Separation equipment and separation method for battery slurry

Abstract

The invention discloses separation equipment and a separation method for battery slurry. The separation equipment comprises a rack; the centrifugal device is connected with the rack, and the centrifugal device is used for adding and centrifugally separating the battery slurry; the cleaning device is movably connected with the rack, and the cleaning device is used for adding diluent into the centrifugal device, or the cleaning device is used for discharging waste liquid in the centrifugal device; the controller is electrically connected with the centrifugal device and the cleaning device, and the controller is used for controlling the starting and stopping states of the centrifugal device and the cleaning device. According to the separation equipment and the separation method for the battery slurry, the structure is simple, the operation is convenient and fast, the omission ratio is extremely low, and all impurities in the battery slurry can be separated out.

Description

Technical Field

[0001] The present invention relates to the technical field of power battery slurry detection, and in particular to a separation device and a separation method for battery slurry. Background Art

[0002] Battery slurry is the main production material of power batteries, and its pass rate directly affects the safety performance of the battery.

[0003] In the related art, if the metal impurity content in the battery slurry exceeds the standard, the metal impurities will gather to form needle-like shapes during the use of the battery, and there is a risk of puncturing the diaphragm, causing the battery to short-circuit and spontaneously combust. Therefore, it is necessary to regularly inspect the battery slurry to prevent the metal impurities inside it from exceeding the standard.

[0004] However, in the prior art, the dilution detection of battery slurry is performed by detecting metal particles through magnetic plate adsorption, which results in time-consuming and labor-intensive detection, a high rate of missed detection, and inability to detect non-magnetic metal impurities. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a separation device for battery slurry, which has a simple structure, convenient operation, extremely low missed detection rate, and can separate all impurities in the battery slurry.

[0006] Another object of the present invention is to provide a separation method for battery slurry.

[0007] The separation device for battery slurry proposed in the present invention comprises: frame; A centrifugal device, the centrifugal device is connected to the frame, and the centrifugal device is used to load and centrifugally separate the battery slurry; A cleaning device, the cleaning device is movably connected to the frame, the cleaning device is used to add diluent into the centrifugal device, or the cleaning device is used to discharge waste liquid from the centrifugal device; A controller is electrically connected to the centrifugal device and the cleaning device respectively, and is used to control the start and stop states of the centrifugal device and the cleaning device.

[0008] According to the separation device provided by the present invention, by setting a frame, the main parts of the separation device can be fixedly supported, so as to effectively simplify the composition structure of the separation device and reduce the space occupied by the separation device. By setting a centrifugal device, the battery slurry is centrifugally separated, so that the precipitation separation speed of impurities in the battery slurry can be accelerated, and the detection efficiency of the battery slurry can be improved. By setting a cleaning device, the battery slurry can be diluted to increase the separation rate of impurities and the battery slurry. In addition, the centrifugal device can be cleaned in time to avoid impurities attached to the centrifugal device after centrifugal separation from mixing into the battery slurry, so as to effectively avoid impurity leakage. By setting a controller, the working state of the centrifugal device and the cleaning device can be controlled so that the two can work in coordination, so as to improve the separation speed of the battery slurry, significantly improve the detection efficiency and detection accuracy of the battery slurry, and effectively prevent the occurrence of missed detection.

[0009] In some examples of the invention, the centrifugal device comprises: a first driving member connected to the frame; A centrifuge, wherein the centrifuge is coaxially sleeved and drivingly connected with the driving shaft of the first driving member; A centrifugal bucket is connected to the rotating arm of the centrifuge, the battery slurry is added to the centrifugal bucket, and the first driving member drives the centrifugal bucket to rotate through the centrifuge to centrifugally separate the battery slurry.

[0010] In some examples of the present invention, the centrifugal device further comprises: A detection member is connected to the frame, and the detection member is opposite to and spaced from the centrifuge, and the detection member is used to detect an initial position of the centrifuge.

[0011] In some examples of the present invention, the cleaning device includes: a second driving member connected to the frame; A cleaning assembly is connected to the driving shaft of the second driving member, and the second driving member is used to drive the cleaning assembly to move so that at least a portion of the cleaning assembly extends into the centrifugal barrel.

[0012] In some examples of the present invention, the cleaning component includes: A flushing needle is connected to the second driving member, one end of the flushing needle has a liquid inlet, the liquid inlet is used to add the diluent, the other end of the flushing needle has a flushing port, and the second driving member is used to drive the flushing port to move to the inside or outside of the centrifuge bucket.

[0013] In some examples of the present invention, the cleaning component further comprises: A waste discharge needle is connected to the second driving member, one end of the waste discharge needle is connected to the peristaltic pump, and the other end of the waste discharge needle has a liquid suction port, and the second driving member is used to drive the liquid suction port to move to the inside or outside of the centrifugal bucket.

