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Multi-stack fuel cell control method, control device, system and vehicle

A fuel cell and control method technology, applied in the fields of control devices, systems and vehicles, and multi-stack fuel cell control methods, can solve the problems affecting the safety and stability of multi-stack fuel cells, the influence of convergence speed, etc., so as to improve service time. , to meet the power consumption, the effect of prolonging the service life

Active Publication Date: 2021-07-27
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Aiming at the problem of fuel cell life, there is currently a consensus control algorithm used to control the life consistency of multi-stack fuel cells. The inventor found that, but the consistency control algorithm Both the feedback coefficient and the communication network matrix have an impact on the convergence speed, and it is necessary to optimize the key parameters of the algorithm offline, otherwise the online convergence speed of the consensus algorithm will not be able to reach the global optimum, and thus it will not be possible to extend the entire multi-stack fuel cell to the greatest extent. life, thus affecting the safety and stability of the entire multi-stack fuel cell

Method used

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  • Multi-stack fuel cell control method, control device, system and vehicle
  • Multi-stack fuel cell control method, control device, system and vehicle
  • Multi-stack fuel cell control method, control device, system and vehicle

Examples

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Effect test

Embodiment 1

[0037] Set the maximum output power of each fuel cell stack (P fcimax ), set the maximum output power of each fuel cell stack (P fcimin ), set the system bus voltage (V bus ). And explain the symbolic variables of the system as follows:

[0038] Define the power required by the system as Pload, the system power change at the next moment is ΔPload, and the actual output voltage and current of each fuel cell stack are V fci and I fci , the ideal output voltage of each stack is V fci_ideal , the ideal voltage is known, and the output power change of each fuel cell cascade converter is ΔP dci , the output power of each fuel cell is P dci .

[0039] combine figure 1 And multi-stack fuel cells are composed of 4 groups of fuel cell stacks (011, 012, 013, 014) connected in parallel as an example to describe the multi-stack fuel cell control method of this embodiment in detail, which specifically includes the following steps:

[0040] S101: During the start-up period of the mu...

Embodiment 2

[0059] refer to figure 2 , a multi-stack fuel cell control device of this embodiment, which includes:

[0060] The power equalizing module 11 is used for evenly distributing the currently required power to each fuel cell stack during the start-up period of the multiple stacks of fuel cells.

[0061] In a specific implementation, in the power variable distribution module 11, the aging degree of the electric stack is characterized by an attenuation factor, and the attenuation factor is the ratio of the actual output voltage of the electric stack to the ideal output voltage.

[0062] The power variable distribution module 12 is used to obtain the aging degree of the corresponding stack at the current moment according to the output voltage of each fuel cell stack during the running time period after the start-up of the multi-stack fuel cells, and then according to the aging degree and the next The power variable at the next moment is allocated to each fuel cell stack according t...

Embodiment 3

[0066] refer to image 3 , the present embodiment provides a multi-stack fuel cell control system, which includes an isolated electrical signal sampling circuit 002 , a performance and parameter calculation unit 003 and a strategy formulation control unit 004 .

[0067] In a specific implementation, the strategy formulation control unit 004 is configured to evenly distribute the currently required power to each fuel cell stack during the start-up period of the multiple fuel cell stacks.

[0068] The isolated electrical signal sampling circuit 002 is used to collect the output voltage of each fuel cell stack and transmit it to the performance and parameter calculation unit during the running period after the multi-stack fuel cells are started.

[0069] The electrical signal collected by the isolated electrical signal sampling circuit 002 is analyzed and counted for the operation of different electric stacks, mainly including high power operation, idling operation, variable load...

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Abstract

The invention belongs to the field of battery control, and provides a multi-stack fuel cell control method, a control device, a system and a vehicle. The control method comprises the following steps that in a starting time period of a multi-stack fuel cell, the currently required power is averagely distributed to each fuel cell stack; in an operation time period after the multi-stack fuel cell is started, the aging degree of the corresponding stack at the current moment is obtained according to the magnitude of the output voltage of each fuel cell stack, and then the power variable at the next moment is allocated to each fuel cell stack according to the aging degree and the variation of the required power at the next moment, so that, the aging degrees of the multiple stacks of fuel cells tend to be consistent.

Description

technical field [0001] The invention belongs to the field of battery control, and in particular relates to a multi-stack fuel cell control method, control device, system and vehicle. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] A hydrogen fuel cell is an energy conversion device that converts hydrogen energy into electrical energy through an electrochemical reaction. At present, fuel cells are used as the main power supply of rail transit vehicles, but they cannot meet the needs of high-power and long-distance vehicles. This is because on the one hand, the power and energy of the fuel cell itself is limited, and on the other hand, the life of the fuel cell is still not as long as that of transportation. Require. The multi-stack fuel cell is composed of several low-power fuel cell systems. On the premise of improving the power level an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/30
CPCB60L58/30Y02T90/40Y02E60/50
Inventor 李艳昆梁建英刘铭田庆李端凯
Owner CRRC QINGDAO SIFANG CO LTD
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