CN200986674Y - Voltage stabilizer for fuel cell - Google Patents
Voltage stabilizer for fuel cell Download PDFInfo
- Publication number
- CN200986674Y CN200986674Y CNU200620116150XU CN200620116150U CN200986674Y CN 200986674 Y CN200986674 Y CN 200986674Y CN U200620116150X U CNU200620116150X U CN U200620116150XU CN 200620116150 U CN200620116150 U CN 200620116150U CN 200986674 Y CN200986674 Y CN 200986674Y
- Authority
- CN
- China
- Prior art keywords
- voltage
- fuel cell
- circuit
- load
- stable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A device uses an electronic circuit to stabilize a voltage. The voltage-stabilizing device can stabilize the voltage of a fuel battery in the case of loading. The voltage at the loading end can be stably maintained. The voltage-stabilizing device comprises a boosting circuit and a buck circuit, i.e. the stabilizing of the voltage is realized by an electronic circuit. Meanwhile, the output voltage of the fuel battery is maintained, so a stable voltage can be supplied at loading.
Description
Technical field
This creation is to utilize electronic circuit to realize the device of burning voltage, and wherein this electronic circuit has the effect of boosting with step-down, has the voltage that the steady fuel battery is output in load, makes it obtain deciding voltage in load.
Background technology
In known technology, operating characteristic by fuel cell (FUEL CELL) is learnt, when load end is little load, the voltage that fuel cell output is less, otherwise, when being heavy load, export bigger voltage, when wishing to get higher or lower burning voltage, need provide the supply voltage of accurate control.When for example load was mobile phone, this stable-pressure device must drop to the 3.6V voltage of battery logic and the desired 3.3V of I/O assembly, or desired 1.8V of processor core or 1.2V.Under the other situation, stable-pressure device voltage must be risen to 4.5V backlight to drive, rise to 5V driving USB interface, to rise to 9V with the driven CCD camera model, or moment rises to the desired 4kV high pressure of xenon flash lamp.
Therefore this creation is because the shortcoming of above-mentioned known technology, thereby urgently thinks invention, with a circuit arrangement, so that a fuel cell buck to be provided, and provides the output of a burning voltage, compares the advantage that circuit is effectively worked with known technology before.
Novel content
This creation is a kind of stable-pressure device that is used for fuel cell, the main electronic circuit that uses of this device is realized, and the stable voltage that is output in load, this stable-pressure device is made of booster circuit (BOOST) and reduction voltage circuit (LDO), and this installs between fuel cell and load end.Even will export high voltage, can increase the fuel cell stack number and booster tension, yet this can make cost increase and can reduce the fiduciary level of fuel cell.And to the power supply (as 3.3V) of the special requirement of general high-tech electronic product, the output voltage of fuel cell also is not easy to reach the voltage of this specification, therefore the output of fuel cell changes along with load easily, therefore needs a stable voltage source when being applied to load end.Basic boost converter, basic circuit also is made up of metal oxide semiconductor switch (FET) Q, inductance L, diode D and capacitor C, same, alternately switch by metal oxide semiconductor switch and diode D, just can obtain the voltage output higher than input, reached the purpose of boosting, its input voltage to the relational expression of output voltage is:
Vo/Vin＝1/(1-D)D1
Again, D is less than 1, and output can be than input voltage height.
In addition, if will export lower voltage, can adopt the device of low pressure difference linear voltage regulator (LDO) to reach the purpose of step-down.Compared to three terminal regulator commonly used have higher performance, the PCB area takies the advantage lower with power consumption, the principle of work of low pressure difference linear voltage regulator is to adjust output current by negative feedback output voltage is remained unchanged again, and is that LDO is the DC/DC converter of a voltage-dropping type.
By the form of both parallel connections, between fuel cell and load end, can select also to boost or the mode of step-down, promptly select BOOST or LDO.And when selecting the LDO form, can initiatively close BOOST, stable more interference-free to guarantee output voltage more.
Description of drawings
Fig. 1 is a stabilizing voltage of fuel cell circuit working calcspar.
Fig. 2 is the circuit diagram of booster circuit.
Symbol description
230 metal oxide semiconductor switch, 210 inductors
220 active diodes, 240 capacitors
110 fuel cell main bodies, 120 booster circuits
140 loads of 130 reduction voltage circuits
Embodiment
Show with reference to figure 1, it is to be stabilizing voltage of fuel cell circuit working square Figure 100, it is fuel cell main body 110, booster circuit 120, reduction voltage circuit 130 and load 140, this work calcspar shows that this stable-pressure device 150 is to borrow between fuel cell main body 110 and load 140, and these stable-pressure device 150 the insides comprise booster circuit 120 and reduction voltage circuit 130, in stable-pressure device 150, take form in parallel, have common input and input.
Show with reference to figure 2, it is the circuit diagram 200 for booster circuit, its bag metal oxide semiconductor switch 230, inductor 210, active diode 220 and capacitor 240 are formed, alternately cut by metal oxide semiconductor switch 230 and diode 220 initiatively, according to the relational expression of input voltage to output voltage:
Vo/Vin＝1/(1-D)D1
Vo wherein: output voltage, Vin: output voltage, D: diode initiatively.
Can learn via following formula, along with the change of active diode 220, its output voltage also with change, can obtain reaching the purpose of boosting than the output of the high voltage of input.It is characterized in that this booster circuit, replace general diode, stable boosted voltages can more effectively be provided with a metal-oxide semiconductor (MOS).
Though this creation discloses as above with specific embodiment; right its disclosed specific embodiment is not in order to limit this creation; anyly be familiar with this technician; without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations; its change done and retouching all should belong to the category of this creation, and the protection domain of this creation is worked as according to being as the criterion that claim defined.
Claims (5)
1. a stable-pressure device that is used for fuel cell is characterized in that, comprising:
One booster circuit is between fuel cell and load end; And
One reduction voltage circuit is between fuel cell and load;
Wherein, booster circuit and reduction voltage circuit are connected between fuel cell and the load in parallel.
2. device as claimed in claim 1 is characterized in that booster circuit can be the form of BOOST.
3. device as claimed in claim 1 is characterized in that reduction voltage circuit can be the form of LDO.
4. device as claimed in claim 1 is characterized in that, this booster circuit also comprises: an inductor; One electronic switch, and an active diode; Wherein, initiatively diode also can be field-effect transistor or transistor replaces.
5. device as claimed in claim 4 is characterized in that electronic switch can be field-effect transistor or transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620116150XU CN200986674Y (en) | 2006-05-18 | 2006-05-18 | Voltage stabilizer for fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620116150XU CN200986674Y (en) | 2006-05-18 | 2006-05-18 | Voltage stabilizer for fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200986674Y true CN200986674Y (en) | 2007-12-05 |
Family
ID=38916133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200620116150XU Expired - Fee Related CN200986674Y (en) | 2006-05-18 | 2006-05-18 | Voltage stabilizer for fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200986674Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861514A (en) * | 2018-11-13 | 2019-06-07 | 广州金升阳科技有限公司 | A kind of starting control method and circuit |
-
2006
- 2006-05-18 CN CNU200620116150XU patent/CN200986674Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861514A (en) * | 2018-11-13 | 2019-06-07 | 广州金升阳科技有限公司 | A kind of starting control method and circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |