Soft Pack Battery Venting With Breathable Membrane Sealing
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Solution Overview
Problem
Existing soft pack battery technologies face challenges with gas exhaust devices that fail to fully seal, have limited service life due to aging rubber plugs, and decrease energy density, leading to safety hazards and performance issues.
Innovation Solution
Incorporating a breathable membrane on the packaging film with strategically placed breathable holes that allow gas discharge while preventing liquid leakage, utilizing the pressure difference to exhaust gases effectively without additional weight or complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conduits and exhaust pipes are used to exhaust gas, then gas exhaust function is improved, but packaging sealing is worsened due to difficulty of close contact with aluminum-plastic film
Solution Approach 1:
The exhaust function is extracted from the packaging film itself by creating breathable holes directly in the aluminum-plastic film, rather than adding separate conduits and exhaust pipes. This integration eliminates the sealing interface problems between external exhaust devices and the packaging film.
Solution Approach 2:
The exhaust function is merged with the packaging film by incorporating breathable holes directly into the aluminum-plastic film structure. This combines the packaging and exhaust functions into a single integrated component, eliminating the need for separate exhaust devices and their associated sealing issues.
2Object-generated harmful factors
If rubber plugs are used in conduits and exhaust pipes, then gas exhaust is improved, but service life is worsened due to aging of rubber materials
Solution Approach 1:
The breathable holes in the aluminum-plastic film serve as a permanent, non-consumable exhaust solution that does not rely on aging rubber plugs. The film itself with its breathable holes replaces the need for replaceable rubber plug components, eliminating the service life limitation imposed by rubber material aging.
3Object-generated harmful factors
If conduits and exhaust pipes are installed on the battery, then gas exhaust function is improved, but energy density is worsened due to additional weight
Solution Approach 1:
The exhaust function is merged into the packaging film itself through breathable holes, eliminating the need for separate conduits and exhaust pipes. This integration removes the additional weight of external exhaust components, thereby preserving the battery's energy density while maintaining effective gas exhaust capability.
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
This solution enhances safety and service life by preventing battery deformation and rupture, maintaining energy density, and simplifying the packaging process with a lightweight, long-lasting gas exhaust mechanism.
Implementation Method 1
Under the pressure difference between the inside and outside of the soft pack battery, the gas inside the soft pack battery can be discharged through the breathable membrane
Implementation Method 2
The breathable membrane seals the breathable hole, and the breathable membrane is capable of blocking liquid while allowing gas to pass therethrough
Data Source
AI summary
The present application provides a soft pack battery, which comprises a packaging film provided with at least one breathable hole. The soft pack battery further comprises a breathable membrane. The breathable membrane seals the breathable hole, and the breathable membrane can block liquid while allowing gas to pass through. The gas in the soft pack battery can be discharged through the breathable membrane, thereby improving the safety performance and the service life of the battery.