Nozzle assembly, distribution system, electrode sheet strip, and electrode

Abstract

The present invention relates to a nozzle assembly, a distribution system, an electrode sheet strip, and an electrode. The nozzle assembly comprises a lip member (7) configured with an annular body portion (70) and a central dam member (72), and a cover plate (6) configured to be connected to the lip member (7), the dam member (72) being recessed with respect to a surface of the lip member (7) connected to the cover plate (6) such that a reservoir (721) is formed between the cover plate (6) and the dam member (72), the reservoir (721) being in fluid communication with the rectangular opening (71), and a recess (73) being provided in one of the two opposing surfaces of the cover plate (6) and the lip member (7), the recess (73) being in fluid communication with the reservoir (721) such that fluid can flow out of the reservoir (721) in a band-like manner through the recess (73).

Description

Technical Field

[0001] This application relates to a nozzle assembly, a dispensing system, an electrode sheet strip, and an electrode.

Background Art

[0002] Cross - reference to related applications This application is the national - phase application of International Patent Application No. PCT / CN2022 / 087132, filed on April 15, 2022, and claims priority to Chinese Patent Application No. 202120793551.3, filed on April 16, 2021. The entire disclosures of both applications are as follows. They are incorporated herein by reference as if the entire contents were set forth herein.

[0003] Electric vehicles (EVs) are the current development direction of automotive technology. Durability is an important parameter characterizing the performance of electric vehicles. Durability is mainly determined by the performance of the EV battery. Lithium - ion batteries, such as so - called chip batteries, are a very important direction in battery research. Typically, lithium - ion batteries for electric vehicles, especially chip batteries, have an aluminum casing in which cells are housed. A plurality of lithium - ion batteries are arranged in parallel to form a battery pack. Lithium - ion batteries need to be insulated while pursuing the lowest possible coating weight.

[0004] Furthermore, under normal conditions, when a lithium battery is being charged, lithium ions are released from the positive electrode and then inserted into the negative electrode. However, under abnormal conditions such as overcharging, low temperature, or high current, lithium ions released from the positive electrode are abnormally inserted into the negative electrode. In this case, lithium ions can only be deposited on the surface of the negative electrode. This is known as lithium precipitation. When lithium precipitation occurs, lithium ions are reduced to different forms of metallic lithium on the surface of the negative electrode, one of which is called lithium dendrite. As the lithium precipitation progresses, it continues to grow in a dendritic manner. This process is irreversible, and once the lithium dendrite grows to a certain length, it can break through the diaphragm between the positive and negative electrodes, causing an internal short circuit in the cell, which is extremely dangerous as it can lead to thermal runaway or even explosion.

[0005] Therefore, it is necessary to coat the surface of the battery with a very thin adhesive material. Generally, it is required to uniformly coat the electrode sheet of the battery with a heat-adhesive material that is greater than 10 mm (width) but less than 20 μm (thickness), which is crucial for improving the reliability of automotive batteries. The heat adhesive must be applied extremely thinly and uniformly to the surface of the electrode sheet. In addition, electrode segments for forming electrodes are usually formed by cutting the electrode sheet, and the outer edges of the electrode sheet also need to be protected before cutting, especially during the process of slitting (cutting into long, narrow strips) the electrode sheet to form the electrode segments. This is clearly a serious challenge for existing coating products. Current methods and products have difficulty achieving a uniform coating thickness of less than 20 μm on the electrode sheet and applying the adhesive to the entire surface of the cathode segment used to form the cathode.

[0006] Therefore, there is a need to improve the coating equipment or distribution system, as well as the adhesive distribution method. [Overview of the project]

[0007] The object of this disclosure is to provide a nozzle assembly capable of precisely dispensing fluids, particularly polyurethane liquid adhesives, to achieve an extremely thin adhesive layer. Furthermore, this disclosure also provides a distribution system, electrode sheet strips, and electrodes.

[0008] The present disclosure provides a nozzle assembly comprising a lip member configured to have an annular body and a dam member in the center, wherein the dam member extends from the lower edge to the upper edge of a rectangular space enclosed by the body so as to form a rectangular opening between the upper edge of the dam member and the upper edge of the rectangular space, the dam member extends laterally to the full width of the rectangular opening, and the rectangular opening is adapted to receive fluid, and a cover plate configured to be connected to the lip member, wherein the dam member is recessed relative to the surface of the lip member connected to the cover plate so as to form a reservoir between the cover plate and the dam member, the reservoir is in fluid communication with the rectangular opening, and a recess is provided on one of the two opposing surfaces of the cover plate and the lip member, the recess is in fluid communication with the reservoir so as to allow fluid to flow out of the reservoir in a strip through the recess.

[0009] In this way, the thickness and width of the fluid distributed from the recess can be precisely and stably controlled so that a desired thickness, especially an extremely thin coating, can be obtained on the substrate / workpiece.

[0010] Preferably, the recess is provided on the surface of the lip member facing the cover plate. As a result, the recess can be manufactured in a simple and efficient manner. Also preferably, in the lateral direction, the width of the recess is less than or equal to the width of the dam member, so that the fluid can flow out of the space uniformly through the band-shaped recess.

[0011] Preferably, the recess has a consistent depth relative to the surface on which it is provided, and the recess is recessed by 50 to 150 μm relative to the surface on which it is provided. This allows an extremely thin adhesive layer to be applied to the surface of the substrate.

[0012] Preferably, the dam member is recessed relative to the surface of the lip member on the side opposite to the cover plate.

[0013] Preferably, a boss is provided on the outer edge of the side of the lip member connected to the sealing member in order to restrict the movement of the sealing member.

[0014] Preferably, guide bosses are provided on the bottom surface of the cover plate and / or the bottom surface of the lip member.

[0015] Preferably, the cover plate and the lip member are fastened together with screws in this order. This allows for easy assembly.

[0016] The present disclosure also provides a distribution system comprising a fluid supply assembly, a metering assembly in the form of a volumetric measuring cavity pump configured to communicate with the fluid supply assembly and receive fluid from the fluid supply assembly, and a nozzle assembly that communicates with the metering assembly to receive fluid from the metering assembly, wherein the nozzle assembly is the nozzle assembly described above.

[0017] Preferably, the fluid supply assembly includes a supply container. The supply container is configured to house a fluid cartridge or to be connected to a pipe for supplying fluid.

[0018] Preferably, the weighing assembly includes a drive gear and a driven gear. The drive gear is driven by a motor.

[0019] Preferably, the metering assembly includes an upper plate having an upper plate channel for receiving fluid from a fluid supply assembly, a bottom plate having a bottom plate channel that communicates with the rectangular opening of a nozzle assembly, and a gear support plate positioned between the upper plate and the bottom plate and having an opening at its center for housing a drive gear and a driven gear.

