DC-DC converter and vehicle

Abstract

The utility model discloses a DC-DC converter and a vehicle. The DC-DC converter includes a housing and a control unit. The shell is provided with a containing cavity. The control unit is arranged in the containing cavity and comprises a circuit board, a power module and a functional circuit set, the power module and the functional circuit set are arranged on the circuit board, the circuit board is connected to the shell, and the functional circuit set comprises at least one of a filter circuit, a communication circuit and an auxiliary power circuit. The DC-DC converter is simple in structure and small in occupied space.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of converters, and particularly relates to a DC-DC converter and a vehicle. BACKGROUND

[0002] A DC-DC converter is an electric energy conversion circuit or electromechanical device that can convert a direct-current power supply into a direct-current power supply of different voltage. The DC-DC converter is divided into three types: a step-up DC-DC converter, a step-down DC-DC converter, and a step-up and step-down DC-DC converter.

[0003] In the related art, the DC-DC converter includes function circuits that are not reasonably arranged, so that the DC-DC converter itself has the disadvantages of complex structure and large space occupation. CONTENT OF THE UTILITY MODEL

[0004] The application provides a DC-DC converter and a vehicle, and the DC-DC converter has a simple structure and small space occupation.

[0005] The application provides a DC-DC converter, which includes a shell and a control unit. The shell is provided with an accommodation cavity. The control unit is arranged in the accommodation cavity, and the control unit includes a circuit board and a power module and a function circuit group arranged on the circuit board. The circuit board is connected to the shell, and the function circuit group includes at least one of a filter circuit, a communication circuit, and an auxiliary power supply circuit.

[0006] In some embodiments, the function circuit group includes the filter circuit, the communication circuit, and the auxiliary power supply circuit, the circuit board includes adjacent first and second regions along a first direction, the filter circuit, the communication circuit, and the auxiliary power supply circuit are arranged in the first region, and the power module is arranged in the second region.

[0007] In some embodiments, the filter circuit, the communication circuit, and the auxiliary power supply circuit are arranged on a peripheral side of the circuit board.

[0008] In some embodiments, a first shielding plate is further included, the first shielding plate is arranged in the accommodation cavity, and the first shielding plate is connected to the shell. The first shielding plate covers at least part of the function circuit group.

[0009] In some embodiments, an interface assembly is further included, the interface assembly is connected with a pin, the pin is welded to the circuit board, and the pin is electrically connected to the function circuit group.

[0010] In some embodiments, the interface assembly includes a DC-DC interface and a high-voltage current input interface.

[0011] In some embodiments, the shell includes a plurality of side walls, and the DC-DC interface and the high-voltage current input interface are arranged on the same side wall.

[0012] In some embodiments, a flow channel, an inlet and an outlet are further included, the flow channel is arranged in the accommodating cavity, the flow channel is communicated with the inlet and the outlet, and the control unit is in heat-conducting contact with the flow channel.

[0013] In some embodiments, the shell comprises a shell body and a cover plate, the shell body is provided with an opening, the opening is communicated with the accommodating cavity, and the cover plate covers the opening and is detachably connected with the shell body.

[0014] The application also provides a vehicle comprising the DC-DC converter of any one of the above.

[0015] The application has at least the following beneficial effects:

[0016] The DC-DC converter provided by the application comprises a shell and a control unit. The shell is provided with an accommodating cavity, and the control unit is arranged in the accommodating cavity. The control unit comprises a circuit board and a power module and a functional circuit group arranged on the circuit board. The circuit board is connected to the shell, and the functional circuit group comprises at least one of a filter circuit, a communication circuit and an auxiliary power supply circuit. The functional circuit group is directly arranged on the circuit board with the power module, without the need to separately manufacture a separate circuit board and connect it to the circuit board with the power module through a wire harness or a copper bar. The wire harness, the copper bar and other circuit boards are saved, so that the DC-DC converter not only has a simple structure, a low cost and a small occupied space. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed to be used in the embodiments of the application will be briefly introduced. Those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0018] Fig. 1 A structural schematic diagram of the DC-DC converter provided by one embodiment of the application;

[0019] Fig. 2 A partial structural schematic diagram of the DC-DC converter provided by one embodiment of the application;

[0020] Fig. 3 A structural schematic diagram of the control unit provided by one embodiment of the application.

[0021] The following is an explanation of the reference signs:

[0022] 1, shell; 11, shell body; 12, cover plate;

[0023] 2, control unit; 21, power module; 22, functional circuit group; 221, auxiliary power supply circuit; 222, filter circuit; 223, communication circuit;

[0024] 3, interface assembly; 31, DC-DC interface; 32, low-voltage communication interface; 33, high-voltage current input interface;

[0025] 4, first shielding plate;

[0026] 5, second shielding plate;

[0027] 6, inlet;

[0028] 7, outlet;

[0029] 8, first region;

[0030] 9, second region. DETAILED DESCRIPTION

[0031] The features and exemplary embodiments of the various aspects of the present application will be described in detail below with reference to the drawings. The following detailed description is merely intended to explain the present application, and is not intended to limit the present application. The present application can be implemented without some of the specific details, which are well known to those skilled in the art. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.

