CN108777511A - A kind of Intelligent household type energy interacted system - Google Patents
A kind of Intelligent household type energy interacted system Download PDFInfo
- Publication number
- CN108777511A CN108777511A CN201810542344.3A CN201810542344A CN108777511A CN 108777511 A CN108777511 A CN 108777511A CN 201810542344 A CN201810542344 A CN 201810542344A CN 108777511 A CN108777511 A CN 108777511A
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- direct current
- life
- positive electrode
- 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.)
- Withdrawn
Links
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 55
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000002131 composite material Substances 0.000 claims abstract description 49
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 39
- 239000000446 fuel Substances 0.000 claims abstract description 39
- 239000000126 substance Substances 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 54
- 239000002243 precursor Substances 0.000 claims description 48
- 239000007774 positive electrode material Substances 0.000 claims description 38
- 229910021389 graphene Inorganic materials 0.000 claims description 22
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 20
- 229930006000 Sucrose Natural products 0.000 claims description 20
- 239000005720 sucrose Substances 0.000 claims description 20
- 239000010405 anode material Substances 0.000 claims description 15
- 239000010406 cathode material Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 238000001694 spray drying Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 4
- 238000003487 electrochemical reaction Methods 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 238000005253 cladding Methods 0.000 abstract 1
- 239000002019 doping agent Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 11
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000010248 power generation Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 229910052493 LiFePO4 Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000006258 conductive agent Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000000629 steam reforming Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 150000003016 phosphoric acids Chemical class 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910012820 LiCoO Inorganic materials 0.000 description 1
- 229910010710 LiFePO Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000006057 reforming reaction Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- -1 silver and copper Chemical class 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
-
- 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
- H01M8/00—Fuel cells; Manufacture thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
-
- H02J3/383—
-
- H02J3/387—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/30—The power source being a fuel cell
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention relates to a kind of Intelligent household type energy interacted systems, including solar cell, fuel cell, lithium ion battery, DC/AC inverters, AC/DC rectifiers, commutator transformer；The lithium ion battery includes positive electrode, which is a kind of LiFe0.91Zn0.09PO4/ C composite positive poles；Wherein, dopants of the Zn as Fe, C is as LiFe0.91Zn0.09PO4Cladding substance；And coat LiFe with organic/inorganic compounded carbons0.91Zn0.09PO4。
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a household intelligent energy interconnection system.
Background
A fuel cell is a power generation device that directly converts chemical energy of fuel into direct current electrical energy. The working principle is that chemical energy of substances is converted into electric energy through electrochemical reaction, substances required by the chemical reaction of the fuel cell are continuously supplemented from the outside, and the electric energy and the heat energy can be continuously output as long as fuel is supplied. In short, a fuel cell is an energy conversion device.
The hydrogen gas may be provided by a reformer. The raw material used for the reformer may be various hydrocarbons such as natural gas, gasoline, and diesel oil, and various alcohol fuels such as methanol and alcohol. The reforming technology used at present is mainly steam reforming, the hydrogen content produced by the steam reforming method is high, and more than half of the hydrogen in the world is produced by steam reforming. By adopting the method, the fuel and the steam are mixed and then enter the reformer, and the reforming reaction is carried out under the action of high temperature and catalyst to generate the hydrogen. The fuel used can be natural, methanol and other light hydrocarbon fuels.
A solar cell is a device that converts solar energy into electrical energy using the photoelectric effect of a semiconductor material. The principle is a photovoltaic effect, the solar cell is a semiconductor photodiode, and when sunlight irradiates the photodiode, the photodiode can convert solar energy into electric energy to generate current. When a plurality of batteries are connected in series or in parallel, a solar battery matrix with larger output power can be formed.
The conventional solar power generation system has more defects, and the generated electric energy is difficult to directly and conveniently utilize due to the instability of solar energy, and the electric energy is easy to damage a power grid if fed back to the power grid. In addition, for a common household power grid, the electric energy generated by a solar power generation system is put into practical use through a plurality of steps of direct current/alternating current inversion, rectification and voltage reduction, according to investigation, the optimal efficiency of an inverter and a rectifier used in domestic markets is between 90% and 95%, therefore, in the process of converting direct current generated by power generation into alternating current and then converting the alternating current into the direct current, the energy ratio of loss is calculated by taking an intermediate value, and the loss is 1-0.92 × 0.92-15.36%, which obviously causes great energy loss.
