CN104467123A - Charging method and device, charger, electronic device and electronic equipment - Google Patents

Charging method and device, charger, electronic device and electronic equipment Download PDF

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Publication number
CN104467123A
CN104467123A CN201410856068.XA CN201410856068A CN104467123A CN 104467123 A CN104467123 A CN 104467123A CN 201410856068 A CN201410856068 A CN 201410856068A CN 104467123 A CN104467123 A CN 104467123A
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Prior art keywords
voltage value
battery current
current voltage
charger
pwm ripple
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CN201410856068.XA
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CN104467123B (en
Inventor
陈良金
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • H02J7/042—
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a charging method and device, a charger, an electronic device and electronic equipment. The charging method includes the steps that when a signal, transmitted by equipment to be charged, representing the current voltage value of a battery is received, the current voltage value of the battery is obtained; according to the current voltage value of the battery, the output voltage of the charger is adjusted. By the adoption of the charging method and device, the charger, the electronic device and the electronic equipment, the power loss of a charging circuit in the charging process can be reduced.

Description

Charging method, device, charger, electronic installation and equipment
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of charging method, device, charger, electronic installation and equipment.
Background technology
In existing GB charger, the output voltage of charger is 5V, and output current is then different and different according to the nominal value of charger, is generally between 300mA ~ 1800mA.
Existing USB GB charger generally comprises four ports: VBUS port, DP port, DM port and GND port, and wherein, VBUS port is the output port of charger, and DP port and DM port are two signal ports of USB interface.By charger to charging equipment, such as, when the mobile terminals such as mobile phone charge, by detecting DM and the DP port of charger, whether short circuit judges whether current charger is GB charger to charging equipment.When determining that current charger is GB charger, charger with fixing output voltage for charging equipment charges.
But, adopt said method be charging equipment charge time, charger charges for charging equipment with fixing output voltage, there is the problem that charging circuit power loss is higher.
Summary of the invention
The problem that the embodiment of the present invention solves how to reduce the power loss of charging circuit in charging process.
For solving the problem, the embodiment of the present invention provides a kind of charging method, comprising:
When receiving the signal of the expression battery current voltage value that charging equipment sends, obtain described battery current voltage value;
According to described battery current voltage value, the output voltage of adjustment charger.
Optionally, described in when receiving the signal of expression battery current voltage value that charging equipment sends, obtain described battery current voltage value, comprising:
Receive the PWM ripple that charging equipment sends, the duty ratio of a described PWM ripple is corresponding with described battery current voltage value;
Obtain the duty ratio of a described PWM ripple, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, obtain described battery current voltage value.
Optionally, described according to described battery current voltage value, the output voltage of adjustment charger, comprising: be added with the voltage difference preset by described battery current voltage value, and using obtain with value as the output voltage after described charger adjusts.
For solving the problem, the embodiment of the present invention additionally provides a kind of charging device, comprising:
First acquiring unit, for when receiving the signal of the expression battery current voltage value that charging equipment sends, obtains described battery current voltage value;
First adjustment unit, for according to described battery current voltage value, adjusts the output voltage of charger.
Optionally, described first acquiring unit is used for: receive the PWM ripple that charging equipment sends, the duty ratio of a described PWM ripple is corresponding with described battery current voltage value;
Obtain the duty ratio of a described PWM ripple, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, obtain described battery current voltage value.
Optionally, described first adjustment unit is used for described battery current voltage value to be added with the voltage difference preset, and using obtain with value as the output voltage after described charger adjusts.
For solving the problem, the embodiment of the present invention additionally provides a kind of charger, comprising: PWM feedback circuit and electric pressure converter, wherein:
Described PWM feedback circuit, is suitable for the PWM ripple receiving charging equipment transmission, obtains the battery current voltage value of described charging equipment corresponding to a described PWM ripple;
Described electric pressure converter, is suitable for according to described battery current voltage value, the output voltage of adjustment charger.
Optionally, described PWM feedback circuit comprises: sample circuit, is suitable for sampling to a described PWM ripple, to obtain the duty ratio of a described PWM ripple.
Optionally, described sample circuit comprises adc circuit.
Optionally, described PWM feedback circuit comprises: low pass filter; With ADC or the operational amplifier of described low pass filter coupled.
Optionally, described electric pressure converter is AC-DC converter or dc-dc.
Optionally, when described electric pressure converter is AC-DC converter, isolator is set between described AC-DC converter and described PWM feedback circuit, is suitable for described AC-DC converter and described PWM feedback circuit physical isolation.
Optionally, described isolator is Light Coupled Device.
The embodiment of the present invention additionally provides a kind of charging method, comprising: when receiving the signal representing battery current voltage value, obtain described battery current voltage value; According to described battery current voltage value, the output voltage of adjustment charger.
Optionally, described when receiving the signal representing battery current voltage value, obtain described battery current voltage value, comprise: receive a PWM ripple, obtain the duty ratio of a described PWM ripple, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, obtain described battery current voltage value.
Optionally, described according to described battery current voltage value, the output voltage of adjustment charger, comprising: be added with the voltage difference preset by described battery current voltage value, and using obtain with value as the output voltage after described charger adjusts.
The embodiment of the present invention additionally provides another kind of charging device, comprising: the first acquiring unit, for when receiving the signal representing battery current voltage value, obtains described battery current voltage value; First adjustment unit, for according to described battery current voltage value, adjusts the output voltage of charger.
Optionally, described first acquiring unit, for receiving a PWM ripple, obtains the duty ratio of a described PWM ripple, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, obtain described battery current voltage value, the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
Optionally, described first adjustment unit is used for described battery current voltage value to be added with the voltage difference preset, and using obtain with value as the output voltage after described charger adjusts.
The embodiment of the present invention additionally provides a kind of charger, comprising: PWM feedback circuit and electric pressure converter, wherein: described PWM feedback circuit, is suitable for reception the one PWM ripple, obtains the battery current voltage value that a described PWM ripple is corresponding; Described electric pressure converter, is suitable for according to described battery current voltage value, the output voltage of adjustment charger.
Optionally, described PWM feedback circuit comprises: sample circuit, is suitable for sampling to a described PWM ripple, to obtain the duty ratio of a described PWM ripple.
Optionally, described sample circuit comprises adc circuit.
Optionally, described PWM feedback circuit comprises: low pass filter; With ADC or the operational amplifier of described low pass filter coupled.
