BATTERY MANAGEMENT SYSTEM AND SWITCHING METHOD THEREOF

摘要

An embodiment of the present invention provides a battery management system and a switching method thereof, which can prevent fusion of a relay by preventing arcing and voltage spikes when the relay is turned off (opened). To this end, the embodiment of the present invention provides a battery management system including one or more battery packs; a master battery management unit sensing voltages and/or currents of the battery packs; main relays connected between the battery packs and loads and turned on or off by the master battery management unit; and sub relays connected to the main relays in parallel, turned on or off by the master battery management unit and having resistors, wherein when switching occurs in which the main relays are turned off, the sub relays are first turned on and the main relays are then turned off.

主权项

1. A battery management system comprising:
a first main relay connected between a battery pack and a load; a first sub relay element comprising a first sub relay, the first sub relay element connected between the battery pack and the load in parallel with the first main relay; and a controller configured to control the first main relay and the first sub relay; the controller configured with the first main relay and the first sub relay element, when the battery pack is to be electrically disconnected from the load, to turn the first main relay off only when the first sub relay is turned on.