CN103630861B - The caliberating device of fuel battery internal partition performance detection PCB and method - Google Patents
The caliberating device of fuel battery internal partition performance detection PCB and method Download PDFInfo
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- CN103630861B CN103630861B CN201210313406.6A CN201210313406A CN103630861B CN 103630861 B CN103630861 B CN 103630861B CN 201210313406 A CN201210313406 A CN 201210313406A CN 103630861 B CN103630861 B CN 103630861B
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Abstract
The present invention relates to a kind of caliberating device and method of fuel battery internal partition performance detection PCB, this caliberating device is used for demarcating the subregion performance detection PCB of fuel battery inside performance real-time detecting system, comprise stabilized voltage supply and Calibration Circuit plate, stabilized voltage supply connects Calibration Circuit plate and subregion performance detection PCB respectively, the demarcation resistance identical with embedded resistor quantity is provided with in Calibration Circuit plate, the demarcation resistance of Calibration Circuit plate and the embedded resistor of subregion performance detection PCB connect one to one, the method is by detecting the current density of each sense partitions, thus the embedded resistor of subregion performance detection PCB is demarcated one by one.Compared with prior art, the present invention to the subregion performance detection PCB Accurate Calibration of fuel battery inside performance real-time detecting system, and can carry out accurate error diagnosis.
Description
Technical field
The present invention relates to a kind of caliberating device and method of fuel cell checkout equipment, especially relate to a kind of caliberating device and method of fuel battery internal partition performance detection PCB.
Background technology
Proton Exchange Membrane Fuel Cells (PEMFC) is because having the good characteristics such as high power density, environmental friendliness, startup be rapid, be suitable for being used as removable power source, be regarded as the best replacer of internal combustion engine and be subject to the very big attention of national governments and automaker.But the performance and the reliability that improve fuel cell are still a great problem.Wherein the electric current distribution of fuel cell can reflect the response situation of fuel battery inside.Therefore, adopt fuel battery internal partition performance detection PCB to detect the distribution of fuel cell internal current density, temperature, the electrochemical reaction situation of fuel battery inside can be understood.
Subregion performance detection PCB is divided into several regions, wherein containing embedded resistor.Because the measurement of current density and temperature is based on Ohm law, therefore the precision of embedded resistor height directly affects the accuracy of subregion Performance Detection, be thus the important step improving fuel cell each subregion Performance Detection accuracy to the demarcation of embedded resistor.
Due to embedded resistor be clamped in pcb board two-layer between, directly cannot measure the resistance of embedded resistor with instrument.The method of current report adopts mostly draws sample line at the two ends of the embedded resistor of subregion performance detection PCB, directly instrument is connected on sample line two ends, to demarcate the resistance of embedded resistor.The resistance of embedded resistor is very little, only has a few milliohm, and the accuracy of detection of general instrument is difficult to reach requirement.Simultaneously, it is resistance sum in embedded resistor and sample line that profit measures the resistance obtained in this way, cause calibration result comparatively larger than actual value deviation ratio, so cause the testing result of fuel cell current density and the temperature adopting the measurement of subregion performance detection PCB to obtain and actual value deviation larger.
Summary of the invention
Object of the present invention is exactly provide a kind of can carry out Accurate Calibration to the subregion performance detection PCB of fuel battery inside performance real-time detecting system to overcome defect that above-mentioned prior art exists, and the apparatus and method of Accurate Diagnosis mistake.
Object of the present invention can be achieved through the following technical solutions:
A kind of caliberating device of fuel battery internal partition performance detection PCB, this caliberating device is used for demarcating the subregion performance detection PCB of fuel battery inside performance real-time detecting system, described subregion performance detection PCB comprises multiple sense partitions, embedded resistor is equipped with in each sense partitions, described caliberating device comprises stabilized voltage supply and Calibration Circuit plate, described stabilized voltage supply the two poles of the earth connect Calibration Circuit plate and subregion performance detection PCB respectively, the demarcation resistance identical with embedded resistor quantity is provided with in described Calibration Circuit plate, the demarcation resistance of Calibration Circuit plate and the embedded resistor of subregion performance detection PCB connect one to one.
