CN115513541A - Energy storage safety control system and method - Google Patents
Energy storage safety control system and method Download PDFInfo
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- CN115513541A CN115513541A CN202211162465.8A CN202211162465A CN115513541A CN 115513541 A CN115513541 A CN 115513541A CN 202211162465 A CN202211162465 A CN 202211162465A CN 115513541 A CN115513541 A CN 115513541A
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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
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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
- 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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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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
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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Abstract
The invention discloses an energy storage safety control system and a method, wherein the system comprises: the system comprises a safety chain module, an energy storage management module and a main circuit breaker; the safety chain module sends a shutdown signal to the main circuit breaker when monitoring a fault signal and/or an abnormal signal, the fault signal is generated by the energy storage management module when detecting that a software control function is invalid, the abnormal signal is generated by the safety chain module when monitoring that an abnormal condition exists in a target energy storage system, the safety chain module also sends the abnormal signal to the energy storage management module so that the energy storage management module sends the shutdown signal to the main circuit breaker, and the main circuit breaker controls the target energy storage system to be shut down when receiving the shutdown signal. Compared with the conventional safety system which realizes safety control through software and has slow response of control signals, the safety chain module is constructed to integrate the fault signals and/or abnormal signals, so that the response speed of the safety signals is increased, and the safety action can be independently performed when the software control fails, so that the reliability of the system is improved.
Description
Technical Field
The invention relates to the technical field of electric energy storage systems, in particular to an energy storage safety control system and method.
Background
In recent years, with the transition of power structures, electrochemical energy storage systems that are inseparable from new energy power generation have been receiving more attention, and therefore, the safety of electrochemical energy storage systems has also received more attention.
The existing safety system generally ensures the safety of the energy storage system by controlling to switch off the fault through software when a certain module in the electrochemical energy storage system is monitored to be in fault. Firstly, the energy storage system has a complex structure, and intermediate relays among modules are expanded more, so that signal transmission is also complex; secondly, when the energy storage system fails, the software control needs to perform logic judgment and then control, so that the safety action is delayed; finally, the failure of the software control function easily causes the loss of the system safety function, and the reliability is low. Therefore, an energy storage safety control system with fast response and high reliability of safety control signals is needed.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide an energy storage safety control system and method, and aims to solve the technical problems of slow response and low reliability of safety control signals of the conventional energy storage system.
In order to achieve the above object, the present invention provides an energy storage safety control system, including: the system comprises a safety chain module, an energy storage management module and a main circuit breaker;
the safety chain module is connected with the energy storage management module, and both the safety chain module and the energy storage management module are connected with the main circuit breaker;
the safety chain module is used for sending a shutdown signal to the main circuit breaker when a fault signal and/or an abnormal signal are/is monitored, wherein the fault signal is generated by the energy storage management module when the failure of the software control function is detected, and the abnormal signal is generated by the safety chain module when the abnormal condition of a target energy storage system is monitored;
the safety chain module is further used for sending the abnormal signal to the energy storage management module so that the energy storage management module sends a shutdown signal to the main circuit breaker;
and the main circuit breaker is used for controlling the target energy storage system to stop when the stop signal is received.
Optionally, the safety chain module comprises: a signal monitoring submodule and a system safety relay;
one end of the signal monitoring submodule is connected with the system safety relay through a dry contact, the other end of the system safety relay is connected with the main circuit breaker, and the other end of the signal monitoring submodule is connected with the energy storage management module;
the signal monitoring submodule is used for disconnecting a dry contact connected with the system safety relay when the target energy storage system is monitored to have an abnormal condition;
the system safety relay is used for sending the shutdown signal to the main circuit breaker after any dry contact is disconnected;
the signal monitoring sub-module is further configured to send an abnormal signal to the energy storage management module when the target energy storage system is monitored to have the abnormal condition;
and the signal monitoring submodule is also used for disconnecting a dry contact connected with the system safety relay after receiving the fault signal transmitted by the energy storage management module.
Optionally, the abnormal condition includes an early warning condition and an overrun condition, the abnormal signal includes an early warning signal and an overrun signal, and the signal monitoring sub-module includes: the device comprises an early warning monitoring unit, a threshold value monitoring unit and a fault protection unit;
the early warning monitoring unit, the threshold monitoring unit and the fault protection unit are all connected with the system safety relay through dry contacts, and the early warning monitoring unit, the threshold monitoring unit and the fault protection unit are all connected with the energy storage management module;
the early warning monitoring unit is used for monitoring whether the early warning condition exists in the target energy storage system or not and disconnecting a dry contact connected with the system safety relay when the early warning condition exists
The threshold monitoring unit is used for monitoring whether the target energy storage system has the overrun condition and disconnecting a dry contact connected with the system safety relay when the overrun condition is monitored;
the fault protection unit is used for disconnecting a dry contact connected with the system safety relay when receiving the fault signal transmitted by the energy storage management module;
the early warning monitoring unit is further configured to send the early warning signal to the energy storage management module when the early warning condition is monitored;
the threshold monitoring unit is further configured to send the overrun signal to the energy storage management module when the overrun condition is monitored.
