Provided is an electrical connection box including a housing casing for housing a relay, and a heat transfer sheet for transferring heat from the relay to the housing casing, the electrical connection box including: a bus bar provided between a top surface and an inside surface that correspond to each other in the housing casing so as to oppose the top surface and the inside surface; a first holding portion protruding from the inside surface and holding the bus bar via the heat transfer sheet; and a second holding portion protruding from the top surface and holding the bus bar.

A harness component according to one aspect of the present disclosure is an electrical connection box, and a harness fixing piece included in a housing of the electrical connection box includes a first wall portion that extends in a length direction of a wire harness, the wire harness being arranged on an inner surface of the first wall portion; a second wall portion that is arranged outside of a lower end, which is an end portion of the first wall portion in a length direction of the wire harness, and is continuous along a lower end; and a bottom portion that extends outward from the lower end of the first wall portion and supports the second wall portion away from the outer surface of the first wall portion.

A harness component according to one aspect of the present disclosure is an electrical connection box, and a harness fixing piece included in a housing of the electrical connection box includes a first wall portion that extends in a length direction of a wire harness, the wire harness being arranged on an inner surface of the first wall portion; a second wall portion that is arranged outside of a lower end, which is an end portion of the first wall portion in a length direction of the wire harness, and is continuous along a lower end; and a bottom portion that extends outward from the lower end of the first wall portion and supports the second wall portion away from the outer surface of the first wall portion.

An electrical junction box is configured such that an electric or electronic component is mounted thereon. The electrical junction box includes a case having an accommodation recess, a housing configured such that the electric or electronic component is held therein and configured to be attached in the accommodation recess, and a cable configured to be drawn into the accommodation recess. The housing includes a path restricting wall configured to restrict a wiring direction of the cable.

An electrical junction box includes a case body having a plurality of connector portions, a power supply side circuit board accommodated in the case body and a spare connector mounting portion provided in an upper portion of the case body and configured such that a spare connector is attached to and detached from the spare connector mounting portion. The spare connector includes a fuse configured to electrically connect the power supply side circuit board to a device side terminal connected to an end of an electric wire configured to be electrically connected to an electronic device.

An electrical junction box includes a case body having a plurality of connector portions, a power supply side circuit board accommodated in the case body and a spare connector mounting portion provided in an upper portion of the case body and configured such that a spare connector is attached to and detached from the spare connector mounting portion. The spare connector includes a fuse configured to electrically connect the power supply side circuit board to a device side terminal connected to an end of an electric wire configured to be electrically connected to an electronic device.

An electrical junction box includes a case body having a plurality of connector portions, a power supply side circuit board accommodated in the case body and a general-purpose connector mounting unit provided in the case body and configured such that a plurality of types of connectors are selectively attached to and detached from the general-purpose connector mounting unit. The general-purpose connector mourning unit is configured such that a power supply side terminal of the plurality of types of connectors is electrically connected to a terminal connection portion of the power supply side circuit board.

An electrical junction box includes a case body having a plurality of connector portions, a power supply side circuit board accommodated in the case body and a general-purpose connector mounting unit provided in the case body and configured such that a plurality of types of connectors are selectively attached to and detached from the general-purpose connector mounting unit. The general-purpose connector mourning unit is configured such that a power supply side terminal of the plurality of types of connectors is electrically connected to a terminal connection portion of the power supply side circuit board.

A junction box includes a housing having a plurality of side wall portions, and a liquid detector including a first terminal portion and a second terminal portion. The junction box is disposed in a housing case housing a power storage module. The first terminal portion and the second terminal portion are directed toward a lower side of one of the side wall portions and drawn out from the inside of the housing to the outside of the housing.

A junction box includes a housing having a plurality of side wall portions, and a liquid detector including a first terminal portion and a second terminal portion. The junction box is disposed in a housing case housing a power storage module. The first terminal portion and the second terminal portion are directed toward a lower side of one of the side wall portions and drawn out from the inside of the housing to the outside of the housing.