CN106985699A - The electric quantity balancing device and method between multiple cells in battery pack - Google Patents
The electric quantity balancing device and method between multiple cells in battery pack Download PDFInfo
- Publication number
- CN106985699A CN106985699A CN201710312243.2A CN201710312243A CN106985699A CN 106985699 A CN106985699 A CN 106985699A CN 201710312243 A CN201710312243 A CN 201710312243A CN 106985699 A CN106985699 A CN 106985699A
- Authority
- CN
- China
- Prior art keywords
- cell
- electricity
- battery pack
- average
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000005611 electricity Effects 0.000 claims abstract description 227
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 239000000178 monomer Substances 0.000 claims abstract description 10
- 239000004065 semiconductor Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 238000005303 weighing Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/22—Balancing the charge of battery modules
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to battery balanced technical field, the electric quantity balancing device and method between multiple cells in a kind of battery pack is disclosed.The electric quantity balancing device includes：Balance module, the electric energy for absorbing the cell, and the other monomers battery in the battery pack is discharged using the electric energy；Electric power detection module, the electricity SOC for detecting each cellnn；And control device, the average electricity for calculating cellAnd determine cell of the electricity more than cell average electricity in the battery pack, and the cell using electricity in the battery pack more than cell average electricity charges to the balance module, the electric energy that the balance module is charged using it is controlled to discharge the cell that electricity in the battery pack is less than cell average electricity afterwards.The present invention realizes the active equalization in battery pack, effectively improves the uniformity of battery pack, improves the service life of battery.
Description
Technical field
The present invention relates to battery balanced technical field, more particularly to the electricity between multiple cells in battery pack
Measure balancer and method.
Background technology
Influenceed by energy crisis and environmental crisis, Development of Electric Vehicles is rapid, and lithium battery is used as the master of electric automobile
Mobilization force source then receives much concern.Lithium battery is on electric automobile during practice, using the form of battery pack, but due to lithium
Small performance difference of the battery in production, causes the inconsistency of lithium battery group in actual use gradually to increase,
If carrying out equilibrium treatment not in time, the inconsistency constantly increased can cause the life-span of lithium battery group to terminate in advance.
Main flow balanced way is passive balanced and active equalization, passive balanced mainly by every section cell two ends
A power resistor and switch in parallel, when certain economize on electricity cell voltage is higher, adhesive switch consumes part electricity, until reaching
Weighing apparatus state.In this fashion, power resistor converts electrical energy into heat energy, if radiating is unreasonable, can cause whole electricity
Pond combined equalization module temperature is too high, the consequence for causing battery to accelerate decay and balance module to burn.
The content of the invention
The invention provides electric quantity balancing side's device and method between multiple cells in a kind of battery pack, it is used for
Solve battery balanced efficiency in the prior art low, big technical problem is lost.
To achieve these goals, one aspect of the present invention provides the electricity between multiple cells in a kind of battery pack
Balancer, the electric quantity balancing device includes：Balance module, the electric energy for absorbing the cell, and utilize the electric energy
Other monomers battery in the battery pack is discharged；Electric power detection module, the electricity for detecting each cell
SOCnn；And control device, for performing following operation：According to the electricity SOC of each cellnn, calculate cell
Average electricityDetermine cell of the electricity more than cell average electricity in the battery pack；And utilize institute
State electricity in battery pack to charge to the balance module more than the cell of cell average electricity, control afterwards should
Balance module is less than the cell of cell average electricity using its electric energy being charged to electricity in the battery pack
Discharged.
Preferably, the calculation formula of the average electricity of the cell is
Wherein, the battery pack includes n cell, the SOC11For the electricity of the 1st cell, the SOC12For the 2nd
Electricity ... the SOC of cell1nFor the electricity of n-th of cell.
Preferably, the battery pack is that n cell is in series；The balance module comprising multiwinding transformer,
Primary control switch and multiple secondary controlling switches corresponding with cell in battery pack, wherein, the Multiple coil transformation
Device includes primary coil and multiple secondary coils, and described primary coil is connected in parallel on the battery pack two ends, the primary control switch series connection
In the loop that primary coil and the battery pack are constituted, and a pair of secondary coil in multiple secondary coils and the cell 1
Should, each cell two ends secondary coil in parallel, the loop that each cell secondary coil in parallel with its two ends is constituted
In be in series with a secondary controlling switch.
