CN212277290U

CN212277290U - Single-layer winding device and winding equipment

Info

Publication number: CN212277290U
Application number: CN202021118975.1U
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuxi Lead Intelligent Equipment Co Ltd
Current assignee: Wuxi Lead Intelligent Equipment Co Ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-01-01
Anticipated expiration: 2030-06-16

Abstract

The utility model relates to an individual layer take-up device, including first detection piece, first winding mechanism and actuating mechanism. The first detection piece is used for detecting the position of the defective material belt; the first winding mechanism is arranged at the downstream side of the first detection piece and is used for winding the defective material belt; the driving mechanism is in transmission connection with the first winding mechanism and is electrically connected with the first detection piece, and the driving mechanism is used for driving the first winding mechanism to move in the width direction of the material belt according to the position information detected by the first detection piece. Through setting up foretell individual layer take-up device, avoid taking place the skew through the material area after individual layer take-up device convolutes, avoid the skew increase between this material area and other material areas promptly, ensure that the alignment degree between the material area is higher, improve the quality of the electric core of follow-up coiling formation. The utility model discloses still relate to a coiling equipment.

Description

Single-layer winding device and winding equipment

Technical Field

The utility model relates to a battery production facility technical field especially relates to an individual layer take-up device and winding apparatus.

Background

In the lithium battery manufacturing industry, the lithium battery winding equipment winds a pole piece and a diaphragm together to form a battery core, and then a lithium battery finished product is manufactured after a series of processes such as hot pressing, liquid injection and the like. The cell winding process is a core process for manufacturing the lithium battery and directly influences the performance of the lithium battery.

The cell winding is generally to sequentially overlap and wind a positive electrode sheet, a separator, a negative electrode sheet and a separator in a material strip shape, and when a defect occurs in a certain positive electrode sheet or negative electrode sheet, the positive electrode sheet or negative electrode sheet with the defect needs to be separately wound, and is cut after the winding. However, in the conventional winding device, in the process of individually winding the defective positive electrode plate or negative electrode plate, the corresponding electrode plate is easily deviated, so that the deviation between the individually wound material strip and other material strips is increased after the material strip is cut, that is, the alignment degree between the material strips is poor, and thus the quality of the wound battery cell is low.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a single-layer winding apparatus and a winding device which can avoid the deviation of the pole piece with the defect during the winding process and improve the quality of the battery cell formed by the subsequent winding, aiming at the problem that the quality of the battery cell formed by the subsequent winding is low after the existing pole piece with the defect is singly wound and cut.

A single-ply winding apparatus comprising:

a first detecting member for detecting a position of the tape with the defect;

a first winding mechanism disposed on a downstream side of the first detecting member, for winding the defective tape; and

and the driving mechanism is in transmission connection with the first winding mechanism and is electrically connected with the first detection piece, and the driving mechanism is used for driving the first winding mechanism to move in the width direction of the material belt according to the position information detected by the first detection piece.

Through setting up foretell individual layer take-up device, individual layer take-up device corresponds a pole piece material area setting, when there is the defect in a certain pole piece on the pole piece material area, individual layer take-up device starts to work, convolute the pole piece of defect, the position in this material area of first detection piece detectable, and actuating mechanism detects the position control actuating mechanism action in material area according to first detection piece, thereby adjust the position of first winding mechanism, and actuating mechanism is the removal in the broad width direction in material area of first winding mechanism of drive, consequently at the in-process in first winding mechanism coiling material area, the position in accessible actuating mechanism adjustment material area, the realization is handled the rectifying of material area. So, avoid taking place the skew through the material area after single-deck take-up device convolutes, avoid the skew increase between this material area and other material areas promptly, ensure that the alignment degree between the material area is higher, improve the quality of the electric core of follow-up coiling formation.

In one embodiment, the driving mechanism includes a servo motor and a transmission assembly, the servo motor is electrically connected to the first detecting member, the transmission assembly is connected to a driving end of the servo motor, and the first winding mechanism is connected to the transmission assembly.

