Electric vehicle battery pack thermal management control simulation method combined with numerical calculation
A numerical calculation and management control technology, applied in design optimization/simulation, calculation, electrical digital data processing, etc., can solve the problem that a single mass point cannot well meet the simulation needs of power battery pack temperature control, and achieve easy implementation, Simple and convenient operation, wide adaptability
Active Publication Date: 2021-08-27
XIANGTAN UNIV
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Problems solved by technology
[0003] However, for power battery packs, the temperature values at various locations during the working process are often not consistent, and people are also concerned about the uniformity of temperature distribution throughout the battery pack. Therefore, in the simulation modeling of known control algorithms, the simplification of a single particle This method cannot well meet the simulation needs of power battery pack temperature control
In real time, due to the complexity of the heat dissipation process of the power battery pack, it is difficult to accurately predict the influence of control input parameters on output objects by simply solving the transfer function
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[0040] Such as figure 1 As shown, the cells of a battery pack of a miniature pure electric vehicle are composed of 1 parallel and 21 strings. The rated voltage of the battery pack is 80V. The thermal management of the battery pack is carried out by liquid cooling, and the cooling liquid is ethylene glycol aqueous solution. figure 1 Express the structural composition of the battery pack and its thermal management system in a cross-sectional view, figure 1 The number of battery cells (1) is 21, and the temperature acquisition module (5) is provided with 3 different measurement points. The simulation method of thermal management control of electric vehicle battery pack combined with numerical calculation can be found in the attached figure 2 . In this embodiment, the control simulation is implemented based on the development of computational fluid dynamics software Fluent and its UDF (user define function, user-defined function) tool. Specifically, the transient calculation p...
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The invention discloses an electric vehicle battery pack thermal management control simulation method combined with numerical calculation. The simulation method comprises the steps of formulating a control strategy of the power battery pack, establishing a conjugate heat transfer transient numerical calculation model of the power battery pack and giving initial conditions of the model; and determining the time step length and the time step number of the transient numerical calculation model, executing numerical calculation, analyzing a numerical calculation result, and evaluating the control effect of a PID feedback control algorithm. The simulation method provided by the invention is scientific and reasonable, simple and convenient to operate, wide in adaptability and easy to implement, and temperature values at multiple positions of the power battery pack can be obtained by means of numerical calculation to evaluate a control algorithm.
Description
technical field [0001] The invention relates to the field of electric vehicles, in particular to a simulation method for thermal management control of electric vehicle battery packs combined with numerical calculation. Background technique [0002] Electric vehicles have outstanding advantages such as green environmental protection, comfort and energy saving, and are an important field of current economic and social development. At present, electric vehicles are mostly powered by lithium-ion power battery packs. Lithium-ion batteries have unavoidable heat generation during the working process and cause the temperature of the battery pack to rise. Due to the problems of poor safety performance and easy damage of lithium-ion batteries at high temperatures, it is necessary to The temperature control of the battery pack is carried out. The mainstream temperature control method is to use a liquid cooling method to cool the battery pack through a heat exchanger, and the quality of...
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IPC IPC(8): G06F30/28G06F111/10G06F119/14G06F113/08
CPCG06F30/28G06F2111/10G06F2119/14G06F2113/08
Inventor 张翮辉常春平游浩林孟步敏刘金刚卢海山
Owner XIANGTAN UNIV