CN207098709U - Capacitor-Diodenetwork plurality of voltages balanced device topology - Google Patents
Capacitor-Diodenetwork plurality of voltages balanced device topology Download PDFInfo
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- CN207098709U CN207098709U CN201721068082.9U CN201721068082U CN207098709U CN 207098709 U CN207098709 U CN 207098709U CN 201721068082 U CN201721068082 U CN 201721068082U CN 207098709 U CN207098709 U CN 207098709U
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Abstract
The utility model 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 utility model is without a large amount of switching tubes or multiwinding transformer, circuit structure is simple, have the characteristics that to control simple, easy extension and small volume, the utility model can realize that each battery cell is independent balanced simultaneously, and the application to need plurality of voltages balanced provides a kind of high-performance, the solution of low cost.
Description
Technical field
It the utility model is related to lithium battery technology of pressure equalization field, especially electric capacity-diode network plurality of voltages balanced device
Topology.
Background technology
At present, energy crisis has become 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, memory-less effect higher than energy, have extended cycle life the advantages that, be widely used in various energy-storage systems.But
Single lithium battery voltage is relatively low, it is necessary to which dozens of individual battery cells even up to a hundred 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 during manufacture and use, easily cause the inequality of battery pack
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.To extend 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 there is the shortcomings of circuit components are more, control complexity and cost is high in it.
And traditional technology of pressure equalization based on multiwinding transformer, although control is simple, 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.
Utility model content
Circuit topology provided by the utility model, overcome the disadvantage mentioned above of existing technology of pressure equalization.
The technical solution adopted in the utility model 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 formed, 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 formed, and all N number of voltage balancing modules form 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 the voltage magnitude and frequency that adjust alternating voltage bus
Weigh, the conduct current of diode rectifier bridge in 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, reduces balanced device volume and control complexity.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 influences, and can realize N roads battery voltage balanced simultaneously, and extended capability is strong.
In addition, prime DC-AC converters can be the DC-AC converters of arbitrary topology.
The purpose of this utility model also resides in, there is provided a kind of electric capacity-diode network multichannel cell voltage balanced device topology
Control method：DC voltage is changed into alternating voltage by prime DC-AC converters, in rear class electric capacity-diode equalising network
Voltage balancing module is realized battery balanced by capacitor charge and discharge, and bus controller is by adjusting the voltage amplitude of alternating voltage bus
The equalizing voltage of value and each battery cell of FREQUENCY CONTROL, the electric current of diode rectifier bridge in rear class electric capacity-diode equalising network
Guidance quality 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 utility model are：
First, compared with existing active equalization technology, switching tube quantity needed for the utility model and series-connected cell quantity without
Close, and without multiwinding transformer in equalizing circuit, it is excellent to have that simple circuit structure, small volume, cost are low, circuit control is simple etc.
Point.
2nd, compared with existing active equalization technology, N number of battery is parallel with simultaneously on the utility model alternating voltage bus
Voltage balancing module, each balance module balancing procedure is separate, no cross influence.By the amplitude and frequency that adjust busbar voltage
Rate is that the electric voltage equalization of each battery cell can be achieved.
3rd, compared with existing active equalization technology, the utility model can be real using only a prime DC-AC converter
Existing multichannel is battery balanced.
Brief description of the drawings
Fig. 1 a are circuit structure diagram of the present utility model；
Fig. 1 b are voltage balancing module circuit diagram structure of the present utility model；
Fig. 2 is equivalent circuit diagram of the present utility model；
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 alternating voltage equilibrium equivalent model corresponding to circuit topology of the present utility model；
Fig. 5 is DC voltage equilibrium equivalent model corresponding to circuit topology of the present utility model；
Fig. 6 be the utility model using semibridge system DC-AC converters as front stage converter, semibridge system DC-AC converters input
For three battery voltage balanced embodiments of external dc power；
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 be the utility model using semibridge system DC-AC converters as front stage converter, semibridge system DC-AC converters input
For three battery voltage balanced embodiments of battery pack itself；
Figure 10 is voltage oscillogram under the battery standing state of Fig. 9 embodiments.
Embodiment
Further detailed description is done to the utility model below by specific example with reference：
Fig. 1 a are system architecture diagram of the present utility model, as shown in figure 1, the utility model is converted using prime DC-AC
DC voltage conversion is alternating voltage by device, and the voltage balancing module in rear class electric capacity-diode network is by electricity as shown in Figure 1 b
Hold, diode composition, the voltage balancing module in rear class electric capacity-diode equalising network realizes that battery is equal by capacitor charge and discharge
Weighing apparatus, the logical friendship blocking effect of electric capacity, and the rectifier bridge that diode is formed have conduct current, and it can effectively prevent electric voltage equalization
Corresponding to module 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, 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 between two voltages, VbusOne 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
It is logical to hand over blocking effect, DC offset voltage VdcOnly influence capacitance voltage, only symmetrical alternating current voltage source V in balance moduleacInfluence
Balancing procedure.Therefore the battery voltage balanced of Capacitor-Diodenetwork multichannel shown in Fig. 1 topology can be equivalent to exchange equilibrium model shown in Fig. 4
Type, while it can be equivalent to direct current equilibrium model shown in Fig. 5.From Fig. 4, Fig. 5, all battery cell B in battery packi(i=
1,2 ..., n) it is final all by equilibrium to voltage (EA—EB)/2。
Fig. 7 and Fig. 8 is equalized waveform corresponding to 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 continues 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 equalized waveform corresponding to 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 topology that the utility model is proposed, structure letter
Single, operating efficiency is high, no matter and battery pack can quickly realize battery cell in charging, electric discharge or static condition, balanced device
Electric voltage equalization.
Claims (1)
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 simultaneously on alternating voltage bus, described voltage balancing module includes two electric capacity
With a rectifier bridge being constituted by a diode；N number of voltage balancing module forms 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721068082.9U CN207098709U (en) | 2017-08-24 | 2017-08-24 | Capacitor-Diodenetwork plurality of voltages balanced device topology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721068082.9U CN207098709U (en) | 2017-08-24 | 2017-08-24 | Capacitor-Diodenetwork plurality of voltages balanced device topology |
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| CN207098709U true CN207098709U (en) | 2018-03-13 |
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| CN201721068082.9U Expired - Fee Related CN207098709U (en) | 2017-08-24 | 2017-08-24 | Capacitor-Diodenetwork plurality of voltages balanced device topology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294183A (en) * | 2017-08-24 | 2017-10-24 | 西南交通大学 | Capacitor-Diodenetwork plurality of voltages balanced device topology and its control method |
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2017
- 2017-08-24 CN CN201721068082.9U patent/CN207098709U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294183A (en) * | 2017-08-24 | 2017-10-24 | 西南交通大学 | Capacitor-Diodenetwork plurality of voltages balanced device topology and its control method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180313 Termination date: 20200824 |