CN111176048A - Self-driven electrochromic glass utilizing temperature difference for power generation and device - Google Patents
Self-driven electrochromic glass utilizing temperature difference for power generation and device Download PDFInfo
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- CN111176048A CN111176048A CN202010129139.1A CN202010129139A CN111176048A CN 111176048 A CN111176048 A CN 111176048A CN 202010129139 A CN202010129139 A CN 202010129139A CN 111176048 A CN111176048 A CN 111176048A
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- electrochromic glass
- power generation
- thermoelectric power
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor
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- Nonlinear Science (AREA)
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- Optics & Photonics (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
本发明涉及电致变色玻璃技术领域，提供一种利用温差发电自驱的电致变色玻璃，包括电致变色玻璃层和温差发电组件，所述温差发电组件的电压输出端与电致变色玻璃层的电压控制端之间连接有自驱动控制电路。本发明电致变色玻璃在工作状态下，其室内侧和室外侧具有30~50摄氏度左右的温差，配合温差发电组件，可以将温差转化为电能，输出5V以内的直流电压。
The invention relates to the technical field of electrochromic glass, and provides an electrochromic glass self-driven by using thermoelectric power generation, comprising an electrochromic glass layer and a thermoelectric power generation component, wherein a voltage output end of the thermoelectric power generation component is connected to the electrochromic glass layer. A self-driving control circuit is connected between the voltage control terminals of the . In the working state, the electrochromic glass of the present invention has a temperature difference of about 30-50 degrees Celsius between the indoor side and the outdoor side, and with the thermoelectric power generation components, the temperature difference can be converted into electric energy, and a DC voltage within 5V can be output.
Description
Technical Field
The invention relates to the technical field of electrochromic glass, in particular to electrochromic glass capable of generating power by using temperature difference and self-driving and a device.
Background
Electrochromism refers to the phenomenon that under the action of an external voltage, charged ions and a material are doped and dedoped, so that the material undergoes an oxidation-reduction reaction, and further the optical performance of the material reversibly changes in a visible light infrared absorption area. Which macroscopically appears as a change in color and transparency. The electrochromic glass prepared by the performance can intelligently adjust the radiation of sunlight, selectively absorb or reflect external heat radiation, reduce the energy consumption of buildings or vehicles, and solve the problems of light pollution and dazzling which are gradually serious. Therefore, the electrochromic glass has huge market prospect and energy-saving significance.
The commercial all-solid-state electrochromic glass adopts tungsten trioxide as an electrochromic film, and when a device is colored, more than 97% of infrared light and visible light can be absorbed, so that solar energy is converted into heat energy. The outer surface temperature of the electrochromic glass can reach more than 80 ℃, and can exceed 90 ℃ in the midday summer in the south of China. In order to prevent heat convection and heat transfer, when the electrochromic glass is used for curtain walls and windows, the electrochromic glass can be prepared into hollow glass, one side of the electrochromic glass is used as the outdoor side, most heat can be blocked by the hollow cavity to enter the indoor side, and the temperature of the glass on the indoor side is lower and can be maintained at 30-50 ℃.
Disclosure of Invention
Problems to be solved by the invention
After the electrochromic product absorbs more than 97% of infrared light and visible light, the temperature difference between the outdoor side glass and the indoor side glass is very large, and energy is wasted.
Therefore, the invention aims to provide self-driven electrochromic glass utilizing temperature difference power generation, which converts temperature difference into electric energy by a built-in temperature difference power generation assembly.
Means for solving the problems
The electrochromic glass capable of generating power by utilizing temperature difference and driving by self comprises an electrochromic glass layer, wherein a temperature difference power generation assembly is arranged on one indoor side of the electrochromic glass layer, a first binding surface in a certain area is arranged between the hot end surface of the temperature difference power generation assembly and the electrochromic glass layer, and a self-driving control circuit is connected between the voltage output end of the temperature difference power generation assembly and the voltage control end of the electrochromic glass layer;
the self-driven control circuit comprises a DC-DC converter, a voltage stabilizing circuit, a microprocessor and an electrochromic glass control circuit which are sequentially connected, wherein the input end of the DC-DC converter is connected with the voltage output end of the temperature difference power generation assembly, the first output end of the DC-DC converter is connected with the input end of the voltage stabilizing circuit, the second output end of the DC-DC converter is connected with the first input end of the electrochromic glass control circuit, the output end of the voltage stabilizing circuit is connected with the input end of the microprocessor, the second input end of the electrochromic glass control circuit is connected with the output end of the voltage stabilizing circuit, and the output end of the electrochromic glass control circuit is connected with the voltage control end of the electrochromic glass layer.
