Energy storage system construction method, system, device, equipment, medium and product

Abstract

The invention discloses a construction method, system, device and equipment of an energy storage system, a medium and a product, and relates to the field of battery preparation. The method comprises the following steps: acquiring a cell voltage and at least two system upper limit voltages; determining battery cell numbers corresponding to the at least two system upper limit voltages based on the battery cell voltages to obtain at least two battery cell numbers; determining a common factor of the at least two battery cell numbers, and determining a first battery cell number of battery cells used for constructing the battery box based on the common factor; and determining the number of the battery boxes based on the first battery cell number, and constructing the energy storage system according to the number of the battery boxes. The energy storage system is constructed through the battery boxes with the number of the battery boxes obtained through analysis of the at least two system upper limit voltages, the energy storage system can support different system upper limit voltages only by adopting different connection modes for the battery boxes, and the pertinence and compatibility of the system construction process are enhanced. The method can be applied to various battery preparation scenes.

Description

Technical Field

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

[0002] With the development of computer technology, energy storage systems have played a huge role in multiple fields, and power energy is relied on energy storage systems in various scenarios.

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

[0004] Although the preset pressure upper limit ensures the safety of the energy storage system during operation, the preset pressure after the energy storage system is constructed is fixed and cannot flexibly adapt to the process of voltage upgrade and change, which restricts the application scenarios of the energy storage system. Summary of the Invention

[0005] The embodiments of the present application provide a construction method, system, device, equipment, medium and product of an energy storage system. An energy storage system is constructed by battery boxes with the number of battery boxes obtained by analyzing at least two system upper limit voltages. By simply adopting different connection methods for the battery boxes, the energy storage system can support different system upper limit voltages, strengthening the pertinence and compatibility of the system construction process. The technical solutions are as follows.

[0006] On the one hand, a construction method of an energy storage system is provided, and the method includes: Obtain the cell voltage and at least two system upper limit voltages, where the at least two system upper limit voltages are at least two voltage upper limits preset for the energy storage system to be compatible with, and the cell voltage is the voltage of the battery cells used to construct the energy storage system; Based on the cell voltage, determine the number of cells corresponding to the at least two system upper limit voltages respectively, and obtain at least two numbers of cells. Among them, the i-th system upper limit voltage corresponds to the i-th number of cells, and i is a positive integer; Determine the common factor of the at least two numbers of cells, and based on the common factor, determine the first number of cells of the battery cells used to construct the battery box; Based on the first number of cells, determine the number of battery boxes of the battery box, and construct the energy storage system according to the number of battery boxes. Among them, the energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection methods.

[0007] On the other hand, an energy storage system is provided, and the system includes: Battery boxes corresponding to the number of battery boxes; wherein, one battery box is constructed by battery cells with the number of the first battery cells, and the number of the first battery cells is determined based on the greatest common divisor of at least two numbers of battery cells, the at least two numbers of battery cells are obtained based on the cell voltage 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; Wherein, the at least two system upper limit voltages are at least two voltage upper limits preset for compatibility with the 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 with the number of battery boxes are connected in different connection manners.

[0008] On the other hand, a device for constructing an energy storage system is provided, and the device includes: An acquisition module, configured to acquire the cell voltage and at least two system upper limit voltages, where the at least two system upper limit voltages are at least two voltage upper limits preset for compatibility with the energy storage system, and the cell voltage is the voltage of the battery cells used to construct the energy storage system; The acquisition module is further configured to determine the number of battery cells corresponding to the at least two system upper limit voltages respectively based on the cell voltage, so as to obtain at least two numbers of battery cells, wherein the i-th system upper limit voltage corresponds to the i-th number of battery cells, and i is a positive integer; A determination module, configured to determine the greatest common divisor of the at least two numbers of battery cells, and determine the number of the first battery cells of the battery cells used to construct the battery box based on the greatest common divisor; A construction module, configured to determine the number of battery boxes of the battery box based on the number of the first 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 manners.

[0009] On the other hand, a computer device is provided, and the computer device includes a processor and a memory, and at least one instruction, at least one program, a code set or an instruction set is stored in the memory, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the method for constructing an energy storage system as described in any one of the embodiments of the present application. Optionally, the computer device may be a terminal or a server.

[0010] On the other hand, a computer-readable storage medium is provided, and at least one instruction, at least one program, a code set or an instruction set is stored in the storage medium, 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 the method for constructing an energy storage system as described in any one of the embodiments of the present application.

[0011] On the other hand, a computer program product or a computer program is provided. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the method for constructing an energy storage system described in any one of the above embodiments.

[0012] The beneficial effects brought by the technical solutions provided in the embodiments of the present application at least include: In the process of constructing an energy storage system, according to the cell voltage of the battery cells adopted, the number of battery cells corresponding to at least two system upper limit voltages preset for the energy storage system is determined. Then, according to the common divisor of the at least two numbers of battery cells, the first number of battery cells of the battery cells adopted is determined. Furthermore, the energy storage system is constructed 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, battery boxes with the number of battery boxes that can simultaneously meet at least two system upper limit voltages are obtained. Thus, an energy storage system that can be applied to at least two system upper limit voltage scenarios is constructed by using battery boxes with the number of battery boxes. Only by adopting different connection methods for the battery boxes can the energy storage system support different system upper limit voltages, strengthening 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 the rapid scenario switching of the constructed energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a structural block diagram of a construction system provided by an exemplary embodiment of the present application; Figure 2 is a flowchart of a method for constructing an energy storage system provided by an exemplary embodiment of the present application; Figure 3 is a flowchart of a method for constructing an energy storage system provided by another exemplary embodiment of the present application; Figure 4 is a flowchart of a method for constructing an energy storage system provided by still another exemplary embodiment of the present application; Figure 5 is a schematic diagram of the connection of battery boxes when the energy storage system provided by an exemplary embodiment of the present application supports the first system upper limit voltage; Figure 6 is a schematic diagram of the connection of battery boxes when the energy storage system provided by an exemplary embodiment of the present application supports the second system upper limit voltage; Figure 7 is a schematic diagram for determining the number of modules provided by an exemplary embodiment of the present application; Figure 8It is a schematic diagram of constructing an energy storage system based on the construction method of an energy storage system provided by an exemplary embodiment of the present application; Figure 9 It is a front view of constructing an energy storage system using the first battery box with the number of battery boxes under the constraint of size data provided by an exemplary embodiment of the present application; Figure 10 It is a top view of constructing an energy storage system using the first battery box with the number of battery boxes under the constraint of size data provided by an exemplary embodiment of the present application; Figure 11 It is a schematic diagram of the arrangement method from battery cells to an energy storage system provided by an exemplary embodiment of the present application; Figure 12 It is a structural block diagram of a construction device for an energy storage system provided by another exemplary embodiment of the present application; Figure 13 It is a structural block diagram of a server provided by an exemplary embodiment of the present application. Detailed implementation manners

[0014] To make the objectives, technical solutions, and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0015] First, a brief introduction to the nouns involved in the embodiments of the present application is given.

[0016] Energy Storage System (ESS): An energy storage system is a system used to store and release electrical energy, usually including batteries, control systems, inverters, and other related components. An energy storage system can store electricity, balance power supply and demand, provide backup power, and support the stability of the power grid.

[0017] Battery Management System (BMS): It is the core component responsible for management in an energy storage system, and can manage the charging and discharging process, temperature, capacity, and other states of battery boxes or battery modules to ensure that the energy storage system operates in a safe and efficient state. The battery management system is usually divided into a multi-layer architecture. Taking large-scale energy storage (an energy storage system for storing a large amount of electrical energy and supporting the operation of the power grid) as an example, the third-level Battery Management Unit (BMU) is inside the battery box, the second-level BMS is in the mailbox (cabinet), and the first-level Battery Aggregator (BA) is usually placed in the busbar cabinet.

[0018] In the embodiments of the present application, the method for constructing an 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 herein. It should be noted that the information (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 involved in the present application 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 in the relevant regions. For example, the system upper limit voltage, cell voltage, etc. involved in the present application are obtained under full authorization.

[0019] The construction system involved in the embodiments of the present application will be described. The method for constructing the energy storage system provided in the embodiments of the present application can be implemented by the terminal alone, or by the server, or by data interaction between the terminal and the server. The embodiments of the present application do not limit this. Optionally, the method for constructing the energy storage system by the interaction between the terminal and the server will be described as an example.

[0020] Schematically, please refer to Figure 1 , in which the construction system involves a terminal 110 and a server 120, and the terminal 110 and the server 120 are connected through a communication network 130.

[0021] In some embodiments, the terminal 110 is installed with a system design application program. When the system design application program is running, a plurality of voltage filling boxes are displayed. By filling in the corresponding values in the voltage filling boxes, the system upper limit voltage and cell voltage considered when constructing the energy storage system are determined.

[0022] Optionally, during the process of displaying the voltage filling box, the terminal 110 receives a numerical filling operation for the system upper limit voltage and the cell voltage 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. Schematically, it is desired 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: among the multiple voltage filling boxes, there are 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, if it is determined that the filled values include 1500V and 2000V, then two system upper limit voltages are obtained; in addition, among the multiple voltage filling boxes, there is a cell voltage filling column. Based on the numerical filling operation for the cell voltage filling column, if it is determined that the filled value is 3.65V, then the cell voltage is obtained.

[0023] In some embodiments, based on the cell voltage, the number of cells corresponding to at least two system upper limit voltages is determined respectively to obtain at least two cell numbers. Among them, the i-th system upper limit voltage corresponds to the i-th cell number, 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; 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 is determined, that is, the i-th cell number; the number of cells corresponding to at least two system upper limit voltages is obtained respectively by this method.

[0024] In some embodiments, the common divisor of at least two cell numbers is determined, and based on the common divisor, the first cell number of the battery cells used to construct the battery box is determined. Schematically, after obtaining at least two cell numbers, the common divisor of at least two cell numbers is analyzed, that is, at least one value that can be divided by at least two cell numbers is determined; then during the process of constructing the battery box with battery cells, based on the common divisor, the number of battery cells used to construct the battery box is determined, that is, the first cell number is determined. For example, if the common divisor of at least two cell numbers is 17, and 17 battery cells are used to form a battery box, then the first cell number is 17; or, if the common divisor of at least two cell numbers is 17, an integer multiple 68 of 17 is obtained, and 68 battery cells are used to form a battery box, etc., then the first cell number is 68, etc., which is not limited here.

