A lithium battery negative electrode coating device

Abstract

The utility model discloses a kind of lithium battery negative electrode coating devices, including L type upper shell, z type lower shell, stable baffle, pressing plate, upper coating thickness control device, lower coating thickness control block and cut-off plugging mechanism, the L type upper shell is connected together with z type lower shell and both ends are connected with side sealing plate, L type upper shell and z type lower shell between being provided with material chamber, the stable baffle is connected between L type upper shell and z type lower shell, a plurality of guide holes are set up on the stable baffle, a plurality of the upper coating thickness control device is connected on L type upper shell, the pressing plate is connected on L type upper shell and is used to compress upper coating thickness control device;A kind of lithium battery negative electrode coating device of the utility model, its structure is simple, and it is convenient and practical to be controlled by micrometer of upper coating thickness control device to control the lifting of upper coating thickness control block, reach the distance between upper coating thickness control block and lower coating thickness control block to control the clearance of slurry outflow for accurate control.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery negative electrode coating technology, specifically relating to a lithium battery negative electrode coating device. Background Technology

[0002] The lithium battery negative electrode coating machine is one of the key pieces of equipment in the lithium battery production process. There are two coating methods: comma roller transfer coating and slot extrusion coating. Slot extrusion coating involves supplying a Newtonian or non-Newtonian fluid slurry to a slot die using a metering pump. Under pressure, the slurry is uniformly coated onto the substrate surface from the slot die. This is a high-precision, metered coating method that enables high-speed coating with good coating thickness uniformity, making it suitable for large-scale industrial production. However, slot extrusion coating is generally suitable for overall coating, i.e., coating a single strip, and is difficult to use for coating multiple negative electrodes. Therefore, we provide a lithium battery negative electrode coating device to solve the above problems. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a lithium battery negative electrode coating device, which has a simple structure and is convenient and practical. The upper coating thickness control block is raised and lowered by the micrometer of the upper coating thickness control device to accurately control the distance between the upper coating thickness control block and the lower coating thickness control block so as to control the gap of slurry flow.

[0004] A lithium battery negative electrode coating apparatus includes an L-shaped upper shell, a Z-shaped lower shell, a stabilizing separator, a pressure plate, an upper coating thickness control device, a lower coating thickness control block, and a cutting-off and sealing mechanism. The L-shaped upper shell and the Z-shaped lower shell are connected together and have side sealing plates connected to both ends. A material chamber is provided between the L-shaped upper shell and the Z-shaped lower shell. The stabilizing separator is connected between the L-shaped upper shell and the Z-shaped lower shell and has several material guiding holes. Several upper coating thickness control devices are connected to the L-shaped upper shell. The pressure plate is connected to the L-shaped upper shell and is used to press the upper coating thickness control devices. The cutting-off and sealing mechanism and the lower coating thickness control block are connected to the Z-shaped lower shell. The cutting-off and sealing mechanism is disposed between the lower coating thickness control block and the upper coating thickness control device. A material inlet is provided on the Z-shaped lower shell.

[0005] Preferably, the upper coating thickness control device includes a micrometer, a rotating shaft, and an upper coating thickness control block. The micrometer is connected to the L-shaped upper shell and its measuring end is connected to the rotating shaft. The rotating shaft is movably connected to the upper coating thickness control block.

[0006] Preferably, the adjacent upper coating thickness control blocks are slidably connected.

[0007] Preferably, the cut-off and sealing mechanism includes a partition block and a screw. The partition block is disposed between the upper coating thickness control block and the lower coating thickness control block. A dovetail groove is provided on the partition block. One end of the screw passes through the Z-shaped lower shell and is connected to a turntable disposed in the dovetail groove.

[0008] Preferably, the upper coating thickness control block and the lower coating thickness control block are respectively provided with an upper inclined head and a lower inclined head that engage.

