CN109509847A - A kind of miniature lithium ion battery and its manufacturing method - Google Patents
A kind of miniature lithium ion battery and its manufacturing method Download PDFInfo
- Publication number
- CN109509847A CN109509847A CN201710830349.1A CN201710830349A CN109509847A CN 109509847 A CN109509847 A CN 109509847A CN 201710830349 A CN201710830349 A CN 201710830349A CN 109509847 A CN109509847 A CN 109509847A
- Authority
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- China
- Prior art keywords
- sealing cover
- aluminium wire
- cylinder
- metal shell
- afflux
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 68
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 57
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000004411 aluminium Substances 0.000 claims abstract description 53
- 229910052751 metal Inorganic materials 0.000 claims abstract description 39
- 239000002184 metal Substances 0.000 claims abstract description 39
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 238000004513 sizing Methods 0.000 claims abstract description 20
- 239000002002 slurry Substances 0.000 claims description 15
- 239000011267 electrode slurry Substances 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 10
- 230000008023 solidification Effects 0.000 claims description 10
- 239000011149 active material Substances 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- 238000004108 freeze drying Methods 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 6
- 239000006258 conductive agent Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052493 LiFePO4 Inorganic materials 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 230000037237 body shape Effects 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 150000002576 ketones Chemical class 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000002242 deionisation method Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000005030 aluminium foil Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004804 winding Methods 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- 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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- 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
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
-
- 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
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- 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
- H01M4/64—Carriers or collectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a kind of miniature lithium ion battery and its manufacturing methods, are related to the manufacturing technology of lithium ion battery.Positive cylinder is coaxially plugged on cathode column body, and the outer wall tight diaphragm of positive cylinder, cathode cylinder are tightly disposed in metal shell, and metal shell upper end is embedded with sealing cover；Wherein, the positive cylinder includes afflux aluminium wire and anode sizing agent layer, and the lower end outer wall of afflux aluminium wire is enclosed with anode sizing agent layer, and anode sizing agent layer outer wall tight has diaphragm；The cathode cylinder pole pulp layer that is negative is tightly disposed in the inner wall of metal shell, and there is the hole with positive terminal mates at its middle part；Through-hole is provided in the middle part of the sealing cover, the afflux aluminium wire of positive cylinder is pierced by the outside for extending to sealing cover from the through-hole, and the contact surface of afflux aluminium wire and sealing cover is sealing structure.It is a kind of high-energy density and the pin type lithium ion battery convenient for manufacturing, and provides perfect solution for the power supply of miniaturized electronics.
Description
Technical field
The present invention relates to the manufacturing technologies of lithium ion battery, more particularly, to the manufacturing method of electrode, packaged type and dress
With mode, and in particular to a kind of miniature lithium ion battery and its manufacturing method.
Background technique
Lithium ion battery is as a kind of novel electrochmical power source, with excellent chemical property and the characteristics such as pollution-free.
With the promotion of people's living standard, various wearable small-sized electronic equipments are emerged, such as bluetooth headset, electronic pen
With intelligent glasses etc..
Common one positive plate of battery and a negative electrode tab are wound, in the cylindrical type electricity for diameter less than 5mm
For the smaller irregular battery of size (such as section is semicircle), pole piece length is too short in pond.Difficulty is manufactured, and
And energy density is relatively low.
Summary of the invention
The object of the present invention is to provide a kind of miniature lithium ion battery and its manufacturing method, it be a kind of high-energy density simultaneously
And convenient for the pin type lithium ion battery of manufacture, perfect solution is provided for the power supply of miniaturized electronics.
In order to solve the problems existing in background technology, the present invention adopts the following technical scheme: present invention firstly provides
A kind of miniature lithium ion battery, it includes positive cylinder, cathode cylinder, diaphragm, sealing cover and metal shell, the positive terminal
Body is coaxially plugged on cathode column body, and the outer wall tight diaphragm of positive cylinder, the cathode cylinder are closely arranged
In metal shell, metal shell upper end is embedded with sealing cover；Wherein, the positive cylinder includes afflux aluminium wire and anode
Pulp layer, the lower end outer wall of afflux aluminium wire is enclosed with anode sizing agent layer, and anode sizing agent layer outer wall tight has diaphragm；It is described
The cathode cylinder pole pulp layer that is negative be tightly disposed in the inner wall of metal shell, and its middle part has and positive terminal mates
Hole；It is provided with through-hole in the middle part of the sealing cover, the afflux aluminium wire of positive cylinder is pierced by from the through-hole extends to sealing cover
Outside, and the contact surface of afflux aluminium wire and sealing cover is sealing structure.
