General Motors will start making battery fixes to over 140,000 recalled Chevrolet Bolts EVs and EUVs beginning in mid-October.
The 2017-19 model year Bolt EVs will get five new battery modules, essentially getting an enhanced battery pack.
For the 2020-22 models, they will get all new modules too, unless GM can finish developing software that will allow it to identify whether they have defective modules that need replacing.
On Monday, GM's battery-maker LG Chem has restarted production at LG's plants in Holland, Michigan, and Hazel Park. They have been down since August, but GM spokesman Kevin Kelly did not know specific dates.
LG is also adding capacity to the plants so it can make more cells as needed by GM, Kelly said. As a result, replacement battery modules will begin shipping to dealers as soon as mid-October.
"We're grateful for the patience of owners and dealers as we work to advance solutions to this recall," said Doug Parks, GM executive vice president of Global Product Development, Purchasing and Supply Chain. "Resuming battery module production is a first step and we'll continue to work aggressively with LG to obtain additional battery supply."
GM's production of new Bolt EVs and EUVs at Orion Assembly plant has been halted since Aug. 23. It is scheduled to remain down through the week of Oct. 11, and Kelly said, "We'll continue to monitor the situation in terms of when we'll bring the plant back up."
In August, GM expanded its second recall on the Bolt to include 2017-22 model year Bolt EVs and the new EUV, an all-electric compact SUV.
On Monday GM and LG confirmed that the root cause of a battery fire is two manufacturing defects known as a torn anode and a folded separator, both of which need to be present in the same battery cell for a possible fire to occur. So far, GM confirms there have now been 13 Bolts that have caught fire while parked and three injuries. Eleven of those fires were in the U.S.
To assure Bolt owners of this fix, LG has implemented new manufacturing processes and has worked with GM to review and enhance its quality assurance programs. LG will institute these new processes in LG's South Korean facilities, which provide cells to GM, in the future.