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Power-off control method based on full-power electricity-electricity hybrid fuel cell automobile

A fuel cell and electrical control technology, applied in electric vehicles, electrical devices, vehicle components, etc., can solve the problem of lack of fuel cell life and safety considerations, inapplicability, and failure to fully consider the consumption of residual power for stack discharge protection problems, etc.

Active Publication Date: 2021-10-01
DONGFENG MOTOR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The entire de-energization process of the above-mentioned prior art revolves around the power battery, lacks consideration of the life and safety of the fuel cell, cannot guarantee that the high voltage of the vehicle will not be switched before the shutdown of the fuel system is completed, and does not fully consider the discharge protection of the battery stack and the battery. Consumption of residual power in the stack
This is not applicable to full-power electric-electric hybrid fuel cell vehicles with fuel cells as the main and power batteries as the auxiliary

Method used

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  • Power-off control method based on full-power electricity-electricity hybrid fuel cell automobile
  • Power-off control method based on full-power electricity-electricity hybrid fuel cell automobile
  • Power-off control method based on full-power electricity-electricity hybrid fuel cell automobile

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Embodiment 1

[0054] Such as Figure 1~3 As shown, the full-power electric-electric hybrid fuel cell vehicle designed in this embodiment includes a vehicle controller VCU 1, a fuel-electricity system FCS 2, a hydrogen storage system HMS 3, a power battery system 4, a drive motor 5, and a vehicle multi-combination system. A controller 6, defrosting and defogging PTC (electric defrosting) 7, electric air conditioner ACS 8, 12V low-voltage battery 10 (vehicle low-voltage system).

[0055] The fuel-electric system FCS 2 includes fuel cell controller FCCU 2.1, boost DCDC 2.2, FCS air compressor 2.3, FCS water pump 2.4, FCS hydrogen pump 2.5, FCS PTC 2.6, FCS fan 2.7, temperature control valve, back pressure valve, sensor Wait.

[0056] The vehicle's all-in-one controller 6 integrates 12V DCDC 6.1, 24V DCDC 6.2, drive motor controller MCU 6.3, high-voltage power distribution module, pre-charging circuit, relay (see KM3, KM5, KM6, KM8~10 in the figure), etc. .

[0057] The power battery system ...

Embodiment 2

[0066] Based on the full-power electric-electric hybrid fuel cell vehicle provided in Embodiment 1, this embodiment provides a power-off control method based on the full-power electric-electric hybrid fuel cell vehicle. The power-off control method includes a normal shutdown power-off process, a safety fault power-off process, and a normal fault power-off process, which will be described in detail below.

[0067] Such as Figure 4 As shown, the normal shutdown and power-off process includes the following steps:

[0068] S1: The normal power-off command of the vehicle is judged by the driver's driving intention. The vehicle controller VCU 1 recognizes whether the vehicle is powered off by receiving the keyless system PEPS signal and the gear position signal. When the driver presses the start button to enter the off gear, start the process of shutting down the fuel system (steps S3-S7) and the process of powering off the vehicle system (power battery system 4, drive motor 5, hi...

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Abstract

The invention discloses a power-off control method based on a full-power electricity-electricity hybrid fuel cell vehicle. The power-off control method comprises a normal shutdown power-off process, a safety fault power-off process and a self-fault emergency power-off process. The normal shutdown power-off process comprises the following steps that S1, a normal power-off instruction of the whole vehicle is identified; S2, whether an FCS shutdown instruction is issued or not is judged according to the SOC of the power battery; S3, a fuel cell system begins to reduce the load to idle speed power; S4, the fuel cell system is shut down for purging; S5, a step-up DCDC is safely discharged, and a machine is shut down after the residual electric quantity of the fuel cell is completely consumed; S6, discharging is conducted again through a bleeder resistor; S7, whether shutdown of the fuel cell system is completed or not is judged; S8, a hydrogen bottle valve is closed, and high-voltage discharge power-off is executed; and S9, low-voltage power-off is executed. According to the method, power-off is divided into three modes, power-off logic under different scene working conditions is realized, and the situation that the service life of the fuel cell system is affected due to the fact that the fuel cell system is damaged due to unreasonable logic is avoided.

Description

technical field [0001] The invention relates to a full-power fuel cell vehicle, in particular to a power-off control method based on a full-power electric-electric hybrid fuel cell vehicle. Background technique [0002] The high-voltage power-on control strategy of new energy vehicles is an important application field of vehicle control. With the rapid development of new energy vehicles, the high-voltage power-on strategy of new energy vehicles is basically perfect; but with the rise of hydrogen fuel vehicles, the original The strategy is not suitable for full-power fuel cell vehicles, and the relay control becomes more complicated due to the addition of an energy source. If it is impossible to consider the power-on and power-on sequence and reasonable jump logic of each system of the vehicle based on the working characteristics of the fuel-electric system and power system in a full-power fuel cell vehicle, it will lead to frequent start-up of the fuel-electric system and po...

Claims

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Application Information

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IPC IPC(8): B60L3/00B60L3/04
CPCB60L3/00B60L3/0053B60L3/04
Inventor 熊洁熊成勇王明锐马义尚伟华
Owner DONGFENG MOTOR GRP
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