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
Engineering 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
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.
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.
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
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.
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.
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
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.
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.
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
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
Implementation Method 3
after the first thermoplastic material and the second thermoplastic material are cooled and shaped
Data Source
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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.