CN104426177B - A kind of balancing control circuit - Google Patents
A kind of balancing control circuit Download PDFInfo
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- CN104426177B CN104426177B CN201310382120.8A CN201310382120A CN104426177B CN 104426177 B CN104426177 B CN 104426177B CN 201310382120 A CN201310382120 A CN 201310382120A CN 104426177 B CN104426177 B CN 104426177B
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- 238000012546 transfer Methods 0.000 claims abstract description 7
- 210000004027 cell Anatomy 0.000 claims description 141
- 230000005611 electricity Effects 0.000 claims description 28
- 239000000178 monomer Substances 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 14
- 238000005303 weighing Methods 0.000 claims description 9
- 238000013500 data storage Methods 0.000 claims description 7
- 210000000352 storage cell Anatomy 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 15
- 230000002950 deficient Effects 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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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- H02J7/0026—
-
- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The embodiment of the present application discloses a kind of balancing control circuit, by arranging multiple Balance route chip, each equilibrium control chip detects the battery status signal of adjacent two cells, and according to this battery status signal, these adjacent two cells is carried out Balance route；Particularly, when the carrying capacity difference of above-mentioned adjacent two cells, its carrying capacity difference is eliminated by electric charge transfer, when the carrying capacity of two cells of arbitrary neighborhood is homogeneous while, the charge and discharge process of each cell in whole battery pack i.e. can reach unanimously, thus reduce and even eliminate the performance difference between cell, extend the service life of battery pack, solve problem of the prior art.
Description
Technical field
The application relates to electric vehicle engineering field, particularly relates to a kind of balancing control circuit.
Background technology
Along with becoming increasingly conspicuous of Environmental and resource issue, the electric automobile with vehicle power as power obtains
Increasingly it is widely applied.Lithium battery has energy density and bulk density is high, operating voltage is high, nothing
The advantages such as memory effect, self discharge low non-environmental-pollution again problem, are the ideal power sources of electric automobile.
But the voltage of single lithium battery is too small, for obtaining higher operating voltage, it is generally required to by lithium battery
Series connection is for using after battery pack.
Cell in the fabrication process, has the dispersiveness of performance, and in use battery
Bag internal environment also has heterogeneity, therefore along with the increase of the time of use, between cell
Performance difference will gradually widen, and if do not take appropriate measures and reduce this species diversity, will result in
Some cell overcharge, some cell overdischarge and overcharge and cross the consequence put, this is not
Only affect the service life of battery, damage battery, but also substantial amounts of heat may be produced and cause battery
Burning or blast.
In prior art, the battery of electric automobile is when concatenation uses, due to battery quality, batch etc.
The damage of self reason and in use individual monomers battery so that battery pack makes for a long time
With rear, the performance difference between cell will gradually widen, and this species diversity can become more in time
Come the biggest, cause when charging to the multiple batteries in this battery pack simultaneously, the cell that capacity is little,
It is always at super-charge super-discharge state, accelerates the decay in its life-span, ultimately result in the overall longevity of battery pack
Life declines therewith.
The most how to realize in battery pack the Balance route between each battery, reduce its performance difference
It is badly in need of solving the technical problem that for those skilled in the art.
Summary of the invention
In view of this, the application purpose is to provide a kind of balancing control circuit, to realize in battery pack
Balance route between each battery, charge and discharge process between each cell in raising battery pack
Uniformity, reduces the performance difference between cell, extends the service life of battery pack.
For achieving the above object, the application provides following technical scheme:
A kind of balancing control circuit, including multiple Balance route chips, each equilibrium control chip is respectively
Two cells adjacent with battery pack connect；
Described Balance route chip includes carrying capacity control unit；
Described carrying capacity control unit includes:
Detect the carrying capacity detector unit of the carrying capacity of described adjacent two cells；
Testing result according to described carrying capacity detector unit, it is judged that described adjacent two cells
The carrying capacity judging unit whether carrying capacity there are differences；And,
When the judged result of described carrying capacity judging unit is for being, control electric charge big by described carrying capacity
Cell to the little cell transfer of described carrying capacity, until described adjacent two cells
The identical electricity branch control unit of carrying capacity；Wherein,
Described carrying capacity judging unit respectively with described carrying capacity detector unit and electricity branch control unit
Connect；Described carrying capacity detector unit connects with described adjacent two cells respectively；Described electricity
Branch control unit connects with described adjacent two cells respectively.