Optionally, described low pass filter comprise following any one: low-pass first order filter, second-order low-pass filter.
Optionally, described electric pressure converter is AC-DC converter or dc-dc.
Optionally, when described electric pressure converter is AC-DC converter, isolator is set between described AC-DC converter and described PWM feedback circuit, is suitable for described AC-DC converter and described PWM feedback circuit physical isolation.
Optionally, described isolator is Light Coupled Device.
The embodiment of the present invention additionally provides a kind of charging method of charging equipment, comprising: obtain battery current voltage value; To represent that the signal of described battery current voltage value is sent to charger.
Optionally, the signal of the described battery current voltage value of described expression is a PWM ripple, and the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
The embodiment of the present invention additionally provides a kind of device to be charged, comprising: second acquisition unit, for obtaining battery current voltage value; Second transmitting element, for representing that the signal of described battery current voltage value is sent to charger.
Optionally, described second transmitting element is used for a PWM ripple to be sent to charger, and the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
The embodiment of the present invention additionally provides a kind of charging equipment, comprise: PWM output circuit, described PWM output circuit is suitable for the battery current voltage value obtaining charging equipment, described battery current voltage value is converted to a PWM ripple of duty ratio corresponding, and is sent to charger.
Optionally, described PWM output circuit comprises: comparator; The saw-toothed wave generator coupled with described comparator.
The embodiment of the present invention additionally provides another charging method, comprising: obtain battery current voltage value; To represent that the signal of described battery current voltage value sends.
Optionally, the signal of the described battery current voltage value of described expression is a PWM ripple, and the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
The embodiment of the present invention additionally provides another electronic installation, comprising: second acquisition unit, for obtaining battery current voltage value; Second transmitting element, for sending the signal of the described battery current voltage value of mark.
Optionally, described second transmitting element is used for a PWM ripple to send, and the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
The embodiment of the present invention additionally provides a kind of electronic equipment, comprising: PWM output circuit, and described PWM output circuit is suitable for obtaining battery current voltage value, described battery current voltage value is converted to a PWM ripple of duty ratio corresponding and sends.
Optionally, described PWM output circuit comprises: comparator; The saw-toothed wave generator coupled with described comparator.
Compared with prior art, the technical scheme of the embodiment of the present invention has the following advantages:
Charger, by receiving the signal of the expression battery current voltage value of charging equipment transmission, obtains the current voltage value of battery, adjusts according to battery current voltage value to output voltage, instead of exports with fixing voltage.In charging process, the output voltage of charger changes with cell voltage and changes, when the output current of charger is constant, reduce the output voltage of charger, the difference between the output voltage of charger and the magnitude of voltage of battery can be made to reduce, thus can reduce in the loss of charging circuit in charging process.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of charging method in the embodiment of the present invention;
Fig. 2 is the structural representation of a kind of charging device in the embodiment of the present invention;
Fig. 3 is the structural representation of a kind of charger in the embodiment of the present invention;
Fig. 4 is the structural representation of a kind of PWM feedback circuit in the embodiment of the present invention;
Fig. 5 is the structural representation of the another kind of PWM feedback circuit in the embodiment of the present invention;
Fig. 6 is the structural representation of the another kind of charger in the embodiment of the present invention;
Fig. 7 is the flow chart of the another kind of charging method in the embodiment of the present invention;
Fig. 8 is the charging method flow chart of a kind of charging equipment in the embodiment of the present invention;
Fig. 9 is the structural representation of the device a kind of to be charged in the embodiment of the present invention;
Figure 10 is the structural representation of a kind of PWM output circuit in the embodiment of the present invention;
Figure 11 is the another kind of charging method flow chart in the embodiment of the present invention.
Embodiment
By USB charger to charging equipment, such as, when the mobile terminals such as mobile phone charge, by detecting DM and the DP port of charger, whether short circuit judges whether current charger is GB charger to charging equipment.When determining that current charger is GB charger, charger with fixing output voltage for charging equipment charges.But, adopt said method be charging equipment charge time, charger charges for charging equipment with fixing output voltage, there is the problem that charging circuit power loss is higher.
In embodiments of the present invention, charger, by receiving the signal of the expression battery current voltage value of charging equipment transmission, obtains the current voltage value of battery, adjusts according to battery current voltage value to output voltage, instead of exports with fixing voltage.In charging process, the output voltage of charger changes with cell voltage and changes, when the output current of charger is constant, reduce the output voltage of charger, the difference between the output voltage of charger and the magnitude of voltage of battery can be made to reduce, thus can reduce in the power loss of charging circuit in charging process.
For enabling above-mentioned purpose, the feature and advantage of the embodiment of the present invention more become apparent, below in conjunction with accompanying drawing, specific embodiments of the invention are described in detail.
Embodiments provide a kind of charging method, with reference to Fig. 1, be described in detail below by way of concrete steps.
Step S101, when receiving the signal of the expression battery current voltage value that charging equipment sends, obtains described battery current voltage value.
In concrete enforcement, charging equipment can the equipment of device of storage of electrical energy for any including, and charger can for having the charger of USB interface.Such as, charging equipment can be mobile phone terminal, panel computer etc., and also can be that charger baby, portable power source etc. can the equipment of storage of electrical energy, can also be other equipment, can the device of storage of electrical energy as long as comprise, and does not repeat herein.
In embodiments of the present invention, in charging process, the voltage of battery can change along with charging duration.Charging equipment can the current voltage value of Real-time Obtaining battery, and sends the signal representing battery current voltage value to charger.Charger, after the signal receiving the expression battery current voltage value that charging equipment sends, can obtain battery current voltage value, and perform step S102.
In an embodiment of the present invention, the signal of the expression battery current voltage value of charging equipment transmission is a PWM ripple of certain duty ratio.PWM ripple generating apparatus is set in charging equipment, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, by PWM ripple generating apparatus, battery current voltage value is converted to a PWM ripple of duty ratio corresponding, and a PWM ripple is sent to charger.In other embodiments of the present invention, the signal of the expression battery current voltage value that charging equipment sends can also be other forms of signal, does not repeat herein.
In an embodiment of the present invention, the PWM ripple generating apparatus arranged in charging equipment comprises comparator.Comparator, by comparing the magnitude of voltage of two input inputs, exports corresponding high level or low level.According to the corresponding relation of magnitude of voltage and the PWM ripple duty ratio preset, the duty ratio of the PWM ripple that acquisition battery current voltage value is corresponding.The first input end input sawtooth waveforms of comparator, the second input inputs a corresponding magnitude of voltage V1, by mutually in the same time V1 compare in the magnitude of voltage that sawtooth waveforms is corresponding, export high level or low level.By adjustment magnitude of voltage V1, namely produce a PWM ripple of duty ratio corresponding by comparator.
