# US 8,541,985 B1 · Multifunctional portable power bank > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,541,985 B1 - Document ID: US8541985B1 - Status: Granted - Kind: B1 - Application number: 13/686,513 - Filed: 2012-11-27 - Granted: 2013-09-24 - Earliest claimed: 2012-11-27 - Assignees: Gigastone America Corp - Applicants: Gigastone Corporation - Inventors: John Wong - Web page: https://patentgrep.com/patent/US8541985B1 ## CPC - G06F 1/1632: {External expansion units, e.g. docking stations} - 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 7/342: {The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging (with circuits for polarity protection H02J7/68)} - H04M 1/72409: by interfacing with external accessories (hands-free H04M1/60) - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries - Y02E 60/10: Energy storage using batteries - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A multifunctional portable power bank includes a main body having a circuit board and a battery arranged therein. The circuit board includes a first control unit, a second control unit connected to the first control unit, and a wireless transmission unit connected to the second control unit. The first control unit controls an input voltage of an external power supply and an output voltage of a battery power of the battery, and informs the second control unit to turn on. The second control unit enables a wireless access via the wireless transmission unit or an access via the Ethernet, and enables a router mode or a network service mode. With these arrangements, the multifunctional portable power bank not only enables data access via local or wireless networks, but also supplies electric power for charging other electronic products connected thereto. ## Claims ### Claim 1 A multifunctional portable power bank, comprising: a main body internally defining a chamber, in which a battery is mounted; and a circuit board being arranged in the chamber of the main body and connected to the battery; the circuit board including: a buck converter connected to a first connector and the battery; a booster connected to the battery and a second connector; a first control unit connected to the buck converter, the booster, a changeover switch, and an LED indicator; the first control unit controlling the buck converter to reduce an external power supply supplied thereto to a voltage matching that of a battery power of the battery; and controlling the booster to boost the battery power supplied thereto to a preset voltage; a second control unit connected to the first control unit and a wireless transmission unit; and the second control unit including a connection interface, an Ethernet interface, and a plurality of modules supporting network and file access for controlling network/cloud data transmission and access; an Ethernet connector connected to the Ethernet interface; a regulator connected to the battery and the second control unit; and the battery power being supplied to the second control unit and the wireless transmission unit via the regulator; and a connector unit connected to the connection interface of the second control unit, a flash memory and a third connector; the connector unit including a hub/switch and a controller; the hub/switch being connected to the controller and the third connector, and the controller being connected to the flash memory. ### Claim 2 (depends on 1) The multifunctional portable power bank as claimed in claim 1, wherein the main body includes an upper case and a lower case connected to each other to define the chamber therebetween; the upper case having a top wall and a plurality of sidewalls perpendicularly and downwardly extended from peripheral edges of the top wall; the top wall being provided with a push button corresponding to the changeover switch and a plurality of light-transmitting sections corresponding to the LED indicator; and one of the sidewalls being provided with a plurality of through holes corresponding to the first connector, the second connector, the third connector, and the Ethernet connector, respectively. ### Claim 3 (depends on 1) The multifunctional portable power bank as claimed in claim 1, wherein the first, second and third connectors are respectively a USB connector. ### Claim 4 (depends on 1) The multifunctional portable power bank as claimed in claim 1, wherein the connector unit is a USB connector unit, the hub/switch is a USB hub/switch, and the controller is a USB controller, and the connection interface is a USB connection interface. ### Claim 5 (depends on 1) The multifunctional portable power bank as claimed in claim 1, wherein the second connector is configured for connecting to a device to be charged. ### Claim 6 (depends on 1) The multifunctional portable power bank as claimed in claim 1, wherein the third connector is configured for connecting to an external storage device, and the second control unit using the external storage device as an expanded access device. ### Claim 7 (depends on 6) The multifunctional portable power bank as claimed in claim 6, wherein the external storage device is selected from the group consisting of a hard disk drive (HDD), a card reader, and a pen drive. ### Claim 8 (depends on 1) The multifunctional portable power bank as claimed in claim 1, wherein the plurality of modules supporting network and file access includes a server module, a router module, a cloud storage management module, a file system module, and an SSL (Secure Sockets Layer) module. ### Claim 9 (depends on 1) The multifunctional portable power bank as claimed in claim 1, wherein the first control unit and the second control unit are connected to each other via a bus. ### Claim 10 (depends on 1) The multifunctional portable power bank as claimed in claim 1, wherein the wireless transmission unit includes an antenna.