Energy storage system construction methods, systems, devices, equipment, media and products

Abstract

The present application discloses a method, system, device, equipment, medium and product for constructing an energy storage system, which relates to the field of battery preparation. The method includes: obtaining a cell voltage and at least two system upper limit voltages; determining the number of cells corresponding to the at least two system upper limit voltages based on the cell voltage to obtain at least two cell numbers; determining a common factor of the at least two cell numbers, and determining a first cell number of battery cells used to construct a battery box based on the common factor; determining the number of battery boxes of the battery box based on the first cell number, and constructing an energy storage system according to the number of battery boxes. By constructing an energy storage system with battery boxes having the number of battery boxes obtained by analyzing at least two system upper limit voltages, it is only necessary to adopt different connection methods for the battery boxes to enable the energy storage system to support different system upper limit voltages, thereby enhancing the pertinence and compatibility of the system construction process. The present application can be applied to a variety of battery preparation scenarios.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery preparation, and in particular to a method, system, device, equipment, medium and product for constructing an energy storage system. Background Art

[0002] With the development of computer technology, energy storage systems have played a huge role in many fields, and energy storage systems are relied upon to provide electrical energy in various scenarios.

[0003] In related technologies, after an energy storage system is constructed, it is usually used to provide power support for terminals, automobiles and other equipment within the range of a preset voltage upper limit of the energy storage system.

[0004] Although the preset pressure limit ensures the safety of the energy storage system during operation, the preset pressure is fixed after the energy storage system is built and cannot flexibly adapt to changes in voltage upgrades, which restricts the application scenarios of the energy storage system. Summary of the Invention

[0005] The present invention provides a method, system, device, equipment, medium, and product for constructing an energy storage system. The method utilizes battery boxes whose number is determined by analyzing at least two upper system voltage limits. This allows the energy storage system to support different upper system voltage limits simply by connecting the battery boxes in different ways, thereby enhancing the targetedness and compatibility of the system construction process. The technical solution is as follows.

[0006] In one aspect, a method for constructing an energy storage system is provided, the method comprising:

[0007] Obtaining a cell voltage and at least two system upper limit voltages, where the at least two system upper limit voltages are at least two preset voltage upper limits compatible with the energy storage system, and the cell voltage is the voltage of a battery cell used to construct the energy storage system;

[0008] Determine, based on the cell voltage, the number of cells corresponding to the at least two system upper limit voltages, respectively, to obtain at least two numbers of cells, wherein the i-th system upper limit voltage corresponds to the i-th number of cells, and i is a positive integer;

[0009] determining a common factor of the at least two battery cell quantities, and determining a first battery cell quantity of the battery cells for constructing a battery box based on the common factor;

[0010] The number of battery boxes of the battery box is determined based on the first number of battery cells, and the energy storage system is constructed according to the number of battery boxes, wherein the energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection modes.

[0011] In another aspect, an energy storage system is provided, comprising:

[0012] A battery box corresponding to a number of battery boxes; wherein one battery box is constructed from a first number of battery cells, the first number of battery cells is determined based on a common factor of at least two numbers of battery cells, the at least two numbers of battery cells are obtained based on the cell voltages of the battery cells and at least two system upper limit voltages, the i-th system upper limit voltage corresponds to the i-th number of battery cells, and i is a positive integer;

[0013] Among them, the at least two system upper limit voltages are at least two preset voltage upper limits compatible with the energy storage system, and the cell voltage is the voltage of the battery cell used to construct the energy storage system; the energy storage system supports different system upper limit voltages when the battery boxes of the number of battery boxes are connected in different connection methods.

[0014] In another aspect, a device for constructing an energy storage system is provided, the device comprising:

[0015] an acquisition module, configured to acquire a cell voltage and at least two system upper limit voltages, wherein the at least two system upper limit voltages are at least two preset voltage upper limits compatible with the energy storage system, and the cell voltage is the voltage of a battery cell used to construct the energy storage system;

[0016] The acquisition module is further configured to determine, based on the cell voltage, the number of cells corresponding to the at least two system upper limit voltages, respectively, to obtain at least two cell quantities, wherein the i-th system upper limit voltage corresponds to the i-th cell quantity, and i is a positive integer;

[0017] a determination module, configured to determine a common factor of the at least two battery cell quantities, and determine a first battery cell quantity of the battery cells used to construct a battery box based on the common factor;

[0018] A construction module is used to determine the number of battery boxes of the battery box based on the first number of battery cells, and to construct the energy storage system according to the number of battery boxes, wherein the energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection methods.

[0019] In another aspect, a computer device is provided, comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set, or an instruction set, and wherein the at least one instruction, at least one program, or the code set or instruction set is loaded and executed by the processor to implement the energy storage system construction method described in any of the above embodiments of the present application. Optionally, the computer device may be a terminal or a server.

[0020] On the other hand, a computer-readable storage medium is provided, wherein the storage medium stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement a method for constructing an energy storage system as described in any of the above embodiments of the present application.

[0021] In another aspect, a computer program product or computer program is provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the method for constructing an energy storage system described in any of the above embodiments.

[0022] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0023] In the process of constructing an energy storage system, the number of battery cells corresponding to at least two system upper limit voltages preset for the energy storage system is determined based on the cell voltage of the battery cells used, thereby determining the first number of battery cells of the battery cells used based on the common factor of the at least two numbers of battery cells, and then constructing the energy storage system by using battery boxes that meet the number of battery boxes determined by the first number of battery cells. By comprehensively considering at least two system upper limit voltages before constructing the energy storage system, the number of battery boxes that can simultaneously meet at least two system upper limit voltages is obtained, thereby constructing an energy storage system that can be used in at least two system upper limit voltage scenarios with the number of battery boxes. It is only necessary to use different connection methods for the battery boxes to enable the energy storage system to support different system upper limit voltages, thereby enhancing the pertinence and compatibility of the system construction process, avoiding the problem that the energy storage system can only be applied to a single voltage scenario, and facilitating rapid scenario switching of the constructed energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural block diagram of a construction system provided by an exemplary embodiment of the present application;

[0025] Figure 2 is a flow chart of a method for constructing an energy storage system provided by an exemplary embodiment of the present application;

[0026] Figure 3 is a flow chart of a method for constructing an energy storage system provided by another exemplary embodiment of the present application;

[0027] Figure 4 is a flow chart of a method for constructing an energy storage system provided by another exemplary embodiment of the present application;

[0028] Figure 5This is a schematic diagram of a battery box connection condition of an energy storage system supporting a first system upper limit voltage provided by an exemplary embodiment of the present application;

[0029] Figure 6 This is a schematic diagram of a battery box connection condition of an energy storage system supporting a second system upper limit voltage provided by an exemplary embodiment of the present application;

[0030] Figure 7 is a schematic diagram of determining the number of modules provided by an exemplary embodiment of the present application;

[0031] Figure 8 This is a schematic diagram of constructing an energy storage system based on a construction method of an energy storage system provided by an exemplary embodiment of the present application;

[0032] Figure 9 It is a front view of an energy storage system constructed by using a first battery box with the number of battery boxes under the constraint of size data provided by an exemplary embodiment of the present application;

[0033] Figure 10 It is a top view of an energy storage system constructed by using a first battery box of the number of battery boxes under the constraint of size data provided by an exemplary embodiment of the present application;

[0034] Figure 11 is a schematic diagram of an arrangement of battery cells to an energy storage system provided by an exemplary embodiment of the present application;

[0035] Figure 12 is a structural block diagram of a construction device for an energy storage system provided by another exemplary embodiment of the present application;

[0036] Figure 13 This is a structural block diagram of a server provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0038] First, a brief introduction is given to the terms involved in the embodiments of this application.

[0039] Energy Storage System (ESS): An ESS is a system used to store and release electrical energy, typically consisting of batteries, control systems, inverters, and other related components. ESS can store electricity, balance power supply and demand, provide backup power, and support grid stability.

[0040] The Battery Management System (BMS) is a core component responsible for managing the energy storage system. It manages the charge and discharge processes, temperature, capacity, and other conditions of the battery box or battery module, ensuring safe and efficient operation of the energy storage system. A battery management system typically has a multi-layer architecture. For example, in a large-scale power storage system (an energy storage system that stores electrical energy on a large scale and supports grid operation), the third-level Battery Management Unit (BMU) is located inside the battery box, the second-level BMS is located in the mailbox (cabinet), and the first-level Battery Aggregator (BA) is often placed in the combiner cabinet.

[0041] In the embodiments of the present application, the construction method of the energy storage system introduced can be applied to multiple application scenarios such as the field of energy storage system development, technology research and development, home energy management, commercial energy storage, industrial energy storage, power regulation, transportation, infrastructure, etc., which are not limited here. It should be noted that the information involved in this application (including but not limited to user device information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data need to comply with the relevant laws, regulations and standards of the relevant regions. For example, the system upper limit voltage, battery cell voltage and other contents involved in this application are all obtained with full authorization.

[0042] The construction system involved in the embodiments of the present application is described. The construction method of the energy storage system provided in the embodiments of the present application can be implemented by a terminal alone, by a server, or by a terminal and a server through data interaction, and the embodiments of the present application are not limited to this. Optionally, the construction method of the energy storage system executed interactively by a terminal and a server is used as an example for description.

[0043] For illustration, please refer to Figure 1 The construction system involves a terminal 110 and a server 120 , and the terminal 110 and the server 120 are connected via a communication network 130 .

[0044] In some embodiments, the terminal 110 is installed with a system design application. When the system design application is run, multiple voltage filling boxes are displayed. By filling in corresponding values ​​in the voltage filling boxes, the system upper limit voltage and battery cell voltage considered when building the energy storage system are determined.

[0045] Optionally, the terminal 110 receives a numerical filling operation for the system upper limit voltage and the cell voltage during the process of displaying the voltage filling box to obtain the cell voltage and at least two system upper limit voltages. Among them, the at least two system upper limit voltages are at least two voltage upper limits compatible with the preset energy storage system, and the cell voltage is the voltage of the battery cell used to construct the energy storage system. In an illustrative embodiment, it is hoped that the constructed energy storage system can be compatible with at least two voltage upper limits so that the constructed energy storage system can adapt to different system upper limit voltages through rapid line adjustment while keeping the components unchanged. For example: multiple voltage filling boxes include at least two system upper limit voltage filling columns, based on the numerical filling operation for the at least two system upper limit voltage filling columns, it is determined that the filled values ​​include 1500V and 2000V, then the two system upper limit voltages are obtained; in addition, multiple voltage filling boxes include a cell voltage filling column, based on the numerical filling operation for the cell voltage filling column, it is determined that the filled value is 3.65V, then the cell voltage is obtained.

[0046] In some embodiments, the number of cells corresponding to at least two system upper limit voltages is determined based on the cell voltages to obtain at least two cell numbers. The i-th system upper limit voltage corresponds to the i-th cell number, where i is a positive integer. Illustratively, the i-th system upper limit voltage is any one of the at least two system upper limit voltages; based on the i-th system upper limit voltage and the cell voltage, the number of cells corresponding to the i-th system upper limit voltage, i.e., the i-th cell number, is determined; and based on this method, the cell numbers corresponding to the at least two system upper limit voltages are obtained.

[0047] In some embodiments, a common factor of at least two numbers of battery cells is determined, and a first number of battery cells used to construct a battery box is determined based on the common factor. Illustratively, after obtaining the at least two numbers of battery cells, the common factor of the at least two numbers of battery cells is analyzed, i.e., at least one value that is divisible by the at least two numbers of battery cells is determined; then, in the process of constructing a battery box using the battery cells, the number of battery cells used to construct the battery box is determined based on the common factor, i.e., the first number of battery cells is determined. For example, if the common factor of the at least two numbers of battery cells is 17, and 17 battery cells are used to form a battery box, then the first number of battery cells is 17; or, if the common factor of the at least two numbers of battery cells is 17, an integer multiple of 17, 68, is obtained, and 68 battery cells are used to form a battery box, etc., then the first number of battery cells is 68, etc., and this is not limited here.

