Energy storage system and maintenance method therefor

Abstract

The present application relates to an energy storage system and a maintenance method therefor. The method comprises: by means of a battery management system (BMS), receiving a charge / discharge instruction which is transmitted by a power conversion system (PCS) and indicates a target SOC value; and on the basis of the charge / discharge instruction, controlling a target battery module to perform charging / discharging, and when the target battery module reaches the target SOC value during charging / discharging, feeding back SOC matching completion information to a cloud server by means of the PCS, so as to instruct a cloud server to determine whether to execute battery supplementing or battery swapping. By means of the method, on the basis of a received charge / discharge instruction, a target battery module can be controlled to perform charging / discharging, such that an SOC of a new battery module and an SOC of a used battery module are adjusted to be the same, thereby avoiding the problem of the actual capacity of the energy storage system being reduced due to the difference between the SOC of the new battery module and the SOC of the used battery module.

Description

Energy storage system and maintenance method thereof

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 30, 2023, with application number 202311662265.3 and invention name “Energy Storage System and Maintenance Method Thereof”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of energy storage technology, and in particular to an energy storage system and a maintenance method thereof. Background Art

[0003] Existing energy storage systems lack equipment for discharging battery pack (PACK)-level modules. During maintenance, replacement, or additions, the SOC (State-of-Charge) of the old and new battery modules may be inconsistent. If the new battery modules are directly added to the existing energy storage system, the SOC of the battery cells will deviate significantly. Due to the "barrel effect," the actual capacity of the battery cannot be fully utilized, resulting in a reduction in the actual capacity of the energy storage system.

[0004] Summary of the Invention

[0005] Based on this, it is necessary to provide an energy storage system and a maintenance method thereof that can adjust the SOC of new and old battery modules to be consistent in order to address the above technical problems.

[0006] In a first aspect, the present application provides a maintenance method for an energy storage system, which is applied to a battery management system (BMS) in the energy storage system. The method includes:

[0007] Receiving a charge and discharge instruction indicating a target SOC value transmitted by the energy storage converter PCS; wherein the target SOC value is generated by the cloud server processing battery supplementation information or battery replacement information and sent to the energy storage converter PCS;

[0008] The target battery module is controlled to charge and discharge based on the charge and discharge instructions. When the target battery module is charged and discharged to the target SOC value, the SOC matching completion information is fed back to the cloud server through the energy storage converter PCS; the SOC matching completion information is used to instruct the cloud server to determine whether to perform battery supplementation or battery replacement.

[0009] In one embodiment, the method further comprises:

[0010] Determine the charge and discharge completion time required for the target battery module to charge and discharge to the target SOC value;

[0011] The charge and discharge completion time is fed back to the energy storage converter PCS.

[0012] In one embodiment, determining the charge and discharge completion time required for the target battery module to be charged and discharged to a target SOC value includes:

[0013] Obtain the initial SOC value and rated capacity of the target battery module;

[0014] The charge and discharge completion time is obtained based on the initial SOC value, rated capacity and target SOC value.

[0015] In one embodiment, the charge and discharge instruction is used to indicate that battery replenishment is required; the charge and discharge instruction carries a charge and discharge start time determined based on the charging cost;

[0016] The method also includes:

[0017] According to the preset interval, the remaining time for charge and discharge startup is sent to the energy storage converter PCS; the remaining time for charge and discharge startup is the remaining time from the current time to the charge and discharge startup time.

[0018] In one embodiment, the method further comprises:

[0019] If it is detected that the target battery module cannot be charged or discharged to the target SOC value, the supplementary task failure information will be transmitted to the cloud server through the energy storage converter PCS.

[0020] In one embodiment, the method further comprises:

[0021] Detecting whether the number of battery modules in the energy storage system increases within a preset time period;

[0022] If yes, the supplementary task completion information is transmitted to the cloud server via the energy storage converter PCS;

[0023] If not, the supplementary task failure information is transmitted to the cloud server through the energy storage converter PCS.

[0024] In one embodiment, the charge and discharge instruction is used to instruct execution of battery replacement; the target battery module is a battery module to be replaced in the energy storage system;

[0025] Control the target battery module to charge and discharge based on the charge and discharge instructions, including:

[0026] Discharge the target battery module to a fully discharged state;

[0027] When it is detected that the target battery module is in a fully discharged state, the target battery module is charged to a target SOC value.

[0028] In one embodiment, the method further comprises:

[0029] If it is detected that the target battery module cannot be charged or discharged to the target SOC value, the maintenance task failure information will be transmitted to the cloud server through the energy storage converter PCS.

[0030] In a second aspect, the present application further provides a maintenance method for an energy storage system, which is applied to a cloud server in the energy storage system, and the method includes:

[0031] Processing battery addition or replacement information, generating and sending a target SOC value; the target SOC value is used to instruct the PCS to transmit charge and discharge instructions to the BMS; the charge and discharge instructions are used to instruct the BMS to control the target battery module to charge and discharge, and when the target battery module is charged and discharged to the target SOC value, the PCS is used to feedback SOC matching completion information;

[0032] Receive SOC matching completion information and determine whether to perform battery supplementation or battery replacement.

[0033] In one embodiment, the charge and discharge instructions are used to indicate that battery replenishment is required;

[0034] The target SOC value is the remaining SOC value of the battery module to be added to the energy storage system.

[0035] In one embodiment, the battery supplementary information is a module code of a battery module to be added to the energy storage system;

[0036] Processing battery supplementary information to generate target SOC value, including:

[0037] The target SOC value is determined based on the time interval between the production time and the current time carried in the module code.

[0038] In one embodiment, the charge and discharge instruction is used to instruct execution of battery replacement; the target battery module is a battery module to be replaced in the energy storage system;

[0039] The target SOC value is the SOC value of the battery module in the energy storage system that is in a fault state.

