Liquid cooling device applied to photovoltaic module

Abstract

The utility model discloses a liquid cooling device applied to a photovoltaic assembly, and relates to the technical field of photovoltaic assemblies, the liquid cooling device comprises a photovoltaic assembly, a liquid cooling plate and a fire pool, the photovoltaic assembly comprises a photovoltaic panel and a photovoltaic backboard, and the photovoltaic panel is attached to the front side of the photovoltaic backboard; the liquid cooling plate comprises a heat conduction plate and liquid flow channels, the heat conduction plate is attached to the back face of the photovoltaic back plate, the liquid flow channels are of an S-shaped curve structure and are evenly distributed in the heat conduction plate, the pipe diameter of each liquid flow channel is smaller than or equal to 6 mm, and a liquid inlet and a liquid outlet are formed in the two ends of each liquid flow channel respectively. The liquid inlet is communicated to the water bottom of the fire pool through a liquid inlet pipe, a water pump is installed on the liquid inlet pipe, and the liquid outlet is communicated to the water surface of the fire pool through a liquid outlet pipe. And heat-conducting silicone grease is coated between the photovoltaic back plate and the heat-conducting plate. According to the utility model, the liquid cooling technology is utilized, the photovoltaic assembly is always kept at the optimal working temperature, the illumination receiving of the photovoltaic assembly is not influenced, and the power generation efficiency of the photovoltaic assembly is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic modules, and in particular to a liquid cooling device applied to photovoltaic modules. Background Art

[0002] In the summer, the back surface temperature of solar cell modules can reach 70°C, while the operating temperature of solar cells can reach 100°C. However, the higher the temperature, the lower the open-circuit voltage of the photovoltaic module, affecting the peak power of the photovoltaic module. The nominal peak power of a photovoltaic module is measured under Standard Test Conditions (STC), that is, an ambient temperature of 25°C. According to the photovoltaic module efficiency calculation formula, the peak power loss rate of the photovoltaic module at this condition is approximately 30%. Similarly, in winter, the power of the photovoltaic module will also be lost due to low temperatures. Therefore, the closer the operating temperature of the photovoltaic module is to 25°C, the better the power generation.

[0003] Currently, large-scale, high-energy-consuming, high-emissions factories in China, such as those in the chemical, building materials, steel, and nonferrous metal industries, are responding to the national call for energy conservation and emissions reduction by investing in distributed photovoltaic power generation systems within their factories to increase their use of green electricity. Furthermore, to meet fire protection requirements, factories are equipped with fire water tanks, which can be fully utilized to install liquid cooling devices for photovoltaic modules. Utility Model Content

[0004] The purpose of the present invention is to provide a liquid cooling device for photovoltaic modules to solve the above-mentioned defects caused by the prior art.

[0005] A liquid cooling device for photovoltaic modules, comprising a photovoltaic module, a liquid cooling plate and a fire water pool, wherein:

[0006] The photovoltaic assembly includes a photovoltaic panel and a photovoltaic backsheet, wherein the photovoltaic panel is attached to the front of the photovoltaic backsheet;

[0007] The liquid cooling plate includes a heat conducting plate and a liquid flow channel. The heat conducting plate is attached to the back of the photovoltaic backsheet. The liquid flow channel has an S-shaped curve structure and is evenly distributed inside the heat conducting plate. The diameter of the liquid flow channel is ≤6mm, and the two ends of the liquid flow channel are respectively a liquid inlet and a liquid outlet.

[0008] The liquid inlet is connected to the bottom of the fire water tank through a liquid inlet pipe, and a water pump is installed on the liquid inlet pipe. The liquid outlet is connected to the water surface of the fire water tank through a liquid outlet pipe.

[0009] Preferably, thermal grease is coated between the photovoltaic backsheet and the heat conducting plate.

[0010] Preferably, a pair of wireless contact temperature sensing chips are provided between the photovoltaic backsheet and the heat conducting plate, and the sensing surfaces of the wireless contact temperature sensing chips are attached to the back side of the photovoltaic backsheet.

[0011] Preferably, the photovoltaic panel is electrically connected to an inverter, and the water pump is electrically connected to an output end of the inverter.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. This utility model utilizes a liquid cooling device to maintain the photovoltaic modules at their optimal operating temperature without affecting their ability to receive sunlight, thereby reducing power generation efficiency and improving overall module efficiency. This device also prevents overheating, which can lead to aging and fatigue. Furthermore, if localized overheating occurs on a photovoltaic panel, it can easily lead to hot spot failures, which can cause localized battery burnout, melting solder joints, and cracked cover glass. The liquid cooling device can mitigate the risk of these issues. This device also protects the photovoltaic backsheet and extends its service life.

[0014] 2. This utility model effectively utilizes a contact-type temperature sensor to detect the temperature of the photovoltaic module. If the module temperature is too high, the chip transmits a start signal, which simultaneously activates a water pump to direct water from the fire water tank to the liquid cooling plate behind the photovoltaic module. Once the module temperature drops, the chip transmits a shut-off signal to the water pump, reducing the pump's electricity and water consumption, conserving resources while also cooling the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the front side of the utility model.

[0016] Figure 2 It is a schematic diagram of the structure of the front explosion of the utility model.

[0017] Figure 3 This is a schematic structural diagram of the liquid cooling plate in the present invention.

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the reverse side of the utility model.

[0019] Figure 5 It is a schematic diagram of the structure of the reverse explosion of the utility model.

[0020] in:

[0021] 10-photovoltaic module; 11-photovoltaic panel; 12-photovoltaic backsheet;

[0022] 20-liquid cooling plate; 21-heat conducting plate; 22-liquid flow channel; 22a-liquid inlet; 22b-liquid outlet;

[0023] 30-thermal conductive silicone;

[0024] 40-Wireless contact temperature sensing chip. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] like Figures 1 to 4 As shown, a liquid cooling device for photovoltaic modules includes a photovoltaic module 10, a liquid cooling plate 20 and a fire water tank, wherein:

[0027] The photovoltaic assembly 10 includes a photovoltaic panel 11 and a photovoltaic backsheet 12 , wherein the photovoltaic panel 11 is attached to the front surface of the photovoltaic backsheet 12 ;

[0028] The liquid cooling plate 20 includes a heat conducting plate 21 and a liquid flow channel 22. The heat conducting plate 21 is attached to the back of the photovoltaic backsheet 12. The liquid flow channel 22 has an S-shaped curve structure and is evenly distributed inside the heat conducting plate 21. The diameter of the liquid flow channel 22 is ≤6mm, and the two ends of the liquid flow channel are respectively a liquid inlet 22a and a liquid outlet 22b.

[0029] The liquid inlet 22a is connected to the bottom of the fire water tank through a liquid inlet pipe, and a water pump is installed on the liquid inlet pipe. The liquid outlet 22b is connected to the water surface of the fire water tank through a liquid outlet pipe.

[0030] In this embodiment, thermal grease 30 is applied between the photovoltaic backsheet 12 and the heat conducting plate 21. The thermal grease can enhance the heat conduction effect between the photovoltaic backsheet 12 and the heat conducting plate 21, thereby improving the heat dissipation capability of the liquid cooling plate 20 to the photovoltaic module 10.

[0031] In this embodiment, a pair of wireless contact temperature sensing chips 40 are provided between the photovoltaic backsheet 12 and the heat conducting plate 21, and the sensing surfaces of the wireless contact temperature sensing chips 40 are attached to the back of the photovoltaic backsheet 12. The wireless contact temperature sensing chips 40 can collect temperature information of the photovoltaic module 10 in real time.

[0032] In this embodiment, the photovoltaic panel 11 is electrically connected to an inverter, and the water pump is electrically connected to an output terminal of the inverter. The electricity generated by the photovoltaic panel 11 directly provides power to the water pump.

[0033] In this embodiment, an automatic control system is also included, and the automatic control system is electrically connected between the water pump and the wireless contact temperature sensing chip 40. Under the control of the automatic control system, the water pump can be automatically controlled to start or stop according to temperature information, realizing intelligent temperature monitoring and management.

[0034] The working principle of this liquid cooling device for photovoltaic modules:

[0035] When light acts on the photovoltaic module 10, the photovoltaic panel 11 produces a photoelectric effect and generates electricity, while the temperature of the photovoltaic module 10 rises. When the wireless contact temperature sensing chip 40 detects that the temperature of the photovoltaic backboard 12 reaches the preset starting temperature, the automatic control system will start the water pump and introduce the cold water at the bottom of the fire water pool into the liquid cooling plate 20 for circulation cooling. The liquid enters through the liquid inlet 22a of the liquid cooling plate 20, flows through the entire liquid flow channel 22, and finally flows out through the liquid outlet 22b, realizing the circulation of the liquid. When the liquid flows through the liquid cooling plate 20, it exchanges heat with the photovoltaic backboard 12, absorbs the heat on the photovoltaic backboard 12 and takes it away. Through continuous liquid circulation, the liquid cooling plate 20 can effectively reduce the temperature of the photovoltaic backboard 12 and achieve efficient heat dissipation. During the circulation process, the liquid is constantly exchanged with the fire water pool to maintain the cooling effect.

[0036] When the light intensity decreases or the power generation efficiency of the photovoltaic module 10 decreases, the temperature of the photovoltaic module 10 will also decrease accordingly. When the wireless contact temperature sensor chip 40 detects that the temperature of the photovoltaic backsheet 12 has dropped to the preset shutdown temperature, the automatic control system will shut off the power supply to the water pump, stopping the circulation of the liquid.

[0037] In summary, the above-described operating mode demonstrates that the liquid cooling system of the present application can achieve automatic start and stop, self-sufficient power consumption, and protect the photovoltaic modules 10, improve the power generation efficiency of the photovoltaic modules 10, and extend the service life of the photovoltaic modules 10. This method can be used to appropriately design the number of wireless contact temperature sensing chips 40 to be used based on the project construction capacity, and this method can be extended to other plant water sources, utilizing a simple water cycle to achieve cooling, saving resources, and achieving efficient operation.

[0038] Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A liquid cooling device for photovoltaic modules, characterized by: It comprises a photovoltaic module (10), a liquid cooling plate (20) and a fire water pool, wherein: The photovoltaic assembly (10) comprises a photovoltaic panel (11) and a photovoltaic backsheet (12), wherein the photovoltaic panel (11) is attached to the front surface of the photovoltaic backsheet (12); The liquid cooling plate (20) comprises a heat conducting plate (21) and a liquid flow channel (22); the heat conducting plate (21) is attached to the back of the photovoltaic back plate (12); the liquid flow channel (22) is an S-shaped curve structure and is evenly distributed in the heat conducting plate (21); the diameter of the liquid flow channel (22) is ≤6 mm, and the two ends thereof are respectively a liquid inlet (22a) and a liquid outlet (22b); The liquid inlet (22a) is connected to the bottom of the fire water tank through a liquid inlet pipe, and a water pump is installed on the liquid inlet pipe. The liquid outlet (22b) is connected to the water surface of the fire water tank through a liquid outlet pipe.

2. The liquid cooling device for photovoltaic modules according to claim 1, characterized in that: Thermal conductive silicone grease (30) is coated between the photovoltaic back plate (12) and the heat conducting plate (21).

3. The liquid cooling device for photovoltaic modules according to claim 1, characterized in that: A pair of wireless contact temperature sensing chips (40) are provided between the photovoltaic backboard (12) and the heat conducting plate (21), and the sensing surfaces of the wireless contact temperature sensing chips (40) are attached to the back surface of the photovoltaic backboard (12).

4. The liquid cooling device for photovoltaic modules according to claim 1, characterized in that: The photovoltaic panel (11) is electrically connected to an inverter, and the water pump is electrically connected to an output end of the inverter.

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