Thermal management simulation method and device for energy storage system

Abstract

The embodiments of this specification provide a thermal management simulation method and device for an energy storage system, wherein the thermal management simulation method for an energy storage system includes: establishing a simulation model of the energy storage system, performing fluid simulation on multiple cold plates included in the energy storage system, and recording the relationship between the fluid pressure drop and flow rate corresponding to each cold plate according to the simulation results; simplifying the fluid domain of each cold plate, and keeping the relationship between the fluid pressure drop and flow rate corresponding to each cold plate consistent before and after simplification; performing fluid simulation on multiple battery packs respectively in combination with the simplified results, and screening the target battery pack according to the simulation results, performing thermal simulation on the target battery pack, and determining the operating temperature of the energy storage system according to the simulation results. By simulating the fluid and heat of the energy storage system separately, and simplifying the cold plate into a regular circular tube while ensuring that the fluid pressure drop and flow rate of the cold plate remain basically unchanged, it is beneficial to reduce the number of grids, thereby reducing the time required for the simulation process and improving the simulation efficiency.

Description

Technical Field

[0001] The embodiments of this specification relate to the field of energy storage technology, and in particular to a thermal management simulation method for an energy storage system. Background Art

[0002] With the vigorous development of the new energy industry and the optimized application of wind and solar power generation systems, more and more box-type energy storage systems are put into use. However, due to the increasingly high energy density requirements of the system and the fact that the project is basically located outdoors, the heat dissipation problem has become one of the factors restricting the technological progress of the system.

[0003] Batteries generate a lot of heat during the charging and discharging process. If this heat is not properly controlled, it will affect the cycle life of the power battery pack, or even cause a vehicle fire due to thermal runaway. Therefore, effective thermal management of power batteries is of great significance to solving the safety problem of power batteries. Thermal analysis of box-type energy storage systems can obtain characteristic parameters such as the temperature field distribution of battery packs, energy storage equipment, and box environment under certain working conditions, provide a design basis for temperature and airflow adjustment facilities such as fans, air conditioners, and air ducts, provide guidance and theoretical basis for the setting and improvement of the system, and is also a scientific and economical technical method. Therefore, an effective method is urgently needed to solve such problems. Summary of the invention

[0004] In view of this, an embodiment of this specification provides a thermal management simulation method for an energy storage system. One or more embodiments of this specification also involve a thermal management simulation device for an energy storage system, a computing device, a computer-readable storage medium, and a computer program to solve the technical defects existing in the prior art.

[0005] According to a first aspect of an embodiment of this specification, a thermal management simulation method for an energy storage system is provided, comprising:

[0006] Establishing a simulation model of an energy storage system, wherein the energy storage system includes a plurality of cold plates and a plurality of battery packs, and the plurality of cold plates correspond to the plurality of battery packs one by one;

[0007] Performing fluid simulation on the multiple cold plates, and recording the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate according to the simulation results;

[0008] Simplifying the fluid domain of each cold plate, wherein the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate remains consistent before and after simplification;

[0009] In combination with the simplified results, fluid simulation is performed on the multiple battery packs respectively, and the inlet flow rate of each battery pack is recorded according to the simulation results;

[0010] A target battery pack is screened according to the inlet flow, a thermal simulation is performed on the target battery pack, and an operating temperature of the energy storage system is determined according to the simulation result.

[0011] Optionally, screening a target battery pack according to the inlet flow rate and performing thermal simulation on the target battery pack includes:

[0012] Determine a maximum value and a minimum value of the inlet flow, and determine a first battery pack corresponding to the maximum value and a second battery pack corresponding to the minimum value as target battery packs;

[0013] Thermal simulation is performed on the first battery pack and the second battery pack respectively.

[0014] Optionally, determining the operating temperature of the energy storage system according to the simulation result includes:

[0015] Determine a first maximum temperature value corresponding to the first battery pack according to a thermal simulation result of the first battery pack;

[0016] Determining a second maximum temperature value corresponding to the second battery pack according to the thermal simulation result of the second battery pack;

[0017] An operating temperature of the energy storage system is determined according to the first maximum temperature value and the second maximum temperature value.

[0018] Optionally, determining the operating temperature of the energy storage system according to the first maximum temperature value and the second maximum temperature value includes:

[0019] comparing the first maximum temperature value and the second maximum temperature value;

[0020] When the first maximum temperature value is greater than the second maximum temperature value, the first maximum temperature value is determined as the maximum operating temperature value of the energy storage system, and the difference between the first maximum temperature value and the second maximum temperature value is determined as the maximum operating temperature difference value of the energy storage system;

[0021] When the first maximum temperature value is less than the second maximum temperature value, the second maximum temperature value is determined as the maximum operating temperature value of the energy storage system, and the difference between the second maximum temperature value and the first maximum temperature value is determined as the maximum operating temperature difference of the energy storage system.

[0022] Optionally, the cold plate contains a coolant, and before simplification, the multiple cold plates are serpentine cold plates, and after simplification, the multiple cold plates are regular circular tubular cold plates.

[0023] Optionally, the simplifying the fluid domain of each cold plate includes:

[0024] When it is determined that the shapes of the plurality of cold plates after simplification are regular circular tubes, the radius of each regular circular tube-shaped cold plate after simplification is determined according to the relationship between the fluid pressure drop and the flow velocity corresponding to each cold plate;

[0025] According to the radius of each regular circular tubular cold plate, each cold plate is simplified into a regular circular tubular cold plate of corresponding radius.

[0026] Optionally, establishing a simulation model of the energy storage system includes:

[0027] Establishing a physical model of the energy storage system based on the multiple cold plates and the multiple battery packs;

[0028] Meshing the plurality of cold plates and the plurality of battery packs based on the physical model;

[0029] A simulation model of the energy storage system is established based on the grid division results.

[0030] According to a second aspect of an embodiment of this specification, a thermal management simulation device for an energy storage system is provided, comprising:

[0031] An establishing module configured to establish a simulation model of an energy storage system, wherein the energy storage system includes a plurality of cold plates and a plurality of battery packs, and the plurality of cold plates correspond to the plurality of battery packs one by one;

[0032] A first simulation module is configured to perform fluid simulation on the plurality of cold plates, and record the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate according to the simulation result;

[0033] A processing module is configured to simplify the fluid domain of each cold plate, wherein the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate remains consistent before and after simplification;

[0034] A second simulation module is configured to perform fluid simulation on the plurality of battery packs respectively in combination with the simplified results, and record an inlet flow rate of each battery pack according to the simulation results;

[0035] A determination module is configured to screen a target battery pack according to the inlet flow, perform thermal simulation on the target battery pack, and determine the operating temperature of the energy storage system according to the simulation result.

[0036] According to a third aspect of an embodiment of this specification, a computing device is provided, including:

[0037] Memory and processor;

[0038] The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions to implement any step of the thermal management simulation method for the energy storage system.

[0039] According to a fourth aspect of the embodiments of this specification, a computer-readable storage medium is provided, which stores computer-executable instructions, and when the instructions are executed by a processor, the steps of any one of the thermal management simulation methods for the energy storage system are implemented.

[0040] According to a fifth aspect of the embodiments of this specification, a computer program is provided, wherein when the computer program is executed in a computer, the computer is caused to execute the steps of the thermal management simulation method of the energy storage system.

[0041] The embodiment of this specification establishes a simulation model of an energy storage system, wherein the energy storage system includes multiple cold plates and multiple battery packs, and the multiple cold plates correspond to the multiple battery packs one by one; fluid simulation is performed on the multiple cold plates, and the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate is recorded according to the simulation results; the fluid domain of each cold plate is simplified, wherein the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate remains consistent before and after simplification; combined with the simplified results, fluid simulation is performed on multiple battery packs respectively, and the inlet flow of each battery pack is recorded according to the simulation results; the target battery pack is screened according to the inlet flow, the target battery pack is thermally simulated, and the operating temperature of the energy storage system is determined according to the simulation results. The embodiment of this specification simulates the fluid and heat of the energy storage system separately. First, the fluid domain simulation is performed on the cold plate corresponding to each battery pack. On the premise of ensuring that the fluid pressure drop and flow rate of each cold plate are basically unchanged, the cold plate in the three-level pipeline of the system is simplified into a regular circular tube, which is conducive to reducing the number of grids, thereby helping to reduce the time required for the simulation process and improve the simulation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a flow chart of a thermal management simulation method for an energy storage system provided by an embodiment of this specification;

[0043] Figure 2 is a schematic diagram of a simplified front and rear cold plate fluid domain provided by an embodiment of this specification;

[0044] Figure 3 It is a structural schematic diagram of a thermal management simulation device for an energy storage system provided by an embodiment of this specification;

[0045] Figure 4 It is a structural block diagram of a computing device provided by an embodiment of this specification. DETAILED DESCRIPTION

[0046] Many specific details are described in the following description to facilitate a full understanding of this specification. However, this specification can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of this specification, so this specification is not limited to the specific implementation disclosed below.

[0047] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a", "said" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0048] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0049] Due to the complex structure of the container energy storage system, traditional thermal management simulation simultaneously simulates the fluid and heat of the energy storage system. In addition, due to the large size of the triode pipeline cold plate, the number of grids obtained when dividing the grid is large, resulting in the simulation process consuming a large amount of computing resources and time.

[0050] In this specification, a thermal management simulation method for an energy storage system is provided. This specification also involves a thermal management simulation device for an energy storage system, a computing device, a computer-readable storage medium, and a computer program, which are described in detail one by one in the following embodiments.

[0051] Figure 1 A flow chart of a thermal management simulation method for an energy storage system provided according to an embodiment of the present specification is shown, which specifically includes the following steps.

[0052] Step 102: Establishing a simulation model of an energy storage system, wherein the energy storage system includes a plurality of cold plates and a plurality of battery packs, and the plurality of cold plates correspond to the plurality of battery packs one by one.

[0053] Specifically, the cold plate described in the embodiment of this specification is a liquid cold plate, and the schematic diagram of the initial fluid domain of a single liquid cold plate is as follows: Figure 2 As shown, this shape of cold plate can also be called a serpentine cold plate.

[0054] An energy storage system usually includes multiple cold plates and multiple battery packs. Each battery pack corresponds to a cold plate to cool the battery pack. Therefore, when the operating temperature of the energy storage system needs to be determined, the temperature of each battery pack can be determined by performing thermal simulation on each battery pack, and then the operating temperature of the energy storage system can be determined based on the temperature of each battery pack.

[0055] In actual applications, energy storage systems are usually deployed in containers. To improve space utilization in containers, multiple battery packs in energy storage systems are usually stacked and stored. This method results in a higher density of battery packs, which will continuously emit heat during use. Although each battery pack is equipped with a cold plate to cool it, if any cold plate has a problem, causing the local temperature of the energy storage system to be too high, there will be safety hazards. Therefore, thermal management of the energy storage system is very necessary.

[0056] In the embodiments of this specification, before performing thermal simulation on each battery pack, a simulation model of the energy storage system may be established first, so that subsequent simulation processing can be performed based on the simulation model.

[0057] In an optional implementation, establishing a simulation model of the energy storage system includes:

[0058] Establishing a physical model of the energy storage system based on the multiple cold plates and the multiple battery packs;

[0059] Meshing the plurality of cold plates and the plurality of battery packs based on the physical model;

[0060] A simulation model of the energy storage system is established based on the grid division results.

[0061] Specifically, before fluid simulation, the cold plate and battery pack are meshed to discretize the continuous physical process and convert it into a computable form. Specifically, equations can be established at the nodes to divide the solution domain into a finite number of discrete units. By subdividing the physical space, it is possible to capture subtle changes in fluid flow, thereby improving computational efficiency and accuracy of results.

[0062] The embodiments of this specification may first establish a physical model based on multiple cold plates and multiple battery packs of the energy storage system, and then subdivide the physical space of the physical model, that is, mesh the cold plates and the battery packs.

[0063] The meshing process is based on the complexity of the geometry. Different geometries have different meshing methods. In addition, the denser the meshing, the higher the calculation accuracy. However, in practical applications, time cost and calculation cost must also be considered. Therefore, when meshing, a mesh that meets the calculation accuracy can be used without any restrictions.

[0064] In practical applications, meshing methods include but are not limited to automatic meshing methods and tetrahedral meshing methods, and mesh types include tetrahedral meshes, hexahedral meshes, prism layer meshes, and pyramid meshes.

[0065] Among them, when using the automatic meshing method for meshing, the program automatically performs entity detection based on the complexity of the geometric figures, and uses the sweeping method to divide the hexahedral mesh for the entities that can be swept, and uses the coordinated patching algorithm to divide the tetrahedral mesh for the entities that cannot be swept. When using the tetrahedral meshing method for meshing, it mainly uses the coordinated patching algorithm and the independent patching algorithm for meshing to generate tetrahedral units.

[0066] In the process of meshing, the specific meshing method and mesh type can be determined according to actual needs and are not limited here.

[0067] After the meshing is completed, a simulation model can be established based on the meshing results.

[0068] Step 104: Perform fluid simulation on the multiple cold plates, and record the relationship between the fluid pressure drop and flow rate corresponding to each cold plate according to the simulation results.

[0069] Specifically, since the grids are divided, fluid simulation is performed on each cold plate, specifically, fluid simulation is performed on each grid of the cold plate, and then the fluid simulation result of the corresponding cold plate is determined based on the simulation result of each grid, and the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate is recorded according to the simulation result.

