CN208478466U - A kind of ultra-thin battery core and ultrathin lithium ion battery - Google Patents
A kind of ultra-thin battery core and ultrathin lithium ion battery Download PDFInfo
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- CN208478466U CN208478466U CN201821112111.1U CN201821112111U CN208478466U CN 208478466 U CN208478466 U CN 208478466U CN 201821112111 U CN201821112111 U CN 201821112111U CN 208478466 U CN208478466 U CN 208478466U
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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
Abstract
The utility model belongs to technical field of lithium ion, more particularly to a kind of ultra-thin battery core, battery core includes several electrode films and several negative electrode plates, and through-thickness negative electrode plate and electrode film are stacked alternately, diaphragm is provided between adjacent negative electrode plate and electrode film, electrode slice on the outermost side is not curled single-side electrode piece, the not curled single-side electrode piece includes collector, conducting resinl and active layer, and the active layer is by the conductive adhesive on the medial surface of the collector.The utility model also provides a kind of ultrathin lithium ion battery, and including aluminum plastic film and the battery core being set in aluminum plastic film, the battery core is above-mentioned ultra-thin battery core.Ultra-thin battery core provided by the utility model does not need additionally to increase cell thickness, does not waste material, and single-side electrode is not in crimp during roll-in, facilitates following process ultrathin lithium ion battery.
Description
Technical field
The utility model belongs to technical field of lithium ion, and in particular to a kind of ultra-thin battery core and ultra-thin lithium-ion electric
Pond.
Background technique
With the development of science and technology, the development of electronic product increasingly minimizes, required battery is also smaller and smaller, more next
It is thinner, such as the lithium ion battery that intelligent cards use, it is necessary to it is very thin.Ultrathin lithium ion battery refers to that thickness is less than 2mm
Lithium ion battery, ultra-thin battery core refer to for thickness less than 2mm lithium ion battery battery core.
The battery core of existing lithium ion battery is usually the lamination knot that cathode, diaphragm, anode, diaphragm, cathode are set gradually
Structure, and the collector two sides of cathode is coated with active material, two outermost active materials of cathode are not involved in reaction, they
In the presence of will increase cell thickness, the problem of wasting material also will cause；If but only coat single side active material, then in roll-in
Cheng Zhong, it may appear that electrode crimp influences subsequent processing.Therefore, one kind is designed neither to increase cell thickness, do not waste material
Expect, is not in again crimp in electrode nipping process, facilitates ultra-thin battery core of following process and preparation method thereof, ultra-thin lithium
Ion battery, to overcome the above problem.
Summary of the invention
In order to overcome the shortcomings of the prior art described above, the purpose of the utility model is to provide a kind of ultra-thin battery core and systems
Preparation Method, ultrathin lithium ion battery and preparation method, not only can reduce cell thickness and cost of manufacture, additionally it is possible to electrode be made to exist
Be not in crimp in nipping process, facilitate following process.
To achieve the above object, the technical solution of the utility model be a kind of ultra-thin battery core, including several electrode films and
Several negative electrode plates, and negative electrode plate described in through-thickness and the electrode film are stacked alternately, the adjacent negative electrode
Be provided with diaphragm between piece and the electrode film, electrode slice on the outermost side is not curled single-side electrode piece, it is described not
The single-side electrode piece of curling includes collector, conducting resinl and active layer, and the active layer is by the conductive adhesive described
On the medial surface of collector.
Further, wherein the outermost electrode slice of side is not curled single side negative electrode plate；It is described not curled
Single side negative electrode plate includes negative current collector, conducting resinl and negative electrode active layer, and the negative electrode active layer passes through the conductive gluing
It connects on the medial surface of the negative current collector.
Further, the outermost electrode slice of other side is not curled single side electrode film；It is described not curled
Single side electrode film includes plus plate current-collecting body, conducting resinl and positive-active layer, and the positive-active layer passes through the conductive gluing
It connects on the medial surface of the plus plate current-collecting body.
Further, the outermost electrode slice of other side is not curled single side negative electrode plate.
Further, the conducting resinl with a thickness of 0.1~5 μm.
Further, the electrode slice between two on the outermost side not curled single-side electrode pieces is conventional two-sided painting
Cover the electrode slice of active material.
The utility model also provides a kind of ultrathin lithium ion battery, including aluminum plastic film and the battery core being set in aluminum plastic film,
The battery core is above-mentioned ultra-thin battery core.
The principles of the present invention are:
Conventional single-side electrode is that active layer is applied directly to collector single side, and before roll-in, this body structure of active layer is opposite
Fluffy, in nipping process, active layer has certain extension, but collector will not extend, and collector has active layer a at this time
The stress of constraint eventually leads to electrode curling due to the extension of active layer and the constraint of collector；Conventional double-face electrode is to collect
Fluid dual coating active layer, then in nipping process, the active layer on two sides offsets each other stress, and electrode will not crimp at this time,
If will affect cell thickness using the electrode of dual coating as outermost lateral electrode, and cause waste of material.The utility model is pre-
First by the active layer of the self-supporting pole piece roll-in of active material to predetermined thickness, active layer is then pasted on by collection by conducting resinl
On the surface of fluid side, influence of the stress to electrode can be eliminated, simultaneously, it is contemplated that the rebound of active layer thickness, then carry out one
After secondary light roller, that is, it can guarantee that active layer and being bonded for collector are close, and the electric conductivity between active layer and collector can be enhanced, together
When, electrode will not crimp.
Compared with prior art, the utility model has the beneficial effects that
(1) ultrathin lithium ion battery provided by the utility model is using not curled single-side electrode piece as ultra-thin battery core
Outermost electrode slice, the collector of not curled single-side electrode piece is only equipped with active layer in the side for participating in reaction, not
The side for participating in reaction is not coated by active material or other substances, can reduce cell thickness and cost of manufacture；
(2) ultra-thin battery core provided by the utility model by discharging pole for the self-supporting pole piece roll-in of active material in advance
The stress that piece extension generates, then collection liquid surface is pasted on by conducting resinl, solve the curling in single-side electrode nipping process
Problem facilitates following process ultrathin lithium ion battery.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the preparation flow figure for the ultrathin lithium ion battery that the utility model embodiment three provides；
Fig. 2 is the structural schematic diagram of the ultrathin lithium ion battery for a pair of of piece that the utility model embodiment five provides；
Fig. 3 is the structural schematic diagram of the ultrathin lithium ion battery for two pairs of pieces that the utility model embodiment six provides；
In figure: 1, plus plate current-collecting body, 2, conducting resinl, 3, positive-active layer, 4, diaphragm, 5, negative electrode active layer, 6, cathode collection
Fluid.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
All other embodiment obtained, fall within the protection scope of the utility model.
Embodiment one
The present embodiment provides a kind of ultra-thin battery core, including several electrode films and several negative electrode plates, and through-thickness
The negative electrode plate and the electrode film are stacked alternately, and are provided between the adjacent negative electrode plate and the electrode film
Diaphragm, electrode slice on the outermost side be not curled single-side electrode piece, the not curled single-side electrode piece include collector,
Conducting resinl and active layer, the active layer is by the conductive adhesive on the medial surface of the collector.The utility model
The outermost electrode slice of the two sides of the ultra-thin battery core through-thickness provided is not curled single-side electrode piece, this is not curled
Single-side electrode piece collector only participate in reaction side be equipped with active layer, be not coated by work in the side for being not involved in reaction
Property material or other substances, can reduce cell thickness and cost of manufacture.
Further, wherein the outermost electrode slice of side is not curled single side negative electrode plate；It is described not curled
Single side negative electrode plate includes negative current collector, conducting resinl and negative electrode active layer, and the active layer is existed by the conductive adhesive
On the medial surface of the collector.
As a kind of implementation of the present embodiment, the outermost electrode slice of other side is not curled single side positive electricity
Pole piece；The not curled single side electrode film includes plus plate current-collecting body, conducting resinl and positive-active layer, the positive-active layer
Through the conductive adhesive on the medial surface of the plus plate current-collecting body.
As another implementation of the present embodiment, the outermost electrode slice of other side is negative for not curled single side
Electrode slice.The outermost not curled single side negative electrode plate of the wherein side of battery core through-thickness, other side it is outermost
The electrode slice of side can be not curled single side electrode film, be also possible to the outermost not curled single side with side therein
Negative electrode plate structure is the same, and the not curled single side negative electrode plate being oppositely arranged.
Further, the conducting resinl with a thickness of 0.1~5 μm.Conducting resinl be PVDF(Kynoar), SBR(butylbenzene
Rubber), CMC(carboxymethyl cellulose) in any one mixture with conductive agent.
Further, the electrode slice between two not curled single-side electrode pieces is conventional dual coating active matter
The electrode slice of matter.
