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Cooling plate having improved flow channels

A flow channel and cooling plate technology, which is applied to fuel cell parts, fuel cell additives, fuel cells, etc., can solve problems such as adverse effects of electrochemical reactions, deformation of cooling plate 5, large current density deviation, etc.

Inactive Publication Date: 2008-01-16
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is a large temperature difference, it is possible to deform the cooling plate 5 due to thermal stress
Most importantly, a large temperature difference will adversely affect the electrochemical reactions of adjacent unit cells 10
That is, when the temperature difference is large, the resistance in each part of the electrolyte membrane 2 in the unit cell 10 changes, resulting in a large current density deviation, so the voltage of the generated electricity is unstable.

Method used

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  • Cooling plate having improved flow channels
  • Cooling plate having improved flow channels
  • Cooling plate having improved flow channels

Examples

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Embodiment Construction

[0018] 5 is a perspective view of the structure of a fuel cell stack 20 using a cooling plate 100 according to an embodiment of the present invention, and FIG. 6 is an enlarged view of the cooling plate 100 shown in FIG. 5 .

[0019] 5 and 6, the cooling plate 100 is installed on the battery stack 20 so that cooling water flows through the flow channel 110 of the cooling plate 100 and functions to absorb heat from the heat generating body. That is, the cooling water flowing in through the inlet 110a of each cooling plate 100 absorbs heat from the unit cell 10 of the fuel cell as a heat generating body while flowing through the flow channel 110 and flows out of the cooling plate 100 through the outlet 110b, so that It is cooled in heat exchanger 30 for recirculation.

[0020] However, in the cooling plate 100 in one embodiment of the present invention, the flow channel 110 is not formed in a straight line as in the prior art, but is formed in different volumes in different part...

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PUM

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Abstract

A cooling plate in which flow channels are modified to reduce temperature differences between portions of the cooling plate and provide for more uniform heat distribution within a heat generator. The flow channels of the cooling plate are formed such that a central portion of the flow channels has a greater volume than the end portions near an inlet and an outlet so that the amount of cooling water that is contained in the central portion at any one time is larger than either of the end portions near the inlet and the outlet. Likelihood of thermal deformation of the cooling plate due to thermal stress is decreased, and stability of performance of the fuel cell is increased.

Description

technical field [0001] The invention relates to a cooling plate for cooling a fuel cell and, more particularly, to a cooling plate having improved flow passages for reducing the temperature differential between portions of the cooling plate. Background technique [0002] A fuel cell is a power generator that converts the chemical energy of fuel into electrical energy through a chemical reaction. As long as the fuel is supplied, the fuel cell can continue to generate electricity. FIG. 1 is a schematic diagram of an energy conversion structure of a fuel cell. Referring to FIG. 1 , when oxygen-containing air is supplied to cathode 1 and hydrogen-containing fuel is supplied to anode 3 , electricity is generated by electrolysis of water and reverse reaction through electrolyte membrane 2 . However, generally, the electricity generated by the unit cell 10 does not have a usable high voltage. Therefore, as shown in FIG. 2 , power is generated by a battery stack 20 in which a plur...

Claims

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Application Information

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IPC IPC(8): H01M8/04H01M8/02
CPCH01M8/0267H01M8/026Y02E60/50H01M8/04074H01M8/04029H01M8/0265H01M8/241H01M8/0258H01M8/2483H01M8/02H01M8/04
Inventor 慎宰英彭杰李承宰宋泰元
Owner SAMSUNG SDI CO LTD