Energy storage battery cluster, energy storage battery system and construction method and device

Abstract

The application provides an energy storage battery cluster, an energy storage battery system and a construction method and device, wherein the energy storage battery cluster comprises: a first preset number of lithium ion battery modules; and a second preset number of sodium ion battery modules, which are connected in series with the first preset number of lithium ion battery modules to form a hybrid series module, a wiring port of the hybrid series module is used for electrically connecting an energy storage converter, and an operating voltage range of the hybrid series module is within an operating voltage range of the energy storage converter. The application scheme can improve the conversion efficiency of the sodium ion battery system and reduce the system cost.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of electrochemical energy storage technology, and in particular to an energy storage battery cluster, an energy storage battery system, and a method and apparatus for constructing it. Background Technology

[0002] Electrochemical energy storage is a crucial flexible resource in the construction of new power systems. Currently, lithium-ion batteries account for a large proportion of installed electrochemical energy storage capacity and are the most important form of electrochemical energy storage. Sodium-ion batteries share similar comprehensive electrochemical performance and a nearly identical industrial chain foundation with lithium-ion batteries, making them one of the most promising new energy storage forms for addressing the future lithium resource shortage crisis. However, due to their wide operating voltage range, sodium-ion batteries currently employ bipolar energy storage converters. This involves adding a DC / DC converter to the DC side of a unipolar energy storage converter to create a bipolar converter to meet operational requirements. However, the high cost of DC / DC converters increases the overall cost of sodium-ion battery energy storage systems. Furthermore, due to the efficiency losses inherent in DC / DC converters, bipolar energy storage converters are less efficient than unipolar converters, thus reducing the effective capacity of the system. Therefore, improving the conversion efficiency of sodium-ion battery systems and reducing system costs are pressing technical challenges in the field of electrochemical energy storage research. Summary of the Invention

[0003] This application provides an energy storage battery cluster, an energy storage battery system, and a method and apparatus for constructing it, in order to solve the technical problem of how to improve the conversion efficiency and reduce the system cost of sodium-ion battery systems in the prior art.

[0004] The first aspect of the present invention provides an energy storage battery cluster, comprising: a first preset number of lithium-ion battery modules; a second preset number of sodium-ion battery modules, wherein the second preset number of sodium-ion battery modules and the first preset number of lithium-ion battery modules are connected in series to form a hybrid series module, wherein the wiring ports of the hybrid series module are used for electrically connecting to an energy storage converter, and the operating voltage range of the hybrid series module is within the operating voltage range of the energy storage converter.

[0005] The energy storage battery cluster provided in this invention constructs a hybrid series module by using a combination of lithium-ion battery modules and sodium-ion battery modules connected in series within the energy storage battery cluster. In the hybrid series module, the introduction of lithium-ion battery modules with narrower operating voltages narrows the operating voltage window of sodium-ion battery modules, enabling them to perform AC / DC conversion using unipolar energy storage converters; furthermore, the introduction of sodium-ion battery modules reduces the cost of lithium-ion battery modules. Therefore, the battery cluster based on the hybrid series connection of lithium-ion battery modules and sodium-ion battery modules, on the one hand, narrows the operating voltage range compared to sodium-ion battery energy storage clusters, making it compatible with unipolar energy storage converters, thereby improving conversion efficiency and reducing costs; on the other hand, compared to lithium-ion battery energy storage clusters, the introduction of sodium-ion battery modules reduces the cost of battery modules, thereby significantly reducing the cost of the energy storage system.

[0006] Optionally, the lithium-ion battery module and the sodium-ion battery module in the hybrid series module are arranged in space according to a preset number of rows or columns.

[0007] Optionally, battery modules in the same row are connected in series, and battery modules in adjacent rows are connected in series; or battery modules in adjacent rows are connected in series alternately.

[0008] Optionally, battery modules in the same column are connected in series, and battery modules in adjacent columns are connected in series; or battery modules in adjacent columns are connected in series alternately.

[0009] Optionally, the physical property data of the lithium-ion battery module and the sodium-ion battery module meet the consistency requirements.

