Battery Housing Exhaust Duct for Spark-Trap Venting
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Solution Overview
Problem
Current battery modules in vehicles experience uncontrolled degassing and potential ignition during thermal runaway, leading to damage and risk of complete destruction due to the unmonitored escape of high-energy media, such as hot gases and sparks, which is not adequately addressed by existing venting systems.
Innovation Solution
A battery housing with an integrated exhaust duct that redirects and controls the discharge of media during thermal runaway, featuring a deflection region to change the transport direction of escaping gases and sparks, thereby minimizing pressure losses and preventing ignition, and incorporating a safety valve for pressure-activated release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a venting system is installed to release pressure from the battery housing, then pressure relief is achieved, but uncontrolled escape of high-energy media (hot gases and sparks) causes ignition risk and damage to the battery system
Solution Approach 1:
The exhaust duct serves as an intermediary component between the battery housing interior and the external environment. It provides a controlled pathway for hot gases and sparks to escape, directing them away from the battery system and preventing uncontrolled ignition. The duct acts as a mediator that manages the harmful escape of thermal runaway products while maintaining pressure relief functionality.
Solution Approach 2:
The harmful media (hot gases and sparks) are extracted from the battery housing through a dedicated exhaust duct. By separating the escape path of these harmful substances from the battery housing structure, the system prevents them from causing damage to other components. The exhaust duct specifically extracts and redirects the thermal runaway products to a safe discharge location.
2Reliability
If the battery housing is sealed to protect battery modules from external factors, then protection is improved, but pressure buildup during thermal runaway cannot be released
Solution Approach 1:
The housing structure has different sealing properties in different regions. The main battery housing remains sealed to protect modules, while the exhaust duct provides a localized controlled opening. This local quality differentiation allows the system to maintain overall protection while providing a specific pathway for pressure relief during thermal runaway events.
3Reliability
If additional safety components are added to monitor and control media escape, then safety is improved, but the battery system requires additional space
Solution Approach 1:
The exhaust duct integrates multiple safety functions into a single component structure. It combines pressure relief, spark containment, hot gas direction, and controlled media escape into one integrated duct system. This merging eliminates the need for separate monitoring and control components, providing comprehensive safety control while minimizing space requirements.
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 ensures controlled and safe discharge of media, reducing the risk of ignition and damage by minimizing exposure to oxygen and intercepting sparks within the exhaust duct, thus enhancing the safety and reliability of the battery system.
Implementation Method 1
a first deflection region which is designed and configured to change the transport direction of the media
Implementation Method 2
intercepting sparks within the exhaust duct, thus enhancing the safety and reliability of the battery system
Data Source
AI summary
A battery housing for accommodating one or more battery modules in its housing interior to form a traction battery for a motor vehicle, includes a housing section for partially delimiting the housing interior, the housing section having an exhaust duct integrated therein for discharging media which emerge from a battery module in the event of a defect thereof to the surroundings, and the exhaust duct having an inlet region through which the media enter the exhaust duct from the housing interior, and a first deflection region which is designed and configured to change the transport direction of the media.