Battery Pack Lower Case Support for Smoke Exhaust Rigidity
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Solution Overview
Problem
The member forming the smoke exhaust space below a power storage device is prone to damage when the device interferes with a road surface and experiences a load from below, leading to potential deformation and reduced rigidity.
Innovation Solution
The power storage device incorporates a lower case support plate with panel connection portions that press the share panel from above, enhancing its rigidity, and includes a blast collection portion and support members to stabilize the lower case, thereby preventing blast scattering and increasing overall rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power storage device is equipped with a smoke exhaust space below the cell, then the safety function is improved, but the rigidity of the forming member deteriorates under load from below
Solution Approach 1:
The lower case support plate serves as an intermediary component between the lower case and the share panel. It transfers loads from the lower case to the share panel through its panel connection portion, preventing direct transmission of harmful loads to the share panel while maintaining the smoke exhaust space structure. This mediator structure resolves the contradiction by protecting the share panel from excessive deformation.
2Device complexity
If the share panel forms the smoke exhaust space directly, then the device complexity is reduced, but the stability under load deteriorates
Solution Approach 1:
The support structure is segmented into distinct functional components: the lower case support plate for load bearing and the share panel for forming the smoke exhaust space. This segmentation allows each component to perform its specific function optimally - the support plate handles mechanical loads while the share panel maintains the exhaust space geometry, thereby improving stability without excessive complexity.
3Strength
If the lower case support plate is added to support the lower case, then the rigidity against load from below is improved, but the device complexity increases
Solution Approach 1:
The lower case support plate performs multiple functions simultaneously: it supports the lower case, forms part of the smoke exhaust space structure, and provides a mounting surface for the share panel. By making this single component multi-functional, the design achieves improved rigidity without proportionally increasing overall device complexity.
Data Source
AI summary
In a power storage device, a smoke exhaust hole positioned to overlap a safety valve of a power storage cell is formed in a bottom plate of a lower case. A support unit includes a panel connection portion connected to a share panel. The panel connection portion is disposed below the power storage cell.