Secondary Battery Case Layout for Uniform Electrolyte Distribution
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Solution Overview
Problem
Existing secondary batteries face challenges in uniformly distributing the electrolyte within the battery case, leading to inefficiencies in production time and productivity.
Innovation Solution
The secondary battery design incorporates a separate inlet and outlet portion in the case, with the outlet opposite the inlet, allowing for a longer electrolyte flow path and pressure differential to facilitate uniform distribution, using a discharge guide part to manage the electrolyte flow and sealing mechanisms to complete the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrolyte is supplied to the case without a separate outlet portion, then the case structure is simple, but the electrolyte cannot be uniformly distributed within the battery
Solution Approach 1:
The case is segmented into distinct functional portions: an inlet portion for electrolyte supply and a separate outlet portion for electrolyte discharge. This segmentation allows independent optimization of each portion's function, enabling uniform electrolyte distribution through the flow path while maintaining a relatively simple overall case structure.
Solution Approach 2:
The outlet portion acts as an intermediary component that facilitates uniform electrolyte distribution by creating a controlled discharge path. This intermediary structure enables the electrolyte to flow through the case in a manner that ensures even impregnation of the electrode assembly without requiring complex internal routing.
2Manufacturing precision
If electrolyte flow path is short, then the manufacturing process is fast, but the electrolyte cannot be uniformly distributed
Solution Approach 1:
The outlet portion is positioned at a location diagonally opposite from the inlet portion, utilizing spatial dimensionality to create an optimized flow path. This diagonal arrangement maximizes the flow path length through the case while maintaining efficient geometry, allowing uniform electrolyte distribution without excessive supply time.
3Reliability
If outlet portion is not sealed after electrolyte discharge, then the structure is simple, but electrolyte leakage may occur
Solution Approach 1:
The outlet portion utilizes the case's own structural features and materials to achieve sealing functionality. The sealing mechanism leverages the case's existing properties rather than requiring entirely separate sealing components, thereby ensuring reliable sealing while minimizing additional structural complexity.
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
This design enables rapid and uniform distribution of electrolyte within the battery, improving productivity by ensuring complete and even impregnation of the electrode assembly.
Implementation Method 1
allowing for a longer electrolyte flow path and pressure differential to facilitate uniform distribution
Data Source
AI summary
The present disclosure relates to a secondary battery, and a problem to be solved is to provide a secondary battery in which that an electrolyte supplied to the inside of the secondary battery can be uniformly distributed, and to a manufacturing method of a secondary battery. To this end, in the present disclosure, provided is a secondary battery comprising: an electrode assembly; and a case accommodating the electrode assembly, wherein the case comprises: an inlet portion that receives an electrolyte through an injection nozzle; and an outlet portion that forms a passage through which some of the electrolyte flowing into the inlet portion is discharged to an outside of the case.