CN109786866A - A kind of plug and play battery module and battery energy storage system - Google Patents
A kind of plug and play battery module and battery energy storage system Download PDFInfo
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- CN109786866A CN109786866A CN201811402575.0A CN201811402575A CN109786866A CN 109786866 A CN109786866 A CN 109786866A CN 201811402575 A CN201811402575 A CN 201811402575A CN 109786866 A CN109786866 A CN 109786866A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 80
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 7
- 230000006837 decompression Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000009825 accumulation Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000005955 Ferric phosphate Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000005779 cell damage Effects 0.000 description 1
- 208000037887 cell injury Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229940032958 ferric phosphate Drugs 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of plug and play battery module and battery energy storage system, the plug and play battery module, comprising: Battery case；More piece single battery is encapsulated in the Battery case, and reserves connector interface in the outside of the Battery case；Battery management system (BMS) is connected by the connector interface with the multiple batteries.The battery energy storage system includes: multiple plug and play battery modules；Multiple bidirectional energy-storage current transformers are connected to power grid, and are connected with multiple plug and play battery module one-to-one correspondence；Energy storage management system (EMS) is connected with the bidirectional energy-storage current transformer and the plug and play battery module.The present invention improves large-scale energy storage system flexibility ratio and reliability, any one battery pack trouble hunting all will not influence the normal operation of other batteries.
Description
Technical field
The present invention relates to battery energy storage technical field more particularly to a kind of plug and play battery module and battery energy storage systems
System.
Background technique
It is formed after extensive single battery series and parallel of the lithium ion battery energy storage system by thousands of low capacities at present.Storage
Energy system battery is in series and parallel at mould group, and then mould group is composed in series battery pack (PACK), and PACK is composed in series battery cluster, a collection
Vanning formula lithium ion battery energy storage system is composed in parallel by more cluster batteries.Such system is if there is the list in one of PACK
Body cell damage needs replacing entire PACK, and needs again the voltage in balanced cluster between all PACK, and flexibility is poor, dimension
It protects at high cost.
Summary of the invention
The features and advantages of the present invention partly state in the following description, or can from the description it is clear that or
Person can pass through practice present invention study.
To overcome problem of the prior art, the present invention provides a kind of plug and play battery module, comprising:
Battery case；
More piece single battery is encapsulated in the Battery case, and is reserved connector in the outside of the Battery case and connect
Mouthful；
Battery management system (BMS) is connected by the connector interface with the multiple batteries.
Optionally, the connector interface includes acquisition line interface, balanced line interface and charge and discharge electrical interface.
Optionally, the battery management system is fixed on the outer wall of the Battery case.
Optionally, the battery management system includes multiple DC/DC circuits, corresponds phase with the more piece single battery
Even.
A kind of battery energy storage system, comprising:
The plug and play battery module that multiple any embodiments of the present invention provide；
Multiple bidirectional energy-storage current transformers are connected to power grid, and correspond phase with multiple plug and play battery modules
Even；
Energy storage management system (EMS) is connected with the bidirectional energy-storage current transformer and the plug and play battery module.
Optionally, the bidirectional energy-storage current transformer includes two-way DC/DC converter and two-way DC/AC converter；It is described
Two-way DC/DC converter is connected with the plug and play battery module；The two-way DC/AC converter with power grid for being connected.
Optionally, the bidirectional energy-storage current transformer includes controller, connector and the communication being connected with the controller
Unit, grid-connected switch, power conversion unit, breaker；Wherein: the power conversion unit and the grid-connected switch, breaker
It is connected；The connector is connected with the grid-connected switch, breaker.
Optionally, the direct current energy that the bidirectional energy-storage current transformer is used to generate the plug and play battery module boosts
After input power grid；It is also used to the AC energy that power grid generates being rectified into DC voltage and is stored into the plug and play after being depressured
Battery module.
Optionally, the energy storage management system is used for:
Obtain single battery and the voltage of entire module, temperature, electric current and alarm signal in the plug and play battery module
Breath；And/or
Manage and control the transimission power of the bidirectional energy-storage current transformer；And/or
The information such as voltage, frequency, the phase of power grid are detected, the bidirectional energy-storage current transformer and the power grid same period are controlled.
