CN2064068U - Digital display metering installation for accumulator capacity - Google Patents

Abstract

The utility model discloses a digital display metering installation for accumulator discharge capacity. The structure of the installation is composed of a current regulation part, an overcurrent protection part, a low voltage protection part and a discharge current converting to digital display part. The final voltage of the battery discharge can be monitored automatically and the battery life is lengthened. The new product with complete function, low cost and high efficiency of the electric quantity metering installation is provided for the community.

Description

Digital display metering installation for accumulator capacity

The utility model belongs to the proving installation of accumulator capacity

The metering of electric weight when discharging into final voltage after the effect of this device battery that to be the method that directly shows with numeral promptly be full of electricity to battery capacity uses and exporting, it can show the ampere-hour reading of electric weight intuitively, and supervision at random is installed and controls the device that battery stops to discharge automatically under the situation of critical final voltage, thereby prolong the serviceable life of battery.

Well-known; the instrument of metering electric weight all adopts voltameter to claim coulombmeter again; adopt chemistry or employing electronic electricity meter no matter be; all be in battery charge; connect with battery during discharge, the electric weight that will flow through is noted, and draws ampere-hour unit through artificial conversion then; concrete computation process is that discharge current is adjusted into after the constant current value; do record, when beginning to discharge, manual time-keeping; artificial monitor voltage table; control battery discharge voltage can not be lower than the limit of final discharging voltage, in case arrived critical final voltage, immediate operation is shut down; stop discharge; then according to the record value of record time and the constant discharge current of discharge mutually product draw ampere-hour unit, more than original technology be the dependence manually-operated, finish the metering method of battery capacity; operation is loaded down with trivial details; and the error possibility is big; accuracy is low, controls ineffectively, monitors untimely; show not intuitively, the scope of application has limitation etc.

The objective of the invention is to overcome the shortcoming in original technology, adopt indifference to follow the tracks of and guarantee constant current when detection technique realizes battery discharge; At first the current conversion of battery is become normal voltage, convert standard frequency again to, frequency division is handled then, convert ampere-hour unit again to, show by numeral, thereby design a kind of effectively, accurately, easy to operate, a kind of electric quantity metering device of the metering accumulator institute storing electricity virtual rating of intuitive display.

The objective of the invention is to realize by following measure.

This device adopts full-automatic integrated circuit control structure, has current detecting and keeps constant-current discharge, and inversion frequency and numeral show, low-voltage shutdown voltage protection, excess current shutdown protection, short-circuit protection, overvoltage protection, functions such as electric current reverse connecting protection.

This device is according to this technical characterictic of the absolute constant current of battery request, adopt the electric current indifference to follow the tracks of and detect control technology, guarantee constant current, when strength of current is an ampere-hour, the electric weight that flow through in one hour is an ampere-hour, according to this physical definition, at first current conversion is become measuring voltage, become correlated frequency by voltage transitions, handle through frequency division then, at last synthetic ampere-hour numerical value is carried out numeral and show, the shutdown automatically of this device, the limit of the critical final voltage of monitoring battery, for guaranteeing the control circuit working stability, adopt double-sided printed-circuit board, power amplifier, charactron and other electronic component.

Be described as follows with reference to the accompanying drawings:

Accompanying drawing: the accumulator capacity numeral shows the measuring apparatus circuit diagram

See that Fig. 1 passes through pipe T through the battery output current of over commutation₁At sample resistance R₁Upper generation pressure drop is delivered to K with the output current of battery₁Carry out voltage amplification with set value signal, computing is relatively delivered to K with value of magnification₂, carry out integral operation, then signal is delivered to T₂, use T₂Promote T₁Adjust the size of output current, if electric current is to increase, along with R₁The pressure drop of upper generation is corresponding increase also, through K₁K ₂After two-stage is amplified, at T₂Low voltage signal of upper generation makes T₁Electric current descends, and the steps include:

I↑→VR ₁↓→VK ₁₀↑→VK ₂₀↓→VT ₂↓→VT ₁↓ → adjust I ↓

If electric current reduces, the course of work is just in time opposite, thereby guarantees that the battery discharging electric current is constant current.

