Method for analyzing temperature field characteristics of energy storage liquid-cooled battery compartment

Abstract

The invention provides a method for analyzing temperature field characteristics of an energy storage liquid-cooled battery compartment, which comprises the following steps: carrying out full-power charge-discharge thermal simulation analysis on a single liquid-cooled battery pack to obtain a simulation analysis result of a battery cell module in the single liquid-cooled battery pack; performing flow and flow resistance simulation analysis on the liquid cooling pipeline in the battery cabin to obtain a simulation analysis result of the flow and flow resistance of the liquid cooling pipeline in the battery cabin; counting the maximum flow and the minimum flow of a liquid cooling plate of a single liquid cooling battery pack according to the simulation analysis result of the flow resistance of the liquid cooling pipeline in the battery cabin; respectively carrying out full-power charging and discharging thermal simulation analysis on the single liquid-cooled battery packs under the conditions of the maximum flow and the minimum flow to obtain the temperature difference of the battery cell modules in the battery cabin; according to the temperature difference of the battery cell modules in the battery compartment, whether the heat dissipation system of the battery compartment meets the design requirement or not is judged. The method is easy to implement, and has the advantages of being rapid in analysis, saving computing resources and improving the design and development efficiency of the battery compartment.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a method for analyzing temperature field characteristics of an energy storage liquid-cooled battery compartment. Background Art

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

[0003] At present, during the design stage of energy storage liquid-cooled battery compartment products, numerical simulation software is usually used to directly perform three-dimensional simulation analysis on the entire battery compartment product, predict the temperature field inside the compartment when the energy storage liquid-cooled battery compartment is in operation, and judge whether the battery compartment's heat dissipation system is reasonably designed by measuring the temperature rise and temperature difference of the battery cell modules in the battery compartment at the end of the full-power charging and discharging process.

[0004] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art: when numerical simulation software is used to directly perform three-dimensional simulation analysis on the entire battery compartment product, the number of grids divided by the software, with high mesh quality, eliminating simulation errors, and able to more accurately reproduce the actual physical scene will reach tens of millions or even hundreds of millions, which will occupy a large amount of computing resources and consume a long computing time, reducing the efficiency of battery compartment design and development. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, the purpose of the present invention is to propose a method for analyzing the temperature field characteristics of a liquid-cooled energy storage battery compartment, which is easy to implement, saves simulation time and saves computing resources.

[0007] To achieve the above object, the present invention proposes a method for analyzing the temperature field characteristics of a liquid-cooled energy storage battery compartment, comprising:

[0008] Perform full-power charge and 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, wherein the liquid-cooled battery pack includes a plurality of battery cell modules and a liquid cooling plate, and the battery cell modules are in contact with the liquid cooling plate;

[0009] Perform flow resistance simulation analysis on the liquid cooling pipeline in the battery compartment to obtain simulation analysis results of flow resistance of the liquid cooling pipeline in the battery compartment;

[0010] According to the simulation analysis results of the flow resistance of the liquid cooling pipeline in the battery compartment, the maximum flow and minimum flow of the liquid cooling plate of a single liquid-cooled battery pack are calculated;

[0011] Perform full-power charge and discharge thermal simulation analysis on a single liquid-cooled battery pack set at maximum and minimum flow conditions to obtain the temperature difference of the battery cell module in the battery compartment;

[0012] Based on the temperature difference of the battery cell modules in the battery compartment, determine whether the heat dissipation system of the battery compartment meets the design requirements.

[0013] According to the method for analyzing the temperature field characteristics of the energy storage liquid-cooled battery compartment according to the embodiment of the present invention, by performing thermal simulation on a single liquid-cooled battery pack, flow resistance simulation on the liquid cooling pipeline in the battery compartment, and full-power charge and discharge thermal simulation analysis on a single liquid-cooled battery pack set under maximum flow and minimum flow conditions, the temperature field conditions in the battery compartment are indirectly predicted through the idea of ​​splitting. Compared with the prior art of directly performing three-dimensional simulation analysis on the entire battery compartment product, this method is easy to implement and has the advantages of fast analysis and saving computing resources.

