Battery pack

Abstract

To provide a battery pack that can be filled with a filling member for restricting the lateral displacement of a power storage device up to a position higher than the position of a joint portion between a lower case and an upper case.SOLUTION: A battery pack that includes a lower case and an upper case and accommodates a power storage device therein has a joint portion for joining the lower case and the upper case to each other, the lower case and the upper case facing each other in a first direction. The joint portion is located so as to overlap with the power storage device as viewed in a second direction perpendicular to the first direction, and the lower case has a partition wall arranged to surround the periphery of the power storage device. The partition wall protrudes toward the upper case side in the first direction beyond the joint portion, and a filling member is filled between the partition wall and the power storage device up to the upper case side in the first direction beyond the joint portion.SELECTED DRAWING: Figure 1

Claims

1. A battery pack comprising a lower case and an upper case, which houses an energy storage device, The lower case and the upper case face each other in a first direction. It has a joint that connects the lower case and the upper case, The joint is positioned such that it overlaps with the energy storage device when viewed from a second direction perpendicular to the first direction. The lower case has a partition wall arranged to surround the energy storage device. The partition wall protrudes from the joint portion toward the upper case in the first direction, Between the partition wall and the energy storage device, a filling member made of a material that is initially liquid and hardens over time is filled from the joint portion toward the upper case side in the first direction. The partition wall protrudes from the energy storage device toward the upper case in the first direction, Between the partition wall and the energy storage device, the filling member is filled to the upper case side in the first direction from the energy storage device. The lower case has a bottom portion and a side portion, The partition wall is formed from the side portion toward the upper case side in the first direction, The partition wall has a first partition wall portion and a second partition wall portion. The second partition wall portion extends from the bottom surface portion side in the first direction of the side surface portion, more so than the first partition wall portion. A liquid reservoir is provided between the second partition wall and the side surface. The aforementioned liquid reservoir is equipped with a water ingress detection device. A battery pack characterized by the following features.

2. The battery pack according to claim 1, characterized in that the partition wall has an elastic member on the surface located on the upper case side.

Images