A power module assembly of a boost module

Abstract

The application provides a power module assembly of a boost module, a first capacitor is connected with a positive copper bar of a power input and a negative copper bar of the power input, and a second capacitor is connected with a positive copper bar of an output end and a negative copper bar of the output end; the power module assembly further comprises an inductor and an IGBT module, an input end of the inductor is connected with the first capacitor, and an output end of the inductor is connected with the IGBT module; the adapter copper bar further comprises a connecting copper bar, one end of the connecting copper bar is connected with the output end of the inductor, and the other end of the connecting copper bar is connected with an input end of the IGBT module; the IGBT module comprises a first IGBT unit and a second IGBT unit, an output end of the first IGBT unit is connected with the negative copper bar of the output end, and an output end of the second IGBT unit is connected with the positive copper bar of the output end; and the current of the power end is sequentially output after passing through the first capacitor, the inductor, the IGBT module and the second capacitor.

Description

Technical Field

[0001] This invention relates to the field of power module technology, and more particularly to a power module component for a boost module. Background Technology

[0002] Currently, most hybrid vehicles on the market have small battery capacities, which cannot provide sufficiently high voltage. Therefore, a boost module is added to the vehicle system to increase the voltage. However, this boost module requires additional capacitors and copper busbars, resulting in a large footprint, high cost, and complex manufacturing process. Summary of the Invention

[0003] In order to overcome the above-mentioned technical defects, the purpose of this invention is to provide a power module component of a boost module with high spatial integration.

[0004] This invention discloses a power module component for a boost module, including a capacitor module and an adapter copper busbar. The adapter copper busbar includes a positive power input copper busbar, a negative power input copper busbar, a positive output copper busbar, and a negative output copper busbar. The capacitor module includes a first capacitor and a second capacitor. The first capacitor is connected to the positive and negative power input copper busbars, and the second capacitor is connected to the positive and negative output copper busbars. The negative power input copper busbar is connected to the negative output copper busbar. The module also includes an inductor and an IGBT module, with the input terminal of the inductor connected to the first capacitor. The output terminal of the inductor is connected to the IGBT module; the adapter copper busbar also includes a connecting copper busbar, one end of which is connected to the output terminal of the inductor, and the other end of which is connected to the input terminal of the IGBT module; the IGBT module includes a first IGBT unit and a second IGBT unit, the output terminal of the first IGBT unit is connected to the negative output copper busbar, and the output terminal of the second IGBT unit is connected to the positive output copper busbar; the current from the power supply is output after passing through the first capacitor, the inductor, the first IGBT unit and the second IGBT unit, and the second capacitor in sequence.

[0005] Preferably, the first capacitor includes a first capacitor No. 1 and a second capacitor No. 2; the first capacitor No. 1 and the second capacitor No. 2 are arranged vertically to form a first accommodating space between the first capacitor No. 1 and the second capacitor No. 2, and the inductor and the IGBT module are placed in the first accommodating space; it also includes a housing, the adapter copper busbar and the capacitor assembly are disposed in the housing, and the first accommodating space is disposed outside the housing.

[0006] Preferably, the power input positive copper busbar includes a first section, a second section, and a third section connected vertically in sequence. The first section of the power input positive copper busbar extends along the length direction of the first capacitor, the second section of the power input positive copper busbar extends along the width direction of the first capacitor, and the third section of the power input positive copper busbar extends along the length direction of the first capacitor.

[0007] The power input negative copper busbar includes a first section, a second section, and a third section connected vertically in sequence. The first section of the power input negative copper busbar extends along the length direction of the first capacitor, the second section of the power input negative copper busbar extends along the width direction of the first capacitor, and the third section of the power input negative copper busbar extends along the length direction of the first capacitor.

[0008] The positive power input copper busbar is located above the negative power input copper busbar, thereby forming a second accommodating space between the second section of the positive power input copper busbar, the second section of the negative power input copper busbar, the third section of the positive power input copper busbar, and the third section of the negative power input copper busbar, and the first capacitor is placed in the second accommodating space.

[0009] Preferably, the positive power input copper busbar further includes a fourth segment, which is perpendicularly connected to the third segment and extends along the length of the second first capacitor; the negative power input copper busbar further includes a fourth segment, which is perpendicularly connected to the third segment and extends along the length of the second first capacitor; thereby forming a third accommodating space between the fourth segment of the positive power input copper busbar and the fourth segment of the negative power input copper busbar, and the second first capacitor is placed within the third accommodating space.

[0010] Preferably, the connecting copper busbar includes a first section, a second section, and a third section connected vertically in sequence; the first section of the connecting copper busbar extends along the length direction of the first capacitor, the second section of the connecting copper busbar extends along the length direction of the second capacitor and the second capacitor, and the third section of the connecting copper busbar extends along the height direction of the second capacitor; thereby forming the third accommodating space between the fourth section of the positive power input copper busbar, the fourth section of the negative power input copper busbar, and the second section of the connecting copper busbar; and forming a fourth accommodating space between the second section of the connecting copper busbar, the third section of the connecting copper busbar, and the fourth section of the negative power input copper busbar, with the second capacitor placed within the fourth accommodating space.

[0011] Preferably, the negative copper busbar at the output end extends along the height direction of the second capacitor and is parallel to the third section of the connecting copper busbar, thereby forming the fourth accommodating space with the third section of the connecting copper busbar.

[0012] Preferably, the positive output copper busbar includes a first section and a second section connected vertically in sequence. The first section of the positive output copper busbar extends along the length direction of the second capacitor and is located above the negative power input copper busbar, while the second section of the positive output copper busbar extends along the height direction of the second capacitor. Thus, the fourth accommodating space is formed between the first section of the positive output copper busbar, the second section of the positive output copper busbar, the second section of the connecting copper busbar, the third section of the connecting copper busbar, and the fourth section of the negative power input copper busbar.

[0013] Preferably, the negative copper busbar at the output terminal includes a first section and a second section connected vertically in sequence; the first section of the negative copper busbar at the output terminal extends along the height direction of the second capacitor and is parallel to the third section of the connecting copper busbar; the second section of the negative copper busbar at the output terminal extends along the length direction of the first capacitor; the positive copper busbar at the output terminal further includes a third section, which extends along the length direction of the first capacitor.

[0014] Preferably, the housing includes a first housing and a second housing, the first capacitor is disposed in the first housing, and the second capacitor and the second capacitor are disposed in the second housing; a connecting lug is provided between the first housing and the second housing.

[0015] Preferably, a water-cooled plate is provided at the bottom of the housing, and a heat sink is provided between the housing and the water-cooled plate; the inductor is provided on one side of the water-cooled plate, and the IGBT module is provided on the other side of the water-cooled plate.

[0016] Compared with existing technologies, the above technical solution has the following advantages:

[0017] 1. This invention integrates capacitor modules, inductor modules, and IGBT modules into a single module system via a connecting copper busbar, thereby reducing costs, achieving high integration, simplifying and speeding up installation, and improving manufacturing processability and manufacturability. Furthermore, by setting the shape of the connecting copper busbar and the positions of the capacitor, inductor, and IGBT modules, the space occupied by the connecting copper busbar and capacitor modules is reduced, thus improving space utilization. Attached Figure Description

[0018] Figure 1 An exploded view of the power module component of the boost module provided by the present invention;

[0019] Figure 2 A three-dimensional view of the overall structure of the power module component of the boost module provided by the present invention;

[0020] Figure 3 A top view of the power module component of the boost module provided by the present invention;

[0021] Figure 4 A schematic diagram of the power module component of the boost module provided by the present invention, which includes an inductor;

[0022] Figure 5 A schematic diagram of the power module assembly of the boost module provided by the present invention, which includes an IGBT module;

[0023] Figure 6 A circuit diagram of the power module component of the boost module provided by the present invention.

[0024] in:

[0025] 1-Power input positive copper busbar, 101-First section of power input positive copper busbar, 102-Second section of power input positive copper busbar, 103-Third section of power input positive copper busbar, 104-Fourth section of power input positive copper busbar;

[0026] 2-Power input negative copper busbar, 201-First section of power input negative copper busbar, 202-Second section of power input negative copper busbar, 203-Third section of power input negative copper busbar, 204-Fourth section of power input negative copper busbar;

[0027] 3- Output positive copper busbar, 301- First section of output positive copper busbar, 302- Second section of output positive copper busbar, 303- Third section of output positive copper busbar;

[0028] 4- Output negative copper busbar, 401- First section of output negative copper busbar, 402- Second section of output negative copper busbar;

[0029] 5-First housing;

[0030] 6-Second shell;

[0031] 7-Heat sink;

[0032] 8-First capacitor;

[0033] 9- Capacitor No. 2, Number 1;

[0034] 10 - Capacitor No. 2;

[0035] 11-Inductor;

[0036] 12-IGBT module;

[0037] 13-Connecting ear;

[0038] 14-Connecting copper busbar, 1401-Connecting the first section of the copper busbar, 1402-Connecting the second section of the copper busbar, 1403-Connecting the third section of the copper busbar;

[0039] 15-Water-cooled plate. Detailed Implementation

[0040] The advantages of the present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments.