[0025] In some embodiments, the number of battery boxes of the energy storage system is determined based on the number of first battery cells, and the energy storage system is constructed according to the number of battery boxes. Schematically, the battery cells with the number of first battery cells can construct one battery box. By integrating the number of first battery cells and the number of at least two battery cells, the number of battery boxes in the energy storage system is determined if it supports at least two system upper limit voltages, so as to construct the energy storage system with the battery boxes of the number of battery boxes. Among them, the energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection manners. For example, when supporting a certain system upper limit voltage, while keeping the number of battery boxes in the energy storage system unchanged, based on the voltage supported by each battery box, multiple battery boxes are connected in one connection manner so that the energy storage system supports this system upper limit voltage; when supporting another system upper limit voltage, while keeping the number of battery boxes in the energy storage system unchanged, based on the voltage supported by each battery box, multiple battery boxes are connected in another connection manner so that the energy storage system supports this system upper limit voltage, etc. For example, based on the principle that the series voltage is added and the parallel voltage is equal, by adjusting the series and parallel conditions of the battery boxes, the purpose of supporting different system upper limit voltages in different connection manners while keeping the number of battery boxes unchanged can be achieved.

[0026] In some embodiments, the terminal 110 sends the obtained battery cell voltage and at least two system upper limit voltages to the server 120 through the communication network 130, so that the server 120 determines the number of battery cells corresponding to at least two system upper limit voltages respectively based on the battery cell voltage, determines the number of first battery cells of the battery cells used to construct the battery box, and determines the number of battery boxes of the battery box based on the number of first battery cells, etc.; the server 120 can send the number of battery boxes to the terminal 110 through the communication network 130, so that the terminal 110 constructs the energy storage system according to the number of battery boxes, etc. For example, the terminal 110 renders and displays a schematic diagram of the energy storage system in which the battery boxes have no link relationship in the interface corresponding to the system design application based on the number of battery boxes; then, if one system upper limit voltage is selected from at least two system upper limit voltages, multiple battery boxes in the energy storage system are connected in one connection manner based on this system upper limit voltage, so as to facilitate the system designer to understand the primary architecture 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 manner based on this system upper limit voltage, etc., which is not limited here. The above terminal includes but is not limited to mobile terminals such as mobile phones, tablet computers, portable laptop computers, intelligent voice interaction devices, and intelligent home appliances, and can also be implemented as a desktop computer, etc.; the above server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server.

[0027] Combined with the above noun introduction and application scenarios, the construction method of the energy storage system provided by this application will be described. Taking the application of this method to a terminal as an example, such as Figure 2 As shown, this method includes the following steps 210 to 240.

[0028] Step 210, obtain the cell voltage and at least two system upper limit voltages.

[0029] Optionally, the cell voltage and at least two system upper limit voltages are pre-determined values before constructing the energy storage system. 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: the upper limit voltage of a lithium iron phosphate battery ( ) is usually 3.65V, the upper limit voltage of a lithium-ion battery is usually 4.2V, the upper limit voltage of a lead-acid battery is usually 2.4V, etc., which are not limited here. Optionally, the cell voltage is the safety voltage of the battery cell used to construct the energy storage system. The safety voltage range is usually used to characterize the voltage range in which the battery cell can work safely during charging or discharging. The safety voltage represents a preset value or any value within the voltage range indicated by the safety voltage; for example, the charging safety voltage range of a lithium battery is generally between 3.0V and 4.2V, and the safety range of the discharge voltage may be 3.0V to 3.7V. The safety voltage is selected as 3.6V (within both 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 safety working upper limit during the charging process of the energy storage system. Schematically, at least two system voltages are system upper limit voltages with different values, such as one system upper limit voltage is 1500V and another system upper limit voltage is 2000V; or, one system upper limit voltage is 1800V, another system upper limit voltage is 2000V, and another system upper limit voltage is 2500V, etc., which are not limited here. The purpose of setting at least two system voltages is to hope that the constructed energy storage system can efficiently switch to different working 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 working state and can support a system upper limit voltage of 2000V in another working state, etc., which helps the constructed energy storage system to support more application scenarios of system upper limit voltages.

[0030] In some embodiments, the cell voltage and at least two system upper limit voltages are values filled in by system developers and are used to guide the construction process of the energy storage system. Optionally, during the process of constructing the energy storage system, the system architecture of the energy storage system is determined with the aid of a terminal. The terminal is installed with a system design application program. When the system design application program is running, a plurality of voltage filling boxes are displayed. By filling in the corresponding values in the voltage filling boxes, the system upper limit voltages and the cell voltage considered when constructing the energy storage system are determined.

[0031] Step 220: Based on the cell voltage, determine the number of cells corresponding to at least two system upper limit voltages respectively, to obtain at least two cell numbers.

[0032] Among them, the i-th system upper limit voltage corresponds to the i-th cell number, 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 cell voltage, determine the number of cells corresponding to the i-th system upper limit voltage as the i-th cell number; similarly, determine the number of cells corresponding to at least two system upper limit voltages respectively. Optionally, since the i-th system upper limit voltage represents the maximum supported voltage upper limit and the cell voltage is the voltage of the battery cells used when constructing the energy storage system, the quotient of the i-th system upper limit voltage and the cell voltage is used as the i-th cell number 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, then the obtained 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 the i-th cell number is 546, or the i-th cell number is 544, etc., which is not limited here. Among them, the i-th system upper limit voltage corresponding to the i-th cell number means that at least the i-th cell number of battery cells are required to construct 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, it means that at least 546 battery cells are required to construct an energy storage system that supports 1500V, etc., which is not limited here.

[0033] Step 230: Determine the common factors of at least two cell numbers, and based on the common factors, determine the first cell number of the battery cells used to construct the battery box.

[0034] Schematically, after analyzing the number of battery cells corresponding to at least two system upper limit voltages, taking the at least two numbers of battery cells as the analysis objects, analyze the common factors of the at least two numbers of battery cells. Optionally, for any i-th number of battery cells among the at least two numbers of battery cells, determine the prime factors of the i-th number of battery cells; determine the prime factors corresponding to the at least two numbers of battery cells respectively, and determine the largest common prime factor from the prime factors corresponding to the at least two numbers of battery cells respectively. Among them, a prime factor is a prime number that can divide the i-th number of battery cells, and a prime number is a number greater than 1 and divisible only by 1 and itself, such as 2, 3, 5, 7, etc. For example: the prime factors of the number of battery cells 544 include 2, 2, 2, 2, 17; the prime factors of the number of battery cells 408 include 2, 2, 2, 3, 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, determine the factors of the i-th number of battery cells; determine the factors corresponding to the at least two numbers of battery cells respectively, and determine the largest common factor from the factors corresponding to the at least two numbers of battery cells respectively. Among them, a factor is a number that can divide the i-th number of battery cells, so a factor includes not only prime factors but also other factors other than prime numbers. For example: the prime factors of 12 are 2, 2, 3, but the factors of 18 include not only 2 and 3, but also 1, 4, 6, and 12, which is elaborated here.

[0035] In some embodiments, a battery box is constructed by multiple battery cells. After determining the common factor between at least two numbers of battery cells, based on the common factor, determine the first number of battery cells of the battery cells used to construct the battery box, and the first number of battery cells represents the number of battery cells in the battery box. Optionally, use the common factor as the first number of battery cells of the battery cells used to construct the battery box. Schematically, the common factor is 17. If the common factor is used as the first number of battery cells, it means that a battery box is constructed by 17 battery cells. Optionally, use a preset multiple of the common factor as the first number of battery cells of the battery cells used to construct 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 battery cells, it means that a battery box is constructed by 68 battery cells, etc.

[0036] Step 240, determine the number of battery boxes of the battery box based on the first number of battery cells, and construct an energy storage system according to the number of battery boxes.

[0037] Optionally, after analyzing and determining the first number of battery cells used in constructing a single battery box, based on the fact that at least two system upper limit voltages each correspond to a number of battery cells, it is possible to determine the minimum number value of battery boxes required to construct an energy storage system that supports the system upper limit voltage 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 number of system battery boxes of the battery boxes required to construct an energy storage system that supports the system upper limit voltage, and the number of system battery boxes represents the minimum number value of the battery boxes in the energy storage system that supports the system upper limit voltage. Taking the i-th system upper limit voltage among at least two system upper limit voltages as 2000V as an example, if the i-th number of battery cells corresponding to the i-th system upper limit voltage is obtained as 544, and if the first number of battery cells is determined to be 68 based on the above method, then the quotient of the i-th number of battery cells 544 and the first number of battery cells 64, which is 8, is used as the number of system battery boxes of the battery boxes required to construct an energy storage system that supports the i-th system upper limit voltage, that is, at least 8 battery boxes constructed from 68 battery cells are required to support a 2000V energy storage system, etc.

[0038] Similarly, taking the j-th system upper limit voltage among at least two system upper limit voltages as 1500V as an example, where j is a positive integer and the j-th system upper limit voltage is different from the i-th system upper limit voltage; if the j-th number of battery cells corresponding to the j-th system upper limit voltage is obtained as 408, and if the first number of battery cells is determined to be 68 based on the above method, then the quotient of the j-th number of battery cells 408 and the first number of battery cells 68, which is 6, is used as the number of system battery boxes of the battery boxes required to construct an energy storage system that supports the j-th system upper limit voltage, that is, at least 6 battery boxes constructed from 68 battery cells are required to support a 1500V energy storage system, etc.

[0039] 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 that is compatible with at least two system upper limit voltages is determined by integrating the number of system battery boxes of at least two. Schematically, the least common multiple between 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 that is compatible with at least two system upper limit voltages. For example: the minimum number of battery boxes corresponding to the energy storage system of the i-th system upper limit voltage is 8, and the minimum number of battery boxes corresponding to the energy storage system of 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 construct 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 in the number of battery boxes are connected in different connection methods.

[0040] Schematically, after determining the number of battery boxes to be used when constructing an energy storage system based on the number of first battery cells, an energy storage system is constructed using the battery boxes with the determined number of battery boxes, so that the battery boxes with the determined number of battery boxes in the energy storage system can support at least two system upper limit voltages. For example, if the number of battery boxes is 24, it means that 24 battery boxes are required to construct the energy storage system.

