CN1289052A - Fuel cell unit voltage measuring method - Google Patents
Fuel cell unit voltage measuring method Download PDFInfo
- Publication number
- CN1289052A CN1289052A CN 99120198 CN99120198A CN1289052A CN 1289052 A CN1289052 A CN 1289052A CN 99120198 CN99120198 CN 99120198 CN 99120198 A CN99120198 A CN 99120198A CN 1289052 A CN1289052 A CN 1289052A
- Authority
- CN
- China
- Prior art keywords
- amplifier
- resistance
- group
- differential
- output terminal
- 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.)
- Granted
Links
Images
Abstract
The method for measuring voltage of single cell of fuel-cell is characterized by that several series-connected single-cells are grouped, two ends of every single-cell are connected with differential linear isolation amplifier, every group is independently power-supplied, and they are connected in the non-common earth mode, and their outputs are isolated and parallel common earth mode. The described differential linear isolation amplifier is formed from two-stage amplifier, capacitor C and resistors of R1-R7, its first amplifier is differential amplifier F1, its input end is connected with a group of single cells, second amplifier is linear isolation amplifier formed from negative feedback amplifier F2 and isolator F3, the secondary output end of photoelectric coupler V02 of isolator F3 is connected with independent power supply. Said invention possesses transmission measurement function of several series-connected single-cells, and possesses the advantages of common earth parallel output and anti-interference.
Description
The present invention relates to the voltage measurement technology, specifically a kind of unit voltage measuring method of fuel cell.
In the prior art, the fuel cell voltage measuring method has multiple: 1. adopt ledex to measure; 2. adopt relay to measure; 3. adopt isolated amplifier to measure, its principle of work all is by sample circuit and grounding monitor circuit, give automatic tester with the tested battery signal that obtains through analog to digital conversion circuit, by automatic tester tested value is gone the rounds to detect, its weak point is: patrol and examine only, can not detect simultaneously; Can not fine solution to the transmission measurement in the single pond of a plurality of serial connections and altogether and the line output problem; Tested battery signal needs through analog to digital conversion interference is arranged between circuit; The circuit complexity.
In order to solve above-mentioned deficiency, the invention provides a kind of can to the transmission measurement in the single pond of a plurality of serial connections and altogether and line output, anti-interference, not only can patrol and examine but also can examine entirely, the unit voltage measuring method of the simple fuel cell of circuit.
Technical scheme of the present invention is: with the grouping of the single pond of a plurality of serial connections, each Dan Chi two ends links to each other with differential linear isolation amplifier, and each group is powered separately, non-ly each other connects altogether, and it is output as isolation, parallel common-ground type; Wherein, described differential linear isolation amplifier is made up of two-stage amplifier, capacitor C and resistance R 1～R7, and wherein first order amplifier is differential amplifier F
1, its input end joins through resistance R 1, R2 and a single pond respectively, resistance R 4 one end ground connection, and the other end is connected to differential amplifier F
1In-phase end V
PPoint, resistance R 3 is connected on differential amplifier F
1Out-phase end V
sPoint and output terminal E
oThe point between; Second level amplifier is a linear isolation amplifier, by negative-feedback amplifier F
2With isolator F
3Form negative-feedback amplifier F
2In-phase end V
IPoint receives from differential amplifier F through resistance R 5
1Output signal, its out-phase end V
APut through resistance R 6 ground connection, and connect its output terminal, isolator F through capacitor C
3By photoelectrical coupler V
O1, V
O2Form two photoelectrical coupler V
O1, V
O2Elementary be serially connected with negative-feedback amplifier F
2Between the output terminal, photoelectrical coupler V
O1Secondary power supply and the negative-feedback amplifier F of being serially connected with
2The out-phase end, photoelectrical coupler V
O2Secondary one is connected to independent current source, and the other end is as output terminal, through resistance R 7 altogether;
The number of every group of differential linear isolation amplifier is corresponding with every group of single pond number, circuit input end not altogether, output terminal altogether, every group of single pond number is 2～24, is connected in series between each single pond in every group.
The present invention has following advantage:
1. the present invention changes into the problems of measurement in several groups of single ponds with the problems of measurement in a plurality of serial connection fuel cell lists pond, and each group is by the not independent electric power supply on ground power supply altogether.
2. the present invention adopts differential linear isolation amplifier method to measure the serial connection unit voltage, does not need analog to digital conversion, but directly with after all measured isolation altogether and line output.
