Drying equipment for battery diaphragm coating

Abstract

The utility model relates to drying equipment, in particular to drying equipment for battery diaphragm coating. The drying equipment for battery diaphragm coating comprises an outer shell, an inner shell, a first partition plate and the like. An inner shell is fixedly connected into the outer shell, and a first partition plate is fixedly welded to the right portion in the inner shell. According to the utility model, the heating device for blowing out heat flow is arranged and matched with the infrared device to heat and dry a diaphragm coating by taking hot air transmitted by the heating device as a heat carrier, and the characteristics of strong penetrating power and high heat efficiency of infrared radiation are utilized, so that the energy consumption is reduced, the temperature difference and the shielding effect are effectively overcome, and the production efficiency is improved. Uneven heating of the diaphragm during drying is avoided; according to the utility model, the diaphragm is cooled through the cooling device, so that the following working conditions such as subsequent detection, analysis, storage and the like are influenced while the diaphragm absorbs moisture to be damped and the quality of a coating is influenced when the diaphragm absorbs cold moisture in air to be cooled after the high-temperature diaphragm is conveyed out of the equipment is avoided.

Description

Technical Field

[0001] The utility model relates to a drying device, in particular to a drying device for coating a battery diaphragm. Background Art

[0002] The battery separator is an important component in the battery. It can effectively isolate the electrodes, prevent short circuits and mixing of electrolytes, and ensure the safe and stable operation of the battery.

[0003] The diaphragm coating material is generally a polymer material, which can be polypropylene, polyamide, polyvinyl fluoride, etc. These materials have good chemical stability and corrosion resistance, and can effectively resist the high temperature, high pressure and chemical reaction of lithium-ion batteries. The Chinese patent with patent application number CN202220030523.0 discloses a drying device for lithium battery diaphragm coating, including a box, the lower end of the box is fixedly connected to a motor, the output shaft of the motor is fixedly connected to a rotating rod, the upper end of the rotating rod is fixedly connected to a placement plate, the inner bottom wall of the box is fixedly connected to a temperature sensor, the upper end of the box is fixedly connected to a suction fan, one side of the suction fan is fixedly connected to an air duct, one side of the air duct is fixedly connected to a hot air box, the inside of the hot air box is fixedly connected to a plurality of heating rods, the lower end of the hot air box is fixedly connected to an outlet pipe, and the lower end of the outlet pipe is fixedly connected to a main air duct. The device will not have unstable temperature during drying, which improves the stability of drying. However, the device uses a hot air device when drying the diaphragm coating, and there is no other auxiliary heating device. The hot air drying system has a large flow resistance in the equipment, and a high-pressure or medium-pressure fan must be used, which consumes a lot of power.

[0004] In view of this, the utility model provides a kind of drying equipment for battery diaphragm coating which provides hot air device and infrared heating device to cooperate to dry the diaphragm coating layer, and uses the flow transmitted by the hot air heating device as the heat carrier for heating through the infrared device, and utilizes the characteristics of strong penetrating power and high thermal efficiency of infrared radiation to save energy while effectively overcoming the temperature difference and shielding effect, so as to avoid uneven heating of the diaphragm during drying, which affects the coating quality. Utility Model Content

[0005] In order to overcome the shortcomings of the device using a hot air device to dry the diaphragm coating without other auxiliary heating devices, the hot air drying system has a large flow resistance in the equipment, and a high-pressure or medium-pressure fan must be used, resulting in high energy consumption. The purpose is to provide a battery diaphragm coating drying device that provides a hot air device and an infrared heating device to dry the diaphragm coating layer, and uses an infrared device to heat the flow transmitted by the hot air heating device as a heat carrier, and utilizes the characteristics of infrared radiation with strong penetrating power and high thermal efficiency to save energy while effectively overcoming temperature differences and shielding effects, thereby avoiding uneven heating of the diaphragm during drying and affecting the coating quality.

