Multi-section type transmission curing oven
By designing a multi-stage transmission curing furnace in HJT battery manufacturing, and using a combination of partitions and gate mechanisms, the problem of inert gas and heat loss is solved, and efficient heating and curing of battery sheets is achieved.
Patent Information
- Application Number
- CN202411724881.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-01-21
AI Technical Summary
In HJT battery manufacturing, multiple temperature zones are opened in the process chamber of the existing equipment, resulting in loss of inert gas and heat, affecting the heating and curing effect of the battery cell.
Design a multi-stage transmission curing furnace. By setting at least three partitions on the furnace body and establishing a one-to-one correspondence between the transmission mechanism and the gate mechanism, it ensures that only one partition is open to avoid gas and Massive loss of heat.
It effectively reduces the loss of inert gas and heat in the process chamber, ensures efficient heating and solidification of cells in an inert gas environment, and improves the quality and efficiency of cells.
Smart Images
Figure CN119334134A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of solar cell production, and in particular to a multi-stage transmission curing furnace. Background Art
[0002] In the manufacture of HJT cells, a drying and curing furnace is often used to dry and cure solar cells. In some special processes, in order to avoid surface passivation caused by surface oxidation of the cells, the heating and curing of the cells must be carried out in an inert gas environment. The process chamber of the existing equipment is equipped with multiple temperature zones, which are connected by a transmission mechanism. In the process of transporting the cells by the transmission mechanism, multiple temperature zones are in an open state, which leads to the risk of a large amount of inert gas loss in the process chamber, and due to the opening of the temperature zone, the heat in the temperature zone will also be lost. Summary of the invention
[0003] In order to overcome the above disadvantages, an object of the present invention is to provide a multi-stage transmission curing furnace, which can effectively reduce the loss of inert gas and heat in the process chamber.
[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: a multi-stage transmission curing furnace, comprising A furnace body, one end of which is a product inlet and the other end of which is a product outlet; the furnace body is provided with at least three partitions in sequence along the product transmission direction, and all the partitions together form a product channel connecting the product inlet and the product outlet; A transmission mechanism, the transmission mechanism comprising transmission components which are arranged in a one-to-one correspondence in the partition area and can operate independently, and the transmission components are used to transmit products in the product channel; A gate mechanism, the gate mechanism comprising an entrance gate, an exit gate and an intermediate gate which can be opened and closed independently to separate or connect the product channel, the entrance gate and the exit gate are respectively located at the product entrance and the product exit, and the intermediate gate is arranged one by one between two adjacent partitions; At least one of the entrance gate and the exit gate is in a closed state, and when the exit gate is in an open state, the intermediate gate closest to the exit gate is in a closed state; when the entrance gate is in an open state, the intermediate gate closest to the entrance gate is in a closed state.
[0005] The beneficial effects of the multi-stage transmission curing furnace of the present invention are: In the transmission mechanism, the independent transmission of the product in a single partition is ensured by the transmission components arranged one by one in correspondence with the partitions, so as to avoid the transmission of the product in any partition being affected by the transmission in other partitions; the multiple partitions of the furnace body can be opened and closed in sections by the setting of the gate mechanism, so as to avoid the large loss of gas and heat in the product channel caused by multiple partitions being in an open state at the same time; at least one of the entrance gate and the exit gate is set to a closed state, and when the entrance gate (or exit gate) is opened, the intermediate gate closest to the entrance gate (or exit gate) is closed, so that the product channel between the exit gate (or entrance gate) in a closed state and the intermediate gate closest to the entrance gate (or exit gate) is closed, thereby effectively avoiding the large loss of inert gas and heat in the product channel.
[0006] Furthermore, the entrance gate, the exit gate, and the intermediate gate all include door panels, guide columns, and lifting and closing driving members. The guide columns are installed on the top of the furnace body. The door panels vertically penetrate the top of the furnace body and can be lifted and moved along the guide columns under the action of the lifting and closing driving members. The guide columns can guide the moving direction of the door panels, so that the door panels can be lifted and opened and closed in the vertical direction.