[0048] In some embodiments, the number of battery boxes in a battery box is determined based on a first number of battery cells, and the energy storage system is constructed according to the number of battery boxes. Illustratively, a battery box can be constructed using the first number of battery cells. The first number of battery cells and the number of at least two battery cells are combined to determine the number of battery boxes in the energy storage system that supports at least two system upper limit voltages, thereby constructing the energy storage system using the battery boxes of the same number of battery boxes. The energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection methods. For example: when supporting one system upper limit voltage, while keeping the number of battery boxes in the energy storage system unchanged, multiple battery boxes are connected in one connection method based on the voltage supported by each battery box, so that the energy storage system supports the system upper limit voltage; when supporting another system upper limit voltage, while keeping the number of battery boxes in the energy storage system unchanged, multiple battery boxes are connected in another connection method based on the voltage supported by each battery box, so that the energy storage system supports the system upper limit voltage, etc. For example: based on the principle of adding series voltages and equal parallel voltages, by adjusting the series and parallel connection of the battery boxes, the purpose of supporting different system upper limit voltages in different connection methods can be achieved while keeping the number of battery boxes unchanged.

[0049] In some embodiments, the terminal 110 transmits the acquired cell voltages and at least two system upper limit voltages to the server 120 via the communication network 130, so that the server 120 determines the number of cells corresponding to the at least two system upper limit voltages based on the cell voltages, determines a first number of battery cells for constructing the battery box, and determines the number of battery boxes in the battery box based on the first number of cells. The server 120 may transmit the number of battery boxes to the terminal 110 via the communication network 130, so that the terminal 110 constructs the energy storage system according to the number of battery boxes. For example, the terminal 110 renders a schematic diagram of the energy storage system in which the battery boxes are not linked within an interface corresponding to a system design application based on the number of battery boxes. If a system upper limit voltage is then selected from the at least two system upper limit voltages, multiple battery boxes in the energy storage system are connected in a certain connection method based on the system upper limit voltage, thereby facilitating the system designer's understanding of the preliminary architectural design of the energy storage system. Similarly, if another system upper limit voltage is selected, multiple battery boxes in the energy storage system are connected in another connection method based on the system upper limit voltage, etc., without limitation herein. The above-mentioned terminals include but are not limited to mobile terminals such as mobile phones, tablet computers, portable laptops, intelligent voice interaction devices, smart home appliances, etc., and can also be implemented as desktop computers, etc.; the above-mentioned servers can be independent physical servers, or server clusters or distributed systems composed of multiple physical servers, or cloud servers.

[0050] Combined with the above-mentioned noun introduction and application scenarios, the construction method of the energy storage system provided by this application is described, and the application of this method to the terminal is used as an example. Figure 2 As shown, the method includes the following steps 210 to 240.

[0051] Step 210: Obtain the cell voltage and at least two system upper limit voltages.

[0052] Optionally, the cell voltage and at least two system upper limit voltages are predetermined values ​​before constructing the energy storage system, wherein the cell voltage is the upper limit voltage of the battery cell used to construct the energy storage system. The upper limit voltage represents the maximum voltage that the battery cell can withstand during charging. The upper limit voltage of the battery cell is usually related to the material type of the battery cell; for example: lithium iron phosphate battery ( ) is usually 3.65V, the upper limit voltage of lithium-ion batteries is usually 4.2V, the upper limit voltage of lead-acid batteries is usually 2.4V, etc., which are not limited here. Optionally, the cell voltage is the safe voltage of the battery cell used to construct the energy storage system. The safe voltage is usually used to characterize the voltage range in which the battery cell can safely operate during charging or discharging. The safe voltage represents a preset value or an arbitrary value within the voltage range indicated by the safe voltage. For example, the charging safety voltage range of a lithium battery is generally between 3.0V and 4.2V, while the discharge safety range may be 3.0V to 3.7V. The safe voltage is selected as 3.6V (at the same time within the charging safety voltage range and the discharge safety voltage range), etc., which are not limited here. Among them, at least two system upper limit voltages are at least two voltage upper limits compatible with the preset energy storage system. The upper limit voltage is used to characterize the maximum voltage supported by the energy storage system during operation. The upper limit voltage is usually set under the control of the battery management system as the upper limit of the safe operation of the energy storage system during charging. Schematically, at least two system voltages are system upper limit voltages of different values, such as one system upper limit voltage of 1500V and another system upper limit voltage of 2000V; or, one system upper limit voltage of 1800V, another system upper limit voltage of 2000V, and another system upper limit voltage of 2500V, etc., which are not limited here. The purpose of setting at least two system voltages is to enable the constructed energy storage system to efficiently switch to different operating states to support different system upper limit voltages during subsequent use; for example: it can support a system upper limit voltage of 1500V in one operating state and a system upper limit voltage of 2000V in another operating state, etc., which helps to enable the constructed energy storage system to support more application scenarios of system upper limit voltages.

[0053] In some embodiments, the cell voltage and at least two system upper limit voltages are values ​​filled in by system developers to guide the energy storage system construction process. Optionally, during the energy storage system construction process, the system architecture of the energy storage system is determined with the assistance of a terminal. The terminal is installed with a system design application. When the system design application is run, multiple voltage fill-in boxes are displayed. By filling in corresponding values ​​in the voltage fill-in boxes, the system upper limit voltage and cell voltage considered in the energy storage system construction are determined.

[0054] Step 220 : Determine the number of battery cells corresponding to at least two system upper limit voltages based on the battery cell voltages, and obtain at least two numbers of battery cells.

[0055] Among them, the i-th system upper limit voltage corresponds to the i-th number of battery cells, and i is a positive integer. Schematically, the i-th system upper limit voltage is any one of the at least two system upper limit voltages; taking the i-th system upper limit voltage as an example, based on the i-th system upper limit voltage and the battery cell voltage, the number of battery cells corresponding to the i-th system upper limit voltage is determined as the i-th number of battery cells; similarly, the number of battery cells corresponding to at least two system upper limit voltages is determined. Optionally, since the i-th system upper limit voltage represents the maximum supported voltage upper limit, and the battery cell voltage is the voltage of the battery cell used when constructing the energy storage system, the quotient of the i-th system upper limit voltage and the battery cell voltage is taken as the i-th number of battery cells of the i-th system upper limit voltage. For example: If the i-th system upper limit voltage is 1500V and the cell voltage is 3.65V, the quotient is approximately 547.9. To ensure the voltage safety of the energy storage system, a positive integer less than 547.9 is selected as the i-th cell number, such as 546 for the i-th cell number, or 544 for the i-th cell number, etc., which are not limited here. The i-th system upper limit voltage corresponds to the i-th cell number, which means that at least the i-th cell number of battery cells is required to build an energy storage system that supports the i-th system upper limit voltage. For example: If the i-th system upper limit voltage is 1500V and the i-th cell number is 546, then at least 546 battery cells are required to build an energy storage system that supports 1500V, etc., which are not limited here.

[0056] Step 230 : determining a common factor of at least two battery cell quantities, and determining a first battery cell quantity for constructing the battery box based on the common factor.

[0057] Illustratively, after analyzing and obtaining the number of cells corresponding to at least two system upper limit voltages, the common factors of the at least two numbers of cells are analyzed with the at least two numbers of cells as the analysis objects. Optionally, for any i-th number of cells among the at least two numbers of cells, the prime factors of the i-th number of cells are determined; the prime factors corresponding to the at least two numbers of cells are determined, and the largest common prime factor is determined from the prime factors corresponding to the at least two numbers of cells. Wherein, the prime factor is a prime number that can divide the i-th number of cells. A prime number is a number greater than 1 and can only be divided by 1 and itself, such as 2, 3, 5, 7, etc. For example: the prime factors of the number of cells 544 include 2, 2, 2, 2, and 17; the prime factors of the number of cells 408 include 2, 2, 2, 3, and 17, then the common prime factors include 2 and 17, and the largest common prime factor is 17. Optionally, for any i-th number of battery cells among the at least two numbers of battery cells, factors of the i-th number of battery cells are determined; factors corresponding to the at least two numbers of battery cells are determined, and the largest common factor is determined from the factors corresponding to the at least two numbers of battery cells. Factors are numbers that can divide the i-th number of battery cells, so factors include not only prime factors but also factors other than prime numbers. For example, the prime factors of 12 are 2, 2, and 3, but the factors of 18 include not only 2 and 3, but also 1, 4, 6, and 12, which are not described here.

[0058] In some embodiments, a battery box is constructed using multiple battery cells. After determining a common factor between at least two numbers of cells, a first number of battery cells for constructing the battery box is determined based on the common factor, and the first number of battery cells represents the number of battery cells in the battery box. Optionally, the common factor is used as the first number of battery cells for constructing the battery box. Schematically, the common factor is 17. If the common factor is used as the first number of cells, it means that one battery box is constructed from 17 battery cells. Optionally, a preset multiple of the common factor is used as the first number of battery cells for constructing the battery box. Schematically, the common factor is 17, and the preset multiple is 4. If the preset multiple of the common factor is used as the first number of cells, it means that one battery box is constructed from 68 battery cells, etc.

[0059] Step 240 : determining the number of battery boxes in the battery box based on the first number of battery cells, and constructing the energy storage system according to the number of battery boxes.

[0060] Optionally, after analyzing and determining a first number of battery cells used in constructing a single battery box, based on at least two system upper limit voltages each corresponding to a number of battery cells, the minimum number of battery boxes required to construct an energy storage system that supports the system upper limit voltage can be determined based on the first number of battery cells and the number of battery cells corresponding to the system upper limit voltage. Optionally, the quotient of the number of battery cells corresponding to the system upper limit voltage and the first number of battery cells is used as the system battery box number of battery boxes required to construct the energy storage system that supports the system upper limit voltage. The system battery box number represents the minimum number of battery boxes in the energy storage system that supports the system upper limit voltage. Taking the i-th system upper limit voltage of at least two system upper limit voltages as 2000V as an example, the i-th number of battery cells corresponding to the i-th system upper limit voltage is 544. If the first number of battery cells is determined to be 68 based on the above method, the quotient of 8 between the i-th number of battery cells 544 and the first number of battery cells 64 is used as the number of system battery boxes required to construct the energy storage system supporting the i-th system upper limit voltage, that is, at least 8 battery boxes constructed with 68 battery cells are required to support a 2000V energy storage system, etc.

[0061] Similarly, taking the jth system upper limit voltage of at least two system upper limit voltages as 1500V, j is a positive integer, and the jth system upper limit voltage is different from the ith system upper limit voltage; if the jth number of battery cells corresponding to the jth system upper limit voltage is 408, and the first number of battery cells is determined to be 68 based on the above method, then the quotient of the jth number of battery cells 408 and the first number of battery cells 68 is 6 as the number of system battery boxes required to construct the energy storage system supporting the jth system upper limit voltage, that is, at least 6 battery boxes constructed of 68 battery cells are required to support a 1500V energy storage system, etc.

[0062] Optionally, based on the above method, the number of system battery boxes corresponding to at least two energy storage systems can be obtained, and the number of battery boxes in the energy storage system compatible with at least two system upper limit voltages can be determined by comprehensively considering the number of battery boxes in the at least two system. Schematically, the least common multiple of the minimum number of battery boxes corresponding to at least two energy storage systems is obtained as the number of battery boxes in the energy storage system compatible with at least two system upper limit voltages. For example: the minimum number of battery boxes corresponding to the energy storage system with the i-th system upper limit voltage is 8, and the minimum number of battery boxes corresponding to the energy storage system with the j-th system upper limit voltage is 6, then the least common multiple of the two system upper limit voltages is 24, which means that at least 24 battery boxes are required to build an energy storage system to be compatible with the i-th system upper limit voltage and the j-th system upper limit voltage. Among them, the energy storage system supports different system upper limit voltages when the battery boxes of the same number of battery boxes are connected in different connection methods.

