# US 10,118,501 B2 · Control method and system for charging high voltage 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 10,118,501 B2 - Document ID: US10118501B2 - Status: Granted - Kind: B2 - Application number: 15/086,880 - Filed: 2016-03-31 - Published: 2017-06-01 - Granted: 2018-11-06 - Earliest claimed: 2015-11-30 - Assignees: Hyundai Motor Company - Applicants: Hyundai Motor Company - Inventors: Jee Heon Kim; Ho Joong Lee; Won Kyoung Choi; Jun Yeon Park - Web page: https://patentgrep.com/patent/US10118501B2 ## CPC - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - B60L 58/12: responding to state of charge [SoC] - B60L 58/20: having different nominal voltages - B60L 58/21: having the same nominal voltage - H02J 7/342: {The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging (with circuits for polarity protection H02J7/68)} - H02J 7/953: {in response to charge current gradient} - H02J 7/963: {in response to battery voltage gradient} - B60L 2210/12: Buck converters - H02J 2105/37: exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/72: Electric energy management in electromobility - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - 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 - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract a control method for charging a high voltage battery of a vehicle includes charging, by a vehicle controller, the high voltage battery using a low voltage DC-DC converter The state information. of the low voltage DC-DC converter, which includes the current and the temperature of the low voltage DC-DC converter, is sensed by the vehicle controller while charging the high voltage battery. The charging current of the high voltage battery is derated by the vehicle controller when the sensed state information of the low voltage DC-DC converter satisfies a converter derating condition. ## Claims ### Claim 1 A control method for charging a high voltage battery, the method comprising: charging, by a vehicle controller, the high voltage battery using a low voltage DC-DC converter; sensing, by the vehicle controller, state information of the low voltage DC-DC converter, which includes a current and a temperature of the low voltage DC-DC converter, while charging the high voltage battery; and derating, by the vehicle controller, a charging current of the high voltage battery when the sensed state information of the low voltage DC-DC converter satisfies a converter derating condition. ### Claim 2 (depends on 1) The control method of claim 1, further comprising, before the step of charging the high voltage battery: sensing, by the vehicle controller, a state of charge (SOC) of the high voltage battery; comparing, by the vehicle controller, the sensed. SOC of the high. voltage battery with a minimum reference SOC; and setting, by the vehicle controller, a condition for the low voltage DC-DC converter to charge the high voltage battery using an auxiliary battery when the sensed SOC of the high voltage battery is less than the minimum reference SOC. ### Claim 3 (depends on 2) The control method of claim 2, wherein when the sensed SOC of the high voltage battery is equal to or greater than the minimum reference SOC, the control method ends. ### Claim 4 (depends on 2) The control method of claim 2, wherein the step of setting the condition for the low voltage DC-DC converter comprises: setting, by the vehicle controller, an output voltage command to be lower than a voltage of the auxiliary battery; and changing, by the vehicle controller, a duty ratio of an auxiliary switch of the low voltage DC-DC converter. ### Claim 5 (depends on 4) The control method of claim 4, wherein the step of changing the duty ratio comprises: changing, by the vehicle controller, the duty ratio of the auxiliary switch using a difference between the output voltage command and the voltage of the auxiliary battery. ### Claim 6 (depends on 1) The control method of claim 1, further comprising, after charging the high voltage battery: sensing, by the vehicle controller, state information of an auxiliary battery while charging the high voltage battery. ### Claim 7 (depends on 6) The control method of claim 6, wherein the state information of the auxiliary battery includes a discharge current of the auxiliary battery, a temperature of the auxiliary battery, and an SOC of the auxiliary battery. ### Claim 8 (depends on 6) The control method of claim 6, further comprising, after the step of sensing the state information of the auxiliary battery: derating, by the vehicle controller, the charging current of the high voltage battery when the sensed state information of the auxiliary battery satisfies an auxiliary battery derating condition. ### Claim 9 (depends on 8) The control method of claim 8, wherein the auxiliary battery derating condition is determined by the following equation: Ia