CN216162606U

CN216162606U - Power converter

Info

Publication number: CN216162606U
Application number: CN202122292511.3U
Authority: CN
Inventors: 不公告发明人
Original assignee: Inovices Technologies Ltd
Current assignee: Inovices Technologies Ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-04-01
Anticipated expiration: 2031-09-22

Abstract

The embodiment of the utility model discloses a power converter. The power converter includes: a printed wiring board and a housing; the printed circuit board is an aluminum substrate, a converter circuit is arranged on the printed circuit board and comprises a voltage conversion control chip and a peripheral circuit connected with the voltage conversion control chip; the peripheral circuit comprises a first filtering module, a voltage reduction conversion module, a first switch unit and a second filtering module; the voltage reduction conversion module comprises a second switch unit, an inductor and a first capacitor; the shell is a semi-surrounding structure and is arranged on one side of the printed circuit board. This scheme helps promoting power converter's radiating effect, prolongs power converter's life to, this scheme still has simple structure, the lower advantage of the installation degree of difficulty.

Description

Power converter

Technical Field

The embodiment of the utility model relates to the technical field of power supplies, in particular to a power supply converter.

Background

The power converter is a device capable of converting voltage, and the power converter can be widely applied to various fields, for example, when the power converter is applied to an electric vehicle, the power converter can convert the voltage of a storage battery of the electric vehicle into the working voltage of an electric device on the electric vehicle, so that electric appliances such as a horn, an instrument and a lamp on the electric vehicle can normally work by supplying power through the storage battery.

In the working process of the power converter, the internal electronic components can generate a large amount of heat, so that the internal components can be damaged, even the service life of the internal components is influenced, and the quality and the service life of the power converter are influenced. The conventional power converter generally improves the heat dissipation effect by increasing the shell of the power converter or additionally increasing a heat dissipation device and the like, so that the manufacturing cost is increased, the whole occupied space of the power converter is enlarged, and the installation is not facilitated.

SUMMERY OF THE UTILITY MODEL

Embodiments of the present invention provide a power converter to improve a heat dissipation effect of the power converter and reduce cost.

An embodiment of the present invention provides a power converter, including: a printed wiring board and a housing;

the printed circuit board is an aluminum substrate, a converter circuit is arranged on the printed circuit board and comprises a power input end, a power output end, a voltage conversion control chip and a peripheral circuit connected with the voltage conversion control chip;

the voltage conversion control chip comprises an input signal end, a first control driving end, a second control driving end, a switch function end and a voltage feedback end; the peripheral circuit comprises a first filtering module, a voltage reduction conversion module, a first switch unit and a second filtering module; the input signal end is connected with the power input end, and the first filtering module is connected between the power input end and the ground; the control end of the first switch unit is connected with the first control driving end, the first end of the first switch unit is connected with the switch function end, and the second end of the first switch unit is grounded; the voltage reduction conversion module comprises a second switch unit, an inductor and a first capacitor; the control end of the second switch unit is connected with the second control drive end, the first end of the second switch unit is connected with the input signal end, and the second end of the second switch unit is connected with the switch function end; the inductor is connected between the switch function end and a first pole of the first capacitor, the first pole of the first capacitor is connected with the power output end, and a second pole of the first capacitor is connected with the voltage feedback end; the second filtering module is connected between the power supply output end and the ground;

the casing is half enclosed construction, the casing is installed one side of printed wiring board.

Optionally, the printed circuit board further comprises a metal plate, the printed circuit board is fixed on one side surface of the metal plate, and a heat dissipation structure is engraved on the other side surface of the metal plate;

the shell is arranged on one side of the metal plate for fixing the printed circuit board, so that the shell and the metal plate surround the printed circuit board.

Optionally, the metal plate is an aluminum plate, and the heat dissipation structure includes a plurality of strip grooves parallel to each other;

the thickness from the bottom of the strip-shaped groove to the surface of one side of the metal plate for fixing the printed circuit board is greater than or equal to 1 mm and less than or equal to 10 mm.

Optionally, the housing is a rectangular parallelepiped housing, the housing is provided with an opening, and the shape of the opening is matched with the shape of the metal plate;

at least one side edge of the metal plate is provided with a fixing piece, and a fixing groove is dug in the fixing piece.