Preferably, described Balance route chip also includes being serially connected with between described adjacent two cells
Voltage changer；
Described electricity branch control unit includes: the carrying capacity according to described adjacent two cells is true
Determine euqalizing current direction, euqalizing current size and the computing unit of time for balance, and according to described institute
State voltage changer described in euqalizing current direction and euqalizing current size adjustment no-load voltage ratio and with described all
The weighing apparatus time is as the performance element of the operating time of described voltage changer.
Preferably, described Balance route chip also includes current control unit；
Described current control unit includes:
Detect the current detecting unit of the current information of described adjacent two cells；
Testing result according to described current detecting unit, it is judged that whether described adjacent two cells
At least the electric current of is beyond the stream judging unit excessively of predetermined current scope；And,
When the judged result of the described judging unit of stream excessively is for being, the monomer electricity to described electric current over range
Pond carries out the over-current protecting unit of overcurrent protection；
Described stream judging unit of crossing is connected with described current detecting unit and over-current protecting unit respectively.
Preferably, described Balance route chip also includes voltage control unit；
Described voltage control unit includes:
Detect the voltage detection unit of the information of voltage of described adjacent two cells；
Testing result according to described voltage detection unit, it is judged that whether described adjacent two cells
At least the voltage of one is beyond the overvoltage/undervoltage judging unit of the voltage range preset；And,
When the judged result of described overvoltage/undervoltage judging unit is for being, the monomer to described voltage over range
Battery carries out the overvoltage/undervoltage protected location of overvoltage/undervoltage protection；
Described overvoltage/undervoltage judging unit connects with described voltage detection unit and overvoltage/undervoltage protected location respectively
Connect.
Preferably, described Balance route chip also includes temperature control unit；
Described temperature control unit includes:
Detect the temperature detecting unit of the temperature information of described adjacent two cells；
Testing result according to described temperature detecting unit, it is judged that whether described adjacent two cells
At least the temperature of owes temperature judging unit beyond the mistake of preset temperature range；And,
When described mistake owes the judged result of temperature judging unit for being, the monomer to described temperature out of range
Battery carried out owing the mistake of temperature protection and owed temperature protected location；
Described mistake owe temperature judging unit respectively with described temperature detecting unit and cross owe temperature protected location connect
Connect.
Preferably, described Balance route chip also includes:
It is connected with described carrying capacity detector unit, deposits storing the data of the carrying capacity of each cell
Storage unit；
It is connected with described carrying capacity detector unit and/or data storage cell, to export each cell
The data outputting unit of carrying capacity；
It is connected with described carrying capacity judging unit, with the judged result at described carrying capacity judging unit is
The alarm unit reported to the police is carried out when being.
Preferably, described balancing control circuit also includes when described battery capacity decays to preset capacity
Time enable the enable unit of described Balance route chip.
Preferably, described balancing control circuit also includes obtaining the electric energy of described cell and by it
Supply the low pressure voltage regulation unit of described Balance route chip；
The input of described low pressure voltage regulation unit is connected with at least one cell, described low pressure voltage stabilizing
The output of unit is connected to described Balance route chip.
Preferably, described low pressure voltage regulation unit includes low-pressure linear voltage-stablizer LDO.
Preferably, described balancing control circuit also includes when the output voltage of described low pressure voltage regulation unit is low
The voltage lockout unit of described Balance route chip is closed in time presetting minimum operating voltage.
From above-mentioned technical scheme it can be seen that the application is by arranging multiple Balance route chip, often
The battery status signal of adjacent two cells of individual Balance route chip detection, and according to this battery shape
State signal carries out Balance route to these adjacent two cells；Particularly, when above-mentioned adjacent two lists
During the carrying capacity difference of body battery, eliminate its carrying capacity difference, when arbitrary neighborhood two by electric charge transfer
The while that the carrying capacity of individual cell being homogeneous, the discharge and recharge of each cell in whole battery pack
Journey i.e. can reach unanimously, thus reduce and even eliminate the performance difference between cell, extends electricity
In the service life of pond group, solve problem of the prior art.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below by right
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that,
Accompanying drawing in describing below is only some embodiments described in the application, skill common for this area
From the point of view of art personnel, on the premise of not paying creative work, it is also possible to obtain it according to these accompanying drawings
His accompanying drawing.
