CN215578687U

CN215578687U - Battery cell winding device

Info

Publication number: CN215578687U
Application number: CN202121656059.8U
Authority: CN
Inventors: 刘琦; 雷磊; 白宗亮; 康宗维; 郭磊斌; 张永发
Original assignee: Yinlong New Energy Co Ltd; Hebei Yinlong New Energy Co Ltd
Current assignee: Yinlong New Energy Co Ltd; Hebei Yinlong New Energy Co Ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2022-01-18
Anticipated expiration: 2031-07-20

Abstract

The application relates to a battery core winding device, which comprises a tube body and a winding needle assembly. The body is equipped with first end and second end, first end adopts insulating material, the second end adopts electrically conductive material. The winding needle assembly comprises a first winding needle and a second winding needle, the first winding needle is connected with the first end portion in an inserting mode, the second winding needle is connected with the second end portion in an inserting mode, and the second winding needle drives the tube body to wind the first winding needle to rotate. Compared with the traditional battery cell winding device, the battery cell winding device has the advantages that the tube body comprises the first end part and the second end part, the first end part and the second end part are made of two materials, the combined structure is utilized, the die sinking cost of the insulating material is reduced, and the short circuit problem is effectively avoided. Moreover, the pipe body is used as a combined structure, when the first winding needle and the second winding needle are inserted into the pipe body, the insulating sleeve sleeved on the aluminum pipe in the prior art does not exist, the aluminum pipe and the insulating sleeve are not separated, the assembly is facilitated, and the automatic winding needle is suitable for automatic production.

Description

Battery cell winding device

Technical Field

The application relates to the field of batteries, in particular to an electric core winding device.

Background

The winding battery is composed of electric cores formed by winding combination, has high-rate discharge capacity, and is widely applied to various instruments, various standby power supplies and automobile power storage components.

The existing winding battery needs to complete winding through a central tube, and the central tube plays roles in heat conduction, positive and negative insulation and support in the battery. The existing central tube is usually composed of a central aluminum tube or PPS and an insulating sleeve which is sleeved on the central aluminum tube. When automatic material loading, put into the winder storage bit draw-in groove with the center tube earlier on, will roll up the needle again and insert inside the center tube cavity, roll up the needle and need align with the inner chamber of body, but because the size of rolling up needle and body is less, the condition of not aligning or even extruding storage bit draw-in groove with the center tube appears very easily, therefore this kind of integrated configuration is unfavorable for automatic material loading very much.

In view of the above, it is desirable to improve the conventional cell winding device to improve the assembling performance of the winding device.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that the battery cell winding device in the prior art is not easy to assemble and influences the working efficiency, the application provides a battery cell winding device.

The utility model provides a battery cell winding device, which comprises:

the tube body is provided with a first end part and a second end part, the first end part is made of insulating materials, and the second end part is made of conductive materials; and the number of the first and second groups,

the winding needle assembly comprises a first winding needle and a second winding needle, the first winding needle is connected with the first end portion in an inserting mode, the second winding needle is connected with the second end portion in an inserting mode, and the second winding needle drives the pipe body to wind the first winding needle to rotate.

In a preferred embodiment, the first end is provided with a first detent, which cooperates with the first winding needle to keep the first winding needle axially stationary.

Further, in the above embodiment, the first positioning portion includes an annular boss, and the first winding needle is provided with a fitting portion that abuts against the boss.

Or further, in the above embodiment, the mating surface formed by the boss and the fitting portion is a cylindrical surface or a conical surface.

Or further, in the above embodiment, the first positioning portion includes an annular cylinder, the pipe body is provided with an annular groove, the annular cylinder extends into the annular groove, and an inner wall of the annular cylinder is flush with an inner wall of the pipe body.

In a preferred embodiment, the second end is provided with:

the second positioning part is matched with the second winding needle so as to keep the second winding needle static in the axial direction; and the number of the first and second groups,

and the limiting part is matched with the second winding needle so that the second winding needle keeps static in the circumferential direction of the limiting part.

Further, in the above embodiment, the limiting portion includes a protrusion and a notch that are arranged at intervals along the circumferential direction of the tube, and the second winding needle is engaged with the protrusion and the notch.

Further, in the above embodiment, the outer edge of the protrusion is provided with a smooth transition portion.

In a preferred embodiment, the second positioning portion includes a step surface, and the step surface is disposed on an inner wall of the limiting portion.

