Coating machine
By introducing a magnetic field generating mechanism into the coating machine, conductive particles are arranged in an orderly manner along the thickness direction of the substrate, which solves the problem of irregular arrangement of conductive particles in the slurry, improves the energy density and conductivity of the electrode, and enhances the performance of lithium batteries.
Patent Information
- Application Number
- CN202422521004.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-10-17
AI Technical Summary
In existing coating machines, the conductive particles in the slurry are arranged randomly during the coating process, which leads to a decrease in the energy density and conductivity of the electrode in a single direction, affecting the performance of lithium batteries.
A magnetic field generating mechanism is introduced into the coating machine. The magnetic field causes the conductive particles to arrange themselves in an orderly manner along the thickness direction of the substrate. The magnetic field generating mechanism includes a base, an annular yoke, a lower pole, an upper pole, a lower coil, and an upper coil, which form a magnetic field to arrange the conductive particles in an orderly manner.
This increases the energy density and conductivity in a single direction of the electrode, thereby improving the performance of the lithium battery.
Smart Images
Figure CN223505554U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium battery production technology, specifically to a coating machine. Background Technology
[0002] The electrode of a lithium battery cell generally consists of a substrate (e.g., a current collector) and a slurry layer coated onto the substrate. Currently, electrode preparation is generally accomplished using a coating machine. Existing coating machines typically include an unwinding mechanism, a coating mechanism, an oven, and a winding mechanism. In electrode preparation, the substrate is first unwound by the unwinding mechanism, then the slurry is coated onto the substrate by the coating mechanism, the slurry on the substrate is then heated and dried in the oven, and finally the substrate is wound up by the winding mechanism to obtain the electrode.
[0003] In the above coating method, after the slurry is applied to the substrate by the coating mechanism, the conductive particles 1 in the slurry are usually randomly arranged, such as... Figure 1 As shown, the randomly arranged conductive particles 1 reduce the energy density and conductivity in a single direction of the electrode, thus affecting the performance of the lithium battery. Utility Model Content
[0004] To overcome the shortcomings of the prior art, this utility model provides a coating machine that can increase the energy density and conductivity speed of the electrode in a single direction, thereby improving the performance of the lithium battery.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] A coating machine includes an unwinding mechanism, a coating mechanism, an oven, and a rewinding mechanism arranged sequentially along a substrate travel path. It also includes a magnetic field generating mechanism disposed between the coating mechanism and the oven mechanism along the substrate travel path. The magnetic field generating mechanism includes a base, an annular yoke, a lower pole, an upper pole, a lower coil, and an upper coil. The bottom end of the annular yoke is disposed at the top end of the base. The upper and lower poles are arranged vertically opposite each other. The lower pole is disposed within a lower through-hole at the bottom end of the annular yoke, with one end protruding from the bottom end of the annular yoke and accommodated in a groove at the top end of the base, and the other end... The upper pole is inserted into the interior of the annular yoke. It is located in the upper through hole at the top of the annular yoke, with one end protruding from the top of the annular yoke and the other end extending into the interior of the annular yoke. An air gap is formed between the other end of the upper pole and the other end of the lower pole. The lower coil is located inside the annular yoke and wound around the lower pole. The upper coil is located inside the annular yoke and wound around the upper pole. The end of the upper coil and the beginning of the lower coil are electrically connected. The beginning of the upper coil and the end of the lower coil are respectively used to electrically connect to the positive and negative terminals of an external power source.
[0007] As a preferred technical solution, the lower pole post is fitted with a lower connector, the lower connector is located outside the annular yoke and fixed to the bottom end of the annular yoke, the lower connector is accommodated in the annular groove at the top of the base, the annular groove is arranged around the groove and communicates with the groove.
[0008] As a preferred technical solution, the upper pole post is fitted with an upper connector, which is located outside the annular yoke and fixed to the top of the annular yoke.
[0009] As a preferred technical solution, the lower pole post is fitted with a lower coil frame, which is located inside the annular yoke. The lower coil is wound on the lower coil frame. The top and bottom ends of the outer wall of the lower coil frame each form two first ring portions. A lower sealing plate is provided between the two first ring portions. A lower space is formed between the lower sealing plate, the two first ring portions, and the lower coil frame. The lower coil is located in the lower space. The lower sealing plate has a first through hole and a second through hole corresponding to the beginning and end ends of the lower coil, respectively. The beginning and end ends of the lower coil pass through the first through hole and the second through hole, respectively, and are located outside the lower space.
[0010] As a preferred technical solution, the upper pole post is fitted with an upper coil frame, which is located inside the annular yoke. The upper coil is wound on the upper coil frame. The top and bottom ends of the outer wall of the upper coil frame each form two second ring portions. An upper sealing plate is provided between the two second ring portions. An upper space is formed between the upper sealing plate, the two second ring portions, and the upper coil frame. The upper coil is located in the upper space. The upper sealing plate has a third through hole and a fourth through hole corresponding to the first end and the last end of the upper coil, respectively. The first end and the last end of the upper coil pass through the third through hole and the fourth through hole, respectively, and are located outside the upper space.
[0011] As a preferred technical solution, the magnetic field generating mechanism further includes a first roller and a second roller. The two ends of the first roller are rotatably mounted on two first mounting plates, and the two first mounting plates are respectively mounted on the side of the annular yoke near the coating mechanism. The two ends of the second roller are rotatably mounted on two second mounting plates, and the two second mounting plates are respectively mounted on the side of the annular yoke near the oven. The apex of the outer peripheral surface of the first roller, the center of the air gap, and the apex of the outer peripheral surface of the second roller are all located in the same horizontal plane.
[0012] As a preferred technical solution, the coating mechanism includes two coating frames arranged opposite to each other, a coating steel roller, a base, a coating die, and two push cylinders. The two ends of the base are slidably mounted on the two coating frames, and the coating steel roller is located on one side of the base. The two ends of the coating steel roller are rotatably mounted on the two coating frames. The coating die is opposite to the coating steel roller and is located at the top of the base. The coating die protrudes from the side of the base near the coating steel roller. The two push cylinders are arranged opposite to each other and are respectively mounted on the two coating frames. The output ends of the two push cylinders are respectively connected to the base. The two push cylinders are used to drive the base to move towards or away from the coating steel roller, thereby driving the coating die to move towards or away from the coating steel roller.
[0013] As a preferred technical solution, the coating mechanism further includes a rubber roller assembly, which includes a rubber roller, two swing arms, a connecting shaft, and two swing arm cylinders. The rubber roller is located below the coating steel roller, and the connecting shaft is located on the side of the rubber roller away from the coating die head. The two ends of the connecting shaft are respectively mounted on the two coating frames. The two swing arms are arranged opposite to each other and rotatably mounted on the connecting shaft. The two ends of the rubber roller are rotatably mounted on the first ends of the two swing arms. The two swing arm cylinders are arranged opposite to each other, and the connecting shaft is located between the rubber roller and the two swing arm cylinders. The two swing arm cylinders are respectively mounted on the two coating frames, and the output ends of the two swing arm cylinders are rotatably connected to the second ends of the two swing arms. The two swing arm cylinders are used to drive the two swing arms to rotate around the axis of the connecting shaft, thereby driving the rubber roller closer to or away from the coating steel roller.
[0014] As a preferred technical solution, the coating mechanism further includes an adjustment assembly, which includes two screw slides arranged opposite each other and two wedge blocks. The two screw slides are respectively disposed on the two coating frames and located below the second ends of the two swing arms. The two wedge blocks are respectively connected to the two screw slides. The screw slides are used to drive the corresponding wedge blocks to move towards or away from the coating die head. The top of the wedge block has an inclined surface. The second ends of the two swing arms are respectively provided with two rollers, and the two rollers slide in contact with the inclined surfaces of the two wedge blocks.
[0015] As a preferred technical solution, the coating machine further includes an unwinding tension adjusting mechanism disposed between the unwinding mechanism and the coating mechanism along the travel path of the substrate, and a winding tension adjusting mechanism disposed between the drying oven and the winding mechanism.
[0016] The beneficial effects of this utility model are as follows: This utility model sets a magnetic field generating mechanism between the coating mechanism and the oven along the travel path of the substrate. The magnetic field generating mechanism includes a base, an annular yoke, a lower electrode post, an upper electrode post, a lower coil, and an upper coil. After the upper and lower coils are energized, a magnetic field can be formed in the air gap formed between the other end of the upper electrode post and the other end of the lower electrode post. When the coated substrate passes through the air gap, the substrate is perpendicular to the magnetic field lines. Thus, the conductive particles in the slurry of the substrate can be magnetized by the magnetic field, so that the conductive particles can be arranged in an orderly manner along the thickness direction of the substrate. This can increase the energy density and conductivity speed of the electrode in a single direction, thereby improving the performance of the lithium battery. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1 This is a schematic diagram of the arrangement of conductive particles in the slurry when they are not magnetized.
[0019] Figure 2 This is a schematic diagram of the structure of a coating machine provided in one embodiment of the present invention;
[0020] Figure 3 yes Figure 2 The diagram shows the structure of the unwinding mechanism and the unwinding tension adjustment mechanism of the coating machine.
[0021] Figure 4 yes Figure 3 A schematic diagram of the tension swing roller assembly and the unwinding tension detection roller of the unwinding tension adjustment mechanism shown;
[0022] Figure 5 yes Figure 2 A schematic diagram of the coating mechanism of the coating machine shown.
[0023] Figure 6 yes Figure 5 A schematic diagram of the coating mechanism shown, including the coating steel roller, rubber roller assembly, adjusting assembly, and fifth coating roller.
[0024] Figure 7 yes Figure 2 A schematic diagram of the magnetic field generating mechanism of the coating machine at the first angle;
[0025] Figure 8 yes Figure 7 A schematic diagram of the magnetic field generating mechanism at the second angle;
[0026] Figure 9 yes Figure 7 A cross-sectional schematic diagram of the magnetic field generating mechanism shown.
[0027] Figure 10 yes Figure 7 The diagram shows the structure of the magnetic field generating mechanism after removing the base, the first roller, the two first mounting plates, the second roller, and the two second mounting plates.
[0028] Figure 11 yes Figure 2 The diagram shows the structure of the winding tension adjustment mechanism and the winding mechanism of the coating machine.
[0029] Figure 12 This is a schematic diagram showing the arrangement of conductive particles in the slurry after they have been magnetized. Detailed Implementation
[0030] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.
[0031] Please refer to Figure 2 An embodiment of this utility model provides a coating machine, comprising an unwinding mechanism 10, an unwinding tension adjusting mechanism 20, a coating mechanism 30, a magnetic field generating mechanism 40, an oven 50, a winding tension adjusting mechanism 60, and a winding mechanism 70 arranged sequentially from left to right along the travel path of a substrate 100. The substrate 100 is a positive electrode current collector or a negative electrode current collector.
[0032] Combination Figure 3As shown, the unwinding mechanism 10 is used to unwind the substrate 100 of the base material roll. The unwinding mechanism 10 includes two unwinding frames 11 arranged in a front-to-back configuration, an unwinding shaft 12, and an unwinding motor (not shown in the figure). The unwinding shaft 12 is located between the two unwinding frames 11. One end of the unwinding shaft 12 is rotatably mounted in a mounting hole of one of the unwinding frames 11, for example, the one located in front. The other end of the unwinding shaft 12 passes through a mounting hole of the other unwinding frame 11, for example, the one located in the rear, and is connected to the output end of the unwinding motor. The unwinding motor is mounted on the other unwinding frame 11 and is used to drive the unwinding shaft 12 to rotate. In practical applications, after the base material roll is mounted on the unwinding shaft 12, the rotation of the unwinding shaft 12 enables the unwinding of the substrate 100 of the base material roll. An unwinding bearing is provided in the mounting hole of the unwinding frame 11, and the unwinding bearing is sleeved on the unwinding shaft 12 to provide rotational support for the unwinding shaft 12. In this embodiment, there are two unwinding shafts 12, which are spaced apart. One unwinding shaft 12 is close to the side of the unwinding frame 11 away from the coating mechanism 30, and the other unwinding shaft 12 is located to the upper right of the first unwinding shaft 12. The number of unwinding motors corresponds to the number of unwinding shafts 12, which is also two. In practical applications, the base material roll installed on one unwinding shaft 12 is the working material roll, and the base material roll installed on the other unwinding shaft 12 is the spare material roll. When the base material 100 of the working material roll is exhausted, the base material 100 of the spare material roll and the base material 100 of the working material roll are connected by tape and the base material 100 of the working material roll is cut off. This allows for the exchange between the working material roll and the spare material roll. Then, the unwinding motor corresponding to the other unwinding shaft 12 drives the other unwinding shaft 12 to rotate, thereby enabling the unwinding of the base material 100 of the spare material roll.
[0033] Combination Figure 3 and Figure 4As shown, the unwinding tension adjustment mechanism 20 is used to adjust the tension of the substrate 100 to prevent wrinkles or breakage. The unwinding tension adjustment mechanism 20 includes two adjusting frames 21 arranged opposite each other, a tension detection roller 22, and a tension swing roller assembly 23. The tension detection roller 22 is used to detect the tension of the substrate 100. The tension detection roller 22 is located between the two adjusting frames 21, and its two ends are rotatably mounted on the two adjusting frames 21 via two tension bearing seats. The tension swing roller assembly 23 is used to adjust the tension of the substrate 100 according to the tension value detected by the tension detection roller 22. The tension swing roller assembly 23 includes a swing roller 231, a rotating shaft 232, two tension swing arms 233, and two tension swing arm cylinders 234. The rotating shaft 232 is located between the two adjusting frames 21, and its two ends are rotatably mounted in the mounting holes of the two adjusting frames 21 via two rotating shaft bearings. The rotating shaft bearings provide rotational support for the rotating shaft 232. Two tension swing arms 233 are arranged in a front-to-back configuration. The first ends of each tension swing arm 233 are fixedly sleeved on a rotating shaft 232. A swing roller 231 is located below the rotating shaft 232 and between the second ends of the two tension swing arms 233. Both ends of the swing roller 231 are rotatably mounted in holes at the second ends of the two tension swing arms 233 via two swing roller bearings, which provide rotational support for the swing roller 231. A tension detection roller 22 is located on one side of the two tension swing arms 233, for example, to the right of the two tension swing arms 233. Two tension swing arm cylinders 234 are located on one side of the two tension swing arms 233, for example, to the right of the two tension swing arms 233. The two tension swing arm cylinders 234 are mounted on two adjusting frames 21 via two tension cylinder seats 2341. The output ends of the two tension swing arm cylinders 234 are rotatably connected to the two tension swing arms 233. Two tension swing arm cylinders 234 are used to drive two tension swing arms 233 to rotate around the axis of the rotating shaft 232, thereby driving the swing roller 231 to rotate around the axis of the rotating shaft 232. The rotation of the two tension swing arms 233 can drive the rotating shaft 232 to rotate.
[0034] In practical applications, the substrate 100 unwound by the unwinding mechanism 10 first passes around the right side of the tension detection roller 22, and then passes around the left side of the swing roller 231. The tension of the substrate 100 can be detected by the tension detection roller 22. When the tension of the substrate 100 increases, the two tension swing arm cylinders 234 drive the two tension swing arms 233 to rotate counterclockwise around the axis of the rotating shaft 232, thereby driving the swing roller 231 to rotate counterclockwise around the axis of the rotating shaft 232. This reduces the distance between the swing roller 231 and the tension detection roller 22, thereby reducing the tension of the substrate 100. When the tension of the substrate 100 decreases, the two tension swing arms 233 are driven by the two tension swing arm cylinders 234 to rotate clockwise around the axis of the rotating shaft 232, thereby causing the swing roller 231 to rotate clockwise around the axis of the rotating shaft 232, increasing the distance between the swing roller 231 and the tension detection roller 22, thus increasing the tension of the substrate 100.
[0035] The output ends of the two tension swing arm cylinders 234 are rotatably connected to the two tension swing arms 233, respectively. Specifically, two fixed shafts 2331 are respectively provided on the adjacent sides of the two tension swing arms 233, and the output ends of the two tension swing arm cylinders 234 are rotatably connected to the two fixed shafts 2331 through two fisheye connectors 2342. The fisheye connectors 2342 are existing structures, and their structure will not be described in detail here.
[0036] Combination Figure 5 and Figure 6 As shown, the coating mechanism 30 is used to coat the slurry onto the substrate 100. The coating mechanism 30 includes two coating frames 31 arranged in a front-to-back configuration, a coating steel roller 32, a base 33, a coating die head 34, two push cylinders 35, a first coating roller 361, a second coating roller 362, a third coating roller 363, a fourth coating roller 364, a fifth coating roller 365, a sixth coating roller 366, a seventh coating roller 367, a rubber roller assembly 37, and an adjusting assembly 38.
[0037] The base 33 and the coating steel roller 32 are located between two coating racks 31. The two ends of the base 33 are slidably mounted on the two coating racks 31. Specifically, each coating rack 31 has two slide rails, the length of which is the same as the length of the coating rack 31. Each end of the base 33 has two sliders, which slide in cooperation with the two slide rails. The coating steel roller 32 is located on one side of the base 33, for example, on the right side. Both ends of the coating steel roller 32 are rotatably mounted on the two coating racks 31 via two steel roller bearing seats. The coating die 34 is opposite to the coating steel roller 32 and is located at the top of the base 33. A portion of the coating die 34 protrudes from the side of the base 33 closest to the coating steel roller 32. Two push cylinders 35 are located between two coating racks 31 and are arranged in a front-to-back manner. The two push cylinders 35 are respectively mounted on the two coating racks 31. The output ends of the two push cylinders 35 are respectively connected to the base 33. The two push cylinders 35 are used to drive the base 33 to move towards or away from the coating steel roller 32, thereby driving the coating die head 33 to move towards or away from the coating steel roller 32.
[0038] In this embodiment, two push cylinders 35 are located below the base 33. The bottom end of the base 33 is provided with two mounting parts 351. The output ends of the two push cylinders 35 are respectively connected to the two mounting parts 351. The two push cylinders 35 are used to drive the two mounting parts 351 to move towards or away from the coating steel roller 32, thereby driving the base 33 to move towards or away from the coating steel roller 32.
[0039] The first coating roller 361, the second coating roller 362, the third coating roller 363, the fourth coating roller 364, the fifth coating roller 365, the sixth coating roller 366, and the seventh coating roller 367 are used to support the substrate 100. The first coating roller 361, the second coating roller 362, the third coating roller 363, the fourth coating roller 364, the fifth coating roller 365, the sixth coating roller 366, and the seventh coating roller 367 are all located between two coating racks 31. The two ends of the first coating roller 361, the second coating roller 362, the third coating roller 363, the fourth coating roller 364, the fifth coating roller 365, the sixth coating roller 366, and the seventh coating roller 367 are rotatably mounted on the two coating racks 31 through two coating roller bearing seats. The first coating roller 361, the second coating roller 362, and the third coating roller 363 are arranged sequentially from left to right below the base 33 and the coating steel roller 32 along the travel path of the substrate 100. The fourth coating roller 364 is arranged above the third coating roller 363 along the travel path of the substrate 100. The fifth coating roller 365 is arranged above the fourth coating roller 364 along the travel path of the substrate 100 and is located on the side of the coating steel roller 32 away from the base 33, i.e., to the right of the coating steel roller 32. The sixth coating roller 366 is arranged above the fifth coating roller 365 along the travel path of the substrate 100 and is located on the side of the coating steel roller 32 away from the base 33, i.e., to the right of the coating steel roller 32. The seventh coating roller 367 is arranged on the side of the sixth coating roller 366 away from the coating steel roller 32 along the travel path of the substrate 100, i.e., to the right of the sixth coating roller 366. In practical applications, the substrate 100 passes around the left side of the unwinding tension adjusting mechanism 20's swing roller 231 and then sequentially passes around the bottom of the first coating roller 361, the top of the second coating roller 362, the bottom of the third coating roller 363, the left side of the fourth coating roller 364, the top of the fifth coating roller 365, the left side of the coating steel roller 32, the top of the sixth coating roller 366, and the top of the seventh coating roller 367. Bypassing the first coating roller 361, the second coating roller 362, the third coating roller 363, the fourth coating roller 364, the fifth coating roller 365, the coating steel roller 32, the sixth coating roller 366, and the seventh coating roller 367, the substrate 100 can be supported respectively. The coating die head 34 is driven by two push cylinders 35 to move towards the coating steel roller 32, so that the slurry can be coated onto the substrate 100 through the coating die head 34.