In one embodiment, the single-layer winding device further comprises a second detection member, which is arranged on the upstream side of the first detection member and is used for detecting the position of the defect on the material belt with the defect;

the driving mechanism is electrically connected with the second detection piece and used for driving the first winding mechanism according to the position information detected by the second detection piece.

In one embodiment, the first winding mechanism is electrically connected to the second detecting member, and the first winding mechanism winds the defective tape according to the position information detected by the second detecting member.

In one embodiment, the second detecting member is a color sensor.

In one embodiment, the single-layer winding device further comprises a controller, the controller is electrically connected with the first detection member and the driving mechanism respectively, and the controller controls the driving mechanism to drive the first winding mechanism according to the position information detected by the first detection member.

In one embodiment, the single-layer winding device further comprises a cutting mechanism, wherein the cutting mechanism is arranged between the first winding mechanism and the first detection piece and used for cutting the material belt.

In one embodiment, the first detection member is a position sensor.

A winding apparatus comprising two single-layer winding devices as described above, the winding apparatus being configured to wind a first pole piece, a first separator, a second pole piece, and a second separator in a stack;

the two single-layer winding devices are respectively arranged corresponding to the first pole piece and the second pole piece and are used for winding the defective parts of the first pole piece and the second pole piece and separating the defective parts of the first pole piece and the second pole piece from the rest parts.

In one embodiment, the winding apparatus further includes a multilayer winding device disposed on a downstream side of the single-layer winding device, for winding the first pole piece, the first separator, the second pole piece, and the second separator in a stack.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a single-layer winding device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a defective material tape according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a defective tape according to another embodiment of the present invention;

fig. 4 is a schematic view illustrating a second winding mechanism winding a plurality of layers of material strips according to an embodiment of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying 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, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to 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", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" 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 as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1, a single-layer winding device 10 according to an embodiment of the present invention includes a first detecting member 12, a first winding mechanism 14, and a driving mechanism 16.

The first detector 12 is used to detect the location of the tape 200 with the defect 202.

The first winding mechanism 14 is disposed on the downstream side of the first detecting member 12, and is used for winding the tape 200 with the defect 202.

The driving mechanism 16 is in transmission connection with the first winding mechanism 14 and is electrically connected to the first detecting member 12, and the driving mechanism 16 is configured to drive the first winding mechanism 14 to move in the width direction of the tape 200 according to the position information detected by the first detecting member 12, so as to adjust the position of the first winding mechanism 14.

It should be noted that the single-layer winding device 10 is only used for winding the material tape 200 with the defect 202, such as a pole piece with the defect 202, the defect 202 is located on the pole piece, and the single-layer winding device 10 winds the material tape 200 separately before the material tape 200 and other material tapes are wound together to form a cell.

By arranging the single-layer winding device 10, the single-layer winding device 10 is arranged corresponding to a pole piece material strip 200, when a pole piece on the pole piece material strip 200 has a defect 202, the single-layer winding device is started to work to wind the pole piece with the defect, the first detection piece 12 can detect the position of the material strip 200, the driving mechanism 16 controls the driving mechanism 16 to act according to the position of the first detection piece 12 for detecting the material strip 200, so as to adjust the position of the first winding mechanism 14, and the driving mechanism 16 drives the first winding mechanism 14 to move in the width direction of the material strip 200, so that in the process of winding the material strip 200 by the first winding mechanism 14, the position of the material strip 200 can be adjusted by the driving mechanism 16, and the deviation rectification processing of the material strip 200 is realized. Therefore, the material belt 200 wound by the single-layer winding device 10 is prevented from deviating, that is, the deviation between the material belt 200 and other material belts is prevented from increasing, the high alignment degree between the material belts 200 is ensured, and the quality of the battery cell formed by subsequent winding is improved.

It should also be explained that the strip of material 200 is typically transported between different mechanisms, and the strip of material 200 is prone to shifting during transport from one mechanism to another, typically because the mechanisms typically vibrate during operation of the overall apparatus, and the strip of material 200 transported between the two mechanisms is prone to shifting during vibration.

Taking the first winding mechanism 14 in the above embodiment as an example, the tape 200 is fed from the previous mechanism, and if the position of the first winding mechanism 14 cannot be adjusted, the tape 200 is shifted when being fed from the previous mechanism, and the position on the first winding mechanism 14 is shifted, so that the position of the tape 200 fed by the subsequent mechanism is shifted, thereby affecting the winding of the subsequent cells.

By adopting the single-layer winding device 10, the first detection member 12 can detect the position information of the tape 200 conveyed from the previous mechanism, and when the tape 200 has deviated, the driving mechanism 16 drives the first winding mechanism 14 to move in the width direction of the tape 200 according to the position information detected by the first detection member 12, so as to drive the tape 200 to move until the position information of the tape 200 detected by the first detection member 12 meets the requirement.

In some embodiments, the first detecting member 12 is a deviation-correcting sensor, and may be a position sensor or a photoelectric sensor, and can obtain the position information of the tape 200 with the defect 202, and determine whether the tape 200 is deviated by comparing the position information with the preset position information of the tape 200.

In some embodiments, the driving mechanism 16 includes a servo motor 162 and a transmission assembly 164, the servo motor 162 is electrically connected to the first detecting member 12, the transmission assembly 164 is connected to a driving end of the servo motor 162, and the first winding mechanism 14 is connected to the transmission assembly 164 to drive the first winding mechanism 14 to move.

Specifically, the transmission assembly 164 is a lead screw module for converting the rotational output of the servo motor 162 into a linear output. So, through adopting servo motor 162 drive first winding mechanism 14 to remove in the broad width direction of material area 200, the position of the first winding mechanism 14 of adjustment that can be more accurate to ensure the precision that material area 200 carried, improve the alignment degree of each material area 200 when electric core is convoluteed, finally improve the quality of electric core.

In some embodiments, the single-layer winding device 10 further includes a second detecting member disposed on the upstream side of the first detecting member 12 for detecting the position of the pole piece with the defect 202 on the tape 200.

Further, the driving mechanism 16 is electrically connected to the second detecting member for driving the first winding mechanism 14 based on the position information detected by the second detecting member.

In some embodiments, the single-layer winding device 10 further includes a third detecting member disposed on an upstream side of the second detecting member for detecting defects on the tape 200. It is understood that the third detecting element is a component for detecting the defect 202, and is a conventional component, and will not be described herein.

With reference to the above embodiment, the workflow of the single-layer winding apparatus 10 is as follows: initially, the first winding mechanism 14 is located at a position avoiding position, that is, a position where the tape 200 is conveyed is not affected, when the third detecting element detects that the tape 200 has the defect 202, and the second detecting element can be matched to obtain a position of a pole piece with the defect 202, then the driving mechanism 16 obtains the position information, pushes the first winding mechanism 14 to move towards the corresponding tape 200, moves to the corresponding position, inserts the tape 200 into the first winding mechanism 14, then starts to wind the pole piece with the defect 202 of the tape 200, the first detecting element 12 detects the position information of the tape 200 in the winding process, and the driving mechanism 16 adjusts the position of the first winding mechanism 14 according to the position information detected by the first detecting element 12, so as to perform deviation rectification processing on the tape 200 in the winding process.

It should be understood that the position information detected by the first detecting member 12 is the position information of the tape 200, and the position information detected by the second detecting member is the position information of the defect 202 on the tape 200, specifically the position information of the pole piece with the defect 202.

In practical applications, the first winding mechanism 14 is electrically connected to the second detecting member, and is configured to wind the material tape 200 with the defect 202 according to the position information detected by the second detecting member, that is, after detecting the position of the pole piece with the defect 202 on the material tape 200, the first winding mechanism 14 is activated according to the position information.

