CN219180544U

CN219180544U - Pole piece lithium supplementing equipment

Info

Publication number: CN219180544U
Application number: CN202223024227.9U
Authority: CN
Inventors: 金钊; 张�浩; 张传健
Original assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-06-13
Anticipated expiration: 2032-11-14

Abstract

The utility model belongs to the technical field of secondary batteries, and particularly relates to pole piece lithium supplementing equipment which comprises a conveying mechanism, an unreeling mechanism, a coating mechanism, a drying mechanism, a rolling mechanism and a reeling mechanism which are sequentially connected, wherein the conveying mechanism is used for sequentially conveying pole pieces released by the unreeling mechanism to the coating mechanism, the drying mechanism, the rolling mechanism and the reeling mechanism through a conveyor belt, the rolling mechanism comprises an upper cold press roller, a lower cold press roller, an upper feeding device and a lower feeding device, the upper cold press roller and the lower cold press roller are oppositely arranged, the upper cold press roller and the lower cold press roller are respectively positioned on the upper side and the lower side of the conveyor belt, the upper feeding device is used for coating protective slurry to the upper cold press roller, and the lower feeding device is used for coating the protective slurry to the lower cold press roller. The pole piece lithium supplementing equipment can realize the integrated operation of pole piece lithium supplementing coating, drying, rolling and rolling, and avoid the problem of sticking the roller and the problem of rolling safety.

Description

Pole piece lithium supplementing equipment

Technical Field

The utility model belongs to the technical field of secondary batteries, and particularly relates to pole piece lithium supplementing equipment.

Background

In recent years, the national policy encourages the development of new energy industries, the investment enthusiasm of the new energy industries by capital markets is huge, and the traditional automobile industries are transformed, so that the industry competition is aggravated, and the market can be occupied by the technical high points.

High energy density and long service life are main directions of future power battery development, and currently, the main development direction is the pre-lithiation technology. The pre-lithiation technique is classified into a positive electrode pre-lithiation technique and a negative electrode pre-lithiation technique. The positive electrode prelithiation usually uses dispersible lithium salt as a lithium supplementing additive, and the lithium salt is added into a positive electrode active material, so that the problems of low lithiation efficiency, more impurities, gas production of a battery cell and the like exist in the lithium salt decomposition process; the lithium powder, lithium-containing slurry, lithium tape and other lithium-containing substances are usually used as a prelithiation agent for prelithiation, and are combined with a negative electrode plate in an external force mode to achieve the aim of prelithiation; however, the existing negative electrode prelithiation has the disadvantages of relatively complex process and poor safety because the introduced lithium supplementing material has high activity and is easy to generate side reaction with air.

In order to ensure the safety in the lithium supplementing process, the metal lithium powder is generally suspended in an organic solvent to form a lithium-containing slurry lithium supplementing agent, and corresponding coating treatment is carried out at the same time. The first coating layer is a compact inorganic layer, and the second coating layer is an organic layer. The first coating layer contains Li ₂ O，Li ₂ CO ₃ LiOH, conductive carbon, CNT, and the like; the second coating layer comprises polytetrafluoroethylene, styrene-butadiene rubber, acrylic esters, sodium carboxymethyl cellulose, chitosan and the like. The pre-lithiation agent has reduced activity due to double-layer coating, can be coated under conventional air atmosphere and temperature and humidity conditions compared with lithium powder, and is compatibleOn the existing lithium ion production line, the equipment and environment modification cost is low. However, when the lithium-containing slurry subjected to the inertization treatment is applied to a pole piece and the solvent is dried and then subjected to a lithiation reaction with a negative electrode material, the reactivity is reduced due to the presence of a coating layer of an outer layer, so that the reactivity is enhanced in order to ensure metallic lithium. At present, the common crushing mode is a double-roller cold-pressing mode, but because the coating layer is made of high-molecular polymer, lithium powder is adhered to a transfer roller and a cold roller due to the cohesiveness of the polymer during rolling, and the cold-pressing efficiency and the production safety are affected. Meanwhile, after rolling, the exposed metal lithium is easy to oxidize in the air, and if the metal lithium is exposed in the air environment for a long time, the rolling has potential safety hazard.

Disclosure of Invention

The utility model aims at: aiming at the defects of the prior art, the pole piece lithium supplementing equipment can realize the integrated operation of pole piece lithium supplementing coating, drying, rolling and rolling, avoid the problem of sticking to the roller and the problem of rolling safety.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a pole piece moisturizing lithium equipment, includes unwinding mechanism, coating mechanism, stoving mechanism, roll-in mechanism, winding mechanism that sets gradually, unwinding mechanism is used for unreeling the pole piece of moisturizing lithium to be used for carrying out moisturizing lithium coating with the pole piece of waiting of unreeling mechanism, stoving mechanism is used for drying the pole piece after the coating mechanism coating, roll-in mechanism is used for carrying out the roll-in to the pole piece after the stoving mechanism handles, winding mechanism is used for carrying out the rolling to the pole piece after the roll-in mechanism handles, roll-in mechanism includes cold compression roller, lower cold compression roller, goes up loading attachment and unloader, go up cold compression roller and lower cold compression roller and set up relatively, go up cold compression roller and lower cold compression roller are located the upper and lower both sides of moisturizing lithium pole piece respectively, and upward loading attachment is used for coating protection thick liquids to last cold compression roller, and unloader is used for with protection thick liquids coating to lower cold compression roller.

Preferably, the rolling mechanism is further provided with a deviation correcting device, and the deviation correcting device is arranged between the upper cold pressing roller and the rolling mechanism.

Preferably, the winding mechanism comprises a shell, a winding roller and an inert gas device, wherein the winding roller is arranged in the shell and used for winding the pole piece processed by the rolling mechanism, the inert gas device is used for filling inert gas into the shell, the shell is provided with a feed inlet and an air inlet, the pole piece processed by the rolling mechanism enters the shell through the feed inlet and is wound at the winding roller, and the inert gas device is connected with the shell through the air inlet.

Preferably, the winding mechanism further comprises a guide roller, the guide roller is used for adjusting the angle of the pole piece entering the shell, the guide roller is arranged in the shell, and the guide roller is arranged between the feeding hole and the winding roller.

Preferably, the winding mechanism further comprises a tension roller arranged in the shell, the tension roller is used for adjusting the tightness degree of the pole piece, and the tension roller is arranged between the guide roller and the winding roller.

Preferably, the air inlet hole is provided with a control valve for controlling the air inlet or the air outlet, the shell is further provided with a gas monitor for monitoring the concentration and the pressure of the inert gas in the shell, and the gas monitor is electrically connected with the control valve.

Preferably, the length of the feeding hole is 1-8% greater than the width of the pole piece, and the height of the feeding hole is 1-5 cm.

Preferably, the shell is further provided with a sealing device, the sealing device comprises a driving device, a sealing cover plate, a monitoring device and a feeding pipeline, the feeding pipeline is arranged at the feeding inlet, the driving device is arranged at the outer side of the shell and used for driving the sealing cover plate to close or open the feeding pipeline according to signals of the monitoring device, the monitoring device is used for monitoring whether a pole piece passes through the feeding pipeline or not and conveying the signals to the driving device, the monitoring device comprises a light emitter and a light receiver, the light emitter and the light receiver are located at two ends of the feeding pipeline at the inner side of the shell, and the driving device is electrically connected with the light emitter and the light receiver.

Preferably, the feeding device comprises a first spray head, a first sponge roller, a first groove box and a first driving device, wherein the first spray head is used for spraying protective slurry on the surface of the first sponge roller, the first groove box is used for loading the first sponge roller, the first sponge roller is in abutting connection with the upper cold pressing roller, and the first driving device is used for driving the first sponge roller to rotate; the lower loading attachment includes second shower nozzle, second sponge roller, second groove box and second drive arrangement, and the second shower nozzle is used for spouting the protection thick liquids to the surface of second sponge roller, and the second groove box is used for loading second sponge roller, and second sponge roller is contradicted with lower chill roll and is connected, and second drive arrangement is used for driving second sponge roller rotation.

Preferably, the length of the drying mechanism is 5-25 m.

Compared with the prior art, the utility model has the beneficial effects that: the pole piece lithium supplementing equipment can realize the integrated operation of pole piece lithium supplementing coating, drying, rolling protective slurry and rolling, and avoid the problem of sticking to rollers and the problem of rolling safety.

Drawings

Fig. 1 is a schematic structural diagram of a pole piece lithium supplementing device of the present utility model.

Fig. 2 is a schematic view of the assembly of the sealing device of the present utility model with a housing.

Fig. 3 is a schematic structural view of the feeding device of the present utility model.

Fig. 4 is a schematic structural view of the lower loading device of the present utility model.

Wherein: p1, unreeling mechanism; 1. a coating mechanism; 11. an upper stirring and storing mechanism; 12. a lower stirring and storing mechanism; 13. an upper coating die head; 14. a lower coating die; 2. a drying mechanism; 3. a rolling mechanism; 31. feeding a cold press roller; 32. a lower cooling press roll; 33. a loading device; 331. a first nozzle; 332. a first sponge roller; 333. a first slot box; 334. a first driving device; 34. a discharging and feeding device; 341. a second nozzle; 342. a second sponge roller; 343. a second slot box; 344. a second driving device; 35. a deviation correcting device; 4. a winding mechanism; 41. a housing; 42. a wind-up roll; 43. an inert gas device; 44. a feed inlet; 45. a guide roller; 46. a tension roller; 47. a sealing device; 471. a driving cylinder; 472. sealing the cover plate; 473. a light emitter; 474. an optical receiver; 475. a feed conduit; 48. an air inlet hole.

Detailed Description

Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art is able to solve the technical problem within a certain error range, substantially achieving the technical effect.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The present utility model will be described in further detail below with reference to the drawings, but is not limited thereto.

As shown in fig. 1, a pole piece lithium supplementing device of this embodiment, including unwinding mechanism P1, coating mechanism 1, stoving mechanism 2, roll-in mechanism 3, winding mechanism 4 that set gradually, unwinding mechanism P1 is used for unreeling the lithium pole piece that will mend, coating mechanism 1 is used for carrying out the lithium coating of mending the lithium pole piece that will mend of unreeling mechanism P1, stoving mechanism 2 is used for drying the pole piece after coating mechanism 1, roll-in mechanism 3 is used for rolling the pole piece after the stoving mechanism 2 handles, winding mechanism 4 is used for rolling the pole piece after the roll-in mechanism 3 handles, roll-in mechanism 3 includes last cold-press roller 31, lower cold-press roller 32, last loading attachment 33 and lower loading attachment 34, last cold-press roller 31 and lower cold-press roller 32 are located the upper and lower both sides of mending the lithium pole piece respectively, go up loading attachment 33 is used for coating protection thick liquids to last cold-press roller 31, and lower loading attachment 34 is used for coating protection thick liquids to lower cold-press roller 32.

