CN211802155U

CN211802155U - Lithium ion battery coating oven device

Info

Publication number: CN211802155U
Application number: CN201922186189.9U
Authority: CN
Inventors: 张伟; 许少辉
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-10-30
Anticipated expiration: 2029-12-09

Abstract

The utility model provides a lithium ion battery coating oven device, belong to the lithium cell manufacture equipment field, including the bearing roller formula oven subassembly that connects gradually the setting, floated oven subassembly and foldable oven body, be equipped with the feed inlet on the bearing roller formula oven subassembly, one side of foldable oven body is equipped with the discharge gate, the lower extreme of discharge gate is equipped with the export deflector roll that supports and guide the mass flow pole piece, the inside of foldable oven body is equipped with a plurality of vertical and parallel arrangement' S heater, the lower part of every heater all is equipped with the guide roll, the regional upper end that adjacent heater formed also all is equipped with the guide roll, the mass flow pole piece forms the S-shaped after the guide roll of dislocation set from top to bottom in proper order and passes through export deflector roll transmission to next process. The utility model discloses both improve coating process efficiency and promote pole piece drying quality's purpose, promoted lithium ion battery's electrical property.

Description

Lithium ion battery coating oven device

Technical Field

The utility model belongs to lithium cell manufacture equipment field relates to lithium ion battery coating oven device.

Background

Lithium ion batteries have been widely used in the fields of digital communication equipment, electric tools, electric vehicles, etc. because of their advantages of long cycle life, safety, environmental protection, high energy density, etc. Coating is one of the key processes in the lithium battery manufacturing process, and is an extremely important link in the coating production process, and many abnormalities of the lithium ion battery are related to poor control of the process. The lithium ion battery coating equipment mainly comprises two core components: the coating head structure is closely related to the coating uniformity and the surface density, and the oven is related to the pole piece drying degree and the surface state.

The improvement of the coating efficiency and a plurality of surface defects are related to the setting of baking parameters and the insufficient length of an oven, the length of the oven of the conventional coating oven mechanism determines the coating and drying speed, and the coating speed has no space to be improved when the length of the oven is fixed; the length of an installation workshop determines the length of a coating oven and determines the space where the drying speed is not increased any more; when the coating speed is improved, the purposes of pole piece drying effect and drying quality cannot be guaranteed.

Therefore, a novel coating oven body mechanism capable of improving the coating speed and ensuring the drying effect of the pole pieces and the drying quality of the pole pieces is needed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved problem of the utility model is to provide a lithium ion battery coating oven device, not increasing installation factory building length, not increasing oven stoving length, not reducing pole piece stoving effect, also can promote coating drying efficiency when guaranteeing pole piece oven quality, reach the purpose that not only improves coating process efficiency but also promotes pole piece drying quality, promoted lithium ion battery's electrical property.

In order to solve the technical problem, the utility model discloses a technical scheme is: the lithium ion battery coating oven device comprises a roller type oven assembly, a suspension type oven assembly and a folding type oven body which are sequentially connected, wherein a feeding hole is formed in the roller type oven assembly, a discharging hole is formed in one side of the folding type oven body, and an outlet guide roller for supporting and guiding a current collector pole piece is arranged at the lower end of the discharging hole;

the foldable drying oven comprises a folding drying oven body and is characterized in that a plurality of vertical and parallel heaters are arranged in the folding drying oven body, a guide roller is arranged on the lower portion of each heater, a guide roller is arranged at the upper end of an area formed by adjacent heaters, and the current collector pole pieces sequentially pass through the guide rollers arranged in a vertically staggered mode to form an S-shaped trend and then are transmitted to the next procedure through an outlet guide roller.

Furthermore, the heights of the plurality of guide rollers at the upper end are consistent, the heights of the guide rollers at the lower end are consistent, and the upper end surfaces of the guide rollers and the upper end surface of the outlet guide roller are on the same horizontal line.

