Pole manufacturing equipment

Abstract

A pole piece manufacturing device (10) relates to the field of batteries. The pole piece manufacturing device (10) comprises a film forming mechanism (100), a composite mechanism (400), a detection mechanism (200) and an adjustment mechanism (300). The film forming mechanism (100) is used to form an active material (500) into a membrane (600). The composite mechanism (400) is arranged downstream of the film forming mechanism (100). The composite mechanism (400) is used to composite the membrane (600) and a substrate (700) into a pole piece (800). The detecting mechanism (200) is arranged upstream of the composite mechanism (400), the detecting mechanism (200) is used to detect the thickness or unit area weight of the membrane (600), the regulating mechanism (300) is connected to the membrane forming mechanism (100), the regulating mechanism (300) is in communication connection with the detecting mechanism (200), and the regulating mechanism (300) is used to adjust the membrane forming mechanism (100) according to the detection result of the detecting mechanism (200) so as to control the thickness or unit area weight of the membrane (600) within a preset range.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a pole piece manufacturing device. Background Art

[0002] Batteries are widely used in new energy applications, such as electric vehicles and new energy vehicles. These have become a new trend in the automotive industry. Batteries include electrode assemblies, which are the components within the battery where electrochemical reactions occur. Electrode assemblies are primarily composed of wound or stacked positive and negative electrode sheets.

[0003] Currently, the manufacturing of electrodes is mainly divided into wet technology and dry technology. However, the yield rate of electrodes manufactured by dry technology is relatively low. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a pole piece manufacturing device, which aims to improve the problem of low pole piece yield produced by dry process technology in related art.

[0005] In the first aspect, an embodiment of the present application provides a pole piece manufacturing device, which includes a film forming mechanism, a composite mechanism, a detection mechanism and an adjustment mechanism, wherein the film forming mechanism is used to form the active material into a film; the composite mechanism is arranged downstream of the film forming mechanism, and the composite mechanism is used to composite the film and the substrate into a pole piece; the detection mechanism is arranged upstream of the composite mechanism, and the detection mechanism is used to detect the thickness or unit area weight of the film; the adjustment mechanism is connected to the film forming mechanism, and the adjustment mechanism is communicatively connected to the detection mechanism, and the adjustment mechanism is used to adjust the film forming mechanism according to the detection result of the detection mechanism to control the thickness or unit area weight of the film within a preset range.

[0006] In the above technical solution, a membrane forming mechanism forms the active material into a membrane sheet, which is then combined with the substrate and membrane sheet by a composite mechanism to produce a pole piece. This pole piece manufacturing device utilizes a detection mechanism located upstream of the composite mechanism to inspect the membrane sheet formed by the membrane forming mechanism and determine whether the membrane sheet meets the design requirements. If it does not, the adjustment mechanism promptly adjusts the membrane forming mechanism to ensure that the membrane sheet meets the design requirements. This improves the yield rate of the membrane sheet, resulting in a high yield rate for pole pieces produced using this membrane sheet.

[0007] As an optional technical solution of an embodiment of the present application, the film forming mechanism includes a first pressing roller and a second pressing roller, and the first pressing roller and the second pressing roller cooperate to roller-press the active material into the film; the adjustment mechanism connects the first pressing roller and / or the second pressing roller, and the adjustment mechanism is used to adjust the gap between the first pressing roller and the second pressing roller according to the detection results of the detection mechanism.

[0008] In the above technical solution, the first and second rollers can cooperate to roll-press the active material to form the active material into a membrane. The gap between the first and second rollers can affect the thickness or weight per unit area of ​​the membrane. For example, when the gap between the first and second rollers is larger, the thickness or weight per unit area of ​​the membrane is also larger. When the gap between the first and second rollers is smaller, the thickness or weight per unit area of ​​the membrane is also smaller. An adjustment mechanism can be connected to at least one of the first and second rollers to drive at least one of the first and second rollers toward or away from the other, thereby reducing or increasing the gap between the first and second rollers. When the detection mechanism detects that the thickness or weight per unit area of ​​the membrane is larger, the adjustment mechanism can reduce the gap between the first and second rollers. When the detection mechanism detects that the thickness or weight per unit area of ​​the membrane is smaller, the adjustment mechanism can increase the gap between the first and second rollers to control the thickness or weight per unit area of ​​the membrane within a preset range, so that the thickness or weight per unit area of ​​the membrane meets the design requirements.

[0009] As an optional technical solution of an embodiment of the present application, the composite mechanism includes a composite roller, and the composite roller cooperates with the second pressing roller to roll the diaphragm and the substrate to composite the diaphragm and the substrate into the pole piece.

[0010] In the above technical solution, the composite roller cooperates with the second pressing roller to roll the membrane and the substrate to composite the membrane and the substrate into a pole piece. The second pressing roller serves as both a component for rolling the active material and a component for composite the membrane and the substrate. One component realizes two functions, simplifies the structure of the pole piece manufacturing device, and reduces the cost of the pole piece manufacturing device.

[0011] As an optional technical solution of an embodiment of the present application, the adjustment mechanism is connected to the first pressure roller, and the adjustment mechanism is used to adjust the position of the first pressure roller to adjust the gap between the first pressure roller and the second pressure roller.

[0012] In the above technical solution, since the second pressing roller needs to cooperate with the laminating roller to press the film and substrate, if the adjustment mechanism adjusts the position of the second pressing roller, the gap between the laminating roller and the second pressing roller may change, resulting in a poor laminating effect. Therefore, by adjusting the position of the first pressing roller through the adjustment mechanism, the gap between the first and second pressing rollers can be adjusted while maintaining the laminating gap between the second pressing roller and the laminating roller, so that the film formed by the film forming mechanism meets the design requirements.

