Battery raw material metal impurity screening equipment and screen frame assembly thereof

Abstract

The invention discloses battery raw material metal impurity screening equipment and a screening frame assembly thereof. The battery raw material metal impurity screening equipment comprises a main machine frame; the cleaning tank is arranged in the main machine frame, an opening is formed in the top of the cleaning tank, and a bearing part is arranged on the inner wall surface of the cleaning tank; the cleaning tank is made of a non-metal material; the screen frame assembly is placed in the cleaning tank and connected with the bearing part; the sealing cover is arranged on the top surface of the host frame; a spraying head is arranged on the face, facing the cleaning tank, of the sealing cover. The water inlet pipe is connected to the main machine frame, and the water outlet end of the water inlet pipe is communicated with the spraying head; the water inlet end of the water outlet pipe is communicated with the bottom of the cleaning tank; at least part of the ultrasonic assembly is arranged in the cleaning tank, and the ultrasonic assembly is arranged close to the bottom of the cleaning tank. According to the battery raw material metal impurity screening equipment and the screen frame assembly thereof, the structure is simple, the separation efficiency is high, and the integrity and cleanliness of screened objects can be guaranteed.

Description

Technical Field

[0001] This specification relates to the field of precision screening equipment technology, and in particular to a screening device for metal impurities in battery raw materials and its screen frame assembly. Background Technology

[0002] Metallic impurities (such as iron, copper, and zinc) can cause micro-short circuits inside the battery, exacerbate self-discharge, and even thermal runaway. Therefore, the purity of raw materials (such as cathode materials and electrolytes) directly affects battery quality. Current raw material foreign matter screening equipment on the market has a complex structure, high maintenance costs, low separation efficiency for micron-sized impurities, and the extraction methods used are difficult to reliably obtain the desired metallic impurities. Summary of the Invention

[0003] The inventors discovered that most raw material foreign matter screening equipment currently on the market uses an integrated screen frame, with the screen and frame molded as one piece. Due to limitations in the screen frame manufacturing process, the collection of ultrafine particles (such as those with a diameter of 15μm) is prone to problems such as material jamming at the screen frame edges and difficulty in thoroughly cleaning and collecting impurities. Furthermore, the screening instrument and screen frame are mostly made of metal, which easily introduces other foreign matter that interferes with the screening results. The market generally only collects the undersize material, merely for removing impurities; there is no equipment available for precisely studying the oversize material (the substance remaining on the screen), and no specialized equipment specifically developed for this type of research has been found.

[0004] Furthermore, most current precision screening equipment for raw materials uses a combined vibrating screen and vibration source design. This type of dry screening instrument, through prolonged and repeated vibration of the sieved material, causes changes in particle size, limiting its application in screening fine and fragile particles. Meanwhile, in wet screening instruments of this type, because the screen frame and screen are integrally molded and designed according to the equipment's vibration source, the screening process typically involves preparing a suspension of sample powder and pouring it into the screen frame. The final sieved material is obtained by adding rinsing agent from the top and vibrating the screen frame. This method, limited by the equipment structure, cannot thoroughly clean the sieved material, and the screening process easily introduces other foreign objects, interfering with the screening results.

[0005] In view of the shortcomings of the prior art, one object of this specification is to provide a screening device for metal impurities in battery raw materials and its screen frame assembly, which has a simple structure and high separation efficiency, and can ensure the integrity and cleanliness of the screened material.

[0006] To achieve the above objectives, this specification provides a screen frame assembly, comprising: A first screen frame, wherein the outer wall surface of the first screen frame is provided with a first connector; the first screen frame is provided with a first through hole, and the periphery of the first through hole forms the inner wall surface of the first screen frame; A second screen frame located below the first screen frame has a second connector on its outer wall surface, which is detachably and fixedly connected to the first connector. The second screen frame has a second through hole, and the periphery of the second through hole forms the inner wall surface of the second screen frame. The first through hole and the second through hole have the same shape and size. When the first connecting member and the second connecting member are fixedly connected, the screen mesh is pressed and fixed between the first screen frame and the second screen frame. A spray head is used to connect to a water inlet pipe and spray liquid in a rotating manner into the first screen frame.

[0007] In a preferred embodiment, the spray head rotates in a horizontal plane.

[0008] In a preferred embodiment, the spray head has a main channel and multiple branch channels that are connected to each other. The end of the main channel away from the branch channels is connected to the water inlet pipe. The extension direction of the main channel is parallel to the axial direction of the first through hole. The branch channels are arc-shaped or straight. When the branch channel is straight, the length of the branch channel is greater than the shortest distance from the main channel to the branch channel outlet.

