CN210576164U

CN210576164U - Winding needle for winding diaphragm

Info

Publication number: CN210576164U
Application number: CN201921485537.6U
Authority: CN
Inventors: 曹海霞; 杨琪; 杨展鹏
Original assignee: Zhuhai Higrand Technology Co Ltd
Current assignee: Zhuhai Higrand Technology Co Ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-05-19
Anticipated expiration: 2029-09-06

Abstract

The utility model discloses a coiling diaphragm is with rolling up needle, be relative first book needle and the second that sets up including the syringe needle and roll up the needle, first book needle and second are rolled up the needle and are all included fixed part and winding part, winding part includes by point portion to root first stair structure and second stair structure, first stair structure includes first step face, second stair structure includes the second step face, two first step faces are parallel to each other and have the clearance, the second step face of first book needle is parallel to each other and can laminate with the first step face of second book needle, the first step face of first book needle is parallel to each other and can laminate with the second step face of second book needle, form the centre gripping chamber between two first step faces after two sets of second step faces and the first step face realize laminating. The first winding needle and the second winding needle are withdrawn in opposite directions, and the friction forces on two sides of the diaphragm are mutually offset, so that the stress balance of the inner-layer diaphragm is ensured, and the core pulling of the battery core is avoided. Meanwhile, the first winding needle and the second winding needle are attached to form a whole, so that the rigidity of the whole is increased.

Description

Winding needle for winding diaphragm

Technical Field

The utility model relates to a diaphragm coiling technical field, in particular to coiling diaphragm is with rolling up needle.

Background

In the existing winding needle for winding the diaphragm, after the winding needle finishes the winding of the diaphragm, most of the winding needles finish the needle drawing in a single-side needle drawing mode, namely, the needle inserting and the needle drawing are realized by two mutually matched winding needles at the same side. After the winding is finished, the innermost layer of the battery core is provided with a layer of winding diaphragm. The unilateral needle of loosing is drawn and is made the roll-up diaphragm receive unilateral frictional force, and then makes the inlayer diaphragm be pulled easily to cause the phenomenon of electric core loosing core to take place. Therefore, the manufacturing quality of the battery cell is seriously influenced.

And the septum is clamped between the two winding needles. In order to conveniently clamp the diaphragm, a gap is generally kept between the tip parts of the two winding needles, so that the problem of insufficient rigidity of the tip parts of the winding needles exists, and the deformation may occur in the process of winding the diaphragm, thereby affecting the manufacturing quality of the battery cell.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a coiling diaphragm is with rolling up needle to solve the problem that proposes among the above-mentioned background art.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a roll up diaphragm with rolling up needle, includes that first book needle and second roll up the needle, first needle head of rolling up needle and second roll up the needle is relative setting, first book needle and second roll up the needle and all include fixed part and winding part, winding part is ladder structure and includes first ladder structure and second ladder structure by sharp portion to the root, first ladder structure includes first ladder face, second ladder structure includes second ladder face, two be parallel to each other between the first ladder face and have the clearance, be parallel to each other and can laminate between the first ladder face of needle is rolled up to first ladder face of rolling up the needle and second, be parallel to each other and can laminate between the first ladder face of needle is rolled up to first ladder face and second, form the centre gripping chamber between two first ladder faces after two sets of second ladder faces and the first ladder face realize laminating.

As an improvement of the above scheme, the first winding needle and the second winding needle have the same structure.

As an improvement of the scheme, the end of the first stepped structure forms a sharp-angled structure.

As an improvement of the above scheme, the winding device further comprises a first winding needle shaft and a second winding needle shaft, wherein the first winding needle and the second winding needle are respectively mounted on the first winding needle shaft and the second winding needle shaft, the rotation center lines of the first winding needle shaft, the second winding needle shaft, the first winding needle and the second winding needle are overlapped, and both the first winding needle shaft and the second winding needle shaft can rotate around the rotation center line and can reciprocate along the rotation center line.

As an improvement of the above scheme, the fixing portion is provided with a threaded hole, and the first winding needle and the second winding needle are detachably connected to the first winding needle shaft and the second winding needle shaft through screws respectively.

Has the advantages that: the utility model discloses in, the needle is rolled up to the first needle of rolling up and the second forms that the syringe needle is relative, accomplishes electric core preparation back, can realize that first needle and the second of rolling up rolls up the reverse of needle and moves back the needle. The two sides of the inner-layer diaphragm positioned on the battery cell are respectively subjected to friction forces in opposite directions, the friction forces are mutually offset, the stress balance of the inner-layer diaphragm is ensured, the core-pulling phenomenon of the battery cell caused by uneven stress of the diaphragm is avoided, and the manufacturing quality of the battery cell is further ensured. Simultaneously, after the first rolling needle and the second rolling needle clamp the diaphragm, the first step surface of one rolling needle can be attached to the second step surface of the other rolling needle. Therefore, after the first winding needle and the second winding needle clamp the diaphragm, the two sides of the diaphragm can be attached to form a whole, so that the rigidity of the whole is greatly increased, and the deformation of the winding needle in the process of winding the diaphragm is reduced.

Drawings

The invention is further described with reference to the following figures and examples:

FIG. 1 is a schematic perspective view of a first winding needle or a second winding needle;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic view of the engagement of the first winding pin and the second winding pin;

fig. 4 is a schematic view of the overall structure of a winding head device according to an embodiment of the present invention.

Detailed Description

Referring to fig. 4, for the embodiment of the present invention, a winding head device is integrally installed on the frame 1, and is located at a winding station, for realizing winding of the diaphragm. Specifically, the winding head device mainly comprises a first reel shaft sleeve 10, a second reel shaft sleeve 20, a first reel needle shaft 30, a second reel needle shaft 40, a first reel needle 50, a second reel needle 60, a first needle feeding mechanism, a second needle feeding mechanism, a driving module and the like. The working mode is a front-back needle drawing type.

Specifically, the first spool sleeve 10 and the second spool sleeve 20 are connected with a driving module, and the driving module can drive the first spool sleeve 10 and the second spool sleeve 20 to rotate synchronously. The first spool sleeve 10 and the second spool sleeve 20 rotate synchronously, i.e. the rotation speed and the rotation direction of the two spool sleeves are consistent. The first needle winding shaft 30 and the first reel shaft sleeve 10 are sleeved with each other and synchronously rotate, and the second needle winding shaft 40 and the second reel shaft sleeve 20 are sleeved with each other and synchronously rotate. The mode of concrete accessible key-type connection realizes cup jointing of book needle axle and axle sleeve, and the epaxial bar key that sets up of book needle sets up the bar groove that supplies the bar key embedding in the axle sleeve, and bar key and bar groove cooperation joint satisfy the bar key simultaneously and can be at bar inslot reciprocating motion.

The first needle feeding mechanism is connected with the first needle winding shaft 30 to drive the first needle winding shaft 30 to reciprocate along the axis of the first needle winding shaft sleeve 10; the second needle winding shaft 40 is connected with a second needle feeding mechanism to drive the second needle winding shaft 40 to reciprocate along the axis of the second reel shaft sleeve 20; the first needle winding shaft 30 is fixedly provided with a first needle winding 50, the second needle winding shaft 40 is fixedly provided with a second needle winding 60, needle heads of the first needle winding 50 and the second needle winding 60 are oppositely arranged, and the rotating center lines of the first needle winding shaft 30, the second needle winding shaft 40, the first needle winding 50 and the second needle winding 60 are superposed. The first needle feeding mechanism and the second needle feeding mechanism provide power simultaneously to realize needle insertion and needle drawing.

The first needle feeding mechanism and the second needle feeding mechanism are both screw modules, and the screw modules are mounted on the rack 1 and used for driving the first needle winding shaft 30 or the second needle winding shaft 40 to reciprocate so as to realize the actions of needle inserting and needle withdrawing.

The specific working steps are as follows:

1. the first needle feeding mechanism drives the first winding needle shaft 30 to move axially forwards along the first winding shaft sleeve 10 until the first winding needle 50 reaches the winding station and is positioned on one side of the diaphragm; the second needle feeding mechanism drives the second needle winding shaft 40 to move axially forwards along the second reel shaft sleeve 20 until the second needle winding 60 reaches the winding station and is positioned at the other side of the diaphragm; the first winding needle 50 and the second winding needle 60 form a state of clamping the septum.

2. The driving mechanism drives the first reel sleeve 10 and the second reel sleeve 20 to synchronously rotate, and at the moment, the first winding needle 50 and the second winding needle 60 synchronously rotate along with the first reel sleeve and the second reel sleeve, so that the winding of the diaphragm is realized.

3. After winding is completed, the first needle feeding mechanism drives the first winding needle shaft 30 to move backwards along the axial direction of the first winding shaft sleeve 10 until the first winding needle 50 is completely drawn out of the battery core; the second needle feeding mechanism drives the second needle winding shaft 40 to move axially and backwards along the second reel shaft sleeve 20 until the second needle winding 60 completely withdraws the battery core.