Common household appliances except for washing machines and other appliances with motors inside, the most direct electric energy demand is direct current, so that the appliances usually need to be provided with matched power conversion equipment to convert alternating current into required direct current through rectification and then reduce the voltage for use.
Disclosure of Invention
The invention aims to provide a household intelligent energy interconnection system to solve the problems.
The embodiment of the invention provides a household intelligent energy interconnection system, which comprises a solar battery, a fuel battery, a lithium ion battery, a DC/AC inverter, an AC/DC rectifier and a direct current transformer, wherein the solar battery is connected with the fuel battery;
the solar cell is used for directly converting light energy into electric energy through a photoelectric effect or a photochemical effect; the fuel cell is a hydrogen-oxygen fuel cell and is used for carrying out hydrogen-oxygen electrochemical reaction and converting the chemical energy of hydrogen into electric energy; the lithium ion battery is used for storing electric energy and directly supplying power to household appliances; the DC/AC inverter is used for inverting the direct current of the lithium ion battery into alternating current to feed back to a mains supply power grid, so that the waste of electric energy is avoided; the AC/DC rectifier is used for converting alternating current of a mains supply grid into direct current for household appliances; the direct current transformer is used for reducing the voltage of the 220V direct current to the voltage required by the household appliance; the lithium ion battery is respectively connected with the input end of the direct current transformer and the input end of the DC/AC inverter, and the output end of the DC/AC inverter is connected with the commercial power grid; the commercial power grid is connected with the input end of the AC/DC rectifier, and the output end of the AC/DC rectifier is connected with the household appliance; the output end of the direct current transformer is connected with a household appliance; a solar cell and a fuel cell are connected between the lithium ion battery and the input end of the direct current transformer;
the lithium ion battery comprises a positive electrode material, and the positive electrode material is LiFe0.91Zn0.09PO4a/C composite positive electrode material; wherein Zn is used as a doping substance of Fe, and C is used as LiFe0.91Zn0.09PO4The coating substance of (1); and, coating LiFe with organic/inorganic composite carbon source0.91Zn0.09PO4。
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
1) the solar battery power supply system can reduce energy loss caused by multiple alternating current-direct current conversions in the power supply process of the solar battery, can improve the energy utilization rate through multiple energy sources and optimized management of the controller, ensures full utilization of solar power generation energy, improves the user experience of resident power utilization, and has good economic and popularization values;
2) in the lithium ion battery of the invention, the anode material is LiFe1-xZnxPO4the/C composite positive electrode material adopts the doping of Zn to enhance the strength of P-O bonds, so that the charge transfer resistance of the positive electrode material is reduced, and Li is enabled+The diffusion is easier, the electronic conductivity and the ionic conductivity of the anode material are obviously improved, and unexpected technical effects are generated.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a block diagram of the system architecture of the present invention;
FIG. 2 is a schematic diagram of the energy management of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
With reference to fig. 1 and 2, an embodiment of the invention relates to a home intelligent energy interconnection system, which includes a solar battery, a fuel cell, a lithium ion battery, a DC/AC inverter, an AC/DC rectifier, and a DC transformer;
solar cells are used to directly convert light energy into electrical energy through the photoelectric effect or the photochemical effect; the fuel cell is a hydrogen-oxygen fuel cell and is used for carrying out hydrogen-oxygen electrochemical reaction and converting the chemical energy of hydrogen into electric energy; the lithium ion battery is used for storing electric energy and directly supplying power to household appliances; the DC/AC inverter is used for inverting the direct current of the lithium ion battery into alternating current to feed back to a mains supply power grid, so that the waste of electric energy is avoided; the AC/DC rectifier is used for converting alternating current of a mains supply grid into direct current for household appliances; the direct current transformer is used for reducing the voltage of the 220V direct current to the voltage required by the household appliance;
the lithium ion battery is respectively connected with the input end of the direct current transformer and the input end of the DC/AC inverter, and the output end of the DC/AC inverter is connected with the commercial power grid; the commercial power grid is connected with the input end of the AC/DC rectifier, and the output end of the AC/DC rectifier is connected with the household appliance; the output end of the direct current transformer is connected with the household appliance; and a solar cell and a fuel cell are connected between the lithium ion battery and the input end of the direct current transformer.
