Heating device

Abstract

The utility model relates to solar cell technical field, more particularly, relate to a kind of heating device;Heating device includes heating furnace, hot air mechanism and flower basket, heating furnace has heating cavity, and with the feed inlet and discharge port of heating cavity communication;Hot air mechanism is provided with first air outlet, first air outlet is set at feed inlet or discharge port, for forming hot air wind wall, prevent the heat loss in heating cavity;Flower basket includes bottom plate and two side plates, two side plates are connected with bottom plate, and bottom plate and two side plates jointly enclose and place cavity, and place cavity is used to place cell piece.The heating furnace device can reduce the heat leakage in heating cavity, and then ensure the temperature stability in heating cavity;The flower basket can utilize the side plate of both sides of placement cavity, improve the temperature uniformity in placement cavity, to improve the good ohmic contact between the grid line of cell piece and transparent conductive film.

Description

Technical Field

[0001] This utility model relates to the field of solar cell technology, and more specifically, to a heating device. Background Technology

[0002] The fabrication process of heterojunction solar cells (HJTs) can be roughly divided into: texturing, PECVD, PVD, and screen printing. Among them, screen printing, as the last step in the fabrication of heterojunction solar cells, is mainly used to create positive and negative electrodes on the surface of the cell so that the current can be conducted through the electrodes.

[0003] The basic requirements for electrode fabrication include ensuring that the electrode grid lines can form good contact with the transparent conductive film (e.g., ITO film) to achieve good conductivity and high current collection efficiency. Achieving good ohmic contact requires a certain degree of temperature stability in the heating furnace. Curing the grid lines at different temperatures will have different effects on the short-circuit current, open-circuit voltage, and fill factor of the solar cell.

[0004] However, the heating furnaces provided by the related technologies have difficulty maintaining a stable heating temperature, which makes it difficult to ensure a good ohmic contact between the grid lines of the solar cell and the transparent conductive film. Utility Model Content

[0005] The purpose of this invention is to provide a heating device that can reduce heat loss from the heating chamber, thereby ensuring temperature stability within the heating chamber and improving the formation of good ohmic contact between the grid lines and the transparent conductive film of the battery cell.

[0006] The embodiments of this utility model can be implemented as follows: This utility model provides a heating device, including: A heating furnace, comprising a heating chamber, and a feed inlet and a discharge outlet communicating with the heating chamber; and, The hot air mechanism is equipped with a first air outlet, which is located at the feed inlet or the discharge outlet to form a hot air wall and prevent heat loss from the heating chamber.

[0007] In an optional embodiment, the hot air mechanism further includes a second air outlet. The first air outlet is located at the feed inlet, and the second air outlet is located at the discharge outlet. The second air outlet is used to form a hot air wall to prevent heat loss from the heating chamber.

[0008] In an optional embodiment, the heating device further includes a conveying mechanism for feeding the flower basket from the inlet into the heating chamber and outputting the flower basket from the outlet into the heating chamber.

[0009] In an optional embodiment, the conveying mechanism has a conveying surface for supporting the flower basket; a first air outlet is configured to blow air toward the conveying surface.

[0010] In an optional embodiment, the hot air mechanism further includes an air outlet duct and a heating element, the heating element being disposed outside the air outlet duct, and the air outlet duct being provided with a first air outlet.

[0011] In an optional embodiment, the flower basket includes a base plate and two side plates, both of which are connected to the base plate, and the base plate and the two side plates together form a placement cavity for placing the battery cells.

[0012] In an optional embodiment, the flower basket also includes a top plate, and the ends of the two side plates away from the bottom plate are connected to the top plate, with vents provided on the top plate.

[0013] In an optional embodiment, the flower basket includes retaining teeth that are connected to the side plate and located within the placement cavity, the retaining teeth being used to support the battery cells.

[0014] In an optional embodiment, the flower basket further includes a reinforcing plate connected to at least one of the bottom plate and the top plate and located between the two side plates for spaced placement of the cavity into two chambers, the chambers being used to prevent the battery cells from being placed.

[0015] The beneficial effects of the heating device in this embodiment of the present invention include: the heating device provided in this embodiment of the present invention includes a heating furnace and a hot air mechanism. The heating furnace has a heating chamber, and an inlet and an outlet communicating with the heating chamber. The hot air mechanism is provided with a first air outlet, which is located at the inlet or the outlet to form a hot air wall to prevent heat loss from the heating chamber. In this way, the hot air wall formed at the inlet or the outlet can reduce heat leakage from the heating chamber, thereby ensuring the temperature stability within the heating chamber and improving the formation of good ohmic contact between the grid lines and the transparent conductive film of the battery cell. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the heating device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the flower basket in an embodiment of this utility model.

