CN108054356A - A kind of high security composite positive pole lithium ion battery - Google Patents
A kind of high security composite positive pole lithium ion battery Download PDFInfo
- Publication number
- CN108054356A CN108054356A CN201711272500.0A CN201711272500A CN108054356A CN 108054356 A CN108054356 A CN 108054356A CN 201711272500 A CN201711272500 A CN 201711272500A CN 108054356 A CN108054356 A CN 108054356A
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- Prior art keywords
- positive pole
- lithium ion
- ion battery
- composite positive
- battery
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- 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
- H01M4/362—Composites
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- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
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- 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
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- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Crystallography & Structural Chemistry (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of high security composite positive pole lithium ion batteries.The battery makes anode sizing agent using the composite material of the LiFePO4 composition of stratiform small particle cobalt acid lithium and olivine structural, is made according to a certain percentage after slurry and is applied directly to heating, drying on aluminium foil positive plate is made；Using graphite as negative electrode slurry, it is applied directly to heating, drying on copper foil and negative plate is made；Membrane is composite membrane, positive plate, membrane, negative plate is stacked and is wound square individual battery is made, with Laser Welding that cell package is good, reinjects electrolyte, is charged with the electric current not higher than 3A, and is carried out between 2.5V ~ 4.2V.The battery of the system has that security performance is high, have extended cycle life, good rate capability, the series of advantages such as environmentally protective, and suitable for higher to service life, low temperature requirements, maintenance period requires longer occasion.
Description
Technical field
The present invention relates to battery technology fields, particularly a kind of safe, good rate capability, the lithium ion of long-life two
Primary cell.
Background technology
Environmental pollution and energy crisis are two big problems of current facing mankind, therefore find a kind of cleaning, energy density
The high and recycled energy, it is that people are badly in need of to provide power producer for equipment such as automobile, electric tool, satellite, airships
It solves the problems, such as.Compared with other energy, lithium ion battery has energy density height, good cycle, memory-less effect, puts certainly
The advantages that electric rate is low and Environmental compatibility is good, huge hair is shown in fields such as Aeronautics and Astronautics, electric vehicle and electric tools
Open up potentiality.But with to lithium ion battery service life, the requirement of high rate performance it is higher and higher, the lithium ion battery of commercialization at present
It is difficult to realize the characteristics of security, service life and high rate performance are taken into account.In order to make full use of and play the advantage of lithium ion battery, gram
Take its there are the shortcomings that, countries in the world government, automaker and relevant technical personnel are to power lithium-ions battery power
Performance is paid much attention to, and puts into a large amount of human and material resources, financial resources are actively researched and developed.The performance of battery and the characteristic of positive electrode are close
Cut phase is closed, and the use of excellent positive electrode can significantly improve service life, high rate performance and the security performance of lithium ion battery, and right
Simplify battery manufacturing process, reduce battery production cost and have great importance.
The content of the invention
The technical problem to be solved by the present invention is to：A kind of high security composite positive pole lithium ion battery is provided, is solved
Existing battery cycle life is low, the problem of security performance and high rate performance difference.
Technical scheme：One kind with high security composite positive pole lithium ion battery, including mutually winding or
The positive plate and negative plate of superposition, the isolation film and electrolyte being interval between adjacent positive plate and negative plate.
It is described a kind of with high security composite positive pole lithium ion battery, with the stratiform small particle cobalt acid lithium (μ of D50≤6
M) and the LiFePO4 of olivine structural is as anode, using graphite as cathode, using lithium hexafluoro phosphate as electrolyte, with carbonic acid
Dimethyl ester, vinyl carbonate, methyl ethyl carbonate are solvent, using composite diaphragm as battery diaphragm, using winding or lamination process
Assemble.
After the high security composite positive pole uses high temperature drying prepared by mechanical mixing.
The composite positive pole each component content count by weight percentage, small particle cobalt acid lithium 80%~90%.
The negative electrode plate material formula count by weight percentage, includes active material graphite 87%~96%, conduction
Agent 2%~7% and binding agent 2%~6%.
The composite positive pole is 88%~92%, and conductive agent additive amount is 4%~6%, the additive amount of binding agent
For 3%~6%.
The conductive agent is conductive black, one or more kinds of mixing in carbon nanotubes, Ketjen black, graphene.
The conductive agent is threadiness or graininess, and binding agent is PVDF resins or Kynoar.
Beneficial effects of the present invention：Using high security composite positive pole, and the conductive agent of certain content is added, with drop
Internal resistance of the low lithium rechargeable battery in heavy-current discharge, reduces polarization phenomena, improves the discharge capability of battery.Therefore, originally
Invention be capable of providing it is a kind of have a safety feature, high rate performance is high, the lithium rechargeable battery that has extended cycle life, there is very big work
Industry and commercial value.
Suitable conductive agent is added in the formula of anode material for lithium-ion batteries, electric discharge electricity when can alleviate heavy-current discharge
The phenomenon that forcing down, so as to improve lithium ion battery in high rate performance.And corresponding preparation method, various substance dispersion ratios can be made
It is more uniform, be conducive to obtain surface density than more uniform anode pole piece, have very great help to promoting battery core uniformity.
Description of the drawings
Fig. 1 is the battery core figure of battery of the present invention；
Fig. 2 is that the pin of 1 high security composite positive pole lithium ion battery of the embodiment of the present invention pierces temperature changing curve diagram；
Fig. 3 is the short-circuit temperature changing curve diagram of 1 high security composite positive pole lithium ion battery of the embodiment of the present invention；
Fig. 4 overcharges temperature changing curve diagram for 1 high security composite positive pole lithium ion battery of the embodiment of the present invention；
Fig. 5 is the cyclic curve figure of 2 high security composite positive pole lithium ion battery of the embodiment of the present invention；
Fig. 6 is present invention process flow chart.
Specific embodiment
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings：
The present invention is high security composite positive pole lithium ion battery, which is assembled using winding process, just
Pole includes composite positive pole, conductive agent, binding agent, and cathode is graphite, conductive agent, binding agent, and electrolyte is lithium hexafluoro phosphate
(LiPF6), membrane can be composite diaphragm.Referring to the section of high safety type composite positive pole lithium ion battery cell of the present invention
Shown in figure Fig. 1, wherein 1 is membrane, 2 be cathode, and 3 be anode, and 4 be terminal adhesive tape.
Embodiment 1：
It is coated in after composite positive pole and conductive agent, binding agent are stirred evenly on aluminium collector, toasted, rolling etc.
Anode is made in process.The content 90% of anode small particle cobalt acid lithium.The species of conductive agent can be conductive carbon black, carbon nanotubes,
The total content of conductive agent is 5%.The species of binding agent is to gather inclined tetrafluoroethene, content 3.5%.
Coated on copper current collector after graphite and conductive agent, binding agent are stirred evenly, the processes such as toasted, rolling are made
Cathode.The content 93% of cathode graphite.The species of conductive agent can be conductive carbon black, carbon nanotubes, and the total content of conductive agent is
3.0%.The species of binding agent is butadiene-styrene rubber, sodium carboxymethylcellulose, content 4.0%.
The positive electrode, the negative electrode and the separator is wound by square electric cell using winding process.The height of negative plate is high with respect to positive plate
1mm~2mm, the height high 2mm~3mm of opposing negative polarity piece of membrane, square electric cell lug are located at left and right both sides.
Electrolyte be lithium hexafluoro phosphate as electrolyte, using dimethyl carbonate, vinyl carbonate, methyl ethyl carbonate to be molten
Agent.The reservoir quantity of electrolyte is about 4.5g/Ah.
By 45 DEG C of battery shelve 24 it is small when after be melted into, 2 batteries of fully charged random extraction of the battery after chemical conversion, an electricity
Pond carries out pin prick test, and Fig. 2 is temperature variation curve in the battery impact testing.Another battery carries out short-circuit test, and Fig. 3 is
Temperature variation curve in battery short circuit experiment.Separately a battery is taken to carry out overcharging experiment, rate of charge 1C.Fig. 4 is the electricity
Pond overcharges temperature variation curve in experiment.
Embodiment 2
It is coated in after composite positive pole and conductive agent, binding agent are stirred evenly on aluminium collector, toasted, rolling etc.
Anode is made in process.The content 80% of anode small particle cobalt acid lithium.The species of conductive agent can be conductive carbon black, carbon nanotubes,
The total content of conductive agent is 4%.The species of binding agent is to gather inclined tetrafluoroethene, content 3.5%.
Coated on copper current collector after graphite and conductive agent, binding agent are stirred evenly, the processes such as toasted, rolling are made
Cathode.The content 89% of cathode graphite.The species of conductive agent can be conductive carbon black, carbon nanotubes, and the total content of conductive agent is
7.0%.The species of binding agent is butadiene-styrene rubber, sodium carboxymethylcellulose, content 4.0%.
The positive electrode, the negative electrode and the separator is wound by square electric cell using winding process.The height of negative plate is high with respect to positive plate
1mm~2mm, the height high 2mm~3mm of opposing negative polarity piece of membrane, square electric cell lug are located at left and right both sides.
Electrolyte be lithium hexafluoro phosphate as electrolyte, using dimethyl carbonate, vinyl carbonate or methyl ethyl carbonate to be molten
Agent.The reservoir quantity of electrolyte is about 4.5g/Ah.
