Pole piece drying device and battery production equipment

Abstract

The utility model discloses a pole piece drying device and battery production equipment. The pole piece drying device comprises a laser mechanism and an infrared mechanism, wherein the laser mechanism is used for heating a pole piece to a set temperature; and the infrared mechanism is arranged at the downstream of the laser mechanism, the infrared mechanism comprises two infrared plates, the two infrared plates are oppositely arranged at an interval, a material passing gap for the pole piece to pass through is defined between the two infrared plates, and each infrared plate can emit infrared light towards the pole piece. According to the pole piece drying device, rapid heating is conducted through the laser mechanism, continuous heat preservation is conducted through the infrared mechanism, and therefore the pole piece drying treatment time can be greatly shortened, and the pole piece production efficiency is greatly improved.

Description

Technical Field

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

[0002] New energy lithium batteries are mainly composed of a shell and a battery cell arranged in the shell. The battery cell is formed by winding or stacking positive and negative electrode sheets. Among them, the electrode sheet plays a key role in the various performances of the battery and directly determines the quality of the battery. In the production process of the electrode sheet, the electrode sheet needs to be dried to reduce the moisture content of the electrode sheet to within the process requirements.

[0003] At present, the electrode drying technology mainly places the electrode in an oven, heats the air in the oven through a heat source, and blows hot air to the surface of the electrode through a fan to accelerate the evaporation of water in the electrode. However, this hot air drying technology is often inefficient, and the entire drying process takes dozens of hours, which seriously affects the production efficiency of the battery. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a pole piece drying device, which uses a laser mechanism to quickly heat and an infrared mechanism to continuously keep warm, thereby greatly shortening the pole piece drying process time and greatly improving the pole piece production efficiency.

[0005] The utility model also provides a battery production device having the above-mentioned electrode drying device.

[0006] According to the first embodiment of the present invention, the electrode drying device comprises:

[0007] A laser mechanism, wherein the laser mechanism is used to heat the pole piece to a set temperature;

[0008] An infrared mechanism is arranged downstream of the laser mechanism, and comprises two infrared plates, which are arranged opposite to each other with a gap defined between the two infrared plates for the pole piece to pass through, and each infrared plate can emit infrared light toward the pole piece.

[0009] The electrode drying device according to the embodiment of the utility model has at least the following beneficial effects:

[0010] The pole piece drying device of the present application uses a laser mechanism to perform rapid heating and an infrared mechanism to perform continuous heat preservation, thereby greatly shortening the time of pole piece drying treatment and greatly improving the production efficiency of pole pieces. In addition, since both laser and infrared have good penetrability, it can ensure that the temperature difference between the inside and outside of the pole piece during the heating and heat preservation process is small, thereby avoiding defects such as cracks and wrinkles. According to some embodiments of the utility model, the laser mechanism is arranged on one side of the pole piece, and the laser mechanism includes a plurality of lasers that emit lasers toward the pole piece, and the irradiation areas of each of the lasers are connected to form a heating area that matches the size of the pole piece.

[0011] According to some embodiments of the utility model, the electrode sheet drying device includes a plurality of the infrared mechanisms, each of the infrared mechanisms is arranged in parallel, and the electrode sheet passes through each of the infrared mechanisms in sequence.

[0012] According to some embodiments of the utility model, the pole piece drying device also includes an adjusting mechanism, which includes a sliding block and a sliding rail that are slidably connected, the sliding block is fixedly connected to the laser mechanism, and the length direction of the sliding rail is perpendicular to the surface of the pole piece to adjust the distance from the laser mechanism to the pole piece.

[0013] According to some embodiments of the utility model, the electrode drying device also includes a cooling mechanism, which is arranged downstream of the infrared mechanism and is used to cool the electrode.

[0014] According to some embodiments of the utility model, the cooling mechanism includes at least one water-cooled roller, the interior of the water-cooled roller defines a cavity for circulating cooling water, and the outer periphery of the water-cooled roller is used to abut the pole piece to perform heat exchange through the water-cooled roller.

