111643results about "Secondary cells" patented technology

The invention relates to a method for preparing a lithium iron phosphate / carbon composite material of a lithium ion battery, which belongs to the technical field of lithium ion batteries. The method for preparing the lithium iron phosphate / carbon composite material of the lithium ion battery comprises the following steps of: 1) preparing a suspending graphene-dispersed aqueous solution system, namely, crushing graphite to 1 to 5 microns, adding the crushed graphite into distilled water or purified water, adding 0.1 to 5 percent of surfactant, heating with stirring the mixed solution to 180 to 250 DEG C in a sealing way, performing stirring for 2 to 6 hours and reducing the temperature; 2) crushing lithium iron phosphate to the particle size of 1 to 5 microns, adding the crushed lithium iron phosphate into the distilled water or the purified water, adding with stirring 0.01 to 1 percent of coupling agent, performing uniform stirring, adding the graphene-dispersed aqueous solution, and performing stirring and filtration; and 3) vacuum-drying solid powder obtained by the filtration, and calcinating the dried solid powder for 2 to 12 hours to obtain the graphene-coated lithium iron phosphate cathode material. The method has the advantages of simple process, high material performance, high conductivity, high bulk density, high compacted density and the like.

The invention discloses a battery monomer, a battery device and a power utilization device. Each battery monomer comprises a positive pole piece, a negative pole piece, electrolyte and an isolating membrane arranged between the positive pole piece and the negative pole piece; the electrolyte comprises a solvent and an electrolyte salt, the electrolyte salt comprises lithium bis (fluorosulfonyl) imide, and based on the total mass of the electrolyte, the mass content of the lithium bis (fluorosulfonyl) imide is 1%-6%; the solvent comprises a chain carboxylic ester solvent, and the mass content of the chain carboxylic ester solvent is 5-75% based on the total mass of the electrolyte; the negative electrode plate comprises a negative electrode current collector and a negative electrode film layer arranged on at least one side of the negative electrode current collector, the negative electrode film layer comprises a negative electrode active material, and the graphitization degree of the negative electrode active material is 90-96%; the positive pole piece comprises a positive current collector and a positive film layer arranged on at least one side of the positive current collector, the positive current collector comprises aluminum foil, and the thickness of the aluminum foil is 10-16 microns.

The invention discloses a battery monomer, a battery device and a power utilization device. Each battery monomer comprises a positive pole piece, a negative pole piece and an electrolyte; the lithium ion conductivity of the electrolyte is greater than or equal to 10 mS / cm; the negative electrode plate comprises a negative electrode current collector and a negative electrode film layer arranged on at least one side of the negative electrode current collector, the negative electrode film layer comprises a negative electrode active material, the negative electrode active material comprises a core part and a coating layer at least partially coating the surface of the core part, the core part comprises graphite, and the coating layer comprises graphite. In an R value cumulative distribution curve obtained by the negative electrode active material in a surface scanning mode of a laser microscopic confocal Raman spectrometer, an R value R50 with cumulative distribution of 50% is 0.15-0.50; in the obtained R values of the negative electrode active material, the number ratio of the R values smaller than or equal to 0.11 is smaller than or equal to 15%. The battery monomer provided by the invention has good dynamic performance and long cycle life.

The invention discloses a battery monomer, a battery device and a power utilization device. Each battery monomer comprises a positive pole piece, a negative pole piece and an electrolyte; the lithium ion conductivity of the electrolyte is greater than or equal to 10 mS / cm; the negative electrode plate comprises a negative electrode current collector and a negative electrode film layer arranged on at least one side of the negative electrode current collector, the negative electrode film layer comprises a negative electrode active material, the negative electrode active material comprises a core part and a coating layer at least partially coating the surface of the core part, the core part comprises graphite, and the coating layer comprises graphite. The concentration ratio (R90-R10) / R50 of an R value is less than or equal to 2.3 in an R value cumulative distribution curve obtained by the negative electrode active material in a surface scanning mode of a laser microscopic confocal Raman spectrometer.

The invention relates to a battery monomer, a battery device and a power utilization device, the battery monomer comprises an electrode assembly and an electrolyte, and the electrode assembly comprises a positive pole piece and a negative pole piece; the positive pole piece comprises a positive pole current collecting part and a positive pole film layer; the positive pole film layer comprises lithium-containing phosphate with an olivine structure; the negative pole piece comprises a negative pole current collecting part and a negative pole film layer, and the negative pole film layer comprises a carbon-based material; the electrolyte comprises a carboxylic ester solvent, a first additive and fluorine-containing lithium sulfimide, and the mass content of the carboxylic ester solvent is 8%-60%; the total mass content of the first additive is 2.5%-10%, the first additive comprises 1, 3-propane sultone with the mass content larger than or equal to 0, an ethylene carbonate derivative with the mass content larger than or equal to 0 and vinylene carbonate with the mass content larger than 0, and the ethylene carbonate derivative comprises a compound shown in the formula A; the mass content of the fluorine-containing lithium sulfimide is 4%-8%. According to the invention, the rapid charging performance and the cycle performance of the battery monomer can be improved. # imgabs0 # formula A

A smart ring charging system comprises a charging source integrated into an object, the object configured to be held by a user wearing a smart ring. The smart ring may include a ring-shaped housing and a power source disposed within or at the ring-shaped housing and configured to receive energy from the charging source while the user is wearing the smart ring and holding the object. A controller may be disposed within or at the ring-shaped housing, or at the object with the charger and configured to estimate a charging rate at which the power source receives the energy from the charging source. The system may further include one or more indicators configured to indicate the charging rate.

A system for supplying power to a portable battery pack including a battery enclosed by a wearable and replaceable pouch or skin using at least one solar panel is disclosed, wherein the pouch or skin can be provided in different colors and / or patterns. Further, the pouch or skin can be MOLLE-compatible. The battery comprises a battery element housed between a battery cover and a back plate, wherein the battery element, battery cover, and back plate have a slight curvature or contour. Further, the battery comprises flexible leads.

A handheld fan includes a housing, a fan module, a power module, and a retractable cable module. The fan module is disposed in the housing, the power module is disposed in the housing and configured to supply power to the fan module, the retractable cable module is disposed in the housing and includes a cable retractable relative to the housing to be withdrawn into the housing or extended out of the housing, and the cable is configured to connect to an external electronic device, and supply power to the external electronic device through the power module. When a user carries the handheld fan and has a charging need, the cable is capable of being pulled out of the housing of the handheld fan, and connected to the external electronic device including a mobile phone. The power module is configured to supply power to the external electronic device.

A hard carbon negative electrode material as well as a preparation method therefor and a use thereof. The hard carbon negative electrode material comprises a hard carbon base material, heteroatoms and metal monoatoms, wherein the metal monoatoms are doped into the hard carbon base material by means of the heteroatoms, the heteroatoms comprise at least one of N, P or S, and the metal monoatoms are metal monoatoms that can undergo an alloying reaction with sodium. The metal monoatoms are doped into the hard carbon base material by means of covalent (chemical bond) interactions with other heteroatoms, so that the doping of single atoms is achieved, thereby improving the overall capacity and rate capability of a sodium ion battery at normal temperature, and ensuring the capacity retention rate of the sodium ion battery under a low temperature condition.

The invention relates to the technical field of temperature regulation and control, in particular to a liquid cooling control method and system of a battery control device, in the liquid cooling control method and system, through real-time collection and area screening of temperature and power data, accurate recognition of a high-temperature area is achieved, a clear cooling requirement partition is provided, and the cooling requirement of a battery is met. A dynamic adjustment strategy of pressure and flow parameters of the liquid cooling pump is optimized through a genetic algorithm, the cooling response speed and control precision are improved while energy consumption and cooling efficiency are effectively balanced, the pump speed and the valve opening degree are adjusted in real time, temperature changes are rapidly responded through automatic control, gradual implementation of a cooling target is ensured, and the cooling efficiency is improved. The hysteresis in the heat management process is reduced, the temperature control effect is continuously evaluated through a fuzzy control algorithm, the cooling intensity is dynamically adjusted according to the monitoring result, efficient cooling is ensured, meanwhile, equalization of temperature distribution is achieved, and a systematic heat management framework is established through long-term data monitoring and continuous optimization of cooling operation. And efficient and stable operation of temperature management is realized.

A rechargeable battery for a hair clipper includes a body having a plurality of indentations with each of the plurality of indentations being shaped to receive a fastener member of a different hair clipper. A rechargeable battery assembly for a hair clipper also includes a rechargeable battery having a body. The body having groove and a first projection in the groove with a cavity of the hair clipper that has a resilient member that extends into the cavity, and the resilient member being insertable into the groove.

