CN112290572A - Safety control method of energy storage system - Google Patents
Safety control method of energy storage system Download PDFInfo
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- CN112290572A CN112290572A CN202011121685.7A CN202011121685A CN112290572A CN 112290572 A CN112290572 A CN 112290572A CN 202011121685 A CN202011121685 A CN 202011121685A CN 112290572 A CN112290572 A CN 112290572A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/103—Fuse
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
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- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- 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
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- 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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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/14—Energy storage units
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to the technical field of energy storage systems, in particular to a safety control method of an energy storage system, which comprises an energy storage battery pack, a battery management system, an energy management system and a safety monitoring system, wherein the energy storage battery pack, the battery management system and the energy management system are sequentially in communication connection; and an energy storage inverter is connected between the battery management system and the safety monitoring system. The invention has the beneficial effects that: the system is communicated with a battery management system, an energy management system and an energy storage inverter through independent safety monitoring systems, and has multi-channel communication capacity; and when the execution protection fails, the protection can still be carried out through the safety unit, so that the method is more stable and efficient, and can deal with various abnormal conditions.
Description
Technical Field
The invention relates to the technical field of energy storage systems, in particular to a safety control method of an energy storage system.
Background
At present, in the field of chemical energy storage, lithium ion batteries become the first choice for large-scale energy storage due to the excellent characteristics of environmental protection, long cycle life and the like, and are widely applied to matching of power generation and energy storage of renewable energy sources such as wind power, photovoltaic and the like and frequency modulation and peak shaving of power plants. The management control of the large energy storage system mainly comprises a Battery Management System (BMS) and an Energy Management System (EMS), wherein the BMS mainly collects battery information and implements management, and the EMS controls the charging and discharging of an energy storage inverter (PCS) through uploaded information and issued instructions. BMS transmits battery information to EMS, EMS transmits instruction information to PCS, PCS communicates with BMS and controls battery charging and discharging, and when safety protection measures need to be taken, specific operation is implemented after information is sent to instructions.
Because the lithium ion battery has the advantages of large energy density, long service life, environmental protection and the like, the lithium ion battery is widely applied to a large energy storage system. The large-scale energy storage system with high voltage and large current is combined by a large number of single batteries in a complex series-parallel connection mode. Therefore, the safety control requirement of the large energy storage system is higher, the rapid response is needed, the good communication is guaranteed, and the safety measures can be implemented smoothly.
The prior art has certain disadvantages and hidden dangers, and because BMS real-time monitoring data is huge and the processing capacity is large, when the battery has the hidden dangers, safety control measures can be implemented only through uploading and information sending layer by layer, so that the optimal time is usually missed, and unnecessary loss is caused. In addition, the safety management channel in the prior art is the same as the normal information transmission channel, and when the channel fails, the safety control measures cannot be implemented in time.
Disclosure of Invention
The present invention is directed to a safety control method for an energy storage system, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a safety control method of an energy storage system is characterized in that the energy storage system is provided with an energy storage battery pack, a battery management system, an energy management system and a safety monitoring system, the energy storage battery pack, the battery management system and the energy management system are sequentially in communication connection, the energy storage battery pack, the battery management system and the energy management system are also respectively in communication connection with the safety monitoring system, the energy storage battery pack comprises a plurality of battery clusters formed by battery units, and a total positive interface and a total negative interface of each battery cluster are respectively provided with a safety unit for protecting the battery units; and an energy storage inverter is connected between the battery management system and the safety monitoring system, and the energy storage inverter is also connected with a power grid and used for alternating current-direct current bidirectional conversion.
As a further scheme of the invention: the battery management system and the safety monitoring system jointly control the insurance unit.
As a still further scheme of the invention: the safety unit at least comprises a fuse and a relay switch.
As a still further scheme of the invention: the system comprises a safety monitoring system and is characterized by further comprising an environmental parameter acquisition unit, wherein the environmental parameter acquisition unit is used for acquiring environmental parameters of the energy storage battery pack and sending the environmental parameters to the safety monitoring system, and the safety monitoring system processes received data and generates a safety control instruction to control all parts to work.
As a still further scheme of the invention: the battery management system is used for transmitting real-time monitoring data and processed state information of battery operation to the energy management system and transmitting related information of safety control to the safety monitoring system.
As a still further scheme of the invention: the method comprises the following steps: the battery management system, the energy storage inverter, the safety monitoring system and the energy management system respectively detect the energy storage battery pack; when a safety fault is detected, the safety monitoring system communicates with the energy storage inverter, sends an instruction to execute a protection action, and simultaneously issues an instruction to the energy storage battery pack of the cluster where the battery unit with the safety fault is located to execute a disconnection action.
As a still further scheme of the invention: when the safety fault of the environmental parameter acquisition unit is detected, the safety monitoring system controls all the battery units to execute disconnection operation and communicates with the energy management system, the battery management system and the energy storage inverter to execute related operation; or when the safety monitoring system detects a safety fault and comes from the battery unit, the safety monitoring system communicates with the energy storage inverter, sends an instruction to execute a protection action, and simultaneously issues an instruction to the energy storage battery pack of the cluster where the battery unit with the safety fault is located to execute a disconnection action; the safety monitoring system is communicated with the battery management system and the energy management system and executes related protection programs.
As a still further scheme of the invention: when the battery management system detects a safety fault, the battery management system communicates with the energy management system and the safety monitoring system, and one of the energy management system and the safety monitoring system sends an instruction to the energy storage inverter to execute a protection action.
As a still further scheme of the invention: when the energy management system detects a safety fault, the energy management system sends an instruction to the energy storage inverter to execute a protection action, and simultaneously, the energy management system communicates with the battery management system and the energy storage safety monitoring system to execute a related protection program.
As a still further scheme of the invention: when the communication connection of the battery management system or the energy storage inverter fails, the communication with the safety monitoring system is realized through the communication connection which does not fail; and when all the communication connections fail, the fuse protection action is executed through the safety unit.
Compared with the prior art, the invention has the beneficial effects that: the system is communicated with a battery management system, an energy management system and an energy storage inverter through independent safety monitoring systems, and has multi-channel communication capacity; and when the execution protection fails, the protection can still be carried out through the safety unit, so that the method is more stable and efficient, and can deal with various abnormal conditions.
Drawings
Fig. 1 is a schematic control principle diagram of a safety control method of an energy storage system in an embodiment of the invention.
Fig. 2 is a schematic structural diagram of an energy storage system according to an embodiment of the invention.
In the drawings: 1. an energy storage battery pack; 2. a relay switch; 3. and a fuse.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Referring to fig. 1-2, in an embodiment of the present invention, an energy storage system is provided with an energy storage battery pack, a battery management system, an energy management system, and a safety monitoring system, where the energy storage battery pack, the battery management system, and the energy management system are sequentially in communication connection, the energy storage battery pack, the battery management system, and the energy management system are further respectively in communication connection with the safety monitoring system, the energy storage battery pack includes a plurality of battery clusters formed by battery units, and a total positive interface and a total negative interface of each battery cluster are respectively provided with a safety unit for protecting the battery units; and an energy storage inverter is connected between the battery management system and the safety monitoring system, and the energy storage inverter is also connected with a power grid and used for alternating current-direct current bidirectional conversion.
Specifically, the energy storage battery pack is connected with a battery management system and a safety monitoring system through a CAN bus, the battery management system is connected with an energy storage inverter through the CAN bus, and is connected with the energy management system and the safety monitoring system through a ModBus interface; the safety monitoring system is respectively connected with the energy management system and the energy storage inverter through a CAN bus or a ModBus interface and a ModBus interface. And multi-channel parallel communication is realized without transmitting information step by step. The energy storage inverter is a connecting device between an external power grid and an energy storage system, is used for alternating current-direct current bidirectional conversion, charges and discharges the energy storage system, and receives an instruction of an energy management system.
The Controller Area Network (CAN) is a short name for a Controller Area Network (CAN), and the ModBus is a serial communication protocol.
The battery management system and the safety monitoring system jointly control the safety unit, and when a safety fault occurs, the battery management system and the safety monitoring system can independently and synchronously execute related protection actions through the safety unit, so that the damage of the energy storage battery pack is prevented from being enlarged.
