Demagnetizing device and battery production equipment

Abstract

The utility model relates to a demagnetizing device and battery production equipment, and the demagnetizing device comprises an adsorption part which is arranged in a manner of lengthwise extension along a first direction and is used for adsorbing magnetic metal particles in slurry; the first electrode and the second electrode are opposite in polarity, and the first electrode is arranged on the periphery of the adsorption part in a surrounding mode; the second electrodes are arranged on the periphery of the first electrode at intervals, the second electrodes and the first electrode jointly form a flow channel for slurry to flow, and the flow channel is arranged in a lengthwise extending mode in the first direction. The magnetic metal particles in the slurry can be adsorbed by the adsorption part, so that demagnetization treatment on the slurry is realized; besides, the first electrode and the second electrode can be externally connected with a power supply, the potential rises after the first electrode and the second electrode are electrified, and when the potential reaches a metal oxidation potential, the magnetic metal particles attached to the first electrode are electrolyzed and ionized, so that the magnetic metal particles can be removed, the demagnetizing device can be cleaned more efficiently and conveniently, the operation is convenient, and the efficiency is high.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a demagnetization device and a battery production equipment. Background Art

[0002] During the production process of battery cells, the stability and uniformity of the slurry are important factors affecting the performance of battery cells. The slurry usually contains magnetic metal particles such as ferromagnetic impurities, and the magnetic metal particles will have a great impact on the discharge and safety performance of battery cells. Therefore, before coating the slurry, it is necessary to perform demagnetization treatment on the slurry to remove the magnetic metal particles in the slurry.

[0003] However, during the process of demagnetizing the slurry by the current demagnetization device, the operation is relatively complex and the efficiency is low. Summary of the Utility Model

[0004] Based on this, in view of the problem that the operation of the current demagnetization device for demagnetizing the slurry is relatively complex and the efficiency is low, it is necessary to provide a demagnetization device and a battery production equipment.

[0005] In a first aspect, the present application provides a demagnetization device for demagnetizing and electrolyzing a slurry. The demagnetization device includes an adsorbent, a first electrode and a second electrode with opposite polarities. The adsorbent extends longitudinally along a first direction and is used for adsorbing magnetic metal particles in the slurry; the first electrode is disposed around the outer periphery of the adsorbent; the second electrode is disposed around the outer periphery of the first electrode at intervals and together with the first electrode forms a flow channel for the slurry to flow through, and the flow channel extends longitudinally along the first direction.

[0006] With the above structure, when the slurry flows in the flow channel between the first electrode and the second electrode, the adsorbent can adsorb the magnetic metal particles in the slurry, so that the magnetic metal particles adhere to the surface of the first electrode facing the inside of the flow channel, realizing the demagnetization treatment of the slurry. In addition, after the adsorption of the magnetic metal particles is completed, the first electrode and the second electrode can be externally connected to a power supply. After being energized, the potential increases. When the potential reaches the metal oxidation potential, the magnetic metal particles attached to the first electrode are electrolyzed and ionized, so that the removal of the magnetic metal particles can be realized, and the cleaning of the demagnetization device can be realized more efficiently and conveniently, which is easy to operate and has high efficiency.

[0007] In some embodiments, the ratio range of the inner diameter of the first electrode to the inner diameter of the second electrode is 1:1.3 - 1:3.8.

[0008] Thus, by setting the ratio of the inner diameter of the first electrode to the inner diameter of the second electrode within the above range, the flow rate of the slurry in the flow channel and the demagnetization effect of the slurry can be taken into account.

[0009] In some embodiments, the ratio range between the inner diameter of the first electrode and the inner diameter of the second electrode is from 1:1.6 to 1:3.

[0010] Thus, by setting the ratio between the inner diameter of the first electrode and the inner diameter of the second electrode within the above range, on the basis of taking into account the flow rate of the slurry in the flow channel, the demagnetization effect of the slurry can be further improved.

[0011] In some embodiments, in a second direction intersecting the first direction, the wall thickness of the first electrode is equal to the wall thickness of the second electrode.

[0012] With the above structure, the pressure exerted by the slurry in the flow channel on the pipe walls of the first electrode and the second electrode is more balanced, making the distribution of magnetic metal particles in the slurry more uniform and facilitating more thorough adsorption of the magnetic metal particles.

