Motor controller capacitor

Abstract

The invention provides a motor controller capacitor. The motor controller capacitor comprises a shell with a cavity and an opening which are communicated with each other, a capacitor core located in the cavity, pouring sealant which is filled in the cavity and covers the capacitor core, and a driving board which covers the opening and is electrically connected with the driving board, the shielding plate is located between the capacitor core and the driving plate and is at least partially located in the cavity; the shielding plate comprises a plurality of wave crest parts which are connected in sequence and protrude towards the direction close to the driving plate, and at least part of the wave crest parts abut against the surface of the driving plate; a concave part is formed by two adjacent wave crest parts, the concave part is embedded in the pouring sealant, and a gap is formed between the concave part and the capacitor core; by adopting the shielding plate with the plurality of wave crest parts, the convection heat exchange area between the shielding plate and air can be increased, the heat dissipation effect of the capacitor core is improved, and the working performance of the controller capacitor is guaranteed.

Description

Technical Field

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

[0002] Controller capacitor is an important component of the motor controller, used to maintain the stability and reliability of the electric drive system operation, and is widely used in vehicles and other fields.

[0003] Limited by the size of the controller capacitor and its distribution position in the shell, the capacitor core in the related technology has a large ESR (Equivalent Series Resistanc) and causes a significant thermal effect; since the capacitor core is encapsulated in the shell by potting glue, the heat generated by the capacitor core during operation usually depends on the convection heat exchange between the shell and the external environment, resulting in weak heat dissipation capacity of the controller capacitor, which is not conducive to the continuous and stable operation of the controller capacitor. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a motor controller capacitor to solve some or all of the above-mentioned technical problems.

[0005] Based on the above purpose, the present application provides a motor controller capacitor, including:

[0006] A shell body, wherein the shell body has a cavity therein, and a side wall of the shell body is provided with an opening communicating with the cavity;

[0007] A capacitor core, wherein the capacitor core is located in the cavity;

[0008] A potting compound, wherein the potting compound is filled in the cavity and covers the capacitor core;

[0009] a driving plate, the driving plate covering the opening and connected to the housing;

[0010] A shielding plate, the shielding plate is located between the capacitor core and the driving plate, the positive projection of the capacitor core on the shielding plate is located inside the shielding plate, at least a portion of the shielding plate is located in the cavity and is electrically connected to the driving plate;

[0011] Among them, the shielding plate includes a plurality of crests connected in sequence, the crests protrude in the direction close to the driving plate, and at least part of the crests abut against the surface of the driving plate; a recess is formed between two adjacent crests, the recess is embedded in the potting glue and there is a gap between the recess and the capacitor core.

[0012] From the above description, it can be seen that the motor controller capacitor provided in the present application, the shielding plate of the motor controller has a plurality of crests connected in sequence, and a recessed portion is formed between adjacent crests and embedded in the potting glue, so that the capacitor core can transfer heat to the shielding plate through the potting glue; due to the presence of the crests, a plurality of heat exchange spaces can be formed between the capacitor core and the driving board, and the heat exchange area of ​​the shielding plate is increased, thereby enhancing the convective heat exchange effect between the capacitor core and the air, which is beneficial to improving the dissipation efficiency and heat dissipation performance of the controller capacitor, so as to ensure the stability of the operation of the controller capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

[0014] Figure 1 It is a schematic diagram of the structure of the controller capacitor in this application;

[0015] Figure 2 is a cross-sectional view of a controller capacitor in this application;

[0016] Figure 3 This is an exploded diagram of the controller capacitor in this application;

[0017] Figure 4 It is a partial enlarged view of the shielding plate in this application;

[0018] Figure 5 This is a schematic diagram of the assembly of the grounding terminal plate outside the shell in this application.

