公开(公告)号：US11695138B2

公开(公告)日：2023-07-04

申请号：US17454327

申请日：2021-11-10

申请人： Tongji University

发明人： Tiancai Ma ,  Jiajun Kang ,  Weikang Lin ,  Zhaoli Zhang ,  Kaihang Song

IPC分类号： H01M8/04537 ,  G01R31/3842 ,  G01R31/389 ,  G01R31/378 ,  H01M8/04791

CPC分类号： H01M8/04641 ,  H01M8/04552 ,  H01M8/04582 ,  G01R31/378 ,  G01R31/389 ,  G01R31/3842 ,  H01M8/0482 ,  H01M8/04559 ,  H01M8/04589 ,  H01M8/04649 ,  H01M2250/20

摘要： An online impedance spectrum measuring device and method for a vehicle-mounted hydrogen fuel cell includes: a controllable alternating current source, configured to apply a sinusoidal alternating signal; a cell voltage signal preceding-stage measuring circuit, configured to select to communicate with one monocell via a voltage signal gating circuit; a current sensor and a cell current signal preceding-stage measuring circuit connected with the current sensor; and a signal conditioning and amplifying circuit, a multi-channel simultaneous sampling analog-digital conversion circuit, a digital signal processor and an upper computer, which are connected in sequence, wherein the signal conditioning and amplifying circuit is connected to the cell voltage signal preceding-stage measuring circuit and the cell current signal preceding-stage measuring circuit, separately; and the upper computer is connected with the controllable alternating source and the voltage signal gating circuit.

公开(公告)号：US20220155377A1

公开(公告)日：2022-05-19

申请号：US17519577

申请日：2021-11-05

申请人： TONGJI UNIVERSITY

发明人： Tiancai Ma ,  Yanbo Yang ,  Kaihang Song ,  Weikang Lin ,  Naiyuan Yao

IPC分类号： G01R31/389 ,  H02J3/00 ,  H02J3/38 ,  G01R31/367 ,  G01R31/385

摘要： The present invention relates to a method for measuring the AC impedance of a battery in a composite power supply power system, comprising the following steps: determining the AC disturbance signal amplitude, operating the DC/DC voltage converter to generate the AC disturbance signal, collecting the output signals of the fuel cell and the lithium battery, calculating the output power of the fuel cell and the lithium battery; calculating the demand power of the load, and when the demand power is stable, calculating the impedance of the lithium battery and the fuel cell separately, otherwise, only the impedance of the fuel cell is calculated.

公开(公告)号：US12119754B1

公开(公告)日：2024-10-15

申请号：US18677237

申请日：2024-05-29

申请人： Tongji University

发明人： Tiancai Ma ,  Qilin Liu ,  Daohai Jiao ,  Weikang Lin ,  Kaihang Song

IPC分类号： H02M3/335 ,  H02M1/32 ,  H02M1/36

CPC分类号： H02M3/33584 ,  H02M1/32 ,  H02M1/36 ,  H02M3/33573

摘要： Isolated direct DC/DC converter topology structure for fuel cell system includes: Boost converter topology structure and bidirectional full-bridge converter topology structure connected in sequence. Input of the Boost converter topology structure is connected to fuel cell, and output of the Boost converter topology structure is connected to other key components of the fuel cell system and input of the bidirectional full-bridge converter topology structure. Output of the bidirectional full-bridge converter topology structure is connected to power cell. Usage of the Boost converter topology structure and usage of the bidirectional full-bridge converter topology structure change under different operating states of the fuel cell system. Based on insulation performance and high efficiency of the fuel cell system, the usage of the Boost converter topology structure and the usage of the bidirectional full-bridge converter topology structure change. Low efficiency caused by DC/DC converter with single isolated topology structure is effectively overcome.

公开(公告)号：US11971457B2

公开(公告)日：2024-04-30

申请号：US17519577

申请日：2021-11-05

申请人： TONGJI UNIVERSITY

发明人： Tiancai Ma ,  Yanbo Yang ,  Kaihang Song ,  Weikang Lin ,  Naiyuan Yao

IPC分类号： G01R31/389 ,  G01R31/367 ,  G01R31/385 ,  H02J3/00 ,  H02J3/38

CPC分类号： G01R31/389 ,  G01R31/367 ,  G01R31/385 ,  H02J3/003 ,  H02J3/38 ,  H02J2300/30

摘要： The present invention relates to a method for measuring the AC impedance of a battery in a composite power supply power system, comprising the following steps: determining the AC disturbance signal amplitude, operating the DC/DC voltage converter to generate the AC disturbance signal, collecting the output signals of the fuel cell and the lithium battery, calculating the output power of the fuel cell and the lithium battery; calculating the demand power of the load, and when the demand power is stable, calculating the impedance of the lithium battery and the fuel cell separately, otherwise, only the impedance of the fuel cell is calculated.