Power module

Abstract

The utility model discloses a power module. The power module comprises a substrate; the plurality of power units are located on the first surface of the substrate, and each power unit comprises a power device, a plastic package body for plastic package of the power device, a first power end, a second power end and a signal end; the plurality of power units comprise 6 * n power units which are sequentially arranged at intervals along the length direction of the substrate, n is a positive integer, the power units which are arranged at odd number positions are first power units, and the power units which are arranged at even number positions are second power units; a first power end on the first power unit faces a first side edge of the substrate; the first power end of the second power unit faces the second side edge of the substrate, and the first side edge and the second side edge are oppositely arranged. According to the power module provided by the utility model, the connection difficulty of the peripheral device can be reduced, and the space required by the peripheral device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductors, in particular to a power module. Background Art

[0002] With the development of science and technology, more and more electronic products are coming out. Small electronic products are also widely around people, which places higher and higher requirements on the integration of terminal electronic products.

[0003] Power modules integrate power electronic devices such as metal oxide semiconductor field effect transistors (MOS), silicon carbide (SiC) metal oxide semiconductor field effect transistors, insulated gate bipolar transistors (IGBT), fast recovery diodes (FRD) and other power devices into a package. Due to its high integration and high reliability, it is widely used in electric vehicles, photovoltaic power generation, wind power generation, industrial frequency conversion and other fields. However, in the prior art, power modules often have more complex requirements for the connection of peripheral devices. The peripheral devices need to be stacked or structurally adjusted to reduce the overall size and meet the needs of miniaturization of electronic products.

[0004] Therefore, there is an urgent need for a new power module that can solve the above problems. Utility Model Content

[0005] In view of this, the utility model provides a power module, which realizes the requirements of reducing the difficulty of connecting peripheral devices and reducing the space required for peripheral devices.

[0006] To achieve this purpose, the utility model adopts the following technical solution: a power module is provided, comprising:

[0007] substrate;

[0008] A plurality of power units, wherein the plurality of power units are located on the first surface of the substrate, and the power units include a power device, a plastic package body for plastic-sealing the power device, a first power terminal, a second power terminal, and a signal terminal;

[0009] The plurality of power units include 6*n power units arranged in sequence along the length direction of the substrate, where n is a positive integer, wherein the power units arranged at odd positions are first power units, and the power units arranged at even positions are second power units;

[0010] A first power end on the first power unit faces toward a first side edge of the substrate;

[0011] The first power end of the second power unit faces the second side of the substrate, and the first side is arranged opposite to the second side.

[0012] Optionally, the first power terminal and the signal terminal of the first power unit are located on the same side of the plastic package, and the second power terminal of the first power unit is located on the other opposite side of the plastic package;

[0013] The first power end and the signal end of the second power unit are located on the same side of the plastic package, and the second power end of the second power unit is located on the other side opposite to the plastic package.

[0014] Optionally, the power device includes a SIC MOS, the first power terminal is a source, the second power terminal is a drain, and the signal terminal includes a Kelvin pin and a gate, wherein the Kelvin pin is close to the source.

[0015] Optionally, the power device includes an IGBT, the first power end is an emitter, the second power end is a collector, and the signal end includes a Kelvin pin and a gate, wherein the Kelvin pin is close to the emitter.

[0016] Optionally, outer edges of the first power ends and the second power ends of all the power units are aligned along the width direction of the substrate.

[0017] Optionally, the plastic packages of all the power units are aligned along the width direction of the substrate.

[0018] Optionally, there are six power units.

[0019] Optionally, n is greater than or equal to 2, and starting from the first power unit, every six power units form a group.

[0020] Optionally, every six power units are divided into a first group of power units, a second group of power units and a third group of power units; the first group of power units, the second group of power units and the third group of power units respectively include a first power unit and a second power unit that are adjacent to each other; one power unit is only in the first group of power units or the second group of power units or the third group of power units;

[0021] The distance between the signal end of the first power unit and the signal end of the second power unit in the first group of power units is greater than the distance between the first power end of the first power unit and the first power end of the second power unit;

[0022] The distance between the signal end of the first power unit and the signal end of the second power unit in the second group of power units is greater than the distance between the first power end of the first power unit and the first power end of the second power unit;

[0023] The distance between the signal end of the first power unit and the signal end of the second power unit in the third group of power units is greater than the distance between the first power end of the first power unit and the first power end of the second power unit.

