CN202978308U - Movable power supply device - Google Patents

Movable power supply device Download PDF

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Publication number
CN202978308U
CN202978308U CN 201220442477 CN201220442477U CN202978308U CN 202978308 U CN202978308 U CN 202978308U CN 201220442477 CN201220442477 CN 201220442477 CN 201220442477 U CN201220442477 U CN 201220442477U CN 202978308 U CN202978308 U CN 202978308U
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China
Prior art keywords
mcu
power source
female seat
source device
usb female
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Expired - Fee Related
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CN 201220442477
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Chinese (zh)
Inventor
张国训
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SHENZHEN HOLDTEC INNOVATIONS CO., LTD.
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SHENZHEN ZHONGYUANHANG TECHNOLOGY Co Ltd
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Abstract

The utility model provides a movable power supply device which comprises a USB female socket and a MCU. The movable power supply device further comprises a priority detection unit. The input end of the priority detection unit is connected with the USB female socket, and the output end is connected with a priority detection signal input end of the MCU. When the priority detection unit detects an external power supply voltage input at the USB female socket, the priority detection unit outputs a detection signal to the MCU. At least one static contact is separately equipped at the periphery of an elastic sheet equipped on the USB female socket. The elastic sheet and the static contact form a normally open switch and are connected with the switch detection input end of the MCU. The elastic sheet electrically contacts with the static contact when a USB male port is inserted into the USB female socket, so that the normally open switch is switched off and a level change signal generated by the input end is detected at the switch. The movable power supply device can finish automatic switching for operation states of the movable power supply.

Description

A kind of portable power source device
[technical field]
The utility model relates to the portable power source technical field, is specifically related to the recognition technology that a kind of USB interface discharges and recharges priority.
[background technology]
Day by day universal along with multiple digital products such as mobile phone, MP3, MP4, PDA palmtop PC, handheld device, panel computers, portable office, portable game etc. become the development trend of society, a kind of portable charger that integrates power supply and charge function so just be born, it is portable power source, it can give the charging of the digital equipments such as mobile phone, panel computer or standby power supply whenever and wherever possible, its internal cell generally by lithium cell or dry cell as charge storage unit.Usually all on the portable power source shell, switch is set, realize switching the operating state of portable power source when utilizing portable power source to charge to the external number decoding apparatus by this external switch, this switching mode need to be offered on housing for the hole that switch is installed, and switch element is set on current supply circuit, make the processing more complicated, increase processing cost; By the frequent switch portable power source of switch, strengthen on the contrary the excess loss of portable power source in addition, can't effectively reduce the power consumption of power supply itself, the energy of saving portable power source storage inside.In addition, usually in view of the USB interface agreement, two small one and large one USB interface are set all, one is used for by portable power source, load being charged, and one is used for by external power supply, portable power source equipment being charged, and this design is comparatively complicated, is inconvenient to use.So, be necessary to improve further the management of charging and discharging strategy of portable power source USB interface.
[utility model content]
In view of above-mentioned condition, the utility model provides a kind of portable power source device, and it can realize the management of charging and discharging of portable power source by a USB interface, the convenient use.Concrete technical scheme is as follows:
The utility model provides a kind of portable power source device, and it comprises: USB female seat, MCU; Described portable power source device also comprises: the priority detecting unit; The input of described priority detecting unit connects described USB female seat, the output of described priority detecting unit connects the priority detection signal input of described MCU, and described priority detecting unit detects when described USB female seat has the input of external power supply voltage and exports a detection signal to described MCU; The shell fragment peripheral clearance that arranges on described USB female seat arranges at least one fixed contact, described shell fragment forms a normal open switch and detects input with the switch of described MCU with described fixed contact and is connected, described shell fragment is in electrical contact with described fixed contact when public mouthful of USB inserts described USB female seat, described normal open switch is closed be incorporated in described switch detection input generation one level variable signal; When detecting input, the switch of described MCU receives described level variable signal, and when described MCU received from the detection signal of described priority detecting unit, described MCU controlled the external power supply voltage that described portable power source device is accepted described USB female seat access; When described MCU received only described level variable signal, described MCU controlled described portable power source device and discharges self supply voltage by described USB female seat.
