Negative electrode material demagnetization device

Abstract

The application provides a negative material demagnetization device, which comprises a box body, a distributing device and a conductive device. Two chain wheels are arranged in the box body, and a chain is connected between the two chain wheels. One of the chain wheels is connected with a motor. A plurality of mounting seats are fixed on the chain. A plurality of electromagnets are arranged on the mounting seats. A conductive structure connected with all the electromagnets on the mounting seats to form a series circuit is arranged at the upper end of the mounting seat. A receiving bin I is arranged below two straight sections of the chain. Receiving bins II are arranged on both sides of the receiving bin I. The distributing device can uniformly distribute materials to the position of the electromagnets above the receiving bin I. When the mounting seat moves above the receiving bin I, the conductive structure is in contact with the conductive device. After the mounting seat moves above the receiving bin II, the conductive structure is separated from the conductive device. The application can automatically clean the magnetic impurities adsorbed on the electromagnets, and the cleaning of the magnetic impurities will not interrupt the demagnetization work, thereby improving the demagnetization efficiency of the negative material.

Description

Technical Field

[0001] This application relates to negative electrode material production technology, and more particularly to a negative electrode material demagnetization device. Background Technology

[0002] In the production process of negative electrode materials, after the raw materials of negative electrode materials are crushed, ground, mixed and sieved, some magnetic impurities are usually mixed into the powdered negative electrode materials. In order to avoid these magnetic impurities affecting the electrochemical performance of the negative electrode materials, it is necessary to remove the magnetic impurities from the powdered negative electrode materials.

[0003] Currently, powdered negative electrode materials typically remove magnetic impurities using permanent magnets. Specifically, multiple horizontally distributed permanent magnets are installed inside the housing. The powdered negative electrode material enters from the top of the housing and falls freely inside. As it falls, the material passes through the magnets, which attract and remove magnetic impurities, thus demagnetizing the material. After a certain amount of impurities has been attracted, the demagnetization process is stopped, the magnets are removed from the housing, and the magnetic impurities are manually cleaned. The magnets are then reinstalled to continue the demagnetization process. However, this method interrupts the demagnetization process when cleaning the magnets, and the manual cleaning process is time-consuming, resulting in low demagnetization efficiency for the powdered negative electrode material. Utility Model Content

[0004] This application provides a demagnetizing device for negative electrode materials, which solves the problems of existing methods for removing magnetic impurities from permanent magnet rods, where the demagnetizing process is interrupted when manually cleaning the magnetic impurities on the permanent magnet rod, and the time-consuming manual cleaning process.

[0005] This application provides a demagnetizing device for negative electrode materials, including a housing, inside which are provided two horizontally distributed sprockets, and a chain connects the two sprockets. One of the sprockets is connected to a motor that can drive it to rotate.

[0006] The chain is fixed with multiple mounting seats located on the outside of the chain. Each mounting seat is provided with multiple vertically distributed, cylindrical electromagnets. The upper end of the mounting seat is provided with a conductive structure, which is connected to all the electromagnets on the mounting seat to form a series circuit.

[0007] The chain has a receiving bin I below its two straight segments, and a receiving bin II on each side of the receiving bin I. The two straight segments of the chain extend above the two receiving bins II.

[0008] It also includes a fabric assembly and a conductive device connected to a power source;

[0009] The material feeding device is located above the electromagnet, and the material feeding device can evenly feed the material to the position of the electromagnet located above the receiving bin I.

[0010] When the mounting base moves above the receiving bin I, the conductive structure comes into contact with the conductive device, and the conductive device supplies power to the conductive structure. After the mounting base moves above the receiving bin II, the conductive structure detaches from the conductive device.

[0011] Optionally, the conductive structure includes two conductive sheets made of elastic metal. Each conductive sheet includes a horizontal segment, one end of which is connected to an inclined segment forming an acute angle with the horizontal segment. The horizontal segment is fixed to the upper end of the mounting base, and the horizontal segments of the two conductive sheets are connected to all electromagnets on the mounting base through wires to form a series short circuit.

[0012] The inclined section can move to the lower end of the conductive device and come into contact with the conductive device, which supplies power to the conductive sheet.

[0013] Optionally, the conductive device includes two mounting plates parallel to the straight segment of the chain and a power cord connected to the power source. The mounting plates are fixed inside the housing, and two conductive strips are fixed to the lower end of the mounting plates. The two ends of the conductive strips extend to the top of the two receiving grooves II, respectively.

[0014] The power cord is connected to all conductive strips simultaneously.

[0015] The inclined sections of the two conductive sheets can contact the lower ends of the two conductive strips respectively while moving, and press the lower ends of the conductive strips tightly.

[0016] Optionally, the electromagnets on two adjacent mounting bases are staggered.

[0017] Optionally, an annular baffle is fixed to the upper inner end of the housing, and the upper parts of the sprocket, chain, conductive device and mounting base are all located inside the baffle.

[0018] Optionally, the fabric feeding device includes a hopper, which is fixed to the upper end of the box. The bottom of the hopper is provided with two discharge ports that are connected to and sealed to the box. Below the discharge ports is a vibrating fabric feeding trough, and the bottom of the fabric feeding trough is a mesh plate structure.

[0019] One of the fabric feed channels is located between one straight segment of the chain and the inner wall of the housing, and the other fabric feed channel is located between another straight segment of the chain and the inner wall of the housing.

[0020] The negative electrode material demagnetizing device provided in this application uses an electromagnet that can move cyclically with a chain. When the electromagnet moves above the receiving bin I, the conductive sheet connected to the electromagnet contacts the conductive device. The electromagnet above the receiving bin becomes magnetic when energized, adsorbing magnetic impurities in the powdered negative electrode material. After the electromagnet moves above the receiving bin II and the conductive structure detaches from the conductive device, the electromagnet loses its magnetism when de-energized, and the magnetic impurities automatically detach from the electromagnet. By circulating the electromagnet, the magnetic impurities adsorbed on the electromagnet can be automatically cleaned, and the demagnetizing process is not interrupted when cleaning the magnetic impurities, thereby improving the demagnetizing efficiency of the negative electrode material. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the main structure of the negative electrode material demagnetizing device provided in the embodiments of this application;

[0023] Figure 2 This is a partial top view of the negative electrode material demagnetizing device provided in the embodiments of this application;

[0024] Figure 3 This is a partial front view cross-sectional structural schematic diagram of the negative electrode material demagnetizing device provided in the embodiments of this application;

[0025] Figure 4 for Figure 3 A magnified structural diagram of region A;

[0026] Figure 5 This is a partial side view cross-sectional structural schematic diagram of the negative electrode material demagnetizing device provided in the embodiments of this application;

[0027] Figure 6 for Figure 5 A magnified structural diagram of region B.

[0028] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Sprocket; 3. Chain; 4. Straight section I; 5. Straight section II; 6. Motor; 7. Mounting shaft I; 8. Mounting shaft II; 9. Reducer; 10. Mounting base; 11. Connecting pipe; 11. Connecting frame; 11. Electromagnet; 11. Conductive structure; 11. Conductive sheet; 112. Horizontal section; 113. Inclined section; 12. Receiving bin I; 13. Receiving bin II; 14. Material distribution device; 141. Hopper; 142. Discharge port; 143. Material distribution trough; 144. Spring assembly; 145. Vibrator; 15. Conductive device; 151. Mounting plate; 152. Mounting frame; 153. Conductive strip; 16. Baffle. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0030] like Figures 1-6 As shown:

[0031] An embodiment of this application provides a demagnetizing device for negative electrode materials, comprising a housing 1. Inside the housing 1 are two horizontally distributed sprockets 2, connected by a chain 3. The chain 3 has a ring structure. One sprocket 2 is connected to a motor 4 capable of rotating it. Specifically, one sprocket 2 is fixedly connected to a mounting shaft I5, which passes through the upper end of the housing 1 and is rotatably connected to the upper end of the housing 1 via a bearing. The other sprocket 2 is rotatably connected to a mounting shaft II6 via a bearing, which is fixedly connected to the upper end of the housing 1. A reducer 7 is fixedly mounted on the upper end of the housing 1, and the motor 4 is fixed to the reducer 7. The output shaft of the motor 4 is connected to the power input end of the reducer 7, and the upper end of the mounting shaft I5 is connected to the power output end of the reducer 7, causing the sprocket 2 to rotate slowly, i.e., the chain 3 to move slowly.

[0032] Multiple mounting bases 8 are fixed on the outer side of the chain 3. Specifically, the mounting base 8 is fixed with a connecting bracket 9, which is detachably fixed to the chain 3 by bolts.

