Electrical junction box

Abstract

Provided is an electrical junction box configured promptly release the electrical junction box from a state where water has intruded therein, thereby preventing the occurrence of a vehicle fire due towater submersion. An internal circuit includes a high-voltage circuit bus bar (14) and a low-voltage circuit bus bar (16) having a lower potential than the high-voltage circuit bus bar (14), and a lower case (18) includes a bottom wall (36) and a peripheral wall (38) protruding from a peripheral edge portion of the bottom wall (36) toward an upper case (20). A high-voltage circuit region (40) where the high-voltage circuit bus bar (14) is disposed, a low-voltage circuit region (42) where the low-voltage circuit bus bar (16) is disposed, and a dividing wall (44) divides these regions are provided inside the peripheral wall (38). A height dimension (H) of the dividing wall (44) from the bottom wall (36) is configured to be greater than a height dimension (h) of the peripheral wall (38) fromthe bottom wall (36).

Description

technical field [0001] The present invention relates to an electrical junction box mounted on a vehicle such as an automobile, and more particularly to an electrical junction box provided with a structure for preventing fire from entering water. Background technique [0002] Conventionally, electrical connection boxes such as relay boxes and junction boxes have been used in the electrical system of automobiles, and efficient power distribution from the battery to the on-board electrical components and the like has been performed via the electrical connection boxes. In particular, there has been an increase in vehicles using higher voltages and higher currents such as electric vehicles in recent years. For example, as described in Japanese Patent Laid-Open No. 2015-53787 (Patent Document 1), they are also used in addition to low-voltage bus bars that constitute low-voltage circuits. It also has an electrical connection box for the high-voltage bus that constitutes the high-vo...

AI Technical Summary

Problems solved by technology

[0005] However, for the occurrence of such a vehicle fire, the waterproof structure of the conventional electrical junction box as described above cannot perform any effective function, and instead it is easy to make the water that has entered the interior of the electrical junction box remain inside, which may also increase the risk of vehicle fires. risks of

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