CN206541895U - A kind of anti-deformation lithium battery coiling core - Google Patents
A kind of anti-deformation lithium battery coiling core Download PDFInfo
- Publication number
- CN206541895U CN206541895U CN201720226850.2U CN201720226850U CN206541895U CN 206541895 U CN206541895 U CN 206541895U CN 201720226850 U CN201720226850 U CN 201720226850U CN 206541895 U CN206541895 U CN 206541895U
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- China
- Prior art keywords
- straight portion
- deformation
- lithium battery
- clear area
- spacer block
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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 is related to coiling type lithium battery technical field, specifically related to a kind of anti-deformation lithium battery coiling core, including core body, the core body is by the positive plate that is laminated, barrier film, negative plate winding is formed, the positive plate includes several straight portions and several bending sections of alternately connection, several described straight portions include a special straight portion, the outer ring in the special straight portion includes the straight portion clear area of uncoated active powder material and is connected to the straight portion coating area for being coated with the activity powder bed of material at straight portion clear area two ends, pad is provided with the spacer block matched with straight portion clear area between the straight portion clear area in the special straight portion and barrier film.Spacer block is set by the special straight portion in battery roll core, makes the outer cycle space increase of the core beyond spacer block, in formation process, the core inner ring within spacer block just has certain expansion space, so as to avoid the generation of deformation phenomenon.
Description
Technical field
The utility model is related to coiling type lithium battery technical field, and in particular to a kind of anti-deformation lithium battery coiling core.
Background technology
Prior art, in recent years, with the increase of the share of mobile phone market, needles of various sizes battery is sharply increased, with setting about
Transition of the machine battery from aluminum hull to Soft Roll, battery energy density, the increase of thickness, for battery flatness requirement also increasingly
Height, therefore, the target that lifting cell thickness uniformity and flatness are studied into us.
Battery out-of-flatness, causes mainly due to deformation, because battery is more and more thicker, and the number of turns of core increases therewith naturally,
Battery is during chemical conversion, partial volume, and the bounce-back of pole piece is also more severe, and the tension force of inside battery does not have Free up Memory, or everywhere
Free up Memory it is uneven, just easily deform.
The content of the invention
The purpose of this utility model be for it is of the prior art it is above-mentioned deficiency there is provided one kind in winding process, pass through
Increase object inside it, cause outer a few cycle space increases, so that inner ring is several layers of in formation process has enough in bounce-back
Spatially extended, expansion anti-deformation lithium battery coiling core.
The purpose of this utility model is achieved through the following technical solutions：
A kind of anti-deformation lithium battery coiling core, including core body, the core body is by the positive plate being laminated, barrier film, negative
Pole piece coiling is formed, and the positive plate includes several straight portions and several bending sections, several described straight portions of alternately connection
Include a special straight portion, the outer ring in the special straight portion includes the straight portion clear area of uncoated active powder material and connected respectively
Be connected to the straight portion coating area for being coated with the activity powder bed of material at straight portion clear area two ends, the straight portion clear area in the special straight portion with every
Pad is provided with the spacer block matched with straight portion clear area between film.
Wherein, the spacer block is semicylinder, and the semicylinder includes rectangular bottom surface and arc top surface, the rectangular base
Face matches and abutted with straight portion clear area, and the arc top surface is abutted with spacer block.
Further, the distance of the peak of the arc top surface and rectangular bottom surface is 0.1-0.3mm.
Further, the thickness of the activity powder bed of material of the straight portion coating area is 10-20 μm.
Wherein, the straight portion clear area and straight portion coating area are the equal rectangle of width, the straight portion clear area and straight
The length ratio of portion coating area is 3-5:1.
Wherein, straight portion's quantity on the outside of the special straight portion and straight portion's quantity ratio on the inside of special straight portion are 1:6-6:1.
Wherein, the inner ring of the bending section is the bending section clear area of uncoated active powder material, and the outer ring of bending section is painting
Cover the bending section coating area of active powder material.
Wherein, the spacer block is PVC spacer blocks.
The beneficial effects of the utility model：Spacer block is set by the special straight portion in battery roll core, makes the volume beyond spacer block
The outer cycle space increase of core, in formation process, the core inner ring within spacer block just has certain expansion space, so as to avoid shape
Become the generation of phenomenon.
Brief description of the drawings
Utility model is described further using accompanying drawing, but the embodiment in accompanying drawing is not constituted to of the present utility model
What is limited, on the premise of not paying creative work, can also be according to the following drawings for one of ordinary skill in the art
Obtain other accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Reference includes：1- positive plates, 2- barrier films, 3- negative plates, the straight portions of 11-, 12- bending sections, the special straight portions of 13-,
The straight portion clear areas of 131-, the straight portion coating areas of 132-, 133- spacer blocks.
Embodiment
The utility model is further described with the following Examples.
See Fig. 1, a kind of anti-deformation lithium battery coiling core, including core body, the core body by be laminated positive plate 1,
Barrier film 2, the winding of negative plate 3 are formed, and the positive plate 1 includes several straight portions 11 and several bending sections 12 of alternately connection,
Several described straight portions 11 include a special straight portion 13, and the outer ring in the special straight portion 13 includes uncoated active powder material
Straight portion clear area 131 and the straight portion coating area for being coated with the activity powder bed of material for being connected to the straight two ends of portion clear area 131
132, pad is provided with the spacer block matched with straight portion clear area 131 between the straight portion clear area 131 in the special straight portion 13 and barrier film 2
131。
Wherein, the spacer block 131 is semicylinder, and the semicylinder includes rectangular bottom surface and arc top surface, the square
Shape bottom surface matches and abutted with straight portion clear area 131, and the arc top surface is abutted with spacer block 131.The setting of semicylinder can
To avoid spacer block 131 to pierce through barrier film 2 well, so that both positive and negative polarity active powder material directly contacts generation short circuit phenomenon.
