Patent ID: 9048669
Filing Date: 2015-06-02
Classification: H02J,Y02E,Y02T

Abstract:
1. An intelligently controllable charge equalization apparatus for a battery string connected in series, comprising: a battery module having a plurality of batteries connected in series; a battery string having M battery modules connected in series, wherein M is a natural number of 2 or more; a single voltage sensing module sensing voltage of each battery of the battery string; a single charge equalizing module that is connected to the voltage sensing module in parallel and charges or discharges each battery of the battery string; a bidirectional switch block that is included in each battery module and forms a parallel current path in each battery of the battery module; a module switch forming a current path between the bidirectional switch block and at least one of the voltage sensing module and the charge equalizing module; and a microprocessor determining charge or discharge of the battery by receiving a voltage value measured in the voltage sensing module and controlling the bidirectional switch block and the module switch, wherein each battery of the battery string shares the voltage sensing module and the charge equalizing module by the bidirectional switch block and the module switch; and wherein the bidirectional switch block of the battery module that includes k batteries includes 2 k bidirectional Metal Oxide Semiconductor Field Effect Transistor (MOSFET) switches, wherein k is a natural number of 2 or more, and on the basis of one battery of the battery module, the bidirectional MOSFET switches are respectively connected to both ends of a cathode and an anode of one battery to form the parallel current path.