CN201142343Y - Self-starting and self-adaptation control circuit for air supply of fuel battery set - Google Patents

Self-starting and self-adaptation control circuit for air supply of fuel battery set Download PDF

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Publication number
CN201142343Y
CN201142343Y CNU2007200152936U CN200720015293U CN201142343Y CN 201142343 Y CN201142343 Y CN 201142343Y CN U2007200152936 U CNU2007200152936 U CN U2007200152936U CN 200720015293 U CN200720015293 U CN 200720015293U CN 201142343 Y CN201142343 Y CN 201142343Y
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China
Prior art keywords
control circuit
blower fan
self
output
battery pack
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Expired - Lifetime
Application number
CNU2007200152936U
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Chinese (zh)
Inventor
王俊清
韩亚民
孙德尧
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Sunrise Power Co Ltd
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Sunrise Power Co Ltd
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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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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Abstract

The utility model relates to a self-starting and self-adapting control circuit used for feeding air to a fuel battery pack. The utility model is characterized in that the control circuit comprises a voltage stabilizing circuit unit, a control circuit unit, a signal acquisition unit and a field-effect transistor G; the voltage stabilizing circuit unit is used for providing a stabilized power supply to the control circuit; the control circuit unit takes the currents of the battery pack and a fan as comparison signals, and controls the conduction of the field-effect transistor G through adopting the control modes of feedback and compare; the signal acquisition unit is used for acquiring the current output by the battery pack and the current used by the fan, and transfers the acquired currents to the control circuit unit; the control circuit not only solves the problem that the DC fan which is directly used to feed air can be easily burnt out due to the great change of the voltage output by the fuel battery pack, but also solves the conflict that the supply and the demand of the air volume are not consistent, thereby improving the performance of the fuel battery pack; the self-starting and self-adapting control circuit has the advantages of simple structure and less used components, thus, not only the production is convenient, but also the cost is very low, thereby being applicable to wide popularization.