[0040] In a third aspect, the present application further provides a maintenance device for an energy storage system, which is applied to a battery management system (BMS) in the energy storage system. The device includes:

[0041] An instruction receiving module is used to receive a charge and discharge instruction indicating a target SOC value transmitted by the energy storage converter PCS; wherein the target SOC value is generated by the cloud server processing battery supplementation information or battery replacement information and sent to the energy storage converter PCS;

[0042] The information feedback module is used to control the charging and discharging of the target battery module based on the charging and discharging instructions. When the target battery module is charged and discharged to the target SOC value, the SOC matching completion information is fed back to the cloud server through the energy storage converter PCS; the SOC matching completion information is used to instruct the cloud server to determine whether to perform battery supplementation or battery replacement.

[0043] In a fourth aspect, the present application further provides a maintenance device for an energy storage system, which is applied to a cloud server in the energy storage system, and the device includes:

[0044] A generation and transmission module is used to process battery supplementation information or battery replacement information, generate and send a target SOC value; the target SOC value is used to instruct the energy storage converter PCS to transmit charge and discharge instructions to the battery management system BMS; the charge and discharge instructions are used to instruct the battery management system BMS to control the target battery module to charge and discharge, and when the target battery module is charged and discharged to the target SOC value, the energy storage converter PCS is used to feedback SOC matching completion information;

[0045] The information receiving module is used to receive the SOC matching completion information and determine whether to perform battery supplementation or battery replacement.

[0046] In a fifth aspect, the present application further provides an energy storage system, comprising:

[0047] Energy storage converter PCS;

[0048] A battery management system BMS connected to the energy storage converter PCS, the battery management system BMS is used to implement the steps of the above method;

[0049] The cloud server connected to the energy storage converter PCS is used to implement the steps of the above method.

[0050] In a sixth aspect, the present application also provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0051] The above-mentioned energy storage system and maintenance method thereof receive the charge and discharge instructions indicating the target SOC value transmitted by the energy storage converter PCS through the battery management system BMS, and control the target battery module to charge and discharge based on the charge and discharge instructions. When the target battery module is charged and discharged to the target SOC value, the SOC matching completion information is fed back to the cloud server through the energy storage converter PCS to instruct the cloud server to determine whether to perform battery supplementation or battery replacement. The present application adjusts the SOC of the new and old battery modules to be consistent by controlling the charge and discharge of the target battery module based on the received charge and discharge instructions, thereby avoiding the problem of reduced actual capacity of the energy storage system due to the difference in SOC between the new and old battery modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0053] FIG1 is a diagram illustrating an application environment of a maintenance method for an energy storage system according to an embodiment;

[0054] FIG2 is a schematic flow chart of a method for maintaining an energy storage system according to one embodiment;

[0055] FIG3 is a schematic flow chart of a method for maintaining an energy storage system according to another embodiment;

[0056] FIG4 is a schematic diagram of a table for determining a target SOC value in one embodiment;

[0057] FIG5 is a flow chart of a method for maintaining an energy storage system in which charge and discharge instructions are used to indicate the need for battery replenishment in one embodiment;

[0058] FIG6 is a flow chart of a method for maintaining an energy storage system in which a charge and discharge instruction is used to indicate that a battery replacement is required, according to an embodiment;

[0059] FIG7 is a block diagram of a maintenance device for an energy storage system according to one embodiment;

[0060] FIG8 is a structural block diagram of a maintenance device for an energy storage system according to another embodiment;

[0061] FIG9 is a diagram showing the internal structure of an electronic device in one embodiment. DETAILED DESCRIPTION

[0062] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0064] When used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0065] The maintenance, replacement, or addition of battery modules in current mainstream energy storage systems presents, but is not limited to, the following issues: When old and new battery modules are mixed, the energy storage system cannot accurately obtain the SOC value of the new battery module. Direct replacement or addition will result in inaccurate SOC (State of Charge) of the energy storage system, reducing the actual capacity of the energy storage system. The process of adding and replacing battery modules is relatively complicated and labor costs are high: the installer needs to issue charge and discharge instructions on site and must wait and monitor whether the battery SOC reaches the target value before adding the module. The entire process is quite lengthy.

[0066] The energy storage system maintenance method provided in the embodiment of the present application can be applied in the application environment shown in Figure 1. In this case, the terminal 102 communicates with the cloud server 104 via a network. The data storage system can store data that the cloud server 104 needs to process. The data storage system can be integrated on the cloud server 104, or placed on the cloud or other network servers. The cloud server 104 is connected to the energy storage converter PCS (Power Conversion System) 106, and the energy storage converter PCS106 is connected to the battery management system BMS108; the cloud server 104 can process battery replenishment information or battery replacement information to generate a target SOC value and send it to the energy storage converter PCS106. The energy storage converter PCS106 outputs charging and discharging instructions indicating the target SOC value to the battery management system BMS (Battery Management System) 108. The battery management system BMS108 controls the target battery module to charge and discharge based on the charging and discharging instructions. When the target battery module is charged and discharged to the target SOC value, the SOC matching completion information is fed back to the cloud server 104 through the energy storage converter PCS106; wherein, the terminal 102 can be, but is not limited to, various personal computers, laptops, smart phones, tablet computers and portable wearable devices. The portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The server 104 may be implemented as an independent server or a server cluster consisting of multiple servers.

[0067] It should be noted that the terminal 102 can process the battery supplementation information or battery replacement information through the cloud server 104 to generate a target SOC value, and send it to the energy storage converter PCS106 through the cloud server 104.

[0068] In an exemplary embodiment, as shown in FIG2 , a maintenance method for an energy storage system is provided. The method is described by taking the battery management system BMS in FIG1 as an example. The method includes:

[0069] S202, receiving a charge and discharge instruction indicating a target SOC value transmitted by the energy storage converter PCS; wherein the target SOC value is generated by the cloud server processing battery supplementation information or battery replacement information and sent to the energy storage converter PCS.