[0013] In some embodiments, in the second direction, the ratio range between the wall thickness of the first electrode and / or the second electrode and the width of the flow channel is from 1:1.6 to 1:14.

[0014] Based on this, by setting the ratio between the wall thickness of the first electrode and / or the second electrode and the width of the flow channel within the above range, on the one hand, the adsorption effect of the adsorbent on the magnetic metal particles in the flow channel can be improved, and on the other hand, the current density on the first electrode and the second electrode can be increased as much as possible, thereby improving the electrolysis effect.

[0015] In some embodiments, in the second direction, the ratio range between the wall thickness of the first electrode and / or the second electrode and the width of the flow channel is from 1:3 to 1:8.

[0016] Thus, by setting the ratio between the wall thickness of the first electrode and / or the second electrode and the width of the flow channel within the above range, the adsorption effect of the magnetic metal particles and the electrolysis effect can be further improved.

[0017] In some embodiments, the materials of both the first electrode and the second electrode are conductive materials.

[0018] Thus, by using conductive materials for the first electrode and the second electrode, after demagnetization is completed, the first electrode and the second electrode can be smoothly connected to an external power source to electrolyze the magnetic metal particles adsorbed on the surface of the first electrode, ionize the magnetic metal particles, and thus the magnetic metal particles can be cleaned and removed.

[0019] In some embodiments, the demagnetization device further includes a flow disturbing member disposed in the flow channel for disturbing the slurry in the flow channel.

[0020] By setting the spoiler, the flow velocity of the slurry in the flow channel can be reduced, and the contact time between the slurry and the adsorbent can be increased, enabling the adsorbent to more thoroughly adsorb the magnetic metal particles in the slurry. In addition, the spoiler can also cause turbulence in the slurry and agitate the magnetic metal particles in the slurry to increase the probability that the magnetic metal particles in the slurry are adsorbed and captured by the adsorbent, thereby improving the demagnetization efficiency.

[0021] In some embodiments, the spoiler protrudes from the surface of the first electrode facing the flow channel; and / or, the spoiler protrudes from the surface of the second electrode facing the flow channel.

[0022] Thus, protruding the spoiler on the first electrode and / or the second electrode can not only cause turbulence in the slurry but also increase the adsorption area of the magnetic metal particles in the slurry, thereby improving the demagnetization effect.

[0023] In some embodiments, the spoiler extends spirally along a first direction.

[0024] In this way, the slurry can flow in a spiral path in the flow channel along the first direction under the guiding action of the spoiler, which can not only increase the contact area and contact time between the slurry and the adsorbent but also further cause turbulence in the flow of the slurry, thereby increasing the probability that the magnetic metal particles in the slurry are adsorbed and captured by the adsorbent and further improving the demagnetization efficiency.

[0025] In a second aspect, the present application also provides a battery production device, including a power source and the demagnetization device as described above, and the first electrode and the second electrode are respectively used for electrically connecting to the positive electrode and the negative electrode of the power source.

[0026] In the above-mentioned demagnetization device and battery production device, when the slurry flows in the flow channel between the first electrode and the second electrode, the adsorbent can adsorb the magnetic metal particles in the slurry, causing the magnetic metal particles to adhere to the surface of the first electrode facing the inside of the flow channel, thereby achieving the demagnetization treatment of the slurry; in addition, after the adsorption of the magnetic metal particles is completed, the first electrode and the second electrode can be externally connected to a power source, and the potential increases after being energized. When the potential reaches the metal oxidation potential, the magnetic metal particles adhering to the first electrode are electrolyzed and ionized, thereby enabling the removal of the magnetic metal particles, more efficiently and conveniently realizing the cleaning of the demagnetization device, being easy to operate and having high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of a demagnetization device according to one or more embodiments.

[0028] Figure 2 It is a cross-sectional view of a demagnetization device according to one or more embodiments.

[0029] Figure 3Schematic structural diagram of a first electrode and a spoiler in a demagnetizing device according to one or more embodiments.

