80 results about "Lithium battery" patented technology

An all-solid lithium secondary battery has excellent reliability including safety. However, in general, its energy density or output density is lower than that achieved by liquid electrolyte systems.

The all-solid lithium battery includes a lithium ion-conducting solid electrolyte as an electrolyte. The lithium ion-conducting solid electrolyte is mainly composed of a sulfide, and the surface of a positive electrode active material is coated with a lithium ion-conducting oxide. The advantages of the present invention are particularly significant when the positive electrode active material exhibits a potential of 3 V or more during operation of the all-solid lithium battery, i.e., when redox reaction occurs at a potential of 3 V or more.

The present invention relates to a method for winding coil core of lithium ion battery which comprises of steps of: unreeling the first membrane and the second membrane by unwinders of their own respectively at the same time, sending two source of two membranes connected between upper briquetting and lower briquetting of unwinder to be clamped, puncturing coiling needle, and inserting two electrode slices, driving upper briquetting and lower briquetting closed to clamp the next first membrane and the second membrane making the clamped parts of two membranes are connected, starting membrane cutter to cut the two membranes, pressing and binding the coiled coiling core rudiment, the winding coil core of lithium ion battery is obtained. Comparing to the present technique, the present invention can reduce cost of winding coil core of lithium ion battery, and at the same time, is suitable for semi-automatic and full-automatic unwinder and improves the production efficiency.

The present invention relates to a lithium cell flexible package film and its production method. It is composed of 7 layers of base layer, adhesive resin layer, chemical conversion treatment layer, aluminium foil layer, chemical conversion treatment layer, adhesive resin layer and thermal sealing layer, in which the thermal sealing layer is multi-layer coextrusion structure, and is formed from at least two layers of resin, in which at least one layer is polyethylene resin, and at least one layer is polypropylene resin. Said invention also provides the concrete steps of its production method.

The invention relates to a method for preparing a high-temperature resistant microporous membrane. The method sequentially comprises the following steps: (A) mixing raw materials consisting of 20-55% (by weight) of resin mixture and 45-80% (by weight) of membrane forming solvent; (B) carrying out melt extrusion on the mixed raw materials, and cooling to form a sheet; (C) longitudinally and transversely stretching the sheet, so as to form a membrane; (D) extracting the membrane forming solvent from the membrane through an extraction solvent, so as to form a microporous membrane; (E) carrying out heat-setting on the microporous membrane formed in the step (D), wherein the resin mixture consists of the ingredients in percentage by weight: 2-10% of high-temperature resistant resin, 5-15% of polypropylene and 75-93% of polyethylene, the melting point of the high-temperature resistant resin is higher than 170 DEG C, and polyethylene with the molecular weight greater than 106 accounts for 10-30% the total weight of the polyethylene. The method for preparing the high-temperature resistant microporous membrane, disclosed by the invention, aims to provide the high-temperature resistant microporous membrane which is good in temperature resistance and relatively high in melting rupture temperature and better meets the use requirements of lithium battery diaphragms.

The invention discloses a modified lithium-rich manganese-based cathode material for a lithium ion battery. The structural general formula of the material is (La<1-x>Sr<x>)MnO<3-delta>, wherein x is equal to or greater than 0 and less than or equal to 0.3, a is equal to or greater than 0.8 and less than or equal to 1, and delta is equal to or greater than 0 and less than or equal to 0.75; the modified lithium-rich manganese-based cathode material is prepared through the method 1 or method 2 as follows: method 1: lanthanum salt, strontium salt and manganese salt are mixed according to the stoichiometric proportion to prepare a (La<1-x>Sr<x>)MnO<3-delta> precursor solution, then a complexing agent is added into the solution and stirred uniformly, the lithium-rich manganese-based cathode material is added into the solution, heating is performed to evaporate the solution to form gel, and finally the dried gel is calcined, so that the modified cathode material is obtained; method 2: a precursor solution is prepared according to the method 1, a complexing agent is added into the solution and stirred uniformly, then the mixed solution is heated until the solution is burnt into powder, the powder is pre-burnt and is mechanically mixed with the lithium-rich manganese-based cathode material, and the mixture is calcined, so that the modified cathode material is obtained.

The invention relates to a method for preparing the cathode material used in a ferrous phosphate lithium battery by adopting low-valent oxyacid of phosphorus; the technical proposal is as follows: lithium salt, ferrous salt, phosphate, and hypophosphorous acid or hypophosphite are blended according to the mol ratio that Li: Fe: PO4<3->: H3PO2 or AH2PO2 or E(H2PO2)2 is equal to x: y (1-z): k. Carbon-containing compound or carbon powder and wet milling liquid are added, ball milling is carried out for 3-12 hours, and the mixture is dried in atmospheric pressure or vacuum at 48-100 DEG C. The dried powder is prepared into the lithium iron phosphate containing controllable Fe2P by two-stage sintering process or temperature programmed two-stage sintering process. When the molecular formula of hypophosphite, one ingredient of the reaction composite, is AH2PO2 or E(H2PO2)2, A is Li<+>, Na <+>, K<+>, Ag<+> or NH<+>, E is Ca<2+>, Sr<2+>, Ba <2+>, Ga <2+>, Ge<2+>, Sn<2+>, Sc<2+>, Mn<2+>, Fe<2+>, Co<2+>, Ni<2+>, Cu<2+>, Zn<2+> or Mo<2+>. The method of the invention has low cost of raw materials, broad source of raw materials, simple preparation and short time consumed; the prepared materials have even composition, excellent discharge performance and good discharge cycling performance in heavy current.

The invention discloses a protective shell of an electronic device with a charge-discharge function. The protective shell of the electronic device with the charge-discharge function comprises a base shell, wherein the electronic device is arranged on the base shell, a circuit board and a needle head connector are arranged on the base shell, and the needle head connector is in electric connection with the circuit board or is integrated on the circuit board. The protective shell of the electronic device with the charge-discharge function is capable of directly charging the electronic device through the needle head connector, capable of charging other equipment needing to be charged through the needle head connector, and capable of further supplying power to the electronic device through a charging battery in the protective shell. Solar energy is converted into electricity through a solar charging board, so that the lithium battery in the protective shell is charged or a battery inside the electronic device is directly charged, energy is saved, the protective shell is capable of meeting the non-stop usage requirement even under the condition that charging can not be carried out through a common power source, and therefore great convenience is brought to a user.

The invention belongs to the technical field of new energy materials, in particular to an all-solid-state lithium ion battery and an integrated composite sintering preparation process thereof. The all-solid-state lithium ion battery comprises at least one electrode-electrolyte composite electrode sheet. The electrode of the electrode-electrolyte composite electrode sheet is made of lithium oxide positive electrode or oxide negative electrode material, and the electrode is a solid oxide electrolyte. The interface problem of the all-solid-state lithium battery can be effectively improved and theinterface bonding degree and the interface structure stability between the electrode and the solid electrolyte can be remarkably enhanced so that the single cell has higher density and energy densityand also has very excellent safety performance and is suitable for large-scale production and application.

The invention provides a lithium battery and a lithium battery packaging housing. The lithium battery comprises a housing, a cover plate and a pole piece roll core arranged in the housing. The front surface and the back surface of the housing are consistent in structure, and the left side surface and the right side surface of the housing are consistent in structure. A heat superconducting pipelineand a refrigerant channel are combined together on the housing; the heat superconducting pipeline is filled with a phase change inhibition working medium to form a phase change inhibition heat transfer packaging housing, and the heat superconducting region has the characteristics of high heat conduction rate and good temperature uniformity; and by utilizing the characteristics of high heat conduction rate and good temperature uniformity of the heat superconducting region and high heat exchange rate of the refrigerant heat exchange region, the temperature difference between a battery and the outside and the effective heat transfer area are increased, the heat dissipation and heat equalization capabilities of the battery are greatly improved, and the safety performance of the lithium battery is improved.

A method of producing a powder mass for a lithium battery, the method comprising: (a) mixing graphene sheets and an elastomer or its precursor in a liquid medium or solvent to form a suspension; (b) dispersing a plurality of particles of an anode active material in the suspension to form a slurry; and (c) dispensing the slurry and removing the solvent and/or polymerizing/curing the precursor to form the powder mass, wherein the powder mass comprises multiple particulates of the anode active material, wherein at least one of the particulates is composed of one or a plurality of the particles encapsulated by a thin layer of graphene/elastomer composite having a thickness from 1 nm to 10 μm, a lithium ion conductivity from 10⁻⁷ S/cm to 10⁻² S/cm and an electrical conductivity from 10⁻⁷ S/cm to 100 S/cm.

The invention belongs to the technical field of solid electrolyte membranes for all-solid-state lithium batteries, and particularly relates to an application of a functionalized quantum dot compositesolid electrolyte membrane to the field of the all-solid-state lithium batteries. The functionalized quantum dot composite solid electrolyte membrane is prepared by selecting polyethylene oxide (PEO)as a polymer matrix, performing co-mixing and microwave-assisted reaction on polyethylene glycol diglycidyl ether (PEGDGE), diethylenetriamine and a citric acid aqueous solution to prepare PEGDGE functionalized carbon quantum dots as fillers, co-mixing PEGDGE functionalized carbon quantum dot dispersion liquid, Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and the PEO to prepare a membrane casting solution, and performing a casting method. The prepared functionalized quantum dot composite solid electrolyte membrane shows more excellent lithium ion conductivity and mechanical property compared with a traditional PEO electrolyte membrane.

The invention relates to an embedding method of a lithium battery sensing optical fiber. The key is to avoid physical damage, optical performance decline or battery electrolyte performance decline ofthe optical fiber sensor after long-term use caused by direct contact between the optical fiber and electrolyte. The method has a plurality of modes and is suitable for a plurality of practical environments. The optical fiber sensor can be effectively embedded into the lithium battery to monitor various sensing quantities such as temperature, vibration, strain/stress and the like without affectingthe battery performance and the optical fiber sensing performance. The embedding process and the sealing process for arranging optical fibers into lithium batteries can be provided and a good foundation is laid for distributed optical fiber temperature measurement inside lithium batteries in the later period.

The invention provides an ionic liquid dehumidifying method and an ionic liquid dehumidifying system for regulating gas humidity. The ionic liquid dehumidifying method comprises the following steps: enabling gas with higher humidity to sufficiently contact with a gas dehumidifying agent barren liquor, thus at least enabling moisture in the gas to be absorbed by the gas dehumidifying agent barren liquor to obtain a gas with lower humidity and a gas dehumidifying agent rich liquor; the gas dehumidifying agent barren liquor contains ionic liquor at least capable of absorbing water. Preferably, ionic liquid is adopted as the gas dehumidifying agent barren liquor. Preferably, the ionic liquid can also absorb volatile organic compounds. Water in the gas can be efficiently and fast removed by adopting the ionic liquid as a dehumidifying agent, the needed equipment is simple, and the system can stably and reliably run, and is safe and environment-friendly. The ionic liquid dehumidifying method and system are especially applicable to manufacturing shops needing to control air humidity, such as lithium battery, medicament manufacturing shops, and dried warehouses; and also, the ionic liquid dehumidifying method and system can also be applied to dewatering and purification technology of natural gas, associated gas and the like.

