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CN-122006971-A - Battery diaphragm coating equipment

CN122006971ACN 122006971 ACN122006971 ACN 122006971ACN-122006971-A

Abstract

The invention relates to the technical field of diaphragm coating, in particular to battery diaphragm coating equipment which solves the technical problems of complicated replacement, low efficiency and poor coating precision caused by the fact that the width of a coating opening of the traditional battery diaphragm coating equipment is not adjustable or inconvenient to adjust, and comprises a storage box, wherein an inner cavity is formed in the storage box, a conveying pipe communicated with the inner cavity is arranged on the storage box, the conveying pipe is used for conveying coating slurry into the inner cavity, one end of the inner cavity is provided with a coating opening communicated with the inner cavity, the coating opening is used for discharging the coating slurry, two sides of the inner cavity are provided with baffle plates matched with the inner cavity, and the baffle plates are in sliding fit with the inner cavity and are driven to slide along the inner cavity for position adjustment; the storage box is provided with a lead screw, the lead screw is connected with the baffle, and the lead screw is rotated to adjust the interval between the baffles at two sides in the inner cavity, thereby adjusting the width of the coating slurry discharged from the coating port.

Inventors

  • LIU XIANGCHUN
  • TANG LI

Assignees

  • 深圳市鼎泰祥新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. The battery diaphragm coating equipment comprises a storage box (1), wherein an inner cavity (2) is formed in the storage box (1), a conveying pipe (6) communicated with the inner cavity (2) is arranged on the storage box (1), the conveying pipe (6) is used for conveying coating slurry into the inner cavity (2), and the battery diaphragm coating equipment is characterized in that a coating opening (3) communicated with the inner cavity (2) is formed in one end of the inner cavity (2), the coating opening (3) is used for discharging coating slurry, baffles (4) matched with the inner cavity (2) are arranged on two sides of the inner cavity (2), the baffles (4) are in sliding fit with the inner cavity (2) and are used for carrying out position adjustment along the inner cavity (2) through driving, a lead screw (5) is arranged on the storage box (1), the lead screw (5) is connected with the baffles (4) through rotation, and the distance between the two sides (4) in the inner cavity (2) is adjusted, so that the width of the coating slurry is discharged from the coating opening (3) is adjusted.
  2. 2. The battery diaphragm coating apparatus according to claim 1, wherein the inner cavity (2) comprises a storage cavity (201) and a flow cavity (202) which are communicated with each other, the bottom end of the storage cavity (201) is lower than the bottom end of the flow cavity (202), and the coating slurry enters the storage cavity (201) of the inner cavity (2) through the conveying pipe (6) first, flows through the flow cavity (202) and finally is discharged from the coating port (3).
  3. 3. The battery separator coating apparatus according to claim 2, wherein the baffle (4) includes a first blocking portion (401) that mates with the reservoir chamber (201) and a second blocking portion (402) that mates with the flow chamber (202).
  4. 4. The battery diaphragm coating device according to any one of claims 1 to 3, wherein two lead screws (5) are arranged and respectively installed on two sides of the storage box (1), mounting pieces (7) are installed on two sides of the storage box (1), the lead screws (5) are in threaded connection with the mounting pieces (7), and the lead screws (5) are in rotary connection with the baffle plate (4).
  5. 5. The battery separator coating apparatus according to claim 1, further comprising a support roller (9) disposed opposite to the coating port (3), the support roller (9) being for supporting the separator (8) passing through the coating port (3), and a distance between the support roller (9) and the coating port (3) being adjustable to adapt to the separator (8) of different thicknesses for coating work.
  6. 6. The battery separator coating apparatus according to claim 5, further comprising a plurality of guide rollers (10), the separator (8) passing through the guide rollers (10), the guide rollers (10) guiding a conveying direction of the separator (8).
  7. 7. The battery separator coating apparatus according to claim 6, further comprising a bracket (11) for mounting the cartridge (1), the support roller (9) and the guide roller (10).
  8. 8. The battery diaphragm coating equipment according to claim 7, wherein the supporting roller (9) is slidably connected with the bracket (11), the distance between the supporting roller (9) and the coating opening (3) is adjusted by sliding the supporting roller (9), the supporting roller (9) is provided with a mounting frame (12), the supporting roller (9) is rotatably connected with the mounting frame (12), the bracket (11) is provided with a first slideway (13), the mounting frame (12) is slidably connected with the first slideway (13) so as to realize the sliding connection between the supporting roller (9) and the bracket (11), the bracket (11) is fixedly provided with a mounting plate (14), the mounting plate (14) is provided with a threaded rod (15) through threaded connection, the end part of the threaded rod (15) is rotatably connected with the mounting frame (12), and the distance between the supporting roller (9) and the coating opening (3) is adjusted through rotating the threaded rod (15).
  9. 9. Battery separator coating device according to any one of claims 5-8, characterized in that the cartridge (1) is provided with a top shaft (16) and a spring (17) providing an elastic force for the movement of the top shaft (16) towards the support roller (9), the elastic force of the spring (17) moving the top shaft (16) towards the support roller (9), the top shaft (16) being in abutment with the support roller (9) for pressing the separator (8) passing over the support roller (9).
  10. 10. The battery diaphragm coating equipment according to claim 9, wherein the storage box (1) is provided with a connecting frame (18), the connecting frame (18) is provided with a supporting rod (19), the supporting rod (19) is in sliding connection with the connecting frame (18), the supporting rod (16) is rotatably arranged on the supporting rod (19), the outer wall of the supporting rod (19) is fixedly provided with a fixing block (20), the bottom of the connecting frame (18) is fixedly connected with a fixing plate (21), the supporting rod (19) is in sliding connection with the fixing plate (21), the spring (17) is arranged between the fixing plate (21) and the fixing block (20), the elastic force of the spring (17) acts between the fixing plate (21) and the fixing block (20) to enable the supporting rod (16) to move towards the supporting roller (9), the supporting rod (19) penetrates through the fixing plate (21), the tail of the supporting rod (19) is provided with a handle (22), the storage box (1) is fixedly provided with a second slideway (23), the connecting frame (18) and the second slideway (23) is matched with the second slideway (18) to be connected with the connecting frame (18) through the sliding frame (24) through the sliding connection of the connecting frame (18), the screwing end of the jackscrew (24) can be abutted against the second slide way (23) so as to fix the position of the connecting frame (18).

