# US 2022/0037898 A1 · Controller, electricity storage system, and recording medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0037898 A1 - Document ID: US20220037898A1 - Status: Published application - Kind: A1 - Application number: 16/610,069 - Filed: 2018-05-14 - Published: 2022-02-03 - Earliest claimed: 2017-05-19 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Senichi ONODA; Yoshikatsu ITO; Satoshi SUGIMOTO - Web page: https://patentgrep.com/patent/US20220037898A1 ## CPC - H02J 3/32: using batteries or super capacitors with converting means - G08B 5/22: using electric transmission; using electromagnetic transmission - H02J 3/38: Arrangements for feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel - H02J 3/46: Controlling the sharing of generated power between the generators, sources or networks - H02J 7/35: with light sensitive cells - H02J 13/00: Circuit arrangements for providing remote monitoring or remote control of equipment in a power distribution network - H02S 10/20: Systems characterised by their energy storage means (H02S40/38 takes precedence) - Y02E 40/70: Smart grids as climate change mitigation technology in the energy generation sector - Y02E 60/00: Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation - Y04S 10/123: the energy generation units being or involving renewable energy sources - Y04S 10/14: Energy storage units - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS - H02S: GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES (obtaining electrical energy from radioactive sources G21H1/12; light sensitive inorganic semiconductor devices H10F; light sensitive organic semiconductor devices H10K30/00; thermoelectric devices H10N10/00; pyroelectric devices H10N15/00) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - 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 controller in an electricity storage system that includes a first DC/DC converter connected to a storage battery, and a bidirectional inverter connected to the first DC/DC converter. The controller includes a control circuit which changes a content to be displayed by a display, according to whether the electricity storage system is in a predetermined state in which a first PV is connected to the bidirectional inverter via a DC bus. ## Claims ### Claim 1 A controller in an electricity storage system that includes a first DC/DC converter connected to a storage battery, and a bidirectional inverter connected to the first DC/DC converter, the controller comprising: a control circuit which changes a content to be displayed by a display connected with the controller, according to whether the electricity storage system is in a predetermined state in which a solar cell module is connected to the bidirectional inverter via a DC bus. ### Claim 2 (depends on 1) The controller according to claim 1, further comprising: the display. ### Claim 3 (depends on 1) The controller according to claim 1, wherein the control circuit: causes the display to display an amount of electric power generated by the solar cell module as an indication regarding the amount of the electric power generated by the solar cell module, when the electricity storage system is in the predetermined state; and causes the display to display a fixed value as the indication regarding the amount of the electric power generated by the solar cell module, when the electricity storage system is not in the predetermined state. ### Claim 4 (depends on 1) The controller according to a claim 1, wherein the control circuit: causes the display to display an indication for checking whether a state of connection between the solar cell module and a second DC/DC converter that is connected between the solar cell module and the bidirectional inverter is normal, when the electricity storage system is in the predetermined state; and causes the display not to display the indication for checking whether the state of the connection between the solar cell module and the second DC/DC converter is normal, when the electricity storage system is not in the predetermined state. ### Claim 5 (depends on 1) The controller according to claim 1, further comprising: a communication unit, wherein the control circuit: causes the display to display an image for setting a signal to be received via the communication unit, when the electricity storage system is in the predetermined state, the signal indicating an instruction for reducing an amount of electric power that flows in a reverse direction into a system power source; and causes the display not to display the image for setting the signal to be received via the communication unit, when the electricity storage system is not in the predetermined state. ### Claim 6 (depends on 1) The controller according to claim 1, wherein when a voltage of at least a reference value is detected in a terminal which connects the second DC/DC converter and the solar cell module, the control circuit causes the display to display an indication showing that the voltage of at least the reference value is detected, when the electricity storage system is not in the predetermined state. ### Claim 7 (depends on 1) An electricity storage system, comprising: the controller according to claim 1;; the first DC/DC converter; the bidirectional inverter; and a second DC/DC converter connected between the solar cell module and the bidirectional inverter. ### Claim 8 A non-transitory computer-readable recording medium in which a program for causing a computer to execute a control method for controlling an electricity storage system that includes a first DC/DC converter connected to a storage battery, and a bidirectional inverter connected to the first DC/DC converter is recorded, the control method including: changing a content to be displayed by a display, according to whether the electricity storage system is in a predetermined state in which a solar cell module is connected to the bidirectional inverter via a DC bus.