Battery Electrolyte Impregnation Using Magnetic Bubble Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods struggle to effectively remove small bubbles on the surface of electrodes during electrolyte impregnation in secondary batteries, leading to incomplete impregnation and reduced battery performance, which can cause high resistance, heating, and explosion risks.
Innovation Solution
An electrolyte impregnation device using a magnetic field application part to generate magnetohydrodynamic convection, moving bubbles away from the electrode surface to a gas pocket portion, enhancing electrolyte impregnation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If vibration method is used to remove bubbles, then large-sized bubbles can be removed, but small-sized bubbles are generated and surface bubbles cannot be effectively removed
Solution Approach 1:
The patent replaces the mechanical vibration method with a magnetic field-based magnetohydrodynamic convection system. The magnetic field induces convection currents in the electrolyte that effectively remove bubbles of all sizes from electrode surfaces without generating additional small bubbles, thus substituting a mechanical approach with a field-based approach that avoids the harmful side effects.
Solution Approach 2:
The patent changes the physical parameters of the electrolyte by applying a magnetic field, which induces magnetohydrodynamic convection. This parameter change (introducing magnetic field strength and direction control) enables selective and effective bubble removal across different size ranges without the adverse effect of generating new small bubbles that occurs with vibration methods.
2Quantity of substance
If electrode loading amount is increased to achieve high energy density, then battery capacity improves, but electrolyte impregnation becomes difficult
Solution Approach 1:
The patent replaces conventional mechanical or passive impregnation methods with magnetohydrodynamic convection induced by magnetic fields. This enables effective electrolyte distribution even in high-loading electrode configurations where traditional methods fail, as the magnetic field-driven convection actively penetrates dense electrode structures.
Solution Approach 2:
By introducing magnetic field parameters (strength, direction, duration) into the impregnation process, the patent enables control over electrolyte distribution in high-loading electrodes. The magnetohydrodynamic convection parameters can be optimized to achieve complete impregnation regardless of electrode loading density.
3Reliability
If pre-aging time is extended to ensure complete impregnation, then electrode reaction performance improves, but manufacturing time and productivity decrease
Solution Approach 1:
The patent replaces time-dependent passive impregnation with active magnetic field-induced magnetohydrodynamic convection. This enables complete electrolyte impregnation and bubble removal in significantly reduced time while ensuring thorough electrode reaction performance, thus breaking the trade-off between reliability and productivity.
Solution Approach 2:
The patent applies magnetic field treatment during the pre-aging process to proactively remove bubbles and ensure complete impregnation before battery assembly. This preliminary action using magnetohydrodynamic convection eliminates the need for extended aging times, as the magnetic treatment pre-establishes optimal electrolyte distribution and removes obstacles to electrode reaction.
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 method improves electrolyte impregnation performance by effectively removing surface bubbles, reducing pre-aging time, and ensuring complete electrode assembly impregnation, thereby enhancing battery performance and safety.
Implementation Method 1
An electrolyte impregnation device using a magnetic field application part to generate magnetohydrodynamic convection, moving bubbles away from the electrode surface to a gas pocket portion
Data Source
AI summary
An electrolyte impregnation device of a secondary battery according to an embodiment of the present disclosure includes: a transfer part configured to move the secondary battery in a first direction; and a magnetic field application part for applying a magnetic field in a second direction to the secondary battery moved by the transfer part.A magnetic field is applied to an electrolyte flowing in a first direction, causing a magnetohydrodynamic convection flow in the electrolyte, especially a small magnetohydrodynamic convection flow near an electrode, such that, under the synergistic action of such flow force and the buoyancy force received by the bubbles, the bubbles on the surface of the electrode are moved to a gas pocket portion of the secondary battery, thereby removing the bubbles in the electrode assembly, thereby improving the impregnation performance of the electrolyte.