CN109817885A - A kind of high-performance honeycomb lithium ion button shape cell - Google Patents
A kind of high-performance honeycomb lithium ion button shape cell Download PDFInfo
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- CN109817885A CN109817885A CN201910197995.8A CN201910197995A CN109817885A CN 109817885 A CN109817885 A CN 109817885A CN 201910197995 A CN201910197995 A CN 201910197995A CN 109817885 A CN109817885 A CN 109817885A
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- honeycomb
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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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Abstract
The present invention relates to a kind of high-performance honeycomb lithium ion button shape cells.The honeycomb lithium ion button shape cell is made of anode cover, positive plate, electrolyte, diaphragm, negative electrode tab, nickel foam gasket, negative electrode casing；The positive plate has cellular structures, and negative electrode tab is filled in positive plate honeycomb hole, is formed and is in close contact by diaphragm between positive and negative electrode；The positive plate active material is nickelic ternary material, and the negative electrode active material is nano-silicone wire/carbon composite material.Honeycomb lithium ion button shape cell is assembled according to anode cover → positive plate → electrolyte → diaphragm → electrolyte → negative electrode tab → nickel foam → negative electrode casing sequence.Lithium ion button shape cell provided by the present invention has honeycomb porous structure, significantly improves electrolyte wetability, improves the high rate performance of battery；Porous structure can mitigate silicon-carbon cathode charge and discharge volume expansion stress, hence it is evident that improve cycle performance of battery；Furthermore the honeycomb hole cooperation of positive and negative plate can be achieved self-positioning, effectively avoid battery short circuit caused by the dislocation of positive and negative plate and diaphragm in battery assembling process, button cell assembling process is simple, consistency is good, high production efficiency.
Description
Technical field
The invention belongs to technical field of lithium ion, and in particular to a kind of high-performance honeycomb lithium ion button shape cell.
Background technique
Lithium ion battery can be divided into the types such as rectangular cell, cylindrical battery, button cell according to the difference of shape.Button electricity
Pond has the characteristics that frivolous, small be widely used in the small portable apparatus such as electronic watch, electronic balance, electronic toy.
In recent years, with the development of information technology and mobile communication equipment multifunction, terminal device to battery capacity, service life and
More stringent requirements are proposed for charge-discharge performance etc..The button cell being widely used at present has AgO battery, Zn-Mn battery, Li-
MnO2Battery etc., battery capacity is low, energy density is small, restricted lifetime and not can be recycled.Lithium ion button shape cell has
The advantages that energy density is big, discharge voltage is high, charge/discharge speed is fast, small in size, recyclable charge and discharge, market potential is huge.This
Outer lithium ion button shape cell is also widely applied in terms of battery performance test and evaluation.
The assembling of lithium ion button shape cell usually carries out in the glove box of inert gas shielding, in order to anti-in assembling process
Only short circuit caused by positive/negative plate contact, need to guarantee positive and negative plate and diaphragm close alignment, therefore labor intensity is big, and
Time and effort consuming.Additionally due to manually alignment difficulty is big, production efficiency is low, and battery consistency is poor, and bad rate is higher.
Research and development with people to battery new material, new process and new technology are positive with nickel cobalt manganese, nickel cobalt aluminium ternary material
Pole active material, tin, silicon and its oxide are that the high-performance lithium battery of negative electrode active material obtains extensive concern.However high-performance
Active material is less in the research and application of lithium ion button shape cell, and furthermore there are huge in charge and discharge process for tin, silicon-based anode
Big volume change and fast capacity decaying.In order to improve lithium ion button shape cell capacity, improve button cell assembling technique, originally
Invention provides a kind of high-performance honeycomb lithium ion button shape cell.
Summary of the invention
The object of the present invention is to provide a kind of high performance lithium ion button shape cells, improve the appearance of lithium ion button shape cell
Amount, improves the service life of button cell；Operation difficulty and intensity are reduced in the assembling manufacture process of button cell simultaneously, is mentioned
High efficiency and homogeneity of product.
