Vehicle Solar Panel Ignition Switch Circuit

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Solution Overview

Problem

Conventional solar panel systems for vehicles have low energy efficiency, short battery life, and are prone to corrosion, with existing anticorrosion methods being inefficient and visually unappealing.

Innovation Solution

An electric supplemental apparatus for vehicles that includes a solar panel connected to the battery via an ignition switch, with a circuit that manages energy flow to prevent overcharging and incorporates a shutter apparatus to adjust light input, using semiconductor diodes and resistors to control power output and circulation through the vehicle's metal body for corrosion prevention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the solar panel is constantly connected to the battery, then fuel efficiency is improved, but the battery may be overcharged and its lifetime reduced

Engineering Contradiction:
Improvefuel efficiencyVSAvoidbattery lifetime
Core Design Contradiction:
Use of energy by moving objectVSReliability

Solution Approach 1:

The patent implements a control system that monitors battery charge status and automatically controls the connection between solar panel and battery. The microcomputer detects battery voltage and current to determine charge state, then activates or deactivates the solar panel connection accordingly, preventing overcharge while maximizing energy utilization.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent makes the electrical connection dynamic rather than static. The solar panel's connection to the battery is automatically adjusted based on real-time operating conditions, allowing the system to transition between connected and disconnected states to optimize both energy efficiency and battery protection.

Inventive Principle:
Principle #15Dynamics

2Use of energy by moving object

If the solar panel output is increased to improve energy efficiency, then more electricity is supplied to the battery, but the durability of existing automobile devices may be compromised

Engineering Contradiction:
Improveenergy efficiencyVSAvoiddevice durability
Core Design Contradiction:
Use of energy by moving objectVSReliability

Solution Approach 1:

The patent applies partial action by controlling the solar panel output to match the actual energy needs of the battery and automobile devices. Rather than always operating at maximum capacity, the system adjusts the solar panel's electricity supply to provide only the necessary amount, preventing damage to existing devices while maintaining energy efficiency.

Inventive Principle:
Principle #16Partial or excessive action

Solution Approach 2:

The patent dynamically changes electrical parameters (voltage, current) based on battery charge status and device requirements. The control system adjusts these parameters in real-time to ensure the solar panel provides optimal power without exceeding the承受能力 of connected devices.

Inventive Principle:
Principle #35Parameter changes

3Object-affected harmful factors

If conventional anticorrosion methods are used, then corrosion protection is provided, but the exterior appearance is degraded and the method is visually unappealing

Engineering Contradiction:
Improvecorrosion protectionVSAvoidexterior appearance
Core Design Contradiction:
Object-affected harmful factorsVSShape

Solution Approach 1:

The patent extracts the anticorrosion function from traditional external protective coatings and relocates it to the electrical system. By using the solar panel's electrical output to generate protective current that flows through the vehicle body, the system provides corrosion protection without adding visible external layers or modifying the vehicle's exterior appearance.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces mechanical/chemical anticorrosion methods (coatings, platings) with an electrical method. The solar panel generates electrical current that circulates through the vehicle body, creating an electrochemical environment that prevents corrosion without requiring physical protective layers on the exterior surface.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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

Improves fuel efficiency, extends battery life, reduces corrosion, and maintains a visually appealing design by managing energy flow and using the vehicle's metal body for electric current circulation.

Implementation Method 1

a solar panel being provided with the vehicle; and an electric circuit connecting the ignition switch, the battery and the solar panel

Methodology Applied
Scientific EffectSolar energy conversion: Photovoltaic Effect

Implementation Method 2

an electric circuit connecting the ignition switch, the battery and the solar panel; wherein the electric circuit connects the battery and the solar panel in the case when a key in the ignition switch is in positions of 'on' and 'acc'

Methodology Applied
Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS7944169B2Solar-panel apparatus for a vehicle
Publication Date: 2011.05.17 SHIRAI TSUKASA
  • US7944169B2 patent drawing
  • US7944169B2 patent drawing
  • US7944169B2 patent drawing

AI summary

The positive and negative pole of the DC-battery 2-1 is allowed to connect the solar panel 2-11 and the solar panel 2-14 when the key position of the ignition switch 2-15 is in positions of “on” and “acc”. The positive and negative pole of the DC-battery 2-1 is not connected to the solar panel 2-11 and the solar panel 2-14 when the key position of the ignition switch 2-15 is in the position of “lock” and “start”. To attain such a configuration, lead wire connects the ignition switch 2-15 utilizing relay 2-4-a and fuse box 2-4-b. When the position of the ignition key is in “on” and “acc”, positive pole of the solar panels 2-11 and the solar panel 2-14 are connected to the positive pole of the DC battery 2-1 via the relay 2-4-b. Relays 3-4, 3-15, 3-16, 4-4, 4-15, and 4-16 are similar to the relay 2-4-b.