The structured flowchart of the balancing control circuit that Fig. 1 provides for the embodiment of the present application one；
The structural frames of Balance route chip in the balancing control circuit that Fig. 2 provides for the embodiment of the present application two
Figure；
The structural frames of Balance route chip in the balancing control circuit that Fig. 3 provides for the embodiment of the present application three
Figure；
The structured flowchart of the balancing control circuit that Fig. 4 provides for the embodiment of the present application four；
The structured flowchart of the balancing control circuit that Fig. 5 provides for the embodiment of the present application five.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the application scheme, below in conjunction with the application
Accompanying drawing in embodiment, is clearly and completely described the technical scheme in the embodiment of the present application,
Obviously, described embodiment is only some embodiments of the present application rather than whole embodiments.
Based on the embodiment in the application, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, broadly falls into the scope of the application protection.
This application provides a kind of balancing control circuit, equal with realize in battery pack between each battery
Weighing apparatus controls, and in raising battery pack, the uniformity of charge and discharge process between each cell, reduces monomer
Performance difference between battery, extends the service life of battery pack.
Seeing Fig. 1, the balancing control circuit that the present embodiment provides includes that multiple Balance route chip 100(schemes
Illustrate only two) in 1；Balance route chip 100 mainly includes carrying capacity control unit 110.Charged
Amount control unit 110 specifically includes carrying capacity detector unit 111, carrying capacity judging unit 112 and electricity and turns
Move control unit 113.
Carrying capacity judging unit 112 respectively with carrying capacity detector unit 111 and electricity branch control unit
113 connect；Carrying capacity detector unit 111 connects with adjacent two cells respectively；Electricity transfer control
Unit 113 processed connects with above-mentioned adjacent two cells the most respectively.
For ease of describing, in the embodiment of the present application, two phases being connected with same Balance route chip
Adjacent cell is designated as cell A and cell B respectively.
In above-mentioned Balance route chip circuit, each equilibrium control chip 100 is to connected adjacent two
Individual cell carries out Balance route, is illustrated its concrete control course of work/principle below.
Carrying capacity detector unit 111 detects the carrying capacity SOC of cell A and cell B；Charged
Amount judging unit 112 is according to the testing result of carrying capacity detector unit 111, it is judged that the lotus of cell A
Electricity SOCACarrying capacity SOC with cell BBWhether there are differences；When carrying capacity judging unit
The judged result of 112 is for being (i.e. SOCA≠SOCB) time, electricity branch control unit 113 controls electricity
Lotus is shifted to cell little for carrying capacity SOC by cell big for carrying capacity SOC, until two
Identical (the SOC of carrying capacity of cellA=SOCB).
From said structure and operation principle, the embodiment of the present application is by arranging multiple Balance route core
Sheet, each equilibrium control chip detects the battery status signal of adjacent two cells, and according to this
Battery status signal carries out Balance route to these adjacent two cells；Particularly, when above-mentioned adjacent
During the carrying capacity difference of two cells, eliminate its carrying capacity difference, when arbitrarily by electric charge transfer
The while that the carrying capacity of adjacent two cells being homogeneous, filling of each cell in whole battery pack
Discharge process i.e. can reach unanimously, thus reduce and even eliminate the performance difference between cell, prolongs
Grow the service life of battery pack, solve problem of the prior art.
It addition, the embodiment of the present application is after the carrying capacity difference judging adjacent two cells, do not have
Cell big for carrying capacity SOC is carried out discharge process to reduce its carrying capacity SOC, but by it
The most unnecessary electric charge is transferred to the cell that carrying capacity SOC is little, it is to avoid energy content of battery waste,
Achieve the maximization of battery capacity, and extend the service life of battery pack to greatest extent.
Concrete, the mode controlling the transfer of the electric charge between two cells can have multiple, this Shen
Please embodiment two provide a kind of preferred embodiment as shown in Figure 2.
In balancing control circuit shown in Fig. 2, Balance route chip 100 includes carrying capacity control unit 110
With voltage changer 120.Carrying capacity control unit 110 specifically includes carrying capacity detector unit 111, charged
Amount judging unit 112 and electricity branch control unit 113.More specifically, electricity branch control unit 113
Including computing unit 1131 and performance element 1132.
