Battery Cell Resin Insulator for Separator Turnover Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery cell manufacturing processes face challenges in preventing separator turnover during electrolyte solution injection, leading to potential short circuits and requiring multiple assembly steps, which increases component count and manufacturing complexity.
Innovation Solution
A battery cell design incorporating a resin insulator with a tubular shielding portion that communicates with the electrolyte solution injection hole, integrated with the terminal and sealing plate, reduces the number of assembly steps and prevents separator turnover by shielding the injection area, while also providing improved insulation and anchor effects through rough surface contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate insulating member with tubular body is provided to shield the electrolyte solution injection hole, then the separator is protected from being turned over, but the number of components and assembling steps increases
Solution Approach 1:
The patent combines the insulating member and the tubular shielding body into a single integrated component. The insulating member is formed with a tubular body that directly covers the electrolyte solution injection hole, eliminating the need for separate shielding components. This integration maintains the protective function while reducing component count and assembly steps.
Solution Approach 2:
The insulating member serves multiple functions simultaneously: it provides electrical insulation between the terminal portion and the sealing plate, acts as a tubular shield to prevent separator turnover during electrolyte injection, and provides structural support. This multi-functionality resolves the contradiction by achieving protection without adding separate components.
2Reliability
If multiple separate components are used for insulation and shielding, then the insulation and shielding functions are achieved, but the manufacturing process becomes more complex
Solution Approach 1:
The insulating member and tubular shielding body are manufactured as a single integrated component through molding processes. This consolidation simplifies the manufacturing process by reducing the number of parts to be produced, stored, and assembled, while maintaining both insulation and shielding functions.
Solution Approach 2:
The insulating member is designed to be attached to the sealing plate before the electrolyte solution injection process. This preliminary attachment ensures that the shielding function is already in place before injection begins, preventing separator turnover without requiring additional steps during the injection process itself.
3Strength
If a rough surface is provided on contact surfaces, then the anchor effect is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The rough surface treatment is applied selectively only to the contact surfaces of the insulating member that interface with the sealing plate and terminal portion. This localized treatment enhances the anchor effect at critical bonding interfaces without requiring the entire component to meet high surface finish specifications, thereby reducing overall manufacturing precision requirements.
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 effectively suppresses separator turnover and electrical short circuits, reduces the number of assembly steps, and enhances manufacturing efficiency by integrating components, thus improving the reliability and cost-effectiveness of battery cell production.
Implementation Method 1
a resin insulator having a first portion, a second portion, and a third portion, the first portion being a portion that insulates the terminal portion and the sealing plate from each other outside the exterior container, the second portion being a portion that insulates the current collector and the sealing plate from each other inside the exterior container
Implementation Method 2
at least a portion of a contact surface of the terminal portion or the sealing plate with the resin insulator has a rough surface
Implementation Method 3
the third portion of the resin insulator includes a shielding portion that shields between at least a portion of the electrolyte solution injection hole and the electrode assembly
Data Source
AI summary
A battery cell includes: a resin insulator having a first portion, a second portion, and a third portion, the first portion being a portion that insulates a terminal portion and a sealing plate from each other outside an exterior container, the second portion being a portion that insulates a current collector and the sealing plate from each other inside the exterior container, the third portion being a portion that has a tubular shape and that communicates with an electrolyte solution injection hole, wherein the third portion of the resin insulator includes a shielding portion that shields between at least a portion of the electrolyte solution injection hole and an electrode assembly, and the first portion, the second portion and the third portion of the resin insulator are molded to be integrated together.