[0070] In practical applications, the relationship between pressure drop and flow rate involved in fluid simulation can be studied and simulated through porous media models and fluid dynamics simulation software such as Fluent.

[0071] Among them, the porous media model is suitable for simulating the flow through the medium, such as filter paper, perforated disk, flow distributor, and pipe stack. By defining the momentum equation of the porous medium (Formula 1), the pressure loss of the flow can be calculated to study the relationship between pressure drop and flow rate.

[0072] (Formula 1)

[0073] in, It represents the change of fluid momentum with time, also known as the inertial force term; represents the body force term; represents the pressure differential force term; represents the viscous force term, represents the density of the fluid; Indicates the viscosity of the fluid.

[0074] In porous media, pressure drop is mainly composed of surface friction resistance and body resistance. Surface friction resistance is the viscous stress generated on the packing surface and gas-liquid interface when the gas flows in the gap, while body resistance is the kinetic energy loss caused by the sudden increase or decrease of the gas flow channel, change of direction, etc. These resistance factors affect the flow of the fluid, resulting in pressure drop. The calculation of pressure drop involves the physical properties of the fluid (such as density, viscosity) and operating conditions (such as gas-liquid flow, temperature, etc.), which together determine the size of the pressure drop. In practical applications, since it is difficult to perform accurate theoretical calculations, empirical correlations or correlation diagrams are usually used for estimation.

[0075] In addition, through fluid dynamics simulation software such as Fluent, you can deeply explore the pressure loss, velocity distribution and pressure distribution in fluid simulation. For example, when performing fluid simulation through Fluent, you can simulate the flow of fluid under different conditions by setting different flow conditions, such as inlet velocity and outlet velocity. By analyzing the simulation results, it can be observed that the trend of velocity distribution is consistent with that of dynamic pressure distribution, that is, the dynamic pressure is also larger in areas with high velocity, while the static pressure distribution shows the opposite trend to the velocity distribution, that is, the velocity is smaller in areas with high static pressure.

[0076] After the simulation is completed, a characteristic curve diagram of fluid velocity and pressure drop can be generated to record the relationship between fluid pressure drop and flow velocity corresponding to each cold plate.

[0077] Step 106: simplifying the fluid domain of each cold plate, wherein the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate remains consistent before and after simplification.

[0078] In an optional embodiment, the cold plate contains a coolant, and before simplification, the multiple cold plates are serpentine cold plates, and after simplification, the multiple cold plates are regular circular tubular cold plates.

[0079] The schematic diagram of the simplified front and rear cold plate fluid domains provided in the embodiments of this specification is as follows Figure 2 As shown, the simplification is a serpentine cold plate before simplification and a regular circular tubular cold plate after simplification.

[0080] Furthermore, the simplification of the fluid domain of each cold plate includes:

[0081] When it is determined that the shapes of the plurality of cold plates after simplification are regular circular tubes, the radius of each regular circular tube-shaped cold plate after simplification is determined according to the relationship between the fluid pressure drop and the flow velocity corresponding to each cold plate;

[0082] According to the radius of each regular circular tubular cold plate, each cold plate is simplified into a regular circular tubular cold plate of corresponding radius.

[0083] Specifically, when determining the relationship between the fluid pressure drop and the flow rate V corresponding to the cold plate, after simplifying the cold plate into a regular circular tube, the flow rate of the liquid flowing through its pipe is Q=AV, where A is the cross-sectional area of ​​the regular circular tube cold plate, and V is the flow rate.

[0084] In addition, under standard conditions (temperature is 20°C, pressure is 101.325kPa), the calculation formula for uniform pipe flow is:

[0085] (Formula 2)

[0086] in, is the flow coefficient and depends on the size and shape of the pipe.

[0087] Fluid pressure drop based on cold plate The relationship between the flow rate V and formula 2 and the formula Q=AV can be used to calculate the radius of the simplified regular circular tubular cold plate, and then each cold plate can be simplified into a regular circular tubular cold plate of the corresponding radius.

[0088] Alternatively, determine the fluid pressure drop corresponding to the cold plate After determining the first relationship between the cold plate and the flow velocity V, the cold plate simulation can be simplified into regular circular tubular cold plates of different radii, and then the fluid simulation is performed on the regular circular tubular cold plates of each radius to determine the corresponding second relationship between the fluid pressure drop and the flow velocity. Then, the radius of the regular circular tubular cold plate corresponding to the second relationship closest to the first relationship is determined as the radius of the simplified regular circular tubular cold plate, and then each cold plate is simplified into a regular circular tubular cold plate of the radius.

