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Shutdown control method of a fuel cell hybrid power system

A hybrid power system and fuel cell technology, applied in the field of power supply, can solve the problems of not considering the influence of different discharge capacities of auxiliary components, failure to start the power system, affecting the performance of the battery, etc., to achieve simple design, improve service life, Avoid the effects of complex calculations

Active Publication Date: 2021-05-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The next time the battery is turned on, the battery needs to supply power to the entire system until the fuel cell is started. These processes will inevitably consume the energy of the battery, so that the SOC of the battery is no longer in the expected range, affecting the performance of the battery, and even causing the power system to fail to start.
In addition, these methods do not consider the different power consumption of auxiliary components during the start-stop process of the fuel cell under different environmental conditions and the impact of the environment on the discharge capacity of the battery.

Method used

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  • Shutdown control method of a fuel cell hybrid power system
  • Shutdown control method of a fuel cell hybrid power system
  • Shutdown control method of a fuel cell hybrid power system

Examples

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Embodiment

[0041] figure 1 is the schematic block diagram of the fuel cell hybrid power system;

[0042] In this example, if figure 1 As shown, the fuel cell hybrid power system includes a vehicle controller, a fuel cell, a fuel cell auxiliary component (BOP), a fuel cell controller, a power battery, a battery controller, a motor, and a motor controller. The vehicle controller, fuel cell controller, battery controller and motor controller are connected to each other through the CAN bus.

[0043]Among them, the fuel cell is connected to the DC bus through a unidirectional DC / DC converter, the auxiliary components of the fuel cell are connected to the DC bus through a unidirectional DC / DC converter, and the power storage battery is connected to the DC bus through a bidirectional DC / DC converter. After the system receives the shutdown command, the fuel cell can still charge the battery through the unidirectional DC / DC converter, and the battery can still provide power for purging to the a...

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Abstract

The invention discloses a shutdown control method of a fuel cell hybrid power system. Fuzzy logic is used to determine the fuel cell purge time, and then the purge energy consumption of auxiliary components within the purge time is calculated, so as to formulate different power consumption according to the current SOC of the storage battery. Specifically, when the current SOC of the battery is higher than the expected upper limit, the auxiliary components of the fuel cell are used to consume excess power; range to meet fuel cell purging requirements.

Description

technical field [0001] The invention belongs to the technical field of power supplies, and more specifically relates to a shutdown control method of a fuel cell hybrid power system. Background technique [0002] With the increasingly severe energy crisis and environmental pollution, governments all over the world are paying more and more attention to the development of renewable, low-pollution and efficient new energy sources. Among them, fuel cells are favored by people for their high power density, high energy efficiency, and zero pollution emissions, and are widely considered to be the ultimate solution for future automotive power. Due to the soft output characteristics and slow dynamic response of the pure fuel cell system, an external power source is required to provide purging power for auxiliary components during the start and stop process. Therefore, it usually forms a hybrid system with a battery. [0003] In the power system, the battery not only responds to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/30
CPCB60L2210/10Y02T90/40
Inventor 李凯张学强邹见效郑宏徐红兵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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