Battery Module Vent Chamber Cooling for Thermal Event Gas Discharge
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Solution Overview
Problem
Existing traction battery systems face challenges in effectively managing and cooling the gases released during thermal events to prevent damage to adjacent battery modules and components.
Innovation Solution
A vent chamber and cooling chamber configuration in the longitudinal support of the battery system, which cools gases as they are discharged, using separate cooling media or air flow, and includes an auxiliary channel for deflection and a sealing element to prevent re-entry of oxygenated air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas is discharged directly from the module housing via the venting unit, then the gas discharge function is simple and direct, but the hot gas can cause damage to adjacent battery modules or components
Solution Approach 1:
The patent introduces a cooling chamber as an intermediary component between the venting unit and the external environment. Hot gas discharged from the module housing first passes through the cooling chamber where it is cooled before being released, thereby preventing damage to adjacent components while maintaining a relatively simple overall structure
Solution Approach 2:
The venting system is segmented into distinct functional chambers: a venting unit for gas discharge and a separate cooling chamber for temperature reduction. This segmentation allows each component to perform its specific function efficiently while together they solve the safety issue of hot gas discharge
2Temperature
If a cooling chamber is added to cool the discharged gas, then the temperature of hot gas is reduced and damage to adjacent components is minimized, but the device complexity increases
Solution Approach 1:
The cooling chamber is merged with the longitudinal support structure that already exists in the battery system. By integrating the cooling function into the existing structural component, the patent achieves gas cooling without adding a completely separate, complex cooling system, thus minimizing the increase in device complexity
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
This configuration reduces the temperature and reactivity of discharged gases, minimizing damage to adjacent components and preventing flame formation, while optimizing installation space and maintaining system stability.
Implementation Method 1
a cooling chamber which extends along the vent chamber is configured separately from said vent chamber for cooling the gas flowing in the longitudinal support
Data Source
AI summary
A traction battery system of a motor vehicle, including at least two battery modules which each include a plurality of batteries. The battery module includes a module housing including a housing case and at least one housing cover. The battery module includes a venting unit having a vent opening and having a bursting element. Gas can be discharged from the module housing via the vent opening. The traction battery system includes a first longitudinal support and a second longitudinal support between which the battery modules are disposed. The longitudinal support has a vent chamber which is configured to receive and pass the gas flowing via the venting unit. A cooling chamber, which extends along the vent chamber, is configured separately from the vent chamber for cooling the gas flowing in the longitudinal support.