Power module and power module group

Abstract

The invention discloses a power module and a power module group, and the power module comprises a first half-bridge power unit and a second half-bridge power unit, and the first half-bridge power unit and the second half-bridge power unit are sealed in the same power module. The power module includes: a substrate; the wiring layer is positioned on the substrate; the first half-bridge power unit comprises a first upper-bridge power unit and a first lower-bridge power unit, and the second half-bridge power unit comprises a second upper-bridge power unit and a second lower-bridge power unit which are located on the corresponding wiring areas respectively, so that the power density of the power module is improved; the power module comprises a plurality of power modules, and the power modules are located on the same bottom plate, so that the power module does not need integral plastic package or glue pouring, is simple and convenient to manufacture, can better realize modularization, and is flexible in application.

Description

Technical Field

[0001] This invention relates to the field of semiconductor technology, and in particular to a power module and a power assembly. Background Technology

[0002] Power modules are power semiconductor devices used in power electronic systems to control electrical energy conversion. They are widely used in electric drive systems for new energy vehicles, industrial inverters, and other applications. For example, in a new energy motor controller system, the power module is the most critical component. Each motor controller typically requires a three-phase full-bridge circuit for control. Commonly, this circuit can be implemented by combining three half-bridge power modules; alternatively, it can be implemented by a single three-phase full-bridge power module with three substrates, each containing a half-bridge circuit.

[0003] Specifically, hybrid electric vehicles (HEVs) have two motors (a generator and a motor) in their dual-motor system, requiring control by two three-phase full-bridge power circuits. Currently, the common market solution uses two independent three-phase full-bridge power modules (such as two HPD power modules) to control the two motors separately, with each module having three base plates, each containing a half-bridge circuit. However, the large size of two three-phase full-bridge power modules composed of six half-bridge base plates limits the power density of the electric drive system in HEVs. HEVs require a smaller electric drive system to optimize interior space, reduce vehicle weight, and increase driving range. Therefore, it is necessary to develop a smaller power module solution for the dual-electric control system of HEVs. Summary of the Invention

[0004] This invention proposes a power module or power unit that is small in size and has high power density.

[0005] This invention provides a power module, comprising: a first half-bridge power unit and a second half-bridge power unit, wherein the first half-bridge power unit and the second half-bridge power unit are encapsulated in the same power module; the power module includes: substrate; The wiring layer is located on the first surface of the substrate and includes a first wiring region, a second wiring region, a third wiring region and a fourth wiring region. The first half-bridge power unit includes: a first upper bridge power unit and a first lower bridge power unit; the second half-bridge power unit includes: a second upper bridge power unit and a second lower bridge power unit; the first upper bridge power unit is located in the first wiring area; the first lower bridge power unit is located in the second wiring area; the second upper bridge power unit is located in the third wiring area; and the second lower bridge power unit is located in the fourth wiring area. The second and fourth cabling areas are isolated from each other on the cabling layer.

[0006] Preferably, the first wiring area and the third wiring area are isolated from each other.

[0007] Preferably, the first wiring area and the third wiring area are an integral structure and electrically connected.

[0008] Preferably, the power module further includes: The power terminals include a DC positive terminal, a DC negative terminal, a first AC terminal, and a second AC terminal. The DC positive terminal is electrically connected to the third terminal of the first upper bridge power unit, the first AC terminal is electrically connected to the second terminal of the first upper bridge power unit and the third terminal of the first lower bridge power unit, and the DC negative terminal is electrically connected to the second terminal of the first lower bridge power unit. The DC positive terminal is electrically connected to the third terminal of the second upper bridge power unit, the second AC terminal is electrically connected to the second terminal of the second upper bridge power unit and the third terminal of the second lower bridge power unit, and the DC negative terminal is electrically connected to the second terminal of the second lower bridge power unit.

[0009] Preferably, the DC negative terminal includes a first DC negative terminal and a second DC negative terminal.

[0010] Preferably, at least one DC positive terminal is led out from the first surface of the power module, and the first surface of the power module is parallel to the substrate.

[0011] Preferably, the first upper bridge power unit is also electrically connected to the first signal terminal, the first lower bridge power unit is also electrically connected to the second signal terminal, the second upper bridge power unit is also electrically connected to the third signal terminal, and the second lower bridge power unit is also electrically connected to the fourth signal terminal.

[0012] Preferably, the first DC negative terminal, the second signal terminal, the fourth signal terminal, and the second DC negative terminal are arranged sequentially on the first side of the power module.

[0013] Preferably, the second signal terminal, the DC negative terminal, and the fourth signal terminal are arranged sequentially on the first side of the power module.

[0014] Preferably, the second signal terminal, at least two DC negative terminals, and the fourth signal terminal are arranged sequentially on the first side of the power module.

[0015] Preferably, the first DC negative terminal, the second signal terminal, the second DC negative terminal, and the fourth signal terminal are arranged sequentially on the first side of the power module.

