ENERGY-STORAGE LITHIUM BATTERY PACK, AND CAPACITY EXPANSION METHOD FOR SAME

Abstract(summary):

An energy-storage lithium battery pack, comprising a casing, multiple batteries connected in series within the casing, a battery management module, a current-limiting module, a charging switch, a discharging switch, an air switch, a start-up switch, a communication connection port, and a power connector. The charging switch and discharging switch achieve control of charging and discharging of the batteries. The start-up switch and communication connection port are connected to the battery management module. The power connector connects positive and negative electrodes of the batteries. The current limiting module achieves a balance of a current of the lithium battery pack. The air switch provides secondary over-current protection to the lithium battery pack. The energy-storage lithium battery pack of the present invention can be used independently, and multiple battery packs can be connected in series to expand the capacity. In a series connection configuration, a host is automatically configured to communicate and interact with an upper level controller, and voltage consistency across the multiple battery packs is achieved by means of controlling the charging and discharging switches to be on or off, thus preventing a loop current, and preventing the battery packs from being damaged by an over-current condition.