Described Calibration Circuit plate is provided with terminals and winding displacement interface, and one end of described demarcation resistance connects stabilized voltage supply by terminals, and the other end is connected one to one by the embedded resistor of the winding displacement of being drawn by winding displacement interface and subregion performance detection PCB.
Described stabilized voltage supply is the adjustable stabilized voltage supply of output voltage.
Apply a scaling method for the fuel battery internal partition performance detection PCB of said apparatus, comprise the following steps:
1) starting fluid inside battery performance real-time detecting system, the parameter preset of setting subregion performance detection PCB;
2) regulate the output voltage of stabilized voltage supply, provide constant voltage to Calibration Circuit plate and subregion performance pcb board;
3) current density of each sense partitions is detected by fuel battery inside performance real-time detecting system;
4) repeat step 2) ~ step 3) and take multiple measurements after, perform step 5);
5) current density is inputted the computing machine of fuel battery inside performance real-time detecting system, by calculating the resistance of embedded resistor in each sense partitions of subregion performance pcb board;
6) according to step 5) resistance of embedded resistor that obtains demarcates one by one, searches abnormal data for comparative analysis.
Step 1) in parameter preset comprise and demarcate temperature, the initial resistance of embedded resistor and temperature coefficient.
Compared with prior art, the present invention has the following advantages:
1) the present invention directly adopts the result measured by fuel battery inside performance real-time detecting system to calculate, and eliminate the interference of the conductor resistances such as sample line, and consider the impact of environment temperature on embedded resistor resistance, calibration result is accurate.
2) due to the voltage stabilization that stabilized voltage supply exports, the precision of fuel battery inside performance real-time detecting system is high, therefore calibration result is accurate, and precision can reach 0.01 milliohm.
3) owing to simulating its course of work in the process of demarcating subregion performance detection PCB, the resistance namely to each subregion is powered, and utilizes sample line to measure the pressure drop at embedded resistor two ends, then by calculating the current density size of each subregion.Therefore can carry out error diagnosis to it, judge whether subregion performance detection PCB has manufacturing defect and whether can normally work, for the development of subregion performance detection PCB and optimization provide certain experimental basis.
4) pressure drop that can bear due to each subregion of subregion performance detection PCB is only several millivolts, and stabilized voltage supply is generally difficult to provide so little voltage, therefore by the embedded resistor under each for subregion performance detection PCB subregion and the resistant series on Calibration Circuit plate, realize dividing potential drop, therefore adopt common stabilized voltage supply just can demarcate it.
5) utilize existing fuel battery inside performance real-time detecting system, reduce instrument and equipment as far as possible, and the processing of Calibration Circuit plate is simple, calibration process is convenient to operation.
6) all embedded resistors of disposable demarcation can being realized, eliminating the error produced because repeatedly demarcating.
Accompanying drawing explanation
Fig. 1 be apparatus of the present invention structured flowchart;
Fig. 2 is the circuit theory diagrams of apparatus of the present invention;
Fig. 3 is the process flow diagram of the inventive method;
Fig. 4 carries out first time timing signal for utilizing the subregion performance detection PCB of this method to one piece of 7 × 7 totally 49 sense partitions, by fuel battery inside performance real-time detecting system, and the current density size of each sense partitions obtained;
Fig. 5 utilizes this method to carry out the result of first time demarcation to same subregion performance detection PCB;
Fig. 6 utilizes this method to carry out the result of second time demarcation to same subregion performance detection PCB;
Fig. 7 utilizes this method to the independent calibration result of embedded resistor of same subregion performance detection PCB A3 sense partitions.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As depicted in figs. 1 and 2, a kind of caliberating device of fuel battery internal partition performance detection PCB, this caliberating device is used for demarcating the subregion performance detection PCB of fuel battery inside performance real-time detecting system.Subregion performance detection PCB comprises multiple sense partitions, is equipped with embedded resistor 5 in each sense partitions, and caliberating device comprises stabilized voltage supply 1 and Calibration Circuit plate, and Calibration Circuit plate is provided with terminals 2, winding displacement interface 4 and demarcates resistance 3.The quantity of demarcating resistance is identical with the quantity of embedded resistor 5, the winding displacement 4 that one end is drawn by winding displacement interface connects one to one with embedded resistor 5, the other end then connects stabilized voltage supply 1 by terminals 2, stabilized voltage supply 1 is connected with the embedded resistor 5 of subregion performance detection PCB by wire 6, forms loop.This stabilized voltage supply is the adjustable stabilized voltage supply of output voltage, by regulator output voltage, takes multiple measurements.