Description

Self-starting, adaptation control circuit that the fuel battery air is supplied with
Technical field
The utility model relates to a kind of fuel battery air feeder, relates in particular to self-starting, adaptation control circuit that a kind of fuel battery air is supplied with.
Background technology
In, low power fuel battery is general all selects very low operating pressure, and, adopt the scheme that dc fan directly is connected on to be provided air and the heat of its in-fighting is taken away for fuel battery in the output of fuel battery usually in order to reduce cost, simplified system.But obviously there are some shortcomings in this scheme: the output voltage of fuel battery increases with load and decays, and output voltage only is the 60-70% of unloaded output voltage during rated power, even lower.Blower fan is not if controlled, and overtension causes blower fan to damage in the time of may be because of zero load; Even blower fan can be worked, do not controlled then unloaded air quantity maximum, in maximum power when output, be the wind supply quantity minimum instead; The demand of this and fuel battery is on the contrary.So being badly in need of a kind of novel blower fan control system comes out.
Summary of the invention
The purpose of this utility model is at the deficiencies in the prior art, develops a kind of easy implementation, high reliability and fuel battery air supply control circuit cheaply.The control thought that it adopts is: use DC fan or dc fan to be the fuel battery air supply, and be the control circuit that independent variable is built into the blower fan servo-actuated with the output current of fuel battery; When fuel battery was opened, control circuit made blower fan be in minimum speed; When the fuel cell load increased, control circuit made the rotating speed of blower fan increase with load; When fuel battery reached rated power output, control circuit made blower fan reach maximum speed.The technological means that adopts is as follows:
Self-starting, adaptation control circuit that a kind of fuel battery air is supplied with is characterized in that comprising voltage stabilizing circuit unit, control circuit unit, signal gathering unit and field effect transistor G;
Described voltage stabilizing circuit unit is used for providing stable power for control circuit; Described control circuit unit is a comparison signal with the electric current of battery pack and blower fan, adopts feedback ratio control mode to control the size of field effect transistor G conducting; Described signal gathering unit is used for gathering the electric current of battery pack output and the electric current that blower fan uses, and the electric current of gathering is passed in the control circuit unit; During use I, II terminal are connect the positive and negative utmost point of load, by signal gathering unit the electric current of battery pack output and the electric current of blower fan use are gathered, and the electric current that collects passed in the control circuit unit, after the processing of control circuit unit, Control current is input to the drive end of field effect transistor G, to realize control to blower fan.Voltage stabilizing chip in the described voltage stabilizing circuit unit adopts 7812 chips; Described signal gathering unit mainly is made up of resistance, and wherein resistance R 1 is finished the detection to the battery pack output current, and resistance R 2 is finished the detection of blower fan being used electric current.
Described control circuit unit is made up of operational amplifier and discrete component; Resistance R wherein 1For the sampling resistor of material battery pack output current, with amplifier IC 1Formation is to the detection of fuel cell output current; Amplifier IC 1Output deliver to amplifier IC 3Positive input terminal, if the output current of battery pack increases like this, amplifier IC 3Output will be high, it drives field effect transistor G, thus the control rotation speed of fan improves; The current detecting of blower fan is by resistance R 2Sampling and amplifier IC 2Finish, this must cause amplifier IC 2Output voltage raises, and this signal is added to amplifier IC 3Negative terminal, constitute negative feedback, thereby control amplifier IC 3The rising of output; The output current that forms each battery pack thus changes and all causes the corresponding variation of blower fan electric current and be in new stable state.Described IC 1, IC 2And IC 3Be three operational amplifiers in the LM324 integrated circuit; Described blower fan is direct current aerofoil fan or DC fan.
Owing to adopted technique scheme, the utility model provide in, small-power fuel battery air supply with blower fan the control method clear thinking, design is easy, components and parts are few and it is inexpensive easily to purchase, make and debug all than being easier to, not only having solved dc fan changes greatly directly with the problem of dc fan for air easy burn-out blower fan because of fuel cell output voltage, and solved the inconsistent contradiction of air quantity supply and demand, improved the performance of fuel battery.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 1 is a specification digest accompanying drawing of the present utility model.
Embodiment
The control method key that the fuel battery air is supplied with is the servo-actuated control of blower fan electric current with the fuel battery output current; Detect the output current of fuel battery 4 and the electric current of blower fan 5 respectively, and unified yardstick (finishing) by dividing other sampling and amplifier, deliver to the anode and the negative terminal of differential amplifier then, so the output nature of differential amplifier increases with the output current of fuel battery; This signal drives fan speed increasing again, and the blower fan electric current increases and feed back to the negative terminal of differential amplifier, thereby reaches new more high-order balance.
As Fig. 1 is control circuit figure of the present utility model, comprise voltage stabilizing circuit unit 1, control circuit unit 2,