[0019] Description of reference numerals:

[0020] 1. Shell; 1-1. Cavity; 1-2. Opening; 1-3. Wiring seat; 1-4. Limiting plate; 1-5. Wiring hole; 1-6. Fitting groove;

[0021] 2. Capacitor core; 2-1. First wiring row; 2-2. Second wiring row; 2-3. Second bending portion;

[0022] 3. Potting glue;

[0023] 4. Driver board;

[0024] 5. Shielding plate; 5-1. Wave crest portion; 5-1-1. Concave portion; 5-2. Spring piece; 5-3. Grounding terminal plate; 5-3-1. First bending portion; 5-3-2. Positioning portion;

[0025] 6. Support column; 6-1. Connecting column; 6-2. Limiting part; DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0029] For the controller capacitor of the electric drive system, the main control board can be stacked on the shell surface of the controller capacitor to improve the compactness of the motor controller structure. The main control board is generally composed of driver boards such as PCBA (Printed Circuit Board Assembly, a printed circuit board with completed electronic component welding and installation). In order to prevent the driver board from generating electromagnetic interference to the capacitor core of the capacitor and ensure the stable operation of the controller capacitor, it is necessary to add a thicker shielding plate between the driver board and the capacitor core to ensure the shielding effect of the shielding plate on the capacitor core.

[0030] In addition, due to the limited internal space of the vehicle, the size of the controller capacitor needs to strictly follow the overall layout requirements, and the size of the controller capacitor shell and the capacitor core located in the shell will also be limited, resulting in a relatively high ESR of the controller capacitor; more specifically, a higher ESR not only increases the energy loss of the controller capacitor, but also generates more heat during high-frequency operation, causing the controller capacitor to heat up too quickly. The capacitor core is usually encapsulated with potting glue. When the capacitor core is heated, the heat is transferred to the shell through the potting glue, and then the shell dissipates the heat to the external environment, that is, the heat is dissipated by natural convection; however, it is difficult to effectively control the temperature rise rate of the controller capacitor by using natural convection heat dissipation. Therefore, the heat dissipation capacity of the controller capacitor is relatively weak, and the heat dissipation efficiency is relatively low, which is not conducive to maintaining the stable operation of the controller capacitor.

[0031] In order to solve the heat dissipation problem of the controller capacitor, a heat-conducting medium can be introduced into the shell of the controller capacitor, or auxiliary heat dissipation measures such as fans can be added. The heat generated by the capacitor core can be dissipated through the heat-conducting medium and auxiliary heat dissipation measures, thereby improving the heat dissipation efficiency of the controller capacitor. However, the introduction of a heat-conducting medium will increase the preparation materials and processes of the controller capacitor, further increasing the complexity and cost of the controller capacitor assembly; at the same time, over-reliance on external heat dissipation measures will cause unnecessary energy waste and reduce the cost-effectiveness of the motor controller.

[0032] In view of this, the present application provides a motor controller capacitor with low cost and good heat dissipation performance, the controller capacitor comprises a housing 1, a capacitor core 2, a potting glue 3, a driving board 4 and a shielding board 5, Figure 1-Figure 5 The display content elaborates on the controller capacitor.

[0033] For the controller capacitor, if Figure 2 and Figure 3 As shown, a cavity 1-1 is provided in the shell 1, an opening 1-2 connected to the cavity 1-1 is provided on the side wall of the shell 1, a capacitor core 2 is located in the cavity 1-1, a potting compound 3 is filled in the cavity 1-1 and covers the capacitor core 2, a driving board 4 covers the opening 1-2 and is connected to the shell 1; a shielding plate 5 is located between the capacitor core 2 and the driving board 4, an orthographic projection of the capacitor core 2 on the shielding plate 5 is located in the shielding plate 5, at least a portion of the shielding plate 5 is located in the cavity 1-1 and is electrically connected to the driving board 4; the shielding plate 5 includes a plurality of sequentially connected crest portions 5-1, the crest portions 5-1 are protruding in a direction close to the driving board 4, and at least a portion of the crest portions 5-1 abuts against the surface of the driving board 4; a recessed portion 5-1-1 is formed between two adjacent crest portions 5-1, and a gap is formed between the recessed portion 5-1-1 embedded in the potting compound 3 and with the capacitor core 2.

[0034] like Figure 1-Figure 3As shown, the shell 1 of the controller capacitor can be used as its main carrier; the shell 1 has a cavity 1-1 for accommodating and protecting electrical components such as the capacitor core 2, so as to isolate the capacitor core 2 from the external environment and provide a good insulation environment for it; the side wall of the shell 1 is provided with an opening 1-2 connected to the cavity 1-1, which can be used as a factory assembly channel for the product; for different application scenarios, if it is necessary to establish an electrical connection between the driving board 4 outside the shell 1 and the capacitor core 2 inside the shell 1, a local electrical connection between the two can also be achieved through the opening 1-2.

