CN220985534U - DC-DC assembly and fuel cell system - Google Patents

Abstract

The application provides a DC-DC assembly and a fuel cell system. The DC-DC assembly includes a housing, a power module, and an inductance assembly. The shell is surrounded to form a containing cavity; the power module is used for receiving the first voltage signal and outputting a second voltage signal, and the voltage value of the second voltage signal is larger than or smaller than that of the first voltage signal; the inductance component is accommodated in the accommodating cavity and comprises an inductance main body and a first circuit board, the inductance main body is electrically connected to the power module and used for filtering the second voltage signal, the inductance main body is provided with an input end and an output end, and the first circuit board is arranged between the input end and the output end and shields and isolates the input end and the output end, so that electromagnetic interference of the DC-DC component is restrained, and safety and reliability of the DC-DC component and the fuel cell system are improved.

Description

DC-DC assembly and fuel cell system

Technical Field

The present disclosure relates to fuel cell technologies, and in particular, to a DC-DC assembly and a fuel cell system.

Background

With the continuous development of hydrogen fuel cell technology, the current working power of hydrogen fuel cell vehicles and hydrogen fuel cell systems is increasing, and the current corresponding to power transmission is also increasing.

However, as the complexity of the control of the hydrogen fuel cell system increases, if the entire control system is subjected to electromagnetic interference, there is a very high risk to the operation of the hydrogen fuel cell vehicle and the hydrogen fuel cell system, and in severe cases, the entire hydrogen fuel cell system may not be operated.

Disclosure of utility model

In view of this, the present application provides a DC-DC assembly and a fuel cell system, thereby reducing electromagnetic interference to which the fuel cell system is subjected.

In a first aspect, the present application provides a DC-DC assembly comprising:

the shell is surrounded to form a containing cavity;

The power module is accommodated in the accommodating cavity, and is used for receiving a first voltage signal and outputting a second voltage signal, wherein the voltage value of the second voltage signal is larger than or smaller than that of the first voltage signal; and

The inductance component is accommodated in the accommodating cavity and comprises an inductance main body and a first circuit board, the inductance main body is electrically connected to the power module and used for filtering the second voltage signal, the inductance main body is provided with an input end and an output end, and the first circuit board is arranged between the input end and the output end and shields and isolates the input end from the output end.

The inductance assembly further comprises a second circuit board, the second circuit board is connected to one side, adjacent to the output end, of the first circuit board in a bending mode, and the second circuit board at least partially covers the output end in the orthographic projection mode of the inductance main body.

The first circuit board is provided with a first insulating layer, a conducting layer and a second insulating layer which are sequentially stacked, the first insulating layer is arranged on one side, adjacent to the input end, of the first circuit board, the second insulating layer is arranged on one side, adjacent to the output end, of the first circuit board, and the conducting layer protrudes out of the second insulating layer along the direction perpendicular to the arrangement direction of the first insulating layer and the second insulating layer, and at least part of the conducting layer is abutted to the shell.

The second circuit board is provided with a conductive part, and the conductive part is electrically connected with the first circuit board.

The DC-DC assembly further comprises a cover plate and a conductive piece, the cover plate is abutted to the shell and is jointly enclosed with the shell to form the accommodating cavity, the conductive piece is arranged on one side, adjacent to the cover plate, of the second circuit board, and at least part of the conductive piece is abutted to the cover plate.

The DC-DC assembly further comprises a fastener, the second circuit board is provided with a first through hole, the shell is provided with a second through hole, and the fastener penetrates through the first through hole and the second through hole and is used for fixing the second circuit board to the shell.

The DC-DC assembly further comprises an output assembly and a first filter capacitor, wherein the output assembly is used for outputting the second voltage signal, the first filter capacitor is arranged on one side, adjacent to the output end, of the second circuit board, and the first filter capacitor is electrically connected to the second circuit board and is used for filtering alternating current signals in the second voltage signal.

The DC-DC assembly further comprises a third circuit board and a second filter capacitor, wherein the second filter capacitor is electrically connected to the third circuit board, is electrically connected to the output assembly and is used for filtering alternating current signals in the second voltage signals.

