# US 11,897,363 B2 · Vehicle driving system and vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,897,363 B2 - Document ID: US11897363B2 - Status: Granted - Kind: B2 - Application number: 17/542,606 - Filed: 2021-12-06 - Published: 2022-06-09 - Granted: 2024-02-13 - Earliest claimed: 2020-12-08 - Assignees: Prime Planet Energy & Solutions, Inc. - Applicants: Prime Planet Energy & Solutions, Inc. - Inventors: Atsushi Sugihara; Shizuka Masuoka; Kodai Nagano - Web page: https://patentgrep.com/patent/US11897363B2 ## CPC - B60L 58/12: responding to state of charge [SoC] - B60L 50/51: characterised by AC-motors - B60L 53/22: Constructional details or arrangements of charging converters specially adapted for charging electric vehicles - B60L 58/13: Maintaining the SoC within a determined range - B60L 58/18: of two or more battery modules - B60L 58/20: having different nominal voltages - H02J 7/1423: {with multiple batteries} - 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 7/82: Control of state of charge [SOC] - B60K 6/26: characterised by the motors or the generators - 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 - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A vehicle driving system includes a drive motor-generator connected to a first battery and a second battery via respective relays, a power receiving unit connected to the first battery and the second battery via respective relays and connected to an external power supply, and a controller. The controller is configured to, when the power receiving unit is connected to the external power supply, cause the first battery to be charged if the state of charge of the first battery is lower than a predetermined SOC and cause the second battery to be charged if the state of charge of the first battery is higher than or equal to the predetermined SOC. ## Claims ### Claim 1 A vehicle driving system comprising: a first battery; a second battery; a drive motor-generator connected to the first battery and the second battery via respective relays; a power receiving unit connected to the first battery and the second battery via respective relays and also connected to an external power supply, wherein the first battery is configured to be charged and discharged at a current rate of higher than or equal to 5 C; the second battery has a higher capacity than the first battery; and a controller configured to: when the power receiving unit is connected to the external power supply, cause the first battery to be charged if the state of charge of the first battery is lower than a predetermined SOC, and cause the second battery to be charged if the state of charge of the first battery is higher than or equal to the predetermined SOC; and when regenerative power is output from the drive motor-generator, cause the regenerative power to be input to the first battery if the state of charge of the first battery is lower than a predetermined SOC, and cause the regenerative power to be input to the second battery if the state of charge of the first battery is higher than or equal to the predetermined SOC. ### Claim 2 (depends on 1) The vehicle driving system according to claim 1, wherein the controller is configured to cause a charging current value to be higher when the first battery is charged from the power receiving unit than when the second battery is charged from the power receiving unit. ### Claim 3 (depends on 1) The vehicle driving system according to claim 1, wherein: the controller is configured to: cause the drive motor-generator to be connected to the first battery when an output power value required by the drive motor-generator is higher than or equal to a predetermined output power value and the state of charge of the first battery is higher than or equal to a predetermined SOC; and cause the drive motor-generator to be connected to the second battery when the output power value required by the drive motor-generator is higher than or equal to the predetermined output power value and the state of charge of the first battery is lower than the predetermined SOC. ### Claim 4 (depends on 1) The vehicle driving system according to claim 1, wherein: the controller is configured to: cause the drive motor-generator to be connected to the second battery when an output power value required by the drive motor-generator is lower than a predetermined output power value and the state of charge of the second battery is higher than or equal to a predetermined SOC; and cause the drive motor-generator to be connected to the first battery when the output power value required by the drive motor-generator is lower than the predetermined output power value and the state of charge of the second battery is lower than the predetermined SOC. ### Claim 5 (depends on 1) The vehicle driving system according to claim 1, wherein the controller is configured to cause the first battery to be charged from the second battery when both the first battery and the second battery are disconnected from the drive motor-generator and the state of charge of the first battery is lower than a predetermined SOC. ### Claim 6 (depends on 1) The vehicle driving system according to claim 1, wherein the controller is configured to cause the second battery to be charged from the first battery when both the first battery and the second battery are disconnected from the drive motor-generator and the state of charge of the first battery is higher than a predetermined SOC. ### Claim 7 (depends on 1) The vehicle driving system according to claim 1, wherein the first battery is lighter in weight and smaller in size than the second battery. ### Claim 8 (depends on 1) A vehicle comprising the vehicle driving system according to claim 1. ### Claim 9 A vehicle driving system comprising: a first battery; a second battery; a drive motor-generator connected to the first battery and the second battery via respective relays; a power receiving unit connected to the first battery and the second battery via respective relays and also connected to an external power supply, wherein the first battery is configured to be charged and discharged at a current rate of higher than or equal to 5 C; the second battery has a higher capacity than the first battery; and a controller configured to: cause the drive motor-generator to be connected to the first battery when an output power value required by the drive motor-generator is higher than or equal to a predetermined output power value and the state of charge of the first battery is higher than or equal to a predetermined SOC; and cause the drive motor-generator to be connected to the second battery when the output power value required by the drive motor-generator is higher than or equal to the predetermined output power value and the state of charge of the first battery is lower than the predetermined SOC. ### Claim 10 (depends on 9) The vehicle driving system according to claim 9, wherein the controller is configured to cause a charging current value to be higher when the first battery is charged from the power receiving unit than when the second battery is charged from the power receiving unit. ### Claim 11 (depends on 9) The vehicle driving system according to claim 9, wherein the first battery is lighter in weight and smaller in size than the second battery. ### Claim 12 (depends on 9) The vehicle driving system according to claim 9, wherein the controller is configured to cause the first battery to be charged from the second battery when both the first battery and the second battery are disconnected from the drive motor-generator and the state of charge of the first battery is lower than a predetermined SOC. ### Claim 13 (depends on 9) The vehicle driving system according to claim 9, wherein the controller is configured to cause the second battery to be charged from the first battery when both the first battery and the second battery are disconnected from the drive motor-generator and the state of charge of the first battery is higher than a predetermined SOC. ### Claim 14 A vehicle driving system comprising: a first battery; a second battery; a drive motor-generator connected to the first battery and the second battery via respective relays; a power receiving unit connected to the first battery and the second battery via respective relays and also connected to an external power supply, wherein the first battery is configured to be charged and discharged at a current rate of higher than or equal to 5 C; the second battery has a higher capacity than the first battery; and a controller configured to: cause the drive motor-generator to be connected to the second battery when an output power value required by the drive motor-generator is lower than a predetermined output power value and the state of charge of the second battery is higher than or equal to a predetermined SOC; and cause the drive motor-generator to be connected to the first battery when the output power value required by the drive motor-generator is lower than the predetermined output power value and the state of charge of the second battery is lower than the predetermined SOC. ### Claim 15 (depends on 14) The vehicle driving system according to claim 14, wherein the controller is configured to cause a charging current value to be higher when the first battery is charged from the power receiving unit than when the second battery is charged from the power receiving unit. ### Claim 16 (depends on 14) The vehicle driving system according to claim 14, wherein the first battery is lighter in weight and smaller in size than the second battery. ### Claim 17 A vehicle driving system comprising: a first battery; a second battery; a drive motor-generator connected to the first battery and the second battery via respective relays; a power receiving unit connected to the first battery and the second battery via respective relays and also connected to an external power supply, wherein the first battery is configured to be charged and discharged at a current rate of higher than or equal to 5 C; the second battery has a higher capacity than the first battery; and a controller configured to: when the power receiving unit is connected to the external power supply, cause the first battery to be charged if the state of charge of the first battery is lower than a predetermined SOC, and cause the second battery to be charged if the state of charge of the first battery is higher than or equal to the predetermined SOC; and cause the first battery to be charged from the second battery when both the first battery and the second battery are disconnected from the drive motor-generator and the state of charge of the first battery is lower than a predetermined SOC. ### Claim 18 (depends on 17) The vehicle driving system according to claim 17, wherein the controller is configured to cause a charging current value to be higher when the first battery is charged from the power receiving unit than when the second battery is charged from the power receiving unit. ### Claim 19 (depends on 17) The vehicle driving system according to claim 17, wherein the first battery is lighter in weight and smaller in size than the second battery.