CN102231554B - A kind of complete compatible electrokinetic cell balancer and method - Google Patents
A kind of complete compatible electrokinetic cell balancer and method Download PDFInfo
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- CN102231554B CN102231554B CN201110187656.5A CN201110187656A CN102231554B CN 102231554 B CN102231554 B CN 102231554B CN 201110187656 A CN201110187656 A CN 201110187656A CN 102231554 B CN102231554 B CN 102231554B
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- cell
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- battery pack
- switching tube
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Abstract
The invention provides a kind of balancer and the method for complete compatible electrokinetic cell, power battery pack includes n the cell B connected1、B2…Bn, corresponding each cell Bn, have a switch transistor TnWith equalizing resistance RnThe equilibrium branch road of series connection is connected in parallel；There is an equalizer switch UnFor switch transistor TnAccessing power-on, described power-on is m times of cell of approximation, is directly derived from power battery pack, equalizer switch UnFor switch transistor TnAccess cell B in power battery packn‑(m‑1)To BnThe battery supply of series connection, wherein switch transistor T1…Tm‑1By corresponding external insulating power supply V1…Vm‑1Power-on is provided.The present invention can mate the electrokinetic cell of various of monomer cell voltage, improves battery management balance system to the matching of novel battery and the compatibility to all electrokinetic cells, reduces specific customization, effectively reduce cost.
Description
Technical field
The present invention relates to a kind of for Vehicular battery management system regions, be specifically related to a kind of compatible battery
Balancer and equalization methods.
Background technology
Battery, as the core of electric automobile, directly affects cornering ability and the security performance of electric automobile,
Along with the development of electric vehicle engineering, battery becomes the key factor of restriction electric vehicle engineering development.
Vehicle mounted dynamic battery group as electric automobile energy main source is usually to be entered by multiple low tension battery monomers
Row series and parallel forms, owing to the battery cell produced always exists difference more or less, use
During there will be the discordance that voltage is higher or on the low side, can not carry out in time again if there is difference
Equilibrium treatment, then this species diversity can strengthen the most further, if electrokinetic cell is chronically at
The state that this integral energy is uneven, except the serious exhaustion of the capacity that can cause whole set of cells, impact electricity
Outside the service life in pond, even cause cell damage, explode, harm social property and life peace
Entirely.
For eliminating the inhomogeneities of battery cell, the method that general employing is battery balanced.Battery pack balancing
The concordance difference of cell in set of cells is dynamically adjusted by process generally by external circuit,
Reach to safeguard balanced purpose between cell.Modal equalization methods is at cell or battery
A group two ends bypass resistance in parallel, and the break-make of resistance is controlled by a switch, come by resistance
The partial monosomy energy content of battery that attrition voltage is higher, maintains the overall harmonious of set of cells, and switch is the most
Select MOST pipe, the most conventional lithium iron phosphate battery management system, battery cell can be directly accessed and make
For the cut-in voltage of switching tube, and for the relatively low Ni-MH battery of other monomer voltages, capacitor batteries or super
Level electric capacity etc. then cannot be compatible, and user then needs to come customized corresponding management battery system according to the battery used
System, once changes battery, will cause managing system and lose efficacy or matching degree decline.If by multiple battery cells
It is connected into set of cells raising voltage to open to meet switching tube, makes equalizing resistance access this set of cells to whole
Battery pack balancing, it is impossible to be managed battery cell, has lost the meaning of battery management system.
Summary of the invention
The purpose of the present invention is aiming at the disadvantages mentioned above that prior art exists, it is provided that one can be mated multiple
The battery balanced device of the electrokinetic cell of monomer battery voltage and method, improve battery management balance system pair
The matching of novel battery and the compatibility to all electrokinetic cells, reduce specific customization, reduces cost.
For achieving the above object, the present invention adopts the following technical scheme that:
A kind of complete compatible electrokinetic cell balancer, the electrokinetic cell being connected into including multiple cell B
Group；Multiple equilibrium branch roads being connected into by equalizing resistance R and switch transistor T, equilibrium branch road and cell
B is in parallel；Multiple equalizer switch U, are controlled by control unit, and the switching tube for described equilibrium branch road accesses
Cut-in voltage；Control unit, detects the cell needing equilibrium, controls described equalizer switch；Its
It is characterised by: the independent described equilibrium branch road in parallel of each cell B, opening of each equilibrium branch road
Closing pipe independent by a described equalizer switch U control, described switching tube accesses institute by described equalizer switch
State two cells connected in power battery pack as power-on.
