| 摘要 |
A battery pack unit according to an embodiment of the present invention includes a virtual includes a battery pack having a battery cell unit installed therein, an air inlet through which air for cooling the battery cell unit is input and an air outlet through which the air used for cooling the battery cell unit is output; an absorbing duct communicating with the air inlet and for guiding the air for cooling the battery cell unit to the air inlet; a discharging duct communicating with the air outlet and for guiding the air discharged into the air outlet; and a virtual audio generating device installed in the discharging duct, for generating a virtual engine sound and for allowing air to be discharged into the atmosphere, wherein the virtual audio generating device includes an air flowing part for generating an air flow and for allowing the air to be discharged to the atmosphere after the air passes through the absorbing duct, the battery pack and the discharging duct in sequence; an air accelerating part in which the air flow generated from the air flowing part is accelerated when the air flow is input thereto; a discharge guiding part communicating with the air accelerating part and for guiding the accelerated air in the air accelerating part to be discharged to the atmosphere; and a sound generating part installed in the discharge guiding part and for generating the sound having a specific wavelength by the air passing through the discharge guiding part. Thus, the battery pack unit can generate a virtual engine sound in spite of a simple structure. |