[0014] According to one embodiment of the present invention, the full-power charge and discharge thermal simulation analysis of a single liquid-cooled battery pack is performed to obtain the simulation analysis results of the battery cell modules in the single liquid-cooled battery pack, including:

[0015] Pre-process the three-dimensional model of the liquid-cooled battery pack to simplify the three-dimensional model of the liquid-cooled battery pack;

[0016] Import the simplified 3D model of the liquid-cooled battery pack;

[0017] Mesh the simplified 3D model of the liquid-cooled battery pack;

[0018] Set up solution equations and boundary conditions for the 3D model of the liquid-cooled battery pack;

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

[0020] According to one embodiment of the present invention, the flow rate and flow resistance simulation analysis of the liquid cooling pipeline in the battery compartment is performed to obtain the simulation analysis result of the flow rate and flow resistance of the liquid cooling pipeline in the battery compartment, including:

[0021] Pre-process the 3D model of the liquid cooling pipeline in the battery compartment to simplify the 3D model of the liquid cooling pipeline;

[0022] Import the simplified 3D model of the liquid cooling pipeline;

[0023] Meshing the simplified three-dimensional model of the liquid cooling pipeline;

[0024] Set up solution equations and boundary conditions for the 3D model of the liquid cooling circuit;

[0025] The flow rate and flow resistance of the liquid cooling pipeline are simulated and solved.

[0026] According to one embodiment of the present invention, 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:

[0027] Delete the upper cover of the liquid-cooled battery pack and components that are irrelevant 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.

[0028] According to one embodiment of the present invention, it also includes:

[0029] The physical property parameters of the other components are input, wherein the physical property parameters include density, thermal conductivity and specific heat capacity.

[0030] According to one embodiment of the present invention, the other components include a battery cell module, a liquid cooling plate, a thermal conductive pad and a thermal insulation pad.

[0031] According to one embodiment of the present invention, 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:

[0032] Delete the pipe wall and the components whose influence coefficient on coolant flow is less than the preset influence coefficient, and retain the fluid volume domain.

[0033] According to one embodiment of the present invention, the battery cell modules are arranged in an array, the thermal conductive 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.

[0034] According to one embodiment of the present invention, the battery compartment includes a compartment body, a liquid-cooled battery pack and a liquid cooling pipeline. A plurality of the 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 of the liquid-cooled battery packs.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. Among them:

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

[0038] Figure 2 It is a structural schematic diagram of an energy storage liquid-cooled battery compartment without a compartment body according to an embodiment of the present invention.

[0039] Figure 3 yes Figure 2 It is a structural schematic diagram of a liquid cooling pipeline of an energy storage liquid-cooled battery compartment according to an embodiment of the present invention.

[0040] Figure 4 It is a flow chart of a method for analyzing temperature field characteristics of a liquid-cooled energy storage battery compartment according to an embodiment of the present invention.

[0041] Description of reference numerals:

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

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limitations of the present invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0044] The following describes a method for analyzing the temperature field characteristics of an energy storage liquid-cooled battery compartment according to an embodiment of the present invention in conjunction with the accompanying drawings.

[0045] In the embodiment of the present invention, combined with Figures 1 to 3 As shown, 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 7 and a total liquid outlet 8. The liquid cooling pipeline 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 parallel.

[0046] The cabin provides structural support for the battery cabin to prevent the liquid-cooled battery pack from being affected by external factors. The liquid cooling pipeline is used to transport the coolant so that the coolant can flow evenly through the liquid cooling plate 4 to take away the heat generated by the battery cell module 1 when it is working.

[0047] Figure 4 FIG. 1 is a flow chart of a method for analyzing the temperature field characteristics of a liquid-cooled battery compartment according to an embodiment of the present invention. Figures 1 to 4 As shown, the implementation process of the method for analyzing the temperature field characteristics of the energy storage liquid-cooled battery compartment is as follows:

[0048] Step S102 , performing full-power charge and discharge thermal simulation analysis on a single liquid-cooled battery pack to obtain simulation analysis results of the battery cell modules in the single liquid-cooled battery pack, wherein the liquid-cooled battery pack includes multiple battery cell modules 1 and a liquid cooling plate 4 , and the battery cell modules 1 are in contact with the liquid cooling plate 4 .

