US 12,224,610 B2
Battery-operated device including an electromechanical interface for an interchangeable drive unit
Jing Sheng, Stuttgart (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 17/281,147
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Dec. 11, 2019, PCT No. PCT/EP2019/084578
§ 371(c)(1), (2) Date Mar. 29, 2021,
PCT Pub. No. WO2020/126728, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 102018222381.5 (DE), filed on Dec. 20, 2018.
Prior Publication US 2022/0123572 A1, Apr. 21, 2022
Int. Cl. H02J 7/00 (2006.01); A47L 7/00 (2006.01); A47L 9/28 (2006.01); B08B 15/04 (2006.01); B23B 45/02 (2006.01); H02J 50/10 (2016.01)
CPC H02J 7/0063 (2013.01) [A47L 7/0095 (2013.01); A47L 9/2873 (2013.01); A47L 9/2884 (2013.01); B08B 15/04 (2013.01); B23B 45/02 (2013.01); H02J 7/0042 (2013.01); H02J 7/0068 (2013.01); H02J 50/10 (2016.02)] 5 Claims
OG exemplary drawing
 
5. A battery-operated device, comprising:
a rechargeable battery; and
an interchangeable drive unit that is supplied with power by the rechargeable battery via an electromechanical interface;
wherein the rechargeable battery is chargeable via the electromechanical interface,
wherein the electromechanical interface includes at least two electrical contacts or a coil for supplying the interchangeable drive unit with power,
wherein a first contact of the at least two electric contacts of the electromechanical interface or the coil of the electromechanical interface, is connected to a drain or collector terminal of a first semiconductor switch and a second contact of the at least two electric contacts of the electromechanical interface or the coil of the electromechanical interface, is connected to a source or emitter terminal of the first semiconductor switch,
wherein a control unit detects a voltage drop via the first semiconductor switch or the coil and recognizes as a function of the voltage drop, whether the interchangeable drive unit or a charging device is connected to the electromechanical interface,
wherein the first semiconductor switch is part of a power output stage including at least one second semiconductor switch,
wherein a further semiconductor switch is connected in series to the power output stage, the control unit activating the first and second semiconductor switches of the power output stage and the further semiconductor switch in such a way that when the interchangeable drive unit is connected to the electromechanical interface, a power supply of the interchangeable drive unit takes place using the rechargeable battery and when the charging device is connected to the electromechanical interface, a charging of the rechargeable battery takes place.