Coating oven

Abstract

The utility model relates to the technical field of lithium battery coating pole piece drying, and discloses a coating drying oven which comprises an oven body, an upper ship body, a lower ship body and a plurality of air knives. The box body is provided with a feeding hole and a discharging hole, and the feeding hole and the discharging hole are positioned between the upper ship body and the lower ship body, so that the coated pole piece is conveyed into the box body from the feeding hole, passes through the space between the upper ship body and the lower ship body and is conveyed out from the discharging hole; the multiple air knives are installed on the upper ship body and the lower ship body respectively, the infrared heating plates are arranged on the air knives, so that the infrared heating plates are distributed on the upper ship body and the lower ship body, heat is radiated through the infrared heating plates, coated pole pieces of lithium batteries are directly baked, and the problem of heat transfer loss caused by indirect baking of the coated pole pieces through heated air is solved; energy loss is reduced, and the resource utilization rate is increased.

Description

Technical Field

[0001] The present application relates to the technical field of drying coated pole pieces of lithium batteries, and in particular to a coating oven. Background Art

[0002] In the manufacturing process of lithium batteries, the coated pole pieces need to be dried; the oven currently used for drying the coated pole pieces adopts a hot air drying device, which delivers an air flow heated by an external heat source and blows it toward the coated pole pieces to bake the coated pole pieces; the external heat source first heats the air flow, and then bakes the coated pole pieces with the heated air flow, and the heat is lost in the two intermediate transfer processes, resulting in energy waste. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a coating oven, which aims to solve the technical problem of energy waste caused by using hot air to bake the coated rear electrode.

[0004] To achieve the above-mentioned purpose, the present application proposes a coating oven for baking coated pole pieces, the coating oven comprising:

[0005] A box body, wherein the box body is provided with a feed inlet and a discharge outlet;

[0006] An upper hull and a lower hull, wherein the upper hull and the lower hull are spaced apart and distributed in the box body along the height direction; the feed inlet and the discharge port are located between the upper hull and the lower hull; the upper hull and the lower hull are both provided with air inlets, and the upper hull and the lower hull are both provided with a plurality of air outlets on opposite sides;

[0007] A plurality of wind knives, wherein the plurality of wind knives are respectively installed on the upper hull and the lower hull; the wind knives correspond to the air outlets one by one, and the wind knife covers are arranged on the air outlets;

[0008] Wherein, the wind knife comprises:

[0009] An installation body, wherein an air inlet is provided at the bottom end of the installation body, and the air inlet is connected to the air outlet; air outlets are provided at both sides of the top end of the installation body, and the air inlet is connected to the two air outlets;

[0010] An infrared heating plate is installed on the installation body and is located between the two air outlets; the side of the infrared heating plate facing away from the installation body is a heating surface.

[0011] Optionally, the multiple air outlets of the upper hull and the multiple air outlets of the lower hull are distributed alternately.

[0012] Optionally, the wind knife comprises:

[0013] One or more infrared heating panels;

[0014] Wherein, the plurality of infrared heating panels are arranged successively along a direction perpendicular to a line connecting the two air outlets.

[0015] Optionally, the bottom surface of the infrared heating plate is a power connection terminal; the wind knife further comprises:

[0016] A power connection component is installed on the installation body and is located on the bottom surface of the infrared heating plate; the power connection component is used for external power supply; the power connection component is provided with a conductive spring sheet with one end extending outward, and the end of the conductive spring sheet extending outward elastically abuts against and is electrically connected to the power connection end.

[0017] Optionally, the power connection component includes:

[0018] Two power connection bars, each of which is provided with a plurality of conductive springs;

[0019] The two power connection bars are respectively located on both sides of the infrared heating plate close to the two air outlets; the two power connection bars are elastically pressed against and electrically connected to the power connection ends on both sides of the bottom surface of the infrared heating plate through the conductive spring sheets.

[0020] Optionally, the coating oven further comprises:

[0021] A height adjustment mechanism is installed on the box body and connected to the upper hull and / or the lower hull, and is used to adjust the height of the upper hull and / or the lower hull.

[0022] Optionally, the height adjustment mechanism comprises:

[0023] At least four lifting screws and at least four screw nuts, wherein the at least four screw nuts are installed on the surrounding areas of the upper hull and / or the lower hull, and the lifting screws are cooperatively connected to the screw nuts; one end of the lifting screw protrudes from the box body;

[0024] A rotating adjustment rod and at least four driving rods, one end of the at least four driving rods is respectively engaged through bevel gears to drive the rotating adjustment rod, and the other end of the at least four driving rods is respectively engaged through bevel gears to drive one end of the at least four lifting screws protruding from the box body; the driving rods correspond to the lifting screws one by one.

