US 11,679,487 B2
Battery pack and electric tool assembly
Yong Qiao, Suzhou (CN)
Assigned to Positec Power Tools (Suzhou) Co., Ltd, Suzhou (CN)
Appl. No. 16/649,390
Filed by Positec Power Tools (Suzhou) Co., Ltd, Suzhou (CN)
PCT Filed Sep. 25, 2018, PCT No. PCT/CN2018/107226
§ 371(c)(1), (2) Date Mar. 20, 2020,
PCT Pub. No. WO2019/057187, PCT Pub. Date Mar. 28, 2019.
Claims priority of application No. 201710866416.5 (CN), filed on Sep. 22, 2017.
Prior Publication US 2020/0251696 A1, Aug. 6, 2020
Int. Cl. H01M 50/296 (2021.01); B25F 5/02 (2006.01); H01M 50/271 (2021.01); H01M 50/213 (2021.01)
CPC B25F 5/02 (2013.01) [H01M 50/271 (2021.01); H01M 50/296 (2021.01); H01M 50/213 (2021.01); H01M 2220/30 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A battery pack, detachably coupled to an electric tool provided with housing terminals, the battery pack comprising:
a battery pack cover;
a battery pack base, joined to the battery pack cover to form a battery pack housing;
a cell group, configured to be charged and discharged, the cell group comprising several cells, and each cell being provided with a cell body portion, a first electrode terminal located on one side of the cell body portion, and a second electrode terminal located on the other side of the cell body portion;
a battery terminal connector, electrically connected to the cell group, the battery terminal connector comprising battery pack terminals electrically connectable to the housing terminals and a terminal base supporting the battery pack terminals;
a mounting cavity, defined in the battery pack housing, and accommodating the cell group and the battery terminal connector, the mounting cavity being formed with a socket for inserting the housing terminals to be electrically connected to the battery pack terminals; and
a lock configured to drive the battery pack and the electric tool to be in locked connection or released,
wherein a seal member blocking a passage from the socket to the cell group is disposed inside the mounting cavity,
wherein the battery pack further comprises a battery pack housing seal member blocking communication between the outside and the mounting cavity, and the battery pack housing seal member is disposed at a joint between the battery pack cover and the battery pack base,
wherein the seal member and battery pack housing seal member form waterproof seals,
wherein the lock is mounted on the battery pack housing, and the lock is isolated outside the mounting cavity, and
wherein the terminal base is constructed to be a waterproof box body, the waterproof box body is provided, in a direction facing the socket, with an opening for the housing terminals to pass through, and the seal member is sealed between an inner wall of the battery pack and the waterproof box body, to close an assembly gap between the waterproof box body and the inner wall of the battery pack.