Power converter and fuel cell system

Abstract

The utility model provides a power converter and a fuel cell system, the power converter comprises a shell, the shell is provided with an accommodating cavity, and the accommodating cavity is provided with a water flow channel; the water cooling device is arranged in the containing cavity, the water cooling device comprises a cover plate and a water pipe assembly, and the cover plate is laid on the water flow channel; the water pipe assembly is fixedly connected with the cover plate and comprises a first water pipe, a first water nozzle, a second water pipe and a second water nozzle, the first water nozzle is fixedly connected with the first water pipe, the second water nozzle is fixedly connected with the second water pipe, the first water pipe and the second water pipe extend in the first direction, and the first water nozzle and the second water nozzle extend in the second direction; the first water nozzle and the second water nozzle penetrate through one side of the shell and are both used for circulating a heat-conducting medium; the first water pipe and the second water pipe are integrally formed. The first water pipe and the second water pipe are integrally formed, the first water nozzle and the second water nozzle are adjacently arranged on the same side, the number of holes formed in the shell is reduced, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to water cooling and heat dissipation, and in particular to a power converter and a fuel cell system. Background Art

[0002] At present, most power converters use a water-cooling structure, where water is introduced through a nozzle to dissipate heat from the internal heating components of the product; then the water inside the radiator is made to flow out through another nozzle, and the cycle continues in sequence to dissipate heat inside the product. However, it is impossible to transfer the internal water channel of the product to the outside of the product, and the problem of how to transfer the product water channel to the outside of the product needs to be solved. Utility Model Content

[0003] In the first aspect, the present application provides a power converter, comprising a shell, the shell having a receiving cavity, the receiving cavity being provided with a water flow channel; a water cooling device, the water cooling device being arranged in the receiving cavity, the water cooling device comprising a cover plate and a water pipe assembly, the cover plate being laid on the water flow channel; the water pipe assembly is fixedly connected to the cover plate, the water pipe assembly comprises a first water pipe, a first water nozzle, a second water pipe and a second water nozzle, the first water nozzle is fixedly connected to the first water pipe, the second water nozzle is fixedly connected to the second water pipe, the first water pipe and the second water pipe are extended along a first direction, and the first water nozzle and the second water nozzle are extended along a second direction; the first water nozzle and the second water nozzle pass through one side of the shell, and are both used to circulate a heat-conducting medium; wherein, the first water pipe and the second water pipe are integrally formed.

[0004] The cover plate is provided with a first conduit and a second conduit, the first conduit and the second conduit are extended along the first direction, the first conduit and the second conduit are both communicated with the water flow channel, and the first conduit and the second conduit are both fixedly connected to the water pipe assembly.

[0005] Wherein, the first faucet and the first water pipe are integrally formed, and the second faucet and the second water pipe are integrally formed.

[0006] The first conduit and the first water pipe are integrally formed, and the second conduit and the second water pipe are integrally formed.

[0007] The first conduit, the first water pipe and the first faucet are integrally formed, and the second conduit, the second water pipe and the second faucet are integrally formed.

[0008] Wherein, the water pipe assembly includes at least one limiting plate, the limiting plate is arranged on the outer peripheral surface of the first water nozzle and the second water nozzle, and the limiting plate is fixedly connected to the shell.

[0009] In which, the shell has a first side surface and a second side surface, the first side surface and the second side surface are arranged opposite to each other, the first side surface is located in the accommodating cavity, the second side surface is located on the outer peripheral surface of the shell, the limiting plate is arranged on the first side surface and fixedly connected to the shell, or the limiting plate is arranged on the second side surface and fixedly connected to the shell.

[0010] Wherein, the power converter further includes a seal, which is arranged at the connection between the limiting plate and the first side surface or the second side surface, and is used to seal the water pipe assembly and the shell.

[0011] A first sealing ring is provided at the connection between the first water pipe and the first conduit, and a second sealing ring is provided at the connection between the second water pipe and the second conduit. The first sealing ring and the second sealing ring are used to prevent the heat transfer medium from flowing out.

[0012] In a second aspect, the present application also provides a fuel cell system comprising the power converter and the stack assembly of the first aspect.

