Battery Module Heat Dissipation Members and Exchange Member
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Solution Overview
Problem
Conventional battery modules face challenges in effectively dissipating heat generated during charge and discharge, leading to temperature accumulation, potential fires, and explosions, while also requiring complex cooling systems that increase module size and design complications.
Innovation Solution
A battery module structure with heat dissipation members at multiple interfaces between battery cells and a heat exchange member integrated on one side of the stack, allowing for efficient heat dissipation through conduction without the need for extensive coolant channels, enhancing mechanical strength and reducing module size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If coolant channels are formed between stacked battery cells to remove heat, then heat dissipation ability is improved, but the overall size of the battery module increases and design becomes complicated
Solution Approach 1:
The invention extracts the cooling function from the battery cell structure itself and separates it into an independent heat exchange member. The heat dissipation members are disposed between battery cells to conduct heat away, while the heat exchange member is mounted separately on one side of the stack, eliminating the need for complex internal coolant channels within each cell.
Solution Approach 2:
The invention introduces heat dissipation members as intermediary components between the battery cells and the heat exchange member. These members conduct heat from the battery cell interfaces to the heat exchange member, which then dissipates heat to the coolant, creating a simplified thermal pathway without requiring direct coolant channels through the cells.
2Weight of moving object
If battery cells are stacked with high integration to reduce size, then weight to capacity ratio is improved, but heat dissipation becomes more difficult
Solution Approach 1:
The invention transitions from one-dimensional heat dissipation (through spacing between cells) to three-dimensional heat dissipation by placing heat dissipation members at multiple interfaces between cells and connecting them through a heat exchange member mounted on one side of the stack, enabling efficient heat removal in densely packed configurations.
Solution Approach 2:
The heat dissipation members are pre-positioned at the interfaces between battery cells before final assembly, creating thermal pathways in advance that enable efficient heat conduction even when cells are densely stacked with minimal spacing.
3Ease of manufacture
If laminate sheet with low thermal conductivity is used for battery case, then manufacturing cost is reduced, but heat dissipation ability deteriorates
Solution Approach 1:
The invention creates a composite thermal management system combining the laminate sheet battery case (for cost and structural benefits) with thermally conductive heat dissipation members and a heat exchange member (for thermal performance), allowing the system to achieve both low cost and effective heat dissipation.
Solution Approach 2:
The heat dissipation members act as thermal intermediaries that bridge the low thermal conductivity laminate sheet case with the heat exchange member, conducting heat away from the battery cells through the interfaces despite the insulating properties of the laminate material.
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 solution achieves high heat dissipation efficiency, minimizing temperature deviations and module size, while improving safety and service life by effectively transferring heat away from battery cells, even with high integration and dense stacking.
Implementation Method 1
heat dissipation members are disposed at two or more interfaces between the battery cells, and a heat exchange member integrally interconnecting the heat dissipation members is mounted to one side of a stack of the battery cells
Data Source
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AI summary
Disclosed herein is a battery module constructed in a structure in which a plurality of plate-shaped battery cells are sequentially stacked in a module case, wherein each of the plate-shaped battery cells includes an electrode assembly of a cathode/separator/anode structure mounted in a battery case formed of a laminate sheet including a resin layer and a metal layer, a plurality of heat dissipation members are disposed at two or more interfaces between the battery cells, and a heat exchange member integrally interconnecting the heat dissipation members is mounted to one side of a stack of the battery cells, whereby heat generated from the battery cells during the charge and discharge of the battery cells is removed by the heat exchange member.