CN102694403B - Charger and control method thereof - Google Patents

Abstract

The invention discloses a charger. The charger comprises an electronic switch connected between a charging main circuit and an external power, and an auxiliary power supply for operation of both a monitoring control module and the electronic switch, wherein a self-locking switch module is connected in series between the auxiliary power supply and a charged battery; and the control terminal of the self-locking switch module is connected with the output of the monitoring control module. The control method is that when the charger is not connected with the battery, the electronic switch is switched off and the power consumption is zero; when the charger is connected with the battery, a capacitive self-starting switch in the self-locking switch module is automatically conducted and locked, the auxiliary power supply is powered on; and when the battery is fully charged, the monitoring control module outputs a control signal to the self-locking switch module, the capacitive self-starting switch is switched off, and the auxiliary power supply loses power, and if the battery is not plugged out after being fully charged, the power consumption of the charger is close to zero. The invention achieves the purpose of energy conservation, because when the charged not connected with the battery is kept on the electrified external power in long term, the power consumption is zero and when the battery is fully charged but not plugged out, the power consumption is close to zero, and conforms to the use habit.

Description

A kind of charger and control method thereof

Technical field

The invention belongs to energy-saving charger technical field, more particularly relate to the energy-saving charger utilizing external power supply to charge to battery.

Background technology

At present, energy-saving charger usually adopts between external power supply and the main circuit charged the battery and is connected in series electronic switch, the accessory power supply of the Monitoring and Controlling module work for charging process is directly connected with external power supply, thus achieve charger stand-by power consumption and be less than 0.5W, meet international power conservation requirement, as long as but exist charger access energising external power supply on just have electric energy to consume, and in daily life, in order to charger is usually retained on the external power supply of energising by people easy to use for a long time, thus cause charger all the time all at consume electric energy, in order to overcome above-mentioned defect, some chargers are connected across between external power supply and accessory power supply after using electronic switch manual key in parallel, manually the path of button startup external power supply and accessory power supply is connected, and connect locking by electronic switch, except automatically cutting off the path between external power supply and main circuit after battery is full of, also automatically cut off the path between external power supply and accessory power supply, thus also achieve charger standby zero-power-consumption, but manual key must be operated when external power supply is energized could charge to battery, inconvenient operation, exist when battery charging process peripheral power loss, after incoming call, user is not again at the scene, or user at the scene but forget and again operate manual key, charging cannot be continued to battery, thus cause battery normally not use, such as: during charging battery of electric vehicle, user just usually can not be on-the-spot in charging, number of patent application is that " charger " of 200910000888.8 and " the energy-conservation charger " of 200810304498.5 just there will be the problems referred to above.Could to the defect of battery charging in order to overcome the above-mentioned manual key that must operate, charger manufacturer improves further, use and obtain electric energy from main circuit and rechargeable battery and supply directly to the input of accessory power supply, thus just automatically can complete charging after achieving charger access battery, and end standby zero-power-consumption when connecing battery, but end is transferred to after battery is full of, although charger does not now consume external power supply electric energy, there is the electric energy consuming rechargeable battery.The dial-out of rear end is full of in order to overcome above-mentioned battery charger, and there is the defect consuming rechargeable battery electric energy, charger manufacturer improves again further, according to MCU control unit in Monitoring and Controlling module, the basic circuit rank height such as load monitoring adopt multistage accessory power supply, the input electric energy supply for the accessory power supply of highest-ranking MCU control unit work is only retained after battery is full of, namely the input channel only retained for the accessory power supply of MCU control unit work is connected, the input channel of all the other accessory power supplys is turned off, to reduce when not transfering to after battery is full of charger to the power consumption of rechargeable battery, if but have the input channel of accessory power supply to connect, just there is power consumption in charger, in order to overcome this defect, producer selects the low-power consumption MCU control unit that quiescent current is little in charger as far as possible, if number of patent application is that " charger " of 201010114917.6 and " charger " document of 201110118400.9 are recorded, in order to reduce standby energy consumption, when MCU control unit enters dormancy, the small-power stabilized voltage power supply of powering for MCU control unit is separately only had to have output, the power supply of all the other accessory power supplys is turned off, but how littlely have regardless of the quiescent current of MCU control unit, small-power stabilized voltage power supply has electric current to flow through, although voltage-stabiliser tube is not mainly used to voltage stabilizing in small-power stabilized voltage power supply, and be used to overvoltage protection, and voltage-stabiliser tube output voltage is less than its rated voltage at ordinary times, thus can not certainly fill after having occurred accessing charger when battery remaining power is too low, in order to overcome this defect, employing is set up manual key and is addressed this problem on electronic switch, when can not certainly fill after the too low access charger of battery remaining power, battery charging is realized by operation manual key, the operation of this manual key, from and create operation manual key could to battery charging defect.This-small-power stabilized voltage power supply in the application of voltage-stabiliser tube; should be generally enter overvoltage protection when battery is full of; namely voltage stabilizing state; otherwise when battery access charger will realize in time filling; will greatly improve the residual capacity of battery; so when not transfering to from charger after battery is full of; the energy consumption that charger produces battery is still very large; therefore above-mentioned two inventions, to charger access battery realize from fill be full of with battery after do not transfer to from charger time the standby energy consumption conflict body that produces do not resolve.As everyone knows, the energy of the battery self residual of charging is adopted to provide working power to the circuit controlling charging process in charger, for high capacity cell, the dump energy of battery self enough can meet the requirement of the circuit work power controlling charging process in charger, as the battery of electric motor car.

Supply without the input of rechargeable battery (being equivalent to charging device) to accessory power supply although also have in energy-saving charger prior art, also manual key is not set up, can accomplish access battery after automatic charging, battery is full of the connection of rear automatic cut-out external power supply and charger, realize not consuming the electric energy of external power supply and rechargeable battery (being equivalent to charging device) when charger is standby, but be built-in with battery, exist charger standby time consume the energy of internal battery, as number of patent application be 201010250546.4 " static zero-power-consumption energy-saving charger " just exist charger standby time consume the energy of internal battery, in fact cause charger whenever all at consume electric energy, when charger for a long time need not, also exist when internal battery drops to MCU control unit, during the minimum maintenance electric energy that the basic circuits such as load monitoring need, charger does not access again and carry out energy supplement to internal battery on the external power supply of energising, charger cannot re-use in the future.

Summary of the invention

The object of the invention is the defect existed to overcome prior art, the situation of charger use is departed from (after namely battery charging for battery, user must transfer to the situation of battery from the output of charger, battery as electric motor car), a kind of charger and control method thereof are provided, when charger is retained on the external power supply being connected with electricity, charger end access battery, itself and external power source cut off automatically, and energy consumption is zero; Charger access battery, automatic and external power source is connected, and charges to battery; In charging process during (namely battery charging is carried out) external power source dead electricity, automatic to battery continuation charging after incoming call; After battery is full of, automatically disconnect the connection with external power source, and close the input channel of accessory power supply, charger power consumption is close to zero; No matter whether battery is full of, transfer to after battery from charger, charger energy consumption is zero.

