Shared Gas Duct Spacer for Thinner Stacked Battery Packs
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Solution Overview
Problem
Conventional battery packs with stacked battery blocks require large gas ducts due to their two-layer configuration, leading to increased thickness and bulkiness, which is undesirable for reduced size and weight.
Innovation Solution
A battery pack design with a spacer that includes a partition with fracture regions, allowing communication between spaces when high-temperature, high-pressure gas is released, guiding the gas through a combined larger space, thus reducing the thickness of the battery pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas ducts are designed with sufficient inner height for safety in stacked battery blocks, then gas exhaust safety is improved, but battery pack thickness increases
Solution Approach 1:
The patent merges the gas duct functions of upper and lower battery blocks into a single shared gas duct structure. Instead of providing separate gas ducts for each battery block, the invention creates one common gas duct that serves both blocks, thereby reducing the overall thickness while maintaining adequate gas exhaust capacity for safety
Solution Approach 2:
The shared gas duct structure performs multiple functions: it serves as the gas exhaust path for both the upper and lower battery blocks simultaneously, and also acts as a spacer maintaining the required distance between battery blocks. This multi-functionality eliminates the need for separate dedicated gas ducts for each block
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 enables thinner gas guiding paths, reducing the overall thickness of the battery pack by utilizing a single combined space for gas exhaust, thereby addressing the bulkiness issue.
Implementation Method 1
it is possible to place the first space and the second space in communication by melting and penetrating the fracture region of the partition
Data Source
AI summary
As a battery pack in which battery blocks are stacked in multiple layers, a battery pack is provided the thickness of which can be reduced even while space for gas ducts is secured. Battery pack includes: first battery block and second battery block each including a plurality of secondary battery cells; spacer disposed between first battery block and second battery block stacked; and outer covering case that stores first battery block, second battery block, and spacer. Spacer separates first battery block and second battery block from each other and includes partition that defines first space facing first battery block and second space facing second battery block. Partition includes fracture region at least in regions facing secondary battery cell.