Material kneading device and battery manufacturing equipment

Abstract

The embodiment of the utility model provides a material kneading device and battery manufacturing equipment. The material kneading device comprises a double-cone bin and a double-screw assembly, and the double-cone bin is provided with a first discharge port; the double-screw assembly is arranged in the double-cone bin, and the double-screw assembly is used for kneading materials in the double-cone bin and extruding the materials towards the direction of the first discharging opening; the double-screw assembly comprises two screws which are arranged at an interval, the screws are rotatably mounted on the double-cone bin, and the rotation directions of the two screws are opposite; a spiral blade is arranged on each screw rod and extends along the axial direction of the screw rod; wherein a heating component is arranged in the screw rod, the heating component is used for heating the screw rod, and the double-cone bin is provided with an air vent used for introducing wet air. According to the technical scheme provided by the invention, the material kneading effect can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a material kneading device and battery manufacturing equipment. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the industry's sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] During the battery manufacturing process, when the existing material kneading device kneads and extrudes the materials required for electrode production, due to the low temperature of the material, the ductility of the material is poor and the material cannot be fully kneaded, resulting in poor material kneading effect, which affects the subsequent electrode coating effect. Utility Model Content

[0004] The present application provides a material kneading device and battery manufacturing equipment, which can improve the kneading effect of materials.

[0005] This application is achieved through the following technical solutions:

[0006] In the first aspect, an embodiment of the present application provides a material kneading device, which includes a double-conical bin and a twin-screw assembly, the double-conical bin having a first discharge port; the twin-screw assembly is arranged in the double-conical bin, and the twin-screw assembly is used to knead the material in the double-conical bin and extrude it toward the first discharge port; the twin-screw assembly includes two spaced-apart screws, which are rotatably installed in the double-conical bin, and the two screws rotate in opposite directions; each screw is provided with a spiral blade, which extends along the axial direction of the screw; wherein a heating component is provided in the screw, the heating component is used to heat the screw, and the double-conical bin is provided with an air vent for introducing humid air.

[0007] In the technical solution of the embodiment of the present application, by arranging a twin-screw assembly in the double-cone bin, after the material enters the double-cone bin, the twin-screw assembly is driven to rotate, and the spiral blades on the two screws squeeze and knead the material with each other, thereby improving the uniformity of the material kneading, and continuously conveying and extruding the material in the direction of the first discharge port. By arranging a heating component in the screw, the heating component can heat the screw, and the heat of the screw is transferred to the material, so that the material is within a suitable temperature range, thereby enhancing the strength and ductility of the kneaded material. By arranging an air vent for introducing humid air on the double-cone bin, the temperature and humidity of the humid air can be adaptively adjusted. After the humid air enters the double-cone bin and mixes with the material, the humidity and temperature of the material are adjusted and maintained in balance under the coordinated heating action of the screw, thereby reducing the risk of drying caused by excessive evaporation of moisture on the surface of the material and improving the kneading effect of the material.

[0008] According to some embodiments of the present application, the heating component is an electromagnetic coil.

[0009] In the above solution, the heating component is an electromagnetic coil, and the screw is heated and heated by electromagnetic induction, thereby achieving temperature control of the material. The structure is simple and easy to implement.

[0010] According to some embodiments of the present application, a first temperature detection component for detecting the temperature of the screw is provided in the screw.

[0011] In the above solution, by arranging a first temperature detection component in the screw, the first temperature detection component can monitor the temperature of the screw, better control the temperature of the material, and reduce the risk of damage to the binder of the anode / cathode material due to excessive screw temperature.

[0012] According to some embodiments of the present application, a second temperature detection component for detecting the temperature of the material is provided on the double-cone silo.

[0013] In the above scheme, by arranging a second temperature monitoring component on the double-cone bin, the second temperature monitoring component can monitor the temperature of the material in the double-cone bin away from the screw side. With the joint cooperation of the first temperature detection component and the second temperature detection component, the temperature detection of the material is more accurate, reducing the risk of excessive difference between the temperature of the screw surface and the temperature of the material on the outside.

[0014] According to some embodiments of the present application, a humidity detection component for detecting the humidity of the material is provided on the double-cone silo.

[0015] In the above solution, by arranging a humidity detection component on the double-cone silo, the humidity detection component can detect the humidity of the material, and can adjust the amount and humidity value of the wet air introduced into the vent according to the humidity of the material.

[0016] According to some embodiments of the present application, there are multiple vents, and the multiple vents are arranged at intervals along the extrusion direction of the material.

