Pole strip drying device

Abstract

The present invention discloses a pole piece strip drying device, comprising a chassis and an unwinding mechanism, a drying mechanism, a cooling mechanism and a rewinding mechanism which are sequentially built into the chassis, wherein a feeding chamber, a drying chamber, a cooling chamber and a rewinding chamber are spaced apart inside the chassis, wherein the feeding chamber, the drying chamber, the cooling chamber and the rewinding chamber are all connected with a vacuum exhaust pipe, the unwinding mechanism is built into the feeding chamber for releasing the rolled pole piece strip, the drying mechanism is built into the drying chamber, the drying mechanism comprises a plurality of heating rollers which are arranged at intervals, the pole piece strip is sequentially wound around the heating rollers for heating and drying the pole piece strip, the cooling mechanism is built into the cooling chamber, the cooling mechanism comprises a plurality of cooling rollers which are arranged at intervals, the pole piece strip is sequentially wound around the cooling rollers for cooling the pole piece strip which has been dried, and the rewinding mechanism is built into the rewinding chamber for recycling the pole piece strip which has been dried and cooled into a roll; the pole piece strip drying device of the present invention has the characteristics of high heating efficiency and low energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field related to lithium battery manufacturing, and in particular to a pole piece strip drying device. Background Art

[0002] At present, the lithium battery industry at home and abroad has a good development prospect. Lithium-ion batteries have been widely used in portable appliances such as laptops, cameras, and mobile communications with their unique performance advantages. The large-capacity lithium-ion batteries currently developed have begun to be tried in electric vehicles and are expected to become one of the main power sources for electric vehicles in the 21st century. They will also be more widely used in artificial satellites, aerospace, and energy storage. With the shortage of energy and the huge pressure on the world's environmental protection. Lithium batteries are now widely used in the electric vehicle industry, especially the emergence of lithium iron phosphate batteries, which has further promoted the development and application of the lithium battery industry. In order to ensure the high quality of lithium batteries, it is necessary to strictly control the production environment of each process in the production process of lithium batteries. In the production process of lithium batteries, a drying furnace is required to dry the battery shell, pole piece, pole roll and battery cell.

[0003] There are two types of drying equipment currently in production. One is to bake the cut material under normal pressure, and the other is to bake the whole roll material in a vacuum box. Both baking methods take a long time and are prone to uneven heating. Although these mechanisms can roughly meet the use requirements, their efficiency is too slow, resulting in a waste of production capacity resources. If you want to increase production capacity, you can only increase the number of equipment invested, resulting in excessively high overall costs. Summary of the invention

[0004] The object of the present invention is to provide a pole piece strip drying device with low energy consumption and high drying efficiency, so as to overcome the shortcomings existing in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A pole piece strip drying device comprises a chassis and an unwinding mechanism, a drying mechanism, a cooling mechanism and a winding mechanism which are sequentially built into the chassis;

[0007] The inside of the chassis is separated by a feeding chamber, a drying chamber, a cooling chamber and a receiving chamber, and the feeding chamber, the drying chamber, the cooling chamber and the receiving chamber are all connected to a vacuum exhaust pipe;

[0008] The unwinding mechanism is built into the feeding chamber and is used to release the rolled pole piece strip;

[0009] The drying mechanism is built in the drying chamber, and the drying mechanism includes a plurality of heating rollers arranged at intervals, and the electrode strip is sequentially wound around each of the heating rollers to heat and dry the electrode strip;

[0010] The cooling mechanism is built into the cooling chamber, and the cooling mechanism includes a plurality of cooling rollers arranged at intervals, and the pole piece strip is sequentially wound around each of the cooling rollers to cool the pole piece strip after drying;

[0011] The winding mechanism is built into the receiving chamber and is used to recycle the pole piece strip that has been dried and cooled into a coil.

[0012] In one of the embodiments, the unwinding mechanism includes an unwinding shaft, a guide roller and a tape splicing assembly, the unwinding shaft is connected to the chassis, the guide roller is arranged on one side of the unwinding shaft, the tape splicing assembly is arranged on one side of the guide roller, and the tape splicing assembly is used to connect the new and old rolls of pole piece strips.

[0013] In one embodiment, the belt connecting assembly includes a mounting box, a pressure plate and a belt connecting power member, the mounting box is mounted at the bottom of the feed chamber, the pressure plate is telescopically connected to the mounting box, the belt connecting power member is built into the mounting box, and the belt connecting power member is used to drive the pressure plate away from or close to the mounting box.