By 45 DEG C of battery shelve 24 it is small when after be melted into, battery is fully charged after chemical conversion carries out multiplying power discharging experiment.Table 1 is the electricity
Discharge data under the different multiplying of pond.Then cyclic test is carried out.Fig. 5 is the circulating battery graph.
The multiplying power discharging property of 1 high security composite positive pole lithium ion battery of the embodiment of the present invention of table
Claims (7)
1. one kind is with high security composite positive pole lithium ion battery, it is characterised in that：With stratiform small particle cobalt acid lithium and olive
The LiFePO4 of olive stone structure is as anode, using graphite as cathode, using lithium hexafluoro phosphate as electrolyte, with carbonic acid diformazan
Ester, vinyl carbonate, methyl ethyl carbonate are solvent, using composite diaphragm as battery diaphragm, are assembled using winding or lamination process
It forms.
2. high security composite positive pole lithium ion battery according to claim 1, it is characterised in that：The high safety
Property composite positive pole prepared using mechanical mixing after high temperature drying.
3. high security composite positive pole lithium ion battery according to claim 1, it is characterised in that：Anode composite material
Expect each component content count by weight percentage, small particle cobalt acid lithium 80%~90%.
4. high security composite positive pole lithium ion battery according to claim 1, it is characterised in that：The cathode
Sheet material material formula count by weight percentage, includes active material graphite 87%~96%, conductive agent 2%~7% and binding agent
2%~6%.
5. security composite positive pole lithium ion battery according to claim 1, it is characterised in that：It is described it is compound just
Pole material is 88%~92%, and conductive agent additive amount is 4%~6%, and the additive amount of binding agent is 3%~6%.
6. security composite positive pole lithium ion battery according to claim 1, it is characterised in that：The conductive agent
For the one or more mixing in conductive black, carbon nanotubes, Ketjen black, graphene.
7. security composite positive pole lithium ion battery according to claim 1, it is characterised in that：The conductive agent is
Threadiness or graininess, binding agent are PVDF resins or Kynoar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711272500.0A CN108054356A (en) | 2017-12-06 | 2017-12-06 | A kind of high security composite positive pole lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711272500.0A CN108054356A (en) | 2017-12-06 | 2017-12-06 | A kind of high security composite positive pole lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108054356A true CN108054356A (en) | 2018-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711272500.0A Pending CN108054356A (en) | 2017-12-06 | 2017-12-06 | A kind of high security composite positive pole lithium ion battery |
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| Country | Link |
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| CN (1) | CN108054356A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690428A (en) * | 2019-10-12 | 2020-01-14 | 洛阳超特电源科技有限公司 | High-rate lithium iron phosphate composite material, positive pole piece and lithium ion battery |
| CN115425277A (en) * | 2022-08-26 | 2022-12-02 | 江苏正力新能电池技术有限公司 | Lithium ion battery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553539A (en) * | 2003-05-26 | 2004-12-08 | 北京有色金属研究总院 | Lithium ion battery |
| CN101179138A (en) * | 2007-10-26 | 2008-05-14 | 中南大学 | Method of producing organic free radical polymer lithium ion battery |
| CN101212048A (en) * | 2006-12-30 | 2008-07-02 | 比亚迪股份有限公司 | Anode material of Li-ion secondary battery and battery containing the same |
| CN105655578A (en) * | 2015-12-17 | 2016-06-08 | 贵州梅岭电源有限公司 | Lithium ion secondary battery made from small-particle-size lithium cobalt oxide anode material |
| CN106025361A (en) * | 2016-05-27 | 2016-10-12 | 山东精工电子科技有限公司 | Low-temperature lithium ion battery |
-
2017
- 2017-12-06 CN CN201711272500.0A patent/CN108054356A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553539A (en) * | 2003-05-26 | 2004-12-08 | 北京有色金属研究总院 | Lithium ion battery |
| CN101212048A (en) * | 2006-12-30 | 2008-07-02 | 比亚迪股份有限公司 | Anode material of Li-ion secondary battery and battery containing the same |
| CN101179138A (en) * | 2007-10-26 | 2008-05-14 | 中南大学 | Method of producing organic free radical polymer lithium ion battery |
| CN105655578A (en) * | 2015-12-17 | 2016-06-08 | 贵州梅岭电源有限公司 | Lithium ion secondary battery made from small-particle-size lithium cobalt oxide anode material |
| CN106025361A (en) * | 2016-05-27 | 2016-10-12 | 山东精工电子科技有限公司 | Low-temperature lithium ion battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690428A (en) * | 2019-10-12 | 2020-01-14 | 洛阳超特电源科技有限公司 | High-rate lithium iron phosphate composite material, positive pole piece and lithium ion battery |
| CN115425277A (en) * | 2022-08-26 | 2022-12-02 | 江苏正力新能电池技术有限公司 | Lithium ion battery |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180518 |
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| RJ01 | Rejection of invention patent application after publication |