32results about "Electrolyte accumulators manufacture" patented technology

Provided is a process for producing a rope-shaped alkali metal battery, comprising: (a) providing a first electrode comprising a first conductive porous rod and a first mixture of a first electrode active material and a first electrolyte residing in the pores of the first porous rod; (b) wrapping or encasing a porous separator around the first electrode to form a separator-protected first electrode; (c) providing a second electrode comprising a second conductive porous rod and a second mixture of a second electrode active material and a second electrolyte residing in the pores of the second porous rod; (d) combining the separator-protected first electrode and second electrode to form a braid or a yarn having a twist or spiral electrode; and (e) wrapping or encasing a protective casing or sheath around the braid or yarn to form the rope battery.

The present invention relates to a battery module, which includes one or more battery cell units, and the battery cell unit includes a battery cell, a fixing member located surrounding an outer circumference surface of the battery cell, and a heat absorbing material located between the battery cell and the fixing member, and as a result, heat generation inside the battery module is suppressed, and ignition between the series-connected battery cell units may be suppressed. Accordingly, excellent charge and discharge efficiency, an excellent cycle property and a lifespan property of the battery may be exhibited without concern for explosion or ignition of the battery module.

The invention relates to the field of lithium ion battery designs, and discloses a lithium ion battery pack and a soldering method for single batteries therein. The lithium ion battery pack comprises a plurality of single batteries which are connected in series or in parallel through soldered lugs; and the soldering method for soldering the first lug and the second lug of any two single batteries includes the following steps: a rigid plate is arranged on the backs of the horizontal bent sections of the first lug and the second lug, and is in plane contact with the backs of both the first lug and the second lug, wherein a predetermined gap is reserved between the first lug and the second lug which are horizontally opposite to each other; soldering is carried out on the top of the rigid plate in the gap between the first lug and the second lug, a tin bar is melted, the gap is covered by and filled with the melted tin, and the melted tin permeates to the top of the rigid plate; and the melted tin is solidified and shaped. The heat-dissipating effect of the method is better, and moreover, the structure of the soldered parts of the lugs is firmer, which can help to enhance the conductivity of the lithium ion battery pack.

In a nonaqueous secondary battery including a pressure-operated current interrupt device, a ratio (Vt/Cr) of a sum Vt (cm³) of an effective pore volume Vp of the positive electrode active material layer, an effective pore volume Vn of the negative electrode active material layer, and a pore volume Vs of the separator to a volume Cr (cm³) of a remaining space in the battery case is 0.92 to 1.05. The volume Cr of the remaining space in the battery case is calculated by subtracting a volume Ce of the electrode body, a volume Cna of the nonaqueous electrolytic solution, and a volume Cc of auxiliary components from a volume Ct of the battery case. The remaining space volume Cr (cm³) is 14.8 vol % or higher of the volume Ct (cm³) of the battery case.

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 relates to a Na<+> superionic conductor (NASICON) type lithium-ion solid electrolyte collaboratively doping with F<->, B<3+> and Y<3+> ions and a preparation method thereof. The stoichiometric equation of the solid electrolyte is Li<1+x+2y-z>Y<x>Zr<2-x>B<y>P<3-y>O<12-z>F<z>, wherein x is equal to 0.1 to 0.5, y is equal to 0.1 to 0.3, and z is equal to 0.1 to 0.2. The NASICON type lithium-ion solid electrolyte collaboratively doping with the F<->, B<3+> and Y<3+> ions is obtained by uniformly mixing Y(NO3)<3>.6H2O, B2O3, LiF, ZrOCl<2>.8H2O, (NH4)<2>HPO4 and LiNO3 according to a mole ratio of being (0.1-0.5):(0.05-0.15):(0.1-0.2):(1.5-1.9):(2.7-2.9):(1.1-2.0) and carrying out heating, stirring, drying, ball grinding, pressing and sintering. The normal-temperature lithium ion conductivity of a solid electrolyte slice prepared according to the method is more than 5*10<-4> S/cm.

The invention discloses a flexible lithium-ion battery capable of working around the clock and a preparation method thereof. According to the battery, a membrane assembled by a stretched carbon nanotube macroscopic tube continuous body is taken as a current collector for positive and negative electrodes; and the membrane is subjected to porous treatment and electrolyte infiltration treatment in the membrane-forming process and an electrolyte can be stored into a carbon nanotube membrane as the current collector, so that the obtained battery still can normally work in harsh environments, such as extremely high temperature, extremely low temperature, vacuum and water. A battery main body comprises a positive electrode plate, a membrane and a negative electrode plate which are sequentially stacked. The invention further provides a preparation method of the battery. According to the flexible lithium-ion battery, the problem of a failure of an existing lithium-ion battery due to the fact that the current collector cannot store the electrolyte in the harsh environments can be effectively solved; the preparation process is in full integration with a production technology of an existing mainstream lithium-ion battery; mass production under existing production conditions is facilitated; and the flexible lithium-ion battery has very high practicability.

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.

A method for preparing a sodium-ion battery comprising a positive electrode and a negative electrode arranged to either side of an electrolyte, the positive electrode comprising, as the active material, a material made from sodium, the method comprising the following steps: a step of depositing a sodium salt on the surface of the positive electrode, before placing same in the battery; a step of assembling the positive electrode, the negative electrode and the electrolyte; and a step of forming a passivation layer on the surface of the negative electrode with the sodium ions from the decomposition of the sodium salt, by applying a first charge to the abovementioned assembly.

The invention discloses a rapid baking method for a square lithium ion battery, which comprises the following steps of 1, in a preparation stage, vacuumizing a vacuum drying oven in which the square battery is placed to P0 for the vacuumizing time of t0, and then filling nitrogen to normal pressure, 2, in a preheating stage, preheating and drying the vacuum drying oven in which the square battery is placed, 3, in a heat and pressure maintaining stage, maintaining the vacuum degree P2 in the vacuum baking oven for the preheated battery, 4, in a circulation stage, repeating the step 3 for circulation times of X0, 5, in a nitrogen cooling circulation stage, filling nitrogen into the baking device to normal pressure, keeping the normal pressure for t3, and keeping the normal pressure for t4 under the vacuum degree P3, 6, repeating the step 5 for circulation times of X1, and 7, ending the baking. According to the method, air exchange operation is carried out in the vacuum drying oven before baking, the moisture content of gas in the oven body before baking can be removed, what is guaranteed is that the moisture content of the battery baking environment is low, and the performance of the battery is brought into play.

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.

The invention discloses a deviation rectifying system and method for a cutting and stacking all-in-one machine for rectifying deviation between an unwinding device and a cutting device of the cutting and stacking all-in-one machine. The deviation rectifying system comprises an unwinding deviation rectifying device, an advancing deviation rectifying device and a clamping deviation rectifying device which are sequentially arranged in the conveying direction of a material belt. The unwinding deviation rectifying device is used for rectifying deviation of the feeding position of the material belt and conveying the material belt to the advancing deviation rectifying device. The advancing deviation rectifying device is used for rectifying deviation of the material belt conveyed by the unwinding deviation rectifying device and conveying the material belt to the clamping deviation rectifying device. The clamping deviation rectifying device is used for rectifying deviation of the material belt conveyed by the advancing deviation rectifying device and conveying the material belt to the cutting device. Thus, through the mode of three times of deviation rectifying, the deviation rectifying precision of the material belt can be improved, the deviation offset of the material belt in the direction perpendicular to the conveying direction of the material belt in the material belt conveying process is further reduced, the precision of a pole piece cut by the cutting device is guaranteed, and then the quality of a finished product laminated lithium battery is improved.

The invention discloses comb polymer electrolyte and preparation and application thereof; the comb polymer electrolyte has a chemical structural formula shown as formula I that is shown in the description, wherein a is an integer of from 10 to 800, x is 0.2 to 0.8, ax is a positive integer, m is an integer of from 3 to 29, n is an integer of from 1 to 31, and R is hydrogen atom or methyl. The keychemical formula structure of comb polymer, keying mode of main and side chains, substitution rate, integral synthetic pathway setting for the corresponding preparation method and parameter conditionsof process steps are modified so that the main and side chains of the comb polymer are keyed via ion keys, and the problem that polyoxyethylene polymer electrolyte has high crystallinity and low lithium ion transfer capacity can be effectively solved.

