A dry mixing device

Abstract

The application discloses a dry mixing device, which comprises a mixing barrel device, a first heat exchange cavity and a second heat exchange cavity arranged outside a barrel body and not communicated with each other, a mixing cavity formed in the barrel body, the first heat exchange cavity comprising a first liquid inlet and a first liquid outlet, the second heat exchange cavity comprising a second liquid inlet and a second liquid outlet, a first heat exchange circulating system for driving a first heat exchange medium to flow in the first heat exchange cavity, and a second heat exchange circulating system for driving a second heat exchange medium to flow in the second heat exchange cavity. Since two heat exchange cavities are arranged outside the barrel body, the heat exchange medium in the two heat exchange cavities can be independently controlled according to requirements, and since the first heat exchange medium with high temperature is not needed for cooling, the time for lowering the temperature of the first heat exchange medium is saved, and the second heat exchange medium which does not participate in the temperature rising process and has a lower temperature can be directly used for heat exchange with the barrel body, so that the temperature control efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing equipment technology, and more specifically, to a dry mixing apparatus. Background Technology

[0002] Dry electrode technology differs from traditional wet electrode fabrication processes. Traditional wet electrode fabrication requires large amounts of solvent to dissolve binders and active materials, forming a uniform slurry which is then coated onto the current collector. A lengthy drying process is then necessary to remove the solvent. Dry electrode technology, however, eliminates the need for large amounts of solvent, directly processing the electrode components into an electrode in a dry state, thus simplifying the manufacturing process.

[0003] The dry electrode preparation process is as follows: First, the active materials, binders and other dry electrode raw materials are fully mixed. Then, under certain pressure and temperature conditions, these raw materials are tightly bonded together and formed into a film with a certain strength and structure through a roller pressing device. This film is then directly composited onto the current collector to form an electrode.

[0004] The equipment used for mixing dry electrode raw materials is a dry mixing device. Due to process requirements, the temperature inside the mixing chamber of the dry mixing device needs to be adjusted according to the process requirements. Currently, the dry mixing device uses a mold temperature controller to control the heating and cooling. During the temperature control process, the time required to heat the mold from a low temperature to a high temperature is relatively short, but the time required to cool down from a high temperature to a low temperature is relatively long, far exceeding the requirements of mass production cycle time.

[0005] Therefore, how to improve the temperature control efficiency of dry mixing devices is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this application is to provide a dry mixing device to improve the temperature control efficiency of the dry mixing device.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] This application provides a dry mixing device, including a mixing cylinder assembly and a stirring assembly, wherein the mixing cylinder assembly includes:

[0009] A mixing cylinder device includes a cylinder body and a first heat exchange chamber and a second heat exchange chamber disposed on the outside of the cylinder body and not connected to each other. The cylinder body forms a mixing chamber. The first heat exchange chamber includes a first liquid inlet and a first liquid outlet. The second heat exchange chamber includes a second liquid inlet and a second liquid outlet.

[0010] The first heat exchange circulation system includes a first circulation port connected to the first liquid inlet and a second circulation port connected to the first liquid outlet, so as to drive the first heat exchange medium to flow in the first heat exchange cavity.

[0011] The second heat exchange circulation system includes a third circulation port connected to the second liquid inlet and a fourth circulation port connected to the second liquid outlet, so as to drive the second heat exchange medium to flow in the second heat exchange cavity.

[0012] The dry mixing apparatus provided in this application has a first heat exchange chamber and a second heat exchange chamber on the outer side of the cylinder. These two heat exchange chambers are not interconnected, allowing for independent control of the internal heat exchange medium. A first heat exchange circulation system drives the first heat exchange medium to flow within the first heat exchange chamber, and a second heat exchange circulation system drives the second heat exchange medium to flow within the second heat exchange chamber. Because two heat exchange chambers are located on the outer side of the cylinder, the heat exchange medium within each chamber can be independently controlled as needed; for example, the first heat exchange chamber can be used as a heating chamber, and the second heat exchange chamber as a cooling chamber. When heating is required, the first heat exchange circulation system drives the first heat exchange medium to circulate within the first heat exchange chamber to gradually increase the temperature within the mixing chamber. When cooling is required, the second heat exchange circulation system drives the second heat exchange medium to flow in the second heat exchange cavity. Since the first heat exchange medium, which is at a high temperature, does not need to be cooled down, the time to lower the temperature of the first heat exchange medium is saved. The second heat exchange medium, which has a lower temperature and has not participated in the heating process, can directly exchange heat with the cylinder, thus improving the temperature control efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the dry mixing apparatus disclosed in the embodiments of this application;

[0015] Figure 2 This is a schematic diagram of the dry mixing apparatus disclosed in this application with the outer sleeve removed at one angle.