[0040] The roller assembly 37 is used to press the substrate 100 onto the coating steel roller 32 to break the tension on the substrate 100, facilitating the coating die 34 to apply the slurry onto the substrate 100. Specifically, in conjunction with... Figure 6As shown, the rubber roller assembly 37 includes a rubber roller 371, two V-shaped swing arms 373, a connecting shaft 372, and two swing arm cylinders 374. The rubber roller 371 is located below the coating steel roller 32, and the connecting shaft 372 is located on the side of the rubber roller 371 away from the coating die head 34, i.e., to the right of the rubber roller 371. The connecting shaft 372 is located between the two coating frames 31, and its two ends are respectively mounted on the two coating frames 31, specifically, the two ends of the connecting shaft 372 are respectively fixed in the connecting shaft mounting holes of the two coating frames 31. Two swing arms 373 are arranged in a front-to-back configuration and rotatably mounted on the connecting shaft 372. In this embodiment, a first swing arm through hole is provided at the center of each swing arm 373. The two swing arms 373 are rotatably mounted on the connecting shaft 372 through their respective first swing arm through holes. A swing arm bearing is provided in the first swing arm through hole, and the swing arm bearing is mounted on the connecting shaft 372 to provide rotational support for the corresponding swing arm 373. Each swing arm 373 has a first end and a second end. The first end of the swing arm 373 is located below the coating steel roller 32, and the second end of the swing arm 373 is located on the side of the connecting shaft 372 away from the rubber roller 371, that is, on the right side of the connecting shaft 372 and below the connecting shaft 372. The two ends of the rubber roller 371 are rotatably disposed at the first ends of the two swing arms 373. In this embodiment, the first end of the swing arm 373 is provided with a second swing arm through hole. The two ends of the rubber roller 371 are rotatably disposed in the second swing arm through hole of the first end of the two swing arms 373 through two rubber roller bearings. The rubber roller bearings can provide rotational support for the rubber roller 371. Two swing arm cylinders 374 are arranged in a front-to-back configuration between two coating racks 31, tilted upwards relative to the coating racks 31. The two swing arm cylinders 374 are located on the side of the connecting shaft 372 furthest from the rubber roller 371, i.e., to the right of the connecting shaft 372. The two swing arm cylinders 374 are respectively mounted on the two coating racks 31 via two swing arm cylinder seats 3741. The output ends of the two swing arm cylinders 374 are rotatably connected to the second ends of the two swing arms 373. The two swing arm cylinders 374 drive the two swing arms 373 to rotate around the axis of the connecting shaft 372, thereby causing the rubber roller 371 to move closer to or away from the coating steel roller 32. By moving the rubber roller 371 closer to the coating steel roller 32, the substrate 100 can be pressed onto the coating steel roller 32 via the rubber roller 371.
[0041] The output ends of the two rocker arm cylinders 374 are rotatably connected to the second ends of the two rocker arms 373 respectively. Specifically, two rocker arm shafts 3731 are provided on the side of the second ends of the two rocker arms 373 that are close to each other. The output ends of the two rocker arm cylinders 374 are rotatably connected to the two rocker arm shafts 3731 respectively through two fisheye connectors 3742.
[0042] The adjusting assembly 38 includes two screw slides 381 arranged in a front-to-back configuration and two wedge blocks 382. The two screw slides 381 are located between and on the two coating racks 31, respectively. The two screw slides 381 are located below the second ends of the two swing arms 373. The two wedge blocks 382 are connected to the two screw slides 381, and the top of the wedge block 382 has an inclined surface 3821 that slopes downward. The second ends of the two swing arms 373 are provided with two rollers 3732, which slide in contact with the inclined surfaces 3821 of the two wedge blocks 382. The screw slide 381 drives the corresponding wedge block 382 to move towards or away from the coating die head 34, i.e., to move left or right. Under the action of the inclined surface 3821 of the two wedge blocks 382, the two swing arms 373 can be pushed to rotate around the axis of the connecting shaft 372, thereby driving the rubber roller 371 to move closer to or away from the coating steel roller 32. In this way, the pressing force of the rubber roller 371 pressing the substrate 100 onto the coating steel roller 32 can be adjusted. The screw slide 381 is an existing structure, and its structure will not be described in detail here.
[0043] Combination Figures 7 to 10 As shown, the magnetic field generating mechanism 40 is used to generate a magnetic field to magnetize the conductive particles 1 in the slurry of the substrate 100, so that the conductive particles 1 can be arranged in an orderly manner along the thickness direction of the substrate 100, such as... Figure 12 As shown, this increases the energy density and conductivity speed of the electrode in a single direction, thereby improving the performance of the lithium battery. Specifically, the magnetic field generating mechanism 40 includes a base 41, an annular yoke 42, a lower electrode post 43, an upper electrode post 44, a lower coil 45, an upper coil 46, a first roller 491, and a second roller 492.