The technical scheme is that the button cell is by anode cover, positive plate, electrolyte, diaphragm, negative electrode tab, bubble
Foam nickel gasket, negative electrode casing composition, it is characterised in that: the positive plate has cellular structures, and negative electrode tab is filled in anode
In piece honeycomb hole, is formed and be in close contact by diaphragm between positive and negative electrode.
The preferable technical solution of the present invention is: the positive plate active material is in NCM523, NCM622 or NCM811
One kind, the negative electrode tab active material are one of carbon-coated nano silicon, silicon nanowires or Si-C composite material.
Superior technique scheme of the present invention is: it is described just, pole piece be punched into the identical disk of size, circular diaphragm size is big
In positive and negative electrode chip size, diaphragm is filled in all honeycomb holes；Positive plate honeycomb bore dia is 100um~1500um, hole depth
Degree is 10~100um, and negative electrode tab boss diameter is 5~20um smaller than honeycomb hole, highly 80~90% for hole depth.
Superior technique scheme of the present invention is: the button cell cathode is the micron order cylinder monomer of diaphragm cladding, institute
Cathode monomer is stated equably to be embedded in positive plate honeycomb hole；Cathode monomer is born by external sheath diaphragm, the porous silicon-carbon of cylinder
The nickel foam gasket of pole and top layer composition.Porous silicon-carbon cathode in the micron order cathode cylinder monomer includes single-layer or multi-layer
Structure.
Superior technique scheme of the present invention is: the positive plate honeycomb hole is that rectangular array or annular array are distributed.It is described
Anode cover, negative electrode casing are one of stainless steel, plating nickel and stainless steel, copper or aluminium alloy, and positive and negative electrode shell is close using insulator seal ring
Envelope.The gasket is one of nickel foam, stainless steel, copper, aluminium and its alloy.
The preparation and assembling of honeycomb lithium ion button shape cell of the present invention the following steps are included:
(1) prepared by positive plate:
Positive plate is active material with one of NCM523, NCM622, NCM811, by active material, conductive agent, bonding
Agent and solvent high-speed stirred are configured to slurry, and anode sizing agent is coated in aluminum foil current collector, carry out honeycomb after pole piece baking is dry
Pore-creating and slice obtain button cell positive plate.
Particularly, the conductive agent is one or more of conductive black, carbon nanotube, graphene；
Particularly, the binder is PVDF, and solvent is NMP organic solvent；
Particularly, the honeycomb pore-creating mode includes one of mechanical hole, laser pore-creating, solvent cleaning pore-creating；
Further, the positive plate honeycomb hole is with rectangular array or annular array, honeycomb bore dia be 100um~
1500um, hole depth are 10~100um；
(2) prepared by negative electrode tab:
Negative electrode tab with one of carbon-coated nano silicon, silicon nanowires, Si-C composite material for active material, CMC/SBR
For binder, graphene is conductive agent, and deionized water is solvent, is configured to slurry and is coated in copper foil current collector, pole piece baking
Boss is carried out after drying to construct and be sliced, and obtains button cell negative electrode tab.
Particularly, button cell negative electrode tab and positive plate is equal in magnitude；
Particularly, the boss construction method includes the methods of mask laser etching, mask solvent flushing, adhesive tape removing；
Particularly, the negative electrode slurry is coated in ceramic honeycomb mold, is demoulded after dry and is obtained micron order cylinder monomer,
Cathode cylinder monomer is finally embedded in honeycomb hole, and diameter be honeycomb hole 80~90%, highly for hole depth 75~
90%.
(3) septal slices:
Diaphragm is punched into the disk of suitable dimension according to button cell specification, diaphragm size is greater than pole piece size.
(4) button cell assembles:
Will positive and negative anodes shell, positive/negative plate, diaphragm, nickel foam gasket it is dry after be placed in glove box, according to anode cover →
Positive plate → electrolyte → diaphragm → electrolyte → negative electrode tab → nickel foam → negative electrode casing sequence is assembled.
