CN115580018A - Energy storage system safety monitoring method, device, equipment and storage medium - Google Patents

Energy storage system safety monitoring method, device, equipment and storage medium Download PDF

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Publication number
CN115580018A
CN115580018A CN202211273803.5A CN202211273803A CN115580018A CN 115580018 A CN115580018 A CN 115580018A CN 202211273803 A CN202211273803 A CN 202211273803A CN 115580018 A CN115580018 A CN 115580018A
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temperature
target
monitored
safety monitoring
energy storage
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李运生
陈鹏
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Sungrow Power Supply Co Ltd
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Sungrow Power Supply Co Ltd
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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
    • H02J13/00001—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 the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • 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
    • 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
    • H02J13/00022—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 wireless data transmission
    • 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
    • H02J13/00022—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 wireless data transmission
    • H02J13/00026—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 wireless data transmission involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
    • 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
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a method, a device and equipment for monitoring the safety of an energy storage system and a computer readable storage medium, wherein the method comprises the following steps: the method comprises the steps of obtaining temperature information respectively measured by each temperature measuring point and obtaining monitoring parameter information obtained by monitoring each battery cell to be monitored, wherein the whole space region where each battery cell to be monitored is located is divided into a hierarchical structure comprising at least one hierarchy, a plurality of space regions divided from each layer in the hierarchical structure are divided into a plurality of subspace regions in the next layer, and one temperature measuring point is arranged in each space region divided from each layer; and determining the safety monitoring result of the battery cell to be monitored according to the monitoring parameter analysis result corresponding to the battery cell to be monitored and the region temperature analysis result corresponding to the space region of at least one level where the battery cell to be monitored is located. The invention reduces the condition of false detection when the safety monitoring is carried out on the battery cell in the energy storage system, and improves the accuracy of the safety monitoring on the energy storage system.

Description

Energy storage system safety monitoring method, device, equipment and storage medium
Technology neighborhood
The invention relates to the technical field of energy storage systems, in particular to a method, a device and equipment for monitoring the safety of an energy storage system and a computer readable storage medium.
Background
With the accelerated propulsion of energy storage systems, the safety issue of energy storage systems is a core concern. In the operation process of the energy storage system, a battery cell may cause fire due to the occurrence of internal short circuit and other conditions, so that the safety state of the cell needs to be monitored in the operation process of the energy storage system, and preventive and protective measures are taken to find problems as soon as possible. Currently, the safety monitoring of the energy storage system is realized by independently sampling the temperature of each battery cell and giving an alarm when the temperature of a single battery cell is too high. The safety monitoring method does not consider the relevance among the battery cells, so that the problem of judgment errors can be caused.
Disclosure of Invention
The invention mainly aims to provide a method, a device and equipment for monitoring the safety of an energy storage system and a computer readable storage medium, and aims to provide a safety monitoring scheme of the energy storage system, which considers the incidence relation among all battery cores of the energy storage system, and improves the accuracy of safety monitoring.
In order to achieve the above object, the present invention provides a method for monitoring safety of an energy storage system, comprising the following steps:
the method comprises the steps of obtaining temperature information respectively measured at each temperature measuring point in the running process of an energy storage system, and obtaining monitoring parameter information obtained by monitoring each battery cell to be monitored in the running process of the energy storage system, wherein the whole space region where each battery cell to be monitored is located is divided into a hierarchical structure comprising at least one hierarchy, a plurality of space regions divided from each layer in the hierarchical structure are divided into a plurality of subspace regions in the next layer, and one temperature measuring point is arranged in each space region divided from each layer;
and determining a safety monitoring result of the electric core to be monitored according to a monitoring parameter analysis result corresponding to the electric core to be monitored and a region temperature analysis result corresponding to a space region of at least one hierarchy where the electric core to be monitored is located, wherein the monitoring parameter analysis result is obtained by analyzing the monitoring parameter information of the electric core to be monitored, and the region temperature analysis result is obtained by analyzing the temperature information of the temperature measuring point arranged in the space region.
Optionally, the step of determining the safety monitoring result of the to-be-monitored battery cell according to the monitoring parameter analysis result corresponding to the to-be-monitored battery cell and the area temperature analysis result corresponding to the spatial area of the at least one hierarchy where the to-be-monitored battery cell is located includes:
taking the uppermost layer of the hierarchical structure as a target hierarchy, taking each space region divided from the uppermost layer as a target space region, and comparing the temperature information corresponding to the temperature measuring points arranged in each target space region to obtain a temperature information comparison result;
when abnormal space regions exist in the target space regions according to the temperature information comparison result, if the target hierarchy is the lowest layer in the hierarchical structure, each battery cell to be monitored in the abnormal space regions is used as a target battery cell, and a safety monitoring result of the target battery cell is obtained according to the monitoring parameter information analysis of the target battery cell;
if the target level is not the lowest level in the hierarchical structure, updating the target level to be the next level of the target level, updating the target space region to be each sub-space region divided at the next level of the abnormal space region, and returning to execute the step of comparing the temperature information corresponding to the temperature measuring point arranged in each target space region to obtain a temperature information comparison result.
Optionally, the temperature information includes at least one temperature parameter value, and the step of comparing the temperature information corresponding to the temperature measurement points set in each of the target space regions to obtain a temperature information comparison result includes:
calculating the central value of the temperature parameter values of the same item corresponding to each target temperature measuring point, and determining the normal parameter range corresponding to each temperature parameter value according to the central value, wherein the target temperature measuring point is a temperature measuring point arranged in the target space region;
for any one to-be-compared temperature measurement point in each target temperature measurement point, comparing any one item target temperature parameter value in the temperature parameter values corresponding to the to-be-compared temperature measurement point with the corresponding normal parameter range to obtain a range comparison result corresponding to the target temperature parameter value, wherein the range comparison result comprises a result representing whether the target temperature parameter value exceeds the corresponding normal parameter range and/or a result representing the exceeding degree of the target temperature parameter value exceeding the corresponding normal parameter range;
and determining a temperature information comparison result corresponding to the temperature measurement points to be compared according to the range comparison result corresponding to each temperature parameter value of the temperature measurement points to be compared.
Optionally, after the step of comparing the temperature information corresponding to the temperature measurement points set in each of the target space regions to obtain a temperature information comparison result, the method further includes:
and taking the space area with the abnormal grade larger than the preset grade represented by the corresponding temperature information comparison result in each target space area as an abnormal space area.
Optionally, after the step of comparing the temperature information corresponding to the temperature measuring points set in each of the target space regions to obtain a temperature information comparison result, the method further includes:
and when the normal space regions which do not belong to the abnormal space regions exist in the target space regions according to the temperature information comparison result, obtaining a safety monitoring result which represents that each electric core to be monitored in each normal space region is in a normal state.
Optionally, the temperature information includes a time temperature value measured at the corresponding temperature measuring point at a safety analysis time, and a temperature change rate measured at the corresponding temperature measuring point at least one historical time period before the safety analysis time;
the step of comparing the temperature information corresponding to the temperature measuring points set in each target space region to obtain a temperature information comparison result comprises:
comparing the moment temperature values corresponding to the temperature measuring points arranged in the target space areas to obtain a moment temperature comparison result;
if the situation that a time temperature abnormal area exists in each target space area is determined according to the time temperature comparison result, comparing the temperature change rate corresponding to the temperature measuring point arranged in each target space area to obtain a change rate comparison result, and determining the temperature information comparison result according to the time temperature comparison result and the change rate comparison result;
and if the situation that the time temperature abnormal area does not exist in each target space area is determined according to the time temperature comparison result, determining the temperature information comparison result according to the time temperature comparison result.
Optionally, the monitoring parameter information includes a cell temperature change rate of the to-be-monitored battery cell in a plurality of historical time periods before a safety analysis time, and the step of analyzing the monitoring parameter information of the target battery cell to obtain a safety monitoring result of the target battery cell includes:
comparing the cell temperature change rates of the cells to be monitored in the abnormal space region in the same historical time period, and accumulating the abnormal times of the cell temperature change rates of the target cell in the historical time periods;
and determining the safety monitoring result of the target battery cell according to the abnormal times.
Optionally, the monitoring parameter information includes a battery cell temperature change rate and a fan wind speed change rate of the battery cell to be monitored in a plurality of historical time periods before a safety analysis time, and the step of analyzing the monitoring parameter information of the target battery cell to obtain a safety monitoring result of the target battery cell includes:
accumulating the duration of a positive correlation state between the cell temperature change rate of the target cell and the fan wind speed change rate;
and determining the safety monitoring result of the target battery cell according to the duration.
Optionally, after the step of determining the safety monitoring result of the to-be-monitored battery cell according to the monitoring parameter analysis result corresponding to the to-be-monitored battery cell and the regional temperature analysis result corresponding to the spatial region of the at least one hierarchy where the to-be-monitored battery cell is located, the method further includes:
and when the safety monitoring result representation of the electric core to be monitored needs to perform exception handling on the electric core to be monitored, executing exception handling measures corresponding to the safety monitoring result of the electric core to be monitored, wherein the exception handling measures comprise outputting an early warning prompt and/or cutting off connection.
In order to achieve the above object, the present invention further provides an energy storage system safety monitoring device, which includes:
the system comprises an acquisition module, a detection module and a processing module, wherein the acquisition module is used for acquiring temperature information respectively measured at each temperature measuring point in the running process of an energy storage system and acquiring monitoring parameter information obtained by monitoring each battery cell to be monitored in the running process of the energy storage system, the whole space region where each battery cell to be monitored is located is divided into a hierarchical structure comprising at least one hierarchy, a plurality of space regions divided from each hierarchy in the hierarchical structure are divided into a plurality of subspace regions in the next hierarchy, and one temperature measuring point is arranged in each space region divided from each hierarchy;
the determining module is configured to determine a safety monitoring result of the electrical core to be monitored according to a monitoring parameter analysis result corresponding to the electrical core to be monitored and a region temperature analysis result corresponding to a spatial region of at least one hierarchy where the electrical core to be monitored is located, where the monitoring parameter analysis result is obtained by analyzing the monitoring parameter information of the electrical core to be monitored, and the region temperature analysis result is obtained by analyzing the temperature information of the temperature measuring point set in the spatial region.
In order to achieve the above object, the present invention further provides an energy storage system safety monitoring device, which includes: the energy storage system safety monitoring method comprises a memory, a processor and an energy storage system safety monitoring program which is stored on the memory and can run on the processor, wherein the steps of the energy storage system safety monitoring method are realized when the energy storage system safety monitoring program is executed by the processor.
In addition, to achieve the above object, the present invention further provides a computer readable storage medium, where an energy storage system safety monitoring program is stored, and when the energy storage system safety monitoring program is executed by a processor, the steps of the energy storage system safety monitoring method are implemented.
In the invention, temperature information respectively measured at each temperature measuring point in the running process of an energy storage system is obtained, and monitoring parameter information respectively obtained by monitoring each electric core to be monitored in the running process of the energy storage system is obtained, wherein the whole space region where each electric core to be monitored is located is divided into a hierarchical structure comprising at least one hierarchy, a plurality of space regions divided by each layer in the hierarchical structure are respectively divided into a plurality of subspace regions at the next layer, and each space region divided by each layer is respectively provided with one temperature measuring point; determining a safety monitoring result of the electric core to be monitored according to a monitoring parameter analysis result corresponding to the electric core to be monitored and a region temperature analysis result corresponding to a space region of at least one hierarchy where the electric core to be monitored is located, wherein the monitoring parameter analysis result is obtained by analyzing the monitoring parameter information of the electric core to be monitored, and the region temperature analysis result is obtained by analyzing the temperature information of a temperature measuring point arranged in the space region.
Compared with the method for comparing the individual temperature value of each battery cell with the threshold value, the method provided by the invention considers the incidence relation among the battery cells, divides the whole space area where each battery cell is located into at least one layer of hierarchical structure, respectively sets the temperature measuring points in the space areas of the layers, and analyzes the safety monitoring result of the battery cell by combining the analysis result of the temperature information measured by the temperature measuring points in the space area where the battery cell is located and the analysis result of the monitoring parameter information of the battery cell, thereby enriching the analysis dimension of the safety monitoring of the battery cell, further reducing the false detection condition and improving the accuracy of the safety monitoring of the energy storage system.
Drawings
FIG. 1 is a schematic diagram of a hardware operating environment according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a safety monitoring method for an energy storage system according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of an energy storage container according to an embodiment of the present invention;
FIGS. 4, 5 and 6 are schematic diagrams of two safety monitoring system architectures according to embodiments of the present invention, which are statistical counts of path inclination profiles according to a more regular bridge scheme according to embodiments of the present invention;
fig. 7 is a functional block diagram of a safety monitoring device for an energy storage system according to a preferred embodiment of the 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.
As shown in fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
It should be noted that, in the embodiment of the present invention, the energy storage system safety monitoring device may be a smart phone, a personal computer, a server, or other devices, and is not limited herein.
As shown in fig. 1, the energy storage system safety monitoring device may include: a processor 1001, e.g. a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory such as a disk memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the device configuration shown in fig. 1 does not constitute a limitation of the energy storage system safety monitoring device, and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, the memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and an energy storage system security monitoring program. The operating system is a program for managing and controlling hardware and software resources of the equipment and supports the running of the energy storage system safety monitoring program and other software or programs. In the device shown in fig. 1, the user interface 1003 is mainly used for data communication with a client; the network interface 1004 is mainly used for establishing communication connection with a server; and the processor 1001 may be configured to call the energy storage system safety monitoring program stored in the memory 1005, and perform the following operations:
the method comprises the steps of obtaining temperature information respectively measured at each temperature measuring point in the running process of an energy storage system, and obtaining monitoring parameter information obtained by monitoring each battery cell to be monitored in the running process of the energy storage system, wherein the whole space region where each battery cell to be monitored is located is divided into a hierarchical structure comprising at least one hierarchy, a plurality of space regions divided by each layer in the hierarchical structure are divided into a plurality of subspace regions in the next layer, and one temperature measuring point is arranged in each space region divided by each layer;
and determining a safety monitoring result of the battery core to be monitored according to a monitoring parameter analysis result corresponding to the battery core to be monitored and a region temperature analysis result corresponding to a spatial region of at least one hierarchy where the battery core to be monitored is located, wherein the monitoring parameter analysis result is obtained by analyzing the monitoring parameter information of the battery core to be monitored, and the region temperature analysis result is obtained by analyzing the temperature information of the temperature measuring point set in the spatial region.
Further, the operation of determining the safety monitoring result of the to-be-monitored battery cell according to the monitoring parameter analysis result corresponding to the to-be-monitored battery cell and the area temperature analysis result corresponding to the spatial area of the at least one hierarchy where the to-be-monitored battery cell is located includes:
taking the uppermost layer of the hierarchical structure as a target hierarchy, taking each space region divided from the uppermost layer as a target space region, and comparing the temperature information corresponding to the temperature measuring points arranged in each target space region to obtain a temperature information comparison result;
when abnormal space regions exist in the target space regions according to the temperature information comparison result, if the target hierarchy is the lowest layer in the hierarchical structure, each battery cell to be monitored in the abnormal space regions is used as a target battery cell, and a safety monitoring result of the target battery cell is obtained according to the monitoring parameter information analysis of the target battery cell;
if the target level is not the lowest level in the hierarchical structure, updating the target level to be the next level of the target level, updating the target space region to be each sub-space region divided at the next level of the abnormal space region, and returning to execute the operation of comparing the temperature information corresponding to the temperature measuring point arranged in each target space region to obtain a temperature information comparison result.
Further, the temperature information includes at least one temperature parameter value, and the operation of comparing the temperature information corresponding to the temperature measurement points set in each of the target space regions to obtain a temperature information comparison result includes:
calculating the central value of the temperature parameter values of the same item corresponding to each target temperature measuring point, and determining the normal parameter range corresponding to each temperature parameter value according to the central value, wherein the target temperature measuring point is a temperature measuring point arranged in the target space region;
for any one to-be-compared temperature measurement point in each target temperature measurement point, comparing any one item target temperature parameter value in the temperature parameter values corresponding to the to-be-compared temperature measurement point with the corresponding normal parameter range to obtain a range comparison result corresponding to the target temperature parameter value, wherein the range comparison result comprises a result representing whether the target temperature parameter value exceeds the corresponding normal parameter range and/or a result representing the exceeding degree of the target temperature parameter value exceeding the corresponding normal parameter range;
and determining a temperature information comparison result corresponding to the temperature measurement points to be compared according to the range comparison result corresponding to each temperature parameter value of the temperature measurement points to be compared.
Further, after the operation of comparing the temperature information corresponding to the temperature measurement points set in each of the target space regions to obtain a temperature information comparison result, the processor 1001 may be further configured to invoke an energy storage system safety monitoring program stored in the memory 1005, and execute the following operations:
and taking the space area with the abnormal grade larger than the preset grade represented by the corresponding temperature information comparison result in each target space area as an abnormal space area.
Further, after the operation of comparing the temperature information corresponding to the temperature measuring points set in each of the target space regions to obtain a temperature information comparison result, the processor 1001 may be further configured to invoke an energy storage system safety monitoring program stored in the memory 1005 to perform the following operations:
and when a normal space region which does not belong to the abnormal space region exists in each target space region according to the temperature information comparison result, obtaining a safety monitoring result which represents that each battery cell to be monitored in each normal space region is in a normal state.
Further, the temperature information comprises a time temperature value measured at the corresponding temperature measuring point at the safety analysis time, and a temperature change rate measured at the corresponding temperature measuring point at least one historical time period before the safety analysis time;
the operation of comparing the temperature information corresponding to the temperature measuring points set in each target space region to obtain a temperature information comparison result comprises:
comparing the moment temperature values corresponding to the temperature measuring points arranged in the target space areas to obtain a moment temperature comparison result;
if a moment temperature abnormal area exists in each target space area according to the moment temperature comparison result, comparing the temperature change rate corresponding to the temperature measuring point arranged in each target space area to obtain a change rate comparison result, and determining the temperature information comparison result according to the moment temperature comparison result and the change rate comparison result;
and if the situation that the time temperature abnormal area does not exist in each target space area is determined according to the time temperature comparison result, determining the temperature information comparison result according to the time temperature comparison result.
Further, the monitoring parameter information includes a battery cell temperature change rate of the battery cell to be monitored in a plurality of historical time periods before a safety analysis time, and the operation of analyzing the safety monitoring result of the target battery cell according to the monitoring parameter information of the target battery cell includes:
comparing the cell temperature change rate of each cell to be monitored in the abnormal space region in the same historical time period, and accumulating the abnormal times of the cell temperature change rate of the target cell in each historical time period;
and determining the safety monitoring result of the target battery cell according to the abnormal times.
Further, the monitoring parameter information includes a cell temperature change rate and a fan wind speed change rate of the to-be-monitored cell in a plurality of historical time periods before a safety analysis time, and the operation of analyzing the safety monitoring result of the target cell according to the monitoring parameter information of the target cell includes:
accumulating the duration of a positive correlation state between the cell temperature change rate of the target cell and the fan wind speed change rate;
and determining the safety monitoring result of the target battery cell according to the duration.
Further, after determining the operation of the safety monitoring result of the electrical core to be monitored according to the monitoring parameter analysis result corresponding to the electrical core to be monitored and the area temperature analysis result corresponding to the spatial area of the at least one hierarchy where the electrical core to be monitored is located, the processor 1001 may be further configured to call an energy storage system safety monitoring program stored in the memory 1005, and execute the following operations:
and when the safety monitoring result representation of the electric core to be monitored needs to perform exception handling on the electric core to be monitored, executing exception handling measures corresponding to the safety monitoring result of the electric core to be monitored, wherein the exception handling measures comprise outputting an early warning prompt and/or cutting off connection.
Based on the structure, various embodiments of the energy storage system safety monitoring method are provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a safety monitoring method for an energy storage system according to a first embodiment of the present invention.
While a logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in an order different than that shown or described herein. In this embodiment, an execution main body of the energy storage system safety monitoring method may be a device such as a personal computer, a smart phone, and the like, which is not limited in this embodiment. In this embodiment, the method for monitoring the safety of the energy storage system includes:
step S10, acquiring temperature information respectively measured at each temperature measuring point in the operation process of the energy storage system, and acquiring monitoring parameter information respectively obtained by monitoring each electric core to be monitored in the operation process of the energy storage system, wherein the whole space region where each electric core to be monitored is located is divided into a hierarchical structure comprising at least one hierarchy, a plurality of space regions divided by each layer in the hierarchical structure are respectively divided into a plurality of subspace regions at the next layer, and one temperature measuring point is respectively arranged in each space region divided by each layer;
the temperatures of the battery cells in the energy storage system may have a certain correlation, for example, the temperatures of the battery cells at a short distance may affect each other, and therefore, when the safety state of the battery cell is determined based on the comparison between the individual temperatures of the battery cells and a certain threshold, a situation of erroneous determination may possibly occur.
In this embodiment, to solve the above problem, when the energy storage system is monitored safely, the safety monitoring result of the battery cell is determined by combining the monitoring parameter information of the battery cell and the analysis result of two dimensions of the environmental temperature of the environment where the battery cell is located, so as to improve the accuracy of the safety monitoring of the energy storage system.
And taking the battery cell needing to be monitored in the energy storage system as the battery cell to be monitored. For each cell to be monitored, a monitoring device may be provided for monitoring at least one parameter of the cell to be monitored (hereinafter referred to as a monitoring parameter to distinguish). The monitoring parameters may include directly measured parameter items, such as cell temperature, cell voltage, and cell current, or may include parameter items calculated according to the directly measured parameter items, such as cell power, a rate of change of the cell voltage in a period of time, a rate of change of the cell temperature in a period of time, and the like, which is not limited in this embodiment. In a specific embodiment, the safety state of the battery cell is determined by monitoring the electrical parameter and combining the monitored temperature information of the battery cell based on the monitored electrical parameter information, which is more accurate than the determination of the safety state of the battery cell only by the temperature information of the battery cell. Different monitoring devices can be used for monitoring different monitoring parameters, and the specific implementation manner of the monitoring devices and the setting manner in the energy storage system are not limited in this embodiment.
And in the operation process of the energy storage system, acquiring monitoring parameter information obtained by monitoring each battery cell to be monitored respectively. The monitoring parameter information is specific value information of a monitoring parameter of the battery cell to be monitored, that is, the monitoring parameter information may include at least one monitoring parameter value, for example, when the monitoring parameter includes a temperature, the monitoring parameter information may include a temperature value of the battery cell to be monitored at a certain time.
The method comprises the steps of dividing an overall space region where each battery cell to be monitored is located into a hierarchical structure comprising at least one layer, dividing a plurality of space regions divided from each layer into a plurality of subspace regions at the next layer in the hierarchical structure, and arranging one temperature measuring point in each space region divided from each layer. The number of the hierarchy levels and the number of the sub-space regions divided from the space region in each hierarchy level may be set according to a specific structure of the energy storage system, and is not limited in this embodiment. For example, taking a container-type energy storage system as shown in fig. 3 as an example, the energy storage system includes a plurality of battery clusters (two battery clusters are schematically shown in the figure), each battery cluster includes a plurality of racks, each Rack includes a plurality of packs, and each Pack includes a plurality of battery cells; the overall space region where the container is located can be divided into N subspace regions, that is, a first level includes N space regions (referred to as first level space regions), and for each first level space region, a region occupied by each Pack in the first level space region is taken as one subspace region, so that including several packs in the first level space region means that the first level space region is divided into several second level space regions, which are not divided any more, that is, the hierarchy structure includes two layers in total; and arranging one temperature measuring point in each first-level space region and arranging one temperature measuring point in each second-level space region. In this embodiment, the setting position of the temperature measuring point in the space area is not particularly limited, and may be set in the central area of the space area, for example.
And in the running process of the energy storage system, temperature information measured at each temperature measuring point is also acquired. The temperature information may include at least one temperature parameter value, where the temperature parameter value may be a temperature value measured at a certain time, or may be a temperature change rate measured in a period of time, that is, the temperature value at a certain time and the temperature change rate in a period of time belong to different temperature parameter values.
In a specific embodiment, safety analysis may be performed at intervals (hereinafter, a time when safety analysis starts is referred to as a safety analysis time), that is, monitoring parameter information and temperature information of a temperature measurement point are acquired at intervals, and safety analysis is performed based on the acquired monitoring parameter information and temperature information; the time interval between two adjacent safety analyses can be set according to the real-time performance of safety monitoring in a specific application scene, and when the real-time performance requirement is high, the time interval can be set to be shorter, for example, one analysis is performed every 10 minutes.
It should be noted that the time interval for performing the safety analysis may be different from the time interval for monitoring each monitoring parameter of the battery cell to be monitored and the time interval for acquiring the temperature of the temperature measuring point. For example, the monitoring parameter value of the electric core to be monitored and the temperature value of the temperature measurement point are collected once every one minute, and safety analysis is performed once every 10 minutes, so that the obtained monitoring parameter information may include the monitoring parameter value monitored at the time of safety analysis, or may further include the monitoring parameter value monitored before the time of safety analysis, and the temperature information is also the same.
Step S20, determining a safety monitoring result of the electric core to be monitored according to a monitoring parameter analysis result corresponding to the electric core to be monitored and a region temperature analysis result corresponding to a spatial region of at least one hierarchy where the electric core to be monitored is located, wherein the monitoring parameter analysis result is obtained by analyzing the monitoring parameter information of the electric core to be monitored, and the region temperature analysis result is obtained by analyzing the temperature information of the temperature measuring point set in the spatial region.