[0016] Figure 3 This is a schematic diagram of the dry mixing apparatus disclosed in this application with the outer sleeve removed, viewed from another angle.

[0017] Figure 4 This is a top view of the dry mixing apparatus disclosed in the embodiments of this application;

[0018] Figure 5 for Figure 4 Sectional view along AA;

[0019] Figure 6 This is a schematic diagram of the structure of the labyrinth flow channel plate and the supporting baffle disclosed in the embodiments of this application;

[0020] Figure 7 This is a schematic diagram of the internal structure of the mixing cylinder device disclosed in the embodiments of this application;

[0021] Figure 8 This is a top view of the stirring paddle device disclosed in the embodiments of this application;

[0022] Figure 9 for Figure 8 A cross-sectional view along BB.

[0023] The meanings of the various reference numerals in the figure are as follows:

[0024] 100-Base;

[0025] 200 - Mixing cylinder device; 210 - Cylinder body; 220 - Spiral flow channel plate; 230 - First heat exchange chamber; 240 - Support rod; 250 - Labyrinth flow channel plate; 260 - Support baffle; 270 - Outer sleeve; 280 - Second heat exchange chamber; 281 - Inner ring flow channel; 282 - Outer ring flow channel;

[0026] 300 - Stirring drive device; 310 - Drive motor; 320 - Drive pulley; 330 - Driven pulley;

[0027] 400 - First circulation line; 410 - First inlet line; 420 - First return line;

[0028] 500 - Second circulation line; 510 - Second inlet line; 520 - Second return line;

[0029] 600 - Agitator assembly; 610 - Agitator blade; 620 - Agitator shaft; 621 - Threaded hole; 630 - Support bushing; 640 - Pressure cap; 641 - Fastening hole;

[0030] 700 - Spoiler. Detailed Implementation

[0031] This application discloses a dry mixing device to improve the temperature control efficiency of the dry mixing device.

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] like Figures 1-5 As shown in the illustration, this application discloses a dry mixing apparatus, which includes a mixing cylinder assembly and a stirring assembly. The mixing cylinder assembly is used to contain dry electrode raw materials and control the temperature of the dry electrode raw materials to ensure thorough mixing at the corresponding process temperature. The stirring assembly is used to stir the dry electrode raw materials inside the mixing cylinder assembly to improve mixing efficiency.

[0034] In this embodiment, the mixing cylinder assembly includes a mixing cylinder device 200, a first heat exchange circulation system (not shown in the figure), and a second heat exchange circulation system (not shown in the figure). The mixing cylinder device 200 may be mounted on the base 100.

[0035] The mixing cylinder device 200 includes a cylinder 210 and a first heat exchange chamber 230 and a second heat exchange chamber 280 disposed on the outside of the cylinder 210. The first heat exchange chamber 230 and the second heat exchange chamber 280 are used to introduce corresponding heat exchange media to exchange heat with the cylinder 210, thereby regulating the temperature of the cylinder 210 and the dry electrode raw material inside the cylinder 210.

[0036] The cylinder 210 has a mixing chamber for containing the dry electrode raw material to be mixed. The inner wall of the mixing chamber of the cylinder 210 is provided with a baffle 700 to work together with the stirring assembly to improve the mixing efficiency of the dry electrode raw material.

[0037] The first heat exchange chamber 230 includes a first liquid inlet and a first liquid outlet. The first heat exchange circulation system includes a first circulation port communicating with the first liquid inlet and a second circulation port communicating with the first liquid outlet, so as to drive the first heat exchange medium to flow within the first heat exchange chamber 230.

[0038] Driven by the first heat exchange circulation system, the first heat exchange medium enters the first heat exchange chamber 230 through the first inlet and exits through the first outlet, thus circulating within the first heat exchange chamber 230. The first heat exchange medium can exchange heat with other equipment outside the first heat exchange chamber 230, achieving continuous temperature control. In addition to the pump that drives the flow of the first heat exchange medium, the first heat exchange circulation system may also include a temperature control device. This device can adjust the temperature of the first heat exchange medium, such as raising or lowering its temperature.

