Battery pre-heating apparatus for hybrid vehicle and control method therefor

A control method of a battery pre-heating apparatus for hybrid electric vehicle, the method comprising:

• determining whether a temperature of a battery is within a hybrid operable range;
• exciting a pre-heating relay to allow being turned on, the pre-heating relay being connected to between a first main relay of a power relay assembly, which is one of circuit elements inside a battery pack and a pre-heater, when the temperature of battery is in a low temperature state of being less than the hybrid operable range;
• supplying a power generated from a motor in response to regenerative braking of a hybrid electric vehicle to the pre-heater through the pre-heating relay;
• and
• heating each battery cell inside the battery pack to a predetermined temperature in response to operation of heated pre-heater, wherein the pre-heater includes at least one plane heater formed through a heat generating paste composition, and wherein the heat generating paste composition includes a carbon nano tube particle 3˜6 parts by weight, a carbon nanoparticle 0.5˜30 parts by weight, a mixed binder 10˜30 parts by weight, an organic solvent 29˜83 parts by weight and a dispersant 0.5˜5 parts by weight, against a heat generating paste composition 100 parts by weight, and wherein the mixed binder is mixed with epoxy acrylate, polyvinyl acetal, and phenolic resin and wherein the mixed binder is mixed with weight ratio of polyvinyl acetal 10˜150:phenolic resin 100˜500:epoxy acrylate 100.