CN207166152U - A kind of distributed energy storage system and its control system - Google Patents
A kind of distributed energy storage system and its control system Download PDFInfo
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- CN207166152U CN207166152U CN201720986112.8U CN201720986112U CN207166152U CN 207166152 U CN207166152 U CN 207166152U CN 201720986112 U CN201720986112 U CN 201720986112U CN 207166152 U CN207166152 U CN 207166152U
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- energy storage
- battery
- energy
- storage system
- battery pack
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Abstract
A kind of distributed energy storage system and its control system are the utility model is related to, this energy-storage system includes energy storage cabinet, master control administrative unit, the monomer energy-storage battery being installed in energy storage cabinet body and one-to-one collection balanced unit and background monitoring device；Monomer energy-storage battery is connected with each other with corresponding collection balanced unit, and each balanced unit that gathers is connected with the master control administrative unit in cabinet respectively, and the master control administrative unit of each cabinet is connected with background monitoring device by CAN network；Each monomer energy-storage battery is sequentially connected in series, and is connected by contactor with power network；Controller of the background monitoring device also with each contactor is connected.The utility model reduces the integrated constraint of energy-storage system, it is allowed to different monomer energy-storage batteries is installed in different energy storage cabinet bodies.Using above preferably improving unbalanced situation of the system in charge and discharge process.
Description
Technical field
A kind of distributed energy storage system and its control system are the utility model is related to, belongs to energy-storage system battery management neck
Domain.
Background technology
Energy-storage system is mainly by energy-storage battery, battery management system (Battery Management System, BMS), energy
Measure converting system (Power Conversion System, PCS) and background control system composition.Battery management system is one
Real-time monitoring system based on microprocessor, its major function are that battery is monitored and protected, and can effectively monitor electricity
Pond state (voltage, electric current and temperature etc.), the failure that battery pack is likely to occur is alarmed and protects battery body, ensures electricity
Safe and reliable, the stable operation of pond group.
At present, the energy-storage battery in Large Copacity energy-storage system, frequently with lithium ion battery, lead-acid battery or other electrochemistry
Energy-storage battery, it is mainly characterized by, and monomer voltage is low, and capacity is small, if lithium-ion battery monomer voltage is 3.2V, common capacity etc.
Level has the series such as 50/75/100/180Ah.For high-power high-voltage systematic difference, it is necessary to battery series-parallel connection using more piece
System.
Existing energy-storage system, in order to ensure the harmony of the monomer energy-storage battery of series connection, it is necessary to use same energy storage
Battery builds energy storage device, and requires that the parameters of energy-storage battery are consistent as far as possible, and this considerably increases structure to store up
The constraint of energy system.
In addition, inevitably bringing a series of balanced sex chromosome mosaicisms after a large amount of energy-storage battery series/parallels, actually using
When, series connection accumulation battery pack is utilized in capacity, the performance in security and life-span etc. still far away from monomer energy-storage battery,
Its key problem is the unbalanced of energy-storage battery group.
Specifically, in the fabrication process, voltage, internal resistance and operating temperature of cell etc. are incomplete same, respectively
There is some difference for the initial capacity of cell.During battery power discharge, the low cell of capacity is put because crossing first
Conductance causes monomer battery voltage too low and loses discharge capability.Now, it is low relative to the high cell of other capacity, capacity
Cell becomes load, and it is powered by the high cell of capacity, so as to the phenomenon of cell polarity inversion occur,
So that whole battery pack can not normal work, while its life-span also can be by extreme influence.In subsequent charging process, this
The cell that a little capacity reduce can be filled first again, occur overcharging electrical phenomena so that whole battery pack can not normally be full of
Electricity.In actual use, the capacity that series battery can be released actually is determined by the minimum cell of capacity, when
When the cell capacity is run out, whole battery pack will be unable to continue normal work, and charging process is also such.
Utility model content
The purpose of this utility model is to provide a kind of distributed energy storage system and its control system, to solve prior art
To energy-storage battery coherence request harshness, energy-storage system structure constraint is big, different monomers energy-storage battery can not be used to build energy storage
The problem of system.
To achieve the above object, scheme of the present utility model includes：
A kind of distributed energy storage system of the present utility model, including main circuit and control system,
Main circuit includes at least one battery pack, and each battery pack is arranged in corresponding battery rack, and each battery pack is led to
Corresponding coupling or uncoupling means, energy conversion device and power network is crossed to connect；
Control system includes gathering balanced unit correspondingly with each cell in the battery pack, described to adopt
Collection balanced unit includes being used for the Acquisition Circuit for gathering monomer battery voltage and the equalizing circuit for carrying out battery equilibrium；One
Collection balanced unit in individual battery rack is all connected with a master control administrative unit；The master control administrative unit and controlling bus phase
Even, the controlling bus is connected with background monitoring device, and the background monitoring device control connects the coupling or uncoupling means of each cabinet.
Further, each cell type in a battery pack is identical, each cell class in different battery packs
Type is different.
Further, the coupling or uncoupling means are charging contactor and electric discharge contactor or charge and discharge electric contactor.
