Slurry mixing device for lithium battery production

Abstract

The utility model relates to a slurry mixing device for lithium battery production, which comprises a mixing cylinder, a quantifying cylinder and a shielding piece, the quantifying cylinder is provided with a blanking channel communicated with the mixing cylinder and a charging hole for charging into the blanking channel; the shielding piece has a first position state for sealing the feeding opening and enabling the discharging channel to be communicated with the mixing barrel and a second position state for sealing the discharging channel and enabling the feeding opening to be communicated with the discharging channel. According to the slurry mixing and stirring device for lithium battery production disclosed by the utility model, through the arrangement of the quantitative cylinder and the shielding piece, when the shielding piece is in a second position state, a conductive agent is added into the discharging channel through the charging hole; after a certain period of time, the shielding piece is in the first position state, the conductive agent does not enter the discharging channel any more, at the moment, a preset amount of conductive agent is stored in the discharging channel, the preset amount of conductive agent directly enters the mixing barrel to participate in slurry mixing, and therefore quantitative feeding of the conductive agent is achieved, operation is easy, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a slurry mixing device used for lithium battery production. Background Art

[0002] Lithium battery is a rechargeable battery that uses lithium ions as charge carriers. It is an important rechargeable battery technology that is widely used in mobile devices, electric vehicles, power tools and various portable electronic devices.

[0003] The manufacturing of lithium batteries involves multiple complex steps, including material preparation, electrode preparation, assembly and packaging. During the material preparation process, the mixture of lithium iron phosphate and lithium cobalt oxide needs to be stirred and mixed with the conductive agent to form a slurry. During this process, the conductive agent needs to be added quantitatively and gradually during the stirring process to ensure the degree of mixing. At present, when the slurry mixing device is used, the conductive agent is mostly added directly into the mixing barrel manually, and the amount added is also manually controlled, which cannot ensure the uniformity of the amount added each time. Utility Model Content

[0004] Based on this, it is necessary to address the technical problem that when the current slurry stirring device is used, the conductive agent is mostly added directly into the mixing barrel manually and the amount added is also manually controlled, and the uniform amount added each time cannot be guaranteed. The utility model proposes a slurry stirring device for lithium battery production.

[0005] The utility model proposes a slurry stirring device for lithium battery production, comprising a mixing cylinder, a metering cylinder and a shielding member, the metering cylinder having a feeding channel communicated with the mixing cylinder and a feeding port for feeding materials into the feeding channel, the shielding member having a first position state for closing the feeding port and connecting the feeding channel with the mixing cylinder, and a second position state for closing the feeding channel and connecting the feeding port with the feeding channel.

[0006] In the slurry stirring device for lithium battery production of the utility model, through the arrangement of the metering cylinder and the shielding member, when the shielding member is in the second position state, a conductive agent is added into the lower material channel through the feeding port; after a certain period of time, the shielding member is in the first position state, and the conductive agent no longer enters the lower material channel. At this time, a predetermined amount of conductive agent is stored in the lower material channel, and the predetermined amount of conductive agent directly enters the mixing cylinder to participate in the slurry mixing, thereby realizing the quantitative feeding of the conductive agent, and the operation is simple and convenient to use.

[0007] As a further improvement of the above scheme of the utility model, a circular ring is fixed in the metering cylinder, a feeding tube coaxial with the circular ring is arranged on the top of the circular ring, a movable block which can move up and down in the metering cylinder is movable sleeved outside the feeding tube, and the inner cavity of the movable block cooperates with the inner cavity of the circular ring to form a feeding channel.

[0008] As a further improvement of the above-mentioned scheme of the utility model, the shielding member includes a cylinder, a block and a sealing plate. The cylinder is installed on the top of the metering cylinder and its telescopic rod extends into the metering cylinder. The block is arranged in the metering cylinder and is located above the movable block. The outer peripheral surface of the block is slidably matched with the inner wall of the metering cylinder and is connected to the telescopic rod of the cylinder. The feeding port is arranged between the block and the movable block; the sealing plate is located below the ring and can block the opening of the ring. The sealing plate is connected to the block through a push rod.

