Battery Cell Degassing Channel in Cooling Wall for Early Venting
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Solution Overview
Problem
Conventional battery systems face challenges in efficiently and reliably discharging gases from battery cells while ensuring safety, particularly in high-voltage batteries, due to complex and costly closure mechanisms required for gas discharge through cooling plates, and the need for early detection of thermal runaway events.
Innovation Solution
A battery arrangement with a degassing channel integrated into the cooling wall, allowing early detection of gas escape through a first part of the gas, which is directed into a channel below the degassing opening, and a second part that automatically burns through the cooling wall to discharge high-pressure gas, eliminating the need for additional closure mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cooling plate with passage is used to discharge gas from battery cells, then gas discharge function is achieved, but complex closure mechanisms and high costs are required
Solution Approach 1:
The invention extracts the gas discharge function from the cooling plate by providing a separate degassing channel that is integrated into the cooling wall structure. This separation eliminates the need for complex closure mechanisms in the cooling plate while maintaining reliable gas discharge capability.
Solution Approach 2:
The invention merges the degassing channel with the cooling wall structure, creating an integrated solution that combines cooling and gas discharge functions in a single structural element, thereby simplifying the overall system design.
2Difficulty of detecting and measuring
If degassing opening faces toward cooling wall, then early detection of thermal runaway is enabled, but gas discharge path becomes blocked
Solution Approach 1:
The invention resolves the spatial conflict by creating a three-dimensional degassing channel within the cooling wall structure. The channel extends from the degassing opening through the cooling wall to the external environment, providing a clear gas discharge path while maintaining the opening's orientation toward the cooling wall for early detection.
3Reliability
If additional closure mechanisms are provided for gas discharge, then controlled gas discharge is achieved, but system cost and complexity increase
Solution Approach 1:
The degassing channel is designed to function automatically without requiring additional closure mechanisms. The channel's structure and the pressure differential during thermal runaway events enable self-regulated gas discharge, eliminating the need for expensive actuators and control systems.
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
Enables simple, cost-effective, and reliable gas discharge with early detection of thermal events, reducing the risk of uncontrolled bursting and enhancing safety by distributing gas away from the passenger compartment.
Implementation Method 1
In case of a gas escape of a gas from the degassing opening of the at least one battery cell, the escaping gas is at least partially introducible into a degassing channel
Data Source
AI summary
A battery arrangement having a cooling wall arrangement, which includes a cooling wall, and having a battery unit, arranged above the cooling wall arrangement in relation to a first direction, which includes a battery cell which has a first side having a releasable degassing opening facing toward the cooling wall. The battery arrangement has a degassing channel in which gas escaping from the degassing opening. The degassing channel is arranged below the releasable degassing opening and above the cooling wall with respect to the first direction and is designed in such a way that in case of the gas escape of the gas from the degassing opening, a first part of the gas escaping from the degassing opening chronologically first is introducible into the degassing channel.