Further, the controlling bus is CAN.
A kind of control system of distributed energy storage system of the present utility model, including with each battery in distributed energy storage system
Each cell in group gathers balanced unit correspondingly, and the collection balanced unit includes being used to gather cell
The Acquisition Circuit of voltage and the equalizing circuit for carrying out equilibrium to battery；The collection balanced unit of one battery pack is all connected with one
Individual master control administrative unit；The master control administrative unit is connected with controlling bus, and the controlling bus is connected with background monitoring device,
The background monitoring device control connects the coupling or uncoupling means of each battery pack.
Further, each cell type in a battery pack is identical, each cell class in different battery packs
Type is different.
Further, the coupling or uncoupling means are charging contactor and electric discharge contactor or charge and discharge electric contactor.
Further, the controlling bus is CAN.
The beneficial effects of the utility model are：
The utility model is provided with master control administrative unit in each battery pack, and equilibrium is provided with each cell
Unit, it can realize and all monomer battery voltages in different cabinets are acquired, judged extremely and by power consuming circuit reality
Balance route between existing cell；In addition, in discharge and recharge, according to dump energy echelon each battery cabinet can be controlled to access
Power network carries out discharge and recharge, solves the lack of uniformity in the charge and discharge process between each cabinet；Therefore, the utility model can be permitted
Perhaps different cabinets install different types of energy storage electromagnetism, reduce the integrated constraint of energy-storage system, realize energy-storage battery complete
Echelon in portion's useful life utilizes.
Brief description of the drawings
Fig. 1 is distributed energy storage system group network figure.
Embodiment
The utility model is described in more detail below in conjunction with the accompanying drawings.
A kind of distributed energy storage system as shown in Figure 1, including energy storage cabinet, monomer energy-storage battery, each energy storage cabinet
Gathered corresponding to master control administrative unit, each monomer energy-storage battery corresponding to corresponding energy conversion system, each energy storage cabinet
Charge and discharge electric contactor Q1+, Q1-, Q2+, Q2- ... Qn+, Qn- and backstage corresponding to balanced unit, each cabinet positive and negative busbar
Supervising device.
For each energy storage cabinet, the corresponding collection balanced unit of each monomer energy-storage battery is connected, and each collection is equal
Weighing apparatus unit is connected with the master control administrative unit in the energy storage cabinet body respectively, and the master control administrative unit passes through control line and CAN nets
Network is connected, and background monitoring device is connected with CAN network；Each monomer energy-storage battery is connect after being sequentially connected in series by power line and discharge and recharge
Tentaculum is connected with energy conversion system, and the energy conversion system is connected with power network；The background monitoring device passes through CAN network
It is connected with each charge and discharge electric contactor control terminal.
The master control administrative unit and collection balanced unit can use such as Luoyang Bao Yingzhikong Science and Technology Ltd.s
MCMU battery master control administrative units and CABU batteries collection balanced unit.
Monomer energy-storage battery can be that various batteries can also be other types energy storage device, in same energy storage cabinet body
For same type cell, battery serial number is according to energy conversion system (Power Conversion in each cabinet
System, PCS) operating voltage depending on, principle is that serial number is few as far as possible, so as to reduce the unbalanced of battery
Property.
The system uses 3 layer-management patterns, realizes the management to energy-storage system battery.
First layer managing system is collection balanced unit module, main to realize to monomer energy-storage battery electricity in energy storage cabinet body
Pressure, the collection and equilibrium of temperature；
Second layer managing system is that main keyholed back plate manages unit module, is mainly realized to all monomer energy storage in whole energy storage cabinet body
Cell voltage, the handling of temperature data, it is abnormal judge, current acquisition and Balance route.Master control administrative unit module is by cabinet
Monomer voltage that all collection balanced units having under its command collect, monomer temperature data are analyzed and processed, and can obtain cabinet
Highest, minimum temperature monomer sites, are then controlled by Balance route strategy in interior highest, minimum voltage monomer sites and cabinet
The corresponding collection balanced unit of system is to needing the balanced monomer energy-storage battery of progress to carry out equalization operation.
Third layer management system is background monitoring device, and supervising device operation has monitoring software.Monitoring software receives all
The parameters such as the data of cabinet master control administrative unit module, including cabinet voltage, cabinet electric current, energy-storage battery type, SOC.Monitoring
Software can correspond to the state that parameter value judges the case according to cabinet, and corresponding cabinet contactor is controlled in the state according to PCS
State.It thus can be very good the magnitude of voltage of balanced each cabinet.Different battery types and state can thus be realized
Common networking, co-ordination is carried out by monitoring software.
In the present embodiment, battery pack by grid charging, it is necessary to when to power network discharge.The system can also be used in practice
In other occasions.The present embodiment is not limited herein.
When system is operated under charge mode, background monitoring device selection closure SOC value is less than 80% energy storage cabinet
Charge and discharge electric contactor, power network are this part energy storage cabinet bulk charging；When there is energy storage cabinet SOC value to reach 80%, background monitoring device
The charge and discharge electric contactor of the cabinet is disconnected, power network stops charging to it.