3. the present invention is reliable and stable, and the linearity is good, and element is few, and isolation is good, and is noiseless between circuit.
4. circuit of the present invention is simple, can save many independent current sources or grounding monitor circuit.
5. all parallel the providing of output of the present invention so output can be patrolled and examined, also can be examined simultaneously entirely, and speed is fast.
Description of drawings:
Fig. 1 is a differential lines sexual isolation amplifier circuit schematic diagram.
Below in conjunction with accompanying drawing the present invention is described in further detail.
As shown in Figure 1, with the single pond grouping of a plurality of serial connections, each Dan Chi two ends links to each other with differential linear isolation amplifier, the power supply separately of each group, non-ly each other connect altogether, it is output as isolation, parallel common-ground type: wherein, described differential linear isolation amplifier is made up of two-stage amplifier, capacitor C and resistance R 1～R7, and wherein first order amplifier is differential amplifier F
1, its input end joins through resistance R 1, R2 and a single pond respectively, resistance R 4 one end ground connection, and the other end is connected to differential amplifier F
1In-phase end V
pPoint, resistance R 3 is connected on differential amplifier F
1Out-phase end V
sPoint and output terminal E
oThe point between; Second level amplifier is a linear isolation amplifier, by negative-feedback amplifier F
2With isolator F
3Form negative-feedback amplifier F
2In-phase end V
IPoint receives from differential amplifier F through resistance R 5
1Output signal, its out-phase end V
APut through resistance R 6 ground connection, and connect its output terminal, isolator F through capacitor C
sBy photoelectrical coupler V
O1, V
O2Form two photoelectrical coupler V
O1, V
O2Elementary be serially connected with negative-feedback amplifier F
2Between the output terminal, photoelectrical coupler V
O1Secondary power supply and the negative-feedback amplifier F of being serially connected with
2The out-phase end, photoelectrical coupler V
O2Secondary one is connected to independent current source, and the other end is as output terminal, through resistance R 7 altogether;
The number of every group of differential linear isolation amplifier is corresponding with every group of single pond number, circuit input end not altogether, output terminal altogether, every group of single pond number is 2～24, is connected in series between each single pond in every group.
By differential amplifier F
1Can discharge relational expression:
(V
2-V
∑)/R
1=(V
Σ-E
o)/R
2 (1)
V
∑=V
P=R
4V
1/(R
3+R
4) (2)
From (1) Shi Kede:
E
o=(R
1+R
2)V
∑/R
1-R
2V
2/R
1 (3)
(2) formula substitution (3) formula is got
E
o=R
4(R
1+R
2)V
1/(R
1(R
3+R
4))-R
2V
2/R
1?(4)
If make R
1=R
3, R
2=R
4, R
2=R
1, then:
E
o=V
1-V
2=E
1
E
oDeliver to the feedback amplifier F of linear isolation amplifier
2In-phase end.
Photoelectrical coupler V
O1And V
O2Elementary serial connection, public same exciting current I
1, photoelectrical coupler V
O1With resistance R 6 imitation output forms, form negative-feedback circuit.
If photoelectrical coupler V
O1And V
O2Electric current nonlinear transport function be respectively g
1(I
1) and g
2(I
1), and
I
2=g
1(I
1)----------(5)
I
3=g
2(I
1)----------(6)
Negative-feedback amplifier F
2Be the single supply operational amplifier, the notion according to ideal operational amplificr has following relationship:
E
o=U
I=U
A=I
2R
6
U
o=I
3R
7
Then described negative-feedback amplifier F
2Voltage gain is G=U
o/ E
o=U
o/ E
1=I
3R
7/ I
2R
6
Formula substitution following formula in (5) (6) is got:
G=R
7g
2(I
1)/(R
6g
1(I
1))=Kg
2(I
1)/g
1(I
1)
Photoelectrical coupler V of the present invention
O1And V
O2Be the two photoelectrical couplers of the same non-Darlington of sealing dress up for safekeeping, can think so they the temperature characterisitic of transition function and electric current non-linear be on all four, i.e. g
1(I
1)=g
2(I
1), G=K then.The voltage transmission ratio that constant K is this isolated amplifier utilizes two photoelectrical coupler V
O1, V
O2The symmetry of current delivery function, export for one, one is fed back, can compensate the non-linear of them cleverly, again because the coupling of light is only arranged between the input and output of circuit, and do not have the contact of electricity, so can cut off common mode interference well, this is with regard to the transmission measurement that solved the single pond of a plurality of serial connections preferably and the problem of line output also altogether.
