Control method and system of electric vehicle electric pile of fuel cell

Abstract

The invention provides a control method and system of an electric vehicle electric pile of a fuel cell. The control method comprises the following steps that 1, an insulation resistance of the electric pile is obtained, wherein the electric pile comprises at least two sub-electric piles which are connected in parallel; 2, when it is judged that the insulation resistance of the electric pile is smaller than a first preset threshold value, the electric pile enters a fault operation mode after disconnecting the connection between the sub-electric piles of the insulation failure and a direct-current bus. According to the technical scheme, when the insulation resistance of the electric pile is smaller than the first preset threshold value by judgment, an insulation failure fault occurring in the electric pile is determined, and the sub-electric piles are positioned which has an insulation failure fault, the connection between the insulation failure sub-electric piles and the direct-currentbus is disconnected, and the electric pile is enabled to operate in a fault operation mode, so that the fault of the electric pile can be prevented from deteriorating, the electric pile can be burnt out, and the safety performance of the electric pile can be improved.

Description

technical field [0001] The invention relates to the field of fuel cell electric vehicle stack control, in particular to a control method and system for a fuel cell electric vehicle stack. Background technique [0002] A fuel cell electric vehicle is a vehicle powered by the electric power generated by the electric stack of the on-board fuel cell. The key to fuel cell electric vehicles is the fuel cell stack. [0003] However, the existing fuel cell electric vehicles do not have the protection function of stack insulation failure, which will lead to deterioration of stack insulation failure and burn out the stack. At the same time, it is impossible to locate the sub-stack with insulation failure. The safety performance of the stack is low and the risk is relatively high. . Contents of the invention [0004] In view of this, the present invention provides a fuel cell electric vehicle stack control method and system, which can effectively solve the problems existing in the ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing fuel cell electric vehicles do not have the protection function of stack insulation failure, which will lead to deterioration of stack insulation failure and burn out the stack. At the same time, it is impossible to locate the sub-stack with insulation failure. The safety performance of the stack is low and the risk is relatively high.

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