Water segregator for fuel cell and cell system

Abstract

The invention relates to the technical field of fuel cells, and discloses a water segregator for a fuel cell and a cell system, and the water segregator for the fuel cell comprises a shell, a first baffle plate, a second baffle plate and a third baffle plate. The shell is provided with a water distribution cavity, an air inlet and an air outlet, the first baffle is located between the air inlet and the air outlet, the second baffle is located between the first baffle and the air outlet, and the water distribution cavity is divided into a first sub-cavity, a second sub-cavity and a third sub-cavity. The first baffle is provided with a first communicating hole, and the second baffle is provided with a second communicating hole. And the third baffle is arranged in the second sub-cavity. And water vapor in the gas is condensed and separated through the first baffle, the second baffle and the third baffle in sequence, so that the water vapor separation effect is improved. The first baffle and the second baffle divide the water diversion cavity into the first sub-cavity, the second sub-cavity and the third sub-cavity, the gas needs to penetrate through the first baffle and the second baffle in the moving process, the gas makes full contact with the first baffle and the second baffle, and the water-gas separation effect is further improved.

Description

Technical Field

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

[0002] Hydrogen fuel cells use hydrogen as fuel and convert the chemical energy in the fuel directly into electrical energy through electrochemical reactions. The anode is where the hydrogen undergoes oxidation reactions. Excessive water in the anode is the main factor in the low-power problem of fuel cells. The separation effect of waste hydrogen at the anode outlet of the stack directly affects the performance of the stack. At present, waste hydrogen is generally separated from water and gas through a water separator, which can return as much hydrogen as possible to the hydrogen inlet of the stack. In related technologies, the water separator has the problem of poor water-gas separation effect and high cost. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the water-gas separation effect of the existing water separator is not good.

[0004] In order to solve the above technical problems, the present invention provides a water separator for a fuel cell, comprising:

[0005] A shell, wherein the shell is provided with a water-dividing chamber, an air inlet and an air outlet, the air inlet and the air outlet are arranged at intervals, and the air inlet and the air outlet are both connected to the water-dividing chamber;

[0006] A first baffle, disposed in the water diversion cavity and between the air inlet and the air outlet;

[0007] The second baffle is disposed in the water diversion cavity and between the first baffle and the air outlet.

[0008] The first baffle plate and the second baffle plate divide the water-dividing chamber into a first sub-chamber, a second sub-chamber and a third sub-chamber, the first sub-chamber is communicated with the air inlet, the second sub-chamber is located between the first sub-chamber and the third sub-chamber, the third sub-chamber is communicated with the air outlet, the first baffle plate is provided with at least one first communicating hole, and the second baffle plate is provided with at least one second communicating hole;

[0009] The third baffle is arranged in the second sub-cavity, and an angle is formed between the third baffle and the first baffle.

[0010] According to an embodiment of the present invention, the shell is configured with an air outlet pipe, the air outlet is located on the air outlet pipe, and the air outlet pipe passes through the first baffle plate and the second baffle plate.

[0011] According to an embodiment of the present invention, the second baffle is trumpet-shaped, and the third baffle is connected to the peripheral wall of the second baffle.

[0012] According to one embodiment of the present invention, the diameter of the first end of the second baffle is smaller than the diameter of the second end thereof, the first end of the second baffle is closer to the first baffle than the second end thereof, and the air outlet pipe is disposed through the first end of the second baffle.

[0013] According to an embodiment of the present invention, the air outlet pipe is disposed through the first sub-cavity, and the air inlet is disposed on a peripheral wall of the shell and is opposite to the peripheral wall of the air outlet pipe.

[0014] According to an embodiment of the present invention, the first baffle, the second baffle and the third baffle are an integrated structure.

[0015] According to an embodiment of the present invention, the shell forms an air inlet pipe, the air inlet port is located on the air inlet pipe, and an extending direction of the air inlet pipe is perpendicular to a radial direction of the first sub-cavity.

[0016] According to an embodiment of the present invention, the shell is further provided with a water collecting chamber, and the water collecting chamber is arranged below the water dividing chamber and is communicated with the water dividing chamber.

