CN220233270U - Battery core winding needle and winding core device - Google Patents

Abstract

The utility model discloses a battery cell winding needle, which comprises: the needle comprises a needle handle, a needle body, a positioning piece and a fastening piece, wherein the needle handle is provided with a first accommodating hole, a positioning hole and a fixing hole, one end of the needle body is positioned in the first accommodating hole, the other end of the needle body is exposed out of the needle handle, the positioning hole and the fixing hole are communicated with the first accommodating hole, the positioning piece is detachably arranged in the positioning hole, and the positioning piece is abutted with one end of the needle body; the fastener can be dismantled and set up in the fixed orifices, and fastener butt needle body external surface makes the needle body be fixed in first accommodation hole. The utility model also discloses a winding core device. The needle body is pre-positioned through the positioning piece, the needle body is fixed through the fastening piece, in the using process, even if the needle body breaks, the needle body can be replaced only by taking out the fastening piece, the whole needle handle is not required to be detached, the efficiency is greatly improved, the needle handle can be used for multiple times, and the cost is reduced. In addition, the needle handle and the needle body do not need to be welded, so that the problems of deformation and scrapping of the needle body are avoided.

Description

Battery core winding needle and winding core device

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a battery core winding needle and a battery core winding device.

Background

For a winding type battery cell, the step of winding a pole piece, a diaphragm and a pole lug together is an indispensable link, and in practice, a needle winding device is required to be used for winding, wherein the needle winding device comprises a needle handle, a needle mouth and a needle body, the needle body is welded with the needle handle firstly, then the needle mouth is sleeved in, and finally the winding shaft is assembled together; the existing needle rolling equipment has the following defects: the needle body is directly welded with the needle handle, and when the needle body is deformed or broken after long-time use, the whole needle handle needs to be detached and replaced, so that a great deal of time and labor are consumed; in addition, the needle body is generally made of tungsten steel materials, has certain brittleness, can lead to the needle body to warp in the welding process, needs secondary correction afterwards, needs to polish after the welding, and easily leads to the broken scrapping of the needle body, so that the production cost is greatly increased.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a battery core winding needle and a battery core winding device.

The utility model discloses an electric core winding needle, which comprises: the needle comprises a needle handle, a needle body, a positioning piece and a fastening piece, wherein the needle handle is provided with a first accommodating hole, a positioning hole and a fixing hole, one end of the needle body is positioned in the first accommodating hole, the other end of the needle body is exposed out of the needle handle, the positioning hole and the fixing hole are communicated with the first accommodating hole, the positioning piece is detachably arranged in the positioning hole, and the positioning piece is abutted with one end of the needle body; the fastener can be dismantled and set up in the fixed orifices, and fastener butt needle body external surface makes the needle body be fixed in first accommodation hole.

According to an embodiment of the present utility model, the first accommodation hole is provided penetrating in the axial direction of the needle handle.

According to one embodiment of the utility model, one end of the needle handle has an inwardly concave guiding bevel.

According to one embodiment of the utility model, the positioning hole is arranged through the needle handle in the radial direction.

According to one embodiment of the utility model, the outer surface of the needle handle is provided with a fool-proof groove, and the fool-proof groove and the first accommodating hole are arranged in the same direction.

According to one embodiment of the utility model, the needle body is provided with a first step, a second step and a third step, the heights of the first step, the second step and the third step rise sequentially along the axial direction of the needle body, and the fixing hole is positioned on the third step and is abutted against the side wall of the third step.

According to one embodiment of the utility model, the needle body further comprises a fourth step, the fourth step is higher than the third step, and the fixing hole is located on the fourth step and abuts against the side wall of the fourth step.

According to one embodiment of the utility model, the needle comprises a needle handle, and the needle handle is positioned in the needle handle.

According to one embodiment of the utility model, the winding sleeve has a support surface which is arranged obliquely in the direction approaching the first step.

The utility model discloses a winding core device, which comprises: the two battery cell winding needles are oppositely arranged.

