A method for analyzing temperature field characteristics of energy storage liquid-cooled battery compartments

Abstract

The application provides a method for analyzing temperature field characteristics of a liquid-cooled battery cabin, which comprises the following steps: performing full-power charge-discharge thermal simulation analysis on a single liquid-cooled battery pack to obtain simulation analysis results of a battery cell module in the single liquid-cooled battery pack; performing flow resistance simulation analysis on a liquid-cooled pipeline in the battery cabin to obtain simulation analysis results of the flow resistance of the liquid-cooled pipeline in the battery cabin; according to the simulation analysis results of the flow resistance of the liquid-cooled pipeline in the battery cabin, the maximum flow and the minimum flow of a liquid-cooled plate of the single liquid-cooled battery pack are counted; performing full-power charge-discharge thermal simulation analysis on the single liquid-cooled battery pack under the conditions of the maximum flow and the minimum flow, respectively, to obtain a temperature difference of the battery cell module in the battery cabin; and according to the temperature difference of the battery cell module in the battery cabin, it is determined whether the heat dissipation system of the battery cabin meets the design requirements. The method is easy to implement, has the advantages of rapid analysis, saving of computing resources and improvement of the efficiency of design and development of the battery cabin.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, and in particular to a method for analyzing temperature field characteristics of an energy storage liquid-cooled battery cabin. BACKGROUND

[0002] Large-scale energy storage systems can help to buffer the imbalance between available power generation and demand or load in power systems. In large-scale energy storage systems, the battery cabin is one of the key components responsible for storing and managing a large amount of electrical energy. The design and performance of the battery cabin directly affect the efficiency, safety and reliability of the entire energy storage system.

[0003] Currently, in the design stage of the energy storage liquid-cooled battery cabin product, numerical simulation software is usually used to directly perform three-dimensional simulation analysis on the entire battery cabin product to predict the temperature field in the cabin during operation of the energy storage liquid-cooled battery cabin. The temperature rise and temperature difference of the battery cell module at the end of the full-power charging and discharging process are used to determine whether the heat dissipation system of the battery cabin is reasonably designed.

[0004] In the process of implementing the present application, the inventors found that at least the following problems exist in the prior art: Directly using numerical simulation software to perform three-dimensional simulation analysis on the entire battery cabin product will result in a grid quantity of tens of millions or even hundreds of millions, which will occupy a large amount of computing resources and consume a long computing time, thereby reducing the efficiency of battery cabin design and development. SUMMARY

[0005] The present application aims to at least partially solve one of the problems in the related art.

[0006] To this end, the present application aims to provide a method for analyzing temperature field characteristics of an energy storage liquid-cooled battery cabin, which is easy to implement, saves simulation time and saves computing resources.

[0007] To achieve the above-mentioned purpose, the present application provides a method for analyzing temperature field characteristics of an energy storage liquid-cooled battery cabin, comprising:

[0008] performing full-power charging and discharging thermal simulation analysis on a single liquid-cooled battery pack to obtain simulation analysis results of the battery cell module in the single liquid-cooled battery pack, wherein the liquid-cooled battery pack comprises a plurality of battery cell modules and a liquid-cooled plate, and the battery cell module is in contact with the liquid-cooled plate;

[0009] performing flow resistance simulation analysis on the liquid-cooled pipe in the battery cabin to obtain simulation analysis results of the flow resistance of the liquid-cooled pipe in the battery cabin;

[0010] According to the simulation analysis results of the flow resistance of the liquid-cooled pipe in the battery cabin, the maximum flow and the minimum flow of the liquid-cooled plate of the single liquid-cooled battery pack are counted;

[0011] The single liquid-cooled battery pack under the maximum flow and minimum flow conditions is respectively subjected to full-power charge-discharge thermal simulation analysis, and the temperature difference of the battery cell module in the battery cabin is obtained;

[0012] According to the temperature difference of the battery cell module in the battery cabin, it is judged whether the heat dissipation system of the battery cabin meets the design requirements.

[0013] According to the method for analyzing the temperature field characteristics of the energy storage liquid-cooled battery cabin, the single liquid-cooled battery pack is respectively subjected to thermal simulation, the liquid-cooled pipe in the battery cabin is subjected to flow resistance simulation, and the single liquid-cooled battery pack under the maximum flow and minimum flow conditions is respectively subjected to full-power charge-discharge thermal simulation analysis. Through the split idea, the temperature field situation in the battery cabin is indirectly predicted. Compared with the prior art of directly performing three-dimensional simulation analysis on the whole battery cabin product, the method is easy to implement, has the advantages of rapid analysis and saving of computing resources.

[0014] According to an embodiment of the present application, the full-power charge-discharge thermal simulation analysis on the single liquid-cooled battery pack obtains the simulation analysis results of the battery cell module in the single liquid-cooled battery pack, including:

[0015] The three-dimensional model of the liquid-cooled battery pack is preprocessed to simplify the three-dimensional model of the liquid-cooled battery pack;

[0016] The simplified three-dimensional model of the liquid-cooled battery pack is imported;

[0017] The three-dimensional model of the simplified liquid-cooled battery pack is meshed;

[0018] The solving equation and boundary condition of the three-dimensional model of the liquid-cooled battery pack are set;

[0019] The single liquid-cooled battery pack is simulated to obtain temperature field data and temperature rise data.

[0020] According to an embodiment of the present application, the flow resistance simulation analysis on the liquid-cooled pipe in the battery cabin obtains the simulation analysis results of the flow resistance of the liquid-cooled pipe in the battery cabin, including:

[0021] The three-dimensional model of the liquid-cooled pipe in the battery cabin is preprocessed to simplify the three-dimensional model of the liquid-cooled pipe;

[0022] The simplified three-dimensional model of the liquid-cooled pipe is imported;

[0023] The three-dimensional model of the simplified liquid-cooled pipe is meshed;

[0024] The solving equation and boundary condition of the three-dimensional model of the liquid-cooled pipe are set;

[0025] The flow and resistance of the liquid-cooled pipe are simulated and solved.

[0026] According to one embodiment of the present application, the pre-processing of the three-dimensional model of the liquid-cooled battery pack and simplifying the three-dimensional model of the liquid-cooled battery pack comprises:

[0027] deleting the upper cover of the liquid-cooled battery pack and components irrelevant to heat transfer of the liquid-cooled battery pack and having a heat transfer influence coefficient less than a preset influence coefficient, and retaining other components.

[0028] According to one embodiment of the present application, it further comprises:

[0029] inputting physical property parameters of the other components, the physical property parameters including density, thermal conductivity and specific heat capacity.

[0030] According to one embodiment of the present application, the other components include a battery cell module, a liquid cooling plate, a heat-conducting pad and a heat-insulating pad.

[0031] According to one embodiment of the present application, the pre-processing of the three-dimensional model of the liquid-cooled battery pack and simplifying the three-dimensional model of the liquid-cooled battery pack comprises:

[0032] deleting the upper cover of the liquid-cooled battery pack and components irrelevant to heat transfer of the liquid-cooled battery pack and having a heat transfer influence coefficient less than a preset influence coefficient, and retaining other components.

[0033] According to one embodiment of the present application, the battery cell module is arranged in an array, the heat-conducting pad is arranged between the battery cell module and the liquid cooling plate, and the heat-insulating pad is arranged between side walls of each adjacent battery cell module.

[0034] According to one embodiment of the present application, the battery compartment comprises a compartment body, a liquid-cooled battery pack and a liquid-cooled pipeline, a plurality of the liquid-cooled battery packs are arranged in the compartment body in a stacked form, the liquid-cooled pipeline has a total liquid inlet and a total liquid outlet, and the liquid-cooled pipeline is connected to the liquid cooling plate of each liquid-cooled battery pack.

[0035] Additional aspects and advantages of the present application will be better understood from the following description taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to further aid the full understanding of the preferred embodiments. The drawings are for purposes of illustration only and are not intended to limit the application thereto. Like reference numerals designate the same parts throughout the drawings. Among them:

[0037] Figure 1 is a structural schematic diagram of a single battery pack in an energy storage liquid-cooled battery compartment according to one embodiment of the present application.

[0038] Figure 2 is a structural schematic diagram of a battery cabin without a cabin body according to an embodiment of the present application.

[0039] Figure 3 is Figure 2 is a structural schematic diagram of a liquid cooling pipe of a battery cabin according to an embodiment of the present application.

[0040] Figure 4 is a flowchart of a method for analyzing temperature field characteristics of a battery cabin according to an embodiment of the present application.

[0041] Legend of reference signs:

[0042] 1 - battery cell module, 2 - liquid cooling plate inlet, 3 - liquid cooling plate outlet, 4 - liquid cooling plate, 5 - thermal insulation pad, 6 - heat conduction pad, 7 - total liquid inlet, 8 - total liquid outlet, 9 - primary pipe, 10 - secondary pipe, 11 - tertiary pipe. DETAILED DESCRIPTION

[0043] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. On the contrary, embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0044] A method for analyzing temperature field characteristics of a battery cabin according to an embodiment of the present application is described below in conjunction with the accompanying drawings.

[0045] In embodiments of the present application, in combination with Figures 1 to 3 As shown in the drawings, the battery cabin includes a cabin body, a liquid-cooled battery pack and a liquid cooling pipe, a plurality of liquid-cooled battery packs are arranged in the cabin body in a stacked form, the liquid cooling pipe has a total liquid inlet 7 and a total liquid outlet 8, and the liquid cooling pipe is connected to the liquid cooling plate 4 of each liquid-cooled battery pack. Each liquid-cooled battery pack includes a battery cell module 1 and a liquid cooling plate 4. The battery cell module 1 can be composed of a plurality of battery cells connected in series and in parallel.

[0046] The cabin body provides structural support for the battery cabin to avoid the liquid-cooled battery pack from being affected by external factors. The liquid cooling pipe is used to transport cooling liquid, so that the cooling liquid can be evenly distributed through the liquid cooling plate 4 to remove the heat generated by the battery cell module 1 during operation.

[0047] Figure 4 is a flowchart of a method for analyzing temperature field characteristics of a battery cabin according to an embodiment of the present application. In combination with Figures 1 to 4 As shown in the drawings, the implementation process of the method for analyzing temperature field characteristics of a battery cabin is as follows:

[0048] Step S102, full-power charging and discharging thermal simulation analysis is performed on the single liquid-cooled battery pack to obtain simulation analysis results of the cell module in the single liquid-cooled battery pack, wherein the liquid-cooled battery pack includes a plurality of cell modules 1 and a liquid-cooled plate 4, and the cell module 1 is in contact with the liquid-cooled plate 4.

[0049] In this embodiment, the battery cabin generally accommodates a plurality of liquid-cooled battery packs, and the sizes of the liquid-cooled battery packs can be consistent or inconsistent. The size and number of the liquid-cooled battery packs are selected according to actual needs, and no specific limitation is made. The cooling flow channel is arranged in the liquid-cooled plate 4. The cooling flow channel has a liquid-cooled plate inlet 2 and a liquid-cooled plate outlet 3, and the cooling flow channel is connected to the liquid-cooled pipeline of the battery cabin through the liquid-cooled plate inlet 2 and the liquid-cooled plate outlet 3. The size and number of the cell module 1 are selected according to actual needs, and no specific limitation is made. The cell module 1 can be in direct contact with the liquid-cooled plate 4. The cell module 1 and the liquid-cooled plate 4 can also be indirectly contacted through a heat-conducting pad 6 or other heat-conducting materials. In this way, the heat-conducting pad 6 is arranged between the cell module and the liquid-cooled plate.

[0050] The arrangement mode of the cell module 1 is set according to actual needs. In one example, the cell module 1 is arranged in an array with multiple rows and multiple columns, and the liquid-cooled battery pack is also provided with a plurality of heat insulation pads 5 arranged between the side walls of adjacent cell modules. The heat insulation pad 5 can block the heat transfer between the cell modules 1, slow down the overheating and out-of-control of a certain cell module 1, and protect the safety of the entire liquid-cooled battery pack.

[0051] Through the thermal simulation analysis of the single liquid-cooled battery pack, the temperature rise of the cell module 1 at the end of charging and discharging under a specific cooling liquid flow rate, the highest and lowest temperatures of the cell module, and the temperature difference of the single liquid-cooled battery pack can be calculated.

[0052] Step S104, flow resistance simulation analysis is performed on the liquid-cooled pipeline in the battery cabin to obtain simulation analysis results of the flow resistance of the liquid-cooled pipeline in the battery cabin.

[0053] In this embodiment, the arrangement of the liquid-cooled pipeline is designed according to actual needs. In one example, the liquid-cooled pipeline includes a primary pipeline 9, a secondary pipeline 10, and a tertiary pipeline 11. The primary pipeline 9 is arranged at the bottom and top of the liquid-cooled battery pack, and the ends of the primary pipeline are the total liquid inlet 7 and the total liquid outlet 8. The secondary pipeline 10 is connected to the primary pipeline 9, and the secondary pipeline 10 is arranged vertically, with one pipeline arranged around each battery module stack. The tertiary pipeline 11 is connected to the secondary pipeline 10, and the tertiary pipeline 11 is used to connect the secondary pipeline 10 to the liquid-cooled plate inlet 2 or the liquid-cooled plate outlet 3, and to connect the liquid-cooled plate inlets 2 and the liquid-cooled plate outlets 3 of adjacent battery module stacks. This hierarchical design of the pipeline can uniformly cool each liquid-cooled battery pack.

[0054] Through the simulation of the battery cabin liquid cooling pipe flow resistance by this step S104, the distribution of the cooling liquid flow can be obtained, that is, how much cooling liquid flows through the liquid cooling plate 4 of each liquid-cooled battery pack.

[0055] Step S106, according to the simulation analysis result of the liquid cooling pipe flow resistance in the battery cabin, the maximum flow and the minimum flow of the liquid cooling plate of a single liquid-cooled battery pack are counted.

[0056] In this embodiment, since the cooling liquid is not exchanged with other heat sources before being distributed to each liquid-cooled battery pack, the temperature of the cooling liquid reaching the inlet of the liquid cooling plate of each liquid-cooled battery pack is equal. The maximum flow and the minimum flow of the liquid cooling plate of a single liquid-cooled battery pack are counted, and the maximum flow and the minimum flow are used as two extreme values to simplify the subsequent simulation process. The simulation process requires a large amount of computing resources and time. By simulating only the extreme conditions, the number of simulations can be significantly reduced, thereby saving computing resources and time.

[0057] Step S108, full-power charging and discharging thermal simulation analysis is performed on a single liquid-cooled battery pack set to the maximum flow and the minimum flow conditions, respectively, to obtain the temperature difference of the battery cell module in the battery cabin.

[0058] In this embodiment, under the conditions of maximum flow and minimum flow, the performance of the battery cabin under extreme conditions can be revealed, which is crucial for evaluating the safety and reliability of the battery cabin. If the battery cabin can operate normally under these extreme conditions, it should also perform well under more common conditions.

[0059] Step S110, according to the temperature difference of the battery cell module in the battery cabin, it is judged whether the heat dissipation system of the battery cabin meets the design requirements.

[0060] In this embodiment, the target of the battery cabin heat dissipation system design includes controlling the temperature difference between the battery cell modules, which should be limited within a reasonable range to ensure the stability and safety of the battery cabin performance. The specific standard of the temperature difference range may vary depending on the battery type and application scenario. According to the experimental verification result, it is judged whether the heat dissipation system meets the design requirements. If it meets the requirements, it can be mass-produced; if it does not meet the requirements, it needs to be further optimized or improved.

[0061] The method for analyzing the temperature field characteristics of the liquid-cooled battery cabin according to the embodiment of the present application, by respectively performing thermal simulation on a single liquid-cooled battery pack, flow resistance simulation on the liquid-cooled pipeline in the battery cabin, and full-power charging and discharging thermal simulation analysis on the single liquid-cooled battery pack under the conditions of maximum flow and minimum flow, indirectly predicts the temperature field in the battery cabin through the split idea, compared with the prior art of directly performing three-dimensional simulation analysis on the entire battery cabin product, the method is easy to implement, has the advantages of fast analysis and saving of computing resources.

[0062] In some embodiments, in step S102, full-power charging and discharging thermal simulation analysis is performed on the single liquid-cooled battery pack to obtain simulation analysis results of the battery cell module in the single liquid-cooled battery pack, including:

[0063] In step S1021, the three-dimensional model of the liquid-cooled battery pack is preprocessed to simplify the three-dimensional model of the liquid-cooled battery pack.

[0064] In this embodiment, the three-dimensional model can be modeled by three-dimensional drawing software. Simplification mainly deletes the upper cover of the liquid-cooled battery pack and components irrelevant to heat transfer of the liquid-cooled battery pack and having a heat transfer influence coefficient less than a preset influence coefficient, and retains other components. For example, other components include battery cell modules, liquid-cooled plates, heat-conducting pads, and heat-insulating pads. At the same time, the pipe wall of the cooling flow channel in the liquid-cooled plate can also be removed, and only the cooling fluid domain (i.e., the volume domain of fluid flow) is retained, and simplifying the three-dimensional model can improve the calculation efficiency.

[0065] In step S1022, the simplified three-dimensional model of the liquid-cooled battery pack is imported.

[0066] In this embodiment, the three-dimensional model is imported into CFD (Computational Fluid Dynamics) software. In addition, the physical property parameters of other components (battery cell modules, liquid-cooled plates, heat-conducting pads, and heat-insulating pads) are input, including density, thermal conductivity, and specific heat capacity, etc.