Optionally, the warning signal comprises: fire control signal and scram signal, early warning monitoring unit includes: a fire-fighting subunit and an emergency stop subunit;
the fire-fighting subunit and the emergency stop subunit are connected with the system safety relay through dry contacts, and are connected with the energy storage management module;
the fire-fighting subunit is used for sending the fire-fighting signal to the energy storage management module after monitoring the fire-fighting early warning signal;
the emergency stop subunit is used for sending the emergency stop signal to the energy storage management module after monitoring an emergency stop input signal;
the fire-fighting subunit is also used for disconnecting a dry contact connected with the system safety relay after monitoring the fire-fighting early warning signal;
and the emergency stop subunit is also used for disconnecting a dry contact connected with the system safety relay after the emergency stop input signal is monitored.
Optionally, the overrun signal comprises: a battery fault signal and an output fault signal, the threshold monitoring unit comprising: a battery aerosol subunit and a safety meter subunit;
the battery aerosol subunit and the safety electric meter subunit are connected with the system safety relay through dry joints, and are connected with the energy storage management module;
the battery aerosol subunit is used for sending the battery fault signal to the energy storage management module when the aerosol concentration inside the battery module of the target energy storage system is monitored to be greater than a preset concentration threshold value;
the safety electric meter subunit is used for reading a real-time value of an output parameter of the target energy storage system and sending the output fault signal to the energy storage management module when the real-time value of the output parameter is monitored to exceed a preset output threshold value;
the battery aerosol subunit is also used for disconnecting a dry contact connected with the system safety relay when monitoring that the aerosol concentration in the battery module of the target energy storage system is greater than the preset concentration threshold value;
and the safety electric meter subunit is also used for disconnecting a dry contact connected with the system safety relay when the real-time numerical value of the output parameter is monitored to exceed the preset output threshold value.
Optionally, the energy storage management module includes a fire controller, an EMS, and a BMS;
wherein the fire controller, the EMS and the BMS are all connected with the safety chain module, and the BMS is connected with the main breaker;
the fire-fighting controller is used for sending a fire-fighting alarm signal to the EMS after receiving the fire-fighting signal;
the EMS is used for controlling the target energy storage system to stop through the software control function after receiving the fire-fighting alarm signal, the emergency stop signal and/or the output fault signal;
and the BMS is used for controlling the target energy storage system to stop through the software control function after receiving the battery fault signal.
Optionally, the energy storage management module further includes a PCS connected to the EMS and the BMS respectively
The PCS is used for sending an abnormal operation signal to the EMS and/or the BMS when the operation fault of the target energy storage system is monitored;
correspondingly, the EMS is also used for controlling the PCS to be shut down through the software control function after receiving the abnormal operation signal;
and the BMS is also used for controlling the PCS to stop through the software control function after receiving the abnormal operation signal.
Optionally, the EMS is further configured to generate the fault signal and send the fault signal to the safety chain module when detecting that a software control function is disabled;
and the BMS is also used for generating the fault signal and sending the fault signal to the safety chain module when detecting that the software control function is invalid.
Optionally, the BMS is further configured to control the battery cluster corresponding to the abnormal battery parameter to stop operating when the abnormal battery parameter of the target energy storage system is monitored.
In addition, in order to achieve the above object, the present invention further provides an energy storage safety control method, including the following steps:
monitoring whether a fault signal and/or an abnormal signal exist in a target energy storage system, wherein the fault signal is generated by an energy storage management module when detecting that a software control function is invalid, and the abnormal signal is generated when monitoring that the target energy storage system has an abnormal condition;
when a fault signal and/or an abnormal signal exist in the target energy storage system, a shutdown signal is sent to a main circuit breaker, so that the main circuit breaker controls the target energy storage system to shut down when receiving the shutdown signal.
The invention discloses an energy storage safety control system and a method, wherein the system comprises: the system comprises a safety chain module, an energy storage management module and a main circuit breaker; the safety chain module is used for sending a shutdown signal to the main circuit breaker when a fault signal and/or an abnormal signal are/is monitored, the fault signal is generated by the energy storage management module when the failure of the software control function is detected, and the abnormal signal is generated by the safety chain module when the abnormal condition of the target energy storage system is monitored; the safety chain module is also used for sending an abnormal signal to the energy storage management module so that the energy storage management module sends a shutdown signal to the main circuit breaker; and the main breaker is used for controlling the target energy storage system to stop when receiving the stop signal. Compared with the conventional safety system which can only realize safety control through software and has slow response of control signals, the invention directly inputs fault signals and/or abnormal signals of the target energy storage system into the main circuit breaker by constructing the safety chain module independent of the target energy storage system, so that the main circuit breaker controls the target energy storage system to stop.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of an energy storage safety control system according to the present invention;
fig. 2 is a schematic structural diagram of a safety chain module in a first embodiment of the energy storage safety control system according to the present invention;
FIG. 3 is a schematic structural diagram of a second embodiment of the energy storage safety control system according to the present invention;
FIG. 4 is a schematic structural diagram of a third embodiment of the energy storage safety control system according to the present invention;
FIG. 5 is a schematic diagram of the energy storage safety control system of the present invention;
FIG. 6 is a signal diagram of the energy storage safety control system according to the present invention;
FIG. 7 is a flowchart illustrating a first embodiment of a method for controlling energy storage safety according to the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments based on the embodiments of the present invention, and all embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the descriptions relating to "first", "second", etc. in the embodiments of the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of the energy storage safety control system of the present invention.