[0044] The bottom end of the annular yoke 42 is located at the top of the base 41, which provides mounting support for the annular yoke 42. The upper pole post 44 and the lower pole post 43 are arranged vertically opposite each other. The lower pole post 43 is located in the lower through hole at the bottom end of the annular yoke 42, with one end protruding from the bottom end of the annular yoke 42 and accommodated in the groove at the top of the base 41. The other end of the lower pole post 43 extends into the interior of the annular yoke 42. The upper pole post 44 is located in the upper through hole at the top of the annular yoke 42, with one end protruding from the top of the annular yoke 42. The other end of the upper pole post 44 extends into the interior of the annular yoke 42, forming an air gap between the other end of the upper pole post 44 and the other end of the lower pole post 43. The lower coil 45 is located inside the annular yoke 42 and wound on the lower pole post 43. The upper coil 46 is located inside the annular yoke 42 and wound on the upper pole post 44. The end of the upper coil 46 and the beginning of the lower coil 45 are electrically connected. The beginning of the upper coil 46 and the end of the lower coil 45 are respectively used to electrically connect to the positive and negative poles of the external power supply.
[0045] In this embodiment, the lower pole post 43 is fitted with a lower connector 431, which is located outside the annular yoke 42 and fixed to the bottom end of the annular yoke 42. The lower connector 431 is accommodated in an annular groove at the top of the base 41, and the annular groove surrounds and communicates with the groove. The upper pole post 44 is fitted with an upper connector 441, which is located outside the annular yoke 42 and fixed to the top end of the annular yoke 42. The lower connector 431 can fix the lower pole post 43 and the annular yoke 42 together, and the upper connector 441 can fix the upper pole post 44 and the annular yoke 42 together.
[0046] A lower pole post 43 is fitted with a lower coil frame 47, which is located inside the annular yoke 42. The lower coil 45 is wound around the lower coil frame 47. Two first ring portions 471 are formed at the top and bottom of the outer wall of the lower coil frame 47, respectively. A lower sealing plate 472 is provided between the two first ring portions 471, forming a lower space between the lower sealing plate 472, the two first ring portions 471, and the lower coil frame 47. The lower coil 45 is located within this lower space. The lower sealing plate 472 has a first through hole and a second through hole corresponding to the beginning and end of the lower coil 45, respectively. The beginning and end of the lower coil 45 pass through the first and second through holes and are located outside the lower space. The lower coil frame 47 provides support for the lower coil 45, while the two first ring portions 471 and the lower sealing plate 472 protect the lower coil 45, preventing damage.
[0047] An upper coil frame 48 is fitted onto the upper pole post 44. The upper coil frame 48 is located inside the annular yoke 42, and the upper coil 46 is wound around the upper coil frame 48. Two second ring portions 481 are formed at the top and bottom of the outer wall of the upper coil frame 48, respectively. An upper sealing plate 482 is provided between the two second ring portions 481, forming an upper space between the upper sealing plate, the two second ring portions 481, and the upper coil frame 48. The upper coil 46 is located within this upper space. The upper sealing plate 482 has a third through hole and a fourth through hole corresponding to the beginning and end of the upper coil 46, respectively. The beginning and end of the upper coil 46 pass through the third through hole and the fourth through hole, respectively, and are located outside the upper space. The upper coil frame 48 provides support for the upper coil 46, while the two second ring portions 481 and the upper sealing plate 482 protect the upper coil 46, preventing damage to it.
[0048] The first roller 491 and the second roller 492 are used to support the substrate 100. The two ends of the first roller 491 are rotatably mounted on two first mounting plates 4911 via two first roller bearing seats. The two first mounting plates 4911 are respectively located on the side of the annular yoke 42 near the coating mechanism 30. The two ends of the second roller 492 are rotatably mounted on two second mounting plates 4921 via two second roller bearing seats. The two second mounting plates 4921 are respectively located on the side of the annular yoke 42 near the oven 50. The apex of the outer peripheral surface of the first roller 491, the center of the air gap, and the apex of the outer peripheral surface of the second roller 492 are all located in the same horizontal plane. This structure ensures that the substrate 100 is horizontal when passing through the air gap, thereby ensuring that the substrate 100 is perpendicular to the magnetic field lines.
[0049] In practical applications, after the upper coil 46 and the lower coil 45 are energized, the current flows through the upper coil 46 and the lower coil 45. At this time, the upper coil 46 and the lower coil 45 can generate a magnetic field. Under the influence of the magnetic field of the upper coil 46, the irregularly arranged ferromagnetic metal atoms inside the upper pole 44 and the lower pole 43 are rearranged in a regular manner, pointing in the same direction, thus becoming magnetized and increasing the magnetic flux. This generates a considerable amount of magnetic flux between the yoke 42, the upper pole 44, the lower pole 43 and the air gap. At this time, the other end of the lower pole 43 is the N pole and the other end of the upper pole 44 is the S pole. Thus, a magnetic field is formed in the air gap. The principle of generating a magnetic field is the same as that of existing magnetic field generating devices. After the substrate 100 passes over the seventh coating roller 367 and over the first roller 491, it first enters the annular yoke 42, then passes through the air gap, then exits from the annular yoke 42 and passes over the second roller 492. The first roller 491 and the second roller 492 can support the substrate 100. When the substrate 100 passes through the air gap, it is perpendicular to the magnetic field lines. The magnetic field can magnetize the conductive particles 1 in the slurry of the substrate 100, so that the conductive particles 1 can be arranged in an orderly manner along the thickness direction of the substrate 100. This can increase the energy density and conductivity speed of the electrode in a single direction, thereby improving the performance of the lithium battery.