[0013] As an optional technical solution of the embodiment of the present application, the diaphragm has a winding area wound around the second pressure roller, and the detection mechanism has a detection end, which faces the winding area.

[0014] In the above technical solution, the detection end faces the winding area to realize the detection of the thickness of the diaphragm or the weight per unit area. The winding area of ​​the diaphragm is close to the second pressure roller, and there will be no swinging, offset and other conditions that interfere with the measurement, so that the detection mechanism can detect the thickness of the diaphragm or the weight per unit area more accurately.

[0015] As an optional technical solution of the embodiment of the present application, along the circumference of the second pressing roller, the first pressing roller is closer to the detection mechanism than the composite roller.

[0016] In the above technical solution, the active material is formed into a membrane after being rolled by the first and second rollers. The membrane is then transported between the second roller and the laminating roller to be laminated with the substrate. If the detection mechanism detects that the membrane does not meet the design requirements, then the entire section of the membrane between the first roller and the detection mechanism along the circumference of the second roller will also not meet the design requirements. If the detection mechanism is positioned closer to the first roller, when the detection mechanism detects that the membrane does not meet the design requirements, the adjustment mechanism can promptly adjust the membrane forming mechanism to shorten the length of the membrane that does not meet the design requirements.

[0017] As an optional technical solution of an embodiment of the present application, the first pressure roller, the second pressure roller and the composite roller are arranged along a first direction; along the first direction, the second pressure roller is located between the first pressure roller and the composite roller, and the first direction is perpendicular to the axial direction of the second pressure roller.

[0018] In the above technical solution, the first pressing roller, the second pressing roller, and the composite roller are arranged along the first direction. The second pressing roller can cooperate with the first pressing roller to press the active material to form a membrane. It can also cooperate with the composite roller to press the membrane and substrate to combine the membrane and substrate into an electrode. The second pressing roller can also transport the formed membrane between the second pressing roller and the composite roller. This allows a single component to perform multiple functions, resulting in a simple and cost-effective electrode manufacturing device. In addition, arranging the first pressing roller, the second pressing roller, and the composite roller along the first direction can also reduce the space occupied by the membrane forming mechanism, thereby improving the space utilization rate of the membrane forming mechanism.

[0019] As an optional technical solution of the embodiment of the present application, the detection mechanism is a laser thickness gauge, a beta-ray weighing gauge or an x-ray weighing gauge.

[0020] In the above technical solution, a laser thickness gauge can be used to conveniently measure the thickness of the membrane. A beta-ray weighing instrument can be used to measure the weight per unit area of ​​the membrane of the positive electrode. An x-ray weighing instrument can be used to measure the weight per unit area of ​​the membrane of the negative electrode.

[0021] As an optional technical solution of an embodiment of the present application, the film forming mechanism includes a third pressing roller, and the first pressing roller and the third pressing roller cooperate to press the active substance.

[0022] In the above technical solution, the third roller and the first roller can achieve primary rolling of the active material, while the first roller and the second roller can achieve secondary rolling of the active material. Through multi-stage rolling, the active material can be gradually formed into a membrane, and the degree of rolling each time is not too large, which is conducive to improving the uniformity and thickness consistency of the membrane, thereby improving the performance of the membrane. As a result, the yield rate of the electrode made with this membrane is higher.

[0023] As an optional technical solution of an embodiment of the present application, a first rolling gap is formed between the first pressing roller and the second pressing roller, and a second rolling gap is formed between the first pressing roller and the third pressing roller. The active material passes through the second rolling gap and the first rolling gap in sequence, and the width of the first rolling gap is smaller than the width of the second rolling gap.

[0024] In the above technical solution, by making the width of the first rolling gap smaller than the width of the second rolling gap, it is beneficial to gradually roll the active material to thin it, so that the degree of thinning each time is not too large, which is beneficial to improve the uniformity and thickness consistency of the membrane.

[0025] As an optional technical solution of an embodiment of the present application, the adjustment mechanism connects the first pressure roller and the third pressure roller, and the adjustment mechanism is used to adjust the positions of the first pressure roller and the third pressure roller according to the detection results of the detection mechanism, so as to adjust the width of the first roller pressure gap while keeping the second roller pressure gap unchanged.

[0026] In the above technical solution, the first roller gap is the gap in the final film, while the second roller gap is the gap in the semi-finished film. If the detection mechanism detects that the film does not meet the design requirements, only the first roller gap needs to be adjusted. To ensure that the second roller gap is not affected when adjusting the first roller gap, the first and third rollers are both connected to an adjustment mechanism. The adjustment mechanism drives the first and third rollers to move simultaneously, so that the first and third rollers are relatively stationary, while the first and second rollers move relative to each other.

[0027] As an optional technical solution of an embodiment of the present application, the film forming mechanism includes a first pressing roller and a second pressing roller, and the first pressing roller and the second pressing roller cooperate to roller-press the active material into the film; the adjustment mechanism is connected to the first pressing roller and / or the second pressing roller, and the adjustment mechanism is used to increase or decrease the pressure applied to the first pressing roller and / or the second pressing roller according to the detection results of the detection mechanism.

[0028] In the above technical solution, if the detection mechanism detects that the thickness or weight per unit area of ​​the membrane sheet is small, the adjustment mechanism reduces the pressure applied to the first and / or second pressing rollers, thereby reducing the roller pressure of the first and / or second pressing rollers in contact with the active material, thereby increasing the thickness or weight per unit area of ​​the membrane sheet. If the detection mechanism detects that the thickness or weight per unit area of ​​the membrane sheet is large, the adjustment mechanism increases the pressure applied to the first and / or second pressing rollers, thereby increasing the roller pressure of the first and / or second pressing rollers in contact with the active material, thereby reducing the thickness or weight per unit area of ​​the membrane sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic block diagram of a pole piece manufacturing apparatus provided in some embodiments of the present application;

[0031] Figure 2A schematic structural diagram of a pole piece manufacturing device provided in some embodiments of the present application;

[0032] Figure 3 A schematic structural diagram of a pole piece manufacturing device (the adjustment mechanism is connected to the second pressing roller and the composite roller) provided in some embodiments of the present application;

[0033] Figure 4 A schematic structural diagram of a pole piece manufacturing device (the adjustment mechanism is connected to the second pressing roller) provided in some embodiments of the present application;

[0034] Figure 5 A schematic structural diagram of a pole piece manufacturing device (the detection end is not opposite to the winding area) provided in some embodiments of the present application;

[0035] Figure 6 A schematic structural diagram of a pole piece manufacturing device (with the detection mechanism close to the composite roller) provided in some embodiments of the present application;

[0036] Figure 7 A schematic structural diagram of a pole piece manufacturing device (including a third pressing roller) provided in some embodiments of the present application.

[0037] Icons: 10-pole piece manufacturing device; 100-membrane forming mechanism; 110-first pressing roller; 120-second pressing roller; 130-third pressing roller; 200-detection mechanism; 300-adjustment mechanism; 310-driving member; 320-connecting member; 321-first connecting part; 322-second connecting part; 323-third connecting part; 400-combining mechanism; 410-combining roller; 500-active substance; 600-diaphragm; 700-substrate; 800-pole piece. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0041] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0046] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0047] Batteries include electrode assemblies, the components where electrochemical reactions occur. These assemblies are primarily composed of wound or stacked positive and negative electrode sheets. The inventors noted that electrode sheet manufacturing is primarily categorized into wet and dry processes. However, dry processes have a lower yield rate for electrode sheet production.

[0048] The inventors further discovered that when using dry-process technology to manufacture electrode sheets, active material powder and particles are fed to the surface of a roller, directly rolled into a membrane, and then the membrane is laminated with a substrate to form the electrode sheet. During this process, the membrane quality is not tested, and the rolling mechanism is not adjusted according to production conditions. As a result, many of the produced membranes do not meet design requirements, and the yield rate of electrode sheets produced using such membranes is low.

[0049] In light of this, embodiments of the present application provide a pole piece manufacturing apparatus. A detection mechanism is provided upstream of a composite mechanism to inspect the pole piece formed by a film forming mechanism to determine whether the pole piece meets design requirements. If not, an adjustment mechanism promptly adjusts the pole piece forming mechanism to ensure that the pole piece meets design requirements. This improves the yield rate of the pole piece, resulting in a high yield rate for pole pieces produced using the pole piece.

[0050] The technical solution described in the embodiments of this application is applicable to the manufacture of pole pieces.

[0051] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic block diagram of a pole piece manufacturing device 10 provided in some embodiments of the present application. Figure 2A schematic structural diagram of a pole piece manufacturing device 10 provided for some embodiments of the present application. An embodiment of the present application provides a pole piece manufacturing device 10, which includes a film forming mechanism 100, a composite mechanism 400, a detection mechanism 200, and an adjustment mechanism 300. The film forming mechanism 100 is used to form an active material 500 into a diaphragm 600. The composite mechanism 400 is arranged downstream of the film forming mechanism 100, and the composite mechanism 400 is used to composite the diaphragm 600 with a substrate 700 into a pole piece 800. The detection mechanism 200 is arranged upstream of the composite mechanism 400, and the detection mechanism 200 is used to detect the thickness or unit area weight of the diaphragm 600. The adjustment mechanism 300 is connected to the film forming mechanism 100, and the adjustment mechanism 300 is in communication connection with the detection mechanism 200. The adjustment mechanism 300 is used to adjust the film forming mechanism 100 according to the detection result of the detection mechanism 200, so as to control the thickness or unit area weight of the diaphragm 600 within a preset range.

[0052] The film forming mechanism 100 forms the active material 500 into a film 600. The film forming mechanism 100 includes, but is not limited to, a roll forming mechanism, an extrusion forming mechanism, and the like. The active material 500 of the positive and negative electrode sheets differs. For example, the active material 500 of the positive electrode sheet can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The active material 500 of the negative electrode sheet can be carbon or silicon, for example.

[0053] The composite structure 400 combines the membrane 600 and substrate 700 to form the electrode 800. From the perspective of the electrode 800, the membrane 600 is the active material layer of the electrode 800, and the substrate 700 is the current collector of the electrode 800. The substrate 700 of the positive electrode can be aluminum. The substrate 700 of the negative electrode can be copper.

[0054] The inspection mechanism 200 is capable of inspecting the film sheet 600 formed by the film forming mechanism 100 to determine whether the thickness or weight per unit area of ​​the film sheet 600 meets the design requirements. It should be noted that the inspection mechanism 200 is located upstream of the laminating mechanism 400. This means that the inspection mechanism 200 inspects the film sheet 600 before laminating by the laminating mechanism 400, not after laminating.