[0013] In the present application, the first water pipe and the second water pipe are configured to be integrally formed, so that the first water nozzle and the second water nozzle are arranged adjacent to each other on the same side, thereby making the overall structure of the water pipe assembly compact and light, and facilitating installation of the water pipe assembly with the cover plate and the shell, while reducing the opening setting of the shell and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained like these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of a power converter provided by an embodiment of the utility model.

[0016] Figure 2 It is a schematic diagram of the structural decomposition of a power converter according to the first embodiment of the present utility model.

[0017] Figure 3 It is a structural schematic diagram of a water pipe assembly provided in an embodiment of the utility model.

[0018] Figure 4 This utility model embodiment Figure 2 A magnified schematic diagram of the area indicated by B1.

[0019] Figure 5It is a schematic diagram of the structural decomposition of a power converter according to the second embodiment of the present utility model.

[0020] Figure 6 It is a schematic diagram of the structural decomposition of a power converter according to a third embodiment of the present utility model.

[0021] Figure 7 It is a structural schematic diagram of a limit plate provided in an embodiment of the utility model.

[0022] Figure 8 It is a cross-sectional schematic diagram of a power converter according to a third embodiment of the present utility model.

[0023] Fig. 9 The utility model embodiment provides Figure 8 A partial enlarged view of the area indicated by B2.

[0024] Fig.10 It is a cross-sectional schematic diagram of a power converter according to a third embodiment of the present utility model.

[0025] Fig.11 It is a partial structural exploded schematic diagram of a power converter according to a first embodiment of the present utility model.

[0026] Fig.12 It is a structural schematic diagram of a fuel cell system provided by an embodiment of the utility model.

[0027] Fig.13 It is a structural schematic diagram of a fuel cell system provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figures 1 to 3The present application provides a power converter 100, the power converter 100 comprising a housing 10, the housing 10 having a receiving cavity 10a, the receiving cavity 10a being provided with a water channel 13; a water cooling device 20, the water cooling device 20 being arranged in the receiving cavity 10a, the water cooling device 20 comprising a cover plate 30 and a water pipe assembly 40, the cover plate 30 being laid on the water channel 13; the water pipe assembly 40 being fixedly connected to the cover plate 30, the water pipe assembly 40 comprising a first water pipe 41, a first water nozzle 43, a second water nozzle 44, a first water nozzle 45, a second water nozzle 46, a first water nozzle 47, a second water nozzle 48, a first water nozzle 49, a first water nozzle 50, a first water nozzle 51, a first water nozzle 52, a second water nozzle 53, a first water nozzle 54, a first water nozzle 55, a first water nozzle 56, a first water nozzle 57, a first water nozzle 58, a first water nozzle 59, a first water nozzle 50, a first water nozzle 51, a first water nozzle 52 ...3, a first water nozzle 54, a first water nozzle 55, a first water nozzle 56, a first water nozzle 57, a first water nozzle 58, a first water nozzle 59, a first water nozzle 5 The first water nozzle 43 is fixedly connected to the first water pipe 41, and the second water nozzle 44 is fixedly connected to the second water pipe 42. The first water pipe 41 and the second water pipe 42 are extended along the first direction, and the first water nozzle 43 and the second water nozzle 44 are extended along the second direction; the first water nozzle 43 and the second water nozzle 44 pass through one side of the shell 10, and are both used to circulate heat-conducting medium (not shown); wherein, the first water pipe 41 and the second water pipe 42 are integrally formed.

