CN220991629U - Drying oven for preventing pole piece from cracking - Google Patents

Abstract

The utility model relates to an oven for preventing pole pieces from cracking during drying, and relates to the technical field of pole piece drying, which comprises a box body, wherein one end of the box body is provided with an inlet, the other end of the box body is provided with an outlet, a plurality of conveying rollers are arranged in the box body, a plurality of main drying pipes are arranged in the box body, the main drying pipes are arranged in parallel with the conveying rollers, a plurality of main air outlet holes are formed in the main drying pipes, a group of auxiliary drying pipes are arranged in the box body, the auxiliary drying pipes are arranged perpendicular to the conveying rollers, a plurality of auxiliary air outlet holes are formed in the auxiliary drying pipes, one auxiliary drying pipe is positioned at one end of the main drying pipe, and the other auxiliary drying pipe is positioned at the other end of the main drying pipe. The utility model has the effects of uniformly drying the pole piece and reducing the cracking of the pole piece.

Description

Drying oven for preventing pole piece from cracking

Technical Field

The utility model relates to the technical field of pole piece drying, in particular to an oven for pole piece cracking prevention.

Background

In the lithium battery industry, the upper and lower surfaces of the foil are coated with wet slurry to form a coated pole piece, and the wet coated pole piece is required to be dried by an oven to form a dried coated pole piece.

The Chinese patent with the authorized bulletin number of CN217450836U in the related art provides a lithium battery pole piece drying treatment device, which comprises a drying box, wherein an inlet is arranged at one end of the drying box, an outlet is arranged at the other end of the drying box, a plurality of conveying rollers are arranged in the drying box in a rotating manner, a plurality of drying pipes are arranged in the drying box, a plurality of air outlet holes are formed in the drying pipes, and an air supply mechanism is arranged on the drying box and used for inputting hot air into the drying pipes. The pole piece is input into the drying box through the inlet, the pole piece in the drying box is output through the outlet under the action of the conveying roller, and in the moving process of the pole piece in the drying box, hot gas is input into the drying pipe through the air supply assembly, the hot gas in the drying pipe flows to the pole piece through the air outlet, and then the hot gas carries out drying treatment on the pole piece.

In carrying out the present application, the inventors have found that at least the following problems exist in this technology: in the pole piece drying process, the slurry weight at the edge position of the pole piece is smaller than that at the middle position of the pole piece, the edge position of the pole piece can be dried before the middle position of the pole piece, and after the middle position of the pole piece is dried, the edge position of the pole piece is easy to crack.

Disclosure of utility model

In order to uniformly dry the pole piece and reduce the cracking of the pole piece, the application provides an oven for preventing the pole piece from cracking.

The application provides an oven for preventing pole pieces from cracking, which adopts the following technical scheme:

the utility model provides a pole piece is prevented drying and is split with oven, includes the box, the import is seted up to box one end, the export is seted up to the box other end, set up a plurality of transfer rollers in the box, set up a plurality of main drying pipes in the box, main drying pipe and transfer roller parallel arrangement, set up a plurality of main ventholes on the main drying pipe, set up a set of auxiliary drying pipe in the box, auxiliary drying pipe sets up with the transfer roller is perpendicular, set up a plurality of auxiliary ventholes on the auxiliary drying pipe, one of them auxiliary drying pipe is located main drying pipe one end, another auxiliary drying pipe is located main drying pipe other end.

Through adopting above-mentioned technical scheme, the pole piece is by import input stoving incasement, the pole piece in the stoving incasement is exported by the export under the effect of transfer roller, the pole piece is in the stoving incasement remove the in-process, let in primary stoving hot-gas in the main stoving pipe, primary stoving hot-gas in the main stoving pipe blows to pole piece intermediate position through the main venthole, and then the main stoving pipe is dried pole piece intermediate position, let in secondary stoving hot-gas in the auxiliary stoving pipe, secondary stoving hot-gas in the auxiliary stoving pipe blows to pole piece edge position through the auxiliary venthole, and then the auxiliary stoving pipe is dried pole piece edge position, because primary stoving hot-gas is higher and humidity is lower than secondary stoving hot-gas temperature, and then in the pole piece stoving in-process, make pole piece edge position and pole piece intermediate position stoving degree even, the circumstances that the pole piece edge position can be dried earlier than the pole piece intermediate position, and then reduce the circumstances that the pole piece takes place the fracture, the effect that makes the pole piece carry out even drying.

Preferably, the main drying pipes are all communicated with each other to form a main air inlet pipe, one end of each main air inlet pipe, far away from the main drying pipe, penetrates through the box body, the main air inlet pipes are arranged at one end outside the box body together to form a main air supply pipe, and the main air supply pipe is communicated with an air supply blower.

