# US 12,009,695 B2 · Power conversion system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,009,695 B2 - Document ID: US12009695B2 - Status: Granted - Kind: B2 - Application number: 17/886,305 - Filed: 2022-08-11 - Published: 2023-03-02 - Granted: 2024-06-11 - Earliest claimed: 2021-08-25 - Assignees: Delta Electronics, Inc. - Applicants: Delta Electronics, Inc. - Inventors: Jun Chen; Tsu-Hua Ai; Changyong Wang; Yansong Lu; Jun Liu - Web page: https://patentgrep.com/patent/US12009695B2 ## CPC - H02J 9/062: {for AC powered loads} - H02J 15/00: Systems for storing electric energy specially adapted for power networks - H02J 7/02: for charging batteries from AC mains by converters - H02J 7/04: Regulation of charging current or voltage - H02J 7/82: Control of state of charge [SOC] - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - Y02B 70/30: Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level - Y04S 20/20: End-user application control systems - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS - Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS ## Abstract A power conversion system is coupled between a power grid and a load. The power conversion system includes a battery, a first converter, a second converter and a DC/DC converter. The first converter is configured to selectively convert an input power from the power grid into a first charging power when the power grid is operated normally. The second converter is configured to convert the input power from the power grid into an output power when the power grid is operated normally. The DC/DC converter is electrically connected between the battery and the second converter. The DC/DC converter is configured to convert a storage power in the battery into a backup power when the power grid is not operated normally. ## Claims ### Claim 1 A power conversion system coupled between a first power grid, a second power grid and a load, the power conversion system comprising: a battery; a first converter electrically connected between the first power grid and the battery, configured to selectively convert a first input power from the first power grid into a first charging power when the first power grid is operated normally; and a second converter electrically connected between the second power grid and the load, configured to convert a second input power from the second power grid into an output power when the second power grid is operated normally, wherein the battery is electrically coupled with the second converter, and a backup power from the battery is converted into the output power by the second converter when the second power grid is not operated normally, wherein the first converter is a bidirectional converter, further configured to selectively convert the storage power in the battery into a feedback power, and the feedback power is provided to the first power grid. ### Claim 2 (depends on 1) The power conversion system according to claim 1, wherein the power conversion system further comprises a DC/DC converter, and the DC/DC converter is electrically connected between the battery and the second converter, configured to convert a storage power in the battery into the backup power when the second power grid is not operated normally, and the backup power is provided to the second converter. ### Claim 3 (depends on 2) The power conversion system according to claim 2, wherein the second input power is converted into a second charging power by the second converter, the second charging power is converted into a regulated DC voltage by the DC/DC converter, and the regulated DC voltage is provided to the battery to charge the battery. ### Claim 4 (depends on 2) The power conversion system according to claim 2, wherein the power conversion system further comprises a power management unit, the power management unit is coupled with the battery, the first converter and the second converter. ### Claim 5 (depends on 4) The power conversion system according to claim 4, wherein the power management unit receives an information about a residual electric quantity of the battery, and controls the first converter to convert the first input power into the first charging power when the residual electric quantity of the battery is equal to or lower than a preset electric quantity threshold. ### Claim 6 (depends on 4) The power conversion system according to claim 4, wherein the power management unit is further coupled with the DC/DC converter. ### Claim 7 (depends on 4) The power conversion system according to claim 4, wherein when a conversion condition is not satisfied, the power management unit controls the first converter to convert the first input power into the first charging power, and the battery is charged by the first charging power; and when the conversion condition is satisfied, the power management unit controls the first converter to convert the storage power of the battery into a feedback power, and the feedback power is provided to the first power grid. ### Claim 8 (depends on 7) The power conversion system according to claim 7, wherein the conversion condition is related to an electricity price of the first power grid. ### Claim 9 (depends on 2) The power conversion system according to claim 2, wherein a voltage value of the first power grid and a voltage value of the second power grid are different. ### Claim 10 (depends on 2) The power conversion system according to claim 2, wherein the second converter comprises: an AC/DC converter, wherein an AC side of the AC/DC converter is electrically connected with the second power grid; and a DC/AC converter, wherein a DC side of the DC/AC converter is electrically connected with a DC side of the AC/DC converter and a terminal of the DC/DC converter, and an AC side of the DC/AC converter is electrically connected with the load. ### Claim 11 (depends on 1) The power conversion system according to claim 1, wherein when the first power grid is operated normally, the first charging power is provided to the battery, and the output power is provided to the load.