The electrochromic glass capable of generating power by utilizing temperature difference and driving by self comprises a hollow glass layer and an electrochromic glass layer which are superposed, wherein a hollow cavity is formed between the hollow glass layer and the electrochromic glass layer through a parting bead; a self-driven control circuit is connected between the voltage output end of the temperature difference power generation assembly and the voltage control end of the electrochromic glass layer;
the self-driven control circuit comprises a DC-DC converter, a voltage stabilizing circuit, a microprocessor and an electrochromic glass control circuit which are sequentially connected, wherein the input end of the DC-DC converter is connected with the voltage output end of the temperature difference power generation assembly, the first output end of the DC-DC converter is connected with the input end of the voltage stabilizing circuit, the second output end of the DC-DC converter is connected with the first input end of the electrochromic glass control circuit, the output end of the voltage stabilizing circuit is connected with the input end of the microprocessor, the second input end of the electrochromic glass control circuit is connected with the output end of the voltage stabilizing circuit, and the output end of the electrochromic glass control circuit is connected with the voltage control end of the electrochromic glass layer.
Furthermore, the thermoelectric generation assembly adopts one or more thermoelectric generation pieces, the thermoelectric generation piece comprises a plurality of thermoelectric generation units connected in series, and in a single thermoelectric generation piece, the thermoelectric generation unit at the head end connected in series and the thermoelectric generation unit at the tail end connected in series are both connected with the DC-DC converter through the electric connection assembly.
Preferably, the electrical connection assembly comprises two non-intersecting flow guide strips arranged on the surface of the electrochromic glass layer, and two lead wires respectively used for electrically connecting one flow guide strip with the head-end thermoelectric generation unit and the other flow guide strip with the tail-end thermoelectric generation unit.
Further, a third output end of the DC-DC converter is connected with a storage circuit.
An apparatus comprising a housing having the electrochromic glazing of claim mounted therein.
Preferably, the frame is one of a door and window frame, a window frame and a skylight frame.
According to the technical scheme, in the working state of the electrochromic glass, the temperature difference between the indoor side and the outdoor side is about 30-50 ℃, and the temperature difference can be converted into electric energy by matching with the temperature difference power generation assembly, so that the direct-current voltage within 5V is output.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic structural view of the heat-conducting block of FIG. 1;
FIG. 3 is a schematic structural view of example 2;
fig. 4 is a schematic structural view of embodiment 3.
FIG. 5 is a schematic view of the structure of FIG. 4 with the addition of a heat-conducting block;
FIG. 6 is a schematic structural view of a thermoelectric generation element with leads arranged by a tie bar;
FIG. 7 is a schematic structural view of a thermoelectric generation chip;
FIG. 8 is a block diagram of a self-driven control circuit;
fig. 9 is an electrical schematic diagram of the self-driven control circuit.
Detailed Description
The present invention will be described in detail with reference to the drawings and specific embodiments, wherein prior to describing embodiments of the present invention in detail, the terms and terminology used herein are used to explain the same or similar structures and components with the same names or same reference numbers for illustrative purposes only.
The electrochromic glass layer is one of monolithic all-solid electrochromic glass, gel electrolyte electrochromic glass, liquid electrolyte electrochromic glass or organic electrochromic material electrochromic glass.
The hollow glass layer can be toughened glass, semi-toughened glass, non-toughened glass, antireflection glass, colored glass, low-emissivity glass and organic glass, and can also be laminated glass or hollow glass (a three-glass two-cavity structure is formed and the like) formed by the glass.
As shown in fig. 7, the thermoelectric generation module 2 may employ one or more thermoelectric generation sheets including a plurality of thermoelectric generation units 21 connected in series.
The thermoelectric generation is a green power generation technology which directly converts heat energy into electric energy by utilizing a certain temperature gradient, and the thermoelectric generator is a power generation device which directly converts the heat energy into the electric energy by utilizing the Seebeck effect. The thermoelectric generation piece is formed by connecting a p-type thermoelectric element and an n-type thermoelectric element at the hot end by metal conductor electrodes and connecting cold end electrodes at the cold ends respectively. A plurality of thermoelectric power generation units are connected in series to form a thermoelectric power generation sheet capable of outputting a certain voltage. The thermoelectric power generation piece is commercially available, is of a sheet structure with a certain thickness, and is provided with two leads on two sides, namely a hot end face and a cold end face respectively, and the leads can output electric energy when the hot end face is in contact with high temperature and the cold end face is in contact with low temperature.
In the invention, in a single thermoelectric generation piece, the series-connected head end thermoelectric generation unit 22 and the series-connected tail end thermoelectric generation unit 23 are both connected with an external circuit through the electric connection component 3.
Example 1
As shown in fig. 1, the electrochromic glass of the present embodiment includes an electrochromic glass layer 1, a thermoelectric generation assembly 2 is disposed on one side of the electrochromic glass layer facing the room, a hot end face of the thermoelectric generation assembly is in contact with the electrochromic glass layer, and a cold end face of the thermoelectric generation assembly is in contact with the indoor air. Due to the heat absorption characteristic of the electrochromic glass, the temperature of the outer surface of the electrochromic glass can reach over 80 ℃ in summer and can exceed 90 ℃ in the midday in summer in the south of China, the temperature difference between the indoor side and the outdoor side of the electrochromic hollow glass is about 30-50 ℃ in the working state, and the temperature difference can be converted into electric energy by matching with a temperature difference generating component to output direct current voltage within 5V.
And a self-driven control circuit 5 is connected between the voltage output end of the temperature difference power generation component 2 and the voltage control end of the electrochromic glass layer 1.
As shown in fig. 8 and 9, the self-driven control circuit 5 includes a DC-DC converter 51, a voltage stabilizing circuit 52, a microprocessor 53, and an electrochromic glass control circuit 54, which are connected in this order. The temperature difference power generation assembly 2 is led out of a positive and negative electrode wire (interface I) for power generation output, and the electrochromic glass layer 1 is led out of a positive and negative electrode wire (interface II) for color change control. The first interface and the second interface are conveniently butted with the control circuit, and electric energy generated by the thermoelectric generation assembly is transmitted to the self-driven control circuit through the first interface.
The input terminal of the DC-DC converter 51 is connected to the voltage output terminal of the thermoelectric generation module 2, and is used for converting the input voltage (which is determined by the thermoelectric generation module, and is generally between 1v and 5 v) into a power supply with a suitable voltage. The first output end of the DC-DC converter 51 is connected to the input end of the voltage regulator circuit 52, the voltage supplied to the voltage regulator circuit is determined according to the selection of the microprocessor, and the voltage supplied to most of the microprocessors is 3.3v or 5v, so that the voltage supplied to the voltage regulator circuit is higher than 3.3v or 5v by more than 0.5 v. The output end of the voltage stabilizing circuit 52 is connected with the input end of the microprocessor 53, and the output end of the microprocessor 53 is connected with the second input end of the electrochromic glass control circuit 54 and is used for controlling the electrochromic glass layer to change color. The voltage supplied to the electrochromic glass control circuit is generally higher than 3v, and can be the same as (communicated with) the input voltage of the voltage stabilizing circuit to save cost. According to the size difference, batch difference and customer requirement difference of the electrochromic glass, a control program in a microprocessor is changed, and the microprocessor in the embodiment adopts STM32F103C8T 6.
A second output of the DC-DC converter 51 is connected to a first input of an electrochromic glazing control circuit 54 and can be used to power the electrochromic glazing control circuit.
The electrochromic glass control circuit 54 changes the input fixed voltage into a variable voltage according to the control requirement, wherein the variable voltage can be negative voltage or positive voltage, and controls the electrochromic glass layer to change color through the second interface.
A third output terminal of the DC-DC converter 51 is connected to an energy storage circuit 55, which supplies power to the energy storage circuit for storing excess electric energy.
In this embodiment, the electrical connection component 3 may directly adopt a lead wire, and may also adopt a form of a lead wire and a diversion strip, referring to fig. 6, the specific structure is as follows:
the electrical connection assembly 3 comprises two non-intersecting flow guide strips 31 and 32 arranged on the surface of the electrochromic glass layer 1, and two lead wires 33 respectively used for electrically connecting one flow guide strip 31 with the head-end thermoelectric generation unit 22 and the other flow guide strip 32 with the tail-end thermoelectric generation unit 23. The diversion strip can be made of conductive paste cured by heating or ultraviolet curing, or a metal strip attached to the surface of the glass protects the flexible circuit board. The lead 33 and the conducting bars 31 and 32 can be electrically connected by welding or conductive adhesive. Therefore, the position of the lead can be reasonably arranged, and the inconvenience in use caused by overlong lead or tilting of the lead is prevented.