[0014] According to the present invention, there is also provided a separation method for battery slurry, which is applied to the above-mentioned separation device for battery slurry, and the separation method comprises: Adding the battery slurry into a centrifuge bucket; Add the first dilution liquid into the centrifugal bucket, mix evenly and then centrifuge, and suck out the upper waste liquid after the liquid surface is still; Add the second dilution liquid into the centrifugal bucket, mix well and then centrifuge, and suck out the upper waste liquid after the liquid surface is still; Add the third dilution liquid into the centrifugal bucket, mix well and then centrifuge, and suck out the upper waste liquid after the liquid surface is still; Remove the remaining liquid and filter it.

[0015] In some examples of the present invention, the volume ratio of the first diluent to the battery slurry is 3-4, the volume ratio of the second diluent to the battery slurry is 3-4, and the volume ratio of the third diluent to the battery slurry is 4-10.

[0016] In some examples of the present invention, the centrifugal force is 5 g to 120 g, and the centrifugal time is 5 seconds to 30 seconds.

[0017] In some examples of the present invention, the first diluent is an N-methylpyrrolidone solution; The second diluent is a hydrochloric acid solution with a mass fraction of 19%; The third dilution liquid is purified water.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of a separation device for battery slurry provided according to an embodiment of the present invention; Figure 2 A schematic diagram of the cooperation between a cleaning assembly and a centrifugal device according to an embodiment of the present invention; Figure 3 for Figure 1 A local enlarged schematic diagram of the position A in the middle; Figure 4 for Figure 1 A partial enlarged schematic diagram of the position B in the middle; Figure 5 for Figure 1 A partial enlarged schematic diagram of the C position in the middle; Figure 6 The present invention is a flowchart of a method for separating battery slurry according to an embodiment of the present invention.

[0021] Description of reference numerals: 10-Separation equipment; 110- rack; 111-supporting leg; 112-installation portion; 120-centrifugal device; 121-first driving member; 122-centrifuge; 1221-rotating shaft; 1222-rotating arm; 123-centrifuge bucket; 1231-accommodation chamber; 124-detection piece; 125-locking nut; 130-cleaning device; 131-cleaning assembly; 1311-flushing needle; 1311a-flushing port; 1312-waste discharge needle; 1312b-liquid suction port; 133-guide assembly; E-adding / mixing position; F-Waste discharge location. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] Figure 1 It is a structural schematic diagram of a separation device 10 for battery slurry provided according to an embodiment of the present invention; Figure 5 A schematic diagram of the cooperation between the cleaning assembly 131 and the centrifugal device 120 provided according to an embodiment of the present invention; Figure 3 for Figure 1 A local enlarged schematic diagram of the position A in the middle; Figure 4 for Figure 1 A partial enlarged schematic diagram of the position B in the middle; Figure 5 for Figure 1 A partial enlarged schematic diagram of the C position in the middle; Figure 6 The present invention is a flowchart of a method for separating battery slurry according to an embodiment of the present invention.

[0027] Reference below Figure 1-Figure 5A separation device 10 for battery slurry according to an embodiment of the present invention is described, and the separation device 10 includes: a frame 110; a centrifugal device 120, the centrifugal device 120 is connected to the frame 110, and the centrifugal device 120 is used to add and centrifugally separate battery slurry; a cleaning device 130, the cleaning device 130 is movably connected to the frame 110, and the cleaning device 130 is used to add diluent to the inside of the centrifugal device 120, or the cleaning device 130 is used to discharge waste liquid from the inside of the centrifugal device 120; a controller (not shown in the figure), the controller is electrically connected to the centrifugal device 120 and the cleaning device 130, respectively, and the controller is used to control the start and stop states of the centrifugal device 120 and the cleaning device 130.

[0028] Specifically, the frame 110 may be a frame structure made of metal material, and the frame 110 may include support legs 111 and a mounting portion 112. Figure 1 In the direction indicated by X in the figure), the support leg 111 can be fixedly installed at the bottom of the mounting portion 112 by welding, threaded connection, riveting or integral molding connection, so that the support leg 111 can support and fix the mounting portion 112, so that the user can operate the separation device 10 to centrifuge the battery slurry.

[0029] The centrifugal device 120 can be movably arranged in the mounting portion 112, and the centrifugal device 120 can rotate in the horizontal direction relative to the mounting portion 112. The battery slurry can be installed in some components of the centrifugal device 120 (i.e., in the centrifugal barrel 123 in the following embodiment). The centrifugal device 120 can drive the battery slurry to rotate when rotating horizontally. Under the action of centrifugal force, the battery slurry can be divided into upper and lower parts. Among them, the upper part is a liquid solution, and the lower part is solid impurities. Such a configuration allows the solid impurities in the battery slurry to be quickly separated by the centrifugal device 120, so that the user can quickly detect the battery slurry, which greatly improves the detection efficiency of the battery slurry.

[0030] It should be noted that the impurities mixed in the battery slurry can be magnetic metal particles such as iron, non-magnetic metal particles such as copper, aluminum or stainless steel, and non-metallic particles such as polymer materials. In this way, under the action of centrifugal force, magnetic metal particles or non-magnetic metal particles can quickly settle to the bottom of the battery slurry. With this arrangement, all impurities doped in the battery slurry can be separated, greatly reducing the missed detection rate of the battery slurry and significantly improving the detection accuracy of the battery slurry.

