# US 2018/0323641 A1 · Portable power supply > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0323641 A1 - Document ID: US20180323641A1 - Status: Published application - Kind: A1 - Application number: 15/974,525 - Filed: 2018-05-08 - Published: 2018-11-08 - Earliest claimed: 2017-05-08 - Applicants: Tti (Macao Commercial Offshore) Limited - Inventors: Hei Man Raymond LEE; Yong Min LI - Web page: https://patentgrep.com/patent/US20180323641A1 ## CPC - H02J 7/70: characterised by the mechanical construction - H01M 50/247: specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers - H01M 50/256: Carrying devices, e.g. belts - H02J 7/04: Regulation of charging current or voltage - 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)} - H02J 7/50: acting upon multiple batteries simultaneously or sequentially - H02J 7/751: {concerning the insertion or the connection of the batteries} - H02J 9/061: {for DC powered loads} - H02J 9/062: {for AC powered loads} - B25F 5/02: Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - H02J 7/61: against overcharge - H02J 7/63: against overdischarge - H02J 2105/44: Portable electronic devices - H02J 2207/20: Charging or discharging characterised by the power electronics converter - H02J 2207/40: adapted for charging from various sources, e.g. AC, DC or multivoltage - Y02E 60/10: Energy storage using batteries - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)} - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A portable power supply assembly for power tool, the power supply operated on AC mains having a mains input comprises an AC-to-DC converter coupled between the mains input and a rechargeable battery unit, a DC-to-DC converter, wherein the rechargeable battery unit couples to an input of the DC-to-DC converter, a power inverter for converting direct current (DC) into alternating current (AC), a housing for enclosing the AC-to-DC converter, the rechargeable battery unit, the DC-to-DC converter and the power inverter, an AC outlet disposed on the housing. The rechargeable battery unit is connected between the AC-to-DC converter and the power inverter, a first-voltage DC power converted from the AC mains via the AC-to-DC converter is stored in the rechargeable battery unit, thereby supplies the first-voltage DC power to the power inverter and such that in use, the first-voltage DC power from the rechargeable battery unit is converted to AC output available at the AC outlet of the power supply by the power inverter. ## Claims ### Claim 1 A portable power supply operated on AC mains having a mains input, the portable power supply comprising: an AC-to-DC converter coupled between the mains input and a rechargeable battery unit; a DC-to-DC converter, wherein the rechargeable battery unit couples to an input of the DC-to-DC converter; a power inverter for converting direct current (DC) into alternating current (AC), a housing for enclosing the AC-to-DC converter, the rechargeable battery unit, the DC-to-DC converter and the power inverter; and an AC outlet disposed on the housing; wherein the rechargeable battery unit is connected between the AC-to-DC converter and the power inverter; a first-voltage DC power converted from the AC mains via the AC-to-DC converter is stored in the rechargeable battery unit, thereby supplies the first-voltage DC power to the power inverter and such that in use, the first-voltage DC power from the rechargeable battery unit is converted to AC output available at the AC outlet of the portable power supply by the power inverter. ### Claim 2 (depends on 1) The portable power supply as claimed in claim 1, wherein the DC-to-DC converter is bi-directional and converts the first-voltage DC power to a second-voltage DC power for charging one or more battery packs. ### Claim 3 (depends on 2) The portable power supply as claimed in claim 2, wherein the power supply is operable and switchable between a normal DC operation mode in which the first-voltage DC power is supplied to the bi-directional DC-to-DC converter converting the first-voltage DC power to the second-voltage DC power for charging the one or more battery packs, and a discharging mode in which the second-voltage DC power stored in the one or more battery packs and the first-voltage DC power stored in the rechargeable battery unit are released to an AC load connected to the power inverter. ### Claim 4 (depends on 3) The portable power supply as claimed in claim 3, wherein the power supply is configured to the discharging mode when the AC load is connected to the AC outlet, or to the normal DC operation mode when the AC load is not connected to the AC outlet. ### Claim 5 (depends on 1) The portable power supply as claimed in claim 1, wherein the AC-to-DC converter is a DC charger for charging the rechargeable battery unit. ### Claim 6 (depends on 1) The portable power supply as claimed in claim 1, wherein the housing includes a first DC outlet for connecting to DC load and supplying the