As shown in fig. 2, a heat conduction block 4 may be further disposed between the hot end face of the thermoelectric generation assembly 2 and the electrochromic glass layer, and the heat conduction block, the thermoelectric generation sheet, and the glass surface are directly fixed by an adhesive.
For efficient thermoelectric generation, a first bonding surface in a certain area is required between the hot end surface of the thermoelectric generation assembly 2 and the electrochromic glass layer, and the first bonding surface is arranged in the color-changing area of the electrochromic glass layer, preferably in an area which has a longer sunlight irradiation time and does not directly block the sight. The area of the first binding surface accounts for 0.01% -20% of the area of the color-changing area of the electrochromic glass layer.
Example 2
As shown in fig. 3, the difference between the embodiment 2 and the embodiment 1 is that the electrochromic glass layer 1 is laminated with a laminated glass substrate 7 through an adhesive layer 6 towards the indoor side, and a second bonding surface of a certain area is arranged between the cold end surface of the thermoelectric generation assembly 2 and the laminated glass layer.
Example 3
As shown in fig. 4, the electrochromic glass of this embodiment includes an electrochromic glass layer 1 and a hollow glass layer 8, which are stacked, the hollow glass layer is located on one side of the electrochromic glass layer close to the room, a hollow cavity 10 is formed between the hollow glass layer and the electrochromic glass layer through a spacer 9, a thermoelectric generation assembly is arranged between the electrochromic glass layer and the hollow glass layer, a hot end face of the thermoelectric generation assembly is in contact with the electrochromic glass layer, and a cold end face of the thermoelectric generation assembly is in contact with the hollow glass layer. Due to the heat absorption characteristic of the electrochromic glass, the temperature of the outer surface of the electrochromic glass can reach over 80 ℃ in summer and can exceed 90 ℃ in the midday in summer in the south of China, the temperature difference between the indoor side and the outdoor side of the electrochromic hollow glass is about 30-50 ℃ in the working state, and the temperature difference can be converted into electric energy by matching with a temperature difference generating component to output direct current voltage within 5V.
And a laminated glass substrate can be further superposed on one side of the electrochromic glass layer 1 facing outdoors to form laminated hollow glass.
In this embodiment, the electrical connection component 3 may directly adopt a lead wire, the lead wire is led out through a through hole formed in the spacer, or may adopt a form of a lead wire and a flow guide strip, and refer to fig. 6, which is consistent with the structure of embodiment 1.
As shown in fig. 5, a heat conduction block 4 may be further disposed between the hot end face of the thermoelectric generation assembly 2 and the electrochromic glass layer, and similarly, a heat conduction block may be further disposed between the cold end face of the thermoelectric generation assembly and the hollow glass layer, and the heat conduction block, the thermoelectric generation sheet, and the glass surface are directly fixed by a binder.
For efficient thermoelectric generation, a first bonding surface in a certain area is required between the hot end surface of the thermoelectric generation assembly 2 and the electrochromic glass layer, and the first bonding surface is arranged in the color-changing area of the electrochromic glass layer, preferably in an area which has a longer sunlight irradiation time and does not directly block the sight. The area of the first binding surface accounts for 0.01% -20% of the area of the color-changing area of the electrochromic glass layer.
And a second binding surface in a certain area is arranged between the cold end surface of the thermoelectric generation assembly 2 and the hollow glass layer.
The invention also provides a device comprising a frame body, wherein the electrochromic glass of the embodiment 1, 2 or 3 is installed in the frame body, and the frame body is one of a door and window frame body, a window frame body and an automobile skylight frame body.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010129139.1A CN111176048A (en) | 2020-02-28 | 2020-02-28 | Self-driven electrochromic glass utilizing temperature difference for power generation and device |
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| CN202010129139.1A CN111176048A (en) | 2020-02-28 | 2020-02-28 | Self-driven electrochromic glass utilizing temperature difference for power generation and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112005799A (en) * | 2020-09-10 | 2020-12-01 | 杨曼曼 | Sunshine protection device is prevented to seedling of gobi desert afforestation |
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Application publication date: 20200519 |