Uniform-diffusion diffusion furnace for battery piece production

Abstract

The invention provides a uniform-diffusion diffusion furnace for producing battery pieces, which comprises a furnace body, a furnace door is rotatably arranged on one side of the furnace body, a mixing assembly is arranged in the furnace body, an air outlet box is fixedly connected to the inner wall of the furnace body, a placing table is arranged below the air outlet box, and the top of the furnace body is communicated with an air inlet header pipe. The mixing assembly comprises a mixing box arranged in the furnace body, a first mixing cavity and a second mixing cavity are formed in the mixing box, the inner wall of the mixing box is fixedly connected with a communicating pipe, the bottom of the mixing box communicates with an air outlet pipe, and rotating rods are rotationally arranged on the inner wall of the first mixing cavity and the inner wall of the second mixing cavity. The uniform-diffusion diffusion furnace for battery piece production solves the problems that an existing device is poor in mixing and stirring degree, gas entering from a first gas inlet pipe and gas entering from a second gas inlet pipe cannot be better mixed, and the using effect is poor.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell production, and in particular to a diffusion furnace for producing battery cells with uniform diffusion. Background Art

[0002] Topcon cells are a type of solar cell with tunneling oxide passivation contacts based on the principle of selective carriers. Topcon cells need to be diffused in a diffusion furnace during production. The diffusion process is the most critical process in the entire topcon cell preparation process. The diffusion process generates a PN junction, and the uniformity and controllability of the PN junction have always been the focus of solar cell research. Phosphorus oxychloride is usually used as a phosphorus source for gas source diffusion. When a diffusion furnace diffuses topcon cells, because diffusion requires oxygen and other gases, existing diffusion furnaces are not convenient for mixing gases, resulting in uneven diffusion and poor diffusion uniformity.

[0003] The patent with publication number CN219513121U discloses a diffusion furnace for producing topcon battery cells with uniform diffusion, which can make the mixed gas more uniform when discharged, so as to evenly diffuse the topcon battery cells in the diffusion furnace and improve the diffusion uniformity. However, when the diffusion furnace mixes the gas through the stirring mechanism, since the first air inlet pipe and the second air inlet pipe are respectively located on the upper and lower sides of the diffusion furnace, the stirring mechanism has poor mixing and stirring in the upper and lower directions when it is running, and the gas coming in from the first air inlet pipe and the gas coming in from the second air inlet pipe cannot be better mixed, resulting in poor use effect. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a diffusion furnace for producing battery cells with uniform diffusion, comprising a furnace body, a furnace door is rotatably provided on one side of the furnace body, a mixing assembly is arranged inside the furnace body, an air outlet box is fixedly connected to the inner wall of the furnace body, a placement table is arranged below the air outlet box, the top of the furnace body is connected to an air intake main pipe, and air intake branches are connected on both sides of the air intake main pipe.

[0005] Preferably, the mixing assembly includes a mixing box arranged inside the furnace body, the mixing box is respectively provided with a first mixing chamber and a second mixing chamber, the inner wall of the mixing box is fixedly connected with a connecting pipe, the bottom of the mixing box is connected with an air outlet pipe, the inner walls of the first mixing chamber and the second mixing chamber are both rotatably provided with rotating rods, four rotating plates are fixedly connected to the outer side of the rotating rods, and the bottom of the air inlet manifold is connected to one side of the top of the mixing box.

[0006] Preferably, a support plate is fixedly connected to the inner wall of the furnace body, and the bottom of the mixing box is fixedly connected to the top of the support plate.

[0007] Preferably, an air pump is provided inside the furnace body, and one end of the air pump is connected to the air outlet pipe.

[0008] Preferably, one end of the vacuum pump is connected to an exhaust pipe, a partition is provided inside the furnace body, and one end of the exhaust pipe passes through the partition and is connected to one side of the air outlet box.

[0009] Preferably, a diverter plate is fixedly connected to the inner wall of the air outlet box, and a plurality of diverter holes are opened inside the diverter plate.

[0010] Preferably, a fixing seat is fixedly connected to one side of the furnace body, and a motor is fixedly connected to the top of the fixing seat.

[0011] Preferably, the output end of the motor is fixedly connected to a first pulley, the outer side of the first pulley is connected to a second pulley via a belt drive, and the axes of the first pulley and the second pulley are fixedly connected to one end of two rotating rods.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The diffusion furnace for producing uniformly diffused battery cells opens the furnace door and places the battery cells on a placement table inside the furnace body. The corresponding gases enter the air intake main pipe through two air intake branch pipes, and the gases are preliminarily mixed through the air intake main pipe. The preliminarily mixed gases are mixed again through the mixing component to make the gas mixing more uniform. The mixed gases are discharged through the air outlet box, thereby uniformly diffusing the battery cells.

