Pole piece wet spraying device
By installing a humidification device on the outside of the oven outlet to spray an aqueous solution and combining it with a visual inspection mechanism to monitor the crack locations, the problem of cracking of thick-coated electrodes during the drying process was solved, achieving the effects of reducing costs and improving production efficiency.
Patent Information
- Application Number
- CN202421121457.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-05-21
AI Technical Summary
In the current technology, thick-coated electrodes are prone to cracking during the drying process of water-based negative electrode slurry, and the use of NMP as a solvent poses health risks and high costs.
A bracket is installed on the outside of the oven outlet, and multiple sprayer assemblies are installed along the axial direction of the bracket. These assemblies are used to spray aqueous solutions onto the surface of the electrode coating. A visual inspection mechanism monitors the crack locations and intelligently controls the spraying position to reduce capillary pressure.
It effectively avoids cracking of the electrode surface coating, reduces production costs, improves production efficiency, and reduces negative environmental impact.
Smart Images
Figure CN223440116U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of lithium battery pole piece manufacturing device technical field, specifically to a kind of pole piece wet device. BACKGROUND
[0002] With the market energy density requirement of lithium ion battery is higher and higher, the thickness of coating is thicker and thicker. In water-based negative electrode slurry, because the surface tension of water is much higher than NMP (N-methyl pyrrolidone), therefore in the drying process of water-based negative electrode slurry, there will be higher capillary pressure, and the negative electrode cracking tendency increases.
[0003] The pole piece of thick coating has a long time from the drying of the bottom of current collector to the surface of pole piece, and the capillary pressure of pole piece surface and bottom coating is greater, and the pole piece out of oven is stacked with external bending stress when passing through the first big wrap angle roller, and the coating surface will produce dry cracking stripe at the first big wrap angle roller after oven.
[0004] The prior art is to add a small amount of NMP to the negative electrode slurry to reduce the surface tension of the slurry to reduce the cracking of the coating. However, since NMP has a mild irritation to the skin, damages the central nervous system, and the cost of NMP solution is high, and if NMP is not completely dried and removed after being added, it may slightly deteriorate the cycle performance of the battery cell, so solving the problem of pure water negative electrode thick coating cracking becomes the key to improving the performance of lithium battery. SUMMARY
[0005] In order to overcome the shortcomings of the prior art, the utility model provides a kind of pole piece wet device that can reduce the cracking of pole piece surface.
[0006] The utility model solves the technical scheme adopted by its technical problem:
[0007] A kind of pole piece wet device, comprising: support at the outside of oven outlet, spray wet ware assembly is arranged on the support, and the spray wet ware assembly is used to spray aqueous solution on the coating surface of pole piece after oven operation.
[0008] The pole piece wet device as described above, the spray wet ware assembly is multiple and is respectively arranged above the two side edges of the coating of pole piece along the axial direction of the support.
[0009] The pole piece wet device as described above, visual detection mechanism is further arranged above the oven outlet, and the visual detection mechanism is used to detect the cracking position of the coating surface of pole piece;
[0010] The outside of oven outlet is further provided with a driving member for driving the spray wet ware assembly to slide along the axial direction of the support, and the driving member is communicatively connected or electrically connected with the visual detection mechanism, and the driving member is used to control the movement of the spray wet ware assembly relative to the coating surface of pole piece.
[0011] The pole piece wetting device as claimed in any one of the preceding claims, wherein the plurality of supports are provided in parallel to the surface of the pole piece coating layer;
[0012] Each of the driving members is connected to each of the visual detection mechanisms one-to-one;
[0013] Each of the driving members can drive the wetting device assembly on each of the supports to move one-to-one.
[0014] The pole piece wetting device as claimed in any one of the preceding claims, wherein the supports are provided in parallel to the surface of the pole piece coating layer;
[0015] The wetting device assembly comprises a fixing clamp, an X-axis adjuster, and a wetting device;
[0016] The fixing clamp is connected to the support, and the fixing clamp is used to connect the wetting device assembly to the support;
[0017] The fixed end of the X-axis adjuster is fixedly connected to the fixing clamp;
[0018] The movable end of the X-axis adjuster is connected to the wetting device;
[0019] The X-axis adjuster is used to drive the wetting device to move in a direction perpendicular to the support.
