CN109980703A - Charge control method and charging unit and charging circuit therein - Google Patents
Charge control method and charging unit and charging circuit therein Download PDFInfo
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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
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- 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
Abstract
The present invention provides a kind of charge control method and charging unit and charging circuit therein.Charge control method of the invention, wherein a charging circuit converts the supply voltage of a DC power supply and generates a charging voltage and a charging current, to charge to a battery, which includes: setting supply voltage as an initial voltage；Whether detection charging voltage reaches a scheduled voltage；When the charging voltage of battery is lower than scheduled voltage, send a control signal to DC power supply to reduce supply voltage；When charging current or charging voltage accordingly reduce, send control signal to DC power supply to improve supply voltage；The step of repeating above-mentioned reduction and/or improving supply voltage reaches scheduled voltage until charging voltage.
Description
Technical field
The present invention relates to a kind of charge control methods, in particular according to the charging voltage or charging current of battery, with control
Thus supply voltage caused by DC power supply reduces a kind of charge control method of charging energy loss, moreover, it relates to
Using the charging unit and charging circuit therein of the charge control method.
Background technique
A referring to Fig.1, one known charge circuit 10 of display receive the supply voltage Vdc of a DC power supply 2, and conversion electric power
Voltage Vdc and generate a charge power supply to charge to a battery BAT.Wherein charge power supply include a charging voltage Vbat with
One charging current Ibat.Also, Figure 1B shows charging voltage Vbat and charging when known charge circuit 10 charges to battery BAT
The relationship of electric current Ibat, wherein known charge circuit 10 is in the different charging stages respectively with constant current mode and constant voltage mode pair
Battery BAT charges.But the charging voltage Vbat of supply voltage Vdc and battery BAT provided by DC power supply 2, therebetween
Dropout voltage (Dropout voltage, Vdrop) may be very big；When dropout voltage Vdrop is excessive, will cause meaningless
A large amount of energy losses, and known charging circuit 10 can't be adjusted for dropout voltage Vdrop.Slightly have to the application related
: known charge circuit 10 can detect operating temperature.When operating temperature is excessively high, it is known that charging circuit 10 can be reduced to battery
The charging current Ibat of BAT, to cool down.However, this cool-down method reduces charging current Ibat, charging will be also reduced
Efficiency causes the charging time too long.Also, the mode of operating temperature is detected, and inaccurate.
In addition, application related to the present invention is also: United States Patent (USP) US 6100667A, US8816648B2 and US
6437549B1。
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art and defect, propose a kind of charge control method and the dress that charges
It sets and charging circuit therein, can reduce charging energy loss, improve charge efficiency.
In order to achieve the above-mentioned object of the invention, one of viewpoint is sayed that the present invention provides a kind of charging units, includes:
One DC power supply；And a charging circuit, it is coupled to the DC power supply；Wherein the charging circuit includes: a power-switching circuit,
To receive the DC power supply, and convert a supply voltage of the DC power supply and generate a charge power supply, with to a battery into
Row charging, wherein the charge power supply includes a charging voltage and a charging current；And a control unit, to control the electricity
Power-switching circuit, wherein the control unit detects a dropout voltage of the charging circuit, and according to the pressure difference during a charging
Voltage and adjust the supply voltage, to reduce the dropout voltage；Wherein the dropout voltage refers to the supply voltage and charging electricity
The difference of pressure.
In one embodiment, which adjusts the supply voltage with following operative step, to reduce the dropout voltage:
S1: the supply voltage is set as an initial voltage；S2: the charging voltage is detected, if reach a scheduled voltage；S3: when this
When charging voltage is lower than the scheduled voltage, which send a control signal to the DC power supply to reduce power supply electricity
Pressure；S5: judging whether the charging voltage or the charging current accordingly reduce with step S3, wherein when the charging voltage or this fill
When electric current is reduced with step S3, S6 is entered step；S6: the charging circuit gives the control signal to the DC power supply to improve
The supply voltage；S8: judge whether the charging voltage and/or the charging current correspondingly increase with step S6；Wherein in step
After S5, when the charging voltage and the charging current do not reduce accordingly with step S3, step S2 is returned to；After step S8, when
When the charging voltage and/or the charging current are correspondinglyd increase with step S6, step S2 is returned to.
In one embodiment, after step S8, when the charging voltage or the charging current are not correspondinglyd increase with step S6,
Return to step S6.
In one embodiment, the step of which adjusts the supply voltage also includes step S51: after step S5, when
When the charging voltage and the charging current do not reduce accordingly with step S3, after more one first preset time of waiting, step is just returned to
Rapid S2.
In one embodiment, the step of which adjusts the supply voltage also includes step S81: after step S8, when
When the charging voltage and/or the charging current are correspondinglyd increase with step S6, after more one second preset time of waiting, step is just returned to
Rapid S2.
In one embodiment, the step of which adjusts the supply voltage also includes step S82: after step S8, when
When the charging voltage or the charging current are not correspondinglyd increase with step S6, after more waiting a third preset time, step is just returned to
Rapid S6.
