CN108306052A - A kind of battery core and its manufacturing method, battery and electronic device - Google Patents
A kind of battery core and its manufacturing method, battery and electronic device Download PDFInfo
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- CN108306052A CN108306052A CN201810185151.7A CN201810185151A CN108306052A CN 108306052 A CN108306052 A CN 108306052A CN 201810185151 A CN201810185151 A CN 201810185151A CN 108306052 A CN108306052 A CN 108306052A
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- positive
- active material
- material layer
- plate
- battery core
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 70
- 239000007774 positive electrode material Substances 0.000 claims abstract description 160
- 239000011149 active material Substances 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 17
- 239000003792 electrolyte Substances 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims 1
- 229910052744 lithium Inorganic materials 0.000 abstract description 29
- 238000001465 metallisation Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 29
- 238000010586 diagram Methods 0.000 description 21
- 239000000463 material Substances 0.000 description 17
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 11
- 238000006479 redox reaction Methods 0.000 description 9
- 239000003292 glue Substances 0.000 description 8
- 238000000151 deposition Methods 0.000 description 7
- 230000008021 deposition Effects 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000005030 aluminium foil Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000009849 deactivation Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 238000007740 vapor deposition Methods 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000006183 anode active material Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical class [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 229910002102 lithium manganese oxide Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- ILXAVRFGLBYNEJ-UHFFFAOYSA-K lithium;manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[O-]P([O-])([O-])=O ILXAVRFGLBYNEJ-UHFFFAOYSA-K 0.000 description 1
- VGYDTVNNDKLMHX-UHFFFAOYSA-N lithium;manganese;nickel;oxocobalt Chemical compound [Li].[Mn].[Ni].[Co]=O VGYDTVNNDKLMHX-UHFFFAOYSA-N 0.000 description 1
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
This application discloses a kind of battery core and its manufacturing method, battery and electronic devices.Wherein battery core manufacturing method includes：Positive plate base is provided；The first positive electrode active material layer is formed in positive plate substrate surface setting positive active material；The second positive electrode active material layer is set in the fringe region of the first positive electrode active material layer, wherein the conductivity of the second positive electrode active material layer is not more than 10^ (10) S/m.By the way that the second active material layer that conductivity is not more than 10^ (10) S/m is arranged in the positive plate fringe region of battery battery core, there is the phenomenon that lithium metal deposition in the negative plate that can mitigate battery core, and then improves battery core service life.
Description
Technical field
This application involves battery manufacturing fields, are filled more particularly to a kind of battery core and its manufacturing method, battery and electronics
It sets.
Background technology
Continuous with mobile electronic products such as mobile phones is popularized, and mobile electronic product usually can all be set using internal battery
Meter.Wherein battery generally all has battery core, has generally comprised positive plate, negative plate and diaphragm in battery core, wherein positive plate,
When negative plate and diaphragm assemble, positive plate, negative plate edge it is possible that the problem of edge is aligned, at this time positive plate,
Negative plate edge can occur redox reaction and the edge of negative plate is caused lithium deposition problems occur.
Invention content
A kind of battery core and its manufacturing method of the application offer, battery and electronic device, to solve battery core in the prior art
Positive plate, the alignment of negative plate edge when at the edge of negative plate there is the problem of lithium deposition.
In order to solve the above technical problems, the technical solution that the application uses is：A kind of manufacturing method of battery core is provided,
Wherein battery core manufacturing method includes：Positive plate base is provided；First is formed in positive plate substrate surface setting positive active material
Positive electrode active material layer, positive active material is for absorbing or discharging charge to realize the charge and discharge of battery core；In the first anode
The second positive electrode active material layer is arranged in the fringe region of active material layer, wherein the conductivity of the second positive electrode active material layer is little
In 10^ (- 10) S/m.
In order to solve the above technical problems, another technical solution that the application uses is：A kind of battery core is provided, battery core is used for
In battery, wherein battery core includes positive plate, positive plate include positive plate base and be set to positive plate substrate surface by just
The first positive electrode active material layer that pole active material is formed, the first positive active material is for absorbing or discharging charge to realize
The charge and discharge of battery core；Wherein, the fringe region of the first positive electrode active material layer is provided with the second positive electrode active material layer, wherein the
The conductivity of two positive electrode active material layers is not more than 10^ (- 10) S/m.
In order to solve the above technical problems, another technical solution that the application uses is：A kind of battery, wherein battery are provided
Including any one of them battery core above.
In order to solve the above technical problems, another technical solution that the application uses is：A kind of electronic device is provided, wherein
Electronic device includes battery, and battery includes any one of them battery core above.
The advantageous effect of the application is：The case where being different from the prior art, a kind of battery core of the application offer and its manufacturer
Method, battery and electronic device.By the way that the of conductivity no more than 10^ (- 10) S/m is arranged in the positive plate marginal portion of battery core
There is the phenomenon that lithium metal deposition in two positive electrode active material layers, the negative plate that can mitigate battery core, and then improve battery core use
Service life.
Description of the drawings
Fig. 1 is a kind of flow diagram of one embodiment of battery core manufacturing method of the application；
Fig. 2 is a kind of flow diagram of another embodiment of battery core manufacturing method of the application；
Fig. 3 is a kind of flow diagram of the another embodiment of battery core manufacturing method of the application；
Fig. 4 is a kind of flow diagram of the another embodiment of battery core manufacturing method of the application；
Fig. 5 is a kind of structural schematic diagram of one embodiment of battery core provided by the present application；
Fig. 6 is sectional view of the battery core shown in Fig. 5 in the section that A-A ' is；
Fig. 7 is the structural schematic diagram of a battery unit in Fig. 6；
Fig. 8 is the structural schematic diagram of one embodiment of positive plate in the battery unit that Fig. 7 is provided；
Fig. 9 is the structural schematic diagram of another embodiment of positive plate in the battery unit that Fig. 7 is provided；
Figure 10 is the structural schematic diagram of the another embodiment of positive plate in the battery unit that Fig. 7 is provided；
Figure 11 is a kind of structural schematic diagram of one embodiment of battery provided by the present application；
Figure 12 is a kind of structural schematic diagram of one embodiment of electronic device provided by the present application.
Specific implementation mode
The technical issues of to make the application solve, the technical solution of use and the technique effect that reaches are clearer, below
The technical solution of the embodiment of the present application will be described in further detail in conjunction with attached drawing.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
It is contained at least one embodiment of the application.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
Refering to fig. 1, Fig. 1 is a kind of flow diagram of one embodiment of battery core manufacturing method of the application.Wherein, battery core manufactures
Method is as follows：
Step S101：Positive plate base is provided.
In this step, positive plate base is generally aluminium foil.Wherein provide positive plate base the specific steps are：By aluminium block
Aluminium foil is made, and aluminium foil is cut into preset size to form positive plate base.Wherein to make aluminium block become aluminium foil mainly according to
By roll-force roll forming, that is, adjusting roll gap makes roll gap keep certain value so that aluminium block is rolled into the aluminium foil of consistency of thickness.
Step S102：The first positive electrode active material layer is formed in positive plate substrate surface setting positive active material.
After completing step S101, continue step S102.That is, by positive active material even spread to positive chip base
Plate surface, to form positive electrode active material layer；The positive plate substrate cut of positive active material will be coated with into manufacture positive plate
Required size；Predeterminated position on the positive plate base for completing cutting welds positive pole ear, then passes through subsequent processing
Complete the manufacture of positive plate.Positive active material may include metallic compound containing lithium or can embedding lithium metallic compound, such as
Lithium and cobalt oxides, lithium manganese oxide, Li, Ni, Mn oxide, lithium-nickel-manganese-cobalt oxide, lithium iron phosphate, lithium manganese phosphate, carbon black
And Kynoar (PVDF).
Step S103：In the fringe region of the first positive electrode active material layer, the second positive electrode active material layer is set, wherein the
The conductivity of two positive electrode active material layers is not more than 10^ (- 10) S/m.
After completing step S102, continue step S103.That is, the fringe region in the first positive electrode active material layer is set
The second positive electrode active material layer is set, wherein the conductivity of the second positive electrode active material layer is not more than 10^ (- 10) S/m.First anode
The conductivity of active material layer can be more than the conductivity of the second positive electrode active material layer, so as to improve the centre of positive plate
The electric conductivity in region makes the efficiency for charge-discharge of positive plate improve.It is may be used in this step in the first positive electrode active material layer
Strike-through processing is carried out on fringe region so that glue penetrates into the positive active material of the fringe region of the first positive electrode active material layer
To form the second positive electrode active material layer.It can make the conductivity of the second positive electrode active material layer by choosing the small glue of electric conductivity
No more than 10^ (- 10) S/m, so as to weaken the electric conductivity of positive plate marginal portion, and then can weaken positive plate edge with
, there is the problem of lithium metal deposition to mitigate negative plate in the redox reaction that the edge of negative plate carries out.
Further, insulating cement may be used when carrying out the processing of edge strike-through so that insulating cement infiltrates through first
In positive electrode active material layer, positive active material is wrapped up to form nonconducting second active material layer.In other realities
It applies in example, the surface for the fringe region that insulating cement is covered in the first positive electrode active material layer can also be used non-conductive to be formed
The second active material layer.It is understood that forming nonconducting second active material layer at positive plate edge can prevent
There is redox reaction in the edge of positive plate edge and negative plate, is asked so as to avoid negative plate from lithium metal deposition occur
Topic.Wherein, insulating cement can be paraffin, PE glue or PP glue etc., and insulating cement needs certain wetability simultaneously, so as to insulating cement
What is be more prone to pastes the fringe region of the first positive electrode active material layer.
