CN104917271A - Adapter - Google Patents

Abstract

The invention discloses an adapter. A mobile terminal is charged through a data line, and a source end connector is used for receiving required charging voltage and required charging current from the mobile terminal. A control unit is used for obtaining the charging voltage and the charging current. The control unit is used for comparing the charging voltage and the charging current with the required charging voltage and the required charging current respectively, and a control signal is generated when the charging voltage and the charging current are different from the required charging voltage and the required charging current. A PWM (Pulse-Width Modulation) driving module is used for adjusting an output pulse signal according to the control signal so as to control the start frequency of a switch unit and change a third alternating current, and thus the charging voltage and the charging current are adjusted to the required charging voltage and the required charging current. In the charging process of the adapter, the adapter outputs voltage and current matched with the required charging voltage and the required charging current of the mobile terminal, and thus the charging effect of the mobile terminal is better.

Description

A kind of adapter

Technical field

The present invention relates to and relate to rapid nitriding field, particularly relate to a kind of adapter.

Background technology

Along with the power consumption of current mobile terminal is increasing, the capacity of its rechargeable battery is also increasing, and traditional charging modes is faced with the problems such as charge efficiency is low, spended time is long, in order to solve the slow problem of charging, introduces fast charge method.

Current fast charge method adopts the charging current of high current intensity to carry out charging process to rechargeable battery.But in charging process, the charging current of high current intensity is easy to cause the temperature of rechargeable battery too high, the infringement of too high temperature to rechargeable battery and mobile terminal is comparatively large, thus causes shorten the useful life of rechargeable battery and electric moveable terminal.

Summary of the invention

In view of this, be necessary to provide a kind of adapter causing mobile terminal charging effect better in fact.

A kind of adapter, is charged to mobile terminal by data wire.This adapter comprises power input, rectification circuit, transformer, current rectifying and wave filtering circuit, source connector, control unit, optical coupling module, PWM driver module and switch element.Rectification circuit is connected with power input, transformer, switch element respectively.Transformer is connected with current rectifying and wave filtering circuit, switch element respectively.Current rectifying and wave filtering circuit is connected with control unit, source connector respectively.Control unit is connected with source connector, optical coupling module respectively.PWM driver module is connected with optical coupling module, switch element respectively.The first alternating current that rectification circuit is used for power input inputs is converted to the first direct current.PWM driver module is used for output pulse signal with the conducting of control switch unit and closedown, so that the first direct current is converted to the second alternating current.Transformer obtains the 3rd alternating current after carrying out voltage and/current transformation to the second alternating current.Current rectifying and wave filtering circuit carries out rectifying and wave-filtering process to the 3rd alternating current and obtains charging voltage and charging current.Source connector is for receiving from mobile terminal through the charging voltage needed for data line transfer and required charging current.Control unit is for detecting charging voltage and charging current.Control unit also for charging voltage and charging current are compared with required charging voltage and required charging current respectively, when charging voltage and charging current and required charging voltage and charging current inconsistent time produce control signal.PWM driver module is transferred to after control signal carries out isolating and amplify by optical coupling module.PWM driver module according to amplify after control signal regulating impulse signal with the open frequency of control switch unit, to change the 3rd alternating current thus charging voltage and charging current be adjusted to required charging voltage and required charging current.

Preferably, rectification circuit comprises rectifier bridge.Rectifier bridge comprises two ac input ends, cathode output end and cathode output ends.Ac input end and power input are electrically connected, and cathode output end and transformer are electrically connected, and cathode output end and switch element are electrically connected.

Preferably, switch element comprises field effect transistor.The collector electrode of field effect transistor and transformer are electrically connected, the grounded emitter of field effect transistor, and base stage and the PWM driver module of field effect transistor are electrically connected.

Preferably, current rectifying and wave filtering circuit comprises diode and electric capacity.The anode of diode is connected with one end of the secondary coil of transformer, and the negative electrode of diode is connected through the other end of electric capacity with the secondary coil of transformer.It is direct current that diode is used for the 3rd AC rectification, and electric capacity is used for direct current to carry out filtering process.