Optionally, the power converter further comprises a connection terminal, a first power line, a second power line and a ground line;

the first power line is connected between the wiring terminal and the power input end, the second power line is connected between the wiring terminal and the power output end, and the grounding line is connected between the wiring terminal and the converter circuit;

the shell is provided with a through hole, and the first power line, the second power line and the grounding wire are all led out of the shell through the through hole so as to be connected with the wiring terminal.

Optionally, the housing is a rectangular housing, the housing is provided with an opening, the shape of the opening is matched with the shape of the printed circuit board, the housing is directly mounted on the printed circuit board, and the edge of the opening is connected with the edge of the printed circuit board;

at least one side edge of the printed circuit board is provided with a fixing piece, and a fixing groove is dug in the fixing piece.

Optionally, the first switch unit includes a first transistor, a gate of the first transistor is connected to the first control driving end, a first pole of the first transistor is connected to the switch function end, and a second pole of the first transistor is grounded;

the second switch unit comprises a second transistor, the grid electrode of the second transistor is connected with the second control driving end, the first pole of the second transistor is connected with the input signal end, and the second pole of the second transistor is connected with the switch function end.

Optionally, the buck conversion module further includes a first resistor and a second resistor;

a first end of the first resistor is connected between the inductor and a first pole of the first capacitor, and a second end of the first resistor is connected with a second pole of the first capacitor;

the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is grounded.

Optionally, the first filtering module includes a second capacitor and a third capacitor, first poles of the second capacitor and the third capacitor are both connected to the power input terminal, and second poles of the second capacitor and the third capacitor are both grounded;

the second filtering module comprises a fourth capacitor, a first pole of the fourth capacitor is connected with the power output end, and a second pole of the fourth capacitor is grounded;

the voltage conversion control chip also comprises an enabling end, a frequency control end, a continuous current control end and a grounding end; the peripheral circuit further comprises a third resistor, a fourth resistor and a fifth resistor; the third resistor is connected between the power supply input end and the enabling end, the fourth resistor is connected between the frequency control end and the ground, and the fifth resistor is connected between the continuous current control end and the ground.

Optionally, at least part of the transistors, at least part of the resistors and at least part of the capacitor patches in the converter circuit are arranged on the aluminum substrate.

According to the technical scheme, the aluminum substrate is selected as the printed circuit board of the power converter, so that on one hand, the heat conduction coefficient of the aluminum substrate material is higher, the heat dissipation efficiency of the power converter during working is favorably improved, and on the other hand, the electronic components can be arranged on the aluminum substrate in a surface-mounted mode, and the heat dissipation effect is favorably further improved. In the power converter after the equipment, printed circuit board can also dispel the heat through the mode of contact with the casing for this scheme can promote power converter's radiating effect through multiple mode, helps prolonging power converter's life. Moreover, the structure of the scheme is simple, the installation difficulty is low, other heat dissipation structures do not need to be additionally arranged in the power converter, the cost of the power converter is reduced, the occupied space of the power converter is reduced, and the power converter is installed.

Drawings

Fig. 1 is a schematic structural diagram of a printed wiring board according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a housing according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a power converter according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a converter circuit according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a side surface of a metal plate according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of another side surface of a metal plate according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another converter circuit according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

As mentioned in the background, there is a need for heat dissipation in power converters. However, the conventional scheme for improving the heat dissipation performance of the power converter not only increases the manufacturing cost of the power converter, but also increases the overall occupied space of the power converter, which is not favorable for installation.

In view of the above problems, embodiments of the present invention provide a power converter. Fig. 1 is a schematic structural diagram of a printed wiring board according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a housing according to an embodiment of the present invention; fig. 3 is a schematic structural diagram of a power converter according to an embodiment of the present invention; fig. 4 is a schematic structural diagram of a converter circuit according to an embodiment of the present invention. With reference to fig. 1 to 4, a power converter provided in an embodiment of the present invention includes: a printed wiring board 10 and a housing 30.

The printed circuit board 10 is an aluminum substrate, the printed circuit board 10 is provided with a converter circuit 100, and the converter circuit 100 includes a power input terminal IN, a power output terminal OUT, a voltage conversion control chip U1 and a peripheral circuit connected to the voltage conversion control chip U1.

