# US 12,224,407 B2 · Battery pack and wireless linking system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,407 B2 - Document ID: US12224407B2 - Status: Granted - Kind: B2 - Application number: 17/059,265 - Filed: 2019-05-29 - Published: 2021-07-08 - Granted: 2025-02-11 - Earliest claimed: 2018-05-31 - Assignees: Koki Holdings Co., Ltd. - Applicants: Koki Holdings Co., Ltd. - Inventors: Satoshi Yamaguchi; Hiroyuki Hanawa; Tatsuya Ito; Kenta Harada; Hiromi Takahashi - Web page: https://patentgrep.com/patent/US12224407B2 ## CPC - H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)} - B23D 59/0064: {by suction} - B23Q 11/0046: {by sucking} - B25F 5/00: Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for - B25F 5/02: Construction of casings, bodies or handles {(B25F5/006, B25F5/008 take precedence)} - G08C 17/02: using a radio link - H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00) - H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) - H01M 50/247: specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers - H01M 50/569: Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals (battery terminal connectors with integrated measuring arrangements G01R31/364) - H01M 50/583: in response to current, e.g. fuses - H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries - H02J 7/40: characterised by the exchange of charge or discharge related data - H02J 7/42: with electronic devices having internal batteries, e.g. mobile phones - H02J 7/80: including monitoring or indicating arrangements - H02J 7/855: {with circuits adapted for supplying loads from the battery} - H01M 2010/4278: {Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller} - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B23D: PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR (making toothed gears or the like B23F; cutting metal by applying heat locally B23K; arrangements for copying or controlling B23Q) - B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT - 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)} - G08C: TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS (fluid pressure transmitting systems F15B; mechanical means for transferring the output of a sensing member into a different variable G01D5/00; mechanical control systems G05G) - 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 ## Abstract The present invention maintains compatibility with a power tool having no wireless connection function, and prevents malfunctions due to linked operation. A battery pack that supplies a driving power source to a power tool, said battery pack comprising: a wireless communication unit for communicating wirelessly with an external device; and a control unit that performs a first determination process to determine the state of a wireless communication connection with the external device, wherein when the control unit has determined in the first determination process that wireless communication has been established, the control unit transmits a linking command to the external device, and during a state in which the wireless communication has been established, the control unit can perform a communication connection cancellation process to cancel the wireless communication. ## Claims ### Claim 1 A battery pack that supplies a driving power source to a power tool, the battery pack comprising: a wireless communication unit, communicating wirelessly with an external device; a control unit; a first cell unit and a second unit in which a plurality of battery cells are connected in series; a first positive terminal and a first negative terminal connected with the first cell unit; and a second positive terminal and a second negative terminal connected with the second cell unit, wherein the battery pack is configured as being connectible with, as the power tool, one of a first power tool driven a first voltage and a second power tool driven a second voltage higher than the first voltage, wherein when the battery pack is connected to the first power tool, the first positive terminal and the second positive terminal, and the first negative terminal and the second negative terminal are configured to be respectively short-circuited by a tool-side positive terminal and a tool-side negative terminal of the first power tool, so that the first cell unit and the second cell unit are connected in parallel, or wherein when the battery pack is connected to the second power tool, the first positive terminal and the second negative terminal are configured to be respectively connected with a tool-side positive terminal and a tool-side negative terminal of the second power tool, and the second positive terminal and the first negative terminal are connected, so that the first cell unit and the second cell unit are connected in series. ### Claim 2 (depends on 1) The battery pack as claimed in claim 1, wherein, the control unit, performing a first determination process to determine a wireless communication connection state with the external device, and in a case where the control unit determines in the first determination process that wireless communication is established, the control unit transmits a linking command to the external device, and during a state in which the wireless communication is established, the control unit is able to perform a communication connection cancellation process to cancel the wireless communication. ### Claim 3 (depends on 2) The battery pack as claimed in claim 2, further comprising a terminal connected to the power tool, wherein during the state in which the wireless communication is established, in a case where a connection between the power tool and the terminal is canceled, the control unit executes the communication connection cancellation process. ### Claim 4 (depends on 3) The battery pack as claimed in claim 3, wherein the terminal is a terminal that supplies power from the battery pack to the power tool. ### Claim 5 (depends on 3) The battery pack as claimed in claim 3, wherein the control unit executes the communication connection cancellation process after a predetermined time from cancellation of the connection between the power tool and the terminal. ### Claim 6 (depends on 3) The battery pack as claimed in claim 3, further comprising a voltage detection circuit that detects a voltage of the terminal, wherein the control unit determines whether the connection between the power tool and the terminal is canceled based on a change of the voltage of the terminal. ### Claim 7 (depends on 6) The battery pack as claimed in claim 6, wherein the control unit is able to execute a second determination process that determines whether the voltage of the terminal is in a predetermined relation, and determines whether the connection between the power tool and the terminal is canceled through the second determination process. ### Claim 8 (depends on 3) The battery pack as claimed in claim 3, comprising a trigger detection circuit that detects a connection of the power tool to the battery pack, wherein the control