NOVELTY - A battery circuit (60) comprises battery (12) consists of positive terminal and negative terminal, positive high voltage bus line (16) electrically coupled to positive terminal of battery, negative high voltage bus line (18) electrically coupled to negative terminal of battery, resistor (64) consists of 1st end electrically coupled to positive high voltage bus line and 2nd end electrically coupled to negative high voltage bus line, 1st switch electrically coupled between 2nd end of resistor and positive high voltage bus line, and 2nd switch.    USE - A battery circuit for electric vehicle (claimed).    ADVANTAGE - Damage to capacitor, switches, and other electrical components is prevented, resistor provides both heating function and pre-charge function, number of components, cost, and weight of system are reduced, and reliability of pre-charging is increased.    DETAILED DESCRIPTION - A battery circuit (60) comprises battery (12) consists of positive terminal and negative terminal, positive high voltage bus line (16) electrically coupled to positive terminal of battery, negative high voltage bus line (18) electrically coupled to negative terminal of battery, resistor (64) consists of 1st end electrically coupled to positive high voltage bus line and 2nd end electrically coupled to negative high voltage bus line, 1st switch electrically coupled between 2nd end of resistor and positive high voltage bus line, and 2nd switch electrically coupled between 2nd end of resistor and negative high voltage bus line. Resistor separately provides pre-charging operation and heating operation for heating battery, where resistor is part of electric heater, 1st switch is closed and 2nd switch is opened to provide pre-charging operation, and 2nd switch is closed and 1st switch is opened to provide heating operation.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of a battery circuit for electric vehicle that employs single resistor which provides pre-charge function and heating function.    Battery (12)    Positive high voltage bus line (16)    Negative high voltage bus line (18)    Battery circuit (60)    Resistor (64)