[0009] Preferably, a sealing block is provided between the side sealing plate and the upper coating thickness control block, and a sealing silicone plate is sintered on one side of the sealing block. Beneficial effects

[0010] (1) The present invention provides a lithium battery negative electrode coating device, which is simple in structure, convenient and practical. The upper coating thickness control block is raised and lowered by the micrometer of the upper coating thickness control device, so as to accurately control the distance between the upper coating thickness control block and the lower coating thickness control block in order to control the gap of the slurry flow.

[0011] (2) The present invention provides a lithium battery negative electrode coating device, which uses a screw to adjust the extension and retraction of the partition block between the lower coating thickness control block and the upper coating thickness control block, thereby cutting off part of the slurry output and achieving the purpose of coating multiple negative electrode materials. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the coating device.

[0013] Figure 2 This is a schematic diagram of the upper coating thickness control device;

[0014] 1-L-type upper shell, 2-Z-type lower shell, 3-stabilizing partition, 4-material guide hole, 5-material chamber, 6-pressure plate, 7-upper coating thickness control device, 8-partition block, 9-lower coating thickness control block, 10-dovetail groove, 11-screw, 12-sealing block, 13-sealing silicone plate, 14-side sealing plate, 15-micrometer, 16-rotating shaft, 17-upper coating thickness control block, 18-upper inclined head, 19-lower inclined head. Detailed Implementation

[0015] The embodiments of this utility model are further described below with reference to the accompanying drawings. Example

[0016] like Figures 1 to 2As shown; a lithium battery negative electrode coating device includes an L-shaped upper shell 1, a Z-shaped lower shell 2, a stabilizing separator 3, a pressure plate 6, an upper coating thickness control device 7, a lower coating thickness control block 9, and a cutting-off and sealing mechanism. The L-shaped upper shell 1 and the Z-shaped lower shell 2 are connected together and have side sealing plates 14 connected to both ends. A material chamber 5 is provided between the L-shaped upper shell 1 and the Z-shaped lower shell 2. The stabilizing separator 3 is connected between the L-shaped upper shell 1 and the Z-shaped lower shell 2 and has several material guiding holes 4. Several upper coating thickness control devices 7 are connected to the L-shaped upper shell 1. The pressure plate 6 is connected to the L-shaped upper shell 1 and is used to press the upper coating thickness control devices 7. The cutting-off and sealing mechanism and the lower coating thickness control block 9 are connected to the Z-shaped lower shell 2. The cutting-off and sealing mechanism is located between the lower coating thickness control block 9 and the upper coating thickness control device 7. The Z-shaped lower shell 2 has a material inlet hole; the upper... The coating thickness control device 7 includes a micrometer 15, a rotating shaft 16, and an upper coating thickness control block 17. The micrometer 15 is connected to the L-shaped upper shell 1, and its measuring end is connected to the rotating shaft 16. The rotating shaft 16 is movably connected to the upper coating thickness control block 17. Adjacent upper coating thickness control blocks 17 are slidably connected. The cut-off and sealing mechanism includes a partition block 8 and a screw 11. The partition block 8 is disposed between the upper coating thickness control block 17 and the lower coating thickness control block 9. A dovetail groove 10 is provided on the partition block 8. One end of the screw 11 passes through the Z-shaped lower shell 2 and is connected to a turntable disposed in the dovetail groove 10. The upper coating thickness control block 17 and the lower coating thickness control block 9 are respectively provided with a snap-fit ​​upper inclined head 18 and a lower inclined head 19. A sealing block 12 is disposed between the side sealing plate 14 and the upper coating thickness control block 17. A sealing silicone plate 13 is sintered on one side of the sealing block 12.