In an embodiment of the present invention, the corresponding relation of magnitude of voltage V1 and PWM ripple duty ratio can be set up in advance, such as, PWM ripple duty ratio corresponding during magnitude of voltage V1=1.4V is 70%, PWM ripple duty ratio corresponding during magnitude of voltage V1=1.2V is 60% etc., thus, when getting the duty ratio of a PWM ripple corresponding to charging equipment battery current voltage value, second input of comparator inputs default magnitude of voltage V1=1.4V, thus generates the PWM ripple that duty ratio is 70%.
Such as, for mobile terminals such as mobile phones, the voltage of the lithium battery of use or the battery of other types generally all more than 5V, can not be generally 4.2V or 4.35V.When normally working, the minimum voltage of battery is generally not less than 3V.The PWM ripple duty ratio that setting 5V is corresponding is the PWM ripple duty ratio that 100%, 3V is corresponding is 20%, then battery current voltage value V bATcorresponding PWM ripple duty ratio is Duty=(V bAT-3)/(5-3) * 80%+20%.
Battery current voltage value is V bAT=4V, then the PWM ripple duty ratio that battery current voltage value is corresponding is Duty=(4-3)/(5-3) * 80%+20%=60%.According to the magnitude of voltage V1 preset and the corresponding relation of PWM ripple duty ratio, during V1=1.2V, comparator produces the PWM ripple that duty ratio is 60%, therefore, and the second input input 1.2V of comparator, thus the PWM ripple that duty ratio is 60% can be produced, and be sent to charger.
Received a PWM ripple of charging equipment transmission by PWM wave receiving device, and the duty ratio getting a PWM ripple is 60%.According to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, charger can know that the battery current voltage value of charging equipment is 4V.
Be understandable that, the corresponding relation of battery current voltage value and PWM ripple duty ratio is not limited in the corresponding relation provided in the above embodiment of the present invention, can also there is other forms of corresponding relation, not repeat herein.
Step S102, according to described battery current voltage value, the output voltage of adjustment charger.
In concrete enforcement, charger is after getting battery current voltage value, the current voltage value of the battery got and the voltage difference preset can be carried out sum operation, obtain with value as the charger output voltage after adjustment, the output voltage of charger namely after adjustment is the current voltage value of battery and the voltage difference sum preset.
In embodiments of the present invention, the voltage difference preset can be measured in advance and obtain, and its implication can be: can meet the difference between the output voltage values of charger during charger output rated current and battery voltage value.In actual applications, the voltage difference preset can be between 0.4V ~ 0.6V, also can be other values.In an embodiment of the present invention, the voltage difference preset is 0.5V.
Such as, charger knows that the battery current voltage value of charging equipment is 4V, and default voltage difference is 0.5V, then the output voltage values of the charger after adjustment is 4.5V, and namely charger exports with the voltage of 4.5V.
Adopt linear-charging mode for charging equipment, in prior art, the output voltage values of setting charger is 5V, and output current value is 1A, and namely the power output of charger is 5W.The battery current voltage value of charging equipment is 3.2V, in linear-charging mode, the input current of charging equipment electric current can be equal with the output current of charger, and namely the input current of the battery of charging equipment is 1A, then the current input power of battery is 3.2W.Difference between the power output of charger and the current input power of battery is 5W-3.2W=1.8W, namely has the energy of 1.8W to be wasted.
And adopt the method in the embodiment of the present invention, battery current voltage value is 3.2V, charging equipment sends the signal representing battery current voltage value to charger, charger is known, and battery current voltage value is 3.2V, battery current voltage value is added with the voltage difference preset, the voltage difference preset is 0.5V, charger output voltage after being then adjusted is 3.7V, the output current of charger remains unchanged, be still 1A, then the power output of charger is 3.7W, the current input power of battery is 3.2W, difference between the output power value of charger and the current input power of battery is 3.7W-3.2W=0.5W, namely the energy of 0.5W is only had to be wasted.Be wasted compared to the energy of 1.8W of the prior art, the embodiment of the present invention greatly reduces the power loss of charging circuit in charging process.
As can be seen here, charger, by receiving the signal of the expression battery current voltage value of charging equipment transmission, obtains the current voltage value of battery, adjusts according to battery current voltage value to output voltage, instead of exports with fixing voltage.In charging process, the output voltage of charger changes with cell voltage and changes, when the output current of charger is constant, reduce the output voltage of charger, the difference between the output voltage of charger and the magnitude of voltage of battery can be made to reduce, thus can reduce in the power loss of charging circuit in charging process.
In embodiments of the present invention, for realizing charging more rapidly, the embodiment of the present invention additionally provides another kind of charging method, after step S102 is complete, can also perform following operation:
Send the signal comprising current nominal output current value to described charging equipment, make described charging equipment according to described current nominal output current value adjustment preset charged current value, and charge with the charging current value after adjustment.
In concrete enforcement, charger is when to charging equipment output current, and the current value of output can be the output-current rating value of charger.Charger, while charging equipment output current, can send to charging equipment the signal comprising current nominal output current value, make charging equipment upon receipt of the signal, can obtain the current nominal output current value of charger.The signal that charger sends to charging equipment can signal to include numerous forms, as long as meet the current nominal output current value that charging equipment can obtain charger.
In embodiments of the present invention, when charger is in holding state, the DP port of charger and DM port short circuit.Charger detects the magnitude of voltage on DP port in real time, when detecting that the duration of the magnitude of voltage on DP port higher than preset voltage value reaches preset duration, DM port and DP port disconnect by charger, send the signal comprising current nominal output current value to charging equipment.
In an embodiment of the present invention, charger detects the magnitude of voltage on DP port in real time.When charging equipment is connected with charger, charging equipment sends signal to charger, such as, send the mode of request signal or enable signal, the voltage on the DP port of charger is raised.When the duration that the voltage on DP port is elevated to Vth reaches preset duration, the DM port of short circuit and DP port disconnect by charger, and send the signal comprising current nominal output current value to charging equipment.