[0041] Optionally, considering that the number of battery cells in each battery box is the same and the cell voltages of each battery cell are default to be the same, the voltage that each battery box can support is the same. Therefore, if it is desired that an energy storage system constructed can support at least two system upper limit voltages, after constructing the energy storage system with the battery boxes of the determined number of battery boxes, the connection method between multiple battery boxes needs to be adjusted so that the energy storage system can flexibly support any one of the at least two selected system upper limit voltages. Schematically, the connection methods between battery boxes generally include series connection method and parallel connection method. Based on the principle that series voltages are added and parallel voltages are equal, if multiple battery boxes adopt the series connection method, the voltages supported by multiple battery boxes are added respectively to determine the voltage jointly supported by multiple battery boxes; if multiple battery boxes adopt the parallel connection method, the voltages supported by multiple battery boxes are the same. In addition, a mixed connection method that combines the series connection method and the parallel connection method can also be selected to connect multiple battery boxes. For example, every 10 battery boxes adopt the series connection method to obtain 3 groups of series-connected battery boxes (each group has 10 series-connected battery boxes). If the voltage of each battery box is 100V, then each group of series-connected battery boxes is 1000V. After that, the 3 groups of series-connected battery boxes are connected in parallel, and the voltage jointly supported by 30 battery boxes is still 1000V, etc.

[0042] In summary, by comprehensively considering at least two system upper limit voltages before constructing the energy storage system, battery boxes with the number of battery boxes that can simultaneously meet at least two system upper limit voltages are obtained, so as to construct an energy storage system that can be applied to at least two system upper limit voltage scenarios with the battery boxes of the number of battery boxes, which strengthens the pertinence 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 constructed energy storage system.

[0043] In an alternative embodiment, based on the number of first battery cells, first determine the number of system battery boxes corresponding to at least two system upper limit voltages respectively, and then comprehensively determine the number of battery boxes when at least two system upper limit voltages in the energy storage system are simultaneously compatible. Schematically, as Figure 3 shown, the above Figure 2 shown embodiment can also be implemented as steps 310 to 350 below; where step 240 can also be implemented as steps 340 to 360 below.

[0044] Step 310, obtain the cell voltage and at least two system upper limit voltages.

[0045] Among them, the at least two system upper limit voltages are at least two voltage upper limits compatible with the preset energy storage system.

[0046] Schematically, the at least two system upper limit voltages include a first system upper limit voltage and a second system upper limit voltage. For example, the first system upper limit voltage is 2000V, and the second system upper limit voltage is 1500V, etc. Among them, 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: It is preset to use lithium iron phosphate batteries ( ) as the battery cells, and its cell voltage is 3.65V, etc.

[0047] Step 320, based on the cell voltage, determine the number of cells corresponding to the at least two system upper limit voltages respectively, and obtain at least two cell numbers.

[0048] Among them, the i-th system upper limit voltage corresponds to the i-th cell number, 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.

[0049] In an optional embodiment, determine the quotient of the at least two system upper limit voltages and the cell voltage respectively, and obtain the number of cells corresponding to the at least two system upper limit voltages respectively. Schematically, use the at least two system upper limit voltages as the dividends respectively, use the cell voltage as the divisor, and calculate the quotient of the at least two system upper limit voltages and the cell voltage respectively; considering that the quotient value may be a decimal, but the number of cells represents the number of battery cells, so the number of cells should be a positive integer. When the quotient value is a positive integer, this quotient value can be used as the number of cells corresponding to this system upper limit voltage. For example: when the system upper limit voltage is 1500V and the cell voltage is 4V, the positive integer quotient value 375 can be used as the number of cells corresponding to the system upper limit voltage of 1500V.

[0050] When the quotient value is a decimal, in order to ensure system safety, a positive integer less than this decimal can be taken as the number of cells corresponding to this system upper limit voltage, so as to restrict the voltage of the energy storage system constructed by the battery cells with the number of cells within the system upper limit voltage range. For example: when the system upper limit voltage is 1500V and the cell voltage is 3.65V, the quotient value is approximately 410.9. Therefore, the quotient value 410.9 cannot be directly used as the number of cells; a positive integer less than the quotient value 410.9 needs to be taken as the number of cells corresponding to the system upper limit voltage of 1500V.

[0051] In some embodiments, when there are decimals in the quotients corresponding to at least two system upper limit voltages respectively, the largest positive even number not greater than the quotient is selected to obtain the first positive even numbers corresponding to the at least two system upper limit voltages respectively. Schematically, if the quotients corresponding to the at least two system upper limit voltages are all decimals, or there is a quotient among the quotients corresponding to the at least two system upper limit voltages that is a decimal, then the largest positive even number not greater than the quotient is selected based on the quotient for analysis. For example: The at least two system upper limit voltages include 2000V and 1500V. Based on the cell voltage of 3.65V, the quotients corresponding to the at least two system upper limit voltages are 547.9 and 410.9 respectively, so both quotients are decimals; the largest positive even numbers not greater than the quotients are 546 and 410, then 546 is taken as the first positive even number corresponding to 2000V, and 410 is taken as the first positive even number corresponding to 1500V.

[0052] In some embodiments, the first positive even numbers corresponding to the at least two system upper limit voltages respectively are used as the number of battery cells corresponding to the at least two system upper limit voltages respectively. Schematically, after determining the first positive even numbers corresponding to the at least two system upper limit voltages respectively, the first positive even numbers corresponding to the at least two system voltages respectively are directly used as the corresponding number of battery cells, so as to construct an energy storage system not greater than the system upper limit voltage using battery cells with the number of battery cells 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, and the corresponding first positive even number is 546, the second system upper limit voltage is 1500V, and 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, and 410 is used as the number of battery cells corresponding to the second system upper limit voltage of 1500V, etc.

[0053] Optionally, when the largest prime factors corresponding to the first positive even numbers corresponding to the at least two system upper limit voltages respectively are the same, the first positive even numbers corresponding to the at least two system upper limit voltages respectively are used as the number of battery cells corresponding to the at least two system upper limit voltages respectively. Schematically, each of the at least two system upper limit voltages corresponds to a first positive even number. The largest prime factors corresponding to the at least two first positive integers are determined. If the largest prime factors are the same, then each of the at least two system upper limit voltages corresponds to a first positive even number, which is used as the number of battery cells corresponding to the at least two system upper limit voltages respectively.

[0054] Optionally, when the largest prime factors corresponding to the first positive even numbers respectively corresponding to at least two system upper limit voltages are different, select the largest positive even number less than the first positive even number as the second positive even number. When the largest prime factors corresponding to the second positive even numbers respectively corresponding to at least two system upper limit voltages are the same, use the second positive even numbers respectively corresponding to at least two system upper limit voltages as the number of battery cells respectively corresponding to at least two system upper limit voltages. Schematically, it is determined that the prime factors of the first positive even number 546 corresponding to 2000V include 2, 3, 7, and 13, and the prime factors of the first positive even number 410 corresponding to 1500V include 2, 5, and 41. Then the largest prime factor of 546 is 13, and the largest prime factor of 410 is 41. The two largest prime factors are different. Therefore, for the first positive even numbers respectively corresponding to at least two system upper limit voltages, select the largest positive even number less than the first positive even number as the second positive even number, and the second positive even numbers respectively corresponding to at least two system upper limit voltages are obtained. For example, the second positive even number corresponding to 2000V is 544, and the second positive even number corresponding to 1500V is 408. Then the prime factors of the second positive even number 544 corresponding to 2000V include 2, 2, 2, 2, 2, and 17, and the prime factors of the second positive even number 408 corresponding to 1500V include 2, 2, 2, 3, and 17. The two largest prime factors are both 17, that is, the same. Therefore, use the second positive even numbers respectively corresponding to at least two system upper limit voltages as the number of battery cells respectively corresponding to at least two system upper limit voltages. Then the number of battery cells for the system upper limit voltage of 2000V is 544, and the number of battery cells for the system upper limit voltage of 1500V is 408.

[0055] 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 battery cell voltage of 3.65, the quotient values corresponding to 2000V are determined to be 547.9, and the quotient values corresponding to 1500V are 410.9; as shown in Table 1 and Table 2, the process of determining the number of battery cells respectively corresponding to the two system upper limit voltages is shown in tabular form.

[0056] Table 1: Determining the number of battery cells corresponding to 2000V

[0057] Table 2: Determining the number of battery cells corresponding to 1500V

[0058] That is: in the integer even numbers less than the quotient value 547.9 and the integer even numbers less than the quotient value 410.9 in descending order, find the common divisors corresponding to the integer even numbers (a factor is also called a divisor, so the common factor can also be called a common divisor), and determine the largest common prime factor from them; as shown in Table 1 and Table 2, compared with the case where the greatest common divisor is 2 in the combination of 546 and 410, the case where the greatest common divisor is 17 in the combination of 544 and 408 is more convenient for subsequently combining battery cells to construct a battery box. Therefore, taking 544 as the number of cells corresponding to 2000V and 408 as the number of cells corresponding to 1500V can be used as a schematic preferred solution. For example: using 544 battery cells with a voltage of 3.65V connected in series to achieve the system upper limit voltage of 2000V can be expressed as 544S (S represents the series in Series Connection); similarly, using 408 battery cells with a voltage of 3.65V connected in series to achieve the system upper limit voltage of 1500V can be expressed as 408S, etc., which is not limited here.

[0059] Step 330, determine the common divisors of at least two numbers of cells, and based on the common divisors, determine the first number of cells of the battery cells used to construct the battery box. Optionally, the at least two numbers of cells may be information directly determined based on the quotient values of at least two system upper limit voltages divided by the cell voltage respectively. For example, taking the quotient values corresponding to at least two system upper limit voltages as the numbers of cells respectively to obtain at least two numbers of cells; then determine the factors (such as prime factors) corresponding to at least two numbers of cells respectively, so as to determine the common factors (such as the common prime factors) shared by at least two numbers of cells as the common divisors. Optionally, the at least two numbers of cells may also be information jointly determined by comprehensively considering the quotient values and prime factors corresponding to two system upper limit voltages respectively (as shown in Table 1 to Table 2 above), so the common divisor information determined when determining at least two numbers of cells can be used.

[0060] In an optional embodiment, take the greatest common divisor of at least two numbers of cells as the first number of cells of the battery cells used to construct the battery box.

[0061] Schematically, after determining the number of at least two battery cells, the common factors among the factors corresponding to the number of at least two battery cells are determined as the common factors, and the greatest common factor among them is determined. For example, as shown in Table 1 and Table 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 number of the first battery cells, and thus a battery box is constructed with the battery cells of the number of the first battery cells. For example, the greatest common factor is 17, and 17 is used as the number of the first battery cells, and thus a battery box is constructed with 17 battery cells.

[0062] In an alternative embodiment, a preset multiple of the greatest common factor of the number of at least two battery cells is used as the number of the first battery cells of the battery cells for constructing the battery box.

