CN207097950U - A kind of lithium battery containing new current collector - Google Patents
A kind of lithium battery containing new current collector Download PDFInfo
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- CN207097950U CN207097950U CN201720396718.6U CN201720396718U CN207097950U CN 207097950 U CN207097950 U CN 207097950U CN 201720396718 U CN201720396718 U CN 201720396718U CN 207097950 U CN207097950 U CN 207097950U
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- current collector
- plastic sheeting
- coating
- lithium battery
- pole piece
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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
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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
- 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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- Cell Electrode Carriers And Collectors (AREA)
Abstract
The utility model discloses a kind of lithium battery containing new current collector, including the anode pole piece, barrier film and cathode pole piece stacked gradually, anode pole piece contains plus plate current-collecting body, plus plate current-collecting body has sandwich construction, including the first plastic sheeting, the first bonding force enhancement layer, aluminum metal coating and the first antioxidation coating are coated with successively on the upper and lower surface of the first plastic sheeting；Cathode pole piece contains negative current collector, and negative current collector has sandwich construction, including the second plastic sheeting, and the second bonding force enhancement layer, copper metal coating and the second antioxidation coating are coated with successively on the upper and lower surface of the second plastic sheeting；There is positive active material between plus plate current-collecting body and barrier film；There is negative electrode active material between negative current collector and barrier film.The utility model can realize the lightweight of battery, improve energy density, reduce cost, and can make copper facing/aluminium lamination do not allow it is easy to fall off, do not allow it is oxidizable.
Description
Technical field
It the utility model is related to a kind of lithium battery containing new current collector.
Background technology
Conventional lithium ion battery negative current collector is copper foil, and plus plate current-collecting body is aluminium foil.With the development of lithium power technology, lithium
High-energy-density, lightweight and the flexibility of ion battery turn into the pursuit of people.Thinned copper/aluminium foil be (both positive and negative polarity collector
Gross mass accounts for 14%-18% of battery gross mass or so), the lightweight of lithium ion battery can be achieved, improve energy density, drop
Low cost, but due to the limitation of technology of preparing, the thickness of copper/aluminium foil be difficult reduce again (at present copper foil can volume production to 6 μm, aluminium foil
Can volume production to 8 μm)；After other copper/aluminium foil is thinning, mechanical strength reduces, and causes processing characteristics to reduce, it is therefore desirable to new
" thinning technique ".
Prior art, which has, is plated in copper/aluminium on plastics (such as PET) as collector to improve battery energy density, reduce
Cost, allow battery lightweight.But its copper-plated most thick degree is 1.5 μm, and the most thick degree aluminized is 2.0 μm of (either copper facing
Still aluminize, be required to certain thickness to reach gratifying electric conductivity), this is relative to conventional packaging material copper facing/aluminium
It is thick many for film thickness of coating, and coating is thicker, copper facing/aluminium lamination is easier to come off from plastics.
The surface of copper/aluminium foil needs to carry out anti-oxidation processing, because copper/aluminium foil directly contacts with negative pole/positive electrode, when
Between it is long after, can be by electrolytic corrosion, so as to reduce the service life of lithium ion battery.In addition, it has been found that plastic plating copper/
After aluminium, then traditional anti-oxidation method is used easily to cause coming off for copper/aluminium coat.
Utility model content
In view of this, to overcome above-mentioned technical problem, the purpose of this utility model is that battery can be realized by providing one kind
Lightweight, improve energy density, reduce cost, and can make copper facing/aluminium lamination do not allow it is easy to fall off, do not allow it is oxidizable containing new
The lithium battery of collector.
Used technical scheme is as follows：
A kind of lithium battery containing new current collector, including anode pole piece, barrier film and the cathode pole piece stacked gradually, it is described
Anode pole piece is formed by plus plate current-collecting body and coated in the positive active material for being used to participate in chemical reaction on plus plate current-collecting body；
The plus plate current-collecting body has sandwich construction, including the first plastic sheeting, on the upper and lower surface of first plastic sheeting successively
It is coated with the first bonding force enhancement layer, aluminum metal coating and the first antioxidation coating；The cathode pole piece is by negative current collector and coating
The negative electrode active material for being used to participate in chemical reaction on negative current collector is formed, and the negative current collector has multilayer knot
Structure, including the second plastic sheeting, the second bonding force enhancement layer, copper are coated with successively on the upper and lower surface of second plastic sheeting
The coat of metal and the second antioxidation coating；The positive active material is between the plus plate current-collecting body and the barrier film；It is described negative
Pole active material is between the negative current collector and the barrier film.