[0063] Illustratively, after determining the number of battery boxes to be used in constructing the energy storage system based on the first number of battery cells, the energy storage system is constructed using battery boxes that meet the required number of battery boxes, such that the battery boxes within the energy storage system can support at least two system upper limit voltages. For example, if the number of battery boxes is 24, then 24 battery boxes are required to construct the energy storage system.

[0064] Optionally, considering that the number of battery cells in each battery box is the same, the cell voltage of each battery cell is consistent by default, so the battery box voltage that each battery box can support is the same; therefore, if it is hoped that a constructed energy storage system can support at least two system upper limit voltages, it is necessary to adjust the connection method between multiple battery boxes after constructing the energy storage system with battery boxes of the same number of battery boxes, so that the energy storage system can flexibly support any one of the at least two system upper limit voltages. Schematically, the connection methods between battery boxes generally include series connection and parallel connection. Based on the principle that series voltages are added and parallel voltages are equal, if multiple battery boxes are connected in series, the battery box voltages supported by the multiple battery boxes are added together to determine the voltage supported by the multiple battery boxes together. If multiple battery boxes are connected in parallel, the battery box voltages supported by the multiple battery boxes are the same. In addition, you can also choose to connect multiple battery boxes in a mixed connection method of series connection and parallel connection. For example, if every 10 battery boxes are connected in series, 3 groups of battery boxes in series are obtained (each group has 10 battery boxes in series). If the voltage of each battery box is 100V, then the voltage of each group of battery boxes in series is 1000V. After that, 3 groups of battery boxes in series are connected in parallel, and the voltage supported by the 30 battery boxes together is still 1000V.

[0065] To summarize, by comprehensively considering at least two system upper limit voltages before building the energy storage system, a number of battery boxes that can simultaneously meet at least two system upper limit voltages is obtained, so that an energy storage system that can be used in at least two system upper limit voltage scenarios is built with the number of battery boxes. This enhances the targetedness and compatibility of the system construction process, avoids the problem that the energy storage system can only be applied to a single voltage scenario, and facilitates rapid scenario switching of the energy storage system after construction.

[0066] In an optional embodiment, based on the first number of battery cells, the number of system battery boxes corresponding to at least two system upper limit voltages is first determined, and then the number of battery boxes that are compatible with at least two system upper limit voltages in the energy storage system is determined by combining the number of at least two system battery boxes. Figure 3 As shown above Figure 2 The illustrated embodiment may also be implemented as steps 310 to 350 as follows; wherein step 240 may also be implemented as steps 340 to 360 as follows.

[0067] Step 310: Obtain the cell voltage and at least two system upper limit voltages.

[0068] The at least two system upper limit voltages are at least two voltage upper limits compatible with the preset energy storage system.

[0069] Schematically, at least two system upper limit voltages include a first system upper limit voltage and a second system upper limit voltage, such as the first system upper limit voltage is 2000V, the second system upper limit voltage is 1500V, etc. The cell voltage is the voltage of the battery cell used to construct the energy storage system. Optionally, the cell voltage is the upper limit voltage of the battery cell; or the cell voltage is the safety voltage of the battery cell, etc. For example: the lithium iron phosphate battery ( ) as a battery cell, its cell voltage is 3.65V, etc.

[0070] Step 320 : Determine the number of battery cells corresponding to at least two system upper limit voltages based on the battery cell voltages, and obtain at least two numbers of battery cells.

[0071] The i-th system upper limit voltage corresponds to the i-th number of battery cells, and i is a positive integer. Schematically, the i-th system upper limit voltage is any one of the at least two system upper limit voltages.

[0072] In an optional embodiment, the quotient of at least two system upper limit voltages and the cell voltage is determined to obtain the number of cells corresponding to the at least two system upper limit voltages. Schematically, the at least two system upper limit voltages are used as dividends and the cell voltage is used as divisor to calculate the quotient of at least two system upper limit voltages and the cell voltage; considering that the quotient value may be a decimal, but the number of cells represents the number of battery cells, the number of cells should be a positive integer. When the quotient value is a positive integer, the quotient value can be used as the number of cells corresponding to the system upper limit voltage. For example, if the system upper limit voltage is 1500V and the cell voltage is 4V, the positive integer quotient value of 375 can be used as the number of cells corresponding to the system upper limit voltage of 1500V.

[0073] When the quotient is a decimal, to ensure system safety, a positive integer less than the decimal can be used as the number of cells corresponding to the system's upper voltage limit. This ensures that the voltage of the energy storage system constructed with cells constrained by the number of cells falls within the system's upper voltage limit. For example, if the system's upper voltage limit is 1500V and the cell voltage is 3.65V, the quotient is approximately 410.9. Therefore, the quotient of 410.9 cannot be used directly as the number of cells. A positive integer less than 410.9 must be used as the number of cells corresponding to the system's upper voltage limit of 1500V.

[0074] In some embodiments, when there is a decimal in the quotient corresponding to at least two system upper limit voltages, the maximum positive even number not greater than the quotient is selected to obtain the first positive even number corresponding to the at least two system upper limit voltages. Schematically, if the quotients corresponding to the at least two system upper limit voltages are both decimals, or one of the quotients corresponding to the at least two system upper limit voltages is a decimal, then the maximum positive even number not greater than the quotient is selected for analysis based on the quotient. For example: if the at least two system upper limit voltages include 2000V and 1500V, and the cell voltage is 3.65V, the quotients corresponding to the at least two system upper limit voltages are 547.9 and 410.9, respectively, and both quotients are decimals; if the maximum positive even number not greater than the quotient is 546 and 410, then 546 is used as the first positive even number corresponding to 2000V, and 410 is used as the first positive even number corresponding to 1500V.

[0075] In some embodiments, the first positive even numbers corresponding to the at least two system upper limit voltages are used as the number of battery cells corresponding to the at least two system upper limit voltages. Schematically, after determining the first positive even numbers corresponding to the at least two system upper limit voltages, the first positive even numbers corresponding to the at least two system voltages are directly used as the corresponding number of battery cells, so that an energy storage system with a battery cell number not exceeding the system upper limit voltage can be constructed under the constraint of the number of battery cells. For example, taking the at least two system upper limit voltages including the first system upper limit voltage and the second system upper limit voltage as an example, the first system upper limit voltage is 2000V, the corresponding first positive even number is 546, the second system upper limit voltage is 1500V, the corresponding first positive even number is 410, 546 is used as the number of battery cells corresponding to the first system upper limit voltage of 2000V, 410 is used as the number of battery cells corresponding to the second system upper limit voltage of 1500V, and so on.

[0076] Optionally, when the maximum prime factors corresponding to the first positive even numbers corresponding to at least two system upper limit voltages are the same, the first positive even numbers corresponding to the at least two system upper limit voltages are used as the number of battery cells corresponding to the at least two system upper limit voltages. Schematically, at least two system upper limit voltages each correspond to a first positive even number, and the maximum prime factors corresponding to the at least two first positive integers are determined. If the maximum prime factors are the same, the first positive even numbers corresponding to the at least two system upper limit voltages are used as the number of battery cells corresponding to the at least two system upper limit voltages.

[0077] Optionally, when the maximum prime factors corresponding to the first positive even numbers corresponding to at least two system upper limit voltages are different, the maximum positive even number smaller than the first positive even number is selected as the second positive even number. When the maximum prime factors corresponding to the second positive even numbers corresponding to at least two system upper limit voltages are the same, the second positive even numbers corresponding to at least two system upper limit voltages are used as the number of battery cells corresponding to the at least two system upper limit voltages. Schematically, the prime factors of the first positive even number 546 corresponding to 2000V are determined to include 2, 3, 7, and 13, and the prime factors of the first positive even number 410 corresponding to 1500V are determined to include 2, 5, and 41. Then, the maximum prime factor of 546 is 13, and the maximum prime factor of 410 is 41. The two maximum prime factors are not the same. Therefore, for the first positive even numbers corresponding to at least two system upper limit voltages, the maximum positive even numbers smaller than the first positive even numbers are selected as the second positive even numbers. Then, the second positive even numbers corresponding to at least two system upper limit voltages are obtained, such as the second positive even numbers corresponding to 2000V. The second positive even number corresponding to 1500V is 408, so the prime factors of the second positive even number 544 corresponding to 2000V include 2, 2, 2, 2, 2, 17, and the prime factors of the second positive even number 408 corresponding to 1500V include 2, 2, 2, 3, 17. The two largest prime factors are both 17, that is, the same. Therefore, at least two system upper limit voltages are respectively corresponded to the second positive even numbers, as the number of battery cells corresponding to the at least two system upper limit voltages, then the number of battery cells with a system upper limit voltage of 2000V is 544, and the number of battery cells with a system upper limit voltage of 1500V is 408.

[0078] Schematically, taking at least two system upper limit voltages of 2000V and 1500V as an example, based on the system upper limit voltage and the cell voltage of 3.65, the quotient corresponding to 2000V is determined to be 547.9, and the quotient corresponding to 1500V is 410.9; as shown in Tables 1 and 2, the process of determining the number of battery cells corresponding to the two system upper limit voltages is shown in tabular form.

[0079] Table 1: Determine the number of cells corresponding to 2000V

[0080]

[0081] Table 2: Determine the number of cells corresponding to 1500V

[0082]

[0083] That is: in descending order, find the common divisor (factors are also called divisors, so common factors can also be called common divisors) corresponding to the even integers that are less than the quotient of 547.9 and the even integers that are less than the quotient of 410.9, and determine the largest common prime factor therefrom; as shown in Tables 1 and 2, compared with the case where the largest common factor is 2 in the case of the combination of 546 and 410, the case where the largest common factor is 17 in the case of the combination of 544 and 408 is more convenient for the subsequent combination of battery cells to construct a battery box, so 544 can be used as the number of battery cells corresponding to 2000V and 408 can be used as the number of battery cells corresponding to 1500V as an illustrative preferred solution. For example, using 544 battery cells with a voltage of 3.65V in series to achieve a system upper limit voltage of 2000V can be expressed as 544S (S stands for Series in Series Connection). Similarly, using 408 battery cells with a voltage of 3.65V in series to achieve a system upper limit voltage of 1500V can be expressed as 408S, and so on. This is not limited here.

[0084] Step 330 , determining a common factor of at least two battery cell quantities, and determining a first battery cell quantity for constructing the battery box based on the common factor;

[0085] Alternatively, the at least two cell quantities may be information directly determined based on the quotients of the at least two system upper limit voltages and the cell voltages, such as using the quotients corresponding to the at least two system upper limit voltages as the cell quantities to obtain the at least two cell quantities; then, factors (such as prime factors) corresponding to the at least two cell quantities are determined, thereby determining the factors shared by the at least two cell quantities as common factors (such as the shared prime factors as the common factors). Alternatively, the at least two cell quantities may also be information determined by combining the quotients and prime factors corresponding to the two system upper limit voltages (such as Tables 1 and 2 above), and thus the common factor information determined when determining the at least two cell quantities may be used.

[0086] In an optional embodiment, the greatest common factor of at least two battery cell quantities is used as the first battery cell quantity for constructing the battery box.

[0087] Illustratively, after determining at least two numbers of battery cells, the common factors among the factors corresponding to the at least two numbers of battery cells are determined as common factors, and the greatest common factor among them is determined. For example: as shown in Tables 1 and 2, the common factor of the combination of 546 and 410 is 2, so the greatest common factor of the combination of 546 and 410 is 2; the common factors of the combination of 544 and 408 include 2 and 17, so the greatest common factor of the combination of 544 and 408 is 17, etc. Optionally, after determining the greatest common factor, the greatest common factor is used as the first number of battery cells, thereby constructing a battery box with battery cells of the first number of battery cells. For example: the greatest common factor is 17, 17 is used as the first number of battery cells, thereby constructing a battery box with 17 battery cells.