[0017] According to one embodiment of the present invention, at least one splash shield is provided in the water collecting chamber, and the splash shield extends in a vertical direction.

[0018] The present invention further provides a battery system, comprising a fuel cell and the water separator for the fuel cell as described above, wherein the air inlet of the water separator for the fuel cell is connected to the hydrogen outlet of the fuel cell.

[0019] The water separator for a fuel cell in an embodiment of the present invention sequentially condenses and separates water vapor in the gas through the first baffle, the second baffle, and the third baffle, and separates water vapor in the gas multiple times in a limited space, thereby improving the water vapor separation effect. In addition, the first baffle and the second baffle separate the water separation chamber into the first sub-chamber, the second sub-chamber, and the third sub-chamber, so that the gas needs to pass through the first baffle and the second baffle during movement, and the gas is in full contact with the surfaces of the first baffle and the second baffle, further improving the water vapor separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of a water separator for a fuel cell provided in an embodiment of the present invention.

[0021] Figure 2 This is one of the cross-sectional views of a water separator for a fuel cell provided in an embodiment of the present invention.

[0022] Figure 3 It is a partial structural schematic diagram of a water separator for a fuel cell provided in an embodiment of the present invention.

[0023] Figure 4It is a schematic diagram of the gas flow direction inside a water separator for a fuel cell provided by an embodiment of the present invention.

[0024] Figure 5 This is the second cross-sectional view of the water separator for a fuel cell provided in an embodiment of the present invention.

[0025] Reference numerals:

[0026] 100. Water distributor for fuel cell;

[0027] 110, shell; 1101, first half shell; 1102, second half shell; 111, first sub-chamber; 112, second sub-chamber; 113, third sub-chamber; 114, air inlet pipe; 115, air inlet; 116, air outlet pipe; 117, air outlet; 118, water collecting chamber;

[0028] 120, first baffle; 121, first communication hole;

[0029] 130, second baffle; 131, second connecting hole; 132, reflux angle; 133, flange; 140, third baffle; 141, splash baffle. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In the description of the embodiments of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0034] like Figure 2 As shown, a water separator 100 for a fuel cell according to an embodiment of the present invention includes a housing 110 , a first baffle 120 , a second baffle 130 and a third baffle 140 .

[0035] Specifically, the housing 110 is provided with a water-dividing chamber, an air inlet 115 and an air outlet 117. The air inlet 115 and the air outlet 117 are arranged at intervals, and the air inlet 115 and the air outlet 117 are both connected to the water-dividing chamber. The first baffle 120 is arranged in the water-dividing chamber and is located between the air inlet 115 and the air outlet 117. The second baffle 130 is arranged in the water-dividing chamber and is located between the first baffle 120 and the air outlet 117. The first baffle 120 and the second baffle 130 divide the water-dividing chamber into a first sub-chamber 111, a second sub-chamber 112 and a third sub-chamber 113. The first sub-chamber 111 is connected to the air inlet 115, the second sub-chamber 112 is located between the first sub-chamber 111 and the third sub-chamber 113, and the third sub-chamber 113 is connected to the air outlet 117. The first baffle 120 is provided with at least one first connecting hole 121 to connect the first sub-cavity 111 with the second sub-cavity 112, and the second baffle 130 is provided with at least one second connecting hole 131 to connect the second sub-cavity 112 with the third sub-cavity 113. The gas enters the first sub-cavity 111 from the gas inlet 115, and enters the second sub-cavity 112 through the first connecting hole 121 on the first baffle 120; the gas in the second sub-cavity 112 enters the third sub-cavity 113 through the second connecting hole 131 on the second baffle 130, and finally flows out from the gas outlet 117.

[0036] The third baffle 140 is disposed in the second sub-cavity 112, and an angle is formed between the third baffle 140 and the first baffle 120, such as Figure 2 As shown, the third baffle 140 is located between the first baffle 120 and the second baffle 130, and the third baffle 140 is not parallel to the first baffle 120, so as to increase the area of ​​the third baffle 140 as much as possible within the limited space of the second sub-cavity 112, thereby increasing the condensation speed of water vapor. Figure 2In the example, the third baffle 140 is arranged perpendicular to the first baffle 120. The third baffle 140 can be multiple, and the multiple third baffles 140 are arranged at intervals.