Preferably, the control device is used to perform following operation：Disconnect the primary control switch and electricity is less than
The corresponding secondary controlling switch of cell of cell average electricity, closes the electricity and is more than cell average electricity
The corresponding secondary controlling switch of cell, with cause the electricity be more than cell average electricity cell to this
Secondary coil corresponding to cell is charged；Disconnect cell correspondence of the electricity more than cell average electricity
Secondary controlling switch, close the primary control switch and electricity be less than the cell correspondence of cell average electricity
Secondary controlling switch, make the multiwinding transformer to the electricity be less than cell average electricity cell enter to put
Electricity.
Preferably, the primary control switch and secondary controlling switch are metal-oxide-semiconductor.
Second aspect of the present invention provides the electric quantity balancing method between multiple cells in a kind of battery pack, the electricity
Equalization methods include：Detect the electricity SOC of each cell in battery packnn；According to the electricity of each cell
SOCnn, calculate the average electricity of cellDetermine list of the electricity more than cell average electricity in the battery pack
Body battery；And the cell using electricity in the battery pack more than cell average electricity fills to balance module
Electricity, controls the electric energy that the balance module is charged using it to be less than the average electricity of cell to electricity in the battery pack afterwards
The cell of amount is discharged.
Preferably, the calculation formula of the average electricity of the cell is
Wherein, the battery pack includes n cell, the SOC11For the electricity of the 1st cell, the SOC12For the 2nd
Electricity ... the SOC of cell1nFor the electricity of n-th of cell.
Preferably, the battery pack is that n cell is in series；The balance module comprising multiwinding transformer,
Primary control switch and multiple secondary controlling switches corresponding with cell in battery pack, wherein, the Multiple coil transformation
Device includes primary coil and multiple secondary coils, and described primary coil is connected in parallel on the battery pack two ends, the primary control switch series connection
In the loop that primary coil and the battery pack are constituted, and a pair of secondary coil in multiple secondary coils and the cell 1
Should, each cell two ends secondary coil in parallel, the loop that each cell secondary coil in parallel with its two ends is constituted
Middle once level controlling switch of connecting.
Preferably, the cell for being more than cell average electricity using electricity in the battery pack enters to balance module
Row charging, controls the electric energy that the balance module is charged using it flat less than cell to electricity in the battery pack afterwards
The cell of equal electricity is discharged, including：Disconnect the primary control switch and electricity is less than the average electricity of cell
The corresponding secondary controlling switch of cell of amount, closes the cell correspondence that the electricity is more than cell average electricity
Secondary controlling switch, with cause the electricity be more than cell average electricity cell to corresponding to the cell
Secondary coil charged；The electricity secondary control corresponding more than the cell of cell average electricity is disconnected to open
Close, close the secondary control corresponding less than the cell of cell average electricity of the primary control switch and electricity and open
Close, the cell that the multiwinding transformer is less than cell average electricity to the electricity is entered electric discharge.
Preferably, the primary control switch and secondary controlling switch are metal-oxide-semiconductor.
By above-mentioned technical proposal, compared with prior art, the present invention has circuit simple, and equalization efficiency is high, is lost small
Advantage.Using technical scheme, it is possible to achieve the active equalization in battery pack, reduce the inconsistency in battery,
The uniformity in battery pack is effectively improved, extends battery.
Brief description of the drawings
Fig. 1 is the structure chart of the electric quantity balancing device between a kind of battery pack provided in an embodiment of the present invention；
Fig. 2 is the circuit diagram of the electric quantity balancing module between a kind of battery pack provided in an embodiment of the present invention；
Fig. 3 is the electric quantity balancing device between multiple cells in a kind of battery pack provided in an embodiment of the present invention
Structure chart；
Fig. 4 is the electric quantity balancing module between multiple cells in a kind of battery pack provided in an embodiment of the present invention
Circuit diagram；
Fig. 5 is the workflow schematic diagram of the electric quantity balancing method between a kind of battery pack provided in an embodiment of the present invention；
Fig. 6 is the electric quantity balancing method between multiple cells in a kind of battery pack provided in an embodiment of the present invention
Workflow schematic diagram.
Description of reference numerals
The control device of 1 electric power detection module 2
The battery pack of 3 balance module 4
PACK11st battery pack PACK22nd battery pack
T11st multiwinding transformer T22nd multiwinding transformer
K11st primary control switch K22nd primary control switch
S1n1st battery pack n-th level controlling switch S2n2nd battery pack n-th level controlling switch
B1n1st the n-th cell of battery pack B2n2nd the n-th cell of battery pack
Battery pack average electricity SOCnThe electricity of n-th of battery pack
N-th batteries monomer battery average electricity PACKnN-th of battery pack
SOCnnN-th the n-th electric quantity of single batteries of battery pack
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Below in conjunction with the accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention.
