Electrode Assembly Heat Transfer Layer for Lower Temperature Deviation
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Solution Overview
Problem
Secondary battery electrode assemblies experience significant temperature deviations due to uneven heat distribution, which can adversely affect performance and lifespan.
Innovation Solution
Incorporating a heat transfer layer with high thermal conductivity, such as graphite, between the electrodes and separators in the electrode assembly to disperse heat generated at high temperature points to lower temperature points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a cooling plate is attached to only one side surface of secondary batteries, then the cooling structure is simple, but temperature deviation occurs in the electrode assembly
Solution Approach 1:
The patent applies local quality by introducing a heat transfer layer with high thermal conductivity specifically at locations where heat accumulates (between electrodes and separators). This localized enhancement of thermal conductivity addresses the temperature deviation problem without requiring complex cooling structures, as the heat transfer layer actively manages heat distribution at critical points within the electrode assembly.
2Use of energy by moving object
If heat is generated during charging and discharging, then energy storage capacity increases, but heat adversely affects lifespan and performance
Solution Approach 1:
The patent converts the harmful effect of heat generation into a beneficial outcome by using the heat transfer layer to redirect and utilize the generated heat. Instead of allowing heat to accumulate and damage the battery, the high thermal conductivity material distributes the heat evenly throughout the electrode assembly, transforming a potentially harmful byproduct into a manageable thermal profile that maintains performance and extends lifespan.
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 heat transfer layer effectively reduces temperature deviations within the electrode assembly, enhancing the reliability and performance of the secondary battery by improving heat dissipation and cooling efficiency.
Implementation Method 1
a heat transfer layer made of a material having thermal conductivity greater than that of the separator and stacked between the positive electrode and the separator or between the negative electrode and the separator to disperse heat generated at a relatively high temperature point to a relatively low temperature point
Data Source
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AI summary
An electrode assembly, in which positive electrodes, separators, and negative electrodes are repeatedly stacked, and a positive electrode tab, through which the positive electrodes are connected to each other, and a negative electrode tab, through which the negative electrodes are connected to each other, are provided, according to the present invention comprises: a heat transfer layer made of a material having thermal conductivity greater than that of the separator and stacked between the positive electrode and the separator or between the negative electrode and the separator to disperse heat generated at a relatively high temperature point to a relatively low temperature point. According to the present invention, the heat generated at the relatively high temperature point may be dispersed to the relatively low temperature point to reduce the temperature deviation within the electrode assembly.