The temperature information of the temperature measuring point can be analyzed (the result obtained by the analysis is hereinafter referred to as the analysis result of the monitoring parameter for distinguishing) and the monitoring parameter information of the battery core to be monitored (the result obtained by the analysis is hereinafter referred to as the analysis result of the area temperature for distinguishing). In a specific embodiment, there are many analysis methods for analyzing the monitoring parameter information and the temperature information, and this embodiment is not limited to this, and for example, each parameter value may be compared with a corresponding threshold, and the comparison result may be used as the analysis result.
The safety monitoring result of the battery cell to be monitored can be determined according to the monitoring parameter analysis result corresponding to the battery cell to be monitored and the area temperature analysis result corresponding to the spatial area of the at least one level where the battery cell to be monitored is located. In a specific embodiment, there are many ways to determine the safety monitoring result of the to-be-monitored battery cell according to the monitoring parameter analysis result and the area temperature analysis result, which are not limited in this embodiment, for example, the abnormal level of the to-be-monitored battery cell represented by the monitoring parameter analysis result and the abnormal level of the to-be-monitored battery cell represented by the area temperature analysis result may be superimposed to serve as the comprehensive abnormal level of the to-be-monitored battery cell, and the comprehensive abnormal level is used as the safety monitoring result.
It can be understood that the temperature of the cell to be monitored is transmitted to other cells to be monitored, which are close to the surrounding, so that when the temperature of one cell is higher, it does not necessarily indicate that the cell is abnormal, and the cell may be affected by the surrounding abnormal cells. When the monitoring parameters of the battery cell are abnormal, the possibility that the battery cell is abnormal is high, and when the temperature of the environment where the battery cell is located is also abnormal, the abnormal condition or the serious abnormal condition of the battery cell can be further determined, so that the accuracy of the safety monitoring result obtained by performing safety analysis on the battery cell can be improved by combining the analysis result of the monitoring parameters of the battery cell and the analysis result of the temperature of the environment where the battery cell is located.
The safety monitoring result may specifically be a result representing whether the electric core to be monitored is an abnormal electric core, or may also be a result representing an abnormal degree of the electric core to be monitored. In the specific embodiment, the setting may be performed according to the requirements of a specific application scenario, and is not limited in this embodiment.
Further, in a specific embodiment, after the safety monitoring results of the battery cells to be monitored are obtained, the safety monitoring results of the battery cells to be monitored may be output, for example, output in a form of a report, or corresponding exception handling measures may be executed for an abnormal battery cell, or corresponding exception handling measures may be executed for battery cells of different exception levels. The embodiment is not particularly limited.
Compare in carrying out solitary temperature value and threshold value to each electric core, incidence relation between each electric core has been considered in this embodiment, divide into the hierarchy structure of at least one deck through the whole spatial region that each electric core was located, and set up the temperature measurement point respectively in the spatial region of each layer, combine the analysis result of the temperature information that the temperature measurement point of the spatial region that electric core was located measures and the analysis result of the monitoring parameter information of electric core self to analyze the safety monitoring result of electric core, the analysis dimension of carrying out safety monitoring to electric core has been enriched, and then the condition of false retrieval can be reduced, improve the accuracy to energy storage system safety monitoring.
Further, in an embodiment, the method for analyzing the temperature information of the temperature measurement points may specifically be that the temperature information of the temperature measurement points is compared with the temperature information of the temperature measurement points set in the respective spatial regions of the same hierarchy, and the comparison result is referred to as a temperature information comparison result for showing and distinguishing, and the temperature information comparison result may be used as the region temperature analysis result corresponding to the temperature measurement points. It can be understood that, if a certain temperature parameter condition of the temperature measurement points set in each space region of the same level is consistent when the battery core is in a normal state, when the temperature parameter condition of a certain temperature measurement point is greatly different from that of other temperature measurement points, it can be considered that the battery core in the space region corresponding to the temperature measurement point is possibly abnormal and possibly in an abnormal state; if the temperature parameter conditions of a certain temperature measurement point at different times (or time intervals) are consistent when the battery core is in a normal state, it can be considered that the battery core in the space region corresponding to the temperature measurement point is possibly abnormal when the temperature parameter condition at a certain time is greatly different from that at other times. The purpose of comparing the temperature parameter information of each temperature measuring point is to determine the difference between the temperature parameter information of each temperature measuring point, so as to determine whether abnormal temperature measuring points exist according to the difference. The comparison of the temperature parameter information of each temperature measurement point may specifically include comparing the same temperature parameter value of the same temperature measurement point at different times or different time periods (hereinafter referred to as longitudinal comparison), or may include comparing the same temperature parameter value of different temperature measurement points at the same time or different time periods (hereinafter referred to as transverse comparison). In the following description, various comparison methods are available to achieve the above-mentioned comparison purpose, and the present embodiment is not limited thereto. For example, in an embodiment, for any one of the temperature measurement points to be compared, for one temperature parameter value, it is determined whether at least one of the other temperature measurement points to be compared has a difference value greater than a certain threshold value with respect to the temperature parameter value of the temperature measurement point, and if so, it may be determined that the temperature information comparison result of the temperature measurement point is that the temperature measurement point is in an abnormal state. The form of the temperature information comparison result obtained by the comparison may also be set according to needs, and is not limited in this embodiment, for example, the temperature information comparison result representing whether each temperature measurement point is an abnormal temperature measurement point may be obtained by the comparison. Compared with a mode of comparing the temperature parameter value of a single temperature measuring point with a threshold value to obtain a regional temperature analysis result, the safety state of the battery cell in the temperature measuring point can be determined based on the difference between the temperature parameter conditions of the temperature measuring points reflected by the temperature information by comparing the temperature information of the temperature measuring points arranged in each spatial region of the same level, the condition of false detection can be reduced, and the accuracy of safety monitoring of the energy storage system is improved.
Further, in an embodiment, specifically, analyzing the monitoring parameter information of the to-be-monitored electric core may be to use an electric core in a spatial region in a lowest layer level where the to-be-monitored electric core is located in the layer structure as the to-be-compared electric core, compare the monitoring parameter information of each to-be-compared electric core, distinguish a result obtained by the comparison as a monitoring parameter comparison result, and use the monitoring parameter comparison result as a monitoring parameter analysis result of each to-be-compared electric core. The specific comparison mode and purpose of comparison may refer to the temperature information comparison mode of the temperature measuring point, which is not described herein again.
Further, in an embodiment, after the step S20, the method further includes:
step S30, when the safety monitoring result representation of the electric core to be monitored needs to perform exception handling on the electric core to be monitored, executing exception handling measures corresponding to the safety monitoring result of the electric core to be monitored, wherein the exception handling measures comprise outputting an early warning prompt and/or cutting off connection.
The safety monitoring result of the battery cell to be monitored may indicate that the battery cell to be monitored is normal or abnormal, and an abnormal handling measure corresponding to the safety monitoring result may be set for the safety monitoring result indicating that the battery cell to be monitored is abnormal, for example, the abnormal handling measure may include outputting an early warning prompt message and/or cutting off connection; different safety monitoring results can correspond different exception handling measures, for example when the degree of abnormality that the safety monitoring result expressed electric core is lighter, exception handling measure can be output early warning suggestion to make the staff investigate unusual electric core, if again, when the degree of abnormality that the safety monitoring result expressed electric core was more serious, exception handling measure can be the excision connection, in order to avoid electric core continuation work and lead to the emergence of conflagration.
Further, in a specific embodiment, each to-be-monitored electric core may be numbered, the number may represent a spatial region where the to-be-monitored electric core is located, and the number of the to-be-monitored electric core and the corresponding monitoring parameter information are stored in an associated manner, so that the monitoring parameter information of each to-be-monitored electric core is conveniently distinguished and processed.
Further, based on the first embodiment, a second embodiment of the safety detection method for an energy storage system according to the present invention is provided, and in this embodiment, the step S20 includes:
step S201, taking the uppermost layer of the hierarchical structure as a target hierarchy, taking each space region divided from the uppermost layer as a target space region, and comparing the temperature information corresponding to the temperature measuring points arranged in each target space region to obtain a temperature information comparison result;
in this embodiment, the temperature information may be analyzed by comparing the temperature information of the temperature measuring points, and the efficiency of the safety monitoring may be improved by performing a circular traversal analysis according to the hierarchical structure.
Specifically, the uppermost layer of the hierarchical structure may be set as a target hierarchy, and each of the spatial regions partitioned by the uppermost layer may be set as a target spatial region. And for the temperature measuring points arranged in each target space region, comparing the temperature information corresponding to each temperature measuring point to obtain a temperature information comparison result. For the comparison, reference may be made to the detailed description in the first embodiment, and details are not repeated herein.