[0016] Preferably, the second signal terminal, the first DC negative terminal, the fourth signal terminal, and the second DC negative terminal are arranged sequentially on the first side of the power module.

[0017] Preferably, the first AC terminal, the first signal terminal, the second signal terminal, and the second AC terminal are arranged sequentially on the second side of the power module.

[0018] Preferably, the first signal terminal, the first AC terminal, the second AC terminal, and the third signal terminal are arranged sequentially on the second side of the power module.

[0019] Preferably, the first AC terminal, the first signal terminal, the second AC terminal, and the third signal terminal are arranged sequentially on the second side of the power module.

[0020] Preferably, the first signal terminal, the first AC terminal, the third signal terminal, and the second AC terminal are arranged sequentially on the second side of the power module.

[0021] Preferably, there is one or three positive DC terminals, and the positive DC terminals are at the same potential.

[0022] Preferably, the first DC negative terminal is divided into multiple parts, and / or the second DC negative terminal is divided into multiple parts.

[0023] Preferably, the first AC terminal is divided into multiple parts, and / or the second AC terminal is divided into multiple parts.

[0024] Preferably, the first upper bridge power unit, the first lower bridge power unit, the second upper bridge power unit, and the second lower bridge power unit each include one or more power devices connected in parallel, and each power device in the first upper bridge power unit, the first lower bridge power unit, the second upper bridge power unit, and the second lower bridge power unit includes a first terminal, a second terminal, and a third terminal.

[0025] Preferably, the first signal terminal includes a first gate terminal, the second signal terminal includes a second gate terminal, the third signal terminal includes a third gate terminal, and the fourth signal terminal includes a fourth gate terminal; The first gate terminal is electrically connected to the first end of the power device in the first upper bridge power unit, the second gate terminal is electrically connected to the first end of the power device in the first lower bridge power unit, the third gate terminal is electrically connected to the first end of the power device in the second upper bridge power unit, and the fourth gate terminal is electrically connected to the first end of the power device in the second lower bridge power unit.

[0026] Preferably, the power module further includes: a first interconnection structure and a second interconnection structure, one end of the first interconnection structure is electrically connected to the second end of the first upper bridge power unit, and the other end of the first interconnection structure serves as a first AC terminal; one end of the second interconnection structure is electrically connected to the second end of the first lower bridge power unit, and the other end of the second interconnection structure serves as a first DC negative terminal. When the first half-bridge of the power module is commutated, the commutation current flows through the DC positive terminal, the first wiring area, the third terminal of the first upper bridge power unit, the second terminal of the first upper bridge power unit, the first interconnection structure, the second wiring area, the third terminal of the first lower bridge power device, the second terminal of the first lower bridge power unit, the second interconnection structure, and the DC negative terminal.

[0027] Preferably, the power module further includes: a third interconnection structure and a fourth interconnection structure, one end of the third interconnection structure is electrically connected to the second end of the second upper bridge power unit, and the other end of the third interconnection structure serves as a second AC terminal; one end of the fourth interconnection structure is electrically connected to the second end of the second lower bridge power unit, and the other end of the fourth interconnection structure serves as a second DC negative terminal. During the second half-bridge commutation of the power module, the commutation current flows through the DC positive terminal, the third wiring area, the third terminal of the second upper bridge power unit, the second terminal of the second upper bridge power unit, the third interconnection structure, the fourth wiring area, the third terminal of the second lower bridge power device, the second terminal of the second lower bridge power unit, the fourth interconnection structure, and the DC negative terminal.

[0028] Preferably, the power module further includes a molding compound that encapsulates the substrate, wiring layer, and power device unit, the molding compound having opposing upper and lower surfaces.

[0029] Preferably, the DC positive terminal is a conductive block exposed on the first surface of the encapsulation.

[0030] Preferably, the power module further includes: The conductive contact structure includes an upper surface and a lower surface opposite each other, and the lower surface of the conductive contact structure is connected to a second part of the DC positive terminal.

[0031] Preferably, a groove is provided between the lower surface of the conductive contact structure and the upper surface of the encapsulation.

[0032] Preferably, the power module further includes an insulation layer located between the lower surface of the conductive contact structure and the upper surface of the encapsulation.

[0033] Preferably, the power module includes three DC positive terminals, a conductive contact structure, and two grooves.

[0034] Preferably, the power module includes a DC positive terminal, a conductive contact structure, and two grooves.

[0035] Preferably, the substrate is an insulating ceramic substrate with a three-layer structure, including a wiring layer, an insulating layer, and a bottom copper layer.

[0036] Preferably, the substrate includes only a wiring layer.

[0037] Preferably, the power device in the first half-bridge power unit is either a parallel structure of an insulated-gate field-effect transistor and a freewheeling diode or an insulated-gate field-effect transistor, and the power device in the second half-bridge power unit is a silicon carbide metal-oxide-semiconductor field-effect transistor.

