Film capacitor of motor controller

Abstract

The invention provides a motor controller thin-film capacitor, and the capacitor comprises a housing which is provided with an opening and a cooling structure. The capacitor core is arranged in the shell; the capacitor core is provided with a metal terminal, the metal terminal extends out of the shell through the opening, and one end, far away from the capacitor core, of the metal terminal is provided with a bent wiring end; the positioning adjusting assembly is located in the shell; the capacitor core is detachably connected with one of two inner side walls which are oppositely arranged in the shell through the positioning adjusting assembly, and is configured to adjust the application direction of one end, far away from the capacitor core, of the metal terminal; the pouring sealant is filled in the shell; the pouring sealant covers the capacitor core, the positioning adjusting assembly and the part, located in the shell, of the metal terminal. According to the thin-film capacitor, the mounting position of the capacitor core in the shell can be changed by applying the positioning adjusting assembly, and then the application direction of the end part of the metal terminal is changed, so that the adaptability and compatibility of the thin-film capacitor are improved, and the application range of the thin-film capacitor is widened.

Description

Technical Field

[0001] The present application relates to the field of capacitor technology, and in particular to a thin film capacitor for a motor controller. Background Art

[0002] Film capacitors are one of the components of the controller, used to maintain the stability and reliability of the controller's operation, and are widely used in various fields. Since film capacitors are heat-generating units, they will generate a lot of heat during actual application and operation, so appropriate cooling measures are needed to maintain their operating temperature. Taking new energy vehicles as an example, film capacitors are an important component of the controller in the electric drive system. At present, there are many models on the market, the update frequency is fast, and the configurations of different models vary greatly. Therefore, the structure and layout requirements of film capacitors are relatively strict. Affected by factors such as the installation position of the film capacitor, the distribution of metal terminals, and the connection form with the cooling structure, the film capacitors in related technologies have poor adaptability and a narrow application range. They are difficult to cope with and slow controllers with large configuration differences and fast update frequencies, which brings more negative impacts to the design and application of film capacitors. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a motor controller thin film capacitor to solve some or all of the above-mentioned technical problems.

[0004] Based on the above purpose, the present application provides a motor controller thin film capacitor, including:

[0005] A shell, wherein the shell is respectively provided with an opening and a cooling structure;

[0006] A capacitor core is arranged in the housing; the capacitor core is provided with a metal terminal, the metal terminal extends to the outside of the housing through the opening, and a bent terminal is arranged at one end of the metal terminal away from the capacitor core;

[0007] A positioning adjustment component is located in the housing; the capacitor core is detachably connected to one of two inner side walls oppositely arranged in the housing through the positioning adjustment component, and is configured to adjust the application direction of the metal terminal away from one end of the capacitor core;

[0008] A potting compound is filled in the shell; the potting compound covers the capacitor core, the positioning adjustment component and the part of the metal terminal located in the shell respectively.

[0009] From the above, it can be seen that the motor controller film capacitor provided by the present application can make the capacitor core and the surface of one of the two inner walls opposite to each other in the shell be aligned with the positioning and adjustment component in the shell to realize the pre-installation of the capacitor core and change the installation position of the capacitor core in the shell; since the capacitor core is provided with a metal terminal, the application direction of the wiring terminal of the metal terminal can be adjusted by changing the installation position of the capacitor core, so that it can meet the installation position of the film capacitor in different situations, enhance the reliability of the connection between the film capacitor and the optional module, help to improve the adaptability and compatibility of the film capacitor, and broaden the application scope of the film capacitor; it is also beneficial to reduce the design difficulty and production cost of the film capacitor, and enhance the competitiveness of the enterprise in the capacitor market. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 This is a schematic diagram of the structure of a thin film capacitor in this application;

[0012] Figure 2 for Figure 1 Explosion diagram of the film capacitor in the figure;

[0013] Figure 3 This is a schematic diagram of the structure of a thin film capacitor in this application;

[0014] Figure 4 It is a three-dimensional schematic diagram of the housing and cooling structure in this application;

[0015] Figure 5 It is a partial enlarged schematic diagram of the connection structure in this application;

[0016] Figure 6 This is a schematic diagram of the structure of the positioning connecting column in this application;

[0017] Figure 7 This is a schematic diagram of the distribution of the positioning rails in one embodiment of the present application;

[0018] Figure 8 This is a schematic diagram of the distribution of positioning rails in another embodiment of the present application;

[0019] Fig. 9 This is a schematic diagram of the distribution of positioning rails in another embodiment of the present application;

[0020] Fig.10This is a schematic diagram of the structure of a power brick using a film capacitor in this application;

[0021] Fig.11 for Fig.10 Schematic diagram of the explosion of a medium power brick Figure 1 ;

[0022] Fig.12 for Fig.10 Schematic diagram of the explosion of a medium power brick Figure 2 ;

[0023] Fig.13 This is a schematic diagram of the structure of the capacitor module with air cooling function in this application;

[0024] Fig.14 for Fig.13 Explosion diagram of the capacitor module;

[0025] Fig.15 A schematic diagram of a controller using a thin film capacitor in this application;

[0026] Fig.16 for Fig.15 Exploded diagram of the controller.

[0027] Description of reference numerals:

[0028] 100, housing; 101, opening; 102, cooling structure; 1021, water cooling plate; 1022, cooling channel; 1023, first port; 1024, second port; 1025, sealing groove; 103, mounting surface; 104, assembly groove; 105, connecting hole;

[0029] 200, capacitor core; 201, metal terminal; 202, connection terminal;

[0030] 310, connection structure; 3101, plug-in channel; 311, fastening part; 312, limiting part; 313, transition part; 320, positioning connection column; 321, limiting groove; 330, positioning guide rail; 340, extension slideway; 350, adjustment slide rail;

[0031] 400, potting glue;

[0032] 510, first cooling layer; 520, second cooling layer; 530, inner sealing ring; 540, outer sealing ring; 550, electric drive module; 560, blocking plate;

[0033] 610, mounting plate; 620, fin;

[0034] 710, mounting shell; 720, driving circuit board. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0036] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] Film capacitors are an important component of the controller unit of the electric control system. They play a key role in maintaining the stability and reliability of the electric control system and are widely used in the fields of vehicles, medical treatment, aerospace, etc. Especially in the context of the rapid development of the new energy vehicle market, the electric drive system is one of the core configurations of the vehicle, and its performance optimization and technological innovation are crucial to promoting the development of the entire industry. With the growing demand for electric drive systems with higher power density and more compact design, components such as controllers in electric drive systems are moving towards integration and miniaturization. In this process, film capacitors are indispensable because of their characteristics in ensuring the stable operation of electric drive systems.

