Battery Module Heat Exchange Member for Thermal Management
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Solution Overview
Problem
Lithium secondary batteries generate significant heat during charge and discharge, leading to accumulation and reduced safety, especially in high-power applications like electric vehicles, where existing heat dissipation methods are inadequate due to low thermal conductivity materials and inefficient heat transfer.
Innovation Solution
A battery module design featuring a heat exchange member with interconnected heat exchange plates and a frame, mounted at one side of the battery cell stack, which absorbs and efficiently discharges heat without increasing module thickness, using heat exchange medium channels for enhanced cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery cells are stacked to increase capacity, then the battery module can provide higher power and larger capacity, but heat dissipation becomes insufficient and heat accumulates in the battery cells
Solution Approach 1:
A heat exchange member is introduced as an intermediary between the battery cells and the external environment. This member includes heat exchange plates that contact the battery cells and heat exchange medium channels that facilitate heat transfer, effectively mediating the heat dissipation process without requiring changes to the battery cell stacking structure
Solution Approach 2:
The patent utilizes fluid dynamics by introducing heat exchange medium channels through which cooling fluid flows. The fluid absorbs heat from the battery cells through convection and conduction, carrying thermal energy away from the battery module. The channels are designed to optimize fluid flow patterns for efficient heat removal
2Ease of manufacture
If laminate sheet material is used for battery case, then manufacturing is simplified and cost is reduced, but thermal conductivity is insufficient for effective heat dissipation
Solution Approach 1:
The battery case is constructed as a composite structure combining laminate sheet material for the main body with integrated heat exchange member components. The laminate provides structural integrity and manufacturing advantages, while the integrated heat exchange member (made of thermally conductive material) provides effective heat dissipation pathways
Solution Approach 2:
The heat exchange member is merged with the battery case structure, combining the protective housing function with the heat dissipation function. This integration allows the laminate battery case to maintain its manufacturing advantages while the attached heat exchange member compensates for the low thermal conductivity of the laminate material
3Temperature
If heat exchange member is mounted at one side of battery cell stack, then heat dissipation efficiency is improved without increasing module thickness, but the structure becomes more complex
Solution Approach 1:
Instead of increasing heat dissipation capacity by adding more heat exchange surfaces in the thickness direction (which would increase module thickness), the patent utilizes the lateral dimension by mounting the heat exchange member at one side of the battery cell stack. This dimensional approach maintains compact thickness while achieving effective heat removal through optimized fluid flow channels
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
This design effectively controls battery cell temperature, maximizing heat dissipation efficiency and ensuring safety and longevity, particularly in high-power applications by utilizing heat exchange plates and medium channels to manage heat generated during ion reactions.
Implementation Method 1
a heat exchange member, including a plurality of heat exchange plates and a frame to which the heat exchange plates are connected, is mounted at one side of a stack of the battery cells for removing heat generated from the battery cells
Implementation Method 2
heat exchange medium channels for enhanced cooling
Implementation Method 3
heat exchange member including a plurality of heat exchange plates and a frame to which one side of each of the heat exchange plates is connected
Data Source
AI summary
Disclosed herein is a battery module including two or more plate-shaped battery cells sequentially stacked, wherein each of the plate-shaped battery cells is constructed in a structure in which an electrode assembly of a cathode/separator/anode structure is mounted in a battery case formed of a laminate sheet including a resin layer and a metal layer, and a heat exchange member, including a plurality of heat exchange plates and a frame to which the heat exchange plates are connected, is mounted at one side of a stack of the battery cells for removing heat generated from the battery cells during the charge and discharge of the battery cells.