Detachable Power Generation Unit Stop Mechanism for Electric Vehicles

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Solution Overview

Problem

Electrically driven vehicles equipped with detachable power generation units face safety concerns during installation and removal, particularly due to potential abnormal operations, vibration, noise, and risk of electric shock from high-voltage wires, which can lead to accidents.

Innovation Solution

The vehicle is designed with a stop mechanism for the power generation unit, a key switch for operation requests, and electromagnetic function generation means to control the power generation unit's operation, ensuring it is stopped during installation or removal, and preventing installation or removal when an operation request is made.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the power generation unit is detachably mounted on the vehicle, then the weight increase and energy efficiency deterioration are suppressed, but the battery may be short on energy during scheduled use

Engineering Contradiction:

Improveenergy efficiencyVSAvoidbattery energy sufficiency

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The power generation unit is operated in advance to charge the battery before the vehicle needs to operate. This preliminary charging action ensures that the battery has sufficient energy for scheduled use while maintaining the benefits of detachable mounting for energy efficiency.

Inventive Principle:

Principle #10Preliminary action

2Object-affected harmful factors

If the power generation unit is removed from the vehicle for remote charging, then exhaust and noise are prevented from being emitted in the tunnel, but the removal work may encounter unexpected danger

Engineering Contradiction:

Improveexhaust and noise emissionVSAvoidsafety during removal

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The stop means is activated in advance to bring the power generation unit to a stopped state before removal. This preliminary stopping action prevents abnormal operation, vibration, and noise during removal, thereby eliminating safety hazards while allowing remote charging to reduce exhaust and noise emission during vehicle operation.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The stop means acts as a protective measure that is put in place beforehand to cushion against potential safety incidents during removal. By ensuring the power generation unit is stopped before removal, the system prevents abnormal vibrations and noises that could cause accidents, thereby cushioning against harmful effects during the removal process.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Loss of time

If the power generation unit is operated during installation or removal, then the removal work can be performed quickly, but abnormal vibration and noise may cause accidents

Engineering Contradiction:

Improveremoval timeVSAvoidabnormal vibration and noise

Core Design Contradiction:

Loss of timeVSObject-affected harmful factors

Solution Approach 1:

The stop means is activated in advance to prevent the power generation unit from operating during installation or removal. This preliminary anti-action counteracts the temptation to operate the unit for speed, instead prioritizing safety by eliminating abnormal vibration and noise that could cause accidents.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The stop means converts the potential harm of operating the power generation unit during removal into a benefit by ensuring it is stopped. This prevents abnormal vibrations and noises, transforming a dangerous situation into a safe one, even if it requires additional time for proper shutdown and removal procedures.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 ensures safe installation and removal of the power generation unit by preventing unintended operation and electric shock, enhancing user and manufacturer safety.

Implementation Method 1

electromagnetic function generation means that faces the power generation unit installed in the vehicle, for generating an electromagnetic function

Methodology Applied

Scientific EffectElectromagnetic function generation: Electromagnetic Induction

Data Source

PatentEP2474433B1Electrically-driven vehicle

Publication Date: 2020.04.29 TOYOTA JIDOSHA KK

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AI summary

In ain electrically driven vehicle 1A equipped with a battery 12 usable for running, a power generation unit 11A of engine driven type that charges the batters is detachably mounted on the vehicle including a case where at least an engine 111 of the power generation unit 11A is detachably mounted, and the vehicle 1A includes first stop means for bringing the power generation unit 11A in a slopped state when the power generation unit 11A is instated in or removed from the vehicle, and a generation stop switch 22 for making an operation request to the power generation unit 11A. Morse specifically, the first stop means stops an operation request signal to the powder generation unit 11A through tow-vohage system wires when the generation stop switch 22 is ON (no operation request is made).