Super-capacitor single voltage sampling measurement circuit
A technology of super capacitor and single voltage, applied in the measurement of electrical variables, measurement of current/voltage, measurement devices, etc., can solve the problems of low accuracy, short circuit life, high cost, and achieve the effect of high-precision measurement
Active Publication Date: 2013-06-19
TIG TECH CO LTD
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Problems solved by technology
[0002] There are various existing voltage sampling circuits for supercapacitors, including common-mode measurement methods, relay switching extraction voltage methods, V / F conversion non-contact sampling extraction voltage methods, and floating ground technology measurement methods, but the above methods all have accuracy. Low, short circuit life, high cost and many other obvious disadvantages
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[0015] The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.
[0016] Such as figure 1 Shown is the circuit diagram of the supercapacitor monomer voltage sampling and measuring circuit of this embodiment, UC n-1 、UC n 、UC n+1 is a supercapacitor monomer, where UC n The voltage is the voltage to be measured, and the sampling measurement circuit of the present invention includes a differential sampling circuit composed of a positive polarity voltage divider sampling circuit and a negative polarity sampling voltage divider circuit, a proportional operation circuit, a first matching resistor R5, and a second matching resistor R6. When the circuit diagram of this embodiment measures the individual capacitor voltages of a plurality of super capacitors connected in series, parallel or mixed in series and parallel, each capacitor needs to be equipped with a sampling measurement circuit to for...
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The invention discloses a super-capacitor single voltage sampling measurement circuit. The super-capacitor single voltage sampling measurement circuit comprises an anode partial pressure sampling circuit, a cathode partial pressure sampling circuit, a scaling operating circuit, a first matched resistor and a second matched resistor. The first matched resistor is connected between an output end of the anode partial pressure sampling circuit and a reverse-direction input end of the scaling operating circuit, and the second matched resistor is connected between an output end of the cathode partial pressure sampling circuit and a same-direction input end of the scaling operating circuit. The scaling operating circuit comprises an operational amplifier, a feedback resistor and a balance resistor, wherein the feedback resistor is connected between an output end of the operational amplifier and a reverse-direction input end of the operational amplifier, and the balance resistor is connected between a same-direction input end of the operational amplifier and the ground. Compared with the prior art, the super-capacitor single voltage sampling measurement circuit has the advantages of requiring no co-grounding with high potential capacitors to be measured, and requiring no high voltage isolation; and under the premise of maintaining high measurement accuracy, the circuit has the advantages of simplifying circuit structure, lowering circuit cost and prolonging circuit service life.
Description
technical field [0001] The invention relates to the technical field of voltage sampling and measurement of a plurality of series, parallel and hybrid supercapacitor cells, in particular to a voltage sampling and measurement circuit of a supercapacitor cell. Background technique [0002] There are various existing voltage sampling circuits for supercapacitors, including common-mode measurement methods, relay switching extraction voltage methods, V / F conversion non-contact sampling extraction voltage methods, and floating ground technology measurement methods, but the above methods all have accuracy. Low, short circuit life, high cost and many other obvious disadvantages. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a supercapacitor monomer voltage sampling and measurement circuit that does not need to share the ground with the high-potential capacitor to be measured and does not require high-voltage isolation. ...
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Inventor 周强杨万良黄传仁吴超
Owner TIG TECH CO LTD