In a preferred embodiment, the first and second ends are provided with a sleeve around their periphery to secure the first and second ends.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: according to the technical scheme, the tube body comprises a first end portion and a second end portion, the first end portion is made of insulating materials, the second end portion is made of conducting materials, a first winding needle and a second winding needle are respectively inserted from two ends of the tube body, the first winding needle is inserted into the first end portion, the second winding needle is inserted into the second end portion, and the second winding needle drives the tube body to rotate around the first winding needle. The first winding needle can be connected with the anode, the second winding needle can be connected with the cathode, and the first end part and the second end part are made of different materials, so that the cathode has an insulating effect. Compare traditional electric core take-up device, the body includes first end and second end, and first end and second end adopt two kinds of materials moreover, utilize this kind of integrated configuration, have reduced insulating material's die sinking cost, have also effectively avoided the short circuit problem. Moreover, the pipe body is used as a combined structure, when the first winding needle and the second winding needle are inserted into the pipe body, the insulating sleeve sleeved on the aluminum pipe in the prior art does not exist, the aluminum pipe and the insulating sleeve are not separated, the assembly is facilitated, and the automatic winding needle is suitable for automatic production.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present invention 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, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a cell winding device according to an embodiment of the present application;

fig. 2 is an exploded view of a cell winding device according to an embodiment of the present disclosure;

fig. 3 is a cross-sectional view of a cell winding device according to an embodiment of the present disclosure;

FIG. 4 is a cross-sectional view of a tube provided by an embodiment of the present application;

FIG. 5 is an enlarged view of the portion A in FIG. 4;

fig. 6 is a schematic structural diagram of a tube provided in an embodiment of the present application.

Wherein the reference numerals are:

100. a pipe body; 110. a first end portion; 111. a first positioning portion; 112. an annular cylinder; 120. a second end portion; 121. a second positioning portion; 1211. a step surface; 122. a limiting part; 1221. a projection; 1222. a notch; 130. a sleeve; 200. a needle winding assembly; 210. a first winding needle; 220. and a second winding needle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to solve the technical problem that the battery cell winding device in the prior art is not easy to assemble and affects the working efficiency, the application provides a battery cell winding device with reference to fig. 1-6. Utilize the electric core take-up device that this application provided, can prepare the coiling type battery, but the wide application is in all kinds of instruments, instrument, stand-by power supply and car electrical storage part, also can be applied to in all kinds of electronic toys and all kinds of smart machines.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a cell winding device according to an embodiment of the present application; fig. 2 is an exploded view of a cell winding device according to an embodiment of the present application. The utility model provides a battery cell winding device which comprises a tube body 100 and a winding needle assembly 200. The tube 100 has a first end 110 and a second end 120, wherein the first end 110 is made of an insulating material, and the second end 120 is made of a conductive material. The winding needle assembly 200 includes a first winding needle 210 and a second winding needle 220, the first winding needle 210 is inserted into the first end portion 110, the second winding needle 220 is inserted into the second end portion 120, and the second winding needle 220 drives the tube 100 to rotate around the first winding needle 210.

The first winding needle 210 and the second winding needle 220 are made of metal, the first winding needle 210 is inserted into the first end portion 110, the first end portion 110 is made of insulating material, and specifically, materials such as PPS, PVC, PET and the like can be adopted. The second winding pin 220 is inserted into the second end 120, and the second end 120 is made of a conductive material, specifically, an aluminum material, or an alloy steel such as white steel, tungsten steel, or other conductive materials applied in the industry. Since the second winding pin 220 drives the tube 100 to rotate together through the second end 120, a certain torque needs to be borne, and the metal material has better strength and rigidity, which is beneficial to power transmission. The tube 100 is hollow, and after the first winding needle 210 and the second winding needle 220 are inserted from two ends of the tube 100, the first winding needle 210 and the second winding needle 220 are kept relatively stationary at an axial position with respect to the tube 100, that is, the first winding needle 210 and the second winding needle 220 do not slide axially along the tube 100. The first winding needle 210 can be connected to a positive electrode, and the second winding needle 220 can be connected to a negative electrode, so that the first end portion 110 and the second end portion 120 are made of different materials, and the negative electrode has an insulating effect. The tube body 100 is made of two parts, and if all the parts are made of conductive materials such as aluminum materials, short circuit is easy to occur; if all the materials are PPS and the like, the mold opening is needed, and the cost is increased.

