CN108667058A - A kind of system for chain type energy storage structure that can eliminate secondary pulsation - Google Patents
A kind of system for chain type energy storage structure that can eliminate secondary pulsation Download PDFInfo
- Publication number
- CN108667058A CN108667058A CN201810818688.2A CN201810818688A CN108667058A CN 108667058 A CN108667058 A CN 108667058A CN 201810818688 A CN201810818688 A CN 201810818688A CN 108667058 A CN108667058 A CN 108667058A
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- Prior art keywords
- battery
- bridge
- battery pack
- bridge structure
- energy storage
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of system for chain type energy storage structures that can eliminate secondary pulsation,One group of battery pack B11 is connected an inductance L1 one battery unit of composition in parallel with another group of battery pack B12 progress again,The both ends of battery unit are connected with the both ends of half-bridge structure,There are one MOSFET power tubes S11 respectively on the upper and lower bridge arm of the half-bridge structure,S12,MOSFET power tubes S11,S12 distinguishes anti-paralleled diode D11,D12,By it is multiple be connected with half-bridge structure after battery unit connect,It is connected in parallel with a capacitor C0 after connecting again with an inductance L0,The both ends of capacitance C0 are also respectively connected with the inverter of a half-bridge structure,The invention avoids battery packs to exchange with the DIRECT ENERGY of power grid,So that battery pack is not influenced by secondary pulsation,The equilibrium of each group battery can be realized by relatively simple control method,Extend the service life of battery.
Description
Technical field
The present invention relates to battery system technical field more particularly to a kind of system for chain type energy storage that can eliminate secondary pulsation
Structure.
Background technology
For the system for chain type energy storage based on battery, need to DC side（Battery pack）It realizes effectively grid-connected.It is existing at present
Structure design be broadly divided into two classes, one kind is directly to realize battery pack with inverter cascade grid-connected, and on the one hand this requires electricity
Pond group has higher voltage class, needs a large amount of batteries to connect, influences system reliability, another aspect battery pack and power grid energy
There is secondary pulsating power when exchange, battery life can be endangered, conventional topologies use bulky capacitor in parallel with battery pack secondary to absorb
Pulsation, but very high requirement is proposed for capacitance size.Second class is to cascade battery pack and DC-DC converter, is being passed through
Inverter realization is grid-connected, and inverter used at present and DC-DC converter use are full bridge structures, this needs more
IGBT switching tubes, on the one hand so that control method becomes complicated, on the one hand again so that cost improves.
Invention content
The object of the invention is exactly to provide a kind of chain type storage that can eliminate secondary pulsation to make up the defect of prior art
It can system structure.
The present invention is achieved by the following technical solutions：
A kind of system for chain type energy storage structure that can eliminate secondary pulsation, by one group of battery pack B11 connect an inductance L1 again with
Another group of battery pack B12 carries out one battery unit of composition in parallel, and the both ends of battery unit are connected with the both ends of half-bridge structure,
There are one MOSFET power tubes S11, S12, S11, S12 points of MOSFET power tubes respectively on the upper and lower bridge arm of the half-bridge structure
Other anti-paralleled diode D11, D12, by it is multiple be connected with half-bridge structure after battery unit connect, then with an inductance L0
C0 is connected in parallel with a capacitor after series connection, the both ends of capacitance C0 are also respectively connected with the inverter of a half-bridge structure, carry out grid-connected.When
When the upper half bridge arm switching tube conducting of each battery unit, battery unit accesses whole system, should when half bridge arm is connected instantly
Battery unit is removed, and at this moment, the battery pack in the unit can be carried out balanced by inductance.By to battery pack state-of-charge
（SOC）Monitoring, control each unit upper half bridge arm switching tube switch off time, since switch off time is very short, capacitance both end voltage is not
It can be mutated, may be implemented effectively grid-connected.Simultaneously as battery pack with power grid by carrying out energy friendship again after equivalent BUCK circuits
It changes, secondary pulsation can be filtered out, help to extend battery life.
There are one MOSFET power tubes S1, S2, MOSFET respectively on the upper and lower bridge arm of the inverter of the half-bridge structure
Power tube S1, S2 difference anti-paralleled diode D1, D2.
The present invention proposes a kind of system for chain type energy storage structure that can eliminate secondary pulsation in view of the deficiencies of the prior art,
System for chain type energy storage structure is made of equivalent buck/boost reversible transducers and half-bridge inverter, and battery pack cascades half-bridge structure
DC-DC converter, when upper half bridge arm is connected to the capacitor charging on DC bus.When lower switch pipe is connected, Ge Ge electricity
Pool unit is carried out balanced in unit by inductance, and capacitance on DC bus carries out clamper to DC side output voltage, then with it is inverse
It is grid-connected that change device cascade so that DC side may be implemented.Upper and lower switching tube cut-offs state-of-charge of the control strategy by each group battery pack
（SOC）It determines the equilibrium, it can be achieved that each group battery, further extends the service life of battery pack.
