US 12,438,382 B2
Voltage balancing system
Ming Luo, Jiangsu (CN); Chuanjun Liu, Jiangsu (CN); and Xian Zhuang, Jiangsu (CN)
Assigned to Greenworks (Jiangsu) Co., Ltd, Changzhou (CN)
Filed by Greenworks (Jiangsu) Co., Ltd, Jiangsu (CN)
Filed on Nov. 21, 2023, as Appl. No. 18/515,300.
Application 18/515,300 is a continuation of application No. 17/128,164, filed on Dec. 20, 2020, granted, now 11,870,281.
Claims priority of application No. 201911404319.X (CN), filed on Dec. 31, 2019.
Prior Publication US 2024/0088678 A1, Mar. 14, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 7/00 (2006.01); H02J 1/10 (2006.01)
CPC H02J 7/0016 (2013.01) [H02J 1/106 (2020.01); H02J 7/0019 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A battery pack system comprising:
a first set of battery cells;
a second set of battery cells;
a control module, connected to said first set of battery cells and said second set of battery cells to obtain parameter information of the two sets of battery cells;
a balancing module, connected to said control module;
wherein said control module determines a difference between said first set of battery cells and said second set of battery cells based on said parameter information and generates a control instruction based on said difference, and said balancing module responds to said control instruction to balance said difference between said first set of battery cells and said second set of battery cells;
the battery pack system further comprises a high side analog front end, said high side analog front end configured on the side of said first set of battery cells to obtain said parameter information of said first set of battery cells and transmit said parameter information of said first set of battery cells to said control module;
the battery pack system further comprises a low side analog front end, said low side analog front end configured on the side of said second set of battery cells to obtain said parameter information of said second set of battery cells and transmit said parameter information of said second set of battery cells to said control module;
the balancing module comprises a first balancing circuit connected between the high-side analog front end and the control module and a second balancing circuit connected between the low-side analog front end and the control module;
wherein said first balancing circuit comprises a first balancing switch and a first balancing resistor connected to said first balancing switch, said first balancing switch receiving a first drive signal from said control module, and said second balancing circuit comprises a second balancing switch and a second balancing resistor connected to said second balancing switch, said second balancing switch receiving a second drive signal from said control module;
wherein the first balancing switch is also respectively connected to an output end of the control module and the high-side analog front end, and a switch signal of the first balancing switch is sent by the control module; and wherein the second balancing switch is also respectively connected to an output end of the control module and the low-side analog front end, and a switch signal of the second balancing switch is sent by the control module.