Pole piece drying oven

Abstract

The utility model discloses a pole piece drying oven which comprises an oven body, two ends of the oven body are respectively provided with a pole piece inlet and a pole piece outlet, a first passing roller and a second passing roller are arranged in the oven body, the first passing roller is close to the pole piece inlet, and the second passing roller is close to the pole piece outlet. A plurality of upper air floating rollers and a plurality of lower air floating rollers are arranged in the box body, the upper air floating rollers and the lower air floating rollers are arranged between the first passing roller and the second passing roller, the upper air floating rollers are located above the lower air floating rollers, and the upper air floating rollers and the lower air floating rollers are arranged in an up-down staggered mode; an upper hot air blowing mechanism is arranged at the upper air floating roller, and a lower hot air blowing mechanism is arranged at the lower air floating roller. According to the utility model, streaks on the two surfaces of the pole piece can be avoided, the quality of the pole piece is ensured, cracks and even breakage of the pole piece can be avoided when the pole piece is rolled subsequently, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a pole piece drying oven. Background Art

[0002] Baking and drying the coated pole piece is an important step in lithium battery production. Accelerating the drying rate is an effective way to increase the production rate of pole pieces. In actual production, an oven is usually used to dry the pole piece.

[0003] An existing drying oven generally comprises a box body, with a pole piece inlet and a pole piece outlet respectively arranged at both ends of the box body, a first roller, a second roller and a heating roller mechanism arranged between the first roller and the second roller are arranged in the box body, the first roller is close to the pole piece inlet, the second roller is close to the pole piece outlet, the heating roller mechanism comprises a plurality of heating rollers, and the plurality of heating rollers are alternately staggered up and down. In actual application, the pole piece passes over the top of the first roller, and then alternately passes under the heating roller located below, passes over the heating roller located above, and then passes over the top of the second roller. The pole piece can be contact-supported by the first roller, the second roller and the plurality of heating rollers, and the front and back sides of the pole piece can be heated respectively by the heating roller located below and the heating roller located above, thereby drying the pole piece. In this structure, since multiple heating rollers are in direct contact with both sides of the electrode, and the surface temperature of the heating rollers is often relatively high, streaks will be generated on both sides of the electrode, affecting the quality of the electrode. When the electrode is subsequently rolled, the electrode is prone to cracks or even breaks, reducing production efficiency. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a pole piece drying oven, which can avoid the occurrence of streaks on both sides of the pole piece, thereby ensuring the quality of the pole piece. When the pole piece is subsequently rolled, cracks or even breakage of the pole piece can be avoided, thereby improving production efficiency.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A pole piece drying oven comprises a box body, wherein a pole piece inlet and a pole piece outlet are respectively arranged at two ends of the box body, a first roller and a second roller are arranged in the box body, the first roller is close to the pole piece inlet, and the second roller is close to the pole piece outlet, a plurality of upper air flotation rollers and a plurality of lower air flotation rollers are arranged in the box body, the plurality of the upper air flotation rollers and the plurality of the lower air flotation rollers are arranged between the first roller and the second roller, the plurality of the upper air flotation rollers are located above the plurality of the lower air flotation rollers, the plurality of the upper air flotation rollers and the plurality of the lower air flotation rollers are arranged in an upper and lower staggered manner, an upper hot air blowing mechanism is arranged at the upper air flotation roller, and a lower hot air blowing mechanism is arranged at the lower air flotation roller.