[0031] The cleaning device 130 can be movably arranged in the mounting portion 112, the cleaning device 130 can move relative to the mounting portion 112 along the height direction of the separation device 10, and the cleaning device 130 can be arranged relatively and spaced above the mounting portion 112. The cleaning device 130 can be connected to a diluent container (not shown in the figure), so that the diluent can be added to the centrifugal device 120 (i.e., the centrifugal bucket 123) through the cleaning device 130 to dilute the battery slurry, or to clean the inner wall of the centrifugal bucket 123 so that impurities attached to the inner wall of the centrifugal bucket 123 during centrifugation can be washed to the bottom of the centrifugal bucket 123.

[0032] Furthermore, the centrifugal device 120 can also be connected to a waste liquid container (not shown in the figure), so that the cleaning device 130 can suck the waste liquid after centrifugal separation into the waste liquid container, so that the battery slurry can be diluted multiple times to accelerate the sedimentation and separation speed of impurities, thereby improving the detection efficiency and detection accuracy of the battery slurry.

[0033] It should be noted that after the cleaning device 130 adds the diluent into the centrifugal bucket 123, the cleaning device 130 can also quickly mix the diluent and the battery slurry by suction and exhalation. This arrangement allows impurities in the battery slurry to be accelerated to settle at the bottom of the centrifugal bucket 123 under the action of centrifugal force, thereby effectively avoiding missed detection of impurities, especially some non-magnetic metal particles.

[0034] The controller can be fixedly installed at the top position of the mounting portion 112, or can be fixedly installed at the side position of the mounting portion 112. The controller can be electrically connected to the centrifugal device 120 and the cleaning device 130 respectively through cables (not shown in the figure). The controller can send work instructions to the centrifugal device 120 and the cleaning device 130. This arrangement allows the user to quickly separate and detect the battery slurry, thereby improving the detection efficiency of the battery slurry.

[0035] Furthermore, the operation process can be preset in the controller. For example, when there are multiple types of diluents, the user can preset the order of adding multiple diluents in the controller, so that when the separation device 10 is working, the diluents can be added in sequence to dilute the battery slurry. In addition, the number of centrifugal separations, the magnitude of the centrifugal force, the centrifugal time and other related parameters can be preset in the controller. This setting allows the battery slurry to be accurately and quickly separated, so that all impurities in the battery slurry can be quickly precipitated and separated, thereby greatly improving the detection efficiency of the battery slurry and effectively preventing the occurrence of impurity leakage.

[0036] According to the separation device 10 provided by the embodiment of the present invention, by setting the frame 110, the main parts of the separation device 10 can be fixedly supported, so as to effectively simplify the composition structure of the separation device 10 and reduce the space occupied by the separation device 10. By setting the centrifugal device 120, the battery slurry is centrifugally separated, so that the precipitation separation speed of impurities in the battery slurry can be accelerated, and the detection efficiency of the battery slurry can be improved. By setting the cleaning device 130, the battery slurry can be diluted to increase the separation rate of impurities and battery slurry. In addition, the inside of the centrifugal device 120 can be cleaned in time to avoid impurities attached to the centrifugal device 120 after centrifugal separation from mixing into the battery slurry, so as to effectively avoid impurity leakage. By setting the controller, the working state of the centrifugal device 120 and the cleaning device 130 can be controlled so that the two can work in coordination, so as to improve the separation speed of the battery slurry, significantly improve the detection efficiency and detection accuracy of the battery slurry, and effectively prevent the occurrence of leakage.

[0037] Please continue to see Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, the centrifugal device 120 includes: a first driving member 121, the first driving member 121 is connected to the frame 110; a centrifuge 122, the centrifuge 122 is coaxially sleeved and transmission-connected with the driving shaft of the first driving member 121; a centrifugal bucket 123, the centrifugal bucket 123 is connected to the rotating arm 1222 of the centrifuge 122, the battery slurry is added to the centrifugal bucket 123, and the first driving member 121 drives the centrifugal bucket 123 to rotate through the centrifuge 122 to centrifugally separate the battery slurry.

[0038] Specifically, the first driving member 121 can be configured as a driving motor. Along the height direction of the separation device 10, the first driving member 121 can be fixedly mounted at the bottom position of the mounting portion 112. The specific connection method can be welding or threaded connection, which is not specifically limited in the embodiment of the present invention. The driving shaft of the first driving member 121 can move through the bottom position of the mounting portion 112 and be transmission-connected with the rotating shaft 1221 of the centrifuge 122, so that the centrifuge 122 can be driven to rotate by the first driving member 121. In addition, the first driving member 121 can be electrically connected to the controller via a cable, so that the start and stop state of the centrifuge 122 can be controlled by the first driving member 121.

