CN201029210Y

CN201029210Y - Battery charging device

Info

Publication number: CN201029210Y
Application number: CNU2007200338155U
Authority: CN
Inventors: 闵永明
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-01-24
Filing date: 2007-01-24
Publication date: 2008-02-27
Anticipated expiration: 2017-01-24

Abstract

The utility model relates to a battery cell charging device, comprising a switching power supply circuit and a charging testing circuit which is used for detecting the charging state of the charging battery cell, moreover, the utility model also comprises a delay switch circuit which is arranged between the switching power supply circuit and the charging battery cell, the output end of the delay switch circuit is electrically connected with the alternating current, and one end of the charging testing circuit is electrically connected with the input end of the delay switch circuit; when the charging battery cell has a saturated charge, a control signal output by the charging testing circuit triggers the delay switch circuit to cut off the AC electric supply, thereby saving electricity, and effectively protecting the service time of the battery cell.

Description

A kind of storage battery charging device

Technical field

The utility model relates to a kind of storage battery charging device, particularly the storage battery charging device that the storage battery of electric motor car is charged.

Background technology

Existing storage battery charging device, comprise switching power circuit, the charging testing circuit, switching power circuit comprises rectification circuit and transformer circuit, when this storage battery charging device work, connect AC power (being generally the civil power of 220V), the alternating current input rectification circuit, output DC enters transformer circuit after the rectification circuit rectification, transformer circuit is converted to square-wave voltage with direct current, square-wave voltage offers charging battery jar through output dc voltage one tunnel behind the rectifying and wave-filtering and charges, one the tunnel offers the working power of charging testing circuit as this charging testing circuit, charging battery jar has an output simultaneously and is connected with an input of charging testing circuit, therefore, the charging testing circuit detects the charged state of charging battery jar in the process that charging battery jar charges, this charging battery jar has two states in the process of charging, be large current charge state and trickle charge state, this state shows by being provided with the status display circuit that is electrically connected with the testing circuit that charges, promptly when charging battery jar is in the large current charge state, represent with red light is bright, when charging battery jar is in the trickle charge state, represent with green light is bright, electric current when flow into the charging testing circuit from charging battery jar is little during to certain value, the charging testing circuit is exported a signal feedback makes the output voltage of transformer reduce to transformer circuit, thereby reduce to be input to the voltage in the charging battery jar, this moment, green light brightened, but storage battery still is in the state of being recharged in such cases, thereby after green light is bright, often, people cause storage battery to be overcharged charger and AC power disconnection after one and a half hours to two hours because having forgotten, long-term such state can shorten the useful life of storage battery greatly, and wastes energy.

Summary of the invention

Thereby the utility model purpose is to provide a kind of charging battery jar that can prevent to overcharge the storage battery charging device of energy savings in order to overcome the deficiencies in the prior art.

For achieving the above object, the technical solution adopted in the utility model is: a kind of storage battery charging device comprises: it is that direct current charges to charging battery jar that switching power circuit, described switching power circuit are used for the AC power rectifier transformer; The charging testing circuit, described charging testing circuit has a plurality of inputs and a plurality of output, the output of one of them input and described switching power circuit is electrically connected, another input and described charging battery jar are electrically connected, an output of described charging testing circuit feeds back to the feedback input end of described switching power circuit, and described charging testing circuit is used to detect the charged state of described charging battery jar; Be in series with delay switch circuit between described switching power circuit and the described charging battery jar, the output of described delay switch circuit and described AC power are electrically connected, another output of described charging testing circuit and the input of described delay switch circuit are electrically connected, when described charging battery jar charges when saturated, described charging testing circuit is exported a control signal and is triggered described delay switch circuit and cut off AC power.

The relay that has an output switch at least that described delay switch circuit comprises timer, is electrically connected with the output of described timer, the output switch of described relay are used to control being connected of described storage battery charging device and described AC power.

Described storage battery charging device also is provided with start button, and described start button is used for one pulse ac electricity being provided and making the output switch adhesive of described relay and be conducted with described AC power to described relay power supply to described switching power circuit.

Described relay comprises two output switches, and described another output switch and described charging battery jar are electrically connected.

Between described charging testing circuit and described timer, be electrically connected with the second photoelectricity coupling circuit.