The DC-DC assembly further comprises a first conductive column and a second conductive column, one end of the first conductive column is electrically connected to the second circuit board, the other end of the first conductive column is electrically connected to the third circuit board, one end of the second conductive column is electrically connected to the third circuit board, and the other end of the second conductive column is connected to the output assembly.

In a second aspect, the present application also provides a fuel cell system including the DC-DC assembly. The DC-DC assembly includes a housing, a power module, and an inductance assembly. The inductance component comprises an inductance main body and a first circuit board, wherein the inductance main body is electrically connected with the power module and is used for filtering the second voltage signal, the inductance main body is provided with an input end and an output end, the first circuit board is arranged between the input end and the output end and shields and isolates the input end and the output end, so that electromagnetic interference between the input end and the output end of the inductance main body is eliminated, the filtering effect of the inductance main body is maximized, electromagnetic interference output by the DC-DC component is effectively reduced, harm to the power module inside the DC-DC component caused by the electromagnetic interference is avoided, safe working operation of the DC-DC component is guaranteed, and safety and reliability of the DC-DC component are improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a fuel cell system of an embodiment of the present application;

FIG. 2 is a schematic perspective exploded view of a DC-DC assembly according to an embodiment of the present application;

FIG. 3 is a schematic view showing a part of the structure of a DC-DC assembly according to a first embodiment of the present application;

FIG. 4 is an exploded perspective view of a portion of the DC-DC assembly provided in FIG. 3;

FIG. 5 is an exploded perspective view of a partially enlarged construction of the DC-DC assembly provided in FIG. 2;

FIG. 6 is a schematic view showing a part of the structure of a DC-DC assembly according to a second embodiment of the present application;

FIG. 7 is a schematic view showing a part of the structure of a DC-DC assembly according to a third embodiment of the present application;

FIG. 8 is a schematic cross-sectional view of the DC-DC assembly provided in FIG. 1 along line A-A;

Fig. 9 is a schematic view of a partial enlarged structure of the DC-DC assembly provided in fig. 8.

Reference numerals illustrate:

The fuel cell system comprises a 10-DC-DC component, a 11-shell, a 12-power module, a 13-inductance component, a 14-cover plate, a 15-conductive piece, a 16-fastener, a 17-output component, a 18-first filter capacitor, a 19-third circuit board, a 21-second filter capacitor, a 22-first conductive post, a 23-second conductive post, a 111-accommodating cavity, a 112-second through hole, a 131-inductance main body, a 132-first circuit board, a 133-second circuit board, a 1311-input end, a 1312-output end, a 1321-first insulating layer, a 1322-conductive layer, a 1323-second insulating layer, a 1331-conductive part and a 1332-first through hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" or "implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Referring to fig. 1, 2 and 3, fig. 1 is a schematic structural diagram of a fuel cell system according to an embodiment of the present application, fig. 2 is a schematic structural diagram of a DC-DC assembly according to an embodiment of the present application in a three-dimensional exploded manner, and fig. 3 is a schematic structural diagram of a part of a DC-DC assembly according to a first embodiment of the present application. The application provides a DC-DC assembly 10, wherein the DC-DC assembly 10 comprises a shell 11, a power module 12 and an inductance assembly 13. The housing 11 encloses a housing chamber 111. The power module 12 is accommodated in the accommodating cavity 111, and the power module 12 is configured to receive a first voltage signal and output a second voltage signal, where a voltage value of the second voltage signal is greater than or less than a voltage value of the first voltage signal. The inductance component 13 is accommodated in the accommodating cavity 111, the inductance component 13 includes an inductance main body 131 and a first circuit board 132, the inductance main body 131 is electrically connected to the power module 12 and is used for filtering the second voltage signal, the inductance main body 131 has an input end 1311 and an output end 1312, and the first circuit board 132 is disposed between the input end 1311 and the output end 1312 and shields the input end 1311 from the output end 1312.

The Direct Current-Direct Current (DC-DC) component may be applied to the fuel cell system 1 and boost or buck the first voltage signal output by the stack component in the fuel cell system 1, and it will be understood that the DC-DC component 10 may also be applied to an electronic device, and the application scenario of the DC-DC component 10 should not be limited to the DC-DC component 10 provided in this embodiment.

The material of the housing 11 may be, but is not limited to, metal, alloy, plastic, etc., which is not limited in the present application. The housing 11 (not shown) may define a housing cavity 111, and the housing cavity 111 may be used to house the power module 12 and the inductance assembly 13.

The power module 12 may include a boost module and a buck module, and the power module 12 may also include only a boost module or only a buck module, which is not limited by the present application.

The power module 12 may implement boosting or reducing the first voltage signal, specifically, when the DC-DC component 10 needs to boost the first voltage signal, the power module 12 receives the first voltage signal and outputs a second voltage signal, and a voltage value of the second voltage signal is greater than a voltage value of the first voltage signal. When the DC-DC assembly 10 needs to step down the first voltage signal, the power module 12 receives the first voltage signal and outputs a second voltage signal, and the voltage value of the second voltage signal is smaller than the voltage value of the first voltage signal.

Optionally, the inductor body 131 is a common mode inductor, and the common mode inductor may be electrically connected to the power module 12 of the DC-DC assembly 10 and filter the second voltage signal output by the DC-DC assembly 10, so as to reduce noise in the second voltage signal, reduce battery interference generated by the second voltage signal on the outside, and reduce electromagnetic interference from the outside received by the output assembly 17.

Further alternatively, the common mode inductance may be electrically connected to the power module 12 through the output component 17 of the DC-DC component 10, in other words, the common mode inductance may be electrically connected to the output component 17 of the DC-DC component 10, and the output component 17 may be electrically connected to the power module 12 and transmit the second voltage signal.

Optionally, the inductor body 131 has an input terminal 1311 and an output terminal 1312, the input terminal 1311 may be used for inputting the second voltage signal, and the output terminal 1312 may be used for outputting the filtered second voltage signal. Further alternatively, the inductor body 131 may further include a coil, a magnetic core, or other components, etc., and it should be understood that the other components of the inductor body 131 should not be limited to the inductor assembly 13 provided in this embodiment.

Alternatively, the first circuit board 132 may be a printed circuit board (Printed Circuit Board, PCB). Further alternatively, the first circuit board 132 may include a copper-clad layer. As can be appreciated, since the copper-clad layer is made of a conductive material, in this embodiment, the first circuit board 132 is disposed between the input end 1311 and the output end 1312 of the inductor main body 131, so that electromagnetic interference can be absorbed by using the conductive property of the first circuit board 132, thereby achieving the effect of electromagnetic shielding the input end 1311 and the output end 1312.

Alternatively, the number of the first circuit boards 132 may be, but is not limited to, one, two, three, or other numbers.

Alternatively, the first circuit board 132 may be rectangular, or approximately rectangular, or other irregular shape, etc. In a preferred embodiment of the present application, the shape of the first circuit board 132 may be matched according to the shape of the cross section of the inductor main body 131, so that a gap between the first circuit board 132 and the inductor main body 131 is less, and electromagnetic interference between the input end 1311 and the output end 1312 is effectively reduced.

In summary, the DC-DC assembly 10 provided in the present embodiment includes a housing 11, a power module 12, and an inductance assembly 13. The inductance component 13 includes an inductance main body 131 and a first circuit board 132, where the inductance main body 131 is electrically connected to the power module 12 and is used for filtering the second voltage signal, and the inductance main body 131 has an input end 1311 and an output end 1312, and the first circuit board 132 is disposed between the input end 1311 and the output end 1312 and shields and isolates the input end 1311 from the output end 1312, so as to eliminate electromagnetic interference between the input end 1311 and the output end 1312 of the inductance main body 131, maximize the filtering effect of the inductance main body 131, effectively reduce electromagnetic interference output by the DC-DC component 10, and avoid damage of the electromagnetic interference to the power module 12 inside the DC-DC component 10, thereby ensuring safe operation of the DC-DC component 10 and improving safety and reliability of the DC-DC component 10.

Referring to fig. 3 and 4, fig. 4 is an exploded perspective view of a part of the structure of the DC-DC assembly provided in fig. 3. The inductance assembly 13 further includes a second circuit board 133, the second circuit board 133 is bent and connected to a side of the first circuit board 132 adjacent to the output end 1312, and the orthographic projection of the second circuit board 133 on the inductance body 131 at least partially covers the output end 1312.

Alternatively, the second circuit board 133 may be a printed circuit board (Printed Circuit Board, PCB). Further alternatively, the second circuit board 133 may include a copper-clad layer.

