Spaced Battery Cell Assembly for Heat and Pressure Control
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Solution Overview
Problem
Lithium secondary batteries face challenges in suppressing temperature rises and pressure-related damage during charging and discharging, leading to potential fires and structural instability.
Innovation Solution
A battery assembly design featuring heat transfer parts and a filler system that applies uniform surface pressure and manages temperature, with heat transfer parts between battery cells and an accommodation case, and a filler that acts as a coolant to prevent excessive temperature and pressure deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery cells are directly accommodated in the case without spacing, then device complexity is reduced, but temperature rise and pressure damage occur leading to safety issues
Solution Approach 1:
Heat transfer parts are introduced as intermediary components between battery cells and the accommodation case. These parts serve multiple functions: they prevent direct contact that causes pressure damage, facilitate heat dissipation from battery cells, and maintain proper spacing. The mediator approach resolves the contradiction by adding functional complexity that ultimately improves safety while managing the necessary structural complexity.
Solution Approach 2:
The accommodation case is segmented into multiple functional zones including heat transfer parts, filling parts, and pressing parts. This segmentation allows each component to perform its specific function optimally - heat transfer for thermal management, filling for spacing maintenance, and pressing for uniform pressure application - thereby improving overall safety through specialized functional decomposition.
2Temperature
If heat transfer parts are added between battery cells, then temperature control is improved, but device complexity increases
Solution Approach 1:
The heat transfer parts are designed to perform multiple functions simultaneously: thermal conduction away from battery cells, mechanical spacing maintenance, and structural support. This multi-functionality reduces the need for separate dedicated components for each function, thereby improving temperature control while minimizing the increase in device complexity.
Solution Approach 2:
The heat transfer parts are merged with the accommodation case structure, forming an integrated thermal management system. The heat transfer parts are positioned to directly contact both the battery cells and the case, creating a unified structure that combines thermal management and mechanical support functions, thus improving temperature control without proportionally increasing complexity.
3Stability of the object's composition
If uniform pressure is applied to battery cells, then structural stability is improved, but device complexity increases due to pressing mechanisms
Solution Approach 1:
The pressing mechanism is designed to apply pressure locally at critical points where battery cells contact the accommodation case, rather than requiring a complex system to pressurize the entire assembly uniformly. The filling parts and pressing parts are strategically positioned to create localized pressure zones that collectively achieve uniform distribution, improving structural stability while minimizing mechanism complexity.
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 suppresses temperature rises and applies uniform pressure, enhancing the structural stability and preventing damage to lithium secondary batteries by maintaining battery cells in a spaced configuration, thus improving safety and performance.
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
Implementation Method 2
a filler that acts as a coolant to prevent excessive temperature and pressure deviations
Data Source
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.