Particularly, the diaphragm is uniformly filled in honeycomb hole under the infiltration of electrolyte, the cooperation of positive and negative plate through hole
It is self-positioning；
Particularly, the micron order cathode monomer surface coats membrane layer, and cathode monomer is uniformly embedded in positive honeycomb hole
In；
Further, nickel foam gasket is stacked on one or more layers accumulation of the cathode monomer, monomer upper layer.
(5) battery seal:
Assembled button cell is sealed on battery sealing machine, it is final to obtain the honeycomb lithium ion button electricity
Pond.
Honeycomb lithium ion button shape cell of the present invention has the advantage that
(1) use nickelic ternary material for anode, Si-C composite material is cathode, prepared button cell capacity height,
It has extended cycle life, it is easy to accomplish lightening and micromation；
(2) cellular structures improve electrolyte wetability, to improve lithium ion transport rate, improve button
The charge-discharge velocity of battery.
(3) cellular structures effectively mitigate the volume expansion stress in silicon-carbon cathode charge and discharge process, to improve
The cycle performance of battery.
(4) the hole cooperation of honeycomb positive/negative plate has self-locating function, avoids alignment difficulty when assembled and not
Uniformly, to prevent button cell assembly short circuit, homogeneity of product is improved.
(5) honeycomb button cell overcharge, the shrinking percentage of the diaphragms such as over-discharge it is small, there is better security performance.
Detailed description of the invention
Fig. 1 is lithium ion button shape cell structural schematic diagram of the present invention；
Fig. 2 is honeycomb lithium ion button shape cell positive and negative plate of the present invention and assembling schematic diagram；
Fig. 3 is rectangular array of the present invention and annular array honeycomb button cell structural schematic diagram；
Fig. 4 is micron silicon Carbon anode cylinder monomer structure schematic diagram of the present invention.
Each mark is respectively as follows: 001-anode cover in figure；002-positive plate；003-diaphragm；004-negative electrode tab；005—
Nickel foam gasket；006-negative electrode casing；021-aluminum foil current collector；022-positive honeycomb hole；023-positive coating flange；
041-copper foil current collector；042-cathode boss；043-cathode shrinkage pool；007-cathode cylinder monomer；071-silicon-carbon cathode
Piece；072-diaphragm；073-nickel foam.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.These embodiments be for illustrating the present invention,
Rather than limiting the invention, any form that the present invention carries out is improved under the premise of present inventive concept, belongs to this hair
Bright claimed range.
A kind of high-performance honeycomb lithium ion button shape cell according to the present invention, as shown in Figure 1 by 001 anode cover, 002
Positive plate, 003 diaphragm, 004 negative electrode tab, 005 nickel foam gasket and 006 negative electrode casing composition.The positive and negative plate has honeycomb more
Pore structure, 002 positive plate as shown in Figure 2 is by 021 aluminum foil current collector, 022 positive honeycomb hole and 023 positive coating boss group
At 004 negative electrode tab is made of 041 copper foil current collector, 042 cathode coating boss and 043 cathode shrinkage pool.002 anode
It is separated between piece and 004 negative electrode tab using 003 diaphragm.The present invention is made further specifically combined with specific embodiments below
It is bright:
Embodiment 1:
A kind of honeycomb lithium ion button shape cell of CR1220 rectangular array arrangement and its assembling:
A kind of honeycomb lithium ion button shape cell of CR1220 rectangular array arrangement, it is characterised in that the honeycomb hole of positive plate
It is arranged, is formed in the honeycomb hole of the boss insertion positive plate of negative electrode tab tight in the form of rectangular array with corresponding negative electrode tab boss
Close connection.The honeycomb lithium ion button shape cell preparation and assembling steps are as follows:
(1) prepared by positive plate:
Positive plate is using NCM523 ternary material as active material, by active material, conductive agent, binder and solvent high-speed stirring
It mixes and is configured to slurry, anode sizing agent is coated in aluminum foil current collector, is carried out honeycomb pore-creating and slice after pole piece baking is dry, is obtained
Button cell positive plate.
