Humanoid robots in battery production at CATL

Automation Humanoid Robots in Battery Production at CATL

2025-12-19 From Thomas Günnel | Translated by AI 2 min Reading Time

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Humanoid robots are replacing humans on a production line for drive batteries at CATL. The precision surpasses expectations—the cycle times match those of experienced workers.

The humanoid "Xiao Mo" replaces humans in battery production at CATL.(Image: CATL) — The humanoid "Xiao Mo" replaces humans in battery production at CATL.
(Image: CATL)

The battery manufacturer CATL uses humanoid robots in battery production. They replace human workers in several critical processes, reports the news site Cnevpost. Accordingly, CATL deploys "Xiao Mo" at the company's production facility in Luoyang, Henan. According to the company, it is "the world's first large-scale use of humanoid robots in battery production."

The humanoid performs complex tasks, including plugging in battery connectors. Xiao Mo also replaces human operators in end-of-line processes and measuring direct current internal resistance during battery production. Both processes are the final functional tests before the batteries leave the production line.

These tasks were previously carried out by humans. They had to connect test plugs with high-voltage power to the batteries, posing a risk of high-voltage flashovers. Additionally, according to CATL, the efficiency and quality of the work fluctuated.

This Technology is Inside Xiao Mo

According to CATL, the humanoid robot features a comprehensive "Vision-Language-Action Model." These models integrate image processing, language, and actions, enabling Xiao Mo to perceive its environment and perform tasks. This means the humanoid robot independently manages material position deviations and variations in connection points, adjusting its work in real time.

When inserting or removing flexible wiring harnesses, Xiao Mo dynamically modulates the force, according to Cnevpost, to ensure reliable connections without damaging components. The robot detects the connection status of the wiring harnesses and reports anomalies in real time.

According to CATL, the humanoid achieves a connection success rate of over 99 percent in real-world operations. The cycle times are comparable to those of human specialists.

Higher Work Performance—Consistent Quality

"Given the continuous production tasks for multiple battery models, the daily workload has tripled compared to manual labor, while maintaining exceptional consistency and stability," the news site quotes battery manufacturer CATL. During operational pauses, the humanoid can actively switch to inspection mode.

The humanoid robot was developed by "Spirit AI," a company based in Hangzhou, China. It was founded in 2024, and CATL supports the company.

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Date: 08.12.2025

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