Sintering device

Abstract

The utility model discloses a sintering device which comprises a hearth provided with an inner cavity penetrating in the first direction. The transmission assembly is arranged in the inner cavity, the transmission assembly comprises a plurality of rotating parts and driving parts which are arranged at intervals in the first direction, the driving parts are fixed in the inner cavity, the rotating parts are connected with the driving ends of the driving parts, and the driving parts are used for driving the rotating parts to rotate so as to convey the battery pieces in the first direction; and the heating part is used for heating the inner cavity. According to the arrangement, the battery piece can be driven by the rotating piece to move in the first direction, and due to the fact that the rotating piece enables the battery piece to rotate fixedly, no fixed contact point exists when the battery piece is sintered in the hearth, the battery piece can be heated more evenly, the sintering quality is greatly improved, and then the efficiency and the A-level rate of the battery are improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery cell sintering, and in particular to a sintering device. Background Art

[0002] The development of silicon solar cells has reached a point where the silicon material itself, battery technology, and the auxiliary materials and equipment surrounding the entire industrial chain are all making continuous progress and achieving major breakthroughs.

[0003] In terms of battery structure and technology, large-scale production of batteries has evolved from the earliest aluminum back surface field (Al-BSF) battery to the passivated emitter and rear surface (Passivated Emitter and Rear Cell, PERC) battery technology, and then to the optimization of the front emitter, the superposition and promotion of selective emitter (SE) battery technology and PERC technology, and now to the Topcon high-efficiency silicon tunneling oxide passivated contact battery technology. Battery efficiency has also increased from about 15% in the early days to about 26% today, which can be said to be a very rapid development speed. Of course, the update and iteration of battery technology is inseparable from the improvement of manufacturing equipment, matching auxiliary materials, and the quality of the battery raw material silicon wafer itself.

[0004] However, no matter how the battery technology is updated and iterated, the method of preparing metallization has never changed. The preparation method of battery electrodes is still achieved by silk screen sintering, and the indicators related to the silk screen sintering section are the most numerous and the most critical. At present, most of the sintering furnaces are designed to be crawler-type. After the silicon wafers come in, they are placed on the crawler. The movement of the crawler brings the silicon wafers to areas with different set temperatures, and finally completes the sintering of the slurry and the silicon wafers. Such a crawler design has two main disadvantages. First, the battery cells will contact the fixed position of the support teeth on the crawler, resulting in insufficient heating at the contact position, resulting in defective cells and affecting battery efficiency. Second, the crawler moves, and it always passes through the cooling zone and the lower normal temperature zone, which causes the crawler temperature to drop. When the wafer is loaded into the furnace again, the temperature will be unstable due to the low temperature, resulting in defective cells and affecting battery efficiency.

[0005] Therefore, the sintering device has the following disadvantages:

[0006] 1. Due to insufficient temperature at the contact position of the battery cell, there will be a certain proportion of ejector pin marks and black edges.

[0007] 2. As the crawler belt keeps rotating, it passes through the cooling zone and the normal temperature zone at the bottom of the furnace body, so the temperature of the crawler belt will drop. When it enters the heating temperature zone again, due to its own low temperature, it will cause the temperature inside the furnace body to fluctuate, resulting in an unstable temperature field and a certain proportion of fog and black. Utility Model Content

[0008] The present application discloses a sintering device, in which a fixed and self-rotating transmission assembly is arranged in a furnace. The transmission assembly includes a rotating part and a driving part, so that the driving part drives the rotating part to rotate, thereby driving the battery cells on the rotating part to move, so that the battery cells have no fixed contact points when sintering in the furnace, which can make the battery cells more evenly heated and greatly improve the sintering quality of the battery cells.

[0009] In order to achieve the above-mentioned purpose, the present application discloses a sintering device, including: a furnace, the furnace having an inner cavity running through along a first direction; a transmission assembly, the transmission assembly is arranged in the inner cavity, the transmission assembly includes a plurality of rotating members and a driving member arranged at intervals along the first direction, the driving member is fixed in the inner cavity, the rotating member is connected to the driving end of the driving member, and the driving member is used to drive the rotating member to rotate so as to transport the battery cell along the first direction; and a heating part, the heating part is used to heat the inner cavity.