Through adopting above-mentioned technical scheme, be connected air supply blower air inlet and dry hot gas air supply, start the air supply air-blower, the air supply air-blower blows dry hot gas into main air supply pipe, and the dry hot gas of main air supply pipe to main drying intraductal lets in is once stoving hot gas, and then reaches the effect that once stoving hot gas let in the box by main drying pipe.

Preferably, the main air inlet pipe is provided with a main air inlet check valve.

By adopting the technical scheme, the air flow in the main drying pipe is adjusted by adjusting the opening of the main air inlet check valve, and then the input quantity of primary drying hot air is adjusted according to the dryness degree of the middle position of the pole piece.

Preferably, an air return cover is arranged between the main drying pipes, the top of the air return cover is communicated with an air return pipe, one end of the air return pipe, far away from the air return cover, penetrates through the box body, the air return pipes are arranged at one end outside the box body in a communicated mode, a flow distribution assembly is arranged on the air return box, and the flow distribution assembly is used for inputting a part of gas in the air return box into the auxiliary drying pipes.

Through adopting above-mentioned technical scheme, the return air cover is inhaled the gas in the box and is returned the bellows through the return air pipe, the return air box is through the gas that the reposition of redundant personnel subassembly lets in to vice stoving intraductal, and then reaches the effect that the stoving of secondary is hot gas lets in the box by vice stoving pipe, because the gas in the box carries the gas of vapor after the inside gas of box carries out the heat exchange, and then the temperature of the stoving of secondary is hot gas can be less than the temperature of the stoving of primary hot gas, and the humidity of the stoving of secondary hot gas can be higher than the humidity of the stoving of primary hot gas.

Preferably, the split-flow assembly comprises a split-flow air pump and a split-flow three-way pipe, wherein the input end of the split-flow air pump is communicated with the return air box, the output end of the split-flow air pump is communicated with the inlet of the split-flow three-way pipe, one outlet of the split-flow three-way pipe is communicated with an exhaust pipe, the other outlet of the split-flow three-way pipe is communicated with an auxiliary air supply pipe, and one end of the auxiliary air supply pipe, far away from the split-flow three-way pipe, is communicated with the auxiliary drying pipe.

Through adopting above-mentioned technical scheme, reposition of redundant personnel air pump starts, and reposition of redundant personnel air pump makes the return air cover inhale the return air case with the gas in the box through the return air pipe to reposition of redundant personnel air pump draws in the return air case and shunts the three-way pipe, and some gas gets into and forms secondary stoving hot gas in the vice air supply pipe, and another part gas carries out abandonment treatment process through the blast pipe.

Preferably, the auxiliary drying pipe is communicated with an auxiliary air inlet pipe, an auxiliary air inlet one-way valve is arranged on the auxiliary air inlet pipe, and one end of the auxiliary air inlet pipe, which is far away from the auxiliary drying pipe, is communicated with the auxiliary air supply pipe.

Through adopting above-mentioned technical scheme, in the vice stoving pipe of gas input through vice intake pipe in the vice air supply pipe, through adjusting vice air inlet check valve aperture, adjust the gas flow who gets into in the vice stoving pipe, and then according to pole piece edge stoving degree adjustment secondary stoving hot gas's input.

Preferably, the auxiliary air inlet pipe is communicated with a diffusing pipe, a diffusing one-way valve is arranged on the diffusing pipe, and one end, far away from the auxiliary air inlet pipe, of the diffusing pipe is communicated with the exhaust pipe.

By adopting the technical scheme, the opening of the diffusing one-way valve is adjusted according to the air pressure in the auxiliary air supply pipe, so that the air pressure in the auxiliary air supply pipe tends to be stable.

Preferably, an exhaust one-way valve is arranged on the exhaust pipe, and the exhaust one-way valve is arranged between the diffusing pipe and the split three-way pipe.

Through adopting above-mentioned technical scheme, the exhaust check valve makes the gaseous flow direction in the blast pipe only can be by reposition of redundant personnel three-way pipe to exhaust treatment device remove, reduces the condition that gaseous refluence to the return air incasement.

In summary, the present application includes at least one of the following beneficial technical effects:

1. The box body, the inlet, the outlet, the conveying roller, the main drying pipe, the main air outlet, the auxiliary drying pipe and the auxiliary air outlet are arranged, so that the drying degree of the edge position of the pole piece and the middle position of the pole piece is uniform, the situation that the edge position of the pole piece is dried before the middle position of the pole piece is reduced, the situation that the pole piece is cracked is further reduced, and the effect of uniformly drying the pole piece is achieved;

2. the main drying pipe is used for introducing primary drying hot gas into the box body through the main air supply pipe and the air supply blower;

3. through setting up return air cover, return air pipe, return air box and reposition of redundant personnel subassembly, let in the secondary stoving hot gas to the box by vice stoving pipe.

Drawings

Fig. 1 is a schematic structural diagram of an oven for preventing pole pieces from cracking by baking in an embodiment of the application.

Fig. 2 is a cross-sectional view of an oven for preventing drying and cracking of pole pieces in an embodiment of the application.

Fig. 3 is an enlarged view of a portion a in fig. 2.

FIG. 4 is a cross-sectional view showing the connection relationship of the auxiliary drying duct and the auxiliary feeding duct in the embodiment of the present application.

Fig. 5 is an enlarged view of a portion B in fig. 4.

Reference numerals illustrate: 1. a case; 11. an inlet; 12. an outlet; 13. a conveying roller; 2. a main drying pipe; 21. a main air outlet hole; 3. an auxiliary drying tube; 31. an auxiliary air outlet hole; 4. a main air inlet pipe; 41. a main air inlet check valve; 42. a main feeding pipe; 43. a gas supply blower; 5. a return air box; 51. an air return pipe; 52. an air return cover; 6. a shunt assembly; 61. a split air pump; 62. a split three-way pipe; 7. an auxiliary air inlet pipe; 71. a secondary air intake check valve; 72. a subsidiary air supply pipe; 8. a diffusing pipe; 81. a bleeding one-way valve; 9. an exhaust pipe; 91. an exhaust check valve.

Detailed Description

The application is described in further detail below with reference to fig. 1-5.

The embodiment of the application discloses an oven for preventing a pole piece from cracking. Referring to fig. 1 to 5, it includes a case 1, an inlet 11 is formed at one end of the case 1, an outlet 12 is formed at the other end of the case 1, and a plurality of transfer rollers 13 are installed in the case 1 in a width direction. A plurality of main drying pipes 2 are arranged in the box body 1 along the width direction, the main drying pipes 2 are parallel to the conveying rollers 13, and a plurality of main air outlet holes 21 are formed in the main drying pipes 2. A group of auxiliary drying pipes 3 are arranged in the box body 1 along the length direction, the auxiliary drying pipes 3 are mutually perpendicular to the conveying rollers 13, and a plurality of auxiliary air outlet holes 31 are formed in the auxiliary drying pipes 3. One pair of drying pipes 3 is positioned at one end of the main drying pipe 2, and the other pair of drying pipes 3 is positioned at the other end of the main drying pipe 2. The pole piece is input into the drying box through the inlet 11, and the pole piece in the drying box is output through the outlet 12 under the action of the conveying roller 13. In the process of moving the pole piece in the drying box, primary drying hot gas is introduced into the main drying pipe 2, and the primary drying hot gas in the main drying pipe 2 is blown to the middle position of the pole piece through the main air outlet hole 21, so that the middle position of the pole piece is dried by the main drying pipe 2; the secondary drying hot gas is introduced into the secondary drying pipe 3, and the secondary drying hot gas in the secondary drying pipe 3 is blown to the edge position of the pole piece through the secondary air outlet hole 31, so that the secondary drying pipe 3 dries the edge position of the pole piece. Because primary drying hot gas is higher in temperature and lower in humidity than secondary drying hot gas, and then in the pole piece stoving process, make pole piece edge position and pole piece intermediate position stoving degree even, reduce pole piece edge position and can be earlier than the dry condition of pole piece intermediate position, and then reduce the pole piece and take place the condition of fracture, reach the effect that makes the pole piece carry out even drying.

In order to introduce primary drying hot gas into the box 1, referring to fig. 2 to 5, both ends of the main drying pipe 2 are respectively provided with a main air inlet pipe 4 in a communicating manner, and the main air inlet pipe 4 is provided with a main air inlet check valve 41. One end of the main air inlet pipe 4, which is far away from the main drying pipe 2, penetrates through the box body 1, the main air inlet pipe 4 is positioned at one end outside the box body 1 and is jointly communicated with the main air supply pipe 42, the main air supply pipe 42 is communicated with an air supply blower 43, and an air inlet of the air supply blower is connected with a dry hot air source. The air supply blower 43 is started, and the air supply blower 43 blows dry hot air into the main air supply pipe 42, and the dry hot air introduced into the main drying pipe 2 by the main air supply pipe 42 is primary dry hot air. According to the dryness of the middle position of the pole piece, the opening of the main air inlet check valve 41 is adjusted, and then the air flow in the main drying pipe 2 is adjusted, so that the effect of adjusting the input quantity of primary drying hot air is achieved.

In order to introduce secondary drying hot gas into the box body 1, referring to fig. 2 to 5, an air return cover 52 is installed between adjacent main drying pipes 2, the top parts of the air return covers 52 are all communicated with an air return pipe 51, and one end, far away from the air return cover 52, of the air return pipe 51 penetrates through the box body 1. The return air pipe 51 is arranged at one end outside the box body 1 and is communicated with the return air box 5, the return air box 5 is provided with the split-flow component 6, and the split-flow component 6 is used for inputting a part of gas in the return air box 5 into the auxiliary drying pipe 3. The diverting assembly 6 comprises a diverting air pump 61 and a diverting three-way pipe 62, wherein the input end of the diverting air pump 61 is communicated with the return air box 5, and the output end of the diverting air pump 61 is communicated with the inlet of the diverting three-way pipe 62. One outlet of the split three-way pipe 62 is communicated with an exhaust pipe 9, the other outlet of the split three-way pipe 62 is communicated with an auxiliary air supply pipe 72, and one end, far away from the split three-way pipe 62, of the auxiliary air supply pipe 72 is communicated with the auxiliary drying pipe 3. The split air pump 61 is started, the split air pump 61 enables the return air cover 52 to suck the air in the box body 1 into the return air box 5 through the return air pipe 51, and the split air pump 61 pumps the air in the return air box 5 into the split three-way pipe 62. The split three-way pipe 62 allows a part of the gas to enter the subsidiary gas supply pipe 72 to form secondary drying hot air, and the other part of the gas passes through the gas exhaust pipe 9 to be subjected to a disposal process. Because the gas in the air return box 5 is the gas carrying water vapor after heat exchange of the gas in the box body 1, the temperature of the secondary drying hot gas is lower than that of the primary drying hot gas, and the humidity of the secondary drying hot gas is higher than that of the primary drying hot gas.

In order to adjust the input amount of the secondary drying hot gas according to the drying degree of the edge of the pole piece, referring to fig. 4 and 5, an auxiliary air inlet pipe 7 is installed on the auxiliary drying pipe 3, one end of the auxiliary air inlet pipe 7 is communicated with the auxiliary drying pipe 3, the other end of the auxiliary air inlet pipe 7 penetrates through the box body 1 and is communicated with the auxiliary air supply pipe 72, an auxiliary air inlet check valve 71 is installed on the auxiliary air inlet pipe 7, a diffusing pipe 8 is installed between the auxiliary air inlet pipe 7 and the exhaust pipe 9, one end of the diffusing pipe 8 is located between the auxiliary air inlet check valve 71 and the auxiliary drying pipe 3 and is communicated with the auxiliary air inlet pipe 7, the other end of the diffusing pipe 8 is communicated with the exhaust pipe 9, and a diffusing check valve 81 is installed on the diffusing pipe 8. The exhaust pipe 9 is provided with an exhaust check valve 91, and the exhaust check valve 91 is positioned between the diffusing pipe 8 and the split three-way pipe 62. The exhaust check valve 91 allows the flow direction of the air in the exhaust pipe 9 to be moved only from the bypass three-way pipe 62 to the exhaust gas treatment device, thereby reducing the backflow of the air into the return air box 5. The air in the auxiliary air supply pipe 72 is input into the auxiliary drying pipe 3 through the auxiliary air inlet pipe 7, and the air flow in the auxiliary drying pipe 3 is regulated by regulating the opening of the auxiliary air inlet one-way valve 71 and the opening of the diffusing one-way valve 81, so that the input amount of the secondary drying hot air is regulated according to the drying degree of the edge of the pole piece.

