<p>The present invention dissipates heat from the inside of a battery module having a battery pack housed therein. The present invention has a configuration wherein: a junction box is housed in a metallic shield case having the battery pack housed therein; a resin case of the junction box is mounted on the bottom wall of the shield case; a fan is attached to a wall of the shield case, and an air-releasing port for releasing air that has been circulated inside of the shield case is provided in a wall of the shield case; the case of the junction box is provided with a ventilation hole; and a part of the air flowed into the shield case is circulated inside of the case of the junction box.</p>
