CN110299734A - Energy-storage system and the method for carrying out energy storage using echelon battery pack - Google Patents
Energy-storage system and the method for carrying out energy storage using echelon battery pack Download PDFInfo
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- CN110299734A CN110299734A CN201810246436.7A CN201810246436A CN110299734A CN 110299734 A CN110299734 A CN 110299734A CN 201810246436 A CN201810246436 A CN 201810246436A CN 110299734 A CN110299734 A CN 110299734A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000009466 transformation Effects 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims description 59
- 238000013461 design Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- H02J7/0022—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
This disclosure relates to which a kind of energy-storage system and the method for carrying out energy storage using echelon battery pack, belong to energy field, can increase again the flexibility ratio that echelon utilizes, increase the flexible design degree of energy-storage system, and can satisfy the different demands of different clients.The energy-storage system includes at least two series arms, the series arm includes the echelon battery pack being used directly and voltage transformation module, the echelon battery pack being used directly and the voltage transformation module are connected in series, and at least two series arm is in parallel；The voltage transformation module is used to the voltage for the echelon battery pack of series connection with it being used directly being converted into predeterminated voltage, and the predeterminated voltage of all series arms is identical.
Description
Technical field
This disclosure relates to energy field, and in particular, to a kind of energy-storage system and carry out energy storage using echelon battery pack
Method.
Background technique
Currently, the power battery pack got off retired on electric car again echelon is used energy-accumulating power station etc.
It when requiring power battery pack in relatively low occasion, needs to disassemble retired power battery pack, also i.e. by power
Power battery submodule group and battery management unit in battery pack decouple, and then carry out to the power battery submodule group decoupled
Individually test, screening, match with by power battery submodule group similar in battery status parameter (capacity, voltage etc.) again group
At battery pile, then the energy-storage system by the battery pile of reformulation applied to energy-accumulating power station, the energy as the energy-storage system store up
Standby unit.The processing moreover, battery management unit dismantled can be eliminated, and need to the battery pile using reformulation
Energy-storage system in battery management unit carry out redesign exploitation, manufacture and matching.Therefore, existing echelon again utilizes
Scheme increases labour and cost.
Summary of the invention
Purpose of this disclosure is to provide a kind of energy-storage systems and the method for carrying out energy storage using echelon battery pack, can overcome
Defect present in the existing Utilization plan of echelon again.
To achieve the goals above, the disclosure provides a kind of energy-storage system, which includes at least two series connection branch
Road, the series arm include the echelon battery pack being used directly and voltage transformation module, the echelon being used directly
Battery pack and the voltage transformation module are connected in series, and at least two series arm is in parallel；The voltage transformation module is used
In the voltage for the echelon battery pack of series connection with it being used directly is converted into predeterminated voltage, all series arms it is pre-
If voltage is identical.
Optionally, the voltage transformation module be DC/DC conversion module, one end of the DC/DC conversion module with it is described
The echelon battery pack being used directly is electrically connected, the other end exports the predeterminated voltage；The energy-storage system further includes successively going here and there
DC/AC conversion module, switchgear and the transformer of connection, one end of the DC/AC conversion module and the DC/DC conversion module
One end electrical connection of the predeterminated voltage is exported, one end of the other end and the switchgear of the DC/AC conversion module is electrically connected
It connects, the other end of the switchgear is electrically connected with the transformer.
Optionally, the DC/DC conversion module is two-way DC/DC conversion module, is also used to input to the energy storage system
The charging voltage of system is converted into being suitble to give the voltage of its concatenated echelon battery pack charging being used directly.
Optionally, the DC/DC conversion module is electrically connected by dc bus with the DC/AC conversion module.
Optionally, the DC/AC conversion module is two-way DC/AC conversion module.
Optionally, the voltage transformation module is two-way Vehicular charger, one end of the two-way Vehicular charger and institute
State the echelon battery pack electrical connection being used directly, the other end exports the predeterminated voltage；The energy-storage system further includes successively
The output predeterminated voltage of concatenated switchgear and transformer, one end of the switchgear and the two-way Vehicular charger
One end electrical connection, the other end of the switchgear are electrically connected with the transformer.
Optionally, the two-way Vehicular charger is electrically connected by AC bus with the switchgear.
Optionally, the switchgear for realizing during the energy-storage system charge and discharge relay protection and electric quantity metering.
