# US 12,007,232 B2 · Methods to continuously monitor battery cell physical health and swell > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,007,232 B2 - Document ID: US12007232B2 - Status: Granted - Kind: B2 - Application number: 17/435,930 - Filed: 2019-05-30 - Published: 2022-05-12 - Granted: 2024-06-11 - Earliest claimed: 2019-05-30 - Assignees: Google Inc. - Applicants: Google LLC - Inventors: Jonathan D. Hurwitz - Web page: https://patentgrep.com/patent/US12007232B2 ## CPC - G01B 7/28: for measuring contours or curvatures - G01L 1/142: {using capacitors} - G01L 1/20: by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids (of piezo-resistive materials G01L1/18); by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress - G01L 5/10: using electrical means - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - H01M 10/445: {in response to gas pressure} - 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) - H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - Y02E 60/10: Energy storage using batteries - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) - 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 The present disclosure relates to methods for monitoring the health of a battery cell. Specifically, the method includes receiving, by a controller communicatively coupled a pressure sensor positioned proximate to a battery housing having an initial volume and an initial shape and containing a battery cell, a pressure value indicative of a current volume or a current shape of the battery' housing. The pressure sensor is configured to measure the pressure value indicative of the current volume or the current shape of the battery' housing. The method also involves comparing, by the controller, the pressure value to a predetermined threshold pressure value. The method further involves adjusting, by the controller and based on the comparison, at least one parameter associated with operations of the battery cell. ## Claims ### Claim 1 A system comprising: a battery cell, wherein the battery cell comprises a battery housing having an initial volume and an initial shape; a pressure sensor, wherein the pressure sensor is positioned proximate to the battery housing, wherein the pressure sensor is configured to measure a pressure value indicative of a current volume or a current shape of the battery housing; a primary band coupled around a perimeter of the battery housing and having a first orientation, wherein the primary band includes a sensor housing that contains the pressure sensor, wherein the primary band is capable of expanding and increasing tension in proportion to expansions of the battery housing beyond the initial volume or the initial shape, and wherein the pressure value indicative of the current volume or the current shape of the battery housing is based on a current tension of the primary band with respect to the battery housing; an auxiliary band coupled around the perimeter of the battery housing and having a second orientation that is substantially perpendicular to the first orientation, wherein the auxiliary band intersects the primary band; and a controller operable to perform operations, the operations comprising: receiving, from the pressure sensor, the pressure value indicative of the current volume or the current shape of the battery housing; comparing the pressure value indicative of a current volume or a current shape of the battery housing to a predetermined threshold pressure value; and based on the comparison, adjusting at least one operating parameter of the system. ### Claim 2 (depends on 1) The system of claim 1, wherein the auxiliary band is capable of expanding and increasing tension in proportion to expansions of the battery housing beyond the initial volume or the initial shape, and wherein the pressure value indicative of the current volume or the current shape of the battery housing is based on the current tension of the primary band with respect to the battery housing and a current tension of the auxiliary band with respect to the battery housing. ### Claim 3 (depends on 1) The system of claim 1, wherein the primary band and the auxiliary band comprise a thermally conductive material. ### Claim 4 (depends on 1) The system of claim 1, wherein the primary band and the auxiliary band comprise a material more rigid than the battery housing. ### Claim 5 (depends on 1) The system of claim 1, wherein the pressure sensor comprises a capacitive pressure sensor or a resistive pressure sensor. ### Claim 6 (depends on 1) The system of claim 1, wherein adjusting the at least one operating parameter of the system comprises adjusting a charging rate of the battery cell, adjusting a maximum charge capacity of the battery cell, or adjusting a maximum cell voltage of the battery cell. ### Claim 7 A device comprising: a pressure sensor, wherein the pressure sensor is positioned proximate to a battery housing having an initial volume and an initial shape and containing a battery cell, and wherein the pressure sensor is configured to measure a pressure value indicative of a current volume or a current shape of the battery housing; a primary band coupled around a perimeter of the battery housing and having a first orientation, wherein the primary band includes a sensor housing that contains the pressure sensor, wherein the primary band is capable of expanding and increasing tension in proportion to expansions of the battery housing beyond the initial volume or the initial shape, and wherein the pressure value indicative of the current volume or the current shape of the battery housing is based on a current tension of the primary band with respect to the battery housing; an auxiliary band coupled around the perimeter of the battery housing and having a second orientation that is substantially perpendicular to the first orientation, wherein the auxiliary band intersects the primary band; and a controller operable to perform operations, the operations comprising: receiving, from the pressure sensor, the pressure value indicative of the current volume or the current shape of the battery housing; comparing the pressure value indicative of the current volume or the current shape of the battery housing to a predetermined threshold pressure value; and based on the comparison, adjusting at least one operating parameter of the device. ### Claim 8 (depends on 7) The device of claim 7, wherein the auxiliary band is capable of expanding and increasing tension in proportion to expansions of the battery housing beyond the initial volume or the initial shape, and wherein the pressure value indicative of the current volume or the current shape of the battery housing is based on the current tension of the primary band with respect to the battery housing and a current tension of the auxiliary band with respect to the battery housing. ### Claim 9 (depends on 7) The device of claim 7, wherein the primary band and the auxiliary band comprise a thermally conductive material. ### Claim 10 (depends on 7) The device of claim 7, wherein the primary band and the auxiliary band comprise a material more rigid than the battery housing. ### Claim 11 (depends on 7) The device of claim 7, wherein the pressure sensor comprises a capacitive pressure sensor or a resistive pressure sensor. ### Claim 12 (depends on 7) The device of claim 7, wherein adjusting the at least one operating parameter of the device comprises adjusting a charging rate of the battery cell, adjusting a maximum charge capacity of the battery cell, or adjusting a maximum cell voltage of the battery cell. ### Claim 13 A method comprising: receiving, by a controller communicatively coupled to a pressure sensor positioned proximate to a battery housing having an initial volume and an initial shape and containing a battery cell, a pressure value indicative of a current volume or a current shape of the battery housing, wherein the pressure sensor is configured to measure the pressure value indicative of the current volume or the current shape of the battery housing, wherein a primary band coupled around a perimeter of the battery housing and having a first orientation, wherein the primary band includes a sensor housing that contains the pressure sensor, wherein the primary band is capable of expanding and increasing tension in proportion to expansions of the battery housing beyond the initial volume or the initial shape, and wherein the pressure value indicative of the current volume or the current shape of the battery housing is based on a current tension of the primary band with respect to the battery housing, further comprising an auxiliary band coupled around the perimeter of the battery housing and having a second orientation that is substantially perpendicular to the first orientation, wherein the auxiliary band intersects the primary band; comparing, by the controller, the pressure value indicative of the current volume or the current shape of the battery housing to a predetermined threshold pressure value; and adjusting, by the controller and based on the comparison, at least one parameter associated with operations of the battery cell. ### Claim 14 (depends on 13) The method of claim 13, wherein adjusting the at least one parameter associated with operations of the battery cell comprises adjusting a charging rate of the battery cell, adjusting a maximum charge capacity of the battery cell, or adjusting a maximum cell voltage of the battery cell.