In one embodiment, the step of which adjusts the supply voltage also includes step S4 and/or S7 and S10,
Wherein: step S4 includes: to detect the supply voltage after step S3, is just entered when the supply voltage changes with step S3
Step S5, otherwise enters step S10；Step S7 includes: to detect the supply voltage after step S6, when the supply voltage is with step
Rapid S6 and while changing, just enters step S8, otherwise enter step S10；Wherein step S10 includes at least one following operation: (1)
Stop adjusting the supply voltage；(2) it is multiple to the DC power supply to repeatedly transmit the control signal, and whether detects the supply voltage
It correspondinglys increase or reduces therewith, when the number for transmitting the control signal reaches a pre-determined number and the supply voltage not phase therewith
When should increase or decrease, just stop adjusting the supply voltage；(3) charging circuit adjusts the charging current, until one it is preset most
Low current value.
In one embodiment, in step S2 or other either steps or after, when the charging voltage reaches the scheduled voltage
When, stop adjusting the supply voltage.
In one embodiment, in step S3 or S6, power supply electricity is accordingly reduced or improves with the voltage difference of a default
Pressure.
In one embodiment, which is the power bus rule for meeting an adjustable charging voltage and/or charging current
Power supply adaptor (adaptor), mobile power source or the power supply circuit of model.
In one embodiment, the power bus specification of the adjustable charging voltage and/or charging current is USB Power
One of Delivery, PumpExpress or Quick Charge 3.0.
In one embodiment, which passes through the adjustable charging voltage and/or the power bus specification of charging current
A communication interface and transmit the control signal.
Another viewpoint is sayed that present invention provides a kind of charging circuits, includes: a power-switching circuit, to connect
A DC power supply is received, and converts a supply voltage of the DC power supply and generates a charge power supply, to charge to a battery,
Wherein the charge power supply includes a charging voltage and a charging current；And a control unit, to control power supply conversion
Circuit, wherein one charging during, which detects a dropout voltage of the charging circuit, and according to the dropout voltage and
The supply voltage is adjusted, to reduce the dropout voltage；Wherein the dropout voltage refers to the difference of the supply voltage Yu the charging voltage
Value.
Another viewpoint is sayed, present invention provides a kind of charge control methods, wherein a charging circuit receives always
Galvanic electricity source, and convert a supply voltage of the DC power supply and generate a charge power supply, to charge to a battery, wherein should
Charge power supply includes a charging voltage and a charging current；The charge control method includes: during a charging, detecting this and fills
One dropout voltage of circuit, and the supply voltage is adjusted according to the dropout voltage, to reduce the dropout voltage；The wherein pressure
Potential difference refers to the difference of the supply voltage Yu the charging voltage.
In one embodiment, the step of reducing the dropout voltage includes: S1: setting the supply voltage as an initial voltage；S2:
Detect the charging voltage, if reach a scheduled voltage；S3: when the charging voltage is lower than the scheduled voltage, the charging
Circuit send a control signal to the DC power supply to reduce the supply voltage；S5: judging the charging voltage or the charging current is
It is no accordingly to be reduced with step S3, wherein entering step S6 when the charging voltage or the charging current are reduced with step S3；
S6: the charging circuit gives the control signal to the DC power supply to improve the supply voltage；S8: judge the charging voltage and/or
Whether the charging current correspondinglys increase with step S6；Wherein after step S5, when the charging voltage and the charging current not with
Step S3 and when accordingly reducing, return to step S2；After step S8, when the charging voltage and/or the charging current are with step S6
And when correspondingling increase, return to step S2.
In one embodiment, after step S8, when the charging voltage or the charging current are not correspondinglyd increase with step S6,
Return to step S6.
In one embodiment, after step S8, when the charging voltage or the charging current are not correspondinglyd increase with step S6,
Return to step S6.
In one embodiment, which also includes step S51: after step S5, when the charging voltage and this fill
When electric current does not reduce accordingly with step S3, after more one first preset time of waiting, step S2 is just returned to.
In one embodiment, which also includes step S81: after step S8, when the charging voltage and/or being somebody's turn to do
When charging current is correspondinglyd increase with step S6, after more one second preset time of waiting, step S2 is just returned to.
In one embodiment, which also includes step S82: after step S8, when the charging voltage or this fill
When electric current is not correspondinglyd increase with step S6, after more waiting a third preset time, step S6 is just returned to.
In one embodiment, which also includes step S4 and/or S7 and S10, in which: step S4 includes:
After step S3, the supply voltage is detected, just enters step S5 when the supply voltage changes with step S3, otherwise enters step
Rapid S10；Step S7 includes: to detect the supply voltage after step S6, is just entered when the supply voltage changes with step S6
Step S8, otherwise enters step S10；Wherein step S10 includes at least one following operation: (1) stopping adjusting the supply voltage；
(2) it is multiple to the DC power supply to repeatedly transmit the control signal, and detects whether the supply voltage correspondinglys increase or reduce therewith,
When the number for transmitting the control signal reaches a pre-determined number and the supply voltage is not correspondinglyd increase or reduced therewith, just stop
Only adjust the supply voltage；And/or (3) charging circuit adjusts the charging current, until a preset minimum current value.
In one embodiment, in step S2 or other either steps or after, when the charging voltage reaches the scheduled voltage
When, stop adjusting the supply voltage.
In one embodiment, in step S3 or S6, power supply electricity is accordingly reduced or improves with the voltage difference of a default
Pressure.
Detailed description of the invention
Figure 1A shows that schematic diagram is arranged in the charging of known technology；
Figure 1B shows the charging stage schematic diagram of known technology；
Fig. 2 shows charging setting schematic diagram according to an embodiment of the invention；
Fig. 3 A, 3B show charge control method flow chart according to an embodiment of the invention；
Fig. 4 shows the charging stage schematic diagram of two embodiments according to the present invention；
Fig. 5 shows charge control method flow chart according to an embodiment of the invention；
Fig. 6 shows charging setting schematic diagram according to an embodiment of the invention.
Symbol description in figure
2: DC power supply
10: known charge circuit
20: charging circuit
21,31: control unit
22: power-switching circuit
200: charging unit
BAT: battery
C1, C2, C3: operating process
Ibat: charging current
Ip1, Ip2: predetermined charging current
Ipmi: preset minimum current value
S1, S2, S3, S4, S5, S51, S6, S7, S8, S81, S82, S9, S10: step
Vbat: charging voltage
Vdc: supply voltage
Vdrop: dropout voltage
Vp: scheduled voltage
Specific embodiment
It is related to aforementioned and other technology contents, feature and effect of the invention, in the preferred embodiment below with reference to attached drawing
Detailed description in, can clearly present.Attached drawing in the present invention belongs to signal, is mostly intended to indicate each device and each member
Function relationship between part then and not according to ratio is drawn as shape, thickness and width.
Referring to Fig. 2, wherein showing the electricity of one embodiment of charging unit according to the present invention and charging circuit therein
Road schematic diagram (charging unit 200, charging circuit 20), charging unit 200 include DC power supply 2 and charging circuit 20, charging
Circuit 20 converts a supply voltage Vdc of DC power supply 2 and generates a charge power supply, to charge to battery BAT.
Charging circuit 20 includes control unit 21 and power-switching circuit 22.Power-switching circuit 22 is to convert direct current
One supply voltage Vdc of power supply 2 and generate a charge power supply, to charge to battery BAT, wherein charge power supply include charging
Voltage Vbat and charging current Ibat.Control unit 21 then to control power-switching circuit 22, wherein one charging during,
Control unit 21 detects a dropout voltage (Dropout voltage, Vdrop) for charging circuit 20, and according to dropout voltage
Vdrop and adjust supply voltage Vdc, to reduce dropout voltage Vdrop；Wherein dropout voltage Vdrop refer to supply voltage Vdc with
The difference of charging voltage Vbat.
In one embodiment, control unit 21 send a control to believe according to charging voltage Vbat and/or charging current Ibat
Number CTRL adjusts supply voltage Vdc to DC power supply 2.Wherein power-switching circuit 22 can be such as, but not limited to linear power supply
Conversion circuit or switched-mode power supply conversion circuit.
In one embodiment, DC power supply 2 above-mentioned, charging circuit 20 and control unit meet such as, but not limited to USB
Power Delivery, PumpExpress or Quick Charge 3.0 etc. or other similar there is adjustable charging voltage
And/or the power bus specification of charging current, in one embodiment, DC power supply 2 may be, for example, one and meet any of the above-described power supply
Power supply adaptor (adaptor), mobile power source or the power supply circuit of bus specification；It in one embodiment, can be by meeting
The communication interface of any of the above-described power bus specification and transmit control signal CTRL above-mentioned.
Referring to Fig. 3 A, 3B and 5, wherein showing the control flow chart of two embodiments of charging circuit according to the present invention
(while also corresponding to charge control method of the invention), also charging stage schematic diagram referring to figure 4..Firstly, charging circuit
20 receive a supply voltage Vdc caused by DC power supply 2, to be charged (step S1) to battery BAT, in an embodiment
In, supply voltage Vdc may be set to an initial voltage (such as, but not limited to 5V).After battery BAT starts to be charged, detection
Charging voltage Vbat, if reach a scheduled voltage Vp (step S2), wherein scheduled voltage Vp (Fig. 4) is such as, but not limited to
It can be the saturation charging voltage (such as 4.2V or one set according to needs voltage value) of battery BAT；In one embodiment,
After step S2, when charging voltage Vbat has reached scheduled voltage Vp, it can be attached to step S9, such as, but not limited to by power supply
Voltage Vdc is set as initial voltage (such as, but not limited to 5V).
On the other hand, when charging voltage Vbat is lower than scheduled voltage Vp, it is however generally that, representative may be still main
Charging stage (such as control current-mode), the at this time dropout voltage (Dropout of supply voltage Vdc and charging voltage Vbat
Voltage, Vdrop) it is excessive, this is likely to result in a large amount of energy losses, and overheats charging circuit 20.According to the present invention, work as battery
The charging voltage Vbat of BAT be lower than scheduled voltage Vp when, charging circuit 20 can send a control signal CTRL to DC power supply 2 with
It reduces supply voltage Vdc (step S3), then, and judges whether supply voltage Vdc decreases step S4；When battery BAT's
It when charging voltage Vbat is lower than scheduled voltage Vp, indicates that dropout voltage is excessive, therefore send control signal to DC power supply 2 to drop
Low supply voltage Vdc, thus reduces dropout voltage.
However, different DC power supplies 2 might have the output setting combination of different electrical power voltage Vdc, in some instances it may even be possible to complete
It is adjusted completely without method, so DC power supply 2 receives control signal CTRL and can not necessarily decrease supply voltage Vdc.First
At least one in the case of kind, when supply voltage Vdc is not decreased, charging circuit 20 can perform the following operation (step S10,
Fig. 3 B): (1) stop adjusting the supply voltage, it is multiple to the DC power supply that (2) repeatedly transmit the control signal, and detects the electricity
Whether source voltage correspondinglys increase or reduces therewith, and when number one pre-determined number of arrival for transmitting the control signal, the power supply is electric
Pressure is when correspondingling increase or reduces therewith, just the stopping adjustment supply voltage, (3) according to a preset minimum current value Ipmi,
Charge to battery BAT, wherein when supply voltage Vdc do not reduce and dropout voltage (Dropout voltage, Vdrop) still
When excessive, because power is equal to the product of voltage and electric current, in the case where voltage can not be reduced, energy loss is reduced in the present embodiment
Mode can are as follows: charging circuit 20 reduces the charging current Ibat to battery BAT.In the latter case, when DC power supply 2 receives
When controlling signal and reducing supply voltage Vdc, then the charging current Ibat (step S5, Fig. 3 A) or charging electricity of battery BAT are detected
Press Vbat (step S5, Fig. 5), when supply voltage Vdc reduce but battery BAT charging current Ibat or charging voltage Vbat not
When reducing with the downgrading (i.e. step S3) of supply voltage Vdc, step S2 such as, but not limited at this moment can be returned to, is implemented one
In example, after step S5, when charging current Ibat (or charging voltage Vbat) not downgrading and accordingly reduce with supply voltage Vdc
When, it more waits after a preset time (step S51, such as, but not limited to 10 seconds), just returns to step S2；Or to supply voltage
Adjustment can stop at this (not actively control charging circuit 20, leave charging circuit 20 according to the hardware mechanisms of its circuit come
Running).
On the other hand, when supply voltage Vdc is reduced but the charging current Ibat or charging voltage Vbat of battery BAT also drop
When low, then send control signal to DC power supply 2 to improve supply voltage Vdc (S6).When battery BAT charging current Ibat or fill
When piezoelectric voltage Vbat is reduced with supply voltage Vdc and and then reduced, representing, which reduces supply voltage Vdc, produces negative effect, lifts
For example, the minimum that power-switching circuit 22 can bear may be lower than due to dropout voltage Vdrop, cause to charge
Electric current Ibat is likely lower than the predetermined charging current Ip2 in control current-mode (Fig. 4), and (another example, may be in pre-charging stage
In be lower than predetermined charging current Ip1), or cause charging voltage Vbat be likely lower than control voltage mode in predetermined charging electricity
Pressure, causes charge efficiency to reduce, and above situation indicates that supply voltage Vdc be allowed to drop to current level, and should
Supply voltage Vdc is up adjusted, according to the present invention, at this moment can send control signal CTRL to DC power supply 2 to improve supply voltage
Vdc (step S6).
Then, the supply voltage (step S7) is detected once again, when supply voltage Vdc is mentioned with the control of control signal CTRL
Gao Shi, then then judge whether charging voltage Vbat (or charging current Ibat) correspondinglys increase with the height-regulating of supply voltage Vdc
(step S8), when charging current Ibat (S8, Fig. 3 A) or charging voltage Vbat also with raising when (S8, Fig. 5) when, indicate pass through
Step S3~S6 has found current optimal supply voltage Vdc.Later, in one embodiment, step S2 can be returned to, continues to judge
The charging voltage Vbat of battery BAT, if reach scheduled voltage Vp.As the charging voltage Vbat of battery BAT, predetermined electricity is reached
When pressure value Vp, stop the supply voltage Vdc (S9) that adjustment DC power supply 2 provides, at this moment to the Main Stage of battery BAT charging
Through completing, in one embodiment, in step S9, DC power supply can be set to such as, but not limited to initial voltage value.It is subsequent,
Control voltage mode (Fig. 4) such as, but not limited to can be used to charge battery BAT.
And in one embodiment, after step S8, when charging voltage Vbat (or charging current Ibat) is with supply voltage Vdc
Height-regulating and when correspondingling increase, more wait after a preset time (step S81, such as, but not limited to 30 seconds), just return to step S2,
In other words, due to having found current optimal supply voltage Vdc by step S3~S6, optimal power supply voltage that can be current
Vdc persistently charged after a period of time, then row judges whether to repeat the adjustment process of above-mentioned supply voltage Vdc.
On the other hand, in step S7, when judging that supply voltage Vdc is not improved with control signal CTRL, implement one
In example, this can be stopped to the adjustment of supply voltage and (do not control charging circuit 20 actively, charging circuit 20 of leaving is according to its electricity
The hardware mechanisms on road operate)；Or in one embodiment, step S10 can be connected.When DC power supply 2 receives control letter
Number, but when not adjusting the supply voltage Vdc of output, indicate that supply voltage Vdc can be lowered but cannot be raised, therefore implement one
In example, wrong warning at this moment can also be issued.
When whether detection supply voltage Vdc improves (S7), discovery supply voltage Vdc is improved, but detects the charging of battery BAT
Whether electric current Ibat or charging voltage Vbat improve (S8), when discovery does not improve, at this moment can stop to the adjustment of supply voltage
In this (not controlling charging circuit 20 actively, charging circuit 20 of leaving is operated according to the hardware mechanisms of its circuit)；Implement one
In example, step S6 can be returned to, reattempts and improves supply voltage Vdc.In one embodiment, can more wait a preset time (such as
But 10 seconds are not limited to, S82) after, just return to step S6.
In one embodiment, the side of above-mentioned reduction supply voltage Vdc (step S3) or raising supply voltage Vdc (step S6)
Formula can reduce or improve respectively every time the voltage difference of a default, it is, whenever needing to adjust, with the voltage difference of default
Value accordingly to adjust supply voltage Vdc.
Referring to Fig. 4, show in an embodiment according to the present invention, DC power supply 2 is in the leading portion of operating process C1, according to control
Signal CTRL processed and gradually reduce supply voltage Vdc, to approach charging voltage Vbat, thus reduce dropout voltage to reduce energy
Damage.However, discovery will cause charging voltage Vbat and also decrease (example in the control process for constantly reducing supply voltage Vdc
Such as the T1 in Fig. 4, such as, but not limited to the charging voltage level lower than default former before T1), therefore, such as abovementioned steps S6 (figure
5) described, send control signal CTRL to DC power supply 2 to improve supply voltage Vdc, to improve charging voltage Vbat (such as Fig. 4
In T2 and T3), and continue to maintain dropout voltage Vdrop in control range.
Referring now still to Fig. 4, in the leading portion of operating process C2, in the control process for reducing supply voltage Vdc, it is also possible to make
It is too low at dropout voltage Vdrop and cause and charging current Ibat is made also to decrease (such as the T4 in Fig. 4, such as but not
It is limited to lower than preset charging current level former before T4), therefore, as described in abovementioned steps S6 (Fig. 3 A), send control signal extremely
DC power supply 2 is to improve supply voltage Vdc, to improve charging current Ibat (such as T5 in Fig. 4), and continues to maintain pressure difference
Voltage Vdrop is in control range.
Mode of operation of the invention is different from known technology, is a technology being dynamically adapted, can maintain dropout voltage
Vdrop can ensure that charging voltage Vbat and charging current Ibat without departing from being wanted in energy loss in control range, is greatly decreased
Target value.
It should be noted that: the present invention is not limited to Fig. 3 A, step shown in 5, and can plant under spirit of the invention
Kind variation.
For example, in one embodiment, step S4 (Fig. 3 A, 5) can be omitted, it is, downgrading supply voltage Vdc in step S3
Later, it is not required to detection supply voltage Vdc, and is directly connected step S5 (Fig. 3 A, 5).Similarly, in one embodiment, step
S7 (Fig. 3 A, 5) can be omitted, it is, it is not required to detection supply voltage Vdc after supply voltage Vdc is turned up in step S6, and it is straight
Linking is connect to step S8 (Fig. 3 A, 5).
In another example although Fig. 3 A, in 5, display " judges whether the charging voltage Vbat of battery BAT reaches scheduled voltage
Vp " is step S2, however when implementing, the present invention can the charging voltage Vbat of battery BAT check at any time whether reach predetermined electricity
Pressure value Vp, that is, in any step of charge control method of Fig. 3 A, 5 or between any two steps, when the charging of battery BAT
When voltage Vbat reaches scheduled voltage Vp, it can all stop the supply voltage Vdc for adjusting DC power supply 2.For example, direct current
After reducing supply voltage Vdc after the reception of source 2 control signal, when supply voltage Vdc reduces the charging current of (S3) and battery BAT
When Ibat (S5, Fig. 3 A) or charging voltage Vbat (S5, Fig. 5) are not decreased, S2 can be entered step, judges filling for battery BAT
Whether piezoelectric voltage Vbat reaches scheduled voltage Vp, etc..
In addition, Fig. 3 A, in 5, it is any shown in step (such as step S1, S3, S10, S6, S9, S10, S51, S81, S82
Deng), the step of being not limited to single single action (one-shot), and can there is one persistently to handle the time or processing is multiple；Each judgement
Step (such as step S2, S4, S5, S7, S8) can accordingly judge the duration or accordingly judge number.
For example, above-mentioned judge the step of whether supply voltage Vdc decreases (S4), it is not limited to: when to DC power supply 2
After issuing a secondary control signal, discovery supply voltage Vdc is not decreased immediately, and just step S10 is arrived in linking.In an embodiment
In, one section of default time can be waited, discovery supply voltage Vdc is not reduced, and just step S10 is arrived in linking.
As another example, above-mentioned to judge the step of whether supply voltage Vdc improves (S7), it is not limited to: when to DC power supply 2
After issuing a secondary control signal, discovery supply voltage Vdc is not increased accordingly immediately, and just next movement is arrived in linking.In an embodiment
In, one section of default time can be waited, discovery supply voltage Vdc is not improved, and just next movement is arrived in linking.
Control unit 21 of the invention is not limited to position inside charging circuit 20, can also be by the control outside charging circuit 20
Unit 31 (Fig. 6) processed, according to sensing charging current Ibat or charging voltage Vbat, to decide whether to generate this control signal.
In one embodiment, charging circuit 20 above-mentioned fills battery BAT according to the minimum current value Ipmi of default
The step of electricity, can not be and be directly adjusted to preset minimum current value Ipmi, but gradually adjust；For example, charging circuit 20
The charging current for being supplied to battery BAT can be gradually adjusted, until preset minimum current value Ipmi.Wherein, gradually adjustment can
To be stepped or continous way.
In one embodiment, Fig. 3 A, 5 two embodiments can be used together.It, can be with as shown in figure 4, in entire charging process
Both it had observed whether charging voltage Vbat unreasonably declines, and had also observed whether charging current Ibat unreasonably declined.
Illustrate the present invention for preferred embodiment above, but described above, only to make those skilled in the art
The contents of the present invention are apparent to, interest field not for the purpose of limiting the invention.Under same spirit of the invention, this field
Technical staff is contemplated that various equivalence changes.Between illustrating two steps being directly connected in each embodiment, can plant does not influence to lead
Want other steps of function, it is only necessary to not influence to reach the purpose of the present invention.All this kind, according to the present invention can all teach
Analogize and obtain, therefore, the scope of the present invention should cover above-mentioned and other all equivalence changes.Each embodiment above-mentioned, not
It is limited to be used alone, such as, but not limited to two embodiments can also be used in combination with combined application, or with one of embodiment
Part steps replace the part steps of another embodiment.
Claims (33)
1. a kind of charge control method, which is characterized in that a charging circuit receives a DC power supply, and converts the DC power supply
One supply voltage and generate a charge power supply, to charge to a battery, wherein the charge power supply include a charging voltage with
An and charging current；The charge control method includes:
During a charging, a dropout voltage of the charging circuit is detected, and the supply voltage is adjusted according to the dropout voltage,
To reduce the dropout voltage；Wherein the dropout voltage refers to the difference of the supply voltage Yu the charging voltage.
2. charge control method as described in claim 1, wherein the step of reducing the dropout voltage include:
S1: the supply voltage is set as an initial voltage；
S2: the charging voltage is detected, if reach a scheduled voltage；
S3: when the charging voltage is lower than the scheduled voltage, which send a control signal to the DC power supply to drop
The low supply voltage；
S5: judging whether the charging voltage or the charging current accordingly reduce with step S3, wherein when the charging voltage or being somebody's turn to do
When charging current is reduced with step S3, S6 is entered step；
S6: the charging circuit gives the control signal to the DC power supply to improve the supply voltage；And
S8: judge whether the charging voltage and/or the charging current correspondingly increase with step S6；
Wherein
After step S5, when the charging voltage and the charging current do not reduce accordingly with step S3, step S2 is returned to；
After step S8, when the charging voltage and/or the charging current are correspondinglyd increase with step S6, step S2 is returned to.
3. charge control method as claimed in claim 2, wherein after step S8, when the charging voltage or the charging current
When not correspondingling increase with step S6, step S6 is returned to.
4. charge control method as claimed in claim 2, wherein also include step S51: after step S5, when charging electricity
When pressure and the charging current do not reduce accordingly with step S3, after more one first preset time of waiting, step S2 is just returned to.
5. charge control method as claimed in claim 2, wherein also include step S81: after step S8, when charging electricity
When pressure and/or the charging current are correspondinglyd increase with step S6, after more one second preset time of waiting, step S2 is just returned to.
6. charge control method as claimed in claim 3, wherein also include step S82: after step S8, when charging electricity
When pressure or the charging current are not correspondinglyd increase with step S6, after more waiting a third preset time, step S6 is just returned to.
7. charge control method as claimed in claim 2, wherein also include step S4 and/or S7 and S10, in which:
Step S4 includes: to detect the supply voltage after step S3, and step is just entered when the supply voltage changes with step S3
Rapid S5, otherwise enters step S10；
Step S7 includes: to detect the supply voltage after step S6, and step is just entered when the supply voltage changes with step S6
Rapid S8, otherwise enters step S10；
Wherein step S10 includes at least one following operation:
(1) stop adjusting the supply voltage；
(2) it is multiple to the DC power supply to repeatedly transmit the control signal, and detect the supply voltage whether correspondingly increase therewith or
It reduces, when the number for transmitting the control signal reaches a pre-determined number and the supply voltage is not correspondinglyd increase or reduced therewith,
Just stop adjusting the supply voltage；And/or
(3) charging circuit adjusts the charging current, until a preset minimum current value.
8. charge control method as claimed in claim 2, wherein in step S2 or other either steps or after, when this is filled
When piezoelectric voltage reaches the scheduled voltage, stop adjusting the supply voltage.
9. charge control method as claimed in claim 2, wherein in step S3 or S6, the phase with the voltage difference of a default
It should reduce or improve the supply voltage.
10. a kind of charging unit, characterized by comprising:
One DC power supply；And
One charging circuit is coupled to the DC power supply；Wherein the charging circuit includes:
One power-switching circuit to receive the DC power supply, and converts a supply voltage of the DC power supply and generates one and fill
Power supply, to charge to a battery, wherein the charge power supply includes a charging voltage and a charging current；And
One control unit, to control the power-switching circuit, wherein the control unit detects charging electricity during a charging
One dropout voltage on road, and the supply voltage is adjusted according to the dropout voltage, to reduce the dropout voltage；Wherein pressure difference electricity
Pressure refers to the difference of the supply voltage Yu the charging voltage.
11. charging unit as claimed in claim 10, wherein the control unit adjusts power supply electricity with following operative step
Pressure, to reduce the dropout voltage:
S1: the supply voltage is set as an initial voltage；
S2: the charging voltage is detected, if reach a scheduled voltage；
S3: when the charging voltage is lower than the scheduled voltage, which send a control signal to the DC power supply to drop
The low supply voltage；
S5: judging whether the charging voltage or the charging current accordingly reduce with step S3, wherein when the charging voltage or being somebody's turn to do
When charging current is reduced with step S3, S6 is entered step；
S6: the charging circuit gives the control signal to the DC power supply to improve the supply voltage；And
S8: judge whether the charging voltage and/or the charging current correspondingly increase with step S6；
Wherein
After step S5, when the charging voltage and the charging current do not reduce accordingly with step S3, step S2 is returned to；
After step S8, when the charging voltage and/or the charging current are correspondinglyd increase with step S6, step S2 is returned to.
12. charging unit as claimed in claim 11, wherein after step S8, when the charging voltage or the charging current not
When correspondingling increase with step S6, step S6 is returned to.
13. charging unit as claimed in claim 11, wherein it includes step that the control unit, which adjusts the step of supply voltage also,
Rapid S51: after step S5, when the charging voltage and the charging current do not reduce accordingly with step S3, one first is more waited
After preset time, step S2 is just returned to.
14. charging unit as claimed in claim 11, wherein it includes step that the control unit, which adjusts the step of supply voltage also,
Rapid S81: after step S8, when the charging voltage and/or the charging current are correspondinglyd increase with step S6, one second is more waited
After preset time, step S2 is just returned to.
15. charging unit as claimed in claim 12, wherein it includes step that the control unit, which adjusts the step of supply voltage also,
Rapid S82: after step S8, when the charging voltage or the charging current are not correspondinglyd increase with step S6, a third is more waited
After preset time, step S6 is just returned to.
16. charging unit as claimed in claim 11, wherein it includes step that the control unit, which adjusts the step of supply voltage also,
Rapid S4 and/or S7 and S10, in which:
Step S4 includes: to detect the supply voltage after step S3, and step is just entered when the supply voltage changes with step S3
Rapid S5, otherwise enters step S10；
Step S7 includes: to detect the supply voltage after step S6, and step is just entered when the supply voltage changes with step S6
Rapid S8, otherwise enters step S10；
Wherein step S10 includes at least one following operation:
(1) stop adjusting the supply voltage；
(2) it is multiple to the DC power supply to repeatedly transmit the control signal, and detect the supply voltage whether correspondingly increase therewith or
It reduces, when the number for transmitting the control signal reaches a pre-determined number and the supply voltage is not correspondinglyd increase or reduced therewith,
Just stop adjusting the supply voltage；And/or
(3) charging circuit adjusts the charging current, until a preset minimum current value.
17. charging unit as claimed in claim 11, wherein in step S2 or other either steps or after, when the charging
When voltage reaches the scheduled voltage, stop adjusting the supply voltage.
18. charging unit as claimed in claim 11, wherein in step S3 or S6, the phase with the voltage difference of a default
It should reduce or improve the supply voltage.
19. charging unit as claimed in claim 10, wherein the DC power supply be meet an adjustable charging voltage and/or
Power supply adaptor, mobile power source or the power supply circuit of the power bus specification of charging current.
20. charging unit as claimed in claim 19, wherein the power supply of the adjustable charging voltage and/or charging current is total
Line gauge model is one of USB Power Delivery, PumpExpress or Quick Charge 3.0.
21. charging unit as claimed in claim 11, wherein the control unit is by the adjustable charging voltage and/or fills
One communication interface of the power bus specification of electric current and transmit the control signal.
22. a kind of charging circuit, characterized by comprising:
One power-switching circuit to receive a DC power supply, and converts a supply voltage of the DC power supply and generates one and fill
Power supply, to charge to a battery, wherein the charge power supply includes a charging voltage and a charging current；And
One control unit, to control the power-switching circuit, wherein the control unit detects charging electricity during a charging
One dropout voltage on road, and the supply voltage is adjusted according to the dropout voltage, to reduce the dropout voltage；Wherein pressure difference electricity
Pressure refers to the difference of the supply voltage Yu the charging voltage.
23. charging circuit as claimed in claim 22, wherein the control unit adjusts power supply electricity with following operative step
Pressure, to reduce the dropout voltage:
S1: the supply voltage is set as an initial voltage；
S2: the charging voltage is detected, if reach a scheduled voltage；
S3: when the charging voltage is lower than the scheduled voltage, which send a control signal to the DC power supply to drop
The low supply voltage；
S5: judging whether the charging voltage or the charging current accordingly reduce with step S3, wherein when the charging voltage or being somebody's turn to do
When charging current is reduced with step S3, S6 is entered step；
S6: the charging circuit gives the control signal to the DC power supply to improve the supply voltage；And
S8: judge whether the charging voltage and/or the charging current correspondingly increase with step S6；
Wherein
After step S5, when the charging voltage and the charging current do not reduce accordingly with step S3, step S2 is returned to；
After step S8, when the charging voltage and/or the charging current are correspondinglyd increase with step S6, step S2 is returned to.
24. charging circuit as claimed in claim 23, wherein after step S8, when the charging voltage or the charging current not
When correspondingling increase with step S6, step S6 is returned to.
25. charging circuit as claimed in claim 23, wherein it includes step that the control unit, which adjusts the step of supply voltage also,
Rapid S51: after step S5, when the charging voltage and the charging current do not reduce accordingly with step S3, one first is more waited
After preset time, step S2 is just returned to.
26. charging circuit as claimed in claim 23, wherein it includes step that the control unit, which adjusts the step of supply voltage also,
Rapid S81: after step S8, when the charging voltage and/or the charging current are correspondinglyd increase with step S6, one second is more waited
After preset time, step S2 is just returned to.
27. charging circuit as claimed in claim 24, wherein it includes step that the control unit, which adjusts the step of supply voltage also,
Rapid S82: after step S8, when the charging voltage or the charging current are not correspondinglyd increase with step S6, a third is more waited
After preset time, step S6 is just returned to.
28. charging circuit as claimed in claim 23, wherein it includes step that the control unit, which adjusts the step of supply voltage also,
Rapid S4 and/or S7 and S10, in which:
Step S4 includes: to detect the supply voltage after step S3, and step is just entered when the supply voltage changes with step S3
Rapid S5, otherwise enters step S10；
Step S7 includes: to detect the supply voltage after step S6, and step is just entered when the supply voltage changes with step S6
Rapid S8, otherwise enters step S10；
Wherein step S10 includes at least one following operation:
(1) stop adjusting the supply voltage；
(2) it is multiple to the DC power supply to repeatedly transmit the control signal, and detect the supply voltage whether correspondingly increase therewith or
It reduces, when the number for transmitting the control signal reaches a pre-determined number and the supply voltage is not correspondinglyd increase or reduced therewith,
Just stop adjusting the supply voltage；And/or
(3) charging circuit adjusts the charging current, until a preset minimum current value.
29. charging circuit as claimed in claim 23, wherein in step S2 or other either steps or after, when the charging
When voltage reaches the scheduled voltage, stop adjusting the supply voltage.
30. charging circuit as claimed in claim 23, wherein in step S3 or S6, the phase with the voltage difference of a default
It should reduce or improve the supply voltage.
31. charging circuit as claimed in claim 22, wherein the DC power supply be meet an adjustable charging voltage and/or
Power supply adaptor, mobile power source or the power supply circuit of the power bus specification of charging current.
32. charging circuit as claimed in claim 31, wherein the power supply of the adjustable charging voltage and/or charging current is total
Line gauge model is one of USB Power Delivery, PumpExpress or Quick Charge 3.0.
33. charging circuit as claimed in claim 23, wherein the control unit is by the adjustable charging voltage and/or fills
One communication interface of the power bus specification of electric current and transmit the control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711444586.0A CN109980703A (en) | 2017-12-27 | 2017-12-27 | Charge control method and charging unit and charging circuit therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711444586.0A CN109980703A (en) | 2017-12-27 | 2017-12-27 | Charge control method and charging unit and charging circuit therein |
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| Publication Number | Publication Date |
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| CN109980703A true CN109980703A (en) | 2019-07-05 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711444586.0A Withdrawn CN109980703A (en) | 2017-12-27 | 2017-12-27 | Charge control method and charging unit and charging circuit therein |
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| CN1512619A (en) * | 2002-12-31 | 2004-07-14 | 广达电脑股份有限公司 | Two section type charging device |
| CN1751426A (en) * | 2003-02-21 | 2006-03-22 | 捷讯研究有限公司 | Circuit and method of operation for an electrical power supply |
| CN101467329A (en) * | 2006-06-14 | 2009-06-24 | 三美电机株式会社 | Charging circuit for secondary battery |
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| US20150077040A1 (en) * | 2013-09-16 | 2015-03-19 | Blue Sea Systems | Power output distribution and control system for multi-output battery charger |
| CN106356933A (en) * | 2016-09-26 | 2017-01-25 | 宇龙计算机通信科技(深圳)有限公司 | Electronic device and charging method thereof |
| CN106849270A (en) * | 2017-03-31 | 2017-06-13 | 深圳市金立通信设备有限公司 | Terminal and charging method |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1512619A (en) * | 2002-12-31 | 2004-07-14 | 广达电脑股份有限公司 | Two section type charging device |
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| CN101467329A (en) * | 2006-06-14 | 2009-06-24 | 三美电机株式会社 | Charging circuit for secondary battery |
| US20100066311A1 (en) * | 2008-09-15 | 2010-03-18 | Research In Motion Limited | Power supply circuit and method for providing output voltage |
| US20150077040A1 (en) * | 2013-09-16 | 2015-03-19 | Blue Sea Systems | Power output distribution and control system for multi-output battery charger |
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