CN214797511U - Winding needle for winding lithium battery - Google Patents
Winding needle for winding lithium battery Download PDFInfo
- Publication number
- CN214797511U CN214797511U CN202120891333.3U CN202120891333U CN214797511U CN 214797511 U CN214797511 U CN 214797511U CN 202120891333 U CN202120891333 U CN 202120891333U CN 214797511 U CN214797511 U CN 214797511U
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- Prior art keywords
- needle
- winding
- rolling
- main
- fixing piece
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- 238000004804 winding Methods 0.000 title claims abstract description 105
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 abstract description 13
- 230000008602 contraction Effects 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a lithium cell is convoluteed and is used a book needle, including main needle, vice needle and the mounting of rolling up, the main needle of rolling up is equipped with the concave surface along its length direction, vice needle of rolling up is equipped with along its length direction with the anastomotic convex surface of concave surface, the main needle concave surface of rolling up is laminated mutually with vice needle convex surface and is formed the needle body that the cross-section is circular form, the main needle body one end of rolling up needle and vice needle cooperation back formation is fixed with the mounting. The utility model has the advantages that the needle body with a circular section is formed by the joint of the main winding needle and the auxiliary winding needle, the dislocation degree of the free end of the winding needle can be reduced in the winding process, and the symmetry of the winding center hole is improved, thereby avoiding the deformation of the electrode structure at the center hole position caused by the expansion and contraction of the electrode volume in the process of testing the cycle performance of the battery; and the stress of the winding needle during winding can be reduced, and the service life of the winding needle is prolonged.
Description
Technical Field
The utility model relates to a lithium ion battery technical field specifically is a lithium cell coils needle of usefulness.
Background
In the manufacturing process of the cylindrical lithium ion battery, the winding core pole group is designed and manufactured by adopting a winding structure, and the winding needle is one of main components of a winding equipment tool and determines the structural form of a central hole of the winding core. At present, the needle rolling structure is generally formed by combining two rolling needles with semicircular cross sections, and meanwhile, the needle rolling structure also comprises a fixing piece connected with the rolling needles. In the winding process, the two winding needle planes are mutually attached while the winding needle clamps the diaphragm, so that a cylinder or a shape similar to a cylinder is formed; and then, the fixing piece rotates the winding needle, the negative electrode and the positive electrode plate are sequentially inserted for winding the winding core, and finally, the winding needle is sequentially pulled out to finish the manufacture of the winding core. However, such a needle winding form involves the following risks: the winding needle structure with the semicircular section is used, the free end of the winding needle structure can have dislocation in the winding process, and the dislocation degree is too large, so that the central hole of the wound winding core is in an asymmetric phenomenon and a non-circular state. The risk that the center hole part of the roll core is deformed exists in the process of testing the cycle performance of the battery, and the performance of the battery is reduced. The stress that two other section are the book needle of semicircle receives is great in the coiling in-process, can shorten book needle life.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of how to reduce the dislocation degree of the free end of the winding needle, improve the symmetry of the center hole and prolong the service life of the winding needle.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a lithium cell is convoluteed and is used book needle, includes that the main needle, vice book needle and mounting of rolling up, the main needle of rolling up is equipped with level and smooth concave surface along its length direction, vice book needle is equipped with along its length direction coincide and level and smooth convex surface with the concave surface, the main needle concave surface of rolling up is laminated mutually with vice book needle convex surface and is formed the needle body of cross-section for circular form, the main needle body one end of rolling up needle and vice book needle cooperation back formation is fixed with the mounting.
The main winding needle and the auxiliary winding needle are jointed to form a needle body with a circular section, so that the dislocation degree of the free end of the winding needle can be reduced and the symmetry of a winding center hole can be improved in the winding process, and the deformation of an electrode structure at the position of the center hole caused by the expansion and contraction of the volume of an electrode in the battery cycle performance test process is avoided; and can reduce the stress when rolling up the needle and coiling, improve and roll up needle life to concave surface and concave surface are established to level and smooth form, make things convenient for later stage owner to roll up needle and vice book needle and take out from rolling up the core.
Preferably, the section of the main winding needle is crescent, and the section of the auxiliary winding needle is elliptical.
Preferably, the end of the main winding needle far away from the first fixing piece is arc-shaped.
Preferably, the end part of the secondary winding needle far away from the second fixing piece is arc-shaped; the main winding needle and the secondary winding needle are prevented from puncturing the septum when the septum is wound in a crossed manner between the main winding needle and the secondary winding needle.
Preferably, the fixing part comprises a first fixing part and a second fixing part, one end of the main winding needle is connected with the first fixing part, and one end of the auxiliary winding needle is connected with the second fixing part.
Preferably, the first fixing piece and the second fixing piece are attached to each other to form a structure with a cylindrical or polygonal cross section.
Preferably, the cross section of the first fixing piece is crescent, and the cross section of the second fixing piece is elliptical.
Preferably, the first fixing piece and the second fixing piece are semicircular in cross section and equal in circular diameter.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the main winding needle and the auxiliary winding needle are jointed to form a needle body with a circular section, so that the dislocation degree of the free end of the winding needle can be reduced and the symmetry of a winding center hole can be improved in the winding process, and the deformation of an electrode structure at the position of the center hole caused by the expansion and contraction of the volume of an electrode in the battery cycle performance test process is avoided; and can reduce the stress when rolling up the needle and coiling, improve and roll up needle life to concave surface and concave surface are established to level and smooth form, make things convenient for later stage owner to roll up needle and vice book needle and take out from rolling up the core.
2. The ends, far away from the fixing piece, of the main winding needle and the auxiliary winding needle are made to be arc-shaped, so that the main winding needle and the auxiliary winding needle are prevented from penetrating through the diaphragm when the diaphragm is wound in a crossed mode between the main winding needle and the auxiliary winding needle.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention;
fig. 2 is a cross-sectional view of the main winding needle and the auxiliary winding needle of the embodiment of the utility model after being matched.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention by those skilled in the art, the technical solutions of the present invention will now be further described with reference to the drawings attached to the specification.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless explicitly stated or limited otherwise, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 and 2, this embodiment discloses a lithium battery rolls up needle of rolling up of usefulness, including main needle 1, the vice needle 2 of rolling up and mounting 3 of rolling up, main needle 1 of rolling up is equipped with smooth concave surface along its length direction, vice needle 2 of rolling up is equipped with along its length direction and coincide and smooth convex surface with the concave surface, the main needle 1 concave surface of rolling up is laminated mutually with vice needle 2 convex surface of rolling up and is formed the needle body that the cross-section is circular form, main needle 1 of rolling up and vice needle 2 cooperation back needle body one end that forms is fixed with mounting 3.
The main winding needle 1 and the auxiliary winding needle 2 are jointed to form a needle body with a circular section, so that the dislocation degree of the free end of the winding needle can be reduced and the symmetry of a winding center hole can be improved in the winding process, and the deformation of an electrode structure at the position of the center hole caused by the expansion and contraction of the volume of an electrode in the battery cycle performance test process can be avoided; the stress of the winding needle during winding can be reduced, and the service life of the winding needle is prolonged; and the concave surface are smooth, so that the main winding needle 1 and the auxiliary winding needle 2 can be conveniently pulled out from the winding core in the later period.
Furthermore, the section of the main winding needle 1 is crescent, and the section of the auxiliary winding needle 2 is elliptic.
The tip that fixing piece 3 was kept away from to main book needle 1 is the arc form, the tip that fixing piece 3 was kept away from to vice book needle 2 also is the arc form, has avoided the diaphragm to roll up main book needle 1 and vice book needle 2 and impale the diaphragm when encircleing in the intersection between main book needle 1 and vice book needle 2.
The fixing part 3 comprises a first fixing part 31 and a second fixing part 32, one end of the main winding needle 1 is connected with the first fixing part 31, one end of the auxiliary winding needle 2 is connected with the second fixing part 32, the first fixing part 311 and the second fixing part 32 are attached to form a structure with a cylindrical cross section, and specifically, the cross section of the first fixing part 31 can be crescent and the cross section of the second fixing part 32 can be oval matched with the crescent first fixing part 31; similarly, the cross sections of the first fixing member 31 and the second fixing member 32 may be semicircular and have the same circular diameter, so that the first fixing member 31 and the second fixing member 32 are attached to each other to form a cylindrical or polygonal structure, which facilitates the insertion of the needle coil into the driving device.
The working process of the utility model is as follows: the second fixing piece 32 at the end part of the auxiliary winding needle 2 is inserted into the driving device, the first fixing piece 31 at the end part of the main winding needle 1 is inserted into the driving device, meanwhile, the main winding needle 1 is attached to the auxiliary winding needle 2, and the first fixing piece 31 is attached to the second fixing piece 32. Then inserting the free ends of the auxiliary winding needle 2 and the main winding needle 1 into the diaphragm to be wound to clamp the diaphragm to be wound; then, the driving device is opened, the main winding needle 1 and the auxiliary winding needle 2 are driven to synchronously rotate towards a certain direction through the first fixing piece 31 and the second fixing piece 32, then the negative pole and the positive pole piece are sequentially inserted until the required winding core size is wound, winding of the winding core is completed, finally the auxiliary winding needle 2 is drawn out, then the main winding needle 1 is drawn out, and manufacturing of the winding core is completed.
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, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The above embodiments only show the embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and for those skilled in the art, a plurality of modifications and improvements can be made without departing from the concept of the present invention, and these modifications and improvements all belong to the protection scope of the present invention.
Claims (8)
1. A lithium cell coils needle of usefulness which characterized in that: including main needle, vice needle and the mounting of rolling up, main needle of rolling up is equipped with level and smooth concave surface along its length direction, vice needle of rolling up is equipped with along its length direction and coincide and the level and smooth convex surface with the concave surface, main needle concave surface and vice needle convex surface of rolling up are laminated mutually and are formed the needle body of cross-section for circular form, main needle and vice needle one end of rolling up that forms after the cooperation of needle are fixed with the mounting.
2. The winding pin for winding a lithium battery as claimed in claim 1, wherein: the section of the main winding needle is crescent, and the section of the auxiliary winding needle is elliptic.
3. The winding pin for winding a lithium battery as claimed in claim 1, wherein: the end part of the main winding needle far away from the first fixing part is arc-shaped.
4. The winding pin for winding a lithium battery as claimed in claim 1, wherein: the end part of the auxiliary winding needle far away from the second fixing piece is arc-shaped.
5. The winding pin for winding a lithium battery as claimed in claim 1, wherein: the fixing piece comprises a first fixing piece and a second fixing piece, one end of the main winding needle is connected with the first fixing piece, and one end of the auxiliary winding needle is connected with the second fixing piece.
6. The winding pin for winding a lithium battery as claimed in claim 5, wherein: the first fixing piece and the second fixing piece are attached to form a structure with a cylindrical or polygonal cross section.
7. The winding pin for winding a lithium battery as claimed in claim 5 or 6, wherein: the cross-section of first mounting is crescent, the cross-section of second mounting is oval.
8. The winding pin for winding a lithium battery as claimed in claim 5 or 6, wherein: the cross sections of the first fixing piece and the second fixing piece are semicircular and the circular diameters of the first fixing piece and the second fixing piece are equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120891333.3U CN214797511U (en) | 2021-04-27 | 2021-04-27 | Winding needle for winding lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120891333.3U CN214797511U (en) | 2021-04-27 | 2021-04-27 | Winding needle for winding lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214797511U true CN214797511U (en) | 2021-11-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120891333.3U Active CN214797511U (en) | 2021-04-27 | 2021-04-27 | Winding needle for winding lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214797511U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115084628A (en) * | 2022-08-19 | 2022-09-20 | 江苏时代新能源科技有限公司 | Winding needle and winding device |
-
2021
- 2021-04-27 CN CN202120891333.3U patent/CN214797511U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115084628A (en) * | 2022-08-19 | 2022-09-20 | 江苏时代新能源科技有限公司 | Winding needle and winding device |
| CN115084628B (en) * | 2022-08-19 | 2022-11-22 | 江苏时代新能源科技有限公司 | Winding needle and winding device |
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| GR01 | Patent grant | ||
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