[0020] Preferably, each of the drive gear and the driven gear's gear shafts is inserted into corresponding holes in the bottom plate to provide positioning of the gear shafts.

[0021] Preferably, the gap between the drive gear and the driven gear on one side of the metering assembly is in fluid communication with the upper plate flow path of the upper plate, and the gap between the drive gear and the driven gear on the other side of the metering assembly is in fluid communication with the bottom plate flow path of the bottom plate.

[0022] Preferably, a sealing member is provided between the gear support plate and the bottom plate, and the sealing member surrounds the opening of the gear support plate.

[0023] Preferably, the lip member of the nozzle assembly is connected to the bottom plate such that the upper edge of the dam member is higher than the outlet of the bottom plate flow path.

[0024] Preferably, a sealing member is provided between the lip member and the bottom plate, and the sealing member has a rectangular central opening. The width of the central opening is greater than or equal to the width of the rectangular opening, and the height of the central opening is greater than or equal to the distance from the upper edge of the rectangular opening to the lower edge of the outlet of the bottom plate flow path of the bottom plate.

[0025] Preferably, the bottom plate has a protrusion where the outlet of the bottom plate flow path of the bottom plate is disposed, and the protrusion is adapted to be connected to the lip member.

[0026] This application also relates to a method of dispensing a fluid using a dispensing system on a substrate having a thinner portion, the method comprising the step of dispensing a fluid onto the thinner portion of the substrate using the dispensing system.

[0027] Preferably, the substrate is an electrode sheet for manufacturing an electrode of a battery, the electrode sheet has a thicker body portion and a thinner edge portion, the edge portion is located on the side of the body portion and is continuous with the body portion, and the method comprises the step of dispensing a fluid onto the surface of the edge portion using the dispensing system to manufacture an electrode sheet strip. The battery may be a chip battery.

[0028] Preferably, the method includes supplying an electrode sheet to a slitting machine, using the slitting machine to slit an edge along a slitting path, and using a dispensing system to dispense a fluid onto the surface of the edge after the slitting.

[0029] Preferably, the slitting machine starts slitting at a fixed distance from the leading end of the electrode sheet and ends slitting at a fixed distance from the trailing end of the electrode sheet.

[0030] Preferably, the edge of the electrode sheet is slit such that the width of the slit on the edge is suitable for the fluid from the dispensing system to completely penetrate the slit.

[0031] Preferably, the width of the slit is determined according to the thickness of the edge, the application temperature of the fluid, and / or the sheet feeding speed.

[0032] Preferably, the slitting path is non-linear.

[0033] Preferably, the edge is slit to form a plurality of electrode ear portions along the slitting path. The electrode ear portions are preferably trapezoidal.

[0034] The present application also provides an electrode sheet strip for manufacturing an electrode of a battery, characterized in that it is manufactured using the above method.

[0035] Preferably, the electrode sheet strip is cut into a plurality of sheet segments having the same shape along the width direction, and the plurality of sheet segments are stacked together to form an electrode.

[0036] The present application also provides an electrode characterized in that it is manufactured from the above electrode sheet strip.

[0037] Preferably, the electrode is an anode or a cathode of a battery.

[0038] The nozzle assemblies and dispensing systems of this disclosure can achieve extremely thin adhesive thicknesses, for example, less than 20 μm, thereby meeting the spraying requirements on the surface of chip batteries in electric vehicles. The method described in this application can bond the outer edges of the electrode lugs of chip batteries for protection.

[0039] These and other purposes and advantages of this disclosure will become more fully apparent from the following description in conjunction with the accompanying drawings. Throughout the drawings, the same reference numerals are used to indicate the same or similar parts. [Brief explanation of the drawing]

[0040] [Figure 1] This is an exploded view showing the nozzle assembly according to this disclosure, from the front at an oblique angle. [Figure 2] This is an exploded view showing the nozzle assembly as disclosed in this disclosure, at an oblique angle to the rear. [Figure 3] This is a cross-sectional view taken along line III-III in Figure 2, showing the nozzle assembly relating to this disclosure. [Figure 4] A side view of the nozzle assembly according to this disclosure is shown. [Figure 5] This disclosure shows a front view of the nozzle assembly. [Figure 6] This is an exploded view showing a distribution system comprising a nozzle assembly according to the present disclosure. [Figure 7] This is a cross-sectional view showing the distribution system. [Figure 8] This is an exploded view showing a diagonal front view of part of the distribution system. [Figure 9] This is an exploded view from the rear at an angle, showing part of the distribution system. [Figure 10] This is a perspective view of an electrode sheet used to manufacture electrodes for battery cells. [Figure 11] This is a perspective view of an electrode sheet strip obtained after the electrode sheet has been slit using conventional technology. [Figure 12] This is a perspective view showing an electrode sheet piece after the electrode sheet has been slit using a new slitting process. [Figure 13] This is a schematic diagram illustrating the operating principle of the combination of the distribution system and the new slitting process described herein. [Modes for carrying out the invention]

[0041] Embodiments provided in this disclosure are described in detail below with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant descriptions are omitted. In the following description, terms indicating direction, such as “up,” “down,” “front,” “back,” “up,” and “down,” are used solely to describe the drawings and do not constitute a substantial limitation to this disclosure.

[0042] Figure 1 is an oblique front exploded view showing the nozzle assembly according to the present disclosure. As shown in Figure 1, the nozzle assembly 60 mainly comprises a lip member 7 and a cover plate 6. The lip member 7 is substantially rectangular in shape and has an annular main body portion 70 and a central dam member 72 extending from the lower end to the upper end of the rectangular space enclosed by the main body portion 70, with a rectangular opening 71 formed between the upper end of the dam member 72 and the upper end of the rectangular space. The dam member 72 extends across the entire width of the rectangular opening 71 in the width direction of the lip member 7. The lateral direction of the lip member 7 is the same as the lateral direction of the rectangular opening 71. The rectangular opening 71 is adapted to receive fluid. For example, the rectangular opening 71 can be fluid-connected to a fluid supply source, a metering assembly connected to a fluid supply source, etc.

[0043] The cover plate 6 is configured to be connected to the lip member 7. The front surface of the cover plate 6 is flat, and the rear surface is connected to the lip member 7. The dam member 72 is recessed to a predetermined depth relative to the surface of the lip member 7 connected to the cover plate 6, i.e., the front surface, and as a result, a reservoir 721 is formed between the cover plate 6 and the dam member 72 (see Figure 3), and the reservoir 721 is in fluid communication with the rectangular opening 71. On one of the two opposing surfaces of the cover plate 6 and the lip member 7, a recess 73 is provided where the width in the short direction of the lip member 7 is significantly greater than its depth, and this recess 73 is in fluid communication with the reservoir 721, allowing fluid to flow out in a strip-like manner from the reservoir 721 through the recess 73. For example, as shown in Figures 1 and 3, a recess 73 is provided on the surface of the lip member 7 facing the cover plate 6, i.e., the front surface, and the width in the short direction of the recess 73 is less than or equal to the width of the dam member 72. In the lateral direction of the lip member 7, the width of the dam member 72 is equal to the width of the rectangular opening 71.