[0007] As a preferred technical solution, the upper air flotation roller includes a semicircular air outlet plate, a first vertical plate, a second vertical plate, a bottom sealing cover and two side sealing covers; the first vertical plate and the second vertical plate are arranged opposite to each other, the top ends of the first vertical plate and the second vertical plate are respectively connected to the two sides of the air outlet plate, the bottom ends of the first vertical plate and the second vertical plate are respectively arranged on the top ends of the bottom sealing cover, one of the side sealing covers is arranged on one end of the air outlet plate, the first vertical plate, the second vertical plate and the bottom sealing cover, the other side sealing cover is arranged on the other end of the air outlet plate, the first vertical plate, the second vertical plate and the bottom sealing cover, the two side sealing covers are respectively connected to the inner sides of the box body The box body is connected to the wall, and an inner cavity is formed between the air outlet plate, the first vertical plate, the second vertical plate, the bottom sealing cover and the two side sealing covers; a plurality of first air outlet holes are evenly distributed on the outer circumference of the air outlet plate, and the plurality of first air outlet holes are respectively connected with the inner cavity, and an air through hole is provided on the side of the side sealing cover close to the inner cavity, and the air through hole is connected with the inner cavity, and an air pipe is provided on the side of the side sealing cover away from the inner cavity, and the air through hole is connected with the inside of the air pipe, and two through holes are respectively provided on the inner walls on both sides of the box body, and the two through holes respectively correspond to the air pipes of the two side sealing covers, and one end of the air pipe away from the side sealing cover passes through the corresponding through holes and is located outside the box body.

[0008] As a preferred technical solution, a plurality of second air outlet holes are evenly distributed on the outer side surfaces of the first vertical plate and the second vertical plate, respectively, and the plurality of second air outlet holes are all connected to the inner cavity.

[0009] As a preferred technical solution, a guide tube is provided in the inner cavity, and the two ends of the guide tube are respectively connected to the two side end sealing covers, and the air holes of the two side end sealing covers are respectively connected to the interior of the guide tube, and the outer circumferential surface of the guide tube is provided with two guide hole groups, and the two guide hole groups are spaced apart along the length direction of the guide tube, and the two guide hole groups are respectively located on both sides of the center of the guide tube, and the guide hole groups include a plurality of guide holes evenly arranged on the outer circumferential surface of the guide tube, and the plurality of guide holes are respectively connected to the interior of the guide tube, and the plurality of guide holes correspond to the air outlet plate, the first vertical plate and the second vertical plate.

[0010] As a preferred technical solution, a pressure equalizing mesh plate is provided in the inner cavity, and the pressure equalizing mesh plate is located between the guide pipe and the air outlet plate, the first vertical plate, and the second vertical plate.

[0011] As a preferred technical solution, the gas outlet plate, the first vertical plate and the second vertical plate are integrally formed, and the gas outlet plate, the first vertical plate and the second vertical plate are all porous graphite parts.

[0012] As a preferred technical solution, the structure of the lower air flotation roller is the same as that of the upper air flotation roller, the air outlet plate of the upper air flotation roller faces upward, and the air outlet plate of the lower air flotation roller faces downward.

[0013] As a preferred technical solution, the diameter of the air outlet plate is 200mm-400mm.

[0014] As a preferred technical solution, the upper hot air mechanism and the lower hot air mechanism both include wind knives, and the two ends of the wind knife are respectively connected to the inner walls on both sides of the box body, the wind knife of the upper hot air mechanism is close to the air outlet plate of the corresponding upper air floatation roller and the air outlet of the wind knife is opposite to the air outlet plate of the corresponding upper air floatation roller, the wind knife of the lower hot air mechanism is close to the air outlet plate of the corresponding lower air floatation roller and the air outlet of the wind knife is opposite to the air outlet plate of the corresponding lower air floatation roller, and an air inlet is provided on one inner wall of the box body, and the air inlet of the wind knife of the upper hot air mechanism and the air inlet of the wind knife of the lower hot air mechanism are respectively connected to the air inlet.

[0015] As a preferred technical solution, there are multiple wind knives, and the multiple wind knives of the upper hot air mechanism are distributed in an arc shape around the outer periphery of the air outlet plate of the corresponding upper air flotation roller, and the multiple wind knives of the lower hot air mechanism are distributed in an arc shape around the outer periphery of the air outlet plate of the corresponding lower air flotation roller.