In the winding head device, the first winding needle 50 and the second winding needle 60 are arranged in a mode that needle points are opposite, and after the cell is manufactured by using the winding head device, the first winding needle 50 and the second winding needle 60 can be reversely withdrawn by driving the first needle feeding mechanism and the second needle feeding mechanism. The two sides of the inner-layer diaphragm positioned on the battery cell are respectively subjected to friction forces in opposite directions, the friction forces are mutually offset, the stress balance of the inner-layer diaphragm is ensured, the core-pulling phenomenon of the battery cell caused by uneven stress of the diaphragm is avoided, and the manufacturing quality of the battery cell is further ensured.

Meanwhile, referring to fig. 1 to 3, each of the first winding needle 50 and the second winding needle 60 includes a fixing portion 51 and a winding portion 52, the fixing portion 51 is provided with a threaded hole 511, and the first winding needle 50 and the second winding needle 60 are respectively fixedly mounted on the first winding needle shaft 30 and the second winding needle shaft 40 through screws, so as to be conveniently detached. Meanwhile, the winding portion 52 is a stepped structure including a first stepped structure 521 and a second stepped structure 522 from a tip portion to a root portion of the winding pin, the first stepped structure 521 includes a first stepped surface 5211, and the second stepped structure 522 includes a second stepped surface 5221. After the first winding needle 50 and the second winding needle 60 are preliminarily angularly adjusted, the two first step surfaces 5211 are parallel to each other and have a gap, the second step surface 5221 of the first winding needle 50 is parallel to the first step surface 5211 of the second winding needle 60, and the first step surface 5211 of the first winding needle 50 is parallel to the second step surface 5221 of the second winding needle 60. When the first winding needle 50 and the second winding needle 60 are relatively moved to be completely in the needle-out state, the two sets of second step surfaces 5221 and the first step surfaces 5211 are attached to each other. And further, the rigidity of the first winding needle 50 and the second winding needle 60 after being matched with each other is increased, and the winding effect of the diaphragm is ensured. A clamping chamber is formed between the two first stepped surfaces 5211, and the diaphragm is located in the clamping chamber to be wound.

After the first winding needle 50 and the second winding needle 60 sandwich the septum, the first step surface 5211 of one winding needle can be attached to the second step surface 5221 of the other winding needle. Thus, the first winding needle 50 and

after the second winding needle 60 clamps the diaphragm, the two sides of the diaphragm can be attached to each other to form a whole, so that the rigidity of the whole is greatly increased, and the deformation of the winding needle in the diaphragm winding process is reduced.

For ease of manufacture, the first winding pin 50 and the second winding pin 60 are designed in the same configuration. First stair structure 521 and second stair structure 522 are the arc structure, and two book needles match each other the back, and first stair structure 521 and second stair structure 522 paste each other and form a complete circular structure.

In order to avoid the first needle 50 and the second needle 60 from interfering with each other during the docking process, the end of the first stepped structure 521 forms a pointed structure 523.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. A winding needle for winding a separator, characterized in that: roll up the needle including first book needle and second, first needle head of rolling up the needle and second and being relative setting, first book needle and second are rolled up the needle and are all including fixed part and winding part, winding part is stair structure and includes first stair structure and second stair structure by sharp portion to the root, first stair structure includes first stair face, second stair structure includes second stair face, two be parallel to each other between the first stair face and there is the clearance, first second stair face of rolling up the needle is parallel to each other and can laminate with the second between the first stair face of needle, first stair face of rolling up the needle is parallel to each other and can laminate with the second between the second stair face of second rolling up the needle, forms the centre gripping chamber between two first stair faces after two sets of second stair faces and the first stair face realize laminating.

2. The winding needle for winding a septum according to claim 1, characterized in that: the first winding needle and the second winding needle have the same structure.

3. The winding needle for winding a septum according to claim 2, characterized in that: the tail end of the first stepped structure forms a sharp-angled structure.

4. The winding needle for winding a septum according to claim 1, characterized in that: still include first book needle axle and second book needle axle, first book needle with the second book needle install respectively in first book needle axle with on the second book needle axle, first book needle axle, the second book needle axle, first book needle and the coincidence of the rotation center line of second book needle, first book needle axle and second book needle axle all can rotate around rotation center line and along rotation center line reciprocating motion.

5. The winding needle for winding a septum according to claim 4, characterized in that: the fixing part is provided with a threaded hole, and the first winding needle and the second winding needle are detachably connected to the first winding needle shaft and the second winding needle shaft through screws respectively.