CN117254131A - Winding equipment and winding method - Google Patents

Abstract

The present invention relates to a winding apparatus and a winding method. The winding apparatus includes: the winding device is provided with a winding needle positioned at a first station; the cutting device is arranged at the downstream of the first station and is used for cutting off the passing diaphragm and the first pole piece; the material belt separating device comprises a first separating piece and a second separating piece, the first separating piece is arranged on one side of the cutting device facing the first station, and the second separating piece can controllably move between a first position and a second position; when the second separating piece moves to the first position, a membrane penetrating gap for the membrane and the first pole piece to penetrate is formed between the second separating piece and the first separating piece, the first separating piece can fix the passing membrane, and the second separating piece can fix the passing first pole piece; and when the second separating piece moves to the second position, the first pole piece can be driven to leave the first station.

Description

Winding equipment and winding method

Technical Field

The invention relates to the technical field of battery manufacturing equipment, in particular to winding equipment and a winding method.

Background

The battery cell is an important component of a lithium ion battery, and is generally formed by winding four layers of material belts of a diaphragm, a cathode pole piece, a diaphragm and an anode pole piece. In order to improve the winding efficiency, a continuous winding technology of the cathode pole piece or the anode pole piece is often adopted, namely, each winding of one battery cell is performed, the anode pole piece or the cathode pole piece is not required to be inserted into a needle winding mechanism by utilizing a pole piece feeding device, and therefore the time for inserting the anode pole piece or the cathode pole piece is saved.

In the actual production process, the diaphragm is easy to damage, and when the diaphragm entering the needle winding mechanism is a disqualified section, the disqualified section of the diaphragm needs to be wound and removed through the needle winding mechanism. However, in the continuous winding technology of the cathode pole piece or the anode pole piece, the cathode pole piece or the anode pole piece and the diaphragm are always in a closed state (namely, the cathode pole piece or the anode pole piece and the diaphragm are closed and laminated), the diaphragm and the cathode pole piece or the anode pole piece can only be wound together, and the diaphragm cannot be wound independently, so that the waste of the cathode pole piece or the anode pole piece is caused.

Disclosure of Invention

Based on the above, it is necessary to provide a winding device and a winding method for improving the above defects, aiming at the problems that when the winding device in the prior art needs to wind up the unqualified section of the diaphragm, the diaphragm can only be wound up together with the cathode pole piece or the anode pole piece, and the diaphragm cannot be wound up alone, so that the cathode pole piece or the anode pole piece is wasted.

A winding apparatus having a first station, the winding apparatus comprising:

the winding device is provided with a winding needle positioned at the first station, and the winding needle can fix or release the diaphragm or the diaphragm and the first pole piece passing through the first station;

The cutting device is arranged at the downstream of the first station and is used for cutting off the passing diaphragm or the diaphragm and the first pole piece; a kind of electronic device with high-pressure air-conditioning system

A web separating device comprising a first separating member arranged on the side of the severing device facing the first station and a second separating member controllably movable between a first position and a second position;

when the second separating piece moves to the first position, a membrane penetrating gap for the membrane and the first pole piece to penetrate is formed between the second separating piece and the first separating piece, the first separating piece can fix the passing membrane, and the second separating piece can fix the passing first pole piece; and when the second separating piece moves to the second position, the first pole piece can be driven to leave the first station.

In one embodiment, the second separator member, when moved to the first position, clamps the routed diaphragm and first pole piece together with the first separator member.

In one embodiment, the first separator may controllably adsorb the affixed membrane.

In one embodiment, the second separator can controllably adsorb and fix the routed first pole piece.

In one embodiment, the winding apparatus further comprises a swing drive comprising a swing drive and a swing arm, the swing arm having a first end and a second end opposite each other; the first end is in driving connection with the swing driving piece, and the second end is connected with the second separating piece; the swing driving piece is used for driving the swing arm to swing around the first end so as to drive the second separating piece to swing between the first position and the second position.

In one embodiment, the winding apparatus further comprises a movement drive in driving connection with the second separator for driving the second separator between the first position and the second position.

In one embodiment, the winding needle can extend or retract from the first pole piece along the axial opposite passing diaphragm or the diaphragm, and the winding needle is provided with a slit;

when the winding needle positioned at the first station extends out along the axial direction of the winding needle, the diaphragm passing through the first station or the diaphragm and the first pole piece can enter the slit.

In one embodiment, the winding device further has a second station, and the winding device includes a turret, at least two winding pins mounted on the turret, and a guide roller between the first station and the second station; when the turret rotates, each winding needle can be driven to pass through the first station and the second station in sequence; the cutting device and the first separating piece are positioned between the first station and the second station;

When the winding needle positioned at the first station rotates to the second station along with the turret, the other winding needle rotates to the first station, and the diaphragm or the diaphragm and the first pole piece positioned between the first station and the second station are wound on the guide roller, so that the winding needle positioned at the first station can fix the diaphragm or the diaphragm and the first pole piece which are passed through.

In one embodiment, the number of the guide rollers is two, the two guide rollers are both rotatably connected to the turret around the axis of the guide rollers, and the number of the winding needles is two;

when the turret drives the two winding needles to alternately switch between the first station and the second station, the two guide rollers alternately supply the diaphragms passing through the first station and the second station or the diaphragms and the first pole piece to pass around.

In one embodiment, the three guide rollers are arranged, each of the three guide rollers is rotatably connected to the turret around the axis of the guide rollers, the winding needles are arranged in three, each guide roller is positioned between two adjacent winding needles, and the winding device is further provided with a third station;

In the rotating process of the turret, three winding needles can be driven to sequentially pass through the first station, the second station and the third station; when one of the winding needles is positioned at the first station, the other two winding needles are respectively positioned at the second station and the third station, and the diaphragm passing through the first station and the second station or the diaphragm and the first pole piece are wound on the corresponding guide roller.

A winding method using the winding apparatus described in any of the above embodiments, comprising a separator single-winding step comprising:

controlling the second separating piece to move to the first position towards the first separating piece at the downstream of the first station, fixing the passing first pole piece by using the second separating piece, and fixing the passing diaphragm by using the first separating piece;

cutting the diaphragm and the first pole piece downstream of the first separator and the second separator by using the cutting device;

controlling the second separating piece to move to the second position away from the first separating piece, so that the second separating piece drives the first pole piece to leave the first station;

And the winding needle positioned at the first station is used for fixing the diaphragm passing through the first station and winding the unqualified section of the diaphragm.

In one embodiment, the step of winding the reject section of the diaphragm after the winding needle located at the first station fixes the diaphragm passing through the first station further includes:

the winding needle positioned at the first station rotates to a second station along with the turret;

controlling the second separating piece to move close to the first separating piece until reaching the first position so as to drive the first pole piece and the diaphragm to be gathered together, and jointly clamping the first pole piece and the diaphragm which pass through by the first separating piece and the second separating piece;

severing a diaphragm downstream of the first and second separating members with the severing device;

the winding needle positioned at the first station is used for fixing the diaphragm and the first pole piece passing through the first station.

According to the winding equipment and the winding method, when the diaphragm reaching the first station is detected to be a disqualified section in actual operation, the second separating piece moves close to the first separating piece until reaching the first position, so that the diaphragm and the first pole piece pass through a film penetrating gap between the first separating piece and the second separating piece. And the first separator is controlled to fix the passed diaphragm, and the second separator is controlled to fix the first pole piece. Then, the cut-off device cuts off the passed diaphragm and the first pole piece. And then, the second separating piece moves away from the first separating piece from the first position until reaching the second position, and at the moment, the second separating piece drives the first pole piece to separate from the diaphragm and leave the first station. And then, the winding needle of the first station fixes the diaphragm and winds the diaphragm until all the unqualified sections of the diaphragm are wound on the winding needle. And finally, blanking the diaphragm unqualified section wound on the winding needle, and moving the second separating piece from the second position to the first position so as to drive the first pole piece and the diaphragm to be folded and laminated, so that the winding needle positioned at the first station can fix the diaphragm and the first pole piece and wind the diaphragm and form an electric core on the winding needle.

Therefore, the second separating piece moves between the first position and the second position, so that the first pole piece is driven to leave the first station to be separated from the diaphragm, or the first pole piece reaches the first station to be gathered and layered with the diaphragm, the unqualified section of the diaphragm is rolled and removed by the rolling needle, and the waste of the first pole piece is avoided.

Drawings

FIG. 1 is a schematic view of a winding apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the winding apparatus shown in FIG. 1 when the second separator drives the first pole piece to separate from the diaphragm;

FIG. 3 is a schematic view of the winding apparatus of FIG. 1 as the roll is wound up against a reject fraction of the separator;

FIG. 4 is a schematic view of the winding apparatus of FIG. 1 when the winding needle winds off a reject section of the separator and rotates to a second station;

FIG. 5 is a schematic view showing the structure of the winding apparatus shown in FIG. 1 when a cutting device cuts a separator;

FIG. 6 is a flowchart illustrating a winding step in a winding method according to an embodiment of the invention;

FIG. 7 is a flow chart of a single winding step of the separator in the winding method according to an embodiment of the invention.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, an embodiment of the present invention provides a winding apparatus including a winding device 20, a cutting device 30, and a tape separating device (not shown).

The winding device has a first station c1, and the winding means 20 has a winding needle 21 located at this first station c 1. The winding needle 21 is capable of fixing or releasing the diaphragm a1 and the first pole piece a2 routed through the first station c 1. A cutting device 30 is arranged downstream of the first station c1 for cutting the separator a1 or the separator a1 and the first pole piece a2 passing by. The web separating device comprises a first separating member 41 and a second separating member 42. The first separator 41 is arranged on the side of the cutting device 30 facing the first station c 1. The second separator member 42 is controllably movable between a first position (see fig. 1) adjacent the first separator member 41 and a second position (see fig. 2) remote from the first separator member 41.

