Power electronics system

Abstract

The present invention relates to a power electronic system (2) comprising: at least one electronic device; a printed circuit board (4) on which a plurality of electrical components are mounted; and positive and negative polarity connection components (6) configured to electrically connect the electronic device to an energy storage device, each polarity connection component (6) being formed by a first polarity branch (8, 12) and a second polarity branch (10, 14) that are different from each other and electrically connected to each other, the first positive polarity branch (8) and the first negative polarity branch (12) being electrically connected to the second positive polarity branch (10) and the second negative polarity branch (14) respectively via the printed circuit board (4).

Description

Technical Field

[0001] This invention relates to the fields of electronics and electrical engineering, and more particularly to the field of power electronic equipment. Background Technology

[0002] Power electronic devices are electrical devices integrated into many devices, particularly motor vehicles such as electric or hybrid vehicles. These power electronic devices typically include a housing and a printed circuit board. The housing defines an internal space containing at least one electrical component, and other components, such as integrated circuits, capacitors, or inductors, are mounted on the printed circuit board.

[0003] These power electronic devices can be, in particular, voltage converters used to convert between DC and AC currents. In electric or hybrid vehicles, these voltage converters are typically positioned between an energy storage device and a motor designed to generate torque to drive the vehicle and enable it to move.

[0004] For this purpose, the power electronic device is electrically connected to the energy storage device via a first electrical connection component and electrically connected to the motor via a second electrical connection component. The power electronic device includes multiple electronic components that are disposed on both sides of a printed circuit board and are capable of switching current between the two connection components.

[0005] Among these electrical components, for example, one can note the presence of capacitors used to smooth voltage spikes during the operation of power electronic equipment. These capacitors must be connected to the energy storage device and the printed circuit board (PCB). Positioning the capacitor may involve connecting it to the energy storage device via electrical connection components that pass through the PCB. This involves providing orifices in the PCB large enough to allow the connection buses forming these electrical connection components to pass through. In this case, current should also flow through the PCB, both to power the electronic components and to retrieve information related to the current flowing between the energy storage device and the power electronic equipment, for example, to control the operation of the electronic components and issue appropriate control commands to them. For retrieving this information, a known practice is to extend the connection bus from the first electrical connection component to a signal pin on the PCB, the signal pin being connected to the PCB via its free end opposite the first electrical connection component. Notably, the known practice is to allow the end of the signal pin to pass through the PCB so that this end mates with an onboard fastener on the PCB.

[0006] While this solution is feasible, it is not optimal because, understandably, the precise positioning of the signal pin ends within the fastener is crucial, and the fact that these pins are carried by the connection bus of the first electrical connection assembly introduces significant manufacturing and assembly tolerances. Furthermore, signal pins are typically manufactured in thin strips, which are easily bent, and their suspended positioning on the connection bus facilitates this bending. As a result of this observation, the ends of the signal pins can be press-fitted into the fastener through friction with it, forming material particles in the pins. Moreover, this arrangement necessitates positioning the signal pins near the connection bus of the first electrical connection assembly.

[0007] This invention falls within this context and proposes measures to mitigate at least some of the disadvantages of the prior art. Specifically, this invention provides a power electronic system in which current can be efficiently transmitted within electrical connection components passing through a printed circuit board, and in which a portion of the current flowing between an energy storage device and an electronic device through these electrical connection components can be collected at the printed circuit board, without strong limitations on the positioning of the printed circuit board relative to the electronic device. Summary of the Invention

[0008] Therefore, the present invention relates to a power electronic system comprising: at least one electronic device; a printed circuit board on which a plurality of electrical components are mounted; and positive and negative polarity connection assemblies configured to electrically connect the electronic device to an energy storage device, wherein each connection assembly of a given polarity is formed by a first polarity branch and a second polarity branch that are different from each other and electrically connected to each other, and the first positive polarity branch and the first negative polarity branch are electrically connected to the second positive polarity branch and the second negative polarity branch, respectively, via the printed circuit board.

[0009] Power electronic systems can form voltage converters specifically configured to convert between DC and AC currents. For this purpose, power electronic systems are positioned between energy storage devices and motors. For example, the electronic devices form capacitors that allow voltage spikes to be smoothed during the conversion process.

[0010] These positive and negative polarity connection components ensure the electrical connection between the energy storage device and the power electronic system via electrical equipment.

[0011] Each positive and negative connection assembly is formed by a first branch and a second branch, respectively, which are connected to each other to form the connection assembly, allowing a high-voltage (i.e., at least 800 V) current to flow within it. This two-branch manufacturing process simplifies the assembly of power electronic systems, particularly by enabling the attachment of one branch of the connection assembly to an electronic device and the other branch to an energy storage device in a first step, followed by connecting them to each other in a second step.

[0012] According to the present invention, two branches of the same connection component, namely two positive branches together and / or two negative branches together, are directly fixed to a printed circuit board, such that current can flow through the printed circuit board from one branch of a given polarity to the other branch of the given polarity. In other words, the current flowing through the connection component of a given polarity flows between the first branch and the second branch of that polarity, and flows through the printed circuit board.

[0013] By limiting the number of components required to ensure electrical connections between energy storage devices, electronic devices, and printed circuit boards, it is easier to assemble power electronic systems by directly attaching polarity branches to printed circuit boards.

[0014] This configuration is particularly advantageous when, for a given positive or negative connection assembly, one branch connects to an electrical device located on one side of the printed circuit board, while the other branch connects to an energy storage device arranged on the other side of the printed circuit board. This is especially advantageous when the connection assembly must pass from one side of the printed circuit board to the other. The configuration of the present invention allows current to flow within the connection assembly without requiring a large hole to be drilled in the printed circuit board, which would facilitate the passage of one of the branches through the board.

[0015] According to one feature of the invention, a first positive branch is fixed to a second positive branch by a first fastening element, and a first negative branch is fixed to a second negative branch by a second fastening element, the first fastening element and the second fastening element extending through the printed circuit board.

[0016] For a given connection assembly, a first branch presses against one side of the printed circuit board, a second branch presses against the other side of the printed circuit board, and corresponding fastening elements pass through the printed circuit board to connect them to each other by securing them to the printed circuit board. These fastening elements ensure that the polarity branches are properly secured to and positioned relative to the printed circuit board. Furthermore, these fastening elements can be formed of a metallic material, which facilitates the flow of current between branches of a given polarity.

[0017] According to one feature of the invention, each of the positive polarity branches includes a first aperture, each of the negative polarity branches includes a second aperture, and the printed circuit board includes a first opening facing the first aperture and a second opening facing the second aperture, the diameter of the opening being smaller than the diameter of the associated aperture.

[0018] The diameter difference between the opening and the corresponding orifice ensures easy assembly without requiring perfect center alignment between the opening and orifice. Furthermore, to accurately position and hold fastening elements in their fastened positions, the size of one of the holes should be adjusted to match the size of the fastening element (e.g., the fastening screw shank), and advantageously, the opening formed in the printed circuit board has this adjusted size to limit space loss on the printed circuit board due to the assembly. Additionally, this ensures that the electrical tracks of the printed circuit board surrounding the opening contact the branches pressing against either side of the printed circuit board as closely as possible.

[0019] According to one feature of the invention, each fastening element includes a nut embedded in the material of one of the polarity branches and a tightening screw complementary to the nut, the tightening screw being capable of sequentially passing through one of the branches of a given polarity, a printed circuit board, and the other of the given polarity.

[0020] This structure of fastening elements makes assembly easier by limiting the number of parts involved in causing the branches of a connecting component of a given polarity to point toward each other.

[0021] According to one feature of the invention, each fastening element is configured to orient a first branch of the connecting assembly and a second branch of the connecting assembly toward each other, such that a printed circuit board is compressed between the first polarity branch and the second polarity branch.

[0022] Therefore, it is ensured that each polarity branch forming the electrical connection assembly is indeed in contact with the printed circuit board. Furthermore, this proximity makes the assembly formed by the polarity branches and the printed circuit board more rigid, limiting the risk of degradation due to parasitic movement.

[0023] According to one feature of the invention, one end of the first polarity branch and the second polarity branch abuts against the printed circuit board in a planar manner. This planar abutment maximizes the contact area between the polarity branch and the printed circuit board.

[0024] According to one feature of the invention, the printed circuit board includes a first electrical connection rail in contact with a first positive branch and a second positive branch, and a second electrical connection rail in contact with a first negative branch and a second negative branch. The first and second electrical connection rails are configured such that high-voltage current can flow between the branches of the same connection component. Through these electrical connection rails, high-voltage current can flow directly through the thickness of the printed circuit board.

[0025] According to one feature of the invention, a first electrical signal transmission track is electrically connected to a first electrical connection track, and a second electrical signal transmission track is electrically connected to a second electrical connection track.

[0026] The electrical connection between the first electrical signal transmission track and the first electrical connection track enables the first signal transmission track to be electrically connected to the positive polarity connection component, and the electrical connection between the second electrical signal transmission track and the second electrical connection track enables the second signal transmission track to be electrically connected to the negative polarity connection component. Therefore, the power electronic system can directly retrieve information related to the current flowing through each positive and negative polarity connection component via electrical tracks generated in the printed circuit board.

[0027] According to one feature of the invention, the first and second electrical signal transmission tracks are configured such that low-voltage current can flow.

[0028] These electrical signal transmission tracks enable the control unit to collect information related to the current flowing through the connection components without having to connect other pins to the printed circuit board.

[0029] The present invention also relates to a motor vehicle including a power electronic system according to the present invention. Attached Figure Description

[0030] On the one hand, other features, details, and advantages of the invention will become clearer from reading the following description, and on the other hand, from reading the various examples of embodiments given indicatively and non-limitingly with reference to the accompanying schematic diagrams, wherein:

[0031] [ Figure 1 A schematic view of a power electronic system is shown, illustrating a first side of a printed circuit board to which a first positive branch and a first negative branch are fixed.

[0032] [ Figure 2 [Illustratively depicts what can be done] Figure 1 The view of the power electronic system shown in the image shows a second side of the printed circuit board opposite to the first side, and a second positive branch and a second negative branch are fixed to the second side.

[0033] [ Figure 3 A schematic cross-sectional view of a printed circuit board at the junction between a first polarity branch and a second polarity branch is shown, illustrating how the polarity branch is secured by a first fastening element and a second fastening element.

[0034] [ Figure 4 A schematic cross-sectional view of a printed circuit board at the negative polarity branch is shown, illustrating the engagement between a screw and nut of a fastening element embedded in the material of the first negative polarity branch.

[0035] The features, variations, and various embodiments of the present invention can be associated with each other in various combinations, provided that they are not incompatible or mutually exclusive. Variations of the invention that include only the selection of the features described below, separate from the other features, are particularly conceivable if the selection of these features is sufficient to provide a technical advantage and / or distinguish the invention from the prior art.

[0036] In the accompanying drawings, elements common to multiple drawings retain the same reference numerals. Detailed Implementation

[0037] Figure 1 and Figure 2 A power electronic system 2 according to an embodiment of the present invention is schematically illustrated. In the depicted embodiment, the power electronic system 2 is intended to be installed in an electric vehicle or a hybrid vehicle.

[0038] More specifically, in the illustrated embodiment, the power electronic system 2 forms a voltage converter within the electric or hybrid vehicle, located between an energy storage device capable of storing and transmitting electrical energy and a motor capable of generating drive torque, thereby enabling the electric or hybrid vehicle to move. Therefore, the power electronic system 2 can convert the current flowing between the motor and the energy storage device, allowing the motor to receive AC current and the energy storage device to receive DC current.

[0039] For this purpose, the power electronic system 2 includes a housing 3, which houses at least the electronic device 5 and the printed circuit board 4, which are schematically depicted herein.

[0040] The printed circuit board 4 includes multiple electrical components, and transistors 7 are schematically depicted, for example, on one side of the printed circuit board. These electrical components are powered and interconnected via electrical tracks formed in the printed circuit board. These electrical components are configured to perform voltage conversion functions individually or in combination with each other, particularly through the operation of an electronic device 5 integrated into a housing and also connected to the printed circuit board. The printed circuit board 4 is particularly capable of controlling the operation of the power electronics system 2 according to requests sent by the user of the electric or hybrid vehicle.

[0041] Electronic device 5 here is a capacitor, which allows voltage peaks to be smoothed during conversion, thereby stabilizing the voltage flowing through power electronic system 2. The electrical connection between electronic device 5 and the energy storage device is ensured by positive and negative electrical connection components 6 of power electronic system 2, respectively. Electrical connection components 6 are designed to allow high-voltage currents on the order of 800 V to flow between the energy storage device and the electronic device.

[0042] Each connection component is formed by a first polarity branch and a second polarity branch different from the first polarity branch, the first polarity branch and the second polarity branch being electrically connected to each other. The positive polarity branch is referred to as the branch intended to form a positive polarity connection component, and the negative polarity branch is referred to as the branch intended to form a negative polarity connection component. Therefore, the positive polarity connection component is formed by the first positive polarity branch 8 and the second positive polarity branch 10. The negative polarity connection component is formed by the first negative polarity branch 12 and the second negative polarity branch 14.

[0043] like Figure 1 As can be clearly seen, it shows a first side 18 of the printed circuit board 4, with a first positive branch 8 and a first negative branch 12 extending on one side of the printed circuit board, and more specifically on one side of the first side 18. These first branches each press one end against the first side 18 of the printed circuit board, and each has a free end intended for electrical connection to an energy storage device not shown here.

[0044] Furthermore, and as Figure 2 It can be clearly seen in the middle, Figure 2 A second side 20 of the printed circuit board 4, opposite the first side 18, is shown. A second positive branch 10 and a second negative branch 14 extend on the same side of the printed circuit board, and more specifically on one side of this second side 20. These second branches also each press one end against one side of the printed circuit board, here the second side 20, and they have a complex shape that allows them to be electrically connected to the electronic device 5.

[0045] According to the invention, a first positive branch 8 is electrically connected to a second positive branch 10 to form a positive connection assembly via a printed circuit board 4 and more particularly in a first dedicated connection region on the printed circuit board, and a first negative branch 12 is electrically connected to a second negative branch 14 to form a negative connection assembly via the same printed circuit board 4 in a second connection region on the printed circuit board that is different from the first connection region.

[0046] Given the above description, it should be understood that, in conjunction with the electrical connections of the polarity branches of the connection components that respectively form a given polarity, the current flowing from the energy storage device to the electronic device in the positive or negative polarity connection component flows sequentially through the first positive branch 8 or the first negative branch 12, then through the printed circuit board 4, and finally through the second positive branch 10 or the first negative branch 14, respectively. Conversely, when the current flows from the electronic device to the energy storage device, the current flows sequentially through the first polarity branches 8 and 12, the printed circuit board 4, and then through the second polarity branches 10 and 14.

[0047] This electrical connection occurs because, on the one hand, such as Figure 1As shown, the first polarity branches 8 and 12 are directly fixed to the printed circuit board 4 and are in the same connection area, and because... Figure 2 As shown, the second polarity branches 10 and 14 are directly fixed to the printed circuit board 4 and are in the same connection area.

[0048] To achieve optimal electrical connection between each branch of the connection assembly 6 forming a given polarity and the printed circuit board 4, each end of the branches 8, 10, 12, 14 of the connection assembly 6 intended to contact the printed circuit board includes an abutment portion that is substantially flat and extends substantially at right angles to the adjacent base, so as to form a surface for receiving the screw head of the tightening device described below and to form a planar abutment with the printed circuit board 4. This planar abutment between the positive or negative polarity branch and the printed circuit board 4 ensures a large contact surface area, which on the one hand ensures contact in areas where high voltage current may flow, and on the other hand ensures a stable mechanical connection.

[0049] The first positive branch 8 is secured to the second positive branch 10 by a first fastening element 22, and the first negative branch 12 is secured to the second negative branch 14 by a second fastening element 24, each fastening element extending through the printed circuit board. Advantageously, the same fastening devices are used to connect the two branches of the same connecting assembly together and to ensure contact between these branches and the printed circuit board. This allows the fastening devices to be limited to those used for transmitting current from the energy storage device to the electronic device 5 and for transmitting current to the printed circuit board.

[0050] from Figure 3 It can be seen from this that Figure 3 A cross-sectional view is shown at the junction between the first positive polarity branch 8 and the second positive polarity branch 10 on one side and the first negative polarity branch 12 and the second negative polarity branch 14 on the other side. Each fastening element 22, 24 is formed by the engagement between a screw 26 and a nut 28, the nut 28 being embedded in the material of the flat portion of one of the branches, here embedded in the material of the flat portion of the corresponding first branch.

[0051] The tightening screw 26 passes sequentially through the second positive branch 10 or the second negative branch 14, the printed circuit board 4, and the first positive branch 8 or the first negative branch 12, and then engages with a nut 28 of a complementary shape, that is, a thread engagement complementary to the thread 30 of the tightening screw 26. The tightening screw 26 includes a screw head 32 that presses against an adjacent portion formed at one end of the second branch, and the engagement of the tightening screw and nut 28 has the effect of applying pressure to the second negative branch 14 via the screw head. It should be understood that in this way, when the tightening screw 26 is screwed in, the adjacent portions of the two branches of the same electrical connection assembly move closer to each other, and the first and second branches of the same polarity compress the printed circuit board 4.

[0052] Positive branches 8 and 10, which facilitate the formation of a positive polarity connection assembly, each include a hole, and negative branches 12 and 14, which facilitate the formation of a negative polarity connection assembly, each include an aperture 34. The printed circuit board 4 includes a first opening aligned with the hole and a second opening 36 aligned with the aperture 34. The diameter of the opening is smaller than the diameter of the aperture and the hole.

[0053] More specifically, consider Figure 4 The diagram shows a cross-sectional view at the second fastening element 24 associated with the two negative polarity branches 12, 14, where the diameters of the orifices 34 formed in the planar adjacent portions of the first negative polarity branch 12 and the second negative polarity branch 14 are substantially equal. The diameter of the second opening 36 is smaller than that of the second orifice 34, allowing for greater flexibility in the placement of the tightening screw 26 relative to the negative polarity branches 12, 14, which facilitates assembly. The smaller diameter of the second opening 36 also allows for relatively precise positioning of the negative polarity branches 12, 14 relative to the printed circuit board 4.

[0054] As a result of this configuration, the current flowing within the electrical connection assembly (that is, between the first positive branch 8 or the first negative branch 12 and the second positive branch 10 or the second negative branch 14) flows directly through the printed circuit board 4. For this purpose, the printed circuit board includes components that can... Figure 3 The first electrical connection track 38 seen in the image can be... Figure 3 and Figure 4 The second electrical connection rail 40 is seen in the image. These electrical connection rails 38, 40 are formed of copper and are configured to ensure that high-voltage current flows between the first polarity branches 8, 12 and the second polarity branches 10, 14.

[0055] More specifically, these electrical connection tracks 38, 40 are formed within the thickness of the printed circuit board 4. This thickness is measured along the shortest segment of the first side 18 and the second side 20 of the bonded printed circuit board 4.

[0056] When assembling the power electronic system 2, the first electrical connection track 38 contacts the first positive branch 8 and the second positive branch 10, thereby forming an electrical continuity between these branches and thus forming a positive electrical connection assembly. The second electrical connection track 40, in itself, contacts the first negative branch 12 and the second negative branch 14, thereby forming an electrical continuity between these branches and thus forming a negative electrical connection assembly.

[0057] These electrical connection tracks 38, 40 have the shape of eyelets surrounding the opening associated with the polarity branch 6. It is worth noting that, in Figure 4 In the illustrated embodiment, these electrical connection tracks 38, 40 do not extend to the edge of the printed circuit board defining the periphery of the associated opening, such that the edge of the printed circuit board defining the opening does not contact the associated electrical connection tracks 38, 40.

[0058] Electrical connection rails 38 and 40 extend through the thickness of the printed circuit board 4 to be flush with the first side 18 and the second side 20 of the printed circuit board 4. Thus, when assembling the power electronic system 2, the connection components 6 contact the corresponding electrical connection rails 38 and 40 through each of the two branches that constitute them, and current can flow through the printed circuit board 4 from the first polarity branch 8 and 12 within the same connection component 6 to the associated second polarity branch 10 and 14.

[0059] Of course, the first electrical connection rail 38 and the second electrical connection rail 40 do not touch each other to avoid any malfunction of the power electronic system 2. In this respect, while it is desirable for the connection areas formed on the printed circuit board to be close to each other to make it easier to manage overloads of the connection components in the power electronic system, they are spaced far enough apart that the electrical connection rails can extend fully without touching each other.

[0060] Furthermore, the printed circuit board 4 includes a first electrical signal transmission track electrically connected to the positive terminal connection component and a second electrical signal transmission track electrically connected to the negative terminal connection component. This electrical signal transmission track 50... Figure 4 The branches 12 and 14 that constitute the negative polarity connection component are schematically shown, but a similar structure can be implemented for the positive polarity connection component.

[0061] These electrical signal transmission tracks 50 enable the control unit to collect information related to the current flowing through the polarity branch. For this purpose, the electrical signal transmission tracks 50 travel on the printed circuit board 4 to the control unit itself or to electronic components communicating with the control unit.

[0062] Like the electrical connection rails 38 and 40, the electrical signal transmission rails 50 are made of copper. However, the thickness of these electrical signal transmission rails 50 is less than that of the electrical connection rails 38 and 40. This is because the electrical connection rails 38 and 40 are configured to ensure the flow of high-voltage current, while the electrical signal transmission rails are configured to ensure the flow of low-voltage current. In the example shown, the electrical signal transmission rails are located substantially at the center of the thickness of the printed circuit board, which does not limit the invention.

[0063] To ensure simple manufacturing of the printed circuit board 4, the electrical signal transmission track 50 extends directly from the electrical connection tracks 38 and 40. Therefore, the first electrical signal transmission track extends from the first electrical connection track 38, and the second electrical signal transmission track 50 extends from the second electrical connection track 40, as shown below. Figure 4 As shown. It should be understood that the electrical signal transmission track is electrically connected to the associated electrical connection component 6 via the corresponding electrical connection tracks 38 and 40.

[0064] This structure, which implements electrical tracks within the printed circuit board 4, eliminates the limitations associated with the implementation of pins connected to the printed circuit board 4, thereby ensuring that information related to the current flowing through each polarity branch 6 is retrieved through a single component on the printed circuit board.

[0065] As described above, the present invention achieves its set objectives by proposing a power electronic system in which information relating to the current flowing between an energy storage device and an electronic device of the power electronic system is collected via an electrical rail directly electrically connected to a polarity branch fixed on a printed circuit board.

[0066] However, the invention is not limited to the devices and configurations described and shown herein, and it extends to any equivalent devices and configurations and any technically effective combinations thereof.

[0067] Alternatively, printed circuit boards (PCBs) can be those with components integrated into their internal structure, such as those produced by furnace soldering. These boards contain more copper to achieve greater power.

[0068] In one embodiment of this alternative, a plug-in, such as a copper plug-in, is inserted between the board and the second polarity branch 14. A plug-in can also be inserted between the first polarity branch 12 and the board. The compressibility of the plug-in prevents the board from being compressed.

Claims

1. A power electronic system (2), comprising: At least one electronic device; Printed circuit board (4), on which multiple electrical components are mounted; And positive and negative polarity connection components (6) configured to electrically connect the electronic device to an energy storage device, each connection component (6) of a given polarity is formed by a first polarity branch (8, 12) and a second polarity branch (10, 14) that are different from each other and electrically connected to each other, the first positive polarity branch (8) and the first negative polarity branch (12) being electrically connected to the second positive polarity branch (10) and the second negative polarity branch (14) respectively via the printed circuit board (4).

2. The power electronic system (2) according to claim 1, wherein, The first positive branch (8) is fixed to the second positive branch (10) by the first fastening element (22), and the first negative branch (12) is fixed to the second negative branch (14) by the second fastening element (24). The first fastening element (22) and the second fastening element (24) extend through the printed circuit board (4).

3. The power electronic system (2) according to claim 2, wherein, The positive polarity branches (8, 10) each include a first aperture, and the negative polarity branches (12, 14) each include a second aperture (34). The printed circuit board (4) includes a first opening facing the first aperture and a second opening (36) facing the second aperture (34), the diameter of which is smaller than the diameter of the associated aperture.

4. The power electronic system (2) according to claim 2 or 3, wherein, Each fastening element (22, 24) includes a nut (28) and a clamping screw (26), the nut (28) being embedded in the material of one of the polarity branches (6), the clamping screw (26) being complementary to the nut (28) and capable of passing sequentially through one of the branches of a given polarity, the printed circuit board (4), and the other of the branches of the given polarity.

5. The power electronic system (2) according to any one of claims 2 to 4, wherein, Each fastening element (22, 24) is configured to orient the first polar branch (8, 12) of the connecting assembly and the second polar branch (10, 14) of the connecting assembly toward each other, such that the printed circuit board (4) is compressed between the first polar branch (8, 12) and the second polar branch (10, 14).

6. The power electronic system (2) according to any one of claims 1 to 5, wherein, One end of the first polar branch (8, 12) and one end of the second polar branch (10, 14) abut against the printed circuit board (4) in a planar manner.

7. The power electronic system (2) according to any one of claims 1 to 6, wherein, The printed circuit board (4) includes a first electrical connection rail (38) in contact with the first positive branch (8) and the second positive branch (10) and a second electrical connection rail (40) in contact with the first negative branch (12) and the second negative branch (14), the first electrical connection rail (38) and the second electrical connection rail (40) being configured to allow high voltage current to flow between branches of the same connection assembly (6).

8. The power electronic system (2) according to claim 7, wherein, The first electrical signal transmission track is electrically connected to the first electrical connection track (38), and the second electrical signal transmission track is electrically connected to the second electrical connection track (40).

9. The power electronic system (2) according to any one of claims 7 and 8, wherein, The first and second electrical signal transmission tracks are configured to allow low-voltage current to flow.

10. A motor vehicle having a power electronic system (2) according to any one of claims 1 to 9.

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