Power supply control device

• US 10,566,663 B2
• Filed: 01/13/2017
• Issued: 02/18/2020
• Est. Priority Date: 01/19/2016
• Status: Active Grant

• Current Assignee: Autonetworks Technologies, Ltd. (Sumitomo Corporation), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Wiring Systems Limited (Sumitomo Corporation)
• Original Assignee: Autonetworks Technologies, Ltd. (Sumitomo Corporation)
• Inventors: Sugisawa, Yuuki
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US15/778,339
• Publication Number:
  US 20180351213A1
• Time in Patent Office: 1,131 Days
• Field of Search: 320314
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H01M 2200/103 Fuse
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02H 3/08 responsive to excess current responsive to abnormal temperature caused by excess current H02H5/04
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: H02J 7/0063 with circuits adapted for supplying loads from the battery
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

In a power supply control device, a microcomputer controls the supply of power from a battery to loads via a battery conductor by individually switching on and off switches. While power is being supplied from the battery to the microcomputer, current flows from the positive electrode of the battery to a battery terminal, the battery conductor, a diode, a resistor, a regulator, the microcomputer, an intermediate conductor, a fuse portion, a GND conductor, and a GND terminal in this order. If a current greater than or equal to a predetermined current flows to the fuse portion, the fuse portion breaks.

Claims

1. A power supply control device having a switch control portion that switches on and off a switch provided in a power supply path from a battery to a load and receives a supply of power from the battery, and an output terminal from which current received from the battery via the switch control portion is output, the power supply control device comprising:

a battery conductor that is provided in a current path of current that flows from the battery to each of the switch and the switch control portion;

a battery substrate on which the battery conductor is formed;

an output conductor that is provided in a current path of current that flows from the fuse portion to the output terminal; and

an output substrate on which the output conductor is formed,

wherein the battery substrate and the output substrate are overlaid on each other with a gap therebetween, and

the output conductor faces a portion of the battery substrate other than a portion where the battery conductor is formed; and

a fuse portion that is connected between the switch control portion and the output terminal, and that breaks if a current greater than or equal to a predetermined current flows to the fuse portion,

wherein while power is being supplied from the battery to the switch control portion, current flows from the battery to the switch control portion, the fuse portion, and the output terminal in this order.

2. The power supply control device according to claim 1, further comprising:

an intermediate conductor that is provided in a current path of current that flows from the switch control portion to the fuse portion; and

an intermediate substrate on which the intermediate conductor is formed,

wherein the output substrate and the intermediate substrate are overlaid on each other with a gap therebetween, and

the output conductor faces a portion of the intermediate substrate other than a portion where the intermediate conductor is formed.

3. The power supply control device according to claim 1,

wherein the fuse portion has a plurality of fuse elements that break if a current greater than or equal to the predetermined current flows to the fuse portion, and

the plurality of fuse elements are connected in parallel to each other.