CN207664142U - Laminated lithium ion battery and its pole piece - Google Patents
Laminated lithium ion battery and its pole piece Download PDFInfo
- Publication number
- CN207664142U CN207664142U CN201721925074.1U CN201721925074U CN207664142U CN 207664142 U CN207664142 U CN 207664142U CN 201721925074 U CN201721925074 U CN 201721925074U CN 207664142 U CN207664142 U CN 207664142U
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- Prior art keywords
- face
- collector
- surface density
- coating
- lithium ion
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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
Abstract
The utility model is related to field of lithium ion battery, disclose a kind of laminated lithium ion battery and its pole piece being suitable for ultrathin lithium ion battery.It includes：Collector is coated with polar active in the first face of the collector, is coated with the polar active in the second face of the collector, the surface density of the coating in second face is less than the coating surface density in first face.The curling problem of the ultrathin lithium ion battery of the prior art is advantageously accounted for using the present embodiment.
Description
Technical field
The utility model is related to lithium ion battery manufacturing field more particularly to a kind of laminated lithium ion batteries and its pole piece.
Background technology
With Intelligent Bank card, RFID electronic label, Medical Devices, the development of the ultrathin products such as intelligent traffic administration system is right
The demand of slimline battery is also more and more.The characteristics of slimline battery is that thickness is less than 1mm, thin like paper, it is desirable that cycle
Performance is good, low from power consumption, has a safety feature.
Current thin battery is in addition to using positive and negative anodes other than ultra-thin raw material, are usually used each a piece of, three layers of diaphragm
Mode carry out lamination making.
This technique positive and negative anodes pole piece only has one side to play capacity, but if only coating a face pole piece can crimp, no legal system
Make.
Utility model content
The first purpose of the utility model embodiment is to provide a kind of laminated lithium ion battery and its pole piece, is conducive to keep away
The problem of exempting from pole piece coiling.
In a first aspect, a kind of laminated lithium ion battery pole piece that the utility model embodiment provides, including：Collector,
It is coated with polar active in the first face of the collector, the polar active is coated in the second face of the collector
Substance, the surface density of the coating in second face are less than the coating surface density in first face.
Optionally, the surface density of the coating in second face is the 20% to 50% of the coating surface density in first face.
Optionally, the surface density of the coating in second face is the 30% to 40% of the coating surface density in first face,
Optionally, the coating thickness in second face is less than the coating thickness in first face.
Second aspect, the utility model embodiment provide a kind of laminated lithium ion battery, including：
Positive plate, including the first collector, be respectively coated on the first face and the second face of first collector by
Positive polar material layer, the surface density of the coating in second face are less than the coating surface density in first face；
Negative plate, including the second collector, be respectively coated on the first face and the second face of second collector by
Positive polar material layer, the surface density of the coating in second face are less than the coating surface density in first face；
Diaphragm is spaced between the positive plate and the negative plate；
Wherein, the first face of first collector and the first face of second collector face.
Optionally, the coating surface density in the second face of first collector is the painting in the first face of first collector
The 20% to 50% of clad can density.
Optionally, the coating surface density in the second face of first collector is the painting in the first face of first collector
The 30% to 40% of clad can density.
Optionally, the coating surface density in the second face of second collector is the painting in the first face of second collector
The 20% to 50% of clad can density.
Optionally, the coating surface density in the second face of second collector is the painting in the first face of second collector
The 30% to 40% of clad can density.
Optionally, the coating thickness in second face of the positive plate, and/or negative plate is less than the painting in first face
Cover thickness.
Optionally, the positive plate tiling is embedded in diaphragm bag,
Diaphragm is separated between the positive plate and the negative plate, specifically,
Merging has the diaphragm bag of the positive plate to be mutually laminated with the negative plate.
Optionally, the positive plate, which is hot pressed or sews, is fixed in the diaphragm bag.
Therefore using the utility model embodiment technical solution, polar material is coated by the one side in pole piece, separately
It is also coated on one side, and keeps the coating surface density in the face smaller, not only improve the thickness for reducing battery in this way, and can keep away
Exempt from pole piece curling.Especially suitable for extra-thin lithium ion battery, experiment proves the present embodiment technical solution, using this technology,
The ultrathin lithium ion battery of 0.3-0.5mm thickness can be made.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
It does not constitute improper limits to the present invention.
Fig. 1 is a kind of cross-sectional structure signal for laminated lithium ion battery pole piece that the utility model embodiment 1 provides
Figure；
Fig. 2 is a kind of cross-sectional structure schematic diagram for positive plate diaphragm bag that the utility model embodiment 1 provides；
Fig. 3 is that the cross section for being entered battery core bodies made of bag technique using positive plate that the utility model embodiment 1 provides is tied
Structure schematic diagram.