[0010] A second aspect of the present invention provides an energy storage battery system, comprising: an energy storage battery cluster as described in the first aspect or any alternative to the first aspect; and an energy storage converter, one side of which is electrically connected to the wiring port of the energy storage battery cluster, and the other side of which is used for connection to an external power grid.

[0011] A third aspect of the present invention provides a method for constructing an energy storage battery cluster as described in any of the first aspects or an energy storage battery system as described in the second aspect, comprising: determining the operating voltage range of an energy storage inverter based on a received energy storage battery cluster to be constructed and the required operating voltage ranges of lithium-ion battery modules and sodium-ion battery modules; determining, based on the operating voltage ranges of the energy storage battery cluster to be constructed, the lithium-ion battery modules, and the sodium-ion battery modules, the mixing ratio and the number of series-connected lithium-ion battery modules in the same battery cluster, such that the operating voltage of the mixed series-connected modules matches the operating voltage of the energy storage inverter, wherein the mixing ratio and the series-connected data are used to guide the construction of the energy storage battery cluster.

[0012] A fourth aspect of the present invention provides an apparatus for constructing an energy storage battery cluster as described in any of the first aspects or an energy storage battery system as described in the second aspect, comprising: a first determining module, configured to determine the operating voltage range of an energy storage inverter based on a received energy storage battery cluster to be constructed and the required operating voltage ranges of lithium-ion battery modules and sodium-ion battery modules, and based on the operating voltage range of the energy storage battery cluster to be constructed; and a second determining module, configured to determine, based on the operating voltage ranges of the energy storage inverter, lithium-ion battery modules, and sodium-ion battery modules, the mixing ratio and the number of series-connected lithium-ion battery modules in the same battery cluster, such that the operating voltage of the mixed series-connected modules matches the operating voltage of the energy storage inverter, wherein the mixing ratio and the series-connected data are used to guide the construction of the energy storage battery cluster.

[0013] The functions performed by the components in the apparatus provided by the present invention for constructing an energy storage battery cluster as described in any of the first aspects or an energy storage battery system as described in the second aspect have all been applied in any of the method embodiments of the third aspect described above, and therefore will not be repeated here.

[0014] The fifth aspect of the present invention provides a computer device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; the memory is used to store computer programs; and the processor is used to implement the steps of the method of constructing an energy storage battery cluster as described in any one of the first aspects or an energy storage battery system as described in the second aspect when executing the program stored in the memory.

[0015] The sixth aspect of the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to perform a method for constructing an energy storage battery cluster as described in any of the first aspects or an energy storage battery system as described in the second aspect, as provided in the third aspect of the present invention. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an energy storage battery cluster structure provided in an embodiment of the present invention;

[0018] Figure 2This is a schematic diagram of an energy storage battery cluster structure provided in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of an energy storage battery cluster structure provided in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of an energy storage battery cluster structure provided in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of an energy storage battery system structure provided in an embodiment of the present invention;

[0022] Figure 6 This is a schematic flowchart of a method for constructing an energy storage battery cluster or an energy storage battery system according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of a device structure for constructing an energy storage battery cluster or an energy storage battery system, provided by an embodiment of the present invention.

[0024] Figure 8 This is a schematic diagram of a computer device structure provided in an embodiment of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0026] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “a,” “an,” or “the,” as used in this disclosure, do not indicate a limitation of quantity, but rather indicate the presence of at least one. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0027] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] To address the technical problems mentioned in the background section, embodiments of the present invention provide an energy storage battery cluster, such as... Figure 1 As shown, it includes:

[0029] The first preset number of lithium-ion battery modules.

[0030] A second preset number of sodium-ion battery modules are connected in series with the first preset number of lithium-ion battery modules to form a hybrid series module. The wiring ports of the hybrid series module are used to electrically connect to the energy storage converter. The operating voltage range of the hybrid series module is within the operating voltage range of the energy storage converter.