[0017] In the above scheme, by setting the number of vents to multiple, the multiple vents can be arranged along the extrusion direction of the material, so that the multiple vents can introduce humid air of different amounts or different temperature and humidity values ​​into the double-cone bin. For example, humid air of different temperatures and humidity and / or different amounts of humid air can be introduced according to the temperature and humidity conditions of the material to meet the temperature and humidity requirements of the kneading material in different areas of the double-cone bin, which can reduce the risk of reduced material strength and elongation due to excessive volatilization of surface water / solvent during the material kneading process, and ensure that the kneaded material has higher strength and elongation.

[0018] According to some embodiments of the present application, the two screws are located in the same plane; and the extension lines of the two screws intersect in the direction of the first discharge port.

[0019] In the above scheme, the two screws are placed in the same plane, and the extension lines of the two screws intersect in the direction of the first discharge port. Along the extrusion direction of the material, the spiral blades on the two screws gradually increase the extrusion and kneading intensity of the material, and the kneading effect on the material is better.

[0020] According to some embodiments of the present application, the material kneading device also includes a roller, which is connected to the first discharge port and has a second discharge port away from the first discharge port; the inner diameter of the roller gradually decreases from the first discharge port to the second discharge port.

[0021] In the above solution, a roller with a gradually decreasing inner diameter is installed at the first discharge port of the double-cone silo. This gradually decreasing inner diameter allows the roller to further compress the kneaded material (lumps) exiting the double-cone silo, reducing gaps within the material and expelling trapped air, thereby reducing the risk of defects during subsequent spreading and coating. Furthermore, the roller acts as a buffer for the kneaded material extruded from the double-cone silo, allowing the lumps to cool to a certain extent within the roller, reducing the risk of excessive surface moisture evaporation from the discharged kneaded material due to excessive temperature.

[0022] According to some embodiments of the present application, the drum is rotatably mounted on the double-cone bin; the material kneading device further includes a first driving member, which is used to drive the drum to rotate.

[0023] In the above scheme, by rotatably installing the drum on the double-cone bin, the drum rotates under the driving action of the first driving member. The material in the drum can further squeeze the kneaded material (lump material) coming out of the double-cone bin under the action of the rotational force of the drum itself, so as to reduce the internal gap of the kneaded material and discharge the air in the kneaded material.

[0024] According to some embodiments of the present application, the inner surface of the drum is provided with ridges.

[0025] In the above scheme, by providing ridges on the inner surface of the drum, the ridges protrude from the inner surface of the drum, and the ridges can act on the material in the drum, further squeezing the material in the drum, which is more conducive to discharging the air in the kneaded material in the drum.

[0026] According to some embodiments of the present application, the convex ridges are spirally arranged on the inner surface of the drum in a direction pointing from the first discharge port to the second discharge port.

[0027] In the above solution, the ridges are of a spiral structure. The spiral ridges can not only further squeeze and exhaust the material, but also guide the material in the drum to be discharged toward the second discharge port, so that it is not easy for material to remain in the drum.

[0028] According to some embodiments of the present application, the material kneading device also includes a second driving member and a transmission member. The second driving member is arranged outside the double-cone bin, and the transmission member is connected between the second driving member and the twin-screw assembly. The second driving member drives the two screws to rotate synchronously through the transmission member.

[0029] In the above scheme, under the action of the transmission member, the second drive member can realize the synchronous driving of the two screws in the twin-screw assembly. Only one set of second drive members is needed, and there is no need for two drive motors to drive the two screws separately. The structure is simpler and the cost is lower.

[0030] In a second aspect, an embodiment of the present application further provides a battery manufacturing device, which includes the material kneading device of any of the aforementioned embodiments.

[0031] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 A top view of a material kneading device provided in some embodiments of the present application;

[0034] Figure 2 A front view of a material kneading device provided in some embodiments of the present application;

[0035] Figure 3 A cross-sectional view of a screw in a material kneading device provided in some embodiments of the present application;

[0036] Figure 4 A schematic diagram of the internal structure of a double-conical bin in a material kneading device provided in some embodiments of the present application;

[0037] Figure 5 A schematic structural diagram of a drum in a material kneading device provided in some embodiments of the present application;

[0038] Figure 6A schematic diagram of the structure of a transmission member in a material kneading device provided in some embodiments of the present application;

[0039] Figure 7 This is a schematic structural diagram of a driving gear or a driven gear in a material kneading device provided in some embodiments of the present application.

[0040] Icons: 100-material kneading device; 10-double-cone bin; 11-first discharge port; 12-feed bin; 13-vent; 14-concave cavity; 20-twin-screw assembly; 21-screw; 211-heating component; 212-first temperature detection component; 213-inner cavity; 22-spiral blade; 30-second temperature detection component; 31-humidity detection component; 40-roller; 41-second discharge port; 42-rib; 43-rack; 50-first driving member; 60-second driving member; 70-transmission member; 71-driving gear; 72-driven gear; 73-box. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application 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 drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0043] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the 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 in this application may be combined with other embodiments.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0046] The term "multiple" used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two (including two) groups, and "multiple sheets" refers to more than two (including two) sheets.