[0015] According to some embodiments of the utility model, the cooling mechanism includes two groups of water-cooling components, each group of the water-cooling components includes a plurality of water-cooling rollers arranged in parallel along a first direction, the two groups of the water-cooling components are arranged in sequence along a second direction, and there is a gap between adjacent water-cooling rollers in each group of the water-cooling components, and the water-cooling rollers of one group are arranged corresponding to the gaps of the other group, so that the pole pieces are staggeredly connected to the water-cooling rollers of the two groups of the water-cooling components.

[0016] According to some embodiments of the utility model, the electrode sheet drying device also includes a floating mechanism, which includes two fixed rollers and a floating roller, and the floating roller is located between the two fixed rollers so that the electrode sheet passes through one of the fixed rollers, the floating roller and the other fixed roller in sequence, and the position of the floating roller relative to the two fixed rollers is adjustable so that the tension of the electrode sheet can be adjusted.

[0017] According to some embodiments of the utility model, the floating mechanism includes a base, the floating roller is rotatably connected to the base via a swing arm, and the swing arm can swing relative to the base so that the floating roller can move relative to the fixed roller.

[0018] According to the second aspect of the present invention, a battery production device includes:

[0019] A pole piece drying device as described in any one of the above embodiments;

[0020] A processing device is arranged downstream of the electrode sheet drying device, and is used to wind the electrode sheet into a wound battery cell, or to cut the electrode sheet into sheets and stack them into a laminated battery cell.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a schematic structural diagram of an electrode drying device according to an embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the structure of the laser mechanism and the infrared mechanism of the embodiment of the utility model;

[0025] Figure 3 for Figure 1 A magnified schematic diagram of the middle A area;

[0026] Figure 4 for Figure 1 A magnified schematic diagram of the middle B area;

[0027] Figure 5 It is a schematic diagram of the structure of the cooling mechanism of an embodiment of the utility model;

[0028] Figure 6 for Figure 1 Enlarged schematic diagram of the middle C area;

[0029] Figure 7 It is a schematic diagram of the structure of the floating roller in the embodiment of the utility model;

[0030] Figure 8 It is a structural schematic diagram of the dust removal mechanism in the embodiment of the utility model.

[0031] Reference numerals:

[0032] Laser mechanism 100;

[0033] Infrared mechanism 200; infrared plate 210; material gap 220;

[0034] Adjustment mechanism 300; Sliding block 310; Sliding rail 320;

[0035] Cooling mechanism 400; water-cooling roller 410; first water-cooling assembly 420; second water-cooling assembly 430;

[0036] Floating mechanism 500; fixed roller 510; floating roller 520; swing arm 521; base 522; driving motor 523;

[0037] Dust removal mechanism 600; roller brush 610; housing 620; dust suction duct 630;

[0038] Pole piece 700;

[0039] Unwinding mechanism 800; Rewinding mechanism 850. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, 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 invention 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 cannot be understood as a limitation on the present invention.

[0042] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0044] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0045] In traditional hot air drying, heat is transferred to the surface of the electrode through thermal convection and heat conduction, which increases its surface temperature. When a temperature difference is formed between the surface and the inside of the electrode, the heat will be transferred to the inside of the electrode along the temperature gradient. On the one hand, this drying technology is inefficient, and the entire drying process takes dozens of hours, which seriously affects the production efficiency of the battery. On the other hand, during the drying process, the drying speed of the surface and the inside of the electrode is inconsistent, which can easily lead to defects such as cracks and wrinkles on the surface of the electrode, and even the surface of the electrode may be scorched due to excessive temperature, affecting the drying quality.

[0046] To solve the above problems, the present application proposes a pole piece drying device, which includes a laser mechanism 100 and an infrared mechanism 200. It should be noted that the laser mechanism 100 is mainly used to heat the pole piece 700 to a set temperature. Since the laser has the advantages of good penetration and high energy density, it can achieve rapid heating of the pole piece 700, and the temperature difference between the surface and the inside of the pole piece 700 is small.

[0047] The infrared mechanism 200 is arranged downstream of the laser mechanism 100. The infrared mechanism 200 is mainly used to keep the pole piece 700 warm. It is understandable that due to the high laser energy density, long-term irradiation can easily cause the pole piece 700 to burn. For this reason, after the laser mechanism 100 heats the pole piece 700 to the set temperature, it is transmitted to the infrared mechanism 200 for heat preservation. The energy density of infrared light is weaker than that of laser, but it still has better penetration than hot air heating, which can ensure that the temperature difference between the inside and outside of the pole piece 700 remains consistent.

[0048] like Figure 1As shown, the pole piece 700 is a coil, which is unrolled by the unwinding mechanism 800 to form a material strip, and the pole piece material strip is sequentially connected to the laser mechanism 100, the infrared mechanism 200, etc. for processing, and finally rewound into a coil by the rewinding mechanism 850. Therefore, the time that the pole piece 700 is located in the laser mechanism 100 and the infrared mechanism 200 can be adjusted by adjusting the moving speed of the material strip, so as to achieve the regulation of the drying temperature and the drying effect. For example, when the pole piece 700 passes through the laser mechanism 100, it is kept for 0.1 to 0.6 seconds to quickly heat up to 200°C. Then it passes through the infrared mechanism 200 and is kept in the infrared mechanism 200 for 3 to 10 seconds, so that the moisture in the pole piece 700 can be fully volatilized, and the whole drying process is faster. It can be understood that the set temperature can be adjusted according to the different material systems of the coating layer, the current collector, etc. on the pole piece 700. In other embodiments, the pole piece 700 can also be a sheet, which is transmitted between various mechanisms through a conveyor belt.

[0049] Specifically, Figures 1 to 3 As shown, the infrared mechanism 200 includes two infrared plates 210, which are arranged opposite to each other, and the two infrared plates 210 are arranged at intervals, and the gap between the two infrared plates 210 is set as a material gap 220, and the pole piece 700 is passed through the infrared mechanism 200 through the material gap 220. It can be understood that since the coating layer to be dried is provided on both sides of the pole piece 700, when the pole piece 700 is passed through the infrared mechanism 200, the infrared plates 210 located on both sides of the pole piece 700 can emit infrared light, thereby respectively keeping the coating layers on the two sides of the pole piece 700 warm to promote the evaporation of water in the coating layer.

[0050] It should be emphasized that in the present application, the infrared mechanism 200 uses an infrared plate 210 as an infrared light generator. Compared with the use of an infrared lamp as an infrared light generator in the related art, the infrared plate 210 is a surface light source, and the infrared light emitted is emitted perpendicular to the plate surface of the infrared plate 210. The light intensity of each point on the pole piece 700 is relatively consistent, and the drying effect is better. If an infrared lamp is used as an infrared generator, the infrared lamp is a point light source, and the infrared light emitted is diffused, so that the light intensity at the position closest to the infrared lamp on the pole piece 700 is higher, and the light intensity at the position farthest from the infrared lamp is lower, which easily leads to inconsistent drying speed of the pole piece 700.

[0051] Based on the above, the electrode drying device of the present application uses the laser mechanism 100 for rapid heating and the infrared mechanism 200 for continuous heat preservation, thereby greatly shortening the drying time of the electrode 700 and greatly improving the production efficiency of the electrode 700. In addition, since the penetration of laser and infrared is good, it can ensure that the temperature difference between the inside and outside of the electrode 700 during the heating and heat preservation process is small, thereby avoiding defects such as cracks and wrinkles.

[0052] In some embodiments, the laser mechanism 100 is disposed on one side of the pole piece 700. The laser mechanism 100 includes a plurality of lasers, which can emit laser light toward the pole piece 700. The lasers are arranged in a set order and position so that the irradiation areas of the lasers are connected to form a whole heating area, and the size of the heating area matches the size of the pole piece 700. Figure 1 Taking the pole piece 700 shown as a coil as an example, the size requirements of the heating area are different depending on the heating object. If the drying object is the entire pole piece 700, the purpose is to reduce the water content on the surface and inside of the pole piece 700, then the width of the heating area should not be less than the width of the pole piece 700; if the drying object is the coating area on the pole piece 700, the purpose is to heat and dry the slurry, then the width of the heating area should not be less than the width of the coating area. The length of the heating area depends on the length of the designed insulation time. The longer the preset insulation time, the longer the length of the heating area should be, and the shorter the preset insulation time, the shorter the length of the heating area should be.

[0053] It should be explained that, due to the high energy density of the laser, laser irradiation on one side of the pole piece 700 can also achieve heating of the entire pole piece 700. It is understandable that in other embodiments, lasers can be provided on both sides of the pole piece 700 for heating.

[0054] It should be noted that the laser can adopt a vertical cavity surface emitting laser (Vertical-Cavity Surface-Emitting Laser, referred to as vcsel laser). The vcsel laser is a semiconductor laser. The light emitting direction of the laser is perpendicular to the chip, and the divergence angle of the laser is small. Therefore, the light beam of the vcsel laser is more concentrated, and the light emitting area is basically equal to the irradiation area projected on the pole piece 700. When the distance from the laser to the pole piece 700 changes within a certain range, the effect on the heating area is not significant. Overall, the laser mechanism 100 has a simple structure and is easy to use.

[0055] In some embodiments, the electrode drying device includes a plurality of infrared mechanisms 200, each of which is arranged in parallel. Figure 1 and Figure 2 As shown, it can be understood that the infrared heat preservation time during the drying process of the pole piece 700 is longer than the laser heating time, so the overall length of the infrared mechanism 200 should be greater than the overall length of the laser mechanism 100. In order to avoid a single infrared mechanism 200 being too long and affecting the spatial arrangement of the equipment, multiple infrared mechanisms 200 are provided, and the length of a single infrared mechanism 200 is shortened by providing multiple parallel infrared mechanisms 200.

[0056] For example, Figure 2 Taking the embodiment shown as an example, Figure 2 There are two infrared mechanisms 200, each of which is vertically arranged and arranged in parallel in the horizontal direction, so as to avoid the overall height of the device. It is understandable that the pole piece 700 moves from bottom to top in the infrared mechanism 200 on the left, and after turning through the two roller assemblies above, the pole piece 700 moves from top to bottom in the infrared mechanism 200 on the right. It is understandable that when multiple infrared mechanisms 200 are provided, the conveying directions of the pole pieces 700 in two adjacent infrared mechanisms 200 are opposite, and the overall structure is serpentine, so that after output from one infrared mechanism 200, it can enter the next infrared mechanism 200 quickly to avoid heat loss when switching the infrared mechanism 200.

[0057] In some embodiments, the drying device further includes an adjustment mechanism 300, and the adjustment mechanism 300 includes a slider 310 and a slide rail 320. Figure 1 and Figure 4 As shown, the slider 310 and the slide rail 320 are slidably connected, and the slider 310 is fixedly connected to the laser mechanism 100, so that the laser mechanism 100 is slidably connected to the slide rail 320. The pole piece drying device has a frame, and the slide rail 320 is fixedly connected to the frame, and the length direction of the slide rail 320 is perpendicular to the surface of the pole piece 700, so that when the laser mechanism 100 slides relative to the frame, it can be used to adjust the distance from the laser mechanism 100 to the pole piece 700.

[0058] In some embodiments, the electrode drying device further includes a cooling mechanism 400, such as Figure 1 As shown, the cooling mechanism 400 is arranged downstream of the infrared mechanism 200, and is used to cool the electrode 700, so that the subsequent winding mechanism 850 can wind the electrode 700 into a coil, and avoid the residual high temperature of the electrode 700 causing the local temperature of the coil to be too high and cause damage. Furthermore, the cooling mechanism 400 of the present application adopts a water cooling design. Figure 5 As shown, the cooling mechanism 400 includes at least one water-cooled roller 410. The water-cooled roller 410 defines a cavity inside. The cavity extends in the axial direction and defines a water inlet and outlet on the cavity wall. The cavity is used to circulate cooling water. The pole piece 700 can be wrapped around the outer periphery of the water-cooled roller 410, that is, the outer periphery of the water-cooled roller 410 is against the pole piece 700, so that the high-temperature pole piece 700 exchanges heat with the low-temperature cooling water through the water-cooled roller 410.

[0059] Furthermore, the cooling mechanism 400 includes two groups of water cooling components, each group of water cooling components includes a plurality of water cooling rollers 410 arranged in parallel along the first direction, and the two groups of water cooling components are arranged in sequence along the second direction. Furthermore, the two groups of water cooling components are arranged in an alternating manner. Specifically, Figure 5As shown, in each group of water-cooling components, there is a gap between adjacent water-cooling rollers 410, wherein the water-cooling rollers 410 of one group of water-cooling components are arranged corresponding to the gaps of another group of water-cooling components, and the pole pieces 700 are staggeredly connected to the water-cooling rollers 410 of the two water-cooling components. Figure 6 The water-cooling assembly on the upper side is named as the first water-cooling assembly 420, and the water-cooling assembly on the lower side is named as the second water-cooling assembly 430. The pole piece 700 is connected to the leftmost water-cooling roller 410 of the second water-cooling assembly 430 from top to bottom, and then connected to the leftmost water-cooling roller 410 of the first water-cooling assembly 420 from bottom to top, and then connected to the middle water-cooling roller 410 of the second water-cooling assembly 430, the rightmost water-cooling roller 410 of the first water-cooling assembly 420, and the rightmost water-cooling roller 410 of the second water-cooling assembly 430 in sequence. The advantage of this staggered arrangement is that there is a large contact area between the pole piece 700 and the water-cooling roller 410, and the water-cooling rollers 410 of the entire cooling mechanism 400 are arranged more compactly and occupy less space.

[0060] In some embodiments, the electrode sheet drying device also includes a floating mechanism 500, which includes two fixed rollers 510 and a floating roller 520. The floating roller 520 is located between the two fixed rollers 510, so that the electrode sheet 700 passes through one of the fixed rollers 510, the floating roller 520 and the other fixed roller 510 in sequence. The position of the floating roller 520 relative to the two fixed rollers 510 can be adjusted, so that the tension of the electrode sheet 700 can be adjusted.

[0061] Specifically, Figure 1 and Figure 7 As shown, the floating mechanism 500 includes a base 522, and the floating roller 520 is connected to the base 522 through a swing arm 521. The swing arm is connected to a drive motor 523, and the drive motor 523 can drive the swing arm 521 to swing relative to the base 522, so that the floating roller 520 can move relative to the fixed roller 510.

[0062] In some embodiments, Figure 1 As shown, the electrode drying device also includes a dust removal mechanism 600, which includes two roller brushes 610 arranged opposite to each other, and the electrode 700 can pass between the two roller brushes 610, so that the roller brushes 610 can clean the dust attached to the surface of the electrode 700. Further, the dust removal mechanism 600 is also provided with a shell 620, and the two roller brushes 610 are arranged in the shell 620, and the shell 620 is provided with an opening for the electrode 700 to pass through, as shown in FIG. Figure 8 The structure diagram of the single-side housing 620 and the single-side rolling brush 610 is shown. The housing 620 is also connected to a dust collecting pipe 630. After the rolling brush 610 sweeps the dust on the surface of the pole piece 700, the dust collecting pipe 630 discharges the dust in time.

[0063] The embodiment of the second aspect of the present application also proposes a battery production equipment, which includes a processing device and a pole piece drying device mentioned in any of the above embodiments, and the processing device is arranged downstream of the pole piece drying device. If the battery production equipment produces cylindrical batteries, the processing device is used to wind the pole piece 700 to form a wound battery cell, and finally assemble it into a cylindrical battery through a shelling device, a welding device, etc. If the battery manufacturer's equipment produces square laminated batteries, the processing device is used to cut the pole piece 700 into sheets, and then stack them to form laminated batteries, and then form batteries through shelling, liquid injection, formation and other processes.

