GM says defect-free Bolt batteries are in production

LG is once again making batteries for the Chevy Bolt, and General Motors says that it worked closely with the South Korean giant to make sure the new cells are free of defects that have led to at lest a dozen fires in the automaker’s electric vehicle and a massive recall. GM says it will start swapping the new batteries into Bolt EVs in October, though it did not say when it will restart production of brand new versions of the electric car.

Owners of older Bolts (model years 2017 to 2019) will have all the modules in their battery packs swapped for new ones. Owners of newer models may only get individual modules changed out, GM said.

GM said Monday that it will also have dealers start installing new diagnostic software on Bolts in the next 60 days. The software will continually scan the battery packs for signs of defects. If none are found, the software will eventually allow owners to once again charge their vehicles to 100 percent, and abandon some of the other safety guidelines GM has put in place while it worked out the recall.

The initial fix for the recall, announced in May, involved an earlier version of this diagnostic software, though at least two vehicles that received it still caught fire. GM did not go into much detail Monday about how this new software differs.

In the meantime, Bolt owners are supposed to continue adhering to that guidance. GM says owners should park outside and away from their homes after charging, and that they should not charge their vehicles indoors overnight. Owners should not charge their Bolts beyond 90 percent, and avoid depleting the battery below 70 miles of remaining range.

GM made one minor tweak to its guidance, though. As long as they follow the above guidelines, GM says owners need only leave “ample space” between their Bolt and other vehicles, instead 50 feet as it recently advised. It did not define “ample,” though.

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