The voltage conversion control chip U1 includes an input signal terminal VIN, a first control driving terminal NDRI, a second control driving terminal PDRI, a switch function terminal SW and a voltage feedback terminal FB; the peripheral circuit includes a first filtering module 110, a buck conversion module 120, a first switching unit 130, and a second filtering module 140; the input signal end VIN is connected to the power input end IN, and the first filtering module 110 is connected between the power input end IN and the ground; the control end of the first switch unit 130 is connected to the first control driving end NDRI, the first end of the first switch unit 130 is connected to the switch function end SW, and the second end of the first switch unit 130 is grounded; the buck conversion module 120 includes a second switching unit 150, an inductor L, and a first capacitor C1; the control end of the second switch unit 150 is connected to the second control drive end PDRI, the first end of the second switch unit 150 is connected to the input signal end VIN, and the second end of the second switch unit 150 is connected to the switch function end SW; the inductor L is connected between the switch function terminal SW and the first pole of the first capacitor C1, the first pole of the first capacitor C1 is connected with the power output terminal OUT, and the second pole is connected with the voltage feedback terminal FB; the second filtering module 140 is connected between the power output terminal OUT and ground.

The housing 30 is a half-enclosed structure, and the housing 30 is mounted on one side of the printed wiring board 10.

The power converter provided by the embodiment of the utility model can be widely applied to various occasions needing to convert power, and the embodiment of the utility model and the following embodiments take the example that the power converter is applied to an electric vehicle and converts the voltage of a battery of the electric vehicle into the working voltage of an electric device on the electric vehicle as an example. In practical applications, the application of the power converter may be set according to requirements, and the embodiment of the present invention is not limited thereto.

Specifically, the aluminum substrate is a metal-based copper-clad plate with a good heat dissipation function, and a single-sided board generally comprises a three-layer structure, namely a circuit layer (copper foil), an insulating layer and a metal base layer. In the power converter in the prior art, a cellulose-based composite material is generally used as the printed circuit board, in this embodiment, the printed circuit board 10 is an aluminum substrate, and since the thermal conductivity of the aluminum substrate is higher, the heat dissipation efficiency of the printed circuit board 10 is improved when the power converter works, so that the heat dissipation effect of the power converter is improved. Moreover, the electronic components on the printed circuit board 10 can be mounted on the aluminum substrate, so that the heat dissipation effect of the printed circuit board 10 can be further improved, the service life of the electronic components can be prolonged, and the working efficiency of the power converter can be improved.

The converter circuit 100 is configured to convert an input voltage at the power input terminal IN into an output voltage, and output the output voltage through the power output terminal OUT. The converter circuit 100 can implement a step-down function of converting dc to dc, where the input voltage is a battery voltage of the electric vehicle, for example, the input voltage may be a dc voltage of 24V to 95V, the output voltage may be used to supply power to a power device on the electric vehicle, for example, the output voltage may be a dc voltage of 12V, and the maximum output current of the converter circuit 100 may be 10A.

The voltage conversion control chip U1 may be a synchronous DC-DC conversion control chip. The first filtering module 110 is used for filtering an input signal at the power input terminal IN. The voltage conversion control chip U1 may provide a control signal to the control terminal of the first switch unit 130 through the first control driving terminal NDRI, so that the first switch unit 130 is turned on or off in response to a signal of the control terminal thereof, and provide a control signal to the control terminal of the second switch unit 150 through the second control driving terminal PDRI, so that the second switch unit 150 is turned on or off in response to a signal of the control terminal thereof. Alternatively, the first switching unit 130 may function as a synchronous rectification switch to function as a power switch, and the second switching unit 150 may function as a main switch to function as a power switch. The second switch unit 150, the inductor L and the first capacitor C1 in the Buck converter module 120 may form a Buck converter structure to implement a dc-to-dc Buck function. The second filtering module 140 is configured to filter an output signal of the power output terminal OUT.

The housing 30 is a semi-enclosed structure and forms an integrated housing to simplify the assembly process of the power converter, and the specific material of the housing 30 can be aluminum or plastic according to the heat dissipation and cost requirements. Alternatively, the housing 30 is a rectangular parallelepiped housing, and the housing 30 is provided with an opening. For example, the housing 30 is a rectangular parallelepiped housing having a five-sided structure, the housing 30 includes an upper surface, a front surface, a rear surface, a left surface, and a right surface, and the opening of the housing 30 is located below the housing 30.

Alternatively, in one embodiment, the housing 30 may be mounted directly to one side of the printed wiring board 10. Illustratively, the housing 30 may be directly mounted on the side of the printed wiring board 10 where the converter circuit 100 is disposed, such that the housing 30 surrounds the side of the printed wiring board 10 where the converter circuit 100 is disposed, and the opening edge of the housing 30 meets the edge of the printed wiring board 10. This has the advantage that not only the installation of the power converter can be simplified to save cost, but also the printed circuit board 10 can be contacted with the housing 30 to dissipate heat, thereby improving the heat dissipation effect of the power converter.