Optionally, the energy storage management system is equipped with remote communication interface.
The present invention provides a kind of plug and play battery module and battery energy storage systems, while improving extensive energy storage system
System flexibility ratio and reliability, any one battery pack trouble hunting all will not influence the normal operation of other batteries；Furthermore this hair
The bright requirement to single battery consistency substantially reduces, it is only necessary to which single layer BMU carries out equilibrium in battery pack, eliminates cluster
It is balanced between interior balanced and cluster, considerably reduce BMS cost.
By reading specification, the feature of these technical solutions and interior is will be best understood in those of ordinary skill in the art
Hold.
Detailed description of the invention
It is specifically described the present invention below with reference to attached drawing and in conjunction with example, advantages of the present invention and implementation will
It is more obvious, wherein content only for the purpose of explanation of the present invention shown in attached drawing, without constitute to it is of the invention in all senses
On limitation, in the accompanying drawings:
Fig. 1 is the structural schematic diagram of the plug and play battery module of the embodiment of the present invention.
Fig. 2 is the battery pack of the embodiment of the present invention and the connection schematic diagram of BMS equalizing circuit.
Fig. 3 is the structural schematic diagram of the battery energy storage system of the embodiment of the present invention.
Fig. 4 is the structural schematic diagram of the bidirectional energy-storage current transformer of the embodiment of the present invention.
Fig. 5 is the main circuit topology schematic diagram of the bidirectional energy-storage current transformer of the embodiment of the present invention.
Fig. 6 is the two-way DC/DC convertor controls block diagram of the embodiment of the present invention.
Specific embodiment
As shown in Figure 1 and Figure 2, the present invention provides a kind of plug and play battery module, comprising: Battery case 11, more piece monomer
Battery 13, battery management system (BMS) 17.Wherein:
More piece single battery 13 is series-parallel to form battery pack 14 together, and is encapsulated in Battery case 11, and in battery
Reserve connector interface 15 in the outside of cabinet.Generally, battery pack 14 can be made of in series and parallel tens of section single batteries, example
Such as, battery pack is made of 32 section 120Ah ferric phosphate lithium cells, sees Fig. 2, and single battery group is combined into 2 and 16 strings, and open terminal voltage is
41V~54V, charge and discharge rated power 2.5kW, capacity 12.5kWh, operating voltage is 40VDC~58.4VDC.
Voltage, temperature acquisition line and equilibrium line are installed on battery electrode column, after battery is connected with harness, the metal that is encapsulated in
In cabinet, and connector interface is reserved, battery management system is accessed by connector interface 15.Connector interface 15 includes adopting
Collect line interface, balanced line interface and charge and discharge electrical interface.
Battery management system 17 can by connection wiring harness on Battery case acquisition line interface, balanced line interface, fill
The interface that discharges is connected.Battery management system 17 can to battery pack 14 carry out intelligent management, battery management system 17 be configured with including
The multiple types interfaces such as power supply, communication, dry contact input/output, acquisition, equilibrium, Insulation monitoring, can acquire in battery pack 14
Voltage, temperature and the main circuit current of each single battery in portion, when over-voltage, under-voltage, excess temperature, overcurrent, connecting fault occurs in battery
Equal sendings alarm and protection signal are uploaded to energy storage management system (EMS) or implement protective separation measure.Battery in the present embodiment
Battery pack is acquired the acquisition equilibrium interface that equilibrium line accesses battery management system 17, battery by connection wiring harness by management system 17
Management system 17 can be fixed on the outer wall of Battery case in a manner of fastening bolt etc., and battery management system 17 is equipped with communication and connects
Mouthful, for being communicated with energy accumulation current converter and EMS.
Battery management system 17 includes multiple DC/DC circuits 18, is connected with more piece single battery one-to-one correspondence.Namely
It says, DC/DC circuit 18 is added on each single battery and carries out equilibrium for battery management system 17, and such design circuit can be same
When to section single battery 13 every in battery pack 14 carry out charge and discharge balancing.Battery management system 17 can decide whether to need to protect
Bidirectional energy-storage current transformer (PCS) is issued a command to when movement, its chaser is notified to protect, if PCS does not have chaser protection act,
Then battery management system 17 executes trip protection movement.
As shown in figure 3, the present invention provides a kind of battery energy storage system, comprising: what multiple any embodiments of the present invention provided
Plug and play battery module, multiple bidirectional energy-storage current transformers (PCS) 20, energy storage management system (EMS) 30.Wherein: multiple double
It is connected to power grid to energy accumulation current converter 20, and is connected with multiple plug and play battery modules one-to-one correspondence, more specifically, two-way storage
Energy current transformer 20 is connected with the battery management system 17 in plug and play battery module.Energy storage management system 30 and bidirectional energy-storage become
The battery management system 17 flowed in device 20 and plug and play battery module is connected.
In the present embodiment, each plug and play battery module and bidirectional energy-storage current transformer are integrated into a small-sized energy storage system
System；Then and machine to container energy-storage system exchange side.Battery management system (BMS) in plug and play battery module and two-way
Energy accumulation current converter is communicated, and then charge and discharge PCS is issued a command to when needing protection act, its chaser is notified to protect,
If protection does not act, own trip protection.
Above-mentioned small-sized energy-storage system is integrated in container, accesses power grid after in parallel；EMS system is provided in container
System can communicate with BMS, energy accumulation current converter etc., and progress power control manages the power input and output of entire energy-storage system.It is logical
Cross this mode, when in battery pack single battery performance degradation to when influencing system worked well, it is only necessary to BMS balancing battery electricity
Pond packet in single battery or by the battery pack be isolated.In the specific implementation, totally 20 groups of 12kWh battery pack can be used,
Totally 20 sets of BMS, totally 20, the bidirectional energy-storage current transformer of 5kW, three corresponds；Wherein EMS configures 1 set, is further provided with other
System such as heat management system, safety supervision and fire-fighting system etc..
As shown in figure 4, bidirectional energy-storage current transformer 20 includes controller 51, connector 58 and is connected with controller 51 logical
Believe unit 52, detection unit 53, heat management system 54, grid-connected switch 57, power conversion unit 56, breaker 55 etc.；Wherein, function
Rate converter unit 56 is also connected with grid-connected switch 57, breaker 55；Connector 58 is connected with grid-connected switch 57, breaker 55.
The conversion of the power between battery pack and power grid may be implemented in bidirectional energy-storage current transformer 20, is realized by connector 58 and is inserted
Use characteristic.Controller 51 can be with power conversion unit 56, grid-connected switch 57, breaker 55, detection unit 53, heat management system
System 54 and communication unit 52 are communicated, and control instruction or transmission data are issued；High-power electric current passes through connector 58, breaker
55, power conversion unit 56 and grid-connected switch 57 etc. are transmitted.
Bidirectional energy-storage current transformer 20 uses multi-stage type topological structure, including the two-way DC/DC converter 21 to link together
With two-way DC/AC converter 22.Two-way DC/DC converter 21 is connected with the battery pack in plug and play battery module；Mainly into
Row cell voltage grade transformation is docked with realizing with inverter direct-flow side matching, and two-way DC/AC converter 22 is used for and power grid phase
Even complete the alternating current-direct current bi-directional conversion of electric energy.The charging of battery pack is exported by energy of AC network, in bidirectional energy-storage current transformer
Two-way DC/AC converter 22 operates in active rectification operating condition, and two-way DC/DC converter 21 operates in Buck decompression mode, will be electric
Network energy is stored to battery；It is exported when electric discharge using battery as energy, two-way DC/DC converter 21 operates in current transformer
Boost boost mode, two-way DC/AC converter 22 operate in active/passive inversion operating condition, the energy content of battery are fed to power grid.
Flexible voltage source control technology is embedded in DC/AC, it can be by more DC/AC equipment in voltage source Working mould without parallel operation line
Parallel running under formula.As it can be seen that bidirectional energy-storage current transformer 20 can be used for the direct current energy liter for generating plug and play battery module
Power grid is inputted after pressure；It is also used to the AC energy that power grid generates being rectified into DC voltage and is stored into described insert i.e. after being depressured
Use battery module.
In addition, the direct current energy that bidirectional energy-storage current transformer generates battery pack, first passes through DC/DC converter boost, then supply
To DC/AC current transformer as DC side input voltage, power grid is inputted after inversion.Otherwise the AC energy that power grid generates passes through DC/
AC current transformer is rectified into DC voltage, is depressured by DC/DC converter, obtains the charging voltage of battery pack.It is converted by DC/DC
The operating voltage of battery pack can be run in a wider range.
Referring to figure 5., Fig. 5 is the main circuit topology schematic diagram of bidirectional energy-storage current transformer.Classify by circuit function, from battery
Hold alternating current net side circuit function at different levels and design considerations are as follows: direct current buffer circuit plays buffering in battery PACK charging
Metering function；Buffer circuit is exchanged, charging exchange side inrush current is inhibited；Main power circuit, the energy as system turn
Unit is changed, DC/DC circuit is responsible for the interface voltage of match battery and inverter bus bar side, inhibits charging current, using semi-bridge type
(Buck/Boost) non-isolation type topological structure, containing high frequency transformer, DC/AC circuit is responsible for stablizing busbar voltage, adjusts and hand over
Discharge power is controlled when flowing side power factor, harmonic wave, while discharging, three-phase half-bridge topology and LCL filter constitute current transformer
The part DC/AC；Three-phase isolation transformer plays electrical isolation and voltage transformation, and, PCS side triangular form star-like using grid side connects
Method has electrical isolation effect, will not enter power grid；LCL filter inhibits current transformer side harmonics, improves grid-connected quality, adopts
With LCL type structure, grid side inductor design is equal to its leakage inductance in isolating transformer.
PCS control includes the control of grid-connected DC/AC current transformer and DC/DC converter Absent measures, and grid-connected converter uses
SVPWM control technology；Two-way DC/DC converter increases an outer voltage compared with constant current mode using double-closed-loop control,
Control block diagram is as shown in Figure 6.First acquire intermediate dc side voltage UdcActual value, be compared, referred to command voltage value
Enable electric current, then by collected inductive current actual value iLIt makes comparisons with current instruction value, generates current error signal, calculate
Corresponding duty ratio, finally generates pwm pulse.
The working condition of bidirectional energy-storage current transformer 20 is divided into voltage source operating mode (source V/F) and current source operating mode
(source PQ).Under the operating mode of the source V/F, bidirectional energy-storage current transformer provides the ancillary services such as frequency modulation, pressure regulation for power grid.In the source PQ
Under operating mode, bidirectional energy-storage current transformer receives to issue/absorb active P and idle Q according to EMS dispatch command.
Energy storage management system 30 is the control centre of the energy-storage system, is on the one hand communicated with BMS, and monomer in battery pack is obtained
Battery and the voltage of entire battery pack, temperature, electric current and warning message；On the other hand it communicates, manages with bidirectional energy-storage current transformer 20
Manage and control the transimission power of each bidirectional energy-storage current transformer；In addition, EMS also passes through the electricity of particular detection device detection power grid
The information such as pressure, frequency, phase, control bidirectional energy-storage current transformer and the power grid same period guarantee container energy-storage system according to mutually powered-down
Power Industry code requirements are incorporated into the power networks.
Energy storage management system 30 is also equipped with remote communication interface, for communicating with energy-accumulating power station control centre, receives system
Energy scheduling.
The DC48V Switching Power Supply and battery pack end joint of unified specification can be used in BMS, PCS, EMS etc. in energy-storage system
Power supply had so not only met the requirement of system plug and play, but also has had the function of black starting-up after so that system is detached from power grid.
The present invention provides a kind of plug and play battery module, and the requirement to single battery consistency substantially reduces, it is only necessary to
Single layer BMU carries out equilibrium in battery pack, eliminates equilibrium between balanced and cluster in cluster, considerably reduces BMS cost.
The present invention provides a kind of battery energy storage system, integrated using plug and play type battery module and bidirectional energy-storage current transformer
For a small-sized energy-storage system；Then and machine to container energy-storage system exchange side；When single battery performance degradation in battery pack
To when influencing system worked well, it is only necessary to which single battery inside BMS balancing battery packet the battery pack is isolated, energy
Enough significantly improve flexibility and reliability.Invention increases energy-storage system designs, the flexibility of construction and maintenance, not only increase
System reliability, also reduces system maintenance cost.
Preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and those skilled in the art do not depart from the scope of the present invention
And essence, there are many variations to implement the present invention.For example, it is shown as part of one embodiment or describes
Feature can be used for another embodiment to obtain another embodiment.The above is only a preferred and feasible embodiment of the present invention, not
Therefore limiting the scope of the invention, it is all with equivalence changes made by description of the invention and accompanying drawing content, it is both contained in
Within interest field of the invention.
Claims (10)
1. a kind of plug and play battery module characterized by comprising
Battery case；
More piece single battery is encapsulated in the Battery case, and reserves connector interface in the outside of the Battery case；
Battery management system (BMS) is connected by the connector interface with the multiple batteries.
2. plug and play battery module according to claim 1, which is characterized in that the connector interface includes that gathering line connects
Mouth, balanced line interface and charge and discharge electrical interface.
3. plug and play battery module according to claim 1, which is characterized in that the battery management system is fixed on described
On the outer wall of Battery case.
4. plug and play battery module according to claim 1, which is characterized in that the battery management system includes multiple
DC/DC circuit is connected with more piece single battery one-to-one correspondence.
5. a kind of battery energy storage system characterized by comprising
Multiple plug and play battery modules as described in Claims 1-4 is any；
Multiple bidirectional energy-storage current transformers are connected to power grid, and are connected with multiple plug and play battery module one-to-one correspondence；
Energy storage management system (EMS) is connected with the bidirectional energy-storage current transformer and the plug and play battery module.
6. battery energy storage system according to claim 5, which is characterized in that the bidirectional energy-storage current transformer includes two-way
DC/DC converter and two-way DC/AC converter；The two-way DC/DC converter is connected with the plug and play battery module；
The two-way DC/AC converter with power grid for being connected.
7. battery energy storage system according to claim 5, which is characterized in that the bidirectional energy-storage current transformer includes control
Device, connector and the communication unit being connected with the controller, grid-connected switch, power conversion unit, breaker；Wherein: institute
Power conversion unit is stated to be connected with the grid-connected switch, breaker；The connector is connected with the grid-connected switch, breaker.
8. battery energy storage system according to claim 5, which is characterized in that the bidirectional energy-storage current transformer is used for will be described
Power grid is inputted after the direct current energy boosting that plug and play battery module generates；It is also used to for the AC energy that power grid generates being rectified into
The plug and play battery module is stored into after DC voltage and decompression.
9. battery energy storage system according to claim 5, which is characterized in that the energy storage management system is used for:
Obtain single battery and the voltage of entire module, temperature, electric current and warning message in the plug and play battery module；
And/or
Manage and control the transimission power of the bidirectional energy-storage current transformer；And/or
The information such as voltage, frequency, the phase of power grid are detected, the bidirectional energy-storage current transformer and the power grid same period are controlled.
10. battery energy storage system according to claim 5, which is characterized in that the energy storage management system is equipped with long-range logical
Believe interface.
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| CN201811402575.0A CN109786866B (en) | 2018-11-23 | 2018-11-23 | Plug-and-play battery module and battery energy storage system |
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| CN111354991A (en) * | 2020-03-27 | 2020-06-30 | 南京国电南自新能源科技有限公司 | Battery maintenance system and method and microgrid system capable of maintaining batteries on line |
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| CN113783252A (en) * | 2021-08-26 | 2021-12-10 | 四川科陆新能电气有限公司 | Virtual internal resistance adjusting device for balancing between battery clusters |
| CN113852205A (en) * | 2020-06-28 | 2021-12-28 | 江苏多益能源科技有限公司 | High-performance plug-and-play micro-grid energy storage system |
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| CN112467769A (en) * | 2020-11-23 | 2021-03-09 | 阳光电源股份有限公司 | Modularized pre-installed energy storage system |
| CN113783252A (en) * | 2021-08-26 | 2021-12-10 | 四川科陆新能电气有限公司 | Virtual internal resistance adjusting device for balancing between battery clusters |
| CN113783252B (en) * | 2021-08-26 | 2024-04-16 | 四川科陆新能电气有限公司 | Virtual internal resistance adjusting device for balancing among battery clusters |
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