The pole piece lithium supplementing equipment of this embodiment can get into unreeling, lithium supplementing coating, stoving, roll-in protection thick liquids and rolling to the pole piece that needs the lithium supplementing in proper order, can accomplish the lithium supplementing process of pole piece completely, avoids the emergence of lithium supplementing in-process security problem, improves lithium supplementing quality and yield, carries out the roll-in of protection thick liquids after the stoving moreover, and protection thick liquids can enough avoid roll-in sticking roller problem, also can separate pole piece and air, avoids air to pole piece contact reaction, improves lithium supplementing quality. The method for the pole piece lithium supplementing equipment comprises the steps of directly spraying silicone oil, mineral oil, carbonic ester, sultone and the like on a roller, rolling under inert atmosphere after cold pressing, effectively solving the problem of sticking the roller, improving the safety problem after cold pressing and rolling, and having low cost and high working efficiency. The unreeling mechanism P1 unreels the pole piece, the pole piece is transferred to the coating mechanism 1 for coating and supplementing lithium, the pole piece is transferred to the drying mechanism 2 for drying, a lithium supplementing layer is formed on the surface of the pole piece, the pole piece is transferred to the rolling mechanism 3 for rolling, during rolling, the protective slurry is coated on the upper cold pressing roller 31 by the feeding device 33, the protective slurry is rolled on the surface of the pole piece by the upper cold pressing roller 31 to form a protective layer, the protective slurry is coated on the lower cold pressing roller 32 by the feeding device 34, the protective slurry is rolled on the surface of the pole piece by the lower cold pressing roller 32 to form a protective layer, and the lithium supplementing layer of the pole piece is fully covered, so that the protection is realized, the problem of rolling sticking is avoided, and finally the rolled pole piece is rolled. The upper cold-pressing roller 31 and the lower cold-pressing roller 32 are subjected to antistatic treatment, so that the adhesion of metal lithium can be further reduced to a certain extent, the adhesion of adhesives in slurry can be prevented, silicone oil, mineral oil, carbonate, sulfonate and the like are stored in the feeding device 33 and the discharging device 34, the heat dissipation of a pole piece can be enhanced, the flexibility of the pole piece can be improved, a valve is controlled in an extrusion device, and the transfer amount can be accurately confirmed and controlled by controlling the valve of an extrusion nozzle. Specifically, the coating mechanism 1 comprises an upper coating die head 13, a lower coating die head 14, an upper stirring and storing mechanism 11 and a lower stirring and storing mechanism 12, wherein the upper stirring and storing mechanism 11 is connected with the upper coating die head 13, the lower stirring and storing mechanism 12 is connected with the lower coating die head 14, the upper coating die head 13 and the lower coating die head 14 are oppositely arranged, the upper coating die head 13 and the lower coating die head 14 are respectively positioned on the upper side and the lower side of the conveyor belt, and the upper coating die head 13 and the lower coating die head 14 coat the two side surfaces of the pole piece.

The pole piece lithium supplementing equipment disclosed by the utility model can be compatible with the existing equipment such as coating, drying and cold rolling in the lithium battery industry. The coating mechanism 1 may be a transfer coater or an extrusion coater.

As an alternative embodiment, the rolling mechanism 3 is further provided with a deviation rectifying device 35, and the deviation rectifying device 35 is disposed between the upper cold pressing roller 31 and the winding mechanism 4. Correcting the deviation before the winding mechanism 4, avoiding the pole piece from inclining and shifting during winding, and improving the uniformity of winding.

As an alternative embodiment, in order to avoid that the exposed metallic lithium is easy to oxidize in air, the rolled pole piece is rolled up to an inert environment, the rolling mechanism 4 comprises a shell 41, a rolling roller 42 and an inert gas device 43, the rolling roller 42 is arranged in the shell 41, the rolling roller 42 is used for rolling the pole piece treated by the rolling mechanism 3, the inert gas device 43 is used for filling inert gas in the shell 41, the shell 41 is provided with a feed inlet 44 and an air inlet 48, the pole piece treated by the rolling mechanism 3 enters the shell 41 through the feed inlet 44 and is rolled up at the rolling roller 42, and the inert gas device 43 is connected with the shell 41 through the air inlet 48. The inert gas device 43 of the winding mechanism 4 of the embodiment is filled with inert gas to the shell 41 through the gas inlet, the inert gas can be neon, helium and the like, and the pole piece after lithium supplementing is rolled enters the shell 41 through the feed inlet 44, so that the contact reaction of the pole piece after lithium supplementing with external air is avoided, the quality of the pole piece is influenced, meanwhile, the pole piece after lithium supplementing is wound through the winding roller 42 under the environment of the inert gas, the lithium metal which is leaked after lithium supplementing is prevented from reacting with air during winding, the oxidation of the metal is reduced, and the lithium supplementing effect is improved. The housing 41 is a sealed environment with stable air and humidity, less heat release, no lithium metal powder, and high safety.

As an alternative embodiment, the winding mechanism 4 of the present embodiment further includes a guide roller 45, where the guide roller 45 is used to adjust the angle of the pole piece after entering the housing 41, the guide roller 45 is disposed in the housing 41, and the guide roller 45 is disposed between the feed inlet 44 and the winding roller 42. The angle of the pole piece entering the shell 41 can be adjusted by the guide roller 45, so that the pole piece accurately enters the winding mechanism 4, and the winding uniformity and quality are improved. Preferably, the bottom of the winding mechanism 4 is made into a round shape, so that the transportation is convenient.

