CN107171380A - Charging method and device - Google Patents
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- CN107171380A CN107171380A CN201710335967.9A CN201710335967A CN107171380A CN 107171380 A CN107171380 A CN 107171380A CN 201710335967 A CN201710335967 A CN 201710335967A CN 107171380 A CN107171380 A CN 107171380A
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- H02J7/0077—
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of charging method and device, this method includes the charged state of battery in detection present period, judge whether the charged state reaches threshold value, if reaching, then obtaining present period is used for the first charging current value of charging and the battery parameter for reflecting battery build-in attribute, the second charging current value that subsequent period is used to charge to the battery is calculated according to first charging current value and the battery parameter, first charging current value is adjusted to second charging current value to and the battery is carried out by second charging current value charging of subsequent period.The present invention while quick charge is realized, can effectively extend the service life of battery.
Description
Technical field
The present invention relates to battery boosting technology field, in particular to a kind of charging method and device.
Background technology
The quick charge of battery is the important topic during electric automobile research and development, studies and finds through inventor,
The existing charging equipment with quick charge or equalizaing charge function or commercial charger are typically by the charging being previously set
Current versus cell is charged, so as to cause not adjusting charging current according to actual charge condition in charging process
Whole, in addition, in order to avoid there is overcharge, charging current set in advance is generally less than normal so that the charging interval is still longer.Remove
Outside this, because the charging current in charging process does not possess adaptive ability, easily occur overcharging electrical phenomena and shortening electric power storage
The life-span in pond.Therefore, how while quick charge is realized, and battery life is not influenceed, as those skilled in the art urgently
Technical problem to be solved.
The content of the invention
In view of this, the present invention provides a kind of charging method and device, by the side that time-dependent current is used in charging process
Formula charges to battery, can effectively solve the problem that above mentioned problem, can realize the quick charge to battery, the battery longevity is not interfered with again
Life.
Present pre-ferred embodiments provide a kind of charging method, and methods described includes：
Detect the charged state of battery in present period；
Judge whether the charged state reaches threshold value, if reaching, obtain the first charging that present period is used to charge
Current value and the battery parameter for reflecting battery build-in attribute；
Calculating subsequent period according to first charging current value and the battery parameter is used for what the battery was charged
Second charging current value；
First charging current value is adjusted to second charging current value and by second charging current value pair
The battery carries out the charging of subsequent period.
Further, methods described also includes：
Judge whether the linearity of the OCV-SOC curves of the battery is less than preset value；
It is described according to first charging current when the linearity of the OCV-SOC curves of the battery is less than preset value
The step of value and battery parameter calculating subsequent period are used for the second charging current value charged to the battery includes：
Under conditions of dQ/dV is constant, calculate described current according to the battery parameter and first charging current value
Current changing rate in period charging process；
Second charging current value is calculated according to the current changing rate and first charging current value.
Further, it is described according to described first when the linearity of the OCV-SOC curves of the battery is more than preset value
The step of charging current value and the battery parameter calculate the second charging current value charged for subsequent period includes：
Calculated according to first charging current value and predetermined current adjustment index and obtain second charging current value.
Further, the charged state includes the charge capacity or charging interval step-length of present period.
Further, the charging interval step-length is not constant.
Present pre-ferred embodiments provide a kind of charging device, and the charging device includes：
Detection module, the charged state for detecting battery in present period；
Judge module, for judging whether the charged state reaches threshold value, if reaching, obtaining present period is used to fill
First charging current value of electricity and the battery parameter for reflecting battery build-in attribute；
Computing module, is used for institute for calculating subsequent period according to first charging current value and the battery parameter
State the second charging current value of battery charging；
Adjusting module, for by first charging current value adjust to second charging current value and by this second
Charging current value carries out the charging of subsequent period to the battery.
Further, when the linearity of the OCV-SOC curves of the battery is less than preset value, the computing module bag
Include：
Judging unit, for judging whether the linearity of OCV-SOC curves of the battery is less than preset value；
First computing unit, when the linearity for the OCV-SOC curves when the battery is less than preset value, in dQ/dV
Under conditions of constant, calculated according to the battery parameter and first charging current value in the present period charging process
Current changing rate；
Second computing unit, fills for calculating described second according to the current changing rate and first charging current value
Electric current value.