The invention relates to the field of lithium battery negative electrode materials, and particularly discloses a silicon-carbon composite negative electrode material for a lithium ion battery and a preparation method of the silicon-carbon composite negative electrode material. The method comprises the following steps: preparing a porous carbon substrate, and depositing silicon nanoparticles in pores and on the surface of the porous carbon substrate by adopting a fluidized bed chemical vapor deposition process and taking silane as a silicon source to obtain a silicon-carbon core material; continuously carrying out carbon coating on the surface of the silicon-carbon core material in the fluidized bed by taking acetylene as a carbon source to form a carbon coating layer; and leading out the obtained material from the fluidized bed, taking acetylene as a carbon source, and carrying out carbon coating on the surface of the primary carbon coating layer again by adopting the rotary furnace to form a secondary carbon coating layer. According to the preparation method, a porous carbon matrix and double-layer functional carbon coating process is adopted, so that the volume expansion of silicon in the circulation process is remarkably inhibited, the interface side reaction is reduced, and the circulation stability of the material is effectively improved.

A battery containment construct is provided that includes a unitary tray having a bottom and a set of walls including a first side wall, a second side wall, a first end wall, and a second end wall. The set of walls extending from the bottom of the tray and defining a cavity within the tray. A cover removably attached to the plurality of walls of said tray opposite the bottom of said tray. Energy absorption components attached to the bottom of the tray external to at least one of the set of walls in some versions to enhance impact resistance. The construct has high strength, is light weight and well suited for containing and protecting energy cells or batteries that adjusted to impact resistance, fire resistance, and fluid penetration prevention.

The invention discloses a battery monomer, a battery device and a power utilization device. Each battery monomer comprises a positive pole piece, a negative pole piece, electrolyte and an isolating membrane arranged between the positive pole piece and the negative pole piece; the positive pole piece comprises a positive pole current collector and a positive pole film layer arranged on at least one side of the surface of the positive pole current collector, the positive pole current collector comprises a positive pole current collecting part and a positive pole lug arranged on at least one side of the side surface of the positive pole current collecting part, and the width of the positive pole current collecting part is 62-98 mm; the size of the positive electrode film layer is 63mm to 90mm along the width direction of the positive electrode current collecting part; and the lithium ion conductivity of the electrolyte is 10 mS / cm to 25 mS / cm.

A power distribution utility panel is provided with a first panel area configured to be accessed only by personnel of a utility, the first panel area including a current transformer, a second panel area including at least one remote controllable device for connecting and disconnecting power to / from one or more loads, and a third panel area including at least one power converter assembly, a controller and a power meter configured to monitor power from a power source, the at least one power converter assembly being configured to route power from the power source to an electric vehicle charger and / or an energy storage system.

An aerial drone may include a cabinet comprising a parking plate and one or more walls forming an enclosure for one or more internal components of the base station, the parking plate configured to receive the drone. The drone may include a plurality of chargers carried within the enclosure, each charger configured to provide power to a battery pack being charged at the charger. The drone may include a temperature sensor carried within the enclosure, the temperature sensor configured to measure a temperature within the enclosure. The drone may include a temperature regulator configured to regulate the temperature within the enclosure to maintain the temperature of a plurality of battery packs charged at the plurality of chargers within a temperature range.

The invention discloses an electric ship battery pack temperature control method, and relates to the technical field of ship battery pack temperature control, and the method comprises the following steps: arranging a plurality of temperature sensors in a battery pack, monitoring the temperature data of each single battery in real time, and transmitting the temperature information of each single battery to a central processing unit in real time; through multi-sensor arrangement, heat conduction model calculation and intelligent cooling system scheduling, accurate temperature monitoring and dynamic adjustment of the electric ship battery pack are realized, real-time abnormal detection is ensured, and thermal runaway is prevented. The intelligent cooling system accurately adjusts cooling force according to temperature changes, and safety accidents are avoided. Meanwhile, a cooling strategy is optimized, energy consumption is reduced, system efficiency is improved, battery life is prolonged, sailing mileage is increased, maintenance cost is reduced, and long-term stable and efficient operation of the battery pack is ensured.

A battery pack according to one or more embodiments of the present disclosure includes a plurality of battery cells; and a housing including a bottom member, a plurality of side walls, and a top member, the bottom member, the plurality of side walls, and the top member form an interior accommodation space configured to accommodate the plurality of battery cells, wherein at least one among the plurality side walls, the top member, and the bottom member are formed by a plurality of metal sheets that are roll bonded to each other, wherein at least one cooling channel is formed between bonding areas of the plurality of metal sheets, and wherein at least one crash channel is formed between bonding areas of the plurality of the metal sheets.