first-voltage DC power from the rechargeable battery unit to the DC load. ### Claim 7 (depends on 6) The portable power supply as claimed in claim 6, wherein the housing includes a second DC outlet for connecting to other electric device and supplying the first-voltage DC power from the AC-to-DC converter to said other electric device. ### Claim 8 (canceled) ### Claim 9 (depends on 7) The portable power supply as claimed in claim 7, wherein the other electric device is portable electronic device such as mobile phones. ### Claim at position 10 10-15. (canceled) ### Claim 16 The portable power supply as claimed in clam 1, wherein the rechargeable battery unit is removably connected between the AC-to-DC converter and the power inverter. ### Claim 17 A kit comprising: a portable power supply including an AC-to-DC converter coupled between the mains input and a rechargeable battery unit, a DC-to-DC converter, wherein the rechargeable battery unit couples to an input of the DC-to-DC converter, a power inverter for converting direct current (DC) into alternating current (AC), a housing for enclosing the AC-to-DC converter, the rechargeable battery unit, the DC-to-DC converter and the power inverter, and an AC outlet disposed on the housing, wherein the rechargeable battery unit is connected between the AC-to-DC converter and the power inverter; a first-voltage DC power converted from the AC mains via the AC-to-DC converter is stored in the rechargeable battery unit, thereby supplies the first-voltage DC power to the power inverter and such that in use, the first-voltage DC power from the rechargeable battery unit is converted to AC output available at the AC outlet of the portable power supply by the power inverter; and one or more rechargeable battery packs. ### Claim 18 (depends on 17) The kit as claimed in claim 17 wherein the one or more rechargeable battery packs are used in DC power tools. ### Claim 19 (canceled) ### Claim 20 A portable direct current (DC) power supply operated on AC mains having a mains input, the portable DC power supply comprising: an AC-to-DC converter coupled between the mains input and a rechargeable battery unit; a DC-to-DC converter, wherein the rechargeable battery unit couples to an input of the DC-to-DC converter; a housing for enclosing the AC-to-DC converter, the rechargeable battery unit and the DC-to-DC converter; and a DC output terminal disposed on the housing outputting first-voltage DC power from the rechargeable battery unit; wherein the DC output terminal is connectable to a detachable DC-to-AC power inverter and supplies the first-voltage DC power to the power inverter and such that when the DC-to-AC power inverter is connected to the DC power supply, the first-voltage DC power from the DC output terminal is converted to AC output via the detachable power inverter. ### Claim 21 (depends on 20) The portable DC power supply as claimed in claim 20, wherein the DC-to-DC converter is bi-directional and converts the first-voltage DC power to a second-voltage DC power for charging one or more battery packs. ### Claim 22 (depends on 21) The portable DC power supply as claimed in claim 21, wherein the power supply is operable and switchable between a normal DC operation mode in which the first-voltage DC power is supplied to the bi-directional DC-to-DC converter converting the first-voltage DC power to the second-voltage DC power for charging the one or more battery packs, and a discharging mode in which the second-voltage DC power stored in the one or more battery packs and the first-voltage DC power stored in the rechargeable battery unit are released to an AC load connected to the detachable DC-to-AC power inverter connected to the DC output terminal. ### Claim at position 18 23-25. (canceled) ### Claim 26 (depends on 20) The DC power supply as claimed in claim 20, wherein the AC-to-DC converter is a DC charger for charging the rechargeable battery unit. ### Claim 27 (depends on 20) The DC power supply as claimed in claim 20, wherein the housing includes a first DC outlet for connecting to DC load and supplying the first-voltage DC power from the rechargeable battery unit to the DC load. ### Claim 28 (depends on 20) The DC power supply as claimed in claim 20, wherein the housing includes a second DC outlet for connecting to other electric device and supplying the first-voltage DC power from the AC-to-DC converter to the other electric device. ### Claim 29 (depends on 27) The DC power supply as claimed in claim 27, wherein the DC load is DC power tool. ### Claim 30 (depends on 28) The DC power supply as claimed in claim 28, wherein the other electric device is portable electronic devices such as mobile phones. ### Claim at position 24 31-34. (canceled) ### Claim 35 (depends on 20) The DC power supply as claimed in claim 20, wherein the rechargeable battery unit is removably connected between the AC-to-DC converter and the DC output terminal. ### Claim at position 26 36-39. (canceled)