[0031] For example, energy storage converters can be categorized into unipolar and bipolar types based on whether a DC / DC converter is required on the DC side. Unipolar energy storage converters do not have a DC / DC converter on the DC side, while bipolar energy storage converters do. Lithium-ion battery modules have a narrower operating voltage range, while sodium-ion batteries have a wider operating voltage range. By connecting a second preset number of sodium-ion battery modules in series with a first preset number of lithium-ion battery modules to construct a hybrid series module, the operating voltage range of the hybrid series model falls within the operating voltage range of the energy storage converter. This allows for a unipolar design of the hybrid series module, eliminating the need for a DC / DC converter on the DC side of the energy storage converter. To achieve unipolar design, the hybrid series module requires a mixing ratio and series quantity of lithium-ion and sodium-ion battery modules that must be within the operating voltage range of the unipolar energy storage converter. The mixing ratio and series quantity can be used to determine a first preset quantity and a second preset quantity, guiding the construction of the energy storage battery cluster so that the operating voltage of the hybrid series module matches the operating voltage of the energy storage converter. Specifically, let the operating voltage range of the energy storage converter be V. min ~V max A cluster contains N lithium-ion battery modules and M sodium-ion battery modules connected in series. The operating voltage ranges of the lithium-ion battery modules and the sodium-ion battery modules are respectively V. Li,min ~V Li,max With V Na,min ~V Na,max Then the following constraints must be met:

[0032] N·V Li,max +M·V Na,max <V max

[0033] N·V Li,min +M·V Na,min >V min

[0034] For example, in a hybrid series module, sodium-ion battery modules and lithium-ion battery modules are fully connected in series within the same cluster and can be freely arranged and combined. The number of modules connected in series is two or more, and there is at least one sodium-ion battery and one lithium-ion battery.

[0035] The energy storage battery cluster provided in this invention constructs a hybrid series module by using a combination of lithium-ion battery modules and sodium-ion battery modules connected in series within the energy storage battery cluster. In the hybrid series module, the introduction of lithium-ion battery modules with narrower operating voltages narrows the operating voltage window of sodium-ion battery modules, enabling them to perform AC / DC conversion using unipolar energy storage converters; furthermore, the introduction of sodium-ion battery modules reduces the cost of lithium-ion battery modules. Therefore, the battery cluster based on the hybrid series connection of lithium-ion battery modules and sodium-ion battery modules, on the one hand, narrows the operating voltage range compared to sodium-ion battery energy storage clusters, making it compatible with unipolar energy storage converters, thereby improving conversion efficiency and reducing costs; on the other hand, compared to lithium-ion battery energy storage clusters, the introduction of sodium-ion battery modules reduces the cost of battery modules, thereby significantly reducing the cost of the energy storage system.

[0036] As an optional embodiment of the present invention, the lithium-ion battery module and the sodium-ion battery module in the hybrid series module are arranged in space according to a preset number of rows or columns.

[0037] For example, the preset number of rows or columns can be determined, but is not limited to, based on constraints such as the number of lithium-ion battery modules and sodium-ion battery modules in the hybrid series module, and the spatial shape or size of the space where the hybrid series module is installed. Those skilled in the art can determine this according to actual needs, and no limitations are imposed here. The spatial arrangement can be determined, but is not limited to, based on the heat dissipation and wiring requirements of the hybrid series module. Those skilled in the art can determine this according to actual needs, and no limitations are imposed here. Specifically, the lithium-ion battery modules and sodium-ion battery modules in the hybrid series module can be arranged in the same row or column, with the same type of battery module, such as... Figure 2 The spatial arrangement shown is suitable for installation in locations where the length and width of the space differ significantly. The energy storage battery cluster consists of two rows of 24 modules connected in series. The first row contains 12 lithium-ion battery modules (1), and the second row contains 12 sodium-ion battery modules (2). Since the sodium-ion battery modules are larger than the lithium-ion batteries, the space required for the second row of battery racks is greater than that for the first row. This spatial arrangement facilitates the subsequent processing and design of mechanical structures (such as housings) and improves the space utilization rate of the mechanical structure. Figure 3 The spatial arrangement shown is suitable for installation in spaces where the length and width are not significantly different. The energy storage battery cluster consists of 24 modules connected in series in six rows and four columns. Rows one through five contain 16 lithium-ion battery modules (1), while rows three and six contain 8 sodium-ion battery modules (2). Since the sodium-ion battery modules are larger than the lithium-ion modules, the battery rack space in rows three and six is ​​greater than in other rows. This spatial arrangement facilitates the subsequent processing and design of mechanical structures (such as the casing), improving the space utilization of the mechanical structure. Alternatively, different types of battery modules can be arranged alternately in the same row or column, such as... Figure 4As shown; or other methods that can achieve a uniform spatial arrangement of lithium-ion battery modules and sodium-ion battery modules in a hybrid series module, which are not limited here.