On the basis of technique scheme, described portable power source device also comprises described switch element, described switch element is connected in the circuit loop of described USB female seat and described portable power source device internal battery formation, and the control end of described switch element connects the switching signal output of described MCU; Described MCU realizes that by conducting or the shutoff of control switch unit described portable power source device switches between the external power supply voltage of accepting described USB female seat access and the operating state by described USB female seat release self supply voltage.
on the basis of technique scheme, described switch element comprises: comprise the first switching tube, be connected on the diode D1 between described the first switching tube input/output terminal, second switch pipe and be connected on diode D2 between described second switch pipe input/output terminal, the input/output terminal of described the first switching tube connects respectively power supply terminal V+ on described USB female seat and the positive pole of portable power source device internal battery BT, the control end of described the first switching tube connects the IO mouth IO2 of described MCU as first switching signal output, the input/output terminal of described second switch pipe connects respectively positive pole and the signal ground of portable power source device internal battery BT, the control end of described second switch pipe connects the IO mouth IO3 of described MCU as second switching signal output, when described MCU controls described second switch pipe shutoff by described IO mouth IO3 output switching signal, control the loop that conducting/shutoff formation utilizes external power supply that portable power source device internal battery BT is charged of described the first switching tube by described IO mouth IO2, when described MCU controls described the first switching tube and turn-offs by described IO mouth IO2 output switching signal, control the conducting of described second switch pipe/shutoffs formation by described IO mouth IO3 and utilize portable power source device internal battery BT to treat the loop that charging load is charged.
On the basis of technique scheme, the earth connection terminal on described USB female seat is electrically connected on the shell fragment that arranges on the USB female seat, and the switch that described fixed contact is electrically connected on described MCU detects input.
On the basis of technique scheme, the detection signal of described priority detecting unit output is a voltage sampling signal, described priority detecting unit has external power supply voltage when input to sample external power supply voltage signal on described USB female seat power supply terminal to described MCU in described USB female seat, described MCU receive described voltage sampling signal and described voltage sampling signal during greater than the predeterminated voltage value output switching signal control to described switch element and carry out conducting or turn-off operation, make described portable power source device accept the external power supply voltage of described USB female seat access.
On the basis of technique scheme, described priority detecting unit comprises: divider resistance R2 and divider resistance R3; After described divider resistance R2 is connected with divider resistance R3, an end connects the power supply terminal of described USB female seat, other end ground connection; The node that described divider resistance R2 is connected with divider resistance R3 connects the priority detection signal input of described MCU.
On the basis of technique scheme, described portable power source device also comprises: the load detecting unit; One end of described load detecting unit connects the earth connection terminal on described USB female seat, and the other end connects the load detection signal input of described MCU; Described load detecting unit load detection signal input at described MCU after the public mouth of described USB is pulled out produces a signal of telecommunication that changes, and described MCU makes described portable power source device switch to the stand-by operation attitude from the normal operation attitude according to this signal of telecommunication output one control signal.
On the basis of technique scheme, described shell fragment comprises a bend, described bend is for the shell of the public mouth of described USB of conflicting when public mouthful of USB inserts described USB female seat, and make the end of described bend consist of moving contact, be used for being electrically contacted described fixed contact by jack-up when public mouthful of described USB inserts described USB female seat.
On the basis of technique scheme, described load detecting unit comprises divider resistance R1, earth connection terminal on the described USB female seat of end connection of described divider resistance R1 and the load detection signal input of described MCU, the other end ground connection of described divider resistance R1.
On the basis of technique scheme, the portable power source device also comprises capacitor C 1, inductance L 1; Described switch element 32 comprises diode D1, diode D2, as the PMOS of the first switching tube pipe Q1, as NMOS pipe Q2, current-limiting resistance R4, the current-limiting resistance R5 of second switch pipe; The power line terminal V+ of described USB female seat connects an end of described capacitor C 1, the source electrode of described PMOS pipe Q1 and the negative electrode of described diode D1; The other end ground connection of described capacitor C 1; The grid of described PMOS pipe Q1 connects the switching signal output of described MCU by current-limiting resistance R4, the grid of described NMOS pipe Q2 connects another switching signal output of described MCU by current-limiting resistance R5, the drain electrode of described PMOS pipe Q1 connects the anode of described diode D1, an end of described inductance L 1, the drain electrode of described NMOS pipe Q2 and the negative electrode of described diode D2, the other end of described inductance L 1 connects the positive pole of portable power source device internal battery BT, and the source electrode of described NMOS pipe Q2 connects anode and the ground connection of described diode D2.
Technique effect of the present utility model:
The utility model arranges a mechanical type contact switch for detection of whether having load or external power supply to access by the shell fragment on the USB female seat, and to increase simultaneously that the priority detecting unit is used for be that load or external power supply judge to the access of USB female seat, when the mechanical type contact switch inserts public mouthful of closure of USB because of the USB female seat, when the priority detecting unit has detected the input of external power supply voltage, what be considered as the access of USB female seat is external power supply, and MCU controls the external power supply that the portable power source device is accepted the access of USB female seat; And when only having the mechanical type contact switch to insert the public mouthful of closed detection signal that produces of USB because of the USB female seat, what be considered as the access of USB female seat is load, and MCU controls the portable power source device and discharges self supply voltage by the USB female seat external load is charged.Can reduce by this kind mode the USB interface quantity that portable power source arranges, directly can realize the management that discharges and recharges realizing that USB interface discharges and recharges the setting of priority with a USB interface.