Obviously, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the reality in the present invention
Example is applied, all other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made all belongs to
In the scope of protection of the invention.
Fig. 1 is the structure chart of the electric quantity balancing device between a kind of battery pack that one embodiment of the invention is provided.Such as Fig. 1 institutes
Show, the present invention provides the electric quantity balancing device between a kind of battery pack, the electric quantity balancing device includes：Electric power detection module 1, control
Device 2 processed, balance module 3 and battery pack 4.Wherein, balance module 3 is used for the electric energy for absorbing battery pack, and utilizes the electric energy
Other battery packs are discharged；Electric power detection module 1 is used for the electricity SOC for detecting each battery packn；Control module 2 is used for
Perform following operate：Receive the electricity SOC of each above-mentioned battery packn, according to the SOCnCalculate the average electricity of battery packBy SOCnWithIt is compared, determines that electricity is more than battery pack average electricity in battery pack 4Battery pack and electricity
Amount is less than battery pack average electricityBattery pack, and using electricity be more than battery pack average electricityBattery pack to equal
Weighing apparatus module 3 charges, and controls the electric energy that the balance module 3 is charged using it to be less than battery pack average electricity to electricity again afterwardsCell discharged.Above-mentioned electric quantity balancing device by electricity by being higher than battery pack average electricityElectricity
Unnecessary electricity in the group of pond is transferred to electricity less than battery pack average electricityBattery pack in, realize between battery pack
Electric quantity balancing, reduces the inconsistency between battery pack, improves the service life of battery.
Technical scheme can realize the electric quantity balancing between n battery pack, now between two battery packs
Exemplified by electric quantity balancing.
Fig. 2 is a kind of circuit diagram of electric quantity balancing module provided in an embodiment of the present invention, it is preferable that the present invention can be used
Multiwinding transformer type equalizing circuit.The present embodiment is by taking the balance module between two battery packs as an example, the equilibrium of the present embodiment
Module includes two battery packs, two multiwinding transformers corresponding with two battery packs, two primary control switches and with
The one-to-one secondary controlling switch of cell in battery pack.
As shown in Fig. 2 the battery is by battery pack PACK1With battery pack PACK2Composition, battery pack PACK1With battery pack
PACK2It is connected in series, and each battery pack is in series by n cell.Multiwinding transformer T1、T2Respectively with electricity
Pond group PACK1、PACK2Corresponding, each multiwinding transformer includes primary coil and multiple secondary coils, multiwinding transformer T1's
Primary coil is connected in parallel on battery pack PACK1Two ends, primary control switch K1It is connected on multiwinding transformer T1Primary coil and battery pack
PACK1In the loop of composition, multiwinding transformer T1Secondary coil and battery pack PACK1Interior cell is corresponded, battery
Group PACK1Interior one multiwinding transformer T of each cell two ends parallel connection1Secondary coil, battery pack PACK1Interior is each
Cell and the multiwinding transformer T at its two ends1The loop that is constituted of secondary coil in be in series with a secondary controlling switch,
Multiwinding transformer T2Battery pack PACK is connected in the same way2。
Wherein, as shown in Fig. 2 adjacent cell group PACK1And PACK2Multiwinding transformer T corresponding to each1And T2's
There is overlapping region in primary coil, to cause battery pack PACK1And PACK2Multiwinding transformer T corresponding to each1And T2It can lead to
The cell positive energy exchange positioned at the overlapping region is crossed, the cell of the overlapping region shown in Fig. 2 is cell B21。
Electric power detection module detects the electricity SOC of each battery packnThe electricity is input to control device, control dress afterwards
Put the average electricity that battery pack is calculated according to above-mentioned dataAnd by the electricity SOC of battery packnWith the average electricity of battery pack
AmountCompare, and control balance module to carry out following act：Disconnect the battery pack for being more than battery pack average electricity with electricity
The primary control switch of connection and it is less than the primary control switch that be connected of battery pack of battery pack average electricity and secondary with electricity
Level controlling switch, closes the electricity secondary control corresponding more than cell in the battery pack of battery pack average electricity and opens
Close, the multiwinding transformer that pair battery pack for being more than battery pack average electricity with the electricity is connected charges；Disconnect the electricity
More than the corresponding secondary controlling switch of cell in the battery pack of battery pack average electricity, closure is more than battery with the electricity
Primary control switch and correspond to multiwinding transformer primary coil overlay region with described that the battery pack of group average electricity is connected
The secondary controlling switch of the cell connection in domain, makes many more than what the battery pack of battery pack average electricity was connected with the electricity
Winding transformer discharges the cell corresponding to multiwinding transformer primary coil overlapping region；Disconnect and the electricity
The primary control switch connected more than the battery pack of battery pack average electricity, closure is less than the average electricity of battery pack with described and electricity
The primary control switch of the battery pack connection of amount, makes the cell for corresponding to multiwinding transformer primary coil overlapping region
Pair with the electricity be less than battery pack average electricity battery pack be connected multiwinding transformer charging；Disconnection corresponds to described
The secondary controlling switch of the cell connection of multiwinding transformer primary coil overlapping region, closure is less than battery with the electricity
The secondary controlling switch of other monomers battery connection in the battery pack of group average electricity, makes average less than battery pack with the electricity
The multiwinding transformer of the battery pack connection of electricity is less than the battery power discharge of battery pack average electricity to the electricity.
