Battery Cell Electrode Terminal Through-Hole for Electrolyte Injection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The structure of battery cells is complex and prone to deformation during electrolyte injection, affecting the strength and efficiency of the housing.
Innovation Solution
Opening a through hole on the electrode terminal for electrolyte injection simplifies the structure, reduces deformation, and enhances the strength of the housing by using a circumferential welding portion that allows efficient electrolyte flow while minimizing heat generation and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the through hole is opened on the housing for electrolyte injection, then the injection process can be simplified, but the housing strength is reduced and deformation occurs during injection
Solution Approach 1:
The through hole is relocated from the housing to the electrode terminal, extracting the injection opening from the housing structure. This allows the housing to maintain its integrity and strength while the electrode terminal provides the injection access point, resolving the contradiction between injection ease and housing strength.
2Device complexity
If the structure of battery cells is simplified, then manufacturing complexity is reduced, but the housing becomes more prone to deformation during electrolyte injection
Solution Approach 1:
By extracting the through hole from the housing and placing it on the electrode terminal, the housing structure can be simplified without compromising stability. The electrode terminal assumes the function of providing injection access, allowing the housing to maintain a simpler, more stable structure.
Solution Approach 2:
The welding portion is designed to surround the through hole in advance, creating a reinforcement structure before electrolyte injection occurs. This preliminary reinforcement prevents housing deformation during the high-pressure injection process while maintaining overall structural simplicity.
3Productivity
If the first through hole is made larger to improve electrolyte injection efficiency, then injection speed increases, but the housing strength is further reduced
Solution Approach 1:
The through hole is moved to the electrode terminal, allowing it to be made larger for improved injection efficiency without compromising housing strength. The electrode terminal is designed to accommodate a larger opening while maintaining its structural integrity.
Solution Approach 2:
The welding portion surrounds the through hole to provide preliminary reinforcement, enabling the hole to be made larger for better injection efficiency while preventing housing deformation through the reinforcing structure.
4Reliability
If the welding portion completely seals the first through hole to improve electrical connection, then current capacity increases, but electrolyte injection efficiency is reduced
Solution Approach 1:
The welding portion is designed with local quality variation - it surrounds the through hole to provide electrical connection and structural reinforcement, but intentionally leaves gaps at certain positions. This allows different regions of the welding portion to serve different functions: electrical conduction and structural support versus fluid passage.
Solution Approach 2:
The welding portion provides partial sealing rather than complete sealing of the through hole. This partial action is sufficient to ensure electrical connection reliability and structural strength while leaving enough opening to maintain electrolyte injection efficiency.
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 approach reduces housing deformation, improves electrolyte injection efficiency, and enhances the current capacity and safety of the battery cell.
Implementation Method 1
the electrode terminal is electrically connected to the first tab through at least one first welding portion
Implementation Method 2
The electrode terminal is provided with a first through hole, where the first through hole is configured for injecting an electrolyte into the inner space of the housing
Data Source
AI summary
A battery cell includes an electrode assembly, a housing, and an electrode terminal. The electrode assembly includes a tab. The housing is configured to accommodate the electrode assembly. The electrode terminal is disposed in the housing and electrically connected to the tab. The electrode terminal is provided with a through hole, where the through hole is configured for injecting an electrolyte into an inner space of the housing.