US 12,230,818 B1
Voltage-reduced lithium battery and manufacturing method thereof
Changjun Yang, Guangdong (CN); Jian Zhao, Guangdong (CN); Pengfei Xiao, Guangdong (CN); Wei Zhou, Guangdong (CN); Guohao Xu, Guangdong (CN); Qiang Hou, Guangdong (CN); and Hong Xiao, Guangdong (CN)
Assigned to Hamedata Technology Co., Limited, Guangdong (CN)
Filed by Hamedata Technology Co., Limited, Guangdong (CN)
Filed on Jul. 30, 2024, as Appl. No. 18/788,261.
Application 18/788,261 is a continuation of application No. PCT/CN2024/096956, filed on Jun. 3, 2024.
Claims priority of application No. 202410409919.X (CN), filed on Apr. 7, 2024.
Int. Cl. H01M 50/186 (2021.01); H01M 10/052 (2010.01); H01M 10/0587 (2010.01); H01M 10/46 (2006.01); H01M 50/107 (2021.01); H01M 50/119 (2021.01); H01M 50/184 (2021.01); H01M 50/528 (2021.01); H01M 50/536 (2021.01)
CPC H01M 50/186 (2021.01) [H01M 10/052 (2013.01); H01M 10/0587 (2013.01); H01M 10/46 (2013.01); H01M 50/107 (2021.01); H01M 50/119 (2021.01); H01M 50/184 (2021.01); H01M 50/528 (2021.01); H01M 50/536 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A voltage-reduced lithium battery, comprising a circuit assembly, a plastic frame, a wound battery core assembly, a first metal housing, a second metal housing, an insulating seal and an insulating sheath, wherein the circuit assembly and the plastic frame are arranged in the first metal housing, the plastic frame is configured to fix the circuit assembly, the wound battery core assembly is arranged in the second metal housing, the first metal housing and the second metal housing are docked and fixed by circumferential welding, the insulating seal is arranged between the first metal housing and the second metal housing and configured to seal the second metal housing, and the insulating sheath covers the first metal housing and the second metal housing;
wherein a horizontal sealing portion extends inwardly from a bottom of the insulating seal, and the horizontal sealing portion is attached to a lower surface of the first metal housing to improve a sealing performance between the horizontal sealing portion and the first metal housing;
wherein a positioning hole is formed in a bottom wall of the first metal housing, a metal screw is arranged at the positioning hole, the metal screw is fixed at the positioning hole by a plastic nut, the horizontal sealing portion extends between the metal screw and the bottom wall of the first metal housing and is configured to insulate the metal screw relative to the first metal housing, and the metal screw is also configured to seal the positioning hole; and
wherein the circuit assembly comprises a printed circuit board (PCB), a low-voltage positive cap, a high-voltage positive connecting piece, a low-voltage positive elastic connecting piece and a negative elastic sheet, the low-voltage positive elastic connecting piece, the high-voltage positive connecting piece and the negative elastic sheet are welded on the PCB, the negative elastic sheet is in elastic contact with the first metal housing, the high-voltage positive connecting piece is in elastic contact with an upper end of the metal screw, a positive tab of the wound battery core assembly is welded to a lower end of the metal screw, a negative tab of the wound battery core assembly is welded to the second metal housing, the low-voltage positive cap is arranged on the plastic frame, and the low-voltage positive elastic connecting piece is in elastic contact with the low-voltage positive cap.