93results about How to "Avoid capacity loss" patented technology

The invention discloses a self-supporting flexible carbon nano-tube paper composite electrode material for a lithium ion battery. A carbon nano-tube paper network of the material is formed by using interlaced carbon nano-tubes, and active anode material particles or cathode material particles of the lithium ion battery are compounded with carbon nano-tube paper to form the carbon nano-tube paper composite electrode material. In the electrode material, the carbon nano-tubes form an efficient three-dimensional conductive network, so that a better electron channel is provided for active material particles with low electrical conductivity. Because a bonding agent and a current collector are not needed, the electrode material has a higher active material ratio, and the performance of the electrode material is further improved. Meanwhile, the high mechanical property of the carbon nano-tube paper makes the composite electrode material show flexible characteristics, and as a flexible electrode material, the self-supporting flexible carbon nano-tube paper composite electrode material is hopeful to be widely used in next-generation flexible electronic equipment.

This invention relates to an automatic control method for green waves of roadway signal lamps automatically controlled by computers, which can increase the usage efficiency of motor roadways and crosswalk: 1, increasing safety for foot passengers and reducing conflict between motor cars and passengers, 2, reducing interference of foot passengers to cars to ensure stability of motor flows, 3, much more benefit to the region control to city road traffic to realize green wave control to motor cars among city road crossings.

The invention discloses non-aqueous electrolyte for a lithium manganate power battery. The non-aqueous electrolyte comprises 70-90% of carbonic ester compound, 3-20% of various functional additives and 11-17% of lithium hexafluorophate, wherein the carbonic ester compound is one of or mixture of ethylene carbonate (EC), propylene carbonate (PC), butane carbonate (BC), dimethyl carbonate (DMC), diethyl carbonate (DEC), dipropyl carbonate (DPC), methyl ethyl carbonate (EMC), methyl propyl carbonate (MPC) and methyl butyl carbonate (BMC); and the additives comprise 0.5-10% of a film forming additive, 0.5-10% of a high-temperature additive, 0.5-10% of an anti-overcharge additive, 0.5-10% of a flame retardant additive and 0.001-2% of a stability additive. In the non-aqueous electrolyte for the lithium manganate power battery of the invention, the performance of a solid phase interfacial film in the battery is improved, the compatibility of the electrolyte with negative electrode material is enhanced, and the cycle performance as well as the safety performance of the battery is greatly improved.

The invention relates to a nanometer fusion lamination modified lithium ion battery positive electrode material and a preparation method thereof. The nanometer fusion lamination modified lithium ion battery positive electrode material consists of a positive electrode active material base body and a nanometer oxide and Li2TiO2 compound layer wrapping the surface of the base body. The preparation method comprises the following steps: (1) dissolving a titanium source in absolute ethyl alcohol, adding an inhibiting agent to obtain a colloidal solution; (2) adding a template agent in the colloidal solution, then adding lithium acetate to obtain a wrapping solution; (3) slowly adding a nanometer oxide and a positive electrode material in the wrapping solution, heating and mixing to obtain sol; and (4) drying the sol to obtain a wrapping precursor; and (5) grinding the wrapping precursor and then keeping the ground wrapping precursor at the temperature of 500-600 DEG C for 5-8h to obtain the nanometer fusion lamination modified lithium ion battery positive electrode material. According to the nanometer fusion lamination modified lithium ion battery positive electrode material modified in accordance with the method provided by the invention, the stability and the safety of the nanometer fusion lamination modified lithium ion battery positive electrode material can be effectively improved, and the ion conductance and the electronic conductance of the surface of the positive electrode material are improved.