[0037] The gas enters the first sub-chamber 111 from the air inlet 115 and flows toward the air outlet 117. When the gas flows from the first sub-chamber 111 to the second sub-chamber 112, the gas hits the first baffle 120, and the water vapor in the gas condenses on the first baffle 120. The gas flows into the second sub-chamber 112 through the first connecting hole 121. In the second sub-chamber 112, the gas contacts the third baffle 140, and the water vapor condenses on the third baffle 140. The gas in the second sub-chamber 112 continues to flow toward the air outlet 117. At this time, the gas hits the second baffle 130, and the water vapor in the gas further condenses. The gas flows into the third sub-chamber 113 through the second connecting hole 131 on the second baffle 130, and finally the gas flows out of the water-dividing chamber from the air outlet 117.

[0038] In this way, the gas hits the first baffle 120 during the process from the air inlet 115 to the air outlet 117, causing the water vapor therein to initially condense; in the second sub-chamber 112, the gas contacts the third baffle 140, causing the water vapor therein to further condense; finally, the gas hits the second baffle 130, causing the water vapor that is not fully separated to condense. The gas is separated from the water vapor through three baffles in the water separation chamber, thereby improving the water vapor separation effect. In addition, due to the setting of the first baffle 120 and the second baffle 130, the gas needs to pass through the first baffle 120 and the second baffle 130 during the process of flowing from the air inlet 115 to the air outlet 117, so that the gas is fully in contact with the surfaces of the first baffle 120 and the second baffle 130, further improving the condensation effect of the gas.

[0039] According to the water separator 100 for a fuel cell according to an embodiment of the present invention, water vapor in the gas is separated in sequence by the first baffle 120, the second baffle 130 and the third baffle 140, and the water vapor in the gas is separated multiple times in a limited space, thereby improving the water vapor separation effect. In addition, the first baffle 120 and the second baffle 130 separate the water separation chamber into the first sub-chamber 111, the second sub-chamber 112 and the third sub-chamber 113, so that the gas needs to pass through the first baffle 120 and the second baffle 130 during the movement, and the gas is fully in contact with the surface of the first baffle 120 and the second baffle 130, further improving the water vapor separation effect.

[0040] like Figure 1 and Figure 2As shown, according to some embodiments of the present invention, the shell 110 is constructed with an air outlet pipe 116, and the air outlet port 117 is located on the air outlet pipe 116. The air outlet pipe 116 passes through the first baffle 120 and the second baffle 130. The first end of the air outlet pipe 116 is located in the third sub-cavity 113, and the air outlet port 117 is located at the first end of the air outlet pipe 116. The second end of the air outlet pipe 116 is located outside the shell 110, so as to lengthen the flow path of the gas. Water vapor can be further condensed in the air outlet pipe 116, thereby reducing the water vapor content in the gas output by the water separator 100 for the fuel cell.

[0041] See also Figure 2 As shown, according to some embodiments of the present invention, the second baffle 130 is trumpet-shaped to increase the contact area between the second baffle 130 and the gas and improve the water separation efficiency. The third baffle 140 is connected to the peripheral wall of the second baffle 130, and specifically, the side of the third baffle 140 is connected to the peripheral wall of the second baffle 130. In this way, by setting the second baffle 130 to a trumpet shape with a spatial structure and setting the third baffle 140 at an angle to the first baffle 120, the space of the water separation chamber is fully utilized, the water separation efficiency is improved, and it is conducive to the miniaturization design of the water separator 100 for the fuel cell. The third baffle 140 can be provided with multiple pieces, and the multiple third baffles 140 are spaced and distributed along the circumferential direction of the second baffle 130, so as to increase the contact area between the third baffle 140 and the gas.

