CN106026269A - Rapid charging device and method - Google Patents
Rapid charging device and method Download PDFInfo
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- CN106026269A CN106026269A CN201610482369.XA CN201610482369A CN106026269A CN 106026269 A CN106026269 A CN 106026269A CN 201610482369 A CN201610482369 A CN 201610482369A CN 106026269 A CN106026269 A CN 106026269A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The main technical problem to be solved in the invention is to provide a rapid charging device and method. The rapid charging device comprises a processing chip, a charging chip and a cell, wherein the processing chip is used for controlling the charging chip to charge the cell with a second charging voltage which changes in a curve and increases gradually during a constant current charging phase, controlling the charging chip to charge the cell with a third charging voltage which reduces gradually during a constant voltage charging phase, and controlling the charging chip to charge the cell by retaining full charging voltage until the cell is fully charged when the third charging voltage is reduced gradually to full charging voltage. In this way, a cell entering into a constant voltage charging phase prematurely during a charging process can be prevented, and the charging voltage during the constant voltage charging phase approaches full charging voltage to shorten charging time.
Description
Technical field
The present invention relates to cell art, particularly relate to a kind of fast charge equipment and method.
Background technology
Along with the universal of smart mobile phone and user use the raising of demand in cruising time to mobile phone, it is being subject to
It is limited to lithium ion battery technology cannot make a breakthrough, it is impossible to accomplish the situation with big energy density
Under, intelligent mobile phone battery rapid nitriding is able to the most universal.
Technology of filling soon substantially has three kinds, i.e. high pass Quick Charge (quick charge) version (as
QC2.0, QC3.0), Pump Express and the Pump Express plus of MTK, OPPO's
VOOC dodges and fills technology.
It is all the charging current improving constant-current charging phase that these three is filled on technological essence soon, owing to filling
Electricity electric current is relatively big, and the line loss on charge path is the biggest, and causing charging enters constant-voltage charge earlier
In the stage, constant voltage charging time is longer, but the electricity being filled with is less.
Specifically can be found in the battery charging process schematic diagram that Fig. 1, Fig. 1 are prior art, at Fig. 1
In, abscissa represents time shaft, and vertical coordinate represents charging voltage and the charged electrical of charging chip output
Stream, thicker real segment represents that charging current, thinner real segment represent charging voltage, existing
In technology, it is assumed that Vbat is the real-time voltage of battery, and the full charge pressure of battery is V3=4.2V,
By charging chip, battery is charged, caused by battery self character, general point of battery charging
For the three phases shown in Fig. 1:
Preliminary filling stage T1:Vbat < 3.2V, charging current I1 of charging chip output to battery is
0.1C, exports to battery charging voltage V1=3.2～3.6V.
Constant-current charging phase T2:3.2V < Vbat < 4.2V, charging current I2 is that 0.4C～1.5C (takes
A wherein fixed value), charging voltage V2 is gradually increased to full charge pressure V3, constant-current charging phase
Persistent period shorter, account for three ten ten to percent 2 the percent of total charging time, and be filled with
Electricity more.
Constant voltage charging phase T3: charging voltage be full charge press V3=4.2V, charging current I3 by
The fewest, when charging current I3 reaches 0.05C～0.1C (taking a wherein fixed value), battery fills
Full, the constant voltage charging phase persistent period is longer, accounts for 7 percent ten to percentages of total charging time
80, the electricity being filled with is less.
But conventionally, as charging current I2 of constant-current charging phase is maximum, including battery
The charge path of internal resistance and charging circuit itself there are internal resistance, therefore according to equation U=I*R (U
For the pressure drop of charge path, I is charging current, and R is internal resistance) understand, whole charge path damages
The pressure drop U of consumption is relatively big, and now charging chip is in charging voltage V2 that constant-current charging phase exports
Having is to be electrically charged path as U to be lost greatly, the therefore charged electrical of the actual acquisition of battery
Pressure is V2-U.
Accordingly, because the existence of pressure drop U, charging chip fills the actual output of constant-current charging phase
Piezoelectric voltage enters constant-current charging phase when not arriving full charge pressure V3=4.2V, so that charging
Process enters constant voltage charging phase earlier, and in constant voltage charging phase, charger charged electrical is compacted
Equal to V3-U ' in matter, charging current gradually decreases, and wherein U ' is that internal resistance R is multiplied with charging current
Result, until battery be full of.
Conventionally, as line loss U causes charging process to enter constant voltage charging phase too early,
And the input voltage of constant voltage charging phase is not full charge pressure, constant voltage charging phase is caused to be taken
Between become longer, accordingly, because above reason, in the prior art, total charging interval and reason
Think that charged state compares meeting elongated.
In sum, it is necessary to provide a kind of fast charge equipment and method, to solve the problems referred to above.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of fast charge equipment and method, it is possible to
Avoid the entrance constant voltage charging phase that battery is too early in charging process, and make constant voltage charging phase
Charging voltage is close to full charge pressure, thus shortens the charging interval.
For solving above-mentioned technical problem, the present invention provides a kind of fast charge equipment, including processing core
Sheet, charging chip and battery, process chip and be connected with charging chip, and charging chip is with battery even
Connect, and charging chip obtains charging voltage from external charger and is converted into the charging voltage of correspondence
With charging current so that battery is charged, process chip, be used for: in constant-current charging phase control
Battery is charged, wherein by charging chip with curvilinear motion and the second charging voltage of being gradually increased
Second charging voltage is gradually increased at constant-current charging phase presses one to make a reservation for more than the full charge of battery
Magnitude of voltage, and control charging chip with the 3rd charging voltage pair successively decreased step by step at constant voltage charging phase
Battery is charged, and when the 3rd charging voltage is decremented to full charge pressure, controls charging chip and maintain
With full charge pressure, battery is charged, until battery is full of, the wherein maximum of the second charging voltage
It is worth equal with the minima of the 3rd charging voltage.
Wherein, chip is processed at preliminary filling stage control charging chip to have the first fixed current value
Battery is charged by the first charging current and linear change and the first charging voltage being gradually increased,
Wherein the maximum of the first charging voltage and the minima of the second charging voltage are equal.
Wherein, process chip to fix to have second at constant-current charging phase Synchronization Control charging chip
Battery is charged by the second charging current of current value, and wherein the second fixed current value is more than first
Fixed current value.
Wherein, scheduled voltage be the internal resistance of charging circuit be multiplied with the second charging current gained knot
Really.
Wherein, the 3rd charging voltage is successively decreased step by step with equal or different magnitude of voltage.
The present invention further provides a kind of fast charge method, including: in constant-current charging phase control
Battery is charged, wherein by charging chip with curvilinear motion and the second charging voltage of being gradually increased
Second charging voltage is gradually increased at constant-current charging phase presses one to make a reservation for more than the full charge of battery
Magnitude of voltage；Charging chip is controlled with the 3rd charging voltage successively decreased step by step to electricity at constant voltage charging phase
Pond is charged；When the 3rd charging voltage is decremented to full charge pressure, controls charging chip and maintain with full
Battery is charged by charging voltage, until battery be full of, wherein the maximum of the second charging voltage with
The minima of the 3rd charging voltage is equal.
Wherein, constant-current charging phase control charging chip with curvilinear motion and be gradually increased second
Before the step that battery is charged by charging voltage, the method also includes: at preliminary filling stage control
Charging chip is to have the first charging current of the first fixed current value and linear change and gradually to increase
Battery is charged by the first big charging voltage, the wherein maximum and second of the first charging voltage
The minima of charging voltage is equal.
Wherein, charging chip is controlled with the 3rd charging voltage pair successively decreased step by step at constant voltage charging phase
The step that battery is charged also includes: at constant-current charging phase Synchronization Control charging chip to have
Battery is charged by the second charging current of the second fixed current value, wherein the second fixed current value
More than the first fixed current value.
Wherein, scheduled voltage be the internal resistance of charging circuit be multiplied with the second charging current gained knot
Really.
Wherein, the 3rd charging voltage is successively decreased step by step with equal or different magnitude of voltage.
The invention has the beneficial effects as follows: be different from the situation of prior art, the quick charge of the present invention
Apparatus and method for is by compensating the voltage drop value of line loss at constant-current charging phase, and fills in constant voltage
Electricity the stage by charging voltage hierarchical subtractive clustering to full charge pressure, it is possible to avoid battery mistake in charging process
Entrance constant voltage charging phase early, and make constant voltage charging phase remove the charged electrical outside line loss voltage
Pressure is close to full charge pressure, thus shortens the charging interval.
Accompanying drawing explanation
Fig. 1 is the battery charging process schematic diagram of prior art；
Fig. 2 is the apparatus structure schematic diagram of fast charge equipment according to embodiments of the present invention；
Fig. 3 is that the charging process that battery is charged by charging chip according to embodiments of the present invention is shown
It is intended to；
Fig. 4 is that prior art compares figure with the charging process of the present invention；
Fig. 5 is the flow chart of fast charge method according to embodiments of the present invention.
Detailed description of the invention
The present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
It is the device of fast charge equipment according to embodiments of the present invention referring firstly to Fig. 2, Fig. 2
Structural representation, as in figure 2 it is shown, disclosed fast charge equipment 1 includes processing core
Sheet 30, charging chip 20 and battery 40, process chip 30 and be connected with charging chip 20, fill
Electrical chip 20 is connected with battery 40, and charging chip 20 obtains charging from external charger 10
Voltage and be converted into correspondence charging voltage and charging current so that battery 40 is charged, process
Chip 30 can control charging chip 20 and be charged battery 40.
Specifically, can carry out reference in conjunction with Fig. 3, Fig. 3 is charging core according to embodiments of the present invention
The charging process schematic diagram that battery is charged by sheet.Similar with Fig. 1, in figure 3, abscissa
Representing time shaft, vertical coordinate represents charging voltage and the charging current of charging chip output simultaneously, relatively
Thick real segment represents that charging current, thinner real segment represent charging voltage.
As it is shown on figure 3, process chip 30 can control charging chip 20 with tool at preliminary filling stage T1
There are the first charging current I1 of the first fixed current value and linear change and first filling of being gradually increased
Battery 40 is charged by piezoelectric voltage V1,
Process chip 30 can constant-current charging phase T2 control charging chip 20 with curvilinear motion and
The second charging voltage V2 being gradually increased ' battery 40 is charged, wherein the second charging voltage
V2 ' is gradually increased at constant-current charging phase T2 and presses the predetermined electricity of V3 mono-to more than the full charge of battery 40
Pressure value, the maximum of the first charging voltage V1 and the second charging voltage V2 ' minima equal；
Process chip 30 Synchronization Control charging chip 20 to have the second charged electrical of the second fixed current value
Battery 40 is charged by stream I2, and wherein the second fixed current value is more than the first fixed current value.
Preferably, scheduled voltage is that the internal resistance of charging circuit is multiplied with the second charging current I2 gained
Result.
But, in actual applications, if the internal resistance of charging circuit can not obtain, can suitably by
Scheduled voltage be set to full charge pressure V3 2% to 15% between (choosing according to actual needs),
Although the internal resistance that can not accurately embody charging circuit produces line loss during constant-current charge
Pressure drop, but also can to a certain extent line loss pressure drop be compensated, thus reach similar
Technique effect.
Process chip 30 can constant voltage charging phase control charging chip 20 with successively decrease step by step the 3rd
Charging voltage V3 ' battery 40 is charged, and in the 3rd charging voltage V3 ' it is decremented to full charge
During pressure V3, control charging chip 20 maintains and is charged battery 40, directly with full charge pressure V3
' maximum and the 3rd charging voltage V3 ' it is full of, wherein the second charging voltage V2 to battery 40
Minima is equal.
Specifically, the 3rd charging voltage V3 ' can successively decrease step by step by equal or different magnitude of voltage.
Due to during constant-voltage charge, based on battery behavior, the 3rd charging current I3 ' successively decrease, because of
The line loss pressure drop that the internal resistance of this charging circuit produces during constant-voltage charge is by the 3rd charging
Electric current I3 ' impact is not a fixed value, therefore the embodiment of the present invention utilizes charging chip 20 to electricity
Pond 40 inputs the 3rd charging voltage V3 of successively decreasing step by step ' until equal with full charge pressure V3, thus
Constant voltage charging phase carries out dynamic compensation for line loss pressure drop so that fill at constant voltage charging phase
3rd charging voltage V3 of electrical chip 20 output ' can also be with full charge after line loss
V3 is the most close for pressure, thus makes constant voltage charging phase relative to prior art (as shown in Figure 1)
The charging interval spent is shorter.
In order to make it easy to understand, be please prior art and the filling of the present invention with further reference to Fig. 4, Fig. 4
Electric process comparison figure, as shown in Figure 4, due at constant-current charging phase T2 and constant voltage charging phase
All line loss is carried out voltage compensation, hence in so that the constant-current charging phase T2 of the present invention is relative
Extended in prior art, and the constant voltage charging phase of the present invention is obtained relative to prior art
To shorten, caused by battery 40 self character, constant voltage charging phase can account for total charging time
Ten to eight 17 percent, constant-current charging phase T2 can account for 20 the percent of total charging time to
30 (Fig. 4 for the sake of clarity, do not embody this proportionate relationship, but in the diagram, T3
T2 should be much larger than, and T3 ' should be much larger than T2 ').Therefore after employing technical solution of the present invention, energy
Enough make the constant-current charging phase T2 being filled with electricity more be extended, and make to be filled with electricity relatively
Few constant voltage charging phase is reduced, thus improves charge efficiency, shortens the charging interval.
Therefore, based on techniques disclosed above scheme, the fast charge equipment 1 of the present invention passes through
The voltage drop value of line loss is compensated by constant-current charging phase T2, and will charging at constant voltage charging phase
Voltage hierarchical subtractive clustering presses V3 to full charge, it is possible to avoid battery 40 too early entering in charging process
Enter constant voltage charging phase, and the charging voltage that constant voltage charging phase is removed outside line loss voltage to the greatest extent may be used
V3 can be pressed close to full charge in ground, thus shorten the charging interval.
Hereinafter referring to Fig. 5, the embodiment of the present invention further provides for a kind of fast charge method, figure
5 is the flow chart of fast charge method according to embodiments of the present invention, as shown in Figure 4, the method
Including:
Step S101: control charging chip 20 to have the first fixed current value at preliminary filling stage T1
The first charging current I1 and linear change and the first charging voltage V1 of being gradually increased to battery 40
Be charged, wherein the maximum of the first charging voltage V1 and the second charging voltage V2 ' minimum
It is worth equal.
Step S102: control charging chip 20 with curvilinear motion and gradually at constant-current charging phase T2
The second charging voltage V2 increased ' battery 40 is charged, wherein the second charging voltage V2 '
Constant-current charging phase T2 is gradually increased to full charge pressure V3 mono-scheduled voltage more than battery 40.
Preferably, scheduled voltage is that the internal resistance of charging circuit is multiplied with the second charging current I2 gained
Result.
Step S103: control charging chip 20 at constant voltage charging phase and the 3rd fill with successively decrease step by step
Piezoelectric voltage V3 ' battery 40 is charged, and Synchronization Control charging chip 20 is solid to have second
Battery 40 is charged by the second charging current I2 determining current value, wherein the second fixed current value
More than the first fixed current value.
Step S104: when the 3rd charging voltage is decremented to full charge pressure V3, control charging chip 20
Maintain and with full charge pressure V3, battery 40 is charged, until battery 40 is full of, wherein second
The minima of charging voltage V2 ' maximum and the 3rd charging voltage V3 ' is equal.
Preferably, the 3rd charging voltage V3 ' can successively decrease step by step by equal or different magnitude of voltage.
Therefore, based on techniques disclosed above scheme, the fast charge method of the present invention is by perseverance
The current charge stage, the voltage drop value of line loss was compensated by T2, and at constant voltage charging phase by charged electrical
Pressure hierarchical subtractive clustering presses V3 to full charge, it is possible to avoid the entrance that battery 40 is too early in charging process
Constant voltage charging phase, and make constant voltage charging phase remove the charging voltage outside line loss voltage as far as possible
V3 is pressed close to full charge in ground, thus shortens the charging interval.
It should be noted that above-mentioned battery is preferably lithium ion battery, naturally it is also possible to be polymerized for lithium
Thing battery, nickel-cadmium cell, Ni-MH battery or lead-acid battery.
The foregoing is only embodiments of the present invention, not thereby limit the patent model of the present invention
Enclosing, every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process become
Change, or be directly or indirectly used in other relevant technical fields, be the most in like manner included in the present invention's
In scope of patent protection.
Claims (10)
1. a fast charge equipment, it is characterised in that include process chip, charging chip and
Battery, described process chip is connected with described charging chip, and described charging chip is with described battery even
Connect, and described charging chip obtains charging voltage from external charger and is converted into the charging of correspondence
Voltage and charging current so that described battery is charged, described process chip, be used for:
Constant-current charging phase control described charging chip with curvilinear motion and be gradually increased second
Battery is charged by charging voltage, and wherein said second charging voltage is at described constant-current charging phase
It is gradually increased and presses a scheduled voltage to more than the full charge of described battery, and at constant voltage charging phase
Control described charging chip with the 3rd charging voltage successively decreased step by step, described battery to be charged, and
When described 3rd charging voltage is decremented to described full charge pressure, controls described charging chip and maintain with institute
Stating full charge pressure to be charged described battery, until described battery is full of, wherein said second fills
The maximum of piezoelectric voltage is equal with the minima of described 3rd charging voltage.
Fast charge equipment the most according to claim 1, it is characterised in that described process core
Sheet at charging chip described in preliminary filling stage control to have the first charged electrical of the first fixed current value
Described battery is charged by stream and linear change and the first charging voltage of being gradually increased, Qi Zhongsuo
The maximum stating the first charging voltage is equal with the minima of described second charging voltage.
Fast charge equipment the most according to claim 2, it is characterised in that described process core
Sheet at charging chip described in described constant-current charging phase Synchronization Control to have the second fixed current value
The second charging current described battery is charged, wherein said second fixed current value be more than institute
State the first fixed current value.
Fast charge equipment the most according to claim 3, it is characterised in that described predetermined electricity
Pressure value is that the internal resistance of charging circuit is multiplied with described second charging current acquired results.
Fast charge equipment the most according to claim 1, it is characterised in that the described 3rd fills
Piezoelectric voltage is successively decreased step by step with equal or different magnitude of voltage.
6. a fast charge method, it is characterised in that including:
Constant-current charging phase control described charging chip with curvilinear motion and be gradually increased second
Battery is charged by charging voltage, and wherein said second charging voltage is at described constant-current charging phase
It is gradually increased and presses a scheduled voltage to more than the full charge of described battery；
Described charging chip is controlled with the 3rd charging voltage pair successively decreased step by step at constant voltage charging phase
Described battery is charged；
When described 3rd charging voltage is decremented to described full charge pressure, controls described charging chip and maintain
With described full charge pressure, described battery is charged, until described battery is full of, wherein said the
The maximum of two charging voltages is equal with the minima of described 3rd charging voltage.
Fast charge method the most according to claim 6, it is characterised in that described in constant current
Charging stage controls described charging chip with curvilinear motion and the second charging voltage pair of being gradually increased
Before the step that battery is charged, described method also includes:
At charging chip described in preliminary filling stage control to have the first charging of the first fixed current value
Described battery is charged, wherein by electric current and linear change and the first charging voltage being gradually increased
The maximum of described first charging voltage is equal with the minima of described second charging voltage.
Fast charge method the most according to claim 7, it is characterised in that described in constant voltage
Charging stage controls described charging chip and enters described battery with the 3rd charging voltage successively decreased step by step
The step of row charging also includes:
At charging chip described in described constant-current charging phase Synchronization Control to have the second fixed current
Described battery is charged by the second charging current of value, and wherein said second fixed current value is more than
Described first fixed current value.
Fast charge method the most according to claim 8, it is characterised in that described predetermined electricity
Pressure value is that the internal resistance of charging circuit is multiplied with described second charging current acquired results.
Fast charge method the most according to claim 6, it is characterised in that the described 3rd
Charging voltage is successively decreased step by step with equal or different magnitude of voltage.
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