[0067] In step S1023, the simplified three-dimensional model of the liquid-cooled battery pack is meshed.

[0068] In this embodiment, for key areas such as cooling fluid, the grid can be appropriately encrypted to improve the simulation accuracy.

[0069] In step S1024, the solution equation and boundary conditions of the three-dimensional model of the liquid-cooled battery pack are set.

[0070] In this embodiment, the solution equation mainly includes the mass conservation equation, the momentum conservation equation, the energy conservation equation, and the turbulence equation, etc. The boundary conditions include the liquid-cooled plate inlet and liquid-cooled plate outlet boundary conditions, battery module boundary conditions, etc.

[0071] Step S1025, simulate the single liquid-cooled battery pack to obtain temperature field data and temperature rise data.

[0072] In some embodiments, in step S104, flow resistance simulation analysis is performed on the liquid cooling pipeline in the battery cabin to obtain simulation analysis results of the flow resistance of the liquid cooling pipeline in the battery cabin, including:

[0073] Step S1041, pre-process the three-dimensional model of the liquid cooling pipeline in the battery cabin to simplify the three-dimensional model of the liquid cooling pipeline.

[0074] In this embodiment, simplification includes deleting the pipe wall and components with a cooling fluid flow impact coefficient less than a preset impact coefficient, and retaining the fluid volume domain. The fluid domain of the liquid cooling pipeline is extracted, and the fluid domain of the liquid cooling plate of each liquid-cooled battery pack is extracted. The fluid domain of the liquid cooling pipeline is connected with the external liquid cooling pipeline to form an external pipeline fluid domain continuous from the water outlet of the water chiller to the water return port of the water chiller. The model of the liquid cooling pipeline is simplified, some structural details that do not affect the flow of the cooling fluid are simplified (for example, joints), the pipe wall is removed, and only the fluid volume domain is retained.

[0075] Step S1042, import the simplified three-dimensional model of the liquid cooling pipeline.

[0076] In this embodiment, the three-dimensional model is imported into CFD (Computational Fluid Dynamics) software, the physical properties of the cooling fluid are input, and the simplified three-dimensional model of the liquid cooling pipeline is set as the solution domain of the cooling fluid.

[0077] Step S1043, mesh the simplified three-dimensional model of the liquid cooling pipeline.

[0078] In this embodiment, mesh refinement is performed at key areas such as the inlet and outlet of the liquid cooling pipeline and bends to improve simulation accuracy.

[0079] Step S1044, set the solution equation and boundary conditions of the three-dimensional model of the liquid cooling pipeline.

[0080] In this embodiment, the solution equation includes the mass conservation equation and the momentum conservation equation. During numerical solution, these equations are converted into discrete form for solution on a computer.

[0081] The boundary conditions mainly include inlet boundary conditions, outlet boundary conditions and wall boundary conditions. During boundary condition setting, since there is only a fluid volume domain and no pipe wall model, the boundary of the fluid volume domain is set as a wall, the inlet of the fluid volume domain is set as a mass flow inlet, and the outlet is set as a pressure outlet.

[0082] Step S1045, simulate and solve the flow and resistance of the liquid cooling pipeline.

[0083] In summary, the method of the embodiment of the present application indirectly predicts the temperature field in the battery cabin, including the highest temperature, the lowest temperature and the temperature difference of the battery cell module, by splitting the idea, through thermal simulation of a single liquid-cooled battery pack and through simulation of the liquid-cooled pipe flow and flow resistance in the battery cabin, and has the advantages of fast analysis, saving of computing resources and improvement of the efficiency of battery cabin design and development.

[0084] It should be noted that in the description of the present application, the terms "first", "second" and the like are used only for the purpose of description and should not be understood as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0085] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0086] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0087] In the description of the present application, the terms "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0088] Any procedural or methodological descriptions in flow charts or otherwise described herein can be understood to represent modules, segments, or portions of code that include executable instructions for implementing the steps of a particular logic function or process, and the scope of preferred embodiments of the present application includes additional implementations in which the functions can be performed in an order other than that shown or discussed, including substantially simultaneously or in reverse order, as appropriate, in accordance with the functionality involved, as will be understood by those skilled in the art to which embodiments of the present application pertain.

[0089] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in an appropriate manner.

[0090] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present application.

