Power supply control system for vehicle and method
First Claim
1. A power supply control system for a vehicle in which an idling stop control is performed such that an engine is automatically stopped and started in accordance with an operating state of the vehicle, the power supply control system comprising:
- a first battery connected to a starter of the vehicle;
a second battery connected to the starter of the vehicle, and having an energy density higher than that of the first battery and having an output density lower than that of the first battery; and
a controller operative to select the first battery to be connected to the starter so as to receive a power supply from the first battery under a first condition where the engine is started to cause the vehicle to take off, and to select the second battery to be connected to the starter so as to receive the power supply from the second battery under a second condition where the engine is started by the idling stop control.
1 Assignment
0 Petitions
Accused Products
Abstract
A power supply control system for a vehicle that is provided with a lead-acid battery with comparatively high output density and low energy density, and a lithium-ion battery with comparatively low output density and high energy density. On an engine start that accompanies an ignition operation of a vehicle operator, power is supplied to a starter from the lead-acid battery and the engine is started. On an engine restart that accompanies an idling stop control, power is supplied to the starter from the lithium-ion battery and the engine is started.
-
Citations
19 Claims
-
1. A power supply control system for a vehicle in which an idling stop control is performed such that an engine is automatically stopped and started in accordance with an operating state of the vehicle, the power supply control system comprising:
-
a first battery connected to a starter of the vehicle; a second battery connected to the starter of the vehicle, and having an energy density higher than that of the first battery and having an output density lower than that of the first battery; and a controller operative to select the first battery to be connected to the starter so as to receive a power supply from the first battery under a first condition where the engine is started to cause the vehicle to take off, and to select the second battery to be connected to the starter so as to receive the power supply from the second battery under a second condition where the engine is started by the idling stop control. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A power supply control method for a vehicle in which an idling stop control is performed such that an engine is automatically stopped and started in accordance with an operating state of the vehicle, and a first battery and a second battery having a higher energy density and a lower output density than the first battery are connected to a starter, the power supply control method comprising:
-
selecting the first battery to be connected to the starter so as to receive a power supply from the first battery under a first condition where the engine is started to cause the vehicle to take off; and selecting the second battery to be connected to the starter so as to receive the power supply from the second battery under a second condition where the engine is started by the idling stop control. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
-
Specification