Documents filed by GM and Hyundai with the US safety
regulator show how the two automakers separately identified the same cause of
battery fires in their newest electric vehicles, tracing them to similar
manufacturing defects in battery cells made at at least two plants operated by
a unit of LG Chem.
"Together with our client and partners, LG is actively
working to ensure that the recall measures are carried out smoothly," an
LG spokesperson said on Friday. "The reserves and ratio of cost to the
recall will be decided depending on the result of the joint investigation
looking into the root cause, currently being held by GM, LG Electronics and LG
Energy Solution."
GM and Hyundai linked the fires to lithium-ion battery cells
supplied by LG Energy Solution, an LG Chem subsidiary and one of the world's
largest battery manufacturers. The cells were produced at LG plants in South
Korea and China.
In Korea, the decline in LG Chem shares reflected investors'
concerns about the multibillion-dollar cost of recalling the defective
batteries and how that might affect the company's relationships with GM,
Hyundai and others.
LG provides similar EV battery cells to several vehicle
manufacturers, including Ford Motor and Volkswagen. Ford and VW have not
reported similar issues with the LG cells.
GM last week told the National Highway Traffic Safety
Administration that experts from LG and GM on July 21 identified “two rare
manufacturing defects in the same battery cell” as the root cause of the
battery fires in the Chevrolet Bolt EV.
GM identified the defects as a torn anode tab and a folded
separator, and said the defective cells were produced at LG's plant in Ochang,
Korea.
After the tenth Bolt fire, in Chandler, Arizona, GM said it
had uncovered manufacturing defects in some cells "produced at LG
manufacturing facilities beyond the Ochang plant."
GM last week widened its recall of the Bolt to more than
140,000 vehicles to replace battery packs, at a cost now estimated at $1.8
billion. The automaker said it would seek reimbursement from LG - GM's partner
in the Ultium LLC battery joint venture in the United States.
In a statement on Friday, LG said its share of the recall
cost “will be decided depending on the result of the joint investigation
looking into the root cause."
Hyundai said its investigators determined that a battery
fire in a Kona EV - one of more than 15 such incidents in Korea, Europe and
Canada - was caused by an internal short circuit in a battery cell. Hyundai
traced the issue to a “folded anode tab.”
South Korea's transport ministry said in February that it
would recall Kona EVs with battery cells manufactured at LG's China factory.
Hyundai said it would spend nearly $900 million to replace
LG batteries in some 82,000 EVs worldwide, including more than 75,000 Kona EVs.
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