[0025] Optionally, the coating oven further comprises:

[0026] A roller is installed in the box and located between the upper hull and the lower hull; the roller is used to support the coated electrode.

[0027] Optionally, the box body is provided with a plurality of air outlets, and the plurality of air outlets are all located between the upper hull and the lower hull; and / or,

[0028] The box body is provided with two air supply ports, and the two air supply ports are respectively connected to the air inlet of the upper hull and the air inlet of the lower hull.

[0029] Optionally, the box body is provided with an explosion-proof valve port; and / or,

[0030] The box body is provided with a maintenance and installation window.

[0031] The present application provides a coating oven, which includes a box body, an upper hull, a lower hull and multiple air knives; the box body is provided with a feed port and a discharge port, and the feed port and the discharge port are located between the upper hull and the lower hull, so that the coated electrode is transported into the box body from the feed port, and transported through the upper hull and the lower hull, and transported out from the discharge port; multiple air knives are respectively installed on the upper hull and the lower hull, and infrared heating plates are provided on the wind knives, so that the upper hull and the lower hull are both distributed with infrared heating plates, and the heat is radiated by the infrared heating plates to directly bake the coated electrode of the lithium battery, thereby avoiding the problem of heat transfer loss caused by indirect baking of the coated electrode by heated air, reducing energy loss, and helping to improve resource utilization.

[0032] Air outlet nozzles are respectively provided on both sides of the top of the installation body. The air blowing nozzles are slit-shaped and face the coated electrode. An air inlet is provided at the bottom end of the installation body. The installation body cover is arranged on the air outlet so that the air outlet is connected with the air inlet. The air inlet is connected with the two air outlet nozzles so that the air flow enters the installation body from the air inlet and flows out from the air outlet to blow toward the coated electrode to disperse the solvent and moisture on the coated electrode and improve the baking efficiency. The wind force acts on the coated electrode to form a suspension effect on the coated electrode.

[0033] The infrared heating plate is used to directly heat the coated electrode, eliminating the structure of the mixed wind chamber channel for heating the air flow, which is beneficial to reduce space occupancy and reduce manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0035] Figure 1 A schematic diagram of the three-dimensional structure of a coating oven provided in this application;

[0036] Figure 2 A schematic diagram of the three-dimensional structure of the coating oven provided in this application from another perspective;

[0037] Figure 3 A schematic diagram of a three-dimensional structure of a coating oven provided in this application;

[0038] Figure 4 A schematic top view of a coating oven provided in this application;

[0039] Figure 5 This application Figure 4 A schematic cross-sectional view along the Ⅰ-Ⅰ direction;

[0040] Figure 6 A schematic diagram of the three-dimensional structure of the connection structure between the lower hull and the air knife in the coating oven provided in the present application;

[0041] Figure 7 A schematic diagram of the three-dimensional structure of the air knife in the coating oven provided in this application;

[0042] Figure 8 A schematic top view of an air knife in a coating oven provided in the present application;

[0043] Fig. 9 A right side schematic diagram of an air knife in a coating oven provided in the present application;

[0044] Fig.10 A schematic diagram of the front view of the air knife in the coating oven provided in the present application;

[0045] Fig.11 This application Fig.10 Schematic diagram of the cross section along the II-II direction;

[0046] Fig.12 A schematic diagram of the connection structure between the power connection assembly and the infrared heating plate provided in this application;

[0047] Fig.13 A cross-sectional schematic diagram of the connection structure between the power connection assembly and the infrared heating plate provided in the present application;

[0048] Fig.14 For this application Fig.13 Enlarged schematic diagram of part A in the middle.