[0039] When the first heat exchange medium is a heating medium, the high-temperature first heat exchange medium exchanges heat with the dry electrode material in the mixing chamber through the first heat exchange channel 230, thereby raising the temperature of the dry electrode material. The first heat exchange medium discharged from the first heat exchange channel 230 through the first outlet has a lower temperature and is then heated by an external temperature control device (such as an electric heating device or a mold temperature controller) before re-entering the first heat exchange channel 230 to continue exchanging heat with the dry electrode material in the mixing chamber until the temperature of the dry electrode material reaches the corresponding process temperature. Of course, the first heat exchange medium can also be a cooling medium, with the same working principle, which will not be elaborated further.

[0040] The second heat exchange chamber 280 includes a second liquid inlet and a second liquid outlet. The second heat exchange circulation system includes a third circulation port communicating with the second liquid inlet and a fourth circulation port communicating with the second liquid outlet, so as to drive the second heat exchange medium to flow within the second heat exchange chamber 280.

[0041] Driven by the second heat exchange circulation system, the second heat exchange medium enters the second heat exchange chamber 280 through the second inlet and exits through the second outlet, thus circulating within the second heat exchange chamber 280. Outside the second heat exchange chamber 280, the second heat exchange medium can exchange heat with other equipment, achieving continuous temperature control. In addition to the pump that drives the flow of the second heat exchange medium, the second heat exchange circulation system may also include a temperature control device. This device can adjust the temperature of the second heat exchange medium, such as raising or lowering its temperature.

[0042] When the second heat exchange medium is a cooling medium, the low-temperature second heat exchange medium exchanges heat with the dry electrode material in the mixing chamber through the second heat exchange channel 280, thereby cooling the dry electrode material. The second heat exchange medium discharged from the second heat exchange channel 280 at an increased temperature is then cooled by an external temperature control device (which can be an air-cooled heat exchanger or other liquid-cooled heat exchanger) before re-entering the second heat exchange channel 280 to continue exchanging heat with the dry electrode material in the mixing chamber until the temperature of the dry electrode material drops to the corresponding process temperature. Of course, the second heat exchange medium can also be a heating medium; the working principle is the same and will not be elaborated further.

[0043] It should be noted that during cooling, in addition to the second heat exchange medium participating in cooling, the first heat exchange medium can also participate in cooling to improve cooling efficiency.

[0044] The dry mixing apparatus disclosed in this application has a first heat exchange chamber 230 and a second heat exchange chamber 280 on the outer side of the cylinder 210. The first heat exchange chamber 230 and the second heat exchange chamber 280 are not connected to each other, so the operation of the internal heat exchange medium can be controlled independently. A first heat exchange circulation system is used to drive the first heat exchange medium to flow in the first heat exchange chamber 230, and a second heat exchange circulation system is used to drive the second heat exchange medium to flow in the second heat exchange chamber 280.

[0045] Because two heat exchange chambers are provided on the outside of the cylinder 210, the heat exchange medium in the two heat exchange chambers (the first heat exchange chamber 230 and the second heat exchange chamber 280) can be independently controlled as needed. For example, the first heat exchange chamber 230 can be used as a heating chamber, and the second heat exchange chamber 280 as a cooling chamber. When heating is required, the first heat exchange circulation system drives the first heat exchange medium to circulate within the first heat exchange chamber 230 to gradually increase the temperature of the dry electrode raw material in the mixing chamber. During heating, the second heat exchange circulation system does not operate.

[0046] When cooling is required, the second heat exchange circulation system drives the second heat exchange medium to flow within the second heat exchange cavity 280, and the first heat exchange circulation system can be deactivated. Since cooling does not require the high-temperature first heat exchange medium to be cooled, the time for first lowering the temperature of the first heat exchange medium is eliminated. Heat can be directly exchanged between the second heat exchange medium, which has not participated in the heating process and has a lower temperature, and the cylinder 210, thus improving temperature control efficiency.

[0047] In this embodiment, the first heat exchange medium and the second heat exchange medium are made of different materials. For example, the first heat exchange medium can be heat transfer oil, and the second heat exchange medium can be water. The heat transfer oil can be used as the heating medium, and the water as the cooling medium. Heat transfer oil has good thermal stability and a high specific heat capacity, enabling it to maintain stable performance over a wide temperature range. The heat transfer oil can slowly and evenly absorb heat and transfer it to the cylinder 210, achieving precise temperature control. This ensures the consistency and stability of product quality for processes with high temperature accuracy requirements.