[0020] The pole piece wetting device as claimed in any one of the preceding claims, wherein an X-axis adjuster and the wetting device are further provided with a wetting device support, one end of the wetting device support is fixedly connected to the movable end of the X-axis adjuster, and the other end of the wetting device support is fixedly connected to the wetting device; the wetting device support can be used to extend the distance between the wetting device and the X-axis adjuster.
[0021] The pole piece wetting device as claimed in any one of the preceding claims, wherein the fixing clamp is rotatably connected to the support, and the fixing clamp is used to drive the wetting device to rotate in the circumferential direction of the support.
[0022] The pole piece wetting device as claimed in any one of the preceding claims, wherein the wetting device can be any one of a pneumatic sprayer, an electric sprayer, a pneumatic spray pen, an electric spray pen, a pneumatic spray gun, and an electric spray gun.
[0023] The pole piece wetting device as claimed in any one of the preceding claims, wherein the wetting device assembly further comprises a water-soluble solution inlet pipe and a sprayer water inlet;
[0024] The sprayer water inlet is in communication with the wetting device, and the water-soluble solution inlet pipe is in communication with the sprayer water inlet;
[0025] The water-solution inlet of the sprayer is used for atomizing the water solution supplied by the water-solution inlet pipe and supplying the atomized water solution into the wet sprayer.
[0026] The water-solution is tap water and / or deionized water.
[0027] The utility model discloses the beneficial effects are:
[0028] The bracket is arranged outside the oven outlet, the wet sprayer assembly is arranged on the bracket, when the pole piece flows out from the oven, the wet sprayer assembly sprays the water solution to the pole piece surface before the pole piece passes through the oven exit roller, the pole piece surface coating is wet, reduces the capillary pressure of the pole piece surface, can avoid the pole piece surface coating cracking. BRIEF DESCRIPTION OF DRAWINGS
[0029] The utility model is further explained below in combination with the drawings and examples.
[0030] Figure 1 It is the schematic diagram of the pole piece wet spraying device using process of the utility model;
[0031] Figure 2 It is one of the structure schematic diagram in example two;
[0032] Figure 3 It is the second structure schematic diagram in example two;
[0033] Figure 4 It is one of the structure schematic diagram in example three;
[0034] Figure 5 It is the second structure schematic diagram in example three;
[0035] Figure 6 It is one of the wet sprayer assembly structure schematic diagram in example two and example three;
[0036] Figure 7 It is the second wet sprayer assembly structure schematic diagram in example two and example three;
[0037] The reference signs in the example are as follows:
[0038] 1-oven, 11-oven outlet, 12-oven inner roller, 13-oven exit roller, 14-crease removing roller, 2-bracket, 3-wet sprayer assembly, 31-fixing clamp, 32-X axis adjuster, 33-wet sprayer, 34-water-solution inlet pipe, 35-wet sprayer bracket, 4-pole piece coating, 36-sprayer water inlet, 5-visual detection mechanism, 6-driving part. DETAILED DESCRIPTION
[0039] The utility model discloses a concept, specific structure and the technical effect produced are clearly, completely described below combining with the embodiment and the drawing, to fully understand the purpose, features and effect of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, and not all embodiments, based on the embodiment of the utility model, the other embodiment obtained by the person skilled in the art without paying creative labor, all belong to the protection scope of the utility model. In addition, all the connections / connection relations involved in the patent do not mean that the components are directly connected, but that a better connection structure can be formed by adding or reducing connecting auxiliary parts according to the specific implementation situation. The various technical features in the utility model creation can be interactively combined without mutual contradiction and conflict.
[0040] Embodiment 1:
[0041] A kind of pole piece sprays wet device, its structure as Figures 2-3 Shown, the pole piece sprays wet device is applied in the pole piece processing system as Figure 1 Shown, the pole piece sprays wet device includes: support 2 at the oven outlet 11 outer side, sprays wet ware assembly 3 at the support 2, the sprays wet ware assembly 3 is used to spray aqueous solution on the surface of pole piece coating 4 after oven operation.
[0042] Referring to Figure 1 , oven 1 is equipped with oven inner roller 12, oven outlet 11 outer side is equipped with out of oven roller 13 and wrinkle removing roller 14, and the pole piece moves towards A direction as Figure 1 Shown under the drive of the oven inner roller 12, out of oven roller 13 and wrinkle removing roller 14.
[0043] Support 2 is arranged at the oven outlet 11 outer side, and sprays wet ware assembly 3 is arranged on the support 2, when the pole piece flows out from the oven, the pole piece is sprayed with aqueous solution on the surface by sprays wet ware assembly 3 before passing through out of oven roller 13, and the pole piece coating 4 on the surface of the pole piece is wetted, the capillary pressure of the pole piece surface 4 is reduced, and the pole piece coating 4 can be avoided to crack.
[0044] More specifically, the aqueous solution is tap water and / or deionized water. Tap water and deionized water are common and readily available water resources, belong to renewable resources, and have better biodegradability and smaller negative impact on the environment. Compared with the price of NMP, the price of tap water and deionized water is relatively low, and the use of tap water and / or deionized water as a solvent can greatly reduce production costs.
[0045] Further, the support 2 is arranged parallel to the surface of the pole piece coating 4.
[0046] Referring to Figures 6-7 , the sprays wet ware assembly 3 includes a fixed clamp 31, an X-axis adjuster 32 and a sprays wet ware 33.
[0047] The fixed clamp 31 is connected with the support 2, and the fixed clamp 31 is used to connect the wet sprayer assembly 3 on the support 2;
[0048] The fixed end of the X-axis adjuster 32 is fixedly connected with the fixed clamp 31;
[0049] The movable end of the X-axis adjuster 32 is connected with the wet sprayer 33;
[0050] The X-axis adjuster 32 is used to drive the wet sprayer 33 to move in a direction perpendicular to the support 2, so as to control the spraying height and spraying range of the water solution, and finely control the distance between the wet sprayer 33 and the surface of the pole piece coating 4.
[0051] Specifically, the X-axis adjuster 32 and the wet sprayer 33 are further provided with a wet sprayer support 35, one end of the wet sprayer support 35 is fixedly connected with the movable end of the X-axis adjuster 32, and the other end of the wet sprayer support 35 is fixedly connected with the wet sprayer 33; the wet sprayer support 35 can be used to lengthen the distance between the wet sprayer 33 and the X-axis adjuster 32, facilitate the installation, disassembly and daily maintenance of the wet sprayer 33, and lengthen the working range of the wet sprayer 33, so that the wet sprayer 33 can cover a larger area and improve the working efficiency of the pole piece wetting device.
[0052] Specifically, the fixed clamp 31 is rotationally connected with the support 2, and the fixed clamp 31 is used to drive the wet sprayer 33 to rotate circumferentially along the support 2; the rotation of the fixed clamp 31 can drive the wet sprayer 33 to rotate, so as to regulate and control the spraying range.
[0053] Specifically, the wet sprayer 33 can be any one of a pneumatic sprayer, an electric sprayer, a pneumatic spray pen, an electric spray pen, a pneumatic spray gun and an electric spray gun. The wet sprayer 33 can atomize the water solution into millimeter-level water droplets or nanometer-level water molecules, so that the pole piece coating 4 is wetted and the environmental humidity is also improved, and the probability of cracking of the pole piece surface 4 is further reduced.
[0054] Specifically, the wet sprayer assembly 3 further comprises a water solution inlet pipe 34 and a sprayer water inlet 36;
[0055] The sprayer water inlet 36 is in communication with the wet sprayer 33, and the water solution inlet pipe 34 is in communication with the sprayer water inlet 36;
[0056] The sprayer water inlet 36 is used to atomize the water solution supplied by the water solution inlet pipe 34 and supply the atomized water solution into the wet sprayer 33; the structure design is simple, and the maintenance cost of the wet sprayer assembly 3 is reduced.
