A heating furnace and a curing furnace

Abstract

The application relates to a heating furnace body and a curing furnace. The heating furnace body comprises an outer shell body with material conveying ports at two ends, a conveying mechanism, a heating mechanism, a gas injection mechanism and a gas exhaust mechanism. The conveying mechanism is used for conveying a flower basket carrying battery pieces. The gas injection mechanism is used for injecting gas into the inner part of the outer shell body. The heating mechanism is used for heating at least the battery pieces carried by the flower basket. The gas exhaust mechanism is arranged in the inner part of the outer shell body and is used for exhausting the gas in the inner part of the outer shell body, so that the oxidation of the wet grid lines to be dried does not occur, or the copper oxide in the grid lines is reduced into copper, the influence of the copper oxide is excluded, and the power generation efficiency of the battery pieces is improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic cell manufacturing technology, and in particular to a heating furnace body and a curing furnace. Background Technology

[0002] Screen printing and drying / curing are crucial processes for forming electrodes on the surface of photovoltaic cells. Specifically, silver or aluminum-containing metal pastes are first printed onto the cell surface and then heated and cured to form dry grid lines with a certain degree of hardness. Due to the high cost of silver and aluminum pastes, the industry currently uses copper-containing pastes instead to form electrodes.

[0003] However, after the existing heating furnace body dries and cures the wet grid wires containing copper, the copper in the grid wires comes into contact with the oxygen in the furnace body and oxidizes, producing copper oxide, which reduces the power generation efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a heating furnace body and a curing furnace to solve the technical problem in the prior art that copper oxide still exists in the grid lines after drying and curing, which affects the power generation efficiency.

[0005] To achieve the above objectives, this application adopts the following technical solution: A heating furnace body includes an outer shell with material inlets at both ends. The heating furnace body also includes a conveying mechanism, a heating mechanism, a gas injection mechanism, and an exhaust mechanism disposed within the outer shell. The conveying mechanism is disposed at the bottom inside the outer shell and is used to convey a basket carrying battery cells. The gas injection mechanism is used to inject inert gas and / or reducing gas into the interior of the outer shell. The heating mechanism is used to heat the battery cells carried in the basket. The exhaust mechanism is disposed on one of the inner wall, upper part, or lower part of the outer shell and is used to exhaust the gas inside the outer shell.

[0006] By setting an outer shell with a material transfer port, the conveying mechanism, heating mechanism, gas injection mechanism, and exhaust mechanism are located inside the outer shell. This allows the basket carrying the solar cells to be placed in an inert gas environment and / or a reducing gas environment and to be heated. This prevents the copper-containing paste printed onto the solar cells from oxidizing, or reduces the copper oxide in the grid lines to copper, thus eliminating the influence of copper oxide and improving the power generation efficiency of the solar cells.

[0007] Optionally, the conveying mechanism is used to convey the flower basket along a first horizontal direction. The conveying mechanism includes a conveying driver and a set of rollers with their rotation axes parallel to a second horizontal direction. The set of rollers is arranged along the first horizontal direction, which is perpendicular to the second horizontal direction. The conveying driver is used to drive the set of rollers to convey the flower basket along the first horizontal direction.

[0008] The conveyor system transports baskets containing solar cells, processing a large number of solar cells at a time, which greatly increases the production capacity of the heating furnace.

[0009] Optionally, the conveying mechanism may also include several carrier plates, one carrier plate for carrying a flower basket; or, A carrier plate is used to support a row of flower baskets, which consists of 2 to 15 flower baskets arranged along a first horizontal direction on the carrier plate; or, A carrier plate is used to support two rows of flower baskets side by side, each row of flower baskets consisting of 2 to 15 flower baskets, and each row of flower baskets is arranged along a first horizontal direction.

[0010] A support plate is added between the roller and the flower basket to prevent the flower basket from slipping when it comes into direct contact with the roller, thus preventing production accidents such as the flower basket tipping over.

[0011] Optionally, the heating mechanism includes a meandering electric heating tube located on at least one side of the flower basket.

[0012] By incorporating an electric heating element, the interior of the outer casing can be rapidly heated, ensuring that the internal temperature meets the requirements for drying, curing, and reduction.

