Under-Seat Battery Housing With Vibration Isolation for E-Motorcycles

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Solution Overview

Problem

The existing straddled electric vehicles face challenges in easy battery attachment and detachment, battery protection from pebbles and mud, and excessive vibration, which can lead to battery damage and failure.

Innovation Solution

The straddled electric vehicle design includes a battery case supported by a housing member via elastic members, with the battery installed below the seat to facilitate easy attachment and detachment, and at least part of the battery housed within the housing member to protect it from pebbles and mud, while the elastic members reduce vibration transmitted to the battery case.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If the battery is installed below the foot board, then the battery position is low, but it is not easy to attach and detach the battery

Engineering Contradiction:

Improvebattery position heightVSAvoidbattery attachment and detachment

Core Design Contradiction:

TemperatureVSEase of operation

Solution Approach 1:

The battery installation position is moved from below the foot board to below the seat, changing the vertical dimension of installation. This dimensional change raises the battery position to a more accessible height while maintaining protection through the housing member structure.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of operation

If the battery is installed below the seat, then it is easy to attach and detach the battery, but the battery is exposed to pebbles and mud

Engineering Contradiction:

Improvebattery attachment and detachmentVSAvoidexposure to pebbles and mud

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The battery is nested within the housing member structure. The housing member acts as a protective container that houses the battery, shielding it from pebbles and mud while allowing access through the opening at the rear end of the housing member.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The housing member serves as an intermediary structure between the battery and the external environment. It provides a protective barrier that filters out harmful factors like pebbles and mud while still allowing necessary access to the battery.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If the battery is installed below the seat outside the housing member, then the battery is exposed to pebbles and mud, but if installed inside the housing member, the battery may vibrate strongly

Engineering Contradiction:

Improveprotection from pebbles and mudVSAvoidbattery vibration

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The elastic member is installed in advance between the housing member and the battery to provide cushioning. This pre-installed elastic element absorbs vibrations and shocks before they reach the battery, protecting it from strong vibrations while maintaining the protective housing structure.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The elastic member acts as an intermediary element between the housing member and the battery. It transmits necessary structural support while filtering out harmful vibrations, serving as a buffer zone that protects the battery from excessive vibration.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Device complexity

If the housing member is reduced to a small size, then interference between the battery and housing member is prevented, but the housing member cannot adequately protect the battery from pebbles and mud

Engineering Contradiction:

Improvehousing member sizeVSAvoidprotection from pebbles and mud

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The housing member is designed with non-uniform structure - the front end has a larger size to provide adequate protection from pebbles and mud, while the rear end has a smaller opening dimension to accommodate the battery. This local variation in dimensions satisfies both protection and space requirements.

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 design allows for easy battery access, protects the battery from environmental hazards, and effectively reduces vibration, thereby preventing damage and ensuring reliable operation.

Implementation Method 1

a battery case that supports the battery; wherein the battery case is supported by the housing member via an elastic member

Methodology Applied

Scientific EffectVibration reduction through elastic member: Damping

Data Source

PatentEP4417497A1Straddled electric vehicle

Publication Date: 2024.08.21 YAMAHA MOTOR CO LTD

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AI summary

There is disclosed a straddled electric vehicle (1) including a vehicle body frame (21), a seat (5), a housing member (31), an electric motor (12), a battery (45), a battery case (51), and an elastic member (61); the housing member (31) being supported by the vehicle body frame (21);the housing member (31) being installed below the seat (5);the electric motor (12) propelling the straddled electric vehicle (1); the battery (45) supplying power to the electric motor (12); the battery (45) being installed below the seat (5); at least part of the battery (45) being installed in an internal space (32) of the housing member (31); the battery case (51) supporting the battery (45); the battery case (51) being supported by the housing member (31) via an elastic member (61).