CN102347515A - Battery core of spiral lithium ion battery, and spiral lithium ion battery - Google Patents
Battery core of spiral lithium ion battery, and spiral lithium ion battery Download PDFInfo
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- CN102347515A CN102347515A CN2010102431009A CN201010243100A CN102347515A CN 102347515 A CN102347515 A CN 102347515A CN 2010102431009 A CN2010102431009 A CN 2010102431009A CN 201010243100 A CN201010243100 A CN 201010243100A CN 102347515 A CN102347515 A CN 102347515A
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- plate
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- lithium battery
- type lithium
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title abstract 5
- 229910001416 lithium ion Inorganic materials 0.000 title abstract 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 31
- 229910052744 lithium Inorganic materials 0.000 claims description 31
- 230000004888 barrier function Effects 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 238000005868 electrolysis reaction Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 description 6
- 229910018095 Ni-MH Inorganic materials 0.000 description 4
- 229910018477 Ni—MH Inorganic materials 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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 invention discloses a battery core of a spiral lithium ion battery, and a spiral lithium ion battery containing the battery core. The spiral lithium ion battery comprises a battery housing, and a spiral battery core and a battery upper cap positioned in the battery housing. The battery core comprises an anode sheet, a cathode sheet, a separating film, an anode flow concentrating plate, and a cathode flow concentrating plate. The upper end of the anode sheet and the lower end of the cathode sheet are provided with uncoated blank bands. After the anode sheet and the cathode sheet are separated by using the separating film and are rolled, the lower surface of the anode flow concentrating plate firmly contacts the circular blank band formed on the anode sheet, and the upper surface of the cathode flow concentrating plate firmly contacts the circular blank band formed on the cathode sheet. The anode flow concentrating plate is electrically connected to the upper cap of the battery. The cathode flow concentrating plate is electrically connected to the housing. The battery provided by the invention is advantaged in small internal resistance, uniformly distributed current, and long service life. The battery is especially suitable for power batteries of electric cars and the like.
Description
Technical field
The present invention relates to field of batteries, especially relate to a kind of electric core and coiling type lithium battery of coiling type lithium battery.
Background technology
Storage battery kind as energy storage unit has lead-acid battery, Ni-MH battery, lithium battery etc., and the price of lead acid accumulator is minimum, and its shortcoming is that specific volume is little, that is to say, under same capacity, battery weight and volume are all big, and efficiency for charge-discharge is low, and the life-span is short; The specific volume of Ni-MH battery is well more a lot of than lead acid accumulator, and the life-span of cell is also relatively good, and its large current density electrical characteristics are also good than lead acid accumulator, but compare with lithium battery, and its raw-material cost is in rising trend; The specific volume of lithium battery is better than Ni-MH battery, and the parameter of its weight, charge efficiency and life-span aspect is also all good than Ni-MH battery.Therefore, lithium battery is able to use widely at present, and more high-energy, the development of bigger sense of current of lithium battery forward.
Making the comparatively general method of lithium battery electric core now is to adopt stacked and takeup type dual mode.
Stacked is earlier positive plate and negative plate all to be die-cut into small pieces one small pieces, has lug on the every pole piece, the positive plate of small pieces and negative plate is separated with lamination machine slices with barrier film to gather into folds again; Draw positive pole and negative pole after more all anode ears and negative electrode lug being welded together respectively, the internal resistance of cell of this structure is less, and specific power is big; But in order to guarantee to cut precision, high to cutting the mould and die accuracy requirement, equipment drops into high; And technology is comparatively complicated, and production efficiency is low.
Coiled lithium battery cell is strip positive plate and negative plate to be separated being stacked together back with barrier film form with special-purpose core winding machine coiling; Conventional mode is to reserve a part of non-coating at an end of pole piece; Lug is welded in this non-coating draws anodal and negative pole (as shown in Figure 1); The defective that the electric core of this structure exists is: derive or import because battery electric current when charge and discharge all will be concentrated from an end of lug, cause on CURRENT DISTRIBUTION highly inhomogeneously, electrochemical polarization is very serious; The internal resistance of battery is big, and rapid heating phenomenon takes place under the situation of power charge and discharge.