[0032] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... " does not, without more limitations, preclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0033] A DC-DC converter is an electrical energy conversion circuit or electromechanical device that can convert a direct current power supply into a direct current power supply of different voltage. DC-DC converters are divided into three categories: step-up DC-DC converters, step-down DC-DC converters, and step-up / down DC-DC converters.

[0034] In the related art, the included function circuit of the DC-DC converter is not reasonably arranged, for example, the communication circuit, the auxiliary power supply circuit and other function circuits thereof are respectively made into separate circuit boards, and then are connected to the main circuit through a wire harness or a copper bar. Such a scheme is not only complex in structure, high in cost and large in space occupied.

[0035] To solve the above problems, the present application provides a DC-DC converter and a vehicle which are simple in structure, low in cost and small in space occupied. In order to better understand the present application, the following will be combined with Figs. 1-3 The DC-DC converter and the vehicle according to the embodiments of the present application are described in detail.

[0036] Please refer to Figs. 1-3 The present application provides a DC-DC converter, comprising a shell 1 and a control unit 2, the shell 1 is provided with a receiving cavity. The control unit 2 is arranged in the receiving cavity, the control unit 2 comprises a circuit board and a power module 21 and a function circuit group 22 arranged on the circuit board, the circuit board is connected to the shell 1, and the function circuit group 22 comprises at least one of a filter circuit 222, a communication circuit 223 and an auxiliary power supply circuit 221.

[0037] The shell 1 can include a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film, etc.

[0038] The shell 1 can be a cubic structure or a cylindrical structure. Alternatively, the shell 1 is a cubic structure.

[0039] The receiving cavity can be a cubic structure or a cylindrical structure. Alternatively, the receiving cavity is a cubic structure.

[0040] The power module 21 is also called a main circuit, which is the main part of the DC-DC converter, and is mainly responsible for converting the input DC voltage into the required DC voltage of the output, which is completed by the opening and closing of the power switch tube.

[0041] The function circuit group 22 comprises at least one of the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221. It can be understood that the function circuit group 22 comprises one of the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221, or it can be understood that the function circuit group 22 comprises two of the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221, or it can be understood that the function circuit group 22 comprises all of the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221.

[0042] The filter circuit 222 can be used to reduce the AC component in the pulsating DC voltage, retain the DC component, reduce the output voltage ripple coefficient and make the waveform smoother.

[0043] The communication circuit 223 can be used to ensure efficient and reliable transmission of information in a communication system.

[0044] The auxiliary power supply circuit 221 can be another core circuit outside the main power circuit, which can be used to provide stable and reliable power supply for the power-consuming devices in the main power circuit, such as the controller, the driver, the operational amplifier, the logic gate circuit, etc., to ensure the reliable operation of the main power circuit and the continuous power supply for the load device.

[0045] According to an embodiment of the present application, a DC-DC converter includes a housing 1 and a control unit 2. The housing 1 is provided with a receiving cavity, and the control unit 2 is arranged in the receiving cavity. The control unit 2 includes a circuit board and a power module 21 and a functional circuit group 22 arranged on the circuit board. The circuit board is connected to the housing 1, and the functional circuit group 22 includes at least one of a filter circuit 222, a communication circuit 223, and an auxiliary power supply circuit 221. The functional circuit group 22 is directly arranged on the circuit board with the power module 21, instead of being separately manufactured into a separate circuit board and then connected to the circuit board with the power module 21 through a wire harness or a copper bar, thereby saving the wire harness, the copper bar, and other circuit boards. Therefore, the DC-DC converter not only has a simple structure and low cost, but also occupies a small space.

[0046] Please refer to Fig. 3 In some embodiments, the functional circuit group 22 includes the filter circuit 222, the communication circuit 223, and the auxiliary power supply circuit 221. The circuit board includes adjacent first and second regions 8 and 9 along a first direction. The filter circuit 222, the communication circuit 223, and the auxiliary power supply circuit 221 are arranged in the first region 8, and the power module 21 is arranged in the second region 9.

[0047] The area of the first region 8 can be greater than the area of the second region 9. Of course, the area of the first region 8 can also be less than or equal to the area of the second region 9, which is not limited in the present application.

[0048] The shape of the first region 8 can be rectangular, circular, or triangular. The shape of the second region 9 can be rectangular, circular, or triangular.

[0049] The shape of the first region 8 can be the same as or different from the shape of the second region 9.