[0039] Further, the centrifuge 122 can be movably mounted in the mounting portion 112 through a bearing (not shown in the figure), the central axis of the centrifuge 122 coincides with the central axis of the first driving member 121, one end of the rotating shaft 1221 of the centrifuge 122 can be coaxially connected to the driving shaft of the first driving member 121 through a coupling or a spline, and the other end of the rotating shaft 1221 of the centrifuge 122 can be fixedly connected to the rotating arm 1222 of the centrifuge 122 by welding, threaded connection or integral molding connection. It should be noted that the number of rotating arms 1222 in the embodiment of the present invention is not specifically limited, for example, it can be one, two or more. In a specific implementation, the number of rotating arms 1222 can be multiple, and the multiple rotating arms 1222 can be arranged at equal intervals around the circumference of the rotating shaft 1221, so that the rotating shaft 1221 can maintain a relatively balanced state when rotating at high speed, thereby improving the stability and reliability of the rotating shaft 1221 when rotating at high speed.

[0040] For further information, please see Figure 1 and Figure 2 As shown, the centrifugal device 120 may further include a locking nut 125. After the rotating arm 1222 is sleeved on the end of the rotating shaft 1221, the rotating arm 1222 and the rotating shaft 1221 can be locked and fixed together by the locking nut 125. In this way, the separation device 10 can be disassembled or assembled by the locking nut 125, so that the separation device 10 can be repaired and protected or parts can be replaced.

[0041] Please continue to see Figure 1 and Figure 2 As shown, the number of centrifugal buckets 123 can match the number of rotating arms 1222, such as multiple centrifugal buckets 123 can be connected to multiple rotating arms 1222 in a one-to-one correspondence. The centrifugal bucket 123 can be connected to the end of the rotating arm 1222 away from the rotating shaft 1221, and the specific connection method can be hinged, etc., so that the rotating arm 1222 can swing the centrifugal bucket 123 flat when rotating, so that the centrifugal bucket 123 can centrifugally separate the battery slurry. The interior of the centrifugal bucket 123 is provided with a accommodating chamber 1231, and the accommodating chamber 1231 has an opening (not shown in the figure). The battery slurry can be installed in the accommodating chamber 1231 through the opening. With such a configuration, the rotating shaft 1221 can be driven to rotate by the first driving member 121, and the rotating shaft 1221 drives the centrifugal bucket 123 to rotate through the rotating arm 1222. The battery slurry in the centrifugal bucket 123 can be quickly separated under the action of centrifugal force, and the impurities in the battery slurry can be accelerated to precipitate at the bottom of the centrifugal bucket 123, thereby increasing the separation speed of the battery slurry and improving the detection efficiency of the battery slurry.

[0042] It should be noted that the cleaning device 130 can be arranged opposite to and spaced apart from the opening of the accommodating chamber 1231, and the controller can control the cleaning device 130 to move downward along the height direction of the separation equipment 10, so that some components of the cleaning device 130 can extend into the accommodating chamber 1231 through the opening, so as to add diluent or to pump and discharge waste liquid.

[0043] In addition, when the centrifugal device 120 is performing centrifugal separation, the cleaning device 130 can be moved upward along the height direction of the separation device 10 under the control of the controller and separated from the centrifugal device 120. Such a configuration can avoid interference between the centrifugal device 120 and the cleaning device 130 during centrifugal separation, thereby improving the overall stability and reliability of the separation device 10, and simultaneously improving the service life and safety performance of the separation device 10.

[0044] Please continue to see Figure 1-Figure 3 As shown, according to another embodiment of the present invention, the centrifuge 120 further includes: a detection member 124 , the detection member 124 is connected to the frame 110 , and the detection member 124 is opposite to and spaced from the centrifuge 122 , and the detection member 124 is used to detect the initial position of the centrifuge 122 .

[0045] Specifically, along the height direction of the separation equipment 10, the detection member 124 can be fixedly set at the bottom position of the mounting portion 112, the detection member 124 can be opposite to and spaced from the rotating shaft 1221, the detection member 124 can be constructed as an origin sensor, the detection member 124 can be electrically connected to the controller, the detection member 124 can be used to monitor the initial position of the rotating arm 1222, and then determine the initial position of the centrifugal bucket 123 through the initial position of the rotating arm 1222. With such a configuration, the centrifugal bucket 123 can be accurately detected and positioned by the detection member 124, so that the cleaning device 130 can be accurately extended into the centrifugal bucket 123 to perform tasks such as adding liquid and discharging waste, thereby effectively avoiding failures such as the inability of the cleaning device 130 and the centrifugal device 120 to accurately cooperate with each other after the position of the centrifugal bucket 123 changes.

[0046] Please continue to see Figure 1 , Figure 2 and Figure 4 As shown, according to another embodiment of the present invention, the cleaning device 130 includes: a second driving member (not shown in the figure), the second driving member is connected to the frame 110; a cleaning component 131, the cleaning component 131 is connected to the driving shaft of the second driving member, and the second driving member is used to drive the cleaning component 131 to move so that at least part of the cleaning component 131 extends into the centrifugal barrel 123.

[0047] Specifically, the second driving member can be configured as a stepping motor or a cylinder, and the second driving member can be fixedly mounted on the top of the mounting portion 112 by threaded connection or welding. In this way, the driving shaft of the second driving member can be fixedly connected to the cleaning assembly 131 to drive the cleaning assembly 131 to rise and fall along the height direction of the separation device 10, so that the cleaning assembly 131 can perform operations such as adding liquid or discharging waste to the centrifugal bucket 123.

