Battery Insulator With Through Holes For Short Circuit Prevention

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Solution Overview

Problem

Batteries face safety risks due to potential short circuits when the housing contacts the battery cell, and electrolyte infiltration into electrode plates is hindered by slow permeation, impacting performance.

Innovation Solution

Incorporating an insulator with through holes between the housing and battery cell to prevent direct contact and facilitate electrolyte infiltration, using materials like polypropylene or polyethylene terephthalate, and ensuring the holes are between 100 μm to 2000 μm in diameter to enhance safety and electrolyte penetration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the housing is directly connected to the battery cell tab, then electrical connection is achieved, but short circuit risk increases when the battery falls or vibrates

Engineering Contradiction:

Improveshort circuit preventionVSAvoidinsulator structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

An insulator is introduced as an intermediary component between the housing and battery cell tab. The insulator includes a through hole that allows the tab to pass through, maintaining electrical connection while preventing direct contact between the housing and tab that could cause short circuits during vibration or impact.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The insulator is designed with a through hole of specific diameter (greater than 100 μm and less than or equal to 2000 μm), creating a controlled porous structure that allows electrolyte permeation while maintaining mechanical insulation and electrical connection functionality.

Inventive Principle:

Principle #31Porous materials

2Productivity

If the housing is provided with an injection opening for electrolyte injection, then electrolyte can be injected, but infiltration into electrode plates is slow and impacted

Engineering Contradiction:

Improveelectrolyte infiltration speedVSAvoidinfiltration completeness

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The insulator creates a localized permeation pathway through the through hole, concentrating electrolyte flow at a specific location to enhance infiltration speed and completeness into the electrode plates while maintaining insulation elsewhere.

Inventive Principle:

Principle #3Local quality

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 insulator prevents short circuits, improves safety and service life by ensuring full electrolyte infiltration into battery cell electrode plates, maintaining good contact interfaces and enhancing battery performance.

Implementation Method 1

the insulator is located between the housing and the battery cell

Methodology Applied

Scientific EffectPhysical isolation: Physical Containment

Implementation Method 2

the insulator is provided with a through hole having a hole diameter greater than 100 μm and less than or equal to 2000 μm... infiltration of the electrolyte into electrode plates of the battery cell is impacted

Methodology Applied

Scientific EffectPermeation: Permeation

Data Source

PatentUS20230120508A1Battery and electric apparatus having such battery

Publication Date: 2023.04.20 NINGDE AMPEREX TECHNOLOGY LTD

AI summary

A battery includes a housing and a battery cell accommodated in the housing. The battery further includes an insulator accommodated in the housing, where the insulator is located between the housing and the battery cell and is provided with a through hole having a size greater than 100 μm and less than or equal to 2000 μm.