A micrometer block sleeve auxiliary device for ensuring lateral consistency of coating surface density

Abstract

The utility model discloses a micrometer block sleeve auxiliary device for ensuring the lateral consistency of coating surface density. The device comprises a lower die head, an upper die head hinged to the lower die head, a placement cavity provided in the length direction of the upper die head, and a discharge adjustment part located in the placement cavity; the discharge adjustment part comprises a plurality of micrometers fixedly installed in the length direction of the upper die head, a connecting piece arranged at the micrometer adjustment end, a connecting column installed on the connecting piece, a micrometer block connected to the connecting column, and a micrometer block sleeve for wrapping all micrometer blocks; the micrometer block sleeve is located in the placement cavity; when adjusting a single micrometer, the device will not cause large fluctuations in the corresponding areas of adjacent blocks, and also avoids "fault"-type surface density differences; during subsequent treatments such as drying, the electrode piece is in a better state, smoother, and less likely to produce defects such as material dropout.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and in particular relates to a micrometer pressure block sleeve auxiliary device for ensuring the lateral consistency of coating surface density. Background Art

[0002] Coating is an extremely important process in the production of lithium-ion batteries. Its main work is to coat the qualified slurry produced by the slurry mixing process on the foil and dry it through the finished product tank, buffer tank, screw pump, scraper filter, capsule filter, die head, lip and other equipment modules. For lithium-ion batteries, many abnormalities are related to poor control of this process, such as capacity loss / abnormality, short circuit, blank folding and safety issues. The coating equipment mainly has two core components: coating die head and oven. The oven is related to the drying degree and surface state of the pole piece, and the structure of the coating die head is closely related to the uniformity and surface density of the coating. At present, the control of the uniformity and size of the coating surface density is mainly determined by: screw pump speed and pump pressure, die gap spacing, micrometer, etc. Among them, the speed of the screw pump directly determines the volume flow rate of the slurry; the die gap spacing directly determines the coating size; the micrometer directly determines the lateral uniformity of the coating.

[0003] The micrometer is composed of multiple single modules, which are arranged horizontally inside the die head. The cylindrical connection modules of the single micrometers are respectively connected to the top of the die head and are detachably connected to the knob. The clockwise and counterclockwise rotation of the knob drives the downward or upward movement of the single micrometer to achieve the operation of reducing or increasing the surface density in this area. However, due to the inconsistent degree of rotation of the knobs of adjacent micrometers, there is a height difference inside the die head and a 90° angle. Such a height difference causes a fault when the slurry flows inside the die head to the lip and is coated on the foil, resulting in a horizontal fault-like gap in surface density and thickness. Such a gap makes it easy for the electrode to produce material dropout, cracking and other abnormalities during the drying process.

[0004] Therefore, how to ensure that the coating surface density is consistent in the horizontal direction is a problem that needs to be solved at present. Utility Model Content

[0005] The purpose of the utility model is to provide a micrometer pressure block sleeve auxiliary device for ensuring the lateral consistency of the coating surface density, so as to solve the above-mentioned problems existing in the prior art.

[0006] Technical solution: A micrometer block sleeve auxiliary device to ensure the lateral consistency of coating surface density, including:

[0007] A lower die head, an upper die head hinged to the lower die head, a placement cavity provided in the length direction of the upper die head, and a discharge adjustment portion located in the placement cavity;

[0008] The discharge adjustment part includes a plurality of micrometers fixedly mounted in the length direction of the upper die head, a connecting piece provided at the micrometer adjustment end, a connecting column mounted on the connecting piece, a micrometer pressing block connected to the connecting column, and a micrometer pressing block sleeve for wrapping all the micrometer pressing blocks;

[0009] The micrometer pressure block sleeve is located in the placement cavity.

[0010] In a further embodiment, the inner wall of the micrometer pressure block sleeve is provided with a plurality of locking members, and a plurality of positioning members are provided on the micrometer pressure block;

[0011] The locking piece is snap-connected with the positioning piece.

[0012] In a further embodiment, the upper die head is provided with a plurality of through holes in the length direction;

[0013] The connecting column passes through the through hole, and two ends thereof are respectively connected to the connecting piece and the micrometer pressing block.

[0014] In a further embodiment, the micrometer pressure block sleeve has a predetermined deformation capacity;

[0015] When adjacent micrometers reach the highest point and the lowest point respectively, there is still recoverable elastic deformation.

[0016] In a further embodiment, the thickness of the bottom and side surfaces of the micrometer pressure block sleeve does not exceed 1 mm.

[0017] In a further embodiment, the lower die head is provided with a feed pipe, and a material cavity opened on the lower die head;

[0018] One end of the feed pipe is communicated with the material cavity, and the other end is communicated with the feeding part.

