Multi-stage high-voltage filter devices, electric drive controllers, and hybrid vehicles

Abstract

This application relates to the field of power electronics technology and discloses a multi-stage high-voltage filter device, an electric drive controller, and a hybrid vehicle. The multi-stage high-voltage filter device includes a first filter module, a second filter module, and a third filter module. These three modules are independently packaged and detachably connected. The input terminal of the first filter module is connected to a power switch module, and the first filter module includes a first X capacitor unit and a first Y capacitor unit. The input terminal of the second filter module is connected to the output terminal of the first filter module, and the second filter module includes a first common-mode inductor unit, a second common-mode inductor unit, and a second Y capacitor unit. The input terminal of the third filter module is connected to the output terminal of the second filter module, and the output terminal of the third filter module is connected to a power supply module. This application achieves independent disassembly and flexible configuration at the module level while ensuring filtering performance.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, and in particular to a multi-stage high-voltage filter device, an electric drive controller, and a hybrid vehicle. Background Technology

[0002] The electric drive controller of new energy hybrid vehicles is powered by a high-voltage battery. The DC power output from the battery needs to be inverted by power switching devices within the controller before it can drive the motor. However, the rapid switching of these power switching devices generates strong electromagnetic interference (EMI), with conducted emissions in the 150kHz to 108MHz frequency band often exceeding the limits set by the vehicle's electromagnetic compatibility standards. To suppress this interference, a filter device must be installed between the high-voltage battery and the power switching devices.

[0003] However, the relevant technologies generally suffer from fixed filter device structures and inconvenient maintenance, making it difficult to improve maintenance convenience while ensuring filtering effect. Utility Model Content

[0004] This application provides a multi-stage high-voltage filter device, an electric drive controller, and a hybrid vehicle, which solves the technical problems of fixed structure and inconvenient maintenance of current filter devices, and achieves the technical effect of independent disassembly and assembly and flexible configuration at the module level while ensuring filter performance.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include: In a first aspect, embodiments of this application provide a multi-stage high-voltage filter device, which is connected between a power supply module and a power switch module. The multi-stage high-voltage filter device includes a first filter module, a second filter module, and a third filter module. The first filter module, the second filter module, and the third filter module are independently packaged and detachably connected to each other. The input terminal of the first filtering module is connected to the power switching module, and the first filtering module includes a first X capacitor unit and a first Y capacitor unit, so as to use the first X capacitor unit and the first Y capacitor unit to filter the common-mode noise and differential-mode noise generated by the power switching module. The input terminal of the second filtering module is connected to the output terminal of the first filtering module, and the second filtering module includes a first common-mode inductor unit, a second common-mode inductor unit, and a second Y capacitor unit, so as to use the first common-mode inductor unit, the second common-mode inductor unit, and the second Y capacitor unit to perform secondary filtering on the common-mode noise; The input terminal of the third filtering module is connected to the output terminal of the second filtering module, and the output terminal of the third filtering module is connected to the power supply module. The third filtering module includes a second X capacitor unit to perform secondary filtering on the differential mode noise using the second X capacitor unit.

[0006] The multi-stage high-voltage filtering device proposed in this application utilizes independently packaged multi-stage filtering modules connected in series in a detachable manner. This allows for individual replacement of any failed filtering module without requiring overall disassembly, significantly reducing maintenance difficulty and cost. Furthermore, the multi-stage filtering modules each handle filtering tasks for different noise types and frequency bands, ensuring the performance of the complete filtering link from the power switching module to the power supply module. Specific modules can be flexibly replaced or upgraded according to actual electromagnetic compatibility requirements, balancing structural compactness and configuration flexibility.

[0007] Optionally, the first X capacitor unit includes a first X capacitor, wherein a first end of the first X capacitor is connected to the positive line of the multi-stage high-voltage filter device, and a second end of the first X capacitor is connected to the negative line of the multi-stage high-voltage filter device.

[0008] Optionally, the first Y capacitor unit includes a first Y capacitor and a second Y capacitor, wherein the first terminal of the first Y capacitor is connected to the positive line of the multi-stage high-voltage filter device, and the second terminal of the first Y capacitor is grounded; the first terminal of the second Y capacitor is connected to the negative line of the multi-stage high-voltage filter device, and the second terminal of the second Y capacitor is grounded.