[0006] The technical implementation scheme of the utility model is: a drying device for coating a battery diaphragm, comprising an outer shell, an inner shell, a partition plate 1, a partition plate 2, a heating device, a heat flow pipeline, an infrared device, a conveying roller, a feed roller group and a winder, wherein the inner shell is fixedly connected with the outer shell, a partition plate 1 is fixedly welded on the right part of the inner shell, a partition plate 2 is fixedly welded on the left part of the inner shell, a heating device is installed on the upper part of the inner shell, a heat flow pipeline is symmetrically arranged on the front and rear of the front of the heating device, the heat flow pipeline is connected with the heating device, and the heat flow pipelines are all penetrated into the inner shell, two infrared devices are arranged on the front and rear sides of the inner shell, and the infrared devices are all installed in the space divided between the partition plate 1 and the partition plate 2 on the inner shell, four conveying rollers are rotatably connected in the inner shell, a feed roller group is arranged on the upper left side of the inner shell, the feed roller group consists of a support frame and two rotating rollers, the rotating roller is rotatably connected to the support frame, a winder is fixedly installed on the lower left part of the outer shell, and the winder consists of a motor and a film rolling roller.

[0007] Optionally, a cooling device and a metal guide plate are also included. The metal guide plate is fixedly connected to the left part of the inner shell, and the cooling device is installed on the metal guide plate.

[0008] Optionally, it also includes a fixed rod and a rotating frame, the fixed rod is symmetrically connected to the left side of the upper part of the inner shell body, and the rotating frame is rotatably arranged between the fixed rods, and the rotating frame consists of a mounting frame and a film pressing roller.

[0009] Optionally, the inner shell, partition one and partition two have good thermal insulation performance.

[0010] Optionally, a plurality of small holes are opened on the heat flow pipe.

[0011] Optionally, the outer shell is provided with an opening to facilitate air circulation when the heating device is working.

[0012] The utility model has the following advantages:

[0013] 1. The utility model provides a heating device for blowing out heat flow, cooperates with an infrared device to heat the membrane coating with the hot air transmitted by the heating device as a heat carrier, and utilizes the characteristics of strong infrared radiation penetration and high thermal efficiency to save energy while effectively overcoming the temperature difference and shielding effect, thereby avoiding uneven heating of the membrane during drying and affecting the coating quality.

[0014] 2. The utility model cools down the diaphragm through the cooling device to avoid the diaphragm absorbing cold and humid air in the air to cool down after the high-temperature diaphragm is transmitted out of the equipment, causing the rear diaphragm to absorb water vapor and become damp, which affects the coating quality and affects the subsequent testing, analysis, storage and other working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0016] Figure 2 It is a cross-sectional view of the utility model.

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the drying mechanism of the utility model.

[0018] Figure 4 This is a schematic diagram of the diaphragm conveying route of the utility model.

[0019] The meanings of the reference numerals in the figure are: 1: outer shell, 2: inner shell, 3: partition one, 4: partition two, 5: heating device, 6: heat flow pipe, 7: infrared device, 8: conveying roller, 9: feed roller group, 10: winder, 11: fixed rod, 12: rotating frame, 13: cooling device, 14: metal guide plate. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail with reference to the accompanying drawings. It is hereby stated that the directional words such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the utility model are only based on the accompanying drawings of the utility model, and are not specific limitations of the utility model.

[0021] Example 1: A drying device for coating a battery separator, such as Figure 1-4As shown, it includes an outer shell 1, an inner shell 2, a partition 1 3, a partition 2 4, a heating device 5, a heat flow pipe 6, an infrared device 7, a conveying roller 8, a feed roller group 9 and a winder 10. The inner shell 2 is fixedly connected to the outer shell 1, the partition 1 3 is fixedly welded on the right part of the inner shell 2, and the partition 2 4 is fixedly welded on the left part of the inner shell 2. The partition 1 3 and the partition 2 4 are both provided with openings through which the diaphragm can pass. The partition 1 3 and the partition 2 4 separate a drying area in the inner shell 2, and the coating applied on the diaphragm is dried and cured in this area. A heating device 5 is installed on the upper part of the inner shell 2, and the heat flow pipes 6 are symmetrically arranged on the front and rear of the heating device 5. The heat flow pipes 6 are connected to the heating device 5, and the heat flow pipes 6 are all penetrated into the inner shell 2 to continuously send the hot air produced in the heating device into the drying area. The front and rear sides of the inner shell 2 are Two infrared devices 7 are provided, and the infrared devices 7 are installed in the drying area between the partition 1 3 and the partition 2 4 on the inner shell 2. The infrared device 7 generates heatable infrared radiation, which cooperates with the hot air generated by the heating device 5 to provide drying heat energy in a more energy-saving manner. Four conveying rollers 8 are rotatably connected in the inner shell 2 to change the conveying direction of the diaphragm in the equipment. A feed roller group 9 is provided on the upper left side of the inner shell 2. The feed roller group 9 consists of a support frame and two rotating rollers. The diaphragm conveyed from the outside will pass through the middle of the two rotating rollers. The rotating rollers are rotatably connected to the support frame. A winder 10 is fixedly installed on the lower left part of the outer shell 1. The winder 10 consists of a motor and a film rolling roller. The rotation of the motor drives the film rolling roller to rotate, so as to roll up the dried diaphragm and at the same time pull the coated diaphragm to be transmitted to the left in the equipment.

