CN105515138B - A kind of battery equalization method, battery balanced controller and battery pack - Google Patents
A kind of battery equalization method, battery balanced controller and battery pack Download PDFInfo
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- CN105515138B CN105515138B CN201610100162.1A CN201610100162A CN105515138B CN 105515138 B CN105515138 B CN 105515138B CN 201610100162 A CN201610100162 A CN 201610100162A CN 105515138 B CN105515138 B CN 105515138B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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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
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a kind of battery equalization method, battery balanced controller and battery pack, this method to include：Obtain the time for balance coefficient of the cell of battery pack；Whether the time for balance coefficient for judging cell is virtual value；When the time for balance coefficient of above-mentioned cell is virtual value, the accumulated running time of above-mentioned cell is obtained, according to the accumulated running time and time for balance coefficient, above-mentioned cell is carried out balanced；When the time for balance coefficient of above-mentioned cell is invalid value, obtain the consistency coefficient between each cell in above-mentioned battery pack, according to the consistency coefficient, above-mentioned cell is carried out balanced, the present invention, battery is charged during battery operation, it is not necessary to additionally increase the battery balanced time, both equilibrium can be carried out in the charging stage, can also be carried out in discharge regime balanced.
Description
Technical field
The present invention relates to cell art, in particular to a kind of battery equalization method, battery balanced controller and
Battery pack.
Background technology
At present, it is often that the progress of multiple cells is in series or in parallel, battery pack is formed, is applied on new-energy automobile.
Because the discharge and recharge rate between each cell in battery pack and battery capacity have the problem of inconsistent, therefore cause
Partial monosomy battery, which occurs overcharging or crossed in charge and discharge process, puts phenomenon, influences the life-span of whole battery pack.
In the prior art, usually using passive balanced method come the poor battery of balanced uniformity, passive balancing technique
Electricity unnecessary in cell is exactly dissipated into heat in a manner of resistance, but existing passive balancing technique can only fill
Carried out when electric, and need first to judge whether to need to carry out equilibrium, then carry out equilibrium, so caused time-consuming longer.
The content of the invention
In view of this, the invention provides a kind of battery equalization method, battery balanced controller and battery pack, for solving
Existing balancing technique first judges whether to need to carry out equilibrium, then carries out equilibrium, time-consuming longer, and can only be carried out in charging equal
The problem of weighing apparatus.
In a first aspect, the embodiments of the invention provide a kind of battery equalization method, methods described includes：
Obtain the time for balance coefficient of the cell of battery pack；
Whether the time for balance coefficient for judging the cell is virtual value；
When the time for balance coefficient of the cell is virtual value, when obtaining the accumulative operation of the cell
Between, according to the accumulated running time and the time for balance coefficient, the cell is carried out balanced；
When the time for balance coefficient of the cell is invalid value, obtain in the battery pack between each cell
Consistency coefficient, according to the consistency coefficient, the cell is carried out balanced.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of the first of above-mentioned first aspect, its
In, the time for balance coefficient of the cell for obtaining battery pack, including：
Obtain the total run time of the cell and balanced opening time；
According to the total run time of the cell and the balanced opening time, the equilibrium of the cell is calculated
Time coefficient.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of second of above-mentioned first aspect, its
In, it is described according to the accumulated running time and the time for balance coefficient, the cell is carried out it is balanced, including：
According to the accumulated running time and the time for balance coefficient, when calculating the cell balanced and opening
Between；
Control equalizing circuit corresponding to the cell to open, the cell is carried out balanced；
When the opening time of the equalizing circuit reaching the balanced opening time of the cell, the monomer is controlled
Equalizing circuit corresponding to battery is closed.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of the third of above-mentioned first aspect, its
In, it is described according to the accumulated running time and the time for balance coefficient, after carrying out equilibrium to the cell, also wrap
Include：
Obtain the consistency coefficient between each cell in the battery pack；
Judge whether the consistency coefficient between each cell is more than or equal to preset value；
If the consistency coefficient between each cell is more than or equal to preset value, when removing described balanced
Between coefficient；
If the consistency coefficient between each cell is less than preset value, the time for balance coefficient is stored.
With reference in a first aspect, the embodiments of the invention provide the possible implementation of the 4th of above-mentioned first aspect kind, its
In, it is described according to the consistency coefficient, the cell is carried out it is balanced, including：
Judge whether the consistency coefficient between each cell is less than preset value；
If the consistency coefficient between each cell is less than preset value, the cell is carried out equal
Weighing apparatus, and reacquire the time for balance coefficient of the cell.
Second aspect, the embodiments of the invention provide a kind of battery balanced controller, including：
Acquisition module, the time for balance coefficient of the cell for obtaining battery pack；
Judge module, for judging whether the time for balance coefficient of the cell is virtual value；
First balance module, for when the time for balance coefficient of the cell is virtual value, obtaining the monomer
The accumulated running time of battery, according to the accumulated running time and the time for balance coefficient, the cell is carried out
It is balanced；
Second balance module, for when the time for balance coefficient of the cell is invalid value, obtaining the battery
Consistency coefficient in group between each cell, according to the consistency coefficient, the cell is carried out balanced.
