# US 11,451,086 B2 · Auxiliary power supply device and industrial machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,451,086 B2 - Document ID: US11451086B2 - Status: Granted - Kind: B2 - Application number: 17/067,672 - Filed: 2020-10-10 - Published: 2021-04-15 - Granted: 2022-09-20 - Earliest claimed: 2019-10-15 - Assignees: Fanuc Corporation - Applicants: Fanuc Corporation - Inventors: Taichi Taguchi; Youhei Kondou - Web page: https://patentgrep.com/patent/US11451086B2 ## CPC - H02J 9/061: {for DC powered loads} - H02J 9/062: {for AC powered loads} - G05B 19/4155: characterised by program execution, i.e. part program or machine function execution, e.g. selection of a program - H02J 7/34: Parallel operation in networks using both storage and other DC sources, e.g. providing buffering (H02J7/14 takes precedence) - G05B 2219/34013: Servocontroller - 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 - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) ## Abstract An auxiliary power supply device supplies electric power to an encoder when supply of electric power of a control device is cut off, and includes: a backup power source for supplying backup electric power to the encoder when supply of electric power of the control device is cut off; an auxiliary power source for supplying electric power to the encoder when the backup power source is removed; a remaining capacity determination unit for determining the remaining capacity of the auxiliary power source; a display unit for displaying an indication that the remaining capacity is insufficient when the remaining capacity determined by the remaining capacity determination unit is lower than a threshold; and a switch for actuating the display unit. ## Claims ### Claim 1 An auxiliary power supply device configured to supply electric power to an encoder when supply of electric power of a control device is cut off, comprising: a backup power source configured to supply backup electric power to the encoder when supply of electric power of the control device is cut off; an auxiliary power source configured to supply electric power to the encoder when the backup power source is removed; a remaining capacity determination unit configured to determine a remaining capacity of the auxiliary power source; a display unit configured to display an indication that the remaining capacity is insufficient when the remaining capacity determined by the remaining capacity determination unit is lower than a threshold; a switch configured to actuate the display unit; and a lock mechanism configured to prevent removal of the backup power source, wherein the lock mechanism is configured to be unlocked when the switch is operated so as to actuate the display unit. ### Claim 2 (depends on 1) The auxiliary power supply device according to claim 1, wherein the switch is a mechanical switch. ### Claim 3 (depends on 2) An industrial machine comprising the auxiliary power supply device according to claim 2. ### Claim 4 (depends on 1) An industrial machine comprising the auxiliary power supply device according to claim 1. ### Claim 5 (depends on 1) The auxiliary power supply device according to claim 1, further comprising a charging circuit that uses electrical power from a charging power supply to charge the backup power supply. ### Claim 6 (depends on 1) The auxiliary power supply device according to claim 1, further comprising a power supply switching circuit electrically connected to the backup power source, the encoder, and the auxiliary power source, wherein a higher voltage of output voltages of the backup power source and the auxiliary power source is supplied to the encoder by switching between the backup power source and the auxiliary power source via the power supply switching circuit. ### Claim 7 An industrial machine comprising: a control device configured to supply electric power to an encoder; and an auxiliary power supply device configured to supply electric power to the encoder when supply of electric power of the control device is cut off, wherein the auxiliary power supply device includes: a backup power source configured to supply backup electric power to the encoder when supply of electric power of the control device is cut off; an auxiliary power source configured to supply electric power to the encoder when the backup power source is removed; a remaining capacity determination unit configured to determine a remaining capacity of the auxiliary power source; a display unit configured to display an indication that the remaining capacity is insufficient when the remaining capacity determined by the remaining capacity determination unit is lower than a threshold; and a switch that is connected to the auxiliary power source and is configured, in an on state, to: supply output voltage from the auxiliary power source to the remaining capacity determination unit to actuate the remaining capacity determination unit; and supply output voltage from the auxiliary power source to the display unit to actuate the display unit. ### Claim 8 (depends on 7) The industrial machine according to claim 7, wherein the backup power source comprises a rechargeable battery. ### Claim 9 (depends on 7) The industrial machine according to claim 7, wherein the auxiliary power source comprises a non-rechargeable primary battery. ### Claim 10 (depends on 7) The industrial machine according to claim 7, wherein the backup power source comprises a rechargeable battery, and wherein the auxiliary power source comprises a non-rechargeable primary battery. ### Claim 11 (depends on 7) The industrial machine according to claim 7, wherein the auxiliary power source and the backup power source are separately connected to the encoder. ### Claim 12 (depends on 7) The industrial machine according to claim 7, wherein at least one of the auxiliary power source and the backup power source always supplies the electrical power to the encoder when supply of electric power of the control device is cut off. ### Claim 13 (depends on 7) The industrial machine according to claim 7, wherein the auxiliary power supply device includes: a base; a front panel fixed to the base; and a base body fixed to a rear side of the front panel. ### Claim 14 (depends on 13) The industrial machine according to claim 13, wherein the switch is attached to the front panel. ### Claim 15 (depends on 13) The industrial machine according to claim 13, wherein the backup power source is attached to an upper surface side of the base body, and wherein the auxiliary power source is attached to a lower surface side of the base body. ### Claim 16 (depends on 13) The industrial machine according to claim 13, wherein the backup power source and the auxiliary power source are fixedly attached to the base body. ### Claim 17 (depends on 13) The industrial machine according to claim 13, wherein the backup power source and the auxiliary power source are fixedly and separately attached to the base body such that the backup power source is removable independently of the auxiliary power source. ### Claim 18 (depends on 7) The industrial machine according to claim 7, further comprising a charging circuit configured to charge the backup power source. ### Claim 19 An industrial machine comprising: a control device configured to supply electric power to an encoder; and an auxiliary power supply device configured to supply electric power to the encoder when supply of electric power of the control device is cut off, wherein the auxiliary power supply device includes: a backup power source configured to supply backup electric power to the encoder when supply of electric power of the control device is cut off; an auxiliary power source configured to supply electric power to the encoder when the backup power source is removed; a remaining capacity determination unit configured to determine a remaining capacity of the auxiliary power source; a display unit configured to display an indication that the remaining capacity is insufficient when the remaining capacity determined by the remaining capacity determination unit is lower than a threshold; and a switch configured to actuate the display unit, wherein the backup power source is removable only when the display unit is actuated via the switch.