In embodiments of the present invention, according to step S101 ~ step S102, charger is after adjusting output voltage, output-current rating value before the output-current rating value that output voltage values after adjustment is corresponding adjusts with output voltage is equal, and charger sends the signal comprising current nominal output current value to charging equipment.
In an embodiment of the present invention, the signal comprising current nominal output current value that charger sends is the 2nd PWM ripple of certain duty ratio.PWM ripple generating apparatus is set in charger, according to the current value preset and the corresponding relation of PWM ripple duty ratio, the current nominal output current value of charger is converted to the 2nd PWM ripple of duty ratio corresponding, and the 2nd PWM ripple is sent to charging equipment.
In an embodiment of the present invention, PWM ripple generating apparatus can be comparator, the first input end input sawtooth waveforms of comparator, the second input input needs the magnitude of voltage that the current nominal output current value of the charger of modulation is corresponding, thus can produce the 2nd PWM ripple of duty ratio corresponding.
Such as, the output-current rating value of current charger is 2A, and corresponding magnitude of voltage is 5V, then at the magnitude of voltage 5V that the second input input 2A of comparator is corresponding, thus can produce the 2nd PWM ripple of duty ratio corresponding.
In other embodiments of the present invention, the PWM ripple generating apparatus in charger also can be that other can generate the device of PWM ripple, does not repeat herein.
PWM wave receiving device can be set at charging equipment end, receive the 2nd PWM ripple of charger transmission at PWM wave receiving device after, obtain the duty ratio that the 2nd PWM ripple is corresponding, according to the current value preset and the corresponding relation of PWM ripple duty ratio, the current nominal output current value of charger can be obtained.
The maximum current bearing capacity of setting generic USB interface is maxoutA, be the current value of 100% correspondence as PWM ripple duty ratio using maxoutA, charger current nominal output current value is maxA, and maxA < maxoutA, be then (maxA/maxoutA) × 100% by the duty ratio of PWM ripple corresponding for current nominal output current value.Charging equipment, after the PWM ripple receiving charger transmission, can obtain the duty ratio of the PWM ripple received, the corresponding relation of the current value preset according to charger end and PWM ripple duty ratio, can know the current nominal output current value of charger.
Such as, the maximum current bearing capacity of generic USB interface is 2.5A, charger current nominal output current value and load current value are 2A, then the duty ratio of the PWM ripple that current nominal output current value is corresponding is: 2/2.5 × 100%=80%, and namely charger sends to charging equipment the PWM ripple that duty ratio is 80%.Charging equipment is after receiving the PWM ripple that charger sends, and the duty ratio getting PWM ripple is 80%, according to the current value preset and the corresponding relation of PWM ripple duty ratio, can know that charger current nominal output current value is 2A.
In other embodiments of the present invention, PWM ripple duty ratio corresponding to charger current nominal output current value can also be obtained by other compute mode, not repeat herein.
In embodiments of the present invention, the charging modes for charging equipment is different, when the output current value of charger is identical, and the charging current I of corresponding charging equipment cHGcan not be identical.In actual applications, the charging modes of charging equipment can be linear-charging.
When the charging modes of charging equipment is linear-charging, I cHGequal with the output current value of charger.At the charging current value I that the output-current rating value getting charger is corresponding cHGafterwards, can by I cHGwith the preset charged current value I of charging equipment 0compare.Work as I cHG> I 0time, the preset charged electric current of charging equipment can be adjusted to I cHGor be slightly less than I cHG, and with I cHGor be slightly less than I cHGcurrent value charge, thus realize quick charge.Work as I cHG≤ I 0time, can with I cHGor be slightly less than I cHGcurrent value charge, thus when quick charge as far as possible, protection charger.
As can be seen here, sent the signal comprising current nominal output current value to charging equipment by charger, make charging equipment obtain the current nominal output current value of charger, and charging current is adjusted, instead of only charge with fixing preset charged current value.When the charging current value that the current nominal output current value of charger is corresponding is greater than the charging current of fixing of charging equipment, the charging current of adjustment charging equipment, the charging current value after adjusting is made to be greater than fixing preset charged current value, the output current of charger can be made full use of, thus realize quick charge.
With reference to Fig. 2, embodiments provide a kind of charging device 20, comprising: the first acquiring unit 201 and the first adjustment unit 202, wherein:
First acquiring unit 201, for when receiving the signal of the expression battery current voltage value that charging equipment sends, obtains described battery current voltage value;
First adjustment unit 202, for according to described battery current voltage value, adjusts the output voltage of charger.
In concrete enforcement, described first acquiring unit 201 may be used for: receive the PWM ripple that charging equipment sends, the duty ratio of a described PWM ripple is corresponding with described battery current voltage value; Obtain the duty ratio of a described PWM ripple, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, obtain described battery current voltage value.
In concrete enforcement, described first adjustment unit 202 may be used for described battery current voltage value to be added with the voltage difference preset, and using obtain with value as the output voltage after described charger adjusts.
In embodiments of the present invention, described default voltage difference can be 0.4V ~ 0.6V.
The embodiment of the present invention additionally provides a kind of charger, with reference to Fig. 3, comprising: PWM feedback circuit 301 and electric pressure converter 302, wherein:
Described PWM feedback circuit 301, is suitable for the PWM ripple receiving charging equipment transmission, obtains the battery current voltage value of described charging equipment corresponding to a described PWM ripple.
In embodiments of the present invention, in charging process, can send by charging equipment the PWM ripple representing battery current voltage value to charger.Battery current voltage value according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, can be converted to a PWM ripple of duty ratio corresponding, and is sent to charger by charging equipment.
Such as, the battery current voltage value of charging equipment is 4V, and according to the corresponding relation of magnitude of voltage and the PWM ripple duty ratio preset, the PWM ripple duty ratio that 4V is corresponding is 60%, then charging equipment is the PWM ripple of 60% to charger transmission duty ratio.
In embodiments of the present invention, PWM feedback circuit 301 can comprise sample circuit, is sampled to a PWM ripple by sample circuit, thus can obtain the duty ratio of a PWM ripple, and then obtains battery current voltage value corresponding to a PWM ripple.
In an embodiment of the present invention, sample circuit can comprise high frequency clock circuit.Produce high-frequency impulse by high frequency clock circuit, respectively step-by-step counting is carried out to the high level of a PWM ripple and low level.The umber of pulse corresponding according to high level and umber of pulse corresponding to low level, can know the duty ratio of a PWM ripple.The magnitude of voltage that basis is default again and the corresponding relation of PWM ripple duty ratio, can know battery current voltage value, and battery current voltage value is sent to electric pressure converter 302.