Step S202, when it is determined that abnormal space regions exist in the target space regions according to the temperature information comparison result, if the target hierarchy is the lowest layer in the hierarchical structure, each to-be-monitored battery cell in the abnormal space regions is used as a target battery cell, and a safety monitoring result of the target battery cell is obtained according to the monitoring parameter information of the target battery cell through analysis;
after the temperature information comparison results of the temperature measuring points arranged in each target space region are obtained, whether an abnormal space region exists in each target space region can be determined according to the temperature information comparison results. The method for determining the abnormal space region is different according to different specific forms of the temperature information comparison result, and the method may be specifically set according to needs, and is not limited herein. For example, when the temperature information comparison result is a result indicating whether the temperature measurement point is in an abnormal state, the target spatial region corresponding to the temperature measurement point in the abnormal state may be used as the abnormal spatial region. For another example, when the temperature information comparison result is a result representing an abnormality level of the temperature measurement point, a region having an abnormality level exceeding a certain level may be used as the abnormal spatial region.
If the target space area is an abnormal space area, it indicates that the battery cell in the target space area may be abnormal, and may further analyze the subspace area or the battery cell in the target space area to further determine whether the battery cell in the target space area is actually abnormal or further determine the degree of the abnormality; when the target space region is not an abnormal space region, it is indicated that the temperature of the battery cell in the target space region is not abnormal, and at this time, it may be determined that the battery cell in the target space region is in a normal state, or at least that no abnormal early warning or other protection measures are performed on the battery cell in the target space region by the target, so that no subsequent analysis may be performed on the subspace region and the battery cell in the target space region, thereby avoiding the waste of computing resources.
When it is determined that an abnormal spatial region exists in each target spatial region, if the target hierarchy is the lowest layer in the hierarchical structure, it is indicated that no subspace region is divided below each target spatial region, at this time, monitoring parameter information of each to-be-monitored electric core in the abnormal spatial region may be analyzed, and a safety detection result of each to-be-monitored electric core is obtained according to a result (a monitoring parameter analysis result) obtained through the analysis.
In a specific embodiment, the detection parameter information of each to-be-monitored battery cell in the abnormal space region can be compared to obtain a monitoring parameter comparison result, and the safety monitoring result of each to-be-monitored battery cell is determined according to the monitoring parameter comparison result, so that the false detection condition is reduced, and the accuracy of the safety monitoring of the energy storage system is improved.
Step S203, if the target hierarchy is not the lowest hierarchy in the hierarchical structure, update the target hierarchy to the next hierarchy of the target hierarchy, update the target spatial region to each subspace region divided by the abnormal spatial region in the next hierarchy, and return to the step S201 of comparing the temperature information corresponding to each temperature measurement point set in each target spatial region.
If the target level is not the lowest level in the hierarchical structure, the divided subspace regions are still arranged below the target space region, and at the moment, the target level is updated to the next level of the target level, the target space region is updated to each subspace region divided by the abnormal space region in the next layer, and the temperature information of the temperature measuring points in each subspace region is analyzed.
Further, in an embodiment, after the step of comparing the temperature information corresponding to the temperature measuring points set in each of the target space regions in step S201 to obtain a temperature information comparison result, the method further includes:
step S204, when it is determined that a normal space region which does not belong to an abnormal space region exists in each target space region according to the temperature information comparison result, a safety monitoring result which indicates that each to-be-monitored electric core in each normal space region is in a normal state is obtained.
When a normal space region which does not belong to the abnormal space region exists in the target space region according to the temperature information comparison result, it can be determined that each electric core to be monitored in the normal space region is in a normal state, at this moment, the temperature information of each temperature measuring point in the normal space region and the monitoring parameter information of each electric core to be monitored can not be analyzed any more, and a safety monitoring result which can represent each electric core to be monitored to be in a normal state is directly obtained, so that the calculation resource is saved, and the safety monitoring efficiency is improved. The normal spatial region is a spatial region that is not an abnormal spatial region in the target spatial region.
Further, in an embodiment, the step S201 of comparing the temperature information corresponding to the temperature measuring points set in each of the target space regions to obtain a temperature information comparison result includes:
step S2011, comparing the moment temperature values corresponding to the temperature measuring points arranged in the target space areas to obtain a moment temperature comparison result;
the temperature information corresponding to the temperature measurement point may include a temperature value measured at the temperature measurement point at the safety analysis time (hereinafter, referred to as a time temperature value for distinction), and may further include a temperature change rate measured at the temperature measurement point at least one historical period before the safety analysis time. The time temperature value represents the temperature condition of the temperature measuring point at the safety analysis time, namely, whether the temperature measuring point is normal or abnormal at the safety analysis time can be reflected, and the temperature change rate represents the temperature change process of the temperature measuring point before the safety analysis time, namely, the process that the temperature measuring point is changed from the normal state to the abnormal state before the safety analysis time can be reflected. In this embodiment, the state of the temperature measurement point is determined by combining the time temperature value and the temperature change rate, so that not only can the obvious abnormality of the temperature measurement point at the safety analysis time be monitored according to the time temperature value, but also the abnormal condition that the temperature measurement point does not obviously show at the safety analysis time can be found as early as possible according to the temperature change rate, thereby facilitating the safety protection measure to be carried out as early as possible, and avoiding the occurrence of the condition that cannot be compensated due to the delayed discovery of the abnormal condition.
The time temperature values corresponding to the temperature measurement points set in each target space region may be compared to obtain a temperature information comparison result (hereinafter, referred to as a time temperature comparison result for distinction).
Step S2012, if the time temperature abnormal area exists in each target space area is determined according to the time temperature comparison result, comparing the temperature change rates corresponding to the temperature measuring points arranged in each target space area to obtain a change rate comparison result, and determining the temperature information comparison result according to the time temperature comparison result and the change rate comparison result;
and determining whether the time temperature abnormal area exists in each target space area according to the time temperature comparison result. The specific determination manner is not limited in this embodiment. For example, when the time temperature comparison result indicates that an abnormal level is present, if the time temperature comparison result indicates that the abnormal level of the temperature measurement point is greater than a preset level, it may be determined that the target spatial region corresponding to the temperature measurement point is a time temperature abnormal region. Wherein the preset grade can be set according to the requirement. When the time temperature comparison result of the temperature measuring points indicates that the abnormal grade of the temperature measuring points is greater than the preset grade, the temperature of the temperature measuring points shows abnormality in each temperature measuring point in the same level at the safety analysis time, and at the moment, the temperature change rates corresponding to the temperature measuring points can be further analyzed, so that whether the temperature measuring points are really abnormal or not is determined or the abnormal degree of the temperature measuring points is further determined by combining the analysis results of the temperature change rates; when the time temperature comparison result of the temperature measurement point indicates that the abnormal level of the temperature measurement point is less than or equal to the preset level, it indicates that the temperature measurement point does not show abnormality in each temperature measurement point in the same level at the time of safety analysis, and at this time, it can be determined that the temperature measurement point is in a normal state, or at least that no abnormal early warning or other protection measures are typically performed in a target space region corresponding to the temperature measurement point at present, so that no serious consequences are caused, in this case, it is not necessary to determine the first electrical core of the temperature measurement point to perform subsequent grouping and comparative analysis by combining the analysis result of the temperature change rate of the temperature measurement point, and the waste of calculation resources is avoided.
If the time temperature abnormal region exists, the temperature change rates corresponding to the temperature measuring points arranged in each target space region can be further compared, and the obtained result is called a change rate comparison result to be distinguished. In a specific embodiment, the manner of comparing the temperature change rates corresponding to the temperature measurement points set in each target space region may specifically include a transverse comparison manner and/or a longitudinal comparison manner, and the specific embodiments of the transverse comparison manner and the longitudinal comparison manner refer to the related descriptions in the first embodiment, which are not described herein again. When only longitudinal comparison is carried out, the longitudinal comparison can be carried out only on the temperature change rate of the temperature measuring point arranged in the time temperature abnormal area, and the longitudinal comparison can not be carried out on the target space area which does not belong to the time temperature abnormal area, so that the calculation resource is saved.
And determining a temperature information comparison result corresponding to the target space area together according to the moment temperature comparison result and the change rate comparison result of the target space area. For example, when the time temperature comparison result and the change rate comparison result can represent the abnormal level of the target space region, the abnormal levels represented by the two comparison results may be superimposed to obtain a comprehensive abnormal level, and the comprehensive abnormal level is used as the temperature information comparison result corresponding to the target space region.
And step S2013, if the fact that the time temperature abnormal area does not exist in each target space area is determined according to the time temperature comparison result, determining the temperature information comparison result according to the time temperature comparison result.
