Fuel cell coolant deionizer

Abstract

The application provides a fuel cell coolant deionizer, and belongs to the technical field of fuel cells, which solves the problem of low resin utilization rate and poor vibration resistance in the prior art. The device comprises a deionization shell, a water distribution device, resin and an outlet support framework arranged in sequence along the flow direction of the coolant in the shell. The deionization shell is provided with a coolant input port on one side and a coolant output port on the other side. The water distribution device is arranged at the coolant input port and is used for uniformly distributing the coolant entering the deionizer to the entire area of the resin. The outlet support framework is arranged at the coolant output port and comprises a support member provided with a liquid output pipeline in the middle, which is used for supporting the resin to prevent the deformation of the resin. The periphery of the water distribution device, the resin and the outlet support framework is in sealed contact with the deionization shell. The device can distribute the coolant through the water distribution device, improve the utilization rate of the resin and prevent the loosening of the resin.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cells, in particular to a fuel cell cooling liquid deionizer. BACKGROUND

[0002] During operation, fuel cells continuously generate heat due to the existence of activation voltage loss, ohmic voltage loss and concentration voltage loss, and the working temperature of fuel cells is 60-80℃. The continuously generated heat will cause the fuel cells to overheat. The existing heat dissipation system mainly dissipates heat through circulating cooling liquid, and the ion content in the cooling liquid is crucial for the stable operation of the fuel cell. However, during operation, the air compressor, intercooler and other components in the BOP assembly will continuously precipitate ions into the cooling liquid. As the ion content in the cooling liquid continuously increases, the electrical conductivity of the cooling liquid will gradually increase, and the fuel cell has the risk of electric leakage, and too high electrical conductivity may cause the fuel cell bipolar plate to be punctured, and a deionizer needs to be installed.

[0003] The existing deionizer does not reasonably distribute the cooling liquid passing through the resin, resulting in inconsistent use of the resin at different parts, and there is a situation of low utilization rate of the resin, so the service life of the deionizer is short and the use cost is high. Moreover, the deionizer is prone to loose resin when subjected to vibration, which destroys the original structure of the resin. SUMMARY

[0004] In view of the above analysis, the embodiments of the present application aim to provide a fuel cell cooling liquid deionizer to solve the problem of low resin utilization rate and poor resistance to vibration in the prior art.

[0005] In one aspect, the embodiments of the present application provide a fuel cell cooling liquid deionizer, comprising a deionization shell, and a water distribution device, a resin and an outlet support framework arranged in the deionization shell in sequence along the flow direction of the cooling liquid; wherein,

[0006] The deionization shell adopts a hollow shell structure, one side of which is provided with a cooling liquid input port, and the other side is provided with a cooling liquid output port;

[0007] The water distribution device is arranged at the cooling liquid input port, for uniformly flowing the cooling liquid entering the deionizer to all areas of the resin;

[0008] The outlet support framework is arranged at the cooling liquid output port, and adopts a support member with a liquid output pipeline in the middle, for providing support for the resin to prevent deformation of the resin;

[0009] The periphery of the water distribution device, the resin and the outlet support framework are in sealed contact with the deionization shell.

[0010] The beneficial effects of the above technical solutions are as follows: the ions in the cooling liquid are adsorbed when passing through the resin, the water distribution device is arranged at the cooling liquid input port of the deionizer, the cooling liquid passes through almost the entire area of the resin, the utilization rate of the resin in the deionizer is improved, and the service life of the deionizer is increased, thereby reducing the use cost of enterprises; the outlet support framework is arranged at the cooling liquid output port of the deionizer, which can provide support for the resin and effectively prevent the resin from loosening during use of the deionizer. Through the design of the above structure, compared with the prior art, the volume of the deionizer is reduced, the occupied space of the deionizer is reduced, and the user experience is improved.

[0011] Based on the further improvement of the above device, the water distribution device further comprises a water distribution section, a water baffle, a first water distribution plate and a second water distribution plate connected in sequence; wherein,

[0012] The water distribution section is provided with two or more output units of the same size and equal interval;

[0013] The water baffle is used to filter impurities in the cooling liquid, and the center of the water baffle is arranged on the central axis of the deionizer together with the centers of the cooling liquid input port and the cooling liquid output port;

[0014] The first water distribution plate is partially provided with a grid structure, and the structure is symmetrical;

[0015] The second water distribution plate is entirely provided with a grid structure.

