# US 11,906,492 B2 · Apparatus for quantitatively analyzing oxygen generated in battery material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,492 B2 - Document ID: US11906492B2 - Status: Granted - Kind: B2 - Application number: 16/479,049 - Filed: 2018-01-24 - Published: 2019-12-05 - Granted: 2024-02-20 - Earliest claimed: 2017-07-31 - Assignees: LG Energy Solution, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Sungwon Hong; Kyungmee Lee; Nak Hee Choi; Jeong Ae Ahn; Jin Il Kim - Web page: https://patentgrep.com/patent/US11906492B2 ## CPC - G01N 31/12: using combustion (G01N25/20 takes precedence) - G01N 1/22: in the gaseous state {(specially adapted for biological material G01N33/497; measuring breath flow A61B5/087)} - G01N 33/0013: {by a chemical reaction (a chemical reaction taking place or a gas being eliminated in one or more analysing channels G01N33/0024)} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/42: Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells (H01M10/60 takes precedence) - H01M 10/4285: {Testing apparatus} - H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) - Y02E 60/10: Energy storage using batteries - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract An apparatus for quantitatively analyzing gas, particularly oxygen, generated in a battery material, particularly a cathode material is provided. The apparatus contains a switching valve and a sampling loop in a pyrolyzer, thereby allowing an EGA method, which was used only for the qualitative analysis of gas generated from a solid sample, to be used for the quantitative analysis of gas generated at a specific temperature when heat is applied by the pyrolyzer in a battery material. ## Claims ### Claim 1 An apparatus for quantitative analysis of a gas sample, comprising: a pyrolyzer; a line for supplying a carrier gas into the pyrolyzer; a sampling loop for collecting a standard gas; a switching valve for injecting the standard gas collected in the sampling loop together with the carrier gas into the pyrolyzer; and a vacuum pump configured to vacuum depressurize the sampling loop, wherein the sampling loop is directly coupled to the switching valve, and the switching valve is directly coupled to the pyrolyzer through the line for supplying the carrier gas, and wherein the sampling loop and the switching valve are configured to inject the standard gas into the pyrolyzer at a constant amount. ### Claim 2 (depends on 1) The apparatus for quantitative analysis of a gas sample according to claim 1, wherein the standard gas is collected in the sampling loop that is vacuum depressurized and the carrier gas flows through the sampling loop as the switching valve is operated and the carrier gas and the standard gas are injected into the pyrolyzer. ### Claim 3 (depends on 1) The apparatus for quantitative analysis of a gas sample according to claim 1, wherein the switching valve is operated after the sampling loop is subject to vacuum-depressurizing by the vacuum pump, thereby injecting the carrier gas through the sampling loop that is a vacuum-depressurized and into the pyrolyzer wherein the pyrolyzer is configured to detect an amount of gases generated from a cell material inside the pyrolyzer. ### Claim 4 (depends on 1) The apparatus for quantitative analysis of a gas sample according to claim 1, wherein the pyrolyzer is an evolved gas analyzer (EGA). ### Claim 5 (depends on 1) The apparatus for quantitative analysis of a gas sample according to claim 1, wherein the gas sample comprises a gas generated when heat is applied to a cell material by the pyrolyzer. ### Claim 6 (depends on 5) The apparatus for quantitative analysis of a gas sample according to claim 5, wherein the cell material is a cathode material comprising Li-metal oxide compounds (LiMeO2). ### Claim 7 (depends on 5) The apparatus for quantitative analysis of a gas sample according to claim 5, wherein the gases generated from the cell material applied with heat of the pyrolyzer is at least one selected from oxygen, carbon dioxide, carbon monoxide and water vapor. ### Claim 8 (depends on 1) The apparatus for quantitative analysis of a gas sample according to claim 1, wherein the carrier gas is He, N2 or Ar. ### Claim 9 (depends on 1) A method for quantitative analysis of a gas sample by using the apparatus for quantitative analysis of a gas sample according to claim 1, comprising: collecting the standard gas in the sampling loop that is vacuum depressurized; operating the switching valve for flowing carrier gas through the sampling loop; and injecting the carrier gas and the standard gas into the pyrolyzer. ### Claim 10 (depends on 1) A method for quantitative analysis of a gas sample by using the apparatus for quantitative analysis of a gas sample according to claim 1, comprising: operating the switching valve after the sampling loop is subject to vacuum-depressurizing by the vacuum pump; injecting the carrier gas through the sampling loop that is vacuum-depressurized and into the pyrolyzer; and detecting an amount of gases generated from a cell material inside the pyrolyzer.