Alternatively, in another embodiment, the housing 30 may be mounted indirectly to one side of the printed wiring board 10. For example, the power converter further includes a metal plate, and fig. 5 is a schematic structural diagram of a side surface of the metal plate according to an embodiment of the present invention, and specifically may be a schematic structural diagram of an upper surface of the metal plate. Referring to fig. 1 to 5, the printed wiring board 10 may be fixed to one side surface of the metal plate 20, and the case 30 is mounted on the side of the metal plate 20 where the printed wiring board 10 is fixed, so that the case 30 and the metal plate 20 are disposed to surround the printed wiring board 10. When the case 30 is a rectangular parallelepiped case and the case 30 is provided with an opening, the shape of the opening may be adapted to the shape of the metal plate 20. This arrangement is advantageous in that the voltage conversion control chip U1 and the peripheral circuits in the printed wiring board 10 can be dissipated through the metal plate 20, and the printed wiring board 10 can also be dissipated in contact with the housing 30, thereby improving the heat dissipation effect of the power converter.

In summary, according to the technical scheme of this embodiment, by selecting the aluminum substrate as the printed circuit board of the power converter, on one hand, because the heat conductivity coefficient of the aluminum substrate material is higher, the heat dissipation efficiency of the power converter during operation is facilitated to be improved, and on the other hand, the electronic component can be arranged on the aluminum substrate in a surface-mounted manner, which is helpful to further improve the heat dissipation effect. In the power converter after the equipment, printed circuit board can also dispel the heat through the mode of contact with the casing for this scheme can promote power converter's radiating effect through multiple mode, helps prolonging power converter's life. Moreover, the structure of the scheme is simple, the installation difficulty is low, other heat dissipation structures do not need to be additionally arranged in the power converter, the cost of the power converter is reduced, the occupied space of the power converter is reduced, and the power converter is installed.

Fig. 6 is a schematic structural diagram of another side surface of a metal plate according to an embodiment of the present invention. Referring to fig. 1 to 6, the power converter may further include a metal plate, the printed circuit board 10 is fixed to one side surface of the metal plate 20, and a heat dissipation structure is engraved on the other side surface of the metal plate 20. The case 30 is mounted on the side of the metal plate 20 where the printed wiring board 10 is fixed, so that the case 30 and the metal plate 20 are disposed to surround the printed wiring board 10. Exemplarily, the printed circuit board 10 is fixed on the upper surface of the metal plate 20, the heat dissipation structure is located on the lower surface of the metal plate 20, fig. 5 is a schematic structural diagram of the upper surface of the metal plate 20, and fig. 6 is a schematic structural diagram of the lower surface of the metal plate 20, where fig. 6 only shows the heat dissipation structure located on the lower surface of the metal plate 20, and does not specifically show other structures of the metal plate 20.

For example, referring to fig. 1 to 6, when assembling the power converter, the printed circuit board 10 may be fixed on the upper surface of the metal plate 20, and then the side of the housing 30 having the opening is mounted on the edge of the upper surface of the metal plate 20, so that the edge of the opening of the housing 30 is connected to the edge of the upper surface of the metal plate 20, and the printed circuit board 10 is surrounded. The heat dissipation structure is located on the lower surface of the metal plate 20, when the power converter works, the voltage conversion control chip U1 and the peripheral circuit in the printed circuit board 10 can not only dissipate heat through the metal plate 20 and the heat dissipation structure thereof, but also the printed circuit board 10 can dissipate heat through the contact with the casing 30, thereby improving the heat dissipation effect.

On the basis of the above embodiment, with reference to fig. 5 and 6, optionally, the metal plate 20 is an aluminum plate, the heat dissipation structure includes a plurality of strip-shaped grooves parallel to each other, each groove includes a side wall perpendicular to the metal plate 20, and two adjacent grooves share one side wall. When the power converter works, the printed circuit board can not only be in contact with the metal plate 20 for heat dissipation, but also be in heat dissipation through a heat dissipation structure formed by the groove and the side wall, so that the heat dissipation effect is further improved.

Alternatively, the thickness D1 from the bottom of the bar-shaped groove to the surface of the metal plate 20 on the side where the printed wiring board 10 is fixed is greater than or equal to 1 mm and less than or equal to 10 mm. The metal plate 20 is thin, which helps to reduce the space occupied by the power converter.