[0057] Embodiment 2
[0058] With reference to Figures 2-3 , the rest of the structure of this embodiment is the same as that of Embodiment 1, except that:
[0059] The wet sprayer assembly 3 is multiple and respectively arranged above the two side edges of the pole piece coating 4 along the axial direction of the support 2.
[0060] In the process of drying the pole piece coating 4, the evaporation speed of the moisture in the edge part of the pole piece coating 4 is faster than that in the middle part of the pole piece coating 4, so the two sides of the pole piece coating 4 are more prone to shrinkage and cracking. The spray center of the wet sprayer assembly 3 is arranged above the two sides of the pole piece coating 4, so that when the wet sprayer assembly 3 is turned on, more water solution is sprayed to the two sides of the pole piece coating 4 than to the middle part of the pole piece coating 4, balancing the capillary pressure of the pole piece coating 4 everywhere to avoid cracking of the pole piece coating 4.
[0061] Embodiment 3
[0062] With reference to Figures 4-5 , the rest of the structure of this embodiment is the same as that of Embodiment 1, except that:
[0063] Further, a visual detection mechanism 5 is further arranged above the oven outlet 11, and the visual detection mechanism 5 is used to detect the cracking position on the surface of the pole piece coating 4;
[0064] A driving member 6 is further arranged outside the oven outlet 11 to drive the wet sprayer assembly 3 to slide along the axial direction of the support 2, and the driving member 6 is in communication connection or electrical connection with the visual detection mechanism 5. The driving member 6 is used to control the movement of the wet sprayer assembly 3 relative to the surface of the pole piece coating 4.
[0065] After the pole piece flows out of the oven 1, the visual detection mechanism 5 monitors the cracking position of the pole piece coating 4 on the entire width of the pole piece, converts the detected cracking position into an electrical signal and transmits it to the controller. The controller (not shown in the figure) controls the driving member 6 to drive the wet sprayer assembly 3 to move to the corresponding position of the cracking position, and sprays water solution to the cracking position on the surface of the pole piece coating 4, so that the dry pole piece coating 4 can be quickly wetted to form good bending toughness, ensuring that the pole piece coating 4 does not crack when passing through the bending roller 13, thereby realizing intelligent monitoring and control of the opening of the wet sprayer assembly 3, improving the automation degree of the pole piece wetting device, and reducing the labor cost and the consumption of water solution.
[0066] Specifically, the visual detection mechanism 5 is a mechanism in conventional technology, including a CCD camera and an image processing system; and the driving member 6 is also a servo motor or a pneumatic cylinder in conventional technology.
[0067] The structure that the driving member 6 drives the wet sprayer assembly 3 to slide axially along the support 2 can be any one of the prior art, and two examples are given below (not shown in the drawings): 1. The support 2 is a lead screw, a first sliding rail is arranged above the oven outlet 11, a first sliding block is arranged on the wet sprayer assembly 3, the first sliding block is in sliding connection with the first sliding rail, the driving member 6 drives the support 2 to rotate, so that the first sliding block drives the wet sprayer assembly 3 to slide axially along the support 2; 2. The support 2 is a second sliding rail, toothed transmission belts are arranged on the upper and lower sides of the second sliding rail, the wet sprayer assembly 3 is fixedly connected with the transmission belts, a transmission gear is fixedly connected to the output section of the driving member 6, the transmission gear is in meshing connection with the toothed transmission belts, so that when the driving member 6 drives the transmission gear to rotate, the wet sprayer assembly 3 on the toothed transmission belts slides axially along the support 2.
[0068] Specifically, the supports 2 are a plurality of, the number of the driving members 6 is the same as the number of the supports 2, and the number of the visual detection mechanisms 5 is the same as the number of the supports 2.
[0069] Each of the driving members 6 is in one-to-one corresponding connection with each of the visual detection mechanisms 5.
[0070] Each of the driving members 6 can drive the wet sprayer assembly 3 on each of the supports 2 to move.
