# US 12,214,695 B2 · Vehicle battery management system

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- Number: US 12,214,695 B2
- Document ID: US12214695B2
- Status: Granted
- Kind: B2
- Application number: 18/073,122
- Filed: 2022-12-01
- Published: 2023-12-21
- Granted: 2025-02-04
- Earliest claimed: 2022-06-21
- Assignees: Drivetech Co., Ltd.
- Applicants: Drivetech Co., Ltd.
- Inventors: Yun Yong Choi; Myeong Gyun Choi
- Web page: https://patentgrep.com/patent/US12214695B2

## CPC

- B60L 58/12: responding to state of charge [SoC]
- B60L 1/00: Supplying electric power to auxiliary equipment of vehicles (circuit arrangements for charging batteries H02J7/00)
- B60L 53/11: {DC charging controlled by the charging station, e.g. mode 4}
- B60L 58/13: Maintaining the SoC within a determined range
- B60L 58/18: of two or more battery modules
- B60L 58/21: having the same nominal voltage
- H02J 7/82: Control of state of charge [SOC]
- H02J 7/855: {with circuits adapted for supplying loads from the battery}
- B60L 2240/622: by satellite navigation
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 90/12: Electric charging stations
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The present disclosure provides a vehicle battery management system. In a vehicle battery management system including a battery unit configured to supply power to an electric vehicle, and a controller configured to control the battery unit, the battery unit is divided into a first battery unit and a second battery unit, the first battery unit supplies power to a motor for generating driving force of the electric vehicle, the second battery unit supplies power to an outside of the electric vehicle, the controller performs a control operation so that power supplied from the first battery unit is supplied to the outside of the electric vehicle or power supplied from the second battery unit is supplied to the motor based on an SOC of each of the first battery unit and the second battery unit and state information of the electric vehicle.

## Claims

### Claim 1

A vehicle battery management system comprising:
a battery unit configured to supply power to an electric vehicle; and
a controller configured to control the battery unit, wherein:
the battery unit is divided into a first battery unit and a second battery unit;
the first battery unit supplies power to a motor for generating driving force of the electric vehicle;
the second battery unit supplies power to an outside of the electric vehicle;
the controller performs a control operation so that power supplied from the first battery unit is supplied to the outside of the electric vehicle or power supplied from the second battery unit is supplied to the motor based on a state of charge (SOC) of each of the first battery unit and the second battery unit and state information of the electric vehicle; and
the state information of the electric vehicle includes whether the electric vehicle is being driven, whether the electric vehicle is stopped, and a distance between the electric vehicle and an electric charging station.

### Claim 2 (depends on 1)

The vehicle battery management system of claim 1, wherein the first battery unit and the second battery unit are configured as separate battery packs.

### Claim 3 (depends on 1)

The vehicle battery management system of claim 1, wherein the first battery unit and the second battery unit are configured as separate modules in one battery pack.

### Claim 4 (depends on 1)

The vehicle battery management system of claim 1, wherein the second battery unit supplies power to an attachment attached to the electric vehicle and another vehicle.

### Claim 5 (depends on 1)

The vehicle battery management system of claim 1, wherein:
the controller supplies power supplied from the second battery unit to the motor or the first battery unit upon determining that the SOC of the first battery unit is insufficient in consideration of a range of the electric vehicle and a distance between a current location of the electric vehicle and a destination; and
the range is determined based on the SOC of the first battery unit.

### Claim 6 (depends on 5)

The vehicle battery management system of claim 5, wherein, when a destination of the electric vehicle is the electric charging station, the controller supplies power supplied from the second battery unit to the first battery unit or the motor.

### Claim 7 (depends on 5)

The vehicle battery management system of claim 5, wherein:
when a destination of the electric vehicle is not the electric charging station, the controller calculates an amount of power required for the electric vehicle to reach the destination; and
the controller supplies power supplied from the second battery unit to the first battery unit until the SOC of the first battery unit reaches the amount of power.

### Claim 8 (depends on 5)

The vehicle battery management system of claim 5, wherein:
when a destination of the electric vehicle is not the electric charging station, the controller calculates an amount of power required for the electric vehicle to reach the destination; and
the controller compares the SOC of the first battery unit with the amount of power and supplies an insufficient amount of power from the second battery unit to the motor.

### Claim 9 (depends on 1)

The vehicle battery management system of claim 1, wherein:
in a state in which the second battery unit supplies power to the outside of the electric vehicle, the controller determines a lower limit of charging of the first battery unit determined in consideration of a range of the electric vehicle and a distance between a current location of the electric vehicle and the electric charging station;
the range is determined based on the SOC of the first battery unit; and
the lower limit of charging is determined based on a minimum amount of power required for the electric vehicle to reach the electric charging station.

### Claim 10 (depends on 9)

The vehicle battery management system of claim 9, wherein the controller supplies power supplied from the first battery unit to the second battery unit or to the outside of the electric vehicle until the SOC of the first battery unit reaches the lower limit of charging.

### Claim 11 (depends on 1)

The vehicle battery management system of claim 1, further comprising:
a location recognition device configured to acquire information on a current location of the electric vehicle; and
a communication module configured to receive information on a location of the electric charging station,
wherein the controller determines a distance between a current location of the electric vehicle and the electric charging station based on information received from the location recognition device and the communication module.

### Claim 12 (depends on 11)

The vehicle battery management system of claim 11, wherein:
the communication module receives information on locations of a plurality of electric charging stations; and
the controller calculates a distance between each of the plurality of electric charging stations and the current location of the electric vehicle, and an amount of power required when the electric vehicle reaches each of the plurality of electric charging stations.

### Claim 13 (depends on 1)

The vehicle battery management system of claim 1, further comprising a communication module configured to transmit the SOC of each of the first battery unit and the second battery unit of the electric vehicle to an integrated control center.

### Claim 14 (depends on 13)

The vehicle battery management system of claim 13, wherein:
the integrated control center monitors an SOC of each of a plurality of electric vehicles and a location of each of a plurality of provided electric charging stations in real time; and
the integrated control center transmits a signal for a driving route for charging to the electric vehicles in consideration of an SOC of the first battery unit of each of the electric vehicles and the locations of the electric charging stations.

### Claim 15 (depends on 1)

The vehicle battery management system of claim 1, wherein the controller shares the SOC of the first battery unit with controllers of other electric vehicles within a preset distance.

### Claim 16 (depends on 15)

The vehicle battery management system of claim 15, wherein the controllers allocate the electric vehicles to a plurality of electric charging stations in consideration of the SOC of the first battery unit of each of the electric vehicles and locations of the electric charging stations.

### Claim 17 (depends on 16)

The vehicle battery management system of claim 16, wherein each of the controllers provides information on the SOC of the first battery unit to other surrounding controllers when the electric vehicles are started.