[0038] In the related art, when the vehicle is running, the film capacitor in the motor controller will emit a lot of heat, and it is necessary to use a reasonable cooling structure and take effective cooling measures to control its operating temperature; in the face of the diverse vehicle models and rapidly changing technical specifications on the market, in order to ensure that the film capacitor can adapt well to the needs of different vehicle models, it is usually necessary to customize it; however, although customized design can improve the adaptability and application scope of the product, it also faces high cost investment and long design cycle, which to a certain extent restricts the speed of product development and makes it difficult to keep pace with the rhythm of product research and development; if a customized solution is not adopted, the film capacitor in the related art may show poor compatibility and narrow application scenarios during the application process due to factors such as its installation position, metal terminal layout and connection form design with the cooling structure, which will limit the adaptability between the capacitor film and the vehicle when facing a variety of models and frequent iterations. It may cause the film capacitor to be unable to be used in the corresponding model, or it is difficult to achieve the expected energy efficiency, which will add unnecessary cost burden to the company and reduce the company's competitiveness in the industry, and also affect the overall performance of the vehicle.

[0039] In view of this, the present application provides a thin film capacitor, including a shell 100, a capacitor core 200, a positioning adjustment component and a potting compound 400; an opening 101 and a cooling structure 102 are respectively provided on one side of the shell 100; the capacitor core 200 is arranged in the shell 100; the capacitor core 200 is provided with a metal terminal 201, the metal terminal 201 extends to the outside of the shell 100 through the opening 101, and a bent terminal 202 is provided at one end of the metal terminal 201 away from the capacitor core 200; the positioning adjustment component is located in the shell 100; the capacitor core 200 is detachably connected to one of the two inner side walls arranged opposite to each other in the shell 100 through the positioning adjustment component, and is configured to adjust the application direction of the metal terminal 201 away from one end of the capacitor core 200; the potting compound 400 is filled in the shell 100; the potting compound 400 respectively covers the capacitor core 200, the positioning adjustment component and the part of the metal terminal 201 located in the shell 100.

[0040] like Figure 1-Figure 16 As shown, the present application provides a thin film capacitor with high adaptability; specifically, the thin film capacitor may include a shell 100 and a capacitor core 200; wherein, the capacitor core 200 may be arranged inside the shell 100, and serve as the working body of the thin film capacitor, and may store and release electric charges, and the shell 100 may serve as the bearing body of the thin film capacitor, and is used to provide an installation position for the capacitor core 200, so as to carry and protect the capacitor core 200 and the cooling structure 102; an opening 101 is provided on one side of the shell 100, and when the thin film capacitor is assembled, the capacitor core 200 can be assembled into the shell 100 through the opening 101.

[0041] Since the film capacitor generates heat during operation and transfers the heat to the shell 100 so as to dissipate the heat through the shell 100, but the heat dissipation capacity of the shell 100 is poor, it is difficult for the film capacitor to achieve rapid cooling. By providing a cooling structure 102 on the outer wall of the shell 100 and utilizing the cooling structure 102 provided on the shell 100 to cool the shell 100, the heat transferred from the capacitor core 200 to the shell 100 can be promptly taken away, which is beneficial to reducing the temperature of the shell 100 and the capacitor core 200, preventing the capacitor core 200 from having an excessively high temperature and affecting its working efficiency, and providing a good working environment for the capacitor core 200.

[0042] As for the capacitor core 200, the capacitor core 200 is provided with a metal terminal 201 electrically connected to the capacitor core 200 and arranged in the housing 100. In order to achieve connection with an optional module other than the film capacitor, the metal terminal 201 can extend to the outside of the housing 100 through the opening 101, and the end of the metal terminal 201 away from the capacitor core 200 can be set in a bent shape to electrically connect with the optional module, or to reduce the shielding and obstruction of the metal terminal 201 by the optional module; illustratively, the optional module may include an electric drive module 550 and an installation portion The electric drive module 550 may include an IGBT module and a drive circuit board 720, and the mounting component may include a heat sink or a mounting shell 710; limited by factors such as the installation position of the film capacitor, the distribution of the metal terminal 201 and the connection form with the cooling structure 102, by setting the metal terminal 201 away from the capacitor core 200 and the connection terminal 202 in a bent shape, the connection difficulty between the film capacitor and the optional module can be reduced, the wiring path can be shortened, and the space occupied by the film capacitor can be controlled, which is conducive to improving the installation reliability and flexibility of the film capacitor.

[0043] In addition, during the use of film capacitors, since the layout requirements for film capacitors are high and they need to be used in conjunction with components other than film capacitors, in actual application, it is necessary to comprehensively consider factors such as the installation position of the film capacitor, the distribution of the metal terminal 201, and the connection form with the cooling structure 102; as for the film capacitor provided in the present application, it can include a positioning adjustment component, and before assembling the film capacitor, it is necessary to consider the combination of the optional module and the film capacitor to adjust the application direction of the metal terminal 201; therefore, before assembling the capacitor core 200, the positioning adjustment component provided in the shell 100 can be used to change the assembly position of the capacitor core 200, so that the capacitor core 200 can be detachably connected to one of the two inner side walls oppositely arranged in the shell 100 through the positioning adjustment component, so as to realize the pre-installation of the capacitor core 200, ensure the assembly accuracy of the capacitor core 200 and the shell 100 after packaging, and provide sufficient wiring space for the metal terminal 201, and can also adjust the application direction of the terminal 202 away from the capacitor core 200 with the metal terminal 201; such as Figure 1-Figure 3 As shown, when the capacitor core 200 is connected to different inner walls of the shell 100, the orientation of the terminal 202 of the metal terminal 201 located outside the shell 100 is different, thereby changing the application direction of the terminal 202, so that the thin film capacitor can adapt to more components according to actual conditions. For example, the metal terminal 201 can be electrically connected to the electric drive module 550 on the corresponding side through the terminal 202, or make way for the installation components of the corresponding layer; by applying the positioning and adjustment components, it is beneficial to improve the adaptability and compatibility of the thin film capacitor during the application process, broaden the application scope of the thin film capacitor, and be able to flexibly cope with controllers with large configuration differences and faster update frequencies, which is beneficial to reduce the design difficulty and production cost of the thin film capacitor and enhance the competitiveness of the enterprise in the capacitor market.

