CN-122003745-A - Separator for electrochemical device and electrochemical device including the same

Abstract

A separator for an electrochemical device includes a fluid inlet, a fluid outlet, a plurality of serpentine flow channels disposed between the fluid inlet and the fluid outlet, and an auxiliary flow channel extending in a first direction and connected to the inlet and the outlet of the plurality of serpentine flow channels, the first direction being a direction from the fluid inlet toward the fluid outlet. The plurality of serpentine flow channels includes a first serpentine flow channel and a second serpentine flow channel, and the inlet and outlet of the second serpentine flow channel are disposed closer to the fluid outlet in the first direction than the inlet and outlet of the first serpentine flow channel.

Inventors

• Ding Daxun
• JIN DONGZHEN
• JIN CHENGHAN
• Liang Zhengcheng
• YU DONGCHUN
• Yin Xiangxue
• ZHANG ZAIHE

Assignees

• 三星电机株式会社

Dates

Publication Date

20260508

Application Date

20250206

Priority Date

20240226

Claims (18)

1. 1. A separator for an electrochemical device, comprising: A fluid inlet; A fluid outlet; a plurality of serpentine flow channels disposed between the fluid inlet and the fluid outlet, and An auxiliary flow passage extending in a first direction and connected to the inlet and outlet of the plurality of serpentine flow passages, the first direction being a direction from the fluid inlet toward the fluid outlet, Wherein the plurality of serpentine flow channels comprises a first serpentine flow channel and a second serpentine flow channel, and the inlet and outlet of the second serpentine flow channel are disposed closer to the fluid outlet in the first direction than the inlet and outlet of the first serpentine flow channel.
2. 2. The separator of claim 1 wherein said auxiliary flow channel is a linear flow channel.
3. 3. The separator of claim 1 wherein said auxiliary flow channel is parallel to said first direction.
4. 4. The separator of claim 1, wherein the auxiliary flow channel is connected to the fluid inlet and the fluid outlet to have an integrated structure.
5. 5. The separator of claim 1 wherein the first serpentine flow passage is provided as a pair of first serpentine flow passages on one side and the other side of the auxiliary flow passage.
6. 6. The separator of claim 1, wherein an inlet of a serpentine flow channel of the plurality of serpentine flow channels disposed closest to the fluid inlet is connected to the fluid inlet.
7. 7. The separator of claim 1, wherein an outlet of a serpentine flow channel of the plurality of serpentine flow channels disposed closest to the fluid outlet is connected to the fluid outlet.
8. 8. The separator of claim 1 wherein the auxiliary flow channel is disposed in a central region in a second direction, the second direction being perpendicular to the first direction.
9. 9. The separator of claim 8 having a symmetrical configuration based on said auxiliary flow channel.
10. 10. The separator of claim 1 wherein the plurality of serpentine flow channels comprises a first flow channel in the first direction and a second flow channel in a second direction, the second direction being perpendicular to the first direction.
11. 11. The separator of claim 10, wherein the second flow passage is provided as a plurality of second flow passages, The first flow channel is connected to the plurality of second flow channels, and The plurality of second flow channels are connected to the auxiliary flow channel.
12. 12. The separator of claim 1 wherein the auxiliary flow channel is provided as a plurality of auxiliary flow channels, and The fluid inlet and the fluid outlet are provided as a plurality of fluid inlets and a plurality of fluid outlets, respectively, to be connected to the auxiliary flow passage.
13. 13. The separator of claim 12, wherein the plurality of auxiliary flow channels are disposed in a peripheral region in a second direction, the second direction being perpendicular to the first direction.
14. 14. The separator of claim 13 wherein said plurality of serpentine flow channels comprises a first flow channel in said first direction and a plurality of second flow channels in said second direction, The first flow channel is connected to the plurality of second flow channels, and The plurality of second flow channels are connected to the plurality of auxiliary flow channels.
15. 15. The separator of claim 14, wherein the first flow channel is disposed in a central region in the second direction.
16. 16. The separator of claim 15 having a symmetrical configuration based on said first flow path.
17. 17. The separator of claim 1 wherein a width of the auxiliary flow channel in a second direction is less than a width of each of the first and second serpentine flow channels in the first direction, the second direction being perpendicular to the first direction.
18. 18. An electrochemical device comprising: a plurality of separators, and An electrochemical cell disposed between the plurality of separators, Wherein at least one of the plurality of baffles comprises a fluid inlet, a fluid outlet, a plurality of serpentine flow channels disposed between the fluid inlet and the fluid outlet, and auxiliary flow channels extending in a first direction from the fluid inlet toward the fluid outlet and connected to the inlets and outlets of the plurality of serpentine flow channels, and Wherein the plurality of serpentine flow channels comprises a first serpentine flow channel and a second serpentine flow channel, and the inlet and outlet of the second serpentine flow channel are disposed closer to the fluid outlet in the first direction than the inlet and outlet of the first serpentine flow channel.

Description

Separator for electrochemical device and electrochemical device including the same Technical Field The present disclosure relates to a separator for an electrochemical device and an electrochemical device. Background The electrochemical device may include a fuel cell that generates electric energy by electrochemically reacting fuel (hydrogen) and oxidant (pure oxygen or atmospheric oxygen), an electrolytic cell that generates hydrogen and oxygen by electrolyzing water, and the like. As an example of such an electrochemical device, a Solid Oxide Fuel Cell (SOFC) and a Solid Oxide Electrolytic Cell (SOEC) may include a cell including an air electrode, a fuel electrode, and a solid electrolyte having oxygen ion conductivity, and the cell may be referred to as a solid oxide cell. The solid oxide cell may generate electric energy through an electrochemical reaction or may generate hydrogen by electrolyzing water through a reverse reaction of the solid oxide fuel cell. In addition, other types of fuel cells or water electrolysis cells, such as Phosphoric Acid Fuel Cells (PAFCs), alkaline Fuel Cells (AFCs), polymer electrolyte fuel cells (PEMFCs), and Direct Methanol Fuel Cells (DMFCs), may also be used in the form of electrochemical devices. For the electrochemical device, a stacked structure in which unit cells are disposed between a pair of separators is generally used. Here, a flow passage through which a fluid can flow is formed in the separator. Water vapor, hydrogen, oxygen, etc. may flow through the flow channels of the separator, and the direction, speed, flow rate, etc. of the fluid may have a significant effect on the performance of the electrochemical device. Accordingly, research has been recently conducted in this technical field to optimize the size, shape, etc. of the flow channel. Disclosure of Invention Technical problem An aspect of the present disclosure is to realize a separator for an electrochemical device, which is designed to provide high performance when applied to an electrochemical device. Solution to the problem As a method of solving the above-described problems, the present disclosure proposes a new structure of a separator for an electrochemical device, in particular, the separator includes a fluid inlet, a fluid outlet, a plurality of serpentine flow channels disposed between the fluid inlet and the fluid outlet, and an auxiliary flow channel extending in a first direction, which is a direction from the fluid inlet toward the fluid outlet, and connected to the inlet and the outlet of the plurality of serpentine flow channels. The plurality of serpentine flow channels includes a first serpentine flow channel and a second serpentine flow channel, and the inlet and outlet of the second serpentine flow channel are disposed closer to the fluid outlet in the first direction than the inlet and outlet of the first serpentine flow channel. In an embodiment, the auxiliary flow channel may comprise a linear flow channel. In an embodiment, the auxiliary flow channel may be parallel to the first direction. In an embodiment, the auxiliary flow channel may be connected to the fluid inlet and the fluid outlet to have an integrated structure. In an embodiment, the first serpentine flow passage may be provided as a pair of first serpentine flow passages on one side and the other side of the auxiliary flow passage. In an embodiment, an inlet of a serpentine flow channel among the plurality of serpentine flow channels disposed closest to the fluid inlet may be connected to the fluid inlet. In an embodiment, an outlet of a serpentine flow channel among the plurality of serpentine flow channels disposed closest to the fluid outlet may be connected to the fluid outlet. In an embodiment, the auxiliary flow channel may be arranged in a central region in a second direction, the second direction being perpendicular to the first direction. In an embodiment, a symmetrical structure based on the auxiliary flow channel may be formed. In an embodiment, the plurality of serpentine flow channels may include a first flow channel in the first direction and a second flow channel in a second direction, the second direction being perpendicular to the first direction. In an embodiment, the second flow passage may be provided as a plurality of second flow passages, the first flow passage may be connected to the plurality of second flow passages, and the plurality of second flow passages may be connected to the auxiliary flow passage. In an embodiment, the auxiliary flow channel may be provided as a plurality of auxiliary flow channels, and the fluid inlet and the fluid outlet may be provided as a plurality of fluid inlets and a plurality of fluid outlets, respectively, to be connected to the auxiliary flow channels. In an embodiment, the plurality of auxiliary flow channels may be disposed in an outer peripheral region in a second direction, the second direction being perpendicular to the first direction. In an embodiment