Battery Cell Assembly With Heat Transfer Parts for Swelling Control
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Solution Overview
Problem
Lithium secondary batteries face challenges in suppressing temperature rises and external pressure, leading to potential fires and damage due to swelling during charging and discharging.
Innovation Solution
A battery assembly design featuring a plurality of battery cells stacked with heat transfer parts and a filler, where the cells are spaced apart from the accommodation case surfaces, and a busbar assembly for electrical connection, to manage temperature and apply uniform pressure, preventing excessive temperature and pressure-induced damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If battery cells are placed in direct contact with the accommodation case, then structural stability is improved, but temperature management and pressure distribution deteriorate
Solution Approach 1:
Heat transfer parts are introduced as intermediary components between the battery cells and the accommodation case. These heat transfer parts serve as mediators that facilitate thermal energy transfer from the battery cells to the accommodation case, improving temperature management while maintaining structural stability through the intermediary thermal conduction path
2Stability of the object's composition
If battery cells are placed in direct contact with the accommodation case, then structural stability is improved, but pressure distribution deteriorates
Solution Approach 1:
The heat transfer parts act as intermediary components that also facilitate uniform pressure distribution. By introducing these intermediate elements between the battery cells and the accommodation case, the pressure is distributed more evenly across the contact surfaces, preventing concentration of stress at specific points while maintaining overall structural stability
3Temperature
If heat transfer parts are introduced between battery cells and accommodation case, then temperature management is improved, but device complexity increases
Solution Approach 1:
The heat transfer parts are designed to perform multiple functions simultaneously: thermal conduction, mechanical support, and pressure distribution. By making these components multi-functional, the overall device complexity is minimized despite the addition of intermediate elements, as a single component replaces what would otherwise require multiple separate elements
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 solution effectively stabilizes the battery assembly by uniformly managing temperature and pressure, preventing damage and enhancing structural stability, suitable for green technologies like electric vehicles and solar power generation.
Implementation Method 1
one or more heat transfer parts which are located between the plurality of battery cells and in contact with a first surface and a second surface opposite to the first surface of the accommodation case
Data Source
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AI summary
A battery assembly of the present disclosure may include a plurality of battery cells stacked in a preset stacking direction, an accommodation case which accommodates the plurality of battery cells therein, and one or more heat transfer parts which are located between the plurality of battery cells and in contact with a first surface and a second surface opposite to the first surface of the accommodation case, wherein the plurality of battery cells may be positioned to be spaced apart from the first surface and the second surface.