[0038] Preferably, the power devices in the first half-bridge power unit and the second half-bridge power unit are either a parallel structure of an insulated-gate field-effect transistor and a freewheeling diode or an insulated-gate field-effect transistor.

[0039] Preferably, the power devices in the first half-bridge power unit and the second half-bridge power unit are both silicon carbide metal oxide semiconductor field-effect transistors.

[0040] Preferably, the power module includes: Base plate; Multiple power modules are located on the first surface of the base plate, and the power modules are the power modules of any one of claims 1 to 35.

[0041] Preferably, a heat dissipation structure is provided on the second side of the base plate.

[0042] Preferably, there are three power modules, and the power module group includes a first power module, a second power module, and a third power module; The first power module, the second power module, and the third power module form two three-phase full-bridge power units.

[0043] Preferably, the power module includes a power generation unit and an inverter unit. The power generation unit includes a first half-bridge power unit of the first power module, a second half-bridge power unit of the first power module, and a first half-bridge power unit of the second power module. The inverter unit includes a second half-bridge power unit of the second power module, a first half-bridge power unit of the third power module, and a second half-bridge power unit of the third power module.

[0044] Preferably, the power module includes a power generation unit and an inverter unit. The power generation unit includes a first half-bridge power unit of a first power module, a first half-bridge power unit of a second power module, and a first half-bridge power unit of a third power module. The inverter unit includes a second half-bridge power unit of a first power module, a second half-bridge power unit of a second power module, and a second half-bridge power unit of a third power module.

[0045] Preferably, the power module includes a first inverter unit and a second inverter unit. The first inverter unit includes a first half-bridge power unit of the first power module, a second half-bridge power unit of the first power module, and a first half-bridge power unit of the second power module. The second inverter unit includes a second half-bridge power unit of the second power module, a first half-bridge power unit of the third power module, and a second half-bridge power unit of the third power module.

[0046] Preferably, the power module includes a first inverter unit and a second inverter unit. The first inverter unit includes a first half-bridge power unit of the first power module, a first half-bridge power unit of the second power module, and a first half-bridge power unit of the third power module. The second inverter unit includes a second half-bridge power unit of the first power module, a second half-bridge power unit of the second power module, and a second half-bridge power unit of the third power module.

[0047] Preferably, the power module further includes a fourth power module.

[0048] Preferably, the power module further includes a DC-DC module, which includes a fourth power module.

[0049] The power module of this application includes: a first half-bridge power unit and a second half-bridge power unit, which are encapsulated in the same power module; the power module includes: a substrate; a wiring layer located on a first surface of the substrate, the wiring layer including a first wiring area, a second wiring area, a third wiring area, and a fourth wiring area; the first half-bridge power unit includes: a first upper bridge power unit and a first lower bridge power unit, the second half-bridge power unit includes: a second upper bridge power unit and a second lower bridge power unit, the first upper bridge power unit being located in the first wiring area, the first lower bridge power unit being located in the second wiring area, the second upper bridge power unit being located in the third wiring area, and the second lower bridge power unit being located in the fourth wiring area; wherein, the second wiring area and the fourth wiring area are isolated from each other on the wiring layer, reducing the volume, increasing the power density of the power module, and achieving a smaller size while having the same function; Furthermore, the power module of this application includes: multiple power modules, preferably three power modules, forming a power module including six half-bridge power units. The six half-bridge power units constitute two three-phase full-bridge power units. The three power modules are located on the same base plate without the need for overall plastic encapsulation or potting, which simplifies manufacturing, allows for better modularization, and provides flexible application. The power module can be applied to the electric drive system of pure electric vehicles or hybrid electric vehicles, etc. Attached Figure Description

[0050] The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings, in which: Figure 1 The circuit topology diagram of the power module provided for this invention; Figure 2 A side view of the power module provided by the present invention; Figure 3 This is a schematic diagram of the structure of a power module according to a first embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the power module in Embodiment 2 provided by the present invention; Figure 5 A schematic diagram of the structure of the power module in Embodiment 3 provided by the present invention; Figures 6 to 21 A schematic diagram of the terminal arrangement of the power module provided by the present invention; Figure 22 An exploded view of the power module provided by this invention; Figure 23 The current path of the power module commutation circuit provided by the present invention; Figures 24 to 31 This is a schematic diagram of the power module terminal arrangement provided by the present invention; Figure 32 A schematic diagram of the power module structure provided by the present invention. Detailed Implementation

[0051] The invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale. Furthermore, some well-known parts may not be shown.

[0052] This invention can be presented in various forms, some of which will be described below.