Particularly, the conductive agent is conductive black, and the binder is PVDF, and solvent is NMP organic solvent；
Particularly, the honeycomb pore-creating mode is mechanical hole, using bee on honeycomb mask and annular scraper removal pole piece
The corresponding coat of socket bore；
Further, the positive plate honeycomb hole is arranged with rectangular array, and honeycomb bore dia is 100um~300um, hole depth
Degree is 10~30um；
(2) prepared by negative electrode tab:
For negative electrode tab using carbon-coated nano silicon as active material, CMC/SBR is binder, and graphene is conductive agent, deionization
Water is solvent, is configured to slurry and is coated in copper foil current collector, carries out boss after pole piece baking is dry and constructs and be sliced, obtains knob
Detain battery cathode sheet.
Particularly, button cell negative electrode tab and positive plate is equal in magnitude；
Particularly, the boss construction method is mask laser etching, is applied using laser ablation removal cathode boss edge
Coating, to obtain negative electrode tab corresponding with positive plate.
(3) septal slices:
Diaphragm is punched into the disk of suitable dimension according to button cell specification, diaphragm size is greater than pole piece size.
(4) button cell assembles:
Will positive and negative anodes shell, positive/negative plate, diaphragm, nickel foam gasket it is dry after be placed in glove box, according to anode cover →
Positive plate → electrolyte → diaphragm → electrolyte → negative electrode tab → nickel foam → negative electrode casing sequence is assembled.The electrolyte
It is drawn using liquid flowing tube, guarantees that pole piece and diaphragm sufficiently soak.
(5) battery seal:
Assembled button cell is sealed on battery sealing machine.
Embodiment 2:
A kind of honeycomb lithium ion button shape cell of CR2032 annular array and its assembling:
A kind of honeycomb lithium ion button shape cell of CR2032 annular array it is characterized in that positive plate honeycomb hole
It is arranged, is formed in the honeycomb hole of the boss insertion positive plate of negative electrode tab tight in the form of annular array with corresponding negative electrode tab boss
Close connection.The honeycomb lithium ion button shape cell preparation and assembling steps are as follows:
(1) prepared by positive plate:
Positive plate is using NCM622 ternary material as active material, by active material, conductive agent, binder and solvent high-speed stirring
It mixes and is configured to slurry, anode sizing agent is coated in aluminum foil current collector, is carried out honeycomb pore-creating and slice after pole piece baking is dry, is obtained
Button cell positive plate.
Particularly, the conductive agent is conductive black, and the binder is PVDF, and solvent is NMP organic solvent；
Particularly, the honeycomb pore-creating mode is solvent washing, washes out honeycomb hole using nmp solvent using honeycomb mask
Structure obtains honeycomb positive plate；
Further, for the positive plate honeycomb hole with annular array, honeycomb bore dia is 300um~600um, hole depth
Degree is 30~50um；
(2) prepared by negative electrode tab:
For negative electrode tab using silicon nanowires as active material, CMC/SBR is binder, and graphene is conductive agent, and deionized water is
Solvent is configured to slurry and is coated in copper foil current collector, carries out boss after pole piece baking is dry and constructs and be sliced, and obtains button electricity
Pond negative electrode tab.
Particularly, button cell negative electrode tab and positive plate is equal in magnitude；
Particularly, the boss construction method is mask laser etching, is applied using laser ablation removal cathode boss edge
Coating, to obtain negative electrode tab corresponding with positive plate.
(3) septal slices:
Diaphragm is punched into the disk of suitable dimension according to button cell specification, diaphragm size is greater than pole piece size.
(4) button cell assembles:
Will positive and negative anodes shell, positive/negative plate, diaphragm, nickel foam gasket it is dry after be placed in glove box, according to anode cover →
Positive plate → electrolyte → diaphragm → electrolyte → negative electrode tab → nickel foam → negative electrode casing sequence is assembled.The electrolyte
It is drawn using liquid flowing tube, guarantees that pole piece and diaphragm sufficiently soak.
(5) battery seal:
Assembled button cell is sealed on battery sealing machine.