[0070] Among them, battery supplement information and battery replacement information can be determined according to actual conditions and are not limited in the embodiments of this application.

[0071] Specifically, the battery management system BMS can receive charging and discharging instructions transmitted by the energy storage inverter PCS. It should be noted that the charging and discharging instructions can be sent from the cloud server to the energy storage inverter PCS, or from the terminal device to the energy storage inverter PCS through the cloud server; the charging and discharging instructions can carry the target SOC value.

[0072] In one embodiment, the charge and discharge instruction is used to indicate that battery replenishment is required; the charge and discharge instruction carries a charge and discharge start time determined based on the charging cost;

[0073] The method also includes:

[0074] According to the preset interval, the remaining time for charge and discharge startup is sent to the energy storage converter PCS; the remaining time for charge and discharge startup is the remaining time from the current time to the charge and discharge startup time.

[0075] Among them, the preset interval can be set according to actual conditions. In the embodiment of the present application, the preset interval is 1 second as an example for explanation.

[0076] It should be noted that the charge and discharge start time can be set according to the charging cost. For example, the electricity prices in different regions and at different times are different, and the corresponding charge and discharge start time can be set according to the electricity prices in different regions and at different times.

[0077] Specifically, when the charge and discharge instructions are used to indicate the need for battery replenishment, the battery management system BMS can record the charge and discharge start time and periodically feedback the charge and discharge start remaining time to the energy storage converter PCS every 1 second until the charge and discharge start remaining time is zero.

[0078] In an embodiment of the present application, by sending the remaining time for charge and discharge startup to the energy storage converter PCS at preset intervals, the remaining time for charge and discharge startup can be monitored in real time, so as to adjust the charge and discharge strategy according to actual needs, maximize the performance of the energy storage system, achieve optimal charge and discharge efficiency and performance, and facilitate the completion of subsequent battery replenishment.

[0079] In one embodiment, the charge and discharge instruction is used to instruct execution of battery replacement; the target battery module is a battery module to be replaced in the energy storage system;

[0080] Control the target battery module to charge and discharge based on the charge and discharge instructions, including:

[0081] Discharge the target battery module to a fully discharged state;

[0082] When it is detected that the target battery module is in a fully discharged state, the target battery module is charged to a target SOC value.

[0083] Specifically, when the charge and discharge instructions are used to indicate the execution of battery replacement, the battery management system BMS can request the energy storage converter PCS to force the target battery module to be discharged to an SOC of 0% according to the discharge current limiting matrix, so as to ensure the accuracy of the target battery module SOC; the battery management system BMS can request the target battery module to be forced to be charged to the target SOC value when it detects that the target battery module is in a fully discharged state, that is, when the target battery module SOC is 0%.

[0084] It should be noted that the discharge current limiting matrix may refer to the battery management system BMS limiting the current of the target battery module according to different temperatures and SOC values.

[0085] In the embodiment of the present application, the target battery module is discharged to a fully discharged state, and when the target battery module is detected to be in a fully discharged state, the target battery module is charged to a target SOC value, thereby ensuring the accuracy of the target battery module SOC value, facilitating the adjustment of the SOC of the new and old battery modules to be consistent, and avoiding the problem of a reduction in the actual capacity of the energy storage system due to the difference in SOC between the new and old battery modules.

[0086] S204, based on the charge and discharge instructions, controls the target battery module to charge and discharge. When the target battery module is charged and discharged to the target SOC value, the SOC matching completion information is fed back to the cloud server through the energy storage converter PCS; the SOC matching completion information is used to instruct the cloud server to determine whether to perform battery supplementation or battery replacement.

[0087] Specifically, the battery management system BMS can control the charge and discharge status of the target battery module. The battery management system BMS can obtain the initial SOC value of the target battery module based on the charge and discharge instructions, and compare the target SOC value with the initial SOC value to instruct the target battery module to enter the charging state or the discharging state. When the target battery module is charged and discharged to the target SOC value, the battery management system BMS stops controlling the charge and discharge of the target battery module, and feeds back the SOC matching completion information to the cloud server through the energy storage inverter PCS, so as to adjust the SOC of the new and old battery modules to be consistent, avoiding the problem of high charging and low discharging of the energy storage system and mismatch between SOC and charge and discharge energy due to the difference in SOC between the new and old battery modules.

[0088] In one embodiment, the method further comprises:

[0089] Determine the charge and discharge completion time required for the target battery module to charge and discharge to the target SOC value;

[0090] The charge and discharge completion time is fed back to the energy storage converter PCS.

[0091] Specifically, the battery management system BMS can determine the charge and discharge completion time required for the target battery module to charge and discharge to the target SOC value, and feed back the charge and discharge completion time to the energy storage converter PCS, so as to ensure that the charge and discharge time and power of the target battery module meet the corresponding standard requirements, thereby improving the efficiency and performance of charging and discharging.

[0092] Optionally, when controlling the target battery module to charge and discharge, the battery management system BMS may periodically feed back the remaining charge and discharge time to the energy storage converter PCS at preset intervals.

[0093] For example, when the charge and discharge instruction is used to indicate the need for battery replenishment, the target battery module may refer to the original battery module in the energy storage system, and the charge and discharge completion time may refer to the time required for the target battery module to be charged and discharged from the initial SOC value to the target SOC value; when the charge and discharge instruction is used to indicate the execution of battery replacement, the target battery module may refer to the new battery module for replacement, and the charge and discharge completion time may include the time required for the target battery module to be discharged from the initial SOC value to a fully discharged state, and the time required for the target battery module to be charged from a fully discharged state to the target SOC value.

[0094] In an embodiment of the present application, the charge and discharge completion time required for the target battery module to be charged and discharged to the target SOC value is fed back to the energy storage converter PCS, so as to better control the charge and discharge process of the target battery module and improve the stability and reliability of the energy storage system.