If as shown in Fig. 2 battery pack PACK1Electricity be more than battery pack PACK2Electricity, then control module control is equal
The module that weighs carries out following act：Disconnect and battery pack PACK1The primary control switch K of connection1And with battery pack PACK2Connection
Primary control switch K2With secondary controlling switch S2n, closure battery pack PACK1The corresponding secondary controlling switch of interior cell
S1n, make battery pack PACK1To multiwinding transformer T1Charging；Secondary controlling switch S is disconnected again1n, closure primary control switch K1
And with cell B21The secondary controlling switch S of connection21, make multiwinding transformer T1To cell B21Electric discharge；Disconnect
Primary control switch K1, closure primary control switch K2, make cell B21To multiwinding transformer T2Charging；Disconnect and monomer
Battery B21The secondary controlling switch S of connection21, close and battery pack PACK2The secondary controlling switch of interior other cell connections,
Make multiwinding transformer T2To the battery pack PACK less than battery pack average electricity2Electric discharge.Thus by balance module by battery
Group PACK1Interior unnecessary electricity is transferred to battery pack PACK2, by multiple conversions, the battery being finally reached between battery pack is equal
Weighing apparatus.
After the electric quantity balancing between battery pack is finished, the technical scheme that can be also provided by the present invention is realized in battery pack
Electric quantity balancing between cell.Fig. 3 be one embodiment of the invention provide a kind of battery pack in multiple cells it
Between electric quantity balancing device structure chart.As shown in figure 3, the electric quantity balancing device bag between multiple cells in battery pack
Include：One battery pack PACKn, electric power detection module 1, control device 2 and balance module 3.Wherein, battery pack PACKnInside have many
Individual cell；Balance module 3 is used to absorbing the electric energy of battery assembly module, and using the electric energy to other in the battery pack
Cell is discharged；Electric power detection module 1 is used for the electricity SOC for detecting each cellnn；Control module 2 is used to hold
Row is following to be operated：Receive the electricity SOC of each above-mentioned cellnn, according to the SOCnnCalculate the average electricity of cellBy SOCnnWithIt is compared, determines battery pack PACKnMiddle electricity is more than cell average electricity's
Cell, and utilize battery pack PACKnMiddle electricity is more than cell average electricityCell to equilibrium model
Block 3 is charged, and controls the electric energy that the balance module 3 is charged using it again afterwards to battery pack PACKnMiddle electricity is less than
Cell average electricityCell discharged.Above-mentioned electric quantity balancing device is by by battery pack PACKnInterior electricity
Amount is more than average electricityCell in unnecessary electricity be transferred to less than average electricityCell in,
The equilibrium of battery electric quantity in battery pack is realized, the inconsistency in battery pack is reduced, the service life of battery is improved.
Fig. 4 is the electric quantity balancing module between multiple cells in a kind of battery pack provided in an embodiment of the present invention
Circuit diagram.Preferably, the present invention can use multiwinding transformer type equalizing circuit.To realize battery pack PACK1Interior monomer electricity
Between pond exemplified by electric quantity balancing, the balance module of the present embodiment includes multiwinding transformer T1, primary control switch K1, Yi Jiyu
The corresponding multiple secondary controlling switches of cell in battery pack.
As shown in figure 4, battery pack PACK1It is in series by n cell, transformer T1Have a primary coil and
Multiple secondary coils, wherein, primary coil is connected in parallel on battery pack PACK1Two ends, primary control switch K1It is connected on primary coil and battery pack
PACK1In the loop of composition, secondary coil is all corresponded with cell, each cell two ends secondary coil in parallel,
A secondary controlling switch is in series with the loop that each cell secondary coil in parallel with its two ends is constituted.
