present invention;
Fig. 3 for the present invention when step (2) judged result be the program flow diagram when being;
Fig. 4 is the program flow diagram of the i level departure constant voltage discharge adjustment of step of the present invention (c);
Fig. 5 for the present invention when step (2) judged result program flow diagram for not the time;
Fig. 6 is the program flow diagram of the i level departure constant voltage discharge adjustment of step of the present invention (A).
Embodiment
The invention provides a kind of fuel cell constant voltage discharge adjusting device, as shown in Figure 1, this device comprises controller 1, analog to digital conversion circuit 2, D/A converting circuit 3, voltage sampling circuit 4, voltage comparator circuit 5, current regulating circuit 6.The voltage sampling circuit fuel cell voltage that is used to sample; Analog to digital conversion circuit is used for converting sampled voltage into digital quantity by analog quantity; Controller is used for output adjustment voltage; D/A converting circuit is used for converting adjustment voltage into analog quantity by digital quantity, and voltage comparator circuit is used for comparison sampled voltage and adjustment voltage, and current regulating circuit is used for changing fuel cell electric discharge loop size of current;
Voltage sampling circuit is connected in parallel on the positive and negative polarities of fuel cell; Analog to digital conversion circuit inserts the analog quantity sampled voltage of voltage sampling circuit output; Controller inserts the digital quantity sampled voltage of analog to digital conversion circuit output; The adjustment voltage of D/A converting circuit access controller output; Voltage comparator circuit inserts the analog quantity voltage of voltage sampling circuit output and the analog quantity adjustment voltage of D/A converting circuit output respectively, and relatively back output control voltage is linked into current regulating circuit again; Said current regulating circuit and fuel cell series form discharge loop, by current regulating circuit the electric current of discharge loop controlled, thus the voltage at adjustment fuel cell two ends.Be provided with the power tube that is used for changing the control loop size of current in the current regulating circuit; Power tube inserts in the discharge loop; The conducting resistance of current regulating circuit output regulation voltage power controlling pipe, thus the size of the electric current of change discharge loop changes the voltage at fuel cell two ends.
Controller among the present invention can be selected general single-chip microcomputer or microprocessor for use; The constant voltage departure requirement of fuel cell; Analog to digital conversion circuit can be selected suitable conventional analog to digital converter ADC for use, requires as long as the resolution of this analog to digital converter ADC satisfies the constant voltage departure.The constant voltage departure requirement of fuel cell, said D/A converting circuit can be selected suitable conventional digital to analog converter DAC for use, require as long as the resolution of this digital to analog converter DAC satisfies the constant voltage departure.Said voltage sampling circuit is selected suitable partial pressure device commonly used for use, as long as can be with the measuring range of the analog to digital converter ADC of fuel cell voltage commensurate in scope in the analog to digital conversion circuit.Said voltage comparator circuit can select for use a conventional comparison amplifier to realize.The power tube of proper parameter and the number of confirming used power tube are selected in the requirement of the power of fuel cell, voltage, current parameters, said current regulating circuit for use.
The method of adjustment of above-mentioned fuel cell constant voltage discharge adjusting device, the characteristic of fuel cell: at first, confirm the critical voltage of step among Fig. 2; Then, confirm the total bias voltage in the constant voltage discharge method of adjustment one, confirm the N value of its N level departure constant voltage adjustment, and the departure and adjustment step-length of confirming its departure constant voltage adjustment at different levels; At last, confirm the N value of N level departure constant voltage adjustment in the constant voltage discharge method of adjustment two, and bias voltage, departure, the adjustment step-length of confirming its departure constant voltage adjustment at different levels.
Be not more than under the situation of fuel cell open circuit voltage at setting voltage: if when the pressure reduction of setting voltage and fuel cell open circuit voltage surpasses critical voltage, controller is adjusted according to constant voltage discharge method of adjustment one described step; When if the pressure reduction of setting voltage and fuel cell open circuit voltage is no more than critical voltage, controller is adjusted according to constant voltage discharge method of adjustment two described steps.