Further, the computing module also includes：
3rd computing unit, when the linearity for the OCV-SOC curves when the battery is less than preset value, according to described
First charging current value and predetermined current adjustment index, which are calculated, obtains second charging current value.
Further, the charged state includes the charge capacity or charging interval step-length of present period.
Further, the charging interval step-length is not constant.
Compared with prior art, charging method provided in an embodiment of the present invention and device, it is permanent based on dQ/dV in charging process
Under conditions of fixed, battery is charged by the way of time-dependent current, the quick charge to battery can be realized, be avoided that occurred again
Charging phenomenon influences the life-span of battery.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore is not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is a kind of application scenarios schematic diagram of application charging device provided in an embodiment of the present invention.
Fig. 2 is the schematic flow sheet of charging method provided in an embodiment of the present invention.
Fig. 3 is the sub-process schematic diagram of the step S106 shown in Fig. 2.
Fig. 4 is the frame structure schematic diagram of charging device provided in an embodiment of the present invention.
Fig. 5 is the frame structure schematic diagram of the computing module shown in Fig. 4.
Icon：10- terminal devices；100- charging devices；102- detection modules；104- judge modules；106- computing modules；
1060- judging units；The computing units of 1062- first；The computing units of 1064- second；The computing units of 1066- the 3rd；108- is adjusted
Module；200- memories；300- storage controls；400- processors.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.The present invention implementation being generally described and illustrated herein in the accompanying drawings
The component of example can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.
As shown in figure 1, being a kind of application scenarios schematic diagram of application charging device 100 provided in an embodiment of the present invention.Its
In, terminal device 10 can be charged by the charging device 100, and the terminal device 10 may be, but not limited to, intelligence
Mobile phone, electric car, intelligent appliance, charging pile etc..
Alternatively, the terminal device 10 includes charging device 100, memory 200, storage control 300 and processing
Device 400.Wherein, the memory 200, storage control 300, each element of processor 400 are directly or indirectly electric each other
Property connection, to realize the transmission or interaction of data.For example, passing through one or more communication bus or signal wire between these elements
Realize and be electrically connected with.The charging device 100 includes at least one can be stored in the memory in the form of software or firmware
In 200 or the software function module that is solidificated in the operating system of the terminal device 10.The processor 400 is in the storage
The memory 200 is accessed under the control of controller 300, for performing the executable module stored in the memory 200,
Such as software function module and computer program included by the charging device 100.
It is appreciated that the structure shown in Fig. 1 is only signal, the terminal device 10 may also include more more than shown in Fig. 1
Either less component or with the configuration different from shown in Fig. 1.Each component shown in Fig. 1 can use hardware, software
Or its combination is realized.
Further, Fig. 2 is please referred to, the embodiment of the present invention, which is provided, a kind of can be applied to the charging device 100
Charging method, the idiographic flow shown in Fig. 2 will be described in detail below.It should be noted that, charging of the present invention
Method is not using Fig. 2 and particular order as described below as limitation.It should be appreciated that its middle part of charging method of the present invention
Order step by step can be exchanged with each other according to actual needs, or part steps therein can also be omitted or deleted.
The charged state of battery in step S102, detection present period.
In the present embodiment, during being charged to the battery, according to the difference of charging current, entirely charged
Journey includes multiple charge periods, wherein, the present period refers to the continuous time section in current charging process, and should
Charging current value in period is identical.
Further, the present embodiment is by detecting that charged state of the battery in a certain period determines the need for tune
Whole charging current value, wherein, the charged state can be charge capacity or charging interval step-length in present period, specifically
Ground, the present embodiment is without limitation.
Step S104, judges whether the charged state reaches threshold value, if reaching, and obtaining present period is used for what is charged
First charging current value and the battery parameter for reflecting battery build-in attribute.
Wherein, during the charged state detected in step S102 judges, if the charged state is to fill
Power consumption, then judge whether the charge capacity in present period reaches threshold value；If the charged state is charging interval step-length,
Judge whether the charging duration being in the preceding period reaches preset value.It should be noted that the threshold value can according to the charge capacity or
The charging interval step-length actual conditions carry out flexible design, and the present embodiment is without limitation.
