92 results about "Ethyl propionate" patented technology

The invention provides a secondary battery and electronic equipment, the secondary battery comprises a negative electrode plate and an electrolyte, the negative electrode plate comprises a negative electrode active material layer, the negative electrode active material layer comprises graphite and a silicon carbon material, and the average sphericity of the silicon carbon material is 0.81-0.95; the electrolyte comprises ethylene carbonate, propylene carbonate, ethyl propionate and propyl propionate, based on the mass of the electrolyte, the mass percentage content of ethylene carbonate is a%, the mass percentage content of propylene carbonate is b%, the mass percentage content of ethyl propionate is c%, the mass percentage content of propyl propionate is d%, and the range of (a + b) / (c + d) is 0.23-1.51. According to the invention, the discharge performance and the safety performance of the secondary battery at low temperature can be improved.

The invention provides an electrolyte, an electrochemical device and an electronic device, and belongs to the technical field of energy storage. Based on the mass of the electrolyte, the electrolyte comprises ethylene carbonate with the mass content of A%, methyl propyl carbonate with the mass content of B%, diethyl carbonate with the mass content of C%, ethyl propionate with the mass content of D% and propyl propionate with the mass content of E%; wherein 5 < = A < = 20, 10 < = B < = 20, and 0.1 < = A / (B + C + D + E) < = 0.5. By controlling the components and the mass content of the electrolyte, the components are matched with one another, so that the high-temperature cycle capacity retention ratio of the battery can be improved, the increase of the thickness of the battery in a high-temperature and high-humidity storage environment is controlled, the service life of the battery is prolonged, and the use safety of the battery is improved.

The invention relates to the technical field of batteries, in particular to a battery. The battery comprises a positive plate, a negative plate, electrolyte and a diaphragm located between the positive plate and the negative plate, the diaphragm comprises a base material and a ceramic layer located on the surface of one side or two sides of the base material, the ceramic layer comprises inorganic particles, the ceramic layer is of a porous structure, the porous structure comprises holes with the diameter larger than or equal to 0.5 micrometer, and the inorganic particles are distributed in the range of 100 micrometers * 100 micrometers randomly selected on the surface of the ceramic layer. The number of the holes with the diameter larger than or equal to 0.5 micrometer is 10-800, and the coverage rate A1 of the holes with the diameter larger than or equal to 0.5 micrometer in the surface of the ceramic layer is 10%-50%; the electrolyte comprises an organic solvent, and the organic solvent comprises at least two of dimethyl carbonate, ethyl methyl carbonate, propylene carbonate, ethylene carbonate, diethyl carbonate, propyl propionate, ethyl propionate and ethyl acetate. The battery disclosed by the invention can have relatively high quick-charge cycle performance and rate capability under the condition that the safety performance is not influenced.

In general, according to one embodiment, a secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The nonaqueous electrolyte includes a nonaqueous solvent and an electrolyte. The nonaqueous solvent includes a first solvent including at least one selected from the group consisting of ethyl propionate, propyl propionate and ethyl butyrate, and a second solvent including γ-butyrolactone. The electrolyte includes lithium bisfluorosulfonylimide.

The invention discloses a production and processing device of ethyl dicyanopropionate and a processing method thereof, relates to the technical field of chemical production, and aims to solve the technical problem that a traditional stirring method cannot realize overall uniform mixing of mixed liquid according to density and viscosity, and the production and processing device comprises a tank body, a stirring mechanism, a turnover assembly and a defoaming unit. According to the stirring mechanism, the rubber rod is bent under the action of centrifugal force, the stirring area is enlarged, the mixing efficiency above the stirring cavity is improved, and different working conditions are adapted; the overturning assembly pushes the middle mixed liquid to uprush by utilizing a rubber barrel which is pressed to be concave inwards, so that segmented stirring is realized, and the mixing effect is enhanced by vibration force generated by contact between a rubber rod and a concave part; the defoaming unit enables foams to flow into a bearing ring to be defoamed by means of centrifugal force of mixed liquid, and a fixing cylinder, a spring and an extrusion block guarantee defoaming stability; the whole device is compact in structure, components are coordinated, operation is easy and convenient, and the standard processing method assists in improving the production quality and efficiency of ethyl dicyanopropionate.

The embodiment of the invention relates to a secondary battery, a battery pack and a vehicle. The present invention addresses the problem of providing a secondary battery, a battery pack, and a vehicle having excellent high-current performance, low-temperature performance, and high-temperature life performance. According to one embodiment, a secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte is provided. The non-aqueous electrolyte contains a non-aqueous solvent and an electrolyte containing lithium bis (fluorosulfonyl) imide, and the non-aqueous solvent contains a first solvent comprising at least one selected from the group consisting of ethyl propionate, propyl propionate, and ethyl butyrate, and a second solvent containing gamma-butyrolactone.

The invention provides an electrolyte for a ternary positive electrode secondary battery, the electrolyte is used for a secondary battery with a positive electrode active material being LiNixCoyMnzO2, x, y and z respectively represent molar fractions of nickel, cobalt and manganese, x + y + z = 1, and the electrolyte comprises carbonic ester, ethyl propionate, a lithium salt, an organic silicon additive and a lithium acesulfamide additive. According to the electrolyte and the secondary battery, the high-voltage performance can be improved.

The invention discloses a low-temperature electrolyte for a laminated soft-package lithium ion battery, the lithium ion battery and a preparation method of the lithium ion battery. Comprising the following components: 4%-6% of propylene carbonate, 9%-11% of diethyl carbonate, 30%-32% of methyl ethyl carbonate, 24%-26% of ethylene carbonate, 9%-11% of ethyl propionate, 14%-16% of electrolyte salt and 3.6%-4.0% of an additive, according to the low-temperature electrolyte and the lithium ion battery, the solvent and the additive of the electrolyte are optimally combined, so that the obtained electrolyte has the characteristics of high conductivity and low impedance at low temperature, the low-temperature charge-discharge performance of the lithium ion battery can be remarkably improved, in addition, the obtained low-temperature electrolyte and the lithium ion battery have wide application prospects, and the application prospect is wide. And the method is especially suitable for the field with high low-temperature performance requirements.

The invention relates to the field of plant extraction, and particularly discloses a green tea polyphenol extraction method, which comprises: S1, washing a green tea raw material with acid water, separating with macroporous resin, and eluting with ethanol to prepare a tea polyphenol extraction liquid; s2, enabling the prepared tea polyphenol extracting solution to firstly pass through a cellulose column filled with a cellulose filler prepared by taking epicatechin as a template agent molecule, and then eluting with ethyl propionate to prepare an EC extract; s3, enabling the tea polyphenol extracting solution passing through the cellulose column to pass through a modified PCL-PHEMA copolymer resin column containing ether bonds, and then eluting by adopting an ethanol solution to prepare the EGCG extract. The method has the characteristics that tea polyphenol extraction of green tea is realized, and EGCG and EC separation and extraction are further realized.

The invention relates to a production method of quizalofop-p-ethyl, which comprises the following steps: reacting 2-(4-hydroxyphenoxy) propionic acid with absolute ethyl alcohol to obtain ethyl 2-(4-hydroxyphenoxy) propionate, and replacing the original process of reacting p-toluenesulfonyl chloride with L-ethyl lactate to obtain an intermediate, namely ethyl p-toluenesulfonyl lactate, with a process of reacting 2-(4-hydroxyphenoxy) propionic acid with absolute ethyl alcohol to obtain ethyl 2-(4-hydroxyphenoxy) propionate; meanwhile, in the post-treatment method, centrifugal separation replaces plate-and-frame pressure filtration, closed-circuit flash drying replaces original rake drying, racemization of quizalofop-p-ethyl is effectively avoided, the optical purity and yield of quizalofop-p-ethyl are improved, and the environmental protection benefits of the process are improved. Experiments show that the optical purity of the quizalofop-p-ethyl produced by the method provided by the invention is 99% or above, the yield is 98% or above, and the method is suitable for industrial production.

The invention provides a non-aqueous electrolyte, an electrochemical device and an electronic device. The non-aqueous electrolyte comprises ethylene carbonate, propylene carbonate, propyl propionate and ethyl propionate, and based on the total mass of the non-aqueous electrolyte, the mass contents of ethylene carbonate, propylene carbonate, propyl propionate and ethyl propionate are respectively A%, B%, C% and D%, 5 < = A < = 15, 5 < = B < = 15, 30 < = C < = 50, 5 < = D < = 20, A > = B, 2 < = C / D < = 3.5. When the electrochemical device contains the non-aqueous electrolyte, the cycle performance of the electrochemical device at normal temperature can be improved on the basis of considering the high-temperature performance of the electrochemical device.

The application provides a flavor composition for electronic cigarettes, electronic cigarette liquid and a preparation method thereof. The flavor composition for electronic cigarettes comprises 0.1-0.4 parts of ethyl isovalerate, 2.0-5.0 parts of isoamyl acetate, 0.1-0.6 parts of ethyl butyrate, 0.4-1.6 parts of ethyl acetate, 0.1-0.6 parts of propyl acetate, 0.1-0.6 parts of myric aldehyde, 0.05-0.3 parts of malic acid liquid and 0.02-0.1 parts of acetic acid liquid. By adjusting the ratio of the flavor composition, the application makes the flavor composition have strawberry flavor, can restore the pure fruit pulp aroma of strawberries, has high restoration degree of strawberry flavor, long aftertaste and good stability after high-temperature and high-humidity baking, and can be applied to electronic cigarette liquid, thereby improving the experience of users using electronic cigarettes.

The invention relates to the technical field of microorganisms, in particular to bacillus velezensis utilizing lactic acid and application of the bacillus velezensis in white spirit production. The lactic acid utilization strain obtained through screening has good tolerance, can be applied to Baijiu brewing, can significantly reduce the lactic acid content in the seventh-round fermented grains of Maotai-flavor by about 44.9%, improves the propionic acid and ethyl propionate in Baijiu by about 10.3%, improves the ethyl propionate by about 23.7%, and is stable in effect.

Proposed are preparations comprising (i) a mixture of substances comprising (a) one, two or more compounds selected from the group consisting of (a1) alcohol monoterpenes of the formula (I) where R1 is H or methyl, R2 is H or C2-alkenyl, and R3 is a linear or branched, saturated or unsaturated hydrocarbon radical having 4 to 10 carbon atoms, and their enantiomers, diastereomers, racemates, solvates and physiologically acceptable salts, and / or (a2) bicyclic epoxy monoterpenes, (b) at least two lactones of the formula (II) where R4 is H or methyl, R5 is a linear or branched, saturated or unsaturated hydrocarbon radical having 2 to 10 carbon atoms and n is the number 1 or 2, and their enantiomers, diastereomers and racemates, and (c) one, two or more Solvent selected from the group consisting of ethanol, water, dipropylene glycol (DPG), diethyl phthalate (DEP), propylene glycol (PG),Isopropyl myristate (IPM), isopropyl palmitate (IPP), triethyl citrate (TEC), triacetin (TRI), 1,2-propanediol, 1,3-propanediol, propanetriol, pentanediol, hexanediol, octanediol, decanediol, dodecanol, 4-hydroxyacetophenone, butylene glycol, pentylene glycol, hexylene glycol, decylene glycol, propylene carbonate, butylene carbonate, glycerol carbonate, 2-benzylheptanol, trimethyl hydroxypentyl isobutyrate, glyceryl caprylate, ethylhexylglycerin, benzyl benzoate (BB), and optionally (d) further flavorings or fragrances selected from the group consisting of 3-phenylbutanal, acetylmethylcarbinol, anethole, anisyl acetate, dihydroeugenol, linalyl formate, 2-methyldecanal, 2-Benzyl-2-methylbut-3-ene nitrile, 3-hexenyl acetate, styralyl acetate, citronellal, cinnamyl acetate, rhubafuran, betalonone, anther, prenyl acetate, 2-phenylpropanal, 4-(4-hydroxyphenyl)butan-2-one, ethylphenoxyacetate, isoraldein, gamma-terpinene, Limonene, Neocyclocitral, Methyl Lavender Ketone, Styralyl Propionate, Phenyl Ethyl Propionate, Limonenal,4-Isopentylcyclohexanol, 4-methyl-2-phenyl-3,6-dihydro-2H-pyran / 4-methylene-2-phenyl-tetrahydropyran, hydrocitronitrile, phenoxanol, isoamylphenyl acetate, damascone, silvial, nectaryl, ambroxide, acetylpyrazine, trimethylpyrazine, isoamyl acetate, cresyl methyl ether para, filbertone, cyclohexyl acetate, heliotropin, acetophenone, anisaldehyde, methylacetophenone para, veratraldehyde, methyl anisate and vertoprenal, and (ii) aldehydes of the formula (III) where R6 is a saturated or unsaturated, linear hydrocarbon radical, and / or (iii) free fatty acids of the formula (IV) where R7 is a linear or branched, saturated hydrocarbon radical.

The invention discloses a beverage shashi flavor and a preparation method thereof, and belongs to the technical field of beverage production, wherein the flavor is composed of propylene glycol, wintergreen oil, ethyl salicylate, methyl benzoate, ethyl benzoate, ethyl acetate, ethyl butyrate, ethyl lactate, ethyl levulinate, neryl acetate, sweet orange oil, lemon oil, citral, linalool, nonanal, methylcyclopentenolone, 2-acetylpyrazine, 2,3-dimethylpyrazine, ethyl maltol, maltol, furanone, vanillin, ethyl vanillin, piperonal, anisaldehyde, anisyl alcohol, ethyl damascone, methyl damascone, damascone, furfural and 5-methyl furfural. The formula is based on characteristic aroma as the theme fragrance, with burnt fragrance, burnt sweetness, sugar fragrance, and the base flavor is combined with trace raw materials of fruity fragrance, citrus, vanilla, and fermented fragrance, and the aroma of the flavor finally prepared is pure, comfortable, and realistic, and the mouthfeel is natural, natural, and the aftertaste is long.

The invention provides a secondary battery and electronic equipment, the secondary battery comprises a negative electrode plate and an electrolyte, the negative electrode plate comprises a negative electrode active material layer, the negative electrode active material layer comprises graphite and a silicon carbon material, the average sphericity of the silicon carbon material is m, and the range of m is 0.81-0.95; the electrolyte comprises ethylene carbonate, propylene carbonate, ethyl propionate and propyl propionate, based on the mass of the electrolyte, the mass percentage content of the ethylene carbonate is a%, the mass percentage content of the propylene carbonate is b%, the mass percentage content of the ethyl propionate is c%, the mass percentage content of the propyl propionate is d%, b ranges from 5 to 26, (a + b) / (c + d) ranges from 0.23 to 1.51, and the sum of the mass percentage content of the ethylene carbonate, the mass percentage content of the propylene carbonate, the mass percentage content of the ethyl propionate and the mass percentage content of the propyl propionate is d%. The electrolyte further comprises lithium difluorophosphate, the mass percentage content of the lithium difluorophosphate is n% based on the mass of the electrolyte, and m / n ranges from 3 to 14.5. According to the invention, the discharge performance and the safety performance of the secondary battery at low temperature can be improved.

The invention belongs to the technical field of microorganisms, and relates to saccharomyces cerevisiae with high yield of flower and fruit fragrance and application thereof. The strain is preserved in the China Center for Type Culture Collection, the preservation number is CCTCC M 20242771, the preservation time is December 10, 2024, the strain is separated from the natural fermentation process of blueberries in Danzhai region of Guizhou province, and the strain has excellent brewing characteristics including high ethanol (13.6% vol) and glycerol (7.48 g / L) yield, low hydrogen sulfide yield, positive killing and the like. When the strain is used for blueberry wine fermentation, the flower fragrance of an obtained blueberry wine sample is richer, the anthocyanin content exceeds that of a wine sample fermented by commercial yeast CECA, flavor analysis shows that the strain has obvious advantages in the aspect of producing key aroma compounds such as methyl benzoate, ethyl propionate, phenethyl acetate and beta-damascenone, and the strain has good application prospects. The OAV value of methyl benzoate in a wine sample fermented by the strain is 306.16, the wine can be endowed with more flower fragrance and fruit fragrance such as cherries, and richer fragrance levels are brought to a wine body.

The application belongs to the technical field of electrochemistry and relates to a secondary battery and an electronic device comprising the secondary battery. The secondary battery comprises a positive electrode, a negative electrode, a separator and an electrolyte; the negative electrode active material of the negative electrode comprises a silicon-carbon material; the electrolyte comprises ethyl propionate and propyl propionate, the mass percentage content of the ethyl propionate is a% and the mass percentage content of the propyl propionate is b% based on the total mass of the electrolyte, wherein 1.7<=a / b<=5.7; the electrolyte further comprises at least one of vinylene carbonate, a boron-containing lithium salt and a compound comprising a structure shown in Formula I; wherein A in Formula I is selected from C2 to C5 alkylene. The secondary battery, by improving the used electrolyte system, reduces the gas generated by the secondary battery containing the electrolyte system at high temperature, and further improves the high-rate discharge performance of the secondary battery.

The invention relates to the technical field of batteries, in particular to an electrolyte without ethylene carbonate and a battery. The electrolyte comprises fluoroethylene carbonate, diethyl carbonate, propylene carbonate and a compound A, and the compound A is at least one of ethyl propionate and propyl propionate; based on the total mass of the electrolyte, the mass content w1 of the fluoroethylene carbonate is 10-30%; the mass content w5 of the diethyl carbonate is 5%-25%; the content w6 of the propylene carbonate is 5%-28%; the mass content of the compound A is w2, and w2 is 25%-60%; under the condition that the compound A is a combination of ethyl propionate and propyl propionate, the mass content of ethyl propionate is greater than that of propyl propionate; and 1.04 < = w1 / w5 < = 3.5. Comprising the electrolyte provided by the invention is improved in high-temperature stability, dynamic performance and cycle performance.

The utility model relates to the technical field of reaction kettle discloses a reaction kettle of production ethyl propionate, including kettle body, the kettle body top is provided with the kettle cover, the kettle cover inside fixedly connected with the feed pipe, the kettle cover top is provided with the motor, the motor output fixedly connected with the pivot, the pivot side wall is provided with the adjusting mechanism, the pivot outside is provided with the stirring vane, the kettle cover inside fixedly connected with the exhaust pipe, the exhaust pipe top is provided with quick -release mechanism, the adjusting mechanism includes the fixed peg and the recessed hole of opening in the pivot inside, the fixed peg side wall sliding connection is in the recessed hole inside. In the utility model, by pulling the fixed peg, makes the slip ring to drive the stirring vane and moves up and down along the pivot's axial direction, can according to the height of liquid level or the increase of material viscosity in the reaction process, the immersion depth and the action area of stirring vane are adjusted flexibly, not only has optimized the mass transfer heat transfer efficiency, also avoided the problem of local overheating and reaction uneven.

The utility model relates to the field of ethyl dicyanopropionate, in particular to a rapid purification device which comprises a machine body, a front display controller is fixedly installed outside the machine body, a barrel groove is formed in the upper portion of the machine body, and a first purification barrel is fixedly installed in the barrel groove. An outer temperature sensor is fixedly mounted outside the first purification cylinder, an inner purification cylinder is arranged in the first purification cylinder, and an outer caulking groove is formed in the outer part of the inner purification cylinder. Through the arrangement of the first purification cylinder, the outer temperature sensor, the inner purification cylinder, the electric heating pipe, the spacing cylinder, the second purification cylinder and the filter screen, raw materials entering the first purification cylinder can enable an external operator to firmly grasp the temperature of the inner purification cylinder under the control of the outer temperature sensor; the device can be used for purifying the dicyanoethyl propionate at a proper temperature, and can meet the purification requirements of different dicyanoethyl propionate.

