# US 12,594,854 B2 · Battery control system, battery control method and electric vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,594,854 B2 - Document ID: US12594854B2 - Status: Granted - Kind: B2 - Application number: 18/007,671 - Filed: 2021-09-02 - Published: 2023-08-03 - Granted: 2026-04-07 - Earliest claimed: 2020-09-14 - Assignees: LG Energy Solution, Ltd. - Applicants: LG Energy Solution, Ltd. - Inventors: Yean-Sik Choi - Web page: https://patentgrep.com/patent/US12594854B2 ## CPC - B60L 58/10: for monitoring or controlling batteries - B60L 1/00: Supplying electric power to auxiliary equipment of vehicles (circuit arrangements for charging batteries H02J7/00) - B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors} - B60L 3/12: Recording operating variables {; Monitoring of operating variables} - B60L 50/66: {Arrangements of batteries} - B60L 2240/545: Temperature - B60L 2240/547: Voltage - B60L 2240/549: Current - B60L 2250/10: by alarm - 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 - Y02T 90/16: Information or communication technologies improving the operation of electric 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A battery control system according to the present disclosure is for an electric vehicle including a vehicle controller connected between a first node and a second node, a vehicle communication unit operably coupled to the vehicle controller, an electric motor connected between the second node and a third node, and a battery pack connected between a fourth node and the second node. The battery control system provides a sub power path between the battery pack and the vehicle controller prior to providing a main power path from the battery pack to the electric motor, in response to receiving an ignition signal for the electric vehicle. ## Claims ### Claim 1 A battery control system for an electric vehicle including a vehicle controller connected between a first node and a second node, a vehicle communicator operably coupled to the vehicle controller, an electric motor connected between the second node and a third node, and a battery pack connected between a fourth node and the second node, the battery control system comprising: a battery communicator configured to transmit a first request signal in response to an ignition signal for the electric vehicle; a first switch connected between the first node and the fourth node; a second switch connected between the first node and the third node; and a battery controller configured to turn on the first switch to provide a sub power path between the battery pack and the vehicle controller and transmit a notification signal including battery information of the battery pack, in response to the first request signal, if both the first switch and the second switch are turned off, wherein the battery communicator is further configured to transmit a second request signal including the battery information to the vehicle communicator in response to the notification signal. ### Claim 2 (depends on 1) The battery control system according to claim 1, wherein the battery communicator is coupled to the vehicle communicator through a near field communication channel. ### Claim 3 (depends on 1) The battery control system according to claim 1, wherein the battery information indicates at least one of a voltage, a temperature, or a state of charge of the battery pack at a point in time when the first request signal is received by the battery controller. ### Claim 4 (depends on 1) The battery control system according to claim 1, wherein the battery communicator is further configured to transmit a third request signal to the battery controller in response to a confirmation signal from the vehicle communicator after the second request signal is transmitted. ### Claim 5 (depends on 4) The battery control system according to claim 4, wherein the battery controller is further configured to turn on the second switch to provide a main power path from the battery pack to the electric motor in response to the third request signal. ### Claim 6 (depends on 1) The battery control system according to claim 1, wherein the battery controller is further configured to detect a battery current flowing through the battery pack after the first switch is turned on. ### Claim 7 (depends on 6) The battery control system according to claim 6, wherein the battery controller is further configured to transmit the notification signal to the vehicle communicator if the battery current is within a predetermined threshold current range. ### Claim 8 (depends on 6) The battery control system according to claim 6, wherein the battery controller is further configured to turn off the first switch if the battery current is outside of a predetermined threshold current range. ### Claim 9 (depends on 6) The battery control system according to claim 6, wherein the battery controller is further configured to transmit an error signal to the battery communicator if the battery current is outside of a predetermined threshold current range, the error signal indicating that an open circuit fault or a short circuit fault occurred in the sub power path. ### Claim 10 (depends on 1) An electric vehicle comprising the battery control system according to claim 1. ### Claim 11 A battery control method for an electric vehicle including a vehicle controller connected between a first node and a second node, a vehicle communicator operably coupled to the vehicle controller, an electric motor connected between the second node and a third node, and a battery pack connected between a fourth node and the second node, the battery control method comprising: transmitting the first request signal in response to an ignition signal for the electric vehicle; if both a first switch connected between the first node and the fourth node and a second switch connected between the first node and the third node are turned off, turning on the first switch to provide a sub power path between the battery pack and the vehicle controller in response to the first request signal; transmitting a notification signal including battery information of the battery pack after the first switch is turned on; and transmitting a second request signal including the battery information to the vehicle communicator in response to the notification signal. ### Claim 12 (depends on 11) The battery control method according to claim 11, further comprising: transmitting a third request signal to the battery controller in response to a confirmation signal from the vehicle communicator after the second request signal is transmitted; and turning on the second switch to provide a main power path from the battery pack to the electric motor in response to the third request signal. ### Claim 13 (depends on 11) The battery control method according to claim 11, further comprising: detecting a battery current flowing through the battery pack after the first switch is turned on. ### Claim 14 (depends on 13) The battery control method according to claim 13, wherein the transmitting of the notification signal includes transmitting the notification signal to the vehicle communicator if the battery current is within a predetermined threshold current range. ### Claim 15 (depends on 13) The battery control method according to claim 13, further comprising: turning off the first switch if the battery current is outside of a predetermined threshold current range. ### Claim 16 (depends on 13) The battery control method according to claim 13, further comprising: transmitting an error signal to the battery communicator if the battery current is outside of a predetermined threshold current range, the error signal indicating that an open circuit fault or a short circuit fault occurred in the sub power path.