As a further improvement of the present invention；Metal shell between the sealing cover and cathode cylinder is provided with contracting
Mouthful.
As a further improvement of the present invention；It is an aluminium block with through-hole in the middle part of the sealing cover, outside aluminium block
Wall is closely provided with seal gasket.
As a further improvement of the present invention；The gap of the afflux aluminium wire and sealing cover is using solidification glue sealing structure
Or package sealing with laser structure.
As a further improvement of the present invention；The metal shell is steel shell.
The present invention also proposes a kind of manufacturing method of miniature lithium ion battery, comprises the following steps:
(a) positive cylinder is poured into special container by anode sizing agent, and afflux aluminium wire is inserted into slurry, reuses Freeze Drying Technique
Keep slurry dry, forms the positive cylinder with afflux aluminium wire of constancy of volume, the solid matter proportion of anode sizing agent is active matter
Matter: binder: conductive agent=95~98.5%:1%~2%:1%~4%, liquid substance are N- Jia base Bi Ka Wan ketone, are compared in the slurry
Example is 20%~30%, and active material is by one of cobalt acid lithium, LiMn2O4, nickle cobalt lithium manganate and LiFePO4 or a variety of forms；
(b) cathode cylinder is poured into metal shell by negative electrode slurry, metal bar of the centre insertion as positive cylinder body shape, then
Keep slurry dry using Freeze Drying Technique, forms cathode cylinder of the band with metal shell of constancy of volume, negative electrode slurry is consolidated
Body substance proportion is active material: binder: conductive agent=95.0~98.0%:1%~2%:1%~3%, liquid substance are deionization
Water, ratio is 50%~60% in the slurry, and active material is by one of graphite, carbonaceous mesophase spherules and silicon or a variety of forms；
(c) it is packed into negative terminal body after diaphragm will be wrapped around positive cylinder, electrolyte is injected after drying, using with holes
Seal cap sealing metal shell, the shape of sealing cover and the shape of shell aperture are consistent；
(d) the afflux aluminium wire of positive cylinder passes through the through-hole among sealing cover, the gap solidification glue of sealing cover and afflux aluminium wire
Or package sealing with laser does not need removal afflux aluminium wire beyond sealing if the position connected with solidification glue sealed aluminum band with seal
The part of lid can remove the afflux aluminium wire beyond sealing cover if being sealed with Laser Welding；
(e) battery after sealing can be used after charging, can be recycled as common lithium ion battery, shell is
Cathode, afflux aluminium wire or sealing cover are anode, and entire battery does not contain the necessary aluminium foil of conventional batteries and copper foil current collector.
After adopting the above technical scheme, the invention has the following advantages:
The present invention is a kind of high-energy density and the pin type lithium ion battery convenient for manufacturing, and is mentioned for the power supply of miniaturized electronics
Perfect solution is supplied.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of embodiment provided by the present invention；
Fig. 2 is the structural schematic diagram of positive cylinder in embodiment provided by the present invention；
Fig. 3 is the structural schematic diagram of cathode cylinder in embodiment provided by the present invention；
Fig. 4 is the structural schematic diagram of sealing cover in embodiment provided by the present invention；
Appended drawing reference:
1-afflux aluminium wire；2-anode sizing agent layers；3-diaphragms；4-metal shells；5-negative electrode slurry layers；6-sealing covers；
61-through-holes；62-aluminium blocks；63-seal gaskets；7-neckings.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing and specific implementation
Mode, the present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are only to explain this
Invention, is not intended to limit the present invention.
Please refer to Fig. 1-Fig. 4, present embodiment uses following technical scheme: a kind of miniature lithium ion battery and its system
Method is made, it includes afflux aluminium wire 1, anode sizing agent layer 2, diaphragm 3, metal shell 4, negative electrode slurry layer 5, sealing cover 6, through-hole
61, aluminium block 62, seal gasket 63 and necking 7；The afflux aluminium wire 1 and anode sizing agent layer 2 forms positive cylinder, afflux aluminium wire
1 lower end outer wall is enclosed with anode sizing agent layer 2, and 2 outer wall tight of anode sizing agent layer has diaphragm 3；Negative electrode slurry layer 5 is close
The inner wall composition cathode cylinder of metal shell 4 is set, and has the hole with positive terminal mates in the middle part of negative electrode slurry layer 5；Institute
The positive cylinder stated coaxially is plugged on cathode column body, and 4 upper end of metal shell is embedded with sealing cover 6, sealing cover 6
Middle part is the aluminium block 62 for having through-hole 61, and the outer wall of aluminium block 62 is closely provided with seal gasket 63, the afflux of positive cylinder
Aluminium wire 1 is pierced by the outside for extending to sealing cover 6 from the through-hole 61, and the gap of afflux aluminium wire 1 and sealing cover 6 uses solidification glue
Sealing structure or package sealing with laser structure；Necking is provided on metal shell 4 between the sealing cover 6 and cathode cylinder.
