Seal structure of power control unit
A power control unit includes a power module, a water jacket, and a power supply connection module. The water jacket has a through hole passing through the water jacket from one side surface thereof to the other side surface thereof. The power supply connection module includes a connection conductor passing through the through hole and configured to connect an internal power supply path to an external power supply path and a conductor housing configured to hold at least a part of the periphery of the connection conductor on the external power supply path side. A seal member configured to seal the periphery of the through hole is disposed between the water jacket and the conductor housing.
1. A seal structure of a power control unit, comprising:
a power module;
a water jacket in which the power module is disposed on one surface thereof and which cools the power module using cooling water flowing therein; and
a power supply connection module attached to another surface of the water jacket and configured to connect an internal power supply path of the power module to an external power supply path of a motor unit,
wherein the water jacket has a through hole passing through the water jacket from the one surface of the water jacket to the another surface thereof,
the power supply connection module includes:
a connection conductor passing through the through hole and configured to connect the internal power supply path to the external power supply path; and
a conductor housing configured to hold at least a part of the periphery of the connection conductor on a side of the external power supply path, and
a seal member configured to seal the periphery of the through hole is disposed between the water jacket and the conductor housing.
2. The seal structure of the power control unit according to claim 1 , wherein the connection conductor includes three connection conductors provided to correspond to phases of three-phase alternating current (AC), and
the three connection conductors are held in the conductor housing.
3. The seal structure of the power control unit according to claim 1 , wherein a cylindrical wall communicating with the through hole protrudes from the another surface of the water jacket,
a protrusion section inserted into the cylindrical wall is provided in the conductor housing, and
the seal member is disposed between an outer circumferential surface of the protrusion section and an inner circumferential surface of the cylindrical wall.
4. The seal structure of the power control unit according to claim 1 , wherein the conductor housing has a base wall in contact with the another surface of the water jacket, and
the seal member is disposed between a circumferential portion of the through hole in the another surface of the water jacket and the base wall.
5. The seal structure of the power control unit according to claim 1 , wherein the connection conductor includes:
a module-side bus bar connected to the internal power supply path;
a motor-side bus bar connected to the external power supply path;
a braided wire configured to connect the module-side bus bar to the motor-side bus bar; and
at least a part of the braided wire is positioned in the through hole.