[0049] Description of Figure Numbers:

[0050] 10. Coating oven;

[0051] 11. Box body;

[0052] 111. Feed inlet; 112. Discharge outlet; 113. Exhaust outlet; 114. Air supply outlet; 115. Explosion-proof valve outlet; 116. Maintenance and installation window;

[0053] 12. Upper hull; 13. Lower hull;

[0054] 14. Wind knife;

[0055] 141. Install the main body;

[0056] 1411, air inlet; 1412, air outlet;

[0057] 142. Infrared heating plate;

[0058] 1421, heating surface; 1422, power connection terminal;

[0059] 143. Power connection assembly;

[0060] 1431, conductive spring; 1432, connecting strip; 1433, high temperature wiring; 1434, silver-plated bump;

[0061] 15. Air inlet; 16. Air outlet;

[0062] 17. Height adjustment mechanism;

[0063] 171. lifting screw; 172. screw nut; 173. rotating adjustment rod; 174. driving rod;

[0064] 18. Roller passing; 20. Coating the pole piece. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0066] The present application aims to solve the technical problem of energy waste caused by indirect baking of coated electrodes by heated air flow, and provides a coating oven, which includes a box body, an upper hull, a lower hull and multiple wind knives; the box body is provided with a feed port and a discharge port, and the feed port and the discharge port are located between the upper hull and the lower hull, so that the coated electrode is transported into the box body from the feed port, and transported through the upper hull and the lower hull, and transported out from the discharge port; multiple wind knives are respectively installed on the upper hull and the lower hull, and infrared heating plates are provided on the wind knives, so that the upper hull and the lower hull are both distributed with infrared heating plates, and heat is radiated by the infrared heating plates to directly bake the coated electrode of the lithium battery, thereby avoiding the problem of heat transfer loss caused by indirect baking of the coated electrode by heated air, reducing energy loss, and being conducive to improving resource utilization; please refer to the following embodiments for details.

[0067] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 In the first embodiment of the present application, a coating oven 10 is provided for baking a coated electrode 20, wherein the coating oven 10 comprises a box body 11, an upper hull 12, a lower hull 13 and a plurality of air knives 14; the box body 11 is provided with a feed port 111 and a discharge port 112; the upper hull 12 and the lower hull 13 are spaced apart in the box body 11 along the height direction; the feed port 111 and the discharge port 112 are located between the upper hull 12 and the lower hull 13; the upper hull 12 and the lower hull 13 are both provided with an air inlet 15, and the upper hull 12 and the lower hull 13 are both provided with a plurality of air outlets 16 on opposite sides; the plurality of air knives 14 are respectively installed at The upper hull 12 and the lower hull 13; the wind knife 14 corresponds to the air outlet 16 one by one, and the wind knife 14 is covered on the air outlet 16; wherein the wind knife 14 includes a mounting body 141 and an infrared heating plate 142; an air inlet 1411 is provided at the bottom end of the mounting body 141, and the air inlet 1411 is connected to the air outlet 16; air outlet nozzles 1412 are respectively provided on both sides of the top end of the mounting body 141, and the air inlet 1411 is connected to the two air outlet nozzles 1412; the infrared heating plate 142 is mounted on the mounting body 141, and is located between the two air outlet nozzles 1412; the top surface of the infrared heating plate 142 is a heating surface 1421.

[0068] It can be understood that the coating oven 10 provided in the present application is used for baking the coated electrode 20; the coating oven 10 includes a box body 11, an upper hull 12, a lower hull 13 and a plurality of air knives 14; the box body 11 is provided with a feed port 111 and a discharge port 112, and the feed port 111 and the discharge port 112 are located between the upper hull 12 and the lower hull 13, so that the electrode after coating is transported from the feed port 111 into the box body 11, and transported through the lower hull 13 and the lower hull 13, from The material is transported out through the discharge port 112; a plurality of wind knives 14 are respectively installed on the upper hull 12 and the lower hull 13, and an infrared heating plate 142 is provided on the wind knife 14, so that the upper hull 12 and the lower hull 13 are both distributed with the infrared heating plates 142. Heat is radiated by the infrared heating plates 142 to directly bake the coated pole pieces of the lithium battery, thereby avoiding the problem of heat transfer loss caused by indirect baking of the coated pole pieces 20 by heated air, reducing energy loss, and being conducive to improving resource utilization.

[0069] The upper hull 12 and the lower hull 13 are spaced apart in the box body 11 along the height direction. Specifically, the upper hull 12 is located above the lower hull 13. A gap is formed between the upper hull 12 and the lower hull 13 for conveying the coated electrode 20. The upper hull 12 and the lower hull 13 are both provided with an air inlet 15, which is used to connect an external air supply pipeline for air flow to enter the upper hull 12 and the lower hull 13. The upper hull 12 and the lower hull 13 are provided with a plurality of air outlets 16 on opposite sides, that is, the bottom surface of the upper hull 12 is provided with a plurality of air outlets 16, and the top surface of the upper hull 12 is provided with a plurality of air outlets 16, and the air flows out from the air outlets 16; the wind knives 14 correspond to the air outlets 16 one by one, and the wind knives 14 are covered by the air outlets 16, so that the plurality of wind knives 14 are distributed on the upper hull 12 and the lower hull 13, so as to realize direct baking of the top and bottom surfaces of the coated electrode 20, thereby improving the baking efficiency.

