Battery Cell Structure With Electrolyte Absorbing Layer
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Solution Overview
Problem
The reliability of batteries is compromised due to electrochemical corrosion and liquid leakage caused by free electrolyte solution participating in reactions with metal particles or active substances, leading to reduced performance and safety concerns.
Innovation Solution
A battery cell design incorporating a liquid absorbing member between the electrode assembly and insulating member to absorb electrolyte solution, reducing its presence and minimizing electrochemical reactions, thereby enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If free electrolyte solution is present in the battery cell, then electrochemical reactions can occur between metal particles or active substances and the electrolyte, but this leads to corrosion and liquid leakage of the housing, reducing reliability
Solution Approach 1:
A liquid absorbing member is introduced as an intermediary component between the electrode assembly and the housing. This member absorbs free electrolyte solution, preventing direct contact between the electrolyte and the housing, thereby eliminating the harmful electrochemical reactions that cause corrosion and liquid leakage while maintaining the necessary electrochemical environment for battery operation
Solution Approach 2:
The liquid absorbing member converts the harmful presence of free electrolyte solution into a beneficial function by selectively absorbing excess electrolyte. The absorbed electrolyte is retained in a controlled manner, preventing leakage and corrosion while still allowing sufficient ionic conduction for battery operation, thus transforming a harmful factor into a protective mechanism
2Reliability
If the liquid absorbing member is positioned to absorb electrolyte solution, then the risk of corrosion and leakage is reduced, but the structural complexity of the battery cell increases
Solution Approach 1:
The liquid absorbing member is designed to perform multiple functions simultaneously: it absorbs free electrolyte solution to prevent corrosion, provides structural support between the electrode assembly and housing, and maintains proper spacing within the battery cell. By consolidating these functions into a single component, the overall structural complexity is minimized while achieving reliable protection against electrolyte-related damage
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 liquid absorbing member effectively reduces the risk of corrosion and leakage by absorbing excess electrolyte, ensuring higher reliability and safety of the battery cell.
Implementation Method 1
the liquid absorbing member can absorb the electrolyte solution located between the insulating member and the body
Data Source
AI summary
A battery cell includes a housing, an electrode terminal, an electrode assembly, an insulating member, and a liquid absorbing member, where the housing includes a first wall; the electrode terminal is arranged on the first wall; the electrode assembly includes a body and a tab extending out from the body, and the tab is electrically connected to the electrode terminal; the insulating member is arranged between the first wall and the electrode assembly and configured to isolate the first wall from the electrode assembly; and the liquid absorbing member is located between the body and the insulating member and configured to absorb an electrolyte solution.