[0007] Furthermore, the top of the furnace body is also provided with detection members corresponding to the entrance gate, the exit gate, and the intermediate gate, and the upper end of the door panel is provided with an in-place detection piece for detection by the detection member; when the detection member detects the in-place detection piece, the door panel is in a closed state. When the detection member detects the in-place detection piece, the lifting drive member stops running, and the door panel stops moving and remains in a closed state.
[0008] Furthermore, a stop block is provided at the upper end of the guide column for the door panel to abut against, and the upward movement position of the door panel can be limited by the setting of the stop block.
[0009] Furthermore, the junction of two adjacent partitions is provided with side baffles arranged on the two inner walls of the furnace body. When the door panel between the two partitions is in a closed state, the side baffles and the door panel can partially overlap in projection along the product transmission direction.
[0010] This arrangement is because during the process of raising and lowering the door panel, a gap is left between the door panel and the inner wall of the furnace body. When the door panel is in a closed state, inert gas may escape from the gap between the door panel and the inner wall of the furnace body. At this time, the escape of inert gas can be stopped by the setting of the side baffle to slow down the escape speed of the inert gas.
[0011] Furthermore, five separation zones are sequentially arranged on the furnace body. Along the product transmission direction, the five separation zones are sequentially an isolation zone, a preheating waiting zone, a constant temperature zone, a heat preservation isolation zone and a cooling zone; a waste outlet connected to the product channel is arranged at the top of the isolation zone.
[0012] Furthermore, the preheating waiting area and the constant temperature area are both provided with a heating module for heating the product channel, and the heating module is a single-cycle heating module or a double-cycle heating module. The setting of the heating module can heat and dry the products in the product channel.
[0013] Furthermore, the furnace body includes a pair of convection panels arranged opposite to each other, the top of the pair of convection panels is commonly provided with a top cover, and the bottom of the pair of convection panels is commonly provided with the product channel; and an air curtain is installed at one end of one of the convection panels close to the product inlet. The air curtain can distinguish the environment in the product channel from the external environment, which is conducive to the introduction of inert gas into the product channel.
[0014] Furthermore, a dust collecting mechanism installed on the furnace body is provided below the transmission mechanism. The dust collecting mechanism includes a dust box with an open upper end, the dust box extends along the product transmission direction, and the width of the dust box is greater than the width of the transmission mechanism. The dust collecting mechanism can collect dust falling from the conveying mechanism to reduce the risk of battery cell contamination.
[0015] Furthermore, a carrier reflux mechanism is provided below the furnace body, and a carrier lifting mechanism is provided between the transmission mechanism near the product entrance and the carrier reflux mechanism. Usually, the product is placed on the carrier for transmission. When the carrier carrying the product is transmitted to the product exit, the product will enter the next process, and the carrier can be refluxed to the product entrance through the carrier reflux mechanism, and then the carrier on the carrier reflux mechanism is lifted to the transmission mechanism by the carrier lifting mechanism to facilitate loading of the next product. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of a curing furnace with multi-stage transmission according to an embodiment of the present invention; Figure 2 for Figure 1 A partial enlarged view of the A part; Figure 3 It is a schematic diagram of the three-dimensional structure of a furnace body according to an embodiment of the present invention; Figure 4 for Figure 3 A partial enlarged view of the B area; Figure 5 for Figure 3 A partial enlarged view of area C in the middle.
[0017] In the figure: 1-furnace body; 11-dividing area; 111-isolating area; 1111-waste outlet; 112-preheating waiting area; 113-constant temperature area; 114-insulating isolating area; 115-cooling area; 12-side baffle; 13-top cover; 2-transmission mechanism; 21-transmission assembly; 211-transmission frame; 212-active roller; 213-carrying plate; 31-entrance gate; 311-door plate; 312-guide column; 313-in-place detection piece; 32-middle gate; 41-heating chamber; 42-circulating fan; 5- Air curtain machine; 6-Carrier return mechanism; 7-Dust collecting mechanism; 8-Joint roller set. DETAILED DESCRIPTION
[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0019] Example See attached Figure 1-3 As shown, a multi-stage transmission curing furnace of the present invention includes a furnace body 1, a transmission mechanism 2, and a gate mechanism, wherein one end of the furnace body 1 is a product entrance and the other end is a product exit; the furnace body 1 is provided with at least three partitions 11 in sequence along the product transmission direction, and all the partitions 11 together form a product channel connecting the product entrance and the product exit. The transmission mechanism 2 includes a transmission component 21 which is arranged in a one-to-one correspondence in the partitions 11 and can operate independently, and the transmission component 21 is used for the transmission of the product in the product channel. The gate mechanism includes an entrance gate 31, an exit gate (not shown in the figure), and an intermediate gate 32 which can be opened and closed independently to separate or connect the product channel, the entrance gate 31 and the exit gate are respectively located at the product entrance and the product exit, and the intermediate gate 32 is arranged in a one-to-one correspondence between two adjacent partitions 11. At least one of the entrance gate 31 and the exit gate is in a closed state, and when the exit gate 32 is in an open state, the intermediate gate 32 closest to the exit gate is in a closed state; when the entrance gate 31 is in an open state, the intermediate gate 32 closest to the entrance gate 31 is in a closed state.
[0020] In the initial state, the entrance gate 31, the exit gate and the intermediate gate 32 are all in a closed state. When the product is at the product entrance, the entrance gate 31 is opened, and the transmission component 21 in the partition 11 closest to the entrance gate 31 is started, and the product can enter the partition 11 closest to the entrance gate 31 along the product entrance. At this time, only the partition 11 closest to the entrance gate 31 is in an open state; when the product enters the first partition 11, the entrance gate 31 is closed. At this time, the product channel is kept in a closed environment under the action of the closed entrance gate 31 and the exit gate, and then the intermediate gate 32 can be opened at the same time or in sequence according to actual conditions, and the transmission component 21 is started, so that the product can be transmitted in sequence in multiple partitions 11; when the product is transmitted to near the exit gate, the exit gate is opened and the intermediate gate 32 closest to the exit gate is closed. At this time, only the partition 11 closest to the exit gate is in an open state, and the product immediately leaves the product channel along the product exit.
[0021] In the transmission mechanism 2, the transmission components 21 arranged one by one with the partitions 11 ensure the independent transmission of the product in a single partition 11, so as to avoid the transmission of the product in any partition 11 being affected by the transmission of other partitions 11, and when there is no product in the partition 11, the transmission component 21 in the partition 11 is suspended to achieve the purpose of reducing energy consumption; the multiple partitions 11 of the furnace body 1 can be opened and closed in sections by setting the gate mechanism, so as to avoid the large loss of gas and heat in the product channel caused by multiple partitions 11 being in an open state at the same time; at least one of the inlet gate 31 and the outlet gate is set to a closed state, and when the inlet gate 31 (or the outlet gate) is opened, the intermediate gate 32 closest to the inlet gate 31 (or the outlet gate) is closed, so that the product channel between the outlet gate (or the inlet gate) in the closed state and the intermediate gate 32 closest to the inlet gate 31 (or the outlet gate) is closed, thereby effectively avoiding the large loss of inert gas and heat in the product channel.
[0022] Under actual working conditions, multiple products will be transmitted in the furnace body 1 at the same time, and multiple products will enter the furnace body 1 at set time intervals. At this time, the opening or closing time of the intermediate gate 32, the entrance gate 31, and the exit gate can be set according to the time when the multiple products enter the furnace body 1, so as to reduce the loss of inert gas and heat while ensuring the smooth transmission of multiple products.
[0023] In some embodiments, see Appendix Figure 4-5As shown, the entrance gate 31, the exit gate, and the intermediate gate have the same structure, and all include a door panel 311, a guide column 312, and a lifting drive member (not shown in the figure). The guide column 312 is installed on the top of the furnace body 1. The door panel 311 vertically penetrates the top of the furnace body 1 and can be lifted and moved along the guide column 312 under the action of the lifting drive member. The guide column 312 can guide the moving direction of the door panel 311, so that the door panel 311 can be lifted and opened and closed in the vertical direction.
[0024] Furthermore, in order to ensure the consistency of the opening and closing positions of the door panel 311, in some embodiments, the top of the furnace body 1 is also provided with detection members (such as sensors) corresponding to the entrance gate 31, the exit gate, and the intermediate gate 32, and the upper end of the door panel 311 is provided with an in-place detection piece 313 for detection by the detection member; when the detection member detects the in-place detection piece 313, the door panel 311 moves to the closed state, the lifting drive member stops running, and the door panel 311 is kept in the closed state. Furthermore, the upper end of the guide column 312 is provided with a stop block for the door panel 311 to abut against, so as to limit the upward movement position of the door panel 311.
[0025] In the process of lifting and lowering the door panel 311, in order to reduce the movement resistance of the door panel 311, a gap is usually left between the door panel 311 and the inner side wall of the furnace body 1, which results in that when the door panel 311 is in a closed state, the inert gas may escape from the gap between the door panel 311 and the inner side wall of the furnace body 1. Therefore, in some embodiments, the junction of two adjacent partitions 11 is provided with a side baffle 12 arranged on the two inner side walls of the furnace body 1, and the side baffle 12 and the door panel 311 between the corresponding two adjacent partitions 11 are staggered along the product transmission direction, and when the door panel 311 between the two partitions 11 is in a closed state, the side baffle 12 and the door panel 311 can partially overlap in the product transmission direction. In this way, the escape of the inert gas can be suppressed by the stopper of the side baffle 12, so as to minimize the escape amount of the inert gas.
[0026] Furthermore, the side baffle 12 is gradually inclined from the direction close to the inner wall of the furnace body 1 to the direction away from the inner wall of the furnace body 1 and toward the direction close to the door panel 311 , so as to reduce the gap between the side baffle 12 and the door panel 311 as much as possible.
[0027] In some embodiments, a through-beam sensor is provided in the partition 11 to detect the product. When the through-beam sensor detects the product, the product is completely located in the partition 11. The through-beam sensor can detect the position of the product in the partition 11, thereby facilitating the control of the opening and closing of the door panels 311 at both ends of the partition 11.
[0028] Exemplarily, the door panels 311 at both ends of the partition area 11 are respectively the first door panel and the second door panel, and the first door panel is closer to the product entrance. In the initial state, the first door panel is in an open state, and the product can enter the partition area 11 and enter the detection area of the through-beam sensor. At this time, the product has completely entered the partition area 11, and the first door panel can be controlled to close; as the product continues to be transmitted, the product will leave the detection area of the through-beam sensor, and at this time, the second door panel can be controlled to open.
[0029] In some embodiments, the oxygen content of the separation zone 11 is greater than 500 ppm, the nitrogen content is less than 99.95%, and the temperature of the separation zone is not less than 60°C.
[0030] In some embodiments, see Appendix Figure 1 As shown, five partitions 11 are sequentially arranged on the furnace body 1, and along the product transmission direction, the five partitions 11 are sequentially an isolation zone 111, a preheating waiting zone 112, a constant temperature zone 113, a heat preservation isolation zone 114 and a cooling zone 115. Among them, the isolation zone 111 is used to isolate the product from the external environment; the preheating waiting zone 112 is used to preheat the product and wait for it to enter the constant temperature zone 113; the constant temperature zone 113 is used to perform a constant temperature heat treatment on the product, and inert gas (such as nitrogen) is used as a heating medium during the heat treatment process, and the temperature of the constant temperature zone 113 is controlled at about 450°C; the heat preservation isolation zone 114 is used to isolate and heat the product; and the cooling zone 115 is used to cool the product.
[0031] Since waste gas is generated during the heat treatment process, in some embodiments, a waste outlet 1111 connected to the product channel is provided at the top of the isolation zone 111. When the intermediate gate 32 is opened, the waste gas in the constant temperature zone 113 can be discharged through the waste outlet 1111 along the product channel.
