UPS configuration method and device and energy storage system

Abstract

The invention discloses a UPS configuration method and device and an energy storage system, and the method comprises the steps: determining a first rated peak power according to the load power of each load unit in the energy storage system; determining target rated peak power according to the first rated peak power and overload parameters of the UPS subsystem; and determining a target UPS host in the UPS subsystem according to the target rated peak power. According to the UPS configuration method provided by the invention, the power of the required UPS host can be accurately evaluated, so that UPS accurate type selection is carried out, the stability of an energy storage system is improved, and the operation and maintenance efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of power and energy technology, and in particular to a UPS configuration method, device and energy storage system. Background Art

[0002] In the application of large-scale energy storage container battery subsystem (BESS), the container battery subsystem includes multiple battery clusters, fire-fighting equipment, thermal management modules, etc. After multiple battery clusters are connected in parallel to the junction cabinet, they are connected to the DC side of the energy storage inverter. Each battery cluster contains multiple battery packs and a high-voltage box. The battery pack is equipped with a first-level battery management module (BMU) to collect battery temperature and voltage information. The high-voltage box is equipped with a second-level battery management module (BCMU) and an electrical circuit, which are responsible for processing battery cluster information and switching on and off the battery cluster circuit. The junction cabinet is equipped with a third-level battery management module (BAMS) and an electrical circuit, which are responsible for processing the overall battery system information and switching on and off the battery system circuit to ensure the stable operation of the system.

[0003] In order to ensure that important equipment such as fire-fighting equipment and BAMS in the battery subsystem of a large energy storage container can be continuously powered in the event of abnormal mains power or power outage, an uninterruptible power supply system (UPS) is generally installed in the battery subsystem of a large energy storage container.

[0004] Therefore, the selection of UPS has an important impact on the operation of large energy storage container battery systems. Summary of the invention

[0005] Based on this, an object of an embodiment of the present application is to provide a UPS configuration method, device and energy storage system.

[0006] In a first aspect, an embodiment of the present application provides a UPS configuration method, which is applied to an energy storage system, wherein the energy storage system includes a UPS subsystem, and the UPS configuration method includes:

[0007] Determining a first rated peak power according to the load power of each load unit in the energy storage system;

[0008] Determining a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem;

[0009] A target UPS host in the UPS subsystem is determined according to the target rated peak power.

[0010] In combination with the first aspect, in a possible implementation, determining the first rated peak power according to the load power of each load unit in the energy storage system includes: determining the second rated peak power according to the load power of each load unit; determining the first rated peak power according to a preset altitude rule and the second rated peak power, wherein the first rated peak power and the second rated peak power represent rated peak powers corresponding to different altitudes, and the altitude corresponding to the first rated peak power is greater than the altitude corresponding to the second rated peak power.

[0011] In combination with the first aspect, in a possible implementation method, determining the target rated peak power based on the first rated peak power and the overload parameters of the UPS subsystem includes: determining the target overload power coefficient corresponding to the overload parameters of the UPS subsystem based on the overload parameters of the UPS subsystem and a mapping relationship between preset overload parameters and overload power coefficients; and obtaining the target rated peak power based on the target power coefficient and the first rated peak power.

[0012] In combination with the first aspect, in a possible implementation, determining a target UPS host in the UPS subsystem according to the target rated peak power includes: matching a UPS host model according to the target rated peak power to obtain a target UPS host, wherein the power corresponding to the UPS host model of the target UPS host is greater than or equal to the target rated peak power.

[0013] In combination with the first aspect, in a possible implementation, after determining the target UPS host in the UPS subsystem according to the target rated peak power, the method further includes: determining the target discharge power of each alternative battery corresponding to the target UPS host according to the target rated peak power and the number of battery cells of the alternative battery; determining the discharge time at the target discharge power according to the target discharge power and the nominal voltage of the alternative battery; matching the battery model according to the discharge time and the target discharge power, and determining the target alternative battery corresponding to the target UPS host, the battery parameters corresponding to the battery model of the target alternative battery matching the discharge time and the target discharge power.

[0014] In combination with the first aspect, in a possible implementation method, determining the discharge time at the target discharge power according to the target discharge power and the nominal voltage of the alternative battery includes: obtaining the discharge time corresponding to the target discharge power at the nominal voltage according to the target discharge power, the nominal voltage and a preset discharge power schedule, wherein the preset discharge power schedule is used to represent the mapping relationship between the target discharge power, the nominal voltage and the discharge time.

[0015] In combination with the first aspect, in a possible implementation manner, the method further includes: testing the target UPS host and a target candidate battery corresponding to the target UPS host to obtain a performance evaluation result of the target UPS host.

[0016] In combination with the first aspect, in a possible implementation manner, the method further includes: acquiring a battery health status corresponding to the target candidate battery in real time; and providing a prompt according to the health status of the target candidate battery.

[0017] In a second aspect, an embodiment of the present application provides a UPS configuration device, which is applied to an energy storage system, wherein the energy storage system includes a UPS subsystem, and the device includes:

[0018] An acquisition unit, configured to determine a first rated peak power according to a load power of each load unit in the energy storage system;

[0019] a determining unit, configured to determine a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem;

[0020] The determining unit is further configured to determine a target UPS host in the UPS subsystem according to the target rated peak power.