It in this step, can also be by the way of vapor deposition, coating, plating or sputter by the second positive electrode active material layer
Fringe region to positive plate base is set.Its method includes mainly being blocked in the first positive electrode active material layer using barrier
Between region, it is then by moulding process such as vapor deposition, coating, plating or sputters that electric conductivity is small without blocking fringe region
The fringe region not being blocked in material setting to positive plate base, to form conductivity no more than 10^ (- 10) S/m's
Second positive electrode active material layer.Wherein, the material for being used to form the second positive electrode active material layer includes organic material, such as stone
At least one of wax, PE glue, PP glue；Or it includes metallic compound to form the material of the second positive electrode active material layer, such as
At least one of aluminium oxide, magnesia or barium sulfate.
Since battery core further includes negative plate and diaphragm, in the battery core manufacturing method described in the present embodiment, electricity
The manufacturing method of core further includes manufacture negative plate and diaphragm.The manufacturing method of wherein negative plate includes：Cathode chip base is provided
Plate is coated with negative electrode active material to form negative electrode active material layer in negative plate substrate surface, then cuts into negative plate pre-
Fixed size.Wherein negative electrode substrate can be copper foil, and negative electrode active material may include graphite, sodium carboxymethylcellulose (CMC)
And butadiene-styrene rubber (Styrene-butadiene rubber, SBR) lithium metal, lithium metal powder can be stored up, lithium metal oxygen can be stored up
Compound or all kinds of carbon materials etc..Diaphragm is mainly cut into scheduled size by the manufacturing method of diaphragm.
In the present embodiment in the battery core battery core manufacturing method, it need to be also respectively set just on positive plate and negative plate
Pole lug and negative lug.Positive pole ear is set on positive plate, negative lug is set on negative plate.Wherein in positive plate
The method of upper setting positive pole ear can be identical with the method that negative lug is arranged on negative plate, to be arranged just on positive plate
For the method for pole lug.The method of setting positive pole ear includes on positive plate：It, will be positive when to positive plate substrate cut
Plate base cuts into the sheet material with projection portion, and wherein projection portion can be used as positive pole ear, i.e. positive pole ear can be with
Positive plate base is wholely set；Or manufactured positive pole ear is welded on the predeterminated position of positive plate so that positive pole
Ear is electrically connected with the first positive electrode active material layer realization on positive plate.
The manufacturing method of the above battery core is the manufacturing method of positive plate, negative plate and diaphragm.It completes positive plate, bearing
After the manufacture of pole piece and diaphragm, it is also necessary to diaphragm is arranged between positive plate and negative plate, set by stacking gradually
Positive plate, diaphragm and negative plate are set, positive plate, diaphragm and the negative plate being provided with then will be stacked and is wound into
Type forms the core of battery core；Or by positive plate, diaphragm and negative plate according to positive plate, diaphragm, negative plate, diaphragm
Piece, positive plate ... .. sequence stack to form the required structure of battery core.
By diaphragm setting to also need after between positive plate and negative plate to positive plate, negative plate and diaphragm into
Row encapsulation, that is, diaphragm is arranged to after between positive plate and negative plate, to obtained positive plate, diaphragm and negative
The assembly of pole piece is packaged.Its specific method encapsulated is one shell of setting, and then in the inside of shell, setting is accommodating
Space is to by the setting to accommodating space of positive plate, diaphragm and negative plate, then carry out the accommodating space of shell close
Envelope, to which positive plate, diaphragm and negative plate to be sealed in the interior space of shell.
Wherein, before being sealed to accommodating space, it is also necessary to inject electrolyte into accommodating space so that electrolyte
Submerge positive plate, diaphragm and negative plate.Positive plate and negative plate are carried out charge by electrolyte and are transmitted, so as to realize
Entire battery core being capable of charge and discharge.
In the present embodiment, positive plate, negative plate and diaphragm can be cut into identical size so that anode
Piece, negative plate and diaphragm are more convenient when assembling, to improve the manufacture efficiency of battery core.Due to positive plate and/
Or the edge of negative plate be provided with the electric conductivity of the second positive electrode active material layer and the second positive electrode active material layer no more than 10^ (-
10) S/m, therefore can prevent the edge of negative plate when positive plate, negative plate and identical diaphragm chip size from may go out
The problem of existing lithium deposition.Simultaneously as the size of positive plate, negative plate and diaphragm is identical, positive plate, negative plate and
Fixture can be reduced when the assembling of diaphragm or aligns the quantity of tool, therefore can reduce assembling tool, and reduction is manufactured into
This.
Present invention also provides the manufacturing methods of another battery core.Referring to Fig. 2, Fig. 2 is a kind of electricity provided by the present application
The flow diagram of another embodiment of core, manufacturing method.Wherein battery core includes positive plate, and the manufacturing method of battery battery core is specifically such as
Lower step：
S201：Positive plate base is provided.