[0048] Water has a large specific heat capacity and latent heat of vaporization, making it highly effective at absorbing heat. When rapid cooling of the cylinder 210 is required, water can quickly remove a large amount of heat, achieving rapid cooling. Compared with some other cooling media, water has higher cooling efficiency, effectively shortening the cooling time and meeting the process requirements for rapid cooling.

[0049] It should be noted that the first heat exchange medium and the second heat exchange medium can also be the same, as long as they operate independently.

[0050] In one specific embodiment of this application, the first heat exchange chamber 230 is located above the second heat exchange chamber 280 along the height direction. The first heat exchange chamber 230, as a heating chamber, is located above the second heat exchange chamber 280, which is a cooling chamber. This layout reduces thermal interference between the two heat exchange media, which is conducive to independently realizing the heating and cooling functions, and ensures the stability and reliability of the temperature control system.

[0051] The second heat exchange chamber 280 is set in the lower part of the cylinder 210 as a cooling chamber. It can also be set in the bottom of the cylinder 210, or in both the lower and bottom parts of the cylinder 210, so as to increase the heat exchange area between the second heat exchange medium and the cylinder 210 within a limited space.

[0052] Furthermore, the volume of the first heat exchange chamber 230 is the first volume, and the volume of the second heat exchange chamber 280 is the second volume, with the ratio of the second volume to the first volume ranging from 20% to 30%. For example, the ratio of the second volume to the first volume can be 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, etc. This embodiment does not limit the specific value of the above ratio; those skilled in the art can select a value within the range of 20% to 30% based on their needs.

[0053] In this embodiment, since the dry mixing device has greater heating and heat preservation requirements during the mixing process, the first heat exchange channel 230 is configured with a larger volume as a heating channel, so that the first heat exchange channel 230 and the cylinder 210 have a larger heat exchange area, which can ensure that the dry electrode raw material can obtain better heating and heat preservation conditions through the first heat exchange medium.

[0054] Since a larger heat exchange area cannot be configured for the second heat exchange chamber 280, it is positioned below the first heat exchange chamber 230. The dry electrode material, influenced by gravity, is located at the bottom of the cylinder 210, ensuring sufficient cooling efficiency from the second heat exchange medium. During the cooling of the dry electrode material, the stirring assembly can simultaneously stir the material to further improve cooling efficiency.

[0055] like Figure 5 As shown, an outer sleeve 270 is fitted around the outer side of the cylinder 210, and the first heat exchange channel 230 and the second heat exchange channel 280 are both formed between the outer sleeve 270 and the cylinder 210. A heat insulation layer may be provided on the outer side of the outer sleeve 270 to reduce heat exchange with the external environment and ensure the heat exchange efficiency between the first heat exchange medium, the second heat exchange medium and the dry electrode material.

[0056] A spiral flow channel plate 220 is provided inside the first heat exchange cavity 230 to divide the first heat exchange cavity 230 into spiral flow channels that swirl along the height direction. The spiral flow channels increase the flow path length of the first heat exchange medium within the first heat exchange cavity 230, significantly extending the contact time between the first heat exchange medium and the cylinder 210. This arrangement allows the first heat exchange medium to transfer more heat to the cylinder 210, thereby improving the heating efficiency and ensuring that the dry electrode material inside the cylinder 210 reaches the required temperature more quickly.

[0057] The spiral flow channel allows the first heat exchange medium to flow around the circumference of the cylinder 210, which can avoid local overheating or undercooling. During the spiral flow process, the first heat exchange medium continuously washes over various parts of the cylinder 210, reducing the temperature difference in the circumferential direction of the cylinder 210 and achieving a uniform circumferential temperature distribution.

[0058] The spiral flow channel plate 220 can be coiled around the outer wall of the cylinder 210 or welded to the cylinder 210. To further improve the stability of the spiral flow channel plate 220, multiple support rods 240 can be provided along the outer circumference of the cylinder 210. The support rods can support and fix the spiral flow channel plate 220, ensuring the stability of the flow channel width separated by the spiral flow channel plate 220.