[0018] Icons: 010-Heating device; 100-Heating furnace; 111-Feed inlet; 112-Discharge outlet; 120-Conveying mechanism; 121-Conveying surface; 210-First air outlet; 220-Second air outlet; 300-Flower basket; 310-Bottom plate; 320-Side plate; 330-Top plate; 331-Exhaust port; 340-Placement cavity; 3401-Cavity; 341-First opening; 342-Second opening; 351-Reinforcing plate; 352-Reinforcing rib; 360-Clamping teeth; 400-Battery cell. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during 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, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0025] Please refer to Figure 1This embodiment provides a heating device 010, which can be used for heat treatment of battery cells 400. The heating device 010 includes a heating furnace 100 and a hot air mechanism. The heating furnace 100 has a heating chamber, and an inlet 111 and an outlet 112 communicating with the heating chamber. The inlet 111 allows the battery cells 400 to enter the heating chamber for heat treatment, and the outlet 112 allows the heat-treated battery cells 400 to leave the heating chamber. The hot air mechanism is provided with a first air outlet 210, which is located at the inlet 111 to form a hot air wall, preventing heat loss from the heating chamber through the inlet 111. In this way, the hot air wall formed at the inlet 111 reduces heat loss from the heating chamber, thereby ensuring temperature stability within the heating chamber and improving the ohmic contact between the grid lines and the transparent conductive film of the battery cells 400.

[0026] It should be understood that in other embodiments, the first air outlet 210 may be located at the discharge port 112 to form a hot air wall at the discharge port 112, preventing heat loss from the heating chamber. In this way, the hot air wall formed at the discharge port 112 can reduce heat leakage from the heating chamber, thereby ensuring temperature stability within the heating chamber and improving the formation of good ohmic contact between the grid lines and the transparent conductive film of the battery cell 400.

[0027] Optionally, the hot air mechanism further includes a second air outlet 220, which is located at the discharge port 112. The second air outlet 220 forms a hot air wall to prevent heat loss from the heating chamber through the discharge port 112. Further providing a second air outlet 220 at the discharge port 112 to form a hot air wall, in conjunction with the hot air wall formed at the feed port 111, can more effectively improve the problem of heat loss within the heating chamber, thereby improving the stability of the solar cell 400 during heat treatment within the heating chamber and enhancing the formation of good ohmic contact between the grid lines and the transparent conductive film of the solar cell 400.

[0028] The heating device 010 in this embodiment also includes a conveying mechanism 120 and a basket 300. The conveying mechanism 120 is used to feed the basket 300, which contains the battery cells 400, into the heating chamber from the feed port 111 and to output the basket 300 from the discharge port 112. The conveying mechanism 120 enables automated operation, thereby improving the efficiency of battery cell 400 production and reducing manual labor.

[0029] Furthermore, the conveying mechanism 120 has a conveying surface 121 for supporting the flower basket 300, and both the first air outlet 210 and the second air outlet 220 are configured to blow air toward the conveying surface 121. In this way, the hot air walls formed at the inlet 111 and the outlet 112 can be reliably used to reduce heat loss in the heating chamber, thereby ensuring the stability of the temperature in the heating chamber.

[0030] Optionally, the air outlets 210 and 220 are both perpendicular to the conveying surface 121; this reduces the gap between the hot air wall and the corresponding feed inlet 111 or discharge outlet 112, thereby more reliably reducing heat loss in the hot chamber and ensuring the stability of the temperature in the heating chamber.

[0031] Of course, in other embodiments, the air outlet 210 can also be configured to be inclined toward the interior of the heating chamber relative to the conveying surface 121, so that at least part of the air blown out from the first air outlet 210 is blown into the heating chamber from the feed inlet 111 to maintain the temperature stability inside the heating chamber; or, the air outlet 220 can also be configured to be inclined toward the interior of the heating chamber relative to the conveying surface 121, so that at least part of the air blown out from the second air outlet 220 is blown into the heating chamber from the discharge outlet 112.

[0032] Optionally, the conveying mechanism 120 includes, but is not limited to, a conveyor belt assembly.

