Abstract:

At present, the automobile has become an indispensable transportation tool of work and life. At the same time the automobile also becomes the main source of environmental pollution. To save the energy, reduce the environmental pollution and realize sustainable development, the research of new energy vehicles has become the main trend and a basic policy of world's automobile production and usage. Temperature control of power battery is one of the key technologies of electric vehicle. The temperature control technology and thermal properties of PCM used in lithium batteries have been studied by scholars to solve the temperature instability and improve the safety performance of lithium batteries in new energy vehicles. By adding compounds such as metal, graphite and cellulose, the heat transfer performance of the battery had been improved. The mathematical equation of heat conduction established by computer simulation provides a theoretical basis for the application of PCM in lithium battery. In addition, the applications of PCM in energy recovery of vehicle exhaust and indoor temperature control are the research direction of vehicle energy saving. These process of indoor temperature control by PCM can be active or passive. This not only reduces the pollution during automobile operation, but also saves energy and enhances the safety of automobiles. Meanwhile, it keeps the temperature constant during the process of move and stop, and then the passengers will be more comfortable.

摘要：

目前，汽车已经成为人们工作和生活不可缺少的交通工具，与此同时汽车也成为环境污染的重点源头，为了节约能源，减少环境污染，实现人类社会的可持续发展，发展新能源汽车已成为世界各国的汽车生产和使用的主要趋势和基本政策。动力电池的温度控制是电动汽车的关键技术，为了解决锂电池的温度不稳定问题，提高新能源汽车锂电池的安全性能，许多学者研究了PCM应用于锂电池控温技术和热性能，并且通过加入金属、石墨、纤维素等化合物以改善电池传热性能，还用计算机模拟的方法，建立起热传导的数学方程式，为PCM在锂电池的应用提供理论依据。此外，将PCM应用于汽车尾气排放过程中的能源回收和汽车室内温度调节过程也是汽车节能的研究方向，这些过程可以采用主动式或者被动式的控温和制冷。不仅可以减少汽车运行过程中对环境的污染，节约能源，提高汽车的安全性，而且还能保持汽车在运行和停止过程中室内的温度恒定，提高车乘人员的舒适程度，有利于车乘人员的身心健康。