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央视网消息:2022年冬季奥运会将在中国举行,中国政府再次许下“绿色奥运”的承诺。围绕这一目标,实现奥运期间的绿色交通是重要环节。8月31日,北京理工大学等科研团队发布了一项成果:全气候电池产品研发成功,也就是在所有气候条件下,包括极端低温的情况下,电动车的电池还能正常工作。
严寒环境,电动车将面临挑战
经过调研,北京冬奥会期间,车辆将面临-20℃至-30℃的低温,使用新能源汽车面临着以下挑战↓↓
动力电池的充、放电特性变差!
电池容量和寿命也会衰减!
这些将导致车辆续驶里程及整车动力性能显著下降!
北京理工大学电动车辆国家工程实验室主任、北京市新能源汽车联席会专家组首席专家 孙逢春:
现在电动汽车(续航里程)已经到了300公里以上没有问题,但在零下10℃的环境下可能就只能跑几十公里。北京冬奥会两个场馆之间最远的,也就是北京的五棵松到张家口的崇礼距离是260公里,电动车在低温下如何续航是必须解决的问题。
新技术,让电动车突破低温禁区
利用金属在电池内部加热会产生快速导热性,孙逢春教授领导的团队研发出了世界上第一个全气候电池产品。关键技术如下↓↓
在现有的锂电池中加入了一层金属镍铂片
连通电源,就可以使电池迅速加热!
孙逢春:
在零下30℃的时候,我们电池的温度二十几秒就提升到零度以上了,这样就可以非常好地工作,而且对电池的寿命没有丝毫影响,这是核心技术所在。也就是说电动车再没有禁区了,在这个方面是一个具有里程碑意义的原理和技术。
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