A processing device for producing battery positive electrode sheets

Abstract

The invention relates to the technical field of battery pole piece processing devices, and specifically discloses a processing device for producing battery positive pole pieces. The bottom of a frame inner cavity is sequentially provided with an unwinding part, a driving part, a spraying part, a material storage part and a winding part from one end. The frame inner cavity is provided with a drying part located above the spraying part. The spraying part includes a mold body and a slurry pipe. The unwinding part is provided with two unwinding stations. An automatic tape connection part is provided at a position between the winding part and the driving part at the bottom of the frame inner cavity. A spraying groove is provided at the inner end of a gasket provided between the upper and lower mold bodies of the mold body. Slurry buffer chambers are respectively provided at the inner ends of the corresponding slurry pipes in the lower mold body. The drying part includes a drying furnace, a drying pipeline, a fan and a heat exchanger. The bottom end of the inner cavity of the drying pipeline arranged in the vertical direction is provided with a shutter structure, and the inclination angle of the inner blades is 30 to 60 degrees. The invention solves the problem that the low integration degree of battery pole piece production equipment leads to low product production efficiency and difficulty in ensuring the product yield.

Description

Technical Field

[0001] The invention relates to the technical field of battery pole piece processing devices, and in particular to a processing device for producing battery positive pole pieces. Background Art

[0002] In the manufacturing process of battery pole pieces (such as pole pieces of lithium batteries and nickel-metal hydride batteries), the rolled strip needs to be placed in the unwinding station first, and the conveying roller transfers the strip to the coating station for coating. The coated strip is transferred to the drying device for drying, and the dried strip is reeled in the reeling station to complete the processing of the pole piece.

[0003] At present, after the previous roll of strip is unwound, the end of the pole piece of the roll is connected to the beginning of the next roll of strip, which usually requires manual processing and the entire production line needs to be stopped during the process; in addition, when drying the pole piece, it is often carried out in a horizontal drying pipeline, which not only occupies a large area, but also has poor drying effect and is easy to cause the pole piece to break. In short, the current pole piece processing equipment has a low degree of integration and it is difficult to achieve integrated continuous production, which not only seriously affects the processing efficiency, but also makes it difficult to guarantee the product yield. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the current battery pole piece production equipment has a low degree of integration, resulting in low product production efficiency and difficulty in ensuring product yield.

[0005] To achieve the above-mentioned purpose, a processing device for producing positive electrode sheets of batteries comprises a stand, wherein the bottom of the inner cavity of the stand is provided with an unwinding part, a driving part, a spraying part, a material storage part and a winding part in sequence from one end, the inner cavity of the stand is provided with a drying part above the spraying part, the spraying part comprises a mold body and a slurry pipe, the unwinding part is provided with two unwinding stations, the bottom of the inner cavity of the stand is provided with an automatic tape splicing part at a position between the unwinding part and the driving part, the automatic tape splicing part comprises a tape splicing part frame, the tape splicing part frame is provided with two conveying roller groups at the top and bottom of one end near the unwinding part in an axially symmetrical relationship, and the opening formed at an angle between the two conveying roller groups faces the unwinding part, the tape splicing part frame is rotatably connected to a pressing roller frame at a position near the inner end of the conveying roller group, the pressing roller frame and the conveying roller group are parallel to each other, the inner cavity of the pressing roller frame is rotatably connected to a plurality of pressing rollers, and the pressing rollers are in a parallel relationship with the rollers of the conveying roller group, Two parallel belt-joining pressure rollers are arranged in the inner cavity of the belt-joining part frame near the inner end of the conveying roller group;

[0006] The mold body comprises a lower mold body and an upper mold body, a gasket is arranged between the upper surface of the lower mold body and the lower surface of the upper mold body, the slurry pipes are respectively connected to the outer side surface of the lower mold body, and the lower mold body is provided with slurry buffer cavities at the inner end positions corresponding to the slurry pipes, and the top end of the slurry buffer cavity passes through the upper surface of the lower mold body, and the inner end of the gasket surface is provided with a spraying groove, and the center distance between adjacent spraying grooves is equal to the center distance between adjacent slurry buffer cavities;

[0007] The drying section includes a drying furnace, a drying pipe, a fan and a heat exchanger. The drying pipe is vertically fixedly connected to one end of the top surface of the drying furnace in the vertical direction. The top of the drying pipe is connected to a top box body. An exhaust pipe is connected between the top box body and the fan. The output end of the fan is connected to the input end of the heat exchanger. An air supply pipe is connected between the output end of the heat exchanger and the drying furnace. Arc bends are respectively provided at the corners of the exhaust pipe and the air supply pipe. A shutter structure is provided at the bottom end of the inner cavity of the drying pipe in the horizontal direction, and the inclination angle of the blades in the shutter structure is 30 to 60°.

[0008] Preferably, two pressing cylinders in an axially symmetrical relationship are installed in the middle of the tape splicing frame near one end of the unwinding portion, and the pressing cylinders extend horizontally along the axial direction of the tape splicing frame, and the telescopic ends of the pressing cylinders are rotatably connected to the outer end of the pressure roller frame.

[0009] Preferably, the net distance between the two splicing rollers in the inner cavity of the splicing part frame is 0.556~0.568mm.

[0010] Preferably, end plates are respectively provided on the front and back sides of the mold body, and the end plates are fixedly connected to the front and back sides of the upper mold body and the lower mold body by bolts, respectively.

[0011] Preferably, a sealing structure is formed between the lower surface of the upper mold body and the upper surface of the gasket, and between the upper surface of the lower mold body and the lower surface of the gasket.

[0012] Preferably, the inclination angle of the blades in the shutter structure at the bottom end of the inner cavity of the drying duct is 45°.

[0013] Preferably, the discharging end of the drying section and the feeding end of the storage section are provided with a first auxiliary driving section for assisting in the transmission of the battery electrode strip.

[0014] Preferably, a second auxiliary driving part for assisting the transmission of the motor pole piece strip is provided between the discharge end of the material storage part and the winding part. Preferably, the winding part is provided with two winding stations.

[0015] Preferably, a plurality of rollers for adjusting the direction of the battery electrode strip are respectively arranged between the two unwinding stations of the unwinding section and the automatic strip splicing section.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The battery pole piece processing device of the present invention realizes the integrated management of each battery processing station.

[0018] This not only reduces the footprint of the equipment, but also realizes the continuous production and processing of battery electrode strips, greatly improving production efficiency.

[0019] 2. The drying section involved in the present invention sets the drying duct vertically and sets a shutter structure at the bottom of the inner cavity of the drying duct, so that when the electrode strip is dried in the drying duct, the flow direction of the hot air is inclined, which is beneficial to the uniform drying of the electrode surface and the stable operation of the electrode; the bend setting of the exhaust pipe and the air supply pipe avoids the generation of eddy currents in the corners of the pipe, ensures the smooth flow of the air flow, and achieves the effect of avoiding the breakage and damage of the electrode due to severe shaking; at the same time, the pressure loss during the circulation of the hot air is reduced, so that the energy consumption of the fan is reduced; in addition, the heat distribution in the drying duct is uniform, thereby improving the qualified rate of the electrode drying processing.

[0020] 3. The automatic tape splicing device involved in the present invention can automatically connect the end of the previous roll of tape with the beginning of the next roll of tape through the tape splicing roller, which greatly improves the efficiency of tape splicing. At the same time, the tape splicing process does not require the entire production line to be stopped, thereby ensuring the uninterrupted operation of the entire production process, thereby improving production efficiency and meeting the needs of automated production.

[0021] 4. The spraying part involved in the present invention controls the spraying width by the width of the spraying groove on the gasket. When the spraying width needs to be adjusted, it only needs to replace the corresponding gasket, which not only saves time and labor, but also greatly saves production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of the overall main structure of the present invention;

[0023] FIG2 is a schematic diagram of the three-dimensional structure of the drying section of the present invention;

[0024] FIG3 is a schematic diagram of the three-dimensional structure of the automatic tape splicing unit of the present invention; FIG4 is a schematic diagram of the front view of the mold body of the present invention;

[0025] FIG5 is a schematic side view of the structure of the mold body of the present invention;

[0026] FIG. 6 is a schematic diagram of the top structure of the lower mold body of the present invention; FIG. 7 is a schematic diagram of the top structure of the gasket of the present invention.