[0030] Specifically, the first direction is the Z direction, and the second direction is the X direction. The material of the shell 10 can be, but is not limited to, metal, alloy or plastic, etc. The shell 10 is composed of a substrate 11 and a plurality of side panels 12, and the plurality of side panels 12 and the substrate 11 enclose the accommodating cavity 10a. The cover plate 30 and the substrate 11 are arranged parallel to each other in the first direction, the water flow channel 13 is arranged on the substrate 11, and the cover plate 30 is laid on the water flow channel 13 to form a circulation area for the heat-conducting medium, and the cover plate 30 is tightly fitted with the water flow channel 13 to prevent the heat-conducting medium from flowing out; wherein, the heat-conducting medium can be, but is not limited to, water, oil or gas, etc. The water cooling device 20 is composed of the cover plate 30 and the water pipe assembly 40, and the water pipe assembly 40 is installed on the cover plate 30 and is fixedly connected and communicated with the cover plate 30 for the heat-conducting medium to flow. It can be understood that the materials of the first water pipe 41 and the second water pipe 42 can be copper, stainless steel, etc.; the first water pipe 41 and the second water pipe 42 include but are not limited to round tubes, square tubes, etc. The materials of the first water nozzle 43 and the second water nozzle 44 can be copper, stainless steel, etc. The copper water nozzle has good thermal conductivity and corrosion resistance, and is often used in high-power, high-heating power supply application scenarios. The stainless steel water nozzle has good strength and corrosion resistance, and is often used in harsh working environments. The first water nozzle 43 and the second water nozzle 44 include but are not limited to round tubes, square tubes, etc. One of the side plates 12 of the housing 10 is provided with a first through hole 12a and a second through hole 12b, the first water nozzle 43 penetrates the first through hole 12a and is connected to the outside, and the second water nozzle 44 penetrates the second through hole 12b and is connected to the outside. The first water pipe 41 is connected to the first water nozzle 43, and the second water pipe 42 is connected to the second water nozzle 44. Optionally, the first water nozzle 43 may be a water inlet, and the second water nozzle 44 may be a water outlet.

[0031] Please continue reading Figure 2 and Figure 3 When the heat-conducting medium enters from the first water nozzle 43 along the second direction and flows to the first water pipe 41, the heat-conducting medium then flows to the water flow channel 13 in the first water pipe 41 along the first direction, and then the heat-conducting medium flows to the second water pipe 42 through the water flow channel 13, and the heat-conducting medium flows to the second water nozzle 44 in the second water pipe 42 along the first direction, and finally flows out from the second water nozzle 44 to the outside along the second direction, so as to realize the heat dissipation of the heat-conducting medium in the water cooling device 20.

[0032] In the present application, the first water pipe 41 and the second water pipe 42 are configured to be integrally formed, so that the first water nozzle 43 and the second water nozzle 44 are arranged adjacent to each other on the same side, thereby making the overall structure of the water pipe assembly 40 compact and light, and facilitating the installation of the water pipe assembly 40 with the cover plate 30 and the shell 10, while reducing the opening setting of the shell 10 and improving the processing efficiency.

[0033] See also Figure 2 In one embodiment, the cover plate 30 is provided with a first conduit 31 and a second conduit 32, the first conduit 31 and the second conduit 32 are extended along the first direction, the first conduit 31 and the second conduit 32 are both connected to the water channel 13, and the first conduit 31 and the second conduit 32 are both fixedly connected to the water pipe assembly 40.

[0034] Specifically, the first conduit 31 and the second conduit 32 are extended along the side facing away from the substrate 11 in the first direction, and the first conduit 31 and the second conduit 32 are made of materials such as aluminum, copper or aluminum alloy, and the first conduit 31 and the second conduit 32 include but are not limited to round tubes, square tubes, etc. The first conduit 31 is coaxially arranged with the first water pipe 41, and the first conduit 31 is fixedly connected with the first water pipe 41, and the inner cavity of the first conduit 31 is communicated with the inner cavity of the first water pipe 41; wherein the connection method of the first conduit 31 and the first water pipe 41 includes but is not limited to screw connection, clamp connection, bonding, etc. The second conduit 32 is coaxially arranged with the second water pipe 42, and the second conduit 32 is fixedly connected with the second water pipe 42, and the inner cavity of the second conduit 32 is communicated with the inner cavity of the second water pipe 42; wherein the connection method of the second conduit 32 and the second water pipe 42 includes but is not limited to screw connection, clamp connection, bonding, etc.

[0035] When the heat-conducting medium enters from the first water nozzle 43 along the second direction and flows to the first water pipe 41, the heat-conducting medium then flows along the first direction in the first water pipe 41 to the first conduit 31, and then flows to the water flow channel 13 through the first conduit 31, and then flows to the second conduit 32 through the water flow channel 13, and then flows to the second water pipe 42 through the second conduit 32, the heat-conducting medium flows along the first direction in the second water pipe 42 to the second water nozzle 44, and finally flows out from the second water nozzle 44 to the outside along the second direction, so as to realize the heat dissipation of the heat-conducting medium in the water cooling device 20.

[0036] In this embodiment, the first conduit 31 and the second conduit 32 are protruded on the side of the cover plate 30 facing away from the base plate 11, and the first water pipe 41 and the second water pipe 42 are aligned and fixedly connected with the first conduit 31 and the second conduit 32 respectively, so that the heat-conducting medium circulates in the water channel 13 to dissipate heat. Such a connection method is conducive to improving the detachability of the water pipe assembly 40, and is convenient for disassembling and assembling the water pipe assembly 40.

[0037] Please also read Figures 2 to 4 In the first embodiment, the first water nozzle 43 is integrally formed with the first water pipe 41 , and the second water nozzle 44 is integrally formed with the second water pipe 42 .

[0038] Specifically, the first water pipe 41 and the second water pipe 42 are integrally formed structures, and the water pipe assembly 40 includes a first connecting portion 45, which is arranged at the connection between the first water pipe 41 and the second water pipe 42, and the first connecting portion 45 makes the first water pipe 41 and the second water pipe 42 integrally connected. The first connecting portion 45 is provided with a first connecting hole 45a, and the first connecting hole 45a penetrates the first connecting portion 45 along the first direction. The first conduit 31 and the second conduit 32 are integrally formed structures, and the cover plate 30 is provided with a second connecting portion 33 on the side facing away from the base plate 11, and the second connecting portion 33 is arranged at the connection between the first conduit 31 and the second conduit 32, and the second connecting portion 33 makes the first conduit 31 and the second conduit 32 integrally connected. Optionally, the first conduit 31 and the second conduit 32 are integrally formed structures with the cover plate 30. The integrally formed structure can improve the sealing performance of the water cooling device and reduce the amount of sealing rings. The second connection portion 33 is provided with a second connection hole 33a, the second connection hole 33a penetrates the second connection portion 33 along the first direction, and the second connection hole 33a is coaxially arranged with the first connection hole 45a. The power converter 100 further includes a fastener 51, the fastener 51 passes through the first connection hole 45a and the second connection hole 33a to fix the first connection portion 45 and the second connection portion 33, and further fixes the first water pipe 41 and the first conduit 31, and the second water pipe 42 and the second conduit 32.

[0039] Since the first water nozzle 43 and the first water pipe 41 are an integrally formed structure, and the second water nozzle 44 and the second water pipe 42 are an integrally formed structure, wherein the first water pipe 41 and the second water pipe 42 are integrally connected through the first connecting portion 45; the water pipe assembly 40 is an integral structure. In this embodiment, the water pipe assembly 40 is formed by the first water nozzle 43, the first water pipe 41, the first connecting portion 45, the second water pipe 42, and the second water nozzle 44 being integrally connected in sequence. When the water pipe assembly 40 needs to be replaced, the water pipe assembly 40 can be directly removed and replaced to improve the installation efficiency. Of course, in other embodiments, the first water pipe 41 and the second water pipe 42 can also be directly fixedly connected to the cover plate 30 or set as an integrally formed structure with the cover plate 30.

[0040] See also Figure 5 In the second embodiment, the first conduit 31 and the first water pipe 41 are integrally formed, and the second conduit 32 and the second water pipe 42 are integrally formed.