Air conditioner for conditioning a space inside a building includes a heat source unit and at least one indoor unit. The heat source unit has a heat exchanger unit and a compressor unit. The heat exchanger unit includes a first heat exchanger disposed in a first casing and configured to exchange heat with a heat source. The compressor unit includes a compressor disposed in a second casing separate from the first casing, the heat exchanger unit and the compressor unit being fluidly connected via a first liquid refrigerant pipe and a first gaseous refrigerant pipe. At least one indoor unit has a second heat exchanger configured to exchange heat with the space to be conditioned and being fluidly communicated to the heat exchanger unit and/or the compressor unit via a second liquid refrigerant pipe and a second gaseous refrigerant pipe. The outer diameter of the first liquid refrigerant pipe is larger than the outer diameter of the second liquid refrigerant pipe and/or the outer diameter of the first gaseous refrigerant pipe is larger than the outer diameter of the second gaseous refrigerant pipe.

The invention discloses a quaternary lithium-ion battery positive electrode material and a preparation method thereof. A molecular formula of the quaternary lithium-ion battery positive electrode material is LiNi0.8Co0.15Al0.03Mn0.02O2, a 0.2 C discharge capacity at a room temperature of 180-185mAh/g; and weight ratio energy is 650-661 Wh/Kg. The LiNi0.8Co0.15Al0.03Mn0.02O2 prepared by the method has a uniform sphere structure, and at the same time, due to the effect of a template, the prepared quaternary lithium-ion battery positive electrode material is beneficial to store electrolyte and overcome capacity loss caused by incomplete reaction of materials at core part. The quaternary lithium-ion battery positive electrode material greatly increases storage energy of the material, can prepare lithium ion power battery with light weight and high capacity, and can be widely applied in situations of electrical vehicles, electric bicycles, electric tools, etc.

The invention discloses a method for analyzing and processing the capacity drop of a lithium cell energy storing system. The method comprises the steps of recording voltage value, temperature value and capacity value of a running cell unit of the lithium cell energy storing system; storing the voltage value, temperature value and capacity value to a database; extracting the voltage value, temperature value and capacity value of each cell unit with the preset number in the same charging cycle and the same discharging cycle; generating a historical voltage curved line, a historical temperature curved line and a historical capacity curved line of each cell unit; comparing the historical voltage curved line, the historical temperature curved line or the historical capacity curved line of different cell units in the same charging cycle or the same discharging cycle; determining the cell unit which leads to system capacity drop. The invention further discloses an analyzing processing device. According to the method, the cell unit which leads to system capacity drop is determined according to the historical voltage curved line, the historical temperature curved line or the historical capacity curved line, and the technical effect of quickly positioning the cell unit to be replaced can be reached.

The invention discloses a novel high-voltage lithium cobalt oxide material and a preparation method thereof, and belongs to the field of positive electrode materials of lithium-ion batteries. The material comprises a core-shell structure, an inner core is made of lithium cobalt oxide particles doped with nickel and manganese in a gradient manner, and a shell is an in-situ produced spinel LiNi0.5Mn1.5O4 wrapping layer doped with rare earth. The invention also relates to a preparation method of the material, the lithium cobalt oxide material with gradient doping of the inner core and surface in-situ wrapping can be obtained by once sintering, the process is simple, the operation process is controllable, and the prepared lithium cobalt oxide material has better structural stability, higher discharging capacity and excellent circulation performance in a high voltage.

The invention discloses a supercapacitor three-stage charging circuit comprising a Buck converter circuit, a current sampling circuit, a charging mode control circuit and a charging driving circuit. A supercapacitor is connected with the output end of the Buck converter circuit. The current sampling circuit is connected with the Buck converter circuit. The charging mode control circuit is connected with the output end of the current sampling circuit, the supercapacitor and the reference voltage output end of the charging driving circuit. The charging driving circuit is connected with the output end of the charging mode control circuit and the output end of the current sampling circuit. The Buck converter circuit is connected with the PWM signal output end of the charging driving circuit. The invention also discloses a supercapacitor quick charging method of the supercapacitor three-stage charging circuit. The supercapacitor three-stage charging circuit is convenient to implement and low in cost so that charging speed of the supercapacitor can be enhanced, working stability and reliability are high, the charging and discharging performance of the supercapacitor can be effectively protected and practicality is high.

