Integrated Resin Insulator for Battery Cell Electrolyte Injection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery cell manufacturing processes face challenges in preventing separator overturn during electrolyte solution injection, leading to short circuits while increasing the number of assembly steps.
Innovation Solution
A battery cell design incorporating a resin insulator with a tubular portion that integrates a first, second, and third portion, including a shielding portion that shields between the electrolyte solution injection hole and the electrode assembly, and a rough surface contact to enhance adhesion, reducing the number of components and assembly steps.
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 separator overturn is prevented, but the number of components and assembly steps increases
Solution Approach 1:
The patent combines the insulating member and the tubular body into a single integrated component. The insulating member has a tubular portion that receives the electrolyte solution injection hole, and a shielding portion that prevents separator overturn. This merging eliminates the need for separate insulating members and tubular bodies, reducing component count while maintaining both insulation and shielding functions
Solution Approach 2:
The insulating member is designed to perform multiple functions simultaneously: it provides electrical insulation, forms a tubular structure to receive the injection hole, and includes a shielding portion to prevent separator overturn. This multi-functional design replaces what would traditionally require multiple separate components
2Reliability
If multiple separate components are used for insulation and shielding, then functional requirements are met, but assembly steps increase
Solution Approach 1:
The insulating member integrates the tubular portion and shielding portion into a single piece, eliminating the need for separate assembly steps to install individual insulation components and shielding structures. The integrated design allows for fewer assembly operations while maintaining all required electrical insulation and shielding functions
3Strength
If a rough surface is provided on contact surfaces, then adhesion is improved, but manufacturing complexity increases
Solution Approach 1:
The patent modifies the surface parameter of the insulating member by providing a rough surface on specific contact surfaces. This surface roughening can be achieved through molding techniques that create a textured surface during the manufacturing process itself, rather than requiring post-manufacturing surface treatment. The rough surface enhances adhesion strength while the molding-based approach keeps manufacturing relatively simple
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 design effectively prevents separator overturn and short circuits during electrolyte injection, reducing assembly complexity and cost while maintaining structural integrity.
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
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
Figure 1~2
Figure 3~4
Figure 5
AI summary
A battery cell (100) includes: a resin insulator (800) having a first portion (810), a second portion (820), and a third portion (830), the first portion (810) being a portion that insulates a terminal portion (110) and a sealing plate (121) from each other outside an exterior container (120A), the second portion (820) being a portion that insulates a current collector (600, 700) and the sealing plate (121) from each other inside the exterior container (120A), the third portion (830) being a portion that has a tubular shape and that communicates with an electrolyte solution injection hole (120B1), wherein the third portion (830) of the resin insulator (800) includes a shielding portion (830A) that shields between at least a portion of the electrolyte solution injection hole (120B1) and an electrode assembly (200), and the first portion (810), the second portion (820) and the third portion (830) of the resin insulator (800) are molded to be integrated together.