Energy storage system liquid cooling unit selection method, electronic device and readable storage medium

Abstract

Embodiments of the present application disclose a method for selecting a liquid cooling unit of an energy storage system, an electronic device and a readable storage medium. The method comprises: determining a first heat generation power of a battery of the energy storage system in a first stage, a second heat generation power of the battery in a second stage and a heat absorption power of the battery, then determining a target refrigeration power of the liquid cooling unit according to the first heat generation power and the second heat generation power, and determining a target heating power of the liquid cooling unit according to the heat absorption power, and finally selecting the liquid cooling unit according to the target refrigeration power and the target heating power. The present application combines the heat generation power of the battery in different stages to design the refrigeration capacity of the liquid cooling unit, so as to meet the operation requirements of the battery in the whole life cycle, thereby slowing down the life attenuation of the battery, making the battery have a higher service life, and avoiding the design capacity of the refrigeration capacity and the heating capacity of the liquid cooling unit being too large, so that the power cost can be saved while ensuring that the battery can be stably operated at full power in the whole life cycle.

Description

Technical Field

[0001] This application relates to the field of liquid cooling technology, and in particular to a method for selecting liquid cooling units for an energy storage system, electronic equipment, and a readable storage medium. Background Technology

[0002] Liquid cooling technology is a technology that uses liquid as a cooling medium to transfer the heat generated by the heat-generating device to the outside of the device through the flow of the liquid, thereby achieving heat dissipation.

[0003] With the rapid development of the energy storage battery industry, liquid cooling and liquid heating have become the most common battery thermal management methods for energy storage containers. Cooling and heating are usually achieved through liquid cooling units, therefore, the design of the cooling and heating capacity of the liquid cooling units is crucial for the stable operation of the battery system throughout its entire life cycle. Summary of the Invention

[0004] This application provides a method for selecting liquid cooler units for energy storage systems, electronic equipment, and a readable storage medium. This method can avoid excessive design requirements for the cooling and heating capacity of liquid cooler units, thereby saving electricity costs while ensuring stable operation of the battery at full power throughout its entire life cycle.

[0005] In a first aspect, this application provides a method for selecting a liquid-cooled chiller unit for an energy storage system, which includes:

[0006] The first heat generation power of the battery in the energy storage system in the first stage, the second heat generation power in the second stage, and the heat absorption power of the battery are determined respectively.

[0007] The target cooling power of the liquid chiller is determined based on the first heating power and the second heating power, and the target heating power of the liquid chiller is determined based on the heat absorption power.

[0008] Select the appropriate liquid chiller unit based on the target cooling capacity and target heating capacity.

[0009] Secondly, this application also provides a liquid chiller unit selection device for an energy storage system, comprising:

[0010] The first determining unit is used to determine the first heating power of the battery in the energy storage system in the first stage, the second heating power in the second stage, and the heat absorption power of the battery.

[0011] The second determining unit is used to determine the target cooling power of the liquid chiller unit based on the first heating power and the second heating power, and to determine the target heating power of the liquid chiller unit based on the heat absorption power.

[0012] The selection unit is used to select liquid chiller units based on the target cooling capacity and target heating capacity.

[0013] Thirdly, embodiments of this application also provide an electronic device, including a memory storing multiple instructions; a processor loads instructions from the memory to execute the liquid cooler selection method for the energy storage system provided in the first aspect.

[0014] Fourthly, embodiments of this application also provide a computer-readable storage medium storing multiple instructions adapted for loading by a processor to execute the liquid-cooled unit selection method for the energy storage system provided in the first aspect.

[0015] Fifthly, embodiments of this application also provide a computer program product, including a computer program or instructions, wherein the computer program or instructions are executed by a processor using the liquid chiller selection method for the energy storage system provided in the first aspect.

[0016] In the liquid-cooled chiller selection method for energy storage systems provided in this application, the first heating power of the battery in the first stage, the second heating power in the second stage, and the heat absorption power of the battery are determined. Then, based on the first and second heating powers, the target cooling power of the liquid-cooled chiller is determined, and based on the heat absorption power, the target heating power of the liquid-cooled chiller is determined. Finally, the liquid-cooled chiller is selected based on the target cooling and heating powers. This application designs the cooling capacity of the liquid-cooled chiller by combining the heating power of the battery at different stages to meet the operating requirements of the battery throughout its entire life cycle. This can slow down battery life degradation, giving the battery a longer service life, and avoid excessive design of the cooling and heating capacity of the liquid-cooled chiller. Therefore, while ensuring stable operation of the battery at full power throughout its entire life cycle, it also saves on electricity costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A first flowchart illustrating the liquid cooling unit selection method for an energy storage system provided in this application embodiment;

[0019] Figure 2 This is a second flowchart illustrating the liquid-cooled unit selection method for an energy storage system provided in an embodiment of this application.

[0020] Figure 3 A schematic diagram of the third process for selecting a liquid-cooled unit for an energy storage system provided in this application embodiment;

[0021] Figure 4A schematic diagram of the fourth process for the liquid cooler unit selection method of the energy storage system provided in the embodiments of this application;

[0022] Figure 5 A schematic diagram of the fifth process of the liquid-cooled unit selection method for the energy storage system provided in the embodiments of this application;

[0023] Figure 6 A schematic diagram of the sixth step in the selection method for liquid-cooled units of an energy storage system provided in this application embodiment;

[0024] Figure 7 A schematic diagram of the seventh process for the selection method of liquid-cooled unit for energy storage system provided in the embodiments of this application;

[0025] Figure 8 A schematic diagram of the eighth process for the liquid cooling unit selection method of the energy storage system provided in the embodiments of this application;

[0026] Figure 9 A schematic block diagram of a liquid cooler unit selection device for an energy storage system provided in this application embodiment;

[0027] Figure 10 A schematic block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0030] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0031] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0032] Furthermore, in this application, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific implementation.

[0033] In related technologies, the following problems typically exist when designing the cooling and heating capacity of liquid chillers:

[0034] 1. There is no clear calculation method for the cooling and heating capacity of batteries, which means that the design of the cooling and heating capacity of liquid cooling units is based only on empirical values;

[0035] 2. The cooling capacity of the liquid cooling unit was designed based solely on the heat generated in the early stages of the battery life without considering the entire battery life cycle. This resulted in the battery system being unable to function properly due to insufficient cooling and heating supply in the middle or late stages of its life cycle.

[0036] 3. The liquid-cooled chiller has an excessively large design margin for cooling and heating, resulting in wasted electricity costs;

[0037] 4. When the ambient temperature is high, the cooling capacity of the liquid cooling unit is insufficient, resulting in excessive battery temperature rise and significant lifespan reduction. At the same time, when the temperature is low, the heating capacity of the liquid cooling unit is insufficient, and the battery cannot operate at full power, thus failing to meet the energy supply of the power grid.

[0038] To address this, this application provides a method for selecting a liquid chiller unit for an energy storage system, electronic equipment, and a readable storage medium. This provides a theoretical basis for the selection and design of liquid chillers. Specifically, it involves determining the first heating power of the battery in the first stage, the second heating power in the second stage, and the battery's heat absorption power. Then, based on the first and second heating powers, the target cooling power of the liquid chiller unit is determined, and based on the heat absorption power, the target heating power is determined. Finally, the liquid chiller unit is selected based on the target cooling and heating powers. This application designs the cooling capacity of the liquid chiller unit by combining the heating power of the battery at different stages to meet the battery's full lifespan operation requirements. This slows down battery degradation, extending battery lifespan and avoiding excessive design requirements for the cooling and heating capacity of the liquid chiller unit. Ultimately, this ensures stable operation of the battery at full power throughout its entire lifespan while saving on electricity costs.