Further, first plastic sheeting or the second modeling film are OPP, PI, PET, CPP or PVC.
Further, the first bonding force enhancement layer or the second bonding force enhancement layer are metal coating or nonmetallic plating
Film, when for metal coating when, the metal is Ni；When for nonmetallic plated film when, it is described it is nonmetallic be SiC, Si3N4Or Al2O3。
Further, first antioxidation coating or the second antioxidation coating are fine and close metal levels or non-metallic layer, when for
During metal level, the metal is Ni；When for non-metallic layer when, it is described it is nonmetallic be Al2O3、Si3N4Or SiC.
Further, the thickness of first plastic sheeting or the second modeling film is 2-12 μm.
Further, the thickness of the first bonding force enhancement layer or the second bonding force enhancement layer is 10-100nm.
Further, the thickness of the copper metal coating is 100-1000nm, and the thickness of aluminum metal coating is 100-
2000nm。
Further, the thickness of first antioxidation coating or the second antioxidation coating is 10-100nm.
The beneficial effects of the utility model are,
(1) loss of weight is realized by plastic film layers, wherein aluminizer collector can realize loss of weight 50%, and thickness reduces
30%, copper plating film collector can realize loss of weight 70%, significantly improve battery energy density；
(2) plastic sheeting has stronger tensile strength as substrate so that the window such as the tension force in preparation section, pressure
Can be bigger, so as to stock up, section can use higher pressure to realize bigger compacted density, improve process manufacturing capacity；
(3) last layer bonding force enhancement layer is plated, coming off for copper/aluminum metal coating can be reduced, effectively can prevent copper metal from plating
Layer, which easily comes off, causes the performance of collector to be lost；
(4) copper foil current collector in original lithium battery is substituted with this new copper facing plastic foil collector, by traditional 6 μm
Pure copper foil be reduced to copper plate less than 1 μm, the dosage of copper greatly reduces, and collector cost can decline more than 50%.
(5) antioxidation coating obtained by the way of plated film, can solve the problems, such as that copper/aluminium coat comes off on plastics, simultaneously
Reach anti-oxidation purpose.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the lithium battery of the present utility model containing new current collector.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model preferred embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
It is shown in Figure 1, a kind of lithium battery containing new current collector of the present utility model, including the positive pole stacked gradually
Pole piece 1, barrier film 3 and cathode pole piece 2, the anode pole piece 1 contain plus plate current-collecting body 10, and the plus plate current-collecting body 10 has multilayer
Structure, including the first plastic sheeting 11, it is coated with the enhancing of the first bonding force successively on the upper and lower surface of first plastic sheeting 11
Layer 12, the antioxidation coating 14 of aluminum metal coating 13 and first；The cathode pole piece 2 contains negative current collector 20, the negative pole currect collecting
Body has sandwich construction, including the second plastic sheeting 21, and second is coated with successively on the upper and lower surface of second plastic sheeting 21
Bonding force enhancement layer 22, the antioxidation coating 24 of copper metal coating 23 and second.
There is positive active material 15 between plus plate current-collecting body 10 and barrier film 3；Anode pole piece 1 is by the He of plus plate current-collecting body 10
Formed coated in the positive active material 15 for being used to participate in chemical reaction on plus plate current-collecting body.
There is negative electrode active material 25 between negative current collector 20 and barrier film 3；Cathode pole piece 2 is by the He of negative current collector 20
Formed coated in the negative electrode active material 25 for being used to participate in chemical reaction on negative current collector.
For plus plate current-collecting body：
Loss of weight is realized by the first plastic film layers, wherein aluminizer collector can realize loss of weight 50%, and thickness reduces
30%, significantly improve battery energy density.First plastic sheeting is preferably OPP, PI, PET, CPP or PVC.Wherein OPP is orientation
Oriented polypropylene plastics；PI is polyimide plastic；PET is polyethylene terephthalate plastics, CPP is cast polypropylene
Plastics, PVC are igelite.Further preferred PET, PI, CPP；The thickness of first plastic sheeting is preferably 2-12 μm, is entered
One step is preferably 6-10 μm.120-300 DEG C of the temperature tolerance of first plastic sheeting.
Last layer the first bonding force enhancement layer is plated, coming off for aluminum metal coating can be reduced, can effectively prevent aluminum metal coating
Easily coming off causes the performance of collector to be lost.The first bonding force enhancement layer is preferably metal coating or nonmetallic plated film, when
For metal coating when, the metal is Ni；When for nonmetallic plated film when, it is described it is nonmetallic be SiC, Si3N4Or Al2O3, further
Preferably Al2O3。Al2O3Preferable with the adhesive property of the first plastic film layers and aluminum metal coating, such aluminium coated is less susceptible to take off
Fall.The thickness of first bonding force enhancement layer is preferably 10-100nm, more preferably 10-50nm.
The thickness of aluminum metal coating can be 100-2000nm, more preferably 500-1000nm.
The effect of first antioxidation coating or purpose are to prevent aluminum metal coating to be oxidized.First antioxidation coating can be
Fine and close metal level or non-metallic layer, when for metal level when, the metal is Ni；When for non-metallic layer when, it is described nonmetallic to be
Al2O3、Si3N4Or SiC, more preferably Al2O3.When obtaining the first antioxidation coating by the way of plated film, can solve to mould
The problem of aluminium coat comes off on material, while reach anti-oxidation purpose.The thickness of first antioxidation coating can be 10-100nm, can enter
One step is preferably 10-50nm.
For negative current collector：
Loss of weight is realized by the second plastic film layers, wherein, copper plating film collector can realize loss of weight 70%, significantly improve electricity
Pond energy density.Second plastic sheeting is preferably OPP, PI, PET, CPP or PVC.Wherein OPP is orientation stretching polypropylene plastics；
PI is polyimide plastic；PET is polyethylene terephthalate plastics, CPP is cast polypropylene plastics, PVC is polychlorostyrene
Vinyl plastics.Further preferred PET, PI, CPP；The thickness of second plastic sheeting is preferably 2-12 μm, more preferably 4-8 μ
m.The temperature tolerance of second plastic sheeting is 120-300 DEG C.
Last layer the second bonding force enhancement layer is plated, coming off for copper metal coating can be reduced, can effectively prevent copper metal coating
Easily coming off causes the performance of collector to be lost.The second bonding force enhancement layer is preferably metal coating or nonmetallic plated film, when
For metal coating when, the metal is Ni；When for nonmetallic plated film when, it is described it is nonmetallic be SiC, Si3N4Or Al2O3, further
Preferably Al2O3.Ni or Al2O3Preferable with the adhesive property of the second plastic film layers and copper metal coating, such copper plate is less
It is easy to fall off.The thickness of second bonding force enhancement layer is preferably 10-100nm, more preferably 10-50nm.
The thickness of copper metal coating can be 100-1000nm, more preferably 200-600nm；Replaced by this copper current collector
For the copper foil current collector in original lithium battery, the copper plate less than 1 μm, the dosage of copper are reduced to by 6 μm traditional of pure copper foil
Greatly reduce, collector cost can decline more than 50%.
The effect of second antioxidation coating or purpose are to prevent copper metal coating to be oxidized.Second antioxidation coating can be
Fine and close metal level or non-metallic layer, when for metal level when, the metal is Ni；When for non-metallic layer when, it is described nonmetallic to be
Al2O3、Si3N4Or SiC, more preferably Al2O3.When obtaining the second antioxidation coating by the way of plated film, can solve to mould
The problem of copper coating comes off on material, while reach anti-oxidation purpose.The thickness of second antioxidation coating can be 10-100nm, can enter
One step is preferably 10-50nm.
A kind of preparation method for being somebody's turn to do the lithium battery containing new current collector is provided, it may include following steps：
S1. after plus plate current-collecting body prepares, by anode sizing agent coated on plus plate current-collecting body, positive pole is obtained after vacuum drying
Pole piece；S2. after negative current collector prepares, by cathode size coated on negative current collector, negative pole pole is obtained after vacuum drying
Piece；S3. anode pole piece, barrier film, cathode pole piece are laminated successively, after laminated aluminum film, electrolyte are injected, to plastic-aluminum
Film carries out packaging by hot pressing, obtains lithium ion battery.
Wherein anode sizing agent is positive active material；Cathode size is negative electrode active material.
The beneficial effects of the utility model can be found in utility model content part, and here is omitted.
The a series of detailed description of those listed above is only for the specific of possible embodiments of the present utility model
Illustrate, they simultaneously be not used to limit the scope of protection of the utility model, it is all without departing from the utility model skill spirit made etc.
Effect embodiment or change should be included within the scope of protection of the utility model.
Claims (7)
1. a kind of lithium battery containing new current collector, it is characterised in that including the anode pole piece, barrier film and negative pole stacked gradually
Pole piece, the anode pole piece is by plus plate current-collecting body and coated in the positive-active for being used to participate in chemical reaction on plus plate current-collecting body
Material is formed；The plus plate current-collecting body has sandwich construction, including the first plastic sheeting, first plastic sheeting it is upper,
Lower surface is coated with the first bonding force enhancement layer, aluminum metal coating and the first antioxidation coating successively；The cathode pole piece is by negative pole collection
Fluid and formed coated in the negative electrode active material for being used to participate in chemical reaction on negative current collector, negative current collector tool
There are sandwich construction, including the second plastic sheeting, be coated with the increasing of the second bonding force successively on the upper and lower surface of second plastic sheeting
Strong layer, copper metal coating and the second antioxidation coating；The positive active material is between the plus plate current-collecting body and the barrier film；
The negative electrode active material is between the negative current collector and the barrier film；The first bonding force enhancement layer or the second bonding
Power enhancement layer is metal coating or nonmetallic plated film, when for metal coating when, the metal is N i；When for nonmetallic plated film when,
It is described it is nonmetallic be S i C, S i3N4Or A l2O3。
2. the lithium battery according to claim 1 containing new current collector, it is characterised in that first plastic sheeting or
Second modeling film is OPP, PI, PET, CPP or PVC.
3. the lithium battery according to claim 1 containing new current collector, it is characterised in that first antioxidation coating or
Second antioxidation coating is fine and close metal level or non-metallic layer, when for metal level when, the metal is N i；When for non-metallic layer
When, it is described it is nonmetallic be A l2O3、S i3N4Or S i C.
4. the lithium battery according to claim 1 containing new current collector, it is characterised in that first plastic sheeting or
The thickness of second modeling film is 2-12 μm.
5. the lithium battery according to claim 1 containing new current collector, it is characterised in that the first bonding force enhancing
The thickness of layer or the second bonding force enhancement layer is 10-100nm.
6. the lithium battery according to claim 1 containing new current collector, it is characterised in that the thickness of the copper metal coating
Spend for 100-1000nm, the thickness of aluminum metal coating is 100-2000nm.