[0063] Optionally, the preset multiple is a preset integer multiple value. Schematically, considering that the battery will expand and contract repeatedly during charging and discharging, and the degree of expansion is greater and the expansion force generated is greater at the end of its life; therefore, when determining the number of the first battery cells of the battery cells of the battery box based on the number of at least two battery cells, a preset multiple is preset to cope with the expansion change. After determining the greatest common factor, the product of the greatest common factor and the preset multiple is used as the number of the first battery cells, and thus a battery box is constructed with the battery cells of the number of the first battery cells. For example, the greatest common factor is 17, the preset multiple is 4, and the product value 68 of 17 and 4 is used as the number of the first battery cells, and thus a battery box is constructed with 68 battery cells. The number of the first battery cells is a compatible number jointly determined based on the number of battery cells corresponding to at least two system upper limit voltages. Therefore, constructing a battery box with the battery cells of the number of the first battery cells helps to make the integer multiple relationship between the energy storage system and the battery box, and is convenient for constructing an energy storage system compatible with at least two system upper limit voltages based on the battery box.

[0064] Step 340, determine the battery box voltage of a single battery box composed of the number of the first battery cells.

[0065] Schematically, the number of the first battery cells is the number of battery cells in a single battery box. Therefore, based on the number of the first battery cells and the cell voltage corresponding to the battery cells, the battery box voltage corresponding to a single battery box can be obtained. For example, the number of the first battery cells is 68, and the cell voltage corresponding to the battery cells is 3.65V, then the battery box voltage of a single battery box is 248.2V. The battery box voltage is used to represent the value of the voltage supported by a single battery box.

[0066] Step 350, determine the quotient of at least two system upper limit voltages and the battery box voltage respectively, and obtain the system battery box numbers corresponding to at least two system upper limit voltages respectively.

[0067] Schematically, at least two system upper limit voltages represent the upper limit voltages that a preset energy storage system needs to support. The first cell quantity is a compatible quantity jointly determined based on the cell quantities respectively corresponding to the at least two system upper limit voltages. Therefore, the battery box constructed with battery cells based on the first cell quantity helps to construct an energy storage system compatible with at least two system upper limit voltages. Taking the at least two system upper limit voltages as the dividends and the battery box voltage as the divisor can effectively determine the system battery box quantities respectively corresponding to the at least two system upper limit voltages. Among them, the system battery box quantity represents the minimum quantity value of the battery boxes in the energy storage system that supports the system upper limit voltage, and the kth system battery box quantity is used to characterize the minimum quantity of the battery boxes in the energy storage system that supports the kth system upper limit voltage, where k is a positive integer. For example: if a system upper limit voltage is 2000V and the battery box voltage is 248.2V, then the quotient of the two is approximately 8; if another system upper limit voltage is 1500V and the battery box voltage is 248.2V, then the quotient of the two is approximately 6. That is: at least 8 battery boxes are required to construct an energy storage system to support the system upper limit voltage of 2000V. Similarly, at least 6 battery boxes are required to construct an energy storage system to support the system upper limit voltage of 1500V.

[0068] In an alternative embodiment, the at least two system upper limit voltages include a first system upper limit voltage and a second system upper limit voltage.

[0069] Optionally, taking the quotient of the first system upper limit voltage and the battery box voltage as the first system battery box quantity that supports the first system upper limit voltage, and the first system battery box quantity is used to characterize the minimum quantity of the battery boxes deployed in the energy storage system when supporting the first system upper limit voltage. Optionally, taking the quotient of the second system upper limit voltage and the battery box voltage as the second system battery box quantity that supports the second system upper limit voltage, and the second system battery box quantity is used to characterize the minimum quantity of the battery boxes deployed in the energy storage system when supporting the second system upper limit voltage.

[0070] Step 360, based on the system battery box quantities respectively corresponding to the at least two system upper limit voltages, obtain the battery box quantity of the battery boxes in the energy storage system when being compatible with the at least two system upper limit voltages.

[0071] Schematically, after obtaining the at least two system battery box quantities, in order to make the constructed energy storage system compatible with the at least two system upper limit voltages, it is necessary to analyze the commonalities of the at least two system battery box quantities to obtain the battery box quantity of the battery boxes included in the energy storage system when being compatible with the at least two system upper limit voltages, and the battery box quantity is used to characterize the quantity of the battery boxes used when constructing the energy storage system.

[0072] In an alternative embodiment, obtain the least common multiple of the number of system battery boxes corresponding to at least two system upper limit voltages as the number of battery boxes for constructing an energy storage system. Schematically, the least common multiple represents the common multiple of at least two integers. In other words, the least common multiple is a number that can be evenly divided by the at least two integers.

[0073] In some embodiments, obtain the least common multiple between the number of first system battery boxes and the number of second system battery boxes as the number of battery boxes for constructing an energy storage system. Schematically, the number of first system battery boxes is 8, and the number of second system battery boxes is 6. The least common multiple between the number of first system battery boxes and the number of second system battery boxes is a value such as 24, 48, 72, etc.

[0074] In an alternative embodiment, obtain the least common multiple of the number of system battery boxes corresponding to at least two system upper limit voltages as the number of battery boxes for constructing an energy storage system. Schematically, the least common multiple is the least common multiple among the 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, it means constructing an energy storage system with fewer battery boxes, which helps to avoid the problem of the over-large construction size of the energy storage system and make full use of the energy storage resources of the battery boxes.

[0075] In some embodiments, obtain the least common multiple between the number of first system battery boxes and the number of second system battery boxes as the number of battery boxes for constructing an energy storage system. Schematically, the number of first system battery boxes is 8, and the number of second system battery boxes is 6. The common multiples between the number of first system battery boxes and the number of second system battery boxes are values such as 24, 48, 72, etc.; among them, the least common multiple is 24, which means that the number of battery boxes for constructing an energy storage system can be selected as 24.

[0076] In the embodiments of the present application, a process of determining the number of system battery boxes corresponding to at least two system upper limit voltages based on the battery box voltage is introduced, so as to obtain 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 number of system battery boxes, it is possible to more specifically analyze the minimum number of battery boxes required to support different system upper limit voltages, and thus obtain the battery boxes that help to adapt to at least two system upper limit voltages by integrating the least common multiple (such as the least common multiple) of the number of at least two system battery boxes, so that an energy storage system compatible with at least two system upper limit voltages can be constructed based on the number of battery boxes, improving the adaptability of the energy storage system and facilitating the adaptation of the already constructed energy storage system to the system upper limit voltages considered during other constructions, thereby enhancing the system usage efficiency.

[0077] In an alternative embodiment, at least two system upper limit voltages include a first system upper limit voltage and a second system upper limit voltage. Schematically, as Figure 4 shown, the process of constructing an energy storage system according to the number of battery boxes in step 240 shown above can also be implemented as steps 410 to 440 below. Figure 2 shown, the process of constructing an energy storage system according to the number of battery boxes in step 240 shown above can also be implemented as steps 410 to 440 below.

[0078] Step 410, connect a first number of battery cells in series to obtain a single battery box, and obtain a number of battery boxes equal to the number of battery boxes.

[0079] Schematically, the first number of battery cells is used to describe the number of battery cells that make up a single battery box. For example, if the first number of battery cells is 68, it means that a single battery box is constructed from 68 battery cells. Optionally, based on the principle that series voltages add up and parallel voltages are equal, in order to enable the battery box constructed from battery cells to reach the maximum voltage, the first number of battery cells in the battery box are connected in series to obtain a battery box constructed from the first number of battery cells.

[0080] Step 420, determine the battery box voltage of a single battery box composed of the first number of battery cells.

[0081] Schematically, the first number of battery cells is the number of battery cells in a single battery box. Therefore, based on the first number of battery cells and the cell voltage corresponding to the battery cells, the battery box voltage corresponding to a single battery box can be obtained. The battery box voltage corresponding to the battery box is the product of the first number of battery cells and the cell voltage. For example: if the first number of battery cells is 68 and the cell voltage corresponding to the battery cells is 3.65V, then the battery box voltage of a single battery box is 248.2V. The battery box voltage is used to represent the value of the voltage supported by a single battery box.

[0082] In an alternative embodiment, considering that different numbers of battery cells correspond to different system upper limit voltages, if it is desired to use a fixed number of battery boxes to support different system upper limit voltages, then based on the analysis of series voltage addition and parallel voltage equality for the battery box connection method, by adjusting the series and parallel connection of the battery boxes, it is possible to achieve the purpose of supporting different system upper limit voltages in different connection methods while keeping the number of battery boxes unchanged.

[0083] In some embodiments, after determining the number of battery boxes required to construct an energy storage system based on the number of first battery cells, the energy storage system can be constructed using the determined number of battery boxes; when it is desired that the energy storage system supports a first system upper limit voltage, the battery boxes are connected in the connection manner of step 430 below; when it is desired that the energy storage system supports a second system upper limit voltage, the battery boxes are connected in the connection manner of step 440 below, so that the battery boxes can be connected in different connection manners with the same number of battery boxes to support different system upper limit voltages.

[0084] 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 with the determined number of battery boxes in a first connection manner to obtain an energy storage system that supports the first system upper limit voltage.

[0085] Illustratively, based on the quotient of the first system upper limit voltage and the battery box voltage, obtain the minimum number of battery boxes in the energy storage system when supporting the first system upper limit voltage, that is, determine the number of first system battery boxes; describe the number of battery boxes based on the number of first system battery boxes, so the number of first system battery boxes is a positive integer. For example: 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 approximately 8.05, and since the number of first system battery boxes is a positive integer, the number of first system battery boxes is taken as 8.

[0086] In an alternative embodiment, obtain the quotient of the number of battery boxes and the number of first system battery boxes to get the first parallel connection number. Illustratively, the number of battery boxes is the number of battery boxes required to construct an energy storage system determined based on the number of first battery cells, and the energy storage system with the determined 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 first system battery boxes is the minimum number of battery boxes in the energy storage system when supporting the first system upper limit voltage, so the battery boxes with the number of first system battery boxes can support the first system upper limit voltage. Optionally, since the number of battery boxes is greater than the number of first system battery boxes, the extra battery boxes beyond the number of first system battery boxes should be considered to be connected in a parallel connection manner to obtain the energy storage system, to avoid the voltage obtained by directly connecting the battery boxes with the determined number of battery boxes in series being greater than the first system upper limit voltage, which may affect the safety of the energy storage system. Illustratively, both the number of battery boxes and the number of first system battery boxes are used to describe the number of battery boxes, so both are positive integers; calculate the quotient of the number of battery boxes and the number of first system battery boxes to divide the situations of the battery boxes that need to be connected in parallel connection and series connection respectively. For example: the number of battery boxes is 24, and the number of first system battery boxes for supporting the first system upper limit voltage is 8, then the quotient of the number of battery boxes and the number of first system battery boxes gives the first parallel connection number as 3.