[0024] Optionally, the first power end of each group of the first power units is connected to the negative electrode of the capacitor; and the second power end of each group of the second power units is connected to the positive electrode of the capacitor.

[0025] Optionally, the second power terminal of the first power unit of the first group of power units and the first power terminal of the second power unit of the first group of power units are connected to the first phase of the motor;

[0026] The second power terminal of the first power cell of the second group of power cells and the first power terminal of the second power cell of the second group of power cells are connected to the second phase of the motor;

[0027] The second power terminal of the first power cell of the third group of power cells and the first power terminal of the second power cell of the third group of power cells are connected to the third phase of the motor.

[0028] Optionally, the power module further includes heat dissipation fins, and the heat dissipation fins are located on the second surface of the substrate;

[0029] The shape of the heat dissipation fins includes one or more combinations selected from the group consisting of cylinders, elliptical cylinders, prisms, and wavy shapes.

[0030] Optionally, an insulating layer is further provided between the substrate and the plurality of power units.

[0031] Optionally, the insulating layer also covers at least a portion of a side surface of the substrate.

[0032] Optionally, the insulating layer is detachably connected to the substrate.

[0033] Optionally, the insulating layer includes a first insulating layer and a second insulating layer;

[0034] The first insulating layer is located on a first side of the substrate; the second insulating layer is located on a second side of the substrate.

[0035] Optionally, the power unit and the substrate are connected by welding.

[0036] Optionally, the substrate further comprises:

[0037] A first locking portion, wherein the first locking portion is respectively located at four corners of the substrate;

[0038] The second locking portion is located in the middle of the first side edge and the second side edge of the substrate, and the number of the second locking portion is two, three or four.

[0039] Optionally, the first side edge and the second side edge of the substrate are designed to be recessed at positions where the first locking portion and the second locking portion are not provided.

[0040] Optionally, the length of the power module is between 150 mm and 165 mm.

[0041] Optionally, a width of the power module is between 65 mm and 75 mm.

[0042] Optionally, a width of the power module is between 68 mm and 71 mm.

[0043] Optionally, a width of the power module is between 55 mm and 65 mm.

[0044] The beneficial technical effect of the present invention is that in the power module of the present invention, the first power ends of adjacent power units are arranged in a staggered manner, thereby facilitating connection with peripheral devices, reducing the difficulty of connecting the peripheral devices, and reducing the space requirements of the peripheral devices.

[0045] Furthermore, the power terminal on the first side of the power module is connected to the capacitor, and the power terminal on the second side of the power module is connected to the motor (UVW phase), eliminating the need for a peripheral connection design of a laminated busbar, thereby facilitating peripheral connection.

[0046] Furthermore, the Kelvin pins of the first power unit and the second power unit in each group of power units are respectively arranged at the two corners with the farthest distance, which greatly ensures that the power circuit is not disturbed.

[0047] Furthermore, the plastic packages of the multiple power units are aligned in the width direction of the substrate, so that the space required in the width direction is smaller, and thus the required volume is smaller, which can improve the power density of the power module and save costs.

[0048] Furthermore, the insulating layer is made of flexible material and is detachably connected to the substrate. The insulating layer can be installed after the power unit is connected to the substrate, which facilitates installation and reduces the process difficulty of the power module.

[0049] Furthermore, the second surface of the substrate is also provided with heat dissipation fins, which further increases the heat dissipation area and improves the heat dissipation capacity of the power module.

[0050] Furthermore, the insulating layer covers the first surface and at least a portion of the side surfaces of the substrate, thereby obtaining a better insulation effect and improving the reliability of the power module.

[0051] Furthermore, the first side edge and the second side edge of the substrate are recessed at positions where the first locking portion and the second locking portion are not provided, which can reduce the weight of the power module and achieve a lightweight design.

[0052] This power module has the ability to reduce the difficulty of connecting peripheral devices and reduce the space requirements of peripheral devices, and can meet the needs of various application scenarios such as electric or hybrid vehicles, photovoltaic power generation, wind power generation, industrial frequency conversion, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The above and other purposes, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0054] Figure 1 It is a three-dimensional schematic diagram of a power module of the first embodiment of the utility model;

[0055] Figure 2 is a schematic diagram of a power unit of a power module of the first embodiment of the utility model;

[0056] Figure 3 This is a front view of a power module according to the first embodiment of the present utility model;

[0057] Figure 4 is a bottom view of the power module of the first embodiment of the utility model;

[0058] Figure 5 It is a left side view of the power module of the first embodiment of the utility model;

[0059] Figure 6 It is a rear view of the power module of the first embodiment of the utility model;

[0060] Figure 7 This is a schematic diagram of an application circuit of a power module according to the first embodiment of the utility model;

[0061] Figure 8 This is a front view of a power module according to a second embodiment of the present utility model;

[0062] Fig. 9 is a bottom view of a power module according to a second embodiment of the present utility model;

[0063] Fig.10 It is a left side view of the power module of the second embodiment of the utility model;

[0064] Fig.11 is a three-dimensional diagram of a power module according to a second embodiment of the present utility model;

[0065] Fig.12 It is a rear view of a power module according to the second embodiment of the utility model. DETAILED DESCRIPTION

[0066] Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements are represented by the same or similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale. In addition, some well-known parts may not be shown in the drawings.

[0067] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the detailed description of the present invention below, some specific details are described in detail. For those skilled in the art, the present invention can be fully understood without the description of these details. In order to avoid confusing the essence of the present invention, well-known methods, processes, procedures, and components are not described in detail.

[0068] In the description of the present utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms such as "upper", "lower", "left", "right", "inner", "outer", "lateral", and "longitudinal" is based on the orientation or positional relationship shown in the corresponding drawings, which is for the convenience of describing the form, position and connection relationship of each component in the present utility model, rather than indicating or implying that the component must be located in a specific orientation and morphological structure in the whole, and should not be understood as a limitation on the present utility model. When describing the structure of a component, when a layer or a region is referred to as being "above" or "above" another layer or another region, it may mean being directly above another layer or another region, or containing other layers or regions between it and another layer or another region. Furthermore, if the component is turned over, the layer or the region will be located "below" or "below" another layer or another region.

[0069] Figure 1 It is a three-dimensional schematic diagram of a power module of the first embodiment of the utility model; Figure 2 is a schematic diagram of a power unit of a power module of the first embodiment of the utility model; Figure 3 This is a front view of a power module according to the first embodiment of the present utility model; Figure 4 is a bottom view of the power module of the first embodiment of the utility model; Figure 5 It is a left side view of the power module of the first embodiment of the utility model; Figure 6 It is a rear view of the power module of the first embodiment of the utility model.

[0070] Combination Figures 1 to 6 As shown, the power module according to the first embodiment of the present invention includes a substrate 100 and a plurality of power units 200. Optionally, the substrate 100 is made of metal materials such as copper or aluminum to improve the heat dissipation performance of the substrate 100.

[0071] Specifically, a plurality of power units 200 are located on the first surface of the substrate 100 and are connected to the substrate 100 by welding, for example. The power unit 200 includes a power device, a plastic package 210 for plastic-sealing the power device, a first power terminal 220, a second power terminal 230 and a signal terminal 240.

[0072] The multiple power units 200 include 6*n power units arranged in sequence along the length direction of the substrate 100, where n is a positive integer, wherein the power units arranged at odd positions are first power units 2001, and the power units arranged at even positions are second power units 2002. The first power end 220 on the first power unit 2001 faces the first side 121 of the substrate 100. The first power end 220 on the second power unit 200 faces the second side 122 of the substrate 100, and the first side 121 and the second side 122 are arranged opposite to each other.

[0073] Optionally, the first power terminal 220 and the signal terminal 240 of the first power unit 2001 are located on the same side of the plastic package 210, and the second power terminal 230 of the first power unit 2001 is located on the other side opposite to the plastic package 210; the first power terminal 220 and the signal terminal 240 of the second power unit 2002 are located on the same side of the plastic package 210, and the second power terminal 240 of the second power unit 2002 is located on the other side opposite to the plastic package 210.