[0009] In a preferred embodiment, the outlet of the branch channel is lower than the top of the first screen frame; the outlets of the plurality of branch channels are flush with or lower than the inlet of the branch channel; in a reference plane flush with the inlet, the plurality of branch channels of the same shape are evenly distributed in the circumferential direction; the reference plane is perpendicular to the axial direction.

[0010] In a preferred embodiment, the spray head is disposed in the middle of the first screen frame, and at least a portion of the spray head is below the upper edge of the first screen frame.

[0011] In a preferred embodiment, the spray head is made of a non-metallic material.

[0012] This specification also provides a battery raw material metal impurity screening device, including: Host framework; The cleaning tank is installed within the main frame, with an opening at the top and a support portion on its inner wall; the cleaning tank is made of non-metallic material. A screen frame assembly as described in any of the above embodiments, placed inside the cleaning tank and connected to the supporting part; A sealing cover is provided on the top surface of the main frame to seal the opening; the spray head is provided on the side of the sealing cover facing the cleaning tank; A water inlet pipe is connected to the main frame, and the water outlet end of the water inlet pipe is connected to the spray head; A water outlet pipe is connected to the main frame, and the water inlet end of the water outlet pipe is connected to the bottom of the cleaning tank. An ultrasonic component is at least partially disposed within the cleaning tank, the ultrasonic component being disposed near the bottom of the cleaning tank, enabling the cleaning tank to operate in an ultrasonic environment.

[0013] In a preferred embodiment, the sealing cover is rotatably disposed on the top surface of the main frame, and the rotation axis of the sealing cover is parallel to the top surface of the main frame.

[0014] In a preferred embodiment, the spray head is disposed at the center of the sealing cover; when the sealing cover seals the opening, the line connecting the center of the sealing cover and the center of the opening is perpendicular to the top surface of the main frame.

[0015] In a preferred embodiment, the sealing cover includes a transparent viewing window, which is located near the center of the sealing cover.

[0016] In a preferred embodiment, the water inlet end of the water inlet pipe is located on the side of the main frame, and part of the water inlet pipe is located above the top surface of the main frame.

[0017] In a preferred embodiment, the outlet end of the water outlet pipe is located on the side of the main frame, and the outlet end of the water outlet pipe and the inlet end of the water inlet pipe are located on the same side or different sides, and the outlet end of the water outlet pipe is located below the inlet end of the water inlet pipe.

[0018] In a preferred embodiment, the support unit includes a plurality of hanging plates that are evenly spaced in the circumferential direction and fixed to the inner wall of the washing tank. The hanging plates are provided with grooves for supporting the hanging handles of the screen frame assembly.

[0019] In a preferred embodiment, the ultrasonic component employs a variable frequency ultrasonic system; the battery raw material metal impurity screening equipment further includes a touch screen disposed on the side of the main frame, the touch screen being electrically connected to the ultrasonic component. Beneficial effects

[0020] The sieve frame assembly provided in this embodiment includes a first sieve frame, a second sieve frame, a screen, and a spray head. It features a simple structure and high separation efficiency. Through an innovative split-type sieve frame design, the first and second sieve frames are detachably connected via a first connector and a second connector. The first and second sieve frames, along with the screen, form a stacked sandwich design, facilitating screen replacement. This structure is compatible with screens of different materials and mesh sizes, effectively reducing the cost of using the sieve frames. After sieving, the entire screen can be removed to collect impurity particles, effectively avoiding incomplete collection of impurity particles due to gaps in the sieve frame, which could affect the accuracy of test results. Simultaneously, the automatically rotating spray head washes away fine particles adhering to the walls of the first sieve frame, ensuring that all fine particles are flushed onto the screen. The combined effect of the spray head and screen further guarantees the integrity and cleanliness of the sieved material.

[0021] The screen is located between the first and second screen frames, with no dead corners, and there will be no leakage between the first and second screen frames. The impurities on the screen are exactly what you see, which can accurately analyze the impurity particles in a certain amount of powder material.

[0022] The battery raw material metal impurity screening equipment provided in this embodiment has a support part on the inner wall of the cleaning tank, which can be used to support the screen frame assembly, thereby ensuring the relative independence of the screen frame assembly and creating favorable conditions for the use of non-metallic screens and screen frame assemblies with the main unit of this equipment. At the same time, the cleaning tank of this equipment is made of non-metallic material, which can avoid the introduction of other foreign objects during the screening process to avoid interfering with the screening results. By setting the spray head at the corresponding position of the sealed flip cover, the spray head is used to perform a secondary rinsing of the fine particles hanging on the inner wall of the screen frame assembly. After the sample to be screened is completely immersed, the ultrasonic component automatically starts ultrasonic screening and washing, which can ensure the integrity and cleanliness of the screened material and achieve efficient and fine screening of battery materials.

[0023] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope as a result.

[0024] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0025] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, whole, step, or component, but does not exclude the presence or addition of one or more other features, wholes, steps, or components. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a cross-sectional structural diagram of a screen frame assembly provided in this embodiment; Figure 2 This is a cross-sectional structural diagram of a spray head provided in this embodiment; Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure after the spray heads have been removed. Figure 4 for Figure 3 Top view; Figure 5 for Figure 3 The front view; Figure 6 for Figure 3 A schematic diagram of the exploded structure; Figure 7 for Figure 4 Cross-sectional view of surface AA; Figure 8 for Figure 7 Enlarged structural diagram at point B; Figure 9 This is a three-dimensional structural diagram of a battery raw material metal impurity screening device provided in this embodiment. Figure 10 for Figure 9 The front view; Figure 11 for Figure 10 A partial cross-sectional schematic diagram of the metal impurity screening equipment for battery raw materials during operation; Figure 12 for Figure 9 Top view; Figure 13 This is a cross-sectional structural diagram of another spray head provided in this embodiment.

[0028] Explanation of reference numerals in the attached figures: 10. Screen frame assembly; 1. First screen frame; 11. First connecting piece; 111. Hook and fold part; 101. Fixing base; 102. Operating handle; 103. Connecting rod; 104. First rotating shaft; 105. Second rotating shaft; 12. Hanging handle; 13. First through hole; 2. Second screen frame; 21. Second connecting piece; 211. Hook and fold part; 22. Second through hole; 3. Screen mesh; 4. Non-metallic gasket; 5. Spray head; 51. Main channel; 52. Branch channel; 521. Outlet; 6. Main frame; 61. Top surface; 62. Side; 7. Cleaning tank; 71. Opening; 72. Bearing part; 721. Hanging plate; 7211. Groove; 8. Sealing cover; 81. Transparent observation window; 91. Inlet pipe; 92. Outlet pipe; 93. Ultrasonic assembly; 94. Touch screen; 95. Ultrasonic immersion liquid surface; X, Axial axis. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0030] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or may be interposed with another element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or may be interposed with another element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

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

[0032] Please see Figures 1 to 8 and Figure 13 This application provides a screen frame assembly 10, including: a first screen frame 1, a second screen frame 2, a screen 3, and a spray head 5.

[0033] Among them, such as Figure 3 As shown, the outer wall of the first screen frame 1 is provided with a first connecting member 11. For example... Figure 7As shown, the first screen frame 1 has a first through hole 13, and the periphery of the first through hole 13 forms the inner wall surface of the first screen frame 1. The second screen frame 2 is located below the first screen frame 1. The outer wall surface of the second screen frame 2 has a second connecting member 21, which is detachably and fixedly connected to the first connecting member 11, thereby allowing the first screen frame 1 and the second screen frame 2 to be detachably and fixedly connected, and generating a mutual pressing force and tightly fitting the first screen frame 1 and the second screen frame 2. The second screen frame 2 has a second through hole 22, and the periphery of the second through hole 22 forms the inner wall surface of the second screen frame 2. The first through hole 13 and the second through hole 22 have the same shape and size. The screen 3 is disposed between the first screen frame 1 and the second screen frame 2. When the first connecting member 11 and the second connecting member 21 are fixedly connected, the screen 3 is pressed and fixed between the first screen frame 1 and the second screen frame 2. The first through hole 13 and the second through hole 22 are aligned during installation, which can reduce the installation difficulty of the screening mechanism and improve the installation efficiency. The spray head 5 is used to connect to the water inlet pipe 91 and spray liquid in a rotating manner into the first screen frame 1.

[0034] The screen frame assembly 10 provided in this embodiment includes a first screen frame 1, a second screen frame 2, a screen 3, and a spray head 5. It has a simple structure and high separation efficiency. Through the innovative design of a split screen frame, the first screen frame 1 and the second screen frame 2 are detachably connected by a first connector 11 and a second connector 21. The first screen frame 1, the second screen frame 2, and the screen 3 are arranged in a stacked sandwich design, which facilitates the replacement of the screen 3. This structure is compatible with screens 3 of different materials and mesh sizes, and can effectively reduce the use cost of the screen frame.