[0039] Please see Figure 1 , Figure 1 This is a flowchart illustrating the liquid chiller selection method for an energy storage system provided in this application embodiment. The liquid chiller selection method for an energy storage system provided in this application embodiment is applied to a terminal device, and the method is executed through application software installed on the terminal device. The terminal device can be a desktop computer, laptop computer, tablet computer, mobile phone, electric vehicle terminal, etc.

[0040] It should be noted that the application scenarios described in the following embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0041] The following provides a detailed explanation of the liquid chiller selection method for the energy storage system provided in this application.

[0042] like Figure 1 As shown, the method includes the following steps S110 to S130.

[0043] S110, Determine the first heating power of the battery in the energy storage system in the first stage, the second heating power in the second stage, and the heat absorption power of the battery.

[0044] Specifically, the first and second stages can be two phases of the battery's life cycle, such as the early and late stages, but are not limited to these. This application determines the required cooling capacity of the battery at different stages by identifying the first heating power of the battery in the first stage and the second heating power in the second stage. Based on this, the cooling capacity range of the liquid cooling unit can be designed, allowing for the selection of the appropriate liquid cooling unit. Simultaneously, the battery's heat absorption power refers to the heat absorption power of the battery itself during charging and discharging, which can be determined based on the battery's specific heat capacity.

[0045] In some embodiments, such as Figure 2 As shown, step S110 includes steps S111 and S112.

[0046] S111. Determine the number of cells in the energy storage system, the third heating power of the cells in the first stage, the fourth heating power of the cells in the second stage, and the specific heat capacity of the cells.

[0047] S112. Determine the first heating power based on the number of battery cells and the third heating power, determine the second heating power based on the number of battery cells and the fourth heating power, and determine the heating power based on the number of battery cells and the specific heat capacity.

[0048] Specifically, in the process of determining the first heating power of the battery in the first stage and the second heating power in the second stage of the energy storage system, this application can determine the number of cells in the energy storage system, determine the first heating power based on the third heating power of the cells in the first stage, determine the second heating power based on the number of cells and the fourth heating power of the cells in the second stage, and determine the heating power based on the specific heat capacity of the cells and the number of cells.

[0049] For example, the cabinet dimensions of the energy storage system are D*W*H (6058*2438*2896mm), where H is the height, D is the depth, and W is the width. It consists of 10 battery clusters, each cluster comprises 8 battery packs, and each pack contains 52 cells. The specific heat capacity C of the cell material is 1.055 kJ / kg·℃, the mass of a single cell is m, and it is 5.628 kg. The charge / discharge rate of the energy storage system is 0.5C, the single charge / discharge time t is 2 hours, and the cell operating temperature rise ΔT during the charge / discharge process is 8℃. Based on the heat generation assessment at the early stage of the cell's lifespan, a single... The average heat generation power q of the battery cell is 14.67W. Therefore, the first heat generation power of the battery cell as a whole is Qb1 = total number of cells * q = 10 * 8 * 52 * 14.67 = 61027.2W. The heat absorbed by the battery cell material itself is Qa = C * 10 * 8 * 52 * m * ΔT * 1000 / t = 27444.63W. Based on the heat generation assessment at the end of the battery cell's lifespan, the heat generation has increased compared to the early stage of the lifespan. The heat generation of a single battery cell is approximately 18.93W. With other conditions remaining unchanged, the second heat generation power of the battery cell as a whole can be obtained as Qb2 = total number of cells * q = 78748.8W.

[0050] S120. Determine the target cooling power of the liquid chiller unit based on the first heating power and the second heating power, and determine the target heating power of the liquid chiller unit based on the heat absorption power.