In addition, whether the utility model also by increasing the load detecting unit, detects public mouthful of USB and extracts from the USB female seat, and MCU controls described portable power source device according to the detection signal of load detecting unit and switches to the stand-by operation attitude from the normal operation attitude.Can avoid like this using switch that the operating state of portable power source is switched, thereby reduce peripheral component, reduce that the switch exposed port being set on housing, reduce procedure of processing, reduction die sinking cost cuts down finished cost, guarantee the housing integrality, improved overall tightness.
And the utility model has also reduced stand-by power consumption, reduces at least by the power consumption of up to a hundred milliamperes; The convenient use, easy and simple to handle, as long as USB interface is connected, can automatically identify judgement and realize that portable power source discharges and recharges and the switching of operating state, need not the restart switch button.
[description of drawings]
Fig. 1 is the structural representation of the utility model USB female seat;
Fig. 2 is the partial sectional view that Fig. 1 USB female seat is inserted into public mouthful of USB;
Fig. 3 is circuit structure block diagram of the present utility model;
Fig. 4 is the electrical block diagram of the utility model embodiment;
Fig. 5 is the optimum embodiment electrical block diagram of the utility model.
[embodiment]
For the ease of understanding the utility model, the below is described more fully the utility model with reference to relevant drawings.Provided preferred embodiment of the present utility model in accompanying drawing.But the utility model can be realized in many different forms, is not limited to embodiment described herein.On the contrary, provide the purpose of these embodiment be make the understanding of disclosure of the present utility model more comprehensively thorough.
Need to prove, when element is called as " being fixed in " another element, can directly can there be element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may have simultaneously centering elements.Term as used herein " vertical ", " level ", " left side ", " right side " and similar statement are just for illustrative purposes.
Unless otherwise defined, all technology of using of this paper and scientific terminology are with to belong to the implication that those skilled in the art of the present utility model understand usually identical.The term that uses in specification of the present utility model herein is not intended to be restriction the utility model just in order to describe the purpose of specific embodiment.Term as used herein " and/or " comprise one or more relevant Listed Items arbitrarily with all combinations.
For fear of using a plurality of USB interface to carry out management of charging and discharging, as shown in Figures 1 to 3, the utility model provides a kind of portable power source device, and it comprises: USB female seat 1, MCU 31, priority detecting unit 33.As shown in Figure 1, usually on USB female seat 1, shell fragment 11 is arranged all, be used for realizing the screens conflict with the public mouthful shell of USB.As shown in Figure 2 in the present embodiment, shell fragment 11 peripheral clearances that arrange on USB female seat 1 arrange at least one fixed contact K2, shell fragment 11 forms a normal open switch 4 with fixed contact K2, and be connected with the switch detection input of MCU 31, shell fragment 11 is in electrical contact with fixed contact K2 when public mouthful of USB inserts USB female seat 1, the switch that normal open switch 4 is closed be incorporated in MCU 31 detects input and produces a level variable signal.The present embodiment directly utilizes the mechanical structure characteristics of USB female seat itself to form a mechanical contact normal open switch 4, the normal conditions switch disconnects, only have and utilize the public mouth of USB to contact the structure of above-mentioned shell fragment 11 when public mouthful of USB inserts the USB female seat, and make shell fragment and above-mentioned fixed contact closed, can detect input at the switch of MCU 31 after closure and produce a level variable signal, be used to the operating state of controlling portable power source that Rule of judgment is provided.
In addition, as shown in Figure 3, the input of priority detecting unit 33 connects USB female seat 1, the output of priority detecting unit 33 connects the priority detection signal input of MCU 31, priority detecting unit 33 detects when USB female seat 1 has the input of external power supply voltage and exports a detection signal to MCU 31, is used to the operating state of controlling portable power source that another Rule of judgment is provided.The detection signal here can be the voltage signal that detects the input of external power supply voltage, also current signal.Receive above-mentioned level variable signal when the switch of MCU 31 detects input, and when MCU 31 received detection signal from priority detecting unit 33 simultaneously, MCU 31 controlled the external power supply voltage that the portable power source devices are accepted 1 access of USB female seat; When MCU 31 received only described level variable signal, MCU controlled the portable power source device and discharges self supply voltage by USB female seat 1.As seen only have when above-mentioned two conditions are all achieved, MCU 31 just allows external power supply that battery is charged, otherwise when only having first condition (being that MCU 31 receives only described level variable signal) achievement, what think access is load, and MCU 31 controls the portable power source device and utilizes battery that load is charged.
For the ease of to discharging and recharging the control of power circuit, the circuit structure of the present embodiment also has additional switch element 32, as shown in Figure 3, switch element 32 is connected in the power circuit of USB female seat 1 and portable power source device internal battery BT formation, the control end of switch element 32 connects the switching signal output of MCU 31, and the conducting or turn-off of MCU 31 by control switch unit 32 realizes that the portable power source device switches between the external power supply voltage of accepting 1 access of USB female seat and operating state by USB female seat 1 release self supply voltage.Namely, when detecting input, the switch of MCU 31 receives above-mentioned level variable signal from normal open switch 4, and when MCU 31 also receives from the detection signal of priority detecting unit 31, MCU 31 output switching signals carry out conducting or turn-off operation for described switch element 32, make the portable power source device accept the external power supply voltage of USB female seat 1 access; When MCU 31 received only the level variable signal, MCU 31 output switching signals carried out conducting or turn-off operation for described switch element 32, made the portable power source device discharge self supply voltage by USB female seat 1.Here utilize switch element 32 carry out conducting or turn-off operation according to the switching signal from MCU that receives, the portable power source device is switched utilizing USB female seat 1 to accept external power supply voltage and utilize USB female seat 1 to discharge between the operating state of self supply voltage.
the present embodiment arranges a mechanical type contact normal open switch 4 for detection of whether having load or external power supply to access by the shell fragment 11 on the USB female seat, and to increase simultaneously that the priority detecting unit is used for be that load or external power supply judge to the access of USB female seat, when mechanical type contact switch (being above-mentioned normal open switch 4) inserts public mouthful of closure of USB because of the USB female seat, when the priority detecting unit has detected the input of external power supply voltage, what be considered as the access of USB female seat is external power supply, the external power supply that MCU control portable power source device is accepted the access of USB female seat charges to portable power source device internal battery, and when only having mechanical type contact normal open switch 4 to insert public mouthful of closed level variable signal of USB because of the USB female seat, what be considered as the access of USB female seat is load, and MCU controls the portable power source device and discharges self supply voltage by the USB female seat external load is charged.Can effectively reduce by this kind mode the USB interface quantity that portable power source arranges, directly can realize the management that discharges and recharges realizing that USB interface discharges and recharges the setting of priority with a USB interface.And when the level variable signal that do not have from normal open switch 4, being considered as the USB female seat does not have public mouthful of access, and MCU should be directly switch into the stand-by operation state, need not control discharging and recharging of portable power source.The present embodiment can be realized the automatic switchover of portable power source device operating state and utilize a USB to realize that the priority of management of charging and discharging identifies automatically.
On the basis of technique scheme, as shown in Figure 1, the USB female seat comprises that shell fragment 11 and binding post 12(are comprising power supply terminal V+ and earth connection terminal V-), as shown in Figure 2, shell fragment 11 comprises a bend 111, bend 111 is for the shell of the public mouth 2 of conflict USB when USB inserts USB female seat 1 for public mouthful 2, and make the end of bend 111 consist of moving contact K1, be used for being electrically contacted fixed contact K2 by jack-up when USB inserts USB female seat 1 for public mouthful 2, fixed contact K2 is arranged on the circuit board 3 of portable power source battery control system.Moving contact K1 and fixed contact K2 consist of above-mentioned mechanical type contact normal open switch 4, the binding post 12 of the binding post 22 of public mouthful 2 of USB and USB female seat 1 is corresponding when USB inserts USB female seat 1 for public mouthful 2 electrically contacts, and the shell generation elastic deformation by public mouthful 2 of bend 111 conflict USB makes moving contact K1 and fixed contact K2 closure simultaneously.In Fig. 4, the earth connection terminal V-on the present embodiment USB female seat 1 is electrically connected on USB female seat 1 namely moving contact K1 of the shell fragment 11(that arranges), the switch that fixed contact K2 is electrically connected on MCU 31 detects input IO5.The closure state of normal open switch 4 can be detected easily by MCU 31 like this, more excellent scheme is, as shown in Figure 4 and Figure 5, the earth connection terminal V-of USB female seat 1 and shell fragment 11(be moving contact K1 namely) be connected in the lump signal ground, be in electrical contact with described fixed contact when public mouthful of USB inserts described USB female seat when the shell fragment on USB female seat 11, the switch detection input IO5 of MCU 31 just can receive by high level signal and become low level signal.Usually fixed contact K2 is unsettled as the IO mouth of MCU, be considered as high level, when USB is inserted in USB female seat 1 for public mouthful 2, no matter be the access external power supply, or external load to be charged, normal open switch 4 inserts USB female seat 1 rear closure for public mouthful 2 at USB, fixed contact K2 and moving contact K1 closure are dragged down level, and this variation will be identified by MCU31, as operating state one Rule of judgment of controlling portable power source, and first Rule of judgment of namely USB priority identification.
On the basis of technique scheme, as shown in Figure 3, the detection signal of above-mentioned priority detecting unit 33 outputs is a voltage sampling signal, and the external power supply voltage signal when priority detecting unit 33 has the input of external power supply voltage in USB female seat 1 on sampling USB female seat 1 power supply terminal V+ is to MCU 31.Whether the voltage signal of MCU31 judgement input satisfies the charging needs to battery BT, thereby realizes the Charge Management to battery BT.Usually only have when USB female seat 1 access external power supply voltage, priority detecting unit 33 just can detect the sampled voltage signal, otherwise, if 1 access of USB female seat is load, the power supply terminal of USB female seat 1 is not have the voltage input, also not having the sampled voltage signal inputs to MCU 31 and samples in this way external power supply voltage signal on USB female seat 1 power supply terminal V+ as operating state one Rule of judgment of controlling portable power source, second Rule of judgment of namely USB priority identification.。Here in optimum embodiment, as shown in Figure 4 and Figure 5, priority detecting unit 33 comprises: divider resistance R2 and divider resistance R3, after divider resistance R2 is connected with divider resistance R3, an end connects the power supply terminal V+ of USB female seat 1, other end ground connection, the node that divider resistance R2 is connected with divider resistance R3 connects the priority detection signal input IO1 of MCU 31.Equally, also can adopt detection USB female seat 1 to have the electric current of external power supply voltage input to realize detecting.
on the basis of technique scheme, above-mentioned switch element 32 is mainly used in switching the operating state of charge circuit and the discharge loop of battery BT, specifically can adopt the switching tube realizations such as metal-oxide-semiconductor, as shown in Figure 4, above-mentioned switch element 32 comprises the first switching tube 321, be connected on the diode D1 between the first switching tube 321 input/output terminals, second switch pipe 322 and be connected on diode D2 between second switch pipe 322 input/output terminals, the input/output terminal of described the first switching tube 321 connects respectively power supply terminal V+ on described USB female seat 1 and the positive pole of portable power source device internal battery BT, the control end of described the first switching tube 321 connects the IO mouth IO2 of MCU 31 as first switching signal output, the input/output terminal of second switch pipe 322 connects respectively positive pole and the signal ground of portable power source device internal battery BT, the control end of second switch pipe 322 connects the IO mouth IO3 of MCU 31 as second switching signal output.When MCU 31 controls 322 shutoff of second switch pipe by the IO3 output switching signal, control the loop that conducting/shutoff formation utilizes external power supply that portable power source device internal battery BT is charged of the first switching tube 321 by IO2, when MCU31 controls the first switching tube 321 and turn-offs by the IO2 output switching signal, controls the conducting of second switch pipe 322/shutoff formation by IO3 and utilize portable power source device internal battery BT to treat the loop that charging load is charged.usually also be provided with large storage capacitor C1 in the circuit loop of portable power source device, when the first switching tube 321 conductings, when second switch pipe 322 turn-offs, be portable power source device internal battery BT charging by the first switching tube 321, inductance L 1 successively by the external power supply voltage in access USB female seat 1, when the first switching tube 321 turn-offs, when second switch pipe 322 turn-offs, is portable power source device internal battery BT charging by inductance L 1 and diode D2 formation continuous current circuit, in addition, when the first switching tube 321 turn-offs, during 322 conducting of second switch pipe, portable power source device internal battery BT is by inductance L 1, diode D1 and capacitor C 1 are charged for the load to be charged in access USB female seat 1, and when the first switching tube 321 shutoffs, when second switch pipe 322 turn-offs, portable power source device internal battery BT and inductance L 1 form continuous current circuit jointly to capacitor C 1 charging by diode D1, and charge for the load to be charged in access USB female seat 1 simultaneously, and the first switching tube 321 and 322 shutoffs of second switch pipe and conducting situation all are subjected to the control of MCU, realize the charge circuit of automatic switchover battery BT and the operating state of discharge loop.First switching tube 321 here and second switch pipe 322 can freely be selected suitable model according to switch conduction charging and discharging circuit requirements of one's work.Based on this technical scheme, the detection signal of priority detecting unit 33 outputs is a voltage sampling signal, MCU 31 receives described voltage sampling signal and it is judged, when described voltage sampling signal during greater than the predeterminated voltage value output switching signal control to two switching tubes in described switch element 32 and carry out conducting or turn-off operation, make described portable power source device accept the external power supply voltage of described USB female seat access.And the predeterminated voltage value here must press greater than the maximum voltage of battery the sample voltage value of acquisition in 33 minutes at the priority detecting unit, namely, the external power supply voltage that the voltage sampling signal of priority detecting unit 33 outputs reflects must (be the maximum voltage of battery greater than a preset value, such as 4.2V), just can start the unit corresponding conducting of execution of MCU control switch or turn-off operation.Similarly, the switch element here can also directly only utilize two switching tubes successively alternate conduction/shutoff realize the control of charging and discharging circuit, and do not need to utilize diode to realize continuous current circuit.
On the basis of technique scheme, as shown in Figure 3, the present embodiment increases by increasing load detecting unit 34 reliability that holding state automaticallyes switch.One end of load detecting unit 34 connects the earth connection terminal V-on USB female seat 1, the other end connects the load detection signal input of described MCU 31, load detecting unit 34 is after the public mouth of USB is pulled out, load detection signal input at MCU 31 produces a signal of telecommunication that changes, and MCU 31 makes the portable power source device switch to the stand-by operation attitude from the normal operation attitude according to this signal of telecommunication output one control signal.Whether the present embodiment is extracted from the USB female seat by public mouthful of load detecting unit 34 detection USB, when the public mouth of USB is extracted from the USB female seat, load does not exist, disconnect between the power supply terminal V+ of USB female seat and earth connection terminal V-, and shell fragment 11 also disconnects with fixed contact K2, so, certainly exist the signal of telecommunication of variation on the earth connection terminal V-on USB female seat 1, MCU judges by catching this variation signal of telecommunication whether load has broken away from the USB female seat, switches to the stand-by operation attitude thereby control the portable power source device from the normal operation attitude.Can avoid like this using switch that the operating state of portable power source is switched, thereby reduce peripheral component, reduce that the switch exposed port being set on housing, reduce procedure of processing, reduction die sinking cost cuts down finished cost, guarantee the housing integrality, improved overall tightness.
Illustrate the novel optimum embodiment of this enforcement below in conjunction with accompanying drawing 5.
In the present embodiment; the portable power source device comprises USB female seat 1; consist of divider resistance R2 and the R3 of priority detecting unit 33; MCU 31, consist of the divider resistance R1 of load detecting unit 34, consist of diode D1, diode D2, PMOS pipe Q1, the NMOS pipe Q2 of switch element 32; capacitor C 1; inductance L 1 is for the protection of the current-limiting resistance R4 of PMOS pipe Q1, for the protection of the current-limiting resistance R5 of NMOS pipe Q2.The power line terminal V+ of USB female seat 1 connects the end of divider resistance R2, an end of capacitor C 1, the source electrode of PMOS pipe Q1 and the negative electrode of diode D1; The other end of divider resistance R2 passes through divider resistance R3 ground connection, and also connects the priority detection signal input IO1 of MCU 31; The other end ground connection of capacitor C 1; The grid of PMOS pipe Q1 connects the switching signal output IO2 of MCU 31 by current-limiting resistance R4, the grid of NMOS pipe Q2 connects another switching signal output IO3 of MCU 31 by current-limiting resistance R5, the drain electrode of PMOS pipe Q1 connects the anode of diode D1, an end of inductance L 1, the drain electrode of NMOS pipe Q2 and the negative electrode of diode D2, the other end of inductance L 1 connects the positive pole of portable power source device internal battery BT, and the source electrode of NMOS pipe Q2 connects anode and the ground connection of diode D2.The shell fragment 11(that arranges on the load detection signal input IO4 of the end connection MCU 31 of divider resistance R1, the earth connection terminal V-of USB female seat 1 and USB female seat 1 is moving contact K1 namely), the other end ground connection of divider resistance R1, the switch that fixed contact K2 is electrically connected to MCU 31 detects input IO5.when USB inserts USB female seat 1 for public mouthful 2, shell fragment 11(is moving contact K1 namely) closed with fixed contact K2, the level of the earth connection terminal V-of USB female seat 1 is dragged down, and MCU receives the level variable signal from normal open switch 4, the first Rule of judgment achievement of above-mentioned USB priority identification, if the access be external power supply the time, by divider resistance R2, the sampled voltage signal that R3 can divide on the power supply terminal V+ of USB female seat 1 inputs to MCU31, when MCU 31 receives this voltage sampling signal, judge that whether the external power supply of power supply terminal V+ access is greater than 4.2V, if be considered as second Rule of judgment achievement of USB priority identification, so MCU 31 controls NMOS Q2 and turn-offs, by the loop that conducting/shutoff formation utilizes external power supply that portable power source device internal battery BT is charged of controlling PMOS pipe Q1, if not, second Rule of judgment that is considered as the identification of USB priority do not achieved.In addition, MCU 31 controls that PMOS Q1 turn-off, the conducting by controlling NMOS pipe Q2/shutoffs formation utilizes portable power source device internal battery BT to treat the loop that charging load is charged.Detailed process is as follows:
When NMOS Q2 turn-offs, during PMOS pipe Q1 conducting, by the external power supply voltage in access USB female seat 1 successively by PMOS manage Q1, inductance L 1 is charged for portable power source device internal battery BT; When NMOS Q2 shutoff, when PMOS pipe Q1 turn-offs, forming continuous current circuit by inductance L 1 and diode D2 is portable power source device internal battery BT charging.
When PMOS Q1 shutoff, NMOS pipe Q2 conducting, portable power source device internal battery BT charges for the load to be charged in access USB female seat 1 by inductance L 1, diode D1 and capacitor C 1, and when PMOS Q1 shutoff, when NMOS pipe Q2 turn-offs, portable power source device internal battery BT and inductance L 1 form continuous current circuit by diode D1 and jointly charge, also charge for the load to be charged in access USB female seat 1 simultaneously to capacitor C 1.
In addition, when USB extracts from USB female seat 1 for public mouthful 2, load does not exist, disconnect between the power supply terminal V+ of USB female seat and earth connection terminal V-, and shell fragment 11 (namely moving contact K1) also disconnects with fixed contact K2, earth connection terminal V-on USB female seat 1 is again unsettled, certainly exist the signal of telecommunication of variation on the earth connection terminal V-on USB female seat 1, MCU judges by the variation of the upper voltage of divider resistance R1 whether load has broken away from the USB female seat, switches to the stand-by operation attitude thereby control the portable power source device from the normal operation attitude.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.

Claims (10)

1. portable power source device, it comprises: USB female seat, MCU; It is characterized in that, described portable power source device also comprises: the priority detecting unit;
The input of described priority detecting unit connects described USB female seat, the output of described priority detecting unit connects the priority detection signal input of described MCU, and described priority detecting unit detects when described USB female seat has the input of external power supply voltage and exports a detection signal to described MCU;
The shell fragment peripheral clearance that arranges on described USB female seat arranges at least one fixed contact, described shell fragment forms a normal open switch and detects input with the switch of described MCU with described fixed contact and is connected, described shell fragment is in electrical contact with described fixed contact when public mouthful of USB inserts described USB female seat, described normal open switch is closed be incorporated in described switch detection input generation one level variable signal;
When detecting input, the switch of described MCU receives described level variable signal, and when described MCU received from the detection signal of described priority detecting unit, described MCU controlled the external power supply voltage that described portable power source device is accepted described USB female seat access; When described MCU received only described level variable signal, described MCU controlled described portable power source device and discharges self supply voltage by described USB female seat.
2. portable power source device as claimed in claim 1, it is characterized in that, described portable power source device also comprises described switch element, described switch element is connected in the circuit loop of described USB female seat and described portable power source device internal battery formation, and the control end of described switch element connects the switching signal output of described MCU; Described MCU realizes that by conducting or the shutoff of control switch unit described portable power source device switches between the external power supply voltage of accepting described USB female seat access and the operating state by described USB female seat release self supply voltage.
3. portable power source device as claimed in claim 2, it is characterized in that, described switch element comprises: comprise the first switching tube, be connected on the diode D1 between described the first switching tube input/output terminal, second switch pipe and be connected on diode D2 between described second switch pipe input/output terminal, the input/output terminal of described the first switching tube connects respectively power supply terminal V+ on described USB female seat and the positive pole of portable power source device internal battery BT, the control end of described the first switching tube connects the IO mouth IO2 of described MCU as first switching signal output, the input/output terminal of described second switch pipe connects respectively positive pole and the signal ground of portable power source device internal battery BT, the control end of described second switch pipe connects the IO mouth IO3 of described MCU as second switching signal output, when described MCU controls described second switch pipe shutoff by described IO mouth IO3 output switching signal, control the loop that conducting/shutoff formation utilizes external power supply that portable power source device internal battery BT is charged of described the first switching tube by described IO mouth IO2, when described MCU controls described the first switching tube and turn-offs by described IO mouth IO2 output switching signal, control the conducting of described second switch pipe/shutoffs formation by described IO mouth IO3 and utilize portable power source device internal battery BT to treat the loop that charging load is charged.
4. portable power source device as claimed in claim 1, is characterized in that, the earth connection terminal on described USB female seat is electrically connected on the shell fragment that arranges on the USB female seat and ground connection in the lump, and the switch that described fixed contact is electrically connected on described MCU detects input.
5. portable power source device as claimed in claim 1, it is characterized in that, the detection signal of described priority detecting unit output is a voltage sampling signal, described priority detecting unit has external power supply voltage when input to sample external power supply voltage signal on described USB female seat power supply terminal to described MCU in described USB female seat, described MCU receive described voltage sampling signal and described voltage sampling signal during greater than the predeterminated voltage value output switching signal control to described switch element and carry out conducting or turn-off operation, make described portable power source device accept the external power supply voltage of described USB female seat access.
6. portable power source device as claimed in claim 5, is characterized in that, described priority detecting unit comprises: divider resistance R2 and divider resistance R3; After described divider resistance R2 is connected with divider resistance R3, an end connects the power supply terminal of described USB female seat, other end ground connection; The node that described divider resistance R2 is connected with divider resistance R3 connects the priority detection signal input of described MCU.
