Battery module and operation method thereof

A battery module, comprising:

• a plurality of battery cells connected in parallel during a discharging operation, each having a power voltage terminal and a reference voltage terminal, wherein the power voltage terminals of the battery cells are commonly coupled to a power voltage line of the battery module, the reference voltage terminals of the battery cells are commonly coupled to a reference voltage line of the battery module, and electrical energy of the power voltage line and the reference voltage line is used to supply power to a load system outside the battery module;
• a controller, coupled to the power voltage line and the reference voltage line, and used to monitor a charging operation and the discharging operation of the battery cells,
• wherein the reference voltage line is coupled to a reference voltage bus bar of the load system through a reference voltage electrode of the battery module;
• and
• a voltage regulating circuit, having a first terminal and a second terminal respectively coupled to the power voltage line and a power voltage electrode of the battery module, wherein the power voltage electrode is used to couple to a power voltage bus bar of the load system.