Electric power detection module 1 detects the electricity SOC of each cell1nAfterwards by the data input to control unit 2, control
Unit 2 processed calculates the average electricity of cell according to above-mentioned dataAnd by the electricity SOC of cell1nWith monomer
The average electricity of batteryCompare, and control balance module 3 to carry out following action：Disconnect primary control switch K1And
Electricity is less than cell average electricityThe corresponding secondary controlling switch of cell, closure electricity be more than monomer electricity
Pond average electricityThe corresponding secondary controlling switch of cell so that the high cell of electricity is to the cell
Corresponding secondary coil is charged；Electricity is then turned off more than cell average electricityCell it is corresponding time
Level controlling switch, closure primary control switch K1And electricity is less than cell average electricityCell it is corresponding
Secondary controlling switch, so that multiwinding transformer T1To battery pack PACK1The small cell of interior electricity is discharged.This implementation
Example employs multiwinding transformer as the main devices of balance module, can improve equalization efficiency, and reduce electric energy loss.
Fig. 5 is the workflow diagram of the electric quantity balancing method between a kind of battery pack provided in an embodiment of the present invention.Such as Fig. 5
Shown, the present invention also provides a kind of electric quantity balancing method between battery pack, including：First detect the electricity of each battery pack
SOCn；According to the electricity SOC of each battery packn, calculate battery pack average electricityDetermine that electricity is average more than battery pack
The battery pack of electricity；And the battery pack using the electricity more than battery pack average electricity is filled to the balance module
Electricity, controls the balance module to be less than the battery pack of battery pack average electricity to the electricity using its electric energy being charged afterwards
Discharged, by using the above method, the electricity of the high battery pack of electricity can be transferred to the low battery pack of electricity, reduced
Inconsistency between battery pack.The above method, which is repeated several times, can realize the electric quantity balancing between battery pack.
With reference to Fig. 2 and Fig. 5, electric quantity balancing method between battery pack is explained by taking two battery packs as an example.This implementation
Battery pack PACK in example1With battery pack PACK2It is connected in series, each battery pack is in series by n cell；Equilibrium model
Block 3 includes multiwinding transformer T1、T2, T1、T2Correspond respectively to battery pack PACK1、PACK2, each multiwinding transformer includes
Primary coil and multiple secondary coils, multiwinding transformer T1Primary coil be connected in parallel on battery pack PACK1Two ends, primary control switch K1
It is connected on multiwinding transformer T1Primary coil and battery pack PACK1In the loop of composition, multiwinding transformer T1Secondary coil with
Battery pack PACK1Interior cell is corresponded, battery pack PACK1Interior each cell two ends Multiple coil in parallel
Transformer T1Secondary coil, battery pack PACK1Interior each cell and the multiwinding transformer T at its two ends1Secondary coil institute
A secondary controlling switch, multiwinding transformer T are in series with the loop of composition2Battery pack PACK is connected in the same way2。
Wherein, as shown in Fig. 2 adjacent cell group PACK1And PACK2Multiwinding transformer T corresponding to each1And T2's
There is overlapping region in primary coil, to cause battery pack PACK1And PACK2Multiwinding transformer T corresponding to each1And T2It can lead to
The cell positive energy exchange positioned at the overlapping region is crossed, the cell of the overlapping region shown in Fig. 2 is cell B21。
Electric quantity balancing method between the battery pack that the present embodiment is provided, is to be more than battery pack average electricity using electricityBattery pack the balance module 3 is charged, the electric energy pair for controlling the balance module 3 to be charged using it afterwards
Electricity is less than battery pack average electricityBattery pack carry out electric discharge and reach the purpose of balanced electricity.Corresponding, with battery
Group PACK1Electricity SOC1More than battery pack average electricityExemplified by, circuit diagram as shown in Figure 2 does following action, including：It is disconnected
Open and battery pack PACK1The primary control switch K of connection1And with battery pack PACK2The primary control switch K of connection2And secondary
Controlling switch S2n, closure battery pack PACK1The corresponding secondary controlling switch S of interior cell1n, make battery pack PACK1To more around
Group transformer T1Charging；Secondary controlling switch S is disconnected again1n, closure primary control switch K1And with cell B21Connection
Secondary controlling switch S21, make multiwinding transformer T1To cell B21Electric discharge；Disconnect primary control switch K1, closure primary
Controlling switch K2, make cell B21To multiwinding transformer T2Charging；Disconnect and cell B21The secondary control of connection is opened
Close S21, close and battery pack PACK2The secondary controlling switch of interior other cell connections, makes multiwinding transformer T2To less than
The battery pack PACK of battery pack average electricity2Electric discharge.Thus by balance module by battery pack PACK1Interior unnecessary electricity turns
Move on to battery pack PACK2, by multiple conversions, it is finally reached the electric quantity balancing between battery pack.