[0089] Step 108: Based on the simplified results, fluid simulation is performed on the multiple battery packs respectively, and the inlet flow of each battery pack is recorded according to the simulation results.

[0090] Specifically, since the battery pack contains other components or modules in addition to the cold plate, the pipelines of these components or modules may also contain fluid domains. Therefore, when performing fluid simulation on the battery pack, the fluid domain of the simplified cold plate and the fluid domains of other pipelines in the battery pack can be used together as the fluid domain of the battery pack for fluid simulation.

[0091] Similarly, the fluid simulation process of the battery pack can be studied and simulated using fluid dynamics simulation software such as Fluent.

[0092] After the simulation is completed, the inlet flow of each battery pack can be recorded based on the simulation results.

[0093] Step 110: Filter a target battery pack according to the inlet flow rate, perform thermal simulation on the target battery pack, and determine the operating temperature of the energy storage system according to the simulation result.

[0094] In an optional implementation, screening a target battery pack according to the inlet flow rate and performing thermal simulation on the target battery pack includes:

[0095] Determine a maximum value and a minimum value of the inlet flow, and determine a first battery pack corresponding to the maximum value and a second battery pack corresponding to the minimum value as target battery packs;

[0096] Thermal simulation is performed on the first battery pack and the second battery pack respectively.

[0097] Further, determining the operating temperature of the energy storage system according to the simulation results includes:

[0098] Determine a first maximum temperature value corresponding to the first battery pack according to a thermal simulation result of the first battery pack;

[0099] Determining a second maximum temperature value corresponding to the second battery pack according to the thermal simulation result of the second battery pack;

[0100] An operating temperature of the energy storage system is determined according to the first maximum temperature value and the second maximum temperature value.

[0101] Furthermore, determining the operating temperature of the energy storage system according to the first maximum temperature value and the second maximum temperature value includes:

[0102] comparing the first maximum temperature value and the second maximum temperature value;

[0103] When the first maximum temperature value is greater than the second maximum temperature value, the first maximum temperature value is determined as the maximum operating temperature value of the energy storage system, and the difference between the first maximum temperature value and the second maximum temperature value is determined as the maximum operating temperature difference value of the energy storage system;

[0104] When the first maximum temperature value is less than the second maximum temperature value, the second maximum temperature value is determined as the maximum operating temperature value of the energy storage system, and the difference between the second maximum temperature value and the first maximum temperature value is determined as the maximum operating temperature difference of the energy storage system.

[0105] Specifically, after determining the inlet flow of each battery pack according to the fluid simulation results of each battery pack, the target battery pack can be screened among the battery packs according to the size of the inlet flow. Specifically, the battery pack with the largest inlet flow (first battery pack) and the battery pack with the smallest inlet flow (second battery pack) among the battery packs can be determined as the target battery packs, and thermal simulation can be performed on each target battery pack to determine the operating temperature of the energy storage system according to the simulation results.

[0106] Furthermore, after performing thermal simulation on the first battery pack and the second battery pack respectively and obtaining corresponding simulation results, a first maximum temperature value corresponding to the first battery pack can be determined according to the thermal simulation result of the first battery pack, and a second maximum temperature value corresponding to the second battery pack can be determined according to the thermal simulation result of the second battery pack. Then, the maximum value of the first maximum temperature value and the second maximum temperature value is equivalent to the maximum temperature of the energy storage system, and the difference between the first maximum temperature value and the second maximum temperature value is equivalent to the temperature difference of the energy storage system.

[0107] Typically, the second maximum temperature value corresponding to the second battery pack with a small inlet flow is greater than the first maximum temperature value corresponding to the first battery pack with a large inlet flow. Therefore, the second maximum temperature value can be equivalent to the maximum temperature of the energy storage system, and the difference between the second maximum temperature value and the first maximum temperature value can be equivalent to the temperature difference of the energy storage system.

[0108] In the embodiments of this specification, after determining the maximum temperature and temperature difference of the energy storage system, it can be determined based on the maximum temperature and temperature difference whether the thermal management structure inside the energy storage system needs to be optimized and how to optimize it, so as to avoid related problems caused by high local temperatures or large system temperature differences.

[0109] The embodiments of this specification monitor the inlet flow of each battery pack in combination with the simplified cold plate fluid domain, that is, perform fluid simulation on each battery pack. After the fluid simulation is completed, thermal simulation is performed on the single battery pack corresponding to the maximum and minimum inlet flow rates according to the monitored maximum and minimum inlet flow rates. The maximum temperature and temperature difference obtained by the thermal simulation of the battery pack under the two flow rates can be equivalent to the maximum temperature and maximum temperature difference of the energy storage system, which can ensure the accuracy of the results while helping to reduce the computing resources and computing time required for the thermal management process of the energy storage system.

