Demagnetizing equipment and demagnetizing detection system

Abstract

The utility model discloses a demagnetization device and a demagnetization detection system. The demagnetizing equipment comprises a mixing device, a spraying device and a magnetic adsorption device. The mixing device is used for mixing a positive electrode material and water and is provided with a mixed slurry outlet; the spraying device comprises a driving part and a nozzle; the nozzle is connected with the mixed slurry outlet; the driving part is connected with the nozzle and controls the nozzle to move, so that the nozzle throws out mixed slurry diffused in a mist state; and the magnetic adsorption device is arranged below the spray head. According to the structure, the positive electrode material and the water are mixed through the mixing device, the obtained mixed slurry is thrown out through the moving spray head, and the thrown-out mixed slurry is in a fogdrop shape, good in dispersity and capable of uniformly falling on the magnetic adsorption device below, so that the positive electrode material in the mixed slurry is more fully contacted with the magnetic adsorption device; the adsorption effect of the magnetic adsorption device on the magnetic metal particles in the positive electrode material can be improved, the demagnetization effect is improved, and the demagnetization operation is simple.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a demagnetization device and a demagnetization detection system. Background Art

[0002] Battery cells can achieve high energy density performance through high specific capacity positive electrode materials, but the presence of magnetic metal particles in the positive electrode materials will affect the capacity and safety performance of the battery cells. Therefore, it is necessary to measure the magnetic metal particles in the positive electrode materials. The existing solutions for extracting magnetic metal particles from positive electrode materials are difficult to operate and have poor demagnetization effects. Utility Model Content

[0003] In view of the above problems, the present application provides a demagnetization device and a demagnetization detection system, which can solve the problems.

[0004] In order to solve the above technical problems, a technical solution adopted in the present application is to provide a demagnetization device, which includes: a mixing device, which is used to mix positive electrode materials and water, and the mixing device has a mixed slurry outlet; a spraying device, which includes a driving member and a nozzle, and the nozzle is connected to the mixed slurry outlet; the driving member is connected to the nozzle, and the driving member controls the movement of the nozzle so that the nozzle throws out the mixed slurry in a mist-like diffusion state; a magnetic adsorption device, which includes an electromagnetic member, and the electromagnetic member is a hollow structure, and the magnetic adsorption device is arranged below the nozzle.

[0005] As described above, the positive electrode material and water are first mixed through a mixing device, and the obtained mixed slurry is thrown out through a moving nozzle. The thrown mixed slurry is in the form of droplets with good dispersion, and can fall evenly on the magnetic adsorption device below, so that the positive electrode material in the mixed slurry is in contact with the magnetic adsorption device more fully, which can improve the adsorption effect of the magnetic adsorption device on the magnetic metal particles in the positive electrode material, improve the demagnetization effect, and the demagnetization operation is simple.

[0006] In a possible implementation, the mixing device includes: a first shell having a first cavity, the first shell having one or more inlets; a power device;

[0007] A stirring member is disposed in the first cavity, the power device is connected to the stirring member, and the power device controls the movement of the stirring member.

[0008] As described above, the water and the positive electrode material in the first cavity are stirred by the stirring member, so that the water and the positive electrode material are mixed better.

[0009] In a possible implementation manner, the power device controls the rotation of the stirring element.

[0010] As described above, the agitator rotates to stir the positive electrode material and water, so that the water and the positive electrode material are mixed well.

[0011] In a possible implementation, the nozzle is connected to the mixed slurry outlet through a mixing liquid pipe.

[0012] As described above, the mixing device can be connected to the nozzle, and the mixed slurry mixed in the mixing device can enter the nozzle.

[0013] In a possible implementation manner, the driving member controls the nozzle to rotate.

[0014] In the above-mentioned rotating motion mode, the mixed slurry is thrown out and spread around under the action of centrifugal force, and the mixed slurry has better dispersion.

[0015] In a possible implementation manner, the driving member controls the reciprocating motion of the spray head.

[0016] As mentioned above, the reciprocating motion of the nozzle can also throw out the mixed slurry, so that the mixed slurry is in the form of droplets.

[0017] In a possible implementation, the magnetic adsorption device includes: a second shell having a second cavity, and the nozzle is located in the second cavity; the electromagnetic component is disposed in the second cavity, and the electromagnetic component is disposed below the nozzle.

[0018] As mentioned above, the nozzle is located in the second cavity, so that the mixed slurry thrown out by the nozzle can be fully collected. The nozzle and the electromagnetic component are both located in the second cavity, so that the mixed slurry thrown out by the nozzle can better fall on the electromagnetic component. The electromagnetic component has magnetic attraction when it is powered on, and does not have magnetic attraction when it is powered off, which is convenient for collecting magnetic metal particles.

[0019] In a possible implementation manner, the first shell further includes a fixing member, and the first shell is fixed to the second shell through the fixing member.