As shown in fig. 1, the energy storage safety control system includes: a safety chain module 10, an energy storage management module 20 and a main circuit breaker 30;
the safety chain module 10 is connected with the energy storage management module 20, and both the safety chain module 10 and the energy storage management module 20 are connected with the main circuit breaker 30;
the safety chain module 10 is configured to send a shutdown signal to the main circuit breaker 30 when a fault signal and/or an abnormal signal is monitored, where the fault signal is generated by the energy storage management module 20 when a software control function failure is detected, and the abnormal signal is generated when the safety chain module 10 monitors that an abnormal condition exists in a target energy storage system;
it should be noted that the safety chain module 10 may be a newly added link structure for safety control, and the safety chain module 10 is independent of the original energy storage control system, and serves as redundancy of a safety function, so as to enhance the safety of the target energy storage system.
The safety chain module 10 is further configured to send the abnormal signal to the energy storage management module 20, so that the energy storage management module 20 sends a shutdown signal to the main circuit breaker 30;
it should be noted that the energy storage management module 20 may be an important component of an original energy storage control system, and is mainly used for monitoring whether a target energy storage system is operating normally, and for implementing safety guarantee of the target energy storage system through a software control function. The control management module in the energy storage management system has a self-checking function, so that in this embodiment, once the energy storage management system monitors that the software control function is invalid, a fault signal can be directly output to the safety chain module 10, so as to send a shutdown signal to the main breaker 30.
It can be understood that, although the safety chain module 10 is added in the embodiment to control the target energy storage system to open the main circuit through the main circuit breaker 30 when there is an abnormal condition, the control function of the original energy storage control system can still be used, so that a single fault of any part of the control functions of the safety chain module 10 and the original energy storage control system does not cause the failure of the safety function of the target energy storage system. The control function of the original energy storage control system is mainly realized by the energy storage management module 20, so that when the safety chain module 10 monitors that the target energy storage system has an abnormal condition, an abnormal signal needs to be sent to the energy storage management module 20, so that the energy storage management module 20 sends a shutdown signal to the main circuit breaker 30, thereby disconnecting the main circuit and realizing the protection of the target energy storage system.
Further, the description is made with reference to fig. 2 for the convenience of understanding, but this solution is not limited. Fig. 2 is a schematic structural diagram of a safety chain module 10 in a first embodiment of the energy storage safety control system of the present invention, in which the safety chain module 10 includes: a signal monitoring submodule 101 and a system safety relay 102;
one end of the signal monitoring submodule 101 is connected with the system safety relay 102 through a dry contact, the other end of the system safety relay 102 is connected with the main circuit breaker 30, and the other end of the signal monitoring submodule 101 is connected with the energy storage management module 20;
the signal monitoring submodule 101 is configured to disconnect a dry contact connected to the system safety relay 102 when it is monitored that the target energy storage system has an abnormal condition;
the system safety relay 102 is configured to send the shutdown signal to the main circuit breaker 30 after any dry contact is disconnected;
the signal monitoring submodule 101 is further configured to send an abnormal signal to the energy storage management module 20 when the abnormal condition of the target energy storage system is monitored;
the signal monitoring submodule 101 is further configured to disconnect a dry contact connected to the system safety relay 102 after receiving the fault signal transmitted by the energy storage management module 20.
It should be noted that the dry contact is an electrical switch having 2 closed and open states, and all dry contacts are closed and the system safety relay 102 is also closed in the normal operation state of the target energy storage system. Once the signal monitoring sub-module 101 receives the fault signal transmitted by the energy storage management module 20 and/or monitors that the target energy storage system is abnormal, the system safety relay 102 is also turned off corresponding to the disconnection of the dry contact, so as to output a shutdown signal to the main circuit breaker 30, thereby ensuring the safety of the target energy storage system. In this embodiment, the system safety relay 102 can accept safety input in the form of dry contacts, and can determine through the internal circuit, and output a switching signal to the control circuit of the device with certainty.
And the main breaker 30 is used for controlling the target energy storage system to stop when the stop signal is received.
It should be noted that the main circuit breaker 30 may be a main switch for turning on and off a power supply or a main circuit of the target energy storage system, and when a fault of the target energy storage system is detected, the main circuit breaker 30 can be turned off rapidly to perform a protection function. The shutdown signal may be a shunt trip signal sent by the energy storage management system and/or the system safety relay 102 to the main circuit breaker 30, and the main circuit breaker 30 cuts off the power supply of the target energy storage system or the main circuit after receiving the shunt trip signal.
In a specific implementation, when a fault condition or an abnormal condition of a target energy storage system is monitored, the signal monitoring sub-module 101, on one hand, directly accesses a fault signal and/or an abnormal signal of the target energy storage system to the system safety relay 102, so as to directly break the main circuit breaker 30, and on the other hand, when a fault condition of the target energy storage system is monitored, sends an abnormal signal to the energy storage management module 20, so that the energy storage management module 20 sends a shutdown signal to the main circuit breaker 30, so as to break the main circuit breaker 30.
