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Series-parallel connection switching system of fuel cell array, and operation method thereof

A fuel cell and switching system technology, which is applied in the direction of parallel conversion of batteries, arrangement of multiple synchronous batteries, secondary batteries, etc., can solve the problems that the battery stack cannot be guaranteed to operate in a good working area and is difficult to meet

Pending Publication Date: 2022-02-18
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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Problems solved by technology

Multiple stacks of fuel cells are connected in series and parallel to form a fuel cell array power generation system, which can effectively increase the power output capacity of fuel cells, but the fixed series and parallel connection method is difficult to meet various working conditions of power generation and electrolysis, and cannot guarantee that the stacks can be used under various working conditions. run in good working range

Method used

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  • Series-parallel connection switching system of fuel cell array, and operation method thereof
  • Series-parallel connection switching system of fuel cell array, and operation method thereof
  • Series-parallel connection switching system of fuel cell array, and operation method thereof

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Embodiment

[0037] Embodiment: A series-parallel switching system of a fuel cell array in this embodiment, such as figure 1 , figure 2As shown, the fuel cell array 1 is composed of multiple electric stacks 2, the series-parallel switching system includes a series-parallel switching module 3, a bidirectional DC / DC converter 4, and a control unit 5, and the series-parallel switching module 3 includes a positive DC copper bar bus 7 , negative DC copper bar busbar 8, total output terminal 9, and a plurality of connecting terminals 10 arranged in a row. The positive pole and negative pole of each connection terminal 10 are electrically connected to the positive DC copper bar bus 7 through the unique corresponding electronic switch A, and the negative pole of each connection terminal 10 is connected to the negative DC bus bar 7 through the unique corresponding electronic switch B. The copper busbar 8 is electrically connected, and the adjacent terminals 10 are connected in series through the ...

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Abstract

The invention discloses a series-parallel connection switching system of a fuel cell array, and an operation method thereof. The system comprises a series-parallel connection switching module, a bidirectional DC / DC converter and a control unit, each electric pile is electrically connected with a corresponding wiring terminal on the series-parallel connection switching module, the total output end of the series-parallel connection switching module is electrically connected with the low-voltage side of the bidirectional DC / DC converter, the high-voltage side of the bidirectional DC / DC converter is connected with an external electronic device, and the control unit is used for acquiring information of an external electronic device, monitoring the state of the electric pile and controlling the series-parallel connection switching module and the bidirectional DC / DC converter to work. According to the type and the required power of the connected electronic device, the proper number of the connected electric piles and the series-parallel connection mode can be automatically matched, meanwhile, the performance condition of the electric piles can be monitored in real time, when the electric piles are subjected to performance degradation or faults, the electric piles with the problems can be automatically cut off, and the normal electric piles are connected to complement the vacant power, so the normal operation of the system is ensured.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a series-parallel switching system and an operating method of a fuel cell array. Background technique [0002] Fuel cells have the characteristics of high power generation efficiency, low emissions, low noise, small size, and fast response. They are energy conversion devices with high efficiency and great development potential. With the continuous advancement of technology and the continuous improvement of market demand, high-power fuel cells are becoming more and more popular in the market. Multiple stacks of fuel cells are connected in series and parallel to form a fuel cell array power generation system, which can effectively increase the power output capacity of fuel cells, but the fixed series and parallel connection method is difficult to meet various working conditions of power generation and electrolysis, and cannot guarantee that the stacks can be used under various w...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/42G01R31/3835
CPCH02J7/0024H02J7/0063H02J7/0029H01M10/4207H01M10/4257G01R31/3835H02J2207/20Y02E60/10
Inventor 黄青丹王婷延赵崇智黄慧红宋浩永
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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