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Fuel cell stack fixed structure convenient for adjustment

A technology for fuel cell stacks and fixed structures, which is applied in the direction of fuel cells, fuel cell groups, fuel cell components, etc. It can solve the problems that the stack cannot be guaranteed to be uniformly stressed, the fixing effect cannot be guaranteed, and the screws are easy to loosen, etc. , to achieve the effect of eliminating loosening, solving loosening and uniform pressure

Active Publication Date: 2015-04-22
江苏氢电新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The fixing belt in this public document fixes the lower end of the electric stack, and adjusts the fastening of the electric stack by applying pressure on the upper end of the electric stack. The structure is complicated, the adjustment is inconvenient, and it cannot ensure that the electric stack in the frame is evenly stressed during the fastening process, and the screw is easy to fix. There is looseness, and the fixing effect cannot be guaranteed

Method used

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  • Fuel cell stack fixed structure convenient for adjustment
  • Fuel cell stack fixed structure convenient for adjustment

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Embodiment 1

[0022] Example 1: Such as figure 1 , figure 2 The easy-to-adjust fuel cell stack fixing structure shown includes end plates arranged at both ends of the fuel cell stack in the stacking direction, and 6 sets of T-shaped screw rods 1, T-shaped screw rods 2, and connecting nuts 3 for fixing and connecting the end plates. , Set screw 4 and limit block 5, 6 groups are evenly distributed on both sides of the long side of the end plate, that is, there are 3 groups on the long side of each side, arranged in the upper, middle and lower.

[0023]T-shaped screw 1 and T-shaped screw 2 are made of stainless steel. The total thickness of the fuel cell stack is 520mm. The length of T-shaped screw 1 is 1 / 5 of the total thickness of the fuel cell stack. / 5. According to the number of fuel cells contained in the fuel cell stack, the selected T-shaped screw 1 and T-shaped screw 2 have a diameter of 5 mm and a thread of M5. The inner thread of the connecting nut is matched with T-shaped scr...

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Abstract

The invention discloses a fuel cell stack fixed structure convenient for adjustment. The structure includes end plates arranged at two ends in the stacking direction of the fuel cell stack. The end plates at two ends are in fixed connection through several sets of T-shaped threaded rods 1, T-shaped threaded rods 2, connecting nuts, stop screws and limiting blocks. One ends of the T-shaped threaded rods 1 are fixed on the end plate at one end through the limiting blocks, the other ends of the T-shaped threaded rods 1 are connected to one ends of the T-shaped threaded rods 2 through the connecting nuts, the other ends of the T-shaped threaded rods 2 are fixed on the end plate at the other end through the limiting blocks, and the connecting nuts are fastened through the stop screws. By disposing adjustable connection structures at side edges of the end plates, the distance between the end plates can be controlled precisely to realize fastening of the fuel cell stack formed by different amounts of cells, the adjustment process is simple, and loosening, fastening force decline and other problems can be avoided. By adjusting the connecting nuts, the fastening force can be restored, and normal operation of the fuel cell stack can be ensured.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an adjustable fuel cell stack fixing structure. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) technology is the most efficient means of utilizing hydrogen energy. A fuel cell is a device that directly converts the chemical energy of hydrogen into electrical energy. It has the advantages of high efficiency, low noise, and zero pollution, and is playing an increasingly important role in today's society. Fuel cells usually need to assemble multiple single cells in series to form a stack. It is mainly composed of end plates on both sides, bipolar plates, and membrane electrodes, which are pressed down by a stacking press and fixed by fixing parts. The reliability of the fixing part in the long-term use determines the service life of a stack. The traditional fixing parts are fixed by screws and nuts. During use, the vibration and thermal expansion and ...

Claims

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Application Information

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IPC IPC(8): H01M8/24H01M8/02H01M8/247H01M8/248
CPCH01M8/248Y02E60/50
Inventor 程立明王习鹏
Owner 江苏氢电新能源有限公司
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