[0013] Optionally, the heating furnace body also includes a partition. When a carrier plate is used to support two rows of flower baskets side by side, the partition is fixedly connected to the upper part of the outer shell, and the partition is located between the two rows of flower baskets and is higher than the carrier plate; or... When the conveying mechanism includes two parallel rows of carrier plates, one carrier plate is used to carry one row of flower baskets, the partition is fixedly connected to the upper part of the outer casing, the partition is located between the two rows of flower baskets and is at least higher than the rollers.

[0014] By setting up a partition, two process chambers are formed inside the inner casing, which process the battery cells in the two process chambers separately. This improves space utilization, increases production efficiency, and significantly reduces interference between the two process chambers.

[0015] Optionally, the gas injection mechanism includes a primary gas pipe and a secondary gas pipe connected by a gas path. The primary gas pipe is connected to the gas supply pipe of the gas source equipment. The gas supply pipe provides reducing gas or inert gas to the primary gas pipe. The primary gas pipe extends in a vertical direction, and the secondary gas pipe extends in a first horizontal direction. An air outlet is provided on the side of the secondary gas pipe facing the flower basket.

[0016] By setting up primary and secondary gas pipes, inert or reducing gases supplied by the gas source equipment can be introduced into the outer casing, so that the grid lines of the solar cells are in a suitable gas environment to meet the process requirements.

[0017] Optionally, when a carrier plate is used to carry two rows of flower baskets side by side, the conveying mechanism includes two sets of rollers, each set of rollers for carrying a carrier plate carrying one or one row of flower baskets; or, The transmission mechanism includes a set of rollers for carrying at least one pair of carrier plates, with two of the carrier plates in each pair arranged along a second horizontal direction, and each carrier plate for carrying one or a row of flower baskets.

[0018] By setting the number and position of carrier plates, it is possible to match production capacity with upstream and downstream workstations and improve space utilization.

[0019] Optionally, flap valves are provided at the material inlets at both ends of the outer casing. The flap valves include a first driving part, a valve stem, and a door panel. The door panel is fixedly mounted on the valve stem, and the valve stem is rotatably mounted on the outer casing. The first driving part drives the valve stem to rotate so as to fasten the door panel to the material inlet of the outer casing. A sealing structure is provided on the side of the door panel facing the outer casing. After the door panel is driven to fasten with the material inlet, the material inlet is sealed.

[0020] By setting a flap valve, the inner shell becomes a sealed cavity, preventing external oxygen from entering and causing the slurry to oxidize, thus improving the drying and curing effect of the grid lines.

[0021] Optionally, a gate valve is provided at the material inlet at both ends of the outer casing. The gate valve includes a second drive unit and a gate. The second drive unit is used to drive the gate to fall, thereby sealing the material inlet of the outer casing.

[0022] By setting a flap valve, the inner shell becomes a sealed cavity, preventing external oxygen from entering and causing the slurry to oxidize, thus improving the drying and curing effect of the grid lines.

[0023] Optionally, the curing oven includes a preheating oven body, a heating oven body, and a cooling oven body connected in sequence. The preheating oven body is used to preheat the solar cells to a temperature of not less than 100°C. The heating oven body is used to provide an inert gas environment and / or a reducing gas environment for the solar cells and to heat and cure the moist grid lines. The cooling oven body is used to cool the heated and cured solar cell grid lines to a temperature of less than 150°C.

[0024] By setting up a preheating furnace, a heating furnace, and a cooling furnace that are connected in sequence, the solar cells in the basket are preheated, heated and cured, and cooled in sequence. This allows the grid lines of the solar cells to be dried and cured at a suitable temperature, and cooled to below 150°C before being taken out of the furnace, so as to prevent the copper-containing grid lines from being oxidized again after being exposed to oxygen after being taken out of the furnace. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the heating furnace body provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a heating furnace body with a portion of the outer shell removed, as provided in an embodiment of this application. Figure 3 This is a schematic diagram of the heating mechanism in the outer casing provided in an embodiment of this application; Figure 4 This is a cross-sectional structural diagram of the outer casing provided in an embodiment of this application; Figure 5 A partial structural schematic diagram of the conveying mechanism provided in an embodiment of this application; icon: 1. Heating furnace body; 11. Outer shell; 111. Material inlet; 112. Flip valve; 1121. Valve stem; 1122. Door panel; 12. Conveying mechanism; 121. Roller; 122. Carrier plate; 13. Gas injection mechanism; 131. Primary gas pipe; 132. Secondary gas pipe; 14. Exhaust mechanism; 15. Heating mechanism; 151. Electric heating element; 16. Partition plate; 2. Flower basket; 21. Battery cell. Detailed Implementation

