Patent ID: 7307839

Claim:
An air ventilation structure for a portable power device in a natural convection mode, comprising: an output cord; and a stand, coupled to the output cord, for mounting a power module in a substantially vertical orientation, the stand having a base with a first vertical piece extending from the base to a first fin that extends substantially along the entire length of the stand and extends out from the base away from said module in a first direction, and having a second vertical piece extending from the base to a second fin that extends substantially along the entire length of the stand and extends out from the base away from said module in a second direction, the power module plugging into the stand defining a first gap along an edge of the first fin that is adjacent to the first side of the power module and extends substantially along the entire length of the stand and defining a second gap along an edge of the second fin that is adjacent to the second side of the power module and extends substantially along the entire length of the stand, the stand allowing vertical heat dissipation generated by the power module with air flow vertically through the first and second gaps and along respective substantially vertical surfaces of said power module.