CN203800680U - Large power bidirectional deflector capable of supporting access of multiple cell groups - Google Patents
Large power bidirectional deflector capable of supporting access of multiple cell groups Download PDFInfo
- Publication number
- CN203800680U CN203800680U CN201420235503.2U CN201420235503U CN203800680U CN 203800680 U CN203800680 U CN 203800680U CN 201420235503 U CN201420235503 U CN 201420235503U CN 203800680 U CN203800680 U CN 203800680U
- Authority
- CN
- China
- Prior art keywords
- bidirectional
- way
- converter
- bus
- large power
- 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.)
- Expired - Lifetime
Links
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 25
- 238000007599 discharging Methods 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 abstract 5
- 210000004460 N cell Anatomy 0.000 abstract 1
- 238000004146 energy storage Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a large power bidirectional deflector capable of supporting access of multiple cell groups. According to the large power bidirectional deflector, one side of each independent bidirectional DC/DC converter unit is connected with input of one cell group, the other side of each independent bidirectional DC/DC converter unit is connected with a DC bus of a separate bidirectional DC/AC converter, one end of the separate bidirectional DC/AC converter is connected with an electrical network, the other end of the separate bidirectional DC/AC converter is connected with the DC bus, N cell groups correspond to N independent bidirectional DC/DC converter units, and the N is an integer greater than or equal to 1. The large power bidirectional deflector provides independent bidirectional DC/DC converters connected with the DC bus at an inner portion for each set of cell input, can satisfy different charging/discharging requirements of each cell set and avoids a circulation phenomenon caused by parallel connection of the cell sets; energy exchange between the DC bus and the electrical network is realized through a centralized bidirectional DC/AC grid connected current transformer; the large power bidirectional deflector has advantages of compact structure, high cost performance and strong practicality.
Description
Technical field
The utility model relates to a kind of great power bidirectional convertor assembly that meets many Battery packs group and independently discharge and recharge requirement, is specially adapted to liquid stream, sodium-sulfur battery energy storage system that monomer capacity is lower.
Background technology
Increasingly the deterioration of the day by day deficient and environment of traditional energy, has greatly promoted New Energy Industry development in the world, and the scale of generation of electricity by new energy is also soaring fast.But there is the problem such as unsteadiness and intermittence in generation of electricity by new energy, extensive grid-connected meeting impacts the stable operation of electrical network.Therefore the large-scale development of renewable energy power generation must rely on advanced energy storage technology to realize the function of the peak load that disappears, level and smooth power fluctuation, thereby meets electrical network access requirement.
The key equipment of battery energy storage technology mainly comprises battery and management system thereof, two parts of bidirectional energy-storage convertor assembly.The energy-storage battery of comparative maturity has lithium battery, flow battery, sodium-sulphur battery, super capacitor etc. at present.The monomer energy of this class battery, output voltage are limited, in hicap application, need by series and parallel group string to improve electric pressure or single-machine capacity.But in large capacity energy-storage system due to the property difference of the cell self in group string, cause state-of-charge between each battery pack (SOC) and charging/discharging voltage to occur inconsistence problems, between battery pack, there is circulation, overcharge/cross and put phenomenon, have a strong impact on battery life.As every Battery pack being all equipped with to the two way convertor of low capacity, reasonably discharge and recharge requirement though be conducive to reach every Battery pack, certainly will cause inverter waste of capacity, system cost is high, volume weight is large.
Utility model content
Providing a kind of for above problem the utility model supports the access of many Battery packs and meets each Battery pack independently to discharge and recharge requirement, great power bidirectional convertor assembly that cost performance is higher.
