福特PHEV事件召回更新-电子发烧友网

引言

在BMW更新了PHEV召回原因以后，福特也进一步在之前充电模块损坏的说法之后更新了说法，直接定位到电池的问题。福特的说法是这样的：We have identified that cell contamination in the drive battery system was the cause of the issue that a small number of Kuga PHEV vehicles experienced.

定位原因

1）定位原因和处理措施根据这一次官方的说法，这就是直接把问题归咎到电芯生产工艺，也就是归因到了SDI的一段时期的电芯生产上。而且最好的解决方案就是进行直接替换，这个工作等于把所有的电池系统进行替换 Given the potential serious consequences that could arise from this we have decided to install a new drive battery pack to your vehicle. we anticipate being able to commence work in late December and will continue until all work has been completed, which likely will take until March.

2）带来的损失目前看来，福特一方面要提供维修旗舰的替代车型，一方面要提供500欧元左右的油卡。We will minimise the inconvenience to our customers by arranging to pick up and deliver their affected vehicles from their home or place of work and will provide them with a courtesy car whilst their vehicle is being updated should our customers so require As a goodwill gesture to acknowledge the inconvenience caused to our affected customers and loss of the fuel economy benefit they were expecting from their vehicle, they will shortly receive the complementary fuel card as previously communicated 按照这样的估计，给客户的500欧，给经销商估计也要对应300-500欧的费用，加上整个包按照14kWh，按照200欧元/kwh来计算，这个费用可能要超过3000欧元。总的损失为1.08亿欧元，好在PHEV的电池系统总归成本还是在可控范围内。

PHEV电池的问题

从目前来看，PHEV电芯出这种问题，归因于制造层面的问题是相对可以理解的。随着电芯能量密度的提升，电芯成本的下降，电池的安全边际是逐步下降的。PHEV模组设计中，是完全不做热失控防护的，原有的设计逻辑是PHEV电池不会烧毁，是建立在25Ah、37Ah和51Ah的电芯能够做到电芯本身能过穿刺，电芯具备相当强的鲁棒性。如近期NHTSA也开始对通用的77842台Bolt BEV进行调查，因为达到一定量之后，偶发的起火事故会带来很大的抱怨和投诉。

我个人理解，在海外事故率相对比较低的原因是迭代速度没有国内这么快，一年需要更新一种设计，而积累数量久了，如果整包没有有效的热失控防护措施，电芯制造出问题或者使用久了出问题，引发的起火事故也会逐步在后期上升。这个目前是在欧美市场逐步上量能直接面对的问题，从2021年开始海外市场从NCM622逐步切换到NCM811的电池会多起来。