Pressure Balancing Device with Integrated Drying Component
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Solution Overview
Problem
Battery packs generate heat, leading to increased internal gas pressure, which can disrupt normal operation if not properly managed, and existing pressure balancing devices may allow water vapor to enter, affecting performance.
Innovation Solution
A pressure balancing device comprising a mounting seat, breathable film, and drying component, where the drying component, typically made of silica gel, alumina gel, or molecular sieve desiccant, is positioned to absorb moisture and prevent water vapor entry while allowing pressure relief through a fluid channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure balancing device is mounted on the battery pack to discharge gas, then the pressure balance between inside and outside of the battery pack is ensured, but water vapor from the external environment may enter the battery pack and affect performance
Solution Approach 1:
A drying component is introduced as an intermediary substance within the pressure balancing device. This drying component selectively absorbs water vapor from the external environment while allowing gas discharge, thereby mediating between the need for pressure balance and the harmful effect of water vapor entry
Solution Approach 2:
The drying component is positioned specifically within the pressure balancing device structure, creating a localized quality change in the fluid path. The drying component is disposed on the support portion and located between the support portion and the breathable film, ensuring that only water vapor is absorbed while maintaining overall pressure balance functionality
2Object-affected harmful factors
If a drying component is added to absorb moisture, then water vapor entry is prevented, but the device structure becomes more complex
Solution Approach 1:
The drying component is merged with the existing pressure balancing device structure rather than being a separate external component. The drying component is disposed on the support portion and integrated between the support portion and the breathable film, combining moisture absorption functionality with the pressure balance mechanism in a single unified structure
Solution Approach 2:
The drying component utilizes a breathable film structure that allows selective permeability. The breathable film covers the fluid channel and works in conjunction with the drying component, providing a thin-film solution that maintains structural simplicity while enabling moisture absorption functionality
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 manages pressure within battery packs by releasing excess gas and absorbing water vapor, ensuring reliable operation and extending the lifespan of the desiccant by self-drying and maintaining humidity levels.
Implementation Method 1
The drying component is configured to absorb moisture entering the fluid channel
Implementation Method 2
The breathable film covers the fluid channel
Data Source
AI summary
A pressure balancing device comprises a mounting seat, a breathable film and a drying component. The mounting seat comprises a mounting seat housing and a support portion connected to the mounting seat housing. A fluid channel is formed in the mounting seat housing, the support portion is disposed in the fluid channel, and the fluid channel is capable of fluidly communicating an interior space of a component to be depressurized with the external environment. The breathable film covers on the fluid channel. The drying component is disposed on the support portion and is located between the support portion and the breathable film, and the drying component is configured to absorb moisture entering the fluid channel. In the present disclosure, the drying component is provided inside of the breathable film of the pressure balancing device, and water vapor entering the pressure balancing device is absorbed by the drying component.