Make-up water tank of a fuel cell system and fuel cell system

Abstract

The present invention belongs to the field of fuel cells, and discloses a water replenishing tank of a fuel cell system and a fuel cell system. The water replenishing tank of the fuel cell system includes a water tank, a partition plate and a deionization core. The partition plate is vertically arranged in the water tank, separating the water tank into a first accommodation chamber and a second accommodation chamber. A through portion is provided on the partition plate. A main drain port is provided at the bottom of the first accommodation chamber, and a liquid replenishing port is provided at the bottom of the second accommodation chamber. The deionization core is arranged in the first accommodation chamber. An inlet is provided at the bottom of the deionization core, and the inlet is communicated with the main drain port through a pipeline. An outlet is provided on the top side wall of the deionization core. In the present invention, the deionization core is integrated in the water tank, which not only has fewer pipeline connections and fewer leakage points, but also has a small layout space and is convenient for layout. The coolant flows from bottom to top, which can make full use of the deionization core to improve the deionization effect. The liquid replenishing port is arranged at the bottom of the water tank, which can avoid the phenomenon that there is coolant in the water tank but the fuel cell cannot be replenished with liquid.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel cells, and particularly relates to a water replenishing tank for a fuel cell system and a fuel cell system. Background Art

[0002] In recent years, against the backdrop of the global response to energy conservation, emission reduction, and the use of clean energy, major countries and regions have paid increasing attention to the development and utilization of hydrogen energy and gradually included hydrogen energy in relevant development strategies and industrial policies, which has greatly attracted attention to the fuel cell vehicle industry as its main carrier. Some countries have listed the fuel cell vehicle industry as a national development strategy, planned and laid out the upstream hydrogen energy and fuel cell industries earlier, and continuously promoted the growth of the global number of fuel cell vehicles in operation. With the increasing maturity of technology, the global number of fuel cell vehicles in operation has increased rapidly. The domestic hydrogen fuel cell industry is also booming under the strong stimulation of policies and the market.

[0003] In a fuel cell system, the cooling system is an essential part. The fuel cell system has requirements for the temperature, flow rate, and conductivity of the cooling system. Currently in the industry, a water replenishing tank is mainly used to compensate the coolant of the system, and a deionizer is used to reduce the conductivity of the system. There are mainly the following several methods: The first is to separately arrange the water replenishing tank and the deionizer in the system. The disadvantage of this design is that the system design is complex, there are many pipelines, it occupies a large layout space, there are many leakage points, and when the deionizer is replaced, the pipelines need to be disassembled, which is likely to cause coolant leakage; the second is to integrate the deionizer into the water tank, and a liquid inlet is designed on the water tank cover. The coolant in the system enters the deionizer in the water tank from the liquid inlet on the water tank cover, and then enters the water tank from the openings around the deionizer. The disadvantage of this design is that both the exhaust and the liquid inlet are from top to bottom. After the coolant enters the deionizer, the resistance below the liquid level is greater than the resistance above the liquid level, which will cause most of the coolant to leave the deionizer above the liquid level, resulting in the inability to fully utilize the deionizer and reducing the deionization effect of the deionizer; the third is to directly place the deionizer on the water replenishing port of the water replenishing tank so that the deionizer is immersed below the liquid level. The disadvantage of this design is that when the water level drops and the volume shrinks, if the liquid level does not exceed the uppermost liquid inlet of the deionizer, a large amount of coolant in the water tank will not be able to be replenished into the fuel cell system, resulting in the risk of system water shortage; and in order to avoid the risk of system water shortage, it is required that the liquid level be much higher than the height of the deionizer, which makes the liquid level requirement of the water tank very high, thus resulting in a very high height of the water tank and increasing the difficulty of space layout. Summary of the Invention

[0004] The purpose of the present invention is to provide a water replenishing tank for a fuel cell system and a fuel cell system, which can not only improve the deionization effect but also reduce the requirement for the volume of the coolant.

[0005] The technical solution provided by the present invention is as follows:

[0006] On the one hand, a water replenishing tank for a fuel cell system is provided, including:

[0007] A water tank;

[0008] A partition, which is vertically arranged in the water tank and divides the water tank into a first accommodating cavity and a second accommodating cavity. A through portion for communicating the first accommodating cavity and the second accommodating cavity is provided on the partition. A main drain port for draining the coolant in the fuel cell into the first accommodating cavity is provided at the bottom of the first accommodating cavity, and a liquid replenishing port for replenishing the coolant to the fuel cell is provided at the bottom of the second accommodating cavity;

[0009] A deionized core body, which is arranged in the first accommodating cavity. An inlet is provided at the bottom of the deionized core body, and the inlet is communicated with the main drain port through a pipeline. An outlet is provided on the side wall at the top of the deionized core body.

[0010] Further, a deionized core body cover is further included;

[0011] The deionized core body cover is arranged at the top end of the deionized core body;

[0012] A connection hole is provided at the top of the first accommodating cavity, and the connection hole protrudes from the water tank;

[0013] The diameter of the deionized core body is smaller than the diameter of the connection hole;

[0014] The deionized core body cover covers the connection hole.

[0015] Further, the deionized core body cover is detachably connected to the deionized core body.

[0016] Further, the deionized core body includes a shell and a bottom cover, the bottom cover is detachably arranged at the bottom of the shell, the inlet is provided on the bottom cover, and the outlet is provided on the side wall of the shell at the end away from the bottom cover.

[0017] Further, the deionized core body further includes a filter screen, the filter screen is arranged in the shell, and the height of the filter screen from the bottom cover is the same as the height of the bottom end of the outlet from the bottom cover;

[0018] The area between the bottom cover and the filter screen in the shell is filled with ion adsorption resin.

[0019] Further, the ratio range of the cross-sectional area of the deionized core body to the cross-sectional area of the first accommodating cavity is 1 to 1.2.

[0020] Further, an auxiliary drain port for draining the coolant in the fuel cell into the water tank is further provided on the second accommodation chamber, and the auxiliary drain port is arranged at the top of the second accommodation chamber.

[0021] Further, a pressure cover is further included;

[0022] A liquid filling port is arranged at the top of the second accommodation chamber, the liquid filling port protrudes from the water tank, and the pressure cover is arranged on the liquid filling port.

[0023] Further, a mounting bracket arranged outside the water tank is further included;

[0024] One end of the mounting bracket is connected to the water tank, and a connecting portion is arranged at the other end of the mounting bracket.

[0025] On the other hand, a fuel cell system is further provided, including the water replenishing tank of the fuel cell system described in any one of the above.

[0026] Through the water replenishing tank of a fuel cell system and the fuel cell system provided by the present invention, at least one of the following beneficial effects can be brought: the deionization core is integrated in the water tank in the present invention, which not only has fewer pipeline connections and fewer leakage points, but also has a small layout space and is convenient for layout; the coolant and gas discharged from the fuel cell enter the deionization core from the bottom of the water tank, and then are discharged from the top of the deionization core, so that the coolant can completely flow through the deionization core to make full use of the deionization core and maximize the deionization effect; the deionization core is arranged in the first accommodation chamber, most of the space in the first accommodation chamber is occupied by the deionization core, and a small amount of coolant can fill the first accommodation chamber, so that the requirement for the volume of the coolant is not high and there is no strict requirement for the height design of the water tank. In addition, the liquid replenishing port is arranged at the bottom of the water tank, which can avoid the phenomenon that there is coolant in the water tank but the fuel cell cannot be replenished with liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above characteristics, technical features, advantages and implementation manners of a water replenishing tank of a fuel cell system and a fuel cell system will be further described below in a clear and understandable manner in conjunction with the drawings in the preferred embodiments.

[0028] Figure 1 is a sectional view of a water replenishing tank of a fuel cell system of the present invention;

[0029] Figure 2 is a front view of a water replenishing tank of a fuel cell system of the present invention;

[0030] Figure 3 is a sectional view of a water replenishing tank of a fuel cell system of the present invention when the deionization core is not provided;

[0031] Figure 4 It is a schematic structural diagram of the deionization core of the water replenishing tank of a fuel cell system according to the present invention;

[0032] Figure 5 It is a sectional view of the deionization core of the water replenishing tank of a fuel cell system according to the present invention;

[0033] Figure 6 It is a schematic internal structure diagram of the deionization core of the water replenishing tank of a fuel cell system according to the present invention.