[0088] In an optional embodiment, a preset multiple of a greatest common factor of at least two battery cell quantities is used as the first battery cell quantity for constructing the battery box.

[0089] Optionally, the preset multiple is a pre-set integer multiple. For example, considering that batteries repeatedly expand and contract during charging and discharging, and that the greater the expansion is at the end of their lifespan, the greater the expansion force generated, the preset multiple is pre-set to account for this expansion variation. Therefore, when determining a first number of battery cells in a battery box based on at least two battery cell numbers, a preset multiple is pre-set to account for this expansion variation. After determining a greatest common factor, the product of the greatest common factor and the preset multiple is used as the first number of battery cells, thereby constructing a battery box with battery cells of the first number of battery cells. For example, if the greatest common factor is 17 and the preset multiple is 4, the product of 17 and 4, 68, is used as the first number of battery cells, thereby constructing a battery box with 68 battery cells. The first number of battery cells is a compatible number determined based on the numbers of battery cells corresponding to at least two system upper limit voltages. Therefore, constructing a battery box with battery cells of the first number of battery cells helps to establish an integer multiple relationship between the energy storage system and the battery box, thereby facilitating the construction of an energy storage system compatible with at least two system upper limit voltages based on the battery box.

[0090] Step 340: Determine the battery box voltage of a single battery box consisting of the first number of battery cells.

[0091] Illustratively, the first cell quantity is the number of battery cells in a single battery box. Therefore, based on the first cell quantity and the cell voltages corresponding to the battery cells, the battery box voltage corresponding to the single battery box can be obtained. For example, if the first cell quantity is 68 and the cell voltage corresponding to the battery cells is 3.65V, the battery box voltage of the single battery box is 248.2V. The battery box voltage represents the voltage value supported by a single battery box.

[0092] Step 350 : Determine the quotients of at least two system upper limit voltages and the battery box voltage, and obtain the number of system battery boxes corresponding to the at least two system upper limit voltages.

[0093] Schematically, at least two system upper limit voltages represent the upper limit voltages that the preset energy storage system needs to support. The first number of battery cells is a compatible number determined based on the number of battery cells corresponding to the at least two system upper limit voltages. Therefore, a battery box constructed based on the battery cells of the first number of cells helps to build an energy storage system compatible with at least two system upper limit voltages. Using the at least two system upper limit voltages as dividends and the battery box voltage as a divisor, the number of system battery boxes corresponding to the at least two system upper limit voltages can be effectively determined. The number of system battery boxes represents the minimum number of battery boxes in the energy storage system that supports the system upper limit voltages. The kth number of system battery boxes is used to represent the minimum number of battery boxes in the energy storage system that supports the kth system upper limit voltage, where k is a positive integer. For example, if one system upper limit voltage is 2000V and the battery box voltage is 248.2V, the quotient of the two is approximately 8; if another system upper limit voltage is 1500V and the battery box voltage is 248.2V, the quotient of the two is approximately 6. That is to say: at least 8 battery boxes are needed to build an energy storage system to support the system upper limit voltage of 2000V. Similarly, at least 6 battery boxes are needed to build an energy storage system to support the system upper limit voltage of 1500V.

[0094] In an optional embodiment, the at least two system upper limit voltages include a first system upper limit voltage and a second system upper limit voltage.

[0095] Optionally, the quotient of the first system upper limit voltage and the battery box voltage is used as the number of first system battery boxes supporting the first system upper limit voltage. The number of first system battery boxes is used to represent the minimum number of battery boxes deployed when the energy storage system supports the first system upper limit voltage. Optionally, the quotient of the second system upper limit voltage and the battery box voltage is used as the number of second system battery boxes supporting the second system upper limit voltage. The number of second system battery boxes is used to represent the minimum number of battery boxes deployed when the energy storage system supports the second system upper limit voltage.

[0096] Step 360 : Based on the number of system battery boxes corresponding to the at least two system upper limit voltages, obtain the number of battery boxes in the energy storage system that are compatible with the at least two system upper limit voltages.

[0097] Schematically, after obtaining the number of battery boxes of at least two systems, in order to make the constructed energy storage system compatible with at least two system upper limit voltages, it is necessary to analyze the commonalities of the number of battery boxes of at least two systems to obtain the number of battery boxes included in the energy storage system when compatible with at least two system upper limit voltages. The number of battery boxes is used to characterize the number of battery boxes used when constructing the energy storage system.

[0098] In an optional embodiment, a common multiple of the number of system battery boxes corresponding to at least two system upper limit voltages is obtained as the number of battery boxes used to construct the energy storage system. Illustratively, the common multiple represents a multiple shared by at least two integers. In other words, the common multiple is a number that is divisible by the at least two integers at the same time.

[0099] In some embodiments, a common multiple of the number of battery boxes in the first system and the number of battery boxes in the second system is obtained as the number of battery boxes used to construct the energy storage system. For example, the number of battery boxes in the first system is 8, and the number of battery boxes in the second system is 6. The common multiple of the number of battery boxes in the first system and the number of battery boxes in the second system is a value such as 24, 48, or 72.

[0100] In an optional embodiment, the least common multiple of the number of system battery boxes corresponding to at least two system upper limit voltages is obtained as the number of battery boxes used to construct the energy storage system. In an exemplary embodiment, the least common multiple is the smallest common multiple among multiple common multiples corresponding to the number of at least two system battery boxes. If the least common multiple is used as the number of battery boxes, the energy storage system can be constructed with fewer battery boxes, which helps avoid the problem of oversizing the energy storage system and fully utilizes the energy storage resources of the battery boxes.

[0101] In some embodiments, the least common multiple of the number of battery boxes in the first system and the number of battery boxes in the second system is obtained as the number of battery boxes used to construct the energy storage system. For example, the number of battery boxes in the first system is 8, the number of battery boxes in the second system is 6, and the common multiple of the number of battery boxes in the first system and the number of battery boxes in the second system is a value such as 24, 48, or 72. The least common multiple is 24, indicating that the number of battery boxes used to construct the energy storage system can be selected as 24.

[0102] In an embodiment of the present application, a process is described for determining the number of system battery boxes corresponding to at least two system upper limit voltages based on the battery box voltage, thereby obtaining the number of battery boxes compatible with at least two system upper limit voltages based on the number of at least two system battery boxes. With the help of the number of system battery boxes, the minimum number of battery boxes required to support different system upper limit voltages can be analyzed more specifically, thereby obtaining battery boxes that are helpful in adapting to at least two system upper limit voltages by combining the common multiples (such as the least common multiple) of the number of at least two system battery boxes, so that an energy storage system that is compatible with at least two system upper limit voltages can be constructed based on the battery boxes of the number of battery boxes, thereby improving the adaptability of the energy storage system, facilitating the adaptation of an already constructed energy storage system to other system upper limit voltages considered during construction, and improving the efficiency of the system.

[0103] In an optional embodiment, the at least two system upper limit voltages include a first system upper limit voltage and a second system upper limit voltage. Figure 4 As shown above Figure 2 The process of constructing the energy storage system according to the number of battery boxes in step 240 shown can also be implemented as the following steps 410 to 440.

[0104] Step 410 , connecting a first number of battery cells in series to obtain a single battery box, and obtaining a first number of battery boxes.

[0105] Illustratively, the first number of battery cells is used to describe the number of battery cells that constitute a single battery box. For example, if the first number of battery cells is 68, it means that a battery box is constructed from 68 battery cells. Optionally, based on the principle that voltages in series add and voltages in parallel are equal, to ensure that the battery box constructed from battery cells reaches the maximum voltage, the battery cells in the battery box with the first number of battery cells are connected in series to obtain a battery box constructed from the first number of battery cells.

[0106] Step 420 , determining a battery box voltage of a single battery box composed of a first number of battery cells.

[0107] Illustratively, the first cell quantity is the number of battery cells in a single battery box. Therefore, based on the first cell quantity and the cell voltages corresponding to the battery cells, the battery box voltage corresponding to the single battery box can be obtained. The battery box voltage corresponding to the battery box is the product of the first cell quantity and the cell voltage. For example, if the first cell quantity is 68 and the cell voltage corresponding to the battery cells is 3.65V, the battery box voltage of the single battery box is 248.2V. The battery box voltage represents the voltage value supported by a single battery box.

[0108] In an optional embodiment, considering that different numbers of battery cells correspond to different system upper limit voltages, if a fixed number of battery boxes is desired to support different system upper limit voltages, the battery box connection method is analyzed based on the addition of series voltages and equal parallel voltages. By adjusting the series and parallel connection of the battery boxes, the purpose of supporting different system upper limit voltages with different connection methods can be achieved while keeping the number of battery boxes unchanged.

[0109] In some embodiments, after determining the number of battery boxes required to construct the energy storage system based on the first number of battery cells, the energy storage system can be constructed using battery boxes of the same number of battery boxes; when the energy storage system is expected to support a first system upper limit voltage, the battery boxes are connected in the connection method of the following step 430; when the energy storage system is expected to support a second system upper limit voltage, the battery boxes are connected in the connection method of the following step 440, thereby connecting the battery boxes in different connection methods while keeping the number of battery boxes unchanged to support different system upper limit voltages.

[0110] Step 430, determine the quotient of the first system upper limit voltage and the battery box voltage to obtain the number of first system battery boxes corresponding to the first system upper limit voltage; based on the number of first system battery boxes and the number of battery boxes, connect the battery boxes of the same number of battery boxes in a first connection method to obtain an energy storage system that supports the first system upper limit voltage.

[0111] Illustratively, the minimum number of battery boxes in the energy storage system required to support the first system upper limit voltage is determined based on the quotient of the first system upper limit voltage and the battery box voltage, i.e., the first system battery box quantity is determined. The number of battery boxes is described based on the first system battery box quantity, so the first system battery box quantity is a positive integer. For example, if the first system upper limit voltage is 2000V and the battery box voltage is 248.2V, then the quotient of the first system upper limit voltage and the battery box voltage is determined to be approximately 8.05. Based on the fact that the first system battery box quantity is a positive integer, the first system battery box quantity is set to 8.

[0112] In an optional embodiment, the quotient of the number of battery boxes and the number of battery boxes of the first system is obtained to obtain the first parallel number. Schematically, the number of battery boxes is the number of battery boxes required to construct the energy storage system based on the first number of battery cells. The energy storage system of the number of battery boxes is the number of battery boxes that can be compatible with at least two system upper limit voltages. The number of battery boxes of the first system is the minimum number of battery boxes in the energy storage system when supporting the first system upper limit voltage. Therefore, the battery boxes of the first system battery box are able to support the first system upper limit voltage. Optionally, since the number of battery boxes is greater than the number of battery boxes of the first system, the battery boxes exceeding the number of battery boxes of the first system should be considered for connection in parallel to obtain the energy storage system, so as to avoid the voltage obtained by directly connecting the battery boxes of the first system in series exceeding the first system upper limit voltage, which affects the safety of the energy storage system. Schematically, the number of battery boxes and the number of battery boxes of the first system are both used to describe the number of battery boxes, so both are positive integers. The quotient of the number of battery boxes and the number of battery boxes of the first system is calculated to divide the battery boxes that need to be connected in parallel and in series. For example, if the number of battery boxes is 24 and the number of first system battery boxes supporting the upper limit voltage of the first system is 8, the quotient of the number of battery boxes and the number of first system battery boxes is 3, which is the first parallel quantity.

[0113] In an optional embodiment, the number of battery boxes of the first system battery box is connected in series to obtain a first number of first battery clusters in parallel. The number of battery boxes is the product of the first parallel number and the number of battery boxes of the first system; the number of battery boxes of the first system is the number of battery boxes connected in series. A single first battery cluster is obtained by connecting the number of battery boxes of the first system battery box in series. Then, after connecting the number of battery boxes of the first system battery box in series, the first number of first battery clusters in parallel will be obtained based on the number of battery boxes. In principle, considering that the number of battery boxes of the first system battery box can support the upper limit voltage of the first system, it is preferred to connect the number of battery boxes of the first system battery box in series. For example, if the number of battery boxes is 24 and the number of first system battery boxes corresponding to the upper limit voltage of the first system is 8, then 8 battery boxes are connected in series to obtain 3 first battery clusters, each of which is obtained by connecting 8 battery boxes in series; 3 first battery clusters are obtained based on 24 battery boxes.

[0114] In an optional embodiment, a first parallel number of first battery clusters are connected in parallel to obtain an energy storage system that supports the first system upper limit voltage. Schematically, since each first battery cluster is constructed from the first system number of battery boxes, and the first system number of battery boxes is the minimum number of battery boxes that can support the first system upper limit voltage, the battery cluster voltage of each first battery cluster is the first system upper limit voltage; in order to avoid the energy storage system that hopes to be compatible with at least two system upper limit voltages exceeding the first system upper limit voltage, after obtaining the first parallel number of first battery clusters, the first parallel number of first battery clusters are connected in parallel, so that the energy storage system constructed from the battery boxes of the battery box number can support the first system upper limit voltage. Therefore, the first parallel number is used to characterize the number of battery clusters connected in parallel.

[0115] Indicative, such as Figure 5 As shown, if the number of battery boxes is 24, then 24 battery boxes 510 ( Figure 5 The energy storage system is constructed by forming a small rectangle as shown in FIG. 3 ; if the energy storage system supports the upper limit voltage of the first system, the number of battery boxes of the first system is determined to be 8, then 8 battery boxes are connected in series to obtain 3 first battery clusters, such as Figure 5 The three columns of battery clusters shown are first battery cluster 1, first battery cluster 2, and first battery cluster 3; the three first battery clusters are connected in parallel, so that the energy storage system constructed by 24 battery boxes can support the first system upper limit voltage of 2000V; among them, the first battery cluster constructed by 8 battery boxes in series can support 2000V individually, and the parallel voltage of the three battery clusters connected in parallel is the same, so the 24 battery boxes together construct an energy storage system that supports the first system upper limit voltage.

[0116] In addition, if the energy storage system is a container with a length, width and height of 3300mm×2438mm×2896mm, Figure 5 5 is a front view of the energy storage system. In addition, other components such as an electrical compartment 520 may be deployed in the energy storage system. In addition, the energy storage system supporting the first system upper limit voltage can also be expressed as 1P68S×8×3, where 1P68S represents the configuration of the battery box, i.e., 1 in parallel and 68 in series. 8 is the number of battery boxes that construct a single battery cluster, and 3 is the number of battery clusters that construct the energy storage system, which is not limited here.

[0117] Step 440, determine the quotient of the second system upper limit voltage and the battery box voltage to obtain the number of second system battery boxes corresponding to the second system upper limit voltage; based on the number of second system battery boxes and the number of battery boxes, connect the battery boxes of the same number of battery boxes in a second connection method to obtain an energy storage system that supports the second system upper limit voltage.

[0118] Illustratively, the minimum number of battery boxes in the energy storage system required to support the second system upper limit voltage is determined based on the quotient of the second system upper limit voltage and the battery box voltage, i.e., the second system battery box quantity is determined. The number of battery boxes is described based on the second system battery box quantity, so the second system battery box quantity is a positive integer. For example, if the second system upper limit voltage is 1500V and the battery box voltage is 248.2V, then the quotient of the second system upper limit voltage and the battery box voltage is determined to be approximately 6.04. Based on the second system battery box quantity being a positive integer, the second system battery box quantity is set to 6.

[0119] In one optional embodiment, the second parallel connection number is obtained by taking the quotient of the number of battery boxes and the number of battery boxes in the second system. Illustratively, the number of battery boxes in an energy storage system is the number of battery boxes that can support at least two system upper limit voltages. The number of battery boxes in the second system serves as the minimum number of battery boxes in the energy storage system to support the second system upper limit voltage. Therefore, the battery boxes in the second system number can support the second system upper limit voltage. Optionally, since the number of battery boxes is greater than the number of battery boxes in the second system, the battery boxes exceeding the second system number should be considered for parallel connection to form the energy storage system. This avoids the situation where the voltage resulting from directly connecting the battery boxes in series exceeds the second system upper limit voltage, which could affect the safety of the energy storage system. Illustratively, the number of battery boxes and the second system number of battery boxes are both used to describe the number of battery boxes, and therefore both are positive integers. The quotient of the number of battery boxes and the second system number of battery boxes is calculated to distinguish between the number of battery boxes required for parallel connection and the number of battery boxes required for series connection. For example, if the number of battery boxes is 24 and the number of second system battery boxes required to support the second system upper limit voltage is 6, then the quotient of the number of battery boxes and the second system number of battery boxes yields the second parallel connection number of 4.

[0120] In an optional embodiment, a second number of battery boxes connected in series are connected in series to obtain a second number of second battery clusters connected in parallel.

[0121] Among them, the number of battery boxes is the product of the second parallel number and the second system battery box number; the second system battery box number is the number of battery boxes in series, and a single second battery cluster is obtained by connecting the battery boxes of the second system battery box number in series. After connecting the battery boxes of the second system battery box number in series, the second parallel number of second battery clusters will be obtained based on the battery boxes of the battery box number.

[0122] For example, considering that the number of battery boxes in the second system can support the second system upper limit voltage, it is preferred to connect the battery boxes in series. For example, if there are 24 battery boxes and the second system upper limit voltage corresponds to 6 battery boxes, then 6 battery boxes are connected in series to obtain 4 second battery clusters, each of which is formed by 4 battery boxes connected in series. Therefore, 24 battery boxes are used to obtain 4 second battery clusters.

[0123] In an optional embodiment, a second number of second battery clusters are connected in parallel to obtain an energy storage system that supports a second system upper limit voltage.

[0124] Schematically, since each second battery cluster is constructed by battery boxes of the second system number of battery boxes, and the second system number of battery boxes is the minimum number of battery boxes that can support the second system upper limit voltage, the battery cluster voltage of each second battery cluster is the second system upper limit voltage; in order to avoid the energy storage system that hopes to be compatible with at least two system upper limit voltages exceeding the second system upper limit voltage, after obtaining the second parallel number of second battery clusters, the second parallel number of second battery clusters are connected in parallel, so that the energy storage system constructed by the battery boxes of the second system number of battery boxes can support the second system upper limit voltage.

[0125] Therefore, the second parallel number is used to represent the number of battery clusters connected in parallel.

[0126] Indicative, such as Figure 6 As shown, if the number of battery boxes is 24, then 24 battery boxes 610 ( Figure 6 The energy storage system is constructed by forming a small rectangle as shown in FIG. 3 ; when the energy storage system supports the upper limit voltage of the second system, the number of battery boxes of the second system is determined to be 6, and then 6 battery boxes are connected in series to obtain 4 second battery clusters, as shown in FIG. Figure 6The four rows of battery clusters shown are second battery cluster 1, second battery cluster 2, second battery cluster 3 and second battery cluster 4; the four second battery clusters are connected in parallel, so that the energy storage system constructed by 24 battery boxes can support the second system upper limit voltage of 1500V; among them, the second battery cluster constructed by 8 battery boxes in series can support 1500V individually, and the parallel voltage of the four battery clusters connected in parallel is the same, so the 24 battery boxes together construct an energy storage system that supports the second system upper limit voltage.

[0127] In addition, if the energy storage system is Figure 5 The same container with length, width and height of 3300mm×2438mm×2896mm, Figure 6 6 is a front view of the energy storage system. In addition, other components such as an electrical compartment 620 may be deployed in the energy storage system. In addition, the energy storage system supporting the second system upper limit voltage can also be expressed as 1P68S×6×4, where 1P68S represents the configuration of the battery box, i.e., 1 in parallel and 68 in series. 6 is the number of battery boxes that construct a single battery cluster, and 4 is the number of battery clusters that construct the energy storage system, which is not limited here.

[0128] by Figure 5 and Figure 6 The comparison shows that the energy storage system was constructed based on the analysis of two system upper limit voltages of 2000V and 1500V. The same number of battery boxes (24 battery boxes) are deployed in the energy storage system. When supporting different system upper limit voltages, the energy storage system can achieve the goal of flexible voltage support by flexibly adjusting the connection method between the battery boxes while keeping the number of battery boxes unchanged.

[0129] In an embodiment of the present application, a method of connecting battery boxes in different connection modes when the number of battery boxes remains unchanged is introduced if different system upper limit voltages are supported. After the energy storage system is constructed by using battery boxes of the same number of battery boxes, the battery boxes are flexibly analyzed to form battery clusters according to the system upper limit voltage that the energy storage system needs to support. The battery boxes in the battery cluster are connected in series, and multiple battery clusters are connected in parallel. This not only allows the voltage support situation to be flexibly changed while ensuring that the number of battery boxes remains unchanged, but also helps to continue to maintain the currently selected system upper limit voltage when some battery boxes are damaged, thereby ensuring the system operation stability of the energy storage system and improving the system utilization rate of the energy storage system.

[0130] In an optional embodiment, a battery module is constructed from at least one battery cell, a battery box is constructed from at least one battery module, a battery cluster is constructed from at least one battery cluster, and a hierarchical architecture of an energy storage system is constructed from at least one battery cluster. The second number of battery cells constituting the battery module is determined based on a common factor of at least two numbers of battery cells, and then a battery box is constructed based on the battery module. Schematically, as shown in FIG. Figure 7 As shown above Figure 2 The illustrated step 230 may also be implemented as the following steps 710 to 720 .

[0131] Step 710 , determining a common factor of at least two battery cell quantities, and using the greatest common factor of the at least two battery cell quantities as a second battery cell quantity for constructing battery cells of a single battery module.

[0132] Optionally, for any i-th number of battery cells among at least two numbers of battery cells, the prime factors of the i-th number of battery cells are determined; the prime factors corresponding to the at least two numbers of battery cells are determined, and the largest common prime factor among the prime factors corresponding to the at least two numbers of battery cells is determined as the greatest common factor. For example, if the prime factors of the number of battery cells 544 include 2, 2, 2, 2, and 17, and the prime factors of the number of battery cells 408 include 2, 2, 2, 3, and 17, then the common prime factors include 2 and 17, with the largest common prime factor being 17. Therefore, the second number of battery cells used to construct a single battery module is determined to be 17, i.e., 17 battery cells are used to construct a single battery module. Illustratively, to maximize the battery cell voltage accumulation capability, the second number of battery cells is connected in series to form a single battery module. For example, if 17 battery cells are connected in series to form a single battery module, the single battery module can be represented as 17S.

[0133] Step 720: Obtain the number of battery modules used to construct a single battery box based on the second number of battery cells.

[0134] Since a single battery box is constructed from at least one battery module, the number of modules used to construct the battery modules of a single battery box can be obtained when the first number of battery cells and the second number of battery cells are determined. Optionally, the quotient of the first number of battery cells and the second number of battery cells is used as the number of modules for constructing the battery modules of a single battery box, wherein the first number of battery cells is the product of the second number of battery cells and the number of modules. Schematically, taking the case where the second number of battery cells is 17 and the first number of battery cells is 68 as an example, if the number of battery modules in a single battery box is the quotient of the first number of battery cells and the second number of battery cells, the number of modules for constructing the battery modules of a single battery box is 4, which means that 4 battery modules construct one battery box.

[0135] In an optional embodiment, after a battery box is constructed based on a battery module and an energy storage system is constructed using a certain number of battery boxes, the number of battery boxes in a battery cluster when the battery box is used to construct a battery cluster is flexibly determined based on the difference in the system upper limit voltage supported by the energy storage system, that is, the battery clusters in the energy storage system are flexibly divided.

