Power module support, power module and manufacturing method thereof

Abstract

The embodiment of the invention provides a power module support, a power module and a manufacturing method thereof, the power module support comprises an upper support and a lower support, the upper support is provided with a first electric connection part, the lower support is provided with a second electric connection part and a third electric connection part, and the upper surface of the lower support is used for installing a power circuit. The power circuit at least comprises a power electronic unit and is provided with a current input end, a current output end and a control end; the upper end of the second electric connection part is electrically connected with the current input end of the power circuit on the upper surface of the lower bracket, and the lower end is electrically connected with an external current input circuit; the upper end of the third electric connection part is electrically connected with the current output end of the power circuit, and the lower end is electrically connected with an external current output circuit; the lower end of the first electric connection part is electrically connected with the control end of the power circuit, and the upper end is electrically connected with an external driving circuit. The embodiment of the invention can solve the technical problem that the existing power module is not perfect enough.

Description

Technical Field

[0001] The present invention relates to the field of electronics, and in particular to a power module bracket, a power module and a manufacturing method thereof. Background Art

[0002] In an existing power module, a power circuit is usually arranged on a circuit board, and the circuit board and the power circuit are potted together into a module. The power circuit is generally used to control and convert electrical energy.

[0003] In existing power modules, the current input terminal, current output terminal and control terminal of the power circuit are usually arranged on a single side of the circuit board. The power module is powered on one side, which leads to crowded circuit wiring, complex lines, extremely high production line costs, and complex manufacturing processes. In addition, a sufficiently large circuit board is usually required for production, resulting in a larger power module size. Summary of the invention

[0004] A power module bracket, a power module and a manufacturing method thereof provided by the embodiments of the present invention solve the technical problem that the existing power modules are not perfect.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a power module bracket, comprising an upper bracket and a lower bracket for upper and lower assembly, wherein:

[0006] The upper bracket is provided with a first electrical connection portion;

[0007] The lower bracket is provided with a second electrical connection portion and a third electrical connection portion, and the second electrical connection portion and the third electrical connection portion are provided separately;

[0008] The upper surface of the lower bracket is used to install a power circuit, the power circuit includes at least one power electronic unit, and the power circuit has a current input terminal, a current output terminal and a control terminal;

[0009] The upper end of the second electrical connection portion is used to be electrically connected to the current input end on the upper surface of the lower bracket, and the lower end is used to be electrically connected to an external current input circuit;

[0010] The upper end of the third electrical connection portion is used to be electrically connected to the current output end on the upper surface of the lower bracket, and the lower end is used to be electrically connected to an external current output circuit;

[0011] The lower end of the first electrical connection portion is used to be electrically connected to the control end on the upper surface of the lower bracket, and the upper end is used to be electrically connected to an external driving circuit.

[0012] In order to solve the above technical problems, an embodiment of the present invention further provides a power module, comprising any of the above power module brackets, and also comprising a power circuit, wherein:

[0013] The power circuit is mounted on the upper surface of the lower bracket of the power module bracket, the power circuit includes at least one power electronic unit, and the power circuit has a current input terminal, a current output terminal and a control terminal;

[0014] The upper end of the second electrical connection portion of the power module bracket is electrically connected to the current input end of the power circuit, and the lower end is used to be electrically connected to an external current input circuit;

[0015] The upper end of the third electrical connection portion of the power module bracket is electrically connected to the current output end of the power circuit, and the lower end is used to be electrically connected to an external current output circuit;

[0016] The lower end of the first electrical connection portion of the power module bracket is electrically connected to the control end of the power circuit, and the upper end is used to be electrically connected to an external driving circuit.

[0017] In order to solve the above technical problems, an embodiment of the present invention further provides a method for manufacturing a power module, which is used to manufacture the above power module. The method for manufacturing the power module includes:

[0018] S101, manufacturing an upper bracket and a lower bracket, wherein the upper bracket is provided with a first electrical connection portion, and the lower bracket is provided with a second electrical connection portion and a third electrical connection portion, and the second electrical connection portion and the third electrical connection portion are provided separately;

[0019] S102, installing a power circuit on the upper surface of the lower bracket, wherein the power circuit includes at least one power electronic unit, and the power circuit has a current input terminal, a current output terminal, and a control terminal;

[0020] S103, assemble the upper bracket and the lower bracket up and down, and electrically connect the upper end of the second electrical connection part to the current input end on the upper surface of the lower bracket, electrically connect the upper end of the third electrical connection part to the current output end on the upper surface of the lower bracket, and electrically connect the lower end of the first electrical connection part to the control end on the upper surface of the lower bracket.

[0021] Beneficial Effects

[0022] The power module bracket, power module and manufacturing method thereof provided by the embodiment of the present invention, the power module bracket includes an upper bracket and a lower bracket for upper and lower assembly, the control end of the power circuit installed in the lower bracket can be electrically connected to the external drive circuit through the first electrical connection part of the upper bracket, and the current input end and the current output end can be electrically connected to the external current input circuit and the external current output circuit through the second electrical connection part and the third electrical connection part of the lower bracket respectively. It can be seen that the control end of the power circuit installed in the power module bracket is connected to the external circuit through the upper bracket, and the current input end and the current output end are connected to the external circuit through the lower bracket respectively, so as to realize the circuit layering of the power module, and the power module is powered on both sides for external connection; and the control end of the power circuit often flows through a small current, and the current input end and the current output end often flow through a large current, and the small current is powered from the top of the power module, and the large current is powered from the bottom of the power module, so as to realize the layered arrangement of the small current and the large current, and such a power module is installed as an integral device, such as being installed on an external circuit board, and the lower end of the second electrical connection part and the lower end of the third electrical connection part of the lower surface of the lower bracket can be close to the external circuit board, which is conducive to the heat dissipation of the large current. In addition, the overall circuit layout is more orderly, and the size of the power module is reduced. The power circuit is encapsulated into a double-layer power module. As an independent electronic device, the power module is easy to install and replace, and the manufacturing method is simpler. It can be implemented by general engineering personnel without the need for professional personnel to manufacture and install.

[0023] Other features and corresponding beneficial effects of the present invention are described in the latter part of the specification, and it should be understood that at least part of the beneficial effects become obvious from the description in the specification of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a power module provided in Embodiment 1 of the present invention;

[0025] Figure 2 A circuit diagram provided for Embodiment 1 of the present invention;

[0026] Figure 3 This is a flow chart of a method for manufacturing a power module provided in the second embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the following is a further detailed description of the embodiments of the present invention through specific implementation methods combined with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] Embodiment 1:

[0029] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples. Figure 1 The power module includes a power module bracket and a power circuit, wherein the structure of the power module bracket is as follows:

[0030] The power module bracket includes an upper bracket 11 and a lower bracket 12 for upper and lower assembly, wherein the upper bracket 11 is provided with a first electrical connection portion 111; the lower bracket 12 is provided with a second electrical connection portion 121 and a third electrical connection portion 122, and the second electrical connection portion 121 and the third electrical connection portion 122 are provided separately;

[0031] The upper surface of the lower bracket 12 is used to install a power circuit, which includes at least one power electronic unit 21. The power circuit has a current input terminal, a current output terminal and a control terminal.

[0032] The upper end of the second electrical connection portion 121 is used to be electrically connected to the current input end of the upper surface of the lower bracket 12, and the lower end is used to be electrically connected to the external current input circuit;

[0033] The upper end of the third electrical connection portion 122 is used to be electrically connected to the current output end of the upper surface of the lower bracket 12, and the lower end is used to be electrically connected to the external current output circuit;

[0034] The lower end of the first electrical connection portion 111 is used to be electrically connected to the control end of the upper surface of the lower bracket 12 , and the upper end is used to be electrically connected to an external driving circuit.

[0035] In some embodiments, the upper bracket 11 may also be provided with a fourth electrical connection portion 112, and the fourth electrical connection portion 112 and the first electrical connection portion 111 are provided separately; the lower end of the fourth electrical connection portion 112 is used to be electrically connected to the upper end of the second electrical connection portion 121 or the current input end of the power circuit, and the upper end is used to be electrically connected to an external circuit. The external circuit connected to the upper end of the fourth electrical connection portion 112 includes but is not limited to a detection circuit. The manner in which the fourth electrical connection portion 112 and the first electrical connection portion 111 are provided separately includes but is not limited to providing an insulating portion between the fourth electrical connection portion 112 and the first electrical connection portion 111.

[0036] In some embodiments, the upper bracket 11 may further be separately provided with at least one fifth electrical connection portion 113, and the upper end of the fifth electrical connection portion 113 is used to be electrically connected to an external circuit, the first electrical connection portion 111 and / or the fourth electrical connection portion 112. Each fifth electrical connection portion 113, the fifth electrical connection portion 113 and the fourth electrical connection portion 112, and the fifth electrical connection portion 113 and the first electrical connection portion 111 are separately provided. The manner of separate provision includes but is not limited to providing an insulating portion between any two electrical connection portions.

