Battery Pack Housing Corner Spacing Design
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Solution Overview
Problem
Battery packs face challenges in preventing electrical and physical interference between battery cells and their housings, particularly at corner positions vulnerable to external impact, which can lead to insulation breakdown and physical damage.
Innovation Solution
A battery pack design featuring a housing with concavely recessed spacing portions on both the bottom and side walls to create gaps between the battery cells and the housing, along with a side bar for additional support and insulation, effectively spacing the cells apart and reducing contact points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the battery cell is placed in direct contact with the housing at corner positions, then the structural support and stability are improved, but electrical and physical interference occurs leading to insulation breakdown and potential damage
Solution Approach 1:
An insulating sheet is introduced as an intermediary component between the battery cell and the housing at corner positions. This mediator maintains the structural support function while preventing direct contact, thereby eliminating electrical interference and insulation breakdown risks.
Solution Approach 2:
The housing structure is segmented by introducing recesses at corner positions, which divide the continuous contact surface into separate zones. This segmentation allows the insulating sheet to be positioned in specific critical areas where interference occurs, providing targeted protection while maintaining overall structural integrity.
2Reliability
If spacing portions are recessed into the housing bottom and side walls, then insulation between battery cell and housing is improved, but device complexity increases
Solution Approach 1:
The spacing portions are merged directly into the housing structure by forming recesses during the housing manufacturing process. This integration eliminates the need for separate spacing components, reducing assembly steps and overall device complexity while maintaining the insulation function.
Solution Approach 2:
Instead of making the entire housing structure complex, the recesses are localized only at the corner positions where interference occurs. This local modification approach minimizes the impact on overall structural design while providing targeted insulation where needed.
Data Source
AI summary
A battery pack includes: a plurality of battery cells; and a housing providing an accommodation space configured to accommodate the plurality of battery cells and comprising a side wall and a bottom wall which are in contact with each other at a corner position that faces a corner position of each of the battery cells, the housing having a spacing portion which is concavely recessed at the bottom wall to space the corner position of the battery cell apart from the corner position of the housing.