[0047] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0048] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0049] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0050] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0051] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0052] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0053] In some embodiments, the battery device may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0054] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0055] The battery cells may be, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0056] A battery cell typically includes an electrode assembly. This assembly consists of a positive electrode, a negative electrode, and a separator. During the charge and discharge process, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, located between the positive and negative electrodes, prevents short circuits while allowing the active ions to pass through.

[0057] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0058] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0059] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, the metal foil can be silver-plated stainless steel, stainless steel, copper, aluminum, carbon electrodes, carbon, nickel, or titanium. A composite current collector can include a polymer base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy) on a polymer substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0060] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for battery cells may also be used.

[0061] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0062] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, the metal foil may be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, carbon electrode, carbon, nickel, or titanium.

[0063] In some embodiments, the negative electrode current collector has two opposite surfaces in its thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0064] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells that is well known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0065] In some embodiments, the diaphragm is an isolation membrane. The present application has no particular limitation on the type of isolation membrane, and any known isolation membrane with a porous structure having good chemical stability and mechanical stability can be selected.

[0066] As an example, the primary material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component positioned between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0067] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode, and serves to transport ions and isolate the positive and negative electrodes.

[0068] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0069] In some embodiments, the electrode assembly is a laminate structure.

[0070] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0071] In some embodiments, the housing includes an end cap and a shell. The shell has an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly, electrolyte, and other substances. The shell may have one or more openings. One or more end caps may also be provided.

[0072] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to a tab of the electrode assembly. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via a current collector. The electrode terminal may be provided on an end cap or on the housing.

[0073] In some embodiments, the housing is provided with an explosion-proof valve for releasing the internal pressure of the battery cell.

[0074] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. There is no special limitation in the embodiments of the present application.

[0075] In battery production, during the kneading process of anode / cathode materials, the material's ductility is limited within the double-cone silo due to the material's low temperature, preventing it from fully kneading. Furthermore, moisture loss during the kneading process can cause the material's surface to dry out, affecting subsequent coating and increasing the risk of cracking and bubbles in the active material layer of the electrode.

[0076] In view of this, in order to solve the problem of poor kneading effect of the material, some embodiments of the present application provide a material kneading device, which includes a double-cone bin and a twin-screw assembly, the double-cone bin having a first discharge port; the twin-screw assembly is arranged in the double-cone bin, and the twin-screw assembly is used to knead the material in the double-cone bin and extrude it toward the first discharge port; the twin-screw assembly includes two spaced-apart screws, which are rotatably installed in the double-cone bin, and the two screws rotate in opposite directions; each screw is provided with a spiral blade, which extends along the axial direction of the screw; wherein a heating component is provided in the screw, the heating component is used to heat the screw, and the double-cone bin is provided with an air vent for introducing humid air.

[0077] The material kneading device provided in the embodiment of the present application has a heating component installed in the screw, which can heat the screw. The heat of the screw is transferred to the material, keeping the material within a suitable temperature range, thereby enhancing the strength and ductility of the kneaded material. Furthermore, by providing a vent for introducing moist air on the double-cone bin, the temperature and humidity of the moist air can be adaptively adjusted. After the moist air enters the double-cone bin and mixes with the material, the moisture and temperature of the material are adjusted and maintained in balance under the coordinated heating effect of the screw, reducing the risk of drying caused by excessive evaporation of moisture on the surface of the material and improving the kneading effect of the material.

[0078] This embodiment of the application provides a material kneading device, please refer to Figure 1 and Figure 2 The material kneading device 100 includes a double-conical bin 10 and a twin-screw assembly 20. The double-conical bin 10 has a first discharge port 11. The twin-screw assembly 20 is arranged in the double-conical bin 10, and the twin-screw assembly 20 is used to knead the material in the double-conical bin 10 and extrude it toward the first discharge port 11. The twin-screw assembly 20 includes two spaced-apart screws 21, and the screws 21 are rotatably mounted on the double-conical bin 10. The two screws 21 rotate in opposite directions. Each screw 21 is provided with a spiral blade 22, and the spiral blade 22 extends along the axial direction of the screw 21. A heating component 211 is provided in the screw 21, and the heating component 211 is used to heat the screw 21. The double-conical bin 10 is provided with an air vent 13 for introducing humid air.

[0079] The materials are the anode / cathode materials required for the production of the pole pieces, that is, the positive electrode active material or the negative electrode active material on the pole piece during the production process of the battery. The positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides and their respective modified compounds, but this application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for battery cells can also be used. The negative electrode active material can adopt the negative electrode active materials for battery cells that are well known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials and lithium titanate, etc.