When all energy storage cabinet SOC values all reach 80%, and system is still under charge mode, background monitoring device closure
The charge and discharge electric contactor of all energy storage cabinets, power network are powered for all energy storage cabinets；When thering is cabinet SOC value to reach 100% or have
Cabinet have under its command monomer energy-storage battery voltage reach allow peak when, disconnect the cabinet charge and discharge electric contactor, stop to the cabinet
Charging.When all cabinets stop charging, charging complete.
All contactor action triggers SOC values can be adjusted according to being actually needed.
When system is operated under discharge mode, background monitoring device selection closure SOC value n energy storage cabinet of highest fills
Discharge contactor, and the performance number that n numerical value discharges as needed determines that this part energy storage cabinet is powered to power network；When being in
Discharge condition and SOC are that energy storage cabinet SOC value minimum in electric discharge cabinet continuously reaches less than any cabinet for being not in electric discharge
30 minutes, background monitoring device closed the charge and discharge electric contactor for being not in SOC highests charging cabinet in discharge condition first, should
Cabinet is powered to power network, is then turned off the charge and discharge electric contactor for the cabinet that SOC is minimum in the charging, is stopped its electric discharge.
When all energy storage cabinet SOC values are less than 10%, background monitoring device disconnects the charge and discharge electrical contact of all energy storage cabinets
Device, stop discharging to power network, system discharge is completed.
All contactor action triggers SOC values and time threshold can be adjusted according to being actually needed.
Claims (8)
- A kind of 1. distributed energy storage system, it is characterised in that including main circuit and control system,Main circuit includes at least one battery pack, and each battery pack is arranged in corresponding battery rack, and it is right that each battery pack passes through Coupling or uncoupling means, energy conversion device and the power network answered connect；Control system includes gathering balanced unit correspondingly with each cell in the battery pack, and the collection is equal Weighing apparatus unit includes being used for the Acquisition Circuit for gathering monomer battery voltage and the equalizing circuit for carrying out battery equilibrium；One electricity Collection balanced unit in the cabinet of pond is all connected with a master control administrative unit；The master control administrative unit is connected with controlling bus, institute State controlling bus with background monitoring device to be connected, the background monitoring device control connects the coupling or uncoupling means of each cabinet.
- A kind of 2. distributed energy storage system according to claim 1, it is characterised in that each monomer electricity in a battery pack Pond type is identical, and each cell type in different battery packs is different.
- 3. a kind of distributed energy storage system according to claim 1, it is characterised in that the coupling or uncoupling means are charge contact Device and electric discharge contactor or charge and discharge electric contactor.
- 4. a kind of distributed energy storage system according to claim 1, it is characterised in that the controlling bus is CAN.
- A kind of 5. control system of distributed energy storage system, it is characterised in that, including with each battery pack in distributed energy storage system In each cell gather balanced unit correspondingly, the collection balanced unit includes being used to gather cell electricity The Acquisition Circuit of pressure and the equalizing circuit for carrying out equilibrium to battery；The collection balanced unit of one battery pack is all connected with one Master control administrative unit；The master control administrative unit is connected with controlling bus, and the controlling bus is connected with background monitoring device, institute State the coupling or uncoupling means that the control of background monitoring device connects each battery pack.
- 6. the control system of a kind of distributed energy storage system according to claim 5, it is characterised in that in a battery pack Each cell type it is identical, each cell type in different battery packs is different.
- A kind of 7. control system of distributed energy storage system according to claim 5, it is characterised in that the coupling or uncoupling means For charging contactor and electric discharge contactor or charge and discharge electric contactor.
- A kind of 8. control system of distributed energy storage system according to claim 5, it is characterised in that the controlling bus For CAN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720986112.8U CN207166152U (en) | 2017-08-08 | 2017-08-08 | A kind of distributed energy storage system and its control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720986112.8U CN207166152U (en) | 2017-08-08 | 2017-08-08 | A kind of distributed energy storage system and its control system |
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| Publication Number | Publication Date |
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| CN207166152U true CN207166152U (en) | 2018-03-30 |
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| CN201720986112.8U Expired - Fee Related CN207166152U (en) | 2017-08-08 | 2017-08-08 | A kind of distributed energy storage system and its control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066894A (en) * | 2018-09-11 | 2018-12-21 | 深圳市科陆电子科技股份有限公司 | Multistage SOC balance control method based on AGC frequency modulation energy-storage system |
| CN111082459A (en) * | 2020-01-02 | 2020-04-28 | 中车株洲电力机车有限公司 | Method, device and system for controlling grid connection of distributed energy storage power supply |
-
2017
- 2017-08-08 CN CN201720986112.8U patent/CN207166152U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066894A (en) * | 2018-09-11 | 2018-12-21 | 深圳市科陆电子科技股份有限公司 | Multistage SOC balance control method based on AGC frequency modulation energy-storage system |
| CN111082459A (en) * | 2020-01-02 | 2020-04-28 | 中车株洲电力机车有限公司 | Method, device and system for controlling grid connection of distributed energy storage power supply |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180330 Termination date: 20200808 |