[0016] Further, the water distribution device further comprises a compression spring and a hollow bolt; wherein,

[0017] The compression spring is sleeved on the inside of the hollow bolt;

[0018] One end of the hollow bolt is provided with an external thread, and the other end is provided with a connecting end portion for clamping the water distribution section, and the external thread is threadedly connected with an internal thread arranged at the cooling liquid input port of the deionizer shell.

[0019] Further, the deionizer shell further comprises an upper shell and a lower shell; wherein,

[0020] The upper shell is provided with an outwardly convex end cover structure, and the center of the end cover is provided with a cooling liquid input port, and the cooling liquid input port is further provided with an insertion structure which can be partially inserted into the hollow bolt; the connecting portion of the upper shell and the lower shell is provided with an internal thread;

[0021] One side of the lower shell is provided with an opening for placing the resin, and the other side is provided with an outwardly convex end cover structure and a cooling liquid output port.

[0022] Further, the water distribution joint is arranged on the inner side of the upper shell and is connected with the water baffle, the first water distribution plate and the second water distribution plate by buckling.

[0023] Further, the size of the compression spring is determined by the following formula:

[0024] F 树脂 = P c × S - (G × d 2 ) / (8D 2 × n) × AL

[0025] In the formula, F 树脂 is the rated pre-tightening force of the resin, P c is the fluid pressure in the pipeline at the cooling liquid input port, S is the area of the water baffle, G is the shear modulus of the spring material, d is the diameter of the spring wire, D is the diameter of the spring, n is the effective number of turns of the spring, and AL is the maximum compression of the spring.

[0026] Further, a drain port is arranged on the lower side of the cooling liquid input port of the deionization shell for removing impurities in the deionization device.

[0027] Further, the deionization device further comprises:

[0028] A first filter screen is integrated at the cooling liquid input port of the deionization shell, and micrometer-sized holes are arranged on the filter screen for filtering impurities at the cooling liquid input port.

[0029] Further, a plurality of through holes are arranged in the resin, and each through hole is uniformly distributed along the flow direction of the cooling liquid.

[0030] Further, a second filter screen is arranged at the connection between the resin and the outlet support framework, and the second filter screen is connected to the outlet support framework.

[0031] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0032] 1. By arranging the compression spring and the hollow bolt in the water distribution device, a clamping mechanism is added, and when the deionization device is working, a force in the same direction as the flow direction of the cooling liquid is generated, which tightens the resin and effectively prevents the resin from loosening due to vibration during use of the deionization device. When there is no cooling liquid flowing through, the water distribution device returns to the original position under the action of the spring force, and the resin structure is not damaged.

[0033] 2. The required pre-tightening force of the resin can be determined by experiment according to the minimum anti-vibration requirement, as the rated pre-tightening force of the resin, and the size of the compression spring is further optimized, so that the deionization device meets the set anti-vibration requirement.

[0034] 3, the water distribution device has two functions of water distribution and clamping, which reduces the volume of the added mechanism and reduces the space occupation of the deionizer.

[0035] The summary is provided to introduce a selection of concepts in a simplified form, which will be further described below in the detailed description. The summary is not intended to identify key or essential features of the disclosure, nor is it intended to limit the scope of the disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0036] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the different views of the drawings.

[0037] Figure 1 A schematic diagram of the composition of the deionizer of Example 1 is shown;

[0038] Figure 2 A schematic diagram of the composition of the deionizer of Example 2 is shown;

[0039] Figure 3 A schematic diagram of the structure of the water distribution device of Example 2 is shown;

[0040] Figure 4 A schematic diagram of the important connection parts of the deionizer of Example 2 is shown;

[0041] Figure 5 A left view of the appearance example of the deionizer of Example 2 is shown;

[0042] Figure 6 A front view of the appearance example of the deionizer of Example 2 is shown;

[0043] Figure 7 A right view of the appearance example of the deionizer of Example 2 is shown.

