Xpeng has shifted its battery strategy for the Iron humanoid robot, opting for high-energy solid-liquid hybrid batteries instead of the previously announced all-solid-state cells. This move comes as all-solid-state battery technology remains in the laboratory stage, prompting Xpeng to prioritize commercial readiness for Iron’s planned mass production by the end of 2026.
Xpeng Iron Adopts Semi-Solid Battery Solution
Xpeng will equip its Iron humanoid robot with high-energy solid-liquid hybrid batteries, marking a change from its earlier plan to use all-solid-state batteries. The decision is aimed at reducing supply risks and ensuring Iron can enter mass production as scheduled.
The company has selected a second-tier Chinese battery manufacturer as its primary supplier for these batteries, while continuing to test samples from other companies. Xpeng has not publicly disclosed this change in battery strategy.
Background: Shift from All-Solid-State Batteries
At its AI Day in November 2025, Xpeng announced that Iron would use all-solid-state batteries to reduce weight and improve energy density and safety. Xpeng chairman and CEO He Xiaopeng said at the time that humanoid robots could be among the first products to drive the mass production and commercialization of all-solid-state batteries.
However, the industrialization of all-solid-state batteries has not kept pace with Iron’s production schedule. Xpeng previously sought all-solid-state battery products from BYD, Gotion High-tech, CALB, and Eve Energy, but none met the installation requirements.
Technical Details of the Semi-Solid Batteries
The batteries selected for Iron are high-energy solid-liquid hybrid cells, not conventional liquid batteries containing only a small amount of solid electrolyte. The solution uses pouch cells instead of the cylindrical cells more commonly found in robots.
These pouch cells offer higher energy density and improved safety compared with conventional alternatives. However, high-energy solid-liquid hybrid batteries remain at an early stage of industrialization and require further validation in areas such as material systems, manufacturing processes, and product consistency.
Industry Context and Production Timeline
All-solid-state batteries remain largely at the laboratory validation stage, facing challenges involving costs, performance stability, and manufacturing consistency. CATL chairman Robin Zeng stated in June that current solid-state battery technology is only at level 4 on a scale of 1 to 9, with level 9 indicating readiness for mass production.
Xpeng still plans to begin mass production of Iron by the end of 2026, with the robot set to officially go on sale in 2027. Initial deployment will focus on Xpeng’s stores and industrial parks, with potential expansion depending on demand.
Why this matters
Xpeng’s decision to use semi-solid batteries for Iron highlights the challenges in bringing all-solid-state battery technology to market. By opting for a solution closer to commercial viability, Xpeng aims to keep its production timeline on track while still leveraging advanced battery technology.
The move also underscores the unique requirements of robotics applications, which prioritize weight, energy density, and safety over cost. Robots may serve as an early testing ground for next-generation batteries, even if they do not drive large-scale demand for manufacturers.
What this means for buyers
Buyers interested in the Xpeng Iron robot should be aware that it will launch with semi-solid battery technology rather than all-solid-state cells. This approach is intended to balance performance and production readiness, but the technology remains at an early stage of industrialization.
Potential customers should monitor further updates from Xpeng regarding battery validation and long-term support as the company continues to refine its approach ahead of Iron’s 2027 sales launch.
Key Specs
- Battery Type: High-energy solid-liquid hybrid (semi-solid) pouch cells
- Primary Battery Supplier: Second-tier Chinese battery manufacturer (undisclosed)
- Production Start: End of 2026
- Sales Launch: 2027
- Original Battery Plan: All-solid-state batteries (announced November 2025)
- Current Status of All-Solid-State Tech: Laboratory validation stage, not ready for mass production
- Dogotix Recent Funding: Over $900M (~AUD 1.3B) at a post-money valuation of $6.3B (~AUD 8.8B)
Source
Images sourced from: electrek.co, cnevpost.com, parametric-architecture.com, businessinsider.com
