CN2289337Y

CN2289337Y - Multifunctional charger

Info

Publication number: CN2289337Y
Application number: CN 96250884
Authority: CN
Inventors: 董彦明
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-12-24
Filing date: 1996-12-24
Publication date: 1998-08-26
Anticipated expiration: 2006-12-24

Abstract

The utility model relates to a multifunctional charger, belonging to an arrangement for charging for a battery. A transformer arrives at a bridge road through a switch and realizes the charging for a lead-acid battery; the transformer can arrives at the other bridge road through the switch; one end of the bridge road is connected with an output end through an integrated block; the other end can be respectively connected with a plurality of resistances connected in series with a negative end through the switches; the select for voltage stabilization output can be realized. An output end of the integrated block can charge for an alkaline battery through a endand a negative end; the output of the integrated block can charge for a nickel-cadmium battery through another end and another negative end. When alternating current does not exist, the connected storage battery can be used as a current supply; the utility model collects the functions various battery charging, adjustable direct current, voltage stabilization the current supply into the integration.

Description

Multifunctional charger

The utility model belongs to battery charger.

In existing charger, big multi-charger has weak point in various degree.For lead acid batteries charger, its circuit just adopts a kind of transformer of fixedly output voltage to add rectifier diode, it can only fill a kind of storage battery of rated voltage, make the function of transformer fail to be not fully exerted, lack flexibility in actual applications, the D.C. regulated power supply that has can only be exported a kind of direct voltage, and the adjustable D.C. regulated power supply that has adopts diode rectification to add electrochemical capacitor filtering mostly, does not have voltage stabilizing function.Because the transformer efficiency of this electric appliances is little, output voltage values is subjected to the influence of load current big, so, when certain load current, its output voltage still can be near desirable value, when zero load, its output voltage will rise to 1.5 times of nominal value even more than several times, causes the damage of electrical equipment easily.For Ni-Cd battery charger, mostly can only charge the battery, do not having can not directly to drive electrical appliance work under the situation of alternating current, though what have has a rectification terminal, also just export rectification filtering power, can not voltage stabilizing, can not carry out adjustable voltage stabilizing conversion to drive electrical appliance work.The charger circuit that also has now is more perfect, better performances, but function singleness can not satisfy the chargeable battery of regular size kind and the needs of electrical appliance, can not utilize storage battery to do power supply when no alternating current, realizes its function.

The purpose of this utility model will provide a kind of collection lead acid accumulator exactly, nickel-cadmium cell, and the adjustable direct current of alkaline battery charge function, voltage stabilizing, power supply function are in the multifunctional charger of one.

The utility model has adopted than rational structure on circuit design.1, power unit: form by transformer, fuse, power supply indication; mains switch K1 is a master switch; selector switch K2 is used for selecting the output voltage 7V or the 14V of transformer; when the following voltage of needs 6V; just select transformer 7V voltage; can save electric energy over half, fuse F1, F2 are to former limit, the secondary duplicate protection of transformer, and light-emitting diode is used to refer to power supply.2, rectifying and wave-filtering and charging output: mainly be to be used for circuit to lead acid battery charge, be constituted by a diode bridge circuit, be provided with charging option switch K3 above, can select the charging of all-wave or halfwave rectifier, when selecting half-wave, charging rate (electric current) can be reduced half, in case charging current is excessive, and be provided with current-limiting resistance R2, prevent the integrated package LM317 vibration on the circuit of back and the capacitor C 2 of establishing, when no alternating current, because the effect of diode V7, the storage battery that is connected on its output can directly be supplied with the circuit working of back automatically as power supply.3, adjustable voltage stabilizing output: mainly by integrated package LM317, K switch 4; composition such as resistance, diode; integrated package LM317 cooperates a plurality of resistance and voltage stabilizing output K switch 4 to form 6 grades of adjustable voltage stabilizing circuits; 6 grades of voltages are respectively: 1.5V, 3V, 4.5V, 6V, 9V, 12V, second tube sheet shield, and the back-pressure ability is low to cause damage because of bearing can to avoid integrated package LM317.4, alkaline battery and nickel-cadmium cell charging output: on the basis of adjustable stabilized voltage supply, add current limliting, the amplitude limiter circuit formed by resistance R 10, R11, R12, as calculated, the sort circuit structure, making the external output characteristic of 9 pairs one (bearing) ends of terminal can equivalence be that an internal resistance is 6.2 Ω, electromotive force is the DC power supply of stabilized voltage power supply output valve, with realization alkaline battery is charged; Equally, terminal 10 pairs (bearing) end can equivalence be 5.58 Ω for internal resistance, and electromotive force is the DC power supply of 0.9 times of stabilized voltage power supply output valve, with to the nickel-cadmium cell charging, when battery is approaching when being full of, changes trickle charge automatically over to, can not cause to overcharge and damage battery.

