Battery pole piece dip-coating device and battery production line

Abstract

The utility model discloses a battery pole piece dip-coating device and a battery production line. Pre-dip-coating liquid is contained in a first trough, and battery slurry is contained in a second trough; the first rotary roller passing part is arranged in the first trough and is used for immersing the pole piece base body passing through the first trough into the pre-dip coating liquid; the second rotary roller passing part is arranged in the second material groove and is used for immersing the pole piece base body passing through the second material groove into the battery slurry; the first air knife part is used for blowing redundant pre-dip coating liquid on the pole piece substrate discharged from the first trough; the second air knife part is used for blowing redundant battery slurry on the pole piece substrate discharged from the second trough; the scraper part is used for scraping the battery slurry on the pole piece substrate passing through the second trough; and the drying box is used for drying the pole piece base body discharged from the second trough. According to the dip-coating device, the novel lithium battery pole piece material is fully filled with the battery slurry, and the dip-coating uniformity of the battery slurry on the pole piece material is improved, so that the performance of a lithium battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a battery pole piece dipping device and a battery production line. Background Art

[0002] In the production and manufacturing process of lithium batteries, coating is the core process and the main process step that determines the performance of the battery. There is a new type of lithium battery pole piece material with a foam-like structure inside, also known as foam copper, which has good conductivity and ductility. Using this foam copper as the base material of lithium battery electrodes has obvious advantages.

[0003] The battery pole of traditional lithium batteries is made by coating the front and back of aluminum or copper foil with battery slurry using a coating machine. Since the pole material of the new lithium battery has a foam structure inside, the existing spraying process cannot evenly fill the foam copper with battery slurry.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In view of the problems pointed out in the background technology, the utility model provides a battery pole piece dipping device and a battery production line, so that the interior of the new lithium battery pole piece material is fully filled with battery slurry, the dipping uniformity of the battery slurry on the pole piece material is improved, and thus the performance of the lithium battery is improved.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0007] In some embodiments, a battery pole piece dipping device is provided, comprising:

[0008] A first material tank, in which the pre-dip coating liquid is contained;

[0009] A second material tank, in which battery slurry is contained;

[0010] A first rotating roller portion, which is disposed in the first material trough and is used to immerse the electrode substrate passing through the first material trough into the prepreg liquid;

[0011] A second rotating roller portion is disposed in the second material trough and is used to immerse the electrode substrate passing through the second material trough into the battery slurry;

[0012] A first air knife part, which is used to blow away the excess prepreg coating liquid on the pole piece substrate coming out of the first material trough;

[0013] A second air knife part, which is used to blow away the excess battery slurry on the electrode substrate coming out of the second material trough;

[0014] A scraper part, used for scraping the battery slurry on the electrode substrate passing through the second material trough;

[0015] A drying box is used to dry the electrode substrate coming out of the second material trough.

[0016] In some embodiments, the first rotating roller portion includes at least two rollers, and the at least two rollers are arranged at intervals along the length direction of the first material trough, so that the pole piece substrate extends a distance along the length direction of the first material trough to be immersed in the pre-preg liquid.

[0017] In some embodiments, the first wind knife portion is disposed above the first material trough, and the first wind knife portion includes two wind knives, a gap is formed between the two wind knives for the pole piece substrate to pass through, and the wind knives extend along the width direction of the pole piece substrate.

[0018] In some embodiments, the second rotating roller portion includes at least two rollers, and the at least two rollers are arranged at intervals along the length direction of the second material trough, so that the pole piece substrate extends a distance along the length direction of the second material trough to be immersed in the battery slurry.

[0019] In some embodiments, a first scraper is disposed above at least one of the rollers, and a gap is formed between the first scraper and the corresponding roller for the pole piece substrate to pass through;

[0020] A second scraper is arranged below at least one of the rollers, and a gap is formed between the second scraper and the corresponding roller for the pole piece substrate to pass through.