[0095] In one embodiment, determining the charge and discharge completion time required for the target battery module to be charged and discharged to a target SOC value includes:

[0096] Obtain the initial SOC value and rated capacity of the target battery module;

[0097] The charge and discharge completion time is obtained based on the initial SOC value, rated capacity and target SOC value.

[0098] Among them, the initial SOC value and rated capacity of the target battery module can be set according to actual conditions and are not limited in the embodiments of the present application.

[0099] Specifically, the battery management system BMS can obtain the initial SOC value and rated capacity of the target battery module. When the charge and discharge instructions are used to indicate the need for battery replenishment, the battery management system BMS can determine the difference in the amount of electricity that needs to be charged and discharged for the target battery module based on the initial SOC value and the target SOC value, and multiply the difference in electricity by the rated capacity to obtain the capacity difference. The battery management system BMS can also obtain the current size of the current charging and discharging, and determine the charging and discharging completion time based on the capacity difference and the current size.

[0100] For example, the charge and discharge completion time can be obtained by the following formula: ΔSOC=|SOC1−SOC2|; ΔCap=Cap*ΔSOC; T=ΔCap / I;

[0101] Among them, SOC1 can be expressed as the initial SOC value; SOC2 can be expressed as the target SOC value; ΔSOC can be expressed as the capacity difference; Cap can be expressed as the rated capacity in ampere-hours (AH); ΔCap can be expressed as the capacity difference in ampere-hours (AH); I can be expressed as the current size in ampere (A); T can be expressed as the charge and discharge completion time in hours (H).

[0102] For example, when the charge and discharge instructions are used to indicate the execution of battery replacement, the above formulas can be used to calculate the first time required for the target battery module to discharge from the initial SOC value to the fully discharged state, and the second time required for the target battery module to charge from the fully discharged state to the target SOC value, respectively, and the sum of the first time and the second time is determined as the charge and discharge completion time.

[0103] In an embodiment of the present application, by obtaining the initial SOC value and rated capacity of the target battery module, the charge and discharge completion time is obtained based on the initial SOC value, rated capacity and target SOC value, so as to better control the charge and discharge process of the target battery module, improve the charge and discharge accuracy and improve the stability and reliability of the energy storage system.

[0104] In one embodiment, the method further comprises:

[0105] If it is detected that the target battery module cannot be charged or discharged to the target SOC value, the supplementary task failure information will be transmitted to the cloud server through the energy storage converter PCS.

[0106] Specifically, when the charge and discharge instructions are used to indicate the need for battery replenishment, if the battery management system BMS detects that the target battery module cannot be charged and discharged to the target SOC value, that is, the target battery module fails, the replenishment task failure information will be transmitted to the cloud server through the energy storage inverter PCS. At this time, the battery management system BMS can stop charging and discharging the target battery module.

[0107] For example, the battery management system BMS can assist in determining whether a target battery module has failed by collecting voltage and temperature; a failure of a target battery module may include undervoltage of the target battery module's cells due to aging or other factors, or poor wiring due to problems such as the wiring harness process, resulting in failure of voltage and temperature collection; wherein, the battery management system BMS stores fault judgment logic, and triggering the corresponding logic will upload the fault status; for example: undervoltage is determined by whether the minimum value of the cell voltage is lower than a certain threshold; poor wiring can be determined by whether the cell voltage has an invalid value.

[0108] In an embodiment of the present application, by detecting whether the target battery module can be charged and discharged to the target SOC value, when it is determined that the target battery module cannot be charged and discharged to the target SOC value, the supplementary task failure information is transmitted to the cloud server through the energy storage inverter PCS, and the charging and discharging of the target battery module is stopped. While protecting the battery cells of the target battery module, the accuracy of charging and discharging to the target SOC value is improved, and the operation is more convenient.

[0109] In one embodiment, the method further comprises:

[0110] Detecting whether the number of battery modules in the energy storage system increases within a preset time period;

[0111] If yes, the supplementary task completion information is transmitted to the cloud server via the energy storage converter PCS;

[0112] If not, the supplementary task failure information is transmitted to the cloud server through the energy storage converter PCS.

[0113] Among them, the preset time period can be set according to actual conditions. In the embodiment of the present application, a preset time period of 24 hours is used as an example for explanation.

[0114] Specifically, the battery management system BMS can detect whether the number of battery modules in the energy storage system has increased. If an increase in the number of battery modules in the energy storage system is detected within 24 hours, the supplementary task completion information will be transmitted to the cloud server through the energy storage converter PCS; if an increase in the number of battery modules in the energy storage system is not detected within 24 hours, the supplementary task failure information will be transmitted to the cloud server through the energy storage converter PCS.

[0115] In actual applications, the cloud server receives SOC matching completion information that is used to instruct the cloud server to determine the execution of battery replenishment. The user can obtain the SOC matching completion information through the terminal. After the user arrives at the site, the battery management system BMS is shut down and the new battery module is added. After the addition is completed, the battery management system BMS is restarted. The battery management system BMS can detect whether the number of battery modules in the energy storage system has increased.

[0116] In the embodiment of the present application, by detecting whether the number of battery modules in the energy storage system has increased, the corresponding information is transmitted to the cloud server through the energy storage converter PCS, thereby improving the stability and reliability of charging and discharging of the energy storage system.

[0117] In one embodiment, the method further comprises:

[0118] If it is detected that the target battery module cannot be charged or discharged to the target SOC value, the maintenance task failure information will be transmitted to the cloud server through the energy storage converter PCS.

[0119] Specifically, when the charge and discharge instructions are used to instruct the execution of battery replacement, if the battery management system BMS detects that the target battery module cannot be charged and discharged to the target SOC value, that is, the target battery module fails, the maintenance task failure information will be transmitted to the cloud server through the energy storage inverter PCS.