The annexation of above-mentioned unit is: the input of carrying capacity detector unit 111 is electric with monomer respectively
Pond A and cell B connects, and the output of carrying capacity detector unit 111 judges single respectively with carrying capacity
The output of unit 112 and the output of computing unit 1131 connect；The output of carrying capacity detector unit 111
End is connected with the Enable Pin of computing unit 1131；The input of performance element 1132 and computing unit 1131
Output connect, the output of performance element 1132 is connected with the control end of voltage changer 120, electric
Buckling parallel operation 120 1 non-controlling end is connected with cell A, and another non-controlling end is with cell B even
Connect.
The operation principle of above-mentioned balancing control circuit is described below.
When carrying capacity judging unit 112 judges the cell A's that carrying capacity detector unit 111 detects
Carrying capacity SOCACarrying capacity SOC with cell BBTime different, to the Enable Pin of computing unit 1132
Send and enable signal.
After computing unit 1131 receives enable signal, according to the carrying capacity SOC of cell AAWith list
The carrying capacity SOC of body battery BBDetermine euqalizing current direction, euqalizing current size and time for balance；Its
In, euqalizing current direction is to be flowed to, by the cell that carrying capacity is big, the cell that carrying capacity is little；All
The half of the carrying capacity difference that product is two cells of weighing apparatus size of current and time for balance is (i.e.
|SOCA-SOCB|/2).
After performance element 1132 receives the result of calculation of computing unit 1131, start voltage changer 120
And start timing, regulate the no-load voltage ratio of voltage changer 120 so that flow through voltage changer 120 simultaneously
The sense of current, size are respectively above-mentioned euqalizing current direction and euqalizing current size；It is up to when timing
To above-mentioned all with the time after, performance element 1132 controls voltage changer 120 and quits work.
The no-load voltage ratio assuming voltage changer 120 is UA:UB(UARepresent voltage changer 120 and monomer electricity
The voltage of one end that pond A connects, UBOne end that expression voltage changer 120 is connected with cell B
Voltage), if SOCA＞ SOCB, then performance element 1132 regulates the no-load voltage ratio of voltage changer 120
UA:UB> 1, make euqalizing current be flowed to cell B by cell A.And big due to euqalizing current
Little and time for balance influences each other, therefore can determine according to actual equalization request；Such as, if reality is applied
In require nothing more than time for balance less than t0, then time for balance can be set as t(0 ＜ t≤t0), the most all
Weighing apparatus size of current I=| SOCA-SOCB|/(2t)；If actual application requires that time for balance is less than t0And all
Weighing apparatus electric current is less than I0, euqalizing current size can be set as I(0 ＜ I≤I0), corresponding time for balance t '
=|SOCA-SOCB|/(2I)≤t0。
From above-described embodiment, the embodiment of the present application is by controlling the start and stop of voltage changer, and adjusts
Save its no-load voltage ratio, it is achieved that the electric charge between adjacent two cells quantitatively shifts, and not only eliminates two
Carrying capacity difference between individual cell, it is thus also avoided that the energy content of battery is wasted, it is achieved that battery capacity
Maximization, and then make the charge and discharge process of each cell in whole battery pack reach consistent,
Reduce and even eliminate the performance difference between cell, extend the use of battery pack to greatest extent
In the life-span, solve problem of the prior art.
Applicant finds in research process, cell in charge and discharge process it is also possible that electric current,
Voltage or the most high/low phenomenon of temperature, these phenomenons, by cell causes certain infringement, cause
Performance difference between cell, shortens the service life of cell.Therefore, it is necessary to take
Certain measure eliminates above-mentioned phenomenon, to reach more preferable battery balanced control effect.
In view of the foregoing, the embodiment of the present application three provides another kind of balancing control circuit, still includes
Balance route chip.As it is shown on figure 3, this Balance route chip 100 include carrying capacity control unit 110,
Voltage changer 120 and current control unit 130.
Carrying capacity control unit 110 specifically includes carrying capacity detector unit 111, carrying capacity judging unit 112
With electricity branch control unit 113.More specifically, electricity branch control unit 113 includes computing unit
And performance element.In the present embodiment, the connection between each component units of carrying capacity control unit 110 is closed
System and operation principle can refer to mentioned above, do not repeat them here.
Current control unit 130 includes current detecting unit 131, crosses stream judging unit 132 and overcurrent protection
Unit 133.Wherein, cross stream judging unit 132 respectively with current detecting unit 131 and over-current protecting unit
133 connect.
