CN206464157U - A lithium battery pole piece coating machine - Google Patents

Abstract

The utility model provides a lithium battery pole piece coating machine, is including unwinding mechanism, coating mechanism, stoving mechanism and the winding mechanism that sets gradually, stoving mechanism includes oven shell, be equipped with a plurality of infrared pipes on oven shell's the roof, the inside upper end of oven shell is equipped with a plurality of contacts and crosses the roller, the lower extreme is equipped with a plurality of suspensions and crosses the roller, the roller is crossed in the contact and the suspension crosses the roller and in the pole piece tape transport direction crisscross the setting. The roller in the drying oven of the coating machine consists of a contact roller and a suspension roller, the reciprocating type belt walking of the pole piece is realized by the staggered arrangement of the contact roller and the suspension roller in the belt walking direction of the pole piece, and the length of the drying oven is greatly shortened; and two heating modes of infrared heating and hot air heating in the oven are simultaneously carried out, so that the heating efficiency is increased.

Description

A lithium battery pole piece coating machine

technical field

The invention relates to the technical field of lithium batteries, in particular to a lithium battery pole piece coating machine.

Background technique

As an emerging energy storage carrier and a new force in the field of new energy, lithium batteries are playing an increasingly important role in the process of changing human lifestyles. The coating process of lithium battery pole pieces is a key process in the production process of lithium batteries, and the quality of coating directly affects the capacity and safety of batteries. Although in the prior art, there are many types of lithium battery pole piece coating machines, the conveyor belts of the current pole piece coating machines all adopt a horizontal linear type, and the length of the oven is as long as 30-60m, so that the pole piece coating machine must be installed It is extremely complex and occupies a large area. With the increasing demand for production capacity of a single device, the traditional pole piece coating machine can no longer meet the production demand.

Contents of the invention

The purpose of the present invention is to provide a lithium battery pole piece coating machine, which adopts a reciprocating belt-running mode, which greatly shortens the length of the oven and solves the problems of complex installation and large footprint of traditional coating machines .

The technical problem to be solved by the present invention is realized by the following technical solutions.

A lithium battery pole piece coating machine, comprising an unwinding mechanism, a coating mechanism, a drying mechanism and a winding mechanism arranged in sequence, the drying mechanism includes an oven shell, and the upper and lower ends of the oven shell are respectively provided with A plurality of air inlets and outlets arranged in parallel and evenly distributed in the depth direction of the oven shell, a plurality of nozzles for passing hot air into the oven are arranged under the air inlets, and a plurality of nozzles are arranged on the top plate of the oven shell. In the infrared tube, the upper end of the oven shell is provided with a plurality of contact rollers, and the lower end is provided with a plurality of suspension rollers, and the contact rollers and suspension rollers are arranged alternately in the direction of the pole piece.

Further, the coating mechanism includes a coating head and a coating roller located on both sides of the pole piece belt, and the distance between the coating head and the surface of the pole piece is 500-200um.

Further, the unwinding mechanism includes an unwinding device and an unwinding and changing device, the unwinding and changing device is located at the rear end of the unwinding device, and the winding mechanism includes a winding device and a winding and changing device, so The winding and changing device is located at the front end of the winding device.

Further, the unwinding device is composed of an unwinding motor, an inflatable shaft and a pole piece roll, and the winding device is composed of a winding motor, an inflatable shaft and a pole piece roll, and the unwinding and changing device and the winding The roll changing device is composed of two sets of cylinder platens.

Further, an unwinding deviation correcting device is provided between the unwinding device and the coating mechanism, and the unwinding deviation correcting device includes an unwinding deviation correcting sensor and an unwinding deviation correcting roller. A winding deviation correction device, the winding deviation correction device includes a winding deviation correction sensor and a winding deviation correction roller.

Further, the unwinding deviation correction sensor and the winding deviation correction sensor are located on one side edge of the pole piece in the width direction.

Further, the rear end of the unwinding deviation correction device is provided with an unwinding traction roller, and a winding traction roller is provided between the winding deviation correction sensor and the winding deviation correction roller, and the unwinding traction roller and the winding traction roller are both It includes traction rollers and rubber rollers respectively located on both sides of the pole piece belt.