In conclusion, the independent safety monitoring system is respectively communicated with the battery management system, the energy management system and the energy storage inverter, so that the multi-channel communication capability is realized; and when the execution protection fails, the protection can still be carried out through the safety unit, so that the method is more stable and efficient, and can deal with various abnormal conditions.
Furthermore, the battery management system and the energy storage inverter are provided with two or more communication links. The reliability, the safety and the stability of communication between the battery management system and the energy storage inverter are ensured by arranging the two communication links, and the disaster tolerance performance of the system is further improved.
Referring to fig. 2, in a preferred embodiment of the present invention, the safety unit at least includes a fuse 3 and a relay switch 2.
Specifically, 1 battery cluster is formed by 18 battery units connected in series, 4 battery clusters are connected in parallel to form an energy storage battery pack 1, and when the battery clusters are formed, a fusing fuse (fuse) and a relay switch are respectively connected to a total positive interface and a total negative interface of each battery cluster, so that the functions of controlling power on and off and forced protection are achieved.
The battery management system and the safety monitoring system control the on-off of the battery units included in the energy storage battery pack 1 through the relay switch 2. The overload of the battery unit is forcibly protected by the fuse 3, and the energy storage battery pack is prevented from being further damaged.
Referring to fig. 1, in another embodiment of the present invention, the present invention further includes an environmental parameter collecting unit, where the environmental parameter collecting unit is configured to collect environmental parameters of the energy storage battery pack and send the environmental parameters to the safety monitoring system, and the safety monitoring system processes received data and generates a safety control instruction to control operations of each component.
The environment parameter acquisition unit comprises a temperature sensor and a smoke detector, the temperature sensor and the smoke detector are connected with the fire control unit, the fire control unit controls the fire control system to work, the temperature sensor, the smoke detector and the fire control unit are connected with the safety monitoring system, and monitoring information is uploaded to the safety monitoring system and controlled by the safety monitoring system.
Referring to fig. 1, in another embodiment of the present invention, the battery management system is configured to transmit real-time monitoring data and processed state information of the battery operation to the energy management system, and is further configured to transmit related information of safety control to the safety monitoring system.
The BMS transmits real-time monitoring data (voltage, temperature, current and the like) of the operation of the energy storage battery pack and processed state information (SOC, SOH and the like) to the EMS, and uploads related information (highest/low voltage, highest/low temperature, highest/low SOC and the like) of safety control to a safety monitoring system; and the EMS and the safety monitoring system send out corresponding control instructions according to the received data to control the stable operation of the energy storage battery pack.
Referring to fig. 1, in another embodiment of the present invention, the method includes the following steps: the battery management system, the energy storage inverter, the safety monitoring system and the energy management system respectively detect the energy storage battery pack; when a safety fault is detected, the safety monitoring system communicates with the energy storage inverter, sends an instruction to execute a protection action, and simultaneously sends an instruction to the energy storage battery pack of the cluster where the battery unit with the fault is located to execute a disconnection action.
Specifically, when a safety fault of the environmental parameter acquisition unit is detected, the safety monitoring system controls all the battery units to execute disconnection operation and communicates with the energy management system, the battery management system and the energy storage inverter to execute related operation; or when the safety monitoring system detects a safety fault and comes from the battery unit, the safety monitoring system communicates with the energy storage inverter, sends an instruction to execute a protection action, and simultaneously issues an instruction to the energy storage battery pack of the cluster where the battery unit with the fault is located to execute a disconnection action; the safety monitoring system is communicated with the battery management system and the energy management system and executes related protection programs.
When the battery management system detects a safety fault, the battery management system communicates with the energy management system and the safety monitoring system, and one of the energy management system and the safety monitoring system sends an instruction to the energy storage inverter to execute a protection action.
When the energy management system detects a safety fault, the energy management system sends an instruction to the energy storage inverter to execute a protection action, and simultaneously, the energy management system communicates with the battery management system and the energy storage safety monitoring system to execute a related protection program.
Referring to fig. 1, in a preferred embodiment of the present invention, when the communication connection of the battery management system, the energy management system or the energy storage inverter fails, the communication with the safety monitoring system is implemented through the communication connection that is not failed; and when all the communication connections fail, the fuse protection action is executed through the safety unit.