The invention provides a low-energy-consumption production process for esterification synthesis of ethyl propionate. According to the method, propionic acid is added from the middle part or the lower part of an esterification tower, and an ethyl propionate-water-ethanol ternary azeotropic system is broken through the strong association effect of propionic acid and water; in addition, sulfuric acid and propionic acid are fixed at the bottom of the esterification tower and the middle lower part of the esterification tower under the strong complexing action of the acid-binding agent, so that side reaction caused by entrainment of the sulfuric acid and the propionic acid on the upper part of the esterification tower can be reduced; reflux of ethyl propionate at the top of the tower can be effectively reduced by reducing concentration of sulfuric acid and propionic acid at the middle or upper part of the esterification tower, and energy consumption is reduced.

The invention relates to the technical field of edible essence. The invention discloses yoghourt essence and a preparation method thereof. The yoghourt essence is prepared from the following raw materials: ethyl maltol, vanillin, butanedione, acetic acid, ethyl acetate, propionic acid, 2, 3-pentanedione, 3-hydroxy-2-butanone, butyric acid, ethyl butyrate, isoamyl acetate, methyl thiobutyrate, hexanoic acid, ethyl hexanoate, 10% furanone, isoamyl butyrate, ethyl levulinate, linalool, alpha terpilenol, 4-terpinenol, nerol and citral. The invention relates to a natural plant essential oil which is prepared from geraniol, neryl acetate, geranyl acetate, D-limonene, lemon oil, distilled white lemon oil, sweet orange oil, glycerol triacetate, a rosemary extract and a bitter gourd extract. The flavor of the yoghurt essence prepared by the invention is closer to that of real yoghurt, and the yoghurt essence is good in thermal stability and good in flavor durability.

The invention discloses application of a compound to prevention and control of plant pathogenic fungus fusarium oxysporum, and belongs to the technical field of agricultural disease prevention and control. The compound is 3-[1-(1H-benzimidazole-2-yl)-5-hydroxy-3-methyl-1H-pyrazole-4-yl] ethyl propionate. According to the invention, it is found for the first time that the 3-[1-(1H-benzimidazole-2-yl)-5-hydroxy-3-methyl-1H-pyrazole-4-yl] ethyl propionate has a relatively strong inhibition effect on plant pathogenic fungus fusarium oxysporum; experiments show that the compound has a median inhibitory concentration IC50 of 25.2 [mu] g / mL on fusarium oxysporum, and compared with other bactericides, the compound has the advantages of high efficiency, low toxicity and low residue, has better environmental compatibility, and meets the requirements of green plant protection and sustainable agricultural production and the needs of development.

The present invention relates to an electrolyte composition comprising at least a sodium salt dissolved in at least one solvent and a combination of additives, wherein: the solvent is selected from the group consisting of ethylene glycol carbonate, dimethyl carbonate, ethyl methyl carbonate, diethyl carbonate, propylene carbonate, ethyl acetate, ethyl propionate, methyl propionate, 4-fluorotoluene, 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether, difluoroethylene glycol carbonate, ethyl difluoroacetate and mixtures thereof; and the combination of additives comprises at least sodium difluoro(oxalato)borate (NaODFB) and tris(trimethylsilyl)phosphite (TMSPi).

The application discloses a local high-concentration lithium metal battery electrolyte and a preparation method and application thereof. The electrolyte comprises a lithium salt, an organic solvent, an additive and a diluent; the organic solvent comprises at least one of methyl formate, methyl acetate, methyl propionate, methyl butyrate, ethyl propionate, ethyl acetate, ethyl butyrate, methyl trifluoroacetate and ethyl trifluoroacetate; the additive comprises at least one of fluoroethylene carbonate, lithium difluorobisoxalate phosphate and lithium difluorophosphate; and the diluent is a fluorine-containing ether compound. The local high-concentration electrolyte has the advantages of high-voltage resistance of high-concentration electrolyte and inhibition of corrosion of sulfonimide-based electrolyte on aluminum foil, meanwhile, the problems of high viscosity, low conductivity and poor impregnation with a separator of high-concentration electrolyte are overcome, the cycle performance and low-temperature performance of the lithium metal battery are significantly improved, and the local high-concentration electrolyte is particularly suitable for application in a low-temperature high-voltage lithium battery. The preparation method is simple, the cost is low, and the method is suitable for industrial production.