I↓→VR ₁↑→VK ₁₀↓→VK ₂₀↑→T _T2↑→VT ₁↑ → adjust I ↑

See Fig. 2, this device is synthetic to the unit of account of accumulator capacity to be to represent current strength with 1 ampere-hour, the electric weight that just flow through in 1 hour in 1 ampere of situation is 1 ampere-hour, take this physical definition as design basis, by the electric current that adopts integrated circuit to form, voltage, change-over circuit between the frequency, carry out signal sampling, analog-to-digital conversion, data are processed, ampere-hour is synthetic, the automatic control process that numeral shows, the method that realizes is that the voltage signal relevant with current signal delivered among the voltage-frequency conversion equipment, produces one and the proportional frequency signal of voltage, again this signal is delivered to frequency/ampere-hour synthesis unit, draw the measurement unit of ampere-second after making frequency signal and time signal comprehensive, process through 3600 frequency divisions, metric Ah counting unit is synthesized in conversion again, and numeral is shown. See Fig. 2, by the reflection constant current value voltage V that draws among Fig. 1_k10Deliver to K₃Amplify, pass through K₄Convert corresponding frequency to, enter frequency divider through K is synthetic, carry out 3600 frequency divisions and process, deliver to then counter, carry out numeral through the decoding pipe and show, draw the ampere-hour number.

See Fig. 3, simultaneously with V _K10Deliver to K ₅, relatively carry out overcurrent protection with standard value, when surpassing set-point, J ₈Action indicator is reported to the police.

See Fig. 4, the accumulator output voltage after the resistance in series sampling, is delivered to K ₆With standard value relatively, when magnitude of voltage is lower than given magnitude of voltage, J _tAction, pilot lamp are reported to the police and are reached the purpose of under-voltage protection.

Characteristics of the present invention:

1) adopt the integrated circuit control structure, working stability, volume is little, and failure rate is low.

2) the automatic indifference of electric current is followed the tracks of to detect and is guaranteed that discharge current is constant.

3) monitoring battery stops assigned voltage automatically, avoids causing the battery permanent damage, extending battery life.

4) use electric current to change voltage into, voltage changes into frequency, synthesize the implementation method of ampere-hour by frequency, carries out numeral and shows that the intuitive display data are accurate, reflects rapid.

5) performance is complete, and cost is low, improves work efficiency

Embodiments of the invention

Implementing range is 0～100 ampere-hour, the relevant voltage signal is again in 0～75 millivolt the process, 0～75 millivolt voltage signal is sent in the voltage amplifier, make voltage amplification, become 0～10 volt of voltage signal, when passing through voltage-frequency converter again, can obtain the frequency signal of 0～10 kilocycle/per second, carry out the conversion of 3600 frequency divisions again, can obtain decimal ampere-hour reading, intuitively show through charactron at last.

Claims (1)

1. A kind of accumulator capacity numeral shows measuring apparatus, it is characterized in that the accumulator output current is through adjusting pipe T ₁Collector, it is exported through R ₁V _R1Terminate to operational amplifier K ₁Input end, K ₁Output terminal is through V _K10Meet K again ₂Input end, K ₂Output is through current-limiting resistance R ₂Meet T ₂Pipe, its output terminal are received and are adjusted pipe T ₁Base stage; K ₁Output terminal V _K10Receive operational amplifier K ₃Input end meets frequency source K through amplification ₄Input end is gone back the input end of connection mode number converter K, and the input end of the output termination counter of K demonstrates the ampere-hour number through deciphering effective numeral; In addition, K ₁Output terminal V _K10Meet operational amplifier K simultaneously ₅End go into end, output terminal is taken over the current protector triode and is promoted relay J ₈By R ₃And R ₄Form battery tension sampling end A and meet operational amplifier K ₆Input end, K ₆Output connects triode and promotes relay J _t