Battery Lid Assembly for Precise Electrode Terminal Positioning
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Solution Overview
Problem
Existing methods for manufacturing lids for electrical storage devices face challenges in accurately positioning the electrode terminal due to its small size and light weight, leading to potential misalignment during the insert molding process.
Innovation Solution
The proposed solution involves a lid design with a first part and a second part that sandwich the electrode terminal, allowing for precise positioning and secure joining through methods such as ultrasonic sealing, high-frequency sealing, or heat sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If insert molding of the lid is performed on the electrode terminal disposed in a mold, then the electrode terminal can be integrated into the lid, but the electrode terminal may shift in location with respect to the mold when the mold is filled with resin due to its small size and light weight
Solution Approach 1:
The patent applies preliminary action by pre-positioning the electrode terminal within a recess of the lid using a holding member before the insert molding process. This preliminary fixation prevents the electrode terminal from shifting when resin is injected into the mold, ensuring accurate positioning while still enabling integration into the lid structure.
Solution Approach 2:
The patent introduces a holding member as an intermediary element between the electrode terminal and the lid's recess. This holding member secures the electrode terminal in the desired position before molding, acting as a mediator that prevents direct displacement of the lightweight terminal during the resin filling process.
2Volume of moving object
If the electrode terminal is made small in size, then the electrical storage device can be compact, but the electrode terminal becomes difficult to accurately dispose at a predetermined location in the mold
Solution Approach 1:
The patent applies preliminary action by pre-positioning the small electrode terminal within a recess of the lid using a holding member before the insert molding process. This preliminary fixation prevents the small electrode terminal from shifting when resin is injected into the mold, ensuring accurate positioning despite its compact size.
Solution Approach 2:
The patent employs a flexible holding member that can adapt to secure the electrode terminal firmly in place. This holding member provides the necessary constraint to prevent displacement of the small terminal during molding while maintaining the compact overall design.
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 the electrode terminal to be accurately and securely positioned within the lid, ensuring reliable electrical connectivity and improved manufacturing efficiency.
Implementation Method 1
the lid and the electrode terminal are joined by at least one selected from ultrasonic sealing, high-frequency sealing, heat sealing, heat plate welding, and an adhesive
Implementation Method 2
the lid and the electrode terminal are joined by at least one selected from ultrasonic sealing, high-frequency sealing, heat sealing, heat plate welding, and an adhesive
Implementation Method 3
the lid and the electrode terminal are joined by at least one selected from ultrasonic sealing, high-frequency sealing, heat sealing, heat plate welding, and an adhesive
Data Source
AI summary
This lid body is used in an electric power storage device, the electric power storage device including: an electrode body; an electrode terminal electrically connected to the electrode body; and an outer packaging film wrapped around the electrode body so as to have an opening, the lid body being located in the opening and including a first part and a second part having the electrode terminal interposed therebetween so as to be able to input and output electric power via the electrode terminal.