CN206541896U - A kind of anti-short-circuit lithium battery coiling core - Google Patents
A kind of anti-short-circuit lithium battery coiling core Download PDFInfo
- Publication number
- CN206541896U CN206541896U CN201720225996.5U CN201720225996U CN206541896U CN 206541896 U CN206541896 U CN 206541896U CN 201720225996 U CN201720225996 U CN 201720225996U CN 206541896 U CN206541896 U CN 206541896U
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- Prior art keywords
- straight portion
- core
- lithium battery
- clear area
- short
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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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- Connection Of Batteries Or Terminals (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model is related to coiling type lithium battery technical field, specifically related to a kind of anti-short-circuit 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 straight portion clear area and is connected to the straight portion coating area 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.The utility model sets spacer block by the special straight portion in battery roll core, make the outer cycle space increase of the core beyond spacer block, in formation process, core inner ring within spacer block just has certain expansion space, so as to avoid the generation of deformation phenomenon, also reducing diaphragm retracts causes the probability of happening of short circuit phenomenon, even if occurring short circuit, lug can also occur to fuse and cut off circuit.
Description
Technical field
The utility model is related to coiling type lithium battery technical field, and in particular to a kind of anti-short-circuit 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, the number of turns of core increases therewith naturally, battery
During chemical conversion, partial volume, the bounce-back of pole piece is also more severe, and the tension force of inside battery does not have a Free up Memory, or releasing everywhere
It is uneven between emptying, just easily deform.
Due to the contraction of barrier film after deforming, easily cause barrier film can not be completely covered positive/negative plate it
Between, so as to occur short circuit.
The content of the invention
The purpose of this utility model is can to provide tension force there is provided one kind for above-mentioned deficiency of the prior art to discharge empty
Between suppress deformation and short circuit occur after have stress mechanism anti-short-circuit lithium battery coiling core.
The purpose of this utility model is achieved through the following technical solutions：
A kind of anti-short-circuit 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；The positive plate and negative plate are equipped with lug, the lug bag
The weld part being connected with core body and the lead division beyond core body are included, the lead division is recessed including what is be connected with weld part
The portion of falling into and the outer lead division being connected with depressed part, the depressed part are the narrow concave surface in the wide centre in two ends, and the minimum of the concave surface is wide
Spend for the 1/10-1/8 of weld part width.
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：1., cross spacer block be set in the special straight portion of battery roll core, make 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
The generation of deformation phenomenon, also reducing diaphragm retracts causes the probability of happening of short circuit phenomenon；2nd, depressed part can play similar guarantor
The effect of dangerous silk, fuses when lug is overheated because short circuit etc. is unexpected, so that cell circuit is cut off, the safety of lithium battery
Performance is improved.
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；
Fig. 2 is the structural representation of lug described in the utility model.
Reference includes：The straight portion of 1- positive plates, 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, 2- barrier films, 3- negative plates, 4- lugs, 41- weld parts, 42- lead divisions, 421- depressions
Portion, the outer lead divisions of 422-.
Embodiment
The utility model is further described with the following Examples.
See Fig. 1-2, a kind of anti-deformation lithium battery coiling core, including core body, the core body is by the positive plate that is laminated
1st, 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 of alternately connection
12, several described straight portions 11 include a special straight portion 13, and the outer ring in the special straight portion 13 includes uncoated activity powder
The straight portion clear area 13 of material 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；The positive plate 1 and negative plate 3 are equipped with lug 4, and the lug 4 includes the weld part 41 being connected with core body and super
Go out the lead division 42 of core body, the lead division 42 includes the depressed part 421 being connected with weld part 41 and connected with depressed part 421
The outer lead division 422 connect, the depressed part 421 is the narrow concave surface in the wide centre in two ends, and the minimum widith of the concave surface is weld part
The 1/10-1/8 of 41 width.
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 to illustrate this practicality
New technical scheme, rather than the limitation to the utility model protection domain, although with reference to preferred embodiment to the utility model
Explain, it will be understood by those within the art that, the technical solution of the utility model can be repaiied
Change or equivalent substitution, without departing from the spirit and scope of technical solutions of the utility model.
Claims (8)
1. a kind of anti-short-circuit 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；
The positive plate and negative plate are equipped with lug, and the lug includes the weld part being connected with core body and beyond core
The lead division of body, the lead division includes the depressed part being connected with weld part and the outer lead division being connected with depressed part, described
Depressed part is the narrow concave surface in the wide centre in two ends, and the minimum widith of the concave surface is the 1/10-1/8 of weld part width.
2. the anti-short-circuit lithium battery coiling core of one kind 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. the anti-short-circuit lithium battery coiling core of one kind 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. the anti-short-circuit lithium battery coiling core of one kind 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. the anti-short-circuit lithium battery coiling core of one kind 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. the anti-short-circuit lithium battery coiling core of one kind 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. the anti-short-circuit lithium battery coiling core of one kind 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. the anti-short-circuit lithium battery coiling core of one kind 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 |
|---|---|---|---|
| CN201720225996.5U CN206541896U (en) | 2017-03-09 | 2017-03-09 | A kind of anti-short-circuit lithium battery coiling core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720225996.5U CN206541896U (en) | 2017-03-09 | 2017-03-09 | A kind of anti-short-circuit lithium battery coiling core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206541896U true CN206541896U (en) | 2017-10-03 |
Family
ID=59942202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720225996.5U Active CN206541896U (en) | 2017-03-09 | 2017-03-09 | A kind of anti-short-circuit lithium battery coiling core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206541896U (en) |
-
2017
- 2017-03-09 CN CN201720225996.5U patent/CN206541896U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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 |
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| CP01 | Change in the name or title of a patent holder |