The implementation principle of the baking oven for preventing the pole piece from cracking is as follows: the pole piece is input into the drying box through the inlet 11, and the pole piece in the drying box is output through the outlet 12 under the action of the conveying roller 13. During the movement of the pole pieces in the drying box, both the air supply blower 43 and the split air pump 61 are started. The air supply blower 43 blows dry hot air into the main air supply pipe 42, the dry hot air which is introduced into the main drying pipe 2 by the main air supply pipe 42 is primary dry hot air, the primary dry hot air is blown to the middle position of the pole piece through the main air outlet hole 21, and then the main drying pipe 2 dries the middle position of the pole piece. The air return cover 52 is enabled by the split air pump 61 to suck the air in the box body 1 into the air return box 5 through the air return pipe 51, the air in the air return box 5 is pumped into the split three-way pipe 62 by the split air pump 61, a part of air enters the auxiliary air supply pipe 72 through the split three-way pipe 62 to form secondary drying hot air, the secondary drying hot air is blown to the edge position of the pole piece through the auxiliary air outlet hole 31, and then the auxiliary drying pipe 3 dries the edge position of the pole piece. Because the gas in the air return box 5 is the gas carrying water vapor after heat exchange of the gas in the box body 1, the temperature of the secondary drying hot gas is lower than that of the primary drying hot gas, and the humidity of the secondary drying hot gas is higher than that of the primary drying hot gas. In the pole piece drying process, the temperature of the gas received by the edge position of the pole piece is lower than that received by the middle position of the pole piece, and the humidity of the gas received by the edge position of the pole piece is higher than that received by the middle position of the pole piece. The drying speed of the edge position of the pole piece is slowed down, the situation that the edge position of the pole piece can be dried before the middle position of the pole piece is reduced, and then the situation that the pole piece is cracked is reduced, so that the effect of uniformly drying the pole piece is achieved.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (8)

1. The utility model provides a pole piece is prevented drying by fire and is split and use oven, includes box (1), import (11) are seted up to box (1) one end, export (12) are seted up to box (1) other end, set up a plurality of transfer rollers (13), its characterized in that in box (1): set up a plurality of main stoving pipes (2) in box (1), main stoving pipe (2) and transfer roller (13) parallel arrangement, set up a plurality of main ventholes (21) on main stoving pipe (2), set up a set of vice stoving pipe (3) in box (1), vice stoving pipe (3) set up with transfer roller (13) are perpendicular, set up a plurality of vice ventholes (31) on vice stoving pipe (3), one of them vice stoving pipe (3) are located main stoving pipe (2) one end, another vice stoving pipe (3) are located main stoving pipe (2) other end.

2. The drying oven for preventing cracking of pole pieces according to claim 1, wherein: main stoving pipe (2) both ends all communicate and set up main intake pipe (4), main intake pipe (4) are kept away from main stoving pipe (2) one end and are run through box (1), main intake pipe (4) are located box (1) outer one end and set up main air supply pipe (42) jointly, the intercommunication sets up air supply air-blower (43) on main air supply pipe (42).

3. The drying oven for preventing cracking of pole pieces according to claim 2, wherein: the main air inlet pipe (4) is provided with a main air inlet one-way valve (41).

4. The drying oven for preventing cracking of pole pieces according to claim 1, wherein: set up return air cover (52) between adjacent main stoving pipe (2), return air cover (52) top intercommunication sets up return air pipe (51), return air pipe (51) are kept away from return air cover (52) one end and are run through box (1), return air pipe (51) are located and communicate jointly and set up return air case (5) on the outer one end of box (1), set up on return air case (5) reposition of redundant personnel subassembly (6), reposition of redundant personnel subassembly (6) are used for in with return air case (5) in some gas input pair stoving pipe (3).

5. The drying oven for preventing cracking of pole pieces according to claim 4, wherein: the air distribution assembly (6) comprises a distribution air pump (61) and a distribution three-way pipe (62), wherein the input end of the distribution air pump (61) is communicated with the air return box (5), the output end of the distribution air pump (61) is communicated with the inlet of the distribution three-way pipe (62), one outlet of the distribution three-way pipe (62) is communicated with an exhaust pipe (9), the other outlet of the distribution three-way pipe (62) is communicated with a secondary air supply pipe (72), and one end of the secondary air supply pipe (72) far away from the distribution three-way pipe (62) is communicated with the secondary drying pipe (3).

6. The drying oven for preventing cracking of pole pieces according to claim 5, wherein: the auxiliary drying pipe (3) is communicated with the auxiliary air inlet pipe (7), the auxiliary air inlet check valve (71) is arranged on the auxiliary air inlet pipe (7), and one end, far away from the auxiliary drying pipe (3), of the auxiliary air inlet pipe (7) is communicated with the auxiliary air supply pipe (72).

7. The drying oven for preventing cracking of pole pieces according to claim 6, wherein: the auxiliary air inlet pipe (7) is communicated with the air outlet pipe (8), the air outlet pipe (8) is provided with an air outlet check valve (81), and one end, far away from the auxiliary air inlet pipe (7), of the air outlet pipe (8) is communicated with the air outlet pipe (9).

8. The drying oven for preventing cracking of pole pieces according to claim 7, wherein: an exhaust one-way valve (91) is arranged on the exhaust pipe (9), and the exhaust one-way valve (91) is positioned between the diffusing pipe (8) and the split-flow three-way pipe (62).