[0034] Explanation of the reference numerals in the drawings

[0035] 1. Water tank; 11. First accommodation cavity; 12. Second accommodation cavity; 13. Main drain port; 14. Liquid replenishing port; 15. Connection hole; 16. Auxiliary drain port; 17. Liquid filling port; 2. Partition board; 21. Through portion; 3. Deionization core; 31. Water inlet; 32. Water outlet; 33. Housing; 34. Bottom cover; 35. Filter screen; 4. Deionization core cover; 5. Pressure cover; 6. Mounting bracket; 61. Connection portion; 7. Reinforcing rib. Detailed implementation manners

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts, and other implementation manners can also be obtained.

[0037] For the sake of simplicity of the drawings, only the parts related to the present invention are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, in some drawings, parts with the same structure or function are only schematically shown as one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation.

[0038] It should also be further understood that the term "and / or" used in the specification and appended claims of the present application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0039] In this text, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings and other implementation manners can be obtained.

[0042] An embodiment of the present invention provides a water replenishing tank for a fuel cell system, as Figures 1 to 3 shown, which includes a water tank 1, a partition 2, and a deionized core 3. The water tank 1 is filled with a coolant, and the water tank 1 can be designed into any shape according to the assembly requirements, such as a cuboid, a cube, or a cylinder, etc. The present application does not limit the specific shape of the water tank 1.

[0043] The partition 2 is vertically arranged in the water tank 1, dividing the water tank 1 into a first accommodation chamber 11 and a second accommodation chamber 12. The partition 2 is provided with a through portion 21 for communicating the first accommodation chamber 11 and the second accommodation chamber 12. The through portion 21 can be a through hole provided in the partition 2, that is, connecting the bottom end of the partition 2 to the bottom of the water tank 1, connecting the top end of the partition 2 to the top of the water tank 1, and then providing a through hole in the partition 2; in addition, the bottom end of the partition 2 can also be connected to the bottom of the water tank 1, and the top end of the partition 2 is not connected to the top of the water tank 1, so that a gap is formed between the top end of the partition 2 and the top of the water tank 1, and this gap is the through portion 21. When the two ends of the partition 2 are respectively connected to the water tank 1, the through portion 21 can be provided at any height on the partition 2; when the bottom end of the partition 2 is connected to the bottom of the water tank 1 and the top end of the partition 2 is not connected to the top of the water tank 1, the height of the partition 2 should not be set too low to avoid being unable to limit the deionized core 3 when installing the deionized core 3 and increasing the installation difficulty of the deionized core 3.

[0044] The bottom of the first accommodation chamber 11 is provided with a main drain port 13 for draining the coolant in the fuel cell into the first accommodation chamber 11, and the bottom of the second accommodation chamber 12 is provided with a liquid replenishment port 14 for replenishing the coolant to the fuel cell; the deionization core 3 is arranged in the first accommodation chamber 11, and the bottom of the deionization core 3 is provided with a water inlet 31, and the water inlet 31 is communicated with the main drain port 13 through a pipeline, and a water outlet 32 is arranged on the side wall of the top of the deionization core 3.

[0045] The main drain port 13 and the liquid replenishment port 14 on the water tank 1 are respectively connected to the fuel cell to form a liquid replenishment loop. When the make-up water tank initially replenishes the coolant for the fuel cell, the coolant in the water tank 1 replenishes the fuel cell through the liquid replenishment port 14, and the air in the fuel cell enters the water tank 1 through the main drain port 13 to realize the exhaust function of the fuel cell. During the continuous operation of the fuel cell, the coolant in the water tank 1 replenishes the fuel cell through the liquid replenishment port 14, and the coolant flows back to the water tank 1 through the main drain port 13 after passing through the fuel cell. The main drain port 13 is communicated with the water inlet 31 at the bottom of the deionization core 3 through a pipeline, so that the coolant drained through the main drain port 13 directly enters the water inlet 31 at the bottom of the deionization core 3 through the pipeline, and then enters the deionization core 3 through the water inlet 31. The side wall of the top of the deionization core 3 is provided with a water outlet 32. By using the full liquid overflow method, the coolant completely flows through the deionization core 3 to reduce the conductivity of the coolant. The coolant with reduced conductivity is then discharged into the first accommodation chamber 11 from the water outlet 32 on the side wall of the top of the deionization core 3, and finally enters the second accommodation chamber 12 through the through portion 21 to complete the circulating liquid replenishment of the fuel cell.

