# US 12,184,117 B2 · Uninterruptible power supply, on-off control module, control method, and system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,184,117 B2 - Document ID: US12184117B2 - Status: Granted - Kind: B2 - Application number: 18/161,336 - Filed: 2023-01-30 - Published: 2023-06-08 - Granted: 2024-12-31 - Earliest claimed: 2020-07-31 - Assignees: Huawei Digital Power Technologies Co., Ltd. - Applicants: Huawei Digital Power Technologies Co., Ltd. - Inventors: Chuntao Zhang - Web page: https://patentgrep.com/patent/US12184117B2 ## CPC - H02J 9/062: {for AC powered loads} - H02M 5/4585: {having a rectifier with controlled elements} - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) ## Abstract This application provides an uninterruptible power supply. An input end of the uninterruptible power supply is connected to a power supply by using a first on-off control module. A controller of the uninterruptible power supply is configured to: after receiving a first control signal sent by the first on-off control module, control a current in a circuit connecting the uninterruptible power supply and the first on-off control module to be zero. An output end of the uninterruptible power supply is connected to a load by using a second on-off control module. A controller of the uninterruptible power supply is configured to: after receiving a second control signal sent by the second on-off control module, control the uninterruptible power supply to be turned off. ## Claims ### Claim 1 An uninterruptible power supply, wherein an input end of the uninterruptible power supply is connected to a power supply through a first on-off control circuit, and the uninterruptible power supply comprises: a controller; a rectifier; a main circuit switch connected between the rectifier and the input end of the uninterruptible power supply; an inverter; and a battery; wherein the rectifier is configured to convert an alternating current provided by the power supply into a direct current and transmit the direct current to the battery and the inverter; wherein the inverter is configured to convert the direct current into an alternating current; wherein the battery is configured to output the direct current to the inverter when the rectifier stops operating normally; and wherein the controller is configured to: when the rectifier operates normally and a first control signal sent by the first on-off control circuit is received by the controller, control the rectifier to stop operating and the main circuit switch to be open, wherein after the rectifier stops operating and the main circuit switch is open, the battery outputs the direct current to the inverter, and the current in the circuit connecting the uninterruptible power supply and the first on-off control circuit is zero. ### Claim 2 (depends on 1) The uninterruptible power supply according to claim 1, further comprising: a bypass circuit, wherein a first end of the bypass circuit is connected to an input end of the main circuit switch, and a second end of the bypass circuit is connected to an output end of the inverter; wherein the bypass circuit is configured to: when enabled, enable the input power supply to directly supply power to a load; and wherein the controller is configured to: when the bypass circuit is enabled and the first control signal sent by the first on-off control circuit is received by the controller, control the bypass circuit to be disconnected, wherein when the bypass circuit is disconnected the current in the circuit connecting the uninterruptible power supply and the first on-off control circuit is zero. ### Claim 3 (depends on 1) The uninterruptible power supply according to claim 1, wherein controlling the current in the circuit connecting the uninterruptible power supply and the first on-off control circuit to be zero comprises controlling the uninterruptible power supply to stop operating. ### Claim 4 (depends on 1) The uninterruptible power supply according to claim 1, wherein controlling the current in the circuit connecting the uninterruptible power supply and the first on-off control circuit to be zero comprises controlling the uninterruptible power supply to supply power to a load using the battery instead of the power supply. ### Claim 5 An on-off control circuit, wherein a first end of the on-off control circuit is connected to an uninterruptible power supply, and a second end of the on-off control circuit is connected to a power supply; and wherein the on-off control circuit is configured to: send a first control signal to the uninterruptible power supply; and switch to a disconnected state when determining that a current in a circuit connecting the on-off control circuit to the uninterruptible power supply is zero, wherein the first control signal indicates to a controller of the uninterruptible power supply to control the current in the circuit connecting the uninterruptible power supply and a first on-off control circuit to be zero, and wherein the current in the circuit is zero after a main circuit switch connected between a rectifier of the uninterruptible power supply and an input end of the uninterruptible power supply is switched to be open in response to the first control signal. ### Claim 6 (depends on 5) The on-off control circuit according to claim 5, wherein the on-off control circuit comprises: a fuse. ### Claim 7 (depends on 5) The on-off control circuit according to claim 5, wherein the on-off control circuit comprises: a plug-in terminal. ### Claim 8 (depends on 5) The on-off control circuit according to claim 5, wherein the on-off control circuit comprises: an isolating switch. ### Claim 9 An uninterruptible power supply system, comprising: an uninterruptible power supply comprising: a controller; a rectifier; a main circuit switch connected between the rectifier and an input end of the uninterruptible power supply; an inverter; and a battery; and a first on-off control circuit; wherein the input end of the uninterruptible power supply is connected to a power supply using the first on-off control circuit; and wherein the rectifier is configured to convert an alternating current provided by the power supply into a direct current and transmit the direct current to the battery and the inverter; wherein the inverter is configured to convert the direct current into an alternating current; wherein the battery is configured to output the direct current to the inverter when the rectifier stops operating normally; and wherein the controller is configured to: when the rectifier operates normally and a first control signal sent by the first on-off control circuit is received by the controller, control the rectifier to stop operating and the main circuit switch to be open, wherein after the rectifier stops operating and the main circuit switch is open, the battery outputs the direct current to the inverter, and the current in the circuit connecting the uninterruptible power supply and the first on-off control circuit is zero; and wherein a first end of the first on-off control circuit is connected to the uninterruptible power supply, and a second end of the first on-off control circuit is connected to the power supply; and wherein the first on-off control circuit is configured to: send the first control signal to the uninterruptible power supply; and switch to a disconnected state when determining that the current in the circuit connecting the uninterruptible power supply is zero, wherein the first control signal indicates to the controller to control the current in the circuit connecting the uninterruptible power supply and the first on-off control circuit to be zero. ### Claim 10 (depends on 9) The uninterruptible power supply system according to claim 9, wherein the uninterruptible power supply further comprises a bypass circuit; wherein a first end of the bypass circuit is connected to an input end of the main circuit switch, and a second end of the bypass circuit is connected to an output end of the inverter; wherein the bypass circuit is configured to: when enabled, enable the input power supply to directly supply power to a load; and wherein the controller is configured to: after the bypass circuit is enabled and the first control signal sent by the first on-off control circuit is received, control the bypass circuit to be disconnected, wherein when the bypass circuit is disconnected the current in the circuit connecting the uninterruptible power supply and the first on-off control circuit is zero. ### Claim 11 (depends on 9) The uninterruptible power supply system according to claim 9, wherein the on-off control circuit comprises: a fuse. ### Claim 12 (depends on 9) The uninterruptible power supply system according to claim 9, wherein the on-off control circuit comprises: a plug-in terminal. ### Claim 13 (depends on 9) The uninterruptible power supply system according to claim 9, wherein the on-off control circuit comprises: an isolating switch. ### Claim 14 (depends on 9) The uninterruptible power supply system according to claim 9, further comprising: a second on-off control circuit, wherein an output end of the uninterruptible power supply is connected to a load using the second on-off control circuit. ### Claim 15 (depends on 14) The uninterruptible power supply system according to claim 14, wherein the second on-off control circuit comprises: a fuse. ### Claim 16 (depends on 14) The on-off control circuit according to claim 14, wherein the second on-off control circuit comprises: an isolating switch.