CN220873659U

CN220873659U - Split type clamping device, needle winding mechanism and winding module

Info

Publication number: CN220873659U
Application number: CN202322258988.9U
Authority: CN
Inventors: 尹文志; 韩林; 梁光照; 楼杰; 侯增健; 郑明清; 项海标
Original assignee: Zhejiang Liwei Energy Technology Co ltd
Current assignee: Zhejiang Liwei Energy Technology Co ltd
Priority date: 2023-08-21
Filing date: 2023-08-21
Publication date: 2024-04-30
Anticipated expiration: 2033-08-21

Abstract

The utility model discloses a split type clamping device, a needle winding mechanism and a winding module, wherein the clamping device comprises a clamping piece and an elastic piece, and a clamping part is arranged on the clamping piece and used for clamping a diaphragm; the clamping piece is provided with a clamping shoulder and a positioning groove, and the elastic piece is installed in the positioning groove. The needle winding mechanism comprises a first outer needle and a first inner needle, wherein the first outer needle is provided with a containing groove, the first inner needle comprises a plurality of any clamping devices, and the clamping devices are all installed in the containing groove. The winding module comprises a second outer needle, a second inner needle and a winding needle seat, wherein the second inner needle is arranged on the second outer needle, and the first outer needle and the second outer needle are arranged on the winding needle seat. The utility model solves the problems that the inner clamping needle of the traditional needle winding mechanism is easy to deform and the size of a coiled battery core is limited, thereby improving the clamping degree and the coiling adaptability of the inner clamping needle.

Description

Split type clamping device, needle winding mechanism and winding module

Technical Field

The utility model relates to the technical field of lithium battery production equipment, in particular to a split clamping device, a winding needle mechanism and a winding module.

Background

The winding type lithium battery cell is prepared by winding an overlapped positive and negative electrode plate and a diaphragm, and the winding process is realized by adopting a winding needle. The existing winding needle is generally provided with two clamping pieces which can be mutually close to or far away from each other, one of the clamping pieces is fixed and is a non-moving piece, the other clamping piece can move relatively to the non-moving piece, and a gap for clamping the pole piece and the diaphragm is formed between the moving piece and the non-moving piece.

When winding the winding core, the diaphragm needs to be wound for a certain length, and generally, an inner clamping needle is respectively arranged at the clamping gap of the moving sheet and the non-moving sheet, and the two inner clamping needles clamp the diaphragm through mutual occlusion.

For example, a rolling needle with adjustable rolling diameter and a rolling needle mechanism with adjustable rolling diameter disclosed in Chinese patent document with the publication number of CN205810980U comprise an inner needle and an outer needle. The inner needle comprises a first inner needle block and a second inner needle block which are butted with each other and are matched with each other in a open-close mode, the outer needle comprises a first outer needle block and a second outer needle block which are butted with each other and are matched with each other in a open-close mode, and the first inner needle block and the second inner needle block are contained between the first outer needle block and the second outer needle block. The winding needle mechanism can achieve the purpose of changing the winding diameter by changing the relative distance between the first outer needle block and the second outer needle block.

However, the conventional needle winding mechanism such as the one described above has the following problems:

Firstly, an inner needle or an inner clamping needle for clamping a diaphragm is of a strip-shaped structure, is thinner in structure, is subjected to thrust in the winding process and clamps the diaphragm, but the diaphragm of a battery core cannot occupy the whole length of the inner clamping needle due to different types of the battery core, so that part of the inner clamping needle is used for clamping the diaphragm, and the other part of the inner clamping needle is not used for clamping the diaphragm, so that step change can be generated at the junction of the two parts, the inner clamping needle can deform after long-term use under the action of the thrust, and the flatness of the inner clamping needle is poor, the clamping degree is reduced, and the service life is reduced;

Secondly, the existing inner clamping needle is required to bear certain pressure, so that the structure cannot be designed into an excessively narrow and thin structure so as to improve the bearing capacity, but the rolled battery cell is larger in width, and when the battery cell with narrower width needs to be rolled, the size of the battery cell is limited.

