CN104167553B - A kind of square coiled battery pole piece and processing technology thereof - Google Patents
A kind of square coiled battery pole piece and processing technology thereof Download PDFInfo
- Publication number
- CN104167553B CN104167553B CN201410276451.8A CN201410276451A CN104167553B CN 104167553 B CN104167553 B CN 104167553B CN 201410276451 A CN201410276451 A CN 201410276451A CN 104167553 B CN104167553 B CN 104167553B
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- left white
- lug
- negative
- edge
- pole
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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
Abstract
The invention belongs to battery structure technical field, disclose a kind of square coiled battery pole piece, positive and negative collector one edge is provided with evagination lug, the root of described evagination lug is provided with insulation compound coating, described positive collector both sides of the edge are provided with the most minimum being left white, negative collector both sides of the edge are provided with that negative pole is little to be left white, and described the most minimum are left white to posting insulating tape on be left white little with negative pole, and described positive pole applies to be provided with between district and a lateral edges the most minimum is left white and is left white greatly.It is left white greatly the dressing amount providing bigger positive active material, improves the capacity of battery, reduce the cost of battery；In insulation compound coating and evagination lug, dressing is combined closely, and improves the intensity of lug, and plays, during folding lug, the effect that insulation prevents short-circuit state from occurring；To patch insulating tape, cut in this position during winding and can be prevented effectively from dry linting and the burr short-circuit state that causes of cutting knife being cut to material.
Description
Technical field
The invention belongs to battery structure technical field, relate to a kind of square coiled battery pole piece and make work
Skill.
Background technology
Fossil energy shortage, environmental pollution, climate warming have become the problem of whole mankind's facing.China
The oil of 70% is used for automobile, and urban air pollution thing 50% is from automobile, and crude oil external dependence degree is more than 50%.
And develop new-energy automobile, it is to break away from the dependence to fossil energies such as oil, preserve the ecological environment and ensure state
The strategic demand of family's energy security.
Electric automobile is the emphasis of new-energy automobile development, and electrokinetic cell is again the core component of electric automobile.
China's electrokinetic cell industry development that develops into of new-energy automobile opens more wide space, lithium-ion electric
Pond is again the vehicle-mounted power supply of the most potential electric automobile.And as clean traffic instruments such as electric automobiles
Power source, lithium ion battery is faced with high energy density per unit volume, high-quality specific energy, high rate capability and height and makes
Challenge by aspects such as life-spans.For tackling these demands, lithium-ion-power cell industry is entered around battery performance
A series of development and improvement are gone, including aspects such as material, technique, structures.
Around configuration aspects, square lithium ion battery has a variety of structure to design, and mainly includes stacked
And takeup type.Laminated battery plate, because of the design of its lug, has lug to draw and have height on each lamination
The performance of multiplying power, but the quality sides such as laminated battery plate processing technique is complicated, operation is the most loaded down with trivial details, process burr
Face controls the imperfect manufacture such as the strictest and is limited.Coiled battery preparation technology is simple by contrast,
Full-automatic large-scale production can be carried out, therefore develop more rapid, around the shortcoming of its high rate performance difference,
Battery structure aspect also occurs in that the structure design of the most emerging design, such as monopole ear multi-winding-core can improve
The high rate performance of battery, but this structure rolls up, because being required to be lug and head, blank afflux structure headspaces such as being left white
And reduce the volumetric properties of battery.Also have the form using positive/negative plate multi pole ears structure barrier film outsourcing, this
The battery planting structure has higher multiplying power and volumetric properties, but battery core typically cuts dressing in winding process
Position causes substantial amounts of dust and the unshielded folding process of anode ear to be all easier to cause battery core short circuit and pole
Ear manufacturing process is easier the shortcoming lost, needs to carry out certain safeguard procedures, derivative on this
Negative pole laser cuts lug positive pole spot welding the form of rubberizing, largely solves the short circuit problem of battery core,
But the lug position of spot welding occupies certain dressing position and reduces the capacity of battery to a certain extent.
Summary of the invention
Present invention is generally directed to multi pole ears battery core defect in winding process in prior art, it is provided that Yi Zhonggeng
Add rationally and can improve square coiled battery pole piece and the processing technology thereof of multi pole ears battery capacity.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of square coiled battery pole piece, by positive and negative collector and be coated on positive and negative collector just,
Negative pole applies district and constitutes, and described positive and negative collector one edge is provided with evagination lug, the root of described evagination lug
Portion is provided with insulation compound coating, and described positive collector both sides of the edge are provided with the most minimum being left white, negative collector both sides
Edge is provided with that negative pole is little to be left white, and described the most minimum is left white on be left white little with negative pole posting insulating tape, described
Positive pole applies to be provided with between district and a lateral edges the most minimum is left white and is left white greatly.
The most minimum described width that is left white is left white width more than negative pole is little.
The described length that is left white greatly is equal to the length of core outermost one circle after winding.
Described positive and negative electrode realizes negative pole dressing district Fu Bao anode dressing district when applying district's winding.
The processing technology of a kind of square coiled battery pole piece, including closing slurry, coating, roll-in, trimming, volume
Around operation, in coating process, positive pole edge is left white both sides and little is left white, is left white greatly gap and is left white formula coating,
Being left white while alignment of having an acupuncture treatment, negative pole uses edge to be left white, and equity is little is left white gap coating；After coating completes
The coating of area edge closely sealed spot printing insulation compound is applied at positive and negative electrode；During trimming, after laser instrument uses sensing to be left white
Cycle cuts the mode of lug, cuts lug winding the dimensional directions into sheet, by the long error of painting during coating at volume
Around time characterize the afterbody of pole piece, the location bias of lug when can effectively prevent lug from winding.
Beneficial effects of the present invention: in the present invention, positive plate is left white greatly design and provides bigger positive electrode active material
The dressing amount of matter, improves the capacity of battery, is increasing while capacity, does not has barrier film and negative material
Increase, reduce the cost of battery to a certain extent；In insulation compound coating and evagination lug, dressing is tight
In conjunction with, improve the intensity of lug, and during folding lug, play insulation prevent short-circuit state from occurring
Effect；To patch insulating tape, cut in this position during winding and can be prevented effectively from the dry linting being cut to material and cut
The burr short-circuit state that cutter causes.
Accompanying drawing explanation
For the ease of it will be appreciated by those skilled in the art that with specific embodiment the present invention made below in conjunction with the accompanying drawings into
The explanation of one step.
Fig. 1 is positive pole bilateral structure of the present invention.
Fig. 2 is negative pole bilateral structure of the present invention.
Detailed description of the invention
As depicted in figs. 1 and 2, a kind of square coiled battery pole piece, by positive collector 7, negative collector 8 and
The positive pole being coated on positive collector 7, negative collector 8 applies district 2, negative pole applies district 6 and constitutes, described positive afflux
Body 7, negative collector 8 one edge are provided with evagination lug 4, and the root of described evagination lug 4 is provided with insulation compound and is coated with
Applying 5, described positive collector 7 both sides of the edge are provided with and the most minimum are left white 7.1, and negative collector 8 both sides of the edge are provided with negative
Minimum it is left white 8.1, described the most minimum be left white 7.1 and be left white on 8.1 posting insulating tape 3 with negative pole is little, described
Positive pole applies district 2 and a lateral edges the most minimum and is left white between 7.1 to be provided with and is left white greatly 1.Described the most minimum it is left white 7.1
Width is left white 8.1 width more than negative pole is little.Described 1 length that is left white greatly is equal to the length of core outermost one circle after winding
Degree.Described positive and negative electrode applies district 2,6 negative pole dressing edge after the coiling more than anode dressing edge 1-2mm.
The processing technology of the present invention, including closing slurry, coating, roll-in, trimming, rolling step, coated
Cheng Zhong, the most minimum 7.1 gaps that are left white are left white formula coating, being left white acupuncture treatment and aliging, and negative pole is little to be left white 8.1 and adopt
It is left white with edge, equity small-gap suture coating；Apply district 2 at positive pole after coating completes, that negative pole applies edge, district 6 is close
Chalaza is coated with insulation compound coating 5；During trimming, laser instrument uses sensing to be left white the rear cycle and cuts the mode of lug, with
Wind the dimensional directions into sheet and cut lug, the long error that is coated with during coating is characterized the afterbody of pole piece when winding,
Lug location bias when can effectively prevent lug from winding.
As shown in Figure 1, 2, this pole piece structure with four evagination lugs 4 contains dressing district, gap is left white
District, glue application region, edge and edge are left white district, and therefore carry out being left white with gap in coating process is reserved, enters
Row forward one-reverse one formula is coated with, and hopper width is biplate dressing width, is coated in the middle of collector,
Collector width is more than material width, and the width that laser cuts the lug length of lug is left on both sides.Coating is set up a little
Gluing equipment, at the continuous edge spot printing insulation paste of material, so far coating process completes.
Fig. 1, the evagination lug 4 shown in 2, its course of processing is: after the toasted roll-in of pole piece coating completed
Cut in the middle of dressing and obtain the pole piece without lug, with laser edge cutting machine, this pole piece is processed, laser trimming
Use sensing to be left white the rear cycle to become the programming that cuts of spacing and cut out the bases such as evagination lug 4, spacing technique therein
The lug alignment design of winding.Insulating tape 3, its course of processing is: by sensed for the pole piece after laser trimming
After being left white, the equipment to rubberizing carries out rubberizing process, and the pole piece simultaneously also reaching to cut positive sequence rewinds
Purpose.The pole piece of the most this multi pole ears completes, follow-up winding process and the one pole of present stage maturation
Ear winding technology is the most similar, only needs to change into judging after sensing is left white by judging after sensing lug.
Having in positive pole coating process and be left white greatly 1 gap applying structure, this region that is left white is in the battery core of winding
Become positive pole and be left white the form of outsourcing, this structure relative to the barrier film externally-packed structure of conventional multi pole ears core,
Many positive pole one side dressing of a circle in the case of negative electrode membrane consumption is constant, and only can increase positive plate
One side thickness, then can provide the dressing amount of bigger positive active material under certain space, improve
The capacity of battery, the capacity simultaneously increased does not has the increase of barrier film and negative material yet, in certain journey the most yet
The cost of battery is reduced on degree.Negative pole is different from the coating method of positive pole and allows for when negative pole inner ring uses
When winding cuts, the curling to non-material area can occur during the coating of one side, causing cannot be normal in winding process
Entering sheet, positive plate ending is left white design then to be affected without this.
Existing edge dispensing technology is used to apply 5 at the insulation compound of lug position spot printing width and thickness, should
Peak width design basis for during folding lug on crooked position with the presence of insulation dressing, be typically designed as
Positive pole 10mm, negative pole 8mm, this layer of insulation compound and dressing are combined closely, and improve lug to a certain extent
Intensity, and folding lug during play insulation prevent short-circuit state from occurring effect；Positive and negative minimum
Be left white position to patch insulating tape 3, cut in this position during winding can be prevented effectively from be cut to material dry linting and
The burr short-circuit state that cutting knife causes, and this sensing winds the form cut after being left white can be greatly simplified existing
After some induction pole ear spaces, coding calculates wraparound program and the equipment cutting position.
Claims (5)
1. a square coiled battery pole piece, by just, negative collector (7, 8) and be just coated on, negative collector (7, 8) on just, negative pole applies district (2, 6) constitute, it is characterized in that, described just, negative collector (7, 8) edge is provided with evagination lug (4), the root of described evagination lug (4) is provided with insulation compound coating (5), described positive collector (7) both sides of the edge are provided with and the most minimum are left white (7.1), negative collector (8) both sides of the edge are provided with that negative pole is little is left white (8.1), the most minimum described be left white (7.1) are left white on (8.1) posting insulating tape (3) with negative pole is little, described positive pole applies district (2) and a lateral edges the most minimum and is left white between (7.1) to be provided with and is left white greatly (1).
A kind of square coiled battery pole piece, it is characterised in that the most minimum described (7.1) width that is left white is left white (8.1) width more than negative pole is little.
A kind of square coiled battery pole piece, it is characterised in that described (1) length that is left white greatly is equal to the length of core outermost one circle after winding.
A kind of square coiled battery pole piece, it is characterised in that described positive and negative electrode applies district (2,6) negative pole dressing edge after the coiling more than anode dressing edge 1-2mm.
