Pole piece spraying device

Abstract

The application relates to the technical field of battery manufacturing, in particular to a pole piece spraying device. The pole piece spraying device at least comprises a spraying mechanism, at least part of the spraying mechanism can be arranged on the outer circumferential side of a pole piece; the spraying mechanism is configured to be movable around the pole piece, and / or the pole piece has a rotating axis arranged at an angle with the plane where the pole piece is located, and the pole piece is configured to be rotatable around the rotating axis; the spraying mechanism is used for spraying insulating paste to the edge of the pole piece during the relative movement between the spraying mechanism and the pole piece. The pole piece spraying device provided by the application can make the edge of the pole piece adhere to an insulating protective layer, thereby reducing burrs on the edge of the pole piece and increasing the use safety of the pole piece.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to an electrode coating apparatus. Background Technology

[0002] Currently, during the production of lithium-ion battery electrodes, after the cutting process, tiny burrs inevitably form at the edges of the electrodes. These burrs, due to their rough and irregular surfaces, readily attract and collect surrounding metallic dust. The presence of this metallic dust not only affects the cleanliness of the electrodes, but more importantly, during charge-discharge cycles, these dust-laden burrs significantly increase the likelihood of lithium plating at the edges. This exacerbation of lithium plating not only reduces the overall performance and lifespan of the battery but may also pose safety hazards, thus impacting the battery's stability and safety. Utility Model Content

[0003] Therefore, it is necessary to provide an electrode coating device that can attach an insulating protective layer to the edge of the electrode, thereby reducing burrs on the electrode edge and increasing the safety of the electrode in use.

[0004] An electrode coating apparatus includes at least a coating mechanism, at least a portion of which is disposed on the outer periphery of the electrode; the coating mechanism is configured to move around the electrode, and / or the electrode has a rotation axis angled to the plane of the electrode, the electrode being configured to rotate about the rotation axis; the coating mechanism is used to spray an insulating slurry onto the edge of the electrode during the relative movement between the coating mechanism and the electrode.

[0005] Understandably, an insulating slurry is sprayed onto the edges of the electrode using a spraying mechanism to create an insulating protective layer that covers the burrs generated during electrode cutting. During spraying, the spraying mechanism can move circumferentially around the electrode. The electrode can also rotate around an axis angled to its own plane to adjust the position of different parts of the electrode relative to the spraying mechanism. This setup not only facilitates adjusting the target spraying position according to actual needs, improving flexibility, but also allows for edge spraying at various locations circumferentially, not limited to a single direction, thus increasing the spraying range and facilitating the formation of a uniform and comprehensive insulating protective layer at the electrode edges. This reduces metal dust adhering to the electrode edges, thereby reducing the risk of lithium plating in the edge areas and improving the overall battery performance.

[0006] In some embodiments, the axis of rotation is perpendicular to the plane in which the electrode is located.

[0007] In some embodiments, the electrode coating apparatus further includes a material box and a rotating mechanism, the rotating mechanism being connected to the material box and used to drive the material box to rotate about the rotation axis, the material box having a storage cavity for storing electrodes and a side opening communicating with the storage cavity, the edge of the electrode being exposed at the side opening.

[0008] In some embodiments, the material box includes a plurality of baffles, and at least one of the material box and the rotating mechanism includes a supporting base plate. The plurality of baffles are spaced apart on the supporting base plate around the rotation axis, and a side opening is provided between any two adjacent baffles.

[0009] In some embodiments, a plurality of the baffles are movably disposed on the supporting base plate.

[0010] In some embodiments, the support base plate is provided with a slide groove arranged around the rotation axis, and a plurality of baffles are inserted in the slide groove at intervals, each baffle being movable along the slide groove.

[0011] In some embodiments, the spraying mechanism is located on the outer periphery of the material box, and / or the rotating mechanism is connected to the bottom of the material box.

[0012] In some embodiments, the spraying mechanism includes a slurry box, a nozzle, and a discharge pipe, with the nozzle communicating with the slurry box via the discharge pipe.

[0013] In some embodiments, the spraying mechanism further includes a mounting base and a movable adjustment plate disposed on the mounting base, the nozzle being disposed on the adjustment plate, the adjustment plate being movable relative to the mounting base to adjust the installation height and / or angle of the nozzle.

[0014] In some embodiments, the electrode coating apparatus further includes a purging mechanism connected to the nozzle and used to provide cold air to the nozzle; and / or, the electrode coating apparatus further includes a drying mechanism connected to the nozzle and used to provide hot air to the nozzle.

[0015] In some embodiments, the nozzle includes a plurality of spaced-apart and independent working channels, one of which is connected to the discharge pipe;

[0016] One of the working channels is connected to the purging mechanism via a first air pipe, and / or, another of the working channels is connected to the drying mechanism via a second air pipe.

[0017] In some embodiments, the electrode coating apparatus further includes a pressure mechanism for pressing down and fixing the electrode.

[0018] In some embodiments, the pressure mechanism is configured to rotate synchronously with the electrode.

[0019] In some embodiments, the pressure mechanism includes at least a pressure plate disposed above the electrode, the pressure plate being movable reciprocating along the stacking direction of the electrode and fixing the electrode when pressed down.

[0020] In some embodiments, the pressure mechanism further includes a pressure power source and a transmission rod, the pressure power source being connected to one end of the transmission rod and the pressure plate being connected to the other end of the transmission rod. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an electrode coating apparatus provided in one embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the material box in an electrode coating apparatus provided in an embodiment of this application;

[0024] Figure 3 This is a partial simplified diagram of an electrode coating apparatus provided in an embodiment of this application;

[0025] Figure 4 This is a simplified diagram of the nozzle in an electrode coating apparatus provided in an embodiment of this application.

[0026] Reference numerals: 110, Spraying mechanism; 111, Slurry box; 112, Nozzle; 113, Discharge pipe; 114, Mounting base; 115, Adjusting plate; 120, Material box; 121, Baffle; 122, Support base plate; 130, Rotating mechanism; 140, Blowing mechanism; 141, First air pipe; 150, Drying mechanism; 151, Second air pipe; 160, Pressure mechanism; 161, Pressure plate; 162, Transmission rod; 163 170. Pressurized power source; 200. Mounting base; 1120. Electrode; 1120. Working channel; 1120a. First working channel; 1120b. Second working channel; 1120c. Third working channel; 1201. Storage cavity; 1202. Side opening; 1211. First baffle; 1212. Second baffle; 1213. Limiting block; 1220. Slide groove; 1220a. First slide groove; 1220b. Second slide groove. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] It should be noted that when a component is referred to as being "fixed to" or "attached to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

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

[0032] Please see Figure 1 One embodiment of this application provides an electrode coating apparatus that can attach an insulating protective layer to the edge of an electrode 200, thereby reducing the impact of burrs on the edge of the electrode 200 and increasing the safety of the electrode 200 in use. Specifically, the electrode coating apparatus includes at least a coating mechanism 110, at least a portion of which can be disposed on the outer periphery of the electrode 200. The coating mechanism 110 is configured to move around the electrode 200, and is used to spray an insulating slurry onto the edge of the electrode 200 during the relative movement of the coating mechanism 110 and the electrode 200.

[0033] In other words, because the spraying mechanism 110 can move circumferentially around the electrode 200, the spraying position of various locations on the circumference of the electrode 200 relative to the spraying mechanism 110 can be adjusted. Then, the spraying mechanism 110 sprays insulating slurry onto the edge of the electrode 200, so that an insulating protective layer adheres to the edge of the electrode 200. This insulating protective layer can cover the burrs generated during the cutting of the electrode 200, thereby reducing the adsorption or contamination of metal dust on the edge of the electrode 200, lowering the possibility of lithium plating in the edge area, and improving the safety of the electrode 200 in use. Moreover, the circumferential movement of the spraying mechanism 110 relative to the electrode 200 facilitates the adjustment of the target spraying position according to actual needs, improving flexibility. Furthermore, this configuration allows for edge spraying at various locations on the circumference of the electrode 200, not limited to spraying in a single direction, thus increasing the spraying range and facilitating the formation of a uniform and comprehensive insulating protective layer on the edge of the electrode 200. In addition, the position of the electrode 200 can be kept stable during the spraying process. Only the spraying mechanism 110 needs to be adjusted according to the edge of the electrode 200, which improves the protection of the electrode 200 during the spraying process.

[0034] Among them, the electrode 200 has a central axis, and the spraying mechanism 110 can move relative to the electrode 200 around the central axis of the electrode 200.

[0035] In an alternative embodiment, at least a portion of the spraying mechanism 110 may be disposed on the outer periphery of the electrode 200. In this case, the electrode 200 has a rotation axis S that is angled to the plane in which the electrode is located, and the electrode 200 is configured to rotate about the rotation axis S. The plane in which the electrode is located may refer to the two-dimensional plane of the electrode 200 itself, or it may be a virtual two-dimensional plane that coincides with the electrode 200.

[0036] Taking the horizontal placement of electrode 200 as an example, the plane on which the electrode 200 is located is the horizontal plane on which the electrode 200 is located. The spraying mechanism 110 can be located on the front, rear, left, or right side of the electrode 200, etc., as illustrated here. The electrode 200 has a vertical direction (that is, the electrode stacking direction, i.e., ...) Figure 1 The central axis extending in the vertical direction (as described above) is the aforementioned rotation axis S, which is perpendicular to the plane where the electrode is located. The electrode 200 can rotate around the rotation axis S under external force, allowing one of its front, rear, left, or right edges to align with the spraying mechanism 110. This enables positional adjustment of the electrode 200 relative to the spraying mechanism 110 in different circumferential directions, satisfying the spraying requirements at its edges in different directions. Furthermore, because the rotation axis S is perpendicular to the plane where the electrode is located, the vertical height of each edge of the electrode 200 remains essentially consistent during rotation. Therefore, regardless of which side the spraying mechanism 110 is located on, the same height can be maintained to achieve edge spraying of the electrode 200. Of course, the rotation axis S may not be perpendicular to the plane where the electrode is located; this is merely an example.

[0037] In another alternative embodiment, at least a portion of the spraying mechanism 110 can be disposed on the outer periphery of the electrode 200. The spraying mechanism 110 is configured to move around the electrode 200, and the electrode 200 has a rotation axis S angled to the plane of the electrode, and is configured to rotate about the rotation axis S. That is, by utilizing the relative movement between the spraying mechanism 110 and the electrode 200, not only can spraying at the edges of the electrode 200 in different directions be satisfied, but spraying efficiency can also be improved. In this case, the rotation axis S of the electrode 200 is perpendicular to the plane of the electrode, and the spraying mechanism 110 moves relative to the electrode 200 about the rotation axis S.

[0038] Please see Figure 1 and Figure 2In some embodiments, the electrode coating apparatus further includes a material box 120 and a rotating mechanism 130. The rotating mechanism 130 is connected to the material box 120 and is used to drive the material box 120 to rotate about the rotation axis S. The material box 120 has a storage cavity 1201 for storing the electrode 200 and a side opening 1202 communicating with the storage cavity 1201. The edge of the electrode 200 is exposed at the side opening 1202. Taking the electrode 200 as a rectangle and placed horizontally as an example, multiple electrodes 200 are stacked in the storage cavity 1201 along the vertical direction Z. The edge of the electrode 200 is exposed through the side opening 1202, which facilitates the coating mechanism 110 to spray insulating paste onto the edge of the electrode 200. The rotating mechanism 130 drives the material box 120 to rotate around the rotation axis S. The material box 120 drives the electrode 200 in the storage cavity 1201 to rotate synchronously, so that the edges of the electrode 200 in different directions can correspond to the spraying mechanism 110, realizing spraying at the edges in different directions. This setting can not only achieve simultaneous spraying of multiple electrode 200s in a single operation, but also eliminates the need to directly drive the electrode 200, thus improving the protection of the electrode 200.

[0039] In some embodiments, the material box 120 includes a plurality of baffles 121, and at least one of the material box 120 and the rotating mechanism 130 includes a supporting base plate 122. The plurality of baffles 121 are spaced apart on the supporting base plate 122 around the rotation axis S, and a side opening 1202 is provided between any two adjacent baffles 121.

[0040] Taking the material box 120, which includes a supporting base plate 122 and multiple baffles 121, as an example, the multiple baffles 121 and the supporting base plate 122 together form the storage cavity 1201 of the material box 120. Multiple electrode sheets 200 are supported by the supporting base plate 122 and are side-limited by the multiple baffles 121. The supporting base plate 122 can be connected to the rotating mechanism 130 to realize the rotation drive of the material box 120 by the rotating mechanism 130. The supporting base plate 122 can be adapted to the shape of the electrode sheet 200, for example, it can also be rectangular. The baffles 121 can be distributed near the top corner of the supporting base plate 122 to make the side opening 1202 wider, ensuring effective spraying of the edges of the electrode sheet 200.

[0041] Please continue reading. Figure 1 and Figure 2 In some embodiments, multiple baffles 121 are movably disposed on the supporting base plate 122. This arrangement facilitates adjustment of the position of each baffle 121 relative to the supporting base plate 122, thereby changing the position and size of the side opening 1202, which facilitates uniform spraying of coating on all edges of the electrode sheet 200. For example, the baffles 121 can be slidably connected to the supporting base plate 122, making it easy to change the position of the baffles 121.

[0042] Taking a rectangular support base plate 122 as an example, the support base plate 122 includes a long side and a short side. The long side extends along the Y-axis, and the short side extends along the X-axis. Two spaced-apart first baffles 1211 are slidably connected to the short side, and two spaced-apart second baffles 1212 are slidably connected to the long side. The areas between the two first baffles 1211, the areas between the two second baffles 1212, and the areas between adjacent first baffles 1211 and second baffles 1212 all serve as side openings 1202. The two first baffles 1211 can move towards each other along the X-axis, or move away from each other, or one can move while the other remains stationary. The two second baffles 1212 move along the Y-axis, and their movement is basically similar to that of the two first baffles 1211. The goal is simply to change the position and size of the side openings 1202 to ensure uniform coating at the edge of the electrode 200.

[0043] The bottom of the supporting base plate 122 is provided with a linear drive mechanism for driving the baffle 121 to move. For example, it can be a gear and rack transmission mechanism, or a belt drive or chain drive mechanism, as long as it can realize the movement of the baffle 121.

[0044] In some embodiments, the support base plate 122 is provided with a slide groove 1220 arranged around the rotation axis S. Multiple spaced baffles 121 are inserted into the slide groove 1220, and each baffle 121 can move along the slide groove 1220. That is, the position of each baffle 121 is adjusted by the sliding engagement between the slide groove 1220 and the baffles 121. A limiting block 1213 may be provided at the lower position of the baffle 121. The limiting block 1213 is angled to the baffle 121 and located at the opening of the slide groove 1220, which guides the movement of the baffle 121 within the slide groove 1220; furthermore, the limiting block 1213 can restrict the wobbling of the baffle 121, improving assembly stability.

[0045] The short side corresponds to the first groove 1220a, and the long side corresponds to the second groove 1220b. The length of the first groove 1220a extends along the X-axis, and the length of the second groove 1220b extends along the Y-axis. The bottoms of the two first baffles 1211 are inserted into the first groove 1220a and can move along the length of the first groove 1220a. Each first baffle 1211 has a limiting block 1213 protruding on the side of its opposite side from the storage cavity 1201 along the Y-axis. The bottoms of the two second baffles 1212 are inserted into the second groove 1220b and can move along the length of the second groove 1220b. The two second baffles 1212 have a limiting block 1213 protruding on the side of their opposite sides from the storage cavity 1201 along the X-axis.

[0046] The slide 1220 can also be a dovetail groove or a T-shaped groove. The shape of the bottom of the baffle 121 is adapted to the slide 1220, so as to ensure assembly reliability while satisfying the sliding function.

[0047] Alternatively, the support base plate 122 may have a slider protruding from it, and each baffle 121 may have a groove 1220 recessed at its bottom. The sliding of the baffle 121 relative to the support base plate 122 is achieved by the sliding cooperation between the groove 1220 and the slider.

[0048] In some embodiments, the rotating mechanism 130 can directly adopt a rotary table, which includes a support platform and a motor and transmission unit for driving the support platform to rotate. The transmission unit can be a gear transmission unit, which is only illustrative here. The support base plate 122 in the aforementioned material box 120 can be directly fixed to the support platform, that is, the rotating mechanism 130 is connected to the bottom of the material box 120 to reduce interference with the edge of the electrode 200. The motor drives the support platform to rotate through the transmission unit, and the support platform drives the material box 120 to rotate synchronously to satisfy the rotation of the electrode 200 in the storage cavity 1201. Of course, the rotating mechanism 130 can also directly adopt a turntable.

[0049] Alternatively, the rotating mechanism 130 may also include a support base plate 122 disposed on the support platform. In this case, the material box 120 may only include a plurality of baffles 121 arranged at intervals and disposed on the support base plate 122. Alternatively, both the rotating mechanism 130 and the material box 120 may include a support base plate 122, with the two support base plates 122 stacked to improve the support effect, and the material box 120 may serve as an independent structural support for the electrode 200.

[0050] Alternatively, the rotating mechanism 130 can also be connected above the material box 120. In this case, the material box 120 includes a supporting base plate 122 and multiple baffles 121, which are connected to the supporting platform of the rotating mechanism 130 to satisfy the rotational drive of the entire material box 120. This is only an example.

[0051] like Figure 1 As shown, in some embodiments, the bottom of the rotating mechanism 130 is also provided with a mounting base 170, which facilitates the assembly and disassembly of the rotating mechanism 130 and the material box 120 as a whole relative to the spraying station.

[0052] Please see Figure 1In some embodiments, the spraying mechanism 110 is located on the outer periphery of the material box 120. That is, the entire spraying mechanism 110 is located on the outer periphery of the electrode 200. The spraying mechanism 110 includes at least a nozzle 112 and a discharge pipe 113. Insulating slurry is transported to the nozzle 112 via the discharge pipe 113, and the insulating slurry is sprayed onto the edge of the electrode 200 via the nozzle 112. In other embodiments, only a portion of the nozzle 112 and the discharge pipe 113 may be located on the outer periphery of the material box 120.

[0053] Please see Figure 1 In some embodiments, the spraying mechanism 110 includes a slurry box 111, a nozzle 112, and a discharge pipe 113. The nozzle 112 is connected to the slurry box 111 via the discharge pipe 113. The slurry box 111 stores insulating slurry, which can be pumped along the discharge pipe 113 to the nozzle 112 and sprayed onto the edge of the electrode 200. The slurry box 111 is also located on the outer periphery of the material box 120.

[0054] In some embodiments, the spraying mechanism 110 further includes a mounting base 114 and an adjustable plate 115 movably disposed on the mounting base 114. A nozzle 112 is disposed on the adjustable plate 115, which can move relative to the mounting base 114 to adjust the installation height and / or angle of the nozzle 112. The mounting base 114 can be installed at the spraying station, and the adjustable plate 115 can be slidably connected to the mounting base 114. The adjustable plate 115 moves relative to the mounting base 114 in a vertical direction (i.e., the stacking direction of the electrode 200) to drive the nozzle 112 to move synchronously, thereby adjusting the installation height of the nozzle 112. This configuration can satisfy edge spraying of the electrode 200 located at different heights in the material box 120, making it more flexible and convenient to use.

[0055] The mounting base 114 may have mounting holes, and the adjusting plate 115 has a corresponding elongated hole extending vertically. Screws pass through the elongated hole and are threaded into the wall of the mounting hole. When adjusting the installation height, the screws are loosened, and the adjusting plate 115 moves vertically. The screws move relative to each other within the elongated hole to provide guidance. After adjustment, the screws are tightened to lock the adjusting plate 115 relative to the mounting base 114. At least two screws may be provided and spaced apart vertically, each screw passing through an elongated hole and corresponding to a mounting hole.

[0056] Please see Figure 1 and Figure 3 In some embodiments, the electrode coating apparatus further includes a blowing mechanism 140, which is connected to the nozzle 112 and used to provide cold air to the nozzle 112. The cold air can be blown through the nozzle 112 to the edge of the electrode 200 to clean the metal dust adhering and contaminating the edge, thereby improving the cleanliness of the edge and facilitating the adhesion of the insulating paste.

[0057] In some embodiments, the electrode coating apparatus further includes a drying mechanism 150, which is connected to the nozzle 112 and used to provide hot air to the nozzle 112. The hot air is blown through the nozzle 112 toward the edge of the electrode 200, which can dry the insulating slurry adhering to the edge, thereby accelerating the evaporation of moisture in the insulating slurry and reducing the water content of the insulating slurry.

[0058] Please see Figure 1 , Figure 3 and Figure 4 In some embodiments, the nozzle 112 includes multiple spaced-apart and independent working channels 1120. One working channel 1120 is connected to the discharge pipe 113, another working channel 1120 is connected to the purging mechanism 140 via a first air pipe 141, and yet another working channel 1120 is connected to the drying mechanism 150 via a second air pipe 151. For example, the nozzle 112 has three working channels 1120: a first working channel 1120a, a second working channel 1120b, and a third working channel 1120c. The first working channel 1120a is connected to the aforementioned discharge pipe 113 for conveying insulating slurry, the second working channel 1120b is connected to the first air pipe 141 for conveying cold air, and the third working channel 1120c is connected to the second air pipe for conveying hot air. This arrangement allows for the independent ejection of insulating slurry, cold air, and hot air through a single nozzle 112.

[0059] The nozzle 112 may also have two working channels 1120, one of which is connected to the discharge pipe 113 and the other is connected to the first air pipe 141; alternatively, the other working channel 1120 may be connected to the second air pipe 151. In actual use, a nozzle 112 with two working channels 1120 or a nozzle 112 with three working channels 1120 can be selected according to actual needs.

[0060] Of course, in other embodiments, at least two nozzles 112 may be provided according to actual needs. Each nozzle 112 may be a single-channel nozzle, with one nozzle 112 connected to the discharge pipe 113 and the other nozzle 112 connected to the first air pipe 141 or the second air pipe 151. When there are three nozzles 112, the discharge pipe 113, the first air pipe 141, and the second air pipe 151 are respectively connected to the nozzles 112.

[0061] Both the aforementioned purging mechanism 140 and drying mechanism 150 may include an air compressor.

[0062] Please see Figure 1In some embodiments, the electrode coating apparatus further includes a pressure mechanism 160, which is used to press down and fix the electrode 200. It is understood that using the pressure mechanism 160 to fix the electrode 200 prevents the electrode 200 from shaking or shifting during the coating process, thus avoiding the insulating slurry being sprayed onto other locations. Specifically, the pressure mechanism 160 includes at least a pressure plate 161, which is positioned above the electrode 200. The pressure plate 161 can reciprocate along the stacking direction of the electrode 200 and fixes the electrode 200 when pressed down. The stacking direction of the electrode 200 is... Figure 1 In the vertical direction. When spraying is required, the pressure plate 161 moves downward and presses against the uppermost electrode 200; conversely, when spraying is completed or when the electrode 200 needs to be stacked into the material box 120, the pressure plate 161 moves upward to move away from the electrode 200.

[0063] When the pressure plate 161 presses against the electrode 200, the pressure mechanism 160 is configured to rotate synchronously with the electrode 200. This configuration reduces wear between the pressure plate 161 and the electrode 200 and maintains the stability of the electrode 200. The pressure plate 161 can also be rotatably connected to the frame on which the pressure mechanism is mounted.

[0064] In some embodiments, the pressure mechanism 160 further includes a pressure power source 163 and a transmission rod 162. The pressure power source 163 is connected to one end of the transmission rod 162, and the pressure plate 161 is connected to the other end of the transmission rod 162. The pressure power source 163 is rotatably connected to the aforementioned frame via a turntable and is connected to the pressure plate 161 via the transmission rod 162, thereby enabling the pressure plate 161 to move along the stacking direction of the electrode sheets 200. The pressure power source 163 can be an electric push rod, a cylinder, etc., and the transmission rod 162 can be a telescopic rod or a smooth rod. This is only an example.

[0065] Please see Figures 1 to 4In actual use, the thickener is prepared in advance as a thickener organic solution for later use. Then, ceramic particles, binder, thickener organic solution, and dispersant are added to the solvent in sequence and stirred evenly to obtain a ceramic slurry, which is the aforementioned insulating slurry. This insulating slurry is poured into the slurry box 111. The electrode 200 is stacked in the material box 120, the pressure plate 161 moves down and presses against the electrode 200, and then the rotating mechanism 130 drives the material box 120 to rotate around the rotation axis S. The pressure mechanism 160 and the electrode 200 rotate synchronously. The nozzle 112 is switched to the cold air mode, that is, the second working channel 1120b is opened, and the first working channel 1120a and the third working channel 1120c are related. Cold air is first blown onto the electrode 200 through the second working channel 1120b to clean the metal dust adhering to the edge of the electrode 200. Next, nozzle 112 switches to slurry mode, with the first working channel 1120a open and the second and third working channels 1120b and 1120c closed. The nozzle 112 atomizes the insulating slurry into tiny particles, which are then evenly sprayed onto the edges of the electrode 200. Simultaneously, the baffles 121 move accordingly to ensure a complete and uniform spray surface without any omissions. After spraying, nozzle 112 switches to drying mode, with the third working channel 1120c open and the first and second working channels 1120a and 1120b closed. Hot air is ejected through nozzle 112 to accelerate solvent evaporation and ensure that the electrodes 200 do not stick together. This creates an insulating protective layer at the edges of the electrode 200, effectively covering minor burrs and enhancing the safety of the electrode 200.

[0066] The ceramic particles used are nanoparticles with a particle size smaller than the thickness of the electrode sheet. This ensures that the ceramic particles are evenly distributed at the edge of the electrode sheet 200 and prevents adhesion. Furthermore, even if adhesion does occur, the electrode sheet 200 can be moved to the stacking station after spraying and drying, and the adhesion can be released using the suction force of a suction cup.

[0067] like Figure 1 As shown, one embodiment of this application also provides an electrode manufacturing apparatus, including a slitting device and the aforementioned electrode coating device. The slitting device is used to cut the electrode 200, and the electrode coating device sprays insulating slurry onto the cut edges of the electrode 200 via a coating mechanism 110. This electrode manufacturing apparatus has a slitting station and a coating station, which are arranged alternately. The slitting device is located at the slitting station, and the electrode coating device is located at the coating station. After the slitting device cuts the electrode 200 into multiple electrode sheets at the slitting station, a robotic arm can pick them up and stack the multiple electrode sheets 200 in a material box 120 at the coating station. The coating mechanism 110 then sprays insulating slurry onto the edges of the electrode sheets 200.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. An electrode coating device, characterized in that, It includes at least a spraying mechanism (110), at least a portion of which can be disposed on the outer periphery of the electrode (200); The spraying mechanism (110) is configured to move around the electrode (200), and / or the electrode (200) has a rotation axis (S) set at an angle to the plane of the electrode, and the electrode (200) is configured to rotate around the rotation axis (S). The spraying mechanism (110) is used to spray insulating slurry onto the edge of the electrode (200) during the relative movement of the spraying mechanism (110) and the electrode (200).

2. The electrode coating apparatus according to claim 1, characterized in that, The rotation axis (S) is perpendicular to the plane where the electrode is located.

3. The electrode coating apparatus according to claim 1, characterized in that, The electrode coating device further includes a material box (120) and a rotating mechanism (130). The rotating mechanism (130) is connected to the material box (120) and is used to drive the material box (120) to rotate around the rotation axis (S). The material box (120) is provided with a storage cavity (1201) for storing the electrode (200) and a side opening (1202) communicating with the storage cavity (1201). The edge of the electrode (200) is exposed at the side opening (1202).

4. The electrode coating apparatus according to claim 3, characterized in that, The material box (120) includes a plurality of baffles (121), and at least one of the material box (120) and the rotating mechanism (130) includes a supporting base plate (122). The plurality of baffles (121) are spaced apart on the supporting base plate (122) around the rotation axis (S), and a side opening (1202) is provided between any two adjacent baffles (121).

5. The electrode coating apparatus according to claim 4, characterized in that, The plurality of baffles (121) are movably disposed on the supporting base plate (122).

6. The electrode coating apparatus according to claim 5, characterized in that, The supporting base plate (122) is provided with a slide groove (1220) arranged around the rotation axis (S). A plurality of baffles (121) are inserted in the slide groove (1220) at intervals. Each baffle (121) can move along the slide groove (1220) within the slide groove (1220).

7. The electrode coating apparatus according to claim 3, characterized in that, The spraying mechanism (110) is located on the outer periphery of the material box (120), and / or the rotating mechanism (130) is connected to the bottom of the material box (120).

8. The electrode coating apparatus according to any one of claims 1 to 7, characterized in that, The spraying mechanism (110) includes a slurry box (111), a nozzle (112) and a discharge pipe (113), wherein the nozzle (112) is connected to the slurry box (111) through the discharge pipe (113).

9. The electrode coating apparatus according to claim 8, characterized in that, The spraying mechanism (110) also includes a mounting base (114) and an adjustable plate (115) movable on the mounting base (114). The nozzle (112) is mounted on the adjustable plate (115), and the adjustable plate (115) can move relative to the mounting base (114) to adjust the installation height and / or angle of the nozzle (112).

10. The electrode coating apparatus according to claim 8, characterized in that, The electrode coating apparatus further includes a purging mechanism (140), which is connected to the nozzle (112) and used to provide cold air to the nozzle (112); and / or, The electrode coating apparatus further includes a drying mechanism (150), which is connected to the nozzle (112) and is used to provide hot air to the nozzle (112).

11. The electrode coating apparatus according to claim 10, characterized in that, The nozzle (112) includes a plurality of spaced and independent working channels (1120), one of which is connected to the discharge pipe (113). One of the working channels (1120) is connected to the purging mechanism (140) via a first air pipe (141), and / or, another of the working channels (1120) is connected to the drying mechanism (150) via a second air pipe (151).

12. The electrode coating apparatus according to any one of claims 1 to 7, characterized in that, The electrode coating device further includes a pressure mechanism (160) for pressing down and fixing the electrode (200).

13. The electrode coating apparatus according to claim 12, characterized in that, The pressure mechanism (160) is configured to rotate synchronously with the electrode (200).

14. The electrode coating apparatus according to claim 12, characterized in that, The pressure mechanism (160) includes at least a pressure plate (161), which is located above the electrode (200). The pressure plate (161) can reciprocate along the stacking direction of the electrode (200) and fix the electrode (200) when pressed down.

15. The electrode coating apparatus according to claim 14, characterized in that, The pressure mechanism (160) further includes a pressure power source (163) and a transmission rod (162), wherein the pressure power source (163) is connected to one end of the transmission rod (162), and the pressure plate (161) is connected to the other end of the transmission rod (162).

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