Battery Cell Degassing Channel With Curved Gas-Cooling Path
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Solution Overview
Problem
Existing battery systems face challenges in safely and efficiently removing gases from defective battery cells, which can lead to thermal runaway, particle deposition, and potential ignition of gases.
Innovation Solution
A battery arrangement with a cell gassing channel featuring a chamber with a non-straight gas steering structure that redirects gas flow multiple times, creating friction and cooling the gas, while separating particles and preventing ignition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a straight gas discharge path is used in the cell degassing channel, then the device complexity is reduced, but the gas cooling efficiency and particle separation are insufficient
Solution Approach 1:
The gas discharge path is designed with multiple bends and curved sections instead of a straight path. The channel includes at least one bend section that redirects the gas flow, increasing the contact time and surface area between the hot gas and the channel walls, thereby improving cooling efficiency without significantly increasing device complexity
Solution Approach 2:
The gas discharge path is segmented into multiple sections with different orientations and functions. The channel is divided into inlet section, bend section, and outlet section, allowing each segment to perform specific functions such as flow redirection, cooling, and particle separation, which collectively improve temperature reduction while maintaining structural simplicity
2Volume of stationary object
If a straight gas discharge path is used, then the chamber volume is maximized, but particle separation and friction-based cooling are insufficient
Solution Approach 1:
The bent gas discharge path creates multiple changes in flow direction, which generates centrifugal forces that separate particles from the gas stream. The curved sections cause particles to deposit on the outer walls of the bends, effectively removing them from the gas flow while maintaining a compact chamber volume
Solution Approach 2:
The friction between the hot gas and the channel walls, which could be seen as a loss, is actually utilized as a beneficial cooling mechanism. The extended path length increases the frictional contact area, converting the gas kinetic energy into thermal energy transfer to the walls, thereby reducing the gas outlet temperature and eliminating ignition risks
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 solution effectively cools and cleans the gas, reducing the risk of ignition and ensuring safe gas removal, while maintaining a large internal volume for efficient gas handling.
Implementation Method 1
This creates considerable friction between the guided gas and the gas deflection structure, which leads to the gas deflection structure heating up due to the guided gas. The temperature of the gas also cools down accordingly.
Implementation Method 2
As a further positive side effect, particles in the gas are separated due to the constant contact with the gas deflection structure.
Data Source
AI summary
The invention relates to a battery assembly (10), comprising a battery (12) and a cell degassing channel (24) for discharging gases (22) from the battery (12), which comprises at least one battery cell (18); wherein the cell degassing channel (24) has a chamber (26), which is designed such that a gas (22) exiting from the at least one battery cell (18) can be introduced into the chamber and can be guided through the chamber along at least one gas discharge path (38) to at least one outlet opening (30) of the chamber (26). The chamber (26) comprises at least one gas-directing structure (36) disposed in an interior (28) of the chamber (26) and extending nonlinearly in a main direction of extension (x) which corresponds to a first direction (x), the at least one gas-directing structuring being designed such that the at least one gas discharge path (38) has, over its extension in the main direction of extension (x), a plurality of changes in direction with respect to a second direction (y) perpendicular to the first direction.