[0048] One end of the cleaning component 131 can be connected to the diluent container and the waste liquid container respectively. When the diluent needs to be added to the centrifugal barrel 123 for dilution or cleaning, the second driving member can drive the cleaning component 131 to move downward so that part of the cleaning component 131 can be extended into the centrifugal barrel 123 for adding liquid or cleaning. After completing the above work, the second driving member can drive the cleaning component 131 to move upward and separate from the centrifugal barrel 123, and then the centrifugal barrel 123 starts to rotate to centrifuge the battery slurry; when the separation is completed and the liquid level in the centrifugal barrel 123 is stationary, the second driving member can drive part of the cleaning component 131 to extend into the centrifugal barrel 123 again to suck the waste liquid in the upper part of the centrifugal barrel 123 into the waste liquid container, so as to realize the waste discharge of the centrifugal barrel 123.

[0049] Please continue to participate Figure 1 As shown, further, the cleaning device 130 may also include a guide assembly 133, which may be slidably disposed at the top position of the mounting portion 112, and the guide assembly 133 may slide relative to the mounting portion 112 along the height direction of the separation device 10. The guide assembly 133 may be fixedly connected to the driving shaft of the second driving member and the cleaning assembly 131, respectively, and the second driving member may drive the cleaning assembly 131 to rise and fall through the guide assembly 133, so that the second driving member may synchronously drive the plurality of cleaning assemblies 131 to move through the guide assembly 133, thereby improving the working efficiency of the separation device 10, simplifying the component structure of the separation device 10, reducing the manufacturing cost of the separation device 10, and significantly improving the stability and reliability of the separation device 10.

[0050] It should be noted that the guide assembly 133 can be a combination of a slide rail and a slider, or a combination of a lead screw and a lead screw nut. The embodiments of the present invention do not specifically limit this. In the following embodiments, the combination of a slide rail and a slider is used as an example for explanation.

[0051] Please continue to see Figure 1 , Figure 2 and Figure 4As shown, according to an optional embodiment of the present invention, the cleaning component 131 includes: a flushing needle 1311, the flushing needle 1311 is connected to the second driving member, one end of the flushing needle 1311 has a liquid inlet (not shown in the figure), the liquid inlet is used for adding diluent, the other end of the flushing needle 1311 has a flushing port 1311a, and the second driving member is used to drive the flushing port 1311a to move to the inside or outside of the centrifugal bucket 123.

[0052] Specifically, the flushing needle 1311 can be constructed as a hollow structure, and the flushing needle 1311 can be connected to the driving shaft of the second driving member, or can be connected to the driving shaft of the second driving member through the guide assembly 133 in the above embodiment. One end of the flushing needle 1311 can be connected to the diluent container, and the side wall of the other end of the flushing needle 1311 can be provided with a flushing port 1311a, so that the diluent can be sprayed into the centrifugal bucket 123 from the flushing port 1311a after flowing through the flushing needle 1311.

[0053] Furthermore, after the flushing needle 1311 is extended into the interior of the centrifugal barrel 123, the flushing port 1311a can be arranged opposite to and spaced from the inner wall of the centrifugal barrel 123, so that the diluent sprayed from the flushing port 1311a can be sprayed on the inner wall of the centrifugal barrel 123, thereby achieving rapid cleaning of the inner wall of the centrifugal barrel 123, so that impurities attached to the inner wall of the centrifugal barrel 123 can quickly settle to the bottom of the centrifugal barrel 123, avoiding the risk of missed detection of battery slurry due to impurities being discharged with waste liquid.

[0054] Please continue to see Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, according to a further embodiment of the present invention, the cleaning component 131 also includes: a waste discharge needle 1312, the waste discharge needle 1312 is connected to the second driving member, one end of the waste discharge needle 1312 is connected to the peristaltic pump 132, and the other end of the waste discharge needle 1312 has a liquid suction port 1312b, and the second driving member is used to drive the liquid suction port 1312b to move to the inside or outside of the centrifugal bucket 123.

[0055] Specifically, the waste discharge needle 1312 can also be constructed as a hollow structure, and the waste discharge needle 1312 can be coaxially sleeved inside the flushing needle 1311 in an integrally formed manner. Such a configuration can improve the production efficiency of the separation device 10 and reduce the manufacturing cost of the separation device 10. The waste discharge needle 1312 can be directly connected to the drive shaft of the second drive member, or can be connected to the drive shaft of the second drive member through the guide assembly 133 in the above embodiment, or can be connected to the drive shaft of the second drive member through the flushing needle 1311. This is not specifically limited in the embodiment of the present invention.

[0056] Furthermore, both ends of the waste discharge needle 1312 can extend from the inside of the flushing needle 1311, and the liquid suction port 1312b can be set at one of the ends, and the other end of the waste discharge needle 1312 can be connected to the peristaltic pump 132, and the peristaltic pump 132 can be electrically connected to the controller, and the start and stop states of the peristaltic pump 132 are controlled by the controller. The peristaltic pump 132 is synchronously connected to the waste liquid container. With such an arrangement, after the waste discharge needle 1312 is extended into the centrifugal bucket 123, the waste liquid in the upper part of the centrifugal bucket 123 can be sucked into the waste liquid container by the forward rotation of the peristaltic pump 132.