Apply a scaling method for the fuel battery internal partition performance detection PCB of said apparatus, comprise the following steps:
1) starting fluid inside battery performance real-time detecting system, the parameter preset of setting subregion performance detection PCB.The environment temperature adopting thermometer to record environment residing for timing signal subregion performance detection PCB is 27 DEG C, and according to design resistance 9 milliohm of embedded resistor and the temperature characteristic of material copper, arranges the parameter preset of subregion performance detection PCB: demarcate temperature T
0=27 DEG C, the initial resistance R of embedded resistor
0=9m Ω and temperature coefficient ε=3.9 × 10
-3dEG C
-1;
2) regulate the output voltage U=0.666V of stabilized voltage supply, provide constant voltage to Calibration Circuit plate and subregion performance detection PCB;
3) detected the current density of each sense partitions by fuel battery inside performance real-time detecting system, the value of each sense partitions as shown in Figure 4;
4) reset the output voltage of stabilized voltage supply, as U=0.891V etc., then after repetitive measurement current density, perform step 5):
5) current density is inputted the computing machine of fuel battery inside performance real-time detecting system, by calculating the resistance of embedded resistor in each sense partitions of subregion performance pcb board; The computing formula of resistance is:
The computing formula of the embedded resistor resistance under each subregion is:
In formula: R
bthe resistance of the demarcation resistance of-Calibration Circuit plate, unit: m Ω;
The current density of the single sense partitions of i-, unit: mA/cm
2;
The area of the single sense partitions of A-, unit: cm
2;
The temperature of the single sense partitions that T-fuel battery inside performance real-time detecting system records, unit: DEG C;
T
0-demarcate temperature, unit: DEG C;
The temperature coefficient of ε-embedded resistor, unit: DEG C
-1;
R
0the initial resistance of-default embedded resistor, unit: m Ω;
The output voltage of U-source of stable pressure, unit: V;
6) according to step 5) resistance of embedded resistor that obtains demarcates one by one, for comparing analysis with nominal data before, and searches abnormal data.
Fig. 5 is the result utilizing this method to demarcate the embedded resistor under each subregion of subregion performance detection PCB of 7 × 7 totally 49 sense partitions, can carry out diagnostic analysis by this calibration result to subregion performance detection PCB.From calibration result, the resistance of the embedded resistor under most subregion is about 9.15 milliohms, design resistance due to embedded resistor is 9 milliohms, and in conjunction with the mismachining tolerance of embedded resistor, it is normal with the wire arrangements of its correspondence that analysis can obtain the embedded resistor under most subregion.But can be found by data analysis, the embedded resistor resistance of A1 sense partitions and A2 sense partitions exists abnormal.As shown in Figure 6, second time timing signal is being carried out to same subregion performance detection PCB, finding that A1, A2 sense partitions does not detect electric current, therefore can judge that the winding displacement interface of A1 and A2 sense partitions exists the problem of loose contact.
Fig. 7 utilizes the pcb board A3 sense partitions of this method to same sense partitions performance to carry out the result of demarcating separately.Because A3 sense partitions and A4 sense partitions have data to occur simultaneously, and under normal circumstances the electric current of each sense partitions be mutual independent, be independent of each other.Therefore incorrect link can be there is in A3 sense partitions and A4 sense partitions in the pcb board of this sense partitions performance of preliminary judgement.
