CN211507791U

CN211507791U - Winding device

Info

Publication number: CN211507791U
Application number: CN201922360820.2U
Authority: CN
Inventors: 陈玄银; 马林; 林江; 李晓媛; 李世松; 徐红彪
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-09-15
Anticipated expiration: 2029-12-25

Abstract

The utility model relates to a winding device, include: the winding component is used for winding the pole piece with the pole lug; the anti-folding component is arranged at the upstream of the winding component and comprises guide blowing pieces and a supporting component which are arranged at intervals and oppositely, and the tab can penetrate between the guide blowing pieces and the supporting component; the supporting component is provided with a supporting surface, the guide blowing piece is provided with an air outlet facing the supporting surface, and the air outlet can spray air to the lug so that the lug is abutted against the supporting surface. The embodiment of the utility model provides a winding device on satisfying the production requirement's of coiling electricity core basis, can avoid utmost point ear to turn over and roll over, improves power battery's yields and production efficiency.

Description

Winding device

Technical Field

The utility model relates to an energy storage battery's production facility technical field especially relates to a take-up device.

Background

In recent years, power batteries have been widely used in the automotive field. Generally, the assembly process of the power battery is to wind the first pole piece, the second pole piece and the isolation film into a battery core, and the battery core is put into a shell to be assembled into the battery. During winding, the tabs on the pole pieces are often found to be folded, and the folded tabs can cause short circuit of the battery, thereby causing the safety problem of the battery.

Therefore, a new winding device is needed.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a winding device on satisfying the basis of the production requirement of coiling electric core, can avoid utmost point ear to turn over and roll over, improves power battery's yields and production efficiency.

In one aspect, according to the embodiment of the present invention, a winding device is provided, including: the winding component is used for winding the pole piece with the pole lug; the anti-folding component is arranged at the upstream of the winding component and comprises guide blowing pieces and a supporting component which are arranged at intervals and oppositely, and the tab can penetrate between the guide blowing pieces and the supporting component; the supporting component is provided with a supporting surface, the guide blowing piece is provided with an air outlet facing the supporting surface, and the air outlet can spray air to the lug so that the lug is abutted against the supporting surface.

According to an aspect of the embodiment of the present invention, the supporting component includes a supporting member, the supporting surface is located at the supporting component, and the supporting member can be close to or away from the winding part under the action of the driving member.

According to the utility model discloses an aspect, supporting component still includes the guide rail, and support piece includes backup pad and keysets, and the holding surface is located the backup pad, and the keysets is connected in the backup pad, and support piece passes through keysets and guide rail sliding connection.

According to an aspect of the embodiment of the present invention, the support surface has an arc-shaped surface, and the arc-shaped surface protrudes toward the direction of the winding part.

According to the utility model discloses an aspect, the direction piece of blowing includes box baffle and guiding tube, and the box baffle has inside cavity, and the gas outlet sets up in the lateral wall of box baffle and communicates with inside cavity, and the guiding tube is pegged graft in the box baffle and is linked together inside cavity and outside air supply.

According to the utility model discloses an aspect, the quantity of gas outlet is a plurality of and the interval sets up on the box baffle.

According to the utility model discloses an aspect, the position of direction blowing piece is adjustable to adapt to the utmost point ear of different angles.

According to the utility model discloses an aspect, the guiding tube is the rigid tube, and the direction blowing piece further includes the external fixation subassembly, and the external fixation subassembly passes through the guiding tube and is connected with the box baffle.

According to the utility model discloses an aspect, external fixation subassembly includes dead lever and connecting block, and the dead lever is parallel and the interval setting with the guiding tube, is provided with more than two jacks on the connecting block, and dead lever and guiding tube insert one of them jack separately and are connected with the connecting block respectively.

According to an aspect of the embodiment of the present invention, the relative position of the connecting block and the guide tube is adjustable along the extending direction of the guide tube; and/or the relative position of the connecting block and the fixed rod is adjustable along the extension direction of the guide tube.

According to an aspect of an embodiment of the present invention, the guide blowing part further includes a flow control valve, and the flow control valve is disposed in the guide pipe; and/or, the winding device further comprises a guide roller, and the guide roller is arranged at the upstream of at least one of the guide blowing piece and the support piece.