[0049] In this embodiment, the battery compartment usually accommodates multiple liquid-cooled battery packs, and the sizes of these liquid-cooled battery packs may be consistent or inconsistent. The size and quantity of the liquid-cooled battery packs are selected according to actual needs, and there is no specific restriction on this. A cooling channel is arranged in the liquid cooling plate 4. The cooling channel has a liquid cooling plate inlet 2 and a liquid cooling plate outlet 3, and the cooling channel is connected to the liquid cooling pipeline of the battery compartment through the liquid cooling plate inlet 2 and the liquid cooling plate outlet 3. The size and quantity of the battery cell module 1 are selected according to actual needs, and there is no specific restriction on this. The battery cell module 1 can be in direct contact with the liquid cooling plate 4. The battery cell module 1 and the liquid cooling plate 4 can also be indirectly in contact through a heat-conducting material such as a thermal pad 6. In this way, the thermal pad 6 is arranged between the battery cell module and the liquid cooling plate.

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

[0051] Through thermal simulation analysis of a single liquid-cooled battery pack, it is possible to calculate the temperature rise of the cell module 1 at the end of charge and discharge, the maximum and minimum temperatures of the cell module, and the temperature difference under a specific coolant flow rate.

[0052] Step S104, performing flow rate and flow resistance simulation analysis on the liquid cooling pipeline in the battery compartment to obtain simulation analysis results of the flow rate and flow resistance of the liquid cooling pipeline in the battery compartment.

[0053] In this embodiment, the arrangement of the liquid cooling pipeline is designed according to actual needs. In one example, the liquid cooling 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, respectively. 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 with the liquid cooling plate inlet 2 or the liquid cooling plate outlet 3, as well as to connect the liquid cooling plate inlet 2 and the liquid cooling plate outlet 3 of the adjacent battery module stack. This hierarchical design of the pipeline enables each liquid-cooled battery pack to be evenly cooled.

[0054] By simulating the flow resistance of the battery compartment liquid cooling pipeline in step S104, the distribution of the coolant flow can be learned, that is, how much coolant flows through the liquid cooling plate 4 of each liquid-cooled battery pack.

[0055] Step S106, according to the simulation analysis results of the flow resistance of the liquid cooling pipeline in the battery compartment, the maximum flow rate and the minimum flow rate of the liquid cooling plate of a single liquid-cooled battery pack are calculated.

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

[0057] Step S108, performing full-power charge and discharge thermal simulation analysis on a single liquid-cooled battery pack set at maximum flow and minimum flow conditions, respectively, to obtain the temperature difference of the battery cell modules in the battery compartment.

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

[0059] Step S110, judging whether the heat dissipation system of the battery compartment meets the design requirements according to the temperature difference of the battery cell modules in the battery compartment.

[0060] In this embodiment, the goal of the battery compartment heat dissipation system design includes controlling the temperature difference between the battery modules. This temperature difference should be limited to a reasonable range to ensure the stability and safety of the battery compartment performance. The specific standards for the temperature difference range will vary depending on the battery type and application scenario. Based on the experimental verification results, determine whether the heat dissipation system meets the design requirements. If the requirements are met, mass production can be carried out; if not, further optimization or improvement is required.

[0061] According to the method for analyzing the temperature field characteristics of the energy storage liquid-cooled battery compartment according to the embodiment of the present invention, by performing thermal simulation on a single liquid-cooled battery pack, flow resistance simulation on the liquid cooling pipeline in the battery compartment, and full-power charge and discharge thermal simulation analysis on a single liquid-cooled battery pack set under maximum flow and minimum flow conditions, the temperature field conditions in the battery compartment are indirectly predicted through the idea of ​​splitting. Compared with the prior art of directly performing three-dimensional simulation analysis on the entire battery compartment product, this method is easy to implement and has the advantages of fast analysis and saving computing resources.

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

[0063] Step S1021 , pre-processing the three-dimensional model of the liquid-cooled battery pack 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 mapping software. The simplification mainly involves deleting the upper cover of the liquid-cooled battery pack and the components that are irrelevant to the heat transfer of the liquid-cooled battery pack and whose heat transfer influence coefficient is less than the preset influence coefficient, and retaining other components. For example, other components include battery cell modules, liquid cooling plates, thermal pads and thermal insulation pads. At the same time, the tube wall of the cooling channel in the liquid cooling plate can also be removed, retaining only the coolant fluid domain (i.e., the volume domain where the fluid flows). Simplifying the three-dimensional model can improve calculation efficiency.

[0065] Step S1022, importing a simplified three-dimensional model of the liquid-cooled battery pack.