If the communication between the BMS and the EMS is invalid, the BMS can be communicated with the energy storage safety monitoring system, and vice versa. If the communication between the EMS and the PCS fails, the EMS can communicate with the energy storage safety monitoring system through the PCS, and vice versa; and if all the communication connections fail, executing fusing protection action through the fuse of the safety unit. The communication lines of the components of the whole energy storage system are at least two, so that the safety risk caused by communication faults is reduced.
The working principle of the invention is as follows: the energy storage battery pack is connected with a battery management system and a safety monitoring system through a CAN bus, the battery management system is connected with an energy storage inverter through the CAN bus, and is connected with the energy management system and the safety monitoring system through a ModBus interface; the safety monitoring system is respectively connected with the energy management system and the energy storage inverter through a CAN bus or a ModBus interface and a ModBus interface. And multi-channel parallel communication is realized without transmitting information step by step. The energy storage inverter is a connecting device between an external power grid and an energy storage system, is used for alternating current-direct current bidirectional conversion, charges and discharges the energy storage system, and receives an instruction of an energy management system.
It should be noted that the relay switch and the fuse used in the present invention are all applications in the prior art, and those skilled in the art can implement the intended functions according to the related description, or implement the technical features required to be achieved by similar techniques, and will not be described in detail herein.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. The safety control method of the energy storage system is characterized in that the energy storage battery pack, the battery management system and the energy management system are respectively in communication connection with the safety monitoring system, the energy storage battery pack comprises a plurality of battery clusters formed by battery units, and a total positive interface and a total negative interface of each battery cluster are respectively provided with a safety unit for protecting the battery units; and an energy storage inverter is connected between the battery management system and the safety monitoring system, and the energy storage inverter is also connected with a power grid and used for alternating current-direct current bidirectional conversion.
2. The safety control method of the energy storage system according to claim 1, wherein the battery management system and the safety monitoring system together control a fuse unit.
3. The safety control method of the energy storage system according to claim 1, wherein the safety unit includes at least a fuse and a relay switch.
4. The safety control method of the energy storage system according to claim 1, further comprising an environmental parameter acquisition unit, wherein the environmental parameter acquisition unit is configured to acquire environmental parameters of the energy storage battery pack and send the environmental parameters to the safety monitoring system, and the safety monitoring system processes received data and generates a safety control instruction to control operations of each component.
5. The safety control method of the energy storage system according to claim 1, wherein the battery management system is configured to transmit real-time monitoring data and processed state information of battery operation to the energy management system, and further configured to transmit related information of safety control to the safety monitoring system.
6. The safety control method of the energy storage system according to any one of claims 1 to 5, characterized by comprising the steps of: the battery management system, the energy storage inverter, the safety monitoring system and the energy management system respectively detect the energy storage battery pack; when a safety fault is detected, the safety monitoring system communicates with the energy storage inverter, sends an instruction to execute a protection action, and simultaneously issues an instruction to the energy storage battery pack of the cluster where the battery unit with the safety fault is located to execute a disconnection action.
7. The safety control method of the energy storage system according to claim 6, wherein when a safety fault of the environmental parameter acquisition unit is detected, the safety monitoring system controls all the battery units to perform disconnection operation and performs related operation in communication with the energy management system, the battery management system and the energy storage inverter; or when the safety monitoring system detects a safety fault and the safety fault comes from the battery unit, the safety monitoring system communicates with the energy storage inverter, sends an instruction to execute a protection action, and simultaneously sends the instruction to the energy storage battery pack of the cluster where the battery unit with the safety fault is located to execute a disconnection action.
8. The safety control method of the energy storage system according to claim 6, wherein when the battery management system detects a safety fault, the battery management system communicates with the energy management system and the safety monitoring system, and one of the two sends a command to the energy storage inverter to perform a protection action.
9. The safety control method of the energy storage system according to claim 6, wherein when the energy management system detects a safety fault, the energy management system sends a command to the energy storage inverter to perform a protection action, and simultaneously communicates with the battery management system and the energy storage safety monitoring system to perform a related protection procedure.
10. The safety control method of the energy storage system according to claim 9, wherein when the communication connection of the battery management system or the energy storage inverter fails, the communication with the safety monitoring system is realized through the communication connection which is not failed; and when all the communication connections fail, the fuse protection action is executed through the safety unit.
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