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Thermal analysis and management of lithium-titanate batteries

机译:钛酸锂电池的热分析和管理

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摘要

Battery electric vehicles and hybrid electric vehicles demand batteries that can store large amounts of energy in addition to accommodating large charge and discharge currents without compromising battery life. Lithium-titanate batteries have recently become an attractive option for this application. High current thresholds allow these cells to be charged quickly as well as supply the power needed to drive such vehicles. These large currents generate substantial amounts of waste heat due to loss mechanisms arising from the cell's internal chemistry and ohmic resistance. During normal vehicle operation, an active cooling system must be implemented to maintain a safe cell temperature and improve battery performance and life. This paper outlines a method to conduct thermal analysis of lithium-titanate cells under laboratory conditions. Thermochromic liquid crystals were implemented to instantaneously measure the entire surface temperature field of the cell. The resulting temperature measurements were used to evaluate the effectiveness of an active cooling system developed and tested in our laboratory for the thermal management of lithium-titanate cells.
机译:电池电动汽车和混合动力汽车需要电池,除了能够容纳大量的充电和放电电流外,还需要存储大量的能量,同时又不影响电池寿命。钛酸锂电池最近已成为该应用的一种有吸引力的选择。高电流阈值使这些电池能够快速充电,并提供驱动此类车辆所需的功率。由于电池内部化学和欧姆电阻引起的损耗机制,这些大电流会产生大量的废热。在正常车辆操作期间,必须实施主动冷却系统以维持安全的电池温度并改善电池性能和寿命。本文概述了一种在实验室条件下对钛酸锂电池进行热分析的方法。实施热致变色液晶以瞬时测量液晶盒的整个表面温度场。所得的温度测量值用于评估在我们的实验室中开发和测试的主动冷却系统对钛酸锂电池的热管理的有效性。

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