[0110] The embodiment of this specification establishes a simulation model of an energy storage system, wherein the energy storage system includes multiple cold plates and multiple battery packs, and the multiple cold plates correspond to the multiple battery packs one by one; fluid simulation is performed on the multiple cold plates, and the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate is recorded according to the simulation results; the fluid domain of each cold plate is simplified, wherein the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate remains consistent before and after simplification; combined with the simplified results, fluid simulation is performed on multiple battery packs respectively, and the inlet flow of each battery pack is recorded according to the simulation results; the target battery pack is screened according to the inlet flow, the target battery pack is thermally simulated, and the operating temperature of the energy storage system is determined according to the simulation results. The embodiment of this specification simulates the fluid and heat of the energy storage system separately. First, the fluid domain simulation is performed on the cold plate corresponding to each battery pack. On the premise of ensuring that the fluid pressure drop and flow rate of each cold plate are basically unchanged, the cold plate in the three-level pipeline of the system is simplified into a regular circular tube, which is conducive to reducing the number of grids, thereby helping to reduce the time required for the simulation process and improve the simulation efficiency.

[0111] Corresponding to the above method embodiment, this specification also provides an embodiment of a thermal management simulation device for an energy storage system. Figure 3 FIG. 1 is a schematic diagram showing a structure of a thermal management simulation device for an energy storage system provided by an embodiment of the present specification. Figure 3 As shown, the device comprises:

[0112] An establishing module 302 is configured to establish a simulation model of an energy storage system, wherein the energy storage system includes a plurality of cold plates and a plurality of battery packs, and the plurality of cold plates correspond to the plurality of battery packs one by one;

[0113] A first simulation module 304 is configured to perform fluid simulation on the plurality of cold plates, and record the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate according to the simulation result;

[0114] The processing module 306 is configured to simplify the fluid domain of each cold plate, wherein the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate remains consistent before and after simplification;

[0115] A second simulation module 308 is configured to perform fluid simulation on the plurality of battery packs respectively in combination with the simplified results, and record the inlet flow of each battery pack according to the simulation results;

[0116] The determination module 310 is configured to screen a target battery pack according to the inlet flow, perform thermal simulation on the target battery pack, and determine the operating temperature of the energy storage system according to the simulation result.

[0117] Optionally, the determining module 310 is further configured to:

[0118] Determine a maximum value and a minimum value of the inlet flow, and determine a first battery pack corresponding to the maximum value and a second battery pack corresponding to the minimum value as target battery packs;

[0119] Thermal simulation is performed on the first battery pack and the second battery pack respectively.

[0120] Optionally, the determining module 310 is further configured to:

[0121] Determine a first maximum temperature value corresponding to the first battery pack according to a thermal simulation result of the first battery pack;

[0122] Determining a second maximum temperature value corresponding to the second battery pack according to the thermal simulation result of the second battery pack;

[0123] An operating temperature of the energy storage system is determined according to the first maximum temperature value and the second maximum temperature value.

[0124] Optionally, the determining module 310 is further configured to:

[0125] comparing the first maximum temperature value and the second maximum temperature value;

[0126] When the first maximum temperature value is greater than the second maximum temperature value, the first maximum temperature value is determined as the maximum operating temperature value of the energy storage system, and the difference between the first maximum temperature value and the second maximum temperature value is determined as the maximum operating temperature difference value of the energy storage system;

[0127] When the first maximum temperature value is less than the second maximum temperature value, the second maximum temperature value is determined as the maximum operating temperature value of the energy storage system, and the difference between the second maximum temperature value and the first maximum temperature value is determined as the maximum operating temperature difference of the energy storage system.

[0128] Optionally, the cold plate contains a coolant, and before simplification, the multiple cold plates are serpentine cold plates, and after simplification, the multiple cold plates are regular circular tubular cold plates.

[0129] Optionally, the processing module 306 is further configured to:

[0130] When it is determined that the shapes of the plurality of cold plates after simplification are regular circular tubes, the radius of each regular circular tube-shaped cold plate after simplification is determined according to the relationship between the fluid pressure drop and the flow velocity corresponding to each cold plate;

[0131] According to the radius of each regular circular tubular cold plate, each cold plate is simplified into a regular circular tubular cold plate of corresponding radius.

[0132] Optionally, the establishing module 302 is further configured to:

[0133] Establishing a physical model of the energy storage system based on the multiple cold plates and the multiple battery packs;

[0134] Meshing the plurality of cold plates and the plurality of battery packs based on the physical model;

[0135] A simulation model of the energy storage system is established based on the grid division results.