The metal shell 4 is generally steel shell.
The manufacturing method of present embodiment comprises the following steps:
(a) positive cylinder is poured into special container by anode sizing agent, and afflux aluminium wire is inserted into slurry, reuses Freeze Drying Technique
Keep slurry dry, forms the positive cylinder with afflux aluminium wire of constancy of volume, the solid matter proportion of anode sizing agent is active matter
Matter: binder: conductive agent=95~98.5%:1%~2%:1%~4%, liquid substance are N- Jia base Bi Ka Wan ketone, are compared in the slurry
Example is 20%~30%, and active material is by one of cobalt acid lithium, LiMn2O4, nickle cobalt lithium manganate and LiFePO4 or a variety of forms；
(b) cathode cylinder is poured into metal shell (generally steel shell) by negative electrode slurry, and the shape of metal shell is not limited to justify
Column type can be semicolumn or other abnormity.The metal bar more the same than positive cylinder body shape is inserted into centre, reuses freeze-drying
Technology keeps slurry dry, forms cathode cylinder of the band with metal shell of constancy of volume.The solid matter of negative electrode slurry matches
Active material: binder: conductive agent=95.0~98.0%:1%~2%:1%~3%.Liquid substance is deionized water, in the slurry
Ratio is 50%~60%.Active material is by one of graphite, carbonaceous mesophase spherules and silicon or a variety of forms；
(c) it is packed into negative terminal body (such as Fig. 3) after diaphragm 3 being wrapped around positive cylinder (such as Fig. 2), one is injected after drying
Quantitative electrolyte, using sealing cover (such as Fig. 4) sealing metal shell with holes, the shape of sealing cover and the shape of shell aperture
Unanimously, it is not necessarily circle；
(d) the afflux aluminium wire of positive cylinder passes through the through-hole among sealing cover, the gap solidification glue of sealing cover and afflux aluminium wire
Or package sealing with laser, finished battery appearance is referring to Fig. 1, if the position connected with solidification glue sealed aluminum band with seal, does not need
The part that afflux aluminium wire exceeds sealing cover is removed, if being sealed with Laser Welding, can remove the afflux aluminium wire beyond sealing cover；
(e) battery after sealing can be used after charging, can be recycled as common lithium ion battery.Shell is
Cathode, afflux aluminium wire or sealing cover are anode, and entire battery does not contain the necessary aluminium foil of conventional batteries and copper foil current collector.
A kind of high-energy density of the present invention and the pin type lithium ion battery convenient for manufacturing, solve as miniaturized electronics
The problem of power supply.
Embodiment:
It is described in conjunction with the embodiments diameter 4.5mm, the manufacturing process of length 25mm battery:
1, anode sizing agent pours into special container (length 25mm, internal diameter 3mm), pours into height 20mm.Centre insertion lower end size
0.3mm × L18mm, the aluminium wire of lower end size 1.0mm × L12mm.Formed after freeze-drying after positive cylinder take out to
With；
2, negative electrode slurry pours into the metal shell for being pre-placed 3m metal bar (length 28mm, internal diameter 4.3mm), pours into height
Spend 21mm.Metal bar is taken out after freeze-drying forms hollow cathode cylinder；
3, positive cylinder is 21mm with width, is put into the hollow interior of cathode cylinder with a thickness of 16 microns of one circle of diaphragm package；
4, entire component, which is put into equipment, makes metal shell after nozzle 6mm position necking, place into 85 degrees Celsius of bakings for 24 hours
Fluid injection 0.2g afterwards.Top cover labyrinth is covered, aluminium wire passes through sealing cover interstitial hole.Metal shell and sealing cover are riveted further using equipment
It rises；
5, the position that aluminium strip is connected with seal is welded with Laser Welding, removal aluminium wire exceeds the part of sealing cover, is formed and is implemented
Example battery.If the position connected with solidification glue sealed aluminum band with seal, the part that removal aluminium wire exceeds sealing cover is not needed；
6, by the present embodiment battery 25mA current discharge, sustainable 2h.Than the time that the winding battery of same size is higher by 1h.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, nothing
By from the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended
Claim rather than above description limit, it is intended that the institute that will be fallen within the meaning and scope of the equivalent elements of the claims
It changes and is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (6)
1. a kind of miniature lithium ion battery, which is characterized in that it includes positive cylinder, cathode cylinder, diaphragm, sealing cover and metal
Shell, the positive cylinder is coaxially plugged on cathode column body, and the outer wall tight diaphragm of positive cylinder, described
Cathode cylinder is tightly disposed in metal shell, and metal shell upper end is embedded with sealing cover；Wherein, the positive cylinder packet
Aluminium wire containing afflux and anode sizing agent layer, the lower end outer wall of afflux aluminium wire is enclosed with anode sizing agent layer, and anode sizing agent layer outer wall is tight
It is close to be enclosed with diaphragm；The cathode cylinder pole pulp layer that is negative is tightly disposed in the inner wall of metal shell, and its middle part have with
The hole of positive terminal mates；It is provided with through-hole in the middle part of the sealing cover, the afflux aluminium wire of positive cylinder is worn from the through-hole
The outside of sealing cover is extended to out, and the contact surface of afflux aluminium wire and sealing cover is sealing structure.
