BMW X1 PHEV电芯的升级

Release time：2019-03-29
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source：汽车电子设计
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在日内瓦车展上，宝马基本把原有的9.2kWh的电池组升级为12kWh的电池，并在SUV上加速部署PHEV；原有7.6kWh的升级为9.8kWh左右。但是在国内的X1 PHEV却一下子提升到了24kWh，这个事情有点特殊我们来仔细看一下。

 

BMW X1 PHEV电芯的升级

 

目前BMW的PHEV电池系统主要是从SDI和CATL两家来供：

 

SDI：之前是供应PHEV1的26Ah电芯，最近全部切换成34Ah

 

BMW X1 PHEV电芯的升级

 

CATL：

提供PHEV1的26.5Ah，目前提升到了43.5Ah；

提供PHEV2的37Ah，可能未来也需要提升

BMW在国内的电池系统设计是比较激进的，设计上是很大胆地

根据最新的电池包电芯数量不变，重量仅增加2.5公斤，可以评估除整体的重量现在是171.5kg，能量密度接近140Wh/kg

 

BMW X1 PHEV电芯的升级

 

增加的重量几乎全部来自于电池包内部提升安全性而新增的阻燃材料，从这个意义上来看，电芯的质量（108kg）增加是有限的，如果预估重量相似的话，电芯能量密度为220Wh/kg

备注：这个重量的升级情况，可能有一些差异，主要来自系统层面的减重和电芯的重量之间的差异，推算新电池的重量为115-120kg，能量密度在208-200Wh/kg之间

 

而2.5kg增加的阻燃材料的质量，根据尺寸来看面积为1.44个平方，应该在上面做了很多的防火材料的导入。

 

BMW X1 PHEV电芯的升级

 

小结：现在来看，BMW在国内的电芯更新速度要更快一些，也更激进。等到后续有这颗电芯的详细信息，我们再来看


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