Tunnel type coated pole piece drying device and equipment thereof

Abstract

The utility model provides a tunnel type coated pole piece drying device and equipment thereof. The tunnel type coated pole piece drying device comprises an air outlet assembly, wherein the air outlet assembly comprises a plurality of first air knife main bodies and a plurality of second air knife main bodies which are arranged on a drying conveying channel; the multiple first air knife bodies are linearly distributed above the pole piece, the multiple second air knife bodies are linearly distributed below the pole piece, the multiple first air knife bodies and the multiple second air knife bodies are arranged in an up-down staggered mode, each first air knife body is provided with a first air knife opening, and each second air knife body is provided with a second air knife opening. The air outlet direction of the first air knife edge and the air outlet direction of the second air knife edge respectively form an acute angle with the pole piece, so that direct blowing of the pole piece passing through the drying conveying channel by the first air knife edge and the second air knife edge can be effectively avoided, the air outlet effect of hot air is smoother, the shaking amplitude of the pole piece is reduced, and the drying efficiency is improved. Therefore, the drying uniformity of the pole piece is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pole piece drying equipment, in particular to a tunnel type coating pole piece drying device and equipment thereof. BACKGROUND

[0002] In the production process of lithium batteries, coating the pole piece is an essential process. The pole piece coating process is to uniformly coat the prepared paste-like thick slurry on the current collector (generally aluminum foil for the positive electrode and copper foil for the negative electrode). During the coating process, the thickness of the coating position needs to be consistent, and the coating thickness needs to be controlled within the process tolerance range. Then, the coated slurry is dried in an oven to obtain the finished pole piece.

[0003] Currently, the traditional oven mainly uses hot air drying to dry the slurry coated on the current collector. For example, Chinese patent document CN210304426U - a battery coating drying box, which includes: a box body, the two ends of the box body are respectively provided with an inlet and an outlet, and the box body has an accommodating space inside; a conveying device, the conveying device is located in the accommodating space, and the conveying device is used to drive the pole piece to move in the accommodating space; a drying device, the drying device is located in the accommodating space, and the drying device is arranged on the upper and lower sides of the conveying device, and the end of the drying device facing the conveying surface of the conveying device is provided with a plurality of air outlets; the air outlets include at least one adjustable air outlet, and the adjustable air outlet is located at the end of the drying device close to the outlet. The drying device dries the pole piece on the conveying device through the air outlets, and the adjustable air outlet controls the drying area of the pole piece by adjusting the air outlet range, so that the pole piece is evenly dried, effectively solving the pole piece rolling phenomenon in the prior art, and improving the drying efficiency of the pole piece and the yield of the production.

[0004] However, the above-mentioned patent disclosed technical scheme still has the following problems:

[0005] The plurality of first air nozzles and the plurality of second air nozzles of the above-mentioned battery coating drying box are arranged on the upper and lower sides of the pole piece, which makes the first air port and the second air port form a direct blowing to the pole piece, thus easily increasing the shaking amplitude of the pole piece, and further ensuring the uniformity of the pole piece drying. INVENTION CONTENTS

[0006] The utility model aims at overcoming the defects in the prior art, and provides a tunnel type coating pole piece drying device and equipment thereof, which can make the air outlet effect of hot air more gentle, thereby reducing the shaking amplitude of the pole piece, and further ensuring the uniformity of the pole piece drying.

[0007] The utility model aims at overcoming the defects in the prior art, and provides a tunnel type coating pole piece drying device and equipment thereof, which can make the air outlet effect of hot air more gentle, thereby reducing the shaking amplitude of the pole piece, and further ensuring the uniformity of the pole piece drying.

[0008] A tunnel type coated pole piece drying device, comprising a box body, the box body is provided with a feeding port, a drying conveying channel and a discharging port which are communicated in sequence, the drying conveying channel is used for closed drying of the pole piece passing through the drying conveying channel, and the tunnel type coated pole piece drying device further comprises:

[0009] An air outlet assembly, comprising a plurality of first air knife bodies and a plurality of second air knife bodies arranged in the drying conveying channel; a plurality of the first air knife bodies are linearly distributed above the pole piece, a plurality of the second air knife bodies are linearly distributed below the pole piece, and the plurality of first air knife bodies and the plurality of second air knife bodies are arranged in an upper and lower staggered manner; each of the first air knife bodies is provided with a first air knife opening, each of the second air knife bodies is provided with a second air knife opening, and the air outlet directions of the first air knife opening and the second air knife opening are arranged at an acute angle with the pole piece.

[0010] In one of the embodiments, the acute angle ranges from 15 degrees to 45 degrees.

[0011] In one of the embodiments, the number of the first air knife openings is two, and the two first air knife openings are arranged oppositely; the number of the second air knife openings is two, and the two second air knife openings are arranged oppositely.

[0012] In one of the embodiments, the tunnel type coated pole piece drying device further comprises an upper air exhaust plate and a lower air exhaust plate; the upper air exhaust plate is located above the drying conveying channel, and the lower air exhaust plate is located below the drying conveying channel; the upper air exhaust plate and the lower air exhaust plate are fixedly connected with the box body respectively.

[0013] In one of the embodiments, the upper air exhaust plate is provided with an upper air exhaust area along both sides of the conveying direction of the drying conveying channel, and the lower air exhaust plate is provided with a lower air exhaust area along both sides of the conveying direction of the drying conveying channel; the upper air exhaust area and the lower air exhaust area are used for exhausting the hot air in the drying conveying channel.

[0014] In one of the embodiments, the plurality of first air knife bodies are fixedly installed on one side of the upper air exhaust plate adjacent to the pole piece, and the plurality of second air knife bodies are fixedly installed on one side of the lower air exhaust plate adjacent to the pole piece.

[0015] In one of the embodiments, the upper air exhaust area is provided with a plurality of first air exhaust openings, the lower air exhaust area is provided with a plurality of second air exhaust openings, the hot air is exhausted through the plurality of first air exhaust openings and the plurality of second air exhaust openings, and the plurality of first air exhaust openings and the plurality of second air exhaust openings are arranged in a honeycomb shape.

[0016] In one embodiment, the housing is further provided with an observation port that communicates with the drying conveying channel, and an opening and closing door panel that matches the observation port is provided on the outer edge of the housing adjacent to the observation port. The opening and closing door panel is used to seal the observation port.

[0017] In one embodiment, the tunnel-type coated electrode drying device further includes a rotating support assembly, which includes a fixing member, a bearing member, and a supporting roller; one end of the fixing member is fixedly connected to the lower exhaust plate, the bearing member is fixedly installed at the other end of the fixing member, one end of the supporting roller is rotatably connected to the bearing member, and the other end of the supporting roller extends below the electrode and rolls against the electrode passing through the drying conveyor channel.

[0018] A tunnel-type coated electrode drying device includes the tunnel-type coated electrode drying apparatus described in any of the above embodiments.

[0019] Compared with the prior art, the present invention has at least the following advantages:

[0020] By staggering the first and second air knife bodies vertically within the drying conveyor channel, and setting the air outlet directions of the first and second air knife nozzles at acute angles to the electrode sheets, the direct blowing of the first and second air knife nozzles onto the electrode sheets passing through the drying conveyor channel can be effectively avoided. This results in a smoother airflow, reducing the swaying amplitude of the electrode sheets and ensuring uniform drying of the electrode sheets. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a tunnel-type coated electrode drying device in one embodiment;

[0023] Figure 2 for Figure 1 The diagram shows the structure of a tunnel-type coated electrode drying device.

[0024] Figure 3 for Figure 1 A partial structural schematic diagram of the tunnel-type coated electrode drying device is shown.

[0025] Figure 4 for Figure 3A partial enlarged view of the tunnel type coated pole piece drying device shown at A;

[0026] Figure 5 For Figure 1 A partial structural schematic view of the tunnel type coated pole piece drying device shown;

[0027] Figure 6 For Figure 1 A partial structural schematic view of the tunnel type coated pole piece drying device shown;

[0028] The figure mark: tunnel type coated pole piece drying device 10;Box 100;Inlet 101;Drying conveying channel 102;Discharge port 103;Observation port 104;Air outlet assembly 200;First air knife body 210;First air knife mouth 2101;Second air knife body 220;Second air knife mouth 2201;Upper exhaust plate 300;Upper exhaust area 310;First exhaust port 3101;Lower exhaust plate 400;Lower exhaust area 410;Second exhaust port 4101;Rotary support assembly 500;Fixing piece 510;Bearing piece 520;Support roller 530. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, the following will be described in more detail with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0030] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0032] This disclosure provides a tunnel-type coated electrode drying device, including a housing. The housing has a feed inlet, a drying conveying channel, and a discharge outlet connected in sequence. The drying conveying channel is used to perform sealed drying of the electrode passing through the drying conveying channel. The tunnel-type coated electrode drying device also includes an air outlet assembly, which includes a plurality of first air knife bodies and a plurality of second air knife bodies disposed in the drying conveying channel. The plurality of first air knife bodies are linearly distributed above the electrode, and the plurality of second air knife bodies are linearly distributed below the electrode, and the plurality of first air knife bodies and the plurality of second air knife bodies are vertically staggered. Each first air knife body has a first air knife opening, and each second air knife body has a second air knife opening. The air outlet direction of the first air knife opening and the air outlet direction of the second air knife opening are respectively set at acute angles to the electrode.

[0033] Please see Figures 1 to 6 To better understand the tunnel-type coated electrode drying apparatus 10 of this application, the following further explanation of the tunnel-type coated electrode drying apparatus 10 is provided:

[0034] One embodiment of the tunnel-type coated electrode drying device 10 includes a housing 100, which has a feed inlet 101, a drying conveying channel 102, and a discharge outlet 103 connected in sequence. The drying conveying channel 102 is used to perform sealed drying of the electrode sheets passing through the drying conveying channel 102. The tunnel-type coated electrode drying device 10 also includes an air outlet assembly 200, which includes a plurality of first air knife bodies 210 and a plurality of second air knife bodies 220 disposed in the drying conveying channel 102. The air knife bodies 210 are linearly distributed above the electrode sheet, and the multiple second air knife bodies 220 are linearly distributed below the electrode sheet. The multiple first air knife bodies 210 and the multiple second air knife bodies 220 are staggered vertically. Each first air knife body 210 has a first air knife opening 2101, and each second air knife body 220 has a second air knife opening 2201. The air outlet direction of the first air knife opening 2101 and the air outlet direction of the second air knife opening 2201 are respectively set at acute angles to the electrode sheet.

[0035] In this embodiment, by staggering the first air knife bodies 210 and the second air knife bodies 220 within the drying conveying channel 102, and by setting the air outlet directions of the first air knife 2101 and the second air knife 2201 at acute angles to the electrode, the direct blowing of the first air knife 2101 and the second air knife 2201 onto the electrode passing through the drying conveying channel 102 can be effectively avoided. This makes the hot air outlet effect smoother, thereby reducing the swaying amplitude of the electrode and ensuring the uniformity of electrode drying.

[0036] It should be noted that, as shown in Figure 2 , the a angle is an acute angle between the air outlet direction of the first air knife opening 2101 and the air outlet direction of the second air knife opening 2201 and the pole piece.

[0037] As shown in Figures 2 to 4 , in one embodiment, the acute angle ranges from 15 degrees to 45 degrees. In this way, the hot air blown out of the first air knife opening 2101 and the second air knife opening 2201 can effectively avoid direct blowing on the pole pieces passing through the drying conveying channel 102, so that the air outlet effect of the hot air is more gentle; further, in other embodiments, in order to ensure the uniformity and density of the hot air blown out of the first air knife opening 2101 and the second air knife opening 2201, a wind net is additionally provided at the first air knife opening 2101 and the second air knife opening 2201, the wind net is provided with a large number of filter holes to form air outlet adjustment before the hot air is blown out, thereby ensuring the uniformity and density of the air outlet.

[0038] As shown in Figure 4 , in one embodiment, the number of the first air knife openings 2101 is two, and the two first air knife openings 2101 are oppositely arranged; the number of the second air knife openings 2201 is two, and the two second air knife openings 2201 are oppositely arranged. In this way, the air outlet efficiency of the first air knife body 210 and the second air knife body 220 is effectively improved, thereby improving the overall drying rate of the tunnel type coated pole piece drying device 10.

[0039] As shown in Figure 1 , Figure 5 and Figure 6 , in one embodiment, the tunnel type coated pole piece drying device 10 further comprises an upper air exhaust plate 300 and a lower air exhaust plate 400; the upper air exhaust plate 300 is located above the drying conveying channel 102, and the lower air exhaust plate 400 is located below the drying conveying channel 102, and the upper air exhaust plate 300 and the lower air exhaust plate 400 are fixedly connected with the box body 100. In one embodiment, the upper air exhaust plate 300 is provided with an upper air exhaust area 310 on both sides along the conveying direction of the drying conveying channel 102, and the lower air exhaust plate 400 is provided with a lower air exhaust area 320 on both sides along the conveying direction of the drying conveying channel 102, and the upper air exhaust area 310 and the lower air exhaust area 320 are used to exhaust the hot air in the drying conveying channel 102.

[0040] It can be understood that by arranging the upper exhaust area 310 on both sides of the upper exhaust plate 300 along the conveying direction of the drying conveying channel 102, and arranging the lower exhaust area 320 on both sides of the lower exhaust plate 400 along the conveying direction of the drying conveying channel 102, the hot air blown out from the first air knife opening 2101 and the second air knife opening 2201 can stay in the middle region of the upper exhaust plate 300 and the lower exhaust plate 400 for a longer time, that is, the hot air in the middle region stays for a longer time than the hot air in the two side regions, so that more slurry can be continuously dried in the middle region of the pole piece, so as to balance the drying time of different parts of the pole piece, thereby reducing the situation that the two sides of the pole piece dry first and the middle part dries later, and thus avoiding the problem of curling of the pole piece.

[0041] As shown in Figure 2 , Figure 4 , Figure 5 and Figure 6 indicate that in one embodiment, a plurality of first air knife bodies 210 are fixedly installed on one side of the upper exhaust plate 300 adjacent to the pole piece, and a plurality of second air knife bodies 220 are fixedly installed on one side of the lower exhaust plate 400 adjacent to the pole piece. In this way, the compactness of the tunnel type coated pole piece drying device 10 can be improved, so that the first air knife opening 2101 and the second air knife opening 2201 have a good preset distance to the pole piece, thereby improving the quality of hot air drying.

[0042] As shown in Figures 2 to 6 , in one embodiment, the upper exhaust area 310 is provided with a plurality of first exhaust openings 3101, and the lower exhaust area 320 is provided with a plurality of second exhaust openings 3201, and the hot air is discharged through the plurality of first exhaust openings 3101 and the plurality of second exhaust openings 3201, and the plurality of first exhaust openings 3101 and the plurality of second exhaust openings 3201 are arranged in a honeycomb shape. In this way, the airflow state of the hot air discharged from the first exhaust opening 3101 and the second exhaust opening 3201 is more uniform, thereby better stabilizing the airflow state of the hot air in the drying conveying channel 102 to ensure the drying quality of the pole piece.

[0043] It should be noted that in the present embodiment, although the first air knife body 210 is fixedly installed on the upper exhaust plate 300 and the second air knife body 220 is fixedly installed on the lower exhaust plate 400, the first air knife body 210 and the second air knife body 220 are provided with independent air supply systems (not shown), and the upper exhaust area 310 of the upper exhaust plate 300 and the lower exhaust area 320 of the lower exhaust plate 400 are also connected with independent exhaust channels (not shown), so that the tunnel type coated pole piece drying device 10 has a more reasonable air duct distribution design.

[0044] As shown in Figure 1As shown, in one embodiment, the box 100 is also provided with an observation opening 104 which is in communication with the drying conveying channel 102, and the box 100 is provided with a matched opening and closing door plate (not shown) which is matched with the observation opening 104 and is arranged adjacent to the outer edge of the observation opening 104, and the opening and closing door plate is used to seal the observation opening 104.

[0045] It can be understood that the user can observe the actual situation in the drying conveying channel 102 through the observation opening 104, and then the opening and closing door plate can be closed to the observation opening 104 to realize the overall drying sealing of the drying conveying channel 102.

[0046] As shown, Figures 1 to 4 As shown, in one embodiment, the box 100 is also provided with an observation opening 104 which is in communication with the drying conveying channel 102, and the box 100 is provided with a matched opening and closing door plate (not shown) which is matched with the observation opening 104 and is arranged adjacent to the outer edge of the observation opening 104, and the opening and closing door plate is used to seal the observation opening 104. Thus, the rotation supporting assembly 500 is arranged below the drying conveying channel 102, and the overpass roller 530 is in rolling abutment with the pole piece which passes through the drying conveying channel 102, so that the transportation of the pole piece is more stable, and the pole piece is prevented from being excessively drooped.

[0047] The application also provides a tunnel type pole piece drying device, which comprises the tunnel type pole piece drying device 10 of any one of the above-mentioned embodiments.

[0048] In the embodiment, the first air knife body 210 and the second air knife body 220 are arranged in the drying conveying channel 102 in an up-down staggered manner, and the air outlet directions of the first air knife opening 2101 and the second air knife opening 2201 are arranged at an acute angle with the pole piece, so that the pole piece passing through the drying conveying channel 102 is effectively prevented from being directly blown by the first air knife opening 2101 and the second air knife opening 2201, the air outlet effect of the hot air is more gentle, the shaking amplitude of the pole piece is reduced, and the uniformity of the pole piece drying is ensured.

[0049] Compared with the prior art, the utility model has at least the following advantages:

[0050] By setting the plurality of first air knife bodies and the plurality of second air knife bodies in the drying conveying channel in an up-down staggered manner, and setting the air outlet directions of the first air knife openings and the second air knife openings to be at an acute angle with the pole pieces respectively, the direct blowing of the first air knife openings and the second air knife openings to the pole pieces passing through the drying conveying channel can be effectively avoided, the air outlet effect of the hot air is more gentle, and the shaking amplitude of the pole pieces is reduced, so that the uniformity of the drying of the pole pieces is ensured.

[0051] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A tunnel type coating pole piece drying device, comprising a box body, the box body is provided with a feeding port, a drying conveying channel and a discharging port which are sequentially communicated, the drying conveying channel is used for closed drying of the pole piece passing through the drying conveying channel, characterized in that, The tunnel type coated pole piece drying device further comprises: The air outlet assembly comprises a plurality of first air knife bodies and a plurality of second air knife bodies arranged above and below the pole piece, and the first air knife bodies and the second air knife bodies are arranged in an upper and lower staggered manner.

2. The tunnel-type coated pole piece drying apparatus according to claim 1, wherein The acute angle ranges from 15 degrees to 45 degrees.

3. The tunnel-type coated pole piece drying apparatus according to claim 1, wherein The number of the first air knife openings is two, and the two first air knife openings are arranged oppositely.

4. The tunnel-type coated pole piece drying apparatus according to claim 1, wherein The tunnel type coated pole piece drying device further comprises an upper air exhaust plate and a lower air exhaust plate.

5. The tunnel-type coated pole piece drying apparatus according to claim 4, wherein The upper air exhaust plate is arranged above the drying conveying channel, and the lower air exhaust plate is arranged below the drying conveying channel.

6. The tunnel-type coated pole piece drying apparatus according to claim 4, wherein The upper air exhaust plate is provided with an upper air exhaust area along both sides of the conveying direction of the drying conveying channel, and the lower air exhaust plate is provided with a lower air exhaust area along both sides of the conveying direction of the drying conveying channel.

7. The tunnel-type coated pole piece drying apparatus according to claim 5, wherein The first air knife bodies are fixedly installed on one side of the upper air exhaust plate adjacent to the pole piece, and the second air knife bodies are fixedly installed on one side of the lower air exhaust plate adjacent to the pole piece.

8. The tunnel-type coated pole piece drying apparatus according to claim 1, wherein The upper air exhaust area is provided with a plurality of first air exhaust openings, and the lower air exhaust area is provided with a plurality of second air exhaust openings.

9. The tunnel-type coated pole piece drying apparatus according to claim 4, wherein The box is further provided with an observation opening communicating with the drying conveying channel.

10. A tunnel type coating pole piece drying apparatus, characterized by, The tunnel type coated pole piece drying device further comprises a rotating support assembly. The tunnel type coated pole piece drying device comprises the tunnel type coated pole piece drying device.

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