KR100221268B1 - Discharging time expectation circuit of charging device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charger discharge time prediction circuit, comprising: low voltage detection means, detection means for delaying a current voltage output by the rechargeable battery to detect a difference with a current voltage, and detecting a small change in the voltage difference. A full discharge detection means comprising a differential means, a comparison means and an amplification means, a time difference input means for inputting a complete discharge time of a rechargeable battery by connecting the full discharge detection means and the low voltage detection means in parallel, and The predicted time display means having a display means for displaying the value output from the time difference input means compares the time when the low voltage is detected with the discharge detection time of the rechargeable battery so as to display the time at which the complete discharge of the rechargeable battery is predicted. This predicted time is displayed to provide an effect of preventing the running program from being deleted due to the full discharge of the rechargeable battery.

Description

Charger Discharge Time Prediction Circuit

The present invention relates to a charger discharge time prediction circuit. More particularly, the present invention provides a display means for comparing the time at which a low voltage is detected with the discharge detection time of a rechargeable battery so as to know the time at which the full discharge of the rechargeable battery is estimated. The present invention relates to a charger discharge time estimation circuit that prevents the program from being deleted or the machine suddenly stopped due to the full discharge of the rechargeable battery.

In general, battery cells have been the main cause of environmental pollution with carbon-based fuel with the development of the industry. As a result, the use of electricity as an alternative energy has increased, and the rechargeable battery industry has also become active.

The conventional technique is to inform the consumption of the battery in advance during VTR recording. As shown in FIG. 1, the three-stage switch level adjusting unit (SW) and the reference voltage and the battery of which the variable reference voltage can be varied as shown in FIG. A system control unit for stopping the operation of the set by the comparison detection unit 1 for detecting the voltage, the warning oscillator 2 for notifying that the battery BT is exhausted, and the signal output from the comparison detection unit 1 ( SC) connection was configured.

According to the related art, when the battery BT is mounted, a predetermined reference voltage of the zener diode ZD1 is input to the non-inverting (+) terminals of the comparators OP1 and OP2. The discharge cover condition of the battery can change the comparison voltage of the comparison heavy amplifier OP2 by the resistors R2 ... R4 and the switches SW1 ... SW3. When the voltage of the inverting (−) terminal thereof is lower than the voltage of the input non-inverting (+) terminal of the comparison amplifier OP2, the compared voltage is output from the comparison amplifier OP2.

The output voltage is inputted to the alarm output device to notify in advance that the battery BT is consumed from the alarm oscillator through the diode D3 and the speaker SP.

However, the conventional technology has a problem that the full discharge detection circuit of the rechargeable battery only detects the effective voltage of the rechargeable battery and notifies the user when it is not the effective voltage, and then charges the rechargeable battery to terminate the machine.

The present invention has been made in order to solve such a conventional problem, the purpose of which is to predict the complete discharge by comparing the discharge detection time of the rechargeable battery with the time when the low voltage is detected so as to know the time when the complete discharge of the rechargeable battery is predicted By displaying the time to be displayed as a display means to prevent the operation program is deleted or the machine suddenly stopped due to the full discharge of the rechargeable battery.

The configuration of the present invention for achieving the above object is to know the comparison means for comparing the change voltage of the charger with the reference voltage, the amplification means for amplifying the comparison output voltage of the comparison means and the low voltage detection output from the amplification means A low voltage detecting means having an output means for outputting a voltage, said low voltage detecting means comprising: detecting means for delaying a current voltage output by said rechargeable battery and detecting a difference between said current voltage and a voltage output from said detection means; A differential means for detecting a minute change in difference, a comparison means for comparing the change value output from said differentiation means with a reference change value, and an amplification means for amplifying and outputting the comparison value output from said comparison means; A complete discharge of the rechargeable battery predicted according to the input value by connecting the full discharge detection means and the above-mentioned full discharge detection means and the low voltage detection means in parallel. And time difference input means for inputting time and display means for displaying a value output from the time difference input means.

No content.