[0120] For example, the manner in which the battery management system BMS is used to detect whether a target battery module has failed has been described above and will not be elaborated in detail in the embodiments of the present application.

[0121] In an embodiment of the present application, by detecting whether the target battery module can be charged and discharged to the target SOC value, when it is determined that the target battery module cannot be charged and discharged to the target SOC value, the maintenance task failure information is transmitted to the cloud server through the energy storage inverter PCS, and the charging and discharging of the target battery module is stopped. While protecting the battery cells of the target battery module, the accuracy of charging and discharging to the target SOC value is improved, and the operation is more convenient.

[0122] In the above-mentioned maintenance method for the energy storage system, the battery management system BMS receives the charge and discharge instructions indicating the target SOC value transmitted by the energy storage converter PCS, and controls the target battery module to charge and discharge based on the charge and discharge instructions. When the target battery module is charged and discharged to the target SOC value, the energy storage converter PCS feeds back the SOC matching completion information to the cloud server to instruct the cloud server to determine whether to perform battery replenishment or battery replacement, so as to adjust the SOC of the new and old battery modules to be consistent, thereby avoiding the problem of reduced actual capacity of the energy storage system due to the difference in SOC between the new and old battery modules.

[0123] In an exemplary embodiment, as shown in FIG3 , the present application further provides a maintenance method for an energy storage system, which is applied to a cloud server in the energy storage system. The method includes:

[0124] S302, processes battery supplementation information or battery replacement information, generates and sends a target SOC value; the target SOC value is used to instruct the energy storage converter PCS to transmit charge and discharge instructions to the battery management system BMS; wherein, the charge and discharge instructions are used to instruct the battery management system BMS to control the target battery module to charge and discharge, and when the target battery module is charged and discharged to the target SOC value, the SOC matching completion information is fed back through the energy storage converter PCS.

[0125] Among them, battery supplement information and battery replacement information can be set according to actual conditions and are not limited in the embodiments of this application.

[0126] Specifically, the cloud server can receive battery supplement information or battery replacement information input by the user through the terminal device, process the battery supplement information or battery replacement information, generate and send the target SOC value to the energy storage converter PCS.

[0127] In one embodiment, the charge and discharge instructions are used to indicate that battery replenishment is required;

[0128] The target SOC value is the remaining SOC value of the battery module to be added to the energy storage system.

[0129] Specifically, when the charge and discharge instructions are used to indicate the need for battery replenishment, the target SOC value can be set to the remaining SOC value of the battery module to be added to the energy storage system, that is, the battery management system BMS can charge and discharge the SOC of the original battery module in the energy storage system to match the SOC of the battery module to be added to the energy storage system.

[0130] In an embodiment of the present application, when the charge and discharge instructions are used to indicate the need for battery replenishment, the target SOC value is set to the remaining SOC value of the battery module to be added to the energy storage system, so as to adjust the SOC of the new and old battery modules to be consistent, thereby avoiding the problem of a reduction in the actual capacity of the energy storage system due to the difference in SOC between the new and old battery modules.

[0131] In one embodiment, the battery supplementary information is a module code of a battery module to be added to the energy storage system;

[0132] Processing battery supplementary information to generate target SOC value, including:

[0133] The target SOC value is determined based on the time interval between the production time and the current time carried in the module code.

[0134] The module code may refer to the module SN (Serial Number).

[0135] Specifically, the cloud server can obtain the current time, and determine the target SOC value according to the time interval between the production time and the current time carried in the module code and the table shown in Figure 4; wherein T in Figure 4 can be represented as the time interval between the production time and the current time, and month represents month.

[0136] For example, as shown in FIG4 , when the time interval between the production time and the current time is less than 3 months, the target SOC value is 24% of the SOC value of the battery module to be newly added to the energy storage system.

[0137] In the embodiment of the present application, the target SOC value is determined based on the time interval between the production time and the current time carried in the module code. By relatively accurately obtaining the SOC value of the battery module to be added to the energy storage system, it is convenient to subsequently adjust the SOC of the new and old battery modules to be consistent, thereby avoiding the problem of the energy storage system being overcharged and undercharged due to the difference in SOC between the new and old battery modules, and the SOC being inconsistent with the charge and discharge energy.

[0138] In one embodiment, the charge and discharge instruction is used to instruct execution of battery replacement; the target battery module is a battery module to be replaced in the energy storage system;

[0139] The target SOC value is the SOC value of the battery module in the energy storage system that is in a fault state.

[0140] Specifically, when the charge and discharge instructions are used to instruct the execution of battery replacement, the cloud server can set the target SOC value to the SOC value of the battery module in the energy storage system that is in a faulty state, so that the subsequent newly replaced battery module can adjust the SOC value to the SOC value of the battery module in the energy storage system that is in a faulty state.

[0141] In the embodiment of the present application, by setting the target SOC value to the SOC value of the battery module in the energy storage system that is in a faulty state, it is convenient to subsequently adjust the SOC of the new and old battery modules to be consistent, thereby avoiding the problem of the energy storage system being overcharged and undercharged due to the difference in SOC between the new and old battery modules, and the SOC being inconsistent with the charge and discharge energy.

[0142] S304: Receive SOC matching completion information and determine whether to perform battery supplementation or battery replacement.

[0143] Specifically, the cloud server can receive the SOC matching completion information fed back by the battery management system BMS through the energy storage converter PCS, and determine whether to perform battery supplementation or battery replacement based on the SOC matching completion information.

[0144] The above-mentioned maintenance method for the energy storage system generates and sends a target SOC value by processing battery supplementation information or battery replacement information, and receives SOC matching completion information to determine whether to perform battery supplementation or battery replacement, thereby facilitating the subsequent adjustment of the SOC of the new and old battery modules to be consistent, thereby avoiding the problem of the energy storage system being overcharged and undercharged due to the difference in SOC between the new and old battery modules, and the SOC and charge and discharge energy being inconsistent.