The embodiment discloses an energy storage safety control system, this system includes: a safety chain module 10, an energy storage management module 20 and a main circuit breaker 30; the safety chain module 10 is configured to send a shutdown signal to the main circuit breaker 30 when a fault signal and/or an abnormal signal is monitored, where the fault signal is generated by the energy storage management module 20 when the failure of the software control function is detected, and the abnormal signal is generated when the safety chain module 10 monitors that an abnormal condition exists in a target energy storage system; the safety chain module 10 is further configured to send an abnormal signal to the energy storage management module 20, so that the energy storage management module 20 sends a shutdown signal to the main circuit breaker 30; and the main breaker 30 is used for controlling the target energy storage system to stop when receiving the stop signal. Compared with the existing safety system which can only realize safety control through software and has slow response of control signals, the safety chain module 10 independent of the target energy storage system is constructed in the embodiment, the fault signal and/or the abnormal signal of the target energy storage system is directly input into the main circuit breaker 30, and the main circuit breaker 30 controls the target energy storage system to stop, so that the safety function signal (namely the fault signal and/or the abnormal signal) input of the target energy storage system is integrated, the target energy storage system is directly stopped when the target energy storage system has a problem, the complexity of the safety control system is reduced, the response speed of the safety control signal is increased, safety action can be independently performed when the software control function fails, the safety of the target energy storage system is further ensured, and the reliability of the target energy storage system is improved.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a second embodiment of the energy storage safety control system according to the present invention, and the second embodiment of the energy storage safety control system according to the present invention is provided based on the embodiment shown in fig. 2.
In this embodiment, the abnormal condition includes an early warning condition and an overrun condition, the abnormal signal includes an early warning signal and an overrun signal, and the signal monitoring sub-module 101 includes: an early warning monitoring unit 1011, a threshold monitoring unit 1012 and a fault protection unit 1013;
the early warning monitoring unit 1011, the threshold monitoring unit 1012 and the failure protection unit 1013 are all connected to the system safety relay 102 through dry contacts, and the early warning monitoring unit 1011, the threshold monitoring unit 1012 and the failure protection unit 1013 are all connected to the energy storage management module 20;
the early warning monitoring unit 1011 is configured to monitor whether the early warning condition exists in the target energy storage system, and disconnect a dry contact connected to the system safety relay 102 when the early warning condition exists;
the threshold monitoring unit 1012 is configured to monitor whether the target energy storage system has the overrun condition, and disconnect a dry contact connected to the system safety relay 102 when the overrun condition is monitored;
the fault protection unit 1013 is configured to disconnect a dry contact connected to the system safety relay 102 when receiving the fault signal transmitted by the energy storage management module 20;
the early warning monitoring unit 1011 is further configured to send the early warning signal to the energy storage management module 20 when the early warning condition is monitored;
the threshold monitoring unit 1012 is further configured to send the overrun signal to the energy storage management module 20 when it is monitored that the overrun condition exists.
It should be noted that the signal transmission directions of the early warning monitoring unit 1011, the threshold monitoring unit 1012 and the fault protection unit 1013 are different from those of the energy storage management module 20, wherein the early warning monitoring unit 1011 and the threshold monitoring unit 1012 send an early warning signal and an overrun signal to the energy storage management module 20 after monitoring that the early warning condition and the overrun condition exist in the target energy storage system, and the fault protection unit 1013 receives a fault signal transmitted by the energy storage management module 20 after self-detecting that the software control function in the energy storage management module 20 is faulty or out of service.
The early warning condition can be a fire-fighting early warning condition of the target energy storage system and can also be an emergency braking condition.
Further, as an implementation manner, the warning signal includes: fire control signal and scram signal, early warning monitoring unit 1011 includes: a fire-fighting subunit and an emergency stop subunit;
the fire-fighting subunit and the emergency stop subunit are both connected with the system safety relay 102 through dry contacts, and are both connected with the energy storage management module 20;
the fire-fighting subunit is configured to send a fire-fighting signal to the energy storage management module 20 after monitoring the fire-fighting early warning signal;
the emergency stop subunit is configured to send the emergency stop signal to the energy storage management module 20 after monitoring the emergency stop input signal;
the fire-fighting subunit is further configured to disconnect a dry contact connected to the system safety relay 102 after the fire-fighting early warning signal is monitored;
the scram subunit is further configured to disconnect a dry contact connected to the system safety relay 102 after the scram input signal is monitored.
It should be noted that, in this embodiment, the fire-fighting subunit may be a fire-fighting four-in-one sensor, and once the fire-fighting four-in-one sensor monitors smoke, temperature, or combustible gas signals (i.e., the fire-fighting early warning signal), the fire-fighting four-in-one sensor may directly output a dry contact point in addition to transmitting the fire-fighting signal to the energy storage management module 20, so that the system safety relay 102 operates.
In addition, the emergency stop input signal may be an input signal of an emergency stop button operated by a monitoring related person of the target energy storage system in an emergency, and the input signal is directly connected to the safety relay besides being connected to the energy storage management module 20.
The overrun condition may be a battery overrun fault condition or an output overrun fault condition.
Further, as an implementation, the overrun signal includes: a battery fault signal and an output fault signal, the threshold monitoring unit 1012 including: a battery aerosol subunit and a safety meter subunit;
wherein the battery aerosol subunit and the safety electric meter subunit are both connected with the system safety relay 102 through dry contacts, and the battery aerosol subunit and the safety electric meter subunit are both connected with the energy storage management module 20;
the battery aerosol subunit is configured to send the battery fault signal to the energy storage management module 20 when it is monitored that the aerosol concentration inside the battery module of the target energy storage system is greater than a preset concentration threshold;
the safety electric meter subunit is configured to read a real-time value of an output parameter of the target energy storage system, and send the output fault signal to the energy storage management module 20 when it is monitored that the real-time value of the output parameter exceeds a preset output threshold;
the battery aerosol subunit is further configured to disconnect a dry contact connected to the system safety relay 102 when the aerosol concentration inside the battery module of the target energy storage system is monitored to be greater than the preset concentration threshold;
the safety electric meter subunit is further configured to disconnect a dry contact connected to the system safety relay 102 when the real-time value of the output parameter is monitored to exceed the preset output threshold.