Further, multiple sets of passing rollers are provided between the unwinding device and the winding device to change the direction of the pole piece or the composite material, and to avoid the operating station.

Further, a flattening roller for flattening the surface of the pole piece is arranged between the drying mechanism and the winding and correcting device.

Further, the number of the contacting rollers is one more than the number of the suspension rollers.

The beneficial effects of the present invention are: the rollers in the oven of the coating machine are composed of two types: contact rollers and suspension rollers. The reciprocating tape transport of the film greatly shortens the length of the oven; and the two heating methods of infrared heating and hot air heating in the oven are carried out at the same time, which increases the heating efficiency.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the schematic diagram of the structure of the suspended roller;

Figure 3 is a schematic diagram of the structure of the nozzle.

Among them, 1--unwinding mechanism, 3--coating mechanism, 4--rewinding mechanism, 5--drying mechanism, 10--unwinding and correcting device, 11--unwinding device, 12--unwinding mechanism Roll changing device, 13--unwinding deviation correction sensor, 21-over roller, 22-unwinding deviation correction roller, 23-unwinding traction roller, 24-flattening roller, 25-rewinding traction roller, 26 --Rewinding deviation correction roller, 31--coating head, 32--coating roller, 40--rewinding deviation correction device, 41--rewinding device, 42--rewinding and changing device, 43--rewinding Correction sensor, 50--oven shell, 51--air inlet, 52--nozzle, 53--infrared tube, 54--contact roller, 55--suspension roller, 56--air outlet, suspension roller inlet The air outlet 551, the air outlet 552 of the suspended roller.

detailed description

In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

As shown in Figure 1, a lithium battery pole piece coating machine includes an unwinding mechanism 1, a coating mechanism 3, a drying mechanism 5 and a winding mechanism 4 arranged in sequence. The drying mechanism 5 includes an oven shell 50, which is welded by 2-5mm steel plates and filled with thermal insulation materials. The upper end and the lower end of the oven shell 50 are respectively provided with a plurality of air inlets 51 and air outlets 56 arranged in parallel and evenly distributed in the depth direction of the oven shell 50. The air inlets 51 are used to provide circulating hot air and replacement fresh air. The air outlet 56 is used to remove the drying hot air. The below of described air inlet 51 is provided with a plurality of nozzles 52 that are used to pass hot air into oven inside, and described nozzles 52 are made by 0.5-2mm stainless steel sheet metal, and its end is made into triangle (as shown in Figure 3), carries out The hot air from the tuyere 51 enters the inside of the oven through the long and narrow passage of the nozzle 52 . The top plate of the oven shell 50 is provided with a plurality of infrared tubes 53, the upper end of the oven shell 50 is provided with a plurality of contact rollers 54, and the lower end is provided with a plurality of suspension rollers 55, the contact rollers 54 and The suspension passing rollers 55 are arranged staggeredly in the pole piece tape-running direction, and the number of the contact passing rollers 54 is one more than the number of the suspension passing rollers 55 . The contact roller 54 is driven by a chain driven by a motor, the surface is coated, the diameter of the roller is 80-150mm, the surface roughness is 0.2-0.4s, and the dynamic balance is 10-20g. The suspension roller 55 is driven by a chain driven by a motor, and its end is provided with a suspension roller air inlet 551, and the suspension roller air outlet 552 is evenly distributed on the surface of the roller, so that the roller does not contact the coated surface of the pole piece, and avoids damage to the coated surface. make an impact.

The coating mechanism 3 includes a coating head 31 and a coating roller 32 positioned on both sides of the pole piece belt, and the coating head 31 is used to provide coating slurry, and the distance between the coating head 31 and the surface of the pole piece is controlled at 50-200um, the two sides of the coating head 31 are precisely adjusted by the screw, and the adjustment accuracy is 1um. The coating roller 32 is driven by a servo motor, the surface is coated, the diameter of the roller is 250-300mm, the surface roughness is 0.1-0.2s, and the circular runout error is less than 3um.

