Power-on control protection system of fuel cell bus

A fuel cell system and fuel cell technology, applied in battery/fuel cell control devices, electrical transmission signal systems, electric vehicles, etc., can solve the problems of pre-charging circuits not working properly, vehicles not driving, and low fault tolerance rate, etc., to achieve Simple structure, no delay feedback, and the effect of improving the fault tolerance rate

Pending Publication Date: 2020-05-08
SHANGHAI SUNLONG BUS
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  • Claims
  • Application Information

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Problems solved by technology

However, the development of fuel cells is still in its infancy. The fault tolerance rate of the fuel cell system and the vehicle is not high at present, and it is very easy to cause gas leakage during the high-voltage power supply process, and non-dangerous failures will cause the...

Method used

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  • Power-on control protection system of fuel cell bus
  • Power-on control protection system of fuel cell bus
  • Power-on control protection system of fuel cell bus

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Embodiment

[0031] The invention relates to a power-on control and protection system of a fuel cell bus, which is used to avoid the problem that the whole vehicle cannot be driven and moved when the fuel cell system in the car fails, and to ensure that the high-voltage components of the whole vehicle and the fuel cell system cannot move when hydrogen gas leaks. Job security. Such as figure 1 As shown, the device includes a VCU (Vehicle control unit, vehicle control unit) 3, an FCU (Fuel-control unit, fuel cell control unit) 4, a pre-charging circuit 5, a high-voltage contactor 6, a hydrogen concentration sensor 7, and a display screen 8 and alarm9.

[0032] The hydrogen concentration sensor 7 is connected to the analog input terminal of the VCU3 through a hard wire, and is used to detect hydrogen leakage in the vehicle and prevent high voltage from being applied to the fuel cell system. The hydrogen concentration sensor 7 is provided with a hydrogen concentration probe. The hydrogen ga...

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PUM

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Abstract

The invention relates to a power-on control protection system of a fuel cell bus. The system comprises a VCU, an FCU, pre-charging loops, a high-voltage contactor, a hydrogen concentration sensor, a display screen and an alarm, wherein the pre-charging loops are connected with the analog quantity output end of the VCU; two pre-charging loops are provided; each group comprises two branches which are connected in parallel; the first branch in the first group comprises a fuel cell relay; the second branch in the first group comprises a pre-charging resistor and a fuel cell pre-charging relay connected with the pre-charging resistor in series; the first branch in the second group is a main positive relay; the second branch in the second group comprises a pre-charging resistor and an electric control pre-charging relay connected with the pre-charging resistor in series; and the pre-charging resistor is shared by the two pre-charging loops. Compared with the prior art, it is ensured throughpower-on protection that the fuel cell bus cannot be powered on by high voltage when hydrogen leaks, so that the driving safety is improved, meanwhile, a pure electric system can work normally, and the error-tolerant rate and the customer experience are improved.

Description

technical field [0001] The invention relates to the technical field of control of fuel cell buses, in particular to a power-on control and protection system for fuel cell buses. Background technique [0002] Fuel cell buses have become a hot spot for new energy buses. By using clean and renewable energy, they can realize the advantages of fast energy loading, high driving range, no pollution, and low cost. However, the development of fuel cells is still in its infancy. The fault tolerance rate of the fuel cell system and the vehicle is not high at present, and it is very easy to cause gas leakage during the high-voltage power supply process, and non-dangerous failures will cause the vehicle to fail. drive. The fuel cell system and the drive system in the bus are connected in parallel and share a pre-charging circuit, which is actually a series structure. When a battery system fails, the shared pre-charging circuit cannot work properly due to the series structure. Therefore...

Claims

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Application Information

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IPC IPC(8): B60L3/00B60L58/30G01N33/00G08B21/18G08B21/24G08B7/06
CPCB60L3/0053G01N33/005G08B7/06G08B21/18G08B21/24Y02T90/40
Inventor 嵇振亚张宇博李兆国
Owner SHANGHAI SUNLONG BUS
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