Disclosed in the present application are an electrolyte, a secondary battery and an electronic apparatus. The electrolyte comprises ethylene sulfate and vinylene carbonate, wherein on the basis of the mass of the electrolyte, the mass percentage content of the ethylene sulfate is A% and the mass percentage content of the vinylene carbonate is B%, 0.1≤A / B≤4; the electrolyte at least comprises ethyl propionate and propylene carbonate; the electrolyte further comprises a first substance, wherein the first substance is at least two selected from lithium difluorophosphate, lithium difluoro(oxalato)borate, lithium bis(trifluoromethanesulfonyl)imide or lithium hexafluorophosphate, and at least contains lithium difluorophosphate, and on the basis of the total mass of the electrolyte, the mass percentage content of the first substance is 0.3 wt%-1.2 wt%. In the process of charge and discharge of the secondary battery of the present application, the low-temperature cycle performance and the overcharge prevention capacity under a large current condition of the secondary battery and an electrochemical apparatus can be improved.

The invention belongs to the technical field of fermentation engineering, and particularly relates to Wickerhamomyces anomalus JG-WA1 and application thereof in aroma-enhancing fruit wine. A strain of aroma-enhanced Wickerhamomyces anomalus JG-WA1 is screened from distiller's yeast, apple juice is inoculated with the strain for primary fermentation, then saccharomyces cerevisiae is inoculated for secondary fermentation, and the aroma-enhanced fruit wine is prepared. The content of unpleasant odor substances such as acetone, 4-methyl-1-pentanol, 2-butanol, dimethyl disulfide, 3-hexanone and the like with pungent smell of alcohol or mildew odor and the like in the fruit wine is obviously reduced, while the content of 2-pentanol, ethyl propionate, propyl acetate, 3-methyl-2-pentanone, 3-pentene-2-ketone, hexyl hexanoate, ethyl hexanoate, methyl acetate, heptanal, 2-octanone, 2, 3-pentanone, ethyl hexanoate, ethyl hexanoate, methyl acetate, heptanal, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate and ethyl hexanoate is obviously reduced. The content of fruit flavor components such as 2, 3-dimethylpyrazine is greatly increased, the brewed apple wine is obvious in ester flavor and transparent and bright in color, and the flavor quality is obviously improved.

To provide a secondary battery, a battery pack, and a vehicle with excellent high current performance, low temperature performance, and high temperature life performance.SOLUTION: A secondary battery according to an embodiment includes a positive electrode 3, a negative electrode 4, and a non-aqueous electrolyte. The non-aqueous electrolyte includes a non-aqueous solvent including a first solvent including at least one selected from the group consisting of ethyl propionate, propyl propionate, and ethyl butyrate, and a second solvent including γ-butyrolactone, and an electrolyte including lithium bisfluorosulfonylimide.SELECTED DRAWING: Figure 1

A secondary battery, including a negative electrode plate and an electrolyte, where the negative electrode plate includes a negative electrode active material layer. The negative electrode active material layer includes graphite and a silicon-carbon material, and an average sphericity of the silicon-carbon material is 0.81 to 0.95. The electrolyte includes ethylene carbonate, propylene carbonate, ethyl propionate and propyl propionate, where based on a mass of the electrolyte, a mass percentage of the ethylene carbonate is a %, a mass percentage of the propylene carbonate is b %, a mass percentage of the ethyl propionate is c %, a mass percentage of the propyl propionate is d %, and (a+b) / (c+d) is in a range of 0.23 to 1.51.