Current detecting unit 131 is connected with cell A and cell B respectively, is used for detecting monomer
The electric current I of battery AAElectric current I with cell BB；Cross stream judging unit 132 according to current detecting unit
The testing result of 131, it is judged that cell A and the cell B the most at least electric current of exceeds
Predetermined current scope；When having served as the judged result flowing judging unit 132 for being, over-current protecting unit 133
The cell of electric current over range is carried out overcurrent protection.Such as, if crossing stream judging unit 132 to judge list
The electric current I of body battery AAExceed predetermined current maximum Imax, then over-current protecting unit 133 is to cell
A carries out overcurrent protection；If crossing stream judging unit 132 to judge the electric current I of cell BBExceed and preset electricity
Stream maximum Imax, then over-current protecting unit 133 carries out overcurrent protection to cell B.The present embodiment
The overcurrent protection mode used is Cycle by Cycle (Cycle by Cycle) current control mode.The present embodiment
Only take safeguard measure when cell electric current is excessive；If it practice, there is application demand, also may be used
Take corresponding safeguard measure when cell electric current is too low, be that electric current recovers normal value.
It addition, the electric current of the cell of current detecting unit 131 collection had both included that cell charged
Charging current in journey, also includes the discharge current in cell discharge process, the most simultaneously to monomer
The charging process of battery and discharge process carry out overcurrent protection.
Referring now still to Fig. 3, in the balancing control circuit that the embodiment of the present application provides, Balance route chip 100
Also include voltage control unit 140.
Concrete, voltage control unit 140 includes voltage detection unit 141, overvoltage/undervoltage judging unit 142
With overvoltage/undervoltage protected location 143.Wherein, overvoltage/undervoltage judging unit 142 respectively with voltage detection unit 141
Connect with overvoltage/undervoltage protected location 143.
Voltage detection unit 141 is connected with cell A and cell B respectively, is used for detecting monomer
The voltage U of battery AAVoltage U with cell BB；Overvoltage/undervoltage judging unit 142 is according to voltage detecting
The testing result of unit 141, it is judged that cell A and the cell B the most at least voltage of one
Beyond the voltage range preset；If it is, the list that overvoltage/undervoltage protected location 143 is to this voltage over range
Body battery carries out overvoltage/undervoltage protection.Such as, if overvoltage/undervoltage judging unit 142 judges the electricity of cell A
Pressure UABeyond predetermined voltage range (specially UALess than preset minimum voltage value Umin, or, UAIt is more than
Predetermined maximum voltage value Umax), then overvoltage/undervoltage protected location 143 carries out overvoltage/undervoltage guarantor to cell A
Protect；Accordingly, if overvoltage/undervoltage judging unit 142 judges the voltage U of cell BBBeyond predeterminated voltage
Scope (specially UBLess than preset minimum voltage value Umin, or, UBMore than predetermined maximum voltage value
Umax), then overvoltage/undervoltage protected location 143 carries out overvoltage/undervoltage protection to cell B.Overvoltage/undervoltage protection
Concrete mode has multiple, and the preferred embodiment of the embodiment of the present application is for stopping electricity branch control unit 113
Control to voltage changer 120, until voltage recovers to predetermined voltage range.
It addition, be pre-anti-overcharge phenomenon, voltage control unit 140 also includes charging modes control unit
144, for testing result according to voltage detection unit 140 in charging process, filling of battery pack is set
Electrically；That is, at the charging initial stage, when voltage that voltage detection unit 140 detects is less, charging side
Formula control unit 144 arranges battery pack and is charged in the high-power string mode of filling, with improve charging rate,
Ensure charge efficiency；In charging latter stage, when voltage that voltage detection unit 140 detects is bigger, charging
Mode control unit 144 arranges battery pack and is charged with small-power the mode of filling, to slow down charging speed
Degree, prevents from overcharging.Therefore, battery pack is controlled two kinds of charging sides by charging modes control unit 144
Switch under formula, it is achieved that charge efficiency and the unification of charge protection.
Referring now still to Fig. 3, in the balancing control circuit that the embodiment of the present application provides, Balance route chip 100
Also include temperature control unit 150.
Concrete, temperature control unit 150 includes temperature detecting unit 151, crosses and owe temperature judging unit 152
Temperature protected location 153 is owed with crossing.Wherein, cross owe temperature judging unit 152 respectively with temperature detecting unit 151
Connect with crossing deficient temperature protected location 153.
