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Title:
CONTROL METHOD AND SYSTEM OF A FUEL CELL ELECTRIC VEHICLE STACK
Document Type and Number:
WIPO Patent Application WO/2021/038544
Kind Code:
A3
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.

Inventors:
SUN LEI (CN)
YU CHAO (CN)
CHEN YOUPENG (CN)
HU GANGYI (CN)
Application Number:
PCT/IB2020/059504
Publication Date:
April 22, 2021
Filing Date:
October 09, 2020
Export Citation:
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Assignee:
CERES IP CO LTD (GB)
WEICHAI POWER CO LTD (CN)
International Classes:
H01M8/04664; B60L3/00; B60L50/70; B60L58/30; H01M8/04537; H01M8/04746; H01M8/04955; H01M8/249
Domestic Patent References:
WO2006035287A22006-04-06
Foreign References:
US20050084726A12005-04-21
US20060127710A12006-06-15
US20150343903A12015-12-03
CN110315980A2019-10-11
Attorney, Agent or Firm:
WYNNE-JONES IP LIMITED (GB)
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