Preferably, this adapter also comprises matching unit.Matching unit is arranged between current rectifying and wave filtering circuit and source connector, and connection control unit.Matching unit is for judging whether mobile terminal mates with adapter, and when mobile terminal mates with adapter, adapter is mobile terminal charging.

Preferably, control unit comprises comparator and amplifier.Comparator is connected with current rectifying and wave filtering circuit, matching unit, amplifier respectively.Amplifier is connected with optical coupling module.Comparator is used for charging voltage and charging current to compare with required charging voltage and required charging current respectively, when charging voltage and charging current and required charging voltage and charging current inconsistent time produce control signal, amplifier is used for control signal being carried out amplifications and processes.

Above-mentioned adapter in the process of charging, adapter export with needed for mobile terminal charging voltage and the voltage and current of currents match, thus make the charging effect of mobile terminal better.

Accompanying drawing explanation

Fig. 1 is a kind of quick charging system schematic diagram of execution mode.

Fig. 2 is a kind of high-level schematic functional block diagram of mobile terminal of execution mode.

Fig. 3 is a kind of high-level schematic functional block diagram of adapter of execution mode.

Fig. 4 is a kind of schematic flow sheet of fast charge method of execution mode.

Embodiment

In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not used for limiting the present invention.

As shown in Figure 1, it is a kind of quick charging system schematic diagram of execution mode.This quick charging system 99 comprises mobile terminal 100, adapter 200 and data wire 300.Mobile terminal 100 and adapter 200 are electrically connected by data wire 300.This mobile terminal 100 comprises terminator terminating junctor 101, and adapter 200 comprises source connector 206.The two ends of data wire 300 are electrically connected with terminator terminating junctor 101 and source connector 206 respectively.

As shown in Figure 2, it is a kind of high-level schematic functional block diagram of mobile terminal 100 of execution mode.This mobile terminal 100 comprises terminator terminating junctor 101, Charge Management module 102, battery 103 and electronic switch 104.Charge management module 102 goes out charging voltage needed for battery 103 and charging current for the charge condition union detecting battery 103.The charge condition of battery 103 comprises temperature, voltage and current.

Charge Management module 102 comprises voltage detection unit 1022, current detecting unit 1023, temperature detecting unit 1021 and processing module 1024.Processing module 1024 comprises judging unit 10241 and arithmetic element 10242.Current detecting unit 1023 is for detecting the present charging current value of battery 103.Voltage detection unit 1022 is for detecting the current voltage value of battery 103.Temperature detecting unit 1021 is for detecting the temperature value of battery 103.Judging unit 10241, also for judging whether current voltage value reaches default saturation voltage value.Arithmetic element 10242, when also reaching default saturation voltage value for current voltage value, controls the disconnection of electronic switch 104, so that stops charging for battery 103.Arithmetic element 10242, when also not reaching default saturation voltage value for current voltage value, controls the conducting of electronic switch 104, so that continues as battery 103 and charge.

Arithmetic element 10242 is for calculating the first charging current value according to present charging current value and the first preset rules, and arithmetic element 10242 is also for calculating the first charging voltage value according to current voltage value and the first preset rules.Judging unit 10241, for judging whether temperature exceedes default higher extreme value.Arithmetic element 10242, when also exceeding default higher extreme value for temperature, calculate the second charging current value according to the first charging current value, temperature and the second preset rules, the second charging current value is less than the first charging current value.Arithmetic element 10242 is also for calculating the second charging voltage value according to the first charging voltage value and the second preset rules.Terminator terminating junctor 101, for the second charging current value and the second charging voltage value are transferred to adapter 200 by data wire 300, exports the second charging voltage and the second charging current for adapter 200 according to the second charging current value and the second charging voltage value.This charging current needed for mobile terminal 100 and required charging voltage are the second charging voltage and the second charging current.