[0020] The above structure enables the first shell to be fixed on the second shell, so that the structural stability of the demagnetization device is better and the space occupied by the demagnetization device is reduced.

[0021] In a possible implementation, the electromagnetic component includes a plurality of spliced ​​magnetic strips, through holes extending in a vertical direction are provided between the magnetic strips, and the spacing between the magnetic strips is adjustable.

[0022] As mentioned above, the electromagnetic components can be spliced ​​so that the electromagnetic components can provide different magnetic field strengths to meet different usage requirements.

[0023] In a possible implementation manner, in the horizontal direction, the electromagnetic component and the second cavity have the same shape and size.

[0024] The above method can make the thrown mixed slurry fall onto the electromagnetic component more fully.

[0025] In a possible implementation manner, the bottom of the second shell has a discharge port.

[0026] The above makes it easy for materials to flow out from the bottom.

[0027] In a possible implementation manner, the mixing liquid pipe and / or the discharge port is provided with a switch device.

[0028] In the above, the positive electrode material and water can be fully mixed in the first cavity and then thrown out through the nozzle. The switch device can also control the flow rate of the mixed slurry flowing through the mixed slurry and control the material to flow out from the bottom of the second shell.

[0029] In a possible implementation, the magnetic adsorption device further includes: a power supply device, the power supply device is connected to the electromagnetic component, and the power supply device provides an electric current with an adjustable magnitude.

[0030] By providing a power supply device, a current with a stable and adjustable size can be provided to the electromagnetic component to meet different usage requirements.

[0031] In a possible implementation, the second shell is provided with one or more air inlets;

[0032] The second shell is provided with one or more air holes, and the air holes are provided with filters.

[0033] An air inlet is provided to blow air into the second cavity to blow off the magnetic metal particles attached to the electromagnetic component.

[0034] In a possible implementation manner, the air inlet is disposed on the top surface, the bottom surface and the side surface of the second shell.

[0035] By arranging air inlets on multiple sides, air can be blown into the second cavity from multiple angles, which can better blow off the magnetic metal particles attached to the electromagnetic component.

[0036] In a possible implementation manner, the magnetic adsorption device is provided with a heating device.

[0037] The magnetic metal particles adsorbed on the electromagnetic part can be dried by the heating device.

[0038] In a possible implementation, the second shell includes an inner shell wall and an outer shell wall, a cavity is formed between the inner shell wall and the outer shell wall, and a heat transfer medium inlet and a heat transfer medium outlet are further provided on the second shell, and the heat transfer medium inlet and the heat transfer medium outlet are both connected to the cavity.

[0039] The above structure can quickly dry the magnetic metal particles.

[0040] In a possible implementation manner, the bottom surface of the second shell is recessed outward to form a groove, and the discharge port is located at the bottom of the groove.

[0041] The above structure can prevent materials from accumulating at the bottom of the second cavity.

[0042] In a possible implementation, a weighing device is provided on the magnetic adsorption device.

[0043] As described above, the collection status of the magnetic metal particles on the magnetic adsorption device can be determined by the weighing device.

[0044] In a possible implementation, the second shell is provided with an observation port, and the observation port is provided with a detachable cover.

[0045] As described above, it is convenient to observe the interior of the second shell through the observation port.

[0046] In order to solve the above technical problems, another technical solution adopted by the present application is to provide a demagnetization detection system, which includes the demagnetization equipment described in any one of the above items.

[0047] The above-mentioned demagnetization detection system first mixes the positive electrode material with water through a mixing device, and the obtained mixed slurry is thrown out through a moving nozzle. The thrown mixed slurry is in the form of droplets with good dispersion, and can fall evenly on the magnetic adsorption device below, so that the positive electrode material in the mixed slurry is in contact with the magnetic adsorption device more fully, which can improve the adsorption effect of the magnetic adsorption device on the magnetic metal particles in the positive electrode material, improve the demagnetization effect, and the demagnetization operation is simple.

[0048] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0050] Figure 1 Schematic diagram of the structure of a demagnetization device according to some embodiments.

[0051] Among them, 100, demagnetization equipment; 10, mixing device; 11, first shell; 12, power device; 13, stirring element; 111, first cavity; 112, feed inlet; 113, fixing element; 20, mixing pipe; 30, spraying device; 31, driving element; 32, nozzle; 40, magnetic adsorption device; 41, second shell; 42, electromagnetic element; 411, inner shell wall; 412, outer shell wall; 413, second cavity; 414, discharge port; 415, air inlet; 416, air vent; 417, heat transfer medium inlet; 418, heat transfer medium outlet; 43, power supply device; 50, weighing device; 60, switch device; 70, observation port. DETAILED DESCRIPTION

[0052] The following is a detailed description of the embodiments of the technical solution of the present application. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0054] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, unless otherwise clearly and specifically defined, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two (including two), and "multiple pieces" refers to more than two (including two).

