Inventors:
Duane Selwyn Anderson - Gilroy CA
Jon David Armantrout - Mt. View CA
Gregor Jon Cuzner - San Jose CA
Assignee:
Lockhead Martin Corporation - Sunnyvale CA
International Classification:
G01N 2702
US Classification:
324443, 324427, 73720, 73726, 429 90
Abstract:
A strain gage system for determining state of charge in a battery having a pressure vessel includes a strain gage bridge system mounted on a first cylindrical portion of the pressure vessel. The bridge system has a plurality of active strain gages and no inactive or dummy gages. An electrical output of the strain gage bridge is correlated to a state of charge of the battery.