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

A junction block (20) is interposed between a first battery (11) and a second battery (12), and a motor (40), and is configured to electrically connect the first battery (11), the second battery (12), and the motor (40). The junction block (20) includes: a first path (51); a second path (52); a third path (53); a positive-side system main relay (21); a wire (W10) that connects a point between the positive side of the first battery (11) and the positive-side system main relay (21) to the positive side of a DC-DC converter (62) and the positive side of an OBC (63); a negative-side system main relay (31); and a wire (W11) that connects the downstream side of the negative-side system main relay (31) to the negative side of the DC-DC converter (62) and the negative side of the OBC (63).