The unwinding mechanism 1 includes an unwinding device 11 and an unwinding and changing device 12, the unwinding and changing device 12 is located at the rear end of the unwinding device 11, and the rewinding mechanism 4 includes a rewinding device 41 and a rewinding device 12. A roll changing device 42 , the winding and changing device 42 is located at the front end of the winding device 41 . The unwinding device 11 is composed of an unwinding motor, an inflatable shaft and a pole piece roll, and the winding device 41 is composed of a winding motor, an inflatable shaft and a pole piece roll, and both the unwinding motor and the winding motor are servo motors. One end of the motor and the air shaft can be opened for pole roll replacement, and the inflation of the air shaft needs to be released during replacement. Both the unwinding and changing device 12 and the winding and changing device 42 are composed of two sets of cylinder pressure plates, the cylinder stroke is 2-5cm, and the cylinder diameter is 6-12mm. .

An unwinding deviation correcting device 10 is provided between the unwinding device 11 and the coating mechanism 3, and the unwinding deviation correcting device 10 includes an unwinding deviation correcting sensor 13 and an unwinding deviation correcting roller 22, and the winding device 41 and drying A winding and deviation correcting device 40 is provided between the mechanisms 5 , and the winding and deviation correcting device 40 includes a winding and deviation correcting sensor 43 and a winding and deviation correcting roller 26 . The unwinding deviation correction sensor 13 and the winding deviation correction sensor 43 are located on one side edge of the pole piece in the width direction, and are used to detect the real-time position deviation of the pole piece running belt, and feed back to the control system for deviation compensation calculation, and control the deviation correction wheel for adjustment after calculation Correction deviation, deviation correction range ±30-50mm, deviation correction response time 5ms. The surface of the unwinding deviation correcting roller 22 and the winding deviation correcting roller 26 is coated, the diameter of the roll is 100-150mm, the surface roughness is 0.4s, and the dynamic balance is 10-20g.

The rear end of the unwinding correction device 10 is provided with an unwinding traction roller 23, and a winding traction roller 25 is arranged between the winding correction sensor 43 and the winding correction roller 26, and the unwinding traction roller 23 and the winding The coil pulling rollers 25 all include pulling rollers and rubber rollers respectively located on both sides of the pole piece belt running. The rubber roller is a movable roller, which is driven by a cylinder, and the stroke of the cylinder is 1-5cm, and two sets of cylinders are set to ensure the flushness of the push. The surface of the traction roller is coated and treated, the diameter of the roller is 150-200mm, the surface roughness is 0.2-0.4s, and the dynamic balance is 10-20g. The rubber roller has a diameter of 150-200mm, a surface roughness of 0.4-0.8s, a dynamic balance of 20g, and a 5-10mm rubber layer on the surface, which has a certain strength.

Between the unwinding device 11 and the winding device 41, there are multiple sets of passing rollers 21 for changing the direction of the pole piece or composite material and avoiding the operation station. The passing roller 21 is fixed on the equipment support through the bearing seat, the circular runout error is less than 0.01mm, the surface is coated or oxidized, the roller diameter is 60-150mm, the surface roughness is 0.4-0.8s, and the dynamic balance is 10-20g. A flattening roller 24 is arranged between the drying mechanism 5 and the winding and correcting device 40, and the surface of the flattening roller 24 is treated with flattening, the diameter of the roller is 150-200mm, and the dynamic balance is 10-20g.

The working principle of the coating machine is:

1) The pole piece is unwound through the unwinding mechanism 11, and the tape running direction is adjusted through the roller 21. Unwinding deviation correction 13 detects the deviation value of the edge of the tape, and feeds the deviation value back to the system to calculate the adjustment method. The unwinding and rectifying roller 22 adjusts the deviation correspondingly.

2) The unwinding traction roller 23 provides power for conveying the pole piece, and transports the pole piece to the coating roller 32. The coating head 31 advances to start the coating work, and the coated pole piece enters the oven.

3) The pole pieces entering the oven are reciprocally conveyed through the contact roller 54 and the suspension roller 55, the contact roller 54 is not in contact with the coated surface of the pole piece, and the suspension roller 55 passes through the hot air from the suspension roller outlet 552 Keep the coated surface in a state of suspension for conveying. Hot air is provided through the nozzle 52 in the oven, and an infrared tube 53 is used to increase the temperature in the oven.

4) Provide circulating hot air and fresh air for the oven through the air inlet 51, and discharge the drying waste gas through the air outlet 56.