If the time temperature abnormal area does not exist in each target space area according to the time temperature comparison result, the temperature information comparison result can be directly determined according to the time temperature comparison result of the target space area. For example, when the time temperature comparison result can represent the abnormal level of the target space region, the abnormal level may be directly used as the temperature information comparison result corresponding to the target space region, or the abnormal level may be multiplied by a ratio to be used as the temperature information comparison result.
Further, based on the second embodiment, a third embodiment of the method for monitoring safety of an energy storage system according to the present invention is provided, in this embodiment, the step of comparing the temperature information corresponding to the temperature measurement points set in each of the target space regions in step S201 to obtain a temperature information comparison result includes:
step S2014, calculating central values of the temperature parameter values of the same items corresponding to the target temperature measurement points, and determining normal parameter ranges corresponding to the temperature parameter values according to the central values, wherein the target temperature measurement points are temperature measurement points arranged in the target space region;
in this embodiment, the temperature information comprises at least one temperature parameter value. It is to be explained that the temperature value at a certain moment and the temperature change rate over a period of time belong to different temperature parameter values; when the temperature change rates in different time periods of the same temperature measuring point are compared (longitudinal comparison), the temperature change rates in all the time periods belong to the same temperature parameter value; when the temperature change rates of different temperature measuring points are compared (transverse comparison), the temperature change rates in different time periods belong to temperature parameter values of different items, that is, the temperature change rates of different temperature measuring points in the same time period are compared in the transverse comparison.
The temperature measuring points arranged in the target space region are called target temperature measuring points for distinguishing. And calculating the central value of the temperature parameter value of the same item corresponding to each target temperature measurement point. The method can comprise the conditions of transverse comparison and longitudinal comparison, namely, the central values of the temperature change rates of the same temperature measuring point in different historical periods can be calculated, and the central values of the temperature change rates of different temperature measuring points in the same historical period can also be calculated.
The central value of the plurality of temperature parameter values is a value representing a central level of the plurality of temperature parameter values, and there are various ways to calculate the central value of the plurality of temperature parameter values in the specific embodiment, which is not limited in this embodiment. For example, a K-means clustering algorithm may be used for clustering, and the number of clusters may be set to 1, so as to obtain a cluster center value.
According to the calculated central value of a certain temperature parameter value, a range corresponding to the certain temperature parameter value can be determined, the range is used for representing the normal level of the temperature parameter value of the temperature measuring point arranged in each target space region, and the range is referred to as a normal parameter range for distinguishing. The determining the normal parameter range according to the central value may specifically be to float the central value by a certain value to obtain the normal parameter range, and the floating value may be set according to experience.
In other embodiments, parameter comparison may not be performed for the first time when the energy storage system is started to operate, and in this time, a range formed by a maximum value and a minimum value of temperature parameter values of temperature measurement points set in each spatial region of the same level is used as a normal parameter range corresponding to the temperature parameter value when safety analysis is performed in a subsequent time period.
Step S2015, comparing any one item target temperature parameter value of various temperature parameter values corresponding to the temperature measurement points to be compared with the corresponding normal parameter range to obtain a range comparison result corresponding to the target temperature parameter value, wherein the range comparison result comprises a result representing whether the target temperature parameter value exceeds the corresponding normal parameter range and/or a result representing the exceeding degree of the target temperature parameter value exceeding the corresponding normal parameter range;
any one of the target temperature measurement points is called a temperature measurement point to be compared for distinguishing. Comparing any one temperature parameter value (hereinafter referred to as a target temperature parameter value for distinguishing) of the temperature parameter values corresponding to the temperature points to be compared with the corresponding normal temperature range to obtain a comparison result (hereinafter referred to as a range comparison result for distinguishing). For example, the temperature value of the temperature measuring point to be compared is compared with the normal temperature range to obtain a range comparison result, and the temperature change rate of the temperature measuring point to be compared in a historical time period is compared with the normal temperature change rate range of the historical time period to obtain a range comparison result.
In a specific implementation manner, according to specific needs, the range comparison result may be set to include a result indicating whether the target temperature parameter value exceeds the corresponding normal parameter range, or a result indicating an extent to which the target temperature parameter value exceeds the corresponding normal parameter range, or include a result indicating whether the target temperature parameter value exceeds the corresponding normal parameter range, or include a result indicating an extent to which the target temperature parameter value exceeds the corresponding normal parameter range, which is not limited in this embodiment.
And S2016, determining a temperature information comparison result corresponding to the temperature measurement points to be compared according to the range comparison result corresponding to each temperature parameter value of the temperature measurement points to be compared.
After the range comparison results corresponding to the temperature parameter values of the temperature measurement points to be compared are obtained, the temperature information comparison results of the temperature measurement points to be compared can be determined according to the range comparison results. In an embodiment, the temperature information comparison result may be a result indicating whether the temperature measurement point is abnormal, and at this time, when it is determined according to the range comparison result that at least one temperature parameter value of the temperature measurement point exceeds the corresponding normal parameter range, it may be determined that the temperature measurement point is abnormal, otherwise, it is determined that the temperature measurement point is not abnormal.
In another embodiment, the temperature information comparison result may be an abnormal level of the temperature measurement point, that is, the abnormal level of the temperature measurement point may be determined according to the range comparison result corresponding to each temperature parameter value of the temperature measurement point. In a specific embodiment, a manner of determining the abnormal level of the temperature measuring point according to the range comparison result may be set as needed, and is not limited in this embodiment. It can be understood that when the temperature measuring point does not exceed the temperature parameter value corresponding to the normal parameter range, the abnormal level is generally the lowest level; when the number of temperature parameter values of the temperature measuring points exceeding the corresponding normal parameter range is more, the abnormal grade of the temperature measuring points is generally higher; when the temperature parameter value of the temperature measuring point exceeds the corresponding normal parameter range to a greater extent, the abnormal level of the temperature parameter value is generally higher.
Further, in an embodiment, after the step of comparing the temperature information corresponding to the temperature measuring points set in each of the target space regions in step S201 to obtain a temperature information comparison result, the method further includes:
step S205 is to use a space area, of which the abnormal level represented by the temperature information comparison result corresponding to each of the target space areas is greater than a preset level, as an abnormal space area.
When the temperature information comparison result is a comparison result representing the abnormal grade of the temperature measuring point, if the abnormal grade represented by the temperature information comparison result of the temperature measuring point in a certain target space area is greater than a preset grade, the target space area can be used as an abnormal space area.
Further, based on the second and/or third embodiment, a third embodiment of the method for detecting safety of an energy storage system according to the present invention is provided, in this embodiment, the step of analyzing, according to the monitoring parameter information of the target electric core, to obtain a safety monitoring result of the target electric core in step S202 includes:
step S2021, comparing the cell temperature change rates of the to-be-monitored cells in the abnormal space region in the same historical time period, and accumulating the abnormal times of the cell temperature change rates of the target cell in the historical time periods;
in this embodiment, a specific implementation manner is provided for obtaining a safety monitoring result of a target electrical core according to monitoring parameter information analysis of the target electrical core.
Specifically, the monitoring parameter information of the battery cell to be monitored may include a battery cell temperature change rate of the battery cell to be monitored in a plurality of historical time periods before the safety analysis time. The cell temperature change rates of the cells to be monitored in the abnormal space region in the same history period can be compared, the comparison results corresponding to the target cell in the history periods can be obtained, the comparison results can reflect whether the cell temperature change rates of the target cell in the corresponding history periods are abnormal or not, and the abnormal times (hereinafter referred to as abnormal times) of the target cell can be accumulated according to the comparison results. The manner of comparing the battery core temperature change rates of the battery cores to be monitored to obtain the comparison result is not limited in this embodiment, and for example, the comparison manner of the temperature parameter values of the temperature measured in the above embodiment may be referred to.
Step S2022, determining a safety monitoring result of the target electrical core according to the abnormal times.
The safety monitoring result of the target battery cell can be determined according to the abnormal times of the target battery cell. In a specific embodiment, the safety monitoring result of the target battery cell may be determined only according to the abnormal times of the target battery cell, or may also be determined by combining with other analysis results. In this embodiment, a manner of determining the safety monitoring result of the target electric core according to the abnormal number is not limited. It can be understood that the more abnormal times of the target cell indicates a higher possibility of abnormality or a higher degree of abnormality.
Further, in an embodiment, the step of analyzing, according to the monitoring parameter information of the target battery cell, to obtain a safety monitoring result of the target battery cell in step S202 includes:
step S2023, accumulating a duration that the cell temperature change rate of the target cell and the fan wind speed change rate are in a positive correlation state;
in this embodiment, a specific embodiment of analyzing the monitoring parameter information of the target cell to obtain a safety monitoring result of the target cell is provided.
Specifically, the monitoring parameter information of the battery cell to be monitored may include a battery cell temperature change rate and a fan wind speed change rate of the battery cell to be monitored in a plurality of historical time periods before the safety analysis time. The cell temperature change rate and the fan wind speed change rate of the target cell in the same time period can be compared to determine whether the cell temperature change rate and the fan wind speed change rate are in positive correlation in the same time period. If the fan wind speed change rate is positive under the condition that the cell temperature change rate is positive in a period of time, determining that the cell temperature change rate is in positive correlation with the fan wind speed change rate, and at the moment, indicating that the cell temperature is increased under the condition that the fan wind speed is increased, indicating that the temperature is increased in a non-regular way due to the abnormal condition in the cell.
The duration that the cell temperature change rate of the target cell and the fan wind speed change rate are in a positive correlation state can be accumulated.
Step S2024, determining a safety monitoring result of the target electric core according to the duration.
The safety monitoring result of the target battery cell can be determined according to the duration of the target battery cell. In a specific embodiment, the safety monitoring result of the target battery cell may be determined only according to the duration of the target battery cell, or may also be determined by combining with other analysis results, for example, determining the safety monitoring result of the target battery cell by combining with the abnormal times of the target battery cell in the foregoing embodiment. In this embodiment, the manner of determining the safety monitoring result of the target battery cell according to the duration is not limited. It is understood that a longer duration of the target cell indicates a greater possibility of abnormality or a greater degree of abnormality.
In an embodiment, the number of times that the cell temperature value of the target cell at each historical time exceeds the threshold may be further accumulated, and the safety monitoring result of the target cell may be determined according to the number of times that the cell temperature value exceeds the threshold. It is understood that the greater the number of times the above threshold is exceeded, the greater the likelihood of an abnormality or the greater the degree of abnormality.
Further, in an embodiment, when the number of times of abnormality of the target battery cell exceeds a certain number of times, the target battery cell may be warned. And when the duration that the temperature change rate of the target battery cell and the fan wind speed change rate are in a positive correlation state reaches a preset duration, early warning is carried out on the target battery cell. And when the number of times of exceeding the threshold value of the target battery cell reaches a certain number of times, early warning is carried out on the target battery cell. If the three situations of the target battery cell occur, the target battery cell can be cut off and protected so as to be convenient to overhaul. If the target electric core has any two conditions, the target electric core can be cut off and suspended for a period of time, and then the target electric core can work.
Further, in an embodiment, the acquisition, analysis, calculation and processing of the monitoring parameter information may be implemented by a centralized control board in an energy storage system (or called a container), and the system architecture of the centralized control board integrates the information acquisition, the information analysis, calculation and system control into one centralized control board for processing. In another embodiment, as shown in fig. 4, the processing may be performed on the basis of a plurality of distributed independent control panels, and the processing results of the independent control panels may be collectively analyzed to perform system control. In another embodiment, as shown in fig. 5 and fig. 6, the information in the energy storage system may also be collected and sent to a remote cloud server for analysis and computation (the computing power of the cloud server is strong), and the result is sent to each energy storage system for control after the analysis and processing.
In addition, an embodiment of the present invention further provides an energy storage system safety monitoring device, and referring to fig. 7, the energy storage system safety monitoring device includes:
the acquisition module 10 is configured to acquire temperature information respectively measured at each temperature measuring point in an operation process of the energy storage system, and acquire monitoring parameter information obtained by monitoring each to-be-monitored battery cell in the operation process of the energy storage system, where an overall spatial region where each to-be-monitored battery cell is located is divided into a hierarchical structure including at least one hierarchy level, a plurality of spatial regions divided in each hierarchy level are divided into a plurality of subspace regions in a next hierarchy level, and one temperature measuring point is arranged in each spatial region divided in each hierarchy level;
the determining module 20 is configured to determine a safety monitoring result of the electrical core to be monitored according to a monitoring parameter analysis result corresponding to the electrical core to be monitored and a region temperature analysis result corresponding to a spatial region of at least one hierarchy where the electrical core to be monitored is located, where the monitoring parameter analysis result is obtained by analyzing the monitoring parameter information of the electrical core to be monitored, and the region temperature analysis result is obtained by analyzing the temperature information of the temperature measuring point set in the spatial region.
Further, the determining module 20 is further configured to:
taking the uppermost layer of the hierarchical structure as a target hierarchy, taking each space region divided from the uppermost layer as a target space region, and comparing the temperature information corresponding to the temperature measuring points arranged in each target space region to obtain a temperature information comparison result;
when abnormal space areas exist in the target space areas according to the temperature information comparison results, if the target hierarchy is the lowest layer in the hierarchical structure, each to-be-monitored battery cell in the abnormal space areas is used as a target battery cell, and safety monitoring results of the target battery cells are obtained according to the monitoring parameter information analysis of the target battery cells;
if the target level is not the lowest level in the hierarchical structure, updating the target level to be the next level of the target level, updating the target space region to be each sub-space region divided at the next level of the abnormal space region, and returning to execute the operation of comparing the temperature information corresponding to the temperature measuring point arranged in each target space region to obtain a temperature information comparison result.
Further, the temperature information comprises at least one temperature parameter value, and the determining module 20 is further configured to:
calculating the central value of the temperature parameter values of the same item corresponding to each target temperature measuring point, and determining the normal parameter range corresponding to each temperature parameter value according to the central value, wherein the target temperature measuring point is a temperature measuring point arranged in the target space region;
for any one to-be-compared temperature measurement point in each target temperature measurement point, comparing any one item target temperature parameter value in the temperature parameter values corresponding to the to-be-compared temperature measurement point with the corresponding normal parameter range to obtain a range comparison result corresponding to the target temperature parameter value, wherein the range comparison result comprises a result representing whether the target temperature parameter value exceeds the corresponding normal parameter range and/or a result representing the exceeding degree of the target temperature parameter value exceeding the corresponding normal parameter range;
and determining a temperature information comparison result corresponding to the temperature measurement points to be compared according to the range comparison result corresponding to each temperature parameter value of the temperature measurement points to be compared.
Further, the determining module 20 is further configured to:
and taking the space area with the abnormal grade larger than the preset grade represented by the corresponding temperature information comparison result in each target space area as an abnormal space area.
Further, the determining module 20 is further configured to:
and when a normal space region which does not belong to the abnormal space region exists in each target space region according to the temperature information comparison result, obtaining a safety monitoring result which represents that each battery cell to be monitored in each normal space region is in a normal state.
Further, the temperature information comprises a time temperature value measured at the corresponding temperature measuring point at the safety analysis time, and a temperature change rate measured at the corresponding temperature measuring point at least one historical time period before the safety analysis time;
the determination module 20 is further configured to
Comparing the moment temperature values corresponding to the temperature measurement points arranged in the target space areas to obtain a moment temperature comparison result;
if the situation that a time temperature abnormal area exists in each target space area is determined according to the time temperature comparison result, comparing the temperature change rate corresponding to the temperature measuring point arranged in each target space area to obtain a change rate comparison result, and determining the temperature information comparison result according to the time temperature comparison result and the change rate comparison result;
and if the situation that the time temperature abnormal area does not exist in each target space area is determined according to the time temperature comparison result, determining the temperature information comparison result according to the time temperature comparison result.
Further, the monitoring parameter information includes a cell temperature change rate of the to-be-monitored cell in a plurality of historical time periods before the safety analysis time, and the determining module 20 is further configured to:
comparing the cell temperature change rate of each cell to be monitored in the abnormal space region in the same historical time period, and accumulating the abnormal times of the cell temperature change rate of the target cell in each historical time period;
and determining the safety monitoring result of the target battery cell according to the abnormal times.
Further, the monitoring parameter information includes a cell temperature change rate and a fan wind speed change rate of the to-be-monitored cell in a plurality of historical time periods before the safety analysis time, and the determining module 20 is further configured to:
accumulating the duration of a positive correlation state between the cell temperature change rate of the target cell and the fan wind speed change rate;
and determining the safety monitoring result of the target battery cell according to the duration.
Further, the apparatus further comprises:
and the execution module is used for executing an exception handling measure corresponding to the safety monitoring result of the electric core to be monitored when the safety monitoring result representation of the electric core to be monitored needs to carry out exception handling on the electric core to be monitored, wherein the exception handling measure comprises outputting an early warning prompt and/or cutting off connection.
The expansion content of the specific embodiment of the energy storage system safety monitoring device of the invention is basically the same as that of each embodiment of the energy storage system safety monitoring method, and is not described herein again.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, where an energy storage system safety monitoring program is stored on the storage medium, and when the energy storage system safety monitoring program is executed by a processor, the steps of the energy storage system safety monitoring method are implemented as follows.