[0070] The wind knife 14 is also provided with a mounting body 141, which is mounted on the coating oven 10 and used to fix the infrared heating plate 142. Specifically, a mounting groove is provided on the top surface of the mounting body 141, and the infrared heating plate 142 is fixed in the mounting groove. Air outlet nozzles 1412 are respectively provided on both sides of the top of the installation body 141. The air outlet nozzles are slit-shaped and the air outlet nozzles 1412 face the coated electrode 20. An air inlet 1411 is provided at the bottom of the installation body 141. The installation body 141 is covered on the air outlet 16 so that the air outlet 16 is connected to the air inlet 1411; the air inlet 1411 is connected to the two air outlet nozzles 1412, so that the air flow enters the installation body 141 from the air inlet 1411 and flows out from the air outlet nozzle 1412 and blows toward the coated electrode 20 to blow away the solvent and moisture on the coated electrode 20 and improve the baking efficiency; the wind force acts on the coated electrode 20 to form a suspension effect on the coated electrode 20. The side of the infrared heating plate 142 facing away from the installation body 141 is a heating surface 1421, that is, the top surface of the infrared heating plate 142 located on the lower hull 13 is the heating surface 1421, and the bottom surface of the infrared heating plate 142 located on the upper hull 12 is the heating surface 1421. When the wind knife 14 bakes the coated electrode 20, the heating surface 1421 faces the coated electrode 20; the wind knife 14 is provided with an air outlet 1412 and an infrared heating plate 142 at the same time, and the infrared heating plate 142 is located between the two air outlets 1412, and the airflow blown out by the air outlet 1412 has a heat transfer effect on the infrared heating plate 14 2 The diffusion effect of radiant heat is conducive to uniform and rapid diffusion of heat, promotes rapid drying of the coated electrode 20, and improves baking efficiency; the air outlet nozzle 1412 can be at a certain inclination angle relative to the coated electrode 20, and the two air outlet nozzles 1412 are symmetrically distributed relative to the coated electrode 20, and the two air outlet nozzles 1412 are inclined to the middle position, so that the airflow blown out by the two air outlet nozzles 1412 acts evenly on the coated electrode 20, which is conducive to maintaining the stability of the coated electrode 20, avoiding the coated electrode 20 from deviating from the infrared heating plate 142, and thus ensuring the baking effect of the infrared heating plate 142.

[0071] The existing coating oven needs to be provided with structures such as a mixed wind chamber channel for heating the air flow, which makes the overall structural width of the coating oven relatively large. The coating oven 10 provided in the present application uses an infrared heating plate 142 to directly heat the coating electrode 20, eliminating structures such as a mixed wind chamber channel for heating the air flow, which is beneficial to reducing space occupancy and reducing manufacturing costs.

[0072] The traditional wind knife only has the function of blowing and suspending. The wind knife 14 provided in this application integrates the functions of blowing and suspending and infrared heating. No additional installation space for the infrared heating plate 142 is required, which is conducive to reducing the cost of equipment materials and reducing space occupancy. The infrared heating plate 142 generates infrared rays after being powered on, radiates heat, and bakes the coated electrode 20; infrared radiation is divided into three bands: near (short wave) infrared radiation (wavelength ≤ 2μm), medium (medium wave) infrared radiation (wavelength 2μm ~ 4μm) and far (long wave) infrared radiation (wavelength> 4μm), which can be selected according to actual needs.

[0073] Please continue to refer to Figure 3 , Figure 4 and Figure 5 In some embodiments, the plurality of air outlets 16 of the upper hull 12 and the plurality of air outlets 16 of the lower hull 13 are staggeredly distributed.

[0074] It can be understood that the multiple air outlets 16 of the upper hull 12 and the multiple air outlets 16 of the lower hull 13 are staggered, the wind knives 14 correspond to the air outlets 16 one by one, and the wind knives 14 are covered on the air outlets 16, so that the multiple wind knives 14 are staggered on the upper hull 12 and the lower hull 13. The air flow flows out from the air outlet 1412 and blows toward the coated electrode 20, so that the coated electrode 20 forms a wave motion when passing through the multiple staggered wind knives 14, which helps to blow away the solvent and moisture on the coated electrode 20 and improve the baking efficiency.

