CATL Says It Can Charge an EV Battery in Six Minutes. Nobody's Tested It Yet.
CATL says its new EV battery reaches a full charge in six minutes — but the more consequential claim is what it does at 22 below zero.
The number everyone is quoting from CATL's Super Technology Day last week is six minutes and 27 seconds — the time the company claims its third-generation Shenxing battery takes to charge from 10 to 98 percent. That number is real, plausible, and not the most interesting thing about this battery.
The more significant claim is buried in the same press release: at minus 30 degrees Celsius, the Shenxing 3 charges from 20 to 98 percent in about nine minutes. Nine minutes. At temperatures where most lithium-ion batteries either refuse to charge or charge so slowly that drivers have to wait in the cold for an hour. CATL says it solved that problem with pulse self-heating technology — no specialized charging infrastructure required.
Every other outlet covering this announcement led with the six-minute headline. They missed the part that matters most to anyone who has watched an EV struggle in a Minnesota winter.
Cold-climate charging failure is not a niche problem. It is one of the core reasons northern-tier US states, Canada, Scandinavia, and much of Russia have lagged on EV adoption even when range and price have become competitive. When the pack is cold, the battery management system throttles the charge rate to protect the cells — sometimes to near-zero. You end up with an electric car that either won't charge or charges so slowly you might as well have a gasoline engine. CATL's answer is a battery that heats itself rapidly using controlled current pulses before accepting a high charge rate. The company claims it works on any standard charging pile.
"We always deliver what we promise," CTO Gao Huan told reporters at the event, per CarNewsChina. CATL is the world's largest EV battery manufacturer, with roughly 48 percent global market share. When it makes a specific engineering claim, the number deserves attention. It does not yet deserve the benefit of the doubt.
The room-temperature numbers are consistent with what CATL announced, corroborated independently by Ars Technica, InsideEVs, and CleanTechnica. The 10-to-80-percent time of three minutes and 44 seconds is nearly five times faster than the 18-minute benchmark set by Hyundai and Porsche's 800-volt NCM packs. BYD, the closest competitor, announced its Blade Battery 2.0 in March with a 10-to-97-percent charge in nine minutes — CATL beat it by about three minutes at room temperature, per electrek.
The cold-weather result is where the gap between claim and competition widens. BYD says its Blade 2.0 needs 12 minutes for a 20-to-98-percent charge at the same temperature — minus 22 Fahrenheit, per the Ars Technica report. CATL's nine minutes would represent a meaningful practical advantage for drivers in cold climates — if the numbers hold.
The verification gap applies here with full force. Every figure cited above comes from CATL's own announcement. No independent laboratory has tested the Shenxing 3 in climate-controlled conditions. The pulse self-heating mechanism is plausible — it mirrors approaches documented in academic literature on low-temperature lithium-ion performance — but the specific CATL implementation has not been externally audited. What we have is a credible company's description of its own product.
There is also a larger infrastructure constraint worth naming. CATL claims the battery sustains a 10C peak charge rate, with a 15C maximum. Delivering 10C to a 60-kilowatt-hour pack requires roughly one megawatt of power delivery. The fastest public DC fast chargers currently operating deliver around 350 kilowatts. The math is not close. CATL demoed its own charging booths at the event and also showed a battery-swap system — an implicit acknowledgment that the existing charging network is not ready for a 10C world, even if this battery ships exactly as described.
After 1,000 fast-charge cycles, CATL says the Shenxing 3 retains more than 90 percent of its rated capacity. That is consistent with typical LFP longevity but unverified under real fast-charge conditions.
The CATL-BYD fast-charge race is real. LFP chemistry is crossing performance thresholds that were not achievable two years ago. The cold-climate unlock — if it holds — closes the last major geographic gap in EV adoption. Whether it holds is a question no journalist or independent researcher has answered yet.
The company says it always delivers what it promises. We'll find out.
