Lear Corporation
Methods and Systems for Handling Passive Entry Passive Start (PEPS) Remote Controller Battery Self-Discharge

Abstract:

A fob for a passive entry passive start (PEPS) system includes a LF receiver, an UHF transmitter, an UWB transceiver, a primary battery to power the receiver and the transmitter, a rechargeable secondary battery to power the transceiver, and a controller. The controller may cause the primary battery to recharge the secondary battery when the secondary battery has a low charge. The controller may cause the transmitter to transmit an indication to a base station of the PEPS system that the primary battery has a low charge. This indication is to alert a user to replace the primary battery. The controller may cause the transmitter to transmit an indication that the secondary battery is dead when the secondary battery is detected to be dead. This indication is to alert the base station that PEPS communications of the fob will not involve the transceiver.