[0044] The recess 73 is recessed by 50 μm to 150 μm from the surface on which the recess 73 is provided. It is preferable that the depth of the recess 73 is uniform.

[0045] Furthermore, as clearly shown in Figure 3, for example, the dam member 72 is recessed to a consistent depth relative to the surface of the lip member 7 facing the cover plate 6, i.e., the front surface. However, the configuration of the dam member 72 is not limited to this, and the dam member 72 may extend diagonally backward from the bottom to the top.

[0046] Figure 2 is an oblique rearward exploded view showing the nozzle assembly according to this disclosure. As shown in Figure 2, it is preferable that the back surface of the cover plate 6, i.e., the surface connected to the lip member 7, is flat.

[0047] Figure 3 is a cross-sectional view taken along line III-III in Figure 2, showing the nozzle assembly according to this disclosure. As shown in Figure 3, the dam member 72 is recessed on the side of the lip member 7 opposite to the cover plate 6, i.e., the back surface, and it is preferable that a space for a reservoir 722 is formed on the side of the dam member 72 opposite to the cover plate 6. It is easy to understand that the recess depth of the reservoir 722 may be 0, i.e., the reservoir 722 may not be provided.

[0048] Preferably, a boss 74 is provided on the outer edge of the lip member 7 opposite to the cover plate 6 to receive the sealing member and restrict its movement. The cover plate 6 and the lip member 7 are fixed together, for example, by screws.

[0049] The thickness of the dam member 72 is not particularly limited here, but is generally thinner than the thickness of the lip member 7. The thickness of the dam member 72 and the depth of the recesses on both sides can be determined according to specific coating requirements. As shown in Figure 3, on the side of the dam member 72 facing the cover plate 6, the bottom edge of the dam member 72 smoothly transitions to the upper edge of the recess 73 to facilitate the flow of the fluid material. The recess depth of the reservoir 721 is not particularly limited. For example, the recess depth of the reservoir 721 is approximately equal to the height of the opening 71. The recess depth of the reservoir 722 is less than or equal to the height of the opening 71; in other words, the depth of the reservoir 722 is less than or equal to the distance from the upper end to the lower end of the opening 71. The lip member 7 has approximately the same thickness as the cover plate 6. The lip member 7 and the cover plate 6 have approximately the same cross-sectional shape.

[0050] Figure 4 shows a side view of the nozzle assembly according to the present disclosure. As shown in Figure 4, preferably, the surfaces of the cover plate 6 and the lip member 7 facing the workpiece to be coated, i.e., the bottom surfaces, may have guide bosses 65 and 75, respectively. After assembly, the uniformity, flatness, and roughness of the height of the cover plate 6 and the lip member 7 are very small, thereby avoiding wear and scratching of the surface of the workpiece to be coated during operation.

[0051] Figure 5 shows a front view of the nozzle assembly according to this disclosure. As shown in Figure 5, the bottom surface of the guide boss 65 of the cover plate 6 has a step 651. However, the guide boss on the bottom surfaces of the cover plate 6 and the lip member 7 may be flat, or alternatively or additionally have a step, and the step may be provided at any position and may have any length and height. The specific size of the step can be determined according to the actual spraying requirements.

[0052] Figure 6 is an exploded view showing a distribution system including a nozzle assembly according to the present disclosure. As shown in Figure 6, the distribution system includes a fluid supply assembly, a metering assembly 3, and a nozzle assembly 60. However, it will be understood that the fluid supply assembly and / or metering assembly 3 are not essential, and the nozzle assembly 60 may be directly connected to a fluid supply source. The fluid supply assembly includes a supply container 9. The supply container 9 can house a fluid tank of various specifications, for example, a 300cc adhesive tank. The fluid material suitable for distribution is not limited to liquid adhesives, but may be various other fluid materials in the spraying process, and the liquid adhesive may be an insulating liquid adhesive or a conductive liquid adhesive. Generally, conductive liquid adhesives contain a conductive substance and conduct electricity after being applied to the surface of a workpiece. Instead of using a fluid tank, the supply container 9 may be connected to a hose or other connecting pipe. The hose or other connecting pipe is directly connected to another metering system and / or fluid source. In this disclosure, when a hose connection is used, the cutoff control module must be set to a position where the fluid begins to flow into the metering assembly 3.

[0053] The metering assembly 3 is an integrated metering system and is in the form of a volumetric measuring cavity pump. Volumetric measuring cavity pumps can have various configurations. The metering assembly 3 is configured to communicate with the supply container 9 to receive fluid from the supply container 9. As shown in Figure 6, for example, the metering assembly 3 mainly consists of a gear set, namely a drive gear 31 and a driven gear 32. The drive gear is driven by a drive device such as a motor 1. The motor 1 is, for example, a servo motor. The drive gear 31 and the driven gear 32 form a microgear set capable of transporting fluid.

[0054] The metering assembly 3 also includes an upper plate 2 having an upper plate channel for receiving fluid from a supply container 9, a bottom plate 5 having a bottom plate channel that communicates with a nozzle assembly 60, for example, a rectangular opening 71 of the nozzle assembly 60, and a gear support plate 4 located between the upper plate 2 and the bottom plate 5. An opening is formed in the center of the gear support plate 4 for housing a drive gear 31 and a driven gear 32. That is, a microgear set consisting of a drive gear 31 and a driven gear 32 is arranged inside the gear support plate 4 to constitute an internal metering pump.

[0055] The gap between the drive gear 31 and the driven gear 32 on one side of the weighing assembly 3 is in fluid communication with the upper plate flow path of the upper plate 2, and the gap between the drive gear 31 and the driven gear 32 on the other side of the weighing assembly 3 is in fluid communication with the bottom plate flow path of the bottom plate 5. Therefore, fluid can flow from the upper plate 2 through the gear set to the bottom plate 5.

[0056] Preferably, a sealing member is provided between the gear support plate 4 and the bottom plate 5, and the sealing member surrounds the opening of the gear support plate 4. The lip member 7 of the nozzle assembly 60 is attached to the bottom plate 5 such that the upper end of the dam member 72 is higher than the outlet of the bottom plate flow path.

[0057] Therefore, a metering pump can be used to accurately and appropriately distribute fluids such as thermal adhesives to the nozzle assembly. Specifically, the internal space of the metering pump, i.e., the metering assembly 3, is in fluid communication with the supply container 9 so that it can receive fluid material from the supply container 9. The nozzle assembly 60 is in fluid communication with the metering assembly 3 so that it can receive fluid material from the metering assembly 3. The fluid material passes sequentially through the fluid supply assembly, specifically the supply container 9, the metering assembly 3, and the opening 71 of the lip member 7, and then can flow out of the nozzle assembly in an accurate amount through the recess 73 between the lip member 7 and the cover plate 6.

[0058] The supply container 9 can be fixed together in several ways and can be in fluid communication with the metering assembly 3. Preferably, the supply container 9 is placed directly on the upper plate 2 of the metering assembly 3 and is in fluid communication with the upper plate flow path within the upper plate 2. A drive device such as a motor 1 for driving the metering assembly 3 and the supply container 9 are arranged side by side on the upper plate 2. Fluid material from the supply container 9 flows into the metering assembly 3 through the upper plate flow path within the upper plate 2.

[0059] The gear shafts 33 of the drive gear 31 and 34 of the driven gear 32 of the weighing assembly 3 (see Figures 8-9) pass through the gear support plate 4 and are then inserted into the upper plate 2 and bottom plate 5 at both ends. The motor 1 and the gear set are located on opposite sides of the upper plate 2. The gear shaft 33 of the drive gear 31 is driven and connected to the output shaft (not shown) of the motor 1 via a through hole provided in the upper plate 2. Both ends of the gear shaft 34 of the driven gear 32 are inserted into holes provided in the upper plate 2 and holes provided in the bottom plate 5, respectively. Therefore, the gear shaft 34 of the driven gear 32 supports the driven gear 32 on one hand and positions the gear set on the other. The upper plate 2, the gear support plate 4 and the bottom plate 5 are fixed together by screws.

[0060] The distribution system also includes a control assembly 11 for controlling the operation of the distribution system. The control assembly 11 can be fixed to the housing of the supply container 9, for example, by fixing and connecting it to the supply container 9 on the side of the supply container 9 opposite the motor 1.

[0061] Figure 7 is a cross-sectional view showing the distribution system according to the present disclosure. Figure 7 shows the flow paths of the fluid material in the distribution system. Specifically, as shown in Figure 7, the fluid material from the supply container 9 flows through the outlet of the supply container 9 into the upper plate flow path of the upper plate 2 of the metering assembly 3. The upper plate 2 includes, for example, a vertical flow path 21, a horizontal flow path 22, and a vertical flow path 23 in sequence, and these flow paths are in fluid communication in sequence, corresponding to the upper plate flow path in the means for solving the problem. The fluid material from the supply container 9 enters the vertical flow path 21 of the upper plate 2 and then flows through the horizontal flow path 22 and the vertical flow path 23. The fluid material from the vertical flow path 23 of the upper plate 2 enters the input side gap of the metering assembly 3 and then enters the output side gap of the metering assembly 3, which is driven by a gear pair, i.e., a driving gear 31 and a driven gear 32. The fluid material from the output clearance of the metering assembly 3 flows into the bottom plate flow path of the bottom plate 5 of the metering assembly 3, specifically first into the vertical flow path 52 of the bottom plate 5, and then into the horizontal flow path 53 of the bottom plate 5. The fluid material from the horizontal flow path 53 of the bottom plate 5 flows through the opening 71 between the dam member 72 (see Figure 3) at the center of the lip member 7 of the nozzle assembly 60 and the annular body portion 70 of the lip member 7, and then flows out through the recess 73 or slot between the lip member 7 and the cover plate 6, and is distributed onto the surface of the workpiece or substrate.

[0062] Figure 8 is an oblique front exploded view showing a part of the distribution system according to this disclosure. As shown in Figure 8, the nozzle assembly 60 is in fluid communication with the metering assembly 3. The output-side clearance of the gear set of the metering assembly 3 is aligned with the inlet of the vertical channel 52 of the bottom plate 5, thereby allowing the fluid material from the gear set of the metering assembly 3 to flow into the bottom plate channel of the bottom plate 5. The bottom plate 5 may be a substantially rectangular plate, in which case both the vertical channel 52 and the horizontal channel 53 of the bottom plate 5 are formed inside the body of the rectangular bottom plate 5. However, the bottom plate 5 may have a projection 54 protruding from the bottom surface 56. The vertical channel 52 extends downward from the upper surface 55 of the bottom plate 5 into the projection 54, and the horizontal channel 53 can be provided within the projection 54 so as to be in fluid communication with the vertical channel 52 (as shown in Figure 7). This projection 54 allows the overall thickness of the bottom plate 5 to be moderately thin, thereby reducing the weight of the bottom plate 5. The protruding portion 54 has a joint surface 541, preferably a flat surface. The outlet of the horizontal channel 53 is located on the protruding portion 54, specifically on the joint surface 541. The joint surface 541 of the bottom plate 5 of the metering assembly 3 is suitable for connection to the corresponding surface of the lip member 7 of the nozzle assembly 60. The vertical channel 52 and the horizontal channel 53 can have various cross-sectional shapes, for example, a circular cross-sectional shape. Preferably, the horizontal channel 53 may have a flat mouth-shaped cross-section, in other words, its cross-section has a slot shape. The bottom plate channels of the bottom plate 5 are not limited to the vertical channel 52 and the horizontal channel 53, and may be other forms of channels. For example, another channel may be provided between the vertical channel 52 and the horizontal channel 53.

[0063] The bottom plate 5 preferably has a sealing groove 51 on its upper surface 55. The lower surface of the gear support plate 4 is provided with a sealing groove corresponding to this sealing groove 51. The sealing groove 51 and its corresponding sealing groove form a housing space in which a sealing member is placed. The sealing member surrounds the internal space of the weighing assembly 3 to achieve liquid tightness.

[0064] The lip member 7 of the nozzle assembly 60 may be directly connected to the bottom plate 5 of the metering assembly 3 such that the upper end of the dam member 72 is higher than the outlet of the horizontal flow path 53, and the opening 71 is in fluid communication with the outlet of the horizontal flow path 53. The opening 71 is in fluid communication with the horizontal flow path 53 via a reservoir 722 (see Figure 3) of the lip member 7, which is located on the side of the lip member 7 opposite to the cover plate 6 or on the side of the lip member 7 facing the bottom plate 5. Various configurations of fluid communication between the opening 71 and the outlet of the horizontal flow path 53 are possible. The cover plate 6 is connected to the lip member 7 on the side of the lip member 7 opposite to the bottom plate 5.

[0065] Preferably, a sealing member 8 is provided between the lip member 7 and the bottom plate 5. If the sealing member 8 is provided, the depth of the reservoir 722 may be zero. The sealing member 8 has a central opening 81 that is substantially rectangular in shape. The main dimensions of the central opening 81 and the rectangular opening 71 are different from each other. Specifically, the width of the central opening 81 is greater than or equal to the width of the rectangular opening 71, and the height of the central opening 81 is greater than or equal to the distance between the upper edge of the rectangular opening 71 and the lower edge of the outlet of the horizontal flow path 53 in the bottom plate 5. Both the lip member 7 and the cover plate 6 can be fixed to the bottom plate 5 via screws that pass through the sealing member 8. Preferably, the screws pass through the cover plate 6, the lip member 7, the sealing member 8, and corresponding screw holes in the bottom plate 5 in sequence, starting from one side of the cover plate 6, thereby connecting and fixing these components together.

[0066] In operation, fluid such as liquid adhesive from the horizontal channel 53 of the bottom plate 5 first reaches the back side of the dam member 72, where it is blocked. The liquid adhesive then rises along this back side of the dam member 72, and once it reaches the upper edge of the dam member 72, it passes over the upper edge of the dam member 72, through the opening 71, and begins to enter the space between the cover plate 6 and the lip member 7, i.e., the reservoir 721, and finally flows out of the nozzle assembly through the recess 73. The flow path of the fluid material is schematically shown by the arrows in Figure 8.

[0067] Figure 9 shows an oblique rear exploded view of a portion of the distribution system. The lip member 7 can make planar contact with the sealing member 8. Alternatively or preferably, the outer edge of the surface of the lip member 7 on the side opposite to the cover plate 6, i.e., the side connected to the sealing member 8, may be provided with a boss 74, thereby forming a recess for receiving the sealing member 8. This boss 74 restricts the movement of the sealing member 8, and the height of the boss is preferably about 60% or less of the thickness of the sealing member 8 in order to avoid interference between the boss 74 and the joint surface 541 of the bottom plate 5 after the sealing member 8 has been compressed.

[0068] Preferably, the bottom edge of the reservoir 722 is aligned with or at the same height as the bottom edge of the outlet of the horizontal channel 53 of the bottom plate 5.

[0069] The various components of the distribution system may be formed from the same material. Preferably, each component is made of an aluminum alloy. In addition, weight-reducing holes can be provided in the components to reduce the overall weight of the system.

[0070] The assembly of the distribution system of this disclosure is described below. The distribution system can be divided into a plurality of subsystems, and the distribution system is obtained by assembling these subsystems. First, the lip member 7 and the cover plate 6 are fixed with screws to form the nozzle assembly 60, i.e., the first subsystem; the gear set, gear support plate 4, bottom plate 5, and top plate 2 are fixed to form the metering assembly 3, i.e., the second subsystem; the fluid supply assembly including the supply container 9 is assembled to form the third subsystem; the first to third subsystems are assembled together; and the drive device such as the motor 1 is assembled on the metering assembly 3 to form the entire distribution system. It is easily understood that the above assembly steps are not fixed and can be freely modified in an appropriate manner.

[0071] The operating principle of the distribution system described herein is explained below.

[0072] When the control assembly 11 issues a start command and the distribution system is started, the fluid flowing from the fluid tank or hose enters the supply container 9 of the fluid supply assembly. The fluid, such as liquid adhesive, enters the flow path of the upper plate 2 of the metering assembly 3, and then enters the inlet clearance of the gear set. When driven by the motor 1, the fluid is supplied by the gear set of the metering assembly 3 to the outlet gap of the gear set, i.e., enters the bottom plate 5. The liquid adhesive that flows out from the bottom plate 5 passes through the sealing member 8 and is dammed up by the dam member 72 of the lip member 7. The fluid then passes over the dam member 72, through the opening 71, enters the reservoir 721 between the cover plate 6 and the lip member 7, and finally exits the nozzle assembly through the slot-shaped recess 73 and is distributed onto the surface of a workpiece or substrate, such as a battery. Thus, the distribution system uses a slit nozzle or nozzle scraper to distribute an extremely thin liquid adhesive of a predetermined width onto the target substrate. The distribution system of this disclosure may also be referred to as a band applicator incorporating a custom-designed slot spray assembly or nozzle assembly.

[0073] From the standpoint of fluid flow paths and operating principles, the design concept of the nozzle assembly and / or distribution system of this disclosure is distinctly different from any previous designs of slit coating nozzles. The distribution system of this disclosure integrates a precision metering pump and a slit nozzle to achieve high-precision coating performance, provides various high-temperature liquid adhesives, offers various types of liquid adhesive patterns, and provides a user-friendly human-machine interface, reliable and durable spare parts, and easy maintenance. In addition, the distribution system of this disclosure supports high-speed production lines in automated production lines.

[0074] The distribution system of this disclosure is suitable for coating surfaces such as chip batteries and electrode sheets used to manufacture the electrodes of chip batteries. The chip battery is preferably a battery for supplying power to an electric vehicle. The power battery of an electric vehicle typically takes the form of a lithium-ion battery. Typically, the cathode of a lithium-ion battery is made from an aluminum sheet and the anode is made from a copper sheet.

[0075] Figure 10 is a perspective view of an electrode sheet used to manufacture electrodes for battery cells. Power batteries for electric vehicles are typically formed by stacking multiple sheet-type battery cells. Electrodes such as the cathode and anode of each unit cell are formed by cutting an electrode sheet into segments and stacking the cut sheet segments together. As shown in Figure 10, the electrode sheet 10 for manufacturing battery cell electrodes has a long strip shape and is usually wound onto a reel to form a sheet reel. The electrode sheet 10 has a thicker body portion 101 and a thinner edge portion 102. The thickness of the edge portion 102 is, for example, several tens of micrometers. The edge portion 102 is located on one side of the body portion 101 in the width direction. Step portions 103 are formed above and below the connection between the body portion 101 and the edge portion 102. The body portion 101 and the edge portion 102 each have a rectangular cross-section. The body portion 101 typically already has a coating on its surface to prevent corrosion. The edges 102 are typically left bare or covered with tape to facilitate further slitting.

[0076] Figure 11 is a perspective view of an electrode sheet strip obtained after an electrode sheet has been slit in the prior art. To form electrode segments with electrode tabs for manufacturing electrodes for a battery cell, the electrode sheet 10 shown in Figure 10 is typically slit by a slitting machine. Driven by drive rollers, the electrode sheet 10 passes through the slitting machine, which slits the electrode sheet 10, for example, by laser slitting. The slit path is formed along the length of the electrode sheet 10 on the edge 102 of the electrode sheet 10, and the slit path is generally not straight. For example, multiple tabs 1021 are formed at equal intervals on the edge 102. The multiple tabs 1021 are formed by cutting out a part of the edge 102, i.e., a notch 1022 (see Figure 12). After slitting, the obtained electrode sheet strip 10' is cut along a cutting line L in the width direction of the sheet strip to form multiple sheet segments. The multiple sheet segments are then stacked together to form electrodes for a chip battery.

[0077] In the conventional technology, as described above, before slitting, the main body portion 101 may be covered with a coating, and the edge portion 102 may be attached with a layer of adhesive tape to protect the entire electrode sheet 10. After slitting, the resulting ear portion remains partially exposed, for example, at least the outer edge of the ear portion 1021 is exposed, and in this state, the electrodes of the battery cell are formed. In the operating state, the electrodes are directly immersed in the electrolyte. As a result, the manufactured battery may short-circuit and cause a fire. This poses a significant security risk.

[0078] To solve this problem, the entire surface of the electrode sheet, especially the edges including the lugs, needs to be coated, and given the requirement for a lower coating mass ratio, the surface of the electrode sheet needs to be coated with a very thin layer of coating. For example, a new conductive adhesive has been manufactured by mixing the electrode material with a conductive binder. The adhesive is coated on the edges of the electrode sheet in a very thin layer, providing protection while the electrode conducts electricity. The thickness of the coating or primer must be strictly controlled. The thickness needs to be controlled to less than 30 μm, preferably less than 20 μm. The nozzle assembly and the distribution system incorporating the same according to this disclosure can solve the above problem by allowing the recess 73 of the nozzle assembly to have a very small recess depth for distributing an extremely thin layer of fluid.

[0079] In particular, a method is provided for distributing a fluid onto a substrate having a thinner portion using the distribution system described herein. This method includes the step of distributing a fluid onto a thin portion of a substrate using the distribution system, thereby obtaining an extremely thin (less than 20 μm) fluid layer on the thinner portion. The substrate may be, for example, a sheet material used to manufacture electrodes for chip batteries.

[0080] Figure 12 is a perspective view showing an electrode sheet strip obtained after slitting according to a new cutting process. As described above, in the prior art, an electrode sheet 10 as a cathode sheet or anode sheet is sent to a slitting machine, and as a result the electrode sheet is slit into thin strips, i.e., electrode sheet strips 10', suitable for electrodes of various sizes. Specifically, when preparing electrode sheet segments for manufacturing battery electrodes, it is necessary to first slit the edge 102 of a longer electrode sheet 10 to obtain an electrode sheet strip 10' having electrode ears 1021 by completely removing the edge material, i.e., the notches 1022, and then cut laterally a region of the electrode sheet strip 10' containing at least one electrode ear 1021 to obtain multiple sheet segments of the same size. In conventional technology, the edges 102 of the electrode sheet 10 are very thin, and when the electrode sheet is slit, the edges 102 are usually exposed, or a white, flat adhesive tape is attached between the coated area of ​​the electrode sheet 10, i.e., the main body 101, and the blank area, i.e., the edges 102, so that the electrodes formed therein are at least partially exposed. This poses a certain safety risk to the battery.

[0081] However, using the distribution system of this disclosure, it is possible to distribute a very thin layer of fluid onto the edge 102 after slitting, thereby forming a very thin coating. The thickness of the coating is typically less than 20 μm. Due to the very thin coating, the coating mass is kept small while protecting the edge.

[0082] On the other hand, as shown in Figure 11, the electrode ear portion 1021 is trapezoidal, and the outer edge (or slit path) of the edge portion 102 after slitting is not straight. Therefore, if a fluid such as liquid adhesive is directly applied to the surface of the electrode sheet after slitting, for example, the surface of the edge portion 102, it is clear that the liquid adhesive will adhere to the transport rollers that transport the electrode sheet, contaminating the slitting machine, because the width of the nozzle edge is constant. Furthermore, due to the thicker adhesive layer sprayed by existing trough dispensers, it is impossible to distribute the adhesive so as to directly wrap around the slotted outer edge of the electrode sheet strip.

[0083] Therefore, the outer edges of the electrode sheet strip 10' must be sealed with adhesive before it is further cut into sheet segments to form the final electrodes. That is, the electrode ears of the electrode sheet strip 10' also need to be adequately protected before the sheet segments are formed. If the slotted outer edges of the electrode sheet strip are directly bonded, the outer edges are too thin to effectively bond them directly along the entire corner.

[0084] However, this disclosure provides a completely new type of sheet slitting and sizing edge sealing process, in which the fluid distribution step is performed as soon as the electrode sheet is slit. Specifically, as shown in Figure 12, according to this disclosure, when the electrode sheet 10 is slit, the edge material of the electrode sheet, i.e., the notch 1022, is not completely removed. Conversely, when slitting, the slitting machine starts slitting at a certain distance from the leading edge 104 of the electrode sheet. In addition, the slitting machine ends slitting at a certain distance from the trailing edge 105 of the electrode sheet. That is, the slit path does not extend along the entire length of the electrode sheet 10. Through the slitting process described above, the edge material of the electrode sheet to be removed, i.e., the notch 1022, is not removed during slitting, thereby forming an integrated electrode sheet strip 10' including the sheet body and the notch. The sheet body includes at least a body portion 101 and an ear portion 1021. In conventional technology, the cut-out portion of the electrode sheet is peeled directly from the main body of the electrode sheet. In contrast, in this new process, a continuous slit 1023 (see Figure 13) is cut into the electrode sheet 10 in the feeding direction, but the electrode sheet strip 10' after slitting or after being transported to the distribution system remains a single piece including the notch 1022 that is removed.

[0085] Figure 13 is a schematic diagram illustrating the operating principle of the combination of the distribution system and the new slitting process according to this disclosure. As shown in Figure 13, the electrode sheet strip 10' obtained after slitting is still an integral part including the edge material, i.e., the notch 1022 and the sheet body, and is then supplied under the nozzle assembly 60 according to this disclosure. The distribution system then uniformly sprays a fluid, such as liquid adhesive, onto the edge 102 of the sheet. Depending on the actual size of the sheet, the best-sized slit pattern can be selected. As long as the edge 102 is coated with a fluid such as liquid adhesive, a thin layer of fluid will exist in the slit 1023 on the edge 102. The nozzle assembly 60 is close to the substrate surface, i.e., the surface of the edge 102 of the electrode sheet strip 10', and scrapes off some of the fluid on the edge 102. At the same time, due to gravity, the fluid falls into the slit 1023 and, in some cases, penetrates the slit 1023. As a result of this reaction, the fluid gradually envelops the opposing sides of the slit 1023. Furthermore, by reverse-floating the electrode sheet strip 10' obtained after slitting on a conveyor roller after coating one side, the other side of the electrode sheet strip 10' can also be coated in the same way. Finally, any unnecessary narrow trim, i.e., the notches 1022, peel off from the sheet body as the additional separation process progresses. Thus, the outer cut edges of the electrode sheet strip 10' obtained after slitting are also completely covered by the fluid. The outer cut edges include the outer edges of the ear portions 1021 and the outer edges between the ear portions 1021. Thus, complete coating protection of the electrode ear portions 1021 of the electrode sheet strip 10' obtained after slitting is achieved.

[0086] Existing slitting processes use a laser directly to continuously cut electrode sheets into the shape of electrode lugs. This disclosure provides a completely new electrode lug slitting and coating process, particularly an edge sealing process, which can provide a new battery cell manufacturing technology that can increase the energy density of electric vehicle batteries and reduce safety risks. The technology described in this application involves adding a distribution system, such as a distribution nozzle / head, to the slitting process. According to the new process requirements, this not only enables the application of a very thin special adhesive, such as a conductive adhesive, on the sheet surface of the electrode lugs, but also protects the outer edges of the electrode sheet strip obtained after slitting by edge sealing, such as a coating.

[0087] In the solution of this disclosure, a new adhesive is formed by mixing electrode material and a conductive adhesive in a specific manner. The adhesive conducts electricity and coats the surface of the electrode sheet in a very thin layer. By using the distribution system and nozzle assembly of this disclosure, the coating thickness can be controlled to be between 20 and 30 μm or even thinner. As a result, low coating quality is achieved while effectively protecting the electrode lugs.

[0088] As shown in Figures 12-13, the continuous electrode sheet slitting and coating process is finely tuned to avoid directly coating the very thin outer edge of the electrode sheet strip obtained after slitting. In one embodiment, the sheet remains as a whole after the sheet slitting process. A fluid such as liquid adhesive is then rubbed onto the surface of the edge 102 by the tip of a nozzle and pushed into the slit 1023. Next, the other side of the sheet is subjected to a similar coating process. Finally, the fluid can penetrate the slit 1023, thereby completely sealing the entire narrow outer edge of the electrode sheet strip.

[0089] The size of the slit 1023 in the sheet can be optimized according to the actual need to obtain the best edge sealing effect. For example, the size of the slit 1023 can be determined by the edge thickness, the fluid application temperature, the sheet transfer speed, etc. The distribution system can be mounted directly on the slitting machine or separately in front of the slitting machine in the sheet's forward direction. This allows coating to be applied to both the surface and sides of the sheet after slitting. This provides a completely new method for coating the outer edges of the electrode tabs of lithium-ion battery electrode sheets, which is entirely different from existing coating methods.

[0090] Alternatively, the nozzle assembly and / or distribution system according to this disclosure can be used to directly coat an electrode sheet strip as shown in Figure 11. In this case, it is necessary to strictly control the adhesive output and coating speed to avoid contamination of the feed roller as much as possible.

[0091] Furthermore, at the stepped portion 103 between the main body portion 101 and the edge portion 102 of the sheet, a separate coating process can be performed to protect the surface of the stepped portion. This avoids the use of adhesive tape. In addition, the width of the nozzle edge of the nozzle assembly can be selected and kept constant, so that the coating width can be consistently maintained when the fluid is distributed onto the substrate, and by setting / selecting the recess depth of the recess 73 of the nozzle assembly, an adhesive thickness of less than 30 μm, preferably 20 μm, can be achieved.

[0092] This disclosure provides a strip coating distribution system combined with improvements to the electrode sheet manufacturing process, which offers the best equipment and technical solution for accurately and consistently applying an extremely thin adhesive layer of less than 30 μm, preferably less than 20 μm, to electrode sheets used to manufacture sheet electrodes, as well as completely sealing the outer edges of the sheets.

[0093] This disclosure also relates to electrode sheet strips. Electrode sheet strips are obtained through the novel slitting and edge sealing processes described above. This disclosure also relates to electrodes for a chip battery comprising multiple electrode segments, wherein the electrode segments are manufactured from electrode sheet strips obtained according to the above method. Multiple electrode segments are stacked together to form an electrode. This disclosure also relates to a chip battery comprising an electrode obtained by stacking electrode segments obtained by the above method. The performance and safety of electric vehicles equipped with such batteries can be significantly improved.

[0094] Specific embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. It is anticipated that various changes and modifications may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the accompanying claims. [Explanation of Symbols]

[0095] 1 motor 2 Top plate 21 Vertical channel 22 Horizontal channel 23 Vertical channel 3 Weighing assembly 31 Drive gear 32 Driven gear 4 Gear support plate 5 Bottom plate 51 sealing grooves 52 Vertical channel 53 Horizontal channel 54 Protrusion 541 Joint surface 6 Cover plate 65 Guide Boss 651 steps 7 Lip component 70 Main body 71 Rectangular opening 72 Dam components 721 Reservoir 722 Reservoir 73 recess 74 Boss 75 Guide Boss 8 Sealing member 81 Central opening 9 Supply container 10 electrode sheets 101 Main body 102 Edge 1021 Ears 1022 Notch 1023 Slit 103 Stepped section 10' electrode sheet strip 11 Control Assembly

Claims

1. A nozzle assembly, A lip member comprising an annular main body and a dam member in the center, wherein the dam member extends from the lower edge to the upper edge of the rectangular space enclosed by the main body so as to form a rectangular opening between the upper edge of the dam member and the upper edge of the rectangular space, the dam member extends laterally across the entire width of the rectangular opening, and the rectangular opening is adapted to receive fluid, The system includes a cover plate configured to be connected to the lip member, The dam member is recessed relative to the surface of the lip member connected to the cover plate, such that a reservoir is formed between the cover plate and the dam member, and the reservoir is in fluid communication with the rectangular opening. A recess is provided on one of the two opposing surfaces of the cover plate and the lip member. The recess is in fluid communication with the reservoir so that the fluid can flow out of the reservoir in a strip-like manner through the recess. The nozzle assembly is characterized in that the recess is recessed by 50 μm to 150 μm relative to the surface on which the recess is provided.

2. The nozzle assembly according to claim 1, characterized in that the recess is provided on the surface of the lip member facing the cover plate, and in the lateral direction, the width of the recess is less than or equal to the width of the dam member.

3. The nozzle assembly according to claim 1 or 2, characterized in that the dam member is recessed relative to the surface of the lip member on the side opposite to the cover plate.

4. The nozzle assembly according to claim 1 or 2, characterized in that a boss for receiving a sealing member is provided on the outer edge of the side surface of the lip member opposite to the cover plate.

5. The nozzle assembly according to claim 1 or 2, characterized in that a guide boss is provided on the bottom surface of the cover plate and / or the bottom surface of the lip member.

6. The nozzle assembly according to claim 1 or 2, characterized in that the cover plate and the lip member are fixed together by screws.

7. It is a distribution system, Fluid supply assembly and This is a volumetric cavity pump configuration comprising a metering assembly configured to communicate with the fluid supply assembly and receive fluid from the fluid supply assembly, The assembly includes a nozzle assembly that is in fluid communication with the metering assembly in order to receive the fluid from the metering assembly, The nozzle assembly is the nozzle assembly described in claim 1 or 2, and the distribution system is characterized in that

8. The distribution system according to claim 7, characterized in that the fluid supply assembly includes a supply container configured to house a fluid cartridge or to be connected to a pipe for supplying the fluid.

9. The distribution system according to claim 7, characterized in that the weighing assembly includes a drive gear and a driven gear.

10. The aforementioned weighing assembly is An upper plate having an upper plate channel for receiving the fluid from the fluid supply assembly, The nozzle assembly has a rectangular opening and a bottom plate having a bottom plate channel that communicates with the fluid, The distribution system according to claim 9, further comprising a gear support plate disposed between the upper plate and the bottom plate, having an opening in the center for housing the drive gear and the driven gear.

11. The distribution system according to claim 10, characterized in that the gear shafts of the driving gear and the driven gear are inserted into corresponding holes in the bottom plate in order to provide positioning of the gear shafts.

12. The distribution system according to claim 10, characterized in that the gap between the drive gear and the driven gear on one side of the weighing assembly is in fluid communication with the upper plate flow path of the upper plate, and the gap between the drive gear and the driven gear on the other side of the weighing assembly is in fluid communication with the bottom plate flow path of the bottom plate.

13. The distribution system according to claim 10, characterized in that a sealing member is provided between the gear support plate and the bottom plate, and the sealing member surrounds the opening of the gear support plate.

14. The distribution system according to claim 10, characterized in that the lip member of the nozzle assembly is connected to the bottom plate such that the upper edge of the dam member is higher than the outlet of the bottom plate flow path.

15. The distribution system according to claim 10, characterized in that a sealing member is provided between the lip member and the bottom plate, and the sealing member has a rectangular central opening.

16. The distribution system according to claim 15, characterized in that the width of the central opening is greater than or equal to the width of the rectangular opening, and the height of the central opening is greater than or equal to the distance from the upper edge of the rectangular opening to the lower edge of the outlet of the bottom plate channel of the bottom plate.

17. The distribution system according to claim 10, characterized in that the bottom plate has a protrusion on which an outlet for the bottom plate flow path of the bottom plate is provided, and the protrusion is adapted to be connected to the lip member.

18. A method for distributing a fluid onto a substrate using the distribution system described in claim 7, wherein the substrate has a thin portion, and the method comprises distributing the fluid onto the thin portion of the substrate using the distribution system.

19. The substrate is an electrode sheet for manufacturing battery electrodes, The electrode sheet has a thick main body and a thin edge portion. The aforementioned edge portion is located on the side of the main body portion and is continuous with the main body portion. The method according to claim 18, wherein the method comprises using the distribution system to distribute the fluid onto the surface of the edge to produce an electrode sheet strip.

20. The method according to claim 19, comprising: supplying the electrode sheet to a slitting machine; slitting the edge along a slit path using the slitting machine; and distributing the fluid onto the surface of the edge after slitting using the distribution system to produce the electrode sheet strip.

21. The method according to claim 20, characterized in that the slitting machine starts the slitting process at a certain distance from the leading edge of the electrode sheet and ends the slitting process at a certain distance from the rear end of the electrode sheet.

22. The method according to claim 21, characterized in that the edge of the electrode sheet has a slit width such that the slit width on the edge is suitable for the fluid from the distribution system to completely pass through the slit.

23. The method according to 22, characterized in that the width of the slit is determined according to the thickness of the edge, the application temperature of the fluid, or the sheet supply speed.

24. The method according to claim 20, characterized in that the slit path is non-linear.

25. The method according to claim 24, characterized in that the edge portion is a slit that forms a plurality of electrode ear portions along the slit path.

26. An electrode sheet strip for manufacturing electrodes for a cell, wherein the electrode sheet strip is manufactured using the method described in claim 19.

27. The electrode sheet strip according to claim 26, characterized in that the electrode sheet strip is cut into a plurality of sheet segments having the same shape along the width direction, and the plurality of sheet segments are stacked together to form the electrode.

28. An electrode characterized by being manufactured from the electrode sheet strip described in claim 26.

29. The electrode according to claim 28, characterized in that the electrode is the anode or cathode of a cell.

30. A method for distributing a fluid onto a substrate using a distribution system, The distribution system is Fluid supply assembly and This is a volumetric cavity pump configuration comprising a metering assembly configured to communicate with the fluid supply assembly and receive fluid from the fluid supply assembly, The assembly includes a nozzle assembly that is in fluid communication with the metering assembly in order to receive the fluid from the metering assembly, The nozzle assembly is A lip member comprising an annular main body and a dam member in the center, wherein the dam member extends from the lower edge to the upper edge of the rectangular space enclosed by the main body so as to form a rectangular opening between the upper edge of the dam member and the upper edge of the rectangular space, the dam member extends laterally across the entire width of the rectangular opening, and the rectangular opening is adapted to receive fluid, The system includes a cover plate configured to be connected to the lip member, The dam member is recessed relative to the surface of the lip member connected to the cover plate, such that a reservoir is formed between the cover plate and the dam member, and the reservoir is in fluid communication with the rectangular opening. A recess is provided on one of the two opposing surfaces of the cover plate and the lip member. The recess is in fluid communication with the reservoir so that the fluid can flow out of the reservoir in a strip-like manner through the recess. The substrate has a thin portion, and the method includes distributing a fluid onto the thin portion of the substrate using the distribution system. The substrate is an electrode sheet for manufacturing battery electrodes, The electrode sheet has a thick main body and a thin edge portion. The aforementioned edge portion is located on the side of the main body portion and is continuous with the main body portion. The method includes using the distribution system to distribute the fluid onto the surface of the edge to manufacture an electrode sheet strip, The process includes supplying the electrode sheet to a slitting machine, slitting the edge along a slit path using the slitting machine, and distributing the fluid onto the surface of the edge after slitting using the distribution system to produce the electrode sheet strip. The slitting machine includes a method that starts slitting at a certain distance from the leading edge of the electrode sheet and ends slitting at a certain distance from the rear edge of the electrode sheet.

31. The edge of the electrode sheet is such that the width of the slit on the edge is suitable for the fluid from the distribution system to completely pass through the slit, The method according to claim 30, characterized in that the fluid is rubbed onto the surface of the edge by the tip of the nozzle assembly and pushed into the slit.

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