[0032] In some embodiments, a heating module for heating the product channel is provided in the preheating waiting area 112 and the constant temperature area 113. The heating module is a single-cycle heating module or a double-cycle heating module. The setting of the heating module can heat and dry the products in the product channel.
[0033] The single-circulation heating module is a heating chamber 41 with a single built-in heating element disposed on one side of the furnace body 1, and the circulation of airflow between the heating chamber 41 and the product channel is realized by a circulation fan 42. The double-circulation heating module is a heating chamber 41 with built-in heating elements disposed on both sides of the furnace body 1, and each heating chamber 41 is used to realize the circulation of airflow between the heating chamber 41 and the product channel through an independent circulation fan 42.
[0034] Furthermore, the constant temperature zone 113 includes a plurality of temperature sections with different temperatures, and a temperature zone gate is provided between the two temperature zones closest to the preheating waiting zone 112, and the temperature zone gate structure is the same as the structure of the intermediate gate 32. When the intermediate gate 32 between the constant temperature zone 113 and the preheating waiting zone 112 is in an open state, the temperature zone gate is in a closed state. Since the inert gas and the hot air flow are mainly concentrated in the constant temperature zone 113, the stability of the temperature and gas concentration of the constant temperature zone 113 can be further ensured by the additional temperature zone gate.
[0035] In some embodiments, see Appendix Figure 3 As shown, the furnace body 1 includes a pair of convection panels arranged opposite to each other, a top cover 13 is provided on the top of the pair of convection panels, and a product channel is provided on the bottom of the pair of convection panels; and an air curtain 5 is installed at one end of one convection panel close to the product inlet. The air curtain 5 can distinguish the environment in the product channel from the external environment.
[0036] Usually, products are placed on carriers for transportation. When the carriers carrying products are transported to the product outlet, the products will enter the next process, while the empty carriers will remain on the transport mechanism 2. In order to recycle or temporarily store the empty carriers, in some embodiments, a carrier reflux mechanism 6 is provided below the furnace body 1, and a carrier lifting mechanism is provided between the transport mechanism 2 near the product inlet and the carrier reflux mechanism 6. The carrier at the product outlet can be refluxed to the product inlet through the carrier reflux mechanism 6, and then the carrier on the carrier reflux mechanism 6 can be lifted to the transport mechanism 2 by the carrier lifting mechanism to facilitate loading the next product.
[0037] Since the transmission mechanism 2 is mostly chain-type transmission, metal dust will be generated during the continuous transmission and friction of the chain. This dust may fall onto the carrier of the carrier reflux mechanism 6, and may contaminate the product when the carrier is loaded with the product again. Based on this, in some embodiments, a dust collecting mechanism 7 installed on the furnace body 1 is also provided below the transmission mechanism 2. The dust collecting mechanism 7 includes a dust box with an open upper end, which extends along the product transmission direction, and the width of the dust box is greater than the width of the transmission mechanism 2. The dust collecting mechanism 7 can collect dust falling from the conveying mechanism to reduce the risk of battery cell contamination.
[0038] In some embodiments, see Appendix Figure 5 As shown, the transmission assembly 21 includes an active roller 212 and a driven roller installed on a transmission frame 211. Two closed-loop chains arranged side by side are wound around the active roller 212 and the driven roller. A plurality of carrier plates 213 for carrying carriers are evenly distributed between the two closed-loop chains along the product transmission direction. A transmission drive member (such as a motor) connected to the active roller 212 is provided on the transmission frame 211.
[0039] At the product entrance, because the transmission component 21 is a runway-shaped closed-loop structure formed by a closed-loop chain and a support plate 213, the product entrance is at the end of the runway-shaped closed-loop structure with a large curvature, which may easily cause unstable placement of the carrier. Therefore, in some embodiments, a transfer roller group 8 for carrying the carrier is provided on the transmission frame 211 near the product entrance, and the transfer roller group 8 includes at least two transfer rollers, and the upper end surfaces of all the transfer rollers are located on the same plane, and the upper end surface of the transfer roller closest to the product entrance is flush with the end surface of the transmission component 21 carrying the carrier.