Description

Battery diaphragm coating equipment Technical Field The invention relates to the technical field of diaphragm coating, in particular to battery diaphragm coating equipment. Background The battery separator is one of the core components of a lithium ion battery, and its performance directly determines the safety, cycling stability and energy density of the battery. In the working process of the battery, the separator is required to effectively separate the direct contact of the anode and the cathode so as to avoid internal short circuit, and meanwhile, a channel is provided for lithium ion migration. In order to further improve the high temperature resistance, puncture resistance, electrolyte wettability and thermal stability of the diaphragm and prevent the safety problems of thermal runaway and the like caused by contraction, breakage or lithium dendrite puncture of the diaphragm in the charge and discharge process of the battery, a coating process is generally adopted in the industry to coat functional slurry such as a ceramic coating, a polymer coating and the like on the surface of the diaphragm, and a uniform functional layer is formed through coating, so that the effects of enhancing insulation protection, improving structural strength, optimizing interface compatibility and the like are realized, and the overall performance and the service life of the battery are improved. In the existing battery separator coating equipment, the main stream coating modes mainly comprise two types of slit coating and spray nozzle coating. The coating port of the slit type coating equipment is of a fixed structure, and the width size of the coating port is fixed after the equipment leaves the factory and cannot be adjusted. In the actual production process, when the diaphragms with different width specifications are required to be coated, or the width of a coating area on the surface of the diaphragm is regulated according to the technological requirements of products, the original coating device can only be stopped and disassembled due to the invariable width of the coating opening, the corresponding coating opening assembly with the matched coating width is replaced, and then the installation, the debugging and the calibration are carried out again. The replacement process is complex to operate, a large amount of labor and time are consumed, the production line is interrupted, the overall production efficiency is reduced, and equipment abrasion and fault risks are easily increased due to frequent replacement of parts. For equipment adopting spray head type coating, although the coating width can be changed theoretically by adjusting spray head arrangement or the slurry outlet range of a single spray head, the existing spray head adjusting mechanism is mostly manually adjusted or simply mechanically adjusted, the adjusting process is complicated, the precision is difficult to accurately control, and the problems of coating width deviation, uneven edge coating, slurry accumulation or coating leakage and the like are easy to occur. Meanwhile, the difficulty of cooperative adjustment of the nozzle spacing and the slurry discharge amount is high, coating requirements of different specifications cannot be quickly adapted, and repeated test coating calibration is needed after adjustment, so that production continuity and product quality stability are affected, and the production requirements of the lithium battery industry on membrane coating diversification, high precision and high efficiency are difficult to meet. Disclosure of Invention Aiming at the defects of the prior art, the invention provides battery diaphragm coating equipment, which solves the technical problems of complicated replacement, low efficiency and poor coating precision caused by the fact that the width of a coating opening of the traditional battery diaphragm coating equipment is not adjustable or is inconvenient to adjust. The battery diaphragm coating equipment comprises a storage box, wherein an inner cavity is formed in the storage box, a conveying pipe communicated with the inner cavity is arranged on the storage box, the conveying pipe is used for conveying coating slurry into the inner cavity, a coating opening communicated with the inner cavity is formed in one end of the inner cavity, the coating opening is used for discharging the coating slurry, baffles matched with the inner cavity are arranged on two sides of the inner cavity, the baffles are in sliding fit with the inner cavity and are driven to slide along the inner cavity for position adjustment, and a lead screw is arranged on the storage box and connected with the baffles and is rotated to adjust the interval between the baffles on two sides in the inner cavity, so that the width of the coating slurry discharged from the coating opening is adjusted. Further, the inner cavity comprises a storage cavity and a flow cavity which are communicated with each other, the bottom end of the sto