CN107294183A - Capacitor-Diodenetwork plurality of voltages balanced device topology and its control method - Google Patents
Capacitor-Diodenetwork plurality of voltages balanced device topology and its control method Download PDFInfo
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- CN107294183A CN107294183A CN201710736626.2A CN201710736626A CN107294183A CN 107294183 A CN107294183 A CN 107294183A CN 201710736626 A CN201710736626 A CN 201710736626A CN 107294183 A CN107294183 A CN 107294183A
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- Prior art keywords
- voltage
- diode
- electric capacity
- battery
- bus
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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
Abstract
The invention discloses a kind of Capacitor-Diodenetwork multichannel cell voltage balanced device topology, the topology is made up of prime DC AC converters, alternating voltage bus, rear class di-cap equalising network and battery pack.By adjusting the voltage magnitude and frequency of alternating voltage bus, the electric voltage equalization of each battery cell in battery pack can be achieved.Scheme is pressed relative to traditional battery, the invention is without a large amount of switching tubes or multiwinding transformer, circuit structure is simple, the features such as with simple, easy extension and small volume is controlled, the independent equilibrium of each battery cell can be achieved in the invention simultaneously, and to need plurality of voltages, application provides a kind of high-performance, the solution of low cost in a balanced way.
Description
Technical field
The present invention relates to lithium battery technology of pressure equalization field, especially electric capacity-diode network plurality of voltages balanced device topology
And its control method.
Background technology
At present, energy crisis is increasingly becoming hot issue of concern with environmental pollution.Protected in energy crisis and environment
Under the dual-pressure of shield, countries in the world are all actively carrying out green energy resource technological development.In the development and application of various green energy resources
In, lithium battery with its specific energy height, memory-less effect, have extended cycle life the advantages of, be widely used in various energy-storage systems.But
Single lithium battery voltage is relatively low, it is necessary to which even up to a hundred battery cells of dozens of are connected in groups to realize High voltage output.Due to
The otherness of the characteristic such as each internal resistance of single cell, leakage current, temperature, easily causes the inequality of battery pack during manufacture and use
Weigh phenomenon, is embodied in and occurs overcharging and cross and putting phenomenon for cell during use, and ultimately results in battery performance
Drastically decline, cycle life shortens.For extension battery pack service life, voltage balance circuit need to be added in battery pack.
Existing battery technology of pressure equalization is basically divided into three classes, i.e., pressed based on high frequency switch power technology, based on more around
Group transformer is pressed and pressed based on voltage multiplier topological structure.Technology of pressure equalization based on high frequency switch power principle can be realized
The high accuracy of each battery cell, independent voltage regulation.But the shortcomings of there is many circuit components, complicated control and high cost in it.
And traditional technology of pressure equalization based on multiwinding transformer, although control is simple, but by volume of transformer, secondary leakage inductance and processing
Technogenic influence, it is more difficult to realize high-precision pressure, not easy care and extended capability is poor.It is existing based on voltage multiplier topological structure
Technology of pressure equalization, it is pressed using electric capacity and diode network, circuit structure and control it is relatively easy, but the technology of pressure equalization without
Method realizes that each battery cell independent pressure, cross influence are serious.
The content of the invention
The circuit topology that the present invention is provided, overcomes the disadvantage mentioned above of existing technology of pressure equalization.
The technical solution adopted by the present invention is：
Electric capacity-diode multichannel cell voltage balanced device topology, by prime DC-AC converters, alternating voltage bus, rear class
Electric capacity-diode equalising network and battery pack are constituted, and prime DC-AC converter output terminals are directly connected with alternating voltage bus
Connect；Be parallel with N number of voltage balancing module simultaneously on alternating voltage bus, each voltage balancing module by two electric capacity and one by
The rectifier bridge of diode composition is constituted, and all N number of voltage balancing modules constitute rear class electric capacity-diode equalising network, each voltage
Balance module output end one battery cell of independent connection, all battery cells are connected in series composition battery pack；Alternating voltage is female
Bus controller is connected with line.
Bus controller realizes that the voltage of each battery cell is equal by adjusting the voltage magnitude and frequency of alternating voltage bus
The conduct current of diode rectifier bridge in weighing apparatus, rear class electric capacity-diode equalising network so that no matter busbar voltage is just or is
Negative, the voltage balancing module in rear class electric capacity-diode equalising network can normal work.
Further, the voltage balancing module in rear class electric capacity-diode equalising network is made up of electric capacity, diode, nothing
Switching device and multiwinding transformer are needed, balanced device volume and control complexity is reduced.Rear class electric capacity-diode is balanced simultaneously
Balance module in network is with parallel way connection and alternating voltage bus, and each battery cell balancing procedure is separate, no friendship
Fork influence, N roads battery voltage balanced can be realized simultaneously, extended capability is strong.
In addition, prime DC-AC converters can be the DC-AC converters of arbitrary topology.