[0016] The beneficial effect of the utility model is that the utility model can realize the suspended support of the electrode piece by setting up several upper air flotation rollers and several lower air flotation rollers, avoiding direct contact with the two sides of the electrode piece, so that when the upper hot air blowing mechanism and the lower hot air blowing mechanism are used to blow hot air to the electrode piece respectively to achieve heating and drying of the electrode piece, no streaks will appear on the two sides of the electrode piece, thereby ensuring the quality of the electrode piece, and when the electrode piece is subsequently rolled, cracks or even breakage of the electrode piece can be avoided, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of a pole piece drying oven provided by an embodiment of the utility model;

[0019] Figure 2 , Figure 3 yes Figure 1 The schematic diagram of the structure of the upper air floatation roller of the pole piece drying oven shown;

[0020] Figure 4 yes Figure 2 A schematic cross-sectional view of the upper air flotation roller shown;

[0021] Figure 5 yes Figure 2An exploded schematic diagram of the upper air floatation roller is shown. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0023] Please refer to Figure 1 An embodiment of the utility model provides a pole piece drying oven, comprising a box body 10, wherein a pole piece inlet 11 and a pole piece outlet 12 are respectively disposed at two ends of the box body 10.

[0024] The box 10 is provided with a first roller 20, a second roller 30, a plurality of upper air-floating rollers 40a and a plurality of lower air-floating rollers 40b. The first roller 20 and the second roller 30 are of the same size and are arranged in parallel to each other. The two ends of the first roller 20 and the second roller 30 are rotatably arranged on the inner walls of both sides of the box 10 through bearing seats. The first roller 20 is close to the pole piece inlet 11, and the second roller 30 is close to the pole piece outlet 12. The first roller 20 and the second roller 30 are respectively used for contact support of the pole piece 100.

[0025] A plurality of upper air flotation rollers 40a and a plurality of lower air flotation rollers 40b are arranged between the first passing roller 20 and the second passing roller 30. The plurality of upper air flotation rollers 40a are located above the plurality of lower air flotation rollers 40b, and the plurality of upper air flotation rollers 40a and the plurality of lower air flotation rollers 40b are arranged in an up-down staggered manner. The upper air flotation rollers 40a and the lower air flotation rollers 40b are respectively used for suspending and supporting the electrode sheet 100. An upper hot air blowing mechanism 50a is provided at the upper air flotation roller 40a, and a lower hot air blowing mechanism 50b is provided at the lower air flotation roller 40b. The upper hot air blowing mechanism 50a and the lower hot air blowing mechanism 50b are respectively used for blowing hot air on the front and back sides of the electrode sheet 100 to heat and dry the electrode sheet 100. In this embodiment, there is one upper air flotation roller 40a and two lower air flotation rollers 40b. It can be understood that the number of the upper air flotation rollers 40a and the lower air flotation rollers 40b can be set according to actual conditions.

[0026] In actual application, the electrode piece 100 enters the box body 10 from the electrode piece inlet 11, and then passes through the top of the first roller 20, the bottom of the first lower air flotation roller 40b, the top of the upper air flotation roller 40a, the bottom of the second lower air flotation roller 40b and the top of the second roller 30 in turn, and then comes out from the electrode piece outlet 12. The first roller 20 and the second roller 30 can respectively provide contact support for the electrode piece 100, and the upper air flotation roller 40a and the two lower air flotation rollers 40b can respectively provide suspension support for the electrode piece 100, and the upper hot air blowing mechanism 50a and the lower hot air blowing mechanism 50b can respectively blow hot air to the front and back sides of the electrode piece 100, thereby heating and drying the electrode piece. The utility model can realize the suspension support of the electrode piece 100 by setting up several upper air flotation rollers 40a and several lower air flotation rollers 40b, avoiding direct contact with the two sides of the electrode piece 100. In this way, when the upper hot air blowing mechanism 50a and the lower hot air blowing mechanism 50b are used to blow hot air to the electrode piece 100 respectively to achieve heating and drying of the electrode piece 100, no streaks will appear on the two sides of the electrode piece 100, thereby ensuring the quality of the electrode piece 100. When the electrode piece 100 is subsequently rolled, cracks or even breaks in the electrode piece 100 can be avoided, thereby improving production efficiency.

