64results about How to "No reduction in capacity" patented technology

The invention relates to a battery electrode material, in particular to a lithium titanate composite electrode material with surface coating layer; in the lithium titanate composite electrode material with surface coating layer, the electrode material is composed of lithium titanate particles and a coating layer coated with the surface of the lithium titanate particles; the particle size of the lithium titanate particles is 100nm-95mum, the average thickness of the surface coating layer is 0.2nm-5m, and the particle diameter of the composite electrode material is 0.1-100mum; the material of the surface coating layer is one or mixture of more than one kind of insulation oxide, insulation composite oxide, aluminium phosphate, magnesium phosphate, lithium fluoride, lithium phosphate or LiMPO4, wherein M is magnesium, ferrum, cobalt, nickel, chromium, titanium or vanadium; in the invention, by carrying out surface coating treatment to the surfaces of the existing lithium titanate particles, a layer of protective film is formed on the surface, so as to change the physical and chemical characteristics of the surface of the lithium titanate active material, the surface can not be reacted with electrolyte even if under overpotential condition, so as to avoid ballooning and ensure the capacity and the circularity of the battery not to be reduced.

The invention relates to a preparation method of a single crystal lithium ion battery nickel cobalt lithium manganate cathode material. The method comprises the following steps of: (1) taking a small-grain crystal spherical NCM ternary precursor, a lithium salt and an A element-containing nano fluxing agent as raw materials, uniformly mixing the raw materials by adopting a dry-method high-speed mixing mode, and performing primary sintering under an oxygen-enriched atmosphere condition; (2) subjecting the sintered material to jaw breaking, roller pairing, crushing and sieving so as to obtain asingle-crystal once-sintered base material; and (3) mixing the primary sintering base material with a B element-containing nano coating agent, sintering again under an oxygen-enriched atmosphere condition, and then performing jaw breaking, roller pairing, crushing and sieving to obtain the large single crystal lithium nickel cobalt manganate cathode material. The cathode material prepared by the invention has the characteristics of the large particle size, the good dispersity, the moderate specific surface area, the high compaction density, the high voltage, the good high-temperature cycle performance and the like.

A stacked semiconductor package includes a semiconductor chip module including at least two semiconductor chips with a semiconductor chip body having an upper surface, a lower surface, side surfaces coupling the upper surface and the lower surface, and a circuit part. The semiconductor chips include pads coupled to the circuit part and disposed at an edge of the upper surface. A recess parts are concavely formed in the side surfaces corresponding to each pad. Conductive connection patterns cover the recess parts, and each conductive connection pattern is electrically connected to a corresponding bonding pad. The semiconductor chip module is disposed on a substrate, and the contact pads of the semiconductor substrate are electrically connected to the conductive connection patterns. The stacked semiconductor package provides an improved structure that can contain a plurality of stacked semiconductor chips with no reduction in data storage capacity.

A high-specific capacity secondary Li ionic battery includes a shell containing an electrolyte bag, a positive, a membrane and a negative, among which, the positive is composed of a positive collector and Li compound oxide attached to its surface, the negative is composed of a negative collector and adsorption and de-adsorption Li ionic substance containing inactive oxide fast ions adhered on its surface, thickness of the active substance adhered on the negative surface is 0.03-0.30mm, the weight ratio of the inactive oxide fast ions playing the role of a conductor and the negative active substance is 0.01-1.0:100, the mean diameter of the ions is 10-300nm. When using as active material to fill in a thick electrode with high density, an inorganic oxide fast ionic conductor is applied to the negative to improve the Li ionic transmission efficiency from the active substance to the negative surface.

The invention discloses a preparation method for a novel lithium vanadium phosphate/bamboo charcoal composite cathode material. The preparation method comprises the following steps of: uniformly mixing vanadium pentoxide, lithium hydroxide or lithium fluoride or lithium carbonate or lithium acetate, ammonium dihydrogen phosphate or phosphoric acid, salicylic acid or citric acid or ascorbic acid or tartaric acid or sucrose, and bamboo charcoal in proportion; evaporating water in a 50-80 DEG C water bath to form a sol; drying the sol in a vacuum drying oven for 8 hours at 120 DEG C to obtain a lithium vanadium phosphate precursor; cooling the lithium vanadium phosphate precursor to room temperature, grinding the precursor and putting the ground precursor into a die to prepare a cake under a certain pressure; putting the cake into a porcelain boat, and covering conductive carbon black (SP) powder on the cake; heating the cake in a microwave oven for a certain period of time; cooling the cake to room temperature; and taking the cake out, and grinding the cake to obtain a bamboo charcoal coated lithium vanadium phosphate/bamboo charcoal composite material sample, thus forming a bamboo charcoal connected conductive network. When used as a cathode material of a lithium ion power battery, the novel lithium vanadium phosphate/bamboo charcoal composite cathode material has the advantages of high capacity and magnification, long service life, low price and environmental friendliness.

The invention relates to a process for setting up direct radio communication between two or more user devices within a mobile cellular communications system, said users subscribing to the same operator, comprising: - using a cognitive radio technique to detect spectrum resources available for radio communications in a certain area within which said at least two user devices are located, characterized in that the process further comprises: - selecting at least one resource from among the available resources, said resource being a resource of the operator common to said two or more user devices, and - setting up a direct radio link between said two users using said detected free resource of the operator. The invention also relates to a system for setting up direct radio communication between two or more user devices within a mobile cellular communications system.

The invention provides a cylindrical lithium ion battery. The cylindrical lithium ion battery comprises a battery cell, a battery cover cap and a protection plate, wherein the periphery of the battery cover cap is annular; the central part of the battery cover cap protrudes to form a mounting groove; the protection plate is placed in the mounting groove and is electrically connected with an anode plug and a cathode plug of the battery cell; the protection plate, the cover cap and the battery cell are fixed by low-temperature and low-pressure injection molding. According to the cylindrical lithium ion battery, the protection plate is placed in the battery cover cap so as to effectively utilize the space below the battery cover cap; the capacity of the battery is not reduced; the cylindrical lithium ion battery can be directly connected with an electric appliance for external use and the safety is high.

The invention discloses a lithium ion battery anode material and a lithium ion battery prepared therefrom. The anode material comprises15-60% by weight of lithium cobaltate, 10-45% by weight of nickel-cobalt lithium manganate and 10-40% by weight of spinel lithium manganate,. The lithium ion battery anode material prescription and the lithium ion battery made from the material prescription can improve the overcharge property resistance of the lithium ion battery and can not decrease the capacity of the lithium ion battery.

The invention provides a preparation method and application of lithium tin alloy powder for a lithium ion battery negative electrode, and the preparation method is characterized by comprising the following steps: step 1, flatly attaching tin-based foil and a lithium strip together to obtain a stacked metal sheet; step 2, in a dry and oxygen-free environment, pressing the stacked metal sheets through pressure equipment, so that the tin-based foil is completely embedded into the lithium strip, and a lithium-tin alloy metal sheet is obtained; and step 3, grinding the lithium-tin alloy metal sheetinto lithium-tin alloy powder through grinding equipment in a dry and oxygen-free environment. The particle size of the prepared lithium-tin alloy powder is 10 [mu]m-100 [mu]m, and the lithium-tin alloy powder is added into a negative electrode to supplement lithium, so that the first-circle coulombic efficiency and the cycling stability of the battery can be improved. The lithium tin alloy powder for the negative electrode of the lithium ion battery is simple in preparation operation and mature in technology, and can be used for supplementing lithium for various negative electrode materials,so that the lithium tin alloy powder has a very wide development prospect in a lithium supplementing process of the lithium ion battery.

The present invention relates to device for production of uncorks of dry toner/selenium-coated drum box of rechargeable laser printers as well as a process for recharging said boxes by using said device. Said device comprises a heating member having a handle and a heating shank; a heat treating element having a thermal conduction element (heat conductor), a ring form cut selvedge and holes with interior diameter equal to the cut selvedge; and a stopping member used for preventing the cut selvedge from invading into part of the box. Said process comprises the steps as follows: predetermining a time by utilizing the heating shank of the heating member which works in resistance heating mode; transferring the generated heat to the cut selvedge through the thermal conduction element to heat the cut selvedge to an appropriate temperature; locating the cut selvedge at the predetermined surface of the dry toner/selenium-coated drum box, pushing the cut selvedge with appropriate force to melt said surface, and working out rechargeable uncorks with interior diameter equal to that of the cut selvedge; recharging the containers of the dry toner/selenium-coated drum box with dry toner powder through said uncorks; sealing the uncork with plugs.

The invention relates to a modular lithium battery DC power system, the system comprises a plurality of lithium battery packs, one of the lithium battery packs comprises an explosion-proof tank, a charging module is arrange in the explosion-proof tank, one end of the charging module is connected with an input end of one lithium battery pack through a wire, the lithium battery group is connected with a battery management system in a explosion-proof case, and the battery management system is separately connected with a fire extinguishing device, a smoke sensor, a heater, a fan, a discharge control unit and a equalization module in the explosion-proof case through wires in sequence; the equalization module is connected with the lithium battery pack through a wire, and the discharge control unit is connected with a DC output end through a wire. According to the invention, the service life is long, the applicable temperature range is wide, the control mode is optimized, the capacity is hardly reduced in maintenance process, the battery packs can perform on-line autonomous equalization, the battery packs can perform off-line autonomous maintenance, the battery packs support hot swap, and the using process is nontoxic and non-polluting.

The invention provides a ternary anode material. The material comprises a ternary material and a coating layer coating the surface of the ternary material, wherein the coating layer is prepared from vanadium oxide which is 0.1-10 percent of the mass of the ternary anode material. According to the ternary anode material, the surface of the ternary material is coated with the vanadium oxide layer, so that the transmission rate of the lithium ions of the ternary anode material can be effectively improved, the side reaction generated by direct contact of the ternary material and electrolyte can beinhibited since the contact area between the ternary material and electrolyte is reduced, corrosion of the electrolyte for the surface of the ternary material is reduced, the electrochemical performance of the ternary anode material is improved, and the cycling performance of the ternary anode material is improved. The invention further provides a method for preparing the ternary anode material,the ternary material coated with vanadium oxide can be prepared by once sintering process by improving the preparation process, and time and cost for processing can be greatly reduced.