[0035] For example, the housing 1 may be formed of materials such as polycarbonate, nylon, polyphenylene sulfide, and polyetheretherketone, which have good mechanical properties, electrical insulation properties, and high temperature resistance, and will not be described in detail here.

[0036] For capacitor core 2, if Figure 2 and Figure 3 As shown, the capacitor core 2 is located in the cavity 1-1, and is used as the main component of the controller capacitor to store the charge transmitted by the circuit structure connected to it, and to stabilize the voltage of the circuit structure or filter out current fluctuations by accumulating and releasing electrical energy.

[0037] For potting glue 3, such as Figure 2 As shown, when assembling the controller capacitor, the potting glue 3 in a fluid state can be filled into the shell 1 from the opening 1-2 of the shell 1, so that the potting glue 3 fills the cavity 1-1 and covers the capacitor core 2; after the potting glue 3 solidifies, it can not only realize the positioning and fixation of the capacitor core 2, but also play the role of insulation protection for the capacitor core 2.

[0038] Exemplarily, the potting glue 3 can be formed of materials with good electrical insulation performance and thermal stability, such as epoxy resin, silicone resin, polyurethane, acrylic resin, polyamide and polyimide, which will not be elaborated here.

[0039] For the driver board 4, Figure 1-Figure 3 As shown, the driving board 4 can be used as the main control unit of the controller capacitor to adjust the working state of the capacitor to ensure that the motor controller can maintain efficient and stable operation of the electric drive system; more specifically, since the driving board 4 covers the opening 1-2 of the shell 1 and is connected to the shell 1, on the one hand, the structure of the controller capacitor can be made more compact, and on the other hand, the driving board 4 can block the opening 1-2 of the shell 1, thereby forming effective protection for the electrical components arranged in the cavity 1-1.

[0040] Exemplarily, the driving board 4 can select different types of driving boards 4 according to the application scenarios of the controller capacitor and user needs, which will not be elaborated here.

[0041] For the shielding plate 5, if Figure 2 and Figure 3As shown, by arranging the shielding plate 5 between the capacitor core 2 and the driving plate 4, the driving plate 4, the shielding plate 5 and the capacitor core 2 form a stacked structure from top to bottom, thereby realizing a compact design of the controller capacitor; the positive projection of the capacitor core 2 on the shielding plate 5 is located inside the shielding plate 5, so that the shielding plate 5 can effectively shield the capacitor core 2, thereby forming a shielding field with a good shielding effect above the capacitor core 2, reducing the electromagnetic interference of the driving plate 4 on the capacitor core 2, so as to ensure the stability of the operation of the capacitor core 2.

[0042] In addition, at least a portion of the shielding plate 5 is located in the cavity 1-1 and is electrically connected to the driving plate 4, so that the shell 1 can effectively protect the shielding plate 5; and because there is an electrical connection between the shielding plate 5 and the driving plate 4, when there is electrostatic charge on the driving plate 4, the electrostatic charge generated by the driving plate 4 can be discharged through the shielding plate 5, thereby increasing the discharge path of the electrostatic charge in the driving plate 4, so that the controller capacitor has a good grounding effect, avoiding excessive accumulation of electrostatic charge in the driving plate 4 and causing electrostatic breakdown and other faults, and at the same time, at least part of the grounding wire can be omitted, thereby improving the simplicity and investment cost of the controller capacitor.

[0043] More specifically, Figure 2 , Figure 3 and Figure 5 As shown, the shielding plate 5 includes a plurality of sequentially connected wave crest portions 5-1, and each wave crest portion 5-1 protrudes toward the direction close to the driving plate 4, so that the driving plate 4 forms a wavy structure, that is, the wave plate still has a corresponding height in the vertical direction, which can reduce the overall thickness of the shielding plate 5 while ensuring the shielding effect; at least part of the wave crest portion 5-1 abuts against the surface of the driving plate 4 and is electrically connected to the driving plate 4, which can achieve effective support for the driving plate 4 and improve the stability of the driving plate 4; it can also constitute the grounding structure of the driving plate 4, thereby smoothly conducting the electrostatic charge in the driving plate 4.

[0044] In addition, if Figure 2-Figure 4 As shown, a recessed portion 5-1-1 is formed between two adjacent peak portions 5-1, and the recessed portion 5-1-1 is embedded in the potting glue 3, so as to fix the shielding plate 5 through the potting glue 3 in the cavity 1-1, thereby improving the stability and firmness of the shielding plate 5 installed in the shell 1; there is a gap between the recessed portion 5-1-1 and the capacitor core 2, so that the shielding plate 5 and the capacitor core 2 are not in contact, thereby avoiding short-circuiting of the capacitor core 2 and damaging the controller capacitor.