[0075] Please continue to refer to Figure 1 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the coating oven 10 further includes a height adjustment mechanism 17, which is installed on the box body 11 and connected to the upper hull 12 and / or the lower hull 13, and is used to adjust the height of the upper hull 12 and / or the lower hull 13.

[0076] It can be understood that the height adjustment mechanism 17 is installed on the box body 11, connected to the upper hull 12 and / or the lower hull 13, so as to realize the height adjustment of the upper hull 12 and / or the lower hull 13, and then realize the adjustment of the distance between the upper hull 12 and the lower hull 13, and adjust the distance between the infrared heating plate 142 distributed on the upper hull 12 and / or the infrared heating plate 142 distributed on the lower hull 13 and the coating electrode 20, so that the infrared heating plate 142 maintains a better distance from the coating electrode 20, thereby ensuring the baking effect of the infrared heating plate 142 on the coating electrode 20, which helps to improve the drying efficiency of the coating electrode 20. Specifically, the height adjustment mechanism 17 is only connected to the upper hull 12 or the lower hull 13, and raises and lowers the height of the upper hull 12 or the lower hull 13 to adjust the distance between the upper hull 12 and the lower hull 13; or, the height adjustment mechanism 17 is connected to the upper hull 12 and the lower hull 13 at the same time, and drives the upper hull 12 and the lower hull 13 to approach or move away from each other, so as to adjust the distance between the upper hull 12 and the lower hull 13.

[0077] Please continue to refer to Figure 1 , Figure 3 , Figure 4 and Figure 5 In some embodiments, the height adjustment mechanism 17 includes at least four lifting screws 171, at least four screw nuts 172, a rotation adjustment rod 173 and at least four driving rods 174; the at least four screw nuts 172 are installed in the surrounding areas of the upper hull 12 and / or the lower hull 13, and the lifting screw 171 is cooperatively connected to the screw nut 172; one end of the lifting screw 171 protrudes from the box body 11; one end of the at least four driving rods 174 is respectively engaged with the rotation adjustment rod 173 through bevel gears, and the other end of the at least four driving rods 174 is respectively engaged with the at least four lifting screws 171 through bevel gears to drive one end of the protruding box body 11; the driving rods 174 correspond one to one with the lifting screws 171.

[0078] It can be understood that the screw nut 172 is connected with the lifting screw 171, and the screw nut 172 moves up and down along the lifting screw 171 when the lifting screw 171 rotates, so as to realize the conversion between linear motion and rotational motion. At least four screw nuts 172 are installed in the surrounding areas of the upper hull 12 or the lower hull 13, that is, at least four screw nuts 172 are respectively installed in the surrounding areas of the upper hull 12 or the surrounding areas of the lower hull 13, and the lifting screw 171 is connected with the screw nut 172, so that the upper hull 12 or the lower hull 13 moves up and down along the lifting screw 171; at least four screw nuts 172 are installed in the surrounding areas of the upper hull 12 and the lower hull 13, that is, at least four screw nuts 172 are respectively installed in the surrounding areas of the upper hull 12 and at least four screws. The nuts 172 are respectively installed in the surrounding areas of the lower hull 13, and the same lifting screw 171 cooperates with the screw nuts 172 on the upper hull 12 and the screw nuts 172 on the lower hull 13, so that the upper hull 12 and the lower hull 13 move up and down along the lifting screw 171; the two ends of the lifting screw 171 can be set to rotate in opposite directions, so that the screw nuts 172 cooperated and connected at the two ends of the lifting screw 171 move closer to or away from each other when the lifting screw 171 rotates, so as to realize the upper hull 12 and the lower hull 13 moving closer to or away from each other, and realize the spacing adjustment. One end of the lifting screw 171 protrudes from the box body 11 and is used to connect the driving rod 174. The number of driving rods 174 is the same as the number of lifting screws 171, and they correspond one to one. One lifting screw 171 is connected to one driving rod 174; the driving rod 174 and the end of the lifting screw 171 protruding from the box body 11 are driven by bevel gear meshing. The bevel gear meshing can adjust the transmission direction so that the driving rod 174 is perpendicular to the lifting screw 171. Since the lifting screw 171 is used to adjust the height, the lifting screw 171 extends in the height direction, so that the driving rod 174 extends in the horizontal direction, which is convenient for installing the driving rod 174 on the top surface of the box body 11, which is beneficial to reducing the space occupied by the driving rod 174. The rotating adjustment rod 173 transmits the end of all the driving rods 174 away from the lifting screw 171 through the bevel gear meshing, so that the same rotating adjustment rod 173 drives all the driving rods 174 to rotate, and then the same rotating adjustment rod 173 drives and adjusts all the lifting screws 171, effectively reducing the convenience of height adjustment of the upper hull 12 and / or the lower hull 13, and facilitating manual operation.

