TY - JOUR
T1 - Digital Battery Management Design for Point-of-Load Applications with Cell Balancing
AU - Yang, Yin Di
AU - Hu, Kai Yu
AU - Tsai, Chien Hung
N1 - Funding Information:
Manuscript received October 10, 2018; revised February 1, 2019, April 23, 2019, and July 7, 2019; accepted August 18, 2019. Date of publication September 12, 2019; date of current version March 31, 2020. This work was supported by the Ministry of Science and Technology, Taiwan, under Project MOST 107-2221-E-006-201 and Project MOST 108-2221-E-006-145-MY2. (Corresponding author: Yin-Di Yang.) Y.-D. Yang and C.-H. Tsai are with the Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan (e-mail:, indi1614@gmail.com; chtsai@ee.ncku.edu.tw).
Publisher Copyright:
© 2019 IEEE.
PY - 2020/8/1
Y1 - 2020/8/1
N2 - In portable devices, such as notebook computers and tablet personal computers, one or more battery strings with multiple lithium-ion (Li-ion) cells have been used since long. Life cycle and safety of the Li-ion battery strings are crucial aspects. A battery management system (BMS) is required for monitoring the status of each cell and balancing their state of charge (SoC). However, most conventional cell equalizers provide only cell monitoring and equalization functions. In this article, a parallel architecture is presented that not only achieves battery cell equalization but also is capable of providing voltage regulation for point-of-loads (POLs). In the proposed equalizer, several isolated dc-dc converters are constructed. The input terminal of each converter is connected to a battery cell, and the output terminals are connected to one point for the poststage POLs. A battery voltage acquirement system is built for SoC estimation. A central BMS controller is realized using a field-programmable gate array to receive sensed signals and control all the functions. The entire system is verified using the experimental results for a battery string involving three NCR 18650B Li-ion cells connected in series.
AB - In portable devices, such as notebook computers and tablet personal computers, one or more battery strings with multiple lithium-ion (Li-ion) cells have been used since long. Life cycle and safety of the Li-ion battery strings are crucial aspects. A battery management system (BMS) is required for monitoring the status of each cell and balancing their state of charge (SoC). However, most conventional cell equalizers provide only cell monitoring and equalization functions. In this article, a parallel architecture is presented that not only achieves battery cell equalization but also is capable of providing voltage regulation for point-of-loads (POLs). In the proposed equalizer, several isolated dc-dc converters are constructed. The input terminal of each converter is connected to a battery cell, and the output terminals are connected to one point for the poststage POLs. A battery voltage acquirement system is built for SoC estimation. A central BMS controller is realized using a field-programmable gate array to receive sensed signals and control all the functions. The entire system is verified using the experimental results for a battery string involving three NCR 18650B Li-ion cells connected in series.
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U2 - 10.1109/TIE.2019.2940001
DO - 10.1109/TIE.2019.2940001
M3 - Article
AN - SCOPUS:85083280175
SN - 0278-0046
VL - 67
SP - 6365
EP - 6375
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 8
M1 - 8835118
ER -