Temperature detecting unit 151 is connected with cell A and cell B respectively, is used for detecting monomer
Temperature T of battery AATemperature T with cell BB；Cross and owe temperature judging unit 152 according to temperature detection
The testing result of unit 151, it is judged that cell A and the cell B the most at least temperature of
Beyond preset temperature range；The temperature protected location 153 monomer to this temperature out of range is owed if it is, cross
Battery carried out owing temperature protection so that it is temperature is recovered to preset temperature range.Such as, if crossing and owing temperature
Judging unit 152 judges temperature T of cell AABeyond preset temperature range (specially TAMore than pre-
If maximum temperature Tmax, or, TALess than presetting minimum temperature Tmin), then cross and owe temperature protected location 153
Cell A row is crossed and owes temperature protection；Accordingly, if crossing deficient temperature judging unit 152 to judge cell
Temperature T of BBBeyond preset temperature range (specially TBMore than presetting maximum temperature Tmax, or,
TBLess than presetting minimum temperature Tmin), then cross owe temperature protected location 153 cell B row is crossed owe temperature protect
Protect.The concrete mode crossing deficient temperature protection has multiple, and the embodiment of the present application is preferably as follows mode, works as temperature
During beyond preset temperature range, the most deficient temperature protected location 153 controls voltage changer 120 and quits work,
When temperature is recovered to preset temperature range, cross deficient temperature protected location 153 and restart voltage changer
120。
It should be noted that in actual application, Balance route chip can be provided simultaneously with above-mentioned electric current and control
Unit, voltage control unit and temperature control unit, it is possible to only comprise any one or two kinds therein.
From said structure and operation principle, the embodiment of the present application passes through current control unit to battery
Cell in group carries out overcurrent protection, by voltage control unit, cell is carried out overvoltage/undervoltage
Protection, carried out cell owing temperature protection by temperature control unit, it is to avoid cell goes out
The phenomenon that existing electric current, voltage or temperature are the most high/low, eliminates its impact on cell performance,
Optimize battery balanced control effect to a certain extent, extend service life of cell.Meanwhile,
Control battery pack by charging modes control unit to switch under two kinds of charging modes, it is achieved that charging effect
Rate and the unification of charge protection.
Further, in the balancing control circuit described in above-described embodiment, Balance route chip also can wrap
Include at least one in data storage cell, data outputting unit and alarm unit.
Wherein, data storage cell and above-mentioned carrying capacity detector unit, current detecting unit, voltage inspection
Survey at least one in unit and temperature detecting unit to connect, for storing the state of each cell
Information；This status information includes the testing result of each detector unit being connected with this data storage cell,
Carrying capacity, electric current, voltage or temperature such as cell.
Data outputting unit is for exporting the status information of each cell, and this data outputting unit was both
Can directly be connected with above-mentioned data storage cell, to directly read the monomer of storage in data storage cell
The status information of battery also outputs it；Also can be with detector unit corresponding to status information needing output
Connect, as the carrying capacity of cell only need to be exported, then only data outputting unit is detected with carrying capacity
Unit connects.
Alarm unit judges single with above-mentioned carrying capacity judging unit, excessively stream judging unit, overvoltage/undervoltage respectively
First and cross and owe temperature judging unit, for when the judged result of arbitrary judging unit is for being, carry out accordingly
Warning.Such as, type of alarm can be set as follows: when the judged result of carrying capacity judging unit is yes
Time, carry out buzzing warning；When the judged result of overvoltage/undervoltage judging unit is for being, carry out luminous alarm
Deng.
For reducing power consumption, the embodiment of the present application four provides a kind of balancing control circuit, can be according to battery
The duty of group starts automatically.As shown in Figure 4, this balancing control circuit includes multiple equilibrium control
Coremaking sheet 100 and enable unit 200.When battery pack uses the initial stage, it is not necessary to Balance route, therefore all
Weighing apparatus control chip 100 does not starts, and to reduce power consumption, and only enables unit 200 and detects the electricity of battery pack
Capacity；Along with the use time of battery increases, the capacitance of battery pack gradually decays, when enabling unit
The capacitance fall-off of 200 battery pack detected is to predetermined threshold value (generally battery pack initial capacitance
80%) time, enable unit 200 trigger each Balance route chip 100 so that Balance route chip
100 start battery pack is carried out Balance route.
