Method for 12V primary battery load test prior to propulsion active on EV (electric vehicle) platforms

摘要

The present invention provides a novel method to load test 12V primary battery system found on EV (electric vehicle) and hybrid electric platforms in order to prevent 12V bus brownout during heavy load due to degraded power capability of the 12V battery. Various methods are described below for determining whether a 12V battery has degraded power capability, in lieu of an engine-cranking load. a) Fig. 1 illustrates 12V degradation failure mode differences between traditional ICE (internal combustion engine) and EV (electric vehicle) platforms.