The present invention also aims to there is provided a kind of control of electric capacity-diode network multichannel cell voltage balanced device topology
Method processed：DC voltage is changed into the voltage in alternating voltage, rear class electric capacity-diode equalising network by prime DC-AC converters
Balance module realized by capacitor charge and discharge it is battery balanced, bus controller by adjust alternating voltage bus voltage magnitude and
The conduct current of diode rectifier bridge in the equalizing voltage of each battery cell of FREQUENCY CONTROL, rear class electric capacity-diode equalising network
Property so that no matter busbar voltage is just or is negative, and balance module can normal work.
Compared with prior art, the beneficial effects of the invention are as follows：
First, compared with existing active equalization technology, switching tube quantity needed for the present invention is unrelated with series-connected cell quantity, and
Without multiwinding transformer in equalizing circuit, have the advantages that circuit structure simple, small volume, cost be low, circuit control is simple.
2nd, compared with existing active equalization technology, N number of cell voltage is parallel with simultaneously on alternating voltage bus of the present invention
Balance module, each balance module balancing procedure is separate, no cross influence.By adjusting the amplitude and frequency of busbar voltage i.e.
The electric voltage equalization of each battery cell can be achieved.
3rd, compared with existing active equalization technology, the present invention is achievable many using only a prime DC-AC converter
Road is battery balanced.
Brief description of the drawings
Fig. 1 a are circuit structure diagram of the invention；
Fig. 1 b are voltage balancing module circuit diagram structure of the invention；
Fig. 2 is equivalent circuit diagram of the invention；
Fig. 3 a are operation mode one circuit diagram of the equivalent circuit shown in Fig. 2 a balanced cycle；
Fig. 3 b are operation mode two circuit diagram of the equivalent circuit shown in Fig. 2 a balanced cycle；
Fig. 4 is the balanced equivalent model of the corresponding alternating voltage of circuit topology of the invention；
Fig. 5 is the balanced equivalent model of the corresponding DC voltage of circuit topology of the invention；
Fig. 6 is of the invention using semibridge system DC-AC converters as front stage converter, and the input of semibridge system DC-AC converters is outer
Three battery voltage balanced embodiments of portion's dc source；
Fig. 7 is the busbar voltage waveform and other major experimental waveforms of Fig. 6 embodiments；
Fig. 8 is voltage oscillogram under the battery charging state of Fig. 6 embodiments；
Fig. 9 is of the invention using semibridge system DC-AC converters as front stage converter, and the input of semibridge system DC-AC converters is electricity
Three battery voltage balanced embodiments of pond group itself；
Figure 10 is voltage oscillogram under the battery standing state of Fig. 9 embodiments.
Embodiment
Further detailed description is done to the present invention below by specific example with reference：
Fig. 1 a are system architecture diagram of the invention, as shown in figure 1, the invention utilizes prime DC-AC converters by direct current
Voltage transformation is alternating voltage, and the voltage balancing module in rear class electric capacity-diode network is by electric capacity, diode as shown in Figure 1 b
Composition, the voltage balancing module in rear class electric capacity-diode equalising network realized by capacitor charge and discharge it is battery balanced, electric capacity
Logical to hand over blocking effect, and the rectifier bridge that diode is constituted to have conduct current, it can effectively prevent that voltage balancing module institute is right
Answer battery cell short circuit, while in rear class electric capacity-diode equalising network diode rectifier bridge conduct current so that no matter
Busbar voltage is just or is negative, and balance module can normal work.
As shown in figure 3, when prime DC-AC converters input termination external power source, circuit conditioning process has two mode.
ModeI:Mode one in Fig. 3 a, now prime DC-AC convertor controls Vbus=EA>0, to battery Bi, balanced electricity
Flow through electric capacity Ci1、Ci2, diode Di1、Di2Flow into battery Bi(i=1,2 ..., n), now diode Di3、Di4Reversely cut-off.
ModeII:Mode two in Fig. 3 b, now prime DC-AC convertor controls Vbus=EB<0, to battery Bi, balanced electricity
Flow through electric capacity Ci2、Ci1, diode Di3、Di4Flow into battery Bi(i=1,2 ..., n), now diode Di1、Di2Reversely cut-off.
Known by above-mentioned mode, busbar voltage VbusConstantly in EA、EBChecker, V between two voltagesbusOne can be equivalent to
It is individual to carry direct current biasing VdcSymmetrical alternating current voltage source Vac.Wherein Vdc=(EA+EB)/2, Vac=(EA—EB)/2.Due to electric capacity
Logical friendship blocking effect, DC offset voltage VdcOnly influence capacitance voltage, only symmetrical alternating current voltage source V in balance moduleacShadow
Ring balancing procedure.Therefore the battery voltage balanced of Capacitor-Diodenetwork multichannel shown in Fig. 1 topology can be equivalent to exchange equilibrium shown in Fig. 4
Model, while it can be equivalent to direct current equilibrium model shown in Fig. 5.All battery cell B in Fig. 4, Fig. 5, battery packi(i
=1,2 ..., it is n) final all by equilibrium to voltage (EA—EB)/2。
Fig. 7 and Fig. 8 is the corresponding equalized waveform of Fig. 6 embodiments, initial voltage of battery VB1=3.22V, VB2=3.32V, VB3
=3.56V, VB4=3.60V, ac bus voltage VbusFor ac square-wave voltage, its amplitude is 3.65V.Known by Fig. 7 and Fig. 8, to the greatest extent
Pipe initial voltage of battery is different, but continuing with charging process, and the balanced device realizes the battery voltage balanced of battery pack, and
Remain that voltage more battery cell charging current is bigger.