[0019] In a further embodiment, a discharge port is provided between the upper die head and the lower die head;

[0020] The placement cavity is located above the material cavity and at the feeding end of the discharge port;

[0021] By adjusting the micrometer, the size of the feed end of the discharge port can be adjusted, thereby adjusting the discharge amount.

[0022] Beneficial effect: The utility model relates to a micrometer block sleeve auxiliary device for ensuring the lateral consistency of the coating surface density. In order to ensure the lateral consistency of the coating surface density, in the coating production process using the micrometer block sleeve, the method of adjusting the surface density is the same as when the micrometer block sleeve is not used, that is, rotating the micrometer to make the micrometer drive the connecting piece to move, and then the moving connecting piece can drive the connecting column to move, so that the moving connecting column can drive the micrometer block to move, and then the micrometer block sleeve can adjust the size of the feed end of the discharge port, and then adjust the discharge amount to complete the coating work. At the same time, because the block sleeve can adjust all The micrometers are combined into a whole, so when a single press block is lifted / pressed down, it will no longer produce a 90° right angle with the adjacent press block at the junction. Instead, the press block is stretched at the junction, thereby presenting a smooth curve to connect the two press blocks. Not only that, the 90° right angle is converted into a smooth curve, which makes the slurry flow in the lateral direction and between the micrometers less obstructed. When a single micrometer is adjusted, it will not cause large fluctuations in the corresponding areas of adjacent press blocks, and also avoids the "fault" type of surface density difference. During subsequent processing such as drying, the electrode state is better, smoother, and less prone to defects such as material falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the utility model.

[0024] Figure 2 It is a schematic diagram of the micrometer pressing block in the utility model.

[0025] Figure 3 It is a schematic diagram of the micrometer pressure block sleeve in the utility model.

[0026] Figure 4 It is a schematic diagram of the micrometer pressing block in the utility model being placed in the micrometer pressing block sleeve.

[0027] Figure 5 It is a front view schematic diagram of the micrometer pressure block (without the pressure block sleeve) in the utility model when it is placed on the die head.

[0028] Figure 6 It is a front view schematic diagram of the micrometer pressure block (pressure block sleeve) in the utility model when it is placed on the die head.

[0029] Figure 7 It is a schematic diagram of applying slurry on foil when no micrometer sleeve is added in the utility model.

[0030] Figure 8 It is a schematic diagram of applying slurry on foil when the utility model is equipped with a micrometer sleeve.

[0031] Fig. 9 It is a front view of the junction of two adjacent pressing blocks inside the die head without / with a micrometer sleeve in the utility model.

[0032] The reference numerals in the figure are: upper die head 1, lower die head 2, feed pipe 3, material cavity 4, discharge port 5, placement cavity 6, discharge adjustment part 7, micrometer pressure block 71, connecting column 72, micrometer pressure block sleeve 73. DETAILED DESCRIPTION

[0033] After the applicant's research and analysis, the reason for this problem (the electrode is prone to dropout, cracking and other abnormalities during the drying process) is that the adjacent micrometers have different heights inside the die due to the inconsistent degree of knob rotation and present a 90° angle. Such a height difference causes the slurry to flow to the lip inside the die and be coated on the foil, resulting in a fault, resulting in a lateral fault-like difference in surface density and thickness, which makes the electrode prone to dropout, cracking and other abnormalities during the drying process. In order to ensure the lateral consistency of the coating surface density, the method of adjusting the surface density during the coating production process using the micrometer pressure block sleeve is the same as when the micrometer pressure block sleeve is not used, that is, the micrometer is rotated to make the micrometer drive the connecting part to move, and then the moving connecting part can drive the connecting column to move, so that the moving connecting part The connecting column can drive the micrometer pressing block to move, so that the micrometer pressing block sleeve can adjust the size of the feed end of the discharge port, and then adjust the discharge amount to complete the coating work. At the same time, since the pressing block sleeve combines all the micrometers into a whole, when a single pressing block is lifted / pressed down, it will no longer produce a 90° right angle with the adjacent pressing block at the junction. Instead, it is converted into a stretching of the pressing block sleeve at the junction position, thereby presenting a smooth curve to connect the two pressing blocks. Not only that, the conversion of the 90° right angle to a smooth curve makes the flow of the slurry in the lateral direction and between the micrometers less obstructed. When a single micrometer is adjusted, it will not cause large fluctuations in the corresponding areas of adjacent pressing blocks, and also avoids the "fault" type of surface density difference. In subsequent processing such as drying, the electrode state is better, smoother, and less prone to defects such as material falling.