According to the technical scheme, the tube body 100 comprises a first end portion 110 and a second end portion 120, the first end portion 110 is made of an insulating material, the second end portion 120 is made of a conductive material, a first winding needle 210 and a second winding needle 220 are respectively inserted from two ends of the tube body 100, the first winding needle 210 is inserted into the first end portion 110, the second winding needle 220 is inserted into the second end portion 120, and the second winding needle 220 drives the tube body 100 to rotate around the first winding needle 210. The first winding needle 210 can be connected to a positive electrode, the second winding needle 220 can be connected to a negative electrode, and the first end portion 110 and the second end portion 120 are made of different materials, so that the negative electrode has an insulating effect. Compare traditional electric core coiling mechanism, adopt the integrated configuration of two kinds of materials, reduced insulating material's die sinking cost, also effectively avoided the short circuit problem. Compare traditional electric core coiling apparatus, body 100 includes first end 110 and second end 120, and first end 110 and second end adopt two kinds of materials moreover, utilize this kind of integrated configuration, have reduced insulating material's die sinking cost, have also effectively avoided the short circuit problem. Moreover, the tube 100 is a combined structure, and when the first winding needle 210 and the second winding needle 220 are inserted into the tube 100, because there is no insulating sleeve sleeved on the aluminum tube in the prior art, the aluminum tube and the insulating sleeve are not separated, which is more beneficial to assembly and is suitable for automatic production.

The working process of the utility model is as follows:

put into the storage bit draw-in groove of winder with central body 100 on, the winder begins to operate, and automatic feeding mechanism can take out body 100 and put in the screens. The first winding pin 210 and the second winding pin 220 are mounted at the same height on a jig, which is axially movable by an air cylinder. The collet then raises the body 100 to the same level as the first winding pin 210 and the second winding pin 220, and the first winding pin 210 and the second winding pin 220 are then simultaneously inserted into the cavity of the body 100 under the push of the cylinder. A first winding pin 210 is inserted into the first end 110 and a second winding pin 220 is inserted into the insulated second end 120. The second winding needle 220 is rotated by the driving force, and the tube 100 is rotated together by the second winding needle 220. The membrane is hot-melted on the tube body 100 by the hot knife, and the membrane wraps the positive and negative pole pieces and is wound into a lithium battery roll core along with the tube body 100 in the center.

Referring to fig. 3 and 4, fig. 3 is a cross-sectional view of a cell winding device according to an embodiment of the present disclosure; fig. 4 is a cross-sectional view of a tube 100 according to an embodiment of the present application. In a preferred embodiment, the first end portion 110 is provided with a first positioning portion 111, and the first positioning portion 111 cooperates with the first winding needle 210 to keep the first winding needle 210 axially stationary. The first end portion 110 is provided with a positioning portion to limit the position of the first winding needle 210 extending into the inner cavity of the tube 100, the first winding needle 210 axially enters the tube 100 under the driving of the air cylinder, and the first winding needle 210 is placed at the first positioning to continuously advance in the axial direction. The first positioning portion 111 and the first winding needle 210 can be limited by point contact, line contact or surface contact.

Referring to fig. 5, fig. 5 is an enlarged view of a portion a of fig. 4. Further, in the above embodiment, the first positioning portion 111 includes the annular boss, and the first winding needle 210 is provided with the fitting portion abutting against the boss. The first positioning portion 111 is provided with an annular boss, and the first winding needle 210 is movably abutted against the boss to realize limiting. The first winding needle 210 is generally provided with two or three sections having different outer diameters. The large end portion of the general outer diameter is connected to the jig, the small end portion of the outer diameter is inserted into the inner cavity of the tube 100, and the fitting portion of the first winding pin 210 is also formed in an annular structure and abuts against the boss.

In view of the assembling influence of the annular boss on the first winding needle 210, it is avoided that the machining precision of the annular boss influences the axial precision of the first winding needle 210, and further, in the above-described embodiment, the boss has a mating surface for abutting against the assembling portion, and the mating surface is provided as a tapered surface, or the mating surface is perpendicular to the axial direction of the first winding needle 210. The fitting surface is a conical surface, the fitting portion of the first winding needle 210 can form surface contact with the conical surface, and can also realize limiting through line contact, and the conical surface plays a role in automatic positioning when the first winding needle 210 gradually enters the inner cavity of the tube body 100, so that the axis of the first winding needle 210 is basically consistent with the central axis of the annular boss. If the mating surface is perpendicular to the axial direction of the first winding needle 210, it simply prevents the first winding needle 210 from continuing to penetrate into the tube 100, and does not have the function of centering.