7. the lithium battery according to claim 1 containing new current collector, it is characterised in that first antioxidation coating or
The thickness of second antioxidation coating is 10-100nm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720396718.6U CN207097950U (en) | 2017-04-14 | 2017-04-14 | A kind of lithium battery containing new current collector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720396718.6U CN207097950U (en) | 2017-04-14 | 2017-04-14 | A kind of lithium battery containing new current collector |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108531876A (en) * | 2018-03-26 | 2018-09-14 | 安徽金美新材料科技有限公司 | A kind of coating process flow for lithium battery collector |
| CN111048789A (en) * | 2019-12-26 | 2020-04-21 | 珠海冠宇电池有限公司 | Current collector and preparation method and application thereof |
| CN111129505A (en) * | 2020-01-21 | 2020-05-08 | 合肥国轩高科动力能源有限公司 | Lithium battery using light current collector |
| WO2020211452A1 (en) * | 2019-04-15 | 2020-10-22 | 宁德时代新能源科技股份有限公司 | Positive pole piece, electrochemical device and device |
| WO2020232237A1 (en) * | 2019-05-15 | 2020-11-19 | Energizer Brands, Llc | Current interrupt for electrochemical cells |
| CN113270589A (en) * | 2021-05-25 | 2021-08-17 | 厦门海辰新能源科技有限公司 | Lithium ion battery, bipolar current collector and manufacturing method thereof |
| CN113422104A (en) * | 2021-06-22 | 2021-09-21 | 天目湖先进储能技术研究院有限公司 | Implantable lithium ion battery capable of discharging to zero volt |
| JP2022506970A (en) * | 2018-11-09 | 2022-01-17 | 星耀科技（深▲せん▼）有限公司 | Membrane and manufacturing process |
| CN115986126A (en) * | 2021-10-14 | 2023-04-18 | 宁德时代新能源科技股份有限公司 | Pole piece and preparation method thereof, secondary battery, battery module, battery pack and electric device |
-
2017
- 2017-04-14 CN CN201720396718.6U patent/CN207097950U/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108531876A (en) * | 2018-03-26 | 2018-09-14 | 安徽金美新材料科技有限公司 | A kind of coating process flow for lithium battery collector |
| JP2022506970A (en) * | 2018-11-09 | 2022-01-17 | 星耀科技（深▲せん▼）有限公司 | Membrane and manufacturing process |
| JP7378838B2 (en) | 2018-11-09 | 2023-11-14 | 星耀科技（深▲せん▼）有限公司 | Current collector of energy storage element and method for manufacturing current collector of energy storage element |
| US11721812B2 (en) | 2018-11-09 | 2023-08-08 | Xingyao Technology (Shenzhen) Co., Ltd | Film and manufacturing process thereof |
| WO2020211452A1 (en) * | 2019-04-15 | 2020-10-22 | 宁德时代新能源科技股份有限公司 | Positive pole piece, electrochemical device and device |
| WO2020232237A1 (en) * | 2019-05-15 | 2020-11-19 | Energizer Brands, Llc | Current interrupt for electrochemical cells |
| US11081763B2 (en) | 2019-05-15 | 2021-08-03 | Energizer Brands, Llc | Current interrupt for electrochemical cells |
| CN111048789A (en) * | 2019-12-26 | 2020-04-21 | 珠海冠宇电池有限公司 | Current collector and preparation method and application thereof |
| CN111129505B (en) * | 2020-01-21 | 2022-03-11 | 合肥国轩高科动力能源有限公司 | Lithium battery using light current collector |
| CN111129505A (en) * | 2020-01-21 | 2020-05-08 | 合肥国轩高科动力能源有限公司 | Lithium battery using light current collector |
| CN113270589A (en) * | 2021-05-25 | 2021-08-17 | 厦门海辰新能源科技有限公司 | Lithium ion battery, bipolar current collector and manufacturing method thereof |
| CN113422104A (en) * | 2021-06-22 | 2021-09-21 | 天目湖先进储能技术研究院有限公司 | Implantable lithium ion battery capable of discharging to zero volt |
| CN113422104B (en) * | 2021-06-22 | 2022-06-17 | 天目湖先进储能技术研究院有限公司 | Implantable lithium ion battery capable of discharging to zero volt |
| CN115986126A (en) * | 2021-10-14 | 2023-04-18 | 宁德时代新能源科技股份有限公司 | Pole piece and preparation method thereof, secondary battery, battery module, battery pack and electric device |
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Effective date of registration: 20181119 Address after: 352100 Xingang Road, Zhangwan Town, Jiaocheng District, Ningde, Fujian 2 Patentee after: Contemporary Amperex Technology Co.,Ltd. Address before: 518000 West Block 611A, 202 Tairan Industrial Park, Shatou Street, Futian District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN XINZHIMEI TECHNOLOGY CO.,LTD. |