When the second separating member 42 moves to the first position, a membrane-penetrating gap is formed between the second separating member 42 and the first separating member 41 for the membrane a1 and the first pole piece a2 to pass through. The first separator 41 can fix the diaphragm a1 passing through the through-film gap, and the second separator 42 can fix the first pole piece a2 passing through the through-film gap. When the second separating member 42 moves to the second position, the second separating member 42 can drive the first pole piece a2 to leave the first station c1, i.e. the first pole piece a2 passing through the first station c1 is separated from the diaphragm a1, so that the winding needle 21 can fix the diaphragm a1 and wind up the diaphragm a1 independently.

In the above winding apparatus, when it is detected in the actual operation that the separator a1 reaching the first station c1 is the reject section d, first, the second separator 42 moves close to the first separator 41 until reaching the first position, so that the separator a1 and the first pole piece a2 pass through the film passing gap between the first separator 41 and the second separator 42 (see fig. 1). And, the first separator 41 is controlled to fix the passing diaphragm a1, and the second separator 42 is controlled to fix the first pole piece a2. Then, the cut-off device 30 cuts off the separator a1 and the first pole piece a2 (see fig. 1) that are routed. Then, the second separating member 42 moves away from the first separating member 41 from the first position until reaching the second position, at which time the second separating member 42 drives the first pole piece a2 to separate from the diaphragm a1 and leave the first station c1 (see fig. 2). Then, the winding needle 21 of the first station c1 holds the diaphragm a1 and winds up the diaphragm a1 until the reject section d of the diaphragm a1 is completely wound up on the winding needle 21 (see fig. 3). Finally, the reject d of the diaphragm a1 wound on the winding needle 21 is fed, and the second separating piece 42 moves from the second position to the first position, so that the first pole piece a2 and the diaphragm a1 are driven to be folded and laminated, and the winding needle 21 at the first station c1 can fix the diaphragm a1 and the first pole piece a2 and wind the same, so that an electric core b is formed on the winding needle 21 (see fig. 4 and 5).

In this way, the second separating piece 42 is utilized to move between the first position and the second position, so that the first pole piece a2 is driven to leave the first station c1 to be separated from the diaphragm a1, or the first pole piece a2 reaches the first station c1 to be combined and stacked with the diaphragm a1, and further the winding needle 21 is used for independently winding and removing the unqualified section d of the diaphragm a1, and the waste of the first pole piece a2 is avoided.

Further, the winding apparatus further comprises a film combining device 10. The film combining device 10 is arranged at the upstream of the first station c1 and is used for combining the passing diaphragm a1 and the first pole piece a2, and the combined diaphragm a1 and the combined first pole piece a2 are stacked and conveyed to the downstream first station c 1.

In particular, in the embodiment, when the second separating member 42 moves to the first position, the second separating member 42 and the first separating member 41 clamp together the diaphragm a1 and the first pole piece a2 passing through the membrane-passing gap therebetween. In this way, before the cutting device 30 cuts the diaphragm a1 and the first pole piece a2, the first separating member 41 and the second separating member 42 are used to clamp the diaphragm a1 and the first pole piece a2, so that the cutting quality of the cutting device 30 on the diaphragm a1 and the first pole piece a2 is improved.

The first position may be a fixed position point, or may be a range of positions, as long as the diaphragm a1 and the first pole piece a2 can be clamped and fixed together with the first separator 41 when the second separator 42 reaches the first position, which is not limited herein. Similarly, the second position may be a fixed position point, or may be a range of positions, as long as the second separating member 42 can drive the first pole piece a2 to leave the first station c1 when reaching the second position, which is not limited herein.

In particular, in the embodiment, the first separator 41 may controllably adsorb the diaphragm a1 passing through the above-described through-film gap, thereby achieving fixation of the diaphragm a1. When the diaphragm a1 needs to be fixed, the first separating piece 41 is controlled to adsorb the diaphragm a1, so that the diaphragm a1 cannot move along with the first pole piece a2 when the first pole piece a2 is carried away by the second separating piece 42. When the fixation of the membrane a1 is not required, the first separator 41 is controlled to stop adsorbing the membrane a1. It should be noted that, the first separating member 41 may be a vacuum adsorption manner to adsorb the membrane a1, for example, the first separating member 41 is a vacuum adsorption plate. Of course, in other embodiments, the first separating member 41 may also fix the membrane a1 passing through the membrane penetration gap in other manners, such as electrostatic adsorption, etc., which is not limited herein.

In particular, in the embodiment, the second separating member 42 may controllably adsorb the first pole piece a2 passing through the above-mentioned film penetrating gap, so as to fix the first pole piece a2. When the first pole piece a2 needs to be fixed, the second separating piece 42 is controlled to absorb the first pole piece a2, so that the second separating piece 42 can take away the first pole piece a2 when moving from the first position to the second position. When the first pole piece a2 does not need to be fixed, the second separator 42 is controlled to stop adsorbing the first pole piece a2. It should be noted that, the second separating member 42 may be configured to adsorb the first pole piece a2 by vacuum adsorption, for example, the second separating member 42 is a vacuum adsorption plate. Of course, in other embodiments, the second separating element 42 may also fix the first pole piece a2 passing through the membrane penetration gap in other manners, such as electrostatic absorption, etc., which is not limited herein.