Method of adjustment of the present invention specifically may further comprise the steps, shown in Fig. 2～6:
Whether the setting voltage of (1) judging the fuel cell constant voltage discharge is smaller or equal to the open circuit voltage of fuel cell;
(2) when the judged result of step (1) when being, whether the difference of judging open circuit voltage and setting voltage greater than critical voltage;
When the judged result of step (2) when being, get into constant voltage discharge method of adjustment one, as shown in Figure 3:
(a) controller with setting voltage total bias voltage of setovering, is initially adjusted voltage according to the direction that fuel battery voltage is raise;
(b) controller will initially be adjusted voltage and write adjustment voltage toward D/A converting circuit, and fuel cell voltage is raise;
(c) carry out the first order, the second level ... The constant voltage adjustment of N level departure,
Wherein, the i level, the step of the departure constant voltage discharge adjustment of i=1～N is following, as shown in Figure 4:
(c1) controller reads the sampled voltage that analog to digital conversion circuit obtains fuel cell;
Whether the pressure reduction of (c2) judging sampled voltage and setting voltage smaller or equal to the departure of the corresponding levels, when judged result for not the time, forward step (c3) to; When judged result when being, finish constant voltage adjustment at the corresponding levels;
(c3) controller will be adjusted voltage according to the direction that fuel battery voltage is reduced and adjust with the step-length of the corresponding levels, thereby obtain current adjustment voltage;
(c4) controller writes adjustment voltage with current adjustment voltage toward D/A converting circuit, and fuel cell voltage is reduced, and forwards step (c1) to;
When the judged result of step (2) for not the time, get into constant voltage discharge method of adjustment two, as shown in Figure 5:
(A) carry out the first order, the second level ... The constant voltage adjustment of N level departure,
Wherein, the i level, the step of the departure constant voltage discharge adjustment of i=1～N is following, as shown in Figure 6:
I. controller according to the direction that fuel battery voltage is raise with the reference voltage at the corresponding levels bias voltage at the corresponding levels of setovering, thereby obtain initial adjustment voltage; For the 1st grade of constant voltage discharge adjustment, reference voltage=setting voltage at the corresponding levels is for the adjustment of other grade constant voltage discharge, reference voltage at the corresponding levels=current adjustment voltage;
II. controller will initially be adjusted voltage and write adjustment voltage toward D/A converting circuit, and fuel cell voltage is raise;
III. controller reads the sampled voltage that analog to digital conversion circuit obtains fuel cell;
Whether the pressure reduction of IV. judging sampled voltage and setting voltage smaller or equal to the departure of the corresponding levels, when judged result for not the time, forward step (V) to; When judged result when being, finish constant voltage adjustment at the corresponding levels;
V. controller will be adjusted voltage according to the direction that fuel battery voltage is reduced and adjust with the step-length of the corresponding levels, thereby obtain current adjustment voltage;
VI. controller writes adjustment voltage with current adjustment voltage toward the digital-to-analogue shifting circuit, and fuel cell voltage is reduced, and forwards step (III) to.
In step (2), when the judged result of step (1) for not the time, be failure to actuate.
The voltage that controller of the present invention directly reads through analog to digital conversion circuit is measuring voltage V
AD, the sampled voltage V of fuel cell
Sample=F
1(V
AD), function F wherein
1(V) mapping relations are by the parameter determining of analog to digital conversion circuit, voltage sampling circuit.
Controller of the present invention is according to sampled voltage V
SampleDraw adjustment voltage V with the comparative result of setting voltage
Adjust, controller is toward the adjustment voltage V of the actual output of D/A converting circuit
DA=F
2(V
Adjust), function F wherein
2(V) mapping relations are by analog to digital conversion circuit, voltage sampling circuit, D/A converting circuit decision.
In step (a), total bias voltage is greater than the 1st grade of departure Δ V in the step (c)
1
In step (c), the departure Δ V of i+1 level
I+1Departure Δ V less than the i level
i, the departure Δ V of N level
NEqual the constant voltage departure, and the adjustment step-length of i level is less than or equal to the departure Δ V of this grade
i
In step (A), the bias voltage V of i+1 level
R (i+1)Bias voltage V less than the i level
R (i), the departure Δ V of i+1 level
I+1Departure Δ V less than the i level
i, the departure Δ V of N level
NEqual the constant voltage departure, the adjustment step-length of i level is less than or equal to the departure Δ V of this grade
i, the bias voltage V of i+1 level
R (i)Departure Δ V greater than the i level
i
Execution mode of the present invention is not limited thereto; According to foregoing of the present invention; Utilize the ordinary skill knowledge and the customary means of this area; Do not breaking away under the above-mentioned basic fundamental thought of the present invention prerequisite, the present invention can also make modification, replacement or the change of other various ways, all drops within the rights protection scope of the present invention.
