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fuel cell vehicle

A fuel cell vehicle, fuel cell technology, applied in the direction of fuel cells, fuel cell applications, power system fuel cells, etc., can solve the problems of fuel cell output reduction, catalyst oxidation activity, fuel cell deterioration, etc., to prevent overcharging, avoid Deterioration, output drop high effect

Inactive Publication Date: 2017-04-12
SUZUKI MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In such a fuel cell vehicle, it is advantageous to supply power from the battery even when the load is high or when the load fluctuates, and to charge the battery with regenerative power from the motor when the vehicle decelerates. However, if the battery voltage is high, Then there is a problem that the catalyst is oxidized and the activity is lowered, and the output of the fuel cell is lowered. In addition, if the battery voltage changes, there is a problem that the catalyst continues to dissolve due to repeated oxidation and reduction, resulting in the deterioration of the fuel cell.

Method used

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Embodiment Construction

[0048] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0049] exist figure 1 Among them, in the fuel cell vehicle 10 according to the first embodiment of the present invention, the fuel cell 1 and the storage battery 3 are connected in parallel to the inverter 5 and the motor 6 via the DC-DC converters 2 and 4, and the fuel cell vehicle 10 includes : direct connection circuits 12, 14, the direct connection circuit 12 constitutes a bypass with respect to the DC-DC converter 2, and the direct connection circuit 14 constitutes a bypass with respect to the DC-DC converter 4; and switching components 11, 13, which are used for The above-mentioned direct connection circuits 12, 14 are cut off.

[0050] As the fuel cell 1, for example, a solid polymer fuel cell (PEFC) is preferably used. In the drawings, the fuel cell 1 is often simply described as FC. The storage battery 3 is preferably a lithium ion secondary batte...

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Abstract

There is provided a fuel cell vehicle, wherein high efficiencythe can be maintained corresponding to a change in driving conditions and at the same time deterioration of the fuel cell and a decrease in performance can be avoided. A fuel cell vehicle in which a fuel cell and a storage battery are connected to a driving inverter and a driving motor for travelling in parallel via a DC-DC converter comprises a fuel cell side direct connection circuit capable of bypassing the DC-DC converter in order that the fuel cell and the storage battery are directly connected with the driving inverter and the driving motor, and control means which control of the opening and closing of the DC-DC converter and the direct current circuits on both sides and which are configured to either of the fuel cell and the storage battery to be selectively and directly connected with the driving inverter and the driving motor via the direct connection circuits at both sides, wherein the other of the fuel cell and the storage battery controls, by means of constant current, the operating DC-DC converter to be connected or to stop operating.

Description

technical field [0001] The invention relates to a fuel cell vehicle, and in more detail, relates to a control system for an electric vehicle with a fuel cell and a storage battery. Background technique [0002] It is advantageous for a fuel cell vehicle to be equipped with a fuel cell and a storage battery at the same time in order to improve the utilization efficiency of electric power. For example, a fuel cell is directly connected to a drive inverter and a drive motor, and a diode is provided to prevent overvoltage from being applied to the fuel cell. On the other hand, a battery is connected to a drive inverter and a drive motor via a DC-DC converter ( Refer to Patent Documents 1 and 2). [0003] In such a fuel cell vehicle, it is advantageous to supply power from the battery even when the load is high or when the load fluctuates, and to charge the battery with regenerative power from the motor when the vehicle decelerates. However, if the battery voltage is high, Ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/18
CPCB60L50/72B60L58/40H01M8/04589H01M8/0491H01M2250/20H01M2250/402Y02B90/10Y02E60/50Y02T10/70Y02T90/40
Inventor 泽田直见
Owner SUZUKI MOTOR CORP