You know if I was developing a new product (any product) it would probably need some firmware.  Lithium ion battery cells have a battery management system which consists of hardware and software (firmware).  To me this position is consistent with the developement of a new battery cell.  They already have an NMC battery cell with a battery management system (BMS) so this new type must be different enough to need a complete new design of BMS.  That also would be consistent with a solid state cell they have been working on for years.

If you have shares, I would hold on to them for a while as they may become more valuable overnight if they announce a solid state cell.  JMHO  just my opinion.