US 11,984,558 B2
Button-type lithium ion battery and method for fabricating same
Wei Chen, Guangdong (CN); and Xuehua Huang, Guangdong (CN)
Assigned to ZHONGSHAN ZHONGWANGDE NEW ENERGY TECHNOLOGY CO., LTD, Zhongshan (CN)
Filed by ZHONGSHAN ZHONGWANGDE NEW ENERGY TECHNOLOGY CO., LTD, Guangdong (CN)
Filed on Jun. 20, 2020, as Appl. No. 16/907,178.
Application 16/907,178 is a continuation of application No. PCT/CN2020/087693, filed on Apr. 29, 2020.
Claims priority of application No. 201911094423.3 (CN), filed on Nov. 11, 2019.
Prior Publication US 2021/0143484 A1, May 13, 2021
Int. Cl. H01M 10/0587 (2010.01); H01M 10/0525 (2010.01); H01M 50/109 (2021.01)
CPC H01M 10/0587 (2013.01) [H01M 10/0525 (2013.01); H01M 50/109 (2021.01)] 6 Claims
OG exemplary drawing
 
1. A method for fabricating a button-type lithium ion battery, comprising the following steps:
fabricating a winding core provided with a round hole at center, a center uptight which is a hollow tube having a fully enclosed side wall, an end of the side wall forming an opening, a pole and a shell internally provided with a cavity;
inserting the center uptight into the round hole;
leading out a positive tab and a negative tab from the winding core;
welding the positive tab on the shell through laser welding or ultrasonic welding;
welding the negative tab on the pole through laser welding or ultrasonic welding or resistance welding;
placing the winding core in the cavity of the shell;
embedding the pole and a part of the negative tab into the opening of the center upright; and
sealing the cavity of the shell;
wherein the shell comprises a pedestal and a cover body mutually cooperated to form the cavity;
the pole is arranged on the cover body; and
a liquid injection port and a through hole used for installing the pole are formed on the cover body by punching;
wherein the pole and the part of the negative tab enter an interior of the center uptight only through the opening; the center upright is made of insulating material selected from a group consisting of plastic and rubber; and the pole is made of copper;
wherein the pedestal is shaped by stretching, and forms the cavity configured for accommodating the winding core.
 
2. The method for fabricating the button-type lithium ion battery according to claim 1, wherein the pole is embedded into the through hole, and sealant is injected between an outer wall surface of the pole and an inner wall surface of the through hole.
 
3. The method for fabricating the button-type lithium ion battery according to claim 1, wherein the button-type lithium ion battery further comprises an upper insulating sheet and a lower insulating sheet attached to an upper bottom surface and a lower bottom surface of the winding core, respectively.
 
4. The method for fabricating the button-type lithium ion battery according to claim 1, wherein the cover body is provided with a seal; the seal is capable of sealing the liquid injection port.
 
5. The method for fabricating the button-type lithium ion battery according to claim 1, wherein a material of the shell is aluminum.