[0055] The adjustment mechanism 300 is a mechanism capable of adjusting the molding condition of the film forming mechanism 100 based on the detection results of the detection mechanism 200. "The adjustment mechanism 300 is in communication with the detection mechanism 200" includes the adjustment mechanism 300 being connected to the detection mechanism 200 via a wired connection method such as a wire or a network cable, and also includes the adjustment mechanism 300 being connected to the detection mechanism 200 via a wireless connection method such as Bluetooth or a wireless network. The adjustment mechanism 300 can be directly connected to the detection mechanism 200, or it can be indirectly connected to the detection mechanism 200 through an intermediate component. For example, the intermediate component can be a controller, the detection mechanism 200 is electrically connected to the controller, and the controller is electrically connected to the adjustment mechanism 300. The controller receives the detection results of the detection mechanism 200 and controls the adjustment mechanism 300 to adjust the film forming mechanism 100 based on the detection results, so as to control the thickness or unit area weight of the film sheet 600 formed by the film forming mechanism 100 within a preset range.

[0056] The weight per unit area refers to the weight per unit area of ​​the diaphragm 600. For example, 100 mm 2 The weight inside.

[0057] The membrane forming mechanism 100 can form the active material 500 into a membrane 600, and then the substrate 700 and the membrane 600 are combined through the composite mechanism 400 to obtain the electrode 800. The electrode manufacturing device 10 uses a detection mechanism 200 provided upstream of the composite mechanism 400 to detect the membrane 600 formed by the membrane forming mechanism 100 and determine whether the membrane 600 formed by the membrane forming mechanism 100 meets the design requirements. If it does not meet the design requirements, the membrane forming mechanism 100 is promptly adjusted through the adjustment mechanism 300 to ensure that the membrane 600 formed by the membrane forming mechanism 100 meets the design requirements. This improves the yield rate of the membrane 600, and ensures that the electrode 800 produced using the membrane 600 has a high yield rate.

[0058] In some embodiments, the film forming mechanism 100 includes a first pressing roller 110 and a second pressing roller 120, which cooperate to roll-press the active material 500 into a film sheet 600. The adjustment mechanism 300 is connected to the first pressing roller 110 and / or the second pressing roller 120 and is configured to adjust the gap between the first pressing roller 110 and the second pressing roller 120 based on the detection results of the detection mechanism 200.

[0059] The first pressing roller 110 and the second pressing roller 120 are both roller structures. There is a gap between the first pressing roller 110 and the second pressing roller 120 for the active material 500 to pass through. When the active material 500 passes through the gap, it is squeezed by the first pressing roller 110 and the second pressing roller 120 and formed into a membrane 600.

[0060] The term "the adjustment mechanism 300 is connected to the first pressing roller 110 and / or the second pressing roller 120" includes three situations: the adjustment mechanism 300 is connected to the first pressing roller 110, the adjustment mechanism 300 is connected to the second pressing roller 120, and the adjustment mechanism 300 is connected to both the first pressing roller 110 and the second pressing roller 120. The adjustment mechanism 300 can adjust the position of at least one of the first pressing roller 110 and the second pressing roller 120 to adjust the gap between the first pressing roller 110 and the second pressing roller 120, thereby controlling the thickness or weight per unit area of ​​the film sheet 600 formed by the film forming mechanism 100.

[0061] The first and second rollers 110, 120 can cooperate to roll-press the active material 500 to form the active material 500 into a film 600. The gap between the first and second rollers 110, 120 affects the thickness or weight per unit area of ​​the film 600. For example, when the gap between the first and second rollers 110, 120 is larger, the thickness or weight per unit area of ​​the film 600 is also larger. When the gap between the first and second rollers 110, 120 is smaller, the thickness or weight per unit area of ​​the film 600 is also smaller. The adjustment mechanism 300 can be connected to at least one of the first and second rollers 110, 120 to drive at least one of the first and second rollers 110, 120 toward or away from the other, thereby reducing or increasing the gap between the first and second rollers 110, 120. When the detection mechanism 200 detects that the thickness or weight per unit area of ​​the film 600 is larger, the adjustment mechanism 300 can reduce the gap between the first and second rollers 110, 120. When the detection mechanism 200 detects that the thickness or unit area weight of the diaphragm 600 is small, the adjustment mechanism 300 can increase the gap between the first pressure roller 110 and the second pressure roller 120 to control the thickness or unit area weight of the diaphragm 600 within a preset range, so that the thickness or unit area weight of the diaphragm 600 meets the design requirements.

[0062] Please refer to Figure 2 In some embodiments, the composite mechanism 400 includes a composite roller 410 , which cooperates with the second pressing roller 120 to roll the film 600 and the substrate 700 to composite the film 600 and the substrate 700 into a pole piece 800 .

[0063] The composite roller 410 is a roller structure used to composite the film 600 and the substrate 700. A gap is defined between the composite roller 410 and the second pressure roller 120 for the film 600 and the substrate 700 to pass through. As the film 600 and the substrate 700 pass through the gap between the composite roller 410 and the second pressure roller 120, they are compacted by the composite roller 410 and the second pressure roller 120. In other words, the composite roller 410 and the second pressure roller 120 cooperate to composite the film 600 and the substrate 700, thereby reducing the number of composite rollers 410. In some embodiments, the composite mechanism 400 may include multiple composite rollers 410, which cooperate to roll and press the film 600 and the substrate 700 to composite them.

[0064] The composite roller 410 cooperates with the second pressing roller 120 to roll the membrane 600 and the substrate 700 to composite the membrane 600 and the substrate 700 into the electrode 800. The second pressing roller 120 serves as both a component for rolling the active material 500 and a component for composite the membrane 600 and the substrate 700. One component realizes two functions, simplifies the structure of the electrode manufacturing device 10, and reduces the cost of the electrode manufacturing device 10.

[0065] Please refer to Figure 2 In some embodiments, the adjustment mechanism 300 is connected to the first pressing roller 110 , and the adjustment mechanism 300 is used to adjust the position of the first pressing roller 110 to adjust the gap between the first pressing roller 110 and the second pressing roller 120 .