[0055] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0057] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0058] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] At present, from the perspective of market development, batteries are being used more and more widely. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, the market demand is also constantly expanding.

[0060] Among them, the battery device usually includes a box body and a battery cell assembly arranged in the box body. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel or in mixed connection through a busbar component. Among them, the battery cell can achieve high energy density performance through a positive electrode material with a high specific capacity, but the presence of magnetic metal particles in the positive electrode material will affect the capacity and safety performance of the battery cell. Therefore, it is necessary to measure the magnetic metal particles in the positive electrode material. The solution of magnetic metal particles in the positive electrode material proposed in the prior art is difficult to operate and has a high extraction cost.

[0061] Based on the above considerations, in order to solve the technical problems of difficult operation and high extraction cost in the prior art for extracting magnetic metal particles from positive electrode materials, the present application proposes a demagnetization device and a demagnetization detection system. In the demagnetization device, the positive electrode material is first mixed with water, and the mixed slurry is thrown out through a moving nozzle. The thrown mixed slurry falls on the magnetic adsorption device below, which can improve the adsorption effect of the magnetic adsorption device on the magnetic metal particles in the positive electrode material, and the demagnetization operation is simple.

[0062] For the convenience of description, the following embodiments are described by taking a demagnetization device according to an embodiment of the present application as an example.

[0063] Please refer to Figure 1 , Figure 1 It is a schematic diagram of the structure of a demagnetization device according to some embodiments. The demagnetization device 100 includes a mixing device 10, a spraying device 30 and a magnetic adsorption device 40. The mixing device 10 is used to mix the positive electrode material and water, and the mixing device 10 has a mixed slurry outlet (not marked). The spraying device 30 includes a driving member 31 and a nozzle 32, and the nozzle 32 is connected to the mixed slurry outlet; the driving member 31 is connected to the nozzle 32, and the driving member 31 controls the movement of the nozzle 32 so that the nozzle 32 throws out the mixed slurry in a mist-like diffusion; the magnetic adsorption device 40 includes an electromagnetic member 42, and the electromagnetic member 42 is a hollow structure, and the magnetic adsorption device 40 is arranged below the nozzle 32.

[0064] The mixing device 10 is used to mix the positive electrode material and water that need to be demagnetized. In this embodiment, the mixing device 10 can be specifically a stirring mixing device 10. After the positive electrode material and water are injected into the mixing device 10, the mixing device 10 stirs the positive electrode material and water through the internal stirring member 13 to obtain a mixed slurry. In some other embodiments, the mixing device 10 can also achieve the mixing of the internal positive electrode material and water by tilting, flipping, rotating, moving, etc. of the mixing device 10 itself. There can be one or more mixed slurry outlets on the mixing device 10. The nozzle 32 of the spray device 30 is connected to the mixed slurry outlet, and the mixed slurry after the positive electrode material and water are mixed flows into the nozzle 32 through the mixed slurry outlet. The driving member 31 controls the movement of the nozzle 32. The driving member 31 can be specifically a motor or a cylinder. In this embodiment, the driving member 31 drives the nozzle 32 to rotate. During the rotation of the nozzle 32, the mixed slurry inside the nozzle 32 is subjected to centrifugal force and is thrown out to the surroundings, and becomes a cone shape of mist diffusion. The diffused mixed slurry has good dispersibility and can evenly fall on the magnetic adsorption device 40. In other embodiments, the driving member 31 can also control the reciprocating motion and flipping motion of the mixed slurry, so that the mixed slurry can be thrown out and diffused and then fall on the magnetic adsorption device 40 below. The magnetic adsorption device 40 has magnetism, and after the mixed slurry falls on the magnetic adsorption device 40, the magnetic adsorption device 40 can adsorb the magnetic metal particles in the positive electrode material.

[0065] In the above manner, the positive electrode material and water are first mixed through the mixing device 10, and the obtained mixed slurry is thrown out through the moving nozzle 32. The thrown mixed slurry is in the form of droplets and has good dispersion. It can evenly fall on the magnetic adsorption device 40 below, so that the positive electrode material in the mixed slurry is in contact with the magnetic adsorption device 40 more fully, which can improve the adsorption effect of the magnetic adsorption device 40 on the magnetic metal particles in the positive electrode material, improve the demagnetization effect, and the demagnetization operation is simple.

[0066] In a preferred embodiment, in order to improve the effect of the magnetic adsorption device 40 on adsorbing magnetic metal particles, the ratio of the positive electrode material to water injected into the mixing device 10 is 1 to 5. In a specific application scenario, 1 kg of positive electrode material and 5 kg of water are injected into the mixing device 10 for mixing, and then the mixed slurry is thrown out from the nozzle 32.