[0042] According to some embodiments of the present invention, the diameter of the first end of the second baffle 130 is smaller than the diameter of the second end thereof, the first end of the second baffle 130 is closer to the first baffle 120 than the second end thereof, and the air outlet pipe 116 is disposed through the first end of the second baffle 130. Figure 2 and Figure 3 As shown, the opening of the trumpet-shaped second baffle 130 is set downward, and the air outlet pipe 116 is arranged from top to bottom (as shown in FIG. Figure 2 ) to pass through the second baffle 130. Thus, a reflux angle 132 is formed between the inner peripheral wall of the second baffle 130 and the peripheral wall of the outlet pipe 116. When the gas flows from the third sub-chamber 113 to the outlet port 117 on the outlet pipe 116, part of the gas flows to the reflux angle 132 and then to the outlet port 117, so that the water vapor in the gas is further condensed and separated.

[0043] like Figure 2 As shown, according to some embodiments of the present invention, the air outlet pipe 116 is arranged in the first sub-cavity 111, and the air inlet 115 is arranged on the peripheral wall of the shell 110 and opposite to the peripheral wall of the air outlet pipe 116, which is conducive to water vapor separation. When the gas enters the first sub-cavity 111 from the air inlet 115, it contacts the air outlet pipe 116, so that the water vapor therein condenses on the wall of the air outlet pipe 116.

[0044] According to some embodiments of the present invention, the first baffle 120, the second baffle 130 and the third baffle 140 are an integrated structure to save processes, reduce costs, and facilitate installation and replacement. The first baffle 120, the second baffle 130 and the third baffle 140 can be formed by integral die casting or integral casting.

[0045] like Figure 1 and Figure 5 As shown, according to some embodiments of the present invention, the housing 110 is constructed with an air inlet pipe 114, and the air inlet port 115 is located on the air inlet pipe 114. The extension direction of the air inlet pipe 114 is perpendicular to the radial direction of the first sub-chamber 111. One end of the air inlet pipe 114 is connected to the peripheral wall of the housing 110, and the air inlet port 115 is located at the connection between the air inlet pipe 114 and the housing 110. The air inlet pipe 114 extends out of the housing 110 along a radial direction perpendicular to the first sub-chamber 111. Thus, the velocity loss of the input gas is reduced, and the gas has a higher tangential velocity when entering the first sub-chamber 111 from the air inlet pipe 114, and larger droplets in the gas are separated under the action of centrifugal force. After passing through the first baffle 120 and entering the second sub-chamber 112, the gas still has a certain tangential velocity. The gas in the second sub-chamber 112 hits the third baffle 140 to quickly condense the water vapor therein, thereby increasing the water separation speed.

[0046] like Figure 1 and Figure 2 As shown, the housing 110 is generally cylindrical, the first baffle 120 and the second baffle 130 are arranged at intervals from top to bottom, and the water-dividing chamber is sequentially divided into the first sub-chamber 111, the second sub-chamber 112 and the third sub-chamber 113 from top to bottom, the axis of the air outlet pipe 116 is on the same straight line as the axis of the housing 110, and the air outlet pipe 116 passes through the top wall of the housing 110, the first baffle 120 and the second baffle 130 from top to bottom, the first end of the air outlet pipe 116 is located in the third sub-chamber 113, and the second end is located outside the housing 110. Since the extension direction of the air inlet pipe 114 is perpendicular to the radial direction of the first sub-chamber 111, the gas is input from the air inlet pipe 114 into the first sub-chamber 111 and rotates around the air outlet pipe 116, and the larger droplets in the gas are separated and attached to the inner wall of the housing 110.

[0047] According to some embodiments of the present invention, the housing 110 is further provided with a water collecting chamber 118, which is provided below the water dividing chamber and communicated with the water dividing chamber to collect the separated water. Figure 2As shown, the water collecting chamber 118 is arranged below the third sub-chamber 113, and the liquid water attached to the inner wall of the housing 110, the first baffle 120, the second baffle 130, the third baffle 140 and the gas outlet pipe 116 falls into the water collecting chamber 118. In some embodiments, the first end of the gas outlet pipe 116 is located in the trumpet-shaped second baffle 130, and the second baffle 130 defines the third sub-chamber 113, so that the gas outlet 117 is away from the water collecting chamber 118, so as to avoid the formation of negative pressure when the gas flows out from the gas outlet 117, so that the water in the water collecting chamber 118 splashes and is sucked into the gas outlet pipe 116, resulting in an increase in the water content in the output gas.