[0014] In one embodiment, the unwinding mechanism also includes a first deflection correction component and a material unwinding tension adjustment component, the first deflection correction component includes a first base, a first frame and a first deflection correction sensor, the first base is arranged on one side of the chassis, the first frame is slidably arranged on the first base, the unwinding shaft and the guide roller are installed on the first frame, the first deflection correction sensor is arranged between the guide roller and the belt connecting assembly, the material unwinding tension adjustment component includes a first mounting plate, a first tension sensor and a first tension roller, one end of the first mounting plate is fixedly connected to the feed chamber, the first tension sensor is installed on the first mounting plate, and the first tension roller is installed on the side of the first tension sensor away from the first mounting plate.

[0015] In one embodiment, the unwinding mechanism also includes an unwinding sealing assembly, a first roller and a second roller, the unwinding sealing assembly includes a first support plate, a first push plate and a first push-belt power component, the first support plate is arranged on the side of the feed chamber close to the drying chamber, the first push plate is telescopically connected to the first support plate, the first push-belt power component is installed on the first support plate to drive the first push plate to approach or move away from the first support plate, the first roller is arranged between the belt connecting assembly and the unwinding tension adjustment assembly, and the second roller is arranged between the unwinding tension adjustment assembly and the unwinding sealing assembly.

[0016] In one embodiment, the heating roller has a built-in electromagnetic induction heating element.

[0017] In one embodiment, the drying mechanism further includes a third roller and a fourth roller, the third roller is arranged on a side of the drying chamber close to the feeding chamber, and the fourth roller is arranged on a side of the drying chamber close to the cooling chamber.

[0018] In one of the embodiments, a flow channel for circulating a refrigerant is provided inside the cooling roller.

[0019] In one embodiment, the cooling mechanism further includes a fifth roller and a sixth roller, the fifth roller is arranged on a side of the cooling chamber close to the drying chamber, and the sixth cooling chamber is arranged on a side of the cooling chamber close to the material receiving chamber.

[0020] In one embodiment, the winding mechanism includes a winding sealing assembly, a second deviation correction assembly, a seventh roller, a material receiving tension adjustment assembly, an eighth roller and a winding shaft, the winding sealing assembly is arranged on the side of the material receiving chamber close to the cooling chamber, the second deviation correction assembly is used to monitor and correct the pole piece strip, the material receiving tension adjustment assembly is arranged on the side of the winding sealing assembly away from the cooling chamber, the seventh roller and the eighth roller are respectively arranged on opposite sides of the material receiving tension adjustment assembly, and the winding shaft is connected to the chassis.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The electrode strip drying device of the present invention performs a vacuum treatment on the inside of a chassis, utilizes the characteristic that the boiling point of water decreases in a vacuum environment, and the water will quickly dissipate along the vacuum exhaust duct after vaporization, and will not re-condense inside the chassis when the temperature decreases. Therefore, the electrode strip is dried in a vacuum environment and then cooled to room temperature, which can save drying time and improve drying efficiency; the electrode strip is heated by arranging multiple heating rollers, and the electrode strip is sequentially wound around each heating roller, so that the continuous heating time is long, and the front and back sides of the electrode strip are heated alternately, ensuring that the electrode strip is heated evenly; similarly, by sequentially winding the electrode strip around each cooling roller, it can be ensured that the electrode strip is fully in contact with the cooling roller and the cooling is accelerated; in addition, heat can only be transferred through contact in a vacuum environment, which is beneficial to reduce ineffective heat dissipation and reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a pole piece strip drying device of a preferred embodiment of the present invention;

[0024] Figure 2 for Figure 1 Another perspective schematic diagram of the pole piece strip drying device shown;

[0025] Figure 3 for Figure 1A front view of the pole piece strip drying device is shown, wherein the sealing door is not shown;

[0026] Figure 4 for Figure 3 The structural schematic diagram of the strip splicing assembly in the pole piece strip drying device shown;

[0027] Figure 5 for Figure 3 The schematic diagram of the structure of the discharge tension adjustment assembly in the pole piece strip drying device shown;

[0028] Figure 6 for Figure 3 The schematic diagram of the structure of the unwinding sealing assembly in the pole piece strip drying device is shown.