[0010] In a first possible implementation, the plurality of rotating members have a working state in which they rotate simultaneously, and the plurality of rotating members have a stopping state in which they stop simultaneously. When the plurality of rotating members are in the working state, the transmission assembly is used to transport the battery cells.

[0011] In a first possible implementation manner, the rotation axes of the multiple rotating members are parallel to each other and extend along the second direction.

[0012] In a first possible implementation, the transmission assembly includes a first transmission group and a second transmission group, the first transmission group and the second transmission group are arranged opposite to each other along a second direction, the second direction is perpendicular to the first direction, the inner cavity includes a first cavity wall and a second cavity wall, the first cavity wall and the second cavity wall are arranged opposite to each other along the second direction, wherein the first transmission group is arranged on the first cavity wall, and the second transmission group is arranged on the second cavity wall, wherein the first transmission group and the second transmission group are both composed of multiple rotating parts.

[0013] In a first possible implementation, the rotating member includes: a first rotating portion, the first rotating portion being connected to a driving portion of a driving member, and the driving member being configured to rotate the first rotating portion;

[0014] The second rotating part is connected to the end of the first rotating part away from the driving member, and the second rotating part is used to support and transport the battery cells; wherein the first rotating part and the second rotating part are arranged with the same axis, and the cross-sectional area of ​​the first rotating part is larger than the cross-sectional area of ​​the second rotating part.

[0015] In a first possible implementation manner, the rotating part is made of ceramic material.

[0016] In the first possible implementation method, the heating part also includes: a heating wire, which is arranged in the furnace wall of the furnace and is used to heat the inner cavity; a connecting seat, which is two and is arranged oppositely on the outer wall of the furnace, one end of the connecting seat is connected to the external circuit, and the other end of the connecting seat is arranged in the side wall of the furnace and is electrically connected to the heating wire, and the connecting seat is used to provide electrical energy to the heating wire.

[0017] In a first possible implementation, one end of the heating wire is connected to a connecting socket, and the other end of the heating wire is connected to another connecting socket. The two heating wires are arranged opposite to each other in the furnace wall to form a heating wire group.

[0018] In a first possible implementation manner, there are multiple heating wire groups, and the multiple heating wire groups are arranged sequentially along the first direction.

[0019] In a first possible implementation, the sintering device further includes an external controller electrically connected to the transmission assembly and the heating part, and the external controller is used to control the rotation speed of the transmission assembly and the temperature of the heating part.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] In the present application, the furnace has an inner cavity that passes through along a first direction, and the transmission assembly is arranged in the inner cavity. The transmission assembly includes a plurality of rotating parts and driving parts arranged at intervals along the first direction. The driving part is fixed in the inner cavity, and the rotating part is connected to the driving end of the driving part. The driving part is used to drive the rotating part to rotate so as to transport the battery cell along the first direction. The heating part is used to heat the inner cavity so that the battery cell can move in the first direction under the drive of the rotating part, and because the rotating part is fixed and self-rotating, the battery cell has no fixed contact point when sintering in the furnace, which can make the battery cell heated more evenly, greatly improve the sintering quality, and thereby improve the efficiency and A-grade rate of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic structural diagram of a first embodiment of a sintering device provided by an embodiment of the present utility model;

[0024] Figure 2 A schematic structural diagram of a second embodiment of a sintering device provided by an embodiment of the present utility model;

[0025] Figure 3 This is a structural schematic diagram of a third embodiment of a sintering device provided by an embodiment of the present utility model.