[0027] In the figure: 1-stand; 2-unwinding part; 3-driving part; 4-spraying part; 401-mold body; 4011-lower mold body; 40111-slurry buffer chamber; 4012-upper mold body; 4013-end plate; 402-slurry pipe; 403-gasket; 4031-spraying tank; 5-drying part; 501-drying furnace; 502-drying pipeline; 503-top box; 504-exhaust pipe; 505-blower; 506-heat exchanger; 507-air supply pipe; 6-rewinding part; 7-automatic splicing part; 701-splicing part frame; 702-conveying roller group; 703-pressing roller frame; 704-pressing roller; 705-pressing cylinder; 706-splicing pressing roller; 8-material storage part; 9-first auxiliary driving part; 10-second auxiliary driving part. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Please refer to Figures 1-7. The present invention provides a technical solution, a processing device for producing battery positive electrode sheets, including a stand 1, the bottom of the inner cavity of the stand 1 is sequentially provided with an unwinding part 2, a driving part 3, a spraying part 4, a material storage part 8 and a winding part 6 starting from one end, the inner cavity of the stand 1 is provided with a drying part 5 above the spraying part 4, the spraying part 4 includes a mold body 401 and a slurry pipe 402, the unwinding part 2 is provided with two unwinding stations, the bottom of the inner cavity of the stand 1 is located between the unwinding part 2 and the driving part 3, and the automatic splicing part 7 includes a splicing part frame 701, and the splicing part frame 701 is provided with two conveying roller groups 702 at the top and bottom of one end close to the unwinding part 2 according to an axially symmetrical relationship, and the opening formed at an angle between the two conveying roller groups 702 faces the unwinding part 2, and the splicing part frame 701 is close to the conveying roller group 702. The inner end is rotatably connected to a pressure roller frame 703, the pressure roller frame 703 and the conveying roller group 702 are parallel to each other, the inner cavity of the pressure roller frame 703 is rotatably connected to a plurality of pressure rollers 704, the pressure rollers 704 and the rollers of the conveying roller group 702 are in parallel relationship, and two parallel pressure rollers 706 are arranged in the inner cavity of the tape splicing frame 701 near the inner end of the conveying roller group 702;

[0030] The mold body 401 includes a lower mold body 4011 and an upper mold body 4012, a gasket 403 is arranged between the upper surface of the lower mold body 4011 and the lower surface of the upper mold body 4012, the slurry tubes 402 are respectively connected to the outer side of the lower mold body 4011, and the lower mold body 4011 is provided with slurry buffer cavities 40111 at the inner end positions corresponding to the slurry tubes 402, and the top of the slurry buffer cavity 40111 passes through the upper surface of the lower mold body 4011, and the inner end of the surface of the gasket 403 is provided with a spraying groove 4031, and the center distance between adjacent spraying grooves 4031 is equal to the center distance between adjacent slurry buffer cavities 40111;

[0031] The drying section 5 includes a drying furnace 501, a drying pipe 502, a fan 505 and a heat exchanger 506. The drying pipe 502 is vertically fixedly connected to one end of the top surface of the drying furnace 501 in the vertical direction. The top of the drying pipe 502 is connected to the top box 503. An exhaust pipe 504 is connected between the top box 503 and the fan 505. The output end of the fan 505 is connected to the input end of the heat exchanger 506. An air supply pipe 507 is connected between the output end of the heat exchanger 506 and the drying furnace 501. Arc bends are respectively provided at the corners of the exhaust pipe 504 and the air supply pipe 507. A shutter structure is provided at the bottom end of the inner cavity of the drying pipe 502 in the horizontal direction, and the inclination angle of the blades in the shutter structure is 30 to 60 degrees.

[0032] In this embodiment, two pressing cylinders 705 in an axially symmetrical relationship are installed in the middle of the tape splicing frame 701 near one end of the unwinding portion 2. The pressing cylinders 705 extend horizontally along the axial direction of the tape splicing frame 701, and the telescopic ends of the pressing cylinders 705 are rotatably connected to the outer ends of the pressure roller frames 703; when in use, the pressure roller frames 703 can be driven to rotate relative to the corresponding conveying roller groups 702 through the telescopic movement of the pressing cylinders 705, so as to adjust the pressure of the pressing rollers 704 in the pressure roller frames 703 on the conveying roller groups 702 conveying the tape.

[0033] In this embodiment, the net distance between the two tape splicing rollers 706 in the inner cavity of the tape splicing frame 701 is 0.556-0.568 mm.

[0034] In this embodiment, the front and back sides of the mold body 401 are respectively provided with end plates 4013, which are fixedly connected to the front and back sides of the upper mold body 4012 and the lower mold body 4011 by bolts; so that when in use, the end plates 4013 improve the connection strength between the upper mold body 4012 and the lower mold body 4011.