[0029] Notes on the attached drawings:

[0030] Pole strip drying device 100;

[0031] Chassis 10, feeding chamber 11, drying chamber 12, cooling chamber 13, receiving chamber 14, vacuum exhaust pipe 15, sealing door 16; unwinding mechanism 20, unwinding shaft 21, guide roller 22, first deviation correction component 23, first machine base 231, first frame 232, first deviation correction sensor 233, belt connection component 24, installation box 241, pressure plate 242, belt connection power part 243, first over-roller 25, unwinding tension adjustment component 26, first installation plate 261, first tension sensor 262, first tension roller 263, second over-roller Roller 27, unwinding sealing assembly 28, first support plate 281, first push plate 282, first push belt power part 283; drying mechanism 30, third passing roller 31, heating roller 32, fourth passing roller 33; cooling mechanism 40, fifth passing roller 41, cooling roller 42, sixth passing roller 43; winding mechanism 50, winding sealing assembly 51, second deviation correction assembly 52, second machine base 521, second frame 522, second deviation correction sensor 523, seventh passing roller 53, material receiving tension adjustment assembly 54, eighth passing roller 55, winding shaft 56. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When the number of an element is referred to as "plurality", it may be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0035] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings:

[0036] See also Figures 1 to 6 , which is a preferred embodiment of the present invention, is a pole piece strip drying device 100, comprising a chassis 10 and a roll-up mechanism 20, a drying mechanism 30, a cooling mechanism 40 and a roll-up mechanism 50 which are sequentially built into the chassis 10; a feeding chamber 11, a drying chamber 12, a cooling chamber 13 and a roll-up chamber 14 are arranged in the chassis 10, and the feeding chamber 11, the drying chamber 12, the cooling chamber 13 and the roll-up chamber 14 are all connected with a vacuum exhaust pipe 15; the roll-up mechanism 20 is built into the feeding chamber 11, and is used to release the rolled pole piece strip. The pole piece strip; the drying mechanism 30 is built in the drying chamber 12, and the drying mechanism 30 includes a plurality of heating rollers 32 arranged at intervals, and the pole piece strip is sequentially wound around each heating roller 32 to heat and dry the pole piece strip; the cooling mechanism 40 is built in the cooling chamber 13, and the cooling mechanism 40 includes a plurality of cooling rollers 42 arranged at intervals, and the pole piece strip is sequentially wound around each cooling roller 42 to cool the pole piece strip after drying; the winding mechanism 50 is built in the receiving chamber 14, and is used to recycle the pole piece strip after drying and cooling into a roll. The pole piece strip drying device 100 of the present invention has the characteristics of high heating efficiency and low energy consumption.

[0037] like Figure 1 and Figure 2As shown, the inside of the chassis 10 is separated by a feed chamber 11, a drying chamber 12, a cooling chamber 13 and a receiving chamber 14, and the feed chamber 11, the drying chamber 12, the cooling chamber 13 and the receiving chamber 14 are all connected with a vacuum exhaust pipe 15, and the vacuum exhaust pipe 15 is connected with an external vacuum pumping device to extract the air inside the chassis 10, so that the inside of the chassis 10 is in a vacuum state. In order to facilitate the installation of the material belt and ensure the sealing of the feed chamber 11, the drying chamber 12, the cooling chamber 13 and the receiving chamber 14, the chassis 10 is also provided with a sealing door 16. Furthermore, in order to prevent heat transfer from affecting the drying efficiency and to avoid high temperature from interfering with other components, a first partition (not marked in the figure) is provided between the feed 11 and the drying chamber 12, and a through hole for the electrode strip to pass through is provided on the first partition. Similarly, a second partition (not marked in the figure) is provided between the drying chamber 12 and the cooling chamber 13, and a through hole for the electrode strip to pass through is also provided on the second partition. A third partition (not marked in the figure) is provided between the cooling chamber 13 and the receiving chamber 14, and a through hole for the electrode strip to pass through is provided on the third partition. Further, in order to improve the strength of the chassis 10, prevent the chassis 10 from deforming when vacuuming, and reduce the space inside the chassis 10 to reduce the energy consumption required for vacuuming, a number of support members (not marked in the figure) are provided inside the chassis 10, and the two ends of the support members are respectively abutted against the sealing door 16 and the bottom plate of the chassis 10, and the support members occupy the redundant internal space of the chassis 10, leaving only space for installing other components and space for the electrode strip to pass through.