For achieving the above object, the technical scheme taked of the present invention is as follows:

A kind of charger, comprise: charging main circuit and the electronic switch be connected between external power supply, supply the accessory power supply of Monitoring and Controlling module and electronic switch work, described Monitoring and Controlling module comprises and is connected with charging detecting unit, the controller unit of voltage detection unit, the described output of charging main circuit is connected with the battery of charging, the control end of charging main circuit is connected with the output of Monitoring and Controlling module middle controller unit, the input of described accessory power supply is connected with charging main circuit, the output of accessory power supply is connected with the power input of electronic switch, the power input of Monitoring and Controlling module is connected, Self-closing lock switch module is serially connected with between the power input of described accessory power supply and the battery of charging, described Self-closing lock switch module comprises condenser type from opening switch and control circuit, condenser type is connected with the anode of charging from the input of opening switch, the output of condenser type from opening switch and the power input of accessory power supply, the sampling input of voltage detection unit is connected, another of the control end of control circuit and controller unit exports and is connected, the output of control circuit is connected with the controlled end of condenser type from opening switch, obtain the power supply that the working power of control circuit exports from condenser type from opening switch.

The above accessory power supply comprises the first power supply unit and the second power supply unit, the power input of described first power supply unit is connected with the output of condenser type from opening switch, the output of the first power supply unit is connected with the power input of electronic switch, in the power input access charging main circuit of described second power supply unit, the output of the second power supply unit is connected with the power input of Monitoring and Controlling module.

The above accessory power supply also can comprise the first power supply unit and external power supply testing circuit, the power input of described first power supply unit is connected with the output of condenser type from opening switch, the output of the first power supply unit is connected with the power input of electronic switch, the power input of Monitoring and Controlling module is connected, in the sampling input access charging main circuit of described external power supply testing circuit, the output of described external power supply testing circuit is connected with the input of Monitoring and Controlling module middle controller unit, for whether controller unit provides external power supply to have telecommunications to cease.

The above Self-closing lock switch module comprises the first condenser type from opening switch, first control circuit forms, described first condenser type from opening switch by electric capacity C1, resistance R1, resistance R2, triode T1, triode T2 forms, one end of described resistance R1, the emitter of triode T1, be connected with the positive pole of battery by connecting line after the collector electrode of triode T2 is connected with each other, the other end of resistance R1, one end of resistance R2, the output of the positive pole rear access first control circuit connected with each other of electric capacity C1, the negative pole of electric capacity C1 is connected with the negative pole of battery and accesses the ground GND of direct current, the other end of resistance R2 is connected with the base stage of triode T1, the collector electrode of triode T1 is connected with the base stage of triode T2, the emitter of triode T2 accesses the power input of the first power supply unit and voltage detection unit, the control end of first control circuit exports with controller unit and is connected.

The above Self-closing lock switch module also can comprise the second condenser type from opening switch, second control circuit and electric capacity C3, described second condenser type from opening switch by electric capacity C2, resistance R3, resistance R4, controllable silicon VT, and the normally-closed contact switch composition of relay J 1, the positive pole of described electric capacity C2 is connected with the positive pole of battery by connecting line after connecting with one end of the normally-closed contact switch of relay J 1, the other end of the normally-closed contact switch of relay J 1 is connected with the anode of controllable silicon VT, the negative pole of electric capacity C2, one end of resistance R3, one end of resistance R4 is connected with each other, the other end of resistance R3 is connected with the grid of controllable silicon VT, the other end of resistance R4, the negative electrode of controllable silicon VT, positive pole rear access first power supply unit connected with each other of electric capacity C3 and the power input of voltage detection unit, the negative pole of electric capacity C3 is connected with the ground GND of direct current, described second control circuit is made up of the coil of resistance R5, resistance R6, triode T3, relay J 1, the output of one end of resistance R5, one end of resistance R6 rear access controller unit connected with each other, the other end of resistance R5 is connected with the base stage of triode T3, the negative pole of battery and the ground GND of direct current is accessed after the other end of resistance R6 is connected with the emitter of triode T3, the collector electrode of triode T3 is connected with one end of relay J 1 coil, and the other end of relay J 1 coil accesses the power supply that the second condenser type exports from opening switch.

The above first control circuit is by triode T4, T5, T6, T7, resistance R7, R8, R9, R10, R11, R12, R13, electric capacity C4, C5, diode D1 form, and the collector electrode of triode T4 is connected with the positive pole of the first condenser type electric capacity C1 in opening switch, and the emitter of triode T4 is connected with the ground GND of direct current, and the base stage of triode T4 is connected with one end of resistance R7, the other end of resistance R7, one end of resistance R12, one end of resistance R13, the collector electrode of triode T5 is connected with each other, the base stage of triode T5, the positive pole of diode D1, one end of resistance R10, one end of electric capacity C4 is connected with each other, the other end of resistance R12, the base stage of triode T6, the collector electrode of triode T7 is connected with each other, the other end of resistance R10, one end of resistance R11, the emitter of triode T6 is connected with each other, the base stage of triode T7, one end of resistance R8, one end of resistance R9, one end of electric capacity C5 is connected with each other, the other end of electric capacity C4, the other end of electric capacity C5, the other end of resistance R9, the emitter of triode T5, the emitter of triode T6, the ground GND of the emitter rear access direct current connected with each other of triode T7, the other end of resistance R8 is connected with the output of controller unit, the other end of resistance R11, the other end of resistance R13, the power supply that negative pole rear access first condenser type connected with each other of diode D1 exports from opening switch.

The above first control circuit also can by resistance R14, R15, R16, R17, R18, electric capacity C6, C7, triode T8, trigger forms, the collector electrode of described triode T8 is connected with the positive pole of the first condenser type electric capacity C1 in opening switch, the emitter of triode T8 is connected with the ground GND of direct current, the base stage of triode T8 is connected with one end of resistance R14, the other end of resistance R14 is held with the output Q of trigger and is connected, the power end of trigger, one end of resistance R16, one end of resistance R17, the power supply that one end rear access first condenser type connected with each other of resistance R18 exports from opening switch, the set end of trigger is accessed after the other end of resistance R16 is connected with the positive pole of electric capacity C6, the other end of resistance R17 is connected with the clear terminal of trigger, the other end of resistance R18, one end of electric capacity C7, be linked into the output of controller unit after the data input pin of trigger is interconnected, after one end of resistance R15 is connected with trigger clock end, another of access controller unit exports, the other end of electric capacity C6, the other end of electric capacity C7, the other end of resistance R15, the power cathode of trigger is connected with each other to be connected with the ground GND of direct current afterwards.

Described voltage detection unit detects for charging voltage in the battery that charges and charging process.

Described condenser type mainly comprises RC charge-discharge circuit in opening switch, use electric capacity both end voltage can not to suddenly change principle, condenser type is made to open input battery power being incorporated into accessory power supply from opening switch, carry out self-locking again, thus realize automatically completing charging after battery starts to access charger.