The balancing control circuit that the present embodiment provides, its operating voltage can be provided by external power supply.For
Reduce balancing control circuit space hold amount, it is simple to encapsulation, the embodiment of the present application five provides one not
Need the balancing control circuit that external power source is powered.As it is shown in figure 5, this balancing control circuit include multiple all
Weighing apparatus control chip 100 and low pressure voltage regulation unit 300.Wherein Balance route chip 100 is to adjacent in battery pack
Two cells carry out Balance route；The input of low pressure voltage regulation unit at least with a cell
Connecting, output is connected with Balance route chip 100, for power taking from cell, and is converted to
The operating voltage of Balance route chip.Visible, the embodiment of the present application five directly takes from controlled battery pack
Electricity, is not required to single external power source, reduces its space hold amount, reduces it to external equipment
Rely on, improve its independence, it is simple to application.
Concrete, above-mentioned low pressure voltage regulation unit can use low-pressure linear voltage-stablizer LDO.
Further, referring now still to Fig. 5, the balancing control circuit that the embodiment of the present application provides also includes voltage
Lock cell 400.Voltage lockout unit 400 respectively with low pressure voltage regulation unit 300 and Balance route chip
100 connect, for detecting the output voltage size of low pressure voltage regulation unit 300, when this output voltage is less than
During minimum operating voltage (the generally 3.2V) of Balance route chip 100, control Balance route chip 100
Enter resting state, stop the Balance route to battery pack, to prevent Balance route chip 100 misoperation.
For device embodiment, owing to it corresponds essentially to embodiment of the method, so relevant part
The part seeing embodiment of the method illustrates.Device embodiment described above is only schematically
, the wherein said unit illustrated as separating component can be or may not be physically separate
, the parts shown as unit can be or may not be physical location, i.e. may be located at one
Individual place, or can also be distributed on multiple NE.Can be selected it according to the actual needs
In some or all of module realize the purpose of the present embodiment scheme.Those of ordinary skill in the art
In the case of not paying creative work, i.e. it is appreciated that and implements.
The above is only the detailed description of the invention of the application, it is noted that for the art
For those of ordinary skill, on the premise of without departing from the application principle, it is also possible to make some improvement
And retouching, these improvements and modifications also should be regarded as the protection domain of the application.
Claims (9)
1. a balancing control circuit, it is characterised in that include multiple Balance route chip, each
Weighing apparatus control chip two cells adjacent with battery pack respectively connect；
Described Balance route chip includes carrying capacity control unit and is serially connected with described adjacent two monomer electricity
Voltage changer between pond；
Described carrying capacity control unit includes:
Detect the carrying capacity detector unit of the carrying capacity of described adjacent two cells；
Testing result according to described carrying capacity detector unit, it is judged that described adjacent two cells
The carrying capacity judging unit whether carrying capacity there are differences；And,
When the judged result of described carrying capacity judging unit is for being, control electric charge big by described carrying capacity
Cell to the little cell transfer of described carrying capacity, until described adjacent two cells
The identical electricity branch control unit of carrying capacity；Wherein,
Described carrying capacity judging unit respectively with described carrying capacity detector unit and electricity branch control unit
Connect；Described carrying capacity detector unit connects with described adjacent two cells respectively；Described electricity
Branch control unit connects with described adjacent two cells respectively；
Described electricity branch control unit includes: the carrying capacity according to described adjacent two cells is true
Determine euqalizing current direction, euqalizing current size and the computing unit of time for balance, and according to described all
Weighing apparatus the sense of current and euqalizing current size adjustment described in voltage changer no-load voltage ratio and with described equilibrium time
Between as the performance element of operating time of described voltage changer.
Balancing control circuit the most according to claim 1, it is characterised in that described Balance route
Chip also includes current control unit；
Described current control unit includes:
Detect the current detecting unit of the current information of described adjacent two cells；
Testing result according to described current detecting unit, it is judged that whether described adjacent two cells
At least the electric current of is beyond the stream judging unit excessively of predetermined current scope；And,
When the judged result of the described judging unit of stream excessively is for being, the monomer electricity to described electric current over range
Pond carries out the over-current protecting unit of overcurrent protection；
Described stream judging unit of crossing is connected with described current detecting unit and over-current protecting unit respectively.