Fig. 4 is a kind of ultrathin lithium ion battery dimensional structure diagram that the utility model embodiment 1 provides；
Fig. 5 is the main structure diagram of Fig. 4；
Fig. 6 is the side structure schematic diagram of Fig. 4.
Specific implementation mode
The utility model is described in detail below in conjunction with attached drawing and specific embodiment, in the signal of this utility model
Property embodiment and explanation be used for explaining the utility model, but be not intended to limit the scope of the present invention.
Embodiment 1
It is shown in Figure 1, a kind of laminated lithium ion battery pole piece is present embodiments provided, includes mainly：Collector
100, it is coated with polar active (being denoted as first coating 101) in the one side (being denoted as the first face) of collector 100, in collector
100 another side (being denoted as the second face) is also coated with identical polar active (being denoted as second coating 102), still, second
The surface density of the coating of coating 102 is less than the coating surface density of first coating 101, i.e. coating thickness is less than first coating 101
Coating thickness.
It is unrestricted as the signal of the present embodiment, the inventors discovered that the surface density of the coating of second coating 102 is less than
Its coating surface density 20% to 50% of the coating surface density of first coating 101.
It is unrestricted as the signal of the present embodiment, the inventors discovered that the surface density of the coating of second coating 102 is less than
It coats the optimal embodiment that surface density 30% to 40% is the utility model to the coating surface density of first coating 101, tests
It proves, using the surface density design scheme, best equilibrium can be obtained avoiding pole piece from crimping and reduce on pole piece thickness, really
It protects on the basis of avoiding pole piece coiling, obtains most thin pole piece thickness, obtain best technique effect.
Wherein, when above-mentioned pole piece be positive plate when, can choose aluminium foil be used as collector 100, both sides coat
Material is positive electrode active materials slurry.
When above-mentioned pole piece is negative plate 301, copper foil material can be chosen as collector 100, the material of both sides coating
Material is negative active material slurry.
Present embodiments provide it is a kind of using positive plate shown in FIG. 1 (being denoted as 201), negative plate (being denoted as 202) and be made
A kind of ultrathin lithium ion battery.So that positive plate, negative plate is layered on top of each other, and be spaced diaphragm therebetween, make positive plate,
The larger first coating 101 of the surface density that is coated on negative plate is facing each other, and the polar material for keeping coating surface density high participates in electricity
Solution chemical reaction.
Therefore using the present embodiment technical solution, by coating polar material in the one side of pole piece, another side carries out
Coating, and keep the coating surface density in the face smaller, the thickness for reducing battery is not only improved in this way, and can avoid pole piece roll
It is bent.Especially suitable for extra-thin lithium ion battery.Experiment proves, using this technology, can make the ultra-thin of 0.3-0.5mm thickness
Lithium ion battery.
Unrestricted as the signal of the present embodiment, shown in Fig. 2,3, the present embodiment may be used will be as shown in Figure 1
The tiling of positive plate 201 be embedded in diaphragm bag 202 and form positive plate diaphragm bag, the technique sewed using hot pressing or comprehensively,
Positive plate 201 is fixed in diaphragm bag 202, pole piece is avoided to move.Then, by the positive plate diaphragm bag shown in Fig. 2 and knot
Structure negative plate 301 as shown in Figure 1 is laminated, and make positive plate 201, the surface density coated on negative plate 301 it is larger first
The battery core bodies facing each other that can be obtained ultrathin lithium ion battery as shown in Figure 3 of coating 101, are obtaining electricity shown in Fig. 3
Tab welding, aluminum plastic film encapsulation are carried out after core again to get ultrathin lithium ion battery shown in Fig. 4-6.
To sum up, using the present embodiment technical solution, not only improve reduces ultrathin lithium ion battery compared with the existing technology
Thickness in turn ensures that pole piece is not curled；
In addition, being placed in the technical solution of diaphragm bag using positive plate 201, be conducive to further increase this ultra-thin lithium-ion electric
The safety in pond.
Embodiments described above does not constitute the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution made by within the spirit and principle of mode
Within enclosing.
Claims (12)
1. a kind of laminated lithium ion battery pole piece, including：Collector is coated with polar active in the first face of the collector
Substance is coated with the polar active in the second face of the collector, and the surface density of the coating in second face is less than
The coating surface density in first face.
2. laminated lithium ion battery pole piece according to claim 1, characterized in that
The surface density of the coating in second face is the 20% to 50% of the coating surface density in first face.
3. laminated lithium ion battery pole piece according to claim 2, characterized in that
The surface density of the coating in second face is the 30% to 40% of the coating surface density in first face.
4. laminated lithium ion battery pole piece according to claim 2, characterized in that
The coating thickness in second face is less than the coating thickness in first face.
