Energy Storage System
Evaluation & Safety II

EssEs-II Mission

Enhance cell level understanding to support design and control of energy storage systems in applications.

Request an free EssEs-II site visit today.

What you gain with an EssEs-II Consortium membership

  • more than half a million battery test hours at a greatly reduced cost
  • Assessment of batteries on the market to help you make informed decisions for your products/applications
  • Freedom for your resources to dedicate to your product/application development
  • Cost sharing to a level equal to the number of participants
  • Calendar life, cycle life, safety and characterization data for three cell types per year
  • Proprietary data shared only among participants
  • Voting rights for selecting sets of battery cells to be tested
  • Voting rights to guide test modifications
  • One xEV disassembly per year
    • Guest speakers from supply chain
    • Large database with analytics
    • Two PAC meetings per year
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Request a free EssEs-II site visit today.

EssEs-II Goals

The EssEs-II mission will be accomplished by:

  • Developing precompetitive, detailed cell-level test data on currently available electrochemical storage systems across a diverse number of manufacturers and products
  • Performing research to advance the testing methodologies used to benchmark batteries, making tests faster, cheaper and more significant.


The program provides test data from member-selected sets of battery cells. The tests are selected based on their pre-competitiveness, applicability to application, and usefulness in comparing different technologies in the areas of:

Test data are provided in a private, independent, third-party laboratory format. All testing is conducted based on the recommended practices.


2013 EssEs PAC meeting

2013 EssEs PAC meeting attendees

The SwRI EssEs-II Consortium consists of commercial participants and will run for a period of four years with an annual renewal option. The consortium format allows for cost sharing to a level equal to the number of participants, with the benefit of proprietary data to be shared only among participants.

Deliverables and Pricing

Program deliverables include:

  • Semi-annual progress review meetings
  • FTP secure server database access to test data
  • Monthly progress reports
  • Annual reports
  • Full test results for each battery type per year

The consortium membership is $75,000 per year.

Request a free EssEs-II site visit today.

Related Terminology

energy storage system development  •  battery cells  •  greenhouse gas emission reduction  •  fuel economy improvements  •  hybrid electric vehicles  •  plug-in hybrid electric vehicles  •  electrochemical storage system research  •  batteries  •  lithium-ion

Benefiting government, industry and the public through innovative science and technology
Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 9 technical divisions.