[0026] Description of reference numerals:

[0027] 10-furnace; 11-inner cavity;

[0028] 20-transmission assembly; 200-first transmission group; 201-second transmission group; 21-rotating member; 210-driving member; 211-first rotating part; 212-second rotating part;

[0029] 30-heating part; 31-heating wire; 32-connecting seat;

[0030] 40-cell. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] In this application, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0033] Furthermore, the terms "first," "second," and the like are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0034] Currently, most sintering furnaces are designed with a crawler belt. After the cells are loaded, they rest on the belt. The movement of the belt carries the cells to different temperature zones, ultimately completing the sintering of the slurry and silicon wafers. This crawler belt design has two main disadvantages. First, the cells will contact the fixed position of the support teeth on the track, resulting in insufficient heating at the contact point, resulting in defective cells and affecting cell efficiency. Second, the track always passes through the cooling zone and the lower normal temperature zone during movement, causing the track temperature to drop. When the cells are loaded into the furnace again, the temperature is unstable due to the lower temperature, resulting in defective cells and affecting cell efficiency.

[0035] In view of this, some embodiments of the present application provide a sintering device, which includes a furnace, a transmission assembly and a heating part. The transmission assembly includes a plurality of rotating parts and driving parts arranged at intervals along a first direction. The driving part is fixed in the inner cavity, and the rotating part is connected to the driving end of the driving part. The driving part is used to drive the rotating part to rotate so as to transport the battery cell along the first direction. The heating part is used to heat the inner cavity so that the battery cell can move along the first direction under the drive of the rotating part. Since the rotating part is fixed and self-rotating, there is no fixed contact point when the battery cell is sintered in the furnace, so that every part of the battery cell can be fully exposed to the inner cavity, which can make the heating of the battery cell more uniform, greatly improve the sintering quality, and thereby improve the efficiency and A-level rate of the battery.

[0036] The present application is described in detail below through specific embodiments:

[0037] like Figures 1 to 3 As shown, the sintering device of the embodiment of the present application includes: a furnace 10, the furnace 10 has an inner cavity 11 that passes through along a first direction; a transmission assembly 20, the transmission assembly 20 is arranged in the inner cavity 11, the transmission assembly 20 includes a plurality of rotating members 21 and a driving member 210 that are spaced apart along the first direction, the driving member 210 is fixed in the inner cavity 11, the rotating member 21 is connected to the driving end of the driving member 210, and the driving member 210 is used to drive the rotating member 21 to rotate, so as to be used for conveying the battery cell 40 along the first direction; a heating part 30, the heating part 30 is used to heat the inner cavity 11.

[0038] In this embodiment, the furnace 10 has an inner cavity 11 extending along a first direction. The transmission assembly is disposed within the inner cavity 11. The transmission assembly 20 includes a plurality of rotating members 21 and a driving member 210 spaced apart along the first direction. The driving member 210 is fixed within the inner cavity 11. The rotating member 21 is connected to the driving end of the driving member 210. The driving member 210 is used to drive the rotating member 21 to rotate so as to transport the battery cell along the first direction. The heating unit 30 is used to heat the inner cavity so that the battery cell 40 can move along the first direction under the drive of the rotating member 21. Since the rotating member 21 is fixed and self-rotating, the battery cell 40 has no fixed contact points during sintering within the furnace 10. This allows the battery cell 40 to be heated more evenly, greatly improving the sintering quality, and thereby improving the efficiency and A-grade rate of the battery. The sintering process of the battery cell 40 is a key step in the manufacturing process, which directly affects the performance of the battery cell. The main purpose of sintering is to form a good ohmic contact between the screen-printed electrode material and the silicon wafer, thereby increasing the open circuit voltage and fill factor of the cell 40, and promoting the passivation of the solar cell, thereby improving the conversion efficiency. During the sintering process, under the action of high temperature, the metal electrode material reacts with the silicon on the surface of the silicon wafer to form an alloy system. As the temperature drops, the silicon atoms in the alloy system recrystallize and form an epitaxial layer between the silicon wafer and the metal electrode to achieve good ohmic contact. Commonly used materials for cell wafers are single crystal silicon, polycrystalline silicon and amorphous silicon. The sintering device of this application is suitable for cell wafers of different materials. It should be explained here that the A-level rate of a battery usually refers to the efficiency level that reaches or exceeds a certain standard during the manufacturing and testing process of the battery, where A-level represents higher efficiency and performance. This efficiency usually refers to the ability of the battery to convert chemical energy into electrical energy, that is, the conversion efficiency of the battery.