Claims

1. A method for analyzing the temperature field characteristics of a liquid-cooled energy storage battery compartment, characterized in that: include: Perform full-power charge and discharge thermal simulation analysis on a single liquid-cooled battery pack to obtain simulation analysis results for the battery cell modules within the single liquid-cooled battery pack. The liquid-cooled battery pack includes multiple battery cell modules and a liquid cooling plate, and the battery cell modules are in contact with the liquid cooling plate. Perform flow and resistance simulation analysis on the liquid cooling pipes in the battery compartment to obtain simulation analysis results of the flow and resistance of the liquid cooling pipes in the battery compartment; Based on the simulation analysis results of the flow resistance of the liquid cooling pipes in the battery compartment, the maximum and minimum flow rates of the liquid cooling plate of a single liquid-cooled battery pack are calculated; Full-power charge and discharge thermal simulation analysis was performed on a single liquid-cooled battery pack at both maximum and minimum flow rates to determine the temperature difference between the battery modules within the battery compartment. Based on the temperature difference of the battery cell modules in the battery compartment, determine whether the battery compartment's heat dissipation system meets the design requirements.

2. The method for analyzing the temperature field characteristics of the energy storage liquid-cooled battery compartment according to claim 1, characterized in that: The full-power charge and discharge thermal simulation analysis of a single liquid-cooled battery pack is performed to obtain simulation analysis results of the battery cell modules in the single liquid-cooled battery pack, including: Pre-process the 3D model of the liquid-cooled battery pack to simplify the 3D model; Import the simplified 3D model of the liquid-cooled battery pack; Mesh the simplified 3D model of the liquid-cooled battery pack; Set up solution equations and boundary conditions for the 3D model of the liquid-cooled battery pack; A single liquid-cooled battery pack is simulated to obtain temperature field data and temperature rise data.

3. The method for analyzing the temperature field characteristics of the energy storage liquid-cooled battery compartment according to claim 1, characterized in that: The flow rate and flow resistance simulation analysis of the liquid cooling pipeline in the battery compartment is performed to obtain the simulation analysis results of the flow rate and flow resistance of the liquid cooling pipeline in the battery compartment, including: Pre-process the 3D model of the liquid cooling pipes in the battery compartment to simplify the 3D model; Import the simplified 3D model of the liquid cooling pipeline; Mesh the simplified three-dimensional model of the liquid cooling pipeline; Set up solution equations and boundary conditions for the 3D model of the liquid cooling circuit; The flow rate and flow resistance of the liquid cooling pipeline are simulated and solved.

4. The method for analyzing the temperature field characteristics of the energy storage liquid-cooled battery compartment according to claim 2, characterized in that: The pre-processing of the three-dimensional model of the liquid-cooled battery pack to simplify the three-dimensional model of the liquid-cooled battery pack includes: Delete the upper cover of the liquid-cooled battery pack and components that are not related to the heat transfer of the liquid-cooled battery pack and whose heat transfer influence coefficient is less than the preset influence coefficient, and retain other components.

5. The method for analyzing the temperature field characteristics of the energy storage liquid-cooled battery compartment according to claim 4 is characterized in that: Also includes: The physical property parameters of the other components are input, where the physical property parameters include density, thermal conductivity, and specific heat capacity.

6. The method for analyzing the temperature field characteristics of the energy storage liquid-cooled battery compartment according to claim 4, characterized in that: The other components include battery cell modules, liquid cooling plates, thermal pads and thermal insulation pads.

7. The method for analyzing the temperature field characteristics of a liquid-cooled energy storage battery compartment according to claim 3, characterized in that: The pre-processing of the three-dimensional model of the liquid cooling pipeline in the battery compartment to simplify the three-dimensional model of the liquid cooling pipeline includes: Delete the pipe wall and components whose influence coefficient on coolant flow is less than the preset influence coefficient, and retain the fluid volume domain.

8. The method for analyzing the temperature field characteristics of a liquid-cooled energy storage battery compartment according to claim 6, characterized in that: The battery cell modules are arranged in an array, the thermal pads are arranged between the battery cell modules and the liquid cooling plate, and the thermal insulation pads are arranged between the side walls of each adjacent battery cell module.

9. The method for analyzing the temperature field characteristics of a liquid-cooled energy storage battery compartment according to any one of claims 1 to 8, characterized in that: The battery compartment includes a compartment body, a liquid-cooled battery pack, and a liquid cooling pipeline. Multiple liquid-cooled battery packs are stacked in the compartment body. The liquid cooling pipeline has a total liquid inlet and a total liquid outlet. The liquid cooling pipeline is connected to the liquid cooling plate of each liquid-cooled battery pack.

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