[0136] The embodiment of this specification simulates the fluid and heat of the energy storage system separately. First, the fluid domain simulation is performed on the cold plate corresponding to each battery pack. Under the premise of ensuring that the fluid pressure drop and flow rate of each cold plate remain basically unchanged, the cold plates in the system are simplified into regular circular tubes, which is conducive to reducing the number of grids, thereby reducing the time required for the simulation process and improving the simulation efficiency.

[0137] The above is a schematic scheme of a thermal management simulation device for an energy storage system of this embodiment. It should be noted that the technical scheme of the thermal management simulation device for the energy storage system and the technical scheme of the thermal management simulation method for the energy storage system described above belong to the same concept, and the details not described in detail in the technical scheme of the thermal management simulation device for the energy storage system can be found in the description of the technical scheme of the thermal management simulation method for the energy storage system described above.

[0138] Figure 4 The block diagram of a computing device 400 according to one embodiment of the present specification is shown. The components of the computing device 400 include but are not limited to a memory 410 and a processor 420. The processor 420 is connected to the memory 410 via a bus 430, and the database 450 is used to store data.

[0139] The computing device 400 also includes an access device 440 that enables the computing device 400 to communicate via one or more networks 460. Examples of these networks include a public switched telephone network (PSTN), a local area network (LAN), a wide area network (WAN), a personal area network (PAN), or a combination of communication networks such as the Internet. The access device 440 may include one or more of any type of network interface (e.g., a network interface card (NIC)) that is wired or wireless, such as an IEEE 802.11 wireless local area network (WLAN) wireless interface, a World Wide Interoperability for Microwave Access (Wi-MAX) interface, an Ethernet interface, a universal serial bus (USB) interface, a cellular network interface, a Bluetooth interface, a near field communication (NFC) interface, and the like.

[0140] In one embodiment of the present specification, the above components of the computing device 400 and Figure 4Other components not shown in the figure may also be connected to each other, for example, via a bus. It should be understood that Figure 4 The computing device structure block diagram shown is only for the purpose of illustration, and is not intended to limit the scope of this specification. Those skilled in the art can add or replace other components as needed.

[0141] Computing device 400 may be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (e.g., a tablet computer, a personal digital assistant, a laptop computer, a notebook computer, a netbook, etc.), a mobile phone (e.g., a smart phone), a wearable computing device (e.g., a smart watch, smart glasses, etc.), or other types of mobile devices, or a stationary computing device such as a desktop computer or PC. Computing device 400 may also be a mobile or stationary server.

[0142] The processor 420 is used to execute the following computer executable instructions, which, when executed by the processor, implement the steps of the thermal management simulation method of the energy storage system.

[0143] The above is a schematic scheme of a computing device of this embodiment. It should be noted that the technical scheme of the computing device and the technical scheme of the thermal management simulation method of the energy storage system described above are of the same concept, and the details not described in detail in the technical scheme of the computing device can be found in the description of the technical scheme of the thermal management simulation method of the energy storage system described above.

[0144] An embodiment of the present specification further provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the thermal management simulation method for the energy storage system.

[0145] The above is a schematic scheme of a computer-readable storage medium of this embodiment. It should be noted that the technical scheme of the storage medium and the technical scheme of the thermal management simulation method of the energy storage system described above are of the same concept, and the details not described in detail in the technical scheme of the storage medium can be found in the description of the technical scheme of the thermal management simulation method of the energy storage system described above.

[0146] An embodiment of the present specification further provides a computer program, wherein when the computer program is executed in a computer, the computer is caused to execute the steps of the thermal management simulation method of the energy storage system.

[0147] The above is a schematic scheme of a computer program of this embodiment. It should be noted that the technical scheme of the computer program and the technical scheme of the thermal management simulation method of the energy storage system mentioned above are of the same concept, and the details not described in detail in the technical scheme of the computer program can be found in the description of the technical scheme of the thermal management simulation method of the energy storage system mentioned above.

[0148] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0149] The computer instructions include computer program codes, which may be in source code form, object code form, executable files or some intermediate forms, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0150] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of this specification are not limited by the order of the actions described, because according to the embodiments of this specification, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the embodiments of this specification.

[0151] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0152] The preferred embodiments of this specification disclosed above are only used to help explain this specification. The optional embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the embodiments of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the embodiments of this specification, so that technicians in the relevant technical field can well understand and use this specification. This specification is only limited by the claims and their full scope and equivalents.