[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0042] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0043] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0044] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0046] In the following description, suffixes such as "module," "part," or "unit" used to denote elements are used only for the convenience of the description of the invention and have no specific meaning in themselves. Therefore, "module" and "part" can be used interchangeably.

[0047] See appendix Figure 1-5 This invention discloses a power module assembly for a boost module, including a capacitor module and an adapter copper busbar. The adapter copper busbar electrically connects the capacitor module to other components within the power module assembly, forming a highly integrated module assembly.

[0048] Specifically, the adapter copper busbar includes a power input positive copper busbar 1 and a power input negative copper busbar 2, which are connected to the battery (power supply). It also includes an output positive copper busbar 3 and an output negative copper busbar 4, through which the current after passing through the capacitor module, inductor 11, and IGBT module 12 is discharged.

[0049] The capacitor module in this invention includes a first capacitor and a second capacitor 10. Both the first capacitor and the second capacitor 10 are film capacitors. The function of the first capacitor is to smooth the current ripple on the battery side, and the function of the second capacitor 10 is to reduce the voltage ripple of the high-voltage bus and reduce the noise in the converter circuit. The first capacitor is connected to the positive copper busbar 1 and the negative copper busbar 2 of the power input, and the second capacitor 10 is connected to the positive copper busbar 3 and the negative copper busbar 4 of the output.

[0050] In a preferred embodiment of the present invention, the negative copper busbar 2 of the power input terminal is connected to the negative copper busbar 4 of the output terminal, which can be understood as the same copper busbar as the negative copper busbar 2 of the power input terminal and the negative copper busbar 4 of the output terminal.

[0051] The power module components of the boost module also include an inductor 11 and an IGBT module 12. The input terminal of the inductor 11 is connected to the first capacitor, and the output terminal of the inductor 11 is connected to the IGBT module 12.

[0052] The adapter copper busbar includes the positive power input copper busbar 1, the negative power input copper busbar 2, the negative power input copper busbar 2 and the negative output copper busbar 4, and also includes a connecting copper busbar 14. One end of the connecting copper busbar 14 is connected to the output terminal of the inductor 11, and the other end is connected to the input terminal of the IGBT module 12.

[0053] In a preferred embodiment of the present invention, the IGBT module 12 includes a first IGBT unit and a second IGBT unit. The output terminal of the first IGBT unit is connected to the negative output copper busbar 4, and the output terminal of the second IGBT unit is connected to the positive output copper busbar 3.

[0054] See appendix Figure 6 The current from the power supply passes through the first capacitor, inductor 11, the first IGBT unit and the second IGBT unit, and the second capacitor 10 in sequence before being output.

[0055] Preferably, in the boost module of the present invention, since the capacitance of the first capacitor used to smooth the current ripple on the battery side needs to be greater than the capacitance of the second capacitor 10 used to reduce the voltage ripple on the high-voltage bus and reduce the noise in the converter circuit, in the preferred embodiment of the present invention, the first capacitor includes a first capacitor 8 and a second capacitor 9. Furthermore, in order to achieve a higher overall integration of the boost module, the first capacitor 8 and the second capacitor 9 are arranged vertically, thereby forming a first accommodating space between the first capacitor 8 and the second capacitor 9, within which the inductor 11 and the IGBT module 12 are placed.

[0056] Specifically, the boost module includes a housing, with the adapter copper busbar, capacitor assembly, etc. located inside the housing, and the first accommodating space located outside the housing, that is, the inductor 11 and IGBT module 12 are located outside the housing.

[0057] Preferably, the positive power input copper busbar 1 includes a first section 101, a second section 102, and a third section 103 connected vertically in sequence. The first section 101 of the positive power input copper busbar 1 extends along the length of the first capacitor 8, the second section 102 extends along the width of the first capacitor 8, and the third section 103 extends along the length of the first capacitor 8, thus forming a bending space between the second section 102 and the third section 103 of the positive power input copper busbar 1 to accommodate the first capacitor 8.