Embodiment 3:
A kind of honeycomb lithium ion button shape cell of CR2016 rectangular array arrangement and its assembling:
A kind of honeycomb lithium ion button shape cell of CR2016 rectangular array arrangement, it is characterised in that positive plate is that honeycomb is more
Pore structure, honeycomb hole are arranged with rectangular array, and negative electrode tab is micron order cylinder monomer, and negative electrode slurry is coated on ceramic honeycomb mold
In, it is demoulded after dry and obtains micron order cylinder monomer.Nickel foam pad is accumulated on single cathode cylinder monomer external sheath diaphragm, upper layer
Piece is embedded in honeycomb hole, the 80~90% of a diameter of honeycomb hole, highly 75~90% for hole depth.The honeycomb
Lithium ion button shape cell preparation and assembling steps are as follows:
(1) prepared by positive plate:
Positive plate is using NCM811 ternary material as active material, by active material, conductive agent, binder and solvent high-speed stirring
It mixes and is configured to slurry, anode sizing agent is coated in aluminum foil current collector, is carried out honeycomb pore-creating and slice after pole piece baking is dry, is obtained
Button cell positive plate.
Particularly, the conductive agent is conductive black, and the binder is PVDF, and solvent is NMP organic solvent；
Particularly, the honeycomb pore-creating mode is solvent washing, washes out honeycomb hole using nmp solvent using honeycomb mask
Structure obtains honeycomb positive plate；
Further, the positive plate honeycomb hole is arranged with rectangular array, and honeycomb bore dia is 400um~500um, hole depth
Degree is 40~70um；
(2) prepared by negative electrode tab:
For negative electrode tab using silicon nanowires as active material, CMC/SBR is binder, and graphene is conductive agent, and deionized water is
Solvent is configured to slurry coated in ceramic honeycomb mold, demoulds after dry and obtain micron order cylinder monomer.
Particularly, the diameter of the micron silicon Carbon anode monomer is the 80% of honeycomb hole, highly 75% for hole depth.
(3) septal slices:
Diaphragm is punched into the disk of suitable dimension according to micron silicon Carbon anode monomer specification, diaphragm is coated on cathode list
Body surface face.
(4) button cell assembles:
Will positive and negative anodes shell, positive/negative plate, diaphragm, nickel foam gasket it is dry after be placed in glove box, according to anode cover →
Positive plate → electrolyte → negative electrode tab → nickel foam → negative electrode casing sequence is assembled.The electrolyte is inhaled using liquid flowing tube
It takes, guarantees that pole piece and diaphragm sufficiently soak.
(5) battery seal:
Assembled button cell is sealed on battery sealing machine.
Embodiment 4:
A kind of honeycomb lithium ion button shape cell of CR2430 annular array and its assembling:
A kind of honeycomb lithium ion button shape cell of CR2430 annular array, it is characterised in that positive plate is that honeycomb is more
Pore structure, for honeycomb hole with annular array, negative electrode tab is micron order cylinder monomer, and negative electrode slurry is coated on ceramic honeycomb mold
In, it is demoulded after dry and obtains micron order cylinder monomer.External sheath diaphragm after multiple cathode cylinder monomer accumulations, upper layer accumulation bubble
Foam nickel gasket, is embedded in honeycomb hole, the 80~90% of a diameter of honeycomb hole, highly 75~90% for hole depth.It is described
The preparation of honeycomb lithium ion button shape cell and assembling steps are as follows:
(1) prepared by positive plate:
Positive plate is using NCA811 ternary material as active material, by active material, conductive agent, binder and solvent high-speed stirring
It mixes and is configured to slurry, anode sizing agent is coated in aluminum foil current collector, is carried out honeycomb pore-creating and slice after pole piece baking is dry, is obtained
Button cell positive plate.
