Patent 10085359 was granted and assigned to Panasonic on September, 2018 by the United States Patent and Trademark Office.
In an electric device housing rack, cooling air drawn in by an air inlet from outside of a casing is guided to a first housing and a second housing by a flow divider, and then the cooling air passes through a ventilation opening and inside of a secondary battery module via a heat vent, whereby the secondary battery module is cooled.