PWM feedback circuit 301 can also be the circuit of other types.In an embodiment of the present invention, PWM feedback circuit 301 comprises low pass filter and the ADC with low pass filter coupled, by low pass filter, the one PWM ripple is converted to the direct current signal of corresponding voltage value, obtain magnitude of voltage corresponding to direct current signal by ADC, and magnitude of voltage corresponding for direct current signal is sent to electric pressure converter 302.
With reference to Fig. 4, give the structural representation of a kind of PWM feedback circuit in the embodiment of the present invention, comprising: low pass filter and an ADC, low pass filter can be made up of resistance R1 and electric capacity C1.Below the workflow of said PWM feedback circuit is illustrated.
The duty ratio of the one PWM ripple is 60%, and corresponding magnitude of voltage is 4V.The high level of the one PWM ripple is 3V, and low level is 0V.Carry out filtering by low pass filter to a PWM ripple, convert a PWM ripple to a direct current signal, and be sent to ADC, the magnitude of voltage of direct current signal is 3V × 60%=1.8V.The voltage that ADC collects the direct current signal of current input is 1.8V, can know that the duty ratio of a PWM ripple is 60%, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, can know that the battery current voltage value that a PWM ripple is corresponding is 4V, send to electric pressure converter 302 signal that battery current voltage value is 4V.
In an alternative embodiment of the invention, PWM feedback circuit 301 comprises low pass filter and the operational amplifier with low pass filter coupled, by low pass filter, the one PWM ripple is converted to the direct current signal of corresponding voltage value, by operational amplifier, in proportion convergent-divergent is carried out to the magnitude of voltage of direct current signal, magnitude of voltage after convergent-divergent is within the working range of electric pressure converter 302, and is sent to electric pressure converter 302.Such as, by operational amplifier, in proportion convergent-divergent is carried out to the magnitude of voltage of direct current signal, the magnitude of voltage after convergent-divergent is within the working range of the Circuit tuning of electric pressure converter 302.Electric pressure converter 302, according to the ratio transformational relation preset, can know the battery current voltage value that a PWM ripple is corresponding.
With reference to Fig. 5, give the structural representation of the another kind of PWM feedback circuit in one embodiment of the invention, comprise: low pass filter and an operation amplifier circuit, low pass filter can be made up of resistance R2 and electric capacity C2, operation amplifier circuit can comprise operational amplifier A 1 and resistance R3 and R4 forms, and is illustrated below to the workflow of said PWM feedback circuit.
The duty ratio of the one PWM ripple is 60%, and corresponding magnitude of voltage is 4V.The high level of the one PWM ripple is 3V, and low level is 0V.Carry out filtering by RC low pass filter to a PWM ripple, convert a PWM ripple to a direct current signal, and be sent to "+" input of operational amplifier A 1, the magnitude of voltage of direct current signal is 3V × 60%=1.8V.The working range of the Circuit tuning of electric pressure converter 302 is 0.5V ~ 1V, then by operational amplifier A 1, the magnitude of voltage of input is scaled to 0.6V, and is input to electric pressure converter 302.When electric pressure converter 302 Circuit tuning be input as 0.6V time, electric pressure converter exports the voltage of 4V.
State on the invention in embodiment, low pass filter can be low-pass first order filter, also can be the low pass filter of second-order low-pass filter or other types.Such as, in an embodiment of the present invention, adopt low-pass first order filter as low pass filter, filtering process is carried out to the PWM ripple received.And in an alternative embodiment of the invention, then adopt second-order low-pass filter as low pass filter.
Be understandable that, in concrete enforcement, the structure of PWM feedback circuit is not limited in several structures provided in the above embodiment of the present invention, other forms of structure can also be comprised, as long as battery current voltage value corresponding to a PWM ripple can be obtained and be sent to electric pressure converter, do not repeat herein.
Described electric pressure converter 302, is suitable for according to described battery current voltage value, the output voltage of adjustment charger.
In embodiments of the present invention, electric pressure converter 302 is after the battery current voltage value receiving the charging equipment that PWM feedback circuit 301 sends, the output voltage of charger can be adjusted according to battery current voltage value, make the output voltage of charger meet the demand of charging equipment.
In an embodiment of the present invention, the output voltage of charger is adjusted to by electric pressure converter 302: battery current voltage value and the voltage difference sum preset.
Such as, PWM feedback circuit 301 detects that battery current voltage value is 4V, and default voltage difference is 0.5V, and battery current voltage value and the voltage difference preset are sued for peace, the output voltage values obtaining charger should be 4.5V.The battery current voltage value that electric pressure converter 302 receives PWM feedback circuit 301 transmission is the signal of 4V, exports and adjusts, the current output voltage value of charger is adjusted to 4.5V to the current voltage of charger.
And for example, the voltage that electric pressure converter 302 receives is 0.7V, according to the corresponding relation preset, learns that the battery current voltage value that 0.7V is corresponding is 4V, the voltage difference preset is 0.5V, and therefore the current output voltage value of charger is adjusted to 4.5V by electric pressure converter.
In embodiments of the present invention, electric pressure converter 302 can be AC-DC converter, also can be dc-dc.When electric pressure converter is AC-DC converter, because the voltage at PWM feedback circuit 301 two ends is lower, be generally less than and equal 20V, and the magnitude of voltage of AC-DC side is higher, beyond the scope of human safety voltage, for the sake of security, isolating device can be set between AC-DC converter and PWM feedback circuit, by AC-DC converter and PWM feedback circuit physical isolation, thus the potential safety hazard that exists because human body contacts by mistake can be avoided.
In an embodiment of the present invention, isolator is Light Coupled Device.Isolator can also be the device of other types, as long as meet AC-DC change-over circuit and PWM feedback circuit physical isolation, repeats no more herein.
Be described in detail below by the workflow of instantiation to the charger that the above embodiment of the present invention provides.
Charging equipment, can the current voltage value of Real-time Obtaining battery after receiving the output current of charger, and sends the signal representing battery current voltage value to charger.The battery current voltage value of charging equipment is 4V.Corresponding relation according to the magnitude of voltage preset and PWM ripple duty ratio can be learnt, the duty ratio of the PWM ripple that 4V is corresponding is 60%.Therefore, charging equipment sends to charger the PWM ripple that duty ratio is 60% by the PWM ripple generating apparatus preset.