[0027] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] This application aims to solve at least one technical problem existing in the prior art. Specifically, the embodiments of this application provide a heating furnace body 1 and a curing furnace to solve the technical problem that copper oxide still exists in the grid lines after drying and curing, which affects the power generation efficiency.

[0029] To achieve the above objectives, this application adopts the following technical solution: like Figure 1As shown, a heating furnace body 1 includes an outer shell 11 with material inlets 111 at both ends. The heating furnace body 1 also includes a conveying mechanism 12, a heating mechanism 15, a gas injection mechanism 13, and an exhaust mechanism 14 disposed within the outer shell 11. The conveying mechanism 12 is disposed at the bottom of the inner side of the outer shell 11 and is used to convey a basket 2 carrying battery cells 21. The gas injection mechanism 13 is used to inject inert gas and / or reducing gas into the outer shell 11. The heating mechanism 15 is used to heat the battery cells 21 carried by the basket 2. The exhaust mechanism 14 is disposed on one of the inner wall, upper part, or lower part of the outer shell 11 and is used to exhaust the gas inside the outer shell 11.

[0030] The outer casing 11 forms a space for drying and curing processes. The material transfer ports 111 at both ends of the outer casing 11 can be used to transfer the solar cells 21, facilitating automated processing. The heating furnace body 1 also includes a conveying mechanism 12, a heating mechanism 15, a gas injection mechanism 13, and a venting mechanism 14. The conveying mechanism 12, located at the bottom of the outer casing 11, can be used to transfer the solar cells 21 or containers holding the solar cells 21, such as battery boxes or baskets 2, facilitating the processing of large batches of solar cells 21 at once and increasing production capacity. The gas injection mechanism 13 is connected to an external gas source and is used to introduce inert gas and / or reducing gas into the outer casing 11, ensuring that the passing solar cells 21 are in an inert gas environment and / or a reducing gas environment. This ensures that the copper-containing paste printed onto the solar cells 21 does not oxidize or reduce the copper oxide in the grid lines to copper, eliminating the influence of copper oxide and improving the power generation efficiency of the solar cells 21. The venting mechanism 14 continuously vents the gas inside the outer casing 11 to prevent any oxygen present inside from oxidizing the copper in the grid lines.

[0031] Considering both economic and technological efficiency, nitrogen can be selected as the inert gas; considering both economic and technological efficiency, hydrogen can be selected as the reducing gas. If only technological efficiency is considered, other inert or reducing gases can also be selected, as long as they can fill the internal space of the outer casing 11 to expel oxygen or reduce copper oxide.

[0032] Of course, considering the potential shortage of workshop space, the heating furnace body 1 can integrate more functions. For example, the heating furnace body 1 can also be equipped with cooling elements inside or outside the outer casing 11 for cooling the interior of the outer casing 11. The cooling elements can be a combination of compressor, fan, and pipes to inject cold air into the outer casing 11, thereby cooling the solar cells. Alternatively, the heating mechanism 15 can gradually heat up to a predetermined temperature during the process, providing appropriate preheating treatment for the solar cells before the formal heating and drying process. This configuration allows a single heating furnace body 1 to complete the grid line curing of a batch of solar cells, improving space utilization.

[0033] like Figure 5 The conveying mechanism 12 can convey the flower basket 2 along a first horizontal direction. The conveying mechanism 12 includes a conveying driver (not shown) and a set of rollers 121 with their rotation axes parallel to a second horizontal direction. The set of rollers 121 are arranged along the first horizontal direction, which is perpendicular to the second horizontal direction. The conveying driver drives the set of rollers 121 to convey the flower basket 2 along the first horizontal direction. The rollers 121 of the conveying mechanism 12 directly convey the flower basket 2 containing a large number of battery cells 21, allowing for the drying and curing of a large number of battery cells 21 at a time, significantly improving the production capacity of the heating furnace 1. In the figure, the X direction represents the first horizontal direction, and the Y direction represents the second horizontal direction.