For achieving the above object, another technical scheme that the present invention adopts is,

A kind of control method of charger is as follows:

A) battery charging front connection with charger is in off-state;

B), when the connection of battery and charger disconnects, accessory power supply must not be electric, and electronic switch is in off-state, and charger power consumption is zero;

C) battery is linked into the output of charger, and control condenser type in Self-closing lock switch module and connect and locking from opening switch, accessory power supply obtains electric, and electronic switch is connected;

D), when charger is linked into the external power supply of energising, Monitoring and Controlling module is charged to battery by charging main circuit according to battery status;

E) in battery charging process, external power supply dead electricity, after incoming call, continues battery automatic charging;

F) when Monitoring and Controlling module detects that battery is full of, output a control signal to Self-closing lock switch module, condenser type is closed from opening switch, namely the path blockade between battery to accessory power supply, accessory power supply dead electricity, electronic switch disconnects, and the connection of charger and external power supply disconnects, and charger power consumption is close to zero;

G) in battery charging process, transfer to battery, accessory power supply dead electricity, electronic switch disconnects, and the connection of charger and external power supply disconnects.

Beneficial effect:

When the present invention has used battery to start to access charger charging dexterously, in Self-closing lock switch module, condenser type electric capacity both end voltage of RC circuit in opening switch can not be suddenlyd change principle, condenser type is made to open input battery power being incorporated into accessory power supply from opening switch, carry out self-locking again, thus realize automatically completing charging after battery starts to access charger, after battery is full of, Monitoring and Controlling module outputs control signals to control circuit in Self-closing lock switch module, control circuit control capacitance formula is closed from opening switch, accessory power supply dead electricity, electronic switch disconnects.When achieving charger end access battery, electronic switch disconnects, and power consumption is zero; Do not transfer to after battery is full of, charger power consumption, close to zero, now only has leakage current to exist.On the external power supply that access battery in charger end is retained in energising for a long time, power consumption is zero, battery be full of end transfer to power consumption close to zero energy-conservation, and both met the use habit of people, so compared with prior art, power and energy saving and environmental protection, meet use habit more.

Accompanying drawing explanation

Below in conjunction with drawings and embodiments, the invention will be further described.

Fig. 1 is the operating state connection diagram of charger of the present invention;

Fig. 2 is the schematic block diagram of the charging circuit of charger of the present invention;

Fig. 3 is the theory diagram of the first execution mode of accessory power supply in Fig. 2;

Fig. 4 is the theory diagram of the second execution mode of accessory power supply in Fig. 2;

Fig. 5 is the theory diagram of Self-closing lock switch module in Fig. 2;

Fig. 6 is the schematic diagram of the first execution mode of Self-closing lock switch module in Fig. 5;

Fig. 7 is the schematic diagram of the second execution mode of Self-closing lock switch module in Fig. 5;

Fig. 8 is the schematic diagram of the first execution mode of the-control circuit in Fig. 6;

Fig. 9 is the schematic diagram of the second execution mode of the-control circuit in Fig. 6;

Figure 10 is the schematic diagram of the first execution mode of electronic switch in Fig. 2;

Figure 11 is the schematic diagram of the second execution mode of electronic switch in Fig. 2;

In figure: 10. external power supply, 20. batteries, 1000. chargers, 110. electronic switches, 120. charging main circuits, 21. current rectifying and wave filtering circuits, 22. modular converters, 130. Monitoring and Controlling modules, 31. controller units, 32. charging detecting units, 33. voltage detection units, 34. indicating members, 140. accessory power supplys, 41, 42. first, second power supply unit, 43. external power supply testing circuits, 150. Self-closing lock switch modules, 51. condenser types from opening switch, 52. control circuits, 1, 2. first, second control circuit, 3, 4. first, 2nd, condenser type from opening switch, C1, C2, C3, C4, C5, C6, C7. electric capacity, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20. resistance, D1, D2. diode, T1, T2, T3, T4, T5, T6, T7, T8, T9. triode, J1, J2. relay, the ground of GND. direct current, VCC1, VCC2, VCC3. power supply, A. trigger, VT. controllable silicon.

Embodiment

See Fig. 1, the operating state connection diagram of a kind of charger 1000 of the present invention, the input of described charger 1000 is connected with external power supply 10, and the output of charger 1000 is connected with battery 20; Charger 1000 utilizes external power supply 10 to charge to battery 20, after battery 20 is full of electricity, transfers to battery 20 to use, as the battery of electric motor car from the output of charger 1000.

External power supply 10 can be AC power or DC power supply, and in present embodiment, external power supply is AC power, and power source is civil power.

Battery 20 is rechargeable battery, as: Ni-MH battery, lithium battery, lead-acid battery etc. are the lead-acid battery for electric motor car in the present embodiment.

As shown in Figure 2, charger 1000 comprises electronic switch 110, charging main circuit 120, Monitoring and Controlling module 130, accessory power supply 140, Self-closing lock switch module 150, described charging main circuit 120 is made up of current rectifying and wave filtering circuit 21 and modular converter 22, described Monitoring and Controlling module 130 by be connected with charging detecting unit 32, voltage detection unit 33, indicating member 34 controller unit 31 form, between the input that the switch series of described electronic switch 110 is connected on the current rectifying and wave filtering circuit 21 of the main circuit 120 that charges and external power supply 10, the output of current rectifying and wave filtering circuit 21 is connected with the input of modular converter 22, the output of modular converter 22 is connected with the positive pole of the battery 20 of external charging, two of controller unit 31 exports the control end that is linked into modular converter 22, another is linked into the control end of Self-closing lock switch module 150, the output of described accessory power supply 140 and Monitoring and Controlling module 130, electronic switch 110 is connected, the input of accessory power supply 140 is connected with charging main circuit 120, the power input of Self-closing lock switch module 150 is connected with the positive pole of the battery 20 of external charging, the power supply of Self-closing lock switch module 150 export respectively with accessory power supply 140, the input of voltage detection unit 33.

The above Monitoring and Controlling module 130 is mainly used in controlling charging main circuit 120 and charges to battery 20, and battery 20 is full of rear output control signal and cuts off electronic switch 110 and close Self-closing lock switch module 150, Monitoring and Controlling module 130 by be connected with charging detecting unit 32, voltage detection unit 33, indicating member 34 controller unit 31 form.

Controller unit 31 is MCU control unit, it includes A/D interface, watchdog circuit, interruptive port, clock circuit etc., monitoring process is carried out to whole charging process, realize, to charging detecting unit 32, the computing of voltage detection unit 33 input signal detection, exporting control signal and indicator light information according to result.

Charging detecting unit 32 is charging current detecting circuit, and current detecting during for charging to battery, in the present embodiment, testing circuit obtains from the sample resistance that charge circuit is connected in series the A/D port exporting controller unit 31 after charging current to.

Voltage detection unit 33 detects for the charging voltage accessing battery 20 in the voltage of battery 20 after charger 1000 and charging process when battery 20, its detection signal is inputted to controller unit 31, controller unit 31 carries out the magnitude of voltage that computing draws battery 20, and magnitude of voltage during charging; The input of voltage detection unit 33 is connected with the power output end of Self-closing lock switch module 150, the output of voltage detection unit 33 is connected with another A/D port of controller unit 31, in the present embodiment, voltage detection unit 33 adopts electric resistance partial pressure to obtain voltage signal to controller unit 31.

Whether indicating member 34 comprises some light-emitting diodes, and it is luminous or change glow color under the control of controller unit 31, own through being filled for the operating state and battery 20 representing charger 1000.

External power source 10 is converted to the voltage and current being adapted to battery 20 and charging by charging main circuit 120 for specific implementation; Charging main circuit 120 is made up of current rectifying and wave filtering circuit 21 and modular converter 22; When external power source 10 is for exchanging, current rectifying and wave filtering circuit 21 is for AC rectification and filtering, when external power source 10 is direct current, current rectifying and wave filtering circuit 21 is for reversal, modular converter 22 comprises switching power circuit, the modulation of PWM driving pulse and drive amplification circuit etc., and the direct current for being exported by current rectifying and wave filtering circuit 21 converts the voltage and current being adapted to battery 20 and charging to; The output of modular converter 22 is connected with the positive pole of battery 20, and the output of its modular converter 22 has the circuit preventing battery 20 from pouring in down a chimney, and the output as modular converter 22 is connected by the positive pole of diode with battery 20.

Electronic switch 110 is for specifically controlling the connecting and disconnecting of charging main circuit 120 and external power source 10, electronic switch 110 can be relay, triode or other the controlled fixture electronic component for on-off function, in the embodiment of the present invention, adopt with relay for main formation can realize connecting and disconnecting control electronic switch 110, the normally opened contact of relay overstate be connected on charging main circuit 120 and external power source 10 between.

Whether accessory power supply 140 for providing required working power for the basic circuit such as Monitoring and Controlling module 130, electronic switch 110 in charger 1000, and obtains external power source 10 and has the information of electricity to deliver to controller unit 31 in Monitoring and Controlling module 130.

The input of accessory power supply 140 is connected with charging main circuit 120, the power input of Self-closing lock switch module 150 is connected with battery 20 positive pole of charging, the output of Self-closing lock switch module 150 respectively with accessory power supply 140, the input of voltage detection unit 33 is connected, the electric energy that Self-closing lock switch module 150 described in it exports for the electric energy and charging controlling battery 20 is to the supply of accessory power supply 140 and voltage detection unit 33, Self-closing lock switch module 150 has when the battery 20 charged accesses charger 1000, the dump energy of battery 20 makes switch connection in Self-closing lock switch module 150 and self-locking, to accessory power supply 140, voltage detection unit 33 is powered, when Self-closing lock switch module 150 receives the control signal of controller unit 31 output, switch in Self-closing lock switch module 150 cuts out, the electric energy that the electric energy of battery 20 and charging export stops to accessory power supply 140, voltage detection unit 33 supplies.

As shown in Figure 3, first execution mode of accessory power supply 140 of the present invention, accessory power supply 140 is made up of the first power supply unit 41 and the second power supply unit 42, the power input of described first power supply unit 41 is connected with the output of Self-closing lock switch module 150, the power output end of the first power supply unit 41 is connected with the power input of electronic switch 110, the power input of the second power supply unit 42 is connected with charging main circuit 120, and the power output end of the second power supply unit 42 is connected with Monitoring and Controlling module 130 power input.

The above first power supply unit 41 is stabilized voltage power supplys, and select DC/DC switching mode voltage stabilizer, thus the input voltage range reaching response is very wide, the power supply input of the first power supply unit 41 obtains electric energy by Self-closing lock switch module 150 from the output of battery 20 and charging, convert the working power needed for electronic switch 110 to, when the first power supply unit 41 has output, control the switch connection of electronic switch 110, charging main circuit 120 is connected with the path of external power source 10, when the first power supply unit 41 does not export, the switch of electronic switch 110 disconnects, charging main circuit 120 disconnects with the path of external power source 10.

The above second power supply unit 42 is also a stabilized voltage power supply, power supply input exports from the switch of electronic switch 110 electric energy obtaining external power supply 10 late-class circuit, the switch of electronic switch 110 described here exports late-class circuit and refers to that electronic switch 110 exports the circuit between charging main circuit 120 output to, comprise the output switching terminal of electronic switch 110, but do not comprise charging main circuit 120 output, that is the also power supply input of the second power supply unit 42 accesses the output of electronic switch 110 or charges in main circuit 120, second power supply unit 42 is for converting the working power needed for Monitoring and Controlling module 130 to, obtain from charging main circuit 120 in the embodiment of the present invention, as obtained from the output of current rectifying and wave filtering circuit 21, certainly also can obtain from the input of current rectifying and wave filtering circuit 21, namely obtain from the output of electronic switch 110.

When the first power supply unit 41 obtains electric, the switch connection of electronic switch 110, second power supply unit 42 obtains electric, Monitoring and Controlling module 130 is started working, controller unit 31 is according to voltage detection unit 33, charging detecting unit 32 monitoring result, export charging control signal to modular converter 22, modular converter 22 exports the electric current and voltage that are applicable to battery 20 charging, when controller unit 31 is according to voltage detection unit 33, charging detecting unit 32 monitoring result draws battery 20, and oneself is full of, controller unit 31 stops exporting charging control signal to modular converter 22, modular converter 22 stops charging to battery 20, controller unit 31 also outputs control signals to Self-closing lock switch module 150 control end, Self-closing lock switch module 150 closes the input power path of the first power supply unit 41, first power supply unit 41 dead electricity, the switch of electronic switch 110 disconnects, second power supply unit 42 dead electricity, the working power of Monitoring and Controlling module 130 disappears, quit work.

When charger 1000 pairs of batteries 20 are just in charging process, external power supply 10 dead electricity, second power supply unit 42 dead electricity, the working power of Monitoring and Controlling module 130 disappears, quit work, when external power supply 10 is sent a telegram here again, the second power supply unit 42 obtains electric, Monitoring and Controlling module 130 works on, and proceeds charging to battery 20.Certainly also have, when charger 1000 access battery 20 charge time, external power supply 10 is in power failure state, after external power supply 10 is sent a telegram here, the second power supply unit 42 electric, Monitoring and Controlling module 130 works, and charges to battery 20.

As shown in Figure 4, second execution mode of accessory power supply 140 of the present invention, accessory power supply 140 is made up of the first power supply unit 41 and external power supply testing circuit 43, the power input of described first power supply unit 41 is connected with the output of Self-closing lock switch module 150, the output of the first power supply unit 41 is not only connected with the power input of electronic switch 110, also be connected with Monitoring and Controlling module 130 power input, compared with the first execution mode of accessory power supply 140, eliminate the second power supply unit 42, set up external power supply testing circuit 43, the sampling input of external power supply testing circuit 43 is connected with charging main circuit 120, the output of external power supply testing circuit 43 is connected with the interruptive port of Monitoring and Controlling module 130 middle controller unit 31.

The power supply of the above the first power supply unit 41 exports not only for providing the working power needed for electronic switch 110, also simultaneously for providing the working power needed for Monitoring and Controlling module 130, namely provide the working power needed for Monitoring and Controlling module 130 by the second power supply unit 42 in Fig. 3, change and provided by the first power supply unit 41; When the first power supply unit 41 obtains electric, the switch connection of electronic switch 110, Monitoring and Controlling module 130 is started working, when by external power supply testing circuit 43, controller unit 31 detects that external power supply 10 has electricity, then according to voltage detection unit 33, charging detecting unit 32 monitoring result, export charging control signal to modular converter 22, modular converter 22 exports the electric current and voltage that are applicable to battery 20 charging; When by external power supply testing circuit 43, controller unit 31 does not detect that external power supply 10 has electricity, controller unit 31 does not export charging control signal to modular converter 22, and modular converter 22 does not work, and controller unit 31 enters dormancy; When external power supply testing circuit 43 detects that external power supply 10 is sent a telegram here, wake controller unit 31 up, controller unit 31 is according to voltage detection unit 33, charging detecting unit 32 monitoring result, export charging control signal to modular converter 22, modular converter 22 exports the electric current and voltage that are applicable to battery 20 charging; When battery 20 is just in charging process, controller unit 31 detects external power supply 10 dead electricity by external power supply testing circuit 43, and controller unit 31 stops exporting charging control signal to modular converter 22, and controller unit 31 also enters dormancy; When controller unit 31 draws battery 20 according to voltage detection unit 33, charging detecting unit 32 monitoring result, oneself is full of, controller unit 31 stops exporting charging control signal to modular converter 22, modular converter 22 stops charging to battery 20, controller unit 31 also outputs control signals to Self-closing lock switch module 150 control end, Self-closing lock switch module 150 closes the input power path of the first power supply unit 41, first power supply unit 41 dead electricity, the switch of electronic switch 110 disconnects, the working power of Monitoring and Controlling module 130 disappears, and quits work.

The above external power supply testing circuit 43 set up is for when the main circuit 120 that charges is connected with external power supply 10 path by electronic switch 110, detect external power supply 10 and whether have electricity, testing result exports the interruptive port of Monitoring and Controlling module 130 middle controller unit 31 to, the sampling input of external power supply testing circuit 43 from the switch of electronic switch 110 export the power supply that gathers external power supply 10 late-class circuit with or without, the switch of electronic switch 110 described here exports late-class circuit and refers to that electronic switch 110 exports the circuit between charging main circuit 120 output to, comprise the output switching terminal of electronic switch 110, but do not comprise charging main circuit 120 output, that is the input of external power supply testing circuit 43 accesses the output of electronic switch 110 or charges in main circuit 120, obtain from charging main circuit 120 in the embodiment of the present invention, as obtained from the output of current rectifying and wave filtering circuit 21, certainly also can obtain from the input of current rectifying and wave filtering circuit 21, namely obtain from the output of electronic switch 110.Produce interrupt requests when external power supply testing circuit 43 detects and has electricity, otherwise do not interrupt application output.

As shown in Figure 5, Self-closing lock switch module 150 comprises condenser type from opening switch 51 and control circuit 52, described condenser type is connected with battery 20 from the input of opening switch 51, condenser type is connected with the power input of voltage detection unit 33 with the first power supply unit 41 from the output of opening switch 51, condenser type is connected with the output of control circuit 52 from the controlled end of opening switch 51, the control end of control circuit 52 exports with controller unit 31 and is connected, obtain in the power supply that the working power of control circuit 52 is exported from opening switch 51 by condenser type, also just say that the power input VCC of control circuit 52 accesses condenser type from opening switch 51 output, or the output of access the first power supply unit 41.

As shown in Figure 6, first execution mode of Self-closing lock switch module 150, Self-closing lock switch module 150 by the first condenser type from opening switch 3, first control circuit 1 forms, described first condenser type from opening switch 3 by electric capacity C1, resistance R1, resistance R2, triode T1, triode T2 forms, one end of described resistance R1, the emitter of triode T1, be connected by the positive pole of connecting line with battery 20 after the collector electrode of triode T2 is connected with each other, the other end of resistance R1, one end of resistance R2, the output of the positive pole rear access first control circuit 1 connected with each other of electric capacity C1, the negative pole of electric capacity C1 is connected with the negative pole of battery 20 and accesses the ground GND of direct current, the other end of resistance R2 is connected with the base stage of triode T1, the collector electrode of triode T1 is connected with the base stage of triode T2, the emitter of triode T2 accesses the power input of the first power supply unit 41 and voltage detection unit 33, the control end of first control circuit 1 exports with controller unit 31 and is connected.

The above first control circuit 1 is for controlling the discharge and recharge of the first condenser type electric capacity C1 in opening switch 3, its output is switching mode, during closedown output and direct current ground GND between be high resistant, during connection output and direct current ground GND between for conducting, the working power of first control circuit 1 both directly can access the emitter of triode T2, also the power output end of accessible first power supply unit 41.

The above electric capacity C1 and resistance R1 forms capacitance integral circuit, triode T1 and triode T2 forms compound transistor, triode T1 is positive-negative-positive switch triode, and triode T2 is NPN type switch triode, and resistance R2 is the current-limiting resistance for triode T1 base stage, compound transistor is that the electric energy of the electric energy and charging output being specially battery 20 is to the first power supply unit 41, voltage detection unit 33 and first control circuit 1 supply the on-off switch provided, capacitance integral circuit and compound transistor form condenser type delay turn-off switch circuit, when the battery 20 charged accesses charger 1000, the dump energy of battery 20 is charged to electric capacity C1 by resistance R1, because the voltage at electric capacity C1 two ends can not suddenly change, slowly rise from zero, thus control triode T1 and triode T2 saturation conduction by resistance R2, the electric energy of battery 20 delivers to the first power supply unit 41 by compound transistor, voltage detection unit 33, first control circuit 1, first control circuit 1 controls the ground GND conducting of its output and direct current automatically after obtaining working power, electric capacity C1 stops charging, and by the release of first control circuit 1 output, remain zero, compound transistor keeps saturation conduction, thus achieve Self-closing lock switch module 150 and to power on Self-closing lock function, namely when battery 20 accesses charger 1000, the dump energy of battery 20 makes the switch connection of Self-closing lock switch module 150 and self-locking, when first control circuit 1 receives the control signal of controller unit 31, first control circuit 1 closes the ground GND conducting of its output and direct current, high resistant is rendered as between the ground GND of output and direct current, electric capacity C1 starts charging, when voltage on electric capacity C1 reaches triode T1 cut-ff voltage, compound transistor exports and changes cut-off into by saturation conduction, electric energy and the electric energy exported that charges of namely closing battery 20 are the first power supply unit 41, the path that voltage detection unit 33 and first control circuit 1 supply, first power supply unit 41, voltage detection unit 33 and first control circuit 1 dead electricity.After transfering to battery 20 from charger 1000, electric capacity C1 is discharged, and again can access battery 20 and charge, otherwise Self-closing lock switch module 150 powers on Self-closing lock disabler, namely can not from opening compound transistor saturation conduction.

The above first condenser type is the positive pole of electric capacity C1 and the link of resistance R1 and resistance R2 from the controlled end of opening switch 3.

The compound transistor that the above triode T1 and triode T2 is formed is the switch of the first condenser type from opening switch 3, when compound transistor is saturated, i.e. switch connection, then the electric energy of battery 20 and the electric energy of charging output arrive the output of Self-closing lock switch module 150; When compound transistor ends, namely switch cuts out, then the electric energy of battery 20 and the electric energy of charging output do not arrive the output of Self-closing lock switch module 150.

As shown in Figure 7, second execution mode of Self-closing lock switch module 150, Self-closing lock switch module 150 comprises the second condenser type from opening switch 4, second control circuit 2 and electric capacity C3, described second condenser type from opening switch 4 by electric capacity C2, resistance R3, resistance R4, controllable silicon VT, and the normally-closed contact switch composition of relay J 1, be connected by the positive pole of connecting line with battery 20 after the positive pole of described electric capacity C2 connects with one end of the normally-closed contact switch of relay J 1, the other end of the normally-closed contact switch of relay J 1 is connected with the anode of controllable silicon VT, the negative pole of electric capacity C2, one end of resistance R3, one end of resistance R4 is connected with each other, the other end of resistance R3 is connected with the grid of controllable silicon VT, the other end of resistance R4, the negative electrode of controllable silicon VT, positive pole rear access first power supply unit 41 connected with each other of electric capacity C3 and the power input of voltage detection unit 33, the negative pole of electric capacity C3 is connected with the ground GND of direct current, described second control circuit 2 is by resistance R5, resistance R6, triode T3, the coil composition of relay J 1, one end of resistance R5, the output of one end rear access controller unit 31 connected with each other of resistance R6, the other end of resistance R5 is connected with the base stage of triode T3, the negative pole of battery 20 and the ground GND of direct current is accessed after the other end of resistance R6 is connected with the emitter of triode T3, the collector electrode of triode T3 is connected with one end of relay J 1 coil, the other end of relay J 1 coil is connected with power supply VCC1, described power supply VCC1 both directly can access the negative electrode of controllable silicon VT, also the power output end of accessible first power supply unit 41.

The above second condenser type is that the normally-closed contact switch of relay J 1 is connected with the magnetic force of relay J 1 coil from the controlled end of opening switch 4.

In above second control circuit 2, triode T3 is NPN type switch triode, and it is in cut-off at ordinary times, and when only receiving the control signal of controller unit 31, triode T3 just can conducting; When triode T3 ends, the coil no power of relay J 1; When power supply VCC1 have electricity, triode T3 receive the control signal of controller unit 31 time, triode T3 conducting, the coil electricity of relay J 1; When power supply VCC1 dead electricity, relay J 1 coil no power; When relay J 1 coil no power, normally-closed contact switch is in release and connects; When relay J 1 coil electricity, normally-closed contact switch is in adhesive and disconnects.

The above electric capacity C2 and resistance R4 etc. form capacitor differential circuit, controllable silicon VT is the electric energy of battery 20 and the electric energy of charging output is the first power supply unit 41, the concrete on-off switch of voltage detection unit 33 and the supply of second control circuit 2 power supply, controllable silicon VT is one-way SCR, resistance R3 is the current-limiting resistance of the grid of controllable silicon VT, capacitor differential circuit and controllable silicon VT form the Self-closing lock function that powers on, when the battery 20 charged accesses charger 1000, the dump energy of battery 20 charges to C2, because the voltage at electric capacity C2 two ends can not suddenly change, slowly rise from zero, thus battery 20 accesses initial grid triggering signal being delivered to controllable silicon VT, controllable silicon VT conducting self-locking, the conducting of controllable silicon VT is until pass through the anode of controllable silicon VT, till when the electric energy of electric energy and charging output that cathode work current is less than the battery 20 maintaining electric current or access disappears, when controllable silicon VT conducting self-locking, the electric energy that the electric energy of battery 20 and charging export exports the first power supply unit 41 to from the negative electrode of controllable silicon VT, voltage detection unit 33, power supply VCC1, electric capacity C3, electric capacity C3 is used for energy storage, when in second control circuit 2, triode T3 base stage receives the control signal of controller unit 31, triode T3 conducting, the coil electricity of relay J 1, the normally-closed contact switch adhesive of relay J 1 disconnects, thus the power supply joining controllable silicon VT anode disappears, controllable silicon VT ends, the path blockade that the electric energy that the electric energy of battery 20 and charging export is the first power supply unit 41, voltage detection unit 33, power supply VCC1 supply, the first power supply unit 41, voltage detection unit 33, power supply VCC1 dead electricity, when power supply VCC1 dead electricity, then the coil no power of relay J 1, the release of normally-closed contact switch is connected, and only has and again adds triggering signal at grid and could trigger controllable silicon VT conducting self-locking, after transfering to battery 20 from charger 1000, electric capacity C2 is discharged, and again can access battery 20 and charge, otherwise Self-closing lock switch module 150 powers on Self-closing lock disabler, and controllable silicon VT namely can not be made from conducting locking.

Because the electric capacity C3 for energy storage exists, when can ensure the coil electricity of relay J 1 completely, normally-closed contact switch meets adhesive action.

Second execution mode of Self-closing lock switch module 150 of the present invention, require that the operating current flowing through Self-closing lock switch module 150 is greater than the extinction current of controllable silicon VT, namely the operating current summation of the first power supply unit 41, voltage detection unit 33 and second control circuit 2 must be greater than the extinction current of controllable silicon VT, otherwise Self-closing lock switch module 150 cisco unity malfunction.

In Self-closing lock switch module 150 of the present invention, electric capacity C1, electric capacity C2 select the electric capacity that electric leakage is few, as tantalum electric capacity, niobium electric capacity etc.

In the present invention, when charger 1000 accesses battery 20, think that oneself warp of electric capacity C1, electric capacity C2 is complete and discharge, namely must after the complete complete electric discharge of electric capacity C1, electric capacity C2, battery 20 accesses charger 1000 could self-charging.

As shown in Figure 8, be the first execution mode of the-control circuit 1 in the first execution mode of Self-closing lock switch module 150, the-control circuit 1 is by triode T4, T5, T6, T7, resistance R7, R8, R9, R10, R11, R12, R13, electric capacity C4, C5, diode D1 forms, and the collector electrode of triode T4 is connected with the positive pole of the first condenser type electric capacity C1 in opening switch 3, and the emitter of triode T4 is connected with the ground GND of direct current, the base stage of triode T4 is connected with one end of resistance R7, the other end of resistance R7, one end of resistance R12, one end of resistance R13, the collector electrode of triode T5 is connected with each other, the base stage of triode T5, the positive pole of diode D1, one end of resistance R10, one end of electric capacity C4 is connected with each other, the other end of resistance R12, the base stage of triode T6, the collector electrode of triode T7 is connected with each other, the other end of resistance R10, one end of resistance R11, the emitter of triode T6 is connected with each other, the base stage of triode T7, one end of resistance R8, one end of resistance R9, one end of electric capacity C5 is connected with each other, the other end of electric capacity C4, the other end of electric capacity C5, the other end of resistance R9, the emitter of triode T5, the emitter of triode T6, the ground GND of the emitter rear access direct current connected with each other of triode T7, the other end of resistance R8 is connected with the output of controller unit 31, the other end of resistance R11, the other end of resistance R13, receive power supply VCC2 after the negative pole of diode D1 is connected with each other, described power supply VCC2 both directly can access the emitter of the first condenser type triode T2 in opening switch 3, also the power output end of accessible first power supply unit 41.In this example, power supply VCC2 directly accesses the emitter of triode T2.

The above triode T4 forms first control circuit 1 output switch, triode T5, T6, resistance R10, R11, R12, R13 form basic asymmetric bistable circuit, in this example, triode T5, T6 parameter is consistent, resistance R11, R13 are equal, and resistance R12 is less than resistance R10, and power supply VCC2 mono-has electricity, triode T6 is saturated, triode T5 ends, and the collector electrode output high level of triode T5 is saturated by resistance R7 control triode T4, the ground GND short circuit of electric capacity C1 and direct current, when electric capacity C4 has an electricity for ensureing power supply VCC2 mono-, triode T5 is made to be in cut-off better, it is saturated that diode D1 is used for triode T5, and during power supply VCC2 dead electricity, electric capacity C1 repid discharge is used, triode T7 proceeds to cut-off for controlling triode T6 by saturated, triode T7 is in cut-off state at ordinary times, only have after battery 20 is full of, controller unit 31 just exports high level is delivered to triode T7 base stage by resistance R8, triode T7 is entered saturated by cut-off, the base stage of triode T6 is dragged down by height, triode T6 proceeds to cut-off by saturated, the collector electrode of triode T6 is exported high level and is charged to electric capacity C4 by resistance R10, when the voltage at electric capacity C4 two ends reaches triode T5 conducting, it is saturated that triode T5 proceeds to conducting by cut-off, the low level that triode T5 collector electrode exports is by resistance R7 to triode T4 base stage, triode T4 enters cut-off by saturated, first condenser type electric capacity C1 in opening switch 3 is charged by resistance R1, when the voltage at electric capacity C1 two ends reaches the T1 cut-off of control triode, triode T1, T2 ends, namely close the output of triode T2, electric capacity C5 is used for anti-interference, and resistance R9 is for ensureing that triode T7 reliably ends at ordinary times.

In the embodiment of the present invention, triode T4, T5, T6, T7 are NPN type switch triode.

From circuit analysis: when power supply VCC2 dead electricity, triode T4 ends.

As shown in Figure 9, it is the second execution mode of the-control circuit 1 in the first execution mode of Self-closing lock switch module 150, first control circuit 1 is made up of resistance R14, R15, R16, R17, R18, electric capacity C6, C7, triode T8, trigger A, and described trigger A is digital d type flip flop, the collector electrode of described triode T8 is connected with the positive pole of the first condenser type electric capacity C1 in opening switch 3, the emitter of triode T8 is connected with the ground GND of direct current, the base stage of triode T8 is connected with one end of resistance R14, the other end of resistance R14 is held with the output Q of trigger A and is connected, the power end of trigger A, one end of resistance R16, one end of resistance R17, one end rear access power supply VCC3 connected with each other of resistance R18, the set end of trigger A is accessed after the other end of resistance R16 is connected with the positive pole of electric capacity C6, the other end of resistance R17 is connected with the clear terminal of trigger A, the other end of resistance R18, one end of electric capacity C7, the output of controller unit 31 is linked into after the data input pin of trigger A is interconnected, after one end of resistance R15 is connected with trigger A clock end, another of access controller unit 31 exports, the other end of electric capacity C6, the other end of electric capacity C7, the other end of resistance R15, the power cathode of trigger A is connected with each other to be connected with the ground GND of direct current afterwards, described power supply VCC3 both directly can access the emitter of the first condenser type triode T2 in opening switch 3, also the power output end of accessible first power supply unit 41, the voltage problem of digital d type flip flop is considered in this example, power supply VCC3 is accessed the power output end of the first power supply unit 41.

The clear terminal of above-described trigger A, set end is Low level effective, when power supply VCC3 has electricity, the set end of trigger A produces asserts signal under the effect of electric capacity C6, the output Q of trigger A holds as high level, triode T8 is entered saturated by cut-off, it is high level that electric capacity C6 is full of rear set end, the clear terminal of trigger A is protected always is treated high level under resistance R17 effect, the effect of resistance R18 makes the data input pin of trigger A at ordinary times be high level, the data input pin that electric capacity C7 is used for trigger A is anti-interference, keep the data input pin of trigger A to be the advantage of high level being at ordinary times, when the clock end of trigger A has interference, because the data input pin of trigger A is high level, high level is held to remain unchanged so trigger A exports Q, resistance R15 is zero for keeping the clock end of trigger A at ordinary times, after battery 20 is full of, controller unit 31 first by after low level output to the data input pin of trigger A, then exports the clock end of pulse to trigger A, under the effect of pulse, the output Q end of trigger A converts low level to by high level, and triode T8 enters cut-off by saturated.

In present embodiment, triode T8 function is the same with triode T4 function in the first execution mode of the-control circuit 1, no longer illustrates.

From circuit analysis: when power supply VCC3 dead electricity, triode T8 ends.

As shown in Figure 10, it is the first execution mode of electronic switch 110, electronic switch 110 is made up of relay J 2, diode D2, one end of the coil of described relay J 2 and diode D2 negative pole are also linked into the power output end of the first power supply unit 41 after connecing, the other end of the coil of relay J 2 and diode D2 positive pole are also linked into the ground GND of direct current after connecing, the normally opened contact switch tandem of relay J 2 connects between power supply 10 and current rectifying and wave filtering circuit 21 input outside.

The course of work of the first execution mode of electronic switch 110 is: when the first power supply unit 41 has electricity, the coil electricity of relay J 2, the normally opened contact adhesive of relay J 2, and current rectifying and wave filtering circuit 21 is connected with the path of external power supply 10; When the first power supply unit 41 dead electricity, the coil losing electricity of relay J 2, the normally opened contact release of relay J 2, current rectifying and wave filtering circuit 21 disconnects with the path of external power supply 10.

As shown in figure 11, it is the second execution mode of electronic switch 110, this execution mode is changed by the first execution mode of electronic switch 110, first execution mode basis has been set up by triode T9, the control circuit that forms of resistance R19, R20, and one end that the first execution mode repeat circuit J2 coil is connected with the ground GND of direct current is moved on to the collector electrode of triode T9, the emitter of triode T9 is linked into the ground GND of direct current, the output of access controller unit 31 after the base stage tandem resistance R19 of triode T9.

Second execution mode of the above electronic switch 110 is only for the another enforcement of accessory power supply 140 second execution mode application.

The feature that second execution mode of electronic switch 110 is applied in the second execution mode of accessory power supply 140 is: in external power outage situation, controller unit 31 normally opened contact of the mode control relay J2 of timing is connected, detect external power supply 10 whether to send a telegram here, there is no electricity, the normally opened contact release of control relay J2, controller unit 31 enters not eye, thus realizes external power supply 10 without more energy-conservation during electricity, if external power supply 10 has electricity, then enter and charged normal control.

After charger of the present invention 1000 pairs of batteries 20 are full of, the switch of Self-closing lock switch module 150 is closed, the switch of electronic switch 110 disconnects, when battery 20 is not transferred to from charger 1000, the electric energy consumption consume that charger 1000 produces is as follows: the power consumption produced external power source 10 is zero; To battery 20 produce power consumption close to zero because the switch of Self-closing lock switch module 150 is closed, and the output of modular converter 22 has the circuit preventing battery 20 from pouring in down a chimney, thus charger 1000 produce be leakage current energy consumption.

