Battery Cell Holder Layout for Secure Fixing and Heat Dissipation
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Solution Overview
Problem
Existing battery packs face challenges in achieving a secure fixing force for battery cells and effective heat dissipation, particularly in high-power applications like electric vehicles.
Innovation Solution
The battery pack design includes a holder portion that fixes both the bottom and side portions of the battery cells, along with a cooling unit and a filling portion that enhances heat dissipation by covering exposed parts of the battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a holder portion fixes only the bottom portion of battery cells, then the structure is simple, but the fixing force is insufficient
Solution Approach 1:
The holder portion is divided into multiple functional segments: a bottom holder portion for fixing the bottom of battery cells, and side holder portions for fixing the sides of battery cells. This segmentation allows each part to perform its specific fixing function independently, achieving strong overall fixing force while maintaining reasonable structural complexity.
Solution Approach 2:
The fixing structure transitions from a single-dimensional bottom-fixing approach to a multi-dimensional approach by adding side-fixing components. The side holder portions extend horizontally to contact the sides of battery cells, creating a three-dimensional fixing network that significantly enhances fixing force.
2Temperature
If the holder portion is solid without openings, then structural strength is high, but heat dissipation performance is poor
Solution Approach 1:
The holder portion incorporates opening portions that create a porous or lattice-like structure. These openings allow heat to pass through the holder portion more effectively, improving heat dissipation performance. The strategic placement of openings maintains structural integrity while enabling thermal management.
3Strength
If multiple holder portions are added to fix side portions, then fixing force improves, but device complexity increases
Solution Approach 1:
Multiple holder portions (bottom holder portion and side holder portions) are merged into a single integrated holder structure. This unified design achieves strong multi-point fixing force while avoiding the complexity of separate components, as the holder portions work together as one cohesive assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design achieves a stable fixing force for the battery cells and improves heat-dissipating performance, ensuring reliable operation in high-power applications.
Implementation Method 1
a cooling unit under the holder portion to cool the battery cells
Implementation Method 2
a structure in which an opening portion is formed in a holder portion fixing a battery cell achieves excellent heat-dissipating performance
Data Source
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AI summary
A battery pack (10) includes battery cells (300), a housing (100) accommodating the battery cells, a bus bar (400) electrically connecting the battery cells, (300) a holder portion (200) fixing a bottom portion and a side portion of the battery cells, a cooling unit (110) under the holder portion (200) to cool the battery cells, and a filling portion (210) contacting a surface portion of the battery cells between the plurality of battery cells and the cooling unit. The filling portion (210) covers at least part of the bottom portion (301) of the battery cells and at least part of the side portion (302) of the battery cells.