[0145] To facilitate understanding by those skilled in the art, the following describes a maintenance method for an energy storage system in which charge and discharge instructions are used to indicate the need for battery replenishment, using a specific example, as shown in FIG5 , wherein the cloud platform / APP (Application) may refer to a cloud server / terminal device, hereinafter referred to as cloud / APP; PCS may refer to an energy storage converter PCS; and SBR battery may refer to a household battery system (Sungrow Battery Residential), wherein the battery management system BMS may be used to manage the SBR battery.

[0146] When adding a battery module, the SOC of the on-site battery module (target battery module) needs to be adjusted to the SOC value of the "new battery module". The maintenance personnel obtain the new battery module, connect to the user's on-site battery system through the cloud / APP, set "Add battery module (ON)", that is, the charge and discharge instructions used to indicate the need for battery addition, trigger input or scan the SN code of the "new battery module", and the cloud / APP estimates the SOC of the new module, that is, the "target SOC", and sets the "charge and discharge start time" and sends it to the PCS;

[0147] Among them, after the cloud / APP obtains the SN code of the battery module, it estimates the remaining SOC corresponding to the new battery module according to the table in Figure 4 based on the current system time and the time interval in the SN code, that is, obtains the target SOC value.

[0148] The PCS sends the "add battery module", "target SOC" and "charge and discharge start time" to the BMS; the BMS records the "charge and discharge start time" and periodically feeds back the "charge and discharge start remaining time" to the PCS. After the start time (time difference, in hours) is reached, it requests forced charging or discharging to the target SOC based on the "target SOC" and the SOC of the system at this time, and calculates the estimated charge and discharge completion time, and periodically feeds back to the PCS; after the BMS charges and discharges to the target SOC, it stops charging and discharging, and feeds back to the PCS that the target SOC matching has been completed. The PCS then feeds back to the cloud / APP that the battery has completed the target SOC matching.

[0149] After the BMS completes the target SOC matching, it maintains the supplement flag, stops charging and discharging (maintains the on-site SOC), and waits for the new battery module to be supplemented; if the BMS cannot continue charging and discharging to match the target SOC due to battery failure or other reasons during the charging and discharging process, the BMS exits the supplement and feedbacks the PCS "supplement task failed", and the PCS feedbacks the cloud / APP battery "supplement task failed".

[0150] After the maintenance personnel arrive at the user's site, the battery is shut down and the new battery modules are added. After the actual addition is completed, the battery BMS detects the increase in the number of battery modules, the BMS exits the addition, and feedbacks "addition task successful" to the PCS, which then feedbacks "addition task successful" to the cloud / APP battery. If no change in the number of battery modules is detected for a long time (24 hours, the addition timeout period), the BMS determines that the addition has timed out, the BMS automatically exits the addition, and feedbacks "addition task failed" to the PCS, which then feedbacks "addition task failed" to the cloud / APP battery.

[0151] If the maintenance personnel give up supplementing midway, they can send the "add battery module (OFF)" command through the APP to the PCS, which will transparently transmit it to the BMS, and the BMS will exit the supplementation; after exiting the supplementation, the BMS will clear the supplementation flag and notify the PCS to exit the battery supplementation state.

[0152] To facilitate understanding by those skilled in the art, a maintenance method for an energy storage system in which charge and discharge instructions are used to indicate the need for battery replacement is described below with reference to a specific example, as shown in FIG6 , wherein the cloud platform / APP may refer to a cloud server / terminal device, hereinafter referred to as cloud / APP; the PCS may refer to an energy storage converter PCS; and the SBR battery may refer to a household battery system, wherein the battery management system BMS may be used to manage the SBR battery, and the battery management system BMS is the BMS in the maintenance tooling.

[0153] When a battery module fails at a user's site and needs to be replaced, the new battery module (target battery module) needs to be discharged to SOC0% and calibrated before being delivered to the user's site. It must then be charged to the "target SOC value" after the battery failure at the user's site. The main operations are performed in the warehouse.

[0154] It should be noted that maintenance personnel can view battery module faults through the cloud / app. Common faults include overvoltage, undervoltage, and disconnection. The target SOC value is the SOC value after the user's on-site protection "stop charging and discharging" is activated, and this SOC must be confirmed in advance. Specialized maintenance tooling (a PCS (with grid connection requirements), WiNet (wireless network), and a set of battery accessories) is required. The PCS charges and discharges a single-module battery (the target battery module) in the warehouse.

[0155] After the cloud / APP is connected to the warehouse maintenance tooling battery system (single-module battery), "Battery module maintenance (ON)" and "Target SOC" (user site battery system SOC) are set on it and sent to PCS;

[0156] The PCS sends the "Replace Battery Module (ON)" and "Target SOC" to the maintenance tool BMS, that is, the charge and discharge instructions are used to indicate that a battery replacement is required; the BMS estimates the expected charge and discharge completion time, and periodically feeds back to the PCS, and requests forced discharge to 0% SOC from the PCS according to the discharge current limit matrix to ensure the accuracy of the SOC; then after requesting forced charging to the target SOC, the maintenance flag is cleared, the PCS is notified to exit the battery maintenance state, and the PCS is fed back "Maintenance task successful", and the PCS feeds back "Maintenance task successful" to the cloud / APP battery; if the battery charge and discharge process cannot continue due to a fault or other reasons, and the target SOC match is not completed, the PCS is fed back "Maintenance task failed", and the PCS feeds back "Maintenance task failed" to the cloud / APP battery, and the BMS exits maintenance; if the maintenance personnel give up the maintenance work midway, they can send a "Replace Battery Module (OFF)" instruction through the APP, send it to the PCS, and the PCS transmits it to the BMS, and the BMS exits the battery maintenance.

