Hydrogen fuel cell vehicle and fuel cell purging system thereof
A fuel cell and vehicle technology, which is applied to fuel cells, circuits, electrical components, etc., can solve problems such as voltage instability, battery over-discharge, and purging system supply voltage, and achieve the effect of improving stability.
Active Publication Date: 2019-04-12
ZHENGZHOU YUTONG BUS CO LTD
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Problems solved by technology
However, using the battery will cause over-discharge of the battery, which cannot meet the power supply requirements of other low-voltage electrical equipment on the vehicle; and when the fuel cell is used for power supply, the DC / DC conversion module cannot provide power due to the unstable voltage generated by the fuel cell. The purge system provides a stable voltage, which will cause poor power supply stability of the purge system
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[0034] The invention provides a hydrogen fuel cell vehicle and a fuel cell purging system thereof, which are used for improving the stability of purging during fuel cell shutdown.
[0035] To achieve the above object, the technical solution provided by the invention is:
[0036] A hydrogen fuel cell purging system, including a hydrogen fuel cell, a power battery and a storage battery, the hydrogen fuel cell is provided with electrical accessories; it also includes a DC / DC converter and a low-voltage direct current bus; the high-voltage side of the DC / DC converter The power battery is connected, and the low-voltage side is connected to the low-voltage DC bus; the battery and the power accessories are connected to the low-voltage DC bus; a switch is provided on the line connecting the power accessories to the low-voltage DC bus;
[0037] When the fuel cell is shut down, the switch is closed, and the power battery supplies power to the electrical accessories through the DC / DC con...
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The invention provides a hydrogen fuel cell vehicle and a fuel cell purging system thereof. The hydrogen fuel cell purging system comprises a hydrogen fuel cell, a power battery, a storage battery, aDC / DC converter and a low-voltage direct-current bus; the hydrogen fuel cell is provided with an electric accessory; the high-voltage side of the DC / DC converter is connected with the power battery, while the low-voltage side is connected with the low-voltage direct-current bus; the storage battery and the electric accessory are connected with the low-voltage direct-current bus; a switch is arranged on a circuit, which is connected with the low-voltage direct-current bus, of the electric accessory; the switch is closed in the shutdown process of the fuel cell, and the power battery supplies power for the electric accessory through the DC / DC converter and the storage battery; and when it is detected that the DC / DC converter works abnormally, the switch is controlled to be disconnected, andthe power supplying for the electric accessory is stopped. The DC / DC converter and the storage battery are both adopted for supplying power for the electric accessory, so that when the DC / DC converterworks unstably, the storage battery can supply power for the electric accessory, thereby improving the shutdown purging stability of the fuel cell.
Description
technical field [0001] The invention belongs to the technical field of fuel cell vehicle control, and in particular relates to a hydrogen fuel cell vehicle and a fuel cell purging system thereof. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of fuel into electrical energy. It can continuously output electrical energy only by feeding fuel and oxidant. It has the advantages of high energy conversion efficiency, clean and environmentally friendly, and no need for charging. Due to its long driving range and short hydrogenation time, fuel cell vehicles have become an important direction for the development of new energy vehicles, especially hydrogen-fueled proton exchange membrane fuel cells, which can start quickly at room temperature due to their low operating temperature , has become the most ideal power source and backup power source for vehicles. [0003] For hydrogen fuel cell vehicles, due to the special characteristics o...
Claims
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Login to View More IPC IPC(8): H01M8/06H02H3/087
CPCH02H3/087
Inventor 张永瑞李振山王永秋张永强孙盼龙
Owner ZHENGZHOU YUTONG BUS CO LTD