Alternatively, referring to fig. 5, the metal plate 20 is provided at least at one side edge thereof with a fixing member 210, and the fixing member 210 is dug with a fixing groove 220. Illustratively, the power converter is fixed to the electric vehicle, for example, in a card slot of the electric vehicle, by the fixing slot 220. This has the advantage of facilitating the installation of the power converter. Fig. 5 schematically shows a case where the fixing members 210 are disposed on both opposite edges of the metal plate 20, and in practical applications, the fixing members 210 may be disposed on only one side edge of the metal plate 20 to save an installation space, or the fixing members 210 may be disposed on both opposite edges of the metal plate 20 to ensure stability of installation.

Alternatively, in the scheme that the housing 30 is directly mounted on the printed circuit board 10, the fixing member 210 may be disposed on at least one side edge of the printed circuit board 10, and the fixing groove 220 is dug on the fixing member 210. When the housing 30 is directly mounted to the printed circuit board 10, the power converter can be fixed to the electric vehicle through the fixing groove 220 of the printed circuit board 10, so as to facilitate the mounting of the power converter. In practical applications, the fixing member 210 may be disposed on only one side edge of the printed circuit board 10 to save the installation space, or the fixing members 210 may be disposed on both opposite edges of the printed circuit board 10 to ensure the stability of installation. When the housing 30 is directly mounted on the printed wiring board 10, the fixing member 210 shown in fig. 3 may be the fixing member 210 provided on the printed wiring board 10, and when the printed wiring board 10 is mounted on the housing 30 via the metal plate 20, the fixing member 210 shown in fig. 3 may also be the fixing member 210 provided on the metal plate 20, and the specific mounting manner of the housing 30 and the printed wiring board 10 is not limited in this embodiment.

With reference to fig. 1, 3 and 4, optionally, the power converter further includes a connection terminal 40, a first power line L1, a second power line L2 and a ground line L3; the first power supply line L1 is connected between the connection terminal 40 and the power supply input terminal IN, the second power supply line L2 is connected between the connection terminal 40 and the power supply output terminal OUT, and the ground line L3 is connected between the connection terminal 40 and the converter circuit 100; a through hole is provided on the housing 30, and the first power supply line L1, the second power supply line L2 and the ground line L3 all exit the housing 30 through the through hole to connect the connection terminal 40.

Specifically, the first power line L1 receives the power signal through the connection terminal 40, the second power line L2 outputs the power signal through the connection terminal 40, and each ground terminal in the converter circuit 100 is grounded through the ground line L3 and the connection terminal 40. Referring to fig. 1 to 4, when assembling the power converter, the printed circuit board 10 may be fixed to the upper surface of the metal plate 20, the first power line L1, the second power line L2, and the ground line L3 connected to the connection terminal 40 may be introduced through the through hole of the case 30 and soldered to the printed circuit board 10, and finally the side of the case 30 having the opening may be mounted on the edge of the upper surface of the metal plate 20, so that the edge of the opening of the case 30 may be connected to the edge of the upper surface of the metal plate 20, and the printed circuit board 10 may be surrounded. The technical scheme of the embodiment is beneficial to simplifying the assembling steps of the power converter.

Fig. 7 is a schematic structural diagram of another converter circuit according to an embodiment of the present invention. On the basis of the foregoing embodiments, with reference to fig. 4 and fig. 7, optionally, the first switching unit 130 includes a first transistor Q1, a gate of the first transistor Q1 is connected to the first control driving terminal NDRI, a first pole of the first transistor Q1 is connected to the switch function terminal SW, and a second pole of the first transistor Q1 is grounded; the second switching unit 150 includes a second transistor Q2, a gate of the second transistor Q2 is connected to the second control driving terminal PDRI, a first pole of the second transistor Q2 is connected to the input signal terminal VIN, and a second pole of the second transistor Q2 is connected to the switching function terminal SW. The first transistor Q1 is a synchronous rectification switching tube, and functions as a power switch. The second transistor Q2 is a main switching transistor and functions as a power switch. The first transistor Q1 may be an NMOS and the second transistor Q2 may be a PMOS.

