Lithium battery positive and negative electrode feeding and coating device

Abstract

The utility model discloses a lithium battery anode and cathode feeding and coating device, which relates to the field of lithium battery base material coating, and comprises a guide roller and a coating die head, the guide roller is used for guiding a base material in a transmission process, a slurry inlet hole and a slurry squeezing groove are arranged in the coating die head, the slurry inlet hole is communicated with the slurry squeezing groove, and the slurry squeezing groove is communicated with the guide roller. The shoving groove is located at the output end of the pulp inlet hole, and the end, close to the outer wall of the guide roller, of the shoving groove is of an opening structure; a blocking mechanism penetrating to the outside of the coating die head is mounted on the inner wall of the shoving tank, the blocking mechanism is used for limiting the width of sprayed slurry, a driving mechanism is mounted above the coating die head, and the driving mechanism is used for driving the blocking mechanism to act. According to the utility model, the adjustable blocking mechanism is arranged, so that the coating width of the coating die head can be adjusted according to the width of a base material, and coating die heads of different models do not need to be replaced.

Description

Technical Field

[0001] The utility model relates to the coating field of lithium battery substrates, in particular to a coating device for positive and negative electrodes of lithium batteries. Background Art

[0002] During the production process of lithium batteries, positive and negative electrode slurries need to be coated on the substrate. In the prior art, a coating machine is generally used for this purpose, and the coating die head is responsible for coating the slurry on the surface of the substrate.

[0003] In the prior art, the size of the battery is inconsistent, and the width of the substrate used changes accordingly. Therefore, the coating width must also be adjusted accordingly. Generally, different types of coating dies are required, and the coating width of a single coating die cannot be adjusted. Utility Model Content

[0004] The purpose of the utility model is to provide a lithium battery positive and negative electrode coating device in order to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lithium battery positive and negative electrode feeding and coating device, comprising a guide roller and a coating die head, wherein the guide roller is used to guide the substrate during the transmission process, and the coating die head is provided with a slurry inlet hole and a slurry extrusion groove inside, wherein the slurry inlet hole is communicated with the slurry extrusion groove, and the slurry extrusion groove is located at the output end of the slurry inlet hole, and the end of the slurry extrusion groove close to the outer wall of the guide roller is an open structure;

[0006] The inner wall of the slurry extrusion tank is equipped with a blocking mechanism that penetrates to the outside of the coating die head, and the blocking mechanism is used to limit the width of the slurry spraying. A driving mechanism is installed above the coating die head, and the driving mechanism is used to drive the blocking mechanism to operate.

[0007] As a further solution of the utility model: the input end of the slurry inlet hole is connected to a slurry inlet pipe, and a manual valve for controlling the outflow of slurry is installed on the slurry inlet pipe.

[0008] As a further solution of the utility model: the driving mechanism includes a fixing frame fixedly mounted on the outer walls of the two slurry inlet pipes, a forward and reverse motor is installed on the top of the fixing frame, the output end of the forward and reverse motor is connected to a driving gear, and a passive gear is meshed on the outer periphery of the driving gear.

[0009] As a further solution of the utility model: the blocking mechanism includes a bidirectional screw that is interference-fitted on the inner circumference of the passive gear, both ends of the outer wall of the bidirectional screw are threadedly connected with connecting plates, a push rod is fixedly installed below one end of the two connecting plates close to each other, one end of the push rod passes through the coating die head and extends to the inside of the slurry extrusion tank, and the end of the push rod located inside the slurry extrusion tank is connected to a blocking plate;

[0010] The outer wall of the baffle plate is consistent with the inner circumference of the pulp squeezing groove.

[0011] As a further solution of the utility model: fixing ears are fixedly installed at both ends of the top of the coating die head, and the bidirectional screw is rotatably connected to the fixing ears.

[0012] As a further solution of the utility model: the outer walls of the bidirectional screw are respectively formed with positive threads and negative threads at both ends, one of the connecting plates is provided with an internal thread engaged with the positive thread, and the other connecting plate is provided with an internal thread engaged with the negative thread.