[0066] The adjustment mechanism 300 may include a driving member 310 and a connecting member 320, wherein the connecting member 320 connects the driving member 310 and the first pressing roller 110. The driving member 310 drives the connecting member 320 to operate, and the connecting member 320 transmits the power of the driving member 310 to drive the first pressing roller 110 toward or away from the second pressing roller 120, thereby adjusting the gap between the first pressing roller 110 and the second pressing roller 120.

[0067] Since the second pressing roller 120 needs to cooperate with the laminating roller 410 to roll the film 600 and substrate 700, if the adjustment mechanism 300 adjusts the position of the second pressing roller 120, the gap between the laminating roller 410 and the second pressing roller 120 may change, resulting in a poor laminating effect. Therefore, by adjusting the position of the first pressing roller 110 through the adjustment mechanism 300, the gap between the first pressing roller 110 and the second pressing roller 120 can be adjusted while maintaining the laminating gap between the second pressing roller 120 and the laminating roller 410. This ensures that the film 600 formed by the film forming mechanism 100 meets the design requirements.

[0068] Please refer to Figure 3 , Figure 3Schematic diagram of the structure of the pole piece manufacturing apparatus 10 (adjustment mechanism 300 connected to the second pressure roller 120 and the composite roller 410) provided in some embodiments of the present application. In some embodiments, the adjustment mechanism 300 is connected to the second pressure roller 120 and the composite roller 410, and the adjustment mechanism 300 is used to adjust the position of the second pressure roller 120 and the composite roller 410 to adjust the gap between the first pressure roller 110 and the second pressure roller 120.

[0069] The adjustment mechanism 300 may include a driving member 310 and a connecting member 320, wherein the connecting member 320 connects the driving member 310, the first pressure roller 110, and the composite roller 410. For example, the connecting member 320 includes a first connecting portion 321, a second connecting portion 322, and a third connecting portion 323. The first connecting portion 321 is connected to the output end of the driving member 310, and the second connecting portion 322 and the third connecting portion 323 are both connected to the first connecting portion 321. The second connecting portion 322 is connected to the second pressure roller 120, and the third connecting portion 323 is connected to the composite roller 410. When the driving member 310 is activated, the first connecting portion 321 drives the second connecting portion 322 and the third connecting portion 323 to operate, and the second connecting portion 322 and the third connecting portion 323 transmit the power to achieve simultaneous movement of the second pressure roller 120 and the composite roller 410.

[0070] When the adjustment mechanism 300 adjusts the positions of the second pressing roller 120 and the composite roller 410, the second pressing roller 120 and the composite roller 410 remain stationary relative to each other, while the second pressing roller 120 and the first pressing roller 110 move relative to each other. In short, when the adjustment mechanism 300 adjusts the positions of the second pressing roller 120 and the composite roller 410, the gap between the second pressing roller 120 and the composite roller 410 remains unchanged, while the gap between the second pressing roller 120 and the first pressing roller 110 changes. This allows the thickness or weight per unit area of ​​the film 600 to be adjusted without affecting the composite of the film 600 and the substrate 700.

[0071] Please refer to Figure 4 , Figure 4 Schematic diagram of the structure of the electrode manufacturing device 10 (the adjustment mechanism 300 is connected to the second pressure roller 120) provided for some embodiments of the present application. In some embodiments, the composite mechanism 400 includes two composite rollers 410, and the two composite rollers 410 cooperate to roll the membrane 600 and the substrate 700 to composite the membrane 600 and the substrate 700 into the electrode 800. At this time, since the composite roller 410 does not need to cooperate with the second pressure roller 120, changing the position of the second pressure roller 120 alone will not affect the composite of the substrate 700 and the membrane 600. Therefore, the adjustment mechanism 300 can be connected only to the second pressure roller 120, and by changing the position of the second pressure roller 120, the gap between the second pressure roller 120 and the first pressure roller 110 is changed to achieve the adjustment of the thickness or unit area weight of the membrane 600.

[0072] Please refer to Figures 2 to 4 In some embodiments, the film 600 has a winding area wound around the second pressing roller 120. The detection mechanism 200 has a detection end facing the winding area.

[0073] When the first and second rollers 110, 120 cooperate to roll-press the active material 500, the first and second rollers 110, 120 can be configured to rotate at differential speeds. For example, if the first and second rollers 110, 120 have the same roller diameter, the second roller 120 can rotate at a speed greater than that of the first roller 110. This allows the film 600 formed by roll-pressing the first and second rollers 110, 120, to be easily transferred and wound onto the second roller 120, preventing the film 600 from randomly shifting and causing tears or unevenness in the rolled film 600.

[0074] The detection end faces the winding area to detect the thickness or unit area weight of the diaphragm 600. The winding area of ​​the diaphragm 600 is close to the second pressure roller 120, and there will be no shaking, offset, etc. to interfere with the measurement, so that the detection mechanism 200 can detect the thickness or unit area weight of the diaphragm 600 more accurately.

[0075] Please refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of the electrode manufacturing device 10 (the detection end is not opposite to the winding area) provided in some embodiments of the present application. Figure 5 As shown, the detection end of the detection mechanism 200 may not face the winding area. Figure 5 In the embodiment, the detection end of the detection mechanism 200 is opposite to the suspended portion of the diaphragm 600 to detect the thickness or weight per unit area of ​​the diaphragm 600.

[0076] Please refer to Figures 2 to 4 In some embodiments, along the circumference of the second pressing roller 120 , the first pressing roller 110 is closer to the detection mechanism 200 than the composite roller 410 .