[0014] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description and the drawings.

[0015] The technical solution of the present application is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of a preferred embodiment of a diffusion furnace for producing uniformly diffused battery cells provided by the present invention;

[0018] Figure 2It is a schematic diagram of the internal structure of the furnace body shown in the present invention;

[0019] Figure 3 It is a structural schematic diagram of the air extraction pump shown in the present invention;

[0020] Figure 4 It is a structural schematic diagram of the mixing assembly shown in the present invention;

[0021] Figure 5 It is a schematic diagram of the internal structure of the air outlet box shown in the present invention.

[0022] Numbers in the figure: 1. furnace body; 2. furnace door; 3. mixing assembly; 31. mixing box; 32. first mixing chamber; 33. second mixing chamber; 34. connecting pipe; 35. exhaust pipe; 36. rotating rod; 37. rotating plate; 4. air outlet box; 5. placement table; 6. air intake main pipe; 7. air intake branch pipe; 8. support plate; 9. vacuum pump; 10. exhaust pipe; 11. partition; 12. diverter plate; 13. diverter hole; 14. fixing seat; 15. motor; 16. first pulley; 17. second pulley. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0026] Furthermore, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0027] See also Figure 1-Figure 5A diffusion furnace for producing uniformly diffused battery cells comprises a furnace body 1, a furnace door 2 is rotatably provided on one side of the furnace body 1, a mixing assembly 3 is provided inside the furnace body 1, an air outlet box 4 is fixedly connected to the inner wall of the furnace body 1, a placing table 5 is provided below the air outlet box 4, an air intake main pipe 6 is connected to the top of the furnace body 1, and air intake branches 7 are connected to both sides of the air intake main pipe 6.

[0028] Open the furnace door 2 and place the battery cells on the placement table 5 inside the furnace body 1. The corresponding gas enters the air intake main pipe 6 through the two air intake branches 7. The gas is preliminarily mixed through the air intake main pipe 6. The preliminarily mixed gas is mixed again through the mixing component 3 to make the gas mixing more uniform. The mixed gas is discharged through the air outlet box 4, thereby evenly diffusing the battery cells.

[0029] In the specific implementation process, Figure 4 As shown, the mixing assembly 3 includes a mixing box 31 arranged inside the furnace body 1, and a first mixing chamber 32 and a second mixing chamber 33 are respectively arranged inside the mixing box 31. A connecting pipe 34 is fixedly connected to the inner wall of the mixing box 31, and an air outlet pipe 35 is connected to the bottom of the mixing box 31. Rotating rods 36 are rotatably arranged on the inner walls of the first mixing chamber 32 and the second mixing chamber 33, and four rotating plates 37 are fixedly connected to the outer side of the rotating rod 36. The bottom of the air inlet manifold 6 is connected to one side of the top of the mixing box 31.

[0030] The preliminarily mixed gas enters the first mixing chamber 32 inside the mixing box 31 through the air intake manifold 6, and the rotating plate 37 is driven to rotate by the rotating rod 36 in the first mixing chamber 32 to stir and mix the gas inside the first mixing chamber 32. The gas enters the second mixing chamber 33 through the connecting pipe 34, and the rotating plate 37 is driven to rotate by the rotating rod 36 in the second mixing chamber 33 to stir and mix the gas inside the second mixing chamber 33, thereby mixing the gas multiple times to improve the mixing effect and mixing efficiency. The mixed gas is discharged through the outlet pipe 35.

[0031] A support plate 8 is fixedly connected to the inner wall of the furnace body 1 , and the bottom of the mixing box 31 is fixedly connected to the top of the support plate 8 , so that the mixing box 31 is supported and fixed by the support plate 8 .

[0032] An air pump 9 is disposed inside the furnace body 1 , and one end of the air pump 9 is connected to the air outlet pipe 35 .

[0033] One end of the vacuum pump 9 is connected to an exhaust pipe 10 , a partition 11 is provided inside the furnace body 1 , and one end of the exhaust pipe 10 passes through the partition 11 and is connected to one side of the air outlet box 4 .

[0034] The mixed gas is sucked from the gas outlet pipe 35 by the suction pump 9 and discharged into the exhaust pipe 10 , thereby delivering the gas to the air outlet box 4 .

[0035] A diverter plate 12 is fixedly connected to the inner wall of the air outlet box 4. A plurality of diverter holes 13 are provided inside the diverter plate 12. The gas inside the air outlet box 4 is discharged through the plurality of diverter holes 13 inside the diverter plate 12, thereby evenly diffusing the battery cells.

[0036] A fixing seat 14 is fixedly connected to one side of the furnace body 1 , and a motor 15 is fixedly connected to the top of the fixing seat 14 .

[0037] The output end of the motor 15 is fixedly connected to a first pulley 16 , and the outer side of the first pulley 16 is connected to a second pulley 17 via a belt transmission. The axes of the first pulley 16 and the second pulley 17 are fixedly connected to one end of two rotating rods 36 .

[0038] The motor 15 is supported and fixed by the fixing seat 14 , and the motor 15 drives the second belt pulley 17 to rotate through the first belt pulley 16 , thereby driving the two rotating rods 36 to rotate.

[0039] When in use, the furnace door 2 is opened and the battery cells are placed on the placement table 5 inside the furnace body 1. The corresponding gases enter the air intake main pipe 6 through the two air intake branches 7, and the gases are preliminarily mixed through the air intake main pipe 6. The preliminarily mixed gases enter the first mixing chamber 32 inside the mixing box 31 through the air intake main pipe 6, and the rotating plate 37 is driven to rotate by the rotating rod 36 in the first mixing chamber 32 to stir and mix the gases inside the first mixing chamber 32. The gases enter the second mixing chamber 33 through the connecting pipe 34, and the rotating plate 37 is driven to rotate by the rotating rod 36 in the second mixing chamber 33 to stir and mix the gases inside the second mixing chamber 33, thereby mixing the gases multiple times to improve the mixing effect and mixing efficiency. The mixed gases are drawn into the air outlet pipe 35 through the vacuum pump 9 and discharged into the exhaust pipe 10, thereby transporting the gases to the air outlet box 4, and the gases inside the air outlet box 4 are discharged through the plurality of diversion holes 13 inside the diversion plate 12, thereby evenly diffusing the battery cells.

[0040] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0041] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention).

[0042] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A diffusion furnace for producing uniformly diffused battery cells, characterized in that: The invention comprises a furnace body (1), a furnace door (2) is rotatably provided on one side of the furnace body (1), a mixing assembly (3) is provided inside the furnace body (1), an air outlet box (4) is fixedly connected to the inner wall of the furnace body (1), a placement platform (5) is provided below the air outlet box (4), the top of the furnace body (1) is connected to an air intake main pipe (6), and both sides of the air intake main pipe (6) are connected to air intake branch pipes (7).

2. The diffusion furnace for producing uniformly diffused battery cells according to claim 1, characterized in that: The mixing assembly (3) comprises a mixing box (31) arranged inside the furnace body (1), wherein a first mixing chamber (32) and a second mixing chamber (33) are respectively arranged inside the mixing box (31), a connecting pipe (34) is fixedly connected to the inner wall of the mixing box (31), an air outlet pipe (35) is connected to the bottom of the mixing box (31), rotating rods (36) are rotatably arranged on the inner walls of the first mixing chamber (32) and the second mixing chamber (33), four rotating plates (37) are fixedly connected to the outer side of the rotating rod (36), and the bottom of the air intake manifold (6) is connected to one side of the top of the mixing box (31).

3. The diffusion furnace for producing uniformly diffused battery cells according to claim 2, characterized in that: A support plate (8) is fixedly connected to the inner wall of the furnace body (1), and the bottom of the mixing box (31) is fixedly connected to the top of the support plate (8).

4. The diffusion furnace for producing uniformly diffused battery cells according to claim 1, characterized in that: An air extraction pump (9) is arranged inside the furnace body (1), and one end of the air extraction pump (9) is connected to the air outlet pipe (35).

5. The diffusion furnace for producing uniformly diffused battery cells according to claim 4, characterized in that: One end of the vacuum pump (9) is connected to an exhaust pipe (10), a partition (11) is provided inside the furnace body (1), and one end of the exhaust pipe (10) passes through the partition (11) and is connected to one side of the air outlet box (4).

6. The diffusion furnace for producing uniformly diffused battery cells according to claim 1, characterized in that: A diverter plate (12) is fixedly connected to the inner wall of the air outlet box (4), and a plurality of diverter holes (13) are provided inside the diverter plate (12).

7. The diffusion furnace for producing uniformly diffused battery cells according to claim 1, characterized in that: A fixing seat (14) is fixedly connected to one side of the furnace body (1), and a motor (15) is fixedly connected to the top of the fixing seat (14).

8. The diffusion furnace for producing uniformly diffused battery cells according to claim 7, characterized in that: The output end of the motor (15) is fixedly connected to a first pulley (16), the outer side of the first pulley (16) is connected to a second pulley (17) via a belt transmission, and the axes of the first pulley (16) and the second pulley (17) are fixedly connected to one end of two rotating rods (36).

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