Battery Pack Partition Wall for Thermal Propagation Suppression
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Solution Overview
Problem
Lithium secondary batteries are vulnerable to thermal events, which can lead to thermal propagation and potential accidents such as fire or explosion, especially in large battery packs used in electric vehicles, due to the concentration of battery cells and modules in a narrow space.
Innovation Solution
A battery pack design incorporating a partition wall with a heat-resistant member, such as silicone or aerogel materials, to suppress thermal propagation and improve rigidity, featuring a structure with plates and heat-resistant members that extend along the edges and surfaces of the partition wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large number of battery cells and modules are concentrated in a narrow space to increase output and capacity, then productivity and energy density are improved, but thermal safety deteriorates due to increased risk of thermal chain reaction
Solution Approach 1:
The partition wall divides the battery pack into multiple independent compartments, physically separating battery cells or modules. This segmentation prevents thermal propagation from affecting the entire pack, allowing higher density arrangement while maintaining safety through spatial isolation of thermal events
Solution Approach 2:
The heat-resistant member acts as a thermal barrier between adjacent battery cells or modules. This intermediary component with low thermal conductivity blocks heat transfer pathways, enabling closer placement of battery units while preventing thermal chain reactions through the partition structure
2Reliability
If a partition wall is added to suppress thermal propagation, then thermal safety is improved, but device complexity increases
Solution Approach 1:
The partition wall serves multiple functions simultaneously: it provides structural support for the battery pack, creates physical separation between battery units, and when combined with the heat-resistant member, acts as a thermal barrier. This multi-functionality reduces the need for separate safety components, offsetting the added complexity with functional consolidation
Solution Approach 2:
The combination of the partition wall structure with the heat-resistant member creates a composite thermal barrier system. This integrated approach combines structural and thermal protection functions in a unified component, achieving enhanced safety without proportionally increasing overall system complexity
3Object-affected harmful factors
If a partition wall with heat-resistant member is installed, then thermal propagation is suppressed, but manufacturing complexity increases
Solution Approach 1:
The heat-resistant member is pre-installed onto the partition wall structure before final assembly with the battery cells or modules. This preliminary action allows the thermal barrier to be integrated into the partition wall as a unified sub-assembly, simplifying the overall manufacturing process by reducing the number of separate installation steps
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 enhances thermal safety by suppressing thermal propagation and improves the structural rigidity of the battery pack, reducing the risk of accidents and enhancing overall safety.
Implementation Method 1
a heat-resistant member provided on one surface of the partition wall
Data Source
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AI summary
Disclosed is a battery pack. A battery pack according to one embodiment of the present disclosure may include a base plate; a battery assembly including a case installed on an upper surface of the base plate and a plurality of battery cells positioned inside the case; a partition wall installed on the upper surface of the base plate; and a heat-resistant member provided on one surface of the partition wall.