[0044] In addition, the film capacitor may also include a potting compound 400; Figure 1-Figure 4 As shown, the potting glue 400 can be filled in the shell 100 after the capacitor core 200 is assembled, and can fill and cover the inside of the shell 100; specifically, after the capacitor core 200 and the metal terminal 201 are installed on the inner wall of the shell 100, the potting glue 400 can be injected into the shell 100 through the opening 101 of the shell 100, so that the potting glue 400 covers the capacitor core 200, the positioning and adjustment components, and the metal terminal 201 located in the shell 100, and makes its surface flush with the edge of the opening 101; wherein, the potting glue 400 solidifies to form a blocking structure in the shell 100, and the blocking structure can fix and limit the capacitor core 200, the positioning and adjustment components, and the metal terminal 201, and can also insulate and protect the capacitor core 200 and the metal terminal 201, which is beneficial to improve the overall strength and service life of the thin film capacitor.

[0045] In some embodiments, the positioning and adjustment assembly includes a connecting structure 310, a positioning connecting column 320 and a positioning guide rail 330; the connecting structure 310 is located in the shell 100; the connecting structure 310 is arranged on the capacitor core 200; the positioning connecting column 320 is located in the shell 100; the positioning connecting column 320 and the connecting structure 310 are detachably connected; a plurality of positioning guide rails 330 are provided, and the extension directions of the plurality of positioning guide rails 330 are the same; the plurality of positioning guide rails 330 are respectively arranged on two inner side walls opposite to each other in the shell 100; the positioning guide rail 330 of one of the two inner side walls opposite to each other in the shell 100 is detachably connected to the positioning connecting column 320.

[0046] As for the positioning and adjustment components, Figure 2 , Figure 4 as well as Figure 5 As shown, by setting a positioning adjustment component between the housing 100 and the capacitor core 200, the capacitor core 200 can be connected to one of the two inner side walls oppositely arranged in the housing 100 to achieve pre-installation of the capacitor core 200, not only reserving sufficient wiring space for the metal terminal 201, but also adjusting the connection position of the capacitor core 200 and the housing 100, changing the application direction of the wiring terminal 202 of the metal terminal 201, so that the film capacitor can be adapted to more components based on the actual application environment, thereby enhancing the adaptability and Compatibility; wherein, the positioning and adjustment component may include a connecting structure 310, a positioning connecting column 320 and a positioning guide rail 330; the connecting structure 310 is arranged on the capacitor core 200, and the connecting structure 310 and the positioning connecting column 320 are both located in the shell 100 and are detachably connected, so that during the assembly of the capacitor core 200, the positioning connecting column 320 can be connected to the connecting structure 310 of the capacitor core 200, so as to further fix the capacitor core 200 to the inner wall of the shell 100 through the positioning connecting column 320.

[0047] In addition, the positioning and adjustment assembly further includes a plurality of positioning rails 330. Inside the housing 100, the plurality of positioning rails 330 may extend in the same direction and be arranged on two inner sidewall surfaces opposite to each other in the housing 100; for example, Figure 4 and Figure 7As shown, at least two groups of positioning rails 330 can be provided, and each group includes at least one positioning rail 330; wherein, for one of the two inner side walls relatively arranged in the shell 100, during the thin film capacitor assembly process, the extension directions of multiple groups of positioning rails 330 are the same, which is conducive to the smooth connection between the positioning connecting column 320 and the positioning rail 330, so that the capacitor core 200 is pre-installed on the inner side wall; specifically, since the positioning rail 330 of one of the two inner side walls relatively arranged in the shell 100 is detachably connected with the positioning rail 330 and the positioning connecting column 320, the end of the positioning connecting column 320 away from the capacitor core 200 can be slidably inserted into the positioning rail 330, so that the capacitor core 200 can be installed on one of the two inner side walls relatively arranged in the shell 100 by using the positioning adjustment component, so as to change the application direction of the metal terminal 201 away from the end of the capacitor core 200, so as to broaden the application range of the thin film capacitor.

[0048] In some embodiments, the connection structure 310 includes a fastening portion 311, a limiting portion 312 and a transition portion 313; the fastening portion 311 is arranged on the capacitor core 200 and surrounds a portion of the capacitor core 200; the two ends of the limiting portion 312 are respectively connected to the two ends of the fastening portion 311; the limiting portion 312 and the capacitor core 200 have a gap, and are configured to position the connecting column 320 to provide an installation position; the transition portion 313 is arranged on the limiting portion 312; the transition portion 313 is recessed toward the side close to the capacitor core 200, and the gap between the limiting portion 312 and the capacitor core 200 is divided into a plurality of plug-in channels 3101 by the transition portion 313.

[0049] As for the connection structure 310, the connection structure 310 can be fixedly connected to the surface of the capacitor core 200, and can be detachably connected to the positioning connection column 320, so that the capacitor core 200 can be installed on the positioning connection column 320; Figure 5 As shown, the connection structure 310 includes a fastening portion 311 and a limiting portion 312. The fastening portion 311 is at least partially arranged around the capacitor core 200, and the two ends of the fastening portion 311 are correspondingly connected to the two ends of the limiting portion 312 to form a ring, so that the connection structure 310 is fixedly sleeved on the capacitor core 200.