As an alternative embodiment, the winding mechanism 4 of the present embodiment further includes a tension roller 46, where the tension roller 46 is used to adjust the tightness of the pole piece, and the tension roller 46 is disposed between the guide roller 45 and the winding roller 42. The pole piece needs to be tensioned when the winding mechanism 4 winds, wrinkles are avoided when winding is performed, and the tension roller 46 is used for adjusting the tightness of the pole piece so that the pole piece is wound with moderate tension. Preferably, the tension roller 46 can move in an arc shape, and the position can be dynamically adjusted according to the size of the winding, so as to release the stress of the wound pole piece and adjust the state of the wound pole piece.

As an alternative embodiment, the air inlet hole 48 is provided with a control valve for controlling the inlet or outlet of air, and the housing 41 is further provided with a gas monitor for monitoring the concentration and pressure of the inert gas in the housing 41, and the gas monitor is electrically connected to the control valve. When the gas monitor monitors that the gas in the shell 41 is too low, the control valve controls the gas to enter, and the inert gas device 43 feeds inert gas into the shell 41 through the gas inlet hole 48 so that the gas pressure in the shell 41 reaches a preset value. When the gas monitor monitors that the gas in the shell 41 is too high, the control valve controls the gas to be discharged, so that the gas in the shell 41 is discharged, and the gas pressure in the shell 41 is regulated.

As an alternative embodiment, the length of the feed port 44 of this embodiment is 1% -8% greater than the width of the pole piece, and the height of the feed port 44 is 1-5 cm. The feed opening 44 is slightly larger than the width of the pole piece so that the pole piece enters the housing 41 while leaving some room for adjustment of the pole piece. Preferably, the length of the feed opening 44 is 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8% greater than the width of the pole piece, and the height of the feed opening 44 is 1cm, 2cm, 3cm, 4cm, 5cm.

As shown in fig. 2, as an alternative embodiment, the housing 41 of the present embodiment is further provided with a sealing device 47, the sealing device 47 includes a driving cylinder 471, a sealing cover plate 472, a monitoring device and a feeding pipe 475, the feeding pipe 475 is disposed at the feeding port 44, the driving cylinder 471 is disposed at the outside of the housing 41, the driving cylinder 471 is used for driving the sealing cover plate 472 to close or open the feeding pipe 475 according to a signal of the monitoring device, the monitoring device is used for monitoring whether the feeding pipe 475 has a pole piece passing through and transmitting the signal to the driving cylinder 471, the monitoring device includes a light emitter 473 and a light receiver 474, the light emitter 473 and the light receiver 474 are disposed at two ends of the feeding pipe 475 at the inside of the housing 41, and the driving cylinder 471 is electrically connected with the light emitter 473 and the light receiver 474. The sealing device 47 can enable the shell 41 to form a relatively sealed and inert environment space after the winding is completed, so that the pole pieces for supplementing lithium are stored in the shell 41, and the quality of the pole pieces for supplementing lithium is ensured. The monitoring device is provided at the inner side of the housing 41, and is provided with a light emitter 473 and a light receiver 474, the light emitter 473 and the light receiver 474 being located at both ends of the feed pipe 475, respectively. When the pole piece enters the shell 41 through the feeding pipeline 475 in operation, the light signal emitted by the light emitter 473 is blocked by the pole piece, the light receiver 474 cannot reach the light receiver 474, the light receiver 474 transmits the signal to the driving cylinder 471, the driving cylinder 471 knows that the pole piece passes through the feeding pipeline 475, the driving cylinder 471 drives the sealing cover plate 472 to be far away from the feeding pipeline 475, and the feeding pipeline 475 is kept in an open state to allow the pole piece to enter. When no pole piece enters through the feeding pipeline 475, the light signal sent by the light emitter 473 is directly sent to the light receiver 474 and received by the light receiver 474, the light receiver 474 transmits the signal to the driving cylinder 471, and the driving cylinder 471 drives the sealing cover plate 472 to close the feeding pipeline 475 according to the signal, so that the shell 41 forms a sealing space, the pole piece after lithium supplementation is stored in a relatively sealed and inert environment in the shell 41, and the quality of the lithium supplementation pole piece is improved.