5. the processing technology of a square coiled battery pole piece as claimed in claim 1, including closing slurry, coating, roll-in, trimming, rolling step, it is characterized in that, in coating process, positive pole uses edge to be left white, and both sides are respectively adopted and are left white greatly (1), little (7.1) gap that is left white is left white formula coating, is left white acupuncture treatment alignment, little be left white (8.1) of negative pole use edge to be left white, equity small-gap suture coating；District (2,6) marginal fit spot printing insulation compound coating (5) is applied at positive and negative electrode after coating completes；During trimming, laser instrument uses sensing to be left white the rear cycle and cuts the mode of lug, cut lug winding the size interval direction into sheet, after insulating tape (3) is to patch operation, lug falls to continue and is easy to directly wind, the long error that is coated with during coating is characterized the afterbody of pole piece when winding, the location bias of lug after can effectively preventing from winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410276451.8A CN104167553B (en) | 2014-06-19 | 2014-06-19 | A kind of square coiled battery pole piece and processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410276451.8A CN104167553B (en) | 2014-06-19 | 2014-06-19 | A kind of square coiled battery pole piece and processing technology thereof |
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| Publication Number | Publication Date |
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| CN104167553A CN104167553A (en) | 2014-11-26 |
| CN104167553B true CN104167553B (en) | 2016-08-17 |
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| CN105514480B (en) * | 2016-02-01 | 2019-01-15 | 陈佩 | The packaging method of column lithium ion battery and negative pole end |
| CN105855325B (en) * | 2016-04-13 | 2018-04-10 | 合肥国轩高科动力能源有限公司 | A kind of lithium ion cell polar ear bends apparatus for correcting |
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| CN106169618A (en) * | 2016-09-29 | 2016-11-30 | 东莞市振华新能源科技有限公司 | A kind of positive/negative plate promoting electrokinetic cell safety and winding clad structure thereof |
| CN106848325B (en) * | 2017-02-15 | 2020-09-15 | 宁德时代新能源科技股份有限公司 | Secondary battery pole piece, preparation method thereof and winding type battery cell |
| CN109686912A (en) * | 2018-12-26 | 2019-04-26 | 蜂巢能源科技有限公司 | Battery pole piece and preparation method thereof, lithium ion battery |
| CN111755656A (en) | 2019-03-26 | 2020-10-09 | 宁德新能源科技有限公司 | Pole piece, battery core and battery |
| CN113036315A (en) * | 2019-12-25 | 2021-06-25 | 华为技术有限公司 | Battery and terminal equipment |
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| CN112103474A (en) * | 2020-09-15 | 2020-12-18 | 横店集团东磁股份有限公司 | Processing method of winding type lithium battery positive plate and winding type lithium battery positive plate |
| CN114447282A (en) * | 2020-10-30 | 2022-05-06 | 北京小米移动软件有限公司 | Pole piece, processing method thereof and lithium battery |
| CN112599725B (en) * | 2020-12-23 | 2022-03-25 | 深圳赛骄阳能源科技股份有限公司 | Method for improving rolling efficiency of lithium ion battery pole piece |
| CN114204036A (en) * | 2021-11-17 | 2022-03-18 | 合肥国轩高科动力能源有限公司 | Preparation method of composite current collector |
| CN115084429A (en) * | 2022-07-08 | 2022-09-20 | 珠海冠宇电池股份有限公司 | Positive plate and lithium ion battery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212039B (en) * | 2006-12-27 | 2010-08-25 | 比亚迪股份有限公司 | Battery pole plate, method for producing the battery pole plate, and pole plate core and secondary battery |
| CN101950816A (en) * | 2010-09-21 | 2011-01-19 | 奇瑞汽车股份有限公司 | Square power lithium ion battery cell and manufacturing method thereof |
| CN202363549U (en) * | 2011-12-15 | 2012-08-01 | 协鑫动力新材料（盐城）有限公司 | Winding-type lithium ion battery structure |
| CN102683751A (en) * | 2012-05-25 | 2012-09-19 | 浙江振龙电源股份有限公司 | High-capacity high-magnification square lithium ion power battery and manufacturing method thereof |
| CN102800842A (en) * | 2012-08-29 | 2012-11-28 | 因迪能源（苏州）有限公司 | Novel lithium-ion battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4205209B2 (en) * | 1998-07-02 | 2009-01-07 | 日機装株式会社 | Nonaqueous electrolyte secondary battery |
-
2014
- 2014-06-19 CN CN201410276451.8A patent/CN104167553B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212039B (en) * | 2006-12-27 | 2010-08-25 | 比亚迪股份有限公司 | Battery pole plate, method for producing the battery pole plate, and pole plate core and secondary battery |
| CN101950816A (en) * | 2010-09-21 | 2011-01-19 | 奇瑞汽车股份有限公司 | Square power lithium ion battery cell and manufacturing method thereof |
| CN202363549U (en) * | 2011-12-15 | 2012-08-01 | 协鑫动力新材料（盐城）有限公司 | Winding-type lithium ion battery structure |
| CN102683751A (en) * | 2012-05-25 | 2012-09-19 | 浙江振龙电源股份有限公司 | High-capacity high-magnification square lithium ion power battery and manufacturing method thereof |
| CN102800842A (en) * | 2012-08-29 | 2012-11-28 | 因迪能源（苏州）有限公司 | Novel lithium-ion battery |
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