[0059] Furthermore, the first liquid inlet is connected to the bottom of the spiral flow channel, and the first liquid outlet is connected to the top of the spiral flow channel. That is, in this embodiment, the first heat exchange medium enters the spiral flow channel from the bottom and flows spirally upwards, which helps to form a relatively gentle temperature gradient in the axial direction of the cylinder 210. As the first heat exchange medium rises, heat is gradually released, avoiding excessive heat concentration at a certain height, making the temperature distribution along the axial direction of the cylinder 210 more uniform, which is beneficial to improving product quality and the stability of the production process. Moreover, since the dry electrode material is mainly located on the lower side of the cylinder 210, the upward flow of the first heat exchange medium ensures that the higher-temperature first heat exchange medium exchanges heat with the dry electrode material first. As the first heat exchange medium flows upwards, its temperature gradually increases. This arrangement avoids heat waste, allowing more heat from the first heat exchange medium to be transferred to the dry electrode material rather than the surrounding environment.

[0060] like Figure 5 and Figure 6As shown, in this embodiment, a labyrinth flow channel plate 250 is provided inside the second heat exchange cavity 280 to divide the second heat exchange cavity 280 into a labyrinth flow channel that coils radially along the cylinder 210. The labyrinth flow channel design in this embodiment significantly increases the flow path of the second heat exchange medium within the second heat exchange cavity 280. The second heat exchange medium flows radially around the cylinder 210, significantly extending its contact time with the cylinder 210. This allows the second heat exchange medium to more fully absorb the heat dissipated by the cylinder 210, improving heat exchange efficiency and more effectively reducing the temperature of the dry electrode material inside the cylinder 210. The labyrinth flow channel achieves a longer water flow path within the limited second heat exchange cavity 280, effectively utilizing radial space. Cooling efficiency is improved without significantly increasing the equipment volume.

[0061] In this embodiment, the labyrinth flow channel includes at least an inner flow channel 281 located between the labyrinth flow channel plate 250 and the cylinder 210, and an outer flow channel 282 located between the labyrinth flow channel plate 250 and the outer sleeve 270. The inner flow channel 281 and the outer flow channel 282 flow from end to end. It should be noted that several intermediate flow channels may also be included between the inner flow channel 281 and the outer flow channel 282.

[0062] Furthermore, the second liquid inlet is connected to the inner ring flow channel 281, and the second liquid outlet is located in the outer ring flow channel 282. That is, in this embodiment, the second heat exchange medium gradually flows from the inner ring flow channel 281 of the labyrinth flow channel to the outer ring flow channel 282, so that the second heat exchange medium with a lower temperature first contacts and exchanges heat with the cylinder 210 in the inner ring flow channel 281, and as the temperature rises, it gradually flows to the outer ring until it is discharged from the second heat exchange cavity 280.

[0063] like Figure 6 As shown, the labyrinth flow channel plate 250 has staggered areas in the radial direction of the cylinder 210 (e.g. Figure 6 (The portion within the dashed box). This arrangement allows the labyrinth flow channel plate 250 to divide the second heat exchange cavity 280 into interconnected channels that gradually expand from the inside out. One end of the labyrinth flow channel plate 250 is fixed to the outer wall of the cylinder 210, and the other end is fixed to the inner wall of the outer sleeve 270. The fixing method can be welding, bonding, fastener fixing, etc., and this embodiment does not limit the fixing method.

[0064] If the labyrinth flow channel plate 250 is fixed only at its two ends within the second heat exchange cavity 280, the portion of the labyrinth flow channel plate 250 furthest from the ends is prone to floating, resulting in poor stability. Under the influence of the flow of the second heat exchange medium, the labyrinth flow channel plate 250 is prone to swaying within the second heat exchange cavity 280, generating noise, and is also prone to breakage at the connection between the labyrinth flow channel plate 250 and the cylinder 210 and the outer sleeve 270.

[0065] Based on this, in a specific embodiment of this application, at least one support baffle 260 is further provided in the second heat exchange cavity 280. The support baffle 260 is fixedly connected to the cylinder 210 and the outer sleeve 270, respectively, and the labyrinth flow channel plate 250 is fixedly connected to the support baffle 260. The support baffle 260 has a supporting and fixing function for the labyrinth flow channel plate 250. Multiple support baffles 260 can be provided and are evenly arranged along the circumferential direction of the cylinder 210. The support baffle 260 can improve the rigidity of the labyrinth flow channel plate 250, making the labyrinth flow channel plate 250 less prone to deformation and vibration, ensuring that the flow channel width of the labyrinth flow channel formed by the labyrinth flow channel plate 250 is stable and does not change with the change of medium pressure.

