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公开(公告)号：US20240418756A1
公开(公告)日：2024-12-19
申请号：US18704199
申请日：2022-11-09
Applicant: Hilti Aktiengesellschaft
Inventor： Stefan MAYER , Klaus HAUSER , Mathias FRENZEL , David KOSCHECK
Abstract: A method for determining the conductivity of an electrical conductor between a first system component and a second system component, the method steps determining a first voltage value and a second voltage value at the first or second system component for a given current intensity value; determining a first differential value between a reference voltage value at the first system component and the first voltage value; determining a second differential value between a reference voltage value at the first system component and the second voltage value; identifying a transition resistance as a quotient from the second differential value and the current intensity value when a difference between the first and second differential values reaches a predetermined threshold value; and adjusting the first and/or second system component from a first operating state into a second operating state and/or emitting at least one signal by means of a display device on the first and/or second system component when the transition resistance reaches a predetermined threshold value.
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公开(公告)号：US20250010449A1
公开(公告)日：2025-01-09
申请号：US18705795
申请日：2022-11-10
Applicant: Hilti Aktiengesellschaft
Inventor： Mathias FRENZEL , David KOSCHECK , Klaus HAUSER , Stefan MAYER , Andreas GUGGEMOS , Franz MÖSSNANG
Abstract: Control method for a rechargeable battery that has an interface for communicating with a handheld power tool and for supplying power to the handheld power tool, wherein a machine characteristic value characterizing the handheld power tool is received via the interface of the rechargeable battery, the machine characteristic value representing at least one physical property of the handheld power tool, and the rechargeable battery being activated to deliver electrical energy to the handheld power tool if a logic circuit of the rechargeable battery determines that a system characteristic value, which is based on the machine characteristic value and on a rechargeable battery characteristic value representing a physical property of the rechargeable battery, exceeds or falls short of a predefined safety threshold.
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公开(公告)号：US20250018530A1
公开(公告)日：2025-01-16
申请号：US18714623
申请日：2022-11-11
Applicant: Hilti Aktiengesellschaft
Inventor： Ralf GREITMANN , Ralf MEIXNER , Stefan MAYER , John Van TAACK-TRAKRANEN , Mathias FRENZEL , Markus HOLUBARSCH , Klaus HAUSER
Abstract: A power tool having a motor and an energy supply device, wherein an output current from the energy supply device to the power tool is greater than or equal to 70 amperes. The power-to-weight ratio of the power tool is in a range of greater than or equal to 0.30 kW/kg, for example. In addition, a power-to-weight ratio L of the power tool can preferably be in a range of greater than or equal to 0.30 kW/kg. In addition, a contact system for transmitting electrical energy from the energy supply device to the power tool is disclosed, wherein the contact system has at least one first contact and at least one second contact, wherein a contact area between the two contacts has a size of greater than or equal to 20 mm2.
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公开(公告)号：US20250007680A1
公开(公告)日：2025-01-02
申请号：US18709560
申请日：2022-11-10
Applicant: Hilti Aktiengesellschaft
Inventor： Klaus HAUSER , Mathias FRENZEL , Markus HARTMANN , Robert STANGER
IPC: H04L5/16 , B25F5/00 , H01M10/42 , H01M50/247 , H04B1/40
Abstract: A power tool having at least one control device, wherein the power tool can be detachably connected to an energy supply device, wherein there is provision for at least one communication connection for the exchange of signals between a first transceiver and a second transceiver by using serial digital communication, wherein the energy supply device comprises at least one energy storage cell and the at least one cell has a nominal capacity of at least 1.5 ampere hours, and also a surface A and a volume V, the surface A of the at least one cell being greater than eight times the cube root of the square of the volume V of the at least one cell. A system that includes such a power tool and an energy supply device is also provided.
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