In view of this, there is a need for structural improvement to existing winding needles.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model provides a split clamping device, a winding needle mechanism and a winding module, which are used for solving the problems that an inner clamping needle of the existing winding needle mechanism is easy to deform and the size of a coiled battery cell is limited, so that the clamping degree and the winding adaptability of the inner clamping needle are improved.

The utility model discloses a split type clamping device which comprises a clamping piece and an elastic piece, wherein the clamping piece is provided with a clamping part for clamping a diaphragm; the clamping piece is provided with a clamping shoulder and a positioning groove, and the elastic piece is installed in the positioning groove.

Preferably, the elastic piece is of a sheet structure, and the edge of the elastic piece abuts against the inner wall of the positioning groove to form a bulge-shaped structure.

Preferably, the clamping part is of a strip-shaped structure, and the clamping part is arranged along the length direction of the clamping piece.

Preferably, the clamping shoulder is provided with the clamping part along the length direction thereof, the width of the clamping shoulder is larger than that of the clamping part, and the section along the width direction of the clamping part is T-shaped.

The utility model discloses a needle winding mechanism which comprises a first outer needle and a first inner needle, wherein an accommodating groove is formed in the first outer needle, the first inner needle comprises a plurality of any clamping devices, and the clamping devices are all arranged in the accommodating groove.

Preferably, the receiving groove is elongated, and the plurality of clamping devices are arranged along a length direction of the receiving groove.

Preferably, the section of the accommodating groove is T-shaped, the elastic piece abuts against the bottom of the accommodating groove, and the clamping shoulder of the clamping piece abuts against the inner surface of the accommodating groove.

Preferably, the first outer needle is provided with a mounting groove at one end of the accommodating groove, and the first inner needle comprises a limiting piece which is mounted in the mounting groove.

Preferably, a limiting end is arranged at one end, far away from the mounting groove, of the accommodating groove, and a limiting part matched with the limiting end is arranged on the clamping piece, close to the limiting end.

The utility model discloses a winding module, which comprises any one of the winding needle mechanisms, a second outer needle, a second inner needle and a winding needle seat, wherein the second inner needle is arranged on the second outer needle, and the first outer needle and the second outer needle are arranged on the winding needle seat.

The utility model has the beneficial effects that:

Firstly, the first inner needle adopts a split type design, each clamping device is an independent individual and is elastically connected in the accommodating groove of the first outer needle through an elastic piece, when the first inner needle clamps the diaphragm, the plurality of clamping devices can respectively carry out adaptive angle adjustment, the diaphragm is integrally clamped under the action of the elastic piece, the angle adjustment adapts to the change of the steps in the thickness direction generated by the edge of the diaphragm, the integral bending can not occur due to the step change of the edge of the diaphragm, and the conditions of deformation, poor flatness, reduced clamping degree and reduced service life of the first inner needle are further caused;

secondly, because the first inner needle adopts split type design, a plurality of clamping devices clamp the diaphragm together, and the size of a single clamping device can be made very thin and still possess very high bearing capacity, thereby adapt to the narrower electric core of coiling width, and can not be because of the size of self is restricted.

Therefore, the utility model solves the problems that the inner clamping needle of the existing needle winding mechanism is easy to deform and the size of the battery core capable of being wound is limited, thereby improving the clamping degree and the winding adaptability of the inner clamping needle.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

FIG. 1 is a schematic view of the overall structure of a winding module according to the present utility model;

FIG. 2 is an exploded view of the needle winding mechanism of the present utility model showing the mounting relationship of the first inner needle to the first outer needle;

Fig. 3 is a sectional view of the first outer needle for illustrating a sectional shape of the accommodating groove;

FIG. 4 is a schematic structural view of the clamping device near the limiting end, showing the clamping portion and the clamping shoulder;

fig. 5 is a second schematic structural view of the clamping device near the limiting end, for illustrating the positioning slot;

fig. 6 is a schematic structural view of the second outer needle and the second inner needle.

Split type clamping device, needle winding mechanism and winding module

Reference numerals illustrate:

01. A diaphragm; 1. a first outer needle; 11. a receiving groove; 111. a limiting end; 12. a mounting groove; 121. positioning holes; 2. a first inner needle; 21. a clamping device; 211. a clamping member; 2111. a clamping part; 2112. a clamping shoulder; 2113. a positioning groove; 2114. a limit part; 212. an elastic member; 22. a limiting piece; 221. a mounting hole; 3. a second outer needle; 31. a connecting groove; 4. a second inner needle; 5. a needle rolling seat.

Detailed Description

Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the sake of simplicity of the drawing, some well-known and conventional structures and elements are shown in the drawings in a simplified schematic manner.

It should be noted that all directional indicators such as up, down, left, right, front, and rear … … in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a specific posture such as that shown in the drawings, and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions of the "first", "second", etc. in this application are for descriptive purposes only and are not intended to specifically indicate a sequential or a cis-position, nor are they intended to limit the utility model, but are merely intended to distinguish between components or operations described in the same technical term, and are not to be construed as indicating or implying a relative importance or implying that the number of technical features indicated is not necessarily limited. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

For a further understanding of the utility model, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:

Referring to fig. 4 and 5, in order to disclose a split type clamping device according to the present utility model, the clamping device 21 includes a plurality of clamping members 211 and an elastic member 212 mounted on each clamping member 211, the clamping members 211 have a block-shaped structure of an elongated shape, clamping portions 2111 are provided on one surface of the clamping members 211, the clamping portions 2111 have a convex prismatic structure, the clamping portions 2111 are elongated and are arranged along a length direction of the clamping members 211, the clamping portions 2111 are provided with two clamping portions 2111, and the two clamping portions 2111 are parallel to each other and are provided with a space.

Referring to fig. 4 and 5, the clamping member 211 is provided with clamping shoulders 2112 at both sides of the clamping portion 2111, the clamping portion 2111 is provided in the middle between the two clamping shoulders 2112, the clamping shoulders 2112 are of a stepped structure provided along the length direction of the clamping member 211, the width of the clamping shoulders 2112 is larger than that of the clamping portion 2111, the two clamping shoulders 2112 make the cross section of the clamping member 211 in a T shape, and the cross section is obtained by cutting the clamping member 211 in a direction facing the length direction of the clamping member 211; the clamping member 211 further has a surface opposite to the clamping portion 2111, and a positioning groove 2113 is formed in the surface of the clamping member 211, the positioning groove 2113 is a groove, and the elastic member 212 is installed in the positioning groove 2113.

Referring to fig. 4 and 5, each of the positioning grooves 2113 of each clamping member 211 is provided with one of the elastic members 212, in this embodiment, the elastic members 212 are rectangular metal sheets, and two ends of each elastic member 212 respectively abut against two opposite side walls of the positioning groove 2113, so that the elastic members 212 are raised to form an arch structure, and the direction of the raised elastic members 212 is away from the bottom of the positioning groove 2113.

Referring to fig. 2 to 5, the present utility model also discloses a needle winding mechanism comprising a first outer needle 1 and a first inner needle 2, the first inner needle 2 being mounted on the first outer needle 1, wherein the first outer needle 1 has a length and the length direction is a winding axis direction, the first outer needle 1 is provided with a receiving groove 11, the receiving groove 11 is a long groove and is disposed along the length direction of the first outer needle 1, the receiving groove 11 is provided with a long opening on the surface of the first outer needle 1, the opening of the receiving groove 11 also extends along the length direction of the first outer needle 1, the cross section of the receiving groove 11 is T-shaped, and the cross section is cut with the first outer needle 1 facing the length direction of the first outer needle 1 perpendicular to the length direction of the first outer needle, thereby the inside of the receiving groove 11 has a stepped structure.