[0136] Optionally, the quotient of the first system upper limit voltage and the battery box voltage is determined to obtain the number of first system battery boxes corresponding to the first system upper limit voltage; the quotient of the number of battery boxes and the number of first system battery boxes is obtained to obtain a first parallel number, where the number of battery boxes is the product of the first parallel number and the number of first system battery boxes; the battery boxes of the first system battery box number are connected in series to obtain a first parallel number of first battery clusters; and the first parallel number of first battery clusters are connected in parallel to obtain an energy storage system that supports the first system upper limit voltage. In an illustrative embodiment, the first parallel number is the number of battery clusters determined under the first system upper limit voltage, and the first system battery box number is the number of battery boxes in a single battery cluster determined under the first system upper limit voltage, thereby flexibly determining the battery cluster division of the energy storage system under the condition of supporting the first system upper limit voltage.

[0137] Optionally, the quotient of the second system upper limit voltage and the battery box voltage is determined to obtain the number of second system battery boxes corresponding to the second system upper limit voltage; the quotient of the number of battery boxes and the number of the second system battery boxes is obtained to obtain a second parallel number; the battery boxes of the second system battery box number are connected in series to obtain a second parallel number of second battery clusters; and the second parallel number of second battery clusters are connected in parallel to obtain an energy storage system that supports the second system upper limit voltage. In an illustrative embodiment, the second parallel number is the number of battery clusters determined under the second system upper limit voltage, and the second system battery box number is the number of battery boxes in a single battery cluster determined under the second system upper limit voltage, thereby flexibly determining the battery cluster division of the energy storage system under the second system upper limit voltage.

[0138] In summary, by comprehensively considering at least two system upper limit voltages before building the energy storage system, a number of battery boxes that can simultaneously meet at least two system upper limit voltages are obtained, which enhances the targetedness and compatibility of the system construction process, avoids the problem that the energy storage system can only be applied to a single voltage scenario, and facilitates the rapid scenario switching of the energy storage system after construction.

[0139] In an optional embodiment, before constructing the energy storage system, the size constraint data of the energy storage system is first determined, and then the size constraint data and the number of battery boxes determined based on the above energy storage system construction method are comprehensively analyzed by a size generation model, so that the energy storage system is constructed using the number of battery boxes. Figure 8As shown, constructing the energy storage system according to the number of battery boxes in the above step 240 can also be implemented as the following steps 810 to 840.

[0140] Step 810: Acquire size constraint data of the energy storage system.

[0141] Among them, the size constraint data is used to constrain the array arrangement of at least one component in the energy storage system from the size dimension. Optionally, the component is part of the content that constitutes the energy storage system, and the component includes at least one of a battery cell, a battery module, a battery box, and a battery cluster. Schematically, the size dimension is an analysis of the component from the perspective of component size; in the design of the energy storage system, it is necessary to pre-set size constraint data to constrain the size during the construction of the energy storage system. Optionally, the size constraint data is preset data for the overall size of the energy storage system, such as the size constraint data is a standard size of 20 feet, 10 feet, etc.; or, the size constraint data is a set non-standard size, etc.

[0142] Step 820 , analyzing the size constraint data and the number of battery boxes through a size generation model to obtain battery box size data of a single battery box in the energy storage system.

[0143] The dimensional generation model is a trained mathematical model. Optionally, the dimensional generation model is composed of multiple mathematical function formulas corresponding to at least one function type, including at least one of a linear function, a nonlinear function (such as an exponential function, a logarithmic function, a power function, etc.), a polynomial function, and a piecewise function. During training, the dimensional generation model learns the relationship between dimensional constraint data and dimensional data of at least one component. Optionally, the component dimensional data of at least one component learned by the dimensional generation model during training is typically implemented as component dimensional data corresponding to multiple components. That is, the dimensional generation model learns the relationship between dimensional constraint data and dimensional data of multiple components during training. When predicting component dimensional data using the dimensional generation model, the at least one component analyzed is the at least one component learned during training.

[0144] In some embodiments, in addition to the size constraint data influencing the construction process of the energy storage system, there are also size-influencing parameters that affect the construction process of the energy storage system. The size-influencing parameters are parameters that affect the spatial layout of the energy storage system. The size-influencing parameters are generally pre-set parameter types. For example, the size-influencing parameters include at least one of a variety of parameters such as the number of components, the spacing between components, and the arrangement of components (head-to-tail arrangement or shoulder-to-shoulder arrangement). Illustratively, the size-influencing parameters include the number of components, such as the number of battery boxes, the number of cells, and the number of modules. Optionally, during training, the size generation model learns the relationship between the size constraint data, the size data of at least one component, and the number of at least one component; the size constraint data and the number of battery boxes are analyzed by the size generation model to analyze the battery box size data of a single battery box in the energy storage system when there are battery boxes with the same number of battery boxes, subject to the constraints of the size constraint data.

[0145] Schematically, the battery box size data represents the size of a single battery box in the energy storage system. For example, if the size constraint data represents the system size data of the energy storage system, after obtaining the size generation model, if the number of battery boxes calculated previously is less than the system size data, the size generation model is used as an analysis parameter to obtain the battery box size data of a single battery box in the energy storage system. This can then be inferred from the system-to-battery box size inference sequence.

[0146] Step 830 : Analyze the battery box size data and the number of first battery cells using a size generation model to obtain battery cell size data of a single battery cell in the energy storage system.

[0147] Illustratively, after analyzing and obtaining the battery box size data, the dimensions of individual battery cells within the battery box are analyzed based on the previously calculated first number of battery cells used in constructing a single battery box to obtain the battery cell size data. In other words, the battery cell size data is used to describe the size of the battery cells.

[0148] Optionally, when a battery box is constructed from battery modules, and a battery module is constructed from battery cells, the number of modules of the battery modules in a single battery box is determined; based on the battery box size data and the number of modules, the module size data of a single battery module in the battery box is obtained. Schematically, under the constraints of the battery box size data, based on the number of modules of the battery modules in a single battery box, the module size data of a single battery module when constructing the battery box is analyzed, and the module size data is the size of a single battery module. Optionally, based on the number of modules of the battery modules in the battery box, a second number of battery cells in a single battery module is determined, and the product of the number of modules and the second number of cells is the first number of cells; based on the module size data and the second number of cells, the cell size data of a single battery cell in the energy storage system is obtained. Schematically, under the constraints of the module size data, based on the number of battery cells in a single battery module, the cell size data of a single battery cell when constructing the battery module is analyzed, and the cell size data is the size of a single battery cell. That is, the size data of a single battery cell in the energy storage system can be obtained by recursively deducing the sizes of the energy storage system, battery box, battery module, and battery cell in sequence. In addition, when the energy storage system is composed of multiple battery clusters, and a single battery cluster is composed of multiple battery boxes, the size data of a single battery cell in the energy storage system can also be obtained by recursively deducing the sizes of the energy storage system, battery cluster, battery box, battery module, and battery cell in sequence.

[0149] Step 840 : Under the constraints of the cell size data and the battery box size data, the energy storage system is constructed using the first battery box with the same number of battery boxes.

[0150] Illustratively, the cell size data is the size of the battery cell, and the battery box size data is the size of the battery box. By integrating the constraints of the size data of multiple components, the first battery box of the battery box quantity can be used to more specifically construct an energy storage system. Alternatively, when obtaining cell size data, module size data, battery box size data, or battery cluster size data, the constraints of the cell size data, module size data, battery box size data, and battery cluster size data can also be integrated to construct an energy storage system using the first battery box of the battery box quantity, etc., without limitation herein.

[0151] like Figure 9 As shown, it is a front view of the energy storage system constructed by using the first battery box of the number of battery boxes under the constraint of size data. The energy storage system is a container with a length, width and height of 3300mm×2438mm×2896mm, in which an electrical cabin 910 is deployed (for example, the size analysis process is constrained by the size-influencing parameters in the size generation model analysis process), and also includes 24 battery boxes 920. The 24 battery boxes 920 are distributed in the form of three columns and eight rows. For example, the height of the battery box 920 is 272mm. Figure 10 As shown, Figure 9 Related, under the constraints of dimensional data, a top view of the energy storage system is constructed using the first battery box of the number of battery boxes. The energy storage system is a container with a length, width and height of 3300mm × 2438mm × 2896mm, for example, including three battery clusters 1010 (each battery cluster is 776mm long, 2230mm high, and the width is not shown), and each battery cluster 1010 includes 8 battery boxes (refer to Figure 9 The battery box 920 is constructed by each battery box including 68 battery cells. Figure 10 Every 17 battery cells form a battery module, and every 4 battery modules form a battery box. Figure 11 The figure shows a schematic diagram of a battery cell to system (CTL) arrangement. Multiple battery cells form a battery module, multiple battery modules form a battery box 1110, and multiple battery boxes form an energy storage system 1120. The energy storage system may also be pre-configured with other components, such as an electrical compartment, but these are not limited here.

[0152] In an optional embodiment, a method for constructing an energy storage system is described as follows.

[0153] Considering that the current large-scale new energy electrochemical energy storage systems on the market are still primarily 1500V (the upper limit of the system voltage), the upgrade of the DC side voltage of the energy storage system from 1000V to 1500V is due to the upgrade of the solar photovoltaic system voltage from 1000V to 1500V, and the former needs to be matched with the latter. 2000V solar photovoltaic systems have been launched, but there is no mature supporting 2000V high-voltage energy storage system design. However, 2000V energy storage systems will become increasingly popular in the foreseeable future as various supporting components and equipment are optimized and upgraded, and the supporting standard system matures. In addition, the current mainstream large-capacity energy storage systems designed and manufactured in 20-foot standard high-cubic-meter containers weigh over 40 tons or even close to 50 tons, making it difficult or even impossible to transport them from the manufacturer to the project site using an integrated method (integration of all or most of the main components and equipment of the container energy storage system before leaving the factory). This is especially true for overseas projects involving sea transportation and destination transportation. Numerous restrictions inadvertently increase the uncontrollable risks and high logistics costs during the transportation of hazardous materials.

[0154] 1. Taking the case where the upper voltage limit of the first system is 2000V and the upper voltage limit of the second system is 1500V as an example, the grouping method of the energy storage system is derived according to the upper voltage limit of the system and considering compatibility with 1500V and 2000V systems. The derivation process is shown below. (1) The upper limit voltage of the lithium iron phosphate single cell is 3.65V, 2000 / 3.65≈547.9, 1500 / 3.65≈410.9; (2) In descending order, find the common divisor among the even integers less than 547.9 and the even integers less than 410.9, as shown in Table 1 and Table 2 above; From the above reasoning data, it can be seen that the optimal solution is: 2000V uses 544S battery cells in series and 1500V uses 408S battery cells in series; (Here S means series); (3) Therefore, 17S is the smallest unit that cannot be split, 34S contains 2 such smallest units, 68S contains 4 such smallest units, and 136S contains 8 such smallest units [the latter 3 can also be divided into battery cell to battery pack (Cell to Pack, CTP) method, that is, the battery box can be directly constructed from the battery cells, without the need to construct the battery module from the battery cells and then construct the battery box from the battery module]. Relatively speaking, 68S is more practical (17S×4, 2 rows and 2 lines, such as Figure 10 As shown; or 2 34S are grouped according to CTP); (4) Therefore, 544S=68S×8, 408S=68S×6; that is, 2000V voltage can be obtained by connecting 8 1P68S battery boxes in series, and 1500V voltage can be obtained by connecting 6 1P68S battery boxes in series; (5) The least common multiple of the integers 8 and 6 is 24, and considering the overall product dimensions and other factors, the layout design is based on a 10-foot container: the 2000V system configuration is 1P68S×8×3, and the 1500V system configuration is 1P68S×6×4, both of which are composed of 24 1P68S battery boxes [Note: 1P68S refers to the battery box (battery pack) configuration, which means 1 in parallel and 68 in series; the middle number represents the number of the aforementioned battery modules contained in a single battery cluster; the last number represents the number of battery clusters in the energy storage system].

