# US 10,118,500 B2 · Battery capacity estimation based on open-loop and closed-loop models > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,118,500 B2 - Document ID: US10118500B2 - Status: Granted - Kind: B2 - Application number: 15/064,639 - Filed: 2016-03-09 - Published: 2017-09-14 - Granted: 2018-11-06 - Earliest claimed: 2016-03-09 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Tae-Kyung Lee - Web page: https://patentgrep.com/patent/US10118500B2 ## CPC - B60L 58/12: responding to state of charge [SoC] - H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00) - H02J 7/50: acting upon multiple batteries simultaneously or sequentially - H02J 7/60: including safety or protection arrangements - H02J 7/82: Control of state of charge [SOC] - B60L 2240/547: Voltage - B60L 2260/52: drive range estimation, e.g. of estimation of available travel distance - 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 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02E 60/10: Energy storage using batteries - 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 - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A vehicle power system may include a controller programmed to output an electric only range indicator based on a change in capacity of a traction battery derived from open-loop and closed-loop estimates of change in state of charge of the traction battery. The change in capacity may be proportional to a ratio of the open-loop estimate to the closed-loop estimate. The closed-loop estimate may contain information indicative of the change in capacity. The open-loop estimate may contain information indicative of an initial capacity of the traction battery. ## Claims ### Claim 1 A vehicle power system comprising: a controller programmed to output an electric only range indicator based on a change in maximum capacity of a traction battery derived from open-loop and closed-loop estimates of change in state of charge of the traction battery, and operate the traction battery according to maximum charge and discharge current limits of the traction battery. ### Claim 2 (depends on 1) The system of claim 1, wherein the change in capacity is proportional to a ratio of the open-loop estimate to the closed-loop estimate. ### Claim 3 (depends on 1) The system of claim 1, wherein the closed-loop estimate contains information indicative of the change in capacity. ### Claim 4 (depends on 1) The system of claim 1, wherein the open-loop estimate contains information indicative of an initial capacity of the traction battery. ### Claim 5 (depends on 1) The system of claim 1, wherein the change in capacity is an average of a plurality of changes in capacity each associated with a change in state of charge event. ### Claim 6 A vehicle comprising: a traction battery; and a controller programmed to alter maximum charge and discharge current limits of the traction battery based on a change in maximum capacity of the traction battery derived from open-loop and closed-loop estimates of change in state of charge of the traction battery, and operate the traction battery according to the limits. ### Claim 7 (depends on 6) The vehicle of claim 6, wherein the change in capacity is proportional to a ratio of the open-loop estimate to the closed-loop estimate. ### Claim 8 (depends on 6) The vehicle of claim 6, wherein the closed-loop estimate contains information indicative of the change in capacity. ### Claim 9 (depends on 6) The vehicle of claim 6, wherein the open-loop estimate contains information indicative of an initial capacity of the traction battery. ### Claim 10 (depends on 6) The vehicle of claim 6, wherein the change in capacity is an average of a plurality of changes in capacity each associated with a change in state of charge event. ### Claim 11 A traction battery management method comprising: altering by a controller maximum charge and discharge power limits of a traction battery based on a change in maximum capacity of the traction battery derived from open-loop and closed-loop estimates of change in state of charge of the traction battery, and operate the traction battery according to the limits. ### Claim 12 (depends on 11) The method of claim 11, wherein the change in capacity is proportional to a ratio of the open-loop estimate to the closed-loop estimate. ### Claim 13 (depends on 11) The method of claim 11, wherein the closed-loop estimate contains information indicative of the change in capacity. ### Claim 14 (depends on 11) The method of claim 11, wherein the open-loop estimate contains information indicative of an initial capacity of the traction battery. ### Claim 15 (depends on 11) The method of claim 11, wherein the change in capacity is an average of a plurality of changes in capacity each associated with a change in state of charge event.