[0041] Specifically, the first conduit 31 and the first water pipe 41 are integrally formed into a water inlet portion 61, and the water inlet portion 61 and the cover plate 30 are integrally formed structures. A water inlet hole 61a is provided on the peripheral side surface of the water inlet portion 61 close to the side plate 12, and one end of the first water nozzle 43 is fixedly connected to the water inlet hole 61a, so that the heat-conducting medium flows from the first water nozzle 43 to the water inlet portion 61. Similarly, the second conduit 32 and the second water pipe 42 are integrally formed into a water outlet portion 62, and the water outlet portion 62 and the cover plate 30 are integrally formed structures. A water outlet hole 62a is provided on the peripheral side surface of the water outlet portion close to the side plate 12, and one end of the second water nozzle 44 is fixedly connected to the water outlet hole 62a, so that the heat-conducting medium flows from the water outlet portion 62 to the second water outlet nozzle. Optionally, the water inlet portion 61 and the water outlet portion 62 may also be integrally connected structures.

[0042] In this embodiment, the first conduit 31 and the first water pipe 41 are integrally provided as the water inlet 61, and the second conduit 32 and the second water pipe 42 are provided as the water outlet 62, and the water inlet 61 and the water outlet 62 are respectively provided as an integral structure with the cover plate 30, so as to prevent the heat transfer medium from flowing out at the connection between the first conduit 31 and the first water pipe 41, the connection between the second conduit 32 and the second water pipe 42, the connection between the water inlet 61 and the cover plate 30, and the connection between the water outlet 62 and the cover plate 30, so as to improve the sealing performance of the water cooling device 20. In addition, the first water nozzle 43 is fixedly connected with the water inlet 61 by providing a water inlet hole 61a, and the second water nozzle 44 is fixedly connected with the water outlet 62 by providing a water outlet hole 62a, so that the first water nozzle 43 and / or the second water nozzle 44 can be replaced separately, further improving the convenience of product assembly. Of course, in other embodiments, the water inlet 61 and the water outlet 62 may be respectively fixed to the cover plate 30 by means of snap connection, screw connection, etc., which are all embodiments of the present application and will not be elaborated in this application.

[0043] See also Figure 6 In the third embodiment, the first conduit 31, the first water pipe 41 and the first water nozzle 43 are integrally formed, and the second conduit 32, the second water pipe 42 and the second water nozzle 44 are integrally formed.

[0044] Specifically, the first conduit 31 and the first water pipe 41 are integrally formed into a water inlet 61, and the water inlet 61 is extended and arranged on the side of the cover plate 30 facing away from the base plate 11, and the water inlet 61 and the cover plate 30 are an integrally formed structure; the first water nozzle 43 is provided on the side of the water inlet 61 close to the side plate 12 in the second direction, and the first water nozzle 43 and the water inlet 61 are an integrally formed structure. Similarly, the second conduit 32 and the second water pipe 42 are integrally formed into a water outlet 62, and the water outlet 62 is extended and arranged on the side of the cover plate 30 facing away from the base plate 11, and the water outlet 62 and the cover plate 30 are an integrally formed structure; the second water nozzle 44 is provided on the side of the water outlet 62 close to the side plate 12 in the second direction, and the second water nozzle 44 and the water outlet 62 are an integrally formed structure. Optionally, the third connection portion may be further provided between the water outlet portion 62 and the water inlet portion 61 , and the third connection portion may increase the connection strength between the water inlet portion 61 and the water outlet portion 62 , thereby improving the structural stability of the water pipe assembly 40 .

[0045] In this embodiment, the first conduit 31 and the first water pipe 41 are firstly integrated as the water inlet 61, and the second conduit 32 and the second water pipe 42 are firstly integrated as the water outlet 62. The water inlet 61 and the water outlet 62 are then respectively integrated with the cover plate 30 to prevent the heat transfer medium from flowing out at the connection between the first conduit 31 and the first water pipe 41, the connection between the second conduit 32 and the second water pipe 42, the connection between the water inlet 61 and the cover plate 30, and the connection between the water outlet 62 and the cover plate 30, so as to improve the sealing performance of the water cooling device 20. Furthermore, by configuring the first water nozzle 43 and the water inlet 61 as an integrated structure, and configuring the second water nozzle 44 and the water outlet 62 as an integrated structure, the first water nozzle 43 and the second water nozzle 44 can reduce the loss of heat transfer and improve the heat dissipation efficiency; can reduce the complexity of installation and maintenance, and be more concise and convenient; can also ensure the stability and sealing of the connection, and be more durable.