[0050] The DC-DC converter provided by one embodiment of the present application divides the circuit board into the adjacent first area 8 and the second area 9, and arranges the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221 in the first area 8 and the power module 21 in the second area 9, so that the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221 are more reasonably distributed, and the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221 are more conveniently electrically connected with the power module 21 and the external device.

[0051] In some embodiments, the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221 are arranged on the peripheral side of the circuit board.

[0052] The peripheral side of the circuit board can be understood as the edge of the circuit board and the range of one third of the overall area of the circuit board.

[0053] The DC-DC converter provided by one embodiment of the present application arranges the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221 on the peripheral side of the circuit board, so that the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221 are more reasonably distributed, and the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221 are more conveniently electrically connected with the external device.

[0054] Please refer to Fig. 2 and Fig. 3 In some embodiments, the DC-DC converter further comprises a first shielding plate 4, the first shielding plate 4 is arranged in the accommodating cavity, and the first shielding plate 4 is connected to the shell 1, and the first shielding plate 4 covers at least part of the functional circuit group 22.

[0055] The first shielding plate 4 covers at least part of the functional circuit group 22, which can be understood as that the first shielding plate 4 covers all of the functional circuit group 22, or can be understood as that the first shielding plate 4 covers part of the functional circuit group 22.

[0056] The first shielding plate 4 is connected to the shell 1, and the connection can be one of fixed connection or detachable connection, and the fixed connection can be fixed by welding or bonding. The detachable connection can be detachable by fastening with fasteners such as bolts, or can be detachable by clamping and matching with part of one extending into the other.

[0057] The DC-DC converter provided by one embodiment of the present application can protect the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221 by setting the first shielding plate 4 and covering at least part of the functional circuit group 22 with the first shielding plate 4, thereby avoiding electromagnetic interference on the filter circuit 222, the communication circuit 223 and the auxiliary power supply circuit 221.

[0058] In some embodiments, the DC-DC converter further comprises a second shielding plate 5, the second shielding plate 5 is arranged in the accommodating cavity, and the second shielding plate 5 is connected to the shell 1, and the second shielding plate 5 covers at least part of the power module 21.

[0059] The second shielding plate 5 covers at least part of the power module 21, which can be understood as that the second shielding plate 5 covers all of the power module 21, or can be understood as that the second shielding plate 5 covers part of the power module 21.

[0060] The DC-DC converter provided by one embodiment of the present application can protect the power module 21 by setting the second shielding plate 5 and covering at least part of the power module 21 with the second shielding plate 5, thereby avoiding electromagnetic interference on the power module 21.

[0061] In some embodiments, the DC-DC converter further comprises an interface assembly 3, the interface assembly 3 is connected with a pin, the pin is welded with the circuit board, and is electrically connected with the functional circuit group 22.

[0062] The DC-DC converter provided by one embodiment of the present application can make the structure of the DC-DC converter as a whole more simple, higher in integration and lower in cost by welding the pin connected with the interface assembly 3 with the circuit board.

[0063] In some embodiments, the interface assembly 3 comprises a DC-DC interface 31 and a high-voltage current input interface 33. The DC-DC converter provided by one embodiment of the present application can realize input of high-voltage direct current from the high-voltage current input interface 33, passing through the power module 21 and the functional circuit group 22, and finally output of low-voltage direct current from the DC-DC interface 31 by setting the DC-DC interface 31 and the high-voltage current input interface 33.

[0064] In some embodiments, the interface assembly 3 further comprises a low-voltage communication interface 32.

[0065] The DC-DC converter provided by one embodiment of the present application can realize communication between the DC-DC converter and external equipment by setting the low-voltage communication interface 32.

[0066] In some embodiments, the shell 1 comprises a plurality of side walls, the interface assembly 3 comprises a DC-DC interface 31, a low-voltage communication interface 32 and a high-voltage current input interface 33, and the DC-DC interface 31 and the high-voltage current input interface 33 are arranged on the same side wall.

[0067] The DC-DC converter provided by one embodiment of the present application has a simpler structure and a higher integration by arranging the DC-DC interface 31 and the high-voltage current input interface 33 on the same side wall.

[0068] In some embodiments, the low-voltage communication interface 32 is arranged on the same side wall as the DC-DC interface 31 and the high-voltage current input interface 33.

[0069] The DC-DC converter provided by one embodiment of the present application has a simpler structure and a higher integration by arranging the low-voltage communication interface 32 on the same side wall as the DC-DC interface 31 and the high-voltage current input interface 33.

[0070] In some embodiments, the DC-DC converter further comprises a flow channel, an inlet 6 and an outlet 7, the flow channel is arranged in the accommodating cavity, the flow channel is in communication with the inlet 6 and the outlet 7, and the control unit 2 is in heat-conducting contact with the flow channel.

