Vehicle Hood Photovoltaic Module Molding Integration

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Solution Overview

Problem

Existing vehicle-mounted photovoltaic systems increase weight, wind resistance, and fuel/power consumption, and are limited in area integration, affecting the appearance and durability of electric vehicles.

Innovation Solution

A method for fabricating a photovoltaic module integrated into the vehicle body using a mold with thermoplastic materials, where the module is encapsulated between upper and lower molds under high temperature and pressure, allowing for seamless integration into vehicle components like hoods, doors, and roofs without increasing weight or fuel consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If photovoltaic modules are installed on brackets or directly pasted on the roof or body, then photovoltaic power generation is achieved, but the appearance is affected and weight increases leading to increased fuel consumption

Engineering Contradiction:
Improvefuel consumptionVSAvoidbracket structure
Core Design Contradiction:
Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent merges the photovoltaic module with the vehicle body by integrating it into the molding process of the body component itself. The photovoltaic module is embedded directly into the molded part during manufacturing, eliminating the need for separate brackets or mounting structures. This integration approach removes the additional weight and complexity of mounting hardware while maintaining power generation functionality.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The vehicle body component serves multiple functions: it provides structural support, maintains aesthetic appearance, and simultaneously houses the photovoltaic power generation system. By making the body component itself the integration substrate, the design achieves multi-functionality without requiring additional specialized structures for solar panel mounting.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If double-layer glass is used to encapsulate photovoltaic cells to form roof skylights, then photovoltaic integration is achieved, but the application is limited only to the roof

Engineering Contradiction:
Improveapplication areaVSAvoiddouble-layer glass structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The molding process integration approach is universally applicable to various vehicle body components including hoods, doors, fenders, and roofs. By embedding the photovoltaic module directly into the molding process of different body parts, the system can be deployed across the entire vehicle body surface area, not limited to just the roof as with glass encapsulation methods.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent changes the material state and processing parameters by using thermoplastic materials that can be molded at elevated temperatures. This allows the photovoltaic module to be integrated into complex three-dimensional body shapes that would be difficult or impossible to achieve with rigid double-layer glass structures, enabling application on various vehicle surfaces.

Inventive Principle:
Principle #35Parameter changes

3Reliability

If photovoltaic module is integrated into vehicle body using molding process, then full integration is achieved, but high temperature and pressure may cause deformation

Engineering Contradiction:
Improveintegration durabilityVSAvoidmodule deformation
Core Design Contradiction:
ReliabilityVSShape

Solution Approach 1:

The photovoltaic module undergoes pre-heating before being placed in the mold cavity. This preliminary thermal treatment brings the module to a temperature closer to the molding temperature, reducing the thermal shock and temperature differential during the molding process. This helps prevent deformation by allowing more gradual and uniform heating during encapsulation.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent introduces a buffering material between the photovoltaic module and the mold cavity wall. This intermediary layer acts as a thermal and mechanical buffer, distributing the heat and pressure more evenly during the molding process and preventing direct contact that could cause localized deformation or damage to the photovoltaic cells.

Inventive Principle:
Principle #24Intermediary (Mediator)

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

Enables full-body integration of photovoltaic power generation without deforming the module, reducing battery stress and fuel consumption, and expanding power generation area on electric vehicles.

Implementation Method 1

the two pieces of the first thermoplastic material and the second thermoplastic material forming the components of the vehicle body are preheated to soften them

Methodology Applied
Scientific EffectHeating: Heating

Implementation Method 2

The upper mold and the lower mold are driven to mold. The photovoltaic module is encapsulated into the first thermoplastic material and the second thermoplastic material under the operation of the high temperature and high pressure

Methodology Applied
Scientific EffectCompression: Compression

Implementation Method 3

after the first thermoplastic material and the second thermoplastic material are cooled and shaped

Methodology Applied
Scientific EffectCooling: Cooling

Data Source

PatentEP4527587A1Method for preparing photovoltaic module integrated with vehicle body
Publication Date: 2025.03.26 OPES SOLUTIONS GMBH
  • EP4527587A1 patent drawingFigure 1
  • EP4527587A1 patent drawingFigure 2
  • EP4527587A1 patent drawingFigure 3

AI summary

The present invention relates to a method for preparing a photovoltaic module integrated with a vehicle body. Using the hood as an example, a mold comprises an upper mold and a lower mold, the upper surface of the upper mold is a first forming surface, and the lower surface of the lower mold is a second forming surface; then, the two pieces are formed into a first thermoplastic material and a second thermoplastic material of a vehicle body element, which are heated in advance to be softened; the first thermoplastic material and the second thermoplastic material are moved to be between the upper mold and the lower mold, and the first thermoplastic material and the second thermoplastic material are clampingly fixed around the perimeter; the first thermoplastic material and the second thermoplastic material are made to attach to the second forming surface of the lower mold and the first forming surface of the upper mold, respectively; the upper mold and the lower mold are driven to close, and a photovoltaic module is packaged into the first thermoplastic material and the second thermoplastic material under the action of high temperature and high pressure; and a finished product is obtained after cooling and shaping. According to the present invention, by being completely integrated in a vehicle body, a streamlined design with minimal air resistance is achieved. In addition, by using the available surface area on the vehicle body, fuel or electric energy consumption by the vehicle is reduced.