Battery Pack Case Structure for Space-Efficient Module Fixing
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Solution Overview
Problem
Conventional battery packs inefficiently utilize space due to the occupation of the joint part for welding the support wall to the side wall, limiting internal space utilization.
Innovation Solution
A battery pack design featuring a pack case with a side wall that includes an insertion groove for a protruding coupling part of the support wall, allowing for secure welding without occupying additional space, and a reinforcement plate with a protrusion for stable module fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a battery pack is designed to fit into a limited space, then the volume is reduced, but the heat dissipation capability deteriorates
Solution Approach 1:
The patent transitions from planar heat dissipation to three-dimensional heat dissipation by positioning heat dissipation fins on the top surface of the battery pack. This vertical arrangement allows heat to dissipate in multiple directions (upward, sideways) rather than being constrained to a flat plane, enabling effective thermal management in a compact volume.
Solution Approach 2:
The heat dissipation fins are integrated into the battery pack structure itself, with fins positioned on the top surface and extending between battery modules. This nesting approach embeds the heat dissipation system within the existing battery pack architecture rather than adding separate external cooling components, reducing overall volume while maintaining thermal performance.
2Quantity of substance
If battery modules are arranged to maximize space utilization, then the energy density increases, but the heat accumulation worsens
Solution Approach 1:
The patent applies different structural characteristics to different regions of the battery pack. Heat dissipation fins are strategically positioned in specific locations (on the top surface, between modules) where heat accumulation is most problematic, while maintaining dense battery module arrangement in other areas. This localized approach addresses heat issues without compromising overall energy density.
Solution Approach 2:
The battery pack is divided into multiple modules with heat dissipation fins positioned between them. This segmentation creates thermal zones that allow heat to dissipate locally between modules rather than accumulating throughout the entire pack, enabling closer module spacing while managing thermal loads.
3Volume of moving object
If a compact battery pack design is implemented, then the portability improves, but the cooling efficiency deteriorates
Solution Approach 1:
The cooling system utilizes the vertical dimension by positioning fins on the top surface of the battery pack. This three-dimensional heat dissipation approach compensates for the reduced horizontal spacing in compact designs, maintaining cooling efficiency despite smaller overall pack dimensions.
Solution Approach 2:
Heat dissipation fins act as intermediary structures between the battery modules and the external environment. These fins provide an extended surface area for heat transfer, mediating the thermal interaction between the compact battery components and ambient air, thereby maintaining cooling efficiency in a reduced volume.
Data Source
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AI summary
Disclosed herein relates to a battery pack for accommodating battery modules. More specifically, the battery pack of the present invention includes a pack case including a module area where the battery module is seated, wherein the pack case includes: a base plate; a side wall coupled along the perimeter of the base plate; and a support wall coupled to an inner surface of the side wall, wherein the support wall includes a coupling part protruding in a ribbed shape on one side opposite the side wall, and the side wall includes an insertion groove recessed for insertion of a coupling part of the support wall on the inside.