[0030] Description of reference numerals: 100, demagnetizing device; 10, adsorbent; 20, first electrode; 30, second electrode; 40, flow channel; 50, spoiler; a, first direction; b, second direction. Detailed implementation manners

[0031] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application 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 should not be construed as a limitation of the present application.

[0033] In addition, if terms such as "first" and "second" appear, these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0034] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "connect", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] In this application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0037] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only applied to energy storage power systems such as hydraulic, thermal, wind and solar power stations, but also widely applied to electric transportation tools such as electric bicycles, electric motorcycles, electric vehicles and other fields. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0038] A battery is composed of one or more battery cells. For each battery, the multiple battery cells that make it up can be connected in series, in parallel or in a series-parallel combination. Among them, a series-parallel combination means that there are both series and parallel connections among multiple battery cells.

[0039] A battery cell is the smallest unit that makes up a battery. In the structure of a battery cell, it includes a housing, an electrolyte and an electrode assembly. The electrode assembly is the component in the battery cell where an electrochemical reaction occurs. The electrode assembly includes a positive electrode plate, a negative electrode plate and a separator. Both the positive electrode plate and the negative electrode plate are formed by coating a slurry on a substrate. By coating the slurry, the electrode assembly can smoothly undergo an electrochemical reaction.

[0040] However, the slurry usually contains a large amount of magnetic metal particles, such as ferromagnetic impurities or other magnetic metal particles. When the slurry is coated on the substrate and assembled to form an electrode assembly, the magnetic metal particles in the slurry will have a great impact on the discharge and safety performance of the electrode assembly or the battery cell, affecting the use performance of the battery.

[0041] Based on this, it is necessary to demagnetize the slurry before coating the slurry to remove the magnetic metal particles in the slurry.

[0042] Currently, after the slurry is demagnetized, the magnetic metal particles are adsorbed inside the demagnetization device, and then it is necessary to manually clean and remove the magnetic metal particles. The operation process is very complicated, resulting in low production efficiency.

[0043] Based on the above considerations, in order to solve the problems of relatively complicated operation and low efficiency in the process of demagnetizing the slurry by the current demagnetization device, one or more embodiments of the present application provide a demagnetization device. When the slurry flows in the flow channel between the first electrode and the second electrode, the adsorbing member can adsorb the magnetic metal particles in the slurry, so that the magnetic metal particles adhere to the surface of the first electrode facing the inside of the flow channel, realizing the demagnetization of the slurry. In addition, after the adsorption of the magnetic metal particles is completed, the first electrode and the second electrode can be externally connected to a power supply. After being energized, the potential increases. When the potential reaches the metal oxidation potential, the magnetic metal particles attached to the first electrode are electrolyzed and ionized, so that the removal of the magnetic metal particles can be realized, and the cleaning of the demagnetization device can be realized more efficiently and conveniently, which is easy to operate and has high efficiency.

[0044] Please refer to Figure 1 、 Figure 2 and Figure 3 At the same time, an embodiment of the present application provides a demagnetization device 100 for demagnetizing and electrolyzing the slurry. The demagnetization device 100 includes an adsorbing member 10, a first electrode 20 and a second electrode 30 with opposite polarities. Among them, the adsorbing member 10 extends longitudinally along the first direction a and is used to adsorb the magnetic metal particles in the slurry. The first electrode 20 surrounds the outer periphery of the adsorbing member 10; the second electrode 30 is disposed at an interval outside the first electrode 20 and forms a flow channel 40 for the slurry to flow together with the first electrode 20, and the flow channel 40 extends longitudinally along the first direction a.

[0045] It should be noted that the demagnetization device 100 refers to a device that can demagnetize the slurry of the battery to remove the magnetic metal particles in the slurry. The demagnetization device 100 includes an adsorbing member 10, a first electrode 20 and a second electrode 30. Among them, the adsorbing member 10 refers to a component that can adsorb the magnetic metal particles in the slurry. The adsorbing member 10 can be, but is not limited to, a magnetic member or a magnetizable metal structure. As a specific embodiment, the adsorbing member 10 can be set as a magnetic rod.

[0046] The polarities of the first electrode 20 and the second electrode 30 are opposite. When the first electrode 20 is set to the positive electrode, the second electrode 30 is the negative electrode. Conversely, when the first electrode 20 is set to the negative electrode, the second electrode 30 is the positive electrode. For ease of understanding, the following description will be based on the first electrode 20 being the positive electrode and the second electrode 30 being the negative electrode.

[0047] The first electrode 20 is arranged around the outer periphery of the adsorbent 10. When the magnetic bar is arranged as a cylindrical structure, the first electrode 20 is also arranged as a cylindrical structure and is arranged around the outer periphery of the magnetic bar. The two are arranged coaxially. At the same time, the second electrode 30 can also be arranged as a cylindrical structure and is arranged at a distance from the first electrode 20.

[0048] It is understandable that the magnetic bar can also be set to other shapes, such as a cube shape, etc. The shapes of the first electrode 20 and the second electrode 30 can be adjusted accordingly to match each other, which will not be elaborated here.

[0049] The first direction a may be set as the axial direction of the adsorption member 10 , the first electrode 20 and the second electrode 30 .

[0050] The first electrode 20 is sleeved on the outer circumference of the magnetic rod, and the second electrode 30 is radially spaced around the outer circumference of the first electrode 20 . In this way, a flow channel 40 can be formed between the first electrode 20 and the second electrode 30 .

[0051] The flow channel 40 extends along the first direction a, and one end is formed as an inlet, and the other end is formed as an outlet. The slurry enters the flow channel 40 from the inlet, flows inside the flow channel 40 along the first direction a, and finally flows out from the outlet.

[0052] In the above process, the adsorbent 10 can adsorb the magnetic metal particles in the slurry, so that the magnetic metal particles adhere to the surface of the first electrode 20 on the side away from the magnetic rod.

[0053] After the slurry is demagnetized, the first electrode 20 and the second electrode 30 can be electrically connected to the positive and negative electrodes of the external power supply respectively. After power is turned on, the potential increases. When the potential reaches the metal oxidation potential, the magnetic metal particles attached to the first electrode 20 are electrolyzed and ionized. After the magnetic metal particles are ionized, they can react in the slurry, and after the reaction, a substance with no risk of self-discharge can be formed, so that the K value will not be abnormal. The K value refers to the voltage drop of the lithium-ion battery cell per unit time.

[0054] In addition, the first electrode 20 can be attached to the outer circumference of the magnetic rod, or a certain gap can be formed between the first electrode 20 and the magnetic rod. Specifically, the distance between the first electrode 20 and the adsorbent 10 can range from 0 to 5 mm.

[0055] Understandably, the distance between the first electrode 20 and the magnetic rod affects the adsorption effect of the magnetic rod on the magnetic metal particles in the flow channel 40.

[0056] With the above structure, when the slurry flows in the flow channel 40 between the first electrode 20 and the second electrode 30, the adsorbent 10 can adsorb the magnetic metal particles in the slurry, causing the magnetic metal particles to adhere to the surface of the first electrode 20 facing the inside of the flow channel 40, achieving demagnetization treatment of the slurry. In addition, after the adsorption of the magnetic metal particles is completed, the first electrode 20 and the second electrode 30 can be externally connected to a power source. After being energized, the potential increases. When the potential reaches the metal oxidation potential, the magnetic metal particles attached to the first electrode 20 are electrolyzed and ionized, so that the removal of the magnetic metal particles can be realized, and the cleaning of the demagnetization device 100 can be achieved more efficiently and conveniently, which is easy to operate and has high efficiency.

[0057] In some embodiments, the ratio range between the inner diameter D1 of the first electrode 20 and the inner diameter D2 of the second electrode 30 is 1:1.3 - 1:3.8.

[0058] Understandably, the ratio between the inner diameter of the first electrode 20 and the inner diameter of the second electrode 30 can be but is not limited to being set as 1:1.3, 1:1.8, 1:2.3, 1:2.8, 1:3.3, 1:3.8.

[0059] Specifically, the ratio between the inner diameter of the first electrode 20 and the inner diameter of the second electrode 30 will affect the width of the formed flow channel 40, and the width of the flow channel 40 will in turn affect the flow rate of the slurry in the flow channel 40 and the demagnetization effect of the slurry.

[0060] Among them, the larger the width of the flow channel 40, the more slurry can be accommodated in the flow channel 40, and the faster the flow rate of the slurry. This will result in higher production efficiency, but the slurry stays in the flow channel 40 for a shorter time, so the demagnetization effect is poor. On the contrary, the smaller the width of the flow channel 40, the less slurry can be accommodated in the flow channel 40. Although the flow rate of the slurry is slower, the slurry can fully contact the adsorbent 10 in the flow channel 40, resulting in a better demagnetization effect.

[0061] Therefore, setting the ratio between the inner diameter of the first electrode 20 and the inner diameter of the second electrode 30 within the above range can take into account both the flow rate of the slurry in the flow channel 40 and the demagnetization effect of the slurry.

[0062] In some embodiments, the ratio range between the inner diameter D1 of the first electrode 20 and the inner diameter D2 of the second electrode 30 is 1:1.6 - 1:3.

[0063] Specifically, the ratio between the inner diameter of the first electrode 20 and the inner diameter of the second electrode 30 can be, but is not limited to, set to 1:1.6, 1:2, 1:2.6, 1:3.

[0064] Therefore, by setting the ratio between the inner diameter of the first electrode 20 and the inner diameter of the second electrode 30 within the above range, on the basis of taking into account the flow rate of the slurry in the flow channel 40, the demagnetization effect of the slurry can be further improved.

[0065] In some embodiments, in the second direction b intersecting the first direction a, the wall thickness of the first electrode 20 is equal to the wall thickness of the second electrode 30.

[0066] Specifically, the second direction b can be perpendicular to the first direction a, that is, the second direction b is the radial direction of the adsorbent 10, the first electrode 20, and the second electrode 30. The wall thickness of the first electrode 20 refers to the pipe thickness of the first electrode 20 in its own radial direction. The wall thickness of the second electrode 30 refers to the pipe thickness of the second electrode 30 in its own radial direction.

[0067] Since the flow channel 40 is formed by the first electrode 20 and the second electrode 30 being spaced apart, when the slurry flows in the flow channel 40, a certain pressure will be exerted on the pipe walls of the first electrode 20 and the second electrode 30. Therefore, when the wall thickness of the first electrode 20 is equal to the wall thickness of the second electrode 30, the pressures received by the two from the slurry are more balanced, making the distribution of magnetic metal particles in the slurry more uniform and facilitating more thorough adsorption of the magnetic metal particles.

[0068] Through the above structure, the pressure exerted by the slurry in the flow channel 40 on the pipe walls of the first electrode 20 and the second electrode 30 is more balanced, making the distribution of magnetic metal particles in the slurry more uniform and facilitating more thorough adsorption of the magnetic metal particles.

[0069] In some embodiments, in the second direction b, the ratio range between the wall thickness D3 of the first electrode 20 and / or the second electrode 30 and the width D4 of the flow channel 40 is 1:1.6 - 1:14.

[0070] It can be understood that in the second direction b, the ratio between the wall thickness of the first electrode 20 and / or the second electrode 30 and the width of the flow channel 40 can be, but is not limited to, set to 1:1.6, 1:2, 1:4, 1:6, 1:8, 1:10, 1:12, 1:14.

[0071] Specifically, the ratio between the wall thickness of the first electrode 20 and / or the second electrode 30 and the width of the flow channel 40 not only affects the adsorption effect of the adsorbent 10 on the magnetic metal particles in the flow channel 40, but also affects the current density flowing through the first electrode 20 and the second electrode 30 after the first electrode 20 and the second electrode 30 are energized, thereby affecting the electrolysis effect on the magnetic metal particles.

[0072] Based on this, setting the ratio between the wall thickness of the first electrode 20 and / or the second electrode 30 and the width of the flow channel 40 within the above range can, on the one hand, improve the adsorption effect of the adsorbent 10 on the magnetic metal particles in the flow channel 40, and on the other hand, can increase the current density on the first electrode 20 and the second electrode 30 as much as possible, thereby improving the electrolysis effect.

[0073] In some embodiments, in the second direction b, the ratio range between the wall thickness D3 of the first electrode 20 and / or the second electrode 30 and the width D3 of the flow channel 40 is 1:3 - 1:8.

[0074] As a specific embodiment, in the second direction b, the ratio between the wall thickness of the first electrode 20 and / or the second electrode 30 and the width of the flow channel 40 can be but is not limited to being set to 1:3, 1:4, 1:5, 1:6, 1:7, 1:8.

[0075] Under the condition that the width of the flow channel 40 is constant, the thicker the wall thickness of the electrode, the greater the current density. Therefore, setting the ratio between the wall thickness of the first electrode 20 and / or the second electrode 30 and the width of the flow channel 40 within the above range can further improve the adsorption effect of the magnetic metal particles and the electrolysis effect.

[0076] In addition, it should be noted that the length of the flow channel 40 in the first direction a will affect the residence time of the slurry in the flow channel 40, thereby affecting the adsorption effect of the magnetic metal particles. The length of the flow channel 40 in the first direction a is the length of the adsorbent 10, the first electrode 20, and the second electrode 30 in the first direction a.

[0077] As a specific embodiment, the length of the flow channel 40 in the first direction a can be set to 0.3 m to 1.5 m, and can be specifically adjusted according to actual usage requirements, which will not be elaborated here.

[0078] In some embodiments, the materials of the first electrode 20 and the second electrode 30 are both conductive materials.

[0079] As a specific embodiment, the materials of the first electrode 20 and the second electrode 30 can be but are not limited to using conductive materials such as carbon, metal, alloy, etc.

[0080] Accordingly, the first electrode 20 and the second electrode 30 are made of a conductive material. After demagnetization is completed, the first electrode 20 and the second electrode 30 can be smoothly connected to an external power supply to electrolyze the magnetic metal particles adsorbed on the surface of the first electrode 20, ionize the magnetic metal particles, and thus clean and remove the magnetic metal particles.

[0081] In some embodiments, the demagnetization device 100 further includes a flow disturbing member 50 disposed in the flow channel 40 for disturbing the slurry in the flow channel 40.

[0082] Specifically, the flow disturbing member 50 refers to a structure that can disturb the flow of the slurry in the flow channel 40 to reduce the flow velocity of the slurry in the flow channel 40.

[0083] Furthermore, the flow disturbing member 50 can be connected to the first electrode 20 or the second electrode 30 to fix the flow disturbing member 50 in the flow channel 40.

[0084] By providing the flow disturbing member 50, the flow velocity of the slurry in the flow channel 40 can be reduced, the contact time between the slurry and the adsorbent 10 can be increased, and the adsorbent 10 can more thoroughly adsorb the magnetic metal particles in the slurry. In addition, the flow disturbing member 50 can also disturb the slurry and agitate the magnetic metal particles in the slurry to increase the probability that the magnetic metal particles in the slurry are adsorbed and captured by the adsorbent 10 and improve the demagnetization efficiency.

[0085] In some embodiments, the flow disturbing member 50 protrudes from the surface of the first electrode 20 facing the flow channel 40. And / or, the flow disturbing member 50 protrudes from the surface of the second electrode 30 facing the flow channel 40.

[0086] Specifically, the flow disturbing member 50 can protrude from the surface of the first electrode 20 facing the flow channel 40, or can protrude from the surface of the second electrode 30 facing the flow channel 40. Of course, it can also be provided on the surface of the first electrode 20 facing the flow channel 40 and the surface of the second electrode 30 facing the flow channel 40 at the same time.

[0087] It can be understood that the shape of the flow disturbing member 50 can be arc-shaped, or other shapes such as rectangular or triangular.

[0088] Accordingly, by protruding the flow disturbing member 50 on the first electrode 20 and / or the second electrode 30, not only can the slurry be disturbed, but also the adsorption area of the magnetic metal particles in the slurry can be increased, thereby improving the demagnetization effect.

[0089] In some embodiments, the flow disturbing member 50 extends helically along the first direction a.

[0090] Specifically, the spoiler 50 is spirally extended along the first direction a, that is, the spoiler 50 is in a spiral structure surrounding the circumferences of the first electrode 20 and / or the second electrode 30.

[0091] In this way, the slurry can flow in a spiral path along the first direction a in the flow channel 40 under the guiding action of the spoiler 50, which can not only increase the contact area and contact time between the slurry and the adsorbent 10, but also further disturb the flow of the slurry, thereby increasing the probability that the magnetic metal particles in the slurry are adsorbed and captured by the adsorbent 10 and further improving the demagnetization efficiency.

[0092] In addition, the above-mentioned demagnetization device 100 can be applied to the current slurry system, that is, the demagnetization device 100 provided in this application is added to the end of the slurry transmission pipeline in the slurry system, and the adsorption and electrolytic removal of magnetic metal particles in the slurry can be achieved simultaneously.

[0093] Based on the same concept as the above-mentioned demagnetization device 100, this application also provides a battery production device, including a power supply and the above-mentioned demagnetization device 100, and the first electrode 20 and the second electrode 30 are used to be electrically connected to the positive and negative electrodes of the power supply respectively.

[0094] According to one or more embodiments, when this application is specifically used, the demagnetization device 100 can be installed in the slurry system, so that the slurry flows in from the inlet of the flow channel 40 and finally flows out from the outlet. During the process of flowing in the flow channel 40, the spoiler 50 can disturb the slurry, which can not only increase the contact area and contact time between the slurry and the adsorbent 10, but also make the magnetic metal particles more evenly distributed in the slurry, so as to facilitate the adsorption of the magnetic metal particles.

[0095] Further, after the adsorption is completed, the magnetic metal particles adhere to the surface of the side of the first electrode 20 facing the flow channel 40. The first electrode 20 and the second electrode 30 are respectively electrically connected to the positive and negative electrodes of an external power supply. After being energized, the potential rises. When the potential reaches the metal oxidation potential, the magnetic metal particles can be electrolyzed and ionized. After the magnetic metal particles are ionized, they can react in the slurry, and substances without the risk of self-discharge are formed after the reaction, so the K value abnormality will not be caused. Thus, the cleaning and removal of the magnetic metal particles can be achieved.

[0096] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0097] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A demagnetizing device, characterized in that For demagnetizing and electrolytically treating a slurry, the demagnetizing device includes: An adsorbent member, longitudinally extending along a first direction and configured to adsorb magnetic metal particles in the slurry; and A first electrode and a second electrode with opposite polarities, the first electrode surrounding the outer periphery of the adsorbent member; the second electrode is spaced apart from and surrounds the outer periphery of the first electrode, and together with the first electrode forms a flow channel for the slurry to flow through, and the flow channel longitudinally extends along the first direction.

2. The demagnetization device according to claim 1, characterized in that, The ratio range of the inner diameter of the first electrode to the inner diameter of the second electrode is from 1:1.3 to 1:3.

8.

3. The demagnetizing device according to claim 2, characterized in that, The ratio range of the inner diameter of the first electrode to the inner diameter of the second electrode is from 1:1.6 to 1:

3.

4. The demagnetizing device according to claim 1, characterized in that, The wall thickness of the first electrode is equal to the wall thickness of the second electrode in a second direction intersecting the first direction.

5. The demagnetizing device according to claim 4, characterized in that, In the second direction, the ratio range of the wall thickness of the first electrode and / or the second electrode to the width of the flow channel is from 1:1.6 to 1:

14.

6. The demagnetizing device according to claim 5, wherein In the second direction, the ratio range of the wall thickness of the first electrode and / or the second electrode to the width of the flow channel is from 1:3 to 1:

8.

7. The demagnetizing device according to any one of claims 1-6, characterized in that, The materials of the first electrode and the second electrode are both conductive materials.

8. The demagnetizing device according to claim 1, wherein The demagnetizing device further includes a flow disturbing member disposed in the flow channel for disturbing the slurry in the flow channel.

9. The demagnetizing device according to claim 8, characterized in that, The flow disturbing member protrudes from the surface of the first electrode facing the flow channel; and / or, the flow disturbing member protrudes from the surface of the second electrode facing the flow channel.

10. The demagnetizing device according to claim 9, characterized in that, The flow disturbing member spirally extends along the first direction.

11. A battery production device, characterized in that, Comprising a power supply and the demagnetizing device according to any one of claims 1-10, the first electrode and the second electrode are configured to be electrically connected to the positive electrode and the negative electrode of the power supply respectively.

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