Jan2012_questionnaire.pdf

ENGINE, EMISSIONS, AND VEHICLE RESEARCH DIVISION SwRI Energy Storage System Evaluation and Safety (EssEs) Consortium Member Feedback Questionnaire Dear EssEs Member:
The purpose of this questionnaire is to seek a consensus on selecting cells of interest and to identify a common area of interest for the EssEs Consortium’s Year 2 proposed research project. We would like to receive your responses by February 29th, 2012. Your timely feedback is very important to the success of the Consortium and is highly valued by the SwRI EssEs team. Cells of Interest
For reference purposes, the following four (4) types of “primary” cells are under full A123 Systems 32113 Lithium Iron Phosphate cathode (4.4 Ahr 3.2 V) EIG F014 Lithium Iron Phosphate cathode (14 Ahr 3.2 V) Toshiba ScIB Lithium Titanate anode (4.2 Ahr 2.4 V) LG Chemical Lithium Manganese Oxide cathode (15 Ahr 3.7 V) The following five (5) types of “secondary” cells are either procured or under acquisition: A123 Systems Lithium Iron Phosphate cathode (20 Ahr 3.2 V) (acquired) ATL Battery Lithium Iron Phosphate cathode (60 Ahr or 35 Ahr 3.2 V) (in process) Lishen Battery Lithium Iron Phosphate cathode (16.5 Ahr 3.2 V) (in process) Altair Nano Lithium Titanate anode (13 Ahr ~2.3 V) (in process) CENAT (JV between ENAX and CATARC) Lithium Nickel Cobalt Manganese Oxide cathode (25 Ahr 3.7 V) (in process) S A N A N T O N I O , T E X A S
Ɣ    : $ 6 + , 1 * 7 2 1   ' &  Ɣ     $ 1 1  $ 5 % 2 5   0 , The EssEs team requests your feedback on following questions: What other cell manufacturers’ cells are you interested in seeing tested? Please specify the top three (3) companies in descending order of interest.
______________________________________________________ ______________________________________________________ ______________________________________________________ Specify up to three (3) cells that you are interested in testing. Please complete all fields.
Manufacturer
Chemistry
Capacity
Cell Format
(e.g. LFP)
(Prismatic/Pouch/Cylindrical)
Would your company be willing to provide cells to the consortium for testing? If you are a vehicle manufacturer or system integrator, would you be willing to provide cells that you have or can procure through an existing program/relationship with a battery supplier? Would you be willing to provide cells to consortium at no cost? Please list any additional comments you wish to direct to the EssEs team.
Topical Area of Research
The EssEs team is proposing to do work on one topical area for Year 2, due to the challenges of cell procurement. Please vote on the following three (3) proposed topical areas of interest based on the research background and your application needs.
Improved Method of Battery Size Factor (BSF) Determination
x Objective: Investigating an objective method of calculating BSF
x Background:
Current BSF determination is a subjective process according to U. S. Department of Energy Vehicle Technologies Program. The result will influence pack size for specific application. The BSF determination process is linearly dependent upon values chosen for Vmin, Vmax, DODmin, and DODmax.
x Proposed Research:
Vmin, Vmax, DODmin, and DODmax will be experimentally determined through proper experimental designs.
Cell Strain vs. State of Charge (SOC)
x Objective: Develop an innovative method for SOC measurement
x Background:
During charging and discharging it is known that there is change in volume of electrodes due to constant Li-ion intercalation and de-intercalation x Proposed Research:
If internal temperature based expansion can be referenced out, the external strain will be a reflection of volume changes of electrode materials due to charge/discharge process. Strain gauges and thermocouples will be mounted to generate data during charge/discharge cycling. Following diagrams are two preliminary experimental results. Lithium Plating Effect at Low Temperature
x Objective: Identify lithium plating using cyclic voltammetry (CV)
x Background:
Lithium plating detrimentally affects performance and cycle life of battery.
Batteries with lithium plating are known to be more vulnerable to failure if exposed to vibration or other stressful conditions.
x Proposed Research:
Testing will be done on 16 cells: 4 cells at each temperature at 4 temperatures (-35, -20, -10, and 0 deg C). Cells will be conditioned at 25 deg C and tested at a given SOC with increasing magnitude current pulses at a given test temperature. After a current pulse at a test temperature, cells will be brought back to 25 deg C and cyclic voltammetry will be performed. The results of cyclic voltammetry will be used to attempt to identify conditions which result in plating.
The voting scale will be from 1 to 3 with 1 being the area that you are most interested in and 3 being the area that you are the least interested in. 5. Please suggest other topical area of interest if you like.
CONCLUSION
Please return the completed form to either Bapi Surampudi at [email protected] or Kimberly Quintero at [email protected]. Thank you for your timely response in this matter.
EssEs TeamDepartment of Engine and Vehicle R&D

Source: http://swri.org.cn/4org/d03/vehsys/advveh/esses/pdfs/Jan2012_questionnaire.pdf