Further, when the charged state reaches the threshold value, it is necessary to further obtain first in present period
Charging current value and battery parameter, for calculating the second charging current value needed in subsequent period charging process.Wherein, exist
In the present embodiment, the battery parameter includes open-circuit voltage OCV, the SOC for reflecting battery current electric quantity situation and battery holds
Measure Capacity.
Step S106, calculating subsequent period according to first charging current value and the battery parameter is used for the electricity
Second charging current value of pond charging.
Specifically, the first charging current value and battery parameter of present period can effectively reflect present period charging process
The actual conditions of middle battery, the second charging current value for needing to use in subsequent period is calculated further according to the actual conditions, can
Realize in charging process and the adaptivity of charging current is adjusted, and cause charging current remains at battery acceptable
At the critical point of current value, it is to avoid overcharge the generation of electrical phenomena.It should be noted that first charging current value and described second fills
Electric current value is only used for distinguishing the charging current value that different charge periods are used, size without characterizing charging current value etc..
During actual implementation, because the OCV-SOC curves of battery can accurately reflect out the plateau potential of the battery.Therefore,
In the present embodiment, it is necessary to determine the second used charging current according to the linearity situation of the OCV-SOC curves of battery
Calculation.It should be understood that in the present embodiment, in whole charging process, no matter which kind of mode to calculate the second charging electricity using
Flow valuve, should be carried out under conditions of dQ/dV is constant.Specifically, as shown in figure 3, will be carried out below to the idiographic flow shown in Fig. 3
Elaborate.
Step S1060, judges whether the linearity of the OCV-SOC curves of battery is less than preset value, if being less than, holds successively
Row step S1062 and step S1064, conversely, then performing step S1066.
In the present embodiment, the preset value is flexibly set according to actual conditions, is not limited herein.
Step S1062, under conditions of dQ/dV is constant, according to the battery parameter and the first charging current value meter
Calculate the current changing rate in the present period charging process.
In the present embodiment, when the linearity of the OCV-SOC curves of the battery is less than preset value, then firstly the need of basis
The battery parameter and the first charging current value calculating current rate of change got, detailed process is as follows.
When actually implementing, it need to ensure that dQ/dV is constant by adjusting the size of charging current, specifically, it is assumed that current
The electricity Q that period is filled with battery can be expressed as：
Wherein, t is the time, and i is the first charging current value, and Q then has to be filled with electricity to the electricity Q derivations in formula (1)：
DQ/dt=i (t) (2)
Further, when the polarizing voltage in battery reaches stabilization, the voltage V at battery two ends is represented by：
V=OCV+i (t) * R (3)
Wherein, OCV is open-circuit voltage, and R is ohmic internal resistance and polarization resistance sum, then asks for derivatives of the OCV to the time,
Then have：
DOCV/dt=[(dOCV/dSOC)/Capacity] * (dQ/dt) (4)
Wherein, z=(dOCV/dSOC)/Capacity is made, then, z can be used for the build-in attribute of reflection battery, Jin Eryou：
DV/dt=z*i (t)+i'(t) * R (5)
Convolution (3) and formula (5), further can obtain dQ/dV, and dQ/dV can be expressed as：
DQ/dV=(dQ/dt)/(dV/dt)=i (t)/[z*i (t)+i'(t) * R] (6)
In order that it is constant to obtain dQ/dV, if dQ/dV=C, wherein C is constant, then has
C=i (t)/[z*i (t)+i'(t) * R] (7) and then obtain current changing rate：
I'(t)=α * i (t) wherein,
Step S1064, second charging current is calculated according to the current changing rate and first charging current value
Value.
In the present embodiment, the current changing rate is obtained according to formula (8), second charging current value is asked for, it should be appreciated that
During actual implementation, if every the size of certain charging interval step-size change charging current, the current changing rate passes through difference
The form of formula is divided to be expressed as：
There can be the expression formula of second charging current value to be in conjunction with formula (8) and formula (9)：
ik+1=(1+ α * Δ t) * ik (10)
If it should be noted that in the battery status deterministic process, using the charge capacity as criterion, i.e., every one
Fixed charge capacity changes the size of a charging current value, then, the Δ t in formula (9) and formula (10) is not then constant, and need
The charging duration Δ t in present period is calculated according to the first charging current value of present period, and then obtains described second
Charging current value.
Step S1066, obtains described second and fills according to first charging current value and the calculating of predetermined current adjustment index
Electric current value.
In the present embodiment, when the linearity of the OCV-SOC curves of the battery is more than preset value, then it is believed that z=
(dOCV/dSOC)/Capacity is constant, then under conditions of dQ/dV is constant, second charging current value can be represented
For：
I (t)=i0*eα*t (11)
When actually implementing, formula (11) can be rewritten as by difference form according to formula (10), in order to implement, detailed process exists
This is repeated no more.
Step S108, first charging current value is adjusted to second charging current value and second charged by this
Current value carries out the charging of subsequent period to the battery.
In the present embodiment, after second charging current value is obtained, first charging current value is adjusted to second
Charging current value, it should be noted that during adjustment, can be according to actual conditions so that charging current is slowly from the first charging
Current value transits to second charging current value, causes the situation of battery damage to be sent out to avoid electric current moment from converting amplitude
It is raw.
Further, Fig. 4 is please referred to, the embodiment of the present invention also provides a kind of charging device 100, the charging device
100 include detection module 102, judge module 104, computing module 106 and adjusting module 108.
The detection module 102, the charged state for detecting battery in present period.
In the present embodiment, the step S102 in Fig. 2 is performed by the detection module 102, and detailed process refer to step
S102, will not be repeated here.
The judge module 104, for judging whether the charged state reaches threshold value, if reaching, when obtaining current
Section is used for the first charging current value charged and the battery parameter for reflecting battery build-in attribute.
In the present embodiment, the step S104 in Fig. 2 is performed by the judge module 104, and detailed process refer to step
S104, will not be repeated here.
The computing module 106, for calculating subsequent period according to first charging current value and the battery parameter
For the second charging current value charged to the battery.
In the present embodiment, the step S106 in Fig. 2 is performed by the computing module 106, and detailed process refer to step
S106, will not be repeated here.During actual implementation, counted as shown in figure 3, the computing module 106 includes judging unit 1060, first
Calculate unit 1062, the second computing unit 1064 and the 3rd computing unit 1066.
Wherein, the judging unit 1060, for judging it is pre- whether the linearity of OCV-SOC curves of the battery is less than
If value.
In the present embodiment, the step S1060 in Fig. 3 is performed by the judging unit 1060, and detailed process refer to step
S1060, will not be repeated here.
First computing unit 1062, when the linearity for the OCV-SOC curves when the battery is less than preset value,
Under conditions of dQ/dV is constant, the present period is calculated according to the battery parameter and first charging current value and charged
During current changing rate.
In the present embodiment, the step S1062 in Fig. 3 is performed by first computing unit 1062, and detailed process refer to
Step S1062, will not be repeated here.
Second computing unit 1064, for calculating institute according to the current changing rate and first charging current value
State the second charging current value.
In the present embodiment, the step S108 in Fig. 3 is performed by second computing unit 1064, and detailed process refer to step
Rapid S1064, will not be repeated here.
3rd computing unit 1066, when the linearity for the OCV-SOC curves when the battery is less than preset value,
Calculated according to first charging current value and predetermined current adjustment index and obtain second charging current value.
In the present embodiment, the step S1066 in Fig. 3 is performed by the 3rd computing unit 1066, and detailed process refer to
Step S1066, will not be repeated here.
The adjusting module 108, for adjusting to second charging current value and leading to first charging current value
Cross the charging that second charging current value carries out subsequent period to the battery.
In the present embodiment, the step S108 in Fig. 2 is performed by the adjusting module 108, and detailed process refer to step
S108, will not be repeated here.
In summary, the present invention is provided charging method and device, under conditions of dQ/dV is constant, according to charging process
The actual conditions of middle battery adjust the size of charging current, can be in the case where realizing quick charge, it is to avoid overcharge electrical phenomena
Generation, effectively improve the cycle life of battery.
In the description of the invention, term " setting ", " connected ", " connection " should be interpreted broadly, for example, it may be fixed
Connect or be detachably connected, or be integrally connected；Can be mechanical connection or electrical connection；Can be direct
It is connected, can also be indirectly connected to by intermediary, can be the connection of two element internals.For the ordinary skill of this area
For personnel, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.In addition, term " first,
2nd, the it is third be only used for distinguishing description, and it is not intended that simply or implying relative importance.
In several embodiments that the embodiment of the present invention is provided, it should be understood that disclosed apparatus and method, also may be used
To realize by other means.Apparatus and method embodiment described above is only schematical, for example, the stream in accompanying drawing
Journey figure and block diagram show that the device of the predetermined number embodiment according to the present invention, method and computer program product may be real
Existing architectural framework, function and operation.At this point, each square frame in flow chart or block diagram can represent module, a journey
A part for sequence section or code.A part for the module, program segment or code is used to realize comprising one or predetermined number
Defined logic function.
It should also be noted that in some implementations as replacement, the function of being marked in square frame can also be with difference
The order marked in accompanying drawing occurs.For example, two continuous square frames can essentially be performed substantially in parallel, they are sometimes
It can also perform in the opposite order, this is depending on involved function.It is also noted that in block diagram and/or flow chart
The combination of each square frame and the square frame in block diagram and/or flow chart, can be with function as defined in performing or action it is special
Hardware based system is realized, or can be realized with the combination of specialized hardware and computer instruction.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of charging method, it is characterised in that methods described includes：
Detect the charged state of battery in present period；
Judge whether the charged state reaches threshold value, if reaching, obtain the first charging current that present period is used to charge
Value and the battery parameter for reflecting battery build-in attribute；
Subsequent period is used to charge to the battery second is calculated according to first charging current value and the battery parameter
Charging current value；
First charging current value is adjusted to second charging current value and by second charging current value to described
Battery carries out the charging of subsequent period.
2. charging method according to claim 1, it is characterised in that methods described also includes：
Judge whether the linearity of the OCV-SOC curves of the battery is less than preset value；
When the linearity of the OCV-SOC curves of the battery is less than preset value, it is described according to first charging current value and
The step of battery parameter calculating subsequent period is used for the second charging current value charged to the battery includes：
Under conditions of dQ/dV is constant, the present period is calculated according to the battery parameter and first charging current value
Current changing rate in charging process；
Second charging current value is calculated according to the current changing rate and first charging current value.
3. charging method according to claim 2, it is characterised in that when the linearity of the OCV-SOC curves of the battery
It is described to calculate and charged for subsequent period according to first charging current value and the battery parameter during more than preset value
The second charging current value the step of include：
Calculated according to first charging current value and predetermined current adjustment index and obtain second charging current value.
4. charging method according to claim 1, it is characterised in that the charged state includes the charging electricity of present period
Amount or charging interval step-length.
5. charging method according to claim 4, it is characterised in that the charging interval step-length is not constant.
6. a kind of charging device, it is characterised in that the charging device includes：
Detection module, the charged state for detecting battery in present period；
Judge module, for judging whether the charged state reaches threshold value, if reaching, obtaining present period is used for what is charged
First charging current value and the battery parameter for reflecting battery build-in attribute；
Computing module, is used for the electricity for calculating subsequent period according to first charging current value and the battery parameter
Second charging current value of pond charging；
Adjusting module, for adjusting first charging current value to second charging current value and second being charged by this
Current value carries out the charging of subsequent period to the battery.
7. charging device according to claim 6, it is characterised in that when the linearity of the OCV-SOC curves of the battery
During less than preset value, the computing module includes：
Judging unit, for judging whether the linearity of OCV-SOC curves of the battery is less than preset value；
First computing unit, it is constant in dQ/dV when the linearity for the OCV-SOC curves when the battery is less than preset value
Under conditions of, the electric current in the present period charging process is calculated according to the battery parameter and first charging current value
Rate of change；
Second computing unit, for calculating the second charging electricity according to the current changing rate and first charging current value
Flow valuve.
8. charging device according to claim 7, it is characterised in that the computing module also includes：
3rd computing unit, when the linearity for the OCV-SOC curves when the battery is less than preset value, according to described first
Charging current value and predetermined current adjustment index, which are calculated, obtains second charging current value.
9. charging device according to claim 6, it is characterised in that the charged state includes the charging electricity of present period
Amount or charging interval step-length.
10. charging device according to claim 9, it is characterised in that the charging interval step-length is not constant.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107681746A (en) * | 2017-11-14 | 2018-02-09 | 深圳阿凡达智控有限公司 | Charge protection method, device and electronic cigarette |
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