Battery Thermal Component With Deformable Ribs for Cell Swelling
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Solution Overview
Problem
Existing battery technologies face challenges in balancing thermal management performance and swelling space provision for battery cells, leading to stress concentration and reduced reliability.
Innovation Solution
A thermal management component with deformable connecting ribs and heat conducting plates is connected to the largest surface area of the battery cell, forming a flow channel for heat exchange medium, with specific ratios of channel size to rib length ensuring adequate swelling space and thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the thermal management component is designed with a rigid structure to ensure thermal management performance, then heat exchange efficiency is improved, but the battery cell cannot accommodate swelling, leading to stress concentration and reduced reliability
Solution Approach 1:
The connecting rib structure is designed to be deformable rather than rigid, allowing it to dynamically adjust its shape in response to battery cell swelling. The rib can bend and deform to accommodate volume changes of the battery cell while maintaining structural integrity, thus preventing stress concentration and improving reliability without compromising thermal management performance
2Reliability
If the connecting rib is made long to provide sufficient swelling space, then battery reliability is improved, but the flow channel size is reduced, deteriorating thermal management performance
Solution Approach 1:
The patent optimizes the geometric parameters of the connecting rib, specifically controlling the ratio of rib thickness to length within a specific range (0.005-0.03). This parameter optimization allows the rib to achieve the right balance between deformability (for providing swelling space) and structural integrity (for maintaining flow channel size). The deformable rib can bend to accommodate swelling while maintaining sufficient flow channel dimensions for effective thermal management
3Temperature
If the connecting rib is made short and thick to maintain flow channel size, then thermal management performance is improved, but the swelling space is insufficient, reducing battery reliability
Solution Approach 1:
The patent specifies that the ratio of the thickness of the connecting rib to its length should be within 0.005-0.03. This parameter control ensures the rib is not too thick, allowing it to deform sufficiently to provide swelling space, while also not being too thin, maintaining structural integrity and flow channel size for effective thermal management
4Temperature
If the thermal management component is tightly coupled to the battery cell to maximize heat exchange area, then thermal management performance is improved, but stress concentration occurs during battery swelling, reducing reliability
Solution Approach 1:
The connecting rib structure provides a dynamic, flexible connection between the thermal management component and the battery cell. When the battery cell swells, the rib can bend and deform, maintaining close contact for heat exchange while accommodating the volume change without creating stress concentration points. This dynamic adaptation preserves both thermal management effectiveness and battery reliability
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
Enhances thermal management performance and provides sufficient swelling space, reducing stress concentration and improving battery reliability and service life.
Implementation Method 1
the flow channel is used for accommodating a heat exchange medium, so as to regulate a temperature of the battery cell
Implementation Method 2
the first connecting rib is configured to be deformable to provide a swelling space for the battery cell
Data Source
AI summary
A battery includes a battery cell and a thermal management component. The thermal management component is opposite the battery cell along a first direction and connected to a first wall of the battery cell, the first wall is a wall with a largest surface area of the battery cell, and the first direction is perpendicular to the first wall. The thermal management component includes a pair of heat conducting plates opposite each other along the first direction and a first connecting rib connecting the pair of heat conducting plates. The first connecting rib is configured to be deformable when the battery cell swells, to provide a swelling space for the battery cell.