Online diagnosis method and equipment for leakage of fuel cell polar plate, and storage medium

The invention relates to the field of fuel cell leakage detection, in particular to an online diagnosis method and equipment for leakage of a fuel cell polar plate and a storage medium. The diagnostic method comprises the steps of: operating the fuel cell; identifying whether a single battery with abnormal performance exists in the operation process or not; respectively carrying out high-frequency and low-frequency impedance tests on the single battery with abnormal performance and the single battery with normal performance; and comparing high-frequency and low-frequency impedance values between the single battery with abnormal performance and the single battery with normal performance, and judging whether the polar plate leaks liquid or not. Compared with the prior art, the method has the advantage of being capable of accurately measuring the liquid leakage of the single battery pole plate of the fuel battery on line. 本发明涉及燃料电池漏液检测领域，尤其是燃料电池极板漏液的在线诊断方法、设备及存储介质。所述诊断方法包括以下步骤：运行燃料电池；识别运行过程中是否存在性能非正常的单电池；对性能非正常单