[0034] A micrometer block sleeve auxiliary device for ensuring the lateral consistency of coating surface density includes: an upper die head 1, a lower die head 2, a feed pipe 3, a material cavity 4, a discharge port 5, a placement cavity 6, a discharge adjustment part 7, a micrometer block 71, a connecting column 72, and a micrometer block sleeve 73.

[0035] In a further embodiment, in the coating production process without using the micrometer block sleeve 73, if the surface density of a certain area is to be adjusted, the micrometer of the area is adjusted. Since the constant pump speed of the screw pump limits the invariance of the volume flow of the slurry, the lifting / pressing operation of a single micrometer will not only change the surface density of the corresponding area to increase / decrease, but also easily cause the surface density of the coating area corresponding to the adjacent micrometer block 71 to change in the opposite direction, that is, decrease / increase. In addition, due to the right-angle design of the block, when a single block is lifted / pressed up, it will produce a 90° right angle with the adjacent block at the junction (such as Fig. 9 As shown in the figure, this phenomenon not only causes the slurry to have a difference in surface density between the two corresponding areas of the briquette, but also its surface density change is nonlinear and "fault-like". After drying, it appears as vertical stripes (such as Figure 7 As shown in the figure), in severe cases it will cause material falling off, wrinkling or even belt breakage.

[0036] In order to solve the above problems, the device includes a lower die head 2, an upper die head 1 hinged to the lower die head 2, a placement cavity 6 provided in the length direction of the upper die head 1, and a discharge adjustment part 7 located in the placement cavity 6; the discharge adjustment part 7 includes a plurality of micrometers fixedly installed in the length direction of the upper die head 1, a connecting piece arranged at the micrometer adjustment end, a connecting column 72 installed on the connecting piece, a micrometer pressure block 71 connected to the connecting column 72, and a micrometer pressure block sleeve 73 for wrapping all the micrometer pressure blocks 71; the micrometer pressure block sleeve 73 is located in the placement cavity 6; the micrometer is rotated so that the micrometer drives the connecting piece to move, and then the moving connecting piece can drive the connecting column 72 to move, so that the moving connecting column 72 can drive the micrometer pressure block 71 to move, and then the micrometer pressure block sleeve 73 can adjust the size of the feed end of the discharge port 5, and then adjust the discharge amount to complete the coating work. At the same time, since the pressure block sleeve combines all the micrometers into a whole, in a single pressure When the block is lifted / pressed down, it will no longer form a 90° right angle with the adjacent pressing block at the junction. Instead, it will be converted into a stretching of the pressing block sleeve at the junction position, thereby presenting a smooth curve to connect the two pressing blocks. Not only that, the conversion of the 90° right angle into a smooth curve makes the slurry less obstructed in the lateral flow between the micrometers, and will not cause large fluctuations in the corresponding areas of adjacent pressing blocks when adjusting a single micrometer, and also avoids the "fault" type surface density difference; during subsequent treatments such as drying, the electrode state is better, smoother, and less likely to produce defects such as material drop; compared with a coating die that does not use the micrometer pressing block sleeve 73, the micrometer pressing block sleeve 73 improves the flow state of the slurry in the die head, improves the uneven distribution of the slurry when it is coated on the foil, makes the lateral distribution of the surface density more uniform, and reduces the probability of abnormal phenomena such as cracking, dropping, and even breaking of the strip; by rotating the micrometer, the position of the micrometer block sleeve is adjusted, and then the thickness of the corresponding area of ​​the foil is adjusted, that is, the thickness is increased or reduced.

[0037] The inner wall of the micrometer pressure block sleeve 73 is provided with a plurality of locking parts, and a plurality of positioning parts are provided on the micrometer pressure block 71; the locking parts are snap-connected with the positioning parts; through the provided snap-connection mode, the micrometer sleeve can be prevented from falling off, and through the use of the micrometer pressure block sleeve 73, the originally separate micrometer becomes a whole, ensuring its stability, thereby ensuring the integrity of the pressure block sleeve to the pressure block.

[0038] The upper die head 1 is provided with a plurality of through holes in the length direction; the connecting column 72 passes through the through holes, and its two ends are respectively connected to the connecting piece and the micrometer pressing block 71 .

[0039] The micrometer block sleeve 73 has a predetermined deformation capacity; when adjacent micrometers reach the highest point and the lowest point respectively, there is still recoverable elastic deformation; thereby further ensuring the stability of the micrometer block covered by it, and at the same time ensuring that the lateral distribution of the surface density is more uniform during the coating work, reducing the probability of abnormal phenomena such as cracking, falling off, or even breaking of the belt.

[0040] The thickness of the bottom and side surfaces of the micrometer pressure block sleeve 73 does not exceed 1 mm.