Figure 10 is the corresponding equalized waveform of Fig. 9 embodiments, and prime DC-AC converter input energy is carried by battery pack itself
For, known by Figure 10, under battery standing state, Fig. 9 embodiments provide power supply without outside, can voluntarily realize electric voltage equalization, therefore
It can realize balanced under battery pack charging, electric discharge and static condition.
To sum up, a kind of Capacitor-Diodenetwork multichannel battery voltage balanced proposed by the invention topology, simple in construction, work
Make efficiency high, no matter and battery pack in charging, electric discharge or static condition, balanced device can quickly realize that battery cell voltage is equal
Weighing apparatus.
Claims (2)
1. electric capacity-diode network plurality of voltages balanced device topology, it is characterised in that including prime DC-AC converters, alternating current
Press bus, rear class electric capacity-diode equalising network and battery pack；The output end of prime DC-AC converters and alternating voltage bus
It is connected；N number of voltage balancing module is parallel with alternating voltage bus simultaneously, described voltage balancing module includes two electric capacity
With a rectifier bridge being constituted by a diode；N number of voltage balancing module constitutes rear class electric capacity-diode equalising network, each voltage
Balance module output end one battery cell of independent connection, all battery cells are connected in series composition battery pack；Alternating voltage is female
Bus controller is connected with line.
2. the control method of electric capacity according to claim 1-diode network multichannel cell voltage balanced device topology, it is special
Levy and be, DC voltage is changed into the voltage in alternating voltage, rear class electric capacity-diode equalising network by prime DC-AC converters
Balance module realized by capacitor charge and discharge it is battery balanced, bus controller by adjust alternating voltage bus voltage magnitude and
The conduct current of diode rectifier bridge in the equalizing voltage of each battery cell of FREQUENCY CONTROL, rear class electric capacity-diode equalising network
Property so that no matter busbar voltage is just or is negative, and balance module can normal work.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710736626.2A CN107294183A (en) | 2017-08-24 | 2017-08-24 | Capacitor-Diodenetwork plurality of voltages balanced device topology and its control method |
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| CN201710736626.2A CN107294183A (en) | 2017-08-24 | 2017-08-24 | Capacitor-Diodenetwork plurality of voltages balanced device topology and its control method |
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| CN201710736626.2A Pending CN107294183A (en) | 2017-08-24 | 2017-08-24 | Capacitor-Diodenetwork plurality of voltages balanced device topology and its control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088465A (en) * | 2018-10-29 | 2018-12-25 | 河北工业大学 | A kind of battery/super capacitor automatically equalizing voltage charging circuit |
| CN110912235A (en) * | 2019-12-13 | 2020-03-24 | 阳光电源股份有限公司 | Energy storage system and current equalizing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007147660A1 (en) * | 2006-06-21 | 2007-12-27 | Continental Automotive Gmbh | Device and method for charging an energy store |
| CN101164215A (en) * | 2005-03-24 | 2008-04-16 | 西门子威迪欧汽车电子股份公司 | Device and method for equalizing charge of series-connected individual cells of an energy accumulator |
| US20090067200A1 (en) * | 2004-06-28 | 2009-03-12 | Siemens Aktiengesellschaft | Device and method for equalizing the charges of individual, series-connected cells of an energy storage device |
| CN207098709U (en) * | 2017-08-24 | 2018-03-13 | 西南交通大学 | Capacitor-Diodenetwork plurality of voltages balanced device topology |
-
2017
- 2017-08-24 CN CN201710736626.2A patent/CN107294183A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090067200A1 (en) * | 2004-06-28 | 2009-03-12 | Siemens Aktiengesellschaft | Device and method for equalizing the charges of individual, series-connected cells of an energy storage device |
| CN101164215A (en) * | 2005-03-24 | 2008-04-16 | 西门子威迪欧汽车电子股份公司 | Device and method for equalizing charge of series-connected individual cells of an energy accumulator |
| WO2007147660A1 (en) * | 2006-06-21 | 2007-12-27 | Continental Automotive Gmbh | Device and method for charging an energy store |
| CN207098709U (en) * | 2017-08-24 | 2018-03-13 | 西南交通大学 | Capacitor-Diodenetwork plurality of voltages balanced device topology |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088465A (en) * | 2018-10-29 | 2018-12-25 | 河北工业大学 | A kind of battery/super capacitor automatically equalizing voltage charging circuit |
| CN110912235A (en) * | 2019-12-13 | 2020-03-24 | 阳光电源股份有限公司 | Energy storage system and current equalizing method thereof |
| CN110912235B (en) * | 2019-12-13 | 2021-11-02 | 阳光电源股份有限公司 | Energy storage system and current equalizing method thereof |
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Application publication date: 20171024 |