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Hydrogen injector for fuel cell system

A fuel cell system and injector technology, applied in fuel cells, fuel cell additives, electrochemical generators, etc., can solve problems such as power waste and consumption, and achieve the effect of suppressing power consumption

Pending Publication Date: 2021-01-19
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the current of the first current value (> the second current value) is continuously supplied after the solenoid valve is opened, power is wastefully consumed

Method used

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  • Hydrogen injector for fuel cell system
  • Hydrogen injector for fuel cell system
  • Hydrogen injector for fuel cell system

Examples

Experimental program
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Embodiment Construction

[0014] A hydrogen injector 10 according to an embodiment will be described with reference to the drawings. figure 1 A block diagram showing the fuel cell system 2 including the hydrogen injector 10 . The fuel cell system 2 includes a fuel cell stack 3 , a hydrogen tank 4 , a main controller 5 , and a hydrogen injector 10 .

[0015] As is well known, the fuel cell system 2 obtains electric power through the reaction of oxygen and hydrogen. Oxygen and hydrogen react in the fuel cell stack 3 to obtain electric power.

[0016] Oxygen is obtained from air. An air duct 21 and a fuel duct 31 are connected to the fuel cell stack 3 . Oxygen (air) is introduced into the air duct 21 by the air compressor 22 . The air duct 21 has a first air valve 23 (pressure regulating valve), and the amount of air supplied to the fuel cell stack 3 is adjusted by the first air valve 23 . A second air valve 24 (pressure regulating valve) is provided on the outlet side of the fuel cell stack 3 of the...

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PUM

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Abstract

A hydrogen injector disclosed herein may include a solenoid valve connected to a hydrogen tank and a controller configured to supply a current to a coil of the solenoid valve. The controller may monitor a rate of change of the current while supplying the current equal to or greater than a first current value. The controller may decrease the current to a second current value which is lower than thefirst current value upon when the rate of change increases.

Description

technical field [0001] The technology disclosed in this specification relates to a hydrogen injector for a fuel cell system. More particularly, it relates to a hydrogen injector with reduced power consumption. Background technique [0002] In a fuel cell system, a hydrogen injector is used (for example, JP-A-2008-140619). The hydrogen injector decompresses the high-pressure hydrogen in the hydrogen tank and supplies it to the fuel cell stack. [0003] The main body of the hydrogen injector is a solenoid valve. A solenoid valve has a coil that moves a plunger (spool) that opens and closes a flow path. The solenoid valve opens when a current equal to or greater than a predetermined current value (first current value) is supplied to the coil, and closes the solenoid valve when the supply of current is cut off. Solenoid valves require high current to open, but not as high current to stay open. Therefore, the controller of the solenoid valve opens the solenoid valve by suppl...

Claims

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Application Information

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IPC IPC(8): H01M8/04082H01M8/04089H01M8/04537H01M8/04858F16K31/06
CPCH01M8/04201H01M8/04089H01M8/04597H01M8/04917F16K31/0675H01M8/04895H01M8/2484Y02E60/50H01M8/04753
Inventor 山口雅宪
Owner TOYOTA JIDOSHA KK
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