2. a kind of miniature lithium ion battery according to claim 1, which is characterized in that the sealing cover and cathode cylinder
Between metal shell be provided with necking.
3. a kind of miniature lithium ion battery according to claim 1, which is characterized in that be one in the middle part of the sealing cover
The outer wall of aluminium block with through-hole, aluminium block is closely provided with seal gasket.
4. a kind of miniature lithium ion battery according to claim 1, which is characterized in that the afflux aluminium wire and sealing cover
Gap using solidification glue sealing structure or package sealing with laser structure.
5. a kind of miniature lithium ion battery according to claim 1, which is characterized in that the metal shell is steel shell.
6. a kind of manufacturing method of miniature lithium ion battery, which is characterized in that it is comprised the following steps:
(a) positive cylinder is poured into special container by anode sizing agent, and afflux aluminium wire is inserted into slurry, reuses Freeze Drying Technique
Keep slurry dry, forms the positive cylinder with afflux aluminium wire of constancy of volume, the solid matter proportion of anode sizing agent is active matter
Matter: binder: conductive agent=95~98.5%:1%~2%:1%~4%, liquid substance are N- Jia base Bi Ka Wan ketone, are compared in the slurry
Example is 20%~30%, and active material is by one of cobalt acid lithium, LiMn2O4, nickle cobalt lithium manganate and LiFePO4 or a variety of forms；
(b) cathode cylinder is poured into metal shell by negative electrode slurry, metal bar of the centre insertion as positive cylinder body shape, then
Keep slurry dry using Freeze Drying Technique, forms cathode cylinder of the band with metal shell of constancy of volume, negative electrode slurry is consolidated
Body substance proportion is active material: binder: conductive agent=95.0~98.0%:1%~2%:1%~3%, liquid substance are deionization
Water, ratio is 50%~60% in the slurry, and active material is by one of graphite, carbonaceous mesophase spherules and silicon or a variety of forms；
(c) it is packed into negative terminal body after diaphragm will be wrapped around positive cylinder, electrolyte is injected after drying, using with holes
Seal cap sealing metal shell, the shape of sealing cover and the shape of shell aperture are consistent；
(d) the afflux aluminium wire of positive cylinder passes through the through-hole among sealing cover, the gap solidification glue of sealing cover and afflux aluminium wire
Or package sealing with laser does not need removal afflux aluminium wire beyond sealing if the position connected with solidification glue sealed aluminum band with seal
The part of lid can remove the afflux aluminium wire beyond sealing cover if being sealed with Laser Welding；
(e) battery after sealing can be used after charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710830349.1A CN109509847A (en) | 2017-09-15 | 2017-09-15 | A kind of miniature lithium ion battery and its manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710830349.1A CN109509847A (en) | 2017-09-15 | 2017-09-15 | A kind of miniature lithium ion battery and its manufacturing method |
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| Publication Number | Publication Date |
|---|---|
| CN109509847A true CN109509847A (en) | 2019-03-22 |
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|---|---|---|---|
| CN201710830349.1A Pending CN109509847A (en) | 2017-09-15 | 2017-09-15 | A kind of miniature lithium ion battery and its manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN110048166A (en) * | 2019-04-01 | 2019-07-23 | 浙江工业大学 | A kind of core strueture and preparation method thereof of high security lithium ion battery |
| CN110048166B (en) * | 2019-04-01 | 2021-01-26 | 浙江工业大学 | High-safety lithium ion battery cell structure and preparation method thereof |
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Application publication date: 20190322 |