Battery protection circuit module and method of protecting battery using the same

A battery protection circuit module comprising:

• a first IC disposed relatively closely to an output stage;
• a first field effect transistor (FET) connected to a first integrated circuit (IC) ;
• a first shunt resistor connected to the first IC and the first FET;
• a second IC disposed relatively closely to an input stage;
• a second FET connected to the second IC;
• a second shunt resistor connected to the second IC and the second FET;
• and
• a voltage comparator disposed at a preset node in order to prevent an overcharging prohibition-related malfunction attributable to impedance of the second FET and the second shunt resistor.

A method of protecting a battery, which is performed by a battery protection circuit module, the method comprising steps of:

• (a) starting a voltage difference reduction design related to an overvoltage prohibition malfunction;
• (b) determining at least any one of a node at which a shunt resistor is disposed and a node at which a voltage comparator is disposed within the battery protection circuit module;
• and
• (c) disposing the battery protection circuit module comprising the shunt resistor or the voltage comparator and preventing the overvoltage prohibition malfunction.