[0021] In a third aspect, an embodiment of the present application provides an energy storage system, characterized in that it includes a UPS subsystem and a container battery subsystem, and the system includes: the container battery subsystem, used to obtain the load power of each load unit in the energy storage system and transmit it to the UPS subsystem; the UPS subsystem, used to determine a first rated peak power according to the load power of each load unit in the energy storage system; and also used to determine a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem; and also used to determine a target UPS host in the UPS subsystem according to the target rated peak power.

[0022] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the UPS configuration method as described in the first aspect.

[0023] In an embodiment of the present application, the first rated peak power is first determined according to the load power of each load unit in the energy storage system, and then the target rated peak power is determined according to the first rated peak power and the overload parameter of the UPS subsystem, and finally, the target UPS host in the UPS subsystem is determined according to the target rated peak power. Therefore, this embodiment can accurately evaluate and determine the first rated peak power of the UPS host in the UPS subsystem according to the load power of each load unit in the energy storage system, so that the UPS subsystem can more accurately match the actual needs of the energy storage system, avoiding the problem of excess or insufficient performance caused by improper selection, and further considering the combined evaluation of the first rated peak power and the overload parameter, it can ensure the stable operation of the UPS subsystem under extreme or unstable conditions, thereby ensuring the stable operation of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. 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 labor.

[0025] Figure 1 This is a schematic diagram of an energy storage system in one embodiment of the present application;

[0026] Figure 2 It is a flowchart of a UPS configuration method in one embodiment of the present application;

[0027] Figure 3 is a structural schematic diagram of a UPS configuration device in one embodiment of the present application;

[0028] Figure 4 It is a structural schematic diagram of an energy storage system in one embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0030] It should be noted that, if there is no conflict, the various features in the embodiments of the present application can be combined with each other, all within the scope of protection of the present application. In addition, although the functional module division is performed in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in a sequence different from the module division in the device or the flow chart. Furthermore, the words "first", "second", "third", etc. used in this application do not limit the data and execution order, but only distinguish the same items or similar items with basically the same functions and effects.

[0031] See also Figure 1 , Figure 1 A schematic diagram of an energy storage system provided in an embodiment of the present application, wherein the energy storage system 10 includes a UPS subsystem 20 and a container battery subsystem 30 .

[0032] The container battery subsystem 30 is used to obtain the load power of each load unit in the energy storage system 10 and transmit it to the UPS subsystem 20;

[0033] The UPS subsystem 20 is used to determine a first rated peak power according to the load power of each load unit in the energy storage system 10; it is also used to determine a target rated peak power according to the first rated peak power and the overload parameter of the UPS subsystem 10; it is also used to determine a target UPS host in the UPS subsystem 10 according to the target rated peak power.

[0034] The container battery subsystem 30 includes a three-level battery management module 40 .

[0035] The UPS (Uninterruptible Power Supply) subsystem 20 is used to quickly switch and provide continuous power supply when a main power supply fails.

[0036] In one embodiment, the UPS subsystem 20 includes: a UPS host 201 for converting direct current into alternating current; and a backup battery 202 for providing continuous power supply when the main power source is disconnected. The backup battery 202 may be a lead-acid battery or a lithium battery.

[0037] The container battery subsystem 30 is used to store electric energy and release it to the power grid or directly supply it to the load. The container battery subsystem 30 includes: a battery cluster, a high-voltage box, a junction box, a sensor, a fire-fighting equipment, etc.

[0038] The container battery subsystem 30 includes multiple battery clusters, each of which includes multiple battery packs and a high-voltage box. Each battery pack contains multiple battery cells. A primary battery management module (BMU) is provided in the battery pack to collect the temperature and voltage information of the battery. A secondary battery management module (BCMU) and an electrical circuit are provided in the high-voltage box to process the information of the battery cluster and control the electrical circuit of the battery cluster. The battery collection panel (BCP) connects multiple battery clusters in parallel and then connects them to the DC side of the power storage inverter (PCS). Among them, a tertiary battery management module (BAMS) and an electrical circuit are provided in the collection cabinet to process the battery system information and to open and close the battery system circuit.

[0039] The three-level battery management module 40 is used for status monitoring, data processing, fault diagnosis, communication interface, alarm and protection. Among them, status monitoring is to monitor the battery status in real time, including voltage, current, temperature, etc.; data processing is to analyze the monitoring data to predict the health status and life of the battery; fault diagnosis is to detect and diagnose faults in the battery subsystem; communication interface is to exchange data with the UPS subsystem and other external systems (such as EMS, SCADA); alarm and protection is to sound an alarm and take protective measures when abnormal conditions occur.

[0040] There is a physical connection and a communication connection between the UPS subsystem 20 and the container battery subsystem 30. Through the physical connection and the communication connection, the UPS subsystem 20 and the container battery subsystem 30 can work together. For example, when the power grid is supplying power normally, the container battery subsystem 30 can be charged according to the load conditions and the electricity price strategy. When the power grid fails, the container battery subsystem 30 can automatically switch to the UPS mode, and the UPS subsystem 20 provides power to ensure the uninterrupted operation of key equipment.

[0041] In one embodiment, when the power grid is normally powered, the electric energy stored in the container battery subsystem 30 is transmitted to the UPS subsystem 20 through a physical connection (e.g., a power transmission line). When the power demand increases or when the power grid is interrupted, the electric energy provided by the container battery subsystem 30 is replaced by the UPS subsystem 20 to maintain the operation of key equipment.

[0042] In one embodiment, a communication connection is established between the UPS subsystem 20 and the container battery subsystem 30 to exchange status information and control commands. The communication connection includes wired communication and wireless communication. Wired communication can be connected and communicated through RS485 interface, Ethernet interface, etc. These interfaces are used to transmit control commands and system status information, such as battery power, load demand, system health status, etc. Wireless communication can be Wi-Fi or Bluetooth, etc.

[0043] In the related art, when configuring the UPS subsystem 20, there are at least the following problems: the load power of the container battery subsystem 30 cannot be accurately assessed, resulting in improper selection of the UPS host, causing poor system matching, increasing costs or failing to meet project requirements; the impact of high altitude areas on the backup power time and output power of the UPS subsystem is not fully considered; there is a lack of monitoring of the life of the backup batteries (for example, lead-acid batteries) in the UPS subsystem, and the remaining service life of the backup batteries cannot be accurately determined, so that the operation and maintenance personnel cannot be prompted to replace the backup batteries in time, which may result in the backup batteries being unable to provide support at critical moments, thereby affecting the UPS subsystem's ability to provide continuous power supply.

[0044] In view of this, this application proposes a UPS configuration method. Figure 2 , Figure 2 A flow chart of a UPS configuration method provided in an embodiment of the present application. The method comprises the following steps:

[0045] S10. Determine a first rated peak power according to the load power of each load unit in the energy storage system.

[0046] Among them, each load unit is located in the load set of the energy storage system. The load set refers to the set of all load units that need to be powered in the energy storage system. The specific location of the load set is the container battery subsystem in the energy storage system.

[0047] The load unit may include but is not limited to a battery cluster, a combiner cabinet, a sensor, and a fire-fighting device. That is, the load set may include but is not limited to a battery cluster, a combiner cabinet, a sensor, and a fire-fighting device.

[0048] Among them, the load power of each load unit can be obtained from the technical specification of the equipment or the data provided by the manufacturer, and is not the only limitation here. Among them, the first rated peak power is the rated peak power corresponding to the UPS host required in the UPS subsystem when a certain altitude threshold is reached. For example, the altitude threshold can be 5000 meters. The first rated peak power refers to the maximum power demand that the UPS host required in the UPS subsystem can carry when a certain altitude threshold is reached.

[0049] The first rated peak power may be calculated based on the load power of each load unit in the energy storage system and a preset altitude rule.

[0050] In one embodiment, a first rated peak power is determined according to the load power of each load unit in the energy storage system, including: determining a second rated peak power according to the load power of each load unit; determining the first rated peak power according to a preset altitude rule and the second rated peak power, wherein the first rated peak power and the second rated peak power represent rated peak powers corresponding to different altitudes, and the altitude corresponding to the first rated peak power is greater than the altitude corresponding to the second rated peak power.

[0051] For example, when the load units are battery clusters, combiner cabinets, sensors, and firefighting equipment, the load power of each load unit can be shown in Table 1 below:

[0052] Table 1

[0053]

[0054]

[0055] As shown in the table above, when the load unit is a combiner cabinet, the combiner cabinet contains components such as MBMU, HMI display screen, disconnector, indicator light, etc., where each component has its own power, such as W1-W9 in Table 1, which respectively represent the power of the corresponding load. Therefore, the load power corresponding to the combiner cabinet is the sum of the power of all components. Similarly, when the load unit is a battery cluster, the battery cluster contains components such as BMU, high-voltage box (BCMU and control part), etc. Therefore, the load power corresponding to the battery cluster is the sum of the power of all components.

[0056] The * in Table 1 indicates multiplication.

[0057] The second rated peak power indicates the rated peak power corresponding to the UPS host at a reference altitude (assuming it is below 3,000 meters), that is, the maximum power demand that the UPS host can bear. The load powers of all load units can be added together to obtain the total load power corresponding to the UPS host required in the UPS subsystem, and the total load power is used as the second rated peak power. For example, taking the data in Table 1 as an example, the second rated peak power is W10.

[0058] The above preset altitude rule may be set as follows: when the altitude is greater than a reference altitude, the UPS output power is reduced by 1% for every 100 meters increase in altitude.

[0059] Furthermore, in determining the first rated peak power according to the preset altitude rule and the second rated peak power, taking the data in Table 1 as an example, the UPS host within the reference altitude corresponds to W10. Assuming W10 is 1728W, then the first rated peak power when reaching a certain altitude threshold (which can be assumed to be 5000 meters) can be calculated based on 1728W and the preset altitude rule, and the first rated peak power is 2073.6W.

[0060] It can be seen that in this embodiment, the power requirements of the load units and the changes in the operating environment (such as altitude) are comprehensively considered to ensure that the UPS subsystem can meet the expected power output requirements under different conditions, and further ensure that when all load units are running at the same time, the entire system can still work stably, ensuring the uninterrupted operation of key equipment when the power supply is interrupted or unstable.

[0061] S20: Determine the target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem, wherein the overload parameter describes the overload degree that the UPS subsystem can accept under the maximum load condition.

[0062] In some embodiments, the overload parameter is expressed as a percentage. For example, a UPS subsystem may need to be able to handle a load that is 20% higher than its nominal load, and its overload parameter would be 20%.