It should be noted that the battery aerosol subunit may be an aerosol sensor, the aerosol sensor is usually installed inside a battery module, and once the aerosol sensor monitors that the aerosol concentration inside the battery module is greater than a preset concentration threshold, the aerosol sensor may not only transmit information to the energy storage management module 20 through CAN bus communication, but also directly output a dry contact, so that the system safety relay 102 operates.
In addition, the safety electric meter subunit may read a real-time value of the voltage and current (i.e., the output parameter) at the output end of the target energy storage system, and if the safety electric meter monitors that the voltage and current of the target energy storage system exceed a preset output threshold, may directly output a dry contact to enable the system safety relay 102 to operate, or may send the output fault signal to the energy storage management module 20.
When the preset fire early warning condition and the emergency stop input signal are monitored in the target energy storage system, the aerosol concentration in the battery module of the target energy storage system is greater than the preset concentration threshold value, and the real-time value of the voltage and the current at the output end of the target energy storage system exceeds the preset output threshold value, the method can break the main circuit of the target energy storage system by sending an abnormal signal to the energy storage management module 20, and can break the main circuit breaker 30 and break the main circuit of the target energy storage system by breaking a dry contact connected with the system safety relay 102. In addition, after the energy storage management module 20 detects that the software control function therein is faulty or failed, it will also transmit a fault signal to the dry contact, so as to open the main circuit breaker 30 and the target energy storage system main circuit. Therefore, in the present embodiment, the defense warning signal, the emergency stop signal, the battery overrun fault signal, the output overrun fault signal, and the software control failure signal can all be directly connected to the system safety relay 102, and directly disconnect the main breaker 30, thereby integrating the system safety function signal input, and avoiding the software judgment delay, thereby reducing the system complexity and improving the reliability.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a third embodiment of the energy storage safety control system according to the present invention, and the third embodiment of the energy storage safety control system according to the present invention is provided based on the embodiment shown in fig. 3.
In this embodiment, the energy storage management module 20 includes a fire controller 201, an EMS202, and a BMS203;
wherein the fire controller 201, the EMS202 and the BMS203 are connected to the safety chain module 10, and the BMS203 is connected to the main breaker 30;
the fire protection controller 201 is configured to send a fire protection alarm signal to the EMS202 after receiving the fire protection signal;
the EMS202 is used for controlling the target energy storage system to stop through the software control function after receiving the fire-fighting alarm signal, the emergency stop signal and/or the output fault signal;
and the BMS203 is used for controlling the target energy storage system to stop through the software control function after receiving the battery fault signal.
It should be noted that the EMS202 may be connected to the main breaker 30, specifically, the connection between the BMS203 and the EMS202 to the main breaker 30, which is not limited in this embodiment. The EMS202, which may be an Energy management System (Energy management System), is mainly used for controlling internal Energy of the target Energy storage System, maintaining power balance of the target Energy storage System, and ensuring normal operation of the target Energy storage System; the BMS203 may be a Battery management System (Battery management System) and is mainly used for monitoring, evaluating, protecting, and balancing a Battery side signal of a target energy storage System; the fire-fighting controller 201 not only receives the fire-fighting early warning signal transmitted by the safety chain module 10, but also receives the fire-fighting smoke sensation, the temperature sensation and the monitoring signal of the combustible gas sensor in the target energy storage system, and the fire-fighting controller 201 and the EMS202 system establish communication through an RS485 bus and transmit the fire-fighting fire warning signal.
In addition, the EMS202 and BMS203 may also self-check and generate and transmit a fault signal to the safety chain module 10 when a software control function failure is detected. And when the BMS203 can also monitor that abnormal battery parameters exist in the target energy storage system through the battery voltage and temperature acquisition sensors, control the battery clusters corresponding to the abnormal battery parameters to stop running, and the abnormal battery parameters may include: and the voltage, the current, the temperature and other analog quantities of the battery system of the target energy storage system.
Further, as an implementation manner, the energy storage management module 20 further includes a PCS204, where the PCS204 is connected to the EMS202 and the BMS203 respectively;
the PCS204 is configured to send an abnormal operation signal to the EMS202 and/or the BMS203 when the operation fault of the target energy storage system is monitored;
correspondingly, the EMS202 is further configured to control the PCS204 to stop through the software control function after receiving the abnormal operation signal;
the BMS203 is further configured to control the PCS204 to stop through the software control function after receiving the operation abnormal signal.
It should be noted that, the PCS204 may be a Power Conversion System (Power Conversion System), the PCS204 may control a charging and discharging process of a storage battery of a target energy storage System, perform ac-dc Conversion, and directly supply Power to an ac load without a Power grid, the PCS204 receives a background control instruction through communication, and controls the converter to charge or discharge the storage battery according to a symbol and a size of the Power instruction, so as to adjust active Power and reactive Power of the Power grid, and in practical application, the PCS204 may communicate with the BMS203 through a CAN bus interface or an RS485 to obtain state information of the storage battery pack to realize protective charging and discharging of the storage battery, so as to ensure safe operation of the storage battery; the PCS204 and EMS202 may communicate via ethernet. If the PCS204 monitors that the operating voltage or current (namely the preset operating parameter) of the storage battery of the target energy storage system exceeds a preset operating threshold value (namely a preset storage battery voltage value and a preset storage battery current value), an operating abnormal signal is transmitted to the EMS202 and/or the BMS203 through communication, and then the EMS202 and/or the BMS203 performs logic judgment through a software control function to control the PCS204 to stop.
In this embodiment, the energy storage management module 20 includes a fire controller 201, an EMS202, and a BMS203; the fire-fighting controller 201 is used for sending a fire-fighting alarm signal to the EMS202 after receiving the fire-fighting signal; the EMS202 is used for controlling the target energy storage system to stop through a software control function after receiving a fire-fighting alarm signal, an emergency stop signal and/or an output fault signal; and the BMS203 is used for controlling the target energy storage system to stop through a software control function after receiving the battery fault signal. In addition, the energy storage management module 20 further includes a PCS204, where the PCS204 is configured to send an abnormal operation signal to the EMS202 and/or the BMS203 when an operation failure of the target energy storage system is monitored (i.e., the battery operation voltage or current of the target energy storage system exceeds a preset battery voltage value and a preset battery current value); accordingly, the EMS202 and/or BMS203 controls the PCS204 to stop through the software control function upon receiving the operation abnormality signal. The software control function in this embodiment may exist simultaneously with the control function of the safety chain module 10, and the shutdown action of the target energy storage system is executed together, so as to ensure the safety of the target energy storage system. Therefore, the embodiment ensures that the safety control system cannot cause complete failure of the safety function when the control of the safety chain module 10 fails, and on the other hand, ensures the safety of the battery system in the target energy storage system, and further improves the reliability of the target energy storage system.
To sum up, fig. 5 and fig. 6 are taken as examples to illustrate the energy storage safety control system of the present invention, fig. 5 is a schematic diagram of the energy storage safety control system of the present invention, and fig. 6 is a signal schematic diagram of the energy storage safety control system of the present invention.
As can be seen from fig. 5, the present invention constructs a new energy storage system safety chain module independent of the energy storage control management module, and the safety chain module 10 mainly comprises a system safety relay 102, a fire-fighting subunit, an emergency stop subunit, a battery aerosol subunit, a safety electric meter subunit and a failure protection unit 1013, wherein the fire-fighting subunit, the emergency stop subunit, the battery aerosol subunit, the safety electric meter subunit and the failure protection unit 1013 are connected to the system safety relay 102 through dry contacts, and when any one of the fire-fighting subunit, the emergency stop subunit, the battery aerosol subunit, the safety electric meter subunit and the failure protection unit 1013 generates and outputs a signal when an abnormality or a failure is detected, the dry contacts are disconnected, the system safety relay 102 is also disconnected, and a shunt trip signal is sent out to enable the main circuit breaker 30 to shut off the overall circuit of the target energy storage system, so as to ensure the safety of the target energy storage system, which is convenient to understand and is not limited by referring to fig. 6. As can be seen from fig. 6, the safety signals involved in the energy storage safety control system constructed by the invention include abnormal signals and fault signals, wherein the abnormal signals are generated by the signal monitoring submodule 101 in the safety chain module 10 when it is monitored that the target energy storage system has an abnormal condition, and are sent to the system safety relay 102 and the energy storage management module 20 after being generated, and the fault signals are generated by the energy storage management module 20 when it is detected that the software control function fails, and are sent to the fault protection unit 1013 in the safety chain module 10 after being generated. The anomaly signal may include: the early warning signal is generated by the early warning monitoring unit 1011 when the early warning condition of the target energy storage system is monitored, and the overrun signal is generated by the threshold monitoring unit 1012 when the overrun condition of the target energy storage system is monitored. Wherein, early warning signal includes: the system comprises a fire protection signal and an emergency stop signal, wherein the fire protection signal is generated by a fire protection subunit when a fire protection early warning signal exists in a target energy storage system, and the emergency stop signal is generated by the emergency stop subunit when an emergency stop input signal exists in the target energy storage system; the overrun signal includes: the system comprises a battery fault signal and an output fault signal, wherein the battery fault signal is generated by a battery aerosol subunit when the concentration of aerosol inside a battery module of a target energy storage system is monitored to be greater than a preset concentration threshold value, and the output fault signal is generated by a safety electric meter subunit when the real-time numerical value of the output parameter of the target energy storage system exceeds the preset output threshold value.
Meanwhile, the software control function of the energy storage control management module 20 may also be operated synchronously, and the energy storage control management module 20 includes a fire protection controller 201, an EMS202, a BMS203, and a PCS204, wherein the BMS203, the EMS202, and the fire protection controller 201 also receive signals transmitted from a fire protection subunit, an emergency stop subunit, a battery aerosol subunit, and a safety meter subunit, thereby sending a stop signal to the main breaker 30 through the software control function to turn off the overall circuit of the target energy storage system. The EMS202 and the BMS203 also have a self-checking function, can generate a fault signal and send the fault signal to the fault protection unit 1013 when detecting that the software control function is invalid, and the BMS203 can also control the battery cluster corresponding to the abnormal battery parameters to stop when monitoring that the abnormal battery parameters exist in the target energy storage system through the battery voltage and temperature acquisition sensors. In addition, the PCS204 is used for monitoring and guaranteeing the operation safety of the storage battery, if the PCS204 monitors that the operation voltage or current (i.e., preset operation parameters) of the storage battery of the target energy storage system exceeds a preset operation threshold (i.e., a preset storage battery voltage value and a preset storage battery current value), an operation abnormal signal is transmitted to the EMS202 and/or the BMS203 through communication, and then the EMS202 and/or the BMS203 performs logic judgment through a software control function to control the PCS204 to stop.
An embodiment of the present invention provides an energy storage safety control method, and referring to fig. 7, fig. 7 is a flowchart illustrating a first embodiment of the energy storage safety control method according to the present invention.
In this embodiment, the energy storage safety control method includes the following steps:
step S10: monitoring whether a fault signal and/or an abnormal signal exist in a target energy storage system, wherein the fault signal is generated by an energy storage management module 20 when detecting that a software control function fails, and the abnormal signal is generated when monitoring that the target energy storage system has an abnormal condition;
step S20: when a fault signal and/or an abnormal signal in the target energy storage system is monitored, a shutdown signal is sent to the main circuit breaker 30, so that the main circuit breaker 30 controls the target energy storage system to be shut down when receiving the shutdown signal.
In the embodiment, whether a fault signal and/or an abnormal signal exist in the target energy storage system is monitored, the fault signal is generated by the energy storage management module 20 when the failure of the software control function is detected, and the abnormal signal is generated when the abnormal condition of the target energy storage system is monitored; when a fault signal and/or an abnormal signal exists in the target energy storage system, a shutdown signal is sent to the main circuit breaker 30, so that the main circuit breaker 30 controls the target energy storage system to be shut down when receiving the shutdown signal. Compared with the existing safety system which can only realize safety control through software and control slow response of signals, the safety chain module 10 independent of the target energy storage system is constructed in the embodiment, fault signals and/or abnormal signals of the target energy storage system are directly input into the main circuit breaker 30, and the main circuit breaker 30 controls the target energy storage system to stop, so that the safety function signal (namely fault signals and/or abnormal signals) input of the target energy storage system is integrated, the target energy storage system is directly stopped when the target energy storage system has a problem, the complexity of the safety control system is reduced, the response speed of the safety control signals is increased, safety actions can be independently performed when the software control function fails, the safety of the target energy storage system is further ensured, and the reliability of the target energy storage system is improved.
The specific implementation process of the energy storage safety control method may refer to the description of the energy storage safety control system, and is not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or system comprising the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (10)
1. An energy storage safety control system, characterized in that the energy storage safety control system comprises: the system comprises a safety chain module, an energy storage management module and a main circuit breaker;
the safety chain module is connected with the energy storage management module, and both the safety chain module and the energy storage management module are connected with the main circuit breaker;
the safety chain module is used for sending a shutdown signal to the main circuit breaker when a fault signal and/or an abnormal signal are/is monitored, wherein the fault signal is generated by the energy storage management module when the failure of the software control function is detected, and the abnormal signal is generated by the safety chain module when the abnormal condition of a target energy storage system is monitored;
the safety chain module is further used for sending the abnormal signal to the energy storage management module so that the energy storage management module sends a shutdown signal to the main circuit breaker;
and the main circuit breaker is used for controlling the target energy storage system to stop when the stop signal is received.
2. The energy storage safety control system of claim 1, wherein the safety chain module comprises: a signal monitoring submodule and a system safety relay;
one end of the signal monitoring submodule is connected with the system safety relay through a dry contact, the other end of the system safety relay is connected with the main circuit breaker, and the other end of the signal monitoring submodule is connected with the energy storage management module;
the signal monitoring submodule is used for disconnecting a dry contact connected with the system safety relay when the target energy storage system is monitored to have an abnormal condition;
the system safety relay is used for sending the shutdown signal to the main circuit breaker after any dry contact is disconnected;
the signal monitoring sub-module is further configured to send an abnormal signal to the energy storage management module when the abnormal condition of the target energy storage system is monitored;
and the signal monitoring submodule is also used for disconnecting a dry contact connected with the system safety relay after receiving the fault signal transmitted by the energy storage management module.
3. The energy storage safety control system according to claim 2, wherein the abnormal condition includes an early warning condition and an over-limit condition, the abnormal signal includes an early warning signal and an over-limit signal, and the signal monitoring sub-module includes: the device comprises an early warning monitoring unit, a threshold value monitoring unit and a fault protection unit;
the early warning monitoring unit, the threshold monitoring unit and the fault protection unit are all connected with the system safety relay through dry contacts, and the early warning monitoring unit, the threshold monitoring unit and the fault protection unit are all connected with the energy storage management module;
the early warning monitoring unit is used for monitoring whether the early warning condition exists in the target energy storage system or not and disconnecting a dry contact connected with the system safety relay when the early warning condition exists
The threshold monitoring unit is used for monitoring whether the target energy storage system has the overrun condition and disconnecting a dry contact connected with the system safety relay when the overrun condition is monitored;
the fault protection unit is used for disconnecting a dry contact connected with the system safety relay when receiving the fault signal transmitted by the energy storage management module;
the early warning monitoring unit is further used for sending the early warning signal to the energy storage management module when the early warning condition is monitored;
the threshold monitoring unit is further configured to send the overrun signal to the energy storage management module when the overrun condition is monitored.
