# US 11,440,433 B2 · Method for determining a state-of-charge operating window of a battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,440,433 B2 - Document ID: US11440433B2 - Status: Granted - Kind: B2 - Application number: 16/954,244 - Filed: 2018-12-20 - Published: 2020-12-31 - Granted: 2022-09-13 - Earliest claimed: 2017-12-22 - Assignees: Volvo Truck Corporation - Applicants: Volvo Truck Corporation - Inventors: Simon Brunet; Tobias Smidebrant - Web page: https://patentgrep.com/patent/US11440433B2 ## CPC - B60L 58/13: Maintaining the SoC within a determined range - B60L 58/12: responding to state of charge [SoC] - B60L 58/18: of two or more battery modules - B60L 2200/18: Buses - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The invention relates to a method (100) for determining an adjusted state-of-charge (SOC) operating window of a battery pack assembly in a vehicle. The method comprises the steps of determining (120) an energy throughput or an electrical current through put of the battery pack assembly; determining (130) a SOC operating window margin based on said determined energy throughput or electrical current through put of the battery pack assembly;adjusting (140) the SOC operating window in response to the determined SOC operating window margin. ## Claims ### Claim 1 A method for determining an adjusted state-of-charge (SOC) operating window of a battery pack assembly in a vehicle, the method comprising the steps of: measuring electrical current inflow and outflow of the battery pack assembly with a sensor unit; determining an energy throughput or an electrical current throughput of the battery pack assembly using the electrical current inflow and outflow of the battery pack assembly measured by the sensor unit; determining a SOC operating window margin with a control unit, based on said determined energy throughput or electrical current throughput of the battery pack assembly, wherein a magnitude of the SOC operating window margin is a function of the determined energy throughput or electrical current throughput of the battery pack assembly; and adjusting the SOC operating window in response to the determined SOC operating window margin. ### Claim 2 (depends on 1) The method according to claim 1, wherein the step of adjusting the SOC operating window in response to the determined SOC operating window margin is performed by increasing a lower end limit of the SOC operating window by said determined SOC operating window margin and/or decreasing an upper end limit of the SOC operating window by said determined SOC operating window margin. ### Claim 3 (depends on 2) The method according to claim 2, wherein the step of adjusting the SOC operating window in response to the determined SOC operating window margin is performed to form an asymmetrical adjusted SOC operating window or a symmetrical adjusted SOC operating window. ### Claim 4 (depends on 1) The method according to claim 1, further comprising the step of controlling the vehicle electrical system so that the SOC of the battery pack assembly remains within the adjusted SOC operating window. ### Claim 5 (depends on 4) The method according to claim 4, further comprising the step of receiving a signal from a battery management unit comprising data indicative of the SOC of the battery pack assembly. ### Claim 6 (depends on 1) The method according to claim 1, further comprising the step of resetting the determined energy throughput or electrical current throughput of the battery pack assembly and resetting the determined SOC operating window margin to a default SOC operating window margin. ### Claim 7 (depends on 6) The method according to claim 6, wherein the step is performed subsequently to a SOC re-calibration operation. ### Claim 8 (depends on 1) The method according to claim 1, wherein the step of determining the energy throughput or electrical current throughput of the battery is initiated by receiving, at the control unit, an indication from the battery pack assembly to monitor inflow of energy or electrical current of the battery pack assembly and outflow of energy or electrical current of the battery pack assembly. ### Claim 9 (depends on 1) The method according to claim 1, wherein the step of determining the energy throughput or electrical current throughput of the battery is performed by measuring the inflow of energy or electrical current at an electrical current inflow of the battery pack assembly and an outflow of energy or electrical current at an electrical current outflow of the battery pack assembly. ### Claim 10 (depends on 9) The method according to claim 9, wherein the step is performed by arranging a measuring sensor configured to measure the inflow of energy or electrical current at the electrical current inflow of the battery pack and the outflow of energy or electrical current at the electrical current outflow of the battery pack. ### Claim 11 (depends on 1) The method according to claim 1, in which the battery pack assembly comprises any one of a lithium-ion battery or sodium-ion battery. ### Claim 12 (depends on 1) The method according to claim 1, in which the steps of the method is performed by a control unit. ### Claim 13 An apparatus for determining an adjusted state-of-charge (SOC) operating window of a battery pack assembly in a vehicle, comprising: a memory operable to store computer-readable instructions; and a processor operable to read the computer-readable instructions, the processor when executing the computer-readable instructions is configured to: measure electrical current inflow and outflow of the battery pack assembly with a sensor unit determine an energy throughput or an electrical current throughput of the battery pack assembly using the electrical current inflow and outflow of the battery pack assembly measured by the sensor unit; determine a SOC operating window margin with a control unit, based on said determined energy throughput or electrical current throughput of the battery pack assembly, wherein a magnitude of the SOC operating window margin is a function of the determined energy throughput or electrical current throughput of the battery pack assembly; and adjust the SOC operating window in response to the determined SOC operating window margin. ### Claim 14 (depends on 1) A non-transitory computer readable medium carrying a computer program comprising program means for performing the steps of claim 1 when said program means is run on a computer. ### Claim 15 A control unit for determine an adjusted state-of-charge (SOC) operating window of a battery pack assembly in a vehicle, the control unit being configured to: measure electrical current inflow and outflow of the battery pack assembly with a sensor unit: determine an energy throughput or an electrical current throughput of the battery pack assembly using the electrical current inflow and outflow of the battery pack assembly measured by the sensor unit determine a SOC operating window margin with a control unit, based on said determined energy throughput or electrical current throughput of the battery pack assembly, wherein a magnitude of the SOC operating window margin is a function of the determined energy throughput or electrical current throughput of the battery pack assembly; and adjust the SOC operating window in response to the determined SOC operating window margin. ### Claim 16 (depends on 15) A vehicle, comprising a battery pack assembly and a control unit according to claim 15.