[0048] like Figure 2 As shown, according to some embodiments of the present invention, at least one splash shield 141 is provided in the water collecting chamber 118, and the splash shield 141 extends in the vertical direction and is connected to the inner wall of the housing 110. On the one hand, the oscillation amplitude of the water in the water collecting chamber 118 during the movement is reduced, and on the other hand, the gas can be prevented from impacting the water in the water collecting chamber 118, and the water can be prevented from splashing under the action of negative pressure and being sucked into the gas outlet pipe 116. Figure 2 As shown, the housing 110 includes a first half shell 1101 and a second half shell 1102, the water dividing chamber is provided in the first half shell 1101, the first half shell 1101 is provided with an air inlet pipe 114 and an air outlet pipe 116, the water collecting chamber 118 is provided in the second half shell 1102, the first half shell 1101 and the second half shell 1102 are detachably connected, and a sealing member is provided at the connection between the first half shell 1101 and the second half shell 1102. The edge of the second baffle 130 is provided with a flange 133, and the flange 133 is clamped at the connection between the first half shell 1101 and the second half shell 1102 for fixing. When the first baffle 120, the second baffle 130 and the third baffle 140 are an integrated structure, the first baffle 120, the second baffle 130 and the third baffle 140 can be fixed by the flange 133 on the second baffle 130 in cooperation with the outlet pipe 116, thereby simplifying the internal structure of the water separator 100 for the fuel cell and facilitating installation and disassembly.

[0049] A battery system provided according to the present invention includes a fuel cell and the water separator 100 for the fuel cell as described above, wherein the air inlet 115 of the water separator 100 for the fuel cell is connected to the hydrogen outlet of the fuel cell to separate the water and gas from the waste hydrogen so that more hydrogen can be recycled and reused. The battery system also includes a circulation pipeline, one end of which is connected to the air outlet 117 of the water separator 100 for the fuel cell, and the other end is connected to the hydrogen inlet of the fuel cell to transport the hydrogen separated from the water and gas to the anode of the fuel cell for use.

[0050] The working process of the present invention is:

[0051] like Figure 4As shown, the arrows in the figure indicate the flow direction of the gas. The gas with a high water content is input into the first sub-chamber 111 from the air inlet pipe 114 through the air inlet port 115, and the gas rotates around the air outlet pipe 116. The droplets with a larger weight in the gas are separated under the action of centrifugal force; part of the gas contacts the outer wall of the air outlet pipe 116, so that the undivided water vapor condenses on the outer wall of the air outlet pipe 116. The gas in the first sub-chamber 111 flows toward the air outlet 117 and hits the first baffle 120, and the water vapor therein condenses on the surface of the first baffle 120. The gas in the first sub-chamber 111 flows into the second sub-chamber 112 through the first connecting hole 121 on the first baffle 120. Since the gas still has a certain tangential velocity, the gas flows around the air outlet pipe 116 in the second sub-chamber 112. Since the third baffle 140 is set at an angle with the first baffle 120, the gas hits the third baffle 140 during the movement, so that the remaining water vapor therein condenses on the surface of the third baffle 140.

[0052] The gas in the second sub-chamber 112 hits the second baffle 130 during the flow toward the gas outlet 117, and the remaining water vapor in the gas condenses on the second baffle 130. The gas flows into the third sub-chamber 113 through the second connecting hole 131 on the second baffle 130, and then passes through the gas outlet 117 and the gas outlet pipe 116 before being output. In the third sub-chamber 113, when the gas flows into the gas outlet pipe 116, part of the gas flows to the reflux angle 132 formed between the gas outlet pipe 116 and the second baffle 130, which can promote the condensation of the remaining water vapor in the part of the gas, and further reduce the water vapor content in the output gas. The liquid water separated in the water separation chamber flows into the water collection chamber 118 under the action of gravity for collection.