Fig. 6 is the work of the electric quantity balancing method between multiple cells in a kind of battery pack that the present embodiment is provided
Schematic flow sheet.After the electric quantity balancing between battery pack is finished, the method that can be provided using Fig. 6 is to multiple in battery pack
Electric quantity balancing is carried out between cell.
As shown in fig. 6, electric quantity balancing method includes between cell in the battery pack：First detect each list in battery pack
The electricity SOC of body batterynn；According to the electricity SOC of each cellnn, calculate the average electricity of cellReally
Electricity is more than cell average electricity in the fixed battery packCell；And it is big using electricity in battery pack
In cell average electricityCell balance module 3 is charged, control the balance module 3 to utilize afterwards
Its electric energy being charged is less than cell average electricity to electricity in the battery packCell put
Electricity.
With reference to Fig. 4 and Fig. 6, to realize battery pack PACK1This method is carried out exemplified by electric quantity balancing between interior cell
Explain.As shown in figure 4, disconnecting and battery pack PACK1The primary control switch K of connection1And battery pack PACK1Interior electricity is less than
Cell average electricityThe corresponding secondary controlling switch of cell, closure battery pack PACK1Interior electricity is more than single
Body battery average electricityThe corresponding secondary controlling switch of cell, to cause battery pack PACK1The interior electricity is big
In cell average electricityCell the secondary coil corresponding to the cell is charged；Disconnect battery
Group PACK1The interior electricity is more than cell average electricityThe corresponding secondary controlling switch of cell, closure electricity
Pond group PACK1The interior primary control switch K1And electricity is less than cell average electricityCell it is corresponding
Secondary controlling switch, makes multiwinding transformer T1To battery pack PACK1Interior electricity is less than cell average electricityList
Body battery enters electric discharge.Thus by battery pack PACK1The high electric quantity of single batteries of electricity is transferred to the low cell of electricity, reaches
Electric quantity of single batteries purpose is in a balanced way arrived in battery pack.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited thereto.At this
In the range of the technology design of invention, a variety of simple variants, including each particular technique can be carried out to technical scheme
Feature is combined in any suitable manner.In order to avoid unnecessary repetition, the present invention is to various possible combinations
No longer separately illustrate.But these simple variants and combination should equally be considered as content disclosed in this invention, belong to the present invention
Protection domain.
In addition, various embodiments of the present invention can be combined randomly, without departing from this hair
Bright thought, it should equally be considered as content disclosed in this invention.
Claims (10)
1. the electric quantity balancing device between multiple cells in a kind of battery pack, it is characterised in that including：
Balance module, the electric energy for absorbing the cell, and using the electric energy to the other monomers in the battery pack
Battery is discharged；
Electric power detection module, the electricity SOC for detecting each cellnn；And
Control device, for performing following operation：
According to the electricity SOC of each cellnn, calculate the average electricity of cell
Determine cell of the electricity more than cell average electricity in the battery pack；And
The cell for being more than cell average electricity using electricity in the battery pack charges to the balance module,
The electric energy that the balance module is charged using it is controlled to be less than cell average electricity to electricity in the battery pack afterwards
Cell discharged.
2. electric quantity balancing device according to claim 1, it is characterised in that the calculating of the average electricity of the cell
Formula isWherein, the battery pack includes n cell, the SOC11For
Electricity, the SOC of 1st cell12For electricity ... the SOC of the 2nd cell1nFor n-th of cell
Electricity.
3. electric quantity balancing device according to claim 1, it is characterised in that the battery pack is n cell series connection
Form；The balance module includes multiwinding transformer, primary control switch and corresponding with cell in battery pack many
Individual secondary controlling switch, wherein,
The multiwinding transformer includes primary coil and multiple secondary coils,
Described primary coil is connected in parallel on the battery pack two ends, and the primary control switch is connected on primary coil and the battery pack structure
Into loop in, and
Secondary coil in multiple secondary coils is corresponded with the cell, each cell two ends secondary coil in parallel,
A secondary controlling switch is in series with the loop that each cell secondary coil in parallel with its two ends is constituted.