[0037] In some embodiments, the upper end of the first electrical connection part 111, the upper end of the fourth electrical connection part 112, and / or the upper end of the fifth electrical connection part 113 are exposed on the upper surface of the upper bracket 11; the lower end of the second electrical connection part 121 and / or the lower end of the third electrical connection part 122 are exposed on the lower surface of the lower bracket 12. The exposed design is convenient for connection with an external circuit and also convenient for heat dissipation. In particular, the second electrical connection part 121 and the third electrical connection part 122 are often used for passing large currents, and the heat dissipation is faster when exposed on the lower surface of the lower bracket 12.

[0038] In some embodiments, the lower end of the first electrical connection portion 111, the lower end of the fourth electrical connection portion 112, and / or the lower end of the fifth electrical connection portion 113 are exposed on the lower surface of the upper bracket 11; the upper end of the second electrical connection portion 121 and / or the upper end of the third electrical connection portion 122 are exposed on the upper surface of the lower bracket 12. These exposed designs facilitate electrical connection with the power circuit installed on the upper surface of the lower bracket.

[0039] In some embodiments, the lower end of the second electrical connection portion 121 is exposed on the lower surface of the lower bracket 12, and the lower end of the second electrical connection portion 121 is a plane. Optionally, the lower end plane of the second electrical connection portion 121 is 8-10 mm long and 2-4 mm wide, for example, 8 mm long and 2 mm wide, or 10 mm long and 4 mm wide. In some embodiments, the lower end of the third electrical connection portion 122 is exposed on the lower surface of the lower bracket 12, and the lower end of the third electrical connection portion 122 is a plane. Optionally, the lower end plane of the third electrical connection portion 122 is 8-12 mm long and 4-6 mm wide, for example, 10 mm long and 5 mm wide. Since the second electrical connection portion 121 and the third electrical connection portion 122 are often used to pass large currents, the lower ends are exposed on the lower surface of the lower bracket 12, and the lower ends are a plane with a slightly larger area, which is conducive to connection with an external circuit and heat dissipation. The lower end of the second electrical connection portion 121 and the lower end of the third electrical connection portion 122 can be mounted on the external circuit board in a manner of being in close contact with the external circuit board, which also makes it easier to dissipate heat.

[0040] In some embodiments, the upper end of the second electrical connection portion 121 is exposed on the upper surface of the lower bracket 12, and the upper end of the second electrical connection portion 121 is a plane. In some embodiments, the upper end of the third electrical connection portion 122 is exposed on the upper surface of the lower bracket 12, and the upper end of the third electrical connection portion 122 is a plane. The plane design is convenient for connection with the current input terminal and the current output terminal of the power circuit. In some embodiments, the power circuit or the power electronic unit 21 in the power circuit is installed at the upper end of the third electrical connection portion 122, and is in close contact with the upper end of the third electrical connection portion 122 to facilitate heat dissipation.

[0041] In some embodiments, at least one of the first electrical connection part 111, the second electrical connection part 121, the third electrical connection part 122, the fourth electrical connection part 112, and the fifth electrical connection part 113 is an integrated molded structure, such as a metal column, a metal block, etc. The integrated molding method can simplify the structure and facilitate circuit connections on the upper and lower surfaces of the upper bracket 11 and the upper and lower surfaces of the lower bracket 12.

[0042] In some embodiments, since the fifth electrical connection portion 113 is only used to make circuit connections on the upper surface of the upper bracket 11 and does not need to extend into the interior or lower surface of the upper bracket 11, the fifth electrical connection portion 113 can also be only arranged on the upper surface of the upper bracket 11, such as a copper layer plated on the upper surface of the upper bracket 11 made of insulating material.

[0043] In some embodiments, the first electrical connection part 111 and the fourth electrical connection part 112 can also be arranged only on the upper surface or the lower surface of the upper bracket 11, and a through hole (or groove) can be set at the corresponding position of the upper bracket 11, and a metal wire or metal part can be set in the through hole (or groove) to connect to the other side of the upper bracket 11; the structure of the second electrical connection part 121 and the third electrical connection part 122 can also refer to this design.

[0044] In this embodiment, taking the first electrical connection part 111 as an example, the first electrical connection part 111 includes an upper end and a lower end, and a middle end connected therebetween; the upper end is exposed on the upper surface of the upper bracket 11, and the lower end is exposed on the lower surface of the upper bracket 11; the first electrical connection part 111 is an integrally formed structure, the first electrical connection part 111 passes through the upper surface and the lower surface of the upper bracket 11, and the first electrical connection part 111 can be a metal column, a metal block, etc. that passes through the upper and lower surfaces of the upper bracket 11. The structures of the second electrical connection part 121, the third electrical connection part 122, the fourth electrical connection part 112, and the fifth electrical connection part 113 refer to the structure of the first electrical connection part 111.

[0045] The upper bracket 11 and the lower bracket 12 are used for upper and lower assembly, and the shapes of the upper bracket 11 and the lower bracket 12 are not limited. A through hole (or groove) can be set on the insulating substrate, and at least one of the first electrical connection part 111, the second electrical connection part 121, the third electrical connection part 122, the fourth electrical connection part 112, and the fifth electrical connection part 113 can be set in the through hole (or groove). The upper bracket 11 can also be made by filling the gap between the first electrical connection part 111, the fourth electrical connection part 112, and the fifth electrical connection part 113 with an insulating part, and the lower bracket 12 can be made by filling the gap between the second electrical connection part 121 and the third electrical connection part 122 with an insulating part.

[0046] The power circuit is used to realize the preset function, and the power circuit includes at least one power electronic unit, and may also include other auxiliary electronic devices and auxiliary circuits, such as resistors, control circuits, etc. The power electronic unit 21 includes but is not limited to power electronic devices and power chips. The power electronic devices include but are not limited to power semiconductor devices, such as MOS tubes, thyristor transistors, insulated gate bipolar transistors (IGBT), etc. MOS tubes include but are not limited to silicon carbide MOS tubes.

[0047] The power module includes the above-mentioned power module bracket and also includes a power circuit, which is installed on the upper surface of the lower bracket 12. The upper end of the second electrical connection part 121 of the power module bracket is electrically connected to the current input end of the power circuit, and the lower end is used to be electrically connected to the external current input circuit; the upper end of the third electrical connection part 122 of the power module bracket is electrically connected to the current output end of the power circuit, and the lower end is used to be electrically connected to the external current output circuit; the lower end of the first electrical connection part 111 of the power module bracket is electrically connected to the control end of the power circuit, and the upper end is used to be electrically connected to the external drive circuit.

[0048] In some embodiments, the power module also includes a first electrical connector 31, a second electrical connector 32 and / or a third connector 33, the upper end of the first electrical connector 31 is electrically connected to the lower end of the first electrical connection part 111, and the lower end of the first electrical connector 31 is electrically connected to the control end of the power circuit; the upper end of the second electrical connector 32 is electrically connected to the lower end of the fourth electrical connection part 112, and the lower end of the second electrical connector 32 is electrically connected to the upper end of the second electrical connection part 121 or the current input end; one end of the third connector 33 is electrically connected to the current input end, and the other end is electrically connected to the upper end of the second electrical connection part 32. In some embodiments, the first electrical connector 31 and the second electrical connector 32 may be copper sheets or copper columns. The first electrical connector 31 may be disposed on the lower surface of the upper bracket 11, with the upper end fixedly connected to the lower end of the first electrical connection portion 111, and the lower end extending downward to above the control end of the power circuit; the second electrical connector 32 may be disposed on the lower surface of the lower bracket 12, with the lower end fixedly connected to the upper end of the second electrical connection portion 121, and the upper end extending upward to the lower end of the fourth electrical connection portion 112, or the third connector 33 may also be disposed on the lower surface of the upper bracket 11, with the upper end fixedly connected to the lower end of the fourth electrical connection portion 112, and the lower end extending downward to the upper end of the second electrical connection portion 121; the third connector 33 may be a metal wire.

[0049] In the present embodiment, the power circuit includes a power chip, which is a MOS tube chip, and integrates a MOS tube. The source S of the MOS tube is the current input end of the power circuit, the drain D of the MOS tube (not shown in the figure) is the current output end of the power circuit, and the gate G of the MOS tube is the control end of the power circuit. The drain D of the MOS tube is arranged on the lower surface of the MOS tube, and the source S and the gate G of the MOS tube are arranged on the upper surface of the MOS tube. The MOS tube is installed at the upper end of the third electrical connection part 122, and the drain D of the MOS tube is closely connected to the upper end of the third electrical connection part 122. The gate G of the MOS tube is electrically connected to the lower end of the first electrical connection part 111 through the first electrical connection member 31, and the source S of the MOS tube is electrically connected to the upper end of the second electrical connection part 121 through the third electrical connection member 33. The source S of the MOS tube is also electrically connected to the lower end of the fourth electrical connection part 112 through the second electrical connection member 32.

[0050] In this embodiment, the upper bracket 11 is separately provided with three fifth electrical connection parts 113, wherein the upper ends of the two fifth electrical connection parts 113 located in the middle area of ​​the upper bracket 11 can be used to connect the thermistor NTC and the protection circuit; the upper end of another fifth electrical connection part 13 can be used to connect between the external drive circuit and one end of the gate resistor R, and the other end of the gate resistor R is electrically connected to the upper end of the first electrical connection part 111. That is to say, in the power module bracket and power module provided in this embodiment, the external drive circuit can be directly electrically connected to the upper end of the first electrical connection part 111; or the gate resistor R is connected between the upper end of a fifth electrical connection part 13 and the upper end of the first electrical connection part 111, the external drive circuit is electrically connected to the upper end of the fifth electrical connection part 13, and the upper end of the fifth electrical connection part 13 is electrically connected to the upper end of the first electrical connection part 111 through the gate resistor R. The equivalent circuit after the thermistor NTC and the gate resistor R are provided can be referred to. Figure 2 .

