CN-121145389-B - Simulation analysis method of double-path liquid cooling energy storage system
Abstract
The invention discloses a simulation analysis method of a double-path liquid cooling energy storage system, which belongs to the technical field of double-path liquid cooling energy storage systems and comprises the steps of constructing a double-path liquid cooling energy storage system simulation analysis mathematical model, setting boundary conditions, collecting real-time data of the double-path liquid cooling energy storage system, performing simulation on the real-time data of the double-path liquid cooling energy storage system according to the double-path liquid cooling energy storage system simulation analysis mathematical model, determining a double-path liquid cooling energy storage system simulation analysis result, and optimizing a cooling plate design, a flow channel layout or a cooling liquid flow according to the double-path liquid cooling energy storage system simulation analysis result so as to optimize a thermal management design. The invention solves the problems that the existing two-way liquid cooling energy storage system cannot be effectively simulated and analyzed, the heat management design cannot be effectively optimized, the system performance is improved, and the using effect is poor. The invention can effectively simulate and analyze the double-path liquid cooling energy storage system, can effectively optimize the heat management design, improves the system performance, and can improve the use effect of the double-path liquid cooling energy storage system.
Inventors
- YANG JIYONG
Assignees
- 江苏通合新材料科技有限公司
Dates
- Publication Date
- 20260512
- Application Date
- 20250812
Claims (9)
- 1. The simulation analysis method of the double-path liquid cooling energy storage system is characterized by comprising the following steps of: Constructing a simulation analysis mathematical model of the double-path liquid cooling energy storage system, and deploying the simulation analysis mathematical model of the double-path liquid cooling energy storage system in an actual simulation analysis environment of the double-path liquid cooling energy storage system; Setting boundary conditions, collecting real-time data of the two-way liquid cooling energy storage system, and carrying out simulation on the real-time data of the two-way liquid cooling energy storage system according to a simulation analysis mathematical model of the two-way liquid cooling energy storage system to determine a simulation analysis result of the two-way liquid cooling energy storage system; optimizing the design of a cooling plate, the flow channel layout or the flow of cooling liquid according to the simulation analysis result of the two-way liquid cooling energy storage system, and optimizing the design of heat management; collecting real-time data of the two-way liquid cooling energy storage system, and executing the following operations: establishing a geometric model of the double-path liquid cooling energy storage system by adopting three-dimensional modeling software, wherein the geometric model comprises a cooling plate, cooling liquid, a cold liquid pump, a heat exchanger, a liquid storage tank and a battery module assembly; the cooling liquid pump pumps the cooling liquid out of the liquid storage tank, the cooling liquid flows through the cooling plate to absorb heat of the battery module, then the cooling liquid enters the heat exchanger to release heat, and the cooling liquid flows back to the liquid storage tank to form circulation; The method comprises the steps of monitoring and collecting capacity, internal resistance, charge-discharge curves and heat generation rate of a battery module in real time based on intelligent collecting equipment to obtain battery module data; Based on intelligent acquisition equipment, the flow rate, temperature, pressure, flow direction, specific heat capacity, heat conductivity coefficient and viscosity of the cooling liquid are monitored and acquired in real time, and cooling liquid data are obtained; and forming real-time data of the double-path liquid cooling energy storage system according to the battery module data and the cooling liquid data.
- 2. The simulation analysis method of the two-way liquid cooling energy storage system according to claim 1, wherein a two-way liquid cooling energy storage system simulation analysis mathematical model is constructed, and the following operations are performed: Collecting historical data of the two-way liquid cooling energy storage system, dividing the collected historical data of the two-way liquid cooling energy storage system, and dividing the historical data of the two-way liquid cooling energy storage system into a training set and a testing set; Based on a machine learning technology, training a machine learning model by adopting a training set, enabling the machine learning model to autonomously learn simulation analysis behaviors of the two-way liquid cooling energy storage system from the training set, automatically analyzing the flowing and temperature distribution situation of cooling liquid, and determining a simulation analysis mathematical model of the two-way liquid cooling energy storage system; Based on the test set, testing and verifying the simulation analysis mathematical model of the two-way liquid cooling energy storage system, evaluating the analysis performance of the simulation analysis mathematical model of the two-way liquid cooling energy storage system, and determining the test result of the mathematical model; And optimizing parameters of the simulation analysis mathematical model of the double-path liquid cooling energy storage system according to the mathematical model test result, and determining the optimal simulation analysis mathematical model of the double-path liquid cooling energy storage system.