[0033] In this embodiment, the hot air mechanism further includes an air outlet duct (not shown) and a heating element (not shown). The heating element is disposed outside the air outlet duct, and the air outlet duct is provided with a first air outlet 210. By disposing of the heating element outside the air outlet duct, the fluid inside the air outlet duct can be reliably heated using the heating element, ensuring that the gas blown out from the first air outlet 210 has a sufficiently high temperature to improve the problem of temperature loss in the heating chamber.

[0034] Furthermore, the hot air mechanism includes two air outlet ducts, each of which is equipped with a heating element on its exterior. One air outlet duct is located near the feed inlet 111 and is provided with a first air outlet 210, while the other air outlet duct is located near the discharge outlet 112 and is provided with a second air outlet 220.

[0035] Alternatively, the heating element may be a heating rod or the like that wrapped around the outside of the air outlet duct, and no specific limitation is made here.

[0036] Optionally, both air outlet ducts are connected to the heating furnace 100. The connection method includes, but is not limited to, connecting them to the outer wall of the heating furnace 100 with fasteners such as bolts, or connecting them to the outer wall of the heating furnace 100 through brackets.

[0037] Optionally, the air outlet duct can be connected to a CDA (Compressed Dry Air) exhaust device. That is, one end of the air outlet duct away from the first air outlet 210 and the other end of the air outlet duct away from the second air outlet 220 are both connected to the CDA exhaust device. This allows the gas entering the air outlet duct and being heated by the heating element to be reused, preventing the loss of hot air in the heating chamber.

[0038] Please refer to Figure 2 The flower basket 300 of this embodiment includes a base plate 310 and two side plates 320. Both side plates 320 are connected to the base plate 310, and the base plate 310 and the two side plates 320 together form a placement cavity 340, which is used to place the battery cell 400. The flower basket 300 can improve the temperature uniformity within the placement cavity 340 by utilizing the side plates 320 on both sides of the placement cavity 340, that is, it can make the temperature at various locations within the placement cavity 340 as uniform as possible, thereby improving the formation of good ohmic contact between the grid lines and the transparent conductive film of the battery cell 400.

[0039] Furthermore, the flower basket 300 also includes a top plate 330, and the ends of the two side plates 320 away from the bottom plate 310 are connected to the top plate 330. The top plate 330 is provided with an exhaust port 331. By providing an exhaust port 331 on the top plate 330, the exhaust gas generated by the heat-treated battery cell 400 can be discharged in a timely manner.

[0040] Optionally, the flower basket 300 also includes a reinforcing plate 351, with its two ends connected to the bottom plate 310 and the top plate 330, respectively. The reinforcing plate 351 divides the placement cavity 340 into two chambers 3401, both of which are used to place the solar cells 400. In this way, the structural strength of the flower basket 300 can be improved, and more solar cells 400 can be reliably placed in the two chambers 3401. At the same time, the reinforcing plate 351 can also cooperate with the side plates 320 on both sides to ensure the stability and consistency of the temperature at various positions from bottom to top in the chambers 3401, thereby improving the formation of good ohmic contact between the grid lines and the transparent conductive film of the solar cells 400.

[0041] It should be understood that in other embodiments, the reinforcing plate 351 may be connected only to the bottom plate 310 or the top plate 330, and no specific limitation is made here.

[0042] Optionally, the two side plates 320 have a first opening 341 and a second opening 342 distributed opposite to each other. Both the first opening 341 and the second opening 342 communicate with the placement cavity 340. Specifically, the first opening 341 and the second opening 342 communicate with any one of the chambers 3401. The flower basket 300 also includes a reinforcing rib 352, the two ends of which are connected to the bottom plate 310 and the top plate 330, and the reinforcing rib 352 is located at the second opening 342. The battery cell 400 can be placed into any one of the chambers 3401 from the first opening 341, and the setting of the reinforcing rib 352 can further improve the structural strength of the flower basket 300.

[0043] The number of reinforcing ribs 352 can be selected as needed, such as one, two, three, etc. In embodiments where the number of reinforcing ribs 352 is greater than or equal to two, multiple reinforcing ribs 352 are distributed sequentially at intervals.

[0044] Optionally, the flower basket 300 includes a retaining tooth 360, which is connected to the side plate 320 and located within the placement cavity 340, i.e., the retaining tooth 360 is embedded and does not protrude from the placement cavity 340; the retaining tooth 360 is used to support the battery cell 400. This arrangement, with the retaining tooth 360 located between the two side plates 320, ensures that the battery cell 400 inserted into the retaining tooth 360 is completely within the placement cavity 340, thus mitigating the temperature imbalance problem that occurs when the battery cell 400 protrudes from the placement cavity 340.

