Power supply system

Patent metadata

Field	Value
Publication number	US-2018126856-A1
Application number	US-201515573728-A
Country	US
Kind code	A1
Filing date	May 12, 2015
Priority date	May 12, 2015
Publication date	May 10, 2018
Grant date	—

Abstract

A power supply system in a vehicle having an idling stop function for executing an automatic stop and an automatic restart on an engine has a power generator, a first storage unit that can be charged with and can discharge generated power generated by the power generator, a second storage unit that can be charged with and can discharge the generated power, two paths connecting the first storage unit and the second storage unit, a switching unit including a first switch for switching one path of the two paths between a conductive condition and a non-conductive condition, and a second switch for switching another path of the two paths between a conductive condition and a non-conductive condition, and an engine restarter connected to either the first storage unit side or the second storage unit side of the switching unit in order to start the engine during the automatic restart.

First claim

1 . A power supply system in a vehicle having an idling stop function for executing an automatic stop and an automatic restart on an engine, the power supply system comprising:
a power generator; a first storage unit that can be charged with and can discharge generated power generated by the power generator; a second storage unit that can be charged with and can discharge the generated power; two paths connecting the first storage unit and the second storage unit; a switching unit including a first switch for switching one path of the two paths between a conductive condition and a non-conductive condition, and a second switch for switching another path of the two paths between a conductive condition and a non-conductive condition; an engine restarter connected to either the first storage unit side or the second storage unit side of the switching unit in order to start the engine during the automatic restart; an electrical load of the vehicle, which is connected to the first storage unit side of the switching unit; and a controller configured to implement ON/OFF control on the first switch and the second switch, wherein the controller switches both the first switch and the second switch to the conductive condition while the engine is operative, except during a starting stage of the automatic restart, and during the idling stop, whereby discharge from the second storage unit to the electrical load is performed using both of the two paths.

2 . The power supply system as defined in claim 1 , wherein the controller switches the second switch to the non-conductive condition when deceleration regeneration is underway in the vehicle.

3 . The power supply system as defined in claim 1 ,
wherein the power generator is disposed on the second storage unit side of the switching unit, and wherein the controller switches the first switch to the non-conductive condition when deceleration regeneration is underway in the vehicle.

Assignees

• Nissan Motor

Inventors

• Tahara Masahiko
• Tezuka Atsushi
• Koike Tomoyuki
• Watanabe Munemitsu
• Koishi Akifumi
• Tsuchiya Terumasa

Classifications

• B60L50/50

  using propulsion power supplied by batteries or fuel cells · CPC title

• B60L7/10

  Dynamic electric regenerative braking (B60L7/22 takes precedence) · CPC title

• F02N11/0866

  comprising several power sources, e.g. battery and capacitor or two batteries · CPC title

• B60L50/16 Primary

  with provision for separate direct mechanical propulsion · CPC title

• B60R16/033

  characterised by the use of electrical cells or batteries (for propulsion puposes B60K1/04; supplying batteries to, or removing batteries from, vehicles B60S5/06; testing of charge state G01R31/36) · CPC title