[0050] Oven 50 is used to heat and dry the slurry on substrate 100. Oven 50 is a conventional type, such as a hot air oven or an infrared oven.
[0051] Combination Figure 11As shown, the winding tension adjustment mechanism 60 is used to adjust the tension of the substrate 100 to prevent the substrate 100 from wrinkling or breaking. The winding tension adjustment mechanism 60 and the unwinding tension adjustment mechanism 20 are arranged symmetrically from left to right, and their structures are the same. The structure of the winding tension adjustment mechanism 60 will not be described in detail here. In practical applications, the substrate 100 passes around the left side of the tension detection roller 22 of the winding tension adjustment mechanism 60, and then around the right side of the swing roller 231 of the winding tension adjustment mechanism 60. The tension of the substrate 100 can be detected by the tension detection roller 22 of the winding tension adjustment mechanism 60. The tension swing roller assembly 23 of the winding tension adjustment mechanism 60 can adjust the tension of the substrate 100 according to the tension value detected by the tension detection roller 22. For example, when the tension of the substrate 100 increases, the two tension swing arm cylinders 234 of the winding tension adjustment mechanism 60 drive the two tension swing arms 233 of the winding tension adjustment mechanism 60 to rotate clockwise around the axis of the rotating shaft 232, thereby driving the winding tension adjustment mechanism. The oscillating roller 231 of the winding tension adjustment mechanism 60 rotates clockwise around the axis of the rotating shaft 232, reducing the distance between the oscillating roller 231 and the tension detection roller 22 of the winding tension adjustment mechanism 60. This reduces the tension of the substrate 100. When the tension of the substrate 100 decreases, the two tension swing arm cylinders 234 of the winding tension adjustment mechanism 60 drive the two tension swing arms 233 of the winding tension adjustment mechanism 60 to rotate counterclockwise around the axis of the rotating shaft 232. This causes the oscillating roller 231 of the winding tension adjustment mechanism 60 to rotate counterclockwise around the axis of the rotating shaft 232, increasing the distance between the oscillating roller 231 and the tension detection roller 22 of the winding tension adjustment mechanism 60. This increases the tension of the substrate 100.
[0052] Combination Figure 11As shown, the winding mechanism 70 is used to wind up the substrate 100. The winding mechanism 70 includes two winding frames 71 arranged in a front-to-back configuration, a winding shaft 72, and a winding motor. The winding shaft 72 is located between the two winding frames 71. One end of the winding shaft 72 is rotatably mounted in a mounting hole of one of the winding frames 71, for example, the winding frame 71 located in front. The other end of the winding shaft 72 passes through a mounting hole of the other winding frame 71, for example, the winding frame 71 located in the rear, and is connected to the output end of the winding motor. The winding motor is mounted on the other winding frame 71 and is used to drive the winding shaft 72 to rotate. The rotation of the winding shaft 72 enables the winding of the substrate 100. A winding bearing is provided in the mounting hole of the winding frame 71, and the winding bearing is sleeved on the winding shaft 72 to provide rotational support for the winding shaft 72. In this embodiment, there are two take-up shafts 72, which are arranged left and right at an interval. One take-up shaft 72 is close to the side of the take-up frame 71 away from the oven 50, and the other take-up shaft 72 is close to the side of the take-up frame 71 close to the oven 50. The number of take-up motors corresponds to the number of take-up shafts 72, which is also two. In actual application, when the substrate 100 being taken up by one take-up shaft 72 is almost fully rolled up, the substrate 100 is cut and wound onto the other take-up shaft 72, thus achieving take-up switching. Then, the take-up motor corresponding to the other take-up shaft 72 drives the other take-up shaft 72 to rotate, so that the substrate 100 can be taken up by the other take-up shaft 72.
[0053] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.
Claims
1. A coating machine, comprising an unwinding mechanism, a coating mechanism, an oven, and a rewinding mechanism arranged sequentially along a substrate travel path, characterized in that, It also includes a magnetic field generating mechanism disposed between the coating mechanism and the oven mechanism along the travel path of the substrate. The magnetic field generating mechanism includes a base, an annular yoke, a lower pole, an upper pole, a lower coil, and an upper coil. The bottom end of the annular yoke is disposed at the top end of the base. The upper and lower poles are disposed vertically opposite each other. The lower pole is disposed in a lower through hole at the bottom end of the annular yoke, with one end protruding from the bottom end of the annular yoke and accommodated in a groove at the top end of the base, and the other end extending into the interior of the annular yoke. The upper pole is disposed... The upper pole is placed in the upper through hole at the top of the annular yoke, with one end protruding from the top of the annular yoke and the other end extending into the interior of the annular yoke. An air gap is formed between the other end of the upper pole and the other end of the lower pole. The lower coil is located inside the annular yoke and wound around the lower pole. The upper coil is located inside the annular yoke and wound around the upper pole. The end of the upper coil and the beginning of the lower coil are electrically connected. The beginning of the upper coil and the end of the lower coil are respectively used to electrically connect to the positive and negative terminals of an external power source.