[0034] Generally speaking, if the flower basket 2 is used as the container for holding the battery cells 21, the bottom surface of the flower basket 2 is prone to slipping when it contacts the roller 121 and is being transported, ultimately causing multiple flower baskets 2 to collide and tip over. Therefore, if... Figure 2 , Figure 5 As shown, the conveying mechanism 12 further includes a plurality of carrier plates 122, one carrier plate 122 for carrying one flower basket 2; or, one carrier plate 122 for carrying a row of flower baskets 2, one row of flower baskets 2 including 2 to 15 flower baskets 2, the 2 to 15 flower baskets 2 being arranged on the carrier plate 122 along a first horizontal direction; or, one carrier plate 122 for carrying two rows of flower baskets 2 side by side, each row of flower baskets 2 including 2 to 15 flower baskets 2, each row of flower baskets 2 being arranged along a first horizontal direction.

[0035] After a carrier plate 122 is placed between the roller 121 and the flower basket 2, the carrier plate 122 is wider than the bottom plate of the flower basket 2, and has a larger contact area with the roller 121, making it less prone to slipping and preventing the flower basket 2 from slipping and eventually tipping over. Furthermore, a fixing structure that cooperates with the bottom plate of the flower basket 2 can also be provided on the upper surface of the carrier plate 122.

[0036] To ensure that the interior of the outer casing 11 can reach a suitable drying and curing temperature, such as Figure 2 As shown, the heating mechanism 15 includes a meandering electric heating tube 151 located on at least one side of the flower basket 2. Heat is generated by the electric heating tube 151, allowing the interior of the outer casing 11 to heat up rapidly to a suitable temperature for drying, curing, and reduction. Alternatively, other heating elements, such as infrared lamps or resistance wires, can also be used for the heating mechanism 15.

[0037] If the conveyor mechanism 12 conveys two rows of baskets 2 side by side, the drying and curing processes of the first and second rows of baskets 2 may interfere with each other. The exhaust gas generated during drying may flow laterally, contaminating the battery cells 21 in the other row of baskets 2. Therefore, please refer to... Figure 2The heating furnace body 1 also includes a partition 16. When a carrier plate 122 is used to carry two rows of flower baskets 2 side by side, the partition 16 is fixedly connected to the upper part of the outer shell 11. The partition 16 is located between the two rows of flower baskets 2 and is higher than the carrier plate 122. Alternatively, when the conveying mechanism 12 includes two parallel carrier plates 122, and one carrier plate 122 is used to carry one row of flower baskets 2, the partition 16 is fixedly connected to the upper part of the outer shell 11. The partition 16 is located between the two rows of flower baskets 2 and is at least higher than the roller 121 to prevent interference.

[0038] After the partition 16 is set in the middle of the outer shell 11, two process cavities are formed inside the inner shell, each accommodating a row of flower baskets 2. At the same time, the grid lines of the battery cells 21 in the two process cavities are dried and cured, which greatly reduces the interference between the two process cavities and improves the drying and curing effect.

[0039] If the heating furnace body 1 is provided with a partition 16, the heating element can be placed inside the partition 16. Specifically, the partition 16 includes two partitions 16, and the heating element is placed between the two partitions 16, thus achieving the same heating effect.

[0040] To ensure that the gas injection mechanism 13 injects gas evenly into the interior of the outer casing 11, such as Figure 3 As shown, the gas injection mechanism 13 includes at least a primary gas pipe 131 and a secondary gas pipe 132 that are connected by gas paths and extend perpendicularly to each other. The primary gas pipe 131 is connected to the gas supply pipe of the gas source equipment, which supplies reducing gas or inert gas to the primary gas pipe 131. The primary gas pipe 131 extends vertically, and the secondary gas pipe 132 extends horizontally. The secondary gas pipe 132 has an outlet hole on the side facing the flower basket 2. The primary gas pipe 131 and the secondary gas pipe 132 work together to introduce the inert gas or reducing gas supplied by the gas source equipment into the outer casing 11, so that the grid lines of the battery cell 21 are in a suitable gas environment to meet the process requirements.