[0051] In this embodiment, the target cooling power can be understood as the power range of the liquid cooling unit for liquid cooling the energy storage system. For example, if the first heating power is the heating power at the beginning of the battery's lifespan, and the second heating power is the heating power at the end of the battery's lifespan, then the power range of the liquid cooling unit for liquid cooling the energy storage system can be between the first and second heating powers. Simultaneously, considering that the battery's heating power may be too high in the early stages of its lifespan due to uncertainties, a certain margin needs to be reserved for the early stages. That is, a fifth heating power is determined based on the first heating power and a preset coefficient, and it is determined whether the fifth heating power is greater than the second heating power. If it is not greater than the second heating power, then the target cooling power is determined to be between the first and second heating powers; if it is greater than the second heating power, then the target cooling power is determined to be between the first and fifth heating powers. The preset coefficient can be 1.2, but is not limited to this.

[0052] In some embodiments, such as Figure 3 As shown, step S120 includes steps S121 and S122.

[0053] S121. Determine the first cooling power of the liquid chiller unit based on the solar radiation power and the first heating power received by the energy storage system, and determine the second cooling power of the liquid chiller unit based on the solar radiation power and the second heating power.

[0054] S122. Determine the target cooling power of the liquid chiller unit based on the first cooling power and the second cooling power.

[0055] Specifically, this application considers not only the heat generation power of the battery but also the heat generated by solar radiation on the energy storage system's cabinet, in order to further refine the cooling capacity range of the liquid-cooled unit for cooling the energy storage system. Therefore, this application can determine the first cooling power of the liquid-cooled unit based on the solar radiation power and the first heat generation power received by the energy storage system, and determine the second cooling power based on the solar radiation power and the second heat generation power. Then, based on the first and second cooling powers, the target cooling power of the liquid-cooled unit is determined. The solar radiation power can be determined based on the actual environment in which the energy storage system is located.

[0056] In some embodiments, such as Figure 4 As shown, the selection method for liquid-cooled units in energy storage systems also includes steps S210 and S220.

[0057] S210. Determine the solar radiation intensity, the solar radiation area of ​​the energy storage system, and the heat absorption rate of the energy storage system.

[0058] S220. Determine the solar radiation power based on radiation intensity, radiation area, and heat absorption rate.

[0059] Specifically, in determining the solar radiation power, this application can base it on the solar radiation intensity of the environment where the energy storage system is located, the solar radiation area of ​​the energy storage system, and the heat absorption rate of the energy storage system. The solar radiation intensity can be obtained from a survey of the customer's application site environment; for example, the solar radiation intensity E can be taken as 1120 W / m². 2 The solar radiation area of ​​an energy storage system can be determined based on the area of ​​the energy storage system's cabinet that is exposed to sunlight.

[0060] In addition, if the cabinet is designed with steel plates painted in gray-white, the heat absorption rate of the cabinet is A = 0.3.

[0061] In some embodiments, such as Figure 5 As shown, the selection method for liquid-cooled units in energy storage systems also includes steps S310 and S320.

[0062] S310. Determine the heat transfer coefficient of the energy storage system;

[0063] S320. Determine the solar radiation power based on the heat transfer coefficient, radiation intensity, radiation area, and heat absorption rate.

[0064] Specifically, this application also considers the heat transfer coefficient of the energy storage system in the process of determining the solar radiation power to accurately determine the solar radiation power. The formula for calculating the solar radiation power Qr is Qr=0.047*k*S2*E*A=904.97W, where k is the heat transfer coefficient, S2 is the solar radiation area, E is the solar radiation intensity, and A is the heat absorption rate.

[0065] The heat transfer coefficient of the energy storage system can be determined based on the wall design of the system's cabinet. If the cabinet adopts a double-wall design, its heat transfer coefficient k can be taken as 2.5 kW / m². 2 ·℃.

[0066] In some embodiments, such as Figure 6 As shown, the selection method for liquid-cooled units in energy storage systems also includes steps S410 and S420.

[0067] S410. Determine the solar radiation pattern on the energy storage system;

[0068] S420. Determine the radiation area based on the irradiation method.