Provide a kind of great power bidirectional convertor assembly of supporting many Battery pack accesses in order to overcome the above problems the utility model, it is characterized in that: comprise N independently two-way DC/DC power converter cells, single two-way DC/AC current transformer;
Each independently two-way DC/DC power converter cells one side is connected with a battery pack input respectively, and opposite side is connected with the DC bus of single two-way DC/AC current transformer;
One end of single two-way DC/AC current transformer is connected with electrical network, and the other end is connected with DC bus;
N the individual independently two-way DC/DC power converter cells of the corresponding N of battery pack, N is more than or equal to 1 integer;
This device main circuit topology is the two-step scheme of " N+1 ", provide independently two-way DC/DC converter to be connected on the inner DC bus of device to every Battery pack input, can meet each Battery pack different discharge and recharge requirement, the circulation phenomenon of avoiding battery pack parallel connection to cause; Realize the energy exchange between DC bus and electrical network by a concentrated two-way DC/AC grid-connected converter, single unit system structure is connect gather, cost performance is high, practical.
Described two-way DC/AC current transformer is made up of three-phase half-bridge circuit, filter, transformer; Three-phase half-bridge circuit, by filter, the isolating transformer stable DC busbar voltage that was connected with electrical network, to electrical network or load, is realized the centralized control of energy by feedback/absorption power conversion total battery pack.
Described each two-way DC/DC power converter cells is made up of two inductance and two half-bridge circuits, and one end of two inductance is connected in parallel and is connected with dc-battery by switch, and the other end of two inductance is connected to the mid point of two half-bridge circuits.Half-bridge structure provides bidirectional energy circulation passage, inductance provides boost no-load voltage ratio and the filter function of converter unit, under the cell voltage input that makes thus described two-way DC/DC power converter cells independently change at wide region, works in the mode of operations such as constant current, permanent power, floating charge.
The utility model is a kind of great power bidirectional convertor assembly of supporting many Battery pack accesses, what can meet many group wide-voltage range battery pack in large capacity energy storage conversion independently discharges and recharges requirement simultaneously, strengthen the fitness of energy storage convertor assembly to different battery behaviors, be easy to realize System Expansion, especially avoided the circulation problem occurring in extensive battery energy storage system application.Compared with the bidirectional energy-storage current transformer topology of inputting with single group direct current, capacity, volume, the weight of net side converter are effectively reduced, reduce system hardware cost, can provide wider use flexibility simultaneously, more easily meet the application requirements of large capacity energy-storage system, improve system reliability, there is very high practical value.
Brief description of the drawings
Fig. 1 is the utility model system block diagram.
Fig. 2 is the two-way DC/AC converter circuit of the utility model schematic diagram.
Fig. 3 is the two-way DC/DC power converter cells of the utility model circuit diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, the utility model provides a kind of great power bidirectional convertor assembly of supporting many Battery pack accesses, it is characterized in that: comprise N independently two-way DC/DC converter, single two-way DC/AC current transformer
;
Each independently two-way DC/DC converter one side is connected with a battery pack input respectively, and opposite side is connected with the DC bus of single two-way DC/AC current transformer;
One end of single two-way DC/AC current transformer is connected with electrical network, and the other end is connected with DC bus;
N the individual independently two-way DC/DC power converter cells of the corresponding N of battery pack, N is more than or equal to 1 integer;
This device main circuit topology is the two-step scheme of " N+1 ", provide independently two-way DC/DC converter to be connected on the inner DC bus of device to every Battery pack input, can meet each Battery pack different discharge and recharge requirement, the circulation phenomenon of avoiding battery pack parallel connection to cause; Realize the energy exchange between DC bus and electrical network by a concentrated two-way DC/AC grid-connected converter, single unit system structure is connect gather, cost performance is high, practical.
Described two-way DC/AC current transformer is made up of three-phase half-bridge circuit, filter, transformer; Three-phase half-bridge circuit, by filter, the isolating transformer stable DC busbar voltage that was connected with electrical network, to electrical network or load, is realized the centralized control of energy by feedback/absorption power conversion total battery pack.
Described each two-way DC/DC power converter cells is made up of two inductance and two half-bridge circuits, and one end of two inductance is connected in parallel and is connected with dc-battery by switch, and the other end of two inductance is connected to the mid point of two half-bridge circuits.Half-bridge brachium pontis quantity can be adjusted according to capacity, and each brachium pontis mid point is connected with cell input terminal by filter reactor.DC/DC power cell adopts current closed-loop control on control strategy, and what issue according to master controller discharges and recharges direction and power requirement, toward DC bus feedback or absorb energy.In the time that battery charges, converter is with Buck work pattern; In the time of battery discharge, converter is with Boost work pattern.In addition, the topological structure of two half-bridge parallel connections can adopt alternating expression control mode, reduces the current ripples of the total output of DC side, and effectively reduces the requirement of filter inductance volume weight.
The foregoing is only preferred embodiment of the present utility model, be not restricted to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present utility model.
Claims (3)
1. a great power bidirectional convertor assembly of supporting many Battery pack accesses, is characterized in that: comprise N independently two-way DC/DC power converter cells, single two-way DC/AC current transformer; Each independently two-way DC/DC power converter cells one side is connected with a battery pack input respectively, and opposite side is connected with the DC bus of single two-way DC/AC current transformer; One end of single two-way DC/AC current transformer is connected with electrical network, and the other end is connected with DC bus; N the individual independently two-way DC/DC power converter cells of the corresponding N of battery pack, N is more than or equal to 1 integer.
2. a kind of great power bidirectional convertor assembly of supporting many Battery pack accesses according to claim 1, is characterized in that: described two-way DC/AC current transformer is made up of three-phase half-bridge circuit, filter, transformer; Three-phase half-bridge circuit is connected with electrical network by filter, isolating transformer
.
3. a kind of great power bidirectional convertor assembly of supporting many Battery pack accesses according to claim 1, it is characterized in that: described each two-way DC/DC converter is made up of two inductance and two half-bridge circuits, one end of two inductance is connected in parallel and is connected with dc-battery by switch, and the other end of two inductance is connected to the mid point of two half-bridge circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235503.2U CN203800680U (en) | 2014-05-08 | 2014-05-08 | Large power bidirectional deflector capable of supporting access of multiple cell groups |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420235503.2U CN203800680U (en) | 2014-05-08 | 2014-05-08 | Large power bidirectional deflector capable of supporting access of multiple cell groups |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203800680U true CN203800680U (en) | 2014-08-27 |
Family
ID=51382868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420235503.2U Expired - Lifetime CN203800680U (en) | 2014-05-08 | 2014-05-08 | Large power bidirectional deflector capable of supporting access of multiple cell groups |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203800680U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852444A (en) * | 2015-05-05 | 2015-08-19 | 深圳晶福源科技股份有限公司 | DC charging device for electric automobiles |
| CN105161773A (en) * | 2015-09-11 | 2015-12-16 | 大英德创精工设备有限公司 | Positive and negative pulse lead-acid cell formation device |
| CN106972602A (en) * | 2017-05-05 | 2017-07-21 | 江苏金帆电源科技有限公司 | A kind of charge-discharge circuit and method based on half-bridge structure |
| CN107431373A (en) * | 2015-04-03 | 2017-12-01 | 施耐德电气It公司 | Adaptive battery group |
| CN107499165A (en) * | 2017-09-01 | 2017-12-22 | 北京友信宏科电子科技股份有限公司 | A kind of vehicle-mounted All-in-One control device and system based on cascade magnetic coupling technology |
| CN108599580A (en) * | 2018-06-06 | 2018-09-28 | 三峡大学 | A kind of adjustable high boosting isolated form DC/DC converters of bridge arm number |
| CN108809095A (en) * | 2018-06-01 | 2018-11-13 | 深圳市瑞能实业股份有限公司 | A kind of two-way ac-dc conversion circuit and device applied to three-phase AC grid |
| CN112072680A (en) * | 2019-06-11 | 2020-12-11 | 许继集团有限公司 | Energy storage converter |
| CN114530898A (en) * | 2020-11-09 | 2022-05-24 | 南京中兴软件有限责任公司 | Power management device, power supply control method, and storage medium |
-
2014
- 2014-05-08 CN CN201420235503.2U patent/CN203800680U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107431373A (en) * | 2015-04-03 | 2017-12-01 | 施耐德电气It公司 | Adaptive battery group |
| CN107431373B (en) * | 2015-04-03 | 2022-05-03 | 施耐德电气It公司 | Self-adaptive battery pack |
| CN104852444A (en) * | 2015-05-05 | 2015-08-19 | 深圳晶福源科技股份有限公司 | DC charging device for electric automobiles |
| CN105161773A (en) * | 2015-09-11 | 2015-12-16 | 大英德创精工设备有限公司 | Positive and negative pulse lead-acid cell formation device |
| CN106972602A (en) * | 2017-05-05 | 2017-07-21 | 江苏金帆电源科技有限公司 | A kind of charge-discharge circuit and method based on half-bridge structure |
| CN107499165A (en) * | 2017-09-01 | 2017-12-22 | 北京友信宏科电子科技股份有限公司 | A kind of vehicle-mounted All-in-One control device and system based on cascade magnetic coupling technology |
| CN108809095A (en) * | 2018-06-01 | 2018-11-13 | 深圳市瑞能实业股份有限公司 | A kind of two-way ac-dc conversion circuit and device applied to three-phase AC grid |
| CN108599580A (en) * | 2018-06-06 | 2018-09-28 | 三峡大学 | A kind of adjustable high boosting isolated form DC/DC converters of bridge arm number |
| CN108599580B (en) * | 2018-06-06 | 2023-10-27 | 三峡大学 | Bridge arm number adjustable high-boost isolation type DC/DC converter |
| CN112072680A (en) * | 2019-06-11 | 2020-12-11 | 许继集团有限公司 | Energy storage converter |
| CN114530898A (en) * | 2020-11-09 | 2022-05-24 | 南京中兴软件有限责任公司 | Power management device, power supply control method, and storage medium |
| CN114530898B (en) * | 2020-11-09 | 2023-11-28 | 南京中兴软件有限责任公司 | Power management apparatus, power supply control method, and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203800680U (en) | Large power bidirectional deflector capable of supporting access of multiple cell groups | |
| CN104426157B (en) | Energy storage module and energy storage device | |
| CN206211639U (en) | A kind of composite energy storing device for being applied to electric automobile | |
| CN106787707A (en) | Embedded accumulation energy type multimode tandem photovoltaic DC booster converter and application process | |
| CN102969730B (en) | A kind of control method of double stage chain type energy storage converter | |
| CN102013691A (en) | Battery energy storage topology structure without transformer based on MMC modularized multi-level inverter | |
| CN102122826A (en) | Energy storage bidirectional current converter for high-capacity storage battery | |
| CN103595063A (en) | Energy storage converter and battery energy storage system of energy storage converter | |
| CN102916435B (en) | A kind of battery energy storage power conversion system containing Z source network and control method thereof | |
| CN106877368A (en) | A kind of photovoltaic generation micro-grid system hybrid energy-storing control method | |
| CN112072716A (en) | Power distribution network terminal electric energy router and control method thereof | |
| CN102983563A (en) | Coordination control method for common direct current bus mixing energy storage systems | |
| CN207705800U (en) | A kind of system for chain type energy storage for stabilizing ability with power of battery fluctuation | |
| CN203251228U (en) | Bidirectional energy storage converter | |
| CN103457271A (en) | Chained static synchronous compensator with active power adjusting capacity and cascading unit thereof | |
| CN104269875A (en) | Hybrid energy storage topological structure on basis of MMC modular multilevel converter | |
| CN103915856A (en) | Base station grid connected-charging photovoltaic micro-inverter system and control method thereof | |
| CN103606998A (en) | Cell voltage equalizing control method using dynamic reference | |
| CN105356774A (en) | Converter used for hybrid energy storage system | |
| CN204376517U (en) | A kind of bidirectional DC-DC converter for direct current network energy storage | |
| CN105552944A (en) | Network system comprising energy storage and energy router and energy adjustment method | |
| CN102969917A (en) | Two-way buck-boost direct current (DC) converter applied to energy storage system | |
| CN102013690A (en) | MMC (multimedia controller)-based modular multi-level transformerless inductive energy storage topological structure | |
| CN103199630A (en) | High-capacity medium voltage battery energy storage system | |
| CN203180545U (en) | Energy storage deflector for liquid flow battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |