battery stack

Abstract

The present invention discloses a battery stack, which has an intake manifold and an air flow channel connected to the intake manifold. A guide vane assembly is provided inside the intake manifold, and the guide vane assembly includes a plurality of guide vanes. A guide vane is provided at the air inlet of each air flow channel. The guide vane is provided at a position at the air inlet away from the intake end of the intake manifold, and the free end of the guide vane is close to the side of the intake manifold away from the air inlet. Through the above arrangement, one side of the guide vane faces the intake end of the intake manifold, and the free end of the guide vane extends to the middle of the intake manifold or even beyond the middle of the intake manifold, so that the guide vane can contact more flowing gas in the intake manifold and slow down the flowing gas, making it easier for the gas to enter the corresponding air flow channel, thereby improving the efficiency of the gas in the intake manifold entering the single battery.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a battery stack. Background Art

[0002] Fuel cells are one of the new energy products with development potential. Their working principle is to generate electricity by injecting gas fuel into the battery stack to produce electrochemical reactions.

[0003] A fuel cell stack consists of a membrane electrode assembly and cathode plates and anode plates on both sides, wherein the cathode plate-membrane electrode assembly-anode plate are stacked to form a single cell, and multiple single cells are stacked to form a fuel cell stack.

[0004] The intake manifold is a passage formed by the through-holes on multiple plates when they are stacked in a fuel cell stack, used to introduce reactant gases. The air inlet of the upper gas channel of the single cell is set on the inner wall of the through-hole.

[0005] Among them, the flow direction of the air flow in the intake manifold is perpendicular to the direction of the air inlet of the single cell. The gas tends to flow through the air inlet of the single cell along the length direction of the intake manifold. Therefore, it is difficult for the air flow in the intake manifold to enter the gas channel of the single cell, resulting in low reaction efficiency of the fuel cell. Summary of the Invention

[0006] The main purpose of the embodiments of the present invention is to provide a battery stack, aiming to improve the technical problem in the prior art of low efficiency of the gas passages through which the airflow in the intake manifold of the battery stack flows into the single cells.

[0007] An embodiment of the present invention proposes a battery stack, which is a stacking structure formed by stacking multiple single cells. The through holes on the multiple stacked single cells form an intake manifold for introducing reaction gas after stacking, and each single cell has an air flow channel connected to the intake manifold, and the direction of the air inlet of the air flow channel intersects with the length direction of the intake manifold; a guide vane assembly is provided inside the intake manifold, and the guide vane assembly includes multiple guide vanes, and a guide vane is provided at the air inlet of each air flow channel, and the guide vane is provided at a position at the air inlet away from the air inlet end of the intake manifold, and the free end of the guide vane is close to the side of the intake manifold away from the air inlet.

[0008] In some embodiments of the present invention, the air flow channel includes a main body and an air intake portion connected to one end of the main body, the air inlet is located in the air intake portion, and the air intake portion is connected to the intake manifold;

[0009] The air inlet portion includes a single cell body and a gasket covering the single cell body, wherein the gasket is spaced apart from the surface of the single cell to form the air inlet portion through which gas can flow;

[0010] The guide plate is connected to the gasket.

[0011] In some embodiments of the present invention, the guide plate and the gasket are integrally provided.

[0012] In some embodiments of the present invention, the guide plate assembly includes a first guide plate, a second guide plate, and a third guide plate, wherein the first guide plate, the second guide plate, and the third guide plate are respectively provided on three adjacent single batteries;

[0013] The first guide vane is located on a side of the second guide vane close to the intake end of the intake manifold, and the third guide vane is located on a side of the second guide vane away from the intake end of the intake manifold;

[0014] The free end of the first guide vane is spaced from the side of the intake manifold away from the air flow channel by a first distance, the free end of the second guide vane is spaced from the side of the intake manifold away from the air flow channel by a second distance, and the free end of the third guide vane is spaced from the side of the intake manifold away from the air flow channel by a third distance;

[0015] The first spacing is greater than the second spacing, and the second spacing is greater than the third spacing; or

[0016] The first interval is equal to the second interval, and the second interval is equal to the third interval.

[0017] In some embodiments of the present invention, the first guide vane, the second guide vane, and the third guide vane are all arranged at an angle, and the free ends of the first guide vane, the second guide vane, and the third guide vane are all arranged toward the intake end of the intake manifold.

[0018] In some embodiments of the present invention, the angle between the first guide vane and the central axis of the intake manifold is a first angle, the angle between the second guide vane and the central axis of the intake manifold is a second angle, and the angle between the third guide vane and the central axis of the intake manifold is a third angle. The first angle, the second angle, and the third angle are all greater than 0° and less than 90°.

[0019] In some embodiments of the present invention, the first angle is smaller than the second angle, and the second angle is smaller than the third angle.

[0020] In some embodiments of the present invention, the first guide vane, the second guide vane, and the third guide vane are parallel to each other.

[0021] In some embodiments of the present invention, the first guide vane, the second guide vane, and the third guide vane are all perpendicular to the central axis of the intake manifold.

[0022] In some embodiments of the present invention, a projection of the first guide vane along the length direction of the intake manifold on a first plane is a first projection, a projection of the second guide vane along the length direction of the intake manifold on the first plane is a second projection, and a projection of the third guide vane along the length direction of the intake manifold on the first plane is a third projection, and the first plane is perpendicular to the length direction of the intake manifold;

[0023] The first projection, the second projection, and the third projection are spaced apart from each other in the first plane.

[0024] An embodiment of the present invention proposes a battery stack, wherein a guide vane assembly consisting of multiple guide vanes is disposed within the intake manifold of the battery stack, a guide vane is disposed at the inlet of the airflow channel of each single cell, and the guide vane is disposed at a position where the air inlet of the airflow channel is away from the air inlet end of the intake manifold, and the free end of the guide vane is positioned close to the side of the intake manifold away from the air inlet. Through the above arrangement, one side of the guide vane faces the air inlet end of the intake manifold, and the free end of the guide vane extends to the middle of the intake manifold or even beyond the middle of the intake manifold, allowing the guide vane to contact more flowing gas in the intake manifold and slowing the flowing gas, making it easier for the gas to enter the corresponding airflow channel, thereby improving the efficiency of the gas in the intake manifold entering the single cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is a schematic structural diagram of a battery stack according to a first embodiment of the present invention;

[0027] Figure 2 This is a schematic structural diagram of a battery stack according to a second embodiment of the present invention;

[0028] Figure 3 This is a schematic structural diagram of a battery stack according to a third embodiment of the present invention;

[0029] Figure 4 A schematic structural diagram of a single cell of the prior art of the present invention;

[0030] Figure 5 Schematic diagram of a top view of a single cell according to an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of the side structure of a single cell according to an embodiment of the present invention;

[0032] Figure 7 Schematic diagram of the angular relationship between the guide vane and the central axis of the intake manifold in an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 100. Cell; 101. Airflow channel; 101-1. Air inlet; 101-2. Main body; 102. Air inlet; 200. Intake manifold; 300. Guide vane; 301. First guide vane; 302. Second guide vane; 303. Third guide vane; 400. Gasket; 401. Through hole; 500. Ridge; A. First angle; B. Second angle; C. Third angle. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] like Figure 1 、 Figure 2 、 Figure 3 As shown, the present invention provides a battery stack, which is a stacking structure formed by stacking multiple single cells 100. The through holes on the multiple stacked single cells 100 form an intake manifold 200 for introducing reaction gas after stacking. Each single cell 100 has an air flow channel 101 connected to the intake manifold 200. The direction of the air inlet 102 of the air flow channel 101 intersects with the length direction of the intake manifold 200. A guide vane assembly is provided inside the intake manifold 200. The guide vane assembly includes multiple guide vanes 300. A guide vane 300 is provided at the air inlet 102 of each air flow channel 101. The guide vane 300 is provided at a position at the air inlet 102 away from the air inlet end of the intake manifold 200, and the free end of the guide vane 300 is close to the side of the intake manifold 200 away from the air inlet 102.

[0040] It should be noted that “the free end of the guide plate 300 is close to the side of the intake manifold 200 away from the air inlet 102” in the technical solution described in this application means that the distance between the free end of the guide plate 300 and the side of the intake manifold 200 away from the air inlet 102 is less than the distance between the end of the guide plate connected to the single cell 100 and the side of the intake manifold 200 away from the air inlet 102. In the case where "the free end of the guide plate 300 is close to the side of the intake manifold 200 away from the air inlet 102", the portion of the guide plate 300 with a sheet structure is in the middle of the intake manifold 200 or close to the middle of the intake manifold 200, or even exceeds the middle of the intake manifold 200. Therefore, the guide plate 300 can contact more flowing gas in the intake manifold 200, and then slow down the flowing gas it contacts, preventing it from flowing quickly through the air flow channel 101 of the single cell 100, so that the flowing gas in the intake manifold 200 can have sufficient time to flow into the air flow channel 101 of the single cell 100, thereby improving the efficiency of the flowing gas in the intake manifold 200 entering the air flow channel 101 of the single cell 100.

[0041] It should be noted that "the guide vane 300 is arranged at a position at the air intake 102 away from the air intake end of the intake manifold 200", that is, the air intake 102 has a first end close to the air intake end of the intake manifold 200 and a second section away from the air intake end of the intake manifold 200, and the guide vane is arranged at the second end.

[0042] It can be understood that by arranging a guide plate assembly consisting of multiple guide plates 300 in the intake manifold 200 of the fuel cell stack, a guide plate 300 is arranged at the inlet of the air flow channel 101 of each single cell 100, and the guide plate 300 is arranged at a position where the air inlet 102 of the air flow channel 101 is away from the air intake end of the intake manifold 200, and the free end of the guide plate 300 is close to the central axis of the intake manifold 200, one side of the guide plate 300 faces the air intake end of the intake manifold 200, and the free end of the guide plate 300 extends to the middle of the intake manifold 200, so that the guide plate 300 can be exposed to more flowing gas in the intake manifold 200, and the flowing gas is slowed down, making it easier for the gas to enter the corresponding air flow channel 101, thereby improving the efficiency of the gas in the intake manifold 200 entering the single cell 100.

[0043] like Figure 1 or Figure 2As shown, in some embodiments, the guide plate 300 has a planar structure, with the plane of the guide plate 300 facing the intake end of the intake manifold 200. The plane of the planar structure can block the gas flowing along the length of the intake manifold 200 in the intake manifold 200 when the guide plate 300 is at any angle to the central axis of the intake manifold 200, thereby reducing the speed of the airflow at the air inlet 102 of the airflow channel 101 of the single cell 100, thereby facilitating the gas to enter the airflow channel 101 of the single cell 100.

[0044] like Figure 3 As shown, in some embodiments, the guide plate 300 is a curved sheet-like structure, with the curved surface of the guide plate 300 facing the intake end of the intake manifold 200. Generally, the curved guide plate is curved as a whole toward the intake end of the intake manifold 200. Because the guide plate 300 is a sloped diversion structure, the airflow impinging on the guide plate follows the slope (curved surface) of the guide plate 300 and enters the airflow channel 101 on the single cell 100, thereby improving the efficiency of the flowing gas in the intake manifold 200 entering the single cell 100.

[0045] like Figure 2 、 Figure 3 As shown, in some embodiments, the airflow channel 101 includes a main body 101-2 and an air intake portion 101-1 connected to one end of the main body 101-2. The air intake port 102 is located in the air intake portion 101-1. The air intake portion 101-1 is connected to the intake manifold 200, that is, the airflow in the intake manifold 200 can enter the air intake portion 101-1 through the air intake port 102. The air intake portion 101-1 is connected to the main body 101-2, that is, the airflow in the intake manifold 200 can enter the main body 101-2 through the air intake port. The air intake portion 101-1 includes a single cell 100 body and a gasket 400 covering the single cell 100 body. The gasket 400 is spaced apart from the surface of the single cell 100 to form the air intake portion 101-1 through which gas can flow. The guide plate is connected to the gasket 400.

[0046] like Figure 4 、 Figure 5 as well as Figure 6As shown, during the stamping process of the electrode plates constituting the single cell 100, there is a ridge 500 that is not stamped between the preset through holes in the electrode plates and the main body 101-2. The ridge 500 will block the air intake end of the main body 101-2, resulting in the air flow in the intake manifold 200 being unable to smoothly enter the main body 101-2. For this reason, a gasket 400 is specially provided between the through hole and the main body. The gasket 400 is covered on the surface of the single cell 100 and is spaced apart from the surface of the single cell 100. That is, at least most of the gasket 400 has a distance from the ridge 500, so as to form an air intake portion 101-1 with a gas flow space between the intake manifold 200 and the surface of the single cell 100.

[0047] In some embodiments, the gasket 400 is provided with a plurality of through holes 401 spaced apart along the length direction of the gasket, wherein the through holes 401 correspond to the ridges 500 on the plate, so that there is a space between the ridges 500 and the gasket 400 for airflow.

[0048] Since the ridge 500 is raised relative to the surface of the electrode plate, the distance between the gasket 400 and the electrode plate is too small, which will cause the airflow to be unable to smoothly pass over the ridge 500. In order to ensure that the airflow can smoothly pass over the ridge 500, the opening length of the through hole 401 on the gasket 400 is greater than the length of the ridge 500, so that there is enough space between the ridge 500 and the gasket 400 for airflow to circulate.

[0049] Therefore, by connecting the guide plate 300 to the gasket 400 , the guide plate 300 can be used to guide the airflow in the intake manifold 200 into the intake portion 101 - 1 , and then enter the main body 101 - 2 through the intake portion 101 - 1 .

[0050] In some embodiments, the guide plate 300 and the gasket 400 are integrally provided.

[0051] It should be noted that the above-mentioned integrated setting can be that the gasket 400 and the guide plate 300 are an integrated structure, or part of the gasket 400 extends toward the other side of the intake manifold to form the guide plate 300, that is, the gasket 400 is divided into two parts, one part is spaced apart from the surface of the single cell to form the intake part 101-1, and the other part extends to the other side of the intake manifold 200 to form a guide plate structure.

[0052] In some embodiments, the portion of the gasket 400 extending toward the other side of the intake manifold 200 is bent to form a guide vane structure having an arc surface, and the slope of the arc surface can accelerate the airflow into the intake portion 101 - 1 .

[0053] In some embodiments, the guide vane assembly includes a first guide vane 301, a second guide vane 302, and a third guide vane 303. The first guide vane 301, the second guide vane 302, and the third guide vane 303 are respectively disposed on three adjacent single battery cells 100. The free end of the first guide vane 301 is spaced apart from the side of the intake manifold 200 away from the airflow channel 101 by a first distance, the free end of the second guide vane 302 is spaced apart from the side of the intake manifold 200 away from the airflow channel 101 by a second distance, and the free end of the third guide vane is spaced apart from the side of the intake manifold 200 away from the airflow channel 101 by a third distance. The first distance is greater than the second distance, and the second distance is greater than the third distance.

[0054] It should be noted that the first guide vane 301 is located on the side of the second guide vane 302 close to the intake end of the intake manifold 200, and the third guide vane 303 is located on the side of the second guide vane 302 away from the intake end of the intake manifold 200. This means that the first guide vane 301 contacts the flowing gas in the intake manifold 200 before the second guide vane 302, and the second guide vane 302 contacts the flowing gas in the intake manifold 200 before the third guide vane 303. When the first spacing is greater than the second spacing, it can be understood that the length of the first guide plate 301 in the direction perpendicular to the central axis of the intake manifold 200 is shorter than the length of the second guide plate 302 in the direction perpendicular to the central axis of the intake manifold 200. Therefore, it can be ensured that the first guide plate 301 does not completely cover the second guide plate 302, so that the second guide plate 302 can contact the flowing air in the intake manifold 200, so that the second guide plate 302 can also guide the flowing air in the intake manifold 200 into its corresponding air flow channel 101; similarly, When the second spacing is greater than the third spacing, it can be understood that the length of the second guide vane 302 in the direction perpendicular to the central axis of the intake manifold 200 is shorter than the length of the third guide vane 303 in the direction perpendicular to the central axis of the intake manifold 200. Therefore, it can be ensured that the second guide vane 302 will not completely cover the third guide vane 303, so that the third guide vane 303 can contact the flowing gas in the intake manifold 200, so that the third guide vane 303 can also guide the flow channel airflow in the intake manifold 200 into its corresponding airflow channel 101.

[0055] In some embodiments, the guide vane assembly in the above-described solution still includes the first guide vane 301, the second guide vane 302, and the third guide vane 303. The positions of the first guide vane 301, the second guide vane 302, and the third guide vane 303 are consistent with those in the above-described solution. The first spacing is equal to the second spacing, and the second spacing is equal to the third spacing. That is, the length of the first guide vane 301 in a direction perpendicular to the central axis of the intake manifold 200, the length of the second guide vane 302 in a direction perpendicular to the central axis of the intake manifold 200, and the length of the third guide vane 303 in a direction perpendicular to the central axis of the intake manifold 200 are equal.

[0056] In some embodiments, the first guide vane 301 , the second guide vane 302 , and the third guide vane 303 are all arranged at an angle, and the free ends of the first guide vane 301 , the second guide vane 302 , and the third guide vane 303 are all arranged toward the intake end of the intake manifold 200 .

[0057] It should be noted that the first guide vane 301, the second guide vane 302, and the third guide vane 303 can be a planar structure or a curved structure. When the first guide vane 301, the second guide vane 302, and the third guide vane 303 are a planar structure, the three are arranged at an angle, and the first guide vane 301, the second guide vane 302, and the third guide vane 303 form an angle with the central axis of the intake manifold 200. This angle makes the flow direction of the flowing gas in the intake manifold 200 and the incident angle of the surface of the guide vane less than 90°, thereby reducing the obstruction of the flowing gas in the intake manifold 200 by the guide vane. At the same time, the surface of the inclined guide vane is also a guide surface with a certain slope when it is inclined. The combination of the two enables the flowing gas to enter the air flow channel 101 of the single cell 100 along the surface of the guide vane while retaining most of the flow velocity of the flowing gas.

[0058] like Figure 2 、 Figure 7 As shown in some embodiments, the angle between the first guide vane 301 and the central axis of the intake manifold 200 is a first angle, the angle between the second guide vane 302 and the central axis of the intake manifold 200 is a second angle, and the angle between the third guide vane 303 and the central axis of the intake manifold 200 is a third angle. The first angle A, the second angle B, and the third angle C are all greater than 0° and less than 90°.

[0059] It should be noted that the first angle A, the second angle B, and the third angle C are respectively the angles between the sides of the first guide vane 301 , the second guide vane 302 , and the third guide vane 303 facing away from the intake end of the intake manifold 200 and the central axis of the intake manifold 200 .

[0060] It is understood that the first guide vane 301, the second guide vane 302, and the third guide vane 303 can be either planar or curved. When the first guide vane 301, the second guide vane 302, and the third guide vane 303 are planar, the first angle A, the second angle B, and the third angle C are all angles between the plane of the guide vane and the central axis of the intake manifold 200. When the first guide vane 301, the second guide vane 302, and the third guide vane 303 are curved, the first angle A, the second angle B, and the third angle C are all angles between the tangent line of the midpoint of the surface of the first guide vane 301, the second guide vane 302, and the third guide vane 303 facing away from the intake end of the intake manifold 200 and the central axis of the intake manifold 200.

[0061] In some embodiments, the first angle A is greater than the second angle B, and the second angle B is greater than the third angle C.

[0062] It should be noted that when the first guide vane 301, the second guide vane 302, and the third guide vane 303 are all planar structures, the first angle A is greater than the second angle B, and the second angle B is greater than the third angle C, the slope formed by the first guide vane 301 is smaller than the slope formed by the second guide vane 302. Therefore, even if the first guide vane 301 partially blocks the second guide vane 302, and the first guide vane 301 reduces the airflow passing through the first guide vane 301 to the second guide vane 302 to a certain extent, the second guide vane 303 The slope of the second guide plate 302 is greater than that of the first guide plate 301, which makes the gas flow rate on the second guide plate 302 greater than that on the first guide plate 301, thereby ensuring that the flowing gas on the second guide plate 302 can enter the single battery 100 corresponding to the second guide plate 302 at a faster flow rate. Similarly, the second included angle is greater than the third included angle, and the slope formed by the second guide plate 302 is smaller than the slope formed by the third guide plate 303, which makes the gas flow rate on the third guide plate 303 greater than that on the second guide plate 302. This ensures that the flowing gas on the third guide plate 303 can enter the single battery 100 corresponding to the third guide plate 303 at a faster flow rate.

[0063] In some embodiments, the first guide plate 301 , the second guide plate 302 , and the third guide plate 303 are all arc-surface structures, the first angle A is greater than the second angle B, and the second angle B is greater than the third angle C.

[0064] It is understood that when the first guide vane 301, the second guide vane 302, and the third guide vane 303 have curved surface structures, if the first angle A is greater than the second angle B, this means that the slope at the midpoint of the first guide vane 301 is smaller than the slope at the midpoint of the second guide vane 302. If the second angle B is greater than the third angle C, this means that the slope at the midpoint of the second guide vane 302 is smaller than the slope at the midpoint of the third guide vane 303. When the slope at the midpoint of the second guide vane 302 is greater than that of the first guide vane 301, the gas can maintain a relatively fast flow rate on the second guide vane 302, thereby minimizing the impact of the first guide vane 301 on the flow rate of the flowing gas.

[0065] In some embodiments, the first guide plate 301 , the second guide plate 302 , and the third guide plate 303 are parallel to each other.

[0066] It can be understood that when the first guide plate 301, the second guide plate 302, and the third guide plate 303 are planar structures, the planes of the three are parallel to the same plane; when the first guide plate 301, the second guide plate 302, and the third guide plate 303 are arc-shaped structures, the tangents of the three points on the first guide plate 301, the second guide plate 302, and the third guide plate 303 that are on the same straight line are parallel to each other.

[0067] In some embodiments, when the first guide plate 301, the second guide plate 302, and the third guide plate 303 are parallel to each other, and the first spacing, the second spacing, and the third spacing are equal to each other, the first guide plate 301, the second guide plate 302, and the third guide plate 303 can be made the same size and shape, thereby facilitating batch production of guide plates and single cells 100 connected to the guide plates.

[0068] In some embodiments, the first guide vane 301 , the second guide vane 302 , and the third guide vane 303 are all perpendicular to the central axis of the intake manifold 200 .

[0069] It should be noted that when the first guide vane 301 , the second guide vane 302 and the third guide vane 303 are planar structures, the planes of the three are perpendicular to the central axis of the intake manifold 200 .

[0070] In some embodiments, a projection of the first guide vane 301 along the length direction of the intake manifold 200 on the first plane is a first projection, a projection of the second guide vane 302 along the length direction of the intake manifold 200 on the first plane is a second projection, and a projection of the third guide vane 303 along the length direction of the intake manifold 200 on the first plane is a third projection. The first plane is perpendicular to the length direction of the intake manifold 200.

[0071] The first projection, the second projection, and the third projection are spaced apart from each other in the first plane.

[0072] It can be understood that the first projection, the second projection, and the third projection are spaced apart from each other in the first plane, so that the first guide vane 301, the second guide vane 302, and the third guide vane 303 are spaced apart in a direction perpendicular to the intake manifold 200, thereby avoiding the upper guide vane from blocking the next guide vane, causing the gas flow rate flowing to the next guide vane to slow down.

[0073] In some embodiments, the first guide vane 301 , the second guide vane 302 , and the third guide vane 303 are disposed around the central axis of the intake manifold 200 .

[0074] Specifically, the first guide vane 301 , the second guide vane 302 and the third guide vane 303 may be planar structures or curved structures, with a certain angle between the central axes of each guide vane, and the central axis of each guide vane is arranged around the central axis of the intake manifold 200 .

[0075] In some embodiments, the first guide plate 301 , the second guide plate 302 , and the third guide plate 303 have the same shape and size.

[0076] It can be understood that the first guide vane 301 , the second guide vane 302 , and the third guide vane 303 are completely consistent in shape and size, and can be mass-produced, saving mold making costs.

[0077] It should be noted that the guide vane assembly described in the technical solution of this application includes a first guide vane 301, a second guide vane 302, and a third guide vane 303, but does not only include the above three guide vanes, but may also include a fourth guide vane, a fifth guide vane...

[0078] It is understandable that, in some embodiments, the gasket 400 provided on each single battery 100 extends toward the other side of the intake manifold 200 to form the first guide plate 301 , the second guide plate 302 , the third guide plate 303 . . .

[0079] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields within the application concept of the present invention are included in the patent protection scope of the present invention.

Claims

1. A battery stack, wherein the battery stack is a stack structure formed by stacking multiple single cells, wherein through holes on the stacked single cells form an intake manifold for introducing reactant gases after stacking, each single cell has an airflow channel connected to the intake manifold, and the direction of the air inlet of the airflow channel intersects the length direction of the intake manifold, characterized in that: A guide vane assembly is provided inside the intake manifold, the guide vane assembly comprising a plurality of guide vanes, one guide vane being provided at the air inlet of each air flow channel, the guide vane being provided at a position at the air inlet away from the air inlet end of the intake manifold, and the free end of the guide vane being close to a side of the intake manifold away from the air inlet; The air flow channel includes a main body and an air intake portion connected to the main body, the air intake port is located in the air intake portion, and the air intake portion is communicated with the intake manifold; The air inlet portion includes a single cell body and a gasket covering the single cell body, wherein the gasket is spaced apart from the surface of the single cell to form the air inlet portion through which gas can flow; The guide plate is connected to the gasket; Wherein, during the stamping process of the electrode plate of the single battery, there is a ridge portion that is not stamped between the preset through hole of the electrode plate and the main body; The gasket is provided with a plurality of through holes spaced apart along the length direction of the gasket, the through holes corresponding to the ridges on the single cells, so that there is a space for air flow between the ridges and the gasket, and the opening length of the through holes on the gasket is greater than the length of the ridges.

2. The battery stack according to claim 1, characterized in that: The guide plate and the gasket are integrally arranged.

3. The battery stack according to claim 1, characterized in that: The guide plate assembly includes a first guide plate, a second guide plate and a third guide plate, wherein the first guide plate, the second guide plate and the third guide plate are respectively arranged on three adjacent single batteries; The first guide vane is located on a side of the second guide vane close to the intake end of the intake manifold, and the third guide vane is located on a side of the second guide vane away from the intake end of the intake manifold; The free end of the first guide vane is spaced from the side of the intake manifold away from the air flow channel by a first distance, the free end of the second guide vane is spaced from the side of the intake manifold away from the air flow channel by a second distance, and the free end of the third guide vane is spaced from the side of the intake manifold away from the air flow channel by a third distance; The first spacing is greater than the second spacing, and the second spacing is greater than the third spacing; or The first interval is equal to the second interval, and the second interval is equal to the third interval.

4. The battery stack according to claim 3, characterized in that: A projection of the first guide vane along the length direction of the intake manifold on a first plane is a first projection, a projection of the second guide vane along the length direction of the intake manifold on the first plane is a second projection, and a projection of the third guide vane along the length direction of the intake manifold on the first plane is a third projection, and the first plane is perpendicular to the length direction of the intake manifold; The first projection, the second projection, and the third projection are spaced apart from each other in the first plane.

5. The battery stack according to claim 3, characterized in that: The first guide vane, the second guide vane, and the third guide vane are parallel to each other.

6. The battery stack according to claim 5, characterized in that: The first guide vane, the second guide vane, and the third guide vane are all perpendicular to a central axis of the intake manifold.

7. The battery stack according to claim 3, characterized in that: The first guide vane, the second guide vane, and the third guide vane are all arranged at an angle, and the free ends of the first guide vane, the second guide vane, and the third guide vane are all arranged toward the intake end of the intake manifold.

8. The battery stack according to claim 7, characterized in that: The angle between the first guide vane and the central axis of the intake manifold is a first angle, the angle between the second guide vane and the central axis of the intake manifold is a second angle, and the angle between the third guide vane and the central axis of the intake manifold is a third angle. The first angle, the second angle, and the third angle are all greater than 0° and less than 90°.

9. The battery stack according to claim 8, characterized in that: The first angle is smaller than the second angle, and the second angle is smaller than the third angle.

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