[0058] The first section 101 of the positive power input copper busbar 1 can be understood as a current-carrying copper busbar. Its shape can be extended along the length direction of the first capacitor 8 or along the width direction of the first capacitor 8. Here, it is set to extend along the length direction of the first capacitor 8 to facilitate the connection with the inductor 11, IGBT module 12, etc., and improve the integration.

[0059] The power input negative copper busbar 2 includes a first section 201, a second section 202, and a third section 203 connected vertically in sequence. The first section 201 of the power input negative copper busbar 2 extends along the length direction of the first capacitor 8, the second section 202 of the power input negative copper busbar 2 extends along the width direction of the first capacitor 8, and the third section 203 of the power input negative copper busbar 2 extends along the length direction of the first capacitor 8, thereby forming a bending space between the second section 202 and the third section 203 of the power input negative copper busbar 2 to accommodate the first capacitor 8.

[0060] The first section 201 of the negative copper busbar 2 can also be understood as a current-carrying copper busbar. Its shape can be extended along the length direction of the first capacitor 8 or along the width direction of the first capacitor 8. Here it is set to extend along the length direction of the first capacitor 8, which also facilitates the connection with the inductor 11, IGBT module 12, etc., and improves the integration.

[0061] Specifically, the first capacitor 8 is arranged such that the positive power input copper busbar 1 is located above the negative power input copper busbar 2, thereby forming a second accommodating space between the second section 102 of the positive power input copper busbar 1, the second section 202 of the negative power input copper busbar 2, the third section 103 of the positive power input copper busbar 1, and the third section 203 of the negative power input copper busbar 2. Therefore, the first capacitor 8 is placed in the second accommodating space.

[0062] Preferably, the positive power input copper busbar 1 further includes a fourth segment 104, which is perpendicularly connected to the third segment 103 of the positive power input copper busbar 1 (meaning there is a vertical transition between the fourth segment 104 and the third segment 103), and the fourth segment 104 extends along the length direction of the second first capacitor 9. The negative power input copper busbar 2 also includes a fourth segment 204, which is perpendicularly connected to the third segment 203 of the negative power input copper busbar 2 (meaning there is a vertical transition between the fourth segment 204 and the third segment 203), and the fourth segment 104 of the positive power input copper busbar 1 also extends along the length direction of the second first capacitor 9. Thus, a third accommodating space is formed between the fourth section 104 of the positive power input copper busbar 1 and the fourth section 204 of the negative power input copper busbar 2, and the second first capacitor 9 is placed in the third accommodating space.

[0063] Preferably, the connecting copper busbar 14 includes a first section 1401, a second section 1402, and a third section 1403 connected vertically in sequence. The first section 1401 of the connecting copper busbar 14 extends along the length direction of the first capacitor 8, the second section 1402 of the connecting copper busbar 14 extends along the length direction of the second capacitor 9 and the second capacitor 10 (which can be understood as: the first section 1401 and the second section 1402 of the connecting copper busbar 14 are vertically connected), and the third section 1403 of the connecting copper busbar 14 extends along the height direction of the second capacitor 10. Thus, the fourth section 104 of the positive power input copper busbar 1, the fourth section 204 of the negative power input copper busbar 2, and the second section 1402 of the connecting copper busbar 14 form the aforementioned third accommodating space for accommodating the second capacitor 9. The fourth section 104 of the positive power input copper busbar 1 and the fourth section 204 of the negative power input copper busbar 2 are used to form the "top surface" and "bottom surface" of the third accommodating space, and the second section 1402 of the connecting copper busbar 14 is used to form the "side surface" of the third accommodating space.

[0064] A fourth accommodating space is formed between the second section 1402 connecting the copper busbar 14, the third section 1403 connecting the copper busbar 14, and the fourth section 204 of the power input negative copper busbar 2, and the second capacitor 10 is placed in the fourth accommodating space. The fourth section 204 of the power input negative copper busbar 2 forms the "bottom surface" of the third accommodating space, while the second section 1402 and the third section 1403 connecting the copper busbar 14 form the "side surface" of the third accommodating space.