[0039] Specifically, the plurality of rotating members 21 have a working state in which they rotate simultaneously, and the plurality of rotating members 21 have a stopping state in which they stop simultaneously. When the plurality of rotating members 21 are in the working state, the transmission assembly 20 is used to transport the battery cells 40 .

[0040] In this embodiment, multiple rotating parts 21 have a working state of rotating simultaneously, and multiple rotating parts 21 have a stopping state of stopping simultaneously. When multiple rotating parts 21 are in the working state, the transmission assembly 20 is used to transport the battery cells 40 so that the rotating parts 21 can rotate simultaneously, thereby ensuring that the battery cells 40 can move stably on the transmission assembly 20, effectively preventing the battery cells 40 from falling off or offsetting during movement, and protecting the battery cells 40.

[0041] Furthermore, the rotation axes of the plurality of rotating members 21 are parallel to each other and extend along the second direction.

[0042] In this embodiment, the rotation axes of the multiple rotating members 21 are parallel to each other and extend along the second direction. This allows the multiple rotating members 21 to remain parallel, thereby providing stable support for the battery cells 40 and effectively preventing the battery cells 40 from falling off or shifting during movement, thereby protecting the battery cells 40.

[0043] Furthermore, if Figure 2 As shown, the transmission assembly 20 includes a first transmission group 200 and a second transmission group 201, and the first transmission group 200 and the second transmission group 201 are arranged relatively along a second direction, and the second direction is perpendicular to the first direction. The inner cavity 11 includes a first cavity wall and a second cavity wall, and the first cavity wall and the second cavity wall are arranged relatively along the second direction, wherein the first transmission group 200 is arranged on the first cavity wall, and the second transmission group 201 is arranged on the second cavity wall, wherein the first transmission group 200 and the second transmission group 201 are both composed of multiple rotating parts 21.

[0044] In this embodiment, the transmission assembly 20 includes a first transmission group 200 and a second transmission group 201, and the inner cavity 11 includes a first cavity wall and a second cavity wall, wherein the first cavity wall and the second cavity wall are arranged opposite to each other along the second direction, wherein the first transmission group 200 is arranged on the first cavity wall, and the second transmission group 201 is arranged on the second cavity wall. This arrangement ensures that the first transmission group 200 and the second transmission group 201 are arranged opposite to each other in the inner cavity 11, so that the first transmission group 200 and the second transmission group 201 can jointly support the battery cell 40, effectively ensuring that the battery cell 40 can be stably transported during sintering, and effectively preventing the battery cell 40 from falling off or offsetting during movement.

[0045] Furthermore, if Figure 3 As shown, the rotating member 21 includes: a first rotating part 211, the first rotating part 211 is connected to the driving part of the driving member 210, and the driving member 210 is used to rotate the first rotating part 211; a second rotating part 212, the second rotating part 212 is connected to an end of the first rotating part 211 away from the driving member 210, and the second rotating part 212 is used to support and transport the battery cell 40; wherein, the first rotating part 211 and the second rotating part 212 are arranged with the same axis, and the cross-sectional area of ​​the first rotating part 211 is larger than the cross-sectional area of ​​the second rotating part 212.

[0046] In this embodiment, the rotating member 21 includes: a first rotating part 211 and a second rotating part 212, the first rotating part 211 is connected to the driving part of the driving member 210, the driving member 210 is used to rotate the first rotating part 211, the second rotating part 212 is connected to the end of the first rotating part 211 away from the driving member 210, the second rotating part 212 is used to support and transport the battery cell 40, and the first rotating part 211 and the second rotating part 212 are arranged with the same axis. This arrangement effectively ensures that the first rotating part 211 can be stably connected to the second rotating part 212, and effectively prevents the second rotating part 212 from being displaced or broken during rotation. The first rotating part 211 has a cross-sectional area greater than that of the second rotating part 212, and the diameter of the first rotating part 211 is greater than the diameter of the second rotating part 212. Since the second rotating part 212 is mainly used to support and transport the battery cell 40, in order to reduce the contact area between the second rotating part 212 and the battery cell 40, the diameter of the second rotating part 212 should be reduced as much as possible. The first rotating part 211 is to ensure the hardness of the rotating part 21 and effectively prevent the rotating part 21 from breaking. The first rotating part 211 plays a transition role.