[0080] The double-cone silo 10 is a horizontal silo structure with a feed silo 12 located on top. The feed silo 12 is in communication with the interior of the double-cone silo 10. Material enters the feed silo 12 and falls into the double-cone silo 10 under gravity. A twin-screw assembly 20 is located within the double-cone silo 10. The twin-screw assembly 20 kneads the material within the double-cone silo 10 and extrudes it toward the first discharge port 11. The first discharge port 11 is located at one horizontal end of the double-cone silo 10, giving the twin-screw assembly 20 a double-dragon structure.

[0081] The screw 21 can be rotatably mounted in the double cone bin 10 via a bearing. The two screws 21 are spaced apart and arranged side by side. The screw 21 is provided with a spiral blade 22. The spiral blade 22 is spirally arranged on the screw 21 along the axial direction of the screw 21. Figure 4 A concave cavity 14 is correspondingly provided in the double-cone bin 10 for the spiral blade 22 on the screw 21 to make way, and the concave cavity 14 will not interfere with the spiral blade 22 during rotation.

[0082] After the heating component 211 in the screw 21 heats the material, the temperature of the material may increase and accelerate the volatilization of the moisture in the material, resulting in a decrease in the humidity of the material, affecting the kneading effect of the material. Therefore, the humid air introduced through the vent 13 can adjust the humidity of the material in the double-cone bin 10, reduce the phenomenon of the material being too dry, and when the material is at a suitable temperature and humidity, it is kneaded and extruded through the twin-screw assembly 20 to improve the kneading effect of the material. Of course, the temperature control of the material can be dual-controlled by the heating component 211 of the screw 21 and the temperature of the humid air itself. Since the vent 13 is located on the inner wall of the double-cone bin 10, and the screw 21 is located in the double-cone bin 10, the humid air and the screw 21 can more fully heat the materials inside and outside the double-cone bin 10, and the heating effect of the material is more sufficient and uniform.

[0083] The heating component 211 may be a resistance heating element or an electromagnetic induction heating element. When the heating component 211 is an electromagnetic induction heating element, the heating component 211 may be an electromagnetic coil.

[0084] The vent 13 refers to a hole structure provided through the inner and outer walls of the double-cone silo 10. The vent 13 is connected to an external air supply pipeline. One end of the air supply pipeline is connected to an air source, which can be steam. Humid air is introduced into the interior of the double-cone silo 10 through the vent 13. The temperature and humidity of the humid air can be adaptively adjusted according to the real-time situation of the material so that the temperature and humidity of the material in the double-cone silo 10 are within a preset range.

[0085] In the technical solution of the embodiment of the present application, a twin-screw assembly 20 is provided within the double-cone bin 10. After the material enters the double-cone bin 10, the twin-screw assembly 20 is driven to rotate, and the spiral blades 22 on the two screws 21 mutually squeeze and knead the material, improving the uniformity of the material kneading and continuously conveying and extruding the material toward the first discharge port 11. By providing a heating component 211 within the screw 21, the heating component 211 can heat the screw 21. The heat from the screw 21 is transferred to the material, keeping the material within a suitable temperature range and enhancing the strength and ductility of the kneaded material. By providing a vent 13 for introducing moist air on the double-cone bin 10, the temperature and humidity of the moist air can be adaptively adjusted. After the moist air enters the double-cone bin 10 and mixes with the material, the heated screw 21 adjusts and maintains the moisture and temperature balance of the material, reducing the risk of drying caused by excessive evaporation of moisture on the surface of the material and improving the kneading effect of the material.

[0086] According to some embodiments of this application, please combine Figure 1 and Figure 3 , the heating component 211 is an electromagnetic coil.

[0087] The heating element 211 is an electromagnetic coil. The screw 21 has an annular inner cavity 213. The electromagnetic coil has a helical structure and surrounds the inner cavity 213, making contact with the inner cavity wall of the screw 21. When the electromagnetic coil is energized, the heat generated by the electromagnetic coil is transferred to the screw 21, heating the screw 21 and then transferring the heat to the material. The temperature range of the screw 21 can range from 20°C to 70°C.

[0088] The electromagnetic coil operates on the principle of electromagnetic induction, converting electrical energy into heat to achieve rapid heating of metal workpieces. When alternating current passes through the electromagnetic coil, it generates an alternating magnetic field. Eddy currents are induced within the screw 21 in this magnetic field, converting electrical energy into heat. The principle of the electromagnetic coil is well known in the art and will not be further elaborated upon here.

[0089] By adopting the electromagnetic coil as the heating component 211, the screw 21 is heated and heated by electromagnetic induction, thereby achieving temperature control of the material. The structure is simple and easy to implement.

