Multi-layer tunnel furnace

Abstract

The utility model belongs to the technical field of solar cells, and particularly relates to a multi-layer tunnel furnace which comprises a tunnel furnace body, a plurality of layers of conveying chains and a plurality of layers of conveying chains, fixed heating furnace pipe modules are arranged on the two sides of the multi-layer conveying chain respectively, and an exhaust module is arranged at the bottom of the multi-layer conveying chain. One side of the heating furnace pipe module and one side of the exhaust module facing the multi-layer transmission chain are respectively provided with a heating uniform flow plate and an exhaust uniform flow plate, according to the multi-layer tunnel furnace, the multi-layer transmission chain is arranged in the tunnel furnace body, and each transmission chain can be used for conveying perovskite battery pieces, so that the annealing efficiency is greatly improved; meanwhile, in order to enable the perovskite battery pieces on each layer of transmission chain to be annealed uniformly, the heating furnace pipe module and the exhaust module are respectively provided with a heating flow uniformizing plate and an exhaust flow uniformizing plate, so that hot air flow in the tunnel furnace body flows uniformly, and the hot air flow is prevented from being locally concentrated to influence the annealing quality of the perovskite battery pieces.

Description

Technical Field

[0001] The utility model belongs to the technical field of annealing furnaces, and in particular relates to a multi-layer tunnel furnace. Background Art

[0002] Perovskite solar cells generally use a one-step or two-step process. The one-step process requires three steps: coating-VCD-annealing, and the two-step process requires a coating-annealing step. Both processes require annealing equipment.

[0003] When processing perovskite cells, the existing annealing equipment manually places the cells at the entrance of the annealing equipment. After the cells are processed in the tunnel furnace, they are manually sent out from the discharge port of the tunnel furnace.

[0004] However, existing tunnel furnaces are all single-layer structures with low working efficiency. Multiple tunnel furnace equipment is required during mass production, which occupies a large area and requires manual placement and removal of battery cells, increasing labor costs. In addition, the battery cell transmission speed cannot be controlled, affecting the annealing effect of the battery cells.

[0005] Therefore, it is necessary to design a multi-layer tunnel furnace to solve the problems of low working efficiency of the single-layer structure and increased equipment and labor costs during mass production. Utility Model Content

[0006] The utility model aims to provide a multi-layer tunnel furnace to solve the technical problems described in the background technology.

[0007] In order to solve the above technical problems, the utility model provides a multi-layer tunnel furnace, which includes: a tunnel furnace body, and a feed port and a discharge port arranged at both ends of the tunnel furnace body, wherein a multi-layer transmission chain is arranged in the tunnel furnace body; wherein at least one layer of exhaust uniform flow plate is arranged under each layer of the transmission chain in the multi-layer transmission chain.

[0008] In one of the embodiments, a first heating furnace module is respectively arranged on both sides of the multi-layer transmission chain, and an exhaust module is arranged at the bottom of the multi-layer transmission chain; wherein at least one layer of heating flow equalizer is arranged on the side of the first heating furnace module facing the multi-layer transmission chain.

[0009] In one embodiment, a liftable second heating furnace module is disposed above the multi-layer conveying chain.

[0010] In one embodiment, a bottom plate is arranged between the tunnel furnace body and the exhaust module; the exhaust module further comprises: an exhaust pipe connected to the bottom plate; the multi-layer transmission chain and the first heating furnace module are both arranged on the bottom plate.

[0011] In one of the embodiments, the first heating furnace module and the second heating furnace module both include a "U"-shaped mounting frame; and a plurality of electric heating rods, which are evenly inserted into the "U"-shaped mounting frame along the conveying direction of the transmission chain, and the heating parts thereof are located in the "U"-shaped mounting frame; wherein a plurality of air inlets are opened at the bottom of the "U"-shaped mounting frame, and a wind wheel group is installed; the opening of the "U"-shaped mounting frame is suitable for installing at least one layer of the heating uniform flow plate, so that a uniform flow cavity is formed in the "U"-shaped mounting frame.

