Lithium battery coating and baking anti-curling device

Abstract

The utility model relates to a lithium battery coating and baking anti-curling device, which comprises two tuyere assemblies, the two tuyere assemblies are respectively arranged above and below a pole piece in a baking oven, each tuyere assembly comprises a plurality of tuyeres arrayed along the front, back, left and right directions of the pole piece, the tuyeres are externally connected with an air pipe, and a heater and a fan are arranged on the air pipe; distance sensors located on the side edges and / or below the pole pieces and infrared moisture testers located on the side edges of the pole pieces are arranged on the two corresponding outer sides between every two adjacent rows of tuyeres in the front-back direction, the distance sensors and the infrared moisture testers are connected with a controller, and the controller is connected with the heater and the fan. The device can detect the hemming condition of the pole piece in real time and adjust the drying air supply angle, temperature and wind power, so that hemming of the pole piece is effectively controlled.

Description

Technical Field

[0001] The utility model relates to a lithium battery baking device, in particular to a device for preventing curling of lithium battery coating during baking. Background Art

[0002] In the production and manufacturing of lithium batteries, the process of uniformly coating the prepared slurry on a foil and drying it is called coating. Coating is one of the most critical processes in lithium battery manufacturing. In the prior art, generally, a coating machine is used to coat the prepared slurry on a continuously moving foil. After the electrode sheet is coated with the slurry, it enters an oven for drying. After being fully dried, the electrode sheet is wound up at the tail of the coating machine. However, when using a relatively thin aluminum foil and a relatively large surface density, when the electrode sheet passes through the oven for drying, the two ends of the electrode sheet will curl. Since the nozzle blows air vertically for drying, the slurry in the curled area cannot be fully dried after passing through the oven, resulting in poor coating on the surface when the electrode sheet is wound up and affecting the coating effect. Summary of the Invention

[0003] The utility model provides a device for preventing curling of lithium battery coating during baking, which can detect the curling condition of the electrode sheet in real time and adjust the drying air supply angle, temperature, and wind force.

[0004] The technical solution adopted by the utility model is as follows: A device for preventing curling of lithium battery coating during baking includes two air nozzle assemblies, which are respectively arranged above and below the electrode sheet in the oven. Each air nozzle assembly includes a plurality of air nozzles arranged in an array along the front-back and left-right directions of the electrode sheet. The air nozzles are externally connected to air ducts, and heaters and blowers are arranged on the air ducts. On the two outer sides corresponding to every two adjacent columns of air nozzles in the front-back direction, there are respectively a distance sensor located on the side and / or below the side of the electrode sheet and an infrared moisture tester located on the side of the electrode sheet. The distance sensor and the infrared moisture tester are connected to a controller, and the controller is connected to the heater and the blower.

[0005] A device for preventing curling of lithium battery coating during baking includes two air nozzle assemblies, which are respectively arranged above and below the electrode sheet in the oven. Each air nozzle assembly includes a plurality of air nozzles arranged in an array along the front-back and left-right directions of the electrode sheet. The air nozzles are externally connected to air ducts, and heaters and blowers are arranged on the air ducts. On the two outer sides corresponding to every two adjacent columns of air nozzles in the front-back direction, there are respectively distance sensors located on the side and / or below the side of the electrode sheet, and on the two outer sides corresponding to each column of air nozzles, there are respectively infrared moisture testers located on the side of the electrode sheet. The distance sensor and the infrared moisture tester are connected to a controller, and the controller is connected to the heater and the blower.

