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Fuel battery efficiency optimization method for electric-electric hybrid power system

A fuel cell and hybrid power technology, applied in battery/fuel cell control devices, battery/battery traction, electric vehicles, etc., can solve problems such as energy consumption, affecting fuel cell energy efficiency, unreasonable design, etc. efficiency, ensure efficient and stable operation, and achieve the effect of energy recovery

Active Publication Date: 2020-02-07
FUZHOU UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

Second, as a power conversion device, the DC / DC converter will also cause a large amount of energy consumption due to its own structure
At the same time, the unreasonable design of the operating point of the fuel cell will also affect the energy efficiency of the fuel cell

Method used

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  • Fuel battery efficiency optimization method for electric-electric hybrid power system
  • Fuel battery efficiency optimization method for electric-electric hybrid power system
  • Fuel battery efficiency optimization method for electric-electric hybrid power system

Examples

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] Please refer to figure 1 , the present invention provides an electric-electric hybrid power supply system, which adopts fuel cells and variable structure storage batteries as power sources, and connects the fuel cells and variable structure storage batteries directly to the bus bar in parallel and connects them to the load motor through a DC / AC inverter; its efficiency The optimization method includes the following steps:

[0044] In this example, if figure 2 Shown is the structure diagram of the variable structure battery power supply, in which the series-parallel grouping inside the battery power supply can be realized by closing the corresponding switch, for example: closing the switches Spu1, Spu2, Sdu1, Sdu2 can realize the parallel connection of battery cell 1 and cell 2; Close the switches Ss1, Ss3, Spu2, Spd2, Spd4 to realize parallel...

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Abstract

The invention relates to a fuel battery efficiency optimization method for an electric-electric hybrid power system and provides the electric-electric hybrid power system; a fuel battery and a variable-structure storage battery are used as a power supply and are directly connected in parallel in a bus bar and are connected with a load motor by virtue of a direct-current / alternating-current inverter; the fuel battery efficiency optimization method comprises the following steps of: step (S1) acquiring relevant parameters of each working point of a fuel battery power supply by virtue of off-linemeasurement and calculation, and acquiring a function relationship of the voltage, current, power and efficiency of the fuel battery power supply; step (S2) acquiring the voltage and power of a maximum efficiency point of the fuel battery power supply by virtue of function inverse operation; step (S3) matching serial-parallel grouped structures of the variable-structure storage battery power supply; and step (S4) calculating the amount of monomers which are to be connected in series with the variable-structure storage battery power supply and the amount of branches which are to be connected inparallel with the variable-structure storage battery power supply. The fuel battery efficiency optimization method provided by the invention can effectively increase the utilization rate of the fuelbattery by stabilizing the fuel battery to work at the maximum efficiency point.

Description

technical field [0001] The invention relates to a fuel cell hybrid power supply, in particular to a fuel cell efficiency optimization method for an electric-electric hybrid power supply system. Background technique [0002] A fuel cell is an energy conversion device that directly converts chemical energy into electrical energy. The electrical energy is generated mainly through chemical reactions. The reaction process is not limited by the Carlo cycle, so it has higher power than traditional internal combustion engines. The energy conversion efficiency is high, and the noise of the fuel cell in the power generation process is small and basically pollution-free. Compared with batteries, fuel cells generally use shallow charging and shallow discharging in order to ensure the durability of batteries and avoid overcharging and overdischarging during the energy supply process. The effective capacity is small and the energy density is low. Fuel supply needs to be met, and under no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L50/51B60L50/75B60L58/40
CPCB60L50/51B60L50/75B60L58/40Y02T90/40Y02T10/70
Inventor 王亚雄张晨阳陈铨
Owner FUZHOU UNIV
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