Charging control system for in-vehicle battery

Patent metadata

Field	Value
Publication number	US-12589728-B2
Application number	US-202418897059-A
Country	US
Kind code	B2
Filing date	Sep 26, 2024
Priority date	Oct 5, 2023
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

A charging control system for an in-vehicle battery is to be to be applied to a vehicle and includes a main battery, a sub battery, and a processor. The processor is configured to perform a first charging control and a second charging control. The processor is configured to: in the first charging control, charge the sub battery after a predetermined time is elapsed from time when the vehicle is placed into a traveling function stopped state; in the second charging control, start charging of the sub battery after a time shorter than the predetermined time of the first charging control is elapsed; and perform the second charging control when the processor determines, based on time data and position data of the vehicle, that the vehicle is placed into the traveling function stopped state at a predetermined location and within a predetermined time zone.

First claim

The invention claimed is:

1 . A charging control system for an in-vehicle battery, the charging control system being configured to be applied to a vehicle, the charging control system comprising:
a main battery configured to perform a supply of electric power to a driving motor mounted on the vehicle; a sub battery coupled to the main battery via an electric circuit and configured to be charged by the supply of the electric power from the main battery; and a processor configured to perform a first charging control and a second charging control, wherein the processor is configured to: in the first charging control, operate the electric circuit and charge the sub battery after a predetermined time is elapsed from time when the vehicle is placed into a traveling function stopped state, the traveling function stopped state being a state of the vehicle in which a traveling function of the vehicle is stopped; in the second charging control, start charging of the sub battery after a time shorter than the predetermined time of the first charging control is elapsed; and perform the second charging control when the processor determines, based on time data and position data, that the vehicle is placed into the traveling function stopped state at a predetermined location set in advance and within a predetermined time zone, the position data being data on a position of the vehicle acquired by a position data acquirer.

2 . The charging control system for the in-vehicle battery according to claim 1 , wherein
the vehicle comprises an engine, and the processor is configured to perform the first charging control when: the processor determines that the vehicle is placed into the traveling function stopped state at the predetermined location and within the predetermined time zone; and a fuel amount of the engine is equal to or less than a predetermined threshold, and perform the second charging control when: the processor determines that the vehicle is placed into the traveling function stopped state at the predetermined location and within the predetermined time zone; and the fuel amount of the engine exceeds the threshold.

3 . The charging control system for the in-vehicle battery according to claim 2 , wherein the processor is configured to perform the second charging control when: the processor determines that the vehicle is placed into the traveling function stopped state at the predetermined location and within the predetermined time zone; the fuel amount of the engine is equal to or less than the threshold; and a voltage of the sub battery is equal to or less than a predetermined threshold or a deterioration state of the sub battery is equal to or less than a predetermined threshold.

4 . The charging control system for the in-vehicle battery according to claim 1 , wherein the processor is configured to
perform the first charging control when: the processor determines that the vehicle is placed into the traveling function stopped state at the predetermined location and within the predetermined time zone; and a traveling mode of the vehicle before the vehicle is placed into the traveling function stopped state is an eco mode, the eco mode being configured to increase a cruising distance of the vehicle as compared with a normal mode comprised in the traveling mode, and perform the second charging control when: the processor determines that the vehicle is placed into the traveling function stopped state at the predetermined location and within the predetermined time zone; and the traveling mode is not the eco mode.

5 . The charging control system for the in-vehicle battery according to claim 4 , wherein the processor is configured to perform the second charging control when: the processor determines that the vehicle is placed into the traveling function stopped state at the predetermined location and within the predetermined time zone; the traveling mode is the eco mode; and a voltage of the sub battery is equal to or less than a predetermined threshold or a deterioration state of the sub battery is equal to or less than a predetermined threshold.

Assignees

• Subaru Corp

Inventors

• Kubo Tatsuhiro
• Omori Minoru

Classifications

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• B60W2520/04

  Vehicle stop · CPC title

• B60W2530/209

  Fuel quantity remaining in tank · CPC title

• B60W2510/244

  Charge state · CPC title

• H02J7/342 Primary

  The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging (with circuits for polarity protection H02J7/68) · CPC title