[0038] The energy storage battery cluster provided in this embodiment of the invention allows for different spatial arrangements of lithium-ion battery modules and sodium-ion battery modules in a hybrid series module, based on various reference factors such as battery type, space size, and wiring length. This design offers high flexibility and adaptability while reducing design costs.

[0039] As an optional embodiment of the present invention, battery modules in the same row are connected in series, and battery modules in adjacent rows are connected in series; or battery modules in adjacent rows are connected in series alternately.

[0040] For example, such as Figure 3 As shown, the positive terminal of the leftmost lithium-ion battery module is terminal 3 (total positive), and its negative terminal is connected to the positive terminal of the lithium-ion battery module in the first row and second column. This process is repeated to connect eight lithium-ion battery modules in series. The negative terminal of the lithium-ion battery module in the second row and first column is connected to the positive terminal of the sodium-ion battery module in the third row and first column, and then four sodium-ion battery modules are connected in series. Similarly, eight lithium-ion battery modules and four sodium-ion battery modules are connected in series. The negative terminal of the sodium-ion battery module in the sixth row and first column is terminal 4 (total negative). This series connection method can shorten the wiring length, reduce line loss, and save costs. Figure 4 As shown, the series connection logic of lithium-ion battery modules and sodium-ion battery modules in a hybrid series module is similar and will not be repeated here. It should be noted that the series connection of battery modules between adjacent rows can also be achieved by connecting the rightmost module of the previous row to the leftmost module of the next row. Those skilled in the art can determine this according to actual needs, and no restrictions are imposed here.

[0041] For example, such as Figure 2 As shown, the positive terminal of the leftmost lithium-ion battery module is always positive, and its negative terminal is connected to the positive terminal of the leftmost sodium-ion battery module. The negative terminal of this module is connected to the positive terminal of the second row of lithium-ion battery modules, and so on. Lithium-ion battery modules and sodium-ion battery modules are arranged alternately. The negative terminal of the rightmost sodium-ion battery module is always negative. This series connection method can shorten the wiring length, reduce line loss, and save costs.

[0042] As an optional embodiment of the present invention, battery modules in the same column are connected in series, and battery modules in adjacent columns are connected in series; or battery modules in adjacent columns are connected in series alternately.

[0043] This embodiment is similar to the description of the corresponding part above, and will not be repeated here.

[0044] As an optional embodiment of the present invention, the physical property data of the lithium-ion battery module and the sodium-ion battery module meet the consistency requirements.

[0045] For example, physical attributes may include, but are not limited to, capacity and lifespan, or may be added or removed by those skilled in the art as needed, without limitation. Taking capacity and lifespan as physical attributes as an example, a hybrid series battery module is designed by selecting lithium-ion battery modules and sodium-ion battery modules with similar capacities and lifespans.

[0046] The energy storage battery cluster provided in this embodiment of the invention screens lithium-ion battery modules and sodium-ion battery modules based on different physical properties, so that the physical properties are consistent, ensuring that they work at the same rate and guaranteeing the reliability of the hybrid series module's working performance.

[0047] This invention provides an energy storage battery system, such as... Figure 5 As shown, it includes:

[0048] The energy storage battery cluster in any of the above embodiments.

[0049] An energy storage converter, one side of which is electrically connected to the wiring port of the energy storage battery cluster, and the other side of which is used to connect to the external power grid.

[0050] In this embodiment, the energy storage converter is a unipolar energy storage converter. For details on the specific implementation of this embodiment, please refer to the description in the corresponding section above, which will not be repeated here.