The invention relates to the technical field of lithium ion battery materials, in particular to a chemical liquid phase deposition silicon-carbon negative electrode material and a preparation method and application thereof.The silicon-carbon negative electrode material comprises a porous carbon skeleton and nanometer silicon particles deposited on the surface and in pore channels of the porous carbon skeleton; the carbon source coating layer is used for coating the porous carbon skeleton and the nano silicon particles. The interior of the composite structure of the silicon-carbon negative electrode material is nanometer silicon particles deposited on the surface and in pore channels of a porous carbon skeleton, and the outer layer is a coating layer; porous carbon is used as a continuous and stable carbon skeleton to effectively relieve volume expansion and particle fragmentation of the silicon-based material, and the outermost coating layer improves the structural stability and conductivity of the composite material, so that the electrochemical cycle stability is improved; according to the structure of the silicon-carbon negative electrode material, the advantages of an embedded structure and a shell-core structure are combined, a stable carbon skeleton is provided for the silicon-carbon negative electrode material, a limited expansion space is provided for silicon particles, crushing is prevented, and the cycling stability of the negative electrode material is greatly improved.

An energy storage apparatus (10) and a container (20) therefor. The container (20) comprises a box body (21) and battery cells (30). The battery cells (30) are accommodated in the box body (21). The dimension of the container (20) in the length direction and the dimension thereof in the width direction are respectively consistent with the dimensions of a standard container, and the dimension h of the container (20) in the height direction is smaller than the dimension H of one standard container in the height direction of the container (20).

The invention relates to the field of energy storage, and provides a 1.5 V lithium ion battery thermal management method based on temperature strain analysis, which comprises the following steps: monitoring the surface temperature of a battery in real time, collecting temperature strain data, extracting a key sequence value to analyze a strain trend, carrying out risk assessment to obtain a corresponding risk level and a risk index, and carrying out thermal management on a 1.5 V lithium ion battery based on the risk index. The method comprises the following steps: evaluating a battery state and performing thermal load evaluation, querying a corresponding thermal influence factor, marking a key influence area, determining a thermal management path, calculating path transfer quantity and thermal transfer efficiency, optimizing operation parameters to improve a thermal drop ratio, extracting multi-thermal energy characteristics, querying a hot spot distribution state, and analyzing hot spot labels. A thermal management scheme for the battery is generated. The thermal management level of the 1.5 V lithium ion battery can be improved.

Disclosed are a positive electrode material, a preparation method of a positive electrode material, a positive electrode plate, and a battery. The positive electrode material includes a sodium-containing oxide, an angle range of a first characteristic peak of the sodium-containing oxide is less than an angle range of a second characteristic peak, the first characteristic peak is a characteristic peak of the sodium-containing oxide at an initial voltage, the second characteristic peak is a characteristic peak of the sodium-containing oxide at a cut-off voltage, and a chemical formula of the sodium-containing oxide is LixNa1-xCo1-z MzO2. M includes a metal element or a non-metal element, 0.7<x<1, and 0.001<z<0.03.

The invention discloses a lithium iron phosphate positive electrode material, a preparation method thereof and a lithium battery, and relates to the technical field of lithium ion batteries. According to the method, the pressing index of the lithium iron phosphate positive electrode material is tested by adopting a specific method, so that the pressing index meets a specific range, meanwhile, the average circularity of larger particles in a Dv50-Dv100 range meets a proper range, the lithium iron phosphate positive electrode material has better particle movement capability, and the particles can move at a higher speed to be rearranged during pressing, so that the particle size of the lithium iron phosphate positive electrode material is reduced, and the quality of the lithium iron phosphate positive electrode material is improved. Therefore, the positive pole piece with high compaction density can be obtained, the charge-discharge capacity of the battery can be improved, and meanwhile, the particles can be prevented from being broken when being pressed, so that the positive pole piece has good anti-pressure capability. By adopting the lithium iron phosphate positive electrode material provided by the invention, the lithium battery has relatively high energy density and capacity retention ratio.

A vehicle includes a chassis including a frame rail extending longitudinally, a tractive element coupled to the chassis, a cab coupled to the chassis and configured to support an operator, an electric motor configured to drive the tractive element to propel the vehicle, a battery configured to supply electrical energy to the electric motor, a heat exchanger, a cable electrically coupling the electric motor and the battery, and a conduit fluidly coupling the battery and the heat exchanger. The cable and the conduit extend laterally from the battery to the frame rail, and the cable and the conduit extend longitudinally along the frame rail.

The invention relates to the technical field of BMS control, and discloses a power battery BMS control temperature equalization method and device, and the method comprises the steps: carrying out the collection and thermodynamic characteristic analysis of the temperature data and heat loss power of N single batteries in a power battery pack, and obtaining the dynamic characteristic parameters of the temperature of the battery pack and a temperature field distribution prediction track; performing estimation compensation on thermal coupling interference and temperature measurement noise among the battery monomers to obtain actual temperature data of each battery monomer; performing battery pack temperature mean value calculation on the actual temperature data of each battery monomer, generating a temperature equalization target track, and performing multi-target optimization solution to obtain a temperature equalization control quantity of each battery monomer; and calculating the target heat dissipation power of each battery monomer, and outputting a regulation and control instruction of a radiator of each battery monomer. According to the invention, through real-time adjustment of the heat dissipation power correction coefficient, reasonable distribution of heat dissipation resources is realized, and the heat dissipation efficiency and the temperature equalization effect are improved.

