Power module assembly

Abstract

The utility model discloses a power module assembly, comprising a power module comprising a housing provided with a through hole; the conductive columns are arranged at the through holes, and the conductive columns are used for connecting the power module to the PCB; the PCB is arranged on one side of the power module in the first direction, and the PCB comprises an upper surface and a lower surface; the upper surface and the lower surface are located on the two opposite sides of the PCB in the first direction, and the lower surface faces the power module; the number of the jumper wire busbars is the same as that of the conductive columns, and each jumper wire busbar comprises a first connecting part which is electrically connected with the PCB; and the second connecting part is electrically connected with the conductive column. According to the utility model, the problems of complex terminal process and high cost of the power module in the current market can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronics technology, and in particular to a power module component. Background Technology

[0002] With the rapid development of new energy technologies, the increasing demands on power electronic devices for high voltage, high current, high power, and small size have rendered the performance of single power electronic devices insufficient. Therefore, numerous electronic devices such as diodes and IGBTs (Insulated-Gate Bipolar Transistors) are connected in series and parallel on a substrate to form power modules. These power modules are then connected to a PCB (Printed Circuit Board) to achieve functions such as energy conversion, power amplification, and circuit protection.

[0003] Current power modules on the market require terminals to be inserted into connection holes on a PCB board and then soldered to the PCB board, which is a complex and costly process. Utility Model Content

[0004] The purpose of this invention is to solve the problems of complex terminal manufacturing processes and high costs in current power modules on the market. This invention provides a power module and a power module assembly that effectively solves the problems of complex terminal manufacturing processes and high costs in current power modules on the market.

[0005] To address the aforementioned technical problems, this utility model discloses a power module assembly, comprising:

[0006] Power module, including:

[0007] The casing has a through hole;

[0008] A conductive post is provided at the through hole, and the conductive post is used to connect the power module to the PCB board;

[0009] A PCB board, disposed on one side of the power module along a first direction, the PCB board comprising:

[0010] upper surface;

[0011] The lower surface, along the first direction, the upper surface and the lower surface are located on opposite sides of the PCB board.

[0012] The lower surface faces the power module;

[0013] A jumper bus, wherein the number of jumper buses is the same as the number of conductive posts, and the jumper bus includes:

[0014] The first connecting part is electrically connected to the PCB board;

[0015] The second connecting part is electrically connected to the conductive post.

[0016] By employing the above technical solution, conductive posts are installed on the power module, and these posts are connected to the PCB board via jumper buses, thereby achieving electrical connection between the power module and the PCB board. The manufacturing process of the conductive posts is simple and cost-effective.

[0017] Furthermore, since the conductive posts are connected to the PCB board via jumper busbars, the conductive posts do not need to be perfectly aligned with the connection holes on the PCB board when connecting the power module to the PCB board. This effectively improves the efficiency of the connection between the power module and the PCB board, and also increases the flexibility of the circuit design on the PCB board.

[0018] According to a specific embodiment of the present invention, the jumper bus further includes a bent portion connected between the first connecting portion and the second connecting portion, such that along the first direction, the distance between the first connecting portion and the PCB board is less than or equal to the distance between the second connecting portion and the PCB board.

[0019] According to a specific embodiment of the present invention, the bent portion is deformable.

[0020] According to a specific embodiment of this utility model

[0021] The conductive pillar includes:

[0022] The first end is located inside the housing;

[0023] The second end extends out of the through hole and is located outside the housing;

[0024] The PCB board includes:

[0025] Each of the connecting holes extends through the PCB board along the first direction.

[0026] The number of connecting holes is the same as the number of conductive posts.

[0027] In each of the power modules, the second end of the conductive post passes through the connection hole and protrudes from the upper surface of the PCB board;

[0028] The first connection portion of the jumper bus is connected to the upper surface of the PCB board.