[0033] The mounting base 8 is provided with multiple vertically distributed, cylindrical electromagnets 10, which are horizontally arranged. The upper end of the mounting base 8 is provided with a conductive structure 11, which is connected to all the electromagnets 10 on the mounting base 8 to form a series circuit. Specifically, the mounting base 8 is a hollow structure, and it also includes multiple vertically distributed connecting tubes 81 that are connected to and fixed to the mounting base 8. One end of each electromagnet 10 extends into the connecting tube 81 and is threadedly connected to it.

[0034] In this embodiment, because the chain 3 moves slowly, the chain 3 drives the electromagnet 10 to move slowly. After the electromagnet 10 moves slowly, the effect of the electromagnet 10 in adsorbing magnetic impurities can be improved.

[0035] Below the two straight segments of chain 3, there is a receiving bin I 12, and on both sides of the receiving bin I 12, there is a receiving bin II 13, and the two straight segments of chain 3 extend above the two receiving bins II 13.

[0036] Furthermore, the two arc-shaped segments of chain 3 are located above the two receiving bins II13, respectively.

[0037] It also includes a fabric-making device 14 and a conductive device 15 connected to a power source.

[0038] The material feeding device 14 is located above the electromagnet 10, and the material feeding device 14 can evenly feed the material to the position of the electromagnet 10 located above the receiving bin I 12.

[0039] When the mounting base 8 moves above the receiving bin I 12, the conductive structure 11 comes into contact with the conductive device 15, and the conductive device 15 supplies power to the conductive structure 11. After the mounting base 8 moves above the receiving bin II 13, the conductive structure 11 disengages from the conductive device 15.

[0040] Furthermore, a bracket is fixed to the lower end of the box 1 to support the box 1.

[0041] In this embodiment, chain 3 includes straight segment I 31 and straight segment II 32.

[0042] In use, motor 4 drives sprocket 2 to rotate via reducer 7. Sprocket 2 drives chain 3 to move, and chain 3 drives all mounting seats 8 to move cyclically. Each mounting seat 8 drives all electromagnets 10 connected to it to move synchronously, that is, the electromagnets 10 move cyclically. When the electromagnets 10 are located at the straight section I 31 and straight section II 32 and move above the receiving bin I 12, the conductive structure 11 contacts the conductive device 15, and the electromagnets 10 above the receiving bin I 12 are energized and become magnetic. At the same time, the feeding device 14 evenly feeds the powdered negative electrode material to the position of the electromagnets 10 above the receiving bin I 12. The powdered negative electrode material falls evenly into the receiving bin I 12. When the powdered negative electrode material falls, it passes through the energized electromagnets 10. The electromagnets 10 adsorb magnetic impurities in the powdered negative electrode material, demagnetizing the negative electrode material. The demagnetized negative electrode material... As the electromagnet 10 moves into receiving bin I 12, the magnetic impurities it attracts also move synchronously. When the electromagnet 10 in straight segment I 31 moves above receiving bin II 13 located to the right of receiving bin I 12 and the conductive structure 11 disengages from the conductive device 15, the electromagnet 10 attracting the magnetic impurities is de-energized, and the electromagnet that attracts the impurities loses its magnetism. The magnetic impurities fall into receiving bin II 13 to the right of receiving bin I 12 due to their own gravity. When the electromagnet 10 in straight segment II 32 moves above receiving bin II 13 located to the left of receiving bin I 12 and the conductive structure 11 disengages from the conductive device 15, the electromagnet 10 attracting the magnetic impurities is de-energized, and the electromagnet that attracts the impurities loses its magnetism. The magnetic impurities fall into receiving bin II 13 to the left of receiving bin I 12 due to their own gravity. After the electromagnet 10 moves in this cycle, the demagnetization of the negative electrode material is continuously performed.

[0043] The negative electrode material demagnetizing device provided in this embodiment uses an electromagnet 10 that can move cyclically with the chain 3. When the electromagnet 10 moves above the receiving bin I 12, the conductive sheet 111 connected to the electromagnet 10 contacts the conductive device 15. The electromagnet 10 located above the receiving bin becomes magnetic when energized, adsorbing magnetic impurities in the powdered negative electrode material. After the electromagnet 10 moves above the receiving bin II 13 and the conductive structure 11 is separated from the conductive device 15, the electromagnet 10 loses its magnetism when de-energized, and the magnetic impurities automatically detach from the electromagnet 10. Thus, after the electromagnet 10 moves cyclically, it can automatically clean the magnetic impurities adsorbed on the electromagnet 10, and the demagnetizing work is not interrupted when cleaning the magnetic impurities, thereby improving the demagnetizing efficiency of the negative electrode material.

