Filter for power assembly

Abstract

The utility model provides a filter for a power assembly, and belongs to the technical field of filters. The conductive piece is fixed in the shell, a heat dissipation terminal is arranged on the conductive piece, a heat dissipation through hole is formed in the shell, and the heat dissipation terminal is fixedly embedded in the heat dissipation through hole; the magnetic ring is arranged in the shell, and the conductive part is sleeved with the magnetic ring; the capacitor bank is arranged in the shell, and capacitors in the capacitor bank are electrically connected with the conductive piece; the filter has the advantages that the filter is generally made of a plastic material, the heat dissipation performance is poor, and heat in the shell is not easy to dissipate into the external space, so that the heat dissipation terminals are arranged, the shell is provided with the heat dissipation through holes, and the heat dissipation terminals are embedded and fixed in the heat dissipation through holes, so that the heat dissipation terminals can be connected with the external space and parts, and the heat dissipation performance of the filter is improved. For example, the heat dissipation terminal can be connected with the controller aluminum shell, the controller aluminum shell is used for heat dissipation, the temperature in the shell is reduced, normal use of the filter is ensured, connection with external space and parts is reasonably utilized, a heat dissipation device does not need to be additionally arranged in the filter, and the occupied volume of the filter is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters, and particularly relates to a filter for a powertrain. Background Art

[0002] In a new energy vehicle electric drive powertrain, a motor controller controls and drives the operation of a motor through power modules such as IGBTs. The relatively high operating frequency of the power modules determines that an electromagnetic filtering device is required to perform electromagnetic filtering within a certain frequency range to ensure good electromagnetic compatibility performance of the electric drive system. With the development of electric vehicles, the requirements for electromagnetic compatibility performance are also getting higher and higher.

[0003] The existing filtering device mainly consists of parts such as current-carrying copper bars, magnetic rings, capacitors, printed circuit boards, and injection molded housings. In the filtering device, since its housing is made of plastic, the heat dissipation efficiency is not high. Generally, a heat dissipation device is added to the filtering device. While increasing the production cost, the use of the heat dissipation device will also occupy the volume of the filtering device. Summary of the Utility Model

[0004] The purpose of the utility model is to address the above problems existing in the prior art and propose a filter that utilizes external space and parts for heat dissipation.

[0005] The purpose of the utility model can be achieved by the following technical solutions: A filter for a powertrain, comprising:

[0006] A housing;

[0007] A conductive member, which is fixed inside the housing, and a heat dissipation terminal is provided on the conductive member. A heat dissipation through hole is provided inside the housing, and the heat dissipation terminal is embedded in the heat dissipation through hole;

[0008] A magnetic ring, which is arranged inside the housing and the magnetic ring is sleeved on the conductive member;

[0009] A capacitor bank, which is arranged inside the housing, and the capacitors in the capacitor bank are electrically connected to the conductive member.

[0010] In the above-mentioned filter for a powertrain, the heat dissipation through hole is filled with potting glue to fix the heat dissipation terminal to the housing.

[0011] In the above-mentioned filter for a powertrain, an installation cavity is provided inside the housing, reinforcing ribs are provided on the cavity wall of the installation cavity, the magnetic ring is arranged in the installation cavity, and the reinforcing ribs are in contact with the magnetic ring.

[0012] In the above-mentioned filter for a powertrain, the number of magnetic rings is at least one, and accommodating cavities are provided on both sides of each magnetic ring, and the capacitor bank is located in the corresponding accommodating cavity.

[0013] In the above-mentioned filter for a powertrain, each capacitor bank includes a first capacitor, a second capacitor and a third capacitor. The conductive member includes a positive electrode section and a negative electrode section which are insulated from each other. First connection pins are fixedly provided on both the positive electrode section and the negative electrode section. A second connection pin is fixedly provided on the housing. The first connection pin and the second connection pin are electrically connected to the first capacitor, the second capacitor and the third capacitor respectively.

[0014] In the above-mentioned filter for a powertrain, the first pole of the first capacitor, the first pole of the second capacitor are electrically connected to the first connection pin of the positive electrode section, the second pole of the first capacitor and the first pole of the third capacitor are electrically connected to the first connection pin of the negative electrode section, and the second connection pin is electrically connected to the second pole of the second capacitor and the second pole of the third capacitor.

