Battery Pack Case Protrusions for Cell Impact Protection
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Solution Overview
Problem
Battery packs face the challenge of reducing impact on battery cells from external members around the battery case, which can cause damage and stress on the cells.
Innovation Solution
The battery pack design incorporates protrusions and ribs on the battery case to absorb and distribute impact loads, positioning the cells effectively and enhancing structural stiffness, thereby reducing the direct impact on the cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the battery case has a simple structure without protrusions, then the device complexity is low, but the impact protection capability is insufficient
Solution Approach 1:
The first protrusion is provided on the outer surface of the battery case at positions corresponding to gaps between adjacent battery cells before any impact occurs. This preliminary structural arrangement enables the case to actively intervene and reduce impact forces transmitted to the battery cells when external impacts occur, without requiring complex active protection systems.
Solution Approach 2:
The battery case is segmented with multiple first protrusions positioned at specific locations corresponding to gaps between battery cells. This segmentation allows the case to provide localized impact protection at critical areas where impacts are most likely to affect the battery cells, rather than requiring a uniformly complex structure throughout.
2Object-affected harmful factors
If protrusions are added to the battery case to reduce impact, then the impact protection capability is improved, but the device complexity increases
Solution Approach 1:
The first protrusion is provided on the outer surface of the battery case at positions corresponding to gaps between adjacent battery cells before any impact occurs. This preliminary structural arrangement enables the case to actively intervene and reduce impact forces transmitted to the battery cells when external impacts occur, without requiring complex active protection systems.
Solution Approach 2:
The battery case is segmented with multiple first protrusions positioned at specific locations corresponding to gaps between battery cells. This segmentation allows the case to provide localized impact protection at critical areas where impacts are most likely to affect the battery cells, rather than requiring a uniformly complex structure throughout.
Data Source
AI summary
The battery pack includes a cell stack and a battery case. The cell stack is formed by stacking a plurality of battery cells having a substantially rectangular parallelepiped shape. The battery case is formed in a substantially rectangular parallelepiped shape and accommodates the cell stack. The battery case includes a first protrusion protruding from an outer surface of the battery case to an outside of the battery case at a position of a gap between adjacent battery cells in a stacking direction of the cell stack.