[0035] After sieving, the screen frame assembly 10 allows the entire screen 3 to be removed to collect impurity particles, effectively preventing incomplete collection of impurity particles due to gaps in the screen frame, which could affect the accuracy of test results. Simultaneously, liquid enters the spray head 5 through the water inlet pipe 91, and the spray head 5 automatically rotates to spray liquid. The water inlet pipe 91 powers the spray head 5, enabling it to rotate and spray water. The automatically rotating spray head 5 washes away fine particles adhering to the walls of the first screen frame 1, ensuring that all fine particles are flushed onto the screen 3. Even finer substances leak directly into the washing tank 7 below. The combined effect of the spray head 5 and the screen 3 further guarantees the integrity and cleanliness of the screened material.

[0036] The screen 3 is located between the first screen frame 1 and the second screen frame 2, with no dead corners. There will be no leakage between the first screen frame 1 and the second screen frame 2. The impurities on the screen 3 are visible and can be accurately analyzed in a certain amount of powder material.

[0037] In this embodiment, such as Figure 1As shown, the spray head 5 has a main channel 51 and multiple branch channels 52 connected to each other. The end of the main channel 51 away from the branch channels 52 is connected to the water inlet pipe 91. The extension direction of the main channel 51 is parallel to the axial direction X of the first through hole 13, and is used to guide the water in the water inlet pipe 91 to the branch channels 52.

[0038] like Figure 2 and Figure 13 As shown, the branch channel 52 is either arc-shaped or straight. When the branch channel 52 is straight, its length is greater than the shortest distance from the main channel 51 to the branch channel outlet 521. This is to ensure that the liquid sprayed from the outlet 521 interacts with the inner wall of the first screen frame 1, which in turn pushes the spray head 5 to rotate, thus achieving automatic rotation of the spray head 5. The spray head 5 rotates in a horizontal plane, that is, it rotates around a rotation axis extending along the axial direction X.

[0039] In addition, to ensure the efficiency of the spray head 5, the outlet 521 of the branch channel 52 is set lower than the top of the first screen frame 1, so that the liquid sprayed from the outlet 521 will not spray outside the first screen frame 1. Furthermore, the outlets 521 of the multiple branch channels 52 are flush with or lower than the inlets of the branch channels 52. That is, in the direction from the center of the spray head 5 to the outer periphery of the spray head 5, the branch channels 52 are set horizontally or inclined downwards, so as not to waste the power of the liquid moving upward in the branch channels 52, and to thoroughly flush the inner wall surface of the first screen frame 1.

[0040] Furthermore, such as Figure 2 and Figure 13 As shown, in a reference plane (the reference plane is perpendicular to the axial direction X) that is flush with the inlet of the branch channel 52, multiple branch channels 52 of the same shape are evenly distributed in the circumferential direction. This allows the liquid sprayed from each outlet 521 to exert a force on the inner wall of the first screen frame 1 in the circumferential direction, thereby pushing the spray head 5 to rotate in the opposite direction and realizing the automatic rotation of the spray head 5.

[0041] like Figure 1 As shown, the spray head 5 is disposed within the first through hole 13. Preferably, the spray head 5 is positioned in the middle of the first screen frame 1, thereby allowing for uniform spraying of liquid onto the inner wall surface of the first screen frame 1. At least a portion of the spray head 5 is below the upper edge of the first screen frame 1, providing space for the outlet 521.

[0042] In this embodiment, the spray head 5 is preferably made of a non-metallic material, which can avoid introducing other foreign objects into the screening process and interfering with the screening results.

[0043] In this embodiment, both the first screen frame 1 and the second screen frame 2 have an integrally formed polymer layer at the points where they are pressed together (that is, the first screen frame 1 has an integrally formed polymer layer at the points where it is pressed together with the second screen frame 2, and the second screen frame 2 has an integrally formed polymer layer at the points where it is pressed together with the first screen frame 1), thus avoiding the introduction of foreign matter that could interfere with the screening results during the screening process. Preferably, the polymer layer is made of Teflon.

[0044] The polymer layer has a certain degree of flexibility, which allows the first screen frame 1 and the second screen frame 2 to bond more tightly when subjected to compressive force.

[0045] The more specific reason for setting up the polymer layer can be understood as follows: if the first sieve frame 1 and the second sieve frame 2 are at the contact position, for example... Figure 8 The use of purely rigid metal contacts on the inter-frame ring in the middle makes it impossible for the first screen frame 1 and the second screen frame 2 to seal them. This allows material particles, especially small particles, to easily flow out from the gap between the first screen frame 1 and the second screen frame 2, or get stuck in the gap between the first screen frame 1 and the second screen frame 2.

[0046] Furthermore, when using purely rigid metal contacts, and further pressing the screen 3 together, the screen 3 cannot be completely pressed together, resulting in leakage in some areas. Even in areas where it is pressed together, leakage of the liquid to be screened can still occur due to the thickness of the screen 3 itself.