[0067] In some embodiments, the mixing device 10 includes a first shell 11, the first shell 11 has a first cavity 111, and the first shell 11 has one or more feed ports 112; a power device 12 and a stirring element 13, the stirring element 13 is arranged in the first cavity 111, the power device 12 is connected to the stirring element 13, and the power device 12 controls the movement of the stirring element 13.

[0068] The first shell 11 can be specifically in the form of a rectangle, a cylinder, an irregular polygon, etc. The number of the feed port 112 on the first shell 11 can be one, and the positive electrode material and water are injected through one feed port 112. The number of the feed ports 112 on the first shell 11 can also be two, one of which is the positive electrode material injection port, and the other is the water injection port. In some other embodiments, the number of the feed ports 112 can also be three, four, or other reasonable numbers. The power device 12 can specifically be a motor or a cylinder, etc. The power device 12 can specifically stir the positive electrode material and water by controlling the stirring member 13 to rotate, flip, reciprocate, etc. Among them, the stirring member 13 can specifically be a plate-like structure, a rod-like structure, etc.

[0069] As described above, the water and the positive electrode material in the first cavity 111 are stirred by the stirring member 13, so that the mixing effect of the water and the positive electrode material is better.

[0070] In some embodiments, the power device 12 controls the stirring element 13 to rotate.

[0071] Preferably, the first cavity 111 is cylindrical, the stirring member 13 is rod-shaped, the stirring member 13 is arranged at the bottom of the first cavity 111, and the stirring member 13 passes through the center of the bottom surface of the cylinder. The center of the stirring member 13 is connected to the output shaft of the power device 12, and the power device 12 drives the stirring member 13 to rotate through the output shaft. In addition, the power device 12 can also control the rotation speed and rotation duration of the stirring member 13, and after the positive electrode material and water are fully stirred and mixed, they are thrown out through the nozzle 32 to improve the demagnetization effect.

[0072] The mixing effect is good when the stirring member 13 rotates. In addition, the stirring member 13 is arranged at the bottom of the first cavity 111, and the stirring member 13 can stir the positive electrode material deposited at the bottom of the first cavity 111, thereby improving the mixing effect of the positive electrode material and water.

[0073] In some embodiments, the first shell 11 and the stirring member 13 are both made of organic polymer materials, which are light, tough, and not easy to break. The stirring member 13 is not easily damaged during the process of stirring the positive electrode material and water, and can reduce the mixing of foreign matter into the mixed slurry.

[0074] In some embodiments, the nozzle 32 is connected to the mixed slurry outlet through the mixing pipe 20.

[0075] The driving member 31 is arranged outside the mixing tube 20 and connected to the nozzle 32. In this embodiment, the driving member 31 also includes a power shaft (not shown), which is arranged inside the mixing tube 20. The driving member 31 is connected to the nozzle 32 via the power shaft to drive the nozzle 32 to rotate. In other embodiments, the power shaft can also be arranged outside the mixing tube 20 and connected to the nozzle 32.

[0076] As described above, the mixing device 10 and the nozzle 32 can be connected, and the mixed slurry mixed in the mixing device 10 can enter the nozzle 32.

[0077] In some embodiments, the driving member 31 controls the spray head 32 to rotate.

[0078] By controlling the rotation of the nozzle 32, the mixed slurry in the nozzle 32 can be thrown out to the surroundings due to the centrifugal force. Among them, the driving member 31 can also control the rotation speed of the nozzle 32. For example, when the flow rate of the mixed slurry is large, the rotation speed of the nozzle 32 is controlled to be large, and when the flow rate of the mixed slurry is small, the rotation speed of the nozzle 32 is controlled to be small, so that the mixed slurry can be well dispersed and thrown out in different situations. In some other embodiments, the driving member 31 can also control the reciprocating motion of the nozzle 32. When the nozzle 32 reciprocates, the mixed slurry in the nozzle 32 can also be thrown out in the form of droplets. Among them, the driving member 31 can also control the reciprocating speed of the nozzle 32. For example, when the flow rate of the mixed slurry is large, the reciprocating speed of the nozzle 32 is controlled to be large. When the flow rate of the mixed slurry is small, the reciprocating speed of the nozzle 32 is controlled to be small.

[0079] In the above-mentioned rotating motion mode, the mixed slurry is thrown out and spread around under the action of centrifugal force, and the mixed slurry has better dispersibility. In addition, the driving member 31 can also control the rotation speed of the nozzle 32 to meet different usage requirements.

[0080] In some embodiments, the magnetic adsorption device 40 includes: a second shell 41 having a second cavity 413 , the nozzle 32 is located in the second cavity 413 , and an electromagnetic component 42 , the electromagnetic component 42 is disposed in the second cavity 413 , and the electromagnetic component 42 is disposed below the nozzle 32 .