[0065] Preferably, the output negative copper busbar 4 extends along the height direction of the second capacitor 10 and is parallel to the third section 1403 of the connecting copper busbar 14, thereby forming a fourth accommodating space with the output negative copper busbar 4 and the third section 1403 of the connecting copper busbar 14. Specifically, in addition to the fourth section 204 of the power input negative copper busbar 2 forming the "bottom surface" of the third accommodating space, and the second section 1402 and the third section 1403 of the connecting copper busbar 14 forming the "side surface" of the third accommodating space, the output negative copper busbar 4 is also used to form another "side surface" of the third accommodating space.

[0066] Preferably, the positive output copper busbar 3 includes a first section 301 and a second section 302 connected vertically in sequence. The first section 301 of the positive output copper busbar 3 extends along the length direction of the second capacitor 10 and is located above the negative power input copper busbar 2. The second section 302 of the positive output copper busbar 3 extends along the height direction of the second capacitor 10. Thus, a fourth accommodating space is formed between the first section 301 of the positive output copper busbar 3, the second section 302 of the positive output copper busbar 3, the second section 1402 of the connecting copper busbar 14, the third section 1403 of the connecting copper busbar 14, and the fourth section 204 of the negative power input copper busbar 2. In addition to the fourth section 204 of the power input negative copper busbar 2 forming the "bottom surface" of the third accommodating space, the second section 1402 and the third section 1403 of the copper busbar 14 forming the "side surface" of the third accommodating space, and the output negative copper busbar 4 forming another "side surface" of the third accommodating space, the first section 301 of the output positive copper busbar 3 forming the "top surface" of the third accommodating space, and the second section 302 of the output positive copper busbar 3 forming the "side surface" of the third accommodating space.

[0067] Preferably, the negative copper busbar 4 at the output terminal includes a first section 401 and a second section 402 connected vertically in sequence. The first section 401 of the negative copper busbar 4 extends along the height direction of the second capacitor 10 and is parallel to the third section 1403 of the connecting copper busbar 14. The second section 402 of the negative copper busbar 4 at the output terminal extends along the length direction of the first capacitor 8. The positive copper busbar 3 at the output terminal also includes a third section 303, which extends along the length direction of the first capacitor 8.

[0068] Preferably, the housing includes a first housing 5 and a second housing 6. A first capacitor 8 is disposed within the first housing 5, and a second capacitor 9 and a second capacitor 10 are disposed within the second housing 6. A connecting lug 13 is provided between the first housing 5 and the second housing 6 to strengthen the connection between them, thereby enhancing the stability of the boost module of the present invention.

[0069] Preferably, a water-cooled plate 15 is provided at the bottom of the housing, and a heat sink 7 is provided between the housing and the water-cooled plate 15 to enhance the heat dissipation effect between the housing and the water-cooled plate 15. The inductor 11 is located on one side of the water-cooled plate 15, and the IGBT module 12 is located on the other side of the water-cooled plate 15. Through the integration of the water-cooled plate 15, the inductor 11 and the IGBT module 12 can also be effectively cooled.

[0070] It should be noted that the embodiments of the present invention have better implementability and are not intended to limit the present invention in any way. Any person skilled in the art may use the above-disclosed technical content to change or modify it into equivalent effective embodiments. However, any modifications or equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A power module component for a boost module, characterized in that, It includes a capacitor module and a connecting copper busbar; the connecting copper busbar includes a power input positive copper busbar, a power input negative copper busbar, an output positive copper busbar and an output negative copper busbar, and the capacitor module includes a first capacitor and a second capacitor; The first capacitor is connected to the positive copper busbar of the power input and the negative copper busbar of the power input, and the second capacitor is connected to the positive copper busbar of the output and the negative copper busbar of the output. The power input negative copper busbar is connected to the output negative copper busbar; It also includes an inductor and an IGBT module. The input terminal of the inductor is connected to the first capacitor, and the output terminal of the inductor is connected to the IGBT module. The adapter copper busbar also includes a connecting copper busbar, one end of which is connected to the output terminal of the inductor, and the other end of which is connected to the input terminal of the IGBT module. The IGBT module includes a first IGBT unit and a second IGBT unit. The output terminal of the first IGBT unit is connected to the negative copper busbar of the output terminal, and the output terminal of the second IGBT unit is connected to the positive copper busbar of the output terminal. The current from the power supply terminal passes sequentially through the first capacitor, the inductor, the first IGBT unit and the second IGBT unit, and the second capacitor before being output. The first capacitor includes a first capacitor and a second capacitor; the first capacitor and the second capacitor are arranged vertically to form a first accommodating space between the first capacitor and the second capacitor, and the inductor and the IGBT module are placed in the first accommodating space; The negative copper busbar at the output terminal includes a first section and a second section connected vertically in sequence, and the positive copper busbar at the output terminal also includes a third section, which extends along the length direction of the first capacitor. The first section of the negative copper busbar at the output terminal extends along the height direction of the second capacitor and is parallel to the third section of the connecting copper busbar; the second section of the negative copper busbar at the output terminal extends along the length direction of the first capacitor.

