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A fuel cell stack with adjustable end plate force

An adjustable fuel cell stack technology, which is applied to fuel cells, circuits, electrical components, etc., can solve the problems of unequal stress and inability to adjust fuel cell assembly force, so as to extend the life of the stack and prevent the sealing effect of the stack Poor, the effect of preventing reaction gas leakage

Active Publication Date: 2020-11-24
上海青氢科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a fuel cell stack with adjustable force on the end plate, to solve the problem that the force on each point between the bipolar plates in the fuel cell in the prior art is not equal, and the inside of the fuel cell cannot be adjusted during use. Technical Problems in Adjusting Assembly Force

Method used

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  • A fuel cell stack with adjustable end plate force
  • A fuel cell stack with adjustable end plate force
  • A fuel cell stack with adjustable end plate force

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Embodiment 1

[0036] Combine below Figure 1 to Figure 3 As shown, the embodiment of the present invention provides a fuel cell stack with adjustable end plate force, including a stack mechanism 1, and the two ends of the stack mechanism 1 are respectively provided with a fixed end plate 2 and an adjustable end plate mechanism 3. The adjustment end plate mechanism 3 includes an adjustment end plate 31 and an adjustment assembly 32 matched with the adjustment end plate 31, the adjustment assembly 32 is located between the adjustment end plate 31 and the stack mechanism 1, and the fixed end plate 2 and the adjusting end plate 31 are provided with several fixed rods 4 for connecting the two, and the two ends of each fixed rod 4 are respectively connected with the fixed end plate 2 and the adjusting end plate 31 by bolts; the adjusting assembly 32 includes A spring end plate 321, one side of the spring end plate 321 is fixedly connected to the electric stack mechanism 1, and the adjusting end p...

Embodiment 2

[0042] combine Figure 4-6 As shown, the present invention provides a fuel cell stack with adjustable end plate force, including a stack mechanism 1, and the two ends of the stack mechanism 1 are respectively provided with a fixed end plate 2 and an adjustable end plate mechanism 3, The adjustment end plate mechanism 3 includes an adjustment end plate 31 and an adjustment assembly 32 matched with the adjustment end plate 31, the adjustment assembly 32 is located between the adjustment end plate 31 and the stack mechanism 1, the fixed end plate 2 and the adjustment There are several fixed rods 4 for connecting the two end plates 31, and the two ends of each fixed rod 4 are respectively connected with the fixed end plate 2 and the adjustment end plate 31 by bolts; the adjustment assembly 32 includes a spring end Plate 321 , one side of the spring end plate 321 is fixedly connected with the electric stack mechanism 1 , and the adjusting end plate mechanism 3 is used to provide th...

Embodiment 3

[0048] combine Figure 7-Figure 9 As shown, the present invention provides a fuel cell stack with adjustable end plate force, including a stack mechanism 1, and the two ends of the stack mechanism 1 are respectively provided with a fixed end plate 2 and an adjustable end plate mechanism 3, The adjustment end plate mechanism 3 includes an adjustment end plate 31 and an adjustment assembly 32 matched with the adjustment end plate 31, the adjustment assembly 32 is located between the adjustment end plate 31 and the stack mechanism 1, the fixed end plate 2 and the adjustment There are several fixed rods 4 for connecting the two end plates 31, and the two ends of each fixed rod 4 are respectively connected with the fixed end plate 2 and the adjustment end plate 31 by bolts; the adjustment assembly 32 includes a spring end Plate 321 , one side of the spring end plate 321 is fixedly connected with the electric stack mechanism 1 , and the adjusting end plate mechanism 3 is used to pro...

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Abstract

The invention discloses a fuel cell stack with adjustable force on the end plate, which relates to the technical field of fuel cells and includes a stack mechanism. The two ends of the stack mechanism are respectively provided with a fixed end plate and an adjustable end plate mechanism, and the adjustable end plate The mechanism includes an adjustment end plate and an adjustment assembly matched with the adjustment end plate. The adjustment assembly is located between the adjustment end plate and the stack mechanism. The adjustment assembly includes a spring end plate. One side of the spring end plate is fixedly connected with the stack mechanism. The adjustment end The plate mechanism provides the stack mechanism with gradually decreasing pressure from the center of the spring end plate to the surroundings. The invention adjusts the work of the components so that the stress on each point inside the stack is the same, and further improves the stack structure design of the fuel cell, which can not only avoid the excessive initial assembly gap between the polar plate and the MEA, but also prevent the poor sealing effect of the stack and reaction gas leakage, causing more serious consequences, improving the performance, quality and service life of the fuel cell, and reducing the safety hazards when the fuel cell is used.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell stack with adjustable stress on end plates. Background technique [0002] The fuel cell stack is assembled by a number of identical single cells in series, mainly including end plates, bipolar plates, membrane electrodes, sealing gaskets and other components, in which each single cell receives assembly pressure under the action of fastening bolts on the end plates , the bipolar plate is a statically indeterminate assembly between the MEA. Gan Frequency and others pointed out in "Distribution Law of Metal Plate Fuel Cell Stack Contact Pressure" that the transfer mechanism of the internal assembly pressure of the stack is: after the torque is applied, the end plate generates an assembly force on the metal plate, and the metal plate Under the action of assembly force, the compression gasket reduces its thickness and makes contact with the MEA. Therefore, after the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/248
CPCH01M8/248Y02E60/50
Inventor 刘建飞徐黎明许康
Owner 上海青氢科技有限公司
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