In some embodiments, the second separator 42 may be configured to switch between the first position and the second position in a swinging manner. Specifically, the winding apparatus further includes a swing driving device (not shown) including a swing driver (not shown) and a swing arm (not shown). The swing arm has a first end (not shown) and a second end (not shown) opposite each other. The first end is drivingly connected to the swing drive member and the second end is connected to the second separator member 42. The swing driving member is used for driving the swing arm to swing around the first end, so as to drive the second separating member 42 to swing between the first position and the second position. Alternatively, the swing drive may be a motor.

It should be noted that the second separating member 42 is not limited to the swing type. In other embodiments, the second separator 42 may also be movable (e.g., linearly movable) to switch between the first and second positions. In particular, the winding apparatus further comprises a movement driving device (not shown) in driving connection with the second separating member 42 for driving the second separating member 42 between the first position and the second position. Alternatively, the moving driving device may be a linear motor, an electric cylinder, an air cylinder, a ball screw pair linear module, or the like, which is not limited herein.

In particular to the embodiment, the winding needle 21 can be controllably extended or retracted along the axial direction of the winding needle 21 relative to the membrane a1 or the membrane a1 and the first pole piece a2, and the winding needle 21 is provided with a slit 210. When the winding needle 21 located at the first station c1 extends axially along the winding needle, the diaphragm a1 or the diaphragm a1 and the first pole piece a2 passing through the first station c1 can enter the slit 210, so that the winding needle 21 can clamp and fix the diaphragm a1 or the diaphragm a1 and the first pole piece a2 entering the slit 210, and further wind the unqualified section d of the diaphragm a1 or wind the diaphragm a1 and the first pole piece a2 to form the battery core b. Further, two inner clamping pins (not shown) are provided inside the winding pin 21, and the diaphragm a1 entering the slit 210 or the diaphragm a1 and the first pole piece a2 are clamped and fixed by the two inner clamping pins. The specific structure of the winding needle 21 can be a more mature technology, and is not limited herein.

In the embodiment of the present application, the winding device 20 includes a turret 25, at least two winding pins 21, and a guide roller 23. The at least two winding pins 21 are each mounted on a turret 25. The winding device also has a second station c2, and the turret 25, when rotated, can drive each winding needle 21 to pass through the first station c1 and the second station c2 in sequence. The first separating elements 41 of the cutting device 30 and the material belt separating device are located between the first station c1 and the second station c2, so that the cutting device 30 can cut off the diaphragm a1 and the first pole piece a2 passing between the first station c1 and the second station c2, the first separating elements 41 can adsorb and fix the diaphragm a1 passing between the first station c1 and the second station c2, and the second separating elements 42 can adsorb and fix the first pole piece a2 passing between the first station c1 and the second station c2.

When the winding needle 21 at the first station c1 rotates to the second station c2 with the turret 25, the other winding needle 21 rotates to the first station c1, and the separator a1 or the separator a1 and the first pole piece a2 between the first station c1 and the second station c2 are wound around the guide roller 23 so that the separator a1 or the separator a1 and the first pole piece a2 passing through the first station c1 are aligned with the slit 210 of the winding needle 21 at the first station c1. At this time, when the winding needle 21 located at the first station c1 extends in the axial direction of itself, the diaphragm a1 or the diaphragm a1 and the first pole piece a2 passing through the first station c1 can enter the slit 210 of the winding needle 21 and be clamped and fixed.

In this way, when the winding operation is performed, the separator a1 and the first pole piece a2 are gathered at the film joining device 10 and then conveyed to the winding needle 21 of the first station c1. The winding needle 21 at the first station c1 rotates to wind the separator a1 and the first pole piece a2 after being gathered to form a battery cell b.

When winding of one cell b is completed, the winding needle 21 located at the first station c1 stops rotating and rotates to the second station c2 following the turret 25, while the other winding needle 21 rotates to the first station c1 following the turret 25. At this time, the diaphragm a1 and the first pole piece a2 between the first and second work stations c1 and c2 are wound around the guide roller 23 due to the rotation of the turret 25. Under the guiding action of the guide roller 23 and the film combining device 10, the slit 210 of the winding needle 21 located at the first station c1 is aligned with the separator a1 and the first pole piece a2 passing through the first station c1. The winding needle 21 at the first station c1 is controlled to extend axially along the winding needle so that the diaphragm a1 and the first pole piece a2 passing through the first station c1 enter the slit 210 of the winding needle 21 to be clamped and fixed. Then, the cutting device 30 cuts the separator a1 and the first pole piece a2 passing between the first station c1 and the second station c2, so that the battery cell b on the winding needle 21 positioned at the second station c2 is separated from the upstream separator a1 and the first pole piece a2, and the battery cell b on the winding needle 21 is conveniently subjected to subsequent processing and blanking. In addition, the diaphragm a1 and the first pole piece a2 passing through the first station c1 are clamped and fixed by the winding needle 21 positioned at the first station c1, and at the moment, the winding needle 21 positioned at the first station c1 rotates automatically, so that the winding formation of the next cell b can be realized.

