1. DNV, NexTech Materials, Beckett Energy Systems Sensor Enhanced and Model Validated Life Extension of Li-ion Batteries for Energy Storage ARPA-e AMPED Program

2. © Det Norske Veritas AS. All rights reserved. Technology Advantage and Differentiation Novel, non invasive sensing technique for battery degradation and off gas Validation and economic test of second life of batteries Deployment of second life system with sensors in a commercial community energy storage system Sensor Enhanced and Model Validated Life Extension of Batteries for Energy Storage DNV, NexTech Materials, Beckett Energy Systems Davion Hill, Ph.D., Senior Engineer DNV Research 614.761.1214, Davion.M.Hill@dnv.com Performance Targets Please contact regarding: R&D, technology validation, collaboration, press, business development MetricState of the ArtProposed Sensor for multiple cell faults Temperature or voltage Novel off-gas sensor Battery life prediction with +/- 10% accuracy Intentional overdesign Life extension with doubled revenue Demonstration of second life in CES Never been done Validation of performance The sensor concept is unobtrusive and nondestructive. Monitoring in this fashion offers the following benefits: Improved safety Providing a warning mechanism for flammable off gas Correlating state of health or stress with off gas activity Viable for stationary or mobile applications Addressing safety is a unique feature of this technology. DNV is testing a novel off gas measurement concept to detect degradation in Li-ion batteries. This monitoring and measurement concept will be used to monitor batteries under varied stress, and demonstrate safe monitoring of second life batteries in a community energy storage application.

3. © Det Norske Veritas AS. All rights reserved. Can off gas be used for monitoring and control? Sensor Enhanced and Model Validated Life Extension of Batteries for Energy Storage

4. © Det Norske Veritas AS. All rights reserved. Testing Modeling Evaluation Off gas sensor monitoring Demonstration Batteries Energy storage technology Project Partners and Roles Sensor Enhanced and Model Validated Life Extension of Batteries for Energy Storage

5. © Det Norske Veritas AS. All rights reserved. Sensor Prototype Platform Prototype Sensor Construction Tubular element packaged on TO8 header with resistive heater Packaged element soldered to circuit board and installed in housing Prototype Device I/O –12-24VDC input –Heater control –Signal processing (element resistance 0-5VDC output) GOAL: Monitor EC and DEC off gas from batteries Sensor Enhanced and Model Validated Life Extension of Batteries for Energy Storage Contact: Lora Thrun l.thrun@nextechmaterials.com

6. © Det Norske Veritas AS. All rights reserved. Integrated Approach to Battery Qualification 1 2 3 4 5 Contact: Davion.M.Hill@dnv.com

7. © Det Norske Veritas AS. All rights reserved. Demonstration Contact: Brad Moore bmoore@beckettcorp.com bmoore@beckettcorp.com Distributed Energy Storage At the Grid Edge Sensor Enhanced and Model Validated Life Extension of Batteries for Energy Storage

8. © Det Norske Veritas AS. All rights reserved.8 Temperature ramping and heat soak Thermal and Cycle Testing to Qualify Sensing Mechanism Environmental boxes Gas control, monitoring, and sampling Sensor Enhanced and Model Validated Life Extension of Batteries for Energy Storage

9. © Det Norske Veritas AS. All rights reserved. Facilities 9

10. © Det Norske Veritas AS. All rights reserved. Community Energy Storage 10