[0063] The overload parameter may be an overload parameter required by the UPS subsystem.

[0064] Among them, the target rated peak power that meets the UPS host load capacity requirements is determined according to the first rated peak power and the overload parameter of the UPS subsystem. That is, in order to ensure that the UPS host can operate stably even under overload conditions, it is necessary to adjust the first rated peak power according to the overload parameter to obtain the target rated peak power. The target rated peak power is the power that the UPS host can provide sufficient power supply under normal operation and overload conditions.

[0065] Among them, meeting the UPS host load capacity requirements can be understood as the power range within which the UPS host can operate stably, as determined during design. This power range takes into account the rated power of the UPS host under normal working conditions and the additional overload capacity.

[0066] It can be seen that this embodiment ensures that the UPS host can not only meet the load requirements under normal working conditions, but also continue to provide stable power support under a certain degree of overload, thereby improving the stability and flexibility of the UPS subsystem.

[0067] In one embodiment, a target rated peak power is determined based on a first rated peak power and an overload parameter of a UPS subsystem, including: determining a target overload power factor corresponding to the overload parameter of the UPS subsystem based on a mapping relationship between the overload parameter of the UPS subsystem and a preset overload parameter and an overload power factor; and obtaining the target rated peak power based on the target power factor and the first rated peak power.

[0068] The mapping relationship can be used to convert the overload parameter into the corresponding overload power factor in the form of a table, a chart or an algorithm. The mapping relationship may be pre-defined in a product manual, a technical specification or a design standard, which maps different overload parameters to specific overload power factors.

[0069] According to the overload parameter of the UPS subsystem, the corresponding overload power coefficient is searched in the preset mapping relationship. The overload power coefficient reflects the additional power capacity that the UPS host needs to have under the overload condition.

[0070] The overload power factor indicates the maximum load increase ratio that the UPS can support under this overload parameter. For example, if the mapping relationship indicates that a 20% overload parameter corresponds to an overload power factor of 1.2, then 1.2 is the target overload power factor.

[0071] For example, if the UPS subsystem needs to be able to handle a load 20% higher than its rated power, the target power factor for the overload parameter might be set to 1.2. This means that the UPS needs to be able to handle 120% of its rated load.

[0072] Among them, in calculating the target rated peak power that meets the UPS host load capacity requirements based on the target power factor and the first rated peak power, it is necessary to consider the overload capacity to offset the instantaneous power consumption. Therefore, it is necessary to subtract the instantaneous power consumption in each load unit from the first rated peak power to obtain the target difference, and multiply the target difference by the target power factor to obtain the target rated peak power.

[0073] Wherein, target rated peak power = (first rated peak power - instantaneous power consumption) * target power factor

[0074] For example, as shown in the data in Table 1, among the load units in Table 1, the one with instantaneous power consumption is the isolating switch in the combiner cabinet, and the instantaneous power consumption is 450. At this time, the target power factor is 1.2, and the first rated peak power is 2073.6W. Therefore, the target rated peak power = (2073.6-450)*1.2, that is, the target rated peak power is 1948.2W. This means that after considering the instantaneous power consumption and overload capacity, the UPS host should be able to provide at least 1948.2W of power to ensure the stability of the system when facing an additional 20% overload.

[0075] It can be seen that in this embodiment, by taking the load capacity requirements into consideration, according to the overload parameters and the corresponding target overload power factor, the target rated peak power that accurately meets the UPS host load capacity requirements is obtained, ensuring that the UPS system can not only meet the requirements under normal operating conditions during design and operation, but also effectively cope with possible overload conditions, thereby increasing the stability of the system.

[0076] S30. Determine a target UPS host in the UPS subsystem according to the target rated peak power.

[0077] According to the target rated peak power, a UPS host with corresponding or slightly higher output power capacity is selected as the target UPS host, ensuring that the output power of the target UPS host can not only meet the current load demand, but also have room to cope with possible expansion or unforeseen additional loads.

[0078] The target UPS host can be set as an online UPS with an emergency switching time of 0.

[0079] It can be seen that in this embodiment, selecting an appropriate UPS host ensures that the UPS subsystem can work stably when the power grid is supplying power normally.

[0080] This embodiment can accurately evaluate and determine the first rated peak power of the UPS host in the UPS subsystem according to the load power of each load unit in the energy storage system, so that the UPS subsystem can more accurately match the actual needs of the energy storage system, avoiding the problem of excess or insufficient performance caused by improper selection. Further considering the combined evaluation of the first rated peak power and the overload parameter, it can ensure the stable operation of the UPS subsystem under extreme or unstable conditions, thereby ensuring the stable operation of the energy storage system.

[0081] In one embodiment, a target UPS host in a UPS subsystem is determined according to a target rated peak power, including: matching a UPS host model according to the target rated peak power to obtain a target UPS host, wherein the power corresponding to the UPS host model of the target UPS host is greater than or equal to the target rated peak power.

[0082] The power corresponding to the UPS host model of the target UPS host is greater than or equal to the target rated peak power, so as to ensure that the UPS can sufficiently support the maximum expected load and leave a certain margin to cope with possible overload conditions.

[0083] Among them, the process of matching the UPS host model according to the target rated peak power is as follows: before selecting the UPS host model, collect and organize the model information of various UPS hosts and the output power corresponding to each model, and according to the target rated peak power, filter out all UPS host models with output power greater than or equal to the rated peak power.

