AED High-Voltage Potting for Durable Miniaturization

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Solution Overview

Problem

Existing automated external defibrillators (AEDs) face issues with durability and size due to the application of external impacts on connection points between the high voltage module and the outer housing, necessitating a larger external size and potential mechanical fixtures.

Innovation Solution

The AED incorporates a high voltage generator with a potting material covering the circuit board and terminals, directly fixed to the outer housing, eliminating the need for separate mechanical fixtures and reducing the overall size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a mechanical fixture (such as a screw) is used to fix the high voltage module to the outer housing, then the connection strength is improved, but the device complexity and external size increase

Engineering Contradiction:

Improveconnection strengthVSAvoiddevice complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent merges the fixation function and electrical insulation function into a single potting material. The potting material simultaneously secures the high voltage circuit board to the outer housing and provides electrical insulation, eliminating the need for separate mechanical fixtures and reducing device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The potting material serves multiple functions: it acts as a mechanical fixture to fix the high voltage module, provides electrical insulation between conductive parts, and offers shock resistance. This multi-functionality reduces the number of components needed in the system.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Strength

If a mechanical fixture is used to fix the high voltage module, then the connection strength is improved, but the external size of the AED increases

Engineering Contradiction:

Improveconnection strengthVSAvoidexternal size

Core Design Contradiction:

StrengthVSLength of stationary object

Solution Approach 1:

By combining the fixation function and electrical insulation function into the potting material, the patent eliminates the need for additional mechanical fixtures that would increase the external size of the AED.

Inventive Principle:

Principle #5Merging (Combining)

3Strength

If the high voltage module is fixed with a mechanical fixture, then the connection strength is improved, but the durability under impact is worsened

Engineering Contradiction:

Improveconnection strengthVSAvoiddurability under impact

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The potting material acts as a cushioning medium that absorbs impact forces before they reach the connection points between the high voltage module and outer housing. This beforehand cushioning protects the connection from damage during impact events, improving durability.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The patent uses composite materials by combining the potting material with the high voltage circuit board and outer housing. This composite structure distributes impact forces more effectively compared to simple mechanical fastening, improving overall durability.

Inventive Principle:

Principle #40Composite materials

4Reliability

If clearance is provided between the outer housing and high voltage module, then electrical insulation is improved, but the external size increases

Engineering Contradiction:

Improveelectrical insulationVSAvoidexternal size

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The potting material provides electrical insulation as one of its multiple functions, eliminating the need for additional clearance space that would increase the external size of the AED.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 configuration enhances durability and miniaturizes the AED while improving heat dissipation and reducing weight by ensuring electrical insulation and efficient heat transfer.

Implementation Method 1

the potting material covers the high voltage circuit board and a terminal of the high voltage electronic component, and is in contact with the high voltage circuit board and the outer housing

Methodology Applied

Scientific EffectElectrical insulation: Dielectric

Implementation Method 2

improving heat dissipation and reducing weight by ensuring electrical insulation and efficient heat transfer

Methodology Applied

Scientific EffectHeat conduction: Conduction (thermal)

Data Source

PatentUS12390652B2Automated external defibrillator

Publication Date: 2025.08.19 NIHON KOHDEN CORP

AI summary

An automated external defibrillator includes: a high voltage generator configured to charge or discharge electric energy for giving a subject an electric shock for defibrillation; an outer housing configured to house the high voltage generator and defining an exterior of the automated external defibrillator; and a potting material containing an insulating material. The high voltage generator includes: a high voltage circuit board; and a high voltage electronic component disposed on the high voltage circuit board. The potting material covers the high voltage circuit board and a terminal of the high voltage electronic component, and is in contact with the high voltage circuit board and the outer housing to fix the high voltage circuit board to the outer housing.