Proposal Number:          21-1- S3.03-1126

          

          

   

Subtopic Title:
      Energy Storage for Extreme Environments

          

          

   

Proposal Title:
      Advanced Primary Cell Model

          

          

   

Firm:

          

Cornerstone Research Group, Inc.

          

   

Address:

          

510 Earl Boulevard, Miamisburg, OH 45342

          

   

Phone:

          

(937) 320-1877                                                                                                                                                                                

          

   

Name:

          

Frank Zalar

          

   

E-mail:

          

zalarf@crgrp.com

          

   

Address:

          

510 Earl Boulevard, OH 45342 - 6411

          

   

Phone:

          

(937) 320-1877                                                                                                                                                                                

          

   

Name:

          

Jackie Luce

          

   

E-mail:

          

lucejm@crgrp.com

          

   

Address:

          

510 Earl Boulevard, OH 45342 - 6411

          

   

Phone:

          

(937) 320-1877                                                                                                                                                                                

          

   

Estimated Technology Readiness Level (TRL) :                                                                                                                                                          
Begin: 2
End: 4

          

          

     

Technical Abstract (Limit 2000 characters, approximately 200 words):

NASA scientific exploration missions require battery systems to power equipment and telecommunications critical to mission objectives. NASA’s mission profiles demand the highest achievable specific energy as well as operability under extreme conditions of temperature, vacuum, and radiation. While rechargeable battery technologies continue to advance the state-of-the-art to meet NASA’s needs, existing primary battery cell technologies (e.g. Li-CFx) can presently address NASA missions. However, maximizing the utilization of the stored energy will need improvements in state-of-charge (SoC) and state-of-health (SoH) determination/prediction.

Li-CFx cells have attractive characteristics for NASA missions, including very high specific energy, self-heating during discharge, and radiation tolerance. However, discharge rate capability is limited, and the discharge voltage profile is a weakly correlated to SoC. Hybridization of the Li-CFx chemistry with MnO2, has improved discharge rate capability, but SoC determination and prediction remain areas needing improvement, particularly under conditions relevant to NASA missions.

An opportunity exists to advance the state-of-the-art in Li-CFx modeling by using thermodynamic computation along with multiple correlating measurements to determine and predict SoC and SoH to maximize NASA mission performance with this cell chemistry over a wide operating window. CRG proposes to develop an Advanced Primary Cell Model based on coupled thermodynamic and transport calculations combined with multiple monitoring inputs as feedback control. The Advanced Primary Cell Model will enable NASA to maximize mission operations by optimally managing primary cell battery systems over the breadth of mission operating conditions.

 

          

          

     

Potential NASA Applications (Limit 1500 characters, approximately 150 words):

•    Accurate primary cell SoC and lifetime determination/prediction over a wide temperature range

•    Primary cell SoC/SoH determination from degradation mechanisms

 

          

          

     

Potential Non-NASA Applications (Limit 1500 characters, approximately 150 words):

•    Military man-portable energy storage management

•    Aerospace reserve battery management

•    Medical device battery management

 

          

          

     

Duration:     6