[0155] 2. Based on the above configuration, use a parameterized energy storage system integrated control method (i.e., system-level to cell-level sizing reasoning logic) to deduce the energy storage system construction; thereby conducting energy storage system layout design and further detailed design.

[0156] The design process described above is based on a 10-foot container, ensuring manageable overall size and weight (typically no more than 25 tons). This eliminates restrictions such as the transport of oversized or overweight hazardous materials, facilitating overall transportation and enabling flexible installation and deployment at the project site. Furthermore, the battery cluster high-voltage boxes are centrally located in the electrical compartment, improving height and dimensional efficiency. The height h of the battery cells, including the poles, and the container height H can be designed to satisfy the following relationship: 0.09 ≥ h / H ≥ 0.07. Furthermore, since lithium-ion batteries expand and contract repeatedly during charging and discharging, their expansion increases towards the end of their lifespan, generating greater expansion forces. This expansion force factor can be factored into the design of traditional bundled modules (allowing for space for shock absorption and insulation). The designed battery cell thickness d and the container width W satisfy the following relationship: 0.03 ≥ d / W ≥ 0.02.

[0157] In addition, by changing the connection method between battery modules, compatibility with multiple system upper voltage levels such as 1500V and 2000V is achieved. Therefore, energy storage systems built under various voltage limits have a large number of shared materials, such as modules, liquid cooling systems, fire protection systems, containers, etc. This is extremely beneficial to product standardization and cost reduction, and can also be used for customized configuration upgrades based on customer needs.

[0158] Furthermore, unlike most mainstream large-capacity energy storage systems designed for standard 20-foot containers, the above process can be designed for standard 10-foot containers, making pre-shipment transfer within the factory and on-site hoisting easy without the need for oversized lifting equipment. Product dimensions include, but are not limited to, the following ranges (length L, width W, height H, all in mm): 3500 ≥ L ≥ 1000, 2600 ≥ W ≥ 1000, and 3500 ≥ H ≥ 2000. Energy storage systems built based on this solution support both 1500V and 2000V, with identical dimensions. This provides diverse options while meeting end-customer expectations for product upgrades. The solution is suitable for a variety of scenarios, including large-scale power storage, industrial and commercial energy storage, and can even replace some large-capacity outdoor energy storage cabinets. Furthermore, the benefits of the DC side voltage upgrade are obvious, including improvements in energy density, power density, cycle efficiency, and system efficiency, as well as a reduction in the overall cost per kilowatt-hour (COE) over the entire lifecycle of the energy storage system.

[0159] In the embodiments of this application, a method is described for analyzing dimensional constraint data and the number of battery boxes using the number of battery boxes as an analysis parameter based on a dimensional generation model to infer the cell dimensional data of the battery cells. The dimensional generation model is used to estimate and analyze the dimensional conditions during the energy storage system construction process, so that the energy storage system can be constructed more accurately and efficiently by integrating dimensional data and the number of components (number of cells, number of battery boxes), thereby improving the success rate of energy storage system construction and the accuracy of application. Furthermore, a derivation method is used to introduce an excellent compatibility solution for energy storage systems that adapt to at least two system upper voltage limits. The solution can be designed based on a standard 10-foot container, making the overall size and weight controllable, facilitating overall transportation and flexible project installation and deployment. The size and space utilization of the container in both height and width directions are also improved, making container transshipment convenient and eliminating the need for oversized lifting equipment, thereby improving the utilization rate of the energy storage system.

[0160] In an optional embodiment, the energy storage system constructed based on the above-mentioned energy storage system construction method is described as follows.

[0161] The energy storage system includes: battery boxes corresponding to the number of battery boxes. A battery box is constructed from a first number of battery cells, the first number of battery cells being determined based on a common factor of at least two numbers of battery cells, the at least two numbers of battery cells being determined based on the cell voltages of the battery cells and at least two system upper limit voltages, the i-th system upper limit voltage corresponding to the i-th number of battery cells, and i being a positive integer. The at least two system upper limit voltages are at least two voltage upper limits compatible with a preset energy storage system, and the cell voltage is the voltage of the battery cells used to construct the energy storage system. The energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection methods.

[0162] In some embodiments, a single battery box corresponds to a battery box voltage, and the battery box voltage is determined based on the first battery cell number and the battery cell voltage; wherein, the number of battery boxes is determined based on the number of system battery boxes corresponding to at least two system upper limit voltages, and the number of system battery boxes corresponding to at least two system upper limit voltages is determined based on the quotient of at least two system upper limit voltages and the battery box voltage, and the kth system battery box number is used to characterize the minimum number of battery boxes in the energy storage system that supports the kth system upper limit voltage, and k is a positive integer.

[0163] In some embodiments, the number of battery boxes is a common multiple of the number of system battery boxes corresponding to at least two system upper limit voltages.

[0164] Schematically, at least two system upper limit voltages include a first system upper limit voltage and a second system upper limit voltage, the first system upper limit voltage corresponds to the number of first system battery boxes, and the second system upper limit voltage corresponds to the number of second system battery boxes; the common multiple between the number of first system battery boxes and the second system battery boxes is obtained as the number of battery boxes used to construct the energy storage system.

[0165] In some embodiments, the first number of battery cells is the greatest common factor of at least two numbers of battery cells.

[0166] In some embodiments, a battery module having a module number, a single battery module includes a second number of battery cells, the battery module is used to construct a battery box, the second number of battery cells is the greatest common factor of at least two numbers of battery cells, and the first number of battery cells is the product of the second number of battery cells and the number of modules.

[0167] In some embodiments, when the energy storage system supports a first system upper limit voltage, a first number of battery boxes of the first system battery box is connected in series to obtain a first number of first battery clusters in parallel. The first system battery box number is the quotient of the first system upper limit voltage and the battery box voltage; the first parallel number is the quotient of the number of battery boxes and the first system battery box number, and the at least two system upper limit voltages include the second system upper limit voltage. Illustratively, the first parallel number is the number of battery clusters determined under the first system upper limit voltage, and the first system battery box number is the number of battery boxes in a single battery cluster determined under the first system upper limit voltage, thereby flexibly determining the battery cluster division of the energy storage system when supporting the first system upper limit voltage.

[0168] In some embodiments, when the energy storage system supports a second system upper limit voltage, a second number of battery boxes are connected in series to obtain a second number of second battery clusters in parallel. The second system battery box number is the quotient of the second system upper limit voltage and the battery box voltage; the second parallel number is the quotient of the battery box number and the second system battery box number, and at least two system upper limit voltages include the second system upper limit voltage. Illustratively, the second parallel number is the number of battery clusters determined under the second system upper limit voltage, and the second system battery box number is the number of battery boxes in a single battery cluster determined under the second system upper limit voltage, thereby flexibly determining the battery cluster division of the energy storage system when supporting the second system upper limit voltage.

[0169] It is worth noting that the above energy storage system is only an illustrative example, and the relevant content can be referred to the above embodiment, which will not be elaborated here.

[0170] Figure 12 This is a structural block diagram of a construction device for an energy storage system provided by an exemplary embodiment of the present application. Figure 12As shown, the device includes the following parts:

[0171] An acquisition module 1210 is configured to acquire a cell voltage and at least two system upper limit voltages, where the at least two system upper limit voltages are at least two preset voltage upper limits compatible with the energy storage system, and the cell voltage is the voltage of a battery cell used to construct the energy storage system;

[0172] The acquisition module 1210 is further configured to determine, based on the cell voltage, the number of cells corresponding to the at least two system upper limit voltages, respectively, to obtain at least two cell numbers, where the i-th system upper limit voltage corresponds to the i-th cell number, and i is a positive integer;

[0173] a determination module 1220 configured to determine a common factor of the at least two battery cell quantities, and determine a first battery cell quantity of the battery cells used to construct a battery box based on the common factor;

[0174] Construction module 1230 is used to determine the number of battery boxes of the battery box based on the first number of battery cells, and construct the energy storage system according to the number of battery boxes, wherein the energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection methods.

[0175] In an optional embodiment, the construction module 1230 is further used to determine the battery box voltage of a single battery box composed of the first number of battery cells; determine the quotient of the at least two system upper limit voltages and the battery box voltage, and obtain the number of system battery boxes corresponding to the at least two system upper limit voltages, wherein the kth number of system battery boxes is used to characterize the minimum number of battery boxes in the energy storage system that supports the kth system upper limit voltage, and k is a positive integer; based on the number of system battery boxes corresponding to the at least two system upper limit voltages, obtain the number of battery boxes in the energy storage system that is compatible with the at least two system upper limit voltages.

[0176] In an optional embodiment, the construction module 1230 is further configured to obtain a common multiple of the number of system battery boxes corresponding to the at least two system upper limit voltages, as the number of battery boxes used to construct the energy storage system.

[0177] In an optional embodiment, the determining module 1220 is further configured to use the greatest common factor of the at least two battery cell quantities as the first battery cell quantity of the battery cells used to construct the battery box.

[0178] In an optional embodiment, the determination module 1220 is further used to use the greatest common divisor of the at least two battery cell quantities as the second battery cell quantity for constructing a single battery module; based on the second battery cell quantity, the module quantity of the battery module for constructing a single battery box is obtained; wherein the first battery cell quantity is the product of the second battery cell quantity and the module quantity.

[0179] In an optional embodiment, the determination module 1220 is further configured to determine the quotients of the at least two system upper limit voltages and the cell voltage, respectively, to obtain the number of cells corresponding to the at least two system upper limit voltages.

[0180] In an optional embodiment, the at least two system upper limit voltages include a first system upper limit voltage and a second system upper limit voltage;

[0181] The building module 1230 is further configured to connect the first number of battery cells in series to obtain a single battery box, and to obtain the first number of battery boxes;

[0182] The determination module 1220 is also used to determine the quotient of the first system upper limit voltage and the battery box voltage to obtain the number of first system battery boxes corresponding to the first system upper limit voltage; based on the number of first system battery boxes and the number of battery boxes, connect the battery boxes of the number of battery boxes in a first connection method to obtain the energy storage system that supports the first system upper limit voltage; or, determine the quotient of the second system upper limit voltage and the battery box voltage to obtain the number of second system battery boxes corresponding to the second system upper limit voltage; based on the number of second system battery boxes and the number of battery boxes, connect the battery boxes of the number of battery boxes in a second connection method to obtain the energy storage system that supports the second system upper limit voltage.

[0183] In an optional embodiment, the determination module 1220 is further used to obtain the quotient of the number of battery boxes and the number of battery boxes of the first system to obtain a first parallel number; connect the battery boxes of the first system battery box number in series to obtain the first parallel number of first battery clusters; connect the first parallel number of first battery clusters in parallel to obtain the energy storage system that supports the first system upper limit voltage.

[0184] In an optional embodiment, the determination module 1220 is further used to obtain the quotient of the number of battery boxes and the number of battery boxes of the second system to obtain a second parallel number; connect the battery boxes of the second system number of battery boxes in series to obtain the second parallel number of second battery clusters; connect the second parallel number of second battery clusters in parallel to obtain the energy storage system that supports the second system upper limit voltage.

[0185] In an optional embodiment, the construction module 1230 is further used to obtain size constraint data of the energy storage system, the size constraint data is used to constrain the array arrangement of at least one component in the energy storage system from a size dimension; the size constraint data and the number of battery boxes are analyzed by a size generation model to obtain battery box size data of a single battery box in the energy storage system, the size generation model is a trained mathematical model, and the size generation model learns the association between the size constraint data and the size data of at least one component during the training process; the battery box size data and the first number of battery cells are analyzed by the size generation model to obtain cell size data of a single battery cell in the energy storage system; under the constraints of the cell size data and the battery box size data, the energy storage system is constructed using the first battery box of the number of battery boxes.

