Separator, electrochemical cell, stack and device

Abstract

This invention relates to a separator, an electrochemical cell, a fuel cell stack, and an apparatus. The separator has a frame and flow path walls. The height of the flow path wall at the end of the first supply-side connecting groove on the discharge area side is lower than the height of the flow path wall between the first supply-side connecting groove and the first discharge-side connecting groove; the thickness of the flow path wall at the end of the first supply-side connecting groove on the discharge area side is thinner than the thickness of the flow path wall between the first supply-side connecting groove and the first discharge-side connecting groove; the end of the frame on the discharge area side of the first supply-side connecting groove is raised, such that the depth of the end of the first supply-side connecting groove on the discharge area side is shallower than the depth of the end of the first supply-side connecting groove on the supply area side; a through hole is provided in the flow path wall at the end of the first supply-side connecting groove on the discharge area side; or a branch is provided in the flow path wall at the end of the first supply-side connecting groove on the discharge area side.

Description

Technical Field

[0001] This invention relates to separators, electrochemical cells, fuel cell stacks, and devices. Background Technology

[0002] In recent years, expectations for renewable energy have been rising. Examples of renewable energy sources include solar power, hydropower, wind power, and geothermal power.

[0003] Moreover, as an attempt at decarbonization, fuel cell-based power generation and electrolysis-based energy conversion have attracted attention. Summary of the Invention

[0004] One embodiment provides a baffle that facilitates uniform fluid flow.

[0005] The partition in this embodiment has a frame and a flow path wall. The flow path wall divides the frame into a supply area, a discharge area, and a groove area. The groove area includes a first groove group between the supply area and the discharge area. The first groove group includes a first supply-side connecting groove with a larger opening on the supply area side than on the discharge area side, and a first discharge-side connecting groove with a larger opening on the discharge area side than on the supply area side. A flow path wall is provided at the end of the first supply-side connecting groove on the discharge area side. The height of the flow path wall at the end of the discharge area side of the first supply-side connecting groove is lower than the height of the flow path wall between the first supply-side connecting groove and the first discharge-side connecting groove; the thickness of the flow path wall at the end of the discharge area side of the first supply-side connecting groove is thinner than the thickness of the flow path wall between the first supply-side connecting groove and the first discharge-side connecting groove; the end of the first supply-side connecting groove at the discharge area side of the frame is raised so that the depth of the end of the first supply-side connecting groove at the discharge area side is shallower than the depth of the end of the first supply-side connecting groove at the supply area side; a through hole is provided in the flow path wall at the end of the first supply-side connecting groove at the discharge area side; or a branch is provided in the flow path wall at the end of the first supply-side connecting groove at the discharge area side.

[0006] Based on the above structure, a baffle is provided that allows fluid to flow easily and uniformly. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the partition in the implementation method.

[0008] Figure 2 This is a schematic diagram of the partition in the implementation method.

[0009] Figure 3 This is a schematic diagram of the partition in the implementation method.

[0010] Figure 4 This is a schematic cross-sectional view of the partition in the embodiment.

[0011] Figure 5 This is a schematic cross-sectional view of the partition in the embodiment.

[0012] Figure 6 This is a schematic cross-sectional view of the partition in the embodiment.

[0013] Figure 7 This is a schematic cross-sectional view of the partition in the embodiment.

[0014] Figure 8 This is a schematic cross-sectional view of the partition in the embodiment.

[0015] Figure 9 This is a schematic perspective view of the partition in the implementation method.

[0016] Figure 10 This is a schematic perspective view of the partition in the implementation method.

[0017] Figure 11 This is a schematic perspective view of the partition in the implementation method.

[0018] Figure 12 This is a schematic cross-sectional view of the partition in the embodiment.

[0019] Figure 13 This is a schematic cross-sectional view of the partition in the embodiment.

[0020] Figure 14 This is a schematic perspective view of the partition in the implementation method.

[0021] Figure 15 This is a schematic diagram of the partition in the implementation method.

[0022] Figure 16 This is a schematic diagram of the partition in the implementation method.

[0023] Figure 17 This is a schematic diagram of the partition unit in the implementation method.

[0024] Figure 18 This is a schematic diagram of an electrochemical cell according to an embodiment.

[0025] Figure 19 This is a schematic diagram of the fuel cell stack used in the implementation method.

[0026] Figure 20 This is a schematic diagram of the apparatus used in the implementation method.

[0027] Explanation of reference numerals in the attached figures

[0028] 1: Technical Solution

[0029] 1A: Flow path wall

[0030] 1B: Rib

[0031] 2: Supply Area

[0032] 2A: First Supply Tank

[0033] 2B: Second Supply Tank

[0034] 2C: Third Supply Tank

[0035] 2D: Fourth Supply Tank

[0036] 3: Tank area

[0037] 3A: First Tank Group

[0038] 3Aa: First supply-side connection groove

[0039] 3Ab: First discharge side connecting groove

[0040] 3B: Second Tank Group

[0041] 3Ba: Second supply-side connection groove

[0042] 3Bb: Second discharge side connecting groove

[0043] 3C: Third Tank Group

[0044] 3Ca: Third supply-side connection channel

[0045] 3Cb: Third discharge side connection groove

[0046] 3D: The Fourth Slot Group

[0047] 3Da: Fourth supply-side connection channel

[0048] 3Db: Fourth discharge side connection groove

[0049] 3E: Fifth Slot Group

[0050] 3Ea: Fifth supply-side connection channel

[0051] 3Eb: Fifth discharge side connection groove

[0052] 3F: Sixth Tank Group

[0053] 3Fa: Sixth supply-side connection channel

[0054] 3Fb: Sixth row side connection groove

[0055] 3G: The Seventh Slot Group

[0056] 3Ga: Seventh Supply-Side Connection Channel

[0057] 3Gb: Seventh row side connection groove

[0058] 3H: Eighth Tank Group

[0059] 3Ha: Eighth supply-side connection channel

[0060] 3Hb: Eighth discharge side connection groove

[0061] 3J: Ninth Channel Group

[0062] 3Ja: Ninth Supply-Side Connection Channel

[0063] 3Jb: Ninth discharge side connecting groove

[0064] 3K: The Tenth Slot Group

[0065] 3Ka: Tenth Supply-Side Connection Channel

[0066] 3Kb: Tenth discharge side connection groove

[0067] 3L: Eleventh Tank Group

[0068] 3La: Eleventh Supply-Side Connection Channel

[0069] 3Lb: Eleventh discharge side connecting groove

[0070] 3M: Twelfth Tank Group

[0071] 3Ma: Twelfth supply-side connection groove

[0072] 3Mb: Twelfth discharge side connection groove

[0073] 4: Discharge area

[0074] 4A: First discharge slot

[0075] 4B: Second discharge slot

[0076] 4C: Third discharge slot

[0077] 4D: Fourth discharge slot

[0078] 5: Framework

[0079] 11: Support body

[0080] 12: Supply connection path

[0081] 13: Supply Manifold

[0082] 14: Drain connecting paths

[0083] 15: Exhaust manifold

[0084] 21: First electrode

[0085] 21A: Substrate

[0086] 21B: Catalyst layer

[0087] 22: Second electrode

[0088] 22A: Substrate

[0089] 22B: Catalyst layer

[0090] 23: Next door

[0091] 24: First partition

[0092] 25: Second partition

[0093] 31: Fastening plate

[0094] 32: Fastening plate

[0095] 41: Anode current collector

[0096] 42: Cathode current collector

[0097] 43: Power supply, load

[0098] 100: partition

[0099] 101: Partition

[0100] 102: Partition

[0101] 200: Partition unit

[0102] 300: Electrochemical Battery

[0103] 400: Fuel cell stack

[0104] 500: Device Detailed Implementation

[0105] The physical property values ​​in the instruction manual are values ​​at a temperature of 25°C and a pressure of 1 atm. The thickness of each component is the average of the distances in the stacking direction.

[0106] (First Implementation)

[0107] The first embodiment relates to a baffle. The baffle is a flow-guiding plate (a baffle with a flow path) used when supplying gas to a gas diffusion layer or the like. Figure 1 A schematic diagram illustrating the partition 100 of the embodiment. Figure 2 A schematic diagram showing partition 101. Figure 3 This is a schematic diagram showing partition 102. The description of partition 100 is the same as that of partition 101 and partition 102.

[0108] Figure 4 express Figure 1 A schematic sectional view of partition 100 along line A-A'. Figure 5 express Figure 1 A schematic cross-sectional view of the partition 100 along line B-B'. Figure 6 express Figure 2 A schematic cross-sectional view of partition 101 along line A-A'. Figure 7 express Figure 2 A schematic cross-sectional view of the partition 100 along line B-B'.

[0109] The partition 100 has a flow path wall 1A, a rib 1B, and a frame 5 supporting the flow path wall 1A and the rib 1B. The partition 101 has a flow path wall 1A and a frame 5 supporting the flow path wall 1A and the rib 1B. The directions in the figure are represented by X, Y, and Z.

[0110] The flow path wall 1A is, for example, made of metal. The rib 1B is, for example, made of metal. The frame 5 is, for example, made of metal.

[0111] The separator 100 of the first embodiment is used, for example, in an electrochemical cell for a fuel cell or for electrolysis. The separator 100 supplies fluid for the electrode reaction and discharges fluid containing the products of the electrode reaction. The fluid is a gas and / or a liquid.

[0112] Fluid enters from the supply port IN and exits from the discharge port OUT. The baffle 100 preferably has a single supply port IN and a single discharge port OUT. Fluid may flow from the supply port IN side to the discharge port OUT side, for example, due to the pressure difference between the supply port IN and the discharge port OUT.

[0113] The flow path wall 1A is installed on the frame 5 and is a wall-shaped component that divides the flow path. The flow path wall 1A divides the space on the frame 5 into a supply area 2 that is connected to the flow path on the supply port IN side and the fluid mainly diffuses in the second direction, a discharge area 4 that is connected to the flow path on the discharge port OUT side and the fluid mainly flows in the second direction, and a groove area 3 that connects the supply area 2 and the discharge area 4 in the second direction and the fluid mainly diffuses in the first direction.

[0114] Rib 1B is a wall-like or protruding structure disposed on frame 5. Protruding rib 1B has one or more shapes selected from cylinders, polygonal prisms, frustums of cones, and truncated pyramids. Wall-like rib 1B has a plate-like shape extending regularly or irregularly in the surface direction of frame 5. Protruding rib 1B and / or wall-like rib 1B are preferably physically separated from flow path wall 1A.

[0115] Figure 1 The ribs 1B of the partition 100 are integrally arranged in columnar form in the supply area 2 and the discharge area 4.

[0116] Figure 2 The partition 101 has a flow path wall 1A in the supply area 2 and the discharge area 4, which separates the supply area 2 and the discharge area 4. No ribs 1B are provided. The area where the flow path wall 1A is provided is the trough area 3. The flow path wall 1A (trough area 3) is located between the supply area 2 and the discharge area 4.

[0117] The supply port IN is the opening on the supply area 2 side of the partition 100. The discharge port OUT is the opening on the discharge area 4 side of the partition 100.

[0118] Figure 3 The ribs 1B of the partition 102 are provided in the supply area 2 and the discharge area 4. Figure 3 The supply area 2 of the partition 102 is provided with columnar ribs 1B and wall-shaped ribs 1B (guide ribs). Figure 3 The discharge area 4 of the partition 102 is provided with a flow path wall 1A and columnar ribs 1B.

[0119] The flow path wall 1A or flow path wall 1A and rib 1B on the side of the partition 100 opposite to the frame 5 are in contact with the gas diffusion layer, for example. The groove of the partition 100 is connected to the gas diffusion layer, for example. The groove of the partition 100 is connected to the gas diffusion layer as a whole, for example. That is, the gap of the groove as a whole becomes the flow path of fluid to the gas diffusion layer.

[0120] Preferably, the supply area 2, the tank area 3, and the discharge area 4 are all opened on the side opposite to the frame 5. That is, the supply area 2, the tank area 3, and the discharge area 4 are surfaces that are in overall contact with the gas diffusion layer.

[0121] By providing flow path wall 1A or flow path wall 1A and rib 1B on frame 5, contact between gas diffusion layer and frame 5 is suppressed. Gas diffusion layer preferably has direct contact with flow path wall 1A or flow path wall 1A and rib 1B.

[0122] The baffle 100 is an interdigitated flow channel type baffle. The interdigitated flow channel type baffle has a structure in which slots connected to the supply flow path and slots connected to the discharge flow path are arranged alternately. The direction of this slot arrangement is perpendicular to the length direction of the slots in the slot region 3. The direction of this slot arrangement is opposite to the direction from the supply region 2 towards the discharge region 3. Contrary to the contemplation of the embodiment, fluid can also flow from the discharge side of the baffle 100 to the supply side.

[0123] The space enclosed by the flow path wall 1A and the frame 5 is a groove. The groove is formed by the flow path wall 1A. The outermost part of the flow path wall 1A forms the frame of the baffle 100. The groove exists between the flow path walls 1A. Fluid flows in the groove.

[0124] The partition 100 has a supply area 2, a trough area 3, and a discharge area 4. A flow path wall 1A divides the supply area 2, the trough area 3, and the discharge area 4. The flow path of the supply area 2 is connected to the flow path of the trough area 3. The flow path of the trough area 3 is connected to the flow path of the discharge area 4. A flow path connection means, for example, that the spaces of the supply area 2 and the trough area 3 are connected without being separated by the flow path wall 1A. A flow path connection means, for example, that the spaces of the discharge area 4 and the trough area 3 are connected without being separated by the flow path wall 1A. A flow path connection means, for example, that the spaces of the discharge area 4 and the trough area 3 are connected via an opening on the discharge area 4 side of the flow path wall 1A.

[0125] Supply region 2 connects supply port IN and tank region 3. Supply region 2 is a region where fluid entering from supply port IN diffuses. In supply region 2, flow path wall 1A and / or rib 1B are provided on frame 5. Flow path wall 1A of supply region 2 of partition 101 is connected to flow path wall 1A of tank region 3. The second direction is the length direction of supply region 2, and the fluid diffuses in the length direction of supply region 2 and in the first direction, with the fluid flowing towards tank region 3.

[0126] The partition 101 divides the supply area 2 into a flow path wall 1A. The supply area 2 includes a first supply channel 2A, a second supply channel 2B, a third supply channel 2C, and a fourth supply channel 2D.

[0127] The trough region 3 includes a group of troughs (3A~3M) connecting the supply region 2 and the discharge region 4. The troughs within the trough group are separated by flow path walls 1A. The troughs extend along a first direction (first direction) in which the supply region 2 and the discharge region 4 are arranged. Preferably, the troughs within the trough group do not include reversible portions. Preferably, the troughs within the trough group extend only along the first direction.

[0128] The tank area 3 includes one or more tank groups, such as a first tank group 3A, a second tank group 3B, a third tank group 3C, a fourth tank group 3D, a fifth tank group 3E, a sixth tank group 3F, a seventh tank group 3G, an eighth tank group 3H, a ninth tank group 3J, a tenth tank group 3K, an eleventh tank group 3L, and a twelfth tank group 3M. Each tank group includes a supply-side connection tank and a discharge-side connection tank. For example, the first tank group 3A includes a first supply-side connection tank 3Aa and a first discharge-side connection tank 3Ab. The lengths of each tank group in the first direction are preferably the same or substantially the same (more than 98% and less than 102% of the average length of the tanks in the first direction).

[0129] Multiple slots are arranged in the second direction (Y direction). These slots can also be arranged offset in the second direction from the first direction. In the illustrated partitions 100-102, multiple slots are arranged offset in the second direction from the first direction, but they can also be arranged in the second direction without offset from the first direction. When multiple slots are arranged offset in the second direction from the first direction, in the second direction, the slots closer to the supply port IN are significantly offset towards the discharge region 4. The length of the supply region 2 in the first direction is longer on the side of the slots closer to the supply port IN, and the length of the discharge region 4 in the first direction is shorter on the side of the slots closer to the supply port IN. Preferably, the offset in the first direction is such that as the distance from the supply port IN in the second direction increases, the length of the supply region 2 in the first direction decreases, and the length of the discharge region 4 in the first direction increases.

[0130] Figure 1 partition 100 and Figure 2 The offset of the multiple slot groups of the partition 101 in the first direction differs in the first group consisting of the first slot group 3A, the second slot group 3B, and the third slot group 3C; the second group consisting of the fourth slot group 3D, the fifth slot group 3E, and the sixth slot group 3F; the third group consisting of the seventh slot group 3G, the eighth slot group 3H, and the ninth slot group 3J; and the fourth group consisting of the tenth slot group 3K, the eleventh slot group 3L, and the twelfth slot group 3M. The offset in the first direction is the same in each group. The slot groups in the first group are the ones closest to the supply port IN. The supply area 2 connected to the slot groups in the first group has the longest length in the first direction, while the discharge area 4 connected to the slot groups in the first group has the shortest length in the first direction (the slot groups closest to the supply port IN in the second direction offset the most towards the discharge area 4). From the second group to the fourth group relative to the first group, the further away from the first group in the second direction, the shorter the length of the supply area 2 connected to the tank group in the first direction, and the longer the length of the discharge area 4 connected to the tank group in the first direction (in the second direction, the farther the distance between the tank group and the supply port IN, the greater the offset towards the discharge area 4 on a group basis, with the group closest to the supply port IN as the reference). Therefore, the fourth group of tanks is the tank group that is farthest from the supply port IN, the supply area 2 connected to the fourth group of tanks has the shortest length in the first direction, and the discharge area 4 connected to the fourth group of tanks has the longest length in the first direction (in the second direction, the tank group that is farthest from the supply port IN has the greatest offset towards the supply area 2).

[0131] Figure 3The offsets of the multiple slot groups of the partition 102 are all different in the first direction. In the second direction, the length of the supply region 2 connected to the first slot group 3A, which is closest to the supply port IN, is the longest in the first direction among the slot groups in the first group. The length of the discharge region 4 connected to the first slot group 3A, which is closest to the supply port IN, is the shortest in the first direction among the slot groups in the first group (the slot group closest to the supply port IN in the second direction is offset the most towards the discharge region 4). Moreover, in the second direction, the length of the supply region 2 in the first direction of the third slot group 3C, which is farthest from the supply port IN, is the shortest in the first direction among the slot groups in the first group, and the length of the discharge region 4 is the longest in the first direction (the slot group farthest from the supply port IN in the second direction is offset the most towards the supply region 2). The longer the distance to the supply port IN in the second direction, the shorter the length of the supply region 2 in the first direction, and the longer the length of the discharge region 4 in the first direction. Specifically, each slot group is offset in the first direction so that the length of the supply region 2 connected to the twelfth slot group 3M is the shortest in the first direction, and the length of the discharge region 4 connected to the twelfth slot group 3M is the longest in the first direction. Figure 3 The offset of the multiple slot groups of the partition 102 can be periodic or non-linear.

[0132] Flow path wall 1A extends in a first direction between the supply-side connecting groove and the discharge-side connecting groove. Flow path wall 1A folds back along the end of the discharge-side connecting groove on the supply region 2 side. The portion of flow path wall 1A folded back along the end of the discharge-side connecting groove on the supply region 2 side extends in a second direction. Flow path wall 1A folds back along the end of the supply-side connecting groove on the discharge region 4 side. The portion of flow path wall 1A folded back along the end of the supply-side connecting groove on the discharge region 4 side extends in a second direction.

[0133] Unless otherwise specified, even the description of the first channel group 3A refers to the description of each channel group (the nth channel group, where n is an integer) included in the partition 100, unless otherwise specified. Similarly, even the description of the first supply-side connection channel 3Aa refers to the description of each supply-side connection channel (the nth supply-side connection channel, where n is an integer) included in the partition 100, unless otherwise specified. Likewise, even the description of the first discharge-side connection channel 3Ab refers to the description of each discharge-side connection channel (the nth discharge-side connection channel, where n is an integer) included in the partition 100, unless otherwise specified.

[0134] The supply-side connecting groove extending along the first direction is either a groove with a larger opening on the supply region 2 side than on the discharge region 4 side, or a groove with an opening on the supply region 2 side and a closed opening on the discharge region 4 side, and is a flow path connected to the flow path on the supply region 2 side. The discharge-side connecting groove extending along the first direction is either a groove with a larger opening on the discharge region 4 side than on the supply region 2 side, or a groove with a closed supply region 2 side and an open opening on the discharge region 4 side, and is a flow path connected to the flow path on the discharge region 4 side.

[0135] A supply-side connection groove is provided next to the discharge-side connection groove. In adjacent supply-side and discharge-side connection grooves, a supply-side connection groove is provided on one side of the flow path wall 1A located between them, and a discharge-side connection groove is provided on the opposite side. The supply-side and discharge-side connection grooves are preferably arranged alternately. The groove located next to the supply-side connection groove is preferably a discharge-side connection groove, but the supply-side connection grooves can also be arranged continuously. The discharge-side connection grooves can also be arranged continuously. The direction in which the supply-side and discharge-side connection grooves are arranged is preferably a direction perpendicular to the first direction (the second direction).

[0136] Discharge zone 4 connects tank zone 3 and outlet OUT. Discharge zone 4 is a region where fluid entering from tank zone 3 diffuses and is discharged from outlet OUT. In discharge zone 4, flow path wall 1A and / or rib 1B are provided on frame 5. Flow path wall 1A of the discharge zone 4 of baffle 101 is connected to flow path wall 1A of tank zone 3. The second direction is the length direction of discharge zone 4, and fluid diffuses in the length direction of discharge zone 4 as well as in the first direction, with fluid being discharged from outlet OUT.

[0137] The partition 101 is divided into a discharge area 4 by the flow path wall 1A. The discharge area 4 includes a first discharge channel 4A, a second discharge channel 4B, a third discharge channel 4C, and a fourth discharge channel 4D.

[0138] Figure 1 100 partitions Figure 2 Partition 101 Figure 3 The partition 102 includes 12 groups of channels, totaling 24 channels. Each channel group only needs to have one or more supply-side connection channels. The number of channel groups and the number of channels contained in each channel group can be selected appropriately according to the width of the flow path channel and the shape of the partition 100-102.

[0139] The first group of tanks 3A included in the tank area 3 includes a first supply-side connection tank 3Aa and a first discharge-side connection tank 3Ab. A portion of the fluid flowing into the first supply-side connection tank 3Aa flows over the common flow path wall 1A between the first supply-side connection tank 3Aa and the first discharge-side connection tank 3Ab and flows into the first discharge-side connection tank 3Ab.

[0140] The second group of tanks 3B includes a second supply-side connecting tank 3Ba and a second discharge-side connecting tank 3Bb. The third group of tanks 3C includes a third supply-side connecting tank 3Ca and a third discharge-side connecting tank 3Cb.

[0141] The fourth tank group 3D includes the fourth supply-side connecting tank 3Da and the fourth discharge-side connecting tank 3Db. The fifth tank group 3E includes the fifth supply-side connecting tank 3Ea and the fifth discharge-side connecting tank 3Eb. The sixth tank group 3F includes the sixth supply-side connecting tank 3Fa and the sixth discharge-side connecting tank 3Fb.

[0142] The seventh tank group 3G includes the seventh supply-side connection tank 3Ga and the seventh discharge-side connection tank 3Gb. The eighth tank group 3H includes the eighth supply-side connection tank 3Ha and the eighth discharge-side connection tank 3Hb. The ninth tank group 3J includes the ninth supply-side connection tank 3Ja and the ninth discharge-side connection tank 3Jb.

[0143] The tenth tank group 3K includes the tenth supply-side connecting tank 3Ka and the tenth discharge-side connecting tank 3Kb. The eleventh tank group 3L includes the eleventh supply-side connecting tank 3La and the eleventh discharge-side connecting tank 3Lb. The twelfth tank group 3M includes the twelfth supply-side connecting tank 3Ma and the twelfth discharge-side connecting tank 3Mb.

[0144] The width of the first supply-side connecting groove 3Aa (and the widths of the second supply-side connecting groove 3Ba, the third supply-side connecting groove 3Ca, etc.) W1 is preferably the same as the width of the first discharge-side connecting groove 3Ab (and the widths of the second discharge-side connecting groove 3Bb, the third discharge-side connecting groove 3Cb, etc.) W2. For example, the width W1 is preferably 95% or more and 105% or less of the width W2. It should be noted that, in the specification, the width refers to the length of the component in a direction perpendicular to the length direction or extension direction of the component along the surface direction of the frame 5.

[0145] The thickness of the flow path wall 1A provided at the end of the discharge area 4 side of the first supply-side connecting groove 3Aa (the thickness of the flow path wall 1A provided at the end of the discharge area 4 side of the second supply-side connecting groove 3Ba, the thickness of the flow path wall 1A provided at the end of the discharge area 4 side of the third supply-side connecting groove 3Ca, etc.) W4 (wherein, the thickness of the flow path wall 1A provided at the end of the discharge area 4 side of the first supply-side connecting groove 3Aa is greater than the thickness of the flow path wall 1A provided between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab). In the case of a thin section, the thickness W5 of the flow path wall 1A excluding the thin section is preferably the same as the width W3 of the flow path wall 1A provided between the first supply side connecting groove 3Aa and the first discharge side connecting groove 3Ab (the width of the flow path wall 1A provided between the second supply side connecting groove 3Ba and the second discharge side connecting groove 3Bb, the width of the flow path wall 1A provided between the third supply side connecting groove 3Ca and the third discharge side connecting groove 3Cb, etc.). For example, the width W4 is preferably 95% or more and 105% or less of the width W3.

[0146] More specifically, the width W3 of the flow path wall 1A between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab is the average width of the flow path wall 1A between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab, excluding the portion extending from the supply area 2 side of the first supply-side connecting groove 3Aa towards the center of the groove to 5% of the length L1 of the groove of the first supply-side connecting groove 3Aa and the portion extending from the discharge area 4 side of the first supply-side connecting groove 3Aa towards the center of the groove to 5% of the length L1 of the groove of the first supply-side connecting groove 3Aa.

[0147] Regarding any one or more supply-side connecting grooves in the group of grooves included in the partition 100 of the embodiment, it is preferable that the height of the flow path wall 1A provided at the end of the discharge area 4 side of the supply-side connecting groove is lower than the height of the flow path wall 1A provided between the supply-side connecting groove and the discharge-side connecting groove; the thickness of the flow path wall 1A provided at the end of the discharge area 4 side of the supply-side connecting groove is thinner than the thickness of the flow path wall 1A provided between the supply-side connecting groove and the discharge-side connecting groove; the end side of the frame 5 on the discharge area 4 side of the supply-side connecting groove is raised so that the depth of the end side of the discharge area 4 side of the supply-side connecting groove is shallower than the depth of the end side of the supply area 2 side of the supply-side connecting groove; a through hole is provided in the flow path wall 1A provided at the end of the discharge area 4 side of the supply-side connecting groove; or the flow path wall 1A provided at the end of the discharge area 4 side of the supply-side connecting groove is branched.

[0148] Preferably, the height H2 of the flow path wall 1A at the end of the discharge area 4 side of the first supply-side connecting groove 3Aa is lower than the height H1 of the flow path wall 1A located between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab. (Refer to...) Figure 4 The schematic diagram illustrates the height H1 of the flow path wall 1A provided at the end of the discharge area 4 side of the first supply side connecting groove 3Aa and the height H2 of the flow path wall 1A provided between the first supply side connecting groove 3Aa and the first discharge side connecting groove 3Ab. Figure 4 This is a schematic cross-sectional view of the first supply-side connecting channel 3Aa. The first supply-side connecting channel 3Aa has an opening at the end on the supply area 2 side, and a partially closed, partially open end on the discharge area 4 side. Figure 4 The diagram shows heights H1 and H2.

[0149] Height H1 is the third-direction length of the main flow path wall 1A, and is the depth of the first supply-side connecting groove 3Aa. The third direction is, for example, the Z direction, which is perpendicular to the surface direction of the frame 5. Specifically, height H1 is the height of the flow path wall 1A extending along the first direction on the center side of the first supply-side connecting groove 3Aa. More specifically, the height of the flow path wall 1A on the center side of the first supply-side connecting groove 3Aa is the average height of the flow path wall 1A disposed between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab, excluding the range from the supply area 2 side of the first supply-side connecting groove 3Aa towards the center of the groove to 5% of the length L1 of the groove of the first supply-side connecting groove 3Aa, and the range from the discharge area 4 side of the first supply-side connecting groove 3Aa towards the center of the groove to 5% of the length L1 of the groove of the first supply-side connecting groove 3Aa.

[0150] Height H2 is the height of the lowest portion of the flow path wall 1A (the length of the flow path wall 1A in the third direction) extending from the discharge area 4 side of the flow path wall 1A disposed between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab towards the center of the groove, up to 5% of the length L1 of the groove of the first supply-side connecting groove 3Aa. More specifically, height H2 is the height of the lowest portion of the flow path wall 1A extending in the second direction (the length of the flow path wall 1A in the first direction is the thickness of the flow path wall 1A) at the end of the flow path wall 1A at the discharge area 4 side of the first supply-side connecting groove 3Aa.

[0151] By making the height H2 smaller than the height H1, it is possible to suppress the presence of the flow volume flowing in the partition 100 on the discharge area 4 side of the first supply-side connecting channel 3Aa. This also prevents the accumulation of products of the electrolysis reaction using the partition 100, such as water and salt, on the flow path wall 1A extending in the second direction at the end of the discharge area 4 side of the first supply-side connecting channel 3Aa, thus preventing their discharge.

[0152] The difference between height H1 and height H2 (H1-H2) is preferably 100 [μm] or more and 1000 [μm] or less, more preferably 200 [μm] or more and 500 [μm] or less, and even more preferably 370 [μm] or more and 390 [μm] or less.

[0153] The difference between height H1 and height H2 (H1-H2) is preferably 20% or more and 82% or less of height H1, more preferably 25% or more and 50% or less, and even more preferably 29% or more and 32% or less.

[0154] When height H2 is lower than height H1, a portion of the flow path wall 1A at the end of the discharge area 4 side of the first supply-side connecting groove 3Aa is opened. The area of ​​the portion of the opening in the flow path wall 1A at the end of the discharge area 4 side is preferably the cross-sectional area of ​​the first supply-side connecting groove 3Aa (width W1 of the first supply-side connecting groove 3Aa). Figure 1 The percentage of the height H1 (as shown) is 20% or more and 82% or less, more preferably 25% or more and 50% or less, and even more preferably 29% or more and 32% or less.

[0155] The length of the portion of the flow path wall 1A at the end of the discharge area 4 side of the first supply side connecting groove 3Aa where the height decreases in the second direction is preferably 10% or more and 50% or less of the width W1 of the first supply side connecting groove 3Aa, more preferably 10% or more and 40% or less, and even more preferably 10% or more and 12% or less.

[0156] Figure 5 This is a schematic cross-sectional view of the first discharge side connection groove 3Ab, which is adjacent to the first supply side connection groove 3Aa of the partition 100. The supply area 2 of the first discharge side connection groove 3Ab is closed, and the discharge area 4 is open.

[0157] Figure 6 This is a schematic cross-sectional view of the first supply-side connecting groove 3Aa of the partition 101. Except for the presence or absence of ribs 1B and flow path walls 1A in the supply area 2 and discharge area 4, Figure 4 Schematic diagram and Figure 6 The diagram is the same.

[0158] Figure 7This is a schematic cross-sectional view of the first discharge side connecting groove 3Ab, which is adjacent to the first supply side connecting groove 3Aa of the partition 101. Except for the presence or absence of ribs 1B and flow path walls 1A in the supply area 2 and discharge area 4, Figure 5 Schematic diagram and Figure 7 The diagram is the same.

[0159] Figure 8 This is a schematic cross-sectional view of the second supply-side connecting groove 3Ba of the second groove group 3B of the partition 100. A portion of the supply-side connecting groove is shown below. Figure 8 As shown in the schematic diagram, the height H1 of the flow path wall 1A at the end of the discharge area 4 side of the second supply-side connecting groove 3Ba can be the same as or substantially the same as the height H2 of the flow path wall 1A between the second supply-side connecting groove 3Ba and the second discharge-side connecting groove 3Bb. The end of the discharge area 4 side of the second supply-side connecting groove 3Ba can be as follows: Figure 5 The schematic diagram shows the same shape as the first supply-side connecting groove 3Aa, or it could be... Figure 8 The schematic diagram shows the shape of the flow path wall 1A. That is, the height H1 of the flow path wall 1A provided at the end of the discharge area 4 of a portion of the supply side connection groove can be the same as or substantially the same as the height H2 of the flow path wall 1A provided between the supply side connection groove and the discharge side connection groove.

[0160] Of the first supply-side connecting groove 3Aa, the second supply-side connecting groove 3Ba, the third supply-side connecting groove 3Ca, the fourth supply-side connecting groove 3Da, the fifth supply-side connecting groove 3Ea, the sixth supply-side connecting groove 3Fa, the seventh supply-side connecting groove 3Ga, the eighth supply-side connecting groove 3Ha, the ninth supply-side connecting groove 3Ja, the tenth supply-side connecting groove 3Ka, the eleventh supply-side connecting groove 3La, and the twelfth supply-side connecting groove 3Ma, preferably, the height H2 of one or more supply-side connecting grooves is lower than the height H1; more preferably, the height H2 of more than half of the supply-side connecting grooves is lower than the height H1; and even more preferably, the height H2 of all supply-side connecting grooves is lower than the height H1. That is, among the multiple supply-side connecting grooves, preferably, the height H2 of one or more supply-side connecting grooves is lower than the height H1; more preferably, the height H2 of more than half of the supply-side connecting grooves is lower than the height H1; and even more preferably, the height H2 of all supply-side connecting grooves is lower than the height H1.

[0161] Next, refer to Figure 9 A three-dimensional schematic diagram is provided to illustrate the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab of the first groove group 3A. Figure 9 The schematic diagram shows three groups of grooves, which, from left to right, are designated as the first groove group 3A, the second groove group 3B, and the third groove group 3C. Dashed lines represent the shaded areas of groove 3. Figure 9 The partition in the schematic diagram has the following structure: Figure 1 In the partition 100, the height H2 of the flow path wall 1A at the end of the discharge area 4 side of the first supply-side connecting groove 3Aa is lower than the height H1 of the flow path wall 1A between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab. By adopting this structure in one or more groove groups included in the groove region 3, the depth of the groove on the discharge area 4 side can be made shallower without substantially changing the overall groove depth of the supply-side connecting groove, thereby suppressing retention on the discharge area 4 side of the supply-side connecting groove.

[0162] exist Figure 9 In the schematic diagram, the height H2 of the flow path wall 1A at the end of the discharge area 4 side of the first supply-side connecting groove 3Aa (the flow path wall 1A extending along the second direction at the end of the discharge area 4 side of the first supply-side connecting groove 3Aa) is lower than the height H1 of the flow path wall 1A disposed between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab. The heights of the flow path walls 1A at the ends of the discharge area 4 side of the second supply-side connecting groove 3Ba and the third supply-side connecting groove 3Ca are also lower, but the heights H2 of the second supply-side connecting groove 3Ba and the third supply-side connecting groove 3Ca can be the same as or different from the height H2 of the flow path wall 1A at the ends of the discharge area 4 side of the first supply-side connecting groove 3Aa.

[0163] exist Figure 9 In the schematic diagram, the height of the flow path wall 1A at the end of the supply area 2 side of the first discharge side connecting groove 3Ab is the same as the height H1 of the flow path wall 1A disposed between the first supply side connecting groove 3Aa and the first discharge side connecting groove 3Ab.

[0164] If the height H2 is small, the fluid may have difficulty flowing from the supply-side connection groove to the discharge-side connection groove through the gas diffusion layer. Therefore, the height H2 is preferably 25% or more and 200% or less of the thickness W4 of the flow path wall 1A, more preferably 28% or more and 100% or less, and even more preferably 32% or more and 36% or less.

[0165] Next, refer to Figure 10 A three-dimensional schematic diagram is provided to illustrate the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab of the first groove group 3A. Figure 9 The schematic diagram shows three groups of grooves, which, from left to right, are designated as the first groove group 3A, the second groove group 3B, and the third groove group 3C. Dashed lines represent the shaded areas of groove 3. Figure 9 The partition in the schematic diagram has the following structure: Figure 1In the partition 100, the thickness of the flow path wall 1A at the end of the discharge area 4 side of the first supply-side connecting groove 3Aa is thinner than the thickness of the flow path wall 1A between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab. By employing this structure in one or more groove groups included in the groove region 3, the depth of the groove on the discharge area 4 side can be made shallower without substantially changing the overall groove depth of the supply-side connecting groove (making it easier for the fluid to pass through the flow path wall 1A on the discharge area 4 side), and stagnation on the discharge area 4 side of the supply-side connecting groove can be suppressed.

[0166] exist Figure 10 In the schematic diagram, the thickness W5 of the flow path wall 1A at the end of the discharge area 4 side of the first supply-side connecting groove 3Aa (the flow path wall 1A extending along the second direction at the end of the discharge area 4 side of the first supply-side connecting groove 3Aa) is thinner than the thickness W3 of the flow path wall 1A disposed between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab. The thickness of the flow path wall 1A at the end of the discharge area 4 side of the second supply-side connecting groove 3Ba and the third supply-side connecting groove 3Ca is also thinner, but the thickness W5 of the flow path wall 1A at the end of the discharge area 4 side of the second supply-side connecting groove 3Ba and the third supply-side connecting groove 3Ca can be the same as or different from the thickness W5 of the flow path wall 1A at the end of the discharge area 4 side of the first supply-side connecting groove 3Aa.

[0167] The thickness W5 of the flow path wall 1A at the end of the discharge area 4 side of the first supply side connecting groove 3Aa is preferably 10% or more and 50% or less of the thickness W4 of the flow path wall 1A, more preferably 10% or more and 40% or less, and even more preferably 10% or more and 12% or less.

[0168] When the thickness of the flow path wall 1A at the end of the first supply-side connecting groove 3Aa on the discharge area 4 side is thinner than the thickness of the flow path wall 1A between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab, the thickness of the flow path wall 1A along the first direction at the end of the first supply-side connecting groove 3Aa on the discharge area 4 side can be the same as or thicker than the width W3 of the flow path wall 1A between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab. By increasing the thickness of the flow path wall 1A along the first direction at the end of the first supply-side connecting groove 3Aa on the discharge area 4 side, the reduction in strength of the thinned portion can be compensated.

[0169] The thickness of the flow path wall 1A along the first direction from the discharge area 4 side of the flow path wall 1A disposed between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab towards the center of the groove to 5% of the length L1 of the groove of the first supply-side connecting groove 3Aa (e.g., W3+(W1-L2) / 2) is preferably greater than 100% of the thickness W3 of the flow path wall 1A disposed between the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab, preferably 105% or more and 220% or less of the thickness W3, more preferably 106% or more and 160% or less of the thickness W3, and even more preferably 108% or more and 122% or less of the thickness W3.

[0170] The length L2 of the flow path wall 1A, which is thinner than the thickness of the flow path wall 1A between the first supply side connecting groove 3Aa and the first discharge side connecting groove 3Ab, is preferably 5% or more and 100% or less of the width W1 of the first supply side connecting groove 3Aa, more preferably 10% or more and 100% or less, and even more preferably 70% or more and 100% or less.

[0171] The partition 100 can be configured such that the thickness of the flow path wall 1A at the end of the discharge area 4 side of the supply-side connecting groove is thinner than the thickness of the flow path wall 1A between the supply-side connecting groove and the discharge-side connecting groove. Alternatively, the height H2 of the flow path wall 1A at the end of the discharge area 4 side of the supply-side connecting groove can be lower than the height H1 of the flow path wall 1A between the supply-side connecting groove and the discharge-side connecting groove. This structure can also be used in any group of grooves.

[0172] Next, refer to Figure 11 A three-dimensional schematic diagram is provided to illustrate the first supply-side connecting groove 3Aa and the first discharge-side connecting groove 3Ab of the first groove group 3A. Figure 11 The schematic diagram shows three groups of grooves, which, from left to right, are designated as the first groove group 3A, the second groove group 3B, and the third groove group 3C. Dashed lines represent the shaded areas of groove 3. Figure 11 The partition in the schematic diagram has the following structure: Figure 1 In the partition 100, the end side of the first supply-side connecting groove 3Aa on the discharge area 4 side of the frame 5 is raised, so that the depth of the end side of the first supply-side connecting groove 3Aa on the discharge area 4 side is shallower than the depth of the end side of the first supply-side connecting groove 3Aa on the supply area 2 side. By adopting this structure in one or more groove groups included in the groove area 3, the depth of the groove on the discharge area 4 side can be made shallower without substantially changing the overall groove depth of the supply-side connecting groove, and retention on the discharge area 4 side of the supply-side connecting groove can be suppressed.

[0173] By providing a ramp-shaped and / or inclined protrusion on the end side of the discharge area 4 side of the first supply side connecting groove 3Aa of the frame 5, the end side of the discharge area 4 side of the first supply side connecting groove 3Aa of the frame 5 is raised, and the groove on the end side of the discharge area 4 side of the first supply side connecting groove 3Aa of the frame 5 becomes shallower.

[0174] Preferably, the volume V1 per unit length of the groove (the average depth D1 of the groove in this range) from the discharge area 4 side of the first supply-side connecting groove 3Aa towards the center to 5% of the length L1 of the first direction of the first supply-side connecting groove 3Aa is smaller than the volume V2 per unit length of the first direction of the first supply-side connecting groove 3Aa (the average depth D2 of the groove in this range) of the portion of the first supply-side connecting groove 3Aa excluding the range from the supply area 2 side of the first supply-side connecting groove 3Aa towards the center to 5% of the length L1 of the first direction of the first supply-side connecting groove 3Aa and the range from the discharge area 4 side of the first supply-side connecting groove 3Aa towards the center to 5% of the length L1 of the first direction of the first supply-side connecting groove 3Aa.

[0175] If V1 (D1) is large, there may be a situation where the fluid has difficulty flowing from the supply side connection groove to the discharge side connection groove through the gas diffusion layer. Therefore, V1 (D1) is preferably 10% or more and 50% or less of V2 (D2), more preferably 10% or more and 40% or less, and even more preferably 10% or more and 12% or less.

[0176] like Figure 11 As shown in the schematic diagram, the following structure may not be used in all supply-side connecting grooves: the end side of the first supply-side connecting groove 3Aa on the discharge area 4 side of the frame 5 is raised, so that the depth of the end side of the first supply-side connecting groove 3Aa on the discharge area 4 side is shallower than the depth of the end side of the first supply-side connecting groove 3Aa on the supply area 2 side. For example, the end side of the frame 5 on the discharge area 4 side of the third supply-side connecting groove 3Ca is not raised.

[0177] Figure 12 This is a schematic cross-sectional view showing partition 100. (e.g.) Figure 12 As shown in the schematic diagram, the frame 5 can also be made to be stepped and raised. The raised part of the frame 5 is preferably in direct contact with the flow path wall 1A extending in the second direction at the end of the discharge area 4 side of the first supply side connecting groove 3Aa, but it can also be separated.

[0178] Figure 13 This is a schematic cross-sectional view showing partition 100. (e.g.) Figure 13 As shown in the schematic diagram, the frame 5 can also be raised by combining stepped protrusions and ramps.

[0179] The partition 100, which adopts a structure where the end side of the discharge area 4 of the supply-side connecting groove of the frame 5 is raised so that the depth of the end side of the discharge area 4 of the supply-side connecting groove is shallower than the depth of the end side of the supply area 2 of the supply-side connecting groove, can also adopt the following structure: the height H2 of the flow path wall 1A provided at the end of the discharge area 4 of the supply-side connecting groove is lower than the height H1 of the flow path wall 1A provided between the supply-side connecting groove and the discharge-side connecting groove, or / and the thickness of the flow path wall 1A provided at the end of the discharge area 4 of the supply-side connecting groove is thinner than the thickness of the flow path wall 1A provided between the supply-side connecting groove and the discharge-side connecting groove. Any one or more of the above structures can be combined in any group of grooves, or the above structures can be used individually.

[0180] Next, refer to Figure 14 A three-dimensional schematic diagram is provided, using the tenth tank group 3K, the eleventh tank group 3L, and the twelfth tank group 3M as examples, to illustrate the supply-side connecting tank and the discharge-side connecting tank. Figure 14 The schematic diagram shows three slot groups, which, from left to right, are designated as the tenth slot group 3K, the eleventh slot group 3L, and the twelfth slot group 3M. The dashed lines represent the negative lines of slot area 3. Figure 14 The diagram shows the partition and Figure 3 Similar to the partition 102, it has a structure in which the flow path wall 1A has through holes at the ends of the tenth supply-side connecting groove 3Ka and the twelfth supply-side connecting groove 3Ma on the discharge area 4 side, and / or a branch of the flow path wall 1A is provided at the end of the eleventh supply-side connecting groove La on the discharge area side. By adopting this structure in one or more groove groups included in the groove region 3, the depth of the groove on the discharge area 4 side can be made shallower without substantially changing the overall groove depth of the supply-side connecting groove, and retention on the discharge area 4 side of the supply-side connecting groove can be suppressed.

[0181] exist Figure 14 In the schematic diagrams of the tenth tank group 3K and the twelfth tank group 3M, a structure with through holes is adopted in the flow path wall 1A (the flow path wall 1A extending in the second direction at the end of the discharge area 4 side of the tenth supply-side connecting tank 3Ka) located at the end of the discharge area 4 side of the supply-side connecting tank. By providing through holes in the flow path wall 1A extending in the second direction at the end of the discharge area 4 side of the supply-side connecting tank, fluid that is difficult to pass through the flow path wall 1A extending in the second direction at the end of the discharge area 4 side of the supply-side connecting tank can be easily discharged.

[0182] If the area of ​​the through hole is large, the fluid may have difficulty flowing from the supply-side connection groove to the discharge-side connection groove through the gas diffusion layer. Therefore, the area of ​​the through hole is preferably 25% to 50% of the area of ​​the flow path wall 1A extending in the second direction at the end of the discharge area 4 of the supply-side connection groove where the through hole is provided, including the area of ​​the through hole, is more preferably 28% to 40% and even more preferably 32% to 36%.

[0183] Figure 15 This is a schematic cross-sectional view showing partition 100. (e.g.) Figure 15 As shown in the schematic diagram, the through hole in the blank part can also be configured on the inner side of the edge of the flow path wall 1A. That is, the through hole does not form a cut-out portion (notch) on the flow path wall 1A.

[0184] Figure 16 This is a schematic cross-sectional view showing partition 100. (e.g.) Figure 16 As shown in the schematic diagram, multiple through holes in the blank area can also be provided on the flow path wall 1A.

[0185] exist Figure 17 In the eleventh tank group 3L shown in the schematic diagram, the following structure is adopted: a flow path wall 1A (a flow path wall 1A extending in the second direction at the end of the discharge area 4 side of the eleventh supply-side connecting tank 3La) is provided at the end of the discharge area side of the eleventh supply-side connecting tank 3La. By branching the flow path wall 1A provided at the end of the discharge area side of the tenth supply-side connecting tank Ka, a through hole is substantially provided on the flow path wall 1A provided at the end of the discharge area 4 side. By branching the flow path wall 1A, fluid that is difficult to pass through the flow path wall 1A extending in the second direction at the end of the discharge area 4 side of the supply-side connecting tank can be easily discharged.

[0186] If the area of ​​the opening of the branch flow path wall 1A is large, the fluid may have difficulty flowing through the gas diffusion layer to the supply-side connection groove and the discharge-side connection groove. Therefore, the area of ​​the opening of the branch flow path wall 1A is preferably 25% to 50% of the area of ​​the supply-side connection groove side of the flow path wall 1A extending in the second direction at the end of the discharge area 4 side of the supply-side connection groove of the branch flow path wall 1A, including the opening, more preferably 28% to 40%, and even more preferably 32% to 36%.

[0187] The partition 100, which employs a structure having a through hole in the flow path wall 1A at the end of the discharge area 4 side of the supply-side connecting groove, or having a branch in the flow path wall 1A at the end of the discharge area 4 side of the supply-side connecting groove, can also adopt one or more of the following structures: the height of the flow path wall 1A at the end of the discharge area 4 side of the supply-side connecting groove is lower than the height H1 of the flow path wall 1A between the supply-side connecting groove and the discharge-side connecting groove; the thickness of the flow path wall 1A at the end of the discharge area 4 side of the supply-side connecting groove is thinner than the thickness of the flow path wall 1A between the supply-side connecting groove and the discharge-side connecting groove; and the end side of the frame 5 at the discharge area 4 side of the supply-side connecting groove is raised so that the depth of the end side of the discharge area 4 side of the supply-side connecting groove is shallower than the depth of the end side of the supply area 2 side of the supply-side connecting groove. Any one or more of the above structures can be combined in any group of grooves, or each of the above structures can be used individually.

[0188] The implementation can also adopt the following structures: a structure in which the height of the flow path wall 1A at the end of the supply area 2 side of the discharge side connecting groove is lower than the height H1 of the flow path wall 1A between the supply side connecting groove and the discharge side connecting groove; a structure in which the thickness of the flow path wall 1A at the end of the supply area 2 side of the discharge side connecting groove is thinner than the thickness of the flow path wall 1A between the supply side connecting groove and the discharge side connecting groove; and a structure in which the flow path wall 1A at the end of the supply area 2 side of the discharge side connecting groove has a through hole or a branch of the flow path wall 1A at the end of the supply area 2 side of the discharge side connecting groove. Figure 15 In the schematic diagram, in the tenth tank group 3K, the eleventh tank group 3L, and the twelfth tank group 3M, the following structure is adopted: the height of the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connecting tank is lower than the height H1 of the flow path wall 1A provided between the supply side connecting tank and the discharge side connecting tank. The above structure of the discharge side connecting tank preferably satisfies the requirements described in the supply side connecting tank.

[0189] The structure in which the height of the flow path wall 1A at the end of the supply area 2 side of the discharge side connection groove is lower than the height H1 of the flow path wall 1A between the supply side connection groove and the discharge side connection groove; the structure in which the thickness of the flow path wall 1A at the end of the supply area 2 side of the discharge side connection groove is thinner than the thickness of the flow path wall 1A between the supply side connection groove and the discharge side connection groove; and the structure in which the flow path wall 1A at the end of the supply area 2 side of the discharge side connection groove has a through hole or a branch of the flow path wall 1A at the end of the supply area 2 side of the discharge side connection groove are preferably adopted in the group of grooves that are close to the discharge port OUT side in the second direction. If the above structure is adopted in the group of grooves that are close to the discharge port OUT side in the second direction, the fluid tends to flow in the groove of the flow path far from the supply port IN, resulting in improved uniformity of fluid flow ease.

[0190] When the first to nth slot groups are arranged from the supply port IN side to the discharge port OUT side in the second direction, in the m1th slot group (m1 is an integer greater than (n / 2)), the following structure is preferably adopted: the height of the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot is lower than the height H1 of the flow path wall 1A provided between the supply side connection slot and the discharge side connection slot; the thickness of the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot is thinner than the thickness of the flow path wall 1A provided between the supply side connection slot and the discharge side connection slot; and the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot has a through hole or a branch of the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot.

[0191] When the first to nth slot groups are arranged from the supply port IN side to the discharge port OUT side in the second direction, in the m2th slot group (m2 is an integer greater than or equal to (n / 1.5)), the following structure is preferably adopted: the height of the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot is lower than the height H1 of the flow path wall 1A provided between the supply side connection slot and the discharge side connection slot; the thickness of the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot is thinner than the thickness of the flow path wall 1A provided between the supply side connection slot and the discharge side connection slot; and the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot has a through hole or a branch of the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot.

[0192] When the first to nth slot groups are arranged from the supply port IN side to the discharge port OUT side in the second direction, in the m3th slot group (m3 is an integer greater than or equal to (n / 1.2)), the following structure is preferably adopted: the height of the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot is lower than the height H1 of the flow path wall 1A provided between the supply side connection slot and the discharge side connection slot; the thickness of the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot is thinner than the thickness of the flow path wall 1A provided between the supply side connection slot and the discharge side connection slot; and the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot has a through hole or a branch of the flow path wall 1A provided at the end of the supply area 2 side of the discharge side connection slot.

[0193] The height of the supply region 2 and the discharge region 4, based on the surface of the frame 5 of the tank region 3, is preferably greater than the depth of the tank in the tank region 3. The supply region 2 and the discharge region 4 are regions with a relatively smaller volume than the tank region 3. From the viewpoint of ensuring high fluid uniformity in each tank of the tank region 3, the height of the supply region 2 and the discharge region 4 is preferably 150% or more, more preferably 200% or more, and even more preferably 350% or more of the depth of the tank in the tank region 3.

[0194] In this implementation, fluid is less likely to accumulate on the discharge area 4 side of the supply-side connection groove, which improves the uniformity of fluid flow.

[0195] (Second Implementation)

[0196] The second embodiment relates to a partition unit. The partition unit has partitions 100, 101, and 102 as in the first embodiment. Figure 17 This is a schematic diagram of the partition unit 200. The partition unit 200 includes a support 11, a partition 100, a supply connection 12, a supply manifold 13, a discharge connection 14, and a discharge manifold 15.

[0197] The support 11 is preferably insulating, for example, made of resin material. A partition 100 is provided on the support 11.

[0198] The supply connection path 12 is disposed between the supply manifold 13 and the supply port IN. The supply connection path 12 is a flow path that connects the supply manifold 13 and the flow path on the supply area 2 side of the partition 100. The supply connection path 12 may also have a groove. The supply connection path 12 may be a protrusion or depression of the support body 11, or it may be composed of a component different from the support body 11.

[0199] The supply manifold 13 is the opening of the baffle unit 200. Fluid is supplied from the supply manifold 13. Other manifolds (not shown) may also be provided in the baffle unit 200.

[0200] The discharge connection 14 is provided between the discharge manifold 15 and the discharge outlet OUT. The discharge connection 14 is a flow path that connects the discharge manifold 15 and the flow path on the discharge area 4 side of the partition 100. The discharge connection 14 may also have a groove. The discharge connection 14 may be a protrusion or depression of the support body 11, or it may be composed of a component different from the support body 11.

[0201] The discharge manifold 15 is the opening of the baffle unit 200. Fluid is discharged from the discharge manifold 15. Other manifolds (not shown) may also be provided in the baffle unit 200.

[0202] If the structure of the embodiment is adopted, the fluid can flow easily and uniformly. By making the fluid flow highly uniform, gas is less likely to accumulate.

[0203] (Third implementation method)

[0204] The third embodiment relates to an electrochemical battery. Figure 18 This is a schematic diagram showing the electrochemical cell 300 according to the third embodiment. The electrochemical cell 300 is, for example, used for water electrolysis, CO2 electrolysis, ammonia electrolysis synthesis, or a fuel cell. When CO2 is used in the electrolysis reaction, the CO2 can be recovered from combustion gases, etc., using an amine solution. The electricity generated by the electrochemical cell can be used for electrolysis, to charge a secondary battery, or consumed by a load. A fuel cell or a solar cell can also be used as the power source for the electrochemical cell. Using an electrochemical cell, for example, it is possible to convert surplus electrical energy into chemical energy and store it.

[0205] The electrochemical cell 300 has an anode 21, a cathode 22, a separator 23, a first separator 24, and a second separator 25.

[0206] The first electrode (anode) 21 has a porous gas diffusion layer or other substrate 21A on the side of the first partition 24 and a catalyst layer 21B on the side of the partition wall 23. The substrate 21A and the catalyst layer 21B of the first electrode 21 use appropriate components according to the anodic reaction of the first electrode 21.

[0207] The second electrode (cathode) 22 has a porous gas diffusion layer or other substrate 22A on the side of the second partition 25 and a catalyst layer 22B on the side of the partition wall 23. The substrate 22A and the catalyst layer 22B of the second electrode 22 use appropriate components according to the cathode reaction of the second electrode 22.

[0208] The partition 23 is disposed between the cathode 22 and the anode 21, and is stacked with the cathode 22 and the anode 21 to form a membrane electrode assembly (MEA). The partition 23 is made of a material that allows ions to move between the anode 21 and the cathode 22, and that can separate the anode 21 and the anode portion on the first partition 24 side from the cathode 22 and the cathode portion on the second partition 25 side. Specifically, it is composed of anion exchange membranes, cation exchange membranes, or porous membranes of organic polymer materials.

[0209] Examples of ion exchange membranes used for the separator 23 include cation exchange membranes such as Nafion and Flemion, and anion exchange membranes such as Neosepta, Selemion, Sustainion, and PiperION. The organic polymeric materials constituting the porous membrane are not particularly limited, and examples include fluorinated resins such as Teflon or polyvinylidene fluoride, hydrocarbon polymers such as polyether, polysulfone, polyethylene, polypropylene, and polyethersulfone, and cellulose.

[0210] The first partition 24 is supplied with fluid for the reaction at the first electrode 21, and the fluid containing reactants is discharged. The first partition 24 is electrically connected to the first electrode 21.

[0211] The second partition 25 is supplied with fluid for the reaction at the second electrode 22, and the fluid containing reactants is discharged. The second partition 25 is electrically connected to the second electrode 22.

[0212] The partition 100 of the first embodiment or the partition unit 200 of the second embodiment is preferably used for the first partition 24 and / or the second partition 25.

[0213] By using the partition 100 of the first embodiment or the partition unit 200 of the second embodiment, gas is difficult to accumulate in the partition 100, and the deterioration of the partition wall 23 can be suppressed.

[0214] (Fourth Implementation)

[0215] The fourth embodiment involves a fuel cell stack. Figure 19 This is a schematic cross-sectional view showing the fuel cell stack 400 of the fourth embodiment. Figure 19 The fuel cell stack 400 shown in the fourth embodiment is formed by connecting multiple electrochemical cells 300 in series. Fastening plates 31 and 32 are installed at both ends of the fuel cell stack 400. In the fourth embodiment, a modified electrochemical cell may also be used.

[0216] When electrolysis is performed, the amount of carbon compounds such as H2 and CO generated in an electrochemical cell 300 is relatively small. When generating electricity, the amount of electricity generated in an electrochemical cell 300 is relatively small. Therefore, when a stack 400 is constructed by connecting multiple electrochemical cells 300 in series, the products and the amount of electricity generated increase.

[0217] (Fifth Implementation)

[0218] The fifth embodiment relates to an electrolysis apparatus and a fuel cell. The electrolysis apparatus and the fuel cell use an electrochemical cell 300 or a fuel cell stack 400 using an electrochemical cell 300. Figure 20 This is a schematic diagram illustrating the apparatus 500 according to the fourth embodiment. The apparatus 500 uses an electrochemical cell 300. A portion of the actual apparatus structure is shown in the diagram. When CO2 is electrolyzed in the electrochemical cell 300, the CO2 electrolyzed in the electrochemical cell 300 may also be CO2 gas recovered from combustion gases, etc., using an amine solution or the like.

[0219] The device 500 includes an electrochemical cell 300, an anode current collector 41, a cathode current collector 42, and a power source or load 43.

[0220] An anode current collector 41 is disposed on the first separator 24 of the electrochemical cell 300. The first separator 24 is electrically connected to the anode current collector 41.

[0221] A cathode current collector 42 is disposed on the second separator 25 of the electrochemical cell 300. The second separator 25 is electrically connected to the cathode current collector 42.

[0222] The partition 100 of the first embodiment or the partition unit 200 of the second embodiment is preferably used for the first partition 24 and / or the second partition 25.

[0223] A power source or load 43 is connected between the anode current collector 41 and the cathode current collector 42.

[0224] If device 500 is an electrolysis device, a power supply 43 is connected between the anode current collector 41 and the cathode current collector 42.

[0225] If device 500 is a fuel cell, a load 43 is connected between the anode current collector 41 and the cathode current collector 42. The load 43 can also be a power conversion device, a battery, etc.

[0226] The present invention will now be described in more detail with reference to embodiments, but the present invention is not limited to the following embodiments.

[0227] (Example 1)

[0228] Will Figure 1The separator 100 is used for the first separator 24 and the second separator 25 to make an electrochemical cell equivalent to Figure 25.

[0229] (Example 2)

[0230] Will Figure 1 The separator 100 is used for the first separator 24 to make an electrochemical cell equivalent to Figure 25.

[0231] (Comparative Example 1)

[0232] Will Figure 1 The supply-side connecting groove, branch groove and discharge-side connecting groove have the same depth and cross-sectional area as the first separator 24 and the second separator 25 to make an electrochemical cell equivalent to Figure 25.

[0233] Electrochemical cells from Examples 1-2 and Comparative Example 1 were used to perform electrolytic operation to generate CO from CO2 under the same conditions. Compared with Comparative Example 1, gases were less likely to accumulate in the separator in Examples 1-2, and the rise in battery voltage was suppressed even after long-term operation.

[0234] The electrochemical cells of Examples 1-2 and Comparative Example 1 were used to operate a fuel cell using methanol as fuel under the same conditions. Compared with Comparative Example 1, gases were less likely to accumulate in the separator in Examples 1-2, and the decrease in cell voltage was suppressed even after long-term operation.

[0235] The technical solutions for the implementation methods are described below.

[0236] Technical Solution 1

[0237] A partition, wherein the partition has:

[0238] Framework; and

[0239] A flow path wall is provided, which divides the frame into a supply area, a discharge area, and a groove area. The groove area includes a first groove group between the supply area and the discharge area. The first groove group includes a first supply-side connecting groove with a larger opening on the supply area side than on the discharge area side, and a first discharge-side connecting groove with a larger opening on the discharge area side than on the supply area side.

[0240] The flow path wall is provided between the first supply-side connecting groove and the first discharge-side connecting groove, and at the end of the first supply-side connecting groove on the discharge area side.

[0241] The height of the flow path wall at the end of the first supply-side connecting groove on the discharge area side is lower than the height of the flow path wall between the first supply-side connecting groove and the first discharge-side connecting groove; the thickness of the flow path wall at the end of the first supply-side connecting groove on the discharge area side is thinner than the thickness of the flow path wall between the first supply-side connecting groove and the first discharge-side connecting groove; the end side of the first supply-side connecting groove on the discharge area side of the frame is raised, so that the depth of the end side of the first supply-side connecting groove on the discharge area side is shallower than the depth of the end side of the first supply-side connecting groove on the supply area side; a through hole is provided on the flow path wall at the end of the first supply-side connecting groove on the discharge area side; or the flow path wall is branched at the end of the first supply-side connecting groove on the discharge area side.

[0242] Technical Solution 2

[0243] In the partition described in technical solution 1

[0244] The supply area, the tank area, and the discharge area are arranged in a first direction.

[0245] The first direction is the length direction of the first supply-side connecting groove and the second discharge-side connecting groove.

[0246] The groove region includes a second group of grooves.

[0247] The first and second slot groups are arranged in a second direction perpendicular to the first direction.

[0248] Technical Solution 3

[0249] In the partition described in technical solution 1 or 2

[0250] The height of the flow path wall at the end of the first supply-side connecting groove on the discharge area side is lower than the height of the flow path wall between the first supply-side connecting groove and the first discharge-side connecting groove.

[0251] Technical Solution 4

[0252] In the partition described in technical solution 1 or 2

[0253] The thickness of the flow path wall disposed at the end of the first supply-side connecting groove on the discharge area side is thinner than the thickness of the flow path wall disposed between the first supply-side connecting groove and the first discharge-side connecting groove.

[0254] Technical Solution 5

[0255] In the partition described in technical solution 1 or 2

[0256] The end side of the first supply-side connecting groove of the frame on the discharge area side is raised so that the depth of the end side of the first supply-side connecting groove on the discharge area side is shallower than the depth of the end side of the first supply-side connecting groove on the supply area side.

[0257] Technical Solution 6

[0258] In the partition described in technical solution 1 or 2

[0259] The flow path wall at the end of the discharge area side of the first supply side connecting groove has a through hole.

[0260] Technical Solution 7

[0261] In the partition described in technical solution 1 or 2

[0262] The flow path wall branch is provided at the end of the discharge area side of the first supply side connecting groove.

[0263] Technical Solution 8

[0264] In any of the partitions described in technical solutions 1 to 3

[0265] The height of the flow path wall provided at the end of the discharge area side of the first supply side connecting groove is the height of the lowest part of the flow path wall 1A extending along the second direction at the end of the discharge area side of the first supply side connecting groove.

[0266] Technical Solution 9

[0267] In the partition described in technical solution 8

[0268] The difference between the height of the flow path wall provided at the end of the discharge area side of the first supply side connecting groove and the height of the flow path wall provided between the first supply side connecting groove and the first discharge side connecting groove is 100 [μm] or more and 1000 [μm] or less.

[0269] Technical Solution 10

[0270] In the partition described in technical solution 8 or 9

[0271] The difference between the height of the flow path wall disposed at the end of the discharge area side of the first supply side connecting groove and the height of the flow path wall disposed between the first supply side connecting groove and the first discharge side connecting groove is more than 20% and less than 82% of the height of the flow path wall disposed between the first supply side connecting groove and the first discharge side connecting groove.

[0272] Technical Solution 11

[0273] In the partition described in technical solutions 1, 2, or 4

[0274] The thickness of the flow path wall at the end of the discharge area side of the first supply-side connecting groove is more than 10% and less than 50% of the thickness of the flow path wall disposed between the first supply-side connecting groove and the first discharge-side connecting groove.

[0275] Technical Solution 12

[0276] In the partition described in technical solution 2

[0277] The volume per unit length of the channel extending from the discharge area side of the first supply-side connecting channel towards the center to 5% of the length of the first supply-side connecting channel in the first direction is 10% to 50% of the volume per unit length of the first supply-side connecting channel, excluding the portions extending from the supply area side of the first supply-side connecting channel towards the center to 5% of the length of the first supply-side connecting channel and the portions extending from the discharge area side of the first supply-side connecting channel towards the center to 5% of the length of the first supply-side connecting channel.

[0278] The raised portion is in direct contact with the flow path wall extending in the second direction at the end of the discharge area side of the first supply-side connecting groove.

[0279] Technical Solution 13

[0280] In the partition described in technical solution 2

[0281] The area of ​​the through hole is more than 25% and less than 50% of the area of ​​the flow path wall extending in the second direction from the end of the discharge area side of the first supply side connecting groove where the through hole is provided, including the through hole.

[0282] Technical Solution 14

[0283] In the partition described in technical solution 2

[0284] The area of ​​the opening of the flow path wall branch is more than 25% and less than 50% of the area of ​​the flow path wall extending in the second direction along the first supply side connection groove side of the first supply side connection groove of the flow path wall branch, which also includes the opening.

[0285] Technical Solution 15

[0286] In any of the partitions described in technical solutions 1 to 14

[0287] Ribs are provided in the supply area and / or discharge area.

[0288] Technical Solution 16

[0289] In any of the partitions described in technical solutions 1 to 15

[0290] The supply area, the trough area, and the discharge area are all opened on the side opposite to the frame side.

[0291] Technical Solution 17

[0292] An electrochemical battery, wherein the electrochemical battery comprises:

[0293] A first electrode, the first electrode comprising a substrate;

[0294] The second electrode includes a substrate;

[0295] A partition wall located between the first electrode and the second electrode;

[0296] A first partition, the first partition being in contact with the first electrode; and

[0297] The second partition is in contact with the second electrode.

[0298] The first partition and / or the second partition are the partitions described in any of technical solutions 1 to 16.

[0299] Technical Solution 18

[0300] In the electrochemical battery described in technical solution 17

[0301] The first partition is connected to the substrate of the first electrode.

[0302] The second partition is connected to the substrate of the second electrode.

[0303] Technical Solution 19

[0304] An electric stack, wherein the electric stack has the electrochemical cell described in technical solution 17 or 18.

[0305] Technical Solution 20

[0306] An apparatus, wherein the apparatus is an electrolysis device or a fuel cell having the electrochemical cell described in technical solution 17 or 18.

[0307] While several embodiments of the present invention have been described, these embodiments are provided by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope and spirit of the invention, and are included within the scope of the invention as described in the claims and its equivalents.

[0308] [Reference to related applications]

[0309] This application is based on Japanese Patent Application 2025-046098 (filed on March 19, 2025) and enjoys priority of that application. This application incorporates the entire contents of that application by reference.

Claims

1. A partition, wherein, The partition has: frame; as well as A flow path wall is provided, which divides the frame into a supply area, a discharge area, and a groove area. The groove area includes a first groove group between the supply area and the discharge area. The first groove group includes a first supply-side connecting groove with a larger opening on the supply area side than on the discharge area side, and a first discharge-side connecting groove with a larger opening on the discharge area side than on the supply area side. The flow path wall is provided between the first supply-side connecting groove and the first discharge-side connecting groove, and at the end of the first supply-side connecting groove on the discharge area side. The height of the flow path wall at the end of the first supply-side connecting groove on the discharge area side is lower than the height of the flow path wall between the first supply-side connecting groove and the first discharge-side connecting groove; the thickness of the flow path wall at the end of the first supply-side connecting groove on the discharge area side is thinner than the thickness of the flow path wall between the first supply-side connecting groove and the first discharge-side connecting groove; the end side of the first supply-side connecting groove on the discharge area side of the frame is raised, so that the depth of the end side of the first supply-side connecting groove on the discharge area side is shallower than the depth of the end side of the first supply-side connecting groove on the supply area side. The flow path wall has a through hole at the end of the first supply side connecting groove on the discharge area side; or the flow path wall has a branch at the end of the first supply side connecting groove on the discharge area side.

2. The partition as claimed in claim 1, wherein, The supply area, the trough area, and the discharge area are arranged in a first direction. The first direction is the length direction of the first supply-side connecting groove and the first discharge-side connecting groove. The groove region includes a second group of grooves. The first and second slot groups are arranged in a second direction perpendicular to the first direction.

3. The partition as described in claim 1 or 2, wherein, The height of the flow path wall at the end of the first supply-side connecting groove on the discharge area side is lower than the height of the flow path wall between the first supply-side connecting groove and the first discharge-side connecting groove.

4. The partition as described in claim 1 or 2, wherein, The thickness of the flow path wall disposed at the end of the first supply-side connecting groove on the discharge area side is thinner than the thickness of the flow path wall disposed between the first supply-side connecting groove and the first discharge-side connecting groove.

5. The partition as described in claim 1 or 2, wherein, The end side of the first supply-side connecting groove of the frame on the discharge area side is raised so that the depth of the end side of the first supply-side connecting groove on the discharge area side is shallower than the depth of the end side of the first supply-side connecting groove on the supply area side.

6. The partition as claimed in claim 1 or 2, wherein, The flow path wall at the end of the discharge area side of the first supply side connecting groove has a through hole.

7. The partition as claimed in claim 1 or 2, wherein, The flow path wall branch is provided at the end of the discharge area side of the first supply side connecting groove.

8. The partition as described in any one of claims 1 to 3, wherein, The height of the flow path wall provided at the end of the discharge area side of the first supply side connecting groove is the height of the lowest part of the flow path wall extending along the second direction at the end of the discharge area side of the first supply side connecting groove.

9. The partition as claimed in claim 8, wherein, The difference between the height of the flow path wall provided at the end of the discharge area side of the first supply side connecting groove and the height of the flow path wall provided between the first supply side connecting groove and the first discharge side connecting groove is 100 [μm] or more and 1000 [μm] or less.

10. The partition as claimed in claim 9, wherein, The difference between the height of the flow path wall disposed at the end of the discharge area side of the first supply side connecting groove and the height of the flow path wall disposed between the first supply side connecting groove and the first discharge side connecting groove is more than 20% and less than 82% of the height of the flow path wall disposed between the first supply side connecting groove and the first discharge side connecting groove.

11. The partition as claimed in claim 4, wherein, The thickness of the flow path wall at the end of the discharge area side of the first supply-side connecting groove is more than 10% and less than 50% of the thickness of the flow path wall disposed between the first supply-side connecting groove and the first discharge-side connecting groove.

12. The partition as claimed in claim 2, wherein, The volume per unit length of the channel extending from the discharge area side of the first supply-side connecting channel towards the center to 5% of the length of the first supply-side connecting channel in the first direction is 10% to 50% of the volume per unit length of the first supply-side connecting channel, excluding the portions extending from the supply area side of the first supply-side connecting channel towards the center to 5% of the length of the first supply-side connecting channel and from the discharge area side of the first supply-side connecting channel towards the center to 5% of the length of the first supply-side connecting channel. The raised portion is in direct contact with the flow path wall extending in the second direction at the end of the discharge area side of the first supply-side connecting groove.

13. The partition as claimed in claim 2, wherein, The area of ​​the through hole is more than 25% and less than 50% of the area of ​​the flow path wall extending in the second direction from the end of the discharge area side of the first supply side connecting groove where the through hole is provided, including the through hole.

14. The partition as claimed in claim 2, wherein, The area of ​​the opening of the flow path wall branch is more than 25% and less than 50% of the area of ​​the flow path wall extending in the second direction along the first supply side connection groove side of the first supply side connection groove of the flow path wall branch, which also includes the opening.

15. The partition as claimed in claim 1, wherein, Ribs are provided in the supply area and / or discharge area.

16. The partition as claimed in claim 1, wherein, The supply area, the trough area, and the discharge area are all opened on the side opposite to the frame side.

17. An electrochemical battery, wherein, The electrochemical cell has the following features: A first electrode, the first electrode comprising a substrate; A second electrode, the second electrode comprising a substrate; A partition wall located between the first electrode and the second electrode; A first partition, which is in contact with the first electrode; as well as The second partition is in contact with the second electrode. The first partition and / or the second partition are the partitions as described in claim 1.

18. The electrochemical cell of claim 17, wherein, The first partition is connected to the substrate of the first electrode. The second partition is connected to the substrate of the second electrode.

19. A fuel cell stack, wherein, The stack has the electrochemical cell of claim 17.

20. An apparatus wherein, The device is an electrolysis device or a fuel cell having the electrochemical cell of claim 17.

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