US 12,394,830 B1
Rechargeable lithium battery and manufacturing method thereof
Yihan Shi, Guangdong (CN); Changjun Yang, Guangdong (CN); Pengfei Xiao, Guangdong (CN); and Zhaofu Zhou, Guangdong (CN)
Assigned to Hamedata Technology Co., Limited, Guangdong (CN)
Filed by Hamedata Technology Co., Limited, Guangdong (CN)
Filed on Mar. 7, 2025, as Appl. No. 19/073,190.
Application 19/073,190 is a continuation of application No. PCT/CN2025/070743, filed on Jan. 6, 2025.
Claims priority of application No. 202411686604.6 (CN), filed on Nov. 25, 2024.
Int. Cl. H01M 10/42 (2006.01); H01M 10/04 (2006.01); H01M 10/052 (2010.01); H01M 10/0587 (2010.01); H01M 50/107 (2021.01); H01M 50/119 (2021.01); H01M 50/202 (2021.01); H01M 50/224 (2021.01); H01M 50/233 (2021.01); H01M 50/287 (2021.01); H01M 50/293 (2021.01)
CPC H01M 10/425 (2013.01) [H01M 10/049 (2013.01); H01M 10/052 (2013.01); H01M 10/0587 (2013.01); H01M 50/107 (2021.01); H01M 50/119 (2021.01); H01M 50/202 (2021.01); H01M 50/224 (2021.01); H01M 50/233 (2021.01); H01M 50/287 (2021.01); H01M 50/293 (2021.01)] 9 Claims
OG exemplary drawing
 
1. A rechargeable lithium battery, comprising a voltage regulation circuit assembly, a plastic frame, a first metal housing, a lithium cell and an insulation sheath, wherein the voltage regulation circuit assembly and the plastic frame are disposed in the first metal housing, the plastic frame is configured for fixing the voltage regulation circuit assembly, the lithium cell comprises a winding cell assembly, a high-voltage positive electrode cap assembly and a second metal housing, an annular rolling groove is formed on an upper portion of the second metal housing, the winding cell assembly is disposed in the second metal housing and is positioned by the annular rolling groove, the second metal housing is divided by the annular rolling groove into a lower body portion and an upper contraction portion, an outer diameter of the first metal housing is the same as an outer diameter of the lower body portion of the second metal housing, an inner diameter of the first metal housing is the same as an outer diameter of the upper contraction portion of the second metal housing, the upper contraction portion of the second metal housing is embedded in the first metal housing, an outer surface of the first metal housing is aligned with an outer surface of the second metal housing, and the insulation sheath is coated on the first metal housing and the second metal housing;
wherein the voltage regulation circuit assembly comprises a low-voltage positive electrode cap, a printed circuit board (PCB), a charging interface, a high-voltage positive electrode elastic sheet, a negative electrode elastic sheet and an elastic ejector pin, the charging interface, the high-voltage positive electrode elastic sheet, the negative electrode elastic sheet and the elastic ejector pin are all disposed on the PCB, the plastic frame and the low-voltage positive electrode cap are limited by a top wall of the first metal housing, a positive and negative electrodes isolation sheet is further disposed between the low-voltage positive electrode cap and the top wall of the first metal housing, a through hole is formed on a top of the first metal housing, a first charging avoidance hole is formed on a side surface of the first metal housing, the low-voltage positive electrode cap extends out of the through hole, the first charging avoidance hole is configured to expose the charging interface of the voltage regulation circuit assembly, the elastic ejector pin abuts against an inner wall of the low-voltage positive electrode cap, the negative electrode elastic sheet abuts against an inner wall of the first metal housing, the high-voltage positive electrode elastic sheet abuts against the high-voltage positive electrode cap assembly, the first metal housing and the second metal housing are in contact and conductive, and a second charging avoidance hole is formed at a corresponding position on a side surface of the insulation sheath.