Further alternatively, the second circuit board 133 may be provided with an insulating material at both sides of the copper-clad layer, so as to avoid a short circuit caused by contact of the second circuit board 133 with the inductor main body 131 or other components.

The second circuit board 133 may be, but is not limited to, connected to the first circuit board 132 by soldering, bonding, or fixing.

Alternatively, the bending angle between the second circuit board 133 and the first circuit board 132 may be 90 ° or approximately 90 °. And the second circuit board 133 is bent and connected to a side of the first circuit board 132 adjacent to the output end 1312 of the inductor main body 131.

Further alternatively, the second circuit board 133 may cover the output terminal 1312 in a front projection of the inductor main body 131.

In this embodiment, the second circuit board 133 may shield the output terminal 1312 of the inductor main body 131, thereby further reducing electromagnetic interference of the output terminal 1312 from the outside, and reducing electromagnetic interference of the output terminal 1312 to the outside, thereby more effectively reducing electromagnetic interference inside the DC-DC assembly 10, and effectively reducing electromagnetic interference of the DC-DC assembly 10 to the outside.

Please refer to fig. 2 and 3 again. The first circuit board 132 has a first insulating layer 1321, a conductive layer 1322, and a second insulating layer 1323 that are sequentially stacked, the first insulating layer 1321 is disposed on a side of the first circuit board 132 adjacent to the input end 1311, the second insulating layer 1323 is disposed on a side of the first circuit board 132 adjacent to the output end 1312, along a direction perpendicular to an arrangement direction of the first insulating layer 1321 and the second insulating layer 1323, the conductive layer 1322 is disposed on the second insulating layer 1323 in a protruding manner, and the conductive layer 1322 is at least partially abutted to the housing 11.

The material of the first insulating layer 1321 may be, but is not limited to, resin, fiberglass, plastic, insulating ink, or other materials.

The material of the conductive layer 1322 may be, but is not limited to, copper, aluminum, or other conductive materials, and in this embodiment, the conductive layer 1322 is exemplified as a copper-clad layer, so that the preparation of the first circuit board 132 is facilitated, and a good electromagnetic shielding effect is achieved.

The material of the second insulating layer 1323 may be, but is not limited to, resin, fiberglass, plastic, insulating ink, or other materials.

Optionally, the first insulating layer 1321 is disposed on a side of the first circuit board 132 adjacent to the input end 1311, and the second insulating layer 1323 is disposed on a side of the first circuit board 132 adjacent to the output end 1312, so as to avoid the situation that the conductive layer 1322 directly contacts the input end 1311 and the output end 1312 of the inductor main body 131 to cause the inductor main body 131 to be short-circuited and fail, thereby ensuring safe operation of the inductor main body 131 and the DC-DC assembly 10.

Alternatively, the conductive layer 1322 is disposed on the second insulating layer 1323 in a protruding manner along a direction perpendicular to the arrangement direction of the first insulating layer 1321 and the second insulating layer 1323, in other words, on both end sides of the first circuit board 132, the conductive layer 1322 is disposed on the second insulating layer 1323 in an exposed manner. In this embodiment, the portion of the conductive layer 1322 protruding from the second insulating layer 1323 may abut against the housing 11, so that the conductive layer 1322 of the first circuit board 132 may be grounded by contacting with the housing 11, so that the first circuit board 132 may more fully shield and isolate electromagnetic interference between the input end 1311 and the output end 1312.

Please refer to fig. 3 again. The second circuit board 133 has a conductive portion 1331, and the conductive portion 1331 is electrically connected to the first circuit board 132.

Optionally, in an embodiment of the present application, the first circuit board 132 has a copper-clad layer, and the second circuit board 133 also has a copper-clad layer.

Further alternatively, the copper-clad layer of the second circuit board 133 may be electrically connected to the copper-clad layer of the first circuit board 132. Specifically, during the soldering process of the first circuit board 132 and the second circuit board 133, the copper-clad layer of the second circuit board 133 may be connected to the copper-clad layer of the first circuit board 132, or the copper-clad layer of the second circuit board 133 and the copper-clad layer of the first circuit board 132 may be connected through the conductive portion 1331. In this embodiment, the copper-clad layer of the first circuit board 132 and the copper-clad layer of the second circuit board 133 are effectively electrically connected, so that the first circuit board 132 and the second circuit board 133 form a shielding and isolating layer with connectivity, thereby achieving a better electromagnetic shielding effect.