[0029] According to a specific embodiment of this utility model

[0030] The conductive pillar includes:

[0031] The first end is located inside the housing;

[0032] The second end extends out of the through hole and is located outside the housing, and along the first direction, the second end of the conductive post of each power module is located between the housing and the PCB board;

[0033] The first connection portion of the jumper bus is connected to the lower surface of the PCB board.

[0034] With the above technical solution, the second end of the conductive post is connected to the lower surface of the PCB board. As a result, the conductive post does not need to pass through the connection hole of the PCB board, which effectively avoids the problem of not being able to insert into the connection hole of the PCB board due to the poor position of the connection terminal of the power module.

[0035] According to a specific embodiment of this utility model

[0036] The conductive pillar includes:

[0037] The first end is located inside the housing;

[0038] The second end is located inside the through hole or flush with the outer surface of the housing;

[0039] The first connection portion of the jumper bus is connected to the lower surface of the PCB board.

[0040] According to a specific embodiment of the present invention, the PCB board further includes soldering holes;

[0041] Along the first direction, the solder hole penetrates the PCB board, and the solder hole is used for a soldering device to extend into to solder the second connection portion of the jumper bus to the conductive post.

[0042] By adopting the above technical solution, soldering holes are provided on the PCB board to facilitate the insertion of a soldering device to solder the second connection part of the jumper bus to the conductive post, and the soldering holes can reduce the weight of the PCB board.

[0043] According to a specific embodiment of the present invention, the power module assembly further includes:

[0044] A cooling plate is connected to the power module, and the power module is located between the cooling plate and the PCB board along the first direction.

[0045] According to a specific embodiment of this utility model, the conductive pillar is a copper pillar.

[0046] According to a specific embodiment of this utility model, the cross-section of the conductive post is circular. Attached Figure Description

[0047] Figure 1 A perspective view of the power module assembly in an embodiment of this utility model is shown.

[0048] Figure 2 A top view of the power module assembly in an embodiment of this utility model is shown.

[0049] Figure 3 This is a perspective view of the power module assembly after the PCB board is hidden in an embodiment of the present invention.

[0050] Figure 4 This is a perspective view of the power module of the power module assembly in an embodiment of the present invention.

[0051] Figure 5 A perspective sectional view of the power module assembly in an embodiment of this utility model is shown.

[0052] Figure 6 This is a perspective view of the jumper bus of the power module assembly in an embodiment of the present invention.

[0053] Figure 7 This is a perspective view showing the jumper bus of the power module assembly connected to the PCB board in an embodiment of the present invention.

[0054] Figure 8 This is a side view showing the jumper bus of the power module assembly connected to the PCB board and the power module in an embodiment of the present invention.

[0055] Figure 9 A top view showing the relative positional relationship between the conductive posts and jumper bus of the power module assembly in an embodiment of this utility model.

[0056] Figure 10 This is a perspective view of a power module assembly according to a modified embodiment of the present invention.

[0057] Figure 11 This is a perspective sectional view of a power module assembly according to a modified embodiment of the present invention.

[0058] Figure 12 The image shows a side view of a power module assembly with its jumper bus connected to a PCB board and a power module, according to a modified embodiment of the present invention.

[0059] Figure 13 This is a top view of a power module assembly according to a modified embodiment of the present invention.

[0060] Figure 14This is a top view showing the relative positional relationship between the conductive posts and jumper bus of a power module assembly according to a modified embodiment of the present invention.

[0061] Figure 15 A perspective view of a power module of a power module assembly according to another embodiment of the present invention is shown.

[0062] Explanation of icon numbers:

[0063] 10. Power module assembly;

[0064] 100. Power module; 110. Housing; 111. Through hole; 120. Conductive post; 121. First end; 122. Second end;

[0065] 200. PCB board, 201. Top surface, 202. Bottom surface, 210. Connecting hole, 220. Soldering hole;

[0066] 300. Cooling plate;

[0067] 400. Jumper bus; 410. First connection part; 420. Second connection part; 430. Bending part. Detailed Implementation

[0068] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0069] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0070] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model 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 the utility model.

