公开(公告)号：WO2021038544A2

公开(公告)日：2021-03-04

申请号：PCT/IB2020/059504

申请日：2020-10-09

Applicant: CERES INTELLECTUAL PROPERTY COMPANY LIMITED ,  WEICHAI POWER CO., LTD.

Inventor： SUN, Lei ,  YU, Chao ,  CHEN, Youpeng ,  HU, Gangyi

IPC: H01M8/04664 ,  H01M8/04537 ,  H01M8/04746 ,  H01M8/04955 ,  B60L58/30 ,  H01M8/249 ,  B60L3/00 ,  B60L50/70 ,  B60L3/0053 ,  H01M2250/20 ,  H01M8/04634 ,  H01M8/04649 ,  H01M8/04679 ,  H01M8/04753 ,  H01M8/04768 ,  E60

Abstract: A control method and system of a fuel cell electric vehicle stack. The control method comprises steps of: obtaining insulation resistance of the stack, which comprises at least two sub-stacks electrically connected in parallel; and disconnecting a sub-stack with insulation failure from a DC bus and then causing the stack to enter a failure mode when it is determined that the insulation resistance of the stack is smaller than a first preset threshold. The stack is determined to have an insulation failure when it is determined that the insulation resistance of the stack is smaller than a first preset threshold. The sub-stack that has the insulation failure is located and disconnected the sub-stack with insulation failure from a DC bus, and the stack is then caused to run in a failure mode to perform failure protection on the stack, avoid deterioration of the insulation failure and burnout of the stack and improve the safety performance of the stack.