[0012] In one embodiment, the transmission chain includes: a roller mounting frame, a rotating shaft group arranged on the roller mounting frame, and a driver; wherein the driver is suitable for driving the rotating shaft group to rotate so as to transport the battery cells.

[0013] In one embodiment, the rotating shaft group includes: a plurality of driving shafts and a plurality of driven shafts; a sprocket is provided at one end of the driving shaft; and the driver drives the sprockets to rotate through a chain.

[0014] In one embodiment, the rotating shaft group includes: a plurality of driving shafts and a plurality of driven shafts; a first bevel gear is provided at one end of the driving shaft; the first bevel gears are connected to each other through a synchronous connecting rod, and a plurality of second bevel gears compatible with the first bevel gears and the driver are provided on the synchronous connecting rod; the driver is suitable for engaging with the second bevel gears through a third gear to drive the synchronous connecting rod to rotate.

[0015] In one embodiment, the rotating shaft group includes: a plurality of driving shafts and a plurality of driven shafts; two synchronous wheels are provided at one end of the driving shaft; the driver is suitable for being connected to a synchronous wheel in an adjacent driving shaft through a synchronous belt, and the other synchronous wheel of the driving shaft is connected to the adjacent driving shaft.

[0016] In one embodiment, a porous plate is provided below each layer of the conveying chain.

[0017] In one embodiment, the driven shaft includes: a mounting seat and a plurality of idler wheels arranged on the mounting seat; both ends of the mounting seat and the driving shaft are respectively provided with corresponding limit blocks; wherein both ends of the mounting seat located at the entrance are arranged as guide blocks.

[0018] In one of the embodiments, a guide rail lifting device is provided at the feed port and / or the discharge port; the guide rail lifting device comprises: a screw drive and a forward assembly; the screw drive is suitable for driving the forward assembly to lift and lower, and the forward assembly is suitable for driving the battery cells to be transmitted to the transmission chain.

[0019] In one embodiment, an independent fireproof door is provided at the end of each layer of the transmission chain; each fireproof door is provided at the feed port or the discharge port of the tunnel furnace body.

[0020] The beneficial effect of the utility model is that the multi-layer tunnel furnace is provided with multi-layer transmission chains in the tunnel furnace body, and each transmission chain can be used to transport perovskite cells, thereby greatly increasing the annealing efficiency; at the same time, in order to make the perovskite cells on each layer of transmission chain anneal evenly, the scheme arranges heating flow equalizer plates and exhaust flow equalizer plates on the heating furnace core module and the exhaust module respectively, so that the hot air flow in the tunnel furnace body flows evenly, preventing the hot air flow from being locally concentrated and affecting the annealing quality of the perovskite cells.

[0021] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the multi-layer tunnel furnace in the longitudinal direction of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the multi-layer tunnel furnace in the width direction of the utility model;

[0026] Figure 3 It is a structural schematic diagram of the first heating furnace module;

[0027] Figure 4 It is a schematic diagram of the structure of the first transmission chain;

[0028] Figure 5 It is a schematic diagram of the structure of the second transmission chain;

[0029] Figure 6 It is a schematic diagram of the structure of the third transmission chain;

[0030] Figure 7 It is a schematic diagram of the structure of the driven shaft;

[0031] Figure 8It is a structural schematic diagram of the second heating furnace module.

[0032] In the figure:

[0033] Tunnel furnace body 1, bottom plate 11, feed port 12, and discharge port 13;

[0034] Multilayer transmission chain 2, transmission chain 21, roller mounting frame 22, rotating shaft group 23, driving shaft 231, sprocket 2311, first bevel gear 2312, synchronous wheel 2313, driven shaft 232, mounting seat 2321, idler wheel 2322, synchronous connecting rod 233, second bevel gear 2331, limit block 234, guide block 235, driver 24, chain 241, third gear 242, synchronous belt 243;

[0035] The first heating furnace module 3, the heating flow equalizer plate 31, the "U"-shaped mounting frame 32, the electric heating rod 33, the air inlet 34, the wind wheel group 35, and the flow equalizer chamber 36;

[0036] Exhaust module 4, exhaust pipe 41;