[0071] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0072] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0073] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0074] refer to Figure 1 and Figure 2 This application provides a power module assembly 10, which includes three power modules 100, a PCB board 200, a cooling plate 300, and a jumper bus 400. The three power modules 100 are located between the PCB board 200 and the cooling plate 300 along a first direction X (i.e., the thickness direction of the power module assembly 10). Each of the three power modules 100 is electrically connected to the PCB board 200 via the jumper bus 400. The cooling plate 300 is connected to the power module 100 and is used to contact a cooling medium (e.g., cooling water) to remove heat dissipated by the power module 100, thereby providing heat dissipation for the power module assembly 10.

[0075] It should be noted that the specific number of power modules 100 in each power module assembly 10 is not specifically limited in the embodiments of this application. In some possible implementations, the number of power modules 100 in each power module assembly 10 may be one, two, four, or five, etc.

[0076] refer to Figure 3 and combined Figure 1 and Figure 2In this embodiment of the application, three power modules 100 are spaced apart along the second direction Y (i.e. the length direction of the power module assembly 10), and the second direction Y is perpendicular to the first direction X.

[0077] For example, refer to Figure 4 and combined Figure 2 and Figure 3 Each power module 100 includes a housing 110 and five conductive posts 120, with the housing 110 facing the PCB board 200 along the first direction X. Figure 1 Five through holes 111 are provided on one side of the housing 110 (i.e., the side of the housing 110 facing away from the cooling plate 300 along the first direction X). The five through holes 111 are spaced apart along the third direction Z (i.e., the width direction of the power module assembly 10). Each of the five through holes 111 corresponds to one of the five conductive posts 120. Each through hole 111 allows a conductive post 120 to extend out of the housing 110 and be electrically connected to the PCB board 200. The third direction Z is perpendicular to the first direction X and the second direction Y.

[0078] The present application does not impose a specific limit on the number of conductive posts 120 in each power module 100. For example, in other possible implementations, the number of conductive posts 120 in each power module 100 may be two, three, four, or six, etc. Correspondingly, the present application does not impose a specific limit on the number of through holes 111 in the housing 110 of each power module 100. Exemplarily, in other possible implementations, the number of through holes 111 in the housing 110 of each power module 100 may be two, three, four, or six, etc., and the number of through holes 111 in the housing 110 of each power module 100 is the same as the number of conductive posts 120.

[0079] Specifically, refer to Figure 5 and combined Figures 1 to 4 Each conductive post 120 extends along a first direction X, and each conductive post 120 includes a first end 121 and a second end 122, wherein the first end 121 is located inside the housing 110 of the power module 100 and is electrically connected to the electronic components inside the power module 100, and the second end 122 extends out of the through hole 111 and is located outside the housing 110, and the second end 122 is electrically connected to the PCB board 200 (see the following description for details).

[0080] For example, in this embodiment of the application, the cross-section of the conductive post 120 is circular, that is, the conductive post 120 in this embodiment of the application is a cylinder. However, it is not limited to this. In other possible embodiments, the cross-section of the conductive post 120 can also be rectangular, triangular, or other shapes.

[0081] It should be noted that in this embodiment, the housing 110 is a plastic housing. Specifically, in the production process of the power module 100 in this embodiment, the conductive pillar 120 and other electronic components inside the power module 100 are first placed into an injection molding machine (not shown in the figure), and then injection molding material is injected to encapsulate the electronic components and at least a portion of the conductive pillar 120. That is to say, in this embodiment, the hole wall (not shown in the figure) of the through hole 111 is in close contact with the conductive pillar 120, thereby giving the conductive pillar 120 better tolerances.

[0082] Continue to refer to Figure 5 The PCB board 200 includes an upper surface 201 and a lower surface 202. Along a first direction X, the upper surface 201 and the lower surface 202 are located on opposite sides of the PCB board 200. The lower surface 202 faces the power module 100 along the first direction X. The PCB board 200 has fifteen connection holes 210, each of which penetrates the PCB board 200 along the first direction X, and each of the fifteen connection holes 210 corresponds to a conductive post 120.