4. The energy storage safety control system of claim 3, wherein the early warning signal comprises: fire control signal and scram signal, early warning monitoring unit includes: a fire-fighting subunit and an emergency stop subunit;
the fire-fighting subunit and the emergency stop subunit are connected with the system safety relay through dry contacts, and are connected with the energy storage management module;
the fire-fighting subunit is used for sending the fire-fighting signal to the energy storage management module after monitoring the fire-fighting early warning signal;
the emergency stop subunit is used for sending the emergency stop signal to the energy storage management module after monitoring an emergency stop input signal;
the fire-fighting subunit is also used for disconnecting a dry contact connected with the system safety relay after monitoring the fire-fighting early warning signal;
and the emergency stop subunit is also used for disconnecting a dry contact connected with the system safety relay after the emergency stop input signal is monitored.
5. The energy storage safety control system of claim 3, wherein the overrun signal comprises: a battery fault signal and an output fault signal, the threshold monitoring unit comprising: a battery aerosol subunit and a safety meter subunit;
the battery aerosol subunit and the safety electric meter subunit are both connected with the system safety relay through dry contacts, and are both connected with the energy storage management module;
the battery aerosol subunit is used for sending the battery fault signal to the energy storage management module when monitoring that the aerosol concentration in the battery module of the target energy storage system is greater than a preset concentration threshold value;
the safety electric meter subunit is used for reading a real-time numerical value of an output parameter of the target energy storage system and sending the output fault signal to the energy storage management module when the real-time numerical value of the output parameter is monitored to exceed a preset output threshold value;
the battery aerosol subunit is further used for disconnecting a dry contact connected with the system safety relay when the concentration of the aerosol in the battery module of the target energy storage system is monitored to be greater than the preset concentration threshold;
and the safety electric meter subunit is also used for disconnecting a dry contact connected with the system safety relay when the real-time numerical value of the output parameter is monitored to exceed the preset output threshold value.
6. The energy storage safety control system according to claim 1, wherein the energy storage management module comprises a fire controller, an EMS, and a BMS;
wherein the fire controller, the EMS, and the BMS are all connected to the safety chain module, and the BMS is connected to the main breaker;
the fire-fighting controller is used for sending a fire-fighting alarm signal to the EMS after receiving the fire-fighting signal;
the EMS is used for controlling the target energy storage system to stop through the software control function after receiving the fire-fighting alarm signal, the emergency stop signal and/or the output fault signal;
and the BMS is used for controlling the target energy storage system to stop through the software control function after receiving the battery fault signal.
7. The energy storage safety control system according to claim 6, wherein the energy storage management module further comprises a PCS connected to the EMS and the BMS, respectively
The PCS is used for sending an abnormal operation signal to the EMS and/or the BMS when the operation fault of the target energy storage system is monitored;
correspondingly, the EMS is also used for controlling the PCS to stop through the software control function after receiving the abnormal operation signal;
and the BMS is also used for controlling the PCS to stop through the software control function after receiving the abnormal operation signal.
8. The energy storage safety control system according to claim 6, wherein the EMS is further configured to generate the fault signal and send the fault signal to the safety chain module upon detection of a software control function failure;
the BMS is further used for generating the fault signal and sending the fault signal to the safety chain module when the failure of the software control function is detected.
9. The energy storage safety control system according to any one of claims 6-8, wherein the BMS is further configured to control the battery cluster corresponding to the abnormal battery parameter to stop operating when the abnormal battery parameter is monitored in the target energy storage system.
10. An energy storage safety control method is characterized by comprising the following steps:
monitoring whether a fault signal and/or an abnormal signal exist in a target energy storage system, wherein the fault signal is generated by an energy storage management module when detecting that a software control function is invalid, and the abnormal signal is generated when monitoring that the target energy storage system has an abnormal condition;
when a fault signal and/or an abnormal signal exist in the target energy storage system, a shutdown signal is sent to a main circuit breaker, so that the main circuit breaker controls the target energy storage system to shut down when receiving the shutdown signal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014903A (en) * | 2023-03-27 | 2023-04-25 | 江苏林洋亿纬储能科技有限公司 | Coordination control method and system based on energy storage safety chain identification |
| CN116131311A (en) * | 2023-04-07 | 2023-05-16 | 深圳市首航新能源股份有限公司 | Energy storage system and protection method thereof |
| CN116488352A (en) * | 2023-06-20 | 2023-07-25 | 北京航能绿电科技有限公司 | Circuit safety monitoring and early warning method for energy storage power station |
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2022
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116014903A (en) * | 2023-03-27 | 2023-04-25 | 江苏林洋亿纬储能科技有限公司 | Coordination control method and system based on energy storage safety chain identification |
| CN116131311A (en) * | 2023-04-07 | 2023-05-16 | 深圳市首航新能源股份有限公司 | Energy storage system and protection method thereof |
| CN116488352A (en) * | 2023-06-20 | 2023-07-25 | 北京航能绿电科技有限公司 | Circuit safety monitoring and early warning method for energy storage power station |
| CN116488352B (en) * | 2023-06-20 | 2023-09-12 | 北京航能绿电科技有限公司 | Circuit safety monitoring and early warning method for energy storage power station |
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