BAK Battery Standardizes Robot Power with 21700 Cylindrical Cells

In 2026, the humanoid robot industry is making the critical leap from technology validation to real-world deployment. Driven by policy support, capital inflows, and rising market demand, power batteries—the “heart” of robots—have become a decisive factor in how quickly products land and how far their applications can reach.

Facing Pain Points: The Triple Challenge of Endurance, Power, and Safety

Industrial robots need long runtimes to support continuous operation; consumer robots need instantaneous high current to handle climbing and obstacle crossing; medical and care robots place extreme demands on safety. Confronted by fragmented scenario requirements, BAK Battery is pursuing “platformization to counter fragmentation.” Based on its mature 21700 cylindrical cell platform, the company combines standardized design with material-system innovation to achieve precise adaptation across full-domain scenarios.

Using the 21700 Platform as a Foundation: BAK Builds a Three-Dimensional Product Matrix

Facing a market reality of divergent application scenarios, BAK Battery has made the 21700 cylindrical cell its core robotic power platform and built a three-dimensional matrix—power, capacity, and safety—around a single form factor.

21700-65E

• 6500mAh ultra-large capacity

• 315Wh/kg high energy density

• Supports 4C discharge

• Internal resistance ≤8mΩ

• Wide operating temperature range from -30°C to 70°C

Application scenarios: home services, routine inspections, and other long-endurance applications, improving runtime by up to 30%.

21700-50D2

• All-tab and solid-state electrolyte coating technology

• Internal resistance ≤5mΩ

• Supports 60A continuous discharge

• Wide operating temperature range from -20°C to 80°C

Application scenarios: logistics delivery, climbing and load-bearing, and other instantaneous high-power applications.

21700-45M

• LMFP and high-nickel hybrid system

• Passes new national standard nail penetration, overcharge, and other stringent safety tests

Application scenarios: medical care and other safety-critical applications involving close human contact.

Full-Domain Adaptability of a Standardized Platform

With the unified 21700 size and interface, BAK Battery can flexibly deliver differentiated solutions for long endurance, high burst power, and high safety requirements. Whether for home services, logistics delivery, or medical care, the same platform enables rapid adaptation.

From the Present to the Future: Unlocking the Industry’s Full Potential

Over the next three to five years, cylindrical lithium batteries will remain the main force in large-scale robot commercialization, while hybrid solid-liquid cells will gradually penetrate high-end humanoid and special-use scenarios. BAK Battery is using its mature cylindrical platform to meet current market demand and developing solid-state battery technology to open the next generation of possibilities, helping the humanoid robot industry complete its transformation from technical demonstration to large-scale commercial deployment. The company maintains that “power defines boundaries” and is embedding itself deeply into the industrial chain as the industry moves from technology validation to ubiquitous intelligent applications.

Edit by paco

Last Update:2026-08-20 09:20:58