Judging unit 10241, also for judging whether temperature value exceedes default low extreme value.Arithmetic element 10242, also for when temperature value does not exceed default low extreme value, calculate the second charging current value according to the first charging current value, temperature and the second preset rules, the second charging current value is greater than the first charging current value.Arithmetic element 10242 is also for calculating the second charging voltage value according to the first charging voltage value and the second preset rules.Terminator terminating junctor 101, for the second charging current value and the second charging voltage value are transferred to adapter 200 by data wire 300, exports the second charging voltage and the second charging current for adapter 200 according to the second charging current value and the second charging voltage value.This charging current needed for mobile terminal 100 and required charging voltage are the second charging voltage and the second charging current.

Terminator terminating junctor 101, also for exceed default low extreme value when temperature value and temperature value does not exceed default higher extreme value time, first charging current value and the first charging voltage value are transferred to adapter 200 by data wire 300, exports the first charging voltage and the first charging current for adapter 200 according to the first charging current value and the first charging voltage value.This charging current needed for mobile terminal 100 and required charging voltage are the first charging voltage and the first charging current.

In above-mentioned mobile terminal 100, first, calculate the first magnitude of voltage and the first current value according to the magnitude of voltage detected and current value, secondly, judge whether the temperature value detected exceedes default higher extreme value, and judge whether the temperature value detected exceedes default low extreme value.Finally, when temperature value exceedes default higher extreme value or temperature value does not exceed default low extreme value, according to preset rules, required charging voltage is obtained to the first charging voltage adjustment, and according to preset rules, required charging current is obtained to the first charging current adjustment, so that the problem that rechargeable battery there will not be charging voltage high or low in charging process, therefore the useful life of rechargeable battery is extended, in addition, when battery temperature is too high or too low, the size of adjustment charging current, both rechargeable battery had been avoided at high temperature to work, ensure charge efficiency again.

As shown in Figure 3, it is a kind of high-level schematic functional block diagram of adapter of execution mode.This adapter 200 is for charging to mobile terminal 100.This adapter 200 comprises power input 201, rectification circuit 202, transformer 203, current rectifying and wave filtering circuit 204, matching unit 205, source connector 206, control unit 207, optical coupling module 208, PWM driver module 209 and switch element 210.This control unit comprises comparator 2071 and amplifier 2072.Wherein, rectification circuit 202 and power input 201 are electrically connected.Transformer 203 is electrically connected rectification circuit 202, current rectifying and wave filtering circuit 204, switch element 210 respectively.Current rectifying and wave filtering circuit 204 is electrically connected matching unit 205, control unit 207 respectively.Control unit 207 is electrically connected optical coupling module 208, matching unit 205 respectively.PWM driver module 209 is electrically connected optical coupling module 208, switch element 210 respectively.Optical coupling module 208 is electrically connected between PWM driver module 209 and control unit 207.Matching unit 205 is electrically connected source connector 206.This comparator 2071 is electrically connected current rectifying and wave filtering circuit 204 and matching unit 205 respectively, and this amplifier 2072 is electrically connected optical coupling module 208.

Rectification circuit 202 comprises two ac input end a, cathode output end b and cathode output end c.Two ac input end a are used for being electrically connected with power input 201, when power input 201 is with when providing the external power source grafting of the first alternating current, to receive this first alternating current and the first alternating current become direct current and exports.Cathode output end b is electrically connected to transformer 203, cathode output end c ground connection.

Transformer 203 comprises primary coil L1 and secondary coil L2.First end d and the cathode output end b of primary coil L1 are electrically connected, and the second end e of primary coil L1 is electrically connected to switch element 210.First end f and the second end g of secondary coil L2 are electrically connected to current rectifying and wave filtering circuit 204 respectively.

Switch element 210 comprises field effect transistor Q.The collector electrode C of field effect transistor Q and the second end e of primary coil L1 is electrically connected, and its ground level G and PWM driver module 209 are electrically connected, its emitter E ground connection.PWM driver module 209 output pulse signal is opened with closed to control field effect transistor Q, and the first direct current that rectification circuit 202 is exported is converted to the second alternating current, and transformer 203 is for being the 3rd alternating current by the second convert alternating current.