[0047] Therefore, a polymer layer is correspondingly provided on the ring where the first screen frame 1 and the second screen frame 2 are pressed together, which can achieve two functions: 1. The first screen frame 1 and the second screen frame 2 can achieve effective sealing, and the sealing degree is greatly improved; 2. When the screen 3 is further inserted between the two interfaces and pressed together, the polymer layer of the first screen frame 1 and the second screen frame 2 can effectively press the screen 3 together. Moreover, since the polymer layer has a certain degree of flexibility and compressibility, under the action of external pressing force, the polymer layer can further fill the gaps caused by the thickness of the screen 3 itself and the possible leakage.

[0048] This structure not only improves the sealing of the screening mechanism, but also makes the entire mechanism detachable.

[0049] Furthermore, depending on the different experimental scenarios, different types of sieves can be used as needed.

[0050] In one embodiment, the screen 3 of the present invention is preferably a stainless steel screen or a plastic screen.

[0051] In one embodiment, the area corresponding to the first through hole 13 and the second through hole 22 is completely covered with a screen 3. That is, the screen 3 corresponding to the area of ​​the first through hole 13 and the second through hole 22 has no dead zones for screening; that is, the screen 3 of this application has no black-edged areas for screening, and the entire area of ​​the first through hole 13 and the second through hole 22 has screening functionality. In other words, even at the outermost edge of the entire area of ​​the first through hole 13 and the second through hole 22, screening functionality is available, with no dead zones. The diameter of the screen 3 is larger than the diameter of the first through hole 13 and the second through hole 22.

[0052] In one embodiment, such as Figure 8 As shown, the screen 3 can cover the entire area where the first screen frame 1 and the second screen frame 2 are pressed together. Preferably, the screen 3 can be cut into a circular screen piece and placed between the first screen frame 1 and the second screen frame 2 for pressing. The area of ​​this screen piece exceeds the area enclosed by the polymer layer, that is, the diameter of the screen 3 is larger than the diameter of the part of the first screen frame or the second screen frame where the polymer layer is located.

[0053] like Figure 4 and Figure 6 As shown, the first connecting member 11 includes a latching folding portion 111 rotatably connected to the first screen frame 1, and the second connecting member 21 includes a latching hook portion 211 fixedly connected to the second screen frame 2. The latching folding portion 111 and the latching hook portion 211 form a latching structure. The latching folding portion 111 has a locked position and an unlocked position. When the latching folding portion 111 is connected to the latching hook portion 211 and is in the locked position, the first screen frame 1 and the second screen frame 2 are fixedly connected, and the screen 3 is fixed between the first screen frame 1 and the second screen frame 2, allowing for screening. When the latching folding portion 111 is in the unlocked position, the first screen frame 1 and the second screen frame 2 can be separated, thereby making the screen 3 detachable.

[0054] Specifically, such as Figure 5 and Figure 6 As shown, the latch folding part 111 includes a fixed base 101, an operating handle 102, and a connecting rod 103. The fixed base 101 is fixedly connected to the outer wall of the first screen frame 1. The operating handle 102 is rotatably connected to the fixed base 101 via a first rotating shaft 104. The connecting rod 103 is rotatably connected to the operating handle 102 via a second rotating shaft 105. The connecting rod 103 can engage with the latch hook part 211. Both the first rotating shaft 104 and the second rotating shaft 105 extend horizontally and do not overlap. By rotating the operating handle 102, the latch folding part 111 can be switched between a locked position and an unlocked position.

[0055] In one embodiment, the operating handle 102 is located at Figure 5When the position shown is such that the operating handle 102 is approximately in a vertical plane, the buckle folding part 111 is in the locked position. Rotate the operating handle 102 so that the operating handle 102 rotates around the first rotating shaft 104 by a certain angle. Since the second rotating shaft 105 is located on the operating handle 102, the connecting rod 103 moves downward under the action of the operating handle 102, thereby releasing the connection between the connecting rod 103 and the buckle hook part 211. At this time, the operating handle 102 is approximately in a horizontal plane, and the buckle folding part 111 is in the unlocked position.

[0056] In this embodiment, there are multiple first connectors 11, which are evenly spaced in the circumferential direction. The second connectors 21 are arranged in a one-to-one correspondence with the first connectors 11 in the vertical direction, thereby achieving a stable and reliable connection between the first screen frame 1 and the second screen frame 2.

[0057] To apply the screen frame assembly 10 to the battery raw material metal impurity screening equipment described later, a plurality of hanging handles 12 are provided on the outer wall surface of the first screen frame 1. The hanging handles 12 can place the screen frame assembly 10 at the corresponding position in the battery raw material metal impurity screening equipment. The plurality of hanging handles 12 are evenly spaced in the circumferential direction.