Further, the distance of the peak of the arc top surface and rectangular bottom surface is 0.1-0.3mm.Arc top surface is most
The distance of high point and rectangular bottom surface is less than 0.1mm, the insufficient space of outer ring, it is impossible to play good anti-deformation effect；It is more than
During 0.3mm, it is blocked up to be easily caused core, is unfavorable for production and sales.
Further, the thickness of the activity powder bed of material of the straight portion coating area 132 is 10-20 μm.Straight portion coating area 132
With the junction of straight portion clear area 131 because the thickness of the activity powder bed of material can make the straight opposing recesses of portion clear area 131, to spacer block
131 play and certain connect and fix effect, it is to avoid spacer block 131 shifts and scrapes active powder material, so as to reduce battery performance.
Wherein, the straight portion clear area 131 and straight portion coating area 132 rectangle that to be width equal, straight portion's blank
The length ratio of area 131 and straight portion coating area 132 is 3-5:1.Straight portion 131 length of clear area are excessive, are easily caused the space of outer ring
It is not enough；Length is too short, is easily caused stress increase of the barrier film 2 on spacer block 131, and easily piercing through barrier film 2 or the contraction of barrier film 2 causes
Part positive/negative plate 3 is not obstructed by barrier film 2, so as to occur short circuit phenomenon.
Wherein, the quantity of straight portion 11 and the quantity ratio of straight portion 11 of the special straight inner side of portion 13 in the special straight outside of portion 13 are 1:
6-6:1.The position in special straight portion 13 can be adjusted according to the demand of actual production.
Wherein, the inner ring of the bending section 12 is outside the clear area of bending section 12 of uncoated active powder material, bending section 12
Enclose to coat the coating area of bending section 12 of active powder material.The inner ring of bending section 12 is not coated by active powder material, bending of being more convenient for, and also drops
The low rebound effect of pole piece.
Wherein, the spacer block 131 is PVC spacer blocks.
Finally it should be noted that above example is only illustrating the technical solution of the utility model, rather than to this reality
With the limitation of novel protected scope, although being explained with reference to preferred embodiment to the utility model, this area it is general
Lead to it will be appreciated by the skilled person that can be modified to the technical solution of the utility model or equivalent substitution, without departing from this
The spirit and scope of utility model technical scheme.
Claims (8)
1. a kind of anti-deformation lithium battery coiling core, it is characterised in that：Including core body, the core body is by the positive pole that is laminated
Piece, barrier film, negative plate winding are formed, and the positive plate includes several straight portions and several bending sections of alternately connection, described
Several straight portions include a special straight portion, and the outer ring in the special straight portion includes the straight portion clear area of uncoated active powder material
And it is connected to the straight portion coating area for being coated with the activity powder bed of material at straight portion clear area two ends, the straight portion in the special straight portion
Pad is provided with the spacer block matched with straight portion clear area between clear area and barrier film.
2. a kind of anti-deformation lithium battery coiling core according to claim 1, it is characterised in that：The spacer block is semicylinder,
The semicylinder includes rectangular bottom surface and arc top surface, and the rectangular bottom surface matches and abutted with straight portion clear area, described
Arc top surface is abutted with spacer block.
3. a kind of anti-deformation lithium battery coiling core according to claim 2, it is characterised in that：The peak of the arc top surface
Distance with rectangular bottom surface is 0.1-0.3mm.
4. a kind of anti-deformation lithium battery coiling core according to claim 3, it is characterised in that：The activity of the straight portion coating area
The thickness of powder layer is 10-20 μm.
5. a kind of anti-deformation lithium battery coiling core according to claim 1, it is characterised in that：The straight portion clear area and straight portion
Coating area is the equal rectangle of width, and the length ratio of the straight portion clear area and straight portion coating area is 3-5:1.
6. a kind of anti-deformation lithium battery coiling core according to claim 1, it is characterised in that：It is straight on the outside of the special straight portion
Portion's quantity is 1 with straight portion's quantity ratio on the inside of special straight portion:6-6:1.
7. a kind of anti-deformation lithium battery coiling core according to claim 1, it is characterised in that：The inner ring of the bending section is not
The bending section clear area of active powder material is coated, the outer ring of bending section is the bending section coating area of coating active powder material.
8. a kind of anti-deformation lithium battery coiling core according to claim 1, it is characterised in that：The spacer block is PVC spacer blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720226850.2U CN206541895U (en) | 2017-03-09 | 2017-03-09 | A kind of anti-deformation lithium battery coiling core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720226850.2U CN206541895U (en) | 2017-03-09 | 2017-03-09 | A kind of anti-deformation lithium battery coiling core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206541895U true CN206541895U (en) | 2017-10-03 |
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ID=59942214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720226850.2U Active CN206541895U (en) | 2017-03-09 | 2017-03-09 | A kind of anti-deformation lithium battery coiling core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206541895U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022170451A1 (en) * | 2021-02-09 | 2022-08-18 | 宁德新能源科技有限公司 | Cell and electronic device using same |
-
2017
- 2017-03-09 CN CN201720226850.2U patent/CN206541895U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022170451A1 (en) * | 2021-02-09 | 2022-08-18 | 宁德新能源科技有限公司 | Cell and electronic device using same |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 523000 Kirin Ridge Road, Shahu, Tangxia Town, Dongguan, Guangdong Province, No. 49 Patentee after: Guangdong Yong Bang new energy Limited by Share Ltd Address before: 523000 Kirin Ridge Road, Shahu, Tangxia Town, Dongguan, Guangdong Province, No. 49 Patentee before: Dongguan Yong Bang Amperex Technology Limited |