General Motors said on Friday that it was expanding its recall of Chevrolet Bolt electric cars that have been found to be at risk of overheating and catching fire as a result of manufacturing defects.
The company said it was recalling Bolts from the 2020 through 2022 model years and a few 2019 Bolts that were not covered under a previous recall. The move means all 141,000 Bolts that G.M. has produced — going back to the 2017 model — are under recall.
...G.M. said the move announced on Friday would cost the company $1 billion on top of the $800 million it had allocated for previous Bolt recalls. It also said it would seek reimbursement from its battery supplier, LG Chem.
...G.M. and LG Chem have linked the fires to two manufacturing defects that occur on rare occasions. The companies have found that a short-circuit can occur if an anode tab is torn in manufacturing and if a separator between battery cells becomes folded. Under the recall, G.M. plans to replace the defective battery modules.
The videos of the fires are pretty dramatic, as one would expect. I imagine this is the sort of problem you expect at the beginning of a new technology - will be interesting to see how engineers and scientists solve this problem.