CN102664442A

CN102664442A - General charger for nickel-cadmium and nickel-hydrogen rechargeable batteries

Info

Publication number: CN102664442A
Application number: CN2012101568041A
Authority: CN
Inventors: 韩春龙; 何林
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-19
Filing date: 2012-05-19
Publication date: 2012-09-12

Abstract

The invention discloses a general charger for nickel-cadmium and nickel-hydrogen rechargeable batteries. The charger comprises a 12V direct-current power supply, a voltage stabilizing circuit, four groups of charging circuits and four groups of charging indication circuits. The nickel-cadmium or nickel-hydrogen rechargeable battery generally adopts the following charging modes: constant voltage current transformation, voltage and current transformation, pulse type, constant current and voltage and the like. Most of chargers sold on the market are shoddy, and the service life of the rechargeable battery is shortened if the rechargeable battery is charged by a simple charger for a long time. According to the general charger for nickel-cadmium and nickel-hydrogen rechargeable batteries, the problem of the damage of the rechargeable battery caused by overcharge can be prevented effectively as the stabilized voltage output by a voltage stabilizing block with adjustable three ends is taken as the control voltage for stopping charging if the battery is fully charged; and the difficulty of independent indication of the charging condition of each rechargeable battery in the charging process can be solved.

Description

General NI-G nickel-hydrogen chargeable cell charger

Technical field

The invention belongs to rechargeable battery charging technique field, is about a kind of general NI-G nickel-hydrogen chargeable cell charger.

Background technology

The technology that NI-G or Ni-MH battery charger are commonly used has charging modes such as level pressure unsteady flow, variable voltage and variable current, pulsed, constant current level pressure.The charger of selling on the market is shoddy in the majority, uses easy charger to charge if rechargeable battery is long-term, and the life-span of rechargeable battery will have a greatly reduced quality.

General NI-G nickel-hydrogen chargeable cell charger according to the invention as being full of automatic stop control voltage, efficiently solves the problem that overcharge can be damaged rechargeable battery with three end adjustable voltage-regulating ic pieces output burning voltage; In 4 groups of charge circuits, insert LED respectively, solved each rechargeable battery and in charging process, respectively organized the difficult problem that charged state is independently indicated.

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

Summary of the invention

Goal of the invention and beneficial effect: the technology that NI-G or Ni-MH battery charger are commonly used has charging modes such as level pressure unsteady flow, variable voltage and variable current, pulsed, constant current level pressure.The charger of selling on the market is shoddy in the majority, uses easy charger to charge if rechargeable battery is long-term, and the life-span of rechargeable battery will have a greatly reduced quality.

General NI-G nickel-hydrogen chargeable cell charger 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 output burning voltage; In 4 groups of charge circuits, insert LED respectively, solved each rechargeable battery and in charging process, respectively organized the difficult problem that charged state is independently indicated.

Technical scheme: general NI-G nickel-hydrogen chargeable cell charger, it comprises 12V DC power supply, voltage stabilizing circuit, 4 groups of charge circuits and 4 groups of charging indications, it is characterized in that:

Voltage stabilizing circuit: form by the adjustable integrated package of pressure-stabilizing IC1 of three ends, resistance R 1 and potentiometer RP; The anodal VCC of input (the 3rd pin) connection circuit of three ends are adjustable integrated package of pressure-stabilizing IC1; The end of output end of pressure-stabilizing (the 2nd pin) the connecting resistance R1 of three ends are adjustable integrated package of pressure-stabilizing IC1; The adjustment end (the 1st 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 4 groups of charging indications: the 1st group of charge circuit and charging indication 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 (the 2nd pin) of the adjustable integrated package of pressure-stabilizing IC1 of another termination three ends of resistance R 2; The negative pole of the collector series connection resistance R 3 back sending and receiving optical diode LED1 of NPN transistor VT1; The anodal VCC of the anodal connection circuit of LED 1, the emitter of NPN transistor VT1 connects the positive terminal of rechargeable battery, and circuit ground GND connects the negative terminal of rechargeable battery;

The formation of the 2nd group, the 3rd group and the 4th group of charge circuit and charging indication thereof, annexation and the 1st group fill the loop and charging indication is identical.

