Battery Housing Vent Valve Layout Against Bottom Impact Damage
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Solution Overview
Problem
The existing power storage devices face damage to the smoke exhaust valve due to impacts from below, as it is often positioned at the same level or below the lower surface of the power storage cell, leading to potential damage.
Innovation Solution
The smoke exhaust valve is positioned on a protruding portion or side wall above the lower surface of the power storage cell, with the bottom portion of the lower case disposed below it, thereby preventing impacts from below and minimizing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the smoke exhaust valve is positioned at the same level or below the lower surface of the power storage cell, then the device complexity is reduced, but the reliability deteriorates due to impact damage from below
Solution Approach 1:
The smoke exhaust valve is repositioned from a horizontal alignment with the lower surface to a vertical arrangement on the protruding portion, utilizing the vertical dimension to achieve both protection and functional effectiveness
2Reliability
If the smoke exhaust valve is positioned above the lower surface on a protruding portion, then the reliability is improved by suppressing impact damage, but the device complexity increases
Solution Approach 1:
The protruding portion serves dual functions: it positions the smoke exhaust valve above the lower surface for impact protection, and simultaneously provides a mounting structure for the valve, combining protective and functional roles in one element
Solution Approach 2:
The smoke exhaust valve is repositioned from a horizontal alignment with the lower surface to a vertical arrangement on the protruding portion, utilizing the vertical dimension to achieve both protection and functional effectiveness
Data Source
AI summary
In a power storage device, a smoke exhaust valve is disposed in a smoke exhaust space through which gas discharged from a gas exhaust valve of a power storage cell flows. A housing includes a bottom portion, a side wall portion extending upward from an outer peripheral edge of the bottom portion, and a protruding portion protruding from the side wall portion. The smoke exhaust valve is provided in the protruding portion and is disposed above a lower surface of the power storage cell.