[0045] Furthermore, when the controller capacitor is used in a dry, low-humidity environment, or when the processes of mixing, pouring, and curing of the potting glue 3 involve rapid flow or friction, there may be a risk of electrostatic charge accumulation in the potting glue 3; therefore, after the recessed portion 5-1-1 is embedded in the potting glue 3, the electrostatic charge in the potting glue 3 can also be discharged through the shielding plate 5, which can prevent the electrostatic charge from accumulating in the potting glue 3, thereby providing a good operating environment for the capacitor core 2.

[0046] Furthermore, if Figure 2 As shown, since the shielding plate 5 has multiple peaks 5-1, the surface area of ​​the shielding plate 5 between the capacitor core 2 and the driving plate 4 can be increased, and multiple heat exchange spaces can be formed between the capacitor core 2 and the driving plate 4; since the shielding plate 5 is embedded in the potting glue 3 by forming a recessed portion 5-1-1 between adjacent peaks 5-1, during the operation of the controller capacitor, the heat generated by the capacitor core 2 can be radiated to the external environment through the shell 1, and can also be transferred to the shielding plate 5 through the potting glue 3; due to the presence of the peaks 5-1, the contact area between the shielding plate 5 and the air is increased, that is, the heat exchange area is increased, thereby enhancing the convective heat exchange effect between the controller capacitor and the air, thereby improving the heat dissipation efficiency and heat dissipation performance, which is beneficial to improving the stability of the controller capacitor operation.

[0047] Exemplarily, the shielding plate 5 can be formed into a plurality of sequentially connected crest portions 5 - 1 by stamping, which has excellent forming effect and simple process, and is beneficial to controlling the cost investment of the controller capacitor.

[0048] Exemplarily, the shielding plate 5 can be formed of materials with good rigidity and stable performance, such as copper alloy, aluminum alloy, silicon steel and cold-rolled steel, which will not be described in detail here.

[0049] In some embodiments, the shielding plate 5 includes a plurality of crest portions 5-1 connected in sequence. Figure 2-Figure 4 As shown, the extension directions of any two wave crest portions 5-1 are parallel to each other, and the arrangement direction of the plurality of wave crest portions 5-1 is perpendicular to the extension direction of the wave crest portions 5-1; this is conducive to processing the shielding plate 5 through a stamping process, thereby reducing the difficulty of preparing the shielding plate 5, so that the shielding plate 5 with a larger area can be integrated into the shell 1, so that it can not only provide good support for the driving plate 4, but also form a stable connection relationship with the potting glue 3, which is conducive to improving the adaptability of the electrode controller to complex environments (such as scenes with severe vibration or large amplitude).

[0050] Since the driving plate 4 and the shielding plate 5 of the original controller capacitor are fixed on the shell 1 in a stacked form, the heat exchange area between the shielding plate 5 and the air is limited, and the shielding is difficult to play a heat dissipation role, so the heating speed is relatively fast, and the shielding plate 5 is prone to expansion and deformation after being heated. In severe cases, it will also cause obvious deformation of the driving plate 4 (such as bulging or bending problems); relative to the original controller capacitor, the shielding plate 5 of the controller capacitor provided in the present application includes a plurality of sequentially connected crests 5-1, the extension directions of any two crests 5-1 are parallel to each other, and the arrangement directions of the plurality of crests 5-1 are perpendicular to the extension directions of the crests 5-1, that is, the shielding plate 5 has a wavy structure. When the temperature of the shielding plate 5 is high and expansion occurs, there is a reserved space between adjacent crests 5-1, which can make the adjacent crests 5-1 close to each other and compressed, which can reduce the stress applied by the shielding plate 5 to the driving plate 4, thereby solving the problem of heat deformation of the shielding plate 5, which is conducive to ensuring the flatness of the driving plate 4 and reducing the stress level of the driving plate 4.

[0051] In some embodiments, Figure 2 , Figure 3 as well as Figure 5 As shown, a spring sheet 5-2 for supporting the driving plate 4 is provided on one side of the crest portion 5-1 close to the driving plate 4. Since the spring sheet 5-2 is elastic, it can buffer the driving plate 4 under bumpy conditions, reduce the impact of the external complex environment on the driving plate 4, and thus avoid damage to the driving plate 4.

[0052] More specifically, since the spring clip 5-2 is elastic, it abuts against the side of the driving plate 4 close to the capacitor core 2, ensuring that the driving plate 4 can maintain contact with the spring clip 5-2 even under bumpy conditions, so that the electrostatic charge in the driving plate 4 is introduced into the shielding plate 5 through the spring clip 5-2 and then exported to the external environment; in addition, the spring clip 5-2 can be configured to first extend in the direction close to the driving plate 4 and then bend in the arrangement direction of the multiple peaks 5-1, that is, the spring clip 5-2 is configured in an inverted "L" shape, which can increase the contact area between the spring clip 5-2 and the driving plate 4, which is beneficial to improving its support effect on the driving plate 4 and the electrostatic export effect.

[0053] Exemplarily, the spring piece 5 - 2 can be formed by stamping technology, that is, the spring piece 5 - 2 and the shielding plate 5 are integrally connected, which can reduce the difficulty of making the spring piece 5 - 2, make it have good elasticity, and maintain a good connection effect with the shielding plate 5.

[0054] As a replaceable embodiment, an embedded part (not marked in the figure) can be extended in the recessed portion 5-1-1 in a direction away from the driving plate 4. The embedded part is integrally connected to the shielding plate 5 and has no electrical connection with the capacitor core 2, thereby avoiding a short circuit between the shielding plate 5 and the capacitor core 2. Among them, by adding embedded parts, the firmness of the connection between the shielding plate 5 and the potting glue 3 can be further improved. At the same time, the embedded parts can also be buried in the area of ​​the potting glue 3 where electrostatic charges are easily accumulated, so as to reduce the accumulation degree of electrostatic charges in the potting glue 3.

[0055] In some embodiments, a window area is provided on one side of the driving board 4 close to the capacitor core 2 , and the spring 5 - 2 abuts against the surface of the window area to electrically connect the driving board 4 to the shielding plate 5 .

[0056] Specifically, since the driving board 4 is composed of PCBA, the driving board 4 has a grounding layer formed by copper foil inside the board; therefore, by scraping off the welding green oil on the side of the driving board 4 close to the capacitor core 2, the driving board 4 can expose the grounding layer, that is, a window area (not marked in the figure) is formed on the side of the driving board 4 close to the capacitor core 2. When the spring piece 5-2 abuts against the surface of the window area, the conductive layer of the driving board 4 will be electrically connected to the shielding plate 5, so that the shielding plate 5 can be used to conduct the electrostatic charge in the driving board 4 to increase the conduction path of the electrostatic charge of the driving board 4, so as to provide a good working environment for the capacitor core 2.

[0057] In some embodiments, the motor controller capacitor further includes a plurality of support columns 6, specifically as follows: Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown; wherein, the extension direction of each support column 6 is the same as the protruding direction of the crest portion 5-1 of the shell 1, and is used to support the drive plate 4.

[0058] Specifically, Figure 3 As shown, the support column 6 may include two parts, one part of the support column 6 is connected to the inner bottom wall of the shell 1 and passes through the capacitor core 2 and the shielding plate 5, which can be used to position the capacitor core 2 and the shielding plate 5, improve the installation efficiency between the two, and reduce the installation difficulty, and at the same time can also form an effective support for the middle area of ​​the driving board 4; and one part of the support column 6 is connected to the side wall of the shell 1 and distributed along its periphery, which can form an effective support for the peripheral area of ​​the driving board 4, ensuring that the driving board 4 has good flatness and preventing the driving board 4 from having quality problems such as warping.

[0059] In addition, if Figure 2As shown, the shell 1 can be connected to the driving board 4 through the support column 6, so that the shell 1 and the driving board 4 have good integrity; and in the protruding direction of the crest part 5-1, there is a gap between the opening 1-2 and the driving board 4, that is, the end of the support column 6 can extend to the top of the opening 1-2 of the shell 1. Since the shielding plate 5 of the controller capacitor can assist in heat dissipation of the capacitor core 2, when there is a gap between the controller opening 1-2 and the driving board 4, the air in the external environment can circulate through the gap between the driving board 4 and the opening 1-2 to ensure that the heat dissipated by the shielding plate 5 in the cavity 1-1 of the shell 1 can be dissipated to the external environment in time, avoiding heat accumulation in the shell 1 and affecting the heat dissipation effect of the controller capacitor, and there is no need to open a heat dissipation window on the side wall of the shell 1 to ensure the integrity and application strength of the shell 1.