[0021] In some embodiments, the second wind knife portion is arranged near the top of the second material trough, and the second wind knife portion includes two wind knives, and a gap is formed between the two wind knives for the pole piece substrate to pass through, and the wind knives extend along the width direction of the pole piece substrate.

[0022] In some embodiments, the scraper portion includes a third scraper and a fourth scraper. Along the conveying direction of the pole piece substrate, the third scraper and the fourth scraper are arranged downstream of the second wind knife portion. The third scraper and the fourth scraper are arranged at intervals along the conveying direction of the pole piece substrate, and a gap is formed between the third scraper and the fourth scraper for the pole piece substrate to pass through.

[0023] In some embodiments, a drying chamber is provided in the drying box, a heating portion is provided on the inner wall of the drying chamber, an inlet and an outlet are provided on the drying box, and the electrode substrate passes through the inlet, the drying chamber and the outlet.

[0024] In some embodiments, an ultrasonic generating device is disposed in the first material trough and the second material trough.

[0025] In some embodiments, it also includes an unwinding mechanism and a rewinding mechanism. Along the conveying direction of the electrode substrate, the unwinding mechanism is arranged upstream of the first material trough, and the rewinding mechanism is arranged downstream of the drying box.

[0026] In some embodiments, a battery production line is provided, comprising the battery pole piece dipping apparatus as described above.

[0027] Compared with the prior art, the advantages and positive effects of the utility model are:

[0028] In the battery pole piece dipping device of the present application, the pole piece substrate passes through the first material trough and the second material trough in sequence. When the pole piece substrate passes through the first material trough, it is immersed in the pre-dip coating liquid under the action of the first rotating roller part, so that the pole piece substrate is fully in contact with the pre-dip coating liquid, and the excess pre-dip coating liquid on the pole piece substrate is blown off by the first wind knife part. When the pole piece substrate passes through the second material trough, it is immersed in the battery slurry under the action of the second rotating roller part, so that the pole piece substrate is fully in contact with the battery slurry, so that the inside and outside of the new pole piece substrate can be filled with battery slurry. The excess battery slurry on the pole piece substrate is blown off by the second wind knife part, and the battery slurry on the pole piece substrate is scraped off and flattened by the scraper part, and the pole piece substrate is dried by the drying box. Through the above process, the uniformity of the dip coating of the pole piece substrate is improved, thereby improving the quality of the battery pole piece and the performance of the battery.

[0029] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 A schematic diagram of a battery pole piece dipping device according to some embodiments;

[0032] Figure 2 is another schematic diagram of a battery pole piece dipping device according to some embodiments;

[0033] Figure 3 is another schematic diagram of a battery pole piece dipping device according to some embodiments;

[0034] Figure 4 is a schematic diagram of a rotating roller assembly according to some embodiments;

[0035] Figure 5 is a schematic diagram of an air knife according to some embodiments;

[0036] Figure 6 A schematic diagram of a rotating roller assembly and a first scraper according to some embodiments;

[0037] Figure 7 A schematic diagram of a rotating roller assembly and a second scraper according to some embodiments;

[0038] Figure 8 is a schematic diagram of a third scraper and a fourth scraper according to some embodiments;

[0039] Fig. 9 is a schematic diagram of a drying box according to some embodiments;

[0040] Fig.10 is another schematic diagram of a drying box according to some embodiments;

[0041] Reference numerals:

[0042] 10. Pole piece substrate;

[0043] 20. Shaft support;

[0044] 31. First guide roller; 32. Second guide roller; 33. Third guide roller; 34. Unwinding mechanism; 35. Rewinding mechanism;

[0045] 40. Install the substrate;

[0046] 50. Wind Knife;

[0047] 100. First trough;

[0048] 200, second trough;

[0049] 300, a first rotating roller portion;

[0050] 400, second rotating roller portion;

[0051] 500, first wind knife part; 510, first wind knife; 520, second wind knife;

[0052] 600, second wind knife; 610, third wind knife; 620, fourth wind knife;

[0053] 710, first scraper; 720, second scraper; 730, third scraper; 740, fourth scraper;

[0054] 800, drying box; 810, entrance; 820, exit; 830, drying chamber; 840, heating unit; 850, door body;

[0055] 910, first rotating roller assembly; 920, second rotating roller assembly; 930, third rotating roller assembly; 940, fourth rotating roller assembly; 950, fifth rotating roller assembly; 960, mounting bracket; 961, horizontal frame; 962, vertical frame; 970, roller. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0059] 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.