4. electric quantity balancing device according to claim 3, it is characterised in that the control device is used to perform following behaviour
Make：
Disconnect the primary control switch and electricity is less than the corresponding secondary control of cell of cell average electricity
Switch, closes the corresponding secondary controlling switch of cell that the electricity is more than cell average electricity, described to cause
The cell that electricity is more than cell average electricity charges to the secondary coil corresponding to the cell；
The corresponding secondary controlling switch of cell that the electricity is more than cell average electricity is disconnected, the primary is closed
Controlling switch and electricity are less than the corresponding secondary controlling switch of cell of cell average electricity, make the Multiple coil
The cell that transformer is less than cell average electricity to the electricity enters electric discharge.
5. electric quantity balancing device according to claim 3, it is characterised in that the primary control switch and secondary control are opened
Close as metal-oxide-semiconductor.
6. a kind of electric quantity balancing method between multiple cells in battery pack, it is characterised in that including：
Detect the electricity SOC of each cell in battery packnn；
According to the electricity SOC of each celln, calculate the average electricity of cell
Determine cell of the electricity more than cell average electricity in the battery pack；And
The cell for being more than cell average electricity using electricity in the battery pack charges to balance module, afterwards
The balance module is controlled to be less than the list of cell average electricity to electricity in the battery pack using its electric energy being charged
Body battery is discharged.
7. electric quantity balancing method according to claim 6, it is characterised in that the calculating of the average electricity of the cell
Formula isWherein, the battery pack includes n cell, the SOC11For
Electricity, the SOC of 1st cell12For electricity ... the SOC of the 2nd cell1nFor n-th of cell
Electricity.
8. electric quantity balancing method according to claim 6, it is characterised in that the battery pack is n cell series connection
Form；The balance module includes multiwinding transformer, primary control switch and corresponding with cell in battery pack many
Individual secondary controlling switch, wherein,
The multiwinding transformer includes primary coil and multiple secondary coils,
Described primary coil is connected in parallel on the battery pack two ends, and the primary control switch is connected on primary coil and the battery pack structure
Into loop in, and
Secondary coil in multiple secondary coils is corresponded with the cell, each cell two ends secondary coil in parallel,
Connected in the loop that each cell and its two ends secondary coil in parallel are constituted once level controlling switch.
9. electric quantity balancing method according to claim 8, it is characterised in that be more than monomer using electricity in the battery pack
The cell of battery average electricity charges to balance module, the electricity for controlling the balance module to be charged using it afterwards
The cell that electricity in the battery pack is less than cell average electricity can be discharged, including：
Disconnect the primary control switch and electricity is less than the corresponding secondary control of cell of cell average electricity
Switch, closes the corresponding secondary controlling switch of cell that the electricity is more than cell average electricity, described to cause
The cell that electricity is more than cell average electricity charges to the secondary coil corresponding to the cell；
The corresponding secondary controlling switch of cell that the electricity is more than cell average electricity is disconnected, the primary is closed
Controlling switch and electricity are less than the corresponding secondary controlling switch of cell of cell average electricity, make the Multiple coil
The cell that transformer is less than cell average electricity to the electricity enters electric discharge.
10. electric quantity balancing method according to claim 8, it is characterised in that the primary control switch and secondary control
Switch as metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710312243.2A CN106985699B (en) | 2017-05-05 | 2017-05-05 | Device and method for balancing electric quantity among multiple single batteries in battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710312243.2A CN106985699B (en) | 2017-05-05 | 2017-05-05 | Device and method for balancing electric quantity among multiple single batteries in battery pack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106985699A true CN106985699A (en) | 2017-07-28 |
| CN106985699B CN106985699B (en) | 2023-10-27 |
Family
ID=59418088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710312243.2A Active CN106985699B (en) | 2017-05-05 | 2017-05-05 | Device and method for balancing electric quantity among multiple single batteries in battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106985699B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111152686A (en) * | 2019-12-31 | 2020-05-15 | 江西科然科技有限公司 | Battery management system for active equalization of battery pack of electric vehicle |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101606299A (en) * | 2007-02-09 | 2009-12-16 | Sk能源株式会社 | Charge equalization apparatus |
