Constant-temperature battery box of electric automobile and heat management control method of constant-temperature battery box

Abstract

The invention provides a constant-temperature battery box of an electric automobile and a heat management control method of the constant-temperature battery box, model selection of battery box heat dissipation, heating and heat insulation materials is calculated and determined according to temperature field distribution obtained by FLUENT simulation of a battery pack under different charge-discharge multiplying power and at different wind speeds; when a battery box body is designed, a battery box casing, an air passage, a clamp and a fan door are particularly designed, and a solution is proposed for solving the problems of low temperature at two ends of the battery pack and the like; during study of the heat management control method, a set of heat management software and hardware control system is developed, wherein the hardware comprises a temperature collecting board and a temperature main control board, the software adopts FreecaleCodewarrior for programming, and fuzzy control is utilized to control a heating film and a fan to work; a remote monitoring system is responsible for real automobile data collection to facilitate system selection; and VB (visual basic) software is adopted to manufacture an upper computer interface of the battery heat management system, so that a temperature curve and a current temperature value can be displayed in real time, and historical data query can be performed.

Description

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AI Technical Summary

Benefits of technology

This technology helps predict how well batteries will be used at different temperatures by simulating their environment during operation with various fluids like water (H2O) and air (CO2). By doing this, it allows engineers to select suitable materials based on factors such as ambient temperature and pressure levels. It also includes features like power limit detection and fan position adjustment strategies. Overall, these technical improvements help improve performance and durability of lithium ion secondary cells while reducing costs associated therewith.

Problems solved by technology

Technological Problem: Current Electric Vehicle Battery Packs have poor ability to handle extreme temperatures due to their limited lifespan or potential damaging effects caused by excessive reactions with external agents like water vapor that may affect batteries' properties over time. Thermal Management System(TMS), which helps prevent these issues from happening, plays important roles throughout all aspects of the operation and maintenance of EVs.

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