5. a kind of laminated lithium ion battery, characterized in that including：
Positive plate, including the first collector are respectively coated on the first face and the second face of first collector by anode
Polar material layer, the surface density of the coating in second face are less than the coating surface density in first face；
Negative plate, including the second collector are respectively coated on the first face and the second face of second collector by anode
Polar material layer, the surface density of the coating in second face are less than the coating surface density in first face；
Diaphragm is spaced between the positive plate and the negative plate；
Wherein, the first face of first collector and the first face of second collector face.
6. laminated lithium ion battery according to claim 5, characterized in that
The coating surface density in the second face of first collector is the coating surface density in the first face of first collector
20% to 50%.
7. laminated lithium ion battery according to claim 6, characterized in that
The coating surface density in the second face of first collector is the coating surface density in the first face of first collector
30% to 40%.
8. laminated lithium ion battery according to claim 5, characterized in that
The coating surface density in the second face of second collector is the coating surface density in the first face of second collector
20% to 50%.
9. laminated lithium ion battery according to claim 8, characterized in that
The coating surface density in the second face of second collector is the coating surface density in the first face of second collector
30% to 40%.
10. laminated lithium ion battery according to claim 5, characterized in that
The coating thickness in second face of the positive plate, and/or negative plate is less than the coating thickness in first face.
11. laminated lithium ion battery according to claim 5, characterized in that
The positive plate tiling is embedded in diaphragm bag,
Diaphragm is separated between the positive plate and the negative plate, specifically,
Merging has the diaphragm bag of the positive plate to be mutually laminated with the negative plate.
12. laminated lithium ion battery according to claim 11, characterized in that
The positive plate, which is hot pressed or sews, to be fixed in the diaphragm bag.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710094257 | 2017-02-21 | ||
| CN2017100942571 | 2017-02-21 |
Publications (1)
| Publication Number | Publication Date |
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| CN207664142U true CN207664142U (en) | 2018-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711489972.1A Pending CN108232110A (en) | 2017-02-21 | 2017-12-29 | Laminated lithium ion battery and its pole piece |
| CN201721925074.1U Active CN207664142U (en) | 2017-02-21 | 2017-12-29 | Laminated lithium ion battery and its pole piece |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108232110A (en) * | 2017-02-21 | 2018-06-29 | 深圳市格瑞普电池有限公司 | Laminated lithium ion battery and its pole piece |
| CN109346779A (en) * | 2018-09-19 | 2019-02-15 | 惠州亿纬锂能股份有限公司 | Battery core main body and preparation method thereof, slimline battery and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524712A (en) * | 2018-09-21 | 2019-03-26 | 东莞市伟升机械设备科技有限公司 | Slimline battery and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5046517B2 (en) * | 2005-12-22 | 2012-10-10 | プライムアースＥｖエナジー株式会社 | Manufacturing method and manufacturing apparatus for battery electrode plate |
| 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 |
| CN104701569B (en) * | 2015-03-12 | 2018-03-23 | 深圳市格瑞普电池有限公司 | The pole piece and pole piece preparation technology and coating machine of bent lithium ion battery and the battery |
| CN204760488U (en) * | 2015-04-24 | 2015-11-11 | 深圳市格瑞普电池有限公司 | Lithium ion battery who does not have diaphragm and pole piece thereof |
| CN104916811A (en) * | 2015-04-24 | 2015-09-16 | 深圳市格瑞普电池有限公司 | Non-diaphragm lithium ion battery and pole piece thereof |
| CN104882635A (en) * | 2015-05-30 | 2015-09-02 | 深圳市格瑞普电池有限公司 | Laminated lithium ion battery, battery pack comprising same and pole piece of laminated lithium ion battery |
| CN105977543A (en) * | 2016-07-05 | 2016-09-28 | 东莞市卓高电子科技有限公司 | Flexible battery |
| CN205810978U (en) * | 2016-07-05 | 2016-12-14 | 东莞市卓高电子科技有限公司 | Flexible battery |
| CN108232110A (en) * | 2017-02-21 | 2018-06-29 | 深圳市格瑞普电池有限公司 | Laminated lithium ion battery and its pole piece |
-
2017
- 2017-12-29 CN CN201711489972.1A patent/CN108232110A/en active Pending
- 2017-12-29 CN CN201721925074.1U patent/CN207664142U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108232110A (en) * | 2017-02-21 | 2018-06-29 | 深圳市格瑞普电池有限公司 | Laminated lithium ion battery and its pole piece |
| CN109346779A (en) * | 2018-09-19 | 2019-02-15 | 惠州亿纬锂能股份有限公司 | Battery core main body and preparation method thereof, slimline battery and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108232110A (en) | 2018-06-29 |
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