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CATL unveils dual-battery system to accelerate heavy-duty truck electrification

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CATL unveils dual-battery system to accelerate heavy-duty truck electrification

CATL (HKEX: 3750) has unveiled a dual-electric range extension battery for heavy-duty trucks, pairing a swappable main battery with an independent on-board battery as it expands its push in freight electrification.

The world's largest EV battery maker introduced the system in Beijing on Tuesday, alongside upgrades to its Qiji battery-swapping system aimed at reducing fleets' energy replenishment and battery costs.

The system consists of 2 independent battery systems: a standardized, chassis-mounted swappable main battery and a 77-kWh range-extension battery behind the cab. The latter supports 3C charging and provides backup power.

Drivers of conventional battery-swapping trucks typically return to swap stations with about 30% charge remaining to avoid running out of power en route, leaving part of their leased battery capacity unused, CATL said.

With the backup battery, the system can increase the main battery's depth of discharge (DOD) from about 70% to more than 95%, allowing trucks to return to a swap station with less than 5% charge remaining in the main battery.

The system can switch power delivery to the range-extension battery within milliseconds, maintaining uninterrupted power and providing redundancy under demanding operating conditions, the company said.

It uses what CATL calls a "1+X" architecture. The main battery remains standardized for compatibility with the Qiji swapping network, while the range-extension battery can be tailored to requirements such as low-temperature performance, high energy density or high power.

The 2 battery systems can be upgraded independently. The range-extension battery stays with the vehicle as an on-board asset, while the main battery can be leased flexibly according to seasonal freight demand, helping fleets reduce rental expenses during idle periods.


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