[0009] As a further improvement of the above-mentioned scheme of the utility model, a plurality of vertically arranged guide rods are provided on the top of the circular ring, which extend into the movable block and slideably cooperate with the movable block; an adjusting ring coaxially arranged with the circular ring is rotatably installed on the metering cylinder, and an internal thread groove ring is provided on the inner side surface of the adjusting ring located in the metering cylinder; an external thread groove ring threadably cooperates with the internal thread groove ring is provided on the outer peripheral surface of the movable block.

[0010] As a further improvement of the above solution of the utility model, it also includes a feeding pipe, the bottom end of the feeding pipe is connected to the feeding port and the top end of the feeding pipe is connected to the feeding hopper.

[0011] As a further improvement of the above solution of the utility model, a plurality of supporting legs are arranged at the bottom of the mixing cylinder.

[0012] As a further improvement of the above solution of the utility model, a feed hopper is arranged on the top of the mixing cylinder, and a discharge valve is arranged on the top of the mixing cylinder.

[0013] As a further improvement of the above solution of the utility model, a motor is installed on the top of the mixing drum, a stirring shaft connected to the output end of the motor is arranged in the mixing drum, and a plurality of stirring rods are arranged on the stirring shaft.

[0014] As a further improvement of the above solution of the utility model, a plurality of bending rods are arranged on the stirring shaft, and a scraper which is in contact with the inner wall of the mixing barrel is arranged on the outer side of the bending rod.

[0015] As a further improvement of the above solution of the utility model, a transparent observation window is provided on the side wall of the mixing cylinder.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. In the slurry stirring device for lithium battery production of the utility model, through the arrangement of the metering cylinder and the shielding member, when the shielding member is in the second position state, the conductive agent is added into the lower feeding channel through the feeding port; after a certain period of time, the shielding member is in the first position state, and the conductive agent no longer enters the lower feeding channel. At this time, a predetermined amount of conductive agent is stored in the lower feeding channel, and the predetermined amount of conductive agent directly enters the mixing cylinder to participate in the slurry mixing, thereby realizing the quantitative feeding of the conductive agent, which is simple to operate and convenient to use.

[0018] 2. In the present invention, the position of the movable block in the metering cylinder is adjusted by setting an adjustment ring, an internal thread groove ring and an external thread groove ring, thereby adjusting the capacity of the feeding channel and adjusting the amount of conductive agent added at a single time.

[0019] 3. The utility model also provides a bending rod and a scraper, which can scrape the inside of the mixing drum when the slurry is mixed and stirred, so as to avoid the slurry adhering to the inner wall of the mixing drum and causing uneven mixing; and after the slurry is mixed and stirred, the slurry on the inner wall of the mixing drum is scraped off by the scraper to avoid waste of slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a slurry mixing device for lithium battery production proposed in an embodiment of the utility model;

[0021] Figure 2 A cross-sectional view of a metering cylinder in a slurry mixing device for lithium battery production proposed in an embodiment of the utility model;

[0022] Figure 3 A cross-sectional view of a mixing drum in a slurry stirring device for lithium battery production proposed in an embodiment of the utility model.

[0023] Figure numerals: 1. mixing cylinder; 2. metering cylinder; 3. discharge channel; 4. circular ring; 5. discharge pipe; 6. movable block; 7. cylinder; 8. stopper; 9. sealing plate; 10. guide rod; 11. adjusting ring; 12. internal thread groove ring; 13. external thread groove ring; 14. feeding pipe; 15. feeding hopper; 16. supporting leg; 17. feeding hopper; 18. discharge valve; 19. motor; 20. stirring shaft; 21. stirring rod; 22. bending rod; 23. scraper; 24. observation window; 25. push rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] This embodiment aims to solve the technical problem that when the current slurry mixing device is used, the conductive agent is mostly added directly into the mixing barrel manually and the amount added is also manually controlled, and the uniform amount added each time cannot be guaranteed. A slurry mixing device for lithium battery production is provided.

[0028] Reference Figure 1 and Figure 2 The slurry mixing device for lithium battery production in this embodiment includes a mixing cylinder 1, a metering cylinder 2 and a shielding member, and may also include a feeding pipe 14.

[0029] The mixing drum 1 has a stirring chamber inside. A feed hopper 17 connected to the stirring chamber is installed on the top of the mixing drum 1. The mixed solution of lithium iron phosphate and lithium cobalt oxide is added to the stirring chamber through the feed hopper 17. A plurality of support legs 16 are provided at the bottom of the mixing drum 1. The mixing drum 1 is fixed in a specified position by the support legs 16. A discharge valve 18 connected to the stirring chamber is also provided at the bottom of the mixing drum 1. After the mixing of the slurry is completed, it is discharged through the discharge valve 18. Figure 3 A motor 19 is also installed on the top of the mixing drum 1. A stirring shaft 20 is coaxially arranged therewith inside the mixing drum 1. The top of the stirring shaft 20 is connected to the output end of the motor 19. A plurality of stirring rods 21 are arranged on the stirring shaft 20. The stirring shaft 20 is driven to rotate by the motor 19, so that the slurry in the stirring chamber is stirred and mixed by the plurality of stirring rods 21. In this embodiment, the shape of the stirring rod 21 can be L-shaped. Of course, in other embodiments, the stirring rod 21 can also be C-shaped or other shapes.

[0030] A plurality of bending rods 22 are also provided on the stirring shaft 20. The top of the bending rod 22 is connected to the stirring shaft 20 and a scraper 23 that fits the inner wall of the mixing drum 1 is provided on the side away from the stirring shaft 20. The bending rod 22 can rotate with the stirring shaft 20. When the bending rod 22 rotates, it drives the scraper 23 to scrape off the slurry attached to the inner wall of the mixing drum 1 to avoid the slurry hanging on the wall. In this embodiment, the bending rod 22 can be a [-shaped structure, and the scraper 23 is arranged on the vertical section of the bending rod 22 to ensure that the slurry attached to the inner wall of the mixing drum 1 can be scraped off. In addition, after the mixing slurry is stirred, the stirring shaft 20 is driven to rotate by the motor 19, which can also drive the bending rod 22 to rotate. The slurry on the inner wall of the mixing drum 1 can be scraped off by the scraper 23 at the outer end of the bending rod 22, which can avoid wasting the slurry.

[0031] In this embodiment, in order to facilitate the observation of the stirring of the slurry inside the mixing cylinder 1 , a transparent observation window 24 is provided on the side wall of the mixing cylinder 1 .

[0032] The dosing cylinder 2 is mounted on the top of the mixing cylinder 1 and its bottom is connected to the stirring chamber. A circular ring 4 is coaxially fixed inside the dosing cylinder 2, and a feeding tube 5 coaxial therewith is arranged on the top of the circular ring 4. A movable block 6 that can move up and down inside the dosing cylinder 2 is movably sleeved outside the feeding tube 5. The inner cavity of the movable block 6 cooperates with the inner cavity of the circular ring 4 to form a feeding channel 3. By adjusting the position of the movable block 6 inside the dosing cylinder 2, the capacity of the feeding channel 3 can be adjusted. A feeding port for adding a conductive agent into the feeding channel 3 is also provided on the side wall of the dosing cylinder 2.

[0033] In this embodiment, in order to facilitate the adjustment of the position of the movable block 6, a plurality of vertically arranged guide rods 10 are provided on the top of the circular ring 4, the guide rods 10 extend into the movable block 6 and slide with the movable block 6, an adjusting ring 11 coaxially arranged with the circular ring 4 is rotatably mounted on the quantitative cylinder 2, an internal thread groove ring 12 is provided on the inner side of the adjusting ring 11 located in the quantitative cylinder 2, and an external thread groove ring 13 threadably matched with the internal thread groove ring 12 is provided on the outer peripheral surface of the movable block 6. In this way, by rotating the adjusting ring 11 outside the quantitative cylinder 2, the adjusting ring 11 drives the internal thread groove ring 12 to rotate, thereby driving the movable block 6 to move up and down in the quantitative cylinder 2.