Claims (4)
1. fuel cell constant voltage discharge adjusting device; It is characterized in that: the voltage sampling circuit that comprises the fuel cell voltage that is used to sample; Be used for sampled voltage is converted into by analog quantity the analog to digital conversion circuit of digital quantity; Be used to export the controller of adjustment voltage; Be used for to adjust voltage and convert the D/A converting circuit of analog quantity into, be used for the voltage comparator circuit of comparison sampled voltage and adjustment voltage, be used for changing the current regulating circuit of fuel cell electric discharge loop size of current by digital quantity; Said voltage sampling circuit is connected in parallel on the positive and negative polarities of fuel cell; Analog-digital conversion circuit as described inserts the analog quantity sampled voltage of voltage sampling circuit output; Said controller inserts the digital quantity sampled voltage of analog to digital conversion circuit output; The adjustment voltage of said D/A converting circuit access controller output; Said voltage comparator circuit inserts the analog quantity voltage of voltage sampling circuit output and the analog quantity adjustment voltage of D/A converting circuit output respectively, and relatively back output control voltage is linked into current regulating circuit again; Said current regulating circuit and fuel cell series form discharge loop, by current regulating circuit the electric current of discharge loop adjusted, thus the voltage at adjustment fuel cell two ends; Be provided with the power tube that is used for changing the control loop size of current in the said current regulating circuit, said power tube inserts in the discharge loop, the conducting resistance of current regulating circuit output regulation voltage power controlling pipe, thereby the electric current of change discharge loop.
One kind according to claim 1 the device fuel cell constant voltage discharge method of adjustment, it is characterized in that may further comprise the steps:
Whether the setting voltage of (1) judging the fuel cell constant voltage discharge is smaller or equal to the open circuit voltage of fuel cell;
(2) when the judged result of step (1) when being, whether the difference of judging open circuit voltage and setting voltage greater than critical voltage; When the judged result of step (1) for not the time, be failure to actuate;
When the judged result of step (2) when being, take following steps:
(a) controller with setting voltage total bias voltage of setovering, is initially adjusted voltage according to the direction that fuel battery voltage is raise;
(b) controller will initially be adjusted voltage and write adjustment voltage toward D/A converting circuit, and fuel cell voltage is raise;
(c) carry out the first order, the second level ... The constant voltage adjustment of N level departure;
When the judged result of step (2) for not the time:
(A) carry out the first order, the second level ... The constant voltage adjustment of N level departure;
In said step (c), the i level, the step of the departure constant voltage discharge adjustment of i=1 ~ N is following:
(c1) controller reads the sampled voltage that analog to digital conversion circuit obtains fuel cell;
Whether the pressure reduction of (c2) judging sampled voltage and setting voltage smaller or equal to the departure of the corresponding levels, when judged result for not the time, forward step (c3) to; When judged result when being, finish constant voltage adjustment at the corresponding levels;
(c3) controller will be adjusted voltage according to the direction that fuel battery voltage is reduced and adjust with the step-length of the corresponding levels, thereby obtain current adjustment voltage;
(c4) controller writes adjustment voltage with current adjustment voltage toward D/A converting circuit, and fuel cell voltage is reduced, and forwards step (c1) to;
In said step (A), the i level, the step of the departure constant voltage discharge adjustment of i=1 ~ N is following:
I. controller according to the direction that fuel battery voltage is raise with the reference voltage at the corresponding levels bias voltage at the corresponding levels of setovering, thereby obtain initial adjustment voltage; For the 1st grade of constant voltage discharge adjustment, reference voltage=setting voltage at the corresponding levels is for the adjustment of other grade constant voltage discharge, reference voltage at the corresponding levels=current adjustment voltage;