[0057] In addition, if the battery slurry and diluent in the centrifugal bucket 123 need to be mixed, the peristaltic pump 132 can be controlled by the controller to rotate forward and reverse, so that the waste discharge needle 1312 can suck and discharge the battery slurry to mix it.

[0058] Please continue to see Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in an embodiment of the present invention, the liquid adding position of the flushing needle 1311 / the mixing position E of the waste discharge needle 1312 can be pre-set in the centrifugal barrel 123 according to the lifting stroke of the flushing needle 1311 / the waste discharge needle 1312, that is, when the flushing needle 1311 moves to the position E, the controller can control the second driving member to stop running, and then the flushing needle 1311 can start the liquid adding and cleaning work, and after the liquid adding is completed, the controller controls the peristaltic pump 132 to rotate forward and reverse, and then the waste discharge needle 1312 can perform the suction and discharge mixing work; according to the lifting stroke of the waste discharge needle 1312, the waste discharge position F of the waste discharge needle 1312 can be pre-set in the centrifugal barrel 123, that is, when the waste discharge needle 1312 moves to this position, the controller can control the second driving member to stop running, and then the controller controls the peristaltic pump 132 to rotate forward, and then the waste discharge needle 1312 can perform the suction and waste discharge work.

[0059] Please continue to participate Figure 1 and Figure 6 As shown, the embodiment of the present invention further provides a separation method for battery slurry, which is applied to the separation device 10 provided in the above embodiment, wherein the specific structure and working principle of the separation device 10 have been explained in detail in the above embodiment, and will not be repeated here one by one. The separation method includes: S201, adding battery slurry into the centrifugal bucket 123; For example, please see Figure 1-Figure 6 As shown, the user can first add the battery slurry mixed with impurities into the accommodating cavity 1231 of the centrifugal bucket 123 through the opening, and measure and record the volume and other parameters of the battery slurry before adding.

[0060] S202, adding the first diluent into the centrifugal bucket 123, mixing evenly and then centrifuging, and sucking out the upper waste liquid after the liquid surface is still; For example, please see Figure 1-Figure 6 As shown, after completing the above steps, a certain amount of the first diluent is added to the centrifugal barrel 123 through the flushing needle 1311 to dilute the battery slurry, and the first diluent can effectively clean the inner wall of the centrifugal barrel 123 while adding. After the addition is completed, the mixed liquid is sucked and spit out by the waste discharge needle 1312 to mix it evenly, so that the first diluent can be fully mixed with the battery slurry, thereby accelerating the precipitation and separation speed of impurities in the battery slurry. After mixing, after the waste discharge needle 1312 is separated from the centrifugal barrel 123, the centrifuge 122 can be controlled to drive the centrifugal barrel 123 to rotate, so that the battery slurry can be quickly separated under the action of centrifugal force, so that impurities can be quickly precipitated at the bottom of the centrifugal barrel 123. After the centrifugation is completed and the liquid level in the centrifugal barrel 123 is still, the waste discharge needle 1312 is controlled to suck the liquid in the upper part of the centrifugal barrel 123 into the waste liquid container to achieve waste discharge.

[0061] It should be noted that the first diluent may be NMP (N-methylpyrrolidone) solution, and the volume of the first diluent may be 3 times the volume of the battery slurry. The centrifugal force may be controlled between 5g-120g, and the centrifugal time may be controlled between 5 seconds-30 seconds.

[0062] Furthermore, step S202 may be repeated one or more times according to the effect after separation, and during the repeated operation, the volume of the first diluent may be 3 or 4 times the volume of the battery slurry, which is not specifically limited in this embodiment of the present invention.

[0063] S203, adding the second diluent into the centrifugal bucket 123, mixing evenly and then centrifuging, and sucking out the upper waste liquid after the liquid surface is still; For example, please see Figure 1-Figure 6As shown, after completing the above steps, a certain amount of the second diluent is added to the centrifugal barrel 123 through the flushing needle 1311 to dilute the battery slurry again, and the second diluent can effectively clean the inner wall of the centrifugal barrel 123 again while adding. After the addition is completed, the mixed liquid is sucked and spitted again through the waste discharge needle 1312 to mix evenly, so that the second diluent can be fully mixed with the battery slurry, thereby accelerating the precipitation and separation speed of impurities in the battery slurry. After mixing, after the waste discharge needle 1312 is separated from the centrifugal barrel 123, the centrifuge 122 can be controlled to drive the centrifugal barrel 123 to rotate, so that the battery slurry can be quickly separated under the action of centrifugal force, so that impurities can be quickly precipitated at the bottom of the centrifugal barrel 123. After the centrifugation is completed and the liquid level in the centrifugal barrel 123 is stationary, the waste discharge needle 1312 is controlled to suck the liquid in the upper part of the centrifugal barrel 123 into the waste liquid container to achieve waste discharge.