According to the embodiment of the utility model provides a winding device, it includes the winding part and prevents a book part, the winding part is used for the coiling to have the pole piece of utmost point ear, prevent turning over the upper reaches of the winding part and including direction blowing piece and supporting component, because supporting component has the holding surface, direction blowing piece has the gas outlet towards the holding surface setting, when utmost point ear high-speed when passing between direction blowing piece and supporting component, the gas outlet can be to utmost point ear jet gas, make utmost point ear support to lean on in the holding surface, avoid utmost point ear to roll up the side shake of part and lead to turning over with the impact of winding part, the yields and the production efficiency of power battery are improved.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a winding device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second pole piece with a tab according to an embodiment of the present invention;

fig. 3 is a state view of the winding device according to the embodiment of the present invention;

fig. 4 is a schematic structural view of a support assembly according to an embodiment of the present invention;

fig. 5 is a schematic view of the guiding blowing member and the external fixing member according to the embodiment of the present invention.

Wherein:

100-a winding device;

10-a winding member;

20-a fold-preventing part;

21-a pilot blow; 21 a-air outlet; 211-box-type flow conductor; 212-a guide tube;

22-a support assembly; 22 a-a support surface; 221-a guide rail; 222-a support; 222 a-a support plate; 222 b-an adapter plate;

30-a guide roller;

40-an external fixation assembly; 41-a fixing rod; 42-connecting blocks;

201-a first pole piece; 202-a first diaphragm; 203-a second pole piece; 204-a second diaphragm; 205-tab.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The following description is given with the directional terms shown in the drawings and is not intended to limit the specific structure of the winding device of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

For a better understanding of the present invention, a winding device according to an embodiment of the present invention will be described in detail below with reference to fig. 1 to 5.

Please refer to fig. 1 to fig. 3 together, fig. 1 shows a schematic structural diagram of a winding device according to an embodiment of the present invention, fig. 2 shows a schematic structural diagram of a second pole piece with a tab according to an embodiment of the present invention, and fig. 3 is a diagram of a usage state of the winding device according to an embodiment of the present invention.

The winding device 100 can be used for winding a pole piece with a tab 205, wherein the pole piece can be a first pole piece 201 or a second pole piece 203, one of the first pole piece 201 and the second pole piece 203 is an anode piece, and the other is a cathode piece. The winding device 100 can wind the first pole piece 201, the first separator 202, the second pole piece 203, and the second separator 204 onto the winding member 10 in a stacked manner, thereby forming a battery cell.

The tab 205 has a thin plate structure. In actual production, in order to meet the requirement of the power battery on capacity density, the base material used by the pole piece is thinned, and the inertia moment of the thinned base material is reduced. Meanwhile, in order to meet the production efficiency, the winding speed is high, which results in a reduction in the impact bending resistance of the base material forming the tab 205 during high-speed winding. Therefore, the tab 205 is shaken during winding, and the shaken tab collides with the winding member 10 when entering the winding member 10, thereby folding back the tab 205.

The embodiment of the utility model provides a winding device 100, including the coiling part 10 and prevent turning over a part 20. The winding member 10 is used to wind the pole pieces having the tabs 205. The folding prevention part 20 is disposed upstream of the winding part 10, the folding prevention part 20 includes a guide blowing piece 21 and a support assembly 22 which are spaced and oppositely disposed, and the tab 205 can pass between the guide blowing piece 21 and the support assembly 22. The support assembly 22 has a support surface 22a, and the guide blower 21 has an air outlet 21a disposed facing the support surface 22a, the air outlet 21a being capable of injecting air toward the tab 205 so as to abut the tab 205 against the support surface 22 a.

Optionally, the winding member 10 may include a winding needle and a driving member, the driving member may drive the winding needle to rotate, and the first pole piece 201, the second pole piece 203, the first diaphragm 202, and the second diaphragm 204 are wound on the winding needle. When the tab 205 passes between the guiding blowing piece 21 and the supporting assembly 22, the gas outlet 21a can inject gas to the tab 205, so that the tab 205 abuts against the supporting surface 22a, the tab 205 is prevented from shaking towards the winding part 10 side and colliding with the winding part 10, the phenomenon of short circuit of the battery cell caused by the fact that the tab 205 is turned over is avoided, and the performance of the battery cell is improved.