Be connected with the status display circuit that is used to trigger the described second photoelectricity coupling circuit work between described charging testing circuit and the described second photoelectricity coupling circuit.

Because technique scheme utilization; the utility model compared with prior art has following advantage: owing to be in series with delay switch circuit between switching power circuit and the charging battery jar; the output and the AC power of delay switch circuit are electrically connected; when charging battery jar charges when saturated; delay switch circuit can cut off and being connected of AC power; even thereby charging battery jar also is placed on this storage battery charging device; but charging device disconnects with AC power; no longer storage battery is charged; thereby saved electricity consumption, and effectively protected the useful life of storage battery.

Description of drawings

Accompanying drawing 1 is the electric theory diagram of the utility model storage battery charging device;

Accompanying drawing 2 is the electric theory diagram after the refinement of the utility model storage battery charging device;

Accompanying drawing 3 is a storage battery charging device schematic diagram of the present utility model;

Wherein: 1, switching power circuit; 2, charging testing circuit; 3, charging battery jar; 4, delay switch circuit; 5, rectification circuit; 6, transformer circuit; 7, status display circuit; 8, the first photoelectricity coupling circuit; 9, the second photoelectricity coupling circuit; 10, timer; 11, relay; 12, AC power; 13, start button;

Embodiment

Below in conjunction with accompanying drawing, describe particular content of the present utility model in detail for example:

Storage battery charging device as shown in Figures 1 and 2, comprise switching power circuit 1, charging testing circuit 2 and the delay switch circuit 4 that is connected with 1 two outputs of switching power circuit respectively, this switching power circuit 1 comprises rectification circuit 5, transformer circuit 6, delay switch circuit 4 comprises timer 10, the relay 11 that is connected with the output of timer 10, the storage battery charging device also comprises the status display circuit 7 that is electrically connected with charging testing circuit 2, this status display circuit 7 is electrically connected by the second photoelectricity coupling circuit 9 and timer 10, thereby and an output of charging testing circuit 2 feed back to the size that transformer circuit 6 is adjusted the output voltage of transformer circuits by the first photoelectricity coupling circuit 8.

Charging battery jar 3 has two kinds of charged states in charging, be large current charge state and trickle charge state, this two states can be represented by status display circuit 7, status display circuit 7 is provided with the red green two color light-emitting diode, when charging battery jar 3 is in the large current charge state, thereby red light-emitting diode is switched on and sends ruddiness, and when charging battery jar 4 is in the low current charge state, thereby green light-emitting diode is switched on and sends green glow.

Relay 11 in the delay switch circuit 4 comprises two output switches; an output switch links to each other with AC power 12; an output switch is connected with charging battery jar 3; when the green LED in the status display circuit 7 sends green glow; trigger 9 conductings of the second photoelectricity coupling circuit; thereby make timer 10 pick up counting; if the timer timing is two hours; export a control signal after full two hours when the timer meter and give relay 11; two output switches of relay 11 disconnect; thereby the one, cut off being connected of storage battery charging device and AC power; another is to have cut off being connected of charging battery jar 3 and this storage battery charging device, has not only protected charging battery jar but also saved the energy.

Storage battery charging device of the present utility model also is provided with start button 13 simultaneously, start button 13 is used for providing pulse ac electricity and 10 power supplies make the output switch adhesive of relay 10 and be conducted with AC power 12 to relay to switching power circuit 1, thereby the storage battery charging device is in the operating state to the charging battery jar charging.

Accompanying drawing 3 is the physical circuit figure of a most preferred embodiment of the present utility model, this contactor power circuit 1 and charging testing circuit 2 utilize UC3842 to drive the single tube Switching Power Supply of field effect transistor, cooperate the LM358 double operational that charging battery jar 7 is charged, now describe the operation principle of circuit in detail:

