| 摘要 |
<p>In the present invention, when the inner pressure of a case chamber increases due to the generation of a gas, the gas inside the chamber is discharged through the separation opening of a fragile bond part. In a vehicle battery pack with a battery module (2) arranged on a lower frame (11) of the battery pack, an upper cover (12) of the battery pack is joined and fixed to the lower frame (11) of the battery pack via a strong adhesive seal member (81) and a weak adhesive seal member (82) continuing along respective outer peripheral edges (11a, 12a) over the entire circumference. A step-like deformation part (83) having a difference in height at least in the height direction is provided on the upper cover (12) of the battery pack, and a fragile bond part (84) having a bond strength less than other bond parts is set over the region corresponding to the step-like deformation part (83) of the strong adhesive seal member (81) and the weak adhesive seal member (82) continuing over the entire circumference.</p> |