[0084] It can be seen that in this embodiment, selecting an appropriate UPS host ensures that the UPS subsystem can work stably when the power grid is supplying power normally.

[0085] In one embodiment, after determining a target UPS host in a UPS subsystem according to a target rated peak power, the method further includes: determining a target discharge power of each optional battery corresponding to the target UPS host according to the target rated peak power and the number of battery cells of the optional battery; determining a discharge time at the target discharge power according to the target discharge power and the nominal voltage of the optional battery; matching battery models according to the discharge time and the target discharge power to determine a target optional battery corresponding to the target UPS host, wherein the battery parameters corresponding to the battery model of the target optional battery are consistent with the discharge time and the target discharge power.

[0086] Among them, when determining the target alternative battery, it is necessary to evaluate the backup power demand and select the alternative battery configuration.

[0087] Specifically, assessing the backup power demand means determining the length of time the UPS needs to provide power when the power is interrupted. This length of time can be determined based on the business continuity plan or the operating requirements of key equipment. Common backup power demand requirements range from a few minutes to a few hours, which is sufficient to cover most short power outages or provide enough time for critical business to migrate to backup power.

[0088] Specifically, the selection of the alternative battery configuration can be based on the backup power demand and the specifications of the target UPS host, selecting the corresponding alternative battery configuration, which means selecting a UPS with a built-in larger capacity battery, an external additional battery module or a battery cabinet to ensure that the backup power time requirement can be met.

[0089] Among them, the target backup battery can be set as a lead-acid battery. Since the function of UPS is to connect the power supply at the moment of power failure, when the lead-acid battery is in a fully charged floating charge state for a long time, it is in its best state, and its battery cell capacity decays and ages the slowest. When there is a sudden power outage, it can be handled by the fully charged floating charge state. When a lithium battery is in a fully charged floating charge state for a long time, its performance will decay rapidly due to the memory effect. According to statistics from relevant users, when a lithium battery is in a 100% fully charged state for a long time and the temperature is at room temperature, its capacity will decay by 40% within one year. After two years, its capacity will be greatly decayed. In some embodiments, the target backup battery can also be a lithium battery. In some embodiments, the lithium battery can be calibrated to float charge to 60% of the maximum capacity to extend its standby life.

[0090] Among them, in calculating the target discharge power of each optional battery corresponding to the target UPS host according to the target rated peak power and the number of battery cells of the optional battery, the calculation can be performed according to a preset formula, which is:

[0091] W = target rated peak power * Φ / η / N,

[0092] Where W is the battery cell discharge power, Φ is the power factor, η is the inverter efficiency, and N is the number of battery cells.

[0093] In one embodiment, according to the actual load, Φ can be taken as 1; since η is related to the load rate, it is taken as 0.9 in this embodiment; according to the position matching of the energy storage electrical compartment, this embodiment can be set as two battery packs, a single battery pack has 8 battery cells in series, 2 channels are connected in parallel (2P8S), and there are 8 battery cells inside the UPS host, so the final N=8+2*16=40 battery cells (5P8S).

[0094] Among them, in determining the discharge time at the target discharge power according to the target discharge power and the nominal voltage of the alternative battery, the target discharge power and the nominal voltage can be used as query identifiers to query in the preset discharge power time table to obtain the discharge time corresponding to the target discharge power at the nominal voltage. The preset discharge power time table is used to represent the mapping relationship between the target discharge power, the nominal voltage and the discharge time.

[0095] The preset discharge power schedule is a pre-established database or table, which records the discharge durations under different combinations of target discharge power and nominal voltage.

[0096] The nominal voltage refers to the ideal, standard voltage value designed for batteries or electrical equipment under normal operating conditions and marked on the specification sheet or product label. This voltage value is given by the manufacturer based on the product design and expected use conditions to guide consumers or system designers to correctly use and configure electronic devices or batteries. The nominal voltage of a single-cell lead-acid battery is 2.0V, which can be discharged to 1.5V and charged to 2.4V. In applications, 6 single-cell lead-acid batteries are often connected in series to form a nominal 12V lead-acid battery cell, as well as 24V, 36V, 48V, etc.

[0097] The above discharge time indicates the time that the alternative battery can continuously supply power in the absence of an external power supply.

[0098] The battery model is matched according to the calculated discharge time and target discharge power. The battery parameters corresponding to the selected target candidate battery model should be consistent with the calculated discharge time and target discharge power to ensure that the battery pack can meet the energy requirements of the UPS system during power outages.

[0099] It can be seen that this embodiment ensures that the UPS subsystem can not only work stably when the power grid is normally powered, but also provide sufficient backup power when the power grid is interrupted, supporting the continuous operation of key equipment until power is restored or there is enough time to safely shut down the equipment. Further selection of an appropriate UPS host and backup battery takes into account the nature of the load (such as whether it contains a large number of inductive or capacitive loads), rated power, and operating environment conditions (such as temperature, humidity, etc.) to ensure the stability and efficiency of the system.

[0100] In one embodiment, the discharge time at the target discharge power is determined according to the target discharge power and the nominal voltage of the alternative battery, including: according to the target discharge power, the nominal voltage and a preset discharge power schedule, the discharge time corresponding to the target discharge power at the nominal voltage is obtained, and the preset discharge power schedule is used to represent the mapping relationship between the target discharge power, the nominal voltage and the discharge time.