[0087] In an optional embodiment, battery boxes with the number of the first system battery boxes are connected in series to obtain the first battery clusters with the first parallel number. Wherein, the number of battery boxes is the product of the first parallel number and the number of the first system battery boxes; the number of the first system battery boxes is the number of battery boxes connected in series, and a single first battery cluster is obtained by connecting the number of the first system battery boxes in series. After connecting the number of the first system battery boxes in series, the first battery clusters with the first parallel number will be obtained based on the number of battery boxes. Schematically, considering that the number of battery boxes of the first system can support the upper limit voltage of the first system, the number of the first system battery boxes is preferably connected in series. For example: the number of battery boxes is 24, and the number of the 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, and each first battery cluster is obtained by connecting 8 battery boxes in series; 3 first battery clusters are obtained based on 24 battery boxes.

[0088] In an optional embodiment, the first battery clusters with the first parallel number are connected in parallel to obtain an energy storage system that supports the upper limit voltage of the first system. Schematically, since each first battery cluster is constructed by the number of the first system battery boxes, and the number of the first system battery boxes is the minimum number of battery boxes that can support the upper limit voltage of the first system, the battery cluster voltage of each first battery cluster is the upper limit voltage of the first system; in order to prevent the energy storage system that hopes to be compatible with at least two system upper limit voltages from exceeding the upper limit voltage of the first system, after obtaining the first battery clusters with the first parallel number, the first battery clusters with the first parallel number are connected in parallel, so that the energy storage system constructed by the number of battery boxes can support the upper limit voltage of the first system. Therefore, the first parallel number is used to represent the number of battery clusters connected in parallel.

[0089] Schematically, as Figure 5 shown, if the number of battery boxes is 24, an energy storage system is constructed by 24 battery boxes 510 ( Figure 5 the small rectangles shown in); if the number of the first system battery boxes is determined to be 8 when the energy storage system supports the upper limit voltage of the first system, 8 battery boxes are connected in series to obtain 3 first battery clusters, as Figure 5 shown in 3 columns of battery clusters, namely the first battery cluster 1, the first battery cluster 2, and the first battery cluster 3; 3 first battery clusters are connected in parallel, so that the energy storage system constructed by 24 battery boxes can support the upper limit voltage of the first system of 2000V; the first battery cluster constructed by 8 series-connected battery boxes can support 2000V alone, and the parallel voltages of the 3 battery clusters connected in parallel are the same. Therefore, the energy storage system constructed by 24 battery boxes together supports the upper limit voltage of the first system.

[0090] In addition, if the energy storage system is a container with dimensions of 3300 mm × 2438 mm × 2896 mm, Figure 5 is the front view of the energy storage system; in addition, other components such as the electrical compartment 520 may also be deployed in the energy storage system; in addition, the energy storage system supporting the upper limit voltage of the first system can also be expressed as 1P68S×8×3, where 1P68S represents the configuration of the battery box, that is, 1 parallel and 68 series; 8 is the number of battery boxes that make up a single battery cluster, and 3 is the number of battery clusters that make up the energy storage system, which is not limited here.

[0091] Step 440: Determine the quotient of the upper limit voltage of the second system and the voltage of the battery box to obtain the number of battery boxes of the second system corresponding to the upper limit voltage of the second system; based on the number of battery boxes of the second system and the number of battery boxes, connect the battery boxes with the number of battery boxes in the second connection method to obtain an energy storage system that supports the upper limit voltage of the second system.

[0092] Schematically, based on the quotient of the upper limit voltage of the second system and the voltage of the battery box, obtain the minimum number of battery boxes in the energy storage system when supporting the upper limit voltage of the second system, that is, determine the number of battery boxes of the second system; describe the number of battery boxes based on the number of battery boxes of the second system, so the number of battery boxes of the second system is a positive integer. For example: the upper limit voltage of the second system is 1500V, and the voltage of the battery box is 248.2V; then it is determined that the quotient of the upper limit voltage of the second system and the voltage of the battery box is approximately 6.04, and based on the fact that the number of battery boxes of the second system is a positive integer, the number of battery boxes of the second system is taken as 6.

[0093] In an alternative embodiment, obtain the quotient of the number of battery boxes and the number of battery boxes of the second system to obtain the second parallel number. Schematically, the number of battery boxes of the energy storage system 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 second system is used as the minimum number of battery boxes in the energy storage system when supporting the upper limit voltage of the second system, so the battery boxes with the number of battery boxes of the second system can support the upper limit voltage of the second system. Optionally, since the number of battery boxes is greater than the number of battery boxes of the second system, the extra battery boxes with the number of battery boxes of the second system should be considered to be connected in a parallel connection method to obtain the energy storage system, so as to avoid the voltage obtained by directly connecting the battery boxes with the number of battery boxes in series being greater than the upper limit voltage of the second system, which affects the safety of the energy storage system. Schematically, both the number of battery boxes and the number of battery boxes of the second system are used to describe the number of battery boxes, so both are positive integers; calculate the quotient of the number of battery boxes and the number of battery boxes of the second system to divide the cases of the battery boxes that need to be connected in parallel connection and series connection respectively. For example: the number of battery boxes is 24, and the number of battery boxes of the second system used to support the upper limit voltage of the second system is 6, then the quotient of the number of battery boxes and the number of battery boxes of the second system is obtained, and the second parallel number is 4.

[0094] In an alternative embodiment, a second number of battery boxes are connected in series to obtain a second number of second battery clusters in parallel.

[0095] Wherein, the number of battery boxes is the product of the second number in parallel and the number of second system battery boxes; the number of second system battery boxes is the number of battery boxes connected in series, and a single second battery cluster is obtained by connecting the battery boxes in the number of second system battery boxes in series. Then, after connecting the battery boxes in the number of second system battery boxes in series, a second number of second battery clusters in parallel are obtained based on the battery boxes in the number of battery boxes.

[0096] Illustratively, considering that the battery boxes in the number of second system battery boxes can support the upper limit voltage of the second system, it is therefore preferred to connect the battery boxes in the number of second system battery boxes in a series connection manner. For example: the number of battery boxes is 24, and the number of second system battery boxes corresponding to the upper limit voltage of the second system is 6. Then, 6 battery boxes are connected in series to obtain 4 second battery clusters, and each second battery cluster is obtained by connecting 4 battery boxes in series; 4 second battery clusters are obtained based on 24 battery boxes.

[0097] In an alternative embodiment, a second number of second battery clusters in parallel are connected in parallel to obtain an energy storage system that supports the upper limit voltage of the second system.

[0098] Illustratively, since each second battery cluster is constructed by the battery boxes in the number of second system battery boxes, and the number of second system battery boxes is the minimum number of battery boxes that can support the upper limit voltage of the second system, the battery cluster voltage of each second battery cluster is the upper limit voltage of the second system; in order to prevent the energy storage system that is desired to be compatible with at least two system upper limit voltages from exceeding the upper limit voltage of the second system, after obtaining the second number of second battery clusters in parallel, the second number of second battery clusters in parallel are connected in parallel, so that the energy storage system constructed by the battery boxes in the number of battery boxes can support the upper limit voltage of the second system.

[0099] Therefore, the second number in parallel is used to represent the number of battery clusters connected in parallel.

[0100] Illustratively, as Figure 6 shown, if the number of battery boxes is 24, then an energy storage system is constructed by 24 battery boxes 610 ( Figure 6 the small rectangles shown in Figure 6The shown 4-row battery cluster includes the second battery cluster 1, the second battery cluster 2, the second battery cluster 3, and the second battery cluster 4 respectively. The 4 second battery clusters are connected in parallel, so that the energy storage system composed of 24 battery boxes can support the upper limit voltage of the second system, which is 1500V. Among them, the second battery cluster composed of 8 series-connected battery boxes can support 1500V alone, and the parallel voltages of the 4 battery clusters connected in parallel are the same. Therefore, the 24 battery boxes together construct an energy storage system that supports the upper limit voltage of the second system.

[0101] In addition, if the energy storage system is a container with the same length, width, and height of 3300mm×2438mm×2896mm as Figure 5 the one shown, Figure 6 it is the front view of the energy storage system. In addition, other components such as the electrical compartment 620 may also be deployed in the energy storage system. In addition, the energy storage system that supports the upper limit voltage of the second system can also be expressed as 1P68S×6×4, where 1P68S represents the configuration of the battery boxes, that is, 1 parallel and 68 series; 6 is the number of battery boxes that make up a single battery cluster, and 4 is the number of battery clusters that make up the energy storage system, which is not limited here.

[0102] Taking Figure 5 and Figure 6 as a comparison, the energy storage system is constructed based on the analysis of the upper limit voltages of two systems, 2000V and 1500V. The same number of battery boxes (both 24 battery boxes) are deployed in the energy storage system. When supporting different upper limit voltages of the system, while keeping the number of battery boxes unchanged, the purpose of flexible voltage support of the energy storage system can be achieved by flexibly adjusting the connection method between the battery boxes.

[0103] In the embodiments of the present application, a method of connecting battery boxes in different connection methods when supporting different upper limit voltages of the system while keeping the number of battery boxes unchanged is introduced. After constructing an energy storage system with a certain number of battery boxes, according to the upper limit voltage of the system that the energy storage system needs to support, flexibly analyze the situation of the battery boxes forming battery clusters, connect the battery boxes in the battery cluster in series, and connect multiple battery clusters in parallel. This can not only flexibly change the voltage support situation while ensuring the number of battery boxes remains unchanged, but also help maintain the currently selected upper limit voltage of the system in the case of some battery boxes being damaged, ensuring the system operation stability of the energy storage system and improving the system utilization rate of the energy storage system.

[0104] In an alternative embodiment, a battery module is constructed according to at least one battery cell, at least one battery module constructs a battery box, at least one battery box constructs a battery cluster, and at least one battery cluster constructs a hierarchical architecture of an energy storage system. The second number of battery cells forming the battery module is determined based on the greatest common divisor of at least two numbers of battery cells, and then the battery box is constructed based on the battery module. Schematically, as Figure 7 shown, the above Figure 2 step 230 shown can also be implemented as steps 710 to 720 below.

[0105] Step 710: Determine the greatest common divisor of at least two numbers of battery cells, and use the greatest common divisor of at least two numbers of battery cells as the second number of battery cells for constructing a single battery module.