With continued reference to fig. 5, or further, in the above embodiment, the first positioning portion 111 includes the annular cylinder 112, the tubular body 100 is provided with an annular groove, the annular cylinder 112 extends into the annular groove, and the inner wall of the annular cylinder 112 is flush with the inner wall of the tubular body 100. The annular cylinder 112 is attached to the annular groove of the tubular body 100 and can be fixed by clamping or gluing. The annular cylinder 112 extends into the pipe body 100, so that the matching area of the first positioning portion 111 and the pipe body 100 is increased, and the connection stability of the first positioning portion 111 and the pipe body 100 is improved. And the inner wall of the annular cylinder 112 is flush with the inner wall of the tubular body 100, helping to maintain the symmetry of the tubular body 100 itself.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a tube 100 according to an embodiment of the present disclosure. In a preferred embodiment, the location of the engagement of second winding pin 220 and second end 120 is optimized. The second end portion 120 is provided with a second positioning portion 121 and a limiting portion 122. The second positioning portion 121 cooperates with the second winding needle 220 to keep the second winding needle 220 stationary in the axial direction. The position-limiting portion 122 cooperates with the second winding pin 220, so that the second winding pin 220 remains stationary in the circumferential direction of the position-limiting portion 122. Since the second winding needle 220 drives the tube 100 to rotate together, the second winding needle 220 and the tube 100 need to be kept stationary not only in the axial direction but also in the circumferential direction. The second positioning portion 121 is similar to the first positioning portion 111 for keeping the second winding needle 220 stationary relative to the tube 100 in the axial direction, and the second positioning portion 121 may be similar to the first positioning portion 111, which can be referred to in detail in the foregoing embodiments. The engaging structure formed by the limiting portion 122 and the second winding needle 220 can bear the torque of the second winding needle 220 and transmit the torque of the second winding needle 220 to the tube 100. Specifically, the second winding pin 220 and the limiting portion 122 can realize power transmission through a clamping structure, an insertion structure, and the like.

Further, in the above embodiment, the stopper portion 122 includes the projection 1221 and the notch 1222 spaced apart from each other in the circumferential direction of the tube 100, and the second winding pin 220 engages with the projection 1221 and the notch 1222. The projections 1221 extend outward in the axial direction of the tubular body 100, and the projections 1221 are spaced from the notches 1222 in the circumferential direction of the tubular body 100. The projection 1221 may be provided in one or more, and the notch 1222 is spaced apart from the projection 1221. Fig. 6 shows that the number of the protrusions 1221 is four and the number of the notches 1222 is four, so that a plurality of engagement positions are formed in the circular direction with the second winding needle 220, so that the second winding needle 220 engages with the limiting portion 122, and the connection stability between the second winding needle 220 and the limiting portion 122 is further improved. In order to avoid interference when the second winding needle 220 enters the tube 100, the limiting portion 122 is disposed along the circumference of the tube 100. Preferably, the inner wall of the protruding portion 1221 may be configured as an arc surface, and the inner wall is attached to the portion of the second winding needle 220 entering the tube 100, so as to position the second winding needle 220 and reduce the shaking of the second winding needle 220.

Further, in the above embodiment, the outer edge of the projecting portion 1221 is provided with a rounded transition portion. In order to reduce the friction generated between the limiting part 122 and the second winding needle 220 in the assembling process, the outer edge of the protruding part 1221 is provided with a smooth transition part, and the edge of the protruding part is rounded, so that the winding needle and the central tube are positioned conveniently, and the second winding needle 220 is matched with the limiting part 122 quickly and smoothly.

With reference to fig. 6, in a preferred embodiment, the second positioning portion 121 includes a step surface 1211, and the step surface 1211 is disposed on an inner wall of the limiting portion 122. The second positioning portion 121 has the same function as the first positioning portion 111, and besides the positioning function, it is necessary to ensure that the second winding needle 220 and the second tubular body 100 are kept relatively still in a dynamic state. The second positioning portion 121 is provided with a step surface 1211, and the step surface 1211 is provided on the inner wall of the limiting portion 122, so that the structures of the second positioning portion 121 and the limiting portion 122 are independent and do not affect each other. The contact area of the step 1211 with the second winding needle 220 may be increased as needed to maintain dynamic balance.

In the production process, when the first winding needle 210 and the second winding needle 220 are pushed along with the cylinder, wherein the second winding needle 220 slides into the limiting portion 122 and is limited by the second positioning portion 121, the second winding needle 220 and the tube 100 are engaged with each other, and the first winding needle 210 slides into the tube 100 and is matched with the first positioning portion 111 to realize positioning.

With continued reference to fig. 5 and 6, in a preferred embodiment, the outer periphery of the first end portion 110 and the second end portion 120 is provided with a sleeve 130 to secure the first end portion 110 and the second end portion 120. The sleeve 130 is thermally melted, and is heated and tightly fitted around the outer circumference of the pipe body 100 after the temperature is lowered, so that the first end portion 110 and the second end portion 120 are fastened, and a next winding operation is performed.

According to the technical scheme, the tube body 100 comprises a first end portion 110 and a second end portion 120, the first end portion 110 is made of an insulating material, the second end portion 120 is made of a conductive material, a first winding needle 210 and a second winding needle 220 are respectively inserted from two ends of the tube body 100, the first winding needle 210 is inserted into the first end portion 110, the second winding needle 220 is inserted into the second end portion 120, and the second winding needle 220 drives the tube body 100 to rotate around the first winding needle 210. The first winding needle 210 can be connected to a positive electrode, the second winding needle 220 can be connected to a negative electrode, and the first end portion 110 and the second end portion 120 are made of different materials, so that the negative electrode has an insulating effect. Compare traditional electric core coiling mechanism, adopt the integrated configuration of two kinds of materials, reduced insulating material's die sinking cost, also effectively avoided the short circuit problem.

Compare traditional electric core coiling apparatus, body 100 includes first end 110 and second end 120, and first end 110 and second end adopt two kinds of materials moreover, utilize this kind of integrated configuration, have reduced insulating material's die sinking cost, have also effectively avoided the short circuit problem. Moreover, the tube 100 is a combined structure, and when the first winding needle 210 and the second winding needle 220 are inserted into the tube 100, because there is no insulating sleeve sleeved on the aluminum tube in the prior art, the aluminum tube and the insulating sleeve are not separated, which is more beneficial to assembly and is suitable for automatic production.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cell winding device, comprising:

the tube body (100) is provided with a first end part (110) and a second end part (120), the first end part (110) is made of an insulating material, and the second end part (120) is made of a conductive material; and the number of the first and second groups,

roll up needle subassembly (200), roll up needle subassembly (200) and include that first roll up needle (210) and second roll up needle (220), first roll up needle (210) with first end (110) are pegged graft, second roll up needle (220) with second end (120) are pegged graft, needle (220) are rolled up to the second drive body (100) are wound first roll up needle (210) are rotated.

2. The device according to claim 1, characterized in that the first end (110) is provided with a first detent (111), the first detent (111) cooperating with the first winding needle (210) to keep the first winding needle (210) axially stationary.

3. The device according to claim 2, characterized in that said first positioning portion (111) comprises an annular boss, said first winding needle (210) being provided with a fitting portion in abutment with said boss.

4. The device according to claim 3, wherein the boss has a mating surface for abutting against the fitting portion, the mating surface being provided as a tapered surface, or the mating surface being perpendicular to an axial direction of the first winding pin (210).

5. The device according to claim 2, characterized in that the first positioning portion (111) comprises an annular cylinder (112), the tubular body (100) is provided with an annular groove, the annular cylinder (112) extends into the annular groove, and the inner wall of the annular cylinder (112) is flush with the inner wall of the tubular body (100).

6. The device according to claim 1, characterized in that said second end (120) is provided with:

a second positioning portion (121), the second positioning portion (121) cooperating with the second winding needle (220) to keep the second winding needle (220) stationary in the axial direction; and the number of the first and second groups,

the limiting part (122) is matched with the second winding needle (220), so that the second winding needle (220) keeps static in the circumferential direction of the limiting part (122).

7. The device according to claim 6, wherein the limiting portion (122) comprises a protrusion (1221) and a notch (1222) arranged at intervals along a circumferential direction of the tube body (100), and the second winding needle (220) is engaged with the protrusion (1221) and the notch (1222).

8. Device according to claim 7, characterized in that the outer edge of the projection (1221) is provided with a rounded transition.

9. The device according to claim 6 or 7, characterized in that the second positioning portion (121) comprises a step surface (1211), and the step surface (1211) is arranged on the inner wall of the limiting portion (122).

10. The device according to claim 1, wherein the first end portion (110) and the second end portion (120) are peripherally provided with a sleeve (130) to fasten the first end portion (110) and the second end portion (120).