[0013] As a further solution of the utility model: a circular hole for axial sliding of the push rod is provided on the coating die head, and a sealing member is provided at the contact position between the outer periphery of the blocking plate and the slurry extrusion groove.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. By setting an adjustable blocking mechanism, the coating width of the coating die head can be adjusted according to the width of the substrate, without the need to replace different models of coating die heads. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 For the utility model Figure 1 A partial enlarged view of the middle part;

[0018] Figure 3 It is a schematic diagram of the internal structure of the coating die head of the utility model;

[0019] Figure 4 For the utility model Figure 3 A partial enlarged view of point B in the middle.

[0020] In the figure: 1. guide roller; 2. substrate; 3. coating die head; 4. fixing ear; 5. bidirectional screw; 6. connecting plate; 7. push rod; 8. fixing frame; 9. slurry inlet pipe; 10. passive gear; 11. driving gear; 12. forward and reverse motor; 13. slurry inlet hole; 14. manual valve; 15. slurry extrusion groove; 16. blocking plate. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1 to Figure 4 In an embodiment of the utility model, a lithium battery positive and negative electrode loading and coating device comprises a guide roller 1 and a coating die head 3. The guide roller 1 is used to guide the substrate 2 during the transmission process. A slurry inlet hole 13 and a slurry extrusion groove 15 are provided inside the coating die head 3. The slurry inlet hole 13 is communicated with the slurry extrusion groove 15, and the slurry extrusion groove 15 is located at the output end of the slurry inlet hole 13. The end of the slurry extrusion groove 15 close to the outer wall of the guide roller 1 is an open structure; a blocking mechanism penetrating to the outside of the coating die head 3 is installed on the inner wall of the slurry extrusion groove 15, and the blocking mechanism is used to limit the width of the slurry sprayed out. A driving mechanism is installed above the coating die head 3, and the driving mechanism is used to drive the blocking mechanism to operate. The input end of the slurry inlet hole 13 is connected to a slurry inlet pipe 9, and a manual valve 14 for controlling the outflow of slurry is installed on the slurry inlet pipe 9.

[0023] In this embodiment: first, the driving mechanism is started according to the width of the substrate, and the blocking mechanism is adjusted so that the spacing between the two blocking mechanisms matches the width of the substrate, and then the corresponding manual valve 14 is closed, and then the spiral feeding pump connected to the slurry inlet pipe 9 is started to input the slurry into the slurry inlet hole 13 through the slurry inlet pipe 9, and the slurry enters the slurry squeezing groove 15 from the slurry inlet hole 13, and then is coated on the surface of the substrate 2 through the opening of the slurry squeezing groove 15.

[0024] Please refer to Figure 1 and Figure 2 The driving mechanism includes a fixing frame 8 fixedly mounted on the outer walls of the two pulp inlet pipes 9, a forward and reverse motor 12 is mounted on the top of the fixing frame 8, an output end of the forward and reverse motor 12 is connected to a driving gear 11, and a passive gear 10 is meshed on the outer periphery of the driving gear 11.

[0025] In this embodiment, by starting the forward and reverse motor 12, the forward and reverse motor 12 drives the driving gear 11 to rotate, and the rotating driving gear 11 drives the driven gear 10 to rotate. At this time, the rotation direction of the driven gear 10 is opposite to that of the driving gear 11.

[0026] Please refer to Figure 3 and Figure 4The blocking mechanism includes a bidirectional screw 5 which is interference-fitted on the inner circumference of the passive gear 10, and both ends of the outer wall of the bidirectional screw 5 are threadedly connected with connecting plates 6. A push rod 7 is fixedly installed below one end of the two connecting plates 6 that are close to each other. One end of the push rod 7 passes through the coating die 3 and extends to the inside of the slurry extrusion groove 15. The end of the push rod 7 located inside the slurry extrusion groove 15 is connected to a blocking plate 16; the outer wall of the blocking plate 16 coincides with the inner circumference of the slurry extrusion groove 15.

[0027] In this embodiment, the driven gear 10 rotates to drive the bidirectional screw 5 connected thereto to rotate. When the bidirectional screw 5 rotates, it drives the two connecting plates 6 to move toward or in the opposite direction. The two connecting plates 6 push the push rod 7 connected thereto to move. The push rod 7 drives the two blocking plates 16 to move toward or in the opposite direction, so as to adjust the width of the slurry sprayed.

[0028] It should be noted that after the positions of the two blocking plates 16 are adjusted, the manual valve 14 located outside the two blocking plates 16 (ie, the manual valve 14 located outside between the two blocking plates 16 ) is closed.