After pressing start button 13, unclamp immediately, after become the direct current of 300V after the C2 filtering, this direct current is the U1 power supply through R11 to AC power 12 (civil power 220V) through two-way anti-interference stream ripple device T2 and bridge rectifier D1-D4 rectification.U1 is the UC3842 pulsewidth modulated intergrated circuit, its output pulse signal directly drives field effect transistor Q1, thereby make the elementary winding of high frequency transformer T1 that the 300V direct current is converted to square wave, square wave is given secondary two windings through electromagnetic coupled, one group of wherein secondary low pressure is behind D6 rectification, C9 stream ripple, begin power supply for U1, secondary another group low pressure one the tunnel is charging testing circuit 2 power supplies that U2 and U3 form behind main rectification D7 and C11 stream ripple, the timer circuit power supply that another road R36 forms for relay J and U5.Two output switches that relay has, wherein, an output switch J1 control AC power, another output switch J2 control charging battery jar, through R38, C14 powers to relay, make relay conducting adhesive, at this moment, the closed alternating current of connecting of output switch J1 is powered continuously, the closed beginning of J2 simultaneously is to the charging battery jar charging, and the red light among the light-emitting diode group DL2 in the status display circuit 7 is bright, and be large current charge this moment, U3 adopts the LM385 integrated chip in the utility model, and LM358 inside includes two independently, high-gain, the dual operational amplifier of internal frequency compensation.

Along with the voltage in the storage battery is increasing, the U3 output signal makes green LED bright, thereby enter the trickle charge state, at this moment, be connected on the photoelectrical coupler U4 conducting in the green light loop, thereby the conducting of Q5 base stage is powered to U5 then, U5 adopts the CD4541 integrated chip, it is 14 pin dual inline type Plastic Package forms, its inside is mainly by oscillator, two-divider, reset circuit, counter, U5 powers to such an extent that beginning is regularly after the electric zero clearing by Q5, and output low level, when timing after 2 hours, U5 exports high level, this high level is through R42, after the R43 dividing potential drop with voltage stabilizing didoe Z3 conducting, thereby one-way SCR diode Q6 conducting, make relay J 1, J2 disconnects, thereby civil power and charging battery jar all are disconnected, thereby effectively prevents overcharging of charging battery jar, prolonged the useful life of storage battery, and saved electric energy, simultaneously, this storage battery charging device circuit structure is simple, components and parts all are common devices, price is lower, thereby makes that the cost of whole storage battery charging device is lower, and market prospects are arranged very much.

Claims

1. storage battery charging device comprises:

It is that direct current charges for charging battery jar (3) that switching power circuit (1), described switching power circuit (1) are used for AC power (12) rectifier transformer;

Charging testing circuit (2), described charging testing circuit (2) has a plurality of inputs and a plurality of output, the output of one of them input and described switching power circuit (1) is electrically connected, another input and described charging battery jar (3) are electrically connected, an output of described charging testing circuit (2) feeds back to the feedback input end of described switching power circuit (1), and described charging testing circuit (2) is used to detect the charged state of described charging battery jar (3);

It is characterized in that: be in series with delay switch circuit (4) between described switching power circuit (1) and the described charging battery jar (3), the output of described delay switch circuit (4) and described AC power (12) are electrically connected, the input of another output of described charging testing circuit (2) and described delay switch circuit (4) is electrically connected, when described charging battery jar (3) charges when saturated, described charging testing circuit (2) output one control signal triggers described delay switch circuit (4) and cuts off AC power (12).

2. a kind of storage battery charging device according to claim 1, it is characterized in that: the relay that has an output switch at least (11) that described delay switch circuit (4) comprises timer (10), is electrically connected with the output of described timer (10), the output switch of described relay (10) are used to control being connected of described storage battery charging device and described AC power (12).

3. a kind of storage battery charging device according to claim 2, it is characterized in that: described storage battery charging device also is provided with start button (13), and described start button (13) is used for providing pulse ac electricity and power supply makes the output switch adhesive of described relay (10) and be conducted with described AC power (12) to described relay (10) to described switching power circuit (1).

4. a kind of storage battery charging device according to claim 2 is characterized in that: described relay (11) comprises two output switches, and described another output switch and described charging battery jar (3) are electrically connected.

5. a kind of storage battery charging device according to claim 2 is characterized in that: be electrically connected with the second photoelectricity coupling circuit (9) between described charging testing circuit (2) and described timer (10).

6. a kind of storage battery charging device according to claim 5 is characterized in that: be connected with the status display circuit (7) that is used to trigger the described second photoelectricity coupling circuit (9) work between described charging testing circuit (2) and the described second photoelectricity coupling circuit (9).