[0038] like Figures 2 to 6As shown, the unwinding mechanism 20 includes an unwinding shaft 21, a guide roller 22, a first deviation correction assembly 23 and a belt connection assembly 24. The unwinding shaft 21 is connected to the chassis 10, and the guide roller 22 is arranged on one side of the unwinding shaft 21. The first deflection correction component 23 is used to monitor whether the electrode strip is offset, and dynamically adjust the position of the electrode strip according to the monitoring result; further, the first deflection correction component 23 includes a first base 231, a first frame 232 and a first deflection correction sensor 233, the first base 231 is arranged on the side of the drying chamber 12 away from the sealing door, the first frame 232 is slidably arranged on the first base 231, the unwinding shaft 21 and the guide roller 22 are installed on the first frame 232, and the first deflection correction sensor 233 is arranged between the guide roller 22 and the tape connecting component 24; the first deflection correction sensor 233 is used to dynamically monitor whether the electrode strip is offset during the unwinding process, and feed back the monitoring structure to the frame moving power part (not shown) on the first frame 232, and the frame moving power part dynamically fine-tunes the relative position of the first frame 232 and the first base 231 according to the monitoring result to ensure that the electrode strip will not be offset during the unwinding process. The tape splicing assembly 24 is disposed on one side of the guide roller 22. The tape splicing assembly 24 is used to connect the old and new rolls of pole piece tape. When the previous roll of pole piece tape is unwound, a new roll of pole piece tape is replaced. The tail of the previous roll of pole piece tape and the head of the new roll of pole piece tape are clamped by the tape splicing assembly 24, and then the two are connected with tape to ensure the continuity of the drying process. The tape splicing assembly 24 includes a mounting box 241, a pressure plate 242, and a tape splicing power member 243. The mounting box 241 is mounted at the bottom of the feed chamber 11. The pressure plate 242 and the mounting box 241 are telescopically connected. The pole piece tape passes between the pressure plate 242 and the top of the mounting box 241. The tape splicing power member 243 is built into the mounting box 241. The tape splicing power member 243 is used to drive the pressure plate 242 away from or close to the mounting box 241; Figure 4 As shown, there are two pressing plates 242. When connecting two rolls of pole piece strips, the two pressing plates 242 are used to press the tail of the previous roll of pole piece strip and the head of the new roll of pole piece strip respectively, and then the operator uses tape to stick the two together to complete the connection between the old and new pole piece strips. In this embodiment, the connecting power member 243 is a cylinder.

[0039] like Figure 3As shown, the unwinding mechanism 20 further includes a first over-roller 26, an unwinding tension adjustment assembly 26 and a second over-roller 27. The unwinding tension adjustment assembly 26 is arranged on the side of the tape splicing assembly 24 away from the guide roller 22, and the first over-roller 26 and the second over-roller 27 are respectively arranged on opposite sides of the unwinding tension adjustment assembly 26. The unwinding tension adjustment assembly 26 includes a first mounting plate 261, a first tension sensor 262 and a first tension roller 263. One end of the first mounting plate 261 is fixedly connected to the feed chamber 11, the first tension sensor 262 is mounted on the first mounting plate 261, and the first tension roller 263 is mounted on the side of the first tension sensor 262 away from the first mounting plate 261. The unwinding tension adjustment assembly 26 monitors the tension of the pole piece strip through the first tension sensor 262, and dynamically adjusts the tension of the pole piece strip through the magnetic powder clutch (not shown) connected to the end of the unwinding shaft 21 close to the first frame 232 to prevent the pole piece strip from breaking or loosening.

[0040] In a specific embodiment, the unwinding mechanism 20 also includes an unwinding sealing assembly 28, and the unwinding sealing assembly 28 includes a first support plate 281, a first push plate 282 and a first push belt power member 283. The first support plate 281 is arranged on the side of the feeding chamber 11 close to the drying chamber 12, and the first push plate 282 is telescopically connected to the first support plate 281. The first push belt power member 283 is installed on the first support plate 281 to drive the first push plate 282 to approach or move away from the first support plate 281. Preferably, the first push belt power member 283 is a cylinder. In this embodiment, the number of the unwinding sealing assembly 28 is two groups, and the two groups of unwinding sealing assemblies 28 are symmetrically arranged about the through hole on the first partition. By cooperating with the two groups of unwinding sealing assemblies 28 to block the through hole on the first partition, the feeding chamber 11 and the drying chamber 12 can be kept sealed when a new electrode strip is replaced, and the vacuum loss in the drying chamber 12 is prevented, which is conducive to reducing energy consumption.

