# US 2021/0331602 A1 · Apparatus and method for controlling battery of vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0331602 A1 - Document ID: US20210331602A1 - Status: Published application - Kind: A1 - Application number: 17/034,996 - Filed: 2020-09-28 - Published: 2021-10-28 - Earliest claimed: 2020-04-27 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Dae Kwang Kim; Young Ho Jung; Sang Jae Han; Sung Tae Kim - Web page: https://patentgrep.com/patent/US20210331602A1 ## CPC - B60L 58/12: responding to state of charge [SoC] - B60L 58/13: Maintaining the SoC within a determined range - B60L 50/62: charged by low-power generators primarily intended to support the batteries, e.g. range extenders - B60L 58/21: having the same nominal voltage - B60L 58/22: Balancing the charge of battery modules - B60L 2250/16: by display - Y02T 10/62: Hybrid vehicles - 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 A vehicle battery controlling apparatus is provided and includes a sensor that senses a SOC of a battery connected to a switch among a plurality of batteries and a controller that controls the on/off of the switch based on a first result of determining whether a vehicle enters a fuel-cut section and a second result of comparing the SOC of the battery with at least one or more predetermined reference values. The apparatus improves fuel efficiency by increasing energy regeneration, and improves battery durability by minimizing battery SOC in a non-regeneration section. ## Claims ### Claim 1 A vehicle battery controlling apparatus, comprising: a sensor configured to sense a state of charge (SOC) of a battery connected to a switch among a plurality of batteries; and a controller configured to control on/off of the switch based on a first result of determining whether a vehicle enters a fuel-cut section and a second result of comparing the SOC of the battery with at least one or more predetermined reference values. ### Claim 2 (depends on 1) The vehicle battery controlling apparatus of claim 1, wherein the switch is disposed between an alternator configured to adjust a voltage supplied to the battery and one battery of the plurality of batteries. ### Claim 3 (depends on 1) The vehicle battery controlling apparatus of claim 1, wherein the controller is configured to turn off the switch to disconnect the battery in response to determining that the vehicle enters the fuel-cut section, based on the first result and in response to determining that the SOC of the battery exceeds a first reference value, based on the second result. ### Claim 4 (depends on 1) The vehicle battery controlling apparatus of claim 1, wherein the controller is configured to turn on the switch and connect the battery to charge the battery in response to determining that the vehicle enters the fuel-cut section, based on the first result and in response to determining that the SOC of the battery does not exceed a first reference value, based on the second result. ### Claim 5 (depends on 1) The vehicle battery controlling apparatus of claim 1, wherein the controller is configured to turn on the switch and connect the battery to discharge the battery in response to determining that the vehicle does not enter the fuel-cut section, based on the first result and in response to determining that the SOC of the battery exceeds a second reference value, based on the second result. ### Claim 6 (depends on 1) The vehicle battery controlling apparatus of claim 1, wherein the controller is configured to compare the SOC of the battery with a third reference value in response to determining that the vehicle does not enter the fuel-cut section, based on the first result and in response to determining that the SOC of the battery does not exceed a second reference value, based on the second result. ### Claim 7 (depends on 6) The vehicle battery controlling apparatus of claim 6, wherein the controller is configured to turn off the switch to disconnect the battery in response to determining that the SOC of the battery exceeds the third reference value. ### Claim 8 (depends on 6) The vehicle battery controlling apparatus of claim 6, wherein the controller is configured to turn on the switch to charge the battery in response to determining that the SOC of the battery is less than the third reference value. ### Claim 9 (depends on 1) The vehicle battery controlling apparatus of claim 1, wherein the controller is configured to turn on the switch to discharge the battery in response to determining that the vehicle is stopped during an Idle Stop and Go (ISG) operation, based on a third result of determining whether the vehicle is stopped during the ISG operation, and in response to determining that the SOC of the battery exceeds a fourth reference value, based on the second result. ### Claim 10 (depends on 9) The vehicle battery controlling apparatus of claim 9, wherein the controller is configured to turn off the switch to disconnect the battery in response to determining that the vehicle is stopped during the ISG operation, based on the third result and in response to determining that the SOC of the battery is less than the fourth reference value, based on the second result. ### Claim 11 A method for controlling a vehicle battery, comprising: sensing, by a sensor, a state of charge (SOC) of a battery connected to a switch among a plurality of batteries; and executing, by a controller, on/off of the switch based on a first result of determining whether a vehicle enters a fuel-cut section and a second result of comparing the SOC of the battery with at least one or more predetermined reference values. ### Claim 12 (depends on 11) The method of claim 11, wherein the switch is disposed between an alternator configured to adjust a voltage supplied to the battery and one battery of the plurality of batteries. ### Claim 13 (depends on 11) The method of claim 11, further comprising: turning off the switch to disconnect the battery in response to determining that the vehicle enters the fuel-cut section, based on the first result and in response to determining that the SOC of the battery exceeds a first reference value, based on the second result. ### Claim 14 (depends on 11) The method of claim 11, further comprising: turning on the switch and connecting the battery to charge the battery in response to determining that the vehicle enters the fuel-cut section, based on the first result and in response to determining that the SOC of the battery is less than a first reference value, based on the second result. ### Claim 15 (depends on 11) The method of claim 11, further comprising: turning on the switch and connecting the battery to discharge the battery in response to determining that the vehicle does not enter the fuel-cut section, based on the first result and in response to determining that the SOC of the battery exceeds a second reference value, based on the second result. ### Claim 16 (depends on 11) The method of claim 11, further comprising: comparing the SOC of the battery with a third reference value in response to determining that the vehicle does not enter the fuel-cut section, based on the first result and in response to determining that the SOC of the battery is less than a second reference value, based on the second result. ### Claim 17 (depends on 16) The method of claim 16, further comprising: turning off the switch to disconnect the battery in response to determining that the SOC of the battery exceeds the third reference value. ### Claim 18 (depends on 16) The method of claim 16, further comprising: turning on the switch to charge the battery in response to determining that the SOC of the battery is less than the third reference value. ### Claim 19 (depends on 11) The method of claim 11, further comprising: turning on the switch to discharge the battery in response to determining that the vehicle is stopped during an Idle Stop and Go (ISG) operation, based on a third result of determining whether the vehicle is stopped during the ISG operation, and in response to determining that the SOC of the battery exceeds a fourth reference value, based on the second result. ### Claim 20 (depends on 19) The method of claim 19, further comprising: turning off the switch to disconnect the battery in response to determining that the vehicle is stopped during the ISG operation, based on the third result and in response to determining that the SOC of the battery is less than the fourth reference value, based on the second result.