As an alternative embodiment, the support surface 22a has an arc-shaped surface, with the arc-shape projecting in the direction of the winding member 10. The utmost point ear 205 of coiling on rolling up the needle can be toward turning over the book under the effect of centrifugal force, through the aforesaid setting for the arcwall face of supporting component 22 can smooth the utmost point ear 201 of coiling on rolling up the needle, and then better improvement the quality of electric core.

In specific implementation, it may be limited that the supporting surface 22a is an arc-shaped surface as a whole, and of course, it is only an optional implementation manner, in some other examples, the supporting surface 22a may also be an arc-shaped surface in part, the arc-shaped surface may be located on one side of the supporting surface 22a close to the winding part 10, and the rest of the supporting surface may be a plane as long as it can satisfy the smoothing effect on the tab 205 that has been wound on the winding part 10 and prevent the tab 205 to be wound from shaking and folding.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a supporting assembly 22 according to an embodiment of the present invention. As an alternative implementation manner, in the winding device 100 provided in each of the above embodiments, the support assembly 22 may include a support member 222, the support surface 22a is located on the support member 222, and the support member 222 can be close to or far from the winding member 10 under the action of the driving member. Through the arrangement, the distance between the supporting surface 22a and the winding part 10 can be adjusted by changing the position of the supporting piece 222, so that under the condition that the size of the winding part 10 is changed after winding, the interference between the supporting assembly 22 and the winding part 10 is avoided, meanwhile, the requirement of the arc-shaped surface on the supporting surface 22a for smoothing the tab 205 wound on the winding needle can be met, and the performance of the winding device 100 is optimized. The support 222 can be driven by a rack and pinion, a lead screw, or the like, to move the support 222 relative to the winding member 10.

In some alternative embodiments, the support assembly 222 further includes a guide rail 221, the support member 222 includes a support plate 222a and an adapter plate 222b, the support surface 22a is located on the support plate 222a, the adapter plate 222b is connected to the support plate 222a, and the support member 222 is slidably connected to the guide rail 221 through the adapter plate 222b, so as to realize the movement of the support member 222 relative to the winding member 10. The support member 222 with the above structure can ensure the smoothing effect on the tab 205 and realize the stability of the movement of the support member.

Alternatively, the supporting plate 222a may be made by cutting a mylar sheet into a rectangular strip shape and bending the strip shape into a certain arc, or may be made by other machining methods, which are not limited in this embodiment.

Optionally, the adapter plate 222b may have a strip-shaped structure, one end of the adapter plate 222b may be detachably connected to the support plate 222a by a fastener, and the other end of the adapter plate 222b may have a slider that extends into the guide rail 221 and is slidably connected to the guide rail 221, and is slidably connected to the guide rail 221 by the slider.

Alternatively, the above embodiments provide the winding device 100, in which the position of the guiding blowing piece 21 is adjustable to adapt to the tabs 205 with different angles. The position of the guide blowing piece 21 can be adjusted by means of a cylinder, a slide rail, etc. By adjusting the position of the guiding blowing piece 21, the blowing direction of the tab 205 can be adjusted to adapt to the change of the angle of the tab 205 in the winding process, so that the tab 205 is attached to the supporting component 22 more stably.

Referring to fig. 5, fig. 5 is a schematic view illustrating the cooperation between the guiding blowing piece 21 and the external fixing piece according to the embodiment of the present invention. As an alternative implementation manner, in the winding device 100 provided in each of the above embodiments, the guiding blower 21 may include a box-shaped flow guiding body 211 and a guiding pipe 212, the box-shaped flow guiding body 211 has an inner chamber, the air outlet 21a is disposed on a sidewall of the box-shaped flow guiding body 211 and is communicated with the inner chamber, and the guiding pipe 212 is inserted into the box-shaped flow guiding body 211 and communicates the inner chamber with an external air source. When gas needs to be sprayed to the supporting surface 22a, an external gas source can be started, the gas provided by the external gas source is introduced into the inner chamber of the box-shaped flow guide body 211 through the guide pipe 212, and when the pressure of the inner chamber reaches a predetermined value, the gas can be sprayed out from the gas outlet 21a, so that the tab 205 between the guide blowing piece 21 and the supporting assembly 22 can be abutted against the supporting surface 22a under the action of the sprayed gas, and the tab 205 is prevented from shaking towards the winding part 10 side and impacting the winding part 10 to cause turnover. The guide blowing piece 21 adopts the above form, and has a simple structure and is easy to form on the basis of meeting the functional requirements of the winding device 100.