Signal gathering unit 3 and field effect transistor G; Voltage stabilizing circuit unit 1 is used for providing stable power for control circuit by voltage stabilizing chip 7812; Control circuit unit 2 is a comparison signal with the electric current of battery pack 4 and blower fan 5, adopts feedback ratio control mode to control the size of field effect transistor G conducting; Signal gathering unit 3 is used for gathering the electric current of battery pack 4 outputs and the electric current that blower fan 5 uses, and the electric current of gathering is passed in the control circuit unit 2; During use I, II terminal are connect the positive and negative utmost point of load, by voltage stabilizing circuit unit 1 electric current of battery pack 4 outputs and the electric current of blower fan 5 uses are gathered, and the electric current that collects passed in the control circuit unit 2, after the processing of control circuit unit 2, Control current is input to the drive end of field effect transistor G, to realize control to blower fan 5.
Amplifier IC among the figure 1, IC 2And IC 3Be three operational amplifiers in the LM324 integrated circuit, G is a field effect transistor.Signal gathering unit 3 mainly is made up of resistance, and wherein resistance R 1 is finished the detection to battery pack 4 output currents, and resistance R 2 is finished the detection of blower fan 5 being used electric current.Control circuit unit 2 is made up of operational amplifier and discrete component; Resistance R wherein 1For the sampling resistor of material battery pack 4 output currents, with amplifier IC 1Formation is to the detection of fuel cell output current; Amplifier IC 1Output deliver to amplifier IC 3Positive input terminal, if the output current of battery pack 4 increases like this, amplifier IC 3Output will be high, it drives field effect transistor G, thus control blower fan 5 rotating speeds improve; The current detecting of blower fan 5 is by resistance R 2Sampling and amplifier IC 2Finish, this must cause amplifier IC 2Output voltage raises, and this signal is added to amplifier IC 3Negative terminal, constitute negative feedback, thereby control amplifier IC 3The rising of output; The output current that forms each battery pack 4 thus changes and all causes the corresponding variation of blower fan 5 electric currents and be in new stable state.
When battery pack starts, how to guarantee that blower fan is in low cruise? when the fuel battery hydrogen supply, because non-loaded when starting, fuel battery voltage rises very fast, and the power consumption of this circuit seldom can enter operating state at once.R 3And R 4With fuel battery output voltage dividing potential drop, through R 9Be incorporated into IC 1Positive input terminal, make IC 1Certain output voltage is arranged, cause IC 3Big output voltage drives field effect transistor, causes the blower fan running; The blower fan current detecting is amplified feedback and is ended IC 3Negative terminal make it reach stable state; The output voltage of fuel cell stack height, power output size with and physical dimension select suitable direct current aerofoil fan or dc fan.
Fuel battery is ever-changing, and inconvenience is described in detail, but will abide by the principle: satisfy the requirement of fuel battery air requirements amount; Both are corresponding for physical dimension; Rated power when output, the output voltage of fuel battery greater than and near the rated voltage of aerofoil fan or dc fan.
R 1, IC 1Be used for detecting the output current of fuel battery, R 2, IC 2Be used for detecting the electric current of blower fan, so IC 1And IC 2The height of multiplication factor unimportant, be most important and make the unification of two signals.Make that the fuel battery output-current rating is I 1H, the rated current of blower fan is I 2H, R so 1I 1HK 1=R 2I 2HK 2Be important.R 1I 1HK 1Value is generally 5V.Because R 1Be the resistance of the sampling of fuel battery output current, the electric current of flowing through is bigger, so that the power consumption main point is got as far as possible is little, gets milliohm level or tens milliohms, and the sample resistance R of blower fan electric current 2Select tens of milliohm levels.Selected R 1And R 2Know that again the output-current rating of fuel battery and the rated current of blower fan then can calculate K 1And K 2Come.IC 3Multiplication factor influence the sensitivity of servo-actuated; K 3Big more clever more, K 3More little steady more.Too spirit is then unstable, too surely then ineffective; Empirical evidence 50＜K 3＜100 can.C 1And R 15Can not ignore, it influences the stability of servo-actuated; R 15C 1Value is more little, and the speed of blower fan electric current servo-actuated fuel cell output current is fast more; R 15C 1The too little meeting of value causes the bigger toning of blower fan electric current, even can cause vibration.R generally speaking 15Select 1K Ω, C 1Select 47 ц f.
Essential implementation of the present utility model: 1) fuel battery must select suitable air to supply with blower fan.2) output current signal of fuel battery and blower fan current signal are unified excursion, generally get 0-5V.3) fuel battery load variations, the servo-actuated of blower fan electric current changes; When with the moving R that reduces when too slow 15Or C 1When causing the blower fan current fluctuation, load variations strengthens R 15Or C 1Transfer R when 4) unloaded 4, make reliable startup of blower fan be in the minimum speed operation, full load is transferred R 11Make it blower fan and be in the nominal operation state, influential mutually between them, so will adjust secondary at least repeatedly.5), then press shown in the circuit diagram with field effect management and control system fan if fuel battery adopts direct current axle fan for air.Field effect transistor is chosen according to its operating voltage and electric current.Note the heat radiation of field effect transistor.If fuel battery adopts dc fan, and dc fan has controller to control rotating speed, then available IC 3Output replace the rotational speed setup signal of controller, this signal is generally 0-5V, can directly substitute.
As the 7.0KW fuel battery; Use 48V dc fan (blower fan has speed control).Fuel battery is a charge in batteries by DC/DC, and storage battery is motor and blower fan power supply, experimental data such as following table:
Battery voltage V 90.5 84.9 79.8 75.1 69.7 64.9 60.1
Battery pack current A 0 19.1 38.9 61.5 83.5 103 125.2
The given voltage IC of rotation speed of fan 3Output V 1.6 2.1 2.6 3.2 3.8 4.4 5.0
Blower fan electric current A 6.0 6.9 8.0 10.1 13.2 18.4 25.1
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to the technical solution of the utility model and inventive concept thereof, all should be encompassed within the protection range of the present utility model.