[0101] Among them, in the specific process of obtaining the discharge time corresponding to the target discharge power under the nominal voltage according to the target discharge power, the nominal voltage and the preset discharge power time table, the target discharge power and the nominal voltage can be set as query identifiers, and a query is performed in the preset discharge power time table to obtain the discharge time corresponding to the target discharge power under the nominal voltage. The preset discharge power time table is used to represent the mapping relationship between the target discharge power, the nominal voltage and the discharge time.

[0102] The preset discharge power schedule is a pre-established database or table that records the discharge duration under different target discharge power and nominal voltage combinations. The data in the table is usually provided by battery manufacturers or professional testing organizations, reflecting the comprehensive parameters of battery discharge performance.

[0103] For example, suppose an electrical device requires a target discharge power of 200 W and the nominal voltage of the battery pack is 12 V. In the preset discharge power schedule, find the row with a nominal voltage of 12 V and a discharge power of 200 W. The value corresponding to this row is the expected discharge time of the battery under this working condition.

[0104] It can be seen that in this embodiment, the best battery configuration is found through this method to ensure that the battery can continue to provide sufficient power during the backup power period required by the entire UPS subsystem. At the same time, the appropriate type and number of batteries can be selected according to the discharge time requirements to ensure the stability and economy of the UPS subsystem, ensure that the UPS system can provide sufficient backup power when the power is interrupted, and optimize the efficiency and cost-effectiveness of the entire system.

[0105] In one embodiment, the method further includes: testing the target UPS host and the target candidate battery corresponding to the target UPS host to obtain a performance evaluation result of the target UPS host.

[0106] Among them, the purpose of testing the target UPS host and the target alternative battery corresponding to the target UPS host is to obtain the performance of the target UPS host and its alternative battery under different environmental conditions and loads. This is used to evaluate whether the UPS subsystem can meet specific requirements, such as providing sufficient backup power during power outages. By systematically testing and recording the results, it can be ensured that the performance of the UPS subsystem in actual applications meets the expected standards and provides stable power support for key equipment and operations. In addition, the performance evaluation results obtained from the test can also reveal potential performance bottlenecks or design defects of the UPS subsystem, providing manufacturers or system designers with a basis for improving or adjusting products.

[0107] Optionally, when testing the target UPS host and the target alternative battery corresponding to the target UPS host to obtain the performance evaluation result of the target UPS host, a discharge test is performed on the target UPS host and the target alternative battery corresponding to the target UPS host under a preset test environment; when either the target UPS host or the target UPS host reaches the discharge test termination condition, the current test discharge duration is obtained; and based on the test discharge duration, the performance evaluation result of the target UPS host is determined.

[0108] Optionally, in determining the performance evaluation result of the target UPS host based on the test discharge time, determine whether the test discharge time is greater than the discharge time at the target discharge power; if the test discharge time is greater than or equal to the discharge time at the target discharge power, determine that the target UPS host meets the selection requirements; if the test discharge time is less than the discharge time at the target discharge power, determine that the target UPS host does not meet the selection requirements.

[0109] The above-mentioned discharge test termination condition refers to that the target UPS host and the target backup battery are discharged at the same time. When the power of either the target UPS host or the power of the target backup battery is 0, the discharge test termination condition is reached.

[0110] The above performance evaluation result may be whether the UPS host meets the selection requirements, or the host status after the test is completed, etc., which is not limited here.

[0111] The preset test environment may include but is not limited to environmental factors such as altitude, temperature, and relative humidity.

[0112] For example, at an altitude of 5000 meters (test air pressure value 54kpa), 25℃±2, and relative humidity ≤80%, the target UPS host A and the target alternative battery B corresponding to the target UPS host are tested. At the beginning of the test, the host A and the alternative battery B are fully charged; after a period of monitoring, it is found that the power of A is 0, and B is not 0. At this time, when the discharge test termination condition is met, the current test discharge time is obtained as 2 hours; assuming that the discharge time at the target discharge power is 1.5 hours, since the actual measured test discharge time is 2 hours, which exceeds the theoretical expectation, it can be obtained that A meets the selection requirements.

[0113] It can be seen that in this embodiment, the reliability of the UPS host and the optional battery under various working conditions is further verified through testing to ensure that they can stably provide power support in actual applications. In addition, during the testing process, potential problems of the UPS host or the optional battery may be discovered, and potential problems can be discovered and solved in time to avoid the risk of failure.

[0114] In one embodiment, the method further includes: acquiring a battery health status corresponding to the target candidate battery in real time; and providing a prompt according to the health status of the target candidate battery.

[0115] The energy storage system also includes a three-level battery management module. When prompting the health status of the target candidate battery, the battery health status is transmitted to the three-level battery management module to prompt the health status of the target candidate battery. The three-level battery management module is responsible for collecting and analyzing battery status data, including voltage, current, temperature, charge and discharge status, etc., as well as the health status of the battery.

[0116] A communication connection is established between the UPS subsystem and the three-level battery management module to exchange data and information in real time. This connection can be a physical connection (such as a cable) or a network connection (such as Ethernet). In one embodiment, the UPS subsystem and the three-level battery management module can communicate via RS485.