Embodiment 1
18 single ponds of serial connection are divided into 3 groups, 3 groups of differential linear isolation amplifiers are adopted in every group of 6 single ponds, every group of 6 differential linear isolation amplifiers, its input end joins by 6 Dan Chi two ends that resistance R 1, R2 are connected in series with a group respectively, at each differential linear isolation amplifier output place V
oPoint is surveyed output valve.Input and output value and difference see Table 1.
Embodiment 2
16 serial connection unit voltages are divided into 2 groups, 2 groups of differential linear isolation amplifiers are adopted in every group of 8 single ponds, every group of 8 differential linear isolation amplifiers, its input end joins by 8 Dan Chi two ends that resistance R 1, R2 are connected in series with a group respectively, at each differential linear isolation amplifier output place V
oPoint is surveyed output valve.Input and output value and difference see Table 2.
Table 1 18 unit voltage inputs, output valve and differences
Table 2 16 unit voltage inputs, output valve and differences
Embodiment 3
30 serial connection unit voltages are divided into 3 groups, first group of 10 single pond, second group of 8 single pond, the 3rd group of 12 single ponds, adopt 3 groups of differential linear isolation amplifiers, its input end is connected in series single pond with three groups respectively by resistance R 1, R2 and joins, at each differential linear isolation amplifier output place V
oPoint is surveyed output valve.Input and output value and difference see Table 3.
Table 3 30 unit voltage inputs, output valve and differences
Claims (2)
1. the unit voltage measuring method of a fuel cell is characterized in that: with the single pond grouping of a plurality of serial connections, each Dan Chi two ends links to each other with differential linear isolation amplifier, and each group is powered separately, non-ly each other connects altogether, and it is output as isolation, parallel common-ground type; Wherein, described differential linear isolation amplifier is made up of two-stage amplifier, capacitor C and resistance R 1～R7, and wherein first order amplifier is differential amplifier F
1, its input end joins through resistance R 1, R2 and a single pond respectively, resistance R 4 one end ground connection, and the other end is connected to differential amplifier F
1In-phase end V
pPoint, resistance R 3 is connected on differential amplifier F
1Out-phase end V
sPoint and output terminal E
oThe point between; Second level amplifier is a linear isolation amplifier, by negative-feedback amplifier F
2With isolator F
3Form negative-feedback amplifier F
2In-phase end V
IPoint receives from differential amplifier F through resistance R 5
1Output signal, its out-phase end V
APut through resistance R 6 ground connection, and connect its output terminal, isolator F through capacitor C
3By photoelectrical coupler V
O1, V
O2Form two photoelectrical coupler V
O1, V
O2Elementary be serially connected with negative-feedback amplifier F
2Between the output terminal, photoelectrical coupler V
O1Secondary power supply and the negative-feedback amplifier F of being serially connected with
2The out-phase end, photoelectrical coupler V
O2Secondary one is connected to independent current source, and the other end is as output terminal, through resistance R 7 altogether.
