CBAK Energy expands Nanjing battery cell capacity toward 18 GWh

CBAK Energy Technology (NASDAQ: CBAT) announced an expansion of production capacity for its Model 32140 full-tab cylindrical cells at its Nanjing Phase II facility in China, according to a company statement.

The Nanjing Phase II facility currently operates at 3 gigawatt-hours (GWh) of annual production capacity. The company's long-term plan calls for total annual capacity at the site to reach 18 GWh. The planned buildout spans approximately 2.9 million square feet of gross floor area across a site of about 58.8 acres.

As of Aug. 7, 2026, cumulative deliveries of the Model 32140 cell had reached 92 million units.

The facility uses fully automated core manufacturing processes, with automated guided vehicles handling material delivery throughout the production line. Winding equipment operates at up to 240 units per minute, while laser welding of current-collector disks reaches up to 120 units per minute per machine.

On the electrode side, dual-roll continuous calendering on the anode line is said to improve electrode thickness consistency by 30%. Bottom laser penetration welding increases the current-carrying area by approximately one-third, with an average cycle time of about 0.35 seconds per weld.

The facility employs a digital traceability system that assigns each cell a unique identifier linked to more than 100 tracked manufacturing parameters. An AI-enabled inspection system achieves a 100% detection rate for insufficient-fusion weld defects within its defined inspection scope, the company said.

"At Nanjing Phase II, process discipline, automation and manufacturing traceability operate as an integrated system," said Chenggang Yuan, Deputy General Manager of Nanjing CBAK New Energy Technology Co., Ltd. "As we execute the project's long-term plan toward 18 GWh of annual capacity, this platform is designed to help us scale Model 32140 production while maintaining the consistency, responsiveness and traceability required by customers."

CBAK Energy is based in Dalian, China, and operates subsidiaries in Dalian, Nanjing, Shaoxing, and Shangqiu.

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