[0058] Preferably, the number of handles 12 is equal to the number of first connectors 11, and a first connector 11 is provided between two adjacent handles 12, that is, the handles 12 and the first connectors 11 are arranged adjacent to each other. In the vertical direction, the handles 12 are arranged near the top surface of the first screen frame 1, and the first connectors 11 are arranged near the bottom surface of the first screen 3.

[0059] In this embodiment, the height of the second screen frame 2 is less than the height of the first screen frame 1. The height of the second screen frame 2 is approximately equal to the height of the second connecting member 21, serving as the base of the entire screen frame assembly 10 and facilitating the installation and removal of the screen 3.

[0060] like Figure 6 and Figure 8 As shown, the screen frame assembly 10 also includes two non-metallic gaskets 4. One non-metallic gasket 4 is disposed on the bottom surface of the first screen frame 1 and is attached to the screen 3, and the other non-metallic gasket 4 is disposed on the top surface of the second screen frame 2 and is attached to the screen 3, which can ensure that the outer edge of the screen 3 is sealed.

[0061] Please see Figures 9 to 12 This application provides a battery raw material metal impurity screening device, including: a main frame 6, a washing tank 7, a screen frame assembly 10, a sealing cover 8, a water inlet pipe 91, a water outlet pipe 92, and an ultrasonic component 93.

[0062] Among them, such as Figure 9As shown, the cleaning tank 7 is disposed within the main frame 6. The cleaning tank 7 has an opening 71 at its top and a support portion 72 on its inner wall. The cleaning tank 7 is made of a non-metallic material. A screen frame assembly 10 is placed within the cleaning tank 7 and connected to the support portion 72. The screen frame assembly 10 is selected from the screen frame assembly 10 described in any of the above embodiments. A sealing cap 8 is disposed on the top surface 61 of the main frame 6 to seal the opening 71. A spray head 5 is disposed on the side of the sealing cap 8 facing the cleaning tank 7. Both the inlet pipe 91 and the outlet pipe 92 are connected to the main frame 6. The outlet end of the inlet pipe 91 is connected to the spray head 5. The inlet end of the outlet pipe 92 is connected to the bottom of the cleaning tank 7. At least a portion of the ultrasonic component 93 is disposed within the cleaning tank 7. The ultrasonic component 93 is positioned near the bottom of the cleaning tank 7, enabling the cleaning tank 7 to operate in an ultrasonic environment.

[0063] The battery raw material metal impurity screening equipment provided in this embodiment has a support part 72 on the inner wall of the cleaning tank 7, which can be used to support the screen frame assembly 10, thereby ensuring the relative independence of the screen frame assembly 10 and creating favorable conditions for the use of non-metallic screens and screen frame assembly 10 with the main unit of this equipment. At the same time, the cleaning tank 7 of this equipment is made of non-metallic material, which can avoid the introduction of other foreign objects during the screening process to interfere with the screening results. By setting the spray head 5 at the corresponding position of the sealed flip cover, the spray head 5 is used to perform secondary rinsing of the fine particles hanging on the inner wall of the screen frame assembly 10. After the sample to be screened is completely immersed, the ultrasonic component 93 automatically starts ultrasonic screening and washing, which can ensure the integrity and cleanliness of the screened material and achieve efficient and fine screening of battery materials.

[0064] Specifically, the sealing cover 8 is rotatably disposed on the top surface 61 of the main frame 6, and the rotation axis of the sealing cover 8 is parallel to the top surface 61 of the main frame 6. The sealing cover 8 may be provided with a handle on the side away from the rotation axis, and by grasping the handle, the sealing cover 8 can be rotated around the rotation axis to open or close the sealing cover 8.

[0065] In a preferred embodiment, the spray head 5 is disposed at the center of the sealing cover 8. When the sealing cover 8 seals the opening 71, the line connecting the center of the sealing cover 8 and the center of the opening 71 is perpendicular to the top surface 61 of the main frame 6. That is, the spray head 5 coincides with the center of the cleaning tank 7, so that the liquid sprayed from the spray head 5 is evenly washed on the inner wall of the screen frame assembly 10 in the cleaning tank 7.

[0066] In this embodiment, when the sealing cover 8 seals the opening 71, the height of the outlet 521 of the spray head 5 is lower than the height of the supporting part 72, thereby ensuring that the liquid sprayed from the spray head 5 can wash the inner wall of the screen frame assembly 10. Preferably, as Figure 11As shown, when the sealing cover 8 seals the opening 71, the outlet 521 of the spray head 5 is set roughly flush with the bearing part 72, so that the inner wall of the screen frame assembly 10 can be washed by the liquid sprayed from the spray head 5, thereby achieving a better screening effect.