[0053] This invention provides a power module, such as Figures 3 to 5 As shown, the power module includes: a first half-bridge power unit 201 and a second half-bridge power unit 202, which are encapsulated in the same power module; as Figure 2 As shown, the power module includes: substrate 100; Wiring layer 101, the wiring layer is located on the first surface of the substrate, such as Figure 3 As shown, the wiring layer includes a first wiring area 101-1, a second wiring area 101-2, a third wiring area 101-3, and a fourth wiring area 101-4; like Figures 3 to 5 As shown, the first half-bridge power unit 201 includes a first upper bridge power unit 201-1 and a first lower bridge power unit 201-2, and the second half-bridge power unit 202 includes a second upper bridge power unit 202-1 and a second lower bridge power unit 202-2. The first upper bridge power unit 201-1 is located in the first wiring area 101-1, the first lower bridge power unit 201-2 is located in the second wiring area 101-2, the second upper bridge power unit 202-1 is located in the third wiring area 101-3, and the second lower bridge power unit 202-2 is located in the fourth wiring area 101-4. The second cabling area 101-2 and the fourth cabling area 101-4 are isolated from each other on the cabling layer.

[0054] The first wiring area 101-1 and the third wiring area 101-3 are isolated from each other but electrically connected.

[0055] The first wiring area 101-1 and the third wiring area 101-3 are a single structure.

[0056] The power module also includes: like Figures 6 to 21 As shown, the power terminals include a DC positive terminal (DC+), a DC negative terminal (DC-), a first AC terminal (AC1), and a second AC terminal (AC2). For simplicity... Figure 3 , Figure 4 , Figure 5 The power terminals are not shown. Figure 3 , Figure 4 , Figure 5 power terminals and Figures 6 to 21 The corresponding power terminals shown are the same.

[0057] like Figure 1 As shown, the DC positive terminal DC+ is electrically connected to the third terminal of the first upper bridge power unit 201-1, the first AC terminal AC1 is electrically connected to the second terminal of the first upper bridge power unit 201-1 and the third terminal of the first lower bridge power unit 201-2, and the DC negative terminal DC- is electrically connected to the second terminal of the first lower bridge power unit 201-2. The DC positive terminal DC+ is electrically connected to the third terminal of the second upper bridge power unit 202-1, the second AC terminal AC2 is electrically connected to the second terminal of the second upper bridge power unit 202-1 and the third terminal of the second lower bridge power unit 202-2, and the DC negative terminal DC- is electrically connected to the second terminal of the second lower bridge power unit 202-2.

[0058] like Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figures 10 to 17 , Figure 20 , Figure 21 As shown, the DC negative terminal DC- includes a first DC negative terminal DC- (1) and a second DC negative terminal DC- (2).

[0059] like Figures 3 to 21 As shown, at least one DC positive terminal DC+ is led out from the first surface of the power module, and the first surface of the power module is parallel to the substrate 100.

[0060] like Figures 6 to 21 As shown, the first upper bridge power unit 201-1 further includes a first signal terminal 301, the first lower bridge power unit 201-2 further includes a second signal terminal 302, the second upper bridge power unit 202-1 further includes a third signal terminal 303, and the second lower bridge power unit 202-2 further includes a fourth signal terminal 304.

[0061] like Figure 6 , Figure 7 , Figure 20 , Figure 21 The first DC negative terminal DC- (1), the second signal terminal 302, the fourth signal terminal 304, and the second DC negative terminal DC- (2) are arranged sequentially on the first side of the power module.

[0062] like Figure 8 , Figure 9 , Figure 18 , Figure 19 The second signal terminal 302, the DC negative terminal DC-, and the fourth signal terminal 304 are arranged sequentially on the first side of the power module.

[0063] like Figure 8 , Figure 9 , Figure 18 , Figure 19 The second signal terminal 302, at least two DC negative terminals DC-, and the fourth signal terminal 304 are arranged sequentially on the first side of the power module.

[0064] like Figure 10 , Figure 11 , Figure 14 , Figure 15 The first DC negative terminal DC- (1), the second signal terminal 302, the second DC negative terminal DC- (2), and the fourth signal terminal 304 are arranged sequentially on the first side of the power module.

[0065] like Figure 12 , Figure 13 , Figure 16 , Figure 17 The second signal terminal 302, the first DC negative terminal DC- (1), the fourth signal terminal 304, and the second DC negative terminal DC- (2) are arranged sequentially on the first side of the power module.

[0066] like Figure 6 , Figure 7 , Figure 18 , Figure 19 The first AC terminal, the first signal terminal, the second signal terminal, and the second AC terminal are arranged sequentially on the second side of the power module.

[0067] like Figure 8 , Figure 9 , Figure 20 , Figure 21 The first signal terminal, the first AC terminal, the second AC terminal, and the third signal terminal are arranged sequentially on the second side of the encapsulation.

[0068] like Figure 10 , Figure 11 , Figure 16 , Figure 17The first AC terminal, the first signal terminal, the second AC terminal, and the third signal terminal are arranged sequentially on the second side of the encapsulation.

[0069] like Figure 12 , Figure 13 , Figure 14 , Figure 15 The first signal terminal, the first AC terminal, the third signal terminal, and the second AC terminal are arranged sequentially on the second side of the encapsulation.

[0070] like Figures 3 to 21 As shown, there are 1 or 3 DC positive terminals, and the DC positive terminals are at the same potential.

[0071] The first DC negative terminal DC-(1) is divided into multiple parts, and / or the second DC negative terminal DC-(2) is divided into multiple parts.

[0072] The first AC terminal AC1 is divided into multiple parts, and / or the second AC terminal AC2 is divided into multiple parts.

[0073] like Figures 1 to 21 As shown, the first upper bridge power unit 201-1, the first lower bridge power unit 201-2, the second upper bridge power unit 202-1, and the second lower bridge power unit 202-2 each include one or more power devices connected in parallel. Each power device in the first upper bridge power unit 201-1, the first lower bridge power unit 201-2, the second upper bridge power unit 202-1, and the second lower bridge power unit 202-2 includes a first terminal, a second terminal, and a third terminal.

[0074] like Figures 6 to 21 As shown, the first signal terminal 301 includes a first gate terminal 301-1, the second signal terminal 302 includes a second gate terminal 302-2, the third signal terminal 303 includes a third gate terminal 303-1, and the fourth signal terminal 304 includes a fourth gate terminal 304-1. The first gate terminal 301-1 is electrically connected to the first end of the power device in the first upper bridge power unit 201-1, the second gate terminal 302-1 is electrically connected to the first end of the power device in the first lower bridge power unit 201-2, the third gate terminal 303-1 is electrically connected to the first end of the power device in the second upper bridge power unit 202-1, and the fourth gate terminal 304-1 is electrically connected to the first end of the power device in the second lower bridge power unit 202-2.

[0075] The first terminal of the power device in the first upper bridge power unit 201-1, the first terminal of the power device in the first lower bridge power unit 201-2, the first terminal of the power device in the second upper bridge power unit 202-1, and the first terminal of the power device in the second lower bridge power unit 202-2 are gates, and are respectively controlled by four different first gate terminals 301-1, second gate terminals 302-1, third gate terminals 303-1, and fourth gate terminals 304-1.

[0076] like Figure 23 As shown, the power module also includes: a first interconnection structure 305 and a second interconnection structure 306. One end of the first interconnection structure 305 is electrically connected to the second end of the first upper bridge power unit 201-1, and the other end of the first interconnection structure 305 serves as a first AC terminal AC1. One end of the second interconnection structure 306 is electrically connected to the second end of the first lower bridge power unit 201-2, and the other end of the second interconnection structure 306 serves as a first DC negative terminal AC2. During the first half-bridge commutation of the power module, the commutation current flows through the DC positive terminal DC+, the first wiring area 101-1, the third terminal of the first upper bridge power unit 201-1, the second terminal of the first upper bridge power unit 201-1, the first interconnection structure 305, the second wiring area 101-2, the third terminal of the first lower bridge power device 201-2, the second terminal of the first lower bridge power unit 201-2, the second interconnection structure 306, and the DC negative terminal DC-. like Figure 23 As shown, the power module also includes: a third interconnection structure 307 and a fourth interconnection structure 308. One end of the third interconnection structure 307 is electrically connected to the second end of the second upper bridge power unit 202-1, and the other end of the third interconnection structure 307 serves as the second AC terminal AC2. One end of the fourth interconnection structure 308 is electrically connected to the second end of the second lower bridge power unit 202-2, and the other end of the fourth interconnection structure 308 serves as the second DC negative terminal AC2. During the second half-bridge commutation of the power module, the commutation current flows through the DC positive terminal DC+, the third wiring area 101-3, the third terminal of the second upper bridge power unit 202-1, the second terminal of the second upper bridge power unit 202-1, the third interconnection structure 307, the fourth wiring area 101-4, the third terminal of the second lower bridge power device 202-2, the second terminal of the second lower bridge power unit 202-2, the fourth interconnection structure 308, and the DC negative terminal DC-.

[0077] like Figure 2 As shown in the figure, the power module also includes a molding compound 400, which covers the substrate 100, the wiring layer 101 and the power device unit. The molding compound 400 includes an upper surface and a lower surface opposite to each other.

[0078] like Figure 22As shown, the DC positive terminal DC+ is a conductive block exposed on the first surface of the encapsulation 400.

[0079] like Figure 22 As shown, the power module also includes: The conductive contact structure 500 includes an upper surface and a lower surface opposite each other, and the lower surface of the conductive contact structure 500 is connected to a second part of the DC positive terminal DC+.

[0080] A groove is provided between the lower surface of the conductive contact structure 500 and the upper surface of the encapsulation body 400, which is not shown in the figure.

[0081] The power module also includes an insulation layer located between the lower surface of the conductive contact structure and the upper surface of the encapsulation.

[0082] The power module includes three DC positive terminals DC+, a conductive contact structure 500, and two recesses.

