CN104485724B - The charging method of charging equipment, device, charging equipment and charging system - Google Patents
The charging method of charging equipment, device, charging equipment and charging system Download PDFInfo
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- CN104485724B CN104485724B CN201410854651.7A CN201410854651A CN104485724B CN 104485724 B CN104485724 B CN 104485724B CN 201410854651 A CN201410854651 A CN 201410854651A CN 104485724 B CN104485724 B CN 104485724B
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- 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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Abstract
A kind of charging method of charging equipment, device, charging equipment and charging system, the charging method include：When the signal of expression current nominal output current value of charger transmission is received, the current nominal output current value of the charger is obtained；Current nominal output current value according to the charger, adjusts the preset charged current value of the charging equipment, and is charged with the charging current value after adjustment；The signal for representing battery current voltage value is sent to the charger so that the charger adjusts output voltage according to the battery current voltage value.Using methods described, device, charging equipment and charging system, power attenuation of the charging circuit in charging process can be efficiently reduced.
Description
Technical field
The present invention relates to wireless communication field, more particularly to a kind of charging method of charging equipment, device, to be charged set
Standby and charging system.
Background technology
In existing GB charger, the output voltage of charger is 5V, and output current is then according to the nominal value of charger
It is different and different, between generally 300mA~1800mA.
Existing USB GBs charger generally comprises four ports：VBUS ports, DP ports, DM ports and GND ends
Mouthful, wherein, VBUS ports are the output port of charger, and DP ports and DM ports are two signal ports of USB interface.Logical
When overcharging electrical equipment and treating the mobile terminals such as charging equipment, such as mobile phone and charged, charging equipment is by detecting charger
Whether short circuit judges whether current charger is GB charger for DM and DP ports.It is determined that current charger charges for GB
During device, charger is charged by charging equipment of fixed output voltage.
However, when using the above method to be charged for charging equipment, charger is with fixed output voltage to treat
Charging equipment is charged, and there is a problem of that the loss of charger power output is higher.
The content of the invention
The problem that the embodiment of the present invention is solved is the power attenuation for how reducing charging circuit in charging process.
To solve the above problems, the embodiment of the present invention provides a kind of charging method of charging equipment, including：
When the signal of expression current nominal output current value of charger transmission is received, working as the charger is obtained
Preceding specified output current value；
Current nominal output current value according to the charger, adjusts the preset charged electric current of the charging equipment
Value, and charged with the charging current value after adjustment；
The signal for representing battery current voltage value is sent to the charger so that the charger is worked as according to the battery
Preceding magnitude of voltage, adjusts output voltage.
Optionally, the signal that the charger sends is a PWM ripples, and the dutycycle of a PWM ripples is filled with described
The current nominal output current value correspondence of electrical equipment；
The acquisition charger current nominal output current value, including：The dutycycle of a PWM ripples is obtained,
According to default current value and the corresponding relation of dutycycle, the current nominal output current value of the charger is obtained.
Optionally, the current nominal output current value according to the charger, adjusts the pre- of the charging equipment
If charging current value, including：The preset charged current value of the charging equipment is adjusted to the current nominal of the charger
Output current value.
Optionally, the charging equipment includes following at least one：Mobile terminal, charger baby.
Optionally, it is described that the signal for representing battery current voltage value is sent to the charger so that the charger root
According to the battery current voltage value, output voltage is adjusted, including：
The 2nd PWM ripples, dutycycle and the battery current voltage value pair of the 2nd PWM ripples are sent to the charger
Should so that the charger obtains the charging equipment according to default magnitude of voltage and the corresponding relation of PWM ripple dutycycles
Battery current voltage value, and output voltage is adjusted according to the battery current voltage value.
To solve the above problems, a kind of charging device is the embodiment of the invention provides, including：
Acquiring unit, for when the signal of expression current nominal output current value of charger transmission is received, obtaining
The current nominal output current value of the charger；
Adjustment unit, for the current nominal output current value according to the charger, adjusts the charging equipment
Preset charged current value；
Charhing unit, for being charged using the charging current value after adjustment unit adjustment；
Transmitting element, the signal of battery current voltage value is represented for being sent to the charger so that the charger
According to the battery current voltage value, output voltage is adjusted.
Optionally, the acquiring unit is used for the when the expression current nominal output current value that receive charger transmission
During one PWM ripple signals, the dutycycle of a PWM ripples is obtained, according to default current value and the corresponding relation of dutycycle, obtained
Take the current nominal output current value of the charger.
Optionally, the adjustment unit is used to for the preset charged current value of the charging equipment to be adjusted to described current
Output-current rating value.
Optionally, the transmitting element is used to send the 2nd PWM ripples, the duty of the 2nd PWM ripples to the charger
Than corresponding with the battery current voltage value so that the charger is corresponding with PWM ripple dutycycles according to default magnitude of voltage
Relation, obtains the battery current voltage value, and according to the battery current voltage value, adjusts output voltage.
Optionally, the charging equipment includes following at least one：Mobile terminal, charger baby.
The embodiment of the present invention additionally provides a kind of charging equipment, including：PWM detection circuit, controller, charging circuit,
Battery and pwm control circuit, wherein：
The PWM detects circuit, is suitable to receive the PWM ripples that charger sends, and obtain accounting for for a PWM ripples
Sky ratio；
The controller, is suitable to the dutycycle according to a PWM ripples, obtains described fill corresponding with the dutycycle
The current nominal output current value of electrical equipment, and according to the current nominal output current value of the charger, adjust described to be charged
The preset charged current value of equipment, and send control instruction to the charging circuit；
The charging circuit, is suitable to according to the control instruction, produces electric current corresponding with the charging current value after adjustment
And be input into the battery；
The pwm control circuit, is suitable to obtain battery current voltage value, according to default magnitude of voltage and PWM ripple dutycycles
Corresponding relation, the battery current voltage value is converted into the 2nd PWM ripples of duty ratio corresponding, and send to the charging
Device.
Optionally, the PWM detections circuit includes：Sample circuit, is suitable to sample a PWM ripples, to obtain
Take the dutycycle of a PWM ripples.
Optionally, the sample circuit includes adc circuit.
Optionally, the PWM detections circuit includes：First low pass filter；With first low pass filter coupled
Adc circuit or high frequency clock circuit.
Optionally, first low pass filter include it is following any one：Low-pass first order filter, second-order low-pass filter
Device.
Optionally, the charging equipment also includes：Second low pass filter, is suitable to carry out battery current voltage signal
Low-pass filtering treatment, and battery voltage signal after filtering is sent to the pwm control circuit.
Optionally, the charging equipment also includes：Scaling circuit, be arranged on second low pass filter with it is described
Between pwm control circuit, it is suitable to zoom in or out the battery current voltage value.
The embodiment of the present invention additionally provides a kind of charging system, including：Charger and charging equipment, wherein：
The charging equipment, is suitable to when the signal of the expression current nominal output current value for receiving charger transmission
When, obtain the current nominal output current value of the charger, the current nominal output current value according to the charger, adjustment
The preset charged current value of the charging equipment, and charged with the charging current value after adjustment；And, to the charging
Device sends the signal for representing battery current voltage value so that the charger output is corresponding with the battery current voltage value signal
Voltage；
The charger, is suitable to, when the signal of expression battery current voltage value of charging equipment transmission is received, obtain
The battery current voltage value of the charging equipment is taken, according to the battery current voltage value, the output voltage of charger is adjusted；
And, the signal for representing current nominal output current value is sent to the charging equipment.
The embodiment of the present invention additionally provides the charging method of another charging equipment, including：
When the signal for representing current nominal output current value is received, the current nominal output current value is obtained；
According to the current nominal output current value, the preset charged current value of the charging equipment is adjusted, and to adjust
Charging current value after whole is charged；
Send the signal for representing battery current voltage value.
Optionally, the signal for representing current nominal output current value is a PWM ripples, the dutycycle of the PWM ripples
It is corresponding with the current nominal output current value；The acquisition current nominal output current value, including：Obtain described first
The dutycycle of PWM ripples, according to default current value and the corresponding relation of PWM ripple dutycycles, obtains the current nominal output electricity
Flow valuve.
Optionally, it is described according to the current nominal output current value, adjust the preset charged electricity of the charging equipment
Flow valuve, including：The preset charged current value of the charging equipment is adjusted to the current nominal output current value.
Optionally, the signal for sending expression battery current voltage value, including：Send the 2nd PWM ripples, described second
The dutycycle of PWM ripples is corresponding with the battery current voltage value.
The embodiment of the present invention additionally provides another device to be charged, including：
Acquiring unit, for when the signal for representing current nominal output current value is received, obtaining the current nominal
Output current value；
Adjustment unit, for according to the current nominal output current value, adjusting the preset charged of the charging equipment
Current value；
Charhing unit, for being charged using the charging current value after adjustment unit adjustment；
Transmitting element, the signal of battery current voltage value is represented for sending.
Optionally, the acquiring unit is used for when the PWM ripple signals for receiving expression current nominal output current value
When, the dutycycle of a PWM ripples is obtained, according to default current value and the corresponding relation of PWM ripple dutycycles, obtain described
Current nominal output current value.
Optionally, the adjustment unit is used to for the preset charged current value of the charging equipment to be adjusted to described current
Output-current rating value.
Optionally, the transmitting element is used to send the 2nd PWM ripples, the dutycycle and the battery of the 2nd PWM ripples
Current voltage value correspondence.
The embodiment of the present invention additionally provides another charging equipment, including：PWM detections circuit, controller, charging electricity
Road, battery and pwm control circuit, wherein：
The PWM detects circuit, is suitable to receive a PWM ripples, and obtains the dutycycle of a PWM ripples, described the
The dutycycle of one PWM ripples is corresponding with the current nominal output current value；
The controller, is suitable to the dutycycle according to a PWM ripples, obtains described work as corresponding with the dutycycle
Preceding specified output current value, and according to the current nominal output current value, adjust the preset charged electricity of the charging equipment
Flow valuve, and send control instruction to the charging circuit；
The charging circuit, is suitable to according to the control instruction, produces electric current corresponding with the charging current value after adjustment
And be input into the battery；
The pwm control circuit, is suitable to the corresponding relation according to default magnitude of voltage and PWM ripple dutycycles, is treated described
The battery current voltage value of charging equipment is converted into the 2nd PWM ripples of duty ratio corresponding and sends.
Optionally, the PWM detections circuit includes：Sample circuit, is suitable to sample a PWM ripples, to obtain
Take the dutycycle of a PWM ripples.
Optionally, the sample circuit includes adc circuit.
Optionally, the PWM detections circuit includes：First low pass filter；With first low pass filter coupled
Adc circuit or high frequency clock circuit.
Optionally, first low pass filter include it is following any one：Low-pass first order filter, second-order low-pass filter
Device.
Optionally, the pwm control circuit includes：Comparator；The saw-toothed wave generator coupled with the comparator.
Compared with prior art, the technical scheme of the embodiment of the present invention has advantages below：
Charging equipment is adjusted by obtaining the current nominal output current value of charger to charging current, without
It is only to be charged with fixed preset charged current value, in the corresponding charging current of current nominal output current value of charger
When value is more than the charging current of the fixation of charging equipment, the charging current of charging equipment is adjusted so that the charging after adjustment
Current value can make full use of the output-current rating value of charger more than fixed preset charged current value, so as to realize fast
Speed charges.
The signal for representing battery current voltage is sent to charger by charging equipment, the output voltage to charger enters
Row adjustment so that charger exports voltage higher, such that it is able to reduce on charger internal and power transmission path etc.
The power that effect resistance is consumed, reduces the loss of power, improves charging current, realizes more quickly charging.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the charging equipment charging method in the embodiment of the present invention；
Fig. 2 is the structural representation of the device a kind of to be charged in the embodiment of the present invention；
Fig. 3 is a kind of structural representation of the charging equipment in the embodiment of the present invention；
Fig. 4 is a kind of structural representation of PWM detection circuits in the embodiment of the present invention；
Fig. 5 is a kind of structural representation of the pwm control circuit in the embodiment of the present invention；
Fig. 6 is the flow chart of another charging equipment charging method in the embodiment of the present invention；
Fig. 7 is a kind of structural representation of the charging system in the embodiment of the present invention.
Specific embodiment
In the prior art, when using USB charger to be charged for charging equipment, charging equipment is according to default
Fixation charging current for charging.However, in actual applications, if the output-current rating value at charger end is larger, such as volume
Output current value is determined for 1800mA, and the preset charged current value of charging equipment is the rated output electricity of 600mA, i.e. charger
More than the charging current value of charging equipment acquiescence, at this moment, charging equipment is still charged flow valuve with the charging current value given tacit consent to,
The output-current rating ability of charger cannot be made full use of, charge efficiency is relatively low.
In embodiments of the present invention, charging equipment is by obtaining the current nominal output current value of charger, to charging
Electric current is adjusted, and rather than only being charged with fixed preset charged current value, electricity is exported in the current nominal of charger
When the corresponding charging current value of flow valuve is more than the charging current of the fixation of charging equipment, the charging electricity of charging equipment is adjusted
Stream so that the charging current value after adjustment can make full use of the specified defeated of charger more than fixed preset charged current value
Go out current value, so as to realize quick charge.
It is understandable to enable the above-mentioned purpose of the embodiment of the present invention, feature and advantage to become apparent, it is right below in conjunction with the accompanying drawings
Specific embodiment of the invention is described in detail.
A kind of charging method is the embodiment of the invention provides, reference picture 1 is described in detail below by way of specific steps.
Step S101, when the signal of expression current nominal output current value of charger transmission is received, obtains described
The current nominal output current value of charger.
In specific implementation, charging equipment can be any equipment for including the device that can store electric energy, storage
The device of electric energy can be battery, and charger can be any charger including USB interface.For example, charging equipment can be with
It is the equipment that mobile phone terminal, panel computer etc., or charger baby, portable power source etc. can store electric energy, can also is it
His equipment, as long as comprising the device that can store electric energy, do not repeat herein.
In specific implementation, when to charging equipment output current, the current value of output can be charger to charger
Output-current rating value.Charger can send to charging equipment and represent while to charging equipment output current
The signal of current nominal output current value so that charging equipment upon receipt of the signal, can obtain the current of charger
Output-current rating value.Charger can include the signal of diversified forms to the signal that charging equipment sends, as long as satisfaction is treated
Charging equipment can obtain the current nominal output current value of charger.
In embodiments of the present invention, when charger is in holding state, the DP ports of charger and DM ports short circuit.Fill
Magnitude of voltage on electrical equipment real-time detection DP ports, reaches when the magnitude of voltage on DP ports is detected higher than the duration of preset voltage value
During preset duration, charger disconnects DM ports and DP ports, is sent to charging equipment by DM ports and represents current nominal
The signal of output current value.
In an embodiment of the present invention, the magnitude of voltage on charger real-time detection DP ports.When charging equipment and charging
When device is connected, charging equipment for example sends request signal or enables the mode of signal so that charge to charger sending signal
Voltage on the DP ports of device is raised.When the duration that the voltage on DP ports is increased to Vth reaches preset duration, charger will
The DP ports of short circuit and DP ports disconnect, and send expression current nominal output current value to charging equipment by DM ports
Signal.
Charging equipment can be obtained after the signal of letter of guarantee current nominal output current value of charger transmission is received
The current nominal output current value of charger, to perform step S102.Charger can be wrapped to the signal that charging equipment sends
The signal of diversified forms is included, as long as meeting charging equipment can obtain the current nominal output current value of charger.
In an embodiment of the present invention, the signal of the expression current nominal output current value that charger sends is certain duty
First PWM ripples of ratio.PWM generating means are set in charger, according to default current value pass corresponding with PWM ripple dutycycles
System, the current nominal output current value of charger is converted into a PWM ripples of duty ratio corresponding, and a PWM ripples are sent
To charging equipment.
In an embodiment of the present invention, the PWM ripples generating means for being set in charger include that comparator and sawtooth waveforms are sent out
Raw device.Comparator exports corresponding high level or low level by comparing the magnitude of voltage that two inputs are input into.According to default
Current value and the corresponding relation of PWM ripple dutycycles, obtain the corresponding PWM ripples of current nominal output current value of charger
Dutycycle.Saw-toothed wave generator generates sawtooth waveforms and is input to the first input end of comparator, is input at the second end of comparator
Magnitude of voltage V1, by mutually V1 magnitudes of voltage corresponding with sawtooth waveforms are compared in the same time, exporting high level or low level.Pass through
Adjustment magnitude of voltage V1, you can a PWM ripples of duty ratio corresponding are produced by comparator.
In an embodiment of the present invention, the corresponding relation of magnitude of voltage V1 and PWM ripple dutycycles can be pre-build, for example,
Corresponding PWM ripples dutycycle is 80% during magnitude of voltage V1=1.6V, and corresponding PWM ripples dutycycle is during magnitude of voltage V1=1.2V
60% etc., it is 80% in the dutycycle of the corresponding PWM ripples of output-current rating value for getting current charger thus
When, the magnitude of voltage V1=1.6V of the second input input of comparator, so as to generate the PWM ripples that dutycycle is 80%.
In other embodiments of the present invention, the PWM ripples generating means in charger can also be that other can generate PWM ripples
Device, do not repeat herein.
PWM wave receiving devices can be set at charging equipment end, charger transmission is received in PWM wave receiving devices
After first PWM ripples, the corresponding dutycycle of a PWM ripples is obtained, according to default current value pass corresponding with PWM ripple dutycycles
System, you can obtain the current nominal output current value of charger.
The maximum current bearing capacity for setting generic USB interface is maxoutA, is using maxoutA as PWM ripple dutycycles
100% corresponding current value, charger current nominal output current value is maxA, and maxA ＜ maxoutA, then by current nominal
The dutycycle of the corresponding PWM ripples of output current value is (max A/maxoutA) × 100%.Charging equipment is receiving charging
After the PWM ripples that device sends, the dutycycle of the PWM ripples for receiving can be obtained, according to the default current value in charger end and PWM ripples
The corresponding relation of dutycycle, you can know the current nominal output current value of charger.
For example, the maximum current bearing capacity of generic USB interface is 2.5A, charger current nominal output current value is volume
Current value is determined for 2A, then the dutycycle of the corresponding PWM ripples of current nominal output current value is：2/2.5 × 100%=80%, i.e.,
Charger sends the PWM ripples that dutycycle is 80% to charging equipment.Charging equipment is receiving the PWM ripples of charger transmission
Afterwards, it is 80% to get the dutycycle of PWM ripples, according to default current value and the corresponding relation of PWM ripple dutycycles, you can know
Charger current nominal output current value is 2A.
In other embodiments of the present invention, the output of charger current nominal can also be obtained by other computing modes
PWM ripple dutycycles corresponding to current value, do not repeat herein.
Step S102, the current nominal output current value according to the charger adjusts the default of the charging equipment
Charging current value, and charged with the charging current value after adjustment.
In specific implementation, charging equipment, can be with root after the current nominal output current value for getting charger
The factors such as the circuit design according to charging equipment, calculate charging current value I corresponding with current nominal output current valueCHG。
In embodiments of the present invention, the charging modes for charging equipment are different, in the output current value phase of charger
In the case of, the charging current I of corresponding charging equipmentCHGCan and differ.In actual applications, charging equipment
Charging modes can be linear-charging.When the charging modes of charging equipment are linear-charging, ICHGWith the output of charger
Current value is equal.
In the corresponding charging current value I of output-current rating value for getting chargerCHGAfterwards, can be by ICHGWith wait to fill
The preset charged current value I of electric equipment0It is compared.Work as ICHG＞ I0When, the preset charged electric current of charging equipment can be adjusted
Whole is ICHGOr it is slightly less than ICHG, and with ICHGOr it is slightly less than ICHGCurrent value charged, so as to realize quick charge.Work as ICHG
≤I0When, can be with ICHGOr it is slightly less than ICHGCurrent value charged, so as to protect charger, and in the case of as far as possible
Quick charge.
As can be seen here, charging equipment is carried out by obtaining the current nominal output current value of charger to charging current
Adjustment, rather than only being charged with fixed preset charged current value, in the current nominal output current value correspondence of charger
Charging current value more than charging equipment fixation charging current when, adjust charging equipment charging current so that adjust
Charging current value after whole can make full use of the output-current rating of charger more than fixed preset charged current value, from
And realize quick charge.
Step S103, to the charger send represent battery current voltage value signal so that the charger according to
The battery current voltage value, adjusts output voltage.
In embodiments of the present invention, in charging process, the magnitude of voltage of battery can change with charging duration.
Charging equipment can in real time obtain the current voltage value of battery, and the letter for representing battery current voltage value is sent to charger
Number.Charger can obtain battery current after the signal of expression battery current voltage value for receiving charging equipment transmission
Magnitude of voltage.
In an embodiment of the present invention, the signal of the expression battery current voltage value that charging equipment sends is certain duty
2nd PWM ripples of ratio.PWM ripple generating means are set in charging equipment, according to default magnitude of voltage and PWM ripple dutycycles
Corresponding relation, battery current voltage value is converted into the 2nd PWM ripples of duty ratio corresponding by PWM ripples generating means, and by
Two PWM ripples are sent to charger.In other embodiments of the present invention, the expression battery current voltage value that charging equipment sends
Signal can also be the signal of other forms, not repeat herein.
In an embodiment of the present invention, the PWM generating means for being set in charging equipment include comparator.Comparator passes through
Compare two magnitudes of voltage of input input, export corresponding high level or low level.Accounted for PWM ripples according to default magnitude of voltage
The corresponding relation of empty ratio, obtains the dutycycle of the corresponding 2nd PWM ripples of battery current voltage value.The first input end of comparator is defeated
Enter sawtooth waveforms, the second input is input into a corresponding magnitude of voltage V2, by mutually in the same time V2 in the corresponding voltage of sawtooth waveforms
Value is compared, and exports high level or low level.By adjusting magnitude of voltage V2, you can produce duty ratio corresponding by comparator
2nd PWM ripples.
In an embodiment of the present invention, the corresponding relation of magnitude of voltage V2 and PWM ripple dutycycles can be pre-build, for example,
Corresponding PWM ripples dutycycle is 70% during magnitude of voltage V2=1.4V, and corresponding PWM ripples dutycycle is during magnitude of voltage V2=1.2V
60% etc., thus, when the dutycycle of the corresponding 2nd PWM ripples of charging equipment battery current voltage value is got, comparator
The second input be input into default magnitude of voltage V2=1.4V, so as to generate the 2nd PWM ripples that dutycycle is 70%.
For example, for mobile terminals such as mobile phones, the voltage of the lithium battery for using or other kinds of battery is general not
5V, generally 4.2V or 4.35V can be exceeded.In normal work, the minimum voltage of battery is typically not less than 3V.Setting 5V pairs
The PWM ripples dutycycle answered is that the corresponding PWM ripples dutycycles of 100%, 3V are 20%, then battery current voltage value VBATCorresponding PWM
Ripple dutycycle is Duty=(VBAT- 3)/(5-3) * 80%+20%.
Battery current voltage value is VBAT=4V, then the corresponding PWM ripples dutycycle of battery current voltage value is Duty=(4-
3)/(5-3) * 80%+20%=60%.It can be seen from corresponding relation according to default magnitude of voltage V1 and PWM ripple dutycycles, V1=
Comparator produces the PWM ripples that dutycycle is 60% during 1.2V, therefore, the second input input 1.2V of comparator, such that it is able to
The 2nd PWM ripples that dutycycle is 60% are produced, and is sent to charger.
Charger can receive the 2nd PWM ripples that charging equipment sends by PWM wave receiving devices, and get second
The dutycycle of PWM ripples is 60%.According to default magnitude of voltage and the corresponding relation of PWM ripple dutycycles, charger can be known to be treated
The battery current voltage value of charging equipment is 4V.
It is understood that battery current voltage value is not limited in the present invention with the corresponding relation of PWM ripple dutycycles
The corresponding relation provided in embodiment is provided, can also there is the corresponding relation of other forms, do not repeat herein.
Below to charger according to battery current voltage value, the operating procedure for adjusting output voltage is described.
Charger after battery current voltage value is got, the current voltage value of the battery that will can be got with it is default
Voltage difference carries out sum operation, and obtain and value is used as the charger output voltage after adjustment, i.e. charger after adjustment
Output voltage is the current voltage value and default voltage difference sum of battery.
In embodiments of the present invention, default voltage difference can in advance be measured and obtained, its implication can with when：Can
Difference when meeting charger output rated current between the output voltage values VBUS and battery voltage value VBAT of charger.In reality
In the application of border, default voltage difference can be between 0.4V~0.6V, or other values.In one embodiment of the invention
In, default voltage difference is 0.5V.
For example, charger knows that the battery current voltage value of charging equipment is 4V, default voltage difference is 0.5V, then
The output voltage values of the charger after adjustment are exported for 4.5V, i.e. charger with the voltage of 4.5V.
So that charging equipment uses linear-charging mode as an example, in the prior art, set the output voltage values of charger as
5V, output current value is 1A, i.e., the power output of charger is 5W.The battery current voltage value of charging equipment is 3.2V, line
In property charging modes, the input current of charging equipment electric current can be equal with the output current of charger, i.e. charging equipment
Battery input current be 1A, then the current input power of battery be 3.2W.The power output of charger is current with battery
Difference between input power is 5W-3.2W=1.8W, that is, the energy for having 1.8W is wasted.
And the method in the embodiment of the present invention is used, battery current voltage value is 3.2V, and charging equipment is sent out to charger
Send the signal for representing battery current voltage value so that charger knows battery current voltage value for 3.2V, by battery current voltage
Value is added with default voltage difference, and default voltage difference is 0.5V, then the charger output voltage after being adjusted is
3.7V, the output current of charger keeps constant, is still 1A, then the power output of charger is 3.7W, the current input of battery
Power is 3.2W, and the difference between the output power value of charger and the current input power of battery is 3.7W-3.2W=0.5W,
The energy for only having 0.5W is wasted.Energy compared to 1.8W of the prior art is wasted, and the embodiment of the present invention subtracts significantly
Power attenuation of the charging circuit in charging process is lacked.
As can be seen here, charger is obtained by receiving the signal for representing battery current voltage value that charging equipment sends
The current voltage value of battery, is adjusted according to battery current voltage value to output voltage, is carried out rather than with fixed voltage
Output.In charging process, the output voltage of charger changes and changes with cell voltage, constant in the output current of charger
In the case of, the output voltage of charger is reduced, the difference between the output voltage of charger and the magnitude of voltage of battery can be caused
Value is reduced, such that it is able to reduce the power attenuation in charging circuit in charging process.
Reference picture 2, the embodiment of the present invention additionally provides a kind of device to be charged 20, including：Acquiring unit 201, adjustment are single
Unit 202, charhing unit 203 and transmitting element 204, wherein：
Acquiring unit 201, for when the signal of expression current nominal output current value of charger transmission is received, obtaining
Take the current nominal output current value of the charger；
Adjustment unit 202, for the current nominal output current value according to the charger, adjusts the charging equipment
Preset charged current value；
Charhing unit 203, for being charged using the charging current value after adjustment unit adjustment；
Transmitting element 204, the signal of battery current voltage value is represented for being sent to the charger so that the charging
Device exports voltage corresponding with the battery current voltage value.
In specific implementation, the acquiring unit 201 can be used for when the expression current nominal for receiving charger transmission
During the first PWM ripple signals of output current value, the dutycycle of a PWM ripples is obtained, according to default current value and PWM ripples
The corresponding relation of dutycycle, obtains the current nominal output current value of the charger.
In specific implementation, the adjustment unit 202 can be used for：
The current output voltage value of current nominal output current value and the charger according to the charger, calculates
The current output power value of the charger；
The power supply conversion efficiency of the power-switching circuit in the charging equipment, calculating is input to described to be charged
Effective input power of equipment；
Power-switching circuit in effective input power and the charging equipment of the charging equipment
Magnitude of voltage, calculates the corresponding charging current value of the current nominal output current value, and the preset charged current value is adjusted
It is the corresponding charging current value.
In specific implementation, the adjustment unit 202 can be used for the preset charged current value of the charging equipment
It is adjusted to the current nominal output current value.
In specific implementation, the transmitting element 204 can be used for sending the 2nd PWM ripples, described the to the charger
The dutycycle of two PWM ripples is corresponding with the battery current voltage value so that the charger is according to default magnitude of voltage and PWM ripples
The corresponding relation of dutycycle, obtains the battery current voltage value, and according to the battery current voltage value, adjustment output electricity
Pressure.
In specific implementation, the charging equipment includes following at least one：Mobile terminal, charger baby.
Reference picture 3, the embodiment of the present invention additionally provides a kind of charging equipment 30, including：PWM detections circuit 301, control
Device 302, charging circuit 303, battery 304 and pwm control circuit 305, wherein：
PWM detects circuit 301, is suitable to receive the PWM ripples that charger sends, and obtain accounting for for a PWM ripples
Sky ratio.
In embodiments of the present invention, in charging process, charger can be according to default current value and PWM ripple dutycycles
Corresponding relation, current nominal output current value is converted into a PWM ripples of duty ratio corresponding, and send to charging equipment
30。
For example, charger current nominal output current value is 2A, it is corresponding with PWM ripple dutycycles according to default current value
Relation understands that the corresponding PWM ripples dutycycles of 2A are 80%, then it is 80% that charger can send dutycycle to charging equipment 30
A PWM ripples.
Charging equipment 30 detects circuit 301 to detect the dutycycle of a PWM ripples by PWM, and sends to controller
302。
In embodiments of the present invention, PWM detections circuit 301 can include sample circuit, by sample circuit to a PWM
Ripple is sampled, such that it is able to obtain the dutycycle of a PWM ripples.In an embodiment of the present invention, sample circuit includes ADC electricity
Road, adc circuit is after a PWM ripples are received, you can obtain the corresponding dutycycle of a PWM ripples for receiving.
In an alternative embodiment of the invention, sample circuit includes high frequency clock circuit, and high frequency arteries and veins is produced by high frequency clock
Punching, high level and low level to a PWM ripples carry out pulse technique.According to the corresponding umber of pulse of high level and low level pair
The umber of pulse answered, you can know the dutycycle of a PWM ripples.Sample circuit can also be other circuits, as long as satisfaction can be obtained
The dutycycle of a PWM ripples is taken, is not repeated herein.
In embodiments of the present invention, PWM detections circuit 301 can also include the first low pass filter and adc circuit, lead to
Cross a PWM ripple of first low pass filter to receiving and be filtered treatment, a PWM ripples are converted into corresponding voltage value
Direct current signal, the corresponding magnitude of voltage of direct current signal is obtained by adc circuit, and the magnitude of voltage that will be got is sent to controller
302。
Reference picture 4, gives the structural representation that a kind of PWM in the embodiment of the present invention detects circuit, including：First is low
Bandpass filter and adc circuit, the first low pass filter are made up of resistance R1 and electric capacity C1.Below by citing to of the invention real
The workflow for applying the detection circuits of the PWM in example is illustrated.
The current nominal output current value of charger is 2A, and the dutycycle of a corresponding PWM ripples is 80%.First PWM
The high level of ripple is 3V, and low level is 0V, and a PWM ripples are by after the filtering of the first low pass filter, being converted into magnitude of voltage for 3V
The direct current signal of × 80%=2.4V, the magnitude of voltage that adc circuit collects the direct current signal of current input is 2.4V, you can known
The dutycycle of the first PWM ripples is 80%.
In embodiments of the present invention, the first low pass filter can be low-pass first order filter, or step low-pass
Wave filter or other kinds of low pass filter.For example, in an embodiment of the present invention, using low-pass first order filter as
One low pass filter, the PWM ripples to receiving are filtered treatment.And in an alternative embodiment of the invention, then using two
Rank low pass filter is used as the first low pass filter.
Controller 302, is suitable to the dutycycle according to a PWM ripples, obtains described fill corresponding with the dutycycle
The current nominal output current value of electrical equipment, and according to the current nominal output current value of the charger, adjust described to be charged
The preset charged current value of equipment, and send control instruction to the charging circuit 303.
In embodiments of the present invention, controller 302 is receiving the dutycycle of the PWM ripples that PWM detection circuits send
Afterwards, according to default current value and the corresponding relation of PWM ripple dutycycles, you can obtain the corresponding current value of a PWM ripples, that is, fill
The current nominal output current value of electrical equipment.
Controller 302 can be preset after the current nominal output current value for getting charger to charging equipment
Charging current is adjusted, and after the preset charged electric current to charging equipment is adjusted, is sent to charging circuit 303 and controlled
Instruction.
In embodiments of the present invention, corresponding to the charging equipment using linear-charging mode, controller is filled getting
After the current nominal output current value of electrical equipment, can be by the preset charged electric current I of charging equipment0It is adjusted to the current of charger
Output-current rating value IVBUS, that is, the charging current value after adjusting is IVBUS。
Charging circuit 303, is suitable to according to the control instruction, produces electric current corresponding with the charging current value after adjustment simultaneously
It is input into the battery 304.
In embodiments of the present invention, receive controller 302 transmission control instruction after, charging circuit 303 produce with
The corresponding electric current of charging current value after adjustment, and be input in battery 304, charged so as to be embodied as battery.
For example, the charging current after adjustment is 1.6A, then charging circuit 303 produces the electric current of 1.6A, and is input into battery,
Charged so as to be embodied as battery, i.e., the charging current of battery is 1.6A.
It is understood that in embodiments of the present invention, it is also possible to directly detect that circuit 301 obtains a PWM by PWM
The dutycycle of ripple, to obtain the current nominal output current value of charger.Charged using linear mode in charging equipment
When, PWM detection circuits 301 directly can be sent to charging circuit the current nominal output current value of charger, to control to fill
Circuit 303 exports the electric current equal with charger current nominal output current value, is that battery 304 is charged.
In an embodiment of the present invention, charger sends a PWM ripples by the DP ports of charger to charging equipment,
PWM detection circuits are connected with the DP ports of charging equipment charging inlet, receive the PWM ripples that charger sends.
Pwm control circuit 305, is suitable to obtain battery current voltage value, according to default magnitude of voltage and PWM ripple dutycycles
Corresponding relation, the battery current voltage value is converted into the 2nd PWM ripples of duty ratio corresponding, and send to the charger.
In specific implementation, pwm control circuit 305 can include comparator and saw-toothed wave generator, and comparator passes through
Compare two magnitudes of voltage of input input, export corresponding high level or low level.Accounted for PWM ripples according to default magnitude of voltage
The corresponding relation of empty ratio, obtains the dutycycle of the corresponding 2nd PWM ripples of battery current voltage value.The first input end of comparator is defeated
Enter sawtooth waveforms, the second input is input into a corresponding magnitude of voltage V2, by mutually magnitude of voltage V2 is corresponding with sawtooth waveforms in the same time
Magnitude of voltage be compared, export high level or low level.By adjusting magnitude of voltage V2, you can produce correspondence to account for by comparator
2nd PWM ripples of empty ratio.
Reference picture 5, gives a kind of structural representation of the pwm control circuit 305 in the embodiment of the present invention, including compares
Device A2 and saw-toothed wave generator.Saw-toothed wave generator is coupled with the "-" input of comparator A2, after producing sawtooth waveforms, will be sawed
Tooth ripple is sent to comparator A2.The corresponding voltage value signal of "+" input input load current value of comparator A2, by comparing
Device A2 can the 2nd PWM ripples of generation.
In an embodiment of the present invention, the corresponding relation of magnitude of voltage V2 and PWM ripple dutycycles can be pre-build, for example,
Corresponding PWM ripples dutycycle is 60% during magnitude of voltage V2=1.2V, and corresponding PWM ripples dutycycle is during magnitude of voltage V2=1.4V
70% etc., thus, when it is 60% to get the dutycycle of the corresponding 2nd PWM ripples of battery current voltage value, the of comparator
The magnitude of voltage V2=1.2V of two inputs input, so as to generate the 2nd PWM ripples that dutycycle is 60%, and the 2nd PWM ripples is sent out
Deliver to charger.
For example, battery current voltage value is VBAT=4V, then the corresponding PWM ripples dutycycle of battery current voltage value is Duty
=(VBAT- 3)/(5-3) * 80%+20%.It can be seen from corresponding relation according to default magnitude of voltage V1 and PWM ripple dutycycles, V2=
Comparator produces the PWM ripples that dutycycle is 60% during 1.2V, therefore, the second input input V2=1.2V of comparator, so that
The 2nd PWM ripples that dutycycle is 60% can be produced, and is sent to charger.
In an embodiment of the present invention, PWM detections circuit 301 is arranged in charging equipment, is charged with charging equipment
The DM ports connection of interface, receives the PWM ripples that charger is exported by the DM ports of charger.Pwm control circuit 305 sets
Put in charging equipment, be connected with the DP ports of charging equipment charging inlet, sent to charger by DP ports and represented
The signal of battery current voltage value, i.e., send the 2nd PWM ripples by DP ports to charger.
In embodiments of the present invention, charger and charging equipment are connected by USB connecting lines, with realize power transmission and
Information transfer, and there is certain resistance in USB connecting lines.Therefore, in the above embodiment of the present invention, default voltage difference is solid
Possibly cannot meet actual application demand during definite value.Additionally, also exist the pressure drop of the linear-charging pipe in charging equipment compared with
It is small, even if the reduction of default voltage difference can also be met the demand of actual application.
Therefore, to solve the above problems, the embodiment of the present invention increased scaling electricity on the basis of above-mentioned charging equipment
Road 306, the battery current voltage value got to charging equipment is zoomed in or out, so that charger can be exported
Corresponding magnitude of voltage.
For example, battery current voltage value be 4V, from the above embodiment of the present invention knowable to, the corresponding 2nd PWM ripples of 4V
Dutycycle is 60%.It is 60% that charger gets the dutycycle of the 2nd PWM ripples, such that it is able to know that battery current voltage value is
4V, default voltage difference is 0.5V in charger, then the output voltage of charger should be 4.5V.
However, due to the influence that there is connection line resistance, the voltage difference between charger and battery is actually 0.6V,
I.e. charger should export the voltage of 4.6V.But, the voltage difference set in charger is 0.5V, therefore the output of charger is electric
It is 4.5V to press, so as to the fan-out capability of charger cannot be made full use of.
Battery current voltage value is amplified to 4.1V by scaling circuit 306, then the electricity that pwm control circuit 305 is received
Pond current voltage value is 4.1V, and generation dutycycle is 64% the 2nd PWM ripples and sends to charger.Charger gets second
The dutycycle of PWM ripples is 64%, is added with default voltage difference, and the output voltage values for obtaining should be 4.1V+0.5V=4.6V,
As can be seen here, it is possible to achieve make full use of the fan-out capability of charger.
And for example, battery current voltage value be 4V, from the above embodiment of the present invention knowable to, the corresponding 2nd PWM ripples of 4V
Dutycycle is 60%.It is 60% that charger gets the dutycycle of the 2nd PWM ripples, such that it is able to know that battery current voltage value is
4V, default voltage difference is 0.5V in charger, then the output voltage of charger should be 4.5V.
However, because the pressure drop of the linear-charging pipe in charging equipment is smaller, the voltage difference between charger and battery
Value is actually 0.4V, i.e. charger and should export the voltage of 4.4V.But, the voltage difference set in charger is 0.5V, because
The output voltage of this charger is 4.5V, so as to cause the waste of energy.
Battery current voltage value is contracted to 3.9V by scaling circuit 306, then the electricity that pwm control circuit 305 is received
Pond current voltage value is 3.9V, and generation dutycycle is 56% the 2nd PWM ripples and sends to charger.Charger gets second
The dutycycle of PWM ripples is 56%, is added with default voltage difference, and the output voltage values for obtaining should be 3.9V+0.5V=4.4V,
As can be seen here, using the above method it is possible to prevente effectively from the waste of energy.
In embodiments of the present invention, between scaling circuit and the battery of charging equipment, the second low pass can also be set
Wave filter 307, low-pass filtering treatment is carried out to the battery current voltage signal that scaling circuit gets so that scaling circuit is obtained
The current voltage of the battery for arriving is steady.
The embodiment of the present invention additionally provides the charging method of another charging equipment, reference picture 6, below by way of specific step
Suddenly it is described in detail.
Step S601, when the signal for representing current nominal output current value is received, obtains the current nominal output
Current value.
In specific implementation, the signal for representing current nominal output current value can be the first PWM ripples, a PWM ripples
Dutycycle is corresponding with current nominal output current value.The dutycycle of a PWM ripples can be obtained, according to default current value with
The corresponding relation of PWM ripple dutycycles, you can obtain current nominal output current value.
In the present invention is implemented, the detailed process for obtaining current nominal output current value is referred to above-mentioned implementation of the invention
Step S101 in example, does not repeat herein.
Step S602, according to the current nominal output current value, adjusts the preset charged electric current of the charging equipment
Value, and charged with the charging current value after adjustment.
In specific implementation, when the charging modes of charging equipment are linear-charging, can be by the charging equipment
Preset charged current value be adjusted to the current nominal output current value.
In embodiments of the present invention, the detailed process of the charging current value of adjustment charging equipment is referred to step
S102, does not repeat herein.
Step S603, sends the signal for representing battery current voltage value.
In specific implementation, the signal for representing battery current voltage value can be the second PWM ripples, the duty of the 2nd PWM ripples
Than corresponding with battery current voltage value.Battery current voltage value is converted into the idiographic flow of the 2nd PWM ripples of duty ratio corresponding
The step S103 in the above embodiment of the present invention is referred to, is not repeated herein.
A kind of device to be charged is the embodiment of the invention provides, Fig. 2 is referred to, including：
Acquiring unit, for when the signal for representing current nominal output current value is received, obtaining the current nominal
Output current value；
Adjustment unit, for according to the current nominal output current value, adjusting the preset charged of the charging equipment
Current value；
Charhing unit, for being charged using the charging current value after adjustment unit adjustment；
Transmitting element, the signal of battery current voltage value is represented for sending.
In specific implementation, the acquiring unit can be used for that the first of expression current nominal output current value ought be received
During PWM ripple signals, the dutycycle of a PWM ripples is obtained, according to default current value pass corresponding with PWM ripple dutycycles
System, obtains the current nominal output current value.
In specific implementation, the adjustment unit can be used for：According to the current nominal output current value and described
Current output voltage value, calculates current output power value；
The power supply conversion efficiency of the power-switching circuit in the charging equipment, calculating is input to described to be charged
Effective input power of equipment；
Power-switching circuit in effective input power and the charging equipment of the charging equipment
Magnitude of voltage, calculates the corresponding charging current value of the current nominal output current value, and the preset charged current value is adjusted
It is the corresponding charging current value.
In specific implementation, the adjustment unit can be used for adjusting the preset charged current value of the charging equipment
It is the current nominal output current value.
In specific implementation, the transmitting element can be used for sending the 2nd PWM ripples, the dutycycle of the 2nd PWM ripples
It is corresponding with the battery current voltage value.
The embodiment of the present invention additionally provides a kind of charging equipment, is referred to Fig. 3, including：PWM detections circuit, control
Device, charging circuit, battery and pwm control circuit, wherein：
The PWM detects circuit, is suitable to receive a PWM ripples, and obtains the dutycycle of a PWM ripples, described the
The dutycycle of one PWM ripples is corresponding with the current nominal output current value；
The controller, is suitable to the dutycycle according to a PWM ripples, obtains described work as corresponding with the dutycycle
Preceding specified output current value, and according to the current nominal output current value, adjust the preset charged electricity of the charging equipment
Flow valuve, and send control instruction to the charging circuit；
The charging circuit, is suitable to according to the control instruction, produces electric current corresponding with the charging current value after adjustment
And be input into the battery；
The pwm control circuit, is suitable to the corresponding relation according to default magnitude of voltage and PWM ripple dutycycles, is treated described
The battery current voltage value of charging equipment is converted into the 2nd PWM ripples of duty ratio corresponding and sends.
In specific implementation, the PWM detections circuit can include：Sample circuit, is suitable to carry out a PWM ripples
Sampling, to obtain the dutycycle of a PWM ripples.
In specific implementation, the PWM detections circuit includes：First low pass filter；With first low pass filter
The adc circuit or high frequency clock circuit of coupling.
In specific implementation, the sample circuit includes adc circuit.
In specific implementation, the pwm control circuit includes：Comparator；Occur with the sawtooth waveforms that the comparator is coupled
Device.
Reference picture 7, the embodiment of the present invention additionally provides a kind of charging system 70, including charger 701 and charging equipment
702, wherein：
The charger 701, is suitable to when the signal of expression battery current voltage value of charging equipment transmission is received,
The battery current voltage value of the charging equipment is obtained, according to the battery current voltage value, the output electricity of charger is adjusted
Pressure；And, the signal for representing current nominal output current value is sent to the charging equipment；
The charging equipment 702, is suitable to when the letter of the expression current nominal output current value for receiving charger transmission
Number when, obtain the current nominal output current value of the charger, the current nominal output current value according to the charger is adjusted
The preset charged current value of the whole charging equipment, and charged with the charging current value after adjustment；And, filled to described
Electrical equipment sends the signal for representing battery current voltage value so that the charger output and the battery current voltage value signal pair
The voltage answered.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
Completed with instructing the hardware of correlation by program, the program can be stored in a computer-readable recording medium, storage
Medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art, are not departing from this
In the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
The scope of restriction is defined.
Claims (28)
1. a kind of charging method of charging equipment, it is characterised in that including：
When the signal of expression current nominal output current value of charger transmission is received, obtain the charger works as forehead
Determine output current value；Wherein, the signal for representing current nominal output current value sends in the following way：The charger
When voltage on DP ports are detected reaches preset duration higher than the duration of preset voltage value, by the DM ends of holding state short circuit
Mouth disconnects with the DP ports, and is sent by the DM ports；
Current nominal output current value according to the charger, adjusts the preset charged current value of the charging equipment, and
Charged with the charging current value after adjustment, the current nominal that the charging current value after the adjustment is equal to the charger is defeated
Go out current value；
The signal for representing battery current voltage value is sent to the charger so that the charger is currently electric according to the battery
Pressure value, adjusts output voltage.
2. the charging method of charging equipment as claimed in claim 1, it is characterised in that
The signal that the charger sends is a PWM ripples, and the dutycycle of a PWM ripples works as forehead with the charger
Determine output current value correspondence；
The acquisition charger current nominal output current value, including：The dutycycle of a PWM ripples is obtained, according to
Default current value and the corresponding relation of dutycycle, obtain the current nominal output current value of the charger.
3. the charging method of charging equipment as claimed in claim 1, it is characterised in that the charging equipment includes following
It is at least one：Mobile terminal, charger baby.
4. the charging method of charging equipment as claimed in claim 1, it is characterised in that described to send table to the charger
Show the signal of battery current voltage value so that the charger adjusts output voltage, bag according to the battery current voltage value
Include：
The 2nd PWM ripples are sent to the charger, the dutycycle of the 2nd PWM ripples is corresponding with the battery current voltage value,
So that the charger obtains the electricity of the charging equipment according to default magnitude of voltage and the corresponding relation of PWM ripple dutycycles
Pond current voltage value, and output voltage is adjusted according to the battery current voltage value.
5. a kind of charging device of charging equipment, it is characterised in that including：
Acquiring unit, for when the signal of expression current nominal output current value of charger transmission is received, obtaining described
The current nominal output current value of charger, wherein, the signal for representing current nominal output current value is in the following way
Send：When voltage of the charger on DP ports are detected reaches preset duration higher than the duration of preset voltage value, will treat
The DM ports of machine state short circuit disconnect with the DP ports, and are sent by the DM ports；
Adjustment unit, for the current nominal output current value according to the charger, adjusts the default of the charging equipment
Charging current value, the charging current value after the adjustment is equal to the current nominal output current value of the charger；
Charhing unit, for being charged using the charging current value after adjustment unit adjustment；
Transmitting element, for the charger send represent battery current voltage value signal so that the charger according to
The battery current voltage value, adjusts output voltage.
6. the charging device of charging equipment as claimed in claim 5, it is characterised in that the acquiring unit is used for when receiving
During the first PWM ripple signals of the expression current nominal output current value sent to charger, the duty of a PWM ripples is obtained
Than according to default current value and the corresponding relation of dutycycle, obtaining the current nominal output current value of the charger.
7. the charging device of charging equipment as claimed in claim 5, it is characterised in that the transmitting element is used for described
Charger sends the 2nd PWM ripples, and the dutycycle of the 2nd PWM ripples is corresponding with the battery current voltage value so that described to fill
Electrical equipment obtains the battery current voltage value according to default magnitude of voltage and the corresponding relation of PWM ripple dutycycles, and according to described
Battery current voltage value, adjusts output voltage.
8. the charging device of charging equipment as claimed in claim 5, it is characterised in that the charging equipment includes following
It is at least one：Mobile terminal, charger baby.
9. a kind of charging equipment, it is characterised in that including：PWM detections circuit, controller, charging circuit, battery and PWM
Control circuit, wherein：
The PWM detects circuit, is suitable to receive the PWM ripples that charger sends, and obtain the duty of a PWM ripples
Than；
The controller, is suitable to the dutycycle according to a PWM ripples, obtains the charger corresponding with the dutycycle
Current nominal output current value, and according to the current nominal output current value of the charger, adjust the charging equipment
Preset charged current value, and to the charging circuit send control instruction；
The charging circuit, is suitable to according to the control instruction, and generation electric current corresponding with the charging current value after adjustment is simultaneously defeated
Enter to the battery；
The pwm control circuit, is suitable to obtain battery current voltage value, right with PWM ripple dutycycles according to default magnitude of voltage
Should be related to, the battery current voltage value is converted into the 2nd PWM ripples of duty ratio corresponding, and send to the charger.
10. charging equipment as claimed in claim 9, it is characterised in that the PWM detections circuit includes：Sample circuit, fits
Sampled in a PWM ripples, to obtain the dutycycle of a PWM ripples.
11. charging equipments as claimed in claim 10, it is characterised in that the sample circuit includes adc circuit.
12. charging equipments as claimed in claim 9, it is characterised in that the PWM detections circuit includes：First low pass filtered
Ripple device；With the adc circuit or high frequency clock circuit of first low pass filter coupled.
13. charging equipments as claimed in claim 12, it is characterised in that first low pass filter includes following any
It is a kind of：Low-pass first order filter, second-order low-pass filter.
14. charging equipments as claimed in claim 9, it is characterised in that also include：Second low pass filter, is suitable to electricity
Pond current voltage signal carries out low-pass filtering treatment, and battery voltage signal after filtering is sent to PWM control electricity
Road.
15. charging equipments as claimed in claim 14, it is characterised in that also include：Scaling circuit, is arranged on described second
Between low pass filter and the pwm control circuit, it is suitable to zoom in or out the battery current voltage value.
A kind of 16. charging methods of charging equipment, it is characterised in that including：
When the signal for representing current nominal output current value is received, the current nominal output current value is obtained, wherein, institute
State and represent that the signal of current nominal output current value sends in the following way：Voltage of the charger on DP ports are detected is high
When the duration of preset voltage value reaches preset duration, the DM ports of holding state short circuit are disconnected with the DP ports, and lead to
The DM ports are crossed to send；
According to the current nominal output current value, adjust the preset charged current value of the charging equipment, and with adjustment after
Charging current value charged, the charging current value after the adjustment be equal to the charger current nominal output current
Value；
Send the signal for representing battery current voltage value.
The charging method of 17. charging equipments as claimed in claim 16, it is characterised in that the expression current nominal output
The signal of current value is a PWM ripples, and the dutycycle of the PWM ripples is corresponding with the current nominal output current value；
The acquisition current nominal output current value, including：The dutycycle of a PWM ripples is obtained, according to default
Current value and the corresponding relation of PWM ripple dutycycles, obtain the current nominal output current value.
The charging method of 18. charging equipments as claimed in claim 16, it is characterised in that the transmission represents that battery is current
The signal of magnitude of voltage, including：Send the 2nd PWM ripples, dutycycle and the battery current voltage value pair of the 2nd PWM ripples
Should.
A kind of 19. charging devices of charging equipment, it is characterised in that including：Acquiring unit, for current when expression is received
During the signal of output-current rating value, the current nominal output current value is obtained；Wherein, the expression current nominal output electricity
The signal of flow valuve sends in the following way：Voltage of the charger on DP ports are detected higher than preset voltage value when be up to
During to preset duration, the DM ports of holding state short circuit are disconnected with the DP ports, and sent by the DM ports；
Adjustment unit, for according to the current nominal output current value, adjusting the preset charged electric current of the charging equipment
Value；
Charhing unit, for being charged using the charging current value after adjustment unit adjustment, the charging after the adjustment
Current value is equal to the current nominal output current value of the charger；
Transmitting element, the signal of battery current voltage value is represented for sending.
The charging device of 20. charging equipments as claimed in claim 19, it is characterised in that the acquiring unit connects for working as
When receiving the PWM ripple signals for representing current nominal output current value, the dutycycle of a PWM ripples is obtained, according to pre-
If current value and PWM ripple dutycycles corresponding relation, obtain the current nominal output current value.
The charging device of 21. charging equipments as claimed in claim 19, it is characterised in that the transmitting element is used to send
2nd PWM ripples, the dutycycle of the 2nd PWM ripples is corresponding with the battery current voltage value.
A kind of 22. charging equipments, it is characterised in that including：PWM detections circuit, controller, charging circuit, battery and PWM
Control circuit, wherein：
The PWM detects circuit, is suitable to receive a PWM ripples, and obtains the dutycycle of a PWM ripples, a PWM
The dutycycle of ripple is corresponding with current nominal output current value；
The controller, is suitable to the dutycycle according to a PWM ripples, obtains and corresponding with the dutycycle described works as forehead
Determine output current value, and according to the current nominal output current value, adjust the preset charged current value of the charging equipment,
And send control instruction to the charging circuit；
The charging circuit, is suitable to according to the control instruction, and generation electric current corresponding with the charging current value after adjustment is simultaneously defeated
Enter to the battery；
The pwm control circuit, is suitable to the corresponding relation according to default magnitude of voltage and PWM ripple dutycycles, will be described to be charged
The battery current voltage value of equipment is converted into the 2nd PWM ripples of duty ratio corresponding and sends.
23. charging equipments as claimed in claim 22, it is characterised in that the PWM detections circuit includes：Sample circuit,
It is suitable to sample a PWM ripples, to obtain the dutycycle of a PWM ripples.
24. charging equipments as claimed in claim 23, it is characterised in that the sample circuit includes adc circuit.
25. charging equipments as claimed in claim 22, it is characterised in that the PWM detections circuit includes：First low pass filtered
Ripple device；With the adc circuit or high frequency clock circuit of first low pass filter coupled.
26. charging equipments as claimed in claim 25, it is characterised in that first low pass filter includes following any
It is a kind of：Low-pass first order filter, second-order low-pass filter.
27. charging equipments as claimed in claim 22, it is characterised in that the pwm control circuit includes：Comparator；With
The saw-toothed wave generator of the comparator coupling.
A kind of 28. charging systems, it is characterised in that including：Charger and charging equipment, wherein：
The charging equipment, is suitable to, when the signal of expression current nominal output current value of charger transmission is received, obtain
The current nominal output current value of the charger is taken, the current nominal output current value according to the charger, adjustment is described
The preset charged current value of charging equipment, and charged with the charging current value after adjustment, the charging electricity after the adjustment
Flow valuve is equal to the current nominal output current value of the charger；And, sent to the charger and represent battery current voltage
The signal of value so that the charger exports voltage corresponding with the battery current voltage value signal；
The charger, is suitable to, when the signal of expression battery current voltage value of charging equipment transmission is received, obtain institute
The battery current voltage value of charging equipment is stated, according to the battery current voltage value, the output voltage of charger is adjusted；With
And, when the voltage on DP ports are detected reaches preset duration higher than the duration of preset voltage value, by holding state short circuit
DM ports are disconnected with the DP ports, and the signal for representing current nominal output current value is sent by the DM ports.
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| CN106410303B (en) * | 2015-07-27 | 2019-02-19 | 小米科技有限责任公司 | Charging method and device |
| CN106385061B (en) * | 2015-07-28 | 2020-03-10 | 摩托罗拉移动通信软件（武汉）有限公司 | Low-voltage linear charging method and adapter |
| CN104967199B (en) * | 2015-08-05 | 2018-07-10 | 青岛海信移动通信技术股份有限公司 | Fast charge method and mobile terminal |
| CN105337353B (en) * | 2015-11-04 | 2018-03-27 | 厦门美图移动科技有限公司 | A kind of charger for mobile phone and its safety certifying method and system |
| CN106230037B (en) * | 2016-07-25 | 2019-06-25 | 四川苏格通讯技术有限公司 | A kind of electronic mobile device charging method, charging unit and charging circuit |
| CN106487064A (en) * | 2016-11-11 | 2017-03-08 | 广州极飞科技有限公司 | Method for charging batteries, charger and rechargeable battery |
| CN106655359B (en) * | 2016-11-29 | 2020-03-27 | 努比亚技术有限公司 | Wireless charging method and device based on NFC communication |
| US20180254648A1 (en) * | 2017-03-01 | 2018-09-06 | Dialog Semiconductor (Uk) Limited | Applying Alternate Modes of USB Type-C for Fast Charging Systems |
| CN112572179B (en) * | 2019-09-29 | 2023-01-06 | 比亚迪股份有限公司 | Method of controlling starting battery charging, battery manager, electric vehicle, and medium |
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