Particularly, the conductive agent is conductive black, and the binder is PVDF, and solvent is NMP organic solvent；
Particularly, the honeycomb pore-creating mode is solvent washing, washes out honeycomb hole using nmp solvent using honeycomb mask
Structure obtains honeycomb positive plate；
Further, for the positive plate honeycomb hole with annular array, honeycomb bore dia is 500um~800um, hole depth
Degree is 70~100um；
(2) prepared by negative electrode tab:
For negative electrode tab using Si-C composite material as active material, CMC/SBR is binder, and graphene is conductive agent, deionization
Water is solvent, is configured to slurry coated in ceramic honeycomb mold, demoulds after dry and obtain micron order cylinder monomer.
Particularly, the diameter of the micron silicon Carbon anode monomer is the 80% of honeycomb hole, and three layers of piling height are hole depth
The 75% of degree.
(3) septal slices:
Diaphragm is punched into the disk of suitable dimension according to micron silicon Carbon anode monomer specification, diaphragm is coated on three layers and bears
Pole monomer surface.
(4) button cell assembles:
Will positive and negative anodes shell, positive/negative plate, diaphragm, nickel foam gasket it is dry after be placed in glove box, according to anode cover →
Positive plate → electrolyte → negative electrode tab → nickel foam → negative electrode casing sequence is assembled.The electrolyte is inhaled using liquid flowing tube
It takes, guarantees that pole piece and diaphragm sufficiently soak.
(5) battery seal:
Assembled button cell is sealed on battery sealing machine.
Claims (9)
1. a kind of high-performance honeycomb lithium ion button shape cell, it is by anode cover, positive plate, electrolyte, diaphragm, negative electrode tab, bubble
Foam nickel gasket, negative electrode casing composition, it is characterised in that: the positive plate has cellular structures, and negative electrode tab is filled in anode
In piece honeycomb hole, is formed and be in close contact by diaphragm between positive and negative electrode.
2. a kind of high-performance honeycomb lithium ion button shape cell according to claim 1, it is characterised in that: the positive plate
Active material is one of NCM523, NCM622 or NCM811.
3. a kind of high-performance honeycomb lithium ion button shape cell according to claim 1, it is characterised in that: the negative electrode tab
Active material is one of carbon-coated nano silicon, silicon nanowires or Si-C composite material.
4. a kind of high-performance honeycomb lithium ion button shape cell according to claim 1, it is characterised in that: it is described just, pole
Piece is punched into the identical disk of size, and circular diaphragm size is greater than positive and negative electrode chip size, and diaphragm is filled in all honeycomb holes
In；Positive plate honeycomb bore dia is 100um~1500um, and hole depth is 10~100um, and negative electrode tab boss diameter is smaller than honeycomb hole
5~20um, highly 80~90% for hole depth.
5. a kind of high-performance honeycomb lithium ion button shape cell according to claim 1, it is characterised in that: the button electricity
Pond cathode is the micron order cylinder monomer of diaphragm cladding, and the cathode monomer is equably embedded in positive plate honeycomb hole；It is negative
Pole monomer is made of the nickel foam gasket of external sheath diaphragm, the porous silicon-carbon cathode of cylinder and top layer.
6. a kind of high-performance honeycomb lithium ion button shape cell according to claim 5, it is characterised in that: the micron order
Porous silicon-carbon cathode in cathode cylinder monomer includes single or multi-layer structure.
7. a kind of high-performance honeycomb lithium ion button shape cell according to claim 1, it is characterised in that: the positive plate
Honeycomb hole is that rectangular array or annular array are distributed.
8. a kind of high-performance honeycomb lithium ion button shape cell according to claim 1, it is characterised in that: the anode
Shell, negative electrode casing are one of stainless steel, plating nickel and stainless steel, copper or aluminium alloy, and positive and negative electrode shell is sealed using insulator seal ring.
9. a kind of high-performance honeycomb lithium ion button shape cell according to claim 1, it is characterised in that: the gasket is
One of nickel foam, stainless steel, copper, aluminium and its alloy.
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| CN201910197995.8A CN109817885A (en) | 2019-03-15 | 2019-03-15 | A kind of high-performance honeycomb lithium ion button shape cell |
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| CN113921899A (en) * | 2021-10-15 | 2022-01-11 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
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Application publication date: 20190528 |