[0106] Optionally, for any i-th number of battery cells among at least two numbers of battery cells, determine the prime factors of the i-th number of battery cells; determine the prime factors corresponding to at least two numbers of battery cells respectively, and determine the largest common prime factor among the prime factors corresponding to at least two numbers of battery cells as the greatest common divisor. For example: The prime factors of the number of battery cells 544 include 2, 2, 2, 2, 17; the prime factors of the number of battery cells 408 include 2, 2, 2, 3, 17, then the common prime factors include 2 and 17, and the largest common prime factor is 17. Then, it is determined that the second number of battery cells for constructing a single battery module is 17, that is, a single battery module is constructed by using 17 battery cells. Schematically, in order to utilize the voltage accumulation ability of the battery cells, the battery cells with the second number are connected in series to obtain a single battery module. For example: 17 battery cells are connected in series to obtain a single battery module, and a single battery module can be represented as 17S.

[0107] Step 720: Obtain the number of modules of the battery modules for constructing a single battery box based on the second number of battery cells.

[0108] Since a single battery box is constructed from at least one battery module, therefore, in the case of determining the first number of battery cells and the second number of battery cells, the number of modules of the battery modules for constructing a single battery box can be obtained. Optionally, the quotient of the first number of battery cells and the second number of battery cells is used as the number of modules of the battery modules for constructing a single battery box, where the first number of battery cells is the product of the second number of battery cells and the number of modules. Schematically, taking the second number of battery cells as 17 and the first number of battery cells as 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, then the number of modules of the battery modules for constructing a single battery box is 4, that is, it represents that 4 battery modules construct a battery box.

[0109] In an optional embodiment, after constructing a battery box based on battery modules and then constructing an energy storage system with the same number of battery boxes as the number of battery boxes, according to the difference in the upper limit voltage supported by the energy storage system, flexibly determine the number of battery boxes within a battery cluster when constructing battery clusters from the battery boxes, that is, flexibly divide the battery clusters in the energy storage system.

[0110] Optionally, determine the quotient of the first system upper limit voltage and the battery box voltage to obtain the first system battery box number corresponding to the first system upper limit voltage; obtain the quotient of the number of battery boxes and the first system battery box number to obtain the first parallel number, and the number of battery boxes is the product of the first parallel number and the first system battery box number; connect the battery boxes with the number of the first system battery boxes in series to obtain the first battery clusters with the first parallel number; connect the first battery clusters with the first parallel number in parallel to obtain an energy storage system supporting the first system upper limit voltage. Schematically, 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, so as to flexibly determine the battery cluster division of the energy storage system under the condition of supporting the first system upper limit voltage.

[0111] Optionally, determine the quotient of the second system upper limit voltage and the battery box voltage to obtain the second system battery box number corresponding to the second system upper limit voltage; obtain the quotient of the number of battery boxes and the second system battery box number to obtain the second parallel number; connect the battery boxes with the number of the second system battery boxes in series to obtain the second battery clusters with the second parallel number; connect the second battery clusters with the second parallel number in parallel to obtain an energy storage system supporting the second system upper limit voltage. Schematically, 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, so as to flexibly determine the battery cluster division of the energy storage system under the condition of supporting the second system upper limit voltage.

[0112] In summary, by comprehensively considering at least two system upper limit voltages before constructing the energy storage system, obtaining battery boxes with the number of battery boxes that can simultaneously meet at least two system upper limit voltages strengthens the pertinence 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 constructed energy storage system.

[0113] In an optional embodiment, before constructing the energy storage system, first determine the size constraint data of the energy storage system, and then comprehensively analyze the size constraint data and the number of battery boxes determined based on the above energy storage system construction method through a size generation model, so as to construct the energy storage system with the number of battery boxes. Schematically, as Figure 8As shown, the step of constructing the energy storage system according to the number of battery boxes in step 240 above can also be implemented as steps 810 to 840 below.

[0114] Step 810, obtain the dimension constraint data of the energy storage system.

[0115] Among them, the dimension constraint data is used to constrain the array arrangement of at least one component in the energy storage system from the dimension dimension. Optionally, the component is part of the energy storage system, and the component includes at least one of battery cells, battery modules, battery boxes, and battery clusters. Schematically, the dimension dimension is the analysis situation of the component from the perspective of the component size; in the design of the energy storage system, it is necessary to preset the dimension constraint data in advance to constrain the dimension situation during the construction of the energy storage system. Optionally, the dimension constraint data is preset data for the overall dimension of the energy storage system, such as the dimension constraint data is the standard dimension of 20 feet, 10 feet, etc.; or, the dimension constraint data is a set non-standard dimension, etc.

[0116] Step 820, analyze the dimension constraint data and the number of battery boxes through the dimension generation model to obtain the battery box dimension data of a single battery box in the energy storage system.

[0117] Among them, the dimension generation model is a trained mathematical model. Optionally, the dimension generation model is a trained mathematical model, and the dimension generation model is composed of multiple mathematical function formulas. The multiple mathematical function formulas correspond to at least one function type, and the function type includes at least one of linear functions, non-linear functions (such as exponential functions, logarithmic functions, power functions, etc.), polynomial functions, and piecewise functions. Among them, the dimension generation model learns the correlation relationship between the dimension constraint data and the dimension data of at least one component during the training process. Optionally, the component dimension data of at least one component learned by the dimension generation model during the training process is usually implemented as the component dimension data corresponding to multiple components respectively. That is: the dimension generation model learns the correlation relationship between the dimension constraint data and the dimension data of multiple components during the training process. When predicting the component dimension data through the dimension generation model, the at least one component analyzed is the at least one component learned during the training process.

[0118] In some embodiments, in addition to the size constraint data affecting the construction process of the energy storage system, there are also size influence parameters affecting the construction process of the energy storage system. The size influence parameters are parameters that affect the spatial layout of the energy storage system. The size influence parameters are usually pre-set parameter types. For example, the size influence parameters include at least one of multiple parameters such as the number of components, the spacing between components, and the component arrangement method (head-to-tail arrangement or side-by-side arrangement). Schematically, the size influence parameters include the number of components, such as the number of battery boxes, the number of battery cells, the number of modules, etc. Optionally, the size generation model learns the association relationship between the size constraint data, the size data of at least one component, and the number of at least one component during the training process; analyze the size constraint data and the number of battery boxes through the size generation model to analyze the battery box size data of a single battery box in the energy storage system under the constraint of the size constraint data when there are battery boxes with the number of battery boxes.

[0119] Schematically, the battery box size data is the size of a single battery box in the energy storage system. For example: The size constraint data is the system size data of the energy storage system. After obtaining the size generation model, when it is less than the system size data, use the previously calculated number of battery boxes as the analysis parameter of the size generation model to obtain the battery box size data of a single battery box in the energy storage system, so as to reverse-infer the battery box size data from the system-battery box size inference order, etc.

[0120] Step 830, analyze the battery box size data and the number of first battery cells through the size generation model to obtain the cell size data of a single battery cell in the energy storage system.

[0121] Schematically, after analyzing the battery box size data, based on the previously calculated number of first battery cells used to construct a single battery box, analyze the size of a single battery cell in the battery box to obtain the cell size data. That is: The cell size data is used to describe the size of the battery cell.

[0122] Optionally, when the battery box is constructed by battery modules and the battery modules are constructed by battery cells, determine the number of modules in a single battery box; based on the battery box size data and the number of modules, obtain the module size data of a single battery module in the battery box. Schematically, under the constraint of the battery box size data, analyze the module size data of a single battery module when constructing the battery box based on the number of modules in a single battery box. The module size data is the size situation of a single battery module. Optionally, based on the number of modules in the battery box, determine the second number of cells in a single battery module. 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, obtain the cell size data of a single battery cell in the energy storage system. Schematically, under the constraint of the module size data, analyze the cell size data of a single battery cell when constructing the battery module based on the number of cells in a single battery module. The cell size data is the size situation of a single battery cell. That is: in the way of sequentially deriving the sizes of the energy storage system, battery box, battery module, and battery cell, obtain the cell size data of a single battery cell in the energy storage system; in addition, when the energy storage system consists of multiple battery clusters and a single battery cluster consists of multiple battery boxes, etc., it is also possible to obtain the cell size data of a single battery cell in the energy storage system in the way of sequentially deriving the sizes of the energy storage system, battery cluster, battery box, battery module, and battery cell, etc.

[0123] Step 840, construct an energy storage system using the first battery box with the number of battery boxes under the constraints of the cell size data and the battery box size data.

[0124] Schematically, the cell size data is the size of the battery cell, and the battery box size data is the size of the battery box. Considering the constraints of the size data of multiple components, the first battery box with the number of battery boxes can be used to construct the energy storage system more specifically. Optionally, when obtaining the cell size data, module size data, battery box size data, and battery cluster size data, it is also possible to construct the energy storage system using the first battery box with the number of battery boxes considering the constraints of the cell size data, module size data, battery box size data, and battery cluster size data, etc., which is not limited here.

[0125] As Figure 9 shown, the front view of constructing an energy storage system using the first battery box with the number of battery boxes under the constraint of the size data is presented. The energy storage system is a container with a length, width, and height of 3300mm × 2438mm × 2896mm. If there is an electrical compartment 910 deployed in it (such as taking the size influence parameters as an example to constrain the size analysis process during the size generation model analyzing the size), it also includes 24 battery boxes 920, and the 24 battery boxes 920 are distributed in a three-column and eight-row pattern. For example, the height of the battery box 920 is 272mm. As Figure 10 shown, forFigure 9 A top view of a first battery box construction energy storage system that uses the number of battery boxes under the constraint of dimensional data. The energy storage system is a container with dimensions of 3300 mm × 2438 mm × 2896 mm. For example, it includes 3 battery clusters 1010 (each battery cluster has a length of 776 mm, a height of 2230 mm, and a width not shown). Each battery cluster 1010 includes 8 battery boxes (refer to the battery box 920 in Figure 9 ), and each battery box is constructed from 68 battery cells. As Figure 10 shown, every 17 battery cells are used to construct a battery module, and every 4 battery modules are used to construct a battery box. As Figure 11 shown, it is a schematic diagram of the arrangement method from battery cells to an energy storage system (Cell To System, CTL). Among them, multiple battery cells are used to construct a battery module, multiple battery modules are used to construct a battery box 1110, and multiple battery boxes are used to construct an energy storage system 1120. Other components such as an electrical compartment can also be pre-configured in the energy storage system, which is not limited here.

[0126] In an alternative embodiment, the construction method of the energy storage system is described as follows.