[0081] The second shell 41 can be specifically in the form of a rectangle, a cylinder, an irregular polygon, etc. In the present embodiment, the second shell 41 is in the form of a cylinder. In addition, the second shell 41 also has an opening, through which the mixing liquid tube 20 passes. One end of the mixing liquid tube 20 is connected to the nozzle 32 in the second cavity 413, and the other end of the mixing liquid tube 20 is connected to the mixed slurry outlet of the first shell 11. Among them, the electromagnetic component 42 has magnetic attraction when it is powered on, and does not have magnetic attraction when it is powered off. When the demagnetization device 100 is demagnetized, the electromagnetic component 42 is first powered on to make the electromagnetic component 42 magnetic. After the nozzle 32 throws out the mixed slurry and it falls on the electromagnetic component 42, and the magnetic metal particles are separated from the positive electrode material, the power can be turned off to collect the magnetic metal particles on the electromagnetic component 42.

[0082] As described above, the nozzle 32 is located in the second cavity 413, so that the mixed slurry thrown out by the nozzle 32 can be fully collected. The nozzle 32 and the electromagnetic member 42 are both located in the second cavity 413, so that the mixed slurry thrown out by the nozzle 32 can better fall on the electromagnetic member 42. The electromagnetic member 42 has magnetic attraction when it is powered on, and does not have magnetic attraction when it is powered off, which facilitates the collection of magnetic metal particles.

[0083] In some embodiments, the first shell 11 further includes a fixing member 113 , and the first shell 11 is fixed to the second shell 41 via the fixing member 113 .

[0084] The number of the fixing members 113 may be one or more, and the fixing members 113 may be rod-shaped, sheet-shaped, or block-shaped, etc. The fixing members 113 may be fixed to the second shell 41 by bolts, latches, welding, etc. In this embodiment, the fixing members 113 are rod-shaped, and the number of the fixing members 113 is three, and the three fixing members 113 are not collinear. One end of the fixing member 113 is fixed to the bottom of the first shell 11, and the other end of the fixing member 113 is fixed to the top of the second shell 41, so that the first shell 11 is located above the second shell 41, so as to facilitate the mixed slurry in the mixing device 10 to flow into the nozzle 32 under the action of gravity.

[0085] The above structure enables the first housing 11 to be fixed on the second housing 41, so that the structural stability of the demagnetization device 100 is better. In addition, the structural integrity of the demagnetization device 100 is improved, and the space occupied by the demagnetization device 100 is reduced.

[0086] In some embodiments, the electromagnetic member 42 is a hollow structure.

[0087] The electromagnetic member 42 is provided with a through hole (not shown), which extends in the vertical direction. The number of through holes can be one or more. In the present embodiment, the number of through holes is multiple, and the multiple through holes are arranged at intervals. This arrangement allows the mixed slurry thrown out by the nozzle 32 to fall on the electromagnetic member 42. After the magnetic metal particles in the positive electrode material are adsorbed by the electromagnetic member 42, the remaining positive electrode material and water can fall through the through holes on the electromagnetic member 42, which facilitates the separation of the magnetic metal particles in the positive electrode material.

[0088] As described above, after the magnetic metal particles in the mixed slurry are adsorbed by the electromagnetic component 42 , the remaining positive electrode material and water can easily fall through the hollow structure of the electromagnetic component 42 .

[0089] In some embodiments, the electromagnetic member 42 includes a plurality of spliced ​​magnetic strips (not shown), through holes extending in a vertical direction are provided between the magnetic strips, and the spacing between the magnetic strips is adjustable.

[0090] The magnetic strips can be spliced ​​together through the magnetic adsorption of the magnetic strips themselves, or the magnetic strips can be spliced ​​together through a clamping structure. The magnetic strips can be spliced ​​together. When the flow rate of the mixed slurry is large, more magnetic strips can be spliced ​​together so that the electromagnetic component 42 provides a stronger magnetic field strength. When the flow rate of the mixed slurry is small, fewer magnetic strips can be spliced ​​together so that the electromagnetic component 42 provides a smaller magnetic field strength.

[0091] As mentioned above, the electromagnetic components 42 can be spliced ​​so that the electromagnetic components 42 can provide different magnetic field strengths to meet different usage requirements.

[0092] In some embodiments, in the horizontal direction, the electromagnetic member 42 and the second cavity 413 have the same shape and size.

[0093] The electromagnetic member 42 and the second cavity 413 are both cylindrical, and the cross-sectional diameter of the electromagnetic member 42 is equal to the cross-sectional diameter of the second cavity 413. This allows the mixed slurry ejected from the nozzle 32 to fall on the electromagnetic member 42. In addition, in other embodiments, the electromagnetic member 42 and the second cavity 413 can also be rectangular, polygonal, etc.