[0067] In a preferred embodiment, such as Figure 12 As shown, the sealing cover 8 includes a transparent observation window 81, which is located near the center of the sealing cover 8. The working status of the screen assembly in the cleaning tank 7 can be observed through the transparent observation window 81.

[0068] To ensure a reasonable equipment layout, the inlet end of the water inlet pipe 91 is located on the side 62 of the main frame 6, while the outlet end of the water inlet pipe 91 is connected to the spray head 5 on the sealing cover 8 on the top surface 61 of the main frame 6. Therefore, a portion of the water inlet pipe 91 is located above the top surface 61 of the main frame 6. The length of the portion of the water inlet pipe 91 located above the top surface 61 of the main frame 6 is greater than the distance from its contact point with the top surface 61 of the main frame 6 to the center of the cleaning tank 7, so that the water inlet pipe 91 will not be affected when the sealing cover 8 is opened or closed.

[0069] Specifically, the water outlet end of the water outlet pipe 92 is located on the side 62 of the main unit frame 6. In a preferred embodiment, such as... Figure 10 As shown, the outlet end of the water outlet pipe 92 and the inlet end of the water inlet pipe 91 are located on the same side or different sides, and the outlet end of the water outlet pipe 92 is located below the inlet end of the water inlet pipe 91 to optimize the equipment layout.

[0070] In this embodiment, such as Figure 11 As shown, the supporting part 72 includes multiple hanging plates 721 that are evenly spaced circumferentially and fixed to the inner wall of the washing tank 7. Each hanging plate 721 has a groove 7211. This structure is simple and can support the hanging handles of the screen frame assembly 10, allowing the screen frame assembly 10 to suspend itself in the washing tank 7. The multiple hanging plates 721 are evenly spaced circumferentially, and the number of hanging plates 721 can be selected according to the number of hanging handles on the screen frame assembly 10. Preferably, the number of hanging plates 721 is four.

[0071] To enable the device to screen different materials, the ultrasonic component 93 employs a variable frequency ultrasonic system, which can activate the corresponding ultrasonic frequency based on the material properties. The battery raw material metal impurity screening device also includes a touch screen 94 located on the side 62 of the main frame 6. The touch screen 94 is electrically connected to the ultrasonic component 93, and the frequency of the ultrasonic component 93 can be selected by operating the touch screen 94. The side 62 where the touch screen 94 is located is not the same side as the side 62 where the water inlet pipe 91 is located.

[0072] In a specific application scenario, when using the battery raw material metal impurity screening equipment provided in this application, the following steps are included: 1. Lift the sealing cover 8, place the screen frame assembly 10 flat on the support part 72 in the cleaning tank 7, and evenly introduce a certain amount of suspension solution (such as battery positive electrode raw material suspension solution) into the screen frame assembly 10. 2. Cover with the sealing cap 8, and turn on the corresponding frequency of ultrasound according to the material properties. At this time, pure water is injected into the cleaning tank 7 through the spray head 5 on the sealing cap 8, while spraying and rinsing the inner wall of the screen frame assembly 10 and the screen. 3. Wait for the water level to reach Figure 11 The ultrasonic immersion liquid level reaches 95° as shown in the diagram, at which point the injection stops and the ultrasonic cleaning automatically starts. The remaining material in the battery material suspension is further dissolved and cleaned through immersion ultrasonic cleaning. 4. After the rated ultrasonic washing time, the ultrasonic treatment stops, and the liquid is automatically drained through the drain pipe; 5. After the liquid level is reached, pure water is automatically injected into the cleaning tank 7 through the spray head 5 on the sealing cover 8. The equipment repeats the screening and washing actions in steps 3 and 4 above until the screening process set for the material is completed. 6. Open the sealing cover 8, take out the sieve assembly, disconnect the connection between the second connector and the first connector, and remove the impurities obtained after sieving along with the sieve sheet as a whole. At this point, the complete impurities in the measured powder sample can be completely extracted.

[0073] It should be noted that in the description of this specification, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this specification, unless otherwise stated, "a plurality of" means two or more.

[0074] Any numerical values ​​cited herein include all values ​​ranging from a lower limit to an upper limit, increasing by one unit, with at least two units between any lower and any higher value. For example, if the quantity of a component or the value of a process variable (e.g., temperature, pressure, time, etc.) is described as being from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in this specification. For values ​​less than 1, a unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1, etc. These are merely examples intended for explicit expression, and it can be assumed that all possible combinations of values ​​listed between the minimum and maximum values ​​are explicitly described in this specification in a similar manner.