[0117] After determining the target UPS host and its corresponding target backup battery, the UPS subsystem will monitor the health status of the backup battery in real time, including key parameters such as battery charge and discharge efficiency, capacity attenuation, internal temperature and voltage.

[0118] Among them, the process of obtaining the battery health status corresponding to the target candidate battery in real time is as follows: establish a communication connection between the UPS subsystem and the three-level battery management module, and configure the same communication protocol and parameters on the UPS subsystem and the three-level battery management module, such as the baud rate, data bit, stop bit and check bit of RS485; next, the battery management module or similar module in the UPS subsystem monitors various parameters of the target candidate battery in real time, including but not limited to voltage, current, temperature, state of charge (SOC), state of health (SOH), etc.; then, the battery management unit collects the battery health status data at a preset time interval (for example, every second or every minute); finally, the collected battery health status data is transmitted to the three-level battery management module in real time through the established communication connection.

[0119] The real-time battery health status will be transmitted to the third-level battery management module, which will analyze and evaluate the battery status in real time and provide prompts to the UPS subsystem or operator when necessary. These prompts may include that the battery is about to reach the end of its service life, needs to be replaced or maintained, etc.

[0120] It can be seen that in this embodiment, by monitoring the battery health status corresponding to the target backup battery, it is possible to ensure timely response to battery health issues and take corresponding measures, thereby ensuring that the UPS subsystem and its backup batteries can operate stably for a long time and improve the overall stability and safety of the system.

[0121] It should be noted that, in each of the above-mentioned embodiments, there is not necessarily a certain order between the above-mentioned steps. A person skilled in the art can understand, based on the description of the embodiments of the present application, that in different embodiments, the above-mentioned steps may have different execution orders, that is, they may be executed in parallel, may be executed interchangeably, and so on.

[0122] As another aspect of the embodiment of the present application, the embodiment of the present application provides a UPS configuration device, wherein the UPS configuration device can be a software module, the software module includes a number of instructions, which are stored in a memory, and the processor can access the memory and call the instructions for execution to complete the UPS configuration method described in each of the above embodiments.

[0123] See also Figure 3 , Figure 3 Schematic diagram of a UPS configuration device provided in an embodiment of the present application. Applied to an energy storage system, the energy storage system includes a UPS subsystem, such as Figure 3 As shown, the UPS configuration device 300 includes:

[0124] An acquisition unit 301 is used to determine a first rated peak power according to the load power of each load unit in the energy storage system;

[0125] A determining unit 302, configured to determine a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem;

[0126] The determining unit 302 is further configured to determine a target UPS host in the UPS subsystem according to the target rated peak power.

[0127] This embodiment can accurately evaluate and determine the first rated peak power of the UPS host in the UPS subsystem according to the load power of each load unit in the energy storage system, so that the UPS subsystem can more accurately match the actual needs of the energy storage system, avoiding the problem of excess or insufficient performance caused by improper selection. Further considering the combined evaluation of the first rated peak power and the overload parameter, it can ensure the stable operation of the UPS subsystem under extreme or unstable conditions, thereby ensuring the stable operation of the energy storage system.

[0128] In one embodiment, in determining the first rated peak power according to the load power of each load unit in the energy storage system, the determination unit 302 is further used to: determine the second rated peak power according to the load power of each load unit; determine the first rated peak power according to a preset altitude rule and the second rated peak power, wherein the first rated peak power and the second rated peak power represent rated peak powers corresponding to different altitudes, and the altitude corresponding to the first rated peak power is greater than the altitude corresponding to the second rated peak power.

[0129] In one embodiment, in determining the target rated peak power based on the first rated peak power and the overload parameters of the UPS subsystem, the determination unit 302 is also used to: determine the target overload power coefficient corresponding to the overload parameters of the UPS subsystem based on the overload parameters of the UPS subsystem and the mapping relationship between the preset overload parameters and the overload power coefficient; and obtain the target rated peak power based on the target power coefficient and the first rated peak power.

[0130] In one embodiment, in determining a target UPS host in a UPS subsystem according to a target rated peak power, the determination unit 302 is further used to: match a UPS host model according to the target rated peak power to obtain a target UPS host, wherein the power corresponding to the UPS host model of the target UPS host is greater than or equal to the target rated peak power.

[0131] In one embodiment, after determining the target UPS host in the UPS subsystem according to the target rated peak power, the determination unit 302 is further used to: determine the target discharge power of each alternative battery corresponding to the target UPS host according to the target rated peak power and the number of battery cells of the alternative battery; determine the discharge time at the target discharge power according to the target discharge power and the nominal voltage of the alternative battery; match the battery model according to the discharge time and the target discharge power, and determine the target alternative battery corresponding to the target UPS host, and the battery parameters corresponding to the battery model of the target alternative battery are consistent with the discharge time and the target discharge power.

[0132] In one embodiment, in determining the discharge time at the target discharge power according to the target discharge power and the nominal voltage of the alternative battery, the determination unit 302 is further used to: obtain the discharge time corresponding to the target discharge power at the nominal voltage according to the target discharge power, the nominal voltage and the preset discharge power schedule, and the preset discharge power schedule is used to represent the mapping relationship between the target discharge power, the nominal voltage and the discharge time.

[0133] In one embodiment, the UPS configuration device 300 further includes a testing unit 303, and the testing unit 303 is used to test the target UPS host and the target candidate battery corresponding to the target UPS host to obtain a performance evaluation result of the target UPS host.

