CN-121355398-B - Dry electrode film rolling compounding equipment and compounding method

Abstract

The invention relates to the technical field of dry electrode film preparation, and discloses dry electrode film rolling and compounding equipment, which comprises a pre-compounding unpowered unreeling component, a hot-pressing roller component and two isolating film unreeling components, wherein the hot-pressing roller component is provided with a hot-pressing gap, the pre-compounding unpowered unreeling component comprises a current collector unreeling shaft, a pre-compounding roller and two dry film unreeling shafts which are sequentially arranged along a second direction, a dry film gap is formed between the two dry film unreeling shafts, a tangent line of the outer diameter of the pre-compounding roller and the midpoint of the dry film gap along the second direction are sequentially arranged along the first direction and are projected to coincide, and the two isolating film unreeling components are sequentially arranged along the second direction. The dry electrode film rolling composite equipment avoids that the isolation film for protection is impacted and attached to the current collector due to air flow disturbance or tension fluctuation, and meanwhile avoids that the isolation film is wrinkled, so that the defect rate is effectively reduced, and the rolling composite quality and the rolling composite operation stability are improved.

Inventors

• XIA LI

Assignees

• 深圳市科晶智达科技有限公司

Dates

Publication Date

20260508

Application Date

20251222

Claims (8)

1. 1. The dry electrode film rolling and compounding equipment is characterized by comprising a pre-compounding unpowered unreeling component, a hot-pressing roller component with a hot-pressing gap and two isolating film unreeling components; The pre-composite unpowered unreeling component comprises a current collector unreeling shaft, a pre-composite passing roller and two dry film unreeling shafts which are sequentially arranged along a second direction, a dry film passing gap is formed between the two dry film unreeling shafts, and a tangent line of the outer diameter of the pre-composite passing roller and the midpoint of the dry film passing gap along the second direction are sequentially arranged along the first direction and are projected to coincide; the two isolation film unreeling components are sequentially arranged along the second direction, the output ends of the two isolation film unreeling components are arranged at the output end of the dry film unreeling shaft along the first direction, and the two isolation film unreeling components are symmetrically arranged along the straight line of the first direction about the midpoint of the dry film gap along the second direction; the device also comprises two adsorption plates, wherein the two adsorption plates are respectively and correspondingly arranged with the two isolating film unreeling assemblies and are respectively positioned between the corresponding isolating film unreeling assemblies and the hot-pressing gap; the hot-pressing roller assembly is used for carrying out a hot-pressing process on the material entering the hot-pressing gap; The adsorption plate comprises a plate body, wherein one plate surface of the plate body is arranged in parallel with a conveying path of a corresponding isolation film and is used for being attached to the isolation film, a negative pressure hole is formed in the surface of the plate body facing the isolation film, an adsorption cavity communicated with the negative pressure hole is formed in the plate body, a fan barrel is connected to the side surface of the plate body through a pipeline, and the input end of the fan barrel is communicated with the adsorption cavity; The hot-pressing roller assembly comprises two hot-pressing roller mechanisms which are sequentially arranged along a second direction, a hot-pressing gap is formed between the two hot-pressing roller mechanisms, and the hot-pressing roller mechanisms comprise composite roller pieces; The composite roller comprises a hot press roller body extending along a third direction, a containing cavity, a supporting roller body, a heating cavity, a heating pipe and a plurality of heat conducting fins, wherein the containing cavity is formed in the hot press roller body and used for containing heat conducting oil, the heating cavity is formed in the supporting roller body, the heating end of the heating pipe is arranged in the heating cavity, the plurality of heat conducting fins are circumferentially arrayed on the inner wall of the heating cavity, the other ends of the heat conducting fins are all abutted to the heating end of the heating pipe, an air inlet pipe and an air outlet pipe which are communicated with the heating cavity are fixedly connected to the end face of the supporting roller body, and the input end of the air inlet pipe is connected with the output end of the fan barrel.
2. 2. The dry electrode film roll-in composite equipment according to claim 1, wherein the surface of the plate body, which is away from the isolating film, is provided with an air inlet hole communicated with the adsorption cavity, the inner wall of the adsorption cavity is provided with an air duct, one end of the air duct shields the negative pressure hole, the diameter of an opening at one end of the air duct shields the negative pressure hole is gradually reduced from the extending direction to the diameter of an opening at the other end, and a fan is arranged in the fan cylinder.
3. 3. The dry electrode film roll lamination equipment of claim 1, wherein the hot pressing roller assembly comprises a pushing mechanism, the telescopic end of the pushing mechanism is connected with the fixed end of one hot pressing roller mechanism and used for pushing the other hot pressing roller mechanism to be close to the other hot pressing roller mechanism along the second direction, and the rotary ends of the two hot pressing roller mechanisms are rotated oppositely or reversely and used for carrying out a hot pressing process on materials in a hot pressing gap.
4. 4. The dry electrode film rolling and compounding device according to claim 3, wherein the hot-pressing roller mechanism further comprises a driving piece which is sequentially arranged with the compounding roller piece along a third direction, an output end of the driving piece is connected with one end of the compounding roller piece and is used for driving the compounding roller piece to rotate, and a fixed end of the driving piece and the other end of the compounding roller piece are fixedly connected with a telescopic end of the pushing mechanism.
5. 5. The dry electrode film roll lamination apparatus of claim 3, wherein one end of the heat press roll body is connected with the output end of the driving member, the other end of the heat press roll body is rotatably connected with the outer surface of the support roll body through a groove, and one end of the support roll body far away from the heat press roll body is connected with the telescopic end of the pushing mechanism.
6. 6. The dry electrode film rolling composite equipment according to claim 1, further comprising a rolling assembly, wherein the rolling assembly comprises a first rolling roller, a second rolling roller, a third rolling roller, a first passing roller, a second passing roller and two radiating pipes, the first rolling roller, the first passing roller, the second passing roller and the second rolling roller are sequentially arranged along a second direction, the third rolling roller is located below the second passing roller, the first passing roller and the second passing roller are respectively connected onto the two radiating pipes in a rotating mode, one end of each radiating pipe is fixedly connected with a radiating air pipe, the radiating air pipe coincides with the radiating pipes along the first direction, and a radiating opening facing the composite material is formed in the surface of each radiating air pipe.
7. 7. The dry electrode film roll-in compounding equipment according to claim 6, further comprising a machine body, wherein a two-position three-way electromagnetic valve is arranged in the machine body and is connected in series in a circuit of the driving piece, the two-position three-way electromagnetic valve is provided with a first outlet, a second outlet and an input port, the input port of the two-position three-way electromagnetic valve is connected with the output end of the fan cylinder through a pipeline, the first outlet is connected with the input end of the air inlet pipe through a pipeline, and the second outlet is communicated with the input end of the heat dissipation air pipe through a pipeline.
8. 8. A dry electrode film roll lamination method, characterized in that the dry electrode film roll lamination device according to any one of claims 1-7 is adopted, comprising: the current collector unreeling shaft is sleeved with a current collector, the current collector unreels the current collector by the current collector unreeling shaft, the current collector is led to a position where the current collector and the pre-compounding roller pass through, so that the current collector passes through a dry film gap between the two dry film unreeling shafts under the action of dead weight, and the dry film on the dry film unreeling shaft is attached to the current collector to obtain a pre-compounding film; The pre-composite film is provided with an isolating film unreeling component of the isolating film through a sleeve, the isolating film unreeling components unreels the isolating film, so that the two isolating films are respectively positioned on two sides of the pre-composite film, the adsorption plate is attached to the corresponding isolating film until the two isolating films and the pre-composite film are fed into a hot-pressing gap for hot pressing, and the composite material is obtained.

Description

Dry electrode film rolling compounding equipment and compounding method Technical Field The invention relates to the technical field of dry electrode film preparation, in particular to dry electrode film rolling and compounding equipment. Background In recent years, along with the wide application of lithium ion batteries in new energy automobiles, energy storage systems and consumer electronics fields, the electrode plate preparation technology gradually changes from the traditional wet coating to the dry film forming and rolling composite technology, and the dry electrode film has the advantages of environmental protection, low energy consumption, short process and the like because solvents and drying links are not needed, and becomes an important development direction in the lithium battery manufacturing field. However, in the existing dry electrode film rolling composite equipment, the problem that the surface coating precision of a dry electrode film on the surface of a current collector is poor due to insufficient centering precision and uneven tension of the dry electrode film and the current collector before fusion exists generally, and the film strip path design of the traditional equipment generally adopts a simple series unreeling and guide roller structure, so that the surface of a hot-pressing roller is inconvenient to clean due to the fact that the dry electrode film is adhered to the surface of the hot-pressing roller, a current collector adhered with the dry electrode film is protected by an isolating film, but the isolating film is influenced by air flow disturbance, electrostatic adsorption or tension fluctuation in the conveying process, drifting and wrinkling often occur, so that the joint surface distance between the hot-pressing rollers is difficult to control stably, when wrinkling occurs, shutdown is needed to adjust the isolating film, the composite material pressure distribution and the interface density are influenced, meanwhile, the stability of rolling composite operation is influenced, and the continuous rolling composite efficiency is influenced. Disclosure of Invention The invention aims to provide dry electrode film rolling compounding equipment and a dry electrode film rolling compounding method, which avoid that a protective isolation film is impacted by air flow disturbance or tension fluctuation to drop the dry electrode film attached to a current collector, and simultaneously avoid that the isolation film is wrinkled, effectively reduce defect rate and improve rolling compounding quality and stability of rolling compounding operation. In order to achieve the above purpose, the invention is realized by the following technical scheme: the dry electrode film rolling and compounding equipment comprises a pre-compounding unpowered unreeling component, a hot-pressing roller component with a hot-pressing gap and two isolating film unreeling components; The pre-composite unpowered unreeling component comprises a current collector unreeling shaft, a pre-composite passing roller and two dry film unreeling shafts which are sequentially arranged along a second direction, a dry film passing gap is formed between the two dry film unreeling shafts, and a tangent line of the outer diameter of the pre-composite passing roller and the midpoint of the dry film passing gap along the second direction are sequentially arranged along the first direction and are projected to coincide; the two isolation film unreeling components are sequentially arranged along the second direction, the output ends of the two isolation film unreeling components are arranged at the output end of the dry film unreeling shaft along the first direction, and the two isolation film unreeling components are symmetrically arranged along the straight line of the first direction about the midpoint of the dry film gap along the second direction; the device comprises a separating film unreeling assembly, a hot pressing gap, two adsorption plates, a negative pressure hole and a heat pressing plate, wherein the separating film unreeling assembly is used for separating films from the hot pressing gap; the hot pressing roller assembly is used for carrying out a hot pressing process on the material entering the hot pressing gap. Optionally, the adsorption plate includes the plate body, the plate body is with one of them face and the delivery path looks parallel arrangement of corresponding barrier film for laminate with the barrier film, the negative pressure hole is seted up at the surface of plate body towards the barrier film, the communicating adsorption cavity of negative pressure hole has been seted up in the inside of plate body, the side of plate body has a fan section of thick bamboo through the pipe connection, the input and the adsorption cavity of fan section of thick bamboo communicate with each other. Optionally, the surface that the plate body deviates from the barrier film has seted up with adsorb the communicati