[0044] REFERENCE NUMERALS:

[0045] 1 - deionization shell; 2 - water distribution device; 3 - resin; 4 - outlet support framework; 5 - cooling liquid input port; 6 - cooling liquid output port; 7 - water distribution section; 8 - water baffle; 9 - first water distribution plate; 10 - second water distribution plate; 11 - compression spring; 12 - hollow bolt; 13 - upper shell; 14 - lower shell; 15 - threaded connection part of the upper shell and the lower shell; 16 - part where the water distribution section and the water baffle, the first water distribution plate and the second water distribution plate are connected by buckles; 17 - threaded connection part of the hollow bolt and the upper shell. DETAILED DESCRIPTION

[0046] Embodiments of the present disclosure will be described below in greater detail with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0047] The term "comprising" and variations thereof as used herein are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Unless otherwise expressly stated, the term "or" refers to an inclusive "or" and not to an exclusive "or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "an example embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "a first", "a second", etc. can refer to different or the same objects. Other explicit or implicit definitions can also be included below.

[0048] Embodiment 1

[0049] One embodiment of the present application discloses a fuel cell coolant deionizer, as shown in the figure, comprising a deionization housing 1, and a water distribution device 2, a resin 3, and an outlet support frame 4 arranged in sequence along the flow direction of the coolant in the deionization housing 1. Figure 1

[0050] The deionization housing 1 adopts a hollow housing structure, one side of which is provided with a coolant input port 5, and the other side of which is provided with a coolant output port 6. Alternatively, the deionization housing 1 can adopt a pipe structure with closed ends and a circular, square, rectangular, or polygonal cross-section.

[0051] The water distribution device 2 is arranged at the above-mentioned coolant input port 5, and is used to uniformly distribute the coolant entering the deionizer to the entire area of the resin 3, i.e. to achieve the function of distribution, and has a coolant discharge end that uniformly distributes the coolant to the entire area of the resin 3. In addition to the structure described in Embodiment 2, the water distribution device 2 can also refer to patent CN201621377839.8, which is arranged to include a water collector, a distribution pipe, and a water distribution hole, the distribution pipe is arranged in a ring around the water collector at a certain interval, and a plurality of water distribution holes are arranged on the surface of the distribution pipe at a certain interval. In addition, other forms of water distribution device structure with distribution function can also be used, which can be understood by those skilled in the art.

[0052] The outlet support frame 4 is arranged at the above-mentioned coolant output port, and adopts a support member with a liquid output pipe in the middle, which is used to provide support for the resin 3 to prevent the resin 3 from deforming. The output end of the liquid output pipe is sealingly connected to the coolant output port 6 of the deionization housing 1.

[0053] ​The peripheral of the water distribution device 2, the resin 3 and the outlet support framework 4 are in sealed contact with the deionization shell 1 and are integrated as a whole.

[0054] The deionization device is applicable to any existing fuel cell engine.

[0055] Compared with the prior art, the deionization device provided by the embodiment can adsorb ions in the cooling liquid when the ions pass through the resin 3. The water distribution device 2 is arranged at the cooling liquid input port 5 of the deionization device, so that the cooling liquid passes through almost the entire area of the resin 3, thereby improving the utilization rate of the resin 3 in the deionization device and increasing the service life of the deionization device and reducing the use cost of enterprises. The outlet support framework 4 is arranged at the cooling liquid output port 6 of the deionization device, which can provide support for the resin 3 and effectively prevent the resin 3 from loosening when the deionization device is in use. Through the design of the above structure, compared with the prior art, the volume of the deionization device is reduced, the occupied space of the deionization device is reduced, and the user experience is improved.

[0056] Embodiment 2

[0057] On the basis of embodiment 1, the water distribution device 2 further comprises a water distribution section 7, a water baffle 8, a first water distribution plate 9 and a second water distribution plate 10 connected in sequence, as shown in Figures 2-3 , but not limited to Figure 2 the structure shown.

[0058] The water distribution section 7 is provided with two or more output units of the same size and equal interval for preliminary distribution.

[0059] The water baffle 8 is arranged after the water distribution section 7 and is used to filter impurities in the cooling liquid. The center of the water baffle 8, the center of the cooling liquid input port 5 and the center of the cooling liquid output port 6 are all arranged on the central axis of the deionization device. When the cooling liquid flows through the water baffle 8, a force in the same direction as the flow direction of the cooling liquid is generated and applied to the resin 3, thereby reducing the loosening of the resin 3 when the deionization device is in use.

[0060] The first water distribution plate 9 is partially provided with a grid structure and is symmetrical, which is used to redistribute the cooling liquid after preliminary distribution.

[0061] The second water distribution plate 10 is entirely provided with a grid structure, which is used to uniformly discharge the redistributed cooling liquid into the resin 3.

[0062] Preferably, the water distribution device 2 further comprises a compression spring 11 and a hollow bolt 12.

[0063] The compression spring 11 is sleeved on the inner side of the hollow bolt 12.

[0064] One end of the hollow bolt 12 is provided with external thread, and is screwed with the internal thread provided at the cooling liquid input port 5 of the deionization shell 1, as shown in Figure 4 The other end is provided with the connecting end of the water distribution joint 7.

[0065] The water distribution device 2 has two functions of cooling liquid distribution and resin compression. The compression spring 11 in the water distribution device 2 generates force in the same direction as the cooling liquid when the cooling liquid flows through the water distribution device 2, so as to compress the resin 3 and prevent the resin 3 from loosening. When the deionization device is not working, the resin 3 will not be compressed, so as to prevent the structure of the resin 3 from being damaged.

[0066] Preferably, the deionization shell 1 further comprises an upper shell 13 and a lower shell 14.

[0067] The upper shell 13 has a convex end cover structure, and the center of the end cover is provided with the cooling liquid input port 5 which is also provided with an insertion structure capable of partially inserting the hollow bolt 12. The connecting part between the upper shell 13 and the lower shell 14 is provided with internal thread, and the thread connection between the upper shell 13 and the lower shell 14 is realized through the internal thread. The thread connection part 15 between the upper shell and the lower shell is shown in Figure 4 .

[0068] One side of the lower shell 14 is provided with an opening for inserting the resin 3, and the opening is also provided with external thread which is used in cooperation with the internal thread of the upper shell 13. The other side has a convex end cover structure and is provided with a cooling liquid output port 6.

[0069] Preferably, the water distribution joint 7 is arranged on the inner side of the upper shell 13, and is connected with the water baffle 8, the first water distribution plate 9 and the second water distribution plate 10 through buckling.

[0070] Preferably, the water baffle 8, the first water distribution plate 9 and the second water distribution plate 10 are arranged on the inner side of the water distribution joint 7, and are provided with clamping mechanism element A on the outer contour, and are clamped with clamping mechanism element B arranged on the inner contour of the water distribution joint 7. The buckling connection part 16 between the water distribution joint and the water baffle, the first water distribution plate and the second water distribution plate is shown in Figure 4 .

[0071] Preferably, the size of the compression spring 11 (i.e. the diameter d of the spring wire, the spring diameter D and the effective number of turns n of the spring) can be determined by the following formula:

[0072] F 树脂 = P c × S - (G × d 2 ) / (8D 2 × n) × ΔL

[0073] In the formula, F 树脂P is the rated pre-tightening force received by the resin 3 c S is the area of the baffle 8, G is the shear modulus of the spring material, d is the diameter of the spring wire, D is the mean diameter of the spring (the average diameter of the spring), n is the effective number of turns of the spring (the effective number of turns of the spring refers to the number of turns of the spring that can maintain the same pitch), and ΔL is the maximum compression of the spring (the length value of the spring when compressed to full engagement).

[0074] Preferably, a drain port is formed on the lower side of the coolant input port 5 of the deionization housing 1, for removing impurities in the deionizer.

[0075] Preferably, the deionizer further comprises a first filter screen and a second filter screen.

[0076] The first filter screen is integrated at the coolant input port 5 of the deionization housing 1, and micrometer-sized holes are formed in the filter screen for filtering impurities at the coolant input port 5.

[0077] The second filter screen is arranged at the connection between the resin 3 and the outlet support framework 4, and is integrated on the outlet support framework 4.

[0078] Preferably, a plurality of through holes are arranged in the resin 3, and each through hole is uniformly distributed along the flow direction of the coolant.

[0079] The appearance of the deionizer is as shown in Figures 5-7 .

[0080] When in use, the water distribution device 2 generates a force in the same direction as the flow of the coolant when the coolant flows through the water distribution device 2, and the force presses the resin 3, preventing the resin 3 from loosening. When no coolant flows through, the water distribution device 2 returns to the original position under the action of the spring force, and the structure of the resin 3 is not damaged. Furthermore, when the deionizer is in operation, the incoming coolant is reasonably distributed, so that the resin 3 is fully contacted with the coolant, and the utilization rate of the resin 3 is improved.

[0081] Compared with the prior art, the fuel cell coolant deionizer provided by the embodiment has the following beneficial effects:

[0082] 1. By arranging the pressing spring 11 and the hollow bolt 12 in the water distribution device 2, a clamping mechanism is equivalent to being added, and when the deionizer is in operation, a force in the same direction as the flow direction of the coolant is generated, which tightens the resin 3, effectively preventing the resin 3 from loosening due to vibration during use. When no coolant flows through, the water distribution device 2 returns to the original position under the action of the spring force, and the structure of the resin 3 is not damaged.