[0015] In the above-mentioned filter for a powertrain, a circuit board is provided on the housing, and the first connection pin, the second connection pin and the capacitor bank are electrically connected through the circuit board.

[0016] In the above-mentioned filter for a powertrain, positioning posts are provided on the end face of the housing, and positioning holes are formed on the circuit board. When the circuit board is installed on the housing, the positioning posts pass through the positioning holes.

[0017] In the above-mentioned filter for a powertrain, fixing blocks are provided on the outer walls of the positive electrode section and the negative electrode section of the conductive member, mounting holes are provided on the first connection pin, and the fixing blocks pass through the mounting holes to fix the first connection pin and the conductive member.

[0018] In the above-mentioned filter for a powertrain, a gap is provided between the positive electrode section and the negative electrode section, and an insulating sheet is provided at the gap.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] (1) Generally, the material of the filter is plastic, with poor heat dissipation performance. It is not easy for the heat inside the housing to dissipate into the external space. Therefore, in this application, a heat dissipation terminal is provided, and heat dissipation through holes are provided on the housing. The heat dissipation terminal is embedded in the heat dissipation through holes, enabling the heat dissipation terminal to be connected to the external space and components. For example, the heat dissipation terminal can be connected to the aluminum shell of the controller to utilize the aluminum shell of the controller for heat dissipation, reduce the temperature inside the housing, ensure the normal use of the filter, make reasonable use of the connection with the external space and components, and there is no need to add a heat dissipation device inside the filter, reducing its occupied volume.

[0021] (2) The setting of the reinforcing ribs can not only reinforce the installation cavity, but also raise the magnetic ring, facilitating subsequent potting, and at the same time improving the seismic resistance of the magnetic ring. Description of the Drawings

[0022] Figure 1 is one of the three-dimensional structural schematic diagrams of the present utility model;

[0023] Figure 2 is Figure 1 the three-dimensional structural schematic diagram after removing the circuit board;

[0024] Figure 3 is Figure 1 the exploded structural schematic diagram of

[0025] Figure 4 is the second three-dimensional structural schematic diagram of the present utility model;

[0026] Figure 5 is the three-dimensional structural schematic diagram of the conductive component in the present utility model.

[0027] In the figure, housing 100; heat dissipation through hole 101; installation cavity 102; reinforcing rib 103;

[0028] conductive component 200; positive electrode section 201; negative electrode section 202; heat dissipation terminal 203; magnetic ring 204; first capacitor 205; second capacitor 206; third capacitor 207; first connection pin 210; second connection pin 211; circuit board 212; positioning post 213; positioning hole 214; fixing block 215; insulating sheet 217; insulating board 218; connecting plate 219; creepage board 220. Detailed Embodiment

[0029] The following are specific embodiments of the present utility model in combination with the accompanying drawings to further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] As Figure 1 and Figure 5 shown, a filter for a powertrain includes:

[0032] A housing 100;

[0033] A conductive member 200, which is fixed in the housing 100, and a heat dissipation terminal 203 is provided on the conductive member 200. A heat dissipation through hole 101 is provided in the housing 100, and the heat dissipation terminal 203 is embedded in the heat dissipation through hole 101;

[0034] A magnetic ring 204, which is arranged in the housing 100, and the magnetic ring 204 is sleeved on the conductive member 200;

[0035] A capacitor bank, which is arranged in the housing 100, and the capacitors in the capacitor bank are electrically connected to the conductive member 200.

[0036] In this embodiment, the material of the filter is generally plastic, and its heat dissipation performance is poor. The heat in the housing 100 is not easily dissipated to the external space. Therefore, in this application, by providing the heat dissipation terminal 203, and the housing 100 is provided with the heat dissipation through hole 101, and the heat dissipation terminal 203 is embedded in the heat dissipation through hole 101, the heat dissipation terminal 203 can be connected to the external space and parts. For example, the heat dissipation terminal 203 can be connected to the aluminum shell of the controller, and the aluminum shell of the controller is used for heat dissipation, reducing the temperature in the housing 100, ensuring the normal use of the filter, reasonably utilizing the connection with the external space and parts, without adding a heat dissipation device in the filter, and reducing its occupied volume.