With reference to second aspect, the embodiments of the invention provide the possible implementation of the first of above-mentioned second aspect, its
In, the acquisition module includes：
Acquiring unit, for the total run time for obtaining the cell and balanced opening time；
First computing unit, for the total run time according to the cell and the balanced opening time, calculate
The time for balance coefficient of the cell.
With reference to second aspect, the embodiments of the invention provide the possible implementation of second of above-mentioned second aspect, its
In, first balance module includes：
Second computing unit, for according to the accumulated running time and the time for balance coefficient, calculating the monomer
The balanced opening time of battery；
Control unit, for controlling equalizing circuit corresponding to the cell to open, the cell is carried out equal
Weighing apparatus；It is additionally operable to, when the opening time of the equalizing circuit reaching the balanced opening time of the cell, controls the list
Equalizing circuit corresponding to body battery is closed.
With reference to second aspect, the embodiments of the invention provide the possible implementation of the third of above-mentioned second aspect, its
In, second balance module includes：
Judging unit, for judging whether the consistency coefficient between each cell is less than preset value；
Balanced unit, if being less than preset value for the consistency coefficient between each cell, to the list
Body battery carries out equilibrium, and reacquires the time for balance coefficient of the cell.
The third aspect, the embodiments of the invention provide a kind of battery pack, including：Multiple cells, multiple equalizing circuits,
With the battery balanced controller described in EEPROM EEPROM and above-mentioned second aspect；
Equalizing circuit corresponds with cell；
Equalizing circuit distinguishes corresponding cell connection, the battery balanced controller respectively with the EEPROM
And the multiple equalizing circuit connection；
The EEPROM is used for accumulated running time and the time for balance coefficient for storing each cell；
The battery balanced controller is used to control equalizing circuit to carry out equilibrium to corresponding cell.
Battery equalization method, battery balanced controller and battery pack provided by the invention are right during battery operation
Battery is charged, it is not necessary to is additionally increased the battery balanced time, both can be carried out equilibrium in the charging stage, and can also discharge
Stage carries out balanced.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be 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 shows a kind of flow chart for battery equalization method that the embodiment of the present invention 1 provides；
Fig. 2 shows a kind of structural representation for battery balanced controller that the embodiment of the present invention 2 provides；
Fig. 3 shows a kind of structural representation for battery pack that the embodiment of the present invention 3 provides；
Fig. 4 shows a kind of circuit diagram for battery pack that the embodiment of the present invention 3 provides.
Fig. 4 description of reference numerals is as follows：
R, resistance；S, switch；310, cell；320, equalizing circuit.
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.Generally
The component for the embodiment of the present invention being described and illustrated herein in the accompanying drawings can be configured to arrange and design with a variety of.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
, can only when carrying out balanced using the passive balanced method battery poor to uniformity in view of in the prior art
Carried out in charging, and need first to judge whether to need to carry out equilibrium, then carry out equilibrium, so caused time-consuming longer.It is based on
This, the embodiments of the invention provide a kind of battery equalization method, battery balanced controller and battery pack.Enter below by embodiment
Row description.
Embodiment 1
The embodiments of the invention provide a kind of battery equalization method.By multiple cells electricity in series or in parallel formed
Pond group, because the discharge and recharge rate between each cell and battery capacity have differences, it can so cause partial monosomy electric
The phenomenon that pond occurs overcharging or put excessively, the life-span of whole battery pack is influenceed, therefore, it is necessary to above-mentioned battery pack is carried out balanced.
The embodiment of the present invention carries out balanced during battery operation to battery, it is not necessary to additionally increases the battery balanced time, both may be used
It is balanced to be carried out in the charging stage, it can also be carried out in discharge regime balanced.
The executive agent of battery equalization method provided in an embodiment of the present invention is battery balanced controller, the battery balanced control
Device processed can be MCU (Micro Control Unit, microcontroller), in EEPROM (Electrically Erasable
Programmable Read-Only Memory, band EEPROM) in store each monomer in battery pack
The parameter such as the time for balance coefficient of battery and accumulated running time, above-mentioned battery balanced controller, which can be read in EEPROM, to be deposited
The above-mentioned parameter of storage, and the equalizing circuit according to corresponding to above-mentioned parameter controls each cell is turned on or off, to above-mentioned
Each cell in battery pack carries out balanced.
As shown in figure 1, battery equalization method provided in an embodiment of the present invention, including step S110~S140, it is specific as follows：
S110, obtain the time for balance coefficient of the cell of battery pack.
Wherein, above-mentioned battery pack is formed by multiple cells are in series or in parallel, battery balanced controller difference
Obtain the time for balance coefficient of each cell in above-mentioned battery pack.
As one embodiment, the time for balance coefficient of the cell of battery pack is obtained, is comprised the following steps：
Obtain the total run time of above-mentioned cell and balanced opening time；
According to the total run time of above-mentioned cell and balanced opening time, the time for balance of above-mentioned cell is calculated
Coefficient.
