CN204154789U - Automobile storage battery trigger voltage metering circuit - Google Patents

Automobile storage battery trigger voltage metering circuit Download PDF

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Publication number
CN204154789U
CN204154789U CN201420573491.4U CN201420573491U CN204154789U CN 204154789 U CN204154789 U CN 204154789U CN 201420573491 U CN201420573491 U CN 201420573491U CN 204154789 U CN204154789 U CN 204154789U
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China
Prior art keywords
trigger voltage
voltage
circuit
storage battery
automobile storage
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CN201420573491.4U
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Chinese (zh)
Inventor
刘世泉
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BEIJING INFORMATION TECHNOLOGY COLLEGE
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BEIJING INFORMATION TECHNOLOGY COLLEGE
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Abstract

The utility model provides a kind of automobile storage battery trigger voltage metering circuit, the trigger voltage of its energy measured automobiles engine start moment accumulator, and the voltage measured is kept in holding capacitor, this voltage change ratio is reduced, thus improves the measuring accuracy of trigger voltage.This circuit can also when trigger voltage is less than setting value LED lamp alarm, prompting will be safeguarded accumulator.

Description

Automobile storage battery trigger voltage metering circuit
Technical field
The utility model relates to a kind of automobile storage battery trigger voltage metering circuit, belongs to technology of instrument and meter field.
Background technology
Voltage during automobile starting between accumulator anode and cathode is called accumulator trigger voltage.Measuring accumulator trigger voltage extremely important, by measuring the size of accumulator trigger voltage, can judge that whether battery-operated is normal.If when accumulator trigger voltage is close to minimum trigger voltage value, safeguard with regard to reply accumulator, such as: charge a battery, change accumulator etc.Otherwise automobile cannot normally start.Because trigger voltage just exists instantaneously at automobile engine starting, so use voltage table on-line measurement, or start the pull-up resistor off-line measurement of moment with a very thick resistance wire simulated automotive, error is all larger.
Summary of the invention
In order to reduce the measuring error of trigger voltage, the utility model provides a kind of automobile storage battery trigger voltage metering circuit, the trigger voltage of its energy measured automobiles engine start moment, and the voltage measured is kept in holding capacitor, this voltage change ratio is reduced, thus improves the measuring accuracy of trigger voltage.This circuit can also when trigger voltage is less than setting value LED lamp alarm, prompting will be safeguarded accumulator.
The technical scheme that the utility model technical solution problem adopts is: this metering circuit is by DC voltage minimum value testing circuit and compare alarm indication circuit and form.It is characterized in that: have employed DC voltage minimum value testing circuit, it detects the trigger voltage of accumulator instantaneously at automobile engine starting, this voltage send and compares alarm indication processing of circuit and the display of trigger voltage display unit.
Described DC voltage minimum value testing circuit comprises resistance R1, R2, R3, R4, electric capacity C1, diode D1, integrated operational amplifier IC1:A, IC1:B and reset button switch, wherein electric capacity C1 positive pole is connected with diode D1 positive pole, diode D1 negative pole is connected with resistance R3, and resistance R3 is connected with (1) pin of integrated operational amplifier IC1:A.
Described comparison alarm indication circuit comprises resistance R5, R6, R7, R8, potentiometer RV1, diode D2, D3, triode Q1 and integrated operational amplifier IC1:C.
Described trigger voltage display unit is made up of digital voltmeter.
Compared with prior art, the trigger voltage displaying time that the technical program measures is long, and measuring accuracy is high, and circuit is simple, is convenient to miniaturization, can be arranged on the plug of cigar lighter, without street rod circuit, just can complete measurement.This circuit also can be used for the battery cell monitoring of New-energy electric vehicle, has very strong practicality.
Accompanying drawing explanation
Fig. 1 is automobile storage battery trigger voltage metering circuit figure of the present utility model;
Fig. 2 is automobile storage battery trigger voltage metering circuit block diagram of the present utility model.
Embodiment
Automobile storage battery trigger voltage metering circuit as shown in Figure 1.This circuit is by DC voltage minimum value testing circuit and compare alarm indication circuit and form.Introduce the embodiment of each several part below respectively.
1, DC voltage minimum value testing circuit
When automobile starting, the electric current of accumulator supply starter motor reaches hundreds of amperes, the voltage transient falling that accumulator exports, and reach minimum value, this circuit can detect and keep this valley voltage, for subsequent conditioning circuit process.Selected components and parts: resistance R1, R2, R3, R4 are 1/16W metalfilmresistors; C1 is holding capacitor, and its model is 1000uf/25V electrochemical capacitor; Diode D1 model is 1N4007, and the model of integrated operational amplifier IC1:A and IC1:B is LM324.
2, alarm indication circuit is compared
This electric routing resistance R5, R6, R7, R8, potentiometer RV1, diode D2, D3, triode Q1 and integrated operational amplifier IC1:C forms.Wherein resistance R5, R6, R7, R8 is 1/16W metalfilmresistor; Potentiometer RV1 is multiturn potentiometer; The model of diode D2 is 1N755A, D3 is red LED pipe; , the model of triode Q1 is 9013; The model of integrated operational amplifier IC1:C is LM324.
3, trigger voltage display unit
This unit is a digital voltage gauge outfit, again demarcate, when requiring input 8V, and display 16V.
In automobile storage battery trigger voltage metering circuit of the present utility model, DC voltage minimum value testing circuit plays a part key, and wherein the self discharge time constant of electric capacity C1 wants large, otherwise trigger voltage displaying time will shorten.Must reset button be clicked before each measurement trigger voltage, make digital voltmeter show the current voltage of accumulator.

Claims (1)

1. this automobile storage battery trigger voltage metering circuit is by DC voltage minimum value testing circuit with compare alarm indication circuit and form, it is characterized in that: have employed DC voltage minimum value testing circuit, described DC voltage minimum value testing circuit comprises resistance R1, R2, R3, R4, electric capacity C1, diode D1, integrated operational amplifier IC1:A, IC1:B and reset button switch, wherein electric capacity C1 positive pole is connected with diode D1 positive pole, diode D1 negative pole is connected with resistance R3, and resistance R3 is connected with (1) pin of integrated operational amplifier IC1:A.
CN201420573491.4U 2014-10-08 2014-10-08 Automobile storage battery trigger voltage metering circuit Active CN204154789U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420573491.4U CN204154789U (en) 2014-10-08 2014-10-08 Automobile storage battery trigger voltage metering circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420573491.4U CN204154789U (en) 2014-10-08 2014-10-08 Automobile storage battery trigger voltage metering circuit

Publications (1)

Publication Number Publication Date
CN204154789U true CN204154789U (en) 2015-02-11

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CN201420573491.4U Active CN204154789U (en) 2014-10-08 2014-10-08 Automobile storage battery trigger voltage metering circuit

Country Status (1)

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CN (1) CN204154789U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105092262A (en) * 2015-07-13 2015-11-25 深圳市中兴物联科技有限公司 Vehicle starting detection apparatus and method
CN109143101A (en) * 2018-07-27 2019-01-04 重庆长安汽车股份有限公司 A kind of automobile storage battery status monitoring warning system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105092262A (en) * 2015-07-13 2015-11-25 深圳市中兴物联科技有限公司 Vehicle starting detection apparatus and method
CN109143101A (en) * 2018-07-27 2019-01-04 重庆长安汽车股份有限公司 A kind of automobile storage battery status monitoring warning system and method
CN109143101B (en) * 2018-07-27 2020-01-14 重庆长安汽车股份有限公司 Automobile storage battery state monitoring and warning system and method

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