[0083] 2. According to the minimum anti-vibration requirement, the required pre-tightening force of the resin 3 can be determined through test, as the rated pre-tightening force of the resin 3, and the size of the compression spring 11 is further optimized, so that the deionizer meets the set anti-vibration requirement.

[0084] 3. The water distribution device 2 has the functions of water distribution and clamping, which reduces the volume of the added mechanism and the space occupation of the deionizer.

[0085] 4. The influence of cold energy utilization on the fuel cell cooling system is solved, the air temperature change caused by the cold energy fluctuation is reduced, the temperature control precision and durability of the heat dissipation system are improved, and the influence of the cold energy on the fuel cell system is minimized.

[0086] The above has described the embodiments of the present disclosure, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical application or improvement of the prior art of the embodiments, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. A fuel cell coolant deionizer, characterized in that, It includes a deionization shell (1), and a water separator (2), resin (3), and an outlet support frame (4) arranged sequentially along the coolant flow direction inside the deionization shell (1); wherein, The deionized shell (1) adopts a hollow shell structure, with a coolant inlet port (5) on one side and a coolant outlet port (6) on the other side. The water separation device (2) is located at the above-mentioned coolant inlet port (5) to ensure that the coolant entering the deionizer flows evenly to the entire area of ​​the resin (3); The outlet support frame (4) is located at the above-mentioned coolant outlet port. It is a support member with a liquid outlet pipe in the middle, which is used to provide support for the resin (3) and prevent the resin (3) from deforming. The periphery of the water separator (2), resin (3), and outlet support frame (4) are all in sealed contact with the deionization shell (1); The water distribution device (2) further includes a water distribution section (7), a baffle plate (8), a first water distribution plate (9), and a second water distribution plate (10) connected in sequence; wherein, The water distribution section (7) is equipped with two or more output units of the same size and equal spacing; The baffle plate (8) is used to filter impurities in the coolant, and its center is located on the central axis of the deionizer, along with the center of the coolant inlet port (5) and the coolant outlet port (6). The first water-dividing plate (9) has a local grid structure, and the structure is symmetrical; The second water distribution plate (10) is entirely composed of a grid structure; The water distribution device (2) further includes a compression spring (11) and a hollow bolt (12); wherein, The compression spring (11) is sleeved on the inside of the hollow bolt (12); One end of the hollow bolt (12) is provided with an external thread, and is threaded to the internal thread provided at the coolant inlet port (5) of the deionized shell (1) through the external thread, and the other end is provided with a connecting end for snapping the water divider (7); The fuel cell coolant deionizer also includes a first filter screen, which is integrated into the coolant inlet port (5) of the deionization housing (1). The filter screen has micron-sized pores for filtering impurities at the coolant inlet port (5). The resin (3) has multiple through holes inside, and each through hole is evenly distributed along the flow direction of the coolant.

2. The fuel cell coolant deionizer according to claim 1, characterized in that, The deionized housing (1) further includes an upper housing (13) and a lower housing (14); wherein, The upper housing (13) adopts an outwardly convex end cap structure, and a coolant inlet port (5) is provided in the center of the end cap. The coolant inlet port (5) is also provided with an insertion structure for partially inserting hollow bolts (12); the connection part between the upper housing (13) and the lower housing (14) is provided with internal threads. The lower housing (14) has an opening for inserting resin (3) on one side, and an external thread that mates with the internal thread of the upper housing (13) at the opening. The other side has a protruding end cap structure and a coolant output port (6).

3. The fuel cell coolant deionizer according to claim 2, characterized in that, The water divider (7) is located on the inner side of the upper shell (13), and it is connected to the baffle plate (8), the first water divider plate (9) and the second water divider plate (10) by snap-fit.

4. The fuel cell coolant deionizer according to any one of claims 1-3, characterized in that, The coolant inlet port (5) of the deionization housing (1) is provided with a drain outlet on the lower side for removing impurities from the deionizer.

5. The fuel cell coolant deionizer according to claim 1, characterized in that, A second filter screen is provided at the connection between the resin (3) and the outlet support frame (4); and the second filter screen is connected to the outlet support frame (4).

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