[0083] The present application does not impose a specific limit on the number of connection holes 210 on the PCB board 200, as long as the number of connection holes 210 is the same as the number of conductive posts 120.

[0084] In this embodiment of the application, the jumper bus 400 is configured such that its length direction is perpendicular to the power module assembly 10 ( Figure 1 and Figure 2 The second direction Y of the jumper bus 400 is the same as that of the power module assembly 10, the thickness direction is the same as that of the power module assembly 10, and the width direction is the same as that of the power module assembly 10. For ease of description, the following description will use the first direction X as the thickness direction of the jumper bus 400, the second direction Y as the length direction of the jumper bus 400, and the third direction Z as the width direction of the jumper bus 400. It should be noted that in other possible embodiments, the jumper bus 400 may be configured such that its length direction is the same as that of the power module assembly 10 in the third direction Z, or it may be configured such that its length direction is along another direction intersecting the second direction Y.

[0085] refer to Figure 6 and combined Figures 7 to 8 The jumper bus 400 includes a first connecting portion 410, a second connecting portion 420, and a bending portion 430. Along the second direction Y, the first connecting portion 410 and the second connecting portion 420 are located at opposite ends of the jumper bus 400, and the bending portion 430 is located between the first connecting portion 410 and the second connecting portion 420.

[0086] Specifically, refer to Figure 7 and Figure 8Along the first direction X, the first connecting portion 410 of the jumper bus 400 is connected to the upper surface 201 of the PCB board 200, and the second connecting portion 420 is located above the connecting hole 210. Furthermore, along the first direction X, the distance between the first connecting portion 410 and the PCB board 200 is less than the distance between the second connecting portion 420 and the PCB board 200. That is, along the first direction X, the first connecting portion 410 is closer to the PCB board 200 than the second connecting portion 420. However, this is not the only possibility; in other possible embodiments, the distance between the first connecting portion 410 and the PCB board 200 is equal to the distance between the second connecting portion 420 and the PCB board 200.

[0087] For example, refer to Figure 5 and Figure 8 The first connecting part 410 is electrically connected to the PCB board 200, and the second connecting part 420 is electrically connected to the conductive post 120.

[0088] refer to Figures 5 to 8 In this embodiment, along the first direction X, each jumper bus 400 is located on the side of the PCB board 200 away from the power module 100. Specifically, the second end 122 of each conductive post 120 of each power module 100 passes through the corresponding connection hole 210 along the first direction X and protrudes from the upper surface 201 of the PCB board 200. The second end 122 of the conductive post 120 is connected to the second connection portion 420 of the jumper bus 400 by means such as laser welding.

[0089] In this embodiment, a conductive post 120 is provided on the power module 100. The manufacturing process of the conductive post 120 is simple and the cost is lower. Furthermore, the conductive post 120 has good positional accuracy. When connecting the power module 100 to the PCB board 200, the conductive post 120 does not need to be completely aligned with the connection hole 210 of the PCB board 200. It is only necessary to ensure that the second end 122 of the conductive post 120 can pass through the connection hole 210 and be located above the PCB board 200 (i.e., on the side away from the power module 100) along the first direction X. Then, the conductive post 120 can be connected to the PCB board 200 through the jumper bus 400, thereby realizing the electrical connection between the power module 100 and the PCB board 200.

[0090] Specifically, refer to Figure 9 , Figure 9 In the circuit, the conductive post 120 on the left is aligned with the corresponding connection hole 210 (i.e., the axis of the conductive post 120 is the same as the axis of the connection hole 210), while the conductive post 120 on the right is biased to the left of the connection hole 210. However, the conductive post 120 can still be connected to the second connection part 420 of the jumper bus 400. Therefore, it will not affect the connection between the power module 100 and the PCB board 200, effectively improving the efficiency of the connection between the power module 100 and the PCB board 200.