2. The power module assembly according to claim 1, characterized in that, It also includes a housing, with the adapter copper busbar and the capacitor assembly disposed inside the housing, and the first accommodating space disposed outside the housing.

3. The power module assembly according to claim 2, characterized in that, The power input positive copper busbar includes a first section, a second section, and a third section connected vertically in sequence. The first section of the power input positive copper busbar extends along the length direction of the first capacitor, the second section of the power input positive copper busbar extends along the width direction of the first capacitor, and the third section of the power input positive copper busbar extends along the length direction of the first capacitor. The power input negative copper busbar includes a first section, a second section, and a third section connected vertically in sequence. The first section of the power input negative copper busbar extends along the length direction of the first capacitor, the second section of the power input negative copper busbar extends along the width direction of the first capacitor, and the third section of the power input negative copper busbar extends along the length direction of the first capacitor. The positive power input copper busbar is located above the negative power input copper busbar, thereby forming a second accommodating space between the second section of the positive power input copper busbar, the second section of the negative power input copper busbar, the third section of the positive power input copper busbar, and the third section of the negative power input copper busbar, and the first capacitor is placed in the second accommodating space.

4. The power module assembly according to claim 3, characterized in that, The power input positive copper busbar also includes a fourth section, which is perpendicularly connected to the third section of the power input positive copper busbar, and the fourth section of the power input positive copper busbar extends along the length direction of the second first capacitor. The negative copper busbar for power input also includes a fourth section, which is perpendicularly connected to the third section of the negative copper busbar for power input, and the fourth section of the positive copper busbar for power input extends along the length direction of the second first capacitor. This creates a third accommodating space between the fourth section of the positive power input copper busbar and the fourth section of the negative power input copper busbar, and the second first capacitor is placed within the third accommodating space.

5. The power module assembly according to claim 4, characterized in that, The connecting copper busbar includes a first section, a second section, and a third section that are connected vertically in sequence; the first section of the connecting copper busbar extends along the length direction of the first capacitor, the second section of the connecting copper busbar extends along the length direction of the second capacitor and the second capacitor, and the third section of the connecting copper busbar extends along the height direction of the second capacitor. Thus, the third accommodating space is formed between the fourth section of the positive power input copper busbar, the fourth section of the negative power input copper busbar, and the second section of the connecting copper busbar; Furthermore, a fourth accommodating space is formed between the second section of the connecting copper busbar, the third section of the connecting copper busbar, and the fourth section of the power input negative copper busbar, and the second capacitor is placed in the fourth accommodating space.

6. The power module assembly according to claim 5, characterized in that, The negative copper busbar at the output terminal extends along the height direction of the second capacitor and is parallel to the third section of the connecting copper busbar, thereby forming the fourth accommodating space with the third section of the connecting copper busbar.

7. The power module assembly according to claim 6, characterized in that, The positive output copper busbar includes a first section and a second section connected vertically in sequence. The first section of the positive output copper busbar extends along the length direction of the second capacitor and is located above the negative power input copper busbar. The second section of the positive output copper busbar extends along the height direction of the second capacitor. Thus, the fourth accommodating space is formed between the first section of the output positive copper busbar, the second section of the output positive copper busbar, the second section of the connecting copper busbar, the third section of the connecting copper busbar, and the fourth section of the power input negative copper busbar.

8. The power module assembly according to claim 2, characterized in that, The housing includes a first housing and a second housing, the first capacitor is disposed in the first housing, and the second capacitor and the second capacitor are disposed in the second housing; A connecting lug is provided between the first housing and the second housing.

9. The power module assembly according to claim 8, characterized in that, The bottom of the housing is provided with a water-cooling plate, and heat dissipation fins are provided between the housing and the water-cooling plate; The inductor is located on one side of the water-cooled plate, and the IGBT module is located on the other side of the water-cooled plate.

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