18490957. PRE-CHARGE BATTERY ELECTRICAL SYSTEM FROM DISCRETE BATTERY STRINGS (Caterpillar Inc.)
PRE-CHARGE BATTERY ELECTRICAL SYSTEM FROM DISCRETE BATTERY STRINGS
Organization Name
Inventor(s)
Timothy Beetler of Peoria IL US
Jose D. Miranda of Peoria IL US
PRE-CHARGE BATTERY ELECTRICAL SYSTEM FROM DISCRETE BATTERY STRINGS
This abstract first appeared for US patent application 18490957 titled 'PRE-CHARGE BATTERY ELECTRICAL SYSTEM FROM DISCRETE BATTERY STRINGS
Original Abstract Submitted
A battery system includes a load bus to connect to a DC link, a single pre-charge circuit connected to the load bus, multiple battery packs, and a control circuit. Each battery pack includes multiple battery strings that include battery cells connected in series, a positive contactor to connect the battery string to the load bus, and a pre-charge contactor to connect the battery string to the pre-charge circuit. The control circuit selects a battery string to pre-charge the DC link, closes the pre-charge contactor of the battery string to connect the selected battery string to the pre-charge circuit, and opens the pre-charge contactor of the selected battery string to disconnect the battery string from the pre-charge circuit and close the positive contactor of the selected battery string to connect the battery string to the load bus when the DC link is pre-charged.