| CN102468674A (en) * | 2010-11-08 | 2012-05-23 | 凹凸电子（武汉）有限公司 | Battery management systems and methods for controlling electric light source |
| CN202856386U (en) * | 2012-07-31 | 2013-04-03 | 刘阶萍 | Charge-discharge active equalizing smart battery module and system |
| US20130147438A1 (en) * | 2011-12-08 | 2013-06-13 | GM Global Technology Operations LLC | Combined pi feedback and feedforward cell balancing method |
| CN104442437A (en) * | 2014-11-19 | 2015-03-25 | 北京新能源汽车股份有限公司 | Electric vehicle optimized energy system with balance function |
| CN105871019A (en) * | 2016-05-11 | 2016-08-17 | 安徽锐能科技有限公司 | Passive balance control method |
| CN106099898A (en) * | 2015-04-30 | 2016-11-09 | 保时捷股份公司 | There is the battery system of battery control piece |
| CN106410895A (en) * | 2016-09-27 | 2017-02-15 | 北京新能源汽车股份有限公司 | Battery balancing device, automobile battery balancing system and balancing method |
| CN206797153U (en) * | 2017-05-05 | 2017-12-26 | 安徽锐能科技有限公司 | The electric quantity balancing device between multiple cells in battery pack |
-
2017
- 2017-05-05 CN CN201710312243.2A patent/CN106985699B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101606299A (en) * | 2007-02-09 | 2009-12-16 | Sk能源株式会社 | Charge equalization apparatus |
| US20100148726A1 (en) * | 2007-02-09 | 2010-06-17 | Energy Co., Ltd. | Charge equalization apparatus |
| CN102468674A (en) * | 2010-11-08 | 2012-05-23 | 凹凸电子（武汉）有限公司 | Battery management systems and methods for controlling electric light source |
| US20130147438A1 (en) * | 2011-12-08 | 2013-06-13 | GM Global Technology Operations LLC | Combined pi feedback and feedforward cell balancing method |
| CN202856386U (en) * | 2012-07-31 | 2013-04-03 | 刘阶萍 | Charge-discharge active equalizing smart battery module and system |
| CN104442437A (en) * | 2014-11-19 | 2015-03-25 | 北京新能源汽车股份有限公司 | Electric vehicle optimized energy system with balance function |
| CN106099898A (en) * | 2015-04-30 | 2016-11-09 | 保时捷股份公司 | There is the battery system of battery control piece |
| CN105871019A (en) * | 2016-05-11 | 2016-08-17 | 安徽锐能科技有限公司 | Passive balance control method |
| CN106410895A (en) * | 2016-09-27 | 2017-02-15 | 北京新能源汽车股份有限公司 | Battery balancing device, automobile battery balancing system and balancing method |
| CN206797153U (en) * | 2017-05-05 | 2017-12-26 | 安徽锐能科技有限公司 | The electric quantity balancing device between multiple cells in battery pack |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111152686A (en) * | 2019-12-31 | 2020-05-15 | 江西科然科技有限公司 | Battery management system for active equalization of battery pack of electric vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106985699B (en) | 2023-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101764421B (en) | Equalizing equipment for battery units of electric automobile | |
| CN104734236B (en) | Battery set charge/discharge device and method | |
| CN103457325B (en) | A kind of direct-type lithium ion battery non-dissipative equalizing circuit and balance control method | |
| CN105140998B (en) | The two-way non-dissipative equalizing circuit of series battery based on inductive energy storage | |
| CN107733007B (en) | Dual-target direct equalization circuit and equalization method for battery pack | |
| CN107134599B (en) | Voltage equalization circuit of series battery pack and working method thereof | |
| CN107749500B (en) | For battery balanced method and device | |
| CN103413981B (en) | method and apparatus for battery pack capacity | |
| CN107732331A (en) | A kind of serial lithium battery group SOC balance control method of global optimization control | |
| CN107359669A (en) | Space high tension battery group balanced type charging management system and its control method | |
| CN107195994A (en) | Active equalization device for battery pack | |
| CN108039759A (en) | A kind of lithium-ion battery systems multiplex mode high efficiency energy balanced device and its control method | |
| CN104113110A (en) | Battery equalization circuit | |
| CN107154656A (en) | Electric quantity balancing device and method between battery pack | |
| CN103560561B (en) | A kind of balanced charge-discharge device of lithium battery management system | |
| CN107369858A (en) | A kind of battery pack Bi-objective equalizing circuit control strategy stage by stage | |
| CN104442437B (en) | A kind of electric automobile optimization energy resource system for having equalization function concurrently | |
| CN106655307A (en) | Battery pack equalization circuit | |
| CN107342442A (en) | A kind of battery pack non-dissipative equalizing circuit based on circuit of reversed excitation | |
| CN106712168A (en) | Parallel battery pack two-way lossless equalization circuit based on inductance energy storage | |
| CN101257220A (en) | Method for charging lithium ion batteries | |
| CN103682483A (en) | Lithium battery | |
| CN206797153U (en) | The electric quantity balancing device between multiple cells in battery pack | |
| CN106985699A (en) | The electric quantity balancing device and method between multiple cells in battery pack | |
| CN207074872U (en) | Active equalization device for battery pack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |