Slurry demagnetizing device

Abstract

The utility model relates to the technical field of battery production, in particular to a slurry demagnetizing device, which comprises a feeding area, a discharging area and a demagnetizing area arranged between the feeding area and the discharging area, and is characterized in that the demagnetizing area comprises a charge accumulation area, a magnetic separation area and a magnetic separation area, the charge accumulation area is arranged close to the feeding area, and negative charges or positive charges are accumulated on one side in the charge accumulation area; the electric field area is arranged close to the discharging area, and an electric field is formed in the electric field area; the magnetic plate is arranged in the electric field area and provides magnetic force for the magnetic substance in the slurry in the electric field area; after the slurry enters the electric field area, magnetic substances with positive charges or negative charges in the slurry move towards the direction of the magnetic plate under the action of electric field force provided by the electric field area and are adsorbed by the magnetic plate. Through the synergistic effect of the charge accumulation region, the electric field region and the magnetic plate, efficient removal of the magnetic substances in the slurry is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, and more specifically, to a device for removing magnetism from slurry. Background Art

[0002] During the production process of secondary batteries, controlling the content of magnetic substances inside the batteries is a crucial link. This is because once the content of magnetic substances exceeds the standard, it will greatly affect the performance and safety of the batteries. Excessive magnetic substance content will not only exacerbate the self-discharge phenomenon of the batteries, but may also cause internal short circuits in the batteries. In severe cases, it may even trigger exothermic reactions and fires, posing a great threat to users.

[0003] The manufacturing process of electrodes is a combination of multiple processes, including key steps such as homogenization, coating, and rolling. In these processes, coating and rolling mainly target the surface treatment of the electrode sheets, while drying is to remove the moisture in the electrode sheets to make them reach an appropriate dryness level. However, the magnetic rods used in these processes can only adsorb the magnetic substances on the surface or attached to the surface during the processing. For those magnetic substances that have penetrated deep into the electrode sheets and are fixed during the drying process, the magnetic rods are ineffective.

[0004] The magnetic substances inside the electrode sheets are mainly removed through the homogenization section. Homogenization is the process of mixing electrode materials, binders, conductive agents, etc. into slurry. In this process, magnetic rods with high magnetic flux are installed to adsorb the magnetic substances in the slurry. However, the effect of this method is not ideal. First, although the magnetic flux of the magnetic rods is high, the contact area between the slurry and the magnetic rods is very limited, resulting in most of the magnetic substances not being effectively adsorbed. Second, even if some magnetic substances are adsorbed, they may be mixed into the slurry again during the subsequent stirring and conveying processes, greatly reducing the demagnetization effect. Therefore, in order to improve the safety of secondary batteries, there is an urgent need to design a more efficient demagnetization solution. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a device for removing magnetism from slurry, aiming to solve the problems mentioned in the background art.

[0006] To solve the above technical problems, the utility model proposes a device for removing magnetism from slurry, including: a feeding area, a discharging area, and a demagnetization area disposed between the two. Among them, the demagnetization area includes:

[0007] A charge accumulation area, disposed close to the feeding area, with negative charges or positive charges accumulated on one side inside it;

[0008] An electric field area, disposed close to the discharging area, with an electric field formed inside it;

[0009] and a magnetic plate, which is arranged in the electric field region and provides magnetic force to the magnetic substances in the slurry in the electric field region;

[0010] After the slurry enters the electric field region, the magnetic substances with positive or negative charges in it move towards the magnetic plate under the action of the electric field force provided by the electric field region and are adsorbed by the magnetic plate.

[0011] In the above technical solution, further, the charge aggregation region includes:

[0012] a first upper plate;

[0013] a first lower plate, which is arranged up and down with the first upper plate;

[0014] and a first side plate. There are two first side plates, which connect the first upper plate and the first lower plate;

[0015] Among them, one of the first upper plate, the first lower plate and the two first side plates is a conductive plate a, and the rest are insulating plates;

[0016] The conductive plate a is connected to the positive pole of the power supply a, and the negative pole of the power supply a is grounded; or the conductive plate a is connected to the negative pole of the power supply a, and the positive pole of the power supply a is grounded.

[0017] In any of the above technical solutions, further, a flat channel a is formed by enclosing the first upper plate, the first lower plate and the two first side plates, and the conductive plate a is on one side of one of the large-area ends of the flat channel a.

[0018] In any of the above technical solutions, further, the first upper plate and the first lower plate form the large-area end of the flat channel a; the two first side plates form the small-area end of the flat channel a.

[0019] In any of the above technical solutions, further, the electric field region includes:

[0020] a second upper plate;

[0021] a second lower plate, which is arranged up and down with the second upper plate;

[0022] and a second side plate. There are two second side plates, which connect the second upper plate and the second lower plate;

[0023] Among them, the second upper plate and the second lower plate are conductive plates b, and the two second side plates are insulating plates;

[0024] Or the two second side plates are conductive plates b, and the second upper plate and the second lower plate are insulating plates;

[0025] One of the conductive plates b is connected to the positive pole of the power supply b, and the other conductive plate b is connected to the negative pole of the power supply b.

[0026] In any of the above technical solutions, further, a flat channel b is formed by enclosing the second upper plate, the second lower plate and two second side plates, and the two conductive plates b are respectively on one side of two large-area ends of the flat channel b.

[0027] In any of the above technical solutions, further, the second upper plate and the second lower plate form the large-area ends of the flat channel b; the two second side plates form the small-area ends of the flat channel b.

[0028] In any of the above technical solutions, further, the magnetic plate is arranged on the second lower plate.

[0029] In any of the above technical solutions, further, the feeding area and the discharging area are respectively composed of two pipes, and the two pipes are respectively connected to the inlet end and the outlet end of the demagnetizing area.

[0030] In any of the above technical solutions, further, the two pipes are both stainless steel pipes, and the two pipes are connected to both sides of the demagnetizing area through insulating pipes.

[0031] Beneficial effects: Compared with the prior art, the demagnetizing device of the present application realizes the efficient removal of magnetic substances in the slurry through the synergistic effect of the charge accumulation area, the electric field area and the magnetic plate. Its technical effects are not only reflected in the removal rate of magnetic substances, but also reflected in the significant improvement of product quality and production efficiency. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is a schematic side view structure diagram of the present invention;

[0034] Figure 2 It is a schematic top view structure diagram of the present invention;

[0035] Figure 3 It is a schematic internal structure diagram of the charge accumulation area of the present invention;

[0036] Figure 4 It is a schematic internal structure diagram of the charge accumulation area of the present invention;

[0037] Figure 5 It is a schematic internal structure diagram of the electric field area of the present invention;

[0038] Figure 6It is a schematic diagram of the internal structure of the electric field area of the present utility model.

[0039] The description of the reference numerals in the drawings is as follows:

[0040] 10. Pipeline; 20. Insulating pipe; 100. Feeding area; 200. Demagnetization area; 210. Charge accumulation area; 211. First upper plate; 212. First lower plate; 213. First side plate; 214. Flat channel a; 220. Electric field area; 221. Second upper plate; 222. Second lower plate; 223. Second side plate; 224. Flat channel b; 230. Magnetic plate; 300. Discharging area. Specific embodiments

[0041] Next, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. It should be understood that the present application is not limited by the exemplary embodiments described herein. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0042] It should be noted that, as shown in the present application and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one" and / or "the" are not specifically singular, but may also include plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0043] If there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0044] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" 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 internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0046] The present utility model provides a slurry demagnetization device, which applies an electric field force to the magnetic substances in the slurry, and then combines magnetic force and its own gravity to remove the magnetic substances in the slurry. Compared with the traditional method of directly using a magnetic rod for demagnetization, the former not only has high efficiency but also can achieve continuous demagnetization.

[0047] The following will detail the demagnetization device of the present application through the following embodiments.

[0048] Embodiment 1:

[0049] As Figure 1 and Figure 2 shown, in this embodiment, the demagnetization device includes: a feeding area 100, a discharging area 300, and a demagnetization area 200 disposed therebetween. The demagnetization area 200 includes: a charge accumulation area 210, disposed close to the feeding area 100, with negative charges or positive charges accumulated on one side thereof; an electric field area 220, disposed close to the discharging area 300, in which an electric field is formed; and a magnetic plate 230, disposed in the electric field area 220, providing magnetic force to the magnetic substances in the slurry in the electric field area 220;

[0050] Among them, after the slurry enters the electric field area 220, the magnetic substances therein carrying positive charges or negative charges move towards the magnetic plate 230 under the action of the electric field force provided by the electric field area 220 and are adsorbed by the magnetic plate 230.

[0051] The magnetic substances are substances that can generate magnetism under the action of a magnetic field, including metal and non-metal impurities.

[0052] The overall layout of the device consists of a feed area 100, a discharge area 300 and a demagnetization area 200 located between the two. The feed area 100 is the entrance for the slurry to enter the demagnetization device. Through reasonable flow channel design, it is ensured that the slurry can enter the demagnetization area 200 smoothly and evenly; while the discharge area 300 is responsible for collecting the demagnetized slurry for subsequent use.

[0053] The core portion of the demagnetization zone 200 includes a charge accumulation region 210 , an electric field region 220 and a magnetic plate 230 .

[0054] First, the charge accumulation area 210 is set close to the feed area 100. Its main function is to perform preliminary charge treatment on the magnetic substances that may exist in the slurry before it enters the electric field area 220. This area is designed with a specific electric field so that negative charges or positive charges are accumulated on one side. When the slurry flows through this area, the positive or negative charges on the magnetic substances in it will be taken away by the action of the electric field, leaving only one type of charge.

[0055] Next, the electric field region 220 is set close to the discharge region 300. In this region, a stable and uniform electric field is formed, which has a strong attraction for the charged magnetic material. When the magnetic material with positive or negative charge enters the electric field region 220, they will be affected by the electric field force and move towards the magnetic plate 230.

[0056] The magnetic plate 230 is one of the key components of the demagnetization zone 200, and is located in the electric field zone 220. The magnetic plate 230 has a strong magnetic force, and can produce an adsorption effect on the magnetic substances entering the electric field zone 220. Since the magnetic substances only have positive or negative charges before entering the electric field zone 220, they will be quickly attracted and attached to the magnetic plate 230 under the action of the electric field force. In this way, the magnetic substances in the slurry are effectively separated from the slurry.

[0057] The entire demagnetization process is efficient and accurate, and can not only remove magnetic substances in the slurry, but also effectively remove non-magnetic but charged magnetic substances. The technical effect of this demagnetization device is very significant, and can greatly improve product quality and production efficiency. At the same time, since the magnetic plate 230 can be easily removed and cleaned, the entire demagnetization device also has good maintainability and long life.

[0058] In summary, this demagnetization device achieves efficient removal of magnetic substances in the slurry through the synergistic effect of the charge accumulation area 210, the electric field area 220 and the magnetic plate 230. Its technical effect is not only reflected in the removal rate of magnetic substances, but also in the significant improvement of product quality and production efficiency.

[0059] It should be noted that the feeding area 100 and the discharging area 300 are respectively composed of two pipes 10. The two pipes 10 are respectively connected to the inlet end and the outlet end of the demagnetization area 200. The two pipes 10 are both stainless steel pipes, and the two pipes 10 are connected to both sides of the demagnetization area 200 through insulating pipes 20.

[0060] For the convenience of transporting and outputting the slurry to the demagnetization area 200, two pipes 10 are provided for connection. Specifically, they are connected through stainless steel pipes 10, and then the connection parts are connected through insulating pipes 20 (non-conductive material pipes) to avoid the release of electric charges.

[0061] Embodiment 2:

[0062] This embodiment is a further improvement based on Embodiment 1.

[0063] As Figures 3 - 6 shown, in this embodiment, specifically, the charge accumulation area 210 includes: a first upper plate 211; a first lower plate 212, which is arranged up and down with the first upper plate 211; and a first side plate 213. There are two first side plates 213, which connect the first upper plate 211 and the first lower plate 212. Among them, one of the first upper plate 211, the first lower plate 212 and the two first side plates 213 is a conductive plate a, and the rest are insulating plates;

[0064] Among them, the conductive plate a is connected to the positive pole of a power supply a (not shown in the figure) through a wire, and the negative pole of the power supply a is grounded; or the conductive plate a is connected to the negative pole of the power supply a through a wire, and the positive pole of the power supply a is grounded.

[0065] The electric field area 220 includes: a second upper plate 221; a second lower plate 222, which is arranged up and down with the second upper plate 221; and a second side plate 223. There are two second side plates 223, which connect the second upper plate 221 and the second lower plate 222.

[0066] Among them, the second upper plate 221 and the second lower plate 222 are conductive plates b, and the two second side plates 223 are insulating plates; or the two second side plates 223 are conductive plates b, and the second upper plate 221 and the second lower plate 222 are insulating plates; One of the conductive plates b is connected to the positive pole of a power supply b (not shown in the figure) through a wire, and the other conductive plate b is connected to the negative pole of the power supply b through a wire.

[0067] In order to enable the successful formation of an electric potential in the charge accumulation region 210, a first upper plate 211, a first lower plate 212, and two first side plates 213 are provided. First, the first upper plate 211 and the first lower plate 212 are arranged one above the other. These two plates can be of the same size or adjusted according to actual requirements. Then, the two first side plates 213 tightly connect the first upper plate 211 and the first lower plate 212 together to form a closed structure, ensuring that charges can be effectively accumulated and distributed in this region.

[0068] Among these plate components, one is designed as a conductive plate a, and the rest are made of insulating materials. The conductive plate a is selected to be connected to the power supply a, thereby realizing the electric field regulation of the charge accumulation region 210. The use of insulating plates is to ensure the stability of the electric field in the charge accumulation region 210 and prevent charges from leaking or being unevenly distributed between the plate components.

[0069] When the conductive plate a is connected to the positive pole of the power supply a and the negative pole of the power supply a is grounded, a positive electric field will be formed on the conductive plate a. This electric field layout can effectively attract and accumulate negatively charged particles, causing the negative charges in the magnetic substances in the slurry to be carried away, resulting in the magnetic substances carrying a certain amount of positive charges.

[0070] On the contrary, if the conductive plate a is connected to the negative pole of the power supply a and the positive pole of the power supply a is grounded, then a negative electric field will be formed on the conductive plate a. This electric field layout can attract and accumulate positively charged particles, causing the positive charges in the magnetic substances in the slurry to be carried away, resulting in the magnetic substances carrying a certain amount of negative charges.

[0071] In the plate component configuration of the electric field region 220, there are two possible schemes. The first scheme is that the second upper plate 221 and the second lower plate 222 are used as the conductive plate b, and the two second side plates 223 are made of insulating materials. This configuration makes the electric field mainly concentrated between the upper and lower two conductive plates, forming a vertical electric field. Since the side plates are insulating, they can prevent the electric field from leaking to the outside, thereby improving the concentration and stability of the electric field.

[0072] The second scheme is that the two second side plates 223 are used as the conductive plate b, and the second upper plate 221 and the second lower plate 222 are made of insulating materials. This configuration makes the electric field mainly concentrated between the two side plates, forming a horizontal electric field.

[0073] In terms of the power supply connection of the electric field region 220, one conductive plate b is connected to the positive electrode of the power supply b, while the other conductive plate b is connected to the negative electrode of the power supply b. This connection method ensures that a stable electric field can be formed inside the electric field region 220. When the power supply b is energized, the potential difference between the positive and negative electrodes will generate an electric field in the electric field region 220, causing the charged magnetic material to be affected by the electric field force in the electric field.

[0074] It should be noted that the moving direction of the magnetic material in the electric field region 220 is consistent with the direction of the magnetic attraction force exerted by the magnetic plate 230 on the magnetic material, so that the magnetic material can be adsorbed by the magnetic plate 230.

[0075] Optimally, to ensure that the demagnetization region 200 can demagnetize efficiently, the magnetic plate 230 is arranged on the second lower plate 222, so that the magnetic material completes demagnetization under the triple action of the electric field force, magnetic force and its own gravity. That is to say, the second upper plate 221 and the second lower plate 222 are conductive plates b, while the second side plate 223 is an insulating plate; at the same time, the first upper plate 211 or the first lower plate 212 is a conductive plate a.

[0076] As Figures 3 - 6 shown, furthermore, the first upper plate 211 is a conductive plate a, and the conductive plate a is connected to the positive electrode of the power supply a; the second upper plate 221 is connected to the positive electrode of the power supply b, and the second lower plate 222 is connected to the negative electrode of the power supply b. After the slurry enters the charge accumulation region 210, the negative charges on the magnetic material therein are adsorbed by the first upper plate 211, so that the magnetic material is positively charged. After the positively charged magnetic material enters the electric field region 220, the electric field force in the electric field region 220 causes the magnetic material to move downward, and then under the action of its own gravity and the magnetic attraction force of the magnetic plate 230, it is adsorbed on the magnetic plate 230 to complete demagnetization. The demagnetized slurry is then discharged outward through the discharge region 300.

[0077] Embodiment Three:

[0078] This embodiment is a further improvement based on Embodiment Two.

[0079] As Figures 1 - 6 shown, in this embodiment, a flat channel a214 is formed by enclosing between the first upper plate 211, the first lower plate 212 and the two first side plates 213. The first upper plate 211 and the first lower plate 212 form the large-area end of the flat channel a214; the two first side plates 213 form the small-area end of the flat channel a214;

[0080] Among them, the conductive plate a is on one side of one of the large-area ends of the flat channel a214.