[0075] Unless otherwise stated, all ranges include the endpoints and all numbers between them. The terms "approximately" or "about" used with ranges apply to both endpoints of the range. Thus, "approximately 20 to 30" is intended to cover "approximately 20 to approximately 30," including at least the specified endpoints.

[0076] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified elements, components, parts, or steps, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute included by “may” is optional.

[0077] Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The use of "a" or "an" to describe an element, component, part, or step does not imply the exclusion of other elements, components, parts, or steps.

[0078] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this teaching should not be determined by reference to the above description, but rather by reference to the appended claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the inventors have not considered that subject matter as part of the disclosed inventive subject matter.

Claims

1. A screen frame assembly, characterized in that, include: A first screen frame, wherein the outer wall surface of the first screen frame is provided with a first connector; the first screen frame is provided with a first through hole, and the periphery of the first through hole forms the inner wall surface of the first screen frame; A second screen frame located below the first screen frame has a second connector on its outer wall surface, which is detachably and fixedly connected to the first connector. The second screen frame has a second through hole, and the periphery of the second through hole forms the inner wall surface of the second screen frame. The first through hole and the second through hole have the same shape and size. When the first connecting member and the second connecting member are fixedly connected, the screen mesh is pressed and fixed between the first screen frame and the second screen frame. A spray head is used to connect to a water inlet pipe and spray liquid in a rotating manner into the first screen frame.

2. The screen frame assembly according to claim 1, characterized in that, The spray head has a main channel and multiple branch channels that are connected to each other. The end of the main channel away from the branch channels is connected to the water inlet pipe. The extension direction of the main channel is parallel to the axial direction of the first through hole. The branch channels are arc-shaped or straight. When the branch channel is straight, the length of the branch channel is greater than the shortest distance from the main channel to the branch channel outlet.

3. The screen frame assembly according to claim 2, characterized in that, The outlet of the branch channel is lower than the top of the first screen frame; the outlets of the multiple branch channels are flush with or lower than the inlet of the branch channel; in a reference plane flush with the inlet, multiple branch channels of the same shape are evenly distributed in the circumferential direction; the reference plane is perpendicular to the axial direction.

4. The screen frame assembly according to claim 1, characterized in that, The spray head is made of non-metallic material.

5. A screening device for metallic impurities in battery raw materials, characterized in that, include: Host framework; The cleaning tank is installed within the main frame, with an opening at the top and a support portion on its inner wall; the cleaning tank is made of non-metallic material. A screen frame assembly as described in any one of claims 1-4, placed inside the cleaning tank and connected to the support portion; A sealing cover is provided on the top surface of the main frame to seal the opening; the spray head is provided on the side of the sealing cover facing the cleaning tank; A water inlet pipe is connected to the main frame, and the water outlet end of the water inlet pipe is connected to the spray head; A water outlet pipe is connected to the main frame, and the water inlet end of the water outlet pipe is connected to the bottom of the cleaning tank. An ultrasonic component is at least partially disposed within the cleaning tank, the ultrasonic component being disposed near the bottom of the cleaning tank, enabling the cleaning tank to operate in an ultrasonic environment.

6. The battery raw material metal impurity screening equipment according to claim 5, characterized in that, The sealing cover is rotatably disposed on the top surface of the main frame, and the rotation axis of the sealing cover is parallel to the top surface of the main frame; the spray head is disposed at the center of the sealing cover; when the sealing cover seals the opening, the line connecting the center of the sealing cover and the center of the opening is perpendicular to the top surface of the main frame.

7. The battery raw material metal impurity screening equipment according to claim 5, characterized in that, The sealing cover includes a transparent viewing window, which is located near the center of the sealing cover.

8. The battery raw material metal impurity screening equipment according to claim 5, characterized in that, The inlet end of the water inlet pipe is located on the side of the main frame, and part of the water inlet pipe is located above the top surface of the main frame; the outlet end of the water outlet pipe is located on the side of the main frame, and the outlet end of the water outlet pipe is located on the same side or different side from the inlet end of the water inlet pipe, and the outlet end of the water outlet pipe is located below the inlet end of the water inlet pipe.

9. The battery raw material metal impurity screening equipment according to claim 5, characterized in that, The supporting part includes a plurality of hanging plates that are evenly spaced in the circumferential direction and fixed to the inner wall of the washing tank. The hanging plates are provided with grooves for supporting the hanging handles of the screen frame assembly.

10. The battery raw material metal impurity screening equipment according to claim 5, characterized in that, The ultrasonic component adopts a variable frequency ultrasonic system; the battery raw material metal impurity screening equipment also includes a touch screen disposed on the side of the main frame, and the touch screen is electrically connected to the ultrasonic component.

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