[0077] “Along the circumference of the second pressure roller 120 , the first pressure roller 110 is closer to the detection mechanism 200 than the composite roller 410 ” can also be understood as along the circumference of the second pressure roller 120 , the distance from the detection mechanism 200 to the first pressure roller 110 is smaller than the distance from the detection mechanism 200 to the second pressure roller 120 .

[0078] After being rolled by the first and second rollers 110 and 120, the active material 500 is formed into a film 600. The film 600 is then conveyed between the second roller 120 and the laminating roller 410 to be laminated with the substrate 700. If the detection mechanism 200 detects that the film 600 does not meet the design requirements, then the entire section of the film 600 between the first roller 110 and the detection mechanism 200 along the circumference of the second roller 120 will not meet the design requirements. Positioning the detection mechanism 200 closer to the first roller 110 allows the adjustment mechanism 300 to promptly adjust the film forming mechanism 100 when the detection mechanism 200 detects that the film 600 does not meet the design requirements, shortening the length of the film 600 that does not meet the design requirements.

[0079] Please refer to Figure 6 , Figure 6 Schematic diagram of the structure of the electrode manufacturing apparatus 10 (with the detection mechanism 200 close to the composite roller 410) provided in some embodiments of the present application. In some embodiments, along the circumference of the second pressing roller 120, the composite roller 410 is closer to the detection mechanism 200 than the first pressing roller 110. In other words, along the circumference of the second pressing roller 120, the distance from the detection mechanism 200 to the first pressing roller 110 is greater than the distance from the detection mechanism 200 to the second pressing roller 120.

[0080] Please refer to Figures 2 to 6 In some embodiments, the first pressing roller 110 , the second pressing roller 120 , and the composite roller 410 are arranged along a first direction. Along the first direction, the second pressing roller 120 is located between the first pressing roller 110 and the composite roller 410 , and the first direction is perpendicular to the axial direction of the second pressing roller 120 .

[0081] The first direction is any direction perpendicular to the axial direction of the second pressing roller 120. For example, the first direction may be a horizontal direction. In another example, the first direction may be a vertical direction. The first pressing roller 110, the second pressing roller 120, and the composite roller 410 are arranged in sequence in the first direction.

[0082] The first pressing roller 110, the second pressing roller 120 and the composite roller 410 are arranged along the first direction. The second pressing roller 120 can cooperate with the first pressing roller 110 to press the active material 500 to form the membrane 600. It can also cooperate with the composite roller 410 to press the membrane 600 and the substrate 700 to combine the membrane 600 and the substrate 700 into the electrode 800. The second pressing roller 120 can also transport the formed membrane 600 between the second pressing roller 120 and the composite roller 410. One component can play multiple roles, making the electrode manufacturing device 10 simple in structure and low in cost. In addition, arranging the first pressing roller 110, the second pressing roller 120 and the composite roller 410 along the first direction can also reduce the space occupied by the membrane forming mechanism 100 and improve the space utilization rate of the membrane forming mechanism 100.

[0083] In some embodiments, the detection mechanism 200 is a laser thickness gauge, a beta-ray weight gauge, or an x-ray weight gauge.

[0084] A laser thickness gauge can be used to conveniently measure the thickness of the membrane 600. A beta-ray weighing instrument can be used to measure the weight per unit area of ​​the membrane 600 of the positive electrode. An x-ray weighing instrument can be used to measure the weight per unit area of ​​the membrane 600 of the negative electrode.

[0085] Please refer to Figure 7 , Figure 7 Schematic diagram of the structure of the electrode manufacturing device 10 (including the third pressing roller 130) provided in some embodiments of the present application. In some embodiments, the film forming mechanism 100 includes the third pressing roller 130, and the first pressing roller 110 and the third pressing roller 130 cooperate to press the active material 500.

[0086] The third roller 130 is a roller structure. A gap is defined between the first and third rollers 110, 130, through which the active material 500 passes. As the active material 500 passes through this gap, it is squeezed by the first and third rollers 110, 130, and compacted and thinned into a semi-finished membrane 600. The semi-finished membrane 600 is then formed into the membrane 600 by rolling the first and second rollers 110, 120.

[0087] The third pressing roller 130 and the first pressing roller 110 can achieve a primary rolling of the active material 500, while the first pressing roller 110 and the second pressing roller 120 can achieve a secondary rolling of the active material 500. Through multi-stage rolling, the active material 500 can be gradually formed into a membrane 600, and the degree of rolling each time is not too large, which is conducive to improving the uniformity and thickness consistency of the membrane 600, and improving the performance of the membrane 600. As a result, the electrode 800 made using the membrane 600 has a higher yield rate.

[0088] In some embodiments, a first rolling gap is formed between the first rolling roller 110 and the second rolling roller 120. A second rolling gap is formed between the first rolling roller 110 and the third rolling roller 130. The active material 500 passes through the second rolling gap and the first rolling gap in sequence, and the width of the first rolling gap is smaller than the width of the second rolling gap.

[0089] A straight line that lies in the same plane as the axes of the first and second rollers 110, 120 and is perpendicular to the axes of the first and second rollers 110, 120 is referred to as a first straight line. The intersection of the first straight line and the circumferential surface of the first roller 110 is referred to as a first intersection, and the intersection of the first straight line and the circumferential surface of the second roller 120 is referred to as a second intersection. The width of the first rolling gap is the distance between the first and second intersections. The width of the first rolling gap can also be simply understood as the minimum distance between the circumferential surfaces of the first and second rollers 110, 120.