[0050] As for the limiting part 312, in addition to being connected to the fastening part 311, there is a gap between the side of the limiting part 312 close to the capacitor core 200 and the capacitor core 200. Since the capacitor core 200 is detachably connected to the positioning connecting column 320 through the connecting structure 310, the gap between the limiting part 312 and the capacitor core 200 can provide a corresponding installation position for the positioning connecting column 320, so that the positioning connecting column 320 can be plugged into the connecting structure 310 by plugging, thereby reducing the complexity of the connecting structure 310 and the difficulty of assembling the film capacitor; in addition, since the positioning connecting column 320 has a specified width and a specified width, the positioning connecting column 320 can be installed in the connecting structure 310. By setting a plurality of limiting portions 312 on the limiting portion 312 and making the transition portion 313 recessed toward the side close to the capacitor core 200, the transition portion 313 can separate the gap formed between the limiting portion 312 and the capacitor core 200 into a plurality of plug-in channels 3101, and make the shape of each plug-in channel 3101 match the cross-sectional shape of the positioning connecting column 320. After the positioning connecting column 320 is inserted into the plug-in channel 3101, the plug-in channel 3101 can limit the positioning connecting column 320, which is beneficial to improving the firmness and reliability of the connection between the positioning connecting column 320 and the connecting structure 310.

[0051] In addition, the capacitor core 200 is further explained in conjunction with the above-mentioned connecting portion; since the connecting structure 310 is arranged in a ring shape around the capacitor core 200, in order to further improve the firmness of the connecting structure 310 and the capacitor core 200, a limiting structure can be provided on the outer wall of the capacitor core 200. For example, a limiting groove (not marked in the figure) can be recessed on the outer wall of the capacitor core 200, or a limiting protrusion (not marked in the figure) can be formed by protrusion. When the limiting structure is a limiting groove, the fastening portion 311 and the limiting groove can be adapted and embedded in the limiting groove. When the limiting structure is a limiting protrusion, a plurality of limiting protrusions can be provided and located on opposite sides of the fastening portion 311, so as to limit the relative position of the fastening portion 311 and avoid positioning the connection. When the connecting column 320 is inserted into the connecting structure 310, the connecting structure 310 slips on the surface of the capacitor core 200, which is beneficial to ensure the firmness of the connection structure 310 installed on the capacitor core 200; in addition, a recessed portion (not marked in the figure) can be set below the limiting portion 312, and the recessed portion can be adapted to the transition portion 313, so that the portion of the transition portion 313 close to the capacitor core 200 is located in the recessed portion, so that the recessed portion can limit the transition portion 313, and when the positioning connecting column 320 is inserted into the plug-in channel 3101, the plug-in channel 3101 and the positioning connecting column 320 bracket are prevented from rubbing against each other to cause the limiting portion 312 to deform, so as to ensure the plug-in effect of the positioning connecting column 320 in the connecting structure 310.

[0052] In some embodiments, the connection structure 310 is formed of an elastic material, and the positioning connection column 320 is formed of an insulating material; specifically, since the connection structure 310 is annularly fixedly sleeved on the capacitor core 200, when the connection structure 310 is formed of an elastic material, the firmness of the connection structure 310 on the surface of the capacitor core 200 can be enhanced, which is conducive to improving the firmness of the positioning connection column 320 in the plug-in channel 3101; illustratively, the connection structure 310 can be formed of metal materials such as spring steel, phosphor bronze, brass or silver-plated copper, which has good elasticity. And it has high strength, ensuring the fixing effect of the connecting structure 310 on the capacitor core 200, and the connecting structure 310 on the positioning connecting column 320; in addition, when the limiting portion 312 of the connecting structure 310 is elastic, the limiting portion 312 can be slightly bent in the direction close to the capacitor core 200. When the positioning connecting column 320 is inserted into the plug-in channel 3101, the limiting portion 312 can press the positioning connecting column 320 through its slightly bent portion, which is beneficial to further improve the firmness of the connection of the positioning connecting column 320 in the plug-in channel 3101.

[0053] As for the positioning connecting column 320, when the connecting structure 310 is formed of an elastic material, the firmness of the connection between the connecting structure 310 and the positioning connecting column 320 can be improved. Since the capacitor core 200 is an electrical component, it is easy to short-circuit with a conductive component; therefore, by using an insulating material to form the positioning connecting column 320, a short-circuit between the positioning connecting column 320 and the capacitor core 200 can be avoided, and the positioning connecting column 320 can be avoided from interfering with the capacitor core 200; illustratively, the positioning connecting column 320 can be formed of materials such as polycarbonate, polyethylene terephthalate and polytetrafluoroethylene, which have good strength and heat resistance, which is beneficial to ensuring the connection effect between the capacitor core 200 and the inner wall of the shell 100, and ensuring the working performance of the capacitor core 200.

[0054] In some embodiments, a limiting groove 321 is provided on a side of the positioning connection column 320 away from the capacitor core 200 , and the limiting groove 321 is matched with the limiting portion 312 .

[0055] As for the positioning connecting column 320, since the positioning connecting column 320 is connected to the capacitor core 200 through the connecting structure 310, in order to further improve the firmness of the connection between the positioning connecting column 320 and the limiting portion 312 in the connecting structure 310, as shown in FIG. Figure 6As shown, a limiting groove 321 can be set on one side of the positioning connecting column 320. When the positioning connecting column 320 and the connecting structure 310 are in a plug-in state, the limiting groove 321 is set on the side of the positioning connecting column 320 away from the capacitor core 200, and the limiting groove 321 is adapted to the limiting portion 312, so that the limiting portion 312 of the connecting structure 310 can be inserted into the limiting groove 321, and the limiting groove 321 is used to limit the position of the limiting portion 312, so as to avoid misalignment or movement between the positioning connecting column 320 and the connecting structure 310 when the positioning connecting column 320 is inserted into the positioning slide groove, thereby affecting the installation effect of the capacitor core 200 in the shell 100.