[0094] As described above, the thrown mixed slurry can fall onto the electromagnetic member 42 more fully.

[0095] In some embodiments, the second shell 41 has a discharge port 414 at the bottom.

[0096] The number of the discharge port 414 may be one or more. The discharge port 414 is used to discharge the mixed slurry or the adsorbed magnetic metal particles in the second cavity 413 .

[0097] In some embodiments, the mixing pipe 20 and / or the discharge port 414 is provided with a switch device 60 .

[0098] In this embodiment, the mixing tube 20 and the discharge port 414 are both provided with a switch device 60. The switch device 60 is used to control the conduction and shutoff of the mixing tube 20 and the discharge port 414, wherein the switch device 60 may specifically be a butterfly valve, a solenoid valve, a ball valve, a throttle valve, etc. In a specific application scenario, when demagnetizing the positive electrode material, the switch device 60 of the mixing tube 20 and the switch device 60 of the discharge port 414 are first closed, and then the positive electrode material and water are injected into the first cavity 111 of the mixing device 10 through the feed port 112, and then the movement speed and movement time of the stirring element 13 are controlled by the power device 12, so that the stirring element 13 fully stirs and mixes the positive electrode material and water. Then, the switch device 60 of the mixing tube 20 is controlled to open, and the nozzle 32 is controlled to rotate by the driving element 31, and the electromagnetic element 42 is energized, so that the mixed slurry is diffused in a mist state and thrown out and falls on the magnetic adsorption device 40. Then, the switch device 60 of the discharge port 414 is opened to collect the demagnetized positive electrode material and water through the discharge port 414. After the demagnetized positive electrode material and water are collected, the electromagnetic component 42 is powered off to collect the magnetic metal particles.

[0099] As described above, the positive electrode material and water can be fully mixed in the first cavity 111 and then thrown out through the nozzle 32. The switch device 60 can also control the flow rate of the mixed slurry flowing through the mixed slurry and control the material to flow out from the bottom of the second shell 41.

[0100] In some embodiments, the magnetic adsorption device 40 further includes: a power supply device 43, the power supply device 43 is connected to the electromagnetic member 42, and the power supply device 43 provides an adjustable current.

[0101] The larger the current flowing through the electromagnetic element 42, the stronger its magnetic attraction, and the smaller the current flowing through the electromagnetic element 42, the weaker its magnetic attraction. The magnitude of the current flowing through the electromagnetic element 42 can be adjusted by the power supply device 43 according to the total amount of positive electrode material to be demagnetized, so that the electromagnetic element 42 has a suitable magnetic attraction to meet the use requirements. In addition, the power supply device 43 provides a current of a stable magnitude, which can improve the accuracy of demagnetization and magnetic metal particle determination.

[0102] In a preferred embodiment, the power supply device 43 increases the current supplied to the electromagnetic member 42 so that the magnetic field strength of the electromagnetic member 42 is greater than or equal to 1 Tesla, so that the electromagnetic member 42 has a sufficiently strong magnetic attraction to absorb the magnetic metal particles.

[0103] By providing the power supply device 43 as described above, a current with a stable and adjustable magnitude can be provided to the electromagnetic element 42, so as to meet different usage requirements and improve the accuracy of the measurement of magnetic metal particles.

[0104] In some embodiments, the magnetic adsorption device 40 is provided with a heating device.

[0105] The heating device may be a resistive heater or a heat exchange heater, etc. The heating device is used to dry the magnetic metal particles before collecting the magnetic metal particles on the magnetic adsorption device 40 .

[0106] As mentioned above, the magnetic metal particles adsorbed on the electromagnetic member 42 can be dried by the heating device.

[0107] In some embodiments, the second shell 41 includes an inner shell wall 411 and an outer shell wall 412, a cavity (not marked) is formed between the inner shell wall 411 and the outer shell wall 412, and a heat conducting medium inlet 417 and a heat conducting medium outlet 418 are also provided on the second shell 41, and the heat conducting medium inlet 417 and the heat conducting medium outlet 418 are both connected to the cavity.

[0108] The second shell 41 is a double-layer cavity structure, and the heat-conducting medium can flow in the cavity of the second shell 41 to exchange heat with the gas in the second cavity 413, thereby drying the magnetic metal particles. In some embodiments, the inner shell wall 411 of the second shell 41 is preferably a metal material or a ceramic material with good thermal conductivity, and the outer shell wall 412 of the second shell 41 is a heat-insulating material to improve the heating effect of the heating device. The number of the heat-conducting medium inlet 417 is one or more, and the number of the heat-conducting medium outlet 418 is one or more.

[0109] The above structure can dry the magnetic metal particles more quickly.

[0110] In some embodiments, the second housing 41 is provided with one or more air inlets 415. The second housing 41 is provided with one or more air vents 416, and the air vents 416 are provided with filters (not shown).