The invention relates to the technical field of explosion-proof lithium batteries, and discloses a combined explosion-proof lithium battery and a mounting seat thereof. The combined explosion-proof lithium battery comprises a fixing plate, a guide frame is fixedly connected to the upper end of the fixing plate, a supporting plate is slidably connected to the inner side of the guide frame, four T-shaped sliding grooves located in the inner side of the guide frame are formed in the upper end of the fixing plate, and t-shaped sliding blocks extending to the upper sides of the T-shaped sliding grooves are slidably connected to the interiors of the four T-shaped sliding grooves. The combined explosion-proof lithium battery and the mounting seat thereof have the advantages of being convenient todisassemble and assemble, high in protection performance, capable of monitoring and adjusting temperature, explosion-proof, loss-stopping and the like, and solve the problems that: most existing lithium battery packs adopt combination of a plurality of lithium batteries to meet the requirements of voltage and electric quantity reserves, no protection measures such as an interlayer exists among the lithium batteries, a chain reaction of explosions is easily caused, the lithium battery packs are not provided with temperature monitoring and effective heat dissipation structure, and the explosioncannot be fundamentally prevented.

The invention discloses a light energy group control sun-shading system. The light energy group control sun-shading system involves a sun-shading window body, a controller and a solar cell panel, wherein the controller comprises a controller shell, a PCB board, a lithium battery, a channel controller and a touch panel, the PCB board and the lithium battery are fixedly installed in the controller shell, the channel controller is fixedly connected with the PCB board and exposed out of the controller shell, the touch panel is installed on the surface of the controller shell, and the PCB board iselectrically connected with the lithium battery, the channel controller and the touch panel correspondingly; a window gap space is formed by an outer side window body and an inner side window body ofthe sun-shading window body, driving motors and venetian blinds driven by the driving motors are installed in the window gap space, and the driving motors are electrically connected with the channel controller; and the solar cell panel is installed on a frame body profile, the controller shell is embedded in the frame body profile and enables the touch panel to be exposed, and the lithium batteryis further electrically connected with the solar cell panel. The light energy group control sun-shading system is adopted, the solar cell panel absorbs weak light to provide a stable independent powersupply, and group control of the plurality of pairs of venetian blinds by the single controller is realized.

The invention discloses a method for repairing a ternary positive electrode material with deteriorated performance and the acquired ternary positive electrode material. The material repairing method comprises the steps that a repairing agent is dispersed in an organic solvent; after ultrasonic dispersion, the ternary positive electrode material with deteriorated performance under a state of continuous stirring is added; and the repaired ternary positive electrode material is acquired after filtering and high temperature sintering. The interface of the ternary material can be adjusted by adjusting the amount of the repairing agent and other parameters. At the same time, the repairing agent can react with residual lithium on the surface of the material to form a stable compound, which is beneficial to reducing the residual lithium on the surface of the material and can significantly restore the material performance. According to the invention, the previous technical ideas of preventing performance degradation or deterioration of the ternary positive electrode material of a lithium battery is broken; the material which is degraded and deteriorated is remedially treated; and the problems which are not effectively solved during the preparation, transportation and storage of the ternary positive electrode material are solved.

The invention discloses an online self-learning measurement device for an internal resistance of a lithium battery and a measure method thereof. The measurement device comprises a lithium battery body, and further comprises a current sensor for detecting a current signal of the lithium battery body; an electricity sensor for detecting and calculating current electricity of the lithium battery body; a temperature sensor for detecting temperature of the surface of the lithium battery body; a cycle counter for calculating the cycle numbers of the lithium battery body that has been used; a controller for calculating a current internal resistance of the lithium battery body with the current signal parameter, the current electricity parameter, the temperature parameter, the voltage signal parameter and the cycle numbers; a voltage controller for converting a terminal voltage analog signal of the lithium battery body into a digital signal; a correction load for online learning and correctionof the internal resistance measurement device. The online self-learning measurement device for internal resistance of lithium battery can combine offline detection, calibration and online self-learning correction for remaining use time of the lithium battery and has the characteristics of good robustness, high precision and online self-adaptation.

