KR930018808A

KR930018808A - Auxiliary battery charge / discharge circuit

Info

Publication number: KR930018808A
Application number: KR1019920002853A
Authority: KR
Inventors: 윤재용
Original assignee: 강진구; 삼성전자 주식회사
Filing date: 1992-02-25
Publication date: 1993-09-22

Abstract

주전원과 예비전원으로 이루어지는 전원장치에 있어서 예비전원을 제어하는 회로에 관한 것으로, 특히 2차 전지를 예비전원으로 취하는 전원장치의 충방전 회로에 관한 것이다.The present invention relates to a circuit for controlling a preliminary power supply in a power supply device comprising a main power supply and a reserve power supply, and more particularly, to a charge / discharge circuit of a power supply device that takes a secondary battery as a reserve power supply.

주전원과 예비전원이 모두 연결되어 정상적인 경우 최초 주전원을 외부로 공급함과 동시에 예비전원 유무를 판단하여 보조 배터리에 정상충전 전류를 흘려주고, 보조배터리의 전압이 많이 떨어져 있음이 감지되면 보조 배터리로 다량의 전류가 흐르도록 함으로써 급속 충전시켜 정상상태로 환원된다.When both the main power and the spare power are connected, if it is normal, supply the initial main power to the outside and judge the presence or absence of the spare power to supply the normal charging current to the auxiliary battery, and if it detects that the voltage of the auxiliary battery is too low, By charging the current, it is rapidly charged and reduced to the normal state.

또한 주전원 이상 발생시에는 보조배터리의 전압을 외부로 공급하도록 함으로써 충방전의 안정화 및 시스템의 안정화를 꾀한다.In addition, in case of abnormal main power supply, the voltage of the auxiliary battery is supplied to the outside to stabilize charging and discharging and stabilizing the system.

Description

Auxiliary battery charge / discharge circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 회로도.1 is a circuit diagram of the present invention.

Claims

In the vehicle tracking device, the one-way switching unit 10 is connected between the main power supply terminal (A) and the external power supply terminal (D) to prevent the preliminary power from flowing to the outside when the main power is shorted, and the main power supply. The main power is input from the supply terminal (A) and compared with the first reference voltage to determine whether the main power is present, and the reserve power is input from the reserve power supply terminal (B) and compared with the second reference voltage. Auxiliary battery presence determination unit 30 for determining the presence or absence of the auxiliary battery and the auxiliary battery for inputting the reserve power from the reserve power supply terminal (B) and judging the excessive discharge of the secondary battery voltage compared to the third reference voltage One end is connected to the voltage determining unit 40 and the spare power supply terminal B, and the normal charging current control unit 5 compensates by always flowing a constant current to maintain the auxiliary battery at a capacity. 0), a first switch SW1 connected between the main power input terminal A and the normal charging current control unit 50 and switched according to a result of determining whether the auxiliary battery is present, and one end of the spare power supply terminal ( B) is connected between the second switch (SW2) is switched according to the secondary battery voltage determination result, and the first switch (SW1) and the second switch (SW2) is connected to the main power input during rapid charging of the auxiliary battery A connection between the quick charging current control unit 60 for supplying a large amount of current from the terminal A to the preliminary power supply terminal B, and the preliminary power supply terminal B and the external power supply terminal D. And a third switch (SW3) configured to be switched according to a result of the main power presence / absence determination to apply a preliminary power to the external power supply terminal (D) when the main power is absent.

※ Note: The disclosure is based on the initial application.