cwerdna wrote: ↑
Sun Feb 14, 2021 9:22 pm
SageBrush wrote: ↑
Sun Feb 14, 2021 7:59 am
The Bolt case may also be the Hyundai case, since they share the same battery/pack.
Last week Hyundai pointed a finger at the electrode separator as the root cause but LG disagrees.
The idea of the separator being the problem has to do with its failure to prevent dendrite penetration (and thus a short.)
May be true, but those sound like some serious dendrites.
No. I've never heard of Bolt and Hyundai Kona Electric sharing the same pack.
Seems unlikely given that https://media.chevrolet.com/media/us/en ... .tab1.html
says there are 288 cells whereas https://electricrevs.com/2018/12/20/exc ... nt-design/
says 294 for Kona EV.
There's a pic that says:
This image shows the type of LG pouch cell used in the Chevrolet Bolt EV. It is about 4 inches high, 13 inches long, and 0.6 inches thick and weighs about 1.8 pounds. The Hyundai Kona Electric, Kia Niro EV, Jaguar I-PACE, and Audi e-tron use cells with a roughly similar shape, size, and energy capacity.
A common thread is LG Chem.
Besides GM claiming that Bolt uses different separators than Kona Electric (https://insideevs.com/news/489753/chevy ... tors-kona/
), https://insideevs.com/news/490950/lg-en ... ona-fires/
came out which also has a pointer to https://www.hyundai.com/content/hyundai ... tation.pdf
To quote IEVs which quoted LG Energy Solution:
https://www.hyundai.com/content/hyundai ... tation.pdf
“LG Energy Solution’s Statement on Kona EV Recall:
In connection with the additional implementation of the recent voluntary Kona EV recall, the investigation has not yet been completed. However, we will continue to work closely with the Ministry of Land, Infrastructure, and Transport of the Republic of Korea and Hyundai Motors to ensure the recall is carried out smoothly with our highest priority on consumers’ safety.
The misalignment inside the battery cell (the folded anode tab) is cited as the reason for this recall, but it is hard to consider this as a direct cause since no fire occurred in the reproduction experiment as announced by the Ministry of Land, Infrastructure, and Transport. Moreover, this problem was discovered in the early production stages of LG Energy Solution Nanjing plant’s Hyundai Motors-only production line, which has already been corrected.
In addition, it has been confirmed that Hyundai Motors’ misapplication of the BMS charging map was caused by their incorrect application of fast charging logic, proposed by LG Energy Solution, to the BMS. We will be cooperating with the relevant authorities to discover whether this had any connection to the fire.
LG Energy Solution is fully committed to further enhancing the safety in all processes, from product design to manufacturing and inspection.
Furthermore, the damage to the separator, which was proposed as a possible cause of the fire last October, has since been confirmed as unrelated by simulation test conducted by a joint investigation team.”
"Replacement of all BSA(Battery System Assembly) of subject vehicles due todefective manufacturing in some of the battery cells produced by LGES at its Nanjing, China
Bolt recall 20V701000 per https://static.nhtsa.gov/odi/rcl/2020/R ... 1-2489.pdf
and many many other places like https://my.chevrolet.com/how-to-support ... ltevrecall
involves batteries produced in Ochang, South Korea.