[0069] In this embodiment, the illumination mode of the energy storage system can be determined by the solar radiation received by the structure of the energy storage system. For example, a hexagonal cabinet typically receives sunlight on two sides simultaneously (in the case of frontal illumination, oblique illumination can be three sides, which can be converted to frontal illumination as two sides). In this case, the solar radiation area S2 = H × D + H × W = 22.92 m² 2 H is the height of the cabinet, D is the depth of the cabinet, and W is the width of the cabinet.

[0070] In some embodiments, such as Figure 7 As shown, step S120 includes steps S1201 and S1202.

[0071] S1201. Determine the third cooling power of the liquid chiller unit based on the heat absorption power and the first heat generation power, and determine the fourth cooling power of the liquid chiller unit based on the heat absorption power and the second heat generation power.

[0072] S1202. Determine the target cooling power of the liquid chiller unit based on the third and fourth cooling power.

[0073] Specifically, when determining the target cooling power of the liquid cooling unit, this application can determine the cooling power of the liquid cooling unit for the first-stage battery and the second-stage battery, which can be a third cooling power and a fourth cooling power, respectively. The third cooling power can be determined based on the heat absorption power and the first heat generation power, while the fourth cooling power can be determined based on the heat absorption power and the second heat generation power.

[0074] In some embodiments, such as Figure 8 As shown, step S120 includes steps S120a and S120b.

[0075] S120a. Based on the heat infiltration power and the first heat generation power of the energy storage system, determine the fifth cooling power of the liquid chiller unit, and based on the heat infiltration power and the second heat generation power, determine the sixth cooling power of the liquid chiller unit.

[0076] S120b. Determine the target cooling power of the liquid chiller unit based on the fifth and sixth cooling power.

[0077] Specifically, when determining the target cooling power of the liquid-cooled unit, this application also needs to consider the heat infiltration power of the energy storage system. Therefore, the fifth cooling power of the liquid-cooled unit can be determined based on the heat infiltration power of the energy storage system and the first heating power, and the sixth cooling power can be determined based on the heat infiltration power and the second heating power. Finally, the target cooling power of the liquid-cooled unit can be determined based on the fifth and sixth cooling powers. In this embodiment, the heat infiltration power can be understood as the external heat penetrating into the cabinet of the energy storage system due to the higher external temperature and lower internal temperature.

[0078] In some embodiments, step S120 includes the step of determining the target heating power of the liquid chiller unit based on the heat infiltration power and heat absorption power of the energy storage system.

[0079] In this embodiment, when determining the target heating power of the liquid-cooled unit, the application also needs to consider the temperature difference between the inside and outside of the energy storage system cabinet. Because the external temperature of the energy storage system cabinet is lower and the internal temperature is higher, internal heat seeps into the outside of the cabinet. Therefore, this application can determine the target heating power of the liquid-cooled unit based on the heat absorption power of the energy storage system, combined with the heat seepage power of the energy storage system.

[0080] In some embodiments, the method for selecting liquid-cooled units for energy storage systems further includes the step of: determining the heat infiltration power of the energy storage system based on the surface area of ​​the energy storage system that exchanges heat with the outside, the heat transfer coefficient of the energy storage system, and the temperature difference between the inside of the energy storage system and the outside.

[0081] Specifically, in determining the heat infiltration power of the energy storage system, this application can determine the heat infiltration power of the energy storage system based on the surface area of ​​the energy storage system exchanging heat with the outside, the heat transfer coefficient of the energy storage system, and the temperature difference between the inside of the energy storage system and the outside. The surface area of ​​the energy storage system exchanging heat with the outside can be determined based on the surface area of ​​the cabinet. The formula for calculating the heat exchange surface area S1 is S1=H*W*2+D*W+D*H*2, and the formula for calculating the heat infiltration power Qs is: Qs=k*S1*ΔT 1, where k is the heat transfer coefficient, S1 is the surface area, ΔT 1 is the internal and external temperature difference, H is the height, D is the depth, and W is the width.