When the separator a1 input to the first station c1 is the reject section d, the winding needle 21 located at the first station c1 stops rotating and rotates to the second station c2 following the turret 25, while the other winding needle 21 rotates to the first station c1 following the turret 25 (see fig. 1). The second separator 42 is then moved towards the first separator 41 until the first position is reached. At this time, the diaphragm a1 and the first pole piece a2 pass through the membrane-passing gap between the first separator 41 and the second separator 42, and are thereby clamped by the first separator 41 and the second separator 42 (see fig. 1). Then, the cutting device 30 cuts the separator a1 and the first pole piece a2 passing between the first station c1 and the second station c2, so that the battery cell b on the winding needle 21 positioned at the second station c2 is separated from the upstream separator a1 and the first pole piece a2, so that the battery cell b on the winding needle 21 can be subjected to subsequent processing and blanking (see fig. 2). Then, the first separating member 41 adsorbs and fixes the diaphragm a1, the second separating member 42 adsorbs and fixes the first pole piece a2, and the second separating member 42 is controlled to move away from the first separating member 41 until reaching the second position (see fig. 2). At this time, the first pole piece a2 is separated from the diaphragm a1 under the driving of the second separating member 42, so that the material belt passing through the first station c1 only has the diaphragm a1 and no first pole piece a2. Then, the winding needle 21 located at the first station c1 holds the diaphragm a1 and winds the reject d of the diaphragm a1 around the winding needle 21 in turn until the reject d of the diaphragm a1 is wound around the winding needle 21 (see fig. 3).

After the reject d of the separator a1 is wound, the winding needle 21 located at the first station c1 stops rotating and rotates to the second station c2 following the turret 25, while the other winding needle 21 rotates to the first station c1 following the turret 25. The second separator 42 is then moved towards the first separator 41 until the first position is reached (see fig. 4). At this time, the second separating member 42 drives the first pole piece a2 to be folded and laminated with the diaphragm a1 again, so that the material belt passing through the first station c1 includes the diaphragm a1 and the first pole piece a2. Then, the winding needle 21 at the first station c1 extends axially to the self so that the diaphragm a1 and the first pole piece a2 passing through the first station c1 enter the slit 210 of the winding needle 21 to be clamped and fixed. The severing assembly severs the routed diaphragm a1 such that the reject d of the diaphragm a1 on the winding pin 21 at the second station c2 is separated from the diaphragm a1 to facilitate rejection of the reject d of the diaphragm a1 on the winding pin 21 (see fig. 5). At the same time, the winding needle 21 at the first station c1 winds the diaphragm a1 and the first pole piece a2 to form the cell b by itself.

The above-described operation steps are not limited to this, and are not limited to this as long as winding of the battery cell b and winding and removal of the defective segment d of the separator a1 can be achieved.

Referring to the embodiment shown in fig. 1 to 5, in some embodiments, the number of guide rollers 23 is two, and both guide rollers 23 are rotatably mounted on the turret 25 about their own axes. The number of winding needles 21 is also two. When the turret 25 drives the two winding needles 21 to alternately switch between the first station c1 and the second station c2, the two guide rollers 23 alternately supply the diaphragm a1 or the diaphragm a1 and the first pole piece a2 passing through the space between the first station c1 and the second station c2 to wind, so that under the combined action of the guide rollers 23 and the film combining device 10, the diaphragm a1 or the diaphragm a1 passing through the first station c1 is aligned with the first pole piece a2 to the slit 210 on the winding needle 21 of the first station c1, and then when the winding needle 21 of the first station c1 extends along the axial direction of the winding needle, the diaphragm a1 or the diaphragm a1 and the first pole piece a2 passing through the first station c1 can enter the slit 210 of the winding needle 21 to be clamped and fixed. That is, each time the turret 25 rotates 180 °, the winding needle 21 located at the first station c1 rotates to the second station c2 along with the turret 25, and at the same time, the winding needle 21 located at the second station c2 rotates to the first station c1 along with the turret 25, that is, the two winding needles 21 are driven to realize one position switching between the first station c1 and the second station c 2.

In this embodiment, the first station c1 may be a winding station, and the winding needle 21 located at the first station c1 can wind the separator a1 and the first pole piece a2 to form the battery core b when rotating, or can wind the reject section d of the separator a 1. The second station c2 may be a blanking station, and when the winding needle 21 reaches the second station c2, the battery cell b or the reject section d of the diaphragm a1 on the winding needle 21 may be blanked.

In other embodiments, the number of guide rollers 23 is three, and the three guide rollers 23 are each rotatably connected to the turret 25 about their own axis. The number of the winding needles 21 is three, the three winding needles 21 are arranged at intervals along the rotation direction of the turret 25, and each guide roller 23 is positioned between two adjacent winding needles 21. The winding device also has a third station (not shown) which, during rotation of the turret 25, is able to drive the three winding needles 21 sequentially through the first station c1, the second station c2 and the third station. When one winding needle 21 is located at the first station c1, the other two winding needles 21 are respectively located at the second station c2 and the third station, the diaphragm a1 passing through the space between the first station c1 and the second station c2 or the diaphragm a1 and the first pole piece a2 are wound on the corresponding guide roller 23, so that under the combined action of the guide roller 23 and the film combining device 10, the diaphragm a1 passing through the first station c1 or the diaphragm a1 and the first pole piece a2 are aligned with the slit 210 on the winding needle 21 located at the first station c1, and further, when the winding needle 21 located at the first station c1 extends out in the axial direction, the diaphragm a1 passing through the first station c1 or the diaphragm a1 and the first pole piece a2 can enter the slit 210 of the winding needle 21 to be clamped and fixed. That is, every 120 ° of rotation of the turret 25, the winding needle 21 located at the first station c1 rotates to the second station c2 following the turret 25, while the winding needle 21 located at the second station c2 rotates to the third station following the turret 25, and the winding needle 21 located at the third station rotates to the first station c1 following the turret 25.

