Adsorption Assembly with Gas Permeable Housing for Battery Safety
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Solution Overview
Problem
Current battery designs face challenges in safely managing gas production, as side reactions between organic solvents and electrode materials lead to gas buildup, compromising the reliability and safety of the battery, especially in large-scale applications where the aluminum plastic film packaging is inadequate.
Innovation Solution
An adsorption assembly is introduced, comprising a housing with a gas-permeable membrane that encapsulates an adsorbent, such as molecular sieves, to effectively absorb produced gases within the battery, preventing liquid leakage and enhancing safety and reliability by isolating the adsorbent from external environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the aluminum plastic film packaging is used to contain gas production, then the battery structure is simple, but the reliability deteriorates when large amounts of gas are produced
Solution Approach 1:
The patent introduces an adsorbent as an intermediary substance between the gas production source and the packaging film. The adsorbent captures and retains gases produced during battery operation, preventing direct pressure buildup against the aluminum plastic film seal, thereby maintaining seal reliability without requiring a more complex packaging structure
Solution Approach 2:
The patent employs porous adsorbent materials with high surface area and adsorption capacity to effectively capture battery gases. The porous structure allows the adsorbent to absorb large volumes of gas molecules, preventing gas accumulation that would otherwise compromise the simple aluminum plastic film packaging
2Productivity
If the adsorbent is directly exposed to the electrolyte, then the gas absorption capacity is high, but the adsorption performance deteriorates due to side reactions
Solution Approach 1:
The patent introduces a housing as an intermediary barrier between the adsorbent and the electrolyte. This housing allows the adsorbent to maintain high gas absorption capacity while preventing direct contact with the electrolyte that would cause side reactions and degrade adsorption performance
Solution Approach 2:
The patent uses a housing structure that acts as a protective shell around the adsorbent. This housing is designed to be permeable to gases while impermeable to the electrolyte, allowing gases to reach the adsorbent for absorption while preventing electrolyte contact that would harm the adsorbent's performance
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 adsorption assembly effectively absorbs gases produced inside the battery, preventing seal breakage and extending the battery's lifetime by improving its reliability and safety, even in scenarios with significant gas production.
Implementation Method 1
the housing includes a gas permeable portion through which internal gas and external gas of the adsorption assembly are exchanged
Implementation Method 2
the adsorption assembly can effectively adsorb the produced gas inside the battery
Data Source
AI summary
An adsorption assembly and a battery are provided. The adsorption assembly includes: a housing including a gas permeable portion; and an adsorbent encapsulated by the housing. The adsorption assembly can effectively isolate the adsorbent from the external environment by providing the housing, thereby preventing the adsorption performance of the adsorbent from being affected, and the housing includes a gas permeable portion, which can make the produced gas in the external environment enter the housing and be effectively adsorbed by the adsorbent. In particular, when the adsorbent is used for a battery, especially a soft pack battery, the gas produced inside the battery can be effectively adsorbed to prevent liquid leakage of the battery seal caused by breakage of the battery seal by gas, improving reliability and safety of the battery and extending lifetime of the battery.