CN-121978533-A - Method, equipment and storage medium for inquiring abnormal state of battery cell in energy storage cabinet

CN121978533ACN 121978533 ACN121978533 ACN 121978533ACN-121978533-A

Abstract

An abnormal state query method, equipment and storage medium for a battery cell in an energy storage cabinet relate to the technical field of battery cell management; the method comprises the steps of generating a local abnormal event message containing an abnormal source identifier when any cell monomer in an energy storage cabinet is monitored to be abnormal based on a preset local abnormal triggering condition, broadcasting the abnormal event message to other cell monomer nodes in the energy storage cabinet, polymerizing state information of each cell monomer node in abnormal and associated monitoring states at a local network level based on a preset polymerization triggering strategy, judging the cell monomer in the associated monitoring state by the other cell monomer nodes according to the received abnormal event message and the association relation topology of the cell monomer nodes and the abnormal source respectively, and uploading the aggregated state abstract to a query terminal through single transaction communication. The method aims to improve technical support for safe and efficient operation and maintenance of a large-scale energy storage system.

Inventors

Luo Ruiqiao
DU GUANGDONG
CHENG CHAOLONG
ZHOU YI
LIU LEI
YANG YUE

Assignees

深圳市盛路物联通讯技术有限公司
深能源(深圳)创新技术有限公司
深能北方能源控股有限公司

Dates

Publication Date: 20260505
Application Date: 20260127

Claims (10)

1. The method for inquiring the abnormal state of the battery cell in the energy storage cabinet is characterized by comprising the following steps: Based on a preset local abnormal triggering condition, when any cell unit in the energy storage cabinet is monitored to be abnormal, generating a local abnormal event message containing an abnormal source identifier; Broadcasting the abnormal event message to other cell monomer nodes in the energy storage cabinet; based on a preset aggregation triggering strategy, aggregating state information of each cell monomer node in an abnormal state and an associated monitoring state at a local network level, wherein the cell monomers in the associated monitoring state are judged by other cell monomer nodes according to the received abnormal event message and according to the association relation topology between the cell monomers and an abnormal source; and uploading the aggregated state abstract to the query terminal through single transaction communication.
2. The method of claim 1, wherein the preset local exception triggering condition comprises: Acquiring a health degree score locally calculated in real time by a battery cell, and triggering when the health degree score is lower than a first threshold; or based on the transverse comparison result of the parameters between the adjacent cell monomers, triggering when the deviation between the cell monomer parameters and the average value of the adjacent cell monomers exceeds a second threshold value and the self health degree score is lower than a third threshold value, wherein the second threshold value is dynamically adjusted according to the topological compactness of the cell cluster.
3. The method of claim 1, wherein said determining whether to enter an association monitoring state comprises: Analyzing a physical position identifier in the abnormal event message, and determining a plurality of battery cell monomers which are adjacent to the abnormal battery cell monomers in electrical connection or physical space as a primary association object according to a preset topological map in the energy storage cabinet; and if the abnormal type of the abnormal battery cell monomer belongs to the thermal diffusion risk type, the battery cell monomer which is positioned in the same air duct or the heat dissipation area is listed as a secondary related object.
4. The method of claim 1, wherein the preset aggregate trigger policy includes at least one of the monitored number of abnormal cell monomers accumulating to reach a preset first number threshold, the elapsed time since the first abnormal event message is generated reaching a preset aggregate time window threshold, or receiving an active broadcast query command from a query terminal.
5. The method of claim 4, wherein aggregating at the local network level when the aggregate trigger policy is the reception of an active broadcast query command from a query terminal, comprises: controlling each cell unit node to synchronously receive the active broadcast query instruction; screening abnormal cell single nodes with current states meeting filtering conditions in the active broadcast query instruction and associated monitoring nodes as response nodes; coordinating each response cell unit node to report respective state abstracts according to a preset multiple access rule in a preset response time window; And integrating the reported state abstracts at the local network level of the energy storage cabinet to form a unified aggregation state abstract.
6. A method according to claim 3, characterized in that the method further comprises: predicting potential propagation paths and influence ranges of the abnormal states based on the attributes of the abnormal battery cell monomers, the positions of the abnormal battery cell monomers in the topological map in the cabinet and the overall operation working conditions of the current energy storage cabinet; and generating an adjustment strategy based on the propagation path and the influence range, and writing the adjustment strategy into the aggregation state abstract for reporting.
7. The method of claim 1, wherein broadcasting the abnormal event message to other cell monomer nodes in the energy storage cabinet comprises: and sending the abnormal event message to other cell monomer nodes in the energy storage cabinet in a local multicast or broadcast mode.
8. An abnormal state inquiry device of an electric core in an energy storage cabinet is characterized by comprising: The generation module is used for generating a local abnormal event message containing an abnormal source identifier when any cell monomer in the energy storage cabinet is monitored to be abnormal based on a preset local abnormal triggering condition; The broadcasting module is used for broadcasting the abnormal event message to other cell monomer nodes in the energy storage cabinet; the aggregation module is used for aggregating the state information of each cell monomer node in abnormal and associated monitoring states at a local network level based on a preset aggregation triggering strategy, wherein the associated monitoring states are judged by other cell monomer nodes according to the received abnormal event message and the association relation topology of the cell monomer nodes and an abnormal source; and the uploading module is used for uploading the aggregated state abstract to the query terminal through single transaction communication.
9. A device for querying abnormal states of a battery cell in an energy storage cabinet, comprising a processor, a memory and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 7 when executing the computer program.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any one of claims 1 to 7.