A lithium secondary battery that is excellent in resistance to short-circuits and heat, is unlikely to suffer a capacity loss due to impact such as dropping, and has a high capacity. The lithium secondary battery includes: an electrode assembly including a strip-like positive electrode and a strip-like negative electrode that are wound together with a porous heat-resistant layer interposed therebetween; a non-aqueous electrolyte; and a battery can. The battery has a restricting part for restricting vertical movement of the electrode assembly. The distance A from the restricting part to the inner bottom face of the battery can and the width B of the negative electrode satisfy the relation: 0.965<=B/A<=0.995.

A grid plate for a lead acid storage battery comprising a frame section having a pair of quadrangular contour shape, and longitudinal grid strands and lateral grid strands that form a grid inside the frame section. The longitudinal grid strands and lateral grid strands are composed of thick strands of smaller thickness than the frame section, and thin strands of smaller width and thickness than the thick strands. The thick strands and thin strands are arranged so that the strands adjacent to the thick strands are thin strands, and space is reliably provided for facilitating the flow of active material to the sides of the thick strands. The two ends of the thick strands in the thickness direction are positioned further inward from the two end faces of the frame section in the thickness direction, and the end portions of one end side of the thin strands in the thickness direction are positioned in positions offset to one end side of the thick strands in the thickness direction, whereby the active material is readily packed into the reverse surface side of the grid plate.

The invention relates to a lithium-supplementing porous silicon monoxide negative electrode material for lithium ion batteries and a preparation method thereof, and belongs to the technical field of preparation of lithium ion battery materials. The lithium-supplementing porous silicon monoxide negative electrode material is characterized in that the lithium-supplementing porous silicon monoxide negative electrode material is of a core-shell structure, porous silicon monoxide serves as an inner core, a nitrogen-doped carbon material serves as a shell, and the thickness of the shell is 50-500 nm. The lithium-supplementing porous silicon monoxide negative electrode material has the advantages that a carbon layer is uniformly deposited on the surface of the porous silicon monoxide, so that theporous silicon monoxide is prevented from directly contacting with the electrolyte, the occurrence probability of side reactions is reduced, and the electric conductivity is improved; meanwhile, by adopting the nitrogen-doped carbon material, the electric conductivity of a cladding layer can be further improved, and accordingly, the rate performance in lithium-supplementing porous silicon-carboncompounding is improved.

The invention discloses a cylindrical lithium ion battery capable of automatically pre-lithiating and a preparation method thereof. The battery comprises a battery shell, a battery cap, a battery celland electrolyte, the battery cell and the electrolyte are arranged in the battery shell, the battery cell is formed by winding a positive plate, a negative plate and a diaphragm arranged between thepositive plate and the negative plate at intervals, the negative plate is connected with a negative lug, and the negative lug is connected to the bottom of the battery shell; a central hole is formedin the center of the battery cell, and metal lithium or lithium-containing alloy is added to the bottom of the battery shell through the central hole; and the metal lithium or the lithium-containing alloy is electrically communicated with the negative lug. The invention provides an external lithium source. An SEI film (a solid electrolyte interface film) can be formed on the surface of the negative electrode after liquid injection of the battery, the problem of too low initial efficiency of the negative electrode is solved, the battery capacity is improved, the negative electrode can be further embedded into the negative electrode, the negative electrode active lithium reserve is increased, and the capacity loss caused by too fast negative electrode active lithium consumption in the long-term storage or circulation process of the battery is prevented.

The invention discloses a composite micro-energy system suitable for a small load and an energy management method thereof, and belongs to the technical field of composite micro-energy management. Thecomposite micro-energy system consists of an environmental energy collection module, an energy management module and an energy storage module connected in series, and the energy management module is connected with a small load. The energy management method of the composite micro-energy system is that the energy management module collects the power consumption information of the small load, the power generation state of the energy collection module and the power storage state information of the energy storage module. As such, the information energy management module decides to charge or discharge the energy storage module, rationally distributes the charge and discharge power of the supercapacitor and the lithium battery in the energy storage module, and gives full play to the respective advantages of the energy storage of the lithium battery and the energy storage of the supercapacitor, thereby improving the reliability of the system, ensuring that sufficient energy is supplied to thesmall load, and ensuring the stable operation. The method is simple and effective, and prolongs the life of the system.

