35results about How to "Reduce side effects" patented technology

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 belongs to but not limited to the technical field of electrode materials, and particularly relates to a high-tap-density lithium nickel manganese oxide positive electrode material, a preparation method and a lithium ion battery, the chemical general formula of the high-tap-density lithium nickel manganese oxide positive electrode material is LiNi < 0.5-x > Mn < 1.5-y > M < x > N < y > O < 4 >, 0.1, 0 < = y < lt >; 0.1, M and N are doping elements and comprise one or more of Mg, Co, Al, Zr, W, Sb, Ta and Ti; the material is micron-sized spherical secondary particles formed by stacking and aggregating nano-sized octahedral primary particles, and is uniformly dispersed without agglomeration; the spherical secondary particles are formed by mixing spherical secondary particles with large and small particle size distribution, and the average particle size range of the large particles is 3lt; d < 50lt >; the average particle size range of the small particles is 1lt; d < 50lt >; 2 [mu] m.

The embodiment of the invention provides a winding type electrode body and a battery. The wound electrode body comprises a positive plate, a negative plate and a diaphragm which are arranged in a laminated manner. Along the first direction Z, the positive current collector is provided with a first surface and a second surface which are oppositely arranged; the first surface is provided with a first paste coating area and a first empty foil area positioned at the tail part of the positive electrode current collector, and the second surface is provided with a second paste coating area and a second empty foil area positioned at the tail part of the positive electrode current collector. The positive electrode active material layer includes a first positive electrode active material layer disposed on the first paste region and a second positive electrode active material layer disposed on the second paste region. At least part of the first empty foil area is provided with first termination glue, the distance between the side edge, close to the first positive electrode active material layer, of the first termination glue and the edge, close to the first termination glue, of the first positive electrode active material layer is d1, and d1 is larger than or equal to 0. The positive electrode active material layer comprises a positive electrode active material, the positive electrode active material is a Li [Ni < x > Co < y > Mn < z > M < 1-x-y-z >] O < 2 > ternary material, and M is a metal element doped in the ternary material.

The invention discloses a magnesium ion-containing water-alcohol mixed electrolyte and application, the electrolyte comprises a solvent, magnesium salt and an additive, the solvent is a mixed solvent of water and alcohol organic matters, the additive is water-soluble carboxylic acid, and the volume molar concentration of the additive is 0.01-2 mol / L. The electrolyte has a wide electrochemical stability window and high ionic conductivity, the adopted raw materials are safe and easy to obtain, the preparation method is simple, the cost is low, and large-scale batch production is facilitated. The electrolyte is applied to a secondary battery containing magnesium ions.

The invention relates to a lithium ion battery and electronic equipment. The lithium ion battery comprises a positive plate and an electrolyte, the positive plate comprises a positive current collector and a positive active material layer arranged on at least one surface of the positive current collector, and the positive active material layer comprises a positive additive; the electrolyte comprises a sulfur-containing additive and 1, 3-propane sultone, (X + Y) / (W * A) > = 0.025; wherein the mass percentage content of the sulfur-containing additive in the electrolyte is X%; the mass percentage content of the 1, 3-propane sultone in the electrolyte is Y%; the mass percentage content of the positive electrode additive in the positive electrode active material layer is W%; the specific surface area of the positive electrode additive is A m < 2 > / g. According to the scheme provided by the invention, the lithium ion battery can present excellent first coulombic efficiency, high-temperature cycle performance, high-temperature storage performance and low-temperature cycle performance.

The invention discloses a multi-metal co-doped and coated positive electrode material as well as a preparation method and application thereof. The positive electrode material comprises a substrate and a coating layer located on the surface of the substrate, and the substrate is a lithium-containing layered oxide. The coating layer is an alkali metal-based layered oxide heterostructure layer containing high-valence metal formed by ion doping and structural reconstruction of lithium-containing layered oxide, alkali metal ions A < n + > and high-valence metal ions B < n + > with valence larger than or equal to 3, internal and external structure lattices are coherent, and no obvious interface exists. The multi-metal co-doped and coated positive electrode material prepared by the invention has excellent cycling stability, rate capability and conductivity; and the preparation method is simple and efficient, and is easy for large-scale production.

The application relates to a low-eutectic solvent-based gel electrolyte, a preparation method and a zinc-air battery, and belongs to the technical field of metal-air batteries. Choline chloride and 2-methyl-1,3-propanediol are prepared into a deep eutectic solvent, then zinc acetate dihydrate solution, acrylic acid monomer, a crosslinking agent and a photoinitiator are sequentially added, the mixture is uniformly mixed, photopolymerization is carried out, and a low-eutectic solvent-based gel is obtained. The electrolyte is obtained by soaking the gel in a mixed solution of potassium hydroxide and zinc salt. The zinc anode protection capability and the low-temperature adaptability of the gel electrolyte can be improved. The gel electrolyte is assembled into a zinc-air battery together with a zinc electrode and an air electrode, and the cycle life and the operation stability of the battery in a low-temperature environment can be effectively improved.

The invention relates to the field of chemical reaction kettles, and particularly provides a chemical reaction kettle capable of rapidly cooling in chemical production. The device comprises a reaction kettle, the reaction kettle comprises a kettle body, a reaction bin is formed in the kettle body, a cooling mechanism and a transmission mechanism are arranged, a cooling ring is arranged on the inner wall of the reaction kettle, a spiral coil is embedded in the reaction kettle, and the reaction kettle is connected with an external cooling source such as liquid nitrogen through a liquid inlet hose and a liquid outlet hose at the top; the inner side of the cooling ring is also provided with a conduction sheet made of a copper-aluminum alloy material, and the material is good in heat conductivity and low-temperature resistant, so that cold energy in the spiral coil pipe can be efficiently transferred to materials in the reaction bin, and the materials are ensured to be kept in a stable low-temperature state in the reaction process; and the magnetic rings in the transmission mechanism are matched, so that the cooling position is flexibly adjusted, and the cooling effect is optimized.

The invention discloses a soft carbon coated sulfur-nitrogen co-doped coal-based hard carbon material and a preparation method thereof.The preparation method comprises the steps that firstly, bituminous coal powder and thiourea particles are dissolved in absolute ethyl alcohol, fully stirred and mixed to be uniform, and after drying, bituminous coal-thiourea mixed powder is prepared; carrying out primary carbonization treatment on the bituminous coal-thiourea mixed powder in an inert atmosphere to prepare a sulfur-nitrogen co-doped coal-based hard carbon material; and depositing asphalt on the surface of the sulfur and nitrogen co-doped coal-based hard carbon material, and carrying out secondary carbonization treatment on the product to prepare the soft carbon coated sulfur and nitrogen co-doped coal-based hard carbon material, a sodium ion battery based on the soft carbon coated sulfur-nitrogen co-doped coal-based hard carbon material has high sodium storage specific capacity and first coulombic efficiency and high potential platform area sodium storage capacity proportion.

The application discloses a kind of anti-fake color-changing ink and printing process for flat paper to print two-dimensional code, belong to the technical field of ink for anti-fake.The anti-fake color-changing ink according to weight fraction, including: acrylic emulsion 35-40 parts, polyurethane emulsion 15-20 parts, bisphenol A type epoxy resin 5-8 parts, thermochromic material 6-10 parts, hydrogel coated thermochromic material 2-5 parts, temperature-sensitive color-changing capsule 5-8 parts, scratch-resistant additive 2-3 parts, first coupling agent 1-2 parts, second coupling agent 1-2 parts, leveling agent 0.5-0.8 parts, defoaming agent 0.3-0.5 parts, stabilizer 0.5-0.8 parts, first crosslinking agent 2-3 parts, methylsilane 1-2 parts, wax emulsion 1-2 parts, wetting agent 2-3 parts, preservative 0.1-0.5 parts and deionized water 15-20 parts;The hydrogel coated thermochromic material is acrylamide-based hydrogel coated thermochromic material.The anti-fake color-changing ink can simultaneously realize the promotion of anti-precipitation, high adhesion, scratch resistance, high-temperature aging resistance by the synergy of hydrogel coated thermochromic material and scratch-resistant additive.

The present application relates to the field of polymer manufacturing, and particularly relates to a long-chain branched modification method of rare earth isoprene rubber and / or butadiene rubber, comprising the following steps: S1. performing solution polymerization of isoprene and / or butadiene and isoprene in a non-polar solvent in the presence of a rare earth catalyst to obtain a glue solution containing active polymer molecular chains; S2. when the conversion rate of the polymerization reaction reaches 95% or more, adding a compound branched modifier to the glue solution to perform a branched reaction; wherein the compound branched modifier comprises at least one of a chloride and an alkyl halide and at least one selected from ether compounds and tertiary amine compounds. The branched modifier used in the present application has a strong branching effect, and has good solubility so as to achieve uniform mixing at a molecular level in the glue solution, significantly alleviates the gel side reaction, reduces the gel content, narrows the molecular weight distribution, significantly improves the raw rubber performance, and improves the product uniformity.

The present invention pertains to a negative electrode for a lithium secondary battery, a method for manufacturing same, and a lithium secondary battery including same. More specifically, the negative electrode for a lithium secondary battery according to the present invention has a protective layer containing a three-dimensional structure composed of metal and lithium nitride, and thus uniform ionic conductivity and electrical conductivity can be induced on the surface of the negative electrode.

The invention specifically discloses an electrolyte and a lithium ion battery. The electrolyte comprises an electrolyte for first injection and an electrolyte for second injection, the first injection electrolyte comprises a first solvent, a first additive and a first lithium salt; the first solvent comprises dimethyl carbonate, the first additive comprises vinylene carbonate and a composite additive, and the composite additive comprises at least one of fluoroethylene carbonate, ethylene sulfate and methylene methanedisulphonate; the mass ratio of the dimethyl carbonate is 45%-50%; the secondary injection electrolyte comprises a second solvent, a second additive and a second lithium salt; the second solvent comprises dimethyl carbonate, and the second additive comprises vinylene carbonate; the mass ratio of the dimethyl carbonate is 45%-50%; the mass ratio of the vinylene carbonate is 15%. The lithium battery has the advantages of high energy density and long cycle performance.

The invention relates to a synthesis method of ammonium iminodisulfonate and application of the ammonium iminodisulfonate in cyanide-free silver plating, belongs to the technical field of compound preparation, and solves the problems that an existing melting preparation method of the ammonium iminodisulfonate is low in safety, and a prepared product is poor in quality and consistency and low in yield. The method for synthesizing the ammonium iminodisulfonate comprises the following steps: adding ammonium sulfamate and sulfamic acid into a reaction solvent, heating and reacting. The reaction solvent not only promotes the material mixing uniformity and improves the reaction efficiency, but also can disperse part of reaction heat into the solvent through heat conduction and dissipate the heat through heat exchange, so that the intensity of reaction heat release is greatly relieved, the reaction safety is improved, side reactions are reduced, the product yield and quality are improved, and large-scale production can be realized. When the prepared iminodisulfonic acid ammonium salt is applied to cyanide-free silver plating, the stability of a plating solution and the appearance, glossiness, corrosion resistance and other performance of a plating layer are improved.

The present disclosure provides a design and synthesis of a useful carbon skeleton, a design and synthesis of a peptidomimetic molecule and applications and uses based thereon. More particularly, provided is a method for designing a compound skeleton with a desired structure, said method comprising, with the use of a computer: (1) a step for generating a molecular formula of a carbon-containing compound; (2) a step for randomly synthesizing molecules using the adjacency matrix and extracting compounds that correspond to the molecular formula among the randomly synthesized molecules; and (3) a step for selecting a compound that satisfies preset conditions.

The invention discloses a method and device for improving the charging efficiency of an electric bicycle battery, and relates to the technical field of electric bicycle charging, and the method comprises the steps: enabling a charger MCU to enter a corresponding battery charging stage according to the current electric quantity of a battery after the charger is connected to the battery, sequentially entering the next battery charging stage according to a specified sequence until the charging is completed; and when the battery enters a trickle charging stage, the MCU of the charger starts a micro-pulse strategy, so that the charger outputs a target charging voltage and an instantaneous current meeting a certain pulse frequency, and the target charging voltage and the instantaneous current are used for de-vulcanization of the battery. The side reaction of the negative electrode of the battery in the charging process is eliminated through high voltage and instantaneous large current generated in the trickle charging stage, so that the service life of the battery is prolonged, and the driving mileage is prolonged.

The application discloses a composite diaphragm for lithium ion batteries, a preparation method of the composite diaphragm and a lithium ion battery. The composite diaphragm comprises a porous base diaphragm, a first microcapsule coating layer coated on a first surface of the porous base diaphragm and a second microcapsule coating layer coated on a second surface of the porous base diaphragm. The first microcapsule is composed of a lithium source compound core material and a polymer wall material coated outside the lithium source compound core material, and the second microcapsule is composed of a lithium-poor active material core material and a polymer wall material coated outside the lithium-poor active material core material. The softening temperature of the polymer wall material is in the range of 90 DEG C to 230 DEG C. When the temperature of the battery reaches a set trigger temperature, the lithium source compound on the first surface side releases lithium to be inserted into a delithiated positive electrode to reduce the positive electrode potential, and the lithium-poor active material on the second surface side releases lithium to be inserted into a lithium-inserted negative electrode to increase the negative electrode potential, so that the battery state of charge is reduced, and chemical intervention is completed before thermal runaway.

The invention discloses a preparation method of a 5-hydroxymethylfurfural aqueous solution, which comprises the following steps: directly mixing a solid-phase reaction system containing glycosyl biomass and a catalyst with an organic solvent phase, reacting in a reactor in a grinding state, and generating 5-hydroxymethylfurfural from the glycosyl biomass under the action of the catalyst, 5-hydroxymethylfurfural is transferred into an organic solvent phase in the ball milling process. And after the reaction, extracting the organic solvent phase after the reaction by using water as an extracting agent to obtain an aqueous solution of 5-hydroxymethylfurfural. The almost anhydrous reaction condition can effectively inhibit the generation of side reaction of the 5-hydroxymethylfurfural, the 5-hydroxymethylfurfural generated in the solid phase enters the organic solvent phase in time, the reaction selectivity is improved, the energy consumption in the production process is reduced, the aqueous solution of the 5-hydroxymethylfurfural is obtained through the aqueous phase extraction, and the method has the advantages of simple operation and low cost. High-energy-consumption operation processes such as reduced pressure distillation are not needed, and the organic solvent can be recycled.

The utility model discloses an automatic medicine dispensing device of an analgesia pump, which comprises a hundred-level laminar flow, a liquid preparation table, an ampoule liquid pumping table, an ampoule placing table, an analgesia pump head placing groove, a rolling pump, a solution mixer and a control panel, the whole exterior of the liquid preparation table is composed of a glass protective cover, the ampoule liquid pumping table is arranged below the pre-filled preparation liquid bag, and the ampoule placing table is arranged below the ampoule liquid pumping table. The automatic medicine dispensing device of the analgesia pump is provided with relatively sealed hundred-level laminar flow, a clean configuration environment can be provided, and the risk of liquid medicine pollution is reduced; according to the device, the ampoule bottle is automatically broken, manual breaking is not needed, and medical staff injury caused by manual operation is reduced; according to the device, liquid medicine and normal saline are fully and uniformly mixed, the postoperative analgesic effect of a patient is achieved, and the side reaction of medicine is relieved.

The present invention belongs to the technical field of polymer materials, and provides a modified polyurea resin for electrode plates, a preparation method and application thereof, a binder, an electrode plate, a preparation method of an electrode plate, and a lithium battery. The modified polyurea resin for electrode plates provided by the present invention uses a water-based polyurea resin containing carbon-carbon double bonds as the main chain, and connects acrylonitrile graft units, acrylic acid graft units and organic siloxane units containing carbon-carbon double bonds on the main chain through chemical bonds. The modified polyurea resin for electrode plates provided by the present invention is further used as a binder to prepare negative electrode plates, thereby enhancing the mechanical strength of the negative electrode plates, effectively inhibiting the volume expansion of silicon particles, buffering the mechanical stress during the volume expansion of silicon, and significantly improving the cycle performance of lithium batteries. There are very obvious improvements in peel strength, first coulomb efficiency, full charge expansion and cycle retention rate, effectively extending the service life of lithium batteries and improving the safety performance of lithium batteries.

The invention relates to the technical field of battery materials, in particular to a hydrophobic aramid fiber coating liquid for a lithium ion battery, a coating diaphragm and a preparation method of the hydrophobic aramid fiber coating liquid for the lithium ion battery, and the preparation method comprises the following steps: carrying out condensation polymerization on a biphenyl ring aromatic diamine monomer and isophthaloyl dichloride in an organic solvent, neutralizing and defoaming to obtain a DPMIA polymer liquid; the preparation method comprises the following steps: carrying out condensation polymerization on an m-phenylenediamine monomer and isophthaloyl dichloride in an organic solvent, neutralizing and defoaming to obtain a PMIA polymer solution; and mixing the DPMIA polymerization liquid and the PMIA polymerization liquid, and adding an organic solvent for dilution to obtain the coating liquid. And uniformly coating a base membrane with the coating liquid, carrying out coagulating bath forming, washing with water, drying, sizing and rolling to prepare the hydrophobic aramid fiber coated diaphragm. The coating liquid can greatly reduce the off-machine moisture of a coated diaphragm, accelerate the on-machine coating speed of aramid fibers, reduce the drying temperature of a drying section, shorten the drying time, reduce the energy consumption and simultaneously show the advantage of low-temperature discharge.

This invention relates to the field of organic synthesis technology, and discloses a copper-based catalyst, its preparation method, and a method for catalyzing the preparation of cyclododecanol from cyclododecanol into cyclododecanone. The preparation method of the copper-based catalyst includes the following steps: preparing a catalyst with a specific surface area of ​​200-250 m² / g. 2 / g Al2O3-SiO2 composite support; copper source and rare earth oxide additives were loaded onto the Al2O3-SiO2 composite support, dried and calcined to obtain catalyst precursor; the catalyst precursor was reduced to prepare Cu + A copper-based catalyst with a molar ratio of 1.8 to 2.5:1 to elemental copper. This invention can control the Cu content in the copper-based catalyst. + The molar ratio with elemental copper allows the catalyst's activity state to be adjusted according to different production needs, thereby enabling flexible control of the reaction rate, improving process adaptability and operational stability; at the same time, it helps to suppress side reactions and improve the selectivity and purity of cyclododecanone.

The invention discloses a parameter control method for production of a high-purity lithium battery electrolyte, which comprises the following steps of: pretreating raw materials, namely treating a lithium salt, an organic solvent and an additive; meanwhile, the raw materials are subjected to vacuum drying treatment; in the electrolyte synthesis reaction process, the reaction temperature is set according to different reaction stages, and the temperature is controlled within a preset temperature range; adjusting the pressure in the reaction kettle according to the reaction stages of different time periods, and controlling the pressure within a preset pressure range; different stirring speeds are set in different reaction stages, so that the materials are uniformly mixed; removing residual moisture and small molecular impurities by using a molecular sieve adsorption device; and performing quality detection on the finished product, and performing feedback adjustment on production process parameters according to a detection result. The raw materials are pretreated to guarantee the purity, the reaction conditions are controlled to guarantee the purity of the electrolyte, and the purity is improved by means of removing impurities; reasonable parameter setting improves efficiency, reduces cost, stabilizes parameters and saves equipment expenditure.

The invention relates to a surface treatment method of an O3-type nickel-based sodium ion battery positive electrode material, a positive electrode material and a battery, the O3-type nickel-based sodium ion battery positive electrode material is placed in an organic acid for reaction, then sintering treatment is performed, and the positive electrode material after surface treatment is obtained; the chemical general formula of the O3 type nickel-based sodium ion battery positive electrode material is Naa [NibMncMed] O2 + e, and Me is one or a combination of more of transition metals Ni, Fe, Mn, Co, Ti and Cr; a, b, c, d and e respectively correspond to the molar ratio percentages of the elements; a is larger than or equal to 0.8 and smaller than or equal to 1, b is larger than or equal to 0.3 and smaller than or equal to 0.9, and c is larger than or equal to 0 and smaller than or equal to 0.5, 0lt; d < = 0.33,-0.02 < = e < = 0.02; the organic acid is at least one of benzoic acid, acetic acid, citric acid, decanoic acid and tartaric acid; the O3 type nickel-based sodium-ion battery positive electrode material with a stable surface structure can be obtained on the basis that the electrochemical performance of the material is not affected, the battery positive electrode material treated in the manner can be applied to batteries, and the cycling stability and the rate capability are improved.

The invention relates to the technical field of catalysts, and discloses a nano nickel-based catalyst as well as a preparation method and application thereof. The nano nickel-based catalyst comprises a carrier, a main active component and an auxiliary active component, the carrier contains at least two of SiO2, MgO, TiO2, Al2O3 and ZrO2, the main active component is nickel, and the auxiliary active component is at least one of Ag, Pd, Pt, Mo, W, Fe and Cu; based on the total weight of the nano nickel-based catalyst, the content of the main active component is 15-60%, the content of the auxiliary active component is 0.01-0.2%, and the balance is the carrier. The nano nickel-based catalyst has excellent hydrogenation activity and selectivity under mild reaction process conditions, the conversion rate of 4, 4 '-dinitrodiphenyl ether can reach 100%, the selectivity of 4, 4'-diaminodiphenyl ether can reach 99.8%, the single-pass yield of the target product is high, side reactions are extremely few, the stability is high, the conversion rate is still 99.9% or above after the reaction is performed for 1000 h, and the catalyst is suitable for industrial production. And the selectivity can still be maintained at 99.5% or above.

The present invention discloses a low-temperature high-power ternary positive electrode material and a preparation method thereof, belonging to the technical field of lithium-ion batteries. The preparation method of the low-temperature high-power ternary positive electrode material comprises the following steps: uniformly mixing a ternary precursor, a lithium salt, magnesium chromate, and lithium titanium zirconium phosphate to obtain a mixed material; sintering the mixed material in an oxygen-containing atmosphere, and crushing the sample after sintering to obtain a crushed material; finally, coating the outer surface of the crushed material in layers to form an aluminum fluoride layer and a boron oxide layer to obtain a target product. The present invention improves the low-temperature performance and rate performance of the material by adding magnesium chromate and lithium titanium zirconium phosphate; the present invention utilizes a double-layer coating of boron oxide and aluminum fluoride to increase the power of the battery; in addition, the method of the present invention has simple preparation process and low energy consumption, and is suitable for industrial large-scale production.

The invention provides high-transparency light-color heat-resistant copolyester and a preparation method thereof. The preparation method comprises the following steps: carrying out esterification on dibasic acid and dihydric alcohol, and / or carrying out transesterification on dimethyl ester of the dibasic acid and dihydric alcohol to obtain an esterified substance and / or a transesterified substance; carrying out a pre-polycondensation reaction on the esterified product and / or the ester exchange product to obtain a prepolymer; and performing final polycondensation reaction on the prepolymer to obtain the target copolyester. According to the method, a licorice antioxidant and rosemary extract composition is added for esterification and / or transesterification. According to the method, the crystal structure of a copolyester reactant can be adjusted, the light transmittance of the copolyester can be improved, the haze can be reduced, the effect of side reaction at high temperature can be weakened, and the color production problem can be weakened.

The invention discloses a preparation method of a composite polyurea coating with a metal concentration gradient. The preparation method comprises the following steps: firstly, screening a positive electrode material until particles are uniform; then putting the screened positive electrode material into a molecular layer deposition cavity for preheating, so that the positive electrode material is preheated to the temperature the same as that of the cavity; adding a required precursor; preheating until all the precursors reach a target temperature; and finally, performing molecular layer deposition on the positive electrode particles on the positive electrode material according to the sequence of a high metal concentration layer, a middle metal concentration layer and a low metal concentration layer, or in the opposite sequence, namely the sequence of the low metal concentration layer, the middle metal concentration layer and the high metal concentration layer, so as to obtain the composite polyurea coating with the metal concentration gradient. The invention further discloses application of the composite polyurea coating with the metal concentration gradient. According to the invention, the problem that continuous change of concentrations of different components in the coating of the positive electrode material in the prior art is difficult to realize is solved.

The invention is suitable for the field of battery cell manufacturing, and provides a battery cell formation method and device, electronic equipment and a computer program product.The method comprises the steps that a liquid-injected battery cell is charged with first set current till the charging voltage reaches first cut-off voltage; the first set current is greater than or equal to a preset current; at a first set temperature, standing the liquid-injected battery cell for a first set time length; the first set temperature is greater than or equal to a preset temperature; carrying out complete discharge treatment on the battery cell subjected to liquid injection; adopting a second set current to charge the battery cell filled with the liquid until the charging voltage reaches the first cut-off voltage to obtain a target battery cell meeting the set requirement; the second set current is smaller than the preset current; the set requirements include that the skeleton structure of the SEI film of the target battery cell meets the set structural characteristics, and / or the compactness of the SEI film meets a threshold value. According to the scheme, the high-temperature performance of the battery cell can be improved.

The invention discloses a process for preparing a high-purity sodium ion aqueous solution through closed cycle, and belongs to the technical field of inorganic ion liquid preparation. The preparation method comprises the following steps: taking pure water dissolved sodium fluoride as an initial system, and adding metal calcium to react to generate superfine calcium fluoride precipitate and primary sodium ion water; subsequently, the sodium ion water is used as circulating mother liquor to completely replace pure water, and sodium fluoride and metal calcium are continuously supplemented to carry out closed cycle reaction. Fluorine ions and calcium ions are directionally combined and precipitated, sodium ions are continuously enriched in a liquid phase, the concentration is continuously increased along with the number of cycles, the system is always kept in a flowable liquid state, and side reaction of calcium and water can be inhibited due to reduction of water activity. The method breaks through the upper limit of the solubility of the traditional sodium salt, the ultrahigh-concentration sodium ion mother liquor can be obtained, the finished product can leave a factory after being diluted, the mother liquor can be recycled permanently, and the method has the advantages of high reaction efficiency, high raw material utilization rate, no waste liquid discharge, suitability for continuous industrial production and the like; the obtained product can be widely applied to the fields of skin care, moisture preservation, mucous membrane care, whole body electrolyte supplement and the like.