Vehicle power source system and cooling circuit

Patent metadata

Field	Value
Publication number	US-10457156-B2
Application number	US-201515528835-A
Country	US
Kind code	B2
Filing date	Oct 27, 2015
Priority date	Dec 4, 2014
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A vehicle power source system includes: a high-voltage battery; a high-voltage system equipment having a DC-DC converter and a charger; and a cooling circuit having a high-voltage battery cooling unit for cooling the high-voltage battery, a DC-DC converter cooling unit for cooling the DC-DC converter, and charger cooling unit for cooling the charger. In the cooling circuit, the DC-DC converter cooling unit and the charger cooling unit are disposed in parallel on a downstream side of the high-voltage battery cooling unit.

First claim

The invention claimed is:

1. A vehicle power source system comprising:
a high-voltage battery;
a high-voltage system equipment having a DC-DC converter and a charger; and
a cooling circuit having a high-voltage battery cooling unit for cooling the high-voltage battery, a DC-DC converter cooling unit for cooling the DC-DC converter, and a charger cooling unit for cooling the charger, wherein
in the cooling circuit, the DC-DC converter cooling unit and the charger cooling unit are disposed in parallel on a downstream side of the high-voltage battery cooling unit,
the cooling circuit has a flow rate control device on an upstream side of the DC-DC converter cooling unit,
the flow rate control device is disposed between a branch portion where a flow to the DC-DC converter cooling unit and a flow to the charger cooling unit are branched off, and the DC-DC converter cooling unit, and
the flow rate control device is not disposed between the branch portion and the charger cooling unit.

2. The vehicle power source system according to claim 1 , wherein
the cooling circuit has:
a bypass flow path which connects an upstream side of the high-voltage battery cooling unit to a portion that is positioned on an upstream side of the DC-DC converter cooling unit and the charger cooling unit and that is positioned on a downstream side of the high-voltage battery cooling unit; and
a flow path selector which is provided on the upstream side of the high-voltage battery cooling unit.

3. The vehicle power source system according to claim 2 , wherein
the flow path selector is a solenoid valve.

4. The vehicle power source system according to claim 2 , wherein
the flow path selector is a three-way solenoid valve which is provided at a branch portion where the bypass flow path branches off from an upstream-side flow path of the high-voltage battery cooling unit.

5. A cooling circuit comprising:
a radiator;
a cooling pump;
a high-voltage battery cooling unit for cooling a high-voltage battery; and
a high-voltage system equipment cooling unit for a cooling high-voltage system equipment, wherein
the radiator, the cooling pump, the high-voltage battery cooling unit, and the high-voltage system equipment cooling unit being connected in series,
the high-voltage system equipment cooling unit has at least two cooling units,
the at least two cooling units are disposed in parallel on a downstream side of the high-voltage battery cooling unit,
the at least two high-voltage system equipment cooling units include a DC-DC converter cooling unit and a charger cooling unit,
a flow rate control device is provided on an upstream side of the DC-DC converter cooling unit,
the flow rate control device is disposed between a branch portion where a flow to the DC-DC converter cooling unit and a flow to the charger cooling unit are branched off, and the DC-DC converter cooling unit, and
the flow rate control device is not disposed between the branch portion and the charger cooling unit.

6. The cooling circuit according to claim 5 , wherein
the cooling circuit has:
a bypass flow path which connects an upstream side of the high-voltage battery cooling unit to a portion that is positioned on an upstream side of the DC-DC converter cooling unit and the charger cooling unit and that is positioned on a downstream side of the high-voltage battery cooling unit; and
a flow path selector which is provided on the upstream side of the high-voltage battery cooling unit.

7. The cooling circuit according to claim 6 , wherein
the flow path selector is a solenoid valve.

8. The cooling circuit according to claim 6 , wherein
the flow path selector is a three-way solenoid valve which is provided at a branch portion where the bypass flow path branches off from an upstream-side flow path of the high-voltage battery cooling unit.

Assignees

• Honda Motor Co Ltd

Inventors

• Takizawa Daijiro
• Ito Satoko

Classifications

• B60K2001/0433

  Arrangement under the rear seats · CPC title

• B60L53/53

  Batteries · CPC title

• B60K11/02

  with liquid cooling · CPC title

• H01M10/6556

  Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) · CPC title

• B60K2001/005

  the electric storage means · CPC title