[0027] Combination Figures 2 to 5 As shown, the upper air flotation roller 40 a includes a semicircular air outlet plate 41 , a first vertical plate 42 , a second vertical plate 43 , a bottom sealing cover 44 and two side sealing covers 45 .

[0028] The first vertical plate 42 and the second vertical plate 43 are arranged opposite to each other on the left and right sides. The top ends of the first vertical plate 42 and the second vertical plate 43 are respectively connected to the two sides of the air outlet plate 41, and the bottom ends of the first vertical plate 42 and the second vertical plate 43 are respectively arranged at the top ends of the bottom sealing cover 44. One of the side sealing covers 45 is arranged at one end of the air outlet plate 41, the first vertical plate 42, the second vertical plate 43 and the bottom sealing cover 44, and the other side sealing cover 45 is arranged at the other end of the air outlet plate 41, the first vertical plate 42, the second vertical plate 43 and the bottom sealing cover 44. The two side sealing covers 45 are respectively connected to the inner walls on both sides of the box body 10. An inner cavity is formed between the air outlet plate 41, the first vertical plate 42, the second vertical plate 43, the bottom sealing cover 44 and the two side sealing covers 45. A plurality of first air outlet holes are evenly distributed on the outer peripheral surface of the air outlet plate 41, and the plurality of first air outlet holes are respectively connected to the inner cavity. An air hole 451 is provided on the side of the side end sealing cover 45 close to the inner cavity, and the air hole 451 is connected to the inner cavity. An air pipe 452 corresponding to the air hole 451 is provided on the side of the side end sealing cover 45 away from the inner cavity, and the air hole 451 is connected to the inside of the air pipe 452. Two through holes are respectively provided on the inner walls of the two sides of the box body 10, and the two through holes correspond to the air pipes 452 of the two side end sealing covers 45. One end of the air pipe 452 away from the side end sealing cover 45 passes through the corresponding through holes and is located outside the box body 10, and one end of the air pipe 452 away from the side end sealing cover 45 is used to connect to the air supply device. In actual application, after clean compressed air is introduced into the air pipes 452 of the two side end sealing covers 45 through the air supply equipment, the compressed air can enter the inner cavity through the air holes 451 of the two side end sealing covers 45, and then flow out from the multiple first air outlets. The air flowing out of the multiple first air outlets can form a high-rigidity and uniform air film on the outer peripheral surface of the air outlet plate 41. When the pole piece 100 passes over the upper air floating roller 40a, the pole piece 100 can be lifted up by the air film, so that the pole piece 100 is suspended, thereby realizing the suspension support of the pole piece 100. The size, number and shape of the first air outlet can be set according to actual conditions.

[0029] Furthermore, the outer side surfaces of the first vertical plate 42 and the second vertical plate 43 are evenly distributed with a plurality of second air outlets, and the plurality of second air outlets are all connected to the inner cavity. In practical applications, after the compressed air enters the inner cavity through the air holes 451 of the two side end sealing covers 45, it can flow out from the plurality of first air outlets and the plurality of second air outlets at the same time. The air flowing out from the plurality of second air outlets of the first vertical plate 42 can form an air film on the outer side surface of the first vertical plate 42, and the air flowing out from the plurality of second air outlets of the second vertical plate 43 can form an air film on the outer side surface of the second vertical plate 43. The air film on the outer side surface of the first vertical plate 42 and the air film on the outer side surface of the second vertical plate 43 can further realize the suspension support of the pole piece 100, which can make the pole piece 100 more stable and avoid the pole piece 100 from scratching the upper air floating roller 40a. The size and shape of the second air outlet are the same as those of the first air outlet. The number of the second air outlet can be set according to actual conditions.

[0030] In this embodiment, the outer side surface of the first vertical plate 42 and the outer side surface of the second vertical plate 43 are tangent to the outer peripheral surface of the gas outlet plate 41, which can avoid scratching the pole piece 100. The gas outlet plate 41, the first vertical plate 42 and the second vertical plate 43 are integrally formed for easy manufacturing. The gas outlet plate 41, the first vertical plate 42 and the second vertical plate 43 are all porous graphite parts.

[0031] The diameter of the air outlet plate 41 is 200 mm (millimeter) - 400 mm, preferably 300 mm. This diameter allows the upper air flotation roller 40a to produce a large wrap angle, so that the pole piece 100 can turn at a large wrap angle when passing over the upper air flotation roller 40a, thereby avoiding warping and curling of the pole piece 100, and further avoiding cracking of the pole piece 100.

[0032] Further, a flow guide pipe 47 is provided in the inner cavity, and the two ends of the flow guide pipe 47 are respectively connected to the two side end sealing covers 45. The flow guide pipe 47 is close to the bottom end sealing cover 44. The air holes 451 of the two side end sealing covers 45 correspond to the flow guide pipe 47 and are respectively connected to the inside of the flow guide pipe 47. The outer peripheral surface of the flow guide pipe 47 is provided with two flow guide hole groups, and the two flow guide hole groups are spaced and distributed along the length direction of the flow guide pipe 47. The two flow guide hole groups are located on both sides of the center of the flow guide pipe 47. The flow guide hole group includes a plurality of flow guide holes 471 uniformly arranged on the outer peripheral surface of the flow guide pipe 47, and the plurality of flow guide holes 471 are respectively connected to the inside of the flow guide pipe 47, so that the air holes 451 of the side end sealing cover 45 are connected to the inner cavity through the inside of the flow guide pipe 47 and the plurality of flow guide holes 471 of the two flow guide hole groups. The plurality of flow guide holes 471 correspond to the gas outlet plate 41, the first vertical plate 42, and the second vertical plate 43. In actual application, after clean compressed air is introduced into the air pipes 452 of the two side end sealing covers 45 through the air supply equipment, the compressed air can enter the guide pipe 47 through the air holes 451 of the two side end sealing covers 45, and then enter the inner cavity through the multiple guide holes 471 of the two guide hole groups, and then flow out through the multiple first outlet holes of the outlet plate 41, the multiple second outlet holes of the first vertical plate 42, and the multiple second outlet holes of the second vertical plate 43. The guide pipe 47 is set so that the air is uniform after flowing out from the multiple guide holes 471 of the two guide hole groups, so that the air will not form a high pressure area in the middle of the inner cavity due to convergence, thereby not affecting the stability of the upper air floating roller 40a supporting the pole piece 100, and can further ensure the stability of the pole piece 100 running. The multiple guide holes 471 correspond to the air outlet plate 41, the first vertical plate 42, and the second vertical plate 43, that is, the outer peripheral surface of the guide tube 47 is not provided with guide holes 471 near the bottom sealing cover 44, so that the air flowing out from the multiple guide holes 471 will not impact the bottom sealing cover 44 and will not cause pressure loss.

[0033] Furthermore, a pressure-equalizing mesh plate 48 is provided in the inner cavity, and the pressure-equalizing mesh plate 48 is close to the air outlet plate 41, the first vertical plate 42 and the second vertical plate 43. The pressure-equalizing mesh plate 48 is located between the flow guide tube 47 and the air outlet plate 41, the first vertical plate 42 and the second vertical plate 43. In actual application, the holes 481 of the pressure-equalizing mesh plate 48 can be used to evenly distribute the compressed air in the inner cavity, ensuring that the air pressure reaching the inner peripheral surface of the air outlet plate 41, the inner side surface of the first vertical plate 42 and the inner side surface of the second vertical plate 43 is uniform, so that a stable air film can be further formed on the outer peripheral surface of the air outlet plate 41, the outer side surface of the first vertical plate 42 and the outer side surface of the second vertical plate 43, and further stable support for the pole piece 100 can be achieved.

[0034] The structure of the lower air floatation roller 40b is the same as that of the upper air floatation roller 40a. The lower air floatation roller 40b and the upper air floatation roller 40a are staggered in an up-down manner. The air outlet plate 41 of the upper air floatation roller 40a faces upward, and the air outlet plate 41 of the lower air floatation roller 40b faces downward, that is, the upper air floatation roller 40a and the lower air floatation roller 40b are symmetrically arranged, and the structure of the lower air floatation roller 40b is not described here. The lower air floatation roller 40b can achieve the same technical effect as the upper air floatation roller 40a, and is not described here.

[0035] The upper hot air blowing mechanism 50a and the lower hot air blowing mechanism 50b both include an air knife 51, which is an existing structure and will not be described in detail here. The two ends of the air knife 51 are respectively connected to the inner walls of the box body 10 on both sides. The air knife 51 of the upper hot air blowing mechanism 50a is close to the air outlet plate 41 of the corresponding upper air floatation roller 40a, and the air outlet of the air knife 51 is opposite to the air outlet plate 41 of the corresponding upper air floatation roller 40a. The air knife 51 of the lower hot air blowing mechanism 50b is close to the air outlet plate 41 of the corresponding lower air floatation roller 40b, and the air outlet of the air knife 51 is opposite to the air outlet plate 41 of the corresponding lower air floatation roller 40b. An air inlet is provided on one inner wall of the box body 10, and the air inlet is used to be connected to the heating device through a connecting pipe, and the heating device is used to generate hot air. The air inlet of the air knife 51 of the upper hot air blowing mechanism 50a and the air inlet of the air knife 51 of the lower hot air blowing mechanism 50b are connected to the air inlet through the connecting pipe. In actual application, the hot air generated by the heating device can enter the air inlet through the connecting pipe, and the hot air entering the air inlet can enter the air knife 51 of the upper hot air blowing mechanism 50a through the air inlet of the air knife 51 of the upper hot air blowing mechanism 50a, and enter the air knife 51 of the lower hot air blowing mechanism 50b through the air inlet of the air knife 51 of the lower hot air blowing mechanism 50b, and then can be blown to the front and back of the pole piece 100 through the air outlet of the air knife 51 of the upper hot air blowing mechanism 50a and the air outlet of the air knife 51 of the lower hot air blowing mechanism 50b, respectively, so as to achieve heating and drying of the pole piece 100.

[0036] In this embodiment, there are multiple wind knives 51, for example three. The three wind knives 51 of the upper hot air blowing mechanism 50a are distributed in an arc shape around the outer periphery of the air outlet plate 41 of the corresponding upper air flotation roller 40a, and the three wind knives 51 of the lower hot air blowing mechanism 50b are distributed in an arc shape around the outer periphery of the air outlet plate 41 of the corresponding lower air flotation roller 40b. It can be understood that the number of wind knives 51 can be set according to actual conditions.

[0037] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A pole piece drying oven, comprising a box body, wherein both ends of the box body are respectively provided with a pole piece inlet and a pole piece outlet, wherein a first roller and a second roller are provided in the box body, wherein the first roller is close to the pole piece inlet, and the second roller is close to the pole piece outlet, wherein: A plurality of upper air flotation rollers and a plurality of lower air flotation rollers are arranged in the box body, the plurality of upper air flotation rollers and the plurality of lower air flotation rollers are arranged between the first passing roller and the second passing roller, the plurality of upper air flotation rollers are located above the plurality of lower air flotation rollers, the plurality of upper air flotation rollers and the plurality of lower air flotation rollers are arranged in an upper and lower staggered manner, an upper hot air blowing mechanism is provided at the upper air flotation rollers, and a lower hot air blowing mechanism is provided at the lower air flotation rollers.