It is an advantage of the invention that：The invention avoids battery packs to exchange with the DIRECT ENERGY of power grid so that battery pack not by
The influence of secondary pulsation；What is used is half-bridge structure so that IGBT switching tube quantity is reduced, and is simplified control method while being dropped
Low cost；The equilibrium that each group battery can be realized by relatively simple control method, extends the service life of battery.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Specific implementation mode
As shown in Figure 1, a kind of system for chain type energy storage structure that can eliminate secondary pulsation, by one group of battery pack B11 series connection
One inductance L1, one battery unit of composition in parallel with another group of battery pack B12 progress again, by the both ends of battery unit and half-bridge
The both ends of structure are connected, and there are one MOSFET power tubes S11, S12, MOSFET respectively on the upper and lower bridge arm of the half-bridge structure
Power tube S11, S12 distinguishes anti-paralleled diode D11, D12, by it is multiple be connected with half-bridge structure after battery unit go here and there
Connection, then be connected in parallel with a capacitor C0 after connecting with an inductance L0, the both ends of capacitance C0 are also respectively connected with half-bridge structure
Inverter carries out grid-connected.When the upper half bridge arm switching tube conducting of each battery unit, battery unit accesses whole system,
Instantly when half bridge arm is connected, which is removed, and at this moment, the battery pack in the unit can be carried out balanced by inductance.
By to battery pack state-of-charge（SOC）Monitoring, control each unit upper half bridge arm switching tube switch off time, due to switch off time
Very short, capacitance both end voltage cannot be mutated, and may be implemented effectively grid-connected.Simultaneously as battery pack by equivalent BUCK circuits it
Energy exchange is carried out with power grid again afterwards, secondary pulsation can be filtered out, helps to extend battery life.
There are one MOSFET power tubes S1, S2, MOSFET respectively on the upper and lower bridge arm of the inverter of the half-bridge structure
Power tube S1, S2 difference anti-paralleled diode D1, D2.
As shown in Figure 1, can eliminate the system for chain type energy storage of secondary pulsation by equivalent buck/boost reversible transducers and
Half-bridge inverter forms, and wherein C0 is storage capacitor, and L0 is energy storage inductor, S1 and the power tube that S2 is half-bridge inverter, C1 and
C2 capacity is equal.Under the working condition that DC side is powered to power grid, bridge arm switching tube S11 on bi-directional DC-DC half-bridge module, under
Bridge arm diode D11 and inductance L0 constitute equivalent buck circuits, give the control letter of half-bridge switch pipe S11, S12 complementation up and down
Number, when upper switch pipe is connected, battery pack will give DC bus C0 chargings, and when lower switch pipe is connected, each battery unit passes through
Inductance carries out equilibrium in unit, and C0 carries out clamper to DC side output voltage so that DC side may be implemented grid-connected.
Claims (2)
1. a kind of system for chain type energy storage structure that can eliminate secondary pulsation, it is characterised in that：By one group of battery pack B11 series connection one
A inductance L1 one battery unit of composition in parallel with another group of battery pack B12 progress again, by the both ends of battery unit and half-bridge knot
The both ends of structure are connected, and there are one MOSFET power tubes S11, S12, MOSFET work(respectively on the upper and lower bridge arm of the half-bridge structure
Rate pipe S11, S12 distinguishes anti-paralleled diode D11, D12, by it is multiple be connected with half-bridge structure after battery unit connect,
C0 is connected in parallel with a capacitor after connecting again with an inductance L0, the both ends of capacitance C0 are also respectively connected with the inversion of a half-bridge structure
Device carries out grid-connected.
2. a kind of system for chain type energy storage structure that can eliminate secondary pulsation according to claim 1, it is characterised in that：Institute
There are one MOSFET power tubes S1, S2, MOSFET power tubes S1, S2 respectively on the upper and lower bridge arm of the inverter for the half-bridge structure stated
Anti-paralleled diode D1, D2 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810818688.2A CN108667058A (en) | 2018-07-24 | 2018-07-24 | A kind of system for chain type energy storage structure that can eliminate secondary pulsation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810818688.2A CN108667058A (en) | 2018-07-24 | 2018-07-24 | A kind of system for chain type energy storage structure that can eliminate secondary pulsation |
Publications (1)
| Publication Number | Publication Date |
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| CN108667058A true CN108667058A (en) | 2018-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810818688.2A Pending CN108667058A (en) | 2018-07-24 | 2018-07-24 | A kind of system for chain type energy storage structure that can eliminate secondary pulsation |
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| CN (1) | CN108667058A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113400959A (en) * | 2021-07-30 | 2021-09-17 | 南通大学 | Electric drive reconstruction type charging system for electric vehicle considering secondary power pulsation suppression |
| CN113437872A (en) * | 2021-06-26 | 2021-09-24 | 中科华士电气科技南京有限公司 | High-frequency auxiliary power supply based on multiple Buck circuits |
| CN114172250A (en) * | 2022-02-11 | 2022-03-11 | 四川大学 | Charging and discharging control circuit and control method for battery pack of electric vehicle |
| CN114189022A (en) * | 2021-12-15 | 2022-03-15 | 傲普(上海)新能源有限公司 | Battery monomer capacitance balance control circuit of parallel battery module |
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| CN113437872A (en) * | 2021-06-26 | 2021-09-24 | 中科华士电气科技南京有限公司 | High-frequency auxiliary power supply based on multiple Buck circuits |
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| CN114172250A (en) * | 2022-02-11 | 2022-03-11 | 四川大学 | Charging and discharging control circuit and control method for battery pack of electric vehicle |
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