Electrolyte Filling Port Inner Lid to Block Fragment Entry
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Solution Overview
Problem
Existing energy storage devices do not effectively prevent the entry of fragments of the electrolyte solution filling lid into the case through the electrolyte solution filling port, which can lead to performance deterioration during recycling.
Innovation Solution
Incorporating an insulating inner lid that protrudes outward from the case to cover the electrolyte solution filling port, and employing a manufacturing method that involves cutting a part of the first electrolyte solution filling lid, removing the inner lid, filling the case with electrolyte solution, and covering the opening with a second lid to prevent entry of cut pieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrolyte solution filling lid is used to seal the electrolyte solution filling port, then the filling port is sealed from the outside of the case, but fragments of the filling lid can enter the case through the filling port
Solution Approach 1:
An inner lid is introduced as an intermediary component between the electrolyte solution filling port and the electrolyte solution filling lid. The inner lid has a protruding shape that extends into the case interior, creating a physical barrier that prevents fragments from the filling lid from entering the case while still allowing the filling lid to seal the port effectively.
Solution Approach 2:
The sealing system is divided into two separate components: an inner lid that remains inside the case and provides fragment prevention, and an outer electrolyte solution filling lid that provides the sealing function. This segmentation allows each component to specialize in its specific function without compromising the other.
2Ease of manufacture
If the first electrolyte solution filling lid is cut to allow electrolyte solution filling, then the case can be filled with electrolyte solution, but cut pieces may enter the case
Solution Approach 1:
The inner lid serves as a protective intermediary during the electrolyte solution filling process. When the first electrolyte solution filling lid is cut to enable filling, the inner lid's protruding shape blocks cut pieces from entering the case interior, allowing the cutting operation to proceed safely.
Solution Approach 2:
The inner lid is installed beforehand to provide protective cushioning against potential fragment entry. This preventive measure is in place before any cutting or filling operations occur, ensuring that even if cutting generates fragments, they cannot compromise the case interior.
3Device complexity
If a simple filling lid is used without an inner lid, then the device structure is simpler, but there is no protection against fragment entry
Solution Approach 1:
The inner lid is designed to perform multiple functions simultaneously: it provides fragment prevention, serves as a sealing surface for the electrolyte solution filling lid, and can guide the positioning of the filling lid. This multi-functionality justifies the additional component by providing multiple benefits from a single addition.
Data Source
AI summary
An energy storage device including: a case including an electrolyte solution filling port that is for filling with an electrolyte solution; an electrolyte solution filling lid configured to seal the electrolyte solution filling port from an outside of the case; and an inner lid that is interposed between the electrolyte solution filling port and the electrolyte solution filling lid and covers the electrolyte solution filling port, in which the inner lid has an insulating property, and has a shape protruding outward of the case.