[0046] Please also read Figures 5 to 7 In one embodiment, the water pipe assembly 40 includes at least one limiting plate 70 , and the limiting plate 70 is disposed on the outer circumference of the first water nozzle 43 and the second water nozzle 44 , and the limiting plate 70 is fixedly connected to the shell 10 .

[0047] Specifically, the limiting plate 70 includes but is not limited to a faucet flange, and the limiting plate 70 is used to fix the first faucet 43 and the second faucet 44 on the side plate 12 of the housing 10. The limiting plate 70 may be made of, but is not limited to, aluminum, copper, stainless steel and other materials. The limiting plate 70 includes but is not limited to a rectangular shape and a circular shape. The limiting plate 70 is provided with a first limiting hole 70a and a second limiting hole 70b in the second direction, the first faucet 43 passes through the first limiting plate 70 hole, and the second faucet 44 passes through the second limiting hole 70b. The outer peripheral surface of the first faucet 43 is in clearance with the first limiting hole 70a, and the outer peripheral surface of the second faucet 44 is in clearance with the second limiting hole 70b. Among them, the first limiting hole 70a is coaxially arranged with the first through hole 12a, and the second limiting hole 70b is coaxially arranged with the second through hole 12b. The limiting plate 70 is spaced apart from the first water pipe 41 and the second water pipe 42 in the second direction, and the limiting plate 70 abuts against the side plate 12. The limiting plate 70 can be installed on the side plate 12 by bonding, screwing, clamping, etc. Optionally, the limiting plate 70 can also be integrally formed with the first water nozzle 43 and the second water nozzle 44.

[0048] In this embodiment, the limit plate 70 is provided in the water pipe assembly 40, and the limit plate 70 is respectively connected to the first water nozzle 43 and the second water nozzle 44, and the limit plate 70 is fixedly connected to the side plate 12 of the shell 10, thereby achieving the first water nozzle 43 and the second water nozzle 44 being able to be stably installed on the shell 10.

[0049] See also Figure 8 and Fig. 9 In one embodiment, the shell 10 has a first side surface 121 and a second side surface 122, the first side surface 121 and the second side surface 122 are arranged opposite to each other, the first side surface 121 is located in the accommodating cavity 10a, and the second side surface 122 is located on the outer peripheral surface of the shell 10, and the limiting plate 70 is arranged on the first side surface 121 and fixedly connected to the shell 10, or the limiting plate 70 is arranged on the second side surface 122 and fixedly connected to the shell 10.

[0050] Specifically, the side plate 12 of the housing 10 has a first side surface 121 and a second side surface 122, and the first side surface 121 and the second side surface 122 are arranged opposite to each other along the second direction. It can be understood that the first side surface 121 is a side of the side plate 12 located at the receiving cavity 10a, and the second side surface 122 is a side surface of the side plate 12 located at the outer peripheral surface of the housing 10.

[0051] See also Figure 2 and Fig. 9 When the water pipe assembly 40 is the first embodiment, that is, the water pipe assembly 40 and the cover plate 30 are in a detachable connection relationship, the water pipe assembly 40 needs to be disassembled and assembled in the receiving cavity 10a during installation. At this time, the limiting plate 70 is arranged on the first side surface 121 to achieve the upper limit of the first water nozzle 43, the second water nozzle 44, the first water pipe 41 and the second water pipe 42 in the second direction on the side plate 12 by the limiting plate 70. This makes it easier for the staff to disassemble and assemble the water cooling device 20 on the power converter 100.

[0052] See also Figure 5 and Fig.10 When the water pipe assembly 40 is the third embodiment described above, that is, the water pipe assembly 40 and the cover plate 30 are integrally arranged, the assembly and disassembly of the water pipe assembly 40 and the cover plate 30 need to be completed in the accommodating cavity 10a. At this time, the limiting plate 70 is arranged on the first side surface 121 to achieve that the limiting plate 70 limits the first water nozzle 43, the second water nozzle 44, the first water pipe 41 and the second water pipe 42 to the upper limit of the second direction on the side plate 12.

