Cylindrical Battery Module Resin Structure for Heat Dissipation
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Solution Overview
Problem
Battery modules with cylindrical cells face challenges in achieving both sufficient heat dissipation and structural rigidity due to increased thermal resistance from multiple internal parts.
Innovation Solution
A battery module design featuring cylindrical battery cells arranged with adjacent side surfaces, a fixing resin layer, and a thermal transmission resin layer between the cells and the case, which also includes an intermediate case and protrusion parts for uniform resin injection, enhancing heat dissipation while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple parts are assembled for heat dissipation in a battery module, then heat dissipation structure is provided, but thermal resistance increases and heat dissipation effect becomes insufficient
Solution Approach 1:
The patent combines the heat dissipation function with the structural support function by integrating the heat dissipation plate into the battery module's structural framework. The plate is positioned to直接接触 (directly contact) battery cells while providing structural support, eliminating the need for separate heat dissipation components and reducing overall part count while improving thermal conductivity path efficiency
Solution Approach 2:
The heat dissipation plate serves multiple functions simultaneously: it acts as a structural support element for the battery cells, provides a thermal conduction path for heat dissipation, and maintains the mechanical rigidity of the battery module. This multi-functionality resolves the contradiction by achieving heat dissipation without adding extra parts
2Temperature
If multiple parts are assembled for heat dissipation in a battery module, then heat dissipation structure is provided, but structural rigidity decreases
Solution Approach 1:
The heat dissipation plate is designed to serve as both a thermal management component and a structural support element. By making the plate an integral part of the module's load-bearing structure rather than an add-on component, the design maintains structural rigidity while achieving effective heat dissipation
3Quantity of substance
If cylindrical battery cells are arranged with high energy density, then energy density increases, but thermal resistance increases and heat dissipation becomes insufficient
Solution Approach 1:
The heat dissipation plate is positioned to maximize thermal contact with battery cells at critical heat generation points. The plate's surface is designed to直接接触 (directly contact) the cylindrical cells, creating localized high-conductivity thermal paths that efficiently extract heat from high-density cell arrangements without requiring increased spacing between cells
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 lowers thermal resistance, allowing for efficient heat dissipation and improved structural rigidity by directly transferring heat from the cells to the case through the thermal transmission resin layer, minimizing empty spaces and intervening parts.
Implementation Method 1
a thermal transmission resin layer formed between the fixing resin layer and the case and between the side of the battery cell assembly and the case, and in contact with the fixing resin layer and the case
Data Source
AI summary
A battery module according to an embodiment of the present invention includes: at least one battery cell assembly including a plurality of cylindrical battery cells arranged in a state that side surfaces are adjacent to each other; a case accommodating the battery cell assembly; a fixing resin layer disposed to at least one side of the length direction ends of a plurality of cylindrical battery cells and fixing a plurality of cylindrical battery cells; and a thermal transmission resin layer formed between the fixing resin layer and the case and between the side of the battery cell assembly and the case, and in contact with the fixing resin layer and the case.