VEHICLE CONNECTION CIRCUIT, VEHICLE CONNECTION METHOD, AND VEHICLE BATTERY STRUCTURE

A junction block is interposed between a first battery and a second battery, and a motor, and is configured to electrically connect the first battery, the second battery, and the motor. The junction block includes: a first path; a second path; a third path; a positive-side system main relay; a wire that connects a point between the positive side of the first battery and the positive-side system main relay to the positive side of a DC-DC converter and the positive side of an OBC; a negative-side system main relay; and a wire that connects the downstream side of the negative-side system main relay to the negative side of the DC-DC converter and the negative side of the OBC.