Efficient heat dissipation type double-glass PVT assembly

Abstract

The utility model discloses an efficient heat dissipation type double-glass PVT assembly, which belongs to the field of photovoltaic power generation, and comprises a plurality of battery units arranged in an array, each battery unit comprises an outer frame and a battery pack string fixed in the outer frame, the battery pack string is electrically connected with a junction box through a bus bar, and the junction box is connected with the battery pack string. The battery pack string is provided with one or a combination of a top-end heat dissipation unit and a bottom-end heat dissipation unit, and the top-end heat dissipation unit and the bottom-end heat dissipation unit are both of forced liquid cooling structures. By adopting the high-efficiency heat dissipation type double-glass PVT assembly, high-efficiency heat dissipation can be carried out while photovoltaic power generation of the double-glass PVT assembly is not influenced.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation technology, and in particular to a high-efficiency heat dissipation type double-glass PVT module. Background Technology

[0002] The power generation efficiency of crystalline silicon solar cells depends on their operating temperature; for every 1°C increase in temperature, the output power decreases by 0.4% to 0.5%. Furthermore, since over 80% of the energy reaching the cell surface is converted into heat, the operating temperature of solar cells is typically above 50°C, and can even reach 80°C when heat dissipation is poor, thus severely impacting the cell's efficiency.

[0003] To address the aforementioned heat dissipation issues, the market currently uses blown refrigerant evaporators as heat collectors, also known as PVT collectors, to cool the solar cells and use the collected heat for energy supply.

[0004] However, there are significant differences between single-sided and double-sided photovoltaic modules. Single-sided photovoltaic modules can only receive sunlight from the front, so metal heat collectors or heat collectors of other materials can be installed. Double-sided photovoltaic modules can generate electricity from both sides, so metal heat collectors or heat collectors of other materials cannot be installed. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency heat dissipation double-glass PVT module to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides a high-efficiency heat dissipation double-glass PVT module, comprising multiple battery cells arranged in an array. Each battery cell includes an outer frame and a battery string fixed inside the outer frame. The battery string is electrically connected to a junction box via a busbar. The battery string is provided with one or a combination of a top heat dissipation unit and a bottom heat dissipation unit. Both the top heat dissipation unit and the bottom heat dissipation unit are forced liquid cooling structures.

[0007] Preferably, the top heat dissipation unit includes a top outer tempered glass, at least one top tempered glass support frame, and a top inner tempered glass arranged sequentially in the direction of the battery string. The top outer tempered glass and the top tempered glass support frame, as well as the top tempered glass support frame and the top inner tempered glass, are sealed with EVA adhesive. The top outer tempered glass, the top tempered glass support frame, and the top inner tempered glass form a top sealed cooling cavity. The top sealed cooling cavities of two adjacent battery units are connected through a top connecting hole opened on the side of the top tempered glass support frame. The top sealed cooling cavity of the battery unit located at the edge is connected to the refrigerator.

[0008] Preferably, the bottom heat dissipation unit includes bottom outer tempered glass, at least one bottom tempered glass support frame, and bottom inner tempered glass arranged sequentially in the direction of the battery string. The bottom outer tempered glass and the bottom tempered glass support frame, as well as the bottom tempered glass support frame and the bottom inner tempered glass, are sealed with EVA adhesive. The bottom outer tempered glass, the bottom tempered glass support frame, and the bottom inner tempered glass form a bottom sealed cooling cavity. The bottom sealed cooling cavities of two adjacent battery units are connected through bottom connecting holes opened on the bottom outer tempered glass. The bottom sealed cooling cavity of the battery unit located at the edge is connected to the refrigerator.

[0009] At least one support plate is also provided between the outer tempered glass at the bottom and the inner tempered glass at the bottom.

[0010] Preferably, when a top heat dissipation unit is provided at the top of the battery string, the bottom end of the tempered glass on the inner side of the top is bonded to the top of the battery string with EVA adhesive, and the bottom end of the battery string is bonded to the bottom sealing tempered glass with EVA adhesive. At this time, the junction box is fixed to the bottom end of the bottom sealing tempered glass.

[0011] When a bottom heat dissipation unit is installed at the bottom of the battery string, the top of the tempered glass on the inner side of the bottom is bonded to the bottom of the battery string with EVA adhesive, and the top of the battery string is bonded to the top sealing tempered glass with EVA adhesive. At this time, the junction box passes through the first clearance hole opened on the outer side of the bottom tempered glass and the second clearance hole opened on the support plate in sequence and is then fixed to the bottom of the inner side of the bottom tempered glass.

[0012] When a top heat dissipation unit is installed at the top of the battery string and a bottom heat dissipation unit is installed at the bottom, the top of the battery string is bonded to the inner tempered glass of the top with EVA adhesive, and the bottom of the battery string is bonded to the top of the inner tempered glass of the bottom with EVA adhesive. At this time, the junction box passes through the first clearance hole opened on the outer tempered glass of the bottom and the second clearance hole opened on the support plate in sequence and is then fixed to the bottom of the inner tempered glass of the bottom.

[0013] Preferably, a connecting nozzle is inserted into both the top connecting hole and the bottom connecting hole. One end of the connecting nozzle, which extends into the top connecting hole or the bottom connecting hole, is connected to a water nozzle pressure plate, and the other end of the connecting nozzle is configured with a threaded structure.

[0014] The connecting nozzles between the top or bottom sealed cooling cavities of two adjacent battery cells are threaded together.

[0015] Preferably, the size of the outer tempered glass at the top is the same as the size of the tempered glass support frame at the top, and the size of the tempered glass support frame at the top is smaller than the size of the tempered glass at the top.

[0016] The dimensions of the outer tempered glass at the bottom are the same as the dimensions of the tempered glass support frame at the bottom, while the dimensions of the tempered glass support frame at the bottom are smaller than the dimensions of the inner tempered glass at the bottom.

[0017] Preferably, both the top-sealed cooling cavity and the bottom-sealed cooling cavity are filled with coolant, which is water, alcohol or antifreeze.

[0018] Therefore, the beneficial effects of this utility model using the above-mentioned high-efficiency heat dissipation double-glass PVT module are as follows:

[0019] 1. By setting heat dissipation units at the top and / or bottom of the battery string and adopting a forced liquid cooling structure, the temperature of the battery string can be effectively reduced, power generation efficiency can be improved and service life can be extended.

[0020] 2. The top and bottom heat dissipation units circulate coolant through sealed cooling chambers to ensure uniform temperature distribution throughout the entire component and prevent localized overheating.

[0021] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0022] Figure 1 This is an exploded view of Embodiment 1 of this utility model;

[0023] Figure 2 This is a longitudinal sectional view of Embodiment 1 of the present invention;

[0024] Figure 3 This is a diagram showing the arrangement of the battery string in Embodiment 1 of this utility model;

[0025] Figure 4 for Figure 3 Enlarged view of point A;

[0026] Figure 5 This is an exploded view of Embodiment 2 of this utility model;

[0027] Figure 6 This is a longitudinal sectional view of Embodiment 2 of the present invention;

[0028] Figure 7 This is a diagram showing the arrangement of the battery string in Embodiment 2 of this utility model;

[0029] Figure 8 for Figure 7 Enlarged view of point B;

[0030] Figure 9 This is an exploded view of Embodiment 3 of this utility model;

[0031] Figure 10 This is a longitudinal sectional view of Embodiment 3 of the present invention;

[0032] Figure 11 This is a diagram showing the arrangement of the battery string in Embodiment 3 of this utility model;

[0033] Figure 12 for Figure 11 Enlarged view of point C.

[0034] Figure Labels

[0035] 1. Battery string; 2. EVA adhesive; 3. Top inner tempered glass; 4. Top tempered glass support frame; 5. Top outer tempered glass; 6. Bottom sealing tempered glass; 7. Junction box; 8. Outer frame; 9. Coolant; 10. Connector; 11. Water nozzle clamp; 12. Busbar; 13. Bottom tempered glass support frame; 14. Bottom outer tempered glass; 15. Bottom connecting hole; 16. First clearance hole; 17. Support plate; 18. Second clearance hole; 19. Bottom inner tempered glass; 20. Top sealing tempered glass. Detailed Implementation

[0036] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0038] A high-efficiency heat dissipation double-glass PVT module includes multiple battery cells arranged in an array. Each battery cell includes an outer frame and a battery string fixed inside the outer frame. The battery string is electrically connected to a junction box via a busbar. The battery string is provided with one or a combination of a top heat dissipation unit and a bottom heat dissipation unit. Both the top heat dissipation unit and the bottom heat dissipation unit are forced liquid cooling structures.