[0022] Before the drying process is started, the heating device 5 and the infrared device 7 are turned on. The heat flow pipe 6 in the inner shell 2 transports the hot air from the heating device 5 to the drying area between the partition 1 3 and the partition 2 4. The infrared device 7 emits infrared radiation, and the temperature in the area is the same as the required drying temperature. Figure 4The introduction direction of the diaphragm shown above is arranged on the equipment as follows: one end of the diaphragm is pulled between the two rotating rollers, pulled into the inner shell 2, and then continues to pass through the opening on the partition 1 3 to the left, and passes through the two conveying rollers 8 in the drying area, and then pulled out from the opening on the partition 2 4. As shown in the figure, the diaphragm is arranged along the two conveying rollers 8 on the left side of the partition 2 4, and finally one end of the diaphragm is wound around the film roller of the winder 10 and fixed to complete the film guiding work before drying. When the arranged diaphragm is transported, the tension force of the diaphragm is consistent in all parts and areas of the equipment. When the drying work is in progress, the motor on the winder 10 is started to rotate, and the motor rotates slowly and evenly, driving the film roller to rotate, and one end of the diaphragm fixed on the film roller begins to be wound, pulling the coated diaphragm that has been inserted into the equipment to the left. The diaphragm is transported and enters the drying area. Under the action of high temperature in the drying area, the solvent in the inorganic ceramic materials such as alumina coated on the diaphragm and the high-temperature resistant polymer material coating such as aramid coated on the diaphragm evaporates, and the coating is solidified into a film. The diaphragm with the dried coating layer is continuously transported and wound under the cooperation of the winder 10 and the conveying rollers 8 in each area of ​​the equipment. By arranging a hot air heating device 5 in the drying area to transfer heat energy through the laminar movement of the hot air, the air in the drying area is continuously heated and circulated, and the temperature in each area is uniform and stable. At the same time, the infrared device 7 is cooperated with the hot air transmitted by the heating device 5 as a heat carrier for heating. The characteristics of strong infrared radiation penetration and high thermal efficiency are utilized to save energy consumption while effectively overcoming the temperature difference and shielding effect, so as to avoid uneven heating of the diaphragm during drying and affect the coating quality.

[0023] Embodiment 2: Based on embodiment 1, Figure 1 , Figure 2 and Figure 4 As shown, a cooling device 13 and a metal guide plate 14 are also included. A metal guide plate 14 with good thermal conductivity is fixedly connected to the left part of the inner shell 2. The cooling device 13 is installed on the metal guide plate 14. The metal guide plate 14 is equipped with a pipe connected to the cooling device 13. When working, the metal guide plate 14 is continuously cooled.

[0024] like Figure 2 and Figure 4 As shown, it also includes a fixed rod 11 and a rotating frame 12. The fixed rod 11 is symmetrically connected to the front and back of the left upper part of the inner shell 2. A rotating frame 12 with an adjustable angle is rotatably provided between the fixed rods 11. The rotating frame 12 is composed of a mounting frame and a film pressing roller. When in use, the film pressing roller contacts the film surface. The squeezing force of the film pressing roller on the diaphragm can be adjusted by adjusting the angle of the rotating frame 12.