The anodal VCC of 12V dc power anode connection circuit, the 12V dc power cathode links to each other with circuit ground GND.

Operation principle: general NI-G nickel-hydrogen chargeable cell charger adopts the constant-voltage charge mode; Integrated circuit is made up of 4 groups of just the same charging circuits of structure; This charger can all or respectively to 1～4 joint Ni-Cd nickel-cadmium charging, rechargeable battery stops after being full of electricity automatically.Thoroughly solved Ni-Cd nickel-cadmium serial connection charge electric quantity balancing problem each other, and the charged state of every rechargeable battery can show separately all.

It is predetermined value Vout that resistance through regulator potentiometer RP makes the output voltage of the adjustable voltage stabilizing integrator of three ends LM317; When every charged battery voltage progressively rises to predetermined value Vout-0.65V; Corresponding NPN transistor gets into cut-off state; Realize that rechargeable battery stops charging, corresponding simultaneously charging indicator light LED extinguishes, and the size of its charging current is by resistance R 3～R6 and indicator light LED1～LED4 restriction.Because of receiving the restriction of indicator light LED maximum operating currenbt, so every group of charging current preferably is controlled within the 30mA.

Description of drawings

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

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 haoHAO number	The components and parts title	Leading indicator	Quantity	Remarks
					IC1	LM317T or LM338	TO-220 or TO-3 encapsulation	1	Positive polarity output
VT1～VT4	NPN transistor	2SC9013、β≥160	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

Circuit production main points, circuit debugging and method for using

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

When using three end adjustable voltage-regulating ic pieces (LM317T), do not need to install additional in addition radiator;

Predetermined value Vout: the resistance of adjustment potentiometer RP, making three end adjustable voltage-regulating ic pieces (LM317T) output predetermined value Vout is 2.25V;

Remember remaining electric weight for eliminating rechargeable battery, should carry out the standard discharge by specification requirement, 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 this charger design has the automatic stopping circuit of being full of, and can effectively prevent overcharge and damages rechargeable battery;

This charger can be 1～4 joint NI-G or nickel-hydrogen chargeable cell charges respectively;

This charger charging interval was controlled at 16～18 hours, under little current conditions, charged, and help to fill rechargeable battery fuller, and rechargeable battery was difficult for heating, can damage rechargeable battery;

Rechargeable battery is older or poor-performing, and the charging interval needs according to circumstances suitably to increase a little times.

Claims

1. general NI-G nickel-hydrogen chargeable cell charger, it comprises 12V DC power supply, voltage stabilizing circuit, 4 groups of charge circuits and 4 groups of charging indications, it is characterized in that:

Voltage stabilizing circuit is made up of the adjustable integrated package of pressure-stabilizing IC1 of three ends, resistance R 1 and potentiometer RP; The anodal VCC of input (the 3rd pin) connection circuit of three ends are adjustable integrated package of pressure-stabilizing IC1; The end of output end of pressure-stabilizing (the 2nd pin) the connecting resistance R1 of three ends are adjustable integrated package of pressure-stabilizing IC1; The adjustment end (the 1st 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 charging indication thereof in 4 groups of charge circuits and the 4 groups of charging indications 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 (the 2nd pin) of the adjustable integrated package of pressure-stabilizing IC1 of another termination three ends of resistance R 2; The negative pole of the collector series connection resistance R 3 back sending and receiving optical diode LED1 of NPN transistor VT1; The anodal VCC of the anodal connection circuit of LED 1, the emitter of NPN transistor VT1 connects the positive terminal of rechargeable battery, and circuit ground GND connects the negative terminal of rechargeable battery;

2. according to right 1 described general NI-G nickel-hydrogen chargeable cell charger, it is characterized in that: the anodal VCC of 12V dc power anode connection circuit, the 12V dc power cathode links to each other with circuit ground GND.