[0090] A straight line that lies in the same plane as the axes of the first and third rollers 110, 130 and is perpendicular to the axes of the first and third rollers 110, 130 is referred to as the second straight line. The intersection of the second straight line with the circumferential surface of the first roller 110 is referred to as the third intersection, and the intersection of the second straight line with the circumferential surface of the third roller 130 is referred to as the fourth intersection. The width of the second rolling gap is the distance between the third and fourth intersections. The width of the second rolling gap can also be simply understood as the minimum distance between the circumferential surfaces of the first and third rollers 110, 130.

[0091] By making the width of the first rolling gap smaller than the width of the second rolling gap, the active material 500 can be gradually rolled and thinned, so that the degree of thinning each time is not too large, which is conducive to improving the uniformity and thickness consistency of the membrane 600.

[0092] Please refer to Figure 7 In some embodiments, the adjustment mechanism 300 is connected to the first pressing roller 110 and the third pressing roller 130. The adjustment mechanism 300 is used to adjust the positions of the first pressing roller 110 and the third pressing roller 130 according to the detection results of the detection mechanism 200, so as to adjust the width of the first pressing gap while keeping the second pressing gap unchanged.

[0093] The adjustment mechanism 300 may include a driving member 310 and a connecting member 320, wherein the connecting member 320 connects the driving member 310, the first pressure roller 110, and the third pressure roller 130. For example, the connecting member 320 includes a first connecting portion 321, a second connecting portion 322, and a third connecting portion 323. The first connecting portion 321 is connected to the output end of the driving member 310, and the second connecting portion 322 and the third connecting portion 323 are both connected to the first connecting portion 321. The second connecting portion 322 is connected to the third pressure roller 130, and the third connecting portion 323 is connected to the first pressure roller 110. When the driving member 310 is activated, the first connecting portion 321 drives the second connecting portion 322 and the third connecting portion 323 to activate, and the transmission is transmitted through the second connecting portion 322 and the third connecting portion 323 to achieve simultaneous movement of the first pressure roller 110 and the third pressure roller 130.

[0094] The first rolling gap is the gap between the final formed film 600, while the second rolling gap is the gap between the semi-finished film 600. If the detection mechanism 200 detects that the film 600 does not meet the design requirements, only the first rolling gap needs to be adjusted. To ensure that the second rolling gap is not affected when adjusting the first rolling gap, the first roller 110 and the third roller 130 are both connected to the adjustment mechanism 300. The adjustment mechanism 300 simultaneously drives the first roller 110 and the third roller 130 to move, so that the first roller 110 and the third roller 130 are relatively stationary, while the first roller 110 and the second roller 120 move relative to each other.

[0095] In some embodiments, the film forming mechanism 100 includes a first pressing roller 110 and a second pressing roller 120, which cooperate to roll-press the active material 500 into a film sheet 600. The adjustment mechanism 300 is connected to the first pressing roller 110 and / or the second pressing roller 120, and is used to increase or decrease the pressure applied to the first pressing roller 110 and / or the second pressing roller 120 based on the detection results of the detection mechanism 200.

[0096] The adjustment mechanism 300 is connected to at least one of the first pressing roller 110 and the second pressing roller 120 and is capable of changing the pressure applied to at least one of the first pressing roller 110 and the second pressing roller 120. For example, the adjustment mechanism 300 may be a hydraulic pressure mechanism, a pneumatic pressure mechanism, an electric pressure mechanism, or the like.

[0097] If the detection mechanism 200 detects that the thickness or weight per unit area of ​​the film 600 is small, the adjustment mechanism 300 reduces the pressure applied to the first pressing roller 110 and / or the second pressing roller 120, thereby reducing the roller pressure of the first pressing roller 110 and / or the second pressing roller 120 in contact with the active material 500, thereby increasing the thickness or weight per unit area of ​​the film 600. If the detection mechanism 200 detects that the thickness or weight per unit area of ​​the film 600 is large, the adjustment mechanism 300 increases the pressure applied to the first pressing roller 110 and / or the second pressing roller 120, thereby increasing the roller pressure of the first pressing roller 110 and / or the second pressing roller 120 in contact with the active material 500, thereby reducing the thickness or weight per unit area of ​​the film 600.

[0098] According to some embodiments of this application, please refer to Figures 2 to 6 .

[0099] The embodiment of the present application provides a pole piece manufacturing device 10, which includes a film forming mechanism 100, a compounding mechanism 400, a detection mechanism 200 and an adjustment mechanism 300. The film forming mechanism 100 is used to form an active material 500 into a membrane 600. The compounding mechanism 400 is arranged downstream of the film forming mechanism 100, and the compounding mechanism 400 is used to compound the membrane 600 with a substrate 700 into a pole piece 800. The detection mechanism 200 is arranged upstream of the compounding mechanism 400, and the detection mechanism 200 is used to detect the thickness or unit area weight of the membrane 600. The adjustment mechanism 300 is connected to the film forming mechanism 100, and the adjustment mechanism 300 is communicatively connected to the detection mechanism 200. The adjustment mechanism 300 is used to adjust the film forming mechanism 100 according to the detection result of the detection mechanism 200, so as to control the thickness or unit area weight of the membrane 600 within a preset range.

[0100] The film forming mechanism 100 includes a first pressing roller 110 and a second pressing roller 120, which cooperate to roll-press the active material 500 into a film sheet 600. An adjustment mechanism 300 is connected to the first pressing roller 110 and / or the second pressing roller 120 and is used to adjust the gap between the first pressing roller 110 and the second pressing roller 120 based on the detection results of the detection mechanism 200. The laminating mechanism 400 includes a laminating roller 410, which cooperates with the second pressing roller 120 to roll-press the film sheet 600 and the substrate 700 to form the electrode sheet 800. Along the circumference of the second pressing roller 120, the first pressing roller 110 is closer to the detection mechanism 200 than the laminating roller 410.

