General Motors will enhance the structure of its Chevrolet Volt extended-range electric vehicle to reduce the risk of a post-crash fire involving the car’s battery pack, but plans to stick with its current battery chemistry and cooling-system design. The auto maker also will maintain its fire-prevention protocol of sending engineering teams out to de-power Volt battery packs involved in serious crashes, WardsAuto learns. In addition, GM expects to unveil later this year a tool to ...

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