[0157] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0158] Based on the same inventive concept, embodiments of the present application also provide an energy storage system maintenance device for implementing the aforementioned energy storage system maintenance method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more energy storage system maintenance device embodiments provided below can be found in the aforementioned limitations of the energy storage system maintenance method and will not be further elaborated here.

[0159] In an exemplary embodiment, as shown in FIG7 , a maintenance device 700 for an energy storage system is provided, which is applied to a battery management system BMS in the energy storage system. The device 700 includes:

[0160] The instruction receiving module 701 is used to receive a charge and discharge instruction indicating a target SOC value transmitted by the energy storage converter PCS; wherein the target SOC value is generated by the cloud server processing battery supplementation information or battery replacement information and sent to the energy storage converter PCS;

[0161] The information feedback module 702 is used to control the charging and discharging of the target battery module based on the charging and discharging instructions. When the target battery module is charged and discharged to the target SOC value, the SOC matching completion information is fed back to the cloud server through the energy storage converter PCS; the SOC matching completion information is used to instruct the cloud server to determine whether to perform battery supplementation or battery replacement.

[0162] In one embodiment, the instruction receiving module 701 is further configured to determine the charge and discharge completion time required for the target battery module to be charged and discharged to the target SOC value;

[0163] The charge and discharge completion time is fed back to the energy storage converter PCS.

[0164] In one embodiment, the instruction receiving module 701 is further configured to obtain an initial SOC value and a rated capacity of a target battery module;

[0165] The charge and discharge completion time is obtained based on the initial SOC value, rated capacity and target SOC value.

[0166] In one embodiment, the charge and discharge instruction is used to indicate that battery replenishment is required; the charge and discharge instruction carries a charge and discharge start time determined based on the charging cost;

[0167] The instruction receiving module 701 is further configured to send the charge and discharge start remaining time to the energy storage converter PCS according to a preset interval; the charge and discharge start remaining time is the remaining time from the current time to the charge and discharge start time.

[0168] In one embodiment, the information feedback module 702 is further configured to transmit supplementary task failure information to the cloud server via the energy storage converter PCS if it is detected that the target battery module cannot be charged or discharged to the target SOC value.

[0169] In one embodiment, the information feedback module 702 is further configured to detect whether the number of battery modules in the energy storage system increases within a preset time period;

[0170] If yes, the supplementary task completion information is transmitted to the cloud server via the energy storage converter PCS;

[0171] If not, the supplementary task failure information is transmitted to the cloud server through the energy storage converter PCS.

[0172] In one embodiment, the charge and discharge instruction is used to instruct execution of battery replacement; the target battery module is a battery module to be replaced in the energy storage system;

[0173] The information feedback module 702 is further configured to discharge the target battery module to a fully discharged state;

[0174] When it is detected that the target battery module is in a fully discharged state, the target battery module is charged to a target SOC value.

[0175] In one embodiment, the information feedback module 702 is further configured to transmit maintenance task failure information to the cloud server via the energy storage converter PCS if it is detected that the target battery module cannot be charged or discharged to the target SOC value.

[0176] In an exemplary embodiment, as shown in FIG8 , a maintenance device 700 for an energy storage system is provided, which is applied to a cloud server in the energy storage system. The device 800 includes:

[0177] A generation and transmission module 801 is used to process battery supplementation information or battery replacement information, generate and transmit a target SOC value; the target SOC value is used to instruct the energy storage converter PCS to transmit charge and discharge instructions to the battery management system BMS; wherein the charge and discharge instructions are used to instruct the battery management system BMS to control the target battery module to charge and discharge, and when the target battery module is charged and discharged to the target SOC value, the energy storage converter PCS is used to feedback SOC matching completion information;

[0178] The information receiving module 802 is used to receive the SOC matching completion information and determine whether to perform battery supplementation or battery replacement.

[0179] In one embodiment, the charge and discharge instructions are used to indicate that battery replenishment is required;

[0180] The target SOC value is the remaining SOC value of the battery module to be added to the energy storage system.

[0181] In one embodiment, the battery supplementary information is a module code of a battery module to be added to the energy storage system;

[0182] The generating and sending module 801 is further used to determine the target SOC value according to the time interval between the production time and the current time carried in the module code.

[0183] In one embodiment, the charge and discharge instruction is used to instruct execution of battery replacement; the target battery module is a battery module to be replaced in the energy storage system;

[0184] The target SOC value is the SOC value of the battery module in the energy storage system that is in a fault state.

[0185] Each module in the energy storage system maintenance device described above can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor within an electronic device in hardware form, or stored in a memory within the electronic device in software form, allowing the processor to call and execute the corresponding operations of each module.

[0186] In an exemplary embodiment, an energy storage system is provided, comprising:

[0187] Energy storage converter PCS;

[0188] A battery management system BMS connected to the energy storage converter PCS, the battery management system BMS is used to implement the steps of the above method;

[0189] The cloud server connected to the energy storage converter PCS is used to implement the steps of the above method.

[0190] It should be noted that the battery management system BMS can be a battery management system BMS in the energy storage system, and can also be a battery management system BMS of a maintenance tool in the energy storage system.

[0191] In an exemplary embodiment, an electronic device is provided, which may be a server, and its internal structure diagram may be shown in Figure 9. The electronic device includes a processor, a memory, an input / output interface (I / O) and a communication interface. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface is connected to the system bus via the input / output interface. The processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the electronic device is used to store corresponding information and instructions. The input / output interface of the electronic device is used to exchange information between the processor and an external device. The communication interface of the electronic device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a maintenance method for an energy storage system is implemented.

[0192] Those skilled in the art will understand that the structure shown in Figure 9 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the electronic device to which the solution of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0193] In an exemplary embodiment, an electronic device is provided, including a memory and a processor. The memory stores a computer program, and the processor implements the above-mentioned energy storage system maintenance method when executing the computer program.

