Battery Pack Partition Plate With Temperature-Expanding Foam Insulation
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Solution Overview
Problem
Existing battery pack designs with partition plates for heat insulation are thick, leading to low volumetric efficiency and potential damage from concentrated heat, which complicates heat transfer and safety.
Innovation Solution
A battery pack design featuring a partition plate with a metal mesh and heat insulating layers made of foam materials that expand at specific temperatures, providing effective heat dispersion and absorption without increasing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a partition plate with heat insulating layer is used to suppress heat conduction between batteries, then heat insulation effect is improved, but the thickness of the partition plate increases resulting in low volumetric efficiency
Solution Approach 1:
The heat insulating layer utilizes temperature-dependent parameter changes: at normal temperatures it maintains a thin profile for high volumetric efficiency, but when temperature reaches 110-200°C the foam material expands to provide enhanced heat insulation. This dynamic parameter change resolves the contradiction between thinness and insulation effectiveness.
Solution Approach 2:
The partition plate transitions from a static structure to a dynamic one through the heat-activatable foam material. The heat insulating layer dynamically adjusts its thickness based on temperature conditions, being thin during normal operation and expanding during abnormal heat generation, thus resolving the volume-insulation trade-off.
2Reliability
If the partition plate is made thick to prevent heat concentration damage, then safety is improved, but the size and weight of the battery pack increase
Solution Approach 1:
The partition plate employs parameter changes where the heat insulating layer's physical state and thickness are temperature-dependent. At normal temperatures, the layer remains thin to minimize weight, but automatically expands at elevated temperatures to provide protective insulation, thus achieving safety without permanent weight penalty.
Solution Approach 2:
The heat insulating layer acts as a sacrificial protective element that activates only during abnormal conditions. It provides temporary emergency protection when heat concentration occurs, then can be replaced if needed, offering cost-effective and weight-efficient safety rather than requiring permanently thick protective structures.
3Reliability
If the partition plate is made thick to prevent heat concentration damage, then safety is improved, but the size of the battery pack increases
Solution Approach 1:
The partition plate utilizes parameter changes where the heat insulating layer's thickness is temperature-dependent. It maintains a compact thin profile during normal operation to maximize battery pack density, then automatically expands at 110-200°C to provide protective insulation, resolving the safety-size contradiction through dynamic adaptation.
Solution Approach 2:
The partition plate transforms from a static thick structure to a dynamic adaptive structure. The heat insulating layer dynamically adjusts its volume based on temperature conditions, providing safety protection only when needed during abnormal heat generation, thus avoiding permanent size increase while maintaining safety.
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 design effectively suppresses heat conduction between batteries, enhances safety, and reduces the size and weight of the battery pack while maintaining high heat insulation efficiency.
Implementation Method 1
The heat insulating layer includes a foam material capable of foaming at a temperature of 110° C. or more and 200° C. or less, so that the thickness of the heat insulating layer increases when the foam material foams
Implementation Method 2
Since the partition plate includes the metal mesh, the partition plate allows the heat to be dispersed efficiently
Implementation Method 3
even when a large amount of heat is generated in a specific part of the battery pack due to abnormal heat generation of one of batteries contained in the battery pack, the conduction of the heat to other batteries can be effectively suppressed
Data Source
AI summary
A battery pack includes: a plurality of batteries; a housing for containing the batteries; and at least one partition plate for separating the batteries from one another. The at least one partition plate includes a metal mesh and a heat insulating layer disposed on each side of the metal mesh. The heat insulating layer includes a foam material capable of foaming at a temperature of 110° C. or more and 200° C. or less, so that the thickness of the heat insulating layer increases when the foam material foams. Even when one of the batteries contained in the battery pack generates abnormal heat, the conduction of the heat to other batteries can be effectively suppressed.