[0041] The lower die head 2 is provided with a feed pipe 3 and a material cavity 4 opened on the lower die head 2; one end of the feed pipe 3 is connected to the material cavity 4, and the other end is connected to the feeding part.

[0042] A discharge port 5 is provided between the upper die head 1 and the lower die head 2; the placement cavity 6 is located above the material cavity 4 and at the feed end of the discharge port 5; by adjusting the micrometer, the size of the feed end of the discharge port 5 is adjusted, thereby adjusting the discharge amount.

[0043] Description of working principle: During installation, the cylindrical connections of multiple micrometer blocks 71 arranged laterally inside the upper die 1 are inserted into the through holes inside the upper die 1 in the original order. At this time, it is ensured that the transverse micrometer blocks 71 are completely exposed and all micrometer blocks 71 remain horizontal, and then a micrometer sleeve with an inner length equal to the sum of the lengths of all micrometer transverse blocks is covered thereon, so that the transverse micrometer blocks 71 inside the die become a whole; then, the micrometers equipped with micrometer sleeves are pushed into their respective holes together, and a connecting piece is used to connect the micrometer block 71 and the micrometer at the top of the die, and then the position of the micrometer sleeve is adjusted by the knob, and the micrometer is rotated so that the micrometer drives the connecting piece to move, and then the moving connecting piece can drive the connecting column 72 to move, so that the moving connecting column 72 can drive the micrometer The pressing block 71 moves, so that the micrometer pressing block sleeve 73 can adjust the size of the feed end of the discharge port 5, and then adjust the discharge amount to complete the coating work. At the same time, since the pressing block sleeve combines all the micrometers into a whole, when a single pressing block is lifted / pressed down, it will no longer produce a 90° right angle with the adjacent pressing block at the junction. Instead, it is converted into a stretching of the pressing block sleeve at the junction position, thereby presenting a smooth curve to connect the two pressing blocks. Not only that, the 90° right angle is converted into a smooth curve, which makes the flow of the slurry in the lateral direction and between the micrometers less obstructed. When a single micrometer is adjusted, it will not cause large fluctuations in the corresponding areas of adjacent pressing blocks, and also avoids the "fault" type of surface density difference. During subsequent processing such as drying, the electrode state is better, smoother, and less prone to defects such as material falling.

[0044] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A micrometer block sleeve auxiliary device for ensuring the lateral consistency of coating surface density, characterized in that: include: A lower die head, an upper die head hinged to the lower die head, a placement cavity provided in the length direction of the upper die head, and a discharge adjustment portion located in the placement cavity; The discharge adjustment part includes a plurality of micrometers fixedly mounted in the length direction of the upper die head, a connecting piece provided at the micrometer adjustment end, a connecting column mounted on the connecting piece, a micrometer pressing block connected to the connecting column, and a micrometer pressing block sleeve for wrapping all the micrometer pressing blocks; The micrometer pressure block sleeve is located in the placement cavity.

2. A micrometer block sleeve auxiliary device for ensuring lateral consistency of coating surface density according to claim 1, characterized in that: The inner wall of the micrometer pressure block sleeve is provided with a plurality of locking members, and a plurality of positioning members are provided on the micrometer pressure block; The locking piece is snap-connected with the positioning piece.

3. A micrometer block sleeve auxiliary device for ensuring lateral consistency of coating surface density according to claim 1, characterized in that: The upper die head is provided with a plurality of through holes in the length direction; The connecting column passes through the through hole, and two ends thereof are respectively connected to the connecting piece and the micrometer pressing block.

4. A micrometer block sleeve auxiliary device for ensuring lateral consistency of coating surface density according to claim 1, characterized in that: The micrometer pressure block sleeve has a predetermined deformation capacity; When adjacent micrometers reach the highest point and the lowest point respectively, there is still recoverable elastic deformation.

5. A micrometer block sleeve auxiliary device for ensuring lateral consistency of coating surface density according to claim 1, characterized in that: The thickness of the bottom and side surfaces of the micrometer pressure block sleeve shall not exceed 1 mm.

6. A micrometer block sleeve auxiliary device for ensuring lateral consistency of coating surface density according to claim 1, characterized in that: The lower die head is provided with a feed pipe and a material cavity opened on the lower die head; One end of the feed pipe is communicated with the material cavity, and the other end is communicated with the feeding part.

7. A micrometer block sleeve auxiliary device for ensuring lateral consistency of coating surface density according to claim 6, characterized in that: A discharge port is provided between the upper die head and the lower die head; The placement cavity is located above the material cavity and at the feeding end of the discharge port; By adjusting the micrometer, the size of the feed end of the discharge port can be adjusted, thereby adjusting the discharge amount.

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