CN105895949A - Preparation of cylindrical 2200mAh lithium ion power battery with high capacity and high current discharge - Google Patents
Preparation of cylindrical 2200mAh lithium ion power battery with high capacity and high current discharge Download PDFInfo
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- CN105895949A CN105895949A CN201410541558.0A CN201410541558A CN105895949A CN 105895949 A CN105895949 A CN 105895949A CN 201410541558 A CN201410541558 A CN 201410541558A CN 105895949 A CN105895949 A CN 105895949A
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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
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Abstract
The invention discloses a design of a cylindrical 18650-2200mAh lithium ion power battery with high capacity and high current discharge for electric tools and other electric appliances and the like as well as a manufacture method thereof. Especially a composite conductive additive and a high-adhesiveness electrode coating adhesive are used as an optimal design, so that capacity and discharge current of the power battery are improved, and the discharge power is increased. The battery comprises a positive plate, a negative plate, a diaphragm, electrolyte and a battery case; the positive plate is composed of an aluminium foil which is coated with anode slurry, and the negative plate is composed of a copper foil which is coated with cathode slurry; the anode slurry comprises an anode active material, a composite conductive agent, an adhesive, and the like; the cathode slurry comprises artificial graphite, a composite conductive agent, an adhesive, and the like; and the battery case is composed of a case and a combined cover cap. The optimal formula of the pole plates and a structure design are used, so that the battery has the characteristics of high specific capacity and low internal resistance, and a high current charge-discharge cycle performance; the battery is mainly used as a power supply for electric tools, gardening tools and other household electrical appliances.
Description
[technical field]
The present invention relates to that there is the column type 18650-2200mAh electric tool of high power capacity high-rate discharge ability, garden
Woods instrument and household electrical appliance lithium-ion-power cell design, manufacture method, belong to technical field of lithium ion secondary.
This battery comprises positive plate, negative plate, barrier film, electrolyte and battery case, and positive plate is made up of aluminium foil coating anode sizing agent,
Negative plate is made up of Copper Foil coating cathode size, and barrier film is to have the polypropylene of micropore or polyethylene or three-layer polypropylene/poly-second
Alkene/polypropylene composite film, battery case is made up of Stainless Steel Shell and block.Battery appearance is cylinder, body diameter
18mm, high 65mm, battery pole group is winding-type electrode assemblie.
[background technology]
China is the manufacture base of world's electric tool, and the electric tool market of China is huge to the demand of electrokinetic cell, with
Front electric tool mainly supports the use ickel-cadmium cell, and within 2005, Chinese Committee of Development and Reform file publishing clearly limits ickel-cadmium cell, drum
Encourage development lithium ion battery and Ni-H cell, the market share rapid development of current lithium ion battery.High power capacity, high power,
Low cost becomes the Main way of following electrokinetic cell development.Electric tool generally uses cylindrical 18650 batteries, i.e. battery
Diameter 18mm, high 65mm, capacity is mainly in the range of 1300-2000mAh.Along with user uses constantly carrying of requirement
Height, in the urgent need to more high power capacity and release the electrokinetic cell of more power to meet the application market of constantly extension (such as Gardener
Tool, household electrical appliance etc.).
Positive and negative pole material, electrolyte and technical recipe are the most important factor of the lithium ion battery preparing superperformance.Mesh
Anode material for lithium-ion batteries on front market mainly has cobalt acid lithium (LiCoO2), LiMn2O4 (LiMn2O4), ternary material
(Li(NixMnyCoz)O2) and LiFePO 4 (LiFePO4).Ternary material battery is superior because of its combination property, it has also become power
One of anode primary active material.Exploitation column type 18650-2200mAh has the dynamic of high-multiplying power discharge cycle characteristics
Power battery is increasingly welcome by household electrical appliance markets such as high-end electric tool, garden instrument and dust catchers.But meet these
The performance requirement of user also has much to be needed to improve.Use new formula design that the energy density per unit volume of battery is greatly improved, with
Time the charge discharge of battery to be improved and chemical physical stability energy, reach reduce the internal resistance of cell as far as possible and carry out big electricity
Stream high rate cyclic.This is accomplished by the selection to battery material, battery process parameter, electrode formulation and configuration aspects and carries out newly
Design.
[summary of the invention]
High power capacity 18650-2200mAh column type electric tool lithium-ion-power cell, all uses composite conducting in both positive and negative polarity
Agent, molecular weight is higher and has the electrode slurry binding agent that viscosity is stronger, and discharge and recharge and the impedance behavior of battery are had substantially by this
Improvement result.This battery, in addition to having capacity and being not less than 2200mAh, also can realize big electric current (such as 11A, 20A
Deng) discharge and recharge, discharge power improves, and cycle performance is superior, can meet current large power, electrically power driven tools, garden instrument and family
The requirement that the markets such as electrical appliance are new.
The lithium-ion-power cell that the present invention provides includes positive plate, negative plate, barrier film, electrolyte and battery case etc..
Described binding agent is that Kynoar PVDF HSV900 dissolves in nmp solvent.Combined conductive agent be Super P,
Two or more in electrically conductive graphite, Ketjen black, CNT, the cylinder 18650-2200mAh lithium ion that the present invention provides
Power battery anode manufacture method, comprises the following steps:
(1) by ternary positive electrode active material NMC (atomic ratio 5: 3: 2) and combined conductive agent (Super P, electrically conductive graphite,
In Ketjen black, CNT two kinds) it is placed in the nmp solvent containing binding agent PVDF HSV900, by stirring
Mixing forms anode sizing agent；
(2) anode sizing agent is coated on the metal Al paper tinsel of 15 μ m-thick, dries 80 DEG C of-125 DEG C of temperature ranges；
(3) by the positive pole roll-in dried, point bar, the anode pole piece of the band lug of specific dimensions is made；
Method for manufacturing negative pole, comprises the following steps:
(1) by graphous graphite powder and combined conductive agent (two kinds in Super P, electrically conductive graphite, Ketjen black, CNT)
It is placed in the nmp solvent containing binding agent PVDF HSV900, by stirring and evenly mixing formation cathode size；
(2) cathode size is coated on the metal copper foil of 9 μ m-thick, dries the temperature ranges of 80 DEG C-115 DEG C；
(3) by the negative pole roll-in dried, point bar, the negative plate of the band lug of specific dimensions is made；
The present invention provides the benefit that compared with traditional handicraft: the lithium-ion-power cell of manufacture of the present invention has higher electricity
Pond specific capacity (or energy density per unit volume), discharge capacity is not less than 2200mAh, close owing to suitably reducing electrode coating compacting
Degree, battery can realize more than 20A heavy-current discharge, and discharge power is high, and cycle performance is superior.
[accompanying drawing explanation]
Fig. 1 is the process flow diagram that the present invention makes battery.
Fig. 2 is the comparative example 1 made of the present invention and embodiment 1,2 battery 1C charging 11A (5C) discharges 500 times follow
Ring figure.
Fig. 3 is the comparative example 1 made of the present invention and embodiment 1,2 battery 1C charging 20A (5C) discharges 300 times follow
Ring figure.
[detailed description of the invention]
The present invention will be described to be exemplified below specific embodiment.
Comparative example 1:
As a example by manufacturing cylinder 18650-2200mAh lithium battery, select tap density at 2.1-2.9g/cm3, specific surface area
0.2-0.5m2/ g, D50In 7-15 μm, ternary NMC (5: 3: 2) of gram volume 150-170mAh/g is as positive-active material
Material.Select tap density at 1.0-1.3g/cm3, specific surface area 1.5-4.0m2/ g, D50At 9-17 μm, gram volume
The graphous graphite powder of 350-380mAh/g is as negative active core-shell material.
By positive electrode active materials that percentage by weight is 95.3%, 2.5%Super P, the Kynoar PVDF of 2.2%
6020, add in the 1-METHYLPYRROLIDONE solvent (NMP) accounting for gross weight 35% and mix, make anode sizing agent,
Being coated in by anode sizing agent on the metal aluminum foil of 16 μ m-thick, after the temperature range of 80-125 DEG C is dried, being rolled into thickness is
The positive plate that 120 ± 2mm is thick.
By graphous graphite powder that percentage by weight is 94.2%, the Super P of 1.5%, the Kynoar PVDF of 4.3%
6020, mix after adding the 1-METHYLPYRROLIDONE solvent (NMP) accounting for gross weight 55%, make cathode size,
Being coated in by cathode size on the metal copper foil of 9 μ m-thick, dried at a temperature of 80-115 DEG C, being rolled into thickness is
The negative plate that 0.125 ± 2mm is thick.
Use above parameter and manufacturing process, 18650 cylindrical lithium-ion power batteries made, capacity reaches 2205mAh,
Internal resistance of cell 14.3m Ω, the 11A discharge cycles life-span reaches more than 500 times, capacity dimension holdup more than 69%, and 20A electric discharge follows
The ring life-span reaches more than 300 times, and capacity retention rate is 63%.
Embodiment 1:
By positive electrode active materials that percentage by weight is 95.7%, 1.5%Super P, 1.0% Ketjen black, the poly-inclined fluorine of 1.8%
Ethene PVDF HSV900, adds in the 1-METHYLPYRROLIDONE solvent (NMP) accounting for gross weight 35% and mixes,
Make anode sizing agent, anode sizing agent is coated on the metal aluminum foil of 16 μ m-thick, dried at a temperature of 80-125 DEG C,
Being rolled into thickness is positive plate thick for 0.120 ± 2mm.
By graphous graphite powder that percentage by weight is 94.6%, 0.8%Super P, 0.8% Ketjen black, the polyvinylidene fluoride of 3.8%
Alkene PVDF HSV900, mixes after adding the 1-METHYLPYRROLIDONE solvent (NMP) accounting for gross weight 55%,
Make cathode size, cathode size is coated on the metal copper foil of 9 μ m-thick, dried at a temperature of 80-115 DEG C,
Being rolled into thickness is negative plate thick for 0.125 ± 2mm.
Positive/negative plate is cut into strip, at positive plate 1/3rd, reserves one section of tinsel soldering polar ear, negative pole
Sheet two ends also reserve one section of tinsel soldering polar ear, will be wound into cylindric pole group after positive/negative plate superposition, positive/negative plate it
Between place barrier film, barrier film used is the single layer polyethylene film of 16 μ m thick.The lug Laser Welding welding that positive plate is drawn
At sheet is confluxed in block, the lug that negative plate is drawn being welded to outer casing bottom, electrolyte vacuum injects, after sealing chemical conversion i.e.
It is assembled into 18650 batteries.
Use above parameter and manufacturing process, the 18650 cylindrical lithium-ion power battery capacity made up to 2215mAh,
Internal resistance of cell 13.8m Ω, the 11A discharge cycles life-span reaches more than 500 times, capacity dimension holdup 76%, the 20A discharge cycles longevity
Life reaches more than 300 times, capacity retention rate 68%.
Embodiment 2:
By positive electrode active materials that percentage by weight is 95.7%, 1.5%Super P, 1.0% carbon nano-fiber pipe, 1.8%
Kynoar PVDF HSV900, adds in the 1-METHYLPYRROLIDONE solvent accounting for gross weight 35% and mixes, system
Become anode sizing agent, anode sizing agent is coated on the metal aluminum foil of 16 μ m-thick, dried at a temperature of 80-125 DEG C, roller
Being pressed into thickness is positive plate thick for 0.120 ± 2mm.
By graphous graphite powder that percentage by weight is 94.6%, the CNT of 0.8%, 0.8% carbon nano-fiber pipe, 3.8%
Kynoar PVDF HSV900, add and mix after accounting for the 1-METHYLPYRROLIDONE solvent of gross weight 55%,
Make cathode size, cathode size is coated on the metal copper foil of 9 μ m-thick, dried at a temperature of 80-115 DEG C,
Being rolled into thickness is negative plate thick for 0.125 ± 2mm.
Positive/negative plate is cut into strip, at positive plate 1/3rd, reserves one section of tinsel soldering polar ear, negative pole
Sheet two ends also reserve one section of tinsel soldering polar ear, will be wound into cylindric pole group after positive/negative plate superposition, positive/negative plate it
Between place barrier film, barrier film used is the single layer polyethylene film of 16 μ m thick.The lug Laser Welding welding that positive plate is drawn
At sheet is confluxed in block, the lug that negative plate is drawn being welded to outer casing bottom, electrolyte vacuum injects, after sealing chemical conversion i.e.
It is assembled into 18650 batteries.
