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Composite Heterogeneous Energy Storage System

This system combines power and energy-optimized battery cells to provide 50% more EV range than a traditional battery of the equivalent spec

Published: 24th February 2022
Composite Heterogeneous Energy Storage System
Source: Sergii Chernov,,


Battery systems for electric vehicles (EV) and other applications can be improved by combining power optimized cells and energy optimized cells, rather than compromising with a single chemistry to meet both the power and energy demands of the application. However, in most cases, single chemistry solutions are used due to the complexity of combining cells of different voltages and current limits. Hence, there is a need for an energy storage system architecture that achieves the benefits of combining different battery chemistries, without the additional cost and complexity of previously proposed methods.

Technology Overview

CU Boulder researchers have developed a new energy storage system architecture that realizes the full capabilities of heterogeneous energy and power-optimized cells without the loss, complexity and cost associated with power conversion or power management functions. This innovative architecture named Composite Heterogeneous Energy Storage System (CHESS) uses capacitors in addition to different types of battery cells to achieve 50% longer EV range for equal weight, volume, life and cost compared to commercial state-of-the-art EV battery systems.

Further Details:

  • “Heterogeneous energy storage system and method of controlling a heterogeneous energy storage system.” Dragan Maksimovic, Khurra K. Afridi, Regan A. Zane, Gregory L. Plett, Michael S. Trimboli. August 31, 2017.

Stage of Development

Technology Readiness Level (TRL): 3.


  • 50% increased EV range for equivalent battery weight, size and cost
  • 40% decreased weight for equivalent battery range
  • More efficient battery performance


  • Electric vehicle batteries
  • Residential and commercial energy storage


Available for exclusive or non-exclusive licensing

  • PCT/US2017/019306
IP Status
  • Patent application submitted
  • Licensing