[0029] Please refer to the figure in particular. Fixing ears 4 are fixedly installed at both ends of the top of the coating die head 3, and the bidirectional screw 5 is rotatably connected to the fixing ears 4.

[0030] In this embodiment, the connection between the bidirectional screw 5 and the fixing ear 4 is rotatably connected via a bearing, which can reduce the friction force during the rotation of the bidirectional screw 5.

[0031] Please refer to Figure 1 The two ends of the outer wall of the bidirectional screw 5 are respectively formed with a positive thread and a negative thread, an inner part of one connecting plate 6 is provided with an internal thread engaged with the positive thread, and an inner part of the other connecting plate 6 is provided with an internal thread engaged with the negative thread.

[0032] In this embodiment, during the rotation of the bidirectional screw 5, the two connecting plates 6 can move toward or away from each other through the internal threads formed therein.

[0033] Please refer to Figure 4 The coating die head 3 is provided with a circular hole for the push rod 7 to slide axially, and a sealing member is provided at the contact position between the outer periphery of the blocking plate 16 and the slurry squeezing groove 15 .

[0034] In this embodiment: the sealing member improves the sealing performance of the contact position between the two, thereby preventing the slurry from overflowing from the gap between the two.

[0035] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lithium battery positive and negative electrode coating device, comprising a guide roller (1) and a coating die head (3), wherein the guide roller (1) is used to guide a substrate (2) during transmission, and is characterized in that: The coating die head (3) is provided with a pulp inlet hole (13) and a pulp squeezing groove (15) inside, the pulp inlet hole (13) is communicated with the pulp squeezing groove (15), and the pulp squeezing groove (15) is located at the output end of the pulp inlet hole (13), and the end of the pulp squeezing groove (15) close to the outer wall of the guide roller (1) is in an open structure; The inner wall of the slurry extrusion groove (15) is equipped with a blocking mechanism that penetrates to the outside of the coating die head (3), and the blocking mechanism is used to limit the width of the slurry spraying. A driving mechanism is installed above the coating die head (3), and the driving mechanism is used to drive the blocking mechanism to operate.

2. A lithium battery positive and negative electrode coating device according to claim 1, characterized in that: The input end of the slurry inlet hole (13) is connected to a slurry inlet pipe (9), and a manual valve (14) for controlling the outflow of slurry is installed on the slurry inlet pipe (9).

3. A lithium battery positive and negative electrode coating device according to claim 2, characterized in that: The driving mechanism comprises a fixing frame (8) fixedly mounted on the outer walls of the two slurry inlet pipes (9), a forward and reverse motor (12) being mounted on the top of the fixing frame (8), an output end of the forward and reverse motor (12) being connected to a driving gear (11), and a driven gear (10) being meshed on the outer periphery of the driving gear (11).

4. A lithium battery positive and negative electrode coating device according to claim 3, characterized in that: The blocking mechanism comprises a bidirectional screw (5) interference-fitted on the inner circumference of the passive gear (10), both ends of the outer wall of the bidirectional screw (5) are threadedly connected with connecting plates (6), a push rod (7) is fixedly installed below the ends of the two connecting plates (6) close to each other, one end of the push rod (7) passes through the coating die head (3) and extends to the inside of the slurry extrusion groove (15), and the end of the push rod (7) located inside the slurry extrusion groove (15) is connected to a blocking plate (16); The outer wall of the blocking plate (16) matches the inner circumference of the squeezing groove (15).

5. A lithium battery positive and negative electrode coating device according to claim 4, characterized in that: Both ends of the top of the coating die head (3) are fixedly mounted with fixing ears (4), and the bidirectional screw (5) is rotatably connected to the fixing ears (4).

6. A lithium battery positive and negative electrode coating device according to claim 5, characterized in that: The two ends of the outer wall of the bidirectional screw (5) are respectively formed with a positive thread and a negative thread, one of the connecting plates (6) is provided with an internal thread engaged with the positive thread, and the other connecting plate (6) is provided with an internal thread engaged with the negative thread.

7. A lithium battery positive and negative electrode coating device according to claim 6, characterized in that: The coating die head (3) is provided with a circular hole for the push rod (7) to slide axially, and a sealing member is provided at the contact position between the outer periphery of the blocking plate (16) and the slurry squeezing groove (15).

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