CN102611178A

CN102611178A - Charger capable of respectively charging nickel-cadmium/nickel-hydrogen rechargeable batteries

Info

Publication number: CN102611178A
Application number: CN2012101134822A
Authority: CN
Inventors: 黄宇嵩
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-17
Filing date: 2012-04-17
Publication date: 2012-07-25

Abstract

The invention discloses a charger capable of respectively charging nickel-cadmium/nickel-hydrogen rechargeable batteries. The charger consists of a 220V alternating current power supply, a transformer B, a full-bridge rectification circuit, a voltage stabilizing circuit, four groups of charging loops and a charging state indication circuit. The technical requirements of charging of the nickel-cadmium/nickel-hydrogen rechargeable batteries are strict, most of chargers sold on markets are manufactured in a rough way, the charger capable of respectively discharging the nickel-cadmium/nickel-hydrogen rechargeable batteries, disclosed by the invention, outputs stable voltage as full-charge automatic-stop control voltage by utilizing a three-end adjustable integrated voltage stabilizing block (LM317T) so as to effectively prevents a problem that a rechargeable battery is broken due to over-load charging; in addition, LEDs (Light Emitting Diodes) are respectively connected into the four groups of charging loops, and the charging state of each charging battery can be indicated independently during charging.

Description

The NI-G nickel-hydrogen chargeable cell charger that can charge respectively

Technical field

The invention belongs to rechargeable battery charging technique field, relate to a kind of NI-G nickel-hydrogen chargeable cell charger that can charge respectively.

Background technology

The charging of NI-G or Ni-MH battery has strict specification requirement, and the technology that charger is commonly used has charging modes such as level pressure unsteady flow, variable voltage and variable current, pulsed, constant current level pressure.And mostly the charger of selling on the market is to manufacture in a rough and slipshod way, and through several kinds of chargers on the analysis market, its internal circuit mostly adopts 1 6～9V wattage transformer, carries out using 1 resistance current-limiting charge again after the halfwave rectifier with 1 diode.Have on current-limiting resistance and connect 1 light-emitting diode and carry out so-called " charged state indication ", charging current is many not to be waited at 20～70mA, uses so easy charger charging if rechargeable battery is long-term, the life-span of rechargeable battery will be greatly affected.

The NI-G nickel-hydrogen chargeable cell charger that can charge respectively according to the invention, effectively prevents overcharge and damages the problem of rechargeable battery as being full of automatic stop control voltage with three end adjustable voltage-regulating ic pieces (LM317T) output burning voltage; In 4 groups of charge circuits, insert LED respectively, solved each rechargeable battery and in charging process, respectively organized charged state independence indication problem.

Below specify the NI-G nickel-hydrogen chargeable cell charger that can charge respectively of the present invention related relevant technologies content in implementation process.

Summary of the invention

Goal of the invention and beneficial effect: the charging of NI-G or Ni-MH battery has strict specification requirement, and the charger common technology has charging modes such as level pressure unsteady flow, variable voltage and variable current, pulsed, constant current level pressure.And mostly the charger of selling on the market is to manufacture in a rough and slipshod way; The NI-G nickel-hydrogen chargeable cell charger that can charge respectively of the present invention, effectively prevents overcharge and damages the problem of rechargeable battery as being full of automatic stop control voltage with three end adjustable voltage-regulating ic pieces (LM317T) output burning voltage; In 4 groups of charge circuits, insert LED respectively, solved each rechargeable battery and in charging process, respectively organized charged state independence indication problem.

The circuit working principle: the NI-G nickel-hydrogen chargeable cell charger that can charge respectively is a kind of employing constant-voltage charge mode; Integrated circuit is made up of 4 groups of the same circuit of charge circuit structure; Can charge respectively or all to 4 joint Ni-Cd nickel-cadmiums, rechargeable battery promptly can automatic stop after being full of electricity.Solved Ni-Cd nickel-cadmium serial connection charge electric quantity balancing problem each other in the past, but and every equal independent displaying of rechargeable battery charged state.

Regulator potentiometer RP; Making the output voltage of the adjustable voltage stabilizing integrator of three ends LM317 is predetermined value Vout; When the voltage of rechargeable battery progressively rose to Vout-0.65V, corresponding N PN transistor npn npn got into cut-off state, realized that rechargeable battery stops charging; Corresponding simultaneously charging indicator light LED extinguishes, and the size of its charging current is limited by resistance R 3～R6 and indicator light LED1～LED4.Because of receiving the restriction of indicator light LED, so the charging current of every group of rechargeable battery must be controlled at below the 30mA.

Technical scheme: the NI-G nickel-hydrogen chargeable cell charger that can charge respectively, it is made up of 220V AC power, transformer B, full bridge rectifier and voltage stabilizing circuit, 4 groups of charge circuits and charged state indicating circuit, and its characteristic comprises:

Full-bridge rectification and voltage stabilizing circuit: form by the adjustable integrated package of pressure-stabilizing IC1 of three ends, resistance R 1 and potentiometer RP; The input (3 pin) of three ends are adjustable integrated package of pressure-stabilizing IC1 meets the anodal VCC of the anodal output of full bridge rectifier connection circuit; The end of output end of pressure-stabilizing (2 pin) the connecting resistance R1 of three ends are adjustable integrated package of pressure-stabilizing IC1; The adjustment end (1 pin) of the adjustable integrated package of pressure-stabilizing IC1 of another termination three ends of resistance R 1 and the end of potentiometer RP, the other end of potentiometer RP and lever arm connection circuit ground GND thereof;