[0025] When the diaphragm is fed from the feed roller group 9, the rotating frame 12 can be rotated to make the film pressing roller contact with the film surface, and the squeezing force of the film pressing roller on the diaphragm can be adjusted by adjusting the angle of the rotating frame 12. When the film is fed through the rotating frame 12, the tension of the film surface during the diaphragm transportation is adjusted to avoid deformation of the diaphragm due to force when the diaphragm is too tight or too loose during transportation. When the winder 10 is winding, a metal guide plate 14 and a cooling device 13 are arranged between the conveying roller 8 on the far left and the winder 10. A pipe connected to the cooling device 13 is arranged in the metal guide plate 14, and the cooling device 13 is connected to the metal guide plate through the pipe. 14 performs continuous cooling work, and the upper side of the metal guide plate 14 will contact the bottom of the continuously transmitted diaphragm. When in contact, the metal guide plate 14 with a lower temperature can cool the diaphragm with a higher residual temperature after drying. The cooling device 13 can perform continuous cyclic cooling on the metal guide plate 14 to maintain the temperature of the metal guide plate 14. The diaphragm is cooled by the cooling device 13 to avoid the diaphragm absorbing cold and humid air in the air to cool down after the high-temperature diaphragm leaves the equipment, causing the diaphragm to absorb water vapor and become damp, which affects the coating quality and affects the subsequent testing, analysis, storage and other working conditions.

[0026] In a preferred embodiment: the inner shell 2, partition 1 3 and partition 2 4 have good thermal insulation performance and low heat energy loss.

[0027] In a preferred embodiment, a plurality of small holes are opened on the heat flow pipe 6 to stably blow out the heat flow generated in the heating device 5 .

[0028] In a preferred embodiment: an opening is provided on the outer shell 1 to facilitate air circulation when the heating device 5 is working, so that the heating device 5 that produces hot air is connected to the outside world, avoiding local accumulation of heat when the heating device 5 is working, which cannot be discharged normally, and overheating and damage of the heating device 5, affecting normal use.

[0029] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A drying device for coating a battery diaphragm, comprising an outer shell (1), an inner shell (2), a partition plate 1 (3), a partition plate 2 (4), a heating device (5) and a heat flow pipe (6), wherein the inner shell (2) is fixedly connected to the outer shell (1), the partition plate 1 (3) is fixedly welded to the right part of the inner shell (2), the partition plate 2 (4) is fixedly welded to the left part of the inner shell (2), the heating device (5) is installed on the upper part of the inner shell (2), the heat flow pipe (6) is symmetrically arranged at the front and rear of the front part of the heating device (5), the heat flow pipe (6) is connected to the heating device (5), and the heat flow pipe (6) is penetrated into the inner shell (2); Its characteristics are: It also includes an infrared device (7), a conveying roller (8), a feed roller group (9) and a winding machine (10). Two infrared devices (7) are arranged on the front and rear sides of the inner shell (2), and the infrared devices (7) are installed in the space divided between the partition plate 1 (3) and the partition plate 2 (4) on the inner shell (2). Four conveying rollers (8) are rotatably connected in the inner shell (2). A feed roller group (9) is arranged on the left side of the upper part of the inner shell (2). The feed roller group (9) consists of a support frame and two rotating rollers. The rotating rollers are rotatably connected to the support frame. A winding machine (10) is fixedly installed on the lower left part of the outer shell (1). The winding machine (10) consists of a motor and a film rolling roller.

2. A drying device for coating a battery separator according to claim 1, characterized in that: It also includes a cooling device (13) and a metal guide plate (14). The metal guide plate (14) is fixedly connected to the left inner portion of the inner shell (2), and the cooling device (13) is installed on the metal guide plate (14).

3. A drying device for coating a battery separator according to claim 2, characterized in that: It also includes a fixed rod (11) and a rotating frame (12). The fixed rod (11) is symmetrically connected to the left side of the upper part of the inner shell (2) in front and back directions. The rotating frame (12) is rotatably arranged between the fixed rods (11). The rotating frame (12) is composed of a mounting frame and a film pressing roller.

4. A drying device for coating a battery separator according to claim 3, characterized in that: The inner shell (2), the first partition (3) and the second partition (4) have good thermal insulation performance.

5. A drying device for coating a battery separator according to claim 4, characterized in that: A plurality of small holes are formed on the heat flow pipe (6).

6. A drying device for coating a battery separator according to claim 5, characterized in that: The outer shell (1) is provided with an opening for air circulation when the heating device (5) is working.

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