Charger receives a PWM ripple by PWM feedback circuit 301, and after low pass filter is to a PWM ripple filtering, the duty ratio being obtained a PWM ripple by sample circuit is 60%, it can thus be appreciated that battery current voltage value is 4V.Battery current voltage value is that the signal of 4V is sent to AC-DC by PWM feedback circuit 301, and default voltage difference is that the output voltage values of charger carries out being adjusted to 4.5V by 0.5V, AC-DC.
To sum up, can realize being adjusted by the output voltage of charging equipment to charger.
With reference to Fig. 6, give the structural representation of a kind of charger in the present invention one enforcement, comprising: PWM feedback circuit 601, AC-DC converter 602, isolating device 603 and switching power circuit 604.
The PWM feedback circuit 601 of charger, by a PWM ripple of DP port accepts charging equipment transmission, obtains the duty ratio of a PWM ripple, thus obtains battery current voltage value.Current voltage value signal is sent to AC-DC converter 602 by isolating device 603, AC-DC converter 602 is according to battery current voltage value, obtain the output voltage of corresponding charger, control switch power circuit 604 is generated corresponding output voltage and is exported by VBUS port.
Be understandable that, in embodiments of the present invention, dc-dc can also be adopted to substitute AC-DC converter 602.When adopting dc-dc to substitute AC-DC converter 602, isolating device 603 can correspondingly save.Feedback circuit is set between dc-dc and PWM feedback circuit 601, feeds back battery current voltage value by feedback circuit to DC-DC.
The embodiment of the present invention additionally provides another kind of charging method, with reference to Fig. 7, is described in detail below by way of concrete steps.
Step S701, when receiving the signal representing battery current voltage value, obtains described battery current voltage value.
In concrete enforcement, the signal of the expression battery current voltage value that charger receives can be the first PWM ripple signal, and the duty ratio of a PWM ripple signal is corresponding with battery current voltage value.Can by the duty ratio of acquisition the one PWM ripple, according to the corresponding relation of the magnitude of voltage preset with PWM ripple duty ratio, acquisition battery current voltage value.
In embodiments of the present invention, the detailed process obtaining battery current voltage value with reference to the step S101 in the above embodiment of the present invention, can repeat no more herein.
Step S702, according to described battery current voltage value, the output voltage of adjustment charger.
In concrete enforcement, after getting battery current voltage value, the battery current voltage value got can be added with the voltage difference preset, and using obtain with value as the output voltage after charger adjusts.
In embodiments of the present invention, the adjustment process of the output voltage of charger with reference to the step S102 in the above embodiment of the present invention, can repeat no more herein.
Embodiments provide a kind of charging device, with reference to Fig. 2, can comprise: the first acquiring unit and the first adjustment unit, wherein:
First acquiring unit, for when receiving the signal representing battery current voltage value, obtains described battery current voltage value;
First adjustment unit, for according to described battery current voltage value, adjusts the output voltage of charger.
In concrete enforcement, described first acquiring unit may be used for reception the one PWM ripple, obtain the duty ratio of a described PWM ripple, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, obtain described battery current voltage value, the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
In concrete enforcement, described first adjustment unit may be used for described battery current voltage value to be added with the voltage difference preset, and using obtain with value as the output voltage after described charger adjusts.
The embodiment of the present invention provides a kind of charger, with reference to Fig. 3, can comprise: PWM feedback circuit and electric pressure converter, wherein:
Described PWM feedback circuit, is suitable for reception the one PWM ripple, obtains the battery current voltage value that a described PWM ripple is corresponding;
Described electric pressure converter, is suitable for according to described battery current voltage value, the output voltage of adjustment charger.
In concrete enforcement, described PWM feedback circuit comprises: sample circuit, is suitable for sampling to a described PWM ripple, to obtain the duty ratio of a described PWM ripple.
In concrete enforcement, described sample circuit comprises adc circuit.
In concrete enforcement, described PWM feedback circuit comprises: low pass filter; With ADC or the operational amplifier of described low pass filter coupled.
In concrete enforcement, described low pass filter comprise following any one: low-pass first order filter, second-order low-pass filter.
In concrete enforcement, described electric pressure converter is AC-DC converter or dc-dc.
In concrete enforcement, when described electric pressure converter is AC-DC converter, isolator is set between described AC-DC converter and described PWM feedback circuit, is suitable for described AC-DC converter and described PWM feedback circuit physical isolation.
In concrete enforcement, described isolator is Light Coupled Device.
The embodiment of the present invention additionally provides a kind of charging method of charging equipment, with reference to Fig. 8, is described in detail below by way of concrete steps.
Step S801, obtains battery current voltage value.
Step S802, will represent that the signal of described battery current voltage value is sent to charger.
In an embodiment of the present invention, the signal of the expression battery current voltage value of charging equipment transmission is a PWM ripple of certain duty ratio.PWM ripple generating apparatus is set in charging equipment, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, by PWM ripple generating apparatus, battery current voltage value is converted to a PWM ripple of duty ratio corresponding, and a PWM ripple is sent to charger.In other embodiments of the present invention, the signal of the expression battery current voltage value that charging equipment sends can also be other forms of signal, does not repeat herein.
In an embodiment of the present invention, the PWM ripple generating apparatus arranged in charging equipment comprises comparator.Comparator, by comparing the magnitude of voltage of two input inputs, exports corresponding high level or low level.According to the corresponding relation of magnitude of voltage and the PWM ripple duty ratio preset, the duty ratio of the PWM ripple that acquisition battery current voltage value is corresponding.The first input end input sawtooth waveforms of comparator, the second input inputs a corresponding magnitude of voltage V1, by mutually in the same time V1 compare in the magnitude of voltage that sawtooth waveforms is corresponding, export high level or low level.By adjustment magnitude of voltage V1, namely produce a PWM ripple of duty ratio corresponding by comparator.
In an embodiment of the present invention, the corresponding relation of magnitude of voltage V1 and PWM ripple duty ratio can be set up in advance, such as, PWM ripple duty ratio corresponding during magnitude of voltage V1=1.4V is 70%, PWM ripple duty ratio corresponding during magnitude of voltage V1=1.2V is 60% etc., thus, when getting the duty ratio of a PWM ripple corresponding to charging equipment battery current voltage value, second input of comparator inputs default magnitude of voltage V1=1.4V, thus generates the PWM ripple that duty ratio is 70%.
