CN104852030A - High-capacity and high-safety software package battery core - Google Patents
High-capacity and high-safety software package battery core Download PDFInfo
- Publication number
- CN104852030A CN104852030A CN201510174678.6A CN201510174678A CN104852030A CN 104852030 A CN104852030 A CN 104852030A CN 201510174678 A CN201510174678 A CN 201510174678A CN 104852030 A CN104852030 A CN 104852030A
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- CN
- China
- Prior art keywords
- soft pack
- pack cell
- power capacity
- high power
- lithium manganate
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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
- H01M4/364—Composites as mixtures
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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
- H01M4/50—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
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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
- H01M4/48—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
-
- 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
Abstract
The invention relates to a high-capacity and high-safety software package battery core. An anode material of the software package battery core comprises a mixed material of nickel-cobalt lithium manganate, lithium manganate, a conductive agent and a binding agent. Through application of the prepared high-capacity and high-safety software package battery core, the safety problem of a conventional ternary material battery core is solved; the weight ratio energy is improved in comparison to conventional lithium manganate and lithium iron phosphate; and a high-capacity and high-safety software package battery is obtained.
Description
Technical field
The present invention relates to soft bag lithium ionic cell battery core, particularly relate to that a kind of cost is low, performance good, the soft pack cell of the high power capacity high security that fail safe is high.
Background technology
Due to the energy and environmental problem increasingly serious, low-carbon economy has become the prevailing model of economic development.Hybrid vehicle and electric automobile, as the representative of new-energy automobile, obtain the accreditation of production firm and consumers in general gradually.Power battery pack is originated as the major impetus of new-energy automobile, has also become core component and the technology of electric automobile.
For the needs of fail safe and battery core module loss of weight, and the advantage of soft pack cell itself, soft pack cell replaces duricrust battery core to make electrokinetic cell.In order to adapt to the market demand of constantly change, increasing Li electricity manufacturer selects nickle cobalt lithium manganate as the positive electrode of lithium ion battery, improve gravimetric specific energy and the volumetric specific energy of battery core, but the security performance of nickle cobalt lithium manganate compared to LiFePO4 and LiMn2O4 poor.In order to solve the safety problem of nickle cobalt lithium manganate, material producer improves the security performance of nickle cobalt lithium manganate by different preparation methods etc., but adds material cost to battery manufacturers.
China Patent Publication No. CN 1529382 A, publication date on September 15th, 2004, name is called the patent of invention of high-power plastic lithium-ion cell, this application case discloses a kind of high-power plastic lithium-ion cell, comprise positive plate, negative plate, dielectric film material, electrolyte material, soft compound package material and plastic casing, positive plate comprises positive electrode, adhesive, DBP, carbon black, aluminium net, negative plate comprises negative material, adhesive, DBP, carbon black, copper mesh, membrane materials for electrolyte comprises adhesive, silicon dioxide, DBP, positive plate, negative plate and dielectric film make unit battery core by heating compound, by superimposed for unit battery core, after adopting composite film material packaging, form assembled battery, draw lug, make assembled battery just, negative pole by ear pole material with just, negative terminal connects, assembled battery is placed in plastics and body, lid and box body are merged by ultrasonic wave, form complete high-power plastic lithium-ion cell.Its weak point is, program cost is higher.
Summary of the invention
The object of the invention is to solve the higher defect of the existing cost improving the security performance of nickle cobalt lithium manganate and provide that a kind of cost is low, performance good, the soft pack cell of the high power capacity high security that fail safe is high.
To achieve these goals, the present invention is by the following technical solutions:
A soft pack cell for high power capacity high security, the positive electrode of described soft pack cell comprises the composite material of nickle cobalt lithium manganate, LiMn2O4, conductive agent, binding agent.In the technical program, under the synergy of nickle cobalt lithium manganate and LiMn2O4, the gram volume of battery material is improved, thus the battery core made under same process condition improves its gravimetric specific energy.Nickle cobalt lithium manganate, with high power capacity, low material cost, more stable, is layered composite structure material, under higher charging voltage, can has higher specific capacity; Under different temperatures and multiplying power, structural change is less, so material has good stability, owing to adopting nickel manganese to replace expensive cobalt, makes material have the price of relative moderate; What the gram volume of material can be made to play is higher, and improve the volume energy density of battery, capacity is high, and cost performance is good; Improve the content energy of nickel, greatly promote the specific capacity of material, the content reducing cobalt can reduce material cost again, has the features such as specific capacity is high, cycle performance is excellent, high-temperature storage performance is good.
As preferably, each constituent mass mark of positive electrode is respectively: the nickle cobalt lithium manganate of 20-40%, the LiMn2O4 of 51-75%, the conductive agent of 3-6% and the binding agent of 2-4%.
As preferably, nickle cobalt lithium manganate is LiNi
xco
ymn
zo
2, x+y+z=1, and 0.8>=x>=0.5,0.3>=y>=0.1,0.2>=z>=0.1.
As preferably, the barrier film of described soft pack cell is one side coating ceramic barrier film.
As preferably, one side coating ceramic membrane thicknesses 25-30 μm, the thickness of coating is 2-5 μm.