Referring to fig. 2-5, one end of the opening of the accommodating groove 11 is a limiting end 111, the limiting end 111 is in an arc structure, and the inside of the accommodating groove 11 at the limiting end 111 is also in a step structure for limiting the clamping device 21; the open-ended other end of holding tank 11 is connected with mounting groove 12, and mounting groove 12 is the recess, and mounting groove 12 is linked together with holding tank 11, and the opening orientation of mounting groove 12 is the same with the opening orientation of holding tank 11, and two locating holes 121 have been seted up to the bottom of mounting groove 12, and locating hole 121 is circular shape blind hole.

Referring to fig. 2 to 5, the first inner needle 2 includes a plurality of the above-mentioned clamping devices 21, and further includes a stopper 22, wherein the plurality of clamping devices 21 are arranged in the accommodating groove 11 along the length direction of the accommodating groove 11, the length direction of the clamping piece 211 of each clamping device 21 is parallel to the length direction of the accommodating groove 11, the clamping portion 2111 of the clamping piece 211 faces the outer side of the opening of the accommodating groove 11, and two clamping shoulders 2112 of the clamping piece 211 respectively abut against steps on two sides of the opening of the accommodating groove 11; the bulge direction of the elastic member 212 of each clamping device 21 faces the bottom of the accommodating groove 11, and the elastic member 212 abuts against the bottom of the accommodating groove 11, so that the elastic member 212 tends to push the clamping member 211 to the outside of the accommodating groove 11, and the clamping portion 2111 of the clamping member 211 can compress the elastic member 212 after being pressed.

Referring to fig. 2 to 5, an arc-shaped limiting portion 2114 is further provided on the clamping member 211 of the clamping device 21 near the limiting end 111 of the accommodating groove 11, and the limiting portion 2114 has a stepped structure and continuously and smoothly transits with the clamping shoulder 2112, so that the clamping member 211 at the limiting end 111 can be matched with the accommodating groove 11 and completely seal the accommodating groove 11; in addition, the above-mentioned spacing piece 22 is installed in the installation groove 12, the installation hole 221 is formed on the spacing piece 22, the installation hole 221 is a through hole, and after the spacing piece 22 is fixed on the installation hole 221 by the locking piece (not shown in the figure) penetrating through the installation hole 221, the spacing piece 22 can be fixed in the installation groove 12, so as to play a role in limiting the clamping device 21 in the accommodating groove 11, and avoid the clamping device 21 from sliding out from the installation groove 12.

Referring to fig. 1-6, the present utility model further discloses a winding module, which comprises the above-mentioned winding mechanism, and further comprises a second outer needle 3, a second inner needle 4, and a winding seat 5, wherein the second outer needle 3 has a length and the length direction is a winding axis direction, that is, the second outer needle 3 and the first outer needle 1 are parallel to each other, a gap is provided between the second outer needle 3 and the first outer needle 1, a septum 01 to be wound is to be inserted into the gap, a connection groove 31 is provided on the second outer needle 3, the connection groove 31 is a strip-shaped groove, the opening of the connection groove 31 and the opening of the accommodating groove 11 are mutually arranged towards each other, and the connection groove 31 is arranged along the length direction of the second outer needle 3.

Referring to fig. 1 to 6, the second inner needle 4 is installed in the connection groove 31, and the second inner needle 4 is of a unitary, elongated structure, and is engaged with the first inner needle 2 along its length direction; the first outer needle 1 and the second outer needle 3 are jointly installed on the needle rolling seat 5, the second outer needle 3 can be driven to move towards a direction close to or far away from the first outer needle 1 through the needle rolling seat 5, so that a gap between the first outer needle 1 and the second outer needle 3 is widened or narrowed, the diaphragm 01 is installed and clamped, and in addition, the needle rolling seat 5 is used for driving the first outer needle 1 and the second outer needle 3 to integrally rotate, so that winding action is generated.

Referring to fig. 1 to 6, when the septum 01 is wound, the septum 01 is inserted into a gap between the first outer needle 1 and the second outer needle 3, so that the plurality of clamping devices 21 of the first inner needle 2 and the second inner needle 4 clamp the septum 01 in a clamping manner, and then the first outer needle 1 and the second outer needle 3 are driven to rotate around a winding axis together through the winding hub 5, thereby realizing the operation of winding the septum 01.

The implementation principle and the beneficial effects of the utility model are as follows:

Firstly, the first inner needle 2 adopts a split type design, each clamping device 21 is an independent body and is elastically connected in the accommodating groove 11 of the first outer needle 1 through the elastic piece 212, when the first inner needle 2 clamps the diaphragm 01, the plurality of clamping devices 21 can respectively carry out adaptive angle adjustment, the diaphragm 01 is integrally clamped under the action of the elastic piece 212, the angle adjustment adapts to the change of the steps generated by the edge of the diaphragm 01 in the thickness direction, the integral bending caused by the step change at the edge of the diaphragm 01 is avoided, and the conditions of deformation, poor flatness, reduced clamping degree and reduced service life of the first inner needle 2 are further caused;

Secondly, because the first inner needle 2 adopts a split type design, the plurality of clamping devices 21 jointly clamp the diaphragm 01, and the size of the single clamping device 21 can be made to be very thin and still has very high bearing capacity, so that the battery cell with narrower winding width is suitable, and the battery cell cannot be limited due to the size of the battery cell.

The above is merely an embodiment of the present utility model, and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present utility model, should be included in the scope of the claims of the present utility model.

Claims

1. The split type clamping device is characterized in that the clamping device (21) comprises a clamping piece (211) and an elastic piece (212), and a clamping part (2111) is arranged on the clamping piece (211) and used for clamping a diaphragm (01); clamping shoulders (2112) and positioning grooves (2113) are formed in the clamping pieces (211), and the elastic pieces (212) are installed in the positioning grooves (2113).

2. The split clamping device according to claim 1, wherein the elastic member (212) is of a sheet-like structure, and an edge of the elastic member (212) abuts against an inner wall of the positioning groove (2113) to form a bulge-like structure.

3. The split clamping device according to claim 1, wherein the clamping portion (2111) is of an elongated structure, and the clamping portion (2111) is disposed along a length direction of the clamping member (211).

4. A split type clamping device according to claim 3, wherein the clamping shoulder (2112) is provided with the clamping portion (2111) along a length direction thereof, a width of the clamping shoulder (2112) is larger than a width of the clamping portion (2111), and a cross section along a width direction of the clamping member (211) is T-shaped.

5. The utility model provides a roll needle mechanism, its characterized in that includes first outer needle (1) and first inner needle (2), holding tank (11) have been seted up on first outer needle (1), first inner needle (2) include a plurality of claims 1-4 arbitrary clamping device (21), clamping device (21) are all installed in holding tank (11).

6. Needle winding mechanism according to claim 5, characterized in that the receiving groove (11) is elongated and in that a plurality of clamping means (21) are arranged along the length of the receiving groove (11).

7. Needle winding mechanism according to claim 6, characterized in that the cross section of the accommodating groove (11) is T-shaped, the elastic element (212) abuts against the bottom of the accommodating groove (11), and the clamping shoulder (2112) of the clamping element (211) abuts against the inner surface of the accommodating groove (11).

8. The needle winding mechanism according to claim 6, characterized in that the first outer needle (1) is provided with a mounting groove (12) at one end of the receiving groove (11), the first inner needle (2) comprises a limiting member (22), and the limiting member (22) is mounted in the mounting groove (12).

9. The needle winding mechanism according to claim 8, wherein a limiting end (111) is arranged at one end of the accommodating groove (11) far away from the mounting groove (12), and a limiting portion (2114) matched with the limiting end (111) is arranged on the clamping piece (211) close to the limiting end (111).

10. A winding module, characterized by comprising the winding needle mechanism according to any one of claims 5-9, further comprising a second outer needle (3), a second inner needle (4) and a winding needle seat (5), wherein the second inner needle (4) is mounted on the second outer needle (3), and the first outer needle (1) and the second outer needle (3) are both mounted on the winding needle seat (5).