The method of positive plate base and the material of positive plate base are provided in this step, and above described in step S101
Unanimously, this will not be repeated here.
S202：The second positive electrode active material layer is arranged in fringe region on the surface of positive plate base, wherein the second anode
The conductivity of active material layer is not more than 10^ (- 10) S/m.
After the preparation for completing step S201 anode plate bases, continue step S202.That is, in the table of positive plate base
The fringe region in face forms the second positive electrode active material layer, same second positive electrode active material layer can also use vapor deposition, coating,
The molding modes such as plating or sputter are formed in the fringe region on the surface of positive plate base.Its forming method is, using blocking
Object shelters from the intermediate region of positive plate base, and then the material of the second positive electrode active material layer is arranged to positive plate base
On the fringe region that is not blocked, to form the second positive electrode active material layer, wherein being used to form the second positive active material
The material of layer includes at least one of organic material, such as paraffin, PE glue, PP glue；Or form the second positive active material
The material of layer includes at least one of metal oxide, such as aluminium oxide, magnesia or barium sulfate so that the second anode
The conductivity of active material layer is not more than 10^ (- 10) S/m.
S203：The region other than the second positive electrode active material layer is removed in positive plate substrate surface, and the first positive-active is set
Material layer.
After the completion of step S202, continue step S203.I.e. in the fringe region of positive plate substrate surface setting the
After two positive electrode active material layers, then set in the central area that positive plate substrate surface removes other than the second positive electrode active material layer
Set the first positive electrode active material layer so that the second positive electrode active material layer surrounds the first positive electrode active material layer.In this step
The moulding process such as vapor deposition, coating, plating or sputter equally may be used and form the first positive electrode active material layer.
Identical with previously described method, the manufacturing method of battery core equally includes manufacture negative plate and diaphragm.This
The manufacturing method of negative plate and diaphragm is identical as pole piece described previously and the manufacturing method of diaphragm in method.Same anode
The set-up mode of piece, negative plate and diaphragm, including corresponding lug is respectively set on positive plate and negative plate, anode
Piece, the setting structure of negative plate and diaphragm and positive plate negative plate diaphragm are encapsulated in the envelope in the shell of battery core
Dress mode etc. all can be identical as previously described method, and this will not be repeated here.
Therefore the present embodiment provides a kind of manufacturing methods of battery core, conductive by being arranged in the fringe region of positive plate base
Rate is not more than the second positive electrode active material layer of 10^ (- 10) S/m, then living in the first anode of the intermediate region of positive plate setting
Property material layer so that the first positive electrode active material layer is surrounded by the second positive electrode active material layer, can reduce positive plate base
The electric conductivity of marginal portion, and then weaken the redox reaction of positive plate and negative plate fringe region, it is negative so as to mitigate
There is the phenomenon that lithium metal deposition in pole piece edge；Can also further the second positive electrode active material layer be set to insulating layer from
And avoid positive plate that redox reaction occurs with negative plate fringe region, therefore can prevent negative plate edge from lithium metal occur
The phenomenon that deposition；Further, positive plate, negative plate and diaphragm can also be sized to identical size,
So that contraposition is convenient when positive plate, negative plate and diaphragm assemble, so as to reduce fixture or align the quantity of tool,
Therefore assembling tool can be reduced, manufacturing cost is reduced.
Present invention also provides the manufacturing methods of another battery core.Referring to Fig. 3, Fig. 3 is a kind of electricity provided by the present application
The flow diagram of the another embodiment of core, manufacturing method.Wherein battery core includes positive plate, the manufacturing method step specific as follows of battery core
Suddenly：
S301：Positive plate base is provided.
The method of positive plate base and the material of positive plate base are provided in this step, and above described in step S101
Unanimously, this will not be repeated here.
S302：Positive active material is set to form the first positive electrode active material layer on the surface of positive plate base.
After the preparation for completing step S301 anode plate bases, continue step S302.That is, in the table of positive plate base
Face forms the first positive electrode active material layer, wherein the material of the first positive electrode active material layer and the setting side on positive plate base
Formula can with it is previously described consistent, this will not be repeated here.
S303：The positive active material of the fringe region of first positive electrode active material layer is removed, then removal just
The region setting conductivity of pole active material is not more than the second positive electrode active material layer of 10^ (- 10) S/m.
After the preparation for completing step S302 anode plate bases, continue step S303.That is, on positive plate base
After first positive electrode active material layer is set, the positive electrode active material metallic substance of the fringe region of the first positive electrode active material layer is gone
It removes, the second positive active material of 10^ (- 10) S/m is then not more than in the region setting conductivity of removal positive active material
Layer.The mode that laser burn off may be used in this step cuts the positive active material at the first positive electrode active material layer edge
It removes；It can either select reagent that the active material of the first positive electrode active material layer fringe region is corroded or dissolved to remove.
