Voltage monitoring and diagnosing device and method of fuel cell stack

Abstract

The invention relates to a voltage monitoring device of a fuel cell stack, comprising a connector assembly, a measuring wiring harness and a voltage measuring unit of the fuel cell stack, wherein theconnector assembly is used for a 121-stitching machine; one end of the measuring wiring harness is respectively connected with an even number of polar plates or a three multiple number of polar plates, and the other end is connected with the voltage measuring unit of the fuel cell stack through the connector assembly used for the 121-stitching machine; and the voltage measuring unit of the fuel cell stack detects the voltage information of each measuring point, which is transmitted by the connector assembly used for the 121-stitching machine, and compares the average voltage of the fuel cell stack with the voltage information of the measuring point to determine whether the voltage of a cell positioned at the measuring point is normal. The voltage monitoring device realizes the voltage monitoring and diagnosing of a fuel cell used for a vehicle and has the advantages of low realization cost, simple structure, safety, reliability, and the like.

Description

technical field [0001] The invention belongs to the field of fuel cells, in particular to a voltage monitoring device for a vehicle-mounted fuel cell. Background technique [0002] Currently, fuel cell vehicles monitor the operating status of the fuel cell stack, usually by monitoring the voltage of each cell of the fuel cell stack. [0003] In the prior art, the monitoring of the fuel cell stack operating state of a fuel cell vehicle has the following disadvantages: [0004] 1) A general fuel cell stack consists of hundreds of single cells connected in series, and the method of one-by-one inspection requires a lot of voltage measurement lines, which not only increases material and production costs, but also reduces the reliability of the entire system due to too many measurement lines; [0005] 2) At present, multi-channel D-type connectors and cables are usually used to connect between the fuel cell stack voltage inspection and the fuel cell stack voltage measurement unit...

AI Technical Summary

Problems solved by technology

[0004] 1) A general fuel cell stack consists of hundreds of single cells connected in series, and the method of one-by-one inspection requires a lot of voltage measurement lines, which not only increases material and production costs, but also reduces the reliability of the entire system due to too many measurement lines;

[0005] 2) At present, multi-channel D-type connectors and cables are usually used to connect between the fuel cell stack voltage inspection and the fuel cell stack voltage measurement unit. It is difficult for the connectors of this scheme to meet the requirements of shock resistance, waterproof and dustproof

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