[0039] Specifically, the top heat dissipation unit includes an outer tempered glass panel facing the battery string, at least one layer of top tempered glass support frame, and an inner tempered glass panel arranged sequentially. The outer tempered glass panel and the top tempered glass support frame, as well as the top tempered glass support frame and the inner tempered glass panel, are sealed with EVA adhesive. The outer tempered glass panel, the top tempered glass support frame, and the inner tempered glass panel together form a top-sealed cooling chamber. The top-sealed cooling chambers of two adjacent battery units are connected via top-connecting holes on the side of the top tempered glass support frame. The top-sealed cooling chamber of the edge battery unit is connected to the refrigerator. Top-connecting holes are provided at both ends of the long sides of the top tempered glass support frame. The coolant output from the refrigerator first enters the top-sealed cooling chamber through the top-connecting hole on the same side of the top tempered glass support frame of the first battery unit, carrying away heat from the battery unit surface. It then flows out through the top-connecting hole on the other side, passes through the top-sealed cooling chambers of adjacent battery units, and finally returns to the refrigerator from the top-sealed cooling chamber at the end.

[0040] The bottom heat dissipation unit includes a bottom outer tempered glass, at least one bottom tempered glass support frame, and a bottom inner tempered glass arranged sequentially in the direction of the battery string. The bottom outer tempered glass and the bottom tempered glass support frame, as well as the bottom tempered glass support frame and the bottom inner tempered glass, are sealed with EVA adhesive. The bottom outer tempered glass, the bottom tempered glass support frame, and the bottom inner tempered glass together form a bottom sealed cooling cavity. The bottom sealed cooling cavities of two adjacent battery cells are connected through bottom connecting holes opened on the bottom outer tempered glass. The bottom sealed cooling cavity of the battery cell located at the edge is connected to the refrigerator. At least one support plate is also provided between the bottom outer tempered glass and the bottom inner tempered glass. The four corners of the tempered glass at the bottom outer edge are provided with bottom connection holes. At this time, the coolant output by the refrigerator first enters the bottom sealed cooling cavity through the bottom connection hole of the battery unit at the beginning, which is located on the same side of the tempered glass at the bottom outer edge. After carrying away the heat on the surface of the battery unit, it flows out through the bottom connection hole on the other side, passes through the bottom sealed cooling cavities of the adjacent battery units in sequence, and then flows back into the refrigerator from the bottom sealed cooling cavity at the end.

[0041] Example 1:

[0042] like Figures 1-4 As shown, when a top heat dissipation unit is installed at the top of the battery string, the bottom of the inner tempered glass at the top is bonded to the top of the battery string with EVA adhesive, and the bottom of the battery string is bonded to the bottom sealing tempered glass with EVA adhesive. At this time, the junction box is fixed to the bottom of the bottom sealing tempered glass; at this time, only the top of the battery string is equipped with a top heat dissipation unit.

[0043] Example 2:

[0044] like Figures 5-8 As shown, when a bottom heat dissipation unit is installed at the bottom of the battery string, the top of the tempered glass on the inner side of the bottom is bonded to the bottom of the battery string with EVA adhesive, and the top of the battery string is bonded to the top sealing tempered glass with EVA adhesive. At this time, the junction box passes through the first clearance hole opened on the outer side of the bottom tempered glass and the second clearance hole opened on the support plate in sequence and is fixed to the bottom of the inner side of the bottom tempered glass; at this time, only the bottom of the battery string is equipped with a bottom heat dissipation unit.

[0045] Example 3:

[0046] like Figures 9-12 As shown, when a top heat dissipation unit is provided at the top of the battery string and a bottom heat dissipation unit is provided at the bottom, the top of the battery string is bonded to the inner tempered glass of the top with EVA adhesive, and the bottom of the battery string is bonded to the top of the inner tempered glass of the bottom with EVA adhesive. At this time, the junction box passes through the first clearance hole opened on the outer tempered glass of the bottom and the second clearance hole opened on the support plate in sequence and is then fixed to the bottom of the inner tempered glass of the bottom.

[0047] Both the top and bottom connecting holes have connecting nozzles inserted into them. The outer wall of the connecting nozzle is filled with EVA glue between it and the inner wall of the top or bottom connecting hole. One end of the connecting nozzle that extends into the top or bottom connecting hole is connected to a water nozzle pressure plate, and the other end of the connecting nozzle is set with a threaded structure. The connecting nozzles between the top or bottom sealing cooling cavities of two adjacent battery cells are threaded together, and the outermost connecting nozzle is connected to the refrigeration unit.

[0048] The size of the outer tempered glass at the top is the same as the size of the top tempered glass support frame, while the size of the top tempered glass support frame is smaller than the size of the inner tempered glass at the top. The size of the outer tempered glass at the bottom is the same as the size of the bottom tempered glass support frame, while the size of the bottom tempered glass support frame is smaller than the size of the inner tempered glass at the bottom. In this embodiment, the top tempered glass support frame is recessed 10mm-60mm from the inner tempered glass at the top, and the outer tempered glass at the bottom is recessed 10mm-60mm from the inner tempered glass at the bottom.

[0049] Both the top-sealed cooling chamber and the bottom-sealed cooling chamber are filled with coolant, which can be water, alcohol, or antifreeze.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A high-efficiency heat-dissipating double-glass PVT module, comprising multiple battery cells arranged in an array, each battery cell including an outer frame and a battery string fixed inside the outer frame, the battery string being electrically connected to a junction box via a busbar, characterized in that: The battery string is equipped with one or a combination of a top heat dissipation unit and a bottom heat dissipation unit, both of which are forced liquid cooling structures.

2. The high-efficiency heat dissipation double-glass PVT module according to claim 1, characterized in that: The top heat dissipation unit includes a top outer tempered glass, at least one top tempered glass support frame, and a top inner tempered glass arranged sequentially in the direction of the battery string. The top outer tempered glass and the top tempered glass support frame, as well as the top tempered glass support frame and the top inner tempered glass, are sealed with EVA adhesive. The top outer tempered glass, the top tempered glass support frame, and the top inner tempered glass form a top sealed cooling cavity. The top sealed cooling cavities of two adjacent battery cells are connected through a top connecting hole opened on the side of the top tempered glass support frame. The top sealed cooling cavity of the battery cell located at the edge is connected to the refrigerator.

3. The high-efficiency heat dissipation double-glass PVT module according to claim 1, characterized in that: The bottom heat dissipation unit includes a bottom outer tempered glass, at least one bottom tempered glass support frame, and a bottom inner tempered glass arranged sequentially in the direction of the battery string. The bottom outer tempered glass and the bottom tempered glass support frame, as well as the bottom tempered glass support frame and the bottom inner tempered glass, are sealed with EVA glue. The bottom outer tempered glass, the bottom tempered glass support frame, and the bottom inner tempered glass form a bottom sealed cooling cavity. The bottom sealed cooling cavities of two adjacent battery cells are connected through bottom connecting holes opened on the bottom outer tempered glass. The bottom sealed cooling cavity of the battery cell located at the edge is connected to the refrigerator. At least one support plate is also provided between the outer tempered glass at the bottom and the inner tempered glass at the bottom.

4. The high-efficiency heat dissipation double-glass PVT module according to claim 3, characterized in that: When a top heat dissipation unit is installed at the top of the battery string, the bottom end of the tempered glass on the inner side of the top is bonded to the top of the battery string with EVA adhesive, and the bottom end of the battery string is bonded to the bottom sealing tempered glass with EVA adhesive. At this time, the junction box is fixed to the bottom end of the bottom sealing tempered glass. When a bottom heat dissipation unit is installed at the bottom of the battery string, the top of the tempered glass on the inner side of the bottom is bonded to the bottom of the battery string with EVA adhesive, and the top of the battery string is bonded to the top sealing tempered glass with EVA adhesive. At this time, the junction box passes through the first clearance hole opened on the outer side of the bottom tempered glass and the second clearance hole opened on the support plate in sequence and is then fixed to the bottom of the inner side of the bottom tempered glass. When a top heat dissipation unit is installed at the top of the battery string and a bottom heat dissipation unit is installed at the bottom, the top of the battery string is bonded to the inner tempered glass of the top with EVA adhesive, and the bottom of the battery string is bonded to the top of the inner tempered glass of the bottom with EVA adhesive. At this time, the junction box passes through the first clearance hole opened on the outer tempered glass of the bottom and the second clearance hole opened on the support plate in sequence and is then fixed to the bottom of the inner tempered glass of the bottom.

5. The high-efficiency heat dissipation double-glass PVT module according to claim 4, characterized in that: Both the top and bottom connecting holes are fitted with connecting nozzles. One end of the connecting nozzle, which extends into the top or bottom connecting hole, is connected to a water tap pressure plate. The other end of the connecting nozzle is threaded. The connecting nozzles between the top or bottom sealed cooling cavities of two adjacent battery cells are threaded together.

6. The high-efficiency heat dissipation double-glass PVT module according to claim 4, characterized in that: The size of the outer tempered glass at the top is the same as the size of the tempered glass support frame at the top, while the size of the tempered glass support frame at the top is smaller than the size of the tempered glass at the top. The dimensions of the outer tempered glass at the bottom are the same as the dimensions of the tempered glass support frame at the bottom, while the dimensions of the tempered glass support frame at the bottom are smaller than the dimensions of the inner tempered glass at the bottom.

7. The high-efficiency heat dissipation double-glass PVT module according to claim 4, characterized in that: Both the top-sealed cooling chamber and the bottom-sealed cooling chamber are filled with coolant, which can be water, alcohol, or antifreeze.

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