Battery Module Partition Structure for Blocking Cell-to-Cell Heat Transfer
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Solution Overview
Problem
In existing power storage modules, heat generated from an electrode assembly in one compartment can easily be transmitted to adjacent compartments through partitions, potentially leading to thermal issues and reduced performance.
Innovation Solution
A power storage module design featuring a case with partition portions composed of a pair of resin layers and a metal layer, where the metal layer is positioned between the resin layers and extends orthogonally to the direction of the electrode assemblies, preventing heat transfer between compartments by diffusing and discharging heat outside the case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a partition portion is provided between electrode assemblies to separate compartments, then the structural integrity and organization of the battery case is improved, but heat generated from one electrode assembly is easily transmitted to adjacent compartments through the partition
Solution Approach 1:
The partition portion is constructed as a composite structure with a resin layer and a metal layer. The resin layer provides structural integrity and electrical insulation, while the metal layer acts as a heat barrier to prevent thermal transmission between compartments. This composite material approach resolves the contradiction by combining materials with complementary properties.
Solution Approach 2:
The metal layer serves as an intermediary heat barrier between adjacent electrode assemblies. It intercepts and blocks heat transmission paths that would otherwise conduct thermal energy through the partition structure, thereby preventing thermal runaway propagation while maintaining structural continuity.
2Temperature
If a metal layer is added to the partition portion to block heat transmission, then thermal management is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The resin layer and metal layer are integrated into a single partition component through integral formation. This merging of materials into one unified structure simplifies assembly and reduces the number of separate parts, thereby reducing device complexity despite the multi-material construction.
Solution Approach 2:
The partition portion simultaneously performs multiple functions: structural support, electrical insulation, and thermal barrier. By combining these functions into a single multi-functional component, the design avoids the need for separate elements for each function, thereby reducing overall device complexity.
3Temperature
If the metal layer extends in a direction orthogonal to the electrode assembly arrangement, then heat diffusion is enhanced and heat discharge to the outside is facilitated, but the manufacturing precision requirements increase
Solution Approach 1:
The metal layer is configured with specific dimensional parameters and orientation relative to the electrode assemblies. By optimizing these parameters during design, the structure achieves effective heat diffusion while accommodating standard manufacturing tolerances, thereby balancing thermal performance with manufacturability.
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
Effectively prevents heat generated by one electrode assembly from being transmitted to other compartments, enhancing thermal management and maintaining performance by efficiently dissipating heat away from the module.
Implementation Method 1
when the heat is transmitted to the metal layer, the heat is diffused in the direction orthogonal to the first direction, and as a result, the heat is easily discharged to the outside of the case body
Data Source
AI summary
A power storage module includes a case that houses a plurality of electrode assemblies. The case includes a case body and at least one partition portion. The case body surrounds the plurality of electrode assemblies. The partition portion is located between the electrode assemblies adjacent to each other to partition an accommodation space of the case body. The partition portion includes a pair of resin layers and a metal layer. The pair of resin layers is formed integrally with the case body and the resin layers are arranged in a first direction. The metal layer is located between the resin layers and extends in a direction orthogonal to the first direction.