[0056] In addition, the limiting groove 321 is further explained in combination with the above-mentioned embodiment; wherein, the cross-sectional shape of the limiting groove 321 can be set according to actual usage; exemplarily, the shape of the limiting groove 321 can be a rectangle, an isosceles trapezoid or a right-angled trapezoid; exemplarily, when the shape of the limiting groove 321 can be a right-angled trapezoid, the hypotenuse of the right-angled trapezoid can be set close to the capacitor core 200, which is beneficial to the plugging and unplugging and adjustment between the connecting structure 310 and the positioning connection, and its right-angled side can be set away from the capacitor core 200, and when the positioning connection column 320 is inserted into the positioning guide rail 330, it is beneficial to limit the position between the positioning connection column 320 and the limiting portion 312, thereby improving its installation reliability.

[0057] In some embodiments, the cross-section of the positioning guide rail 330 perpendicular to the extension direction of the positioning guide rail 330 is T-shaped or dovetail-shaped; the cross-sectional shape of the positioning connecting column 320 perpendicular to the extension direction of the positioning connecting column 320 is adapted to the shape of the cross-section of the positioning guide rail 330 perpendicular to the extension direction of the positioning guide rail 330.

[0058] As for the positioning rail 330, after the positioning connection column 320 is connected to the connection structure 310 on the capacitor core 200, the positioning connection column 320 needs to be inserted into the positioning rail 330 distributed on one of the two inner side walls oppositely arranged in the housing 100, so that the capacitor core 200 can be pre-installed on the surface of one of the two inner side walls oppositely arranged in the housing 100 through the positioning rail 330 and the positioning connection column 320, and the application direction of the connection terminal 202 of the metal terminal 201 can be adjusted; Figure 2 As shown, by matching the cross-sectional shape of the positioning connecting column 320 perpendicular to the extending direction of the positioning connecting column 320 with the cross-sectional shape of the positioning guide rail 330 perpendicular to the extending direction of the positioning guide rail 330, the stability and firmness of the positioning connecting column 320 inserted into the positioning guide rail 330 can be improved. Specifically, in order to reduce the difficulty and cost investment in preparing the positioning guide rail 330, the cross-sectional shape of the positioning guide rail 330 perpendicular to the extending direction of the positioning guide rail 330 can be set to a T-shape or a dovetail shape; for example, Figure 4 , Figure 7 as well as Figure 8 As shown, the cross-sectional shape of the positioning rail 330 may be T-shaped, so as to improve the limiting effect of the positioning rail 330 on the positioning connection column 320 and ensure the firmness of the capacitor core 200 pre-installed on the inner wall of the housing 100 .

[0059] In some embodiments, on one of the two inner side walls opposite to each other in the shell 100 , multiple groups of positioning guide rails 330 are evenly arranged along a direction perpendicular to the extension direction of the positioning guide rails 330 , and the number of positioning guide rails 330 is greater than or equal to the number of positioning connecting columns 320 .

[0060] Two inner side walls opposite to each other in the housing 100 are provided with positioning rails 330, so that the capacitor core 200 can be connected to one of the inner side walls through the positioning adjustment component. When the capacitor core 200 is pre-installed on different inner side walls in the housing 100, the application direction of the connection terminal 202 of the metal terminal 201 is also different, so as to improve the adaptability and compatibility of the film capacitor in the application process and be applicable to more installation situations; Figure 8 As shown, in one of the two inner side walls oppositely arranged in the housing 100, multiple groups of positioning rails 330 are evenly arranged along the extending direction perpendicular to the positioning rails 330, and the number of positioning rails 330 is greater than or equal to the number of positioning connecting posts 320, so that the pre-installed position of the capacitor core 200 on the same inner side wall surface can be changed, that is, when the positioning connecting posts 320 are plugged into different positioning rails 330, their connection positions on the inner side wall are also different; for example, as Figure 8 As shown, the arrangement direction of the multiple groups of positioning rails 330 is assumed to be the X direction. Since the number of positioning rails 330 is greater than or equal to the number of positioning connecting columns 320, when the positioning connecting columns 320 are connected to different positioning rails 330, the capacitor core 200 can adjust its installation position along the X direction, thereby changing the position of the metal terminal 201 located outside the shell 100, so that the metal terminal 201 can be better connected to the optional module through the terminal 202, thereby improving the reliability and stability of the connection.

[0061] In some embodiments, the positioning and adjustment component also includes an extension slide 340 and an adjustment slide rail 350; the extension slide 340 is arranged on the inner side wall of the shell 100; the extension direction of the extension slide 340 is cross-arranged with the extension direction of the positioning guide rail 330; the adjustment slide rail 350 is slidably arranged in the extension slide 340 and is adapted to the extension slide 340; the adjustment slide is fixedly connected to the positioning guide rail 330, and the length of the adjustment slide rail 350 is less than the length of the extension slide 340; the adjustment slide rail 350 is configured to adjust the position of the capacitor core 200 inside the shell 100, and is also configured to adjust the extension length of the metal terminal 201 outside the shell 100.

[0062] To further improve the compatibility and adaptability of film capacitors, Fig. 9 As shown, in addition to adjusting the position of the capacitor core 200 in the X direction, the position of the capacitor core 200 perpendicular to the X direction, that is, the position in the Y direction, can also be adjusted, so as to adjust the extension length of the metal terminal 201 outside the shell 100; specifically, the positioning adjustment component can also include an extension slide 340 and an adjustment slide rail 350, the extension slide 340 is arranged on the inner side wall of the shell 100, and its extension direction can be arranged crosswise with the extension direction of the positioning guide rail 330, the adjustment slide is fixedly connected to the positioning guide rail 330, and the length of the adjustment slide rail 350 is less than the length of the extension slide 340, so that the adjustment slide rail 350 can slide in the extension slide 340 to change the extension length of the positioning guide rail 330 in the shell. The position of the inner wall of the housing 100; illustratively, the extension slide 340 can be set at an angle to the X direction (for example, 5°-15°), and when the slide rail 350 is slidably adjusted along the extension slide 340, the position of the positioning guide rail 330 in the X direction and the Y direction changes to a certain extent, so that the two directions can be adjusted synchronously; wherein, the closer the positioning guide rail 330 is to the opening 101, and the closer the capacitor core 200 connected to the positioning guide rail 330 through the positioning connecting column 320 is to the opening 101, the longer the extension length of the metal terminal 201 outside the housing 100 is, so that the wiring terminal 202 of the metal terminal 201 can be adapted to more types of components to expand the application range of the film capacitor.