[0186] It should be noted that the energy storage system construction device provided in the above embodiment is merely exemplified by the division of the above-mentioned functional modules. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the energy storage system construction device provided in the above embodiment and the energy storage system construction method embodiment are based on the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0187] Figure 13A schematic diagram of the structure of a server provided by an exemplary embodiment of the present application is shown. Specifically, the server 1300 includes a central processing unit (CPU) 1301, a system memory 1304 including a random access memory (RAM) 1302 and a read-only memory (ROM) 1303, and a system bus 1305 connecting the system memory 1304 and the CPU 1301. Server 1300 also includes a mass storage device 1306 for storing an operating system 1313, application programs 1314, and other program modules 1315. Mass storage device 1306 is connected to the CPU 1301 via a mass storage controller (not shown) connected to system bus 1305. Mass storage device 1306 and its associated computer-readable media provide non-volatile storage for server 1300. Without loss of generality, computer-readable media may include computer storage media and communication media. Computer storage media include volatile and non-volatile, removable and non-removable media implemented by any method or technology for storing information such as computer-readable instructions, data structures, program modules or other data. The above-mentioned system memory 1304 and mass storage device 1306 can be collectively referred to as memory. According to various embodiments of the present application, the server 1300 can also be connected to a remote computer on the network through a network such as the Internet for operation. That is, the server 1300 can be connected to the network 1312 through the network interface unit 1311 connected to the system bus 1305. The above-mentioned memory also includes one or more programs, one or more programs stored in the memory and configured to be executed by the CPU.

[0188] Optionally, the computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), solid-state drive (SSD) or optical disk, etc. Among them, the random access memory may include resistance random access memory (ReRAM) and dynamic random access memory (DRAM). The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments. Those skilled in the art will understand that all or part of the steps of implementing the above-mentioned embodiments can be completed by hardware, or by a program to instruct the relevant hardware to complete. The program can be stored in a computer-readable storage medium, and the above-mentioned storage medium can be a read-only memory, a magnetic disk or an optical disk, etc. The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for constructing an energy storage system, characterized in that: The method comprises: Obtaining a cell voltage and at least two system upper limit voltages, where the at least two system upper limit voltages are at least two preset voltage upper limits compatible with the energy storage system, and the cell voltage is the voltage of a battery cell used to construct the energy storage system; Determine, based on the cell voltage, the number of cells corresponding to the at least two system upper limit voltages, respectively, to obtain at least two numbers of cells, wherein the i-th system upper limit voltage corresponds to the i-th number of cells, and i is a positive integer; determining a common factor of the at least two battery cell quantities, and determining a first battery cell quantity of the battery cells for constructing a battery box based on the common factor; The number of battery boxes of the battery box is determined based on the first number of battery cells, and the energy storage system is constructed according to the number of battery boxes, wherein the energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection modes.

2. The method according to claim 1, characterized in that The determining the number of battery boxes in the battery box based on the first number of battery cells includes: determining a battery pack voltage of a single battery pack consisting of the first number of battery cells; Determining the quotients of the at least two system upper limit voltages and the battery box voltage, respectively, to obtain the number of system battery boxes corresponding to the at least two system upper limit voltages, respectively, wherein the kth number of system battery boxes is used to represent the minimum number of battery boxes in the energy storage system that supports the kth system upper limit voltage, and k is a positive integer; Based on the numbers of system battery boxes corresponding to the at least two system upper limit voltages, the number of battery boxes in the energy storage system that is compatible with the at least two system upper limit voltages is obtained.

3. The method according to claim 2, characterized in that The acquiring, based on the numbers of system battery boxes corresponding to the at least two system upper limit voltages, the number of battery boxes in the energy storage system that are compatible with the at least two system upper limit voltages, includes: A common multiple of the number of system battery boxes corresponding to the at least two system upper limit voltages is obtained as the number of battery boxes used to construct the energy storage system.

4. The method according to any one of claims 1 to 3, characterized in that: The determining, based on the common factor, a first number of battery cells for constructing the battery box, includes: The greatest common factor of the at least two battery cell quantities is used as the first battery cell quantity of the battery cells used to construct the battery box.

5. The method according to any one of claims 1 to 3, characterized in that: The determining, based on the common factor, a first number of battery cells for constructing the battery box, includes: Using the greatest common factor of the at least two battery cell quantities as the second battery cell quantity for constructing the single battery module; The number of modules of the battery module used to construct a single battery box is obtained based on the second number of battery cells; wherein the first number of battery cells is the product of the second number of battery cells and the number of modules.

6. The method according to any one of claims 1 to 3, characterized in that: The determining, based on the cell voltage, the number of cells corresponding to the at least two system upper limit voltages, respectively, includes: The quotients of the at least two system upper limit voltages and the cell voltage are determined to obtain the number of cells corresponding to the at least two system upper limit voltages.

7. The method according to any one of claims 1 to 3, characterized in that: The at least two system upper limit voltages include a first system upper limit voltage and a second system upper limit voltage; The energy storage system is constructed according to the number of battery boxes, including: Connecting the first number of battery cells in series to obtain a single battery box, and obtaining the first number of battery boxes; determining a battery pack voltage of a single battery pack consisting of the first number of battery cells; Determine the quotient of the first system upper limit voltage and the battery box voltage to obtain the number of first system battery boxes corresponding to the first system upper limit voltage; based on the number of the first system battery boxes and the number of battery boxes, connect the number of battery boxes in a first connection manner to obtain the energy storage system that supports the first system upper limit voltage; or Determine the quotient of the second system upper limit voltage and the battery box voltage to obtain the number of second system battery boxes corresponding to the second system upper limit voltage; based on the number of second system battery boxes and the number of battery boxes, connect the battery boxes of the number of battery boxes in a second connection method to obtain the energy storage system that supports the second system upper limit voltage.

8. The method according to claim 7, characterized in that The method of connecting the battery boxes of the number of battery boxes in a first connection manner based on the number of battery boxes in the first system and the number of battery boxes to obtain the energy storage system supporting the upper limit voltage of the first system includes: Obtaining the quotient of the number of battery boxes and the number of battery boxes of the first system to obtain a first parallel quantity; Connecting the first number of battery boxes of the system in series to obtain the first number of first battery clusters in parallel; The first parallel number of first battery clusters are connected in parallel to obtain the energy storage system that supports the first system upper limit voltage.

9. The method according to claim 7, characterized in that The method of connecting the battery boxes of the number of battery boxes in the second system and the number of battery boxes in a second connection manner to obtain the energy storage system supporting the upper limit voltage of the second system includes: Obtaining the quotient of the number of battery boxes and the number of battery boxes of the second system to obtain a second parallel quantity; connecting the second number of battery boxes of the system in series to obtain the second number of second battery clusters in parallel; The second number of second battery clusters connected in parallel is connected in parallel to obtain the energy storage system that supports the second system upper limit voltage.

10. The method according to any one of claims 1 to 3, characterized in that: The energy storage system is constructed according to the number of battery boxes, including: Acquiring size constraint data of the energy storage system, where the size constraint data is used to constrain an array arrangement of at least one component in the energy storage system from a size dimension; Analyzing the size constraint data and the number of battery boxes using a size generation model to obtain battery box size data of a single battery box in the energy storage system, wherein the size generation model is a trained mathematical model that learns an association between the size constraint data and size data of at least one component during a training process; Analyzing the battery box size data and the first number of battery cells through a size generation model to obtain battery cell size data of a single battery cell in the energy storage system; Under the constraints of the battery cell size data and the battery box size data, the energy storage system is constructed using the first battery box with the number of battery boxes.

11. An energy storage system, characterized in that: The system comprises: A battery box corresponding to a number of battery boxes; wherein one battery box is constructed from a first number of battery cells, the first number of battery cells is determined based on a common factor of at least two numbers of battery cells, the at least two numbers of battery cells are obtained based on the cell voltages of the battery cells and at least two system upper limit voltages, the i-th system upper limit voltage corresponds to the i-th number of battery cells, and i is a positive integer; Among them, the at least two system upper limit voltages are at least two preset voltage upper limits compatible with the energy storage system, and the cell voltage is the voltage of the battery cell used to construct the energy storage system; the energy storage system supports different system upper limit voltages when the battery boxes of the number of battery boxes are connected in different connection methods.

12. The system according to claim 11, wherein: A battery box voltage corresponding to a single battery box, wherein the battery box voltage is determined based on the first number of battery cells and the battery cell voltage; Among them, the number of battery boxes is determined based on the number of system battery boxes corresponding to the at least two system upper limit voltages, and the number of system battery boxes corresponding to the at least two system upper limit voltages is determined based on the quotient of the at least two system upper limit voltages and the battery box voltage. The kth number of system battery boxes is used to represent the minimum number of battery boxes in the energy storage system that supports the kth system upper limit voltage, and k is a positive integer.

13. The system according to claim 12, wherein: The number of battery boxes is a common multiple of the number of system battery boxes corresponding to the at least two system upper limit voltages.

14. The system according to any one of claims 11 to 13, characterized in that: The first number of battery cells is the greatest common factor of the numbers of the at least two battery cells.

15. The system according to any one of claims 11 to 13, characterized in that: The system further comprises: A battery module corresponding to the number of modules, a single battery module includes a second number of battery cells, the battery module is used to construct the battery box, the second number of battery cells is the greatest common factor of the at least two numbers of battery cells, and the first number of battery cells is the product of the second number of battery cells and the number of modules.

16. The system according to any one of claims 11 to 13, characterized in that: When the energy storage system supports a first system upper limit voltage, battery boxes of the first system battery box quantity are connected in series to obtain a first parallel quantity of first battery clusters, wherein the first system battery box quantity is the quotient of the first system upper limit voltage and the battery box voltage; the first parallel quantity is the quotient of the battery box quantity and the first system battery box quantity, and the at least two system upper limit voltages include the first system upper limit voltage.

17. The system according to any one of claims 11 to 13, characterized in that: When the energy storage system supports a second system upper limit voltage, a second number of battery boxes of the system are connected in series to obtain a second number of second battery clusters in parallel, wherein the second number of battery boxes is the quotient of the second system upper limit voltage and the battery box voltage; the second parallel number is the quotient of the number of battery boxes and the second number of battery boxes of the system, and the at least two system upper limit voltages include the second system upper limit voltage.

18. A device for constructing an energy storage system, characterized in that: The device comprises: an acquisition module, configured to acquire a cell voltage and at least two system upper limit voltages, wherein the at least two system upper limit voltages are at least two preset voltage upper limits compatible with the energy storage system, and the cell voltage is the voltage of a battery cell used to construct the energy storage system; The acquisition module is further configured to determine, based on the cell voltage, the number of cells corresponding to the at least two system upper limit voltages, respectively, to obtain at least two cell quantities, wherein the i-th system upper limit voltage corresponds to the i-th cell quantity, and i is a positive integer; a determination module, configured to determine a common factor of the at least two battery cell quantities, and determine a first battery cell quantity of the battery cells used to construct a battery box based on the common factor; A construction module is used to determine the number of battery boxes of the battery box based on the first number of battery cells, and to construct the energy storage system according to the number of battery boxes, wherein the energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection methods.

19. A computer device, characterized in that: The computer device includes a processor and a memory, wherein the memory stores at least one program, and the at least one program is loaded and executed by the processor to implement the method for constructing the energy storage system according to any one of claims 1 to 10.

20. A computer-readable storage medium, characterized in that The storage medium stores at least one program, and the at least one program is loaded and executed by the processor to implement the method for constructing the energy storage system according to any one of claims 1 to 10.

21. A computer program product, characterized in that The method comprises computer instructions, which, when executed by a processor, implements the method for constructing an energy storage system according to any one of claims 1 to 10.

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