Battery Pack Cold Storage Member Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery packs for electric mobile objects, such as eVTOLs, face challenges in effectively dissipating heat due to the low thermal conductivity of cold storage materials, which are insufficient for transferring heat efficiently.
Innovation Solution
Incorporating a cold storage member with a supporter and beams made of materials with higher thermal conductivity than the cold storage material, allowing heat to be dissipated through both the supporter and beams, enhancing heat transfer to the cold storage material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cold storage material is brought into contact with battery cell, then cooling function is provided, but heat transfer efficiency is insufficient due to low thermal conductivity
Solution Approach 1:
A heat transfer member with high thermal conductivity is introduced as an intermediary between the battery cell and cold storage material. This mediator overcomes the low thermal conductivity of the cold storage material by providing a dedicated heat conduction path, enabling efficient heat transfer from the battery cell to the cold storage material without requiring direct contact between them.
Solution Approach 2:
The cooling system uses a composite structure combining the cold storage material (phase change material) with a heat transfer member made of high thermal conductivity material. This composite approach leverages the latent heat storage capability of the cold storage material while using the heat transfer member to efficiently conduct heat, creating a synergistic cooling system that overcomes the limitations of either material alone.
2Temperature
If more cold storage material is used to improve heat dissipation, then cooling performance increases, but device complexity and weight increase
Solution Approach 1:
The heat transfer member acts as an intermediary that concentrates and directs heat flow to the cold storage material, eliminating the need for large quantities of cold storage material. By providing a focused heat conduction path, the system achieves effective cooling with a more compact and simpler cold storage member structure.
Solution Approach 2:
Instead of uniformly distributing cold storage material throughout a large volume, the system concentrates the cold storage material in specific locations where the heat transfer member directs heat flow. This localized approach maintains effective cooling while reducing the overall amount of cold storage material needed, thereby simplifying the device structure and reducing weight.
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 improved heat dissipation performance of the battery pack reduces weight and increases the driving range of electric vehicles by efficiently managing heat generated by battery cells, particularly in high-output conditions.
Implementation Method 1
The cold storage material is a latent heat storage material that absorbs heat from the battery cell by utilizing a phase change from solid to liquid
Implementation Method 2
The cold storage material is a latent heat storage material that absorbs heat from the battery cell by utilizing a phase change from solid to liquid
Implementation Method 3
The beam bridges the wall. The supporter and the beam are made of a material that has a greater thermal conductivity than the cold storage material
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A battery pack to be installed in an electric mobile object includes a battery cell (30), and a cold storage member (40) configured to cool the battery cell. The cold storage member includes a supporter (41) that has a wall defining a space therein, a cold storage material (42) that is disposed in the space and supported by the supporter, and a beam (43) that bridges the wall. The supporter and the beam are made of a material that has a better thermal conductivity than the cold storage material.