[0079] Please continue reading Figure 3 In some embodiments, the coating oven 10 further includes a roller 18 , which is installed in the box body 11 and located between the upper hull 12 and the lower hull 13 ; the roller 18 is used to support the coating electrode 20 .

[0080] It can be understood that the roller 18 is rotatable, and when the coated electrode piece 20 is transported through between the upper hull 12 and the lower hull 13 , it supports the coated electrode piece 20 and reduces the resistance during the transport of the coated electrode piece 20 .

[0081] Please continue reading Figure 2 In some embodiments, the box body 11 is provided with a plurality of exhaust ports 113 , and the plurality of exhaust ports 113 are all located between the upper hull 12 and the lower hull 13 .

[0082] It can be understood that the air flow flows out from the air outlet 1412 and blows toward the coated electrode 20, blowing away the solvent and moisture on the coated electrode 20. Multiple exhaust ports 113 are located between the upper hull 12 and the lower hull 13 to facilitate the discharge of the dispersed solvent and moisture, promote the circulation of the air flow, and help improve the drying efficiency of the coated electrode 20.

[0083] Please continue to refer to Figure 2 and Figure 6 In some embodiments, the box body 11 is provided with two air supply ports 114 , and the two air supply ports 114 are connected to the air inlet 15 of the upper hull 12 and the air inlet 15 of the lower hull 13 respectively.

[0084] It can be understood that two air supply ports 114 are respectively arranged on the box body 11, and the two air supply ports 114 are respectively used to supply air to the air inlet 15 of the upper hull 12 and the lower hull 13; using two separate air supply ports 114 makes it easy to separately adjust the air inlet size of the upper hull 12 and the air inlet size of the lower hull 13, thereby improving the convenience of use.

[0085] Please continue reading Figure 1 In some embodiments, the box body 11 is provided with an explosion-proof valve port 115 .

[0086] It can be understood that the explosion-proof valve port 115 can be used to install an explosion-proof valve to prevent the risk of explosion caused by excessive concentration of solvent blown out of the box body 11 , thereby improving the safety of the coating oven 10 .

[0087] Please continue reading Figure 1 In some embodiments, the housing 11 is provided with a maintenance installation window 116 .

[0088] It can be understood that maintenance personnel can install, repair or replace structures such as the wind knife 14, the upper hull 12, and the lower hull 13 in the box body 11 through the maintenance and installation window 116, thereby improving the convenience of use.

[0089] Please continue to refer to Fig.10 and Fig.11In some embodiments, the bottom surface of the infrared heating plate 142 is a power terminal 1422; the wind knife 14 also includes a power connection component 143, which is installed on the installation body 141 and is located on the bottom surface of the infrared heating plate 142; the power connection component 143 is used for external power supply; the power connection component 143 is provided with a conductive spring sheet 1431 with one end extending outward, and the end of the conductive spring sheet 1431 extending outward elastically abuts against and is electrically connected to the power terminal 1422.

[0090] It can be understood that the power connection component 143 is installed on the installation body 141 and is located on the bottom surface of the infrared heating plate 142, and has a supporting and fixing function for the infrared heating plate 142; the bottom surface of the infrared heating plate 142 is provided with a power connection terminal 1422 for powering on; the power connection component 143 is provided with a conductive spring 1431, one end of the conductive spring 1431 extends outward away from the conductive component, and is inclined relative to the top surface of the power connection component 143, so that the conductive spring 1431 is elastic, and the other end of the conductive spring 1431 is connected to the conductive component; when the infrared heating plate 142 is placed on the power connection component 143, the conductive spring 1431 elastically abuts against the power connection terminal 1422 on the bottom surface of the infrared heating plate 142 The power connection component 143 is connected to the power connection terminal 1422, and the conductive spring piece 1431 is electrically connected to the power connection terminal 1422, so as to realize power supply to the infrared heating plate 142 and ensure the baking effect of the infrared heating plate 142 on the coated electrode 20; at the same time, the infrared heating plate 142 can be powered by only placing the infrared heating plate 142 on the power connection component 143, which is also convenient for the installation of the infrared heating plate 142; the power connection component 143 elastically abuts against the power connection terminal 1422 of the infrared heating plate 142 through the conductive spring piece 1431, which is beneficial to ensure the reliability of the electrical connection between the infrared heating plate 142 and the power connection component 143 and the structural stability of the infrared heating plate 142 on the installation body 141.