Optionally, the switchgear is low-tension switch cabinet.
Optionally, the echelon battery pack being used directly includes battery control unit, multiple power battery submodule groups
With multiple battery management units, the multiple power battery submodule group and the multiple battery management unit are corresponded, described
For being managed to corresponding power battery submodule group, the battery control unit is used for described battery management unit
The echelon battery pack being used directly is managed.
The disclosure also provides a kind of method for carrying out energy storage using echelon battery pack, this method comprises:
In at least two series arms in parallel, the voltage transformation module in each series arm is received with a string
Join the voltage signal of the echelon battery pack of series connection with it being used directly in branch；And
The voltage signal received is converted into predeterminated voltage by the voltage transformation module, wherein all series arms
Predeterminated voltage it is identical.
By using above-mentioned technical proposal, since the voltage of each echelon battery pack can be by energy storage system discharges
Voltage transformation module is converted into identical predeterminated voltage, so according to the energy-storage system of the embodiment of the present disclosure to being used directly
The ununified requirement of the battery status parameters such as voltage, capacity, the electricity of echelon battery pack, does not need each be used directly yet
Echelon battery pack battery status parameter it is close, namely even if the battery status of each echelon battery pack being used directly is joined
Number is inconsistent, and the voltage of each echelon battery pack also can be by carry out consistency adjustment so that the voltage of all echelon battery packs
It is converted into identical predeterminated voltage, which greatly increases the flexibility ratios that echelon again utilizes, and increase energy-storage system
Flexible design degree, and can satisfy the different demands of different clients.In addition, due in the energy-storage system according to the embodiment of the present disclosure
Echelon battery pack be used directly, so this saves the costs that echelon again utilizes for compared with the prior art
And labour, screening difficulty is reduced, economic results in society are improved, and also retains the cell tube in original echelon battery pack
In addition reason system can also provide diversification and match so that not needing development and application again in the battery management system of energy-storage system
The energy-storage system set copes with the different market demand and network voltage, and the market competitiveness and the client for improving energy storaging product are full
Meaning degree.
Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings:
Fig. 1 is according to a kind of schematic block diagram of the energy-storage system of embodiment of the disclosure；
Fig. 2 is according to a kind of another schematic block diagram of the energy-storage system of embodiment of the disclosure；
Fig. 3 is according to a kind of another schematic block diagram of the energy-storage system of embodiment of the disclosure；
Fig. 4 is the flow chart according to a kind of method for carrying out energy storage using echelon battery pack of embodiment of the disclosure.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched
The specific embodiment stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
According to a kind of embodiment of the disclosure, a kind of energy-storage system is provided, as shown in Figure 1, the energy-storage system 1 includes at least
Two series arms 11, the series arm 11 include the echelon battery pack 100 being used directly and voltage transformation module 110,
The echelon battery pack 100 being used directly and the voltage transformation module 110 are connected in series, at least two series connection branch
Road 11 is in parallel；The voltage transformation module 110 is used to turn the voltage for the echelon battery pack 100 of series connection with it being used directly
Change predeterminated voltage into, the predeterminated voltage of all series arms 11 is identical.
In the disclosure, the meaning of wording " echelon battery pack " is primarily referred to as the upper retired power electric to get off such as electric car
Chi Bao, the meaning of wording " being used directly " are primarily referred to as not passing through from the upper retired power battery pack got off such as electric car
Any decomposition and recombination, but be applied directly in a certain system, in such as energy-storage system.Wording " predeterminated voltage " contains
Justice refers to meet the battery status parameter coherence request of echelon battery pack and pre-set voltage.
By using above-mentioned technical proposal, since the voltage of each echelon battery pack 100 is in the electric discharge of energy-storage system 1 Shi Junneng
It is enough that identical predeterminated voltage is converted by the voltage transformation module 110 of series connection with it, so according to the energy storage of the embodiment of the present disclosure
System 1 to the ununified requirement of the battery status parameters such as voltage, capacity, electricity of the echelon battery pack 100 being used directly,
Also the battery status parameter for not needing each echelon battery pack 100 being used directly is close, namely even if each directly made
The battery status parameter of echelon battery pack 100 is inconsistent, and the voltage of each echelon battery pack 100 can also be carried out consistent
Property be adjusted so that the voltage of all echelon battery packs 100 is converted into identical predeterminated voltage, which greatly increases weight
The flexibility ratio that new echelon utilizes, increases the flexible design degree of energy-storage system 1, and can satisfy the different demands of different clients.
In addition, since the echelon battery pack 100 in the energy-storage system 1 according to the embodiment of the present disclosure is used directly, so comparing
The cost utilized for the prior art this saves echelon again and labour reduce screening difficulty, improve social economy
Benefit, and the battery management system in original echelon battery pack is also retained, so that not needing development and application again in energy storage
The battery management system of system 1, in addition the energy-storage system 1 of diversification configuration can also be provided cope with the different market demand and
Network voltage improves the market competitiveness and customer satisfaction of energy storaging product.
Fig. 2 shows the another schematic block diagrams according to the energy-storage system 1 of the embodiment of the present disclosure.Energy-storage system 1 shown in Fig. 2
It is the further improvement on the basis of energy-storage system 1 shown in Fig. 1.As shown in Fig. 2, the voltage transformation module 110 in Fig. 1 has
Body is realized by DC/DC conversion module 120.One end of DC/DC conversion module 120 and the echelon battery pack 100 being used directly
Electrical connection, the other end export the predeterminated voltage.Energy-storage system 1 further includes DC/AC conversion module 12, the switchgear being sequentially connected in series
13 and transformer 14, one end of the output predeterminated voltage of one end and DC/DC conversion module 120 of DC/AC conversion module 12
Electrical connection, the other end of the DC/AC conversion module 12 is electrically connected with one end of the switchgear 13, the switchgear 13 it is another
One end is electrically connected with the transformer 14.In this way, it is possible in being connected to the grid according to the energy-storage system 1 of the embodiment of the present disclosure come
For the power supply for electrical equipment in power grid.
Preferably, the DC/DC conversion module 120 can be two-way DC/DC conversion module, be also used to that energy storage will be inputed to
The charging voltage of system 1 is converted into being suitble to give the voltage that its concatenated echelon battery pack 100 being used directly charges.Due to
Two-way DC/DC conversion module can either realize that the voltage for the echelon battery pack 100 that will be used directly is converted into predeterminated voltage
Realize the electric discharge for the echelon battery pack being used directly, additionally it is possible to which charging voltage is converted into suitable voltage and come to straight by realization
It connects the echelon battery pack 100 used to charge, so the topological structure of energy-storage system 1 can be simplified, reduces the body of energy-storage system 1
Product.In addition, two-way DC/DC conversion module preferably has the function of overvoltage protection, under-voltage protection, overcurrent protection, short-circuit protection etc..
Preferably, DC/DC conversion module 120 can be electrically connected by dc bus with DC/AC conversion module 12.In this way,
In 1 charge and discharge of energy-storage system, it will be able to realize the charge and discharge for the echelon battery pack 100 being used directly according to certain instruction.
Preferably, DC/AC conversion module 12 can be two-way DC/AC conversion module.In this way, utilizing topology shown in Fig. 2
Structure can be realized as the charge and discharge of energy-storage system 1, simplify the structure of energy-storage system 1.
Fig. 3 shows the schematic block diagram of the energy-storage system 1 according to the another embodiment of the disclosure.Energy-storage system 1 shown in Fig. 3
It is the further improvement on the basis of energy-storage system 1 shown in Fig. 1.As shown in figure 3, the voltage transformation module 110 in Fig. 1 has
Body is realized by two-way Vehicular charger 130.As shown in figure 3, one end of two-way Vehicular charger 130 is used directly with described
The electrical connection of echelon battery pack 100, the other end export the predeterminated voltage；The energy-storage system 1 further includes opening of being sequentially connected in series
Close cabinet 13 and transformer 14, the output predeterminated voltage of one end of the switchgear 13 and the two-way Vehicular charger 130
One end electrical connection, the other end of the switchgear 13 is electrically connected with the transformer 14.Through the above technical solutions, can
Realize that the energy between the echelon battery pack 100 being used directly and power grid is converted, that is, by topological structure shown in Fig. 3,
It can be realized the charging process and discharge process of energy-storage system 1.
Preferably, two-way Vehicular charger 130 is electrically connected by AC bus with switchgear 13.In this way, in energy-storage system 1
When charge and discharge, it will be able to realize the charge and discharge for the echelon battery pack 100 being used directly according to certain instruction.