[0045] Furthermore, both side plates 320 are connected to retaining teeth 360, and the retaining teeth 360 connected to each side plate 320 are opposite to the reinforcing plate 351 and are spaced apart, that is, retaining teeth 360 are provided in both chambers 3401, so that both chambers 3401 can reliably prevent the battery cell 400.

[0046] The connection methods of the base plate 310 and the side plate 320, the connection methods of the side plate 320 and the top plate 330, the connection methods of the reinforcing plate 351 with the base plate 310 and the top plate 330, the connection methods of the reinforcing rib 352 with the base plate 310 and the top plate 330, and the connection methods of the locking tooth 360 with the side plate 320 are all including but not limited to welding and integral molding.

[0047] Optionally, the base plate 310, side plate 320, reinforcing plate 351, top plate 330, reinforcing rib 352 and retaining tooth 360 can all be made of high-temperature resistant insulation materials, such as ceramics, graphite, carbon fiber, etc., without specific limitations.

[0048] It should be noted that when the flower basket 300 enters the heating chamber from the feed inlet 111, any one of the three openings 341, 342 and side plate 320 can enter the heating chamber from the feed inlet 111 first.

[0049] The process of heat treatment of the battery cell 400 by the heating device 010 in this embodiment includes: placing the battery cell 400 in a basket 300, and using a conveying mechanism 120 to transport the basket 300 containing the battery cell 400 so that the basket 300 enters the heating chamber of the heating furnace 100 from the feed port 111. After the battery cell 400 has completed heat treatment, the conveying mechanism 120 outputs the basket 300 and the battery cell 400 therein from the discharge port 112.

[0050] In summary, the heating furnace 100 device of this invention can reduce heat loss from the heating chamber, thereby ensuring temperature stability within the heating chamber and improving the ohmic contact between the grid lines of the battery cell 400 and the transparent conductive film. The flower basket 300 of this invention utilizes the side plates 320 on both sides of the placement cavity 340 to improve temperature uniformity within the placement cavity 340, ensuring that the temperature at various locations within the placement cavity 340 is as consistent as possible, thus improving the ohmic contact between the grid lines of the battery cell 400 and the transparent conductive film.

[0051] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A heating device, characterized in that, include: A heating furnace (100) having a heating chamber, and a feed inlet (111) and a discharge outlet (112) communicating with the heating chamber; and, The hot air mechanism is provided with a first air outlet (210), which is located at the feed inlet (111) or the discharge outlet (112) to form a hot air wall to prevent heat loss from the heating chamber.

2. The heating device according to claim 1, characterized in that, The hot air mechanism further includes a second air outlet (220). The first air outlet (210) is located at the feed inlet (111), and the second air outlet (220) is located at the discharge outlet (112). The second air outlet (220) is used to form a hot air wall to prevent heat loss from the heating chamber.

3. The heating device according to claim 1, characterized in that, The heating device also includes a conveying mechanism (120) and a flower basket. The conveying mechanism (120) is used to feed the flower basket from the feed port (111) into the heating chamber and to output the flower basket from the discharge port (112) into the heating chamber.

4. The heating device according to claim 3, characterized in that, The conveying mechanism (120) has a conveying surface (121) for supporting the flower basket; the first air outlet (210) is configured to blow air toward the conveying surface (121).

5. The heating device according to any one of claims 1-4, characterized in that, The hot air mechanism further includes an air outlet duct and a heating element. The heating element is disposed outside the air outlet duct, and the air outlet duct is provided with the first air outlet (210).

6. The heating device according to claim 3, characterized in that, The flower basket includes a base plate (310) and two side plates (320), both of which are connected to the base plate (310). The base plate (310) and the two side plates (320) together form a placement cavity (340), which is used to place the battery cells (400).

7. The heating device according to claim 6, characterized in that, The flower basket also includes a top plate (330), and the ends of the two side plates (320) away from the bottom plate (310) are connected to the top plate (330). The top plate (330) is provided with an exhaust port (331).

8. The heating device according to claim 6, characterized in that, The flower basket includes a locking tooth (360), which is connected to the side plate (320) and located in the placement cavity (340). The locking tooth (360) is used to support the battery cell (400).

9. The heating device according to claim 7, characterized in that, The flower basket also includes a reinforcing plate (351) connected to at least one of the bottom plate (310) and the top plate (330) and located between the two side plates (320) for dividing the placement cavity (340) into two chambers (3401), the chambers (3401) for preventing the battery cells (400) from entering.

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