The utility model has the beneficial effects that: firstly insert the locating piece into the locating hole for the locating piece stretches into first accommodation hole, inserts the needle body into first accommodation hole again, and makes the one end butt of needle body to the locating piece, then, insert the fixed orifices with the fastener, and make the surface of fastener butt needle body, so, fix the needle body through the locating piece to the needle body in advance, the rethread fastener is fixed, in the use, even the fracture phenomenon appears in the needle body, only need take out the fastener and can carry out the needle body and change, need not to dismantle whole needle handle, efficiency is promoted greatly, and the needle handle can repetitious usage, be favorable to reduce cost. In addition, the needle handle and the needle body do not need to be welded, so that the problems of deformation and scrapping of the needle body are avoided.

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 application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a schematic perspective view of a battery cell winding needle;

FIG. 2 is a cross-sectional view of a cell winding needle;

fig. 3 is a schematic view of a part of the structure of the battery cell winding needle;

FIG. 4 is a schematic perspective view of a needle body;

FIG. 5 is a perspective view of the winding core device;

fig. 6 is a cross-sectional view of the core device.

Reference numerals illustrate:

1-a needle handle; 11-a first receiving hole; 12-positioning holes; 13-fixing holes; 14-guiding inclined plane; 15-a fool-proof groove;

2-a needle body; 21-a first step; 22-a second step; 23-a third step; 24-fourth step;

3-positioning pieces;

4-a fastener;

5-winding the sleeve; 51-a second receiving hole; 52-a supporting surface; 53-avoidance holes.

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 purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the utility model solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. 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.

Example 1

As shown in fig. 1-2, fig. 1 is a schematic perspective view of a battery cell winding needle; fig. 2 is a cross-sectional view of a cell winding needle. The battery core winding needle comprises a needle handle 1, a needle body 2, a positioning piece 3 and a fastening piece 4, wherein a part of the needle body 2 is positioned in the needle handle 1, and the other part of the needle body 2 is exposed out of the needle handle 1; when the needle body 2 is placed, the positioning piece 3 is connected with the needle handle 1, after the needle body 2 is placed in the needle handle 1, one end of the needle body 2 is abutted to the positioning piece 3, the limiting position of the needle body 2 placed in the needle handle 1 is limited by the positioning piece 3, then the fastening piece 4 is also placed in the needle handle 1, the fastening piece 4 is abutted to the needle body 2, and the movement of the needle body 2 is limited by the fastening piece 4, so that the needle body 2 is in a static state relative to the needle handle 1; in addition, in order to facilitate the installation and the disassembly of the needle body 2, the positioning piece 3 and the fastening piece 4 are detachably connected with the needle handle 1.

Referring to fig. 3 again, fig. 3 is a schematic view of a part of the structure of the cell winding needle. The needle handle 1 is provided with a first accommodating hole 11, a positioning hole 12 and a fixing hole 13, the first accommodating hole 11 is axially formed along the needle handle 1, the needle body 2 is positioned in the first accommodating hole 11, the positioning hole 12 and the fixing hole 13 are formed along the radial direction (width), the positioning hole 12 and the fixing hole 13 are communicated with the first accommodating hole 11, the positioning piece 3 is positioned in the positioning hole 12, and the fastening piece 4 is positioned in the fixing hole 13. In this embodiment, the first accommodating hole 11 is formed to penetrate through the needle handle 1 along the axial direction, so that the needle body 2 is pushed out from two ends, and the subsequent disassembly and replacement are facilitated. The positioning hole 12 and the fixing hole 13 are disposed perpendicular to the first accommodation hole 11, and the fixing hole 13 and the positioning hole 12 are disposed in tandem in the axial direction, wherein the exposed end near the needle body 2 is set to be "front", and the opposite is set to be "rear". Specifically, the positioning hole 12 is formed through the first accommodating hole 11 in the radial direction, so that the positioning piece 3 can be more accurately inserted into the positioning hole 12, meanwhile, the perpendicularity of the positioning piece 3 is guaranteed, and the positioning accuracy of the needle body 2 is further improved. In this embodiment, the positioning element 3 and the fastening element 4 are bolts, and corresponding threaded structures are formed in the positioning hole 12 and the fixing hole 13, so that the positioning element 3 and the fastening element 4 can be conveniently screwed in and screwed out. Further, the front section of the needle handle 1 is provided with a guiding inclined plane 14, wherein the guiding inclined plane 14 is provided in an inward concave form, and the inward concave refers to that the end face of the needle handle 1 is contracted towards the direction close to the positioning hole 12, and the guiding inclined plane 14 plays a guiding role when the needle body 2 is inserted, so that the needle body 2 is inserted into the first accommodating hole 11 more quickly and accurately. Furthermore, the needle handle 1 is further provided with a foolproof groove 15, the foolproof groove 15 is axially arranged along the needle handle 1, the direction can be rapidly identified through the foolproof groove 15, and the phenomenon that the needle body 2 is damaged due to the fact that the placement direction is not opposite when in use is avoided.

Referring again to fig. 4, fig. 4 is a schematic perspective view of the needle body 2. The needle body 2 is provided with a first step 21, a second step 22 and a third step 23, the heights of the first step 21, the second step 22 and the third step 23 gradually increase along the axial direction of the needle body 2, that is, the height of the second step 22 is higher than that of the first step 21, the height of the third step 23 is higher than that of the second step 22, the fastening piece 4 is positioned at the position of the third step 23, and the fastening piece 4 is abutted with the side wall of the third step 23 far away from the first step 21, so that the needle body 2 is fixed. The needle body 2 in this embodiment further has a fourth step 24, the fourth step 24 is higher than the third step 23, the fixing hole 13 corresponds to the position of the fourth step 24 when the needle body 2 is inserted into the first accommodating hole 11, the fastener 4 is screwed in and located at the fourth step 24, and it abuts against the side wall of the fourth step 24. Preferably, in order to avoid damage to the needle body 2 and increase the contact area between the fastener 4 and the needle body 2, one end of the fastener 4 is a plane, and the plane end is matched with the surface of the fourth step 24, that is, after the fastener 4 is screwed in, the end surface of the fastener 4 and the surface of the fourth step 24 achieve surface-to-surface contact, and the side wall of the fastener 4 is abutted with the side wall of the fourth step 24, so that the fixing effect on the needle body 2 is greatly increased. In another embodiment, in order to increase the service life of the needle body 2, a teflon layer may be further added on the surface of the needle body 2, so as to improve the wear resistance of the needle body.

The battery core winding needle in the embodiment further comprises a winding sleeve 5, the winding sleeve 5 is provided with a second accommodating hole 51, and the winding sleeve 5 can be sleeved on the outer surface of the needle handle 1 through the arrangement of the second accommodating hole 51, so that the stability of the needle handle 1 during working is improved, and the phenomenon of deflection is prevented. In addition, the winding sleeve 5 is further provided with a supporting surface 52, the supporting surface 52 is arranged at the end part of the winding sleeve 5, which is close to the first step 21, and the supporting surface 52 is an inclined surface, wherein the supporting surface 52 is inclined towards the direction, which is close to the needle body 2, and the supporting surface 52 is beneficial to providing support for the tab during winding, so that the problem of tab collapse is avoided. Furthermore, the winding sleeve 5 is further provided with a clearance hole 53, the clearance hole 53 corresponds to the fixing hole 13 in position, and the clearance hole 53 is provided with a region larger than the diameter of the fixing hole 13, so that the fastener 4 can be conveniently screwed in or screwed out subsequently.

When the needle body 2 is mounted, the positioning piece 3 is screwed into the positioning hole 12 and penetrates through the first accommodating hole 11, then the needle body 2 is inserted into the first accommodating hole 11, and the fastening piece 4 is screwed into the fixing hole 13, so that the needle body 2 is fixed.

When the breakage of the needle body 2 occurs in the first step 21 and the second step 22, the first step 21 and the second step 22 are both located outside the needle handle 1, so that the whole needle body 2 can be taken out only by unscrewing the fastener 4.

When the breakage of the needle body 2 occurs in the third step 23 and the fourth step 24, since the third step 23 and the fourth step 24 are both located in the needle handle 1, at this time, the positioning member 3 and the fastening member 4 need to be screwed out and then extend into the other needle body 2 from the rear end, so that the broken needle body 2 is completely pushed out of the first accommodating hole 11.

To sum up, firstly insert setting element 3 into locating hole 12 for setting element 3 stretches into in the first accommodation hole 11, again insert needle body 2 to in the first accommodation hole 11, and make the one end butt of needle body 2 to setting element 3, afterwards, insert fastener 4 in fixed orifices 13, and make fastener 4 butt needle body 2's surface, so, fix needle body 2 through setting element 3 in advance, rethread fastener 4, in the use, even if the fracture phenomenon appears in needle body 2, only need take out fastener 4 and can carry out needle body 2 and change, need not to dismantle whole needle handle 1, efficiency is promoted greatly, needle handle 1 can repetitious usage moreover, be favorable to the cost is reduced. In addition, the needle handle 1 and the needle body 2 do not need to be welded, so that the problems of deformation and scrapping of the needle body 2 are avoided.