[0064] It should be noted that the second diluent may be a hydrochloric acid solution with a concentration of 19%, and the volume of the second diluent may be 4 times the volume of the battery slurry. The centrifugal force may be controlled between 5g-120g, and the centrifugal time may be controlled between 5 seconds-30 seconds.

[0065] Furthermore, step S203 may be repeated one or more times according to the effect after separation, and during the repeated operation, the volume of the second diluent may be 4 times the volume of the battery slurry, which is not specifically limited in this embodiment of the present invention.

[0066] S204, adding the third dilution liquid into the centrifugal bucket 123, mixing evenly and then centrifuging, and sucking out the upper waste liquid after the liquid surface is still; For example, please see Figure 1-Figure 6 As shown, after completing the above steps, a certain amount of the third diluent is added to the centrifugal barrel 123 through the flushing needle 1311 to dilute the battery slurry again, and the third diluent can effectively clean the inner wall of the centrifugal barrel 123 again while adding. After the addition is completed, the mixed liquid is sucked and spitted again through the waste discharge needle 1312 to mix evenly, so that the third diluent can be fully mixed with the battery slurry, thereby accelerating the precipitation and separation speed of impurities in the battery slurry. After mixing, after the waste discharge needle 1312 is separated from the centrifugal barrel 123, the centrifuge 122 can be controlled to drive the centrifugal barrel 123 to rotate, so that the battery slurry can be quickly separated under the action of centrifugal force, so that impurities can be quickly precipitated at the bottom of the centrifugal barrel 123. After the centrifugation is completed and the liquid level in the centrifugal barrel 123 is still, the waste discharge needle 1312 is controlled to suck the liquid in the upper part of the centrifugal barrel 123 into the waste liquid container to achieve waste discharge.

[0067] It should be noted that the third diluent may be pure water, and the volume of the third diluent may be 4 times the volume of the battery slurry. The centrifugal force may be controlled between 5g-120g, and the centrifugal time may be controlled between 5 seconds-30 seconds.

[0068] Furthermore, step S204 may be repeated one or more times according to the effect after separation, and during the repeated operation, the volume of the second diluent may be 4 times the volume of the battery slurry, which is not specifically limited in this embodiment of the present invention.

[0069] S205, taking out the remaining liquid and filtering and separating it.

[0070] For example, after completing the above step S204, pure water ten times the amount of the battery slurry can be added to the centrifugal bucket 123, and then the liquid in the centrifugal bucket 123 is filtered using a filter. The fixed substance obtained by filtration is the impurity mixed in the battery slurry. The user can take the remaining impurities for testing, so as to quickly determine whether the content of impurities such as metals in the battery slurry exceeds the standard.

[0071] Please continue to see Figure 6 As shown, in an optional manner of the present invention, in the above liquid separation method, the volume ratio of the first diluent to the battery slurry is 3-4, the volume ratio of the second diluent to the battery slurry is 3-4, and the volume ratio of the third diluent to the battery slurry is 4-10. In the above liquid separation method, the centrifugal force is 5g-120g, and the centrifugal time is 5 seconds-30 seconds. The first diluent in the above separation method is N-methylpyrrolidone solution; the second diluent is a hydrochloric acid solution with a mass fraction of 19%; and the third diluent is pure water.

[0072] Specifically, when it is necessary to separate metal impurities with higher density, such as copper or iron, the centrifugal force can be set to 5g, and the centrifugal time can be set to 5 seconds. Since metals with higher density are easier to precipitate and separate, the required centrifugal force and centrifugal time are relatively small; when it is necessary to separate non-metallic impurities with lower density, such as polymer materials, the centrifugal force can be set to 30g, and the centrifugal time can be set to 30 seconds. Since non-metals with lower density are not easy to precipitate and separate, the required centrifugal force and centrifugal time are relatively large; when it is necessary to separate metal impurities with density between the above two types, such as aluminum or titanium alloy, the centrifugal force can be set to 10g, and the centrifugal time is 10 seconds. Since its density is between the above two impurities, the required centrifugal force and centrifugal time are both between the above two impurities. This setting allows users to set the relevant parameters in the above separation method in a targeted manner according to different impurity types, so that all impurities contained in the battery slurry can be centrifuged, thereby greatly improving the detection efficiency of the battery slurry and effectively preventing the occurrence of impurity leakage.

[0073] The following is one of the specific operation methods and processes provided by the present invention: Please continue to see Figure 1-Figure 6 As shown, after the battery slurry is added to the centrifugal barrel 123, the flushing needle 1311 / waste discharge needle 1312 moves from the initial position to the liquid addition / mixing position E, and the flushing needle 1311 spirally flushes obliquely toward the inner barrel wall of the centrifugal barrel 123 through the flushing port 1311a (when the centrifugal barrel 123 is flushed obliquely, the flushing area is larger, which is conducive to flushing and mixing), and after flushing to a fixed liquid level (the liquid level is calculated by the system to calculate a fixed input amount), the waste discharge needle 1312 is used for suction and exhalation mixing (after sucking in a certain amount of liquid, it is ejected at high speed, forming a water flow at the bottom to impact the battery slurry at the bottom of the centrifugal barrel 123, and then it is mixed after multiple cycles). After suction and exhalation mixing, the flushing needle 1311 / waste discharge needle 1312 moves to the initial position, the centrifuge 122 rotates for centrifugal separation, and after stopping positioning, the waste discharge needle 1312 moves to the waste discharge position F, and then the upper waste liquid is sucked through the waste discharge needle 1312.

