# US 2017/0256784 A1 · Battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0256784 A1 - Document ID: US20170256784A1 - Status: Published application - Kind: A1 - Application number: 15/602,614 - Filed: 2017-05-23 - Published: 2017-09-07 - Earliest claimed: 2013-05-31 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Tomohiro ABE; Motomi SUZUKI - Web page: https://patentgrep.com/patent/US20170256784A1 ## CPC - H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - B60L 53/00: Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles - B60L 53/51: Photovoltaic means - B60L 53/52: Wind-driven generators - B60L 58/10: for monitoring or controlling batteries - H01M 4/136: Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy - H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy - H01M 50/449: having a layered structure - H01M 50/451: comprising layers of only organic material and layers containing inorganic material - H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes - H01M 50/491: Porosity - H01M 10/052: Li-accumulators - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - H01M 10/486: {for measuring temperature} - H01M 50/406: Moulding; Embossing; Cutting - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - H01M 2004/028: {Positive electrodes} - H01M 2200/106: PTC - H01M 2200/20: Pressure-sensitive devices - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y02T 90/12: Electric charging stations - Y02T 90/14: Plug-in electric vehicles - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A battery is provided. The battery includes a positive electrode including a positive electrode active material layer provided on a positive electrode current collector; a negative electrode; and a separator at least including a porous film, wherein the porous film has a porosity ε[%] and an air permeability t[sec/100 cc] which satisfy formulae of: t=a×Ln(ε)−4.02a+100 and −1.87×1010×S−4.96≦a≦−40 wherein S is the area density of the positive electrode active material layer [mg/cm2] and Ln is natural logarithm. ## Claims ### Claim 1 A battery, comprising: a positive electrode including a positive electrode current collector and a positive electrode active material layer provided on the positive electrode current collector, the positive electrode active material layer including a lithium nickel composite oxide and a lithium manganese composite oxide; wherein a mass ratio of (a mass of the lithium nickel composite oxide):(a mass of the lithium manganese composite oxide) in the positive electrode active material layer is in a range of from 5:5 to 10:0, a negative electrode; and a separator at least including a porous film, the porous film having a porosity ε[%] and an air permeability t[sec/100 cc] which satisfy formula of: t=a×Ln(ε)−4.02a+100 and −1.87×1010×S4.96≦a≦−40 where S is an area density of the positive electrode active material layer [mg/cm2] and Ln is natural logarithm. ### Claim 2 (depends on 1) The battery according to claim 1, wherein the positive electrode active material layer has an area density less than or equal to 50 mg/cm2. ### Claim 3 (depends on 1) The battery according to claim 1, wherein the lithium nickel composite oxide includes: LixNi0.80Co0.15Al0.05O2 where x is within a range of 0.8