[0091] The present application does not limit the number of infrared heating plates 142 and conductive springs 1431. Multiple infrared heating plates 142 and conductive springs 1431 can be provided, so that multiple infrared heating plates 142 can be electrically connected through multiple conductive springs 1431 of the power connection component 143, so that multiple infrared heating plates 142 can be powered by the same power supply, reducing wiring and lowering the difficulty of assembly.

[0092] Please continue reading Figure 6 and Figure 7 In some embodiments, the wind knife 14 includes one or more infrared heating plates 142 ; wherein the plurality of infrared heating plates 142 are arranged successively along a direction perpendicular to a line connecting the two air outlets 1412 .

[0093] It can be understood that the wind knife 14 can adopt one or more infrared heating plates 142 as needed. For example, when the baking area is small, one infrared heating plate 142 can meet the baking area requirement. When the baking area is large, multiple infrared heating plates 142 can be spliced ​​together to meet the baking area requirement. Multiple infrared heating plates 142 are arranged in sequence along a direction perpendicular to the connection direction of the two air outlets 1412, that is, multiple infrared heating plates 142 are spliced ​​together one by one, so as to realize direct baking of the coated electrode 20 of the lithium battery. The power connection ends 1422 of the multiple infrared heating plates 142 can be electrically connected to the conductive spring pieces 1431 of the same power connection component 143, so as to realize the same power supply, reduce wiring, and reduce the difficulty of assembly.

[0094] Please refer to Fig.10 , Fig.11 , Fig.12 , Fig.13 and Fig.14 In some embodiments, the power connection component 143 includes two power connection bars 1432, each of which is provided with a plurality of conductive spring sheets 1431; the two power connection bars 1432 are respectively located on both sides of the infrared heating plate 142 close to the two air outlets 1412; the two power connection bars 1432 are elastically abutted against and electrically connected to the power connection ends 1422 on both sides of the bottom surface of the infrared heating plate 142 through the conductive spring sheets 1431.

[0095] It can be understood that two power connection strips 1432 are used to electrically connect all the infrared heating plates 142, so that the wind knife 14 only needs to lead two wires to externally power all the infrared heating plates 142, reducing wiring and reducing the difficulty of assembly; each power connection strip 1432 is provided with multiple conductive springs 1431, which can electrically connect multiple infrared heating plates 142 at the same time, and the two power connection strips 1432 are respectively located on both sides of the infrared heating plate 142 close to the two air outlets 1412. The two power connection strips 1432 are elastically abutted against and electrically connected to the power connection ends 1422 on both sides of the bottom surface of the infrared heating plate 142 through the conductive springs 1431, which can stably support multiple infrared heating plates 142 and realize simultaneous power connection of multiple infrared heating plates 142. The two power connection strips 1432 can be externally connected to the positive and negative electrodes (or external high-temperature wiring 1433-live wire and neutral wire) respectively to ensure the power supply to the infrared heating plate 142 and realize the baking effect on the coated electrode 20. The mounting body 141 may be provided with a wire outlet hole to facilitate the introduction of the high temperature wire 1433 into the wire outlet hole to electrically connect the two power strips 1432. A silver-plated bump 1434 may be provided at one end of the conductive spring sheet 1431 extending away from the conductive strip, and the silver-plated bump 1434 is riveted and fixed to the conductive spring sheet 1431, which is conducive to enhancing the conductivity of the infrared heating plate 142 and the power connection component 143.

[0096] The present application provides a coating oven, which includes a box body, an upper hull, a lower hull and multiple air knives; the box body is provided with a feed port and a discharge port, and the feed port and the discharge port are located between the upper hull and the lower hull, so that the coated electrode is transported into the box body from the feed port, and transported through the upper hull and the lower hull, and transported out from the discharge port; multiple air knives are respectively installed on the upper hull and the lower hull, and infrared heating plates are provided on the wind knives, so that the upper hull and the lower hull are both distributed with infrared heating plates, and the heat is radiated by the infrared heating plates to directly bake the coated electrode of the lithium battery, thereby avoiding the problem of heat transfer loss caused by indirect baking of the coated electrode by heated air, reducing energy loss, and helping to improve resource utilization. The top of the installation body is provided with air outlets on both sides, and the air outlets are slit-shaped and face the coated electrode. The bottom of the installation body is provided with an air inlet, and the installation body cover is provided at the air outlet, so that the air outlet is connected with the air inlet; the air inlet is connected with the two air outlets, so that the air flow enters the installation body from the air inlet, and flows out from the air outlet, blowing toward the coated electrode to blow away the solvent and moisture on the coated electrode, thereby improving the baking efficiency; the wind force acts on the coated electrode to form a suspension effect on the coated electrode. The infrared heating plate is used to directly heat the coated electrode, eliminating the structure of the mixed wind chamber channel for heating the air flow, which is conducive to reducing space occupation and manufacturing costs.

