Battery Vent Membrane Assembly for Pressure Balance and Emergency Venting
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Solution Overview
Problem
Existing ventilation devices for battery systems require two separate devices for pressure compensation in normal operation and emergency venting in case of technical defects, leading to increased weight and maintenance complexity.
Innovation Solution
A single ventilation device with a housing, cap, first membrane for pressure balance, and second membrane for emergency venting, where the cap is connected to both membranes, simplifying mounting and maintenance while minimizing parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate devices are used for pressure compensation and emergency venting, then both functions are fulfilled, but the weight and maintenance complexity increase
Solution Approach 1:
The patent combines pressure compensation and emergency venting functions into a single ventilation device. The housing contains both a first membrane for pressure compensation and a second membrane for emergency venting, eliminating the need for two separate devices and reducing overall weight and maintenance complexity.
Solution Approach 2:
The single ventilation device performs multiple functions: the first membrane handles pressure compensation during normal operation, while the second membrane provides emergency venting capability. This multi-functional design reduces the number of components while maintaining reliability.
2Reliability
If two separate devices are used for pressure compensation and emergency venting, then both functions are fulfilled, but the maintenance complexity increases
Solution Approach 1:
By merging both venting functions into one integrated device with a single housing, the patent reduces the number of components that need maintenance. The modular design with replaceable membranes allows for simplified repair procedures while maintaining both pressure compensation and emergency venting capabilities.
3Device complexity
If a single ventilation device with cap connected to both membranes is used, then the number of parts is minimized, but the mounting complexity may increase
Solution Approach 1:
The device is segmented into modular components: a housing containing the membranes, and a separate cap that connects to both membranes. This segmentation reduces the total number of parts while maintaining ease of assembly, as the cap serves as a single integration point for both membrane connections.
Solution Approach 2:
The cap serves multiple functions by connecting to both the first and second membranes, acting as a universal connection element. This multi-functional component simplifies the overall assembly by reducing the number of separate connection elements needed.
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 device effectively balances internal pressure with ambient pressure during normal operation and provides emergency venting when needed, all while being robust, easy to manufacture and maintain, and using fewer parts.
Implementation Method 1
a first membrane (24) ensuring pressure balance between an inside of a battery system and an external environment during normal operation conditions of the battery system
Implementation Method 2
a second membrane (26) ensuring an emergency venting in case of technical defect within the battery system
Data Source
Figure 1~2
Figure 3
AI summary
Battery system (10) comprising a battery casing with a vent opening (18) and a ventilation device (12) and ventilation device (12) comprising a first membrane (24) adapted to ensure pressure balance between the inside of the battery casing (14) and its environment during normal operation conditions of the battery system and a second membrane (26) adapted to ensure an emergency venting in case of technical defect within the battery system (10).