"A new report from Croatia said that the LGES packs made in China may not be up to the mark compared to those made in Europe or the U.S. Zagreb-based repair and R&D shop EV Clinic said in a recent post on X that LGES' nickel-manganese-cobalt batteries (NCM811) installed in the Tesla Model Y and Model 3 made in China have extremely high failure rates and degrade faster than the nickel-cobalt-aluminum (NCA) batteries made by Panasonic in the U.S."
"The firm added that in more than 90% of the Tesla battery repair cases it receives, cell-level fixes are simply impossible on the LGES packs. The issues stem from high internal resistance in the cellsif the resistance exceeds acceptable levels, the cells can heat up more, deliver less power, reduce range and become unstable. A low-resistance cell is generally healthy and efficient."
LG Energy Solution NCM811 battery packs manufactured in China show much higher failure rates and faster cell-level degradation than Panasonic NCA packs made in the U.S. Repair shop diagnostics indicate more than 90% of LGES pack failures are not repairable at the cell level. Many cells from the Nanjing factory exhibit internal resistance above 100 milliohms, causing excessive heat, diminished power output, reduced range and potential instability. Repairs often cost thousands of dollars, and full cell swaps are considerably more expensive. Tesla sources high-voltage battery packs from multiple suppliers and regions, producing variability in long-term pack performance.
Read at insideevs.com
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