[0037] It is worth mentioning that the conductive member 200 can be selected as a copper busbar.

[0038] Further preferably, the heat dissipation through hole 101 is filled with potting glue to fix the heat dissipation terminal 203 to the housing 100.

[0039] In this embodiment, it is preferably set that the potting glue is a thermal conductive glue, which can not only ensure the stable connection between the heat dissipation terminal 203 and the housing 100, but also transfer the heat of the heat dissipation terminal 203 by using the thermal conductive glue.

[0040] It is worth mentioning that the heat dissipation terminal 203 includes heat dissipation fins integrally formed by bending on the positive and negative electrodes of the conductive member 200.

[0041] Further preferably, an installation cavity 102 is provided inside the outer shell 100, reinforcing ribs 103 are provided on the cavity wall of the installation cavity 102, the magnetic ring 204 is arranged inside the installation cavity 102, and the reinforcing ribs 103 abut against the magnetic ring 204.

[0042] In this embodiment, the arrangement of the reinforcing ribs 103 can not only reinforce the installation cavity 102, but also raise the magnetic ring 204, which is convenient for subsequent potting and can also improve the seismic resistance of the magnetic ring 204.

[0043] Preferably, the number of the magnetic rings 204 is at least one, accommodating cavities are arranged on both sides of each magnetic ring 204, and the capacitor bank is located in the corresponding accommodating cavities.

[0044] As Figure 1 shown, as a preferred solution, the number of the magnetic rings 204 is two, capacitor banks are arranged on both sides of the two magnetic rings 204, and the capacitor bank located in the middle position between the two magnetic rings 204 can be shared. By adjusting the different capacitance values in the capacitor bank, the three capacitor banks can respectively achieve low-frequency suppression, medium-frequency suppression and high-frequency suppression.

[0045] Further preferably, each capacitor bank includes a first capacitor 205, a second capacitor 206 and a third capacitor 207. The conductive member 200 includes a positive electrode section 201 and a negative electrode section 202 which are insulated from each other. First connection pins 210 are fixedly arranged on both the positive electrode section 201 and the negative electrode section 202, and a second connection pin 211 is fixedly arranged on the outer shell 100. The first connection pins 210 and the second connection pin 211 are respectively electrically connected to the first capacitor 205, the second capacitor 206 and the third capacitor 207.

[0046] In this embodiment, the first connection pin 210 realizes the electrical connection between the capacitor and the conductive member 200, and the second connection pin 211 is arranged on the outer shell 100 and serves as a grounding pin.

[0047] Specifically, the first pole of the first capacitor 205, the first pole of the second capacitor 206 are electrically connected to the first connection pin 210 of the positive electrode section 201, the second pole of the first capacitor 205, the first pole of the third capacitor 207 are electrically connected to the first connection pin 210 of the negative electrode section 202, and the second connection pin 211 is electrically connected to the second pole of the second capacitor 206 and the second pole of the third capacitor 207.

[0048] Further preferably, a circuit board 212 is arranged on the outer shell 100, and the first connection pins 210, the second connection pin 211 and the capacitor bank are electrically connected through the circuit board 212.

[0049] Specifically, positioning posts 213 are provided on the end face of the outer shell 100, and positioning holes 214 are formed on the circuit board 212. When the circuit board 212 is installed on the outer shell 100, the positioning posts 213 pass through the positioning holes 214.

[0050] In this embodiment, the outer shell 100 is a semi-closed outer shell 100. Positioning posts 213 are provided on the notch end face of the outer shell 100, and positioning holes 214 are provided on the circuit board 212. The positioning posts 213 pass through the positioning holes 214 to perform assembly positioning between the outer shell 100 and the circuit board 212. The first connection pin 210 and the second connection pin 211 pass through the circuit board 212 and are electrically connected to the circuit board 212. The connection leads of the capacitors in the capacitor group also pass through the circuit board 212 and are electrically connected to it respectively.

[0051] Further preferably, fixing blocks 215 are provided on the outer walls of the positive electrode section 201 and the negative electrode section 202 of the conductive member 200. Mounting holes are provided on the first connection pin 210. The fixing blocks 215 pass through the mounting holes to fix the first connection pin 210 and the conductive member 200.

[0052] In this embodiment, in order to facilitate the connection between the first connection pin 210 and the conductive member 200, a fixing block 215 is provided on the conductive member 200, and a mounting hole is provided on the first connection pin 210. The mounting hole on the first connection pin 210 is inserted and fixed with the fixing block 215 on the conductive member 200 to achieve the connection between the two.

[0053] Further preferably, a gap is provided between the positive electrode section 201 and the negative electrode section 202, and an insulating sheet 217 is provided at the gap.

[0054] It is worth mentioning that a connecting plate 219 is integrally provided on the outer shell 100. The connecting plate 219 is located in the gap between the connection terminals at one end of the conductive member 200, and a limiting groove is provided on the connecting plate 219. The insulating sheet 217 is stuck in the limiting groove.

[0055] In this embodiment, an insulating plate 218 is integrally provided on the insulating sheet 217. The insulating plate 218 is respectively placed on the positive electrode section 201 and the negative electrode section 202, and the insulating sheet 217 extends into the gap between the positive electrode section 201 and the negative electrode section 202 to ensure the creepage distance and electrical clearance.

[0056] It is worth mentioning that a creepage plate 220 is also provided on the outer shell 100. The creepage plate 220 is located in the gap between the connection terminals of the conductive member 200 to increase the creepage distance.

[0057] It should be noted that in the present utility model, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. Terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0058] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0059] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A filter for a powertrain, characterized in that: include: shell; A conductive member fixed in the housing, and provided with a heat dissipation terminal on the conductive member, a heat dissipation through hole provided in the housing, and the heat dissipation terminal embedded in the heat dissipation through hole; A magnetic ring is arranged in the housing and sleeved on the conductive member; A capacitor group is arranged in the housing, and the capacitors in the capacitor group are electrically connected to the conductive member.

2. A filter for a powertrain according to claim 1, characterized in that: The heat dissipation through hole is filled with potting glue to fix the heat dissipation terminal and the shell.

3. The filter for a powertrain according to claim 1, characterized in that: An installation cavity is arranged in the shell, a cavity wall of the installation cavity is provided with reinforcing ribs, the magnetic ring is arranged in the installation cavity, and the reinforcing ribs abut against the magnetic ring.

4. The filter for a powertrain according to claim 1, characterized in that: The number of the magnetic ring is at least one, and each of the magnetic rings is provided with a receiving cavity on both sides, and the capacitor group is located in the corresponding receiving cavity.

5. A filter for a powertrain according to claim 1 or 4, characterized in that: Each of the capacitor groups includes a first capacitor, a second capacitor and a third capacitor, the conductive member includes a positive electrode segment and a negative electrode segment insulated from each other, a first connecting pin is fixedly provided on the positive electrode segment and the negative electrode segment, a second connecting pin is fixedly provided on the housing, and the first connecting pin and the second connecting pin are electrically connected to the first capacitor, the second capacitor and the third capacitor respectively.

6. A filter for a powertrain according to claim 5, characterized in that: The first electrode of the first capacitor and the first electrode of the second capacitor are electrically connected to the first connecting pin of the positive segment, the second electrode of the first capacitor and the first electrode of the third capacitor are electrically connected to the first connecting pin of the negative segment, and the second connecting pin is electrically connected to the second electrode of the second capacitor and the second electrode of the third capacitor.

7. The filter for a powertrain according to claim 5, characterized in that: A circuit board is disposed on the housing, and the first connecting pin, the second connecting pin and the capacitor group are electrically connected through the circuit board.

8. The filter for a powertrain according to claim 7, characterized in that: A positioning column is arranged on the end surface of the shell, and a positioning hole is opened on the circuit board. When the circuit board is installed on the shell, the positioning column passes through the positioning hole.

9. The filter for a powertrain according to claim 5, characterized in that: A fixing block is provided on the outer wall of the positive electrode section and the negative electrode section of the conductive member, and a mounting hole is provided on the first connecting pin. The fixing block passes through the mounting hole to fix the first connecting pin and the conductive member.

10. The filter for a powertrain according to claim 5, characterized in that: A gap is provided between the positive electrode segment and the negative electrode segment, and an insulating sheet is provided at the gap.

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