Abstract: This application relates to a lithium-ion battery, including a positive electrode, a negative electrode, and an electrolyte, where the negative electrode includes a negative electrode current collector and a negative electrode active material layer containing a negative electrode active material attached to at least one surface of the negative electrode current collector, where an average width-to-length ratio of particles of the negative electrode active material is 0.1-1; an ionic conductivity of the electrolyte is 7-15 mS/cm; and a negative electrode lithiation capacity to positive electrode delithiation capacity ratio CB is 1.05-1.5. An electric apparatus including such lithium-ion battery is also disclosed. The lithium-ion battery has a large-rate fast charging capability and good cycling performance.

Abstract: A battery cell includes an electrolyte, positive and negative electrode plates, and a separator between the positive and negative electrode plates. The electrolyte includes a lithium salt including lithium hexafluorophosphate, a mass percentage of which with respect to a total mass of the electrolyte ranges from 15% to 20%. The positive/negative electrode plate includes a positive/negative electrode current collector and a positive/negative electrode film layer provided on at least one side of the positive/negative electrode current collector and containing a positive/negative electrode active material. The negative electrode active material includes a carbon-based material and a silicon-carbon composite. A mass percentage of silicon in the silicon-carbon composite with respect to a total mass of the negative electrode active material is greater than or equal to 0.3% and less than or equal to 10.0%.

Abstract: This application relates to a lithium-ion battery, a battery, and an electric apparatus. The lithium-ion battery includes an electrolyte and a positive electrode plate. The electrolyte includes lithium salt, the lithium salt includes lithium hexafluorophosphate, and a mass proportion of the lithium hexafluorophosphate relative to a total mass of the electrolyte is 15% to 20%. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer disposed on at least one side of the positive electrode current collector and containing a positive electrode active material. This application can improve cycling performance of the lithium-ion battery.

Abstract: This application relates to a lithium-ion battery, a battery, and an electric apparatus. The lithium-ion battery includes an electrolyte and a positive electrode plate. The electrolyte includes a lithium salt, where the lithium salt includes lithium hexafluorophosphate, and based on a total mass of the electrolyte, a mass proportion of the lithium hexafluorophosphate is 15% to 20%. The positive electrode plate includes a positive electrode current collector and a positive electrode film layer disposed on at least one side of the positive electrode current collector and containing a positive electrode active material. This application can improve cycling performance of the lithium-ion battery.

Abstract: A battery cell includes an electrolyte, positive and negative electrode plates, and a separator provided between the positive and negative electrode plates. The electrolyte includes a lithium salt including lithium hexafluorophosphate, a mass percentage of which with respect to a total mass of the electrolyte ranges from 15% to 20%. The positive/negative electrode plate includes a positive/negative electrode current collector and a positive/negative electrode film layer provided on at least one side of the positive/negative electrode current collector and containing a positive/negative electrode active material. The negative electrode active material contains carbon and silicon. A mass percentage of silicon with respect to a total mass of the negative electrode active material is greater than or equal to 0.3% and less than or equal to 3.0%.

Abstract: An electrolyte includes a first additive having a chemical formula of R((CH3)mSi)n, where R includes at least one of phosphate ester group, phosphite group, borate group, amine group, isocyanate group, fluorine atoms, oxygen atoms, and sulfur atoms, m is 1, 2, or 3, and n is 1, 2, or 3.

Abstract: The present application relates to a lithium ion battery and a power consuming device, the lithium ion battery comprising a positive electrode, a negative electrode and an electrolyte solution, wherein the electrolyte solution has a viscosity c of 1-6 mPa·s at 25° C., as measured in accordance with GB/T10247-2008; and the ratio CB of the lithium intercalation capacity of the negative electrode to the delithiation capacity of the positive electrode is 1.05-1.5. The lithium ion battery has high-rate fast charging capability and good cycling performance.

Abstract: Provided are a secondary battery and a method of preparing the secondary battery. The secondary battery includes a positive electrode plate and an electrolytic solution, wherein the positive electrode plate includes a positive electrode current collector and a positive electrode film layer provided on at least one surface of the positive electrode current collector, the positive electrode film layer has a porosity of P, the electrolytic solution includes a dehydrating additive, and based on a total mass of the electrolytic solution, a mass percentage of the dehydrating additive in the electrolytic solution is a, and the secondary battery satisfies: 0.2?(a*100)/P?3.5. The secondary battery of the present application has improved initial direct current resistance (DCR) and high temperature cycle performance while having an improved porosity to balance high energy density and good dynamics.

Abstract: The present application provides a battery cell, a battery, and an electrical apparatus, the battery cell comprising a positive electrode plate, a negative electrode plate, a separator, and an electrolyte solution. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer arranged on at least one side of the positive electrode current collector. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer arranged on at least one side of the negative electrode current collector. The separator is arranged between the positive electrode plate and the negative electrode plate. The positive electrode active material layer, the negative electrode active material layer, the separator, and the electrolyte solution satisfy a relationship of: 50 ? M? · cm 2 ? T ? 1 P ? 1 + T ? 2 P ? 2 + T ? 3 P ? 3 G ? 300 ? M ? ? · cm 2 .

Abstract: The application provides a secondary battery and a device including the same. The secondary battery includes a negative electrode plate that includes a negative electrode film, where the negative electrode film includes a negative electrode active material; electrolyte that includes an electrolyte salt, an organic solvent and an additive, where the negative electrode active material includes a silicon-based material; the organic solvent includes dimethyl carbonate (DMC); and the additive includes one or more of compound shown in Formula 1 as discloses in the application, where, R1 is selected from one of C2˜C4 alkylene or halogenated alkylene, C2˜C4 alkenylene or halogenated alkenylene, C6˜C18 arylene and derivatives thereof. Under the premise of having a high energy density, the secondary battery and the device including the same according to the application can also have good high-temperature cycle performance and high-temperature storage performance.

Abstract: The present disclosure relates to a lithium-ion battery including a first electrolytic solution and a second electrolytic solution. The first electrolytic solution and the second electrolytic solution satisfies 0.1?[(d2×t2)/(d1×t1)]?11, where d1 is a mass of the first electrolytic solution, d2 is a mass of the second electrolytic solution, t1 is a ratio of a mass of an additive of the first electrolytic solution to a mass of the first electrolytic solution, and t2 is a ratio of a mass of an additive of the second electrolytic solution to a mass of the second electrolytic solution.

Abstract: The present application discloses a lithium-ion battery, which has a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte solution comprising a lithium salt and a solvent, wherein based on the total weight of the electrolyte solution, the percentage by mass of the lithium salt in the electrolyte solution is a %, and the lithium ion battery satisfies 5?a?10; and the load on single side of the negative electrode sheet is W grams per 1540.25 mm2, and a and W satisfy 25?a/W?50; and the solvent comprises dimethyl carbonate. The lithium ion battery has good safety and high-temperature cycling performance, and also has good kinetic performance.

Abstract: Various embodiments provide an electrolyte solution, a secondary battery, a battery module, a battery pack and an electric device. In those embodiments, the electrolyte solution includes an electrolyte, a solvent and an additive, the additive including sodium hydrosulfite. Various embodiments improve an overall performance of the secondary battery, for example, initial DCR, storage gas production, a rate performance, or the like.

Abstract: This application provides a secondary battery and a device comprising the same. The secondary battery includes a negative electrode plate and an electrolyte. The negative electrode plate includes a negative electrode active material. The electrolyte includes an electrolyte salt, an organic solvent, and an additive. The negative electrode active material includes a silicon-based material. The organic solvent includes ethylene carbonate (EC) and diethyl carbonate (DEC). A mass ratio of EC in the organic solvent is less than or equal to 20%, and a mass ratio of DEC in the organic solvent is less than or equal to 20%. The additive includes an additive A and an additive B. The additive A is selected from one or more of compounds represented by Formula 1 or Formula 2, and the additive B is selected from one or more of compounds represented by Formula 3, as described in the application.

Abstract: The present application provides a secondary battery, a battery module, a battery pack, and an electrical device. The secondary battery includes a positive electrode plate and an electrolytic solution; the positive electrode plate including a positive electrode active material; the electrolytic solution includes a boron-containing salt; a mass percentage of the boron-containing salt based on the total mass of the electrolytic solution is denoted as A %; an upper-limit potential of the positive electrode active material with respect to lithium metal is denoted as V1 (V); and the secondary battery satisfies: 0<A/(V1?4.1)?4 and V1>4.1; optionally, 0<A/(V1?4.1)?3. The present application is capable of improving the cycle capacity retention and cycle DCR growth rate of secondary batteries.

Abstract: The present application provides a non-aqueous electrolyte, a secondary battery, and an electrical device. The non-aqueous electrolyte includes at least two of a boron-containing lithium salt additive, a phosphorus-containing lithium salt additive, and a sulfur-containing lithium salt additive; based on a total mass of the non-aqueous electrolyte, a mass percentage of the boron-containing lithium salt additive is A1%; based on the total mass of the non-aqueous electrolyte, a mass percentage of the phosphorus-containing lithium salt additive is A2%; based on the total mass of the non-aqueous electrolyte, a mass percentage of the sulfur-containing lithium salt additive is A3%; and the non-aqueous electrolyte satisfies: 0<A1+A2+A3?3. The present application can improve cycle performance and dynamics performance of the secondary battery.

Abstract: A secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The secondary battery includes a positive electrode plate including a positive electrode film layer, a negative electrode plate including a negative electrode film layer, an electrolytic solution, and a solid electrolyte; the solid electrolyte is disposed on a surface of the positive and/or negative electrode film layer and includes a polymer matrix and a first additive, and the first additive is configured to form an interface film on the surface of the positive and/or negative electrode film layer, where a mass percentage of the polymer matrix relative to a total mass of the solid electrolyte is denoted as A %; and a mass percentage of the first additive relative to the total mass of the solid electrolyte is denoted as B %, and the secondary battery satisfies 0.1?B/A?19.

Abstract: The present application provides a secondary battery, a battery module, a battery pack, and an electrical device. The secondary battery includes a positive electrode plate, a negative electrode plate comprising a negative electrode active material; and an electrolytic solution including a first additive and a carbonate solvent, and the first additive including a boron-containing lithium salt and an ester additive, which are configured to form a solid electrolyte interface film on the surface of the negative electrode active material, wherein a discharge capacity of the secondary battery is denoted as B1 in Ah, a change in amount of gas production of the secondary battery is denoted as B2 in mL, a mass of the electrolytic solution is denoted as C in g, a reduction potential of the first additive relative to lithium metal is denoted as D.

Abstract: A secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The secondary battery includes a positive electrode plate, a negative electrode plate and an electrolytic solution, the negative electrode plate including a negative electrode film layer containing a negative electrode active material; and the electrolytic solution including a boron-containing lithium salt, the boron-containing lithium salt being configured to form a solid electrolyte interface film on the surface of the negative electrode active material, wherein a discharge capacity of the secondary battery is denoted as A in Ah, a mass of the electrolytic solution is denoted as B in g, a mass percentage of the boron-containing lithium salt relative to a total mass of the electrolytic solution is denoted as C %; and the secondary battery satisfies: 1?B/A?5, 5×10?6?B×C %/A?0.25.

Abstract: A secondary battery, a battery module, a battery pack, and an electrical device are described. The secondary battery includes a positive electrode plate comprising a positive electrode active material, a negative electrode plate comprising a negative electrode active material, a separator being disposed between the positive electrode plate the negative electrode plate and an electrolytic solution, comprising a first organic solvent and a film-forming additive and the film-forming additive being configured to form an interface film on the surface of the positive electrode active material and/or negative electrode active material, wherein a porosity of the separator is denoted as 8%; a mass percentage of the film-forming additive relative to a total mass of the electrolytic solution is denoted as b %; and a viscosity of the electrolytic solution at 25° C. is denoted as c in mPa·s, and the secondary battery satisfies: 4? (b*?)/c?240.