# US 2014/0197686 A1 · Battery system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197686 A1 - Document ID: US20140197686A1 - Status: Published application - Kind: A1 - Application number: 14/234,297 - Filed: 2012-07-24 - Published: 2014-07-17 - Earliest claimed: 2011-07-28 - Assignees: Mitsubishi Heavy Industries, Ltd. - Inventors: Yasuaki Hiramura; Naoki Sonoda - Web page: https://patentgrep.com/patent/US20140197686A1 ## CPC - B60L 3/003: {relating to inverters} - B60L 50/51: characterised by AC-motors - B60L 53/52: Wind-driven generators - B60L 58/22: Balancing the charge of battery modules - H01M 10/441: {for several batteries or cells simultaneously or sequentially} - H02J 4/25: for transfer of electric power between AC and DC networks, e.g. for supplying the DC section within a load from an AC mains system - H02J 7/02: for charging batteries from AC mains by converters - H02J 7/34: Parallel operation in networks using both storage and other DC sources, e.g. providing buffering (H02J7/14 takes precedence) - H02J 7/50: acting upon multiple batteries simultaneously or sequentially - H02J 7/56: Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters - H02J 7/80: including monitoring or indicating arrangements - B60L 2210/10: DC to DC converters - B60L 2210/30: AC to DC converters - B60L 2240/547: Voltage - B60L 2240/549: Current - H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H02J 7/35: with light sensitive cells - H02J 7/82: Control of state of charge [SOC] - H02J 2101/28: Wind energy - H02J 2105/37: exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] - Y02E 10/76: Power conversion electric or electronic aspects - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y02T 10/72: Electric energy management in electromobility - Y02T 90/12: Electric charging stations - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A battery system includes a power supply device which supplies power, a battery device in which a plurality of substantially identical battery units are connected in parallel, and a control device including a storage unit which stores information about a reference power value corresponding to predetermined conversion efficiency of the power conversion unit, an acquisition unit which acquires information about a supply power amount of the power supplied by the power supply device, and a selection unit which determines the number of battery units capable of distributing the supply power amount at a power amount greater than or equal to the reference power value and selects the battery units to which the power is supplied from the power supply device among the plurality of battery units, wherein the selected battery units are equal in number to the determined number. ## Claims ### Claim 1 A battery system comprising: a power supply device which supplies power; a battery device in which a plurality of substantially identical battery units are connected in parallel, wherein each battery unit includes a power conversion unit which converts the power supplied from the power supply device and a battery module which is charged with power converted by the power conversion unit; and a control device including a storage unit which stores information about a reference power value corresponding to predetermined power conversion efficiency of the power conversion unit, an acquisition unit which acquires information about a supply power amount of the power supplied by the power supply device, and a selection unit which determines the number of battery units capable of distributing the supply power amount at a power amount greater than or equal to the reference power value based on the information about the reference power value stored in the storage unit and the information about the supply power amount acquired by the acquisition unit and selects the battery units to which the power is supplied from the power supply device among the plurality of battery units, wherein the selected battery units are equal in number to the determined number. ### Claim 2 (depends on 1) The battery system according to claim 1, wherein the acquisition unit acquires charging information representing a charging state of the battery module provided in each of the plurality of battery units, and wherein the selection unit determines the number of battery units capable of distributing the supply power amount at a power amount greater than or equal to the reference power value based on the information about the reference power value stored in the storage unit and the information about the supply power amount and the charging information acquired by the acquisition unit, and selects the battery units to which the power is supplied from the power supply device among the plurality of battery units, wherein the selected battery units are equal in number to the determined number. ### Claim 3 (depends on 2) The battery system according to claim 2, wherein, when the supply power amount is less than a sum of reference power values of the plurality of battery units, the selection unit determines priority for supplying the power to the battery unit in ascending order of charging state based on the charging information acquired by the acquisition unit, determines the number of battery units capable of distributing the supply power amount at a power amount greater than or equal to the reference power value based on the information about the reference power value stored in the storage unit and the information about the supply power amount and the charging information acquired by the acquisition unit, and selects the battery units equal in number to the determined number according to the priority. ### Claim 4 (depends on 3) The battery system according to claim 3, wherein the control device includes a switching unit through which the power supplied from the power supply device is supplied to the battery unit selected by the selection unit and having the battery module of the same or substantially same charging state by alternately switching at least two battery units having the same or substantially same charging state when the charging state of the battery module provided in at least one battery unit among the battery units selected by the selection unit is the same as or substantially the same as the charging state of the battery module provided in at least one battery unit among the battery units which are not selected by the selection unit. ### Claim 5 (depends on 1) The battery system according to claim 1, wherein the acquisition unit acquires the information about the supply power anmount of the power supplied by the power supply device at a predetermined timing. ### Claim 6 (depends on 1) The battery system according to claim 1, wherein the predetermined power conversion efficiency is maximum power conversion efficiency in the power conversion unit. ### Claim 7 (depends on 5) The battery system according to claim 5, wherein the predetermined power conversion efficiency is maximum power conversion efficiency in the power conversion unit. ### Claim 8 (depends on 2) The battery system according to claim 2, wherein the acquisition unit acquires the information about the supply power amount of the power supplied by the power supply device at a predetermined timing. ### Claim 9 (depends on 3) The battery system according to claim 3, wherein the acquisition unit acquires the information about the supply power amount of the power supplied by the power supply device at a predetermined timing. ### Claim 10 (depends on 4) The battery system according to claim 4, wherein the acquisition unit acquires the information about the supply power amount of the power supplied by the power supply device at a predetermined timing. ### Claim 11 (depends on 2) The battery system according to claim 2, wherein the predetermined power conversion efficiency is maximum power conversion efficiency in the power conversion unit. ### Claim 12 (depends on 3) The battery system according to claim 3, wherein the predetermined power conversion efficiency is maximum power conversion efficiency in the power conversion unit. ### Claim 13 (depends on 4) The battery system according to claim 4, wherein the predetermined power conversion efficiency is maximum power conversion efficiency in the power conversion unit. ### Claim 14 (depends on 8) The battery system according to claim 8, wherein the predetermined power conversion efficiency is maximum power conversion efficiency in the power conversion unit. ### Claim 15 (depends on 9) The battery system according to claim 9, wherein the predetermined power conversion efficiency is maximum power conversion efficiency in the power conversion unit. ### Claim 16 (depends on 10) The battery system according to claim 10, wherein the predetermined power conversion efficiency is maximum power conversion efficiency in the power conversion unit.