The solar battery, the fuel battery and the lithium ion battery are all connected with the controller, and the controller is used for monitoring the real-time states of the fuel battery, the solar battery and the lithium ion battery and controlling the distribution and mutual transmission of power supply; the controller is used for monitoring and optimizing the whole power supply system, and power supply requirements can be reasonably distributed to the fuel cell, the solar cell, the lithium ion battery and the commercial power network. When the lithium ion battery is saturated, the controller can enable the lithium ion battery to feed back electric energy to the power grid through the inverter, so that the generated redundant electric energy is not wasted, and the electric energy is fully utilized. Compared with the traditional household power grid, the solar household power grid has the advantages that damage to the power grid caused by unstable voltage of solar power generation is avoided due to the introduction of the lithium ion battery.
The electric energy generated by the fuel cell and the solar cell is stored in the lithium ion battery in a way of charging the lithium ion battery, the lithium ion battery directly supplies power to the household appliance network, the daily power consumption of three families is generally less than 10kWh, and the demand can be met by matching a 20kWh capacity type lithium ion battery in consideration of possible power consumption peak. In special cases (e.g. cloudy days or insufficient supply of hydrogen fuel), the utility grid can also be used to power household appliances or to charge lithium ion batteries via an AC/DC rectifier.
Solar cell and fuel cell pass through the electron thermostat and link to each other with the radiator to carry out thermal management control through the controller, make solar cell and the heat energy that the fuel cell electricity generation in-process produced can by make full use of, these heats can be according to the demand for domestic water heating and heating, thereby reduce the waste of energy.
The invention reduces the conversion times between alternating current and direct current, reduces unnecessary energy loss and improves the energy utilization rate, the direct current generated by the traditional solar energy is firstly converted into 220V alternating current, and when the household appliance is used, the direct current is converted into the direct current through the power adapter and then is reduced in voltage for use. The system can omit the first two steps, the direct current generated by the solar battery and the fuel cell is used for charging the lithium ion battery, the lithium ion battery directly provides the direct current, and the electric appliance can be used only by reducing the voltage.
The system only needs to advance the step of rectification in the traditional power adapter of the electrical appliance to the step of entering the AC into the home, and no more electrical equipment is introduced; the hydrogen required by the fuel cell system can be obtained by reforming hydrocarbon fuels such as natural gas or methanol, and the source is rich.
The solar energy power generation system can reduce energy loss caused by multiple alternating current-direct current conversions in the power supply process of the solar cell, can improve the energy utilization rate through multiple energy sources and optimized management of the controller, ensures full utilization of solar power generation energy, improves user experience of residential electricity utilization, and has good economic and popularization values.
In particular, lithium ion batteries, which are a kind of secondary batteries, are important media for the rational and effective utilization of energy. The lithium ion battery has the advantages of high energy density, long cycle life, low self-discharge, no memory effect, no pollution and the like, and is generally formed by assembling a current collector, a positive electrode material, a negative electrode material, a diaphragm, electrolyte and a battery shell; wherein,the positive electrode material plays a decisive role in the performance of the lithium ion battery. However, at present, LiCoO is used as a raw material2Typical conventional transition metal oxide type positive electrode materials are limited by inherent disadvantages, and the effects thereof are difficult to exert, LiFePO4Is considered to be one of the most promising lithium ion cathode materials, and is in line with the commercial significance of batteries for design and development.
The technical scheme of the invention provides a high-efficiency lithium ion battery based on the prior art, wherein the lithium ion battery comprises a positive electrode material, and specifically, the positive electrode material is LiFe1-xZnxPO4The particle size of the particles in the positive electrode material is 40 nm; wherein Zn is used as a doping substance of Fe, and C is used as LiFe1-xZnxPO4The coating substance of (1); and, coating LiFe with organic/inorganic composite carbon source1-xZnxPO4. For increasing LiFePO4The performance of the anode material can play a certain role by coating a conductive substance or doping, however, the two materials are not reported to be used in combination in the prior art; in the technical scheme, doping and carbon coating are combined, and the composite anode material obtains unexpected beneficial effects through doping and carbon coating, so that the high multiplying power and the cycling stability are obviously improved.
