Secondary Battery Cooling Interface With Tapered Heat Conductor
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Solution Overview
Problem
Conventional secondary battery designs with cooling plate members and heat conductive members do not achieve optimal cooling performance, leading to increased production costs due to unnecessary use of expensive heat-conducting materials.
Innovation Solution
A secondary battery design featuring a cell body member with a tapered portion and a heat conductive member that contacts the cooling plate member with a smaller cross-sectional area, optimizing heat transfer while minimizing material usage, with an effective contact area percentage between 30% to 70% and a thickness percentile ratio of 5% to 25%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional cooling plate member and heat conductive member are used with full contact area, then cooling performance is improved, but production cost increases due to excessive use of expensive heat-conducting materials
Solution Approach 1:
The heat conductive member is designed with a tapered structure where the cross-sectional area varies along its length. The contact area with the cooling plate is optimized to be smaller than the cell body cross-section, creating local quality variations that concentrate heat transfer pathways where most needed while reducing material usage in less critical areas.
Solution Approach 2:
The patent changes the geometric parameters of the heat conductive member by introducing a tapered portion with varying cross-sectional area. The contact area percentage is specifically controlled within 30-70% of the cell body cross-sectional area, optimizing the balance between cooling efficiency and material consumption.
2Loss of substance
If the contact area of the heat conductive member with the cooling plate is reduced, then material cost is reduced, but cooling performance deteriorates
Solution Approach 1:
The patent identifies and optimizes specific parameter ranges: the contact area percentage is set between 30-70% of the cell body cross-sectional area, and the thickness percentile ratio is set between 5-25%. These parameter changes achieve optimal cooling performance while minimizing material usage.
Solution Approach 2:
The tapered structure of the heat conductive member creates an optimized heat transfer pathway that copies the natural heat flow pattern from the cell body to the cooling plate, concentrating thermal conduction where temperature gradients are steepest while reducing material in regions with lower thermal demand.
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 enhances cooling performance while reducing material consumption, maintaining thermal resistance below 2.0 K/W and preventing overheating, thus optimizing the use of heat conductive materials and reducing manufacturing costs.
Implementation Method 1
a heat conductive member provided between the cell body member and the cooling plate member to form a heat path for transferring heat from the cell body member
Data Source
AI summary
A secondary battery may include a cell body member accommodating an electrode assembly therein; and a heat conductive member disposed between the cell body member and a cooling plate member to form a heat path for transferring heat from the cell body member, wherein the heat conductive member is in contact with the cooling plate member, and wherein a contact area of the cooling plate member and the heat conductive member is smaller than a cross-sectional area of the cell body member parallel to a thickness direction of the electrode assembly.