Example two

As shown in fig. 5 and 6, fig. 5 is a perspective view of the winding core device; fig. 6 is a cross-sectional view of the core device. The core device of this application includes two relative electric core winding needles that set up, rolls up the needle synchronous rotation through two electric cores and realizes the coil stock, simultaneously, two electric cores roll reverse setting of needle, and the slow-witted groove 15 orientation of preventing of needle is rolled up to electric core promptly, and the slow-witted groove 15 orientation of preventing of needle is rolled up to another electric core. The battery core winding needle in this embodiment adopts the structure of the first embodiment, and will not be described here again. Setting two electric core winding needles as a first electric core winding needle and a second electric core winding needle respectively, wherein one end of a needle body 2 of the first electric core winding needle extends into a first accommodating hole 11 of the second electric core winding needle, and similarly, the needle body 2 of the second electric core winding needle also extends into the first accommodating hole 11 of the first electric core winding needle; specifically, the first step 21 of the first cell winding needle extends into the first accommodating hole 11 of the second cell winding needle and is also in contact with the third step 23 of the second cell winding needle, the second step 22 of the first cell winding needle is opposite to the second step 22 of the second cell winding needle, a gap exists between the two steps, and the area of the winding material is located at the two second steps 22; when the coiling is completed, the two electric core coiling needles need to withdraw the needles so as to be convenient for blanking, at the moment, the height of the first step 21 is smaller than that of the second step 22, and the height is changed from large to small when the needles are withdrawn, so that the resistance of needle withdrawal can be reduced, and the needle withdrawal efficiency is improved.

The foregoing description is only illustrative of the utility model and is not to be construed as limiting the 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 (10)

1. A battery cell winding needle, comprising: needle handle (1), needle body (2), setting element (3) and fastener (4), needle handle (1) have first accommodation hole (11), locating hole (12) and fixed orifices (13), needle body (2) one end is located in first accommodation hole (11), needle body (2) other end expose in outside needle handle (1), locating hole (12) with fixed orifices (13) all with first accommodation hole (11) intercommunication, setting element (3) detachable set up in locating hole (12), just setting element (3) with needle body (2) one end butt; the fastener (4) is detachably arranged in the fixing hole (13), and the fastener (4) abuts against the outer surface of the needle body (2) so that the needle body (2) is fixed in the first accommodating hole (11).

2. The cell winding needle according to claim 1, characterized in that the first receiving hole (11) is provided penetrating in the axial direction of the needle handle (1).

3. The cell winding needle according to claim 1, characterized in that one end of the needle handle (1) has an inwardly recessed guiding bevel (14).

4. The cell winding needle according to claim 2, characterized in that the positioning hole (12) is arranged through the needle handle (1) in the radial direction.

5. The battery cell winding needle according to claim 2, wherein the outer surface of the needle handle (1) is provided with a fool-proof groove (15), and the fool-proof groove (15) and the first accommodating hole (11) are arranged in the same direction.

6. The battery cell winding needle according to any one of claims 1 to 5, wherein the needle body (2) is provided with a first step (21), a second step (22) and a third step (23), the heights of the first step (21), the second step (22) and the third step (23) are sequentially increased along the axial direction of the needle body (2), and the fixing hole (13) is positioned on the third step (23) and is abutted against the side wall of the third step (23).

7. The cell winding needle according to claim 6, characterized in that the needle body (2) further has a fourth step (24), the fourth step (24) is higher than the third step (23), and the fixing hole (13) is located at the fourth step (24) and abuts against a side wall of the fourth step (24).

8. The battery cell winding needle according to claim 6, further comprising a winding sleeve (5), wherein the winding sleeve (5) is provided with a second accommodating hole (51), and the needle handle (1) is positioned in the second accommodating hole (51).

9. The cell winding needle according to claim 8, characterized in that the winding sleeve (5) has a supporting surface (52), the supporting surface (52) being arranged obliquely in a direction approaching the first step (21).

10. A core winding device, characterized by comprising two core winding pins according to any one of claims 1-9, the two core winding pins being arranged opposite each other.