LiFePO4The lithium ion battery anode material has the advantages of high theoretical capacity, stable structure, low price, good safety and the like, and is the most promising lithium ion battery anode material. Because the phosphoric acid series anode material has low conductivity and poor high-current charge and discharge performance, the application of the phosphoric acid series anode material in practice is limited, and therefore, the improvement of the electronic conductivity and the ion diffusion coefficient of the material and the contact between an electrode and electrolyte are the key points for improving the high-rate performance of the material; in the prior art, the electron conductivity between particles can be improved by coating, and due to the excellent conductivity of metals such as silver and copper, the LiFePO is usually coated by metal materials such as silver and copper4Coating is carried out; or coated with a carbon source, however, typically a single carbon source or metal; in a preferred embodiment of the present invention, the organic compound isThe/inorganic composite carbon source is a sucrose/graphene composite carbon source, and the positive electrode material is prepared by coating the organic/inorganic dual carbon source, so that on one hand, the electrical contact among positive electrode material particles is improved, the material conductivity is improved, on the other hand, crystal nucleus growth points can be provided for crystal growth, the grain growth is inhibited, the grain size is controlled, the specific surface area of the grains is increased, and the LiFe is prepared1- xZnxPO4the/C composite positive electrode material has the advantages of small nanoscale, high specific surface area, high conductivity and the like, and has unexpected beneficial effects. In addition, graphene is a novel two-dimensional nano material, has super-strong conductivity, and is the best material for the current conductivity. Graphene has high specific surface area, electron mobility and thermal conductivity; graphene and sucrose are combined to be used as a carbon source to coat LiFe1-xZnxPO4The composite positive electrode material can provide crystal nucleus growing points for crystal growth, inhibit the growth of crystal grains to control the grain diameter, and improve the specific surface area of the crystal grains, thereby having unexpected beneficial effects on the improvement of the conductivity of the composite positive electrode material.
In a preferred embodiment, the LiFe is as described above1-xZnxPO4The carbon content in the/C composite positive electrode material is 11.6%. And the mass ratio of the sucrose to the graphene in the sucrose/graphene composite carbon source is 2: 5. Under the control of the mass ratio, the composite cathode material can exert the optimal technical effect.
In a preferred embodiment, LiFe1-xZnxPO4In the/C composite cathode material, the value of X is 0.09, namely, the cathode material is LiFe0.91Zn0.09PO4the/C composite cathode material. Under the doping proportion, the composite cathode material can exert the optimal technical effect. For increasing LiFePO4The performance of the cathode material is improved by adopting lithium-site or iron-site doping, which is also considered to be the most effective means at present, however, at present, no technical scheme adopting Zn doping is available. In the present application, by doping with Zn, increaseStrengthens the strength of P-O bond, leads to the reduction of the charge transfer resistance of the anode material, and leads to the Li+The diffusion is easier, the electronic conductivity and the ionic conductivity of the anode material are obviously improved, and unexpected technical effects are generated.
The present invention will be described in detail by way of examples. It is also to be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the invention, and that certain insubstantial modifications and adaptations of the invention by those skilled in the art may be made in light of the above teachings. The specific process parameters and the like of the following examples are also only one example of suitable ranges, i.e., those skilled in the art can select the appropriate ranges through the description herein, and are not limited to the specific values exemplified below.
Example 1
In this embodiment, a home intelligent energy interconnection system includes a solar battery, a fuel cell, a lithium ion battery, a DC/AC inverter, an AC/DC rectifier, and a DC transformer; the lithium ion battery comprises a positive electrode material, wherein the positive electrode material is LiFe0.91Zn0.09PO4The particle size of the particles in the positive electrode material is 40 nm; wherein Zn is used as a doping substance of Fe, and C is used as LiFe0.91Zn0.09PO4The coating substance of (1); and, coating LiFe with organic/inorganic composite carbon source0.91Zn0.09PO4；
The organic/inorganic composite carbon source is a sucrose/graphene composite carbon source;
the above-mentioned LiFe0.91Zn0.09PO4In the/C composite positive electrode material, the carbon content is 11.6 percent; the mass ratio of sucrose to graphene in the sucrose/graphene composite carbon source is 2: 5.
