# US 2025/0096599 A1 · Elevator emergency power systems and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0096599 A1 - Document ID: US20250096599A1 - Status: Published application - Kind: A1 - Application number: 18/900,717 - Filed: 2024-09-28 - Published: 2025-03-20 - Earliest claimed: 2019-09-19 - Inventors: JUNKYEONG KIM; MINJUN SEO; Darin Morgan - Web page: https://patentgrep.com/patent/US20250096599A1 ## CPC - H02J 9/062: {for AC powered loads} - H02J 9/068: {Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection} - B66B 5/027: {to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door} - H02J 7/60: including safety or protection arrangements - H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)} - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - H02J 7/82: Control of state of charge [SOC] - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - B66B: ELEVATORS; ESCALATORS OR MOVING WALKWAYS ({apparatus for raising or lowering persons on theatrical stages or the like A63J5/12} ; funicular railbound systems with rigid ground-supported tracks and cable traction, e.g. cliff railways, B61B9/00; arrangements of ammunition handlers in vessels B63G3/00; hoists, lifts, or conveyors for loading or unloading in general B65G; braking or detent devices controlling normal movements of winding drums or barrels B66D; ship-lifting devices E02C; garages for many vehicles with mechanical means for lifting vehicles E04H6/12; hoists for feeding ammunition or projectiles to launching apparatus or to loading mechanisms F41A9/00) ## Abstract A system to supply emergency power to an elevator includes one or more lithium batteries, an inverter coupled to the lithium batteries, a battery management system (BMS) coupled to the inverter, an Energy Management Software (EMS) coupled to the BMS, and a relay coupled to utility power, wherein the relay operates to provide utility power to the system and notifies the EMS that utility power is on, wherein the EMS initiates charging of the BMS system, wherein the BMS sends charging command to the inverter, which operates until the state of charge is 100%, where the inverter goes into a standby mode. ## Claims ### Claim 1 A system to supply emergency power to an elevator, comprising: one or more lithium batteries, an inverter coupled to the lithium batteries, a battery management system (BMS) coupled to the inverter, an Energy Management Software (EMS) coupled to the BMS, and a relay coupled to utility power, wherein the relay operates to provide utility power to the system and notifies the EMS that utility power is on, wherein the EMS initiates charging of the BMS system, wherein the BMS sends charging command to the inverter, which operates until the state of charge is 100%, where the inverter goes into a standby mode. ### Claim 2 (depends on 1) The system of claim 1, comprising placing the BMS in charging mode while commercial or utility power is on. ### Claim 3 (depends on 2) The system of claim 2, comprising an undervoltage/phase imbalance relay energizing a contactor coil that closes a charging circuit. ### Claim 4 (depends on 1) The system of claim 1, wherein the inverter charges the batteries of the CEP unit until they reach 75% of their capacity. ### Claim 5 (depends on 1) The system of claim 1, wherein the inverter reports the SOC, SOH and temperature to the BMS for management. When the battery is charged, the BMS reports completion to the EMS. ### Claim 6 (depends on 1) The system of claim 1, wherein while commercial power is on, the elevator provides regenerative power and it reaches the BMS, the BMS charges the batteries up to 100% of their capacity and once batteries reach 100% charge capacity, the EMS (energy management system) connects a resistor bank to the charging circuit if regenerative power is created by elevator. ### Claim 7 (depends on 1) The system of claim 1, wherein when commercial power is lost, the undervoltage/phase imbalance relay de-energizes a charging contactor circuit, while energizing a contactor coil that closes a discharging circuit from the BMS to an automatic transfer switch (ATS), which feeds the elevator and an ancillary load. ### Claim 8 (depends on 7) The system of claim 7, wherein the ATS switches from the primary position to the secondary position to operate the elevator and ancillary loads where there is no utility power. ### Claim 9 (depends on 7) The system of claim 7, wherein when commercial power is restored, the undervoltage/phase imbalance relay de-energizes the discharging circuit and re-energizes charging circuit of the BMS and the ATS switches from the secondary position to the primary position. ### Claim 10 (depends on 1) The system of claim 1, comprising a circuit to shutdown the system if a thermal switch of a resistor bank opens, a state of charge (SOC) is less than or equal to 5% of battery capacity, or a threshold temperature is met. ### Claim 11 A method to supply emergency power to an elevator having one or more lithium batteries, an inverter coupled to the lithium batteries, a battery management system (BMS) coupled to the inverter, an Energy Management Software (EMS) coupled to the BMS, and a relay coupled to utility power, the method comprising: operating the relay operates to provide utility power to the system and notifying the EMS that utility power is on, wherein the EMS initiates charging of the BMS system, wherein the BMS sends charging command to the inverter, which operates until the state of charge is 100%, where the inverter goes into a standby mode providing emergency power during utility power outages permitting the elevator to function with a sequence of operations is for elevators with regenerative power and includes an integrated electrical and communication single line diagram and four operation profiles. ### Claim 12 (depends on 11) The method of claim 11, comprising placing the BMS in charging mode while commercial or utility power is on. ### Claim 13 (depends on 12) The method of claim 12, comprising an undervoltage/phase imbalance relay energizing a contactor coil that closes a charging circuit. ### Claim 14 (depends on 11) The method of claim 11, wherein the inverter charges the batteries of the CEP unit until they reach 75% of their capacity. ### Claim 15 (depends on 11) The method of claim 11, wherein the inverter reports the SOC, SOH and temperature to the BMS for management. When the battery is charged, the BMS reports completion to the EMS. ### Claim 16 (depends on 11) The method of claim 11, wherein while commercial power is on, the elevator provides regenerative power and it reaches the BMS, the BMS charges the batteries up to 100% of their capacity and once batteries reach 100% charge capacity, the EMS (energy management system) connects a resistor bank to the charging circuit if regenerative power is created by elevator. ### Claim 17 (depends on 1) The method of claim 1, wherein when commercial power is lost, the undervoltage/phase imbalance relay de-energizes a charging contactor circuit, while energizing a contactor coil that closes a discharging circuit from the BMS to an automatic transfer switch (ATS), which feeds the elevator and an ancillary load. ### Claim 18 (depends on 17) The method of claim 17, wherein the ATS switches from the primary position to the secondary position to operate the elevator and ancillary loads where there is no utility power. ### Claim 19 (depends on 17) The method of claim 17, wherein when commercial power is restored, the undervoltage/phase imbalance relay de-energizes the discharging circuit and re-energizes charging circuit of the BMS and the ATS switches from the secondary position to the primary position. ### Claim 20 (depends on 11) The method of claim 11, comprising performing system shutdown if a thermal switch of a resistor bank opens, a state of charge (SOC) is less than or equal to 5% of battery capacity, or a threshold temperature is met.