Battery Module Case Protrusions to Limit Cell-to-Cell Heat Transfer
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Solution Overview
Problem
In conventional battery modules, heat generated by one battery is transferred to adjacent batteries through intervening members, leading to increased temperatures of adjacent batteries.
Innovation Solution
A power storage device module is designed with power storage devices having a metal case with a contact part featuring numerous protrusions, reducing the contact area with intervening members and minimizing heat transfer to adjacent devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the contact part of the case outer surface is made flat without protrusions, then the contact area with the intervening member is large, but this causes excessive heat conduction to adjacent power storage devices
Solution Approach 1:
The contact part of the case outer surface is given a localized protrusion structure specifically at the regions contacting the intervening members. This local modification reduces the contact area precisely where heat transfer occurs, while leaving other parts of the case unchanged. The protrusions create point or line contact rather than surface contact, effectively reducing thermal conduction paths to adjacent power storage devices.
2Object-affected harmful factors
If the contact area between the case and intervening member is reduced by adding protrusions, then heat conduction is minimized, but the structural complexity of the case increases
Solution Approach 1:
The contact surface geometry is modified by changing the physical parameters of the contact part - specifically, transforming a flat surface into one with numerous protrusions. This parameter change (from flat to protruded) directly reduces the contact area with the intervening member, thereby minimizing heat conduction. The protrusions can be formed by various methods such as casting, molding, or mechanical processing, making the complexity manageable in manufacturing.
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 module effectively reduces heat conduction from the power storage devices to intervening members and prevents heat transfer to adjacent devices, thereby suppressing temperature rises in adjacent batteries.
Implementation Method 1
the heat conduction from the contact part of each power storage device to the intervening member is reduced as compared with when the contact part of each power storage device does not have the above-mentioned tip abutting part
Data Source
AI summary
A power storage device module includes a plurality of power storage devices arranged in a row, and an intervening member interposed between adjacent ones of the power storage devices. Each of the power storage devices includes an electrode body and a metal case that houses the electrode body. A case outer surface of the case includes a contact part, which contacts with the intervening member. This contact part includes a tip abutting part having numerous protrusions, whose tips abut on the intervening member with the intervening member with a reduced contact area.