Use above parameter and manufacturing process, the 18650 cylindrical lithium-ion power battery capacity made up to 2223mAh,
Internal resistance of cell 13.5m Ω, the 11A discharge cycles life-span reaches more than 500 times, capacity dimension holdup 85%, the 20A discharge cycles longevity
Life reaches more than 300 times, capacity dimension holdup 73%.
Claims (5)
1. the column type 18650-2200mAh electric tool of high power capacity heavy-current discharge, garden instrument and household electrical appliance are used
Lithium-ion-power cell and manufacture method thereof, it is characterised in that this battery comprise positive plate, negative plate, barrier film, electrolyte and
Battery case, positive plate is made up of aluminium foil coating anode sizing agent, and negative plate is made up of Copper Foil coating cathode size, and barrier film is tool
There are the polypropylene of the 15-20 μ m thick of micropore or polyethylene or three-layer polypropylene/polyethylene/polypropylene laminated film, battery
Shell is made up of cylindrical nickel plating box hat and compound block.
The most according to claim 1, it is characterised in that anode sizing agent consists of nickel manganese cobalt acid lithium (Ni: Mn: Co atomic ratio
=5: 3: 2 or 6: 2: 2) ternary material (93%-96%), combined conductive agent (1%-6%), binding agent 1%-3% (percentage by weight
Than).
The most according to claim 1, it is characterised in that cathode size composition (percentage by weight) is main by Delanium
Powder (92%-96%), combined conductive agent (1%-6%) and binding agent (1%-5%) are constituted.
The most according to claim 2, it is characterised in that conductive agent is Super P, electrically conductive graphite, Ketjen black, carbon are received
Two or more composition in mitron, binding agent is that high viscosity Kynoar (PVDF HSV900 type) dissolves in N-methylpyrrole
In alkanone solvent (NMP) (4-10% percentage by weight).
The most according to claim 1, it is characterised in that battery appearance is cylinder, body diameter 18mm, high 65mm,
Battery pole group is winding-type electrode assemblie, and battery capacity is not less than 2200mAh, battery 1C and fills 11A (5C multiplying power) electric discharge
After circulating 500 times, capacity retention rate is not less than 76%, and after 1C fills 20A discharge cycles 300 times, capacity retention rate is not less than 68%.
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| CN201410541558.0A CN105895949A (en) | 2014-10-08 | 2014-10-08 | Preparation of cylindrical 2200mAh lithium ion power battery with high capacity and high current discharge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799813A (en) * | 2017-09-30 | 2018-03-13 | 中航锂电（江苏）有限公司 | A kind of high-energy-density ternary battery and preparation method thereof |
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| CN102340027A (en) * | 2011-09-21 | 2012-02-01 | 东莞市创明电池技术有限公司 | Lithium ion battery with high energy density |
| CN102449818A (en) * | 2010-03-31 | 2012-05-09 | 松下电器产业株式会社 | Positive electrode for lithium ion battery, method for producing same, and lithium ion battery using the positive electrode |
| CN103579563A (en) * | 2013-11-16 | 2014-02-12 | 江苏海四达电源股份有限公司 | Cylindrical rapid charging-type 2000mAh lithium-ion power battery and manufacturing method thereof |
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2014
- 2014-10-08 CN CN201410541558.0A patent/CN105895949A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102449818A (en) * | 2010-03-31 | 2012-05-09 | 松下电器产业株式会社 | Positive electrode for lithium ion battery, method for producing same, and lithium ion battery using the positive electrode |
| CN102340027A (en) * | 2011-09-21 | 2012-02-01 | 东莞市创明电池技术有限公司 | Lithium ion battery with high energy density |
| CN103579563A (en) * | 2013-11-16 | 2014-02-12 | 江苏海四达电源股份有限公司 | Cylindrical rapid charging-type 2000mAh lithium-ion power battery and manufacturing method thereof |
Non-Patent Citations (1)
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| 托马斯 B. 雷迪: "《电池手册：原著第四版》", 30 July 2013 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799813A (en) * | 2017-09-30 | 2018-03-13 | 中航锂电（江苏）有限公司 | A kind of high-energy-density ternary battery and preparation method thereof |
| CN107799813B (en) * | 2017-09-30 | 2021-02-02 | 中航锂电科技有限公司 | High-energy-density ternary battery and preparation method thereof |
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Application publication date: 20160824 |