[0111] The air inlet 415 is used to blow off the magnetic metal particles attached to the electromagnetic part 42 after drying the magnetic metal particles and turning off the power to the electromagnetic part 42, so as to reduce the residual magnetic metal particles. Among them, the air vent 416 is used to balance the pressure in the second cavity 413, and the filter is used to prevent the magnetic metal particles from floating out of the air vent 416 when blowing in air. In some embodiments, each air inlet 415 is also provided with a cover and a filter that can be opened and closed.

[0112] The air inlet 415 is provided to blow air into the second cavity 413 to blow off the magnetic metal particles attached to the electromagnetic component 42 .

[0113] In some embodiments, the top surface, the bottom surface and the side surfaces of the second shell 41 are all provided with air inlets 415 .

[0114] There may be one or more air inlets 415 on the top surface, one or more air inlets 415 on the bottom surface, and one or more air inlets 415 on the side. The air inlets 415 are arranged at multiple angles to perform forward and reverse blowing on the magnetic metal particles attached to the electromagnetic member 42, thereby improving the efficiency of blowing off the magnetic metal particles.

[0115] By arranging the air inlets 415 on multiple surfaces, air can be blown into the second cavity 413 from multiple angles, so that the magnetic metal particles attached to the electromagnetic component can be blown off better.

[0116] In some embodiments, the bottom surface of the second shell 41 is recessed outward to form a groove (not shown), and the discharge port 414 is located at the bottom of the groove.

[0117] The above arrangement can prevent the positive electrode material or the magnetic metal particles from accumulating at the bottom of the second cavity 413, thereby improving the accuracy of the measurement of the magnetic metal particles.

[0118] In some embodiments, a weighing device 50 is disposed on the magnetic adsorption device 40 .

[0119] The weighing device 50 can be specifically a weight sensor, which can be arranged on the shell wall 412 at the bottom of the second shell 41. By recording the change in the reading of the weight sensor before and after demagnetization, the collection of magnetic metal particles adsorbed on the electromagnetic member 42 can be determined, thereby improving the accuracy of the measurement of magnetic metal particles. In some preferred embodiments, the electromagnetic member 42 and the weighing device 50 are regularly calibrated to improve the accuracy of the measurement. Preferably, the electromagnetic member 42 is calibrated once every 24 hours, and the weighing device 50 is calibrated once a week.

[0120] As described above, the collection status of the magnetic metal particles on the magnetic adsorption device 40 can be determined by the weighing device 50 .

[0121] In some embodiments, the second housing 41 of the magnetic adsorption device 40 is further provided with an observation port 70, and a detachable cover is provided on the observation port 70, so that the administrator can check whether there is any residual material in the second cavity 413 through the observation port 70, and it is convenient to clean the inside of the second cavity 413. In addition, the observation port 70 can be provided on the top surface or side surface of the second housing 41, and the cover is preferably made of a transparent material.

[0122] The present application also provides a demagnetization detection system, which includes a demagnetization device 100. The demagnetization device 100 in this embodiment is the demagnetization device 100 described in the above embodiment, and will not be described in detail here.

[0123] The demagnetization device 100 of the present application includes a mixing device 10, a spray device 30 and a magnetic adsorption device 40. The mixing device 10 is used to mix positive electrode materials and water, and the mixing device 10 has a mixed slurry outlet. The spray device 30 includes a driving member 31 and a nozzle 32, and the nozzle 32 is connected to the mixed slurry outlet; the driving member 31 is connected to the nozzle 32, and the driving member 31 controls the rotation of the nozzle 32 so that the nozzle 32 throws out the mixed slurry in a mist state, and the magnetic adsorption device 40 is arranged below the nozzle 32. The mixing device 10 includes: a first shell 11, the first shell 11 has a first cavity 111, and the first shell 11 has two feed ports 112; a power device 12; a stirring member 13 is arranged in the first cavity 111, and the power device 12 is connected to the stirring member 13, and the power device 12 controls the rotation of the stirring member 13. The magnetic adsorption device 40 includes: a second shell 41, the second shell 41 has a second cavity 413, and the nozzle 32 is located in the second cavity 413; the electromagnetic component 42 is arranged in the second cavity 413, and the electromagnetic component 42 is arranged below the nozzle 32. The electromagnetic component 42 includes a plurality of spliced ​​magnetic strips, and there are through holes extending in the vertical direction between the magnetic strips, and the spacing between the magnetic strips is adjustable. The bottom of the second shell 41 has a discharge port 414. The mixing tube 20 and the discharge port 414 are provided with butterfly valves. The magnetic adsorption device 40 also includes a power supply device 43, which is connected to the electromagnetic component 42, and the power supply device 43 provides an adjustable current. The top surface, bottom surface and side surface of the second shell 41 are all provided with a blowing air inlet 415. The second housing 41 includes an inner housing wall 411 and an outer housing wall 412, a cavity is formed between the inner housing wall 411 and the outer housing wall 412, and a heat transfer medium inlet 417 and a heat transfer medium outlet 418 are provided on the second housing 41, and the heat transfer medium inlet 417 and the heat transfer medium outlet 418 are both connected to the cavity. A weighing device 50 is provided on the magnetic adsorption device 40.