- 3. The simulation analysis method of the two-way liquid cooling energy storage system according to claim 2, wherein the simulation analysis is performed on the two-way liquid cooling energy storage system, and the following operations are performed: deploying a simulation analysis mathematical model of the two-way liquid cooling energy storage system, and deploying the simulation analysis mathematical model of the two-way liquid cooling energy storage system in an actual simulation analysis environment of the two-way liquid cooling energy storage system; setting boundary conditions including the flow rate, temperature, pressure and flow direction of the cooling liquid; Inputting the real-time data of the two-way liquid cooling energy storage system into a simulation analysis mathematical model of the two-way liquid cooling energy storage system, performing simulation on the real-time data of the two-way liquid cooling energy storage system according to the simulation analysis mathematical model of the two-way liquid cooling energy storage system, analyzing the flow, pressure and temperature distribution conditions of cooling liquid, acquiring data of a temperature field, a pressure field and a flow field, and determining simulation analysis results of the two-way liquid cooling energy storage system.
- 4. The simulation analysis method of the two-way liquid cooling energy storage system according to claim 3, wherein the two-way liquid cooling energy storage system real-time data is processed, and the following operations are performed: Cleaning the real-time data of the double-path liquid cooling energy storage system, removing noise in the real-time data of the double-path liquid cooling energy storage system, identifying abnormal values related to simulation analysis of the double-path liquid cooling energy storage system in the real-time data of the double-path liquid cooling energy storage system, and correcting the abnormal values; converting the real-time data of the two-way liquid cooling energy storage system, converting the real-time data of the two-way liquid cooling energy storage system into a unified data format, and removing dimension differences in the real-time data of the two-way liquid cooling energy storage system to form standardized real-time data of the two-way liquid cooling energy storage system.
- 5. The simulation analysis method of the two-way liquid cooling energy storage system according to claim 4, wherein the two-way liquid cooling energy storage system simulation analysis mathematical model is tested and verified based on a test set, and the following operations are executed: Inputting the test set into a simulation analysis mathematical model of the two-way liquid cooling energy storage system, testing the simulation analysis mathematical model of the two-way liquid cooling energy storage system according to the test set, verifying the simulation performance of the simulation analysis mathematical model of the two-way liquid cooling energy storage system, and evaluating whether the simulation analysis mathematical model of the two-way liquid cooling energy storage system can achieve the expected effect of performing simulation analysis on the two-way liquid cooling energy storage system; When the simulation analysis mathematical model of the double-path liquid cooling energy storage system can achieve the expected effect of performing simulation analysis on the double-path liquid cooling energy storage system, directly determining the optimal simulation analysis mathematical model of the double-path liquid cooling energy storage system; When the simulation analysis mathematical model of the two-way liquid cooling energy storage system cannot achieve the expected effect of simulation analysis on the two-way liquid cooling energy storage system, parameter adjustment and optimization are carried out on the simulation analysis mathematical model of the two-way liquid cooling energy storage system until the simulation analysis mathematical model of the two-way liquid cooling energy storage system can achieve the expected effect of simulation analysis on the two-way liquid cooling energy storage system, and the optimal simulation analysis mathematical model of the two-way liquid cooling energy storage system is determined.
- 6. The simulation analysis method of the two-way liquid cooling energy storage system according to claim 5, wherein the following operations are performed by optimizing a cooling plate design, a flow channel layout or a cooling liquid flow rate according to a simulation analysis result of the two-way liquid cooling energy storage system: according to simulation analysis results of the two-way liquid cooling energy storage system, temperature distribution of the battery module is analyzed, thermal uniformity and whether hot spots exist or not are evaluated, cooling plate design, flow channel layout or cooling liquid flow rate are optimized according to cooling liquid flow, pressure and temperature distribution conditions, and thermal management design is optimized.
- 7. The method of claim 6, wherein optimizing the thermal management design performs the following: According to the speed field data of the cooling liquid in different areas, the flow channel design is adjusted, the cross section shape of the flow channel is optimized or the area with higher flow speed is increased, so that the flow efficiency of the cooling liquid is improved; According to the pressure loss in the flowing process of the cooling liquid, the pressure drop of the elbow, the valve and the pump component is focused, the flow channel layout is optimized, the elbow and the local resistance component are reduced, or the flow of the cooling liquid is regulated to reduce the pressure loss; According to the temperature field data of the cooling liquid in different areas, the temperature difference between an inlet and an outlet of the cooling liquid and the temperature distribution uniformity of the cooling liquid are concerned, and the heat exchange efficiency of the cooling liquid and the battery module is optimized by adjusting the flow rate of the cooling liquid or the design of a cooling plate; According to the distribution of the temperature field of the battery modules, the temperature difference between the battery monomers is calculated, and the heat uniformity between the battery modules is improved by adjusting the design of the cooling plate or optimizing the flow of cooling liquid; And identifying a region with the temperature exceeding a set threshold value according to a local high-temperature region of the temperature field of the battery module in combination with heat flow vector analysis, optimizing a cooling liquid flow path for hot spots, or increasing the local heat dissipation capacity of the cooling plate.
- 8. The simulation analysis method of the two-way liquid cooling energy storage system according to claim 7, wherein analyzing the temperature distribution of the battery module to evaluate the thermal uniformity and the existence of hot spots comprises: Acquiring a temperature value of each time point of each liquid cooling loop in the battery module; calculating the difference between the temperature value of each time point and the temperature average value in the liquid cooling loop to obtain temperature deviation; Carrying out space-time weighted accumulation on each temperature deviation in the liquid cooling loop, and taking the ratio of the temperature deviation to the sum of squares of the maximum deviation as a first ratio in the liquid cooling loop; Taking the average value of the first ratio in each liquid cooling loop as the thermal uniformity index of the battery module; Wherein, the M represents the total number of liquid cooling loops in a single battery module; the temperature value of the kth time point in the jth liquid cooling loop in the ith battery module is represented; representing the total number of time points; Representing the temperature average value in the ith battery module; representing a discrete window function; representing the sum of the squares of the maximum deviations allowed by the design; Comparing the thermal uniformity index of the battery module with a preset thermal uniformity index threshold, wherein if the thermal uniformity index of the battery module is larger than or equal to the preset thermal uniformity index threshold, the thermal uniformity index of the battery module is poor; Calculating the difference value between the temperature value of each time point and the hot spot temperature threshold value in the liquid cooling loop to obtain an overheat temperature difference value; Performing space-time weighted hazard accumulation on each overheat temperature difference value in the liquid cooling loop, and determining the hot spot index of the battery module by the ratio of the space-time weighted hazard accumulation to the maximum overheat integral; Wherein, the Indicating a hot spot index of the i-th battery module; Representing an indication function; indicating a hot spot temperature threshold; Representing the maximum superheat integral allowed by the design; representing a hot spot punishment coefficient; And comparing the hot spot index of the battery module with a preset hot spot index threshold, if the hot spot index of the battery module is larger than or equal to the preset hot spot index threshold, the battery module is seriously hot spot-contained in the battery module, and if the hot spot index of the battery module is smaller than the preset hot spot index threshold, the battery module is not hot spot-contained in the battery module.
- 9. The method of claim 2, wherein collecting historical data of the two-way liquid-cooled energy storage system and dividing the collected historical data of the two-way liquid-cooled energy storage system comprises: collecting historical data of the double-path liquid cooling energy storage system, obtaining battery module data and cooling liquid data in the historical data of the double-path liquid cooling energy storage system, and binding the battery module data with the cooling liquid data in a corresponding cooling loop; aligning the bound battery module data with the corresponding cooling liquid data in the cooling loop based on the time stamp to obtain aligned data; taking all the alignment data as a system global data set; Obtaining thermocouple array data of the surface of a battery module in the battery module data, and interpolating and complementing the thermocouple array data to generate battery module temperature sensor array data; The method comprises the steps of obtaining flow direction values of different positions in double-path circulation in cooling liquid data, and generating spatial distribution vector data of the cooling liquid flow direction by sequencing the flow direction values of different positions according to spatial coordinates; acquiring pressure values of key position monitoring points of a pipeline in the coolant data, arranging the pressure values of a key position pressure value sequence according to a position sequence to generate a pipeline pressure value sequence, and taking the pipeline pressure value sequence as pipeline pressure monitoring point data; acquiring flow velocity profile data of a plurality of sampling points included in the section of a pipeline in the cooling liquid data, and taking the flow velocity profile data as sampling value data of a flow velocity field of the cooling liquid; taking the array data of the battery module temperature sensor, the spatial distribution vector data of the flowing direction of the cooling liquid, the data of the pipeline pressure monitoring points and the sampling value data of the flow velocity field of the cooling liquid as the basic layer spatial characteristics of the global data set of the system; determining a temperature gradient-flow rate coupling factor based on battery module temperature sensor array data and coolant flow rate field sampling value data in the basic layer space characteristics; determining a pressure fluctuation-flow correlation index based on pipeline pressure monitoring point data in the spatial characteristics of the base layer and flow data in the cooling liquid data; Generating derived inter-layer field coupling features based on the time sequence by using the temperature gradient-flow velocity coupling factor and the pressure fluctuation-flow rate correlation index, and performing time alignment on the derived inter-layer field coupling features and the base layer features; Interpolating and expanding dimensions of the sampling value data of the flow field of the cooling liquid and the array data of the temperature sensor of the battery module to generate a flow field distribution matrix and a temperature field distribution matrix; Determining a pressure gradient based on pipeline pressure monitoring point data, and calculating the association degree of the pressure gradient and the design contact area of the cooling plate; Generating a correlation layer global feature based on the Pearson correlation coefficient and the correlation degree, and aligning the correlation layer global feature with a basic layer space feature and a derived layer inter-field coupling feature; dividing the total feature set based on a preset proportion.
