Temperature sensing color changing photovoltaic module

A photovoltaic module and color light technology, used in photovoltaic power generation, electrical components, semiconductor devices, etc., can solve the problems of large workload, large laying area, and the impact of cooling treatment, so as to reduce the incidence of safety accidents and avoid unsafe accidents. , the effect of improving the yield

Active Publication Date: 2016-12-14
ZHONGTIAN PHOTOVOLTAIC MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Under normal circumstances, the working temperature of photovoltaic modules is 50~80°C, but in some areas with abundant sunlight, the temperature of the modules may be higher than 80°C, and the temperature distribution is extremely uneven, which affects the working efficiency of photovoltaic modules. In particular, the temperature of the battery sheet is higher than that of any other part of the whole component, and the relatively high temperature often affects the working efficiency of the component. Generally, the output power of the component will drop by 0.4% for every 1°C increase.
However, photovoltaic modules generally have a large laying area. We cannot know where the temperature in the module is high and where the temperature is low. This will affect the corresponding cooling treatment in the later stage. Therefore, we need to understand the temperature in different areas on the surface of the photovoltaic module. Changes
[0005] At present, the method of testing the temperature of components is relatively simple. Most of the staff use temperature detectors to measure at various points. Not only is the workload huge, but the data obtained is incomplete and inaccurate. More importantly, there may be heat stroke and electric shock. , burns and falls

Method used

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  • Temperature sensing color changing photovoltaic module

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preparation example Construction

[0027] The preparation method of the temperature-sensitive EVA film in the present invention is as follows: put all the materials into a high-speed mixer and mix evenly, then put the mixture into an extruder and dry it after granulating at 120°C, and put the dried particles into casting In the machine, cast at 120°C to form a film, after cooling, trimming and winding, then place it in a blast dryer for heat treatment at 70-100°C for 12 hours to obtain a pre-crosslinked temperature-sensitive EVA film.

[0028] The preparation method of the temperature-sensitive color-changing photovoltaic module in the present invention is as follows: the photovoltaic glass, EVA film, battery sheet, temperature-sensitive EVA film, white EVA film and back sheet are laminated in a laminator at 150°C for 15 minutes to obtain The thermochromic photovoltaic module.

Embodiment 1

[0031]Put 60 parts of EVA resin; 10 parts of reversible thermochromic powder; 8 parts of tackifier; 5 parts of crosslinking agent; 0.1 part of antioxidant; After leaving the machine, granulate and dry at 120°C, put the dried particles into the tape casting machine, cast at 120°C to form a film, cool, trim and roll, and then place it in a blast dryer at 70°C After heat treatment for 12 hours, a pre-crosslinked temperature-sensitive EVA film with a crosslinking degree of 40% was obtained.

Embodiment 2

[0033] Put 75 parts of EVA resin; 20 parts of reversible thermochromic powder; 9.5 parts of tackifier; 8 parts of crosslinking agent; 2 parts of antioxidant; After leaving the machine, granulate and dry at 120°C, put the dried particles into the tape casting machine, cast at 120°C to form a film, cool, trim and roll, and then place it in a blast dryer at 80°C After heat treatment for 12 hours, a pre-crosslinked temperature-sensitive EVA film with a crosslinking degree of 44% was obtained.

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Abstract

The invention discloses a temperature sensing color changing photovoltaic module. The photovoltaic module is composed of tampered glass, a transparent EVA adhesive film, crystalline silicon battery pieces, a temperature sensing EVA adhesive film, a white EVA adhesive film and a photovoltaic backboard from top to bottom in sequence, wherein the temperature sensing EVA adhesive film is a pre-cross-linking adhesive film with the cross-linking degree being 40-60%. The temperature sensing EVA adhesive film is additionally arranged in the photovoltaic module, and the photovoltaic module can carry out direct color changing display according to temperature values under irradiation of the sun, so that temperature changes in all areas on the photovoltaic module are known comprehensively, the work that working personnel carry out measurement point by point is omitted, and safety accidents are avoided.

Description

technical field [0001] The invention relates to a photovoltaic module, in particular to a thermochromic photovoltaic module. Background technique [0002] With the depletion of traditional fossil fuels, human beings are constantly looking for new energy alternatives. Solar energy is currently recognized as a green and renewable resource. The basic structure of solar photovoltaic modules is composed of photovoltaic tempered glass, upper EVA, crystalline silicon cells, lower EVA and photovoltaic backplane from top to bottom. [0003] Among them, the tempered glass and the upper and lower layers of EVA are colorless and transparent, and the back plate is generally made of white to improve the reflectivity, thereby improving the working efficiency of the battery module. In the entire solar photovoltaic module, the crystalline silicon cell plays a key role, and its function is to convert solar energy into electrical energy, and send it to the storage battery for storage, or to p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J123/08C09J11/06C09J11/04H01L31/048
CPCC08K3/16C08K5/1545C08K5/34928C09J7/00C09J11/04C09J11/06C09J123/0853C09J2203/322C09J2301/408C09J2423/04H01L31/0481Y02E10/50
Inventor 廖洁陈坤王同心杨继明张宪哲刘香安沙锐王怀伟冒艺孙万南王艳宁王强
Owner ZHONGTIAN PHOTOVOLTAIC MATERIALS
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