Battery Pack with Ventilation Ports for Heat Dissipation
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Solution Overview
Problem
Existing battery packs face challenges in efficiently dissipating heat generated during high current charging and discharging, particularly when unit cells are densely packed, which hinders reliable operation and assembly efficiency.
Innovation Solution
The battery pack design integrates a first and second external case with cylindrical battery storage sections that sandwich unit cells, providing a gap for improved heat radiation, and incorporates thermal conductivity panels and ventilation ports for enhanced cooling, while eliminating the need for a separate battery holder, thus reducing components and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If unit cells are densely packed to increase capacity, then the battery pack size is reduced, but heat radiation becomes difficult
Solution Approach 1:
The patent introduces ventilation ports at the top and bottom of the external case, creating a three-dimensional heat dissipation pathway. Air flows through the battery pack from bottom to top, cooling unit cells from multiple directions rather than just lateral surfaces, thus enabling effective heat radiation even with dense packing
2Ease of manufacture
If a separate battery holder is used to retain unit cells, then assembly is simplified, but the number of components and weight increase
Solution Approach 1:
The patent merges the battery holder function with the external case by integrating unit cell retention features directly into the case structure. The external case includes internal ribs and positioning structures that retain unit cells without requiring a separate battery holder component, thus reducing component count and weight while maintaining assembly simplicity
3Temperature
If unit cells are arranged to improve heat radiation with gaps, then cooling efficiency increases, but the battery pack volume increases
Solution Approach 1:
The patent utilizes vertical airflow through top and bottom ventilation ports to cool unit cells, eliminating the need for lateral gaps between cells. Air flows through the entire battery pack volume, cooling cells from top, bottom, and sides simultaneously, achieving effective heat radiation without increasing horizontal spacing
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 improves heat radiation efficiency, simplifies assembly, reduces weight and costs, and enhances cooling capacity by allowing direct heat dissipation from both end and side surfaces of the unit cells.
Implementation Method 1
a gap GP can be provided between the battery storage sections 13 that are adjacently disposed
Implementation Method 2
improve heat radiation of the unit cells 11
Implementation Method 3
incorporates thermal conductivity panels and ventilation ports for enhanced cooling
Data Source
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AI summary
It is aimed at simplifying an assembly operation of a battery pack while providing a constitution in which heat generation components are efficiently cooled. Solution to Problem A battery pack 100 includes a plurality of unit cells 11 whose exterior is extended in one direction and formed in an approximately cylindrical shape, a first external case 12A whose external shape is formed in an approximately rectangular shape, and in which a plurality of approximately cylindrical battery storage sections 13 that individually store the plurality of unit cells 11 are provided on an inner surface, and a second external case 12B which is configured to include the battery storage sections 13 that individually store the plurality of unit cells 11 on an inner surface, join the first external case 12A, and hold the unit cells 11 in such a manner as to sandwich the unit cells 11 between both sides in a longitudinal direction, and the second external case 12B whose external shape is formed in an approximately rectangular shape, and in which a gap GP is provided between the battery storage sections 13 that are adjacently disposed.