[0051] In some embodiments, electronic components such as resistors may be connected between the fourth electrical connection portion 112 and the first electrical connection portion 111 .

[0052] The power module bracket and power module provided by the embodiment of the present invention, the control end of the power circuit installed in the power module bracket is connected to the external circuit through the upper bracket, and the current input end and the current output end are respectively connected to the external circuit through the lower bracket, so as to realize the circuit layering of the power module, and the power module is powered on both sides for external connection; and the control end of the power circuit often flows through a small current, and the current input end and the current output end often flow through a large current, the small current is powered from the top of the power module, and the large current is powered from the bottom of the power module, so as to realize the layered arrangement of small current and large current, and such a power module is installed as a whole, such as being installed on an external circuit board, and the lower end of the second electrical connection part and the lower end of the third electrical connection part on the lower surface of the lower bracket can be close to the external circuit board, which is conducive to the heat dissipation of the large current. In addition, the overall circuit layout is more orderly, and the volume of the power module is reduced at the same time, and the power circuit is encapsulated into a power module with a double-layer structure. The power module is an independent electronic device, which is convenient for installation and replacement, and the manufacturing method is also simpler, which can be realized by general engineering personnel without the need for professional personnel to manufacture and install.

[0053] Embodiment 2:

[0054] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples. The present invention provides a method for manufacturing a power module, which is used to manufacture the power module in Example 1. Figure 3 , the method for manufacturing the power module includes:

[0055] S101, manufacturing an upper bracket and a lower bracket, wherein the upper bracket is provided with a first electrical connection portion, and the lower bracket is provided with a second electrical connection portion and a third electrical connection portion, and the second electrical connection portion and the third electrical connection portion are provided separately;

[0056] S102, installing a power circuit on the upper surface of the lower bracket, the power circuit comprising at least one power electronic unit, and the power circuit having a current input terminal, a current output terminal and a control terminal;

[0057] S103, assemble the upper bracket and the lower bracket up and down, and electrically connect the upper end of the second electrical connection part to the current input end of the power circuit on the upper surface of the lower bracket, electrically connect the upper end of the third electrical connection part to the current output end of the power circuit on the upper surface of the lower bracket, and electrically connect the lower end of the first electrical connection part to the control end of the power circuit on the upper surface of the lower bracket.

[0058] In some embodiments, the upper bracket and the lower bracket are provided with matching assembly structures, and the upper bracket and the lower bracket are assembled up and down to obtain an integral structure.

[0059] In some embodiments, after step S103, step S104 is also included, in which an insulating colloid is filled between the upper bracket and the lower bracket to enhance airtightness, waterproofness and shockproofness.

[0060] In some embodiments, the upper bracket produced in step S101 may also be provided with a fourth electrical connection part, and the fourth electrical connection part and the first electrical connection part are arranged separately; step S103 may also include: electrically connecting the lower end of the fourth electrical connection part to the upper end of the second electrical connection part or the current input end of the power circuit.

[0061] In some embodiments, the upper bracket manufactured in step S101 may also be separately provided with at least one fifth electrical connection part, and step S103 further includes: electrically connecting the upper end of the fifth electrical connection part to the external circuit, the first electrical connection part and / or the fourth electrical connection part. Each fifth electrical connection part, the fifth electrical connection part and the fourth electrical connection part, and the fifth electrical connection part and the first electrical connection part are separately provided. The separate provision includes but is not limited to providing an insulating part between the electrical connection parts.

[0062] In some embodiments, the upper end of the first electrical connection part, the upper end of the fourth electrical connection part and / or the upper end of the fifth electrical connection part are exposed on the upper surface of the upper bracket; the lower end of the second electrical connection part and / or the lower end of the third electrical connection part are exposed on the lower surface of the lower bracket.

[0063] In some embodiments, the lower end of the first electrical connection part, the lower end of the fourth electrical connection part and / or the lower end of the fifth electrical connection part are exposed on the lower surface of the upper bracket; the upper end of the second electrical connection part and / or the upper end of the third electrical connection part are exposed on the upper surface of the lower bracket.

