Power source system for a vehicle

Patent metadata

Field	Value
Publication number	US-2017106758-A1
Application number	US-201514887397-A
Country	US
Kind code	A1
Filing date	Oct 20, 2015
Priority date	Jul 31, 2013
Publication date	Apr 20, 2017
Grant date	—

Abstract

A hybrid power source connects a secondary battery and an EDLC. A first switch connects the hybrid power source and a lead acid battery in parallel. A power source controlling portion controls power supply to the hybrid power source and the lead acid battery. The hybrid power source is connected to a starter for starting an engine for a vehicle, and also connected to an electric device except for the starter through the first switch, and the lead acid battery is connected to the electric device, and also connected to the starter through the first switch.

First claim

1 . A power source system for a vehicle comprising:
a lead acid battery; a hybrid power source connecting a secondary battery except for the lead acid battery and a capacitor in parallel; a switch between power sources connecting the hybrid power source and the lead acid battery in parallel; and a power source controlling portion for controlling power supply to and charging the hybrid power source and the lead acid battery, wherein the hybrid power source is connected to a starter for starting an engine for the vehicle, and also connected to a general load except for the starter through the switch between the power sources, and the lead acid battery is connected to the general load, and also connected to the starter through the switch between the power sources.

2 . The power source system for the vehicle according to claim 1 ,
wherein in a case where the engine restarts, the power source controlling portion turns off the switch between the power sources.

3 . The power source system for the vehicle according to claim 1 ,
wherein in a case where a restart of the engine is not done by the hybrid power source, the power source controlling portion is supplied from the lead acid battery to the starter.

4 . The power source system for the vehicle according to claim 1 ,
further comprising a switch inside the power source for connecting the secondary battery and the capacitor in parallel, wherein the secondary battery is connected to the starter, the capacitor is connected to the starter through the switch inside the power source, and the secondary battery is connected to the switch between the power sources.

5 . The power source system for the vehicle according to claim 1 ,
further comprising a switch inside the power source for connecting the secondary battery and the capacitor in parallel, wherein the secondary battery is connected to the starter through the switch inside the power source, and the lead acid battery is connected to the starter through the switch inside the power source and the switch between the power sources.

6 . The power source system for the vehicle according to claim 4 ,
further comprising a secondary battery connection switch, one end of the secondary battery connection switch connected to the secondary battery, and another end of the secondary battery connection switch connected to the starter, the switch between the power sources, and the switch inside the power source.

7 . The power source system for the vehicle according to claim 4 ,
further comprising a bypass switch for bypassing the switch between the power sources and the switch inside the power source, and connecting the lead acid battery and the starter.

8 . The power source system for the vehicle according to claim 7 ,
further comprising a secondary battery connection switch one end of the secondary battery connection switch connected to the secondary battery, and another end of the secondary battery connection switch connected to the starter, the switch between the power sources, and the switch inside the power source.

9 . The power source system for the vehicle according to claim 7 ,
further comprising a capacity connection switch, one end of the capacity connection switch connected to the capacity, and another end of the capacity connection switch connected to the starter, the switch inside the power source, and the bypass switch.

10 . The power source system for the vehicle according to claim 4 ,
further comprising a pre-charge circuit connected in parallel to the switch inside the power source, wherein in a current limiting mode for limiting a parallel current between the secondary battery and the capacitor, the power source controlling portion turns off the switch inside the power source, and turns on the pre-charge circuit, and in a large current mode for allowing the parallel current larger than that of the current limiting mode, the power source controlling portion turns on the switch inside the power source, and turns off or on the pre-charge circuit.

11 . The power source system for the vehicle according to claim 4 ,
further comprising a discharge switch connected in parallel to the capacitor.

12 . The power source system for the vehicle according to claim 5 ,
wherein in a case where the engine starts by turning on an ignition switch of the vehicle, the power source controlling portion turns on the switch between the power sources.

13 . The power source system for the vehicle according to claim 5 ,
further comprising a secondary battery connection switch, one end of the secondary battery connection switch connected to the secondary battery, and another end of the secondary battery connection switch connected to the starter, the switch between the power sources, and the switch inside the power source.

14 . The power source system for the vehicle according to claim 5 ,
further comprising a bypass switch for bypassing the switch between the power sources and the switch inside the power source, and connecting the lead acid battery and the starter.

15 . The power source system for the vehicle according to claim 14 ,
further comprising a secondary battery connection switch, one end of the secondary battery connection switch connected to the secondary battery, and another end of the secondary battery connection switch connected to the switch between the power sources and the switch inside the power source.

16 . The power source system for the vehicle according to claim 14 ,
further comprising a capacity connection switch, one end of the capacity connection switch connected to the capacity, and another end of the capacity connection switch connected to the starter, the switch inside the power source, and the bypass switch.

17 . The power source system for the vehicle according to claim 14 ,
wherein in a case where the engine restarts by turning on an ignition switch of the vehicle, the power source controlling portion turns on the bypass switch, and turns off the switch between the power sources and the switch inside the power source.

18 . The power source system for the vehicle according to claim 5 ,
further comprising a pre-charge circuit connected in parallel to the switch inside the power source, wherein in a current limiting mode for limiting a parallel current between the secondary battery and the capacitor, the power source controlling portion turns off the switch inside the power source, and turns on the pre-charge circuit, and in a large current mode for allowing the parallel current larger than that of the current limiting mode, the power source controlling portion turns on the switch inside the power source, and turns off or on the pre-charge circuit.

19 . The power source system for the vehicle according to claim 18 wherein selecting the current limiting mode or the large current mode corresponding to a voltage of the secondary battery and a voltage of the capacitor, the power source controlling portion charges the capacitor with a storage energy of the secondary battery.

20 . The power source system for the vehicle according to claim 5 ,
further comprising a discharge switch connected in parallel to the capacitor.

Assignees

• Sanyo Electric Co
• Panasonic Corp

Inventors

• Sakatani Toshihiro
• Sugii Hiromasa
• Ochi Makoto
• Morita Kazuki
• Yamaguchi Takumi
• Mitani Yohsuke

Classifications

• H02J2105/33

  exchanging power with road vehicles · CPC title

• H02J7/345

  using capacitors as storage or buffering devices · 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

• B60L50/50 Primary

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

• B60L11/18 Primary

  Operations & Transport · mapped topic