Recently, Chinese lithium battery manufacturer BAK Power, in collaboration with Echion Technologies, has co-developed and plans to launch an all-new ultra-high-power (UHP), long-life 2170 cylindrical cell. This product is purpose-built for battery backup units (BBU) in AI data centers and other critical power applications.

The cell leverages BAK’s proven tabless high-power cell architecture and incorporates Echion Technologies’ XNO® anode technology. As a result, it achieves 10C+ symmetric charge/discharge capability, delivering an order-of-magnitude improvement in cycle life over existing UHP cells, together with low internal resistance, high thermal stability and high safety. BBU trial samples are expected to be available by the end of 2026.

This new product is designed to close the performance gap that current UHP 2170 cells face in next-generation, high-power-density, liquid-cooled BBU side-mounted architectures, particularly in ±400V module designs. Key advantages include:

A more symmetric design

For BBU applications, today’s high-power 2170 cells exhibit excellent discharge capability but their limited charge rates force system over-design. The continuous charge/discharge capability of our new 10C+ cell effectively resolves this issue, reduces over-design and maximizes usable rack space.

An order-of-magnitude increase in cycle life,  delivering industry-leading levelized cost of storage (LCOS)

The product is engineered to withstand the frequent fast charge/discharge duty cycles typical of AI BBU operation, offering significantly longer asset life compared with conventional NMC UHP 2170 cells.

Higher intrinsic safety (safe by design)

Compared with the standard graphite-based UHP cell baseline, the new cell performs better in abuse tests. Leveraging the inherent safety characteristics of the XNO® chemistry, it meets the stringent safety requirements of BBU systems deployed in server-adjacent environments.

Engineered for data center thermal environments

Thanks to a low-resistance cell design combined with the thermal stability of XNO®, full performance can be sustained under the elevated ambient and rack-side temperatures typical of AI-driven high-density data centers. In these same environments, existing UHP 2170 chemistries commonly experience performance derating or premature aging.

Workloads are reshaping the power architecture inside data centers, and existing UHP cell chemistries can no longer keep pace. By optimizing cell materials, upgrading our tabless manufacturing process, and applying Echion’s XNO® anode technology, we have built a high-power cell that directly addresses this challenge. That is the motivation behind BAK Power’s launch of this project.

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