Integrated Fuse Module for Compact Automotive Battery Mounting

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Solution Overview

Problem

Existing pre-fuse boxes in automotive applications are large and occupy valuable space in the engine compartment due to their configuration with flexible conductive leads, which is inefficient for compact designs.

Innovation Solution

An integrated fuse module with a compact design that mounts directly to the automobile battery without flexible conductors, featuring a mounting block, terminal post, fuse plate, and cover, allowing for overcurrent protection with a fusible element, and can be assembled by folding the fuse plate around the mounting block for a space-saving form factor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If flexible conductive leads are used to connect pre-fuse boxes to battery terminals, then electrical connections can be established, but the device occupies excessive space in the engine compartment

Engineering Contradiction:
Improvespace occupied by pre-fuse boxVSAvoidinstallation and connection ease
Core Design Contradiction:
Volume of moving objectVSEase of operation

Solution Approach 1:

The patent merges the pre-fuse box housing, mounting structure, and electrical connections into a single integrated unit that mounts directly to the battery terminal. This eliminates the need for separate flexible conductive leads and reduces the overall volume occupied in the engine compartment while maintaining electrical connection functionality.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The fuse module is nested directly onto the battery terminal structure, with the housing containing the fuse carrier and electrical components within a compact form factor. This nesting approach minimizes the space required compared to external connections with flexible leads.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Ease of manufacture

If conventional pre-fuse box configuration is used with flexible leads, then electrical connections are established, but material usage and manufacturing complexity increase

Engineering Contradiction:
Improvemanufacturing simplicityVSAvoidmaterial usage
Core Design Contradiction:
Ease of manufactureVSLoss of substance

Solution Approach 1:

The patent combines multiple components (housing, mounting structure, electrical connections) into a single integrated pre-fuse box unit. This reduces the number of separate parts that need to be manufactured and assembled, simplifying the manufacturing process and reducing material usage compared to conventional configurations with separate flexible leads.

Inventive Principle:
Principle #5Merging (Combining)

3Volume of moving object

If compact design is implemented by integrating fuse module directly to battery, then space is saved, but device complexity increases

Engineering Contradiction:
Improvespace occupied by fuse moduleVSAvoidintegration complexity
Core Design Contradiction:
Volume of moving objectVSDevice complexity

Solution Approach 1:

The patent segments the integrated fuse module into distinct functional components: a housing, a fuse carrier with blade fuses, a mounting structure with contact arms, and a cover. This segmentation allows for simplified manufacturing and assembly of each component while achieving a compact integrated form factor when assembled together.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The fuse carrier is nested within the housing, and the entire assembly mounts directly to the battery terminal. This nested structure achieves compactness while keeping individual components relatively simple in design and manufacture.

Inventive Principle:
Principle #7Nested doll (Nesting)

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 integrated fuse module provides effective overcurrent protection in a compact form, reducing space and material usage compared to conventional pre-fuse boxes, while protecting against ambient factors and electrical arcing.

Implementation Method 1

a fusible element providing overcurrent protection in a compact form

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Implementation Method 2

an arc suppressor containing an arc generated by the fusible element

Methodology Applied
Scientific EffectArc containment and extinction: Electric Arc

Data Source

PatentEP3685418B1Integrated fuse module
Publication Date: 2021.07.28 LITTELFUSE INC
  • EP3685418B1 patent drawingFigure 1
  • EP3685418B1 patent drawingFigure 2a~2b
  • EP3685418B1 patent drawingFigure 3~4a

AI summary

A fuse module including a mounting block formed of an electrically insulating material, a fuse plate including a fusible element disposed on a bottom surface of the mounting block, an input terminal electrically connected to the fusible element and extending along rear and top surfaces of the mounting block, and a fuse terminal electrically connected to the fusible element and extending from a front surface of the mounting block, the fuse module further including an electrically conductive terminal post extending from the top surface of the mounting block through the fuse terminal for facilitating connection to an electrical component.