[0053] See also Figure 6 and Fig. 9 When the water pipe assembly 40 is the second embodiment, the first water nozzle 43 and the second water nozzle 44 are in a disassembly relationship with the first water pipe 41 and the second water pipe 42. When the first water nozzle 43 and the second water nozzle 44 need to be replaced, the limit plate 70 can be set on the second side surface 122 and fixedly connected to the side plate 12. The staff does not need to operate in the receiving cavity 10a, and can directly perform disassembly and assembly work on the outer peripheral surface of the housing 10, thereby improving work efficiency.

[0054] See also Fig.10 and Fig.11 In one embodiment, the power converter 100 further includes a seal 81 , which is disposed at a connection between the limiting plate 70 and the first side surface 121 or the second side surface 122 , and is used to seal the water pipe assembly 40 and the shell 10 .

[0055] Specifically, the sealing member 81 includes but is not limited to materials such as rubber or silicone, and has good elasticity and sealing performance. When the limiting plate 70 is arranged in the receiving cavity 10a, the limiting plate 70 is fixedly connected to the first side 121. A limiting groove 71 is provided on the side of the limiting plate 70 that is in contact with the first side 121, and the sealing member 81 is fixed in the limiting groove 71. When installing, the sealing member 81 needs to be installed in the limiting groove 71, and then the limiting plate 70 is fixedly connected to the first side 121 of the side plate 12. When the limiting plate 70 is arranged on the outer peripheral surface of the shell 10, the limiting plate 70 is fixedly connected to the second side 122. A limiting groove 71 is provided on the side of the limiting plate 70 that is in contact with the second side 122, and the sealing member 81 is fixed in the limiting groove 71. When installing, the sealing member 81 needs to be installed in the limiting groove 71, and then the limiting plate 70 is fixedly connected to the second side 122 of the side plate 12. The sealing member 81 prevents leakage of the heat transfer medium and ensures the sealing performance of the heat transfer medium.

[0056] See also Fig.11 In one embodiment, a first sealing ring 82 is provided at the connection between the first water pipe 41 and the first conduit 31, and a second sealing ring 83 is provided at the connection between the second water pipe 42 and the second conduit 32. The first sealing ring 82 and the second sealing ring 83 are used to prevent the heat transfer medium from flowing out.

[0057] Specifically, the first sealing ring 82 and the second sealing ring 83 are made of materials including but not limited to rubber or silicone, and have good elasticity and sealing performance. Optionally, a first sealing groove 72 is provided on the side where the first conduit 31 is connected to the first water pipe 41, and the first sealing ring 82 is fixed in the first sealing groove 72; a second sealing groove 73 is provided on the side where the second conduit 32 is connected to the second water pipe 42, and the second sealing ring 83 is fixed in the second sealing groove 73. When the water pipe assembly 40 is the first embodiment described above, that is, the water pipe assembly 40 and the cover plate 30 are in a detachable connection relationship, in order to prevent the heat transfer medium from flowing out, the first sealing ring 82 and the second sealing ring 83 are respectively provided at the connection between the water pipe assembly 40 and the first conduit 31 and the second conduit 32. Of course, in other embodiments, the first sealing groove 72 can also be provided on the side where the first water pipe 41 is connected to the first conduit 31, and the second sealing groove 73 can also be provided on the side where the second water pipe 42 is connected to the second conduit 32.

[0058] See also Fig.12 and Fig.13The present application also provides a fuel cell system 300, including the power converter 100 and a stack assembly, wherein the stack assembly 200 is used to provide a current signal in the fuel cell system 300. The power converter 100 also includes a first interface 15, a second interface 16, a third interface 17 and a fourth interface 18, wherein the first interface 15, the second interface 16, the third interface 17 and the fourth interface 18 are arranged on the peripheral side of the shell, wherein the first interface 15 may be but is not limited to a low-voltage control interface, wherein the first interface 15 is used to control the output voltage of the power converter 100. The second interface 16 may be but is not limited to an air compressor controller output interface, wherein the second interface 16 is used to connect an air compressor (not shown) and control and monitor the air compressor. The third interface 17 may be but is not limited to a PTC / water pump output interface, wherein the third interface 17 is used to connect a PTC (positive temperature coefficient) heating element (not shown) and an interface of a water pump. The fourth interface 18 may be but is not limited to a main output interface of the power converter 100, wherein the fourth interface 18 is used to output the current and voltage of the power converter. The power converter 100 also includes at least one sealing plug 19, which is arranged on the same surface as the third interface 17 and the fourth interface 18. The sealing plug 19 is used to ensure the sealing of the connection between the power converter 100 and the stack assembly 200. It can be understood that the sealing plug 19 is usually required to prevent gas, liquid and other substances from leaking from the connection between the power converter 100 and the stack assembly 200. The sealing plug 19 can be made of, but not limited to, materials such as metal or plastic, and has good sealing performance and corrosion resistance. The stack assembly 200 can be used to transmit current signals to the power converter 100 and drive the operation of the power converter 100. The stack assembly 200 can be, but not limited to, stacked with the power converter 100. In the schematic diagram provided in this embodiment, the stack assembly 200 and the power converter 100 are stacked as an example, and the stack assembly 200 and the power converter 100 are stacked, which can effectively improve the space utilization efficiency of the fuel cell system 300.

[0059] The embodiments of the present invention are described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A power converter, It is characterized in that include: A shell, wherein the shell has a receiving cavity, and the receiving cavity is provided with a water flow channel; A water cooling device, the water cooling device is arranged in the receiving cavity, the water cooling device includes a cover plate and a water pipe assembly, the cover plate is laid on the water flow channel; the water pipe assembly is fixedly connected to the cover plate, the water pipe assembly includes a first water pipe, a first water nozzle, a second water pipe and a second water nozzle, the first water nozzle is fixedly connected to the first water pipe, the second water nozzle is fixedly connected to the second water pipe, the first water pipe and the second water pipe are extended along a first direction, and the first water nozzle and the second water nozzle are extended along a second direction; the first water nozzle and the second water nozzle pass through one side of the shell, and are both used to circulate heat-conducting medium; wherein, the first water pipe and the second water pipe are integrally formed.

2. The power converter according to claim 1, It is characterized in that The cover plate is provided with a first conduit and a second conduit, the first conduit and the second conduit are extended along the first direction, the first conduit and the second conduit are both communicated with the water flow channel, and the first conduit and the second conduit are both fixedly connected to the water pipe assembly.

3. The power converter according to claim 2, It is characterized in that The first water nozzle and the first water pipe are integrally formed, and the second water nozzle and the second water pipe are integrally formed.

4. The power converter according to claim 2, It is characterized in that The first conduit is integrally formed with the first water pipe, and the second conduit is integrally formed with the second water pipe.

5. The power converter according to claim 2, It is characterized in that The first conduit, the first water pipe and the first faucet are integrally formed, and the second conduit, the second water pipe and the second faucet are integrally formed.

6. The power converter according to any one of claims 3 to 5, It is characterized in that The water pipe assembly includes at least one limiting plate, which is arranged on the outer peripheral surfaces of the first water nozzle and the second water nozzle, and the limiting plate is fixedly connected to the shell.

7. The power converter according to claim 6, It is characterized in that The shell has a first side surface and a second side surface, the first side surface and the second side surface are arranged opposite to each other, the first side surface is located in the accommodating cavity, and the second side surface is located on the outer peripheral surface of the shell, the limiting plate is arranged on the first side surface and fixedly connected to the shell, or the limiting plate is arranged on the second side surface and fixedly connected to the shell.

8. The power converter according to claim 7, It is characterized in that The power converter further includes a seal, which is disposed at a connection between the limiting plate and the first side surface or the second side surface, and is used for sealing the water pipe assembly and the housing.

9. The power converter according to claim 2, It is characterized in that A first sealing ring is provided at the connection between the first water pipe and the first conduit, and a second sealing ring is provided at the connection between the second water pipe and the second conduit. The first sealing ring and the second sealing ring are used to prevent the heat transfer medium from flowing out.

10. A fuel cell system, It is characterized in that The fuel cell system comprises the power converter and the fuel cell stack assembly as described in any one of claims 1-9.

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