[0017] The slurry is introduced into the feed chamber 5 through the feed hole, and then into the space between the lower coating thickness control block 9 and the upper coating thickness control device 7 through the guide hole 4. The slurry is extruded through the gap between the upper inclined head 18 and the lower inclined head 19 of the upper coating thickness control block 17 and the lower coating thickness control block 9, and coated onto the conductive substrate. The rotating shaft 16 is raised and lowered by the micrometer 15, which drives the upper coating thickness control block 17 to rise and fall with high precision. The frame of the micrometer 15 needs to be removed. The position of the partition block 8 is adjusted by rotating the screw 11, so that the partition block 8 rests between the upper coating thickness control block 17 and the lower coating thickness control block 9 and extends to... Between the upper inclined head 18 and the lower inclined head 19, near the closest point between the upper inclined head 18 and the lower inclined head 19, the upper inclined head 18 and the lower inclined head 19 in the sealing part will not discharge slurry; the gap between the side sealing plate 14 and the upper coating thickness control block 17 is sealed by the sealing block 12, and the installation difficulty is reduced by the sealing silicone plate 13 at the same time. After increasing the gap, it is easier to install the sealing block 12. The gap is sealed by the sealing block 12. Since the adjacent upper coating thickness control blocks 17 need to be set tightly, the tolerance of the sliding connection of the adjacent upper coating thickness control blocks 17 needs to be controlled within the tolerance of 0.00 to 0.01 mm.

[0018] The specific embodiments of this utility model have been described in detail above, but they are merely examples, and this utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to this utility model are also within the scope of this utility model. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of this utility model are covered within the scope of this utility model.

Claims

1. A lithium battery negative electrode coating device, characterized in that: It includes an L-shaped upper shell (1), a Z-shaped lower shell (2), a stabilizing partition (3), a pressure plate (6), an upper coating thickness control device (7), a lower coating thickness control block (9), and a cut-off and sealing mechanism. The L-shaped upper shell (1) and the Z-shaped lower shell (2) are connected together and have side sealing plates (14) at both ends. A material chamber (5) is provided between the L-shaped upper shell (1) and the Z-shaped lower shell (2). The stabilizing partition (3) is connected between the L-shaped upper shell (1) and the Z-shaped lower shell (2). 3) Several material guide holes (4) are provided on the upper shell, and several upper coating thickness control devices (7) are connected to the L-shaped upper shell (1). The pressure plate (6) is connected to the L-shaped upper shell (1) and is used to press the upper coating thickness control devices (7). The cut-off and sealing mechanism and the lower coating thickness control block (9) are connected to the Z-shaped lower shell (2). The cut-off and sealing mechanism is set between the lower coating thickness control block (9) and the upper coating thickness control device (7). The Z-shaped lower shell (2) is provided with a material inlet hole.

2. The lithium battery negative electrode coating apparatus as described in claim 1, characterized in that: The upper coating thickness control device (7) includes a micrometer (15), a rotating shaft (16) and an upper coating thickness control block (17). The micrometer (15) is connected to the L-shaped upper shell (1) and its measuring end is connected to the rotating shaft (16). The rotating shaft (16) is movably connected to the upper coating thickness control block (17).

3. The lithium battery negative electrode coating apparatus as described in claim 2, characterized in that: The adjacent upper coating thickness control blocks (17) are slidably connected.

4. The lithium battery negative electrode coating apparatus as described in claim 3, characterized in that: The cut-off and sealing mechanism includes a partition block (8) and a screw (11). The partition block (8) is disposed between the upper coating thickness control block (17) and the lower coating thickness control block (9). A dovetail groove (10) is provided on the partition block (8). One end of the screw (11) passes through the Z-shaped lower shell (2) and is connected to a turntable disposed in the dovetail groove (10).

5. The lithium battery negative electrode coating apparatus as described in claim 4, characterized in that: The upper coating thickness control block (17) and the lower coating thickness control block (9) are respectively provided with an upper inclined head (18) and a lower inclined head (19).

6. The lithium battery negative electrode coating apparatus as described in claim 5, characterized in that: A sealing block (12) is provided between the side sealing plate (14) and the upper coating thickness control block (17), and a sealing silicone plate (13) is sintered on one side of the sealing block (12).

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