The preparation method of the composite cathode material comprises the following steps:
step 1, adding 0.091mol of Fe (NO)3)3·9H2O, 0.1mol of (NH)4)2HPO4And the mixture of sucrose and graphene are dissolved in 50ml of deionized water to form a precursor solution I; 0.009mol of Zn (NO) was weighed out3)2·6H2Adding the O into the precursor solution I, stirring, and completely dissolving to obtain a precursor solution II; weighing 0.1mol of LiOH. H2Dissolving O in 25ml of deionized water to form a precursor solution III;
step 2, adding the precursor solution III obtained in the step into a precursor solution II under vigorous stirring to obtain precursor gel, and then dropwise adding concentrated ammonia water into the precursor gel to adjust the pH value to 6.3 to obtain precursor sol;
step 3, carrying out spray drying on the precursor sol by adopting a small centrifugal spray dryer to obtain precursor powder, wherein the temperatures of an inlet and an outlet of the spray dryer are 270 ℃ and 95 ℃ respectively, and the spray drying speed is 20 ml/min;
step 4, in N2Under protection, calcining the obtained precursor powder in a tubular furnace at 460 ℃ for 3h, 640 ℃ for 30min and 760 ℃ for 8h to obtain LiFe0.91Zn0.09PO4the/C composite cathode material.
And mixing and size mixing the composite positive electrode material with a binder, a conductive agent and the like, and coating the mixture on an aluminum foil current collector to obtain a positive plate, thereby obtaining the lithium ion battery. The conductivity of the anode material exceeds 10-2S/cm, and the charge and discharge capacities at 0.2C, 1.0C, 2.0C, 5.0C and 10.0C are respectively 165.8mAh/g, 136.1mAh/g, 129.4mAh/g, 122.5mAh/g and 117.9mAh/g,
under the discharge rate of 2.0C, after 300 charging cycles, the capacity fading is 3.3 percent, the cycle performance is good,
no explosion and deformation and stable structure.
Example 2
In this embodiment, a home intelligent energy interconnection system includes a solar battery, a fuel cell, a lithium ion battery, a DC/AC inverter, an AC/DC rectifier, and a DC transformer; the lithium ion battery comprises a positive electrode material, wherein the positive electrode material is LiFe0.95Zn0.05PO4The particle size of the particles in the positive electrode material is 40 nm; wherein Zn is used as a doping substance of Fe, and C is used as LiFe0.95Zn0.05PO4A coating material of/C; and, coating LiFe with organic/inorganic composite carbon source0.95Zn0.05PO4/C；
The organic/inorganic composite carbon source is a sucrose/graphene composite carbon source;
the above-mentioned LiFe0.95Zn0.05PO4In the/C composite positive electrode material, the carbon content is 11.6 percent; the mass ratio of sucrose to graphene in the sucrose/graphene composite carbon source is 2: 5.
The preparation method of the composite cathode material comprises the following steps:
step 1, adding 0.095mol of Fe (NO)3)3·9H2O, 0.1mol of (NH)4)2HPO4And the mixture of sucrose and graphene are dissolved in 50ml of deionized water to form a precursor solution I; 0.005mol of Zn (NO) was weighed3)2·6H2Adding the O into the precursor solution I, stirring, and completely dissolving to obtain a precursor solution II; weighing 0.1mol of LiOH. H2Dissolving O in 25ml of deionized water to form a precursor solution III;
step 2, adding the precursor solution III obtained in the step into a precursor solution II under vigorous stirring to obtain precursor gel, and then dropwise adding concentrated ammonia water into the precursor gel to adjust the pH value to 6.3 to obtain precursor sol;
step 3, carrying out spray drying on the precursor sol by adopting a small centrifugal spray dryer to obtain precursor powder, wherein the temperatures of an inlet and an outlet of the spray dryer are 270 ℃ and 95 ℃ respectively, and the spray drying speed is 20 ml/min;
step 4, in N2Under protection, calcining the obtained precursor powder in a tubular furnace at 460 ℃ for 3h, 640 ℃ for 30min and 760 ℃ for 8h to obtain LiFe0.95Zn0.05PO4the/C composite cathode material.
