CN2158591Y - Arrangement for charging Ni-Cd battery with alarm - Google Patents

Abstract

The utility model relates to a charger which is controlled by an electronic switch with a function of acoustic-optic alarm for the overcharge of a Ni-Cd battery and can be controlled by an electronic switch, which is an electronic switch comprising an insulating casing, a power supply transformer, a rectification circuit, a transistor, an integrated circuit for a high speed switch, a music integrated circuit and relative elements; the charging can be carried out through that the transistor switches on a charging circuit; when the charging is completed, the turnover of the integrated circuit for a high speed switch can be controlled through the variation of the galvanic potential of a resistance; the transistor is forced to stop for cutting off the charging circuit. Simultaneously, an acoustic-optic alarm can send out alarm signal; the work is safe; the structure is simple; the cost is low.

Description

Arrangement for charging Ni-Cd battery with alarm

The utility model belongs to a kind of nickel-cadmium cell is charged also can send the device of the sound and light alarm signal that overcharges automatically.

Nickel-cadmium cell under normal circumstances can discharge and recharge more than 800 times, and it is very economical using in household electrical appliance.The charger construction of Chu Shouing is simple in the market, function singleness, its typical structure is that the 220V alternating voltage becomes dc low-voltage through the transformation rectification circuit, charge to nickel-cadmium cell, charging interval is not wait by 16 hours in 3 hours, existing charger has only the charging indication, noiseless visual alarm when sufficient, nickel-cadmium cell whether can only roughly estimate by full charge, that is to say that the user can only be by virtue of experience voluntarily to controlling conduction time, if inadvertent is not in time cut off the electricity supply, just the accident of can overcharging, cause battery overheated, reduce its useful life, also can blast when serious.

The applicant authorizes utility model patent on March 12nd, 1993 at the nickel-cadmium cell of on August 13rd, the 1992 application warning charger that overcharges, and application number is ZL92230569.2.Though this utility model has solved the function singleness of selling on the above-mentioned market, the defective of no acousto-optic warning charger, the direct voltage after the employing rectification charges to nickel-cadmium cell through the electromagnetic breaker normally-closed contact.Make the high speed switch integrated circuit conducting after the nickel-cadmium cell abundance, provide voltage to relay and music integrated circuit, the charging road is cut off in its normally-closed contact action.Its weak point is that the contact of electromagnetic relay is to make with silver or copper material electroplate, be subjected to its integral surface of air pollution to present one deck blackish green oxide layer for a long time, cause contact resistance to strengthen during adhesive between upper and lower contact, and cause that work is unreliable, useful life, to shorten this be one, it two is because relay costs an arm and a leg product cost to be strengthened, and waste silver or copper material.

The purpose of the utility model development is to provide a kind of electronic switch of being made up of transistor and related elements of packing in insulation shell to control the nickel-cadmium cell sound and light alarm charger that overcharges.To overcome the shortcoming that existing general charger and above-mentioned nickel-cadmium cell overcharge the warning charger.

The utility model adopts following technical scheme to realize: see accompanying drawing 1, it is by power transformer (1) bridge rectifier (2), resistor R 1 is welded on the printed circuit board (3), high speed switch integrated circuit IC1, music integrated circuit IC2, capacitor C1, piezo-electric acoustic generator (4), it is characterized in that: above-mentioned device is packed in the insulation shell (5), the red light emitting diodes D5 of indication overcharges, the green LED D6 of charging indication parallel card respectively is contained in insulation shell (5) loam cake front position place: transistor BG1 on printed circuit board (3) is welded, resistor R 2, R3, the electronic switch that diode D7 and above-mentioned device are formed; When transistor BG1 conducting, can connect charging circuit, charge to nickel-cadmium cell E, potential change by resistor R 2 control high speed switch integrated circuit IC1 when sufficient makes its upset, force transistor BG1 to end immediately, music integrated circuit IC2 work simultaneously, the sound of being controlled by IC2, a kind of nickel-cadmium cell that optical device is reported to the police the synchronously sound and light alarm charger that overcharges.

See accompanying drawing 2, the electronic switch that said and above-mentioned device is formed is that the negative pole of light-emitting diode D6 links to each other with resistor R 2 one ends and transistor BG1 emitter, the other end of resistor R 2 links to each other with high speed switch integrated circuit IC1 the 5th pin, the base stage of transistor BG1 links to each other with resistor R 3 one ends, the other end of resistor R 3 links to each other with diode D7 negative pole, the positive pole of diode D7 with after the positive pole of capacitor C1 links to each other again with high speed switch integrated circuit IC1 the 2nd, 3 pin link to each other, transistor BG1 collector electrode links to each other with the nickel-cadmium cell E that is recharged is anodal, and its negative pole links to each other with the 4th pin of high speed switch integrated circuit IC1.

The parallel diameter that is drilled with is two garden through holes of 3 millimeters at insulation shell (5) loam cake front position place, and insulation shell (5) adopts the ABS engineering plastics to make.

See accompanying drawing 2,3, connect the 220V alternating current and become 6V voltage through power transformer, be direct voltage through bridge rectifier D1～D4 rectification again, provide voltage to make the BG1 conducting by current-limiting resistance R1, light-emitting diode D6 to transistor BG1 emitter, and be recharged battery E and form the loop nickel-cadmium cell E is charged; (its threshold values is 2.8V) is apparent when nickel-cadmium cell E two ends are sufficient, resistor R 2 one terminates to high speed switch integrated circuit IC1 the 5th control pin, its 5 pin current potential also rises thereupon and makes the IC1 upset, this moment IC1 the 2nd, 3 pin current potentials are elevated to 3.8V, by diode D7, resistor R 3 is added to transistor BG1 base stage forces transistor BG1 to end immediately, and the cut-out charging circuit, again by the 2nd of high speed switch integrated circuit IC1,3 pin provide enabling signal to music integrated circuit IC2, the red light emitting diodes D5 that indicated by overcharging of IC2 control is luminous, piezoelectricity sounding sheet sends music alarm sound, the green LED D6 of meanwhile former charging indication extinguishes, thereby informs people's nickel-cadmium cell E full charge.

Capacitor C1 can make the 2nd, the 3 pin voltages of IC1 stable; Sensitive switch K is the usefulness that resets once more.

The utlity model has following advantage:

1, in warning charger that nickel-cadmium cell is overcharged, the electronic switch that employing transistor and related elements are formed is controlled than the electromagnetic switch of selecting for use relay and related elements to form and is cut off charging circuit reliable operation, saving silver, long service life, speed is fast and a transistor is lower more than 10 times than a relay price.

2, this charger case adopts the engineering plastics of high dielectric strength to make, and is safe in utilization; Sound, light are reported to the police sensitive reliable, and the situation that effectively prevents to overcharge takes place, and will not forget the situation of the nickel-cadmium cell E that is damaged because of the user, and simple in structure, easy production.

Accompanying drawing 1 is the utility model assembling schematic diagram: it comprises that 1 is that power transformer, 2 is that bridge rectifier, 3 is that the printed circuit board, 4 that device is housed is that piezoelectricity sounding sheet, 5 is insulation shell (comprising loam cake and base).

Accompanying drawing 2 is the utility model electrical schematic diagram.

Accompanying drawing 3 is the utility model block diagram.

Embodiment:

The model of IC1 is that the model of TWH8778, IC2 is K-414;

Piezoelectricity generation sheet model is HTD; Transistor BG1 should adopt 3CK series;

The resistance of resistor R 1 is that 6.8 Ω, R2 are that 51K Ω, R3 are 1K Ω;

The capacity of capacitor C1 is 100uf/10V;

K is a microswitch

Claims (3)

1, the sound and light alarm charger that overcharges of the nickel-cadmium cell with electronic switch control, it is by be welded on power transformer (1), bridge rectifier (2), the printed circuit board (3) resistor R 1, high speed switch integrated circuit IC1, music integrated circuit IC2, capacitor C1, piezoelectricity sounding sheet (4), it is characterized in that: above-mentioned device is packed in the insulation shell (5), and the green LED D6 of the red light emitting diodes D5 of the indication of overcharging, charging indication parallel card respectively is contained in insulation shell (5) loam cake front position place; Be welded transistor BG1, resistor R 2, R3 on printed circuit board (3), the electronic switch that diode D7 and above-mentioned device are formed; When transistor BG1 conducting, can connect charging circuit, charge to nickel-cadmium cell E; Potential change by resistor R 2 control high speed switch integrated circuit IC1 when sufficient makes its upset, force transistor BG1 to end immediately, music integrated circuit IC2 work simultaneously, the sound of being controlled by IC2, a kind of nickel-cadmium cell that optical device is reported to the police the synchronously sound and light alarm charger that overcharges.

2, according to the described charger of claim 1, it is characterized in that: the electronic switch that said and above-mentioned device is formed is that the negative pole of light-emitting diode D6 links to each other with resistor R 2 one ends and transistor BG1 emitter, the other end of resistor R 2 links to each other the base stage of transistor BG1 and resistor R with high speed switch integrated circuit IC1 the 5th pin ₃One end links to each other, resistor R ₃The other end link to each other with diode D7 negative pole, the positive pole of diode D7 with link to each other with high speed switch integrated circuit IC1 the 2nd, 3 pin again after the positive pole of capacitor C1 links to each other, transistor BG1 collector electrode links to each other with the nickel-cadmium cell E that is recharged is anodal, and its negative pole becomes the 4th pin of IC circuit 1 to link to each other with speed-sensitive switch.

3, according to the described charger of claim 1, it is characterized in that: the parallel diameter that is drilled with is two garden through holes of 3 millimeters at insulation shell (5) loam cake front position place, and insulation shell (5) adopts the ABS engineering plastics to make.

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