AC impedance testing system and method for electrochemical device
A technology of AC impedance and test system, applied in the direction of measuring resistance/reactance/impedance, measuring device, measuring electrical variables, etc., can solve the problems of high cost of AC impedance analysis equipment, low cost of test system, poor versatility, etc., to achieve universality The effect of strong, improved performance, and simple circuit structure
Active Publication Date: 2019-03-01
TSINGHUA UNIV
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[0010] In view of the high cost and poor versatility of the above-mentioned commercial AC impedance analysis equipment, the purpose of the present invention is to provide an AC impedance testing system and method for electrochemical devices, the above-mentioned testing system is low in cost and high in versatility
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[0058] In order to make the technical solution of the present invention more clear, the AC impedance testing system and method of the electrochemical device of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention and not to limit the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0059] Such as Figure 4 As shown, the AC impedance testing system of an electrochemical device 100 according to an embodiment of the present invention includes an electrochemical device 100, a control device, a DC regulation branch, a disturbance regulation branch connected in parallel with the DC regulation branch, and a first voltage detection device 500 and the first current detection devi...
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The invention provides an AC impedance test system for an electrochemical device, comprising an electrochemical device, a control device, a DC adjustment branch, and a disturbance adjustment branch connected in parallel with the DC adjustment branch. The electrochemical device is connected with the control device. The DC adjustment branch includes a first output load. The disturbance adjustment branch includes a current disturbance device used for producing disturbance current and a second output load. The control device is used for, after making the current disturbance device opened, adjusting the input current of the current disturbance device to a preset disturbance current, and calculating an AC impedance corresponding to the disturbance frequency of the preset disturbance current according to the output current and output voltage of a to-be-tested single chip of the electrochemical device. The invention further provides an AC impedance test method for an electrochemical device. According to the AC impedance test system and the AC impedance test method for an electrochemical device, the circuit structure is simple, the commonality is strong, and the performance of the test system is improved.
Description
technical field [0001] The invention relates to the technical field of electrochemical devices, in particular to an AC impedance testing system and method for electrochemical devices. Background technique [0002] Hydrogen-oxygen proton exchange membrane fuel cell (Proton Exchange Membrane Fuel Cell, referred to as PEMFC) is an electrochemical device that directly converts chemical energy into electrical energy. The energy conversion of traditional internal combustion engines is limited by the Carnot cycle, while hydrogen-oxygen proton exchange membrane fuel cells Energy conversion is not limited by the Carnot cycle, and theoretically its energy conversion efficiency is higher. Because the substances involved in the reaction are hydrogen and air, the reaction product is water, and no harmful emissions are produced, so it is favored by people and gradually used in backup power stations, transportation, and mobile power supplies. [0003] The output characteristic of the prot...
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IPC IPC(8): G01R27/08
CPCG01R27/08
Inventor 洪坡江宏亮李建秋徐梁飞欧阳明高
Owner TSINGHUA UNIV