As preferably, in use, coat side is in the face of negative pole, and negative pole is completely coated for one side coating ceramic barrier film.
As preferably, conductive agent is conductive black and electrically conductive graphite.
As preferably, the mass ratio of conductive black and electrically conductive graphite is 1:2.
As preferably, the coating of one side coating ceramic barrier film is graphene oxide or alumina in Nano level.
The invention has the beneficial effects as follows
1) high, the good cycle of the soft pack cell specific capacity prepared of the present invention;
2) application of the soft pack cell of high power capacity high security prepared of the present invention, improves the safety problem of ternary material battery core in the past, and has done lifting than the gravimetric specific energy of conventional LiMn2O4, LiFePO4, the high and soft-package battery of safety of the capacity that obtains.
Embodiment
Below by way of specific embodiment, the present invention is further explained:
Electrically conductive graphite, conductive black, binding agent all can be buied from market.
Conductive black is conductive agent Super P Li, and electrically conductive graphite is conductive agent KS-6, and binding agent is HSV900.
The technique that the present invention prepares soft pack cell adopts existing preparation technology.
Embodiment 1
A kind of soft pack cell of high power capacity high security, on existing basis of preparing soft pack cell technique, positive electrode is replaced by the composite material of nickle cobalt lithium manganate, LiMn2O4, conductive agent, binding agent, each constituent mass mark of positive electrode is respectively: the nickle cobalt lithium manganate of 20%, the LiMn2O4 of 75%, the conductive black of 1%, the binding agent of electrically conductive graphite 2% and 2%, nickle cobalt lithium manganate is LiNi
0.8co
0.1mn
0.1o
2in preparation process, the barrier film of soft pack cell is one side coating ceramic barrier film, one side coating ceramic membrane thicknesses 25 μm, the thickness of coating is 2 μm, and in use, coat side is in the face of negative pole for one side coating ceramic barrier film, negative pole is completely coated, and the coating of one side coating ceramic barrier film is graphene oxide.
Embodiment 2
A kind of soft pack cell of high power capacity high security, on existing basis of preparing soft pack cell technique, positive electrode is replaced by the composite material of nickle cobalt lithium manganate, LiMn2O4, conductive agent, binding agent, each constituent mass mark of positive electrode is respectively: the nickle cobalt lithium manganate of 30%, the LiMn2O4 of 62%, the conductive black of 1.5%, the electrically conductive graphite of 3% and 3.5% binding agent, nickle cobalt lithium manganate is LiNi
0.6co
0.3mn
0.1o
2in preparation process, the barrier film of soft pack cell is one side coating ceramic barrier film, one side coating ceramic membrane thicknesses 28 μm, the thickness of coating is 3 μm, and in use, coat side is in the face of negative pole for one side coating ceramic barrier film, negative pole is completely coated, and the coating of one side coating ceramic barrier film is alumina in Nano level.
Embodiment 3
A kind of soft pack cell of high power capacity high security, on existing basis of preparing soft pack cell technique, positive electrode is replaced by the composite material of nickle cobalt lithium manganate, LiMn2O4, conductive agent, binding agent, each constituent mass mark of positive electrode is respectively: the nickle cobalt lithium manganate of 40%, the LiMn2O4 of 51%, the conductive black of 2%, the electrically conductive graphite of 4% and 3% binding agent, nickle cobalt lithium manganate is LiNi
0.5co
0.3mn
0.2o
2in preparation process, the barrier film of soft pack cell is one side coating ceramic barrier film, one side coating ceramic membrane thicknesses 30 μm, the thickness of coating is 5 μm, and in use, coat side is in the face of negative pole for one side coating ceramic barrier film, negative pole is completely coated, and the coating of one side coating ceramic barrier film is graphene oxide.
The soft pack cell that embodiment 1-3 is obtained is assembled into flexible-packed battery.
Comparative example 1, positive electrode selects nickle cobalt lithium manganate, and all the other are identical with embodiment 1.
Comparative example 2, positive electrode selects cobalt acid lithium, and all the other are identical with embodiment 1.
Comparative example 3, positive electrode selects LiMn2O4, and all the other are identical with embodiment 1.
The soft pack cell that comparative example 1-3 is obtained is assembled into flexible-packed battery.
Battery in battery in embodiment 1 and comparative example 1 is carried out 1C/1C charge-discharge test under discharge and recharge cut-ff voltage is 2.7-4.2V condition, and following form is the information of the capacity of two kinds of batteries, weight, energy density:
| Battery capacity (Ah) | Battery weight (g) | Battery energy density (Wh/kg) | |
| Embodiment 1 | 58.5 | 830 | 170 |
| Embodiment 2 | 55.7 | 820 | 169 |
| Embodiment 3 | 56.9 | 821 | 171 |
| Comparative example 1 | 35.5 | 810 | 183 |
| Comparative example 2 | 38.4 | 809 | 179 |
| Comparative example 3 | 38.3 | 808 | 178 |
As seen from the above table, under same battery system, the energy density of embodiment 1-3 battery is also a little less than comparative example 1-3 battery.Through the charge and discharge cycles of 550 weeks, the capability retention of embodiment 1-3 battery was 87.79%, and the capability retention of comparative example 1-3 battery is 71.98%.Sum up above result known, the energy density of embodiment 1-3 battery has reduction slightly compared with comparative example 1-3, but it is little to reduce amplitude influences, and cycle performance is but greatly improved simultaneously.