The invention discloses a super capacitor multi-mode quick charge circuit design method, which comprises the following steps: 1) selecting resistance of a resistor RS; 2) enabling one end of the resistor RS to be connected with the cathode output end of a Buck convertor circuit, and enabling the other end of the resistor RS to be grounded; 3) selecting elements having appropriate parameters and forming a charging mode control circuit; 4) connecting the elements to form the charging mode control circuit; 5) selecting elements having appropriate parameters and forming a charging drive circuit; 6) connecting the elements to form the charging drive circuit; and 7) connecting the Buck convertor circuit, a voltage source, a super capacitor and the charging drive circuit to form a super capacitor multi-mode quick charge circuit. The method is simple in steps, reasonable in design, convenient to realize, high in practicality and convenient for popularization use.

The invention discloses a battery insulation system which comprises a battery case, a heating device, a monitoring device and a load, wherein at least one battery is arranged in the battery case, and the heating device is used for heating the battery in the battery case; and the monitoring device is connected with the battery and is used for monitoring and controlling the battery and solar energy, and the load is connected with the monitoring device and is used for supplying power to the heating device. By the battery insulation system, the temperature of the battery can be controlled at a reasonable level, so that the capacity decline problem of the battery due to too low temperature can be solved, and the remaining power of the load can be effectively utilized so as to avoid waste.

The method includes steps: mixing lithium acetate and cobalt acetate according to 0.25-4:1 mol ratio, and solving the admixture to carbitol to form solution of precursor body in density of metal positive ion as 0.001-0.02 mol/liter; solution flowed to spray head in 2-4 ml./hr uniform speed, adjusting interval between spray head and substrate as 1-4 cm, controlling constant temperature 200-300 deg.C for substrate, adjusting DC voltage between spray head and substrate to obtain steady and even spray; obtaining XLi2O .YcoO film of composite oxides in thickness 1-200 micro; film is in 3D mesh structure, and mesh size as 2-30 micro, Li2O and CoO as amorphous phase and crystallite state respectively; 2 theta of characteristic peak of X ray for incidence to copper target as 36, 42.5, 61.5, 74 degrees, and relative intensity ratio of peak as 1:1-1.7 for 2 theta being as 42.5 and 36 degrees. Features are: high first discharge capacity, low first capacity loss and excellent cycle performance.

The invention discloses a method for preparing a lithium ion battery cathode material wrapped and modified by a Li-lacked material. The method includes the following steps that NiaCobMnc(OH)2, a lithium source and a compound of an M element are mixed evenly according to the proportion and then sintered under the condition of 700 DEG C or above, and a cathode active substance matrix is prepared; a cobalt-containing compound and the lithium source are evenly mixed according to the proportion and then sintered under the condition of 700 DEG C or above, and the Li-lacked active material is prepared; the prepared Li-lacked active material and the cathode active substance matrix are evenly mixed and sintered under the condition of 600 DEG C or above, and the lithium ion battery cathode material wrapped and modified by the Li-lacked material is obtained. The preparation method is simple, and the prepared product is low in lithium-nickel mixed typeset degree, stable in layered structure and excellent in electrical property.

The invention discloses a nickel-based rechargeable battery and a manufacturing method thereof. The nickel-based rechargeable battery comprises an anode, a cathode and an electrolyte, wherein an active material of the cathode includes nickel; an active material of the anode includes a carbon and manganese dioxide composite material; the carbon and manganese dioxide composite material is a material with manganese dioxide attached on the surface of a nano carbon material carrier or a mixed material of a nano carbon material and manganese dioxide; and the electrolyte contains a bivalent nickel ion Ni<2+> and a bivalent manganese ion Mn<2+>. The manufacturing method comprises the steps of manufacturing the anode taking the carbon and manganese dioxide composite material as the active material, manufacturing the cathode taking the nickel as the active material, preparing the electrolyte containing the bivalent nickel ion Ni<2+> and the bivalent manganese ion Mn<2+>, and finally packaging the anode, the cathode and the electrolyte to obtain the nickel-based rechargeable battery. The obtained battery has the characteristics of high capacity and long cycle life.

A system and a method for caching a high-performance instruction are applied to the field of processors, which can fill, before a processor core executes an instruction, the instruction in a high-speed memory that can be directly accessed by the processor core, so that the processor core can acquire a needed instruction from the high-speed memory almost each time, thereby achieving a high cache hit rate.

The invention relates to a three-way hemispherical valve based on normal operation and online pressure maintenance of a pipeline. The valve comprises a valve body and a hemispherical valve core; threechannels are formed in the valve body and include a fluid entering channel, a fluid flowing-out channel and an online maintenance channel; an opening and closing sealing pair matched with the hemispherical valve core for sealing is arranged in the fluid flowing-out channel; a maintenance sealing pair matched with the hemispherical valve core for sealing is arranged in the online maintenance channel; a maintenance sealing gland is mounted on the outer end surface of the online maintenance channel; a pressure relief component and a pressure gauge which communicate with the online maintenance channel are arranged on the online maintenance channel; the hemispherical valve core is located in a valve cavity of the valve body; and a hemispherical valve core rotating shaft is mounted on the valvebody and is connected with an external driving device. The invention further relates to an online pressure maintenance method on the basis of the hemispherical valve. According to the valve and the method, normal operation and online maintenance operation of the pipeline can be realized, the problem that normal operation and online maintenance of the pipeline cannot be realized by the aid of hemispherical valves or other valves in the market at present is solved, the maintenance cost is reduced, the maintenance operation time is shortened, and the labor intensity is reduced.

For the analysis of scratches on semiconductor wafers, the semiconductor wafer surface is detected and a possible scratch position or a scratch course on the semiconductor surface is determined, in which case a parameter value identifying the scratch is determined from the scratch position and the scratch course and this parameter value that has been determined is correlated with comparison parameter values, which identify installation-specific scratch positions and scratch courses, in order to determine an installation causing the scratch.

The invention belongs to the technical field of a battery, and particularly relates to a hard carbon negative electrode material. The hard carbon negative electrode material comprises a hard carbon sphere matrix, wherein oxide layers are coated at a surface functional group position and a surface defect position on the hard carbon sphere matrix. The invention also provides a preparation method ofthe hard carbon negative electrode material. The oxide layers are coated at the surface functional group position and the surface defect position on the hard carbon sphere matrix by employing an atomic layer deposition method. The invention also provides a negative pole plate. The negative pole plate comprises a negative electrode current collector, wherein a hard carbon negative material layer iscoated on a surface of the negative electrode current collector and comprises the hard carbon negative electrode material. The invention also provides the battery. The battery comprises a positive pole plate and also comprises the negative pole plate. In the hard carbon negative electrode material, the oxide layers are coated at the surface functional group position and the surface defect position of the hard carbon sphere matrix, the surface defect of hard carbon and the functional group is in contact with an organic electrolyte to generate side reaction can be prevented, and the performanceof the battery is improved.

The invention discloses a solar energy collection composite micro-energy system and a method for realizing super capacitor charging control, and belongs to the technical field of new energy compounding. The composite micro-energy system is composed of a solar battery, a solar energy collection circuit, a battery protection circuit, a lithium battery, a super capacitor charger, a super capacitor, an output adjusting circuit and a controller. The solar battery, the solar energy collection circuit, the battery protection circuit, the lithium battery and the controller are connected in series to form a loop, and the super capacitor charger is connected with the solar energy collection circuit, the controller and the super capacitor to form the solar collection composite micro-energy system; the super capacitor of the system supplies power to the wireless sensing node through the output adjusting circuit. According to the system, the lithium battery and the super capacitor are adopted for composite energy storage, and large energy storage capacity and high power output can be achieved at the same time, and energy can be provided for the wireless sensing node for a long time. Different load conditions can be adapted, so that the capacity of the lithium battery is slowly attenuated, and the service life is long.