[0074] Move the flushing needle 1311 to the liquid adding position E, and flush the flushing needle 1311 through the flushing port 1311a and spirally flush along the barrel wall. After flushing to a fixed liquid level, suction and spitting are performed through the waste discharge needle 1312 to mix. After suction and spitting, the flushing needle 1311 / waste discharge needle 1312 moves to the initial position, and the centrifuge 122 rotates for centrifugal separation. After stopping and positioning, the waste discharge needle 1312 moves to the waste discharge position F, and then the upper waste liquid is sucked through the waste discharge needle 1312. After repeating the operation five times, pure water is added through the flushing needle 1311, and after flushing and spitting, the liquid inside the centrifugal barrel 123 can be taken out for filtration and slice testing.

[0075] Other components of the separation device 10 and separation method for battery slurry according to the embodiment of the present invention, such as N-methylpyrrolidone solution, hydrochloric acid, slide rails, sliders, lead screw nuts, etc., as well as operations are well known to ordinary technicians in the field and will not be described in detail here.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0077] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A separation device for battery slurry, characterized in that: include: frame; A centrifugal device, the centrifugal device is connected to the frame, and the centrifugal device is used to load and centrifugally separate the battery slurry; A cleaning device, the cleaning device is movably connected to the frame, the cleaning device is used to add diluent into the centrifugal device, or the cleaning device is used to discharge waste liquid from the centrifugal device; A controller is electrically connected to the centrifugal device and the cleaning device respectively, and is used to control the start and stop states of the centrifugal device and the cleaning device.

2. The separation device for battery slurry according to claim 1, characterized in that: The centrifugal device comprises: a first driving member connected to the frame; A centrifuge, wherein the centrifuge is coaxially sleeved and drivingly connected with the driving shaft of the first driving member; A centrifugal bucket is hinged to the rotating arm of the centrifuge, the battery slurry is loaded in the centrifugal bucket, and the first driving member drives the centrifugal bucket to rotate through the centrifuge to centrifugally separate the battery slurry.

3. The separation device for battery slurry according to claim 2, characterized in that: The centrifugal device also includes: A detection member is connected to the frame, and the detection member is opposite to and spaced from the centrifuge, and the detection member is used to detect an initial position of the centrifuge.

4. The separation device for battery slurry according to claim 2, characterized in that: The cleaning device comprises: a second driving member, the second driving member being connected to the frame; A cleaning assembly is connected to the driving shaft of the second driving member, and the second driving member is used to drive the cleaning assembly to move so that at least a portion of the cleaning assembly extends into the centrifugal barrel.

5. The separation device for battery slurry according to claim 4, characterized in that: The cleaning assembly comprises: A flushing needle is connected to the second driving member, one end of the flushing needle has a liquid inlet, the liquid inlet is used to add the diluent, the other end of the flushing needle has a flushing port, and the second driving member is used to drive the flushing port to move to the inside or outside of the centrifuge bucket.

6. The separation device for battery slurry according to claim 5, characterized in that: The cleaning assembly also includes: A waste discharge needle is connected to the second driving member, one end of the waste discharge needle is connected to the peristaltic pump, and the other end of the waste discharge needle has a liquid suction port, and the second driving member is used to drive the liquid suction port to move to the inside or outside of the centrifugal bucket.

7. A method for separating battery slurry, characterized in that: Applied to the separation device for battery slurry according to any one of claims 1 to 6, the separation method comprises: Adding the battery slurry into a centrifuge bucket; Add the first diluent into the centrifugal bucket, mix evenly and then centrifuge, and suck out the waste liquid on the top after the liquid surface is still; Add the second diluent into the centrifugal bucket, mix evenly and then centrifuge, and suck out the waste liquid on the top after the liquid surface is still; Add the third diluent into the centrifugal bucket, mix evenly and then centrifuge, and suck out the waste liquid on the top after the liquid surface is still; Remove the remaining liquid and filter it.

8. The separation method for battery slurry according to claim 7, characterized in that: The volume ratio of the first diluent to the battery slurry is 3-4, the volume ratio of the second diluent to the battery slurry is 3-4, and the volume ratio of the third diluent to the battery slurry is 4-10.

9. The separation method for battery slurry according to claim 7, characterized in that: The centrifugal force is 5 g to 120 g, and the centrifugal time is 5 seconds to 30 seconds.

10. The separation method for battery slurry according to claim 8, characterized in that: The first diluent is N-methylpyrrolidone solution; The second diluent is a hydrochloric acid solution with a mass fraction of 19%; The third diluent is pure water.

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