The material of the conductive portion 1331 may be, but is not limited to, solder, copper, or other materials with good conductive properties.

Referring to fig. 2, 3, 8 and 9, fig. 8 is a schematic cross-sectional structure of the DC-DC assembly provided in fig. 1 along A-A line, and fig. 9 is a schematic enlarged partial structure of the DC-DC assembly provided in fig. 8. The DC-DC assembly 10 further includes a cover plate 14 and a conductive member 15, the cover plate 14 is abutted to the housing 11, and forms the accommodating cavity 111 together with the housing 11, the conductive member 15 is disposed on one side of the second circuit board 133 adjacent to the cover plate 14, and the conductive member 15 is at least partially abutted to the cover plate 14.

Alternatively, the cover 14 may be made of metal, or alloy, or plastic, or other materials, etc., and it should be understood that the cover 14 should not be limited to the DC-DC assembly 10 according to the present embodiment.

Alternatively, the cover 14 is partially abutted against the housing 11, and forms the accommodating cavity 111 together with the housing 11. Further alternatively, the cover 14 is detachably connected to the housing 11.

Alternatively, the material of the conductive member 15 may be, but is not limited to, conductive cotton, metal, or other materials with good conductive properties.

Preferably, the conductive member 15 may be conductive cotton. Specifically, the conductive cotton is made of a polymer composite material, in this embodiment, the conductive cotton is disposed on one side of the second circuit board 133 adjacent to the cover plate 14, and one side of the conductive cotton contacts the copper-clad layer of the second circuit board 133, and the other side of the conductive cotton contacts and abuts against the cover plate 14, so that the second circuit board 133 is effectively in grounding contact with the cover plate 14 due to the good conductive performance of the conductive cotton, so that the second circuit board 133 has better electromagnetic interference shielding and isolating effects. Since the conductive cotton is elastic and has a damping effect, the unstable connection between the second circuit board 133 and the first circuit board 132 caused by the pressing of the cover 14 can be avoided, thereby further improving the reliability of the DC-DC assembly 10.

Referring to fig. 2 and 5, fig. 5 is an exploded perspective view of a partially enlarged structure of the DC-DC assembly provided in fig. 2. The DC-DC assembly 10 further includes a fastener 16, the second circuit board 133 has a first through hole 1332, the housing 11 has a second through hole 112, and the fastener 16 is disposed through the first through hole 1332 and the second through hole 112, and is used for fixing the second circuit board 133 to the housing 11.

Alternatively, the fastener 16 may be, but is not limited to, a screw, or a screw and nut, or solder, or adhesive, or other material, etc.

Alternatively, the number of fasteners 16 may be, but is not limited to being, one, or two, or three, or four, or other numbers, etc.

Alternatively, the first through holes 1332 penetrate through the second circuit board 133, and the number of the first through holes 1332 may be, but not limited to, one, two, three, four, or other numbers. Alternatively, the number of the first through holes 1332 may be equal to the number of the fasteners 16.

Alternatively, the shape of the first through hole 1332 may be, but not limited to, circular, square, oval, or other shapes.

Alternatively, the number of the second through holes 112 may be, but is not limited to, one, two, three, four, or other numbers. Alternatively, the number of the second through holes 112 may be equal to the number of the first through holes 1332.

Alternatively, the shape of the second through hole 112 may be, but not limited to, circular, square, oval, or other shapes.

In this embodiment, the fastener 16 is inserted through the first through hole 1332 and the second through hole 112, so that the second circuit board 133 is fixedly connected to the housing 11, and the fastener 16 may preferably be made of a conductive material, so that the fastener 16 may connect the second circuit board 133 to the housing 11 in a grounding manner, so that the second circuit board 133 may absorb electromagnetic interference more sufficiently, and further may have a better electromagnetic shielding effect on the output end 1312 of the inductor main body 131.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating a part of a DC-DC assembly according to a second embodiment of the application. The DC-DC assembly 10 further includes an output assembly 17 and a first filter capacitor 18, the output assembly 17 is configured to output the second voltage signal, the first filter capacitor 18 is disposed on a side of the second circuit board 133 adjacent to the output end 1312, and the first filter capacitor 18 is electrically connected to the second circuit board 133 and is configured to filter an ac signal in the second voltage signal.

