CN2150658Y

CN2150658Y - Fully automatic charger

Info

Publication number: CN2150658Y
Application number: CN 93206190
Authority: CN
Inventors: 麦伟洪
Original assignee: XINYI ELECTRONICS FACTORY XIAOLAN TOWN ZHONGSHAN CITY
Current assignee: XINYI ELECTRONICS FACTORY XIAOLAN TOWN ZHONGSHAN CITY
Priority date: 1993-03-06
Filing date: 1993-03-06
Publication date: 1993-12-22
Anticipated expiration: 2003-03-06

Abstract

A full-automatic charger is composed of reference voltage circuit, battery voltage detecting circuit, comparing circuit, control circuit, rechargeable battery, power supply circuit, casing and charging frame. The reference voltage set by the reference voltage circuit and the battery voltage detected by the battery voltage detection circuit are both sent to the comparison circuit for comparison, so that the control circuit controls the power supply to charge the battery. The utility model discloses can the automated inspection battery in the change of charging process voltage to control is charged or stops to charge, and high-efficient economize on electricity, and convenient to use can save time and money for the user.

Description

Fully-automatic charger

The utility model relates to a kind of charger, particularly a kind of full-automatic charger.

Existing charger generally is to charge the battery in accordance with regulations time, and because of each battery self with the electric weight difference, thereby be easy to occur the situation that overcharges or owe to fill, cause the lost of life of battery.

The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art part and a kind of variation that battery is pressed voltage in the charging process that can detect automatically is provided, thereby control is to battery charge or the full-automatic charger that stops charging.

The purpose of this utility model can reach by following measure: the utility model comprises rechargeable battery, power circuit, is loaded on the battery charging rack in the housing, it is characterized in that: also have reference voltage circuit, battery voltage detection circuit, comparison circuit, control circuit, reference voltage that reference voltage circuit is set and the detected cell voltage of battery voltage detection circuit are all delivered to comparison circuit and are compared, the output of comparison circuit is battery charge by control circuit control power circuit, and battery voltage detection circuit is sent in the output of battery back to.

The purpose of this utility model can also reach by following measure: power supply indicator LED2, charging indicator light LED1 also are housed on the panel of housing.The output of rectifier bridge D2～D6 is joined by the in-phase input end of integrated circuit (IC) 1 in diode D8, resistance R 9, R2, R3 and the comparison circuit in the power circuit, resistance R 2 is connected in series with resistance R 1, diode D1 in the reference voltage circuit 1, resistance R 5 is joined in the inverting input of IC1 and the battery voltage detection circuit, and join by resistance R 6 and battery, the output of IC1 joins by the grid of controllable silicon SCR in resistance R 1 and the control circuit, and the anode of SCR, negative electrode are connected in series with LED 1 and battery.

Fig. 1 is a functional-block diagram of the present utility model;

Fig. 2 is a contour structures schematic diagram of the present utility model;

Fig. 3 is an electrical schematic diagram of the present utility model.

The utility model is described in further detail below in conjunction with accompanying drawing (embodiment):

With reference to Fig. 1, Fig. 2, the utility model is made up of reference voltage circuit 1, battery voltage detection circuit 2, comparison circuit 3, control circuit 4, battery 5, power circuit 6, housing 7, charging rack 8 etc.Four charging racks 8 all are contained in the housing 7, can be respectively four battery charge; Power supply indicator LED2, four road charging indicator light LED1 are housed on the panel of housing 7.

With reference to Fig. 3, reference voltage circuit 1 is made up of resistance R 1～R4, diode D1, D2 etc.; Battery voltage detection circuit 2 is made up of resistance R 5, R6; Comparison circuit 3 is made up of integrated circuit (IC) 1, resistance R 7 etc.; Control circuit 4 is made up of controllable silicon SCR, resistance R 10, R11, red light emitting diodes LED1 etc.; Power circuit 6 comprises transformer B, rectifier bridge D3～D6, resistance R 8, R9, diode D8, capacitor C, voltage stabilizing didoe DW, green LED LED2 etc.Circuit among the figure in the dotted portion has identical quadruplet, economizes picture herein.

To exchange 220 volts by transformer B and become 7～8 volts,, alternating current be become pulsed power supplies through rectifier bridge D3～D6 rectification, as charging, and give other circuit supply, D8 plays buffer action, after capacitor C filtrate and voltage-stabiliser tube DW voltage stabilizing, obtain a stable voltage and supply with other circuit.Form the reference voltage that detects by R1, R2, D1, be input to the in-phase input end of integrated circuit (IC) 1 through R3; R6 takes out the voltage of battery, and with the R5 dividing potential drop after the inverting input of input IC1 because R5=R6, then be half of cell voltage at the voltage of IC1 inverting input.The effect of IC1 is that reference voltage and cell voltage (half) are made comparisons, and when cell voltage was lower than 1.2 volts, the IC1 output was high level, triggers controllable silicon SCR D conducting through R7, and electric current flows into battery, and LED1 is bright, and expression is charged.Because ickel-cadmium cell is behind full electricity, as continuing charging, voltage can rise to more than 1.4 volts by 1.2 volts very soon, at this moment inverting input voltage is higher than in-phase input end voltage, and output shows low level, SCR triggerless voltage and ending, no current is gone into battery, and LED1 extinguishes, and expression has stopped charging.D2, R4 play self-locking action, with the in-phase end voltage control to being 0.6 volt when output is low level, being 0.7 volt during high level, thereby charging when reaching battery low-voltage (1.2 volts), and the purpose of stopping filling during high voltage (1.4 volts).

This charger also can be used as differentiates true and false ickel-cadmium cell; When false battery is put into when charging, because the voltage of false battery is generally about 1.5 volts, then circuit can not charge, and luminous tube LED1 does not work.

The utility model has following advantage compared to existing technology: can automatically detect the variation of battery voltage in charging process, thereby control charging or stop charging being made the best use of everything rechargeable battery, and efficient electricity-saving, easy to use, can not affect life-span of battery; And the circuit advantages of simple can be that the user saves time and money.

Claims

1, a kind of full-automatic charger, comprise rechargeable battery 5, power circuit 6, be loaded on the battery charging rack 8 in the housing 7, it is characterized in that: also have reference voltage circuit 1, battery voltage detection circuit 2, comparison circuit 3, control circuit 4, reference voltage that reference voltage circuit 1 is set and battery voltage detection circuit 2 detected cell voltages are all delivered to comparison circuit 3 and are compared, the output of comparison circuit 3 is battery 5 chargings by control circuit 4 control power circuits 6, and battery voltage detection circuit 2 is sent in the output of battery 5 back to.

2, charger according to claim 1 is characterized in that: power supply indicator LED2, charging indicator light LED1 also are housed on the panel of housing 7.

3, charger according to claim 1, it is characterized in that: the output of rectifier bridge D2～D6 is by diode D8 in the power circuit 6, resistance R 9, R2, the in-phase input end of integrated circuit (IC) 1 joins in R3 and the comparison circuit 3, resistance R 1 in resistance R 2 and the reference voltage circuit 1, diode D1 serial connection, resistance R 5 is joined in the inverting input of IC1 and the battery voltage detection circuit 2, and join by resistance R 6 and battery 5, the output of IC1 joins the anode of SCR by the grid of controllable silicon SCR in resistance R 1 and the control circuit 4, negative electrode is connected in series with LED 1 and battery 5.