[0041] like Figure 3As shown, the drying mechanism 30 is built into the drying chamber 12 to heat and dry the electrode strip. The drying mechanism 30 includes a plurality of heating rollers 32 arranged at intervals, and the electrode strip is wound around each heating roller 32 in sequence; the number, diameter size and arrangement of the heating rollers 32 can be increased or decreased according to actual needs, and are not limited to the scheme shown in the drawings in this embodiment. Further, in order to adjust the winding direction of the electrode strip, the drying mechanism 30 also includes a third roller 31 and a fourth roller 33. The third roller 31 is arranged on the side of the drying chamber 12 close to the feed chamber 11, and the fourth roller 33 is arranged on the side of the drying chamber 12 close to the cooling chamber 13. Furthermore, the heating roller 32 is equipped with an electromagnetic induction heating element (not shown in the figure). The electromagnetic induction heating element is used to heat the heating roller 32 because the electromagnetic induction heating method has high heating efficiency and the heating temperature can be adjusted as needed. Preferably, the contact area between the pole piece strip and the surface of the heating roller 32 can be increased and the passage time of the pole piece strip around the heating roller 32 can be increased by increasing the diameter of the heating roller 32, so as to improve the efficiency of heating and drying.

[0042] Please see again Figure 3 , the cooling mechanism 40 is built into the cooling chamber 13 to cool the electrode strip after drying. The cooling mechanism 40 includes a plurality of cooling rollers 42 arranged at intervals, and the electrode strip is sequentially wound around each cooling roller 42; further, a flow channel (not shown) for the circulation of a refrigerant is provided inside the cooling roller 42, and the surface temperature of the cooling roller 42 can be reduced by introducing a refrigerant into the flow channel inside the cooling roller 42, and when the electrode strip contacts the surface of the cooling roller 42, the temperature of the electrode strip can be quickly reduced. In this embodiment, the number of cooling rollers 42 is two. Furthermore, the cooling mechanism 40 also includes a fifth roller 41 and a sixth roller 43, and the fifth roller 41 is arranged on the side of the cooling chamber 13 close to the drying chamber 12, and the sixth cooling chamber 13 is arranged on the side of the cooling chamber 13 close to the receiving chamber 14; the fifth roller 41 and the sixth roller 43 are used to adjust the direction of the electrode strip.

[0043] In a specific embodiment, the electrode strip drying device 100 further includes a winding mechanism 50, which is built into the receiving chamber 14 and is used to recycle the electrode strip that has been dried and cooled into a roll. The winding mechanism 50 includes a winding sealing assembly 51, a second deviation correction assembly 52, a seventh roller 53, a receiving tension adjustment assembly 54, an eighth roller 55 and a winding shaft 56. The winding sealing assembly 51 is arranged on the side of the receiving chamber 14 close to the cooling chamber 13. The structure of the winding sealing assembly 51 is the same as that of the unwinding sealing assembly 28, and the function is also the same; the winding sealing assembly 51 includes a second support plate, a second push plate and a second push belt power member. The second support plate is arranged on the side of the receiving chamber 14 close to the cooling chamber 13. The second push plate is telescopically connected to the second support plate. The second push belt power member is installed on the second support plate to drive the second push plate to approach or move away from the second support plate. Preferably, the second push belt power member is a cylinder. In this embodiment, there are two groups of winding sealing assemblies 51, and the two groups of winding sealing assemblies 51 are symmetrically arranged about the through holes on the third partition. By cooperating with the two groups of winding sealing assemblies 51, the through holes on the third partition can be blocked when replacing a new electrode strip to prevent the vacuum loss in the cooling chamber 13, which is beneficial to energy saving and environmental protection.