Alternatively, the output assembly 17 may be, but is not limited to being, copper bars, or wire harnesses, or other conductive materials, etc. In the present embodiment, the output module 17 is illustrated by taking a copper bar as an example, so that the DC-DC module 10 can have high space utilization efficiency.

Alternatively, the output assembly 17 may be electrically connected to the power module 12 and used to transmit the second voltage signal to an output interface of the DC-DC assembly 10.

Optionally, the first filter capacitor 18 is disposed on a side of the second circuit board 133 adjacent to the output end 1312, and the first filter capacitor 18 is electrically connected to the second circuit board 133, and the second circuit board 133 may be electrically connected to the output component 17 through a conductive post. In this embodiment, the first filter capacitor 18 may not only be used to filter the ac signal in the second voltage signal, thereby reducing noise of the second voltage signal output by the DC-DC component 10, but also reduce interference signals in the second voltage signal, so as to effectively reduce electromagnetic interference output by the DC-DC component 10, and when the DC-DC component 10 is applied to the fuel cell system 1, electromagnetic interference of the fuel cell system 1 may be suppressed.

Please refer to fig. 6 again. The DC-DC assembly 10 further includes a third circuit board 19 and a second filter capacitor 21, where the second filter capacitor 21 is electrically connected to the third circuit board 19, and the second filter capacitor 21 is electrically connected to the output assembly 17 and is used for filtering ac signals in the second voltage signal.

Alternatively, the third circuit board 19 may be a printed circuit board (Printed Circuit Board, PCB). The third circuit board 19 may be used to carry the second filter capacitor 21.

Optionally, the second filter capacitor 21 is electrically connected to the third circuit board 19, and the second filter capacitor 21 is electrically connected to the output component 17, so as to further filter the ac signal in the second voltage signal, reduce the noise of the second voltage signal output by the DC-DC component 10, and further reduce the interference signal in the second voltage signal, thereby effectively reducing the electromagnetic interference output by the DC-DC component 10, and when the DC-DC component 10 is applied to the fuel cell system 1, the electromagnetic interference of the fuel cell system 1 can be further suppressed.

Referring to fig. 7, fig. 7 is a schematic view of a part of a DC-DC assembly according to a third embodiment of the present application. The DC-DC assembly 10 further comprises a first conductive post 22 and a second conductive post 23, wherein one end of the first conductive post 22 is electrically connected to the second circuit board 133, the other end of the first conductive post 22 is electrically connected to the third circuit board 19, one end of the second conductive post 23 is electrically connected to the third circuit board 19, and the other end of the second conductive post 23 is connected to the output assembly 17.

Alternatively, the first conductive post 22 may be a component having conductive properties, such as a screw. The second conductive post 23 may be a component having conductive properties, such as a screw.

Specifically, in the present embodiment, one end of the first conductive post 22 is electrically connected to the second circuit board 133, and the other end of the first conductive post 22 is electrically connected to the third circuit board 19, and is used for transmitting an electrical signal between the second circuit board 133 and the third circuit board 19. One end of the second conductive post 23 is electrically connected to the third circuit board 19, and the other end of the second conductive post 23 is connected to the output component 17. By the arrangement of the first conductive posts 22 and the second conductive posts 23, the first filter capacitor 18 disposed on the second circuit board 133 can achieve better filtering effect by grounding.

Please refer to fig. 1 and 2 again. A fuel cell system 1, said fuel cell system 1 comprising said DC-DC assembly 10.

Alternatively, the fuel cell system 1 may include the DC-DC assembly 10, and the fuel cell system 1 may further include a stack assembly, a power cell, and the like, and it should be understood that other components of the fuel cell system 1 should not be limited to the fuel cell system 1 provided in this embodiment.