[0037] Exhaust flow equalizer plate 5;

[0038] The second heating furnace module 6;

[0039] Guide rail lifting device 7, screw driver 71, and forward assembly 72. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] like Figure 1 , Figure 2 As shown, at least one embodiment provides a multi-layer tunnel furnace, which includes: a tunnel furnace body 1, a feed port 11 and a discharge port 12 are respectively arranged at both ends of the tunnel furnace body 1, a multi-layer transmission chain 2 is arranged in the tunnel furnace body 1, and at least one layer of exhaust flow equalizer 5 is arranged below each layer of transmission chain 21 in the multi-layer transmission chain 2, first heating furnace core modules 3 are respectively arranged on both sides of the multi-layer transmission chain 2, and an exhaust module 4 is arranged at the bottom of the multi-layer transmission chain 2; wherein the first heating furnace core module 3 is provided with at least one layer of heating flow equalizer 31 on the side facing the multi-layer transmission chain 2.

[0042] In some embodiments, specifically, in order to increase the annealing efficiency of the perovskite cell, the present solution sets a multi-layer transmission chain 2 in the tunnel furnace body 1, and each transmission chain 2 can be used to transport the perovskite cell, thereby greatly increasing the annealing efficiency; at the same time, in order to make the perovskite cell on each layer of the transmission chain 2 anneal evenly, the present solution sets at least one layer of heating flow plate 31 in the heating furnace module 3, so that the hot air flow in the tunnel furnace body 1 flows evenly, preventing the hot air flow from being locally concentrated and affecting the annealing quality of the perovskite cell.

[0043] In some embodiments, optionally, a liftable second heating furnace module 6 is provided above the multi-layer conveying chain 2 .

[0044] In some embodiments, specifically, arranging a heating furnace module 3 above the multi-layer conveying chain 2 can make the heating more uniform.

[0045] In some embodiments, a bottom plate 11 is arranged between the tunnel furnace body 1 and the exhaust module 4; the exhaust module 4 also includes: an exhaust pipe 41 connected to the bottom plate 11; the multi-layer transmission chain 2 and the first heating furnace module 3 are both arranged on the bottom plate 11.

[0046] In this embodiment, specifically, the bottom plate 11 is inside the tunnel furnace body 1 and is used to install the multi-layer transmission chain 2, the heating furnace liner modules 3 and the exhaust module 4 on both sides to form a chamber for annealing perovskite cells inside the tunnel furnace body 1.

[0047] like Figure 3 and Figure 8 As shown, in some embodiments, the first heating furnace tube module 3 and the second heating furnace tube module 6 both include: a "U"-shaped mounting frame 32; and a plurality of electric heating rods 33, which are evenly inserted on the "U"-shaped mounting frame 32 along the conveying direction of the transmission chain 2, and the heating part thereof is located in the "U"-shaped mounting frame 32; wherein a plurality of air inlets 34 are opened at the bottom of the "U"-shaped mounting frame 32, and a wind wheel group 35 is installed; the opening of the "U"-shaped mounting frame 32 is suitable for installing the heating uniform flow plate 31, so that a uniform flow cavity 36 is formed in the "U"-shaped mounting frame 32.

[0048] In some embodiments, specifically, the wind wheel group 35 is used to draw external normal temperature airflow, and the normal temperature airflow is heated by the electric heating rod 33, stabilized by the flow-uniform chamber 36, and then output.

[0049] like Figure 4 As shown, in some embodiments, the transmission chain 2 includes: a roller mounting frame 22 and a rotating shaft group 23 arranged on the roller mounting frame 22, and a driver 24; wherein the driver 24 is suitable for driving the rotating shaft group 23 to rotate to transport the perovskite cell sheet.

[0050] like Figure 4 As shown, in one application scenario, the rotating shaft group 23 includes: a plurality of driving shafts 231 and a plurality of driven shafts 232; a sprocket 2311 is provided at one end of the driving shaft 231; and the driver 24 drives each sprocket 2311 to rotate through a chain 241.

