Battery Cell Degassing Channel With Curved Gas-Cooling Paths
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Solution Overview
Problem
Existing battery systems face challenges in safely and efficiently discharging gases from defective cells, particularly high-voltage batteries, which can lead to thermal runaway and spontaneous ignition due to uncontrolled gas discharge and particle entrainment.
Innovation Solution
A battery assembly with a cell degassing channel featuring a chamber with a gas guiding structure that deflects gas flow multiple times, creating friction and deceleration, which reduces gas temperature and particle content, and includes multiple gas guiding structures within the chamber to enhance particle separation and cooling, thereby minimizing the risk of ignition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple straight gas discharge path is used, then the device complexity is reduced, but the gas temperature and particle content remain high leading to ignition risk
Solution Approach 1:
The gas discharge path is designed with multiple curved sections instead of straight lines, creating a serpentine or zigzag configuration that increases friction and cooling contact while maintaining a relatively simple overall structure
Solution Approach 2:
The gas discharge path extends in multiple spatial dimensions rather than a single straight line, creating a three-dimensional winding path that increases cooling surface area and friction without significantly increasing the device's external dimensions
2Temperature
If multiple gas guiding structures are added to increase friction and cooling, then gas temperature reduction is improved, but the device complexity increases
Solution Approach 1:
The chamber is divided into multiple sections by partition walls with varying degrees of extension, creating multiple gas discharge paths that collectively provide extensive cooling surface area while maintaining a relatively simple overall chamber structure
Solution Approach 2:
The partition walls serve multiple functions simultaneously: they guide gas flow, provide cooling surfaces, create friction to reduce gas velocity, and define multiple discharge paths, thereby reducing device complexity while achieving temperature reduction
3Temperature
If the gas discharge path is extended to increase cooling, then gas temperature reduction is improved, but the loss of time increases
Solution Approach 1:
The gas discharge path is pre-designed with optimized curvature and length to achieve sufficient cooling within the available time, preventing overheating before gas exit while maintaining rapid discharge capability
Solution Approach 2:
The geometry parameters of the gas discharge path (curvature radius, path length, cross-sectional area) are optimized to balance cooling efficiency with discharge speed, ensuring adequate temperature reduction without excessive time delay
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 reduces the temperature and particle content of discharged gases, significantly lowering the risk of ignition and ensuring safer, more efficient gas discharge by maximizing contact surface area and thermal energy absorption, preventing flame or self-ignition outside the battery system.
Implementation Method 1
creates friction and deceleration, which reduces gas temperature
Implementation Method 2
maximizing contact surface area and thermal energy absorption
Data Source
AI summary
A battery assembly with a battery and a cell degassing channel for discharging gases from the battery, which includes at least one battery cell. The cell degassing channel has a chamber which is designed such that a gas emerging from the at least one battery cell can be introduced into it and can be guided through it along at least one gas discharge path to at least one outlet opening of the chamber. The chamber has at least one gas guiding structure arranged in an interior of the chamber and not running in a straight line in a main course direction that corresponds to a first direction, which is designed such that the at least one gas discharge path has multiple changes of direction in its course in the main course direction with respect to a second direction perpendicular to the first direction.