CN2824403Y

CN2824403Y - Temp controlled automatic charger with three colour LED

Info

Publication number: CN2824403Y
Application number: CN 200520046231
Authority: CN
Inventors: 宋嘉鸿
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-03
Filing date: 2005-11-03
Publication date: 2006-10-04
Anticipated expiration: 2015-11-03

Abstract

The utility model discloses a temperature controlled automatic charger with three-colour LED indication, which is designed on the basis of the discharging and charging characteristic curves of a nickel-cadmium battery and a nickel-hydrogen battery. The temperature controlled automatic charger controls a triode series connected type discharging and charging circuit by adopting an R-S trigger composed of a double operational amplifier; when the output end of the R-S trigger is at a high level, the discharging and charging circuit is in a discharging state, when the output end of the R-S trigger is at a low level, the discharging and charging circuit is in a charging state. A triode series connected type charging and trickle charging circuit is controlled by the other R-S trigger composed of a double operational amplifier; when the output end of the R-S trigger is at a high level, the charging and trickle charging circuit is in a normally charging state, when the output end of the R-S trigger is at a low level, the charging and trickle charging circuit is in a trickle charging state. Meanwhile, a red, green and yellow three-colour LED indicates three operating conditions that a battery is discharged, the battery is charged, and the battery is nearly charged fully, and the temperature controlled automatic charger carries out automatic changeover. A built-in discharger is provided with a 2.0V reference voltage (two batteries are connected in series.), and ensures the batteries are discharged until the voltage of the batteries reaches 2.0V, thereby, the temperature controlled automatic charger can be also used as a battery capacity measuring device, and be used for testing the battery capacity and distinguishing shoddy batteries.

Description

The automatic charger of Temperature Control Type band three-color LED indication

Affiliated technical field: the utility model relates to a kind of Temperature Control Type automatic charger, especially a kind of automatic charger of Temperature Control Type band three-color LED indication.

Background technology: at present, charger great majority on the market are halfwave rectifier formula charger, the constant current source charger that is that minority is also arranged, these chargers are easily to battery overcharge, must the people during use for taking the time, can't adapt to the on a large scale requirement of battery capacity, simultaneously equal belt discharge functions not from 600MAH～2400MAH, because of nickel-cadmium cell must discharge, so be unfavorable for prolonging battery useful life.

Summary of the invention: in order to overcome the above-mentioned shortcoming that existing charger exists, the utility model designs according to discharge, the charging characteristic curve of rechargable battery, and, carry out " three steps " according to battery request and be discharged to 2.0V termination (two joint series connection) earlier by triode decision discharge and charging current; Change normal charge again over to; Charging to 90% is that the battery surface temperature reaches Celsius 50 when spending, and changes trickle charge again over to, thereby a kind of global function charger of new generation is provided.

The technical scheme that the utility model overcomes the above problems is: adopt the R-S trigger of being made up of a double operational that discharge of triode tandem and charging circuit are controlled, its output is charged state when being discharge condition, low level during for high level; The R-S trigger of being made up of another double operational is controlled charging of triode tandem and trickle charging circuit again, and its output is the trickle charge state when being normal charge state, low level during for high level.Simultaneously, represented battery discharge respectively, charged and near completely being worth three kinds of operating states by red, green, yellow Tricolor LED, and change automatically, it is further perfect to make it product function.

" conversion automatically " in the such scheme of the automatic charger of the utility model Temperature Control Type band three-color LED indication all adopts reference voltage to guarantee, and makes temperature detection by bridge circuit, so reliable operation is active in one's movements.Discharger is 2.0V because of reference voltage is set in the machine, guarantees that battery discharge stops to 2.0V, so but double as battery capacity measuring device be used as the test cell capacity and differentiate pseudo-battery.

The automatic charger of the utility model Temperature Control Type band three-color LED indication has reliable operation, shows characteristics such as eye-catching, easy to use.

Describe in further detail below in conjunction with accompanying drawing and example automatic charger the indication of the utility model Temperature Control Type band three-color LED.

Description of drawings: Fig. 1 is the electrical schematic diagram of the automatic charger of the utility model Temperature Control Type band three-color LED indication.

Referring to the automatic charger of Fig. 1 the utility model Temperature Control Type band three-color LED indication, it comprises discharge module " 1 " (include the trigger that a double operational is formed, its principle can be checked and verify with the novel patent No. 022165851); By triode VT ₁And VT ₂Compound be the Darlington triode and with triode VT ₃Form tandem charging and trickle charging circuit, wherein LED ₂Be normal charge indication, LED ₃Be the trickle charge indication; By double operational A ₁And A ₂And diode VD ₃The R-S trigger control circuit of forming; By three terminal regulator IC ₁The reference source circuit of forming; And by resistance R ₉And R ₁₀, resistance R ₁₁And R ₁₂The electric bridge temperature control circuit of forming below is described one by one to each part mentioned above.