The invention belongs to the technical field of battery materials, and particularly discloses a sodium ion battery positive electrode material and a preparation method and application thereof. The chemical formula of the sodium ion battery positive electrode material is NaxCuyFezMnaMbO2 + delta/(ZcOs + YrXOt), and the structure of the sodium ion battery positive electrode material is a ZcOs + YrXOt surface modified layered structure. The sodium ion battery positive electrode material disclosed by the invention can be obtained by carrying out one-step or multi-step mixing on various raw materials and then carrying out high-temperature sintering. The preparation method is simple, and all-around uniform coating is easy to form; and the prepared sodium ion battery positive electrode material is high in air stability, excellent in rate capability and stable in capacity.

A plastic bag sealing machine provided by the present invention comprises a frame, a driving system, a sealing mechanism and a tensioning mechanism. The sealing mechanism comprises a heat seal seat, heat seal blocks and a dead lever, each heat seal block is provided with a heating unit, and the heat seal seat is positioned below the two heat seal blocks. The tensioning mechanism comprises first material pressing rods and second material pressing rods, and the first material pressing rods and the second material pressing rods are respectively disposed at two sides of the heat seal seat and in contact with a bag mouth side boundary and a bag bottom side boundary of a plastic bag. Compared with the prior art, the plastic bag sealing machine is provided with two heat seal blocks to respectively perform individual widening, heat seal and bonding of side surface seals of the bag mouth and the bag bottom of the plastic bag, use intensity requirements of the plastic bag are satisfied, and capacity of the plastic bag cannot be reduced; and the seals of the bag mouth and the bag bottom of two adjacent plastic bags can be bonded by one-time heat seal operation, so that production efficiency is high, and product quality is good.

The invention discloses a preparation method of a hollow mesoporous carbon material. The method comprises the following steps: carrying out surface carbonization on powder by taking the powder of Si, Ti, Cr or W and a gas containing carbon as raw materials so as to obtain a composite powder precursor of which the surface is of a carbide and the middle part is of a simple substance material; etching the obtained composite powder by utilizing chlorine to remove the Si, Ti, Cr or W element from the precursor so as to obtain the hollow mesoporous carbon material. The structure of the hollow mesoporous carbon material disclosed by the invention is different from that of a homogeneous mesoporous material in the prior art, namely, ions are effectively transported by virtue of hollow macropores, so that the fully utilization of micropores is realized. Thus, the phenomenon that the capacitance is obviously reduced due to the 'pore blocking' of a micropore structure is avoided. When the mesoporous carbon material with a hollow structure is applied to an electrode material of a capacitor, the charging efficiency is greatly improved and the charging time is obviously shortened.

The invention discloses a preparation method of a novel gel electrolyte and an aluminum electrolytic capacitor. The preparation method of the novel gel electrolyte comprises the following steps of: taking an acrylamide derivative as a monomer, and introducing acrylic acid as a cross-linking agent; S2, impregnating a conventional liquid electrolyte, injecting the gel electrolyte obtained in the step S1, and performing packaging to obtain an electrolyte mixture; S3, heating or illuminating the electrolyte mixture obtained in the step S2 to obtain a gelatinized electrolyte. The gelatinized electrolyte obtained by the manufacturing method disclosed by the invention can reduce the fluidity of the electrolyte, so that the electrolyte can be in a semi-solidified state in the core package after the core package is soaked in the electrolyte, free liquid electrolyte does not exist, the situation of liquid leakage does not occur, and the safety of the capacitor in use is ensured; and moreover, the capacity of the capacitor cannot be reduced by adopting the gelled electrolyte on the premise of improving the voltage endurance capability of the capacitor.

The invention relates to a pencil case capable of preventing a pen core from being damaged. The pencil case comprises a pencil case body; the pencil case body comprises a case body and a case cover; the case body and the case cover are closed through magnetic material; a magnet is mounted on the inner left side of the case body; a rubber pen cap is arranged inside the case body; a magnetic iron sheet is arranged on the end surface of the rubber pen cap; and the rubber pen cap is adsorbed on the magnet through the magnetic iron sheet. The pencil case capable of preventing a pen core from being damaged has the advantages that a pen can be fixed in the pencil case, so that the pen core can not be damaged, and the pen can be taken and used conveniently; and the capacity of the pencil case can not be decreased.

The invention relates to a freezing device of an optical material laminating machine. The freezing device comprises a conveying belt and is characterized by further comprising a feeding mechanism, a first product carrying mechanism, a refrigerating mechanism and a second product carrying mechanism which are sequentially arranged along the conveying belt, and the refrigerating mechanism comprises arotating disc and four refrigerating boxes which are uniformly distributed on the rotating disc. Compared with the prior art, the freezing device has the following advantages that OCA is refrigeratedin advance through adding the four refrigerating boxes, so that glue overflow during stripping and laminating of the OCA is prevented; and the machine is reasonable in design, the productivity is notreduced after the machine is used, and waste of OCA cost is reduced.