[0034] The shielding member has a first position state in which the feeding port is closed and the feeding channel 3 is connected to the mixing cylinder 1, and a second position state in which the feeding port is closed and the feeding channel 3 is connected to the feeding channel 3. In this embodiment, the shielding member includes a cylinder 7, a block 8 and a sealing plate 9. The cylinder 7 is installed on the top of the quantitative cylinder 2 and its telescopic rod extends into the quantitative cylinder 2. The block 8 is arranged in the quantitative cylinder 2 and is located above the movable block 6. The outer peripheral surface of the block 8 is slidably matched with the inner wall of the quantitative cylinder 2 and is connected to the telescopic rod of the cylinder 7. The feeding port is arranged between the block 8 and the movable block 6; the sealing plate 9 is located below the ring 4 and can block the opening of the ring 4. The sealing plate 9 is connected to the block 8 through the push rod 25. The extension and contraction of the cylinder 7 can drive the block 8 to descend and rise, and the descent and rise of the block 8 can drive the sealing plate 9 to descend and rise. The cylinder 7 contracts and drives the block 8 to rise to the top of the metering cylinder 2, the feeding port is connected with the feeding channel 3, and the conductive agent enters the feeding channel 3 from the feeding port. At the same time, the sealing plate 9 follows the block 8 to rise and blocks the opening of the ring 4 to cut off the connection between the feeding channel 3 and the stirring chamber; after a certain period of time, the motor 19 extends and drives the block 8 to descend a predetermined distance, so that the block 8 blocks the feeding port and prevents the conductive agent from entering the feeding channel 3. At this time, a predetermined amount of conductive agent is stored in the feeding channel 3. At the same time, the sealing plate 9 follows the block 8 to descend to open the opening of the ring 4, so that the feeding channel 3 is connected with the stirring chamber, and the quantitative conductive agent stored in the feeding channel 3 directly enters the stirring chamber from the opening of the ring 4, thereby realizing the quantitative feeding of the conductive agent.

[0035] To facilitate the feeding of the conductive agent, the bottom end of the feeding pipe 14 is connected to the feeding port and the top end is connected to the feeding hopper 15. By adding a predetermined amount of conductive agent into the feeding hopper 15, the conductive agent in the feeding hopper 15 is added to the feeding channel 3 regularly and quantitatively under the action of the shielding member.

[0036] Next, the working principle of this embodiment is described.

[0037] First, a mixed solution of lithium iron phosphate and lithium cobalt oxide is added to the mixing barrel 1 through the feed hopper 17, and then a conductive agent is added to the feeding hopper 15. The conductive agent will enter the discharge channel 3 inside the metering barrel 2 through the feeding tube 14; then the DC motor 19 is started, and the motor 19 drives the stirring shaft 20 to rotate, driving the stirring rod 21 to rotate, and stirring the mixed solution, and then the cylinder 7 is started, and the cylinder 7 drives the block 8 to descend. The right side of the block 8 will form a block on the connection between the feeding port and the discharge channel 3 to prevent the conductive agent from continuing to enter the discharge channel 3; at the same time, when the block 8 descends, it will also drive the push rod 25 to descend, and the push rod 25 will push the sealing plate 9 open to open the discharge channel 3, and the conductive agent will flow along the discharge channel Channel 3 enters into the mixing barrel 1 to participate in the stirring of lithium iron phosphate and lithium cobalt oxide; after a certain period of time, the cylinder 7 controls the block 8 to move upward, opens the feeding port, and makes the sealing plate 9 close the feeding channel 3; in this way, the conductive agent can be gradually and quantitatively added through the reciprocating up and down movement of the block 8 and the sealing plate 9; when it is necessary to adjust the amount of conductive agent added each time, by rotating the adjusting ring 11, the adjusting ring 11 will drive the internal thread groove ring 12 to rotate, and the threaded connection transmission between the internal thread groove ring 12 and the external thread groove ring 13 drives the movable block 6 to move up and down, thereby controlling the distance between the movable block 6 and the block 8, changing the capacity of the feeding channel 3, and realizing the adjustment of the amount of conductive agent added.