The invention provides a preparation method of a pole group of a high-capacity lithium-ion power battery. The preparation method comprises the step of manufacturing a pole piece, wherein the pole piece is produced by the following steps: coating the pole piece of the battery, grinding, slitting into strips, punching the positive pole piece and the negative pole piece of the slit strip according to the preset sizes respectively, carrying out corona heat sealing with diaphragms respectively to form different pole piece-diaphragm composite bodies, and then manufacturing the laminated pole group or the winding type pole group by use of different pole piece-diaphragm composite bodies. According to the prepared high-capacity lithium-ion power battery, the problems that the diaphragm and the pole piece inside the battery are dislocated, the diaphragm is folded, the performance and the safety of the battery are reduced due to vibration, bumping and long-term use of the high-capacity laminated battery are solved, and the stability and the safety of the battery are effectively improved.

The invention relates to a NASICO lithium-ion solid electrolyte synergistically doped with F<-> and Y<3+> ions and a preparation method thereof. The stoichiometric formula is shown as Li<1+x-y>Y<x>Zr<2-x>P3O<12-y>F<y>, wherein x is equal to 0.1 to 0.5, and y is equal to 0.1 to 0.2. The preparation method comprises the following steps of: uniformly mixing Y(NO3)3.6H2O, LiF, ZrOC12.8H2O, (NH4)2HPO4 and LiNO3 according to a mole ratio of (0.1-0.5):(0.1-0.2):(1.5-1.9):3.0:(0.9-1.4); and carrying out heating, stirring, stoving, ball milling, pressing and sintering. The lithium-ion conductivity of the prepared solid electrolyte thin film at a room temperature is greater than 10<-4>S/cm.

The invention belongs to the technical field of lithium battery materials, and particularly relates to a continuous preparation method of an ultrathin ceramic chip solid composite electrolyte of a lithium battery. The method comprises the following steps: adding polyvinylpyrrolidone into absolute ethyl alcohol at room temperature, stirring for 10-15 minutes, sequentially adding a lithium source, alanthanum source and a zirconium source, mechanically stirring for 120 minutes or more, adding a defoaming agent, and defoaming in vacuum for 20-50 minutes to obtain precursor slurry; scraping the slurry on a porous polymer film to form a film, then heating the polymer film to 130-160 DEG C, biaxially stretching the film, placing the stretched film on a conveyor belt, and continuously passing through a drying oven to form a solid ceramic green belt; cutting the solid ceramic green tape into ceramic blank sheets, placing the ceramic blank sheets in a sintering furnace, raising the temperatureto 450-600 DEG C at the rate of 2-3 DEG C/min for heating and heat preservation for 1-2 hours, then raising the temperature to 700-850 DEG C at the rate of 5-10 DEG C/min for sintering and heat preservation for 2-4 hours, and taking out the ceramic blank sheets after furnace cooling.

The invention discloses a manufacturing method of a battery and the battery. According to the manufacturing method of the battery, a shell is manufactured through the method that a thin plate is cut,bent and then welded, compared with traditional stretching forming of the battery shell, the manufacturing difficulty of the shell is small, the cost is low, the step of the process of putting a corepackage into the shell is optimized, and the risk of battery short circuit caused by scraping when the core package is put into the shell is avoided. Therefore, under the condition that the volume ofthe shell is not changed, the core package with a larger volume can be adopted to improve the capacity of the battery. Through cutting and bending methods in different forms, battery shells in different forms and sizes can be obtained, and the method can adapt to production of batteries in various forms and sizes.

The invention provides a lithium ion battery and a preparation method thereof, and relates to the technical field of lithium ion batteries. Specifically, the lithium ion battery mainly comprises a positive electrode, a negative electrode, electrolyte and a diaphragm, wherein the negative electrode comprises graphite, a silica material and a binder, and the binder comprises an acrylate compound; the electrolyte comprises a cyano compound. According to the invention, the short-circuit safety problem of the silicon-containing negative electrode is solved by adding the olefine acid ester binder, and the olefine acid ester binder has strong binding force on the expansion of the negative electrode, and can well inhibit the thickness increase of the negative electrode piece in the circulation process, thereby reducing the safety risk caused by the expansion of the negative electrode piece; meanwhile, a cyano additive is used in the electrolyte, so that the negative effect caused by an acrylate binder is solved, and the overall circulation and storage safety performance of the battery is greatly improved at the same time.

The invention discloses a pressurizing shaping and high-temperature aging integrated device for battery production. The pressurizing shaping and high-temperature aging integrated device comprises a first robot arm, a shaping device, a second robot arm and a high-temperature aging device which are arranged on the rear side of a flat belt conveying device and are sequentially arranged from left to right, and a material table arranged on the left side of the flat belt conveying device, wherein the high-temperature aging device comprises a horizontally-arranged hydraulic sliding table, a power unit, a heating box and a simulation device arranged on the heating box, an opening is formed in the front end of the heating box, a box door is hinged to the top of the opening through hinges, the bottom surface of the heating box is welded to a main shaft, a longitudinal oil cylinder is fixedly arranged on the outer wall of the rear side of the heating box, the piston rod of the longitudinal oil cylinder penetrates through the heating box and extends to the front side of the heating box, and a bottom plate is fixedly arranged at the extending end. The pressurizing shaping and high-temperature aging integrated devicehas the beneficial effects that the structure is compact, the performance of the battery under the actual use environment condition can be simulated, the working intensity of workers is relieved, the battery leveling efficiency is improved, and the battery production efficiency is improved.

Provided are a negative electrode including a current collector, a first active material layer including first active material particles and disposed on the current collector, and a first pattern and a second pattern alternately disposed separately from each other on the first active material layer, wherein the first pattern includes first pattern active material particles, the second pattern includes second pattern active material particles, a thickness of the first pattern is greater than a thickness of the second pattern, and a volume expansion rate of the second pattern is greater than a volume expansion rate of the first pattern, and a secondary battery including the negative electrode.

The embodiment of the invention relates to a flexible battery and a preparation method thereof, relates to the technical field of batteries, and mainly aims to improve the applicability of a lithium ion battery. According to the main technical scheme, the preparation method of the flexible battery comprises the following steps: a flexible frame is arranged at the periphery of a pole group fixing region on the inner surface of a first flexible film layer; a body part of a battery pole group is arranged in the flexible frame; and the inner surface of a second flexible film layer and the inner surface of the first flexible film layer are arranged opposite to each other and sealed to form a flexible wrapping film, the flexible wrapping film wraps the body part of the battery pole group betweenthe inner surface of the first flexible film layer and the inner surface of the second flexible film layer, and an electrical connection terminal part of the battery pole group extends out of the flexible wrapping film. Compared with the prior art, the battery pole group adopts the flexible wrapping film, and the battery pole group is positioned through the flexible frame arranged on the inner surface of the first flexible film layer in the flexible wrapping film, so that a flexible battery can be prepared, and the requirement of flexible electronic equipment for a bendable battery can be met.

The invention discloses a manufacturing method of a high-temperature resistant ternary lithium ion battery, and relates to the technical field of the battery manufacturing. The method comprises the following steps: stirring raw materials, respectively placing the anode raw material and the cathode raw material of the battery in a vacuum planet stirrer after passing the detection, stopping stirringafter the raw materials are stirred into the slurry; coating electrode, placing the stirred raw material into an electrode coating machine, and uniformly coating the slurry on the cathode and anode metal foils of the battery; making electrode plate, rolling the metal foils after coating the slurry, and then slicing and welding to manufacture electrode plates, and baking the electrode plate at high temperature for further use; winding the electrode plate, placing the baked electrode plate into a semi-automatic winding machine to be wound as the battery; shell processing, packaging the batteryafter performing shell punching and trimming on the battery shell material, and then performing corner pressing and pad pasting processing, and performing flaring processing after performing short-circuit detection; injecting liquid; formation processing; and packaging. The high-temperature resistant ternary lithium ion battery prepared through the manufacturing method disclosed by the invention is good in high temperature resistance and high in product percent of pass.