[0060] Exemplarily, the support column 6 and the shell 1 may be formed by an integral molding process to ensure the connection strength between the support column 6 and the shell 1 , which will not be described in detail herein.

[0061] In some embodiments, Figure 1-Figure 3 and Figure 5 As shown, the end of the support column 6 is provided with a connecting column 6-1 that passes through the drive plate 4. When the drive plate 4 is assembled to the shell 1, the connecting column 6-1 at the end of the support column 6 can pass through the through hole opened in the drive plate 4, so that the drive plate 4 is installed on the end of the support column 6; since the outer diameter of the connecting column 6-1 is smaller than the outer diameter of the support column 6, the end face of the top of the support column 6 can limit the position of the drive plate 4, and then a gap is formed between the drive plate 4 and the plane where the opening 1-2 of the shell 1 is located, so that the heat inside the shell 1 can be dissipated in time.

[0062] Furthermore, if Figure 1 and Figure 2 As shown, after the drive board 4 is installed on the connecting column 6-1, the end of the connecting column 6-1 away from the capacitor core 2 can be processed through a hot melt process, so that the connecting column 6-1 is hot-melted and deformed at the end away from the capacitor core 2 to form a limiting portion 6-2 for fixing the drive board 4, thereby achieving the fixation of the drive board 4; while the controller capacitor in the related technology has a thicker thickness of the shielding plate 5, and fasteners such as screws are required to effectively fix the drive board 4; therefore, compared with the original controller capacitor, the controller capacitor provided in the present application can eliminate fasteners such as screws, reduce production costs, and also reduce the risk of short-circuiting the drive board 4 when conductors in the external environment come into contact with the screws, thereby improving the safety of the controller capacitor.

[0063] In some embodiments, the shielding plate 5 can be electrically connected to the window area of ​​the shielding plate 5 through the spring piece 5-2 provided on the crest portion 5-1, so as to conduct the electrostatic charge in the shielding plate 5; therefore, for the shielding plate 5, Figure 2-Figure 5As shown, the shielding plate 5 is connected to a grounding terminal plate 5-3 for conducting away the electrostatic charge inside the shielding plate 5. Since there is a gap between the opening 1-2 of the shell 1 and the driving plate 4, the driving plate 4 is close to the opening 1-2 of the shell 1. The grounding terminal plate 5-3 can extend from the inside of the shell 1 through the opening 1-2 to the outside of the shell 1 to avoid damage to the shell 1, so as to ensure the overall strength of the shell 1. At the same time, the hole opening process in the shell 1 is omitted, which can reduce the cost investment of the controller capacitor.

[0064] More specifically, if 2 and Figure 4 As shown, the grounding terminal plate 5-3 is provided with a first bending portion 5-3-1 for avoiding the side wall of the shell 1, and the first bending portion 5-3-1 is bent in the direction close to the driving plate 4; therefore, for the terminal plate, the terminal plate can not only extend to the outside of the shell 1 without opening a hole in the side wall of the shell 1 to realize the extraction of electrostatic charge, but also the grounding terminal plate 5-3 can be set close to the side wall of the shell 1, and the shielding plate 5 can be clamped to the side wall of the shell 1 through the first bending portion 5-3-1 on the grounding terminal plate 5-3, thereby improving the firmness of the shielding plate 5 installed in the shell 1.

[0065] Exemplarily, the grounding terminal plate 5 - 3 and the shielding plate 5 may be formed by an integrated molding process to ensure the effect of conducting away the electrostatic charge in the shielding plate 5 , which will not be elaborated herein.

[0066] In addition, if Figure 4 As shown, since the grounding end plate 5-3 is formed of metal material and has elasticity, the fixing effect on the outside of the shell 1 is poor; therefore, a positioning portion 5-3-2 can be set at the end of the grounding end plate 5-3, so that the positioning portion 5-3-2 is bent in a direction away from the driving plate 4 and embedded in the shell 1, that is, after the grounding end plate 5-3 of the shielding plate 5 is installed, the grounding end plate 5-3 can be prevented from warping and other problems, thereby reducing the wiring difficulty of the grounding end plate 5-3.

[0067] In some embodiments, Figure 1 , Figure 2 as well as Figure 5As shown, the outer walls of the shell 1 are respectively connected with a terminal block 1-3 and two limit plates 1-4, the two limit plates 1-4 are connected to the opposite sides of the terminal block 1-3 and enclose to form a wire embedding groove (not marked in the figure), the grounding end plate 5-3 extends to the inside of the wire embedding groove and abuts against the surface of the terminal block 1-3, when the grounding end plate 5-3 of the shielding plate 5 extends from the inside of the shell 1 to the outside of the shell 1, the grounding end plate 5-3 can be embedded in the wire embedding groove so that the grounding end plate 5-3 abuts against the limit plates 1-4, and the position of the grounding end plate 5-3 is limited by the limit plates 1-4 to prevent the grounding end plate 5-3 from being misaligned; in addition, the terminal block 1-3 and the grounding end plate 5-3 are respectively provided with a wiring hole 1-5, and the two wiring holes 1-5 correspond to each other, which is convenient for fixing the grounding wire and other components on the terminal block 1-3 and then electrically connecting them to the grounding end plate 5-3.

[0068] More specifically, Figure 5 As shown, a mating groove 1-6 adapted to the positioning portion 5-3-2 is provided on the side of the terminal block 1-3 away from the cavity 1-1, and the positioning portion 5-3-2 is embedded in the mating groove 1-6; after the grounding terminal plate 5-3 is installed in the wire embedding groove, the positioning portion 5-3-2 can be embedded in the mating groove 1-6 to limit and fix the grounding terminal plate 5-3 through the mating groove 1-6 to ensure that the wiring hole 1-5 of the wiring terminal plate and the wiring hole 1-5 of the terminal block 1-3 are accurately connected.

[0069] In some embodiments, for the capacitor core 2, in order to establish an electrical connection relationship between the capacitor core 2 and the external circuit structure, such as Figure 2 and Figure 3 As shown, the capacitor core 2 has a first terminal block 2-1 and a second terminal block 2-2, which are used as the positive busbar and the negative busbar of the controller capacitor; wherein the first terminal block 2-1 is connected to the side of the capacitor core 2 away from the driving board 4, and is relatively far from the opening 1-2 of the shell 1. Based on the reasonable design of the controller capacitor and the reasonable arrangement of the terminal plate of the first terminal block 2-1, a through hole can be opened in the side wall of the shell 1, and the terminal plate of the first terminal block 2-1 respectively penetrates the potting glue 3 and the through holes opened on the side wall of the shell 1 and then extends to the outside of the shell 1, so as to establish an electrical connection relationship with the external circuit structure.

[0070] In addition, if Figure 2 and Figure 3 As shown, the side of the capacitor core 2 close to the driving board 4 is connected to a second terminal block 2-2. Compared with the first terminal block 2-1, the second terminal block 2-2 is relatively close to the opening 1-2 of the shell 1. Therefore, the terminal plate of the second terminal block 2-2 can extend from the inside of the shell 1 through the opening 1-2 to the outside of the shell 1 so as to establish an electrical connection relationship with the external circuit structure.

[0071] More specifically, in order to prevent at least one of the drive board 4 and the shielding plate 5 from contacting the second terminal block 2-2 and causing a short circuit, the second terminal block 2-2 can be arranged close to the side wall of the shell 1, so that the terminal plate of the second terminal block 2-2 forms a second bent portion 2-3 for avoiding the side wall of the shell 1, avoiding opening a hole at a position close to the opening 1-2 of the shell 1 and affecting the strength of the shell 1; at the same time, the second bent portion 2-3 can also be snapped onto the side wall of the shell 1 to increase its firmness on the side wall of the shell 1; because the second bent portion 2-3 is bent in a direction close to the drive board 4, the distance between the second terminal block 2-2 except the second bent portion 2-3 and the drive board 4 can be increased, so as to reserve sufficient wiring space for components such as grounding wires.

[0072] Exemplarily, the first wiring bank 2 - 1 and the second wiring bank 2 - 2 may be formed of copper or copper alloy, which will not be described in detail herein.

[0073] In some embodiments, for the first wiring row 2-1 and the second wiring row 2-2, as Figure 2 and Figure 3 As shown, on the one hand, the terminal plate of the second terminal block 2-2 is provided with a second bending portion 2-3. By providing a gap between the second bending portion 2-3 and the driving board 4, short circuit between the second bending portion 2-3 and the driving board 4 can be avoided to cause damage to the controller capacitor.

[0074] On the other hand, there is a gap between the second wiring row 2 - 2 and the shielding plate 5 , which can prevent the capacitor core 2 and the shielding plate 5 from being short-circuited, thereby ensuring the safety of the controller capacitor in daily use.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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 motor controller capacitor, characterized in that: include: A shell body, wherein the shell body has a cavity therein, and a side wall of the shell body is provided with an opening communicating with the cavity; A capacitor core, wherein the capacitor core is located in the cavity; A potting compound, wherein the potting compound is filled in the cavity and covers the capacitor core; a driving plate, the driving plate covering the opening and connected to the housing; A shielding plate, the shielding plate is located between the capacitor core and the driving plate, the positive projection of the capacitor core on the shielding plate is located inside the shielding plate, at least a portion of the shielding plate is located in the cavity and is electrically connected to the driving plate; Among them, the shielding plate includes a plurality of crests connected in sequence, the crests protrude in the direction close to the driving plate, and at least part of the crests abut against the surface of the driving plate; a recess is formed between two adjacent crests, the recess is embedded in the potting glue and there is a gap between the recess and the capacitor core.

2. The motor controller capacitor according to claim 1, characterized in that: The extension directions of any two of the crest portions are parallel to each other, and the extension direction of each of the crest portions is perpendicular to the arrangement direction of the plurality of crest portions.

3. The motor controller capacitor according to claim 1, characterized in that: A spring sheet is provided on one side of the crest portion close to the driving plate. The spring sheet first extends toward the driving plate and then bends toward the arrangement direction of the plurality of crest portions. The spring sheet abuts against the side of the driving plate close to the capacitor core.

4. The motor controller capacitor according to claim 3, characterized in that: A window area is provided on one side of the driving plate close to the capacitor core, and the elastic sheet abuts against the surface of the window area to electrically connect the driving plate to the shielding plate.

5. The motor controller capacitor according to claim 1, characterized in that: Also includes multiple support columns, The extension direction of each support column is the same as the protruding direction of the crest of the shell; wherein some of the support columns are connected to the inner bottom wall of the shell and respectively penetrate the capacitor core and the shielding plate, and some of the support columns are connected to the side wall of the shell and are distributed along the circumference of the shell; The shell is connected to the driving plate through the supporting column; in the protruding direction of the crest part, there is a gap between the opening and the driving plate.

6. The motor controller capacitor according to claim 5, characterized in that: The end of the support column is provided with a connecting column that passes through the driving board. The outer diameter of the connecting column is smaller than the outer diameter of the support column. The connecting column forms a limiting portion for fixing the driving board at one end away from the capacitor core.

7. The motor controller capacitor according to claim 1, characterized in that: The shielding plate is connected to a grounding end plate, and the grounding end plate extends from the inside of the shell to the outside of the shell through the opening; the grounding end plate is provided with a first bending portion for avoiding the side wall of the shell, and the first bending portion is bent toward a direction close to the driving plate; A positioning portion is provided at the end of the grounding end plate, and the positioning portion is bent in a direction away from the driving plate and embedded in the housing.

8. The motor controller capacitor according to claim 7, characterized in that: The outer side walls of the housing are respectively connected with a wiring seat and two limiting plates, the two limiting plates are connected to opposite sides of the wiring seat and enclose a wire embedding groove, the grounding end plate extends into the wire embedding groove and abuts against the surface of the wiring seat; the wiring seat and the grounding end plate are provided with wiring holes corresponding to each other; An engaging groove adapted to the positioning portion is formed on one side of the wiring seat away from the cavity, and the positioning portion is embedded in the engaging groove.

9. The motor controller capacitor according to claim 1, characterized in that: The side of the capacitor core away from the driving board is connected to a first wiring row, and the terminal plates of the first wiring row respectively penetrate the potting glue and the side wall of the shell and extend to the outside of the shell; A second terminal block is connected to the side of the capacitor core close to the driving board, and a terminal plate of the second terminal block extends from the inside of the shell to the outside of the shell through the opening; the terminal plate of the second terminal block is provided with a second bending portion for avoiding the side wall of the shell, and the second bending portion is bent in a direction close to the driving board.

10. The motor controller capacitor according to claim 9, characterized in that: There is a gap between the second bending portion and the driving board, and there is a gap between the second wiring row and the shielding plate.

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