[0090] According to some embodiments of this application, please refer to Figure 3 A first temperature detecting component 212 for detecting the temperature of the screw 21 is provided in the screw 21 .

[0091] The first temperature detection component 212 can be a temperature sensor, and the number of the first temperature detection components 212 can be one or more. When the number of the first temperature detection components 212 is multiple, the multiple first temperature detection components 212 can be distributed at intervals along the axial direction of the screw 21 to realize multi-point temperature monitoring of the screw 21, and the temperature monitoring of the screw 21 is more comprehensive.

[0092] By providing a first temperature detection component 212 in the screw 21, the first temperature detection component 212 can monitor the temperature of the screw 21, better control the temperature of the material, and reduce the risk of damage to the binder of the anode / cathode material due to excessive temperature of the screw 21.

[0093] According to some embodiments of this application, please refer to Figure 2 The double-cone silo 10 is provided with a second temperature detecting component 30 for detecting the temperature of the material.

[0094] The second temperature detection component 30 is arranged on the double-cone bin 10, and the detection end of the second temperature detection component 30 can be protruded and arranged on the inner wall of the double-cone bin 10, and the second temperature detection component 30 is arranged at a position covered by the material in the double-cone bin 10, that is, the detection end of the second temperature detection component 30 can be in real-time contact with the material in the double-cone bin 10, thereby realizing the detection of the temperature of the material in the double-cone bin 10.

[0095] The second temperature detection component 30 can be a temperature sensor, and the number of the second temperature detection components 30 can be one or more. When the number of the second temperature detection components 30 is multiple, the multiple second temperature detection components 30 can be distributed at intervals along the conveying direction of the material on the double-cone silo 10, so that the multi-point temperature monitoring of the material in the double-cone silo 10 can be realized, and the temperature monitoring of the material is more comprehensive.

[0096] By arranging a second temperature monitoring component on the double-cone silo 10, the second temperature monitoring component can monitor the temperature of the material on the side of the double-cone silo 10 away from the screw 21. With the joint cooperation of the first temperature detection component 212 and the second temperature detection component 30, the temperature detection of the material is more accurate, reducing the risk of a large difference between the temperature of the surface of the screw 21 and the temperature of the material on the outside.

[0097] According to some embodiments of this application, please refer to Figure 2 The double-cone silo 10 is provided with a humidity detection component 31 for detecting the humidity of the material.

[0098] The humidity detection component 31 can be a humidity sensor. The detection end of the humidity detection component 31 can be protruded from the inner wall of the double-cone bin 10, and the humidity detection component 31 is set at a position that can be covered by the material in the double-cone bin 10, that is, the humidity detection component 31 can be in real-time contact with the material to realize the detection of the humidity of the material in the double-cone bin 10.

[0099] The first temperature detection component 212, the second temperature detection component 30 and the humidity detection component 31 can be electrically connected to the main control system of the kneading device. The main control system can control the opening and closing of the heating component 211 and the air supply pipeline of the vent 13 according to the temperature information and humidity information fed back by the first temperature detection component 212, the second temperature detection component 30 and the humidity detection component 31, and adaptively adjust the power of the heating component 211 and the temperature and humidity of the incoming humid air to ensure that the temperature and humidity of the material are within a preset range.

[0100] By arranging the humidity detection component 31 on the double-cone silo 10, the humidity detection component 31 can detect the humidity of the material, and can adjust the amount and humidity value of the wet air introduced into the vent 13 according to the humidity of the material.

[0101] According to some embodiments of this application, please refer to Figure 2 There are multiple vents 13, and the multiple vents 13 are arranged at intervals along the extrusion direction of the material.

[0102] When there are multiple vents 13, the number of humidity detection components 31 can also be correspondingly multiple. Multiple humidity detection components 31 can detect the humidity information of materials at different positions in the double-cone bin 10. According to the humidity of the materials at different positions, the amount of humid air introduced into the corresponding vents 13 can be adjusted, and the temperature and humidity control of the materials can be more accurate.

[0103] In this embodiment, there are three vents 13 , which are spaced apart along the extrusion direction of the material. There are two humidity detection components 31 , which are arranged along the arrangement direction of the vents 13 .

[0104] By setting the number of vents 13 to be multiple, the multiple vents 13 can be arranged along the extrusion direction of the material, so that the multiple vents 13 can introduce humid air of different amounts or different temperature and humidity values ​​into the double-cone bin 10. For example, according to the temperature and humidity conditions of the material, humid air of different temperatures and humidity and / or different amounts of humid air can be introduced to meet the temperature and humidity requirements of the kneading materials in different areas of the double-cone bin 10, which can reduce the risk of reduced material strength and elongation due to excessive volatilization of surface water / solvent during the material kneading process, thereby ensuring that the kneaded material has higher strength and elongation.

[0105] According to some embodiments of this application, please refer to Figure 1 , the two screws 21 are located in the same plane; the extension lines of the two screws 21 intersect in the direction of the first discharge port 11.

[0106] When the double-cone silo 10 is a horizontal structure, the two screws 21 are located in the same horizontal plane. The extension lines of the two screws 21 intersect in the direction of the first discharge port 11, that is, the two screws 21 are arranged at an angle.

[0107] The two screws 21 are placed in the same plane, and the extension lines of the two screws 21 intersect in the direction of the first discharge port 11. Along the extrusion direction of the material, the spiral blades 22 on the two screws 21 gradually increase the extrusion and kneading strength of the material, thereby achieving a better kneading effect on the material.

[0108] According to some embodiments of this application, please refer to Figure 1 and Figure 2 The material kneading device 100 also includes a roller 40, which is connected to the first discharge port 11. The roller 40 has a second discharge port 41 away from the first discharge port 11; the inner diameter of the roller 40 gradually decreases from the first discharge port 11 to the second discharge port 41.

[0109] The drum 40 is connected to the first discharge port 11 , the inner diameter of the feed port of the drum 40 matches the inner diameter of the first discharge port 11 , and the second discharge port 41 is the discharge port of the material kneading device.

[0110] The inner diameter of the drum 40 gradually decreases from the first discharge port 11 to the second discharge port 41, i.e., the drum 40 has a conical structure. Under the continuous conveying and extrusion action of the twin-screw assembly 20 in the double-cone bin 10, the material extruded from the double-cone bin 10 is extruded along the drum 40 toward the second discharge port 41.

[0111] A roller 40 is provided at the first discharge port 11 in the double-cone silo 10, and the inner diameter of the roller 40 gradually decreases. On the one hand, due to the gradually decreasing inner diameter of the roller 40, the roller 40 can further squeeze the kneaded material (lump material) exiting the double-cone silo 10, thereby reducing the gaps within the kneaded material and expelling the air entrained in the kneaded material, thereby reducing the risk of defects in the kneaded material during subsequent stretching and coating. On the other hand, the roller 40 can act as a buffer for the kneaded material extruded from the double-cone silo 10, and the agglomerated material can be cooled to a certain extent within the roller 40, reducing the risk of excessive surface moisture evaporation due to excessive temperature of the kneaded material after discharge.

[0112] According to some embodiments of this application, please refer to Figure 2 The drum 40 is rotatably mounted on the double-cone silo 10 ; the material kneading device 100 further includes a first driving member 50 , which is used to drive the drum 40 to rotate.

[0113] The drum 40 can be rotatably connected to the first discharge port 11 of the double-cone bin 10 via a bearing. An annular rack 43 can be provided on the outer peripheral wall of the drum 40. The first driving member 50 is a servo motor. The output end of the first driving member 50 is engaged with the rack 43. Under the driving action of the first driving member 50, the drum 40 is driven to rotate around its axis through the rack 43.

[0114] By rotatably installing the drum 40 on the double-cone bin 10, the drum 40 rotates under the driving action of the first driving member 50. The material in the drum 40 can further squeeze the kneaded material (lump material) coming out of the double-cone bin 10 under the action of the rotational force of the drum 40 itself, so as to reduce the internal gap of the kneaded material and discharge the air in the kneaded material.

[0115] According to some embodiments of this application, please refer to Figure 5 The inner surface of the drum 40 is provided with ridges 42 .

[0116] The ridge 42 refers to a raised structure protruding from the inner surface of the drum 40 . The ridge 42 may be integrally formed with the drum 40 , or the ridge 42 and the drum 40 may be connected secondary to each other.

[0117] The ridges 42 can be arranged in various ways on the inner surface of the drum 40. The ridges 42 can be spirally arranged on the inner surface of the drum 40 along the axial direction of the drum 40. Of course, the ridges 42 can be arranged in multiple rows, with the multiple rows of ridges 42 spaced apart along the axial direction of the drum 40, each row of ridges 42 including multiple ridges 42, and the multiple ridges 42 in each row of ridges 42 spaced apart along the circumference of the drum 40. The arrangement of the ridges 42 on the inner surface of the drum 40 can be determined according to actual conditions.

[0118] By providing a ridge 42 on the inner surface of the drum 40, the ridge 42 protrudes from the inner surface of the drum 40, and the ridge 42 can act on the material in the drum 40, further squeezing the material in the drum 40, which is more conducive to discharging the air in the kneaded material in the drum 40.

[0119] According to some embodiments of this application, please continue to refer to Figure 5 , pointing from the first discharge port 11 to the second discharge port 41 , the ridge 42 is spirally arranged on the inner surface of the drum 40 .

[0120] The ridges 42 are spirally arranged on the inner surface of the drum 40 , which means that the ridges 42 have a spiral structure. Along the axial direction of the drum 40 , the ridges 42 are spirally distributed on the inner wall of the drum 40 .

[0121] In the direction from the first discharge port 11 to the second discharge port 41 , the widths of the ridges 42 may be the same, or the widths of the ridges 42 may gradually decrease.

[0122] The ridges 42 are of a spiral structure. The spiral ridges 42 can not only further squeeze and exhaust the material, but also guide the material in the drum 40 to be discharged toward the second discharge port 41 , so that it is difficult for material to remain in the drum 40 .

[0123] According to some embodiments of this application, please combine Figure 1 、 Figure 6 and Figure 7 The material kneading device 100 also includes a second driving member 60 and a transmission member 70. The second driving member 60 is arranged outside the double-cone bin 10. The transmission member 70 is connected between the second driving member 60 and the twin-screw assembly 20. The second driving member 60 drives the two screws 21 to rotate synchronously through the transmission member 70.

[0124] The second driving member 60 may be a servo motor, and the second driving member 60 may further include a reduction motor. The servo motor is connected to the reduction motor, and a driving end of the reduction motor is connected to the transmission member 70 .

[0125] The transmission member 70 can be a gearbox, which is conventional. The gearbox includes a housing 73, a driving gear 71, and a driven gear 72. The driving gear 71 and the driven gear 72 are rotatably disposed within the housing 73. The driving gear 71 is drivingly connected to the second driving member 60. The driving gear 71 and the driven gear 72 mesh with each other. One of the two screws 21 meshes with the driving gear 71, and the other meshes with the driven gear 72.

[0126] Under the action of the transmission member 70, the second drive member 60 can realize the synchronous driving of the two screws 21 in the twin-screw assembly 20. A set of second drive members 60 is sufficient, and there is no need for two drive motors to drive the two screws 21 respectively. The structure is simpler and the cost is lower.

[0127] An embodiment of the present application further provides a battery manufacturing device, which includes the material kneading device 100 of any of the aforementioned embodiments.

[0128] In some embodiments, please refer to Figures 1 to 7The material kneading device 100 includes a double-conical bin 10 and a twin-screw assembly 20. The double-conical bin 10 has a first discharge port 11. The twin-screw assembly 20 is disposed in the double-conical bin 10 and is used to knead the material in the double-conical bin 10 and extrude it toward the first discharge port 11. The twin-screw assembly 20 includes two spaced-apart screws 21, which are rotatably mounted in the double-conical bin 10 and rotate in opposite directions. Each screw 21 is provided with a spiral blade 22, which extends axially along the screw 21. A heating component 211 is disposed in the screw 21, which is an electromagnetic coil for heating the screw 21. A first temperature detection component 212 is disposed in the screw 21 for detecting the temperature of the screw 21. The double-cone bin 10 is provided with a second temperature detection component 30 for detecting the temperature of the material, and a humidity detection component 31 for detecting the humidity of the material. The double-cone bin 10 is provided with a plurality of vents 13 for admitting humid air, and the vents 13 are arranged at intervals along the extrusion direction of the material.

[0129] By providing a heating component 211 in the screw 21, the heating component 211 can heat the screw 21, and the heat of the screw 21 is transferred to the material, so that the material is in an appropriate temperature range, thereby enhancing the strength and ductility of the kneaded material. By providing an air vent 13 for introducing humid air on the double-cone bin 10, the temperature and humidity of the humid air can be adaptively adjusted. After the humid air enters the double-cone bin 10, it mixes with the material. Under the coordinated heating action of the screw 21, the humidity and temperature of the material are adjusted and maintained in balance, reducing the risk of drying caused by excessive evaporation of moisture on the surface of the material, thereby improving the kneading effect of the material. By providing a first temperature detection component 212 in the screw 21, the first temperature detection component 212 can monitor the temperature of the screw 21, better control the temperature of the material, and reduce the risk of damage to the binder of the anode / cathode material due to excessive temperature of the screw 21. By providing a second temperature monitoring component on the double-cone silo 10, the second temperature monitoring component can monitor the temperature of the material on the side of the double-cone silo 10 away from the screw 21. With the combined action of the first temperature detection component 212 and the second temperature detection component 30, the material temperature detection is more accurate, reducing the risk of a large temperature difference between the surface temperature of the screw 21 and the temperature of the material outside. By providing a humidity detection component 31 on the double-cone silo 10, the humidity detection component 31 can detect the humidity of the material and adjust the amount and humidity of the humid air entering the vent 13 according to the humidity of the material. Multiple air vents 13 can be arranged along the extrusion direction of the material, so that the multiple air vents 13 can introduce different amounts or different temperature and humidity values ​​of wet air into the double-cone bin 10. For example, wet air with different temperatures and humidity and / or different amounts of wet air can be introduced according to the temperature and humidity conditions of the material to meet the temperature and humidity requirements of the kneading materials in different areas of the double-cone bin 10, which can reduce the risk of reduced material strength and elongation due to excessive volatilization of surface water / solvent during the material kneading process, and ensure that the kneaded material has higher strength and elongation.