[0046] In this embodiment, integrating the deionization core 3 into the water tank 1 not only reduces the number of pipeline connections and leakage points, but also has a small layout space and is convenient for layout; the coolant and gas discharged from the fuel cell enter the deionization core 3 from the bottom of the water tank 1 and then are discharged from the top of the deionization core 3, which can make the coolant completely flow through the deionization core 3 to make full use of the deionization core 3 and maximize the deionization effect; the deionization core 3 is arranged in the first accommodation chamber 11, and most of the space in the first accommodation chamber 11 is occupied by the deionization core 3. A small amount of coolant can fill the first accommodation chamber 11, so that the requirement for the volume of the coolant is not high, and there is no strict requirement for the height design of the water tank 1. In addition, the liquid replenishment port 14 is arranged at the bottom of the water tank 1, which can avoid the phenomenon that there is coolant in the water tank 1 but the fuel cell cannot be replenished with liquid.

[0047] In one embodiment, as Figure 1As shown, it further includes a deionized core cover 4; the deionized core cover 4 is arranged at the top of the deionized core 3; a connection hole 15 is provided at the top of the first accommodation cavity 11, and the connection hole 15 can be integrally formed with the water tank 1, and the connection hole 15 protrudes from the water tank 1; the diameter of the deionized core 3 is smaller than the diameter of the connection hole 15, which facilitates the removal of the deionized core 3 from the connection hole 15; the deionized core cover 4 covers the connection hole 15, and threads are respectively provided on the connection hole 15 and the deionized core cover 4, so that the deionized core cover 4 is threadedly connected to the connection hole 15.

[0048] The deionized core cover 4 is arranged at the top of the deionized core 3, and the diameter of the deionized core 3 is smaller than the diameter of the connection hole 15. After the fuel cell system operates for a period of time and the deionized core 3 needs to be replaced, the deionized core cover 4 and the deionized core 3 can be detached from the water tank 1 as a whole, without causing the coolant in the water tank 1 to flow out. The deionized core cover 4 covers the connection hole 15. When replacing the deionized core 3, only the connection between the deionized core cover 4 and the connection hole 15 needs to be disconnected, without the need to rotate the drain pipe on the water tank 1 cover, avoiding loosening of the pipe orifice and further avoiding liquid leakage.

[0049] Preferably, the deionized core cover 4 and the deionized core 3 are detachably connected. The deionized core 3 and the deionized core cover 4 can be connected together through a connection bayonet. The connection bayonet is arranged at the top of the deionized core 3, or can also be connected together through threads. As long as the detachable connection between the deionized core 3 and the deionized core cover 4 can be achieved, the present application does not make any limitation on the specific connection method between the deionized core cover 4 and the deionized core 3.

[0050] After removing the deionized core 3 and the deionized core cover 4 as a whole from the water tank 1, the deionized core 3 can be removed from the deionized core cover 4 to replace it with a new deionized core 3, that is, only the deionized core 3 needs to be replaced, without the need to replace the deionized core cover 4, enabling the deionized core cover 4 to be reused and reducing the use cost.

[0051] In one embodiment, as Figures 4 to 6 shown, the deionized core 3 includes a housing 33 and a bottom cover 34. The bottom cover 34 is detachably arranged at the bottom of the housing 33. An inlet 31 is provided on the bottom cover 34, and an outlet 32 is provided on the side wall of the housing 33 away from the bottom cover 34.

[0052] The bottom cover 34 is detachably arranged at the bottom of the housing 33. After removing the deionized core 3 from the water tank 1, the bottom cover 34 can be opened to replace the ion adsorption resin inside the deionized core 3, without the need to replace the entire deionized core 3, enabling other components of the deionized core 3 to be reused and reducing the use cost.

[0053] The deionization core 3 further includes a filter screen 35 disposed within the housing 33. The height of the filter screen 35 from the bottom cover 34 is the same as the height of the bottom end of the water outlet 32 from the bottom cover 34. There is also a filter screen in the area above the bottom cover 34 and below the filter screen 35 within the housing 33, and the area between this filter screen and the filter screen 35 is filled with ion adsorption resin.

[0054] Setting the filter screen 35 to be at the same height as the bottom end of the water outlet 32, and the water outlet 32 being disposed on the top side wall of the housing 33 can maximize the volume between the two filter screens to accommodate more ion adsorption resin, thereby improving the ion adsorption effect of the deionization core 3.

[0055] In one embodiment, the ratio of the cross-sectional area of the deionization core 3 to the cross-sectional area of the first accommodation cavity 11 ranges from 1 to 1.2. For the convenience of taking and placing the deionization core 3, the cross-sectional area of the first accommodation cavity 11 should be larger than that of the deionization core 3. However, when the cross-sectional area of the first accommodation cavity 11 is too large, the requirement for the volume of the coolant will increase. Therefore, when designing the first accommodation cavity 11, the ratio of the cross-sectional area of the ion core 3 to the cross-sectional area of the first accommodation cavity 11 is set to range from 1 to 1.2, which can minimize the requirement for the volume of the coolant while ensuring the convenience of taking and placing the deionization core 3.

[0056] Preferably, as Figure 1 shown, the second accommodation cavity 12 is further provided with an auxiliary drain port 16 for draining the coolant in the fuel cell into the water tank 1. The auxiliary drain port 16 is disposed at the top of the second accommodation cavity 12.

[0057] The auxiliary drain port 16 is connected to the fuel cell pipeline. The auxiliary drain port 16 and the main drain port 13 at the bottom of the first accommodation cavity 11 have the same function, which is to recycle the coolant passing through the fuel cell into the water tank 1. However, the main drain port 13 plays a major recycling role, and the auxiliary drain port 16 plays an auxiliary recycling role. The coolant entering the water tank 1 from the auxiliary drain port 16 is less than that entering the water tank 1 from the main drain port 13, that is, the amount of liquid entering the auxiliary drain port 16 is small. Therefore, the auxiliary drain port 16 needs to be disposed at the top of the second accommodation cavity 12. If the auxiliary drain port 16 is disposed at the bottom of the water tank 1, due to the large resistance under the liquid level and the small flow rate of the coolant entering the auxiliary drain port 16, it cannot overcome the resistance under the liquid level and enter the water tank 1, resulting in the coolant being unable to enter the water tank 1 through the auxiliary drain port 16. Since the amount of coolant drained into the water tank 1 from the auxiliary drain port 16 is small, although the coolant entering from the auxiliary drain port 16 enters the water tank 1 without passing through the deionization core 3, it will not cause a significant change in the conductivity of the coolant in the water tank 1. During the actual operation of the fuel cell system, the fuel cell system will discharge gas, and this gas enters the water tank 1 along with the liquid from the auxiliary drain port 16 or the main drain port.

[0058] Preferably, as Figure 1 shown, it further includes a pressure cap 5; a liquid filling port 17 is provided at the top of the second accommodation chamber 12. The liquid filling port 17 protrudes from the water tank 1. The pressure cap 5 is arranged on the liquid filling port 17 and can be threadedly connected to the liquid filling port 17. Arranging the pressure cap 5 on the water tank 1 can provide positive pressure to the fuel cell system and ensure that the boiling point of the coolant is above the highest temperature of the fuel cell system. The liquid filling port 17 can be used to fill the coolant into the water tank 1.

[0059] Preferably, as Figure 1 shown, it further includes a mounting bracket 6 arranged outside the water tank 1; one end of the mounting bracket 6 is connected to the water tank 1, and the other end of the mounting bracket 6 is provided with a connecting portion 61. The water tank 1 is fixedly installed through the connecting portion 61. The number of the mounting brackets 6 is one or more and they are distributed outside the water tank 1.

[0060] A plurality of reinforcing ribs 7 are further arranged in the water tank 1. At least one reinforcing rib 7 is arranged in the water tank 1 along the height direction of the water tank 1, and at least one reinforcing rib 7 is arranged in the water tank 1 along the length direction of the water tank 1. Arranging a plurality of reinforcing ribs 7 can improve the strength of the water tank 1.

[0061] An embodiment of the present invention further provides a fuel cell system, as Figures 1 to 6 shown, this fuel cell system includes the replenishing water tank of the fuel cell system in any of the above embodiments. After the coolant is filled into the water tank 1, the coolant flows out from the liquid replenishing port 14 on the water tank 1, flows through the fuel cell and then enters the deionization core 3 in the water tank 1 from the main drain port 13 on the water tank 1. After being deionized by the deionization core 3, it enters the water tank 1, and then replenishes the fuel cell through the liquid replenishing port 14. Through continuous circulation, the purpose of compensating the coolant of the fuel cell is achieved.

[0062] It should be noted that the above embodiments can be freely combined according to needs. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A water replenishing tank for a fuel cell system, characterized in that, Comprising: A water tank; A partition board, which is vertically arranged in the water tank and divides the water tank into a first accommodation cavity and a second accommodation cavity. A through hole is provided on the partition board to make the first accommodation cavity and the second accommodation cavity communicate with each other. A main drain port for draining the coolant in the fuel cell into the first accommodation cavity is provided at the bottom of the first accommodation cavity. A liquid replenishment port for replenishing the coolant to the fuel cell is provided at the bottom of the second accommodation cavity. An auxiliary drain port for draining the coolant in the fuel cell into the water tank is further provided on the second accommodation cavity, and the auxiliary drain port is arranged at the top of the second accommodation cavity; A deionized core body, which is arranged in the first accommodation cavity. An inlet is provided at the bottom of the deionized core body, and the inlet is communicated with the main drain port through a pipeline. An outlet is provided on the side wall at the top of the deionized core body.

2. The make-up water tank of a fuel cell system according to claim 1, characterized in that It further comprises a deionized core body cover; The deionized core body cover is arranged at the top end of the deionized core body; A connection hole is provided at the top of the first accommodation cavity, and the connection hole protrudes from the water tank; The diameter of the deionized core body is smaller than the diameter of the connection hole; The deionized core body cover covers the connection hole.

3. The make-up water tank of a fuel cell system according to claim 2, characterized in that The deionized core body cover is detachably connected to the deionized core body.

4. The make-up water tank of a fuel cell system according to claim 1, characterized in that The deionized core body comprises a shell and a bottom cover. The bottom cover is detachably arranged at the bottom of the shell. The inlet is provided on the bottom cover, and the outlet is provided on the side wall of the shell far away from the bottom cover.

5. The make-up water tank of a fuel cell system according to claim 4, characterized in that The deionized core body further comprises a filter screen, which is arranged in the shell. The height of the filter screen from the bottom cover is the same as the height of the bottom end of the outlet from the bottom cover; The area between the bottom cover and the filter screen in the shell is filled with ion adsorption resin.

6. The make-up water tank of a fuel cell system according to any one of claims 1-5, characterized in that The ratio of the cross-sectional area of the deionized core body to the cross-sectional area of the first accommodation cavity ranges from 1 to 1.

2.

7. The make-up water tank of a fuel cell system according to any one of claims 1-5, characterized in that It further comprises a pressure cover; A liquid filling port is provided at the top of the second accommodation cavity, and the liquid filling port protrudes from the water tank. The pressure cover is arranged on the liquid filling port.

8. The make-up water tank of a fuel cell system according to claim 1, characterized in that It further comprises a mounting bracket arranged outside the water tank; One end of the mounting bracket is connected to the water tank, and the other end of the mounting bracket is provided with a connecting portion.

9. A fuel cell system, characterized in that, Comprising the make-up water tank of the fuel cell system according to any one of claims 1-8.

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