[0071] Optionally, the control unit 2 is located on the path of the flow channel.

[0072] The heat-conducting contact can be direct heat-conducting contact between the control unit 2 and the flow channel, or indirect heat-conducting contact between the control unit 2 and the flow channel through a heat-conducting pad or the like. The heat-conducting contact can be understood as heat exchange between the control unit 2 and the flow channel.

[0073] The DC-DC converter provided by one embodiment of the present application has a simpler structure and a higher integration by arranging the low-voltage communication interface 32 on the same side wall as the DC-DC interface 31 and the high-voltage current input interface 33.

[0074] Please refer to Fig. 1 In some embodiments, the shell 1 comprises a shell body 11 and a cover plate 12, the shell body 11 is provided with an opening, the opening is in communication with the accommodating cavity, and the cover plate 12 covers the opening and is detachably connected with the shell body 11.

[0075] The shell body 11 can be provided with one or more openings. The cover plate 12 can also be provided with one or more openings.

[0076] The DC-DC converter provided by the embodiment of the application is characterized in that the shell is provided as two parts of a shell body 11 and a cover plate 12, and the cover plate 12 and the shell body 11 are provided as detachable connection, so that the control unit 2 is convenient for detection and maintenance.

[0077] In some embodiments, the shell body 11 is provided with a first connecting hole, the cover plate 12 is provided with a second connecting hole, and the fastener is arranged through the first connecting hole and the second connecting hole to connect the cover plate 12 to the shell body 11.

[0078] Optionally, the fastener comprises a bolt and a nut.

[0079] The DC-DC converter provided by the embodiment of the application is characterized in that the shell body 11 is provided with a first connecting hole, the cover plate 12 is provided with a second connecting hole, and the fastener is arranged through the first connecting hole and the second connecting hole to connect the cover plate 12 to the shell body 11.

[0080] In some embodiments, a sealing ring is arranged between the shell body 11 and the cover plate 12.

[0081] Optionally, the sealing ring comprises a rubber ring.

[0082] The DC-DC converter provided by the embodiment of the application is characterized in that the shell body 11 is provided with a first connecting hole, the cover plate 12 is provided with a second connecting hole, and the fastener is arranged through the first connecting hole and the second connecting hole to connect the cover plate 12 to the shell body 11.

[0083] The embodiment of the application provides a vehicle comprising the DC-DC converter.

[0084] The vehicle provided by the embodiment of the application has the advantages of simple structure, low cost and small space occupation due to comprising the DC-DC converter.

[0085] The above is only a specific implementation of the application, and those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, module and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be described here. It should be understood that the protection scope of the application is not limited to this, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed in the application, and these modifications or replacements should be covered in the protection scope of the application.

Claims

1. A DC-DC converter, characterized in that, include: The housing has a receiving cavity; A control unit is disposed in the receiving cavity. The control unit includes a circuit board and a power module and a functional circuit group disposed on the circuit board. The circuit board is connected to the housing. The functional circuit group includes at least one of a filter circuit, a communication circuit, and an auxiliary power supply circuit.

2. The DC-DC converter according to claim 1, characterized in that, The functional circuit group includes a filter circuit, a communication circuit, and an auxiliary power supply circuit. The circuit board includes an adjacent first area and a second area along a first direction. The filter circuit, the communication circuit, and the auxiliary power supply circuit are all located in the first area, and the power module is located in the second area.

3. The DC-DC converter according to claim 1, characterized in that, The filtering circuit, communication circuit, and auxiliary power supply circuit are all located on the periphery of the circuit board.

4. The DC-DC converter according to any one of claims 1-3, characterized in that, It also includes a first shielding plate, which is placed inside the receiving cavity and connected to the housing, and covers at least a portion of the functional circuit group.

5. The DC-DC converter according to claim 1, characterized in that, It also includes an interface component, which is connected to pins that are soldered to the circuit board and electrically connected to the functional circuit group.

6. The DC-DC converter according to claim 5, characterized in that, The interface components include a DC-DC interface and a high-voltage current input interface.

7. The DC-DC converter according to claim 6, characterized in that, The housing includes multiple sidewalls, and the DC-DC interface and the high-voltage current input interface are both located on the same sidewall.

8. The DC-DC converter according to claim 1, characterized in that, It also includes a flow channel, an inlet, and an outlet. The flow channel is disposed in the receiving cavity and connects the inlet and the outlet. The control unit is in thermal contact with the flow channel.

9. The DC-DC converter according to claim 1, characterized in that, The housing includes a housing body and a cover plate. The housing body has an opening that communicates with the receiving cavity. The cover plate covers the opening and is detachably connected to the housing body.

10. A vehicle, characterized in that, Includes the DC-DC converter as described in any one of claims 1-9.

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