[0082] For example, considering an extreme high-temperature environment, with an external ambient temperature of 55°C and an internal ambient temperature of 25°C, the temperature difference between the inside and outside of the cabinet is 30°C, and the heat absorbed by the cabinet can be 4546.04W; considering an extreme low-temperature environment, with an external ambient temperature of -30°C and an internal ambient temperature of 5°C, the temperature difference between the inside and outside of the cabinet is 35°C, and the heat absorbed by the cabinet can be 5303.7W.

[0083] S130. Select the liquid chiller unit based on the target cooling capacity and target heating capacity.

[0084] Specifically, this application determines the target cooling power based on the battery's first heating power, second heating power, the heat infiltration power of the energy storage system, the battery's heat absorption power, and the solar radiation power received by the energy storage system. The formula for the target cooling power Qt is: Qt = Qb + Qs + Qr - Qa, where Qb is the overall heating power of the cell, Qs is the heat infiltration power, Qr is the solar radiation power received by the energy storage system, and Qa is the battery's heat absorption power. Considering the first and second stages of the cell, the cooling power Qt1 of the first stage and the cooling power Qt2 of the second stage can be obtained, where Qt lies between Qt1 and Qt2.

[0085] Furthermore, when determining the target heating power, this application can determine the target heating power of the liquid-cooled unit based on the heat infiltration power and heat absorption power of the energy storage system. The formula for the target heating power Q3 can be Q3 = Qa – Qs, where Qa is the heat absorption power of the battery and Qs is the heat infiltration power.

[0086] In the liquid cooling unit selection method for energy storage systems provided in this application embodiment, the first heating power of the battery in the first stage, the second heating power in the second stage, and the heat absorption power of the battery are determined. Based on the first and second heating powers, the target cooling power of the liquid cooling unit is determined, and based on the heat absorption power, the target heating power of the liquid cooling unit is determined. The liquid cooling unit is then selected based on the target cooling and heating powers. This application combines the heating power of the battery at different stages to design the cooling capacity of the liquid cooling unit, thereby achieving the selection of the liquid cooling unit. This ensures that the battery's full life cycle operation requirements are met, thus slowing down battery life degradation and extending battery lifespan. It also avoids excessive design requirements for the cooling and heating capacity of the liquid cooling unit, thereby saving electricity costs while ensuring stable operation of the battery at full power throughout its entire life cycle.

[0087] This application also provides a liquid chiller unit selection device 500 for an energy storage system, which is used to perform any embodiment of the aforementioned liquid chiller unit selection method for an energy storage system.

[0088] Specifically, please refer to Figure 9 , Figure 9 This is a schematic block diagram of the liquid cooler unit selection device 500 for the energy storage system provided in the embodiments of this application.

[0089] like Figure 9 As shown, the liquid cooler unit selection device 500 for the energy storage system includes: a first determining unit 510, a second determining unit 520, and a selection unit 530.

[0090] The first determining unit 510 is used to determine the first heating power of the battery in the energy storage system in the first stage, the second heating power in the second stage, and the heat absorption power of the battery.

[0091] The second determining unit 520 is used to determine the target cooling power of the liquid chiller based on the first heating power and the second heating power, and to determine the target heating power of the liquid chiller based on the heat absorption power.

[0092] Selection unit 530 is used to select liquid chiller units based on target cooling capacity and target heating capacity.

[0093] The liquid cooler unit selection device 500 for the energy storage system provided in this application embodiment is used to perform the above-mentioned determination of the first heating power of the battery in the energy storage system in the first stage, the second heating power in the second stage, and the heat absorption power of the battery; to determine the target cooling power of the liquid cooler unit based on the first heating power and the second heating power, and to determine the target heating power of the liquid cooler unit based on the heat absorption power; and to select the liquid cooler unit based on the target cooling power and the target heating power.

[0094] It should be noted that those skilled in the art can clearly understand that the specific implementation process of the liquid cooler unit selection device 500 and each unit of the above-mentioned energy storage system can be referred to the corresponding description in the aforementioned method embodiments. For the sake of convenience and brevity, it will not be repeated here.