Embodiment two
The present embodiment provides a kind of preparation methods of above-mentioned ultra-thin battery core, include the following steps:
1) according to the compacted density of active material, roll-in is carried out to its self-supporting pole piece, reaches scheduled thickness, is made
Obtain active layer；Each active material has a compacted density, can calculate the thickness after its roll-in according to formula；
2) one layer of conducting resinl is uniformly coated on the surface of collector side using silk stick or coating device；
3) it is layed in active layer obtained in step 1) is smooth on the conducting resinl surface again, single-side electrode is made；
4) single-side electrode obtained in step 3) is toasted into 10~120min at 80~200 DEG C, then using roll squeezer 1
Not curled single-side electrode piece is made in ~ 10MPa roll-in；
5) most using not curled single-side electrode piece obtained in step 4) as the two sides of ultra-thin battery core through-thickness
The electrode slice in outside prepares ultra-thin battery core using lamination process.
Wherein, the electrode slice between two not curled single-side electrode pieces is conventional dual coating active material
Electrode slice.
Further, the not curled single-side electrode piece is that not curled single side electrode film or not curled single side are negative
Electrode slice；
The preparation method of not curled single side negative electrode plate: according to the compacted density of negative electrode active material, to its self-supporting
Pole piece carries out roll-in, reaches scheduled thickness, and negative electrode active layer is made；It is uniformly coated on the surface of negative current collector side
One layer of conducting resinl；It is layed in negative electrode active layer is smooth on the conducting resinl surface again, single side negative electrode is made；It will be obtained
Single side negative electrode is toasted, then through roll-in, not curled single side negative electrode plate is made；
The preparation method of not curled single side electrode film: according to the compacted density of positive active material, to its self-supporting
Pole piece carries out roll-in, reaches scheduled thickness, and positive-active layer is made；It is uniformly coated on the surface of plus plate current-collecting body side
One layer of conducting resinl；It is layed in positive-active layer is smooth on the conducting resinl surface again, single side positive electrode is made；It will be obtained
Single side positive electrode is toasted, then through roll-in, not curled single side electrode film is made.
Embodiment three
The present embodiment provides a kind of preparation methods of ultrathin lithium ion battery, first using the system of ultra-thin battery core in embodiment two
The step 1) of Preparation Method~step 5) prepares ultra-thin battery core, by the ultra-thin battery core of preparation as the electricity of ultrathin lithium ion battery
Then core prepares ultrathin lithium ion battery using common process.It is wherein first prepared using the preparation method of embodiment two ultra-thin
Battery core, the process flow chart for then preparing ultrathin lithium ion battery using common process are as shown in Figure 1.
Example IV
The present embodiment provides a kind of ultrathin lithium ion batteries, described including aluminum plastic film and the battery core being set in aluminum plastic film
Battery core is the ultra-thin battery core of the ultra-thin battery core in above-described embodiment one or the preparation method preparation using above-described embodiment two.This reality
The ultrathin lithium ion battery for applying example offer, does not need additionally to increase cell thickness, does not waste material, mistake of the single-side electrode in roll-in
Be not in crimp in journey, facilitate following process.
Embodiment five
The ultrathin lithium ion battery for making a pair of of piece is that single side electrode film and single side negative electrode plate match.Single side positive electricity
The positive electrode active materials that pole piece uses is cobalt acid lithiums, compacted density 3.5mg/cm3；The negative electrode active that single side negative electrode plate uses
Object is graphite, compacted density 1.5mg/cm3；Conducting resinl is the mixture of graphene and PVDF, and coating thickness is 0.5 micron.
Ultrathin lithium ion battery production process is as follows: firstly, according to the compacted density of cobalt acid lithium, by cobalt acid lithium roll-in in advance
Fixed thickness forms positive-active layer 3 and then uniformly coats conducting resinl 2 using silk stick using aluminium foil as plus plate current-collecting body 1
It is covered on 2 surface of conducting resinl, is put into 150 DEG C of oven in aluminium foil surface, then by the positive-active layer 3 after roll-in is smooth
It toasts 60min and obtains not curled single side electrode film by the single side positive electrode after baking by the roll-in of roll squeezer；It does not roll up
Bent single side negative electrode plate production process prepares negative electrode active layer as negative electrode active material using graphite as above-mentioned process
5, using copper foil as negative current collector 6, negative copper foil coats conducting resinl 2, and negative electrode active layer 5 is covered on 2 surface of conducting resinl, this
In be not repeated；Finally using conventional lamination process, according to above-mentioned not curled single side negative electrode plate, diaphragm 4, not curled list
Structure lamination as the electrode film of face completes the ultrathin lithium ion battery production of a pair of of piece.The ultra-thin lithium of a pair of of piece of preparation
The structure of ion battery is as shown in Figure 2.
Embodiment six
The ultrathin lithium ion battery of two pairs of pieces is made, is that two panels single side negative electrode plate and a piece of two-sided electrode film match.
The active matter of single side electrode film is ternary material, compacted density 3.8mg/cm3；The active matter of single side negative electrode plate is stone
Ink, compacted density 1.6mg/cm3；Conducting resinl is the mixture of graphene and CMC, and coating thickness is 2 microns.
Ultrathin lithium ion battery production process is as follows: firstly, being pressed onto graphite roller scheduled according to the compacted density of graphite
Thickness formed negative electrode active layer 5, using copper foil as negative current collector 6, then use coating device uniformly coat conducting resinl 2 in
Copper foil surface, then be covered in the negative electrode active layer 5 after roll-in is smooth on 2 surface of conducting resinl, it is put into 120 DEG C of oven and dries
Single side negative electrode after baking, is passed through the minimum pressure roll-in of roll squeezer, obtains not curled single side negative electrode by roasting 40min
Piece；Two-sided electrode film is the electrode film of the dual coating positive electrode active materials of common process, i.e. the two of plus plate current-collecting body 1
Face is all covered with positive-active layer 3；Finally using conventional lamination process, according to above-mentioned not curled single side negative electrode plate, diaphragm
4, two-sided electrode film, diaphragm, structure lamination as not curled single side negative electrode plate, complete the ultra-thin lithium ion of two pairs of pieces
Battery production.The structure of the ultrathin lithium ion battery of two pairs of pieces of preparation is as shown in Figure 3.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (7)
1. a kind of ultra-thin battery core, including several electrode films and several negative electrode plates, and negative electrode plate described in through-thickness and
The electrode film is stacked alternately, and is provided with diaphragm between the adjacent negative electrode plate and the electrode film, feature exists
In: electrode slice on the outermost side is not curled single-side electrode piece, and the not curled single-side electrode piece includes collector, leads
Electric glue and active layer, the active layer is by the conductive adhesive on the medial surface of the collector.
2. a kind of ultra-thin battery core as described in claim 1, it is characterised in that: wherein the outermost electrode slice of side is not roll up
Bent single side negative electrode plate；The not curled single side negative electrode plate includes negative current collector, conducting resinl and negative electrode active layer, institute
It states negative electrode active layer and passes through the conductive adhesive on the medial surface of the negative current collector.
3. a kind of ultra-thin battery core as claimed in claim 2, it is characterised in that: the outermost electrode slice of other side is not roll up
Bent single side electrode film；The not curled single side electrode film includes plus plate current-collecting body, conducting resinl and positive-active layer, institute
It states positive-active layer and passes through the conductive adhesive on the medial surface of the plus plate current-collecting body.
4. a kind of ultra-thin battery core as claimed in claim 2, it is characterised in that: the outermost electrode slice of other side is not roll up
Bent single side negative electrode plate.
5. a kind of ultra-thin battery core as described in claim 1, it is characterised in that: the conducting resinl with a thickness of 0.1~5 μm.
6. a kind of ultra-thin battery core as described in claim 1, it is characterised in that: two on the outermost side not curled single side electricity
Electrode slice between pole piece is the electrode slice of conventional dual coating active material.
7. a kind of ultrathin lithium ion battery, including aluminum plastic film and the battery core being set in aluminum plastic film, it is characterised in that: the battery core
For ultra-thin battery core as claimed in any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821112111.1U CN208478466U (en) | 2018-07-13 | 2018-07-13 | A kind of ultra-thin battery core and ultrathin lithium ion battery |
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| CN201821112111.1U CN208478466U (en) | 2018-07-13 | 2018-07-13 | A kind of ultra-thin battery core and ultrathin lithium ion battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108717967A (en) * | 2018-07-13 | 2018-10-30 | 柔电（武汉）科技有限公司 | A kind of ultra-thin battery core and preparation method, ultrathin lithium ion battery and preparation method |
| CN112349953A (en) * | 2020-10-27 | 2021-02-09 | 珠海冠宇动力电池有限公司 | Lithium ion battery |
| CN112687834A (en) * | 2020-12-25 | 2021-04-20 | 珠海冠宇动力电池有限公司 | Battery cell, manufacturing method of battery cell and battery |
-
2018
- 2018-07-13 CN CN201821112111.1U patent/CN208478466U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108717967A (en) * | 2018-07-13 | 2018-10-30 | 柔电（武汉）科技有限公司 | A kind of ultra-thin battery core and preparation method, ultrathin lithium ion battery and preparation method |
| CN112349953A (en) * | 2020-10-27 | 2021-02-09 | 珠海冠宇动力电池有限公司 | Lithium ion battery |
| CN112687834A (en) * | 2020-12-25 | 2021-04-20 | 珠海冠宇动力电池有限公司 | Battery cell, manufacturing method of battery cell and battery |
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