Claims (5)
1. the caliberating device of a fuel battery internal partition performance detection PCB, this caliberating device is used for demarcating the subregion performance detection PCB of fuel battery inside performance real-time detecting system, described subregion performance detection PCB comprises multiple sense partitions, embedded resistor is equipped with in each sense partitions, it is characterized in that, described caliberating device comprises stabilized voltage supply and Calibration Circuit plate, the two poles of the earth of described stabilized voltage supply connect Calibration Circuit plate and subregion performance detection PCB respectively, the demarcation resistance identical with embedded resistor quantity is provided with in described Calibration Circuit plate, the demarcation resistance of Calibration Circuit plate and the embedded resistor of subregion performance detection PCB connect one to one.
2. the caliberating device of fuel battery internal partition performance detection PCB according to claim 1, it is characterized in that, described Calibration Circuit plate is provided with terminals and winding displacement interface, one end of described demarcation resistance connects stabilized voltage supply by terminals, and the other end is connected one to one by the embedded resistor of the winding displacement of being drawn by winding displacement interface and subregion performance detection PCB.
3. the caliberating device of fuel battery internal partition performance detection PCB according to claim 1, is characterized in that, described stabilized voltage supply is the adjustable stabilized voltage supply of output voltage.
4. application rights requires a scaling method for the fuel battery internal partition performance detection PCB of device described in 1, it is characterized in that, comprises the following steps:
1) starting fluid inside battery performance real-time detecting system, the parameter preset of setting subregion performance detection PCB;
2) regulate the output voltage of stabilized voltage supply, provide constant voltage to Calibration Circuit plate and subregion performance pcb board;
3) current density of each sense partitions is detected by fuel battery inside performance real-time detecting system;
4) repeat step 2) ~ step 3) and take multiple measurements after, perform step 5);
5) current density is inputted the computing machine of fuel battery inside performance real-time detecting system, by calculating the resistance of embedded resistor in each sense partitions of subregion performance pcb board;
6) according to step 5) resistance of embedded resistor that obtains demarcates one by one, searches abnormal data for comparative analysis;
The computing formula of the embedded resistor resistance under each subregion is:
In formula: R
bthe resistance of the demarcation resistance of-Calibration Circuit plate, unit: m Ω;
The current density of i-single sense partitions, unit: mA/cm
2;
The area of A-single sense partitions, unit: cm
2;
The temperature of the single sense partitions that T-fuel battery inside performance real-time detecting system records, unit: DEG C;
T
0-demarcate temperature, unit: DEG C;
The temperature coefficient of ε-embedded resistor, unit: DEG C
?1;
R
0the initial resistance of-default embedded resistor, unit: m Ω;
The output voltage of U-source of stable pressure, unit: V.
5. the scaling method of fuel battery internal partition performance detection PCB according to claim 4, is characterized in that, step 1) in parameter preset comprise and demarcate temperature, the initial resistance of embedded resistor and temperature coefficient.
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|---|---|---|---|
| CN201210313406.6A CN103630861B (en) | 2012-08-29 | 2012-08-29 | The caliberating device of fuel battery internal partition performance detection PCB and method |
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|---|---|---|---|
| CN201210313406.6A CN103630861B (en) | 2012-08-29 | 2012-08-29 | The caliberating device of fuel battery internal partition performance detection PCB and method |
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| CN103630861A CN103630861A (en) | 2014-03-12 |
| CN103630861B true CN103630861B (en) | 2016-04-20 |
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| CN102544551A (en) * | 2010-12-09 | 2012-07-04 | 横河电机株式会社 | Fuel cell evaluator and fuel cell evaluation method |
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2012
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| CN1930718A (en) * | 2004-03-12 | 2007-03-14 | 松下电器产业株式会社 | Fuel cell system failure diagnosis method, failure diagnosis device using same, and fuel cell system |
| CN2874514Y (en) * | 2006-03-21 | 2007-02-28 | 上海仪器仪表研究所 | Full automatic resistance corrector |
| CN101221223A (en) * | 2007-12-27 | 2008-07-16 | 武汉理工大学 | Single slice battery essential resistance and voltage on-line testing system for fuel cell pile |
| CN102544551A (en) * | 2010-12-09 | 2012-07-04 | 横河电机株式会社 | Fuel cell evaluator and fuel cell evaluation method |
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