CN211569758U - Battery diaphragm coiling mechanism - Google Patents
Battery diaphragm coiling mechanism Download PDFInfo
- Publication number
- CN211569758U CN211569758U CN201922402745.1U CN201922402745U CN211569758U CN 211569758 U CN211569758 U CN 211569758U CN 201922402745 U CN201922402745 U CN 201922402745U CN 211569758 U CN211569758 U CN 211569758U
- Authority
- CN
- China
- Prior art keywords
- core
- rolling
- elastic strip
- strip
- elastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Primary Cells (AREA)
Abstract
The utility model discloses a battery diaphragm winding device, which comprises a winding core, wherein the winding core is of a cylindrical structure, the outer edge of the winding core is provided with a plurality of elastic strips which are arranged in parallel with the axis of the winding core, and a plurality of elastic strips are arranged in parallel, the length of the elastic strips is not less than that of the winding core, adjacent elastic strips are arranged between the elastic strips to form an elastic strip interval for accommodating a battery diaphragm, one side of the elastic strips, which is far away from the winding core, is of an arc-shaped structure, a plurality of elastic strips are arranged outside the winding core, and a contraction space is formed between the elastic strips and the winding core through the arc-shaped structure provided with the elastic strips, so that after winding, the internal stress generated by the winding diaphragm can be absorbed through the deformation of the elastic strips and the compression to the contraction space, and the problem of the battery diaphragm damage caused by the internal stress of the battery diaphragm is avoided, the yield of the battery diaphragm is improved.
Description
Technical Field
The utility model relates to a diaphragm coiling mechanism technical field specifically is a battery diaphragm coiling mechanism.
Background
The lithium battery diaphragm is a specially-formed polymer film, the film has a microporous structure, and in the lithium battery, the microporous film effectively isolates the positive electrode and the negative electrode of the lithium battery, and can allow lithium ions to freely pass through and generate an oxidation-reduction reaction with electrons, so that the free charge and discharge of the lithium battery are realized.
However, the characteristic of the microporous membrane of the lithium battery cannot be recovered after the microporous membrane is stretched and deformed, so that the microporous membrane product of the lithium battery has obvious later-stage changes (waves, vertical edges and arcs); the lithium battery diaphragm is manufactured and collected in a coiling mode, when the lithium battery diaphragm is coiled, certain internal stress exists in a coil after the diaphragm is coiled due to the thickness inconsistency and the coiling tension difference of the diaphragm, the internal stress cannot be released for a long time, the diaphragm cannot be restored and deformed, the wavy lines appear on the surface of the diaphragm or the edge part of the diaphragm is in a sagging phenomenon after the diaphragm is unfolded, so that the positive electrode and the negative electrode of the lithium battery cannot be completely isolated, and the short circuit phenomenon appears; this late-stage variation phenomenon seriously affects the yield of the microporous membrane product of the lithium battery.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a battery diaphragm coiling mechanism to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a battery diaphragm coiling mechanism, includes that the rolling rolls up the core, the rolling rolls up the core and is cylindrical structure, the outer fringe that the rolling rolled up the core be equipped with a plurality ofly with the axis parallel arrangement's that the rolling rolled up the core elasticity strip, it is a plurality of elasticity strip parallel arrangement, the length of elasticity strip is not less than the length that the rolling rolled up the core, it is adjacent form the elasticity strip interval that is used for holding the battery diaphragm between the elasticity strip, the elasticity strip is kept away from one side that the rolling rolled up the core is the arc structure.
As a further aspect of the present invention: the winding core cylinder structure is characterized in that a hollow cylinder which is coaxial with the winding core is arranged in the winding core.
As a further aspect of the present invention: the elastic strips are distributed on the periphery of the winding core.
As a further aspect of the present invention: the elastic strip is fixedly connected with the winding core, and the length of the elastic strip is the same as that of the winding core.
As a further aspect of the present invention: the elastic strip comprises an elastic strip main body, and the elastic strip main body is fixedly connected with the winding core.
As a further aspect of the present invention: one side that the roll core was rolled up to the rolling is kept away from to elasticity strip main part is equipped with the outer cambered surface of elasticity strip, the both ends of the outer cambered surface of elasticity strip are to being close to the direction that the roll core was rolled up in the rolling extends.
As a further aspect of the present invention: the elastic strip main body is provided with an elastic strip inner arc surface on one side of the winding core fixed connection, the elastic strip inner arc surface is located on two sides of the winding core connection surface, and the elastic strip inner arc surface extends towards the direction far away from the winding core.
Compared with the prior art, the beneficial effects of the utility model are that:
1. according to the winding device, the plurality of elastic strips are arranged on the outer side of the winding core, and the arc-shaped structure of the elastic strips is arranged, so that a contraction space is formed between the elastic strips and the winding core, and therefore after winding, the internal stress generated by the wound diaphragm can be absorbed through the deformation of the elastic strips and the compression to the contraction space, the problem that the battery diaphragm is damaged due to the internal stress of the battery diaphragm is avoided, and the yield of the battery diaphragm is improved;
2. this application elasticity strip is evenly arranged, forms certain compartment between the elasticity strip, through the interval between the adjacent elasticity strip, can absorb the deformation of the battery diaphragm after the rolling, releases the rolling and the battery diaphragm internal stress that produces, for batching the diaphragm provides abundant internal stress release space, effectively improved the lithium battery diaphragm later stage change problem that batches the diaphragm internal stress and arouse, promoted the yield of lithium battery diaphragm goods greatly, effectively reduced manufacturing cost.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
FIG. 2 is a top view of the present embodiment;
fig. 3 is a schematic structural diagram of the present embodiment.
In the figure: 1-winding core, 2-elastic strip interval, 3-elastic strip, 31-elastic strip main body, 32-elastic strip extrados surface and 33-elastic strip intrados surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-3, in an embodiment of the present invention, a battery separator winding apparatus includes a winding core 1 and an elastic strip 3 fixedly connected to and surrounding the winding core 1.
The winding core 1 is of a cylindrical structure, and the winding core 1 is internally provided with a hollow cylinder which is coaxially arranged with the winding core 1, so that the winding core 1 is of a cylindrical structure.
The elastic strips 3 are arranged in a plurality, the elastic strips 3 are fixedly connected to the periphery of the winding core 1, the elastic strips 3 are arranged in parallel with the axis of the winding core 1, all the elastic strips 3 are arranged in parallel, the length of each elastic strip 3 is not less than that of the winding core 1, in the embodiment, the length of each elastic strip 3 is the same as that of the winding core 1, an elastic strip interval 2 for accommodating a battery diaphragm is formed between every two adjacent elastic strips 3, an accommodating space formed by the elastic strip intervals 2 becomes a stress release space of the battery diaphragm in the winding process, in addition, each elastic strip 3 comprises an elastic strip main body 31 fixedly connected with the winding core 1, one end, far away from the winding core 1, of each elastic strip main body 31 is provided with an elastic strip outer arc surface 32, the circle center of each elastic strip outer arc surface 32 is positioned at one side close to the winding core 1, so that the direction of each elastic strip outer arc surface 32 is consistent with the arc surface direction of the, in addition, be connected face both sides at elasticity strip main part 31 and rolling core 1 and all be equipped with elasticity strip extrados 32, elasticity strip main part 31 both sides are through forming a shrink space between elasticity strip extrados 32 and the rolling core 1, after the rolling, the battery diaphragm can produce the shrink trend under the effect of internal stress, therefore can extrude elasticity strip main part 31, elasticity strip main part 31 is to this shrink space internal compression, and then can release the internal stress that the rolling back battery diaphragm produced.
The utility model discloses when using, it is 172mm to roll up the core external diameter, and the attached material of elasticity is ethylene-propylene-diene monomer foam material, and the attached material specification of elasticity is: the width is 20mm, and the height is 5 mm; the attached quantity of the attached material of elasticity is 14 every rolls up the core (the even interval is attached on the rolling core), and it is attached with gluing: 3M double faced adhesive tape 20mm wide;
batch the diaphragm material and be two drawing PE of wet process, thickness specification is 9um, produces the line production speed and is 39.5m/min, and rolling tension is 19N, and the rolling tapering is-50%, rolls up through paper roll core and this embodiment core and rolls up the diaphragm quality after the rolling and test, and the result is as shown in following table 1:
TABLE 1
| Winding core | Paper roll core | Paper roll core attached with elastic material |
| Coiled material | Wet-process double-drawing PE diaphragm | Wet-process double-drawing PE diaphragm |
| Thickness specification of coiled material | 9um | 9um |
| Winding tension | 19N | 19N |
| Production speed of production line | 39.5m/min | 39.5m/min |
| Rolling taper | -50％ | -50％ |
| Ratio of scrapped diaphragm product in later period change | 12.1％ | 0.9％ |
As can be seen from the table 1, the scrapping percentage of the membrane product in the later period of change by using the rolling device of the embodiment is reduced from 12.1% to 0.9%, and the yield of the wet-process double-drawing membrane product is greatly improved.
Example 2
The winding device of this example is the same as example 1.
This embodiment is at the in-process that uses, and it is 172mm to roll up the core external diameter, and elasticity attached material is ethylene propylene diene monomer expanded material, and elasticity attached material is: the width is 20mm, and the height is 5 mm; the attached quantity of the attached material of elasticity is 14 every rolls up the core (the even interval is attached on the rolling core), and it is attached with gluing: 3M double faced adhesive tape 20mm wide;
batch the diaphragm material and for wet process double-draw PE diaphragm, thickness specification is 9um, and coating thickness is 3mm, and coating production speed is 35m/min, and rolling tension is 11N, rolls up the diaphragm quality after the core carries out the rolling and tests the rolling through paper roll core and this embodiment, and the result is as shown in following table 2:
TABLE 2
As can be seen from the table 2, the scrapping percentage of the diaphragm product after being changed by using the winding device of the embodiment is reduced to 1.2% from 9.3%, and the yield of the wet-process double-drawing diaphragm coating film product is greatly improved.
Example 3
The winding device of this example is the same as example 1.
This embodiment is at the in-process that uses, and it is 172mm to roll up the core external diameter, and elasticity attached material is ethylene propylene diene monomer expanded material, and elasticity attached material is: the width is 20mm, and the height is 5 mm; the attached quantity of the attached material of elasticity is 14 every rolls up the core (the even interval is attached on the rolling core), and it is attached with gluing: 3M double faced adhesive tape 20mm wide;
batch the diaphragm material and be dry process PE diaphragm, thickness specification is 16um, and coating thickness is 4mm, and coating production speed is 35m/min, and rolling tension is 13N, rolls up the core through paper roll and this embodiment and carries out the rolling and test the diaphragm quality after the rolling, and the result is as shown in following table 2:
table 2.
| Winding core | Paper roll core | Paper roll core attached with elastic material |
| Coiled material | Dry-process PE (polyethylene) diaphragm coating film | Dry-process PE (polyethylene) diaphragm coating film |
| Thickness specification of diaphragm material | 16um | 16um |
| Thickness specification of coiled material | 20um | 20um |
| Winding tension | 13N | 13N |
| Production speed of production line | 35m/min | 35m/min |
| Ratio of scrapped diaphragm product in later period change | 6.2％ | 0.6％ |
As can be seen from the example 3, the scrapping percentage of the membrane product in the later period of change by using the winding device of the embodiment is reduced from 6.2% to 0.6%, and the yield of the dry PE membrane coated membrane product is greatly improved
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides a battery diaphragm coiling mechanism, includes that the rolling rolls up core (1), its characterized in that, the rolling rolls up core (1) and is cylindrical structure, the outer fringe of rolling core (1) be equipped with a plurality ofly with the axis parallel arrangement's of rolling core (1) elasticity strip (3), a plurality of elasticity strip (3) parallel arrangement, the length of elasticity strip (3) is not less than the length of rolling core (1), it is adjacent form between elasticity strip (3) and be used for holding battery diaphragm elasticity strip interval (2), elasticity strip (3) are kept away from one side of rolling core (1) is the arc structure.