[0009] This application, by simultaneously setting an X capacitor connected between the positive and negative lines and two Y capacitors connected to ground respectively in the first filtering module, utilizes the synergistic operation of the Y and X capacitors to significantly attenuate differential-mode interference and common-mode interference at the initial stage of noise entering the filtering device, thereby significantly reducing the filtering burden of subsequent filtering modules.

[0010] Optionally, the first common-mode inductor unit includes a first magnetic ring, through which the positive and negative lines of the multi-stage high-voltage filter device pass; wherein the first magnetic ring is a nanocrystalline magnetic ring.

[0011] Optionally, the second common-mode inductor unit includes a second magnetic ring, through which the positive and negative lines of the multi-stage high-voltage filter pass; wherein the second magnetic ring is a ferrite magnetic ring.

[0012] By sequentially placing nanocrystalline and ferrite magnetic rings within the same module along the signal direction, and ensuring that both positive and negative lines pass through both, a wide-band common-mode noise suppression effect is guaranteed. Furthermore, integrating the two magnetic rings into a detachable module allows the common-mode filtering unit to be replaced or upgraded as a whole, facilitating flexible adjustments based on different electromagnetic compatibility requirements.

[0013] Optionally, the second Y capacitor unit includes a third Y capacitor and a fourth Y capacitor, wherein the first terminal of the third Y capacitor is connected to the positive line of the multi-stage high-voltage filter device, and the second terminal of the third Y capacitor is grounded; the first terminal of the fourth Y capacitor is connected to the negative line of the multi-stage high-voltage filter device, and the second terminal of the fourth Y capacitor is grounded.

[0014] By placing a Y capacitor between the two magnetic rings and using an independent grounding terminal, the bypass effect of the capacitor is used to enhance the attenuation depth of residual common-mode noise, thereby further improving the filtering effect of common-mode noise.

[0015] Optionally, the second X capacitor unit includes a second X capacitor, the first end of which is connected to the positive line of the multi-stage high-voltage filter device, and the second end of which is connected to the negative line of the multi-stage high-voltage filter device.

[0016] By setting a second X capacitor in the third filter module, which works in conjunction with the first X capacitor in the first filter module to form a multi-stage differential mode filter structure, the residual differential mode noise after the previous stage filter is further reduced, ensuring the quality of DC power received by the power supply module.

[0017] Optionally, the first filtering module, the second filtering module, and the third filtering module are cascaded together via a bolt locking structure. The bolt locking structure has a first bolt hole on the positive locking surface of the positive line of the filter module and a second bolt hole on the negative locking surface of the negative line of the filter module. The lateral center distance between the first bolt hole and the corresponding filter module is different from the lateral center distance between the second bolt hole and the corresponding filter module.

[0018] By adopting this design of asymmetrical bolt holes on the positive and negative locking surfaces, no additional foolproof parts are needed; the anti-reverse connection function can be achieved solely through the structural differences of the locking surfaces themselves.

[0019] Secondly, embodiments of this application provide an electric drive controller, the electric drive controller comprising: Power supply module; Power switching module; And the aforementioned multi-stage high-voltage filter device.

[0020] The electric drive controller proposed in this application allows for individual replacement of any filter module in a multi-stage high-voltage filter system when it fails, eliminating the need for overall disassembly and significantly reducing maintenance difficulty and cost. Simultaneously, the multi-stage high-voltage filter system handles filtering tasks for different noise types and frequency bands, ensuring the performance of the complete filtering link from the power switching module to the power supply module. Furthermore, specific modules can be flexibly replaced or upgraded according to actual electromagnetic compatibility requirements, balancing structural compactness and configuration flexibility.

[0021] Thirdly, embodiments of this application provide a hybrid vehicle, which includes the aforementioned electric drive controller. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a multi-stage high-voltage filter device provided in one embodiment of this application; Figure 2(a) is a schematic diagram of a bolt locking structure provided in an embodiment of this application; Figure 2(b) is a schematic diagram of another structure of the bolt locking structure provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of an electric drive controller provided in an embodiment of this application. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] The electric drive controller of new energy hybrid vehicles is powered by a high-voltage battery. The DC power output from the battery needs to be inverted by the power switching devices within the electric drive controller before it can drive the motor. In order to suppress the electromagnetic interference generated by the rapid switching of power switching devices such as Insulated Gate Bipolar Transistors (IGBTs) and Silicon Carbide Metal-Oxide-Semiconductor Field-Effect Transistors (SiC MOSFETs), a filter device needs to be installed between the high-voltage battery and the power switching devices.

[0026] In some related technologies, the filter components in the filter device are integrated with the thin-film capacitor of the DC bus on the high-voltage battery side, which means that when a single component fails, the entire device needs to be disassembled or replaced, resulting in high maintenance costs.

[0027] Therefore, there is an urgent need for a filtering device that can achieve independent disassembly and assembly at the module level while ensuring filtering effect.

[0028] According to an embodiment of this application, a multi-stage high-voltage filter device 10 is provided. Figure 1 This is a schematic diagram of the structure of the multi-stage high-voltage filter device 10 in the embodiments of this application, as shown below. Figure 1 As shown, the multi-stage high-voltage filter device 10 is connected between the power supply module and the power switching module. It should be noted that this device is designed with electromagnetic interference noise suppression as its starting point, and its signal transmission direction is defined as from the noise source side to the output side. Specifically, the high-intensity conducted noise generated during the high-speed switching process of devices such as IGBTs or SiC MOSFETs in the power switching module enters from one end of the filter device, and is attenuated step-by-step by the first filter module 11, the second filter module 12, and the third filter module 13 before being output from the other end of the multi-stage high-voltage filter device and fed back to the power supply module in the form of low-noise DC power.

[0029] The multi-stage high-voltage filter device 10 includes a first filter module 11, a second filter module 12, and a third filter module 13. The first filter module 11, the second filter module 12, and the third filter module 13 are independently packaged and detachably connected.

[0030] Specifically, the first filter module 11, the second filter module 12, and the third filter module 13 each have independent injection-molded housings. Adjacent modules are electrically connected and mechanically fixed through detachable cascading interfaces. Furthermore, the first filter module 11, the second filter module 12, and the third filter module 13 do not share a common mounting base; they are detachably connected in series only through cascading interfaces. In this way, any filter module can be individually removed from the multi-stage high-voltage filter device 10 without damaging the other filter modules. Each filter module can be independently designed, tested, and replaced according to its noise suppression function.

[0031] The input terminal of the first filtering module 11 is connected to the power switching module, and the first filtering module 11 includes a first X capacitor unit 111 and a first Y capacitor unit 112, so as to use the first X capacitor unit 111 and the first Y capacitor unit 112 to filter the common-mode noise and differential-mode noise generated by the power switching module.

[0032] Specifically, the first filtering module 11 includes an injection-molded housing, within which a copper busbar assembly comprising a positive copper busbar and a negative copper busbar is fixed. It is understood that in this embodiment, the positive copper busbar forms the positive circuit of the multi-stage high-voltage filter device 10, and the negative copper busbar forms the negative circuit of the multi-stage high-voltage filter device 10. The positive and negative copper busbars are arranged in parallel and are insulated from each other. A first X capacitor unit 111 is connected between the positive and negative copper busbars to provide a low-impedance bypass for differential-mode noise. One end of the first Y capacitor unit 112 is connected to either the positive or negative copper busbar, and the other end is connected to an independent grounding terminal outside the housing, providing a discharge path for common-mode noise.

[0033] The input terminal of the second filtering module 12 is connected to the output terminal of the first filtering module 11, and the second filtering module 12 includes a first common-mode inductor unit 121, a second common-mode inductor unit 122 and a second Y capacitor unit 123, so as to perform secondary filtering of common-mode noise using the first common-mode inductor unit 121, the second common-mode inductor unit 122 and the second Y capacitor unit 123.

[0034] Specifically, the second filter module 12 includes another injection-molded housing, within which positive and negative copper busbars are also fixed. The first common-mode inductor unit 121 and the second common-mode inductor unit 122 are arranged sequentially along the signal transmission direction. The positive and negative copper busbars pass sequentially through the first and second common-mode inductor units 121 and 122, respectively, so that common-mode noise is attenuated sequentially by the two common-mode inductor units as it passes through. The second Y-capacitor unit 123 is located between the first and second common-mode inductor units 121 and 122. One end of the capacitor is connected to either the positive or negative copper busbar, and the other end is connected to an independent grounding terminal outside the housing. It works in conjunction with the first and second common-mode inductor units 121 and 122 to further absorb residual common-mode noise after the initial bypassing by the first filter module 11.

[0035] The input terminal of the third filtering module 13 is connected to the output terminal of the second filtering module 12, and the output terminal of the third filtering module 13 is connected to the power supply module. The third filtering module 13 includes a second X capacitor unit 131 to perform secondary filtering on differential mode noise.

[0036] Specifically, the third filter module 13 includes another injection-molded housing, within which positive and negative copper busbars are also fixed. Since the two common-mode inductors in the second filter module 12 do not affect the transmission of differential-mode noise, this embodiment provides a second X capacitor unit 131 in the third filter module 13, connected between the positive and negative copper busbars. This provides a final bypass path for the residual differential-mode noise after passing through the first filter module 11 and the second filter module 12, ensuring that the DC power output to the power supply module has a low differential-mode noise level.

[0037] The multi-stage high-voltage filter device 10 provided in this application embodiment, by designing independently packaged multi-stage filter modules and detachably connecting them in series, allows for individual replacement of any filter module in case of failure, eliminating the need for overall disassembly and significantly reducing maintenance difficulty and cost. Simultaneously, the multi-stage filter modules each undertake filtering tasks for different noise types and frequency bands, ensuring the performance of the complete filtering link from the power switch module to the power supply module. Furthermore, specific modules can be flexibly replaced or upgraded according to actual electromagnetic compatibility requirements, balancing structural compactness and configuration flexibility.

[0038] In some embodiments of this application, such as Figure 1 As shown, the first X capacitor unit 111 includes a first X capacitor CX1, wherein the first end of the first X capacitor CX1 is connected to the positive line of the multi-stage high voltage filter device 10, and the second end of the first X capacitor CX1 is connected to the negative line of the multi-stage high voltage filter device 10.

[0039] Specifically, the first X capacitor CX1 is connected between the positive and negative lines. The high-frequency noise generated by the high-speed switching of the power switching devices includes both differential-mode noise and common-mode noise. The differential-mode noise propagates along the positive and negative lines towards the power supply module. The first X capacitor CX1 provides a low-impedance short-circuit path for the differential-mode noise, causing it to form a local circulating current between the positive and negative lines and preventing its propagation to subsequent stages, thus achieving first-stage bypassing of the differential-mode noise. It can be understood that placing the first X capacitor CX1 closest to the power switching module ensures that the strongest original noise is bypassed and attenuated immediately upon entering the filter, minimizing the degree of noise propagation to subsequent stages and reducing the burden on subsequent filtering stages.

[0040] The first Y-capacitor unit 112 includes a first Y-capacitor CY1 and a second Y-capacitor CY2. The first terminal of the first Y-capacitor CY1 is connected to the positive line of the multi-stage high-voltage filter device 10, and the second terminal of the first Y-capacitor CY1 is grounded. The first terminal of the second Y-capacitor CY2 is connected to the negative line of the multi-stage high-voltage filter device 10, and the second terminal of the second Y-capacitor CY2 is grounded.

[0041] Specifically, the first Y capacitor CY1 is connected between the positive line and ground, and the second Y capacitor CY2 is connected between the negative line and ground. The two Y capacitors provide a discharge path for common-mode noise from the high-voltage bus to the controller housing ground. It should be noted that in this embodiment, these two Y capacitors are also placed in the first module adjacent to the noise source. This is primarily because the energy of common-mode noise is strongest near the power switch module; placing the Y capacitors here minimizes the discharge path and the circulating current area, thus achieving the optimal bypass effect. Furthermore, the grounding terminal of the first filter module 11 is independently led out, allowing the common-mode current to flow directly into the grounding terminal from here, without flowing through the grounding loops of the second filter module 12 or the third filter module 13. This effectively avoids common-mode coupling crosstalk between multiple modules caused by sharing a grounding path.

[0042] Therefore, in this embodiment of the application, by simultaneously setting an X capacitor connected between the positive and negative lines and two Y capacitors connected to ground respectively in the first filtering module 11, the differential-mode interference and common-mode interference are significantly attenuated at the initial stage of noise entering the filtering device by utilizing the coordinated work of the Y capacitor and the X capacitor, thereby significantly reducing the filtering burden of the subsequent filtering module.

[0043] In some embodiments of this application, such as Figure 1 As shown, the first common-mode inductor unit 121 includes a first magnetic ring LCM1, through which the positive and negative lines of the multi-stage high-voltage filter device 10 pass. The second common-mode inductor unit 122 includes a second magnetic ring LCM2, through which the positive and negative lines of the multi-stage high-voltage filter device 10 pass.

[0044] Specifically, the first magnetic ring LCM1 and the second magnetic ring LCM2 are arranged sequentially within the housing of the second filter module 12 along the signal transmission direction, with the first magnetic ring LCM1 near the input terminal of the second filter module 12 and the second magnetic ring LCM2 near the output terminal of the second filter module 12. The positive and negative lines pass through the annular holes of both magnetic rings. When the common-mode noise current flows in the same direction on the positive and negative lines, each magnetic ring presents a high impedance to it. However, for the differential-mode noise current, since it flows in opposite directions on the positive and negative lines, the magnetic flux generated in the magnetic rings cancels each other out, and the two magnetic rings present almost no impedance. Through this arrangement, common-mode noise is progressively suppressed as it passes through the two magnetic rings, while differential-mode noise passes through with virtually no loss.

[0045] Optionally, in some embodiments of this application, the first magnetic ring LCM1 is a nanocrystalline magnetic ring, and the second magnetic ring LCM2 is a ferrite magnetic ring. Nanocrystalline magnetic rings have high permeability and inductive reactance in the lower frequency band (typically hundreds of kHz to several MHz), making them suitable for absorbing common-mode energy in the low-frequency band. Ferrite magnetic rings have good frequency response in the high-frequency band (several MHz to hundreds of MHz), making them suitable for suppressing common-mode noise in the high-frequency band. Placing the nanocrystalline magnetic ring in front and the ferrite magnetic ring behind allows common-mode noise to be attenuated sequentially from low to high frequency, achieving segmented deep suppression of common-mode noise.

[0046] Therefore, this embodiment of the application ensures a wide-band common-mode noise suppression effect by sequentially arranging the nanocrystalline magnetic ring and the ferrite magnetic ring along the signal direction within the same module, and allowing the positive and negative lines to pass through both simultaneously. Furthermore, integrating the two magnetic rings into a detachable module allows the common-mode filtering unit to be replaced or upgraded as a whole, facilitating flexible adjustments according to different electromagnetic compatibility requirements.

[0047] In some embodiments of this application, such as Figure 1 As shown, the second Y capacitor unit 123 includes a third Y capacitor CY3 and a fourth Y capacitor CY4. The first end of the third Y capacitor CY3 is connected to the positive line of the multi-stage high-voltage filter device 10, and the second end of the third Y capacitor CY3 is grounded. The first end of the fourth Y capacitor CY4 is connected to the negative line of the multi-stage high-voltage filter device 10, and the second end of the fourth Y capacitor CY4 is grounded.

[0048] Specifically, the third Y capacitor CY3 and the fourth Y capacitor CY4 are located between the first magnetic ring LCM1 and the second magnetic ring LCM2 in the signal transmission direction. One end of each Y capacitor is connected to the positive and negative lines, respectively, and the other end is connected to the grounding terminal independently led out from the second filter module 12. This grounding terminal is isolated from the grounding terminals of the first filter module 11 and the third filter module 13. In this way, after common-mode noise is input into the second filter module 12, it is first initially attenuated by the first magnetic ring LCM1, then discharged to ground through the Y capacitors, and finally further suppressed by the second magnetic ring LCM2, thereby achieving multi-stage notch absorption of common-mode noise within a single module.

[0049] Therefore, this embodiment of the application enhances the attenuation depth of residual common-mode noise by setting a Y capacitor between the two magnetic rings and using an independent grounding terminal, thereby improving the filtering effect of common-mode noise.

[0050] In some embodiments of this application, such as Figure 1 As shown, the second X capacitor unit 131 includes a second X capacitor CX2. The first end of the second X capacitor CX2 is connected to the positive line of the multi-stage high-voltage filter device 10, and the second end of the second X capacitor CX2 is connected to the negative line of the multi-stage high-voltage filter device 10.

[0051] Specifically, the second X capacitor CX2 is connected between the positive and negative copper busbars of the third filter module 13. It can be understood that after the successive attenuation by the first filter module 11 and the second filter module 12, the common-mode noise has been largely bypassed and absorbed, leaving differential-mode components as the main residual noise. The second X capacitor CX2 provides a low-impedance short-circuit path for the residual differential-mode noise, causing the differential-mode current to form a local circulating current between the positive and negative lines and preventing it from propagating to subsequent stages. This provides secondary attenuation of the differential-mode noise at the output, ensuring that the DC power output to the power supply module has a low differential-mode noise level.

[0052] Therefore, in this embodiment of the application, by setting a second X capacitor CX2 in the third filter module 13, which works in conjunction with the first X capacitor CX1 in the first filter module 11 to form a multi-stage differential mode filter structure, the residual differential mode noise after the previous stage of filtering is further reduced, and the quality of DC power received by the power supply module is guaranteed.

[0053] In some embodiments of this application, the first filter module 11, the second filter module 12, and the third filter module 13 are sequentially cascaded together by a bolt locking structure. Specifically, the bolt locking structure has a first bolt hole 141 on the positive locking surface 14 of the positive line of the corresponding filter module, and a second bolt hole 151 on the negative locking surface 15 of the corresponding filter module. Furthermore, the lateral center distance between the first bolt hole 141 and the corresponding filter module is different from the lateral center distance between the second bolt hole 151 and the corresponding filter module.

[0054] Specifically, as shown in Figures 2(a) and 2(b), taking the cascaded interface between the first filter module 11 and the second filter module 12 as an example, the output end housing of the first filter module 11 has a positive locking surface 14 and a negative locking surface 15 exposed, and the input end of the second filter module 12 has a corresponding locking surface with the same structure. A bolt hole is provided on both the positive locking surface 14 and the negative locking surface 15. The lateral center distance between the first bolt hole 141 and the first filter module 11 refers to the first distance D1 between the center of the plane of the first filter module 11 parallel to the positive locking surface and the center of the bolt hole thereon. Similarly, the lateral center distance between the second bolt hole 151 and the first filter module 11 refers to the second distance D2 between the center of the plane of the first filter module 11 parallel to the negative locking surface 15 and the center of the bolt hole thereon. The first distance D1 is not equal to the second distance D2. Optionally, the first distance D1 can be 30mm, and the second distance D2 can be 20mm. Similarly, the input end housing of the second filter module 12 has a positive locking surface 14 and a negative locking surface 15 exposed. The position of its bolt hole corresponds to the position of the bolt hole of the first filter module 11. The distance between the positive electrode and the negative electrode is D2.

[0055] As can be understood, as shown in Figure 2(a), by setting different lateral center distances, the bolt holes are positioned differently relative to the corresponding filter modules, thus achieving a foolproof structural design. As shown in Figure 2(b), during assembly, if an attempt is made to align the positive locking surface 14 of the first filter module 11 with the negative locking surface 15 of the second filter module 12, the bolt holes on the positive and negative locking surfaces cannot be aligned due to the mismatch in lateral center distances relative to the corresponding filter modules, preventing the bolt from being inserted. This physically prevents the incorrect operation of reverse polarity connection. Using this asymmetrical bolt hole design on the positive and negative locking surfaces eliminates the need for any additional foolproof parts; the reverse polarity prevention function is achieved solely through the structural differences of the locking surfaces themselves.

[0056] Therefore, the embodiment of this application adopts this asymmetrical hole spacing design, which does not require any additional foolproof parts, and can achieve the anti-reverse connection function simply by the structural difference of the locking surface itself.

[0057] Accordingly, such as Figure 3As shown, this application provides an electric drive controller, which includes a power supply module 30, a power switch module 20, and a multi-stage high-voltage filter device 10 as described in the above embodiment.

[0058] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0059] Accordingly, this application provides a hybrid vehicle, which includes an electric drive controller as described in the above embodiments.

[0060] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0062] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0063] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A multi-stage high-voltage filter device, characterized in that, The multi-stage high-voltage filter device is connected between the power supply module and the power switch module. The multi-stage high-voltage filter device includes a first filter module (11), a second filter module (12) and a third filter module (13). The first filter module (11), the second filter module (12) and the third filter module (13) are independently packaged and detachably connected to each other. The input terminal of the first filtering module (11) is connected to the power switch module, and the first filtering module (11) includes a first X capacitor unit (111) and a first Y capacitor unit (112) to filter the common-mode noise and differential-mode noise generated by the power switch module once using the first X capacitor unit (111) and the first Y capacitor unit (112). The input terminal of the second filtering module (12) is connected to the output terminal of the first filtering module (11), and the second filtering module (12) includes a first common-mode inductor unit (121), a second common-mode inductor unit (122) and a second Y capacitor unit (123) to perform secondary filtering on the common-mode noise using the first common-mode inductor unit (121), the second common-mode inductor unit (122) and the second Y capacitor unit (123); The input terminal of the third filtering module (13) is connected to the output terminal of the second filtering module (12), and the output terminal of the third filtering module (13) is connected to the power supply module. The third filtering module (13) includes a second X capacitor unit (131) to perform secondary filtering on the differential noise using the second X capacitor unit (131).

2. The apparatus according to claim 1, characterized in that, The first X capacitor unit (111) includes a first X capacitor CX1, wherein the first end of the first X capacitor CX1 is connected to the positive line of the multi-stage high voltage filter device, and the second end of the first X capacitor CX1 is connected to the negative line of the multi-stage high voltage filter device.

3. The apparatus according to claim 1, characterized in that, The first Y capacitor unit (112) includes a first Y capacitor CY1 and a second Y capacitor CY2. The first end of the first Y capacitor CY1 is connected to the positive line of the multi-stage high-voltage filter device, and the second end of the first Y capacitor CY1 is grounded. The first end of the second Y capacitor CY2 is connected to the negative line of the multi-stage high-voltage filter device, and the second end of the second Y capacitor CY2 is grounded.

4. The apparatus according to claim 1, characterized in that, The first common-mode inductor unit (121) includes a first magnetic ring LCM1, through which the positive and negative lines of the multi-stage high-voltage filter device pass; wherein the first magnetic ring LCM1 is a nanocrystalline magnetic ring.

5. The apparatus according to claim 1, characterized in that, The second common-mode inductor unit (122) includes a second magnetic ring LCM2, through which the positive and negative lines of the multi-stage high-voltage filter device pass; wherein the second magnetic ring LCM2 is a ferrite magnetic ring.

6. The apparatus according to claim 1, characterized in that, The second Y capacitor unit (123) includes a third Y capacitor CY3 and a fourth Y capacitor CY4. The first end of the third Y capacitor CY3 is connected to the positive line of the multi-stage high-voltage filter device, and the second end of the third Y capacitor CY3 is grounded. The first end of the fourth Y capacitor CY4 is connected to the negative line of the multi-stage high-voltage filter device, and the second end of the fourth Y capacitor CY4 is grounded.

7. The apparatus according to claim 1, characterized in that, The second X capacitor unit (131) includes a second X capacitor CX2. The first end of the second X capacitor CX2 is connected to the positive line of the multi-stage high voltage filter device, and the second end of the second X capacitor CX2 is connected to the negative line of the multi-stage high voltage filter device.

8. The apparatus according to claim 1, characterized in that, The first filter module (11), the second filter module (12), and the third filter module (13) are sequentially cascaded together by a bolt locking structure; The bolt locking structure has a first bolt hole on the positive locking surface of the positive line of the filter module and a second bolt hole on the negative locking surface of the negative line of the filter module. The lateral center distance between the first bolt hole and the corresponding filter module is different from the lateral center distance between the second bolt hole and the corresponding filter module.

9. An electric drive controller, characterized in that, The electric drive controller includes: Power supply module (30); Power switch module (20); And the multi-stage high-voltage filter device (10) as described in any one of claims 1 to 8.

10. A hybrid vehicle, characterized in that, The hybrid vehicle includes the electric drive controller as described in claim 9.

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