And mixing and size mixing the composite positive electrode material with a binder, a conductive agent and the like, and coating the mixture on an aluminum foil current collector to obtain a positive plate, thereby obtaining the lithium ion battery. The conductivity of the anode material exceeds 10-2S/cm, the charge and discharge capacities of the material at 0.2C, 1.0C, 2.0C, 5.0C and 10.0C are 164.7mAh/g, 131.9mAh/g, 125.4mAh/g, 118.5mAh/g and 90.4mAh/g respectively, and the capacity attenuation is 5.4 percent after 300 charge cycles at 2.0C discharge rate, so that the material has the advantages of good cycle performance, no explosion, no deformation and stable structure.
Example 3
In this embodiment, a home intelligent energy interconnection system includes a solar battery, a fuel cell, a lithium ion battery, a DC/AC inverter, an AC/DC rectifier, and a DC transformer; the lithium ion battery comprises a positive electrode material, wherein the positive electrode material is LiFe0.85Zn0.15PO4Compounding a positive electrode material, wherein the particle size of particles in the positive electrode material is 40 nm; wherein Zn is used as a doping substance of Fe, and C is used as LiFe0.85Zn0.15PO4The coating substance of (1); and, coating LiFe with organic/inorganic composite carbon source0.85Zn0.15PO4；
The organic/inorganic composite carbon source is a sucrose/graphene composite carbon source;
the above-mentioned LiFe0.85Zn0.15PO4In the composite anode material, the carbon content is 11.6%; sucrose and stone in the sucrose/graphene composite carbon sourceThe mass ratio of the graphene is 2: 5.
The preparation method of the composite cathode material comprises the following steps:
step 1, 0.085mol of Fe (NO)3)3·9H2O, 0.1mol of (NH)4)2HPO4And the mixture of sucrose and graphene are dissolved in 50ml of deionized water to form a precursor solution I; 0.015mol of Zn (NO) is weighed out3)2·6H2Adding the O into the precursor solution I, stirring, and completely dissolving to obtain a precursor solution II; weighing 0.1mol of LiOH. H2Dissolving O in 25ml of deionized water to form a precursor solution III;
step 2, adding the precursor solution III obtained in the step into a precursor solution II under vigorous stirring to obtain precursor gel, and then dropwise adding concentrated ammonia water into the precursor gel to adjust the pH value to 6.3 to obtain precursor sol;
step 3, carrying out spray drying on the precursor sol by adopting a small centrifugal spray dryer to obtain precursor powder, wherein the temperatures of an inlet and an outlet of the spray dryer are 270 ℃ and 95 ℃ respectively, and the spray drying speed is 20 ml/min;
step 4, in N2Under protection, calcining the obtained precursor powder in a tubular furnace at 460 ℃ for 3h, 640 ℃ for 30min and 760 ℃ for 8h to obtain LiFe0.85Zn0.15PO4And (3) compounding the positive electrode material.
And mixing and size mixing the composite positive electrode material with a binder, a conductive agent and the like, and coating the mixture on an aluminum foil current collector to obtain a positive plate, thereby obtaining the lithium ion battery. The conductivity of the anode material exceeds 10-2S/cm, the charge and discharge capacities of the material at 0.2C, 1.0C, 2.0C, 5.0C and 10.0C are 164.7mAh/g, 133.2mAh/g, 122.7mAh/g, 114.3mAh/g and 95.6mAh/g respectively, and the capacity attenuation is 5.8 percent after 300 charge cycles at 2.0C discharge rate, so that the material has good cycle performance, no explosion, no deformation and stable structure.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is to be construed in all aspects and as broadly as possible, and all changes, equivalents and modifications that fall within the true spirit and scope of the invention are therefore intended to be embraced therein.