Described two the series connection cells being accessed switching tube by equalizer switch, are opened for described equilibrium for one
Closing corresponding cell, one is the high-order cell connected with this cell, described power current
Equilibrium its switching tube of branch road of the cell of pond group output head anode is provided by external insulating power supply to be opened
Open power supply.
Described equalizer switch is photo-coupler, and described switching tube is field effect transistor, the colelctor electrode of its outfan
Connecing the positive pole of described high-order cell, emitter stage connects described field effect transistor source electrode.
The technical program also includes a kind of complete compatible electrokinetic cell equalization methods, and power battery pack includes n
The cell B of series connection1、B2…Bn, corresponding each cell Bn, have a switch transistor Tn
With equalizing resistance RnThe equilibrium branch road of series connection is connected in parallel；There is an equalizer switch UnFor switch transistor Tn
Accessing power-on, described power-on is m times of cell of approximation, is directly derived from power battery pack,
Equalizer switch UnFor switch transistor TnAccess cell B in power battery packn-(m-1)To BnThe electricity of series connection
Pond power supply, wherein switch transistor T1…Tm-1By corresponding external insulating power supply V1…Vm-1There is provided and open
Power supply.
Described switching tube is field effect transistor, and described cut-in voltage preferably approximates 2 times of monomer battery voltages.
Described insulating power supply is single-ended flyback insulating power supply.
It is an advantage of the current invention that:
To power battery pack more piece cell pressure, it is achieved to monomer battery voltage moving at below 1.5V
The monomer equilibrium of power battery, simultaneously the most conventional compatible monomer battery voltage about 3V lithium battery,
Other electrokinetic cells such as capacitor batteries, reach electrokinetic cell compatible equilibrium entirely.
To monomer battery voltage at the electrokinetic cell of below 1.5V, it is not necessary to outside each cell is increased
Connect equilibrium power supply to provide power-on, it is only necessary to according to the power-on voltage needed for equilibrium branch road dynamic
The multiple of power battery cell, the most several corresponding high-order cell external isolation electricity to power battery pack
Source, has simplified whole battery balanced device structure.
Owing to the electrokinetic cell of various monomer battery voltages can be compatible, therefore vehicle can be as required
Change electrokinetic cell and without change or customize new battery balanced management system, improve the flexible of use
Property, reduce cost.
Accompanying drawing explanation
Fig. 1 is the present invention compatible electrokinetic cell balancer example block diagram entirely；
Fig. 2 is insulating power supply example circuit diagram in the present invention compatible electrokinetic cell balancer entirely.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with the accompanying drawings.
As shown in Figure 1: use the complete compatible of technical solution of the present invention compatible electrokinetic cell equalization methods entirely
Electrokinetic cell balancer, power battery pack includes n the cell B connected1、B2…Bn, corresponding
Each cell Bn, have a switch transistor TnWith equalizing resistance RnSeries connection equilibrium branch road and its
In parallel；There is an equalizer switch UnFor switch transistor TnAccessing power-on, described power-on is near
Like m times of cell, it is directly derived from power battery pack, equalizer switch UnFor switch transistor TnAccess power
Cell B in set of cellsn-(m-1)To BnThe battery supply of series connection, wherein by corresponding external isolation
Power supply V1 ... Vm-1 is switch transistor T 1 ... Tm-1 provides power-on.
Accompanying drawing 1 is the attachment structure taking 2 times of cells of approximation as power-on, i.e. the value of m is 2.
If the monomer battery voltage selected is 1.2V, the cut-in voltage of metal-oxide-semiconductor is 1.5V, then take approximation 2 times
Cell can meet the unlocking condition of switching tube as power-on.
Multiple cell B1、B2…BnThe power battery pack being connected into, B1The most extremely power battery pack
Output head anode, BnThe negative pole that negative pole is power battery pack outfan, B1For B2The high-order list of series connection
Body battery, switching tube selects N-type metal-oxide-semiconductor, equalizer switch employing photo-coupler, it is achieved Phototube Coupling.
