Partitioned Battery Pack Structure for Thermal Propagation Blocking

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Solution Overview

Problem

Conventional battery packs fail to adequately address thermal propagation and thermal runaway, leading to potential fires and explosions, and do not prioritize fire safety and stability.

Innovation Solution

A battery pack design featuring a partitioned structure with blocking and sealing mechanisms, fire extinguishing agents, and heat-resistant materials to contain and extinguish thermal events within the pack.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If conventional flat-shaped pack covers are used to secure space for battery cells, then energy density is improved, but thermal propagation prevention capability deteriorates

Engineering Contradiction:

Improveenergy densityVSAvoidthermal propagation

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The pack cover is segmented into multiple functional portions: a body portion covering the battery cells, a protruding portion extending toward the partition, and a blocking portion that seals between the partition and protruding portion. This segmentation creates thermal barriers that prevent heat propagation while maintaining compact space utilization.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pack cover transitions from a conventional two-dimensional flat shape to a three-dimensional structure with vertical extensions. The protruding portion extends upward toward the partition, and the blocking portion creates a seal in the vertical dimension, adding thermal protection without significantly increasing horizontal space consumption.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If additional thermal protection structures are added to the pack cover, then fire safety is improved, but device complexity increases

Engineering Contradiction:

Improvefire safetyVSAvoidpack cover structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The pack cover merges multiple functions into a single integrated component: thermal insulation, physical barrier formation, and sealing. The blocking portion is integrally connected to the protruding portion, which connects to the body portion, creating a unified structure that performs multiple safety functions without requiring separate components.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The pack cover serves multiple purposes simultaneously: it provides thermal insulation, acts as a physical barrier to flame propagation, creates sealed compartments through the blocking portion, and maintains structural integrity. This multi-functionality reduces the need for additional separate safety components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If the pack cover is designed with extended blocking portions, then thermal runaway containment is improved, but manufacturing difficulty increases

Engineering Contradiction:

Improvethermal runaway containmentVSAvoidpack cover fabrication

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The pack cover utilizes material parameter changes through phase change materials or heat-resistant materials that maintain structural integrity at high temperatures. The blocking portion is designed with specific geometric parameters (thickness, extension distance) that optimize thermal barrier performance while remaining manufacturable using standard molding techniques.

Inventive Principle:

Principle #35Parameter changes

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

Mitigates thermal propagation, enhances fire safety, and increases the stability and lifetime of battery packs and electric vehicles.

Implementation Method 1

a blocking portion positioned between the partition portion and the protruding portion and connecting the partition portion to the protruding portion

Methodology Applied

Scientific EffectThermal Insulation: Thermal Insulation

Implementation Method 2

The accommodating cover may include a fire extinguishing portion positioned between the extending portion and the protruding portion

Methodology Applied

Scientific EffectFire extinguishing:

Data Source

PatentUS20250260123A1Battery Pack

Publication Date: 2025.08.14 SK ON CO LTD

AI summary

The present disclosure relates to a battery pack including: a plurality of battery cells; an accommodating body including an opening on one surface and accommodating the plurality of battery cells therein through the opening; an accommodating cover coupled with the accommodative body to close the opening; a body bottom face forming a bottom of the accommodating body; a partition portion extending from the body bottom face toward the accommodating cover to separate the interior of the accommodating body into a plurality of accommodating spaces; a protruding portion extending from the accommodating cover toward the partition portion; and a blocking portion positioned between the partition portion and the protruding portion and connecting the partition portion to the protruding portion.