[0041] If there is a partition 16 inside the outer shell 11, the two-stage air pipes and the flower basket 2 are located on the same side of the partition 16 to avoid the partition 16 blocking the gas blown out of the air outlet.

[0042] When a carrier plate 122 is used to carry two rows of flower baskets 2 side by side, the conveying mechanism 12 may include two sets of rollers 121, each set of rollers 121 being used to carry a carrier plate 122 carrying one or a row of flower baskets 2; or, the conveying mechanism may include a set of rollers 121, which are used to carry at least one pair of carrier plates 122, with two carrier plates 122 in each pair arranged along a second horizontal direction, and each carrier plate 122 being used to carry one or a row of flower baskets 2. The above configuration of the conveying mechanism 12, by setting the number and position of the carrier plates 122, can achieve the goals of matching production capacity with upstream and downstream workstations and improving space utilization.

[0043] To avoid interference with the processing of the heating furnace body 1 by the preceding and following work stations, flap valves 112 are installed at the material inlets 111 at both ends of the outer shell 11. Each flap valve 112 includes a first drive unit, a valve stem 1121, and a door plate 1122. The door plate 1122 is fixedly mounted on the valve stem 1121, which is rotatably mounted on the outer shell 11. The first drive unit drives the valve stem 1121 to rotate, thereby engaging the door plate 1122 with the material inlet 111 of the outer shell 11. A sealing structure is provided on the side of the door plate 1122 facing the outer shell 11. After the door plate 1122 is engaged with the material inlet 111, the material inlet 111 is sealed. After the flap valve 112 seals and engages the material inlet 111, the inner shell becomes a sealed cavity, preventing external oxygen from entering the cavity and causing oxidation of the slurry, thus improving the drying and curing effect of the grid wires.

[0044] Alternatively, a slide gate valve may be provided at the material inlets 111 at both ends of the housing 11. The slide gate valve includes a second drive unit and a gate. The second drive unit is used to drive the gate to fall, thereby sealing the material inlets 111 of the housing 11. This achieves the same technical effect as the flap valve 112.

[0045] Similarly, one embodiment is similar to the structure of the slide gate valve and can achieve the same technical effect: a horizontal sliding door assembly can be provided at the material inlets 111 at both ends of the outer casing 11. The horizontal sliding door assembly can include a horizontal sliding guide rail, a horizontal sliding drive component, and a sealing door. The sealing door is slidably mounted on the horizontal sliding guide rail, and the horizontal sliding drive component drives the sealing door to move along the horizontal sliding guide rail to close the material inlet 111 for processing or to remove the material inlet 111 for basket entry and exit.

[0046] This application also provides a curing oven, which includes a preheating section, a heating section, and a cooling section connected in sequence. The preheating section may include at least one preheating furnace body, inside which a heating element is provided, capable of preheating the solar cell temperature to not less than 100°C. The heating section includes at least one heating furnace body 1, used to provide an inert gas environment and / or a reducing gas environment for the solar cell and to heat and cure the moistened grid lines. The cooling section includes at least one cooling furnace body, inside which a cooling element, such as a fan, is provided, used to cool the heat-cured solar cell grid lines to below 150°C.

[0047] Through the above settings, the battery cells 21 in the flower basket 2 are subjected to preheating, heating and curing and cooling treatment in sequence, so that the grid lines of the battery cells 21 are dried and cured at a suitable temperature, and cooled to below 150°C before leaving the furnace, so as to prevent the copper grid lines from being oxidized again after leaving the furnace when they come into contact with oxygen.