Such as, for mobile terminals such as mobile phones, the voltage of the lithium battery of use or the battery of other types generally all more than 5V, can not be generally 4.2V or 4.35V.When normally working, the minimum voltage of battery is generally not less than 3V.The PWM ripple duty ratio that setting 5V is corresponding is the PWM ripple duty ratio that 100%, 3V is corresponding is 20%, then battery current voltage value V bATcorresponding PWM ripple duty ratio is Duty=(V bAT-3)/(5-3) * 80%+20%.
Battery current voltage value is V bAT=4V, then the PWM ripple duty ratio that battery current voltage value is corresponding is Duty=(4-3)/(5-3) * 80%+20%=60%.According to the magnitude of voltage V1 preset and the corresponding relation of PWM ripple duty ratio, during V1=1.2V, comparator produces the PWM ripple that duty ratio is 60%, therefore, and the second input input 1.2V of comparator, thus the PWM ripple that duty ratio is 60% can be produced, and be sent to charger.
Received a PWM ripple of charging equipment transmission by PWM wave receiving device, and the duty ratio getting a PWM ripple is 60%.According to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, charger can know that the battery current voltage value of charging equipment is 4V.
Be understandable that, the corresponding relation of battery current voltage value and PWM ripple duty ratio is not limited in the corresponding relation provided in the above embodiment of the present invention, can also there is other forms of corresponding relation, not repeat herein.
With reference to Fig. 9, the embodiment of the present invention additionally provides a kind of device to be charged 90, comprising: second acquisition unit 901 and the second transmitting element 902, wherein:
Second acquisition unit 901, for obtaining battery current voltage value;
Second transmitting element 902, for representing that the signal of described battery current voltage value is sent to charger.
In concrete enforcement, described second transmitting element 902 is for being sent to charger by a PWM ripple, and the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
The embodiment of the present invention additionally provides a kind of charging equipment, comprise PWM output circuit, described PWM output circuit is suitable for the battery current voltage value obtaining charging equipment, described battery current voltage value is converted to a PWM ripple of duty ratio corresponding, and is sent to charger.
In concrete enforcement, described PWM output circuit comprises: comparator; The saw-toothed wave generator coupled with described comparator.
With reference to Figure 10, give the structural representation of a kind of PWM output circuit in one embodiment of the invention, comprise comparator A2 and saw-toothed wave generator."-" input of saw-toothed wave generator and comparator A2 couples, and after producing sawtooth waveforms, sawtooth waveforms is sent to comparator A2."+" input of comparator A2 inputs voltage value signal V1 corresponding to battery current voltage value, can generate a PWM ripple by comparing A2.
Such as, PWM ripple duty ratio corresponding during magnitude of voltage V1=1.4V is 70%, and PWM ripple duty ratio corresponding during magnitude of voltage V1=1.2V is 60%.Battery current voltage value is V bAT=4V, then the PWM ripple duty ratio that battery current voltage value is corresponding is Duty=(4-3)/(5-3) * 80%+20%=60%.According to the magnitude of voltage V1 preset and the corresponding relation of PWM ripple duty ratio, during V1=1.2V, comparator produces the PWM ripple that duty ratio is 60%, therefore, and the second input input 1.2V of comparator, thus the PWM ripple that duty ratio is 60% can be produced, and be sent to charger.
In other embodiments of the present invention, PWM output circuit also can be that battery current voltage value can be converted to the device of a PWM ripple of duty ratio corresponding by other, does not repeat herein.
The embodiment of the present invention additionally provides another kind of charging method, with reference to Figure 11, is described in detail below by way of concrete steps.
Step S1101, obtains battery current voltage value.
Step S1102, will represent that the signal of described battery current voltage value sends.
In embodiments of the present invention, represent that the signal of battery current voltage value can be the first PWM ripple, the duty ratio of a PWM ripple is corresponding with battery current voltage value.
In embodiments of the present invention, step S1101 ~ step S1102 with reference to step S801 ~ step S802, can repeat no more herein.
The embodiment of the present invention additionally provides a kind of charging device, with reference to Fig. 9, can comprise: second acquisition unit and the second transmitting element, wherein:
Second acquisition unit, for obtaining battery current voltage value;
Second transmitting element, for representing that the signal of described battery current voltage value sends.
In concrete enforcement, described second transmitting element may be used for a PWM ripple to send, and the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
The embodiment of the present invention additionally provides a kind of electronic equipment, comprising: PWM output circuit, and described PWM output circuit is suitable for obtaining battery current voltage value, described battery current voltage value is converted to a PWM ripple of duty ratio corresponding and sends.
In concrete enforcement, described PWM output circuit comprises: comparator; The saw-toothed wave generator coupled with described comparator.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is that the hardware that can carry out instruction relevant by program has come, this program can be stored in a computer-readable recording medium, and storage medium can comprise: ROM, RAM, disk or CD etc.
Although the present invention discloses as above, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.

Claims (40)

1. a charging method, is characterized in that, comprising:
When receiving the signal of the expression battery current voltage value that charging equipment sends, obtain described battery current voltage value;
According to described battery current voltage value, the output voltage of adjustment charger.
2. charging method as claimed in claim 1, is characterized in that, described in when receiving the signal of the expression battery current voltage value that charging equipment sends, obtain described battery current voltage value, comprising:
Receive the PWM ripple that charging equipment sends, the duty ratio of a described PWM ripple is corresponding with described battery current voltage value;
Obtain the duty ratio of a described PWM ripple, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, obtain described battery current voltage value.
3. charging method as claimed in claim 1, it is characterized in that, described according to described battery current voltage value, the output voltage of adjustment charger, comprise: described battery current voltage value is added with the voltage difference preset, and using obtain with value as the output voltage after described charger adjusts.
4. a charging device, is characterized in that, comprising:
First acquiring unit, for when receiving the signal of the expression battery current voltage value that charging equipment sends, obtains described battery current voltage value;
First adjustment unit, for according to described battery current voltage value, adjusts the output voltage of charger.
5. charging device as claimed in claim 4, it is characterized in that, described first acquiring unit is used for:
Receive the PWM ripple that charging equipment sends, the duty ratio of a described PWM ripple is corresponding with described battery current voltage value; Obtain the duty ratio of a described PWM ripple, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, obtain described battery current voltage value.
6. charging device as claimed in claim 4, is characterized in that, described first adjustment unit is used for described battery current voltage value to be added with the voltage difference preset, and using obtain with value as the output voltage after described charger adjusts.
