Battery Cell Electrolyte Injection via Pressure Differential
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Solution Overview
Problem
Existing secondary battery manufacturing devices face inefficiencies in electrolyte injection and impregnation, particularly with slow-impregnation materials and high-viscosity electrolytes, leading to prolonged processing times and reduced productivity.
Innovation Solution
A manufacturing device and method that utilize a decompression chamber and pressure adjustment units to create a pressure difference, allowing rapid electrolyte injection and expansion of the battery cell capacity, enabling faster impregnation and sealing, thereby simplifying the process and improving productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electrolyte injection methods are used, then the injection process is simple, but the impregnation speed is slow and processing time is prolonged
Solution Approach 1:
The patent applies preliminary action by performing decompression of the battery cell before electrolyte injection. The decompression chamber reduces the pressure inside the cell to create a pressure difference that drives rapid electrolyte impregnation. This preliminary pressure reduction prepares the system for faster electrolyte uptake, transforming the slow conventional injection process into a rapid impregnation process.
Solution Approach 2:
The patent utilizes pneumatic principles by employing pressure difference between the decompression chamber and the electrolyte supply. The pressure gradient (lower pressure inside the cell, higher pressure at the electrolyte supply) drives the electrolyte into the cell rapidly. This pneumatic approach replaces slow diffusion-based impregnation with pressure-driven flow, significantly increasing impregnation speed.
2Productivity
If pressure difference method is used for rapid injection, then impregnation speed increases, but device complexity increases
Solution Approach 1:
The decompression chamber serves multiple functions: it acts as a vacuum chamber for pressure reduction, as a sealing environment for electrolyte injection, and as a control system for pressure differential creation. By making the chamber multi-functional, the patent avoids adding separate dedicated components for each function, thereby limiting the increase in device complexity while achieving rapid impregnation.
Solution Approach 2:
The decompression chamber acts as an intermediary device between the electrolyte supply system and the battery cell. It mediates the pressure difference required for rapid injection without requiring direct complex coupling between the electrolyte pump and the cell. This intermediary approach simplifies the overall system architecture compared to direct pressure injection methods.
3Loss of time
If decompression chamber is used, then rapid electrolyte injection is achieved, but manufacturing process complexity increases
Solution Approach 1:
The patent merges the decompression and electrolyte injection processes into a single integrated operation. The decompression chamber simultaneously performs pressure reduction and serves as the injection environment, combining what could be separate steps into one unified process. This merging reduces the overall yield cycle time while avoiding the complexity of coordinating multiple separate systems.
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 enables rapid electrolyte injection and impregnation, significantly reducing processing time and yield cycle, and enhances productivity even with slow-impregnation materials and high-viscosity electrolytes, by controlling pressures within the battery cell and decompression chamber.
Implementation Method 1
a first pressure adjustment unit configured to make a pressure in the battery cell lower than a pressure on the side of the electrolyte supply unit
Implementation Method 2
a second pressure adjustment unit configured to make a pressure outside the battery cell in the chamber lower than the pressure in the battery cell, thereby increasing the capacity of the battery cell
Data Source
AI summary
According to one embodiment, a manufacturing device for a battery, includes, an electrolyte supply unit which introduces an electrolyte into a cell, a chamber which accommodates the battery cell, a first pressure adjustment unit configured to make a pressure in the battery cell lower than a pressure on the side of the electrolyte supply unit, and a second pressure adjustment unit configured to make a pressure outside the battery cell in the chamber lower than the pressure in the battery cell, thereby increasing the capacity of the battery cell.