Claims (6)

1, a kind of self-starting, adaptation control circuit of fuel battery air supply is characterized in that comprising voltage stabilizing circuit unit (1), control circuit unit (2), signal gathering unit (3) and field effect transistor G;
Described voltage stabilizing circuit unit (1) is used for providing stable power for control circuit;
Described control circuit unit (2) is a comparison signal with the electric current of battery pack (4) and blower fan (5), adopts feedback ratio control mode to control the size of field effect transistor G conducting;
Described signal gathering unit (3) is used for gathering the electric current of battery pack (4) output and the electric current that blower fan (5) uses, and the electric current of gathering is passed in the control circuit unit (2);
During use I, II terminal are connect the positive and negative utmost point of load, by signal gathering unit (3) electric current of battery pack (4) output and the electric current of blower fan (5) use are gathered, and the electric current that collects passed in the control circuit unit (2), after the processing of control circuit unit (2), Control current is input to the drive end of field effect transistor G, to realize control to blower fan (5).
2, self-starting, the adaptation control circuit of fuel battery air supply according to claim 1 is characterized in that the voltage stabilizing chip in the described voltage stabilizing circuit unit (1) adopts 7812 chips.
3, self-starting, the adaptation control circuit of fuel battery air supply according to claim 1, it is characterized in that described signal gathering unit (3) mainly is made up of resistance, wherein resistance R 1 is finished the detection to battery pack (4) output current, and resistance R 2 is finished the detection of blower fan (5) being used electric current.
4, self-starting, the adaptation control circuit supplied with of fuel battery air according to claim 1 is characterized in that described control circuit unit (2) is made up of operational amplifier and discrete component; Resistance R wherein 1For the sampling resistor of material battery pack (4) output current, with amplifier IC 1Formation is to the detection of fuel cell output current; Amplifier IC 1Output deliver to amplifier IC 3Positive input terminal, like this battery pack (4) if output current increase amplifier IC 3Output will be high, it drives field effect transistor G, thus control blower fan (5) rotating speed improves; The current detecting of blower fan (5) is by resistance R 2Sampling and amplifier IC 2Finish, this must cause amplifier IC 2Output voltage raises, and this signal is added to amplifier IC 3Negative terminal, constitute negative feedback, thereby control amplifier IC 3The rising of output; The output current that forms each battery pack (4) thus changes and all causes the corresponding variation of blower fan (5) electric current and be in new stable state.
5, self-starting, the adaptation control circuit of fuel battery air supply according to claim 4 is characterized in that described IC 1, IC 2And IC 3Be three operational amplifiers in the LM324 integrated circuit.
6, self-starting, the adaptation control circuit of fuel battery air supply according to claim 1 is characterized in that described blower fan (5) is direct current aerofoil fan or DC fan.
CNU2007200152936U 2007-10-12 2007-10-12 Self-starting and self-adaptation control circuit for air supply of fuel battery set Expired - Lifetime CN201142343Y (en)

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Application Number Priority Date Filing Date Title
CNU2007200152936U CN201142343Y (en) 2007-10-12 2007-10-12 Self-starting and self-adaptation control circuit for air supply of fuel battery set

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Application Number Priority Date Filing Date Title
CNU2007200152936U CN201142343Y (en) 2007-10-12 2007-10-12 Self-starting and self-adaptation control circuit for air supply of fuel battery set

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102723787A (en) * 2012-05-22 2012-10-10 成都慧拓自动控制技术有限公司 Track distribution type electromagnetic induction charging device and charging method for underground tunnel
CN104716360A (en) * 2013-12-13 2015-06-17 中国科学院大连化学物理研究所 Direct starting method of fuel cell system
CN111207068A (en) * 2020-02-28 2020-05-29 广东福德电子有限公司 Air volume self-adaptive test load

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102723787A (en) * 2012-05-22 2012-10-10 成都慧拓自动控制技术有限公司 Track distribution type electromagnetic induction charging device and charging method for underground tunnel
CN104716360A (en) * 2013-12-13 2015-06-17 中国科学院大连化学物理研究所 Direct starting method of fuel cell system
CN104716360B (en) * 2013-12-13 2017-09-15 中国科学院大连化学物理研究所 A kind of fuel cell system directly initiates method
CN111207068A (en) * 2020-02-28 2020-05-29 广东福德电子有限公司 Air volume self-adaptive test load

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Granted publication date: 20081029