[0044] In some embodiments of this application, the conductive structure 11 includes two conductive sheets 111 made of elastic metal. Each conductive sheet 111 includes a horizontal segment 112. One end of the horizontal segment 112 is connected to an inclined segment 113 that forms an acute angle with it. The horizontal segment 112 and the inclined segment 113 are integral structures. The horizontal segment 112 is fixed to the upper end of the mounting base 8 by bolts. The horizontal segments 112 of the two conductive sheets 111 are connected to all the electromagnets 10 on the mounting base 8 through wires (not shown in the figure) to form a series short circuit.

[0045] Specifically, the horizontal segment 112 of one of the conductive pieces 111 is connected to one of the terminals of the electromagnet 10 via a wire, and the horizontal segment 112 of the other conductive piece 111 is connected to the other terminal of the electromagnet 10 via a wire, with the wires disposed within the mounting base 8.

[0046] The inclined section 113 can move to the lower end of the conductive device 15 and come into contact with the conductive device 15, which supplies power to the conductive sheet 111.

[0047] In this embodiment, the mounting base 8 is made of plastic for insulation. The conductive sheet 111 is made of a flexible copper alloy.

[0048] In some embodiments of this application, the conductive device 15 includes two mounting plates 151 parallel to the straight segment of the chain 3 and a power cord (not shown) connected to a power source. The mounting plates 151 are fixed inside the housing 1. Specifically, a mounting bracket 152 is fixed to the upper end of the mounting plate 151, and the mounting bracket 152 is fixedly connected to the upper end of the housing 1. Two conductive strips 153 are fixed to the lower end of the mounting plate 151 by bolts, and the two ends of the conductive strips 153 extend above the two receiving grooves II, respectively.

[0049] In this embodiment, the mounting plate 151 is made of plastic for insulation, and the conductive strip 153 is made of copper.

[0050] The power cord is connected to all conductive strips 153 simultaneously. Specifically, one conductive strip 153 on each mounting plate 151 is connected to the positive terminal of the power cord, and the other conductive strip 153 on each mounting plate 151 is connected to the negative terminal of the power cord.

[0051] The inclined segments 113 of the two conductive sheets 111 can contact the lower ends of the two conductive strips 153 respectively while moving, and press the lower ends of the conductive strips 153 tightly.

[0052] In this embodiment, one mounting plate 151 is disposed above the mounting base 8 located on the straight segment I 31, and the other mounting groove is disposed above the mounting base 8 located on the straight segment II 32. When the two conductive pieces 111 at the upper end of each mounting base 8 are located on the straight segment of the chain 3, each conductive piece 111 is located at the lower end of the corresponding conductive strip 153.

[0053] In use, when the two conductive plates 111 at the top of each mounting base 8 move with the chain 3 to the straight section of the chain 3 and are about to move above the receiving bin I 12, the middle position of the inclined section 113 of each conductive plate 111 first contacts the end of the conductive strip 153. As the conductive plate 111 continues to move, the inclined section 113 is pressed down under the action of the conductive strip 153, that is, the angle between the inclined section 113 and the horizontal section 112 becomes smaller. After the conductive plate 111 moves continuously, the inclined section 113 moves to the lower end of the conductive strip 153 and presses tightly against the lower end of the conductive strip 153 under its elastic force. The conductive strip 153 contacts the conductive plate 111 and supplies power to the conductive plate 111. When the inclined section 113 is separated from the conductive strip 153, the inclined section 113 returns to the free state under its elastic force, that is, the conductive plate 111 is de-energized.

[0054] In some embodiments of this application, the electromagnets 10 on two adjacent mounting bases 8 are staggered to improve the effect of the electromagnets 10 in attracting magnetic impurities.

[0055] In some embodiments of this application, a ring-shaped baffle 16 is fixed to the upper inner end of the housing 1. The upper parts of the sprocket 2, chain 3, conductive device 15 and mounting base 8 are all located inside the baffle 16 to protect the sprocket 2, chain 3, conductive device 15 and conductive structure 11.

[0056] In some embodiments of this application, the fabric feeding device 14 includes a hopper 141, which is fixed to the upper end of the box 1. The bottom of the hopper 141 is provided with two discharge ports 142 that are connected and sealed to the box 1. Below the discharge ports 142 is a vibrating fabric feeding trough 143, and the bottom of the fabric feeding trough 143 is a mesh structure.