[0006] A lithium battery coating baking anti-curling device, comprising two nozzle assemblies which are respectively arranged above and below the electrode sheet in the oven. Each nozzle assembly includes a plurality of nozzles arrayed in the front-back and left-right directions of the electrode sheet. The nozzles are externally connected to air ducts, and heaters and blowers are arranged on the air ducts; distance sensors and infrared moisture testers located on the side edges of the electrode sheet are respectively arranged on the two outer sides corresponding to every two adjacent columns of nozzles in the front-back direction. The distance sensors and infrared moisture testers are connected to a controller, and the controller is connected to the heaters and blowers; each column of nozzles in the left-right direction is divided into left and right nozzle groups. Each nozzle group includes a plurality of nozzles, a nozzle mounting seat, a nozzle rotating rod, a nozzle driving rod and a nozzle driving cylinder. The nozzle is rotatably connected to the nozzle mounting seat through a connecting shaft and then connected to the lower end of the nozzle rotating rod. The nozzle rotating rods connected by a plurality of nozzles are integrally hinged to the horizontally arranged nozzle driving rod. The cylinder body of the nozzle driving cylinder is rotatably hinged to the oven, and the rod joint of the nozzle driving cylinder is hinged to the nozzle driving rod. The nozzle driving cylinder is externally connected to a gas supply solenoid valve, and the gas supply solenoid valve is connected to the controller.

[0007] The distance sensor is a laser displacement sensor.

[0008] The beneficial effects of the present utility model are:

[0009] 1. By adopting two nozzle assemblies to simultaneously blow air and bake the upper and lower parts of the electrode sheet during transportation in the oven, it helps to improve the drying speed, and at the same time ensures uniform and stable heating and baking of the upper and lower parts of the electrode sheet, reducing the phenomenon of curling on one side or both sides.

[0010] 2. By arranging distance sensors between every two adjacent columns of nozzles, after blowing air and baking through any column of nozzles, when the side edge of the electrode sheet curls, the distance sensor detects the curling signal. After exceeding the allowable value, it is controlled by the controller. For example, if the upper and lower distance sensors detect that the curling is upward, the air supply volume and / or air supply temperature of the upper nozzles are controlled to decrease. The air supply volume and air supply temperature are controlled by the blower and the heater. Otherwise, the lower nozzles are controlled to be adjusted; at the same time, the air supply volume and / or air supply temperature of the nozzles in the column behind any column of nozzles are controlled to increase to correct the curling, which helps to ensure that the electrode sheet finally sent out of the oven has no curling or the curling degree is within the allowable range.

[0011] 3. By arranging infrared moisture testers outside each column of nozzles, the moisture of the slurry on the electrode sheet can be monitored in real time. In cooperation with the curling control situation, the air supply volume and / or air supply temperature of the subsequent multiple columns of nozzles are adjusted to ensure that the slurry on the electrode sheet finally sent out of the oven is fully dried, which helps to improve the drying stability of the electrode sheet.

[0012] 4. The angle adjustment of the air nozzle is controlled by the controller to control the air supply solenoid valve. The air supply solenoid valve drives the air nozzle driving cylinder, the air nozzle driving cylinder pushes the air nozzle driving rod, and the air nozzle driving rod pushes the glued air nozzle rotating rod, so that the air nozzle rotating rod drives the air nozzle to rotate around the inserted air nozzle mounting seat, dividing the air nozzles in each column into left and right air nozzle groups, which can be adjusted separately to meet the possible air supply angle adjustment in the case of slurry drying and curling on both sides. When curling occurs, the curling can also be corrected by adjusting the air nozzle angle. Brief Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the present utility model;

[0014] Figure 2 It is a schematic structural diagram of a single row of air nozzles of the present utility model.

[0015] In the figure: oven 1, front roller 2, rear roller 3, electrode sheet 4, air nozzle 5, air nozzle mounting seat 6, air nozzle rotating rod 7, air nozzle driving rod 8, air nozzle driving cylinder 9, air supply solenoid valve 10, controller 11, air duct 12, heater 13, blower 14, distance sensor 15, infrared moisture tester 16. Detailed Description of the Embodiment

[0016] The following is further described with reference to the drawings.