4 groups of charge circuits and charged state indicating circuit: the 1st group of charge circuit and charged state indicating circuit thereof are made up of NPN transistor VT1, resistance R 2 and LED 1, resistance R 3; The end of the base stage connecting resistance R2 of NPN transistor VT1; The output end of pressure-stabilizing (2 pin) of the adjustable integrated package of pressure-stabilizing IC1 of another termination three ends of resistance R 2; The end of the collector electrode connecting resistance R3 of NPN transistor VT1, the negative pole of the other end sending and receiving optical diode LED1 of resistance R 3, the anodal output of the anodal connection circuit VCC of LED 1; The emitter of NPN transistor VT1 connects the positive terminal of rechargeable battery, the negative terminal connection circuit ground GND of rechargeable battery;

In 4 groups of charge circuits and the charged state indicating circuit the 2nd group, the 3rd group with the formation of the 4th group of charge circuit and charged state indicating circuit thereof and annexation fills the loop piece with the 1st group and the charged state indicating circuit is formed identical.

The anodal output of full bridge rectifier links to each other with circuit anode VCC, and the output of full bridge rectifier negative pole links to each other with circuit ground GND.

Description of drawings

Accompanying drawing 1 is the used in an embodiment circuit working schematic diagram of NI-G nickel-hydrogen chargeable cell charger that can charge respectively.

Embodiment

Below in conjunction with accompanying drawing 1 and description of drawings, and implement to realize the present invention according to components and parts subordinate list and following specification requirement.

Components and parts title and important technological parameters

Element number	The components and parts title	Leading indicator	Quantity	Remarks
					IC1	LM317T or LM338	TO-220 or TO-3 encapsulation	1	Positive polarity output
QZ	1N4001 (silicon rectifier diode)	1A/50V	4	Or select 1N4002
					VT1～VT4	NPN transistor	2SC9013、β≥120	4
LED1～LED4	Red light emitting diodes	￠5	4
					RP	Potentiometer	510Ω、1W	1
R1	Metalfilmresistor	200Ω、1/4W	1
					R2、R7、R8、R9	Metalfilmresistor	10Ω、1/4W	4
R3～R6	Metalfilmresistor	30Ω、1/4W	4
					B	AC transformer	Output voltage 4.5～6V, 3W	1

Circuit production main points and circuit debugging

AC transformer B: selecting power for use is that 3W, secondary coil output voltage are the transformer of 4.5～6V;

Three end adjustable voltage-regulating ic pieces: the LM338 that must select anodal output plastic packaging LM317T or metallic packaging for use;

Three end adjustable voltage-regulating ic pieces (LM317T) need not install any radiator additional in use;

The voltage stabilizing output valve: the resistance of adjustment potentiometer RP makes voltage stabilizing output valve Vout reach 2.25V.

Method for using

Before indoor charging, remember remaining electric weight for eliminating rechargeable battery, should carry out the standard discharge on request, when discharging current was 300mA, the final voltage of rechargeable battery bringing onto load discharge was 0.85～0.90V;

When charging at a slow speed, every joint rechargeable battery control voltage is 1.60V, and charger design has the automatic stopping circuit of being full of, and can effectively prevent overcharge and damages rechargeable battery;

Rechargeable battery joint number: can be 1～4 joint NI-G or nickel-hydrogen chargeable cell and charge respectively;

The general charging interval was controlled at 16～18 hours, and rechargeable battery charges under little current system situation, help to fill rechargeable battery full, and rechargeable battery was difficult for heating, can damage rechargeable battery;

The battery of the older or poor-performing of rechargeable battery, the charging interval is suitable longer.

Claims

1. NI-G nickel-hydrogen chargeable cell charger that can charge respectively, it is made up of 220V AC power, transformer B, full bridge rectifier and voltage stabilizing circuit, 4 groups of charge circuits and charged state indicating circuit, and its characteristic comprises:

Full-bridge rectification and voltage stabilizing circuit are made up of the adjustable integrated package of pressure-stabilizing IC1 of three ends, resistance R 1 and potentiometer RP; The input (3 pin) of three ends are adjustable integrated package of pressure-stabilizing IC1 meets the anodal VCC of the anodal output of full bridge rectifier connection circuit; The end of output end of pressure-stabilizing (2 pin) the connecting resistance R1 of three ends are adjustable integrated package of pressure-stabilizing IC1; The adjustment end (1 pin) of the adjustable integrated package of pressure-stabilizing IC1 of another termination three ends of resistance R 1 and the end of potentiometer RP, the other end of potentiometer RP and lever arm connection circuit ground GND thereof;

The 1st group of charge circuit and charged state indicating circuit thereof in 4 groups of charge circuits and the charged state indicating circuit are made up of NPN transistor VT1, resistance R 2 and LED 1, resistance R 3; The end of the base stage connecting resistance R2 of NPN transistor VT1; The output end of pressure-stabilizing (2 pin) of the adjustable integrated package of pressure-stabilizing IC1 of another termination three ends of resistance R 2; The end of the collector electrode connecting resistance R3 of NPN transistor VT1, the negative pole of the other end sending and receiving optical diode LED1 of resistance R 3, the anodal output of the anodal connection circuit VCC of LED 1; The emitter of NPN transistor VT1 connects the positive terminal of rechargeable battery, the negative terminal connection circuit ground GND of rechargeable battery;

Form identical with the formation and the annexation of the 4th group of charge circuit and charged state indicating circuit thereof with the 1st group of charge circuit and charged state indicating circuit thereof for the 2nd group, the 3rd group in 4 groups of charge circuits and the charged state indicating circuit;