[0060] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0061] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0062] In some embodiments, a battery production line is provided, in particular a lithium battery production line. The battery pole piece of the lithium battery adopts a new type of pole piece material, which has a foam structure inside, also known as foam copper. The battery pole piece is made by dipping the battery slurry on the pole piece material through a dipping device.

[0063] In some embodiments, the battery pole piece dipping device refers to Figures 1 to 3 , which comprises a first material trough 100 , the top of which is open, and the first material trough 100 is filled with a pre-dip coating liquid.

[0064] The battery pole piece dipping device comprises a second material trough 200 , which is arranged adjacent to the first material trough 100 , the top of the second material trough 200 is open, and the second material trough 200 is filled with battery slurry.

[0065] The battery pole piece dipping device comprises a first rotating roller unit 300, which is arranged in the first material tank 100. The first rotating roller unit 300 allows the pole piece substrate 10 passing through the first material tank 100 to be dipped into the pre-dip coating solution.

[0066] The first rotating roller portion 300 guides the movement of the pole piece substrate 10. The pole piece substrate 10 enters the first material trough 100 from above, passes through the first rotating roller portion 300, and the first rotating roller portion 300 immerses the pole piece substrate 10 in the pre-impregnated coating liquid to fully contact with the pre-impregnated coating liquid. Then the pole piece substrate 10 moves to the top of the first material trough 100 to continue to be transmitted to the downstream second material trough 200.

[0067] The battery pole piece dipping device comprises a second rotating roller unit 400, which is arranged in the second material tank 200. The second rotating roller unit 400 allows the pole piece substrate 10 passing through the second material tank 200 to be immersed in the battery slurry.

[0068] The second rotating roller portion 400 guides the movement of the pole piece substrate 10. The pole piece substrate 10 enters the second material trough 200 from above the second material trough 200, passes through the second rotating roller portion 400, and the second rotating roller portion 400 immerses the pole piece substrate 10 in the battery slurry to fully contact the battery slurry. Then the pole piece substrate 10 moves to the top of the second material trough 200 to continue to be transmitted downstream.

[0069] The battery pole piece dipping device comprises a first air knife unit 500 , which is used to blow away the excess pre-dip coating liquid on the pole piece substrate 10 coming out of the first material tank 100 .

[0070] In other words, the first air knife unit 500 is disposed on the transmission path of the electrode substrate 10 between the first material tank 100 and the second material tank 200. After the electrode substrate 10 comes out of the first material tank 100, the first air knife unit 500 blows away the excess pre-dip coating liquid on the electrode substrate 10.

[0071] The battery pole piece dipping device includes a second air knife unit 600 for blowing away excess battery slurry on the pole piece substrate 10 coming out of the second material tank 200 .

[0072] In other words, along the conveying direction of the electrode substrate 10 , the second air knife unit 600 is arranged downstream of the second material trough 200 . After the electrode substrate 10 comes out of the second material trough 200 , the second air knife unit 600 blows away the excess battery slurry on the electrode substrate 10 .

[0073] The battery pole piece dipping device includes a scraper part, which is used to scrape the battery slurry on the pole piece substrate 10 passing through the second material tank 200. The scraper part scrapes both sides of the pole piece substrate 10 to scrape off the excess battery slurry on the pole piece substrate 10 and flatten it.

[0074] The battery pole piece dipping device includes a drying box 800 , which is used to dry the pole piece substrate 10 coming out of the second material tank 200 .

[0075] In the battery pole piece dipping device of the present application, the pole piece substrate 10 passes through the first material trough 100 and the second material trough 200 in sequence. When the pole piece substrate 10 passes through the first material trough 100, it is immersed in the pre-dip coating liquid under the action of the first rotating roller part 300, so that the pole piece substrate 10 is fully in contact with the pre-dip coating liquid, and the excess pre-dip coating liquid on the pole piece substrate 10 is blown off by the first wind knife part 500. When the pole piece substrate 10 passes through the second material trough 200, it is immersed in the battery slurry under the action of the second rotating roller part 400, so that the pole piece substrate 10 is fully in contact with the battery slurry, so that the inside and outside of the new pole piece substrate 10 can be filled with battery slurry. The excess battery slurry on the pole piece substrate 10 is blown off by the second wind knife part 600, and the battery slurry on the pole piece substrate 10 is scraped off and flattened by the scraper part, and the pole piece substrate 10 is dried by the drying box 800. Through the above process, the dip-coating uniformity of the pole piece substrate 10 is improved, thereby improving the quality of the battery pole piece and improving the performance of the battery.

[0076] Figure 1 The front view of the battery pole piece dipping device is shown. Figure 2 The figure shows an axial view of a battery electrode dip coating device. Figure 3 The housings of the first trough 100 and the second trough 200 are omitted.

[0077] In some embodiments, reference Figure 3 The first rotating roller portion 300 includes at least two rollers 970, and the at least two rollers 970 are arranged at intervals along the length direction of the first material trough 100, so that the pole piece substrate 10 extends a distance along the length direction of the first material trough 100 to be immersed in the pre-dip coating liquid. The pole piece substrate 10 extends a distance in the first material trough 100, prolonging the contact area and contact time with the pre-dip coating liquid, thereby improving the dipping effect of the pre-dip coating liquid on the pole piece substrate 10.

[0078] Specifically, the first rotating roller unit 300 includes at least two rotating roller assemblies, each of which has the same structure, and each rotating roller assembly includes a roller 970. In this specific embodiment, the first rotating roller unit 300 includes two rotating roller assemblies, which are defined as a first rotating roller assembly 910 and a second rotating roller assembly 920 for ease of description.

[0079] Structural reference of rotating roller assembly Figure 4, including a mounting bracket 960, the mounting bracket 960 includes a horizontal frame 961 and a vertical frame 962, the vertical frames 962 are respectively arranged at the left and right ends of the horizontal frame 961, and the vertical frames 962 extend toward the bottom of the horizontal frame 961. One end of the horizontal frame 961 is fixedly mounted on the mounting base 40 through the shaft support 20. A roller 970 is rotatably arranged between the two vertical frames 962. The mounting bracket 960 extends into the interior of the first material trough 100 through the upper opening of the first material trough 100.

[0080] In some embodiments, reference Figure 3 The first rotating roller assembly 910 and the second rotating roller assembly 920 are spaced apart along the length direction of the first material trough 100, and the two rollers 970 are located above the pole piece substrate 10, so that the pole piece substrate 10 extends a certain distance along the length direction of the first material trough 100 in a horizontal posture and is immersed in the pre-preg coating liquid.

[0081] In some embodiments, the second rotating roller unit 400 includes at least two rollers 970, and the at least two rollers 970 are arranged at intervals along the length direction of the second material trough 200, so that the pole piece substrate 10 extends a distance along the length direction of the second material trough 200 to be immersed in the battery slurry. The pole piece substrate 10 extends a distance in the second material trough 200, prolonging the contact area and contact time with the battery slurry, so that the inside and outside of the pole piece substrate 10 are filled with battery slurry.

[0082] Specifically, the second rotating roller unit 400 includes at least two rotating roller assemblies, each of which includes a roller 970. In this specific embodiment, the second rotating roller unit 400 includes three rotating roller assemblies, which are defined as a third rotating roller assembly 930, a fourth rotating roller assembly 940, and a fifth rotating roller assembly 950 for ease of description. Figure 3 The third rotating roller assembly 930, the fourth rotating roller assembly 940 and the fifth rotating roller assembly 950 are arranged at intervals along the length direction of the second trough 200.

[0083] In some embodiments, reference Figure 2 and Figure 3 The first air knife part 500 is arranged above the first material trough 100 . After the pole piece substrate 10 comes out of the first material trough 100 , the first air knife part 500 blows the pole piece substrate 10 to blow away the excess pre-impregnation coating liquid on the pole piece substrate 10 .

[0084] The first wind knife unit 500 includes two wind knives, which are defined as a first wind knife 510 and a second wind knife 520. Each wind knife 50 is mounted on the mounting base 40 through the shaft support 20. Figure 5A gap is formed between the first wind knife 510 and the second wind knife 520 for the electrode substrate 10 to pass through. The wind knife 50 extends along the width direction of the electrode substrate 10 to blow a plane wind toward the electrode substrate 10 to sweep away the excess pre-dip coating liquid on both sides of the electrode substrate 10.

[0085] In some embodiments, the second air knife unit 600 is arranged near the top of the second material trough 200. After the pole piece substrate 10 comes out of the second material trough 200, the second air knife unit 600 blows the pole piece substrate 10 to blow away excess battery slurry on the pole piece substrate 10.

[0086] The second wind knife section 600 includes two wind knives, which are defined as a third wind knife 610 and a fourth wind knife 620 respectively. A gap is formed between the third wind knife 610 and the fourth wind knife 620 for the electrode substrate 10 to pass through. The wind knife 50 extends along the width direction of the electrode substrate 10 to blow plane wind toward the electrode substrate 10 to blow away excess battery slurry on the front and back sides of the electrode substrate 10.

[0087] In some embodiments, reference Figure 3 The scraper portion includes a first scraper 710. The first scraper 710 is disposed above at least one roller 970 in the second material trough 200, and a gap is formed between the first scraper 710 and the corresponding roller 970 for the pole piece substrate 10 to pass through. When the pole piece substrate 10 passes through the gap, the first scraper 710 scrapes the battery slurry on the upper surface of the pole piece substrate 10, so that the battery slurry is fully immersed in the inside of the pole piece substrate 10.

[0088] In this specific embodiment, refer to Figure 6 In the fourth rotating roller assembly 940, a first scraper 710 is disposed between two vertical frames 962, and the first scraper 710 is located above the roller 970. The first scraper 710 is disposed on the vertical frame 962 through the shaft support 20.

[0089] In some embodiments, reference Figure 3 The scraper portion includes a second scraper 720. The second scraper 720 is disposed below at least one roller 970 in the second material trough 200, and a gap is formed between the second scraper 720 and the corresponding roller 970 for the pole piece substrate 10 to pass through. When the pole piece substrate 10 passes through the gap, the second scraper 720 scrapes the battery slurry on the lower surface of the pole piece substrate 10, so that the battery slurry is fully immersed in the inside of the pole piece substrate 10.

[0090] In this specific embodiment, refer to Figure 7 In the fifth rotating roller assembly 950, a second scraper 720 is disposed between two vertical frames 962, and the second scraper 720 is located below the roller 970. The second scraper 720 is disposed on the vertical frame 962 through the shaft support 20.

[0091] In the second material trough 200 , the front and back sides of the pole piece substrate 10 are scraped by the first scraper 710 and the second scraper 720 , so that the battery slurry can fully enter the interior of the pole piece substrate 10 .

[0092] In some embodiments, reference Figure 3 and Figure 8 The scraper unit includes a third scraper 730 and a fourth scraper 740. The third scraper 730 and the fourth scraper 740 are arranged downstream of the second wind knife unit 600 along the conveying direction of the pole piece substrate 10. The third scraper 730 and the fourth scraper 740 are arranged at intervals along the conveying direction of the pole piece substrate 10, and a gap is formed between the third scraper 730 and the fourth scraper 740 for the pole piece substrate 10 to pass through. The third scraper 730 and the fourth scraper 740 are respectively installed on the mounting base 40 through the shaft support 20.

[0093] After the pole piece substrate 10 comes out of the second material tank 200, the third scraper 730 and the fourth scraper 740 scrape the excess battery slurry on both sides of the pole piece substrate 10 to further improve the uniformity of the battery slurry coating.

[0094] In some embodiments, along the conveying direction of the pole piece substrate 10 , the third scraper 730 and the fourth scraper 740 are located downstream of the second air knife unit 600 .

[0095] After the electrode substrate 10 comes out of the second material tank 200, it is first blown by the second air knife 600 to blow away the excess battery slurry, and then passes through the third scraper 730 and the fourth scraper 740 to flatten the battery slurry on both sides.

[0096] In some embodiments, along the conveying direction of the electrode substrate 10 , the drying box 800 is disposed downstream of the third scraper 730 and the fourth scraper 740 .

[0097] Reference Fig. 9 and Fig.10 A drying chamber 830 is provided in the drying box 800 , a heating portion 840 is provided on the inner wall of the drying chamber 830 , an inlet 810 and an outlet 820 are provided on the drying box 800 , and the electrode substrate 10 passes through the inlet 810 , the drying chamber 830 and the outlet 820 .

[0098] The heating part 840 is an infrared heating tube, and the heating part 840 increases the temperature in the drying chamber 830 . When the electrode substrate 10 passes through the drying chamber 830 , the electrode substrate 10 is dried.

[0099] Heating parts 840 are respectively arranged on the two opposite side walls of the drying chamber 830 to dry both sides of the electrode substrate 10 at the same time, thereby improving the drying efficiency.

[0100] An inlet 810 is disposed at the bottom of the drying box 800 , and an outlet 820 is disposed at the top of the drying box 800 . The inlet 810 , the drying chamber 830 , and the outlet 820 are vertically connected, and the electrode substrate 10 passes through the drying chamber 830 from bottom to top.

[0101] The drying box 800 includes a door body 850 , which is used to close or open the drying chamber 830 to facilitate replacement and maintenance of the heating part 840 .

[0102] In some embodiments, ultrasonic generators (not shown) are respectively disposed in the first material tank 100 and the second material tank 200 to generate ultrasonic vibrations during the dipping process so that the electrode substrate 10 is fully immersed in the pre-dip coating solution and the battery slurry.

[0103] In some embodiments, reference Figures 1 to 3 The first material trough 100 and the second material trough 200 are arranged in sequence, and the first guide roller 31 and the second guide roller 32 are arranged above the first material trough 100. The first guide roller 31 is arranged on one side of the first material trough 100, and the second guide roller 32 is arranged on the other side of the first material trough 100, and the second guide roller 32 is located in the middle position above the first material trough 100 and the second material trough 200.

[0104] The pole piece substrate 10 is guided by the first guide roller 31 and enters the first trough 100 downwards, and extends a distance along the length direction of the first trough 100 under the guidance of the first rotating roller assembly 910. After the pole piece substrate 10 comes out of the first trough 100, it enters the second trough 200 downwards under the guidance of the second guide roller 32, and extends a distance along the length direction of the second trough 200 under the guidance of the second rotating roller assembly 920. After the pole piece substrate 10 comes out of the second trough 200, it first passes through the second air knife 600 upwards, then passes through the third scraper 730 and the fourth scraper 740, and then continues to pass through the drying box 800 upwards.

[0105] A third guide roller 33 is disposed above the drying box 800 , and the electrode substrate 10 exiting from the outlet 820 of the drying box 800 is then transported downstream under the guidance of the third guide roller 33 .

[0106] In some embodiments, reference Figure 1 The battery pole piece dipping device further includes an unwinding mechanism 34, which is disposed upstream of the first material trough 100 along the conveying direction of the pole piece, specifically upstream of the first guide roller 31. The unwinding mechanism 34 is used for unwinding and tension control of the pole piece.

[0107] In some embodiments, reference Figure 1The battery pole piece dipping device further includes a winding mechanism 35, which is arranged downstream of the drying box 800 along the conveying direction of the pole piece, specifically, downstream of the third guide roller 33. The winding mechanism 35 is used for winding and tension control of the pole piece.

[0108] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0109] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by technicians familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A battery pole piece dipping device, characterized in that: include: A first material tank, in which the pre-dip coating liquid is contained; A second material tank, in which battery slurry is contained; A first rotating roller portion, which is disposed in the first material trough and is used to immerse the electrode substrate passing through the first material trough into the prepreg liquid; A second rotating roller portion is disposed in the second material trough and is used to immerse the electrode substrate passing through the second material trough into the battery slurry; A first air knife part, which is used to blow away the excess prepreg coating liquid on the pole piece substrate coming out of the first material trough; A second air knife part, which is used to blow away the excess battery slurry on the electrode substrate coming out of the second material trough; A scraper part, used for scraping the battery slurry on the electrode substrate passing through the second material trough; A drying box is used to dry the electrode substrate coming out of the second material trough.

2. The battery pole piece dipping device according to claim 1, characterized in that: The first rotating roller portion includes at least two rollers, and the at least two rollers are arranged at intervals along the length direction of the first material trough, so that the pole piece substrate extends a distance along the length direction of the first material trough to be immersed in the pre-preg coating liquid.

3. The battery pole piece dipping device according to claim 1, characterized in that: The first wind knife part is arranged near the top of the first material trough, and the first wind knife part includes two wind knives. A gap is formed between the two wind knives for the pole piece substrate to pass through, and the wind knives extend along the width direction of the pole piece substrate.

4. The battery pole piece dipping device according to claim 1, characterized in that: The second rotating roller portion includes at least two rollers, and the at least two rollers are arranged at intervals along the length direction of the second material trough, so that the pole piece substrate extends a distance along the length direction of the second material trough to be immersed in the battery slurry.

5. The battery pole piece dipping device according to claim 4, characterized in that: A first scraper is disposed above at least one of the rollers, and a gap is formed between the first scraper and the corresponding roller for the pole piece substrate to pass through; A second scraper is arranged below at least one of the rollers, and a gap is formed between the second scraper and the corresponding roller for the pole piece substrate to pass through.

6. The battery pole piece dipping device according to claim 1, characterized in that: The second air knife part is arranged near the top of the second material trough, and the second air knife part includes two air knives. A gap is formed between the two air knives for the pole piece substrate to pass through, and the air knives extend along the width direction of the pole piece substrate.

7. The battery pole piece dipping device according to claim 1, characterized in that: The scraper portion includes a third scraper and a fourth scraper. The third scraper and the fourth scraper are arranged downstream of the second wind knife portion along the conveying direction of the pole piece substrate. The third scraper and the fourth scraper are arranged at intervals along the conveying direction of the pole piece substrate, and a gap is formed between the third scraper and the fourth scraper for the pole piece substrate to pass through.

8. The battery pole piece dipping device according to any one of claims 1 to 7, characterized in that: A drying chamber is arranged in the drying box, a heating part is arranged on the inner wall of the drying chamber, an inlet and an outlet are arranged on the drying box, and the electrode substrate passes through the inlet, the drying chamber and the outlet.

9. The battery pole piece dipping device according to any one of claims 1 to 7, characterized in that: It also includes an unwinding mechanism and a rewinding mechanism. Along the conveying direction of the electrode substrate, the unwinding mechanism is arranged upstream of the first material trough, and the rewinding mechanism is arranged downstream of the drying box.

10. A battery production line, characterized in that: It comprises a battery pole piece dipping device as claimed in any one of claims 1 to 9.

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