Referring to fig. 2, in some embodiments, the second detecting element is a color sensor. It should be noted that, during the formation of pole piece tape 200, the apparatus forming pole piece tape 200 can detect the defect 202 on the pole piece, but cannot process the pole piece with the defect 202, and only can wind the whole pole piece tape 200 together. However, after detecting the defect 202 on the pole piece, the apparatus can mark the pole piece with a color mark 203 at a certain fixed position, the second detecting element is a color sensor capable of detecting the color, and after detecting the position of the mark 203, because the position of the mark 203 on each pole piece is fixed, the position of the tail of the pole piece can be determined, and the single-layer winding device 10 can be ensured to wind the pole piece independently.

Referring to fig. 3, in other embodiments, the second detecting element may also be a photoelectric sensor. The position detection of the pole pieces with the defect 202 is realized by the tabs 204 on the pole pieces, that is, a notch is formed on the tab 204 at the end of each pole piece, and the position of the notch can be detected by the second detecting element, and the position of the tab at the end of the pole piece is fixed, which has the same function as the above-mentioned mark 203, so that the single-layer winding device 10 can be ensured to wind the pole piece independently.

With particular reference to fig. 3, a notch is provided in the tab 204 attached to the end of the pole piece and the second detector element can detect the notch to determine the positional information of the pole piece with the defect 202. Of course, the tab 204 connected to the head end of the pole piece may be notched to determine the position information of the pole piece.

It should be noted that, when the second detecting element is a color sensor, the single-layer winding device 10 does not need to additionally provide a third detecting element, and when the second detecting element detects a color mark, it indicates that a certain pole piece on the tape 200 has a defect 202, and can also obtain the position information of the pole piece.

As will be understood in conjunction with the above-mentioned embodiments, the second detecting element detects a defect 202 on a certain pole piece, determines the position of the pole piece on the corresponding material tape 200, then determines the time for conveying the pole piece to the first winding mechanism 14 according to the conveying speed of the material tape 200, and the driving mechanism 16 is actuated to push the first winding mechanism 14 out of the initial position immediately before the pole piece is input to the first winding mechanism 14, and then the pole piece is wound separately.

In some embodiments, the single-layer winding device 10 further includes a cutting mechanism disposed between the first winding mechanism 14 and the first detecting member 12 for cutting the material tape 200.

It will be appreciated that the first winding mechanism 14 is used to wind the pole piece with the defect 202, and after the pole piece is wound separately, the subsequent tape 200 needs to be wound in layers with other tapes to form a cell, and the tape 200 needs to be cut off in order to ensure that the first winding mechanism 14 only winds the pole piece with the defect 202.

With the above embodiment, the work flow is as follows: after the second detecting member detects the mark, it can acquire the position information of the pole piece with the defect 202, and determine the position of the pole piece on the corresponding material belt 200, and then determine the time for conveying the pole piece to the first winding mechanism 14 according to the conveying speed of the material belt 200, and the driving mechanism 16 is actuated when the pole piece is about to be input to the first winding mechanism 14, so as to push the first winding mechanism 14 out of the initial position, and then the pole piece is wound separately. Meanwhile, in combination with the winding speed, the time for the cutting position 205 of the material tape 200 to pass through the cutting mechanism can be determined, so that the cutting mechanism can accurately cut the material tape 200, and finally, the single-layer winding device 10 can independently wind the pole pieces with the defects 202.

It should be noted that the cutting position 205 of the material tape 200, i.e. the position between the pole piece with the defect 202 and the next pole piece, may be set according to actual conditions, and after the cutting position is set, the cutting position is determined by the position where the second detecting element detects the mark 203 during the winding process of the single-layer winding device 10, so as to ensure that the first winding mechanism 14 only winds the pole piece with the defect 202, and does not affect the winding of the subsequent normal pole piece of the material tape 200.

In some embodiments, the single-layer winding apparatus 10 further includes a controller electrically connected to the first detecting member 12 and the driving mechanism 16, respectively, for controlling the driving mechanism 16 to drive the first winding mechanism 14 according to the position information detected by the first detecting member 12, so as to adjust the position of the first winding mechanism 14.

The controller is internally provided with a preset position of the material belt 200 at the detection position of the first detection part 12 in advance, the controller acquires the position information detected by the first detection part 12, then the detected position information is compared with the preset position, if the position information deviates, the controller controls the driving mechanism 16 to act, and the position of the first winding mechanism 14 is adjusted until the detected position information meets the requirement, namely, is consistent with the preset position.

Further, the controller is electrically connected to the second detecting element and the third detecting element, and is configured to control the action of the driving mechanism 16 according to the position information detected by the third detecting element in cooperation with the second detecting element, that is, the third detecting element detects the existence of the defect 202, and then the second detecting element can detect the position information of the pole piece where the defect 202 is located, so that the driving mechanism 16 pushes the first winding mechanism 14 out from the initial position to wind the corresponding tape 200.

As described above, initially, the first winding mechanism 14 is in the avoiding position not contacting the tape 200, and when the second detecting element detects that a defect 202 mark 203 exists on a certain pole piece of the tape 200, the second detecting element transmits the information to the controller, and since the position of the defect 202 on the pole piece is determined, the controller can determine the position of the pole piece according to the information, and after the position of the pole piece is obtained, the controller can respectively calculate the time for transmitting the pole piece with the defect 202 to the first winding mechanism 14 according to the acquired transmission speed of the tape 200, thereby ensuring that the driving mechanism 16 is controlled to push out the first winding mechanism 14 at an accurate time, and ensuring that the first winding mechanism 14 accurately winds the pole piece.

In practical application, the controller is also electrically connected with the cutting mechanism so as to control the action of the cutting mechanism according to the position information detected by the second detection piece.

After the controller acquires the position of the corresponding pole piece according to the position information detected by the second detection piece, the time of the cutting position of the material belt 200 passing through the cutting mechanism can be calculated according to the conveying speed of the material belt 200 and the winding speed of the first winding mechanism 14, so that the cutting mechanism is accurately controlled to act, and the material belt 200 is cut.

In some embodiments, the controller is further electrically connected to the first winding mechanism 14, such that after the second detecting member detects the position information of the defect 202, the controller can control the first winding mechanism 14 to wind the material tape 200 with the defect 202 according to the conveying speed of the material tape 200, i.e. to ensure accurate access to the material tape 200 at the first winding mechanism 14.

It should be noted that, the first winding mechanism 14 and the cutting mechanism in the above embodiments are conventional mechanisms in the art, and those skilled in the art can adopt a mechanism with a corresponding specification according to actual requirements to wind and cut the material tape 200, which is not described herein again.

Referring to fig. 4, based on the single-layer winding device 10, the present invention further provides a winding apparatus for sequentially stacking and winding the first pole piece 210, the first diaphragm 220, the second pole piece 230, and the second diaphragm 240 to form a battery cell. Further, the winding apparatus includes two single-layer winding devices 10, and the two single-layer winding devices 10 are respectively disposed corresponding to the first pole piece 210 and the second pole piece 230, and are used for winding the portions of the first pole piece 210 and the second pole piece 230 with the defects 202 and separating the portions of the first pole piece 210 and the second pole piece 230 with the defects 202 from the rest portions, i.e. ensuring that the single-layer winding device 10 only winds the pole piece with the defects 202.

It should be noted that the first pole piece 210, the first diaphragm 220, the second pole piece 230, and the second diaphragm 240 are all in a band shape, wherein the first pole piece 210 and the second pole piece 230 are the tape 200 wound by the single-layer winding device 10, and the pole pieces on the first pole piece 210 and the second pole piece 230 are a positive pole piece and a negative pole piece, respectively.

Meanwhile, the single-layer winding apparatus 10 separates the portion of the first pole piece 210 and the second pole piece 230 having the defect 202 from the remaining portion by a cutting mechanism.

In some embodiments, the winding apparatus further includes a multi-layer winding device disposed at a downstream side of the single-layer winding device 10 for winding the first pole piece 210, the first separator 220, the second pole piece 230, and the second separator 240 in a stack.

It should be noted that the multi-layer winding apparatus is a conventional apparatus for winding the pole pieces and the diaphragms to form the battery cell, and similar to the single-layer winding apparatus 10, the multi-layer winding apparatus includes a second winding mechanism 31 and a deviation correcting mechanism, the second winding mechanism 31 is used for winding the first pole piece 210, the first diaphragm 220, the second pole piece 230 and the second diaphragm 240 together to form the battery cell, and the deviation correcting mechanism is used for performing deviation correcting processing during the transportation process of the first pole piece 210, the first diaphragm 220, the second pole piece 230 and the second diaphragm 240.

Meanwhile, it should be further explained that the deviation rectification mechanism in the multi-layer winding device can also rectify the deviation of the transportation of the first pole piece 210 and the second pole piece 230, but it can be determined that the deviation rectification of the first pole piece 210 in the above-mentioned belt shape is slowly performed by the deviation rectification mechanism, taking the first pole piece 210 as an example, after the deviation of the first pole piece 210 occurs, the first pole piece 210 is slowly brought back to the correct transportation path by the deviation rectification mechanism, and the deviation rectification mechanism rectifies the deviation in the transportation process of the first pole piece 210 to the second winding mechanism 31.

If the position of the first winding mechanism 14 cannot be adjusted, when a certain pole piece on the first pole piece 210 has a defect 202 and needs to be wound separately, the single-layer winding device 10 winds the pole piece, and the deviation rectifying mechanism of the multi-layer winding device does not operate during the winding process, after the winding of the single-layer winding device 10 is finished, the first pole piece 210 may have a deviation and a large deviation, and at this time, the multi-layer winding device still needs to continue to wind to form a battery cell, and the deviation rectifying mechanism cannot realize the deviation rectification of the first pole piece 210 in a short time, so that the alignment degree of the first pole piece 210 with the first diaphragm 220, the second pole piece 230 and the second diaphragm 240 may be poor, and before the deviation rectifying mechanism finishes the deviation rectification, the quality of the battery cell wound by the multi-layer winding device may be relatively low.

If the position of the first winding mechanism 14 can be adjusted, when a certain pole piece on the first pole piece 210 has a defect 202 and needs to be wound, it can be ensured that the first pole piece 210 does not shift or the shift is within an allowable range (affected by errors) after the single-layer winding device 10 finishes winding the pole piece, and at this time, the multilayer winding device performs winding, and the first pole piece 210 is better aligned with the first diaphragm 220, the second pole piece 230, and the second diaphragm 240, so that the formed battery cell has higher quality.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A single-ply winding apparatus, comprising:

a first detecting member for detecting a position of the tape with the defect;

2. The single-layer winding device according to claim 1, wherein the driving mechanism comprises a servo motor and a transmission assembly, the servo motor is electrically connected with the first detection member, the transmission assembly is connected to a driving end of the servo motor, and the first winding mechanism is connected to the transmission assembly.

3. The single-ply winding apparatus according to claim 1, further comprising a second detecting member disposed on an upstream side of the first detecting member for detecting a position of the defect on the tape with the defect;

4. A single-ply winding apparatus according to claim 3, wherein said first winding mechanism is electrically connected to said second detecting member, and said first winding mechanism winds said defective web based on position information detected by said second detecting member.

5. A single ply winding apparatus as claimed in claim 3 wherein the second sensing member is a colour sensor.

6. The single-layer winding device according to claim 1, further comprising a controller electrically connected to the first detecting member and the driving mechanism, respectively, wherein the controller controls the driving mechanism to drive the first winding mechanism according to the position information detected by the first detecting member.

7. The single-layer winding device according to claim 1, further comprising a cutting mechanism disposed between the first winding mechanism and the first detecting member for cutting the material tape.

8. The single ply winding apparatus of claim 1 wherein the first sensing member is a position sensor.

9. A winding apparatus comprising two single-layer winding devices according to any one of claims 1 to 8, the winding apparatus being configured to wind a first pole piece, a first separator, a second pole piece, and a second separator in a stack;

10. The winding apparatus according to claim 9, characterized in that the winding apparatus further comprises a multilayer winding device provided on a downstream side of the single-layer winding device for winding the first pole piece, the first separator, the second pole piece, and the second separator in a stack.