[0035] In this embodiment, sealing structures are respectively formed between the lower surface of the upper mold body 4012 and the upper surface of the gasket 403, and between the upper surface of the lower mold body 4011 and the lower surface of the gasket 403; so that when in use, slurry leakage between the contact surfaces of the upper mold body 4012, the lower mold body 4011 and the gasket 403 can be avoided.

[0036] In this embodiment, the inclination angle of the blades in the shutter structure at the bottom end of the inner cavity of the drying duct 502 is 45°.

[0037] In this embodiment, the first auxiliary driving part 9 for assisting the transmission of the battery pole piece strip is provided between the discharge end of the drying part 5 and the feed end of the storage part 8; the second auxiliary driving part 10 for assisting the transmission of the motor pole piece strip is provided between the discharge end of the storage part 8 and the winding part 6; when in use, the first auxiliary driving part 9 and the second auxiliary driving part 10 are used to supplement the driving of the strip to ensure smooth running of the strip and linear running speed.

[0038] In this embodiment, the winding section 6 is provided with two winding stations, so that when in use, the winding efficiency is increased and the downtime is reduced.

[0039] In this embodiment, a plurality of rollers for adjusting the direction of the battery electrode strip are respectively arranged between the two unwinding stations of the unwinding section 2 and the automatic strip splicing section 7 .

[0040] Working principle: firstly, place the first coil of strip on one of the unwinding stations of the unwinding section 2, and complete the loading process of the first coil of strip; the starting end of the first coil of strip passes through the conveying roller group 702, the strip pressing roller 706, and the driving section 3 in sequence, and then enters the spraying section for slurry spraying process; wherein, the slurry enters the slurry buffer chamber 40111 of the lower mold body 4011 through the slurry pipe 402, and the slurry is sprayed onto the surface of the strip through the open end of the spraying groove 4031 on the gasket 403, and the mold body 401 is arranged in pairs to realize simultaneous spraying of both sides of the strip; the sprayed strip is transmitted into the drying pipe 502, and the hot air generated by the drying furnace 501 enters the drying pipe 502 after the direction adjustment effect of the shutter structure to dry the strip; the exhaust gas enters the top box 503 through the top of the drying pipe 502, and then passes through the exhaust pipe 504 The gas is discharged to the heat exchanger 506 through the fan 505, and the gas after heat exchange enters the drying furnace 501 through the air supply pipe 507 for heating and then re-enters the drying pipeline 502 to realize the drying gas circulation to dry the strip; the strip after drying enters the storage part 8 for temporary storage through the auxiliary transmission function of the first auxiliary drive part 9; then the strip is assisted by the second auxiliary drive part 10 from the discharge end of the storage part 8 to a winding station of the winding part 6 for winding; when one winding station is wound, the strip can be quickly cut and repositioned to another winding station for winding; during the processing of the first roll of strip, the second roll of strip is placed on another unwinding station of the unwinding part 2 for standby, and the starting end of the second roll of strip is conveyed to the inner end of the conveying roller group 702 through another conveying roller group 702 for retention;