In addition, in the disclosure, switchgear 13 is mainly used for realizing the relay protection during 1 charge and discharge of energy-storage system
And electric quantity metering.Switchgear 13 can be low-tension switch cabinet or high-tension switch cabinet, preferably low-tension switch cabinet.
In addition, in the disclosure, the echelon battery pack 100 being used directly includes battery control unit (not shown), more
A power battery submodule group (not shown) and multiple battery management unit (not shown), the multiple power battery submodule group and institute
It states multiple battery management units to correspond, the battery management unit is used to carry out corresponding power battery submodule group
Management, the battery control unit is for being managed the echelon battery pack being used directly.
The electric discharge of energy-storage system 1 according to the embodiment of the present disclosure is described below with reference to energy-storage system 1 shown in Fig. 2
Journey, wherein DC/DC conversion module 120 is two-way DC/DC conversion module, and DC/AC conversion module 12 is two-way DC/AC modulus of conversion
Block: firstly, two-way DC/DC conversion module 120 receives the voltage letter for the echelon battery pack 100 of series connection with it being used directly
Number；Then, the voltage signal received is converted into identical predeterminated voltage signal by two-way DC/DC conversion module 120；Then,
Two-way DC/AC conversion module 12 receives the identical predeterminated voltage after two-way DC/DC conversion module 120 is converted by dc bus
The identical predeterminated voltage signal is simultaneously converted into the first ac voltage signal by signal；Then, the first ac voltage signal passes through
It is exported to after a certain proportion of voltage conversion treatment of the relay protection of switchgear 13 and electric quantity metering processing and transformer 14
Electrical equipment, such as power grid.In this way, just completing the discharge flow path of energy-storage system 1.
Next energy-storage system 1 as shown in connection with fig. 2 describes the charging process of energy-storage system 1 according to this embodiment,
Wherein DC/DC conversion module 120 is two-way DC/DC conversion module, and DC/AC conversion module 12 is two-way DC/AC conversion module: first
First, a certain proportion of electricity of transformer 14 is passed through in charging ac voltage signal (such as charging ac voltage signal from power grid)
The second ac voltage signal is obtained after the relay protection of pressure conversion process and switchgear 13 and electric quantity metering processing；Then, two-way
Second ac voltage signal is converted into d. c. voltage signal by DC/AC conversion module 12；Then, two-way DC/AC conversion module 12
D. c. voltage signal after conversion is assigned to two-way DC/DC conversion module 120 according to certain instruction, by dc bus；
Then, the d. c. voltage signal being respectively received is converted into being suitble to giving its concatenated by each two-way DC/DC conversion module 120
The d. c. voltage signal that the echelon battery pack 100 being used directly charges is come the echelon battery being used directly to series connection with it
Packet 100 charges.In this way, being achieved that the charging flow of energy-storage system 1 according to this embodiment.
According to the another embodiment of the disclosure, a kind of method for carrying out energy storage using echelon battery pack is provided, such as Fig. 4 institute
Show, this method comprises:
Voltage conversion in step S401, at least two series arms in parallel, in each series arm
Module receives the voltage signal of the echelon battery pack of series connection with it being used directly in same series arm；And
In step S402, the voltage signal received is converted into predeterminated voltage by the voltage transformation module, wherein institute
There is the predeterminated voltage of the series arm identical.
By using above-mentioned technical proposal, due to each echelon battery pack being used directly voltage can by with its
Concatenated voltage transformation module is converted into identical predeterminated voltage, so being stored up according to this embodiment using echelon battery pack
Can method to the ununified requirement of the battery status parameters such as voltage, capacity, electricity of the echelon battery pack being used directly,
Also the battery status parameter for not needing each echelon battery pack being used directly is close, namely even if each be used directly
The battery status parameter of echelon battery pack is inconsistent, and the voltage of each echelon battery pack can also be carried out by voltage transformation module
Consistency adjustment is so that the voltage of all echelon battery packs is converted into identical predeterminated voltage, and which greatly increases weights
The flexibility ratio that new echelon utilizes, and can satisfy the different demands of different clients.In addition, since echelon battery pack is directly to be made
, so the cost utilized for compared with the prior art this saves echelon again and labour, reduce screening difficulty,
Economic results in society are improved, and also retain the battery management system in original echelon battery pack, so that not needing again
Development and application improve the market competitiveness and customer satisfaction in battery management system.