[0083] The power module includes a DC positive terminal DC+, a conductive contact structure 500, and two recesses.

[0084] like Figure 2 As shown, the substrate 100 is an insulating ceramic substrate with a three-layer structure, including a wiring layer 101, an insulating layer, and a bottom copper layer.

[0085] The substrate 100 may also include only the wiring layer 101.

[0086] like Figure 3 As shown, the power device in the first half-bridge power unit is either a parallel structure of an insulated-gate field-effect transistor and a freewheeling diode or an insulated-gate field-effect transistor, while the power device in the second half-bridge power unit is a silicon carbide metal-oxide-semiconductor field-effect transistor.

[0087] like Figure 4 As shown, the power devices in the first half-bridge power unit and the second half-bridge power unit are either a parallel structure of an insulated-gate field-effect transistor and a freewheeling diode or one of an insulated-gate field-effect transistors.

[0088] like Figure 5 As shown, the power devices in the first half-bridge power unit and the second half-bridge power unit are both silicon carbide metal oxide semiconductor field-effect transistors.

[0089] like Figures 24 to 31 As shown, the power module includes: Base plate 600; Multiple power modules are located on the first surface of the base plate 600, and the power modules are the power modules of any one of claims 1 to 35.

[0090] like Figures 24 to 31 As shown, a heat dissipation structure is provided on the second side of the base plate 600.

[0091] like Figures 24 to 31 As shown, there are three power modules, including a first power module, a second power module, and a third power module. The first power module, the second power module, and the third power module form two three-phase full-bridge power units.

[0092] like Figures 24 to 31 As shown, the power module includes a power generation unit and an inverter unit. The power generation unit includes a first half-bridge power unit 201 of the first power module, a second half-bridge power unit 202 of the first power module, and a first half-bridge power unit 203 of the second power module. The inverter unit includes a second half-bridge power unit 204 of the second power module, a first half-bridge power unit 205 of the third power module, and a second half-bridge power unit 206 of the third power module.

[0093] like Figures 24 to 31 As shown, the power module includes a power generation unit and an inverter unit. The power generation unit includes a first half-bridge power unit 201 of the first power module, a first half-bridge power unit 203 of the second power module, and a first half-bridge power unit 205 of the third power module. The inverter unit includes a second half-bridge power unit 202 of the first power module, a second half-bridge power unit 204 of the second power module, and a second half-bridge power unit 206 of the third power module.

[0094] like Figures 24 to 31 As shown, the power module includes a first inverter unit and a second inverter unit. The first inverter unit includes a first half-bridge power unit 201 of the first power module, a second half-bridge power unit 202 of the first power module, and a first half-bridge power unit 203 of the second power module. The second inverter unit includes a second half-bridge power unit 204 of the second power module, a first half-bridge power unit 205 of the third power module, and a second half-bridge power unit 206 of the third power module.

[0095] like Figures 24 to 31 As shown, the power module includes a first inverter unit and a second inverter unit. The first inverter unit includes a first half-bridge power unit 201 of the first power module, a first half-bridge power unit 203 of the second power module, and a first half-bridge power unit 205 of the third power module. The second inverter unit includes a second half-bridge power unit 202 of the first power module, a second half-bridge power unit 204 of the second power module, and a second half-bridge power unit 206 of the third power module.

[0096] like Figure 32 As shown, the power module also includes a fourth power module.

[0097] like Figure 32 As shown, the power module also includes a DC-DC module, which includes a fourth power module.

[0098] As described above, these embodiments of the present invention do not exhaustively cover all details, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A power module, characterized in that, include: The first half-bridge power unit and the second half-bridge power unit are packaged together in the same power module; The power module includes: substrate; A wiring layer is located on a first surface of the substrate, and the wiring layer includes a first wiring area, a second wiring area, a third wiring area, and a fourth wiring area. The first half-bridge power unit includes a first upper-bridge power unit and a first lower-bridge power unit, and the second half-bridge power unit includes a second upper-bridge power unit and a second lower-bridge power unit. The first upper-bridge power unit is located in the first wiring area, the first lower-bridge power unit is located in the second wiring area, the second upper-bridge power unit is located in the third wiring area, and the second lower-bridge power unit is located in the fourth wiring area. The second wiring area and the fourth wiring area are isolated from each other on the wiring layer.

2. The power module according to claim 1, characterized in that, The first wiring area and the third wiring area are isolated from each other.

3. The power module according to claim 1, characterized in that, The first wiring area and the third wiring area are an integral structure and are electrically connected.

4. The power module according to claim 1, characterized in that, The power module also includes: The power terminals include a DC positive terminal, a DC negative terminal, a first AC terminal, and a second AC terminal; The DC positive terminal is electrically connected to the third terminal of the first upper bridge power unit, the first AC terminal is electrically connected to the second terminal of the first upper bridge power unit and the third terminal of the first lower bridge power unit, and the DC negative terminal is electrically connected to the second terminal of the first lower bridge power unit. The DC positive terminal is electrically connected to the third terminal of the second upper bridge power unit, the second AC terminal is electrically connected to the second terminal of the second upper bridge power unit and the third terminal of the second lower bridge power unit, and the DC negative terminal is electrically connected to the second terminal of the second lower bridge power unit.

5. The power module according to claim 4, characterized in that, The DC negative terminal includes a first DC negative terminal and a second DC negative terminal.

6. The power module according to claim 4, characterized in that, At least one DC positive terminal is led out from the first surface of the power module, the first surface of the power module being parallel to the substrate.

7. The power module according to claim 4, characterized in that, The first upper bridge power unit is also electrically connected to the first signal terminal, the first lower bridge power unit is also electrically connected to the second signal terminal, the second upper bridge power unit is also electrically connected to the third signal terminal, and the second lower bridge power unit is also electrically connected to the fourth signal terminal.

8. The power module according to claim 7, characterized in that, The first DC negative terminal, the second signal terminal, the fourth signal terminal, and the second DC negative terminal are arranged sequentially on the first side of the power module.

9. The power module according to claim 7, characterized in that, The second signal terminal, the DC negative terminal, and the fourth signal terminal are arranged sequentially on the first side of the power module.

10. The power module according to claim 7, characterized in that, The second signal terminal, at least two DC negative terminals, and the fourth signal terminal are arranged sequentially on the first side of the power module.

11. The power module according to claim 7, characterized in that, The first DC negative terminal, the second signal terminal, the second DC negative terminal, and the fourth signal terminal are arranged sequentially on the first side of the power module.

12. The power module according to claim 7, characterized in that, The second signal terminal, the first DC negative terminal, the fourth signal terminal, and the second DC negative terminal are arranged sequentially on the first side of the power module.

13. The power module according to claims 8 to 12, characterized in that, The first AC terminal, the first signal terminal, the second signal terminal, and the second AC terminal are arranged sequentially on the second side of the power module.

14. The power module according to claims 8 to 12, characterized in that, The first signal terminal, the first AC terminal, the second AC terminal, and the third signal terminal are arranged sequentially on the second side of the power module.

15. The power module according to claims 8 to 12, characterized in that, The first AC terminal, the first signal terminal, the second AC terminal, and the third signal terminal are arranged sequentially on the second side of the power module.

16. The power module according to claims 8 to 12, characterized in that, The first signal terminal, the first AC terminal, the third signal terminal, and the second AC terminal are arranged sequentially on the second side of the power module.

17. The power module according to claim 6, characterized in that, The DC positive terminal can be one or three. When there are three DC positive terminals, the DC positive terminals are at the same potential.

18. The power module according to claim 4, characterized in that, The first DC negative terminal is divided into multiple parts, and / or the second DC negative terminal is divided into multiple parts.

19. The power module according to claim 4, characterized in that, The first AC terminal is divided into multiple parts, and / or the second AC terminal is divided into multiple parts.

20. The power module according to claim 1, characterized in that, The first upper bridge power unit, the first lower bridge power unit, the second upper bridge power unit, and the second lower bridge power unit each include one or more power devices connected in parallel. Each power device in the first upper bridge power unit, the first lower bridge power unit, the second upper bridge power unit, and the second lower bridge power unit includes a first terminal, a second terminal, and a third terminal.

21. The power module according to claim 7, characterized in that, The first signal terminal includes a first gate terminal, the second signal terminal includes a second gate terminal, the third signal terminal includes a third gate terminal, and the fourth signal terminal includes a fourth gate terminal; The first gate terminal is electrically connected to the first end of the power device in the first upper bridge power unit, the second gate terminal is electrically connected to the first end of the power device in the first lower bridge power unit, the third gate terminal is electrically connected to the first end of the power device in the second upper bridge power unit, and the fourth gate terminal is electrically connected to the first end of the power device in the second lower bridge power unit.

22. The power module according to claim 1, characterized in that, The power module further includes: a first interconnection structure and a second interconnection structure, one end of the first interconnection structure is electrically connected to the second end of the first upper bridge power unit, and the other end of the first interconnection structure serves as a first AC terminal; one end of the second interconnection structure is electrically connected to the second end of the first lower bridge power unit, and the other end of the second interconnection structure serves as a first DC negative terminal. When the first half-bridge of the power module is commutated, the commutation current flows through the DC positive terminal, the first wiring area, the third terminal of the first upper bridge power unit, the second terminal of the first upper bridge power unit, the first interconnection structure, the second wiring area, the third terminal of the first lower bridge power device, the second terminal of the first lower bridge power unit, the second interconnection structure, and the DC negative terminal.

