# US 11,897,310 B2 · Vehicle thermal management system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,897,310 B2 - Document ID: US11897310B2 - Status: Granted - Kind: B2 - Application number: 17/691,787 - Filed: 2022-03-10 - Published: 2022-10-06 - Granted: 2024-02-13 - Earliest claimed: 2021-04-02 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Takayuki Shimauchi - Web page: https://patentgrep.com/patent/US11897310B2 ## CPC - B60H 1/004: {for vehicles having a combustion engine and electric drive means, e.g. hybrid electric vehicles} - B60H 1/00428: {electric} - B60H 1/2221: {arrangements of electric heaters for heating an intermediate liquid (B60H1/034 takes precedence)} - B60L 1/00: Supplying electric power to auxiliary equipment of vehicles (circuit arrangements for charging batteries H02J7/00) - B60L 7/10: Dynamic electric regenerative braking (B60L7/22 takes precedence) - B60L 53/22: Constructional details or arrangements of charging converters specially adapted for charging electric vehicles - H01M 10/625: Vehicles - H01M 10/63: Control systems (charging or discharging in response to temperature H01M10/44 {, H01M10/443}; measurement of temperature H01M10/48 {, H01M10/486}) - H01M 10/663: the system being an air-conditioner or an engine - B60H 1/00278: {for the battery} - B60H 1/00764: {the input being a vehicle driving condition, e.g. speed (B60H1/00828, B60H1/00864 take precedence)} - B60H 2001/00307: {Component temperature regulation using a liquid flow} - B60L 58/20: having different nominal voltages - B60L 2210/10: DC to DC converters - B60L 2220/42: with use of more than one motor - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES - 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 ## Abstract A control device supplies regenerative electric power to increase an output of a low-voltage air conditioner when the regenerative electric power is surplus with respect to electric power that is able to be charged to a main battery as compared with a case where the regenerative electric power is not surplus with respect to the electric power that is able to be charged to the main battery. Therefore, it is possible to reduce an output (work load and electric power per unit time) of a high-voltage air conditioner required to maintain comfort of an occupant in a vehicle cabin. Therefore, it is possible to improve electric power consumption rate while maintaining comfort of the occupant in the vehicle cabin. ## Claims ### Claim 1 A vehicle thermal management system comprising: a high-voltage air conditioner to which electric power is supplied from a main battery; a low-voltage air conditioner to which electric power is supplied from an auxiliary battery of which an output voltage is lower than an output voltage of the main battery; and a control device that includes a travel control electronic control unit and an air conditioner electronic control unit that are connected to each other such that the travel control electronic control unit and the air conditioner electronic control unit are able to communicate with each other, and supplies regenerative electric power to increase an output of the low-voltage air conditioner when the regenerative electric power is surplus with respect to electric power that is able to be charged to the main battery as compared with a case where the regenerative electric power is not surplus with respect to the electric power that is able to be charged to the main battery. ### Claim 2 (depends on 1) The vehicle thermal management system according to claim 1, wherein the control device changes an output of the high-voltage air conditioner according to the output of the low-voltage air conditioner. ### Claim 3 (depends on 2) The vehicle thermal management system according to claim 2, wherein the control device reduces the output of the high-voltage air conditioner when the output of the low-voltage air conditioner is increased as compared with a case where the output of the low-voltage air conditioner is not increased. ### Claim 4 (depends on 1) The vehicle thermal management system according to claim 1, wherein: the main battery is able to exchange electric power with a motor generator; a direct-current direct-current converter that lowers a voltage in an electric power path is provided between the auxiliary battery and the electric power path provided between the main battery and the motor generator; and the control device increases the output of the low-voltage air conditioner by increasing a voltage of the direct-current direct-current converter and increasing a voltage of the auxiliary battery when the regenerative electric power is surplus as compared with a case where the regenerative electric power is not surplus with respect to the electric power that is able to be charged to the main battery.