Description

Method, equipment and storage medium for inquiring abnormal state of battery cell in energy storage cabinet Technical Field The application belongs to the technical field of battery management, and particularly relates to a method, equipment and a storage medium for inquiring abnormal states of a battery cell in an energy storage cabinet. Background With the rapid expansion of the scale of electrochemical energy storage power stations, energy storage cabinets consisting of hundreds to thousands of cells have become the core energy storage unit. In order to ensure the safety and the operation efficiency of the system, it is important to monitor the health state of each cell unit in the cabinet in real time and efficiently. However, the current mainstream battery cell state monitoring architecture faces serious challenges when dealing with sudden and concurrent abnormal events, and has become a bottleneck restricting operation and maintenance efficiency and system safety response. Disclosure of Invention In view of the above, the embodiment of the application provides a method, equipment and a storage medium for inquiring abnormal states of a battery cell in an energy storage cabinet, which aim to solve the problem of improving timeliness of sensing abnormal events in monitoring abnormal states of the battery cell in a scene of the energy storage cabinet and improve technical support for safe and efficient operation and maintenance of a large-scale energy storage system. The embodiment of the application provides a method for inquiring the abnormal state of a battery cell in an energy storage cabinet, which comprises the following steps: Based on a preset local abnormal triggering condition, when any cell unit in the energy storage cabinet is monitored to be abnormal, generating a local abnormal event message containing an abnormal source identifier; Broadcasting the abnormal event message to other cell monomer nodes in the energy storage cabinet; based on a preset aggregation triggering strategy, aggregating state information of each cell monomer node in an abnormal state and an associated monitoring state at a local network level, wherein the cell monomers in the associated monitoring state are judged by other cell monomer nodes according to the received abnormal event message and according to the association relation topology between the cell monomers and an abnormal source; and uploading the aggregated state abstract to the query terminal through single transaction communication. In an embodiment, the preset local abnormal triggering condition includes: Acquiring a health degree score locally calculated in real time by a battery cell, and triggering when the health degree score is lower than a first threshold; or based on the transverse comparison result of the parameters between the adjacent cell monomers, triggering when the deviation between the cell monomer parameters and the average value of the adjacent cell monomers exceeds a second threshold value and the self health degree score is lower than a third threshold value, wherein the second threshold value is dynamically adjusted according to the topological compactness of the cell cluster. In an embodiment, the determining whether to enter the association monitoring state includes: Analyzing a physical position identifier in the abnormal event message, and determining a plurality of battery cell monomers which are adjacent to the abnormal battery cell monomers in electrical connection or physical space as a primary association object according to a preset topological map in the energy storage cabinet; and if the abnormal type of the abnormal battery cell monomer belongs to the thermal diffusion risk type, the battery cell monomer which is positioned in the same air duct or the heat dissipation area is listed as a secondary related object. In an embodiment, the preset aggregation triggering strategy comprises the steps that the number of the monitored abnormal battery cell monomers reaches a preset first number threshold in an accumulated mode, the time length which passes from the generation of a first abnormal event message reaches a preset aggregation time window threshold, or at least one triggering condition in an active broadcast query instruction initiated by a query terminal is received. In an embodiment, when the aggregation trigger policy is that the active broadcast query instruction initiated by the query terminal is received, the aggregating at the local network level includes: a main control unit or each cell unit node in the energy storage cabinet synchronously receives the active broadcast query instruction; screening abnormal cell single nodes with current states meeting filtering conditions in the active broadcast query instruction and associated monitoring nodes as response nodes; coordinating each response cell unit node to report respective state abstracts according to a preset multiple access rule in a preset response time window