[0064] In some embodiments, the lower end of the second electrical connection part is exposed to the lower surface of the lower bracket, and the lower end of the second electrical connection part is a plane. Optionally, the lower end plane of the second electrical connection part is 8-10 mm long and 2-4 mm wide, for example, 8 mm long and 2 mm wide, or 10 mm long and 4 mm wide. In some embodiments, the lower end of the third electrical connection part is exposed to the lower surface of the lower bracket, and the lower end of the third electrical connection part is a plane. Optionally, the lower end plane of the third electrical connection part is 8-12 mm long and 4-6 mm wide, for example, 10 mm long and 5 mm wide. Since the second electrical connection part and the third electrical connection part are often used to pass large currents, the lower ends are exposed to the lower surface of the lower bracket, and the lower ends are planes with a slightly larger area, which is conducive to connection with the external circuit and heat dissipation. The lower ends of the second electrical connection part and the lower ends of the third electrical connection part can be installed on the external circuit board in a manner close to the external circuit board, and the close manner makes it easier to dissipate heat.

[0065] In some embodiments, the upper end of the second electrical connection portion is exposed on the upper surface of the lower bracket, and the upper end of the second electrical connection portion is a plane. In some embodiments, the upper end of the third electrical connection portion is exposed on the upper surface of the lower bracket, and the upper end of the third electrical connection portion is a plane. The plane design facilitates connection with the current input terminal and the current output terminal of the power circuit. In some embodiments, the power circuit or the power electronic unit in the power circuit is installed at the upper end of the third electrical connection portion, and is in close contact with the upper end of the third electrical connection portion to facilitate heat dissipation.

[0066] In some embodiments, at least one of the first electrical connection part, the second electrical connection part, the third electrical connection part, the fourth electrical connection part, and the fifth electrical connection part is an integrated molded structure, such as a metal column, a metal block, etc. The integrated molding method can simplify the structure and facilitate circuit connections on the upper and lower surfaces of the upper bracket and the upper and lower surfaces of the lower bracket.

[0067] In some embodiments, since the fifth electrical connection portion is only used to make circuit connections on the upper surface of the upper bracket and does not need to extend into the interior or lower surface of the upper bracket, the fifth electrical connection portion can also be only arranged on the upper surface of the upper bracket, such as a copper layer plated on the upper surface of the upper bracket made of insulating material.

[0068] In some embodiments, the first electrical connection part and the fourth electrical connection part can also be arranged only on the upper surface or the lower surface of the upper bracket, and a through hole (or groove) can be arranged at the corresponding position of the upper bracket, and a metal wire or metal part can be arranged in the through hole (or groove) to connect to the other side of the upper bracket; the structure of the second electrical connection part and the third electrical connection part can also refer to this design.

[0069] In step S101 , an insulating substrate may be used to make the upper bracket or the lower bracket, or a metal substrate may be used to make the upper bracket or the lower bracket.

[0070] In some embodiments, step S101 uses an insulating substrate to make an upper bracket or a lower bracket. Taking the upper bracket as an example, an insulating substrate is first selected; secondly, a plurality of through holes (or grooves) are set on the insulating substrate, and finally, the first electrical connection part, the fourth electrical connection part, and each fifth electrical connection part are set in each through hole (or groove) in a one-to-one correspondence manner by copper deposition. Each electrical connection part is an integrated structure. Taking the first electrical connection part as an example, the first electrical connection part includes an upper end and a lower end, and a middle end connected therebetween. The upper end is exposed on the upper surface of the upper bracket, and the lower end is exposed on the lower surface of the upper bracket. The first electrical connection part passes through the upper and lower surfaces of the upper bracket. The first electrical connection part is a copper column, a copper block, etc. that passes through the upper and lower surfaces of the upper bracket. The structures of the fourth electrical connection part and the fifth electrical connection part refer to the structure of the first electrical connection part. The lower bracket can also be made in this way.

[0071] In some embodiments, step S101 uses a metal substrate to make an upper bracket or a lower bracket. Taking the upper bracket as an example, the metal substrate is selected first, and then the first electrical connection part, the fourth electrical connection part, and each fifth electrical connection part are set on the metal substrate. Finally, the area between each electrical connection part is removed and filled with an insulating part, and each electrical connection part is retained. The lower bracket can also be made in this way.

[0072] The power circuit is used to realize the preset function, and the power circuit includes at least one power electronic unit, and may also include other auxiliary electronic devices and auxiliary circuits, such as resistors, control circuits, etc. The power electronic unit 21 includes but is not limited to power electronic devices and power chips. The power electronic devices include but are not limited to power semiconductor devices, such as MOS tubes, thyristor transistors, insulated gate bipolar transistors (IGBT), etc. MOS tubes include but are not limited to silicon carbide MOS tubes.