[0064] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. The electrode drying device is characterized in that: include: A laser mechanism (100), wherein the laser mechanism (100) is used to heat the pole piece (700) to a set temperature; An infrared mechanism (200) is arranged downstream of the laser mechanism (100), and the infrared mechanism (200) comprises two infrared plates (210). The two infrared plates (210) are arranged opposite to each other at a distance, and a material passing gap (220) for the pole piece (700) to pass through is defined between the two infrared plates (210). Each infrared plate (210) can emit infrared light toward the pole piece (700).

2. The electrode drying device according to claim 1, characterized in that: The laser mechanism (100) is arranged on one side of the pole piece (700), and comprises a plurality of lasers that emit laser light toward the pole piece (700), wherein irradiation areas of the respective lasers are connected to form a heating area that matches the size of the pole piece (700).

3. The electrode drying device according to claim 1, characterized in that: The electrode sheet drying device comprises a plurality of infrared mechanisms (200), each of the infrared mechanisms (200) is arranged in parallel, and the electrode sheet (700) passes through each of the infrared mechanisms (200) in sequence.

4. The electrode drying device according to claim 1, characterized in that: The pole piece drying device also includes an adjustment mechanism (300), the adjustment mechanism (300) including a sliding block (310) and a sliding rail (320) that are slidably connected, the sliding block (310) being fixedly connected to the laser mechanism (100), and the length direction of the sliding rail (320) being perpendicular to the surface of the pole piece (700) so as to adjust the distance from the laser mechanism (100) to the pole piece (700).

5. The electrode drying device according to claim 1, characterized in that: The electrode drying device further comprises a cooling mechanism (400), wherein the cooling mechanism (400) is arranged downstream of the infrared mechanism (200) and is used for performing a temperature reduction treatment on the electrode (700).

6. The electrode drying device according to claim 5, characterized in that: The cooling mechanism (400) includes at least one water-cooled roller (410), the interior of the water-cooled roller (410) defines a cavity for circulating cooling water, and the outer periphery of the water-cooled roller (410) is used to abut against the pole piece (700) to perform heat exchange through the water-cooled roller (410).

7. The electrode drying device according to claim 6, characterized in that: The cooling mechanism (400) includes two groups of water-cooling components, each group of the water-cooling components includes a plurality of water-cooling rollers (410) arranged in parallel along a first direction, the two groups of the water-cooling components are arranged in sequence along a second direction, and there is a gap between adjacent water-cooling rollers (410) in each group of the water-cooling components, and the water-cooling rollers (410) of one group are arranged corresponding to the gaps of the other group, so that the pole pieces (700) are staggeredly connected to the water-cooling rollers (410) of the two groups of the water-cooling components.

8. The electrode drying device according to claim 1, characterized in that: The electrode sheet drying device further comprises a floating mechanism (500), wherein the floating mechanism (500) comprises two fixed rollers (510) and a floating roller (520), wherein the floating roller (520) is located between the two fixed rollers (510), so that the electrode sheet (700) passes through one of the fixed rollers (510), the floating roller (520) and the other fixed roller (510) in sequence, and the position of the floating roller (520) relative to the two fixed rollers (510) is adjustable, so that the tension of the electrode sheet (700) can be adjusted.

9. The electrode drying device according to claim 8, characterized in that: The floating mechanism (500) comprises a base (522), and the floating roller (520) is rotatably connected to the base (522) via a swing arm (521). The swing arm (521) can swing relative to the base (522) so that the floating roller (520) can move relative to the fixed roller (510).

10. Battery production equipment, characterized in that include: The electrode drying device according to any one of claims 1 to 9; A processing device is provided downstream of the electrode sheet drying device and is used for winding the electrode sheet (700) into a wound battery cell, or for cutting the electrode sheet (700) into sheets and stacking them into a laminated battery cell.

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