Battery Pressure Venting with Spring-Guided Cover Engagement
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Solution Overview
Problem
Existing pressure compensation devices for batteries are costly, complex, prone to jamming, and difficult to protect from external influences, while using bursting membranes that are technically complex and expensive.
Innovation Solution
A pressure compensation device with a hollow cylindrical base body and a cover connected via spring elements, allowing form-fitting engagement and guided movement, ensuring efficient emergency degassing without bursting membranes, using plastic materials like polyphenylene sulfide for durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bursting membrane is used for emergency venting, then pressure equalization is achieved, but the device becomes cost-intensive and technically complex
Solution Approach 1:
The patent removes the bursting membrane from the system entirely, extracting the problematic component that caused complexity and cost issues. Instead, a simple cover with spring element is used to achieve the same pressure equalization function through a less complex mechanism.
Solution Approach 2:
The patent replaces the expensive bursting membrane with a simpler, more cost-effective cover and spring element assembly. The spring element can be reset or replaced more easily and cheaply than a specialized bursting membrane, reducing overall system cost and complexity.
2Object-affected harmful factors
If a protective cap is added to protect the membrane from external influences, then protection is improved, but the device complexity increases and jamming during emergency opening becomes more likely
Solution Approach 1:
The patent removes the protective cap component entirely, eliminating the complexity and potential jamming issues associated with it. The membrane is protected through alternative means or design choices that do not require an additional movable protective component.
Solution Approach 2:
The protective function is merged into the existing cover structure or membrane design, eliminating the need for a separate protective cap. This integration reduces the number of parts and potential failure points while maintaining protection from external influences.
3Adaptability or versatility
If multiple individual parts are used in the connecting mechanism, then the device can be adapted to individual uses, but the construction becomes more expensive and prone to jamming
Solution Approach 1:
The patent combines multiple individual connecting parts into an integrated spring element mechanism with a single cover component. This merging maintains adaptability through the spring's elastic properties while reducing the number of separate parts that could jam or increase construction complexity.
Solution Approach 2:
The spring element serves multiple functions simultaneously: it provides the connecting mechanism, enables emergency venting through elastic deformation, and allows for resetting the system. This multi-functionality reduces the need for separate specialized components for each function.
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 safe and efficient emergency venting with reduced complexity and cost, preventing jamming and protecting against external influences, while maintaining effective pressure equalization.
Implementation Method 1
at least one spring element which is attached at its first end to a support element extending axially along a centre axis of the pressure compensation device and which, with its second, free and radially resilient end forms at least one contact surface
Data Source
Figure 1~2
Figure 3~4
AI summary
A pressure compensation device (1) is suggested for connecting to a battery, having a hollow cylindrical base body (2) that can be attached to a battery casing and a cover (3). The base body (2) and cover (3) can be movably connected via a first and a second connecting means. The first connecting means is formed by at least one spring element (10) which is attached at its first end to a support element (9) extending axially along a centre axis of the pressure compensation device (1) and which, with its second, free and radially resilient end (11) forms at least one contact surface (12) which, in a normal operating state of the pressure compensation device (1), interacts with a corresponding engagement surface of the second connecting means in a form-fitting manner. The second connecting means forms a channel-shaped receptacle (14) for the first connecting means, which extends axially to the centre axis, with at least one engagement surface present in the receptacle (14), which is engaged from behind by the contact surface (12) of the free end of the spring element (10).