Current rectifying and wave filtering circuit 204 for the 3rd alternating current is converted to the second direct current, i.e. charging voltage V0 and charging current I0.Current rectifying and wave filtering circuit 204 comprises diode D and electric capacity C1, and the anode of diode D and the first end f of secondary coil L2 are electrically connected, and the negative electrode of diode D and one end of electric capacity C1 are electrically connected, and the other end and the secondary coil L2 second end g of electric capacity C1 are electrically connected.

Source connector 206 is electrically connected by data wire 300 and mobile terminal 100.

Matching unit 205 is for judging whether mobile terminal 100 mates with adapter 200, when mobile terminal 100 does not mate with adapter 200, matching unit 205 forbids that source connector 206 and mobile terminal 100 are electrically connected, thus adapter 200 stops charging for mobile terminal 100.When mobile terminal 100 mates with adapter 200, source connector 206 and mobile terminal 100 are electrically connected, and are required voltage V1 and the electric current I 1 of mobile terminal 100 transmission.

Control unit 207 is for detecting charging voltage V0 and charging current I0.Comparator 2071 is for by required voltage V1 and required electric current I 1 and this charging voltage V0 and charging current I0 comparison, and required voltage V1 is different from this charging voltage V0 and charging current I0 with required electric current I 1, and comparator 2071 produces control signal.Amplifier 2072 is for carrying out amplification process by this control signal.

Optical coupling module 208 transfers to PWM driver module 209 after the control signal after amplifying being carried out isolating and amplify.PWM driver module 209 adjusts the pulse signal of output with the open frequency of control switch unit 210, to change the 3rd alternating current thus charging voltage V0 and charging current I0 is adjusted to required charging voltage V1 and required charging current I1 according to this control signal.Required charging voltage V1 and required charging current I1 transfers to mobile terminal 100 through data wire 300.

When above-mentioned adapter 200 does not mate with mobile terminal 100, the adapter 200 forbidden charges for mobile terminal 100, reduces the damage of mobile terminal 100 or even explodes.In addition, the charging current value of above-mentioned adapter 200 needed for mobile terminal 100 and required charging voltage value, export required charging voltage and required charging current to mobile terminal 100 through data wire 300, the battery charging voltage that is overheated and battery in charging process avoiding mobile terminal 100 is too high or too low.

As shown in Figure 4, the schematic flow sheet of its to be Fig. 4 of a kind of execution mode be fast charge method of a kind of execution mode.Fast charge method comprises the steps:

Step S1, detects the present charging current value of rechargeable battery, current voltage value and temperature value.

Step S2, judges whether current voltage value reaches default saturation voltage value.When current voltage value does not reach default saturation voltage value, perform step S3.When current voltage value reaches default saturation voltage value, perform step S10.

Step S3, calculates the first charging current value according to present charging current value and the first preset rules, calculates the first charging voltage value according to current voltage and the first preset rules.

Step S4, judges whether temperature value exceedes default higher extreme value.When temperature value does not exceed default higher extreme value, perform step S5.When temperature value exceedes default higher extreme value, perform step S7.

Step S5, judges whether temperature value exceedes default low extreme value.Temperature value exceedes default low extreme value, performs step S6.When temperature value does not exceed default low extreme value, perform step S8.

Step S6, transfers to adapter 200 by the first charging current value and the first charging voltage value by data wire 300, exports the first charging voltage and the first charging current for adapter 200 according to the first charging current value and the first charging voltage value.

Step S7, calculate the second charging current value according to the first charging current value, temperature and the second preset rules, the second charging current value is less than the first charging current value; Calculate the second charging voltage value according to the first charging voltage value and the second preset rules, perform step S9.

Step S8, calculate the second charging current value according to the first charging current value, temperature and the second preset rules, the second charging current value is greater than the first charging current value; Calculate the second charging voltage value according to the first charging voltage value and the second preset rules, perform step S9.

