公开(公告)号：US11187758B2

公开(公告)日：2021-11-30

申请号：US16340135

申请日：2017-10-19

申请人： San Diego State University Research Foundation

发明人： Chunting Mi ,  Fei Lu ,  Bing Xia ,  Yunlong Shang

IPC分类号： G01R31/396 ,  G01R31/44 ,  G01R31/3835 ,  G01R31/371 ,  B60L58/22 ,  B60L3/00 ,  H02J7/00 ,  G01R31/36

摘要： The present disclosure is directed to method of automatic circuit fault detection. The method includes inputting a common periodic wave voltage to each of a plurality of battery cells of a battery pack. Recursively calculated correlation coefficients for each neighboring pair of the battery cells are used to determine whether a common battery cell of two neighboring pairs is faulty. The disclosure further describes equalizers for multi-cell battery packs and series-connected battery strings. The equalizers can include a coupling capacitor comprising a plurality of small plates coupled between the two series-connected metal-oxide-semiconductor field-effect transistors (MOSFETs) connected to each battery cell, and a larger plate, wherein the larger plate is commonly coupled to all of the small plates. A plurality of battery string groups can be equalized, where each cell includes one transformer winding and a MOSFET. The MOSFETs are driven using one pair of complementary pulse width modulation signals.

公开(公告)号：US20190310321A1

公开(公告)日：2019-10-10

申请号：US16340135

申请日：2017-10-19

申请人： San Diego State University Research Foundation

发明人： Chunting Mi ,  Fei Lu ,  Bing Xia ,  Yunlong Shang

IPC分类号： G01R31/396 ,  G01R31/371 ,  G01R31/3835 ,  H02J7/00 ,  B60L3/00 ,  B60L58/22

摘要： The present disclosure is directed to method of automatic circuit fault detection. The method includes inputting a common periodic wave voltage to each of a plurality of battery cells of a battery pack. Recursively calculated correlation coefficients for each neighboring pair of the battery cells are used to determine whether a common battery cell of two neighboring pairs is faulty. The disclosure further describes equalizers for multi-cell battery packs and series-connected battery strings. The equalizers can include a coupling capacitor comprising a plurality of small plates coupled between the two series-connected metal-oxide-semiconductor field-effect transistors (MOSFETs) connected to each battery cell, and a larger plate, wherein the larger plate is commonly coupled to all of the small plates. A plurality of battery string groups can be equalized, where each cell includes one transformer winding and a MOSFET. The MOSFETs are driven using one pair of complementary pulse width modulation signals.