Based on the above embodiments, with reference to fig. 4 and fig. 7, optionally, the buck conversion module 120 further includes a first resistor R1 and a second resistor R2; a first end of the first resistor R1 is connected between the inductor L and the first pole of the first capacitor C1, and a second end of the first resistor R1 is connected to the second pole of the first capacitor C1; the first end of the second resistor R2 is connected to the second end of the first resistor R1, and the second end of the second resistor R2 is grounded. The first resistor R1, the second resistor R2, and the first capacitor C1 may form an RC absorption network.

On the basis of the foregoing embodiment, with reference to fig. 4 and fig. 7, optionally, the first filtering module 110 includes a second capacitor C2 and a third capacitor C3, first poles of the second capacitor C2 and the third capacitor C3 are both connected to the power input terminal IN, and second poles of the second capacitor C2 and the third capacitor C3 are both grounded; the second filtering module 140 includes a fourth capacitor C4, a first pole of the fourth capacitor C4 is connected to the power output terminal OUT, and a second pole of the fourth capacitor C4 is grounded. The second capacitor C2 and the third capacitor C3 are used for filtering the input signal at the power input IN.

Optionally, the voltage conversion control chip U1 further includes an enable terminal EN, a frequency control terminal RT, a persistent current control terminal ILIM, and a ground terminal GND; the peripheral circuit further comprises a third resistor R3, a fourth resistor R4 and a fifth resistor R5; the third resistor R3 is connected between the power input terminal IN and the enable terminal EN, the fourth resistor R4 is connected between the frequency control terminal RT and ground, and the fifth resistor R5 is connected between the persistent current control terminal ILIM and ground. Specifically, the enable terminal EN is used to input an enable signal, the frequency control terminal RT is used to input a frequency control signal, the persistent current control terminal ILIM is used to adjust the current limit threshold, and the ground terminal GND is used to ground.

On the basis of the above embodiment, optionally, at least part of the transistors, at least part of the resistors and at least part of the capacitor patches in the converter circuit 100 are disposed on the aluminum substrate. Fig. 1 schematically illustrates a case where a transistor Q and a capacitor C patch are provided on the printed wiring board 10, and in conjunction with fig. 1 and 7, the two transistors Q in fig. 1 may be a first transistor Q1 and a second transistor Q2, and the two capacitors C may be any two capacitors in the converter circuit 100. For example, in other embodiments of the present invention, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 may be all electrolytic capacitors, the first capacitor C1 is a patch capacitor, the first resistor R1 to the fifth resistor R5 are all patch resistors, and the first transistor Q1 and the second transistor Q2 are all patch resistors disposed on the printed circuit board 10. In the prior art, components such as transistors are generally fixed on the side face of a shell of the power converter, the transistors are directly cooled through the shell, and at least part of electronic component patches in the converter circuit 100 can be arranged on an aluminum substrate according to the scheme, so that the cooling effect of the electronic components is improved, the service life of the electronic components is prolonged, and the working efficiency of the power converter is improved.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A power converter, comprising: a printed wiring board and a housing;

2. The power converter according to claim 1, further comprising a metal plate, wherein the printed circuit board is fixed on one side surface of the metal plate, and a heat dissipation structure is engraved on the other side surface of the metal plate;

3. The power converter according to claim 2, wherein the metal plate is an aluminum plate, and the heat dissipation structure comprises a plurality of strip-shaped grooves parallel to each other;

4. The power converter according to claim 3, wherein the housing is a rectangular parallelepiped housing, the housing is provided with an opening, and the shape of the opening is adapted to the shape of the metal plate;

5. The power converter of claim 1, further comprising a connection terminal, a first power line, a second power line, and a ground line;

6. The power converter according to claim 1, wherein the casing is a rectangular parallelepiped casing, the casing is provided with an opening, the shape of the opening is matched with the shape of the printed circuit board, the casing is directly mounted on the printed circuit board, and the edge of the opening is connected with the edge of the printed circuit board;

7. The power converter according to any one of claims 1-6, wherein the first switching unit comprises a first transistor, a gate of the first transistor is connected to the first control driving terminal, a first pole of the first transistor is connected to the switch function terminal, and a second pole of the first transistor is grounded;

8. The power converter of claim 7, wherein the buck converter module further comprises a first resistor and a second resistor;

9. The power converter according to claim 8, wherein the first filtering module comprises a second capacitor and a third capacitor, first poles of the second capacitor and the third capacitor are both connected to the power input terminal, and second poles of the second capacitor and the third capacitor are both grounded;

10. The power converter according to claim 9, wherein at least part of the transistors, at least part of the resistors and at least part of the capacitor patches in the converter circuit are disposed on the aluminum substrate.