[0044] The second deviation correction component 52 is used to monitor and correct the pole piece strip. The structure of the second deviation correction component 52 is the same as that of the first deviation correction component 233, and the function is also the same. The second deviation correction component 52 includes a second machine base 521, a second frame 522 and a second deviation correction sensor 523. The second machine base 521 is arranged on the side of the cooling chamber 13 away from the sealing door, and the second frame 522 is slidably arranged on the second machine base 521. The second deviation correction sensor 523 is arranged on the side of the winding sealing component 51 away from the cooling chamber 13. The receiving tension adjustment component 54 is arranged on the side of the winding sealing component 51 away from the cooling chamber 13. The structure of the receiving tension adjustment component 54 is the same as that of the unwinding tension adjustment component 26, and the function is also the same, which will not be repeated below. The seventh roller 53 and the eighth roller 55 are respectively arranged on the opposite sides of the receiving tension adjustment component 54, and the winding shaft 56 is rotatably connected to the chassis 10, and the winding shaft 56 is installed on the second frame 522. Preferably, the unwinding shaft 21 and the winding shaft 56 are both air expansion shafts.

[0045] In a specific embodiment, a distance meter is provided next to the unwinding shaft 21 and the reeling shaft 56. The distance meter is used to monitor the diameter of the rolled electrode strip mounted on the unwinding shaft 21 and the reeling shaft 56, so that the operator can understand the reeling status of the electrode strip without opening the sealing door 16, so as to replace the new electrode strip in time.

[0046] When in use, the rolled electrode strip is manually pushed onto the unwinding shaft 21 in the feeding chamber 11, and the electrode strip is manually passed through the guide roller 22, the first deviation correction sensor 233, the pressure plate 242, the first roller 25, the first tension roller 263, the second roller 27 in sequence, and then enters the third roller 31, the heating roller 32, the fourth roller 33 in the drying chamber 12, and then enters the fifth roller 41, the cooling roller 42, the sixth roller 43 in the cooling chamber 13, and finally enters the winding sealing assembly 51, the second deviation correction assembly 52, the seventh roller 53, the material receiving tension adjustment assembly 54, the eighth roller 55, and the winding shaft 56 in the receiving chamber 14; after completion, close the sealing door 16, turn on the heating roller 32, turn on the vacuum, and after reaching the set temperature and vacuum value, turn on the cooling water circulation of the cooling roller 42, start the unwinding shaft 21 and the winding shaft 56, release, dry, cool and finally recycle the electrode strip into a roll.