As an alternative embodiment, as shown in fig. 1 to 4, the loading device 33 includes a first spray head 331, a first sponge roller 332, a first tank box 333, and a first driving device 334, where the first spray head 331 sprays the protective slurry onto the surface of the first sponge roller 332, the first tank box 333 is used for loading the first sponge roller 332, the first sponge roller 332 is in abutting connection with the upper cold pressing roller 31, and the first driving device 334 is used for driving the first sponge roller 332 to rotate; the lower loading device 34 includes a second nozzle 341, a second sponge roller 342, a second tank box 343, and a second driving device 344, where the second nozzle 341 is used to spray the protective slurry onto the surface of the second sponge roller 342, the second tank box 343 is used to load the second sponge roller 342, the second sponge roller 342 is in abutting connection with the lower cold pressing roller 32, and the second driving device 344 is used to drive the second sponge roller 342 to rotate. The feeding device 33 and the discharging device 34 of the embodiment both adopt a sponge roller feeding mode, so that the protective slurry can be coated on the cold pressing roller more uniformly and thinly, an effective protective layer is formed, the using amount of the protective slurry is saved, and the thickness of the pole piece is not excessively influenced. During operation, the first driving device 334 drives the first sponge roller 332 to rotate, the first spray head 331 sprays the protective slurry onto the surface of the first sponge roller 332, and the protective slurry on the surface is coated onto the surface of the upper cold pressing roller 31 along with the rotation of the first sponge roller 332, so that the upper cold pressing roller 31 is provided with the protective slurry, and the protective layer can be formed on the surface of the pole piece by rolling. The first tank 333 is used for loading the first sponge roller 332, and meanwhile, the first tank 333 can hold the protective slurry around the first sponge roller 332 sprayed out by the first spray head 331, so as to avoid leakage of the protective slurry. Similarly, the second driving device 344 drives the second sponge roller 342 to rotate, the second nozzle 341 sprays the protective slurry onto the surface of the second sponge roller 342, and the protective slurry on the surface is coated onto the surface of the upper cold-pressing roller 31 along with the rotation of the second sponge roller 342, so that the upper cold-pressing roller 31 is provided with the protective slurry, and the protective layer can be formed on the surface of the pole piece by rolling. The second groove box 343 is used for loading the second sponge roller 342, and meanwhile, the second groove box 343 can hold the protective slurry around the second sponge roller 342 sprayed out by the second spray head 341, so as to avoid leakage of the protective slurry. Wherein the first driving device 334 and the second driving device 344 are motors.

As an alternative embodiment, the length of the drying mechanism 2 is 5-25 m. The pole piece passes through the drying mechanism 2 at a certain speed under the action of the conveying mechanism, and the drying mechanism 2 has a certain length, so that the pole piece is conveyed while being dried when passing through the drying mechanism 2. Preferably, the length of the drying mechanism 2 is 10cm, 15cm, 20cm, 25cm. The drying temperature is 50-90 ℃, and the low-oxygen equipment is easy to carry because the baking oven is short and has low temperature. The drying mechanism 2 includes a solvent recovery device. Preferably, the conveying mechanism has a tape running speed of 3-8 m/min, a drying temperature of about 80 ℃, a drying oven length of 6-15 m, and a suction fan and a solvent recovery system are arranged in the drying mechanism 2.

While the foregoing description illustrates and describes several preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims

1. The utility model provides a pole piece moisturizing equipment, its characterized in that, including unreeling mechanism (P1), coating mechanism (1), stoving mechanism (2), roll-in mechanism (3), winding mechanism (4) that set gradually, unreeling mechanism (P1) is used for carrying out the unreeling with waiting to mend the lithium pole piece, coating mechanism (1) is used for carrying out the moisturizing coating with the waiting to mend the lithium pole piece that unreeling mechanism (P1) unreels, stoving mechanism (2) are used for drying the pole piece after coating mechanism (1) coating, roll-in mechanism (3) are used for rolling the pole piece after handling stoving mechanism (2), winding mechanism (4) are used for rolling up the pole piece after handling roll-in mechanism (3), roll-in mechanism (3) are including last chill roll (31), lower chill roll (32), loading attachment (33) and unloader (34), go up chill roll (31) and lower chill roll (32) are located the last both sides respectively, and last cold roll (31) are used for carrying out the protection thick liquids (33) under to roll-in order to be used for coating protection thick liquids under to roll (32).