China's CN101106203A patent " lithium battery and manufacturing approach thereof with new electrode structure " discloses a kind of core strueture of lithium battery; This structure is on pole piece, to be provided with a plurality of lug sheets with preset distance, so that a plurality of lug sheet overlaids form lug after reeling.The mode that this kind is provided with a plurality of lug sheets has reduced the internal resistance of battery to a certain extent, has solved the uneven problem of CURRENT DISTRIBUTION.But its lug sheet is to be provided with at interval, because of certain distance (as for 100 meters long pole pieces, therebetween at a distance from about 10 meters) is still arranged at interval, still exists the internal resistance of cell big to a certain extent, the uneven problem of CURRENT DISTRIBUTION.
Summary of the invention
Problem to be solved by this invention is the defective that overcomes above-mentioned prior art, effectively solves the uneven problem of coiled lithium battery cell CURRENT DISTRIBUTION, and the electric core and the coiling type lithium battery of the little coiling type lithium battery of a kind of internal resistance of cell is provided.
Technical scheme of the present invention is: the electric core of coiling type lithium battery of the present invention comprises positive plate, negative plate, barrier film, anode collection plate and negative pole currect collecting plate; The upper end of said positive plate and the lower end of said negative plate are provided with uncoated blank tape; After said positive plate and said negative plate separate coiling with barrier film; The blank tape of the formation circle on said anode collection plate lower surface and the said positive plate is closely contact mutually, and the blank tape of the formation circle on said negative pole currect collecting plate upper surface and the said negative plate closely contacts mutually.
The inside bending of blank tape of the formation circle of said positive plate and said negative plate all overlaps the every circle of blank tape mutually with the inner ring that is adjacent.
The upper surface of said anode collection plate is provided with some radial slots that are uniformly distributed with and reaches roughly the connector of shape axisymmetricly; Said anode collection plate is provided with the hole that at least one electrolysis liquid injects.
The lower surface of said negative pole currect collecting plate is provided with some radial slots that are uniformly distributed with; Said negative pole currect collecting plate is provided with the logical hole of at least one electrolysis flow.
Coiling type lithium battery of the present invention comprises battery container, is positioned over coiling electricity core and cell cover in the battery container; Said electric core comprises positive plate, negative plate, barrier film, anode collection plate and negative pole currect collecting plate; The upper end of said positive plate and the lower end of said negative plate are provided with uncoated blank tape; After said positive plate and said negative plate separate coiling with barrier film; The blank tape of the formation circle on said anode collection plate lower surface and the said positive plate is closely contact mutually, and the blank tape of the formation circle on said negative pole currect collecting plate upper surface and the said negative plate closely contacts mutually; Said anode collection plate is electrically connected with said cell cover, and said negative pole currect collecting plate is electrically connected with said housing.
Between said anode collection plate and the said battery container, between said cell cover and the said battery container insulated enclosure circle is housed all.
Said cell cover is provided with liquid injection port.
The invention has the beneficial effects as follows: the present invention is provided with uncoated blank tape in the upper end and the negative plate lower end of positive plate respectively; After positive plate and negative plate separated coiling with barrier film; The blank tape that forms circle on anode collection plate lower surface and the positive plate closely contacts; The blank tape that forms circle on negative pole currect collecting plate upper surface and the negative plate closely contacts; Draw positive pole and negative pole by anode collection plate and negative pole currect collecting plate respectively, solved the uneven problem of CURRENT DISTRIBUTION dramatically, reduced the internal resistance of battery; The inside bending of blank tape of the formation circle of positive plate and negative plate all overlaps the every circle of blank tape mutually with the inner ring that is adjacent; Can guarantee that each point on the blank tape all links to each other with collector plate, thus the heat that can effectively derive or import electric current and effectively derive electric in-core portion; Anode collection plate upper surface and negative pole currect collecting plate lower surface are equipped with some radial slots that are uniformly distributed with, and reduce the collector plate thickness of trench bottom, can make the laser penetration collector plate realize effectively welding between collector plate and the pole piece.
Description of drawings
Fig. 1 is the structural representation of a kind of pole piece of prior art;
Fig. 2 is the structural representation of the another kind of pole piece of prior art;
Fig. 3 is the structural representation of positive plate of the present invention;
Fig. 4 is the structural representation of negative plate of the present invention;
Fig. 5 is the structural representation of the present invention's electricity core;
Fig. 6 is the I portion enlarged diagram among Fig. 5;
Fig. 7 is the II portion enlarged diagram among Fig. 5;
Fig. 8 is the plan structure sketch map of anode collection plate of the present invention;
Fig. 9 is the A-A cutaway view among Fig. 8;
Figure 10 is the B-B cutaway view among Fig. 8;
Figure 11 is the structural representation of looking up of negative pole currect collecting plate of the present invention;
Figure 12 is the C-C cutaway view among Figure 11;
Figure 13 is the D-D cutaway view among Figure 11;
Figure 14 is the structural representation of battery of the present invention;
Figure 15 is the sectional structure sketch map of cell cover of the present invention;
Figure 16 is the structural representation of looking up of cell cover of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are done concrete the detailed description.
Like Fig. 5, Fig. 6, shown in Figure 7, the electric core of coiling type lithium battery of the present invention is column type, comprises positive plate 4, negative plate 5, barrier film 6, anode collection plate 7 and negative pole currect collecting plate 8.As shown in Figure 3, positive plate 4 upper ends are provided with uncoated blank tape 41; As shown in Figure 4, negative plate 5 lower ends are provided with uncoated blank tape 51; After positive plate 4 separates coiling with negative plate 5 usefulness barrier films 6; The blank tape 41 of the formation circle on anode collection plate 7 lower surfaces and the positive plate 4 is closely contact mutually; The blank tape 51 of the formation circle on negative pole currect collecting plate 8 upper surfaces and the negative plate 5 is closely contact mutually, and wherein all inside bending of the blank tape of the formation circle of positive plate 4 and negative plate 5 all overlaps the every circle of blank tape mutually with the inner ring that is adjacent.
Like Fig. 8, Fig. 9, shown in Figure 10; Anode collection plate 7 is a disc-shaped plate; Evenly be provided with a plurality of radial slots 71 at anode collection plate 7 upper surfaces, groove 71 radially along elongation the blank tape 41 on positive plate 4 tops is all contacted with the opposite face of bottom land to inner ring from outmost turns.Anode collection plate 4 middle parts are provided with through hole, separate near outer cause radial slot 71 evenly to be provided with a plurality of holes 72, for the injection of electrolyte.Anode collection plate 7 upper surface middle part also are provided with connector 73, and this connector 73 is to be separated a plurality of column-like heads that are centrosymmetric by an annulus column by radial slot 71, and the upper surface of these a plurality of column-like heads is in same plane.
Like Figure 11, Figure 12, shown in Figure 13; Negative pole currect collecting plate 8 also is a circular slab; Lower surface at negative pole currect collecting plate 7 is provided with the radial slot 81 that is uniformly distributed with, groove 81 radially along elongation the blank tape 51 of negative plate 5 bottoms is all contacted with the opposite face of bottom land to inner ring from outmost turns.Negative pole currect collecting plate 8 middle parts are provided with through hole, are separated by radial slot 81 also evenly to be provided with a plurality of holes 82, for the circulation of electrolyte.
On anode collection plate 7 and the negative pole currect collecting plate 8 radial slot is set,, can makes the laser penetration collector plate realize the effective welding between collector plate and the pole piece in order to reduce the collector plate thickness of trench bottom.
Shown in figure 14, coiling type lithium battery of the present invention comprises battery container 9, is positioned over takeup type electricity core and cell cover 10 in the battery container, and electric core comprises positive plate 4, negative plate 5, barrier film 6, anode collection plate 7 and negative pole currect collecting plate 8.
Claims (10)
1. the electric core of a coiling type lithium battery; Comprise positive plate, negative plate and barrier film; It is characterized in that: it also comprises anode collection plate and negative pole currect collecting plate; The upper end of said positive plate and the lower end of said negative plate are provided with uncoated blank tape; After said positive plate and said negative plate separated coiling with barrier film, the blank tape of the formation circle on said anode collection plate lower surface and the said positive plate is closely contact mutually, and the blank tape of the formation circle on said negative pole currect collecting plate upper surface and the said negative plate closely contacts mutually.
2. the electric core of coiling type lithium battery according to claim 1, it is characterized in that: the inside bending of blank tape of the formation circle of said positive plate and said negative plate all overlaps the every circle of blank tape mutually with the inner ring that is adjacent.
3. the electric core of coiling type lithium battery according to claim 1 and 2, it is characterized in that: the upper surface of said anode collection plate is provided with some radial slots that are uniformly distributed with.
4. the electric core of coiling type lithium battery according to claim 3 is characterized in that: said anode collection plate is provided with the hole that at least one electrolysis liquid injects.
5. the electric core of coiling type lithium battery according to claim 3, it is characterized in that: said anode collection plate upper surface is provided with roughly the connector of shape axisymmetricly.
6. the electric core of coiling type lithium battery according to claim 1 and 2, it is characterized in that: the lower surface of said negative pole currect collecting plate is provided with some radial slots that are uniformly distributed with.
7. the electric core of coiling type lithium battery according to claim 6 is characterized in that: said negative pole currect collecting plate is provided with the logical hole of at least one electrolysis flow.
8. coiling type lithium battery; Comprise battery container, be positioned over coiling electricity core and cell cover in the battery container; It is characterized in that: said electric core comprises positive plate, negative plate, barrier film, anode collection plate and negative pole currect collecting plate; The upper end of said positive plate and the lower end of said negative plate are provided with uncoated blank tape; After said positive plate and said negative plate separated coiling with barrier film, the blank tape of the formation circle on said anode collection plate lower surface and the said positive plate is closely contact mutually, and the blank tape of the formation circle on said negative pole currect collecting plate upper surface and the said negative plate closely contacts mutually; Said anode collection plate is electrically connected with said cell cover, and said negative pole currect collecting plate is electrically connected with said housing.
9. coiling type lithium battery according to claim 8 is characterized in that: between said anode collection plate and the said battery container, between said cell cover and the said battery container insulated enclosure circle is housed all.
10. coiling type lithium battery according to claim 8 is characterized in that: said cell cover is provided with liquid injection port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102431009A CN102347515A (en) | 2010-08-03 | 2010-08-03 | Battery core of spiral lithium ion battery, and spiral lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102431009A CN102347515A (en) | 2010-08-03 | 2010-08-03 | Battery core of spiral lithium ion battery, and spiral lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN102347515A true CN102347515A (en) | 2012-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102431009A Pending CN102347515A (en) | 2010-08-03 | 2010-08-03 | Battery core of spiral lithium ion battery, and spiral lithium ion battery |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107331809A (en) * | 2017-06-30 | 2017-11-07 | 马鞍山首拓新能源科技有限公司 | Battery energy storage device and preparation method thereof |
| CN109273658A (en) * | 2018-09-21 | 2019-01-25 | 珠海格力电器股份有限公司 | Battery and power battery |
| CN109411803A (en) * | 2018-12-05 | 2019-03-01 | 江苏塔菲尔新能源科技股份有限公司 | Battery cell and battery |
| CN110277582A (en) * | 2019-06-24 | 2019-09-24 | 福建卫东新能源股份有限公司 | A kind of rectangular cell and manufacturing method |
| CN115051043A (en) * | 2022-05-28 | 2022-09-13 | 楚能新能源股份有限公司 | Method for manufacturing lithium ion battery |
| WO2023050254A1 (en) * | 2021-09-30 | 2023-04-06 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electrical device, and method and apparatus for manufacturing battery cell |
| EP4261989A4 (en) * | 2021-10-20 | 2024-07-17 | Contemporary Amperex Technology Co Ltd | Battery cell, fabrication method therefor and fabrication device thereof, battery, and electrical apparatus |
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| CN201725845U (en) * | 2010-08-03 | 2011-01-26 | 唐菊香 | Cell of coiled lithium ion battery and coiled lithium ion battery |
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2010
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107331809A (en) * | 2017-06-30 | 2017-11-07 | 马鞍山首拓新能源科技有限公司 | Battery energy storage device and preparation method thereof |
| CN107331809B (en) * | 2017-06-30 | 2020-05-26 | 张红梅 | Battery energy storage device and preparation method thereof |
| CN109273658A (en) * | 2018-09-21 | 2019-01-25 | 珠海格力电器股份有限公司 | Battery and power battery |
| CN109411803A (en) * | 2018-12-05 | 2019-03-01 | 江苏塔菲尔新能源科技股份有限公司 | Battery cell and battery |
| CN110277582A (en) * | 2019-06-24 | 2019-09-24 | 福建卫东新能源股份有限公司 | A kind of rectangular cell and manufacturing method |
| WO2023050254A1 (en) * | 2021-09-30 | 2023-04-06 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electrical device, and method and apparatus for manufacturing battery cell |
| EP4261989A4 (en) * | 2021-10-20 | 2024-07-17 | Contemporary Amperex Technology Co Ltd | Battery cell, fabrication method therefor and fabrication device thereof, battery, and electrical apparatus |
| CN115051043A (en) * | 2022-05-28 | 2022-09-13 | 楚能新能源股份有限公司 | Method for manufacturing lithium ion battery |
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Owner name: XIANGTAN YINHE ENERGY CO., LTD. Free format text: FORMER OWNER: TANG JUXIANG Effective date: 20120326 |
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Application publication date: 20120208 |