Claims (9)
1. a soft pack cell for high power capacity high security, is characterized in that, the positive electrode of described soft pack cell comprises the composite material of nickle cobalt lithium manganate, LiMn2O4, conductive agent, binding agent.
2. the soft pack cell of a kind of high power capacity high security according to claim 1, is characterized in that, each constituent mass mark of positive electrode is respectively: the nickle cobalt lithium manganate of 20-40%, the LiMn2O4 of 51-75%, the conductive agent of 3-6% and the binding agent of 2-4%.
3. the soft pack cell of a kind of high power capacity high security according to claim 1, is characterized in that, nickle cobalt lithium manganate is LiNi
xco
ymn
zo
2, x+y+z=1, and 0.8>=x>=0.5,0.3>=y>=0.1,0.2>=z>=0.1.
4. the soft pack cell of a kind of high power capacity high security according to claim 1, is characterized in that, the barrier film of described soft pack cell is one side coating ceramic barrier film.
5. the soft pack cell of a kind of high power capacity high security according to claim 4, is characterized in that, one side coating ceramic membrane thicknesses 25-30 μm, and the thickness of coating is 2-5 μm.
6. the soft pack cell of a kind of high power capacity high security according to claim 1 or 4 or 5, is characterized in that, in use, coat side is in the face of negative pole, and negative pole is completely coated for one side coating ceramic barrier film.
7. the soft pack cell of a kind of high power capacity high security according to claim 1 or 2 or 3 or 4, it is characterized in that, conductive agent is conductive black and electrically conductive graphite.
8. the soft pack cell of a kind of high power capacity high security according to claim 7, is characterized in that, the mass ratio of conductive black and electrically conductive graphite is 1:2.
9. the soft pack cell of a kind of high power capacity high security according to claim 6, is characterized in that, the coating of one side coating ceramic barrier film is graphene oxide or alumina in Nano level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510174678.6A CN104852030A (en) | 2015-04-14 | 2015-04-14 | High-capacity and high-safety software package battery core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510174678.6A CN104852030A (en) | 2015-04-14 | 2015-04-14 | High-capacity and high-safety software package battery core |
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| CN104852030A true CN104852030A (en) | 2015-08-19 |
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| CN201510174678.6A Pending CN104852030A (en) | 2015-04-14 | 2015-04-14 | High-capacity and high-safety software package battery core |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106129455A (en) * | 2016-08-30 | 2016-11-16 | 上海大学 | Lithium-sulfur cell |
| CN107834062A (en) * | 2017-11-20 | 2018-03-23 | 中山市电赢科技有限公司 | A kind of anode constituents of rate battery |
| CN109524709A (en) * | 2017-09-20 | 2019-03-26 | 成功大学 | Lithium battery |
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| US20030194607A1 (en) * | 2002-04-10 | 2003-10-16 | Sui-Yang Huang | Polymer-gel lithium ion battery |
| JP2005216659A (en) * | 2004-01-29 | 2005-08-11 | Toppan Printing Co Ltd | Lithium secondary battery |
| JP2011233368A (en) * | 2010-04-27 | 2011-11-17 | Hitachi Maxell Energy Ltd | Lithium ion secondary battery |
| CN103346346A (en) * | 2013-06-13 | 2013-10-09 | 东莞电子科技大学电子信息工程研究院 | High-performance long-life lithium battery |
| CN104425795A (en) * | 2013-09-10 | 2015-03-18 | 浙江万向亿能动力电池有限公司 | High-energy and high-safety lithium ion power battery |
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2015
- 2015-04-14 CN CN201510174678.6A patent/CN104852030A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030194607A1 (en) * | 2002-04-10 | 2003-10-16 | Sui-Yang Huang | Polymer-gel lithium ion battery |
| JP2005216659A (en) * | 2004-01-29 | 2005-08-11 | Toppan Printing Co Ltd | Lithium secondary battery |
| JP2011233368A (en) * | 2010-04-27 | 2011-11-17 | Hitachi Maxell Energy Ltd | Lithium ion secondary battery |
| CN103346346A (en) * | 2013-06-13 | 2013-10-09 | 东莞电子科技大学电子信息工程研究院 | High-performance long-life lithium battery |
| CN104425795A (en) * | 2013-09-10 | 2015-03-18 | 浙江万向亿能动力电池有限公司 | High-energy and high-safety lithium ion power battery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106129455A (en) * | 2016-08-30 | 2016-11-16 | 上海大学 | Lithium-sulfur cell |
| CN109524709A (en) * | 2017-09-20 | 2019-03-26 | 成功大学 | Lithium battery |
| CN107834062A (en) * | 2017-11-20 | 2018-03-23 | 中山市电赢科技有限公司 | A kind of anode constituents of rate battery |
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Application publication date: 20150819 |