Cylindrical Battery Venting Layout for Isolated Gas Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The safety of batteries, particularly in electric vehicles, is compromised due to potential thermal runaway and explosion risks, as existing pressure relief mechanisms in cylindrical battery cells often lead to poor pressure relief and increased risk of high-voltage ignition when gases are released.
Innovation Solution
A battery design featuring cylindrical battery cells with a pressure relief mechanism on the side surface, an electrical chamber, a collection chamber, and an isolation component with a first region that protrudes to direct emissions away from the electrical chamber, preventing contact with high-voltage components and enhancing stability and space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure relief mechanism is provided on the cylindrical side surface of the battery cell, then the internal pressure can be relieved when thermal runaway occurs, but the emissions may contact high-voltage components in the electrical chamber causing ignition and explosion
Solution Approach 1:
The battery pack is segmented into distinct functional zones: the electrical chamber containing high-voltage components and the collection chamber for receiving emissions. The isolation component creates a physical barrier between these zones, ensuring that when the pressure relief mechanism activates, emissions are directed away from high-voltage components and into the collection chamber, eliminating the ignition risk while maintaining pressure relief effectiveness
Solution Approach 2:
The isolation component acts as an intermediary structure between the electrical chamber and collection chamber. It includes a first region that accommodates the battery cell and allows emissions to pass through, and a second region that blocks the passage of emissions to the electrical chamber. This intermediary structure enables controlled pressure relief while protecting sensitive components
2Volume of stationary object
If the first region of the isolation component accommodates the battery cell such that it protrudes into the collection chamber, then space utilization is improved, but the structure becomes more complex
Solution Approach 1:
The isolation component is designed with multi-functionality: it provides electrical isolation between chambers, structural support for the battery cell, and directional guidance for emissions. The first region accommodates the battery cell body while the second region blocks emissions, all within a single integrated component that also serves as a structural element of the battery pack, reducing the need for additional separate components
Solution Approach 2:
The battery cell is nested within the first region of the isolation component, which itself is nested within the battery pack structure. The isolation component's design allows the battery cell to protrude into the collection chamber space, effectively utilizing the available volume while maintaining a compact overall structure
Data Source
AI summary
A battery includes a cylindrical battery cell having a cylindrical side surface provided with a pressure relief mechanism, an electrical chamber configured to accommodate the battery cell, a collection chamber configured to collect emissions from the battery cell when the pressure relief mechanism is actuated, and an isolation component configured to isolate the electrical chamber from the collection chamber. The isolation component includes a first region and a second region. The first region is used for accommodating a first portion of the battery cell such that the first portion protrudes, towards the collection chamber, from a surface of the second region facing towards the collection chamber, and the pressure relief mechanism is disposed in a region of the cylindrical side surface located in the first portion such that the emissions are allowed to enter the collection chamber when the pressure relief mechanism is actuated.