The embodiments of the energy storage system safety monitoring device and the computer-readable storage medium of the present invention can refer to the embodiments of the energy storage system safety monitoring method of the present invention, and are 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 apparatus 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 apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises 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, it is clear to those skilled in the art that the above embodiment method can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as 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 (12)

1. The energy storage system safety monitoring method is characterized by comprising the following steps of:
the method comprises the steps of obtaining temperature information respectively measured at each temperature measuring point in the running process of an energy storage system, and obtaining monitoring parameter information obtained by monitoring each battery cell to be monitored in the running process of the energy storage system, wherein the whole space region where each battery cell to be monitored is located is divided into a hierarchical structure comprising at least one hierarchy, a plurality of space regions divided from each layer in the hierarchical structure are divided into a plurality of subspace regions in the next layer, and one temperature measuring point is arranged in each space region divided from each layer;
and determining a safety monitoring result of the electric core to be monitored according to a monitoring parameter analysis result corresponding to the electric core to be monitored and a region temperature analysis result corresponding to a space region of at least one hierarchy where the electric core to be monitored is located, wherein the monitoring parameter analysis result is obtained by analyzing the monitoring parameter information of the electric core to be monitored, and the region temperature analysis result is obtained by analyzing the temperature information of the temperature measuring point arranged in the space region.
2. The energy storage system safety monitoring method according to claim 1, wherein the step of determining the safety monitoring result of the to-be-monitored battery cell according to the monitoring parameter analysis result corresponding to the to-be-monitored battery cell and the area temperature analysis result corresponding to the spatial area of the at least one hierarchy where the to-be-monitored battery cell is located includes:
taking the uppermost layer of the hierarchical structure as a target hierarchy, taking each space region divided from the uppermost layer as a target space region, and comparing the temperature information corresponding to the temperature measuring points arranged in each target space region to obtain a temperature information comparison result;
when abnormal space regions exist in the target space regions according to the temperature information comparison result, if the target hierarchy is the lowest layer in the hierarchical structure, each battery cell to be monitored in the abnormal space regions is used as a target battery cell, and a safety monitoring result of the target battery cell is obtained according to the monitoring parameter information analysis of the target battery cell;
if the target level is not the lowest level in the hierarchical structure, updating the target level to be the next level of the target level, updating the target space area to be each subspace area divided by the abnormal space area at the next layer, and returning to the step of performing the step of comparing the temperature information corresponding to the temperature measuring point arranged in each target space area to obtain a temperature information comparison result.
3. The energy storage system safety monitoring method according to claim 2, wherein the temperature information includes at least one temperature parameter value, and the step of comparing the temperature information corresponding to the temperature measurement points set in each of the target space regions to obtain a temperature information comparison result includes:
calculating the central value of the temperature parameter values of the same item corresponding to each target temperature measuring point, and determining the normal parameter range corresponding to each temperature parameter value according to the central value, wherein the target temperature measuring point is a temperature measuring point arranged in the target space region;
for any one to-be-compared temperature measurement point in each target temperature measurement point, comparing any one item target temperature parameter value in the temperature parameter values corresponding to the to-be-compared temperature measurement point with the corresponding normal parameter range to obtain a range comparison result corresponding to the target temperature parameter value, wherein the range comparison result comprises a result representing whether the target temperature parameter value exceeds the corresponding normal parameter range and/or a result representing the exceeding degree of the target temperature parameter value exceeding the corresponding normal parameter range;
and determining a temperature information comparison result corresponding to the temperature measurement points to be compared according to the range comparison result corresponding to each temperature parameter value of the temperature measurement points to be compared.
4. The energy storage system safety monitoring method according to claim 3, wherein after the step of comparing the temperature information corresponding to the temperature measurement points set in each of the target space regions to obtain a temperature information comparison result, the method further comprises:
and taking the space area with the abnormal grade larger than the preset grade represented by the corresponding temperature information comparison result in each target space area as an abnormal space area.
5. The energy storage system safety monitoring method according to claim 2, wherein after the step of comparing the temperature information corresponding to the temperature measurement points set in each of the target space regions to obtain a temperature information comparison result, the method further comprises:
and when a normal space region which does not belong to the abnormal space region exists in each target space region according to the temperature information comparison result, obtaining a safety monitoring result which represents that each battery cell to be monitored in each normal space region is in a normal state.
6. The energy storage system safety monitoring method according to claim 2, wherein the temperature information includes a time temperature value measured at the corresponding temperature measurement point at a safety analysis time, and a temperature change rate measured at the corresponding temperature measurement point at least one historical period before the safety analysis time;
the step of comparing the temperature information corresponding to the temperature measuring points set in each target space region to obtain a temperature information comparison result comprises:
comparing the moment temperature values corresponding to the temperature measuring points arranged in the target space areas to obtain a moment temperature comparison result;
if the situation that a time temperature abnormal area exists in each target space area is determined according to the time temperature comparison result, comparing the temperature change rate corresponding to the temperature measuring point arranged in each target space area to obtain a change rate comparison result, and determining the temperature information comparison result according to the time temperature comparison result and the change rate comparison result;
and if the situation that the time temperature abnormal area does not exist in each target space area is determined according to the time temperature comparison result, determining the temperature information comparison result according to the time temperature comparison result.
7. The energy storage system safety monitoring method of claim 2, wherein the monitoring parameter information includes a cell temperature change rate of the battery cell to be monitored in a plurality of historical time periods before a safety analysis time, and the step of analyzing the monitoring parameter information of the target battery cell to obtain the safety monitoring result of the target battery cell includes:
comparing the cell temperature change rate of each cell to be monitored in the abnormal space region in the same historical time period, and accumulating the abnormal times of the cell temperature change rate of the target cell in each historical time period;
and determining the safety monitoring result of the target battery cell according to the abnormal times.
8. The energy storage system safety monitoring method of claim 2, wherein the monitoring parameter information includes a cell temperature change rate and a fan wind speed change rate of the cell to be monitored in a plurality of historical time periods before a safety analysis time, and the step of analyzing the monitoring parameter information of the target cell to obtain the safety monitoring result of the target cell includes:
accumulating the duration of a positive correlation state between the cell temperature change rate of the target cell and the fan wind speed change rate;
and determining the safety monitoring result of the target battery cell according to the duration.
9. The safety monitoring method for the energy storage system according to any one of claims 1 to 8, wherein after the step of determining the safety monitoring result of the cell to be monitored according to the monitoring parameter analysis result corresponding to the cell to be monitored and the area temperature analysis result corresponding to the spatial area of the at least one hierarchy in which the cell to be monitored is located, the method further includes:
and when the safety monitoring result representation of the electric core to be monitored needs to perform exception handling on the electric core to be monitored, executing exception handling measures corresponding to the safety monitoring result of the electric core to be monitored, wherein the exception handling measures comprise outputting an early warning prompt and/or cutting off connection.
10. An energy storage system safety monitoring device, characterized in that, energy storage system safety monitoring device includes:
the system comprises an acquisition module, a monitoring module and a control module, wherein the acquisition module is used for acquiring temperature information respectively measured at each temperature measuring point in the running process of an energy storage system and acquiring monitoring parameter information obtained by monitoring each to-be-monitored electric core in the running process of the energy storage system, the whole space region where each to-be-monitored electric core is located is divided into a hierarchical structure comprising at least one hierarchy, a plurality of space regions divided by each layer in the hierarchical structure are divided into a plurality of subspace regions in the next layer, and one temperature measuring point is arranged in each space region divided by each layer;
the determining module is configured to determine a safety monitoring result of the electrical core to be monitored according to a monitoring parameter analysis result corresponding to the electrical core to be monitored and a region temperature analysis result corresponding to a spatial region of at least one hierarchy where the electrical core to be monitored is located, where the monitoring parameter analysis result is obtained by analyzing the monitoring parameter information of the electrical core to be monitored, and the region temperature analysis result is obtained by analyzing the temperature information of the temperature measuring point set in the spatial region.
11. An energy storage system safety monitoring device, comprising: a memory, a processor and an energy storage system safety monitoring program stored on the memory and executable on the processor, the energy storage system safety monitoring program when executed by the processor implementing the steps of the energy storage system safety monitoring method as claimed in any one of claims 1 to 9.
12. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon an energy storage system safety monitoring program, which when executed by a processor implements the steps of the energy storage system safety monitoring method according to any one of claims 1 to 9.
CN202211273803.5A 2022-10-18 2022-10-18 Energy storage system safety monitoring method, device, equipment and storage medium Pending CN115580018A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117312762A (en) * 2023-11-27 2023-12-29 宁德时代新能源科技股份有限公司 Management system of energy storage system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117312762A (en) * 2023-11-27 2023-12-29 宁德时代新能源科技股份有限公司 Management system of energy storage system

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