7. portable power source device as claimed in claim 1, is characterized in that, described portable power source device also comprises: the load detecting unit; One end of described load detecting unit connects the earth connection terminal on described USB female seat, and the other end connects the load detection signal input of described MCU; Described load detecting unit load detection signal input at described MCU after the public mouth of described USB is pulled out produces a signal of telecommunication that changes, and described MCU makes described portable power source device switch to the stand-by operation attitude from the normal operation attitude according to this signal of telecommunication output one control signal.
8. portable power source device as claimed in claim 1, it is characterized in that, described shell fragment comprises a bend, described bend is for the shell of the public mouth of described USB of conflicting when public mouthful of USB inserts described USB female seat, and make the end of described bend consist of moving contact, be used for being electrically contacted described fixed contact by jack-up when public mouthful of described USB inserts described USB female seat.
9. portable power source device as claimed in claim 7, it is characterized in that, described load detecting unit comprises divider resistance R1, earth connection terminal on the described USB female seat of end connection of described divider resistance R1 and the load detection signal input of described MCU, the other end ground connection of described divider resistance R1.
10. portable power source device as claimed in claim 3, is characterized in that, the portable power source device also comprises capacitor C 1, inductance L 1; Described switch element 32 comprises diode D1, diode D2, as the PMOS of the first switching tube pipe Q1, as NMOS pipe Q2, current-limiting resistance R4, the current-limiting resistance R5 of second switch pipe; The power line terminal V+ of described USB female seat connects an end of described capacitor C 1, the source electrode of described PMOS pipe Q1 and the negative electrode of described diode D1; The other end ground connection of described capacitor C 1; The grid of described PMOS pipe Q1 connects the switching signal output of described MCU by current-limiting resistance R4, the grid of described NMOS pipe Q2 connects another switching signal output of described MCU by current-limiting resistance R5, the drain electrode of described PMOS pipe Q1 connects the anode of described diode D1, an end of described inductance L 1, the drain electrode of described NMOS pipe Q2 and the negative electrode of described diode D2, the other end of described inductance L 1 connects the positive pole of portable power source device internal battery BT, and the source electrode of described NMOS pipe Q2 connects anode and the ground connection of described diode D2.
CN 201220442477 2012-08-31 2012-08-31 Movable power supply device Expired - Fee Related CN202978308U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103698640A (en) * 2013-12-31 2014-04-02 青岛歌尔声学科技有限公司 Intelligent charging detection circuit and movable power supply
CN103779737A (en) * 2014-01-16 2014-05-07 富基电子(深圳)有限公司 Smart wall plug type USB socket
CN105871024A (en) * 2016-05-18 2016-08-17 青岛歌尔声学科技有限公司 USB wireless charging device
CN107948798A (en) * 2017-12-19 2018-04-20 歌尔股份有限公司 Charging box, wireless device and wireless headset
WO2020088388A1 (en) * 2018-10-31 2020-05-07 维沃移动通信有限公司 Charging control circuit, charging circuit and charging control method
CN112087011A (en) * 2019-06-12 2020-12-15 苏州宝时得电动工具有限公司 Battery pack

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103698640A (en) * 2013-12-31 2014-04-02 青岛歌尔声学科技有限公司 Intelligent charging detection circuit and movable power supply
CN103698640B (en) * 2013-12-31 2016-04-27 青岛歌尔声学科技有限公司 A kind of intelligent charge testing circuit and portable power source
CN103779737A (en) * 2014-01-16 2014-05-07 富基电子(深圳)有限公司 Smart wall plug type USB socket
CN103779737B (en) * 2014-01-16 2017-01-04 富基电子(深圳)有限公司 Formula USB socket inserted by intelligent wall
CN105871024A (en) * 2016-05-18 2016-08-17 青岛歌尔声学科技有限公司 USB wireless charging device
CN105871024B (en) * 2016-05-18 2019-08-30 青岛歌尔声学科技有限公司 A kind of USB wireless charging device
CN107948798A (en) * 2017-12-19 2018-04-20 歌尔股份有限公司 Charging box, wireless device and wireless headset
CN107948798B (en) * 2017-12-19 2020-02-14 歌尔股份有限公司 Charging box, wireless device and wireless earphone
WO2020088388A1 (en) * 2018-10-31 2020-05-07 维沃移动通信有限公司 Charging control circuit, charging circuit and charging control method
EP3876382A4 (en) * 2018-10-31 2021-12-01 Vivo Mobile Communication Co., Ltd. Charging control circuit, charging circuit and charging control method
US11742684B2 (en) 2018-10-31 2023-08-29 Vivo Mobile Communication Co., Ltd. Charging control circuit, charging circuit and charging control method
CN112087011A (en) * 2019-06-12 2020-12-15 苏州宝时得电动工具有限公司 Battery pack

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