[0040] In addition, in order to ensure stable transmission of the carrier between two adjacent transmission components 21, the distance between two adjacent transmission components 21 can be set to be smaller than the size of the carrier along the product transmission direction. Alternatively, a connecting roller set 8 can be added between the two transmission components according to actual conditions.
[0041] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.
Claims
1. A multi-stage transmission curing furnace, characterized in that: include A furnace body, one end of which is a product inlet and the other end of which is a product outlet; the furnace body is provided with at least three partitions in sequence along the product transmission direction, and all the partitions together form a product channel connecting the product inlet and the product outlet; A transmission mechanism, the transmission mechanism comprising transmission components which are arranged in a one-to-one correspondence in the partition area and can operate independently, and the transmission components are used to transmit products in the product channel; A gate mechanism, the gate mechanism comprising an entrance gate, an exit gate and an intermediate gate which can be opened and closed independently to separate or connect the product channel, the entrance gate and the exit gate are respectively located at the product entrance and the product exit, and the intermediate gate is arranged one by one between two adjacent partitions; At least one of the entrance gate and the exit gate is in a closed state, and when the exit gate is in an open state, the intermediate gate closest to the exit gate is in a closed state; when the entrance gate is in an open state, the intermediate gate closest to the entrance gate is in a closed state.
2. The multi-stage transmission curing oven according to claim 1, characterized in that: The entrance gate, the exit gate and the intermediate gate all include door panels, guide columns and lifting drive members. The guide columns are installed on the top of the furnace body. The door panels vertically penetrate the top of the furnace body and can be lifted and moved along the guide columns under the action of the lifting drive member.
3. The multi-stage transmission curing oven according to claim 2, characterized in that: The top of the furnace body is also provided with detection parts which are arranged one by one corresponding to the entrance gate, the exit gate and the intermediate gate, and the upper end of the door panel is provided with an in-place detection piece for detection by the detection parts; when the detection part detects the in-place detection piece, the door panel is in a closed state.
4. The multi-stage transmission curing oven according to claim 2, characterized in that: The upper end of the guide column is provided with a stop block for the door panel to abut against.
5. The multi-stage transmission curing oven according to claim 2, characterized in that: The junction of two adjacent partitions is provided with side baffles arranged on the two inner side walls of the furnace body. When the door panel between the two partitions is in a closed state, the side baffles and the door panel can partially overlap in projection along the product transmission direction.
6. The multi-stage transmission curing oven according to claim 1, characterized in that: Five separation zones are arranged on the furnace body in sequence. Along the product transmission direction, the five separation zones are the isolation zone, the preheating waiting zone, the constant temperature zone, the heat preservation isolation zone and the cooling zone in sequence. A waste outlet connected to the product channel is arranged on the top of the isolation zone.
7. The multi-stage transmission curing oven according to claim 6, characterized in that: The preheating waiting area and the constant temperature area are both provided with a heating module for heating the product channel, and the heating module is a single-circulation heating module or a double-circulation heating module.
8. The multi-stage transmission curing oven according to claim 1, characterized in that: The furnace body comprises a pair of convection panels arranged opposite to each other, a top cover is commonly provided on the top of the pair of convection panels, and the product channel is commonly provided on the bottom of the pair of convection panels; and an air curtain is installed at one end of one of the convection panels close to the product inlet.
9. The multi-stage transmission curing oven according to claim 1, characterized in that: A dust collecting mechanism installed on the furnace body is also provided below the transmission mechanism. The dust collecting mechanism includes a dust box with an open upper end. The dust box extends along the product transmission direction, and the width of the dust box is greater than the width of the transmission mechanism.
10. The multi-stage transmission curing oven according to claim 1, characterized in that: A carrier reflux mechanism is provided below the furnace body, and a carrier lifting mechanism is provided between the transmission mechanism near the product inlet and the carrier reflux mechanism.