Finite element method-based storage battery thermal management analysis and optimization method

Abstract

The invention discloses a finite element method-based storage battery thermal management analysis and optimization method. The finite element method-based storage battery thermal management analysis and optimization method comprises the following steps of: acquiring parameters of a plurality of batteries and a battery pack respectively and establishing three-dimensional models of the plurality of batteries and the battery pack; performing the meshing of a definite element on the three-dimensional models of the plurality of batteries and then performing thermal field analysis after the meshing to acquire temperature field analytical results of the plurality of batteries; performing fluid mechanics meshing on the three-dimensional models of fluid in the battery pack and then after the meshing, using temperature field analytical results of the plurality of batteries as constraint conditions of the plurality of batteries in the fluid grid models in the battery pack; performing fluid mechanics calculation on the constrained grid models to acquire flow field analytical results of the storage batteries; judging whether the flow field analytical results accord with preset conditions or not; and if the flow field analytical results do not accord with the preset conditions, optimizing the design scheme of the battery pack and establishing the models again. The finite element method-based storage battery thermal management analysis and optimization method is not limited to mathematic analysis capacity, has higher adaptability and solving capacity, does not need entity models, is economic and quick in the analytical process, and has higher degree of freedom and flexibility.

Description

technical field [0001] The present application relates to the field of battery technology, in particular to an analysis and optimization method for battery thermal management based on the finite element method. Background technique [0002] Electric vehicles refer to vehicle-mounted power supplies as power and motors to drive the wheels. Because they cause less environmental pollution than traditional vehicles, their prospects are widely optimistic. The on-board power supply is usually a battery, and for a pure electric vehicle, the battery is the only power source to provide it with all the capabilities required for operation, so how to reasonably design the battery has become the focus of the electric vehicle development process. [0003] The storage battery is usually a group of batteries packaged with the same kind of batteries (such as lithium batteries) in a battery pack. The consistency of multiple batteries packaged in the battery pack needs to be ensured, otherwise ...

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Problems solved by technology

[0005] 1. For theoretical research, ordinary calculations are only suitable for linear and simple geometric shape problems, and are greatly limited by the level of mathematical analysis and solution capabilities, and cannot obtain accurate calculation results;

[0006] 2. Although experimental research can obtain accurate calculation results, the premise is that a solid model needs to be manufactured, which is costly, time-consuming, and less flexible

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