Alternatively, the cross-sectional shape of the box-shaped baffle 211 in the axial direction of the guide pipe 212 may be a circle, an ellipse, a polygon, or the like, and the extending direction of the air outlet 21a intersects with the axial direction of the guide pipe 212. The mentioned external air source may be an air pump, which may be a separately equipped air pump, or of course, an air pump already existing in the winding device 100 itself, as long as the air supply requirement directed to the blowing member 21 is satisfied.

As an alternative embodiment, the number of the air outlets 21a is plural and the air outlets are spaced apart from each other on the box-shaped flow guiding body 211. The air outlets 21a arranged at intervals can meet the requirements of vibration prevention and turnover of the tabs 205 with different sizes, so that the application range of the winding device 100 is wider. Meanwhile, the plurality of air outlets 21a arranged at intervals can increase the contact area with the tab 205, and can better avoid the operating tab 205 from shaking towards the side of the winding part 10 and impacting the winding part 10.

Alternatively, a plurality of the air outlets 21a may be arranged at intervals along the axial direction of the guide pipe 212. Further, the centers of the plurality of air outlets 21a may be located on the same line.

As an alternative embodiment, the guide tube 212 may be a rigid tube, and the winding device 100 further includes an external fixing assembly 40, and the external fixing assembly 40 is connected to the box-type current carrier 211 through the guide tube 212. Through the arrangement, the guide pipe 212 can conduct drainage to the inside of the box-shaped flow guide body 211, and meanwhile, the support can be provided for the box-shaped flow guide body 211, so that the box-shaped flow guide body 211 is hung at a preset position. While a correspondingly arranged external fixing assembly 213 can facilitate the mounting of the pilot blow piece 21.

In some alternative embodiments, the external fixing assembly 40 may include a fixing rod 41 and a connecting block 42, the fixing rod 41 is parallel to and spaced apart from the guide tube 212, the connecting block 42 is provided with more than two insertion holes, and the fixing rod 41 and the guide tube 212 are inserted into one of the insertion holes and respectively connected to the connecting block 42. The external fixing member 213, which has the above-mentioned structure, can satisfy the installation requirement of the guide blowing member 21, and has a simple structure, and is easily connected to the guide pipe 212.

As an alternative embodiment, the relative position of the connecting block 42 and the guide tube 212 may be adjustable along the extension direction of the guide tube 212. Through the arrangement, the relative position between the box-type current carrier 211 and the supporting component 22 can be changed by adjusting the relative position between the guide pipe 212 and the connecting block 42, and the processing and assembling errors can be compensated, so that the box-type current carrier 211 and the supporting component 22 can better act on the tab 205, and the tab 205 is prevented from vibrating and turning over.

Alternatively, the cross section of the guide tube 212 in the axial direction may be a polygon, and the cross section may be in clearance fit with the insertion hole of the connection block 42, so that the requirement of adjusting the relative position of the connection block 42 and the guide tube 212 can be met by sliding the guide tube 212 relative to the connection block 42. Of course, the above-mentioned matching manner is only an optional manner, and in some other embodiments, the cross section of the guide tube 212 in the axial direction thereof may be circular, and the cross section is screwed with the insertion hole on the connecting block 42, which can also meet the requirement of adjusting the relative position of the two.

Of course, the adjustment of the relative position between the box-shaped baffle 211 and the support assembly 22 is not limited to the above structure, in some other examples, the relative position between the connection block 42 and the fixing rod 41 may be adjustable along the extending direction of the guide pipe 212, and the connection block 42 drives the guide pipe 212 and the box-shaped baffle 211 to move relative to the fixing rod 41, so as to also meet the requirement of adjusting the position of the box-shaped baffle 211.

Similarly, the cross section of the fixing rod 41 in the axial direction may be polygonal, and the cross section may be in clearance fit with the insertion hole of the connecting block 42, so that the requirement of adjusting the relative position between the connecting block 42 and the fixing rod 41 can be met by sliding the connecting block 42 relative to the fixing rod 41. Of course, the above-mentioned matching manner is only an optional manner, and in some other embodiments, the cross section of the fixing rod 41 in the axial direction thereof may be circular, and the fixing rod is in threaded connection with the insertion hole on the connecting block 42, which can also meet the requirement of adjusting the relative position of the two.