Identical with previously described method, the manufacturing method of battery core equally includes manufacture negative plate and diaphragm.This
The manufacturing method of negative plate and diaphragm is identical as pole piece described previously and the manufacturing method of diaphragm in method.Same anode
The set-up mode of piece, negative plate and diaphragm, including corresponding lug is respectively set on positive plate and negative plate, anode
Piece, the setting structure of negative plate and diaphragm and positive plate negative plate diaphragm are encapsulated in the envelope in the shell of battery core
Dress mode etc. all can be identical as previously described method, and this will not be repeated here.
The manufacturing method of another battery core provided in this embodiment, by the first anode of the surface of positive plate base setting
Then active material layer removes the positive active material at the first positive electrode active material layer edge, then in removal positive electrode active material
The region setting conductivity of matter is not more than the second positive electrode active material layer of 10^ (- 10) S/m so that the second positive active material
First positive electrode active material layer is surrounded by layer, can reduce the electric conductivity of positive plate substrate edge part, and then weaken just
There is showing for lithium metal deposition so as to mitigate negative plate edge in the redox reaction of pole piece and negative plate fringe region
As；Further the second positive electrode active material layer can also be set to insulating layer to avoid positive plate and negative plate marginal zone
Redox reaction occurs for domain, therefore can prevent negative plate edge from the phenomenon that lithium metal deposition occur；Further, may be used also
Positive plate, negative plate and diaphragm are sized to identical size so that positive plate, negative plate and diaphragm
It is convenient to be aligned when assembling, so as to reduce fixture or align the quantity of tool, therefore can reduce assembling tool, reduce system
Cause this.
Present invention also provides the manufacturing methods of another battery core.Referring to Fig. 4, Fig. 4 is a kind of electricity provided by the present application
The flow diagram of the another embodiment of core, manufacturing method.Wherein battery core includes positive plate, the manufacturing method step specific as follows of battery core
Suddenly：
S401：Positive plate base is provided.
The method that positive plate base is provided in this step is identical as the positive method of plate base of previously described offer, tool
Body preparation method and material selection please refer to embodiment above.
S402：On the surface of positive plate base, the first positive electrode active material layer is set.
After the preparation for completing step S401 anode plate bases, continue step S402.That is, in the table of positive plate base
Face forms the first positive electrode active material layer, wherein the material of the first positive electrode active material layer and the setting side on positive plate base
Formula can with it is previously described consistent, this will not be repeated here.
S403：Deactivation processing is carried out to the fringe region of the first positive electrode active material layer and forms the second positive electrode active material
Matter layer so that the conductivity of the second positive electrode active material layer is not more than 10^ (- 10) S/m.
After completing step S402, continue step S403.That is, setting up the first anode on the surface of positive plate base
After active material layer, then deactivation processing is carried out to the edge of the first positive electrode active material layer so that after deactivation is handled
Region formed conductivity be not more than 10^ (- 10) S/m the second positive electrode active material layer.In this step, part may be used
Heat-treating methods are heat-treated the positive active material of the fringe region of the first positive electrode active material layer, for example, by using
The positive active material of the fringe region of the first positive electrode active material layer of mode pair of laser irradiation heating is heat-treated so that
The electric conductivity of the first positive electrode active material layer through Overheating Treatment reduces, so that the fringe region of the first positive electrode active material layer
Ultimately form the second positive electrode active material layer that conductivity is not more than 10^ (- 10) S/m.It can also be by the first anode in this step
The electric conductivity of the positive active material of the fringe region of active material layer completely removes and forms insulating layer.
Identical with previously described method, the manufacturing method of battery core equally includes manufacture negative plate and diaphragm.This
The manufacturing method of negative plate and diaphragm is identical as pole piece described previously and the manufacturing method of diaphragm in method.Same anode
The set-up mode of piece, negative plate and diaphragm, including corresponding lug is respectively set on positive plate and negative plate, anode
Piece, the setting structure of negative plate and diaphragm and positive plate negative plate diaphragm are encapsulated in the envelope in the shell of battery core
Dress mode etc. all can be identical as previously described method, and this will not be repeated here.
Therefore the present embodiment provides the manufacturing methods of another battery core, by being arranged first just on the surface of positive plate base
Then pole active material layer carries out deactivation processing to the positive active material at the first positive electrode active material layer edge, so that
First positive electrode active material layer edge forms the second positive electrode active material layer that conductivity is not more than 10^ (- 10) S/m, makes simultaneously
It obtains the second positive electrode active material layer to be surrounded the first positive electrode active material layer, positive plate substrate edge part can be reduced
Electric conductivity, and then weaken the redox reaction of positive plate and negative plate fringe region, go out so as to mitigate negative plate edge
The phenomenon that existing lithium metal deposition；The positive active material at the first positive electrode active material layer edge can also further be gone completely
Insulating layer is formed to avoid positive plate that oxygen occurs with negative plate fringe region except the edge of the first positive electrode active material layer is made
Change reduction reaction, therefore can prevent negative plate edge from the phenomenon that lithium metal deposition occur；It further, can also will be positive
Piece, negative plate and diaphragm are sized to identical size so that when positive plate, negative plate and diaphragm assemble pair
Position is convenient, so as to reduce fixture or align the quantity of tool, therefore can reduce assembling tool, reduce manufacturing cost.
In conclusion Fig. 1 to Fig. 4 provides the manufacturing method of four kinds of battery cores, the manufacturing method of the battery core of these four is all
By the way that the second positive electrode active material layer that conductivity is not more than 10^ (- 10) S/m is arranged in the fringe region of positive plate, to drop
The electric conductivity at low positive plate edge to weaken the redox reaction of positive plate and negative plate fringe region, therefore can mitigate
There is the problem of lithium metal deposition in negative plate edge.Its distinctive points be the fringe region setting electric conductivity of positive plate it is small the
The method of two positive electrode active material layers is different.
The present embodiment additionally provides a kind of battery core, please refers to Fig. 5 to Fig. 7, and Fig. 5 is that a kind of battery core one provided by the present application is real
The structural schematic diagram of example is applied, Fig. 6 is sectional view of the battery core shown in Fig. 5 in the section of A-A ', and Fig. 7 is a battery unit in Fig. 6
Structural schematic diagram.Wherein, battery core 200 applies in battery, and battery core 200 includes positive plate 210, negative plate 220 and diaphragm
Piece 230, adjacent positive plate 210, diaphragm 230 and negative plate 220 may be constructed a battery unit.Wherein diaphragm
230 are arranged between positive plate 210 and negative plate 220 for separating positive plate 210 and negative plate 220.Positive plate 210 includes just
Pole piece substrate 216 and positive electrode active material layer in positive plate substrate surface is set, wherein positive electrode active material layer includes the
One positive electrode active material layer 212 and the second positive electrode active material layer 211, wherein the setting of the second positive electrode active material layer 211 exists
The fringe region of first positive electrode active material layer 212 simultaneously surrounds the first positive electrode active material layer 212, the second positive active material
The conductivity of layer 211 is not more than 10^ (- 10) S/m.
Therefore in the present embodiment, it is not more than 10^ (- 10) S/m by the way that conductivity is arranged in the marginal portion of positive plate 210
The second positive electrode active material layer 211 so that when battery core works normally, the oxidation between 220 edge of positive plate 210 and negative plate
Reduction reaction is weakened, and the deposition problems of the lithium metal at 220 edge of negative plate can be mitigated, therefore can improve the property of battery core
Can, increase the service life of battery core.Can also further the second positive electrode active material layer 211 be set to insulating layer, from can
Redox occurs to avoid between 220 edge of positive plate 210 and negative plate, therefore can prevent 220 edge of negative plate from occurring
Lithium metal deposition problems, therefore the performance of battery core can be further improved, increase the service life of battery core.
In the present embodiment, the manufacturing method of positive plate 210, negative plate 220 and diaphragm please refers to previously described
Battery core manufacturing method, this will not be repeated here.Wherein, 216 surface of positive plate base be provided with the first positive electrode active material layer 212 with
And second positive electrode active material layer 211.The first positive electrode active material layer can be all arranged in the surface of the both sides of positive plate base 216
212 and second positive electrode active material layer 211, wherein the first positive electrode active material layer 212 of 216 both sides of positive plate base can be with
It is symmetrical arranged, the second positive electrode active material layer 211 of 216 both sides of positive plate base can also be symmetrical arranged.Wherein, the second anode
Active material layer 211 includes following scheme in the set-up mode of positive plate 210.
Fig. 7 and Fig. 8 are please referred to, Fig. 8 is the structural schematic diagram of one embodiment of positive plate in the battery unit that Fig. 7 is provided.Its
In, the surface of the positive plate base 216 of positive plate 210 is provided with the first positive electrode active material layer 212 and the second positive-active
Material layer 211, wherein the second positive electrode active material layer 211 is set to the fringe region of positive plate base 216, and the second anode
The annular region that active material layer 211 forms a sealing surrounds the first positive electrode active material layer 212.Such method is relatively applicable in
In the battery core of stacked arrangement.This scheme is suitable for the situation identical as 220 size of negative plate of positive plate 210, when positive plate 210
When identical as 220 size of negative plate, it is possible that positive plate after positive plate 210 and negative plate 220 are assembled with diaphragm 230
The phenomenon that 210 edges all with negative plate 220 are aligned, it is thus possible to 220 fringe region of negative plate occur and generate
Lithium deposit the problem of, therefore can by the second positive electrode active material layer 211 formed one sealing annular region by first just
Pole active material layer 212 surrounds, so as to improve the problem of negative plate edge lithium deposits.
Fig. 7 and Fig. 9 are please referred to, Fig. 9 is the structural schematic diagram of another embodiment of positive plate in the battery unit that Fig. 7 is provided.
