US 12,191,460 B2
Asymmetric battery pack with varied electrode and current collector properties to achieve C-Rate balancing
Loren L. Roy, Los Gatos, CA (US); Qingzhi Guo, Campbell, CA (US); Premanand Ramadass, San Mateo, CA (US); Hyungook Yoon, Santa Clara, CA (US); and Jinjun Shi, San Jose, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on May 13, 2022, as Appl. No. 17/744,002.
Application 17/744,002 is a division of application No. 16/739,457, filed on Jan. 10, 2020, granted, now 11,489,211.
Claims priority of provisional application 62/864,085, filed on Jun. 20, 2019.
Prior Publication US 2022/0399576 A1, Dec. 15, 2022
Int. Cl. H01M 10/44 (2006.01); H01M 4/70 (2006.01); H01M 10/04 (2006.01); H01M 10/0587 (2010.01); H01M 10/42 (2006.01); H01M 50/103 (2021.01); H01M 50/112 (2021.01); H01M 50/538 (2021.01); H01M 50/534 (2021.01)
CPC H01M 10/441 (2013.01) [H01M 4/70 (2013.01); H01M 10/0431 (2013.01); H01M 10/0587 (2013.01); H01M 10/4207 (2013.01); H01M 50/103 (2021.01); H01M 50/112 (2021.01); H01M 50/538 (2021.01); H01M 2010/4292 (2013.01); H01M 50/534 (2021.01)] 10 Claims
OG exemplary drawing
 
1. A method for balancing a C-rate of an asymmetric battery pack, the method comprising:
packaging a first jelly roll battery cell and a second jelly roll battery cell into the asymmetric battery pack, first jelly roll battery cell comprising a first battery design and the second jelly roll battery cell comprising a second battery design, wherein the second battery design is different than the first battery design;
balancing a C-rate of the second jelly roll battery cell with a C-rate of the first jelly roll battery cell by increasing a thickness of a current collector of a cathode layer of the second jelly roll battery cell to reduce an impedance of the second jelly roll battery cell; and
connecting the first jelly roll battery cell and the second jelly roll battery cell in parallel.