A box structure includes a cooling member and a frame. The cooling member includes a main pipe and at least one branch pipe connected to the main pipe. The main pipe is configured to pass a coolant into the branch pipe, and the branch pipe is configured to contact the battery pack to cool the battery pack. An accommodation groove is created at a bottom of the frame, at least a part of the main pipe is located in the accommodation groove, and the main pipe is bonded and fixed to the accommodation groove.

The invention provides a battery monomer, a secondary battery and an electric device, and belongs to the field of batteries. The battery monomer comprises a positive electrode plate, the positive electrode plate comprises a positive electrode active material layer, the positive electrode active material layer comprises a positive electrode active material, and the volume particle size distribution Dv50 of the positive electrode active material is 0.3 [mu] m-3 [mu] m; the volume particle size distribution Dv10 is 100-800 nm, the volume particle size distribution Dv99 is less than 20 [mu] m, the positive electrode active material comprises M-doped lithium iron phosphate, M comprises Al and / or at least one transition metal element except Fe, and the mass content of M in the M-doped lithium iron phosphate is 200-1500 ppm. According to the present invention, the particle size of the positive electrode active material, the type of the doping element and the doping amount are simultaneously regulated and controlled in the above range, and the parameters are matched and co-act so as to provide the good cycle performance on the basis of the high power performance of the battery monomer.

The invention provides a photovoltaic energy storage power station battery pack temperature intelligent regulation and control and performance optimization method and system, and relates to the technical field of energy storage battery packs, and the method comprises the steps: obtaining temperature sensor array data, working state data and environment parameter data, and predicting the temperature field distribution through a deep neural network model; and constructing a temperature field topological relation graph by adopting a graph neural network, constructing a hierarchical progressive temperature control strategy based on the temperature field feature vector, generating a cooling system control instruction, and realizing temperature field intelligent optimization control of the battery pack. The method can accurately predict the temperature field distribution, improves the working efficiency and service life of the battery pack, and reduces the energy consumption.

In order to solve the problem that an existing high-voltage lithium ion battery is insufficient in high-temperature performance and safety performance, the invention provides a cyclic carbonate-sulfate compound and application thereof, a non-aqueous electrolyte and a secondary battery, and the cyclic carbonate-sulfate compound comprises a compound as shown in a chemical formula 1, the specific rotation [alpha] of the cyclic carbonate-sulfate compound ranges from-7.982 degrees mL / (dmg) to + 7.982 degrees mL / (dmg), and the specific rotation [alpha] of the cyclic carbonate-sulfate compound ranges from-7.982 degrees mL / (dmg) to + 7.982 degrees mL / (dmg); the chemical formula 1 of the # imgabs0 # is shown in the specification. When the cyclic carbonate-sulfate compound provided by the invention is used as an electrolyte additive, a formed solid electrolyte membrane is smoother and more ordered, so that the cyclic carbonate-sulfate compound has higher high-temperature stability, especially membrane layer stability under a thermal shock condition.

The invention discloses a preparation method of a high-compaction-density lithium iron phosphate material, through grading of large and small particle lithium iron phosphate, optimization of a sintering process and reasonable selection of a carbon source and a titanium dopant, the compaction density and the electrochemical performance of the material are remarkably improved, and the preparation method specifically comprises the following steps: mixing iron phosphate, lithium carbonate, the carbon source and auxiliary materials; the preparation method comprises the following steps: carrying out coarse grinding and fine grinding, respectively preparing large-particle lithium iron phosphate and small-particle lithium iron phosphate (a material A and a material B) by adopting spray drying and high-temperature calcination processes, mixing the material A and the material B according to a ratio, adding auxiliary materials, grinding, further carrying out spray drying, calcining and crushing to obtain a final lithium iron phosphate product, and the maximum compaction density of the prepared material can reach 2.712 g / cm < 3 >. According to the present invention, the maximum 1C discharge specific capacity can achieve 140.5 mAh / g, the maximum 1C 3.2 V discharge platform retention rate is 91.4%, and the prepared lithium ion battery negative electrode material has characteristics of excellent conductivity, high discharge capacity and good cycle stability, and is suitable for power batteries and energy storage batteries.