2. The coating machine according to claim 1, characterized in that, The lower pole post is fitted with a lower connector, which is located outside the annular yoke and fixed to the bottom end of the annular yoke. The lower connector is accommodated in the annular groove at the top of the base, which surrounds the groove and communicates with the groove.
3. The coating machine according to claim 1, characterized in that, The upper pole post is fitted with an upper connector, which is located outside the annular yoke and fixed to the top of the annular yoke.
4. The coating machine according to claim 1, characterized in that, The lower pole post is fitted with a lower coil frame, which is located inside the annular yoke. The lower coil is wound on the lower coil frame. The top and bottom ends of the outer wall of the lower coil frame each form two first ring portions. A lower sealing plate is provided between the two first ring portions. A lower space is formed between the lower sealing plate, the two first ring portions, and the lower coil frame. The lower coil is located in the lower space. The lower sealing plate has a first through hole and a second through hole corresponding to the beginning and end ends of the lower coil, respectively. The beginning and end ends of the lower coil pass through the first through hole and the second through hole, respectively, and are located outside the lower space.
5. The coating machine according to claim 1, characterized in that, The upper pole post is fitted with an upper coil frame, which is located inside the annular yoke. The upper coil is wound on the upper coil frame. The top and bottom ends of the outer wall of the upper coil frame are respectively formed with two second ring portions. An upper sealing plate is provided between the two second ring portions. An upper space is formed between the upper sealing plate, the two second ring portions and the upper coil frame. The upper coil is located in the upper space. The upper sealing plate has a third through hole and a fourth through hole corresponding to the first end and the last end of the upper coil, respectively. The first end and the last end of the upper coil pass through the third through hole and the fourth through hole, respectively and are located outside the upper space.
6. The coating machine according to claim 1, characterized in that, The magnetic field generating mechanism further includes a first roller and a second roller. The two ends of the first roller are rotatably mounted on two first mounting plates, and the two first mounting plates are respectively mounted on the side of the annular yoke near the coating mechanism. The two ends of the second roller are rotatably mounted on two second mounting plates, and the two second mounting plates are respectively mounted on the side of the annular yoke near the oven. The apex of the outer peripheral surface of the first roller, the center of the air gap, and the apex of the outer peripheral surface of the second roller are all located in the same horizontal plane.
7. The coating machine according to claim 1, characterized in that, The coating mechanism includes two coating racks arranged opposite each other, a coating steel roller, a base, a coating die, and two push cylinders. The two ends of the base are slidably mounted on the two coating racks. The coating steel roller is located on one side of the base, and its two ends are rotatably mounted on the two coating racks. The coating die is opposite to the coating steel roller and is located at the top of the base, with a portion protruding from the side of the base near the coating steel roller. The two push cylinders are arranged opposite each other and are respectively mounted on the two coating racks. The output ends of the two push cylinders are respectively connected to the base. The two push cylinders drive the base to move towards or away from the coating steel roller, thereby driving the coating die to move towards or away from the coating steel roller.
8. The coating machine according to claim 7, characterized in that, The coating mechanism further includes a rubber roller assembly, which includes a rubber roller, two swing arms, a connecting shaft, and two swing arm cylinders. The rubber roller is located below the coating steel roller, and the connecting shaft is located on the side of the rubber roller away from the coating die head. The two ends of the connecting shaft are respectively mounted on the two coating frames. The two swing arms are arranged opposite to each other and rotatably mounted on the connecting shaft. The two ends of the rubber roller are rotatably mounted on the first ends of the two swing arms. The two swing arm cylinders are arranged opposite to each other, and the connecting shaft is located between the rubber roller and the two swing arm cylinders. The two swing arm cylinders are respectively mounted on the two coating frames, and the output ends of the two swing arm cylinders are rotatably connected to the second ends of the two swing arms. The two swing arm cylinders are used to drive the two swing arms to rotate around the axis of the connecting shaft, thereby driving the rubber roller closer to or away from the coating steel roller.
9. The coating machine according to claim 8, characterized in that, The coating mechanism further includes an adjustment assembly, which comprises two opposing screw slides and two wedge blocks. The two screw slides are respectively disposed on the two coating frames and located below the second ends of the two swing arms. The two wedge blocks are respectively connected to the two screw slides. The screw slides are used to drive the corresponding wedge blocks to move toward or away from the coating die head. The top of the wedge block has an inclined surface. The second ends of the two swing arms are respectively provided with two rollers, and the two rollers slide in contact with the inclined surfaces of the two wedge blocks.
10. The coating machine according to claim 1, characterized in that, The coating machine also includes an unwinding tension adjusting mechanism disposed between the unwinding mechanism and the coating mechanism along the travel path of the substrate, and a winding tension adjusting mechanism disposed between the oven and the winding mechanism.