[0130] In some embodiments, the two screws 21 are located in the same plane; the extension lines of the two screws 21 intersect in the direction of the first discharge port 11. The material kneading device also includes a roller 40, which is connected to the first discharge port 11 and has a second discharge port 41 distal from the first discharge port 11. The inner diameter of the roller 40 gradually decreases from the first discharge port 11 toward the second discharge port 41. The roller 40 is rotatably mounted on the double-conical bin 10. The material kneading device also includes a first drive member 50 for driving the roller 40 to rotate. The inner surface of the roller 40 is provided with ridges 42.

[0131] The extension lines of the two screws 21 intersect in the direction of the first discharge port 11. Along the extrusion direction of the material, the extrusion and kneading strength of the spiral blades 22 on the two screws 21 gradually increases, and the kneading effect on the material is better. Since the inner diameter of the roller 40 gradually decreases, the roller 40 can further squeeze the kneaded material (lump material) coming out of the double-cone bin 10 to reduce the gap in the kneaded material and discharge the air entrained in the kneaded material, thereby reducing the risk of defects in the kneaded material during subsequent extension and coating. On the other hand, the roller 40 can act as a buffer for the kneaded material extruded from the double-cone bin 10, and the lump material can be cooled to a certain extent in the roller 40, reducing the risk of excessive surface moisture volatilization of the kneaded material after discharge due to excessive temperature. Driven by the first drive member 50, the drum 40 rotates. The rotational force of the drum 40 further compresses the kneaded material (agglomerated material) exiting the double-cone bin 10, thereby reducing internal gaps within the kneaded material and discharging air from the material. Ribs 42 protrude from the inner surface of the drum 40 and act on the material within the drum 40, further compressing it and facilitating the removal of air from the kneaded material.

[0132] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A material kneading device, characterized in that: include: Double cone silo with a first discharge port; a twin-screw assembly disposed in the double-cone bin, configured to knead the material in the double-cone bin and extrude it toward the first discharge port; the twin-screw assembly comprises two spaced-apart screws, rotatably mounted in the double-cone bin, the two screws rotating in opposite directions; each screw is provided with a spiral blade, the spiral blade extending along the axial direction of the screw; Wherein, a heating component is provided in the screw, and the heating component is used to heat the screw, and the double-cone bin is provided with a vent for introducing moist air.

2. The material kneading device according to claim 1, characterized in that: The heating component is an electromagnetic coil.

3. The material kneading device according to claim 1, characterized in that: A first temperature detecting component for detecting the temperature of the screw is provided in the screw.

4. The material kneading device according to claim 1, characterized in that: The double-cone silo is provided with a second temperature detection component for detecting the temperature of the material.

5. The material kneading device according to claim 1, characterized in that: The double-cone silo is provided with a humidity detection component for detecting the humidity of the material.

6. The material kneading device according to claim 1, characterized in that: There are multiple vents, and the multiple vents are arranged at intervals along the extrusion direction of the material.

7. The material kneading device according to claim 1, characterized in that: The two screws are located in the same plane; The extension lines of the two screws intersect in the direction of the first discharge port.

8. The material kneading device according to claim 1, characterized in that: The material kneading device also includes: a roller connected to the first discharge port, the roller having a second discharge port away from the first discharge port; In a direction from the first discharge port to the second discharge port, the inner diameter of the drum gradually decreases.

9. The material kneading device according to claim 8, characterized in that: The drum is rotatably mounted on the double-cone bin; The material kneading device also includes: The first driving member is used to drive the drum to rotate.

10. The material kneading device according to claim 8, characterized in that: The inner surface of the drum is provided with ridges.

11. The material kneading device according to claim 10, characterized in that: The convex ridges are spirally arranged on the inner surface of the drum in a direction pointing from the first discharge port to the second discharge port.

12. The material kneading device according to claim 1, characterized in that: The material kneading device also includes: A second driving member is arranged outside the double-cone bin; The transmission member is connected between the second driving member and the twin-screw assembly, and the second driving member drives the two screws to rotate synchronously through the transmission member.

13. A battery manufacturing device, characterized in that: The invention comprises a material kneading device according to any one of claims 1 to 12.

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