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Control method and device for fuel cell system

The technology of a fuel cell system and control method, which is applied in the field of communication, can solve the problems of low efficiency in restoring battery stack performance, achieve the effects of improving performance and durability, and eliminating flooding

Active Publication Date: 2015-09-23
DONGFANG ELECTRIC (CHENGDU) HYDROGEN FUEL CELL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Embodiments of the present invention provide a control method and device for a fuel cell system, so as to at least solve the technical problem of inefficiency in restoring battery stack performance in the prior art

Method used

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  • Control method and device for fuel cell system
  • Control method and device for fuel cell system
  • Control method and device for fuel cell system

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Effect test

Embodiment approach 1

[0049] Such as Image 6 As shown, when the output power of the battery stack temporarily drops, the fuel cell system does not increase the gas flow of the reaction and maintains the operating state of the BOP, while the part of the external power demand that exceeds the output power of the battery stack is provided by the energy storage unit. At this time, the supply of the reaction gas of the battery stack is greater than the normal flow rate of the reaction gas required, which facilitates the discharge of liquid water inside the battery stack, so that the battery stack can return to the normal power output state. However, while the performance of the battery stack is recovering, the power provided by the energy storage unit is gradually reduced until the output power of the battery stack can just meet the external power demand during normal operation.

Embodiment approach 2

[0051] Such as Figure 7 As shown, when the output power of the battery stack temporarily drops, the fuel cell system does not increase the gas flow of the reaction, and maintains the operating state of the BOP. Preferably, the output power of the battery stack is further reduced to reduce the output burden of the battery stack. At this time, the part of the external power demand greater than the output power of the battery stack is provided by the energy storage unit. At this time, the supply of reaction gas to the battery stack is much greater than the normal required flow of reaction gas, which facilitates the rapid discharge of liquid water inside the battery stack, so that the battery stack can return to the normal power output state. However, while the performance of the battery stack is recovering, the power provided by the energy storage unit is gradually reduced until the output power of the battery stack can just meet the external power demand when the battery stack ...

Embodiment approach 3

[0055] When the output power of the battery stack temporarily drops, the fuel cell system does not increase the reactant gas flow and maintains the BOP operating state, while the power required by the BOP module is provided by the energy storage unit (that is, as Figure 8 d in), thus reducing the required power output of the battery stack. At this time, the supply of reaction gas to the battery stack is greater than the normal flow rate of reaction gas required, which facilitates the discharge of liquid water inside the battery stack and restores the battery stack to a normal state. While the performance of the battery stack is restored, the power demand of the BOP module is provided by the battery stack again (ie, if Figure 8 Shown in e), until the normal operation of the battery stack just meets the internal and external power requirements of the system.

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Abstract

The invention discloses a control method and device of a fuel cell system. The method comprises steps of: detecting output power of a cell stack of the fuel cell system; judging a local waterlogging condition of the cell stack according to the reduction of the cell stack output power and the plunging of the cell voltage; and in the case of confirming the occurrence of the waterlogging condition, providing part of power required by outside through an energy storage unit of the fuel cell system to reduce the power output of the cell stack, so as to eliminate the waterlogging and enable the performance of the cell stack to be resumed rapidly. According to the control method of the fuel cell system, without influencing the whole output power of the system, the technical problem that the output performance of the cell stack is temporarily reduced caused by local waterlogging is solved, and the technical effects of maintaining stable power output of the system, timely resuming the performance of the cell stack, and improving the performance and durability of the fuel cell stack are achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a control method and device for a fuel cell system. Background technique [0002] A fuel cell is an environmentally friendly, efficient, and long-life power generation device. The working principle of the fuel cell is explained below by taking the proton exchange membrane fuel cell (referred to as PEMFC) as an example: the fuel gas enters from the anode side, the hydrogen atoms in the fuel gas lose electrons at the anode side and become protons, and the protons pass through the proton exchange membrane Reaching the cathode, the electrons also reach the cathode via an external circuit at the same time. At the cathode protons and electrons combine with oxygen to form water, which generates electricity. From the above analysis, it can be seen that the fuel cell converts chemical energy into electrical energy in a non-combustion manner. Since the fuel cell is not limited by the C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04H01M8/04119H01M8/04298
CPCY02E60/50
Inventor 高建龙汤浩殷聪陶诗涌张伟明高玉练勇
Owner DONGFANG ELECTRIC (CHENGDU) HYDROGEN FUEL CELL TECH CO LTD
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