[0063] The positioning guide rail 330 is further explained in conjunction with the above-mentioned embodiment; in the present application, the extension length of the positioning guide rail 330 can be made greater than or equal to the length of the positioning connecting column 320. When the positioning connecting column 320 is inserted into the positioning guide rail 330, the capacitor core 200 can be installed on the inner wall of the shell 100 through the positioning connecting column 320, and the extension length of the metal terminal 201 can be changed by adjusting the insertion depth of the positioning connection in the positioning guide rail 330, so as to realize flexible adjustment of the thin film capacitor structure.

[0064] In some embodiments, the outer wall of the shell 100 is provided with a mounting surface 103, and the mounting surface 103 is recessed toward the capacitor core 200 and is provided with an assembly groove 104 that is compatible with the cooling structure 102; both the mounting surface 103 and the assembly groove 104 are provided with connecting holes 105, and the cooling structure 102 is connected to the assembly groove 104 through the connecting holes 105; the height of the assembly groove 104 is less than or equal to the thickness of the cooling structure 102.

[0065] As for the film capacitor, the outer wall of the film capacitor is provided with a cooling structure 102. When the film capacitor is in operation, the cooling structure 102 provided on the outer wall of the housing 100 can be used to cool the capacitor core 200 inside the housing 100 to avoid the problem of overheating of the film capacitor. When the film capacitor is used in combination with other optional modules, the cooling structure 102 can not only cool the film capacitor, but also exchange heat with the optional modules to improve the cooling efficiency of the cooling structure 102 on the capacitor module. Specifically, Figure 1-Figure 4 As shown, the outer wall of the shell 100 can be provided with a mounting surface 103, and the mounting surface 103 can be recessed on one side of the capacitor core 200 to provide an assembly groove 104 that is compatible with the cooling structure 102, and the cooling structure 102 can be accommodated through the assembly groove 104 to improve the compactness of the film capacitor.

[0066] As for the mounting surface 103 and the assembly groove 104, the mounting surface 103 and the assembly groove 104 are both provided with connecting holes 105. The optional module and the film capacitor can be assembled through the connecting holes 105 on the mounting surface 103 and the screw fasteners. The cooling structure 102 can be fixed in the assembly groove 104 through the connecting holes 105 in the assembly groove 104, so that the cooling structure 102 is located between the film capacitor and the optional module, which is beneficial to improve the cooling efficiency of the cooling structure 102; in addition, the height of the assembly groove 104 is less than or equal to the thickness of the cooling structure 102, ensuring that after the optional module is connected to the shell 100 of the film capacitor, the cooling structure 102 can be fully in contact with the film capacitor and the optional module respectively, that is, the cooling efficiency of the film capacitor is improved, and it can ensure the heat exchange effect of the optional module with the cooling structure 102.

[0067] In some embodiments, a cooling structure 102 is further provided on the outer wall of the thin film capacitor, and the cooling structure 102 includes a water-cooled plate 1021, and the water-cooled plate 1021 is provided on the outer wall of the shell 100; a first cooling surface and a second cooling surface are provided on opposite sides of the water-cooled plate 1021, and the first cooling surface is in contact with the outer wall of the shell 100 and is configured to cool the capacitor core 200 in the shell 100, and the second cooling surface is configured to exchange heat with the cooling medium in the water-cooled plate 1021.

[0068] By providing a cooling structure 102 on the outer wall of the housing 100, the heat transferred from the capacitor core 200 to the housing 100 can be taken away in time, which is conducive to the timely extraction of heat, so as to reduce the temperature of the housing 100 and the capacitor core 200 and provide a good working environment for the capacitor core 200; Figure 1-Figure 4 as well as Fig.11As shown, the cooling structure 102 may include a water-cooled plate 1021 disposed on one side of the shell 100, and a first cooling surface and a second cooling surface (neither marked in the figure) having a heat exchange function are disposed on opposite sides of the water-cooled plate 1021; when the thin film capacitor is cooled by the water-cooled plate 1021, since the first cooling surface is in contact with the outer wall of the shell 100, the thin film capacitor can be cooled by the first cooling surface, and the heat generated by the capacitor core 200 can be taken away in time to avoid the film capacitor from overheating; a second cooling surface is disposed on the side opposite to the first cooling surface, and for the thin film capacitor, the second cooling surface can exchange heat with the cooling medium in the water-cooled plate 1021, and can have different functions depending on the type of component.

[0069] For example, when the optional module is the electric drive module 550, the film capacitor can be electrically connected to the electric drive module 550 through the connection terminal 202 of the metal terminal 201, and the water cooling plate 1021 is located between the film capacitor and the electric drive module 550. Fig.10 , Fig.11 as well as Fig.16 As shown; at this time, the water-cooled plate 1021 can cool the thin film capacitor through the first cooling surface and cool the electric drive module 550 through the second cooling surface, thereby improving the cooling capacity of the water-cooled plate 1021 and contributing to the integration and miniaturization design of the module.

[0070] For example, when the optional module is a radiator, the water cooling plate 1021 and the housing 100 can be connected to the radiator through the connection hole 105, so that the second cooling surface is connected to the bottom surface of the radiator, as shown in FIG. Fig.13 and Fig.14 As shown; at this time, the water-cooled plate 1021 can cool the film capacitor through the first cooling surface, transfer the heat of the cooling medium to the radiator through the second cooling surface, and improve the heat dissipation capacity of the radiator through air cooling; it is beneficial to further improve the cooling capacity of the cooling structure 102.

[0071] In some embodiments, the second cooling surface is provided with a sealing groove 1025, and the sealing groove 1025 is matched with an external plate sealing ring 540; or a sealing plate 560 is provided on the side of the water-cooled plate 1021 away from the capacitor core 200, and the second cooling surface is provided on the side of the sealing plate 560 away from the capacitor core 200.