Furthermore, all the guide rollers at the upper end are fixed on the lifting frame, a driving rope is arranged in the middle of the lifting frame, and the other end of the driving rope is connected with an external driving mechanism to achieve telescopic action.

Further, the heater is hollow cylinder structure, the outer lane of heater all the equipartition has a plurality of air outlets at circumference and upper and lower position, the air outlet corresponds the setting with the surface of mass flow body pole piece.

Furthermore, realize through the connector between floated oven subassembly and the foldable oven body with the sealing connection of the two, be equipped with two middle rollers in the connector, one of them middle roller changes the material export with the centre of floated oven subassembly and corresponds the setting and tangent the setting with the lower terminal surface of the mass flow body pole piece, and another middle roller changes the material import with the centre on the floated oven subassembly and corresponds the setting and sets up with the lower terminal surface parallel and level of guide roller.

Furthermore, the feed inlet, the discharge outlet, the middle material transferring outlet and the middle material transferring inlet are sealed with the fixing device where the feed inlet, the discharge outlet, the middle material transferring outlet and the middle material transferring inlet are arranged to realize the internal and external isolation.

Further, the roller type oven assembly comprises two roller type oven bodies which are connected in sequence, each roller type oven body is internally provided with two material supporting guide rollers, two sides of each material supporting guide roller are arranged in a dispersed mode, the upper end of each roller type oven body is provided with two duckbilled air blowing nozzles, and the lower end of each roller type oven body is provided with one duckbilled air blowing nozzle.

Furthermore, the suspension type oven assembly comprises two suspension type oven bodies which are connected in sequence and have the same structure, and suspension air blowing nozzles which are arranged vertically and in a staggered mode are arranged inside each suspension type oven body.

Compared with the prior art, the utility model has the advantages and positive effect as follows.

1. The utility model discloses set up foldable oven body, through designing upper and lower two-layer guide roll, realized the setting of the great walking route of mass flow pole piece in the same space, set up the heater simultaneously and heat both sides, the mass flow passes in the structure of this application, can carry out high-efficient heating and drying to the mass flow pole piece for a long distance, has so both promoted the coating speed and can guarantee the stoving effect of pole piece, has promoted the efficiency of coating greatly;

2. the foldable oven body that sets up, but direct mount is at the back of floated oven body, reaches the effect that traditional oven increased 9 meters ovens only increasing 3 meters ovens, has played important effect to coating lifting efficiency, promotes the speed of coating greatly, has further promoted oven efficiency, and occupation space is littleer moreover.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a lithium ion battery coating oven device of the present invention;

fig. 2 is a schematic structural diagram of the lifting frame machine of the present invention for matching related parts.

Reference numerals:

1. a folding oven body; 2. a guide roller; 21. a lifting frame; 22. a drive rope; 23. a drive mechanism; 3. a heater; 31. an air outlet; 4. a current collector pole piece; 5. a discharge port; 6. a middle transfer inlet; 7. an outlet guide roller; 8. a feed inlet; 9. a roller type oven body I; 10. a roller type oven body II; 11. a suspension type oven body I; 12. a suspension type oven body II; 13. a material supporting guide roller; 14. a suspension blowing nozzle; 15. a duckbill air blowing nozzle; 16. a linker; 161. An intermediate roll; 162. and a middle transfer outlet.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

In the production of electrodes for lithium ion batteries, the corresponding electrode material is generally applied to a substrate in a liquid state. Then drying and transferring to the next processing procedure, after electrode coating, passing through an oven, drying and processing in the oven through hot air, because a large amount of solvent volatilizes, high-temperature high-concentration solvent steam is continuously generated in the oven, and waste gas needs to be discharged in time to balance air pressure and temperature, in the prior art, the oven is formed by connecting a plurality of oven bodies, the more the oven bodies are connected, the higher the oven efficiency is, the higher the speed is, but the longer the oven bodies are connected, the length of a workshop needs to be increased, energy consumption is increased, and the like, because the temperature of each section is different in the drying process, the amount of evaporated waste gas is also different, solvent steam is easy to gather due to too large evaporation amount, the local concentration and temperature are too high, and flammable gases such as NMP (NMP refers to N-methyl pyrrolidone, also called N-methyl-2-pyrrolidone) are easy to explode, but do not change the body and promote coating speed and will cause the pole piece to dry, unfavorable condition such as chap, promote preceding temperature wind speed and will cause preceding volatile volume big, concentration is too high, produces the potential safety hazard to volatilize too fast and produce the binder come-up and influence the battery performance, consequently need design one kind and neither increase body length and also can promote coating speed, reach the novel mechanism of stoving effect.

