Busbar capacitor, motor controller, electric drive system and vehicle

Abstract

The present disclosure relates to a bus capacitor, a motor controller, an electric drive system and a vehicle. The bus capacitor comprises a capacitor core and a first electrical connector. The first electrical connector comprises a main body portion and a connecting portion. A first end of the main body portion is connected to the capacitor core. A second end of the main body portion is connected to a first end of the connecting portion. A second end of the connecting portion is configured to be connected to a second electrical connector of a power module. The second electrical connector is located on a first side of the main body portion. The second end of the connecting portion is located on a second side of the main body portion. The second side is different from the first side. The bus capacitor can reduce the parallel length of the connecting portion and the second electrical connector in the current loop between the capacitor core and the power module. This can reduce the parasitic inductance in the current loop between the power module and the bus capacitor. This can reduce the voltage when the power module switches. This can reduce the risk of damage due to overvoltage breakdown.

Description

Technical Field

[0001] This disclosure relates to the field of motor controller technology, specifically to a bus capacitor, a motor controller, an electric drive system, and a vehicle. Background Technology

[0002] As the core component of the motor controller, the power module realizes the conversion and control of electrical energy form through high-speed switching action, inverting DC power into AC power with adjustable frequency / amplitude to drive the motor, and precisely adjusting the power output to meet the load requirements. However, the power module in related technologies is prone to damage due to overvoltage breakdown during switching. Utility Model Content

[0003] To overcome the problems existing in the related technologies, this disclosure provides a bus capacitor, a motor controller, an electric drive system, and a vehicle.

[0004] According to a first aspect of the present disclosure, a bus capacitor is provided, including a capacitor core and a first electrical connector;

[0005] The first electrical connector includes a main body and a connecting part. A first end of the main body is connected to the capacitor core, and a second end of the main body is connected to the first end of the connecting part. The second end of the connecting part is used to connect to a second electrical connector of the power module. The second electrical connector is located on the first side of the main body.

[0006] The second end of the connecting portion is located on the second side of the main body portion, and the second side and the first side are different sides of the main body portion.

[0007] Compared to bus capacitors in related technologies where the second end of the connection portion is located on the side of the main body facing the power module, the second end of the connection portion of the bus capacitor provided in this disclosure is located on the second side of the main body, meaning the second end of the connection portion does not extend towards the power module. This allows the current flow between the capacitor core and the power module to bypass the entire parallel section of the connection portion and the second connector. Therefore, the bus capacitor of this disclosure can be connected in parallel with the second electrical connector via the connection portion, making the conductive connection between the first and second electrical connectors convenient and reliable. It also reduces the parallel length of the connection portion and the second electrical connector in the current loop between the capacitor core and the power module, thereby reducing the parasitic inductance in the current loop between the power module and the bus capacitor. This, in turn, helps to reduce the voltage of the power module during switching and reduces the risk of damage to the power module due to overvoltage breakdown.

[0008] In some possible implementations, the second side is located on the side opposite to the first side.

[0009] With this design, the space on the adjacent side of the first side of the main body will not be occupied by the connecting part, which is conducive to expanding the arrangement space on the adjacent side of the first side of the main body. For example, when the first electrical connector includes a first positive connector and a first negative connector, it is convenient for the first positive connector and the first negative connector to be arranged adjacent to each other. For example, when there are at least three first electrical connectors, it is convenient for at least three first electrical connectors to be arranged adjacent to each other.

[0010] In some possible implementations, the main body extends along a first direction, and the connecting portion extends from a second end of the main body toward the second side along a second direction, wherein the first direction is perpendicular to the second direction.

[0011] This design allows the connecting part to have sufficient connection length to connect with the second electrical connector, and prevents the bus capacitor from being too large in the first direction, thereby reducing the space occupied by the bus capacitor and thus facilitating the miniaturization of the motor controller.

[0012] In some possible implementations, the connecting portion is used to be fitted and connected to the second electrical connector.

[0013] The connection part is closely attached to the second electrical connector, which helps to increase the number of conductive contact points between the two. Even if the connection between the connection part and the second electrical connector is unstable, they can still maintain conductivity, thereby improving the reliability of the electrical connection between the bus capacitor and the power module.

[0014] In some possible implementations, the connecting portion is provided with a first mounting hole, which is used to connect with a second mounting hole on the second electrical connector.

[0015] This method achieves a close connection between the connecting part and the second connecting piece, which is easy to operate, ensures connection quality, and allows for separation between the connecting part and the second connecting piece, thus facilitating the individual repair or replacement of the bus capacitor or power module.

[0016] In some possible implementations, the bus capacitor further includes a housing;

[0017] The capacitor core is located inside the housing;

[0018] The first end of the main body is located inside the housing, and the second end of the main body is located outside the housing.

[0019] The casing can isolate the capacitor core from the outside world, protecting the capacitor core from damage and preventing insulation failure between the capacitor core and other components.

[0020] In some possible implementations, the housing is adapted to be stacked with the power module along a first direction, the main body extends along the first direction, and the connecting portion extends along a second direction perpendicular to the first direction.

[0021] The housing and power module are stacked along the first direction, which helps to reduce the space occupied by the bus capacitor and the power module as a whole, thereby helping to reduce the overall size of the motor controller and thus helping to improve the power density of the electric drive system.

[0022] Furthermore, the main body extends along the first direction, and the connecting part extends along the second direction perpendicular to the first direction, which facilitates the connection between the connecting part and the second electrical connector of the power module that extends along the second direction.

[0023] In some possible implementations, the housing includes a first surface facing the power module, and the main body portion passes through the first surface;

[0024] Along the second direction, the second side of the main body portion is spaced from the edge of the corresponding side of the first surface;

[0025] Along the second direction, the size of the interval is greater than or equal to the size of the connecting portion.

[0026] Since the edges of the second side of the main body and the corresponding side of the first surface are spaced apart along the second direction, and the size of the space is greater than or equal to the size of the connecting part, the connecting part does not need to extend beyond the first surface in the second direction. This helps to reduce the risk of deformation of the connecting part due to collision, and also helps to reduce the space occupied by the bus capacitor.

[0027] In some possible implementations, there are at least three first electrical connectors, and at least three of the first electrical connectors are used to connect correspondingly to at least three second electrical connectors.

[0028] This configuration facilitates the phase-by-phase connection between the bus capacitor and the power module. For example, the three second electrical connectors can be the three-phase terminals of the power module (i.e., the three second electrical connectors are independently connected to the U-phase module, V-phase module, and W-phase module of the power module, respectively), and the three first electrical connectors can be the three-phase terminals of the bus capacitor (i.e., the three first electrical connectors are independently connected to the U-phase capacitor core, V-phase capacitor core, and W-phase capacitor core of the bus capacitor, respectively). The corresponding connection of the three first electrical connectors with the three second electrical connectors enables the independent connection of the U-phase module with the U-phase capacitor core, the V-phase module with the V-phase capacitor core, and the W-phase module with the W-phase capacitor core. This helps to shorten the total length of the current loop between the bus capacitor and the power module. Furthermore, since the length of the current loop is proportional to the magnitude of the parasitic inductance, it helps to reduce the parasitic inductance.

[0029] According to a second aspect of the present disclosure, a motor controller is provided, including a power module and the bus capacitor described above;

[0030] The power module includes a main body and a second electrical connector connected to the main body;

[0031] The second end of the connecting part is connected to the second electrical connector.

[0032] According to a third aspect of the present disclosure, an electric drive system is provided, including the motor controller described above.

[0033] According to a fourth aspect of the present disclosure, a vehicle is provided, including the electric drive system described above, or including the motor controller described above.

[0034] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: the second end of the connecting portion can be connected to the second electrical connector of the power module, so that a current loop is formed between the capacitor core and the power module. Compared with the bus capacitor in the related art where the second end of the connecting portion is located on the side of the main body facing the power module, the second end of the connecting portion of the bus capacitor provided in this disclosure is located on the second side of the main body, that is, the second end of the connecting portion does not extend towards the power module. This means that the current flow between the capacitor core and the power module does not need to pass through the entire parallel part of the connecting portion and the second connector. Therefore, the bus capacitor of this disclosure can be connected in parallel with the second electrical connector through the connecting portion, making the conductive connection between the first electrical connector and the second electrical connector convenient and reliable. It can also reduce the parallel length of the connecting portion and the second electrical connector in the current loop between the capacitor core and the power module, thereby helping to reduce the parasitic inductance in the current loop between the power module and the bus capacitor, and thus helping to reduce the voltage of the power module during switching, reducing the risk of damage to the power module due to overvoltage breakdown.

[0035] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0037] Figure 1 This is a three-dimensional structural schematic diagram of a bus capacitor according to an exemplary embodiment.

[0038] Figure 2 This is a schematic diagram of a partial three-dimensional structure of a motor controller according to an exemplary embodiment.

[0039] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0040] Figure 4 This is a schematic diagram illustrating a connection between a bus capacitor and a power module according to an exemplary embodiment, wherein the current loop between the bus capacitor and the power module is shown by dashed lines.

[0041] Explanation of reference numerals in the attached figures

[0042] 100-Bus capacitor; 10-Capacitor core; 20-First electrical connector; 21-Main body; 213-First side; 214-Second side; 22-Connection part; 221-First mounting hole; 23-First positive connector; 24-First negative connector; 30-Housing shell; 31-First surface; 32-Second surface; 200-Power module; 201-Second electrical connector; 202-Second mounting hole; 203-Second positive connector; 204-Second negative connector; 205-Main body; 1000-Motor controller. Detailed Implementation

[0043] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0044] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally defined according to the upper, lower, top, bottom, first direction, and second direction of the bus capacitor under normal operating conditions (see reference for details). Figure 4 (As shown), it is only for the convenience of describing this disclosure and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or a specific orientation construction and operation, and therefore should not be construed as a limitation of this disclosure. "Inner" and "outer" refer to the inner and outer contours of the corresponding components. In addition, the terms "first," "second," etc., are used to distinguish one element from another and do not have any order or importance.

[0045] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connect," "link," and "install" 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0046] Research has shown that the main reason why power modules in related technologies are prone to damage due to overvoltage breakdown during switching is that, in order to ensure the safe operation of the power module, a bus capacitor is usually connected between the power module and the vehicle's power battery. The bus capacitor ensures the safe operation of the power module through functions such as voltage stabilization, wave absorption, and inductance reduction.

[0047] In the related technology, the copper busbar of the bus capacitor has a main body and a connecting part. The first end of the main body is connected to the capacitor core of the bus capacitor, and the second end of the main body is connected to the first end of the connecting part. The second end of the connecting part extends toward the power module and is connected in parallel with the copper busbar of the power module. That is, the connecting part is located on the side of the main body facing the power module. Therefore, the current flow between the capacitor core and the power module needs to pass through the entire part of the connecting part that is parallel to the copper busbar of the power module, resulting in a long parallel length between the copper busbar of the bus capacitor and the copper busbar of the power module in the current loop between them.

[0048] The magnitude of the parasitic inductance between the two components is directly related to the parallel length of the copper busbars of the two components in the current loop between the two components. Therefore, the current loop between the power module and the bus capacitor in the relevant technology has a large parasitic inductance.

[0049] Because power modules (especially SiC devices with high switching speeds) generate rapid current changes (di / dt) during switching, if there is a large parasitic inductance (L) in the current loop between the power module and the bus capacitor, the voltage (V=L·di / dt) will be too high when the power module is switching, which will cause the power module to be damaged due to overvoltage breakdown.

[0050] As can be understood, a current loop refers to a closed path through which current flows from one component (such as a bus capacitor), passes through another component (such as a power module), and returns, as described in this disclosure. Figure 4 The path shown by the dashed line in the illustrated implementation is as follows.

[0051] In view of this, such as Figures 1 to 4 As shown, according to a first aspect of the present disclosure, a bus capacitor 100 is provided, including a capacitor core 10 and a first electrical connector 20. The first electrical connector 20 includes a main body portion 21 and a connecting portion 22. A first end of the main body portion 21 is connected to the capacitor core 10, and a second end of the main body portion 21 is connected to a first end of the connecting portion 22. The second end of the connecting portion 22 is used to connect to a second electrical connector 201 of a power module 200. The second electrical connector 201 is located on a first side 213 of the main body portion 21, wherein the second end of the connecting portion 22 is located on a second side 214 of the main body portion 21, and the second side 214 and the first side 213 are different sides of the main body portion 21.

[0052] Through the above technical solution, the second end of the connecting part 22 can be connected to the second electrical connector 201 of the power module 200, so that a current loop is formed between the capacitor core 10 and the power module 200. Compared to the bus capacitors in related technologies where the second end of the connection portion is located on the side of the main body facing the power module, the second end of the connection portion 22 of the bus capacitor 100 provided in this disclosure is located on the second side 214 of the main body 21. That is, the second end of the connection portion 22 does not extend towards the power module 200, so that the current flow between the capacitor core 10 and the power module 200 does not need to pass through the entire part of the connection portion 22 parallel to the second connector. Therefore, the bus capacitor 100 of this disclosure can be connected to the second electrical connector 201 in parallel through the connection portion 22, making the conductive connection between the first electrical connector 20 and the second electrical connector 201 convenient and reliable. It can also reduce the parallel length of the connection portion 22 and the second electrical connector 201 in the current loop between the capacitor core 10 and the power module 200, thereby helping to reduce the parasitic inductance in the current loop between the power module 200 and the bus capacitor 100, and further helping to reduce the voltage of the power module 200 during switching, reducing the risk of damage to the power module 200 due to overvoltage breakdown.

[0053] Furthermore, compared with the parallel length of the copper busbars of the conventional bus capacitor and power module in the current loop, the parallel length of the first electrical connector 20 and the second electrical connector 201 in the current loop of this disclosure can be reduced by about 10mm, thereby significantly reducing the parasitic inductance in the current loop between the bus capacitor 100 and the power module 200.

[0054] To verify the effect of the bus capacitor 100 in reducing parasitic inductance, parasitic inductance simulation was performed. In the embodiment where there are three first electrical connectors 20, and the three first electrical connectors 20 are the (U, V, W) three-phase terminals of the bus capacitor 100, the parasitic inductance of the three-phase current loop between the bus capacitor and the power module 200 was measured to be 9.78nH, 9.96nH, and 11.01nH, respectively, with an average parasitic inductance of 10.25nH. This is about 4.71nH lower than the parasitic inductance of the current loop between the conventional bus capacitor and the power module.

[0055] In addition, a dual-pulse comparative test was conducted on the SiC power module using a conventional bus capacitor and the SiC power module using the bus capacitor 100 disclosed herein. Under the same driving parameters, the peak voltage can differ by about 50V. At an ambient temperature of -40℃, a bus voltage of 485V, and Ic=830A, the peak voltage (Vdsmax) of the SiC power module using the conventional bus capacitor was approximately 802.7V. However, the peak voltage (Vdsmax) of the SiC power module using the bus capacitor 100 disclosed herein was only 756.2V. This shows that using the bus capacitor 100 disclosed herein can effectively reduce the voltage of the power module 200 during switching, which greatly helps the safe and reliable application of the power module. Furthermore, due to the reduction in peak voltage, the switching losses will also be reduced accordingly. Under the above operating conditions, the loss reduction is approximately 5.25mJ, which will have a beneficial impact on the overall vehicle range.

[0056] It is understood that the first electrical connector 20 and the second electrical connector 201 can be copper busbars or electrical connectors made of other materials, such as aluminum busbars, and this disclosure does not limit them.

[0057] In some possible implementations, such as Figure 4 As shown, the second side 214 is located on the side opposite to the first side 213. For example, the second side 214 and the first side 213 may be located on opposite sides of the main body 21 in the second direction.

[0058] With this design, the space on the adjacent side of the first side 213 of the main body 21 will not be occupied by the connecting part 22, which is conducive to expanding the arrangement space on the adjacent side of the first side 213 of the main body 21. For example, when the first electrical connector 20 includes the first positive connector 23 and the first negative connector 24, it is convenient for the first positive connector 23 and the first negative connector 24 to be arranged adjacently. For example, when there are at least three first electrical connectors 20, it is convenient for at least three first electrical connectors 20 to be arranged adjacently side by side.

[0059] In other embodiments of this disclosure, the second side 214 may also be located on the side adjacent to the first side 213.

[0060] This disclosure does not limit the extending directions of the main body 21 and the connecting part 22. As one embodiment, such as Figures 1 to 4 As shown, the main body 21 extends along a first direction, and the connecting part 22 extends from the second end of the main body 21 toward the second side 214 along a second direction, with the first direction perpendicular to the second direction.

[0061] This configuration allows the connecting part 22 to have sufficient connection length to connect with the second electrical connector 201, and prevents the bus capacitor 100 from being too large in the first direction, thereby reducing the space occupied by the bus capacitor 100 and further facilitating the miniaturization of the motor controller 1000.

[0062] In other embodiments of this disclosure, the main body 21 extends along a first direction, and the connecting portion 22 can extend from the second end of the main body 21 along a direction that forms an angle with the second direction.

[0063] In this disclosure, when the bus capacitor 100 is installed in a vehicle, the first direction can be the vertical direction (such as the height direction of the vehicle), and the second direction can be the horizontal direction (such as the length or width direction of the vehicle).

[0064] This disclosure does not limit the connection form between the connecting part 22 and the second electrical connector 201. As one embodiment, such as Figure 3 and Figure 4 As shown, the connecting part 22 is used to be attached and connected to the second electrical connector 201.

[0065] The connection part 22 is attached to the second electrical connector 201, which helps to increase the number of conductive contact points between the two. Even if the connection between the connection part 22 and the second electrical connector 201 is unstable, they can still maintain conductivity, which helps to improve the reliability of the electrical connection between the bus capacitor 100 and the power module 200.

[0066] In other embodiments of this disclosure, the connecting portion 22 may also be connected to the second electrical connector 201 via multiple endpoints.

[0067] This disclosure does not limit the method of achieving a close fit between the connecting portion 22 and the second connecting member. As one embodiment, such as... Figure 1 and Figure 4 As shown, the connecting part 22 is provided with a first mounting hole 221, which is used to connect with the second mounting hole 202 on the second electrical connector 201. That is, the first mounting hole 221 and the second mounting hole 202 can be passed through by fasteners. By tightening the fasteners, the connecting part 22 and the second electrical connector 201 can be fitted and connected.

[0068] This method enables the connecting part 22 to be closely connected to the second connecting member, which is easy to operate, ensures the connection quality, and allows the connecting part 22 to be separated from the second connecting member, thereby facilitating the individual maintenance or replacement of the bus capacitor 100 or the power module 200.

[0069] In another embodiment of this disclosure, the connecting portion 22 is provided with a first welding area, and the second connector is provided with a second welding area, wherein the first welding area can be welded to the second welding area.

[0070] In some possible implementations, such as Figure 1 and Figure 4 As shown, the bus capacitor 100 also includes a housing 30, the capacitor core 10 is located inside the housing 30, the first end of the main body 21 is located inside the housing 30, and the second end of the main body 21 is located outside the housing 30.

[0071] The housing 30 can isolate the capacitor core 10 from the outside, thus protecting the capacitor core 10 from damage and preventing insulation failure between the capacitor core 10 and other components.

[0072] In some possible implementations, such as Figure 4 As shown, the housing 30 is adapted to be stacked with the power module 200 along a first direction, the main body 21 extends along the first direction, and the connecting part 22 extends along a second direction perpendicular to the first direction.

[0073] The housing 30 and the power module 200 are stacked along the first direction, which helps to reduce the space occupied by the bus capacitor 100 and the power module 200 as a whole, thereby helping to reduce the overall size of the motor controller 1000 and thus helping to improve the power density of the electric drive system.

[0074] Furthermore, the main body 21 extends along the first direction, and the connecting part 22 extends along the second direction perpendicular to the first direction, which facilitates the connection part 22 to be attached and connected to the second electrical connector 201 of the power module 200 that extends along the second direction.

[0075] In some possible implementations, such as Figure 1 and Figure 4 As shown, the housing 30 includes a first surface 31 facing the power module 200, and a main body portion 21 passes through the first surface 31. Along the second direction, the second side 214 of the main body portion 21 is spaced from the edge of the corresponding side of the first surface 31. Along the second direction, the size of the space is greater than or equal to the size of the connecting portion 22.

[0076] Since the edges of the second side 214 of the main body 21 and the corresponding side of the first surface 31 are spaced apart along the second direction, and the size of the space is greater than or equal to the size of the connecting part 22, the connecting member does not need to extend out of the first surface 31 in the second direction, which helps to reduce the risk of deformation of the connecting member due to collision, and also helps to reduce the space occupied by the bus capacitor 100.

[0077] In some possible implementations, such as Figure 1 and Figure 4 As shown, the housing 30 also includes a second surface 32, which is adjacent to the first surface 31. The electrical connector connecting the capacitor core 10 to the power battery is located on the second surface 32.

[0078] In some possible implementations, such as Figure 1 and Figure 3 As shown, the first electrical connector 20 includes a first positive connector 23 and a first negative connector 24. The first positive connector 23 is used to connect with the second positive connector 203 of the second electrical connector 201, and the first negative connector 24 is used to connect with the second negative connector 204 of the second electrical connector 201.

[0079] This connection facilitates the formation of a current loop between the bus capacitor 100 and the power module 200, that is, the formation of a current that flows from the capacitor core 10 through the first positive terminal connector 23 and the second positive terminal connector to the power module 200, and the formation of a current that flows from the power module 200 through the second positive terminal connector 203 and the first positive terminal connector to the capacitor core 10.

[0080] In some possible implementations, such as Figure 1 and Figure 2 As shown, there are at least three first electrical connectors 20, and at least three first electrical connectors 20 are used to connect to at least three second electrical connectors 201.

[0081] This configuration facilitates the phase-by-phase connection between the bus capacitor 100 and the power module 200. For example, the three second electrical connectors 201 can be connected to the three-phase terminals of the power module 200 (i.e., the three second electrical connectors 201 are independently connected to the U-phase module, V-phase module, and W-phase module of the power module 200, respectively), and the three first electrical connectors 20 can be connected to the three-phase terminals of the bus capacitor 100 (i.e., the three first electrical connectors 20 are connected to the U-phase capacitor core 10, V-phase capacitor core 10, and W-phase capacitor core 10 of the bus capacitor 100, respectively). (And the W-phase capacitor core 10 is independently connected), the three first electrical connectors 20 and the three second electrical connectors 201 are connected accordingly, which can realize the independent connection between the U-phase module and the U-phase capacitor core 10, the independent connection between the V-phase module and the V-phase capacitor core 10, and the independent connection between the W-phase module and the W-phase capacitor core 10. This is beneficial to shorten the total length of the current loop between the bus capacitor 100 and the power module 200. Furthermore, since the length of the current loop is proportional to the size of the parasitic inductance, it is beneficial to reduce the parasitic inductance.

[0082] According to a second aspect of the present disclosure, a motor controller 1000 is provided, including a power module 200 and a bus capacitor 100 as described above. The power module 200 includes a main body 205 and a second electrical connector 201 connected to the main body 205. The second end of the connecting portion 22 is connected to the second electrical connector 201.

[0083] The motor controller 1000 disclosed herein may further include a filter assembly, a drive circuit board, and a control circuit board.

[0084] According to a third aspect of the present disclosure, an electric drive system is provided, including the motor controller 1000 described above.

[0085] The electric drive system disclosed herein may also include a drive motor and a reducer.

[0086] According to a fourth aspect of the present disclosure, a vehicle is provided, including the electric drive system described above, or including the motor controller 1000 described above.

[0087] The vehicle disclosed herein may also include a body, with the motor controller 1000 and electric drive system mounted on the body.

[0088] It should be noted that the motor controller 1000 disclosed herein can be applied not only to vehicles, but also to industrial products such as energy storage inverters and photovoltaic inverters, as well as high-voltage industrial technologies.

[0089] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0090] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0091] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A bus capacitor, characterized in that, Includes the capacitor core and the first electrical connector; The first electrical connector includes a main body and a connecting part. A first end of the main body is connected to the capacitor core, and a second end of the main body is connected to the first end of the connecting part. The second end of the connecting part is used to connect to a second electrical connector of the power module. The second electrical connector is located on the first side of the main body. The second end of the connecting portion is located on the second side of the main body portion, and the second side and the first side are different sides of the main body portion.

2. The bus capacitor according to claim 1, characterized in that, The second side is located on the side opposite to the first side.

3. The bus capacitor according to claim 1, characterized in that, The main body extends along a first direction, and the connecting portion extends from the second end of the main body along a second direction toward the second side, wherein the first direction is perpendicular to the second direction.

4. The bus capacitor according to claim 1, characterized in that, The connecting part is used to fit and connect with the second electrical connector.

5. The bus capacitor according to claim 4, characterized in that, The connecting part is provided with a first mounting hole, which is used to connect with a second mounting hole on the second electrical connector.

6. A bus capacitor according to any one of claims 1-5, characterized in that, The bus capacitor also includes a housing; The capacitor core is located inside the housing; The first end of the main body is located inside the housing, and the second end of the main body is located outside the housing.

7. The bus capacitor according to claim 6, characterized in that, The housing is adapted to be stacked with the power module along a first direction, the main body extends along the first direction, and the connecting portion extends along a second direction perpendicular to the first direction.

8. The bus capacitor according to claim 7, characterized in that, The housing includes a first surface facing the power module, and the main body portion passes through the first surface; Along the second direction, the second side of the main body portion is spaced from the edge of the corresponding side of the first surface; Along the second direction, the size of the interval is greater than or equal to the size of the connecting portion.

9. The bus capacitor according to any one of claims 1-5, characterized in that, The first electrical connector is at least three, and the at least three first electrical connectors are used to connect to the at least three second electrical connectors.

10. A motor controller, characterized in that, Includes a power module and a bus capacitor according to any one of claims 1-9; The power module includes a main body and a second electrical connector connected to the main body; The second end of the connecting part is connected to the second electrical connector.

11. An electric drive system, characterized in that, Includes the motor controller according to claim 10.

12. A vehicle, characterized in that, It includes the electric drive system according to claim 11, or the motor controller according to claim 10.

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