[0072] As for the film capacitor, when the water-cooled plate 1021 has an open flow channel, the cooling structure 102 can be in direct contact with the optional module, thereby enhancing the cooling effect on the optional module; the second cooling surface is provided with a sealing groove 1025, and the sealing groove 1025 is matched with an outer plate sealing ring 540; Figure 1-Figure 4 as well as Fig.11As shown, when the film capacitor is used in combination with the optional module, and the water-cooling plate 1021 is in direct contact with the optional module, the open portion of the water-cooling plate 1021 can be used as a part of the second cooling surface; by providing a sealing groove 1025 on the surface of the second cooling surface, and providing an external plate sealing ring 540 matched therewith in the sealing groove 1025, the sealing groove 1025 provides an installation position for the external plate sealing ring 540, and the external plate sealing ring 540 seals the water-cooling plate 1021 and the optional module to prevent the cooling medium in the water-cooling plate 1021 from leaking and affecting the normal use of the film capacitor and the optional module.

[0073] As for the film capacitor, when the optional module cannot be in direct contact with the cooling medium, a water cooling plate 1021 with a closed flow channel can be used; Fig.12 and Fig.13 As shown, a sealing plate 560 can be provided on a side of the water-cooled plate 1021 away from the capacitor core 200, so as to seal the open portion of the water-cooled plate 1021 through the sealing plate 560; at this time, the side of the sealing plate 560 away from the capacitor core 200 can be used as a second cooling surface, and when the cooling medium flows through the inside of the water-cooled plate 1021, the cooling medium can be blocked by the sealing plate 560 to prevent the cooling medium from directly contacting the optional module and causing damage to the optional module, while also ensuring the cooling effect of the cooling medium on the optional module.

[0074] In some embodiments, a cooling channel 1022 is disposed in the water-cooling plate 1021 ; a first port 1023 and a second port 1024 are disposed at opposite ends of the cooling channel 1022 , respectively, and the first port 1023 and the second port 1024 are both disposed on the water-cooling plate 1021 .

[0075] As for the cooling structure 102, the cooling structure 102 includes a water cooling plate 1021; that is, the present application can use liquid cooling to cool the film capacitor, so as to achieve the purpose of rapid cooling of the film capacitor; Figure 1-Figure 4 as well as Fig.11 As shown, a cooling channel 1022 is provided in the water-cooling plate 1021; a first port 1023 and a second port 1024 are respectively provided at opposite ends of the cooling channel 1022, and the first port 1023 and the second port 1024 are both provided on the water-cooling plate 1021. When cooling the thin film capacitor, one of the first port 1023 and the second port 1024 can be used as a liquid inlet port, and the other can be used as a liquid outlet port, and the cooling medium is transported in the order of the liquid inlet port, the cooling channel 1022 and the liquid outlet port through a circulating pump, and when the cooling medium flows in the cooling channel 1022, the heat generated by the thin film capacitor can be taken away by the continuously flowing cooling medium, so as to achieve the temperature control effect of the thin film capacitor.

[0076] In combination with the above embodiments, the cooling channel 1022 can be further explained, wherein a plurality of partition plates (not marked in the figure) can be set along the flow direction of the cooling channel 1022 to divide the cooling channel 1022 into a plurality of parallel sub-channels. The partition plates can play a role in stabilizing the flow to control the flow rate of the cooling medium in the cooling channel 1022, which is beneficial to improving the cooling capacity of the cooling structure 102 for the thin film capacitor.

[0077] Based on the same inventive concept, the present application also provides a power brick, which may include a thin film capacitor of the motor controller as above, and also includes an electric drive module 550; wherein the electric drive module 550 may include an IGBT module; the cooling structure 102 includes a water-cooled plate 1021, the water-cooled plate 1021 includes a first cooling layer 510 and a second cooling layer 520 stacked together, the first cooling layer 510 is located below the second cooling layer 520, and the first cooling layer 510 and the second cooling layer 520 are provided with a first cooling surface and a second cooling surface on opposite sides thereof, the thin film capacitor is cooled by the first cooling surface, and the electric drive module 550 is cooled by the second cooling surface; an inner plate sealing ring 530 is provided between the first cooling layer 510 and the second cooling layer 520, which is used to seal the water cooling channel formed between the first cooling layer 510 and the second cooling layer 520, thereby improving the sealing effect between the first cooling layer 510 and the second cooling layer 520.

[0078] It should be noted that if Fig.10 As shown, the water-cooled plate 1021 can adopt an open flow channel, that is, the second cooling plate of the water-cooled plate 1021 can be connected to the back of the electric drive module 550 through the sealing groove 1025 and the outer sealing ring 540 of the plate, thereby forming a closed cooling flow channel, so that the cooling medium directly cools the electric drive module 550; or Fig.11 As shown, the water-cooled plate 1021 adopts a closed flow channel, that is, the top of the second cooling layer 520 can be connected to a blocking plate 560, and the blocking plate 560 can form a closed cooling channel 1022 between the first cooling layer 510 and the second cooling layer 520 arranged in the shell 100, so that the cooling medium can cool the electric drive module 550 through the blocking plate 560 to prevent the cooling medium from affecting the performance of the electric drive module 550.

[0079] Based on the same inventive concept, the present application also provides a capacitor module with air cooling and heat dissipation, which includes not only the film capacitor of the motor controller mentioned above, but also a radiator; Fig.13 and Fig.14As shown, the radiator may include a mounting plate 610 and fins 620 arranged on the mounting plate 610 away from the film capacitor, so as to increase the heat dissipation area and improve the heat dissipation effect; wherein, a heat-conducting copper tube or a silicone grease layer may be arranged between the mounting plate 610 and the water-cooled plate 1021, which is beneficial to improve the heat conductivity between the water-cooled plate 1021 and the radiator; specifically, when the capacitor module is running, the film capacitor may transfer heat to the cooling medium, and the cooling medium may take away part of the heat during the flow process, and transfer part of the heat to the radiator, so as to dissipate the heat to the external environment through the fins 620 of the radiator; in addition, in order to further improve the heat dissipation effect of the capacitor module, an additional cooling fan (not marked in the figure) may be arranged, and the cooling fan may be used to accelerate the flow speed of the air around the fins 620, so as to further increase the heat dissipation effect of the capacitor module.

[0080] Based on the same inventive concept, the present application also provides a motor controller, such as Fig.15 and Fig.16 As shown; wherein, the controller includes the above-mentioned thin film capacitor, and also includes a mounting shell 710 and a driving circuit board 720; wherein, the driving circuit board 720 can be arranged in the mounting shell 710, the thin film capacitor can be connected to the mounting shell 710 and located above the driving circuit board 720, and the cooling structure 102 is located between the driving circuit board 720 and the thin film capacitor; at this time, the water cooling structure can cool the driving circuit board 720 and the thin film capacitor at the same time through the first cooling surface and the second cooling surface; at the same time, in order to facilitate the connection between the thin film capacitor and other electric drive modules 550, the wiring terminal 202 of its metal terminal 201 can be arranged toward the side away from the driving circuit board 720, so as to improve the rationality of the distribution of the thin film capacitor inside the mounting shell 710, improve the space utilization inside the controller, and be conducive to the miniaturization and integrated design of the controller.

[0081] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0082] The various embodiments in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0083] The description of the present application is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present application to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present application, and to enable those of ordinary skill in the art to understand the present application and thus design various embodiments with various modifications suitable for specific purposes.

[0084] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0085] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0086] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A film capacitor for a motor controller, characterized in that: include: A shell, wherein the shell is respectively provided with an opening and a cooling structure; A capacitor core is arranged in the housing; the capacitor core is provided with a metal terminal, the metal terminal extends to the outside of the housing through the opening, and a bent terminal is arranged at one end of the metal terminal away from the capacitor core; A positioning adjustment component is located in the housing; the capacitor core is detachably connected to one of two inner side walls oppositely arranged in the housing through the positioning adjustment component, and is configured to adjust the application direction of the metal terminal away from one end of the capacitor core; A potting compound is filled in the shell; the potting compound covers the capacitor core, the positioning adjustment component and the part of the metal terminal located in the shell respectively.

2. The motor controller film capacitor according to claim 1, characterized in that: The positioning adjustment component comprises: A connection structure is located in the housing; the connection structure is arranged on the capacitor core; A positioning connection column is located in the housing; the positioning connection column and the connection structure are detachably connected; Multiple groups of positioning guide rails, extending in the same direction; multiple groups of positioning guide rails are respectively arranged on two inner side walls opposite to each other in the shell; the positioning guide rail on one of the two inner side walls opposite to each other in the shell is detachably connected to the positioning connecting column.

3. The motor controller film capacitor according to claim 2, characterized in that: The connection structure comprises: A fastening portion, disposed on the capacitor core and surrounding a portion of the capacitor core; A limiting part, two ends of which are respectively connected to two ends of the fastening part; a gap is formed between the limiting part and the capacitor core, and the limiting part is configured to provide an installation position for the positioning connecting column; a limiting groove is provided on a side of the positioning connecting column away from the capacitor core, and the limiting groove is adapted to the limiting part; A transition portion is arranged on the limiting portion; the transition portion is recessed toward a side close to the capacitor core, and the transition portion divides the gap between the limiting portion and the capacitor core into a plurality of plug-in channels.

4. The motor controller film capacitor according to claim 3, characterized in that: The cross section of the positioning rail perpendicular to the extension direction of the positioning rail is T-shaped or dovetail-shaped; the cross section shape of the positioning connecting column perpendicular to the extension direction of the positioning connecting column is adapted to the cross section shape of the positioning rail perpendicular to the extension direction of the positioning rail.

5. The motor controller film capacitor according to claim 3, characterized in that: On one of the two inner side walls oppositely arranged in the shell, a plurality of groups of the positioning guide rails are evenly arranged along a direction perpendicular to the extension direction of the positioning guide rails, and the number of the positioning guide rails is greater than or equal to the number of the positioning connection columns.

6. The motor controller film capacitor according to claim 3, characterized in that: The positioning adjustment component also includes: An extension slideway is arranged on the inner side wall of the housing; an extension direction of the extension slideway is arranged to intersect with an extension direction of the positioning guide rail; An adjusting slide rail is slidably arranged in the extension slide and adapted to the extension slide; the adjusting slide rail is fixedly connected to the positioning guide rail, and the length of the adjusting slide rail is smaller than the length of the extension slide rail; the adjusting slide rail is configured to adjust the position of the capacitor core inside the shell, and is also configured to adjust the extension length of the metal terminal outside the shell.

7. The motor controller film capacitor according to claim 1, characterized in that: The outer side wall of the shell is provided with a mounting surface, and the mounting surface is recessed toward the capacitor core and provided with an assembly groove adapted to the cooling structure; both the mounting surface and the assembly groove are provided with connecting holes, and the cooling structure is connected to the assembly groove through the connecting holes; the height of the assembly groove is less than or equal to the thickness of the cooling structure.

8. The motor controller film capacitor according to claim 1, characterized in that: The cooling structure includes: A water-cooling plate is arranged on the outer wall of the shell; a first cooling surface and a second cooling surface are arranged on opposite sides of the water-cooling plate, the first cooling surface is in contact with the outer wall of the shell and is configured to cool the capacitor core in the shell; the second cooling surface is configured to exchange heat with the cooling medium in the water-cooling plate.

9. The motor controller film capacitor according to claim 8, characterized in that: The second cooling surface is provided with a sealing groove, and an outer plate sealing ring matched with the sealing groove is provided in the sealing groove; or A sealing plate is arranged on a side of the water cooling plate away from the capacitor core, and the second cooling surface is arranged on a side of the sealing plate away from the capacitor core.

10. The motor controller film capacitor according to claim 1, characterized in that: A cooling channel is arranged in the water cooling plate; a first port and a second port are arranged at opposite ends of the cooling channel, respectively, and the first port and the second port are both arranged on the water cooling plate.

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