The current collector, as the name implies, refers to a structure or a part for collecting current, and in a lithium ion battery, mainly refers to a metal foil, such as a copper foil or an aluminum foil, and generally also refers to a tab, which mainly functions to collect current generated by active materials of the battery so as to form a larger current for external output, so that the current collector should be in full contact with the active materials, and the internal resistance should be as small as possible.

As shown in fig. 1 and 2, the lithium ion battery coating oven device comprises a roller type oven assembly, a suspension type oven assembly and a folding type oven body 1 which are sequentially connected, wherein a feed port 8 is formed in the roller type oven assembly, a discharge port 5 is formed in one side of the folding type oven body 1, and an outlet guide roller 7 for supporting and guiding a current collector pole piece 4 is arranged at the lower end of the discharge port 5;

the foldable drying oven comprises a folding drying oven body 1, wherein a plurality of vertical and parallel heaters 3 are arranged in the folding drying oven body 1, a guide roller 2 is arranged at the lower part of each heater 3, the upper end of an area formed by the adjacent heaters 3 is also provided with the guide roller 2, and a current collector pole piece 4 sequentially passes through the guide rollers 2 which are arranged in a vertically staggered mode to form an S-shaped trend and then is transmitted to the next procedure through an outlet guide roller 7.

Preferably, the heights of the guide rollers 2 at the upper end are consistent, the heights of the guide rollers 2 at the lower end are consistent, the upper end surfaces of the guide rollers 2 and the upper end surface of the outlet guide roller 7 are on the same horizontal line, so that the derivation and the derivation of the current collector pole piece 4 are facilitated, the stress balance of the current collector pole piece in the transmission process is ensured, the problem of wrinkles or overlarge tension is not easy to generate, and the quality qualified rate of products is improved.

Preferably, all the guide rollers 2 at the upper end are fixed on the lifting frame 21, the guide rollers 2 are rotatably connected with the lifting frame 21 through a bearing structure, a driving rope 22 is arranged in the middle of the lifting frame 21, the other end of the driving rope 22 is connected with an external driving mechanism 23 to realize the telescopic action of the driving rope, a fixed pulley is arranged at the upper end of the folding oven body 1, a fixed pulley for guiding the driving rope 22 is also arranged at the external part, the driving wheel is connected with the driving mechanism 23 after being guided by the fixed pulley, the driving mechanism 23 can be a cylinder, an oil cylinder, an electric push rod or a motor lead screw mechanism, or a small-sized winch structure, the tail end of the driving rope 22 can be lifted through the telescopic action of the cylinder, the tail end of the driving rope 22 can be lifted through the movement of the winch, as long as the tail end of the driving rope 22 can be, be equipped with the line rail of guaranteeing the lift precision between crane 21 and foldable oven body 1's inner wall, realize the lift back of guide roller 2, the walking route of mass flow body pole piece 4 can change and adjust, satisfies the different drying time's of different materials demand, promotes the application range of this structure, promotes the commonality, the utilization ratio of lifting means.