[0095] The liquid-cooled chiller selection device 500 for the aforementioned energy storage system can be implemented as a computer program, which can, for example... Figure 10 It runs on the electronic device shown.

[0096] Please see Figure 10 , Figure 10 This is a schematic block diagram of an electronic device provided in an embodiment of this application. The electronic device 600 can be a terminal, including cloud-based devices, in-vehicle terminal devices, smartphones, tablets, laptops, desktop computers, personal digital assistants, and wearable devices.

[0097] See Figure 10 The electronic device 600 includes a processor 602, a memory, and a network interface 605 connected via a system bus 601. The memory may include a non-volatile storage medium 603 and internal memory 604.

[0098] The non-volatile storage medium 603 may store an operating system 6031 and a computer program 6032. The computer program 6032 includes program instructions that, when executed, cause the processor 602 to perform a liquid-cooled unit selection method for an energy storage system.

[0099] The processor 602 provides computing and control capabilities to support the operation of the entire electronic device 600.

[0100] The internal memory 604 provides an environment for the operation of the computer program 6032 in the non-volatile storage medium 603. When the computer program 6032 is executed by the processor 602, the processor 602 can execute a liquid-cooled unit selection method for an energy storage system.

[0101] This network interface 605 is used for network communication with other devices. Those skilled in the art will understand that... Figure 10 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the electronic device 600 to which the present application is applied. The specific electronic device 600 may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0102] The processor 602 is used to run the computer program 6032 stored in the memory to perform the following steps: determining the first heating power of the battery in the energy storage system in the first stage, the second heating power in the second stage, and the heat absorption power of the battery; determining the target cooling power of the liquid chiller unit based on the first heating power and the second heating power, and determining the target heating power of the liquid chiller unit based on the heat absorption power; and selecting the liquid chiller unit based on the target cooling power and the target heating power.

[0103] It should be understood that in the embodiments of this application, the processor 602 may be a central processing unit (CPU), or it may 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, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0104] According to one aspect of this application, a computer program product or computer program is also provided, comprising computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the following steps: determining a first heating power of the battery in an energy storage system in a first stage, a second heating power in a second stage, and the heat absorption power of the battery; determining a target cooling power of a liquid-cooled unit based on the first and second heating powers, and determining a target heating power of the liquid-cooled unit based on the heat absorption power; and selecting a liquid-cooled unit based on the target cooling power and the target heating power.

[0105] It will be understood by those skilled in the art that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program includes program instructions and can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the embodiments of the above methods.

[0106] Therefore, this application also provides a storage medium. This storage medium can be a computer-readable storage medium. The storage medium stores a computer program, wherein the computer program includes program instructions. When executed by a processor, the program instructions cause the processor to perform the following steps: determining the first heating power of the battery in the energy storage system in a first stage, the second heating power in a second stage, and the heat absorption power of the battery; determining the target cooling power of the liquid cooler unit based on the first heating power and the second heating power, and determining the target heating power of the liquid cooler unit based on the heat absorption power; and selecting a liquid cooler unit based on the target cooling power and the target heating power.

[0107] The storage medium can be any computer-readable storage medium that can store program code, such as a USB flash drive, external hard drive, read-only memory (ROM), magnetic disk, or optical disk.