[0124] In the above manner, the positive electrode material and water are first mixed through the mixing device 10, and the obtained mixed slurry is thrown out through the moving nozzle 32. The thrown mixed slurry is in the form of droplets and has good dispersion. It can evenly fall on the magnetic adsorption device 40 below, so that the positive electrode material in the mixed slurry is in contact with the magnetic adsorption device 40 more fully, which can improve the adsorption effect of the magnetic adsorption device 40 on the magnetic metal particles in the positive electrode material, improve the demagnetization effect, and the demagnetization operation is simple.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A demagnetization device, characterized in that: The demagnetization equipment comprises: A mixing device, the mixing device is used to mix the positive electrode material and water, the mixing device has a mixed slurry outlet; A spray device, the spray device comprising a driving member and a spray head, the spray head being connected to the mixed slurry outlet; the driving member being connected to the spray head, the driving member controlling the movement of the spray head so that the spray head throws out the mixed slurry in a mist-like diffusion state; A magnetic adsorption device, wherein the magnetic adsorption device comprises an electromagnetic component, the electromagnetic component is a hollow structure, and the magnetic adsorption device is arranged below the nozzle.

2. The demagnetization device according to claim 1, characterized in that: The mixing device comprises: A first shell, wherein the first shell has a first cavity, and the first shell has one or more inlets; Power plant; A stirring member is disposed in the first cavity, the power device is connected to the stirring member, and the power device controls the movement of the stirring member.

3. The demagnetization device according to claim 2, characterized in that: The power device controls the stirring element to rotate.

4. The demagnetization device according to claim 3, characterized in that: The nozzle is connected to the mixed slurry outlet through a mixing liquid pipe.

5. The demagnetization device according to claim 4, characterized in that: The driving member controls the nozzle to rotate.

6. The demagnetization device according to claim 4, characterized in that: The driving member controls the reciprocating motion of the spray head.

7. The demagnetization device according to claim 4, characterized in that: The magnetic adsorption device comprises: The second shell has a second cavity, and the nozzle is located in the second cavity; the electromagnetic component is arranged in the second cavity, and the electromagnetic component is arranged below the nozzle.

8. The demagnetization device according to claim 7, characterized in that: The first shell further includes a fixing member, and the first shell is fixed to the second shell through the fixing member.

9. The demagnetization device according to claim 7, characterized in that: The electromagnetic component comprises a plurality of spliced ​​magnetic strips, through holes extending in a vertical direction are provided between the magnetic strips, and the spacing between the magnetic strips is adjustable.

10. The demagnetization device according to claim 7, characterized in that: In the horizontal direction, the electromagnetic component and the second cavity are identical in shape and size.

11. The demagnetization device according to claim 10, characterized in that: The bottom of the second shell is provided with a discharge port.

12. The demagnetization device according to claim 11, characterized in that: The mixing liquid pipe and / or the discharge port are provided with a switch device.

13. The demagnetization device according to claim 12, characterized in that: The magnetic adsorption device also includes: A power supply device is connected to the electromagnetic component, and provides an electric current with an adjustable magnitude.

14. The demagnetization device according to claim 13, characterized in that: The second housing is provided with one or more air inlets; The second shell is provided with one or more air holes, and the air holes are provided with filters.

15. The demagnetization device according to claim 14, characterized in that: The top surface, the bottom surface and the side surface of the second shell are all provided with the air inlet.

16. The demagnetization device according to claim 15, characterized in that: The magnetic adsorption device is provided with a heating device.

17. The demagnetization device according to claim 16, characterized in that: The second shell includes an inner shell wall and an outer shell wall, a cavity is formed between the inner shell wall and the outer shell wall, and a heat transfer medium inlet and a heat transfer medium outlet are also provided on the second shell, and the heat transfer medium inlet and the heat transfer medium outlet are both connected to the cavity.

18. The demagnetization device according to claim 17, characterized in that: The bottom surface of the second shell is sunken outward to form a groove, and the discharge port is located at the bottom of the groove.

19. The demagnetization device according to claim 18, characterized in that: The second shell is provided with an observation port, and the observation port is provided with a detachable cover.

20. The demagnetization device according to claim 19, characterized in that: A weighing device is arranged on the magnetic adsorption device.

21. A demagnetization detection system, characterized in that: The demagnetization detection system comprises the demagnetization equipment described in any one of claims 1-20.

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