Accumulator Degassing System With Labyrinth Pin And Membrane
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Solution Overview
Problem
High-energy density accumulators in hybrid and electric vehicles face challenges with overheating, excess gas pressure, and contamination from dust and water, which can lead to safety issues such as explosions and environmental harm.
Innovation Solution
A degassing system with a membrane or mesh screen that releases excess gas pressure and incorporates a labyrinthine structure with a baffle plate and drainage channels to protect against overpressure, water, and dust, ensuring the accumulator's interior is safeguarded against external contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a membrane or mesh screen is used to release excess gas pressure, then the accumulator is protected against overpressure, but the accumulator interior may be vulnerable to penetrating spray water and dust
Solution Approach 1:
The patent introduces a labyrinthine structure as an intermediary element between the membrane/mesh screen and the external environment. This labyrinth consists of a labyrinth course with channels that force contaminants to follow a tortuous path, and a baffle plate that creates additional deflection. The labyrinth acts as a mediator that allows gas to pass through the membrane while blocking spray water and dust from reaching the accumulator interior, thus resolving the contradiction between pressure relief and contamination protection.
Solution Approach 2:
The patent transitions from a simple two-dimensional membrane surface to a three-dimensional labyrinthine structure with multiple levels and deflection paths. By adding the vertical dimension with the baffle plate and creating a multi-layered labyrinth course, the system increases the path length and complexity that contaminants must traverse, effectively blocking them while maintaining gas permeability through the membrane.
2Device complexity
If a simple membrane is used for gas release, then the structure is simple, but it provides insufficient protection against spray water and dust
Solution Approach 1:
The patent divides the protection system into multiple segmented components: the membrane for gas release, the labyrinth course with its channel structure, the baffle plate for additional deflection, and drainage channels for water removal. Each segment performs a specific function, and together they create a comprehensive protection system that blocks contaminants while maintaining structural manageability and gas permeability.
Solution Approach 2:
The patent implements a nested structure where the labyrinth course is positioned within the accumulator housing, the baffle plate is placed within the labyrinth structure, and drainage channels are integrated into the housing base. This nested arrangement allows multiple protection functions to be combined in a compact configuration, providing enhanced contamination protection without excessive complexity.
3Object-affected harmful factors
If drainage channels are added to discharge condensation water, then water protection is improved, but the device complexity increases
Solution Approach 1:
The patent designs the housing base to serve multiple functions: it provides structural support, contains the labyrinthine structure, incorporates drainage channels for water discharge, and maintains the overall密封 (sealing) of the accumulator. By making the housing base a multi-functional component, the patent adds drainage capability without proportionally increasing overall device complexity, as the housing base already exists as a necessary structural element.
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
Effectively reduces excess gas pressure, prevents water and dust ingress, and enhances safety by ensuring controlled gas release and protection against overheating, thereby maintaining accumulator performance and safety.
Implementation Method 1
If the gas pressure in the accumulator increases so much that the gas overpressure exceeds a predefined value, the membrane opens. A large amount of gas is discharged from the galvanic cells into the accumulator housing, and this gas is discharged through the membrane from the accumulator housing.
Implementation Method 2
such contaminants from the outside would have to travel a route that was deflected several times in order to get into the interior of the accumulator. The deflection also protects the membrane from external influences.
Implementation Method 3
The protection against penetrating spray water or other dirt can be improved by an additional baffle plate, which is arranged at a distance below the labyrinth parade. In this way, a substantially horizontal gap is formed between the bottom of the labyrinth corso and the top of the baffle plate, which causes an additional deflection of the path from the outside into the accumulator interior.
Implementation Method 4
a socket on the underside of the labyrinth parade for connecting a hose, through which the gas escaping from the inside of the accumulator and any condensation water that may have formed in the accumulator are discharged.
Data Source
AI summary
The invention relates to a degassing system for a housing of an accumulator, and an accumulator having said degassing system, wherein the degassing system (1) comprises the following: a) a labyrinth pin (14) having a pin wall, in which a plurality of channels (17) are provided, which extend from the pin interior toward outlets disposed in an axial section (18) of the pin wall, b) a labyrinth corso (7) having a corso wall extending in the mounted stated about the axial section (18) of the pin wall such that a gap (19) is formed in the axial section (18) between the bolt wall and the corso wall, and c) a gas-permeable membrane (5) disposed on the top of the labyrinth pin (7).