Vehicle

Patent metadata

Field	Value
Publication number	US-11535231-B2
Application number	US-202117480766-A
Country	US
Kind code	B2
Filing date	Sep 21, 2021
Priority date	Sep 28, 2020
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A vehicle includes a high-voltage system circuit including a high-voltage battery, a low-voltage system circuit including a low-voltage battery and an updater, a DC-DC converter coupled between the high-voltage system circuit and the low-voltage system circuit, and a controller. The low-voltage battery has a lower output voltage than the high-voltage battery. The updater updates a program of an update-target device with electric power supplied from the low-voltage or high-voltage battery. The DC-DC converter is capable of reducing in voltage output electric power of the high-voltage battery and then supplying the electric power to the updater. The controller sets a target SOC range of the high-voltage battery and controls charging of the high-voltage battery based on the target SOC range. The controller changes a target SOC lower-limit value of the high-voltage battery to a value higher than a normal value when updating of the program of the update-target device is scheduled.

First claim

The invention claimed is:

1. A vehicle comprising:
a high-voltage system circuit comprising
a high-voltage battery;

a low-voltage system circuit comprising
a low-voltage battery having a lower output voltage than the high-voltage battery, and
an updater configured to update a program of an update-target device by using electric power supplied from the low-voltage battery or the high-voltage battery;

a DC-DC converter coupled between the high-voltage system circuit and the low-voltage system circuit and capable of reducing in voltage output electric power of the high-voltage battery and supplying the electric power reduced in voltage to the updater of the low-voltage system circuit; and
a controller configured to set a target state of charge (SOC) range of the high-voltage battery and control charging of the high-voltage battery in accordance with the target SOC range,
wherein the controller is configured to change a target SOC lower-limit value of the high-voltage battery to a value that is higher than a normal value in a case where updating of the program of the update-target device is scheduled.

2. The vehicle according to claim 1 , further comprising:
a wireless communication device configured to wirelessly communicate with an external device,
wherein the controller is configured to determine that updating of the program of the update-target device is scheduled, in a case where the wireless communication device receives update data for updating the program of the update-target device, and
wherein the updater is configured to update, based on the update data, the program of the update-target device.

3. The vehicle according to claim 2 ,
wherein the controller is configured to, in the case where the wireless communication device receives the update data,
calculate electric power used for updating of the program of the update-target device, based on information on the update data, and
change the target SOC lower-limit value of the high-voltage battery, based on the calculated electric power.

4. The vehicle according to claim 1 , further comprising:
an engine configured to serve as a driving source for traveling; and
a motor coupled to the high-voltage battery and configured to serve as a driving source for traveling.

5. The vehicle according to claim 2 , further comprising:
an engine configured to serve as a driving source for traveling; and
a motor coupled to the high-voltage battery and configured to serve as a driving source for traveling.

6. The vehicle according to claim 3 , further comprising:
an engine configured to serve as a driving source for traveling; and
a motor coupled to the high-voltage battery and configured to serve as a driving source for traveling.

Assignees

• Subaru Corp

Inventors

• Komatsu Yusuke
• Kinoshita Takahiro

Classifications

• G06F8/65

  Updates (security arrangements therefor G06F21/57) · CPC title

• B60W2756/00

  Output or target parameters relating to data · CPC title

• H04W4/40 Primary

  for vehicles, e.g. vehicle-to-pedestrians [V2P] · CPC title

• B60L53/68

  Off-site monitoring or control, e.g. remote control · CPC title

• B60L58/13

  Maintaining the SoC within a determined range · CPC title