# US 2026/0100560 A1 · Connection structure and electrical junction box

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- Number: US 2026/0100560 A1
- Document ID: US20260100560A1
- Status: Published application
- Kind: A1
- Application number: 19/347,002
- Filed: 2025-10-01
- Published: 2026-04-09
- Earliest claimed: 2024-10-04
- Assignees: Yazaki Corporation
- Applicants: Yazaki Corporation
- Inventors: Mitsuaki MORIMOTO; Masami IDE
- Web page: https://patentgrep.com/patent/US20260100560A1

## CPC

- H02G 3/08: Distribution boxes; Connection or junction boxes
- B60R 16/0238: {Electrical distribution centers}
- H02G 3/16: structurally associated with support for line-connecting terminals within the box
- B60R 16/03: for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)}
- H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR

## Abstract

A connection structure of a plurality relays and busbars, wherein the relays include: a first relay for switching a first circuit as a predetermined electrical circuit between a powered and a non-powered states; and a second relay for switching a second circuit, which is different from the first circuit, as a predetermined electrical circuit between a powered and a non-powered states, the first and second circuits being configured to be supplied with power in the powered state and to be supplied with no power in the non-powered state. The busbars include: a first busbar connected to the first relay to form the first circuit; and a second busbar connected to the second relay to form the second circuit. The first busbar and the second busbar are connected for releasing heat, wherein the second busbar is in the non-powered state in the powered state of the first circuit.

## Claims

### Claim 1

A connection structure of relays and busbars forming a plurality of electrical circuits,
wherein the relays include:
a first relay configured to switch a first circuit as a predetermined electrical circuit between a powered state and a non-powered state; the first circuit being configured to be supplied with power in the powered state and to be supplied with no power in the non-powered state; and
a second relay configured to switch a second circuit as a predetermined electrical circuit between a powered state and a non-powered state, the second circuit being configured to be supplied with power in the powered state and to be supplied with no power in the non-powered state,
wherein the second circuit is different from the first circuit,
wherein the busbars include:
a first busbar connected to the first relay to form the first circuit; and
a second busbar connected to the second relay to form the second circuit,
wherein the first busbar and the second busbar are connected to be capable of releasing heat, and
wherein the second busbar is configured to be in the non-powered state in the powered state of the first circuit.

### Claim 2 (depends on 1)

The connection structure according to claim 1,
wherein the first busbar and the second busbar are connected to each other via an electrically conductive fastening element.

### Claim 3 (depends on 2)

The connection structure according to claim 2,
wherein the first busbar and the second busbar are connected to each other in connected regions of the first busbar and the second busbar,
wherein each of the connected regions of the first busbar and the second busbar is formed with an arbitrarily selected sheet thickness, and
wherein the first busbar and the second busbar are connected while being in contact with each other in a direction of sheet thickness.

### Claim 4 (depends on 1)

The connection structure according to claim 1,
wherein each of the first busbar and the second busbar includes:
an extending portion extending along a predetermined direction; and
a bent portion which is bent into a direction of bending;
wherein the direction of bending is different from the predetermined direction.

### Claim 5 (depends on 1)

An electrical junction box comprising:
the connection structure according to claim 1; and
a case accommodating the connection structure.