Solid Power DCRC+ Financial Overview

Appendix All-Solid-State Enables Further Cost Savings at the Pack-Level Virtual Teardown of a Notional EV Battery Pack EV Battery Pack Cost Proportions¹ Battery Junction Box Housing Cover (aluminum sheet) Battery Management Controller 1. Cairn ERA. Cell Module Aluminum Crash Structure 17% Housing Tray Battery Frame 3% Cooling system No cooling required, likely just heating Lower Protection Cover 5% 6% 0 9% Safer cells allow for less pack protection removing mass and cost ■ Cells ■Thermal Management System (TMS) ■ Batery Management System (BMS) ■Cabling and Wiring ■Other Components ■ Assembly Safer and higher density all-solid-state is expected to yield significant benefits at the pack-level Solid Power DCRC+ 60% 51

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