[0073] In some embodiments, step S101 or S102 also includes making a first electrical connector, a second electrical connector and / or a third connector, and step S103 also includes: electrically connecting the upper end of the first electrical connector to the lower end of the first electrical connector, and electrically connecting the lower end of the first electrical connector to the control end of the power circuit; electrically connecting the upper end of the second electrical connector to the lower end of the fourth electrical connector, and electrically connecting the lower end of the second electrical connector to the upper end or the current input end of the second electrical connector; electrically connecting one end of the third connector to the current input end, and the other end to the upper end of the second electrical connector.

[0074] In this embodiment, the power circuit includes a power chip, which is a MOS tube chip, integrated with a MOS tube, the source S of the MOS tube is the current input end of the power circuit, the drain D of the MOS tube is the current output end of the power circuit, the gate G of the MOS tube is the control end of the power circuit, the drain D of the MOS tube is arranged on the lower surface of the MOS tube, the source S and the gate G of the MOS tube are arranged on the upper surface of the MOS tube, the MOS tube is installed at the upper end of the third electrical connection part 122, the drain D of the MOS tube is closely connected to the upper end of the third electrical connection part, the gate G of the MOS tube is electrically connected to the lower end of the first electrical connection part through the first electrical connection member, the source S of the MOS tube is electrically connected to the upper end of the second electrical connection part through the third electrical connection member, and the source S of the MOS tube is also electrically connected to the lower end of the fourth electrical connection part through the second electrical connection member.

[0075] The manufacturing method of the power module provided by the embodiment of the present invention is that the control end of the power circuit installed in the power module bracket is connected to the external circuit through the upper bracket, and the current input end and the current output end are respectively connected to the external circuit through the lower bracket, so as to realize the circuit layering of the power module, and the power module is powered on both sides for external connection; and the control end of the power circuit often flows through a small current, and the current input end and the current output end often flow through a large current, the small current is powered from the top of the power module, and the large current is powered from the bottom of the power module, so as to realize the layered arrangement of small current and large current, and such a power module is installed as an integral device, such as being installed on an external circuit board, and the lower end of the second electrical connection part and the lower end of the third electrical connection part on the lower surface of the lower bracket can be close to the external circuit board, which is conducive to the heat dissipation of large current. In addition, the overall circuit layout is more orderly, and the volume of the power module is reduced at the same time, and the power circuit is encapsulated into a power module with a double-layer structure. The power module is an independent electronic device, which is convenient for installation and replacement, and the manufacturing method is also simpler, which can be realized by general engineering personnel without the need for professional personnel to manufacture and install.

[0076] The above contents are further detailed descriptions of the embodiments of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A power module bracket, characterized in that: It includes an upper bracket and a lower bracket for upper and lower assembly, wherein: The upper bracket is provided with a first electrical connection portion; The lower bracket is provided with a second electrical connection portion and a third electrical connection portion, and the second electrical connection portion and the third electrical connection portion are provided separately; The upper surface of the lower bracket is used to install a power circuit, the power circuit includes at least one power electronic unit, and the power circuit has a current input terminal, a current output terminal and a control terminal; The upper end of the second electrical connection portion is used to be electrically connected to the current input end on the upper surface of the lower bracket, and the lower end is used to be electrically connected to an external current input circuit; The upper end of the third electrical connection portion is used to be electrically connected to the current output end on the upper surface of the lower bracket, and the lower end is used to be electrically connected to an external current output circuit; The lower end of the first electrical connection portion is used to be electrically connected to the control end on the upper surface of the lower bracket, and the upper end is used to be electrically connected to an external driving circuit.

2. The power module bracket according to claim 1, characterized in that: The upper bracket is also provided with a fourth electrical connection part, and the fourth electrical connection part and the first electrical connection part are provided separately; the lower end of the fourth electrical connection part is used to be electrically connected to the upper end of the second electrical connection part or the current input end, and the upper end is used to be electrically connected to an external circuit.

3. The power module bracket according to claim 1, characterized in that: The upper bracket is also separately provided with at least one fifth electrical connection part, and the upper end of the fifth electrical connection part is used to be electrically connected to an external circuit, the first electrical connection part and / or the fourth electrical connection part.

4. The power module bracket according to claim 3, characterized in that: The upper bracket is separately provided with three fifth electrical connection parts, wherein the upper ends of two fifth electrical connection parts are used to connect the thermistor and the protection circuit; the upper end of another fifth electrical connection part is used to connect between the external drive circuit and one end of the gate resistor, and the other end of the gate resistor is electrically connected to the upper end of the first electrical connection part.

5. The power module bracket according to any one of claims 1 to 4, characterized in that: The upper end of the first electrical connection part, the upper end of the fourth electrical connection part and / or the upper end of the fifth electrical connection part are exposed on the upper surface of the upper bracket; the lower end of the second electrical connection part and / or the lower end of the third electrical connection part are exposed on the lower surface of the lower bracket.

6. The power module bracket according to claim 5, characterized in that: The lower end of the first electrical connection part, the lower end of the fourth electrical connection part and / or the lower end of the fifth electrical connection part are exposed on the lower surface of the upper bracket; the upper end of the second electrical connection part and / or the upper end of the third electrical connection part are exposed on the upper surface of the lower bracket.

7. The power module bracket according to claim 6, characterized in that: At least one of the first electrical connection portion, the second electrical connection portion, the third electrical connection portion, the fourth electrical connection portion, and the fifth electrical connection portion is an integrally formed structure.

8. A power module, characterized in that: The power module bracket according to any one of claims 1 to 7 further comprises a power circuit, wherein: The power circuit is mounted on the upper surface of the lower bracket of the power module bracket, the power circuit includes at least one power electronic unit, and the power circuit has a current input terminal, a current output terminal and a control terminal; The upper end of the second electrical connection portion of the power module bracket is electrically connected to the current input end of the power circuit, and the lower end is used to be electrically connected to an external current input circuit; The upper end of the third electrical connection portion of the power module bracket is electrically connected to the current output end of the power circuit, and the lower end is used to be electrically connected to an external current output circuit; The lower end of the first electrical connection portion of the power module bracket is electrically connected to the control end of the power circuit, and the upper end is used to be electrically connected to an external driving circuit.

9. The power module according to claim 8, characterized in that: It also includes a first electrical connector, a second electrical connector and / or a third connector, wherein the upper end of the first electrical connector is electrically connected to the lower end of the first electrical connector, and the lower end of the first electrical connector is electrically connected to the control end of the power circuit; the upper end of the second electrical connector is electrically connected to the lower end of the fourth electrical connector, and the lower end of the second electrical connector is electrically connected to the upper end of the second electrical connector or the current input end; one end of the third connector is electrically connected to the current input end, and the other end is electrically connected to the upper end of the second electrical connector.

10. A method for manufacturing a power module, used for manufacturing the power module according to claim 8 or 9, the method for manufacturing the power module comprising: S101, manufacturing an upper bracket and a lower bracket, wherein the upper bracket is provided with a first electrical connection portion, and the lower bracket is provided with a second electrical connection portion and a third electrical connection portion, and the second electrical connection portion and the third electrical connection portion are provided separately; S102, installing a power circuit on the upper surface of the lower bracket, wherein the power circuit includes at least one power electronic unit, and the power circuit has a current input terminal, a current output terminal, and a control terminal; S103, assemble the upper bracket and the lower bracket up and down, and electrically connect the upper end of the second electrical connection part to the current input end on the upper surface of the lower bracket, electrically connect the upper end of the third electrical connection part to the current output end on the upper surface of the lower bracket, and electrically connect the lower end of the first electrical connection part to the control end on the upper surface of the lower bracket.

11. The method for manufacturing a power module according to claim 10, wherein: The upper bracket is also provided with a fourth electrical connection part, and the fourth electrical connection part and the first electrical connection part are provided separately; the step S103 also includes: electrically connecting the lower end of the fourth electrical connection part with the upper end of the second electrical connection part or the current input end of the power circuit.

12. The method for manufacturing a power module according to claim 11, wherein: The upper bracket is also separately provided with at least one fifth electrical connection part, and the step S103 further includes: electrically connecting the upper end of the fifth electrical connection part to an external circuit, the first electrical connection part and / or the fourth electrical connection part.

13. The method for manufacturing a power module according to any one of claims 10 to 12, characterized in that: The upper end of the first electrical connection part, the upper end of the fourth electrical connection part and / or the upper end of the fifth electrical connection part are exposed on the upper surface of the upper bracket; the lower end of the second electrical connection part and / or the lower end of the third electrical connection part are exposed on the lower surface of the lower bracket.

14. The method for manufacturing a power module according to claim 13, wherein: The lower end of the first electrical connection part, the lower end of the fourth electrical connection part and / or the lower end of the fifth electrical connection part are exposed on the lower surface of the upper bracket; the upper end of the second electrical connection part and / or the upper end of the third electrical connection part are exposed on the upper surface of the lower bracket.

15. The method for manufacturing a power module according to claim 14, wherein: At least one of the first electrical connection portion, the second electrical connection portion, the third electrical connection portion, the fourth electrical connection portion, and the fifth electrical connection portion is an integrally formed structure.

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