[0053] In summary, the embodiment of the present invention provides a water separator 100 for a fuel cell, which has at least the following beneficial effects:

[0054] 1. The water-gas separation effect is improved by setting the first baffle, the second baffle 130 and the third baffle 140, which is beneficial to the miniaturization design of the water separator 100 for the fuel cell;

[0055] 2. The water separator 100 for a fuel cell has a simple internal structure and low production cost;

[0056] 3. The arrangement of the air inlet pipe 114 allows the input gas to have a large tangential velocity, which is beneficial to the initial separation of liquid droplets in the gas, and allows the gas to maintain the tangential velocity and collide with the third baffle 140, thereby improving the water-gas separation effect.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A water separator (100) for a fuel cell, characterized in that: include: A housing (110), wherein the housing (110) is provided with a water separation chamber, an air inlet (115) and an air outlet (117), wherein the air inlet (115) and the air outlet (117) are arranged at intervals, and the air inlet (115) and the air outlet (117) are both in communication with the water separation chamber; A first baffle (120) is disposed in the water diversion chamber and between the air inlet (115) and the air outlet (117); The second baffle (130) is disposed in the water diversion chamber and between the first baffle (120) and the air outlet (117). The first baffle plate (120) and the second baffle plate (130) divide the water-dividing chamber into a first sub-chamber (111), a second sub-chamber (112) and a third sub-chamber (113); the first sub-chamber (111) is communicated with the air inlet (115); the second sub-chamber (112) is located between the first sub-chamber (111) and the third sub-chamber (113); the third sub-chamber (113) is communicated with the air outlet (117); the first baffle plate (120) is provided with at least one first communicating hole (121); and the second baffle plate (130) is provided with at least one second communicating hole (131); A third baffle (140) is disposed in the second sub-cavity (112), and an angle is formed between the third baffle (140) and the first baffle (120).

2. The water separator (100) for a fuel cell according to claim 1, characterized in that: The housing (110) is configured with an air outlet pipe (116), the air outlet (117) is located on the air outlet pipe (116), and the air outlet pipe (116) is provided through the first baffle plate (120) and the second baffle plate (130).

3. The water separator (100) for a fuel cell according to claim 2, characterized in that: The second baffle (130) is trumpet-shaped, and the third baffle (140) is connected to the peripheral wall of the second baffle (130).

4. The water separator (100) for a fuel cell according to claim 3, characterized in that: The diameter of the first end of the second baffle plate (130) is smaller than the diameter of the second end thereof, the first end of the second baffle plate (130) is closer to the first baffle plate (120) than the second end thereof, and the air outlet pipe (116) is disposed through the first end of the second baffle plate (130).

5. The water separator (100) for a fuel cell according to claim 2, characterized in that: The air outlet pipe (116) is arranged in the first sub-cavity (111), and the air inlet (115) is arranged on the peripheral wall of the shell (110) and is opposite to the peripheral wall of the air outlet pipe (116).

6. The water separator (100) for a fuel cell according to any one of claims 1 to 5, characterized in that: The first baffle (120), the second baffle (130) and the third baffle (140) are an integrated structure.

7. The water separator (100) for a fuel cell according to claim 1, characterized in that: The housing (110) is configured with an air inlet pipe (114), the air inlet port (115) is located on the air inlet pipe (114), and the extension direction of the air inlet pipe (114) is perpendicular to the radial direction of the first sub-cavity (111).

8. The water separator (100) for a fuel cell according to claim 1, characterized in that: The housing (110) is further provided with a water collecting chamber (118), and the water collecting chamber (118) is arranged below the water dividing chamber and is in communication with the water dividing chamber.

9. The water separator (100) for a fuel cell according to claim 8, characterized in that: At least one splash shield (141) is provided in the water collecting chamber (118), and the splash shield (141) extends in a vertical direction.

10. A battery system, characterized in that: The invention comprises a fuel cell and a water separator (100) for a fuel cell according to any one of claims 1 to 9, wherein an air inlet (115) of the water separator (100) for a fuel cell is connected to a hydrogen outlet of the fuel cell.

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