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Fuel cell system and method of identifying power leakage area

A technology of fuel cell system and fuel cell stack, which is applied in the direction of fuel cell, fuel cell control, fuel cell additives, etc., and can solve the problems of indistinguishability

Active Publication Date: 2019-03-05
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the relays on both sides are turned on to check whether the fuel cell stack is a leakage area, even if the insulation resistance returns to a normal value, it is impossible to distinguish between the positive side relay and the backflow prevention diode as the leakage area or the fuel cell stack. The area is the leakage location

Method used

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  • Fuel cell system and method of identifying power leakage area
  • Fuel cell system and method of identifying power leakage area
  • Fuel cell system and method of identifying power leakage area

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Embodiment Construction

[0030] Embodiment 1 will be described. figure 1 A fuel cell system 100 is shown. The fuel cell system 100 is mounted on the fuel cell vehicle 1 . The fuel cell system 100 includes a fuel cell stack 10, an FDC 20, an FC relay circuit 30, an inverter 40, an air compressor MG1, a drive motor MG2, a secondary battery 50, a secondary battery relay circuit 60, and a secondary battery booster circuit 60. Converter 70 , control device 80 , capacitor C3 , and leakage detection unit 200 . FDC is a DC / DC converter.

[0031] The fuel cell stack 10 is formed by laminating a plurality of single cells, and generates electricity through an electrochemical reaction between hydrogen and air. Each unit cell is a power generation element that can generate electricity even when it is a single unit, and includes: a membrane electrode assembly as a power generator, in which electrodes are arranged on both sides of the electrolyte membrane; and separators, which are arranged on both sides of the mem...

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Abstract

Disclosed are a fuel cell system and a method of identifying a power leakage area. When reduction of insulation resistance is detected, an FC positive side relay is opened, and a switching element isturned OFF. When the insulation resistance has returned to a normal value as a result of the relay opening and the switching element turning OFF, it is identified that the power leakage is occurring in the area between the positive side relay and the diode.

Description

[0001] Cross References to Related Applications [0002] This application claims priority based on Japanese Patent Application No. 2017-163970 filed on August 29, 2017, the entire disclosure of which is incorporated herein by reference. technical field [0003] The present disclosure relates to inspection of electric leakage. Background technique [0004] Japanese Unexamined Patent Application Publication No. 2014-036467 discloses a method for specifying a leakage location in an electrical system including a power source and a load mounted in a hybrid vehicle. Specifically, a power control device with a power cutoff function provided on the power path from the power source to the load is made to perform a state transition between the power cutoff state and the power non-cutoff state, and the change in the output of the detection unit that occurs before and after the state transition The size to determine the location of the reduction in insulation resistance. [0005] Fuel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04298H01M8/04664
CPCH01M8/04298H01M8/04679H01M8/04686H01M2250/20H01M8/04228H01M8/04559H01M8/04619H01M8/04649Y02T90/40Y02E60/50
Inventor 斋藤拓鸟海启一
Owner TOYOTA JIDOSHA KK
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