Patent ID: 8631890

Claim:
An electric construction machine in which a battery storage room is formed in a rear part of a swing structure and a plurality of batteries as electric power sources are arranged in the battery storage room, comprising: a battery storage structure storing the batteries and having an air flow channel through which air can flow upward from a lower part of the battery storage structure; a flexible covering sheet entirely covering the top and side faces of the battery storage structure; and a duct for discharging the air, one end of which is arranged in an upper part of the covering sheet, wherein the swing structure includes two rear beams extending in the longitudinal direction of the swing structure in a rear part thereof and mounting the battery storage structure thereon, and wherein the battery storage structure includes plural stages of battery tables each having a plurality of air vents and storing and holding the batteries in multiple stages in the vertical direction and in multiple columns in the transverse direction of the swing structure, the two rear beams forming a space therebetween for taking in air and the plurality of air vents forming an air flow channel through which air flows upwards from the lowermost stage to the uppermost stage.