To cell B2For, equalizing resistance R2Series connection metal-oxide-semiconductor T2Composition equilibrium branch road, i.e. MOS
Pipe T2Source electrode and drain electrode with equalizing resistance R2After series connection again with cell B2Parallel connection, photo-coupler
U2Input termination control unit, be controlled by control unit.Photo-coupler U2The emitter stage of outfan connects
Metal-oxide-semiconductor T2Grid, colelctor electrode meets cell B1Positive pole, i.e. access in power battery pack single
Body battery B1To B2The battery unit of series connection is as B2The metal-oxide-semiconductor T of equilibrium branch road2Cut-in voltage.
Accordingly, for cell B3, equalizing resistance R3Series connection metal-oxide-semiconductor T3Composition equilibrium branch road,
I.e. metal-oxide-semiconductor T3Source electrode and drain electrode with equalizing resistance R3After series connection again with cell B3Parallel connection, light
Bonder U3Input termination control unit, be controlled by control unit.Photo-coupler U3Sending out of outfan
Emitter-base bandgap grading meets metal-oxide-semiconductor T3Grid, the colelctor electrode of outfan meets cell B2Positive pole, i.e. access dynamic
Cell B in power set of cells2To B3The battery unit of series connection is as B3The metal-oxide-semiconductor T of equilibrium branch road3
Cut-in voltage.
With identical connected mode, until cell Bn。
For cell B1, without the high-order cell of series connection, for meeting metal-oxide-semiconductor T1Unlatching
Voltage, needs external insulating power supply V1.The present embodiment uses 3V single-ended flyback insulating power supply, light
Bonder U1The emitter stage of outfan meets metal-oxide-semiconductor T1Grid, the colelctor electrode of outfan connects insulating power supply
V1Positive pole, insulating power supply V1Negative pole meet metal-oxide-semiconductor T1Source electrode.
The single-end flyback switching power supply such as accompanying drawing 2 that insulating power supply uses.So-called single-ended refer to that high frequency becomes
The magnetic core of parallel operation is only operated in the side of hysteresis curve.As it can be seen, when switching tube Q turns on, high frequency
The induced voltage of transformator T armature winding is upper just lower negative, and commutation diode VD is in cut-off state,
Energy is stored in armature winding.When switching tube Q ends, the energy of storage in transformator T armature winding
Amount, filters backward load output by secondary windings and VD rectification and electric capacity C.
The work process of the present embodiment is as follows:
If according to the data gathered, control unit determines that a certain cell needs to carry out equalization discharge, such as list
Body battery B2, then to photo-coupler U2Input output Continuity signal, control its outfan conducting,
Then cell B1To B2Voltage be added in metal-oxide-semiconductor T2Two ends, grid source, metal-oxide-semiconductor T2Conducting,
Cell B2By equalizing resistance R3Shunting, it is achieved equalization discharge.Control unit exports to optocoupler
Continuity signal is pwm signal, adjusts metal-oxide-semiconductor T by the dutycycle controlling pwm signal2Lead
The logical time, thus control cell B2Shunting size, it is achieved Balance route.
Claims (5)
1. a complete compatible electrokinetic cell balancer, including
The power battery pack that multiple cell B are connected into；
Multiple equilibrium branch roads being connected into by equalizing resistance R and switch transistor T, equilibrium branch road is in parallel with cell B；
Multiple equalizer switch U, are controlled by control unit, and the switching tube for described equilibrium branch road accesses power-on；
Control unit, detects the cell needing equilibrium, controls described equalizer switch；
It is characterized in that: the independent described equilibrium branch road in parallel of each cell B, each equilibrium branch road
Switching tube is independent to be controlled by a described equalizer switch U, and described switching tube accesses described by described equalizer switch
Power battery pack, the switch that other cells in addition to power battery pack output head anode cell are corresponding
The power-on of pipe is two series connection cells, and one is the cell that described equalizer switch is corresponding, one
For the high-order cell connected with this cell, the cell of described power battery pack output head anode
The switching tube of equilibrium branch road is provided power-on by external insulating power supply.
