Online vehicle-mounted hydrogen fuel cell impedance spectrum measuring device and measuring method

A fuel cell and measuring device technology, which is applied to fuel cells, measuring devices, power system fuel cells, etc., can solve the problems of easy damage, large volume, and long measurement period, so as to improve accuracy, improve operating conditions, and improve reliability. sexual effect

CN112285587APending Publication Date: 2021-01-29TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-01-29

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Abstract

The invention relates to an online vehicle-mounted hydrogen fuel cell impedance spectrum measuring device and method, wherein the device comprises a controllable AC source which is used for applying asinusoidal alternating signal, a battery voltage signal preceding-stage measuring circuit communicated with one single battery through a voltage signal gating circuit, a current sensor, a battery current signal preceding-stage measuring circuit connected with the current sensor, and a signal conditioning and amplifying circuit, multiple independent synchronous analog-to-digital conversion circuits, a digital signal processor and an upper computer which are connected in sequence; the signal conditioning and amplifying circuit is connected to the battery voltage signal preceding-stage measuringcircuit and the battery current signal preceding-stage measuring circuit, and the upper computer is connected with a controllable alternating current source and a voltage signal gating circuit. Compared with the prior art, the fuel cell impedance spectrum measuring device has the advantages that the miniaturization of the fuel cell impedance spectrum measuring device is realized and the reliability of the fuel cell impedance spectrum measuring device is improved by designing the battery current signal preceding-stage measuring circuit and the voltage signal gating circuit and utilizing a semiconductor device.
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Description

technical field

[0001] The invention relates to the field of on-line measurement of hydrogen fuel cell impedance, in particular to an on-line vehicle-mounted hydrogen fuel cell impedance spectrum measurement device and measurement method. Background technique

[0002] With the energy crisis and environmental protection issues getting attention from all walks of life, clean energy and renewable energy technologies have been deeply researched and widely used. Among them, proton exchange membrane fuel cells are considered to have the potential to replace internal combustion engines and be widely used in future new energy vehicles due to their high energy density, high efficiency, and no pollutant emissions. However, there are still many problems restricting the widespread use of proton exchange membrane fuel cells in the automotive field, and the durability and life of fuel cells are one of the main aspects. Since the fuel cell system is a complex electrochemical system, the s...

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Embodiment Construction

[0038] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0039] An online vehicle-mounted hydrogen fuel cell 1 impedance spectrum measurement device, such as figure 1 shown, including:

[0040] A controllable AC source 2, connected to both ends of the fuel cell 1, for applying a sinusoidal alternating signal, such as a current controllable DC-DC converter;

[0041] The battery voltage signal pre-stage measurement circuit 6 is connected to both ends of each single cell of the fuel cell 1 through the voltage signal gating circuit 7, and the voltage signal gating circuit 7 selects one to connect to a single cell;

[0042] A current sensor 4 ...