SECONDARY ON-BOARD NETWORK BATTERY FOR A SECONDARY ON-BOARD NETWORK THAT IS REDUNDANT TO A PRIMARY ON-BOARD NETWORK OF A MOTOR VEHICLE, ON-BOARD NETWORK SYSTEM, AND MOTOR VEHICLE

摘要

The invention relates to a secondary on-board network battery (7) for a secondary on-board network (5) that is redundant to a primary on-board network (2) of a motor vehicle, comprising: a battery cell composite (11) for providing electrical energy; a first connection (13) for electrically connecting the secondary on-board network battery (7) to at least one secondary on-board network component (6); a second connection (14) for electrically connecting the secondary on-board network battery (7) to the primary on-board network (2); a first switching device (15) between the first connection (13) and a connection point (16) that is electrically connected to the battery cell composite (11); a second switching device (18) between the second connection (14) and the connection point (16), and a control unit (21) configured to provide a conducting state for both switching devices (15, 18) for supplying the at least one secondary on-board network component (6) from the primary on-board network (2), and for providing a locking state for the second switching device for keeping an overload on the primary on-board network side away. The invention further relates to an on-board network system (1), and to a motor vehicle.