Battery Partition Member Structure to Prevent Thermal Contact Gaps
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Solution Overview
Problem
Existing partition members in assembled batteries fail to maintain close adhesion to single batteries due to gaps forming between the partition member and the battery, leading to reduced thermal conductivity and increased thermal resistance, especially under conditions of pressure and temperature changes.
Innovation Solution
A partition member comprising a thermal insulation material and an auxiliary member with a specific density ratio and area ratio, which regulates the contraction of the thermal insulation material to prevent gaps, ensuring recoverability and maintaining close adhesion.
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 decreases
Solution Approach 1:
The partition member is divided into multiple functional layers: a thermal insulation material layer for heat isolation and a recovery promotion layer for maintaining contact pressure. This segmentation allows each layer to perform its specific function optimally without interfering with the other, resolving the contradiction between insulation and thermal management.
Solution Approach 2:
The partition member uses a composite structure combining a thermal insulation material (such as foam or fiber material) with a recovery promotion layer (such as an elastic member). This composite design integrates both thermal insulation properties and mechanical recovery properties, allowing the partition member to simultaneously provide heat isolation and maintain close adhesion through elastic recovery.
2Stability of the object's composition
If pressure is applied to accommodate single batteries in housing, then battery stability is improved, but gaps form between partition member and battery
Solution Approach 1:
The recovery promotion layer is designed with elastic properties that allow it to dynamically adjust to pressure changes. When pressure is applied during battery installation, the elastic member compresses; when pressure is released, it rebounds to maintain close adhesion. This dynamic response ensures stable battery accommodation while preventing gap formation.
Solution Approach 2:
The partition member utilizes the elastic properties of the recovery promotion layer to change its physical state in response to pressure. The elastic member's compression and rebound characteristics allow it to adapt to different pressure conditions, maintaining optimal contact pressure and close adhesion throughout the battery's operational lifecycle.
3Manufacturing precision
If elastic members are used as partition members, then close adhesion is improved, but thermal insulation performance decreases
Solution Approach 1:
The partition member is divided into distinct functional layers: a thermal insulation material layer for heat isolation and a recovery promotion layer for maintaining contact pressure. This segmentation allows the elastic member to provide close adhesion without compromising the thermal insulation performance of the dedicated insulation layer.
Solution Approach 2:
The partition member combines a thermal insulation material with an elastic recovery promotion layer in a composite structure. The thermal insulation material provides heat isolation while the elastic layer provides mechanical compliance and close adhesion, allowing both functions to coexist without interfering with each other's performance.
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 effectively prevents gaps between the partition member and single batteries, maintaining thermal conductivity and reducing thermal resistance, even under conditions of pressure and temperature changes.
Implementation Method 1
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
Implementation Method 2
maintaining thermal conductivity and reducing thermal resistance, even under conditions of pressure and temperature changes
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.