[0017] Figure 1-2 As shown: A lithium battery coating baking anti - curling device, the electrode sheet 4 is fed into the oven 1 and is conveyed by the front and rear rollers 2 and 3 for drying operation. A plurality of air nozzles 5 are arranged in an array in the front - rear and left - right directions of the electrode sheet above and below the electrode sheet 4 in the oven. The air nozzles 5 are externally connected to the air duct 12, and a heater 13 and a blower 14 are arranged on the air duct 12. Distance sensors 15 are arranged on the upper and lower sides of the side edges of the electrode sheet 4 on the outer sides corresponding to every two adjacent columns of air nozzles in the front - rear direction. Infrared moisture testers 16 are arranged on the outer sides corresponding to each column of air nozzles on the side edges of the electrode sheet 4. The infrared moisture testers 16, distance sensors 15 are connected to the controller 11, and the controller 11 is connected to the heater 13 and the blower 14. Each column of air nozzles 5 is divided into two symmetrically left - and - right air nozzle groups. The air nozzles of each air nozzle group are rotatably inserted through the air nozzle mounting seat 6 through a connecting shaft and then connected to the lower end of the air nozzle rotating rod 7. The air nozzle rotating rods 7 connected by a plurality of air nozzles are integrally hinged on the horizontally arranged air nozzle driving rod 8. The cylinder body of the air nozzle driving cylinder 9 is rotatably hinged on the oven 1, the rod joint of the air nozzle driving cylinder 9 is hinged on the air nozzle driving rod 8, the air nozzle driving cylinder 9 is externally connected to the air supply solenoid valve 10, and the air supply solenoid valve 10 is connected to the controller 11.

[0018] In this embodiment, the air duct adopts centralized air supply to the air nozzles, and each air nozzle is equipped with an independent air valve to control the air volume, or an independent heater to control the air supply temperature. This technology is the prior art.

Claims

1. A lithium battery coating and baking anti-curling device, comprising two air nozzle assemblies, which are respectively arranged above and below the pole piece in the oven, and the air nozzle assembly includes a plurality of air nozzles arrayed along the front and back and left and right directions of the pole piece, and the air nozzle is externally connected to an air duct, and a heater and a fan are arranged on the air duct, characterized in that: The two outer sides corresponding to each two adjacent rows of nozzles in the front-to-back direction are provided with distance sensors located on and / or below the side of the pole piece and an infrared moisture tester located on the side of the pole piece. The distance sensor and the infrared moisture tester are connected to the controller, and the controller is connected to the heater and the fan.

2. A lithium battery coating and baking anti-curling device, comprising two air nozzle assemblies, which are respectively arranged above and below the pole piece in the oven, and the air nozzle assembly includes a plurality of air nozzles arrayed along the front and back and left and right directions of the pole piece, and the air nozzle is externally connected to an air duct, and a heater and a fan are arranged on the air duct, characterized in that: Distance sensors located on and / or below the side of the pole piece are arranged on the corresponding outer sides between each two adjacent rows of air nozzles in the front-to-back direction, and infrared moisture testers located on and / or below the side of the pole piece are arranged on the corresponding outer sides of each row of air nozzles. The distance sensor and the infrared moisture tester are connected to the controller, and the controller is connected to the heater and the fan.

3. A lithium battery coating and baking anti-curling device, comprising two air nozzle assemblies, which are respectively arranged above and below the pole piece in the oven, and the air nozzle assembly includes a plurality of air nozzles arrayed along the front and back and left and right directions of the pole piece, and the air nozzle is externally connected to an air duct, and a heater and a fan are arranged on the air duct, characterized in that: The two outer sides corresponding to each two adjacent rows of air nozzles in the front-to-back direction are provided with distance sensors and infrared moisture testers located on and / or below the side edges of the pole pieces. The distance sensors and infrared moisture testers are connected to a controller, and the controller is connected to a heater and a fan; each row of air nozzles in the left-to-right direction is divided into left and right air nozzle groups, and the air nozzle groups include multiple air nozzles, an air nozzle mounting seat, an air nozzle rotating rod, an air nozzle driving rod and an air nozzle driving cylinder. The air nozzles can be rotatably connected to the air nozzle mounting seat and then connected to the lower end of the air nozzle rotating rod via a connecting shaft. The air nozzle rotating rods to which the multiple air nozzles are connected are integrally hinged on the horizontally arranged air nozzle driving rod, the cylinder body of the air nozzle driving cylinder is rotatably hinged on the oven, the joint of the air nozzle driving cylinder is hinged on the air nozzle driving rod, the air nozzle driving cylinder is externally connected to an air supply solenoid valve, and the air supply solenoid valve is connected to the controller.

4. A lithium battery coating and baking anti-curling device according to claim 1, 2 or 3, characterized in that: The distance sensor is a laser displacement sensor.

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