[0074] The power device includes, for example, a SIC MOS (silicon carbide metal-oxide semiconductor field effect transistor) or an IGBT (insulated gate bipolar transistor). When the power device is a SIC MOS, the first power terminal 220 is a source, the second power terminal 230 is a drain, and the signal terminal 240 includes a Kelvin pin 241 and a gate 242. The Kelvin pin 241 is close to the source. When the power device is an IGBT, the first power terminal 220 is an emitter, the second power terminal 230 is a collector, and the signal terminal 240 includes a Kelvin pin 241 and a gate 242. The Kelvin pin 241 is close to the emitter.

[0075] An insulating layer 130 is also provided between the substrate 100 and the power unit 200. The insulating layer 130 covers the first surface and at least part of the side surface of the substrate 100. The substrate 100 further includes a first locking portion and a second locking portion. The first locking portions are respectively located at the four corners of the substrate 100, and the second locking portions are located at the middle position of the first side edge and the second side edge. The number of the second locking portions is two, three or four. The first locking portions and the second locking portions are used, for example, for fixed connection between the power module and the peripheral device.

[0076] In terms of the arrangement of the plurality of power units 200, the outer edges of the first power ends 220 and the second power ends 230 of all the power units 200 are aligned along the width direction of the substrate 100 (eg Figure 3 In this embodiment, the width of the power module is between 65 mm and 75 mm, but is not limited thereto. Preferably, the width of the power module is between 68 mm and 71 mm.

[0077] Figure 6 FIG. 1 is a rear view of the power module of the first embodiment of the utility model. Figure 1 , Figure 4 and Figure 6 As shown, the substrate 100 has a first surface and a second surface opposite to each other. A plurality of power units 200 are located on the first surface of the substrate 100. The power module further includes a heat sink 140, which is located on the second surface of the substrate 100. The shape of the heat sink 140 includes at least one selected from a cylinder, an elliptical cylinder, a prism, an irregular cylinder, etc.

[0078] Figure 7 is a schematic diagram of an application circuit of a power module according to the first embodiment of the utility model; Figure 1 , Figure 3 (and for Figure 3 ) and Figure 7 As shown, the number of power units 200 is six. Of course, the number of power units 200 can also be selected according to actual conditions. Figure 7 The six shown are only a specific embodiment. Optionally, n is greater than or equal to 2, for example, the power module includes 12 power units (i.e., n=2), the 12 power units are arranged in sequence along the length direction of the substrate 100, and the 12 power units are divided into two groups, and the two groups drive one motor together. By driving the motor together by multiple groups, the driving capacity of the motor can be improved.

[0079] Every six power units 200 are divided into a first group of power units, a second group of power units and a third group of power units. The first group of power units, the second group of power units and the third group of power units respectively include a first power unit 2001 and a second power unit 2002 that are adjacent to each other; a power unit is only in the first group of power units or the second group of power units or the third group of power units. The spacing between the signal end 240 of the first power unit 2001 and the signal end 240 of the second power unit 2002 in the first group of power units is greater than the spacing between the first power end 220 of the first power unit 2001 and the first power end 220 of the second power unit 2002.

[0080] The distance between the signal terminal 240 of the first power unit 2001 and the signal terminal 240 of the second power unit 2002 in the second group of power units is greater than the distance between the first power terminal 220 of the first power unit 2001 and the first power terminal 220 of the second power unit 2002 .

[0081] The distance between the signal end 240 of the first power unit 2001 and the signal end 240 of the second power unit 2002 in the third group of power units is greater than the distance between the first power end 220 of the first power unit 2001 and the first power end 240 of the second power unit 2002. Figure 1 , Figure 3 and Figure 7 As shown, the first power unit 2001 of the first group of power units (corresponding to Figure 7 VT1 in), the second power unit 2002 (corresponding to Figure 7 VT2 in the second group of power units), the first power unit 2001 (corresponding to Figure 7 VT3 in), the second power unit 2002 (corresponding to Figure 7 VT4 in the third group of power units), the first power unit 2001 (corresponding to Figure 7 VT5 in) and the second power unit 2002 (corresponding to Figure 7 VT6 in the figure). The first group of power units includes VT1 and VT2; the second group of power units includes VT3 and VT4; and the third group of power units includes VT5 and VT6.

[0082] The first power terminal 220 of each group of first power cells 2001 is connected to the negative electrode of the capacitor, and the second power terminal 230 of each group of second power cells 2002 is connected to the positive electrode of the capacitor. The second power terminal 230 of the first power cell 2001 of the first group of power cells and the first power terminal 220 of the second power cell 2002 of the first group of power cells are connected to the first phase of the motor; the second power terminal 230 of the first power cell 2001 of the second group of power cells and the first power terminal 220 of the second power cell 2002 of the second group of power cells are connected to the second phase of the motor; the second power terminal 230 of the first power cell 2001 of the third group of power cells and the first power terminal 220 of the second power cell 2002 of the third group of power cells are connected to the third phase of the motor.

[0083] Figure 8 It is a front view of a power module according to the second embodiment of the utility model. Fig. 9 It is a bottom view of a power module according to the second embodiment of the utility model. Fig.10 It is a left side view of the power module of the second embodiment of the utility model. Fig.11 It is a three-dimensional diagram of a power module according to the second embodiment of the utility model. Fig.12 It is a rear view of a power module according to the second embodiment of the utility model.

[0084] Combination Figures 8 to 12As shown, in the power module according to the second embodiment of the utility model, the general structure of the power module is the same as that of the first embodiment, except that, in the present embodiment, the plastic package 210 of the multiple power units 200 is aligned in the width direction of the substrate 100, which can reduce the space required in the width direction, thereby reducing the volume, improving the power density, and saving costs. In the present embodiment, the length of the power module is between 150mm and 165mm; the width of the power module is between 55mm and 65mm, but is not limited to this. Optionally, the first side edge and the second side edge of the substrate 100 are recessed at the position where the first locking portion and the second locking portion are not provided, that is, part of the non-installation portion is removed to reduce the weight of the substrate 100. In the present embodiment, a removable insulating layer 130 is provided between the substrate 100 and the multiple power units 200. The insulating layer 130 is, for example, flexible, and the insulating layer 130 can be easily installed after the power unit 200 and the substrate 100 are installed. Optionally, as Fig.11 As shown, a detachable first insulating layer 131 and a second insulating layer 132 are provided between the substrate 100 and the plurality of power units 200. Figure 5 The first insulating layer 131 is located at the first side 121 of the substrate 100; the second insulating layer 132 is located at the second side 122 of the substrate 100. The first insulating layer 131 and the second insulating layer 132 are separated and not connected.

[0085] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0086] At the same time, it should be understood that example embodiments are provided so that the present disclosure is comprehensive and its scope is fully conveyed to those skilled in the art. Many specific details (such as examples of specific components, devices and methods) are given to provide a comprehensive understanding of the present disclosure. It will be understood by those skilled in the art that specific details need not be adopted, that example embodiments can be implemented in many different forms, and that example embodiments should not be construed as limiting the scope of the present disclosure. In some example embodiments, well-known device structures and well-known technologies are not described in detail.

[0087] When an element or layer is referred to as being "on," "engaged to," "connected to," or "coupled to" another element or layer, it may be directly on, directly engaged to, connected to, or coupled to another element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly" "on," "directly engaged to," "directly connected to," or "directly coupled to" another element or layer, there may be no intervening elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any or all combinations of one or more of the associated listed items.

[0088] Although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another element, region, layer or section. Terms such as "first", "second" and other numerical terms do not mean order or sequence when used here, unless the context clearly indicates. Thus, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section, without departing from the teaching of the exemplary embodiment. In addition, in the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more.

[0089] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A power module, characterized in that: include: substrate; A plurality of power units, wherein the plurality of power units are located on the first surface of the substrate, and the power units include a power device, a plastic package body for plastic-sealing the power device, a first power terminal, a second power terminal, and a signal terminal; The plurality of power units include 6*n power units arranged in sequence along the length direction of the substrate, where n is a positive integer, wherein the power units arranged at odd positions are first power units, and the power units arranged at even positions are second power units; A first power end on the first power unit faces toward a first side edge of the substrate; The first power end of the second power unit faces the second side of the substrate, and the first side is arranged opposite to the second side.

2. The power module according to claim 1, characterized in that: The first power end and the signal end of the first power unit are located on the same side of the plastic package, and the second power end of the first power unit is located on the other side opposite to the plastic package; The first power end and the signal end of the second power unit are located on the same side of the plastic package, and the second power end of the second power unit is located on the other side opposite to the plastic package.

3. The power module according to claim 1, characterized in that: The power device comprises a SIC MOS, the first power terminal is a source, the second power terminal is a drain, and the signal terminal comprises a Kelvin pin and a gate, wherein the Kelvin pin is close to the source.

4. The power module according to claim 1, characterized in that: The power device includes an IGBT, the first power end is an emitter, the second power end is a collector, and the signal end includes a Kelvin pin and a gate, wherein the Kelvin pin is close to the emitter.

5. The power module according to claim 1, characterized in that: Outer edges of the first power ends and the second power ends of all power units are aligned along the width direction of the substrate.

6. The power module according to claim 1, characterized in that: The plastic packages of all power units are aligned along the width direction of the substrate.

7. The power module according to claim 2, characterized in that: There are six power units.

8. The power module according to claim 2, characterized in that: n is greater than or equal to 2, and starting from the first power unit, every six power units form a group.

9. The power module according to claim 7 or 8, characterized in that: Every six power units are divided into a first group of power units, a second group of power units and a third group of power units; the first group of power units, the second group of power units and the third group of power units respectively include a first power unit and a second power unit that are adjacent to each other; one power unit is only in the first group of power units or the second group of power units or the third group of power units; The distance between the signal end of the first power unit and the signal end of the second power unit in the first group of power units is greater than the distance between the first power end of the first power unit and the first power end of the second power unit; The distance between the signal end of the first power unit and the signal end of the second power unit in the second group of power units is greater than the distance between the first power end of the first power unit and the first power end of the second power unit; The distance between the signal end of the first power unit and the signal end of the second power unit in the third group of power units is greater than the distance between the first power end of the first power unit and the first power end of the second power unit.

10. The power module according to claim 9, characterized in that: The first power end of each group of the first power units is connected to the negative electrode of the capacitor; the second power end of each group of the second power units is connected to the positive electrode of the capacitor.

11. The power module according to claim 9, characterized in that: The second power terminal of the first power cell of the first group of power cells and the first power terminal of the second power cell of the first group of power cells are connected to the first phase of the motor; The second power terminal of the first power cell of the second group of power cells and the first power terminal of the second power cell of the second group of power cells are connected to the second phase of the motor; The second power terminal of the first power cell of the third group of power cells and the first power terminal of the second power cell of the third group of power cells are connected to the third phase of the motor.

12. The power module according to claim 1, characterized in that: The power module further includes a heat sink fin, and the heat sink fin is located on the second surface of the substrate; The shape of the heat dissipation fins includes one or more combinations selected from the group consisting of cylinders, elliptical cylinders, prisms, and wavy shapes.

13. The power module according to claim 1, characterized in that: An insulating layer is also provided between the substrate and the plurality of power units.

14. The power module according to claim 13, characterized in that: The insulating layer also covers at least a portion of a side surface of the substrate.

15. The power module according to claim 13, characterized in that: The insulating layer is detachably connected to the substrate.

16. The power module according to claim 15, characterized in that: The insulating layer comprises a first insulating layer and a second insulating layer; The first insulating layer is located on a first side of the substrate; the second insulating layer is located on a second side of the substrate.

17. The power module according to claim 1, characterized in that: The power unit and the base plate are connected by welding.

18. The power module according to claim 1, characterized in that: The substrate further comprises: A first locking portion, wherein the first locking portion is respectively located at four corners of the substrate; The second locking portion is located in the middle of the first side edge and the second side edge of the substrate, and the number of the second locking portion is two, three or four.

19. The power module according to claim 18, characterized in that: The first side edge and the second side edge of the substrate are recessed at positions where the first locking portion and the second locking portion are not provided.

20. The power module according to claim 1, characterized in that: The length of the power module is between 150 mm and 165 mm.

21. The power module according to claim 1, characterized in that: The width of the power module is between 65 mm and 75 mm.

22. The power module according to claim 21, characterized in that: The width of the power module is between 68 mm and 71 mm.

23. The power module according to claim 1, characterized in that: The width of the power module is between 55 mm and 65 mm.

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