Vehicle power source system and cooling circuit
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.
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.