According to the specific implementation side for carrying out each step in the method for energy storage using echelon battery pack of the embodiment of the present disclosure
Formula is described in detail in the energy-storage system according to the embodiment of the present disclosure, and details are not described herein again.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the disclosure to it is various can
No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (11)
1. a kind of energy-storage system, which is characterized in that the energy-storage system includes at least two series arms, and the series arm includes
The echelon battery pack and voltage transformation module being used directly, the echelon battery pack being used directly and voltage conversion
Block coupled in series connection, at least two series arm are in parallel；The voltage transformation module is used for the direct of series connection with it
The voltage of the echelon battery pack used is converted into predeterminated voltage, and the predeterminated voltage of all series arms is identical.
2. energy-storage system according to claim 1, which is characterized in that the voltage transformation module is DC/DC conversion module,
One end of the DC/DC conversion module is electrically connected with the echelon battery pack being used directly, other end output is described default
Voltage；The energy-storage system further includes DC/AC conversion module, switchgear and the transformer being sequentially connected in series, the DC/AC modulus of conversion
One end of block is electrically connected with one end of the output predeterminated voltage of the DC/DC conversion module, the DC/AC conversion module
The other end is electrically connected with one end of the switchgear, and the other end of the switchgear is electrically connected with the transformer.
3. energy-storage system according to claim 2, which is characterized in that the DC/DC conversion module is two-way DC/DC conversion
Module is also used to that the charging voltage for inputing to the energy-storage system is converted into being suitble to give its concatenated ladder being used directly
The voltage of primary cell packet charging.
4. energy-storage system according to claim 2 or 3, which is characterized in that the DC/DC conversion module passes through dc bus
It is electrically connected with the DC/AC conversion module.
5. energy-storage system according to claim 4, which is characterized in that the DC/AC conversion module is two-way DC/AC conversion
Module.
6. energy-storage system according to claim 1, which is characterized in that the voltage transformation module is two-way vehicle-mounted charge
Machine, one end of the two-way Vehicular charger are electrically connected, described in other end output with the echelon battery pack being used directly
Predeterminated voltage；The energy-storage system further includes the switchgear and transformer being sequentially connected in series, one end of the switchgear and described double
It is electrically connected to one end of the output predeterminated voltage of Vehicular charger, the other end of the switchgear is electrically connected with the transformer
It connects.
7. energy-storage system according to claim 6, which is characterized in that the two-way Vehicular charger by AC bus with
The switchgear electrical connection.
8. according to energy-storage system described in any claim in claim 2-3 and 5-7, which is characterized in that the switchgear
For realizing during the energy-storage system charge and discharge relay protection and electric quantity metering.
9. according to energy-storage system described in any claim in claim 2-3 and 5 to 7, which is characterized in that the switchgear
For low-tension switch cabinet.
10. according to claim 1 to energy-storage system described in any claim in 3 and 5 to 7, which is characterized in that described straight
Connecing the echelon battery pack used includes battery control unit, multiple power battery submodule groups and multiple battery management units, described
Multiple power battery submodule groups and the multiple battery management unit correspond, and the battery management unit is used for right with it
The power battery submodule group answered is managed, the battery control unit be used for the echelon battery pack being used directly into
Row management.
11. a kind of method for carrying out energy storage using echelon battery pack, which is characterized in that this method comprises:
In at least two series arms in parallel, the voltage transformation module in each series arm receives same series connection branch
The voltage signal for the echelon battery pack of series connection with it being used directly in road；And
The voltage signal received is converted into predeterminated voltage by the voltage transformation module, wherein all series arms is pre-
If voltage is identical.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246436.7A CN110299734A (en) | 2018-03-23 | 2018-03-23 | Energy-storage system and the method for carrying out energy storage using echelon battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810246436.7A CN110299734A (en) | 2018-03-23 | 2018-03-23 | Energy-storage system and the method for carrying out energy storage using echelon battery pack |
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| CN110299734A true CN110299734A (en) | 2019-10-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113612277A (en) * | 2021-07-30 | 2021-11-05 | 阳光电源股份有限公司 | Battery unit and control method thereof |
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| CN106849368A (en) * | 2016-10-25 | 2017-06-13 | 蔚来汽车有限公司 | Modularized energy storage power station based on echelon battery |
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| CN113612277B (en) * | 2021-07-30 | 2024-02-09 | 阳光电源股份有限公司 | Battery unit and control method thereof |
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Application publication date: 20191001 |