The invention discloses a method for producing a ytterbium-doped lithium nickel cobalt manganese oxide material used for a lithium ion battery. The method comprises the following steps: a) weighing the raw materials according to stoichiometric ratio; b) adding absolute ethyl alcohol in the raw materials, performing ball milling and taking the materials out and drying the materials; c) adding acetate fibre, potassium chloride and sodium chloride in the raw materials obtained in the step 2) for mixing with molten salt and absolute ethyl alcohol, performing ball milling and drying the materials; and d) sintering the raw materials obtained in the step c), cooling the materials, washing the obtained powder, and drying to obtain the material. The ytterbium-doped lithium nickel cobalt manganese oxide material has higher discharge capacity and gram capacity; and has a hollow tube structure, through further processing, the tube wall is loosening so as to alleviate the volume expansion problem; inorganic filling material titanium dioxide in the acetate fibre is used, and is doped into crystal lattice of the ytterbium-doped lithium nickel cobalt manganese oxide material, so that stability of the ytterbium-doped lithium nickel cobalt manganese oxide material is improved, and the capacity attenuation problem of the lithium ion battery is improved.

The invention relates to the field of lithium ion batteries and discloses a safe flexible package lithium ion battery tab. The tab comprises a tab body and a PTC coating applied to the surface of thetab body, wherein the PTC coating is formed by curing PTC slurry, and the PTC slurry comprises a PTC base material, a dispersant, a binder and a solvent; the PTC base material is selected from at least one of BaTiO3 and BaPbO3. The PTC material is applied to positive and negative tabs of a flexible package lithium battery, so that thermal runaway of the battery is effectively controlled, and the safety of the battery is greatly improved.

The invention discloses a durable overcharge lithium ion electrolyte with excellent anti-overcharge characteristic and a lithium battery using the same. Said durable overcharge lithium ion electrolyte contains an additive shown as right structure formulation, and weight rate of the additive in the lithium ion electrolyte is 0.01%-33.6%; in right structure formulation, X, Y, Z come from alkyl, alkoxy, aryl group, hydroxy, carboxyl, aether-oxyl or halogen with carbon atom between 0-12. The lithium ion battery can be prepared by using the durable overcharge lithium ion electrolyte. The additive added to the lithium ion electrolyte can increase durable overcharge property of the electrolyte efficiently, increase charge/discharge cycle efficiency, hardly effects normal property of the lithium ion battery and perfectly satisfy application need.

A rechargeable lithium battery includes: a negative electrode including a negative active material; a positive electrode; a separator interposed between the negative electrode and the positive electrode; and an electrolyte solution including an additive, wherein the negative active material includes a Si-based material, the Si-based material is included in an amount from about 1 to about 70 wt % based on total amount of the negative active material, and the additive includes fluoroethylene carbonate and a compound represented by the following Chemical Formula 1.

In the above Chemical Formula 1, R¹ to R³ are each independently a substituted or unsubstituted C2 to C5 alkyl group.

The invention discloses a method for lowering water content in a flexibly packaged lithium ion battery in a pre-charging formation process, and belongs to the technical field of the lithium ion battery. According to the method, in the pre-charging formation process of the flexibly packaged lithium ion battery, water content in an electrolyte is absorbed by a molecular sieve so as to lower the water content in the battery; for the flexibly packaged lithium ion battery reserved with an air bag and to be subjected to pre-charging formation, the molecular sieve is sealed in the air bag, and the molecular sieve and the air bag are removed together after pre-charging formation is completed, and then battery packaging is performed; for the flexibly packaged lithium ion battery adopting a negative pressure system for pre-charging formation, the molecular sieve is put in an electrolyte loop or an electrolyte storage bottle of the negative pressure system; by adoption of the method, water content in the battery can be effectively lowered; water content which enters the battery electrolyte from the environment is absorbed by the molecular sieve, so that influence to the interior of the battery from the external environment in the pre-charging formation process can be lowered; and in addition, the operation is simple and convenient.