23. The power module according to claim 1, characterized in that, The power module further includes: a third interconnection structure and a fourth interconnection structure, one end of the third interconnection structure is electrically connected to the second end of the second upper bridge power unit, and the other end of the third interconnection structure serves as a second AC terminal; one end of the fourth interconnection structure is electrically connected to the second end of the second lower bridge power unit, and the other end of the fourth interconnection structure serves as a second DC negative terminal. When the second half-bridge of the power module is commutated, the commutation current flows through the DC positive terminal, the third wiring area, the third terminal of the second upper bridge power unit, the second terminal of the second upper bridge power unit, the third interconnection structure, the fourth wiring area, the third terminal of the second lower bridge power device, the second terminal of the second lower bridge power unit, the fourth interconnection structure, and the DC negative terminal.

24. The power module according to claim 1, characterized in that, The power module further includes a molding compound that encapsulates the substrate, wiring layer, and power device unit, the molding compound having opposing upper and lower surfaces.

25. The power module according to claim 24, characterized in that, The DC positive terminal is a conductive block that is exposed on the first surface of the encapsulation.

26. The power module according to claim 25, characterized in that, The power module also includes: A conductive contact structure comprising an opposing upper surface and a lower surface, wherein the lower surface of the conductive contact structure is connected to a second portion of the DC positive terminal.

27. The power module according to claim 26, characterized in that, A groove is provided between the lower surface of the conductive contact structure and the upper surface of the encapsulation.

28. The power module according to claim 26, characterized in that, The power module further includes a heat insulation layer located between the lower surface of the conductive contact structure and the upper surface of the encapsulation.

29. The power module according to claim 27, characterized in that, The power module includes three DC positive terminals, one conductive contact structure, and two grooves.

30. The power module according to claim 27, characterized in that, The power module includes a DC positive terminal, a conductive contact structure, and two grooves.

31. The power module according to claim 1, characterized in that, The substrate is an insulating ceramic substrate with a three-layer structure, including a wiring layer, an insulating layer, and a bottom copper layer.

32. The power module according to claim 1, characterized in that, The substrate consists of only a wiring layer.

33. The power module according to claim 1, characterized in that, The power device in the first half-bridge power unit is one of an insulated-gate field-effect transistor (IGFET) or a parallel structure of an IGFET and a freewheeling diode. The power device in the second half-bridge power unit is a silicon carbide metal-oxide-semiconductor field-effect transistor (MOSFET).

34. The power module according to claim 1, characterized in that, The power devices in the first half-bridge power unit and the second half-bridge power unit are all one of the following: insulated-gate field-effect transistors (IGFETs) and parallel structures of IGFETs and freewheeling diodes.

35. The power module according to claim 1, characterized in that, The power devices in both the first half-bridge power unit and the second half-bridge power unit are silicon carbide metal oxide semiconductor field-effect transistors.

36. A power module, characterized in that, The power module includes: Base plate; A plurality of power modules are located on a first surface of a base plate, wherein the power modules are the power modules described in any one of claims 1 to 35.

37. The power module according to claim 36, characterized in that, A heat dissipation structure is provided on the second side of the base plate.

38. The power module according to claim 36, characterized in that, The power module consists of three components: a first power module, a second power module, and a third power module. The first power module, the second power module, and the third power module form two three-phase full-bridge power units.

39. The power module according to claim 38, characterized in that, The power module includes a power generation unit and an inverter unit. The power generation unit includes a first half-bridge power unit of the first power module, a second half-bridge power unit of the first power module, and a first half-bridge power unit of the second power module. The inverter unit includes a second half-bridge power unit of the second power module, a first half-bridge power unit of the third power module, and a second half-bridge power unit of the third power module.

40. The power module according to claim 38, characterized in that, The power module includes a power generation unit and an inverter unit. The power generation unit includes a first half-bridge power unit of a first power module, a first half-bridge power unit of a second power module, and a first half-bridge power unit of a third power module. The inverter unit includes a second half-bridge power unit of a first power module, a second half-bridge power unit of a second power module, and a second half-bridge power unit of a third power module.

41. The power module according to claim 38, characterized in that, The power module includes a first inverter unit and a second inverter unit. The first inverter unit includes a first half-bridge power unit of the first power module, a second half-bridge power unit of the first power module, and a first half-bridge power unit of the second power module. The second inverter unit includes a second half-bridge power unit of the second power module, a first half-bridge power unit of the third power module, and a second half-bridge power unit of the third power module.

42. The power module according to claim 38, characterized in that, The power module includes a first inverter unit and a second inverter unit. The first inverter unit includes a first half-bridge power unit of a first power module, a first half-bridge power unit of a second power module, and a first half-bridge power unit of a third power module. The second inverter unit includes a second half-bridge power unit of a first power module, a second half-bridge power unit of a second power module, and a second half-bridge power unit of a third power module.

43. The power module according to claim 38, characterized in that, The power module also includes a fourth power module.

44. The power module according to claim 43, characterized in that, The power module also includes a DC-DC module, which includes the fourth power module.

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