Claims (8)
1. The utility model provides a family's intelligent energy interconnection system which characterized in that: the system comprises a solar battery, a fuel battery, a lithium ion battery, a DC/AC inverter, an AC/DC rectifier and a direct current transformer;
the solar cell is used for directly converting light energy into electric energy through a photoelectric effect or a photochemical effect; the fuel cell is a hydrogen-oxygen fuel cell and is used for carrying out hydrogen-oxygen electrochemical reaction and converting the chemical energy of hydrogen into electric energy; the lithium ion battery is used for storing electric energy and directly supplying power to household appliances; the DC/AC inverter is used for inverting the direct current of the lithium ion battery into alternating current to feed back to a mains supply power grid, so that the waste of electric energy is avoided; the AC/DC rectifier is used for converting alternating current of a mains supply grid into direct current for household appliances; the direct current transformer is used for reducing the voltage of the 220V direct current to the voltage required by the household appliance; the lithium ion battery is respectively connected with the input end of the direct current transformer and the input end of the DC/AC inverter, and the output end of the DC/AC inverter is connected with the commercial power grid; the commercial power grid is connected with the input end of the AC/DC rectifier, and the output end of the AC/DC rectifier is connected with the household appliance; the output end of the direct current transformer is connected with a household appliance; a solar cell and a fuel cell are connected between the lithium ion battery and the input end of the direct current transformer;
the lithium ion battery comprises a positive electrode material, and the positive electrode material is LiFe0.91Zn0.09PO4a/C composite positive electrode material; wherein Zn is used as a doping substance of Fe, and C is used as LiFe0.91Zn0.09PO4The coating substance of (1); and, coating LiFe with organic/inorganic composite carbon source0.91Zn0.09PO4。
2. The system according to claim 1, wherein the solar battery, the fuel battery and the lithium ion battery are all connected to a controller, and the controller is configured to monitor real-time status of the fuel battery, the solar battery and the lithium ion battery, and control power distribution and mutual transmission.
3. The system of claim 1, wherein the output of the AC/DC rectifier is connected to the lithium ion battery, and the lithium ion battery is charged by the utility grid through the AC/DC rectifier in case of overcast weather or insufficient supply of hydrogen fuel.
4. The system of claim 1, wherein the solar cell is connected to the radiator via an electronic thermostat.
5. The system as claimed in claim 1, wherein the particle size of the composite positive electrode material is 40 nm.
6. The system of claim 5, wherein the organic/inorganic composite carbon source is a sucrose/graphene composite carbon source, and the mass ratio of sucrose to graphene in the sucrose/graphene composite carbon source is 2: 5.
7. The system of claim 6, wherein said LiFe is selected from the group consisting of0.91Zn0.09PO4The carbon content in the composite positive electrode material was 11.6%.
8. The system of claim 7, wherein the composite anode material is prepared by the steps of:
step 1, adding 0.091mol of Fe (NO)3)3·9H2O, 0.1mol of (NH)4)2HPO4And the mixture of sucrose and graphene are dissolved in 50ml of deionized water to form a precursor solution I; 0.009mol of Zn (NO) was weighed out3)2·6H2Adding the O into the precursor solution I, stirring, and completely dissolving to obtain a precursor solution II; weighing 0.1mol of LiOH. H2Dissolving O in 25ml of deionized water to form a precursor solution III;
step 2, adding the precursor solution III obtained in the step into a precursor solution II under vigorous stirring to obtain precursor gel, and then dropwise adding concentrated ammonia water into the precursor gel to adjust the pH value to 6.3 to obtain precursor sol;
step 3, carrying out spray drying on the precursor sol by adopting a small centrifugal spray dryer to obtain precursor powder, wherein the temperatures of an inlet and an outlet of the spray dryer are 270 ℃ and 95 ℃ respectively, and the spray drying speed is 20 ml/min;