* Explanation of symbols for main parts of the drawings

BT: Battery R1 ~ R8: Resistance

SW: 3-stage switch level adjuster SW ~ SW3: Switch

OP1, OP2: Comparative amplifier D1 ~ D2: Diode

C1: Capacitor AND: And Gate

SP: Speaker SC: System Control

1: comparison detector 2: alarm oscillator

COM1 ~ COM4: Comparator AMP1, AMP2: Amplifier

MI: Differentiator 10: Low voltage detection circuit

20: complete discharge detection circuit 30: prediction time display circuit

31: Time difference input 32: Time difference display

Hereinafter, a structure according to the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

The present invention relates to a device for allowing a user to know the estimated time for a full discharge of a rechargeable battery, and as shown in FIG. 2, a comparator (COM1) for inputting an output voltage of the rechargeable battery to be compared with a reference voltage. The low voltage detection unit 10 having an amplifier AMP1 for amplifying the comparison value output from the comparator COM1 is connected.

Further, the voltage output from the rechargeable battery is delayed through the delay circuit COM2, which causes the current output voltage to be delayed, and the delayed voltage is passed through the comparator COM4 comparing the difference between the current voltages to differentiate the minute difference M1. And a full discharge detection circuit having a comparator COM4 for comparing the small change output from the differentiator M1 with a reference voltage and an amplifier AMP2 for amplifying the comparison value output from the comparator COM4. (20) is connected.

The safety discharge detection circuit 20 and the low voltage detection circuit 10 are connected to the time difference input unit 31 of the predicted time display circuit 30 in parallel to input the time difference, and then display the time difference 32. Configure the connection for display on the means.

Referring to the effect of the present invention configured as described in detail as follows.

The present invention relates to a device for displaying the estimated time for the full charge of the rechargeable battery, as shown in FIG. 2, the comparator (COM1) of the low voltage detection circuit 10 inputs the voltage output from the rechargeable battery to the output voltage of the rechargeable battery After comparing the reference voltage with the amplifier (AMP1) to inform the low voltage of the charger.

The low voltage of the charger is stored by inputting the current time to the time difference input unit 31 of the predictive time circuit 30.

In addition, the voltage of the charger is input to the voltage detecting means COM2 and COM4 of the full discharge detecting circuit 20. The voltage detecting means COM2 and COM3 delay the current input voltage by a predetermined time and then delay the voltage. The change in voltage is detected by comparing the voltage output from the current charger.

The voltage having the change value is obtained through the microdifferentiator M1, which is obtained by the discharge of the rechargeable battery, is compared with the reference voltage by the comparator COM4, and then amplified by the amplifier AMP2.

The minute voltage change of the rechargeable battery output from the full discharge detection circuit 20 is input to the prediction time display means.

The predicted time display means uses a sound alarm or a lamp that emits light for a certain time.

The prediction time display circuit 30 first inputs and stores the charging time output from the low voltage detection circuit 10, and then inputs and saves the time output from the full discharge detection circuit 31 to store the difference between the first stored time and the later stored time. By calculating the value of to calculate the time that the rechargeable battery is completely discharged to display the estimated time through the display (32) means so that the time can be recognized by knowing the electrical level.

The discharge indication of the rechargeable battery is displayed by the display means at the time when the low voltage and the complete discharge are detected, and converts the voltage difference output from each circuit into the time difference to display the time when the complete discharge of the rechargeable battery is predicted.

The present invention, which operates in this way, displays the time when the low voltage is detected and the time when the full discharge is predicted compared to the discharge detection time of the rechargeable battery so as to display the time when the full discharge of the rechargeable battery is predicted. This is to prevent the program from being deleted.

Claims (3)

A low voltage having comparison means for comparing the change voltage of the charger with a reference voltage, an amplifying means for amplifying the comparative output voltage of the comparing means, and an output means for outputting the low voltage detection output from the amplifying means; A detecting means, comprising: detecting means for detecting a difference from a current voltage by delaying a current voltage output from the rechargeable battery, differential means for detecting a minute change in a difference between the voltage output from the detecting means, and A full discharge detection means comprising: a comparison means for comparing the change value output from the differentiation means with a reference change value, and an amplification means for layer widthly outputting the comparison value output from the comparison means; A time difference input means for connecting the means and the low voltage detecting means in parallel and inputting a complete discharge time of the rechargeable battery according to the input value; And a prediction time display means having display means for displaying a value output from the inter-difference input means. The charger discharge time estimation circuit according to claim 1, wherein the prediction time display means has a function that can be temporarily stored for distinguishing the difference value of the input time. The charger discharge time estimation circuit according to any one of claims 1 to 3, wherein the prediction time display means has a function of calculating a difference in time input.

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