[0048] It should be noted that in the description of this application, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] It should be noted that, in the description of this application, the terms "connection" and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or a connection through an intermediate medium; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify or combine the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A heating furnace body, characterized in that, The heating furnace body includes an outer shell with material inlets at both ends. The heating furnace body also includes a conveying mechanism, a heating mechanism, a gas injection mechanism, and an exhaust mechanism disposed inside the outer shell. The conveying mechanism is located at the bottom inside the outer shell and is used to convey a basket carrying battery cells. The gas injection mechanism is used to inject inert gas and / or reducing gas into the outer shell. The heating mechanism is used to heat at least the battery cells carried in the basket. The exhaust mechanism is located on one of the inner wall, upper part, or lower part of the outer shell and is used to exhaust gas from inside the outer shell.

2. The heating furnace body according to claim 1, characterized in that, The conveying mechanism is used to convey the flower basket along a first horizontal direction. The conveying mechanism includes a conveying driver and a set of rollers with their rotation axes parallel to a second horizontal direction. The set of rollers is arranged along the first horizontal direction, which is perpendicular to the second horizontal direction. The conveying driver is used to drive the set of rollers to convey the flower basket along the first horizontal direction.

3. The heating furnace body according to claim 2, characterized in that, The conveying mechanism further includes several carrier plates, one of which is used to carry a flower basket; or... One of the carrier plates is used to support a row of flower baskets, the row of flower baskets comprising 2 to 15 flower baskets, the 2 to 15 flower baskets being arranged along a first horizontal direction on the carrier plate; or, One of the carrier plates is used to support two rows of flower baskets side by side, each row of flower baskets including 2 to 15 flower baskets, each row of flower baskets being arranged along a first horizontal direction.

4. The heating furnace body according to claim 3, characterized in that, The heating mechanism includes a meandering electric heating tube located on at least one side of the flower basket.

5. The heating furnace body according to claim 3, characterized in that, The heating furnace body also includes a partition. When one of the carrier plates is used to support two rows of flower baskets side by side, the partition is fixedly connected to the upper part of the outer shell. The partition is located between the two rows of flower baskets and is higher than the carrier plate. or, When the conveying mechanism includes two parallel rows of carrier plates, one of which is used to carry one row of flower baskets, the partition is fixedly connected to the upper part of the outer casing, and the partition is located between the two rows of flower baskets and is at least higher than the rollers.

6. The heating furnace body according to claim 3, characterized in that, The gas injection mechanism includes a primary gas pipe and a secondary gas pipe connected by a gas path. The primary gas pipe is connected to the gas supply pipe of the gas source equipment. The gas supply pipe provides reducing gas or inert gas to the primary gas pipe. The primary gas pipe extends in a vertical direction, and the secondary gas pipe extends in a first horizontal direction. The secondary gas pipe has an air outlet on the side facing the flower basket.

7. The heating furnace body according to claim 3, characterized in that, When one of the carrier plates is used to carry two rows of flower baskets side by side, the conveying mechanism includes two sets of rollers, each set of rollers for carrying a carrier plate carrying one or a row of flower baskets; or, The conveying mechanism includes a set of rollers for carrying at least one pair of the carrier plates, with two of the carrier plates in each pair arranged along a second horizontal direction, and each carrier plate in each pair for carrying one or a row of flower baskets.

8. The heating furnace body according to claim 1, characterized in that, A flap valve is provided at the material transfer port. The flap valve includes a first driving part, a valve stem, and a door plate. The door plate is fixedly mounted on the valve stem, and the valve stem is rotatably mounted on the outer shell. The first driving part drives the valve stem to rotate so as to fasten the door plate to the material transfer port of the outer shell. The door plate is provided with a sealing structure on the side facing the outer shell. After the door plate is driven to fasten to the material transfer port, the material transfer port is sealed.

9. The heating furnace body according to claim 1, characterized in that, A slide gate valve is provided at the material inlet at both ends of the outer casing. The slide gate valve includes a second driving part and a gate. The second driving part is used to drive the gate to fall down, thereby sealing the material inlet of the outer casing.

10. A curing oven, characterized in that, The curing oven includes a preheating section, a heating section, and a cooling section connected in sequence. The preheating section is used to preheat the battery cells to a temperature not lower than 100°C. The heating section includes at least one heating furnace body as described in any one of claims 1-9. The heating section is used to provide an inert gas environment and / or a reducing gas environment for the battery cells and to heat and cure the moistened grid lines. The cooling section is used to cool the heated and cured battery cell grid lines to a temperature below 150°C.

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