step 4, in N2Under protection, calcining the obtained precursor powder in a tubular furnace at 460 ℃ for 3h, 640 ℃ for 30min and 760 ℃ for 8h to obtain LiFe0.91Zn0.09PO4the/C composite cathode material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810542344.3A CN108777511A (en) | 2018-05-30 | 2018-05-30 | A kind of Intelligent household type energy interacted system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810542344.3A CN108777511A (en) | 2018-05-30 | 2018-05-30 | A kind of Intelligent household type energy interacted system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108777511A true CN108777511A (en) | 2018-11-09 |
Family
ID=64028074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810542344.3A Withdrawn CN108777511A (en) | 2018-05-30 | 2018-05-30 | A kind of Intelligent household type energy interacted system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108777511A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208627A (en) * | 2011-05-11 | 2011-10-05 | 华南理工大学 | Method for preparing LiFePO4/C composite anode material by spray drying |
| CN107634201A (en) * | 2017-09-08 | 2018-01-26 | 绵阳梨坪科技有限公司 | One kind is suitable to industrialized water system lithium ion battery material preparation method |
| CN207320831U (en) * | 2018-01-31 | 2018-05-04 | 安徽明天氢能科技股份有限公司 | A kind of Intelligent household type energy interacted system |
-
2018
- 2018-05-30 CN CN201810542344.3A patent/CN108777511A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208627A (en) * | 2011-05-11 | 2011-10-05 | 华南理工大学 | Method for preparing LiFePO4/C composite anode material by spray drying |
| CN107634201A (en) * | 2017-09-08 | 2018-01-26 | 绵阳梨坪科技有限公司 | One kind is suitable to industrialized water system lithium ion battery material preparation method |
| CN207320831U (en) * | 2018-01-31 | 2018-05-04 | 安徽明天氢能科技股份有限公司 | A kind of Intelligent household type energy interacted system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110061229B (en) | High-power-density long-cycle-life sodium ion battery positive electrode material and preparation method and application thereof | |
| CN107331851B (en) | Sodium-ion battery nano-chip arrays nickel phosphide/3D graphene composite material and preparation method thereof | |
| CN106654221A (en) | Three-dimensional porous carbon-coated zinc selenide material for lithium ion battery anodes and preparation method of material | |
| CN110155983B (en) | Preparation method of cotton-based porous biomass carbon | |
| CN103227324A (en) | Preparation method of iron oxide cathode material for lithium ion battery | |
| WO2024011862A1 (en) | Iron-based sodium ion full battery and preparation method therefor | |
| CN110323073B (en) | Preparation method and application of oxygen-doped cobalt nickel phosphide-reduced graphene oxide composite material | |
| CN108418202B (en) | Renewable energy-based circulating power generation system | |
| CN104852028A (en) | Lithium titanate/graphene composite cathode material for lithium ion battery | |
| CN110304614A (en) | A kind of transition metal phosphide Fe2P negative electrode material | |
| CN105206832B (en) | A kind of sintering preparation method of zinc load material | |
| CN115074751B (en) | High-temperature electrolytic hydrogen production system and method capable of continuously and stably operating and application thereof | |
| CN110148730A (en) | High-first-efficiency long-life silicon-based negative electrode material and preparation method and application thereof | |
| CN110265652A (en) | A kind of preparation method for lithium ion/sodium-ion battery cathode nano-sheet Sb/C composite material | |
| CN106816590A (en) | A kind of preparation method of high-capacity lithium ion cell composite negative pole material | |
| CN109309191A (en) | A kind of novel long-life energy storage lithium ion battery pole piece and lithium ion battery | |
| CN113078299A (en) | Sodium-lithium-iron-manganese-based layered oxide material, preparation method and application | |
| CN111268727B (en) | Calcium vanadate composite material and preparation method and application thereof | |
| CN109950640B (en) | Metal graphite medium-temperature energy storage battery and preparation method thereof | |
| CN207320831U (en) | A kind of Intelligent household type energy interacted system | |
| CN108281620B (en) | Preparation method of negative electrode material titanium dioxide of sodium-ion battery | |
| CN106531966B (en) | Nanometer and its is applied Cu@CuO material preparation method in lithium ion battery | |
| CN111540616B (en) | Light enhancement effect transparent super capacitor and preparation method thereof | |
| CN113054185A (en) | Positive and negative dual-purpose sodium ion battery material without phase change and preparation method and application thereof | |
| CN111682288A (en) | Preparation method of lead-acid flow battery with long cycle life |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181109 |