2. according to the unit voltage measuring method of the described fuel cell of claim 1, it is characterized in that: the number of every group of differential linear isolation amplifier is corresponding with every group of single pond number, circuit input end is not altogether, output terminal altogether, every group of single pond number is 2～24, is connected in series between each single pond in every group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991201981A CN1136461C (en) | 1999-09-22 | 1999-09-22 | Fuel cell unit voltage measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991201981A CN1136461C (en) | 1999-09-22 | 1999-09-22 | Fuel cell unit voltage measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1289052A true CN1289052A (en) | 2001-03-28 |
| CN1136461C CN1136461C (en) | 2004-01-28 |
Family
ID=5281434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991201981A Expired - Fee Related CN1136461C (en) | 1999-09-22 | 1999-09-22 | Fuel cell unit voltage measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1136461C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463435C (en) * | 2005-02-04 | 2009-02-18 | 美国凹凸微系有限公司 | Non-common ground series bus physical layer implementation |
| 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 |
| CN101738523B (en) * | 2008-11-14 | 2013-07-24 | 统达能源股份有限公司 | Device for detecting voltage of serially-connected cells |
| CN104049125A (en) * | 2013-03-12 | 2014-09-17 | 浙江海洋学院 | Linear voltage detection method based on photoelectric couplers |
| CN105572453A (en) * | 2016-01-08 | 2016-05-11 | 珠海许继电气有限公司 | Voltage acquisition electronic sensor apparatus |
-
1999
- 1999-09-22 CN CNB991201981A patent/CN1136461C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463435C (en) * | 2005-02-04 | 2009-02-18 | 美国凹凸微系有限公司 | Non-common ground series bus physical layer implementation |
| 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 |
| CN101738523B (en) * | 2008-11-14 | 2013-07-24 | 统达能源股份有限公司 | Device for detecting voltage of serially-connected cells |
| CN104049125A (en) * | 2013-03-12 | 2014-09-17 | 浙江海洋学院 | Linear voltage detection method based on photoelectric couplers |
| CN105572453A (en) * | 2016-01-08 | 2016-05-11 | 珠海许继电气有限公司 | Voltage acquisition electronic sensor apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1136461C (en) | 2004-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2837857Y (en) | Transformer winding tester | |
| CN1136461C (en) | Fuel cell unit voltage measuring method | |
| CN1763551A (en) | Method for measuring internal resistance of storage battery | |
| CA2064031A1 (en) | Method and Apparatus for Monitoring Fuel Cell Performance | |
| CN1080477C (en) | Circuit for detecting overcharging and overdischarging | |
| WO2002097460A3 (en) | Fuel cell voltage monitoring | |
| CN101556295A (en) | Voltage linear isolation detection method and circuit | |
| CN101324655A (en) | Low cost batteries monomer battery voltage measuring circuit | |
| CN1351261A (en) | Voltage measuring device | |
| CN1241259A (en) | Instrument for measuring voltages of cells | |
| CN201830210U (en) | Linear isolating and amplifying device for analog signals | |
| CN202281798U (en) | Voltage sampling circuit for battery | |
| CN201035102Y (en) | Device for testing op-amp offset voltage category | |
| CN114039602A (en) | High-precision common mode conversion circuit supporting high-voltage input | |
| CA2405324A1 (en) | Fuel cell stacking body | |
| CN101685140A (en) | Accumulator routing inspection circuit | |
| CN213364991U (en) | Battery internal resistance tester | |
| CN2819232Y (en) | Plumbous acid accumulator capacity sensor for vehicle | |
| CN109283470B (en) | Single voltage monitoring circuit of power battery pack | |
| CN103323732B (en) | Photovoltaic inverter multi-channel input reverse connection detection circuit with self-diagnostic function | |
| CN115902409A (en) | Low common mode voltage error measuring circuit for measuring impedance spectrum | |
| CN210327087U (en) | Constant-resistance charging and discharging circuit | |
| CN1056712C (en) | Driver of piezoelectric ceramic performer | |
| CN204855622U (en) | A direct transform formula is at line voltage monitoring devices for storage battery | |
| CN210864018U (en) | Voltage-dividing battery detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: DALIAN XINYUAN POWER CO., LTD. Free format text: FORMER OWNER: DALIAN INST OF CHEMICOPHYSICS, CHINESE ACADEMY OF SCIENCES Effective date: 20020426 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20020426 Address after: 116025 Liaoning city of Dalian province high tech Zone Qixianling Torch Road No. 1 Applicant after: Dalian Sunrise Power Co.,Ltd. Address before: 116023 No. 457, Zhongshan Road, Liaoning, Dalian Applicant before: Dalian Institute of Chemical Physics, Chinese Academy of Sciences |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI XINYUAN DYNAMICS CO., LTD. Free format text: FORMER OWNER: XINYUAN POWER CO., LTD. Effective date: 20070817 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: XINYUAN POWER CO., LTD. Free format text: FORMER NAME OR ADDRESS: DALIAN XINYUAN POWER CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 116025 Liaoning city of Dalian province high tech Zone Qixianling Torch Road No. 1 Patentee after: Sunrise Power Co.,Ltd. Address before: 116025 Liaoning city of Dalian province high tech Zone Qixianling Torch Road No. 1 Patentee before: Dalian Sunrise Power Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20070817 Address after: 201804 Shanghai Jiading District Huangdu Town New Huang Road No. 4 Patentee after: SHANGHAI SUNRISE POWER Co.,Ltd. Address before: 116025 Liaoning city of Dalian province high tech Zone Qixianling Torch Road No. 1 Patentee before: Sunrise Power Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040128 Termination date: 20180922 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |