Controller and vehicle
By connecting the first terminal of the capacitor to the terminals of the power module in the controller, the problem of voltage overshoot caused by excessive stray inductance is solved, achieving efficient current path and reducing production costs.
Patent Information
- Application Number
- CN202511781234.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-03-17
AI Technical Summary
The existing connection method between capacitors and power modules is unreasonable, resulting in excessive stray inductance, causing voltage overshoot, affecting the safety of power modules, reducing system efficiency and increasing production costs.
By arranging multiple first terminals of the capacitor at intervals along a first direction and in parallel, and stacking them with multiple second terminals of the power module, the current path is shortened, the positive and negative current loops are tightly fitted, and stray inductance is reduced.
It significantly reduces the risk of voltage overshoot, improves the overall efficiency of the controller, and reduces production costs and complexity, without requiring a reduction in switching speed or the addition of buffer circuitry.
Smart Images
Figure CN121689735A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of controllers, in particular to a controller and a vehicle. BACKGROUND
[0002] In the related art, in the motor controller, the capacitor is used to absorb the voltage ripple of the DC side, and provides stable DC voltage support for the power module. However, the structure of the existing capacitor and the connection mode of the capacitor and the power module are unreasonable, which leads to too large stray inductance, and under high switching frequency and high current change rate, it will cause serious voltage overshoot problem, which is difficult to guarantee the safety of the power module. In order to suppress voltage overshoot, engineers have to reduce switching speed or increase buffer circuit, which will limit the system efficiency, and at the same time, increase production cost and complexity. SUMMARY
[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to propose a controller, which has a reasonable structure and can reduce stray inductance and the risk of voltage overshoot.
[0004] The present application further proposes a vehicle.
[0005] According to the controller of the present application, the capacitor includes a plurality of first terminals, the plurality of first terminals are arranged in parallel along a first direction, and the plurality of first terminals include a plurality of first sub-terminals and a plurality of second sub-terminals, at least one first sub-terminal is arranged between adjacent two second sub-terminals, and the first direction is perpendicular to the thickness direction of the first terminal; the power module includes a plurality of second terminals, the number of the second terminals is the same as that of the first terminals and each second terminal corresponds to a first terminal, and the second terminal is stacked and connected with the corresponding first terminal along the thickness direction of the first terminal.
[0006] According to the controller of the present application, by arranging the plurality of first terminals in parallel along the first direction and stacking and connecting the second terminal with the corresponding first terminal, the current path can be significantly shortened, the positive and negative current loops can be closely fitted, and the loop area can be significantly reduced, thereby the stray inductance can be significantly reduced, the risk of voltage overshoot can be reduced, and the switching speed does not need to be reduced or the buffer circuit does not need to be increased, thereby the overall efficiency of the controller can be improved, and the production cost and complexity of the controller can be reduced.
[0007] In some examples of the present application, along the first direction, one or two first sub-terminals are arranged between adjacent two second sub-terminals.
[0008] In some examples of the present application, one of the first sub-terminal and the second sub-terminal is configured as a positive electrode terminal, and the other of the first sub-terminal and the second sub-terminal is configured as a negative electrode terminal.
[0009] In some examples of the present application, the side surface of the first terminal facing the corresponding second terminal and the side surface of the second terminal facing the corresponding first terminal are both configured as a plane.
[0010] In some examples of the present application, the controller further comprises a housing defining a receiving space, the capacitor and the power module are both received in the receiving space, and the capacitor is attached to the housing.
[0011] In some examples of the present application, the controller further comprises a mounting seat received in the receiving space, the mounting seat is formed with a plurality of protrusions, the first sub-terminal is formed with a plurality of notches, the plurality of notches and the plurality of protrusions are the same in number and one-to-one corresponding, and at least part of the protrusions are arranged in the corresponding notches.
[0012] In some examples of the present application, both ends of the first sub-terminal are formed with the notches along the first direction.
[0013] In some examples of the present application, the controller further comprises an insulating medium layer, and the insulating medium layer is arranged between any two adjacent first terminals along the first direction.
[0014] In some examples of the present application, the insulating medium layer is configured as a thermally conductive insulating medium layer.
[0015] The vehicle according to the present application comprises the above-mentioned controller.
[0016] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS
[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings. Figure 1 is a structural schematic diagram of the controller according to an example of the present application; Figure 2 is Figure 1 is an enlarged schematic diagram of A in FIG.
[0018] REFERENCE NUMERALS: controller 100; capacitor 1; first terminal 11; first sub-terminal 111; notch 1111; second sub-terminal 112; Housing 2; Mounting seat 3; protrusion 31; Insulating dielectric layer 4. DETAILED DESCRIPTION
[0019] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.
[0020] Reference is made below to Figure 1 and Figure 2 Controller 100 and vehicle according to embodiments of the present application.
[0021] As Figure 1 shown, controller 100 according to embodiments of the present application comprises: a capacitor 1, a power module, the capacitor 1 comprises a plurality of first terminals 11, the plurality of first terminals 11 are arranged in parallel and spaced apart along a first direction (i.e. X direction as shown), the plurality of first terminals 11 comprises: a plurality of first sub-terminals 111, a plurality of second sub-terminals 112, at least one first sub-terminal 111 is arranged between any two adjacent second sub-terminals 112, the first direction (i.e. X direction as shown) is perpendicular to the thickness direction of the first terminal 11; the power module comprises a plurality of second terminals, the number of the second terminals is the same as the number of the first terminals 11 and one-to-one correspondence, along the thickness direction of the first terminal 11, the second terminal is stacked and connected with the corresponding first terminal 11. Figure 1 Figure 1 As
[0022] As Figure 1 shown, the capacitor 1 comprises a plurality of first terminals 11, the plurality of first terminals 11 are arranged in parallel and spaced apart along a first direction (i.e. X direction as shown), as some embodiments of the present application, the number of the first terminals 11 can be but not limited to eight, nine, ten, etc. As Figure 1 shown, the capacitor 1 comprises ten first terminals 11, the ten first terminals 11 are arranged in parallel and spaced apart along a first direction (i.e. X direction as shown). Figure 1
[0023] As some embodiments of the present application, the plurality of first sub-terminals 111, the plurality of second sub-terminals 112 are arranged along the first direction (i.e. X direction as shown). Figure 1 The first sub-terminal 111 and the second sub-terminal 112 are arranged in parallel and spaced apart along the first direction (i.e., the X direction shown in the figure). As some embodiments of the present application, the number of the first sub-terminal 111 and the second sub-terminal 112 can be the same or different. For example, the capacitor 1 includes ten first terminals 11, including five first sub-terminals 111 and five second sub-terminals 112, or six first sub-terminals 111 and four second sub-terminals 112, or four first sub-terminals 111 and six second sub-terminals 112.
[0024] At least one first sub-terminal 111 is arranged between any two adjacent second sub-terminals 112. As some embodiments of the present application, one first sub-terminal 111 is arranged between any two adjacent second sub-terminals 112, or a plurality of first sub-terminals 111 are arranged between any two adjacent second sub-terminals 112, for example, two first sub-terminals 111 are arranged between any two adjacent second sub-terminals 112.
[0025] The first direction (i.e., the X direction shown in the figure) is perpendicular to the thickness direction of the first terminal 11. Figure 1
[0026] The power module includes a plurality of second terminals. As some embodiments of the present application, the number of the second terminals can be, but is not limited to, eight, nine, ten, etc. The number of the second terminals is the same as and corresponds to the number of the first terminals 11.
[0027] Along the thickness direction of the first terminal 11, the second terminal is stacked and connected with the corresponding first terminal 11. As some embodiments of the present application, the first terminal 11 is stacked on and connected with the corresponding second terminal. As some embodiments of the present application, the first terminal 11 and the second terminal can be connected by means of a bolt or laser welding, or the first terminal 11 and the corresponding second terminal can be connected by other components (such as an insulating sleeve), for example, the first terminal 11 is formed with a mounting hole, and the insulating sleeve is arranged in the mounting hole and connected with the second terminal.
[0028] It should be noted that, by arranging a plurality of first terminals 11 in parallel and spaced apart along the first direction (i.e., the X direction shown in the figure), and stacking and connecting the second terminal with the corresponding first terminal 11 along the thickness direction of the first terminal 11, the current path can be significantly shortened, the positive and negative current loops can be closely fitted, the loop area can be significantly reduced, the magnetic field generated by the current reverse can be offset, thereby reducing the stray inductance, further, the voltage can be controlled at a lower level under the condition of high switching frequency and high current change rate, thereby ensuring the safety of the power module, in addition, without reducing the switching speed or increasing the buffer circuit, the switching loss can be reduced and the overall efficiency of the controller 100 can be improved, at the same time, the structure of the controller 100 can be simplified, and the production cost and complexity of the controller 100 can be reduced. Figure 1
[0029] Thus, by causing the plurality of first terminals 11 to move along the first direction (i.e. Figure 1 The terminals (as shown in the X direction) are spaced apart and arranged in parallel. The second terminal is stacked and connected to the corresponding first terminal 11. This can significantly shorten the current path, make the positive and negative current loops fit together tightly, and significantly reduce the loop area. This can significantly reduce stray inductance and reduce the risk of voltage overshoot. In addition, there is no need to reduce the switching speed or add a buffer circuit, which can improve the overall efficiency of the controller 100 and reduce the production cost and complexity of the controller 100.
[0030] In some embodiments of the present invention, such as Figure 1 As shown, along the first direction (i.e. Figure 1 (in the X direction shown), there is one or two first sub-terminals 111 between two adjacent second sub-terminals 112.
[0031] As some embodiments of this application, along the first direction (i.e. Figure 1 (As shown in the X direction), a first sub-terminal 111 is provided between two adjacent second sub-terminals 112. This allows the first sub-terminals 111 and the second sub-terminals 112 to be arranged neatly, which is convenient for production and assembly.
[0032] As some embodiments of this application, along the first direction (i.e. Figure 1 (As shown in the X direction), two first sub-terminals 111 are provided between two adjacent second sub-terminals 112. This can adapt to the layout of the power module and facilitate the assembly of capacitor 1 and power module.
[0033] This arrangement makes the first sub-terminal 111 and the second sub-terminal 112 reasonably arranged, which is convenient for arranging the first sub-terminal 111 and the second sub-terminal 112 according to space requirements and power modules.
[0034] In some embodiments of the present invention, one of the first sub-terminal 111 and the second sub-terminal 112 is configured as a positive terminal, and the other of the first sub-terminal 111 and the second sub-terminal 112 is configured as a negative terminal.
[0035] As some embodiments of this application, the first sub-terminal 111 is constructed as a positive terminal, the second sub-terminal 112 is constructed as a negative terminal, and one or two positive terminals are provided between two adjacent negative terminals.
[0036] As some embodiments of this application, the second sub-terminal 112 is configured as a positive terminal, and the first sub-terminal 111 is configured as a negative terminal, with one or two negative terminals between adjacent positive terminals. This arrangement allows for selection of the positions of the positive and negative terminals according to actual needs, facilitating production.
[0037] In some embodiments of the present invention, the side surface of the first terminal 11 facing the corresponding second terminal and the side surface of the second terminal facing the corresponding first terminal 11 are both constructed as planes and are adapted to each other.
[0038] This configuration increases the contact area between the first terminal 11 and the second terminal, and ensures good contact between them, reducing the risk of failure.
[0039] In some embodiments of the present invention, such as Figure 1 As shown, the controller 100 also includes a housing 2, which defines a receiving space, in which the capacitor 1 and the power module are both received, and the capacitor 1 is attached to the housing 2.
[0040] As some embodiments of this application, along the thickness direction of the first terminal 11, one end of the capacitor 1 is attached to the housing 2, and the other end of the capacitor 1 is connected to the power module.
[0041] By defining a receiving space within the housing 2, both capacitor 1 and the power module are housed within this space. This protects capacitor 1 and the power module, reducing the impact of external factors on capacitor 1 and the power module during the operation of the controller 100, and improving the reliability of the controller 100. Furthermore, by attaching capacitor 1 to housing 2, the heat generated by the power module during operation can be transferred to housing 2 through capacitor 1. Housing 2 then acts as an auxiliary heat sink, working together with the bottom heat sink of the controller 100 to dissipate heat, thus improving heat dissipation efficiency and significantly reducing the operating temperature of the power module and capacitor 1. This extends the service life of the power module and capacitor 1, further enhancing the reliability of the controller 100.
[0042] In some embodiments of the present invention, such as Figure 2 and Figure 2 As shown, the controller 100 also includes: a mounting base 3, which is housed in a receiving space. The mounting base 3 has a plurality of protrusions 31, and the first sub-terminal 111 has a plurality of notches 1111. The plurality of notches 1111 and the plurality of protrusions 31 are the same in number and correspond one-to-one. At least a portion of the protrusions 31 is disposed in the corresponding notches 1111.
[0043] In some embodiments of this application, the mounting base 3 may be disposed on the housing 2. For example, the mounting base 3 may be connected to the housing 2 by bolts.
[0044] As some embodiments of this application, the first sub-terminal 111 may have two notches 1111 and correspond to two protrusions 31 on the mounting base 3 respectively.
[0045] As some embodiments of this application, the first sub-terminal 111 may be formed with three notches 1111, which correspond to the three protrusions 31 on the mounting base 3 respectively.
[0046] At least a portion of the protrusion 31 is disposed within the corresponding notch 1111. As some embodiments of this application, at least a portion of the protrusion 31 is adapted to the notch 1111 so that at least a portion of the protrusion 31 is disposed within the corresponding notch 1111.
[0047] This configuration allows for positioning during the installation of the first sub-terminal 111, reducing the installation difficulty and improving installation efficiency. It also restricts the position of the first sub-terminal 111 on the mounting base 3, reducing the risk of controller 100 failure due to displacement of the first sub-terminal 111 during operation and improving the reliability of controller 100.
[0048] In some embodiments of the present invention, such as Figure 1 As shown, along the first direction (i.e. Figure 1 (As shown in the X direction), both ends of the first sub-terminal 111 have notches 1111.
[0049] As some embodiments of this application, the mounting base 3 has two protrusions 31 formed at positions corresponding to the first sub-terminal 111, which are adapted to the notches 1111 at both ends of the first sub-terminal 111. At least a portion of the two protrusions 31 is respectively disposed in the corresponding two notches 1111.
[0050] This configuration allows for operation along the first direction (i.e.) Figure 1 The position of the first sub-terminal 111 is restricted in the X direction (as shown), which further reduces the risk of controller 100 failure due to displacement of the first sub-terminal 111 during operation and improves the reliability of controller 100.
[0051] In some embodiments of the present invention, such as Figure 2 and Figure 1 As shown, the controller 100 further includes: an insulating dielectric layer 4, along the first direction (i.e., Figure 1 (As shown in the X direction), an insulating dielectric layer 4 is provided between any two adjacent first terminals 11.
[0052] This configuration can insulate any two adjacent first terminals 11, reducing short circuits or leakage caused by potential differences between adjacent first terminals 11, thus ensuring independent transmission of signals or current.
[0053] In some embodiments of the present invention, the insulating dielectric layer 4 is configured as a thermally conductive insulating dielectric layer 4.
[0054] As some embodiments of this application, the thermally conductive insulating dielectric layer 4 can be made of a high thermal conductivity insulating material, such as a thermally conductive silicone pad with a certain thickness and elasticity, which can provide reliable electrical insulation and fill microscopic uneven interfaces to reduce contact thermal resistance. Alternatively, it can be a polymer film filled with ceramic particles such as aluminum nitride (AlN), boron nitride (BN), and alumina (Al2O3) in a polyimide (PI) or epoxy resin matrix. The material of the insulating dielectric layer 4 can be selected according to actual needs and production economy.
[0055] This configuration allows the heat generated during the operation of the controller 100 to be quickly dissipated through the insulating dielectric layer 4, which facilitates the transfer of heat to the housing 2 through the capacitor 1, thereby improving heat dissipation efficiency, reducing the operating temperature of the power module and the capacitor 1, extending the service life of the power module and the capacitor 1, and improving the reliability of the controller 100.
[0056] According to an embodiment of the vehicle, by causing a plurality of first terminals 11 along a first direction (i.e. The terminals (as shown in the X direction) are spaced apart and arranged in parallel. The second terminal is stacked and connected to the corresponding first terminal 11. This can significantly shorten the current path, make the positive and negative current loops fit together tightly, and significantly reduce the loop area. This can significantly reduce stray inductance and reduce the risk of voltage overshoot. In addition, there is no need to reduce the switching speed or add a buffer circuit, which can improve the overall efficiency of the controller 100 and reduce the production cost and complexity of the controller 100.
[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0058] In the description of this invention, "first feature" and "second feature" may include one or more of the features.
[0059] In the description of this invention, "a plurality of" means two or more.
[0060] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.
[0061] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.
[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0063] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A controller characterized by comprising: The capacitor comprises a plurality of first terminals, the plurality of first terminals are arranged in parallel and spaced apart along a first direction, the plurality of first terminals comprise a plurality of first sub-terminals and a plurality of second sub-terminals, at least one first sub-terminal is arranged between any two adjacent second sub-terminals, and the first direction is perpendicular to the thickness direction of the first terminals. The power module comprises a plurality of second terminals, the number of the second terminals is the same as that of the first terminals, and each second terminal corresponds to a first terminal, the second terminal and the corresponding first terminal are stacked and connected along the thickness direction of the first terminal. Along the first direction, one or two first sub-terminals are arranged between any two adjacent second sub-terminals.
2. The controller of claim 1, wherein, One of the first sub-terminals and the second sub-terminals is configured as a positive electrode terminal, and the other of the first sub-terminals and the second sub-terminals is configured as a negative electrode terminal.
3. The controller of claim 1, wherein, The side surface of the first terminal facing the corresponding second terminal and the side surface of the second terminal facing the corresponding first terminal are both configured as a plane.
4. The controller of claim 1, wherein, The capacitor further comprises:
5. The controller of claim 1, wherein, A housing defining a receiving space, the capacitor and the power module are received in the receiving space, and the capacitor is attached to the housing. The capacitor further comprises:
6. The controller of claim 5, wherein, A mounting seat received in the receiving space, the mounting seat is formed with a plurality of protrusions, the first sub-terminals are formed with a plurality of notches, the number of the notches is the same as that of the protrusions, and each notch corresponds to a protrusion, and at least part of the protrusions is arranged in the corresponding notch. Along the first direction, both ends of the first sub-terminal are formed with the notches.
7. The controller of claim 6, wherein, The capacitor further comprises:
8. The controller of claim 1, wherein, An insulating medium layer arranged between any two adjacent first terminals along the first direction. The insulating medium layer is configured as a thermally conductive insulating medium layer.
9. The controller of claim 8, wherein, The controller comprises any one of the controllers according to claims 1-9.
10. A vehicle characterized by comprising: