CN106785144A - A kind of charging method and device - Google Patents
A kind of charging method and device Download PDFInfo
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- CN106785144A CN106785144A CN201611249744.2A CN201611249744A CN106785144A CN 106785144 A CN106785144 A CN 106785144A CN 201611249744 A CN201611249744 A CN 201611249744A CN 106785144 A CN106785144 A CN 106785144A
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- battery
- charge
- charging
- constant
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- 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
- H01M10/448—End of discharge regulating measures
-
- 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
Abstract
The embodiment of the invention provides a kind of charging method and device.On the one hand, when the embodiment of the present invention charges to battery, the charging includes the first charging stage and the second charging stage, wherein, the first charging stage include at least two charging subs, in each charging sub, the first constant-current charge, the second constant-current charge, constant-current discharge and the 3rd constant-current charge are all carried out to battery successively, then, in the second charging stage, constant-voltage charge is carried out to battery.Therefore, raising charging rate can cause battery to there is a problem of larger security risk during technical scheme provided in an embodiment of the present invention can solve the problem that existing charging method.
Description
【Technical field】
The present invention relates to cell art, more particularly to a kind of charging method and device.
【Background technology】
With the continuous lifting of modern science and technology technology, people for electronic product dependency degree more and more higher, as removable
The energy resource supply of dynamic electronic product, battery is also increasingly taken seriously.It is longer that people propose endurance to existing battery, charges
Speed faster, all requirements such as safer.But from the point of view of current battery system, the lifting of energy density is temporarily in bottleneck
Appearance is difficult in phase, short time significantly to be lifted.So must just start with from charging rate, improve the charging speed of battery
Degree, so that mobile electronic product can obtain energy supplement within the shorter time.In the prior art, battery is charged
Most common charging modes are：Constant-current charge to certain voltage, then with constant-voltage charge to cut-off current.
In process of the present invention is realized, inventor has found that at least there are the following problems in the prior art：
For existing charging method, if wanting to improve charging rate, it is necessary to use constant-current charge electric current higher, but fill
The increase of electric current can cause larger polarization phenomena, so that, the rapid decline of anode potential can be caused, and then, cause anode
Lithium phenomenon is analysed in generation, causes battery to there is larger security risk.Therefore, it is badly in need of a kind of new charging modes to meet battery
Quick charge and demand for security.
【The content of the invention】
In view of this, a kind of charging method and device are the embodiment of the invention provides, is used to solve existing charging method
Middle raising charging rate can cause battery to there is a problem of larger security risk.
On the one hand, a kind of charging method is the embodiment of the invention provides, including：Battery is charged；The bag that charges
Include the first charging stage and the second charging stage；
First charging stage includes at least two charging subs, right successively in each described charging sub
The battery carries out the first constant-current charge, the second constant-current charge, constant-current discharge and the 3rd constant-current charge；
In second charging stage, constant-voltage charge is carried out to the battery.
Aspect as described above and any possible implementation, it is further provided a kind of implementation,
First rate of charge is more than the second rate of charge；
First rate of charge is more than the 3rd rate of charge；
First rate of charge is more than discharge-rate；
Wherein, first rate of charge is the rate of charge that first constant-current charge is carried out to the battery, described
Second rate of charge is the rate of charge that second constant-current charge is carried out to the battery, and the 3rd rate of charge is to institute
Stating battery carries out the rate of charge of the 3rd constant-current charge；The discharge-rate is to carry out the constant-current discharge to the battery
Discharge-rate.
Aspect as described above and any possible implementation, it is further provided a kind of implementation,
First duration is more than the second duration；
First duration is more than the 3rd duration；
First duration is more than the 4th duration；
Wherein, described first when a length of duration that first constant-current charge is carried out to the battery, second duration
It is the duration that second constant-current charge is carried out to the battery, it is a length of when the described 3rd that the 3rd perseverance is carried out to the battery
The duration of current charge；A length of duration that constant-current discharge is carried out to battery when the described 4th.
Aspect as described above and any possible implementation, it is further provided a kind of implementation, described first fills
The scope of electric multiplying power includes [0.7C, 3C].
Aspect as described above and any possible implementation, it is further provided a kind of implementation, described second fills
The scope of electric multiplying power includes [0.05C, 1.5C].
Aspect as described above and any possible implementation, it is further provided a kind of implementation, the described 3rd fills
The scope of electric multiplying power includes [0.01C, 1.5C].
Aspect as described above and any possible implementation, it is further provided a kind of implementation, when described first
Scope long includes [0.1s, 30s].
Aspect as described above and any possible implementation, it is further provided a kind of implementation, when described second
Scope long includes [0.01s, 1s].
Aspect as described above and any possible implementation, it is further provided a kind of implementation, when the described 3rd
Scope long includes [0.01s, 5s].
A technical scheme in above-mentioned technical proposal has the advantages that：
In the embodiment of the present invention, when being charged to battery, the charging includes the first charging stage and the second charging stage,
Wherein, the first charging stage include at least two charging subs, in each charging sub, the is all carried out to battery successively
One constant-current charge, the second constant-current charge, constant-current discharge and the 3rd constant-current charge, then, in the second charging stage, enter to battery
Row constant-voltage charge.During charging method provided in an embodiment of the present invention, the first constant-current charge in the first charging stage,
Battery is charged using high current so that charging rate is highly improved；Then, carried out using a less electric current
Constant-current charge is to alleviate the polarization phenomena that high current is caused, so that anode potential is unlikely to quick reduction；Afterwards, using constant current
The mode of electric discharge, further eliminates concentration polarization, in this way, polarization phenomena of the battery in whole charging process can be reduced；It
Afterwards, it is contemplated that the circulation of charging process and discharge process is carried out, the solid electrolyte interface film of electrode surface may be destroyed
(solid electrolyte interface, SEI), therefore, battery carried out after above-mentioned discharge process terminates one it is small
The constant-current charge of electric current, the SEI films of electrode surface are repaired with this, reduce destruction of the charging process to electrode material.Therefore, originally
The charging method that inventive embodiments are provided while the charging current of battery is improved, can alleviate the polarization phenomena of battery, and
So that the anode potential of battery is gradually lifted, it is to avoid battery occurs analysis lithium phenomenon, eliminate due to caused by raising charging rate
The security risk that battery is present, that is, technical scheme provided in an embodiment of the present invention is improved in solving existing charging method
Charging rate can cause battery to there is a problem of larger security risk.
On the other hand, a kind of charging device is the embodiment of the invention provides, described device is applied to charge battery
Method, the charging include the first charging stage and the second charging stage；
Described device includes charhing unit and discharge cell；
First charging stage includes at least two charging subs, described to fill in each described charging sub
Electric unit is used to carry out the battery the first constant-current charge, and the charhing unit is additionally operable to terminate in first constant-current charge
The second constant-current charge is carried out to the battery afterwards, the discharge cell is used for after second constant-current charge terminates to the electricity
Pond carries out constant-current discharge, and the charhing unit is additionally operable to carry out the 3rd constant current to the battery after the constant-current discharge terminates to fill
Electricity；
In second charging stage, the charhing unit is additionally operable to carry out constant-voltage charge to the battery.
A technical scheme in above-mentioned technical proposal has the advantages that：
In the embodiment of the present invention, when being charged to battery, the charging includes the first charging stage and the second charging stage,
The charging device includes charhing unit and discharge cell；Wherein, the first charging stage include at least two charging subs, every
In individual charging sub, charhing unit is used to carry out battery the first constant-current charge, and charhing unit is used in the first constant-current charge
The second constant-current charge is carried out after end to battery, discharge cell is put for carrying out constant current to battery after the second constant-current charge terminates
Electricity, charhing unit is used to carry out the 3rd constant-current charge to battery after constant-current discharge terminates；In the second charging stage, charge single
Unit is additionally operable to carry out constant-voltage charge to battery.Charging device provided in an embodiment of the present invention, in the first charging stage first
During constant-current charge, battery can be charged using high current so that charging rate is highly improved；Then,
Using a less electric current carries out constant-current charge to alleviate the polarization phenomena that high current is caused, so that anode potential is unlikely to
It is quick to reduce；Afterwards, by the way of constant-current discharge, concentration polarization is further eliminated, in this way, battery can be reduced entirely filling
Polarization phenomena in electric process；Afterwards, it is contemplated that the circulation of charging process and discharge process is carried out, electrode surface may be destroyed
SEI films, therefore, a constant-current charge for low current is carried out to battery after above-mentioned discharge process terminates, electricity is repaired with this
The SEI films on pole surface, reduce destruction of the charging process to electrode material.Therefore, charging device provided in an embodiment of the present invention
The polarization phenomena of battery while the charging current of battery is improved, can be alleviated, and cause that the anode potential of battery is gradually carried
Rise, it is to avoid battery occurs analysis lithium phenomenon, eliminate due to the security risk that battery caused by raising charging rate is present, that is,
Technical scheme provided in an embodiment of the present invention solve improve in existing charging method charging rate can cause battery exist compared with
The problem of big security risk.
【Brief description of the drawings】
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this area
For those of ordinary skill, without having to pay creative labor, can also obtain other attached according to these accompanying drawings
Figure.
Fig. 1 is the charging method charging process schematic diagram that the embodiment of the present invention is provided；
Fig. 2 is the current curve contrast schematic diagram of the charging method that is provided of the embodiment of the present invention and existing charging method；
Fig. 3 is the voltage curve contrast schematic diagram of the charging method that is provided of the embodiment of the present invention and existing charging method；
Fig. 4 is that the charging method that the embodiment of the present invention is provided is illustrated with the charging rate curve comparison of existing charging method
Figure；
Fig. 5 is the functional block diagram of the charging device that the embodiment of the present invention is provided.
【Specific embodiment】
In order to be better understood from technical scheme, the embodiment of the present invention is retouched in detail below in conjunction with the accompanying drawings
State.
It will be appreciated that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
Its embodiment, belongs to the scope of protection of the invention.
The term for using in embodiments of the present invention is the purpose only merely for description specific embodiment, and is not intended to be limiting
The present invention." one kind ", " described " and " being somebody's turn to do " of singulative used in the embodiment of the present invention and appended claims
It is also intended to include most forms, unless context clearly shows that other implications.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, represent
There may be three kinds of relations, for example, A and/or B, can represent：Individualism A, while there is A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent forward-backward correlation pair as if a kind of relation of "or".
Depending on linguistic context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determining " or " in response to detection ".Similarly, depending on linguistic context, phrase " if it is determined that " or " if detection
(condition or event of statement) " can be construed to " when it is determined that when " or " in response to determine " or " when the detection (condition of statement
Or event) when " or " in response to detection (condition or event of statement) ".
Embodiment one
In order to solve the above-mentioned problems in the prior art, the embodiment of the present invention provides a kind of charging method, the method
Including：Battery is charged.
Charging includes the first charging stage and the second charging stage；
First charging stage included at least two charging subs, in each charging sub, battery was carried out successively
First constant-current charge, the second constant-current charge, constant-current discharge and the 3rd constant-current charge；
In the second charging stage, constant-voltage charge is carried out to battery.
It should be noted that in the embodiment of the present invention, when being charged to battery, using the charging side of the first charging stage
Method, until reaching the blanking voltage of battery, the charging method for starting with for the second charging stage charges to battery；To electricity
The second charging stage that pond is charged, constant-voltage charge is carried out to battery until reaching the cut-off multiplying power of battery, charging process knot
Beam.
Specifically, Fig. 1 is refer to, the charging process schematic diagram of its charging method provided by the embodiment of the present invention.Such as
Shown in Fig. 1, the AB stages represent the first charging stage charged to battery, and the BC stages represent second charged to battery
Charging stage；Wherein, the AD stages are to represent a charging subcycle, and the AB stages can include at least two AD stages, i.e., first
Charging stage AB can include at least two charging subcycle AD.
Specifically, as shown in figure 1, in each charging subcycle AD, including successively：The AE stages, the EF stages, the FG stages,
The GD stages.Specifically, in the AE stages, the first constant-current charge is carried out to battery；In the EF stages, the second constant current is carried out to battery and is filled
Electricity, in the FG stages, constant-current discharge is carried out to battery, in the GD stages, the 3rd constant-current charge is carried out to battery.It is understood that
The rate of charge in AE stages is different from the rate of charge in EF stages.
It should be noted that in the embodiment of the present invention, as shown in figure 1, in each AD stage according to AE stages, EF ranks
Section, FG stages, the sequencing in GD stages are charged for battery.Specifically, in each AD circulations, can be adopted in the AE stages
It is that battery charges with larger rate of charge, and continues longer time, so, it is possible to lift charging rate；In the EF stages, lead to
A less rate of charge is crossed for battery is charged, to alleviate the polarization phenomena that the large current charge stage causes, including Europe
Nurse polarization phenomena, concentration polarization phenomenon etc., to cause that the anode potential of battery is unlikely to quick reduction；Afterwards, in the FG stages, adopt
Constant-current discharge is carried out to battery with less discharge-rate, be so, it is possible further to suppress the high current in the AE stages and filled
The larger concentration polarization phenomenon that electricity is produced, while, it is ensured that the anode potential of battery is unlikely to rapid decrease, reduces battery and occurs
Analyse the risk of lithium；Now, because the circulation in AF stages and FG stages is carried out, the change repeatedly of rate of charge, now, can be to charging
During the SEI films that are formed in electrode surface produce destruction, and then electrode material can be destroyed, the life-span and performance to battery produce
Irreversible influence, therefore, it can carry out constant-current charge to battery using less rate of charge in the GD stages, by low current
Charging alleviate and repair the SEI films of electrode material surface, to reduce the destruction to electrode material.
Specifically, as shown in figure 1, in the second charging stage charged for battery, i.e. BC stages, perseverance is carried out to battery
Pressure is charged, and now, rate of charge is gradually reduced, until the cut-off multiplying power of near battery, charging process terminates.
It should be noted that in the embodiment of the present invention, the first rate of charge is more than the second rate of charge；First rate of charge
More than the 3rd rate of charge；First rate of charge is more than discharge-rate；Wherein, the first rate of charge is that the first perseverance is carried out to battery
The rate of charge of current charge, the second rate of charge is the rate of charge that the second constant-current charge is carried out to battery, the 3rd rate of charge
It is the rate of charge that the 3rd constant-current charge is carried out to battery；Discharge-rate is the discharge-rate that constant-current discharge is carried out to battery.
For example, as shown in figure 1, the rate of charge I in AE stages1More than the rate of charge I in EF stages2；AE stages fill
Electric multiplying power I1More than the rate of charge I in GD stages3；The rate of charge I in AE stages1More than the discharge-rate I in FG stages4。
It should be noted that in the embodiment of the present invention, for the second rate of charge, the 3rd rate of charge and discharge-rate it
Between magnitude relationship be not particularly limited, in specific practice process, can be preset according to actual needs.
During a concrete implementation, the first rate of charge can be preset in the range of [0.7C, 3C].
During a concrete implementation, the second rate of charge can carry out pre- in the range of [0.05C, 1.5C]
If.
During a concrete implementation, the 3rd rate of charge can carry out pre- in the range of [0.01C, 1.5C]
If.
During a concrete implementation, discharge-rate can be preset in the range of [0.01C, 0.2C].
Specifically, in the embodiment of the present invention, the first duration is more than the second duration；First duration is more than the 3rd duration；First
Duration is more than the 4th duration；Wherein, first when a length of duration that the first constant-current charge is carried out to battery, it is a length of to battery when second
The duration of the second constant-current charge is carried out, a length of duration that the 3rd constant-current charge is carried out to battery when the 3rd；It is a length of to electricity when the 4th
Pond carries out the duration of constant-current discharge.
For example, as shown in figure 1, the charging duration T in AE stages1More than the charging duration T in EF stages2；AE stages fill
Electric duration T1More than the charging duration T in GD stages3；The charging duration T in AE stages1More than the electric discharge duration T in FG stages4。
It should be noted that in the embodiment of the present invention, for the size between the second duration, the 3rd duration and the 4th duration
Relation is not particularly limited, and in specific practice process, can be preset according to actual needs.
During a concrete implementation, the first duration can be preset in the range of [0.1s, 30s].
During a concrete implementation, the second duration can be preset in the range of [0.01s, 1s].
During a concrete implementation, the 3rd duration can be preset in the range of [0.01s, 5s].
During a concrete implementation, the 4th duration can be preset in the range of [0.01s, 5s].
Specifically, in the embodiment of the present invention, in the second charging stage charged to battery, the stage is to reach when starting
To the blanking voltage of battery, then, constant-voltage charge is carried out to battery with the blanking voltage until reaching the cut-off multiplying power of battery, filled
Electric process terminates.It is understood that the blanking voltage of battery and cut-off multiplying power are relevant with battery, the blanking voltage of different batteries
Difference, the cut-off multiplying power of different batteries is different, and the embodiment of the present invention is not particularly limited to this.
It should be noted that battery involved in the embodiment of the present invention can be included but is not limited to：Lithium ion battery,
Lithium metal battery, lead-acid battery, nickel separation cell, Ni-MH battery, lithium-sulfur cell, lithium-air battery or sodium-ion battery.Can be with
Understand, the example above is only used to illustrate the type of the battery involved by the embodiment of the present invention, is not used to limit the application.
For example, during a concrete implementation, the general scope at [3.0V, 5.0V] of blanking voltage of above-mentioned battery
Interior variation, the cut-off multiplying power of above-mentioned battery is general to be changed in the range of [0.01C, 0.5C], in actual implementation process, root
Preset according to actual conditions.
Involved battery can apply in the embodiment of the present invention：Mobile phone, notebook computer, panel computer, music are broadcast
Put device, bluetooth earphone, portable power source, other portable handheld devices, electric tool, unmanned plane or electric motor car.It is appreciated that
, the example above is only used to illustrate the application scenarios of the battery involved by the embodiment of the present invention, is not used to limit the application.
It should be noted that the executive agent of charging method provided in an embodiment of the present invention can be charging device, this is held
Position where row main body can include but is not limited to：Battery charger, battery adapter, battery control circuit or integrated core
Piece.
It should be noted that charging method provided in an embodiment of the present invention, can be in the temperature range of [0 DEG C, 60 DEG C]
Battery is charged, and disclosure satisfy that the demand and the demand to high-temperature charging charged to low temperature in actual charging process.
The embodiment of the present invention provides charging method, each charging sub in the first charging stage, successively to battery
The first constant-current charge, the second constant-current charge, constant-current discharge and the 3rd constant-current charge process are carried out, compared to " positive pulse charges+bears
This common pulse charging manner of pulsed discharge ", the embodiment of the present invention is second permanent by what is carried out after the first constant-current charge
Current charge process, constant-current discharge process and the 3rd constant-current charge process, reduce charging speed of the negative pulse discharge process to battery
The adverse effect of degree, also, the polarization phenomena caused by the second constant-current charge process mitigation high current, so that anode potential
It is unlikely to quick reduction, the purpose of analysis lithium phenomenon is reduced so as to reach, electrode surface is repaired by the 3rd constant-current charge process
SEI films, so as to reduce destruction of the large current charge to electrode material, extend the cycle life of battery core.Therefore, the present invention is implemented
The charging modes that example is provided, can weaken the polarization phenomena that high current is caused, so that, before other security risks are not brought
Put, it is possible to use bigger current versus cell is charged, improve the charging rate of battery, and reduce to electrode material
Destruction, extend the cycle life of battery.
The technical scheme of the embodiment of the present invention has the advantages that：
In the embodiment of the present invention, when being charged to battery, the charging includes the first charging stage and the second charging stage,
Wherein, the first charging stage include at least two charging subs, in each charging sub, the is all carried out to battery successively
One constant-current charge, the second constant-current charge, constant-current discharge and the 3rd constant-current charge, then, in the second charging stage, enter to battery
Row constant-voltage charge.During charging method provided in an embodiment of the present invention, the first constant-current charge in the first charging stage,
Battery is charged using high current so that charging rate is highly improved；Then, carried out using a less electric current
Constant-current charge is to alleviate the polarization phenomena that high current is caused, so that anode potential is unlikely to quick reduction；Afterwards, using constant current
The mode of electric discharge, further eliminates concentration polarization, in this way, polarization phenomena of the battery in whole charging process can be reduced；It
Afterwards, it is contemplated that the circulation of charging process and discharge process is carried out, the SEI films of electrode surface may be destroyed, therefore, above-mentioned
Discharge process carries out a constant-current charge for low current to battery after terminating, and the SEI films of electrode surface are repaired with this, reduces this and fills
Destruction of the electric process to electrode material.Therefore, charging method provided in an embodiment of the present invention can improve the charging electricity of battery
While stream, alleviate the polarization phenomena of battery, and cause that the anode potential of battery is gradually lifted, it is to avoid battery occurs analysis lithium and shows
As eliminating due to the security risk that battery caused by raising charging rate is present, that is, technology provided in an embodiment of the present invention
Raising charging rate can cause battery to there is larger security risk during scheme solves the problems, such as existing charging method.
Embodiment two
Based on the charging method that above-described embodiment one is provided, the embodiment of the present invention provides several tools to above-mentioned charging method
The implementation of body.Hereinafter, it is specifically described by taking the charging process shown in Fig. 1 as an example.
Specifically, the battery used in the embodiment of the present invention is by negative electrode, anode, along with barrier film, electrolyte and packaging
Shell, is made up of techniques such as assembling, chemical conversion and ageings.Wherein, the negative electrode of battery by 96.7%LiCoO2 (as cathode activity thing
Matter)+1.7%PVDF (as binding agent)+1.6%SP (as conductive agent) mixing composition, the anode of battery is by 98% artificial stone
Black (as anode active material)+1.0%SBR (as binding agent)+1.0%CMC (as thickener) mixing is constituted, and barrier film is
PP/PE/PP composite membranes, electrolyte is added and added by organic solvent (30%EC+30%PC+40%DEC) and 1mol/L LiPF6
Plus agent (0.5%VC, 5%FEC, 4%VEC) composition.
At room temperature (25 DEG C), expiring for the battery fills charging capacity for 4110mAh (i.e. 0.2C), and blanking voltage is 4.4V.
Implementation one
At 25 DEG C, battery is charged according to method for charging batteries of the present invention, charging process is as shown in Fig. 2 this fills
Electric process is comprised the following steps：
1) with constant rate of charge I1For 1.2C charges to battery, a length of 9s during charging；
2) with constant rate of charge I2For 0.1C charges to battery, a length of 0.5s during charging；
3) with constant rate of charge I4For 0.2C discharges battery, a length of 0.5s during electric discharge；
4) with constant rate of charge I3For 0.1C charges to battery, a length of 0.5s during charging；
5) repeat step 1)~4), the blanking voltage 4.4V until reaching battery afterwards, battery is read with constant voltage 4.4V
Constant-voltage charge terminates to multiplying power 0.05C, charging is ended.
And existing charging method (prior art one in table 1) is：At 25 DEG C, battery is carried out with rate of charge 0.7C
Then constant-current charge, is charged to battery constant-voltage charge with constant voltage 4.4V to blanking voltage 4.4V to multiplying power 0.05C is ended
Terminate.
Refer to Fig. 2, Fig. 2 is the current curve pair of the charging method that is provided of the embodiment of the present invention and existing charging method
Compare schematic diagram.As shown in Fig. 2 curve 1 is to carry out to battery charging what is obtained in the embodiment of the present invention with above-mentioned implementation
Current versus time curve, curve 2 is battery charge with above-mentioned existing charging method the current versus time curve for obtaining.As schemed
Shown in 2, because the first charging stage is excessively intensive, the black region in Fig. 2 is shown as, and the sketch in Fig. 2 upper right corner is used to table
The curent change of each the charging sub in bright first charging stage.
As shown in Fig. 2 during above-mentioned charging method claimed using the embodiment of the present invention, compared to existing charging side
Method, can largely lift rate of charge, in this way, can cause that the charging rate of battery is improved.
Refer to Fig. 3, Fig. 3 is the voltage curve pair of the charging method that is provided of the embodiment of the present invention and existing charging method
Compare schematic diagram.As shown in figure 3, curve 1 is to carry out to battery charging what is obtained in the embodiment of the present invention with above-mentioned implementation
Voltage-time curve, curve 2 is to carry out resulting voltage charge-time graph to battery with above-mentioned existing charging method.As schemed
Shown in 3, because the first charging stage is excessively intensive, the black region in Fig. 3 is shown as, and the sketch on the right side of Fig. 3 is used to show
The voltage change of each the charging sub in the first charging stage.
As shown in figure 3, charging method provided in an embodiment of the present invention, the voltage of battery can be made through after a while
After high-voltage charge process, it is rapidly decreased in a relatively low voltage range, so so that the voltage of battery will not be located always
In high voltage range, the anode potential of battery does not decline rapidly, alleviates the polarization phenomena of battery, and then, reduce battery
There is the possibility of analysis lithium phenomenon, and reduce due to the security risk that battery analysis lithium is caused, and cause that the life-span of battery is able to
Extension.
Fig. 4 is refer to, Fig. 4 is that the charging method that the embodiment of the present invention is provided is bent with the charging rate of existing charging method
Line contrast schematic diagram.As shown in figure 4, curve 1 is to carry out to battery charging in the embodiment of the present invention with above-mentioned implementation
Charge capacity percentage-the time graph for arriving, curve 2 is battery charge with above-mentioned existing charging method the charging for obtaining
Electricity percentage-time graph.
As shown in figure 4, reaching charge capacity to carry out charging to battery with above-mentioned implementation in the embodiment of the present invention
Time used by 100%, the state for being completely filled with electricity, fast about 16min or so, hence it is evident that put forward are reached compared to existing charging modes
Charging rate high.
Implementation two
At 0 DEG C, battery is charged according to method of charging lithium-ion battery of the present invention, specifically include following steps：
1) with constant rate of charge I1For 0.2C charges to battery, a length of 0.9s during charging；
2) with constant rate of charge I2For 0.05C charges to battery, a length of 0.01s during charging；
3) with constant discharge multiplying power I4For 0.02C discharges battery, a length of 0.01s during electric discharge；
4) with constant rate of charge I3For 0.05C charges to battery, a length of 0.01s during charging；
5) repeat step 1)~4), the blanking voltage 4.4V until reaching battery afterwards, battery is read with constant voltage 4.4V
Constant-voltage charge terminates to multiplying power 0.05C, charging is ended.
And existing charging method (prior art two in table 1) is：At 0 DEG C, battery is carried out with rate of charge 0.1C
Then constant-current charge, multiplying power 0.05C is extremely ended with constant voltage 4.4V to blanking voltage 4.4V to battery constant-voltage charge.
Implementation three
At 25 DEG C, battery is charged according to method of charging lithium-ion battery of the present invention, specifically include following steps：
1) with constant rate of charge I1For 3C charges to battery, a length of 0.1s during charging；
2) with constant rate of charge I2For 1.5C charges to battery, a length of 0.2s during charging；
3) with constant discharge multiplying power I4For 0.5C discharges battery, a length of 0.2s during electric discharge；
4) with constant rate of charge I3For 0.7C charges to battery, a length of 0.2s during charging；
5) repeat step 1)~4), the blanking voltage 4.4V until reaching battery afterwards, battery is read with constant voltage 4.4V
Constant-voltage charge terminates to multiplying power 0.05C, charging is ended.
Implementation four
At 25 DEG C, battery is charged according to method of charging lithium-ion battery of the present invention, specifically include following steps：
1) with constant rate of charge I1For 1.2C charges to battery, a length of 0.9s during charging；
2) with constant rate of charge I2For 0.5C charges to battery, a length of 2s during charging；
3) with constant discharge multiplying power I4For 1.5C discharges battery, a length of 0.5s during electric discharge；
4) with constant rate of charge I3For 0.5C charges to battery, a length of 2s during charging；
5) repeat step 1)~4), the blanking voltage 4.4V until reaching battery afterwards, battery is read with constant voltage 4.4V
Constant-voltage charge terminates to multiplying power 0.05C, charging is ended.
Implementation five
At 25 DEG C, battery is charged according to method of charging lithium-ion battery of the present invention, specifically include following steps：
1) with constant rate of charge I1For 2C charges to battery, a length of 0.9s during charging；
2) with constant rate of charge I2For 0.5C charges to battery, a length of 0.05s during charging；
3) with constant discharge multiplying power I4For 0.2C discharges battery, a length of 0.5s during electric discharge；
4) with constant rate of charge I3For 0.5C charges to battery, a length of 0.05s during charging；
5) repeat step 1)~4), the blanking voltage 4.4V until reaching battery afterwards, battery is read with constant voltage 4.4V
Constant-voltage charge terminates to multiplying power 0.01C, charging is ended.
Implementation six
At 25 DEG C, battery is charged according to method of charging lithium-ion battery of the present invention, specifically include following steps：
1) with constant rate of charge I1For 0.8C charges to battery, a length of 30s during charging；
2) with constant rate of charge I2For 0.4C charges to battery, a length of 1s during charging；
3) with constant discharge multiplying power I4For 0.1C discharges battery, a length of 1s during electric discharge；
4) with constant rate of charge I3For 0.2C charges to battery, a length of 1s during charging；
5) repeat step 1)~4), the blanking voltage 4.4V until reaching battery afterwards, battery is read with constant voltage 4.4V
Constant-voltage charge terminates to multiplying power 0.1C, charging is ended.
Implementation seven
At 60 DEG C, battery is charged according to method of charging lithium-ion battery of the present invention, specifically include following steps：
1) with constant rate of charge I1For 1.2C charges to battery, a length of 0.9s during charging；
2) with constant rate of charge I2For 0.05C charges to battery, a length of 0.5s during charging；
3) with constant discharge multiplying power I4For 0.1C discharges battery, a length of 0.5s during electric discharge；
4) with constant rate of charge I3For 0.1C charges to battery, a length of 0.5s during charging；
5) repeat step 1)~4), the blanking voltage 4.4V until reaching battery afterwards, battery is read with constant voltage 4.4V
Constant-voltage charge terminates to multiplying power 0.05C, charging is ended.
Implementation eight
At 25 DEG C, battery is charged according to method of charging lithium-ion battery of the present invention, specifically include following steps：
1) with constant rate of charge I1For 2.5C charges to battery, a length of 20s during charging；
2) with constant rate of charge I2For 1.2C charges to battery, a length of 1s during charging；
3) with constant discharge multiplying power I4For 0.01C discharges battery, a length of 0.3s during electric discharge；
4) with constant rate of charge I3For 0.01C charges to battery, a length of 0.4s during charging；
5) repeat step 1)~4), the blanking voltage 4.4V until reaching battery afterwards, battery is read with constant voltage 4.4V
Constant-voltage charge terminates to multiplying power 0.5C, charging is ended.
And existing charging method (prior art three in table 1) is：At 60 DEG C, battery is carried out with rate of charge 0.7C
Then constant-current charge, multiplying power 0.05C is extremely ended with constant voltage 4.4V to blanking voltage 4.4V to battery constant-voltage charge.
The embodiment of the present invention returns a kind of charging method (four in the prior art in table 1) using existing charging technique, tool
Body, included with the process that big multiplying power charging modes are charged to battery：At 25 DEG C, battery is entered with rate of charge 1.2C
Then row constant-current charge, is filled to battery constant-voltage charge with constant voltage 4.4V to blanking voltage 4.4V to multiplying power 0.05C is ended
Electricity terminates.
Table 1 is refer to, it is charge data table.As shown in table 1, the charge data table includes：It is specific real with above-mentioned eight kinds
Existing mode to battery charge the charge data for obtaining, and the filling of obtaining of to battery charge by existing charging modes
Electric data.Wherein, first three groups charge data is that battery is carried out at different temperature using existing charging modes to charge
The charge data for arriving, the 4th group is that battery is charged at normal temperatures using big multiplying power charging method of the prior art
Charge data, eight groups of charge datas are that charging modes provided in an embodiment of the present invention charge the charging number for obtaining to battery afterwards
According to.
As shown in table 1, charging duration represents the total duration spent by battery is fully charged using corresponding charging method.Its
In, implementation two is the charge data obtained at 0 DEG C, and implementation six is the charge data obtained at 60 DEG C.
As shown in table 1, at 25 DEG C, in the above-mentioned charging method provided in the embodiment of the present invention, with implementation one, in fact
Existing mode three, implementation four, implementation five, implementation six and implementation eight charge to what full electricity was spent to battery
Duration is respectively less than fully charged the spent duration of a pair of batteries of prior art at 25 DEG C.
As shown in table 1, at 0 DEG C, the implementation two in the above-mentioned charging method provided in the embodiment of the present invention is utilized
The implementation spent duration 486.2min fully charged to battery is spent less than prior art is fully charged to battery at 0 DEG C
Duration 723.2min.
As shown in table 1, at 60 DEG C, the implementation six in the above-mentioned charging method provided in the embodiment of the present invention, profit
Spent with the implementation spent duration 104.7min fully charged to battery is fully charged to battery less than 60 DEG C of prior arts
The duration 122.8min for taking.
Therefore, during technical scheme provided in an embodiment of the present invention is compared to the prior art under same temperature, can be significantly
Improve the charging rate of battery.Also, in above-mentioned eight kinds of implementations provided in an embodiment of the present invention, fully charged to battery
During, do not occur to analyse lithium phenomenon.
The charge data table of table 1
Additionally, as shown in table 1, when the big multiplying power charging modes using prior art four, with larger rate of charge 1.5C
When carrying out constant-current constant-voltage charging to battery, to battery it is fully charged required for charging when a length of 106.3min；Implement with the present invention
The implementation one that example is provided is compared, and the two charging duration to battery required for fully charged is suitable.But, in prior art four
Due to using large current charge so that battery occurs analysis lithium phenomenon, so that, can cause that the cycle life of battery fails；Compared to it
Under, although the implementation one in charging method provided in an embodiment of the present invention also using larger multiplying power, such as I1It is 1.2C,
But, during the whole recycling of battery, there is no analysis lithium phenomenon, eliminate causes due to improving charging rate
Battery exist security risk.
The technical scheme of the embodiment of the present invention has the advantages that：
During charging method provided in an embodiment of the present invention, the first constant-current charge in the first charging stage, adopt
Battery is charged with high current so that charging rate is highly improved；Then, perseverance is carried out using a less electric current
Current charge is to alleviate the polarization phenomena that high current is caused, so that anode potential is unlikely to quick reduction；Afterwards, put using constant current
The mode of electricity, further eliminates concentration polarization, in this way, polarization phenomena of the battery in whole charging process can be reduced；Afterwards,
Circulation in view of charging process and discharge process is carried out, and may destroy the SEI films of electrode surface, therefore, put in above-mentioned
Electric process carries out a constant-current charge for low current to battery after terminating, and the SEI films of electrode surface are repaired with this, reduces the charging
Destruction of the process to electrode material.Therefore, charging method provided in an embodiment of the present invention can improve the charging current of battery
While, alleviate the polarization phenomena of battery, and cause that the anode potential of battery is gradually lifted, it is to avoid battery occurs analysis lithium phenomenon,
Eliminate due to the security risk that battery caused by raising charging rate is present, that is, technical side provided in an embodiment of the present invention
Raising charging rate can cause battery to there is larger security risk during case solves the problems, such as existing charging method.
Embodiment three
Based on the charging method that above-described embodiment one is provided, the embodiment of the present invention is further given realizes above method reality
Apply the device embodiment of each step and method in example.
Fig. 5 is refer to, the functional block diagram of its charging device provided by the embodiment of the present invention.As shown in figure 5, the dress
The method for being applied to be charged to battery is put, charging includes the first charging stage and the second charging stage；
The device includes charhing unit 51 and discharge cell 52；
First charging stage included at least two charging subs, and in each charging sub, charhing unit 51 is used for
The first constant-current charge is carried out to battery, charhing unit 51 is additionally operable to carry out the second constant current to battery after the first constant-current charge terminates
Charge, discharge cell 52 is used to carry out battery after the second constant-current charge terminates constant-current discharge, and charhing unit 51 is additionally operable to
Constant-current discharge carries out the 3rd constant-current charge after terminating to battery；
In the second charging stage, charhing unit 51 is additionally operable to carry out constant-voltage charge to battery.
Specifically, in the embodiment of the present invention, the first rate of charge is more than the second rate of charge；First rate of charge is more than the
Three rate of charge；First rate of charge is more than discharge-rate；
Wherein, the first rate of charge is the rate of charge that the first constant-current charge is carried out to battery, and the second rate of charge is right
Battery carries out the rate of charge of the 3rd constant-current charge, and the 3rd rate of charge is the charging times that the 6th constant-current charge is carried out to battery
Rate；Discharge-rate is the discharge-rate that constant-current discharge is carried out to battery.
Specifically, in the embodiment of the present invention, the first duration is more than the second duration；First duration is more than the 3rd duration；First
Duration is more than the 4th duration；
Wherein, first when a length of duration that the first constant-current charge is carried out to battery, it is a length of when second that the 3rd is carried out to battery
The duration of constant-current charge, a length of duration that the 6th constant-current charge is carried out to battery when the 3rd；It is a length of when the 4th that perseverance is carried out to battery
Banish the duration of electricity.
During a concrete implementation, the scope of the first rate of charge includes [0.7C, 3C].
During a concrete implementation, the scope of the second rate of charge includes [0.05C, 1.5C].
During a concrete implementation, the scope of the 3rd rate of charge includes [0.01C, 1.5C].
During another concrete implementation, the scope of the first duration includes [0.1s, 30s]
During a concrete implementation, the scope of the second duration includes [0.01s, 1s].
During a concrete implementation, the scope of the 3rd duration includes [0.01s, 5s].
It should be noted that the position where the embodiment of the present invention provides charging device can include but is not limited to：Battery
Charger, battery adapter, battery control circuit or integrated chip.
Because each unit in the present embodiment is able to carry out the method shown in embodiment one, what the present embodiment was not described in detail
Part, refers to the related description to embodiment one.
The technical scheme of the embodiment of the present invention has the advantages that：
In the embodiment of the present invention, when being charged to battery, the charging includes the first charging stage and the second charging stage,
Charging device includes charhing unit and discharge cell；Wherein, the first charging stage include at least two charging subs, at each
In charging sub, charhing unit is used to carry out battery the first constant-current charge, and charhing unit is used in the first constant-current charge knot
The second constant-current charge is carried out after beam to battery, discharge cell is put for carrying out constant current to battery after the second constant-current charge terminates
Electricity, charhing unit is used to carry out the 3rd constant-current charge to battery after constant-current discharge terminates；In the second charging stage, charge single
Unit is additionally operable to carry out constant-voltage charge to battery.Charging device provided in an embodiment of the present invention, in the first charging stage first
During constant-current charge, battery is charged using high current so that charging rate is highly improved；Then, use
One less electric current carries out constant-current charge to alleviate the polarization phenomena that high current is caused, so that anode potential is unlikely to quick
Reduce；Afterwards, by the way of constant-current discharge, concentration polarization is further eliminated, in this way, battery can be reduced being charged entirely
Polarization phenomena in journey；Afterwards, it is contemplated that the circulation of charging process and discharge process is carried out, electrode surface may be destroyed
SEI films, therefore, a constant-current charge for low current is carried out to battery after above-mentioned discharge process terminates, electrode is repaired with this
The SEI films on surface, reduce destruction of the charging process to electrode material.Therefore, charging device energy provided in an embodiment of the present invention
It is enough to alleviate the polarization phenomena of battery while the charging current of battery is improved, and cause that the anode potential of battery is gradually lifted,
Avoid battery that analysis lithium phenomenon occurs, eliminate due to the security risk that battery caused by raising charging rate is present, that is, this hair
The technical scheme that bright embodiment is provided solves and improve in existing charging method charging rate that battery can be caused to exist is larger
The problem of security risk.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
In several embodiments provided by the present invention, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Divide, only a kind of division of logic function there can be other dividing mode when actually realizing, for example, multiple units or group
Part can be combined or be desirably integrated into another system, or some features can be ignored, or not performed.It is another, it is shown
Or the coupling each other that discusses or direct-coupling or communication connection can be by some interfaces, device or unit it is indirect
Coupling is communicated to connect, and can be electrical, mechanical or other forms.
The unit that is illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be according to the actual needs selected to realize the mesh of this embodiment scheme
's.
In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit can both be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can store and be deposited in an embodied on computer readable
In storage media.Above-mentioned SFU software functional unit storage is in a storage medium, including some instructions are used to so that a computer
Device (can be personal computer, server, or network equipment etc.) or processor (Processor) perform the present invention each
The part steps of embodiment methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. it is various
Can be with the medium of store program codes.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (10)
1. a kind of charging method, it is characterised in that methods described includes：Battery is charged；The charging includes that first fills
Electric stage and the second charging stage；
First charging stage includes at least two charging subs, in each described charging sub, successively to described
Battery carries out the first constant-current charge, the second constant-current charge, constant-current discharge and the 3rd constant-current charge；
In second charging stage, constant-voltage charge is carried out to the battery.
2. method according to claim 1, it is characterised in that
First rate of charge is more than the second rate of charge；
First rate of charge is more than the 3rd rate of charge；
First rate of charge is more than discharge-rate；
Wherein, first rate of charge is the rate of charge that first constant-current charge is carried out to the battery, described second
Rate of charge is the rate of charge that second constant-current charge is carried out to the battery, and the 3rd rate of charge is to the electricity
Pond carries out the rate of charge of the 3rd constant-current charge；The discharge-rate is to carry out the constant-current discharge to the battery to put
Electric multiplying power.
3. method according to claim 1, it is characterised in that
First duration is more than the second duration；
First duration is more than the 3rd duration；
First duration is more than the 4th duration；
Wherein, described first when a length of duration that first constant-current charge is carried out to the battery, it is a length of right when described second
The battery carries out the duration of second constant-current charge, a length of when the described 3rd the 3rd constant current is carried out to the battery to fill
The duration of electricity；A length of duration that constant-current discharge is carried out to battery when the described 4th.
4. method according to claim 2, it is characterised in that the scope of first rate of charge includes [0.7C, 3C].
5. method according to claim 2, it is characterised in that the scope of second rate of charge include [0.05C,
1.5C]。
6. method according to claim 2, it is characterised in that the scope of the 3rd rate of charge include [0.01C,
1.5C]。
7. method according to claim 3, it is characterised in that the scope of first duration includes [0.1s, 30s].
8. method according to claim 3, it is characterised in that the scope of second duration includes [0.01s, 1s].
9. method according to claim 3, it is characterised in that the scope of the 3rd duration includes [0.01s, 5s].
10. a kind of charging device, it is characterised in that described device is applied to the method charged to battery, the charging bag
Include the first charging stage and the second charging stage；
Described device includes charhing unit and discharge cell；
First charging stage includes at least two charging subs, in each described charging sub, the list that charges
For carrying out the first constant-current charge to the battery, the charhing unit is additionally operable to right after first constant-current charge terminates for unit
The battery carries out the second constant-current charge, and the discharge cell is used to enter the battery after second constant-current charge terminates
Row constant-current discharge, the charhing unit is additionally operable to carry out the 3rd constant-current charge to the battery after the constant-current discharge terminates；
In second charging stage, the charhing unit is additionally operable to carry out constant-voltage charge to the battery.
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Application publication date: 20170531 |