[0038] It should be noted that, in other embodiments, the shielding member may further include two solenoid valves, which are respectively arranged at the feeding port and in the opening of the ring 4, and quantitative feeding of the conductive agent is achieved by controlling the periodic opening and closing of the two solenoid valves.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A slurry mixing device for lithium battery production, comprising a mixing drum (1), characterized in that: It also includes a metering cylinder (2) and a shielding member, the metering cylinder (2) having a feeding channel (3) communicating with the mixing cylinder (1) and a feeding port for feeding materials into the feeding channel (3), the shielding member having a first position state in which the feeding port is closed and the feeding channel (3) is connected to the mixing cylinder (1), and a second position state in which the feeding channel (3) is closed and the feeding port is connected to the feeding channel (3).

2. The slurry mixing device for lithium battery production according to claim 1, characterized in that: A circular ring (4) is fixed inside the dosing cylinder (2), a feeding tube (5) coaxial with the circular ring (4) is arranged on the top of the circular ring (4), a movable block (6) movable up and down inside the dosing cylinder (2) is movably sleeved outside the feeding tube (5), and the inner cavity of the movable block (6) cooperates with the inner cavity of the circular ring (4) to form a feeding channel (3).

3. The slurry mixing device for lithium battery production according to claim 2, characterized in that: The shielding member comprises a cylinder (7), a block (8) and a sealing plate (9); the cylinder (7) is mounted on the top of the metering cylinder (2) and its telescopic rod extends into the metering cylinder (2); the block (8) is arranged in the metering cylinder (2) and is located above the movable block (6); the outer peripheral surface of the block (8) is slidably matched with the inner wall of the metering cylinder (2) and is connected to the telescopic rod of the cylinder (7); the feeding port is arranged between the block (8) and the movable block (6); the sealing plate (9) is located below the circular ring (4) and can shield the opening of the circular ring (4); the sealing plate (9) is connected to the block (8) through a push rod (25).

4. The slurry mixing device for lithium battery production according to claim 2, characterized in that: A plurality of vertically arranged guide rods (10) are arranged on the top of the circular ring (4), and the guide rods (10) extend into the movable block (6) and slide in cooperation with the movable block (6); an adjusting ring (11) coaxially arranged with the circular ring (4) is rotatably mounted on the dosing cylinder (2), and an internally threaded groove ring (12) is arranged on the inner side surface of the adjusting ring (11) located in the dosing cylinder (2); and an externally threaded groove ring (13) threadably engaged with the internally threaded groove ring (12) is arranged on the outer peripheral surface of the movable block (6).

5. The slurry mixing device for lithium battery production according to claim 1, characterized in that: It also includes a feeding pipe (14), the bottom end of which is connected to the feeding port and the top end of which is connected to a feeding hopper (15).

6. The slurry mixing device for lithium battery production according to claim 1, characterized in that: A plurality of supporting legs (16) are arranged at the bottom of the mixing cylinder (1).

7. The slurry mixing device for lithium battery production according to claim 1, characterized in that: A feed hopper (17) is arranged at the top of the mixing cylinder (1), and a discharge valve (18) is arranged at the top of the mixing cylinder (1).

8. The slurry mixing device for lithium battery production according to claim 1, characterized in that: A motor (19) is installed on the top of the mixing drum (1), a stirring shaft (20) connected to the output end of the motor (19) is arranged inside the mixing drum (1), and a plurality of stirring rods (21) are arranged on the stirring shaft (20).

9. The slurry mixing device for lithium battery production according to claim 8, characterized in that: A plurality of bending rods (22) are arranged on the stirring shaft (20), and a scraper (23) which is in contact with the inner wall of the mixing barrel (1) is arranged on the outer side surface of the bending rod (22).

10. The slurry mixing device for lithium battery production according to claim 1, characterized in that: A transparent observation window (24) is provided on the side wall of the mixing cylinder (1).

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