[0051] The energy storage battery system provided in this invention constructs a hybrid series module by using a combination of lithium-ion battery modules and sodium-ion battery modules connected in series within the energy storage battery cluster. In this hybrid series module, the introduction of lithium-ion battery modules narrows the operating voltage window of the sodium-ion battery modules, enabling AC / DC conversion using a unipolar energy storage converter; the introduction of sodium-ion battery modules also reduces the cost of lithium-ion battery modules. Therefore, based on the battery cluster of hybrid series-connected lithium-ion and sodium-ion battery modules, and using a unipolar energy storage converter, on the one hand, compared to sodium-ion battery energy storage clusters, the operating voltage range is narrowed, making it compatible with unipolar energy storage converters, thereby improving conversion efficiency and reducing costs; on the other hand, compared to lithium-ion battery energy storage clusters, the introduction of sodium-ion battery modules reduces the cost of the battery modules, thus significantly reducing the cost of the energy storage system.

[0052] This invention provides a method for constructing an energy storage battery cluster or energy storage battery system in any of the above embodiments, such as... Figure 6 As shown, the method includes the following steps:

[0053] Step S110: Based on the received energy storage battery cluster to be constructed and the required operating voltage range of the lithium-ion battery module and sodium-ion battery module, determine the operating voltage range of the energy storage converter based on the operating voltage range of the energy storage battery cluster to be constructed.

[0054] Step S120: Based on the operating voltage range of the energy storage converter, lithium-ion battery module, and sodium-ion battery module, determine the mixing ratio and series connection quantity of lithium-ion battery module and sodium-ion battery module in the same battery cluster, so that the operating voltage of the mixed series module matches the operating voltage of the energy storage converter. The mixing ratio and the series connection data are used to guide the construction of the energy storage battery cluster.

[0055] For example, the operating voltage range of the energy storage battery cluster can be determined according to the actual application requirements of the energy storage system. The operating voltage range of the lithium-ion battery module and the sodium-ion battery module can be determined, but is not limited to, the operating voltage range of the finished battery module, or a pre-specified operating voltage range, or other methods known to those skilled in the art, and is not limited here. To achieve unipolar design, the mixing ratio and series number of lithium-ion and sodium-ion battery modules in the hybrid series module need to be ensured to be within the operating voltage range of the unipolar energy storage converter. Specifically, let the operating voltage range of the energy storage converter be V. min ~V max A cluster contains N lithium-ion battery modules and M sodium-ion battery modules connected in series. The operating voltage ranges of the lithium-ion battery modules and the sodium-ion battery modules are respectively V. Li,min ~V Li,max With V Na,min ~V Na,max Then the following constraints must be met:

[0056] N·V Li,max +M·V Na,max <V max

[0057] N·V Li,min +M·V Na,min >V min

[0058] Based on the constraints given by the above inequalities, the range of quantities for lithium-ion and sodium-ion battery modules can be determined. The mixing ratio and number of lithium-ion and sodium-ion battery modules in the hybrid series module can then be determined according to actual needs. For example, to reduce costs, the proportion of sodium-ion battery modules can be appropriately increased; to reduce size, the proportion of lithium-ion battery modules can be appropriately increased. In practical applications, the appropriate mixing ratio and number of modules can be determined by comprehensively considering the weights of each constraint.

[0059] For example, such as Figure 2 As shown, assuming the received operating voltage range of the energy storage battery cluster to be constructed is 950V~1400V, then the sodium-ion battery cells selected are 200Ah cells with an operating voltage range of 2.2V~3.95V, and the lithium-ion battery cells are 200Ah cells with an operating voltage range of 2.5V~3.65V. The sodium-ion battery modules use a 1P16S (1 parallel 16 series) string configuration, with an operating voltage range of 35.2V~63.2V; the lithium-ion battery modules use a 1P16S string configuration, with an operating voltage range of 40V~58.4V. This cluster consists of two rows of 24 modules connected in series. The first row contains 12 lithium-ion battery modules, and the second row contains 12 sodium-ion battery modules. The operating voltage range of this cluster is 902.4V~1459.2V, and a unipolar energy storage converter with an operating voltage range of 900V~1500V can be used.