Step S9, transfers to adapter 200 by the second charging current value and the second charging voltage value by data wire 300, exports the second charging voltage and the second charging current for adapter 200 according to the second charging current value and the second charging voltage value.

Step S10, when current voltage value reaches default saturation voltage value, stops the battery for mobile terminal to charge.

Be described in detail the embodiment of invention above, but it is as example, the present invention does not limit and embodiment described above.For a person skilled in the art, any equivalent modifications or alternative also all among category of the present invention that this invention is carried out, therefore, not departing from the equalization conversion and amendment, improvement etc. done under the spirit and principles in the present invention scope, all should contain within the scope of the invention.

Claims (6)

1. an adapter, is charged to mobile terminal by data wire, it is characterized in that, it comprises power input, rectification circuit, transformer, current rectifying and wave filtering circuit, source connector, control unit, optical coupling module, PWM driver module and switch element; Described rectification circuit is connected with described power input, described transformer, described switch element respectively, described transformer is connected with described current rectifying and wave filtering circuit, described switch element respectively, described current rectifying and wave filtering circuit is connected with described control unit, source connector respectively, described control unit is connected with described source connector, described optical coupling module respectively, and described PWM driver module is connected with described optical coupling module, described switch element respectively; The first alternating current that described rectification circuit is used for described power input to input is converted to the first direct current, described PWM driver module is used for output pulse signal to control conducting and the closedown of described switch element, so that described first direct current is converted to the second alternating current; Described transformer obtains the 3rd alternating current after carrying out voltage and/current transformation to described second alternating current, and described current rectifying and wave filtering circuit carries out rectifying and wave-filtering process to described 3rd alternating current and obtains charging voltage and charging current; Described source connector is for receiving from described mobile terminal through the charging voltage needed for data line transfer and required charging current; Described control unit is for detecting described charging voltage and described charging current, described control unit also for described charging voltage and described charging current are compared with described required charging voltage and described required charging current respectively, when described charging voltage and charging current with described needed for charging voltage and charging current inconsistent time produce control signal; Described PWM driver module is transferred to after described control signal carries out isolating and amplify by described optical coupling module; Described PWM driver module regulates described pulse signal to control the open frequency of described switch element according to the control signal after described amplification, to change described 3rd alternating current thus described charging voltage and charging current to be adjusted to described required charging voltage and required charging current.

2. adapter according to claim 1, it is characterized in that, described rectification circuit comprises rectifier bridge, described rectifier bridge comprises two ac input ends, cathode output end and cathode output ends, described ac input end and described power input are electrically connected, described cathode output end and described transformer are electrically connected, and described cathode output end and described switch element are electrically connected.

3. adapter according to claim 1, it is characterized in that, described switch element comprises field effect transistor, and collector electrode and the described transformer of described field effect transistor are electrically connected, the grounded emitter of described field effect transistor, base stage and the described PWM driver module of described field effect transistor are electrically connected.

4. adapter according to claim 1, it is characterized in that, described current rectifying and wave filtering circuit comprises diode and electric capacity, the anode of described diode is connected with one end of the secondary coil of described transformer, the negative electrode of described diode is connected through the other end of described electric capacity with the secondary coil of described transformer, it is direct current that described diode is used for described 3rd AC rectification, and described electric capacity is used for described direct current to carry out filtering process.

5. adapter according to claim 1, it is characterized in that, it also comprises matching unit, described matching unit is arranged between described current rectifying and wave filtering circuit and described source connector, and connect described control unit, described matching unit is for judging whether described mobile terminal mates with described adapter, and when described mobile terminal mates with described adapter, described adapter is the charging of described mobile terminal.

6. adapter according to claim 1 or 5, it is characterized in that, described control unit comprises comparator and amplifier, described comparator respectively with described current rectifying and wave filtering circuit, described matching unit, described amplifier connects, described amplifier is connected with described optical coupling module, described comparator is used for described charging voltage and described charging current to compare with described required charging voltage and described required charging current respectively, when described charging voltage and charging current and described required charging voltage and charging current inconsistent time produce control signal, described amplifier is used for described control signal being carried out amplification process.