The utility model adopts the sort circuit structure, can be to 6V, 12V lead acid battery charge, and have and fill soon and two kinds of charging rates of trickle charge, maximum charging current can reach 2A, 6 grades of adjustable stabilized voltage supplies, and electric current can reach 1.5A; Alkalescence and nickel-cadmium cell are carried out the charging of current limliting amplitude limit, do not overcharge, can use the storage battery of access as power supply during no alternating current.

Fig. 1 is a circuit diagram of the present utility model

As shown in the figure, transformer T links on the full-bridge of being made up of diode V2, V3, V4, V5 between the terminal 2,1 by voltage-selected switch K2, and K switch 3 is located on the bridge circuit, links output 5 through resistance R 2; On the former limit of transformer T, secondary, be connected to fuse F1, F2 respectively, and, form display circuit by diode V0, V1 and therebetween resistance R 1 behind the transformer T, formed the charging circuit of lead acid accumulator.Output 5 forms a kind of output with an end that connects on bridge circuit.Another road, transformer T is by voltage-selected switch K2, through the full-bridge of forming by diode V6, V4, V5, V8, link terminal 6, an end, when no alternating current, storage battery is as power supply, and its voltage is delivered to terminal 6, an end automatically through diode V7, between bridge circuit and the terminal 6: be connected with filter capacitor C1, prevent the capacitor C 2 that back integrated package LM317 vibrates; The input termination of integrated package LM317 is from terminal 6, and 8 of its reference edge 7 and lead-out terminals are connected with sampling resistor R3, and reference edge 7 is through K switch 4, respectively with meet 6 resistance R 4, R5, R6, R7, R8, R9 between an end, connecting and link to each other; In the front and back of integrated package LM317, be connected to diode V9, V10 respectively, to its anti-pressure protection.The output 8 of integrated package LM317 arrives terminal 9 through resistance R 10, forms alkaline battery charging lead-out terminal with an end, is connected with filter capacitor C3 between an output 8 and an end; Between 8 pairs one ends of the output of integrated package LM317 resistance R 11, R12 are arranged, an output 10 between resistance R 11, R12 and an end form nickel-cadmium cell charging lead-out terminal.

The entire circuit components and parts are put into the shell of 122 * a 102 * 125MM.

Claims

1, multifunctional charger, form by power supply, transformer, mains switch, it is characterized in that: transformer (T) is through switch (K2), link on the full-bridge of forming by diode (V2, V3, V4, V5) between the terminal (2,1), bridge circuit is provided with switch (K3), links output (5) through resistance (R2).

2, according to the said multifunctional charger of claim 1, it is characterized in that: transformer (T) is through switch (K2), through the full-bridge of forming by diode (V6, V4, V5, V8), link on terminal (6) one ends, between terminal (6) one ends diode (V7) is arranged, integrated package (LM317) connects from terminal (6), and its reference edge (7) is linked output (8) through resistance (R3), reference edge (7) through switch (K4) respectively with connect the plural resistance of between an end, connecting and link to each other.

3, according to the said multifunctional charger of claim 2, it is characterized in that: the output (8) of integrated package (LM317), through resistance (R10), link terminal (9), form one group of lead-out terminal with an end.

4, according to the said multifunctional charger of claim 2, it is characterized in that: between the output (8) and an end of integrated package (LM317), be connected with resistance (R11, R12), a lead-out terminal and an end between the resistance (R11, R12) form one group of lead-out terminal.