In this embodiment, the first station c1 may be a winding station, and the winding needle 21 located at the first station c1 can wind the separator a1 and the first pole piece a2 to form the battery core b when rotating, or can wind the reject section d of the separator a 1. The second station c2 may be a final rubberizing station, and the winding needle 21 located at the second station c2 can rotate to wind the tail ends of the diaphragm a1 and the first pole piece a2, and paste the tail end of the diaphragm a1 onto the battery cell b through the adhesive tape, so as to avoid loosening of the battery cell b. The third station may be a blanking station, and when the winding needle 21 reaches the third station, the battery cell b or the reject section d of the diaphragm a1 on the winding needle 21 may be blanked.

In the embodiment of the application, the diaphragm a1 is arranged into two layers, the two layers of the diaphragm a1 and the first pole piece a2 are gathered and layered at the film combining device 10, and then the two layers of the diaphragm a1 and the first pole piece a2 are conveyed to the winding needle 21 of the first station c1 for winding. The two layers of diaphragms a1 are positioned on the same side of the first pole piece a 2. It will be appreciated that, in order to enable the first separator 41 to adsorb and fix the two-layer membrane a1 and the second separator 42 to adsorb and fix the first pole piece a2, when the two-layer membrane a1 and the first pole piece a2 pass through the membrane-penetrating gap between the first separator 41 and the second separator 42, the two-layer membrane a1 is located on the side of the first pole piece a2 facing the first separator 41, and the first pole piece a2 is located on the side of the two-layer membrane a1 facing the second separator 42.

Since the two separator layers a1 are attracted to each other by static electricity, when the first separator 41 attracts the separator layers a1, both separator layers a1 are attracted to and fixed to the first separator 41. Of course, in order to make the first separating member 41 more firmly adsorb and fix the two layers of diaphragms a1, the cutting device 30 may cut the two layers of diaphragms a1 and the first pole piece a2 in a hot cutting manner, and the cut ends of the two layers of diaphragms a1 may be combined together due to hot melting, so as to ensure that the two layers of diaphragms a1 can be more firmly adsorbed and fixed on the first separating member 41 when the first separating member 41 adsorbs the diaphragms a 1.

It should be noted that a second pole piece (not shown) is further included between the two layers of the separator a1 in the wound battery cell b, and the second pole piece has a polarity opposite to that of the first pole piece a 2. That is, when the second electrode sheet is a cathode electrode sheet, the first electrode sheet a2 is an anode electrode sheet. When the second pole piece is an anode pole piece, the first pole piece a2 is a cathode pole piece.

Since the winding device in the application adopts a winding operation mode that the first pole piece a2 is continuously wound and the second pole piece is discontinuously wound. That is, when one cell b is about to be wound, the second pole piece is cut off (at this time, the first pole piece a2 is not cut off) by the upstream of the laminating apparatus 10, and the winding needle 21 located at the first station c1 continues to wind until the tail end of the second pole piece is wound onto the winding needle 21 and is covered by the two-layer separator a 1. After winding one cell b and before winding the next cell b, the first pole piece a2 does not need to perform an inserting process, but the second pole piece needs to perform an inserting process, i.e. the end of the second pole piece is inserted into the film combining device 10, and then reaches the first station c1 along with the diaphragm a1 and is wound on the winding needle 21 positioned at the first station c 1.

It should be noted that, the cutting and inserting of the second pole piece may be performed by using a relatively mature cutting device and an inserting device, which are not limited herein.

Based on the winding equipment, the application also provides a winding method using the winding equipment. The winding method includes a winding step S10 and a separator single winding step S20. In the winding step S10, the separator a1, the first pole piece a2, and the second pole piece are wound by the winding needle 21 located at the first station c1, so that the battery cell b is formed by winding the winding needle 21. It will be appreciated that the separator a1 is provided in two layers, the two layers of separator a1 are located on the same side of the first pole piece a2, and the second pole piece is located between the two layers of separator a1, that is, four layers of material tapes are laminated in the order of the separator a1, the second pole piece, the separator a1 and the first pole piece and wound onto the winding needle 21 located at the first station c1 to form the battery cell b.

In the process of performing the winding step S10, the winding step S10 is stopped when the diaphragm a1 conveyed to the first station c1 is detected as the reject section d, and the diaphragm single winding step S20 is performed to individually wind up the reject section d of the diaphragm a1 conveyed to the first station c 1.

Referring to fig. 6, in an embodiment, the winding step S10 includes the following steps:

S11, the end part of the second pole piece is sent to the film combining device 10, and then the diaphragm a1 is followed to reach the winding needle 21 positioned at the first station c1. At this time, the two layers of the diaphragm a1, the first pole piece a2 and the second pole piece are conveyed to the winding needle 21 of the first station c1 after being gathered by the film doubling device 10.

And S12, the winding needle 21 positioned at the first station c1 rotates automatically so as to wind the diaphragm a1, the first pole piece a2 and the second pole piece onto the winding needle 21 and form the battery cell b.

S13, when the winding of the battery cell b on the winding needle 21 at the first station c1 is completed, cutting off the second pole piece at the upstream of the film combining device 10. The winding needle 21 located at the first station c1 stops rotating and rotates to the second station c2 following the turret 25, while the other winding needle 21 rotates to the first station c1 following the turret 25. At this time, the diaphragm a1 and the first pole piece a2 between the first and second work stations c1 and c2 are wound around the guide roller 23 due to the rotation of the turret 25. Under the guiding action of the guide roller 23 and the film combining device 10, the slit 210 on the winding needle 21 of the first station c1 is aligned with the diaphragm a1 and the first pole piece a2 passing through the first station c1.

S14, the winding needle 21 positioned at the first station c1 extends towards the passing diaphragm a1 and the first pole piece a2, so that the diaphragm a1 and the first pole piece a2 enter the slit 210 of the winding needle 21 positioned at the first station c1, and the winding needle 21 clamps the diaphragm a1 and the first pole piece a2.

S15, the cutting device 30 cuts off the diaphragm a1 and the first pole piece a2 between the first station c1 and the second station c2, so that the battery cell b on the winding needle 21 positioned at the second station c2 is separated from the upstream diaphragm a1 and the first pole piece a2, and the battery cell b on the winding needle 21 is subjected to subsequent treatment and blanking. It should be noted that the electrical core b located on the winding needle 21 of the second station c2 may be fed at the second station c2, or the second station c2 may be subjected to ending and rubberizing, and then the third station c3 may be subjected to feeding, which is not limited herein.

S16, circularly executing the S11 to S15 so as to realize mass production of the battery cells b.

Referring to fig. 7, in an embodiment, the separator single-winding step S20 includes the following steps:

s21, downstream of the first station c1, controlling the second separating piece 42 to move towards the first separating piece 41 to a first position, fixing the passing first pole piece a2 by the second separating piece 42, and fixing the passing diaphragm a1 by the first separating piece 41. Specifically, the diaphragm a1 is fixed by adsorption by the first separator 41, and the first pole piece a2 is fixed by adsorption by the second separator 42. Further, when the second separator 42 moves to the first position, the first separator 41 clamps the diaphragm a1 and the first pole piece a2 together with the second separator 42.

S22, the diaphragm a1 and the first pole piece a2 are cut off downstream of the first separating piece 41 and the second separating piece 42 by utilizing the cutting device 30, so that the cut end of the diaphragm a1 is adsorbed and fixed by the first separating piece 41, and the cut end of the first pole piece a2 is adsorbed and fixed by the second separating piece 42.

S23, controlling the second separating member 42 to move away from the first separating member 41 to a second position, so that the second separating member 42 drives the first pole piece a2 to separate from the diaphragm a1 and leave the first station c1, namely, the material belt passing through the first station c1 only has the diaphragm a1.

S24, the winding needle 21 positioned at the first station c1 is used for fixing the diaphragm a1 passing through the first station c1 and winding the disqualified section d of the diaphragm a1. Specifically, first, the winding needle 21 located at the first station c1 is protruded toward the diaphragm a1 passing through the first station c1, so that the diaphragm a1 is entered into the slit 210 of the winding needle 21, and the winding needle 21 is thereby caused to clamp the diaphragm a1. Then, the winding needle 21 located at the first station c1 rotates, thereby realizing the individual winding of the reject d of the separator a1.

S25, the winding needle 21 positioned at the first station c1 rotates to the second station c2 along with the turret 25, so that the disqualified section d of the diaphragm a1 wound on the winding needle 21 also leaves the first station c1 along with the winding needle 21, and the disqualified section d of the diaphragm a1 on the winding needle 21 is fed in and fed out conveniently. At the same time, the other winding pin 21 on the turret 25 rotates with the turret 25 to the first station c1. Note that the reject d of the separator a1 on the winding needle 21 may be fed at the second station c2, or the reject d of the separator a1 on the winding needle 21 may be fed at the third station c3, which is not limited herein.

S26, controlling the second separating piece 42 to move close to the first separating piece 42 until reaching a first position so as to drive the first pole piece a2 and the diaphragm a1 to be gathered, and jointly clamping the first pole piece a2 and the diaphragm a1 by the first separating piece 41 and the second separating piece 42. At this time, the material belt passing through the first station c1 is a diaphragm a1 and a first pole piece a2.

S27, the diaphragm a1 is cut downstream of the first separating member 41 and the second separating member 42 by the cutting device 30. At this time, the cut end of the diaphragm a1 and the cut end of the first pole piece a2 are clamped by the first separator 41 and the second separator 42.

S28, the winding needle 21 positioned at the first station c2 is used for fixing the diaphragm a1 and the first pole piece a2 passing through the first station c 1. Specifically, the winding needle 21 located at the first station c1 protrudes toward the diaphragm a1 and the first pole piece a2 passing through the first station c1, so that the diaphragm a1 and the first pole piece a2 enter into the slit 210 of the winding needle 21, and the winding needle 21 clamps the diaphragm a1 and the first pole piece a2. At this time, the winding step S10 described above may be performed again to wind the molded cell b.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (11)

1. A winding apparatus having a first station, the winding apparatus comprising:

the winding device is provided with a winding needle positioned at the first station, and the winding needle can fix or release the diaphragm or the diaphragm and the first pole piece passing through the first station;

the cutting device is arranged at the downstream of the first station and is used for cutting off the passing diaphragm or the diaphragm and the first pole piece; a kind of electronic device with high-pressure air-conditioning system

A web separating device comprising a first separating member arranged on the side of the severing device facing the first station and a second separating member controllably movable between a first position and a second position;

when the second separating piece moves to the first position, a membrane penetrating gap for the membrane and the first pole piece to penetrate is formed between the second separating piece and the first separating piece, the first separating piece can fix the membrane passing by, and the second separating piece can fix the first pole piece passing by; and when the second separating piece moves to the second position, the first pole piece can be driven to leave the first station.

2. The winding apparatus of claim 1, wherein the second separator, when moved to the first position, clamps the routed diaphragm and first pole piece together with the first separator.

3. The winding device according to claim 1, characterized in that the first separator is controllably suction-fixed to the passing diaphragm.

4. The winding apparatus of claim 1 wherein the second separator controllably adsorbs the first pole piece in the stationary pass.

5. The winding apparatus according to claim 1, further comprising a swing drive including a swing drive and a swing arm, the swing arm having a first end and a second end opposite each other; the first end is in driving connection with the swing driving member, and the second end is connected with the second separating member 42; the swing driving piece is used for driving the swing arm to swing around the first end so as to drive the second separating piece to swing between the first position and the second position.

6. The winding apparatus of claim 1, further comprising a movement drive drivingly connected to the second separator to drive movement of the second separator between the first and second positions.

7. Winding device according to any of claims 1 to 6, characterized in that the winding needle is capable of extending or retracting the diaphragm or the diaphragm and the first pole piece, which are axially opposite to each other, and in that the winding needle has a slit;

when the winding needle positioned at the first station extends out along the axial direction of the winding needle, the diaphragm passing through the first station or the diaphragm and the first pole piece can enter the slit.

8. The winding device according to any one of claims 1 to 6, characterized in that it further has a second station, said winding means comprising a turret, at least two of said winding needles mounted on said turret and a guide roller located between said first station and said second station; when the turret rotates, each winding needle can be driven to pass through the first station and the second station in sequence; the cutting device and the first separating piece are positioned between the first station and the second station;

when the winding needle positioned at the first station rotates to the second station along with the turret, the other winding needle rotates to the first station, and the diaphragm or the diaphragm and the first pole piece positioned between the first station and the second station are wound on the guide roller, so that the winding needle positioned at the first station can fix the diaphragm or the diaphragm and the first pole piece which are passed through.

9. The winding device according to claim 8, wherein there are two guide rollers, both of which are rotatably connected to the turret about their own axes, and the winding needle is provided in two; when the turret drives the two winding needles to alternately switch between the first station and the second station, the two guide rollers alternately supply a diaphragm passing through the space between the first station and the second station or the diaphragm and the first pole piece to pass around; or,

the three guide rollers are rotatably connected to the turret around the axis of the guide rollers, the three winding needles are arranged, each guide roller is positioned between two adjacent winding needles, and the winding device is further provided with a third station; in the rotating process of the turret, three winding needles can be driven to sequentially pass through the first station, the second station and the third station; when one of the winding needles is positioned at the first station, the other two winding needles are respectively positioned at the second station and the third station, and the diaphragm passing through the first station and the second station or the diaphragm and the first pole piece are wound on the corresponding guide roller.

10. A winding method using the winding device according to any one of claims 1 to 9, comprising a separator single-winding step comprising:

controlling the second separating piece to move to the first position towards the first separating piece at the downstream of the first station, fixing the passing first pole piece by using the second separating piece, and fixing the passing diaphragm by using the first separating piece;

cutting the diaphragm and the first pole piece downstream of the first separator and the second separator by using the cutting device;

controlling the second separating piece to move to the second position away from the first separating piece, so that the second separating piece drives the first pole piece to leave the first station;

and the winding needle positioned at the first station is used for fixing the diaphragm passing through the first station and winding the unqualified section of the diaphragm.

11. The method of winding of claim 10, wherein the step of holding the separator passing through the first station by the winding pin at the first station and winding up the reject fraction of the separator further comprises:

the winding needle positioned at the first station rotates to a second station along with the turret;

Controlling the second separating piece to move close to the first separating piece until reaching the first position so as to drive the first pole piece and the diaphragm to be gathered together, and jointly clamping the first pole piece and the diaphragm which pass through by the first separating piece and the second separating piece;

severing a diaphragm downstream of the first and second separating members with the severing device;

the winding needle positioned at the first station is used for fixing the diaphragm and the first pole piece passing through the first station.