BATTERY PACK

摘要

A battery pack has a sealed case. Battery modules are accommodated in the sealed case. An opening in the main body is closed by a rectangular plate-shaped lid member. The lid member has a releasing portion and a joint portion. When the internal pressure of the sealed case increases, the lid member is deformed away from an opening edge of the opening. This discharges gas from the sealed case through the releasing portion. In addition, the joint between the joint portion and the opening edge is maintained even when the internal pressure of the sealed case increases, deforming the releasing portion, and the gas inside the sealed case starts to be discharged. A protrusion of a rib is provided between the releasing portion and the joint portion.

主权项

1. A battery pack comprising:
a sealed case, which includes a main body having an opening, and a lid member, which is provided at an opening edge defining the opening and closes the opening; and a battery cell, which is accommodated in the sealed case, wherein the lid member has a releasing portion and a joint portion, when an internal pressure of the sealed case increases, the lid member is deformed away from the opening edge so that gas is discharged from the sealed case through the releasing portion, even when the internal pressure of the sealed case increases and the releasing portion is deformed to start discharging the gas from the sealed case, joint between the joint portion and the opening edge is maintained by a joint member, and a reinforcing portion, which reinforces the lid member, is provided between the releasing portion and the joint portion.