Embodiment: input power supply+7V and triode VT ₁Emitter, resistance R ₅One end, amplifier A ₁The 8th pin, pressurizer IC ₁The 3rd pin connects.Discharge module " 1 " the 1st pin connecting resistance R ₁One end, R ₁Another termination triode VT ₂Base stage; Module " 1 " the 2nd pin and bridge circuit are by resistance R ₁₁And R ₁₂Dividing point connects; Module " 1 " the 3rd pin meets button S ₁Upper end, button S ₁Lower end ground connection; Module " 1 " the 4th pin sending and receiving optical diode LED ₁Anode, LED ₁Minus earth; Module " 1 " the 5th pin and battery E _CThe anodal connection.Triode VT ₁Base stage and triode VT ₂Emitter connects; VT ₁Collector electrode and resistance R ₃One end, LED ₂Anode connects; Triode VT ₂Collector electrode and resistance R ₂One end connects, R ₂Other end ground connection.Triode VT ₃Collector electrode and resistance R ₃The other end, LED ₂Negative electrode connect simultaneously connecting resistance R again ₄An end; VT ₃Base stage and resistance R ₅The other end, diode VD ₁The anodal connection; VT ₁Emitter and LED ₃Negative electrode connect and to meet battery E simultaneously _CAnodal.Diode VD ₁With VD ₂Series connection, VD ₂Negative pole and amplifier A ₁The 5th pin and amplifier A ₂The 1st pin connect; Amplifier A ₁The 7th pin meets diode VD ₃Negative pole; Amplifier A ₁The 6th pin and amplifier A ₂The 2nd pin connect and with bridge resistance, R ₁₁And R ₁₂Dividing point connects; Diode VD ₃Positive pole meets amplifier A ₂The 3rd pin while and resistance R ₈One end and capacitor C ₂One end connects, resistance R ₈Another termination bridge resistance, R ₉Dividing point with R10.Pressurizer IC ₁The 1st pin and resistance R ₆One end, R ₇One end connects; Resistance R ₆Other end ground connection, R ₇Another termination pressurizer IC ₁The 2nd pin connects capacitor C simultaneously ₁Anodal, resistance R ₉And R ₁₁An end; Capacitor C ₁Minus earth, bridge resistance, R ₁₀And R ₁₂Other end ground connection.Amplifier A ₂The 4th pin ground connection, battery E _CMinus earth, capacitor C ₂Other end ground connection.

Described amplifier A ₁With A ₂The R-S circuit of forming can adopt the four-operational amplifier of LM358 double operational for example or LM324.

Described IC ₁Reference source circuit can adopt the LM317 three terminal integrated voltage stabilizer.

Next the automatic charger course of work of the utility model Temperature Control Type band three-color LED indication is described:

Charging current E _CThe battery compartment of packing into clicks push-button switch S ₁At this moment, discharge module " 1 " begins discharge, simultaneously LED ₁Red light emitting diodes is lighted, and indication circuit enters discharge condition.As battery E _CWhen discharge was brought down below 2.0V, the upset discharge of inner road ended LED ₁Also extinguish.At this moment, resistance R ₁Connect low level, VT ₁With VT ₂The conducting of Darlington switch triode, also conducting of trickle triode simultaneously, power supply is through R ₃To battery E _CCharging, LED at this moment ₂Green LED is lighted, and indication circuit enters charged state automatically.Charge to the battery surface temperature always and reach Celsius 50 when spending, because thermistor R ₁₀Effect, by resistance R ₉And R ₁₀, R ₁₁And R ₁₂Bridge circuit disequilibrium and forcing by amplifier A ₁With A ₂The R-S trigger upset amplifier A that forms ₂Output becomes low level by high level, triode VT ₃End, charging current is through R ₄With LED ₃Conversion is into about the trickle charge of 20MA.At this moment, LED ₃Yellow light-emitting diode is lighted, and indication circuit enters the trickle charge state automatically.

The above only is an example of the automatic charger of the utility model Temperature Control Type band three-color LED indication, also can change circuit such as R-S trigger such as NE555 according to above design principle, or the charger etc. of belt discharge does not all belong to scope of the present utility model.

Claims

1, a kind of automatic charger of Temperature Control Type band three-color LED indication, it comprises by triode VT ₁And VT ₂Compound be the Darlington triode and with triode VT ₃Form tandem charging and trickle charging circuit, wherein LED ₂Be normal charge indication, LED ₃Be the trickle charge indication; By double operational A ₁And A ₂And diode VD ₃The R-S trigger control circuit of forming; By three terminal regulator IC ₁The reference source circuit of forming; And by resistance R ₉And R ₁₀, resistance R ₁₁And R ₁₂The electric bridge temperature control circuit of forming is characterized in that: amplifier A ₁The 6th pin and amplifier A ₂The 2nd pin connect and with bridge resistance, R ₁₁And R ₁₂Dividing point connects; Diode VD ₃Positive pole meets amplifier A ₂The 3rd pin while and resistance R ₈One end and capacitor C ₂One end connects; Resistance R ₈Another termination bridge resistance, R ₉And R ₁₀Dividing point.

2, the automatic charger of Temperature Control Type band three-color LED indication as claimed in claim 1 is characterized in that: described resistance R ₉And R ₁₀, resistance R ₁₁And R ₁₂The electric bridge temperature control circuit of forming, wherein resistance R ₁₀Be thermistor.