[0108] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0109] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of each unit is merely a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0110] The steps in the methods of this application embodiment can be adjusted, merged, or deleted according to actual needs. The units in the apparatus of this application embodiment can be merged, divided, or deleted according to actual needs. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0111] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause an electronic device (which may be a personal computer, a terminal, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0112] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for selecting liquid-cooled chiller units for an energy storage system, characterized in that, include: The first heating power of the battery in the energy storage system in the first stage, the second heating power in the second stage, and the heat absorption power of the battery are determined respectively. The target cooling power of the liquid cooling unit is determined based on the first heating power and the second heating power, and the target heating power of the liquid cooling unit is determined based on the heat absorption power; the first heating power is the heating power at the beginning of the battery life, and the second heating power is the heating power at the end of the battery life. The liquid chiller unit is selected based on the target cooling capacity and the target heating capacity. The fifth heating power is determined based on the first heating power and a preset coefficient, and it is determined whether the fifth heating power is greater than the second heating power. If it is not greater than the second heating power, the target cooling power is determined to be between the first heating power and the second heating power; if it is greater than the second heating power, the target cooling power is determined to be between the first heating power and the fifth heating power. The step of determining the target cooling power of the liquid chiller unit based on the first heating power and the second heating power includes: The first cooling power of the liquid chiller is determined based on the solar radiation power received by the energy storage system and the first heating power, and the second cooling power of the liquid chiller is determined based on the solar radiation power and the second heating power. The target cooling power of the liquid chiller unit is determined based on the first cooling power and the second cooling power. Alternatively, the third cooling power of the liquid chiller can be determined based on the heat absorption power and the first heat generation power, and the fourth cooling power of the liquid chiller can be determined based on the heat absorption power and the second heat generation power. The target cooling power of the liquid-cooled unit is determined based on the third cooling power and the fourth cooling power. Alternatively, the fifth cooling power of the liquid chiller unit can be determined based on the heat infiltration power of the energy storage system and the first heat generation power, and the sixth cooling power of the liquid chiller unit can be determined based on the heat infiltration power and the second heat generation power. The target cooling power of the liquid chiller unit is determined based on the fifth cooling power and the sixth cooling power. The formula for the target cooling power Qt is: Qt=Qb+Qs+Qr-Qa, where Qb is the overall heating power of the cell, which includes the first heating power and / or the second heating power, Qs is the heat infiltration power, Qr is the solar radiation power received by the energy storage system, and Qa is the heat absorption power of the battery.

2. The method for selecting liquid-cooled chiller units for energy storage systems according to claim 1, characterized in that, The method further includes: Determine the solar radiation intensity, the solar radiation area of ​​the energy storage system, and the heat absorption rate of the energy storage system; The solar radiation power is determined based on the radiation intensity, the radiation area, and the heat absorption rate.

3. The method for selecting liquid-cooled units for energy storage systems according to claim 2, characterized in that, The method further includes: Determine the heat transfer coefficient of the energy storage system; The solar radiation power is determined based on the heat transfer coefficient, the radiation intensity, the radiation area, and the heat absorption rate.

4. The method for selecting liquid-cooled chiller units for energy storage systems according to claim 2, characterized in that, The method further includes: Determine the solar radiation pattern on the energy storage system; The radiation area is determined according to the irradiation method.

5. The method for selecting liquid-cooled units for energy storage systems according to any one of claims 1-4, characterized in that, Determining the target heating power of the liquid chiller unit based on the heat absorption power includes: The target heating power of the liquid chiller is determined based on the heat infiltration power and the heat absorption power of the energy storage system.

6. The method for selecting liquid-cooled chiller units for energy storage systems according to claim 1 or 5, characterized in that, The method includes: The heat infiltration power of the energy storage system is determined based on the surface area of ​​the energy storage system that exchanges heat with the outside world, the heat transfer coefficient of the energy storage system, and the temperature difference between the inside of the energy storage system and the outside world.

7. The method for selecting a liquid-cooled chiller unit for an energy storage system according to any one of claims 1-4, characterized in that, Determining the first heating power of the battery in the energy storage system in the first stage, the second heating power in the second stage, and the heat absorption power of the battery includes: The number of cells in the energy storage system, the third heating power of the cells in the first stage, the fourth heating power of the cells in the second stage, and the specific heat capacity of the cells are determined. The first heating power is determined based on the number of battery cells and the third heating power; the second heating power is determined based on the number of battery cells and the fourth heating power; and the heating power is determined based on the number of battery cells and the specific heat capacity.

8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the liquid-cooled unit selection method for the energy storage system according to any one of claims 1 to 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the liquid-cooled unit selection method for the energy storage system as described in any one of claims 1 to 7.

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