Hydrogen energy automobile fuel cell quick discharging method and system

Abstract

The invention relates to a hydrogen energy automobile fuel cell quick discharging method and system. The method comprises the following steps that a VCU (Vehicle Control Unit) monitors the state of anFCU (Electric Control Unit) in real time, judges that a vehicle is in a normal mode if the FCU operates normally, and judges that the vehicle is in a fault mode if the VCU receives a fault alarm sentby the FCU; in the normal mode, the FCU monitors the state of a fuel cell system in real time, and if the FCU detects that the fuel cell system stops running, the FCU controls the fuel cell system todischarge quickly according to a discharge strategy of the normal mode; and in the fault mode, if the FCU detects that a highest-level fault occurs or a DCDC (direct-current conversion controller) shutdown fault occurs, the FCU controls the fuel cell system to discharge quickly according to a discharge strategy of the fault mode. The DCDC and a thermistor work together to realize rapid dischargeof a fuel cell; the energy utilization rate is increased; the open-circuit voltage is reduced more quickly; and generated heat is reduced.

Description

technical field

[0001] The invention relates to the field of fuel cell discharge, in particular to a method and system for rapid discharge of a hydrogen-energy vehicle fuel cell. Background technique

[0002] With the support of national and local governments for fuel cells, fuel cell vehicles have developed rapidly, and more and more fuel cell vehicles have begun to enter the market. The fuel cell system is the heart of the fuel cell vehicle and plays a decisive role in the performance of the fuel cell vehicle.

[0003] The traditional fuel cell system has a high open circuit voltage after each operation. Whether it is shut down or enters the idle state, it is very slow. It takes a lot of time to wait for the passive discharge of the fuel cell system, and some will add a heater. Sensitive resistance to consume, the discharge efficiency of this method is not high, and there is a situation of generating heat. The continuous research of random technology, how to let the fuel...

Examples

Embodiment Construction

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0045] Please refer to figure 1 , which is a method flow chart of the present invention, a method for rapid discharge of a fuel cell of a hydrogen energy vehicle proposed by the present invention, comprising the following steps:

[0046] S1. The vehicle control unit VCU monitors the state of the electronic control unit FCU in real time. If the FCU is operating normally, it is determined that the vehicle is in the normal mode and enters step S2. If the VCU receives a fault alarm from the FCU, it is determined that the vehicle is in failure mode and enter step S4;

[0047] S2. The FCU monitors the status of the fuel cell system in real time; if the FCU detects that the fuel cell system stops running, enter step S3, other...

technical field

[0001] The invention relates to the field of fuel cell discharge, in particular to a method and system for rapid discharge of a hydrogen-energy vehicle fuel cell. Background technique

[0002] With the support of national and local governments for fuel cells, fuel cell vehicles have developed rapidly, and more and more fuel cell vehicles have begun to enter the market. The fuel cell system is the heart of the fuel cell vehicle and plays a decisive role in the performance of the fuel cell vehicle.

[0003] The traditional fuel cell system has a high open circuit voltage after each operation. Whether it is shut down or enters the idle state, it is very slow. It takes a lot of time to wait for the passive discharge of the fuel cell system, and some will add a heater. Sensitive resistance to consume, the discharge efficiency of this method is not high, and there is a situation of generating heat. The continuous research of random technology, how to let the fuel...

Examples

Embodiment Construction

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0045] Please refer to figure 1 , which is a method flow chart of the present invention, a method for rapid discharge of a fuel cell of a hydrogen energy vehicle proposed by the present invention, comprising the following steps:

[0046] S1. The vehicle control unit VCU monitors the state of the electronic control unit FCU in real time. If the FCU is operating normally, it is determined that the vehicle is in the normal mode and enters step S2. If the VCU receives a fault alarm from the FCU, it is determined that the vehicle is in failure mode and enter step S4;

[0047] S2. The FCU monitors the status of the fuel cell system in real time; if the FCU detects that the fuel cell system stops running, enter step S3, other...

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