Electric Work Vehicle Battery Layout for Weight Balance

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Solution Overview

Problem

Electric work vehicles face challenges in balancing the front and rear weights due to the placement of batteries, which affects the vehicle's stability and center of gravity when transitioning to electric power systems.

Innovation Solution

The placement of a battery at the front portion of the traveling body, with a travel motor positioned below and an inverter located near the battery, allows for easier weight balancing and lower center of gravity, while a cover protects the components from debris. Additionally, a cable extends from the front portion of the battery to the inverter, and a motive power extraction shaft is provided for efficient power transmission to connected work devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the battery is placed at the front portion of the traveling body, then the front and rear weight balance is improved, but the cable routing complexity increases

Engineering Contradiction:
Improvefront and rear weight balanceVSAvoidcable routing complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The cable is routed not only horizontally from the battery but also vertically downward through a cable guide, creating a three-dimensional path that avoids interference with the inclined top plate and other components while maintaining compact front portion layout

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Stability of the object's composition

If the cable extends from the front portion of the battery, then the weight balance is improved, but the space for cable routing is reduced

Engineering Contradiction:
Improveweight balanceVSAvoidspace for cable routing
Core Design Contradiction:
Stability of the object's compositionVSVolume of moving object

Solution Approach 1:

The cable routing utilizes vertical space by guiding the cable downward from the battery's front portion, effectively using the third dimension (height) to resolve space constraints in the horizontal plane

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The cable is routed through a cable guide that channels it along a specific path, effectively using the cover structure as a flexible routing channel that adapts to spatial constraints

Inventive Principle:
Principle #30Flexible shells and thin films

3Ease of operation

If the inverter is placed below the battery on the body frontward side relative to the motor, then the cable connection is simplified, but the device complexity increases

Engineering Contradiction:
Improvecable connection easeVSAvoidcomponent arrangement complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The inverter is positioned in a specific location (below the battery and frontward relative to the motor) that optimizes cable connection while maintaining overall system organization and protecting components through the cover structure

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

This configuration enhances weight balance and lowers the center of gravity, improving the stability and operational efficiency of electric work vehicles, while protecting critical components and facilitating power delivery to attached work devices.

Implementation Method 1

a battery provided at a front portion of the traveling body to supply electric power to the motor

Methodology Applied
Scientific EffectBattery (electricity): Battery (electricity)

Data Source

PatentUS20240326571A1Electric work vehicle
Publication Date: 2024.10.03 KUBOTA CORP
  • US20240326571A1 patent drawing
  • US20240326571A1 patent drawing
  • US20240326571A1 patent drawing

AI summary

An electric work vehicle includes a travel motor provided on a traveling body, a battery provided at a front portion of the traveling body to supply electric power to the motor, a cable to extract electric power from the battery, and a cover to cover the battery and the cable. The cable extends from a front portion of the battery.