[0091] Furthermore, the bend 430 of the jumper bus 400 is deformable, for example, possessing a certain degree of elasticity. This allows for some variation in the height (i.e., position in the first direction X) of the second connecting portion 420 after its first connecting portion 410 is connected to the PCB board 200. Thus, if the position of the second end 122 of the conductive post 120 in the first direction X is inconsistent due to manufacturing or installation errors, for example, relative to... Figure 8 In the case shown, the position of the second end 122 is offset upwards, which can also ensure that the second connection part 420 of the jumper bus 400 has a reliable electrical connection with the conductive post 120.

[0092] Further, refer to Figures 5 to 9 Using the above connection method, the conductive post 120 can be connected to any position on the PCB board 200 by simply passing the second end 122 of the conductive post 120 through the connection hole 210 via the jumper bus 400. This effectively improves the flexibility of circuit design on the PCB board 200. In other words, this embodiment does not impose specific limitations on the connection position between the first connection portion 410 of the jumper bus 400 and the PCB board 200, and adjustments can be made adaptively according to the circuit design on the PCB board 200. Correspondingly, this embodiment also does not impose specific limitations on the length of the jumper bus 400, and adjustments can be made adaptively according to the distance between the connection position of the first connection portion 410 and the PCB board 200 and the connection hole 210. For example, when the connection position of the first connection portion 410 and the PCB board 200 is far from the connection hole 210, the length of the jumper bus 400 is longer. When the connection position of the first connection portion 410 and the PCB board 200 is close to the connection hole 210, the length of the jumper bus 400 is shorter.

[0093] refer to Figures 10 to 14 In another possible implementation, along the first direction X, the second end 122 of the conductive post 120 of each power module 100 is located between the housing 110 of the power module 100 and the PCB board 200. Exemplarily, the first connection portion 410 of the jumper bus 400 is connected to the lower surface 202 of the PCB board 200, and the second connection portion 420 is connected to the second end 122 of the conductive post 120. That is, in Figures 10 to 14 In the embodiment shown, along the first direction X, the jumper bus 400 is located between the PCB board 200 and the housing 110 of the power module.

[0094] Exemplarily, the PCB board 200 has a plurality of soldering holes 220, each soldering hole 220 penetrating the PCB board 200 along a first direction X. Along the first direction X, each soldering hole 220 is opposite to a conductive post 120. The soldering holes 220 are used for a soldering device to extend into and solder the second connection portion 420 of the jumper bus 400 to the second end 122 of the conductive post 120. The number of soldering holes 220 is not specifically limited in this embodiment, as long as the number of soldering holes 220 is the same as the number of conductive posts 120. Exemplarily, the number of soldering holes 220 can be fifteen, twenty, or twenty-five, etc. Simultaneously, the soldering holes 220 effectively reduce the weight of the PCB board 200, which is beneficial for the lightweighting of the power module assembly 10.

[0095] It should be noted that in some other possible implementations, the PCB board 200 may not have solder holes 220.

[0096] In this embodiment, conductive posts 120 and jumper bus 400 are used to connect the power module 100 to the PCB board 200, and the second end 122 of the conductive post 120 is connected to the lower surface 202 of the PCB board 200. Therefore, the conductive post 120 does not need to pass through the PCB board 200, effectively avoiding the problem of the power module 100's connection terminals being unable to be inserted into the connection holes of the PCB board 200 due to poor positioning. Figure 11 and Figure 12 As shown, the second end 122 of the conductive post 120 extends out of the housing 110 along the first direction X, but not as... Figure 5 or Figure 8 The illustrated configuration extends through the PCB board 200, meaning the second end 122 is located between the housing 110 of the power module 100 and the PCB board 200. It should be understood that, in another possible implementation, the second end 122 of the conductive post 120 may not extend beyond the housing 110 of the power module 100, but may be within the through-hole 111 (e.g., slightly below the outer surface of the housing 110), or flush with the outer surface of the housing 110 of the power module 100 (e.g.,...). Figure 15 (As shown). In this case, since the jumper bus 400 is located between the PCB board 200 and the power module housing 110, and the second connection 420 is closer to the housing 110 than the first connection 410, the electrical connection between the second connection 420 and the second end 122 can be achieved by soldering (especially when the bend 430 has deformability).

