Battery Pack Metal Frame Heat Dissipation for Corner Cells
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In battery packs with cylindrical cells arranged in a log pile configuration, corner cells have fewer heat transfer paths, leading to abnormal temperature increases and potential heat chains due to reduced heat dispersion.
Innovation Solution
A metal frame is placed along the periphery of the cell group, contacting corner cells to enhance heat transfer and prevent temperature abnormalities by radiating heat away from adjacent cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If cells are arranged in log pile configuration with minimal clearances, then energy density is increased, but corner cells have fewer heat transfer paths leading to abnormal temperature increases
Solution Approach 1:
A metal frame is introduced as an intermediary heat dissipation component that contacts corner cells directly. The metal frame acts as a heat sink and conduction path, absorbing excess heat from corner cells and transferring it to the surrounding structure, thereby preventing abnormal temperature increases while maintaining the compact log pile cell arrangement.
Solution Approach 2:
The cooling solution is applied locally only to corner cells rather than uniformly across all cells. The metal frame is positioned specifically at corner locations where heat dissipation is most critical, providing targeted heat management without compromising the overall energy density of the battery pack.
2Quantity of substance
If cells are arranged in log pile configuration, then energy density is increased, but heat chain incidents may occur due to reduced heat transfer paths from corner cells
Solution Approach 1:
The metal frame serves as a protective intermediary between corner cells and adjacent cells, providing an additional heat transfer path that interrupts potential heat chain propagation. By absorbing and redirecting heat away from adjacent cells, the metal frame enhances the reliability and safety of the battery pack.
Solution Approach 2:
The metal frame provides preemptive heat management by establishing heat transfer paths before abnormal temperature conditions occur. This preventive measure ensures that even if corner cells generate excessive heat, the metal frame is already in position to conduct and dissipate the heat, preventing heat chain incidents before they can propagate.
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
The metal frame effectively suppresses heat chain incidents and increases energy density by providing additional heat transfer paths for corner cells, preventing overheating and fire spreading.
Implementation Method 1
the heat is transferred from the cell to the metal frame
Data Source
AI summary
A battery pack includes: a cell group including a plurality of cylindrical cells that are arranged in a manner of log pile in contact with each other; and a metal frame that extends along the periphery of the cell group and surrounds the cell group. The cells located at the corners of the cell group that has a substantially rectangular shape when viewed from an end surface side in the axial direction of the cells, are in contact with the metal frame.