[0051] like Figure 5 As shown, in one application scenario, the rotating shaft group 23 includes: a plurality of driving shafts 231 and a plurality of driven shafts 232; a first bevel gear 2312 is provided at one end of the driving shaft 231; each of the first bevel gears 2312 is connected by a synchronization link 233, and a plurality of second bevel gears 2331 adapted to the first bevel gears 2312 and the driver 24 are provided on the synchronization link 233; the driver 24 is suitable for meshing with the second bevel gears 2331 through a third gear 242 to drive the synchronization link 233 to rotate.

[0052] like Figure 6 As shown, in one application scenario, the rotating shaft group 23 includes: a plurality of driving shafts 231 and a plurality of driven shafts 232; two synchronous wheels 2313 are provided at one end of the driving shaft 231; the driver 24 is suitable for being connected to a synchronous wheel 2313 in the adjacent driving shaft 231 through a synchronous belt 243, and the other synchronous wheel 2313 of the driving shaft 231 is connected to the adjacent driving shaft 231.

[0053] like Figure 1 As shown, in some embodiments, the perovskite cell is raised to the height of the corresponding transmission chain 2 by a guide rail lifting device and enters from the corresponding feed port, and then the guide rail lifting device transports the perovskite cell to the corresponding transmission chain 2; the transmission chain 2 takes over the perovskite cell and drives the perovskite cell to move in the tunnel furnace to complete annealing. After annealing is completed, the perovskite cell is discharged from the discharge port of the tunnel furnace and then received by another guide rail lifting device.

[0054] like Figure 7 As shown, in some embodiments, the driven shaft 232 includes: a mounting seat 2321 and a plurality of idler wheels 2322 arranged on the mounting seat 2321; both ends of the mounting seat 2321 and the driving shaft 231 are respectively provided with corresponding limit blocks 234; wherein both ends of the mounting seat 2321 located at the entrance are set as guide blocks 235.

[0055] In some embodiments, specifically, the limit block 234 can prevent the perovskite cell from deviating from the conveying surface of the conveying chain 2; wherein the function of the guide block 235 is to facilitate the conveying chain 2 to receive the perovskite cell.

[0056] like Figure 2As shown, in some embodiments, an exhaust flow equalizer plate 5 is provided below each layer of the transmission chain 2, and the exhaust flow equalizer plate 5 may be a porous structure.

[0057] In some embodiments, specifically, the exhaust flow equalizer plate 5 serves to prevent foreign objects from falling from above and damaging the perovskite cell sheet below, and also facilitates the circulation of hot air to ensure uniform hot air flow in each layer of the cavity.

[0058] In some embodiments, a guide rail lifting device 7 is provided at the feed port 12 and / or the discharge port 13; the guide rail lifting device 7 includes: a screw drive 71 and a forward component 72; the function of the forward component 72 is to transfer the battery cells to the transmission chain 2, and the screw drive 71 can drive the forward component 72 to rise and fall to correspond to the transmission chain 2 of different heights, so as to facilitate loading; wherein, the forward component 72 can be but is not limited to a sprocket chain structure.

[0059] In some embodiments, an independent fireproof door is provided at the end of each layer of the conveying chain 2; each fireproof door is arranged on the feed port 12 or the discharge port 13 of the tunnel furnace body; when the battery cells are delivered to the corresponding conveying chain 2, the door is closed for annealing, thereby reducing heat loss. At the same time, the doors of each layer are independently arranged without affecting each other, thereby improving mass production and saving space; wherein, the position and structure of the fireproof door are not shown in the figure.

[0060] In summary, the present multi-layer tunnel furnace is provided with multi-layer transmission chains 2 in the tunnel furnace body 1, and each transmission chain 2 can be used to transport perovskite cells, thereby greatly increasing the annealing efficiency; at the same time, in order to make the perovskite cells on each layer of transmission chains 2 anneal evenly, the present solution is provided with a heating flow plate 31 on the heating furnace module 3, and the heating flow plate 31 can be a porous structure. Thus, the hot air flow in the tunnel furnace body 1 flows evenly, preventing the hot air flow from being locally concentrated and affecting the annealing quality of the perovskite cells.