[0097] Further, refer to Figure 14 and combined Figures 10 to 13By connecting the conductive post 120 to the PCB board 200 via the jumper bus 400, the flexibility of the circuit design on the PCB board 200 can be effectively improved. In other words, the connection position between the first connection portion 410 of the jumper bus 400 and the PCB board 200 is not specifically limited in this embodiment and can be adaptively adjusted according to the circuit design on the PCB board 200. Correspondingly, the length of the jumper bus 400 is also not specifically limited in this embodiment, and the distance between the connection position of the first connection portion 410 and the PCB board 200 and the connection hole 210 can be adaptively adjusted. For example, when the first connection portion 410 ( Figure 11 and Figure 12 (As shown) When the connection point of the first connection part 410 to the PCB board 200 is far from the connection hole 210, the jumper bus 400 is longer. When the connection point of the first connection part 410 to the PCB board 200 is close to the connection hole 210, the jumper bus 400 is shorter.

[0098] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A power module assembly, characterized in that, include: Power module, including: The casing has through holes; A conductive post is provided at the through hole, and the conductive post is used to connect the power module to the PCB board; A PCB board, disposed on one side of the power module along a first direction, the PCB board comprising: upper surface; The lower surface, along the first direction, the upper surface and the lower surface are located on opposite sides of the PCB board, and the lower surface faces the power module; A jumper bus, wherein the number of jumper buses is the same as the number of conductive posts, and the jumper bus includes: The first connecting part is electrically connected to the PCB board; The second connecting part is electrically connected to the conductive post.

2. The power module assembly as described in claim 1, characterized in that, The jumper bus also includes: A bent portion is connected between the first connecting portion and the second connecting portion, such that along the first direction, the distance between the first connecting portion and the PCB board is less than or equal to the distance between the second connecting portion and the PCB board.

3. The power module assembly as described in claim 2, characterized in that, The bent portion is deformable.

4. The power module assembly as described in any one of claims 1-3, characterized in that, The conductive pillar includes: The first end is located inside the housing; The second end extends out of the through hole and is located outside the housing; The PCB board includes: Each of the connecting holes penetrates the PCB board along the first direction, and the number of the connecting holes is the same as the number of the conductive posts. in, The second end of the conductive post of each power module passes through the connection hole and protrudes from the upper surface of the PCB board; The first connection portion of the jumper bus is connected to the upper surface of the PCB board.

5. The power module assembly as described in any one of claims 1-3, characterized in that, The conductive pillar includes: The first end is located inside the housing; The second end extends out of the through hole and is located outside the housing, and along the first direction, the second end of the conductive post of each power module is located between the housing and the PCB board; The first connection portion of the jumper bus is connected to the lower surface of the PCB board.

6. The power module assembly as described in any one of claims 1-3, characterized in that, The conductive pillar includes: The first end is located inside the housing; The second end is located inside the through hole or flush with the outer surface of the housing; The first connection portion of the jumper bus is connected to the lower surface of the PCB board.

7. The power module assembly as described in claim 5 or 6, characterized in that, The PCB board also includes solder holes; Along the first direction, the solder hole penetrates the PCB board, and the solder hole is used for a soldering device to extend into to solder the second connection portion of the jumper bus to the conductive post.

8. The power module assembly as claimed in claim 1, characterized in that, The power module assembly also includes: A cooling plate is connected to the power module, and the power module is located between the cooling plate and the PCB board along the first direction.

9. The power module assembly as claimed in claim 1, characterized in that, The conductive pillar is a copper pillar.

10. The power module assembly as claimed in claim 1, characterized in that, The conductive post has a circular cross-section.

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