Certainly, embodiments all is above merely illustrative and not limiting to the invention, the above is only preferred embodiment of the present invention, therefore all equivalences done according to the method described in patent claim of the present invention change or modify, and are included in the application range of patent of the present invention.

Claims (5)

1. a charger, comprise: charging main circuit and the electronic switch be connected between external power supply, supply the accessory power supply of Monitoring and Controlling module and electronic switch work, described Monitoring and Controlling module comprises and is connected with charging detecting unit, the controller unit of voltage detection unit, the described output of charging main circuit is connected with the battery of charging, the control end of charging main circuit is connected with the output of Monitoring and Controlling module middle controller unit, the input of described accessory power supply is connected with charging main circuit, the output of accessory power supply is connected with the power input of electronic switch, the power input of Monitoring and Controlling module is connected, Self-closing lock switch module is serially connected with between the power input of accessory power supply and the battery of charging, described accessory power supply comprises the first power supply unit and the second power supply unit, the power input of described first power supply unit is connected with the output of Self-closing lock switch module, the output of the first power supply unit is connected with the power input of electronic switch, in the power input access charging main circuit of described second power supply unit, the output of the second power supply unit is connected with the power input of Monitoring and Controlling module, it is characterized in that, described Self-closing lock switch module comprises the first condenser type from opening switch, first control circuit, described first condenser type from opening switch by electric capacity C1, resistance R1, resistance R2, triode T1, triode T2 forms, one end of described resistance R1, the emitter of triode T1, be connected with the positive pole of battery by connecting line after the collector electrode of triode T2 is connected with each other, the other end of resistance R1, one end of resistance R2, the output of the positive pole rear access first control circuit connected with each other of electric capacity C1, the negative pole of electric capacity C1 is connected with the negative pole of battery and accesses the ground GND of direct current, the other end of resistance R2 is connected with the base stage of triode T1, the collector electrode of triode T1 is connected with the base stage of triode T2, the emitter of triode T2 accesses the power input of the first power supply unit and voltage detection unit, another of the control end of first control circuit and controller unit exports and is connected, obtain the power supply that the working power of first control circuit exports from the first condenser type from opening switch.

2. a kind of charger according to claim 1, it is characterized in that, described Self-closing lock switch module also comprises the second condenser type from opening switch, second control circuit and electric capacity C3, described second condenser type from opening switch by electric capacity C2, resistance R3, resistance R4, controllable silicon VT, and the normally-closed contact switch composition of relay J 1, the positive pole of described electric capacity C2 is connected with the positive pole of battery by connecting line after connecting with one end of the normally-closed contact switch of relay J 1, the other end of the normally-closed contact switch of relay J 1 is connected with the anode of controllable silicon VT, the negative pole of electric capacity C2, one end of resistance R3, one end of resistance R4 is connected with each other, the other end of resistance R3 is connected with the grid of controllable silicon VT, the other end of resistance R4, the negative electrode of controllable silicon VT, positive pole rear access first power supply unit connected with each other of electric capacity C3 and the power input of voltage detection unit, the negative pole of electric capacity C3 is connected with the ground GND of direct current, described second control circuit is made up of the coil of resistance R5, resistance R6, triode T3, relay J 1, the output of one end of resistance R5, one end of resistance R6 rear access controller unit connected with each other, the other end of resistance R5 is connected with the base stage of triode T3, the negative pole of battery and the ground GND of direct current is accessed after the other end of resistance R6 is connected with the emitter of triode T3, the collector electrode of triode T3 is connected with one end of relay J 1 coil, and the other end of relay J 1 coil accesses the power supply that the second condenser type exports from opening switch, obtain the power supply that the working power of second control circuit exports from the second condenser type from opening switch.

3. a kind of charger according to claim 1, is characterized in that, described first control circuit is by triode T4, T5, T6, T7, resistance R7, R8, R9, R10, R11, R12, R13, electric capacity C4, C5, diode Dl form, and the collector electrode of triode T4 is connected with the positive pole of the first condenser type electric capacity C1 in opening switch, and the emitter of triode T4 is connected with the ground GND of direct current, and the base stage of triode T4 is connected with one end of resistance R7, the other end of resistance R7, one end of resistance R12, one end of resistance R13, the collector electrode of triode T5 is connected with each other, the base stage of triode T5, the positive pole of diode Dl, one end of resistance R10, one end of electric capacity C4 is connected with each other, the other end of resistance R12, the base stage of triode T6, the collector electrode of triode T7 is connected with each other, the other end of resistance R10, one end of resistance R11, the emitter of triode T6 is connected with each other, the base stage of triode T7, one end of resistance R8, one end of resistance R9, one end of electric capacity C5 is connected with each other, the other end of electric capacity C4, the other end of electric capacity C5, the other end of resistance R9, the emitter of triode T5, the emitter of triode T6, the ground GND of the emitter rear access direct current connected with each other of triode T7, the other end of resistance R8 is connected with the output of controller unit, the other end of resistance R11, the other end of resistance R13, the power supply that negative pole rear access first condenser type connected with each other of diode Dl exports from opening switch.

4. a kind of charger according to claim 1, is characterized in that, described first control circuit is also by resistance R14, R15, R16, R17, R18, electric capacity C6, C7, triode T8, trigger forms, the collector electrode of described triode T8 is connected with the positive pole of the first condenser type electric capacity C1 in opening switch, the emitter of triode T8 is connected with the ground GND of direct current, the base stage of triode T8 is connected with one end of resistance R14, the other end of resistance R14 is held with the output Q of trigger and is connected, the power end of trigger, one end of resistance R16, one end of resistance R17, the power supply that one end rear access first condenser type connected with each other of resistance R18 exports from opening switch, the set end of trigger is accessed after the other end of resistance R16 is connected with the positive pole of electric capacity C6, the other end of resistance R17 is connected with the clear terminal of trigger, the other end of resistance R18, one end of electric capacity C7, be linked into the output of controller unit after the data input pin of trigger is interconnected, after one end of resistance R15 is connected with trigger clock end, another of access controller unit exports, the other end of electric capacity C6, the other end of electric capacity C7, the other end of resistance R15, the power cathode of trigger is connected with each other to be connected with the ground GND of direct current afterwards.

5. a control method for charger as claimed in claim 1, is characterized in that, comprises as follows:

A) battery charging front connection with charger is in off-state;

B), when the connection of battery and charger disconnects, accessory power supply must not be electric, and electronic switch is in off-state, and charger power consumption is zero;

C) battery is linked into the output of charger, and control condenser type in Self-closing lock switch module and connect and locking from opening switch, accessory power supply obtains electric, and electronic switch is connected;

D), when charger is linked into the external power supply of energising, Monitoring and Controlling module is charged to battery by charging main circuit according to battery status;

E) in battery charging process, external power supply dead electricity, after incoming call, continues battery automatic charging;

F) when Monitoring and Controlling module detects that battery is full of, output a control signal to Self-closing lock switch module, condenser type is closed from opening switch, namely the path blockade between battery to accessory power supply, accessory power supply dead electricity, electronic switch disconnects, and the connection of charger and external power supply disconnects, and charger power consumption is close to zero;

G) in battery charging process, transfer to battery, accessory power supply dead electricity, electronic switch disconnects, and the connection of charger and external power supply disconnects.