[0060] For example, such as Figure 3 As shown, assuming the received energy storage battery cluster to be constructed has an operating voltage range of 950V to 1400V, the sodium-ion battery cells are selected as 200Ah cells with an operating voltage range of 2.1V to 3.95V, and the lithium-ion battery cells are selected as 200Ah cells with an operating voltage range of 2.5V to 3.65V. The sodium-ion battery modules use a 1P16S string configuration, resulting in an operating voltage range of 33.6V to 63.2V; the lithium-ion battery modules use a 1P16S string configuration, resulting in an operating voltage range of 40V to 58.4V. This cluster consists of 24 modules connected in series in six rows and four columns. The first, second, fourth, and fifth rows are lithium-ion battery modules (16 in total), and the third and sixth rows are sodium-ion battery modules (8 in total). The operating voltage range of this cluster is 908.8V to 1440V, and a unipolar energy storage converter with an operating voltage range of 900V to 1500V can be used.

[0061] The method for constructing an energy storage battery cluster or energy storage battery system in any of the above embodiments provided by the present invention constructs a hybrid series module by using a mixed series connection of lithium-ion battery modules and sodium-ion battery modules within the energy storage battery cluster. At the same time, the working voltage of the hybrid series module is matched with the working voltage of the energy storage converter through quantitative calculation, enabling it to use a unipolar energy storage converter for AC-DC conversion, thereby reducing the cost of the energy storage system and improving the system conversion efficiency.

[0062] Figure 7 An apparatus for constructing an energy storage battery cluster or energy storage battery system according to an embodiment of the present invention includes:

[0063] The first determining module 810 is used to determine the operating voltage range of the energy storage converter based on the received energy storage battery cluster to be constructed and the required operating voltage ranges of the lithium-ion battery module and sodium-ion battery module, and based on the operating voltage range of the energy storage battery cluster to be constructed. For details, please refer to the descriptions of the corresponding parts in the above embodiments, which will not be repeated here.

[0064] The second determining module 820 is used to determine the mixing ratio and series connection quantity of the lithium-ion battery module and sodium-ion battery module in the same battery cluster based on the operating voltage range of the energy storage inverter, lithium-ion battery module, and sodium-ion battery module. This ensures that the operating voltage of the mixed series modules matches the operating voltage of the energy storage inverter. The mixing ratio and series connection data are used to guide the construction of the energy storage battery cluster. For details, please refer to the descriptions of the corresponding parts in the above embodiments, which will not be repeated here.

[0065] This invention provides a computer device, such as... Figure 8 As shown, the device includes one or more processors 3010 and a memory 3020, the memory 3020 including persistent memory, volatile memory, and a hard disk. Figure 8 Taking a processor 3010 as an example, the device may also include an input device 3030 and an output device 3040.

[0066] The processor 3010, memory 3020, input device 3030, and output device 3040 can be connected via a bus or other means. Figure 8 Taking the example of a connection between China and Israel via a bus.

[0067] Processor 3010 may include, but is not limited to, a Central Processing Unit (CPU) and a Graphics Processing Unit (GPU). Processor 3010 may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations thereof. The general-purpose processor may be a microprocessor or any conventional processor. Memory 3020 may include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a function; the data storage area may store data created based on the use of the means for constructing the energy storage battery cluster or energy storage battery system in any of the above embodiments. Furthermore, memory 3020 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 3020 may optionally include a memory remotely located relative to the processor 3010, and this remote memory may be connected via a network to means for constructing the energy storage battery cluster or energy storage battery system in any of the above embodiments. The input device 3030 may receive user input of calculation requests (or other numeric or character information) and generate key signal inputs related to the means for constructing the energy storage battery cluster or energy storage battery system in any of the above embodiments. The output device 3040 may include a display device such as a screen for outputting calculation results.

[0068] This invention provides a computer-readable storage medium that stores computer instructions. The computer storage medium stores computer-executable instructions that can execute the methods described in any of the above method embodiments for constructing an energy storage battery cluster or energy storage battery system. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium may also include combinations of the above types of memory.

