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国内研发出目前能量密度最高的电池?看看业内人士的看法!

来源:宝鄂实业    2019-04-28 01:03    点击量:

【宁德时代开发出比能量304Wh/kg电池样品】日前,在国家重点专项支持下,宁德时代新能源科技股份有限公司研发团队攻克高镍三元材料及硅碳负极材料等关键核心技术,率先开发出比能量(质量能量密度)达304Wh/kg的电池样品,在这一国际竞赛中折桂。宁德时代摒弃了传统碳包覆技术,转向研究人造电解质界面膜包覆技术。历时2年多,将这一技术应用到硅材料制备,开发出具有自主知识产权的新型人造电解质界面膜包覆的硅碳复合负极材料,其循环性能表现显著优于国外产品。宁德时代首次将航空级别的“7系铝”运用至电池包下箱体。“7系铝”,铝中的“战斗铝”,常被用于制造飞机起落架,具备轻盈、坚固、安全等特性。“业内普遍认为这是‘7系铝’的技术难点,甚至是技术禁区。”吴凯说,为此,他们通过上百项的实验及相关工艺改善,使得应力腐蚀指数控制在行业内最高水平。目前,宁德时代已成功开发出“7系铝”下箱体,并已量产。至此,该企业电池包下箱体轻量化设计已处于世界领先水平。这一全新能量密度的动力电池,能使B级纯电动轿车电池仓在现有基础上,不额外增加空间,载能量(装载电池的总电量)即可提升约50%;车载动力电池系统能量提高50%;整车重量可在现有基础上减重250公斤,使该车型标准工况续驶里程提高到600公里以上……(科技日报)

 

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