II. controller will initially be adjusted voltage and write adjustment voltage toward D/A converting circuit, and fuel cell voltage is raise;
III. controller reads the sampled voltage that analog to digital conversion circuit obtains fuel cell;
IV. whether the pressure reduction of judging sampled voltage and setting voltage smaller or equal to the departure of the corresponding levels, when judged result for not the time, forward step (V) to; When judged result when being, finish constant voltage adjustment at the corresponding levels;
V. controller will be adjusted voltage according to the direction that fuel battery voltage is reduced and adjust with the step-length of the corresponding levels, thereby obtain current adjustment voltage;
VI. controller writes adjustment voltage with current adjustment voltage toward D/A converting circuit, and fuel cell voltage is reduced, and forwards step (III) to;
In said step (a), total bias voltage is greater than the 1st grade of departure Δ V in the step (c)
1
In said step (c), the departure Δ V of i+1 level
I+1Departure Δ V less than the i level
i, the departure Δ V of N level
NEqual the constant voltage departure, and the adjustment step-length of i level is less than or equal to the departure Δ V of this grade
i
In said step (A), the bias voltage V of i+1 level
R (i+1)Bias voltage V less than the i level
R (i), the departure Δ V of i+1 level
I+1Departure Δ V less than the i level
i, the departure Δ V of N level
NEqual the constant voltage departure, the adjustment step-length of i level is less than or equal to the departure Δ V of this grade
i, the bias voltage V of i+1 level
R (i)Departure Δ V greater than the i level
i
3. fuel cell constant voltage discharge method of adjustment according to claim 2 is characterized in that: the voltage that controller directly reads through analog to digital conversion circuit is measuring voltage V
AD, the sampled voltage V of fuel cell
Sample=F
1(V
AD), function F wherein
1(V) mapping relations are by the parameter determining of analog to digital conversion circuit, voltage sampling circuit.
4. fuel cell constant voltage discharge method of adjustment according to claim 3, it is characterized in that: controller is according to sampled voltage V
SampleDraw adjustment voltage V with the comparative result of setting voltage
Adjust, controller is toward the adjustment voltage V of the actual output of D/A converting circuit
DA=F
2(V
Adjust), function F wherein
2(V) mapping relations are by analog to digital conversion circuit, voltage sampling circuit, D/A converting circuit decision.
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| CN2011100607792A CN102157744B (en) | 2011-03-14 | 2011-03-14 | Constant voltage discharge adjusting device of fuel cell and adjusting method thereof |
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|---|---|---|---|
| CN2011100607792A CN102157744B (en) | 2011-03-14 | 2011-03-14 | Constant voltage discharge adjusting device of fuel cell and adjusting method thereof |
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| CN102157744B true CN102157744B (en) | 2012-12-26 |
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| CA2925348A1 (en) * | 2013-10-06 | 2015-04-09 | Abominable Labs, Llc | Battery compensation system using pwm |
| CN108957065B (en) * | 2018-08-29 | 2020-09-01 | 深圳市鼎阳科技股份有限公司 | Electronic load circuit |
| CN111509264B (en) * | 2020-04-21 | 2022-06-14 | 电子科技大学 | Constant power test method for optimal working point of air-cooled fuel cell |
| CN114915282B (en) * | 2022-07-15 | 2022-11-25 | 深圳市单源半导体有限公司 | Discharge circuit with stable power and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132068A (en) * | 2006-08-25 | 2008-02-27 | 比亚迪股份有限公司 | Activation method for membrane electrode of fuel cell |
| CN101154821A (en) * | 2007-09-21 | 2008-04-02 | 中兴通讯股份有限公司 | Quick charging device and method for nickel-hydrogen battery |
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| JP2007200726A (en) * | 2006-01-26 | 2007-08-09 | Canon Inc | Activating device and manufacturing method of fuel cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132068A (en) * | 2006-08-25 | 2008-02-27 | 比亚迪股份有限公司 | Activation method for membrane electrode of fuel cell |
| CN101154821A (en) * | 2007-09-21 | 2008-04-02 | 中兴通讯股份有限公司 | Quick charging device and method for nickel-hydrogen battery |
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| JP特开2007-200726A 2007.08.09 |
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