5) The dried pole piece is flattened by the flattening roller 24 at the outlet of the oven, and the winding traction roller 25 provides conveying power for the pole piece flowing out of the oven. Winding deviation correction 43 detects the deviation value of the tape running edge, and feeds the deviation value back to the system to calculate the adjustment method. The unwinding and rectifying roller 26 adjusts the deviation correspondingly.

6) Stop operation when unwinding and changing rolls, first clamp the pole piece close to the passing roller 21 in the two groups of cylinders of the unwinding and changing roll mechanism 12, and manually remove the mandrel on the unwinding mechanism 11. After replacing the new material roll, stick it together with the previous pole piece with adhesive tape. Rewinding and changing rolls are the same as unwinding and changing rolls.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A lithium battery pole piece coating machine, comprising an unwinding mechanism (1), a coating mechanism (3), a drying mechanism (5) and a winding mechanism (4) arranged in sequence, is characterized in that: the The drying mechanism (5) comprises an oven shell (50), and the upper and lower ends of the oven shell (50) are respectively provided with a plurality of air inlets (51) and air outlets arranged in parallel and uniformly distributed in the depth direction of the oven shell (50). (56), the bottom of the air inlet (51) is provided with a plurality of nozzles (52) for passing hot air into the inside of the oven, and the top plate of the oven shell (50) is provided with a plurality of infrared tubes (53) , the upper end of the oven shell (50) is provided with a plurality of contact rollers (54), and the lower end is provided with a plurality of suspension rollers (55), and the contact rollers (54) and suspension rollers (55) are The pole pieces are set staggeredly in the direction of tape travel. 2. A lithium battery pole piece coating machine according to claim 1, characterized in that: the coating mechanism (3) includes a coating head (31) and a coating roller located on both sides of the pole piece belt (32), the distance between the coating head (31) and the pole piece surface is 500-200um. 3. A lithium battery pole piece coating machine according to claim 1, characterized in that: the unwinding mechanism (1) comprises an unwinding device (11) and an unwinding and changing device (12), the The unwinding and changing device (12) is located at the rear end of the unwinding device (11), and the winding mechanism (4) includes a winding device (41) and a winding and changing device (42). The device (42) is located at the front end of the winding device (41). 4. A lithium battery pole piece coating machine according to claim 3, characterized in that: an unwinding and deviation correction device (10) is provided between the unwinding device (11) and the coating mechanism (3), The unwinding deviation correcting device (10) comprises an unwinding deviation correcting sensor (13) and an unwinding deviation correcting roller (22), and a winding deviation correcting device ( 40), the winding deviation correction device (40) includes a winding deviation correction sensor (43) and a winding deviation correction roller (26). 5. A lithium battery pole piece coating machine according to claim 4, characterized in that: the rear end of the unwinding and deviation correcting device (10) is provided with an unwinding traction roller (23), and the winding and deviation correcting A winding traction roller (25) is arranged between the sensor (43) and the winding correction roller (26). Side traction rollers and rubber rollers. 6. A lithium battery pole piece coating machine according to claim 3, characterized in that: the unwinding device (11) is composed of an unwinding motor, an air expansion shaft and a pole piece roll, and the winding device (41) is made up of winding motor, air-expanding shaft and pole piece roll, and described unwinding and changing device (12) and winding and changing device (42) are all made up of two groups of cylinder pressure plates. 7. A lithium battery pole piece coating machine according to claim 4, characterized in that: the unwinding deviation correction sensor (13) and winding deviation correction sensor (43) are located at one side edge of the pole piece width direction. 8. A lithium battery pole piece coating machine according to claim 3, characterized in that: between the unwinding device (11) and the winding device (41), there are multiple groups for changing the pole piece or Composite material takes the belt direction, avoids the passing roller (21) of operating station. 9. A lithium battery pole piece coating machine according to claim 4, characterized in that: a device for stretching the surface of the pole piece is arranged between the drying mechanism (5) and the winding deviation correction device (40). Flattening rollers (24) for plain weaving. 10. A lithium battery pole piece coating machine according to claim 1, characterized in that: the number of the contact rollers (54) is one more than the number of the suspension rollers (55).