In this embodiment, the DC-DC assembly 10 provided in this embodiment includes a housing 11, a power module 12, and an inductance assembly 13. The inductance component 13 includes an inductance main body 131 and a first circuit board 132, where the inductance main body 131 is electrically connected to the power module 12 and is used for filtering the second voltage signal, and the inductance main body 131 has an input end 1311 and an output end 1312, and the first circuit board 132 is disposed between the input end 1311 and the output end 1312 and shields and isolates the input end 1311 from the output end 1312, so as to eliminate electromagnetic interference between the input end 1311 and the output end 1312 of the inductance main body 131, maximize the filtering effect of the inductance main body 131, effectively reduce the electromagnetic interference output by the DC-DC component 10, and avoid the harm of the electromagnetic interference to the power module 12 inside the DC-DC component 10, so as to ensure safe operation of the DC-DC component 10, and further inhibit the electromagnetic interference of the fuel cell system 1, and further suppress the electromagnetic interference of the fuel cell system 1 when the fuel cell system 1 outputs a large current, and improve the safety and reliability of the DC-DC component 10 and the fuel cell system 1.

Reference in the specification to "an embodiment," "implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the application may be combined with other embodiments. Furthermore, it should be understood that the features, structures or characteristics described in the embodiments of the present application may be combined arbitrarily without any conflict with each other, to form yet another embodiment without departing from the spirit and scope of the present application.

Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above-mentioned preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present application without departing from the spirit and scope of the technical solution of the present application.

Claims (10)

1. A DC-DC assembly, the DC-DC assembly comprising:

the shell is surrounded to form a containing cavity;

The power module is accommodated in the accommodating cavity, and is used for receiving a first voltage signal and outputting a second voltage signal, wherein the voltage value of the second voltage signal is larger than or smaller than that of the first voltage signal; and

The inductance component is accommodated in the accommodating cavity and comprises an inductance main body and a first circuit board, the inductance main body is electrically connected to the power module and used for filtering the second voltage signal, the inductance main body is provided with an input end and an output end, and the first circuit board is arranged between the input end and the output end and shields and isolates the input end from the output end.

2. The DC-DC assembly of claim 1 wherein the inductor assembly further comprises a second circuit board, the second circuit board is bent and connected to a side of the first circuit board adjacent to the output terminal, and the second circuit board at least partially covers the output terminal in a front projection of the inductor body.

3. The DC-DC assembly of claim 1 wherein the first circuit board has a first insulating layer, a conductive layer, and a second insulating layer stacked in order, the first insulating layer is disposed on a side of the first circuit board adjacent to the input end, the second insulating layer is disposed on a side of the first circuit board adjacent to the output end, the conductive layer is disposed on the second insulating layer in a protruding manner along a direction perpendicular to an arrangement direction of the first insulating layer and the second insulating layer, and the conductive layer is at least partially abutted to the housing.

4. The DC-DC assembly of claim 2, wherein the second circuit board has a conductive portion and the conductive portion is electrically connected to the first circuit board.

5. The DC-DC assembly of claim 2 further comprising a cover plate and a conductive member, wherein the cover plate abuts against the housing and encloses the housing together to form the accommodating cavity, the conductive member is disposed on a side of the second circuit board adjacent to the cover plate, and the conductive member at least partially abuts against the cover plate.

6. The DC-DC assembly of claim 2, wherein the DC-DC assembly further comprises a fastener, the second circuit board has a first through hole, the housing has a second through hole, the fastener is disposed through the first through hole and the second through hole, and is used to fix the second circuit board to the housing.

7. The DC-DC assembly of claim 2 further comprising an output assembly and a first filter capacitor, the output assembly configured to output the second voltage signal, the first filter capacitor disposed on a side of the second circuit board adjacent to the output terminal, the first filter capacitor electrically connected to the second circuit board and configured to filter an ac signal in the second voltage signal.

8. The DC-DC assembly of claim 7 further comprising a third circuit board and a second filter capacitor electrically connected to the third circuit board and electrically connected to the output assembly and configured to filter ac signals from the second voltage signal.

9. The DC-DC assembly of claim 8 further comprising a first conductive post and a second conductive post, one end of the first conductive post being electrically connected to a second circuit board, the other end of the first conductive post being electrically connected to the third circuit board, one end of the second conductive post being electrically connected to the third circuit board, and the other end of the second conductive post being connected to the output assembly.

10. A fuel cell system comprising a DC-DC assembly according to any one of claims 1 to 9.