[0047] Furthermore, the rotating member 21 is made of ceramic material.

[0048] The rotating part 21 of this embodiment is made of ceramic material. Ceramic material is usually made of natural silicate minerals (such as clay, quartz, etc.), which is an inorganic non-metallic material with the characteristics of high melting point, high hardness, high wear resistance and oxidation resistance. Its main production process includes crushing and mixing, molding and calcining. The rotating part 21 can also be made of high-temperature resistant materials such as stainless steel plated with high-temperature black titanium. Stainless steel plated with high-temperature black titanium has the following characteristics: Corrosion resistance: The surface corrosion resistance and wear resistance of black titanium stainless steel plate are stronger than ordinary stainless steel. Durability: It can resist salt spray corrosion and discoloration under ultraviolet light. Decorativeness: It has the advantages of colorful, bright colors, bright tones, softness, elegance, and strong smoothness. This application does not limit the material of the rotating part 21 here, and it can be selected according to actual conditions.

[0049] In another embodiment of the present application, the heating part 30 includes: a heating wire 31, the heating wire 31 is arranged in the furnace wall of the furnace 10, and the heating wire 31 is used to heat the inner cavity 11; a connecting seat 32, there are two connecting seats 32, and the two connecting seats 32 are arranged oppositely on the outer wall of the furnace 10, one end of the connecting seat 32 is connected to the external circuit, and the other end of the connecting seat 32 is arranged in the side wall of the furnace 10 and electrically connected to the heating wire 31, and the connecting seat 32 is used to provide electrical energy to the heating wire 31.

[0050] In this embodiment, the heating part 30 includes a heating wire 31 and a connecting seat 32. The connecting seat 32 effectively provides electrical energy to the heating wire 31, thereby effectively ensuring that the heating wire 31 can stably heat the inner cavity 11 and ensure the sintering efficiency and sintering quality of the battery cell 40.

[0051] It should be noted that a heating wire, also known as an electric heating wire or heating wire, is a common heating element used to convert electrical energy into thermal energy. Commonly used materials include iron-chromium-aluminum and nickel-chromium alloys, which have good oxidation resistance. This application also allows heating using methods such as heating lamps, but this application does not limit the specific heating method.

[0052] Furthermore, if Figure 1 As shown, one end of the heating wire 31 is connected to a connecting seat 32, and the other end of the heating wire 31 is connected to another connecting seat 32. The two heating wires 31 are arranged opposite to each other in the furnace wall of the furnace 10 to form a heating wire group.

[0053] In this embodiment, one end of the heating wire 31 is connected to a connecting seat 32, and the other end of the heating wire 31 is connected to another connecting seat 32. This arrangement effectively surrounds the furnace 10 with the heating wire, thereby ensuring the uniformity of the temperature rise and heating inside the furnace 10.

[0054] Specifically, there are multiple heating wire groups, and the multiple heating wire groups are arranged in sequence along the first direction.

[0055] In this embodiment, multiple heating wire groups are arranged in sequence along the first direction. This arrangement can effectively ensure that the temperature inside the furnace 10 can be more evenly distributed in the furnace 10 when it is increased, thereby effectively ensuring the quality of battery sintering.

[0056] In the first embodiment of the present application, the sintering device further includes an external controller, which is electrically connected to the transmission assembly 20 and the heating part 30 , and is used to control the rotation speed of the transmission assembly 20 and the temperature of the heating part 30 .

[0057] In this embodiment, the sintering apparatus further includes an external controller electrically connected to the transmission assembly 20 and the heating unit 30. This arrangement allows the operator to control the rotation of the transmission assembly 20 and the rotation speed through the external controller. It should be noted that the rotation speed of the transmission assembly 20 is selected based on actual conditions and is not limited herein. Furthermore, the external controller can communicate with the transmission assembly 20 and the heating unit 30 via signals, effectively ensuring the rotation speed of the transmission assembly 20.

[0058] From the above description, it can be seen that the above embodiments of the present invention can make the battery cell 40 heated more evenly without fixed contact points, greatly improving the sintering quality, thereby improving the efficiency and A-grade rate of the battery.

[0059] Finally, 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sintering device, characterized in that: include: A furnace (10), wherein the furnace (10) has an inner cavity (11) extending in a first direction; A transmission assembly (20), the transmission assembly (20) being arranged in the inner cavity (11), the transmission assembly (20) comprising a plurality of rotating members (21) and a driving member (210) spaced apart along the first direction, the driving member (210) being fixed in the inner cavity (11), the rotating member (21) being connected to a driving end of the driving member (210), and the driving member (210) being used to drive the rotating member (21) to rotate, so as to transport the battery cell (40) along the first direction; A heating portion (30), wherein the heating portion (30) is used to heat the inner cavity (11).

2. The sintering device according to claim 1, characterized in that: The plurality of rotating members (21) have a working state of rotating simultaneously, and the plurality of rotating members (21) have a stopping state of stopping simultaneously. When the plurality of rotating members (21) are in the working state, the transmission assembly (20) is used to transport the battery cell (40).

3. The sintering device according to claim 2, characterized in that: The rotation axes of the plurality of rotating members (21) are parallel to each other and extend along a second direction, which is perpendicular to the first direction.

4. The sintering device according to claim 3, characterized in that: The transmission assembly (20) includes a first transmission group (200) and a second transmission group (201), the first transmission group (200) and the second transmission group (201) are arranged relative to each other along a second direction, the second direction is perpendicular to the first direction, the inner cavity (11) includes a first cavity wall and a second cavity wall, the first cavity wall and the second cavity wall are arranged relative to each other along the second direction, wherein the first transmission group (200) is arranged on the first cavity wall, and the second transmission group (201) is arranged on the second cavity wall, wherein the first transmission group (200) and the second transmission group (201) are both composed of a plurality of rotating parts (21).

5. The sintering device according to claim 3, characterized in that: The rotating member (21) comprises: a first rotating portion (211), the first rotating portion (211) being connected to a driving portion of the driving member (210), and the driving member (210) being used to rotate the first rotating portion (211); a second rotating portion (212), the second rotating portion (212) being connected to an end of the first rotating portion (211) away from the driving member (210), the second rotating portion (212) being used for supporting and transporting the battery cell (40); The first rotating part (211) and the second rotating part (212) are arranged with the same axis, and the cross-sectional area of ​​the first rotating part (211) is larger than the cross-sectional area of ​​the second rotating part (212).

6. The sintering device according to claim 5, characterized in that: The rotating member (21) is made of ceramic material.

7. The sintering device according to claim 1, characterized in that: The heating unit (30) includes: a heating wire (31), the heating wire (31) being arranged in the furnace wall of the furnace (10), the heating wire (31) being used to heat the inner cavity (11); A connecting seat (32), wherein there are two connecting seats (32), and the two connecting seats (32) are arranged on the outer side wall of the furnace (10) opposite to each other, one end of the connecting seat (32) is connected to the external circuit, and the other end of the connecting seat (32) is arranged in the side wall of the furnace (10) and electrically connected to the heating wire (31), and the connecting seat (32) is used to provide electrical energy to the heating wire (31).

8. The sintering device according to claim 7, characterized in that: One end of the heating wire (31) is connected to one connecting seat (32), and the other end of the heating wire (31) is connected to another connecting seat (32). The two heating wires (31) are arranged opposite to each other in the furnace wall of the furnace chamber (10) to form a heating wire group.

9. The sintering device according to claim 8, characterized in that: There are multiple heating wire groups, and the multiple heating wire groups are arranged in sequence along the first direction.

10. The sintering device according to claim 1, characterized in that: The sintering device further comprises an external controller, which is electrically connected to the transmission component (20) and the heating part (30), and is used to control the rotation speed of the transmission component (20) and the temperature of the heating part (30).

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