Circuit assembly
A circuit assembly includes: a relay; a case that houses the relay; and a bus bar including a fastening part configured to be fastened to a connection part of the relay, and a heat transfer part configured to be in thermally conductive contact with an external heat dissipation target, wherein the relay includes an excitation connector part that is provided on a side surface of the relay, and that is open in a direction opposite to a direction in which the connection part is open, the fastening part of the bus bar protrudes upward from the heat transfer part disposed on a bottom wall side of the case so as to be inclined at an angle larger than 90°, and the excitation connector part of the relay in which the connection part connected to the fastening part of the bus bar is open obliquely upward.
1 . A circuit assembly comprising:
a relay;
a case that houses the relay; and
a bus bar including a fastening part fastened to a connection part of the relay, and a heat transfer part configured to be in thermally conductive contact with an external heat dissipation target,
wherein the relay includes an excitation connector part that is provided on a side surface of the relay, and that is open in a direction opposite to a direction in which the connection part is open,
the fastening part of the bus bar protrudes upward from the heat transfer part disposed on a bottom wall side of the case so as to be inclined at an angle larger than 90°, and
in the relay in which the connection part is fastened to the fastening part of the bus bar, the excitation connector part is open obliquely upward.
2 . The circuit assembly according to claim 1 ,
wherein the case has an opening that exposes the excitation connector part to the outside.
3 . The circuit assembly according to claim 1 ,
wherein the case includes a lower case in which the bus bar is housed, and an upper case that covers an opening of the lower case, and
the upper case includes a fixing part to which the relay is fixed.
4 . The circuit assembly according to claim 3 ,
wherein the upper case has an inclined surface extending parallel to an upper surface of the relay, and the fixing part protrudes from the inclined surface.
5 . The circuit assembly according to claim 3 ,
wherein the lower case has a bottom wall and a side wall, and at least a portion of an upper end of the side wall is located above the connection part of the relay.
6 . The circuit assembly according to claim 1 ,
wherein the heat transfer part of the bus bar is in contact with a contact part of the case via a first heat conductive member having flexibility.
7 . The circuit assembly according to claim 6 ,
wherein the contact part of the case is in contact with the heat dissipation target via a second heat conductive member having flexibility.
8 . The circuit assembly according to claim 7 ,
wherein a gap between the heat transfer part of the bus bar and a bottom surface of the relay is filled with a third heat conductive member having flexibility.
9 . The circuit assembly according to claim 6 ,
wherein the heat transfer part of the bus bar is held in contact with the first heat conductive member via a protrusion provided on the case.