[0061] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0062] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0064] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A multi-layer tunnel furnace, characterized in that: include: A tunnel furnace body, and a material inlet and a material outlet arranged at both ends of the tunnel furnace body, wherein a multi-layer transmission chain is arranged in the tunnel furnace body; in At least one layer of exhaust flow equalizer is arranged below each layer of the multi-layer transmission chain.

2. The multi-layer tunnel furnace according to claim 1, characterized in that: The first heating furnace modules are respectively arranged on both sides of the multi-layer transmission chain, and the exhaust module is arranged at the bottom of the multi-layer transmission chain; At least one layer of heating flow equalizer is arranged on the side of the first heating furnace module facing the multi-layer transmission chain.

3. The multi-layer tunnel furnace according to claim 2, characterized in that: A liftable second heating furnace module is arranged above the multi-layer transmission chain.

4. The multi-layer tunnel furnace according to claim 2, characterized in that: A bottom plate is provided between the tunnel furnace body and the exhaust module; The exhaust module further comprises: an exhaust pipe connected to the bottom plate; The multi-layer transmission chain and the first heating furnace module are both arranged on the bottom plate.

5. The multi-layer tunnel furnace according to claim 3, characterized in that: The first heating furnace module and the second heating furnace module both include: "U" shaped mounting frame; and Several electric heating rods are evenly inserted on the "U"-shaped installation frame along the conveying direction of the transmission chain, and the heating part thereof is located inside the "U"-shaped installation frame; wherein The bottom of the "U"-shaped installation frame is provided with a plurality of air inlets and a wind wheel assembly is installed; and The opening of the "U"-shaped installation frame is suitable for installing at least one layer of the heating flow-uniform plate, so that a flow-uniform cavity is formed in the "U"-shaped installation frame.

6. The multi-layer tunnel furnace according to claim 1, characterized in that: The transmission chain comprises: a roller mounting frame, a rotating shaft group arranged on the roller mounting frame, and a driver; wherein The driver is suitable for driving the rotating shaft group to rotate so as to transport the battery slices.

7. The multi-layer tunnel furnace according to claim 6, characterized in that: The rotating shaft group includes: a plurality of driving shafts and a plurality of driven shafts; A sprocket is provided at one end of the driving shaft; The driver drives each sprocket to rotate through a chain.

8. The multi-layer tunnel furnace according to claim 7, characterized in that: The rotating shaft group includes: a plurality of driving shafts and a plurality of driven shafts; A first helical gear is provided at one end of the driving shaft; The first bevel gears are connected to each other through a synchronous connecting rod, and the synchronous connecting rod is provided with a plurality of second bevel gears adapted to the first bevel gears and the driver; The driver is adapted to mesh with the second bevel gear through the third gear to drive the synchronous connecting rod to rotate.

9. The multi-layer tunnel furnace according to claim 7, characterized in that: The rotating shaft group includes: a plurality of driving shafts and a plurality of driven shafts; Two synchronous wheels are arranged at one end of the driving shaft; The driver is suitable for being connected to a synchronous wheel in a nearby driving shaft through a synchronous belt, and another synchronous wheel of the driving shaft is connected to an adjacent driving shaft.

10. The multi-layer tunnel furnace according to any one of claims 7 to 9, characterized in that: The driven shaft comprises: a mounting seat and a plurality of idler wheels arranged on the mounting seat; The mounting seat and the two ends of the driving shaft are respectively provided with corresponding limit blocks; Both ends of the mounting seat located at the entrance are arranged as guide blocks.

11. The multi-layer tunnel furnace according to claim 1, characterized in that: A guide rail lifting device is provided at the feed inlet and / or the discharge outlet; The guide rail lifting device comprises: a screw drive and a forward assembly; The screw drive is suitable for driving the forward assembly to rise and fall, and the forward assembly is suitable for driving the battery sheet to be transmitted to the transmission chain.

12. The multi-layer tunnel furnace according to claim 1, characterized in that: The ends of the transmission chains at each layer are provided with independent fire doors; Each of the fireproof doors is arranged at the feed inlet or the discharge outlet of the tunnel furnace body.

Images