2. The pole piece lithium supplementing device according to claim 1, wherein the rolling mechanism (3) is further provided with a deviation correcting device (35), and the deviation correcting device (35) is arranged between the upper cold pressing roller (31) and the winding mechanism (4).

3. The pole piece lithium supplementing device according to claim 1, wherein the winding mechanism (4) comprises a shell (41), a winding roller (42) and an inert gas device (43), the winding roller (42) is arranged in the shell (41), the winding roller (42) is used for winding the pole piece processed by the rolling mechanism (3), the inert gas device (43) is used for filling inert gas in the shell (41), the shell (41) is provided with a feed inlet (44) and an air inlet hole, the pole piece processed by the rolling mechanism (3) enters the shell (41) through the feed inlet (44) and is wound at the winding roller (42), and the inert gas device (43) is connected with the shell (41) through the air inlet hole.

4. A pole piece lithium supplementing device according to claim 3, characterized in that the winding mechanism (4) further comprises a guide roller (45), the guide roller (45) is used for adjusting the angle of the pole piece entering the shell (41), the guide roller (45) is arranged in the shell (41), and the guide roller (45) is arranged between the feeding hole (44) and the winding roller (42).

5. The pole piece lithium supplementing device according to claim 4, wherein the winding mechanism (4) further comprises a tension roller (46) arranged in the shell (41), the tension roller (46) is used for adjusting the tightness degree of the pole piece, and the tension roller (46) is arranged between the guide roller (45) and the winding roller (42).

6. A pole piece lithium supplementing device according to claim 3, wherein the air inlet hole is provided with a control valve for controlling the air inlet or the air outlet, the housing (41) is further provided with a gas monitor for monitoring the inert gas concentration and the pressure in the housing (41), and the gas monitor is electrically connected with the control valve.

7. A pole piece lithium supplementing device according to claim 3, wherein the length of the feed inlet (44) is 1% -8% greater than the width of the pole piece, and the height of the feed inlet (44) is 1-5 cm.

8. A pole piece lithium supplementing device according to claim 3, wherein the housing (41) is further provided with a sealing device (47), the sealing device (47) comprises a driving device (471), a sealing cover plate (472), a monitoring device and a feeding pipeline (475), the feeding pipeline (475) is arranged at the feeding port (44), the driving device (471) is arranged at the outer side of the housing (41), the driving device (471) is used for driving the sealing cover plate (472) to close or open the feeding pipeline (475) according to a signal of the monitoring device, the monitoring device is used for monitoring whether the feeding pipeline (475) passes through and conveying the signal to the driving device (471), the monitoring device comprises a light emitter (473) and a light receiver (474), the light emitter (473) and the light receiver (474) are located at two ends of the feeding pipeline (475) at the inner side of the housing (41), and the driving device (471) is electrically connected with the light emitter (473) and the light receiver (474).

9. The pole piece lithium supplementing device according to claim 1, wherein the feeding device (33) comprises a first spray head (331), a first sponge roller (332), a first groove box (333) and a first driving device (334), the first spray head (331) is used for spraying protective slurry on the surface of the first sponge roller (332), the first groove box (333) is used for loading the first sponge roller (332), the first sponge roller (332) is in abutting connection with the upper cold pressing roller (31), and the first driving device (334) is used for driving the first sponge roller (332) to rotate; the lower loading attachment (34) include second shower nozzle (341), second sponge roller (342), second groove box (343) and second drive arrangement (344), and second shower nozzle (341) are used for spouting protection thick liquids to the surface of second sponge roller (342), and second groove box (343) are used for loading second sponge roller (342), and second sponge roller (342) are connected with lower chill roll (32) conflict, and second drive arrangement (344) are used for driving second sponge roller (342) rotation.

10. The pole piece lithium supplementing device according to claim 1, wherein the length of the drying mechanism (2) is 5-25 m.