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Power management method for multi-stack hydrogen fuel cell system

A technology of a fuel cell system and a management method, which is applied in the field of power management of a multi-stack hydrogen fuel cell system, can solve problems such as increasing control complexity, and achieve the effects of simple and effective power distribution strategy, improved reliability, and improved battery durability

Active Publication Date: 2021-11-05
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the multi-stack fuel cell system also increases the complexity of control while improving the durability and reliability of the fuel cell.

Method used

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  • Power management method for multi-stack hydrogen fuel cell system
  • Power management method for multi-stack hydrogen fuel cell system
  • Power management method for multi-stack hydrogen fuel cell system

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Embodiment Construction

[0027] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0028] A power management method for a multi-stack hydrogen fuel cell system of the present application is used in the power supply system of an electric vehicle: it includes a multi-stack hydrogen fuel cell system and a power battery, and the two cooperate to provide power for the electric vehicle. The multi-stack fuel cell system is formed by connecting multiple fuel cell stacks. The connection mode of multiple fuel cell stacks includes series connection, parallel connection or mixed connection; the power battery can use lithium titanate battery; the state of charge (SOC) of the power battery The estimation method can adopt the open circuit voltage method. Such as Figure 4 As shown, in the multi-stack hydrogen fuel cell system of the present application, n fuel cell stacks 1 (fuel cell stack 1, fuel cell stack 2...fuel cell stack n in the figure...

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Abstract

The invention relates to a power management method for a multi-stack hydrogen fuel cell system. The power management method comprises the following steps: acquiring real-time information about the speed, acceleration and accelerator pedal of a vehicle; calculating the real-time power demand Pd of the vehicle; acquiring real-time state information of the multi-stack fuel cell system and a power cell; and according to the power demand Pd and the real-time state information, determining the number of opened fuel cell stacks in the multi-stack hydrogen fuel cell system at each moment through a lag control strategy, and then determining which fuel cell stacks are the ones to open according to the accumulated operation time of each fuel cell stack and the principle of uniform distribution of working time, thereby realizing power flow distribution of the power cell and the multi-stack hydrogen fuel cell system. According to the power management method, the effective working time of each fuel cell stack is shortened, start-stop frequency is reduced, and the service life of the system is prolonged; and the aging degrees of all the fuel cell stacks are close, and maintenance is convenient.

Description

technical field [0001] The invention relates to the technical field of electric vehicle battery system power management, in particular to a method for power management of a multi-stack hydrogen fuel cell system. Background technique [0002] The traditional single-stack fuel cell power generation system has the disadvantages of poor durability, high cost and poor reliability, which seriously restricts the popularization and use of the current fuel cell power generation system. At present, the multi-stack fuel cell system has become the first choice to solve this problem. However, the multi-stack fuel cell system increases the complexity of control while improving the durability and reliability of the fuel cell. In response to this, researchers at home and abroad have carried out a lot of theoretical and experimental discussions. How to better distribute the power flow between multiple fuel cell stacks and power cells and prolong the life of fuel cells has become a technical...

Claims

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Application Information

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IPC IPC(8): B60L58/30B60L58/31H01M8/04955H01M8/04858H01M8/04537
CPCB60L58/30B60L58/31H01M8/04955H01M8/0494H01M8/04626B60L2240/12B60L2240/14Y02T90/40Y02E60/50
Inventor 庄伟超牛俊严殷国栋
Owner SOUTHEAST UNIV