IN-VEHICLE POWER SOURCE DEVICE

• US 20130175856A1
• Filed: 11/21/2012
• Published: 07/11/2013
• Est. Priority Date: 01/11/2012
• Status: Active Grant

• Current Assignee: Suzuki Motor Corporation
• Original Assignee: Suzuki Motor Corporation
• Inventors: OJIMA, Hiroyuki
• Granted Patent: US 9,242,559 B2
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: B60L 1/00 Supplying electric power to auxiliary equipment of vehicles circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 3/0023 Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
• CPC Class Codes: B60L 50/15 with additional electric power supply with capacitors charged by engine-driven generators B60L50/40; with batteries charged by engine-driven generators B60L50/61
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Abstract

There is provided an in-vehicle power source device having favorable workability for replacing a fuse that melts down when an overcurrent flows to an electric load. A battery selector switch 51 having a current detecting function, a main relay 52 having current detecting function, a bypass relay 54 for bypassing the battery selector switch 51, and a bypass fuse 53 to melt down when an overcurrent flows to a second electric load 35 are provided. The bypass fuse 53 is deployed outside of a case 58 for storing a second power source 34, the bypass fuse 53 and the second power source 34 are connected in series, and when currents detected by the battery selector switch 51 and the main relay 52 are equal to or greater than a predetermined value, the battery selector switch 51 and the main relay 52 are turned off and the bypass relay 54 is closed.

Claims

1. An in-vehicle power source device comprising:

a first power source and a second power source for providing power to at least one electric load;

a first opening-closing switch provided along a feed line between the electric load and the first power source;

a second opening-closing switch provided along a feed line between the electric load and the second power source;

a bypass switch for bypassing the first opening-closing switch; and

a fuse to melt down when an overcurrent flows to the electric load;

the in-vehicle power source device further comprising

a current detector for detecting a current flowing the electric load, wherein

the fuse is deployed outside of a case for storing the second power source,

the fuse and the bypass switch are connected in series, and

when a current detected by the current detector is equal to or greater than an a predetermined value, the first opening-closing switch and the second opening-closing switch are turned off and the bypass switch is turned on.

2. The in-vehicle power source device according to claim 1, wherein the bypass switch is deployed outside of the case.

3. The in-vehicle power source device according to claim 1, wherein the current detector comprises a first current detector for detecting a current flowing to the first opening-closing switch, and a second current detector for detecting a current flowing to the second opening-closing switch, and

when a total sum of a current detected by the first current detector and a current detected by the second current detector current is equal to or greater than a predetermined value, the first opening-closing switch and the second opening-closing switch are turned off and the bypass switch is turned on.

4. The in-vehicle power source device according to claim 3, wherein the first current detector is provided within the first opening-closing switch, and the second current detector is provided within the second opening-closing switch.