US 12,269,154 B2
Battery-operated handheld power tool, battery unit for a handheld power tool, system with the handheld power tool and a battery unit, charging device for a battery unit and system with a battery unit and a charging device
Kevin Kuhlmann, Kaufering (DE)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Appl. No. 18/037,643
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed Nov. 9, 2021, PCT No. PCT/EP2021/081065
§ 371(c)(1), (2) Date May 18, 2023,
PCT Pub. No. WO2022/111989, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 20210374 (EP), filed on Nov. 27, 2020.
Prior Publication US 2023/0405784 A1, Dec. 21, 2023
Int. Cl. B25F 5/00 (2006.01); H01M 10/0525 (2010.01); H01M 10/46 (2006.01); H01M 50/247 (2021.01); H01M 50/51 (2021.01); H02J 7/00 (2006.01)
CPC B25F 5/00 (2013.01) [H01M 10/0525 (2013.01); H01M 10/46 (2013.01); H01M 50/247 (2021.01); H01M 50/51 (2021.01); H02J 7/0024 (2013.01); H01M 2220/30 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A system comprising:
at least one battery unit including a first cell arrangement and a second cell arrangement; and
a battery-operated handheld power tool including:
a receiving bay for releasably receiving the at least one battery unit, the receiving bay having first, second, third and fourth electrical contacts for making contact with at least four corresponding contacts of the at least one battery unit, wherein a load of the handheld power tool is connected between the first electrical contact and the fourth electrical contact; and
a switch switchable to an open switching state and a closed switching state, the switch being connected between the second electrical contact and the third electrical contact, the switch connecting the first cell arrangement in series with the second cell arrangement, wherein the switch includes a semiconductor component including two MOSFETs connected in series with opposite polarity;
wherein the at least four corresponding contacts of the at least one battery unit are arranged in pairs, and wherein a respective pair of the at least four corresponding contacts of the at least one battery unit are connected to an associated one of the first and second cell arrangements.