2. The pole piece drying oven according to claim 1, characterized in that: The upper air floating roller comprises a semicircular air outlet plate, a first vertical plate, a second vertical plate, a bottom sealing cover and two side sealing covers; The first vertical plate and the second vertical plate are arranged opposite to each other, the top ends of the first vertical plate and the second vertical plate are respectively connected to the two sides of the air outlet plate, the bottom ends of the first vertical plate and the second vertical plate are respectively arranged at the top ends of the bottom sealing cover, one side sealing cover is arranged at one end of the air outlet plate, the first vertical plate, the second vertical plate and the bottom sealing cover, the other side sealing cover is arranged at the other end of the air outlet plate, the first vertical plate, the second vertical plate and the bottom sealing cover, the two side sealing covers are respectively connected to the inner walls of the two sides of the box body, and an inner cavity is formed between the air outlet plate, the first vertical plate, the second vertical plate, the bottom sealing cover and the two side sealing covers; A plurality of first air outlet holes are evenly distributed on the outer peripheral surface of the air outlet plate, and the plurality of first air outlet holes are respectively connected with the inner cavity; an air through hole is provided on the side of the side end sealing cover close to the inner cavity, and the air through hole is connected with the inner cavity; an air pipe is provided on the side of the side end sealing cover away from the inner cavity, and the air through hole is connected with the interior of the air pipe; two through holes are respectively provided on the inner walls on both sides of the box body, and the two through holes respectively correspond to the air pipes of the two side end sealing covers, and one end of the air pipe away from the side end sealing cover passes through the corresponding through holes and is located outside the box body.

3. The pole piece drying oven according to claim 2, characterized in that: A plurality of second air outlet holes are evenly distributed on the outer side surfaces of the first vertical plate and the second vertical plate, respectively, and the plurality of second air outlet holes are all connected to the inner cavity.

4. The pole piece drying oven according to claim 3, characterized in that: A flow guide pipe is provided in the inner cavity, and both ends of the flow guide pipe are respectively connected to the two side end sealing covers, and the air holes of the two side end sealing covers are respectively communicated with the interior of the flow guide pipe, and the outer circumferential surface of the flow guide pipe is provided with two flow guide hole groups, and the two flow guide hole groups are spaced apart along the length direction of the flow guide pipe, and the two flow guide hole groups are respectively located on both sides of the center of the flow guide pipe, and the flow guide hole groups include a plurality of flow guide holes uniformly arranged on the outer circumferential surface of the flow guide pipe, and the plurality of flow guide holes are respectively communicated with the interior of the flow guide pipe, and the plurality of flow guide holes correspond to the air outlet plate, the first vertical plate, and the second vertical plate.

5. The pole piece drying oven according to claim 4, characterized in that: A pressure equalizing mesh plate is provided in the inner cavity, and the pressure equalizing mesh plate is located between the flow guide pipe and the air outlet plate, the first vertical plate, and the second vertical plate.

6. The pole piece drying oven according to claim 2, characterized in that: The gas outlet plate, the first vertical plate and the second vertical plate are integrally formed, and the gas outlet plate, the first vertical plate and the second vertical plate are all porous graphite parts.

7. The pole piece drying oven according to claim 2, characterized in that: The structure of the lower air flotation roller is the same as that of the upper air flotation roller, the air outlet plate of the upper air flotation roller faces upward, and the air outlet plate of the lower air flotation roller faces downward.

8. The pole piece drying oven according to claim 2, characterized in that: The diameter of the air outlet plate is 200mm-400mm.

9. The pole piece drying oven according to claim 2, characterized in that: The upper hot air blowing mechanism and the lower hot air blowing mechanism both include wind knives, and the two ends of the wind knife are respectively connected to the inner walls on both sides of the box body, the wind knife of the upper hot air blowing mechanism is close to the air outlet plate of the corresponding upper air floatation roller, and the air outlet of the wind knife is opposite to the air outlet plate of the corresponding upper air floatation roller, and the wind knife of the lower hot air blowing mechanism is close to the air outlet plate of the corresponding lower air floatation roller, and the air outlet of the wind knife is opposite to the air outlet plate of the corresponding lower air floatation roller, and an air inlet is provided on one inner wall of the box body, and the air inlet of the wind knife of the upper hot air mechanism and the air inlet of the wind knife of the lower hot air mechanism are respectively connected to the air inlet.

10. The pole piece drying oven according to claim 9, characterized in that: There are multiple wind knives, and the multiple wind knives of the upper hot air mechanism are distributed in an arc shape around the outer circumference of the air outlet plate of the corresponding upper air flotation roller, and the multiple wind knives of the lower hot air mechanism are distributed in an arc shape around the outer circumference of the air outlet plate of the corresponding lower air flotation roller.

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