Wherein positive plate 210 equally includes positive plate base 216, and the surface of positive plate base 216 is again provided with the first positive-active
Material layer 212 and the second positive electrode active material layer 211.Difference lies in the second positive electrode active materials with the positive plate described in Fig. 5
The subregion at the edge of positive plate base 216 is arranged in matter layer 212, and the second positive electrode active material layer 212 is positive by first
211 part of active material layer surrounds, i.e. the second positive electrode active material layer 212 is not the loop configuration to be closed, such as in this reality
It applies in example, the corresponding fringe region in 3 sides in positive plate 210 can be arranged in the second positive electrode active material layer 212.This scheme is suitable
The situation different from 220 size of negative plate for positive plate 210 is provided with the second positive active material wherein on positive plate 210
3 of layer 212 are aligned while with negative plate 220 corresponding 3, and 212 side of the second positive electrode active material layer is not arranged on positive plate 210
Side corresponding with negative plate 220 is staggered, therefore can also improve the lithium deposition problems at 220 edge of negative plate.
Fig. 7 and Figure 10 are please referred to, Figure 10 is the structural representation of the another embodiment of positive plate in the battery unit that Fig. 7 is provided
Figure.Wherein positive plate 210 equally includes positive plate base 216, and the surface of positive plate base 216 is again provided with the first anode and lives
Property material layer 212 and the second positive electrode active material layer 211.Difference lies in the second positive-actives with the positive plate described in Fig. 5
The fringe region on the both sides of positive plate base 216 is arranged in material layer 212.Identical with the scheme described in Fig. 9, this scheme is same
The situation different from 220 size of negative plate suitable for positive plate 210 is provided with the second positive electrode active material wherein on positive plate 210
2 of matter layer 212 are aligned while with negative plate 220 corresponding 2, and the second positive electrode active material layer 212 is not arranged on positive plate 210
It is staggered while corresponding with negative plate 220, therefore can also equally improve the lithium deposition problems at 220 edge of negative plate.
In the present embodiment, in order to improve 200 manufacture efficiency of battery core, can also by positive plate 210, negative plate 220 and every
Diaphragm 230 is set as identical size.The edge of three when positive plate 210, negative plate 220 and diaphragm 230 are assembled
It can be aligned.
In the present embodiment, it is additionally provided with positive pole ear 214 on positive plate 210, is equally also equipped on negative plate 220 negative
Pole lug 224, wherein positive pole ear 214 are electrically connected with positive plate base 216, and negative lug 224 is electrically connected with cathode plate base.
Positive pole ear 214 and negative lug 224 correspond to the positive and negative anodes of battery core 200 respectively, that is, battery core 200 is by positive pole ear 214 and bears
Pole lug 224 completes charge and discharge process.
In the present embodiment, battery core 200 further includes shell 240, shell 240 be provided with accommodating space 241 for be arranged just
Pole piece 210, negative plate 220 and diaphragm 230.When positive plate 210, negative plate 220 and diaphragm 230 setting to accommodating sky
Between in 241 after, it is also necessary to inject electrolyte into accommodating space 241 so that positive plate 210, negative plate 220 and diaphragm
230 impregnate in the electrolytic solution, and the effect of electrolyte is so that positive plate 210 and negative plate 220 are carried out charge by electrolyte and passed
It is defeated, so as to realize that entire battery core 200 being capable of charge and discharge.Wherein electrolyte is generally by the organic solvent of high-purity, electrolyte
The raw materials such as lithium salts (lithium hexafluoro phosphate), necessary additive are formulated by a certain percentage under certain condition.
Positive plate 210, negative plate 220 and diaphragm 230 are set to when being submerged by electrolyte in accommodating space 241,
Need to ensure that used material will not react with electrolyte when the second active material layer 211 of manufacture on positive plate 210,
Or it is dissolved into electrolyte.
In the present embodiment, positive plate 210, negative plate 220 and diaphragm 230 can be according to positive plate 210, diaphragms
230, the sequence of negative plate 220 stacks gradually setting, then will stack the positive plate 210 being provided with, diaphragm 230 and bear
220 coiling and molding of pole piece forms the core of battery core 200, and then core is arranged into accommodating space 241；Or positive plate
210, diaphragm 230 and negative plate 220 can also according to positive plate 210, diaphragm 230, negative plate 220, diaphragm 230,
The sequence of positive plate 210. ... .. stacks to form the required electrode slice component of battery core, and then electrode slice component is arranged to appearance again
In 241 between emptying.
Present invention also provides a kind of batteries, and it is one embodiment of a kind of battery provided by the present application to please refer to Fig.1 1, Figure 11
Structural schematic diagram.Wherein battery 500 is internally provided with battery core 510, battery core 510 include such as any one of them battery core above,
This will not be repeated here.
Present invention also provides a kind of electronic devices, and it is a kind of electronic device provided by the present application to please refer to Fig.1 2, Figure 12
The structural schematic diagram of one embodiment.Wherein electronic device 600 is internally provided with battery 610, and battery 610 includes any one institute above
The battery stated, this will not be repeated here.
In conclusion the present embodiment proposes a kind of battery core and its manufacturing method, battery and electronic device.By in electricity
The positive plate marginal portion setting conductivity of pond battery core is not more than the second active material layer of 10^ (- 10) S/m, can mitigate electricity
There is the phenomenon that lithium metal deposition in the negative plate of core, and then improves battery core service life.Further, can by positive plate,
Negative plate and diaphragm are set as identical size so that simply square when positive plate, negative plate and diaphragm assembling contraposition
Just, and excessive fixture or contraposition tool are not needed, therefore manufacturing process can be simplified, improved production efficiency, reduce production
Cost.
Above is only an example of the present application, it is not intended to limit the scope of the claims of the application, it is every to utilize this Shen
Please equivalent structure or equivalent flow shift made by specification and accompanying drawing content, be applied directly or indirectly in other relevant skills
Art field includes similarly in the scope of patent protection of the application.
Claims (10)
1. a kind of battery core manufacturing method, the battery core include positive plate, which is characterized in that the battery core manufacturing method includes：
Positive plate base is provided；
The first positive electrode active material layer is formed in positive plate substrate surface setting positive active material；
The second positive electrode active material layer is set in the fringe region of first positive electrode active material layer, wherein second anode
The conductivity of active material layer is not more than 10^ (- 10) S/m.
2. battery core manufacturing method according to claim 1, which is characterized in that
The second positive electrode active material layer is arranged in the fringe region in first positive electrode active material layer：
Strike-through is carried out to the fringe region of first positive electrode active material layer to handle to form second active material layer；Or
Person
Insulating cement is covered in the surface of the fringe region of first positive electrode active material layer to form second active matter
Matter layer.
3. battery core manufacturing method according to claim 1, which is characterized in that the battery core further includes negative plate and diaphragm
The manufacturing method of piece, the battery core further includes：
The negative plate and diaphragm are provided；
The positive plate, negative plate and diaphragm are cut into identical size.
4. battery core manufacturing method according to claim 3, which is characterized in that the battery core manufacturing method further includes:
Positive pole ear is set on the positive plate, negative lug is set on the negative plate；
The diaphragm is arranged between the positive plate and the negative plate；
The diaphragm, the positive plate and the negative plate are packaged.
5. battery core manufacturing method according to claim 4, which is characterized in that
Described the step of being packaged to the diaphragm, the positive plate and the negative plate, specifically includes：
The shell of the battery core is provided；
The diaphragm, the positive plate and the negative plate are sealed in the accommodating space of the shell.
6. a kind of battery core, the battery core is used in battery, which is characterized in that
The battery core includes positive plate, and the positive plate includes positive plate base and is set to the positive plate substrate surface
First positive electrode active material layer；
Wherein, the fringe region of first positive electrode active material layer is provided with the second positive electrode active material layer, and described second just
The conductivity of pole active material layer is not more than 10^ (- 10) S/m.
7. battery core according to claim 6, which is characterized in that
Second positive electrode active material layer carries out strike-through processing by the fringe region to first positive electrode active material layer
It is formed；Or
Insulating cement by being covered in the fringe region of first positive electrode active material layer by second positive electrode active material layer
Surface formed.
8. battery core according to claim 6, which is characterized in that
The battery core further includes negative plate and diaphragm, wherein the size of the positive plate, negative plate and diaphragm is identical；
The positive plate further includes positive pole ear, and the negative plate further includes negative lug, and the battery core passes through the positive pole
Ear and the negative lug are electrically connected with external circuit realizes charge and discharge；
The diaphragm is set between the positive plate and the negative plate, for by the positive plate and the negative plate every
It opens；
The battery core further includes shell, the shell be provided with accommodating space for house the positive plate, negative plate and every
Diaphragm, is additionally operable to setting electrolyte inside the accommodating space, the electrolyte submerge the positive plate and the negative plate with
Realize the charge transmission between the positive plate and the negative plate.
9. a kind of battery, it is provided with battery core in the battery, which is characterized in that the battery core includes any one of claim 6-8
The battery core.
10. a kind of electronic device, the electronic device includes battery, is provided with battery core in the battery, which is characterized in that described
Battery core includes claim 6-8 any one of them battery cores.
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| CN201810185151.7A CN108306052B (en) | 2018-03-06 | 2018-03-06 | Battery cell, manufacturing method thereof, battery and electronic device |
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| CN201810185151.7A CN108306052B (en) | 2018-03-06 | 2018-03-06 | Battery cell, manufacturing method thereof, battery and electronic device |
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| US11728474B2 (en) | 2019-03-29 | 2023-08-15 | Dongguan Poweramp Technology Limited | Electrode and electrochemical device including the same |
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| CN108306052B (en) | 2024-02-09 |
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