公开(公告)号：US20210320312A1

公开(公告)日：2021-10-14

申请号：US17224705

申请日：2021-04-07

申请人： Tsinghua University

发明人： Pucheng PEI ,  Bozheng WANG ,  Dongfang CHEN ,  Shangwei HUANG ,  Peng REN

IPC分类号： H01M8/04992 ,  H01M8/04858

摘要： Provided are method and device for predicting service life and remaining life of a fuel cell. The method includes: activating the fuel cell, obtaining an initial polarization curve of the fuel cell, and selecting a first point having a first current in the initial polarization curve; determining a life end point of the fuel cell according to the initial polarization curve and a decay ratio; obtaining a current polarization curve, and determining a second point having a second current and a same voltage as the first point in the current polarization curve; and determining the service life of the fuel cell according to the first current, the second current, a current relationship between two polarization curves and a service life algorithm of the fuel cell, and obtaining the remaining life of the fuel cell according to the service life and a time of the current polarization curve.

公开(公告)号：US20220244319A1

公开(公告)日：2022-08-04

申请号：US17227379

申请日：2021-04-12

申请人： TSINGHUA UNIVERSITY

发明人： Pucheng PEI ,  Peng REN ,  Dongfang CHEN

IPC分类号： G01R31/396 ,  H01M8/1004 ,  H01M8/04746 ,  H01M8/04701 ,  H01M8/04537 ,  H01M8/04828 ,  G01R31/382

摘要： Provided is a method for simultaneous detection of parameters of membrane electrode assemblies of a fuel cell stack, which includes: supplying hydrogen to an anode of the fuel cell stack and inert gas to a cathode of the fuel cell stack, controlling operating conditions of the fuel cell stack at respective preset values; applying different voltage excitations or micro-current excitations to the fuel cell stack, collecting a current signal of an entire stack and a voltage signal of each fuel cell; and analyzing a hydrogen crossover current, a catalyst electrochemical surface area, a double-layer capacitance, and a short-circuit resistance of a membrane electrode assembly of each fuel cell based on an excitation-response formula of a fuel cell. The present disclosure does not limit a form of a current or voltage excitation, thereby improving accuracy of a parameter test of a membrane electrode assembly while reducing the test cost.

公开(公告)号：US20190229355A1

公开(公告)日：2019-07-25

申请号：US16244311

申请日：2019-01-10

申请人： Tsinghua University

发明人： Pucheng PEI ,  Peng REN ,  Yuehua LI ,  Ziyao WU ,  Dongfang CHEN ,  Shangwei HUANG ,  Xiaoning JIA

IPC分类号： H01M8/04089 ,  H01M8/0267 ,  H01M8/0258 ,  H01M8/0432 ,  H01M8/0438 ,  H01M8/04537 ,  H01M8/22

摘要： Provided are a method and an apparatus controlling a water flooding failure in a fuel cell dual-stack system. The method includes: acquiring a hydrogen pressure drop reference value of the stack system in each normal working condition to obtain a control value; collecting a current pressure drop at a hydrogen side, and determining whether the current pressure drop at the hydrogen side is higher than the control value corresponding to a current normal working condition; determining a faulted stack according to voltages or currents of the first stack and the second stack if the current pressure drop at the hydrogen side is higher than the control value corresponding to the current normal working condition; reducing an opening degree of a flow regulating valve of the faulted stack, and increasing an opening degree of a flow regulating valve of the other stack.

公开(公告)号：US20150219728A1

公开(公告)日：2015-08-06

申请号：US14685621

申请日：2015-04-14

申请人： Tsinghua University

发明人： Pucheng PEI ,  Huachi XU ,  Hongshan ZHA

IPC分类号： G01R31/36

CPC分类号： G01R31/396 ,  G01R31/3648 ,  G01R31/385 ,  H01M8/04552 ,  H01M8/04574

摘要： A method and a device for measuring various parameters of a membrane electrode assembly (MEA) in a fuel cell. Hydrogen gas and nitrogen gas or air are supplied to the fuel cell to be tested. A voltage of the fuel cell is diminished by connecting to a load until the voltage is zero. The fuel cell is charged at a constant current. A constant current value is measured by a current sensor. A current signal and a voltage signal are collected by a data collector and are converted into digital quantity signals which are transmitted to a data processing unit. Data are automatically processed by programming of the data processing unit. Parameters, including an electrochemical active surface area of a catalyst, a double-layer capacitance, a hydrogen crossover current, and an impedance of the MEA of the fuel cell are acquired by differentiation and integral operations of the voltage data.

摘要翻译： 一种用于测量燃料电池中的膜电极组件（MEA）的各种参数的方法和装置。 将氢气和氮气或空气供给到要测试的燃料电池。 燃料电池的电压通过连接到负载直到电压为零来减小。 燃料电池以恒定电流充电。 恒定电流值由电流传感器测量。 电流信号和电压信号由数据采集器收集并被转换成数字量信号，数字量信号被发送到数据处理单元。 通过数据处理单元的编程来自动处理数据。 通过电压数据的微分和积分运算，获得包括催化剂的电化学活性表面积，双层电容，氢交换电流和燃料电池的MEA的阻抗的参数。