Wherein, because above-mentioned battery pack is formed by multiple cells are in series or in parallel, it is therefore desirable in acquisition
State the time for balance coefficient of each cell in battery pack.
In embodiments of the present invention, when above-mentioned battery pack is being run first, it is necessary to record the monomer electricity of above-mentioned battery pack
The total run time t in pond1, and total run time t1The battery pack is referred to every time from upper electricity to this lower electric process, and
When carrying out equilibrium to the cell of the battery pack during above-mentioned battery pack operation, and recording the equilibrium of the cell
Between, the time for balance of the cell is designated as t2, the time for balance coefficient of the cell is designated as p, then can pass through public affairs
Formula p=t2/t1The time for balance coefficient p of the cell is calculated, and time for balance coefficient p is stored in EEPROM, root
According to the above method, the time for balance coefficient of each cell in above-mentioned battery pack can be obtained, and by above-mentioned each cell pair
The time for balance coefficient answered is stored in present EEPROM, when above-mentioned battery pack is upper electric again, is then directly read and is stored in
Time for balance coefficient corresponding to each cell in EEPROM.
S120, whether the time for balance coefficient for judging above-mentioned cell is virtual value, when the equilibrium of above-mentioned cell
When time coefficient is virtual value, then step S130 is performed, when the time for balance coefficient of above-mentioned cell is invalid value, is then held
Row step S140.
Wherein, whether the time for balance coefficient for judging above-mentioned cell is virtual value, then refers to judging monomer electricity
Whether the time for balance coefficient in pond is each cell is conventional in the battery pack time for balance factor v, in battery balanced control
Some conventional time for balance factor vs are store in device processed, if the time for balance coefficient of above-mentioned cell is that these are normal
Time for balance factor v or with the difference of above-mentioned conventional time for balance factor v within a preset range, then judge
It is virtual value for the time for balance coefficient of above-mentioned cell.If the time for balance coefficient of above-mentioned cell be 0 or and
The difference of conventional time for balance factor v within a preset range, is not then judged as the time for balance coefficient of above-mentioned cell
It is invalid value.
If above-mentioned battery pack is to run for the first time, at this moment also without the equilibrium for demarcating each cell in above-mentioned battery pack
Time coefficient, it is the time for balance coefficient for not storing each cell in EEPROM, at this moment, from EEPROM at this moment
The time for balance coefficient of reading is then invalid value, or, the time for balance coefficient of each cell of above-mentioned battery pack does not exist
Stored in EEPROM successfully, at this moment, the time for balance coefficient for the cell that battery balanced controller is read from EEPROM is 0
Or 0xFF, at this moment, the time for balance coefficient of above-mentioned cell is also invalid value.
After battery balanced controller reads time for balance coefficient corresponding to the cell of EEPROM storages, then need to sentence
Whether the time for balance coefficient of disconnected above-mentioned cell is virtual value, if the time for balance coefficient of above-mentioned cell is effective
Value, then step S130 is performed, if the time for balance coefficient of above-mentioned cell is invalid value, perform step S140.
S130, the accumulated running time of above-mentioned cell is obtained, according to above-mentioned accumulated running time and time for balance system
Number, above-mentioned cell is carried out balanced；
Wherein, the accumulated running time of above-mentioned cell refers to the cell from upper electricity to this lower electric process,
Read by battery balanced controller from EEPROM the accumulated running time of the cell, also, what is read is monomer electricity
Accumulated running time when pond last time is upper electric.
It is above-mentioned according to accumulated running time and time for balance coefficient as one embodiment, above-mentioned cell is carried out
Equilibrium, comprise the following steps：
According to above-mentioned accumulated running time and time for balance coefficient, the balanced opening time of above-mentioned cell is calculated；
Control equalizing circuit corresponding to above-mentioned cell to open, above-mentioned cell is carried out balanced；
When the opening time of equalizing circuit reaching the balanced opening time of above-mentioned cell, above-mentioned cell is controlled
Corresponding equalizing circuit is closed.
In embodiments of the present invention, each cell in above-mentioned battery pack corresponds to an equalizing circuit, by battery
It is balanced that balance controller controls equalizing circuit corresponding to above-mentioned cell to carry out the cell.
Battery balanced controller reads the accumulated running time t of upper electricity of above-mentioned cell last time, the list from EEPROM
The time for balance coefficient of body battery is p, and the balanced opening time of the cell is calculated by formula p*t, when calculating the list
After the balanced opening time of body battery, battery balanced controller then controls equalizing circuit corresponding to the cell to open, to this
Cell carries out equilibrium, reaches the above-mentioned monomer being calculated when the opening time of equalizing circuit corresponding to above-mentioned cell
After the balanced opening time of battery, battery balanced controller then controls equalizing circuit corresponding to the cell to close, if on
When stating opening time of equalizing circuit corresponding to cell and being not reaching to the above-mentioned cell being calculated balanced and open
Between, then continue to carry out equilibrium to above-mentioned cell, reach until the opening time of equalizing circuit corresponding to above-mentioned cell
After the balanced opening time of the above-mentioned cell being calculated, then battery balanced controller controls above-mentioned cell corresponding again
Equalizing circuit close.
Wherein, above-mentioned battery balanced controller then controls equalizing circuit corresponding to above-mentioned cell to open, and can pass through
Battery balanced controller sends open command to equalizing circuit corresponding to above-mentioned cell to realize, when above-mentioned cell pair
After the opening time for the equalizing circuit answered reaches the balanced opening time of the above-mentioned cell being calculated, then battery balanced control
Device processed sends out code to equalizing circuit corresponding to the cell, with equalizing circuit corresponding to closing the cell, stops
Only the cell is carried out balanced.
It is above-mentioned simply to describe the process that one of cell is balanced in battery pack, for its in above-mentioned battery pack
Its cell is also just to carry out equilibrium by said process.
Wherein, it is above-mentioned according to accumulated running time and time for balance coefficient, after carrying out equilibrium to above-mentioned cell, go back
Comprise the following steps：
Obtain the consistency coefficient between each cell in above-mentioned battery pack；
Judge whether the consistency coefficient between above-mentioned each cell is more than or equal to preset value；
If the consistency coefficient of above-mentioned each cell is more than or equal to preset value, above-mentioned time for balance system is removed
Number；
If the consistency coefficient of above-mentioned each cell is less than preset value, above-mentioned time for balance coefficient is stored.
Wherein, the uniformity between above-mentioned each cell can pass through the SOC of each cell of above-mentioned battery pack
(state of charge, state-of-charge) value or magnitude of voltage judged, such as, when each monomer of above-mentioned battery pack
When difference between the maximum SOC value of battery and the SOC value of minimum is more than preset difference value, then it is assumed that each list of above-mentioned battery pack
Uniformity between body battery is poor, therefore, it is desirable to carries out equilibrium to the cell of above-mentioned battery pack.
In embodiments of the present invention, consistency coefficient refer in above-mentioned battery pack SOC value corresponding to each cell or
The ratio of person's magnitude of voltage, ideally, the SOC value of each cell or magnitude of voltage should be equal in above-mentioned battery pack
, therefore, the consistency coefficient between each cell of above-mentioned battery pack is 1, still, due to filling between each cell
Discharge rate and battery capacity etc. have differences, and therefore, the consistency coefficient of each cell of above-mentioned battery pack can not possibly be
1, still, the consistency coefficient of each cell of above-mentioned battery pack then illustrates one between above-mentioned each cell closer to 1
Cause property is better, in embodiments of the present invention, can pre-set a numerical value, and this numerical value pre-set is exactly preset value,
The preset value can be 0.9,0.95 or 0.98 etc., and the preset value can be configured according to actual conditions, and the present invention is implemented
Example does not limit the concrete numerical value of above-mentioned preset value, and battery balanced controller can in real time or periodically obtain each in above-mentioned battery pack
Consistency coefficient between cell, and pass through the consistency coefficient between each cell by acquisition and above-mentioned preset value
It is compared, to judge the uniformity in above-mentioned battery pack between each cell.
In embodiments of the present invention, above-mentioned monomer electricity is reached when the opening time of equalizing circuit corresponding to above-mentioned cell
After the balanced opening time in pond, equalizing circuit corresponding to above-mentioned cell is closed, battery balanced controller can obtain respectively afterwards
Consistency coefficient between cell, and judge whether the consistency coefficient between above-mentioned each cell is more than or equal to
Preset value, if the consistency coefficient between above-mentioned each cell is more than or equal to preset value, illustrate above-mentioned each monomer
Uniformity between battery is preferable, and at this moment, each cell of above-mentioned battery pack need not then carry out equilibrium, therefore, it is desirable to
The time for balance coefficient stored in EEPROM is removed, is prevented when above-mentioned battery pack is upper electric again, above-mentioned battery balanced controller
Continue to carry out equilibrium to the cell of the battery pack, preset if the consistency coefficient between above-mentioned each cell is less than
Value, then illustrate that the uniformity between above-mentioned each cell is poor, at this moment, then needs to store corresponding to above-mentioned each cell
Weigh time coefficient, and so, when above-mentioned battery pack is upper electric again, battery balanced controller may proceed to read what is stored in EEPROM
Time for balance coefficient corresponding to above-mentioned each cell and the accumulated running time of the battery pack each cell last time, will be upper
The accumulated running time that time for balance coefficient corresponding to cell is multiplied by cell last time is stated, monomer electricity is calculated
The balanced opening time in pond, and the balanced opening time of each cell in above-mentioned battery pack is calculated according to aforesaid way, and
The equilibrium of corresponding balanced opening time is carried out to each cell of above-mentioned battery pack, until between above-mentioned each cell
The uniformity that is more than or equal between preset value, that is, above-mentioned each cell of consistency coefficient it is preferable when then stop
Weighing apparatus, that is, remove time for balance coefficient corresponding to above-mentioned each cell.
S140, the consistency coefficient between each cell in above-mentioned battery pack is obtained, according to the consistency coefficient, to upper
State cell and carry out equilibrium.
Battery balanced controller can in real time or periodically obtain the uniformity system between each cell in above-mentioned battery pack
Number, and compared with its preset value stored, judge the uniformity between above-mentioned each cell.
Wherein, according to above-mentioned consistency coefficient, equilibrium is carried out to above-mentioned cell, specifically comprised the following steps：
Judge whether the consistency coefficient between above-mentioned each cell is less than preset value；
If the consistency coefficient between above-mentioned each cell is less than preset value, above-mentioned cell is carried out equal
Weighing apparatus, and reacquire the time for balance coefficient of above-mentioned cell.
In embodiments of the present invention, when the consistency coefficient between above-mentioned cell is more than or equal to preset value,
Then illustrate that the uniformity between above-mentioned cell is preferable, then equilibrium need not be carried out to above-mentioned battery pack, if above-mentioned monomer
Consistency coefficient between battery is less than above-mentioned preset value, then illustrates that the uniformity between above-mentioned cell is poor, at this moment, then
Battery balanced controller can control equalizing circuit corresponding to above-mentioned cell to open, and carry out equilibrium to above-mentioned cell, together
When, after equalizing circuit corresponding to above-mentioned cell is opened, it is also necessary to the time of equalizing circuit unlatching is recorded, when above-mentioned monomer
When battery meets equalizing circuit closedown condition, then equalizing circuit corresponding to above-mentioned cell is closed, and record above-mentioned monomer electricity
Pond operation total time, by the operation of equalizing circuit opening time divided by above-mentioned cell corresponding to above-mentioned cell it is total when
Between, time for balance coefficient corresponding to the cell is calculated, and the time for balance coefficient is stored in EEPROM, when upper
State battery pack it is upper electric again when, battery balanced controller can directly read each cell of above-mentioned battery pack from EEPROM
Corresponding time for balance coefficient, and during operation accumulative according to each cell last time of the time for balance coefficient and the battery pack
Between, equilibrium is carried out to each cell of the battery pack.
Wherein, where above-mentioned equalizing circuit closedown condition then refers to that above-mentioned battery pack stops charging or the battery pack
Electric under application system, if the battery pack is applied on automobile, what the application system where the battery pack referred to is exactly automobile,
And electricity refers to that automobile closes car key under the application system where the battery pack, such as, if above-mentioned battery pack is charging
In the stage, after above-mentioned battery pack is completed to charge, at this moment need that the battery pack is stopped charging, while be also required to close the battery pack
Equalizing circuit corresponding to each cell, if above-mentioned battery pack is in discharge regime, the application system where above-mentioned battery pack
When lower electric, while also to close equalizing circuit corresponding to each cell of the battery pack.
Battery equalization method provided in an embodiment of the present invention, charges during battery operation to battery, is not required to
Additionally to increase the battery balanced time, both can carry out equilibrium in the charging stage, can also be carried out in discharge regime balanced.
Embodiment 2
The embodiments of the invention provide a kind of battery balanced controller.Wherein, the battery balanced controller can be MCU,
The battery balanced controller can read the time for balance coefficient of each cell in the battery pack stored in EEPROM and add up
The parameters such as run time, and the equalizing circuit according to corresponding to above-mentioned parameter controls each cell is turned on or off, to upper
Each cell stated in battery pack carries out equilibrium.The battery balanced controller is used for the battery for performing the offer of above-described embodiment 1
Equalization methods.
As shown in Fig. 2 battery balanced controller provided in an embodiment of the present invention includes：Acquisition module 210, judge module
220th, the first balance module 230 and the second balance module 240.
Acquisition module 210, the time for balance coefficient of the cell for obtaining battery pack；
Judge module 220, for judging whether the time for balance coefficient of above-mentioned cell is virtual value；
First balance module 230, for when the time for balance coefficient of above-mentioned cell is virtual value, obtaining above-mentioned list
The accumulated running time of body battery, according to above-mentioned accumulated running time and time for balance coefficient, above-mentioned cell is carried out equal
Weighing apparatus；
Second balance module 240, for when the time for balance coefficient of above-mentioned cell is invalid value, obtaining above-mentioned electricity
Consistency coefficient between each cells of Chi Zuzhong, according to the consistency coefficient, above-mentioned cell is carried out balanced.
In embodiments of the present invention, the acquisition module 210 in battery balanced controller can obtain each monomer electricity in battery pack
The time for balance coefficient in pond, and the time for balance coefficient of the cell of acquisition is sent to judge module 220, work as judge module
After 220 receive the time for balance coefficient of the cell of the transmission of acquisition module 210, the time for balance of the cell can be judged
Whether coefficient is virtual value, if the time for balance coefficient of the cell is virtual value, by the first balance module 230 from
The accumulated running time of the cell is obtained in EEPROM, the accumulated running time of the cell is the cell last time
Accumulated running time when upper electric, the cell is referred to from upper electricity to this lower electric period, and according to the cell
Accumulated running time and time for balance coefficient, above-mentioned cell is carried out it is balanced, if during the equilibrium of above-mentioned cell
Between coefficient be invalid value, then the consistency coefficient in above-mentioned battery pack between each cell is obtained by the second balance module 240,
According to the consistency coefficient, above-mentioned cell is carried out balanced.
Wherein, include as one embodiment, above-mentioned acquisition module 210：
Acquiring unit and the first computing unit；
Acquiring unit, for the total run time for obtaining above-mentioned cell and balanced opening time；
First computing unit, for the total run time according to above-mentioned cell and above-mentioned balanced opening time, calculate
The time for balance coefficient of above-mentioned cell.
In embodiments of the present invention, when above-mentioned battery pack is being run first, the acquiring unit in acquisition module 210 can obtain
Take the total run time t of the cell in above-mentioned battery pack1And the time for balance t of the cell2, and by the list of acquisition
The total run time t of body battery1And the time for balance t of the cell2The first computing unit is sent to, when the first calculating is single
Member receives the total run time t of the above-mentioned cell of acquiring unit transmission1And the time for balance t of the cell2Afterwards,
Pass through formula p=t2/t1The time for balance coefficient p of the cell is calculated, and the time for balance coefficient p being calculated is passed
EEPROM is defeated by, is stored by EEPROM, the operation that above-mentioned acquiring unit can obtain each cell in above-mentioned battery pack is total
Time and time for balance, the time for balance coefficient of each cell in above-mentioned battery pack is calculated by the first computing unit, and
The time for balance coefficient of each cell is sent to EEPROM, stored by EEPROM, when above-mentioned battery pack is upper electric again
When, then acquisition module 210, which can be directly read, is stored in EEPROM time for balance coefficient corresponding to each cell.
Wherein, include as one embodiment, above-mentioned first balance module 230：
Second computing unit and control unit；
Second computing unit, for according to above-mentioned accumulated running time and time for balance coefficient, calculating above-mentioned cell
The balanced opening time；
Control unit, for controlling equalizing circuit corresponding to above-mentioned cell to open, above-mentioned cell is carried out equal
Weighing apparatus；It is additionally operable to, when the opening time of above-mentioned equalizing circuit reaching the balanced opening time of above-mentioned cell, controls above-mentioned list
Equalizing circuit corresponding to body battery is closed.
In embodiments of the present invention, above-mentioned second computing unit reads upper electricity of above-mentioned cell last time from EEPROM
Accumulated running time t and time for balance coefficient p, the above-mentioned cell equilibrium opening time is calculated by formula p*t, when second
It is balanced as corresponding to control unit controls the cell after the balanced opening time that computing unit calculates above-mentioned cell
The unlatching of circuit, carries out balanced to above-mentioned cell, reaches above-mentioned the when the balanced opening time corresponding to above-mentioned cell
After the balanced opening time for the cell that two computing units are calculated, control unit is then controlled corresponding to the cell
The circuit that weighs is closed.
Wherein, include as one embodiment, above-mentioned second balance module 240：
Judging unit and balanced unit；
Judging unit, for judging whether the consistency coefficient between above-mentioned each cell is less than preset value；
Balanced unit, if being less than preset value for the consistency coefficient between above-mentioned each cell, to above-mentioned list
Body battery carries out equilibrium, and reacquires the time for balance coefficient of above-mentioned cell.
In embodiments of the present invention, the second balance module 240 can obtain each monomer in above-mentioned battery pack in real time or periodically
Battery with two side terminals coefficient, after the second balance module 240 obtains the consistency coefficient of each cell in above-mentioned battery pack, the
Judging unit in two balance modules 240 can judge whether the consistency coefficient between above-mentioned each cell is less than preset value,
If the consistency coefficient between above-mentioned cell is less than preset value, balanced unit carries out equilibrium to above-mentioned cell,
And during equilibrium, the time for balance coefficient of above-mentioned cell is calculated, and the time for balance coefficient being calculated is deposited
Store up in EEPROM, when above-mentioned battery pack is upper electric again, then directly read the time for balance coefficient of EEPROM storages.
Battery balanced controller provided in an embodiment of the present invention, charges, no during battery operation to battery
Need additionally to increase the battery balanced time, both can carry out equilibrium in the charging stage, can also be carried out in discharge regime balanced.
Embodiment 3
The embodiments of the invention provide a kind of battery pack.As shown in figure 3, the battery pack includes：Multiple cells 310,
The battery balanced controller 340 that multiple equalizing circuits 320, EEPROM 330 and above-described embodiment 2 provide；
Equalizing circuit 320 corresponds with cell 310；
Equalizing circuit 320 is distinguished corresponding cell 310 and connected, above-mentioned battery balanced controller 340 respectively with
Above-mentioned EEPROM 330 and the connection of multiple equalizing circuits；
EEPROM 330 is used for accumulated running time and the time for balance coefficient for storing each cell 310；
Battery balanced controller 340 is used to control equalizing circuit 320 to carry out equilibrium to corresponding cell 310.
Wherein, above-mentioned battery pack includes multiple cells 310, and the plurality of cell 310 can connect, can also be simultaneously
Connection.The number of above-mentioned cell 310 can be configured according to actual conditions, and the present invention does not limit above-mentioned cell
310 specific number.
Above-mentioned battery balanced controller 340 can be MCU.
In embodiments of the present invention, the time for balance of each cell 310 of battery pack is store in EEPROM 330
Coefficient and accumulated running time, when electric in above-mentioned battery pack, battery balanced controller 340, which can be read in EEPROM 330, to be deposited
Storage each cell 310 time for balance coefficient and accumulated running time, the Cumulative Elapsed Time of the cell 310 be
The accumulated running time of the cell 310 when above-mentioned battery pack last time is upper electric, it is that the last time of cell 310 upper electricity arrives lower electricity
This period, when battery balanced controller 340 reads the time for balance system of each cell 310 stored in EEPROM 330
After number and accumulated running time, whether the time for balance coefficient that can judge the cell 310 is virtual value, if the equilibrium
Time coefficient is virtual value, then above-mentioned battery balanced controller 340 can according to the time for balance coefficient of above-mentioned cell 310 and
Accumulated running time, equalizing circuit 320 corresponding to the cell 310 is controlled to carry out equilibrium to the cell 310, if on
The time for balance coefficient for stating cell 310 is invalid value, then above-mentioned battery balanced controller 340 can be obtained in above-mentioned battery pack
Consistency coefficient between each cell 310, and according to the consistency coefficient, control balanced corresponding to the cell 310
Circuit 320 carries out equilibrium to above-mentioned cell 310, and during equilibrium, reacquires each monomer electricity in the battery pack
The time for balance coefficient in pond 310, and the time for balance coefficient is stored in EEPROM 330.
Wherein, above-mentioned equalizing circuit 320 is composed in series by resistance and switch, and when carrying out balanced, above-mentioned resistance will be with this
The unnecessary electricity for the cell that equalizing circuit 320 connects dissipates into heat.
, next will be with 3 monomers in order to introduce the annexation in above-mentioned battery pack between each component in more detail
Exemplified by battery and 3 equalizing circuits, cell, equalizing circuit and EEPROM, battery in above-mentioned battery pack is discussed in detail
Annexation between balancing control circuit, as shown in Figure 4.The embodiment of the present invention simultaneously limits above-mentioned cell and balanced electricity
The specific number on road.
In embodiments of the present invention, equalizing circuit 320 is composed in series by resistance R and switch S, therefore, cell 310
Positive pole connects with switch S, and the negative pole of cell 310 connects with resistance R, and resistance R connects with switch S, so, cell
310th, switch S and resistance R and form a series loop, battery balanced controller 340 connects with switch S, and controlling switch S's is disconnected
Open and close, when the switch s is closed, 320 pairs of equalizing circuit carried out with the cell 310 of the equalizing circuit 320 connection it is balanced,
Unnecessary electricity consumption in the cell 310 that resistance R namely in the equalizing circuit 320 will be connected with the equalizing circuit 320
Heat is dissipated into, when switching S disconnections, equalizing circuit 320, which stops pair cell 310 being connected with the equalizing circuit 320, to be carried out
Weighing apparatus, and battery balanced controller 340 reads the time for balance coefficient and the battery of the battery cell 310 from EEPROM 330
The accumulated running time of monomer 310, and judge whether the time for balance coefficient of the cell 310 is virtual value, if the list
The time for balance coefficient of body battery 310 is virtual value, then according to the time for balance coefficient of the monomer electricity 310 and accumulative operation when
Between, closure and the disconnection that S is switched in equalizing circuit 320 corresponding to the cell 310 are controlled, the cell 310 is carried out
It is balanced；If time for balance coefficient corresponding to above-mentioned cell 310 is invalid value, the battery balanced controller 340 can obtain
The consistency coefficient between each cell 310 in above-mentioned battery pack is taken, and according to the consistency coefficient, controls the cell
Switch S closure and disconnection are carried out balanced to above-mentioned cell 310 in equalizing circuit 320 corresponding to 310, and in the mistake of equilibrium
Cheng Zhong, the time for balance coefficient of each cell 310 in the battery pack is reacquired, and the time for balance coefficient is stored in
In EEPROM 330.
Battery pack provided in an embodiment of the present invention, charges during battery operation to battery, it is not necessary to extra
Increase the battery balanced time, both can carry out equilibrium in the charging stage, can also be carried out in discharge regime balanced.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
- A kind of 1. battery equalization method, it is characterised in that including：Obtain the time for balance coefficient of the cell of battery pack；Whether the time for balance coefficient for judging the cell is virtual value；When the time for balance coefficient of the cell is virtual value, the accumulated running time of the cell, root are obtained According to the accumulated running time and the time for balance coefficient, the cell is carried out balanced；When the time for balance coefficient of the cell is invalid value, one in the battery pack between each cell is obtained Property coefficient is caused, according to the consistency coefficient, equilibrium is carried out to the cell, andJudge whether the consistency coefficient between each cell after equilibrium is more than or equal to preset value, if after equilibrium Consistency coefficient between each cell is less than preset value, then stores the time for balance coefficient；If each list after equilibrium Consistency coefficient between body battery is more than or equal to preset value, then removes the time for balance coefficient.
- 2. according to the method for claim 1, it is characterised in that the time for balance system of the cell for obtaining battery pack Number, including：Obtain the total run time of the cell and balanced opening time；According to the total run time of the cell and the balanced opening time, the time for balance of the cell is calculated Coefficient.
- 3. according to the method for claim 1, it is characterised in that it is described according to the accumulated running time and it is described balanced when Between coefficient, the cell is carried out it is balanced, including：According to the accumulated running time and the time for balance coefficient, the balanced opening time of the cell is calculated；Control equalizing circuit corresponding to the cell to open, the cell is carried out balanced；When the opening time of the equalizing circuit reaching the balanced opening time of the cell, the cell is controlled Corresponding equalizing circuit is closed.
- 4. according to the method for claim 1, it is characterised in that it is described according to the consistency coefficient, to monomer electricity Pond carries out equilibrium, including：Judge whether the consistency coefficient between each cell is less than preset value；If the consistency coefficient between each cell is less than preset value, equilibrium is carried out to the cell, and Reacquire the time for balance coefficient of the cell.
- A kind of 5. battery balanced controller, it is characterised in that including：Acquisition module, the time for balance coefficient of the cell for obtaining battery pack；Judge module, for judging whether the time for balance coefficient of the cell is virtual value；First balance module, for when the time for balance coefficient of the cell is virtual value, obtaining the cell Accumulated running time, according to the accumulated running time and the time for balance coefficient, the cell is carried out balanced；Second balance module, for when the time for balance coefficient of the cell is invalid value, obtaining in the battery pack Consistency coefficient between each cell, according to the consistency coefficient, equilibrium is carried out to the cell, and, sentence Whether the consistency coefficient between each cell after disconnected equilibrium is more than or equal to preset value, if each monomer after equilibrium Consistency coefficient between battery is less than preset value, then stores the time for balance coefficient, if each cell after equilibrium Between consistency coefficient be more than or equal to preset value, then remove the time for balance coefficient.
- 6. controller according to claim 5, it is characterised in that the acquisition module includes：Acquiring unit, for the total run time for obtaining the cell and balanced opening time；First computing unit, for the total run time according to the cell and the balanced opening time, described in calculating The time for balance coefficient of cell.
- 7. controller according to claim 5, it is characterised in that first balance module includes：Second computing unit, for according to the accumulated running time and the time for balance coefficient, calculating the cell The balanced opening time；Control unit, for controlling equalizing circuit corresponding to the cell to open, the cell is carried out balanced；Also For when the opening time of the equalizing circuit reaching the balanced opening time of the cell, controlling the monomer electricity Equalizing circuit corresponding to pond is closed.
- 8. controller according to claim 5, it is characterised in that second balance module includes：Judging unit, for judging whether the consistency coefficient between each cell is less than preset value；Balanced unit, if being less than preset value for the consistency coefficient between each cell, to monomer electricity Pond carries out equilibrium, and reacquires the time for balance coefficient of the cell.
- A kind of 9. battery pack, it is characterised in that including：Multiple cells, multiple equalizing circuits, band electric erazable programmable are read-only Memory EEPROM and the battery balanced controller described in any one of claim 5~8；Equalizing circuit corresponds with cell；Equalizing circuit distinguishes corresponding cell connection, the battery balanced controller respectively with the EEPROM and institute State multiple equalizing circuit connections；The EEPROM is used for accumulated running time and the time for balance coefficient for storing each cell；The battery balanced controller is used to control equalizing circuit to carry out equilibrium to corresponding cell.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361100A (en) * | 2011-10-19 | 2012-02-22 | 奇瑞汽车股份有限公司 | Method for controlling balance of power lithium ion battery |
| CN103812150A (en) * | 2012-11-08 | 2014-05-21 | 国家电网公司 | Cell equalization method and device |
| CN104364116A (en) * | 2012-08-08 | 2015-02-18 | 丰田自动车株式会社 | Electrical storage system and equalizing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5609488B2 (en) * | 2010-09-24 | 2014-10-22 | 住友電気工業株式会社 | Secondary battery charge / discharge device and power storage system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361100A (en) * | 2011-10-19 | 2012-02-22 | 奇瑞汽车股份有限公司 | Method for controlling balance of power lithium ion battery |
| CN104364116A (en) * | 2012-08-08 | 2015-02-18 | 丰田自动车株式会社 | Electrical storage system and equalizing method |
| CN103812150A (en) * | 2012-11-08 | 2014-05-21 | 国家电网公司 | Cell equalization method and device |
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Address after: 230000 Anhui Hefei economic and Technological Development Zone, Xin Xin Road, No. 62 power battery factory Patentee after: Huating (Hefei) Power Technology Co., Ltd. Address before: 230000 No. 26, No. 5, Tsing Luen Road, Hefei economic and Technological Development Zone, Anhui Patentee before: Huating (Hefei) Power Technology Co., Ltd. |