Preferably, the heater 3 is a hollow cylinder structure, a structure for heating and blowing is conveniently built in, a plurality of air outlets 31 are uniformly distributed on the outer ring of the heater 3 in the circumferential direction and the upper and lower positions, the air outlets 31 are correspondingly arranged on the surface of the current collector pole piece 4 to realize the flow of hot air, the heater 3 mainly functions to realize the flow of hot air and accelerate the evaporation and drying of the current collector pole piece 4, the heater 3 can be composed of an explosion-proof fan, a reducing upper air inlet channel, a heating box and a connecting air channel, a ceramic heating body is built in, the safety of the explosion-proof fan is improved, the explosion factor is reduced, the reducing type air inlet is adopted, the caliber is gradually reduced from air inlet to air outlet, the blowing heat flow blowing force is larger by utilizing the principle of fluidics, the evaporation and drying effects are better, the efficiency is higher, the heating box ensures that heat is kept in the gas flow circulation process, and ensures, the air channel ensures the circulation of air flow, and the hot air drying is carried out by adopting multiple points and long distance, so that the drying efficiency in unit area is improved; more preferably, the heater 3 can be controlled by a frequency converter, and different air flow speeds and heating temperatures are set according to different materials, so that the rapid adjustment and control under different conditions are met, and the application range of the structure is widened.

Preferably, the suspension oven assembly and the folding oven body 1 are hermetically connected through a connector, the sealing structure can be realized by adopting a sealing structure in the existing structure, and can be sealed by adopting a sealing strip type, the existing structure can be adopted, the adjacent suspension oven bodies are hermetically connected, two intermediate rollers 161 are arranged in the connector 16, one intermediate roller 161 is arranged corresponding to a middle material transferring outlet 162 of the suspension oven assembly and is tangent to the lower end surface of the current collector pole piece 4, the other intermediate roller 161 is arranged corresponding to a middle material transferring inlet 6 on the suspension oven assembly and is parallel and level to the lower end surface of the guide roller 2, the arrangement of the two intermediate rollers 161 realizes the direction change of the current collector pole piece 4, the direction change is changed from the upper part to the lower part, the arrangement and layout of the interior of the folding oven body 1 are facilitated, and the structure is more compact, the occupied space is smaller.

Preferably, feed inlet 8, discharge gate 5, the material export 162 is changeed in the middle and the material import 6 is changeed in the middle all realizes inside and outside isolation with the sealed setting of the fixing device at place, prevent that outside humid air or impurity etc. from getting into, influence the quality of coating, except the business turn over of mass flow body pole piece 4, other positions are all sealed to be set up, adopt the sand control curtain can, to the structure in this application, preferential silica gel material etc. can not cause the damage to the surface of mass flow body pole piece 4, the qualification rate of product has also been guaranteed to a certain extent.

Preferably, the roller type oven assembly comprises a roller type oven body I9 and a roller type oven body II 10 which are connected in sequence, two material supporting guide rollers 13 are arranged in each roller type oven body, two sides of each roller type oven body are arranged in a dispersing mode, two duckbilled air blowing nozzles 15 are arranged at the upper end of each roller type oven body, one duckbilled air blowing nozzle 15 is arranged at the lower end of each roller type oven body, the whole structure is guided to apply force in a balanced mode, the duckbilled air blowing nozzles 15 are adopted, wind power is concentrated, and the effect of primary preheating is achieved better.

Preferably, the suspension type oven subassembly is including connecting gradually two suspension type oven bodies I11 and II 12 that the structure is the same of suspension type oven body, and the inside of every suspension type oven body all is equipped with about and the suspension blowing mouth 14 of dislocation set, on the basis of preheating for the first time, increases the area of blowing at every turn, realizes holistic second time and preheats for holistic temperature is balanced more stable, avoids chapping, promotes the quality and the qualification rate of product.