7. a charger, it is characterized in that, comprising: PWM feedback circuit and electric pressure converter, wherein: described PWM feedback circuit, be suitable for the PWM ripple receiving charging equipment transmission, obtain the battery current voltage value of described charging equipment corresponding to a described PWM ripple;
Described electric pressure converter, is suitable for according to described battery current voltage value, the output voltage of adjustment charger.
8. charger as claimed in claim 7, it is characterized in that, described PWM feedback circuit comprises: sample circuit, is suitable for sampling to a described PWM ripple, to obtain the duty ratio of a described PWM ripple.
9. charger as claimed in claim 8, it is characterized in that, described sample circuit comprises adc circuit.
10. charger as claimed in claim 7, it is characterized in that, described PWM feedback circuit comprises: low pass filter; With ADC or the operational amplifier of described low pass filter coupled.
11. chargers as claimed in claim 10, is characterized in that, described low pass filter comprise following any one: low-pass first order filter, second-order low-pass filter.
12. chargers as claimed in claim 7, it is characterized in that, described electric pressure converter is AC-DC converter or dc-dc.
13. chargers as claimed in claim 12, it is characterized in that, when described electric pressure converter is AC-DC converter, between described AC-DC converter and described PWM feedback circuit, be provided with isolator, be suitable for described AC-DC converter and described PWM feedback circuit physical isolation.
14. chargers as claimed in claim 13, it is characterized in that, described isolator is Light Coupled Device.
15. 1 kinds of charging methods, is characterized in that, comprising:
When receiving the signal representing battery current voltage value, obtain described battery current voltage value;
According to described battery current voltage value, the output voltage of adjustment charger.
16. charging methods as claimed in claim 15, it is characterized in that, described when receiving the signal representing battery current voltage value, obtain described battery current voltage value, comprise: receive a PWM ripple, obtain the duty ratio of a described PWM ripple, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, obtain described battery current voltage value.
17. charging methods as claimed in claim 15, it is characterized in that, described according to described battery current voltage value, the output voltage of adjustment charger, comprise: described battery current voltage value is added with the voltage difference preset, and using obtain with value as the output voltage after described charger adjusts.
18. 1 kinds of charging devices, is characterized in that, comprising:
First acquiring unit, for when receiving the signal representing battery current voltage value, obtains described battery current voltage value;
First adjustment unit, for according to described battery current voltage value, adjusts the output voltage of charger.
19. charging devices as claimed in claim 18, it is characterized in that, described first acquiring unit is for receiving a PWM ripple, obtain the duty ratio of a described PWM ripple, according to the magnitude of voltage preset and the corresponding relation of PWM ripple duty ratio, obtain described battery current voltage value, the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
20. charging devices as claimed in claim 18, is characterized in that, described first adjustment unit is used for described battery current voltage value to be added with the voltage difference preset, and using obtain with value as the output voltage after described charger adjusts.
21. 1 kinds of chargers, is characterized in that, comprising: PWM feedback circuit and electric pressure converter, wherein: described PWM feedback circuit, are suitable for reception the one PWM ripple, obtain the battery current voltage value that a described PWM ripple is corresponding;
Described electric pressure converter, is suitable for according to described battery current voltage value, the output voltage of adjustment charger.
22. chargers as claimed in claim 21, it is characterized in that, described PWM feedback circuit comprises: sample circuit, is suitable for sampling to a described PWM ripple, to obtain the duty ratio of a described PWM ripple.
23. chargers as claimed in claim 22, it is characterized in that, described sample circuit comprises adc circuit.
24. chargers as claimed in claim 21, it is characterized in that, described PWM feedback circuit comprises: low pass filter; With ADC or the operational amplifier of described low pass filter coupled.
25. chargers as claimed in claim 24, is characterized in that, described low pass filter comprise following any one: low-pass first order filter, second-order low-pass filter.
26. chargers as claimed in claim 21, it is characterized in that, described electric pressure converter is AC-DC converter or dc-dc.
27. chargers as claimed in claim 26, it is characterized in that, when described electric pressure converter is AC-DC converter, between described AC-DC converter and described PWM feedback circuit, be provided with isolator, be suitable for described AC-DC converter and described PWM feedback circuit physical isolation.
28. chargers as claimed in claim 27, it is characterized in that, described isolator is Light Coupled Device.
The charging method of 29. 1 kinds of charging equipments, is characterized in that, comprising:
Obtain battery current voltage value;
To represent that the signal of described battery current voltage value is sent to charger.
30. charging methods as claimed in claim 29, is characterized in that, the signal of the described battery current voltage value of described expression is a PWM ripple, and the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
31. 1 kinds of devices to be charged, is characterized in that, comprising:
Second acquisition unit, for obtaining battery current voltage value;
Second transmitting element, for representing that the signal of described battery current voltage value is sent to charger.
32. devices to be charged as claimed in claim 31, is characterized in that, described second transmitting element is used for a PWM ripple to be sent to charger, and the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
33. 1 kinds of charging equipments, it is characterized in that, comprising: PWM output circuit, described PWM output circuit is suitable for the battery current voltage value obtaining charging equipment, described battery current voltage value is converted to a PWM ripple of duty ratio corresponding, and be sent to charger.
34. charging equipments as claimed in claim 33, it is characterized in that, described PWM output circuit comprises: comparator; The saw-toothed wave generator coupled with described comparator.
35. 1 kinds of charging methods, is characterized in that, comprising:
Obtain battery current voltage value;
To represent that the signal of described battery current voltage value sends.
36. charging methods as claimed in claim 35, is characterized in that, the signal of the described battery current voltage value of described expression is a PWM ripple, and the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
37. 1 kinds of electronic installations, is characterized in that, comprising:
Second acquisition unit, for obtaining battery current voltage value;
Second transmitting element, for sending the signal of the described battery current voltage value of mark.
38. electronic installations as claimed in claim 37, is characterized in that, described second transmitting element is used for a PWM ripple to send, and the duty ratio of a described PWM ripple is corresponding with described battery current voltage value.
39. 1 kinds of electronic equipments, is characterized in that, comprising: PWM output circuit, and described PWM output circuit is suitable for obtaining battery current voltage value, described battery current voltage value is converted to a PWM ripple of duty ratio corresponding and sends.
40. electronic equipments as claimed in claim 39, it is characterized in that, described PWM output circuit comprises: comparator; The saw-toothed wave generator coupled with described comparator.
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