[0097] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0098] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes, taking "A and / or B" as an example, including scheme A, or scheme B, or a scheme that satisfies both A and B.

[0099] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0100] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0101] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the application concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A coating oven for baking coated pole pieces, characterized in that: include: A box body, wherein the box body is provided with a feed inlet and a discharge outlet; An upper hull and a lower hull, wherein the upper hull and the lower hull are spaced apart and distributed in the box body along the height direction; the feed inlet and the discharge port are located between the upper hull and the lower hull; the upper hull and the lower hull are both provided with air inlets, and the upper hull and the lower hull are both provided with a plurality of air outlets on opposite sides; A plurality of wind knives, wherein the plurality of wind knives are respectively installed on the upper hull and the lower hull; the wind knives correspond to the air outlets one by one, and the wind knife covers are arranged on the air outlets; Wherein, the wind knife comprises: An installation body, wherein an air inlet is provided at the bottom end of the installation body, and the air inlet is connected to the air outlet; air outlets are provided at both sides of the top end of the installation body, and the air inlet is connected to the two air outlets; An infrared heating plate is installed on the installation body and is located between the two air outlets; the side of the infrared heating plate facing away from the installation body is a heating surface.

2. The coating oven according to claim 1, characterized in that The multiple air outlets of the upper hull and the multiple air outlets of the lower hull are distributed alternately.

3. The coating oven according to claim 1, characterized in that The wind knife comprises: One or more infrared heating panels; Wherein, the plurality of infrared heating panels are arranged successively along a direction perpendicular to a line connecting the two air outlets.

4. The coating oven according to claim 3, characterized in that The bottom surface of the infrared heating plate is a power connection terminal; the wind knife also includes: A power connection component is installed on the installation body and is located on the bottom surface of the infrared heating plate; the power connection component is used for external power supply; the power connection component is provided with a conductive spring sheet with one end extending outward, and the end of the conductive spring sheet extending outward elastically abuts against and is electrically connected to the power connection end.

5. The coating oven according to claim 4, characterized in that The power connection assembly comprises: Two power connection bars, each of which is provided with a plurality of conductive springs; The two power connection bars are respectively located on both sides of the infrared heating plate close to the two air outlets; the two power connection bars are elastically pressed against and electrically connected to the power connection ends on both sides of the bottom surface of the infrared heating plate through the conductive spring sheets.

6. The coating oven according to any one of claims 1 to 5, characterized in that: The coating oven also includes: A height adjustment mechanism is installed on the box body and connected to the upper hull and / or the lower hull, and is used to adjust the height of the upper hull and / or the lower hull.

7. The coating oven according to claim 6, characterized in that The height adjustment mechanism comprises: At least four lifting screws and at least four screw nuts, wherein the at least four screw nuts are installed on the surrounding areas of the upper hull and / or the lower hull, and the lifting screws are cooperatively connected to the screw nuts; one end of the lifting screw protrudes from the box body; A rotating adjustment rod and at least four driving rods, one end of the at least four driving rods is respectively engaged through bevel gears to drive the rotating adjustment rod, and the other end of the at least four driving rods is respectively engaged through bevel gears to drive one end of the at least four lifting screws protruding from the box body; the driving rods correspond to the lifting screws one by one.

8. The coating oven according to claim 6, characterized in that The coating oven also includes: A roller is installed in the box and located between the upper hull and the lower hull; the roller is used to support the coated electrode.

9. The coating oven according to claim 1, characterized in that: The box body is provided with a plurality of air outlets, and the plurality of air outlets are all located between the upper hull and the lower hull; and / or, The box body is provided with two air supply ports, and the two air supply ports are respectively connected to the air inlet of the upper hull and the air inlet of the lower hull.

10. The coating oven according to claim 1, characterized in that: The box body is provided with an explosion-proof valve port; and / or, The box body is provided with a maintenance and installation window.

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