[0071] The plurality of supports 2 can be arranged parallel to the surface of the pole piece coating 4, so that the plurality of visual detection mechanisms 5 can identify a plurality of cracking positions on the surface of the pole piece coating 4 respectively; each of the driving members 6 drives the wet sprayer assembly 3 to move to the corresponding cracking position to spray the aqueous solution, so as to improve the production speed.
[0072] The above is a specific description of the preferred embodiment of the utility model, but the utility model creation is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the present application.
Claims
1. A pole piece wetting device, characterized in that: include: A bracket (2) is arranged outside the oven outlet (11), and a wetting device assembly (3) is arranged on the bracket (2), wherein the wetting device assembly (3) is used to spray the aqueous solution on the surface of the electrode coating (4) after the oven operation; The aqueous solution is tap water and / or deionized water; The wet sprayer assembly (3) is located between the oven outlet (11) and the oven outlet roller (13); The wetting device assembly (3) includes a fixing clamp (31), an X-axis adjuster (32), and a wetting device (33); The fixing clip (31) is connected to the bracket (2), and the fixing clip (31) is used to connect the wetting device assembly (3) to the bracket (2); The fixed end of the X-axis adjuster (32) is fixedly connected to the fixing clamp (31); The movable end of the X-axis adjuster (32) is connected to the wetting device (33); The X-axis adjuster (32) is used to drive the wetting device (33) to move in a direction perpendicular to the bracket (2).
2. The electrode wetting device according to claim 1, characterized in that: The wetting device assembly (3) is in plurality and is respectively arranged above the two side edges of the pole piece coating (4) along the axial direction of the bracket (2).
3. The electrode wetting device according to claim 1, characterized in that: A visual inspection mechanism (5) is further provided above the oven outlet (11), and the visual inspection mechanism (5) is used to detect cracking positions on the surface of the electrode coating (4); A driving member (6) is further provided on the outside of the oven outlet (11) for driving the sprayer assembly (3) to slide axially along the bracket (2). The driving member (6) is communicatively connected or electrically connected to the visual detection mechanism (5). The driving member (6) is used to control the movement of the sprayer assembly (3) relative to the surface of the electrode coating (4).
4. The electrode wetting device according to claim 3, characterized in that: There are multiple supports (2), the number of the driving members (6) is the same as the number of the supports (2), and the number of the visual detection mechanisms (5) is the same as the number of the supports (2); Each of the driving members (6) is connected to each of the visual detection mechanisms (5) in a one-to-one correspondence; Each of the driving members (6) can drive the sprayer assembly (3) on each of the brackets (2) to move in a one-to-one correspondence.
5. The electrode wetting device according to claim 1, characterized in that: The bracket (2) is arranged parallel to the surface of the pole piece coating (4).
6. The electrode wetting device according to claim 1, characterized in that: A wetting spray bracket (35) is further provided between the X-axis adjuster (32) and the wetting sprayer (33), one end of the wetting spray bracket (35) being fixedly connected to the movable end of the X-axis adjuster (32), and the other end of the wetting spray bracket (35) being fixedly connected to the wetting sprayer (33); the wetting spray bracket (35) can be used to extend the distance between the wetting sprayer (33) and the X-axis adjuster (32).
7. The electrode wetting device according to claim 5, characterized in that: The fixing clamp (31) is rotatably connected to the bracket (2), and the fixing clamp (31) is used to drive the wetting device (33) to rotate along the circumference of the bracket (2).
8. The electrode wetting device according to claim 1, characterized in that: The wetting device (33) can be any one of a pneumatic sprayer, an electric sprayer, a pneumatic spray pen, an electric spray pen, a pneumatic spray gun and an electric spray gun.
9. The electrode wetting device according to claim 1, characterized in that: The sprayer assembly (3) further includes an aqueous solution water inlet pipe (34) and a sprayer water inlet (36); The sprayer water inlet (36) is connected to the wetting device (33), and the aqueous solution water inlet pipe (34) is connected to the sprayer water inlet (36); The sprayer water inlet (36) is used to atomize the aqueous solution supplied by the aqueous solution water inlet pipe (34) and supply the atomized aqueous solution to the sprayer (33).