[0194] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processor involved in the various embodiments provided herein may be, but are not limited to, a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, and the like.

[0195] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0196] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A maintenance method for an energy storage system, characterized in that: A battery management system BMS applied to the energy storage system, the method comprising: Receiving a charge and discharge instruction indicating a target SOC value transmitted by the energy storage converter PCS; wherein the target SOC value is generated by the cloud server processing battery supplementation information or battery replacement information and sent to the energy storage converter PCS; Controlling the target battery module to charge and discharge based on the charge and discharge instructions, and when the target battery module is charged and discharged to the target SOC value, feeding back SOC matching completion information to the cloud server through the energy storage converter PCS; The SOC matching completion information is used to instruct the cloud server to determine whether to perform battery supplementation or battery replacement.

2. The method according to claim 1, characterized in that The method further comprises: Determining the charge and discharge completion time required for the target battery module to be charged and discharged to the target SOC value; The charge and discharge completion time is fed back to the energy storage converter PCS.

3. The method according to claim 2, characterized in that The determining the charge and discharge completion time required for the target battery module to be charged and discharged to the target SOC value includes: Obtaining an initial SOC value and a rated capacity of the target battery module; The charge and discharge completion time is obtained according to the initial SOC value, the rated capacity and the target SOC value.

4. The method according to any one of claims 1 to 3, characterized in that: The charge and discharge instruction is used to indicate that battery supplementation is required; the charge and discharge instruction carries a charge and discharge start time determined based on the charging cost; The method further comprises: According to the preset interval, the remaining time for charge and discharge startup is sent to the energy storage converter PCS; the remaining time for charge and discharge startup is the remaining time from the current time to the charge and discharge startup time.

5. The method according to claim 4, characterized in that The method further comprises: If it is detected that the target battery module cannot be charged or discharged to the target SOC value, the supplementary task failure information is transmitted to the cloud server via the energy storage inverter PCS.

6. The method according to claim 4, characterized in that The method further comprises: Within a preset time period, detecting whether the number of battery modules in the energy storage system increases; If yes, the additional task completion information is transmitted to the cloud server via the energy storage converter PCS; If not, the supplementary task failure information is transmitted to the cloud server via the energy storage converter PCS.

7. The method according to any one of claims 1 to 3, characterized in that: The charge and discharge instruction is used to instruct the execution of battery replacement; the target battery module is a battery module to be replaced in the energy storage system; The controlling the target battery module to charge and discharge based on the charge and discharge instruction includes: Discharging the target battery module to a fully discharged state; When it is detected that the target battery module is in the fully discharged state, the target battery module is charged to the target SOC value.

8. The method according to claim 7, characterized in that The method further comprises: If it is detected that the target battery module cannot be charged or discharged to the target SOC value, the maintenance task failure information is transmitted to the cloud server via the energy storage inverter PCS.

9. A method for maintaining an energy storage system, characterized in that: Applied to the cloud server in the energy storage system, the method comprises: Processing battery supplementation information or battery replacement information, generating and sending a target SOC value; the target SOC value is used to instruct the energy storage converter PCS to transmit charge and discharge instructions to the battery management system BMS; wherein the charge and discharge instructions are used to instruct the battery management system BMS to control the target battery module to charge and discharge, and when the target battery module is charged and discharged to the target SOC value, the SOC matching completion information is fed back through the energy storage converter PCS; The SOC matching completion information is received, and it is determined whether to perform battery supplementation or battery replacement.

10. The method according to claim 9, characterized in that The charge and discharge instructions are used to indicate that battery replenishment is required; The target SOC value is the remaining SOC value of the battery module to be added to the energy storage system.

11. The method according to claim 10, characterized in that The battery supplementary information is the module code of the battery module to be added to the energy storage system; The processing of the battery supplementary information to generate the target SOC value includes: The target SOC value is determined according to the time interval between the production time carried in the module code and the current time.

12. The method according to claim 9, characterized in that The charge and discharge instruction is used to instruct the execution of battery replacement; the target battery module is a battery module to be replaced in the energy storage system; The target SOC value is the SOC value of the battery module in the energy storage system that is in a fault state.

13. A maintenance device for an energy storage system, characterized in that: A battery management system BMS applied to the energy storage system, the device comprising: An instruction receiving module, used to receive a charge and discharge instruction indicating a target SOC value transmitted by the energy storage converter PCS; wherein the target SOC value is generated by the cloud server processing battery supplementation information or battery replacement information and sent to the energy storage converter PCS; An information feedback module is used to control the target battery module to charge and discharge based on the charge and discharge instructions. When the target battery module is charged and discharged to the target SOC value, the SOC matching completion information is fed back to the cloud server through the energy storage inverter PCS; the SOC matching completion information is used to instruct the cloud server to determine whether to perform battery supplementation or battery replacement.

14. A maintenance device for an energy storage system, characterized in that: Applied to the cloud server in the energy storage system, the device comprises: A generating and sending module is used to process battery supplementation information or battery replacement information, generate and send a target SOC value; the target SOC value is used to instruct the energy storage inverter PCS to transmit charge and discharge instructions to the battery management system BMS; wherein the charge and discharge instructions are used to instruct the battery management system BMS to control the target battery module to charge and discharge, and when the target battery module is charged and discharged to the target SOC value, the SOC matching completion information is fed back through the energy storage inverter PCS; an information receiving module is used to receive the SOC matching completion information and determine whether to perform battery supplementation or battery replacement.

15. An energy storage system, characterized in that: include: Energy storage converter PCS; A battery management system BMS connected to the energy storage converter PCS, wherein the battery management system BMS is used to implement the steps of any one of the methods of claims 1 to 8; A cloud server connected to the energy storage converter PCS, wherein the cloud server is used to implement the steps of the method described in any one of claims 9 to 12.

16. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 12 are implemented.

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