Battery Partition Member Structure for Gap-Free Thermal Contact
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Solution Overview
Problem
In assembled batteries, the contraction of single batteries leads to a gap formation between the partition member and the battery, reducing thermal conductivity due to air infiltration, which existing partition members fail to prevent effectively.
Innovation Solution
A partition member comprising a thermal insulation material and an auxiliary member with a specific density and area ratio, positioned to regulate the contraction of the thermal insulation material, ensuring recoverability and maintaining close adhesion to the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a thermal insulation material is used as a partition member, then thermal insulation performance is improved, but thermal conductivity is reduced when gap forms
Solution Approach 1:
The patent changes the physical state parameters of the partition member by incorporating a phase change material that transitions between solid and liquid states. This allows the material to maintain both thermal insulation properties in solid state and thermal conductivity through liquid state heat transfer, resolving the contradiction between insulation performance and conductivity reliability
Solution Approach 2:
The patent creates a composite material structure combining thermal insulation material with phase change material. This composite enables the partition member to simultaneously achieve thermal insulation through the insulation material and thermal conductivity through the phase change material's liquid state, eliminating the gap formation problem
2Strength
If the partition member is compressed to maintain adhesion, then close adhesion is improved, but recoverability is reduced
Solution Approach 1:
The patent utilizes phase transition of the phase change material to resolve the contradiction. When compressed, the material transitions to liquid state maintaining adhesion; when pressure is released, it transitions back to solid state recovering its original form. This phase transition mechanism enables both strong adhesion under pressure and full recoverability after pressure release
Solution Approach 2:
The patent makes the partition member dynamically adaptable by incorporating a phase change material that changes its physical state in response to pressure conditions. The material transitions from solid to liquid under compression for adhesion, and from liquid back to solid when pressure is released for recovery, creating a dynamic system that adapts to varying mechanical conditions
3Device complexity
If the partition member structure is simplified, then device complexity is reduced, but heat transfer control is insufficient
Solution Approach 1:
The patent makes the partition member multi-functional by incorporating a phase change material that simultaneously provides thermal insulation, thermal conductivity, mechanical adhesion, and pressure recovery functions. This single composite material structure replaces what would otherwise require multiple separate components, achieving heat transfer control without increasing device complexity
Solution Approach 2:
The patent merges the functions of thermal insulation material and phase change material into a single integrated partition member structure. This combination enables the partition member to perform both insulation and active heat transfer control through phase transition, eliminating the need for separate control mechanisms and maintaining structural simplicity
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 solution prevents gap formation between the partition member and the battery, maintaining thermal conductivity and ensuring the partition member's recoverability under changing pressure conditions.
Implementation Method 1
a phase change material, and an outer package body for accommodating the phase change material and the thermal insulation material
Data Source
AI summary
A partition member which has a thickness direction and a planar direction orthogonal to the thickness direction and which constitutes a partition between single batteries in the thickness direction or between a single battery and a member other than the single battery, wherein the partition member includes a thermal insulation material, and an auxiliary member which is disposed so as to be adjacent to the thermal insulation material in the planar direction and regulates a degree of contraction of the thermal insulation material in the thickness direction. A ratio of a density of the auxiliary member relative to a density of the thermal insulation material is 0.50 to 6.0.