[0047] The pole piece strip drying device 100 of the present invention performs a vacuum treatment inside the case 10, and utilizes the characteristic that the boiling point of water decreases under a vacuum environment (because the boiling point of water decreases significantly under negative pressure, the theoretical boiling point at -0.089Mpa is as low as 45°C, and the water can be evaporated at a relatively low temperature), and the water will quickly escape along the vacuum exhaust duct after vaporization, and will not re-condense inside the case 10 when the temperature decreases, thereby preventing the metal foil on the pole piece strip from being oxidized, and preventing the quality of the pole piece strip from being damaged by high-temperature drying, and at the same time allowing the microporous gaps of the pole piece strip to be released, so that in a vacuum environment, The electrode strip is dried under low temperature and then cooled to room temperature, which greatly saves drying time, improves drying efficiency, and enhances the quality of the electrode strip; the electrode strip is heated by arranging multiple heating rollers 32, and the electrode strip is sequentially wound around each heating roller 32, so that the continuous heating time is long, and the front and back sides of the electrode strip are heated alternately, which ensures that the electrode strip is heated evenly; similarly, by sequentially winding the electrode strip around each cooling roller 42, it can be ensured that the electrode strip is in full contact with the cooling roller 42, thereby accelerating the cooling; in addition, heat can only be transferred through contact in a vacuum environment, which is beneficial to reduce ineffective heat dissipation and reduce energy consumption.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A pole piece strip drying device, characterized in that: It includes a chassis and an unwinding mechanism, a drying mechanism, a cooling mechanism and a winding mechanism which are sequentially built into the chassis; The inside of the chassis is separated by a feeding chamber, a drying chamber, a cooling chamber and a receiving chamber, and the feeding chamber, the drying chamber, the cooling chamber and the receiving chamber are all connected to a vacuum exhaust pipe; The chassis is also provided with a sealing door, a first partition is provided between the feeding chamber and the drying chamber, a first through hole is provided on the first partition for the electrode strip to pass through, a second partition is provided between the drying chamber and the cooling chamber, a second through hole is also provided on the second partition for the electrode strip to pass through, a third partition is provided between the cooling chamber and the receiving chamber, a third through hole is provided on the third partition for the electrode strip to pass through; The interior of the chassis is provided with a plurality of support members; The unwinding mechanism is built into the feed chamber and is used to release the rolled pole piece strip; The drying mechanism is built into the drying chamber, and the drying mechanism includes a plurality of heating rollers arranged at intervals, and the electrode strip is sequentially wound around each of the heating rollers to heat and dry the electrode strip; The cooling mechanism is built into the cooling chamber, and the cooling mechanism includes a plurality of cooling rollers arranged at intervals, and the pole piece strip is sequentially wound around each of the cooling rollers to cool and dry the pole piece strip; The winding mechanism is built into the receiving chamber and is used to recycle the pole piece strip that has been dried and cooled into a roll; The unwinding mechanism includes an unwinding shaft, a guide roller and a tape assembly, wherein the unwinding shaft is connected to the chassis, the guide roller is arranged on one side of the unwinding shaft, the tape assembly is arranged on one side of the guide roller, and the tape assembly is used to connect the new and old pole piece strips; The unwinding mechanism also includes a first deviation correction component and a material unwinding tension adjustment component, the first deviation correction component includes a first machine base, a first frame and a first deviation correction sensor, the first machine base is arranged on one side of the chassis, the first frame is slidably arranged on the first machine base, the unwinding shaft and the guide roller are installed on the first frame, the first deviation correction sensor is arranged between the guide roller and the belt connecting component, the first deviation correction sensor is used to dynamically monitor whether the pole piece strip is offset during the unwinding process, and feed back the monitoring result to the frame moving power part on the first frame, and the frame moving power part dynamically fine-tunes the relative position of the first frame and the first machine base according to the monitoring result, the material unwinding tension adjustment component includes a first mounting plate, a first tension sensor and a first tension roller, one end of the first mounting plate is fixedly connected to the feed chamber, the first tension sensor is installed on the first mounting plate, and the first tension roller is installed on the side of the first tension sensor away from the first mounting plate; the material unwinding tension adjustment component monitors the tension of the pole piece strip through the first tension sensor, and dynamically adjusts the tension of the pole piece strip through the magnetic powder clutch connected to the end of the unwinding shaft close to the first frame; The unwinding mechanism also includes an unwinding sealing assembly, a first roller and a second roller, and the unwinding sealing assembly includes a first support plate, a first push plate and a first push-belt power member, the first support plate is arranged on a side of the feeding chamber close to the drying chamber, the first push plate is telescopically connected to the first support plate, and the first push-belt power member is installed on the first support plate to drive the first push plate to approach or move away from the first support plate. The number of the unwinding sealing assemblies is two groups, and the two groups of the unwinding sealing assemblies are symmetrically arranged about the first through hole on the first partition plate, the first roller is arranged between the belt connecting assembly and the unwinding tension adjustment assembly, and the second roller is arranged between the unwinding tension adjustment assembly and the unwinding sealing assembly; The heating roller has an electromagnetic induction heating element built in.

2. The electrode strip drying device according to claim 1, characterized in that: The belt connecting assembly includes a mounting box, a pressure plate and a belt connecting power piece. The mounting box is mounted at the bottom of the feed chamber. The pressure plate is telescopically connected to the mounting box. The belt connecting power piece is built into the mounting box. The belt connecting power piece is used to drive the pressure plate away from or close to the mounting box.

3. The electrode strip drying device according to claim 1, characterized in that: The drying mechanism further includes a third roller and a fourth roller. The third roller is arranged on a side of the drying chamber close to the feeding chamber, and the fourth roller is arranged on a side of the drying chamber close to the cooling chamber.

4. The electrode strip drying device according to claim 1, characterized in that: A flow channel for circulating a refrigerant is provided inside the cooling roller.

5. The electrode strip drying device according to claim 1, characterized in that: The cooling mechanism further includes a fifth roller and a sixth roller. The fifth roller is arranged on a side of the cooling chamber close to the drying chamber, and the sixth roller is arranged on a side of the cooling chamber close to the material receiving chamber.

6. The electrode strip drying device according to claim 1, characterized in that: The winding mechanism includes a winding sealing assembly, a second deviation correction assembly, a seventh roller, a material receiving tension adjustment assembly, an eighth roller and a winding shaft. The winding sealing assembly is arranged on a side of the material receiving chamber close to the cooling chamber. The second deviation correction assembly is used to monitor and correct the pole piece strip. The material receiving tension adjustment assembly is arranged on a side of the winding sealing assembly away from the cooling chamber. The seventh roller and the eighth roller are respectively arranged on opposite sides of the material receiving tension adjustment assembly, and the winding shaft is connected to the chassis.

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