[0069] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable storage medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable storage medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable storage media include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), fiber optic devices, and compact disc read-only memory (CDROM). Furthermore, computer-readable storage media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0070] It should be understood that various parts of this disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0071] In the description of this specification, the references to terms such as "this embodiment," "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples, without contradiction. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An energy storage battery cluster, characterized in that, include: The first preset number of lithium-ion battery modules; A second preset number of sodium-ion battery modules are connected in series with the first preset number of lithium-ion battery modules to form a hybrid series module. The wiring ports of the hybrid series module are used to electrically connect to a unipolar energy storage converter, which is an energy storage converter without a DC / DC converter installed on the DC side. The lithium-ion battery modules and sodium-ion battery modules in the hybrid series module are arranged in space according to a preset number of rows or columns. The operating voltage range of the hybrid series module is within the operating voltage range of the energy storage converter, satisfying the following conditions: N·V Li,max + M·V Na,max <V max N·V Li,min + M·V Na,min >V min Where N is the number of lithium-ion battery modules, and M is the number of sodium-ion battery modules; V Li,max V Li,min These are the maximum and minimum operating voltages of the lithium-ion battery module, respectively; V Na,max V Na,min These are the maximum and minimum operating voltages of the sodium-ion battery module, respectively; V max V min These are the maximum and minimum operating voltages of the unipolar energy storage converter, respectively. Meanwhile, the physical property data of the lithium-ion battery module and the sodium-ion battery module meet the consistency requirements, and the physical properties include capacity and lifespan.

2. The energy storage battery cluster according to claim 1, characterized in that, Battery modules in the same row are connected in series, and battery modules in adjacent rows are connected in series; or battery modules in adjacent rows are connected in series alternately.

3. The energy storage battery cluster according to claim 1, characterized in that, Battery modules in the same column are connected in series, and battery modules in adjacent columns are connected in series; or battery modules in adjacent columns are connected in series alternately.

4. An energy storage battery system, characterized in that, include: The energy storage battery cluster as described in any one of claims 1-3; An energy storage converter, one side of which is electrically connected to the wiring port of the energy storage battery cluster, and the other side of which is used to connect to the external power grid.

5. A method for constructing an energy storage battery cluster as described in any one of claims 1-3 or an energy storage battery system as described in claim 4, characterized in that, include: The operating voltage range of the energy storage converter is determined based on the received energy storage battery cluster to be constructed and the required operating voltage range of the lithium-ion battery module and sodium-ion battery module. Based on the operating voltage range of the energy storage converter, lithium-ion battery module, and sodium-ion battery module, the mixing ratio and series connection quantity of lithium-ion battery module and sodium-ion battery module in the same battery cluster are determined so that the operating voltage of the mixed series module matches the operating voltage of the energy storage converter. The mixing ratio and the series connection quantity are used to guide the construction of the energy storage battery cluster.

6. An apparatus for constructing an energy storage battery cluster as described in any one of claims 1-3 or an energy storage battery system as described in claim 4, characterized in that, include: The first determining module is used to determine the operating voltage range of the energy storage converter based on the received energy storage battery cluster to be constructed and the required operating voltage range of the lithium-ion battery module and sodium-ion battery module, and based on the operating voltage range of the energy storage battery cluster to be constructed. The second determining module is used to determine the mixing ratio and series connection quantity of the lithium-ion battery module and the sodium-ion battery module in the same battery cluster based on the operating voltage range of the energy storage inverter, the lithium-ion battery module and the sodium-ion battery module, so that the operating voltage of the mixed series module matches the operating voltage of the energy storage inverter. The mixing ratio and the series connection quantity are used to guide the construction of the energy storage battery cluster.

7. A computer device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, when executing a program stored in memory, implements the steps of the method for constructing an energy storage battery cluster as described in any one of claims 1-3 or an energy storage battery system as described in claim 4, as described in claim 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method for constructing an energy storage battery cluster as described in claim 5, or an energy storage battery system as described in claim 4.

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