[0066] In this embodiment, the three-dimensional model is imported into CFD (computational fluid dynamics) software. In addition, the physical parameters of other components (battery core module, liquid cooling plate, thermal pad and thermal insulation pad) are input, and the physical parameters include density, thermal conductivity and specific heat capacity.

[0067] Step S1023, meshing the simplified three-dimensional model of the liquid-cooled battery pack.

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

[0069] Step S1024, setting the solution equations and boundary conditions of the three-dimensional model of the liquid-cooled battery pack.

[0070] In this embodiment, the equations to be solved mainly include mass conservation equation, momentum conservation equation, energy conservation equation and turbulence equation, etc. Boundary conditions include liquid cooling plate inlet and liquid cooling plate outlet boundary conditions, battery module boundary conditions, etc.

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

[0072] In some embodiments, in step S104, a flow rate and flow resistance simulation analysis is performed on the liquid cooling pipeline in the battery compartment to obtain a simulation analysis result of the flow rate and flow resistance of the liquid cooling pipeline in the battery compartment, including:

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

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

[0075] Step S1042, importing 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 property parameters of the coolant are input, and the simplified three-dimensional model of the liquid cooling pipeline is set as the solution domain of the coolant.

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

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

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

[0080] In this embodiment, the equations to be solved include the mass conservation equation and the momentum conservation equation. In the numerical solution process, these equations are converted into discretized forms so as to be solved on a computer.

[0081] The boundary conditions mainly include inlet boundary conditions, outlet boundary conditions and wall boundary conditions. In the process of 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 to the wall, the inlet of the fluid volume domain is set to the mass flow inlet, and the outlet is set to the pressure outlet.

[0082] Step S1045, simulating and solving the flow rate and flow resistance of the liquid cooling pipeline.

[0083] In summary, the method of the embodiment of the present invention indirectly predicts the temperature field conditions in the battery compartment, including the maximum temperature, minimum temperature and temperature difference of the battery cell module, through the thermal simulation of a single liquid-cooled battery pack and the simulation of the flow and flow resistance of the liquid cooling pipeline in the battery compartment, through the idea of ​​splitting, and has the advantages of fast analysis, saving computing resources and improving the efficiency of battery compartment design and development.

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

[0085] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0086] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean 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, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0087] In the description of the present invention, the directions or positional relationships indicated by the terms "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0088] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0089] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0090] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

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 of a battery cell module in the single liquid-cooled battery pack, wherein the liquid-cooled battery pack includes a plurality of battery cell modules and a liquid cooling plate, and the battery cell modules are in contact with the liquid cooling plate; Perform flow resistance simulation analysis on the liquid cooling pipeline in the battery compartment to obtain simulation analysis results of flow resistance of the liquid cooling pipeline in the battery compartment; According to the simulation analysis results of the flow resistance of the liquid cooling pipeline in the battery compartment, the maximum flow and minimum flow of the liquid cooling plate of a single liquid-cooled battery pack are calculated; Perform full-power charge and discharge thermal simulation analysis on a single liquid-cooled battery pack set at maximum and minimum flow conditions to obtain the temperature difference of the battery cell module in the battery compartment; Based on the temperature difference of the battery cell modules in the battery compartment, determine whether the heat dissipation system of the battery compartment 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 is characterized in that: The full-power charge and discharge thermal simulation analysis of a single liquid-cooled battery pack is performed to obtain the simulation analysis results of the battery cell modules in the single liquid-cooled battery pack, including: Pre-process the three-dimensional model of the liquid-cooled battery pack to simplify the three-dimensional model of the liquid-cooled battery pack; 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 is 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 result 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 pipeline in the battery compartment to simplify the 3D model of the liquid cooling pipeline; Import the simplified 3D model of the liquid cooling pipeline; Meshing 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 is 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 irrelevant 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, wherein 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 is characterized in that: The other components include a battery cell module, a liquid cooling plate, a thermal conductive pad and a thermal insulation pad.

7. The method for analyzing the temperature field characteristics of the energy storage liquid-cooled battery compartment according to claim 3 is 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 the 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 the energy storage liquid-cooled battery compartment according to claim 6, characterized in that: The battery cell modules are arranged in an array, the thermal conductive 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 battery compartment for energy storage 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. A plurality of the 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 of the liquid-cooled battery packs.

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