[0057] One of the fabric grooves 143 is located between one straight segment of the chain 3 and the inner wall of the housing 1, and the other fabric groove 143 is located between another straight segment of the chain 3 and the inner wall of the housing 1.

[0058] In this embodiment, the fabric trough 143 is connected to both the inner wall of the housing 1 and the baffle 16 via a spring assembly 144, and a vibrator 145 is installed on the fabric trough 143.

[0059] In use, the vibrator 145 is started. Under the action of the spring assembly 144, the vibrator 145 drives the material trough 143 to vibrate. Then, the negative electrode material to be demagnetized is added into the hopper 141 through the conveying equipment. The negative electrode material in the hopper 141 falls from the feed port into the material trough 143. After the material trough 143 vibrates, it evenly distributes the material to the electromagnet 10 located at the straight end of the chain 3, thereby improving the demagnetization effect of the negative electrode material.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A demagnetizing device for negative electrode materials, comprising a housing (1), characterized in that: The housing (1) is equipped with two horizontally distributed sprockets (2), and a chain (3) is connected between the two sprockets (2). One of the sprockets (2) is connected to a motor (4) that can drive it to rotate. The chain (3) is fixed with multiple mounting seats (8) located on the outside of the chain (3). The mounting seats (8) are provided with multiple vertically distributed and cylindrical electromagnets (10). The upper end of the mounting seat (8) is provided with a conductive structure (11). The conductive structure (11) is connected to all the electromagnets (10) on the mounting seat (8) to form a series circuit. The chain (3) has a receiving bin I (12) below the two straight segments, and a receiving bin II (13) is provided on both sides of the receiving bin I (12), and the two straight segments of the chain (3) extend above the two receiving bins II (13); It also includes a fabric device (14) and a conductive device (15) connected to a power source. The material distribution device (14) is located above the electromagnet (10), and the material distribution device (14) can distribute the material evenly to the position of the electromagnet (10) located above the receiving bin I (12); When the mounting base (8) moves above the receiving bin I (12), the conductive structure (11) comes into contact with the conductive device (15), and the conductive device (15) supplies power to the conductive structure (11). After the mounting base (8) moves above the receiving bin II (13), the conductive structure (11) disengages from the conductive device (15).

2. The negative electrode material demagnetizing device according to claim 1, characterized in that: The conductive structure (11) includes two flexible metal conductive sheets (111), each conductive sheet (111) including a horizontal section (112), one end of which is connected to an inclined section (113) forming an acute angle with it. The horizontal section (112) is fixed to the upper end of the mounting base (8), and the horizontal sections (112) of the two conductive sheets (111) are connected to all the electromagnets (10) on the mounting base (8) through wires to form a series short circuit. The inclined section (113) can move to the lower end of the conductive device (15) and contact the conductive device (15), which supplies power to the conductive sheet (111).

3. The negative electrode material demagnetizing device according to claim 2, characterized in that: The conductive device (15) includes two mounting plates (151) parallel to the straight segment of the chain (3) and a power cord connected to the power source. The mounting plates (151) are fixed inside the housing (1). Two conductive strips (153) are fixed at the lower end of the mounting plates (151). The two ends of the conductive strips (153) extend to the top of the two receiving grooves II respectively. The power cord is connected to all conductive strips (153) at the same time; The inclined sections (113) of the two conductive sheets (111) can contact the lower ends of the two conductive strips (153) respectively while moving, and press the lower ends of the conductive strips (153) tightly.

4. The demagnetizing device for negative electrode material according to claim 1, characterized in that: The electromagnets (10) on two adjacent mounting bases (8) are staggered.

5. The negative electrode material demagnetizing device according to claim 3, characterized in that: The upper inner end of the housing (1) is fixed with a baffle (16) of an annular structure, and the upper parts of the sprocket (2), chain (3), conductive device (15) and mounting base (8) are all located inside the baffle (16).

6. The negative electrode material demagnetizing device according to claim 5, characterized in that: The fabric feeding device (14) includes a hopper (141), which is fixed to the upper end of the box (1). The bottom of the hopper (141) is provided with two discharge ports (142) that are connected and sealed to the box (1). Below the discharge ports (142) is a vibrating fabric trough (143), and the bottom of the fabric trough (143) is a mesh structure. One of the fabric grooves (143) is located between one straight segment of the chain (3) and the inner wall of the box (1), and the other fabric groove (143) is located between another straight segment of the chain (3) and the inner wall of the box (1).

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