[0127] Considering that currently, large-scale new energy electrochemical energy storage systems on the market are still mainly 1500V (system upper limit voltage) energy storage systems. The DC side voltage of the energy storage system is upgraded from 1000V to 1500V because the voltage of the solar photovoltaic system is upgraded from 1000V to 1500V, and the former needs to match the latter; currently, 2000V solar photovoltaic systems have emerged, but there is no mature supporting design for the supporting 2000V high-voltage energy storage system. However, 2000V energy storage systems will become more and more popular in the foreseeable future with the optimization and upgrading of various supporting components and equipment and the maturity of the supporting standard system; in addition, currently, the mass of the large-capacity energy storage systems designed and manufactured based on 20-foot standard high-cube containers is as high as more than 40 tons or even close to 50 tons, making it difficult or even impossible to use the overall transportation method (integrate all or most of the main components and equipment of the container energy storage system before leaving the factory) to transport from the manufacturer to the project site, especially for overseas projects involving sea transportation and destination transportation. There are too many limiting factors, which virtually increase the uncontrollable risks during the transportation of dangerous goods and the logistics cost is relatively high.

[0128] 1. Taking the upper limit voltage of the first system as 2000V and the upper limit voltage of the second system as 1500V as an example, according to the upper limit voltage of the system and considering compatibility with 1500V and 2000V systems, the grouping method of the energy storage system is derived as follows. (1) For lithium iron phosphate single cells, the upper limit voltage is taken as 3.65V. 2000 / 3.65 ≈ 547.9, and 1500 / 3.65 ≈ 410.9. (2) In the integers and even numbers less than 547.9 and less than 410.9 in descending order, the common divisors are found, as shown in Table 1 and Table 2 above. From the above reasoning data, the optimal solution is: for 2000V, 544S cells are connected in series, and for 1500V, 408S cells are connected in series; (here S means series connection). (3) Therefore, 17S is the smallest indivisible unit, 34S contains 2 such smallest units, 68S contains 4 such smallest units, and 136S contains 8 such smallest units [the latter three can also be grouped in the way of Cell to Pack (CTP), that is, the battery box can be directly constructed from the battery cells without the process of constructing the battery module from the battery cells first and then constructing the battery box from the battery module]; relatively speaking, 68S has greater practicality (17S × 4, 2 rows and 2 columns, as shown in Figure 10 ; or 2 34S grouped according to CTP); (4) Therefore, 544S = 68S × 8, and 408S = 68S × 6; that is, the 2000V voltage can be obtained by connecting 8 1P68S battery boxes in series, and the 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. Considering factors such as the overall product shape and size, the layout design is carried out based on a 10-foot container: the 2000V system is configured as 1P68S × 8 × 3, and the 1500V system is configured as 1P68S × 6 × 4, both composed of 24 1P68S battery boxes [Note: 1P68S refers to the configuration of the battery box (battery pack), indicating 1 parallel and 68 series; the middle number represents the number of the aforementioned battery modules included in a single battery cluster; the last number represents the number of battery clusters in the energy storage system].

[0129] 2. According to the above configuration, the construction of the energy storage system is derived using the parameterized energy storage system integrated control method (i.e., the system-level to cell-level size reasoning logic of the energy storage system); thus, the layout design of the energy storage system and further detailed design are carried out.

[0130] In the above process, the design is based on a 10-foot container, with the overall size and weight controllable (usually not exceeding 25 tons). There are no restricted factors such as over-limit, overweight, and dangerous goods transportation, which is conducive to overall transportation and flexible installation and deployment at the project site. In addition, the high-voltage boxes of the battery clusters are centrally placed in the electrical cabin, improving the space and size utilization rate in the height direction. The height h of the supporting battery cells including the pole columns and the height H of the container satisfy the relationship: 0.09 ≥ h / H ≥ 0.07. Additionally, since lithium-ion batteries expand and contract repeatedly during charging and discharging, and the degree of expansion is greater and the expansion force generated is greater at the end of the life cycle, the expansion force factor in the design process of this traditional bundled module can be considered (reserving space for shock absorption and insulation). The thickness d of the supporting battery cells and the width W of the container satisfy the relationship: 0.03 ≥ d / W ≥ 0.02.

[0131] In addition, by changing the connection method between battery modules, compatibility with multiple system upper limit voltage levels such as 1500V and 2000V is achieved. Therefore, there are a large number of common materials in the energy storage systems constructed under multiple voltage limitations, 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 customized and configured for upgrade based on customer needs.

[0132] In addition, different from most mainstream large-capacity energy storage systems designed based on standard 20-foot containers, the above process can be designed based on standard 10-foot containers, which is very convenient for in-plant transfer before leaving the factory and hoisting at the project site, and does not require super-large lifting equipment. Its product external dimensions include but are not limited to the following ranges (length L, width W, height H, unit: mm): 3500 ≥ L ≥ 1000, 2600 ≥ W ≥ 1000, 3500 ≥ H ≥ 2000. The energy storage system constructed based on the above scheme supports 1500V and 2000V, and the external dimensions of the energy storage system are exactly the same, providing different choices and meeting the expectations of end customers for product renewal. It is suitable for a variety of usage scenarios, such as large-scale power energy storage, industrial and commercial energy storage, etc., and can even replace some large-capacity outdoor energy storage cabinets. In addition, the benefits brought by the DC side voltage upgrade are obvious, such as: improvement in energy density, power density, cycle efficiency, and system efficiency, as well as reduction in the comprehensive cost per kilowatt-hour of the entire life cycle of the energy storage system.

[0133] In the embodiments of the present application, the content of analyzing the dimension constraint data and the number of battery boxes based on the dimension generation model with the number of battery boxes as the analysis parameter to infer the cell dimension data of the battery cells is introduced. By means of the dimension generation model, the dimension situation in the construction process of the energy storage system is estimated and analyzed, so as to construct the energy storage system more accurately and efficiently by integrating dimension data, the number of components (the number of battery cells, the number of battery boxes), etc., and improve the construction success rate and application accuracy of the energy storage system. In addition, a compatibility solution for an excellent energy storage system compatible with at least two system upper voltages is derived through a derivation method; it can be designed based on a standard 20-foot container, making the overall dimension and weight controllable, facilitating overall transportation and flexible project installation and deployment, and also improving the dimension and space utilization rate in the height and width directions of the container. Therefore, the container is convenient to transfer and does not require an extra-large lifting device, improving the utilization rate of the energy storage system.

[0134] In an alternative embodiment, the energy storage system constructed based on the above-described method for constructing an energy storage system is described as follows.

[0135] The energy storage system includes: battery boxes corresponding to the number of battery boxes. Among them, one battery box is constructed from battery cells with the number of the first battery cells, and the number of the first battery cells is determined based on the greatest common divisor of at least two numbers of battery cells. The at least two numbers of battery cells are obtained based on the cell voltage of the battery cells and at least two system upper voltages. The i-th system upper voltage corresponds to the i-th number of battery cells, where i is a positive integer. Among them, the at least two system upper 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 cells used to construct the energy storage system; the energy storage system supports different system upper voltages when the battery boxes with the number of battery boxes are connected in different connection manners.

[0136] In some embodiments, a single battery box corresponds to a battery box voltage, and the battery box voltage is determined based on the number of the first battery cells and the cell voltage; among them, the number of battery boxes is determined based on the number of system battery boxes corresponding to at least two system upper voltages respectively. The number of system battery boxes corresponding to at least two system upper voltages respectively is determined based on the quotient of at least two system upper voltages and the battery box voltage respectively. The k-th number of system battery boxes is used to represent the minimum number of battery boxes in the energy storage system that supports the k-th system upper voltage, where k is a positive integer.

[0137] In some embodiments, the number of battery boxes is the least common multiple of the number of system battery boxes corresponding to at least two system upper voltages respectively.

[0138] 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 battery boxes in the first system, and the second system upper limit voltage corresponds to the number of battery boxes in the second system; obtain the least common multiple between the number of battery boxes in the first system and the number of battery boxes in the second system as the number of battery boxes for constructing the energy storage system.

[0139] In some embodiments, the number of first battery cells is the greatest common divisor of at least two numbers of battery cells.

[0140] In some embodiments, for a battery module with a number of modules, each single battery module includes battery cells with a second number of battery cells. The battery modules are used to construct battery boxes. The second number of battery cells is the greatest common divisor of at least two numbers of battery cells, and the number of first battery cells is the product of the second number of battery cells and the number of modules.

[0141] In some embodiments, when the energy storage system supports the first system upper limit voltage, connect the battery boxes with the number of battery boxes in the first system in series to obtain a first number of parallel-connected first battery clusters. Among them, the number of battery boxes in the first system is the quotient of the first system upper limit voltage divided by the battery box voltage; the first number of parallel connections is the quotient of the number of battery boxes divided by the number of battery boxes in the first system. At least two system upper limit voltages include the second system upper limit voltage. Schematically, the first number of parallel connections is the number of battery clusters determined under the first system upper limit voltage, and the number of battery boxes in the first system is the number of battery boxes in a single battery cluster determined under the first system upper limit voltage, so as to flexibly determine the battery cluster division of the energy storage system when supporting the first system upper limit voltage.

[0142] In some embodiments, when the energy storage system supports the second system upper limit voltage, connect the battery boxes with the number of battery boxes in the second system in series to obtain a second number of parallel-connected second battery clusters. Among them, the number of battery boxes in the second system is the quotient of the second system upper limit voltage divided by the battery box voltage; the second number of parallel connections is the quotient of the number of battery boxes divided by the number of battery boxes in the second system. At least two system upper limit voltages include the second system upper limit voltage. Schematically, the second number of parallel connections is the number of battery clusters determined under the second system upper limit voltage, and the number of battery boxes in the second system is the number of battery boxes in a single battery cluster determined under the second system upper limit voltage, so as to flexibly determine the battery cluster division of the energy storage system when supporting the second system upper limit voltage.

[0143] It should be noted that the above energy storage system is only a schematic example, and the relevant content can be referred to the above embodiments, and will not be elaborated here.

[0144] Figure 12 It is the structural block diagram of the construction device of the energy storage system provided by an exemplary embodiment of the present application, as Figure 12As shown, the device includes the following parts: An acquisition module 1210, configured to acquire the cell voltage and at least two system upper limit voltages, where the at least two system upper limit voltages are at least two voltage upper limits preset for compatibility with the energy storage system, and the cell voltage is the voltage of the battery cells used to construct the energy storage system; The acquisition module 1210 is further configured to determine the number of cells corresponding to each of the at least two system upper limit voltages based on the cell voltage, obtaining 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; A determination module 1220, configured to determine the common divisor of the at least two cell numbers, and determine the first cell number of the battery cells used to construct the battery box based on the common divisor; A construction module 1230, configured to determine the number of battery boxes of the battery box based on the first cell number, and construct the energy storage system according to the number of battery boxes, where the energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection manners.

[0145] In an optional embodiment, the construction module 1230 is further configured to determine the battery box voltage of a single battery box composed of the battery cells with the first cell number; determine the quotient of each of the at least two system upper limit voltages and the battery box voltage, obtaining the system battery box numbers corresponding to the at least two system upper limit voltages respectively, where the k-th system battery box number is used to represent the minimum number of battery boxes in the energy storage system that supports the k-th system upper limit voltage, and k is a positive integer; based on the system battery box numbers corresponding to the at least two system upper limit voltages respectively, obtain the number of battery boxes of the energy storage system when the at least two system upper limit voltages are compatible.

[0146] In an optional embodiment, the construction module 1230 is further configured to obtain the least common multiple of the system battery box numbers corresponding to the at least two system upper limit voltages respectively, as the number of battery boxes of the energy storage system used to be constructed.

[0147] In an optional embodiment, the determination module 1220 is further configured to use the greatest common divisor of the at least two cell numbers as the first cell number of the battery cells used to construct the battery box.

[0148] In an optional embodiment, the determination module 1220 is further configured to use the greatest common divisor of the at least two cell numbers as the second cell number of the battery cells used to construct a single battery module; obtain the number of modules of the battery modules used to construct a single battery box based on the second cell number; where the first cell number is the product of the second cell number and the number of modules.

[0149] In an alternative embodiment, the determining module 1220 is further configured to determine the quotient of each of the at least two system upper limit voltages and the cell voltage, so as to obtain the number of cells corresponding to each of the at least two system upper limit voltages.

[0150] In an alternative embodiment, the at least two system upper limit voltages include a first system upper limit voltage and a second system upper limit voltage; The constructing module 1230 is further configured to connect the cells in the number of the first cells in series to obtain a single battery box, and obtain the number of battery boxes; The determining module 1220 is further configured to determine the quotient of the first system upper limit voltage and the battery box voltage to obtain the number of the 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 supporting 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 the second system battery boxes corresponding to the second system upper limit voltage; based on the number of the second system battery boxes and the number of battery boxes, connect the number of battery boxes in a second connection manner to obtain the energy storage system supporting the second system upper limit voltage.

[0151] In an alternative embodiment, the determining module 1220 is further configured to obtain the quotient of the number of battery boxes and the number of the first system battery boxes to obtain a first parallel number; connect the number of the first system battery boxes in series to obtain the first battery clusters in the first parallel number; connect the first battery clusters in the first parallel number in parallel to obtain the energy storage system supporting the first system upper limit voltage.

[0152] In an alternative embodiment, the determining module 1220 is further configured to obtain the quotient of the number of battery boxes and the number of the second system battery boxes to obtain a second parallel number; connect the number of the second system battery boxes in series to obtain the second battery clusters in the second parallel number; connect the second battery clusters in the second parallel number in parallel to obtain the energy storage system supporting the second system upper limit voltage.

[0153] In an optional embodiment, the building block 1230 is further configured to obtain the size constraint data of the energy storage system, where the size constraint data is used to constrain the array arrangement of at least one component in the energy storage system from the dimension dimension; analyze the size constraint data and the number of battery boxes through a size generation model to obtain the battery box size data of a single battery box in the energy storage system, where the size generation model is a trained mathematical model, and the size generation model learns the association relationship between the size constraint data and the size data of at least one component during the training process; analyze the battery box size data and the number of the first battery cells through the size generation model to obtain the cell size data of a single battery cell in the energy storage system; and construct the energy storage system by using the first battery boxes with the number of the battery boxes under the constraints of the cell size data and the battery box size data.

[0154] It should be noted that for the building device of the energy storage system provided in the above embodiment, only the division of the above functional modules is used for illustration. In actual application, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the building device of the energy storage system provided in the above embodiment and the embodiment of the building method of the energy storage system belong to the same concept, and the specific implementation process can be seen in the method embodiment, which will not be elaborated here.

[0155] Figure 13FIG. shows a schematic structural diagram of a server provided by an exemplary embodiment of the present application. Specifically, it includes the following structure. 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 central processing unit 1301. Server 1300 also includes a mass storage device 1306 for storing an operating system 1313, application programs 1314, and other program modules 1315. The mass storage device 1306 is connected to the central processing unit 1301 through a mass storage controller (not shown) connected to the system bus 1305. The mass storage device 1306 and its associated computer-readable medium provide non-volatile storage for server 1300. Without loss of generality, the computer-readable medium may include computer storage media and communication media. Computer storage media includes 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 may be collectively referred to as memory. According to various embodiments of the present application, server 1300 may also run on a remote computer on the network through a network such as the Internet. That is, server 1300 may be connected to network 1312 through a network interface unit 1311 connected to the system bus 1305. The above-mentioned memory further includes one or more programs, and one or more programs are stored in the memory and configured to be executed by the CPU.

[0156] Optionally, the computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), solid state drives (SSD), or optical discs, etc. Among them, the random access memory may include resistive random access memory (ReRAM) and dynamic random access memory (DRAM). The serial numbers of the embodiments of the present application above are only for description and do not represent the advantages or disadvantages of the embodiments. Those of ordinary skill in the art can understand that all or part of the steps for implementing the above embodiments can be completed by hardware, or can be completed by a program instructing related hardware. The program can be stored in a computer-readable storage medium. The storage medium mentioned above can be read-only memory, a magnetic disk, or an optical disc, etc. The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for constructing an energy storage system, characterized in that, The method includes: 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 voltage upper limits preset for compatibility with the energy storage system, and the cell voltage is the voltage of the battery cells used to construct the energy storage system; Determining the number of cells corresponding to each of the at least two system upper limit voltages based on the cell voltage, obtaining 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; Determining the greatest common divisor of the at least two cell numbers, and determining, based on the greatest common divisor, the first number of cells of the battery cells used to construct the battery box; Determining the number of battery boxes of the battery box based on the first number of cells, and constructing the energy storage system according to the number of battery boxes, where the energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection manners.

2. The method according to claim 1, characterized in that, The determining the number of battery boxes of the battery box based on the first number of cells includes: Determining the battery box voltage of a single battery box composed of the battery cells with the first number of cells; Determining the quotient of each of the at least two system upper limit voltages and the battery box voltage, obtaining the system battery box numbers corresponding to the at least two system upper limit voltages respectively, where the k-th system battery box number is used to represent the minimum number of battery boxes in the energy storage system that supports the k-th system upper limit voltage, and k is a positive integer; Obtaining the number of battery boxes of the energy storage system when compatible with the at least two system upper limit voltages based on the system battery box numbers corresponding to the at least two system upper limit voltages respectively.

3. The method according to claim 2, wherein The obtaining the number of battery boxes of the energy storage system when compatible with the at least two system upper limit voltages based on the system battery box numbers corresponding to the at least two system upper limit voltages respectively includes: Obtaining the least common multiple of the system battery box numbers corresponding to the at least two system upper limit voltages respectively as the number of battery boxes of the 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 greatest common divisor, the first number of cells of the battery cells used to construct the battery box includes: Taking the greatest common divisor of the at least two cell numbers as the first number of cells 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 greatest common divisor, the first number of cells of the battery cells used to construct the battery box includes: Taking the greatest common divisor of the at least two cell numbers as the second number of cells of the battery cells used to construct a single battery module; Obtaining the number of modules of the battery modules used to construct a single battery box based on the second number of cells; where the first number of cells is the product of the second number of cells and the number of modules.

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

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; Constructing the energy storage system according to the number of the battery boxes includes: Connecting the battery cells with the number of the first battery cells in series to obtain a single battery box, and obtaining the number of battery boxes of the battery boxes; Determining the battery box voltage of a single battery box composed of the battery cells with the number of the first battery cells; Determining the quotient of the first system upper limit voltage and the battery box voltage to obtain the number of the first system battery boxes corresponding to the first system upper limit voltage; connecting the number of the battery boxes in a first connection manner based on the number of the first system battery boxes and the number of the battery boxes to obtain the energy storage system supporting the first system upper limit voltage; or Determining the quotient of the second system upper limit voltage and the battery box voltage to obtain the number of the second system battery boxes corresponding to the second system upper limit voltage; connecting the number of the battery boxes in a second connection manner based on the number of the second system battery boxes and the number of the battery boxes to obtain the energy storage system supporting the second system upper limit voltage.

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

9. The method according to claim 7, wherein The connecting the number of the battery boxes in a second connection manner based on the number of the second system battery boxes and the number of the battery boxes to obtain the energy storage system supporting the second system upper limit voltage includes: Obtaining the quotient of the number of the battery boxes and the number of the second system battery boxes to obtain the second parallel connection number; Connecting the number of the second system battery boxes in series to obtain the second number of battery clusters of the second parallel connection number; Connecting the second number of battery clusters of the second parallel connection number in parallel to obtain the energy storage system supporting the second system upper limit voltage.

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

11. An energy storage system, characterized in that, The system includes: Battery boxes corresponding to the number of battery boxes; wherein, one battery box is constructed by battery cells with the number of the first battery cells, and the number of the first battery cells is determined based on the greatest common divisor of at least two numbers of battery cells. The at least two numbers of battery cells are obtained based on the cell voltage 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; Wherein, the at least two system upper limit voltages are at least two voltage upper limits preset for compatibility with the 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 with the number of battery boxes are connected in different connection manners.

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

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

14. The system according to any one of claims 11 to 13, wherein, The number of the first battery cells is the greatest common divisor of the at least two numbers of battery cells.

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

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

18. A construction device for an energy storage system, characterized in that, The device includes: an acquisition module, configured to acquire the cell voltage and at least two system upper limit voltages, where the at least two system upper limit voltages are at least two voltage upper limits preset for compatibility with the energy storage system, and the cell voltage is the voltage of the battery cells used to construct the energy storage system; The acquisition module is further configured to determine the number of cells corresponding to the at least two system upper limit voltages respectively based on the cell voltage, 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; a determination module, configured to determine the common divisor of the at least two cell numbers, and determine the first cell number of the battery cells used to construct the battery box based on the common divisor; a construction module, configured to determine the number of battery boxes of the battery box based on the first cell number, and construct the energy storage system according to the number of battery boxes, where the energy storage system supports different system upper limit voltages when the battery boxes are connected in different connection manners.

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

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

21. A computer program product, characterized in that, It includes computer instructions, and when the computer instructions are executed by a processor, the construction method of the energy storage system according to any one of claims 1 to 10 is implemented.

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