One the most according to claim 1 compatible electrokinetic cell balancer entirely, it is characterised in that: described
Equalizer switch is photo-coupler, and described switching tube is field effect transistor, the optocoupler that the cell of described positive pole is corresponding
The colelctor electrode of clutch outfan connects the positive pole of described external insulating power supply, and it is corresponding that emitter stage connects described cell
Fet gate, other photo-coupler output in addition to the photo-coupler that the cell of described positive pole is corresponding
The colelctor electrode of end connects the positive pole of the high-order cell of each self-corresponding cell, and emitter stage connects each self-corresponding
Fet gate.
One the most according to claim 1 compatible electrokinetic cell balancer entirely, it is characterised in that: described
Insulating power supply is single-ended flyback insulating power supply.
4. a complete compatible electrokinetic cell equalization methods, it is characterised in that: power battery pack includes that n is connected
Cell B1、B2…Bn, corresponding each cell Bn, have a switch transistor TnAnd equalizing resistance
RnThe equilibrium branch road of series connection is connected in parallel；Described cell Bm…BnSwitch transistor Tm…TnRespectively by equalizing
Switch Um…UnControl, described cell Bm…BnRespectively by m-1 before each cell and this cell
Individual high-order cell is provided in series the power-on of this cell switching tube, switch transistor T1…Tm-1Unlatching
Power supply is respectively by external insulating power supply V1…Vm-1There is provided.
One the most according to claim 4 compatible electrokinetic cell equalization methods entirely, it is characterised in that: described
Switching tube is field effect transistor, and the voltage of described power-on is 2 times of monomer battery voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110187656.5A CN102231554B (en) | 2011-07-06 | 2011-07-06 | A kind of complete compatible electrokinetic cell balancer and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110187656.5A CN102231554B (en) | 2011-07-06 | 2011-07-06 | A kind of complete compatible electrokinetic cell balancer and method |
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| CN102231554A CN102231554A (en) | 2011-11-02 |
| CN102231554B true CN102231554B (en) | 2016-09-14 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130091951A (en) * | 2012-02-09 | 2013-08-20 | 삼성에스디아이 주식회사 | Battery pack, controlling method of the same, and power storage system including the battery pack |
| CN103887569B (en) * | 2014-04-04 | 2016-01-06 | 淄博贝林电子有限公司 | Motor switch formula automatic equalization battery module |
| CN105375539B (en) * | 2014-08-21 | 2021-02-09 | 上海稳得新能源科技有限公司 | Automatic balance charger for power battery |
| CN106100015B (en) * | 2016-06-13 | 2018-07-31 | 郑州精益达汽车零部件有限公司 | A kind of passive balancing control circuit and control method of vehicle mounted battery management system |
| CN106602664B (en) * | 2017-01-05 | 2024-03-22 | 清华大学深圳研究生院 | Battery pack with dynamically adjustable connection topology and implementation method thereof |
| AU2018432185B2 (en) * | 2018-12-21 | 2021-10-28 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Battery supply circuits, devices to be charged, and charging control methods |
| CN109975714A (en) * | 2019-03-27 | 2019-07-05 | 广西电网有限责任公司防城港供电局 | A kind of voltage check device, detection system and the method for compatible multiple voltage |
| CN111614134B (en) * | 2020-04-23 | 2023-01-10 | 北京欧罗科技发展有限公司 | Battery pack charging control method and system and battery pack charging device |
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| CN101588077A (en) * | 2008-05-21 | 2009-11-25 | 深圳市比克电池有限公司 | Management system of uninterrupted power supply |
| CN201584468U (en) * | 2009-10-15 | 2010-09-15 | 安阳成翔电器有限公司 | Device for controlling equalized-discharge of storage battery |
| CN101986508A (en) * | 2010-12-03 | 2011-03-16 | 安徽力高新能源技术有限公司 | Battery equalizing device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101588077A (en) * | 2008-05-21 | 2009-11-25 | 深圳市比克电池有限公司 | Management system of uninterrupted power supply |
| CN201584468U (en) * | 2009-10-15 | 2010-09-15 | 安阳成翔电器有限公司 | Device for controlling equalized-discharge of storage battery |
| CN101986508A (en) * | 2010-12-03 | 2011-03-16 | 安徽力高新能源技术有限公司 | Battery equalizing device |
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