Balancing control circuit the most according to claim 1, it is characterised in that described Balance route
Chip also includes voltage control unit；
Described voltage control unit includes:
Detect the voltage detection unit of the information of voltage of described adjacent two cells；
Testing result according to described voltage detection unit, it is judged that whether described adjacent two cells
At least the voltage of one is beyond the overvoltage/undervoltage judging unit of the voltage range preset；And,
When the judged result of described overvoltage/undervoltage judging unit is for being, the monomer to described voltage over range
Battery carries out the overvoltage/undervoltage protected location of overvoltage/undervoltage protection；
Described overvoltage/undervoltage judging unit connects with described voltage detection unit and overvoltage/undervoltage protected location respectively
Connect.
Balancing control circuit the most according to claim 1, it is characterised in that described Balance route
Chip also includes temperature control unit；
Described temperature control unit includes:
Detect the temperature detecting unit of the temperature information of described adjacent two cells；
Testing result according to described temperature detecting unit, it is judged that whether described adjacent two cells
At least the temperature of owes temperature judging unit beyond the mistake of preset temperature range；And,
When described mistake owes the judged result of temperature judging unit for being, the monomer to described temperature out of range
Battery carried out owing the mistake of temperature protection and owed temperature protected location；
Described mistake owe temperature judging unit respectively with described temperature detecting unit and cross owe temperature protected location connect
Connect.
Balancing control circuit the most according to claim 1, it is characterised in that described Balance route
Chip also includes:
It is connected with described carrying capacity detector unit, deposits storing the data of the carrying capacity of each cell
Storage unit；
It is connected with described carrying capacity detector unit and/or data storage cell, to export each cell
The data outputting unit of carrying capacity；
It is connected with described carrying capacity judging unit, with the judged result at described carrying capacity judging unit is
The alarm unit reported to the police is carried out when being.
Balancing control circuit the most according to claim 1, it is characterised in that also include when described
Battery capacity decays to enable during preset capacity the enable unit of described Balance route chip.
Balancing control circuit the most according to claim 1, it is characterised in that also include obtaining institute
State the electric energy of cell and be supplied to the low pressure voltage regulation unit of described Balance route chip；
The input of described low pressure voltage regulation unit is connected with at least one cell, described low pressure voltage stabilizing
The output of unit is connected to described Balance route chip.
Balancing control circuit the most according to claim 7, it is characterised in that described low pressure voltage stabilizing
Unit includes low-pressure linear voltage-stablizer LDO.
Balancing control circuit the most according to claim 7, it is characterised in that also include when described
The output voltage of low pressure voltage regulation unit closes described Balance route chip less than when presetting minimum operating voltage
Voltage lockout unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310382120.8A CN104426177B (en) | 2013-08-28 | 2013-08-28 | A kind of balancing control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310382120.8A CN104426177B (en) | 2013-08-28 | 2013-08-28 | A kind of balancing control circuit |
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| Publication Number | Publication Date |
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| CN104426177A CN104426177A (en) | 2015-03-18 |
| CN104426177B true CN104426177B (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310382120.8A Active CN104426177B (en) | 2013-08-28 | 2013-08-28 | A kind of balancing control circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105161783B (en) * | 2015-10-14 | 2017-12-19 | 矽力杰半导体技术(杭州)有限公司 | Cell equalization method |
| CN107181301A (en) * | 2017-06-23 | 2017-09-19 | 上海动力储能电池系统工程技术有限公司 | A kind of multi-string lithium ion super capacitor group balanced management method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877423A (en) * | 2009-12-04 | 2010-11-03 | 北京华大智宝电子系统有限公司 | Chip for balance control of batteries |
| 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 |
| CN102790410A (en) * | 2011-05-20 | 2012-11-21 | 中国科学院广州能源研究所 | Storage battery charging-discharging system and control method thereof for new energy power generating system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5918961B2 (en) * | 2011-10-07 | 2016-05-18 | 株式会社ケーヒン | Cell balance control device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877423A (en) * | 2009-12-04 | 2010-11-03 | 北京华大智宝电子系统有限公司 | Chip for balance control of batteries |
| CN102790410A (en) * | 2011-05-20 | 2012-11-21 | 中国科学院广州能源研究所 | Storage battery charging-discharging system and control method thereof for new energy power generating system |
| 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 |
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| CN104426177A (en) | 2015-03-18 |
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