[0066] The support baffle 260 has a medium passage hole that extends through the entire wall thickness, ensuring that the support baffle 260 does not obstruct the flow of the second heat exchange medium. Although the support baffle 260 has a medium passage hole, allowing the second heat exchange medium to pass through it without affecting its flow within the labyrinth channel, the support baffle 260 also slows down the flow rate of the second heat exchange medium, increasing its residence time and improving heat exchange efficiency.

[0067] The first heat exchange circulation system can be connected to the first heat exchange chamber 230 via a first circulation pipeline 400. Specifically, the first circulation pipeline 400 may include a first liquid inlet pipeline 410 and a first liquid return pipeline 420. The first circulation port is connected to the first liquid inlet via the first liquid inlet pipeline 410, and the second circulation port is connected to the first liquid outlet via the first liquid return pipeline 420. Control valves are provided on both the first liquid inlet pipeline 410 and the first liquid return pipeline 420. In this embodiment, by providing control valves on the first liquid inlet pipeline 410 and the first liquid return pipeline 420, these control valves can be closed as needed to cut off the circulation of the first heat exchange medium within the first heat exchange chamber 230.

[0068] The second heat exchange circulation system can be connected to the second heat exchange chamber 280 via a second circulation pipeline 500. Specifically, the second circulation pipeline 500 may include a second inlet pipeline 510 and a second return pipeline 520. A third circulation port is connected to the second inlet port via the second inlet pipeline 510, and a fourth circulation port is connected to the second outlet port via the second return pipeline 520. Control valves are installed on both the second inlet pipeline 510 and the second return pipeline 520. In this embodiment, by installing control valves on the second inlet pipeline 510 and the second return pipeline 520, these control valves can be closed as needed to cut off the circulation of the second heat exchange medium within the second heat exchange chamber 280.

[0069] In summary, control valves are installed on the first circulation pipe 400 and the second circulation pipe 500, which can quickly cut off the circulation of the heat exchange medium. Compared with control through the first and second heat exchange circulation systems, the cutting-off speed is faster and the temperature control accuracy is higher. During the switching from heating to cooling, the control valve on the first circulation pipe 400 can be closed and the control valve on the second circulation pipe 500 can be opened; correspondingly, during the switching from cooling to heating, the control valve on the second circulation pipe 500 can be closed and the control valve on the first circulation pipe 400 can be opened, thus enabling rapid switching between heating and cooling.

[0070] like Figures 7-9 As shown in a specific embodiment of this application, the stirring assembly may include a stirring paddle device 600 and a stirring drive device 300. The stirring part of the stirring paddle device 600 is located in the mixing chamber, and the stirring drive device 300 is used to drive the stirring paddle device 600 to rotate. The stirring drive device 300 can control the rotation speed of the stirring paddle device 600 as needed. For example, during cooling, the stirring paddle device 600 can rotate at a low speed to maintain a uniform temperature drop of the dry electrode material and avoid temperature differences between dry electrode materials at different heights.

[0071] Furthermore, the stirring paddle device 600 may include a stirring shaft 620 and stirring blades 610. One end of the stirring shaft 620 is located inside the mixing chamber, and the other end is located outside the mixing chamber. The portion located outside the mixing chamber is connected to the stirring drive device 300 for transmission. A first key portion is provided on the outer wall of the stirring shaft 620.

[0072] The stirring blade 610 has a mounting hole, and the mounting hole is provided with a second key that is keyed to the first key. The stirring blade 610 is sleeved on the stirring shaft 620 through its mounting hole. Through the cooperation of the second key and the first key, the stirring blade 610 and the stirring shaft 620 can be driven to rotate.

[0073] Multiple impellers 610 can be mounted on the stirring shaft 620, and each impeller 610 is connected to the stirring shaft 620 using the same key connection. This arrangement allows each impeller 610 to be individually disassembled and replaced. When one impeller 610 is damaged, only that impeller 610 needs to be replaced, without having to replace the entire stirring device 600, thus reducing maintenance costs.

[0074] To ensure the distance between any two adjacent stirring blades 610 along the axial direction of the stirring shaft 620, the stirring device 600 also includes a support sleeve 630. The support sleeve 630 is fitted onto the stirring shaft 620 and along the axial direction of the stirring shaft 620, any two adjacent stirring blades 610 are separated by the support sleeve 630.

[0075] The support bushing 630 includes a third key portion that is keyed to the first key portion. That is, the support bushing 630 is also keyed to the stirring shaft 620, preventing the support bushing 630 from rotating with the stirring shaft 620 and thus preventing wear on the stirring blades 610 due to rotation of the support bushing 630. In this embodiment, the distance between the stirring blades 610 can be adjusted by the axial length of the support bushing 630.

[0076] The first key section can be a spline, which extends along the axial direction of the stirring shaft 620, so that each stirring blade 610 and each support sleeve 630 can be sequentially fitted into the end of the stirring shaft 620 and positioned by the step provided at the other end of the stirring shaft 620.

[0077] A pressure cap 640 is fitted onto one end of the stirring shaft 620 located within the mixing chamber. The pressure cap 640 is fixed to the stirring shaft 620 by fasteners to press the stirring blades 610. The pressure cap 640 limits the other ends of each stirring blade 610 and each support shaft sleeve 630, so that one end of each stirring blade 610 and each support shaft sleeve 630 is limited by the step of the stirring shaft 620, and the other end is limited by the pressure cap 640.

[0078] The stirring shaft 620 is provided with a threaded hole 621 extending axially, and the pressure cap 640 is provided with a fastening hole 641 arranged coaxially with the threaded hole 621. During installation, after each stirring blade 610 and each support shaft sleeve 630 are sequentially fitted onto the stirring shaft 620, the pressure cap 640 is fitted onto the end of the stirring shaft 620, and then fasteners are passed through the fastening hole 641 and threaded into the threaded hole 621.

[0079] like Figure 3 As shown, the stirring drive device 300 includes a drive motor 310 and a pulley mechanism. The driving pulley 320 of the pulley mechanism is connected to the output shaft of the drive motor 310, and the driven pulley 330 of the pulley mechanism is connected to the stirring paddle device 600. The pulley mechanism is a flexible transmission method. When the damping of the stirring paddle device 600 increases, the transmission belt connecting the driving pulley 320 and the driven pulley 330 will slip to prevent the drive motor 310 from burning out.

[0080] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0081] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0082] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0083] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A dry mixing device, characterized in that, The assembly includes a mixing cylinder assembly and a stirring assembly, wherein the mixing cylinder assembly includes: A mixing cylinder device (200) includes a cylinder (210) and a first heat exchange chamber (230) and a second heat exchange chamber (280) disposed outside the cylinder (210) and not connected to each other. The cylinder (210) forms a mixing chamber. The first heat exchange chamber (230) includes a first liquid inlet and a first liquid outlet. The second heat exchange chamber (280) includes a second liquid inlet and a second liquid outlet. The first heat exchange circulation system includes a first circulation port connected to the first liquid inlet and a second circulation port connected to the first liquid outlet, so as to drive the first heat exchange medium to flow in the first heat exchange cavity (230); The second heat exchange circulation system includes a third circulation port connected to the second liquid inlet and a fourth circulation port connected to the second liquid outlet, so as to drive the second heat exchange medium to flow in the second heat exchange cavity (280).

2. The dry mixing apparatus as described in claim 1, characterized in that, The first heat exchange medium and the second heat exchange medium are made of different materials.

3. The dry mixing apparatus as described in claim 2, characterized in that, The first heat exchange medium is heat transfer oil, and the second heat exchange medium is water.

4. The dry mixing apparatus as described in claim 1, characterized in that, Along the height direction, the first heat exchange cavity (230) is located above the second heat exchange cavity (280).

5. The dry mixing apparatus as described in claim 4, characterized in that, The volume of the first heat exchange chamber (230) is the first volume, and the volume of the second heat exchange chamber (280) is the second volume. The ratio of the second volume to the first volume is in the range of 20% to 30%.

6. The dry mixing apparatus as described in claim 1, characterized in that, The outer sleeve (270) is provided on the outer side of the cylinder (210), and the first heat exchange channel (230) and the second heat exchange channel (280) are both formed between the outer sleeve (270) and the cylinder (210).

7. The dry mixing apparatus as described in claim 6, characterized in that, A spiral flow channel plate (220) is provided inside the first heat exchange cavity (230) to divide the first heat exchange cavity (230) into spiral flow channels that spiral along the height direction.

8. The dry mixing apparatus as described in claim 7, characterized in that, The first liquid inlet is connected to the bottom of the spiral flow channel, and the first liquid outlet is connected to the top of the spiral flow channel.

9. The dry mixing apparatus as described in claim 6, characterized in that, The second heat exchange cavity (280) is provided with a labyrinth flow channel plate (250) to divide the second heat exchange cavity (280) into labyrinth flow channels that coil radially along the cylinder (210).

10. The dry mixing apparatus as described in claim 9, characterized in that, The maze flow channel includes at least an inner flow channel (281) located between the maze flow channel plate (250) and the cylinder (210), and an outer flow channel (282) located between the maze flow channel plate (250) and the outer sleeve (270), with the inner flow channel (281) and the outer flow channel (282) flowing from end to end.

11. The dry mixing apparatus as described in claim 10, characterized in that, The second liquid inlet is connected to the inner ring flow channel (281), and the second liquid outlet is located in the outer ring flow channel (282).

12. The dry mixing apparatus as described in claim 9, characterized in that, The labyrinth flow channel plate (250) has an interlaced region in the radial direction of the cylinder (210).

13. The dry mixing apparatus as described in claim 12, characterized in that, One end of the labyrinth flow channel plate (250) is fixed to the outer wall of the cylinder (210), and the other end of the labyrinth flow channel plate (250) is fixed to the inner wall of the outer sleeve (270).

14. The dry mixing apparatus as described in claim 9, characterized in that, The second heat exchange cavity (280) is also provided with at least one support baffle (260), the support baffle (260) is fixedly connected to the cylinder (210) and the outer sleeve (270) respectively, the labyrinth flow channel plate (250) is fixedly connected to the support baffle (260), and the support baffle (260) is provided with a medium through hole that penetrates the wall thickness.

15. The dry mixing apparatus as described in claim 14, characterized in that, There are multiple support baffles (260), which are evenly arranged along the circumference of the cylinder (210).

16. The dry mixing apparatus according to any one of claims 1-15, characterized in that, The first circulation port is connected to the first inlet through the first inlet pipe (410), and the second circulation port is connected to the first outlet through the first return pipe (420). Both the first inlet pipe (410) and the first return pipe (420) are equipped with control valves.

17. The dry mixing apparatus according to any one of claims 1-15, characterized in that, The third circulation port is connected to the second inlet port through the second inlet pipe (510), and the fourth circulation port is connected to the second outlet port through the second return pipe (520). Control valves are provided on both the second inlet pipe (510) and the second return pipe (520).

18. The dry mixing apparatus according to any one of claims 1-15, characterized in that, The stirring assembly includes: A stirring paddle device (600), wherein the stirring part of the stirring paddle device (600) is located inside the mixing chamber; A stirring drive device (300) is used to drive the stirring paddle device (600) to rotate.

19. The dry mixing apparatus as described in claim 18, characterized in that, The stirring paddle device (600) includes: A stirring shaft (620) has one end located inside the mixing chamber and the other end located outside the mixing chamber. The part located outside the mixing chamber is connected to the stirring drive device (300) for transmission. A first key portion is provided on the outer wall of the stirring shaft (620). The stirring blade (610) has a mounting hole, and the mounting hole is provided with a second key that is keyed to the first key.

20. The dry mixing apparatus as described in claim 19, characterized in that, The stirring paddle device (600) further includes a support sleeve (630), which is sleeved on the stirring shaft (620) and is located along the axial direction of the stirring shaft (620). Any two adjacent stirring blades (610) are separated by the support sleeve (630). The support bushing (630) includes a third key portion that is key-connected to the first key portion.

21. The dry mixing apparatus as described in claim 19, characterized in that, A pressure cap (640) is fitted onto one end of the stirring shaft (620) located in the mixing chamber. The pressure cap (640) is fixed to the stirring shaft (620) by fasteners to press the stirring blades (610).

22. The dry mixing apparatus as described in claim 19, characterized in that, The first key section is a spline.

23. The dry mixing apparatus as described in claim 18, characterized in that, The stirring drive device (300) includes a drive motor (310) and a pulley mechanism. The driving pulley (320) of the pulley mechanism is connected to the output shaft of the drive motor (310), and the driven pulley (330) of the pulley mechanism is connected to the stirring paddle device (600).

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