急需建立新的电动汽车里程测试工况方法

Core Viewpoint - The article highlights the persistent issue of electric vehicles (EVs) having significantly lower driving ranges in winter compared to manufacturer specifications, despite improvements in lithium battery performance due to new technologies [1]. Group 1: Current Challenges - The inherent characteristic of EVs is that driving range decreases significantly in extreme temperatures, primarily due to energy consumption from heating in winter and cooling in summer [1]. - New technologies like heat pump air conditioning can alleviate energy consumption but do not fundamentally resolve the issue [1]. - The need for heating or cooling the battery system to enhance performance in extreme temperatures also consumes energy [1]. Group 2: Testing Methodology - Current testing methods for EV driving range, namely the China Light-Duty Vehicle Test Cycle (CLTC) and the Worldwide Harmonized Light Vehicles Test Procedure (WLTP), do not adequately account for temperature sensitivity, leading to discrepancies between expected and actual performance [2]. - The lack of an appropriate testing methodology results in manufacturers overstating driving ranges to meet consumer expectations, negatively impacting user experience [2]. - There is a call for establishing a new testing standard that incorporates environmental temperature effects, leveraging China's extensive EV market experience [2]. Group 3: Recommendations for Improvement - The article suggests that Chinese EV manufacturers should enhance technological innovation to improve vehicle performance in adverse weather conditions [4]. - Most Chinese brand EVs can meet claimed driving ranges under optimal conditions, but performance drops by 10-20% in slightly adverse conditions and by 30-40% in extreme temperatures [4]. - The goal is to reduce the driving range reduction to within 20% and to advance the technology to ensure EVs are not only usable but also user-friendly [4].