unit determines whether the connection of the power tool is canceled by determining whether a signal for detecting reception of power being supplied from the power tool is no longer received from the trigger detection circuit. ### Claim 9 (depends on 2) The battery pack as claimed in claim 2, comprising an operated unit that receives an operation for controlling the wireless communication with respect to the battery back, wherein during the state in which the wireless communication is established, the control unit executes the communication connection cancellation process based on an operation performed with respect to the operated unit. ### Claim 10 (depends on 2) The battery pack as claimed in claim 2, wherein the control unit, as the communication connection cancellation process, transmits a wireless communication cancellation command that cancels the wireless communication to the external device. ### Claim 11 (depends on 2) The battery pack as claimed in claim 2, comprising: a communication connection terminal, connected with the control unit and provided for transmitting and receiving control information, wherein the battery pack is able to transmit the linking command to the external device regardless of whether a tool-side communication connection terminal of the power tool connectible with the communication connection terminal is provided. ### Claim 12 (depends on 2) The battery pack as claimed in claim 2, further comprising: a communication connection terminal, connected with the control unit, and provided to transmit and receive information, wherein the battery pack is configured as being connectible with, as the power tool, one of a first power tool having a tool-side communication connection terminal connectible with the communication connection terminal and a second power tool without the tool-side communication connection terminal, and the control unit is configured to be able to detect information of a connected power tool regardless of whether the battery pack is connected to either the first power tool or the second power tool, and when the information is detected, the control unit is configured to be able to transmit a linking command to the external device. ### Claim 13 (depends on 2) The battery pack as claimed in claim 2, further comprising: a detection unit, connected with the control unit, and provided for detecting driving of the power tool; and a communication connection terminal, connected with the control unit, and provided to transmit and receive information, wherein in a case where the communication connection terminal is connected with a tool-side communication connection terminal of the power tool, the control unit is configured to transmit and receive the information with the power tool via the communication connection terminal and the tool-side communication connection terminal, and in a case where a wireless communication between the wireless communication unit and the external device is established, the control unit is configured to input driving information of the power tool via the detection unit, instead of via the communication connection terminal, and transmit a linking command to the external device via the wireless communication unit. ### Claim 14 (depends on 1) A wireless linking system, having the battery pack as claimed in claim 1, a power tool, and an external device having a wireless communication function, wherein the power tool comprises: a power tool motor; a tip tool, driven by a driving force of the power tool; and a tool side connection terminal for connecting with the battery pack, the tool side connection terminal including the tool-side positive terminal and the tool-side negative terminal, the external device comprises: an external device motor; a device wireless communication unit for communicating wirelessly with the battery pack; and a device control unit, operating the external device motor based on a linking command received from the battery pack, and stopping an operation of the external device motor based on the communication connection cancellation process executed by the control unit. ### Claim 15 (depends on 14) The wireless linking system as claimed in claim 14, wherein the external device is a dust collector, the dust collector is able to switch between a linked mode in which a linked operation where the dust collector and the battery pack are linked is performed and a single mode in which the dust collector operates alone without linking with the battery pack, and in a case where the dust collector is set to the linked mode, the device control unit is configured to operate the external device motor when receiving the linking command from the battery pack, and in a case where the dust collector is set to the single mode, the device control unit is configured so as to not operate the external device motor due to the linking command. ### Claim 16 (depends on 1) The battery pack as claimed in claim 1, wherein the control unit is configured to establish the wireless communication connection between the wireless communication unit and the external device regardless of whether the battery pack is connected to either the first power tool or the second power tool. ### Claim 17 (depends on 16) The battery pack as claimed in claim 16, further comprising a communication switch operated by a user, wherein the control unit is configured to allow the wireless communication connection between the wireless communication unit and the external device when the communication switch is operated. ### Claim 18 (depends on 1) The battery pack as claimed in claim 1, comprising: a power circuit, supplying operation voltage to the control unit, wherein in a state that the first cell unit and the second cell unit are connected in series, the first cell unit is positioned at high voltage side than the second cell unit, and the power circuit is connected to the second cell unit. ### Claim 19 (depends on 1) A system, having the battery pack as claimed in claim 1, and the power tool connected with the battery pack and supplied the driving power source from the battery pack. ### Claim 20 (depends on 19) The system as claimed in claim 19, the power tool is at least one of the first power tool and the second power tool. ### Claim 21 A battery pack that supplies a driving power source to a power tool, the battery pack comprising: a wireless communication unit, communicating wirelessly with an external device; a control unit; a first cell unit and a second unit in which a plurality of battery cells are connected in series; a first positive terminal and a first negative terminal connected with the first cell unit; a second positive terminal and a second negative terminal connected with the second cell unit; a first cell unit protection circuit, for protecting the first cell unit; and a second cell unit protection circuit, for protecting the second cell unit, wherein the control unit receives signals input from the first cell unit protection circuit and the second cell unit protection circuit.