[0101] The membrane forming mechanism 100 can form the active material 500 into a membrane 600, and then the substrate 700 and the membrane 600 are combined through the composite mechanism 400 to obtain the electrode 800. The electrode manufacturing device 10 uses a detection mechanism 200 provided upstream of the composite mechanism 400 to detect the membrane 600 formed by the membrane forming mechanism 100 and determine whether the membrane 600 formed by the membrane forming mechanism 100 meets the design requirements. If it does not meet the design requirements, the membrane forming mechanism 100 is promptly adjusted through the adjustment mechanism 300 to ensure that the membrane 600 formed by the membrane forming mechanism 100 meets the design requirements. This improves the yield rate of the membrane 600, and ensures that the electrode 800 produced using the membrane 600 has a high yield rate.

[0102] The first and second rollers 110, 120 can cooperate to roll-press the active material 500 to form the active material 500 into a film 600. The gap between the first and second rollers 110, 120 affects the thickness or weight per unit area of ​​the film 600. For example, when the gap between the first and second rollers 110, 120 is larger, the thickness or weight per unit area of ​​the film 600 is also larger. When the gap between the first and second rollers 110, 120 is smaller, the thickness or weight per unit area of ​​the film 600 is also smaller. The adjustment mechanism 300 can be connected to at least one of the first and second rollers 110, 120 to drive at least one of the first and second rollers 110, 120 toward or away from the other, thereby reducing or increasing the gap between the first and second rollers 110, 120. When the detection mechanism 200 detects that the thickness or weight per unit area of ​​the film 600 is larger, the adjustment mechanism 300 can reduce the gap between the first and second rollers 110, 120. When the detection mechanism 200 detects that the thickness or unit area weight of the diaphragm 600 is small, the adjustment mechanism 300 can increase the gap between the first pressure roller 110 and the second pressure roller 120 to control the thickness or unit area weight of the diaphragm 600 within a preset range, so that the thickness or unit area weight of the diaphragm 600 meets the design requirements.

[0103] The composite roller 410 cooperates with the second pressing roller 120 to roll the membrane 600 and the substrate 700 to combine the membrane 600 and the substrate 700 into the electrode 800. The second pressing roller 120 serves as both a component for rolling the active material 500 and a component for combining the membrane 600 and the substrate 700. One component achieves two functions, which simplifies the structure of the electrode manufacturing device 10 and reduces the cost of the electrode manufacturing device 10. After the active material 500 is rolled by the first pressing roller 110 and the second pressing roller 120, it is formed into a membrane 600, and the membrane 600 is transported between the second pressing roller 120 and the composite roller 410 to be combined with the substrate 700. If the detection mechanism 200 detects that the membrane 600 does not meet the design requirements, then along the circumference of the second pressing roller 120, the section of the membrane 600 between the first pressing roller 110 and the detection mechanism 200 does not meet the design requirements. The detection mechanism 200 is positioned closer to the first pressure roller 110 . When the detection mechanism 200 detects that the diaphragm 600 does not meet the design requirements, the adjustment mechanism 300 can adjust the film forming mechanism 100 in time to shorten the length of the diaphragm 600 that does not meet the design requirements.

[0104] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A pole piece manufacturing device, characterized in that: include: A film forming mechanism includes a first pressing roller and a second pressing roller, wherein the first pressing roller and the second pressing roller cooperate to press the active material into a film; a composite mechanism, disposed downstream of the film forming mechanism, comprising a composite roller, wherein the composite roller cooperates with the second pressing roller to press the film and the substrate to composite the film and the substrate into an electrode; a detection mechanism, disposed upstream of the composite mechanism, for detecting the thickness or weight per unit area of ​​the diaphragm; An adjusting mechanism connects the second pressing roller and the composite roller, the adjusting mechanism is in communication with the detection mechanism, and the adjusting mechanism is used to synchronously adjust the positions of the second pressing roller and the composite roller according to the detection results of the detection mechanism to adjust the gap between the first pressing roller and the second pressing roller to control the thickness or unit area weight of the diaphragm within a preset range.

2. The pole piece manufacturing device according to claim 1, characterized in that: The adjusting mechanism is connected to the first pressing roller, and is used to adjust the position of the first pressing roller to adjust the gap between the first pressing roller and the second pressing roller.

3. The pole piece manufacturing device according to claim 1, characterized in that: The diaphragm has a winding area wound around the second pressing roller, and the detection mechanism has a detection end facing the winding area.

4. The pole piece manufacturing device according to claim 1, characterized in that: Along the circumference of the second pressing roller, the first pressing roller is closer to the detection mechanism than the composite roller.

5. The pole piece manufacturing device according to any one of claims 1 to 4, characterized in that: The first pressing roller, the second pressing roller and the composite roller are arranged along a first direction; Along the first direction, the second pressing roller is located between the first pressing roller and the composite roller, and the first direction is perpendicular to the axial direction of the second pressing roller.

6. The pole piece manufacturing device according to any one of claims 1 to 4, characterized in that: The detection mechanism is a laser thickness gauge, a beta ray weight gauge or an x-ray weight gauge.

7. The pole piece manufacturing device according to claim 1, characterized in that: The film forming mechanism includes a third pressing roller, and the first pressing roller and the third pressing roller cooperate to press the active material.

8. The pole piece manufacturing device according to claim 7, characterized in that: A first rolling gap is formed between the first pressing roller and the second pressing roller, and a second rolling gap is formed between the first pressing roller and the third pressing roller. The active material passes through the second rolling gap and the first rolling gap in sequence, and the width of the first rolling gap is smaller than the width of the second rolling gap.

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