2. The battery separator rolling device according to claim 1, wherein the rolling core (1) is of a cylindrical structure, and a hollow cylinder arranged coaxially with the rolling core (1) is arranged in the rolling core (1).
3. The battery separator winding device according to claim 1, characterized in that a plurality of elastic strips (3) are arranged around the periphery of the winding core (1).
4. The battery separator rolling device according to claim 1, wherein the elastic strip (3) is fixedly connected with the rolling core (1), and the length of the elastic strip (3) is the same as that of the rolling core (1).
5. The battery separator winding device according to claim 1, characterized in that the elastic strip (3) comprises an elastic strip body (31), and the elastic strip body (31) is fixedly connected with the winding core (1).
6. The battery separator rolling device according to claim 5, wherein an elastic strip outer arc surface (32) is arranged on one side of the elastic strip main body (31) far away from the rolling core (1), and two ends of the elastic strip outer arc surface (32) extend towards the direction close to the rolling core (1).
7. The battery separator rolling device according to claim 5, wherein an elastic strip inner arc surface (33) is arranged on one side of the elastic strip main body (31) fixedly connected with the rolling core (1), the elastic strip inner arc surface (33) is positioned on two sides of the connection surface of the elastic strip main body (31) and the rolling core (1), and the elastic strip inner arc surface (33) extends towards the direction away from the rolling core (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922402745.1U CN211569758U (en) | 2019-12-27 | 2019-12-27 | Battery diaphragm coiling mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922402745.1U CN211569758U (en) | 2019-12-27 | 2019-12-27 | Battery diaphragm coiling mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211569758U true CN211569758U (en) | 2020-09-25 |
Family
ID=72551664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922402745.1U Active CN211569758U (en) | 2019-12-27 | 2019-12-27 | Battery diaphragm coiling mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211569758U (en) |
-
2019
- 2019-12-27 CN CN201922402745.1U patent/CN211569758U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106129483B (en) | A kind of takeup type battery core | |
| CN106981625A (en) | A kind of production method of complex lithium band | |
| CN101662011A (en) | Battery pole piece and preparation method thereof and battery containing same | |
| CN103151551B (en) | The method of battery manufacture | |
| CN206022538U (en) | A kind of lithium battery anti-roll-in corrugation device of zebra coating pole piece | |
| CN211569758U (en) | Battery diaphragm coiling mechanism | |
| JP5935670B2 (en) | Electrode manufacturing apparatus and electrode manufacturing method | |
| KR101651516B1 (en) | A Cell Assembly with Improved Jelly-Roll Type Structure and A Secondary Battery Comprising the Same | |
| CN203631690U (en) | Winding core for winding lithium battery diaphragm | |
| CN108899585B (en) | Alternating type battery cell of lithium battery and manufacturing method thereof | |
| CN217507590U (en) | Multi-tab pole piece, secondary battery cell and battery | |
| CN208955105U (en) | A kind of rolling pole piece of lithium ion battery device | |
| CN208655791U (en) | Battery pole piece roll | |
| CN211920472U (en) | Roll core for rolling battery diaphragm | |
| CN209880744U (en) | High-rate discharge polymer lithium ion battery with reverse-winding structure | |
| JP2002184394A (en) | Sheet material rolling method | |
| CN213223755U (en) | Multistage calendering device of ultra-thin lithium area | |
| CN118073668B (en) | Sectional winding method, winding core and winding battery | |
| CN208970632U (en) | Full utmost point ear positive plate, coiling electricity core | |
| CN217035673U (en) | Rolling laser cutting all-in-one machine | |
| CN218925913U (en) | Pole piece rolling structure and pole piece rolling device | |
| CN205341556U (en) | Rolling coiling mechanism of calendering copper foil | |
| CN219534808U (en) | Pole piece structure and lithium ion battery | |
| CN220358119U (en) | Positive plate and winding cell | |
| CN213184015U (en) | Coiling mechanism is used in film capacitor production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |