High-voltage power-off strategy for fuel cell vehicle

A fuel cell and fuel cell system technology, applied in electric vehicle charging technology, electric vehicles, battery/fuel cell control devices, etc., can solve the problem of not being able to meet the requirements of hydrogen energy vehicles, and achieve the effect of ensuring service life

Pending Publication Date: 2019-10-25
WUHAN GROVE HYDROGEN AUTOMOBILE CO LTD
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AI Technical Summary

Problems solved by technology

[0003] However, the power-off strategy for new energy vehicles in the prior art: by detecting that the bus current of the power battery is lower than a certain value

Method used

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  • High-voltage power-off strategy for fuel cell vehicle

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] see Figure 1-2 , the present invention provides a technical solution: a high-voltage power-off strategy for fuel cell vehicles,

[0020] Principle 1: While performing their respective functions, each ECU communicates through the twisted-pair shielded layer CAN network, which can well shield the interference of external EMC and ensure the stability and reliability of communication.

[0021] Principle 2: By identifying the hard-wire signal of the start ...

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Abstract

The invention discloses a high-voltage power-off strategy for a fuel cell vehicle, relates to the technical field of fuel cell vehicles, and specifically discloses a high-voltage power-off strategy for the fuel cell vehicle. The system comprises a vehicle control unit (VCU), an auxiliary energy source 1, an auxiliary energy source 2, a bidirectional DC, a starting switch, a low-voltage distribution box, a high-voltage power distribution unit (PDU), an electric drive unit (EDU), a hydrogen fuel system (FCU+HTMS) and a 12V storage battery; transmission and receiving of information are carried out through a CAN bus among ECUs, and the peculiarity of a control strategy is caused by a unique hydrogen fuel cell system of a hydrogen fuel cell vehicle. The high-voltage power-off strategy has the beneficial effects that a corresponding power-off flow is designed according to the electrical characteristic of the hydrogen fuel cell system is guaranteed, the stability and reliability of high-voltage power-off are guaranteed, the practicability, applicability and safety of the hydrogen fuel cell vehicle are improved, and the using requirement of people is met effectively.

Description

technical field [0001] The invention relates to the technical field of fuel cell vehicles, in particular to a high-voltage power-off strategy for fuel cell vehicles. Background technique [0002] With the continuous aggravation of environmental pollution, the more and more serious problem of air pollution in our country urgently needs to be controlled and solved. In this source of air pollution, heavy truck exhaust emissions occupy a large share, followed by the promotion of new energy vehicles, new The high-voltage power-off control strategy of energy vehicles is an important application field of vehicle control. With the rapid development of new energy vehicles, the high-voltage power-off strategy of new energy vehicles is basically perfect; but with the rise of hydrogen fuel vehicles, the original strategy Not applicable to the fuel cell stack system, the design of a new high-voltage power-off control strategy will inevitably become a trend, and the high-voltage power-off...

Claims

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Application Information

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IPC IPC(8): B60L58/30
CPCB60L58/30Y02T90/16Y02T90/40
Inventor 程飞熊洁余红霞安元元郝义国
Owner WUHAN GROVE HYDROGEN AUTOMOBILE CO LTD
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