Multi-stack fuel cell cascade power generation system for distributed energy supply

A fuel cell and power generation system technology, applied in the direction of fuel cells, battery circuit devices, electrochemical generators, etc., can solve the problems of high cost, complex configuration design structure and control, poor reliability, etc., and achieve simple control and simplified structure and control method, the effect of improving reliability

Pending Publication Date: 2021-11-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the configuration design structure and control of the multi-stack fuel cell power generation system in the prior art are complex, costly, and poor in reliability.

Method used

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  • Multi-stack fuel cell cascade power generation system for distributed energy supply
  • Multi-stack fuel cell cascade power generation system for distributed energy supply
  • Multi-stack fuel cell cascade power generation system for distributed energy supply

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Embodiment Construction

[0021] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0022] The multi-stack fuel cell cascaded power generation system for distributed energy supply in this embodiment, such as figure 1 As shown, it includes a multi-stack fuel cell subsystem 5, and its structure is as follows: it includes n fuel cell stacks 1, each fuel cell stack 1 is cascaded with a first MOS tube 2 and a second MOS tube 3, and the fuel cell stack 1 The negative pole of the fuel cell stack 1 is connected to the D pole of the first MOS transistor 2, the positive pole of the fuel cell stack 1 is connected to the anode of the power diode 4, and the cathode of the power diode 4 is connected to the D pole of the second MOS transistor 3; after the fuel cell stack 1 and the power diode 4 are connected in series connected in parallel with the filter capacitor 10; the second MOS transistor 3 is connected to the first MOS transistor 2 through...

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Abstract

The invention relates to a multi-stack fuel cell cascade power generation system for distributed energy supply. The system comprises a multi-stack fuel cell subsystem, the multi-stack fuel cell subsystem structurally comprises n fuel cell stacks, each fuel cell stack is in cascade connection with a first MOS tube and a second MOS tube, the D pole of the second MOS tube of the nth fuel cell stack is connected with the S pole of the second MOS tube of the (n-1) th fuel cell stack; the D pole of the second MOS tube of the first fuel cell stack is connected with a load current input end, and the S pole of the second MOS tube of the nth fuel cell stack is connected with a load current output end; n is greater than or equal to 2. The number of the fuel cell stacks providing electric energy can be adjusted according to the dynamic load, so that the efficiency and the service life of the fuel cell system are improved; fault cell stacks can be isolated, and reliability of the power generation system is improved.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a multi-stack fuel cell cascaded power generation system for distributed energy supply. Background technique [0002] Some areas of our country are facing the dilemma of insufficient power grid transmission capacity, or even no power grid. The use of fuel cell power generation system for power supply is the key method to solve this problem. [0003] The traditional single-stack fuel cell power generation system has the disadvantages of low efficiency, poor durability, high cost and poor reliability, which seriously restricts the popularization and use of the current fuel cell power generation system. The fundamental reason is that the single-stack fuel cell power generation system is over-designed, its output power is often lower than its rated power, and it needs to run all the time. In addition, the single-stack fuel cell power generation system has only one fuel cell stack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04955H02J7/34
CPCH01M8/04955H02J7/34Y02E60/50
Inventor 庄伟超牛俊严殷国栋
Owner SOUTHEAST UNIV
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