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Electric vehicle power system based on multi-stack fuel cells

A fuel cell system and electric vehicle technology, applied in electric vehicles, battery/fuel cell control devices, battery/battery traction, etc., can solve the problems of high cost and high DCDC requirements

Pending Publication Date: 2021-09-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the electric vehicle power system based on multi-stack fuel cells mostly adopts a parallel design, which has high requirements for DCDC and high cost

Method used

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  • Electric vehicle power system based on multi-stack fuel cells
  • Electric vehicle power system based on multi-stack fuel cells
  • Electric vehicle power system based on multi-stack fuel cells

Examples

Experimental program
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Embodiment approach

[0041]In this embodiment, the size, shape, rated power and number of fuel cell stacks 1 in the multi-stack fuel cell system 5 are determined according to actual load requirements and application scenarios. The power design methods of the fuel cell stack include: power equal distribution, Daisy chain distribution and power optimization distribution. The power battery pack 7 is connected in parallel with the multi-stack fuel cell subsystems 5 through wires, and the type, size, shape and rated capacity of the power battery pack 7 are determined according to the actual application scenario. The power design methods of the power battery pack 7 include: allocation based on rules, allocation based on optimization and allocation based on learning. As an implementation manner, the power battery pack 7 may choose to use a lithium titanate battery pack.

[0042] In this embodiment, the control module 6 can adopt STM32F103 high-speed embedded single-chip microcomputer.

[0043] The mult...

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Abstract

The invention relates to an electric vehicle power system based on multi-stack fuel cells. The electric vehicle power system comprises a plurality of fuel cell stacks. The fuel cell stacks are sequentially connected in series through a one-way DC / DC converter to form a multi-stack fuel cell system; the multi-stack fuel cell system is connected in parallel with the power battery pack and then connected in series with the motor through the DC / AC converter; the system further comprises a control module which is connected with the multi-stack fuel cell system and the power battery pack through control wires, and the control module is used for controlling the output power of the corresponding fuel cell stacks through the one-way DC / DC converter. Compared with the existing parallel structure, the multi-stack fuel cell system has the advantages that the bus voltage can be distributed among different fuel cell stacks, the requirement on the one-way DC / DC converter is low, and the cost is low.

Description

technical field [0001] The invention relates to the field of electric vehicle power systems, in particular to an electric vehicle power system based on multi-stack fuel cells. Background technique [0002] The problems of "high battery cost", "low hydrogen utilization rate" and "poor battery durability" widely exist in existing fuel cell electric vehicles, which seriously restrict the popularization and use of current fuel cell electric vehicles. The root cause is that the traditional single-stack fuel cell power system is over-designed, its output power is often lower than its rated power, most operating points are far away from the peak point of hydrogen utilization, and it needs to run all the time. In addition, the single-stack fuel cell power system has only one fuel cell with a large volume, which is difficult to arrange on a limited vehicle chassis, and once the fuel cell fails, it is difficult to maintain the normal operation of the entire power system only by the po...

Claims

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Application Information

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IPC IPC(8): B60L58/40B60L50/75B60L58/33
CPCB60L58/40B60L50/75B60L58/33Y02T10/70Y02T10/72Y02T90/40
Inventor 殷国栋牛俊严庄伟超徐利伟
Owner SOUTHEAST UNIV
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