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Fuel cell system, and electric vehicle equipped with the fuel cell system

A fuel cell system, fuel cell technology, applied in the direction of fuel cells, fuel cell additives, battery/fuel cell control devices, etc., can solve problems such as deterioration and overcharging of secondary batteries

Inactive Publication Date: 2012-03-14
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, depending on the state of charge of the secondary battery, there is a possibility that the secondary battery is overcharged and thus deteriorates

Method used

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  • Fuel cell system, and electric vehicle equipped with the fuel cell system
  • Fuel cell system, and electric vehicle equipped with the fuel cell system
  • Fuel cell system, and electric vehicle equipped with the fuel cell system

Examples

Experimental program
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Embodiment Construction

[0026] as in figure 1 As shown in , a fuel cell system 100 installed in an electric vehicle 200 includes a chargeable and dischargeable secondary battery 12, a step-up / step-down voltage converter 13 that raises or lowers the voltage of the secondary battery 12, The DC power of the step-down / step-down voltage converter 13 is converted into AC power and supplies power to the inverter 14 and the fuel cell 11 of the traction motor 15 .

[0027] The secondary battery 12 is constructed of a chargeable and dischargeable lithium ion storage battery or the like. The voltage of the secondary battery 12 is lower than the driving voltage of the traction motor 15 in this embodiment. However, the voltage of the secondary battery is not so limited, but may also be a voltage equal to or higher than the driving voltage of the traction motor. The step-up / step-down voltage converter 13 has a plurality of switching elements, and steps up the low voltage supplied from the secondary battery 12 to...

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PUM

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Abstract

A fuel cell system starts a fuel cell by setting the voltage supplied to a secondary cell from a voltage transformer at an open-circuit voltage of the fuel cell, and raising the voltage of the fuel cell from a starting voltage to the open-circuit voltage, in the case where the secondary cell is expected to be overcharged if the secondary cell receives electric power. In the case where the secondary cell is not expected to be overcharged if the secondary cell receives electric power, the system starts the fuel cell by setting the voltage supplied from the voltage transformer at a high-potential-avoiding voltage that is lower than the open-circuit voltage of the fuel cell at or after the elapse of a predetermined time following the output of a command to close an FC relay, and raising the voltage of the fuel cell from the starting voltage to the high-potential-avoiding voltage.

Description

technical field [0001] The present invention relates to a fuel cell system and a control performed on an electric vehicle equipped with the fuel cell system when the electric vehicle is started. Background technique [0002] Now consider the practical application of a fuel cell that supplies hydrogen as a fuel gas to a fuel electrode and air as an oxidant gas to an oxidizer electrode, and by generating water on the oxidizer electrode while generating water between hydrogen and oxygen in the air The electrochemical reaction produces electricity. [0003] In such a fuel cell, if at the beginning of operation, the pressure of hydrogen supplied to the fuel electrode and the pressure of air supplied to the oxidizer electrode are approximately equal to the respective pressures occurring during normal operation, hydrogen and air, respectively, sometimes occur The gas is non-uniformly distributed in the fuel electrode and the oxidant electrode, and the electrodes are degraded by el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M16/00B60L11/18H01M8/04
CPCB60L58/31B60L58/40H01M8/04567H01M16/006Y02E60/10Y02E60/50Y02T10/70Y02T90/40
Inventor 吉田道雄今井敦志小川朋也
Owner TOYOTA JIDOSHA KK