In the actual use process, a roller type oven body I9, a roller type oven body II 10, a suspension type oven body I11, a suspension type oven body II 12 and a folding type oven body 1 are sequentially connected, a current collector pole piece 4 is supported and guided by a material supporting guide roller 13 after entering from a feeding hole 8 and is conveyed forwards, in the conveying process, duckbill air blowing nozzles 15 arranged at the upper end and the lower end of the current collector pole piece 4 blow the current collector pole piece 4, the current collector pole piece 4 is preheated at the same time, the current collector pole piece 4 is preheated for the first time after being discharged from the roller type oven body II, then the current collector pole piece 4 sequentially enters the suspension type oven body I and the suspension type oven body II, the upper surface and the lower surface of the current collector pole piece 4 are dried and evaporated through suspension air blowing nozzles 14 arranged in a staggered mode from top to bottom, and secondary preheating of the current collector pole piece 4, the mass flow pole piece 4 after complete drying enters into foldable oven body 1 through connector 16 and carries out high-efficient stoving to mass flow pole piece 4, the mass flow pole piece accomplishes foldingly passing through the guide of a plurality of guide rolls 2 that set up from top to bottom in foldable oven body 1, and set up heater 3 in the both sides of the vertical direction of mass flow pole piece 4, guarantee can long distance, carry out high-efficient heating stoving to mass flow pole piece 4 for a long time, it remains to get rid of the solvent in the pole piece, the stoving effect of pole piece has both been promoted coating speed and also can have been guaranteed like this, the efficiency of coating has been promoted greatly, guarantee pole piece stoving effect, lithium ion battery's electrical property has been promoted.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. Lithium ion battery coating oven device, its characterized in that: the device comprises a roller type oven assembly, a suspension type oven assembly and a folding type oven body which are sequentially connected, wherein a feed port is formed in the roller type oven assembly, a discharge port is formed in one side of the folding type oven body, and an outlet guide roller for supporting and guiding a current collector pole piece is arranged at the lower end of the discharge port;

2. The lithium ion battery coating oven device of claim 1, characterized in that: the heights of the plurality of guide rollers at the upper end are consistent, the heights of the guide rollers at the lower end are consistent, and the upper end surfaces of the guide rollers and the upper end surface of the outlet guide roller are on the same horizontal line.

3. The lithium ion battery coating oven device of claim 2, characterized in that: all the guide rollers at the upper end are fixed on the lifting frame, the middle part of the lifting frame is provided with a driving rope, and the other end of the driving rope is connected with an external driving mechanism to realize the telescopic action of the driving rope.

4. The lithium ion battery coating oven device of claim 1, characterized in that: the heater is hollow cylinder structure, the outer lane of heater all the equipartition has a plurality of air outlets at circumference and upper and lower position, the air outlet corresponds the setting with the surface of mass flow body pole piece.

5. The lithium ion battery coating oven device of claim 1, characterized in that: the suspension type drying oven comprises a suspension type drying oven body and is characterized in that the suspension type drying oven body and the folding type drying oven body are connected in a sealing mode through a connector, two middle rollers are arranged in the connector, one middle roller corresponds to a middle material rotating outlet of the suspension type drying oven body and is tangent to the lower end face of a current collector pole piece, and the other middle roller corresponds to a middle material rotating inlet of the suspension type drying oven body and is parallel and level to the lower end face of a guide roller.

6. The lithium ion battery coating oven device of claim 5, characterized in that: the feed inlet, the discharge outlet, the middle material transferring outlet and the middle material transferring inlet are sealed with the fixing device where the feed inlet and the discharge outlet are located to realize the internal and external isolation.

7. The lithium ion battery coating oven device of claim 1, characterized in that: the roller type oven assembly comprises two roller type oven bodies which are connected in sequence, wherein two material supporting guide rollers are arranged in each roller type oven body, two sides of each roller type oven body are arranged in a dispersed mode, two duckbilled air blowing nozzles are arranged at the upper end of each roller type oven body, and one duckbilled air blowing nozzle is arranged at the lower end of each roller type oven body.

8. The lithium ion battery coating oven device of claim 1, characterized in that: the suspension type oven assembly comprises two suspension type oven bodies which are connected in sequence and have the same structure, and suspension air blowing nozzles which are arranged vertically and in a staggered mode are arranged inside each suspension type oven body.