Battery Case Gas Adsorption Layer with Dissolvable Blocking Film
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery cases fail to effectively adsorb gas generated within the battery without reducing overall performance, and conventional gas adsorption layers are exposed or lose effectiveness during assembly, leading to potential fire or explosion risks.
Innovation Solution
A battery case with a gas adsorption layer on its inner surface and a blocking layer on the outer surface of the adsorption material, where the blocking layer dissolves with electrolytic solution to expose the adsorption material only when the battery is sealed, allowing it to adsorb generated gas effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gas adsorption layer is exposed during battery assembly, then gas adsorption capacity is improved, but gas in air is adsorbed during assembly reducing effectiveness
Solution Approach 1:
The blocking layer is applied in advance to protect the gas adsorption material layer from adsorbing air gas during assembly. The blocking layer is designed to be dissolved by electrolytic solution after assembly, at which point the gas adsorption material layer becomes active. This preliminary protective action prevents premature adsorption that would reduce effectiveness.
Solution Approach 2:
The blocking layer acts as an intermediary between the gas adsorption material layer and the external environment during assembly. It temporarily prevents direct contact between the adsorption material and air, then dissolves to allow the adsorption material to function properly after assembly when it contacts electrolytic solution.
2Reliability
If conventional safety measures (PTC element, fuse, decompression protection circuit) are added, then battery safety is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts the gas management function from complex electronic safety systems and implements it through a simple passive chemical mechanism. Instead of using active electronic components like PTC elements, fuses, or decompression circuits, the patent uses a gas adsorption material layer that passively adsorbs gas through chemical affinity, eliminating the need for complex control circuits and additional safety components.
Solution Approach 2:
The gas adsorption material layer is designed as a simple, inexpensive, single-use component that performs its function through material properties rather than complex mechanisms. The blocking layer is a temporary protective element that dissolves after serving its purpose, representing a simple disposable component rather than a complex reusable system.
3Quantity of substance
If gas pockets are removed to increase energy density, then energy density is improved, but gas removal capability is reduced
Solution Approach 1:
The gas adsorption material layer provides self-service gas management without requiring dedicated gas pockets or active removal systems. The material automatically adsorbs generated gas through its chemical properties, eliminating the need for separate gas management structures while maintaining safety. This self-service mechanism allows maximization of active material density without compromising gas handling 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
The solution efficiently adsorbs generated gas, reducing swelling and explosion risks, maintaining battery safety and increasing energy density by minimizing non-ideal gas adsorption during assembly and replenishing electrolyte, thus enhancing lifespan.
Implementation Method 1
a gas adsorption material layer for adsorbing gas that is generated in a battery
Implementation Method 2
the blocking layer is dissolved by an electrolytic solution, whereby the gas adsorption material layer is exposed
Data Source
Figure 1~2
Figure 3~4
AI summary
Disclosed herein is a battery case in which an electrode assembly, including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, is received together with an electrolytic solution, wherein a gas adsorption layer is formed on the inner surface of the battery case, and the gas adsorption layer includes a gas adsorption material layer for adsorbing gas that is generated in a battery and a blocking layer formed on the outer surface of the gas adsorption material layer for preventing the gas adsorption material layer from being exposed to the outside.