[0041] When the end of the first roll of strip is about to be transmitted to the inner end of the corresponding conveyor roller group 702, the corresponding conveyor roller group 702 of the second roll of strip is started, so that the end of the first roll of strip and the beginning of the second roll of strip pass through the position between the upper and lower strip-joining rollers 706 at the same time. The two strip-joining rollers 706 press the end of the first roll of strip and the beginning of the second roll of strip to realize the automatic strip-joining process; when the spray width of the strip by the mold body 401 needs to be changed, the gasket 403 with the spray groove 4031 of the corresponding width can be replaced in advance.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A processing device for producing positive electrode sheets of a battery, comprising a stand (1), wherein the bottom of the inner cavity of the stand (1) is provided with an unwinding section (2), a driving section (3), a spraying section (4), a material storage section (8) and a winding section (6) in sequence from one end, wherein the inner cavity of the stand (1) is provided with a drying section (5) above the spraying section (4), wherein the spraying section (4) comprises a mold body (401) and a slurry pipe (402), characterized in that: The unwinding section (2) is provided with two unwinding stations, and an automatic tape splicing section (7) is provided at a position between the unwinding section (2) and the driving section (3) at the bottom of the inner cavity of the platform (1), and the automatic tape splicing section (7) comprises a tape splicing section frame (701), and two conveying roller groups (702) are provided at the top and bottom of one end of the tape splicing section frame (701) close to the unwinding section (2) in an axially symmetrical relationship, and an opening formed at an angle between the two conveying roller groups (702) faces the unwinding section (2), and a pressure roller frame (703) is rotatably connected to the tape splicing section frame (701) at a position close to the inner end of the conveying roller group (702), and the pressure roller frame (703) and the conveying roller group (702) are rotatably connected. The inner cavity of the pressure roller frame (703) is rotatably connected to a plurality of pressure rollers (704), the pressure rollers (704) are in parallel with the rollers of the conveying roller group (702), and two parallel tape-joining pressure rollers (706) are arranged in the inner cavity of the tape-joining frame (701) near the inner end of the conveying roller group (702); The mold body (401) comprises a lower mold body (4011) and an upper mold body (4012), a gasket (403) is arranged between the upper surface of the lower mold body (4011) and the lower surface of the upper mold body (4012), the slurry tubes (402) are respectively connected to the outer side surfaces of the lower mold body (4011), and slurry buffer cavities (40111) are respectively arranged in the lower mold body (4011) at the inner ends of the slurry tubes (402), and the top ends of the slurry buffer cavities (40111) penetrate the upper surface of the lower mold body (4011), and a spraying groove (4031) is opened at the inner end of the surface of the gasket (403), and the center distance between adjacent spraying grooves (4031) is equal to the center distance between adjacent slurry buffer cavities (40111); The drying section (5) comprises a drying furnace (501), a drying pipe (502), a fan (505) and a heat exchanger (506); the drying pipe (502) is vertically fixedly connected to one end of the top surface of the drying furnace (501) in a vertical direction; the top end of the drying pipe (502) is connected to a top box (503); an exhaust pipe (504) is connected between the top box (503) and the fan (505); the output end of the fan (505) is connected to the input end of the heat exchanger (506); an air supply pipe (507) is connected between the output end of the heat exchanger (506) and the drying furnace (501); arc-shaped bends are respectively arranged at the corners of the exhaust pipe (504) and the air supply pipe (507); a shutter structure is arranged at the bottom end of the inner cavity of the drying pipe (502) in a horizontal direction, and the inclination angle of the blades in the shutter structure is 30 to 60 degrees.

2. A processing device for producing a positive electrode sheet of a battery according to claim 1, characterized in that: Two pressing cylinders (705) are installed in an axially symmetrical relationship in the middle of the tape splicing frame (701) near one end of the unwinding frame (2). The pressing cylinders (705) extend horizontally along the axial direction of the tape splicing frame (701), and the telescopic ends of the pressing cylinders (705) are rotatably connected to the outer ends of the pressure roller frame (703).

3. A processing device for producing a positive electrode sheet of a battery according to claim 2, characterized in that: The net distance between the two splicing pressure rollers (706) in the inner cavity of the splicing unit frame (701) is 0.556-0.568 mm.

4. A processing device for producing a positive electrode sheet of a battery according to claim 1, characterized in that At: End plates (4013) are respectively provided on the front and back sides of the mold body (401), and the end plates (4013) are respectively fixedly connected to the front and back sides of the upper mold body (4012) and the lower mold body (4011) via bolts.

5. The processing device for producing a positive electrode sheet of a battery according to claim 1, characterized in that: There are sealing structures between the lower surface of the upper mold body (4012) and the upper surface of the gasket (403), and between the upper surface of the lower mold body (4011) and the lower surface of the gasket (403).

6. The processing device for producing a positive electrode sheet of a battery according to claim 1, characterized in that: The inclination angle of the blades in the shutter structure at the bottom end of the inner cavity of the drying pipe (502) is 45°.

7. A processing device for producing a positive electrode sheet of a battery according to claim 1, characterized in that: The discharge end of the drying section (5) and the feed end of the storage section (8) are provided with a first auxiliary driving section (9) for assisting in the transmission of the battery electrode strip.

8. The processing device for producing a positive electrode sheet of a battery according to claim 1, characterized in that: A second auxiliary driving part (10) for assisting in the transmission of the motor pole piece strip is provided between the discharge end of the material storage part (8) and the winding part (6).

9. The processing device for producing a positive electrode sheet of a battery according to claim 1, characterized in that: The winding section (6) is provided with two winding stations.

10. The processing device for producing a positive electrode sheet of a battery according to claim 1, characterized in that: A plurality of rollers for adjusting the direction of the battery electrode strip are respectively arranged between the two unwinding stations of the unwinding section (2) and the automatic strip splicing section (7).

Images