Stacked Battery Pack Fixing Layout With Venting Space
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Solution Overview
Problem
Battery packs with multi-stage stacking structures face increased risks of movement and detachment due to external impacts, and there is a need for a more stable fixing structure and a venting space to prevent chain ignition during thermal events.
Innovation Solution
A battery pack design featuring a pack case with integrated stack fixing portions and mounting guides that stabilize the cell array structures through case mounting portions, while also creating venting spaces between them to prevent chain ignition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a multi-stage stacking structure is used to increase battery capacity, then the charge/discharge capacity is improved, but the stability of the battery pack structure deteriorates due to increased movement risk and detachment risk from external impacts
Solution Approach 1:
The battery pack is divided into multiple cell array structures stacked in multi-stages, where each cell array structure is independently fixed to the pack case through case mounting portions. This segmentation allows high capacity while maintaining individual stability of each stack unit.
Solution Approach 2:
Multiple cell array structures are merged into a unified battery pack system with integrated fixing mechanisms. The case mounting portions of multiple cell array structures are collectively fixed to the pack case, combining the benefits of multi-stage stacking while maintaining overall structural stability through unified fixation.
2Stability of the object's composition
If case mounting portions are provided on multiple cell array structures to improve fixing stability, then the structural stability is improved, but the device complexity increases due to additional components and staggered arrangement requirements
Solution Approach 1:
The fixing structure is segmented into case mounting portions integrated into each cell array structure, which are then coupled to corresponding stack fixing portions on the pack case. This segmentation distributes the fixing function across multiple points, enhancing stability while maintaining modular simplicity.
Solution Approach 2:
The case mounting portions are integrated within the cell array structures themselves, with the stack fixing portions nested into the pack case. This nested arrangement allows multiple fixing points without adding external complexity, as the fixing mechanisms are embedded within the existing structural components.
3Volume of moving object
If cell array structures are closely stacked to maximize space utilization, then the volume efficiency is improved, but the safety deteriorates due to increased risk of chain ignition during thermal events
Solution Approach 1:
Cooling plates are introduced as intermediary components between adjacent cell array structures. These cooling plates serve as thermal barriers that prevent direct heat transfer between stacks, thereby reducing chain ignition risk while maintaining compact overall packaging through efficient space utilization.
Solution Approach 2:
Thermal management is applied locally at the interfaces between cell array structures through cooling plates. This local quality approach provides targeted thermal protection at critical heat transfer points without requiring uniform spacing throughout the entire battery pack, thus maintaining high volume efficiency while ensuring thermal safety.
Data Source
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AI summary
Disclosed is a battery pack having a stable fixing structure. The battery pack includes a pack case having a predetermined accommodation space; and a cell array stack including a plurality of cell array structures that are stacked in multi stages, the cell array stack having a case mounting portion fixed to at least one side wall of the pack case.