As an alternative implementation manner, in the winding device 100 provided in each of the above embodiments, the guiding blowing member 21 further includes a flow control valve, and the flow control valve is disposed in the guiding tube 212, so that the flow rate of the gas entering the inside of the box-shaped guiding body 211 and further the flow rate of the gas ejected from the gas outlet 21a can be effectively controlled through the flow control valve, and the requirements of preventing the tab 205 from vibrating and breaking are better met.

In some optional embodiments, the winding device 100 provided in each of the above embodiments further includes a guide roller 30, the guide roller 30 is disposed upstream of at least one of the guide blowing member 21 and the support assembly 22, and by disposing the guide roller 30, at least one of the first pole piece 201, the second pole piece 203, the first membrane 202 and the second membrane 204 can be supported and guided to travel along a predetermined path, so as to optimize the performance of the winding device 100.

Therefore, the embodiment of the present invention provides a winding device 100, because it includes winding part 10 and prevents turning over a part 20, and winding part 10 can be used for coiling the pole piece that has utmost point ear 205, prevent turning over a part 20 and set up in winding part 10's upper reaches and include direction blowing piece 21 and supporting component 22, simultaneously because supporting component 22 has a holding surface 22a, direction blowing piece 21 has the gas outlet 21a that sets up towards holding surface 22 a. When the tab 205 passes through the guide blowing piece 21 and the support assembly 22 at a high speed, the gas outlet 21a can spray gas to the tab 205, so that the tab 205 abuts against the support surface 22a, the tab 205 is prevented from shaking towards the winding part 10 side and colliding with the winding part 10 to cause turnover, the yield and the production efficiency of the power battery are improved, and the power battery is easy to popularize and use.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A winding device, comprising:

the winding component is used for winding the pole piece with the pole lug;

the anti-folding component is arranged at the upstream of the winding component and comprises guide blowing pieces and supporting components which are arranged at intervals and oppositely, and the tab can penetrate through the guide blowing pieces and the supporting components;

the supporting assembly is provided with a supporting surface, the guide blowing piece is provided with an air outlet facing the supporting surface, and the air outlet can spray air to the tab so that the tab is abutted against the supporting surface.

2. Spooling apparatus as claimed in claim 1, wherein the support assembly comprises a support member, the support surface being located on the support member, the support member being movable towards and away from the spooling member under the influence of a drive member.

3. The winding device according to claim 2, wherein the support assembly further comprises a guide rail, the support member comprises a support plate and an adapter plate, the support surface is located on the support plate, the adapter plate is connected to the support plate, and the support member is slidably connected to the guide rail through the adapter plate.

4. Spooling apparatus as claimed in claim 2, characterized in that the support surface has an arcuate surface, and the arcuate surface projects in the direction of the spooling member.

5. The winding device according to claim 1, wherein the position of the pilot blowing member is adjustable to accommodate the tabs at different angles.

6. The winding device according to any one of claims 1 to 5, wherein the guiding blowing member comprises a box-shaped flow guiding body having an inner chamber, and a guiding tube inserted into the box-shaped flow guiding body and communicating the inner chamber with an external air source, wherein the air outlet is disposed at a side wall of the box-shaped flow guiding body and communicating with the inner chamber.

7. The winding device as claimed in claim 6, wherein the number of the air outlets is plural and the air outlets are arranged at intervals on the box-shaped flow guiding body.

8. The spooling apparatus of claim 6, wherein the guide tube is a rigid tube, the spooling apparatus further comprising an external fixation assembly, the external fixation assembly being connected to the box-type flow conductor through the guide tube.

9. The winding device according to claim 8, wherein the external fixing member comprises a fixing rod and a connecting block, the fixing rod is parallel to and spaced apart from the guide tube, the connecting block is provided with more than two insertion holes, and the fixing rod and the guide tube are inserted into one of the insertion holes and are respectively connected with the connecting block.

10. Spooling apparatus as claimed in claim 9, characterized in that the relative position of the connecting piece and the guide tube is adjustable in the direction of extension of the guide tube; and/or the relative position of the connecting block and the fixing rod is adjustable along the extension direction of the guide tube.

11. The winding device of claim 6, wherein the pilot blower further comprises a flow control valve disposed within the pilot tube;

and/or, the winding device further comprises a guide roller, and the guide roller is arranged at the upstream of at least one of the guide blowing piece and the support component.