CN201213231Y

CN201213231Y - Portable mobile power source

Info

Publication number: CN201213231Y
Application number: CNU2008201502274U
Authority: CN
Inventors: 阚显贵
Original assignee: SHANGHAI EKEIC TECHNOLOGY Co Ltd
Current assignee: SHANGHAI EKEIC TECHNOLOGY Co Ltd
Priority date: 2008-06-30
Filing date: 2008-06-30
Publication date: 2009-03-25
Anticipated expiration: 2018-06-30

Abstract

The utility model discloses a portable and movable source comprising an AC source interface, a rectification filter circuit, an external priority charging circuit, a rechargeable battery charging management circuit, a rechargeable battery, a battery protection circuit, a multi-voltage output voltage regulator circuit, an MCU control circuit and a DC source output interface. The output end of the rectification filter circuit is connected with one end of a first primary coil of a current transformator with two primary poles and one secondary pole, and the other end of the first primary coil is grounded through a power management module; one end of a second primary coil of the current transformator is connected with a resistor and a capacitor through the power management module, the other end of the second primary coil of the current transformator is grounded, and the secondary pole of the current transformator is connected with the filter circuit through a voltage regulator tube; and meanwhile, the secondary pole of the current transformator is connected with the external priority charging circuit, the rechargeable battery charging management circuit, the rechargeable battery, the battery protection circuit, the multi-voltage output voltage regulator circuit and the MCU control circuit through the voltage regulator tube and the filter circuit. The utility model has the protection functions of overvoltage, overcurrent, the overcharging, overdischarging and overheating of the rechargeable battery and high frequency harmonics and also has the advantages of multi-voltage output, external priority charging, MCU intelligent control, simple structure, reliable performance and low cost of the circuit, and the like.

Description

Portable portable power source

Technical field

The utility model relates to a kind of by the univoltage of microcomputer chip control or the mobile Constant Current Generator device of multivoltage output, relates in particular to portable portable power source.

Background technology

Comprise charger and chargeable lithium battery two parts for traditional chargeable source apparatus, the output voltage of this chargeable source apparatus is fixing single-minded, can not realize multivoltage output and a tractor serves several purposes and intelligent control.This class charger also becomes huge electronic pollution simultaneously because the single-minded intelligence inadequately of function has caused the significant wastage of resource.Present portable electric appts has powered battery mostly simultaneously, but battery capacity is limited, not long phenomenon service time can occur, so one has the power supply of big capacity electric energy to seem necessary.All form for traditional chargeable source apparatus, because the limitation of analog circuit itself makes its equipment aspect intellectuality, the automation inborn deficiency arranged by analog component.How to design an electric energy storage device that fills reliable, multiduty, advanced, intelligence and seem particularly important.

Summary of the invention

At the deficiency of prior art, the purpose of this utility model is to provide a kind of portable portable power source, to solve technical problems such as common charger function is single, kind is loaded down with trivial details, waste is huge.

The portable portable power source of the utility model realizes that technique scheme is as follows: it comprises AC power interface, current rectifying and wave filtering circuit, preferential externally charging circuit, chargeable battery charge management circuit, rechargable battery, battery protecting circuit, multivoltage output voltage stabilizing circuit, MCU control circuit, DC power supply output interface; Wherein rectification filter circuit output end links to each other with an end of first primary coil with two elementary and secondary current transformers, and the other end of this first primary coil is by power management module ground connection; Second primary coil, one end of current transformer is connected with resistance capacitance through power management module, other end ground connection, and the secondary of described current transformer is connected with filter circuit by voltage-stabiliser tube; The secondary of this current transformer connects preferential externally charging circuit, chargeable battery charge management circuit, rechargable battery, battery protecting circuit module, multichannel output voltage stabilizing circuit and MCU control circuit through voltage-stabiliser tube and filter circuit simultaneously.Preferential externally charging circuit is realized preferential externally charge function by the break-make that MCU controls corresponding metal-oxide-semiconductor; The chargeable battery charge management circuit is realized the Charge Management process of chargeable battery by charging management chip; in charging process, follow the process of " first constant current; back constant voltage "; to guarantee safety and protection, judge according to the state of charging current whether rechargable battery is full of the indication LED of lighting correspondence simultaneously simultaneously to rechargable battery.Can be at the multivoltage output voltage stabilizing circuit by triggering the break-make of controlling corresponding triode by key control MCU, to select different output voltages.When selecting different output voltages simultaneously, corresponding indication LED is lighted, indication current output voltage state.MCU judges current charged state by the voltage of the current sense resistor at detection DC power supply output interface place in external discharge process, to light corresponding LED, shows but preceding external discharge condition.

Aforesaid portable portable power source, wherein second primary coil in the current transformer is linked to each other by the switching power source chip module with divider resistance by diode with the end of the same name of first primary coil.The direct ground connection of this second primary coil other end.

The utlity model has that overvoltage, overcurrent, chargeable battery super-charge super-discharge are overheated, the defencive function of high-frequency harmonic; Also have multivoltage output, preferential externally charging, MCU Based Intelligent Control, circuit structure simply, dependable performance and advantage such as with low cost.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model;

Fig. 3 is circuit theory diagrams of the present utility model;

Fig. 4 is circuit theory diagrams of the present utility model.

Embodiment

Concrete structure of the present utility model can be the AC power input port with reference to figure 1,2:J1, J2; it is connected with a bridge rectifier D3; be connected to filter circuit C4, C5, L2 at bridge rectifier D3 output; this filter circuit links to each other with an end of first primary coil of current transformer T1, is connected to protective circuit R2, a C1, R9, D4 between these primary coil two ends.A power management module that produces the charging control of pulse is connected between this primary coil other end and the ground, and this power management module can adopt FSEZ1216 pattern piece.One end of second primary coil of current transformer T1 is divided into two-way, and one the tunnel through linking to each other with power management module 5 pin after R13, the R16 dividing potential drop, and 5 pin are through C11 ground connection simultaneously; Two-way is divided after through diode D6 again in another road, leads up to resistance R 1, R7 to link to each other with first primary coil, one end, and 6 pin of another termination power management module, and pass through capacitor C 10 and C9 ground connection; The other end ground connection of second primary coil.Described second primary coil plays voltage stabilizing and anti-reverse reverse and adjustment output voltage thereof.Ground connection behind the 1 pin connecting resistance R17 of power management module, 2,3,4 pin is the adjustment circuit of connecting resistance R18, R19, R20 and capacitor C 12, C13, C10 formation output voltage respectively.The output of described voltage transformer T1, by voltage stabilizing didoe D2, filter circuit L1, C3, a C6 link to each other other end ground connection through preferential externally charging circuit with chargeable battery charge management circuit module with battery protecting circuit with chargeable battery.

Whether preferentially shown in Fig. 3,4, preferential externally live part links to each other with the multivoltage output voltage stabilizing circuit by D5, send instruction by MCU and realize charging by the break-make that control Q3 controls Q1.Rechargable battery group two ends are connected with chargeable battery charge management circuit U1 and battery protecting circuit U3, U4, and battery protecting circuit U3, U4 are conventional art.When giving the batteries charging process, (promptly preferential externally charging does not exist) the utility model charges to internal cell by rechargable battery charge management circuit U1 after the Q1 conducting, and charging process is followed the process of " constant voltage after the first constant current ".It at first is the preliminary filling stage, BQ2057 at first checks operating voltage VCC (3 pin) after adding power supply, charger enters sleep pattern when low when operating voltage is crossed, if operating voltage is normal, whether then check battery temperature at setting range, if the undesired temperature fault pattern that then enters, otherwise detect cell voltage VBAT (2 pin), when cell voltage VBAT is lower than low pressure thresholding V (min), BQ2057 with the electric current I PRE of constant current IREG10% to battery pre-charging.Finish when battery preliminary filling or cell voltage Vbat be lower than constant voltage VREG (4.2V), BQ2057 enters the constant current charge state, this moment is by the monitoring of the pressure drop on the sensing resistor RSNS of outside charging current, this resistance can be taked the connected mode of flash, RSNS1 is connected between VCC (3 pin) and SNS (1 pin) pin in the flash current detecting, obtains the feedback of charging current by the SNS pin.When reaching constant voltage VREG, charging voltage enters the constant voltage charge state.In whole working temperature and operating voltage range, the constant voltage precision is higher than ± and 1%, BQ2057 is by VBAT (2 pin) and VSS (6 pin) pin monitoring battery voltage, stop charging when stopping threshold current I (TERM) when charging current reaches, begin automatically to charge again when charging threshold voltage V (RCH) again when cell voltage is lower than.BQ2057 is by the current charged state of ternary pin STAT (5 pin) report: the corresponding D8 of this pin high level lights, charges and finish the corresponding D7 of this pin low level and light during charged state.

The rechargeable battery set output connects DC-DC converter 4 pin and output circuit interface by diode D10.Can realize different output voltages by the conducting of controlling Q5, Q6, Q7 by key control MCU, corresponding simultaneously LED lights the current output voltage values of indication.Judge current charged state by the different current values that detection R24 flows through; after amplifying through U5A, R24 is input to the corresponding pin that detects of MCU; MCU judges current charged state by detecting currency; when output current is set a certain predetermined value greater than us; whether MCU sends the break-make of commands for controlling Q8 and works with control U6, in order to avoid the excessive damage external connected electronic of output current equipment is to reach the function of protection.The course of work of MCU is controlled by button S1, S2, and S1 is used for the effect of opening and closing MCU, and S2 is used to select the function of different output voltages.12 pin of MCU be AD conversion reference voltage end by U7 through R37 and R39 voltage after partial value.The power supply that 1 pin of MCU is provided by rechargeable battery; Whether 2 pin are controlled U6 by the break-make of control Q8 and are worked; 3 pin are used to judge for detecting the current voltage of rechargeable battery whether current rechargeable battery has been low-voltage state; 5 pin are used for the action of sense switch S1; 6 pin are used for the action of sense switch S2; 7 pin are used to detect the current output current situation of R24 of output port, are used for judging that output state is to finish or do not have external equipment for charging process or charging; 8 pin are used to control the break-make of Q7 to realize that 9V voltage is output; The break-make that 9 pin are used to control Q6 realizes the output of 6V voltage; The break-make that 10 pin are used to control Q5 realizes that 5V voltage is output; Whether the break-make that 11 pin are used to control Q3 realizes preferential output function; 12 pin are the inner AD conversion of MCU reference voltage base; Whether 13 pin are controlled D14 for the current charged battery voltage state that detects by 3 pin and are lighted; 14 pin are MCU ground.

Just can realize all functions of the present utility model by so complete circuit structure and corresponding source program.

Claims

1; portable portable power source; comprise AC power interface; current rectifying and wave filtering circuit; preferential externally charging circuit; the chargeable battery charge management circuit; rechargable battery; battery protecting circuit; the MCU control circuit; the multivoltage output voltage stabilizing circuit; the DC power supply output interface; it is characterized in that: rectification filter circuit output end wherein links to each other with an end of first primary coil with two elementary and secondary current transformers; the other end of this primary coil is by power management module ground connection; second primary coil, one end of described current transformer is connected with resistance capacitance through power management module; other end ground connection; the secondary of described current transformer is connected with filter circuit by voltage-stabiliser tube, preferential externally charging circuit; the chargeable battery charge management circuit; chargeable battery; battery protecting circuit; multivoltage output voltage stabilizing circuit and DC power supply output interface.

2, microcomputer multifunctional portable portable power source according to claim 1, it is characterized in that: second primary coil in the current transformer and the end of the same name of first primary coil, link to each other the direct ground connection of this second primary coil other end by the switching power source chip module with divider resistance by diode.