[0081] A flat channel b224 is formed by enclosing between a second upper plate 221, a second lower plate 222 and two second side plates 223. The second upper plate 221 and the second lower plate 222 form the large-area end of the flat channel b224; the two second side plates 223 form the small-area end of the flat channel b224.

[0082] Wherein, the two conductive plates b are respectively on one side of the two large-area ends of the flat channel b224.

[0083] To maintain a good demagnetization effect, the upper and lower plates of this channel should be relatively large, while the height on both sides of the channel should be relatively small. Based on this, the channel is set to be flat.

[0084] It should be noted that in order for the insulating tube 20 to connect the pipeline 10 to the inlet end of the charge accumulation area 210 and the outlet end of the electric field area 220, the insulating tube 20 is designed as a conical structure adapted to both of them.

[0085] The above has described the embodiments of the present disclosure. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technologies in the market, or to enable other ordinary skill in the art in the technical field to understand the embodiments disclosed herein.

Claims

1. A slurry demagnetization device, comprising: A feeding zone (100), a discharging zone (300), and a demagnetization zone (200) disposed therebetween, wherein the demagnetization zone (200) comprises: A charge accumulation region (210), arranged close to the feed region (100), wherein negative charges or positive charges are accumulated on one side thereof; An electric field region (220) is arranged close to the material discharging region (300) and has an electric field formed therein; and a magnetic plate (230) disposed in the electric field region (220) to provide magnetic force to the magnetic material in the slurry in the electric field region (220); After the slurry enters the electric field region (220), the positively or negatively charged magnetic material therein moves towards the magnetic plate (230) under the action of the electric field force provided by the electric field region (220) and is adsorbed by the magnetic plate (230).

2. The slurry demagnetization device according to claim 1, characterized in that: The charge accumulation region (210) includes: First upper plate (211); A first lower plate (212) disposed vertically with the first upper plate (211); and a first side plate (213), wherein the first side plates (213) are two in number and connect the first upper plate (211) and the first lower plate (212); Among the first upper plate (211), the first lower plate (212) and the two first side plates (213), one is a conductive plate a, and the others are insulating plates; The conductive plate a is connected to the positive electrode of the power source a, and the negative electrode of the power source a is grounded; or the conductive plate a is connected to the negative electrode of the power source a, and the positive electrode of the power source a is grounded.

3. The slurry demagnetization device according to claim 2, characterized in that: The first upper plate (211), the first lower plate (212) and the two first side plates (213) enclose a flat channel a (214), and the conductive plate a is located on one side of a large-area end of the flat channel a (214).

4. The slurry demagnetization device according to claim 3, characterized in that: The first upper plate (211) and the first lower plate (212) form a large-area end of the flat channel a (214); and the two first side plates (213) form a small-area end of the flat channel a (214).

5. The slurry demagnetization device according to any one of claims 1 to 4, characterized in that: The electric field region (220) comprises: Second upper plate (221); A second lower plate (222) disposed vertically with the second upper plate (221); and a second side plate (223), wherein the second side plate (223) has two pieces and connects the second upper plate (221) and the second lower plate (222); Wherein, the second upper plate (221) and the second lower plate (222) are conductive plates b, and the two second side plates (223) are insulating plates; Alternatively, the two second side plates (223) are conductive plates b, and the second upper plate (221) and the second lower plate (222) are insulating plates; One of the conductive plates b is connected to the positive electrode of the power source b, and the other conductive plate b is connected to the negative electrode of the power source b.

6. The slurry demagnetization device according to claim 5, characterized in that: The second upper plate (221), the second lower plate (222) and the two second side plates (223) enclose a flat channel b (224), and the two conductive plates b are respectively located on one side of two large-area ends of the flat channel b (224).

7. The slurry demagnetization device according to claim 6, characterized in that: The second upper plate (221) and the second lower plate (222) form the large-area end of the flat channel b (224); and the two second side plates (223) form the small-area end of the flat channel b (224).

8. The slurry demagnetization device according to claim 7, characterized in that: The magnetic plate (230) is arranged on the second lower plate (222).

9. The slurry demagnetization device according to claim 1, characterized in that: The feed zone (100) and the discharge zone (300) are respectively composed of two pipes (10), and the two pipes (10) are respectively connected to the inlet end and the outlet end of the demagnetization zone (200).

10. The slurry demagnetization device according to claim 9, characterized in that: The two pipes (10) are both stainless steel pipes, and the two pipes (10) are connected to both sides of the demagnetization area (200) via insulating pipes (20).

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