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CN-224210644-U - Coating roll forming equipment in dry electrode production

CN224210644UCN 224210644 UCN224210644 UCN 224210644UCN-224210644-U

Abstract

The utility model relates to coating roll forming equipment in dry electrode production, which is provided with a frame, wherein the lower part of the frame is provided with a powder forming roll set, the upper part of the frame is provided with a coating forming roll set consisting of a plurality of rolls, the powder forming roll set comprises two compression rolls which move inwards relatively, the coating forming roll set is positioned above the powder forming roll set, the top of the coating forming roll set is provided with a compression roll, the upper sides of the two ends of the compression roll are provided with vertical compression elements, the lower part of the compression roll is provided with a plurality of forming rolls, the axes of all the forming rolls are parallel, the two ends of the compression roll are provided with horizontal swing adjusting mechanisms, and the horizontal swing adjusting mechanisms drive the two ends of the compression roll to move in two directions, so that the compression roll swings around the middle position in the horizontal direction, and the axis of the compression roll is parallel or horizontally crossed with the axis of a first forming roll. The utility model improves the structure, improves the pressure of the final pressure channel, ensures the consistency of the gap in the width direction of the final pressure channel, and obtains the coating sheet with excellent performance.

Inventors

  • SHEN HONGWEI

Assignees

  • 博路威(深圳)智能装备有限公司

Dates

Publication Date
20260508
Application Date
20250423

Claims (11)

  1. 1. The coating roll forming equipment in the dry electrode production is characterized by comprising a frame, wherein the lower part of the frame is provided with a powder forming roll set, and the upper part of the frame is provided with a coating forming roll set consisting of a plurality of rolls; The powder forming roller set comprises two pressing rollers which relatively move inwards, wherein a powder feeding channel is arranged above the middle of the two pressing rollers; the coating forming roller set is positioned above the powder forming roller set, the top of the coating forming roller set is provided with a pressing roller, and the upper sides of the two ends of the pressing roller are provided with vertical pressing elements; A plurality of forming rollers are arranged below the pressurizing roller, and comprise a first forming roller, a second forming roller and a third forming roller; The axes of all the forming rollers are parallel, all the forming rollers are vertically distributed side by side, and a forming rolling channel is formed between two adjacent forming rollers; Forming a final-pressure channel between the first forming roll and the second forming roll; The two ends of the pressing roller are provided with horizontal swing adjusting mechanisms, and the horizontal swing adjusting mechanisms drive the two ends of the pressing roller to move towards two directions, so that the pressing roller swings horizontally around the middle position, and the axis of the pressing roller is parallel to or horizontally crossed with the axis of the first forming roller.
  2. 2. The apparatus for roll forming of coating layer in dry electrode production according to claim 1, wherein the outer sides of both ends of one of the rolls of the powder forming roll set are provided with horizontal pressing members, and the horizontal pressing members press the first roll in the horizontal direction toward the second roll.
  3. 3. The coating roll forming apparatus in dry electrode production according to claim 1, wherein a horizontal spacing adjusting mechanism is provided between both ends of two pressing rolls of the powder forming roll group; The horizontal interval adjusting mechanism adjusts the gap between two ends of the two pressing rollers.
  4. 4. The apparatus for roll forming of coated electrode according to claim 1, wherein the roll surface of the forming roll set positioned at the lowermost position is adjacent to the roll surface of one of the press rolls of the powder forming roll set, and an initial pressure passage is formed therebetween.
  5. 5. The apparatus for roll forming of coating in dry electrode production according to claim 4, wherein a thickness adjusting mechanism is provided between both ends of the upper and lower rolls of the roll-in passage.
  6. 6. The coating roll forming apparatus in dry electrode production according to claim 3 or 5, wherein the horizontal spacing adjusting mechanism in the powder forming roll group or the thickness adjusting mechanism at both ends of the roll passage is a roll gap adjusting mechanism; The roller gap adjusting mechanism is provided with a first inclined block and a second inclined block, the inclined surfaces of the two inclined blocks are attached, and the outer side surfaces of the two inclined blocks are parallel; the outer side surface of the first inclined block is connected with a roller seat of one roller; the outer side surface of the second inclined block is arranged in the sliding block, and the outer side surface of the sliding block is connected with a roller seat of the other roller; The second inclined block is in sliding connection with the sliding block; One end of the second inclined block is provided with a linear drive, and the linear drive drives the second inclined block to slide along the sliding connection direction of the second inclined block.
  7. 7. The apparatus for roll forming of coated electrode in dry electrode production according to claim 6, wherein the linear drive connected to the second inclined block comprises a drive shaft, one end of the drive shaft is inserted into the second inclined block, and a screw transmission connection is provided between the drive shaft and the second inclined block; the axis of the driving shaft is parallel to the sliding connection direction of the second inclined block; The other end of the driving shaft is connected with a driving element which is a servo motor.
  8. 8. The coating roll forming apparatus in dry electrode production according to claim 1, wherein the vertical pressing members provided above both ends of the pressing roller are hydraulic cylinders; The cylinder body of the hydraulic cylinder of the vertical pressing element is connected with the frame, a piston rod of the hydraulic cylinder of the vertical pressing element is connected with a vertical pressing seat, and two sides of the vertical pressing seat are in sliding connection with the frame in the vertical direction; The vertical pressing seat is connected with the pressing roller seat of the pressing roller in the vertical direction, and the vertical pressing seat is contacted with the pressing roller seat in the vertical direction; the left side and the right side of the pressing roller seat are in sliding connection with the frame in the vertical direction, and a horizontal gap exists between the left side and the right side of the pressing roller seat and the frame.
  9. 9. The apparatus for roll forming of coating in dry electrode production according to claim 8, wherein the horizontal swing adjusting mechanism comprises a nut adjusting block and a screw; The nut adjusting block is connected with the pressure roller seat, an internal thread is arranged in the middle of the nut adjusting block and meshed with the external thread of the screw rod to form a screw rod and nut transmission mechanism; the two ends of the screw are arranged at the bottom of the vertical pressing seat through screw seats; One end of the screw rod is connected with a horizontal swing driving element which is a servo motor and is arranged on the vertical pressing seat.
  10. 10. The coated roll forming apparatus in dry electrode production according to claim 8, wherein a limiting plate is fixed to an upper portion of the pressing roll base; a displacement monitoring sensor is arranged between the pressing roller seat and the vertical pressing seat; one part of the displacement monitoring sensor is arranged on the limiting plate, and the other part of the displacement monitoring sensor is arranged at the lower part of the vertical pressing seat.
  11. 11. The coated roll forming apparatus in dry electrode production according to claim 1, wherein a horizontal intersection angle between the axis of the pressing roll and the axis of the first forming roll is θ; 0<θ≤2°。

Description

Coating roll forming equipment in dry electrode production Technical Field The utility model relates to coating roll forming equipment used in dry electrode production, and belongs to the field of mechanical equipment. Background One important raw material in the battery is an electrode, the electrode can be prepared by adopting a dry process at present, powder is pressed into a sheet by a roller set to form an electrode powder film (or called a coating), then a current collector film (or called a base material) is input, the electrode powder film, the current collector film and the electrode powder film are pressed together by a composite roller, and the sheet of the dry electrode is formed, rolled and then the battery is produced subsequently. The dry process production process and production equipment of the electrode sheet can refer to dry process electrode sheet production equipment with the Chinese patent publication number of CN222734999U, dry electrode preparation equipment with the Chinese patent publication number of CN222320277U, dry electrode preparation equipment with the Chinese patent publication number of CN222300678U, an automatic production line for preparing dry electrode of a power battery with the Chinese patent publication number of CN116682929A, a preparation method of a dry electrode sheet with the Chinese patent publication number of CN115621410A, an electrode sheet and application thereof, a multi-roll calender with the Chinese patent publication number of CN119137756A for producing electrodes by a dry coating method, components for laminating electrode paths on two sides of a metal foil, production by using a multi-roll calender, an electrode dry rolling equipment with the Chinese patent publication number of CN119773291A, a lithium battery production method and other patent documents. In order to improve the production efficiency, the rolling manufacturing process of the electrode powder diaphragm and the composite rolling process of the electrode powder diaphragm, the current collector film and the electrode powder diaphragm are generally integrated together at present to produce, so that the rolling and the circulation of the electrode powder diaphragm are reduced, and the efficiency is improved. In the case of roll-pressing electrode powder sheets, it is desirable to increase the pressure between rolls as much as possible, so that the powder can be compacted more tightly, on the one hand, the mechanical strength of the sheet can be increased, and on the other hand, the density of the sheet can be increased, thereby increasing the energy density of the battery when the battery is assembled. However, in the existing double-sided film-forming dry electrode production equipment, a roller set for producing electrode powder films is limited by a roller set structure, and cannot provide great pressure for rolling powder, when the rolling pressure is increased, the flat roller surface is stressed to deform, so that the roller spacing on the breadth is inconsistent, the film thickness of the produced electrode powder films in the width direction is inconsistent, and finally, the produced dry electrode sheet also has the problem of inconsistent film thickness, and the problems of uneven current distribution, unstable battery capacity, abnormal heating and the like are easily caused when the battery is produced. Therefore, there is a need for an improved roll forming apparatus for electrode powder sheets in order to be able to apply a greater pressure against the roll production of electrode powder sheets, thereby producing dry electrode sheets with better properties. Disclosure of utility model The utility model aims to provide coating roll forming equipment in dry electrode production, which realizes high-efficiency stable continuous production of coating sheets, improves the pressure of a final pressure channel, ensures the consistency of gaps in the width direction of the final pressure channel and obtains the coating sheets with better performance. In order to achieve the aim of the utility model, the utility model provides coating roll forming equipment in dry electrode production, which is provided with a frame, wherein the lower part of the frame is provided with a powder forming roll set, and the upper part of the frame is provided with a coating forming roll set consisting of a plurality of rolls; The powder forming roller set comprises two pressing rollers which relatively move inwards, wherein a powder feeding channel is arranged above the middle of the two pressing rollers; the coating forming roller set is positioned above the powder forming roller set, the top of the coating forming roller set is provided with a pressing roller, and the upper sides of the two ends of the pressing roller are provided with vertical pressing elements; A plurality of forming rollers are arranged below the pressurizing roller, and comprise a first forming roller, a second forming roller and a t