Description
Simulation analysis method of double-path liquid cooling energy storage system Technical Field The invention relates to the technical field of double-path liquid cooling energy storage systems, in particular to a simulation analysis method of a double-path liquid cooling energy storage system. Background The two-way liquid cooling energy storage system is composed of key components including 1) cooling liquid, usually water-glycol solution, with high heat conducting performance, 2) cooling plates/pipes, which are in direct contact with the battery module to absorb heat, 3) a cooling liquid pump, which drives the cooling liquid to circulate in the system, 4) a heat exchanger, which distributes heat from the cooling liquid through air or water cooling, 5) a liquid storage tank, which stores the cooling liquid and provides circulating power, and 6) a control system, which comprises temperature, flow rate and pressure sensors, and an intelligent control module, and is used for regulating the operation of the system in real time. The cooling liquid pump extracts the cooling liquid from the liquid storage tank, the cooling liquid flows through the cooling plate to absorb heat of the battery module, then the cooling liquid enters the heat exchanger to release heat, and the cooling liquid flows back to the liquid storage tank to form circulation. In the prior art, the double-path liquid cooling energy storage system cannot be effectively simulated and analyzed, the heat management design cannot be effectively optimized, the system performance is improved, and the use effect of the double-path liquid cooling energy storage system is poor. Disclosure of Invention The invention aims to provide a simulation analysis method of a double-path liquid cooling energy storage system, which can effectively simulate and analyze the double-path liquid cooling energy storage system, can effectively optimize the heat management design and improve the system performance, can improve the use effect of the double-path liquid cooling energy storage system, and solves the problems in the background art. In order to achieve the above purpose, the present invention provides the following technical solutions: The simulation analysis method of the double-path liquid cooling energy storage system comprises the following steps: Constructing a simulation analysis mathematical model of the double-path liquid cooling energy storage system, and deploying the simulation analysis mathematical model of the double-path liquid cooling energy storage system in an actual simulation analysis environment of the double-path liquid cooling energy storage system; Setting boundary conditions, collecting real-time data of the two-way liquid cooling energy storage system, and carrying out simulation on the real-time data of the two-way liquid cooling energy storage system according to a simulation analysis mathematical model of the two-way liquid cooling energy storage system to determine a simulation analysis result of the two-way liquid cooling energy storage system; And optimizing the design of the cooling plate, the flow channel layout or the flow of the cooling liquid according to the simulation analysis result of the two-way liquid cooling energy storage system, thereby optimizing the design of heat management. Preferably, a simulation analysis mathematical model of the two-way liquid cooling energy storage system is constructed, and the following operations are executed: Collecting historical data of the two-way liquid cooling energy storage system, dividing the collected historical data of the two-way liquid cooling energy storage system, and dividing the historical data of the two-way liquid cooling energy storage system into a training set and a testing set; Based on a machine learning technology, training a machine learning model by adopting a training set, enabling the machine learning model to autonomously learn simulation analysis behaviors of the two-way liquid cooling energy storage system from the training set, automatically analyzing the flowing and temperature distribution situation of cooling liquid, and determining a simulation analysis mathematical model of the two-way liquid cooling energy storage system; Based on the test set, testing and verifying the simulation analysis mathematical model of the two-way liquid cooling energy storage system, evaluating the analysis performance of the simulation analysis mathematical model of the two-way liquid cooling energy storage system, and determining the test result of the mathematical model; And optimizing parameters of the simulation analysis mathematical model of the double-path liquid cooling energy storage system according to the mathematical model test result, and determining the optimal simulation analysis mathematical model of the double-path liquid cooling energy storage system. Preferably, the two-way liquid cooling energy storage system is subjected to simulation analysis, and the foll