[0134] In one embodiment, a target UPS host in the UPS subsystem is determined, and the determination unit 302 is further used to: obtain the battery health status corresponding to the target candidate battery in real time; and provide a prompt according to the health status of the target candidate battery.

[0135] It should be noted that the above UPS configuration device can execute the UPS configuration method provided in the implementation mode of this application, and has the corresponding functional modules and beneficial effects of the execution method. For technical details not fully described in the UPS selection and configuration implementation mode, please refer to the UPS configuration method provided in the implementation mode of this application.

[0136] See also Figure 4 , Figure 4 Schematic diagram of the structure of an energy storage system provided in an embodiment of the present application. Figure 4 As shown, the energy storage system 400 includes a processor 401 and a memory 402. The processor 401 is in communication connection with the memory 402.

[0137] The processor 401 is configured to support the energy storage system to perform the corresponding functions in the UPS configuration method in the above method embodiment. The processor 401 can be a central processing unit (CPU), a network processor (NP), a hardware chip or any combination thereof. The above hardware chip can be an application specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0138] Specifically, the processor 401 may include a sending card, a receiving card and a driving chip.

[0139] The memory 402 is used to store program codes, etc. The memory 402 may include a volatile memory (VM), such as a random access memory (RAM); the memory 402 may also include a non-volatile memory (NVM), such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); the memory 402 may also include a combination of the above-mentioned types of memories.

[0140] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a computer, the computer executes the UPS configuration method as described in the foregoing embodiment.

[0141] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0142] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A UPS configuration method, applied to an energy storage system, wherein the energy storage system includes a UPS subsystem, characterized in that: The method comprises: Determining a first rated peak power according to the load power of each load unit in the energy storage system; Determining a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem; A target UPS host in the UPS subsystem is determined according to the target rated peak power.

2. The UPS configuration method according to claim 1, characterized in that: The determining of the first rated peak power according to the load power of each load unit in the energy storage system includes: Determining a second rated peak power according to the load power of each of the load units; The first rated peak power is determined according to a preset altitude rule and the second rated peak power, wherein the first rated peak power and the second rated peak power represent rated peak powers corresponding to different altitudes, and the altitude corresponding to the first rated peak power is greater than the altitude corresponding to the second rated peak power.

3. The UPS configuration method according to claim 1, characterized in that: The determining the target rated peak power according to the first rated peak power and the overload parameter of the UPS subsystem includes: Determining a target overload power factor corresponding to the overload parameter of the UPS subsystem according to the overload parameter of the UPS subsystem and a mapping relationship between the preset overload parameter and the overload power factor; The target rated peak power is acquired according to the target power factor and the first rated peak power.

4. The UPS configuration method according to claim 1, characterized in that: Determining a target UPS host in the UPS subsystem according to the target rated peak power includes: A UPS host model is matched according to the target rated peak power to obtain a target UPS host, wherein the power corresponding to the UPS host model of the target UPS host is greater than or equal to the target rated peak power.

5. The UPS configuration method according to claim 1, characterized in that: After determining the target UPS host in the UPS subsystem according to the target rated peak power, the method further includes: Determine the target discharge power of each optional battery corresponding to the target UPS host according to the target rated peak power and the number of battery cells of the optional battery; Determining a discharge duration at the target discharge power according to the target discharge power and the nominal voltage of the candidate battery; The battery model is matched according to the discharge time and the target discharge power to determine the target backup battery corresponding to the target UPS host, and the battery parameters corresponding to the battery model of the target backup battery are consistent with the discharge time and the target discharge power.

6. The UPS configuration method according to claim 5, characterized in that: The step of determining the discharge duration at the target discharge power according to the target discharge power and the nominal voltage of the candidate battery includes: According to the target discharge power, the nominal voltage and a preset discharge power schedule, a discharge duration corresponding to the target discharge power under the nominal voltage is obtained, and the preset discharge power schedule is used to represent a mapping relationship between the target discharge power, the nominal voltage and the discharge duration.

7. The UPS configuration method according to claim 5, characterized in that: The method further comprises: The target UPS host and the target candidate battery corresponding to the target UPS host are tested to obtain a performance evaluation result of the target UPS host.

8. The UPS configuration method according to claim 5, characterized in that: The method further comprises: Obtaining the battery health status corresponding to the target candidate battery in real time; Prompt according to the health status of the target candidate battery.

9. A UPS configuration device, applied to an energy storage system, the energy storage system including a UPS subsystem, the device comprising: An acquisition unit, configured to determine a first rated peak power according to a load power of each load unit in the energy storage system; a determining unit, configured to determine a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem; The determining unit is further configured to determine a target UPS host in the UPS subsystem according to the target rated peak power.

10. An energy storage system, characterized in that: The system comprises a UPS subsystem and a container battery subsystem, and the system comprises: The container battery subsystem is used to obtain the load power of each load unit in the energy storage system and transmit it to the UPS subsystem; The UPS subsystem is used to determine a first rated peak power according to the load power of each load unit in the energy storage system; it is also used to determine a target rated peak power according to the first rated peak power and an overload parameter of the UPS subsystem; it is also used to determine a target UPS host in the UPS subsystem according to the target rated peak power.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program includes program instructions, and when the program instructions are executed by a processor, the processor executes the UPS configuration method according to any one of claims 1 to 8.

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