Claims

1. A thermal management simulation method for an energy storage system, comprising: Establishing a simulation model of an energy storage system, wherein the energy storage system includes a plurality of cold plates and a plurality of battery packs, and the plurality of cold plates correspond to the plurality of battery packs one by one; Performing fluid simulation on the multiple cold plates, and recording the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate according to the simulation results; When it is determined that the simplified shapes of the plurality of cold plates are regular circular tubes, the radius of each regular circular tube-shaped cold plate after simplification is determined according to the relationship between the fluid pressure drop and the flow velocity corresponding to each cold plate; According to the radius of each regular circular tubular cold plate, each cold plate is simplified into a regular circular tubular cold plate of a corresponding radius, wherein the relationship between the fluid pressure drop and the flow velocity corresponding to each cold plate remains consistent before and after simplification; In combination with the simplified results, fluid simulation is performed on the multiple battery packs respectively, and the inlet flow rate of each battery pack is recorded according to the simulation results; Determine a maximum value and a minimum value of the inlet flow, and determine a first battery pack corresponding to the maximum value and a second battery pack corresponding to the minimum value as target battery packs; Thermal simulation is performed on the first battery pack and the second battery pack respectively, and the operating temperature of the energy storage system is determined according to the simulation results.

2. The thermal management simulation method for an energy storage system according to claim 1, wherein determining the operating temperature of the energy storage system according to the simulation results comprises: Determine a first maximum temperature value corresponding to the first battery pack according to a thermal simulation result of the first battery pack; Determining a second maximum temperature value corresponding to the second battery pack according to the thermal simulation result of the second battery pack; An operating temperature of the energy storage system is determined according to the first maximum temperature value and the second maximum temperature value.

3. The thermal management simulation method for an energy storage system according to claim 2, wherein determining the operating temperature of the energy storage system according to the first maximum temperature value and the second maximum temperature value comprises: comparing the first maximum temperature value and the second maximum temperature value; When the first maximum temperature value is greater than the second maximum temperature value, the first maximum temperature value is determined as the maximum operating temperature value of the energy storage system, and the difference between the first maximum temperature value and the second maximum temperature value is determined as the maximum operating temperature difference value of the energy storage system; When the first maximum temperature value is less than the second maximum temperature value, the second maximum temperature value is determined as the maximum operating temperature value of the energy storage system, and the difference between the second maximum temperature value and the first maximum temperature value is determined as the maximum operating temperature difference of the energy storage system.

4. The thermal management simulation method for an energy storage system according to claim 1, wherein the cold plate contains a coolant, and before simplification, the plurality of cold plates are serpentine cold plates, and after simplification, the plurality of cold plates are regular circular tubular cold plates.

5. The thermal management simulation method for an energy storage system according to claim 1, wherein establishing a simulation model of the energy storage system comprises: Establishing a physical model of the energy storage system based on the multiple cold plates and the multiple battery packs; Meshing the plurality of cold plates and the plurality of battery packs based on the physical model; A simulation model of the energy storage system is established based on the grid division results.

6. A thermal management simulation device for an energy storage system, comprising: An establishing module configured to establish a simulation model of an energy storage system, wherein the energy storage system includes a plurality of cold plates and a plurality of battery packs, and the plurality of cold plates correspond to the plurality of battery packs one by one; A first simulation module is configured to perform fluid simulation on the plurality of cold plates, and record the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate according to the simulation result; The processing module is configured to determine the radius of each simplified regular tubular cold plate according to the relationship between the fluid pressure drop and the flow velocity corresponding to each cold plate when it is determined that the simplified shapes of the plurality of cold plates are regular tubular shapes; The processing module is further configured to simplify each cold plate into a regular circular tubular cold plate of a corresponding radius according to the radius of each regular circular tubular cold plate, wherein the relationship between the fluid pressure drop and the flow rate corresponding to each cold plate before and after simplification remains consistent; A second simulation module is configured to perform fluid simulation on the plurality of battery packs respectively in combination with the simplified results, and record an inlet flow rate of each battery pack according to the simulation results; a determination module configured to determine a maximum value and a minimum value of the inlet flow, and determine a first battery pack corresponding to the maximum value and a second battery pack corresponding to the minimum value as target battery packs; The determination module is further configured to perform thermal simulation on the first battery pack and the second battery pack respectively, and determine the operating temperature of the energy storage system according to the simulation results.

7. A computing device comprising: Memory and processor; The memory is used to store computer executable instructions, and the processor is used to execute the computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the thermal management simulation method of the energy storage system described in any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the thermal management simulation method for an energy storage system according to any one of claims 1 to 5.

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